Disclosure of Invention
Based on this, there is a need to overcome the drawbacks of the prior art by providing a suturing device that shortens the recovery time and reduces the risk after surgery.
A suturing device, the suturing device comprising:
An outer sleeve, a window for allowing target tissue to enter is arranged on the side wall of the distal end of the outer sleeve, the window is communicated with an inner cavity of the outer sleeve, the inner cavity is also used for communicating a negative pressure source, and
And the suture mechanism is arranged in the outer sleeve and is used for suturing target tissues sucked into the window.
In one embodiment, the suture mechanism includes:
The puncture member is arranged in the outer sleeve, a threading hole is arranged on the puncture member, the puncture member can move to the far end for needle feeding or the near end for needle withdrawing, and
The thread hooking piece is movably arranged in the outer sleeve, the movable position of the thread hooking piece comprises a thread hooking position and a thread loosening position, the thread hooking piece is used for moving to the thread hooking position to hook a suture thread when the puncture piece withdraws a needle, and the thread hooking piece is also used for moving to the thread loosening position to loosen the suture thread when the puncture piece advances the needle.
In one embodiment, the suturing device further comprises a first push-pull member, wherein the first push-pull member is movably arranged in the outer sleeve and is in transmission connection with the thread hooking member, and the first push-pull member can drive the thread hooking member to reciprocate in the axial direction Z of the outer sleeve to reciprocate to the thread hooking position and the thread loosening position.
In one embodiment, the thread hooking member is swingably disposed at a distal end of the outer sleeve, a sliding groove is disposed on the first push-pull member, the thread hooking member has a sliding portion slidably disposed in the sliding groove, and the first push-pull member can reciprocate along an axial direction of the outer sleeve to drive the thread hooking member to reciprocate between the thread hooking position and the thread releasing position.
In one embodiment, the suture mechanism further comprises a second push-pull member movably disposed through the outer sleeve, and the penetrating member is disposed distally of the second push-pull member.
In one embodiment, the first push-pull member comprises a first push rod slidably engaged with the inner wall of the outer sleeve in the axial direction Z, and/or the second push-pull member comprises a second push rod slidably engaged with the inner wall of the outer sleeve in the axial direction Z.
In one embodiment, the first plunger is driven by the second plunger to cause the hooking member to be driven by the piercing member, or the second plunger is driven by the first plunger to cause the piercing needle to be driven by the hooking member.
In one embodiment, the suturing device further comprises a housing coupled to the outer sleeve;
The suture mechanism further comprises a first elastic piece and a second elastic piece which are arranged in the shell;
The first push-pull piece further comprises a first connecting seat connected with the first push rod, and the first connecting seat is arranged outside the outer sleeve and is movably arranged inside the shell along the axial direction Z;
The second push-pull piece further comprises a second connecting seat connected with the second push rod, and the second connecting seat is arranged outside the outer sleeve and is movably arranged inside the shell along the axial direction Z;
The second connecting seat is provided with a first abutting portion and a second abutting portion which are sequentially arranged along the needle inserting direction, the first connecting seat is provided with a third abutting portion which is located between the first abutting portion and the second abutting portion, the third abutting portion is respectively in abutting fit with the first abutting portion and the second abutting portion and can move back and forth along the axial direction Z in the interval area between the first abutting portion and the second abutting portion, the third abutting portion is in abutting connection with the second abutting portion through the first elastic piece, and the first abutting portion is in abutting connection with the third abutting portion through the second elastic piece.
In one embodiment, the suture mechanism further comprises a third elastic piece arranged in the shell, the second push-pull piece further comprises a moving seat which is connected with the second connecting seat and is movably arranged in the shell along the axial direction Z, the moving seat is used for being connected with a power source, the moving seat is provided with a fourth abutting portion, the inner wall of the shell is provided with a fifth abutting portion, and the fourth abutting portion is abutted with the fifth abutting portion through the third elastic piece.
In one embodiment, the first connecting seat is provided with a first travel groove extending along an axial direction Z, the inner wall of the shell is provided with a first limit part, the first limit part is movably arranged in the first travel groove along the axial direction Z, and/or the second connecting seat is provided with a second travel groove extending along the axial direction Z, the inner wall of the shell is provided with a second limit part, and the second limit part is movably arranged in the second travel groove along the axial direction Z.
In one embodiment, the suturing device further comprises a suction member for connection to the source of negative pressure, the suction member being disposed through the interior of the outer sleeve and through the interior of the housing.
In one embodiment, the first push rod and/or the first connecting seat are/is also in sliding fit with the outer wall of the suction pipe fitting along the axial direction Z, and the second push rod and/or the second connecting seat are/is in sliding fit with the outer wall of the suction pipe fitting along the axial direction Z.
In one embodiment, the suturing device further comprises a reel for unreeling the suture.
In one embodiment, the suturing device further comprises a suction piece connected to the negative pressure source, the suction piece is arranged in the outer sleeve in a penetrating mode, and the distal end of the suction piece extends to the side of the window.
When the suturing device is used for suturing a sampling channel, for example, the suturing device stretches into a preset position in the sampling channel, target tissue on one side wall of the sampling channel is adsorbed, and the adsorbed target tissue protrudes out of the inner wall of the sampling channel, so that the suturing mechanism can suture the target tissue sucked into the window conveniently. Therefore, the binding and pressing mode in the related technology is not needed, so that the recovery time can be shortened, and the postoperative risk is reduced.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application 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 application. The present application 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 application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be still noted that, the proximal end refers to the end of the instrument or component that is close to the operator, the distal end refers to the end of the instrument or component that is far away from the operator, the axial direction refers to the direction parallel to the line connecting the distal end and the center of the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction.
Referring to fig. 1 to 8, fig. 1 is a block diagram showing a suture device in a needle withdrawing state according to an embodiment of the present application. Fig. 2 to 4 show enlarged structural views of fig. 1 at a, B and C, respectively. FIG. 5 is a block diagram showing a suturing device in a needle advanced state in accordance with one embodiment of the present application. Fig. 6 to 8 show enlarged structural views of fig. 1 at D, E and F, respectively. An embodiment of the present application provides a suturing device comprising an outer sleeve 10 and a suturing mechanism. The distal side wall of the outer cannula 10 is provided with a window 11 for the entry of the target tissue 93, the window 11 being in communication with an internal cavity of the outer cannula 10, which internal cavity is also for communication with a source of negative pressure. The suture mechanism is disposed within the outer sleeve 10 for suturing the target tissue 93 drawn into the window 11.
In the above-mentioned suturing device, when the suturing operation is performed on, for example, the sampling channel, the suturing device extends into a predetermined portion inside the sampling channel, adsorbs the target tissue 93 on one side wall of the sampling channel, and the adsorbed target tissue 93 protrudes from the inner wall of the sampling channel, so that the suturing mechanism performs the suturing operation on the target tissue 93 sucked into the window 11. Therefore, the binding and pressing mode in the related technology is not needed, so that the recovery time can be shortened, and the postoperative risk is reduced.
Referring to fig. 9-13, in some embodiments, the suture mechanism includes a piercing member 20 and a thread hooking member 30. The puncture member 20 is disposed in the outer sleeve 10, and the puncture member 20 is provided with a threading hole 21, so that a suture thread can be threaded through the threading hole 21. In addition, the penetrating member 20 may be movable distally into and proximally out of the needle. The thread hooking member 30 is movably disposed in the outer sleeve 10, and the movable position of the thread hooking member 30 includes a thread hooking position shown in fig. 9, 11 and 13 and a thread releasing position shown in fig. 10 and 12. The thread hooking member 30 is configured to move to the thread hooking position to hook the suture thread when the puncture member 20 is withdrawn, as shown in fig. 10 to 11 or fig. 12 to 13, and the thread hooking member 30 is also configured to move to the thread releasing position to release the suture thread when the puncture member 20 is inserted, as shown in fig. 11 to 12.
Specifically, performing a suturing operation on, for example, a sampling channel, includes the steps of:
step S110, the stitching device stretches into a preset position in the sampling channel, at this time, the puncture member 20 is at the needle withdrawing position, and the thread hooking member 30 is at the thread hooking position, as shown in FIG. 9;
Step S120, the negative pressure source generates negative pressure to adsorb the target tissue 93 on one side wall of the sampling channel, the adsorbed target tissue 93 protrudes out of the inner wall of the sampling channel, the puncture member 20 is driven to act to make the suture thread pass through the target tissue 93, and meanwhile, the thread hooking member 30 is moved from the thread hooking position to the thread loosening position, so that interference between the thread hooking member 30 and the puncture member 20 is avoided, as shown in FIG. 10;
Step S130, the puncture member 20 is withdrawn, and the thread hooking member 30 is moved from the thread releasing position to the thread hooking position, so that the suture thread passing through the target tissue 93 can be hooked smoothly in the process of moving to the thread hooking position, as shown in FIG. 11;
In step S140, the suturing device may be integrally rotated by a certain angle to make the window 11 face other parts of the sampling channel, and maintain the position unchanged, when the suturing device needs to be rotated to other positions, the negative pressure source is first made to release negative pressure to avoid interference with the target tissue 93 in the rotation process, and specifically, the suturing device is rotated to 180 ° for example to be expanded and introduced, the negative pressure source adsorbs the target tissue 93 on the other opposite side wall of the sampling channel, and the adsorbed target tissue 93 protrudes from the inner wall of the sampling channel, so as to drive the puncture member 20 to act to make the suture thread pass through the target tissue 93, and simultaneously make the thread hooking member 30 move from the thread hooking position to the thread loosening position to avoid interference between the thread hooking member 30 and the puncture member 20, as shown in fig. 12;
Step S150, the puncture member 20 is withdrawn, and the thread hooking member 30 is moved from the thread releasing position to the thread hooking position, so that the suture thread passing through the puncture member 20 of the target tissue 93 can be hooked smoothly in the process of moving to the thread hooking position, and the suture thread hooked by the thread hooking member 30 passes through the suture thread passing through the target tissue 93 as shown in step S130, particularly as shown in fig. 13.
In addition to the previous embodiments, the suturing device further comprises a first push-pull member 40. The first push-pull member 40 is movably disposed in the outer sleeve 10 and is in transmission connection with the thread hooking member 30, and the first push-pull member 40 can reciprocate along the axial direction Z of the outer sleeve 10 to drive the thread hooking member 30 to reciprocate between the thread hooking position and the thread loosening position.
Specifically, the wire hooking member 30 is swingably provided at the distal end of the outer sleeve 10. The first push-pull member 40 is provided with a sliding groove 431, the thread hooking member 30 has a sliding portion 31 slidably disposed in the sliding groove 431, and the first push-pull member 40 can reciprocate along the axial direction of the outer sleeve 10 to drive the thread hooking member 30 to reciprocate between the thread hooking position and the thread releasing position. In this way, when the first push-pull member 40 reciprocates along the axial direction of the outer sleeve 10, the sliding portion 31 moves along the sliding groove 431 correspondingly, so as to drive the thread hooking member 30 to reciprocate between the thread hooking position and the thread releasing position. And further, the whole structure is compact, and the occupied space is small.
Referring to fig. 9-13, in some embodiments, the suture mechanism further includes a second push-pull member 50, wherein the second push-pull member 50 is movably disposed through the outer sleeve 10. The piercing member 20 is disposed at the distal end of the second push-pull member 50. Specifically, in the process that the second push-pull member 50 drives the puncture member 20 to withdraw the needle, the first push-pull member 40 synchronously drives the thread hooking member 30 to hook the suture thread passing through the target tissue 93 to prevent the suture thread from withdrawing from the target tissue 93 along with the puncture member 20, in addition, in the process that the second push-pull member 50 drives the puncture member 20 to puncture the target tissue 93 again, the first push-pull member 40 synchronously drives the thread hooking member 30 to act so as to release the last hooked suture thread, thus the thread hooking member 30 cannot interfere with the puncture member 20 in the needle inserting state, the puncture member 20 can drive the suture thread to smoothly complete the puncture operation and enter the last threading coil, and in the process that the puncture member 20 drives the suture thread to withdraw from the target tissue 93 again, the first push-pull member 40 synchronously drives the thread hooking member 30 to hook the suture thread passing through the target tissue 93 again to prevent the suture thread from withdrawing from the target tissue 93 along with the puncture member 20. Thus, the suture work of the target tissue 93 can be conveniently completed under the cooperation of the thread hooking member 30. In addition, the second push-pull member 50 and the first push-pull member 40 are movably arranged inside the outer sleeve 10 in a penetrating manner, so that the second push-pull member and the first push-pull member enter the sampling channel together with the outer sleeve 10, and negative pressure is generated by a negative pressure source communicated with the inner cavity of the outer sleeve 10 to suck the target tissue 93 into the outer sleeve 10, so that the suturing operation of the target tissue 93 can be realized, and therefore, the second push-pull member 50 and the first push-pull member 40 cannot be directly contacted with the inner wall of the sampling channel, and collision friction damage to the inner wall tissue of the sampling channel can be reduced.
In one embodiment, the first push-pull member 40 comprises a first push rod 41 that is in sliding engagement with the inner wall of the outer sleeve 10 in the axial direction Z. Further, the second push-pull member 50 includes a second push rod 51 slidably fitted with the inner wall of the outer sleeve 10 in the axial direction Z. Thus, during the suturing operation, the first push rod 41 slides on the inner wall of the outer sleeve 10 along the axial direction Z, and the second push rod 51 slides on the inner wall of the outer sleeve 10 along the axial direction Z, so that the stability of the movement is high, and the suturing operation is facilitated.
In order to prevent the first push rod 41 and the second push rod 51 from moving along the circumferential direction of the outer sleeve 10, optionally, a first sliding groove is formed on the inner wall of the outer sleeve 10 along the axial direction Z, and a first sliding block slidably disposed on the first sliding groove is disposed on the first push rod 41. Thus, the first sliding block moves along the first sliding groove, plays a role in guiding the movement of the second push-pull member 50, and can prevent the second push-pull member 50 from rotating inside the outer sleeve 10. Similarly, a second sliding groove is formed on the inner wall of the outer sleeve 10 along the axial direction Z, and a second sliding block slidably disposed on the second sliding groove is disposed on the second push rod 51. The second sliding block moves along the second sliding groove, plays a role in guiding the movement of the first push-pull member 40, and can prevent the first push-pull member 40 from rotating inside the outer sleeve 10.
In some embodiments, the first push rod 41 is driven by the second push rod 51, so that the thread hooking member 30 is driven by the puncture member 20, and thus the puncture member 20 can synchronously withdraw or insert the needle when the thread hooking member 30 performs the thread hooking or releasing operation, so that when the suture is performed, only the axial sliding power for the movement of the second push rod 51 is provided, and both the thread hooking member 30 and the puncture member 20 can move along with the movement, which is beneficial to simplifying the suture operation. Of course, in some alternatives, the second push rod 51 may also be driven by the first push rod 41 to drive the puncture needle from the thread hooking member 30.
Referring to fig. 3 and 7, in one embodiment, the suturing device further comprises a housing 70 coupled to the outer sleeve 10. Optionally, the suturing device further comprises a first mount 91 mounted inside the housing 70. The proximal end of the outer cannula 10 is fixedly attached to the first mount 91. In this way, the outer sleeve 10 can be stably coupled to the housing 70.
In addition, the first push-pull member 40 further includes a first connection seat 42 connected to the first push rod 41. The first connection seat 42 is disposed outside the outer sleeve 10 and is disposed inside the housing 70 movably in the axial direction Z. Likewise, the second push-pull member 50 further includes a second connection seat 52 connected to the second push rod 51. The second connecting seat 52 is disposed outside the outer sleeve 10 and is disposed inside the housing 70 movably in the axial direction Z.
Referring to fig. 2 and 6, in one embodiment, the suturing device further includes a first elastic member 81 disposed inside the housing 70. The second connecting base 52 is provided with a first abutting portion 521 and a second abutting portion 522 which are sequentially provided in the needle insertion direction. The first connecting seat 42 is provided with a third contact portion 421 located between the first contact portion 521 and the second contact portion 522. The third contact portion 421 is in contact engagement with the first contact portion 521 and the second contact portion 522, respectively, and is movable back and forth in the axial direction Z in the interval region between the first contact portion 521 and the second contact portion 522, and the third contact portion 421 is in contact with the second contact portion 522 by the first elastic member 81. Thus, when the second connecting seat 52 is driven to move in the axial direction Z, the first abutting portion 521 of the second connecting seat 52 abuts against the third abutting portion 421 to drive the third abutting portion 421 to move in the axial direction Z, the third abutting portion 421 compresses the first elastic member 81 and drives the first connecting seat 42 to move in the axial direction Z, so that on one hand, the puncturing action of the puncturing element 20 can be driven, and on the other hand, the thread hooking element 30 can be driven to move to the position of loosening the suture thread, so as to avoid interference to the puncturing action of the suture thread. In addition, when the second connecting seat 52 is driven to move along the axial direction Z to withdraw the needle, the first connecting seat 42 is driven to move along the axial direction Z under the action of the restoring force of the second elastic member 82, so that on one hand, the puncture member 20 can be driven to withdraw the needle, and on the other hand, the thread hooking member 30 can be driven to move to a position hooking the suture thread. In addition, the second connecting seat 52 is connected with the power source, and the first connecting seat 42 is not required to be connected with the power source, so that the structure is relatively simplified.
Referring to fig. 2 and 6, in one embodiment, the suturing device further includes a second elastic member 82 disposed inside the housing 70. The first contact portion 521 is in contact with the third contact portion 421 via the second elastic member 82. In this way, in the process of driving the second connecting seat 52 to move in the axial direction Z, the second connecting seat 52 drives the third abutting portion 421 to enable the first elastic member 81 to elastically compress to drive the first connecting seat 42 to move in the axial direction Z, the first connecting seat 42 drives the hooking member 30 to move from the position hooking the suture to the position releasing the suture through the second push rod 51, and the second elastic member 82 can continuously elastically compress when the position of the first connecting seat 42 is fixed, so that the second push-pull member 50 can continuously insert the needle in the axial direction Z relative to the first push-pull member 40, and thus the second push-pull member 50 can drive the puncture member 20 to insert the needle to complete the puncture action of the target tissue 93.
In one embodiment, the suturing device further comprises a third resilient member 83 disposed within the housing 70. The second push-pull member 50 further includes a moving seat 53 coupled to the second coupling seat 52 and disposed inside the housing 70 so as to be movable in the axial direction Z. The movable seat 53 is used for connecting with a power source, the movable seat 53 is provided with a fourth abutting portion 531, the inner wall of the housing 70 is provided with a fifth abutting portion 71, and the fourth abutting portion 531 abuts against the fifth abutting portion 71 through the third elastic member 83. Specifically, the power source includes, but is not limited to, a manual driving structure such as a manual pressing structure, a manual pushing and pulling structure, or a manual stirring structure, or an electric driving structure such as a motor screw, an air cylinder, or a hydraulic cylinder, so long as the movement of the movable seat 53 along the axial direction Z can be driven. In this embodiment, the power source specifically selects, for example, a manual driving structure, and the axial direction Z of the movable seat 53 is moved into the needle under the driving force of the manual driving structure, the third elastic member 83 is compressed, and when the manual driving structure is released, the movable seat 53 is driven to move and reset under the restoring force of the third elastic member 83.
In some embodiments, the first elastic member 81, the second elastic member 82 and the third elastic member 83 are respectively adjusted and configured according to practical requirements, including but not limited to a spring, an elastic strip or an elastic block, etc.
Referring to fig. 2 and 6, in some embodiments, the first elastic member 81 and the second elastic member 82 are springs, for example. In addition, the inner wall of the second connecting seat 52 is formed with a mounting groove 523, two opposite side walls of the mounting groove 523 along the axial direction Z are, for example, a first abutting portion 521 and a second abutting portion 522, respectively, the third abutting portion 421 extends into the mounting groove 523 and can move in the mounting groove 523 along the axial direction Z, and the first elastic member 81 and the second elastic member 82 are both disposed in the mounting groove 523.
In some embodiments, the fourth abutting portion 531 is disposed around the circumference of the movable seat 53, the fifth abutting portion 71 is disposed around the circumference of the inner wall of the housing 70, the third elastic member 83 is a spring, and opposite ends of the spring abut against the fifth abutting portion 71 respectively by the fourth abutting portion 531, and the third elastic member 83 can be compressed during the movement of the movable seat 53 along the axial direction Z relative to the housing under the driving of the power source. When the movable seat 53 is released, the movable seat 53 is reset by the driving of the third elastic member 83.
Referring to fig. 3 and 7, in one embodiment, the first connecting seat 42 is provided with a first travel groove 422 extending along an axial direction Z, the inner wall of the housing 70 is provided with a first limiting portion 72, and the first limiting portion 72 is movably disposed in the first travel groove 422 along the axial direction Z. In addition, the second connecting seat 52 is provided with a second travel groove 524 extending along the axial direction Z, the inner wall of the housing 70 is provided with a second limiting portion 73, and the second limiting portion 73 is movably disposed in the second travel groove 524 along the axial direction Z. In this way, the first limiting portion 72 moves in the first travel groove 422, and performs a limiting function on the movement travel of the first push-pull member 40 in the axial direction Z, so that the puncture member 20 moves within the preset travel range. Specifically, as shown in fig. 3 and fig. 4, when the first push-pull member 40 drives the hooking member 30 to move to the hooking position, the first limiting portion 72 abuts against one side wall of the first travel groove 422, and as shown in fig. 7 and fig. 8, when the first push-pull member 40 drives the hooking member 30 to move to the position for releasing the suture, the first limiting portion 72 abuts against the other side wall of the first travel groove 422.
Similarly, the second limiting portion 73 moves in the second travel groove 524 to limit the movement travel of the second push-pull member 50 along the axial direction Z, so that the thread hooking member 30 moves within the preset travel range. Specifically, as shown in fig. 7 and 8, when the second push-pull member 50 drives the puncture member 20 to advance to the limit position, the second limiting portion 73 abuts against one side wall of the second travel groove 524, and as shown in fig. 3 and 4, when the second push-pull member 50 drives the puncture member 20 to withdraw to the limit position, the second limiting portion 73 abuts against the other side wall of the second travel groove 524.
In some embodiments, the suturing device further includes a suction piece 60 for connecting with a negative pressure source, where the suction piece 60 may be disposed outside the outer sleeve 10 or penetrating inside the outer sleeve 10, and the specific setting position and the specific structural form are flexibly adjusted and set according to the actual requirement, so long as the negative pressure generated at the suction portion 61 can be achieved to suck the target tissue 93 into the window 11, so as to perform a corresponding suturing action on the target tissue 93. When the suction member 60 is inserted into the outer cannula 10, the suction portion 61 of the suction member 60 is disposed corresponding to the position of the window 11, for example, the distal end of the suction member 60, that is, the suction portion 61, extends to the side of the window 11, so that the target tissue 93 can be sucked into the window 11 when the suction member 60 generates negative pressure. In contrast, when the suction tool 60 is located outside the outer casing 10, for example, extending along the outer wall of the outer casing 10, the suction portion 61 of the suction tool 60 may extend into the outer casing 10 through the window 11 and be located corresponding to the window 11, or the outer casing 10 may be provided with a through hole, the suction portion 61 may be communicated with the through hole to generate negative pressure at the window 11 to suck the target tissue 93, or the suction portion 61 may extend into the outer casing 10 through the outer casing 10 to generate negative pressure at the window 11 to suck the target tissue 93.
In this embodiment, in order to minimize the damage of the suction tool 60 to the tissue during the operation, such as collision and friction, the suction tool 60 is specifically deployed by being inserted into the outer sleeve 10, but not limited thereto.
Referring to fig. 1 to 4, in one embodiment, the suction member 60 is disposed through the outer sleeve 10 and the housing 70. Suction piece 60 includes, but is not limited to, a suction tube. Therefore, the whole layout is compact, the size of the device is smaller, and the damage to tissues is small.
In some embodiments, the proximal end of the suction tube is provided with a connection tube 92, for example a hose, the connection tube 92 being intended to be connected to a negative pressure device.
In some embodiments, the suturing device further comprises a reel. The reel is used for unreeling the suture. Specifically, the reel is provided on the housing 70, for example.
Referring to fig. 1 to 4, in some embodiments, the first push rod 41 not only abuts against the inner wall of the outer sleeve 10 and slidingly engages along the axial direction Z, but also abuts against the outer wall of the suction tube and slidingly engages along the axial direction Z, so that the first push rod 41 has better operation stability, compact overall structure and smaller size. In addition, the second connecting seat 52 not only abuts against the inner wall of the housing 70 and is slidably engaged with the axial direction Z, but also abuts against the outer wall of the suction pipe fitting and is slidably engaged with the axial direction Z, so that the operation stability of the second push-pull member 50 can be further improved. The movable seat 53 is slidably fitted to the outside of the suction tool 60, for example.
Similar to the arrangement mode that the second push-pull member 50 is respectively in sliding fit with the outer sleeve 10, the shell 70 and the suction pipe fitting, the first push-pull member 40 is correspondingly respectively in sliding fit with the outer sleeve 10, the shell 70 and the suction pipe fitting, so that the movement stability of the first push-pull member 40 is improved, and meanwhile, the whole structure of the device is compact, and the size is smaller. Specifically, the second push rod 51 is not only abutted with the inner wall of the outer sleeve 10 and slidingly matched with the inner wall along the axial direction Z, but also abutted with the outer wall of the suction pipe fitting and slidingly matched with the outer wall along the axial direction Z, so that the second push rod 51 has good running stability, compact overall structure and small volume size. In addition, the first connecting seat 42 not only abuts against the inner wall of the housing 70 and is slidably engaged with the axial direction Z, but also abuts against the outer wall of the suction pipe fitting and is slidably engaged with the axial direction Z, so that the operation stability of the first push-pull member 40 can be further improved.
In some embodiments, to improve the operation stability of the second push-pull member 50, the side wall of the second push-pull member 50 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the side wall of the second push-pull member 50 facing the suction pipe member is adapted to the shape of the outer wall of the suction pipe member, so that stable operation of the second push-pull member 50 in the axial direction Z can be achieved. Likewise, the side wall of the first push-pull member 40 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the side wall of the first push-pull member 40 facing the suction tube is adapted to the shape of the outer wall of the suction tube.
In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, if any, 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 application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, they may be fixedly connected, detachably connected or integrally formed, mechanically connected, electrically connected, directly connected or indirectly connected through an intermediate medium, and communicated between two elements or the interaction relationship between two elements unless clearly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through 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 if 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. If 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 as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
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.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. 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 application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.