Surgical instrument with buffer structure

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to a surgical instrument with a buffer structure. The utility model provides a surgical instrument with a buffer structure, aiming at the situation that small medical instrument products in the prior art are easy to be damaged due to overlarge stress in the operation process, and comprising a pull rod and a shell, an installation cavity is arranged in the shell, one end of the pull rod extends into the installation cavity, and the other end of the pull rod extends into the shell. A handle is arranged at the end, away from the pull rod, of the shell. The handle and the pull rod are connected through a force transmission buffering assembly used for buffering the pull force exerted by the handle on the pull rod, and the force transmission buffering assembly is movably connected into the installation cavity. The handle and the pull rod are connected through the force transmission buffering assembly used for buffering the pull force exerted by the handle on the pull rod, the pull force is limited through the force transmission buffering assembly, and the situation that an instrument is damaged due to excessive force in the using process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical equipment, especially relates to a surgical instrument with buffer structure. BACKGROUND

[0002] Clinically, some microsurgical instruments are often used, and the short action stroke and small structure lead to insufficient bearing, so the structure is easily damaged in the use process due to excessive force. Common surgical instruments such as clip appliers all have the problem that when small size products are used, excessive force on the handle causes the related components being operated to be pulled apart or broken.

[0003] For example, the utility model discloses a push rod anti-drop structure suitable for clip applier [application number: CN202023347332.7]. The utility model, including the handle of forceps and the outer sleeve connected on the handle of forceps, the outer sleeve is equipped with the push rod, the push rod one end pressure is established on the handle of forceps, the other end is connected with the chuck that is adjusted the opening degree through moving the push rod, the outer sleeve and the push rod still are equipped with direction selection assembly and limiting piece respectively, rotate the push rod to the predetermined direction and slide the push rod can make the limiting piece slide to the outside of the outer sleeve through the direction selection assembly.

[0004] Although the utility model is provided with the anti-drop assembly that can prevent the push rod from being easily automatically dropped out, prevent the accidental separation between the push rod and other structures of the clip applier during transportation or storage, but if the overall specification is small, the problem of damage due to excessive force in the use process still cannot be avoided. SUMMARY

[0005] The utility model aims at the above -mentioned problem, provides a kind of surgical instrument with buffer structure, to realize the protection instrument not to be damaged due to being operated when excessive force.

[0006] The utility model, including pull rod and shell, the shell is equipped with installation cavity, the pull rod one end extends to installation cavity, and the shell is further equipped with handle away from the pull rod. The handle is connected between the pull rod by the force transmission buffer assembly for buffering the tension of the handle applied to the pull rod, and the force transmission buffer assembly is movably connected in the installation cavity.

[0007] The surgical instrument with buffer structure as described above, the force transmission buffer assembly includes a first force transmission component connected to the handle and a second force transmission component connected to the pull rod, and the first force transmission component and the second force transmission component are connected by an elastic buffer.

[0008] The surgical instrument with buffer structure as described above, the elastic buffer is a buffer spring.

[0009] The surgical instrument with the buffering structure, the first force transmission component comprises a handle transmission assembly and a spring pressing sleeve, and the spring pressing sleeve extrudes the buffering spring to drive the pull rod to move.

[0010] The surgical instrument with the buffering structure, the second force transmission component comprises a pull rod driving seat connected to the buffering spring at one end, and the pull rod driving seat drives the pull rod to move in the installation cavity.

[0011] The surgical instrument with the buffering structure further comprises a spring force adjusting screw, and the buffering spring is fixed to the pull rod driving seat through the spring force adjusting screw.

[0012] The surgical instrument with the buffering structure, the handle transmission assembly comprises a handle transmission rod and a pull rod joint connected to one end of the handle transmission rod, the pull rod joint is connected to the spring pressing sleeve, and the movable handle drives the handle transmission rod to drive the pull rod joint to extrude the buffering spring.

[0013] The surgical instrument with the buffering structure, the tail of the pull rod is spherical, the pull rod driving seat is provided with a spherical limiting cavity, and the spherical limiting cavity limits the pull rod from slipping off.

[0014] The surgical instrument with the buffering structure, the handle comprises a fixed handle and a movable handle hinged to the fixed handle, the fixed handle is connected to the shell, and the movable handle drives the pull rod to move.

[0015] The surgical instrument with the buffering structure further comprises a rotating assembly, the shell comprises a front shell and a rear shell, and the front shell and the rear shell can be relatively rotated through the rotating assembly.

[0016] Compared with the prior art, the surgical instrument with the buffering structure has the advantages that:

[0017] 1. The handle and the pull rod are connected through the force transmission buffering assembly for buffering the pulling force applied by the handle to the pull rod, and the pulling force is limited through the force transmission buffering assembly, so that the damage of the instrument caused by excessive force during use is avoided.

[0018] 2. The force transmission buffering assembly further comprises a force adjusting mechanism, and the maximum instantaneous pulling force can be adjusted and controlled. DRAWINGS

[0019] Figure 1 It is a whole schematic view of the utility model;

[0020] Figure 2 It is a sectional schematic view of the utility model;

[0021] Figure 3 It is Figure 1Partial structural exploded view

[0022] In the figure: pull rod 1, shell 2, mounting cavity 3, handle 4, force transmission and buffering assembly 5, elastic adjustment screw 6, rotating assembly 7, front shell 21, rear shell 22, fixed handle 41, movable handle 42, first force transmission component 51, handle transmission assembly 511, handle transmission rod 5111, pull rod joint 5112, spring pressing sleeve 512, second force transmission component 52, pull rod driving seat 521, ball limiting chamber 5211, elastic buffering piece 53, buffering spring 531. DETAILED DESCRIPTION

[0023] The utility model will be made further detailed explanation in combination with the specific embodiment and the drawing.

[0024] The utility model discloses a surgical instrument with buffering structure, which comprises a pull rod and a shell. Figure 1 And 2 The shell is internally provided with a mounting cavity, and one end of the pull rod extends into the mounting cavity. The shell is further provided with a handle at an end away from the pull rod. The handle is connected with the pull rod through a force transmission and buffering assembly for buffering the pulling force applied by the handle to the pull rod. The force transmission and buffering assembly is movably connected in the mounting cavity.

[0025] The force transmission and buffering assembly comprises a first force transmission component connected at one end to the handle and a second force transmission component connected at one end to the pull rod. The first force transmission component and the second force transmission component are connected through an elastic buffering piece.

[0026] In use, the handle drives the first force transmission component. Due to the existence of the elastic buffering piece, the force fed back to the second force transmission component is limited by the elastic buffering piece, and the force transmitted to the pull rod is relatively safe, and the components connected to the pull rod are not easily damaged.

[0027] Preferably, the elastic buffering piece can be a common buffering spring.

[0028] As a preferred solution, the first force transmission component comprises a handle transmission assembly and a spring pressing sleeve. The spring pressing sleeve extrudes the above-mentioned buffering spring to drive the pull rod to move.

[0029] Further, the second force transmission component comprises a pull rod driving seat connected at one end to the buffering spring. The pull rod driving seat drives the pull rod to move in the mounting cavity.

[0030] Specifically, as shown in Figure 2 And 3As shown, the buffer spring 531 can be sleeved at the tail of the pull rod driving seat 521, is fixed at the rear end of the pull rod driving seat 521 through the elastic force adjusting screw 6, and the elastic force adjusting screw 6 can also adjust the elastic force, that is, adjust the force transmitted to the second force transmission component 52.

[0031] As preferred, the handle transmission assembly 511 comprises a handle transmission rod 5111 and a pull rod joint 5112 connected at one end of the handle transmission rod 5111, and the pull rod joint 5112 is connected with the spring pressing sleeve 512; the movable handle 4 drives the handle transmission rod 5111 to drive the pull rod joint 5112 to extrude the spring pressing sleeve 512 to press the buffer spring 531.

[0032] As preferred, the tail of the pull rod 1 is spherical, and the pull rod driving seat 521 is provided with a spherical limiting chamber 5211 for limiting the pull rod 1 from slipping off. Such combination facilitates installation and disassembly.

[0033] As preferred, the handle 4 comprises a fixed handle 41 and a movable handle 42 hingedly connected with the fixed handle 41, and the fixed handle 41 is connected with the shell 2, and the movable handle drives the pull rod 1 to move.

[0034] As preferred, the utility model further comprises a rotating assembly 7, and the shell 2 comprises a front shell 21 and a rear shell 22, and the front shell 21 and the rear shell 22 can be relatively rotated through the rotating assembly 7.

[0035] The working principle of the embodiment is that: by rotating the movable handle 42, the handle transmission rod 5111 is driven to drive the pull rod joint 5112 to make the spring pressing sleeve 512 conduct pressure to the buffer spring 531, the buffer spring 531 drives the pull rod driving seat 521 to drive the pull rod 1 to move, and the pull rod 1 drives related components to move. Due to the mechanical properties of the buffer spring 531, the pulling force transmitted to the pull rod 2 is not too large, so as to avoid damaging the related components connected and driven by the pull rod 1. The elastic force adjusting screw 6 not only plays a role of fixing the buffer spring 531 on the spherical limiting chamber 5211, but also can adjust the maximum pulling force conducted by the buffer spring 531. The setting of the rotating assembly 7 can facilitate the adjustment of the relative positions of the components connected by the handle 4 and the pull rod 1 at any time, and facilitates dynamic adjustment in the operation process.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the range defined by the appended claims.

[0037] Although the terms such as pull rod 1, shell 2, mounting cavity 3, handle 4, force transmission buffer assembly 5, elastic adjusting screw 6, rotating assembly 7, front shell 21, rear shell 22, fixed handle 41, movable handle 42, first force transmission component 51, handle transmission assembly 511, handle transmission rod 5111, pull rod joint 5112, spring pressing sleeve 512, second force transmission component 52, pull rod driving seat 521, spherical body limiting chamber 5211, elastic buffer 53, buffer spring 531 and the like are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the utility model; any kind of additional limitation resulting from the interpretation of them is contrary to the spirit of the utility model.

Claims

1. A surgical instrument with a buffering structure, comprising a pull rod (1) and a shell (2), the shell (2) has a mounting cavity (3) inside, one end of the pull rod (1) extends into the mounting cavity (3), and the shell (2) is further provided with a handle (4) away from one end of the pull rod (1), characterized in that: The handle (4) is connected with the pull rod (1) through a force transmission and buffering assembly (5) for buffering the pulling force applied by the handle (4) on the pull rod (1), and the force transmission and buffering assembly (5) is movably connected in the mounting cavity (3). ​ 2. The surgical instrument having a cushioning structure of claim 1, wherein: The force transmission and buffering assembly (5) comprises a first force transmission component (51) connected at one end to the handle (4) and a second force transmission component (52) connected at one end to the pull rod (1), and the first force transmission component (51) and the second force transmission component (52) are connected through an elastic buffering piece (53).

3. The surgical instrument having a cushioning structure of claim 2, wherein: The elastic buffering piece (53) is a buffering spring (531).

4. The surgical instrument having a cushioning structure of claim 3, wherein: The first force transmission component (51) comprises a handle transmission assembly (511) and a spring pressing sleeve (512), and the spring pressing sleeve (512) extrudes the buffering spring (531) to drive the pull rod (1) to move.

5. The surgical instrument having a cushioning structure of claim 3, wherein: The second force transmission component (52) comprises a pull rod driving seat (521) connected at one end to the buffering spring (531), and the pull rod driving seat (521) drives the pull rod (1) to move in the mounting cavity.

6. The surgical instrument having a cushioning structure of claim 5, wherein: Further comprising a spring force adjusting screw (6), and the buffering spring (531) is fixed to the pull rod driving seat (521) through the spring force adjusting screw (6).

7. The surgical instrument having a cushioning structure of claim 4, wherein: The handle transmission assembly (511) comprises a handle transmission rod (5111) and a pull rod joint (5112) connected at one end of the handle transmission rod (5111), the pull rod joint (5112) is connected to the spring pressing sleeve (512), the movable handle (42) drives the handle transmission rod (5111) to drive the pull rod joint (5112) to extrude the spring pressing sleeve (512) to extrude the buffering spring (531).

8. The surgical instrument having a cushioning structure of claim 5, wherein: The tail of the pull rod (1) is spherical, the pull rod driving seat (521) is provided with a spherical limiting chamber (5211), and the spherical limiting chamber (5211) limits the pull rod (1) from slipping off.

9. The surgical instrument having a cushioning structure of claim 1, wherein: The handle (4) comprises a fixed handle (41) and a movable handle (42) hinged to the fixed handle (41), the fixed handle (41) is connected to the shell (2), and the movable handle drives the pull rod (1) to move.

10. The surgical instrument having a cushioning structure of claim 1, wherein: Further comprising a rotating assembly (7), the shell (2) comprises a front shell (21) and a rear shell (22), and the front shell (21) and the rear shell (22) can be relatively rotated through the rotating assembly (7).

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