Forceps head assembly and biopsy forceps

Abstract

The forceps head assembly comprises an outer sleeve, a pull wire and a forceps head, the forceps head is of an integrated U-shaped structure, the forceps head comprises two elastic arms which are opened outwards, forceps grooves are formed in the end portions of the elastic arms, and after the two forceps grooves are closed, a containing cavity for containing biopsy tissue is formed; the outer sleeve is in a hollow tube shape, the forceps head is telescopically arranged in the outer sleeve, and the pull wire penetrates through the outer sleeve and then is connected with the rear end of the forceps head. The utility model provides the integrally formed U-shaped tong head, the structure is simple, the use is convenient, the opening and clamping of the jaw can be realized by utilizing the pull wire to drive the tong head to stretch out and draw back, the length of the tong head assembly is greatly shortened, the tong head assembly is easier to stretch out under the limit bending angle of the endoscope, the positioning deviation caused by the overlong tong head can be avoided, and the working efficiency is improved. And the operation reliability and accuracy are improved. And moreover, the opening and clamping of the jaw are controlled by directly pulling the wire, so that the response is faster, the forceps head can be quickly extended and retracted, the adjustment time is shortened, and the operation time is shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a forceps assembly and biopsy forceps. Background Technology

[0002] Biopsy forceps are an indispensable tool for obtaining pathological specimens during endoscopic examinations. Under endoscopic guidance, biopsy forceps are used to sample living tissue, perform sectioning and pathological analysis, which facilitates diagnosis and the smooth progress of surgery. With the widespread clinical application of this technique, the performance requirements for biopsy forceps are becoming increasingly stringent.

[0003] Currently, conventional biopsy forceps are mainly based on four-bar and five-bar structures. However, due to the use of multiple connecting rods that are hinged together, the forceps head assembly of the biopsy forceps is too long. Under the extreme bending angle of the endoscope, it is difficult to extend the forceps head to grasp the tissue, which prolongs the operation time, affects the accuracy of the operation, and causes pain to the patient. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a forceps head assembly and biopsy forceps to solve the problem that the forceps head assembly of the prior art has a complex structure and is too long, making it difficult to extend and grasp tissue.

[0005] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0006] In a first aspect, this utility model provides a forceps head assembly, including an outer tube, a pull wire, and a forceps head. The forceps head has an integral "U"-shaped structure. The forceps head includes two outwardly opening elastic arms. The ends of the elastic arms are provided with forceps grooves. When the two forceps grooves are closed, they form a receiving cavity for accommodating biopsy tissue. The outer tube is hollow and tubular. The forceps head is telescopically disposed inside the outer tube. The pull wire passes through the outer tube and is connected to the rear end of the forceps head.

[0007] In one embodiment of this utility model, the elastic arm is S-shaped; the outer edge of the clamp groove has a blade.

[0008] In one embodiment of the present invention, an extension sleeve is connected to the rear end of the outer sleeve, the extension sleeve being hollow tubular, and the pull wire passing through the extension sleeve.

[0009] In one embodiment of this utility model, both the extension sleeve and the pull wire are made of flexible material.

[0010] In one embodiment of the present invention, the rear end of the outer sleeve has a constricted portion with an inner diameter smaller than that of the front end, and the front end of the extension sleeve is fitted onto the outer periphery of the constricted portion.

[0011] Secondly, this utility model provides a biopsy forceps, including the forceps head assembly described above.

[0012] In one embodiment of the present invention, the biopsy forceps further includes a handle and a sliding sleeve. The sliding sleeve is slidably fitted onto the handle. The extension sleeve is fixedly connected to the handle. The rear end of the pull wire is fixedly connected to the sliding sleeve. The extension and retraction of the pull wire are achieved by the displacement of the sliding sleeve relative to the handle.

[0013] In one embodiment of the present invention, the front end of the sliding sleeve is provided with a guide sleeve, the guide sleeve is provided with a sliding cavity for the handle to slide, and the front end of the guide sleeve has a limiting hole with a diameter that matches the extension sleeve.

[0014] In one embodiment of the present invention, a groove is provided on the handle along its length, and an insert block is connected to the sliding sleeve. The insert block passes through the groove and is connected to the pull wire.

[0015] In one embodiment of the present invention, a hand ring is connected to the rear end of the handle, and an annular groove suitable for finger gripping is provided in the middle of the sliding sleeve.

[0016] As described above, the forceps assembly and biopsy forceps of this utility model have the following beneficial effects:

[0017] This invention provides a one-piece molded "U-shaped" forceps head, which has a simple structure and is easy to use. The opening and gripping of the jaws can be achieved by using a pull cable to extend and retract the forceps head, significantly shortening the length of the forceps head assembly. This makes it easier to extend even at the extreme bending angles of the endoscope and avoids positioning deviations caused by excessive forceps head length, improving the reliability and accuracy of the operation. Furthermore, directly controlling the opening and gripping of the jaws with a pull cable results in a faster response, allowing for quick extension and retraction of the forceps head, reducing adjustment time and shortening surgical time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the biopsy forceps disclosed in Embodiment 2 of this utility model.

[0019] Figure 2 This is a cross-sectional schematic diagram of the biopsy forceps disclosed in Embodiment 2 of this utility model.

[0020] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0021] Figure 4 This is a schematic diagram of the pliers head structure disclosed in Embodiment 1 of this utility model. Figure 1 .

[0022] Figure 5This is a schematic diagram of the pliers head structure disclosed in Embodiment 1 of this utility model. Figure 2 .

[0023] Component designation explanation

[0024] 100. Pliers head; 101. Flexible arm; 102. Pliers groove; 103. Blade; 200. Outer sleeve; 201. Narrow end; 300. Pull cord; 400. Extension sleeve; 500. Handle; 501. Slide groove; 600. Slide sleeve; 601. Embedded block; 602. Annular groove; 700. Guide sleeve; 701. Sliding cavity; 702. Limiting hole; 800. Hand ring. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Example 1

[0027] Please see Figures 3-5 This embodiment provides a forceps assembly, including an outer tube 200, a pull wire 300, and a forceps head 100. The forceps head 100 has an integral "U"-shaped structure and includes two outwardly opening elastic arms 101. The ends of the elastic arms 101 are provided with forceps grooves 102. When the two forceps grooves 102 are closed, they have a receiving cavity for accommodating biopsy tissue. The outer tube 200 is a hollow tube, and the forceps head 100 is telescopically disposed inside the outer tube 200. The pull wire 300 passes through the outer tube 200 and is connected to the rear end of the forceps head 100.

[0028] This utility model adopts an integrated "U-shaped" pliers head 100 structure. The pull wire 300 drives the pliers head 100 to extend and retract, thereby opening and closing the elastic arm 101, and thus realizing the opening and gripping of the jaws. The overall structure is simple, which can significantly shorten the length of the pliers head 100 component, making it easier to extend under the extreme bending angle of the endoscope, and avoiding the cumulative tolerance and assembly error caused by multi-link structure. The pull wire 300 responds faster, improving the reliability and accuracy of operation.

[0029] Furthermore, the elastic arm 101 is S-shaped. The S-shaped elastic arm 101 can provide a larger range of elastic deformation, ensuring that the jaws open fully and making it easy to grasp tissues. Moreover, the S-shaped rebound force is stable, ensuring that the clamp groove 102 is tightly closed and reducing the risk of sample loss.

[0030] Furthermore, the outer edge of the clamp groove 102 is integrated with a blade 103, which allows the two clamp grooves 102 to cut tissue while gripping, avoiding tissue tearing caused by pulling in traditional biopsy forceps, and improving sampling integrity and success rate.

[0031] Furthermore, an extension sleeve 400 is connected to the rear end of the outer sleeve 200. The extension sleeve 400 is a hollow tube, and the pull wire 300 passes through the extension sleeve 400. Both the extension sleeve 400 and the pull wire 300 are made of flexible material. This combination of the flexible extension sleeve 400 and the rigid outer sleeve 200 balances the pushing and bending capabilities of the biopsy forceps, reducing patient discomfort while ensuring sampling accuracy.

[0032] Furthermore, the rear end of the outer sheath 200 has a constricted portion 201 with an inner diameter smaller than that of the front end, and the front end of the extension sheath 400 is fitted around the outer periphery of the constricted portion 201. The constricted portion 201 not only limits the insertion depth of the forceps 100, facilitating subsequent sample removal, but also separates the outer sheath 200 and the extension sheath 400, preventing biopsy samples from entering the extension sheath 400.

[0033] Example 2

[0034] Please see Figures 1-3 Based on Example 1, this example further proposes a biopsy forceps, which includes the forceps head 100 assembly from Example 1.

[0035] Furthermore, the biopsy forceps also includes a handle 500 and a sliding sleeve 600. The sliding sleeve 600 is slidably fitted onto the handle 500. The extension sleeve 400 is fixedly connected to the handle 500. The rear end of the pull wire 300 is fixedly connected to the sliding sleeve 600. The extension and retraction of the pull wire 300 are achieved by the displacement of the sliding sleeve 600 relative to the handle 500.

[0036] The biopsy forceps of this invention can quickly extend and retract the forceps head 100 by sliding the sliding sleeve 600 along the handle 500, reducing adjustment time, shortening operation time, avoiding positioning deviation caused by excessive forceps head 100, reducing repeated operations and sampling failure rate, and lowering the risk of tissue damage.

[0037] Furthermore, the handle 500 has a groove 501 along its length, and the sleeve 600 is connected to an insert block 601, which passes through the groove 501 and is connected to the pull wire 300.

[0038] Furthermore, the front end of the sliding sleeve 600 is provided with a guide sleeve 700, and the guide sleeve 700 has a sliding cavity 701 for the handle 500 to slide. The front end of the guide sleeve 700 has a limiting hole 702 with a diameter that matches the extension sleeve 400. The design of the guide sleeve 700 can ensure smooth sliding between the handle 500 and the sliding sleeve 600, and avoid the pull cable 300 from getting stuck due to deviation.

[0039] Furthermore, a handgrip 800 is connected to the rear end of the handle 500, and an annular groove 602 suitable for finger gripping is provided in the middle of the sliding sleeve 600. The design of the handgrip 800 and the annular groove 602 is more ergonomic, making it easier for doctors to operate with one hand and improving surgical precision.

[0040] In summary, this invention provides a one-piece molded "U-shaped" forceps head with a simple structure and convenient use. The opening and gripping of the jaws can be achieved by using a pull cable to extend and retract the forceps head, significantly shortening the length of the forceps head assembly. This makes it easier to extend even at the extreme bending angles of the endoscope and avoids positioning deviations caused by excessive forceps head length, improving operational reliability and accuracy. Furthermore, directly controlling the opening and gripping of the jaws with a pull cable results in a faster response, allowing for quick extension and retraction of the forceps head, reducing adjustment time and shortening surgical time. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial application value.

[0041] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pliers head assembly, characterized in that, It includes an outer sheath, a pull wire, and a clamp head. The clamp head has an integral "U"-shaped structure. The clamp head includes two outwardly opening elastic arms. The ends of the elastic arms are provided with clamp grooves. When the two clamp grooves are closed, they have a receiving cavity for accommodating biopsy tissue. The outer tube is hollow and tubular. The pliers head is telescopically disposed inside the outer tube, and the pull cable passes through the outer tube and is connected to the rear end of the pliers head.

2. The clamp assembly according to claim 1, characterized in that, The elastic arm is S-shaped; the outer edge of the clamp groove has a cutting edge.

3. The clamp assembly according to claim 1, characterized in that, The outer sleeve is connected to an extension sleeve at its rear end. The extension sleeve is hollow and the pull wire passes through the extension sleeve.

4. The clamp assembly according to claim 3, characterized in that, Both the extension sleeve and the pull wire are made of flexible material.

5. The clamp assembly according to claim 3, characterized in that, The rear end of the outer sleeve has a constricted portion with an inner diameter smaller than that of the front end, and the front end of the extension sleeve is fitted onto the outer periphery of the constricted portion.

6. A biopsy forceps, characterized in that, Includes the pliers assembly as described in any one of claims 1 to 5.

7. The biopsy forceps according to claim 6, characterized in that, The biopsy forceps also includes a handle and a sliding sleeve. The sliding sleeve is slidably fitted onto the handle. The extension sleeve is fixedly connected to the handle. The rear end of the pull wire is fixedly connected to the sliding sleeve. The extension and retraction of the pull wire are achieved by the displacement of the sliding sleeve relative to the handle.

8. The biopsy forceps according to claim 7, characterized in that, The front end of the sliding sleeve is provided with a guide sleeve, and the guide sleeve is provided with a sliding cavity for the handle to slide. The front end of the guide sleeve has a limiting hole with a diameter that matches the extension sleeve.

9. The biopsy forceps according to claim 7, characterized in that, The handle has a groove along its length, and the sleeve is connected to an insert block, which passes through the groove and is connected to the pull line.

10. The biopsy forceps according to claim 7, characterized in that, The handle is connected to a hand ring at the rear end, and the slide has an annular groove in the middle suitable for finger gripping.

Images