Biopsy forceps

Abstract

The biopsy forceps comprise a handle assembly, a forceps rod assembly is connected to the upper portion of the handle assembly, the forceps rod assembly comprises a spring tube, a plurality of limiting clamping sleeves are evenly arranged at the positions, close to a forceps head assembly, of the outer portion of the spring tube in a sleeved mode, clamping sleeves are clamped outside the limiting clamping sleeves, and the limiting clamping sleeves are connected with the clamping sleeves in a sleeved mode. A lubricating liquid cavity for storing lubricating liquid is formed in the clamping sleeve, a liquid outlet groove communicated with the lubricating liquid cavity is formed in the clamping sleeve, and an elastic piece penetrating out of the lubricating liquid cavity from the liquid outlet groove is fixedly connected to the inner wall of the lubricating liquid cavity. And the distance between two symmetrical points on the peripheries of the middle parts and the lower parts of the two elastic sheets is greater than the diameter of the widest part of an endoscope jaw opening. According to the utility model, the length of the forceps head assembly extending out of the endoscope forceps channel can be selected according to the condition of an affected part in the body of a patient, so that the situation that the forceps head assembly is too long in the body of the patient and accidentally hurts normal tissues of the patient is avoided, the safety of using products by an operator is greatly improved, and accidental injury is reduced.

Description

Technical Field

[0001] This utility model relates to the field of biopsy forceps technology, specifically to a biopsy forceps. Background Technology

[0002] Biopsy forceps are used in conjunction with endoscopes and are clinically suitable for the grasping of tissue specimens and the removal of small polyps. The biopsy forceps consist of a handle assembly, a bar assembly, and a head assembly. The handle assembly comprises a core bar and a sliding handle fitted onto the core bar. The bar assembly consists of an external spring tube and an internal cable. The core bar is welded to the spring tube, and the sliding handle is movably connected to the cable. The head assembly includes a clamp seat, clamps fixed to the clamp seat, and a pull rod connector linked to the clamps. The pull rod connector is connected to the cable, and the clamp seat is fixed to the spring tube.

[0003] In clinical practice, the length of the biopsy forceps spring tube is generally matched with the length of the endoscope forceps channel. The length of the endoscope forceps channel and the length of the biopsy forceps spring tube used for the corresponding examination are generally fixed values. Under normal circumstances, as the endoscope moves inside the patient's body, the real-time image inside the patient is observed, and the biopsy forceps are used to grasp the sample. However, the situation inside the patient's body is different. This may occur when the biopsy forceps are inserted into the endoscope forceps channel. Due to the inertia of the medical staff inserting the biopsy forceps, the biopsy forceps are inserted too far into the patient's body, accidentally damaging the patient's normal tissue. Utility Model Content

[0004] The purpose of this invention is to provide a biopsy forceps to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a biopsy forceps, comprising: a handle assembly, a forceps rod assembly connected above the handle assembly, the forceps rod assembly including a spring tube, a plurality of limiting sleeves uniformly sleeved around the spring tube near the forceps head assembly, a retaining sleeve clamped to the outside of the limiting sleeve, a lubricating fluid cavity for storing lubricating fluid being opened inside the retaining sleeve, an outlet groove communicating with the lubricating fluid cavity being opened on the retaining sleeve, and a spring piece fixedly connected to the inner wall of the lubricating fluid cavity, extending out of the lubricating fluid cavity from the outlet groove, the distance between two symmetrical points on the periphery of the middle and lower parts of the two spring pieces being greater than the widest diameter of the endoscope forceps orifice.

[0006] Furthermore, a protruding ring is provided on the lower inner side of the limiting sleeve near the spring tube, and two symmetrically arranged limiting cards are fixedly connected to the inner side of the sleeve. A slot is provided on the lower outer side of the limiting card. When the sleeve engages with the limiting sleeve, the protruding ring is engaged in the slot.

[0007] Furthermore, the bottom inner side of the limiting card and the top outer side of the limiting sleeve are rounded.

[0008] Furthermore, a sealing ring is fitted on the outer side of the spring sheet, and the sealing ring is located inside the liquid outlet groove.

[0009] Furthermore, the handle assembly includes a core rod and a slide rod sleeved on the core rod. The top of the core rod is fixedly connected to the bottom of a spring tube. A pull cable is provided inside the spring tube. One end of the pull cable is movably connected to the pliers assembly, and the other end is fixedly connected to the slide rod.

[0010] Furthermore, the clamp head assembly includes a clamp base, on which a four-bar linkage is movably connected. Two clamp heads are symmetrically arranged on the two links of the four-bar linkage, and the end of the cable passes through the clamp base and is movably connected to the four-bar linkage.

[0011] In the above technical solution, the biopsy forceps provided by this utility model have the following beneficial effects:

[0012] This invention, by incorporating a retaining sleeve, ensures that when medical personnel insert the spring tube into the endoscope forceps channel, the two spring clips will be engaged at the endoscope forceps channel opening. The two spring clips also bend inwards, securing them in place. Simultaneously, the lubrication groove opens, allowing lubricant in the lubrication chamber to flow out along the spring clips, facilitating the removal of the two spring clips from the endoscope forceps channel opening. Furthermore, multiple limiting sleeves allow for selection of the length of the forceps head assembly extending beyond the endoscope forceps channel based on the patient's condition, preventing the forceps head assembly from being inserted too far into the patient's body and potentially damaging normal tissue. This significantly improves the safety of the operator and reduces accidental injury.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;

[0017] Figure 2 Provided for the embodiments of this utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3This is a schematic diagram of the ferrule structure provided in an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the clamp head assembly structure provided in an embodiment of the present utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Handle assembly; 11. Core rod; 12. Slide rod; 2. Clamping bar assembly; 21. Bourdon tube; 22. Cable; 3. Clamping head assembly; 31. Four-bar linkage; 32. Clamping head; 33. Clamping seat; 4. Limiting sleeve; 41. Protruding ring; 5. Sleeve; 51. Lubricating fluid chamber; 52. Fluid outlet groove; 53. Spring; 54. Sealing ring; 55. Limiting clip; 551. Slot. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Please see Figures 1-4 A biopsy forceps includes: a handle assembly 1, a forceps rod assembly 2 connected above the handle assembly 1, the forceps rod assembly 2 including a spring tube 21, a plurality of limiting sleeves 4 uniformly sleeved on the outside of the spring tube 21 near the forceps head assembly 3, a retaining sleeve 5 being snapped onto the outside of the limiting sleeve 4, a lubricating fluid cavity 51 being opened inside the retaining sleeve 5, an outlet groove 52 communicating with the lubricating fluid cavity 51 being opened on the retaining sleeve 5, and a spring piece 53 being fixedly connected to the inner wall of the lubricating fluid cavity 51, which passes through the outlet groove 52 and exits the lubricating fluid cavity 51, the distance between two symmetrical points on the outer periphery of the middle and lower parts of the two spring pieces 53 being greater than the widest diameter of the endoscope forceps channel.

[0024] Specifically, this invention, by setting a retainer 5, allows the two spring pieces 53 to be locked at the endoscope forceps opening when medical personnel insert the spring tube 21 into the endoscope forceps channel. The two spring pieces 53 also bend inwards, securing themselves at the endoscope forceps opening. Simultaneously, the fluid outlet 52 is opened, allowing the lubricating fluid in the lubrication chamber 51 to flow out along the spring pieces 53, facilitating the removal of the two spring pieces 53 from the endoscope forceps opening. Furthermore, multiple limiting sleeves 4 allow for selection of the length of the forceps assembly 3 extending beyond the endoscope forceps channel according to the patient's condition, preventing the forceps assembly 3 from being inserted too far into the patient's body and potentially injuring normal tissues. This significantly improves the safety of the operator using the product and reduces accidental injury.

[0025] Furthermore, a raised ring 41 is provided on the lower inner side of the limiting sleeve 4 near the spring tube 21. Two symmetrically arranged limiting cards 55 are fixedly connected to the inner side of the sleeve 5. A slot 551 is provided on the lower outer side of the limiting card 55. When the sleeve 5 is engaged with the limiting sleeve 4, the raised ring 41 is engaged in the slot 551. The bottom inner side of the limiting card 55 and the top outer side of the limiting sleeve 4 are rounded.

[0026] Specifically, the three limiting sleeves 4 are fixedly sleeved on the outside of the spring tube 21. The steps for inserting the ferrule 5 into the limiting sleeve 4 are as follows: First, the ferrule 5 is sleeved off the top of the clamping head assembly 3. The ferrule 5 moves downward along the outer wall of the spring tube 21. The limiting card 55 first contacts the top of the limiting sleeve 4. The downward force applied to the ferrule 5 causes the limiting card 55 to bend outward, and the limiting sleeve 4 to bend inward, so that the inner wall of the limiting card 55 is in contact with the outer wall of the limiting sleeve 4. Slide until the limiting card 55 disengages from the outer wall of the limiting sleeve 4, push the sleeve 5 upward so that the limiting card 55 is inserted into the gap formed between the limiting sleeve 4 and the spring tube 21, and so that the protruding ring 41 is engaged in the slot 551, thus completing the fixation of the limiting sleeve 4 and the sleeve 5. When it is necessary to change the position of the sleeve 5 on the spring tube 21, use scissors to destroy the sleeve 5, and repeat the above steps with a new sleeve 5 to assemble the limiting sleeve 4 and the sleeve 5.

[0027] Furthermore, a sealing ring 54 is fitted on the outer side of the spring piece 53, and the sealing ring 54 is located inside the liquid outlet groove 52.

[0028] Specifically, by adding a sealing ring 54 to the outer sleeve of the spring 53, the sealing performance of the lubricating fluid cavity 51 is enhanced, ensuring that the lubricating fluid outlet groove 52 can only be opened to discharge the lubricating fluid when the ferrule 5 is locked in the endoscope forceps orifice. The lubricating fluid is composed of components that are harmless to the human body, such as water-based medical lubricating fluid.

[0029] Furthermore, the handle assembly 1 includes a core rod 11 and a slide rod 12 sleeved on the core rod 11. The top of the core rod 11 is fixedly connected to the bottom of the spring tube 21. A pull cable 22 is provided inside the spring tube 21. One end of the pull cable 22 is movably connected to the pliers assembly 3, and the other end is fixedly connected to the slide rod 12. The pliers assembly 3 includes a pliers seat 33. A four-bar linkage 31 is movably connected to the pliers seat 33. Two pliers 32 are symmetrically arranged on the two links of the four-bar linkage 31. The end of the pull cable 22 passes through the pliers seat 33 and is movably connected to the four-bar linkage 31.

[0030] For details, please refer to Figure 1 The sliding rod 12 slides outside the core rod 11, causing the cable 22 to move vertically. (Reference) Figure 4This allows the four-bar linkage 31 to control the opening and closing of the clamp heads 32. Two connecting rods arranged on the outer side of the four-bar linkage 31 are rotatably connected to the clamp base 33 at one end and fixedly connected to the clamp heads 32 at the other end. An inner connecting rod is rotatably arranged in the middle of the connecting rod, and the other end of the inner connecting rod is rotatably arranged on the cable 22, thereby realizing the movement of the cable 22 to drive the two clamp heads 32 to open or close.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A biopsy forceps comprising: Handle assembly (1), characterized in that: the handle assembly (1) is connected with the clamp rod assembly (2) above, the clamp rod assembly (2) includes spring pipe (21), the spring pipe (21) is uniformly provided with a plurality of limiting sleeve (4) outside near the clamp head assembly (3) position, the limiting sleeve (4) is clamped with the sleeve (5) outside, the sleeve (5) is provided with lubricating liquid cavity (51) that stores lubricating liquid inside, the sleeve (5) is provided with the liquid outlet groove (52) that communicates lubricating liquid cavity (51) on, the lubricating liquid cavity (51) inner wall is fixedly connected with the spring piece (53) that goes out lubricating liquid cavity (51) from the liquid outlet groove (52), the distance size between the two spring piece (53) middle and below part periphery symmetry two points is greater than the widest place diameter size of endoscope clamp channel.

2. The biopsy forceps according to claim 1, wherein, The limiting sleeve (4) is provided with the convex ring (41) near the inner side middle and lower part of spring pipe (21), the inner side of sleeve (5) is fixedly connected with the two limiting clamping pieces (55) arranged symmetrically, the limiting clamping piece (55) is provided with the clamping groove (551) in the outer side middle and lower part, when the sleeve (5) is clamped with limiting sleeve (4), the convex ring (41) is clamped into the clamping groove (551).

3. The biopsy forceps according to claim 2, wherein, The bottom inner side of limiting clamping piece (55) and the top outer side of limiting sleeve (4) are rounded.

4. The biopsy forceps according to claim 3, wherein, The outer side of spring piece (53) is provided with sealing ring (54), and the sealing ring (54) is located in the liquid outlet groove (52).

5. The biopsy forceps according to claim 1, wherein, The handle assembly (1) includes a core rod (11) and a slide rod (12) sleeved outside the core rod (11), the top of the core rod (11) is fixedly connected with the bottom of the spring pipe (21), the spring pipe (21) is provided with a cable (22) inside, one end of the cable (22) is movably connected with the clamp head assembly (3), and the other end is fixedly connected with the slide rod (12).

6. The biopsy forceps according to claim 5, wherein, The clamp head assembly (3) includes a clamp seat (33), the clamp seat (33) is movably connected with a four-bar linkage (31), two clamping heads (32) are symmetrically arranged on two connecting rods of the four-bar linkage (31), and the end of the cable (22) is movably connected with the four-bar linkage (31) after passing through the clamp seat (33).

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