Clip pushing trigger mechanism of continuous clip applier

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a clip pushing trigger mechanism of a continuous clip applier. In order to solve the problem that in the prior art, a clip applier is difficult to accurately push a clip, the utility model provides a repeating clip applier clip pushing trigger mechanism which comprises a rotatable trigger, a clip applier shell and a clip pushing mechanism, and the clip pushing mechanism is pushed to move linearly by rotating the trigger; the sliding shaft section is provided with at least two connected continuous sliding groove sections which are arranged in a trigger, wherein the sections of the sliding shaft section are sequentially increased / decreased, and the sliding shaft section can slide in different sliding groove sections; the width of the sliding groove sections is continuously increased / decreased; a sliding shaft section with a large cross section cannot be downwards compatible with a sliding groove section matched with a sliding shaft section with a small cross section, and a sliding shaft can move in the direction penetrating through the sliding groove section, so that sliding shaft sections of different specifications are in sliding connection with the sliding groove section, and the displacement state is fixed. And the effect of accurately controlling the rotating distance of the trigger every time so as to accurately control the pushing and clamping is achieved.

Description

[0001] The utility model belongs to the technical field of medical equipment, especially relates to a continuous firing of a clip applier clamping sub-propelling trigger mechanism. BACKGROUND

[0002] The continuous firing of a clip applier often needs to judge the positioning of the clip first and then lock the trigger state when pushing the clip. Since the pushing process is single-handed operation, the operation is complicated, and the clip is easy to be pushed out of position or not in position. Although some have positioning and locking devices, the positioning and locking devices are easy to be out of position or not easy to operate.

[0003] For example, the Chinese utility model patent discloses a multiple firing of a clip applier pushing positioning mechanism [application number: 202321696819.7]. The utility model provides a multiple firing of a clip applier pushing positioning mechanism, which realizes positioning and limiting through the cooperation of the limiting assembly and the limiting cooperation points, does not need to be locked and unlocked, and is suitable for single-handed operation. Meanwhile, the limiting round holes are arranged at equal intervals, so that the problems of easy pushing out of position or not in position in the actual use process are avoided.

[0004] Although the utility model realizes positioning and limiting through the cooperation of the limiting assembly and the limiting cooperation points, it has the defect that single-handed operation is not easy to unlock. SUMMARY

[0005] The utility model aims at the above problems and provides a continuous firing of a clip applier clamping sub-propelling trigger mechanism to realize accurate single-handed operation of pushing the clip.

[0006] The utility model, including rotatable trigger, clip applier shell and clamping sub-propelling mechanism, the trigger is hinged with the clip applier shell, and the clamping sub-propelling mechanism is driven to move linearly by rotating the trigger, characterized by further comprising a limiting module, at least two width-increasing / decreasing continuous sliding groove sections connected with each other are arranged in the trigger, the limiting module has sliding shaft sections corresponding to the sliding groove sections and connected with each other and sequentially increasing / decreasing in cross section, the sliding shaft section with a larger cross section cannot be downwardly compatible with the sliding groove section adapted to the smaller sliding shaft section, and the sliding shaft can be displaced along the direction penetrating the sliding groove section to realize the sliding connection and fixed displacement state of the sliding groove section and the sliding shaft section of different specifications.

[0007] Preferably, the sliding groove section is two sections, and the width increases along the direction in which the trigger drives the clamping sub-propelling mechanism to rotate, and correspondingly, the sliding shaft section is also two sections with different sizes.

[0008] Preferably, the limiting module further comprises a spring fixing cylinder, a return spring and an adjusting end, one end of the return spring is connected to the bottom of the spring fixing cylinder, and the other end is in direct or indirect contact with one side of the smaller section of the sliding shaft section; and the adjusting end is connected to the side of the larger section of the sliding shaft section away from the return spring.

[0009] Preferably, the limiting module further comprises a locking structure which limits the movement of the sliding shaft segment.

[0010] Preferably, the locking structure comprises a limiting hole formed on the spring fixing cylinder and a telescopic clamping piece, a positioning pin is arranged on the side of the trigger close to the sliding groove segment with larger width, one end of the telescopic clamping piece is connected to one side of the segment with smaller cross section of the sliding shaft segment, and the other end directly abuts against the return spring, the telescopic clamping piece can be separated from the limiting hole by the positioning pin and move with the sliding shaft segment.

[0011] Preferably, the telescopic clamping piece comprises a limiting cavity, a limiting block and a limiting return spring, one end of the limiting cavity is connected to one side of the segment with smaller cross section of the sliding shaft segment, and the other end directly abuts against the return spring and is in sliding connection with the spring fixing cylinder, the limiting return spring is connected to the side of the limiting cavity away from the limiting hole, the limiting block abuts against the limiting return spring and can be separated from the limiting hole to compress the limiting return spring and completely enter the limiting cavity under the action of the positioning pin.

[0012] Preferably, the clip pushing mechanism comprises a gear shaft sleeve and a clip sleeve body which are in sliding nesting with the clip applier shell, and the gear shaft sleeve is equidistantly provided with gear steps; a gear ring is arranged on the upper end of the trigger, the gear ring is in meshing with the gear shaft sleeve, and the trigger is rotated to drive the gear shaft sleeve to move linearly.

[0013] Preferably, the clip pushing mechanism further comprises a push clip rod, the push clip rod is connected with the gear shaft sleeve, and the gear shaft sleeve drives the push clip rod to move.

[0014] Preferably, the side of the limiting block close to the limiting hole is a spherical body, and the limiting hole is a circular hole.

[0015] Preferably, the sliding groove segment is in the shape of an arc which is in line with the rotating track of the trigger, and the sliding shaft segment is in the shape of a cylinder.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The utility model discloses a sliding groove segment with different widths is arranged on the trigger, and the sliding shaft segment with different specifications and sizes can be moved and adjusted to realize accurate sliding and blocking, and the accuracy of the movement displacement of the clip pushing mechanism driven by the rotary trigger is improved.

[0018] 2. The utility model also provides a mode that the gear ring is arranged on the trigger and is in cooperation with the gear steps on the gear shaft sleeve, accurate clamping in the subsequent push clip process is realized, and the problem that the manufacturing and use of the scheme that too many sliding shaft segments and sliding groove segments are cooperated are too complex is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole schematic view that the utility model is applied to the continuous firing clip applier.

[0020] Figure 2 For Figure 1 A-A cross-sectional view;

[0021] Figure 3 For the whole schematic diagram of the utility model applied to the continuous firing clamp is another view schematic diagram;

[0022] Figure 4 For Figure 3 B-B cross-sectional view;

[0023] Figure 5 For Figure 3 C-C cross-sectional view;

[0024] Figure 6 For Figure 1 Partial structure explosion state diagram;

[0025] Figure 7 For another use state schematic diagram of the utility model applied to the continuous firing clamp is another use state schematic diagram of the utility model applied to the continuous firing clamp;

[0026] Figure 8 For Figure 7 A-A cross-sectional view;

[0027] Figure 9 For another use state schematic diagram of the utility model applied to the continuous firing clamp is another use state schematic diagram of the utility model applied to the continuous firing clamp;

[0028] Figure 10 For Figure 9 A-A cross-sectional view;

[0029] Figure 11 For the necessary cooperation structure of the utility model and the continuous firing clamp;

[0030] Figure 12 For Figure 11 Explosion diagram;

[0031] Figure 13 For the main structure schematic diagram of the utility model except the clamp advancing mechanism is another view schematic diagram of the utility model except the clamp advancing mechanism;

[0032] Figure 14 For Figure 13 A-A cross-sectional view;

[0033] Figure 15 For Figure 13 Explosion diagram;

[0034] In the figure: trigger 1, clip applier housing 2, clip advancing mechanism 3, limiting module 4, positioning pin 5, sliding groove section 11, tooth ring 12, gear shaft sleeve 31, tooth step 311, clip sleeve body 32, clip pushing rod 33, sliding shaft section 41, spring fixing cylinder 42, return spring 43, adjusting end 44, locking structure 45, limiting hole 451, telescopic clamping piece 452, limiting cavity 4521, limiting block 4522, limiting return spring 4523. DETAILED DESCRIPTION

[0035] The utility model makes further detailed explanation in combination with the drawings and specific implementation.

[0036] The utility model discloses a continuous firing clip applier clip advancing trigger mechanism, like Figures 1-6 , comprising rotatable trigger 1, clip applier housing 2 and clip advancing mechanism 3, the trigger 1 is hinged with clip applier housing 2, and rotating trigger 1 pushes clip advancing mechanism 3 linear motion;The utility model is equipped with limiting module 4, and at least two width increasing / decreasing continuous sliding groove sections 11 connected with each other are arranged in trigger 1, the limiting module 4 has the sliding shaft section 41 that can slide in different sliding groove sections 11 corresponding in turn increasing / decreasing section, the sliding shaft section 41 of large section cannot be downward compatible with the sliding groove section 11 that the smaller sliding shaft section 41 adapts, and the sliding shaft can be displaced along the direction through sliding groove section 11 to realize the sliding connection of different specifications sliding shaft section 41 and sliding groove section 11 and fixed displacement state.

[0037] The utility model, when using, rotating trigger 1 is switched by operating displacement different grade sliding shaft section 41 in different specifications sliding groove section 11 and is gradually slid, realizes the accurate positioning of each time push clip, for example Figure 1 、 7 , 9 is shown, and it is the realization scheme example of two specifications sliding groove sections 11.

[0038] For example, as an embodiment, the maximum width sliding groove section 11 can be matched with the maximum sliding shaft section 41 first, and the maximum sliding shaft section 41 is blocked by the next section width reduced sliding groove section 11 when being pulled to the bottom, so that the first clip can be pushed out by clip advancing mechanism 3, and the sliding shaft section 41 can be adjusted to slide in the next level width sliding groove section 11 to push the clip, and so on.

[0039] Preferably, as shown in Figure 1 、 11 , 12, the sliding groove section 11 is two sections, and the width increases along the rotating direction of trigger 1 and clip advancing mechanism 3.

[0040] Preferably, as shown in Figures 12-14The limiting module 4 further comprises a spring fixing cylinder 42, a reset spring 43 and an adjusting end 44. One end of the reset spring 43 is connected to the bottom of the spring fixing cylinder 42, and the other end is in contact with one side of the section of the sliding shaft segment 41 with a smaller cross section directly or indirectly. The adjusting end 44 is connected to the side of the section of the sliding shaft segment 41 with a larger cross section away from the reset spring 43.

[0041] Preferably, as shown in Figure 2 The limiting module 4 further comprises a locking structure 45 for limiting the movement of the sliding shaft segment 41 to achieve the transformation of the sliding shaft segment 41 to match different sliding groove segments 11.

[0042] Preferably, as shown in Figures 13-15 The locking structure 45 comprises a limiting hole 451 opened on the spring fixing cylinder 42 and a telescopic clamping piece 452. The telescopic clamping piece 452 is connected to one side of the section of the sliding shaft segment 41 with a smaller cross section, and the other end is in direct contact with the reset spring 43. The telescopic clamping piece 452 can be pushed away from the limiting hole 451 by the positioning pin 5 and move with the sliding shaft segment 41.

[0043] Preferably, the telescopic clamping piece 452 comprises a limiting chamber 4521, a limiting block 4522 and a limiting reset spring 4523. One end of the limiting chamber 4521 is connected to one side of the section of the sliding shaft segment 41 with a smaller cross section, and the other end is in direct contact with the reset spring 43 and is in sliding connection with the spring fixing cylinder 42. The limiting reset spring 4523 is connected to the side of the limiting chamber 4521 away from the limiting hole 451. The limiting block 4522 is in contact with the limiting reset spring 4523 and can be separated from the limiting hole 451 to compress the limiting reset spring 4523 completely into the limiting chamber 4521 under the action of the positioning pin 5.

[0044] Preferably, as shown in Figure 5 The clip pushing mechanism 3 comprises a gear shaft sleeve 31 and a clip sleeve 32 which are in sliding nesting with the clip applier housing 2. The gear shaft sleeve 31 is evenly distributed with gear steps 311. The gear ring 12 is arranged on the upper end of the trigger 1 and is in meshing with the gear shaft sleeve 31. Rotating the trigger 1 pushes the gear shaft sleeve 31 to move linearly. Thus, each time the gear steps are engaged, it is a precise displacement, which is beneficial to realize the precise positioning of the clip pushing action and avoid the clip pushing action not in place.

[0045] Further, the clip pushing mechanism 3 further comprises a clip pushing rod 33 which is connected with the gear shaft sleeve 31. The gear shaft sleeve 31 pushes the clip pushing rod 33 to move out of the clip sleeve 32 to push out the clip.

[0046] Preferably, the side of the limiting block 4522 close to the limiting hole 451 is a sphere, and the limiting hole 451 is a round hole to reduce friction.

[0047] Similarly, the sliding groove section 11 is an arc shape that conforms to the rotation trajectory of the trigger 1, and the sliding shaft section 41 is cylindrical to reduce friction and make the sliding smoother.

[0048] The working principle of this embodiment is as follows: Figure 7 , 8 As shown, in the initial state, the locking structure 45 is concealed within the spring fixing cylinder 42, and the working portions of the sliding shaft section 41 and the sliding groove section 11 are at their maximum size. In this state, the adjusting end 44 can push and pull the sliding shaft section 41 to slide freely. During use, rotating the trigger 1 causes the sliding shaft section 41 and the sliding groove section 11 to slide relative to each other to the bottom of the maximum segment, i.e., near the edge of the next sliding groove section 11. Figures 1-4 As shown in the intermediate state, the trigger 1 is stopped by the sliding shaft section 41 during rotation. At this time, the trigger 1 drives the gear bushing 31 to push the push rod 33 out of the clamp sleeve 32, pushing out the first clamp. Then, pressing the adjustment end 44 displaces the sliding shaft section 41, compressing the return spring 43 until the limit block 4522 is pushed out of the limit chamber 4521 by the limit return spring 4523, achieving secondary positioning of the sliding shaft section 41 and enabling the sliding shaft section 41 to engage with the next sliding groove section 11. Rotating the trigger 1 then allows the gear step 311 on the gear bushing 31 to engage with the gear ring 12 on the trigger 1, advancing step by step. A fixed number of steps is just enough to push out the clamp, thus achieving precise pushing of each clamp until the sliding groove section 11 is pushed to the bottom as the trigger 1 rotates, reaching the desired state. Figures 9-10 The state shown. Upon reset, after rotating to the initial position, as indicated. Figure 7 As shown, the positioning pin 5 is used to push the limiting block 4522 back into the limiting chamber 4521. In this way, the limiting chamber 4521 and the sliding shaft section 41 can move again in the spring fixing cylinder 42, and are thus pushed back to the initial state by the reset spring 43 to complete the reset.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0050] Although this document frequently uses terms such as trigger 1, clamp housing 2, clamp pushing mechanism 3, limiting module 4, positioning pin 5, sliding groove section 11, gear ring 12, gear bushing 31, gear step 311, clamp sleeve 32, push clamp rod 33, sliding shaft section 41, spring fixing cylinder 42, return spring 43, adjusting end 44, locking structure 45, limiting hole 451, telescopic clip 452, limiting chamber 4521, limiting block 4522, and limiting return spring 4523, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A trigger mechanism for a continuously firing clamp, comprising a rotatable trigger (1), a clamp housing (2), and a clamp pushing mechanism (3), wherein the trigger (1) is hinged to the clamp housing (2), and rotating the trigger (1) drives the clamp pushing mechanism (3) to move linearly; characterized in that: It also includes a limiting module (4). The trigger (1) is provided with at least two connected sliding groove segments (11) with increasing / decreasing widths. The limiting module (4) has connected sliding shaft segments (41) with increasing / decreasing cross sections that can slide on different sliding groove segments (11). The sliding shaft segment (41) with a larger cross section is not compatible with the sliding groove segment (11) that is smaller than it. The sliding shaft can be displaced along the direction through the sliding groove segment (11) to achieve sliding connection between the sliding shaft segment (41) of different specifications and the sliding groove segment (11) and fix the displacement state.

2. The automatic firing clamp advance trigger mechanism as described in claim 1, characterized in that: The sliding groove section (11) consists of two segments, with the width increasing in the direction of rotation of the trigger (1) pushing the clamp pushing mechanism (3); correspondingly, the sliding shaft section (41) also consists of two segments of different sizes.

3. The automatic firing clamp advance trigger mechanism as described in claim 2, characterized in that: The limiting module (4) also includes a spring fixing cylinder (42), a reset spring (43) and an adjusting end (44). One end of the reset spring (43) is connected to the bottom of the spring fixing cylinder (42), and the other end is in direct or indirect contact with the side of the smaller section of the sliding shaft segment (41). The adjusting end (44) is connected to the side of the larger section of the sliding shaft segment (41) away from the reset spring (43).

4. The automatic firing clamp advance trigger mechanism as described in claim 3, characterized in that: The limiting module (4) also includes a locking structure (45) that restricts the movement of the sliding shaft segment (41).

5. The automatic firing clamp advance trigger mechanism as described in claim 4, characterized in that: The locking structure (45) includes a limiting hole (451) and a telescopic latch (452) on the spring fixing cylinder (42). A positioning pin (5) is provided on the side of the trigger (1) near the wider sliding groove section (11). One end of the telescopic latch (452) is connected to the side of the smaller section of the sliding shaft section (41), and the other end directly abuts against the return spring (43). The telescopic latch (452) can be pushed away from the limiting hole (451) by the positioning pin (5) and move with the sliding shaft section (41).

6. The automatic firing clamp advance trigger mechanism as described in claim 5, characterized in that: The telescopic clamp (452) includes a limiting chamber (4521), a limiting block (4522), and a limiting return spring (4523). One end of the limiting chamber (4521) is connected to the side of the smaller section of the sliding shaft section (41), and the other end directly abuts against the return spring (43) and is slidably connected to the spring fixing cylinder (42). The limiting return spring (4523) is connected to the side of the limiting chamber (4521) away from the limiting hole (451). The limiting block (4522) abuts against the limiting return spring (4523) and can disengage from the limiting hole (451) under the action of the positioning pin (5) to compress the limiting return spring (4523) and completely enter the limiting chamber (4521).

7. The automatic firing clamp advance trigger mechanism as described in claim 5, characterized in that: The clamp pushing mechanism (3) includes a gear bushing (31) and a clamp sleeve (32) that are slidably nested with the clamp housing (2). The gear bushing (31) has equidistantly distributed tooth steps (311). The upper end of the trigger (1) is provided with a toothed ring (12), which meshes with the gear bushing (31). Rotating the trigger (1) pushes the gear bushing (31) to move linearly.

8. The automatic firing clamp advance trigger mechanism as described in claim 7, characterized in that: The clamp pushing mechanism (3) also includes a push clamp rod (33), which is connected to a gear bushing (31), and the gear bushing (31) pushes the push clamp rod (33) to move.

9. The automatic firing clamp advance trigger mechanism as described in claim 6, characterized in that: The limiting block (4522) is a sphere on the side near the limiting hole (451), and the limiting hole (451) is a round hole.

10. The automatic firing clamp advance trigger mechanism as described in claim 2, characterized in that: The sliding groove section (11) is an arc shape that fits the rotation trajectory of the trigger (1), and the sliding shaft section (41) is cylindrical.

Images