Anti-secondary firing resetting device for disposable laparoscopic cutting stapler

Abstract

The present invention discloses an anti-secondary firing reset device for a disposable laparoscopic cutting stapler, comprising: a hose member, an outer sleeve sleeved on the outer side of the hose member, a base block and an anti-secondary firing safety block installed on the base block through a positioning pin are arranged in the hose member, the base block moves back and forth along the axial direction of the hose member under the push of a center rod, a hose convex rib is arranged on the outer side of the anti-secondary firing safety block, a limited step is arranged on the outer side of the hose convex rib, an elastic device is arranged between the anti-secondary firing safety block and the base block, the elastic device applies outward pressure to the anti-secondary firing safety block so that the anti-secondary firing safety block abuts against the hose convex rib, and after firing, the anti-secondary firing safety block abuts against the limited step; a first reset through hole and a second reset hole groove are arranged at intervals on the outer sleeve and the hose member, and the end of the second reset hole groove extends to the front end surface of the hose convex rib. The present invention can reset the anti-secondary firing safety block, which is more convenient during production and debugging.

Description

Technical Field

[0001] The present invention relates to the technical field of disposable laparoscopic staplers, and in particular to a resetting device for preventing secondary firing of a disposable laparoscopic cutting stapler. Background Art

[0002] The cutting stapler is one of the staplers widely used in minimally invasive surgery. It is mainly used for tissue resection, transection and anastomosis in open surgery in abdominal surgery, gynecology, pediatrics and thoracic surgery. Since the existing stapler equipment cannot be used again for experiments after being fired once in production experiments, multiple experiments will result in a waste of staplers and increase production costs. In order to meet the debugging production needs, a reset device needs to be designed so that the stapler can be repeatedly fired for experimental use during production debugging. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a simple and effective anti-secondary firing resetting device for a disposable laparoscopic cutting stapler, so that the stapler can be debugged and used multiple times, reducing production costs and ensuring product quality.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: an anti-secondary firing reset device for a disposable laparoscopic cutting stapler, comprising: a hose member connected to a receiving platform, a jacket sleeved on the outside of the hose member, a base block and an anti-secondary firing safety block installed on the base block through a positioning pin are arranged in the hose member, the base block moves back and forth along the axial direction of the hose member under the push of a center rod in the receiving platform, a hose convex rib is arranged on the outside of the hose convex rib, and a limited A limiting step is formed, and an elastic device is arranged between the anti-secondary firing safety block and the base block, and the elastic device applies outward pressure to the anti-secondary firing safety block to force the anti-secondary firing safety block to abut against the hose convex rib. After the firing is completed, the anti-secondary firing safety block abuts against the limiting step under the action of the elastic device; a first reset through hole is provided on the outer sleeve and the hose component at the limiting step, and a second reset hole groove is also provided on the outer sleeve and the hose component, and the end of the second reset hole groove extends to the front end face of the hose convex rib.

[0005] In a preferred embodiment of the present invention, the elastic device is a torsion spring wound around the positioning pin, one end of which is against the base block and the other end is inserted into the positioning groove of the anti-secondary firing safety block.

[0006] In a preferred embodiment of the present invention, a guide step is provided at the front end of the limit step, and a reset rod passes through the first reset through hole to push the anti-secondary firing safety block out of the limit step to the inner side of the guide step.

[0007] In a preferred embodiment of the present invention, when the anti-secondary firing safety moves forward along the inner side edge of the guide step to the front end of the hose rib, the inclined block fixture is inserted into the second reset hole groove to guide the anti-secondary firing safety block back to the inner side of the hose rib.

[0008] In a preferred embodiment of the present invention, a groove is provided in the hose member along the central axis direction of the hose member, and a protrusion that slidably cooperates with the groove is provided on the base block.

[0009] In a preferred embodiment of the present invention, the hose piece is formed by splicing two semicircular hoses.

[0010] The beneficial effects of the present invention are: simple structure, easy to use, and a reset rod is utilized to pass through the first reset through hole to push the anti-secondary firing safety block to overcome the outward force of the torsion spring, and the anti-secondary firing safety block is squeezed out of the limiting step and pushed to the inner side of the guide step. The inclined block fixture inserted into the second reset hole groove limits the retraction distance of the basic block, so that the anti-secondary firing safety block returns to the position against the convex rib of the hose, and the basic block is retracted to the initial position before firing under the action of the center rod, thereby achieving the purpose of performing repeated firing experiments on the anastomosis device during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0012] Figure 1 is a schematic diagram of the anti-secondary firing resetting device for a disposable laparoscopic cutting stapler of the present invention in an initial state;

[0013] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0014] Figure 3 It is a schematic diagram of the movement of the anti-secondary firing reset device for the disposable laparoscopic cutting stapler of the present invention after the reset rod is inserted;

[0015] Figure 4 It is a schematic diagram of the anti-secondary firing resetting device for a disposable laparoscopic cutting stapler of the present invention when it is inserted into an oblique block fixture;

[0016] Figure 5 It is a structural schematic diagram of the anti-secondary firing resetting device for a disposable laparoscopic cutting stapler of the present invention;

[0017] Figure 6It is an assembly cross-sectional view of a basic block and a rubber hose member in a resetting device for preventing secondary firing of a disposable laparoscope cutting stapler of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0019] See also Figure 1 , Figure 2 , Figure 5 The present invention is a device for preventing secondary firing and resetting a disposable laparoscopic cutting stapler, comprising: a hose member 1 connected to a receiving platform 12, and a jacket 13 sleeved on the outside of the hose member. Preferably, the hose member 1 is formed by splicing two semicircular hoses, and a basic block 2 and a safety block 4 for preventing secondary firing installed on the basic block through a positioning pin 3 are arranged in the hose member 1. The basic block 2 is fixedly connected to a center rod (not shown in the figure) in the receiving platform, and can move back and forth along the axial direction of the hose member 1 under the push of the center rod. The safety block 4 for preventing secondary firing is provided in the hose member 1. A hose rib 5 is provided on the outer side of the safety block 4, and a limiting step 6 is provided on the outer side of the hose rib 5. An elastic device is provided between the anti-secondary firing safety block 4 and the base block 2. In the initial state, the elastic device applies outward pressure to the anti-secondary firing safety block 4 to force the anti-secondary firing safety block to abut against the hose rib 5. The anti-secondary firing safety block 4 moves forward under the push of the center rod until it is separated from the hose rib 5 to complete the firing. After the firing is completed, the anti-secondary firing safety block 4 abuts against the limiting step 6 under the action of the elastic device.

[0020] Specifically, the elastic device is a torsion spring 7 wound around the positioning pin, one end of which is against the base block 2, and the other end is passed through the positioning groove 41 of the anti-secondary firing safety block 4. Under the action of the torsion spring 7, the anti-secondary firing safety block 4 is always against the inner side surface of the hose rib 5 when it is not fired.

[0021] Specifically, Figure 3 , Figure 4 , Figure 5As shown, a first reset through hole 14 is provided on the outer sleeve 13 and the hose member 1 at the outer side of the limit step 6, and a second reset hole groove 8 is provided on the outer sleeve 13 and the hose member 1 in front of the first reset through hole 14, and the end of the second reset hole groove 8 extends to the front end surface of the hose convex rib 5. During the production process, when it is necessary to reset the anti-secondary firing safety block 4 to complete the next firing debugging experiment, first, the staff will drive the reset rod 9 into the first reset through hole to push the anti-secondary firing safety block 4 out of the limit step 6 to the inner side of the guide step 10, and the basic block is as shown in FIG. Figure 3 When the rubber hose rib 5 is moved forward in the direction indicated by the arrow, Figure 4 As shown, the inclined block fixture is inserted into the second reset hole 8 to limit the retraction distance of the base block 2, so that the anti-secondary firing safety block 4 slides closely against the inclined block fixture under the action of the torsion spring and is guided to the inner side of the hose rib 5. The base block 2 moves backward under the drive of the center rod to recover to Figure 1 The initial position in the production experiment is thus enabled to fire the stapler again.

[0022] Specifically, the hose rib 5 is arranged relatively parallel to the central axis of the hose member 1. Figure 6 As shown, a horizontal groove 11 is provided in the hose member 1 along the central axis direction of the hose member, and a protrusion 21 slidably matched with the groove is provided on the base block 2. The base block 2 can move back and forth along the horizontal groove 11 in the hose member 1 through the protrusion 21.

[0023] The beneficial effects of the anti-secondary firing resetting device for a disposable laparoscopic cutting stapler of the present invention are:

[0024] (1) The reset rod is passed through the first reset through hole to push the anti-secondary firing safety block to overcome the outward force of the torsion spring, and the anti-secondary firing safety block is squeezed out of the limit step and pushed to the inner side of the guide step. The inclined block fixture inserted into the second reset hole groove limits the retraction distance of the base block, so that the anti-secondary firing safety block is restored to the position against the convex rib of the hose. Under the action of the center rod, the base block is retracted to the initial position before firing, thereby achieving the purpose of repeating the firing test of the stapler during production and saving production costs;

[0025] (2) The structure is simple and easy to manufacture. When the existing equipment is difficult to operate during the experiment, this device makes production debugging easier.

[0026] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for preventing secondary firing and resetting for a disposable laparoscopic cutting stapler, comprising: A hose fitting connected to the receiving platform and a sleeve sleeved on the outside of the hose fitting, characterized in that a base block and an anti-secondary firing safety block installed on the base block through a locating pin are arranged in the hose fitting, the base block moves back and forth along the axial direction of the hose fitting under the push of the center rod in the receiving platform, a hose convex rib is arranged on the outside of the anti-secondary firing safety block, a limiting step is arranged on the outside of the hose convex rib, an elastic device is arranged between the anti-secondary firing safety block and the base block, the elastic device applies outward pressure to the anti-secondary firing safety block to force the anti-secondary firing safety block to abut against the hose convex rib, and after firing is completed, the anti-secondary firing safety block abuts against the limiting step under the action of the elastic device; A first reset through hole is provided on the sleeve and the hose component at the limit step, and a second reset hole groove is also provided on the outer sleeve and the hose component, the end of the second reset hole groove extends to the front end surface of the hose convex rib, the elastic device is a torsion spring wound around the positioning pin, one end of which is against the base block, and the other end is passed through the positioning groove of the anti-secondary firing safety block, and a guide step is provided at the front end of the limit step, and the reset rod passes through the first reset through hole to push the anti-secondary firing safety block out of the limit step to the inner side edge of the guide step, and when the anti-secondary firing safety moves forward along the inner side edge of the guide step to the front end of the hose convex rib, the inclined block fixture is inserted into the second reset hole groove to guide the anti-secondary firing safety block back to the inner side of the hose convex rib.

2. The device for preventing secondary firing and resetting for a disposable laparoscopic cutting stapler according to claim 1, characterized in that: A groove is arranged in the rubber hose piece along the central axis direction of the rubber hose piece, and a convex block which is slidably matched with the groove is arranged on the base block.

3. The anti-secondary firing resetting device for a disposable laparoscopic cutting stapler according to any one of claims 1 to 2, characterized in that: The rubber hose piece is formed by splicing two semicircular rubber hoses.

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