CN212234520U - Continuous sampling biopsy forceps - Google Patents

Abstract

The utility model discloses a continuous sampling biopsy forceps, comprising a forceps head frame, a left forceps head, a right forceps head, a support mechanism and a sampling needle; the forceps head frame includes a base, a left bracket, a right bracket and an arched platform; a support mechanism The left clamp head is rotatably connected to the left bracket, and the right clamp head is rotatably connected to the right support; the middle part of the support mechanism is provided with a through hole for accommodating the sampling needle; the middle part of the support mechanism is spaced from the clamp head handle of the left clamp head and the plier head handle of the right plier head; the sampling needle is located above the support mechanism, and the part between the plier head handle of the left plier head and the plier head handle of the right plier head forms a sample storage space. In the above structure, the support mechanism can ensure that the position of the needle tip of the sampling needle is accurate and does not shake, and at the same time, the support mechanism can enhance the stability of the forceps head frame and facilitate continuous sampling operations.

Description

Continuous sampling biopsy forceps

technical field

The utility model relates to a continuous sampling biopsy forceps, which belongs to the field of medical instruments.

Background technique

Biopsy forceps is a tool used for biting and sampling the lesions in the human abdominal cavity, and is generally used in conjunction with endoscopes. In endoscopy, when the pathological examination of the lesion site is required, the biopsy forceps are sent into the patient through the endoscope forceps channel, and the tissue of the lesion site is clamped. Sampling with biopsy forceps is less painful and less invasive, so it is very popular among doctors and patients.

In the forceps head assembly of the existing biopsy forceps, the two forceps heads are hinged on the forceps head frame by the same rivet. Due to the limited sample storage space in the forceps head assembly, the existing needle biopsy forceps and needleless biopsy forceps can only be used for one or a small amount of sampling. However, during routine endoscopy, a lesion or a biopsy usually requires about 3 to 4 specimens. Using the above biopsy forceps requires about 3 to 4 times of advancing and retreating the forceps through the endoscope channel, and each insertion After the forceps, the objective lens of the endoscope and the forceps head of the biopsy forceps must be adjusted, which is time-consuming and labor-intensive. Furthermore, a small amount of bleeding will begin to occur within a few seconds after the inspection of each wound surface, and it will take 1 to 5 minutes to stop on its own. This small amount of bleeding will contaminate the lesion, affect the visual field, and reduce the accuracy of subsequent inspections. For this reason, if a biopsy forceps for continuous sampling can be made, so that it can quickly complete the sampling of the same lesion or the same biopsy during one operation of the forceps, it will reduce the difficulty of sampling operation, reduce the sampling time, and thus reduce the The patient suffers.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to provide a continuous sampling biopsy forceps.

In order to realize the above-mentioned technical purpose, the utility model adopts the following technical scheme:

According to the embodiment provided by the present utility model, a continuous sampling biopsy forceps includes a forceps head frame, a left forceps head, a right forceps head, a support mechanism and a sampling needle;

The forceps head frame includes a base, a left support, and a right support, and the left support and the right support are oppositely arranged on two sides of the base;

the support mechanism rotatably connects the left pliers head to the left bracket, and rotatably connects the right pliers head to the right bracket;

The middle part of the support mechanism is provided with a through hole; the through hole accommodates the sampling needle; the middle part of the support mechanism is spaced apart from the clamp head handle of the left clamp head and the clamp head handle of the right clamp head, the The sampling needle is located above the support mechanism, and the part between the forceps handle of the left forceps head and the forceps handle of the right forceps head forms a sample storage space.

According to an embodiment provided by the present invention, the support mechanism includes a first connecting member and a second connecting member, wherein the first connecting member includes a first connecting portion and a supporting portion; the first connecting portion is connected from the supporting portion. The first connecting part is used for hingedly connecting the pliers handle of the left pliers to the left bracket; the supporting part is away from the side of the first connecting part A connecting hole perpendicular to the through hole is provided;

The second connecting piece is used for hingedly connecting the plier head handle of the right pliers head to the right bracket, and one end of the second connecting piece penetrates into the connecting hole,

The through hole is provided in the support portion.

According to the embodiment provided by the present invention, the support mechanism includes a symmetrical first support member and a second support member;

the first supporting part includes a left connecting part, a left supporting part, a left semi-cylindrical through hole, a first matching part and a second matching part;

the second supporting part includes a right connecting part, a right supporting part, a right semi-cylindrical through hole, a first matching part and a second matching part;

The left connecting part is used for hingedly connecting the plier head handle of the left plier head to the left bracket; the right connecting part is used for hingedly connecting the plier head handle of the right plier head to the right bracket;

Through the connection of the first matching part and the second matching part, the left support part and the right support part form a support part, and the left semi-cylindrical through hole and the right semi-cylindrical through hole form a support part. the through hole.

According to the embodiment of the present invention, the support mechanism includes a first pivot piece, a second pivot piece and a support piece; connecting holes are respectively opened on both sides of the support piece, and the first pivot piece The part and the second pivoting part are respectively connected to both sides of the supporting part through connecting holes;

The first pivot piece is used to hinge the plier head handle of the left plier head to the left bracket; the second pivot piece is used to hinge the plier head handle of the right plier head to the right bracket;

The through hole is provided on the support.

Preferably, the forceps head frame further comprises an arched platform, and the arched platform extends from the front end of the base to between the left bracket and the right bracket;

The sampling needle is arranged on the arched platform, the sampling needle passes through the through hole, and the front end of the sampling needle extends to the jaws of the left forceps head and the right forceps between the jaws of the head.

Preferably, the continuous sampling biopsy forceps further comprises a left connecting rod and a right connecting rod;

The rear end of the left clamp head is hinged with the front end of the right connecting rod, and the rear end of the right connecting rod enters the inside of the base from the gap on the right side of the arched platform in the clamp head frame; The rear end of the forceps head is hinged with the front end of the left connecting rod, and the rear end of the left connecting rod enters the interior of the base from the gap on the left side of the arched platform in the forceps head frame.

Preferably, the thicknesses of the left link and the right link are respectively equal to or slightly smaller than the width of the gaps on both sides of the arched platform.

Preferably, the rear ends of the left link and the right link are hinged with the top end of the pull rod through guide rivets.

Preferably, the rear end of the pull rod is connected with a connecting pipe.

Preferably, a sleeve is connected to the lower part of the forceps head frame, blind holes are formed at both ends of the sleeve, and a blocking part is formed in the middle, and a through hole for limiting the position is arranged in the center of the blocking part. hole;

The tie rod and the connecting pipe pass through the through hole for positioning.

Preferably, the sampling needle comprises a cylindrical needle body, a conical cylindrical needle tip is formed at the front end of the needle body, and an arrow-shaped protrusion protruding outward is formed at the front end of the needle tip.

In the continuous sampling biopsy forceps provided by the utility model, the forceps head handle of the left forceps head and the forceps head handle of the right forceps head are rotatably connected to both sides of the front end of the forceps head frame through a supporting mechanism, and upper and lower jaws are arranged in the middle of the supporting mechanism. Through the through hole, the sampling needle passes through the through hole, the support mechanism can ensure the accurate position of the needle tip and will not shake, at the same time, it can enhance the stability of the clamp head frame and reduce the shaking of the left clamp head and the right clamp head. It is convenient for continuous sampling operation. In the above structure, the middle part of the support mechanism is spaced apart from the clamp head handle of the left clamp head and the clamp head handle of the right clamp head, so that a sample accommodating sample is formed between the clamp head handles of the two clamp heads and between the jaws above the support mechanism. Space, sample storage space is large, which is conducive to multiple consecutive sampling.

Description of drawings

Fig. 1 is the schematic diagram of the open state of the continuous sampling biopsy forceps provided by the first embodiment;

Fig. 2 is the top view structure schematic diagram of continuous sampling biopsy forceps shown in Fig. 1;

Fig. 3 is the O-O sectional structure schematic diagram of the continuous sampling biopsy forceps shown in Fig. 2;

Fig. 4 is the closed state schematic diagram of the continuous sampling biopsy forceps shown in Fig. 1;

FIG. 5A is a cross-sectional structural schematic diagram of a viewing angle of the continuous sampling biopsy forceps shown in FIG. 4;

5B is a cross-sectional structural schematic diagram of another view of the continuous sampling biopsy forceps shown in FIG. 4;

Fig. 6 is the structural representation of the clamp head frame;

Fig. 7 is the top view structure schematic diagram of the clamp head frame;

Fig. 8A is the A-A sectional structure schematic diagram of the forceps head frame shown in Fig. 7;

Fig. 8B is a B-B cross-sectional structural schematic diagram of the forceps head holder shown in Fig. 7;

Fig. 9 is the structural representation of pliers head;

10 is a schematic structural diagram of a first connector in the support mechanism;

Figure 11 is a schematic front view of the first connector;

Figure 12 is a schematic cross-sectional view of the first connector;

Figure 13 is a schematic structural diagram of the second connector in the support mechanism;

Figure 14 is a schematic structural diagram of a connecting rod;

Figure 15 is a schematic structural diagram of a pull rod;

Figure 16 is a schematic structural diagram of the casing;

Figure 17 is a schematic cross-sectional view of the casing;

Figure 18 is a schematic structural diagram of a sampling needle;

Figure 19 is a schematic structural diagram of the support mechanism in the second embodiment;

Fig. 20 is the structural schematic diagram of the support mechanism in the third embodiment;

FIG. 21 is a schematic cross-sectional structural diagram of a support member in the support mechanism shown in FIG. 20 .

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

For the convenience of understanding, "up", "down", "left" and "right" in the following description of the present invention are the directions in the drawings, and do not constitute a limitation to the present invention.

In the embodiment provided by the present utility model, the continuous sampling biopsy forceps includes the forceps head assembly as shown in Fig. 1 to Fig. 5B , and also includes a cable, a spring tube and an operating handle (not shown) connected to the forceps head assembly. . The pliers head assembly includes a pliers head frame 1, a left pliers head 2a, a right pliers head 2b, a support mechanism 3, a left connecting rod 4a, a right connecting rod 4b, a pull rod 5, a guide rivet 6, a sampling needle 7, a sleeve 8 and a connecting pipe 9. The forceps head frame 1 includes a base 11, a left bracket 12a, and a right bracket 12b. The left bracket 12a and the right bracket 12b are disposed on opposite sides of the abutment 11; the support mechanism 3 rotatably connects the left forceps head 2a to the left bracket 12a, and rotatably connects the right forceps head 2b to the right bracket 12b; the middle part of the support mechanism 3 is provided with a through hole 32; the through hole 32 accommodates the sampling needle 7; With the handle 21b of the right forceps 2b and the sampling needle 7 above the support mechanism 3, the part between the handle 21a of the left forceps 2a and the handle 21b of the right forceps 2b forms a sample storage space.

In the first embodiment provided by the present invention, the support mechanism 3 includes a first connecting piece 3a and a second connecting piece 3b. For ease of understanding, in the following description, the rivet 3b is used as an example to represent the second connector. Similarly, the second connecting member may also adopt a connecting column or other connecting member that realizes the pivoting function.

6, 7, 8A and 8B, the forceps head frame 1 includes a base 11 (eg, a round tube), a left bracket 12a, a right bracket 12b and an arched platform 10; the left bracket 12a, the right bracket 12b, the arched platform 10 and the base 11 are integrally formed.

Preferably, the base 11 can be realized by a round tube, so as to facilitate the movement and rotation of the biopsy forceps for continuous sampling in the human body. Hereinafter, the circular tube 11 is used as an example for description.

The left bracket 12a and the right bracket 12b extend forward from the front end of the circular tube 11, respectively. "Front" in this application refers to the front from the operator's perspective when the operator holds the biopsy forceps. The left bracket 12a and the right bracket 12b are disposed on opposite sides of the front end of the circular tube 11, and a guide groove 100 is formed between the left bracket 12a and the right bracket 12b.

An arched platform 10 is provided at the bottom of the guide groove 100 , and the arched platform 10 extends from the front end of the round tube 11 into the guide groove 100 . The arched platform 10 is located between the left bracket 12a and the right bracket 12b. The length direction of the arched platform 10 is perpendicular to the line connecting the left bracket 12a and the right bracket 12b. A gap 101 for the left link 4a to pass through is formed between the arched platform 10 and the left bracket 12a; a gap 102 for the right link 4b to pass through is formed between the arcuate platform 10 and the right bracket 12b.

The structure of the first connector 3a is shown in FIGS. 10 to 12 . The first connecting member 3 a includes a first connecting portion 30 and a supporting portion 31 . The first connection portion 30 extends from the side of the support portion 31 facing the left bracket 12a. The support portion 31 is located in the middle of the support mechanism 3 , and the middle portion of the support portion 31 has a through hole 32 and a connection hole 33 . The through hole 32 penetrates vertically and is used for accommodating the sampling needle 7 . The connecting hole 33 is disposed on the side of the support portion 31 away from the first connecting portion 30 , and the connecting hole 33 is perpendicular to the through hole 32 . The connection hole 33 may be a through hole communicating with the through hole 32 or a blind hole not communicating with the through hole 32 .

As shown in FIG. 2 , the first connecting portion 30 is used for hingedly connecting the forceps handle 21a of the left forceps 2a (represented by the forceps handle 21 in FIG. 9 ) to the inner side of the front end of the left bracket 12a (as shown in FIG. 4 ). , that is, the opposite side of the left bracket 12a and the right bracket 12b). The rivet 3b shown in FIG. 13 is used to hinge the pliers handle 21b of the right pliers 2b (represented by the pliers handle 21 in FIG. 9 ) to the inner side of the front end of the right bracket 12b (as shown in FIG. 4 , that is, the right The side of the bracket 12b opposite to the left bracket 12a). In addition, one end of the rivet 3b penetrates into the connection hole 33 to realize the connection between the first connector 3a and the rivet 3b (ie, the second connector). The first connector 3a and the second connector 3b constitute the support mechanism 3 . A support portion 31 provided in the middle of the support mechanism 3 is used to space apart the jaw handles 21a, 21b of the left jaw 2a and the right jaw 2b.

Connecting holes 13a and 13b are provided at the front ends of the left bracket 12a and the right bracket 12b, respectively. As shown in FIG. 5A , the first connecting part 30 passes through the hinge hole 25a (shown as 25 in FIG. 9 ) provided at the waist of the left forceps head 2a and the connecting hole 13a provided at the front end of the left bracket 12a in sequence, so that the left forceps head 2a The pliers handle 21a is hinged on the inner side of the front end of the left bracket 12a, and the first connecting part 30 is fixed with the left bracket 12a. The rivet 3b passes through the hinge hole 25b (shown as 25 in FIG. 9 ) provided at the waist of the right forceps head 2b and the connecting hole 13b provided at the front end of the right bracket 12b in sequence, so that the forceps handle 21b of the right forceps head 2b is hinged to the right bracket 12b, and one end of the rivet 3b close to the support portion 31 is inserted into the connecting hole 33, and the other end of the rivet 3b is fixed to the right bracket 12b.

In the continuous sampling biopsy forceps, the left forceps head 2a and the right forceps head 2b are hinged on both sides of the front end of the forceps head frame through the first connecting part 30 and the rivet 3b (ie the second connecting piece) respectively. Wherein, the first connecting part 30 is provided on the left side of the supporting part 31, and the rivet 3b is connected to the right side of the supporting part 31, so that the first connecting part 30 is spaced from the rivet 3b. The left plier head 2a and the right plier head 2b are respectively installed on the first connecting part 30 and the rivet 3b, so by making the outer dimension of the support part 31 larger than that of the first connecting part 30 and the rivet 3b, and making the left plier head 2a The width dimension between the pliers handle 21a of the right pliers head 2b and the pliers head handle 21b of the right pliers head 2b matches the size of the support portion 31, so that the support portion 31 is spaced apart from the pliers head handle of the left pliers head 2a and the pliers head handle of the right pliers head 2b. , so that a sample storage space is formed between the jaws of the forceps head 2a and the forceps head 2b, and is used for accommodating the sampled sample. In the above structure, the sampled sample can be dropped between the two forceps head handles 21a and 21b above the support portion 31, therefore, the sample storage space is large, which is also conducive to multiple consecutive sampling. At the same time, since the first connector 3a and the rivet 3b fix the left bracket 12a and the right bracket 12b of the forceps head frame 1 together, the stability of the forceps head frame 1 is enhanced, and the shaking of the left forceps head 2a and the right forceps head 2b is reduced. , which is convenient for continuous sampling operation. Preferably, the thickness of the pliers handle of the left pliers 2a is close to the distance between the support portion 31 and the left bracket 12a; the thickness of the pliers handle of the right pliers 2b is close to the distance between the support portion 31 and the right bracket 12b By approaching, the shaking and dislocation of the left forceps head 2a and the right forceps head 2b can be further reduced.

The structures of the left forceps head 2a and the right forceps head 2b used in the continuous sampling biopsy forceps are basically the same, and the structures of the two forceps heads are described in detail below by taking the single forceps head shown in FIG. 9 as an example.

The pliers head includes a jaw 22 at the front and a pliers head handle 21 at the rear. Wherein, the jaw 22 comprises a smooth arc-shaped casing, a jaw cavity is formed inside the arc-shaped casing, a through hole 23 is opened in the center of the jaw cavity, and a cutting edge 24 is provided on the edge of the jaw cavity. The cutting edges 24 of the two pliers heads are both provided on the outer side of the pliers heads. When the two pliers heads 2a and 2b are closed, the two cutting edges 24 align and fit together, and form a shearing surface at the closed position of the two pliers heads.

The pliers handle 21 is an approximately zigzag connecting part, the front end of the pliers handle 21 is connected to one side edge of the jaw 22, and the rear end forms a curved handle 26 close to the centerline of the jaw through an arc transition.

The left plier head 2a and the right plier head 2b are hinged to the inner side of the front ends of the left bracket 12a and the right bracket 12b respectively through the first connecting piece 3a and the second connecting piece 3b, and the front end 2a-1 of the left plier head 2a and the right plier head 2b The front end 2b-1 (that is, the jaws 22 of the left jaw 2a and the right jaw 2b) performs the opening and closing action, and the rear end 2a-2 of the left jaw 2a and the rear end 2b-2 of the right jaw 2b (that is, the left jaw 2b) The pliers handle 21) of the head 2a and the right pliers 2b can move in the guide groove 100.

A hinge hole 25 is formed in the middle of the handle 21 of the forceps (ie, the waist of the forceps). Preferably, the hinge hole 25 is a stepped hole composed of two circular holes with different inner diameters; wherein, the inner diameter of the circular hole close to the inner side of the pliers head is larger than that of the circular hole close to the outer side, which is convenient for riveting. The first connecting portion 30 of the first connecting piece 3a passes through the hinge hole of the left pliers head 2a and then hinges the left pliers head 2a on the inner side of the front end of the left bracket 12a, so that the pliers handle of the left pliers head 2a is rotatably connected to the left pliers head 2a. On the left bracket 12a; after the rivet 3b passes through the hinge hole of the right pliers head 2b, the pliers head handle of the right pliers head 2b is hinged on the inner side of the front end of the right bracket 12b, so that the pliers head handle of the right pliers head 2b is rotatably connected to the on the right bracket 12b.

A hinge hole 27 is formed at the rear end of the pliers handle 21 (ie at the bent handle position 26 ). In the above-mentioned pliers head assembly, the two connecting rods and the two pliers heads are alternately connected on both sides of the arched platform 10 . The left clamp head 2a is hinged with the front end of the right link 4b through the hinge hole 27 at the rear end; the right clamp head 2b is hinged with the front end of the left link 4a through the hinge hole 27 at the rear end. The left clamp head 2a, the right clamp head 2b, the left connecting rod 4a and the right connecting rod 4b form a four-bar linkage mechanism. The opening and closing of the front ends of the left clamp head 2a and the right clamp head 2b are driven by a four-bar linkage mechanism. The connection state of the left clamp head 2a and the right connecting rod 4b is shown in FIG. 4 , and the connection state of the right clamp head 2b and the left connecting rod 4a is shown in FIG. 4 .

The structures of the left link 4a and the right link 4b are shown in FIG. 14 . The structures of the left link 4a and the right link 4b are the same, and the structures of the two links are described in detail below by taking a single link as an example. The left link 4a and the right link 4b respectively include a rod body 41, a stepped boss 42 is formed at the front end of the rod body 41 for connecting with the hinge hole 27 at the rear end of the pliers head, and a hinge hole is provided at the rear end of the rod body 41 43, used to be hinged with the pull rod 5.

The rear end of the rod body 41 of the left link 4a enters the inside of the circular tube 11 from the gap 101 on the left side of the arched platform 10; the rear end of the rod body 41 of the right link 4b enters the circular tube 11 from the gap 102 on the right side of the arched platform 10 internal. The thickness t of the rod bodies 41 of the left link 4a and the right link 4b is equal to or slightly smaller than the width d of the gaps on both sides of the arched platform 10 . By matching the thickness of the two connecting rods with the size of the gap on both sides of the arched platform, the left bracket 12a, right bracket 12b, left clamp head 2a, right clamp head 2b, left link 4a, right link 4b , and the arched platform 10 are squeezed together, which can also enhance the stability of the clamp head frame 1, reduce the shaking of the left clamp head 2a and the right clamp head 2b, and facilitate continuous sampling operations.

As shown in FIG. 5A , the rear ends of the left link 4 a and the right link 4 b are hinged to the top end of the pull rod 5 through the guide rivet 6 . The structure of the pull rod 5 is shown in FIG. 15 , the pull rod 5 includes a cylindrical rod body 51 , and an annular end portion 52 is provided at the front end of the rod body 51 . The hinge hole 43 at the rear end of the left link 4a and the right link 4b and the annular end 52 at the front end of the pull rod 5 are hinged through the guide rivet 6 .

As shown in FIGS. 5B , 6 to 8B , the arched platform 10 includes a horizontal portion 15 , an inclined portion 17 and a vertical portion 14 . The two vertical portions 14 respectively extend upward and forward from the front end of the circular tube 11 . One end of the inclined portion 17 is connected to the front end of the vertical portion 14 and the other end is connected to one end of the horizontal portion 15 , so that the inclined portion 17 bridges the opposite sides of the circular tube 11 like a bridge.

As shown in FIGS. 8A and 8B , below the arched platform 10, the interior surrounded by the arched platform 10 and the circular tube 11 forms an interior for the left link 4a, the right link 4b and the pull rod 5 to move up and down Space 103; the height of the arched platform 10 is determined according to the maximum stroke that the left connecting rod 4a, the right connecting rod 4b and the pull rod 5 need to be pushed forward when the left plier head 2a and the right plier head 2b are opened to the maximum, to ensure that no occurrence of put one's oar in. The left bracket 12a and the right bracket 12b have a bottom area 20 that coincides with the inner space 103 of the arched platform 10, and the inner diameter of the bottom area 20 is larger than the front end of the left bracket 12a (ie, the upper end in FIG. 8A, the end close to the jaw 22) and the right The distance between the front ends of the brackets 12b (ie, the upper end in FIG. 8A, the end close to the jaw 22). In other words, the left bracket 12a and the right bracket 12b form grooves in the bottom region 20 . The inner diameter of the round tube 10 and the inner diameter of the bottom region 20 are equal.

The state in which the tie rod 5 drives the rear ends of the left link 4a and the right link 4b to move up and down in the inner space 103 formed between the arched platform 10 and the round tube 11 is shown in FIGS. 3 , 5A and 5B . 3 shows the uppermost position that the rear ends of the left link 4a and the right link 4b can reach, at this position, the left clamp head 2a and the right clamp head 2b are in the maximum open state. 5A and 5B show the lowermost position to which the rear ends of the left and right links 4a and 4b can be pulled by the pull rod 5, in which position the left and right pliers 2a and 2b are in a closed state.

As shown in FIG. 3 , FIG. 5A and FIG. 5B , a connecting pipe 9 is connected to the rear end of the pull rod 5 . The rear end of the pull rod 5 is inserted into the connecting pipe 9 to be fixed. The rear end of the connecting pipe 9 is connected to the cable. By inserting the cable into the hole at the rear end of the connecting pipe 9 and fixing it, the connection between the connecting pipe 9 and the cable is realized.

As shown in FIGS. 1 to 5B , a sleeve 8 is connected to the lower part of the forceps head frame 1 . As shown in FIG. 6 , a stepped engaging portion 18 is formed on the outside of the lower end of the round tube 11 of the forceps head frame 1 . Connection.

As shown in Figures 16 and 17, blind holes are formed at both ends of the sleeve 8, and a blocking portion 81 is formed in the middle, and two cavities 82 and 83 are formed on both sides of the blocking portion 81. The cavity at the rear end of the sleeve 8 The inner diameter of 83 is smaller than the inner diameter of the cavity 82 at the front end of the sleeve 8 . A through hole 84 for limiting is provided in the center of the blocking portion 81, and the tie rod 5 and the connecting pipe 9 pass through the through hole 84 for limiting, so as to limit the up and down movement of the tie rod 5 and ensure that the two connecting rods and the The stability of the movement of the two jaws. The annular end portion 51 of the tie rod 5 and the rear ends of the left and right links 4 a and 4 b can move up and down in the cavity 82 in front of the blocking portion 81 and the inner space of the arched platform 10 .

The rear end of the sleeve 8 is connected with the spring tube, the cable extends from the spring tube to the control handle, and the rear end of the spring tube is fixed on the control handle. In the above-mentioned continuous sampling biopsy forceps, one end of the cable is connected to the pull rod 5 through the connecting tube 9, the other end is connected to the control handle, one end of the spring tube is connected to the sleeve 8, and the other end is connected to the control handle. Push and pull the control handle to drive the pull cable, the pull cable drives the pull rod and the four-bar linkage mechanism, and the four-bar linkage mechanism drives the two symmetrically arranged plier heads 2a and 2b in the plier head assembly to open and close, thereby continuously cutting multiple times. sample.

As shown in FIGS. 6 and 7 , a mounting hole 16 is formed in the middle portion of the arched platform 10 (ie, the middle portion of the horizontal portion 15 ) for arranging the sampling needle 7 . The mounting holes 16 may be through holes or blind holes. The bottom of the sampling needle 7 can be fixedly connected with the mounting hole 16 . The bottom of the sampling needle 7 can also pass through the mounting hole 16 in the center of the arched platform 10 and be fixed to the bottom of the arched platform 10 .

The sampling needle 7 is arranged on the arched platform 10 and extends into the guide groove 100 of the forceps head frame 1; the front end of the sampling needle 7 passes through the through hole 32 of the support part 31 and extends to the left forceps head 2a and the right forceps Between the jaws at the front end of the head 2b.

The structure of the sampling needle 7 used in the continuous sampling biopsy forceps is shown in FIG. 18 , the sampling needle 7 includes a cylindrical needle body 71 , a conical cylindrical needle tip 72 is formed at the front end of the needle body 71 , and the needle tip is The front end of 72 is flattened to form an arrow-shaped protrusion 73 protruding outward, which is beneficial to prevent the sample from slipping off. The above sampling needle uses a conical cylindrical needle tip, the needle body is relatively thin and has a certain rigidity, which can easily penetrate the sample, and the arrow-shaped needle tip can effectively prevent the sample from slipping off. Compared with the steel sheet needle used in the traditional needle biopsy forceps, the cylindrical needle sample needle is more conducive to the sliding and arrangement of multiple samples on the needle body 71 .

The sampling needle 7 is used to locate the lesion and obtain samples. When the continuous sampling biopsy forceps is sent into the body for sampling, the sampling needle 7 can be inserted into the sampling site for positioning first, and then the two forceps heads 2a and 2b are closed to extract the samples, and the extracted samples will be stored in the on the needle body of the sampling needle 7. Then, move the continuous sampling biopsy forceps to the next target position, insert the sampling needle 7 into the next sampling site again for positioning, and then close the two forceps heads 2a and 2b to extract the sample. In the process of continuous sampling, the samples taken each time will push the previously taken samples to the rear end of the needle body 71 , so that the multiple samples obtained by continuous sampling will be taken from the sampling needle 7 in the order of taking. The rear end is arranged in sequence from the front end, and the protrusion 73 provided at the front end of the needle tip can prevent the sample that has been picked from falling off the needle body 71, thereby ensuring that samples obtained by multiple sampling can be finally obtained and the quality of sampling is guaranteed.

In the continuous sampling biopsy forceps, since the support portion 31 is spaced between the forceps head handles 21a and 21b of the two forceps heads 2a and 2b, the upper portion of the support portion 31 is between the forceps head handles and between the jaws of the two forceps heads 2a and 2b. A space for accommodating more samples is formed, and the samples cut continuously for multiple times can be stored in the part of the sampling needle 7 located above the support part 31 . Combined with the overall size design of the existing biopsy forceps, the length of the part of the sampling needle located above the support portion 31 can ensure that 3 to 4 samples can be stored, so that the same lesion and the same biopsy can be completed in a short time with only one operation of advancing and withdrawing the forceps. continuous sampling.

Referring to FIG. 19 , in the second embodiment provided by the present invention, the supporting mechanism 3 includes two symmetrical supporting parts 3a-1 and 3a-2.

The first support member 3 a - 1 shown on the left side in FIG. 19 includes a left connecting portion 30 a , a left supporting portion 31 a , a left semi-cylindrical through hole 32 a , and a first matching portion 38 and a second matching portion 39 . Wherein, the left connecting portion 30a is arranged on the left side of the left support portion 31a, the right side of the left support portion 31a is vertically provided with a concave left semicircular through hole 32a, and the left support portion 31a faces the second support member 3a- The end face of the 2 is provided with a first matching portion 38 and a second matching portion 39 .

As shown in the second support member 3a-2 shown on the right side in FIG. The right connecting portion 30b is disposed on the right side of the right supporting portion 31b, the left side of the right supporting portion 31b is vertically provided with a concave right semicircular through hole 32b, and the right supporting portion 31b faces the first supporting member 3a- The end face of the 1 is provided with a first matching portion 38 and a second matching portion 39 .

The first matching part 38 and the second matching part 39 provided on the two supporting parts 31a and 31b can be engaged with each other, so that the two supporting parts 3a-1 and 3a-2 are fixed together, the left supporting part 31a and The right support portion 31 b constitutes the support portion 31 in the first embodiment, and at the same time, the two semi-cylindrical through holes 32 a and 32 b form a complete through hole 32 .

The left connecting portion 30a provided in the first support member 3a-1 corresponds to the first connecting portion 30 in the first embodiment, and the right connecting portion 30b provided in the second support member 3a-2 corresponds to the first embodiment in the second connector 3b. The left connecting portion 30a of the first support member 3a-1 is used for connecting the left forceps head 2a, and the right connecting portion 30b of the second supporting member 3a-2 is used for connecting the right forceps head 2b. Therefore, the left clamp head 2a and the right clamp head 2b are fixed to the left bracket and the right bracket with the support portion 31 formed by splicing spaced apart.

The whole formed by splicing the left support portion 31a in the first support member 3a-1 and the right support portion 31b in the second support member 3a-2 corresponds to the support portion 31 in the first embodiment. A complete through hole 32 formed by the sampling needle 7 passing through the through hole 32a of the first support member 3a-1 and the through hole 32b of the second support member 3a-2 is provided between the left forceps head 2a and the right forceps head 2b.

20 and 21 , in the third embodiment provided by the present invention, the support mechanism 3 includes a first pivot member 34 , a second pivot member 34 ′ and a support member 35 . The first pivot member 34 and the second pivot member 34' may be rivets, connecting posts or similar components. As shown in FIG. 21 , the support member 35 includes a through hole 36 penetrating up and down, and two connecting holes 37 and 37 ′ perpendicular to the through hole 36 . The connecting hole 37 and the connecting hole 37 ′ are symmetrically arranged on both sides of the through hole 37 , the connection holes 37 and 37' may be through holes or blind holes. By connecting the first pivot member 34 and the second pivot member 34' with the connecting holes 37 on both sides of the support member 35, respectively, a support mechanism is formed.

The first pivot member 34 corresponds to the first connecting portion 30 in the first embodiment, the second pivot member 34 ′ corresponds to the second connecting member 3b in the first embodiment, and the support member 35 corresponds to the first embodiment The support part 31 in the . The first pivot member 34 is used for connecting the left forceps head 2a and the left bracket 12a, and the second pivot member 34' is used for connecting the right forceps head 2b and the right bracket 12b. The left forceps head 2a and the right forceps head 2b are fixed to the left bracket and the right bracket with the support 35 interposed therebetween. The sampling needle 7 passes through the through hole 36 provided in the center of the support member 35, so as to ensure the stability of the forceps head bracket.

To sum up, in the continuous sampling biopsy forceps provided by the present utility model, the handle of the left forceps head and the handle of the right forceps head are rotatably connected to both sides of the front end of the forceps head frame through the supporting mechanism, and the sampling needle passes through the forceps. Through the through hole in the middle of the support mechanism, the support mechanism can ensure the accurate position of the needle tip without shaking. The support mechanism enhances the stability of the clamp head frame, reduces the shaking of the left clamp head and the right clamp head, and facilitates continuous sampling operations. In the above structure, a support portion is provided in the middle of the support mechanism, and the middle portion of the support mechanism is spaced from the plier head handle of the left pliers head and the plier head handle of the right plier head, so that between the plier head handles of the two plier heads above the support mechanism A space for accommodating samples is formed between the jaws and the jaws, and the sample storage space is large, which is conducive to multiple continuous sampling.

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

Claims (15)

1. a continuous sampling biopsy forceps, is characterized in that comprising forceps head frame, left forceps head, right forceps head, support mechanism and sampling needle; The forceps head frame includes a base, a left support, and a right support, and the left support and the right support are oppositely arranged on two sides of the base; the support mechanism rotatably connects the left pliers head to the left bracket, and rotatably connects the right pliers head to the right bracket; The middle part of the support mechanism is provided with a through hole; the through hole accommodates the sampling needle; the middle part of the support mechanism is spaced apart from the clamp head handle of the left clamp head and the clamp head handle of the right clamp head, the The sampling needle is located above the support mechanism, and the part between the forceps handle of the left forceps head and the forceps handle of the right forceps head forms a sample storage space. 2. continuous sampling biopsy forceps as claimed in claim 1 is characterized in that: The supporting mechanism includes a first connecting piece and a second connecting piece, wherein the first connecting piece includes a first connecting part and a supporting part; the first connecting part extends from the side of the supporting part facing the left bracket ; the first connecting part is used to hinge the pliers handle of the left pliers to the left bracket; the side of the supporting part away from the first connecting part is provided with a connection perpendicular to the through hole hole; The second connecting piece is used for hingedly connecting the plier head handle of the right pliers head to the right bracket, and one end of the second connecting piece penetrates into the connecting hole, The through hole is provided in the support portion. 3. continuous sampling biopsy forceps as claimed in claim 1 is characterized in that: The support mechanism includes a symmetrical first support member and a second support member; the first supporting part includes a left connecting part, a left supporting part, a left semi-cylindrical through hole, a first matching part and a second matching part; the second supporting part includes a right connecting part, a right supporting part, a right semi-cylindrical through hole, a first matching part and a second matching part; The left connecting part is used for hingedly connecting the plier head handle of the left plier head to the left bracket; the right connecting part is used for hingedly connecting the plier head handle of the right plier head to the right bracket; Through the connection of the first matching part and the second matching part, the left support part and the right support part form a support part, and the left semi-cylindrical through hole and the right semi-cylindrical through hole form a support part. the through hole. 4. continuous sampling biopsy forceps as claimed in claim 1 is characterized in that: The support mechanism includes a first pivot piece, a second pivot piece and a support piece; connecting holes are respectively opened on both sides of the support piece, and the first pivot piece and the second pivot piece are respectively connected to both sides of the support through connecting holes; The first pivot piece is used to hinge the plier head handle of the left plier head to the left bracket; the second pivot piece is used to hinge the plier head handle of the right plier head to the right bracket; The through hole is provided on the support. 5. continuous sampling biopsy forceps as claimed in claim 1 is characterized in that: The forceps head frame further includes an arched platform extending from the front end of the base to between the left bracket and the right bracket; The sampling needle is arranged on the arched platform, the sampling needle passes through the through hole, and the front end of the sampling needle extends to the jaws of the left forceps head and the right forceps between the jaws of the head. 6. The continuous sampling biopsy forceps as claimed in claim 5, further comprising a left connecting rod and a right connecting rod; The rear end of the left clamp head is hinged with the front end of the right connecting rod, and the rear end of the right connecting rod enters the inside of the base from the gap on the right side of the arched platform in the clamp head frame; The rear end of the forceps head is hinged with the front end of the left connecting rod, and the rear end of the left connecting rod enters the interior of the base from the gap on the left side of the arched platform in the forceps head frame. 7. continuous sampling biopsy forceps as claimed in claim 6 is characterized in that: The thicknesses of the left link and the right link are respectively equal to or slightly smaller than the width of the gaps on both sides of the arched platform. 8. The continuous sampling biopsy forceps as claimed in claim 6, characterized in that it comprises a pull rod, The rear ends of the left link and the right link are hinged with the top end of the pull rod through guide rivets. 9. continuous sampling biopsy forceps as claimed in claim 8 is characterized in that: The rear end of the tie rod is connected with a connecting pipe. 10. continuous sampling biopsy forceps as claimed in claim 9, is characterized in that: A sleeve is connected to the lower part of the forceps head frame, blind holes are formed at both ends of the sleeve, a blocking part is formed in the middle part, and a through hole for position limit is provided in the center of the blocking part; The tie rod and the connecting pipe pass through the through hole for positioning. 11. continuous sampling biopsy forceps as claimed in claim 6 is characterized in that: The left link and the right link respectively comprise a rod body, a stepped boss is formed at the front end of the rod body, and a hinge hole is provided at the rear end of the rod body. 12. The continuous sampling biopsy forceps of claim 11, wherein: The pliers handle has an approximate zigzag shape, the front end of the pliers handle is connected with one side edge of the jaw, and the rear end forms a curved handle close to the center line of the jaw through an arc transition. 13. The continuous sampling biopsy forceps of claim 5, wherein: The arched platform includes a horizontal part, an inclined part and a vertical part; the two vertical parts respectively extend upward and forward from the front end of the base; one end of the inclined part is connected with the front end of the vertical part, and the The other end of the inclined portion is connected to one end of the horizontal portion. 14. The continuous sampling biopsy forceps of claim 8, wherein: Below the arched platform, an inner space for the left connecting rod, the right connecting rod and the tie rod to move up and down is formed; The left bracket and the right bracket have a bottom area that coincides with the inner space, and the inner diameter of the bottom area is greater than the distance between the front ends of the left bracket and the right bracket; The inner diameter of the abutment and the inner diameter of the base region are equal. 15. The continuous sampling biopsy forceps of claim 1, wherein: The sampling needle includes a cylindrical needle body, a conical cylindrical needle tip is formed at the front end of the needle body, and an arrow-shaped protrusion protruding outward is formed at the front end of the needle tip.

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