Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a driving mechanism and a medical anastomat, and the deformation of a pushing piece is effectively limited through the limiting effect of a bulge-stopping component on the pushing piece.
The embodiment of the invention provides a medical anastomat, which is used for a medical anastomat and comprises a body and a nail head part positioned at the distal end side of the body, wherein the driving mechanism comprises:
A pusher, a proximal side of which is located in the body and which extends into the head portion in an axial direction of the body;
The expansion stopping assembly is arranged on one side of the pushing piece and comprises a first expansion stopping sheet and a second expansion stopping sheet, the proximal end side of the first expansion stopping sheet is connected with the body, the distal end side of the first expansion stopping sheet is rotatably connected with the proximal end side of the second expansion stopping sheet, and the distal end side of the second expansion stopping sheet is connected with the nail head;
When the pin head swings relative to the axial direction of the body, the pushing piece swings along with the pin head, and the pin head drives the second expansion-stopping piece to rotate relative to the first expansion-stopping piece.
Optionally, when the nail head extends along the axial direction of the body, the first expansion stop piece and the second expansion stop piece both extend along the axial direction of the body.
Optionally, two sides of the pushing piece are respectively provided with one expansion stopping component.
Optionally, the nail head can swing along the first radial direction of body, the impeller includes a plurality of pushing blade, a plurality of pushing blade are followed the first radial direction of body stacks gradually and sets up, the expansion prevention subassembly sets up in the outside of the pushing blade of outermost.
Optionally, the expansion-stopping assembly further comprises a connecting pin, and the second expansion-stopping piece is rotatably connected to the first expansion-stopping piece through the connecting pin.
Alternatively, the pin head may oscillate in a first radial direction of the body, the connecting pin extending in a second radial direction of the body, the first radial direction being perpendicular to the second radial direction.
Optionally, a first bending part is arranged at the distal end side of the first expansion-stopping sheet, a second bending part is arranged at the proximal end side of the second expansion-stopping sheet, an accommodating space for accommodating the connecting pin is formed by the first bending part and the second bending part, and the volume of the accommodating space changes when the nail head swings relative to the axial direction of the body.
Optionally, the first bending part is provided with at least one first hollow part, the second bending part is provided with at least one second hollow part, and the first hollow part and the second hollow part are staggered, so that the first bending part and the second bending part are crossed to form the accommodating space.
Optionally, the first expansion-stopping piece includes a first connection portion located between a proximal end side and a distal end side of the first expansion-stopping piece, and the first hollowed-out portion extends from the first connection portion to the first bending portion.
Optionally, the second expansion-stopping sheet includes a second connection portion located between a proximal end side and a distal end side of the second expansion-stopping sheet, and the second hollowed-out portion extends from the second connection portion to the second bending portion.
Optionally, when the pin head extends in the axial direction of the body, a length of the accommodating space in the axial direction of the body is greater than a length of the connecting pin in the axial direction of the body.
Optionally, when the nail head swings relative to the axial direction of the body, the length of the accommodating space along the axial direction of the body changes.
Optionally, the first expansion-stopping piece includes a first connection portion located between a proximal end side and a distal end side of the first expansion-stopping piece, and a first stop portion is disposed at an end of the first bending portion, and the first stop portion bends toward the first connection portion.
Optionally, the second expansion-stopping piece includes a second connecting portion located between a proximal end side and a distal end side of the second expansion-stopping piece, and a second stop portion is disposed at an end of the second bending portion, and the second stop portion bends toward the second connecting portion.
Optionally, a magazine housing is provided at a proximal side of the body, and the proximal side of the first expansion stop piece is fixed to an inner wall of the magazine housing.
Optionally, a connector is provided on the proximal side of the staple head, and the distal side of the second expansion-stopping piece is fixed to the connector.
The embodiment of the invention also provides a medical anastomat, which comprises the driving mechanism.
The driving mechanism and the medical anastomat provided by the invention have the following advantages:
The invention provides a driving mechanism for a medical anastomat, which is characterized in that when a nail head swings relative to a body, a pushing piece is bent along with the swing of the nail head through the limiting and retaining function of a bulge-stopping component, and the bulge-stopping component is driven by the nail head to bend towards the same direction, so that the pushing piece is limited by the bulge-stopping component and cannot generate excessive deformation, and the deformation amount of the pushing piece is effectively limited. Further, in the case that the pushing member is formed by stacking a plurality of push blades, the plurality of push blades do not spread outward when the pushing member is bent due to the limited holding function of the expansion prevention assembly, thereby improving the operation effect.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.
FIG. 1 is a schematic view of a magazine housing mated with a connector in accordance with one embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic view of a pusher blade according to an embodiment of the present invention;
FIG. 4 is a perspective view of a drive mechanism according to an embodiment of the present invention mated with a magazine housing and connector;
FIG. 5 is a front view of a drive mechanism according to an embodiment of the present invention mated with a magazine housing and connector;
FIG. 6 is a front view of an expansion stop assembly according to an embodiment of the present invention mated with a magazine housing and connector;
FIG. 7 is a schematic view of a driving mechanism according to an embodiment of the present invention;
FIG. 8 is a perspective view of a drive mechanism with two expansion stop assemblies engaged with a magazine housing and a connector in accordance with one embodiment of the present invention;
FIG. 9 is a front view of a drive mechanism with two expansion stop assemblies engaged with a magazine housing and a connector in accordance with one embodiment of the present invention;
FIG. 10 is a schematic view of a driving mechanism with two expansion-preventing assemblies according to an embodiment of the present invention;
FIGS. 11 and 12 are perspective views of an anti-inflation assembly according to one embodiment of the present invention;
FIG. 13 is an exploded view of an anti-inflation assembly according to one embodiment of the present invention;
FIG. 14 is a front view of an anti-inflation assembly according to one embodiment of the present invention;
FIGS. 15 and 16 are schematic views of two alternative ways of the expansion stop assembly of the present invention;
Fig. 17 and 18 are schematic views showing a variation of the driving mechanism according to an embodiment of the present invention;
Fig. 19 and 20 are schematic views showing a variation of the driving mechanism provided with two expansion-preventing assemblies according to an embodiment of the present invention.
Reference numerals:
1. first hollowed-out part of nail box shell 44
11. First connecting portion of first clamping groove 45
2. Second expansion-stopping piece of connecting piece 5
21. Second bending part of second clamping groove 51
3. Fourth bending part of cutter pushing rod 52
31. Distal side 53 second stop of pusher bar
32. Second hollowed-out part of push blade 54
4. Second connecting part of first expansion-stopping sheet 55
41. First bending part 6 connecting pin
42. The third bending part 7 is accommodated in the space
43. First stop part
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
In order to solve the technical problems in the prior art, the invention provides a driving assembly and a medical anastomat comprising the driving assembly. The anastomat comprises a body and a nail head part positioned at the distal end side of the body, wherein the driving mechanism comprises a pushing piece and at least one expansion stopping component, the pushing piece extends into the nail head part from the body along the axial direction of the body, and the expansion stopping component is used for limiting bending deformation of the pushing piece to a certain extent. Specifically, the expansion stopping component is arranged on one side of the pushing piece, the expansion stopping component comprises a first expansion stopping sheet and a second expansion stopping sheet, the proximal side of the first expansion stopping sheet is connected with the body, the distal side of the first expansion stopping sheet is rotatably connected with the proximal side of the second expansion stopping sheet, and the distal side of the second expansion stopping sheet is connected with the nail head.
When the nail head is in an initial state, the nail head extends along the axial direction of the body, when the nail head swings along the radial direction of the body relative to the axial direction of the body, the pushing piece swings along with the nail head, so that the pushing piece bends, meanwhile, the nail head drives the second expansion stopping piece to rotate relative to the first expansion stopping piece, and the expansion stopping assembly also generates bending deformation in the same bending direction as the pushing piece, so that the deformation of the pushing piece is limited, the excessive deformation of the pushing piece is avoided, and the operation effect is improved.
The structure of the driving mechanism in one embodiment will be described in detail with reference to fig. 1 to 18. It will be appreciated that this embodiment is by way of example only and is not intended as a limitation on the scope of the invention.
As shown in fig. 1 to 4, in this embodiment, the stapler includes a body and a stapling head. The distal side of the body is fitted with a magazine housing 1, and the proximal side of the head is secured with a connector 2. Here, for clarity of illustration of the individual components, in fig. 1 and 2, the lower half of the magazine housing 1 is omitted from the view in the drawing, and in fig. 4, a part of the magazine housing 1 is further omitted with respect to fig. 1 and 2. The driving mechanism comprises a pushing piece and an expansion stopping assembly used for limiting the deformation amount of the pushing piece. In this embodiment, the pusher is a push rod 3 for driving the head to perform the stapling and cutting action. The proximal end side of the push rod 3 is located in the body, and the push rod 3 extends into the nail head part along the axial direction of the body. In this embodiment, as shown in fig. 3 and 4, the push rod 3 is sequentially stacked by a plurality of push blades 32 along the first radial direction of the anastomat, but the present invention is not limited thereto, and in other alternative embodiments, the push rod 3 may be an integrally formed piece, or other structures are all within the scope of the present invention.
In the present invention, the distal end side and the proximal end side are the proximal end side with respect to the operator, and the end closer to the operator, that is, the end closer to the surgical site is the distal end side. For example, in the view of fig. 5 and 6, along the axial direction S1 of the magazine housing 1, the left side is the proximal side, the right side is the distal side, that is, the right side of the push rod 3 is the distal side 31 of the push rod 3, the left side of the first expansion stop piece 4 is the proximal side provided with the third bending portion 42, the right side is the distal side provided with the first bending portion 41, the left side of the second expansion stop piece 5 is the proximal side provided with the second bending portion 51, and the right side is the distal side provided with the fourth bending portion 52. In the present invention, the inner side and the outer side are the inner side with respect to the axis of the body of the stapler, and the outer side away from the axis.
As shown in fig. 4 to 7, the expansion-stopping component includes a first expansion-stopping sheet 4 and a second expansion-stopping sheet 5, wherein a proximal side of the first expansion-stopping sheet 4 is connected to the magazine housing 1 of the body, a distal side of the first expansion-stopping sheet 4 is rotatably connected with a proximal side of the second expansion-stopping sheet 5, and a distal side of the second expansion-stopping sheet 5 is connected to the connecting piece 2 of the head of the magazine.
The axial direction of the body of the stapler, i.e. the axial direction of the magazine housing 1, is the S1 direction in fig. 5. To increase the selectable surgical operating angle, the staple head can be oscillated relative to the axial direction of the body. In particular, the staple head can oscillate along a first radial direction of the body. As shown in fig. 5, the first radial direction includes an upward direction of the S2 direction and a downward direction of the S3 direction, and the staple head can swing upward (in the S2 direction) and downward (in the S3 direction) in the first radial direction. In other alternative embodiments, the head may be arranged to be swingable only in the S2 direction, or may be arranged to be swingable only in the S3 direction, etc.
When the nail head is in an initial state, the nail head extends along the axial direction of the body, and at the moment, the push rod 3 also extends along the axial direction of the body. The extension direction of the first expansion stop piece 4 and the second expansion stop piece 5 is preferably substantially identical to the extension direction of the push rod 3 to maintain the initial state of the push rod 3, and at this time, the first expansion stop piece 4 and the second expansion stop piece 5 extend substantially in the axial direction of the body.
When the pin head swings in a first radial direction of the body relative to the axial direction of the body, the push rod 3 is bent. For example, in the initial state, the push rod 3 is also in the initial state, and the initial state refers to the unfired state of the stapler, that is, the push rod 3 does not move to the distal side. The distal end side 31 of the push rod 3 is bent upward with respect to the proximal end side when the head portion swings in the S2 direction, and the distal end side 31 of the push rod 3 is bent downward with respect to the proximal end side when the head portion swings in the S3 direction. Simultaneously, the nail head drives the second expansion stop piece 5 to rotate relative to the first expansion stop piece 4 through the connecting piece 2, so that the expansion stop component also generates bending deformation in the same bending direction as the pushing piece, and after the push rod 3 is bent, the expansion stop component still can be basically attached to the side surface of the push rod 3, so that the deformation of the push rod 3 is limited, and the push rod 3 is prevented from being excessively deformed. For example, when the nail head swings in the S2 direction, the second expansion stop piece 5 rotates upward relative to the first expansion stop piece 4, and when the nail head swings in the S3 direction, the second expansion stop piece 5 rotates downward relative to the first expansion stop piece 4. In this embodiment, since the push rod 3 is formed by stacking a plurality of push pin pieces 32, the expansion prevention unit can be maintained while the push rod 3 is bent, and the push pin pieces 32 do not expand toward the side where the expansion prevention unit is located.
As shown in fig. 5 and 6, the inner wall of the magazine housing 1 is provided with a first clamping groove 11, a third bending portion 42 is formed on the proximal end side of the first expansion stop piece 4, and the third bending portion 42 is inserted into the first clamping groove 11 to connect the first expansion stop piece 4 and the magazine housing 1. The connecting piece 2 is provided with a second clamping groove 21, a fourth bending part 52 is formed on the distal end side of the second expansion stop piece 5, and the fourth bending part 52 is inserted into the second clamping groove 21 to connect the second expansion stop piece 5 and the connecting piece 2. Only one way of securing the expansion-stop assembly to the body and the nail head is shown here, but in other alternative embodiments the connection of the first expansion-stop tab 4 to the magazine housing 1 may be by other means, such as a bolt, a pin fit, etc., and the connection of the second expansion-stop tab 5 to the connecting piece 2 may be by other means, such as a bolt, a pin fit, etc. In other alternative embodiments, the first expansion-stopping piece 4 may be connected to other parts of the body, the second expansion-stopping piece 5 may be connected to other parts of the nail head, and the like, which are all within the scope of the present invention. In a preferred embodiment, the third bending portion 42 is inserted into the first clamping groove 11 to be fixedly connected, and the fourth bending portion 52 is inserted into the second clamping groove 21 to be fixedly connected.
As shown in fig. 8 to 10, in order to further improve the limiting and holding effect on the push rod 3, the expansion-preventing components are respectively disposed on two sides of the push rod 3. The two expansion-preventing components are respectively arranged outside the two outermost push blades 32 of the push rod 3. When the push rod 3 bends along with the swinging motion of the nail head, expansion-stopping components which are bent and deformed similarly are arranged on two sides of the push rod 32, and the deformation quantity of the two sides of the push rod 32 is respectively limited. In embodiments where the push rod 3 includes a plurality of push blades 32 arranged in a stack, two expansion-preventing assemblies may limit the push blades 32 from expanding on either side of the push rod 32.
Fig. 11 to 14 show the structure of an expansion prevention assembly in this embodiment. In this embodiment, the expansion-stopping assembly further comprises a connecting pin 6 by means of which the first expansion-stopping piece 4 is rotatably connected to the second expansion-stopping piece 5. Specifically, the first expansion-stopping piece 4 may be fixed to the connecting pin 6, the second expansion-stopping piece 5 may be rotatably connected to the connecting pin 6, or the first expansion-stopping piece 4 may be rotatably connected to the connecting pin 6, the second expansion-stopping piece 5 may be fixed to the connecting pin 6, or both the first expansion-stopping piece 4 and the second expansion-stopping piece 5 may be rotatably connected to the connecting pin 6.
In this embodiment, the distal end side of the first expansion-stopping piece 4 is provided with a first bending portion 41, the proximal end side of the second expansion-stopping piece 5 is provided with a second bending portion 51, and the interiors of the first bending portion 41 and the second bending portion 51 together form an accommodating space 7 for accommodating the connecting pin 6. When the nail head swings relative to the axial direction of the body, the volume of the accommodating space 7 changes accordingly. In other alternative embodiments, the connection between the first expansion-stopping piece 4 and the second expansion-stopping piece 5 and the connecting pin 6 may be implemented in other manners, for example, a pin hole is formed in the first expansion-stopping piece 4, or a pin hole is formed in the second expansion-stopping piece 5.
As shown in fig. 13, the connecting pin 6 preferably extends along a second radial direction S4 of the body, the first radial direction and the second radial direction S4 being perpendicular. The invention is not limited thereto but in other alternative embodiments the connecting pin 6 may extend in other directions. In this embodiment, the connecting pin 6 is a cylindrical pin. In other alternative embodiments, the connecting pin 6 may be a connecting pin having a rectangular cross section, an elliptical pin, a flat cylindrical pin, or the like. When the connecting pin 6 is a flat cylindrical pin, the flat cylindrical pin may extend along the axial direction S1 of the body, and the proximal end face and the distal end face of the flat cylindrical pin are adapted to the shape of the accommodating space.
As shown in fig. 11, in this embodiment, the first bending portion 41 is provided with at least one first hollow portion 44, the second bending portion 51 is provided with at least one second hollow portion 54, and the first hollow portion 44 and the second hollow portion 54 are staggered, so that the first bending portion 41 and the second bending portion 51 intersect to form the accommodating space 7. By adopting the structural arrangement, the first bending portion 41 and the second bending portion 51 are respectively equivalent to a claw-shaped structure, and the connecting pins 6 are surrounded in a staggered manner, so that a relatively stable connection relationship between the first expansion-stopping sheet 4 and the second expansion-stopping sheet 5 and the connecting pins 6 can be realized.
In an alternative embodiment shown in fig. 15, the first bending portion 41 'and the second bending portion 51' may also be configured to be solid structures that do not include a hollowed-out structure. The expansion-stopping assembly comprises a first expansion-stopping sheet 4', a second expansion-stopping sheet 5' and a connecting pin 6'. The first bending part surrounds the front section of the connecting pin 6, the second bending part 41 'surrounds the rear section of the connecting pin 6, i.e. the first bending part 41' and the second bending part 51 'do not cross each other, but surround different parts of the connecting pin 6, respectively, similarly, it is also possible that the first bending part surrounds the rear section of the connecting pin 6' and the second bending part surrounds the front section of the connecting pin 6. Here the front and rear sections of the connecting pin 6' are divided along the axial direction S4 of the connecting pin 6.
In an alternative embodiment shown in fig. 16, the first bending portion 41 "and the second bending portion 51" may be configured to be solid structures that do not include a hollowed-out structure. The expansion-stopping assembly comprises a first expansion-stopping sheet 4 ', a second expansion-stopping sheet 5' and a connecting pin 6 '. In the initial state, the first expansion-stopping piece 4 "is located above the connecting pin 6, the second expansion-stopping piece 5" is located below the connecting pin 6", and the first bending portion 41" and the second bending portion 51 "respectively surround the connecting pin 6" from the upper direction and the lower direction.
When first kink and second kink set up to solid structure, compare in first kink and second kink that adopts hollow out construction, can prevent better that first kink and second kink from producing deformation when pin fin pendulum head.
As shown in fig. 13, the first expansion-stopping sheet 4 includes a first connecting portion 45 located between a proximal end side and a distal end side of the first expansion-stopping sheet 4, and the first hollowed-out portion 44 extends from the first connecting portion 45 to the first bending portion 41. In the initial state, that is, when the head portion is not swung, the first hollow portion 44 in the first connecting portion 45 preferably extends along the axial direction S1 of the body, but the present invention is not limited thereto. The second expansion-stopping sheet 5 includes a second connection portion 55 located between the proximal end side and the distal end side of the second expansion-stopping sheet 5, and the second hollowed-out portion 54 extends from the second connection portion 55 to the second bending portion 51. In the initial state, that is, when the head portion is not swung, the second hollow portion 54 in the second connecting portion 55 preferably extends along the axial direction S1 of the body, but the present invention is not limited thereto.
As shown in fig. 12 and 13, in order to further improve the stability of the connection pin 6 in the accommodating space 7, the connection pin 6 is prevented from falling out from the proximal end side or the distal end side of the accommodating space 7, the end of the first bending portion 41 is provided with a first stopper portion 43, the first stopper portion 43 is bent toward the first connecting portion 45 to partially close the proximal end side of the accommodating space 7, the end of the second bending portion 51 is provided with a second stopper portion 53, and the second stopper portion 53 is bent toward the second connecting portion 55 to partially close the distal end side of the accommodating space 7. Preferably, the first stop portion 43 and the second stop portion 53 are not hollow structures, so as to increase strength.
The receiving space 7 is preferably a telescopic space. When the nail head extends in the axial direction of the body, the length of the accommodating space 7 in the axial direction of the body is longer than the length of the connecting pin in the axial direction of the body. At this time, the difference between the length of the accommodating space 7 along the axial direction of the body and the length of the connecting pin along the axial direction of the body is preferably 0.8mm to 5mm, but the present invention is not limited thereto, and in other alternative embodiments, other values outside this range may be adopted. When the nail head swings relative to the axial direction of the body, the length of the accommodating space 7 along the axial direction of the body changes.
Fig. 17 and 18 show the change of the driving mechanism when the nail head swings in the S3 direction and the S2 direction, respectively. As shown in fig. 19 and 20, the state of the driving mechanism is further shown when the head part swings in the S3 direction and the S2 direction when the expansion-preventing assemblies are provided on both sides of the push rod 3. As can be seen from fig. 17 to 20, in the process of swinging the nail head, the expansion-stopping component is deformed in accordance with the bending direction of the push rod 3 due to the rotation of the second expansion-stopping piece 5, so that the expansion-stopping component is basically attached to the side surface of the push rod 3, the deformation amount of the push rod 3 is limited, and the excessive deformation of the push rod 3 is avoided. In the deformation process of the expansion-stopping component, the volume of the accommodating space 7 can change along with the change of the bending angle of the expansion-stopping component, so that the first expansion-stopping sheet 4, the second expansion-stopping sheet 5 and the connecting pin 6 are prevented from being hard-connected to generate rotary clamping, and the bending deformation of the expansion-stopping component is smoother.
The driving mechanism and the medical anastomat provided by the invention have the following advantages:
The invention provides a driving mechanism for a medical anastomat, which is characterized in that when a nail head swings relative to a body, a pushing piece is bent along with the swing of the nail head through the limiting and retaining function of a bulge-stopping component, and the bulge-stopping component is driven by the nail head to bend towards the same direction, so that the pushing piece is limited by the bulge-stopping component and cannot generate excessive deformation, and the deformation amount of the pushing piece is effectively limited. Further, in the case that the pushing member is formed by stacking a plurality of push blades, the plurality of push blades do not spread outward when the pushing member is bent due to the limited holding function of the expansion prevention assembly, thereby improving the operation effect.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.