Clip applier with replaceable forceps rod

Abstract

The clip applier comprises a front sleeve, the front end of the front sleeve is connected with a fixing part of a clip head assembly, the rear end of the front sleeve is detachably connected with the front end of a rear sleeve, the rear end of the rear sleeve is connected with a push rod seat, a movable push rod and a front push rod are arranged in the front sleeve, a locking assembly is arranged in the rear sleeve, and the front push rod and the rear push rod are detachably connected. The front end of the movable push rod is connected with a driving part of the tong head assembly, the rear end of the movable push rod is connected with the front end of the front push rod, the rear end of the front push rod is detachably connected with the front end of the locking assembly, the front end of the rear push rod penetrates through the push rod base to be connected with the rear end of the locking assembly, a spring base is arranged at the rear end of the rear push rod, and the rear push rod is sleeved with a reset spring. The two ends of the reset spring abut against the rear end of the push rod base and the spring base respectively. The forceps rods are detachable, and the forceps rods and the forceps heads can be rapidly replaced so as to adapt to closing clamps of different specifications.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and in particular relates to a clamp applier with a replaceable clamp rod. Background Art

[0002] In general, each clip applier has a corresponding clamp head size and can only match one size of closing clip. When it is necessary to replace a closing clip of a different size, a clip applier of a different size needs to be used. Replacing the clip applier increases the operation time and increases the risk, so a clip applier that can be quickly replaced is needed to speed up the operation.

[0003] Some clip appliers have clamp heads of different sizes and clamp rod diameters of different sizes, which cannot match puncture devices of certain specifications. Therefore, it is particularly necessary to develop a clip applier with more flexible adaptability. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned defects of the prior art and provide a clip applier with a replaceable clamp rod.

[0005] The above-mentioned purpose of the present invention is achieved by the following technical means:

[0006] A clamping forceps with a replaceable clamp rod comprises a front sleeve, the front end of the front sleeve is connected to the fixed part of the clamp head assembly, the rear end of the front sleeve is detachably connected to the front end of the rear sleeve, the rear end of the rear sleeve is connected to the push rod seat, a movable push rod and a front push rod are arranged in the front sleeve, a locking assembly is arranged in the rear sleeve, the front end of the movable push rod is connected to the driving part of the clamp head assembly, the rear end of the movable push rod is connected to the front end of the front push rod, the rear end of the front push rod is detachably connected to the front end of the locking assembly, the front end of the rear push rod passes through the push rod seat and is connected to the rear end of the locking assembly, a spring seat is arranged at the rear end of the rear push rod, a return spring is sleeved on the rear push rod, and two ends of the return spring are respectively against the rear end of the push rod seat and the spring seat.

[0007] The locking assembly includes a locking structure housing, a limit housing, a ball guide, a locking spring, a ball, and a locking needle.

[0008] The rear end of the front push rod is connected to the locking needle connecting plate, and the locking needle connecting plate is connected to the locking needle.

[0009] The outer wall of the limit shell is provided with a locking structure shell, the front end of the limit shell is a hollow conical portion, and the diameter of the conical portion gradually decreases from the rear end of the conical portion to the front end direction, the front end of the rear push rod extends into the rear end of the limit shell and is fixed to the rear end of the limit shell, the ball guide is located in the limit shell, the rear end of the locking spring is in contact with the front end of the rear push rod, the front end of the locking spring is in contact with the rear end of the ball guide, the front end shape of the ball guide is adapted to the front end shape of the limit shell, a ball guide hole is provided on the front end side wall of the ball guide, a ball is provided in the ball guide hole, an axial guide hole is provided on the front end face of the ball guide, the locking needle is inserted into the axial guide hole and extends to the bottom of the ball guide hole, when the ball is at the bottom of the ball guide hole, the arc needle head of the locking needle lifts the ball in the ball guide hole, and the ball part is exposed from the ball guide hole and pressed against the inner wall of the conical portion of the limit shell.

[0010] The ball guide hole is perpendicular to the axial direction of the limiting shell.

[0011] The locking structure shell and the front side wall of the limit shell are both provided with a locking component top window, and the rear end of the ball guide is provided with a guide block, which is located on the inner side of the locking component top window, and the inner end of the buckle shell is connected to the side wall of the front end of the rear sleeve, and one end of the button rod is movable through the through hole on the outer end surface of the buckle shell, the through hole on the inner end surface of the buckle shell, and the through hole on the tube wall of the rear sleeve in sequence, extending to the tube of the rear sleeve and connected with the card plate, and the rear end of the card plate is provided with an extrusion block, and the extrusion block is provided with an extrusion block inclined surface, and the part of the button rod located in the buckle shell is sleeved and fixed with a side wing plate, and the two ends of the buckle spring are respectively in contact with the side wing plate and the inner wall of the inner end of the buckle shell.

[0012] When the button rod is pressed toward the rear sleeve, the card plate and the extrusion block are driven to move toward the axis of the rear sleeve, and the extrusion block passes through the top window of the locking assembly on the locking structure shell and the limit shell. The extrusion block inclined surface on the extrusion block pushes the guide block, driving the ball guide to move away from the front end of the limit shell, so that the ball is separated from the inner wall of the truncated cone.

[0013] A card plate buckle is provided at the front end of the card plate, an engaging recess is provided at the rear end of the front sleeve, and an engaging protrusion is provided at the front end of the rear sleeve. When the engaging protrusion is inserted into the engaging recess, the front end beveled card head of the card plate buckle is inserted into the front sleeve fixing hole on the rear end side wall of the front sleeve from the inside of the rear end of the front sleeve. When the button rod is pressed toward the rear sleeve, the card plate and the card plate buckle are driven to move toward the axis of the rear sleeve, and the front end beveled card head of the card plate buckle is disengaged from the front sleeve fixing hole.

[0014] The handle assembly also includes a fixed handle, a movable handle, a pin and a push rod seat. The fixed handle and the movable handle are hingedly connected by a pin. A push rod seat connecting piece is arranged on the top of the fixed handle. The front end of the push rod seat connecting piece is connected to the rear end of the push rod seat. A guide groove is arranged on the push rod seat connecting piece. The rear end of the rear push rod passes through the push rod seat and is located in the guide groove of the push rod seat connecting piece. A pushing block is arranged on the top of the movable handle. The pushing block is located in a spring seat groove arranged on the side wall of the spring seat. When the movable handle is tightened toward the fixed handle, the pushing block is stuck in the spring seat groove and pushes the spring seat to move toward the front end of the spring seat. When the movable handle is released, under the action of the restoring force of the reset spring, the spring seat drives the rear push rod to reset toward the rear end of the rear push rod.

[0015] The rear end of the rear sleeve is provided with an external thread, the front end of the push rod seat is provided with a rear sleeve mounting hole, the rear sleeve mounting hole is provided with an internal thread that matches the rear end external thread of the rear sleeve, and the rear end of the rear sleeve is connected to the front end of the push rod seat through threads.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the clamp rod of the present invention is detachable, and the clamp rod and clamp head can be quickly replaced to adapt to closing clamps of different specifications. Clamp heads and clamp rods of different sizes can flexibly adapt to puncture devices of various specifications, and have a wide range of applications. The clamp rod assembly is connected by a locking assembly, and when replacement is required, the clamp rod can be separated by pressing the button rod of the locking assembly, which is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the clamp rod assembly of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the clamp rod assembly of the present invention, with the locking assembly and the sleeve assembly state hidden;

[0020] Figure 4 It is a schematic diagram of the structure of the clamp rod assembly of the present invention, with the locking assembly hidden and the sleeve separated;

[0021] FIG5(a) is a schematic diagram of the locking state structure of the locking assembly of the present invention, and FIG5(b) is a partial enlarged view of FIG5(a);

[0022] FIG6( a ) is a schematic structural diagram of the unlocked state of the locking assembly of the present invention, and FIG6( b ) is a partial enlarged view of FIG6( a );

[0023] FIG7(a) is a schematic structural diagram of the locking assembly of the present invention in a state where the pliers rod assembly is locked, and FIG7(b) and FIG7(c) are partial enlarged views of FIG7(a);

[0024] FIG8(a) is a schematic structural diagram of a state in which a lock assembly of the present invention unlocks a clamp rod assembly, and FIG8(b) and FIG8(c) are partial enlarged views of FIG8(a);

[0025] Fig. 9 This is a structural schematic diagram of the state in which the lock assembly of the present invention unlocks the clamp rod assembly and the clamp rod assembly sleeve is separated;

[0026] Fig.10 It is a structural schematic diagram of the clamp head assembly of the present invention in the open and closed state;

[0027] Fig.11 It is a structural schematic diagram of the clamp head assembly of the present invention in a closed state;

[0028] FIG12 is a schematic structural diagram of the handle assembly of the present invention in an open and closed state, and FIG12(b) is a partial enlarged view of FIG12(a);

[0029] FIG13 is a schematic structural diagram of the handle assembly of the present invention in a closed state, and FIG13( b ) is a partial enlarged view of FIG13( a ).

[0030] In the figure: 1-clamp head assembly, 2-clamp rod assembly, 21-sleeve assembly, 211-front sleeve, 211.1-embedded recessed portion, 211.2-front sleeve fixing hole, 212-rear sleeve, 212.1-embedded raised portion, 22-push rod assembly, 221-movable push rod, 222-front push rod, 223-rear push rod, 224-spring seat, 224.1-spring seat groove, 225-reset spring, 226-locking assembly, 226.1-locking assembly top window, 226.2-locking needle connection port, 2261-locking structure housing, 2262-limit housing, 2262.1-cone inner wall, 226 3-ball guide, 2263.1-guide block, 2263.2-ball guide hole, 2263.3-axial guide hole, 2264-locking spring, 2265-ball, 2266-locking needle, 2267-locking needle connecting plate, 3-locking assembly, 31-buckle housing, 32-button rod, 32.1-side wing plate, 33-buckle spring, 34-card, 34.1-card buckle, 34.2-extrusion block, 34.3-extrusion block inclined surface, 4-handle assembly, 41-fixed handle, 41.1-push rod seat connector, 42-movable handle, 42.1-push block, 43-pin, 44-push rod seat. DETAILED DESCRIPTION

[0031] In order to facilitate those skilled in the art to understand and implement the present invention, the present invention is further described in detail below in conjunction with embodiments. It should be understood that the implementation examples described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0032] Embodiment 1:

[0033] A clamping forceps with replaceable clamp rods, comprising a clamp head assembly 1, a clamp rod assembly 2, a lock assembly 3, and a handle assembly 4, such as Figure 1 The clamp rod assembly 2 includes a sleeve assembly 21 and a push rod assembly 22 . The sleeve assembly 21 is slidably connected to the push rod assembly 22 . The push rod assembly 22 moves in the sleeve assembly 21 along the axial direction of the sleeve assembly 21 .

[0034] In some embodiments, the sleeve assembly 21 includes a front sleeve 211 and a rear sleeve 212, the front end of the front sleeve 211 is connected to the fixing portion of the clamp head assembly 1, the rear end of the front sleeve 211 is provided with a fitting recess 211.1, and the front end of the rear sleeve 212 is provided with a fitting protrusion 212.1, and the fitting protrusion 212.1 is inserted into the fitting recess 211.1, so that the front sleeve 211 and the rear sleeve 212 can only move along the axial direction of the clamp rod assembly 2, such as Figures 3-4 The rear end of the rear sleeve 212 is provided with an external thread, the front end of the push rod seat 44 is provided with a rear sleeve mounting hole, the rear sleeve mounting hole is provided with an internal thread that matches the rear end external thread of the rear sleeve 212, the rear end of the rear sleeve 212 is connected to the front end of the push rod seat 44 through threads, and the rear end of the push rod seat 44 is fixedly connected to the front end of the push rod seat connector 41.1 provided at the top of the fixed handle 41.

[0035] In some embodiments, the push rod assembly 22 includes a movable push rod 221, a front push rod 222, a rear push rod 223, a spring seat 224, a return spring 225 and a locking assembly 226. The front end of the movable push rod 221 is provided with a push head, the push head is connected to the driving part of the clamp head assembly 1, and the rear end of the movable push rod 221 is threadedly connected to the front end of the front push rod 222.

[0036] In some embodiments, the rear end of the front push rod 222 is connected to the locking needle connecting plate 2267, and the locking needle connecting plate 2267 is connected to the locking needle 2266. The front end of the rear push rod 223 extends into the rear end of the limiting shell 2262 and is fixed to the rear end of the limiting shell 2262. The locking structure shell 2261 is arranged outside the limiting shell 2262. The front end surface of the limiting shell 2262 and the front end surface of the locking structure shell 2261 are provided with a locking needle connecting port 226.2 at the same position. The rear end of the rear push rod 223 is fixedly connected to the spring seat 224. One end of the return spring 225 is in contact with the spring seat 224, and the other end is in contact with the rear end of the push rod seat 44. The rear push rod 223 can slide freely inside the push rod seat 44. The return spring 225 pushes the spring seat 224 away from the push rod seat 44 under the action of the elastic force. Figure 2 and Figure 5(a).

[0037] In some embodiments, the locking assembly 226 includes a locking structure housing 2261, a position limiting housing 2262, a ball guide 2263, a locking spring 2264, a ball 2265, and a locking pin 2266. The outer wall of the position limiting housing 2262 is provided with a locking structure housing 2261 of the same structure but different materials, and the locking structure housing 2261 and the front side wall of the position limiting housing 2262 are both provided with a locking assembly top window 226.1; the front end of the position limiting housing 2262 is a hollow truncated cone portion, and the diameter of the truncated cone portion gradually decreases from the rear end of the truncated cone portion to the front end.

[0038] The ball guide 2263 is located inside the limiting housing 2262 and can slide freely along the axial direction of the limiting housing 2262. The front end shape of the ball guide 2263 matches the front end shape of the limiting housing 2262. The front end side wall of the ball guide 2263 is provided with a ball guide hole 2263.2, which is perpendicular to the axial direction of the limiting housing 2262. A ball 2265 is arranged in the ball guide hole 2263.2, and the ball 2265 can roll along the ball guide hole. The rear end of the ball guide 2263 is provided with a guide block 2263.1, which is located inside the top window 226.1 of the locking assembly. The ball guide 2263 can slide along the axial direction of the limiting housing 2262 in the limiting housing 2262. The front end surface of the ball guide 2263 is provided with an axial guide hole 2263.3, which is communicated with the ball guide hole 2263.2. The locking needle 2266 passes through the locking needle connection port 226.2 on the front end surface of the locking structure housing 2261 and the limiting housing 2262, is inserted into the axial guide hole 2263.3, and slides along the axial guide hole 2263.3 until the front end of the locking structure housing 2261 abuts against the locking needle connection plate 2267 connected to the locking needle 2266. The locking structure housing 2261 can push the locking needle 2266 to move.

[0039] The rear end of the locking spring 2264 is in contact with the front end of the rear push rod 223 , and the front end of the locking spring 2264 is in contact with the rear end of the ball guide 2263 . The locking spring 2264 presses the ball guide 2263 toward the front end of the limiting housing 2262 . The locking needle 2266 is inserted into the axial guide hole 2263.3 and extends to the bottom of the ball guide hole 2263.2. When the ball 2265 is at the bottom of the ball guide hole 2263.2, the arc needle head of the locking needle 2266 abuts against the arc surface of the ball 2265 toward the bottom of the ball guide hole 2263.2, so that the ball 2265 is lifted in the ball guide hole 2263.2, and the ball 2265 is partially exposed from the ball guide hole 2263.2 and pressed against the inner wall 2262.1 of the truncated cone portion. At this time, friction can be generated between the ball 2265 and the locking needle 2266, so that the ball 2265 and the locking needle 2266 will not slide relative to each other, as shown in Figures 5(a) and 5(b). When the ball guide 2263 moves in the reverse direction, the ball 2265 cannot contact the locking needle 2266 and the inner wall 2262.1 of the truncated cone at the same time. At this time, no friction force can be generated between the ball 2265 and the locking needle 2266, and sliding can occur between the ball 2265 and the locking needle 2266, as shown in Figures 6(a) and 6(b).

[0040] The lock assembly 3 includes a buckle housing 31, a button rod 32, a buckle spring 33, and a card plate 34. The inner end of the buckle housing 31 (the end of the buckle housing 31 facing the rear sleeve 212 is the inner end, and the end away from the rear sleeve 212 is the outer end) is connected to the side wall of the front end of the rear sleeve 212, and one end of the button rod 32 is movable through the through hole on the outer end surface of the buckle housing 31, the through hole on the inner end surface of the buckle housing 31, and the through hole on the tube wall of the rear sleeve 212 in sequence, extending to the inside of the rear sleeve 212 and connected to the card plate 34, the front end of the card plate 34 is provided with a card plate buckle 34.1, the rear end of the card plate 34 is provided with an extrusion block 34.2, and the extrusion block 34.2 is provided with an extrusion block inclined surface 34.3. The part of the button rod 32 located in the buckle housing 31 is sleeved and fixed with a side wing plate 32.1, and the two ends of the buckle spring 33 are respectively in contact with the side wing plate 32.1 and the inner wall of the inner end of the buckle housing 31, as shown in Figures 7(a), 7(b) and 7(c).

[0041] The front end of the card plate buckle 34.1 is a beveled card head. The front end of the rear sleeve 212 is aligned with the rear end of the front sleeve 211. When the engaging protrusion 212.1 is inserted into the engaging recess 211.1, the beveled card head at the front end of the card plate buckle 34.1 is inserted from the rear end of the front sleeve 211 into the front sleeve fixing hole 211.2 on the rear end side wall of the front sleeve 211. When the button rod 32 is pressed toward the rear sleeve 212, the card plate 34 and the card plate buckle 34.1 are driven to move toward the axis of the rear sleeve 212, and the beveled card head at the front end of the card plate buckle 34.1 is disengaged from the front sleeve fixing hole 211.2, as shown in Figures 8(a), 8(b) and 8(c).

[0042] When the button rod 32 is pressed toward the rear sleeve 212, the card plate 34 and the extrusion block 34.2 are driven to move toward the axis of the rear sleeve 212. The extrusion block 34.2 passes through the locking assembly top window 226.1 on the locking structure housing 2261 and the limiting housing 2262. The extrusion block inclined surface 34.3 on the extrusion block 34.2 pushes the guide block 2263.1, driving the ball guide 2263 to move away from the front end of the limiting housing 2262, so that the ball 2265 is separated from the inner wall 2262.1 of the truncated cone, and then the ball 2265 is separated from the extrusion connection with the locking needle 2266, and the locking needle 2266 can be pulled out from the axial guide hole 2263.3. The disassembly between the front sleeve 211 and the rear sleeve 212 is realized, such as Fig. 9 .

[0043] When the button rod 32 is released, under the restoring force of the snap spring 33, the button rod 32 is bounced up in the direction away from the rear sleeve 212, the extrusion block 34.2 does not squeeze the guide block 2263.1, and under the restoring force of the locking spring 2264, the front end of the ball guide 2263 is against the front end of the limit housing 2262.

[0044] The fixing part of the clamp head assembly 1 is connected to the front end of the front sleeve 211, the driving part of the clamp head assembly 1 is connected to the push head at the front end of the movable push rod 221, the rear end of the movable push rod 221 is connected to the front end of the front push rod 222, the rear end of the front push rod 222 is connected to the locking needle connecting plate 2267, the locking needle connecting plate 2267 is connected to the locking needle 2266, and the locking needle 2266 is installed and fixed in the axial guide hole 2263.3, and is driven by the rear push rod 223 to move forward and backward. The forward and backward movement of the rear push rod 223 drives the driving part of the clamp head assembly 1 to move forward and backward, thereby realizing the opening and closing of the clamp head of the clamp head assembly 1. Figures 10-11 The clamp head assembly 1 is an existing component, and its structure is not described in detail in the present invention.

[0045] In some embodiments, the handle assembly 4 includes a fixed handle 41, a movable handle 42, a pin 43 and a push rod seat 44. The fixed handle 41 and the movable handle 42 are hingedly connected by the pin 43. A push rod seat connector 41.1 is provided at the top of the fixed handle 41. The front end of the push rod seat connector 41.1 is connected to the rear end of the push rod seat 44, and a guide groove is provided on the push rod seat connector 41.1. The rear end of the rear push rod 223 passes through the push rod seat 44 and is located in the guide groove of the push rod seat connecting piece 41.1. A pushing block 42.1 is arranged on the top of the movable handle 42. When the movable handle 42 is installed, the pushing block 42.1 is located in the spring seat groove 224.1 arranged on the side wall of the spring seat 224. When the movable handle 42 is tightened toward the fixed handle 41, the pushing block 42.1 is clamped in the spring seat groove 224.1 to push the spring seat 224 to move toward the front end of the spring seat 224, thereby driving the rear push rod 223 to move toward the front end of the rear push rod; when the movable handle 42 is released, under the action of the restoring force of the reset spring 225, the spring seat 224 drives the rear push rod 223 to reset toward the rear end of the rear push rod, as shown in Figures 12(a), 12(b), 13(a) and 13(b).

[0046] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

[0047] It should be noted that the embodiments described in the present invention are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A clip applier with a replaceable clamp rod, comprising a front sleeve (211), characterized in that: The front end of the front sleeve (211) is connected to the fixed part of the clamp head assembly (1), the rear end of the front sleeve (211) is detachably connected to the front end of the rear sleeve (212), the rear end of the rear sleeve (212) is connected to the push rod seat (44), a movable push rod (221) and a front push rod (222) are arranged in the front sleeve (211), a locking assembly (226) is arranged in the rear sleeve (212), the front end of the movable push rod (221) is connected to the driving part of the clamp head assembly (1), and the movable push rod (222) is connected to the front end of the front sleeve (211). The rear end of the rear push rod (223) is connected to the front end of the front push rod (222), the rear end of the front push rod (222) is detachably connected to the front end of the locking assembly (226), the front end of the rear push rod (223) passes through the push rod seat (44) and is connected to the rear end of the locking assembly (226), the rear end of the rear push rod (223) is provided with a spring seat (224), the rear push rod (223) is sleeved with a return spring (225), and the two ends of the return spring (225) are respectively against the rear end of the push rod seat (44) and the spring seat (224).

2. A clip applier with replaceable clamp rod according to claim 1, characterized in that: The locking assembly (226) comprises a locking structure housing (2261), a limiting housing (2262), a ball guide (2263), a locking spring (2264), a ball (2265), and a locking needle (2266). The rear end of the front push rod (222) is connected to the locking needle connecting plate (2267), and the locking needle connecting plate (2267) is connected to the locking needle (2266). The outer wall of the limiting shell (2262) is provided with a locking structure shell (2261), the front end of the limiting shell (2262) is a hollow truncated cone portion, and the diameter of the truncated cone portion gradually decreases from the rear end to the front end direction, the front end of the rear push rod (223) extends into the rear end of the limiting shell (2262) and is fixed to the rear end of the limiting shell (2262), the ball guide (2263) is located in the limiting shell (2262), the rear end of the locking spring (2264) is in contact with the front end of the rear push rod (223), the front end of the locking spring (2264) is in contact with the rear end of the ball guide (2263), the front end shape of the ball guide (2263) is adapted to the front end shape of the limiting shell (2262), and the front end of the ball guide (2263) is in contact with the front end of the ball guide (2263). A ball guide hole (2263.2) is provided on the end side wall, a ball (2265) is arranged in the ball guide hole (2263.2), an axial guide hole (2263.3) is provided on the front end surface of the ball guide member (2263), a locking needle (2266) is inserted into the axial guide hole (2263.3) and extends to the bottom of the ball guide hole (2263.2), when the ball (2265) is at the bottom of the ball guide hole (2263.2), the arc needle head of the locking needle (2266) lifts the ball (2265) in the ball guide hole (2263.2), and the ball (2265) is partially exposed from the ball guide hole (2263.2) and pressed against the inner wall (2262.1) of the truncated cone portion of the limiting housing (2262).

3. A clip applier with replaceable clamp rod according to claim 2, characterized in that: The ball guide hole (2263.2) is perpendicular to the axial direction of the limiting housing (2262).

4. A clip applier with replaceable clamp rod according to claim 2, characterized in that: The front side walls of the locking structure housing (2261) and the limiting housing (2262) are both provided with a locking component top window (226.1), the rear end of the ball guide (2263) is provided with a guide block (2263.1), the guide block (2263.1) is located inside the locking component top window (226.1), the inner end of the buckle housing (31) is connected to the side wall of the front end of the rear sleeve (212), one end of the button rod (32) is movable through the through hole on the outer end surface of the buckle housing (31), the buckle housing ( The through hole on the inner end surface of the button rod (31) and the through hole on the tube wall of the rear sleeve (212) extend into the tube of the rear sleeve (212) and are connected to the clamping plate (34); a squeeze block (34.2) is provided at the rear end of the clamping plate (34); a squeeze block inclined surface (34.3) is provided on the squeeze block (34.2); a side wing plate (32.1) is fixedly sleeved on the part of the button rod (32) located in the buckle shell (31); two ends of the buckle spring 33 are respectively in contact with the inner wall of the inner end of the side wing plate (32.1) and the buckle shell (31); When the button rod (32) is pressed toward the rear sleeve (212), the clamping plate (34) and the extrusion block (34.2) are driven to move toward the axis of the rear sleeve (212), and the extrusion block (34.2) passes through the top window (226.1) of the locking assembly on the locking structure shell (2261) and the limiting shell (2262), and the extrusion block inclined surface (34.3) on the extrusion block (34.2) pushes the guide block (2263.1), driving the ball guide (2263) to move away from the front end of the limiting shell (2262), so that the ball (2265) is separated from the inner wall (2262.1) of the truncated cone.

5. A clip applier with replaceable clamp rod according to claim 4, characterized in that: The front end of the clamping plate (34) is provided with a clamping plate buckle (34.1), the rear end of the front sleeve (211) is provided with an engaging recessed portion (211.1), and the front end of the rear sleeve (212) is provided with an engaging protruding portion (212.1). When the engaging protruding portion (212.1) is inserted into the engaging recessed portion (211.1), the front end of the clamping head with an inclined surface of the clamping plate buckle (34.1) is inserted into the front end of the clamping plate fixing hole (211.2) on the rear end side wall of the front sleeve (211) from the rear end of the front sleeve (211). When the button rod (32) is pressed toward the rear sleeve (212), the clamping plate (34) and the clamping plate buckle (34.1) are driven to move toward the axis of the rear sleeve (212), and the front end of the clamping head with an inclined surface of the clamping plate buckle (34.1) is disengaged from the front sleeve fixing hole (211.2).

6. The clip applier with replaceable clamp rod according to claim 1, characterized in that: The invention also comprises a handle assembly (4), wherein the handle assembly (4) comprises a fixed handle (41), a movable handle (42), a pin (43) and a push rod seat (44), wherein the fixed handle (41) and the movable handle (42) are hingedly connected via the pin (43), a push rod seat connecting piece (41.1) is arranged at the top end of the fixed handle (41), a front end of the push rod seat connecting piece (41.1) is connected to a rear end of the push rod seat (44), a guide groove is arranged on the push rod seat connecting piece (41.1), and a rear end of the rear push rod (223) passes through the push rod seat (44) and is located in the guide groove of the push rod seat connecting piece (41.1) A pushing block (42.1) is arranged on the top of the movable handle (42), and the pushing block (42.1) is located in a spring seat groove (224.1) arranged on the side wall of the spring seat (224). When the movable handle (42) is tightly grasped toward the fixed handle (41), the pushing block (42.1) is clamped in the spring seat groove (224.1) to push the spring seat (224) to move toward the front end of the spring seat (224); when the movable handle (42) is released, under the action of the restoring force of the reset spring (225), the spring seat (224) drives the rear push rod (223) to reset toward the rear end of the rear push rod.

7. The clip applier with replaceable clamp rod according to claim 1, characterized in that: The rear end of the rear sleeve (212) is provided with an external thread, the front end of the push rod seat (44) is provided with a rear sleeve mounting hole, the rear sleeve mounting hole is provided with an internal thread that matches the rear end external thread of the rear sleeve (212), and the rear end of the rear sleeve (212) is connected to the front end of the push rod seat (44) through threads.

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