CN209751116U - Biopsy forceps with integrated forceps head - Google Patents

Abstract

The utility model discloses a biopsy forceps with integral type binding clip. The integrated tong head comprises a left tong head, a right tong head and a tong handle, wherein the left tong head and the right tong head are integrally formed, the tong handle is used for connecting the left tong head and the right tong head, the tong handle is folded in half, and a central hole is formed in the middle of the tong handle; the left forceps head and the right forceps head which are arranged at two ends of the forceps handle have elasticity and are shaped into an initial state which is opened towards the opposite direction. The integrated tong head, the pull rod pin and the pull rod pipe are assembled into a tong head sleeve piece; assembling the binding clip assembly with the binding clip suite, the pull rod positioning block and the binding clip seat; then the forceps head assembly, the pull cable, the spring tube and the control handle are assembled into the whole biopsy forceps; the structure and the assembly process of the biopsy forceps are simplified.

Description

Biopsy forceps with integrated forceps head

technical field

The utility model relates to a biopsy forceps, in particular to a biopsy forceps with an integrated forceps head.

Background technique

Biopsy forceps is a tool used to bite and sample the lesions in the abdominal cavity of the human body, and is generally used in conjunction with an endoscope. In the endoscopic examination, when pathological examination of the lesion is required, the biopsy forceps are sent into the patient's body through the endoscopic forceps channel, and the tissue of the lesion is clamped. Sampling through biopsy forceps is less painful and traumatic, so it is very popular among doctors and patients.

Biopsy forceps are generally composed of a clamp head assembly, a slender cable, a spring tube that is also slender and covered outside the cable, and a handle. One end of the cable is connected to the four-bar linkage mechanism in the clamp head assembly, and the other end is connected to the handle. One end of the spring tube is connected with the pliers head assembly, and the other end is connected with the handle. Pushing and pulling the movable handle drives the drag cable, and the drag cable drives the action of the four-bar linkage mechanism, and the four-bar linkage mechanism drives the two symmetrically arranged pincer heads on the pincer head assembly to realize opening and closing, thereby taking suspicious tissues out of the body.

In the existing clamp head assembly of biopsy forceps, two independent clamp heads are respectively connected to the clamp head bracket through rivets, and the two independent clamp heads are pushed and pulled through a four-bar linkage to realize opening and closing control of the clamp heads. The structure of the pliers head assembly is complex, and the assembly process is complex and difficult to assemble.

Contents of the invention

The technical problem to be solved by the utility model is to provide a biopsy forceps with an integrated forceps head.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A biopsy forceps with an integrated forceps head, wherein the integrated forceps head includes an integrally formed left forceps head, a right forceps head and a handle for connecting the left forceps head and the right forceps head, the The pliers handle is folded in half, and a central hole is provided in the middle of the pliers handle; the left pliers head and the right pliers head arranged at both ends of the pliers handle are elastic and shaped to open in opposite directions. initial state.

Preferably, the biopsy forceps also includes a pull rod pin and a pull rod tube; the front end of the pull rod pin is stuck in front of the center hole, and the rear end of the pull rod pin is inserted into the center hole and inserted into the pull rod tube and fixed to form a pliers set.

Wherein preferably, the tie rod pin is a T-shaped flat head tie rod pin.

Or, preferably, the pull rod pin is a needle point pull rod pin with a sampling needle at the front end; the rear end of the needle point pull rod pin passes through the central hole and is inserted and fixed with the pull rod tube; the sampling needle portion Extending forward in the sample storage slot between the left and right tongs. A protrusion protruding outward is formed at the front end of the sampling needle.

Preferably, the biopsy forceps also includes a pincer head base and a pull rod positioning block; wherein, the pincer head base is a sleeve with blind holes at both ends and a plugging sleeve in the middle, and two penetrating sleeves are provided in the plugging. Connecting holes in blind hole area;

The tie rod positioning block is a round tube fixed on the outer wall of the tie rod tube;

The pull rod tube in the pliers kit extends backward through the connecting hole, the left pliers and the right pliers are limited in the blind holes at the front end of the pliers seat; the pull rod positioning block is defined in the pliers In the blind hole at the rear end of the seat, it is used to limit the maximum distance that the pliers set can push forward.

The utility model provides a biopsy forceps with an integrated forceps head, wherein the integrated forceps head includes an integrally formed left forceps head, a right forceps head and a handle for connecting the left forceps head and the right forceps head. By assembling the one-piece clamp head, pull rod pin, and pull rod tube into a clamp head set; and assembling the clamp head set, pull rod positioning block and clamp head seat into a clamp head assembly; then assembling the clamp head assembly, cable, spring tube and control The handle is assembled into the whole biopsy forceps; the structure and assembly process of the biopsy forceps are simplified.

Description of drawings

Fig. 1 is the structural representation of the clamp head assembly of the first kind of biopsy forceps provided by the utility model;

Fig. 2 is the structural representation of the pincer head assembly of the second kind of biopsy forceps provided by the utility model;

Fig. 3A and Fig. 3B are respectively the front view schematic diagram and the top view schematic diagram of punching out the outline of the integrated biopsy forceps;

Fig. 4A and Fig. 4B are respectively the front view schematic diagram and the top view schematic diagram of the scoop cup punched out of the integrated tong head;

Figure 5A and Figure 5B are a schematic front view and a schematic side view of the finished integrated pliers, respectively;

Fig. 6A and Fig. 6B are respectively the front view schematic diagram and the side view schematic diagram of the flat-head tie rod pin;

Fig. 7 is a schematic diagram of the structure of the needle point rod pin;

Fig. 8A and Fig. 8B are respectively the schematic front view and the schematic side view of the rod tube;

Figure 9 is a schematic structural view of the assembled pliers set;

Figure 10 is a schematic structural view of the pincer seat;

Fig. 11 is a schematic structural view of the tie rod positioning block.

Detailed ways

The technical solutions of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In order to simplify the structure and manufacturing process of the biopsy forceps, the utility model provides a biopsy forceps with an integrated forceps head. The needle-free biopsy forceps and needle biopsy forceps are taken as examples below.

first embodiment

As shown in Figure 1, the needle-free biopsy forceps with an integrated forceps head includes an integrated forceps head 1, a flat head pull rod pin 2, a pull rod tube 3, a pull rod positioning block 4 and a forceps head seat 10, wherein the integrated forceps head 1 , flat head pull rod pin 2 and pull rod tube 3 form the clamp head set, after the clamp head set and clamp head seat 10, pull rod positioning block 4 are assembled, form the clamp head assembly.

Specifically, the structure of the one-piece pliers 1 is shown in FIGS. 5A and 5B , including an integrally formed left pliers 1a, a right pliers 1b and a handle 1c for connecting the left pliers 1a and the right pliers 1b. The one-piece pliers head is integrally formed from stainless steel through a stamping process. The pliers handle 1c is folded in half, and a central hole 1d is provided in the middle of the pliers handle 1c (see FIG. 3B and FIG. 4B ). The left pliers head 1a and the right pliers head 1b arranged at the two ends of the pliers handle 1c are elastic, and are shaped into an initial state of naturally opening to opposite sides; decompression pressure relief valves are respectively formed in the left pliers head 1a and the right pliers head 1b. hole 1e.

The flat head tie rod pin 2 shown in Figure 6A and Figure 6B is a T-shaped tie rod pin with a large front and a small rear, and the diameter of the head of the flat head tie rod pin 2 is greater than the aperture of the central hole 1d; the diameter of the cylinder at the rear of the flat head tie rod pin 2 It is equal to or smaller than the diameter of the central hole 1d, and is approximately equal to the inner diameter of the tie rod tube 3. The front end of the flat-head tie rod pin 2 is stuck in front of the center hole 1d, and the cylinder at the rear of the flat-head tie rod pin 2 is inserted into the center hole 1d of the integrated pliers head 1, and then inserted and fixed with the tie rod tube 3 shown in Figure 8A and Figure 8B , to form a pliers kit. The structure of the pliers kit is shown in Figure 9.

The tie rod tube 3 shown in Fig. 8A and Fig. 8B is a section of circular tube. The pull rod positioning block 4 shown in FIG. 11 is another truncated tube; the inner diameter of the pull rod positioning block 4 is equal to the outer diameter of the pull rod tube 3 .

As shown in FIG. 10 , the pincer seat 10 is a sleeve with blind holes at both ends and a plug in the middle, and a connecting hole 13 penetrating the two blind hole areas 11 and 12 is provided in the plug.

As shown in FIG. 1 , the pliers set is assembled inside the pliers seat 10 to form a pliers assembly. The tie rod tube 3 in the pliers set extends backward through the connection hole 13, and the left pliers 1a and right pliers 1b are restricted in the blind hole 11 at the front end of the pliers seat 10; the tie rod positioning block 4 is fixed on the tie rod tube 3 The circular tube on the outer wall, the pull rod positioning block 4 is defined in the blind hole 12 at the rear end of the pliers seat 10, and is used to limit the maximum distance that the pliers set can push forward.

The aforementioned forceps head assembly is subjected to the same processes as the current assembly process of the biopsy forceps, such as cable butt joint, spring tube welding, handle assembly, etc., to obtain a complete biopsy forceps.

After the clamp head assembly shown in Figure 1 is used to assemble the biopsy forceps, when the pull rod tube 3 is pulled downward under the action of the cable, the integrated forceps head 1 moves downwards and moves toward the inside of the forceps seat 10, because the left forceps head The side walls of 1a and right pliers 1b are in contact with the pliers seat 10, and the pincers are squeezed to close, thereby realizing the closing function of the pliers; when the pull rod tube 3 is pushed to move upward, the integrated pliers 1 is released from the pliers seat. Protruding inward, with the help of the elastic characteristics of the pliers, the left pliers 1a and the right pliers 1b are opened.

In this embodiment, the pliers set is obtained by assembling the integrated pliers head, the flat-head tie rod pin and the tie rod tube, and the pliers head assembly is obtained by assembling the pliers head set, the tie rod positioning block and the pliers head seat. Compared with the pliers head assembly with a four-link structure, the above pliers head assembly has simple structure, low cost and convenient assembly. The above-mentioned biopsy forceps, in addition to omitting the parts of the four connecting rods, also simplifies the assembly process such as rivet welding, and greatly improves the production and processing efficiency.

In addition, since the clamp head used in the biopsy forceps is a one-piece clamp head obtained by stamping and forming technology, the assembly precision is high, which can effectively improve the fit of the clamp head components and reduce the bleeding problem caused by sampling.

second embodiment

As shown in Figure 2, the needle biopsy forceps with an integrated forceps head includes an integrated forceps head 1, a needle point pull rod pin 5, a pull rod tube 3, a pull rod positioning block 4 and a forceps head seat 10, wherein the integrated forceps head 1 , needle point pull rod pin 5 and pull rod pipe 3 form the clamp head set, after the clamp head set and clamp head seat 10, pull rod positioning block 4 are assembled, form the clamp head assembly.

Wherein, in the forceps head set, except that the needle-tip pull-rod pin 5 is different from the flat-head pull-rod pin 2 used in the first embodiment, the rest of the structure is the same as that of the needle-free biopsy forceps provided in the first embodiment. In the needle biopsy forceps provided in this embodiment, the needle point pull rod pin 5 shown in FIG. 7 is a pull rod pin with a sampling needle part 5a at the front end, and a protrusion 5c protruding outward is provided at the front end of the sampling needle part 5a . The sampling needle part 5a extends forward in the sample storage tank between the left pliers head 1a and the right pliers head 1b, and the rear end 5b of the needle-tip rod pin 5 passes through the central hole 1d of the integrated pliers head 1 and is inserted into the rod tube 3. Connect and fix to form a pliers set.

In this embodiment, the process of assembling the jaw assembly, the jaw base 10, and the pull rod positioning block 4 into a jaw assembly, and the process of assembling the jaw assembly and other parts into a biopsy forceps are the same as in the first embodiment, and will not be described here. Repeat.

In the needle biopsy forceps, a strip-shaped sample storage groove is arranged in the forceps head base 10 . By pulling the integrated forceps head 1 backward or pushing the integrated forceps head 1 forward, multiple continuous opening and closing of the integrated forceps head 1 can be realized, and multiple continuous sampling can be completed; the sample tissues obtained by multiple samplings are sequentially stored in the On the sampling needle part 5a between the left clamp head 1a and the right clamp head 1b. During the multiple times of opening and closing of the disposable forceps 1, the protrusion 5c provided at the front end of the sampling needle part 5a can prevent the sample tissue stored on the sampling needle part 5a from falling off.

The needle biopsy forceps provided by this embodiment also has the advantages of simple structure, low cost, and convenient assembly. In addition to omitting the parts of the four-linkage, the above-mentioned structure also simplifies the assembly process such as rivet welding, and greatly improves the production and processing efficiency.

Similarly, since the clamp head used in the biopsy forceps is an integrated clamp head obtained by stamping and forming process, the assembly precision is high, which can effectively improve the anastomosis of the clamp head components and reduce the bleeding problem caused by sampling.

third embodiment

The structures of the two biopsy forceps are described in detail above, and the corresponding manufacturing methods are introduced below.

The utility model simultaneously provides a manufacturing method of a biopsy forceps with an integrated pliers head, comprising the following steps: manufacturing an integrated pliers head; assembling the integrated pliers head, a pull rod pin, and a pull rod tube into a pliers head set; assembling the pliers head set and The clamp head seat and the pull rod positioning block are assembled into a clamp head assembly; and the clamp head assembly, a drag cable, a spring tube, and a control handle are assembled into a biopsy forceps. Wherein, the material used for the entire forceps head assembly may be stainless steel materials that meet medical standards, for example, 2Cr13, 3Cr13 and other materials that meet the standards for biopsy forceps.

Specifically, firstly, the one-piece pliers head 1 is manufactured by a stamping process.

The manufacturing steps of the integrated pliers head 1 are as follows:

(1) As shown in FIG. 3A and FIG. 3B , punch out the outline of the integrated clamp head 1, and punch out two decompression holes 1e at the position of the clamp head and a center hole 1d at the center;

(2) As shown in Fig. 4A and Fig. 4B, two scoop cups (namely, the left tong head 1a and the right tong head 1b) are obtained at both ends of the integrated tong head 1 by stamping and stretching;

(3) As shown in FIGS. 5A and 5B , fold out the overall shape of the integrated clamp head 1 through stamping;

(4) Obtain the hardness and mechanical strength of the integrated pliers 1 through heat treatment.

Since the clamp head used in the biopsy forceps provided by the utility model is an integrated clamp head processed by a stamping forming process, the assembly precision is high, the anastomosis of the clamp head components can be effectively improved, and the bleeding problem caused by sampling can be reduced.

Secondly, the pliers head set is formed by assembling the integrated pliers head 1 and the pull rod pin (flat head pull rod pin 2 or needle point pull rod pin 5) and the pull rod tube together.

The steps of assembling the pliers set are as follows: After passing the pull rod pin (flat head pull rod pin 2 or needle point pull rod pin 5) through the center hole 1d of the integrated pliers head 1, insert and fix it with the pull rod tube 3 to complete the pliers head set assembly. Specifically, the tie rod pin and the tie rod tube 3 can be welded as one by means of laser welding.

When assembling needle-free biopsy forceps, the pull rod pin used is a T-shaped flat head pull rod pin 2 as shown in Figure 6A and Figure 6B; when assembled with needle biopsy forceps, the pull rod pin used is the front end as shown in Figure 7 Needle tip pull rod pin 5 with sampling needle portion 5a. Both the flat-head pull-rod pin 2 and the needle-point pull-rod pin 5 can be obtained by machining.

Thirdly, the pliers assembly is formed by assembling the above-mentioned pliers kit, pliers base 10 and pull rod positioning block.

As shown in FIG. 8A and FIG. 8B , a section of stainless steel tube can be cut out by wire cutting as the tie rod tube 3 . The tie rod positioning block 4 shown in FIG. 11 is another truncated tube; the inner diameter of the tie rod positioning block 4 is almost equal to the outer diameter of the tie rod tube 3 .

As shown in FIG. 10 , the pincer seat 10 is a sleeve with blind holes at both ends and a plug in the middle, and a connecting hole 13 penetrating the two blind hole areas 11 and 12 is provided in the plug.

The steps of assembling the pliers assembly are as follows: install the pliers set into the pliers seat 10 shown in FIG. After passing through the connection hole 13, insert it into the blind hole area 12 at the rear end of the clamp head seat 10; then set the pull rod positioning block 4 on the outer wall of the pull rod tube 3, and after determining the position of the pull rod positioning block 4, connect the pull rod positioning block 4 and the pull rod positioning block 4 by laser welding. The tie rod tube 3 is welded into one body to obtain the clamp head assembly. The function of the pull rod positioning block 4 is to limit the maximum distance that the pliers set can push forward. The position of the pull rod positioning block 4 needs to ensure that when the pull rod positioning block 4 is pushed to the blocking position of the clamp head seat 10 , the integrated clamp head 1 will not be pushed out of the clamp head seat 10 .

Finally, the forceps head assembly is subjected to the same processes as the current assembly process of the biopsy forceps, such as cable butt joint, spring tube welding, and handle assembly, to obtain a complete biopsy forceps.

After assembling the biopsy forceps with the forceps head assembly, when the pull rod tube is pulled downward under the action of the cable, the integrated forceps head 1 moves downward toward the forceps seat 10, because the left forceps head 1a and the right forceps head 1b The side wall of the pliers is in contact with the pliers seat 10, and the extrusion forces the two pliers of the integrated pliers 1 to close, thereby realizing the closing function of the pliers; when the pull rod tube is pushed upward, the left pliers 1a and the right pliers 1b protrude from the pliers seat 10 respectively, and realize the function of opening the pliers by virtue of the elastic characteristics of the integrated pliers 1 itself.

The utility model provides a new type of biopsy forceps. The clamp head assembly is composed of an integrated clamp head 1, a needle point pull rod pin 5 or a flat pull rod pin 2, a pull rod tube 3, a pull rod positioning block 4 and a clamp head seat 10. Its advantages lie in simple assembly and low cost. Compared with various clamp head components currently used, the parts of the connecting rod are omitted, the assembly process such as rivet welding is simplified, and the production and processing efficiency is greatly improved.

To sum up, the biopsy forceps provided by the utility model has an integrated clamp head, by assembling the clamp head set with the integrated forceps head, pull rod pin, and pull rod tube; , assemble the forceps head assembly; then assemble the forceps head assembly, the cable, the spring tube and the control handle into the whole biopsy forceps; simplify the structure and assembly process of the biopsy forceps.

The biopsy forceps with an integrated forceps head provided by the present invention has been described in detail above. For those skilled in the art, any obvious changes made to the utility model without departing from the essential spirit of the utility model will constitute an infringement of the utility model patent and will bear corresponding legal responsibilities.

Claims (6)

1. The biopsy forceps with the integrated forceps heads are characterized by comprising the integrated forceps heads, wherein the integrated forceps heads comprise a left forceps head, a right forceps head and a forceps handle, the left forceps head and the right forceps head are integrally formed, the forceps handle is used for connecting the left forceps head and the right forceps head, the forceps handle is folded, and a central hole is formed in the middle of the forceps handle; the left forceps head and the right forceps head which are arranged at two ends of the forceps handle have elasticity and are shaped into an initial state which is opened towards the opposite direction.

2. The bioptome of claim 1, further comprising a pull rod pin and a pull rod tube;

The front end of the pull rod pin is clamped in front of the central hole, and the pull rod pin is inserted into the central hole of the integrated tong head and then is spliced and fixed with the pull rod pipe to form a tong head external member.

3. The bioptome of claim 2, wherein:

The pull rod pin is a T-shaped flat head pull rod pin.

4. The bioptome of claim 2, wherein:

The pull rod pin is a needle point pull rod pin with a sampling needle part at the front end; the rear end of the needle point pull rod pin penetrates through the central hole and then is inserted into and fixed with the pull rod pipe; the sampling needle portion extends forward within the sample storage slot between the left and right jaws.

5. The bioptome of claim 4, wherein:

A projection protruding outward is formed at the tip of the sampling needle part.

6. The biopsy forceps of claim 2, further comprising a forceps head base and a pull rod positioning block; the clamp head seat is a sleeve with blind holes at two ends and a plug arranged in the middle, and a connecting hole penetrating through two blind hole areas is arranged in the plug;

The pull rod pipe in the tong head suite passes through the connecting hole and extends backwards, and the left tong head and the right tong head are limited in the blind hole at the front end of the tong head seat;

The pull rod positioning block is a round pipe fixed on the outer wall of the pull rod pipe, and is limited in a blind hole in the rear end of the tong head seat and used for limiting the maximum forward pushing position of the tong head suite.