clip applier

Abstract

The application discloses a clip applier, comprising a jaw assembly and an acted-on member, the acted-on member being operable in the jaw assembly, the jaw assembly having a release mechanism, the release mechanism being capable of driving the acted-on member to move so that the acted-on member is separated from the jaw assembly. The clip applier is provided with the release mechanism in the jaw assembly, so that the release mechanism can push the clip out of the jaw assembly when the jaw assembly is closed, thereby avoiding pulling the clip when the jaw assembly is opened, avoiding pulling the tissue by the clip, and reducing the risk of minimally invasive surgery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a clip applier. BACKGROUND

[0002] In minimally invasive surgery, clips are often used to hold tissues or blood vessels. The clip has two clip arms arranged oppositely, and the two clip arms can be closed to fix the target tissue between the two clip arms, thereby playing the role of hemostasis and ligation closure.

[0003] The clip is generally placed in the clip applier, and is fixed on the tissue by the clip applier. The clip applier has a jaw assembly, and when the clip is applied, the clip is pushed into the jaw assembly, and the clip in the jaw assembly can be clamped on the tissue by the closure of the jaw assembly.

[0004] In the prior art, after the clip applier makes the clip engage to clamp the tissue in response to the closure of the jaw assembly, the clip and the jaw assembly are not separated, so that when the jaw assembly of the clip applier is opened, the jaw assembly will generate a force on the clip, causing the clip to tear the tissue, increasing the risk of minimally invasive surgery.

[0005] Based on the above, it is necessary to improve the clip applier in the prior art. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a clip applier which solves the problem that the jaw assembly will generate a force on the clip arms when the jaw assembly is opened, causing the clip arms to tear the tissue.

[0007] The present application is achieved by the following technical solutions:

[0008] A clip applier includes a jaw assembly and an acted-on member, the acted-on member is operable in the jaw assembly, the jaw assembly has a release mechanism, the release mechanism can drive the acted-on member to move, so that the acted-on member is separated from the jaw assembly.

[0009] As a preferred embodiment, the release mechanism includes a release assembly, the release assembly has a first element and a second element connected thereto, in response to the force applied on the first element, the first element moves in a first direction, so that the second element moves in a second direction to drive the acted-on member to move, and then the acted-on member is separated from the jaw assembly.

[0010] Further preferably, the movement is rotation.

[0011] As a preferred embodiment, the first direction is the same as the second direction.

[0012] As a preferred embodiment, the jaw assembly includes a jaw arm, and the release assembly is pivotally connected to the jaw arm.

[0013] Further preferably, the release mechanism further comprises an elastic element, which is arranged between the first element and the jaw arm.

[0014] As a preference, the jaw assembly comprises a jaw arm, the release assembly is movably arranged in the jaw arm; the acted-upon member is a clip, at least a part of the clip is operatively located in the jaw arm; the at least a part of the clip is driven by the second element to disengage from the jaw arm.

[0015] As a preference, the second element has a first position and a second position, the second element is located at the first position when the jaw assembly is in an open state, the second element is located at the second position when the jaw assembly is in a closed state; in response to the closure of the jaw assembly, the first element is applied with the force, so that the second element moves from the first position to the second position in the second direction to drive the movement of the acted-upon member; the release mechanism further comprises a retaining mechanism, which makes the second element return to the first position and keeps the second element at the first position when the jaw assembly is switched from the closed state to the open state.

[0016] Further preferably, the jaw assembly comprises a jaw arm, the release assembly is movably arranged in the jaw arm; the retaining mechanism is an elastic element, which is arranged between the release assembly and the jaw arm.

[0017] As a preference, the acted-upon member is a clip, the clip comprises two clip arms, the jaw assembly comprises two jaw arms, at least a part of one of the clip arms is operatively located in one of the jaw arms, at least a part of the other of the clip arms is operatively located in the other of the jaw arms; at least one of the jaw arms is provided with the release mechanism, the release mechanism comprises a release assembly, the release assembly has a first element and a second element connected thereto, in response to the force applied on the first element, the first element moves in a first direction, so that the second element moves in a second direction to drive the movement of the at least a part of the clip arm in the jaw arm where the release mechanism is located, thereby making the clip arm disengage from the jaw arm.

[0018] Further preferably, each of the clip arms has an ear, the at least a part of the clip arm comprises the ear.

[0019] Further preferably, the first element comprises a first force receiving part, in response to the closure of the jaw assembly, the first force receiving part abuts against at least a part of the jaw arm different from the jaw arm where the first force receiving part is located, to apply the force to the first element.

[0020] Further preferably, one of the forceps arms is provided with a first release mechanism and the other forceps arm is provided with a second release mechanism.

[0021] Further preferably, the first element of the first release mechanism and the first element of the second release mechanism each comprise a first force receiving portion; in response to the closing of the jaw assembly, the first force receiving portion of the first release mechanism abuts against the first force receiving portion of the second release mechanism to apply the force to the two first elements respectively.

[0022] Further preferably, the clip has a first state and a second state, at least one of the forceps arms has a spring, in the first state, the spring abuts against the lug in the forceps arm where the spring is located to enable the spring to apply a force to the lug, and in turn, the lug is operable to be located in the forceps arm, in the second state, the lug is disengaged from the spring.

[0023] Compared with the prior art, the application has the beneficial effect that the clip applier of the application is provided with a release mechanism in the jaw assembly, the release mechanism is capable of pushing the clip to move to disengage the clip from the jaw assembly when the jaw assembly is closed, so that the jaw assembly does not pull the clip when the jaw assembly is opened, and thus the clip does not pull the tissue or blood vessel, reducing the risk of minimally invasive surgery. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the clip applier provided by the embodiment of the application;

[0025] Figure 2 is a sectional view of a partial area of the clip applier provided by the embodiment of the application;

[0026] Figure 3 is a sectional view of the rod assembly of the clip applier provided by the embodiment of the application, wherein the push-clip assembly is not in abutment with the clip;

[0027] Figure 4 is a sectional view of the rod assembly of the clip applier provided by the embodiment of the application, wherein the push-clip assembly is in abutment with the clip and pushes the clip into the jaw assembly;

[0028] Figure 5 is a structural schematic diagram of the clip provided by the embodiment of the application;

[0029] Figure 6 is a structural schematic diagram of the jaw assembly of the clip applier in the prior art;

[0030] Figure 7 is a structural schematic diagram of the jaw assembly provided by the embodiment of the application;

[0031] Figure 8 is a cross-sectional view of the first angle of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in an open state;

[0032] Figure 9 is a cross-sectional view of the second angle of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in an open state;

[0033] Figure 10 is a cross-sectional view of the second angle of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in an open state, and the jaw assembly is provided with a clip;

[0034] Figure 11 is a structural schematic view of another angle of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in an open state, and the jaw assembly is provided with a clip;

[0035] Figure 12 is a structural schematic view of the release assembly provided in the embodiment of the present application;

[0036] Figure 13 is a structural schematic view of another angle of the release assembly provided in the embodiment of the present application;

[0037] Figure 14 is a schematic view of the cooperation between the clip and the release assembly provided in the embodiment of the present application;

[0038] Figure 15 is a cross-sectional view of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in a closing process but not completely closed, and the jaw assembly is provided with a clip and the clip is also not completely closed;

[0039] Figure 16 is a cross-sectional view of the jaw assembly provided in the embodiment of the present application, wherein the jaw assembly is in a closed state, and the jaw assembly is provided with a clip and the clip is also in a closed state;

[0040] Figure 17 is a schematic view of the positional relationship between the clip and the second elastic sheet of the jaw assembly in a closed state provided in the embodiment of the present application;

[0041] Figure 18 is a schematic view of another angle of the embodiment of the present application; Figure 17

[0042] Reference signs in the above drawings:

[0043] 1 - jaw assembly; 101 - first jaw arm; 102 - second jaw arm; 103 - first elastic sheet; 104 - second elastic sheet; 1011 - first bottom wall; 1012 - first side wall; 1021 - second bottom wall; 1022 - second side wall; ​

[0044] 2-wrench; 201-push part;

[0045] 3-housing;

[0046] 4-shaft assembly; 401-sleeve; 402-base; 4021-guide groove; 4022-guide slope; 403-elastic push rod; 404-push block;

[0047] 5-driving tube; 501-stop block;

[0048] 6-elastic body;

[0049] 7-clamp; 701-first clamp arm; 702-second clamp arm; 703-first ear; 704-second ear; 705-engaging part;

[0050] 8-release assembly; 801-first element; 802-second element; 803-mounting groove; 804-first column; 805-push arm; 8051-recess; 8052-guide slope;

[0051] 9-elastic element; 10-pin; 11-moving piece; 12-second column; 13-second accommodating portion. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0053] It should be understood that the terms "proximal", "rear" and "distal", "front" used herein are relative to the clinician who manipulates the handle of the clip applier. The terms "proximal", "rear" refer to the part close to the clinician, and the terms "distal", "front" refer to the part away from the clinician. That is, the handle is proximal, the jaw assembly is distal, and the proximal end of a certain part means relatively close to the handle, and the distal end means relatively close to the jaw assembly. The terms "upper", "lower" are with reference to the relative positions of the first jaw arm and the second jaw arm of the jaw assembly. Specifically, the first jaw arm is "upper", and the second jaw arm is "lower". However, the clip applier can be used in many directions and positions, so these terms expressing relative position relationship are not limited and absolute.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "linked" and the like shall be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, can be movably connected, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal connection of two elements or interaction relationship such as abutment between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that when the "connected", "linked" is limited by the modifier, it has the meaning limited by the corresponding modifier, and only excludes the case obviously required to be excluded, and does not exclude other possible cases.

[0055] The term "axial" as used herein refers to the length direction of the sleeve 401.

[0056] The Figures 1-4 , the Figures 7-18 A surgical instrument according to an embodiment of the present application is shown, in particular a clip applier for applying a clip 7 to a human body, for example a blood vessel or other tissue other than a blood vessel.

[0057] With reference to the drawings, a clip applier according to an embodiment of the present application is shown. Figure 1 The clip applier comprises an operating assembly, a shaft assembly 4 extending from the operating assembly, a transmission mechanism, and a jaw assembly 1 provided at a distal end of the shaft assembly 4.

[0058] The operating assembly comprises a housing 3 and a wrench 2 movably mounted on the housing 3.

[0059] With reference to the drawings, a clip applier according to an embodiment of the present application is shown. Figures 3-4 The shaft assembly 4 comprises a clip box, a base 402, a clip pushing assembly, and a sleeve 401 sleeved on the clip box, the base 402, and the clip pushing assembly. The base 402 has strong rigidity, and a guide groove 4021 for accommodating the clip pushing assembly and allowing the clip pushing assembly to move axially is provided on the base 402. A guide inclined surface 4022 is provided at a distal end of the guide groove 4021 and is arranged at an angle to the axial direction. When the base 402 is mounted with the clip box, the guide inclined surface 4022 is inclined towards the distal end and the clip box. Before the clip is applied, the clip 7 is placed in the clip box, and an opening corresponding to the guide inclined surface 4022 is provided on a side wall of the clip box. The distal end of the clip pushing assembly can enter the clip box from the opening and abut against the clip at the rear end of the clip to push the clip forward. Specifically, the clip pushing assembly comprises an elastic push rod 403 and a clip pushing block 404 connected to the distal end of the elastic push rod 403. The elastic push rod 403 is composed of a plurality of metal sheets and has elasticity and can be bent. The elastic push rod 403 and the clip pushing block 404 can move axially in the guide groove 4021. Figure 4When the elastic push rod 403 moves distally to the point that the push block 404 abuts against the guide slope 4022, the elastic push rod 403 starts to bend, and the push block 404 enters the cartridge from the cartridge opening along the guide slope 4022 obliquely, thereby abutting against the rear end of the clip 7 in the cartridge to push the clip 7 forward, so that the clip 7 can enter the jaw assembly 1. After the clip 7 enters the jaw assembly 1, the push block 404 at the distal end of the elastic push rod 403 continues to abut against the rear end of the clip 7 to prevent the clip 7 from moving proximally during the clipping process. When the jaw assembly 1 is closed so that the clip 7 is closed, the elastic push rod 403 moves proximally in the guide groove 4021, and the push block 404 is withdrawn from the opening along the guide slope 4022 into the guide groove 4021. A push-clip driving mechanism is arranged in the shaft assembly 4 to apply a force to the elastic push rod 403, and the push-clip driving mechanism can push the elastic push rod 403 to move distally or proximally.

[0060] Referring again to the drawings Figures 1-2 The jaw assembly 1 includes two jaw arms, i.e., a first jaw arm 101 and a second jaw arm 102, which are pivotably connected to the shaft assembly 4, respectively.

[0061] The transmission mechanism includes a jaw driving mechanism. The jaw driving mechanism includes a driving tube 5 and a sleeve 401. The driving tube 5 is accommodated in the housing 3 of the operating assembly, the proximal end of the sleeve 401 is connected to the driving tube 5, and the distal end of the sleeve 401 cooperates with the jaw assembly 1. Specifically, the jaw assembly 1 has a resilient member between the two jaw arms, when the sleeve 401 moves distally, the jaw assembly 1 can be accommodated in the sleeve 401 from the distal end of the sleeve 401, at this time the resilient member is compressed, and the jaw assembly 1 is closed, when the sleeve 401 moves proximally, the jaw assembly 1 can extend from the distal end of the sleeve 401, and the resilient member releases energy to open the jaw assembly 1. The resilient member can be a spring. The sleeve 401 also constitutes a part of the shaft assembly 4.

[0062] One end of the wrench 2 is provided with a pushing part 201, which is located in the housing 3. A moving part 11 is arranged at the proximal end of the driving tube 5, and the pushing part 201 abuts against the end of the moving part 11 away from the driving tube 5. Thus, by pressing the wrench 2, the pushing part 201 can push the moving part 11 to move distally, so that the moving part 11 pushes the driving tube 5 and the sleeve 401 to move distally.

[0063] The outer sleeve of the driving tube 5 is provided with an elastic body 6. The proximal end of the elastic body 6 abuts against the stopper 501 on the outer surface of the driving tube 5, and the distal end of the elastic body 6 abuts against the inner wall of the housing 3 of the clip applier. When the wrench 2 is pressed to push the pushing portion 201 to move the driving tube 5 distally, the sleeve 401 can be moved distally to close the first jaw arm 101 and the second jaw arm 102, and at this time, the elastic body 6 stores energy. When the wrench 2 is released, the elastic body 6 releases the energy to move the driving tube 5 proximally to reset, so that the sleeve 401 moves proximally to open the first jaw arm 101 and the second jaw arm 102. In the embodiment, the elastic body 6 can be a spring.

[0064] A clip 7 can be supported between the first jaw arm 101 and the second jaw arm 102. The jaw assembly 1 is switched between an open state and a closed state. The open state of the jaw assembly 1 includes an open-to-bottom state, in which the distance between the distal ends of the first jaw arm 101 and the second jaw arm 102 in the up-down direction is maximum. In the closed state of the jaw assembly 1, the distance between the distal ends of the first jaw arm 101 and the second jaw arm 102 in the up-down direction is minimum. The closing of the jaw assembly 1 changes the clip 7 from an open state to a closed state.

[0065] Reference will be made to the drawings Figure 5 The clip includes two clip arms, i.e., a first clip arm 701 and a second clip arm 702. One end of the first clip arm 701 has two first ears 703, one of which is arranged on one side of the first clip arm 701, and the other of which is arranged on the other side of the first clip arm 701. One end of the second clip arm 702 has an engaging portion 705. When the clip 7 is closed, the engaging portion 705 of the second clip arm 702 can be engaged between the two first ears 703 of the first clip arm 701, so that the first clip arm 701 and the second clip arm 702 are tightly clamped, and thus the blood vessel or tissue placed between the first clip arm 701 and the second clip arm 702 can be effectively clamped and hemostasia. In order to facilitate the installation of the clip 7 in the clip applier, each side of the second clip arm 702 is provided with a second ear 704 to limit the position. The two second ears 704 are symmetrically arranged on the two side walls of the second clip arm 702 and are close to the end of the second clip arm 702 having the engaging portion 705.

[0066] Reference will be made to the drawings Figure 6, the prior art, the first jaw arm 101 of the clip applier, the distal end of the first jaw arm 101 is provided with two first accommodating portions corresponding to the two first ears 703 of the first clip arm 701. The distal end of the second jaw arm 102 is provided with two second accommodating portions 13 corresponding to the two second ears 704 of the second clip arm 702. After the pusher block 404 at the distal end of the elastic push rod 403 pushes the clip 7 from the shaft assembly 4 into the jaw assembly 1, each first ear 703 is accommodated in the corresponding first accommodating portion, and each second ear 704 is accommodated in the corresponding second accommodating portion 13. Before the clip 7 is applied, the clip 7 is placed in a clip box in the shaft assembly 4 of the clip applier. Due to the size and internal space of the clip box, the clip 7 is stored in the compressed state in the clip box. The compression means that the two clip arms of the clip 7 are close to each other but not engaged. Since the clip 7 is assembled into the clip box and then used for a period of time, the compression during the period of time causes the clip 7 to still have a tendency to maintain the shape after compression when the clip 7 is pushed out into the jaw assembly 1, which affects the use of the clip 7.

[0067] In order to overcome the technical problem that the clip 7 still maintains the shape after compression when the clip 7 is pushed out, which affects the use of the clip 7, the prior art clip applier is provided with the first spring 103 in the first jaw arm 101 and the second spring 104 in the second jaw arm 102. When the clip 7 is pushed from the shaft assembly into the jaw assembly 1, each first ear 703 moves between the corresponding first spring 103 and the first jaw arm 101, and each second ear 704 moves between the corresponding second spring 104 and the second jaw arm 102. Thus, each first spring 103 can stop the corresponding first ear 703 during the movement of the first clip arm 701 to the distal end, and each second spring 104 can stop the corresponding second ear 704 during the movement of the second clip arm 702 to the distal end, so that the first clip arm 701 and the second clip arm 702 can gradually expand to restore the original shape. When each first ear 703 of the clip 7 moves into the corresponding first accommodating portion, and each second ear 704 moves into the corresponding second accommodating portion 13, the distal end of the first spring 103 abuts against the corresponding first ear 703, and the distal end of the second spring 104 abuts against the corresponding second ear 704. After the jaw assembly 1 is closed to close the first clip arm 701 and the second clip arm 702, and the clip 7 is clamped on the tissue or blood vessel, it is easy for the first ear 703 to not be separated from the first spring 103, and for the second ear 704 to not be separated from the second spring 104, so that when the jaw assembly 1 is opened, the jaw assembly 1 will generate a force on the first clip arm 701 and the second clip arm 702, which will cause the clip 7 to tear the tissue, increasing the risk of minimally invasive surgery.

[0068] In order to overcome the technical problem that the clip 7 in the clip applier is difficult to be separated from the jaw assembly 1 in the prior art, the clip applier is improved in the embodiment. The jaw assembly 1 of the clip applier in the embodiment has a release mechanism. The release mechanism can drive the clip 7 in the jaw assembly 1 to move, so that the clip 7 is separated from the jaw assembly 1. The release mechanism is arranged in the first jaw arm 101 and / or the second jaw arm 102. Preferably, the first jaw arm 101 and the second jaw arm 102 of the clip applier in the embodiment are both provided with the release mechanism at the front end. Each release mechanism comprises a release assembly 8, an elastic element 9 and a pin shaft 10.

[0069] The release assembly 8 has a first element 801 and a second element 802 connected with each other. In order to facilitate installation and manufacturing, the first element 801 and the second element 802 are integrated in the embodiment. The first element 801 is located at the distal end of the release assembly 8, and the second element 802 is located at the proximal end of the release assembly 8.

[0070] The elastic element 9 is arranged at the distal end of the release assembly 8, and the first element 801 is also located at the distal end of the release assembly 8, i.e. the arrangement position of the first element 801 corresponds to the arrangement position of the elastic element 9. An installation groove 803 is arranged at the end face of the release assembly 8 opposite to the first element 801, a first column body 804 is arranged in the installation groove 803, and one end of the elastic element 9 is arranged in the installation groove 803 and sleeved on the first column body 804. By arranging the first column body 804 and the installation groove 803, the elastic element 9 can be limited, so that the position of the elastic element 9 will not be deviated. The elastic element 9 in the embodiment can be a spring.

[0071] The pin shaft 10 is arranged in the release assembly 8, and the pin shaft 10 is arranged between the first element 801 and the second element 802. The release assembly 8 is pivotally connected with the corresponding jaw arm through the pin shaft.

[0072] Reference is made to the accompanying drawings Figure 9 The first jaw arm 101 comprises a first bottom wall 1011 and first side walls 1012 arranged on both sides of the first bottom wall 1011. The second jaw arm 102 comprises a second bottom wall 1021 and second side walls 1022 arranged on both sides of the second bottom wall 1021.

[0073] Reference is made to the accompanying drawings Figures 7-11In the first jaw arm 101, the two ends of the pin shaft 10 are connected with two first side walls 1012 of the first jaw arm 101 respectively, so that the release assembly 8 can rotate around the pin shaft 10. The elastic element 9 is arranged between the release assembly 8 and the first bottom wall 1011 of the first jaw arm 101. Specifically, the distal end of the release assembly 8 is matched with the first bottom wall 1011 through the elastic element 9. A second cylinder 12 is arranged in the first bottom wall 1011 of the first jaw arm 101 corresponding to the elastic element 9. One end of the elastic element 9 is sleeved on the first cylinder 804 of the release assembly 8 and abuts against the release assembly 8, and the other end of the elastic element 9 is sleeved on the second cylinder 12 and abuts against the first bottom wall 1011 of the first jaw arm 101. The end face of the first cylinder 804 facing the first bottom arm can extend out of the mounting groove 803 or be flush with the end face of the mounting groove 803 facing the first bottom arm, and the first cylinder 804 can also be completely located in the mounting groove 803, but the first cylinder 804 and the second cylinder 12 have a preset distance in the open state of the jaw assembly 1 to avoid hindering the rotation of the release assembly 8.

[0074] In the second jaw arm 102, the two ends of the pin shaft 10 are connected with two second side walls 1022 of the second jaw arm 102 respectively, so that the release assembly 8 can rotate around the pin shaft 10. The elastic element 9 is arranged between the release assembly 8 and the second bottom wall 1021 of the second jaw arm 102. Specifically, the distal end of the release assembly 8 is matched with the second bottom wall 1021 through the elastic element 9. A second cylinder 12 is arranged in the second bottom wall 1021 of the second jaw arm 102 corresponding to the elastic element 9. One end of the elastic element 9 is sleeved on the first cylinder 804 of the release assembly 8 and abuts against the release assembly 8, and the other end of the elastic element 9 is sleeved on the second cylinder 12 and abuts against the second bottom wall 1021 of the second jaw arm 102. The end face of the first cylinder 804 facing the second bottom arm can extend out of the mounting groove 803 or be flush with the end face of the mounting groove 803 facing the second bottom arm, and the first cylinder 804 can also be completely located in the mounting groove 803, but the first cylinder 804 and the second cylinder 12 have a preset distance in the open state of the jaw assembly 1 to avoid hindering the rotation of the release assembly 8.

[0075] In the first jaw arm 101, the first element 801 extends towards the second jaw arm 102, and the first element 801 is convex relative to the first jaw arm 101. The second element 802 includes two parallel push arms 805. The two push arms 805 are arranged corresponding to the two first ear portions 703 of the first clamping arm 701. Each push arm 805 extends towards the second jaw arm 102. Referring to the accompanying drawings, the first clamping arm 701 is arranged on the first jaw arm 101, and the second clamping arm 702 is arranged on the second jaw arm 102. The first clamping arm 701 and the second clamping arm 702 are arranged in the jaw assembly 1 in a clamping state. Figures 8-14The end face of each push arm 805 towards the second jaw arm 102 is provided with a recess 8051 and a guide slope 8052 from the distal end to the proximal end in sequence. The distal end of the guide slope 8052 is connected with the recess 8051. When the jaw assembly 1 is in the open state, the elastic element 9 can apply a downward force to the distal end of the release mechanism, so that the proximal end of the release mechanism abuts against the first jaw arm 101. Since the second element 802 is located at the proximal end of the release mechanism, the proximal end of the guide slope 8052 of each push arm 805 abuts against the first bottom wall 1011 of the first jaw arm 101. By providing the guide slope 8052, the recess 8051 of each push arm 805 and the first bottom wall 1011 of the first jaw arm 101 are smoothly connected. Thus, the first lug 703 is facilitated to move from the first bottom wall 1011 to the guide slope 8052 corresponding thereto, and then slide through the guide slope 8052 to move into the recess 8051 corresponding thereto.

[0076] In the second jaw arm 102, the first element 801 extends towards the first jaw arm 101, and the first element 801 is convex relative to the second jaw arm 102. The second element 802 includes two push arms 805 arranged in parallel. The two push arms 805 correspond to the two second lugs 704 of the second clamping arm 702. Each push arm 805 extends towards the first jaw arm 101. The end face of each push arm 805 towards the first jaw arm 101 is provided with a recess 8051 and a guide slope 8052 from the distal end to the proximal end in sequence. The distal end of the guide slope 8052 is connected with the recess 8051. When the jaw assembly 1 is in the open state, the elastic element 9 can apply an upward force to the distal end of the release mechanism, so that the proximal end of the release mechanism abuts against the second jaw arm 102. Since the second element 802 is located at the proximal end of the release mechanism, the proximal end of the guide slope 8052 of each push arm 805 abuts against the second bottom wall 1021 of the second jaw arm 102. By providing the guide slope 8052, the recess 8051 of each push arm 805 and the second bottom wall 1021 of the second jaw arm 102 are smoothly connected. Thus, the second lug 704 is facilitated to move from the second bottom wall 1021 to the guide slope 8052 corresponding thereto, and then slide through the guide slope 8052 to move into the recess 8051 corresponding thereto.

[0077] Reference will be made to the drawings in Figures 15-18When the jaw assembly 1 is closed, the first element 801 in the first jaw arm 101 and the first element 801 in the second jaw arm 102 can abut against each other, so that the release mechanism in the first jaw arm 101 and the release mechanism in the second jaw arm 102 can rotate in opposite directions, thus the release mechanism in the first jaw arm 101 can push the first ear 703 to move, and the release mechanism in the second jaw arm 102 can push the second ear 704 to move, so that the clamping arms of the clip 7 are released from the jaw assembly 1. Specifically, each first element 801 comprises a first force receiving portion, when the jaw assembly 1 is closed, the first force receiving portion of the first element 801 in the first jaw arm 101 and the first force receiving portion of the first element 801 in the second jaw arm 102 abut against each other, so that the two first elements 801 can exert force on each other. In response to the force exerted on the first force receiving portion of the first element 801, the release assembly 8 rotates about the pin shaft 10, i.e. the first element 801 can rotate in a first direction to make the second element 802 corresponding thereto rotate in a second direction, thereby pushing the clip 7 to move, so that the clip 7 is released from the jaw assembly 1. In the embodiment, the first direction and the second direction are the same direction. For the sake of clarity, the first direction and the second direction are not shown in the drawings. Figures 8-9 and the accompanying Figure 11 Two first elastic sheets 103 are arranged in the first jaw arm 101. Each of the two first elastic sheets 103 is arranged along the extension direction of the first jaw arm 101. The proximal end of one of the first elastic sheets 103 is connected to one of the first side walls 1012, and the proximal end of the other first elastic sheet 103 is connected to the other first side wall 1012. The distal end of each first elastic sheet 103 is movable up and down. There is a predetermined distance between each first elastic sheet 103 and the first bottom wall 1011, so that each first ear 703 can move between the first elastic sheet 103 corresponding thereto and the first bottom wall 1011. For the sake of clarity, the first elastic sheets 103 are not shown in the drawings. Figures 7-9 Two second elastic sheets 104 are arranged in the second jaw arm 102. Each of the two second elastic sheets 104 is arranged along the extension direction of the second jaw arm 102. The proximal end of one of the second elastic sheets 104 is connected to one of the second side walls 1022, and the proximal end of the other second elastic sheet 104 is connected to the other second side wall 1022. The distal end of each second elastic sheet 104 is movable up and down. There is a predetermined distance between each second elastic sheet 104 and the second bottom wall 1021, so that each second ear 704 can move between the second elastic sheet 104 corresponding thereto and the second bottom wall 1021.

[0078] Again referring to the accompanying Figures 10-11, the first clamping arm 701 moves along the first jaw arm 101, and the second clamping arm 702 moves along the second jaw arm 102. Specifically, the first clamping arm 701 moves between the two first elastic sheets 103, and each first ear portion 703 of the first clamping arm 701 moves between the corresponding first elastic sheet 103 and the first bottom wall 1011 of the first jaw arm 101, and each first ear portion 703 can move onto the corresponding guide slope 8052 and slide along the guide slope 8052 to move into the corresponding recess 8051. Since the first elastic sheet 103 is provided, when each first ear portion 703 is located in the corresponding recess 8051, the distal end of each first elastic sheet 103 can abut against the corresponding first ear portion 703 to hold the first ear portion 703 in the corresponding recess 8051.

[0079] The second clamping arm 702 moves between the two second elastic sheets 104, and each second ear portion 704 of the second clamping arm 702 moves between the corresponding second elastic sheet 104 and the second bottom wall 1021 of the second jaw arm 102, and each second ear portion 704 can move onto the corresponding guide slope 8052 and slide along the guide slope 8052 to move into the corresponding recess 8051. Since the second elastic sheet 104 is provided, when each second ear portion 704 is located in the corresponding recess 8051, the distal end of each second elastic sheet 104 can abut against the corresponding second ear portion 704 to hold the second ear portion 704 in the corresponding recess 8051.

[0080] Thus, when the clamp 7 moves in the jaw assembly 1, each first elastic sheet 103 can stop the corresponding first ear portion 703 during the movement of the first clamping arm 701 to the distal end, and each second elastic sheet 104 can stop the corresponding second ear portion 704 during the movement of the second clamping arm 702 to the distal end, so that the first clamping arm 701 and the second clamping arm 702 of the clamp 7 can gradually expand to restore their original shape. It should be noted that the structures of the clamp box, the base, and the push-clamp assembly in the rod body assembly 4 and the operation mode of the push-clamp assembly do not affect the function of the release mechanism in the jaw assembly 1.

[0081] Reference will be made to the accompanying drawings Figures 15-18For the release mechanism in the first jaw arm 101, when the jaw assembly 1 is closed, in response to the force applied on the first force receiving part of the first element 801, the first element 801 rotates in the clockwise direction, so that each push arm 805 of the second element 802 can drive the first ear 703 in the recess 8051 of the push arm 805 to move, so that each first ear 703 has a movement towards the distal end and the second jaw arm 102, so that both first ears 703 can be disengaged from the corresponding first spring 103 under the push of the corresponding second element 802, to release the first jaw arm 101.

[0082] Reference is made to the accompanying drawings that show Figures 15-18 For the release mechanism in the second jaw arm 102, when the jaw assembly 1 is closed, in response to the force applied on the first force receiving part of the first element 801, the first element 801 rotates in the counterclockwise direction, so that each push arm 805 of the second element 802 can drive the second ear 704 in the recess 8051 of the push arm 805 to move, so that each second ear 704 has a movement towards the distal end and the first jaw arm 101, so that both second ears 704 can be disengaged from the corresponding second spring 104 under the push of the corresponding second element 802, to release the second jaw arm 102.

[0083] Reference is made to the accompanying drawings that show Figure 15 The first element 801 in the first jaw arm 101 is convex relative to the first jaw arm 101, while the first element 801 in the second jaw arm 102 is convex relative to the second jaw arm 102, so that during the closing of the first jaw arm 101 and the second jaw arm 102, the first force receiving parts of the two first elements 801 push against each other to apply force to each other before the first jaw arm 101 and the second jaw arm 102 are completely closed, so that the two second elements 802 move, i.e., before the jaw assembly 1 reaches the completely closed state, the two second elements 802 have already applied force to the first ear 703 and the second ear 704 respectively, to push the first ear 703 and the second ear 704 to move. Specifically, before the jaw assembly 1 is completely closed, when the first force receiving parts of the two first elements 801 push against each other, the two second elements 802 generate a pushing force to the ears of the clip 7, so that the clip 7 is compressed but not completely closed. When the jaw assembly 1 is completely closed, under the push of the two second elements 802, the engaging part 705 of the second clip arm 702 engages between the two first ears 703 of the first clip arm 701, the clip 7 is completely closed, at this time each first ear 703 is disengaged from the corresponding first spring 103, and each second ear 704 is disengaged from the corresponding second spring 104.

[0084] The first force receiving portions of the two first elements 801 push against each other before the first jaw arm 101 and the second jaw arm 102 are fully closed, so that the two second elements 802 push the ear portions of the clip 7, and the ear portions of the clip 7 can have been released from the corresponding spring portions before the jaw assembly 1 is closed. Alternatively, the ear portions of the clip 7 are released from the spring portions when the jaw assembly 1 is fully closed. During the process that the two second elements 802 push the clip 7 to be compressed to gradually reach the fully closed state, the two first ear portions 703 and the two second ear portions 704 of the clip 7 are always placed in the corresponding recesses 8051 until the jaw assembly 1 is opened, and the two first ear portions 703 and the two second ear portions 704 are released from the corresponding recesses 8051, respectively. And the closing of the jaw assembly 1 is a fast closing process, and if the ear portions of the clip 7 are released from the spring portions before the jaw assembly 1 is fully closed, the time difference from the ear portions of the clip 7 being released from the spring portions to the jaw assembly 1 reaching the fully closed state is small, and the ear portions of the clip 7 can still be normally closed after being released from the spring portions. In summary, during the closing process of the jaw assembly 1, whether the ear portions of the clip 7 are released from the spring portions at what time will not affect the closing of the clip 7.

[0085] In this embodiment, the descriptions of the movement directions of the first element 801 and the second element 802 in the first jaw arm 101 and the descriptions of the movement directions of the first element 801 and the second element 802 in the second jaw arm 102 are both made with reference to the direction and angle of the clip applier shown in FIG. 1. Figure 1 In this embodiment, the descriptions of the movement directions of the first element 801 and the second element 802 in the first jaw arm 101 and the descriptions of the movement directions of the first element 801 and the second element 802 in the second jaw arm 102 are both made with reference to the direction and angle of the clip applier shown in FIG. 1.

[0086] For the first jaw arm 101, when the first element 801 rotates in the clockwise direction, the distal end of the release assembly 8 moves toward the first jaw arm 101 at the same time, so that the elastic element 9 between the distal end of the release assembly 8 and the first jaw arm 101 is compressed. When the second element 802 rotates in the clockwise direction, the guide slope 8052 of the second element 802 is released from the first jaw arm 101. For the second jaw arm 102, when the first element 801 rotates in the counterclockwise direction, the distal end of the release assembly 8 moves toward the second jaw arm 102 at the same time, so that the elastic element 9 between the distal end of the release assembly 8 and the second jaw arm 102 is compressed. When the second element 802 rotates in the counterclockwise direction, the guide slope 8052 of the second element 802 is released from the second jaw arm 102.

[0087] When the jaw assembly 1 is finished clamping, the jaw assembly 1 is opened, at this time the clip 7 has been transferred from the jaw assembly 1 to the tissue or blood vessel, under the action of the elastic element 9, the release mechanism in the first jaw arm 101 and the second jaw arm 102 are reset. Specifically, for the first jaw arm 101, when the jaw assembly 1 is opened, the force applied to the first force receiving portion of the first element 801 is removed, the compressed elastic element 9 can drive the first element 801 to rotate in the counterclockwise direction to reset, while driving the second element 802 to rotate in the counterclockwise direction to reset. For the second jaw arm 102, when the jaw assembly 1 is opened, the force applied to the first force receiving portion of the first element 801 is removed, the compressed elastic element 9 can drive the first element 801 to rotate in the clockwise direction to reset, while driving the second element 802 to rotate in the clockwise direction to reset. In other words, each second element 802 has a first position and a second position. When the jaw assembly 1 is in the open state, the second element 802 is in the first position. When the jaw assembly 1 is in the closed state, the second element 802 is in the second position. In response to the closure of the jaw assembly 1, the second element 802 can move from the first position to the second position in the second direction to push the ear away from the spring. When the jaw assembly 1 switches from the closed state to the open state, the elastic element 9 can make the second element 802 return to the first position and keep it in the first position. For the first jaw arm 101, the elastic element 9 resets and keeps the second element 802 in the first position, which can make the proximal end of the guide slope 8052 of the second element 802 and the first bottom wall 1011 of the first jaw arm 101 meet, so as to facilitate the next clamping. For the second jaw arm 102, the elastic element 9 resets and keeps the second element 802 in the first position, which can make the proximal end of the guide slope 8052 of the second element 802 and the second bottom wall 1021 of the second jaw arm 102 meet, so as to facilitate the next clamping. From the perspective of the clip 7, the clip 7 has a first state and a second state. In the first state, the two first ears 703 of the clip 7 are respectively in contact with the two first springs 103, the two first springs 103 can respectively apply a force to the two first ears 703, so that each first ear 703 is operable in the first jaw arm 101. The two second ears 704 are in contact with the two second springs 104, and the two second springs 104 can respectively apply a force to the two second ears 704, so that each second ear 704 is operable in the second jaw arm 102. In the second state, each first ear 703 and the corresponding first spring 103 are separated, and each second ear 704 and the corresponding second spring 104 are separated.

[0088] When the jaw assembly 1 is closed, the release mechanism in the first jaw arm 101 disengages the two first ears 703 from the two first springs 103 respectively, and the release mechanism in the second jaw arm 102 disengages the two second ears 704 from the two second springs 104 respectively, so that after the clip 7 is applied, the two clip arms of the clip 7 are already disengaged from the jaw assembly 1, so that when the jaw assembly 1 is opened, the two jaw arms of the jaw assembly 1 will not pull the two clip arms of the clip 7, so that the clip 7 will not pull the tissue or blood vessel, reducing the risk of minimally invasive surgery.

[0089] In some alternative embodiments, the release mechanism is only provided in one of the jaw arms, and the other jaw arm is not provided with the release mechanism. Here, the case where the first jaw arm 101 has the release mechanism and the second jaw arm 102 does not have the release mechanism is described:

[0090] When the jaw assembly 1 is closed, the first element 801 in the first jaw arm 101 can abut against the end face of the second jaw arm 102 to apply a force to the first element 801. Further, a protrusion can be provided on the end face of the second jaw arm 102, which corresponds to the first element 801 in the first jaw arm 101, for abutting against the first element 801 to apply a force thereto when the jaw assembly 1 is closed. Since the release mechanism is provided in the first jaw arm 101, the release mechanism can apply a force to the two first ears 703 of the clip 7 when the jaw assembly 1 is closed, so that the two first ears 703 of the clip 7 are disengaged from the springs to disengage from the first jaw arm 101, so that the resistance of the clip 7 and the jaw assembly 1 is reduced, and the tearing of the clip 7 to the tissue or blood vessel when the jaw assembly 1 is opened is alleviated.

[0091] In summary, in the present embodiment, by providing the release mechanism in the jaw assembly 1, the release mechanism can push the clip 7 to move when the jaw assembly 1 is closed to disengage the clip 7 from the jaw assembly 1, so that when the jaw assembly 1 is opened, the jaw assembly 1 will not pull the clip arms of the clip 7, so that the clip arms of the clip 7 will not pull the tissue or blood vessel, reducing the risk of minimally invasive surgery.

[0092] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0093] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A clamping pliers, characterized in that, A release mechanism for a jaw assembly, the jaw assembly having a jaw arm and an acted-on member operatively positioned in the jaw arm, the release mechanism comprising a release assembly having a first element and a second element connected thereto, the first element being movable in a first direction in response to a force applied thereto, the second element being movable in a second direction in response to the movement of the first element to drive the acted-on member to disengage from the jaw arm. The release assembly comprises a pin disposed between the first element and the second element, the release assembly being pivotally connected to the jaw arm via the pin.

2. The clip applier of Claim 1, wherein, The first direction is the same as the second direction.

3. The clip applier of Claim 1, wherein, The jaw assembly comprises a jaw arm, the release assembly being pivotally connected to the jaw arm.

4. The clip applier of Claim 1, wherein, The release mechanism further comprises a resilient element disposed between the first element and the jaw arm.

5. The clip applier of Claim 4, wherein, The jaw assembly comprises a jaw arm, the release assembly being movably disposed in the jaw arm; the acted-on member is a clip, at least a portion of the clip being operatively positioned in the jaw arm.

6. The clip applier of Claim 1, wherein, The at least a portion of the clip is driven by the second element to disengage from the jaw arm. The second element has a first position and a second position, the second element being in the first position when the jaw assembly is in an open state and being in the second position when the jaw assembly is in a closed state; in response to the closing of the jaw assembly, the first element is applied with the force, causing the second element to move in the second direction from the first position to the second position to drive the acted-on member to move; the release mechanism further comprises a retaining mechanism, the retaining mechanism causing the second element to return to the first position and to be retained in the first position when the jaw assembly is switched from the closed state to the open state.

7. The clip applier of Claim 1, wherein, The jaw assembly comprises a jaw arm, the release assembly being movably disposed in the jaw arm; the retaining mechanism is a resilient element, the resilient element being disposed between the release assembly and the jaw arm.

8. The clip applier of Claim 7, wherein, The acted-on member is a clip, the clip comprising two clip arms, the jaw assembly comprising two jaw arms, at least a portion of one of the clip arms being operatively positioned in one of the jaw arms, at least a portion of the other of the clip arms being operatively positioned in the other of the jaw arms; at least one of the jaw arms is provided with the release mechanism, the release mechanism comprising a release assembly having a first element and a second element connected thereto, the first element being movable in a first direction in response to a force applied thereto, the second element being movable in a second direction in response to the movement of the first element to drive the at least a portion of the clip arm in the jaw arm where the release mechanism is located to move, thereby causing the clip arm to disengage from the jaw arm.

9. The clip applier of Claim 1, wherein, Each of the clip arms has an ear, the at least a portion of the clip arm comprising the ear.

10. The clip applier of Claim 9, wherein, ​ 11. The clip applier of Claim 9, wherein, The first element comprises a first force receiving portion which, in response to closure of the jaw assembly, abuts at least a portion of the jaw arm other than the jaw arm in which the first force receiving portion is located to apply the force to the first element.

12. The clip applier of Claim 9, wherein, One of the jaw arms is provided with a first release mechanism and the other of the jaw arms is provided with a second release mechanism.

13. The clip applier of Claim 12, wherein, The first element of the first release mechanism and the first element of the second release mechanism each comprise a first force receiving portion; in response to closure of the jaw assembly, the first force receiving portion of the first release mechanism abuts the first force receiving portion of the second release mechanism to apply the force to both of the first elements respectively.

14. The clip applier of Claim 10, wherein, The clip has a first state and a second state, at least one of the jaw arms has a spring piece, in the first state, the spring piece abuts the lug in the jaw arm in which the spring piece is located to enable the spring piece to apply a force to the lug, and in turn, enable the lug to be operatively located in the jaw arm, in the second state, the lug is disengaged from the spring piece.

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