A clamp applicator

Abstract

The invention discloses a clamping forceps, comprising a clamp head assembly and a body assembly, wherein the proximal end of the clamp head assembly is connected to the distal end of the body assembly, the clamp head assembly comprises a clamp head and an outer tube, the outer tube is sleeved on a ligation clamp, the body assembly comprises a trigger assembly, a sliding assembly and a ratchet component, and the trigger assembly comprises a trigger body and an elastic component; the trigger body is pulled toward the proximal direction to drive the elastic component to jump in the ratchet component, so that the sliding component slides toward the distal direction, thereby controlling the ligation clamp to close; the trigger body is pushed toward the distal direction to drive the elastic component to jump in the ratchet component, so that the sliding part slides toward the proximal direction, thereby controlling the ligation clamp to open.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a clip applier. Background Art

[0002] At present, the ligation clips used in the market are generally clamped with tools such as clamps or pliers, which is very inconvenient to use. In addition, the stacked ligation clips are easily disturbed during the clamping process, which makes the ligation clips more messy and inconvenient to clamp and use, and the ligation clips are easily spilled, causing contamination.

[0003] Another type of continuous ligation clamp and clamp applier has a movable wrench that is limited by its material and structure. In addition, the force required to push and close the clamp is relatively large, so the teeth may break easily during the elastic deformation process.

[0004] The existing clip appliers on the market have a complex structure and high assembly requirements, which makes the production and use costs very high, and the technical problem of being unable to achieve the continuous operation of pushing and closing the clamp is solved.

[0005] Therefore, it is urgent to develop a clamping forceps with simple structure, easy operation, and continuous push-clamp and close-clamp operations. This patent introduces a clamping forceps that can realize continuous push-clamp and close-clamp operations. Summary of the invention

[0006] The technical problem to be solved by the present invention is to solve the technical problem that the prior art cannot realize the continuous operation of pushing and closing the clamp. To solve the above technical problem, the technical solution provided by the present invention is as follows:

[0007] A clip applier comprises a clamp head assembly and a body assembly, wherein the proximal end of the clamp head assembly is connected to the distal end of the body assembly, the clamp head assembly comprises a clamp head and an outer tube, and the outer tube is sleeved on a ligation clip, characterized in that the body assembly comprises a trigger assembly, a slide assembly and a ratchet component, and the trigger assembly comprises a trigger body and an elastic component;

[0008] Pulling the trigger body in the proximal direction drives the elastic component to jump in the ratchet component, causing the sliding component to slide in the distal direction, thereby controlling the ligation clip to close;

[0009] The trigger body is pushed toward the distal direction to drive the elastic component to jump in the ratchet component, so that the sliding part slides toward the proximal direction, thereby controlling the ligation clip to open.

[0010] Furthermore, the trigger body includes a trigger and a trigger cover plate, and the trigger cover plate is buckled on the trigger;

[0011] The elastic component is an elastic sheet, the trigger is provided with a first slot and a second slot, and a part of the elastic sheet is located in the first slot and the second slot in the trigger;

[0012] The elastic sheet includes a third slot and a fourth slot, the trigger is correspondingly provided with a first fixing point for fixing the fourth slot, and the trigger cover is correspondingly provided with a second fixing point for fixing the third slot.

[0013] Furthermore, the trigger cover plate being buckled on the trigger means that the trigger is provided with a first lock buckle and a second lock buckle, and the trigger cover plate is correspondingly provided with a first lock buckle hole and a second lock buckle hole, the first lock buckle is buckled into the first lock buckle hole, and the second lock buckle is buckled into the second lock buckle hole.

[0014] Furthermore, the elastic sheet is bent twice to form a first bending angle and a second bending angle; the elastic sheet also includes a first reset groove and a second reset groove; the first bending angle to the end part is inserted into the first slot, and the area between the first bending angle and the second bending angle is inserted into the second slot.

[0015] Furthermore, the ratchet component includes a ratchet, a ratchet sliding portion, and a ratchet back portion; the end surface of the upper end portion of the ratchet component is evenly distributed with the ratchet teeth, and the ratchet back portion is a smooth structure.

[0016] Furthermore, the elastic sheet also includes a first reset groove and a second reset groove; the second bending angle is placed on the ratchet component to perform a snapping movement; when performing a reset operation, the first reset groove and the second reset groove are used to contact the back of the ratchet to perform a guiding movement.

[0017] Furthermore, the sliding part includes a push-pull rod and a return spring, and the return spring is sleeved on the push-pull rod.

[0018] Furthermore, when performing a push-clamp operation, the trigger is pressed to push the push-pull rod toward the distal direction, the reset spring is compressed and stressed, and the elastic sheet rotates to the first ratchet tooth of the ratchet component. At this time, the ligation clamp is completely pushed to the first position of the jaws; the trigger is continued to be pressed, and the elastic sheet slides over the ratchet teeth of the ratchet component respectively. When the elastic sheet and the last tooth of the ratchet component remain in meshing state, the ligation clamp reaches the second position of the jaws, completing the push-clamp operation.

[0019] Furthermore, when performing a clamping operation, the trigger continues to be pressed, the return spring continues to be compressed, the elastic sheet is completely disengaged from the ratchet of the ratchet component, the elastic sheet rebounds to its initial state, and slides along the buffer zone of the ratchet component, the trigger closes and rotates to the final position, so that the ligation clamp completes the locking operation at the third position of the jaws.

[0020] Furthermore, when performing a reset operation, the trigger is released, and the first reset groove and the second reset groove of the elastic sheet respectively cooperate with the back of the ratchet, and the elastic sheet slides downward along the back of the ratchet to reset, thereby resetting the push-pull rod in the proximal direction, thereby completing the reset of the elastic sheet.

[0021] After adopting such a design, the present invention has at least the following advantages:

[0022] (1) The push-and-clamp operation process of the present invention can be stopped at any time by closing the trigger, so that the doctor can adjust the relative position of the instrument and the tissue at any time, thereby improving the quality of the operation.

[0023] (2) During the pushing and clamping process of the present invention, the elastic sheet and the ratchet component will produce a "click-click-click" sound prompt during the sliding process. When entering the clamping operation, the prompt sound disappears. The sound can remind the doctor of the two operating states of pushing and clamping and closing the clamp, which can serve as a safety warning during the operation of the instrument.

[0024] (3) The present invention has a simple structure, good effect, low cost and easy process implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Figure 1 is a schematic diagram of an initial state of a clip applier according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the contact between the elastic sheet and the first ratchet tooth of the ratchet component according to one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the completion of pushing and clamping according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the completion of clamping according to an embodiment of the present invention;

[0030] Figure 5A is a schematic diagram of the initial position of the body assembly of one embodiment of the present invention;

[0031] Figure 5Bis a partially enlarged schematic diagram of the initial position of the body assembly of one embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the initial position of a clamp head assembly according to an embodiment of the present invention;

[0033] Figure 7 is a schematic diagram of a trigger structure of an embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of the elastic sheet structure of an embodiment of the present invention;

[0035] Fig. 9 is a schematic diagram of the trigger cover structure of an embodiment of the present invention;

[0036] Fig. 10A It is a schematic diagram of the position of the body assembly of one embodiment of the present invention from the initial position to the push-clamp state 1;

[0037] Fig. 10B It is a partial enlarged schematic diagram of the body assembly of one embodiment of the present invention reaching the push-clamp state 1 from the initial position;

[0038] Fig.11 It is a schematic diagram of the jaw assembly of one embodiment of the present invention reaching the push clamping state 1 from the initial position;

[0039] Fig. 12A It is a schematic diagram of a body assembly of an embodiment of the present invention moving from a push-clamp state 1 position to a push-clamp state 2 position;

[0040] Fig. 12B It is a partial enlarged schematic diagram of a body assembly of an embodiment of the present invention moving from a push-clamp state 1 position to a push-clamp state 2 position;

[0041] Fig.13 It is a schematic diagram of the jaw assembly of one embodiment of the present invention moving from the push-clamp state 1 position to the push-clamp state 2 position;

[0042] Fig.14A It is a schematic diagram of the body assembly of one embodiment of the present invention reaching the locked ligation clamp 3 position from the clamping state 2 position;

[0043] Fig. 14B It is a partial enlarged schematic diagram of the body assembly of one embodiment of the present invention reaching the locked ligation clamp 3 position from the clamping state 2 position;

[0044] Fig.15 It is a schematic diagram of the jaw assembly of one embodiment of the present invention reaching the locked ligation clamp 3 position from the clamping push state 2 position;

[0045] Fig.16 It is a schematic diagram of the elastic piece in the avoidance position 1 after the clamping operation according to one embodiment of the present invention;

[0046] Fig.17A is a schematic diagram of the positions of the resetting operation elastic sheet and the ratchet component according to an embodiment of the present invention;

[0047] Fig. 17B is an axial schematic diagram of a resetting operation elastic sheet and a ratchet component according to an embodiment of the present invention;

[0048] Fig.18 is a schematic structural diagram of a ratchet component according to an embodiment of the present invention;

[0049] Reference numerals,

[0050] Clamp head assembly 1, clamp head 11, first jaw position 111, second jaw position 112, third jaw position 113, outer tube 12, ligation clip 13, body assembly 2, trigger 21, first card slot 211, second card slot 212, first fixing point 213, first lock buckle 214, second lock buckle 215, trigger table 216, limiting rib plate table 217, trigger circular table 218, push-pull rod circular table 219, trigger cover plate 2 2. The second fixing point 221, the first locking hole 222, the second locking hole 223, the elastic sheet 23, the third slot 231, the fourth slot 232, the first reset slot 233, the second reset slot 234, the first bending angle 235, the second bending angle 236, the ratchet component 24, the ratchet 241, the ratchet sliding part 242, the ratchet back 243, the sliding component 25, the push-pull rod 251, the reset spring 252, and the buffer region 26; DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In this document, “upper”, “lower”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0053] In the following, the end of each component close to the operator is defined as the proximal end, and the end away from the operator is defined as the distal end. The expressions of the proximal end and the distal end are only used to make the description simple and clear, and should not be understood as any limitation to the present invention.

[0054] like Figure 1-18As shown, an embodiment of the present invention discloses a clip applier, comprising a clamp head assembly 1 and a body assembly 2, wherein the proximal end of the clamp head assembly 1 is connected to the distal end of the body assembly 2, the clamp head assembly 1 comprises a clamp head 11 and an outer tube 12, the outer tube 12 is sleeved on a ligation clip 13, the body assembly 2 comprises a trigger component, a ratchet component 24 and a sliding component 25, and the trigger component comprises a trigger body and an elastic component;

[0055] Pull the trigger body toward the proximal direction to drive the elastic component to jump in the ratchet component 24, so that the sliding component 25 slides toward the distal direction, thereby controlling the ligation clip 13 to close;

[0056] The trigger body is pushed toward the distal direction to drive the elastic component to jump in the ratchet component 24, so that the sliding component 25 slides toward the proximal direction, thereby controlling the ligation clip 13 to open.

[0057] Here, the trigger body includes a trigger 21 and a trigger cover plate 22, and the trigger cover plate 22 is buckled on the trigger 21;

[0058] The elastic component is an elastic sheet 23, which is bent twice to form a first bending angle 235 and a second bending angle 236. The trigger 21 is provided with a first slot 211 and a second slot 212. The first bending angle to the end portion is inserted into the first slot 211, and the area between the first bending angle and the second bending angle is inserted into the second slot 212. During installation, the two areas of the elastic sheet 23 are inserted as a whole into the first slot 211 and the second slot 212, respectively, so that the first slot 211 and the second slot 212 guide the elastic sheet 23 for assembly.

[0059] It should be noted that the angles of the first slot 211 and the second slot 212 are consistent with the bending angle of the elastic sheet 23 , so as to facilitate good positioning of the elastic sheet 23 .

[0060] The elastic sheet 23 includes a third slot 231 and a fourth slot 232 . The trigger 21 is correspondingly provided with a first fixing point 213 for fixing the fourth slot 232 . The trigger cover plate 22 is correspondingly provided with a second fixing point 221 for fixing the third slot 231 .

[0061] In the embodiment of the present invention, the design of the first fixed point 213 and the second fixed point 221 is adopted. When the elastic sheet 23 is installed in the first slot 211 and the second slot 212 of the trigger, the third slot 231 and the fourth slot 232 on the left and right of the elastic sheet 23 are correspondingly clamped on the first fixed point 213 and the second fixed point 221, which can be used to fix the axial position of the elastic sheet 23 and prevent the elastic sheet 23 from moving.

[0062] After the elastic sheet 23 is installed in the trigger 21, the trigger cover 22 is buckled on the trigger 21. The trigger 21 is provided with a first lock buckle 214 and a second lock buckle 215. The trigger cover 22 is correspondingly provided with a first lock buckle hole 222 and a second lock buckle hole 223. The first lock buckle 214 is buckled into the first lock buckle hole 222, and the second lock buckle 215 is buckled into the second lock buckle hole 223, so that one end of the elastic sheet 23 is fixed between the trigger cover 22 and the trigger 21.

[0063] In the embodiment of the present invention, the first locking hole 222 and the second locking hole 223 on the trigger cover plate 22 are tightly fitted and pressed into the corresponding first locking hole 214 and the second locking hole 215 on the trigger 21, thereby pressing and fixing the elastic sheet 23 inside, effectively preventing the elastic sheet 23 from moving to the left and right sides.

[0064] The elastic sheet 23 further includes a first reset groove 233 and a second reset groove 234 , which are respectively located on both sides of the second bending angle 236 and are distributed in a symmetrical structure.

[0065] There are two ratchet components 24, which are respectively located on both sides of the elastic sheet. The ratchet component 24 includes evenly distributed ratchets 241, a ratchet sliding portion 242, and a ratchet back portion 243. The ratchet component 24 and the body component 2 are integrated into an integrated structure.

[0066] The second bending angle 236 is placed on the two ratchet teeth 241 to perform a snapping movement; when performing a reset operation, the first reset groove 233 and the second reset groove 234 are in contact with the back of the ratchet 243 to perform a guiding movement.

[0067] Specifically, the first reset groove 233 and the second reset groove 234 cooperate with the ratchet back 243 of the ratchet part, and the elastic sheet 23 slides downward along the ratchet back 243 to reset. The symmetrical structure of the two ratchet parts 24 is adopted to ensure that the elastic sheet 23 is always subjected to balanced force during the movement, and always moves along the structure of the ratchet part 24. The force deformation of the elastic sheet 23 during the movement is also within a controllable range.

[0068] The sliding component 25 includes a push-pull rod 251 and a return spring 252 . The return spring 252 is sleeved on the push-pull rod 251 .

[0069] In the initial state, the trigger table 216 fits with the limiting rib table 217 , so as to limit the trigger angle, and the elastic sheet 23 and the ratchet component 24 are separated, and the elastic sheet 23 does not contact the ratchet component 24 .

[0070] The clamping operation process of the clamp applicator according to the embodiment of the present invention is as follows:

[0071] When the push-clamp operation is performed, the trigger 21 is pressed to rotate counterclockwise in the circumferential direction around the circular fixed column on the housing of the clamping forceps instrument, the trigger table 216 leaves the limiting rib table 217, the trigger circular table 218 contacts the push-pull rod circular table 219, and the push-pull rod 251 is pushed toward the distal direction, and the elastic sheet 23 rotates to the first ratchet tooth of the ratchet component 24. At this time, the ligation clamp 13 in the outer tube 12 is completely pushed to the first jaw position 111.

[0072] Since the return spring 252 abuts against the push-pull rod table 219 , when the push-pull rod 251 moves toward the distal end, the return spring 252 is compressed and stressed.

[0073] Here, the push-pull rod circular table 219 and the trigger circular table 218 are designed to be conformed to each other. The push-pull rod circular table 219 is a spherical surface, and the trigger circular table 218 is a concave spherical surface corresponding to the push-pull rod circular table 219.

[0074] Specifically, when the trigger 21 is closed and rotated, the second bending angle 236 of the elastic sheet 23 will cooperate with the ratchet of the ratchet component 24. The cooperation is designed to be a sliding tight fit, so that the trigger rotates counterclockwise, and at the same time serves the purpose of reverse locking, that is, when the trigger 21 compresses the return spring 252, the trigger 21 will not be affected by the reaction force of the return spring 252 and return to the initial position.

[0075] Here, when the elastic sheet 23 abuts against the first tooth of the ratchet component 24, a "click" sound can be clearly heard, which allows the operator to clearly know that the instrument is in a push-and-clamp operation state.

[0076] The embodiment of the present invention utilizes the good resilience of the elastic sheet 23 to keep it in meshing state with the first tooth of the ratchet component 24, so as to achieve a self-locking effect. At this time, when the trigger 21 is released, the trigger 21 can maintain the closed state and will not return to the initial position.

[0077] Continue to press the trigger 21, the push-pull rod circular table 219 always presses against the trigger circular table 218 in the proximal direction, so that the trigger 21 rotates and the push-pull rod 251 continues to move in the distal direction, and the reset spring 252 continues to be compressed and stressed. The elastic sheet 23 begins to slide over the ratchet teeth of the ratchet component 24 due to the pressing action of the trigger 21. This process is the process of the hand pressing the trigger 21 all the time. When the elastic sheet 23 is in meshing state with the last tooth of the ratchet component 24, the ligation clamp 13 in the outer tube 12 reaches the second position 112 of the jaws, and the ligation clamp 13 has reached the final position of the jaws, thereby completing the pushing and clamping operation. At this time, release the trigger 21, and the elastic sheet 23 is in contact with the root of the last tooth of the ratchet component 24 and realizes reverse locking.

[0078] It should be noted that when the spring sheet 23 reaches the first tooth, the closing clip does not appear at the jaw position. When sliding from the first ratchet tooth to the last ratchet tooth, the closing clip 13 is gradually pushed out during the movement.

[0079] The process of closing the clip applier is as follows:

[0080] After the clamping forceps completes the pushing and clamping operation, the trigger 21 continues to be pressed to rotate the trigger 21 and thus the push-pull rod 251 continues to move toward the distal direction, and the reset spring 252 continues to be compressed. At this time, since the elastic sheet 23 has moved through all the ratchet teeth of the ratchet component 24, the elastic sheet 23 is completely separated from the ratchet component 24, and the elastic sheet 23 rebounds from the deformation to the initial state. The trigger 21 closes and rotates to the final position, and the push-pull rod 251 continues to move forward, thereby driving the outer tube 12 to move forward together, so that the ligation clamp 13 completes the locking operation at the third position 113 of the jaws.

[0081] Here, when the elastic sheet 23 continues to move upward, but there is no ratchet on the upper part, the inventor has therefore provided a buffer zone 26 to effectively prevent misoperation. If the closing operation fails to lock the closing clip 13, the trigger 21 is released at this time, and the elastic sheet 23 will slide back into the buffer zone 26 of the ratchet component 24, thereby facilitating the doctor to timely correct and adjust the opening position of the ligation clip 13 during the operation.

[0082] Here, the installation position of the elastic sheet 23 and the ratchet component 24 should ensure that the elastic sheet 23 can reliably reversely lock the trigger 21 when it reaches each tooth root position on the ratchet component 24, and the force it can withstand is much greater than the reset force of the reset spring 252, thereby preventing the trigger 21 from reversing due to the reset force of the reset spring 252, which in turn affects the displacement, falling, skewing and other problems of the jaw ligation clamp, thereby avoiding the doctor's misoperation during the operation. This reliable mechanical structure is designed to improve the stability, reliability and safety of the instrument function and operation.

[0083] The procedure for clip reduction is as follows:

[0084] When the clamping forceps complete the clamping operation, the trigger 21 is released, and the push-pull rod 251 is reset to the proximal direction under the action of the rebound force of the reset spring 252, thereby driving the trigger 21 to reset together, thereby completing the reset of the elastic sheet 23.

[0085] The first reset groove 233 and the second reset groove 234 of the elastic piece 23 cooperate with the ratchet back 243 respectively, and the elastic piece 23 slides downward along the ratchet back 243 to reset. The force deformation of the elastic piece 23 during the movement is also within a controllable range.

[0086] At the same time, the push-pull rod 251 is reset to drive the clamp head assembly 1 to reset back to the initial state. At this time, the ligation clamp has completed the closing operation on the surgical tissue and remains in the body. The clamp applicator instrument has been reset and returned to the initial position as a whole, waiting for the next cycle of cyclic operation.

[0087] After adopting such a design, the present invention has at least the following advantages:

[0088] (1) The push-and-clamp operation process of the present invention can be stopped at any time by closing the trigger, so that the doctor can adjust the relative position of the instrument and the tissue at any time, thereby improving the quality of the operation.

[0089] (2) During the pushing and clamping process of the present invention, the elastic sheet and the ratchet component will produce a "click-click-click" sound prompt during the sliding process. When entering the clamping operation, the prompt sound disappears. The sound can remind the doctor of the two operating states of pushing and clamping and closing the clamp, which can serve as a safety warning during the operation of the instrument.

[0090] (3) The present invention has a simple structure, good effect, low cost and easy process implementation.

[0091] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the invention disclosed in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in the present invention. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0092] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A clip applier, comprising a clamp head assembly and a body assembly, wherein the proximal end of the clamp head assembly is connected to the distal end of the body assembly, the clamp head assembly comprises a clamp head and an outer tube, the outer tube is sleeved on a ligation clip, characterized in that: The body assembly includes a trigger assembly, a slide assembly and a ratchet component, and the trigger assembly includes a trigger body and an elastic component; Pulling the trigger body in the proximal direction drives the elastic component to jump in the ratchet component, causing the sliding component to slide in the distal direction, thereby controlling the ligation clip to close; The trigger body is pushed toward the distal direction to drive the elastic component to jump in the ratchet component, so that the sliding part slides toward the proximal direction, thereby controlling the ligation clip to open.

2. The clip applier according to claim 1, wherein: The trigger body comprises a trigger and a trigger cover plate, and the trigger cover plate is buckled on the trigger; The elastic component is an elastic sheet, the trigger is provided with a first slot and a second slot, and a part of the elastic sheet is located in the first slot and the second slot in the trigger; The elastic sheet includes a third slot and a fourth slot, the trigger is correspondingly provided with a first fixing point for fixing the fourth slot, and the trigger cover is correspondingly provided with a second fixing point for fixing the third slot.

3. The clip applier according to claim 2, wherein: The trigger cover plate being buckled onto the trigger means that the trigger is provided with a first lock buckle and a second lock buckle, and the trigger cover plate is correspondingly provided with a first lock buckle hole and a second lock buckle hole, the first lock buckle is buckled into the first lock buckle hole, and the second lock buckle is buckled into the second lock buckle hole.

4. The clip applier according to claim 3, wherein: The elastic sheet is bent twice to form a first bending angle and a second bending angle; the elastic sheet also includes a first reset groove and a second reset groove; the first bending angle to the end part is inserted into the first slot, and the area between the first bending angle and the second bending angle is inserted into the second slot.

5. The clip applier according to claim 4, wherein: The ratchet component comprises a ratchet, a ratchet sliding portion and a ratchet back portion; the end surface of the upper end portion of the ratchet component is evenly distributed with the ratchet teeth, and the ratchet back portion is a smooth structure.

6. The clip applier according to claim 5, wherein: The elastic sheet also includes a first reset groove and a second reset groove; the second bending angle is placed on the ratchet component to perform a snapping movement; when performing a reset operation, the first reset groove and the second reset groove are used to contact the back of the ratchet to perform a guiding movement.

7. The clip applier according to claim 6, wherein: The sliding part comprises a push-pull rod and a return spring, and the return spring is sleeved on the push-pull rod.

8. The clip applier according to claim 7, wherein: When the push-clamp operation is performed, the trigger is pressed to push the push-pull rod toward the distal direction, the reset spring is compressed and the elastic sheet rotates to the first ratchet tooth of the ratchet component. At this time, the ligation clamp is completely pushed to the first position of the jaws; the trigger is continued to be pressed, and the elastic sheet slides over the ratchet teeth of the ratchet component respectively. When the elastic sheet and the last tooth of the ratchet component are in meshing state, the ligation clamp reaches the second position of the jaws, completing the push-clamp operation.

9. The clip applier according to claim 8, wherein: When performing the clamping operation, the trigger is continuously pressed, the return spring continues to be compressed, the elastic sheet is completely separated from the ratchet of the ratchet component, the elastic sheet rebounds to the initial state, and slides along the buffer zone of the ratchet component, the trigger is closed and rotated to the final position, so that the ligation clamp completes the locking operation at the third position of the jaws.

10. The clip applier according to claim 9, wherein: When performing a reset operation, the trigger is released, and the first reset groove and the second reset groove of the elastic sheet respectively cooperate with the back of the ratchet, and the elastic sheet slides downward along the back of the ratchet to reset, thereby resetting the push-pull rod to the proximal direction, thereby completing the reset of the elastic sheet.

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