Forceps head structure of stamping biopsy forceps

Abstract

The utility model provides a stamping biopsy forceps head structure which comprises a cup base, two forceps cups, a square piece and an annular steel wire, two symmetrical hanging lugs are arranged on the cup base, a left vertical side and a right vertical side are arranged at one end of each forceps cup, a U-shaped groove is formed between each left vertical side and the corresponding right vertical side, and the annular steel wire is arranged on the U-shaped groove. A central hole and a rotating hole are correspondingly formed in the surface of each of the left vertical side and the right vertical side, the right vertical sides of the two forceps cups are mutually inserted into the corresponding U-shaped grooves and are aligned with the central holes, a lower shaft of a hex-shaped piece is inserted into the hanging lug, and an upper shaft of the hex-shaped piece is inserted into the rotating hole. According to the biopsy forceps, two steel wire hooks are changed into an integral steel wire hook, pins used for fixing are omitted, meanwhile, connecting pieces used for transmission and fixing are added, the forceps head assembly of the whole biopsy forceps does not need any welding, riveting and compression joint process equipment and is assembled by self-structures of parts, all the parts are formed through a stamping process, and the manufacturing cost of the biopsy forceps is reduced. Cost is low, efficiency is high, and assembling is easy.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a stamped biopsy forceps head structure. Background Technology

[0002] With the rapid development of endoscopy and other related technologies, endoscopic biopsy has become an important means and basis for diagnosing lesions in the digestive system. Taking samples of living tissue using biopsy forceps under endoscopy, and then performing sectioning and pathological analysis, is particularly important. Currently, relatively inexpensive stamped hook-type biopsy forceps are available on the market. Their characteristics of fewer parts, simple structure, and low manufacturing cost make them generally considered the cheapest biopsy forceps products. However, the main structure of the widely used stamped hook-type biopsy forceps in clinical practice consists of two forceps cups, two wire hooks, a cup seat, and a pin. Assembly involves assembling the two wire hooks with the two forceps cups, then inserting the two wire hooks into the cup seat, and finally welding (or riveting) the two forceps cups and the cup seat together with the pin. Pushing and pulling the two wire hooks allows the two forceps cups to open and close. However, the shortcomings of the stamped hook-type biopsy forceps in clinical application have quickly become apparent.

[0003] 1. Insufficient biting force can lead to failure to obtain tissue or tearing and bleeding. This is because the biopsy forceps are limited by the diameter of the endoscope's forceps channel, which prevents the angle of the forceps cup handle (where it connects to the wire hook) from being large enough, resulting in low force transmission efficiency after the forceps cup is closed.

[0004] 2. If the hook comes off, the biopsy forceps will fail to take samples and will not be able to be withdrawn from the endoscope channel. The biopsy forceps will need to be withdrawn together with the endoscope and replaced with a new biopsy forceps. The endoscope will need to be lowered again to look for the lesion.

[0005] 3. The pin fixing process, whether welding or riveting, requires equipment and tooling. Changes in equipment parameters and updates to tooling all require re-verification and confirmation. In addition, whether welding or riveting is too tight, it will cause the forceps cup to open and close inflexibly, affecting the performance requirements of the biopsy forceps; if welding or riveting is too loose, it will cause misalignment after the forceps cup is closed, affecting the biting force and making it impossible to bite tissue. The process adjustment range is very narrow.

[0006] The aforementioned defects in the current stamped hook-type biopsy forceps have impacted surgical time, surgical success rate, and patients. Utility Model Content

[0007] The purpose of this invention is to provide a stamped biopsy forceps head structure, which aims to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a stamped biopsy forceps head structure, comprising: a cup base, two forceps cups, a hexagonal plate, and an annular steel wire;

[0009] The cup holder is formed by stamping and then bent into a barrel shape. The cup holder is provided with two symmetrical hanging ears. One end of the pliers cup is provided with a left upright side and a right upright side. A U-shaped groove is formed between the left upright side and the right upright side. The surfaces of the left upright side and the right upright side are respectively provided with a central hole and a rotating hole.

[0010] The top and bottom of the shaped piece are respectively the upper shaft and the lower shaft. The right upright sides of the two pliers cups are inserted into the corresponding U-shaped grooves and aligned with the center hole. The lower shaft of the shaped piece is inserted into the hanging ear, and the upper shaft of the shaped piece is inserted into the rotating hole.

[0011] The annular steel wire is symmetrically bent and a horizontal wire is formed at the top. The annular steel wire is inserted into the cup holder and the horizontal wire is installed in the central hole.

[0012] As a preferred technical solution of this utility model, a fixing buckle is also provided on the side of the hanging ear, and the fixing buckle is bent and disposed inside the cup holder to fix the hanging ear.

[0013] As a preferred technical solution of this utility model, a limiting platform is provided on the surface of the left upright side, and the limiting platform abuts against the upper shaft when the pliers cup is opened to the maximum angle.

[0014] As a preferred technical solution of this utility model, the diameter of the horizontal wire matches the inner diameter of the central hole.

[0015] As a preferred technical solution of this utility model, the cup holder, pliers cup and the hexagonal piece are all formed by stamping process.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: Compared with the existing biopsy forceps, this application transforms the two steel wire hooks into a single steel wire hook and eliminates the pins used for fixing. At the same time, it adds a connecting piece for transmission and fixing. The entire biopsy forceps head assembly does not require any welding, riveting, or crimping equipment. It is all assembled by the structure of the parts themselves. Except for the ring steel wire, all parts are formed by stamping process, which is low in cost, high in efficiency, easy to assemble, and eliminates the risk of the ring steel wire coming off the hook or insufficient biting force. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the pliers cup in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the hexagonal piece in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the annular steel wire in this utility model;

[0023] Figure 6 In this utility model Figure 1 An enlarged structural diagram of point A.

[0024] In the diagram: 1. Cup holder; 11. Hanging ear; 12. Fixing buckle; 2. Pliers cup; 21. Center hole; 22. Rotating hole; 23. Limiting platform; 24. U-shaped groove; 25. Left upright side; 26. Right upright side; 3. Hexagonal piece; 31. Upper shaft; 32. Lower shaft; 4. Circular steel wire; 41. Horizontal wire. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides the following technical solution: a stamped biopsy forceps head structure, including: a cup base 1, two forceps cups 2, a hexagonal plate 3, and an annular steel wire 4. The cup base 1 is provided with two symmetrical lugs 11. One end of the forceps cup 2 is provided with a left upright side 25 and a right upright side 26. A U-shaped groove 24 is formed between the left upright side 25 and the right upright side 26. The surfaces of the left upright side 25 and the right upright side 26 are respectively provided with a central hole 21 and a rotating hole 22. The top and bottom of the hexagonal plate 3 are respectively an upper shaft 31 and a lower shaft 32. The right upright sides 26 of the two forceps cups 2 are inserted into the corresponding U-shaped grooves 24 and aligned with the central holes 21. The lower shaft 32 of the hexagonal plate 3 is inserted into the lugs 11, and the upper shaft 31 of the hexagonal plate 3 is inserted into the rotating hole 22. The annular steel wire 4 is symmetrically bent and a horizontal wire 41 is formed at the top. The annular steel wire 4 is inserted into the cup base 1 and the horizontal wire 41 is installed in the central hole 21.

[0027] Specifically, the lower shaft 32 of the hexagonal plate 3 is inserted into the lug 11 of the cup holder 1 for connection, and the upper shaft 31 of the hexagonal plate 3 is inserted into the rotating hole 22 of the two forceps cups 2 for connection. The right upright sides 26 of the two forceps cups 2 are inserted into the U-shaped groove 24 to align the center holes 21. The horizontal wire 41 of the annular steel wire 4 completely passes through the center hole 21 of the two forceps cups 2, completing the assembly of the entire stamped biopsy forceps head. Pushing the annular steel wire 4 causes the two forceps cups 2 to open through the planetary motion of the upper shaft 31 of the two hexagonal plates 3 within the rotating hole 22, pulling... Tighten the annular steel wire 4, and the two forceps cups 2 move planetarily through the upper shaft 31 of the two hexagonal plates 3 in the rotating hole 22 until the two forceps cups 2 are completely closed. At this time, continue to tighten the annular steel wire 4, and its tension can be effectively applied to the two forceps cups 2. The entire biopsy forceps head assembly does not require any welding, riveting and crimping process equipment. It is all assembled by the structure of the parts themselves. Except for the annular steel wire 4, all parts are formed by stamping process, which is low in cost, high in efficiency, easy to assemble, and has no risk of the annular steel wire 4 coming off hook or insufficient biting force.

[0028] In this embodiment, a fixing buckle 12 is also provided on the side of the hanging ear 11. The fixing buckle 12 is bent and disposed inside the cup holder 1 and fixes the hanging ear 11.

[0029] Specifically, the hanging ear 11 is reinforced by the fixed buckle 12 to prevent the hanging ear 11 from popping open and affecting operation.

[0030] In this embodiment, a limiting platform 23 is provided on the surface of the left upright side 25. When the pliers cup 2 is opened to the maximum angle, the limiting platform 23 abuts against the upper shaft 31.

[0031] Specifically, when the two pliers cups 2 open to their maximum angle, the limiting platform 23 of the two pliers cups 2 collides and interferes with the upper shaft 31 of the hexagonal piece 3, stopping the opening. In this way, the maximum opening angle of the pliers cups 2 can be limited.

[0032] In this embodiment, the diameter of the transverse wire 41 matches the inner diameter of the central hole 21.

[0033] Specifically, this method enables the two pliers cups 2 to open and close along the axis of the cross wire 41 and the center hole 21.

[0034] In this embodiment, the cup holder 1, the pliers cup 2, and the hexagonal piece 3 are all formed by stamping.

[0035] Specifically, the above methods make the clamp head structure low in cost, high in efficiency, and easy to assemble.

[0036] It is worth noting that the force-bearing point of the forceps cup 2 when it opens and closes is both the force-bearing point and the center of symmetry of the forceps head. The annular steel wire 4 is formed by bending a single steel wire, changing from two steel wires to one steel wire and eliminating the pin used for fixing. At the same time, a connecting piece for transmission and fixing is added. The entire biopsy forceps head assembly does not require any welding, riveting, or crimping equipment. It is all assembled by the structure of the parts themselves. Except for the annular steel wire 4, all parts are formed by stamping, which is low-cost, efficient, easy to assemble, and eliminates the risk of the annular steel wire 4 coming off hook or insufficient biting force.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stamped biopsy forceps head structure, characterized in that, include: Cup holder (1), wherein two symmetrical lugs (11) are provided on the cup holder (1); Two pliers cups (2), one end of which is provided with a left upright side (25) and a right upright side (26), and a U-shaped groove (24) is formed between the left upright side (25) and the right upright side (26). The surfaces of the left upright side (25) and the right upright side (26) are respectively provided with a central hole (21) and a rotating hole (22); The top and bottom of the hexagonal piece (3) are respectively the upper shaft (31) and the lower shaft (32). The right upright sides (26) of the two pliers cups (2) are inserted into the corresponding U-shaped grooves (24) and aligned with the center hole (21). The lower shaft (32) of the hexagonal piece (3) is inserted into the hanging ear (11), and the upper shaft (31) of the hexagonal piece (3) is inserted into the rotating hole (22). A ring-shaped steel wire (4) is symmetrically bent and a cross wire (41) is formed at the top. The ring-shaped steel wire (4) is inserted into the cup holder (1) and the cross wire (41) is installed in the center hole (21).

2. The stamped biopsy forceps head structure according to claim 1, characterized in that: The side of the hanging ear (11) is also provided with a fixing buckle (12), which is bent and disposed inside the cup holder (1) and fixes the hanging ear (11).

3. The stamped biopsy forceps head structure according to claim 1, characterized in that: The surface of the left upright side (25) is provided with a limiting platform (23), and when the pliers cup (2) is opened to the maximum angle, the limiting platform (23) abuts against the upper shaft (31).

4. The stamped biopsy forceps head structure according to claim 1, characterized in that: The diameter of the transverse wire (41) matches the inner diameter of the central hole (21).

5. The stamped biopsy forceps head structure according to claim 1, characterized in that: The cup holder (1), pliers cup (2), and hexagonal piece (3) are all formed by stamping.

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