Biopsy forceps with controllable direction and size

Abstract

The application provides a novel biopsy forceps with controllable direction and size, relates to the technical field of medical devices, and comprises a forceps body with a holding end and a working end, the interior of the working end far from the holding end is provided with a joint socket, a lower jaw is provided with a joint ball at one end, and the joint ball of the lower jaw is inserted into the interior of the joint socket of the working end; the lower jaw is rotationally connected with an upper jaw, and the upper jaw has a movement tendency away from the lower jaw; at least three connecting pieces are movably connected with the joint ball of the lower jaw at one end, and the other end of the connecting pieces penetrates through the working end and protrudes out of the holding end; one end of a traction piece is connected with the upper jaw, and when the traction piece moves towards the holding end, the upper jaw is driven to rotate towards the lower jaw, thereby solving the problems that the direction of the jaw of the conventional biopsy forceps is inconvenient to control during use, and the opening size of the jaw can only be adjusted through the operation of medical staff.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a biopsy forceps capable of controlling direction and size. Background Art

[0002] With the rapid development of endoscopy and other related technologies, endoscopic biopsy has become an important means and basis for diagnosing lesions within the digestive system. With the increasing prevalence of cancer, the ability to use biopsy forceps to sample living tissue under endoscopy for sectioning and pathological analysis has become increasingly important. With the widespread clinical application of this technology, the performance requirements for biopsy forceps are becoming increasingly demanding.

[0003] However, as far as the current traditional biopsy forceps are concerned, the direction of the jaws is not easy to control during use, and the opening size of the jaws can only be adjusted by medical staff. For example, when taking a small amount of samples in deep and large ulcers or in areas with very small lesions, the lower esophagus, and the gastric fundus that are prone to bleeding, it is difficult to accurately control the amount of samples taken. At the same time, if the lesion is small or the lesion is in a more complex environment, the biopsy forceps needs to be adjusted as a whole to control the forceps head to reach the specified position, which is more complicated to operate and wastes time. Summary of the Invention

[0004] The present invention provides a biopsy forceps capable of controlling direction and size, specifically comprising:

[0005] A pliers body having a gripping end and a working end, wherein a joint socket is provided in the interior of the working end away from the gripping end; a lower jaw, wherein one end of the lower jaw is provided with a joint ball, and the joint ball of the lower jaw is inserted into the joint socket of the working end; the lower jaw is rotatably connected to the upper jaw, and the upper jaw has a tendency to move away from the lower jaw; a connecting piece, wherein one end of at least three of the connecting pieces is movably connected to the joint ball of the lower jaw, and the other end of the connecting piece passes through the working end and protrudes from the gripping end; a traction piece, wherein one end of the traction piece is connected to the upper jaw, and when the traction piece moves toward the gripping end, it drives the upper jaw to rotate toward the lower jaw.

[0006] Preferably, the connecting piece is a steel wire, and a joint ball is provided at one end of the connecting piece close to the lower jaw; a joint socket is provided outside the joint ball of the lower jaw; and the joint ball of the connecting piece is inserted into the joint socket outside the joint ball of the lower jaw;

[0007] Optionally, a universal joint is provided at one end of the connecting member close to the lower jaw, and the connecting member is connected to the joint ball of the lower jaw through the universal joint.

[0008] Preferably, the gripping end is movably connected to a controller, and the controller is fixedly connected to the traction member.

[0009] Preferably, an elastic member is fixedly connected to the end face of the controller; and the controller is connected to the holding end via the elastic member.

[0010] Preferably, a spring is provided between the upper jaw and the lower jaw; the spring is a tension spring;

[0011] Optionally, a spring is provided between the upper jaw and the lower jaw; the spring is a compression spring.

[0012] Preferably, the device further comprises a limiting member, the limiting member comprising a roller with a screw hole formed therein and a limiting plate rotatably connected to the roller; the gripping end comprises a screw rod; the screw rod engages with the roller of the limiting member via a thread, so that the limiting member moves axially along the screw rod; a blocking piece is fitted on the end of the traction member close to the controller; when the limiting member contacts the blocking piece, the limiting member and the blocking piece abut against each other, thereby limiting the movement of the traction member;

[0013] Optionally, a sleeve is provided on the limiting plate of the limiting member, and the traction member passes through the sleeve;

[0014] Optionally, a scale is provided on the screw provided at the gripping end, and the scale indicates the relationship between the position of the limit member and the opening and closing angle of the jaws.

[0015] Preferably, an operating handle is further included; at least three of the connecting members are provided with a separate operating handle at one end away from the lower jaw;

[0016] Optionally, an operating handle is also included; a joint socket is opened inside the gripping end; the operating handle has a joint ball, and the joint ball of the operating handle is inserted into the joint socket of the gripping end; the operating handle is connected to at least three connecting parts at the same time through a universal joint.

[0017] Preferably, the working end is a hard tube.

[0018] Preferably, the working end is a soft tube.

[0019] Preferably, the connecting piece is made of flexible material.

[0020] Beneficial effects

[0021] In the present invention, by pulling the connecting piece protruding from the gripping end, the above-mentioned joint ball is driven to rotate and the direction of the jaws is adjusted. Through the above structure, after the biopsy forceps head enters the human body, the angle of the jaws can be conveniently adjusted at the lesion site, which facilitates the smooth arrival of the forceps head at the lesion site and also facilitates sampling of lesion tissue with tricky angles. At least three connecting pieces are used, each of which controls a portion of the joint ball of the lower jaw on average. After controlling the connecting pieces separately and in combination, the angle of the jaws can be evenly adjusted along the space where the spherical surface of the joint ball is located.

[0022] At the same time, the limiter can adjust its position at the gripping end by rotating, that is, adjust its distance from the jaws, and then control the displacement distance of the traction member through the baffle, and feedback to the jaws is to accurately control the size of the jaw opening and closing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0024] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0025] In the attached figure:

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a biopsy forceps according to an embodiment of the present invention is shown.

[0027] Figure 2 An exploded view of a biopsy forceps according to an embodiment of the present invention is shown.

[0028] Figure 3 A schematic perspective cross-sectional view of a biopsy forceps body according to an embodiment of the present invention is shown.

[0029] Figure 4 The biopsy forceps according to an embodiment of the present invention are shown. Figure 3 A local enlarged schematic diagram of point A is shown.

[0030] Figure 5 A schematic diagram of the connection between the operating handle and the lower jaw of the biopsy forceps according to an embodiment of the present invention is shown.

[0031] Figure 6 An assembly diagram of a connecting piece of biopsy forceps according to an embodiment of the present invention is shown.

[0032] Figure 7 The biopsy forceps according to an embodiment of the present invention are shown. Figure 6 A local enlarged schematic diagram of point B is shown.

[0033] Figure 8 The biopsy forceps according to an embodiment of the present invention are shown. Figure 6 A local enlarged schematic diagram of point C is shown.

[0034] Figure 9 A schematic three-dimensional structural diagram of a biopsy forceps according to another embodiment of the present invention is shown.

[0035] Figure 10 A schematic diagram of the three-dimensional structure of a biopsy forceps according to another embodiment of the present invention is shown at another angle.

[0036] List of main reference numerals

[0037] 1. Clamp body; 101. Gripping end; 1012. Controller; 1013. Elastic member; 102. Working end; 103. Screw; 104. Limiting member;

[0038] 201. Operating handle; 202. Lower jaw; 203. Connector; 204. Upper jaw; 205. Spring;

[0039] 301. Traction piece; 302. Blocking piece. DETAILED DESCRIPTION

[0040] In order to make the purpose, solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0041] Example: Please refer to Figures 1 to 10 :

[0042] The present invention provides a biopsy forceps with controllable direction and size, comprising:

[0043] The pliers body 1 has a gripping end 101 and a working end 102, and a joint socket is provided in the inner part of the working end 102 away from the gripping end 101; the lower jaw 202 has a joint ball at one end thereof, and the joint ball of the lower jaw 202 is inserted into the joint socket of the working end 102; the lower jaw 202 is rotatably connected to the upper jaw 204, and the upper jaw 204 has a movement tendency away from the lower jaw 202; the lower jaw 202 and the upper jaw 204 form a complete pliers head, and the closure at the rear of the pliers head is The joint ball can rotate in the joint socket inside the working end 102 of the pliers body 1, thereby fine-tuning the direction of the pliers head; the connecting piece 203, one end of at least three connecting pieces 203 is movably connected to the joint ball of the lower jaw 202, and the other end of the connecting piece 203 passes through the working end 102 and protrudes from the gripping end 101; the traction piece 301, one end of the traction piece 301 is connected to the upper jaw 204, and when the traction piece 301 moves toward the gripping end 101, it drives the upper jaw 204 to rotate toward the lower jaw 202.

[0044] Among them, such as Figure 5 and Figure 6 As shown, the connecting member 203 is a steel wire, and a joint ball is provided at one end of the connecting member 203 near the lower jaw 202; a joint socket is provided outside the joint ball of the lower jaw 202; the joint ball of the connecting member 203 is inserted into the joint socket outside the joint ball of the lower jaw 202; the use of the joint connection makes the connection between the connecting member 203 and the lower jaw 202 more flexible, which is more suitable for the embodiment described below where the working end 102 is a hose; in one embodiment, the working end 102 of the biopsy forceps is a hard tube. In this embodiment, the connecting member 203 can be made of a hard steel wire, which can more accurately pull the forceps head;

[0045] In another embodiment, a universal joint is provided at one end of the connecting member 203 close to the lower jaw 202, and the connecting member 203 is connected to the joint ball of the lower jaw 202 through the universal joint; by using the universal joint, the connection between the connecting member 203 and the lower jaw 202 is more stable.

[0046] Among them, such as Figure 2 and Figure 3 As shown, the gripping end 101 is movably connected to a controller 1012, and the controller 1012 is fixedly connected to the traction member 301; the controller 1012 drives the traction member 301 to pull the upper jaw 204, thereby completing the closure of the upper jaw 204 and the lower jaw 202 at the clamp head.

[0047] Among them, such as Figure 3 As shown, the end face of the controller 1012 is fixedly connected with an elastic member 1013; the controller 1012 is connected to the holding end 101 through the elastic member 1013; through the elastic member 1013, the controller 1012 has a tendency to restore its original position when it is driven by the outside world to move relative to the working end 102, so that the controller 1012 can automatically rebound, and at the same time provide a certain buffer after the upper jaw 204 and the lower jaw 202 are closed to avoid excessive bite force between the upper jaw 204 and the lower jaw 202, resulting in cracks at the jaws.

[0048] Among them, such as Figure 8 As shown, a spring 205 is provided between the upper jaw 204 and the lower jaw 202; the spring 205 is a tension spring. In one embodiment, when the controller 1012 pulls the traction member 301, the baffle 302 moves away from the limiter 104. The spring 205 causes the upper jaw 204 and the lower jaw 202 to be in an open state in the initial state. At the same time, the baffle 302 is limited by the limiter 104 to limit the maximum angle of the upper jaw 204 and the lower jaw 202 when they are open. In this way, the amount of sample taken by the biopsy forceps can be controlled by the limiter 104, thereby preventing excessive sampling from causing damage to normal tissue.

[0049] In another embodiment, a spring 205 is provided between the upper jaw 204 and the lower jaw 202; the spring 205 is a compression spring; in one embodiment, when the controller 1012 pulls the traction member 301, the baffle 302 approaches the limit member 104, and the upper jaw 204 and the lower jaw 202 are initially in a closed state through the spring 205, and the upper jaw 204 is pulled by the traction member 301 to open the jaws, and the limit member 104 limits the maximum opening angle of the jaws.

[0050] Among them, such as Figure 3 and Figure 4As shown, the apparatus further includes a limiting member 104; the limiting member 104 comprises a roller with a screw hole formed therein and a limiting plate rotatably connected to the roller; a screw rod 103 is provided inside the gripping end 101; the screw rod 103 engages with the roller of the limiting member 104 via a thread, causing the limiting member 104 to move axially along the screw rod 103; a blocking piece 302 is provided on the end of the traction member 301 that is closest to the controller 1012; when the limiting member 104 contacts the blocking piece 302, the limiting member 104 and the blocking piece 302 abut against each other, thereby limiting the movement of the traction member 301;

[0051] In one embodiment, Figure 4 As shown, a sleeve is provided on the limiting plate of the limiting member 104, and the pulling member 301 passes through the sleeve; the sleeve limits the radial range of motion of the pulling member 301, ensuring that the blocking piece 302 can be stably abutted by the limiting member 104;

[0052] In one embodiment, a scale is provided on the screw rod 103 of the gripping end 101, and the scale indicates the relationship between the position of the limit member 104 and the opening and closing angle of the jaws.

[0053] In one embodiment, Figure 9 and Figure 10 As shown, it also includes an operating handle 201; at least three connecting members 203 are respectively provided with a separate operating handle 201 at one end away from the lower jaw 202; by controlling different connecting members 203 through the operating handle 201, the angles of the upper jaw 204 and the lower jaw 202 can be flexibly adjusted;

[0054] In one embodiment, Figure 7 As shown, it also includes an operating handle 201; a joint socket is opened inside the gripping end 101; the operating handle 201 has a joint ball, and the joint ball of the operating handle 201 is inserted into the joint socket of the gripping end 101; the operating handle 201 is connected to at least three connecting parts 203 at the same time through a universal joint; the operating handle 201 pulls the connecting part 203 to move, and drives the lower jaw 202 to rotate, thereby realizing angle adjustment. One operating handle 201 controls at least three connecting parts 203 at the same time, which can make the change of the pliers head angle more accurate. At the same time, the operating handle 201 can also display the real-time angle of the pliers head.

[0055] In one embodiment, Figure 1 As shown, the working end 102 is a hard tube. In this embodiment, the hard working end 102 can stably and accurately reach the sampling position, and is suitable for sampling shallow tissue or simple environments.

[0056] In one embodiment, Figure 9As shown, the working end 102 is a soft tube. In this embodiment, the soft working end 102 has a long extension distance and can be bent in the body, which is suitable for sampling deep tissues or complex environments. The connecting piece 203 is made of a flexible material.

[0057] Specific usage and function of this embodiment: In the present invention, the external traction on the connecting piece 203 protruding from the gripping end 101 drives the rotation of the above-mentioned joint ball and adjusts the direction of the jaws. Through the above structure, after the forceps head of the biopsy forceps enters the human body, the angle of the jaws can be conveniently adjusted at the lesion, which facilitates the smooth arrival of the forceps head at the lesion site and also facilitates sampling of lesion tissue with tricky angles. At least three connecting pieces 203 are used, each connecting piece 203 controls a part of the joint ball of the lower jaw 202 on average. After controlling the connecting piece 203 separately and combining the controlling connecting piece 203, the jaws can be evenly adjusted in angle along the space where the spherical surface of the joint ball is located. At the same time, the limiting piece 104 can adjust its position at the gripping end 101 by rotating, that is, adjust its distance from the jaws, and then control the displacement distance of the traction piece 301 through the baffle 302, which is fed back to the jaws to accurately control the size of the jaw opening and closing angle.

[0058] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

Claims

1. A biopsy forceps with controllable direction and size, characterized in that: include: A pliers body (1) having a gripping end (101) and a working end (102), wherein a joint socket is formed in an interior of the working end (102) at an end away from the gripping end (101); A lower jaw (202), one end of which is provided with a joint ball, and the joint ball of the lower jaw (202) is inserted into the joint socket of the working end (102); the lower jaw (202) is rotatably connected to the upper jaw (204), and the upper jaw (204) has a tendency to move away from the lower jaw (202); Connecting members (203), one end of at least three of the connecting members (203) being movably connected to the joint ball of the lower jaw (202), and the other end of the connecting member (203) passing through the working end (102) and protruding from the gripping end (101); A traction member (301), one end of the traction member (301) is connected to the upper jaw (204), and when the traction member (301) moves toward the gripping end (101), it drives the upper jaw (204) to rotate toward the lower jaw (202); The gripping end (101) is movably connected to a controller (1012), and the controller (1012) is fixedly connected to the traction member (301); A limiting member (104), the limiting member (104) is composed of a roller with a screw hole provided therein and a limiting plate rotatably connected to the roller; a screw rod (103) is provided inside the holding end (101); the screw rod (103) cooperates with the roller of the limiting member (104) through a thread, so that the limiting member (104) moves axially along the screw rod (103); a baffle (302) is provided on one end of the traction member (301) close to the controller (1012); when the limiting member (104) contacts the baffle (302), the limiting member (104) and the baffle (302) abut against each other, thereby limiting the movement of the traction member (301); An operating handle (201), wherein at least three of the connecting members (203) are provided with a separate operating handle (201) at one end away from the lower jaw (202); or An operating handle (201) is provided with a joint socket inside the gripping end (101); the operating handle (201) has a joint ball, and the joint ball of the operating handle (201) is inserted into the joint socket of the gripping end (101); the operating handle (201) is connected to at least three connecting members (203) simultaneously through a universal joint.

2. A biopsy forceps with controllable direction and size according to claim 1, characterized in that: The connecting piece (203) is a steel wire, and a joint ball is provided at one end of the connecting piece (203) close to the lower jaw (202); a joint socket is provided on the outside of the joint ball of the lower jaw (202); and the joint ball of the connecting piece (203) is inserted into the joint socket on the outside of the joint ball of the lower jaw (202).

3. The biopsy forceps with controllable direction and size according to claim 1, characterized in that: A universal joint is provided at one end of the connecting piece (203) close to the lower jaw (202), and the connecting piece (203) is connected to the joint ball of the lower jaw (202) via the universal joint.

4. The biopsy forceps with controllable direction and size according to claim 1, characterized in that: An elastic member (1013) is fixedly connected to the end surface of the controller (1012); the controller (1012) is connected to the gripping end (101) via the elastic member (1013).

5. The biopsy forceps with controllable direction and size according to claim 1, characterized in that: A spring (205) is provided between the upper jaw (204) and the lower jaw (202); the spring (205) is a tension spring.

6. The biopsy forceps with controllable direction and size according to claim 1, characterized in that: A spring (205) is provided between the upper jaw (204) and the lower jaw (202); the spring (205) is a compression spring.

7. The biopsy forceps with controllable direction and size according to claim 1, characterized in that: The gripping end (101) is provided with a scale at the screw rod (103), and the scale indicates the relationship between the position of the limiter (104) and the opening and closing angle of the jaws.

8. A biopsy forceps with controllable direction and size according to any one of claims 1 to 7, characterized in that: The working end (102) is a hard tube.

9. A biopsy forceps with controllable direction and size according to any one of claims 1 to 7, characterized in that: The working end (102) is a soft tube.

10. The biopsy forceps with controllable direction and size according to claim 9, characterized in that: The connecting piece (203) is made of a flexible material.

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