A variable-direction clamp and a laparoscopic stapler including the clamp

Abstract

The present invention discloses a variable direction retainer, comprising a retainer, a first fixed seat and a second fixed seat, wherein the retainer comprises a horizontal fixed rod and a push back rod and a pull tooth arranged at the upper and lower parts thereof, wherein the two ends of the horizontal fixed rod are rotatably fixed between the first and second fixed seats, and two springs symmetrically arranged on both sides of the retainer are also arranged between the first and second fixed seats, wherein the elastic ends of the two springs are in contact with the push back rod, and when the pull tooth changes direction and swings, the push back rod is acted upon by the elastic force of the springs on both sides thereof, thereby realizing the return and retaining action of the pull tooth. A laparoscopic stapler including the retainer is also disclosed, wherein the retainer is arranged above the initial retaining groove of the advancement rack, and an elastic bumping ball is arranged at the end of the advancement rack. The present invention improves the retainer so that the retainer can change with the movement direction of the advancement rack, thereby realizing the effect of reducing the firing force and reset force of the instrument. The elastic bumping ball is also added to increase the reset angle, thereby making the reset more accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a variable-direction retaining device and a laparoscope stapler comprising the retaining device. Background Art

[0002] In surgical operations, medical laparoscopic cutting staplers have become an indispensable auxiliary medical device in the process of suturing human tissue. With the development of medicine and product research and development, more and more multifunctional staple products are used in clinical practice, and their application scope has involved various fields such as gastrointestinal surgery, hepatobiliary surgery, thoracic surgery, urology, and gynecology, becoming one of the indispensable tools for doctors. The application of laparoscopic cutting staplers has many advantages such as less bleeding during surgery, shorter operation time, reduced manual operation errors, avoidance of infection, and rapid postoperative functional recovery.

[0003] Most of the existing laparoscopic staplers have a large reset force when the components are bent and used, which makes the hand feel poor and increases the physical burden on doctors. In addition, the reset angle of the components is too small when turned right, so that the tissue cannot be effectively separated from the components after tissue resection, resulting in a long operation time and increased medical risks for patients. The reason is that the retaining device structure in the existing laparoscopic stapler is as shown in the attached figure. Figure 1 and 2 As shown, the positioning device includes a positioning member 3 and a positioning spring 2. The positioning spring 2 is sleeved on the outside of the positioning member 3, and the two ends of the positioning spring 2 are fixed. The teeth at the bottom of the positioning member 3 can swing a certain angle with the movement of the advancement rack 1 under the action of the stapler advancement rack 1. At this time, the positioning spring 2 is compressed and accumulates a large reset force. In addition, since the teeth of the positioning member 3 in this structure can only tilt in one direction and cannot change the direction of the teeth, the movement direction of the advancement rack 1 changes during reset, and the tilting direction of the teeth of the positioning member 3 remains unchanged, then the reset force between the advancement rack 1 and the positioning member 3 increases, making the instrument feel bad when used, increasing the operation time, and bringing burdens to both doctors and patients.

[0004] It can be seen that the above-mentioned existing laparoscopic staplers still have inconveniences and defects in structure, method and use, and are in urgent need of further improvement. How to create a new variable-direction retainer and a laparoscopic stapler including the retainer, so that it can effectively reduce the instrument resetting force and increase the resetting angle, so that the stapler feels good to use, the component resetting is reliable and safe, and the user experience is greatly improved, has become a goal that the industry urgently needs to improve. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a retaining device, which can effectively reduce the resetting force of the instrument, improve the feel of the stapler, and overcome the shortcomings of the retaining device in the existing laparoscopic stapler.

[0006] In order to solve the above technical problems, the present invention provides a variable-direction positioning device, including a positioning member, a first fixed seat and a second fixed seat, the positioning member including a horizontal fixed rod and a push-back rod and a pulling tooth respectively arranged at the upper and lower parts of the horizontal fixed rod, the two ends of the horizontal fixed rod are rotatably fixed between the first fixed seat and the second fixed seat, and two spring sheets are also provided between the first fixed seat and the second fixed seat, which are symmetrically arranged on both sides of the positioning member, and the elastic ends of the two spring sheets are in contact with the push-back rod at the upper part of the positioning member. When the pulling tooth at the lower part of the positioning member changes direction and swings, the push-back rod at the upper part of the positioning member is acted upon by the elastic force of the spring sheets on both sides thereof, thereby realizing the return and positioning action of the pulling tooth.

[0007] As a further improvement, the horizontal fixing rod is a cylindrical structure, and a protruding shaft is provided at the corresponding positions of the first fixing seat and the second fixing seat, and the two ends of the cylindrical structure are rotatably sleeved on the protruding shaft respectively.

[0008] As a further improvement, the spring sheet is an L-shaped elastic sheet, the horizontal section of which is embedded in a slot in the first fixing seat and / or the second fixing seat, the top of its vertical section is an elastic end, and the elastic end is provided with a bending plate extending to the push back rod.

[0009] As a further improvement, the end of the bending plate is configured as a concave arc-shaped structure, and the arc-shaped structure matches the outer circumference of the push-back rod.

[0010] As a further improvement, the connection between the horizontal section and the vertical section of the L-shaped elastic sheet is configured as an arc-shaped transition structure.

[0011] As a further improvement, the end of the horizontal section of the L-shaped elastic sheet is also provided with a bending structure, and the first fixing seat and the second fixing seat are provided with a slot matching the side structure of the horizontal section.

[0012] The technical problem that the present invention also aims to solve is to provide a laparoscopic stapler that can not only effectively reduce the resetting force of the instrument, but also increase the resetting angle of the component, so that the resetting of the component is reliable and safe, and the user experience is greatly improved.

[0013] In order to solve the above technical problems, the present invention provides a laparoscopic stapler including the above-mentioned retaining device, the laparoscopic stapler includes an advancement rack, an initial retaining slot and an end point retaining slot are provided at the upper end of the advancement rack, the retaining device is arranged above the initial retaining slot, when the laparoscopic stapler is in the initial state, the shifting tooth of the retaining member falls into the initial retaining slot, as the advancement of the advancement rack, the shifting tooth swings in the advancement direction of the rack until the advancement rack reaches the end point position, the shifting tooth falls into the end point retaining slot under the action of the spring sheet, when the advancement rack is reset, the shifting tooth swings in the rack reset direction until the advancement rack reaches the initial position, the shifting tooth falls into the initial retaining slot under the action of the spring sheet.

[0014] As a further improvement, a compression elastic bead is provided between the end of the stapler handle and the pushing rack.

[0015] As a further improvement, a fixing groove for fixing the first fixing seat and the second fixing seat is provided on the inner side of the handle shell of the stapler.

[0016] As a further improvement, a plurality of terminal slots are provided at the upper end of the propulsion rack.

[0017] After adopting such a design, the present invention has at least the following advantages:

[0018] 1. The positioning device of the present invention can realize the directional swinging of the lower part of the positioning device by providing a rotatable positioning member and spring sheets arranged on both sides thereof, and maintain the downward rotation force of the spring sheets under the elastic force of the two sides to achieve the purpose of returning and positioning the positioning device. The positioning device can flexibly change direction and swing, and can also achieve the technical effect of positioning.

[0019] 2. The positioning device of the present invention is easy to install and has moderate elastic force through the arrangement of L-shaped spring pieces, thus ensuring that the rotation force of the positioning piece is moderate. The elasticity of the spring pieces is further improved through the arc-shaped transition structure.

[0020] 3. The stapler of the present invention improves the retaining device so that the retaining member of the retaining device can change with the movement direction of the propulsion rack, so that the inclination direction of the retaining member is always the same as the movement direction of the propulsion rack, thereby achieving the purpose of reducing the friction between the retaining member and the propulsion rack, thereby achieving the effect of reducing the firing force and reset force of the instrument.

[0021] 4. A compression elastic bead is added to the end of the propulsion rack so that the elastic bead is compressed when the propulsion rack is reset, thereby increasing the reset stroke of the propulsion rack and the reset angle of the component. The elastic bead can also cause the propulsion rack to further return to its original position after the reset is terminated, so that the reset is accurate, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a structural schematic diagram of a positioner and a propulsion rack in the prior art.

[0024] Figure 2 It is a structural schematic diagram of various components of the positioner and the propulsion rack in the prior art.

[0025] Figure 3 It is a schematic diagram of the structure of the positioning device of the present invention used for a laparoscopic stapler.

[0026] Figure 4 It is an enlarged view of the local structure of the positioning device of the present invention used for the laparoscopic stapler.

[0027] Figure 5 It is a schematic diagram of the relative position structure of the positioner and the propulsion rack of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the propulsion rack of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the first fixing seat, the locking member and two spring pieces in the locking device of the present invention.

[0030] Figure 8 It is a structural schematic diagram of the second fixing seat, the locking member and the two spring pieces in the locking device of the present invention.

[0031] Fig. 9 It is a structural stereogram of the assembled positioning device of the present invention.

[0032] Fig.10 It is a schematic diagram of the structural relationship between the positioning device of the present invention and the inner wall of the anastomosis device shell. DETAILED DESCRIPTION

[0033] The present invention improves the positioner of the existing laparoscopic stapler so that the swing direction of the teeth of the positioner can be changed with the moving direction of the propulsion rack, that is, a variable positioner, which effectively reduces the reset force of the instrument. In addition, by setting a compression elastic bump bead and increasing the reset angle of the propulsion rack, the component can be reset accurately, and the user experience is greatly improved. The specific embodiments are as follows.

[0034] Refer to the attached Figures 3 to 6 As shown, the laparoscopic stapler of this embodiment comprises a propulsion rack 1 and a stopper. An initial stopper 11 and an end stopper 12 are provided at the upper end of the propulsion rack 1.

[0035] For details, please refer to the attached Figures 7 to 9As shown, the positioning device in this embodiment includes a positioning member 4, a first fixed seat 5 and a second fixed seat 6. The positioning member 4 includes a horizontal fixed rod 41 and a push-back rod 42 and a shifting tooth 43 respectively arranged at the upper and lower parts of the horizontal fixed rod 41. The two ends of the horizontal fixed rod 41 are rotatably fixed between the first fixed seat 5 and the second fixed seat 6 to achieve the directional swinging of the positioning member. Two spring plates 7 are also symmetrically arranged on both sides of the positioning member 4 between the first fixed seat 5 and the second fixed seat 6. The elastic ends of the two spring plates 7 are in contact with the push-back rod 42 at the upper part of the positioning member 4. When the shifting tooth 43 at the lower part of the positioning member 4 changes direction and swings forward and backward, the push-back rod 42 at the upper part of the positioning member 4 is acted upon by the elastic force of the spring plates 7 at both sides thereof, so as to achieve the return and positioning action of the shifting tooth 43.

[0036] More specifically, in this embodiment, the horizontal fixing rod 41 is a cylindrical structure, and protruding shafts 51 and 61 are provided at corresponding positions of the first fixing seat 5 and the second fixing seat 6, and both ends of the cylindrical structure are rotatably sleeved on the protruding shafts 51 and 61 respectively.

[0037] The spring piece 7 is an L-shaped elastic piece, the horizontal section of which is embedded in the slots 52 and 62 in the first fixing seat 5 and the second fixing seat 6, and the top of the vertical section is an elastic end, which is provided with a bending plate 71 extending to the push-back rod 42. When the positioning member 4 does not swing, the end of the bending plate 71 only contacts the push-back rod 42, and there is no force. The end of the bending plate 71 is set to a concave arc structure, which matches the outer circumference of the push-back rod 42.

[0038] In addition, the connection between the horizontal section and the vertical section of the L-shaped elastic sheet is configured as an arc-shaped transition structure 72 to improve the elasticity of the elastic sheet 7. In this embodiment, the arc-shaped transition structure 72 is also provided with a middle opening to increase the swing amplitude of the locking member 4.

[0039] The horizontal section of the L-shaped elastic sheet is configured as a bending structure 73, and the first fixing seat 5 and the second fixing seat 6 are provided with slots 52 and 62 matching the side structure of the horizontal section to achieve a stable connection between the elastic sheet and the fixing seat.

[0040] In the present application, the positioning device is arranged above the initial slot 11 to maintain the initial position of the stapler. The inner side of the handle housing of the stapler is provided with a fixing slot 9 for fixing the first fixing seat 5 and the second fixing seat 6. Fig.10 As shown, the fixing groove 9 can facilitate the fixing of the fixing seat, so that the positioning device is simple to install, easy to operate, and has low improvement cost.

[0041] In this way, when the laparoscopic stapler is in the initial state, the shifting tooth 43 of the locking member 4 falls into the initial slot 11, and as the advancement rack 1 is advanced, the shifting tooth 43 swings in the rack advancement direction until the advancement rack 1 reaches the terminal position, and the shifting tooth 43 falls into the terminal slot 12 under the action of the spring sheet 7 on one side, and when the advancement rack 1 is reset, the shifting tooth 43 swings in the rack reset direction until the advancement rack 1 reaches the initial position, and the shifting tooth 43 falls into the initial slot 11 under the action of the spring sheet 7 on the other side.

[0042] A more preferred embodiment is that a compression elastic bead 8 is provided between the end of the stapler handle and the advancing rack 1. The compression elastic bead 8 is used to compress the elastic bead 8 when the advancing rack 1 is reset, thereby increasing the reset stroke of the advancing rack 1 and increasing the reset angle of the assembly. Moreover, after the advancing rack 1 is reset, the elastic force of the elastic bead 8 can cause the advancing rack 1 to return to its original position, so that the stapler can be reset accurately, with good reset repeatability, and safe and reliable.

[0043] Of course, the upper end of the propulsion rack 1 can be provided with a plurality of terminal slots 12, such as three terminal slots in the present embodiment, which facilitates the positioning device to select the terminal positions of components of different models, thereby expanding the scope of application.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, which all fall within the protection scope of the present invention.

Claims

1. A variable-direction positioning device, characterized in that: The locking member includes a first fixing seat and a second fixing seat, wherein the locking member includes a horizontal fixing rod and a push-back rod and a pulling tooth respectively arranged at the upper part and the lower part of the horizontal fixing rod, and the two ends of the horizontal fixing rod are rotatably fixed between the first fixing seat and the second fixing seat, and two spring sheets are also provided between the first fixing seat and the second fixing seat, and the elastic ends of the two spring sheets are in contact with the push-back rod at the upper part of the locking member. When the pulling tooth at the lower part of the locking member changes direction and swings, the push-back rod at the upper part of the locking member is acted upon by the elastic force of the spring sheets on both sides thereof, thereby realizing the return and locking action of the pulling tooth.

2. The positioning device according to claim 1, characterized in that: The horizontal fixing rod is a cylindrical structure, and a protruding shaft is provided at the corresponding positions of the first fixing seat and the second fixing seat, and the two ends of the cylindrical structure are rotatably sleeved on the protruding shaft respectively.

3. The positioning device according to claim 1, characterized in that: The spring sheet is an L-shaped elastic sheet, the horizontal section of which is embedded in the slot in the first fixing seat and / or the second fixing seat, and the top of its vertical section is an elastic end, which is provided with a bending plate extending to the push-back rod.

4. The positioning device according to claim 3, characterized in that: The end of the bending plate is arranged to be a concave arc-shaped structure, and the arc-shaped structure matches the outer circumference of the push-back rod.

5. The positioning device according to claim 4, characterized in that: The connection between the horizontal section and the vertical section of the L-shaped elastic sheet is arranged to form an arc-shaped transition structure.

6. The positioning device according to claim 5, characterized in that: The end of the horizontal section of the L-shaped elastic sheet is also provided with a bending structure, and the first fixing seat and the second fixing seat are provided with a slot matching the side structure of the horizontal section.

7. A laparoscopic stapler comprising the retaining device according to any one of claims 1 to 6, characterized in that: The laparoscopic stapler includes an advancement rack, an initial slot and an end slot are formed at the upper end of the advancement rack, the positioning device is arranged above the initial slot, when the laparoscopic stapler is in the initial state, the shifting tooth of the positioning device falls into the initial slot, as the advancement of the advancement rack is carried out, the shifting tooth swings in the advancement direction of the rack until the advancement rack reaches the end position, and the shifting tooth falls into the end slot under the action of the spring sheet, when the advancement rack is reset, the shifting tooth swings in the rack reset direction until the advancement rack reaches the initial position, and the shifting tooth falls into the initial slot under the action of the spring sheet.

8. The laparoscopic stapler according to claim 7, characterized in that: A compression elastic bumping ball is arranged between the end of the stapler handle and the pushing rack.

9. The laparoscopic stapler according to claim 8, characterized in that: A fixing groove for fixing the first fixing seat and the second fixing seat is arranged inside the handle shell of the stapler.

10. The laparoscopic stapler according to claim 7, characterized in that: The upper end of the propulsion rack is provided with a plurality of terminal slots.

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