Firing mechanism and anastomat using same

Abstract

The utility model relates to a percussion mechanism and an anastomat using the percussion mechanism. The percussion mechanism comprises a percussion assembly and a reset assembly, the percussion assembly comprises a driving block, a first elastic piece and a percussion handle, the near end of the driving block is provided with a first inclined structure inclining towards the near end of a shell from top to bottom, and the first elastic piece provides driving force for driving the driving block to move towards the near end of the shell. The percussion handle drives the driving block to move in the direction close to the far end of the shell, the reset assembly comprises a locking block and a second elastic piece, the far end of the locking block is provided with a second inclined structure capable of being matched with the first inclined structure, the locking block can drive the locking block to rotate clockwise, and the second elastic piece can provide driving force for driving the locking block to rotate anticlockwise. When the locking block rotates clockwise, the far end of the locking block slides from bottom to top along the first inclined structure relative to the driving block, and when the locking block rotates anticlockwise, the far end of the locking block slides from top to bottom along the first inclined structure relative to the driving block.

Description

Technical Field

[0001] The utility model belongs to the technical field of staplers, and in particular relates to a firing mechanism and a stapler using the firing mechanism. Background Art

[0002] The stapler is a surgical instrument that replaces traditional manual suturing in surgical operations. It is easy to operate and can suturing reliably, with few side effects and surgical complications. Common intracavitary staplers contain a firing mechanism, an actuator, and a stapler. The distal end of the actuator is the jaws. The firing mechanism contains a drive block, a firing handle, and a release mechanism. The firing handle drives the drive block forward, thereby promoting the gradual clamping of the jaws. The release mechanism can retract the drive block, thereby driving the gradual opening of the jaws, thereby realizing the distal opening and closing of the stapler. The handle of the existing stapler is an injection molded part, with reinforcing ribs evenly distributed on the inside. The initial position of the drive block is generally defined by the ribs on the handle. When operating the release mechanism, the drive block will quickly retract to the initial position, and the drive block will violently collide with the ribs of the handle and produce a loud noise, which will make the doctor's experience of using the stapler worse, and may even reduce the confidence in the use of the product. At the same time, the strong impact will also cause the stability of the device to decrease. Utility Model Content

[0003] The utility model aims to provide a firing mechanism capable of reducing the sound when a stapler is released and a stapler using the firing mechanism.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A firing mechanism of a stapler, comprising:

[0006] The shell has a flexible block at the top.

[0007] A firing assembly, comprising a driving block, a first elastic member and a firing handle, wherein the driving block is movably arranged in the shell, the proximal end of the driving block has a first inclined structure which is inclined from top to bottom toward the proximal end of the shell, the first elastic member is arranged inside the distal end of the shell, abuts against the driving block and can provide a driving force to drive the driving block to move toward the proximal end of the shell, and the firing handle is rotatably arranged on the shell and can drive the driving block to move toward the distal end of the shell.

[0008] The reset assembly comprises a locking block and a second elastic member, the locking block being pivotally connected to the shell, the distal end of the locking block having a second inclined structure that can match the first inclined structure, the distal end of the locking block being relatively slidably abutted against the proximal end of the driving block, the locking block being provided with an operating portion, a portion of the operating portion being exposed to the outside of the shell, the operating portion being able to drive the locking block to rotate in a clockwise direction when subjected to an external force, the second elastic member being arranged inside the proximal end of the shell and being able to provide a driving force to drive the locking block to rotate in a counterclockwise direction, when the locking block is rotated in a clockwise direction, the distal end of the locking block slides from bottom to top along the first inclined structure relative to the proximal end of the driving block, and when the locking block is rotated counterclockwise, the distal end of the locking block slides from top to bottom along the first inclined structure relative to the proximal end of the driving block,

[0009] The firing mechanism of the stapler has a firing state and a reset state. In the firing state, the distal end of the locking block abuts against the proximal end of the driving block, and the first inclined structure matches and docks with the second inclined structure; in the reset state, the distal upper surface of the locking block abuts against the flexible block, and the distal lower surface of the locking block abuts against the proximal upper surface of the driving block.

[0010] Preferably, the first inclined structure is a multi-step step structure that gradually shrinks from bottom to top, and the portion of the locking block close to the distal end is provided with a protrusion extending downward from the lower surface, and the distal surface of the locking block to the lower surface of the protrusion constitute the second inclined structure, and in the reset state, the lower surface of the protrusion abuts against the proximal upper surface of the driving block.

[0011] Further preferably, the multi-step step structure includes a first surface extending downward from the proximal upper edge of the driving block but not reaching the lower edge of the driving block, a second surface extending outward from the lower edge of the first surface, a third surface extending downward and outward from the outer edge of the second surface but not reaching the lower edge of the driving block, a fourth surface extending outward from the lower edge of the third surface, and a fifth surface extending downward from the outer surface of the fourth surface to the proximal lower edge of the driving block.

[0012] More preferably, the second inclined structure includes a sixth surface extending downward from the upper edge of the distal end of the locking block, a seventh surface extending inward from the lower edge of the sixth surface to the protrusion and the surface of the protrusion, and the surface of the protrusion is a curved surface structure. The curved surface structure makes the relative sliding of the first inclined structure and the second inclined structure smoother.

[0013] Preferably, the locking block includes a first part extending along the distal and proximal directions of the shell, a second part extending downward from the proximal end of the first part, and a third part extending from the lower end of the second part toward the proximal direction close to the shell, the second inclined structure is arranged at the distal end of the first part, the upper end of the second part is pivotally connected to the shell, the proximal end of the third part is fixedly connected to the distal end of the second elastic member, and the proximal end of the second elastic member is fixedly connected to the shell.

[0014] Preferably, a blocking component capable of blocking the driving block in the moving direction of the driving block is provided in the housing.

[0015] Further preferably, the blocking component is a limiting rib.

[0016] Further preferably, the driving block comprises an upper half and a lower half that are integrally formed or fixedly connected, the first inclined structure is arranged at the proximal end of the upper half, the lower half is provided with a stop block, and the limiting component is located in the direction in which the stop block moves with the driving block.

[0017] Preferably, the first elastic member is a compression spring.

[0018] Preferably, the second elastic member is a tension spring.

[0019] Preferably, the flexible block is made of rubber, silicone or flexible polyethylene.

[0020] The utility model also includes a stapler, which includes the above-mentioned firing mechanism, an actuator and a nail magazine. The proximal end of the actuator is connected to the distal end of the firing mechanism, and the distal end of the actuator is a jaw. The handle is fired to push the drive block forward, and the drive block can push the jaw to be gradually clamped through the linkage component in the actuator until the drive block reaches the specified position. At this time, the firing mechanism is in a firing state and the jaw is completely closed. The operator needs to manually release the firing mechanism to open the jaw. By operating the operating part, the drive block can be withdrawn under the action of the first elastic member, driving the jaw to gradually open until the drive block retreats to the initial position. At this time, the firing mechanism is in a reset state and the jaw is completely open.

[0021] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0022] The utility model uses a driving block with a first inclined structure and a locking block with a second inclined structure, in conjunction with the design of a flexible block on the shell, to slow down the withdrawal speed of the released driving member and reduce the impact force of the driving member on the shell, thereby achieving the effect of reducing the sound generated when the instrument is released, ensuring the stability of the instrument structure, and enhancing the doctor's experience in using the stapler. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of the overall structure of the stapler of the embodiment;

[0025] Figure 2 Schematic diagram of the structure of the stapler of the embodiment (the firing mechanism is a cross-sectional view);

[0026] Figure 3 A schematic structural diagram of a driving block in a firing mechanism of a stapler in an embodiment;

[0027] Figure 4 A schematic structural diagram of a locking block in a firing mechanism of a stapler according to an embodiment;

[0028] Figure 5 Schematic diagram of the structure of the stapler of the embodiment when the firing mechanism is in a reset state (the firing mechanism is a cross-sectional view);

[0029] Figure 6 for Figure 5 A schematic diagram of the structure of the firing mechanism;

[0030] Figure 7 Schematic diagram of the structure of the stapler of the embodiment when the firing mechanism is in a firing process at a certain moment (the firing mechanism is a cross-sectional view);

[0031] Figure 8 for Figure 7 A schematic diagram of the structure of the firing mechanism;

[0032] Fig. 9 It is a structural schematic diagram of the stapler of the embodiment when the firing mechanism is in a firing state and the firing handle has not been reset (the firing mechanism is a cross-sectional view);

[0033] Fig.10 for Fig. 9 A schematic diagram of the structure of the firing mechanism;

[0034] Fig.11 It is a structural schematic diagram of the stapler of the embodiment when the firing mechanism is in a firing state and the firing handle has been reset (the firing mechanism is a cross-sectional view);

[0035] Fig.12 for Fig.11 A schematic diagram of the structure of the firing mechanism;

[0036] Fig.13 It is a structural schematic diagram of the stapler of the embodiment at a certain moment when the firing mechanism is in the resetting process (the firing mechanism is a cross-sectional view);

[0037] Fig.14 for Fig.13 A schematic diagram of the structure of the firing mechanism;

[0038] Fig.15 1 is a schematic structural diagram of the stapler of the embodiment at another moment when the firing mechanism is in the resetting process (the firing mechanism is a cross-sectional view);

[0039] Fig.16 for Fig.15 A schematic diagram of the structure of the firing mechanism;

[0040] Fig.17 Schematic diagram of the structure of the stapler of the embodiment when the firing mechanism is in a reset state (the firing mechanism is a cross-sectional view);

[0041] Fig.18 for Fig.17 A schematic diagram of the structure of the firing mechanism;

[0042] Fig.19 for Fig.17 The enlarged view of point A in the middle.

[0043] In the above drawings, 1, firing mechanism; 11, shell; 12, flexible block; 13, driving block; 131, upper part; 132, lower part; 133, first inclined structure; 1331, first surface; 1332, second surface; 1333, third surface; 1334, fourth surface; 1335, fifth surface; 134, stopper; 14, first elastic member; 15, firing handle; 16, locking block; 161, first part; 162, second part; 163, third part; 164, second inclined structure; 1641, sixth surface; 1642, seventh surface; 1643, raised surface; 165, operating part; 166, pivot; 17, second elastic member. DETAILED DESCRIPTION

[0044] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0045] In the description of the present invention, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the inside and the outside are positions defined by the distance relative to the center of the instrument or component, wherein the inside is a position close to the center of the instrument or component, and the outside is a position away from the center of the instrument or component; the directional words such as "upper" and "lower" are described based on the states in the accompanying drawings. The description of the above directional words is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0047] Unless otherwise specified, all components of the present invention can be made of materials commonly used in the art.

[0048] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0049] Example

[0050] like Figures 1 to 19 As shown, this embodiment provides a stapler, which includes a firing mechanism 1, an actuator and a stapler. The proximal end of the actuator is connected to the distal end of the firing mechanism 1, and the distal end of the actuator is a jaw, which can be opened and closed by the firing mechanism 1. The actuator and the stapler in this embodiment are conventional components in the art, and the connection and assembly of the actuator and the firing mechanism 1 are also conventional technical means in the art, which will not be repeated here.

[0051] In this embodiment, the firing mechanism 1 includes a housing 11 , a firing assembly and a reset assembly.

[0052] Specifically, a flexible block 12 is provided at the top of the shell 11 , and a limiting rib is provided on the inner side of the shell 11 .

[0053] Specifically, the firing assembly includes a driving block 13, a first elastic member 14 and a firing handle 15. The driving block 13 is movably disposed in the housing 11, the proximal end of the driving block 13 has a first inclined structure 133 that is inclined from top to bottom toward the proximal end of the housing 11, the first elastic member 14 is disposed inside the distal end of the housing 11, and is in contact with the driving block 13 and can provide a driving force that drives the driving block 13 to move toward the proximal end of the housing 11, and the firing handle 15 is rotatably disposed on the housing 11 and can drive the driving block 13 to move toward the distal end of the housing 11. The reset assembly includes a locking block 16 and a second elastic member 17. The locking block 16 is pivotally connected in the shell 11. The distal end of the locking block 16 has a second inclined structure 164 that can match the first inclined structure 133. The distal end of the locking block 16 is relatively slidably abutted against the proximal end of the driving block 13. An operating portion 165 is provided on the locking block 16. Part of the operating portion 165 is exposed outside the shell 11. When the operating portion 165 is subjected to external force, it can drive the locking block 16 to rotate in a clockwise direction. The second elastic member 17 is arranged inside the proximal end of the shell 11 and can provide a driving force to drive the locking block 16 to rotate in a counterclockwise direction. When the locking block 16 rotates in the clockwise direction, the distal end of the locking block 16 slides from bottom to top along the first inclined structure 133 relative to the proximal end of the driving block 13. When the locking block 16 rotates counterclockwise, the distal end of the locking block 16 slides from top to bottom along the first inclined structure 133 relative to the proximal end of the driving block 13.

[0054] The firing mechanism 1 in this embodiment has a firing state and a reset state. In the firing state, the distal end of the locking block 16 abuts against the proximal end of the driving block 13, and the first inclined structure 133 matches and docks with the second inclined structure 164; in the reset state, the distal upper surface of the locking block 16 abuts against the flexible block 12, and the distal lower surface of the locking block 16 abuts against the proximal upper surface of the driving block 13.

[0055] More specifically, if Figure 3 As shown, the driving block 13 includes an upper half 131 and a lower half 132 which are integrally formed. The first inclined structure 133 is provided at the proximal end of the upper half 131. The lower half 132 is provided with a stopper 134. The housing 11 is provided with a limiting rib located in the movement direction of the stopper 134. Figure 4 As shown, the locking block 16 includes a first part 161 extending along the proximal and distal directions of the shell 11, a second part 162 extending downward from the proximal end of the first part 161, and a third part 163 extending from the lower end of the second part 162 toward the proximal direction of the shell 11, a second inclined structure 164 is provided at the distal end of the first part 161, the upper end of the second part 162 is pivotally connected to the shell 11 through a pivot 166, the proximal end of the third part 163 is fixedly connected to the distal end of the second elastic member 17, and the proximal end of the second elastic member 17 is fixedly connected to the shell 11.

[0056] More specifically, the first inclined structure 133 is a multi-step structure that gradually shrinks from bottom to top. The portion of the locking block 16 near the distal end is provided with a protrusion extending downward from the lower surface. The distal surface of the locking block 16 to the lower surface of the protrusion constitutes the second inclined structure 164. In the reset state, the lower surface of the protrusion abuts against the upper surface of the proximal end of the driving block 13. Fig.19 As shown, the multi-step step structure includes a first surface 1331 extending downward from the proximal upper edge of the driving block 13 but not reaching the lower edge of the driving block 13, a second surface 1332 extending outward from the lower edge of the first surface 1331, a third surface 1333 extending downward and outward from the outer edge of the second surface 1332 but not reaching the lower edge of the driving block 13, a fourth surface 1334 extending outward from the lower edge of the third surface 1333, and a fifth surface 1335 extending downward from the outer surface of the fourth surface 1334 to the proximal lower edge of the driving block 13.

[0057] More specifically, if Fig.19 As shown, the second inclined structure 164 includes a sixth surface 1641 extending downward from the distal upper edge of the locking block 16, and a seventh surface 1642 extending inward from the lower edge of the sixth surface 1641 to the raised surface 1643, and the raised surface 1643 is a curved surface structure.

[0058] In this embodiment, the first elastic member 14 is a compression spring, the second elastic member 17 is a tension spring, and the flexible block 12 is made of rubber.

[0059] The closing (jaw closing) process of the stapler of this embodiment (the firing mechanism 1 changes from the reset state to the firing state) is as follows: Figure 5 to Figure 12 As shown:

[0060] 1.1 When the jaws are in a normally open state, the driving block 13 is in a stationary state under the action of the first elastic member 14 and the limiting rib, the distal upper surface of the locking block 16 abuts against the flexible block 12, and the distal lower surface of the locking block 16 abuts against the proximal upper surface of the driving block 13 ( Figure 5 , Figure 6 ).

[0061] 1.2 Close the firing handle 15. When the firing handle 15 rotates, the upper end pushes the driving block 13 to overcome the thrust of the first elastic member 14 and move toward the distal end of the shell 11. Continue to close the handle, and the driving block 13 continues to move toward the distal end of the shell 11. During this process, the locking block 16 rotates counterclockwise around the pivot 166 under the action of the second elastic member 17 and the flexible fast, and the distal end of the locking block 16 slides from top to bottom along the first inclined structure 133 relative to the proximal end of the driving block 13 until the first inclined structure 133 of the driving block 13 matches and docks with the second inclined structure 164 of the locking block 16. At this time, the driving block 13 is in a fixed state under the action of the first elastic member 14 and the locking block 16, and the jaws reach a closed state ( Figure 7 to Figure 10 ).

[0062] 1.3 Release the handle to complete the stapler closure ( Fig.11 , Fig.12 ).

[0063] The release (jaw opening) process of the stapler of this embodiment (the firing mechanism 1 changes from the reset state to the firing state) is as follows: Figures 11 to 17 As shown:

[0064] 2.1 Manually operate the operating part 165 to drive the locking block 16 to rotate clockwise around the pivot 166. The driving block 13 moves away from the distal end of the shell 11 under the action of the first elastic member 14. The distal end of the locking block 16 slides from bottom to top along the first inclined structure 133 relative to the proximal end of the driving block 13 until the driving block 13 contacts the limiting rib, the distal upper surface of the locking block 16 abuts against the flexible block 12, and the distal lower surface of the locking block 16 abuts against the proximal upper surface of the driving block 13, and reaches a static state again. During this process, the locking block 16 will contact the flexible block 12 and receive the rotation resistance from the flexible block 12. The locking block 16 is also always restrained by the pulling force of the second elastic member 17 to rotate. The locking block 16 cannot be fully and quickly bounced up, and then the driving block 13 cannot be quickly withdrawn. The driving block 13 and the limiting rib collide slightly, making a small but clear sound, and there is also a slight touch on the hand ( Figures 13 to 18 ).

[0065] 2.2 Release the operating part 165 to complete the stapler release ( Fig.17 , Fig.18 ).

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A firing mechanism of a stapler, characterized in that: It includes: The housing (11) has a flexible block (12) disposed on the top of the housing. A firing assembly, comprising a drive block (13), a first elastic member (14) and a firing handle (15); the drive block (13) is movably arranged in the housing (11); the proximal end of the drive block (13) has a first inclined structure (133) which is inclined from top to bottom toward the proximal end of the housing (11); the first elastic member (14) is arranged inside the distal end of the housing (11), abuts against the drive block (13) and can provide a driving force for driving the drive block (13) to move in a proximal direction close to the housing (11); the firing handle (15) is rotatably arranged on the housing (11) and can drive the drive block (13) to move in a distal direction close to the housing (11); A reset assembly, comprising a locking block (16) and a second elastic member (17), wherein the locking block (16) is pivotally connected to the housing (11), the distal end of the locking block (16) has a second inclined structure (164) that can match the first inclined structure (133), the distal end of the locking block (16) is relatively slidably abutted against the proximal end of the driving block (13), the locking block (16) is provided with an operating portion (165), a portion of the operating portion (165) is exposed outside the housing (11), and the operating portion (165) can drive the locking block (16) to move when an external force is applied. The locking block (16) rotates in a clockwise direction, the second elastic member (17) is arranged inside the proximal end of the housing (11) and can provide a driving force to drive the locking block (16) to rotate in a counterclockwise direction. When the locking block (16) rotates in a clockwise direction, the distal end of the locking block (16) slides from bottom to top along the first inclined structure (133) relative to the proximal end of the driving block (13); when the locking block (16) rotates in a counterclockwise direction, the distal end of the locking block (16) slides from top to bottom along the first inclined structure (133) relative to the proximal end of the driving block (13). The firing mechanism of the stapler has a firing state and a reset state. In the firing state, the distal end of the locking block (16) abuts against the proximal end of the driving block (13), and the first inclined structure (133) and the second inclined structure (164) are matched and docked. In the reset state, the distal upper surface of the locking block (16) abuts against the flexible block (12), and the distal lower surface of the locking block (16) abuts against the proximal upper surface of the driving block (13).

2. The firing mechanism of the stapler according to claim 1, characterized in that: The first inclined structure (133) is a multi-step structure that gradually retracts from bottom to top. The portion of the locking block (16) close to the distal end is provided with a protrusion extending downward from the lower surface. The distal surface of the locking block (16) to the lower surface of the protrusion constitute the second inclined structure (164). In the reset state, the lower surface of the protrusion abuts against the proximal upper surface of the driving block (13).

3. The firing mechanism of the stapler according to claim 2, characterized in that: The multi-step step structure comprises a first surface (1331) extending downward from the proximal upper edge of the driving block (13) but not reaching the lower edge of the driving block (13), a second surface (1332) extending outward from the lower edge of the first surface (1331), a third surface (1333) extending downward and outward from the outer edge of the second surface (1332) but not reaching the lower edge of the driving block (13), a fourth surface (1334) extending outward from the lower edge of the third surface (1333), and a fifth surface (1335) extending downward from the outer surface of the fourth surface (1334) to the proximal lower edge of the driving block (13).

4. The firing mechanism of the stapler according to claim 3, characterized in that: The second inclined structure (164) comprises a sixth surface (1641) extending downward from the distal upper edge of the locking block (16), a seventh surface (1642) extending inward from the lower edge of the sixth surface (1641) to the protrusion and a surface (1643) of the protrusion, wherein the surface (1643) of the protrusion is a curved surface structure.

5. The firing mechanism of the stapler according to claim 1, characterized in that: The locking block (16) comprises a first portion (161) extending in the distal-proximal direction of the shell (11), a second portion (162) extending downward from the proximal end of the first portion (161), and a third portion (163) extending from the lower end of the second portion (162) toward the proximal direction of the shell (11), the second inclined structure (164) being arranged at the distal end of the first portion (161), the upper end of the second portion (162) being pivotally connected to the shell (11) via a pivot (166), the proximal end of the third portion (163) being fixedly connected to the distal end of the second elastic member (17), and the proximal end of the second elastic member (17) being fixedly connected to the shell (11).

6. The firing mechanism of the stapler according to claim 1, characterized in that: A blocking component capable of blocking the driving block (13) in the moving direction of the driving block (13) is provided in the housing (11).

7. The firing mechanism of the stapler according to claim 6, characterized in that: The blocking component is a limiting rib.

8. The firing mechanism of the stapler according to claim 6, characterized in that: The driving block (13) comprises an upper half (131) and a lower half (132) which are integrally formed or fixedly connected, the first inclined structure (133) is arranged at the proximal end of the upper half (131), the lower half (132) is provided with a stopper (134), and the stopper component is located in the direction in which the stopper (134) moves along with the driving block (13).

9. The firing mechanism of the stapler according to claim 1, characterized in that: The first elastic member (14) is a compression spring, the second elastic member (17) is a tension spring, and the material of the flexible block (12) is rubber, silicone or flexible polyethylene.

10. A stapler, characterized in that: The stapler comprises a firing mechanism, an execution assembly and a staple magazine according to any one of claims 1 to 9.

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