CN116262064A - Nail clamp for external fixing support - Google Patents

Abstract

Translated fromChinese

本发明涉及一种外固定支架钉夹，包括：具有连接轴的第一钉夹；与连接轴相对滑动连接的第二钉夹；锁紧机构，包括固定盖、转动环，固定盖与连接轴固定连接，转动环转动连接于连接轴，转动环相对于连接轴沿第一方向转动时能驱动第二钉夹朝第一钉夹移动；阻挡单元，具有阻挡转动环以限制转动环沿与第一方向相反的第二方向转动的阻挡状态，以及避让转动环的避让状态；解锁机构，用以驱动阻挡单元由阻挡状态切换至避让状态。夹紧过程中，阻挡单元使转动环只能单向转动，从而第一钉夹和第二钉夹快速夹紧骨针的同时即实现锁死，从而实现一键锁死、快速锁定功能，简化了操作流程，缩短手术时间，提高手术效率。

The invention relates to a nail clip for an external fixation bracket, comprising: a first nail clip with a connecting shaft; a second nail clip relatively slidably connected to the connecting shaft; a locking mechanism, including a fixed cover, a rotating ring, the fixed cover and the connecting shaft Fixed connection, the rotating ring is rotatably connected to the connecting shaft, when the rotating ring rotates relative to the connecting shaft in the first direction, it can drive the second nail clip to move towards the first nail clip; the blocking unit has a blocking rotating ring to limit the rotating ring along with the first nail clip A blocking state in which one direction is opposite to the second direction of rotation, and an avoidance state of the avoidance rotating ring; an unlocking mechanism, used to drive the blocking unit to switch from the blocking state to the avoidance state. During the clamping process, the blocking unit makes the rotating ring only rotate in one direction, so that the first nail clamp and the second nail clamp can quickly clamp the bone needle and at the same time achieve locking, thereby realizing one-button locking and quick locking functions, simplifying the The operation process is simplified, the operation time is shortened, and the operation efficiency is improved.

Description

Nail clamp for external fixing support

Technical Field

The invention relates to the technical field of orthopedic medical instruments, in particular to an external fixing support nail clamp.

Background

In the fracture treatment operation, especially in the implementation process of the operation for treating open fracture, the bone needle is clamped by an external fixing bracket nail clamp, so that the purpose of fixing the fracture block is often realized. But the current common external fixation support nail presss from both sides and fixes the bone needle with the mode of screw tightening, and the loading and unloading operation is loaded down with trivial details, and is not convenient enough.

Disclosure of Invention

Based on the above, the invention aims to provide the external fixing bracket nail clamp which can rapidly lock the bone needle and improve the operation efficiency.

An external fixation bracket nail clamp, comprising: a first clip including a connecting shaft; the second nail clamp is in relative sliding connection with the connecting shaft, and the connecting shaft penetrates through the second nail clamp; the locking mechanism comprises a fixed cover and a rotating ring, wherein the fixed cover and the rotating ring are both positioned on one side of the second nail clamp opposite to the first nail clamp, the fixed cover is fixedly connected with the connecting shaft, the rotating ring is rotationally connected with the connecting shaft, the fixed cover limits the axial movement of the rotating ring, and matching surfaces between the rotating ring and the second nail clamp are provided with slopes in the circumferential direction around the connecting shaft, so that when the rotating ring rotates relative to the connecting shaft along the first direction, the rotating ring can drive the second nail clamp to move towards the first nail clamp; a blocking unit disposed between the fixed cover and the rotating ring, the blocking unit having a blocking state blocking the rotating ring to restrict the rotating ring from rotating in a second direction opposite to the first direction, and an avoidance state avoiding the rotating ring; the unlocking mechanism is arranged on the fixed cover and used for driving the blocking unit to be switched from the blocking state to the avoiding state.

When the bone needle needs to be clamped, the bone needle is firstly placed in the first groove of the first nail clamp. Then the rotating ring is rotated to drive the second nail clamp to move towards the first nail clamp, and the reaction force of the second nail clamp acting on the rotating ring pulls the first nail clamp upwards through the connecting shaft, so that the first nail clamp and the second nail clamp rapidly and firmly clamp the bone needle. In the clamping process, the blocking unit enables the rotating ring to rotate in one direction only, so that the first nail clamp and the second nail clamp can clamp the bone needle rapidly and simultaneously realize locking, thereby realizing one-key locking and rapid locking functions, simplifying operation flow, shortening operation time and improving operation efficiency.

In one embodiment, the connecting shaft comprises a non-circular portion, and the second nail clamp is provided with a non-circular hole which is matched with the shape of the non-circular portion.

In one embodiment, the connecting shaft and the second nail clamp can be matched in a relatively rotatable manner, a concave-convex matching structure is arranged between the second nail clamp and the first nail clamp, and the concave-convex matching structure limits the relative rotation of the first nail clamp and the second nail clamp.

In one embodiment, a first groove is formed in one side of the first nail clamp facing the second nail clamp, a second groove is formed in one side of the second nail clamp facing the first nail clamp, and a containing hole for containing a bone needle is formed when the second groove is in butt joint with the first groove.

In one embodiment, one of the rotating ring and the blocking unit is provided with a rotatable rotation stopping member, the other one of the rotating ring and the blocking unit is provided with a matching structure, the rotation stopping member can be selectively matched with the matching structure, the rotation stopping member is used for limiting the rotating ring to rotate along the second direction, and the unlocking mechanism is used for driving the rotation stopping member to rotate.

In one embodiment, the rotating ring is provided with a mating structure; the blocking unit comprises an elastic structure arranged on the fixed cover and a rotation stopping piece rotatably connected with the fixed cover, the rotation stopping piece can be selectively matched with the matching structure, and the elastic structure is abutted against the rotation stopping piece and provides pressure for matching the rotation stopping piece with the matching structure; the unlocking mechanism is used for driving the rotation stopping piece to be separated from the matching structure.

In one embodiment, the mating structure is a ratchet and the rotation stop is a pawl; or the matching structure comprises a plurality of arc tooth surfaces arranged along the circumferential direction, the rotation stopping piece comprises a spring piece connected with the fixed cover, and the spring piece elastically pushes against the arc tooth surfaces; or the matching structure comprises a plurality of arc tooth surfaces arranged along the circumferential direction, the rotation stopping piece is a rigid piece, and the elastic structure enables the rigid piece to be abutted on the arc tooth surfaces; or the matching structure and the rotation stopping piece are magnetic and have opposite polarities, and the elastic structure enables the rotation stopping piece to be in a position capable of limiting the rotation of the matching structure.

In one embodiment, the elastic structure comprises a guide pin connected to the fixed cover and a spring sleeved on the guide pin, and the spring elastically abuts against the rotation stopping piece and provides pressure for enabling the rotation stopping piece to be matched with the matching structure.

In one embodiment, the mating structure includes a plurality of arcuate tooth surfaces disposed along the circumferential direction; the rotation stopping piece comprises an elastic piece connected to the fixed cover, and the elastic piece is propped against the arc tooth surface.

In one embodiment, the fixed cover is located on a side of the rotating ring opposite to the second nail clamp, and the fixed cover is attached to the rotating ring.

In one embodiment, the unlocking mechanism comprises a first operating member rotatably arranged relative to the fixed cover, the first operating member comprises a first operating portion and a first driving portion connected with the first operating portion, the first operating portion is located at one side of the fixed cover opposite to the rotating ring, and the first driving portion penetrates through the fixed cover and is connected with the rotation stopping member.

In one embodiment, the first driving part comprises a rotating shaft and an eccentric shaft which are connected, the rotating shaft is rotatably connected to the fixed cover, the axis of the eccentric shaft is eccentric to the axis of the rotating shaft, and the eccentric shaft is connected with the rotation stopping piece; the first operation portion is disposed coaxially with the rotation shaft.

In one embodiment, the fixed cover is provided with an arc-shaped groove penetrating the fixed cover, the unlocking mechanism comprises a second operating piece which is slidably arranged relative to the fixed cover, the second operating piece comprises a second operating part and a second driving part connected with the second operating part, the second operating part is located at one side, opposite to the rotating ring, of the fixed cover, the second driving part is slidably matched with the arc-shaped groove, and the second driving part is connected with the rotation stopping piece.

In one embodiment, a cavity is formed in a side of the rotating ring facing the fixed cover, and the rotation stopping member and the matching structure are both located in the cavity.

Drawings

Fig. 1 is a schematic perspective view of an external fixing bracket nail clamp according to an embodiment.

Fig. 2 is a schematic cross-sectional structure of the external fixation bracket nail clip shown in fig. 1, in which the upper cover and the knob are omitted.

Fig. 3 is a top view of the outer fixed bracket clip of fig. 1, illustrating only the blocking unit and the rotating ring.

Fig. 4 is a schematic perspective view of a first clip.

Fig. 5 is a top view of the first clip of fig. 4.

Fig. 6 is a schematic perspective view of a second clip.

Fig. 7 and 8 are side and top views, respectively, of the second staple clip of fig. 6.

FIG. 9 is a schematic view of another assembly of the second clip and the first clip.

Fig. 10 is a schematic perspective view of a rotary ring.

Fig. 11 and 12 are side and top views, respectively, of the rotating ring of fig. 10.

Fig. 13 is a schematic view of the assembly of the clip rotating ring with the second pin.

Fig. 14 is a schematic structural view of a knob.

Fig. 15 is a schematic structural view of an upper cover in another embodiment.

FIG. 16 is a schematic diagram of another embodiment of a lever.

FIG. 17 is a schematic view of another embodiment of the lever, lever and pawl.

The corresponding numbers of the relevant elements in the figures are as follows:

100. an outer fixing bracket nail clamp; 10. a first staple holder; 110. a first clamp body; 111. a dovetail structure; 112. a first groove; 120. a connecting shaft; 121. a sliding part; 122. a positioning part; 20. a second staple holder; 210. a first clamp body; 212. asecond groove 212; 213. a through hole; 220. a second mating surface; 221. a second starting point; 222. a second endpoint; 101. a receiving hole; 30. a locking mechanism; 310. a fixed cover; 311. an arc-shaped groove; 320. a rotating ring; 321. a mating structure; 322. a first mating surface; 3221. a first starting point; 3222. a first endpoint; 323 (323); a spanner portion; 324. a cavity; 40. a blocking unit; 410. a rotation stopper; 411. a pivot hole; 412. a mounting hole; 420. an elastic structure; 421. a guide pin; 422. a spring; 50. an unlocking mechanism; 510. a first operating member; 520. a first operation section; 530. a first driving section; 531. a rotating shaft; 532. an eccentric shaft; 510', a second operating member; 520', a second operation portion; 530', a second driving section; 60. a concave-convex matching structure; 610. a semicircular protrusion; 620. a semicircular groove.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The embodiment of the invention provides an external fixing bracket nail clamp which is used for forming an external fixing bracket system, and can clamp a bone needle in the fracture treatment process so as to achieve the purpose of fixing a fracture block.

As shown in fig. 1 to 3, an external fixedbracket clip 100 according to an embodiment of the present invention includes afirst clip 10, asecond clip 20, alocking mechanism 30, a blockingunit 40 and an unlockingmechanism 50, wherein thefirst clip 10 is used to be connected with a connecting frame in an external fixed bracket system, thelocking mechanism 30 is used to drive thesecond clip 20 to move so as to clamp bone pins (not shown) together with thefirst clip 10, the blockingunit 40 provides pressure to drive thelocking mechanism 30 to maintain the locking state of thesecond clip 20 and thefirst clip 10, and the unlockingmechanism 50 is used to release the locking state. The externalfixation stent staple 100 of an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

As shown in connection with fig. 1, 2 and 4, thefirst staple cartridge 10 includes afirst cartridge body 110. The upper end of thefirst clamping body 110 is fixedly connected with a connectingshaft 120. The lower end of thefirst clamp 110 is provided with adovetail structure 111, and thedovetail structure 111 can be quickly connected with a corresponding dovetail groove on the connecting frame. Of course, thefirst clamping body 110 can be quickly assembled and disassembled with the connecting frame in other manners. For example by means of bolting, snap-on connection, magnetic attraction, etc. The connectingshaft 120 is slidably coupled to thesecond jaw body 210 of thesecond jaw 20.

The upper end of thefirst clamping body 110 is provided with a plurality offirst grooves 112. Thefirst grooves 112 are arranged in one-to-one correspondence with a plurality ofsecond grooves 212 arranged on thesecond clamp body 210 of thesecond nail clamp 20. Thefirst recess 112 forms a receivinghole 101 for receiving the bone pin when it is docked with thesecond recess 212. The inner diameter of the receivinghole 101 is adapted to the diameter of the bone needle. Thefirst groove 112 and thesecond groove 212 are each, but not limited to, semicircular grooves. For example, thefirst groove 112 may be a 3/4 circular arc groove, and thesecond groove 212 may be a 1/4 circular arc groove, which form a completeaccommodating hole 101 when being abutted.

As shown in fig. 4 and 5, theconnection shaft 120 includes a slidingportion 121 and apositioning portion 122, wherein the slidingportion 121 is slidably connected with thesecond jaw body 210 of thesecond jaw 20. The radial dimension of the connectingshaft 120 at thepositioning portion 122 is smaller than the radial dimension at the slidingportion 121. The slidingportion 121 is a non-circular portion. By non-circular portion is meant that its radial cross-sectional profile is not circular. The non-circular portion is specifically a square portion, i.e. a square cross section.

As shown in fig. 2 and 6, thesecond clamp body 210 of thesecond nail clamp 20 is provided with a throughhole 213. The throughhole 213 is shaped to fit the shape of the slidingportion 121 of theconnection shaft 120. Specifically, in the present embodiment, the throughhole 213 is a non-circular hole. The radial cross-sectional profile of the non-circular aperture is not circular. The throughholes 213 are specifically square holes. When thesecond clip 20 is assembled with thefirst clip 10, the connectingshaft 120 of thefirst clip 10 passes through the throughhole 213 on thesecond clip body 210, and the slidingpart 121 is matched with the throughhole 213. Since the cross-sectional profiles of the slidingportion 121 and the throughhole 213 are not circular, thesecond clamp 20 and thefirst clamp 10 can be prevented from rotating relative to each other when they are engaged. Note that the radial cross section of the slidingportion 121 is not limited to be square, and the radial cross section of the throughhole 213 is not limited to be square. For example, the radial cross-sectional profiles of the slidingportion 121 and the throughhole 213 may each be pentagonal.

In the above embodiment, thesecond clamp 20 and thefirst clamp 10 are only relatively slidable but not relatively rotatable by the cooperation of the non-circular portion and the non-circular hole. Therefore, in the process of driving thesecond nail clamp 20 and thefirst nail clamp 10 to be close to each other and clamping the bone needle by using thelocking mechanism 30, thesecond nail clamp 20 and thefirst nail clamp 10 can not rotate relatively, thesecond nail clamp 20 and thefirst nail clamp 10 can be directly close to each other, and the clamping speed is high; and the driving force of thelocking mechanism 30 is more used to drive thesecond jaw 20 and thefirst jaw 10 to clamp the bone needle, the locking effect can be ensured.

In other embodiments, the connectingshaft 120 and thesecond clamp 20 can rotate relatively, which can simplify the structural design of the connectingshaft 120 and thesecond clamp 20. The connectingshaft 120 is not provided with a non-circular portion at this time. In order to prevent thesecond jaw 20 and thefirst jaw 10 from rotating relative to each other, a male-female engagement structure 60 is provided between thesecond jaw 20 and thefirst jaw 10 as shown in fig. 9. In an example, thefirst clip 10 is provided with asemicircular protrusion 610, thesecond clip 20 is provided with asemicircular groove 620, and when thefirst clip 10 and thesecond clip 20 are slidably connected via the connectingshaft 120, thesemicircular protrusion 610 is embedded into thesemicircular groove 620, so as to prevent thesecond clip 20 and thefirst clip 10 from rotating relatively.

As shown in fig. 1 and 2, thelocking mechanism 30 includes a fixedcover 310, arotating ring 320. Thestationary cover 310 and therotating ring 320 are both located on the side of thesecond clip 20 facing away from thefirst clip 10. Referring to fig. 1, 2 and 4 in combination, therotating ring 320 is rotatably connected to thepositioning portion 122 of the connectingshaft 120, and therotating ring 320 can be rotated to drive thesecond clamp 20 to move toward thefirst clamp 10, and then thesecond clamp 20 clamps the bone pins together with thefirst clamp 10. The fixedcover 310 and the connectingshaft 120 are fixedly connected to thepositioning portion 122 of the connectingshaft 120, the fixedcover 310 is located on one side of therotating ring 320 opposite to thesecond nail clamp 20 and is attached to therotating ring 320, and the fixedcover 310 can axially limit therotating ring 320. The fixingcap 310 is fixed to theconnection shaft 120 specifically by screwing. The fixingcover 310 may also be fastened to theconnection shaft 120 by means of clamping, welding, bonding, etc.

As shown in fig. 12, the outer contour of the part of therotating ring 320 is hexagonal in the circumferential direction, forming awrench part 323 that can be engaged with a wrench. This allows therotation ring 320 to be rotated by a wrench, thereby improving the operation efficiency.

As shown in fig. 10 to 13, referring to fig. 2, a side of therotary ring 320 facing thesecond clip 20 is provided with afirst mating surface 322. Thefirst mating surface 322 has a slope in a circumferential direction around the connectingshaft 120. In other words, thefirst mating surface 322 is spiral. The positions of the points on thefirst mating surface 322 in the circumferential direction in the axial direction of the connectingshaft 120 are different. As illustrated by way of example with the connectingshaft 120 being disposed vertically, referring to fig. 11, in a vertical direction, afirst start point 3221 of thefirst mating surface 322 is located below afirst end point 3222 of thefirst mating surface 322. As shown in fig. 6 to 8, referring to fig. 3 in combination, a side of thesecond clip 20 facing therotating ring 320 is provided with asecond mating surface 220. Thesecond mating surface 220 has a slope in a circumferential direction around theconnection shaft 120. In other words, thesecond mating surface 220 is spiral. That is, the positions of the points on thesecond mating surface 220 in the circumferential direction in the axial direction of the connectingshaft 120 are different. As shown in fig. 7, thesecond starting point 221 of thesecond mating surface 220 is located below thesecond ending point 222 of thesecond mating surface 220 in the vertical direction, as shown by way of example with the connectingshaft 120 being vertically disposed.

After the outer fixedbracket clip 100 is assembled, as shown in fig. 13, thefirst mating surface 322 of therotating ring 320 is attached to thesecond mating surface 220 of thesecond clip 20. When therotary ring 320 rotates in the first direction, thefirst mating surface 322 acts on thesecond mating surface 220 and pushes thesecond clip 20 to slide along the axial direction of the connectingshaft 120 and close to thefirst clip 10. Referring to fig. 3, therotation ring 320 is specifically configured to rotate clockwise when rotated in a first direction. In addition, for convenience of the following description, the sliding of thesecond jaw 20 in the axial direction of theconnection shaft 120 and approaching thefirst jaw 10 is referred to as the downward movement of thesecond jaw 20. Meanwhile, during the process of pushing thesecond clip 20 downward by therotating ring 320, therotating ring 320 is also subjected to an upward reaction force from thesecond clip 20, and since therotating ring 320 is connected to the connectingshaft 120, the connectingshaft 120 is connected to thefirst clip 10, and thus the reaction force tends to move thefirst clip 10 upward and close to thesecond clip 20. That is, when therotary ring 320 rotates in the first direction, the first andsecond clamps 10 and 20 each have a moving tendency to approach each other, so that the bone pins can be rapidly clamped. It will be appreciated that thefirst clip 10 and thesecond clip 20 may release the bone pin when therotating ring 320 is rotated in a second direction opposite to the first direction.

Referring to fig. 1 and 3 in combination, the blockingunit 40 is disposed between thefixed cover 310 and therotating ring 320, and the blockingunit 40 can elastically abut against therotating ring 320 to limit therotating ring 320 from rotating in a second direction opposite to the first direction with respect to theconnection shaft 120. It will be appreciated that when the first direction is clockwise, the second direction is counter-clockwise.

Therotating ring 320 is provided with amating structure 321, specifically a ratchet. The blockingunit 40 includes arotation stopper 410 and anelastic structure 420. Therotation stopper 410 is specifically a pawl. Therotation stopper 410 is rotatably coupled to thestationary cover 310 by a pivot (not shown). As shown in fig. 3, therotation stopper 410 is provided with apivot hole 411 for cooperating with a pivot on the fixedcover 310. Theresilient structure 420 abuts the pawl and provides pressure to engage the pawl with the ratchet. Such that the blockingunit 40 has a blocking state of blocking therotating ring 320 to restrict therotating ring 320 from rotating in a second direction opposite to the first direction, and a dodging state of dodging therotating ring 320. Wherein the blockingunit 40 is in a blocking state when the pawl is engaged with the ratchet; when the pawl is disengaged from the ratchet, the blockingunit 40 is in the escape state. When the pawl is engaged with the ratchet, therotating ring 320 cannot rotate in the second direction but can rotate only in the first direction, i.e., therotating ring 320 can be maintained in a state of being rotatable only in one direction with respect to theconnection shaft 120. The positions of therotation stopper 410 and theengagement structure 321 may also be interchanged.

When therotary ring 320 is specifically arranged, the top of the rotary ring 320 (the side of therotary ring 320 facing the fixed cover 310) is attached to the fixedcover 310 and is provided with acavity 324, and the pawl and the ratchet are both positioned in thecavity 324. Thereby facilitating saving the size of the clip in the axial direction of the connectingshaft 120.

In one example, theelastic structure 420 includes aguide pin 421 connected to the fixedcover 310, and aspring 422 sleeved on theguide pin 421. Thespring 422 resiliently abuts the pawl and provides pressure to engage the pawl with the ratchet. Theguide pin 421 can guide thespring 422, so that thespring 422 is prevented from being misplaced and losing function. Of course, theguide pin 421 may be omitted. For example, a guide groove may be provided on the fixedcover 310, and then thespring 422 is installed in the guide groove.

In another embodiment, themating structure 321 includes a plurality of arcuate tooth surfaces disposed in a circumferential direction. Therotation stopping member 410 includes a spring plate connected to the fixedcover 310, and the spring plate elastically pushes against the curved tooth surface. When the elastic sheet is pressed against the arc tooth surface, the blockingunit 40 is in a blocking state, and therotating ring 320 can only rotate in the first direction but not rotate in the second direction. When the elastic sheet is not pressed against the arc-shaped tooth surface, the blockingunit 40 is in an avoidance state.

In yet another embodiment, themating structure 321 includes a plurality of arcuate tooth surfaces disposed in a circumferential direction. Therotation stop 410 is a rigid member, such as a rigid sheet, against which theresilient structure 420 abuts and provides pressure. When the sheet is pressed against the curved tooth surface, the blockingunit 40 is in a blocking state, and when the sheet is not pressed against the curved tooth surface, the blockingunit 40 is in a dodging state.

In yet another embodiment, the rotation stop 410 may be configured to limit the reverse rotation of therotating ring 320 by magnetically repelling each other. Aspring 422 in the blockingunit 40 may maintain therotation stopper 410 in a set position. For example, therotation stop member 410 and theengagement structure 321 have magnetic properties but opposite polarities, respectively, so that therotation stop member 410 gives a repulsive force to theengagement structure 321, and prevents theengagement structure 321 from approaching in the reverse direction, thereby achieving the purpose of preventing therotation ring 320 from rotating in the reverse direction. And, when therotating ring 320 rotates, therotation stopping member 410 can rotate along the same direction as therotating ring 320 under the action of thespring 422, so that therotation stopping member 410 always gives a repulsive force to themating structure 321. When therotation stopping member 410 is at a position capable of giving a repulsive force to thematching structure 321, the blockingunit 40 is in a blocking state; conversely, the blockingunit 40 is in the evasive state.

The unlockingmechanism 50 is disposed on the fixedcover 310, and the unlockingmechanism 50 is used for driving therotation stopping member 410 to overcome the pressure and separate from the matchingstructure 321. Specifically, by operating the unlockingmechanism 50, the pawl can be rotated and disengaged from the ratchet wheel such that the pawl no longer restricts rotation of therotating ring 320 in the second direction.

In one example, referring to fig. 1 and 14 in combination, the unlockingmechanism 50 includes afirst operating member 510 rotatably disposed with respect to thestationary cover 310. Thefirst operation member 510 includes afirst operation portion 520 and afirst driving portion 530 connected to thefirst operation portion 520.

Thefirst operating portion 520 is located at a side of the fixedcover 310 opposite to therotating ring 320. When specifically provided, thefirst operating portion 520 abuts against the surface of thestationary cover 310 to reduce the axial dimension.

Thefirst driving part 530 is disposed through the fixedcover 310 and connected to therotation stop member 410. Specifically, thefirst driving part 530 includes arotation shaft 531, aneccentric shaft 532 connected. Therotation shaft 531 is rotatably coupled to the fixingcover 310 in the mountinghole 412. The axis of therotation shaft 531 is coaxial with the axis of thefirst operation section 520. The axis ofeccentric shaft 532 is eccentric to the axis ofrotation shaft 531, andeccentric shaft 532 is connected torotation stopper 410. Specifically, referring to fig. 3 and 14 in combination, therotation stopper 410 is provided with a mountinghole 412, and an end of theeccentric shaft 532 is fitted to the mountinghole 412.

With the above arrangement, thefirst operating member 510 is eccentrically coupled with therotation stopper 410; so that the rotation of thefirst operating portion 520 drives therotation stopper 410 to pivot around therotation stopper 410 and separate from the engagingstructure 321 through theeccentric shaft 532, and thefirst operating portion 520 requires a small operating space.

The implementation of the unlockingmechanism 50 is not limited to the above example. Referring to fig. 15 to 17, in another embodiment, an arc-shapedslot 311 is provided on the fixedcover 310. The unlockingmechanism 50 includes a second operating member 510' slidably disposed with respect to thestationary cover 310. The second operating member 510 'includes a second operating portion 520', a second driving portion 530 'coupled to the second operating portion 520', the second driving portion 530 'being slidably coupled to the arc-shapedgroove 311 and coupled to therotation stopper 410, and the second operating portion 520' being abutted against the surface of the fixedcover 310. Thus, by sliding the second operating portion 520', therotation stopper 410 can be driven to rotate around the pivot of therotation stopper 410 and be separated from the engagingstructure 321.

The working principle of the external fixationbracket nail clamp 100 of the embodiment of the present invention is briefly described as follows.

When it is desired to clamp a bone needle, the bone needle is first placed in thefirst recess 112 of thefirst clip 10. Then, therotating ring 320 is rotated along the needle, therotating ring 320 drives thesecond jaw 20 to move downward, and the reaction force of thesecond jaw 20 acting on therotating ring 320 pulls thefirst jaw 10 upward through theconnection shaft 120, so that the first andsecond jaws 10 and 20 rapidly and firmly clamp the bone needle. In the above-mentioned clamping process, the blockingunit 40 keeps the pawl and the ratchet in a matched state, so that therotating ring 320 can only rotate clockwise, thereby realizing locking while thefirst nail clamp 10 and thesecond nail clamp 20 clamp the bone needle rapidly, thereby realizing one-key locking and rapid locking functions, simplifying the operation flow, shortening the operation time and improving the operation efficiency.

When the bone needle needs to be released, thefirst operating part 520 is rotated, so that theeccentric shaft 532 drives the pawl to rotate against the resistance of thespring 422 and separate from the ratchet wheel. At this time, therotating ring 320 is rotated counterclockwise so that the first andsecond clips 10 and 20 have a relative movement space in the axial direction of theconnection shaft 120. Then the bone needle can be withdrawn.

Alternatively, blockingunit 40 may not includespring 422, which is actuated by unlockingmechanism 50 to switch between the blocking state and the retracted state. For example, the blockingunit 40 includes a pawl, and the unlockingmechanism 50 can rotate the pawl between positions separated from or engaged with the ratchet. When the pawl is engaged with the ratchet wheel, therotary ring 320 can only be rotated unidirectionally to clamp the bone needle. Therotating ring 320 can be rotated in reverse when the pawl is disengaged from the ratchet.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (12)

1. An external fixation bracket nail clamp, characterized in that the external fixation bracket nail clamp comprises:

a first clip including a connecting shaft;

the second nail clamp is in relative sliding connection with the connecting shaft, the connecting shaft penetrates through the second nail clamp, and an accommodating hole for accommodating a bone needle is formed when the second nail clamp is in butt joint with the first nail clamp;

the locking mechanism comprises a fixed cover and a rotating ring, wherein the fixed cover and the rotating ring are both positioned on one side of the second nail clamp opposite to the first nail clamp, the fixed cover is fixedly connected with the connecting shaft, the rotating ring is rotationally connected with the connecting shaft, the fixed cover limits the axial movement of the rotating ring, and matching surfaces between the rotating ring and the second nail clamp are provided with slopes in the circumferential direction around the connecting shaft, so that when the rotating ring rotates relative to the connecting shaft along the first direction, the rotating ring can drive the second nail clamp to move towards the first nail clamp;

a blocking unit disposed between the fixed cover and the rotating ring, the blocking unit having a blocking state blocking the rotating ring to restrict the rotating ring from rotating in a second direction opposite to the first direction, and an avoidance state avoiding the rotating ring;

the unlocking mechanism is arranged on the fixed cover and used for driving the blocking unit to be switched from the blocking state to the avoiding state.

2. The external fixation bracket clip of claim 1, wherein the connection shaft comprises a non-circular portion, and the second clip is provided with a non-circular aperture that is shaped to fit the non-circular portion.

3. The external fixation bracket clip of claim 1, wherein the connecting shaft is rotatably engaged with the second clip, and wherein a male-female engagement structure is provided between the second clip and the first clip, the male-female engagement structure limiting relative rotation of the first clip and the second clip.

4. The external fixation bracket nail clamp of claim 1, wherein one of the rotating ring and the blocking unit is provided with a rotatable rotation stopping member, the other one of the rotating ring and the blocking unit is provided with a matching structure, the rotation stopping member can be selectively matched with the matching structure, the rotation stopping member is used for limiting the rotating ring to rotate along the second direction, and the unlocking mechanism is used for driving the rotation stopping member to rotate.

5. The external fixation bracket nail clamp of claim 4, wherein the rotating ring is provided with a mating structure; the blocking unit comprises an elastic structure arranged on the fixed cover and a rotation stopping piece rotatably connected with the fixed cover, the rotation stopping piece can be selectively matched with the matching structure, and the elastic structure is abutted against the rotation stopping piece and provides pressure for matching the rotation stopping piece with the matching structure; the unlocking mechanism is used for driving the rotation stopping piece to be separated from the matching structure.

6. The external fixation bracket nail clamp of claim 5, wherein the mating structure is a ratchet and the rotation stop is a pawl; or the matching structure comprises a plurality of arc tooth surfaces arranged along the circumferential direction, the rotation stopping piece comprises a spring piece connected with the fixed cover, and the spring piece elastically pushes against the arc tooth surfaces; or the matching structure comprises a plurality of arc tooth surfaces arranged along the circumferential direction, the rotation stopping piece is a rigid piece, and the elastic structure enables the rigid piece to be abutted on the arc tooth surfaces; or the matching structure and the rotation stopping piece are magnetic and have opposite polarities, and the elastic structure enables the rotation stopping piece to be in a position capable of limiting the rotation of the matching structure.

7. The external fixation bracket clip of claim 5, wherein the elastic structure comprises a guide pin connected to the fixation cover, a spring sleeved on the guide pin, the spring elastically abutting the rotation stop member and providing a pressure force to engage the rotation stop member with the engagement structure.

8. The external fixation bracket clip of claim 4, wherein the mating structure comprises a plurality of arcuate tooth surfaces disposed along the circumferential direction; the rotation stopping piece comprises an elastic piece connected to the fixed cover, and the elastic piece is propped against the arc tooth surface.

9. The external fixation bracket nail clamp of claim 4, wherein the fixation cap is located on a side of the rotating ring opposite the second nail clamp, and wherein the fixation cap is in engagement with the rotating ring.

10. The external fixation bracket nail clamp of claim 9, wherein the unlocking mechanism comprises a first operating member rotatably arranged relative to the fixation cover, the first operating member comprises a first operating portion and a first driving portion connected with the first operating portion, wherein the first operating portion is positioned on one side of the fixation cover opposite to the rotating ring, and the first driving portion penetrates through the fixation cover and is connected with the rotation stopping member.

11. The external fixation bracket nail clamp of claim 10, wherein the first driving part comprises a rotating shaft and an eccentric shaft which are connected, the rotating shaft is rotationally connected with the fixed cover, the axis of the eccentric shaft is eccentrically arranged with the axis of the rotating shaft, and the eccentric shaft is connected with the rotation stopping piece; the first operation portion is disposed coaxially with the rotation shaft.

12. The external fixation bracket nail clamp of claim 9, wherein the fixation cover is provided with an arc-shaped groove penetrating the fixation cover, the unlocking mechanism comprises a second operation piece which is arranged in a sliding manner relative to the fixation cover, the second operation piece comprises a second operation part and a second driving part connected with the second operation part, the second operation part is positioned on one side of the fixation cover opposite to the rotating ring, the second driving part is in sliding fit with the arc-shaped groove, and the second driving part is connected with the rotation stopping piece.

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