Continuous clip applier

Abstract

The utility model discloses a running clip applier, including rotary handle, fixed handle and insurance subassembly, rotary handle includes rotary portion, rotary portion rotatablely connected with fixed handle, insurance subassembly includes shell, a pair of safety pin and first spring, shell is provided in the rotary portion, and the first spring is provided in the shell. The pair of safety pins are arranged in the shell, the first spring is clamped between the pair of safety pins, the safety pins are provided with clamping tables, an inner end face is formed in the shell, the fixed handle is further provided with a safety hole, and when the safety assembly enters a locking state, the clamping tables are clamped in the inner end face. When the rotating part rotates to the position where the safety pin and the safety hole are coaxial, the safety pin slides to the clamping table to abut against the inner end face under pushing of the first spring, and therefore the safety pin is partially clamped in the safety hole. The continuous shooting clip applier can prevent the ligation end from being triggered by mistake in the process of entering a puncture outfit and an abdominal cavity, and the use experience is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a continuous clip applier. Background Art

[0002] A ligating clip is a commonly used surgical instrument for clamping operations in surgical procedures, used to clamp blood vessels to achieve hemostasis. In medical surgeries, especially minimally invasive techniques, when a patient is bleeding, after taking hemostatic drugs, a clip applicator is used to clamp the large blood vessels to prevent blood from flowing out. A continuous clip applier is an instrument for continuously applying ligating clips to a target position, including a rotating handle, a tube rod, a jaw head installed at the ligating end of the tube rod, a fixed handle, and a rotating handle, and further includes a push-pull rod and a feeding device. The rotating handle is rotatably connected to the fixed handle, and one end of the rotating handle abuts against the feeding device and acts on the feeding device to open or clamp the jaw head. Further, a spring plate is provided on the rotating handle, and a one-way rack is provided at a position corresponding to the spring plate inside the fixed handle. When the rotating handle rotates, it drives the spring plate to continuously jump between adjacent teeth on the rack, so that the continuous clip applier can achieve continuous firing.

[0003] During the operation of the existing continuous clip applier, it is necessary to first insert the continuous clip applier in a non-firing state into the surgical operation area in the abdominal cavity through a puncture cannula. Therefore, the operator needs to first gently hold the rotating handle to slightly clamp the jaw head, so as to facilitate the jaw head to be sent to the operation area through the puncture cannula, and then release the rotating handle to make the jaw head reopen at the target for ligation operation. However, the force when gently holding the rotating handle is usually very difficult to control. If the operator uses too much force, it is very likely that the continuous clip applier will enter the firing state in advance. Since the movement between the spring plate and the rack is only one-way, at this time, the operator can only continuously press the push-pull rod to completely fire the continuous clip applier and cannot exit the firing state. In addition, even if the operator does not make mistakes during the operation, the operator still needs to continuously apply a gripping force to the rotating handle during the process of inserting the continuous clip applier into the abdominal cavity to keep the jaw head slightly clamped, consuming the physical strength of the operator and resulting in a poor user experience. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a continuous clip applier, which can prevent accidental firing during the process of the ligating end entering the puncture device and the abdominal cavity, and has a better user experience.

[0005] The utility model is realized through the following technical solutions:

[0006] A continuous firing clip applicator, comprising a rotating handle, a fixed handle and a ligation end. The rotating handle includes a rotating part, an abutting part and a spring piece. The rotating part is rotatably connected to the fixed handle. The abutting part and the spring piece are fixedly connected to the rotating part. A one-way rack is provided on the fixed handle. When the spring piece rotates with the rotating part to be buckled with the one-way rack, the abutting part pushes the ligation end into a firing state;

[0007] The continuous firing clip applicator further includes a safety component. The safety component is received in the rotating part and includes a housing, a pair of safety pins and a first spring. The pair of safety pins are slidably arranged in the housing. The first spring is clamped between the pair of safety pins. A clamping table is provided on the safety pin. A sliding groove is formed in the housing. The clamping table can slide in the sliding groove. A safety hole is formed through the fixed handle. When the rotating part rotates to make the safety pin coaxial with the safety hole, the safety pin slides outwards under the push of the first spring, resulting in the clamping table abutting against the sliding groove and at the same time part of the safety pin being clamped in the safety hole to prevent the spring piece from being buckled with the one-way rack and prevent the ligation end from entering the firing state.

[0008] Further, the safety pin includes a pin head part. When the rotating part rotates to the position where the safety pin is coaxial with the safety hole, part of the pin head part is stuck in the safety hole.

[0009] Further, when the safety pin is not in a coaxial state with the safety hole, the safety component is in a free state. When the safety pin is in a coaxial state with the safety hole, the safety component is in a locked state. When the safety component enters the free state from the locked state and the spring piece is buckled with the one-way rack, the ligation end enters the firing state.

[0010] Further, the pin head part further includes a first end face. The fixed handle forms a first inner wall. When the safety component is in a free state, the first end face slides on the first inner wall.

[0011] Further, the safety pin further includes a pin body part. A sliding cavity penetrates through the housing. The pin body part is movably arranged in the sliding cavity.

[0012] Further, the pin body part further includes a second end part. A spring hole is formed in the second end part. The first spring abuts against the spring hole.

[0013] Further, the sliding groove is formed on the inner surface of the sliding cavity. The clamping table extends into the sliding groove and moves in the sliding groove.

[0014] Further, an inner end face is formed in the sliding groove, the clamping table is arranged on the pin body part, and when the safety pin is locked with the safety hole, the clamping table abuts against the inner end face.

[0015] Further, the rotating part further includes a mounting hole, and the housing is clamped in the mounting hole and rotates together with the rotating part.

[0016] Further, the housing includes a fourth end face, and the pin head protrudes from the fourth end face.

[0017] Compared with the prior art, the advantages of the present utility model are as follows:

[0018] 1. By arranging a safety component on the rotating handle, the rotating handle can be locked before the continuous clip applicator enters the firing state, and then the operator can decide whether to continue firing by himself, effectively avoiding the problem of premature firing caused by operation errors.

[0019] 2. After entering the locked state, the safety component can continuously maintain this state, so that the jaws of the continuous clip applicator remain slightly clamped during the insertion into the trocar, without the need to continuously apply a gripping force, saving the physical strength of the operator and improving the use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the installation relationship among the ligation end, the handle end and the safety device in a continuous clip applicator according to an embodiment of the present utility model;

[0021] Figure 2 For Figure 1 Enlarged view of part A in

[0022] Figure 3 For Figure 1 Schematic diagram of the handle end of the continuous clip applicator in the firing state in

[0023] Figure 4 For Figure 1 Side sectional view of the safety device in

[0024] Figure 5 For Figure 4 Partial view of the exploded view of

[0025] Figure 6 For Figure 1 Schematic diagram of the handle end of the safety device in the unlocked state in

[0026] Figure 7 For Figure 2 Partial sectional view of the C-C cross-section in

[0027] Figure 8 For Figure 6 Partial sectional view of the B-B cross-section in

[0028] 1. Handle end; 11. Rotating handle; 110. Rotating axis; 111. Rotating portion; 112. Abutting portion; 113. Pressing portion; 114. Spring; 115. Abutting end; 116. Mounting hole; 12. Fixed handle; 121. Safety hole; 122. First inner wall; 123. One-way rack; 124. First tooth tip; 2. Safety assembly; 201. First gap; 202. Second gap; 203. Bottom surface; 204. Fourth end surface; 21. Shell Body; 211, sliding cavity; 212, sliding groove; 213, inner end surface; 22, safety pin; 221, pin head; 222, pin body; 223, locking surface; 224, first end surface; 225, clamping platform; 226, third end surface; 227, inclined surface; 228, second end; 229, spring hole; 23, first spring; 3, ligating end; 31, clamp rod assembly; 311, jaws; 32, burst push rod; 33, push cylinder; 34, second spring. DETAILED DESCRIPTION

[0029] The following non-limiting detailed description of the technical solution of the utility model is provided in conjunction with preferred embodiments and their accompanying drawings. In the description of the utility model, it should be understood that terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate positions or locations based on the positions or locations shown in the accompanying drawings. Furthermore, the terms "first spring" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, features specified as "first spring" and "second" may explicitly or implicitly include at least one of such features. In the description of the utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the utility model and should not be construed as limiting the scope of the utility model.

[0030] like Figure 1As shown in the figure, a continuous clip applicator according to an embodiment of the present utility model includes a handle end 1, a safety component 2, and a ligation end 3. The handle end 1 includes a rotating handle 11 and a fixed handle 12. The rotating handle 11 is in the shape of a long strip with a special shape, and includes a rotating portion 111, an abutting portion 112, and a pressing portion 113. The rotating portion 111 is located between the abutting portion 112 and the pressing portion 113, and further includes a rotating shaft 110. The rotating portion 111 is rotatably connected to the fixed handle 12 through the rotating shaft 110. An installation hole 116 is formed through the rotating portion 111, and the safety component 2 is installed in the installation hole 116 by interference fit and rotates together with the rotating portion 111. As Figure 2 shown, a part of the pressing portion 113 extends out of the fixed handle 12 for gripping, and the abutting portion 112 abuts against the side of the push tube 33 away from the forceps rod assembly 31. The rotating handle 11 further includes a spring piece 114. The spring piece 114 is made of a metal material, and one end is fixed to the rotating portion 111 by a screw. A one-way rack 123 is formed at a position corresponding to the spring piece 114 in the fixed handle 12. The one-way rack 123 is arc-shaped. As Figure 3 shown, a first tooth tip 124 is provided at the lowermost part of the one-way rack 123. The spring piece 114 includes an abutting end 115 that mates with the one-way rack 123. When the rotating portion 111 rotates counterclockwise around the rotating shaft 110, the spring piece 114 deforms and cannot move backward after passing over the first tooth tip 124, and can only continue to rotate counterclockwise to cause the abutting portion 112 to push the ligation end 3 into the firing state. Therefore, after entering the firing state, the rotating handle 11 can only continue to move counterclockwise in the figure. At the same time, the abutting portion 112 pushes the push tube 33 towards the forceps rod assembly 31 to complete feeding and continuous firing.

[0031] The ligation end 3 includes a forceps rod assembly 31, a continuous firing push rod 32, a push tube 33, and a second spring 34. The forceps rod assembly 31 includes forceps jaws 311 for firing ligation clips. Its related structure and operation process are prior art, so they will not be described in detail. One end of the continuous firing push rod 32 is arranged inside the forceps rod assembly 31 to control firing and feeding, and the other end is fixed to the push tube 33 by a thread. The second spring 34 is telescopically clamped between the forceps rod assembly 31 and the push tube 33. A ligation clip (not shown) is arranged inside the forceps jaws 311. After the operator inserts the ligation end 3 into the abdominal cavity, it is confirmed whether the forceps jaws 311 reach the target position by means of an endoscope (not shown). If the push tube 33 reaches the target position, it is pushed towards the forceps jaws 311 by the abutting portion 112. The push tube 33 drives the forceps jaws 311 to clamp through the internal structure of the forceps rod assembly 31 to nail the ligation clip into the target position to complete ligation.

[0032] At the same time, referring to Figure 4, the insurance component 2 includes a housing 21, a pair of safety pins 22 and a first spring 23. The pair of safety pins 22 are arranged in the housing 21, the first spring 23 is clamped between the pair of safety pins 22, a clamping platform 225 is arranged on the safety pin 22, a sliding groove 212 is formed in the housing 21, and the clamping platform 225 can slide in the sliding groove 212. A safety hole 121 is formed through the fixed handle 12. Before the elastic piece 114 is buckled with the one-way rack 123, the rotating part 111 rotates to the position where the safety pin 22 is coaxial with the safety hole 121 at L. The safety pin 22 slides under the push of the first spring 23 until the clamping platform 225 is clamped with the sliding groove 212, so that the safety pin 22 extends out and is partially stopped in the safety hole 121. When the safety pin 22 is not in the coaxial state with the safety hole 121 at L, the insurance component 2 is in a free state. When the safety pin 22 is in the coaxial state with the safety hole 121 at L, the insurance component 2 is in a locked state. When the insurance component 2 is in the locked state, the rotating handle 11 can maintain this state by itself under the locking action of the insurance component 2, and the operator does not need to apply additional force to control the rotating handle 11. Revised according to the claims

[0033] In this embodiment, the safety hole 121 is arranged on the trajectory circle of the movement of the insurance component 2. Preferably, when the insurance component 2 moves to the position of the safety hole 121, the elastic piece 114 just stops before the first tooth tip 124 of the one-way rack 123.

[0034] Such as Figure 5As shown, the safety pin 22 includes a pin head 221. The pin head 221 includes a locking surface 223. When the safety component 2 enters the locked state, the locking surface 223 is stuck in the safety hole 121. The pin head 221 further includes a first end face 224 and a bottom face 203. The fixed handle 12 is formed with a first inner wall 122. Before the safety component 2 enters the locked state, the first end face 224 abuts against the first inner wall 122 and slides, causing a pair of safety pins 22 to approach each other. The safety pin 22 further includes a pin body portion 222. A sliding cavity 211 runs through the housing 21, and the pin body portion 222 is movably inserted into the sliding cavity 211. A clamping platform 225 is provided on the pin body portion 222, including a third end face 226. When the safety component 2 enters the locked state, the third end face 226 abuts against the inner end face 223. The clamping platform 225 further includes an inclined surface 227. The top of the inclined surface 227 is connected to the third end face 226. When installing the safety pin 22, the inclined surface 227 can push the ports of the sliding cavity 211 to both sides, facilitating the insertion of the pin body portion 222 into the sliding cavity 211. The pin body portion 222 further includes a second end 228, and a spring hole 229 is formed in the second end 228. A sliding groove 212 is formed in the sliding cavity 211 located inside the housing 21. The clamping platform 225 extends into the sliding groove 212 and can move within the sliding groove 212. An inner end face 213 is formed in the sliding groove 212. The housing 21 further includes symmetric fourth end faces 204. The pin head 221 protrudes from the fourth end faces 204 to prevent the fourth end faces 204 from interfering with the movement of the first inner wall and continuously affecting the rotation of the rotating portion 111. Preferably, in this embodiment, the housing 21 is cylindrical, and the sliding groove 212 is an annular groove formed on the inner wall of the sliding cavity 211. Optionally, the housing 21 can also be a prism with a square cross-section, and the sliding groove 212 can also be a long groove along the direction of the sliding cavity 211.

[0035] Before the safety component 2 of a continuous clip applicator according to an embodiment of the present invention enters the locked state, the state is as Figure 6 and Figure 7 shown. Initially, the safety component 2 is in a free state. Under the action of the second spring 34, the push tube 33 abuts against the abutting portion 112. Therefore, the elastic piece 114 has a certain distance from the one-way rack 114. As Figure 7As shown, the housing 21 is assembled within the mounting hole 116. A pair of safety pins 22 are restricted within the fixed handle 12 by the first inner wall 122. The first spring 23 located between the safety pins 22 is compressed. There is a first gap 201 between the inner end face 213 and the third end face 226, and a second gap 202 between the bottom face 203 and the fourth end face 204. At this time, the rotating part 111 can freely rotate around the rotation axis 110, simultaneously driving the entire safety component 2 to rotate in the same direction. In this embodiment, since both the safety pins 22 and the fixed handle 12 are made of smooth plastic material with a relatively small coefficient of friction, the safety pins 22 closely adhere to the first inner wall 122 and do not impede the rotation of the rotating part 111.

[0036] When using this continuous clip applicator, when the operator presses the pressing part 113 of the rotating handle 11 to rotate the rotating handle 11, before the rotating part 111 rotates to the position where the safety pin 22 is coaxial with the safety hole 121 at L, the first end face 224 abuts against the first inner wall 122 and slides on the first inner wall 122.

[0037] As Figure 8 shown, when the rotating part 111 rotates to the position where the safety pin 22 is coaxial with the safety hole 121 at L, the safety component 2 enters the locked state. A pair of safety pins 22 move outward under the elastic force of the first spring 23 until the inner end face 213 closely adheres to the third end face 226, preventing the safety pins 22 from continuing to move. At this time, the first gap 201 disappears, and the second gap 202 increases by a corresponding length. The locking surface 223 is stuck within the safety hole 121, preventing the rotating part 111 from continuing to move. At the same time, referring to Figure 1 , after the safety component 2 enters the locked state, since the rotating handle 11 is fixedly connected to the safety component 2, it can neither move clockwise nor counterclockwise. As a result, the abutting part 112 cannot continue to push the push tube 33 to move further. As Figure 2 shown, at this time, although the abutting end 115 is in contact with the one-way rack 123, it has not crossed the first tooth tip 124. At this time, the ligation end 3 has not entered the firing state, thus achieving the function of preventing accidental firing. At the same time, at this time, the jaws 311 remain in a slightly clamped state, facilitating the operator to insert the continuous clip applicator into the operation area through a trocar or other surgical platform channels. During this period, there is no need to continuously apply a gripping force to maintain this state, saving the operator's effort and enhancing the user experience.

[0038] After the operator observes through an endoscope (not shown) that the jaws 311 have reached the surgical operation area, the operator presses the two safety pins 22 inward until the first end face 224 retracts within the first inner wall 122. At this time, the safety component 2 returns to the free state as Figure 7 shown. At this time, the operator's finger replaces the function of the first inner wall 122, and the rotating handle 11 can thus rotate freely. Referring back to Figure 2, after the insurance component 2 returns to the free state, if the operator wants to perform ligation here, the pressing part 113 can be tightly held counterclockwise, so that the rotating part 111 continues to rotate until the abutting end 115 crosses the first tooth tip 124 and engages with the one-way rack 123, making the ligation end 3 enter the firing state; if the operator wants to perform ligation at other places, the pressing part 113 is released, so that the second spring 34 pushes the push tube 33 to move to the right, and then pushes the rotating handle 11 to rotate clockwise, making the jaws 311 open again, facilitating the search for other ligation positions.

[0039] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A continuous firing clip applier, comprising a rotating handle (11), a fixed handle (12) and a ligation end (3). The rotating handle (11) includes a rotating part (111), an abutting part (112) and a leaf spring (114). The rotating part (111) is rotatably connected to the fixed handle (12). The abutting part (112) and the leaf spring (114) are fixedly connected to the rotating part (111). A one-way rack (123) is provided on the fixed handle (12). When the leaf spring (114) rotates with the rotating part (111) and engages with the one-way rack (123), the abutting part (112) pushes the ligation end (3) into a firing state. It is characterized in that, The continuous firing clip applier further includes a safety assembly (2). The safety assembly (2) is received in the rotating part (111) and includes a housing (21), a pair of safety pins (22) and a first spring (23). The pair of safety pins (22) are slidably disposed in the housing (21). The first spring (23) is clamped between the pair of safety pins (22). A clamping platform (225) is provided on the safety pin (22). A sliding groove (212) is formed in the housing (21). The clamping platform (225) can slide in the sliding groove (212). A safety hole (121) is formed through the fixed handle (12). When the rotating part (111) rotates to a position where the safety pin (22) is coaxial (L) with the safety hole (121), the safety pin (22) slides outwards under the push of the first spring (23), causing the clamping platform (225) to abut against the sliding groove (212) and at the same time, a part of the safety pin (22) is locked in the safety hole (121) to prevent the leaf spring (114) from engaging with the one-way rack (123) and prevent the ligation end (3) from entering the firing state.

2. The continuous-firing clip applicator according to claim 1, wherein The safety pin (22) includes a pin head (221). When the rotating part (111) rotates to a position where the safety pin (22) is coaxial (L) with the safety hole (121), a part of the pin head (221) is stuck in the safety hole (121).

3. The sequential clip applicator according to claim 2, wherein When the safety assembly (2) is in a free state, the safety pin (22) and the safety hole (121) are in a non-coaxial (L) state, and 11 is rotatable relative to 12. When the safety assembly (2) is in a locked state, the safety pin (22) and the safety hole (121) are in a coaxial (L) state, and 11 is fixed relative to 12. When the safety assembly (2) enters the free state from the locked state and the leaf spring (114) engages with the one-way rack (123), the ligation end (3) enters the firing state.

4. The continuous clip applicator according to claim 3, wherein The pin head (221) further includes a first end face (224). The fixed handle (12) forms a first inner wall (122). When the safety assembly (2) is in a free state, the first end face (224) slides on the first inner wall (122).

5. The continuous clip applicator according to claim 4, wherein The safety pin (22) further includes a pin body portion (222). A sliding cavity (211) runs through the housing (21), and the pin body portion (222) is movably arranged in the sliding cavity (211).

6. The sequential clip applicator according to claim 5, wherein The pin body portion (222) further includes a second end portion (228). A spring hole (229) is formed in the second end portion (228), and the first spring (23) abuts in the spring hole (229).

7. The sequential clip applicator according to claim 5, wherein, The sliding groove (212) is formed in the inner surface of the sliding cavity (211). The clamping table (225) extends into the sliding groove (212) and moves in the sliding groove (212).

8. The sequential clip applicator according to claim 7, wherein An inner end face (213) is formed in the sliding groove (212). The clamping table (225) is arranged on the pin body portion (222). When the safety pin (22) is locked with the safety hole (121), the clamping table (225) abuts against the inner end face (213).

9. The sequential clip applicator according to claim 6, wherein, The rotating portion (111) further includes a mounting hole (116). The housing (21) is clamped in the mounting hole (116) and rotates together with the rotating portion (111).

10. The continuous clip applicator according to claim 9, characterized in that, The housing (21) includes a fourth end face (204). The pin head (221) protrudes from the fourth end face (204).

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