A laparoscopic stapler for preventing mis-activation

Abstract

The present invention discloses an anti-misfire laparoscopic stapler, wherein a hanging platform with a sudden change in width is formed on a nail magazine seat; a nail pushing block is arranged on the nail magazine, and a guiding inclined surface is arranged at the proximal end of the nail pushing block, and the guiding inclined surface is closer to the proximal end than the hanging platform, so that the nail pushing block cannot return to the proximal end after being excited; a cutting knife arranged on a steering joint can move along a length direction, and the cutting knife faces the hanging platform when moving toward the distal end, and when the nail magazine is not excited, the cutting knife first contacts with the guiding inclined surface on the nail pushing block, and the cutting knife deviates along the guiding inclined surface toward a narrower width portion of a guide channel, and continues to move toward the distal end to push the nail pushing block forward to complete the excitation; when the nail magazine has completed the excitation process, since the nail pushing block cannot retreat toward the proximal end, the cutting knife contacts with the hanging platform when moving toward the distal end again, and the hanging platform blocks the movement of the cutting knife, so that the excitation cannot be completed; similarly, when there is no nail magazine in the nail magazine seat, there is no pushing knife block, and the cutting knife contacts with the hanging platform when moving toward the distal end, and the hanging platform blocks the movement of the cutting knife.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and further to a laparoscope stapler that prevents mis-activation. Background Art

[0002] Stapler is the main medical device used in medicine to replace traditional manual suturing. It has the advantages of easy use, fast suturing, tight suturing, moderate tightness, and few side effects and surgical complications. At present, laparoscopic staplers have been widely used in minimally invasive surgery for reconstruction of the stomach, colorectum, etc.

[0003] A minimally invasive surgery requires multiple suturing. To reduce costs and alleviate the burden on patients, laparoscopic staplers use a solution that allows one instrument to replace the stapler multiple times. To increase safety in use, laparoscopic staplers that allow multiple stapler replacements must be equipped with an empty stapler protection device to ensure that the device can only be activated after a new stapler is installed, and cannot be activated when no stapler is installed. Once a stapler is activated, it cannot be activated again, thereby eliminating medical accidents caused by the doctor's negligence of not installing the stapler or not replacing the fired stapler.

[0004] For those skilled in the art, how to reliably and stably prevent the stapler from being erroneously activated is a technical problem that needs to be solved at present. Summary of the invention

[0005] The present invention provides an anti-misfire laparoscope stapler, which can prevent misfire when the staple cartridge is not installed or has been fired, thereby preventing medical accidents. The specific scheme is as follows:

[0006] A laparoscopic stapler for preventing misfire, comprising a steering joint, a staple cartridge seat and a staple anvil, wherein the staple cartridge seat is mounted on the steering joint, and the staple anvil is hinged to the steering joint; and a staple cartridge can be detachably mounted on the staple cartridge seat;

[0007] A guide channel is provided on the nail magazine seat along the length direction, the width of the proximal end portion of the guide channel is greater than the width of the distal end portion, and a hanging platform with a sudden width change is formed on one side of the guide channel;

[0008] The staple cartridge is provided with a staple pusher block for stimulating the suture staples, the proximal end of the staple pusher block is provided with a guide slope, the guide slope is closer to the proximal end than the hanging platform, and the staple pusher block can only move from the proximal end to the distal end;

[0009] A cutting knife is arranged on the steering joint, and the cutting knife can move along the length direction. When the cutting knife moves toward the distal end, it faces the hanging platform. When the distal end of the cutting knife contacts the guide slope, the cutting knife is offset toward the narrower part of the guide channel, and continues to move toward the distal end to push the nail pushing block forward to complete the excitation.

[0010] Optionally, an elastic side thrust piece is provided on the steering joint, and when the cutting knife passes through the elastic side thrust piece, the elastic side thrust piece applies a lateral elastic force perpendicular to the moving direction to the cutting knife, so that the cutting knife is biased to move toward the hanging platform.

[0011] Optionally, the elastic side thrust member includes a spring and a top ball, the spring applies elastic force to the top ball, and the top ball contacts the cutting knife.

[0012] Optionally, the guide channel is a strip-shaped hole opened on the nail magazine seat;

[0013] A limiting block is protruding from the surface of the nail pushing block, and the limiting block can be inserted into the narrow section of the guide channel for guiding movement.

[0014] Optionally, the cutting knife is guided and deflected by the guiding bevel and finally hits the limiting block.

[0015] Optionally, the cutting knife comprises a knife head and a push blade, the push blade is fixed at the proximal end of the knife head; the portion of the knife head in contact with the nail pushing block is closer to the distal end than the knife edge.

[0016] The present invention provides an anti-misfire laparoscope stapler, wherein a staple cartridge seat is mounted on a steering joint, and a staple anvil is hinged to the steering joint; a proximal portion of a guide channel arranged along a length direction on the staple cartridge seat has a width greater than a distal portion of the guide channel, so as to form a hanging platform with a sudden change in width; a staple pushing block is arranged on the staple cartridge, and a guide inclined surface is arranged at the proximal end of the staple pushing block, and the guide inclined surface is closer to the proximal end than the hanging platform, and when the staple pushing block moves from the proximal end to the distal end, the suture staple is triggered, and after the triggering, the staple pushing block cannot return to the proximal end; a cutting knife arranged on the steering joint can move along the length direction, and the cutting knife moves toward the distal end When the nail magazine is not excited, the cutting knife first contacts with the guiding inclined surface on the nail pushing block, and the cutting knife deviates along the guiding inclined surface toward the narrower part of the guide channel, and continues to move toward the distal end to push the nail pushing block forward to complete the excitation; when the nail magazine has completed the excitation process, since the nail pushing block cannot retreat to the proximal end, the cutting knife contacts with the hanging platform when it moves toward the distal end again, and the hanging platform blocks the movement of the cutting knife and cannot be excited; similarly, when there is no nail magazine in the nail magazine seat, there is no pushing knife block, and the cutting knife contacts with the hanging platform when it moves toward the distal end, and the hanging platform blocks the movement of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A front view of the local structure of the distal end portion of the anti-misfire laparoscope stapler provided by the present invention;

[0019] Figure 2A It is a structural schematic diagram of a nail magazine seat;

[0020] Figure 2B It is a structural schematic diagram of a push pin block;

[0021] Figure 2C and Figure 2D They are the front view and top view of the cutting knife respectively;

[0022] Figure 3 This is a schematic diagram of the principle of the anti-misfire laparoscopic stapler of the present invention;

[0023] Figure 4A is a schematic diagram showing that the cutting knife is not in contact with the elastic side thrust member;

[0024] Figure 4B is a schematic diagram of the contact between the cutting knife and the elastic side thrust member;

[0025] Figure 4C This is a schematic diagram of the cutting knife returning to the center after passing over the guide slope.

[0026] The figure includes:

[0027] Steering joint 1, cutting knife 11, knife head 111, pushing blade 112, elastic side thrust member 12, spring 121, top bead 122, nail magazine seat 2, guide channel 21, hanging platform 22, nail anvil 3, nail magazine 4, nail pushing block 41, guiding inclined surface 42, limiting block 43. DETAILED DESCRIPTION

[0028] The core of the present invention is to provide a laparoscopic stapler that can prevent mis-activation, thereby preventing mis-activation when a staple cartridge is not installed or has been activated, thereby preventing medical accidents.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the anti-misfire laparoscopic stapler of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figure 1 As shown, it is a front view of the partial structure of the distal part of the anti-misfire laparoscope stapler provided by the present invention; during operation, the medical staff holds the stapler, and the distal end referred to in this article is the side away from the hand, and the proximal end is the side close to the hand.

[0031] The anti-misfire laparoscope stapler of the present invention comprises a steering joint 1, a stapler seat 2 and a stapler anvil 3. The steering joint 1 is used to connect with the rod body of the stapler and can rotate relative to the rod body. When the steering joint 1 rotates, the stapler seat 2 and the stapler anvil 3 are driven to rotate synchronously. The stapler seat 2 is mounted on the steering joint 1, and the stapler seat 2 is usually relatively fixedly connected to the steering joint 1. The stapler anvil 3 is hinged to the steering joint 1, and the stapler anvil 3 and the stapler seat 2 can be relatively opened and closed.

[0032] The staple cartridge 4 is detachably mounted on the staple cartridge seat 2 , and suture staples are arranged on the staple cartridge 4 . When the staple cartridge 4 is activated, the suture staples are pressed out of the suture tissue.

[0033] A guide channel 21 is provided on the staple cartridge seat 2 along the length direction, where the length direction is the direction along the line connecting the proximal end and the distal end; Figure 2A FIG. 2 is a schematic diagram of the structure of the nail magazine seat 2. The width of the proximal portion of the guide channel 21 is greater than the width of the distal portion. Figure 2A The right side in the middle is the proximal end, the width of the upper right side of the guide channel 21 is greater than the width of the lower left side, and a hanging platform 22 with a sudden change in width is formed on one side of the guide channel 21. The hanging platform 22 is located at the junction of different width positions of the guide channel 21. Due to the sudden change in width, a right-angled hanging platform 22 is formed, and the hanging platform 22 plays a key role in preventing false triggering.

[0034] The staple cartridge 4 is provided with a staple pusher block 41 for activating the suture staples. The staple pusher block 41 is a part of the staple cartridge 4 and can move toward the distal end relative to the main body of the staple cartridge 4. Figure 2B As shown, it is a schematic diagram of the structure of the nail pushing block 41, the right side is the proximal end, the left side is the distal end, and the proximal end of the nail pushing block 41 is provided with a guide slope 42. Since the hanging platform 22 only needs to be provided on one side of the guide channel 21, only one guide slope 42 is required. Figure 2B Two guiding inclined surfaces 42 are symmetrically arranged in the middle, and only one of them takes effect during operation.

[0035] Figure 2B The two guide slopes 42 are in a trumpet shape, and the guide slopes 42 are closer to the proximal end than the hanging platform 22, and the nail pushing block 41 can only move from the proximal end to the distal end;

[0036] A cutting knife 11 is provided on the steering joint 1. Figure 2C and Figure 2D As shown, they are a front view and a top view of the cutting knife 11, respectively; the cutting knife 11 can move along the length direction, and the function of the cutting knife 11 is to close the anvil 3 and the nail magazine seat 2 to each other. The cutting knife 11 can also push the nail pushing block 41 to move to complete the excitation of the nail magazine, and the cutting knife 11 can also cut the tissue when it moves toward the distal end.

[0037] When the distal end of the cutting blade 11 contacts the guide slope 42, the cutting blade 11 is deflected toward the narrower portion of the guide channel 21, and continues to move toward the distal end to push the nail pusher block 41 forward to complete the firing. Figure 3 As shown, it is a schematic diagram of the principle of the anti-misfire laparoscopic stapler of the present invention, which is equivalent to a view from the top direction; when the cutting knife 11 moves toward the distal end, it faces the hanging table 22. If there is no push pin block 41, when the cutting knife 11 contacts the hanging table 22, it cannot continue to move toward the distal end. Since the guide slope 42 is closer to the proximal end than the hanging table 22, that is, Figure 3 The middle guide slope 42 is further to the left than the hanging platform 22. When the cutting knife 11 moves to the far right, it first contacts the guide slope 42. The guide slope 42 plays a guiding role, causing the cutting knife 11 to deviate in the guide channel 21, that is, the far end of the cutting knife 11 moves to the right. Figure 3 The cutting knife 11 will not contact the hanging platform 22, and the cutting knife 11 and the nail pushing block 41 will move toward the far end together. During this process, the cutting knife 11 passes over the hanging platform 22 and extends to the narrower part of the far end of the guide channel 21, so the excitation can be completed normally.

[0038] When the nail magazine 4 completes one excitation, the nail pushing block 41 remains at the far end and cannot retreat, and the cutting knife 11 can move backward. If the cutting knife 11 is moved to the far end again without being replaced, the cutting knife 11 will contact the hanging platform 22 and be blocked by the hanging platform 22 and cannot continue to move to the far end, so the excitation process cannot be achieved.

[0039] When there is no nail magazine in the nail magazine seat 2, similarly, due to the absence of the nail pushing block 41, the cutting knife 11 will contact the hanging platform 22 when moving toward the distal end, and will be blocked by the hanging platform 22 and cannot continue to move toward the distal end, and the excitation process cannot be achieved.

[0040] With the anti-misfire laparoscopic stapler provided by the present invention, the stimulation can be completed only when the staple magazine 4 is installed in the staple magazine seat 2 and the staple magazine 4 is not in use. In other cases, normal operation cannot be performed, thereby effectively preventing misoperation and fundamentally eliminating the occurrence of such medical accidents.

[0041] On the basis of the above solution, the present invention provides a further solution, wherein an elastic side thrust member 12 is provided on the steering joint 1, and when the cutting knife 11 passes through the elastic side thrust member 12, the elastic side thrust member 12 applies a lateral elastic force perpendicular to the moving direction to the cutting knife 11, so that the cutting knife 11 is biased to move toward the hanging platform 22. Figure 4A , which is a schematic diagram showing that the cutting knife 11 is not in contact with the elastic side thrust member 12; Figure 4B It is a schematic diagram of the contact between the cutting blade 11 and the elastic side thrust member 12; Figure 4C It is a schematic diagram of the cutting knife 11 returning to the center after passing over the guiding inclined surface 42; the above three views are all views from the top direction.

[0042] In this embodiment, the cutting knife 11 is facing the narrower part of the far end of the guide channel 21 in the initial position. When the cutting knife 11 contacts the elastic side thrust piece 12, it is pushed by the elastic force and deflects to the side where the hanging platform 22 is located, and contacts the side wall of the wider side wall of the guide channel 21, thereby ensuring that the cutting knife 11 will not mistakenly enter the narrower part of the guide channel 21 due to vibration or other reasons, thereby providing further safety protection.

[0043] Specifically, the elastic side thrust member 12 of the present invention includes a spring 121 and a top ball 122 . The spring 121 applies elastic force to the top ball 122 . The top ball 122 contacts the cutting blade 11 , thereby reducing the resistance generated when contacting the cutting blade 11 .

[0044] Preferably, if Figure 2A As shown, the guide channel 21 is a strip-shaped hole opened on the nail magazine seat 2, that is, the guide channel 21 passes through the side wall of the nail magazine seat 21; Figure 2B As shown, a limit block 43 is protruding from the surface of the push nail block 41. The limit block 43 is located at the midline of the push nail block 41. The limit block 43 can be inserted into the narrow section of the guide channel 21 for guided movement. The limit block 43 cooperates with the width of the narrower part of the far end of the guide channel 21 to avoid shaking left and right.

[0045] Specifically, the cutting blade 11 in the present invention is guided and offset by the guiding slope 42 and finally presses against the limiting block 43. The thickness of the limiting block 43 is greater than the thickness of other parts of the nail pushing block 41, which can reduce the pressure when the cutting blade 11 and the nail pushing block 41 are in contact. Due to the larger contact area, the movement of the nail pushing block 41 is more stable.

[0046] like Figure 2C and Figure 2D As shown, the cutting knife 11 includes a cutter head 111 and a push blade 112. The push blade 112 is fixed to the proximal end of the cutter head 111. The cutter head 111 and the push blade 112 are both in the form of thin sheets and can be made by welding alloy materials. The portion of the cutter head 111 that contacts the nail pushing block 41 is closer to the distal end than the blade. Figure 2C A in the middle represents a blade. The blade head 111 is thicker at a position above the blade and contacts the nail pushing block 41 , and this contact area protrudes toward the distal end relative to the blade.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laparoscopic stapler for preventing mis-activation, characterized in that: It comprises a steering joint (1), a nail magazine seat (2) and a nail anvil (3), wherein the nail magazine seat (2) is mounted on the steering joint (1), and the nail anvil (3) is hinged to the steering joint (1); a nail magazine (4) is detachably mounted on the nail magazine seat (2); A guide channel (21) is provided on the nail magazine seat (2) along the length direction, the width of the proximal portion of the guide channel (21) is greater than the width of the distal portion, and a hanging platform (22) with a sudden change in width is formed on one side of the guide channel (21); The staple cartridge (4) is provided with a staple pusher block (41) for stimulating the suture staples, a guide slope (42) is provided at the proximal end of the staple pusher block (41), the guide slope (42) is closer to the proximal end than the hanging platform (22), and the staple pusher block (41) can only move from the proximal end to the distal end; A cutting knife (11) is arranged on the steering joint (1), and the cutting knife can move along the length direction. When the cutting knife (11) moves toward the distal end, it faces the hanging platform (22). When the distal end of the cutting knife (11) contacts the guide inclined surface (42), the cutting knife (11) is offset toward the narrower portion of the guide channel (21), and continues to move toward the distal end to push the nail pushing block (41) forward to complete the excitation. An elastic side thrust piece (12) is provided on the steering joint (1); when the cutting knife (11) passes through the elastic side thrust piece (12), the elastic side thrust piece (12) applies a lateral elastic force perpendicular to the moving direction to the cutting knife (11), so that the cutting knife (11) is biased to move toward the hanging platform (22).

2. The anti-misfire laparoscopic stapler according to claim 1, characterized in that: The elastic side thrust member (12) comprises a spring (121) and a top ball (122); the spring (121) applies elastic force to the top ball (122); and the top ball (122) contacts the cutting knife (11).

3. The anti-misfire laparoscopic stapler according to claim 1, characterized in that: The guide channel (21) is a strip-shaped hole formed on the nail magazine seat (2); A limiting block (43) is protruding from the surface of the pin-pushing block (41), and the limiting block (43) can be inserted into the narrow section of the guide channel (21) for guiding movement.

4. The anti-misfire laparoscopic stapler according to claim 3, characterized in that: The cutting blade (11) is guided and deflected by the guiding inclined surface (42) and finally abuts against the limiting block (43).

5. The anti-misfire laparoscopic stapler according to claim 3, characterized in that: The cutting knife (11) comprises a knife head (111) and a push blade (112), wherein the push blade (112) is fixed at the proximal end of the knife head (111); the portion of the knife head (111) in contact with the nail pushing block (41) is closer to the distal end than the knife edge.

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