Clip bin assembly and clip applier

Abstract

The utility model provides a clip bin assembly and a clip applier. The clip bin assembly comprises a transmission structure, a clip bin, a percussion structure, a percussion block, a clamp, a tube body, a first sleeve and a second sleeve. The tube body and the first sleeve are sequentially communicated from near to far, and the far end of the tube body is fixedly connected with the near end of the first sleeve; the second sleeve is slidably sleeved with the first sleeve, the near end of the second sleeve is fixedly connected with the percussion structure, and the far end of the second sleeve is fixedly connected with the percussion block; the transmission structure is contained in the tube body, the clamping bin is installed in the second sleeve and is fixed relative to the first sleeve or the tube body, and the clamp is installed at the far end of the clamping bin; the near end of the percussion structure is inserted into the tube body to be matched with the transmission structure so as to be driven by the transmission structure to move towards the far side, and the percussion block closes the clamp. When the device is matched with a puncture outfit for use, the clamping bin assembly does not retreat in the percussion process, and blood vessel traction is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a clamping assembly and an applicator. Background Technology

[0002] During surgical procedures, to fully expose the surgical field, it is necessary to ligate the blood vessels surrounding the target tissue to stop bleeding. Hemostasis has become one of the core basic surgical techniques. Almost every surgical procedure on any part of the human body involves bleeding and hemostasis, and generally, a clamping device is used to ligate and close the wound to stop the bleeding.

[0003] Currently used clip applicators generally include a handle and a clip assembly arranged from proximal to distal. The upper end of the handle forms an adapter, and the proximal end of the clip assembly is connected to the distal end of the adapter. The clip assembly includes a cannula extending in the proximal direction and a clamp located at the distal end of the cannula. The adapter can drive the cannula to move distally to compress the clamp and engage the ligation clip within the clamp.

[0004] When using a clip applicator in laparoscopic surgery, the cannula needs to be inserted into the trocar so that the distal end of the clip assembly (including the clamp) is inside the body to perform hemostasis on the blood vessel. The trocar is fixed to the patient's body, and the cannula is inserted into the trocar. There is a large frictional force between the cannula and the trocar, especially between the cannula and the one-way valve of the trocar used to maintain positive abdominal pressure. During the clip applicator firing (i.e., when the adapter drives the cannula distally), the large frictional force between the cannula and the trocar causes the clip body (including the clamp) to retract, causing relative movement between the cannula and the clip body. This can cause traction on the blood vessel when the ligation clip is applied, potentially tearing the blood vessel.

[0005] Therefore, there is an urgent need for an improved clamping assembly and clamping device. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the problems existing in the above-mentioned technology, the present invention provides solutions to at least some extent. Therefore, the present invention proposes a clamping assembly and a clamping device.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] In a first aspect, this utility model provides a clamping assembly, including a transmission structure, a clamping chamber, a firing structure, a firing block, a clamp, a tube body, a first sleeve, and a second sleeve; the tube body and the first sleeve are connected sequentially from near to far, and the far end of the tube body is fixedly connected to the near end of the first sleeve; the second sleeve is slidably sleeved inside the first sleeve, the near end of the second sleeve is fixedly connected to the firing structure, and the far end of the second sleeve is fixedly connected to the firing block; the transmission structure is housed inside the tube body, the clamping chamber is installed inside the second sleeve, and the clamping chamber is fixed relative to the first sleeve or the tube body; the clamp is installed at the far end of the clamping chamber; the near end of the firing structure is inserted into the tube body and cooperates with the transmission structure, so as to move distally driven by the transmission structure, causing the firing block to close the clamp.

[0011] Optionally, the first sleeve and the second sleeve are fitted with a clearance.

[0012] Optionally, a first annular stop is provided on the inner wall of the first sleeve along the circumference of the first sleeve; a second annular stop is provided on the outer wall of the second sleeve along the circumference of the second sleeve, the second annular stop being located near the first annular stop; the firing mechanism is in the firing position, the clamp is closed, and the near side of the first annular stop abuts against the far side of the second annular stop.

[0013] Optionally, the position of the clamp relative to the first sleeve or tube body is fixed.

[0014] Optionally, the distal end of the firing structure is inserted into the second sleeve, the proximal end of the firing block is inserted into the second sleeve, and the magazine is supported on the distal end of the firing structure and the proximal end of the firing block.

[0015] Optionally, the proximal ends of the first sleeve, the second sleeve, and the clamping chamber are all inserted into the tube body. A positioning pin perpendicular to the clamping chamber is provided in the tube body, and the two ends of the positioning pin are respectively connected to the two opposite tube walls of the tube body. A first positioning hole adapted to the cross-sectional shape of the positioning pin is opened at the proximal end of the first sleeve corresponding to the position of the positioning pin. A strip-shaped hole extending in the proximal direction is opened at the proximal end of the second sleeve corresponding to the position of the positioning pin. A second positioning hole adapted to the cross-sectional shape of the positioning pin is opened at the proximal end of the clamping chamber corresponding to the position of the positioning pin. The positioning pin is provided through the first positioning hole, the strip-shaped hole, and the second positioning hole.

[0016] Optionally, the proximal end of the first sleeve is inserted into the tube body and is interference-fitted with the tube body.

[0017] Optionally, a first annular stop is provided on the inner wall of the first sleeve along the circumference of the first sleeve; a second annular stop is provided on the outer wall of the second sleeve along the circumference of the second sleeve; a reset member is provided between the first annular stop and the second annular stop, the first end of the reset member is connected to the first annular stop, and the second end of the reset member is connected to the second annular stop; when the firing structure moves to the distal side, the reset member undergoes elastic deformation.

[0018] Optionally, the reset element is a spring sleeved on the outer wall of the second sleeve.

[0019] Secondly, this utility model provides a clamping device having the clamping chamber assembly described above.

[0020] (III) Beneficial Effects

[0021] The beneficial effects of this utility model are:

[0022] The clamping assembly and clamp applicator proposed in this utility model are used in laparoscopic surgery. The distal end of the clamping assembly is inserted into the trocar, and the outer wall of the first sleeve contacts the inner wall of the trocar. During firing, the transmission structure drives the firing structure, the second sleeve, and the firing block to move distally as a whole, so that the firing block squeezes the opposite sides of the clamp to fasten the ligation clip. Since the first sleeve and the second sleeve are slidably connected, the friction between the first sleeve and the second sleeve is small, and the clamping assembly will not retract during firing, thereby avoiding the ligation clip from pulling on the blood vessel and tearing it when fastening it. Attached Figure Description

[0023] This utility model is described with reference to the following drawings:

[0024] Figure 1 This is a cross-sectional schematic diagram of the clamp applicator according to Embodiment 1 of the present utility model, wherein the clamp is in the open state and the ligation clip in the clamp chamber is not inserted into the clamp.

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a schematic diagram showing the fit between the first and second sleeves;

[0027] Figure 4 This is a cross-sectional schematic diagram of the clamp applicator according to Embodiment 1 of the present utility model, wherein the clamp is in the open state and the ligation clip in the clamp chamber is inserted into the clamp.

[0028] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0029] Figure 6 This is a cross-sectional schematic diagram of the clamp applicator according to Embodiment 1 of the present utility model, wherein the clamp is in a closed state;

[0030] Figure 7 for Figure 6 Enlarged diagram of point C in the middle.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Transmission structure;

[0033] 2: Mid-section;

[0034] 3: Firing mechanism;

[0035] 4: Activation block;

[0036] 5: Clamping pliers;

[0037] 6: Pipe body;

[0038] 61: Positioning pin;

[0039] 7: First casing;

[0040] 71: First annular stop;

[0041] 8: Second casing;

[0042] 81: Second annular stop;

[0043] 91: handle; 92: trigger;

[0044] 10: Puncture instrument. Detailed Implementation

[0045] It should be noted that in this article, "near" refers to the side closer to the operator, and "far" refers to the side closer to the patient. The directional terms "upper," "lower," "front," "back," "left," and "right" used in this article are... Figure 1 Using the orientation as a reference, the direction from front to back is also the direction from far to near.

[0046] Example 1

[0047] like Figures 1 to 7 As shown, this embodiment provides a clamp applicator, which includes a clamping chamber assembly and a handle.

[0048] The clamping assembly includes a transmission structure 1, a clamping chamber 2, a clamping structure, a firing structure 3, a firing block 4, a clamp 5, a tube body 6, a first sleeve 7, and a second sleeve 8.

[0049] The tube body 6 and the first sleeve 7 are connected sequentially from near to far, and the far end of the tube body 6 is fixedly connected to the near end of the first sleeve 7. The tube body 6 can be the outer shell of the near end of the clamping assembly, or it can be a component inside the near end shell of the clamping assembly. The tube body 6 itself can be a single piece or a separate piece. One of the functions of the tube body 6 is to provide a limiting structure on its inner wall to limit the movement position of the moving parts.

[0050] The second sleeve 8 is slidably fitted inside the first sleeve 7. The proximal end of the second sleeve 8 is fixedly connected to the firing structure 3, and the distal end of the second sleeve 8 is fixedly connected to the firing block 4. The transmission structure 1 is housed within the tube body 6. The clamping chamber 2 is installed inside the second sleeve 8 and is fixed relative to the first sleeve 7 or the tube body 6. The distal end of the clamping delivery structure is inserted into the second sleeve 8, and the proximal end of the clamping delivery structure is inserted into the tube body 6 to cooperate with the transmission structure 1. When the transmission structure 1 moves distally, it can drive the clamping delivery structure to move distally to push the ligation clamp in the clamping chamber 2 into the clamp 5. When the transmission structure 1 moves proximally, it allows the clamping delivery structure to return to its initial state after pushing the ligation clamp. The clamp 5 is installed at the far end of the clamp chamber 2. The proximal end of the firing structure 3 is inserted into the tube body 6 and cooperates with the transmission structure 1. The transmission structure 1 moves to the far side, which can drive the firing structure 3, the second sleeve 8 and the firing block 4 to move to the far side as a whole, so that the firing block 4 squeezes the opposite sides of the clamp 5 to fasten and bind the clamp. The transmission structure 1 moves to the near side, allowing the firing structure 3, the second sleeve 8 and the firing block 4 to return to the initial state as a whole.

[0051] When the clamp assembly is used in laparoscopic surgery, the distal end of the clamp assembly is inserted into the trocar 10, and the outer wall of the first sleeve 7 contacts the inner wall of the trocar 10. During firing, the transmission structure 1 drives the firing structure 3, the second sleeve 8 and the firing block 4 to move distally as a whole, so that the firing block 4 squeezes the opposite sides of the clamp 5 to fasten the ligation clip. Since the first sleeve 7 and the second sleeve 8 are slidably connected, the friction between the first sleeve 7 and the second sleeve 8 is small, and the clamp assembly will not retract during firing, thereby avoiding the ligation clip from pulling on the blood vessel and tearing it when fastening the blood vessel.

[0052] Preferably, the position of the clamp 5 relative to the first sleeve 7 or the tube body 6 is fixed.

[0053] Preferably, the first sleeve 7 and the second sleeve 8 are clearance-fitted. This facilitates the sliding of the second sleeve 8 relative to the first sleeve 7, reducing the friction between the first sleeve 7 and the second sleeve 8.

[0054] Preferably, such as Figure 3 As shown, a first annular stop 71 is provided on the inner wall of the first sleeve 7 along the circumference of the first sleeve 7; a second annular stop 81 is provided on the outer wall of the second sleeve 8 along the circumference of the second sleeve 8, with the second annular stop 81 located near the first annular stop 71; the firing structure 3 can move between an initial position and a firing position arranged sequentially from near to far. When the firing structure 3 is in the firing position, the clamp 5 is fully closed, and the near side of the first annular stop 71 abuts against the far side of the second annular stop 81. Thus, through the mutual cooperation of the first annular stop 71 and the second annular stop 81, the stroke of the firing structure 3 can be limited, making firing safer.

[0055] Optionally, a limiting hole extending in the proximal direction is provided on the first sleeve 7, and a limiting post extending into the limiting hole is provided on the second sleeve 8; or, a limiting hole extending in the proximal direction is provided on the second sleeve 8, and a limiting post extending into the limiting hole is provided on the first sleeve 7; the firing structure 3 is located in the firing position, and the limiting post abuts against the distal wall of the limiting hole. In this way, through the cooperation of the limiting hole and the limiting post, the stroke of the firing structure 3 can also be limited, making firing safer.

[0056] Preferably, the distal end of the firing structure 3 is inserted into the second sleeve 8, the proximal end of the firing block 4 is inserted into the second sleeve 8, and the magazine 2 is supported on the distal end of the firing structure 3 and the proximal end of the firing block 4. This facilitates the stable installation of the magazine 2 within the second sleeve 8.

[0057] Preferably, the proximal ends of the first sleeve 7, the second sleeve 8, and the clamping chamber 2 are all inserted into the tube body 6. A positioning pin 61 perpendicular to the clamping chamber 2 is provided inside the tube body 6, with its two ends connected to opposite tube walls of the tube body 6. A first positioning hole, matching the cross-sectional shape of the positioning pin 61, is provided at the proximal end of the first sleeve 7 corresponding to the position of the positioning pin 61. A strip-shaped hole extending in the proximal direction is provided at the proximal end of the second sleeve 8 corresponding to the position of the positioning pin 61. A second positioning hole, matching the cross-sectional shape of the positioning pin 61, is provided at the proximal end of the clamping chamber 2 corresponding to the position of the positioning pin 61. The positioning pin 61 passes through the first positioning hole, the strip-shaped hole, and the second positioning hole. This design simplifies the structure and facilitates the fixed installation of the first sleeve 7 and the clamping chamber 2, as well as the sliding installation of the second sleeve 8.

[0058] More preferably, the proximal end of the first sleeve 7 is inserted into the tube body 6 and is interference-fitted with the tube body 6.

[0059] The handle includes a grip 91 and a trigger 92. The first end of the trigger 92 is rotatably mounted on the grip 91, and the second end of the trigger 92 is positioned away from the grip 91 to form a V-shaped opening. When the trigger 92 is squeezed, it rotates elastically, causing the second end of the trigger 92 to move closer to the grip 91, thus reducing the V-shaped opening. When the trigger 92 is released, it returns elastically, causing the second end of the trigger 92 to move away from the grip 91, thus increasing the V-shaped opening.

[0060] The trigger 92 is connected to the transmission structure 1. When the trigger 92 is gripped, the transmission structure 1 moves to the distal side in response to the actuation of the trigger 92, driving the clamping assembly to work. When the trigger 92 is released, the transmission structure 1 is allowed to automatically return to the initial state.

[0061] It should be noted that this embodiment is illustrated using a continuous-type manual clamp applicator as an example, and should not be construed as a limitation of this utility model. The improved solutions proposed in this utility model are also applicable to continuous-type automatic clamp applicators and single-type clamp applicators.

[0062] Example 2

[0063] The difference between this embodiment and Embodiment 1 is that:

[0064] A first annular stop is provided on the inner wall of the first sleeve along its circumference; a second annular stop is provided on the outer wall of the second sleeve along its circumference; a reset member is provided between the first and second annular stops, with its first end connected to the first annular stop and its second end connected to the second annular stop; when the firing structure moves distally, the reset member undergoes elastic deformation. Thus, when the transmission structure moves proximally, the elastic deformation of the reset member recovers, which helps to drive the firing structure back to its initial state. The reset member can be a spring, rubber component, etc.

[0065] Preferably, the reset element is a spring sleeved on the outer wall of the second sleeve.

[0066] The rest of the content is similar to that of Example 1, and will not be repeated here.

[0067] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0069] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0070] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A clamping assembly, characterized in that, It includes a transmission structure (1), a clamp (2), a firing structure (3), a firing block (4), a clamp (5), a tube body (6), a first sleeve (7), and a second sleeve (8); The tube body (6) and the first sleeve (7) are connected sequentially from near to far, and the far end of the tube body (6) is fixedly connected to the near end of the first sleeve (7); the second sleeve (8) is slidably sleeved inside the first sleeve (7), the near end of the second sleeve (8) is fixedly connected to the firing structure (3), and the far end of the second sleeve (8) is fixedly connected to the firing block (4); the transmission structure (1) is housed inside the tube body (6), the clamp (2) is installed inside the second sleeve (8), and the clamp (2) is fixed relative to the first sleeve (7) or the tube body (6), and the clamp (5) is installed at the far end of the clamp (2); The proximal end of the firing structure (3) is inserted into the tube body (6) and cooperates with the transmission structure (1) so that it is driven by the transmission structure (1) to move to the distal side, so that the firing block (4) closes the clamp (5). The distal end of the clamping assembly is inserted into the puncture device (10), and the outer wall of the first sleeve (7) contacts the inner wall of the puncture device (10).

2. The clamping assembly according to claim 1, characterized in that, The first sleeve (7) and the second sleeve (8) are fitted with a clearance.

3. The clamping assembly according to claim 1, characterized in that, A first annular stop (71) is provided on the inner wall of the first sleeve (7) along the circumference of the first sleeve (7); a second annular stop (81) is provided on the outer wall of the second sleeve (8) along the circumference of the second sleeve (8), and the second annular stop (81) is located near the first annular stop (71). The firing mechanism (3) is in the firing position, the clamp (5) is closed, and the proximal side of the first annular stop (71) abuts against the distal side of the second annular stop (81).

4. The clamping assembly according to claim 1, characterized in that, The position of the clamp (5) relative to the first sleeve (7) or the tube body (6) is fixed.

5. The clamping assembly according to claim 1, characterized in that, The distal end of the firing structure (3) is inserted into the second sleeve (8), the proximal end of the firing block (4) is inserted into the second sleeve (8), and the clamp (2) is supported on the distal end of the firing structure (3) and the proximal end of the firing block (4).

6. The clamping assembly according to claim 1, characterized in that, The proximal ends of the first sleeve (7), the second sleeve (8), and the clamping chamber (2) are all inserted into the tube body (6). A positioning pin (61) perpendicular to the clamping chamber (2) is provided inside the tube body (6). The two ends of the positioning pin (61) are respectively connected to the two opposite tube walls of the tube body (6). The first sleeve (7) has a first positioning hole at the proximal end corresponding to the position of the positioning pin (61) that matches the cross-sectional shape of the positioning pin (61). The second sleeve (8) has a strip hole at the proximal end corresponding to the position of the positioning pin (61) that extends in the proximal direction. The clamping chamber (2) has a second positioning hole at the proximal end corresponding to the position of the positioning pin (61) that matches the cross-sectional shape of the positioning pin (61). The positioning pin (61) is set through the first positioning hole, the strip hole and the second positioning hole.

7. The clamping assembly according to claim 6, characterized in that, The proximal end of the first sleeve (7) is inserted into the tube body (6) and is press-fitted with the tube body (6).

8. The clamping assembly according to claim 1, characterized in that, A first annular stop (71) is provided on the inner wall of the first sleeve (7) along the circumference of the first sleeve (7); a second annular stop (81) is provided on the outer wall of the second sleeve (8) along the circumference of the second sleeve (8). A reset member is provided between the first annular stop (71) and the second annular stop (81). The first end of the reset member is connected to the first annular stop (71), and the second end of the reset member is connected to the second annular stop (81). The firing structure (3) moves to the far side, and the reset member undergoes elastic deformation.

9. The clamping assembly according to claim 8, characterized in that, The reset element is a spring sleeved on the outer wall of the second sleeve (8).

10. A clamp applicator, characterized in that, It has a clamping assembly as described in any one of claims 1 to 9.

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