Continuous sampling biopsy forceps

Abstract

The present invention discloses a continuous sampling biopsy forceps, comprising a forceps head frame, a left forceps head, a right forceps head, a supporting mechanism and a sampling needle; the forceps head frame comprises a base, a left bracket, a right bracket and an arched platform; the supporting mechanism can rotatably connect the left forceps head to the left bracket, and can rotatably connect the right forceps head to the right bracket; a through hole is provided in the middle of the supporting mechanism for accommodating the sampling needle; the middle of the supporting mechanism is separated by the forceps head handle of the left forceps head and the forceps head handle of the right forceps head; the sampling needle is located above the supporting mechanism and between the forceps head handle of the left forceps head and the forceps head handle of the right forceps head to form a sample storage space. In the above structure, the supporting mechanism can ensure that the position of the sampling needle tip is accurate and will not shake, and at the same time, the supporting mechanism can enhance the stability of the forceps head frame, facilitating the continuous sampling operation.

Description

Technical Field

[0001] The invention relates to a continuous sampling biopsy forceps and belongs to the field of medical instruments. Background Art

[0002] Biopsy forceps is a tool used to bite and sample the lesion in the abdominal cavity of the human body, and is generally used in conjunction with an endoscope. During endoscopic examination, when a pathological examination of the lesion is required, the biopsy forceps is inserted into the patient's body through the endoscope forceps channel to clamp the tissue of the lesion. Sampling with biopsy forceps is less painful and less traumatic, so it is very popular among doctors and patients.

[0003] In the existing biopsy forceps head assembly, the two forceps heads are hinged to the forceps head frame by the same rivet. Limited by the small sample storage space in the forceps head assembly, the existing needle biopsy forceps and needleless biopsy forceps can only be used for one-time or small-scale sampling. In conventional endoscopic examinations, one lesion or one biopsy usually requires about 3 to 4 specimens to be taken. The use of the above-mentioned biopsy forceps requires the forceps to be advanced and retracted through the endoscope channel about 3 to 4 times, and the objective lens of the endoscope and the forceps head of the biopsy forceps must be adjusted after each advancement, which is time-consuming and labor-intensive. Furthermore, the wound surface of each inspection will begin to bleed a small amount within a few seconds after the inspection, and it will take 1 to 5 minutes to stop on its own. This small amount of bleeding will contaminate the lesion, affect the field of view, and reduce the accuracy of subsequent inspections. Therefore, if a biopsy forceps for continuous sampling can be produced, so that the sampling of the same lesion or the same biopsy can be quickly completed during one clamp operation, the difficulty of sampling operation will be reduced, the sampling time will be reduced, and thus the patient's pain will be reduced. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a continuous sampling biopsy forceps.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] According to an embodiment provided by the present invention, a continuous sampling biopsy forceps comprises a forceps head frame, a left forceps head, a right forceps head, a supporting mechanism and a sampling needle;

[0007] The clamp head frame comprises a base, a left bracket and a right bracket, wherein the left bracket and the right bracket are arranged on two sides of the base relatively;

[0008] The support mechanism rotatably connects the left clamp head to the left bracket, and rotatably connects the right clamp head to the right bracket;

[0009] A through hole is provided in the middle of the support mechanism; the through hole accommodates the sampling needle; the middle of the support mechanism separates the clamp handle of the left clamp head and the clamp handle of the right clamp head, and the sampling needle is located above the support mechanism and the part between the clamp handle of the left clamp head and the clamp handle of the right clamp head forms a sample storage space.

[0010] 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 extends from a side of the supporting portion facing the left bracket; the first connecting portion is used to hinge the pliers handle of the left pliers head to the left bracket; a connecting hole perpendicular to the through hole is provided on a side of the supporting portion away from the first connecting portion;

[0011] The second connecting member is used to hinge the pliers handle of the right pliers head to the right bracket, and one end of the second connecting member is inserted into the connecting hole.

[0012] The through hole is provided in the supporting portion.

[0013] According to an embodiment provided by the present invention, the support mechanism includes a symmetrical first support component and a second support component;

[0014] The first supporting component comprises a left connecting portion, a left supporting portion, a left semi-cylindrical through hole, a first matching portion and a second matching portion;

[0015] The second supporting component includes a right connecting portion, a right supporting portion, a right semi-cylindrical through hole, a first matching portion and a second matching portion;

[0016] The left connecting portion is used to hinge the pliers head handle of the left pliers head to the left bracket; the right connecting portion is used to hinge the pliers head handle of the right pliers head to the right bracket;

[0017] Through the connection of the first matching portion and the second matching portion, the left supporting portion and the right supporting portion constitute a supporting portion, and the left semi-cylindrical through hole and the right semi-cylindrical through hole constitute the through hole.

[0018] According to an embodiment provided by the present invention, the support mechanism includes a first pivot member, a second pivot member and a support member; connecting holes are respectively opened on both sides of the support member, and the first pivot member and the second pivot member are respectively connected to the two sides of the support member through the connecting holes;

[0019] The first pivoting member is used to hinge the pliers head handle of the left pliers head to the left bracket; the second pivoting member is used to hinge the pliers head handle of the right pliers head to the right bracket;

[0020] The through hole is arranged on the supporting member.

[0021] Preferably, the clamp head frame further comprises an arched platform, which extends from the front end of the base to between the left bracket and the right bracket;

[0022] The sampling needle is arranged on the arched platform, and passes through the through hole. Moreover, the front end of the sampling needle extends between the jaws of the left clamp head and the jaws of the right clamp head.

[0023] Preferably, the continuous sampling biopsy forceps further comprises a left connecting rod and a right connecting rod;

[0024] The rear end of the left pliers head is hinged to the front end of the right connecting rod, and the rear end of the right connecting rod enters the interior of the base from the gap on the right side of the arched platform in the pliers head frame; the rear end of the right pliers head is hinged to 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 pliers head frame.

[0025] Preferably, the thickness of the left connecting rod and the right connecting rod is respectively equal to or slightly smaller than the width of the gaps on both sides of the arched platform.

[0026] Preferably, the rear ends of the left connecting rod and the right connecting rod are hinged to the top end of the pull rod through guide rivets.

[0027] Preferably, the rear end of the pull rod is connected with a connecting pipe.

[0028] Preferably, a sleeve is connected to the lower part of the clamp head frame, blind holes are provided at both ends of the sleeve, a blocking portion is formed in the middle, and a through hole for limiting is provided in the center of the blocking portion;

[0029] The pull rod and the connecting pipe pass through the through hole for limiting.

[0030] Preferably, the sampling needle comprises a cylindrical needle body, a conical 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.

[0031] The continuous sampling biopsy forceps provided by the present invention have a forceps head handle of a left forceps head and a forceps head handle of a right forceps head that are rotatably connected to the two sides of the front end of the forceps head frame through a support mechanism, and a through hole that passes through the upper and lower parts is provided in the middle of the support mechanism, and the sampling needle passes through the through hole. The support mechanism can ensure that the position of the needle tip is accurate and does not shake. At the same time, it can enhance the stability of the forceps head frame, reduce the shaking of the left forceps head and the right forceps head, and facilitate the continuous sampling operation. In the above structure, the middle part of the support mechanism separates the forceps head handle of the left forceps head and the forceps head handle of the right forceps head, so that a space for accommodating samples is formed between the forceps head handles of the two forceps heads above the support mechanism and between the jaws, and the sample storage space is large, which is conducive to multiple continuous sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the open state of the continuous sampling biopsy forceps according to the first embodiment of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the top view of the continuous sampling biopsy forceps shown;

[0034] Figure 3 yes Figure 2 The OO cross-sectional structure schematic diagram of the continuous sampling biopsy forceps shown;

[0035] Figure 4 yes Figure 1 A schematic diagram of the closed state of the continuous sampling biopsy forceps shown;

[0036] Figure 5A yes Figure 4 A schematic diagram of a cross-sectional structure of a continuous sampling biopsy forceps from one viewing angle is shown;

[0037] Figure 5B yes Figure 4 A schematic cross-sectional view of the continuous sampling biopsy forceps from another viewing angle is shown;

[0038] Figure 6 It is a structural schematic diagram of the clamp head frame;

[0039] Figure 7 1. It is a schematic diagram of the top view of the clamp head frame;

[0040] Fig. 8A yes Figure 7 AA cross-sectional structural diagram of the clamp head frame shown;

[0041] Figure 8B yes Figure 7 BB cross-sectional structural diagram of the clamp head frame shown;

[0042] Fig. 9 It is a schematic diagram of the structure of the clamp head;

[0043] Fig.10 is a schematic structural diagram of a first connecting member in a supporting mechanism;

[0044] Fig.11 is a front view structural schematic diagram of the first connecting member;

[0045] Fig.12 is a schematic cross-sectional structural diagram of a first connecting member;

[0046] Fig.13 is a schematic structural diagram of a second connecting member in the supporting mechanism;

[0047] Fig.14 It is a structural diagram of the connecting rod;

[0048] Fig.15 It is a structural diagram of the pull rod;

[0049] Fig.16 It is a schematic diagram of the structure of the casing;

[0050] Fig.17 is a schematic diagram of the cross-sectional structure of the casing;

[0051] Fig.18 It is a schematic diagram of the structure of the sampling needle;

[0052] Fig.19 is a schematic structural diagram of the support mechanism in the second embodiment;

[0053] Fig. 20 is a schematic structural diagram of a support mechanism in a third embodiment;

[0054] Fig.21 yes Fig. 20 A schematic diagram of the cross-sectional structure of the support member in the support mechanism shown. DETAILED DESCRIPTION

[0055] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] For ease of understanding, the “upper”, “lower”, “left” and “right” in the following description of the present invention are directions in the accompanying drawings and do not constitute limitations to the present invention.

[0057] In the embodiment provided by the present invention, the continuous sampling biopsy forceps include: Figures 1 to 5BThe clamp head assembly shown also includes a cable, a spring tube and an operating handle (not shown) connected to the clamp head assembly. The clamp head assembly includes a clamp head frame 1, a left clamp head 2a, a right clamp 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. Among them, the clamp head frame 1 includes a base 11, a left bracket 12a, and a right bracket 12b, and the left bracket 12a and the right bracket 12b are relatively arranged on both sides of the base 11; the supporting mechanism 3 can rotatably connect the left clamp head 2a to the left bracket 12a, and can rotatably connect the right clamp head 2b to the right bracket 12b; a through hole 32 is provided in the middle of the supporting mechanism 3; the through hole 32 accommodates the sampling needle 7; the middle part of the supporting mechanism 3 separates the clamp head handle 21a of the left clamp head 2a and the clamp head handle 21b of the right clamp head 2b, and the sampling needle 7 is located above the supporting mechanism 3 and between the clamp head handle 21a of the left clamp head 2a and the clamp head handle 21b of the right clamp head 2b to form a sample storage space.

[0058] In the first embodiment provided by the present invention, the support mechanism 3 includes a first connecting member 3a and a second connecting member 3b. For ease of understanding, the following description takes the rivet 3b as an example to represent the second connecting member. Similarly, the second connecting member may also be a connecting column or other connecting member that realizes a pivoting function.

[0059] Among them, Figure 6 , Figure 7 , Fig. 8A and Figure 8B As shown, the clamp head frame 1 includes a base 11 (such as 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.

[0060] Preferably, the base 11 can be implemented by a round tube to facilitate the movement and rotation of the continuous sampling biopsy forceps inside the human body. The following description takes the round tube 11 as an example.

[0061] The left bracket 12a and the right bracket 12b extend forward from the front end of the circular tube 11 respectively. The "front" in the present application refers to the front from the perspective of the operator when the operator holds the biopsy forceps. The left bracket 12a and the right bracket 12b are relatively arranged on both 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.

[0062] 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 is formed between the arched platform 10 and the left bracket 12a for the left connecting rod 4a to pass through; and a gap 102 is formed between the arched platform 10 and the right bracket 12b for the right connecting rod 4b to pass through.

[0063] The structure of the first connecting member 3a is as follows Figures 10 to 12 As shown. The first connecting member 3a includes a first connecting portion 30 and a supporting portion 31. The first connecting portion 30 extends from the side of the supporting portion 31 facing the left bracket 12a. The supporting portion 31 is located in the middle of the supporting mechanism 3, and the middle of the supporting portion 31 has a through hole 32 and a connecting hole 33. The through hole 32 is through from top to bottom and is used to accommodate the sampling needle 7. The connecting hole 33 is arranged on the side of the supporting portion 31 away from the first connecting portion 30, and the connecting hole 33 is perpendicular to the through hole 32. The connecting hole 33 can be a through hole communicating with the through hole 32, or it can be a blind hole that is not communicating with the through hole 32.

[0064] like Figure 2 As shown, the first connecting portion 30 is used to connect the pliers head handle 21a (in Fig. 9 The pliers handle 21 in the figure is hinged to the inner side of the front end of the left bracket 12a (as shown in FIG. Figure 4 As shown, that is, the side opposite to the left bracket 12a and the right bracket 12b). Fig.13 The rivet 3b shown is used to fix the pliers head handle 21b (in the right pliers head 2b) Fig. 9 The pliers handle 21 in the figure is hinged to the inner side of the front end of the right bracket 12b (as shown in FIG. Figure 4 As shown, that is, the side opposite to the right bracket 12b and the left bracket 12a). In addition, one end of the rivet 3b penetrates into the connecting hole 33 to realize the connection between the first connecting member 3a and the rivet 3b (i.e., the second connecting member), and the first connecting member 3a and the second connecting member 3b constitute the supporting mechanism 3. The supporting portion 31 arranged in the middle of the supporting mechanism 3 is used to space the pliers handles 21a and 21b of the left pliers head 2a and the right pliers head 2b.

[0065] Connecting holes 13a and 13b are provided at the front ends of the left bracket 12a and the right bracket 12b, respectively. Figure 5A As shown, the first connecting portion 30 passes through the hinge hole 25a ( Fig. 9 The rivet 3b passes through the hinge hole 25b (shown as 25) and the connection hole 13a set at the front end of the left bracket 12a, so that the pliers handle 21a of the left pliers head 2a is hinged to the inner side of the front end of the left bracket 12a, and the first connecting part 30 is fixed to the left bracket 12a. The rivet 3b passes through the hinge hole 25b ( Fig. 9Shown as 25) and the connecting hole 13b arranged at the front end of the right bracket 12b, the clamp handle 21b of the right clamp head 2b is hinged to the inner side of the front end of the right bracket 12b, and one end of the rivet 3b close to the support part 31 is inserted into the connecting hole 33, and the other end of the rivet 3b is fixed to the right bracket 12b.

[0066] In the continuous sampling biopsy forceps, the left clamp head 2a and the right clamp head 2b are respectively hinged on both sides of the front end of the clamp head frame through the first connecting part 30 and the rivet 3b (i.e., the second connecting member). Among them, the first connecting part 30 is arranged on the left side of the support part 31, and the rivet 3b is connected to the right side of the support part 31, so that the first connecting part 30 is separated from the rivet 3b. The left clamp head 2a and the right clamp head 2b are respectively installed on the first connecting part 30 and the rivet 3b, so that by making the external dimensions of the support part 31 larger than the external dimensions of the first connecting part 30 and the rivet 3b, and making the width dimension between the clamp head handle 21a of the left clamp head 2a and the clamp head handle 21b of the right clamp head 2b match the dimension of the support part 31, so that the support part 31 is spaced between the clamp head handle of the left clamp head 2a and the clamp head handle of the right clamp head 2b, so that a sample storage space is formed between the clamp head handles of the clamp head 2a and the clamp head 2b and between the jaws for accommodating the sample to be sampled. In the above structure, the sample that has been sampled can fall between the two clamp handles 21a and 21b above the support portion 31. Therefore, the sample storage space is large, which is also conducive to multiple continuous sampling. At the same time, since the first connecting member 3a and the rivet 3b fix the left bracket 12a and the right bracket 12b of the clamp head frame 1 together, the stability of the clamp head frame 1 is enhanced, the shaking of the left clamp head 2a and the right clamp head 2b is reduced, and the continuous sampling operation is convenient. Preferably, the thickness of the clamp handle of the left clamp head 2a is close to the distance between the support portion 31 and the left bracket 12a; the thickness of the clamp handle of the right clamp head 2b is close to the distance between the support portion 31 and the right bracket 12b, which can further reduce the shaking and misalignment of the left clamp head 2a and the right clamp head 2b.

[0067] The structures of the left clamp head 2a and the right clamp head 2b used in the continuous sampling biopsy forceps are basically the same. Fig. 9 The structure of the two pliers heads is described in detail by taking the single pliers head shown as an example.

[0068] The pliers head includes a jaw 22 at the front and a pliers head handle 21 at the rear. The jaw 22 includes a smooth arc-shaped shell, a jaw cavity is formed inside the arc-shaped shell, a through hole 23 is provided in the center of the jaw cavity, and a cutting edge 24 is provided at the edge of the jaw cavity. The cutting edges 24 of the two pliers heads are both provided on the outside of the pliers heads. When the two pliers heads 2a and 2b are closed, the two cutting edges 24 are aligned and matched, and a shearing surface is formed at the closed position of the two pliers heads.

[0069] The pliers head handle 21 is a connection portion approximately in a Z shape, the front end of the pliers head handle 21 is connected to a side edge of the jaws 22, and the rear end is formed into a curved handle 26 close to the center line of the jaws through an arc transition.

[0070] The left pliers 2a and the right pliers 2b are hinged on the inner sides of the front ends of the left bracket 12a and the right bracket 12b respectively through the first connecting member 3a and the second connecting member 3b, and the front end 2a-1 of the left pliers 2a and the front end 2b-1 of the right pliers 2b (i.e., the jaws 22 of the left pliers 2a and the right pliers 2b) perform opening and closing actions, and the rear end 2a-2 of the left pliers 2a and the rear end 2b-2 of the right pliers 2b (i.e., the pliers handles 21 of the left pliers 2a and the right pliers 2b) can move in the guide groove 100.

[0071] A hinge hole 25 is formed in the middle of the pliers head handle 21 (i.e., the waist of the pliers head). 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 the inner diameter of the circular hole close to the outer side, so as to facilitate riveting. After the first connecting portion 30 of the first connecting member 3a passes through the hinge hole of the left pliers head 2a, the left pliers head 2a is hinged to the inner side of the front end of the left bracket 12a, so that the pliers head handle of the left pliers head 2a can be rotatably connected to 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 to the inner side of the front end of the right bracket 12b, so that the pliers head handle of the right pliers head 2b can be rotatably connected to the right bracket 12b.

[0072] A hinge hole 27 is formed at the rear end of the pliers handle 21 (i.e., at the bent handle position 26). In the above-mentioned pliers assembly, two connecting rods and two pliers are staggered and connected on both sides of the arched platform 10. The left pliers 2a is hinged to the front end of the right connecting rod 4b through the hinge hole 27 at its rear end; the right pliers 2b is hinged to the front end of the left connecting rod 4a through the hinge hole 27 at its rear end. The left pliers 2a, the right pliers 2b, the left connecting rod 4a and the right connecting rod 4b form a four-bar linkage. The four-bar linkage drives the front ends of the left pliers 2a and the right pliers 2b to open and close. See the connection state of the left pliers 2a and the right connecting rod 4b for details. Figure 4 The connection state of the right clamp head 2b and the left connecting rod 4a is shown in Figure 4 .

[0073] The structures of the left connecting rod 4a and the right connecting rod 4b are as follows: Fig.14 As shown. The left connecting rod 4a and the right connecting rod 4b have the same structure. The structure of the two connecting rods is described in detail below by taking a single connecting rod as an example. The left connecting rod 4a and the right connecting rod 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 43 is provided at the rear end of the rod body 41 for hinge connection with the pull rod 5.

[0074] The rear end of the rod body 41 of the left connecting rod 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 connecting rod 4b enters the inside of the circular tube 11 from the gap 102 on the right side of the arched platform 10. The thickness t of the rod body 41 of the left connecting rod 4a and the right connecting rod 4b is equal to or slightly less 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 gaps on both sides of the arched platform, the left bracket 12a, the right bracket 12b, the left clamp head 2a, the right clamp head 2b, the left connecting rod 4a, the right connecting rod 4b, and the arched platform 10 can be mutually squeezed and matched, 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.

[0075] like Figure 5A As shown, the rear ends of the left connecting rod 4a and the right connecting rod 4b are hinged to the top end of the pull rod 5 through the guide rivet 6. The structure of the pull rod 5 is as follows Fig.15 As shown, the pull rod 5 includes a cylindrical rod body 51, and a ring end 52 is provided at the front end of the rod body 51. The hinge holes 43 at the rear ends of the left connecting rod 4a and the right connecting rod 4b and the ring end 52 at the front end of the pull rod 5 are hinged through a guide rivet 6.

[0076] like Figure 5B , Figures 6 to 8B As shown, the arched platform 10 includes a horizontal portion 15, an inclined portion 17 and a vertical portion 14. The two vertical portions 14 extend upward and forward from the front end of the round 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. Therefore, the inclined portion 17 spans the opposite sides of the round tube 11 like a bridge.

[0077] like Fig. 8A and 8B As shown, below the arched platform 10, in the interior formed between the arched platform 10 and the round tube 11, an internal space 103 is formed for the left connecting rod 4a, the right connecting rod 4b and the pull rod 5 to move up and down; 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 push forward when the left clamp head 2a and the right clamp head 2b are opened to the maximum, to ensure that there is no interference. The left bracket 12a and the right bracket 12b have a bottom area 20 that overlaps with the internal 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 (i.e. Fig. 8A The upper end of the right bracket 12b, the end close to the jaw 22) and the front end of the right bracket 12b (i.e. Fig. 8A In other words, the left bracket 12a and the right bracket 12b form a groove in the bottom area 20. The inner diameter of the round tube 10 is equal to the inner diameter of the bottom area 20.

[0078] The state in which the pull rod 5 drives the rear ends of the left connecting rod 4a and the right connecting rod 4b to move up and down in the internal space 103 formed between the arched platform 10 and the round tube 11 is shown in FIG. Figure 3 , Figure 5A and Figure 5B Among them, Figure 3 The figure shows the uppermost position that the rear ends of the left connecting rod 4a and the right connecting rod 4b can reach. In this position, the left clamp head 2a and the right clamp head 2b are in the most open state. Figure 5A and 5B FIG. 5 shows the lowest position to which the rear ends of the left connecting rod 4a and the right connecting rod 4b can be pulled by the pull rod 5. In this position, the left clamp head 2a and the right clamp head 2b are in a closed state.

[0079] like Figure 3 , Figure 5A and Figure 5B As shown, the rear end of the pull rod 5 is connected with a connecting pipe 9. The rear end of the pull rod 5 is inserted into the connecting pipe 9 and fixed. The rear end of the connecting pipe 9 is connected to the cable. The connection between the connecting pipe 9 and the cable is achieved by inserting the cable into the hole at the rear end of the connecting pipe 9 and fixing it.

[0080] like Figures 1 to 5B As shown, a sleeve 8 is connected to the lower part of the clamp head frame 1. Figure 6 As shown, a stepped engaging portion 18 is formed outside the lower end of the round tube 11 of the clamp head frame 1, and the lower end of the round tube 11 is inserted into the upper end of the sleeve 8 and then engaged to achieve connection between the two.

[0081] like Fig.16 and 17 As shown, blind holes are provided 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 inner diameter of the cavity 83 at the rear end of the sleeve 8 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 pull rod 5 and the connecting pipe 9 pass through the through hole 84 for limiting, thereby limiting the up and down movement of the pull rod 5 and ensuring the stability of the movement of the two connecting rods and the two clamp heads. The annular end 51 of the pull rod 5 and the rear ends of the left connecting rod 4a and the right connecting rod 4b can move up and down in the cavity 82 in front of the blocking portion 81 and the internal space of the arched platform 10.

[0082] The rear end of the sleeve 8 is connected to the spring tube, and 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, and 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. Pushing and pulling the control handle drives the cable, and the cable drives the pull rod and the four-bar linkage to move. The four-bar linkage drives the two symmetrically arranged clamp heads 2a and 2b in the clamp head assembly to open and close, thereby continuously cutting samples multiple times.

[0083] like Figure 6 and Figure 7 As shown, a mounting hole 16 is formed in the middle of the arched platform 10 (i.e., the middle of the horizontal portion 15) for arranging the sampling needle 7. The mounting hole 16 may be a through hole or a blind hole. The bottom of the sampling needle 7 may be fixedly connected to the mounting hole 16. The bottom of the sampling needle 7 may also pass through the mounting hole 16 at the center of the arched platform 10 and be fixed to the bottom of the arched platform 10, for example, the bottom of the sampling needle 7 may be fixed to the bottom of the arched platform 10 by laser welding.

[0084] The sampling needle 7 is arranged on the arched platform 10 and extends into the guide groove 100 of the clamp head frame 1; the front end of the sampling needle 7 passes through the through hole 32 of the support portion 31 and extends between the jaws of the front ends of the left clamp head 2a and the right clamp head 2b.

[0085] The structure of the sampling needle 7 used in the continuous sampling biopsy forceps is as follows: Fig.18 As shown, the sampling needle 7 includes a cylindrical needle body 71, a conical needle tip 72 is formed at the front end of the needle body 71, and the front end of the needle tip 72 is flattened to form an arrow-shaped protrusion 73 protruding outward, which is helpful to prevent the sample from slipping. The above-mentioned sampling needle uses a conical needle tip, the needle body is relatively sharp and has a certain rigidity, and can be easily penetrated into the sample. The arrow-shaped needle tip can effectively prevent the sample from slipping. Compared with the steel needle used in 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.

[0086] The sampling needle 7 is used for lesion positioning and sample acquisition. When the continuous sampling biopsy forceps is sent into the body for sampling, the sampling needle 7 can be inserted into the inspection site for positioning, and then the two clamp heads 2a and 2b are closed to remove the sample, and the removed sample will be stored on the needle body of the sampling needle 7. Then, the continuous sampling biopsy forceps is moved to the next target position, and the sampling needle 7 is inserted into the next inspection site again for positioning, and then the two clamp heads 2a and 2b are closed to remove the sample. In the process of continuous sampling, each sample removed will push the previously removed sample toward the rear end of the needle body 71, so that the multiple samples obtained by continuous sampling are arranged in sequence from the rear end to the front end on the sampling needle 7 in the order of removal, and the protrusion 73 set at the front end of the needle tip can prevent the already removed sample from falling off the needle body 71, thereby ensuring that the samples obtained by multiple samplings can be finally obtained, and the quality of sampling is guaranteed.

[0087] In the continuous sampling biopsy forceps, since the support part 31 separates the forceps handles 21a and 21b of the two forceps heads 2a and 2b, a space that can accommodate more samples is formed between the forceps handles and between the jaws of the two forceps heads 2a and 2b above the support part 31, and the samples cut continuously for multiple times can be stored in the part where the sampling needle 7 is located above the support part 31. Combined with the overall size design of the existing biopsy forceps, the length of the part where the sampling needle is located above the support part 31 can ensure the storage of 3 to 4 samples, so that continuous sampling of the same lesion and the same biopsy can be completed in a short time with only one operation of advancing and retracting the forceps.

[0088] refer 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.

[0089] like Fig.19 The first supporting component 3a-1 shown on the left side of the figure comprises a left connecting portion 30a, a left supporting portion 31a, a left semi-cylindrical through hole 32a, a first matching portion 38 and a second matching portion 39. The left connecting portion 30a is arranged on the left side of the left supporting portion 31a, a concave left semi-circular through hole 32a is vertically arranged on the right side of the left supporting portion 31a, and a first matching portion 38 and a second matching portion 39 are arranged on the end surface of the left supporting portion 31a facing the second supporting component 3a-2.

[0090] like Fig.19 As shown in the second supporting component 3a-2 shown on the right side of the middle, it includes a right connecting portion 30b, a right supporting portion 31b, a right semi-cylindrical through hole 32b, a first matching portion 38, and a second matching portion 39. The right connecting portion 30b is arranged on the right side of the right supporting portion 31b, a right semi-circular through hole 32b with an inward concave shape is vertically arranged on the left side of the right supporting portion 31b, and a first matching portion 38 and a second matching portion 39 are arranged on the end surface of the right supporting portion 31b facing the first supporting component 3a-1.

[0091] The first matching portion 38 and the second matching portion 39 arranged on the two supporting portions 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 portion 31a and the right supporting portion 31b constitute the supporting portion 31 in the first embodiment. At the same time, the two semi-cylindrical through holes 32a and 32b are assembled into a complete through hole 32.

[0092] The left connecting portion 30a provided in the first supporting member 3a-1 is equivalent to the first connecting portion 30 in the first embodiment, and the right connecting portion 30b provided in the second supporting member 3a-2 is equivalent to the second connecting member 3b in the first embodiment. The left connecting portion 30a of the first supporting member 3a-1 is used to connect the left clamp head 2a, and the right connecting portion 30b of the second supporting member 3a-2 is used to connect the right clamp head 2b. Therefore, the supporting portion 31 formed by splicing the left clamp head 2a and the right clamp head 2b with an interval is fixed to the left bracket and the right bracket.

[0093] The whole formed by the left supporting part 31a in the first supporting part 3a-1 and the right supporting part 31b in the second supporting part 3a-2 is equivalent to the supporting part 31 in the first embodiment. The sampling needle 7 passes through the complete through hole 32a of the first supporting part 3a-1 and the through hole 32b of the second supporting part 3a-2, which is set between the left clamp head 2a and the right clamp head 2b.

[0094] refer to Fig. 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' can be rivets, connecting columns or similar components. Fig.21 As shown, the support member 35 includes a through hole 36 extending vertically therethrough, and two connecting holes 37 and 37' perpendicular to the through hole 36. The connecting holes 37 and 37' are symmetrically arranged on both sides of the through hole 37. The connecting holes 37 and 37' can be through holes or blind holes. The support mechanism is formed by connecting the first pivot member 34 and the second pivot member 34' to the connecting holes 37 on both sides of the support member 35, respectively.

[0095] The first pivot member 34 is equivalent to the first connecting portion 30 in the first embodiment, the second pivot member 34' is equivalent to the second connecting portion 3b in the first embodiment, and the support member 35 is equivalent to the support portion 31 in the first embodiment. The first pivot member 34 is used to connect the left clamp head 2a and the left bracket 12a, and the second pivot member 34' is used to connect the right clamp head 2b and the right bracket 12b. The left clamp head 2a and the right clamp head 2b are fixed to the left bracket and the right bracket with the support member 35 in between. The sampling needle 7 passes through the through hole 36 set in the center of the support member 35, thereby ensuring the stability of the clamp head bracket.

[0096] In summary, the continuous sampling biopsy forceps provided by the present invention, the forceps head handle of the left forceps head and the forceps head handle of the right forceps head are rotatably connected to the two sides of the front end of the forceps head frame through a support mechanism, and the sampling needle passes through the through hole in the middle of the support mechanism. The support mechanism can ensure that the position of the needle tip is accurate and will not shake. The support mechanism enhances the stability of the forceps head frame, reduces the shaking of the left forceps head and the right forceps head, and facilitates the continuous sampling operation. In the above structure, a support portion is provided in the middle of the support mechanism, and the middle of the support mechanism separates the forceps head handle of the left forceps head and the forceps head handle of the right forceps head, thereby forming a space for accommodating samples between the forceps head handles of the two forceps heads above the support mechanism and between the jaws. The sample storage space is large, which is conducive to multiple continuous sampling.

[0097] The above is a detailed description of the continuous sampling biopsy forceps provided by the present invention. For those skilled in the art, any obvious changes made to it without departing from the essential spirit of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A continuous sampling biopsy forceps, characterized in that It includes a clamp head frame, a left clamp head, a right clamp head, a supporting mechanism and a sampling needle; The clamp head frame comprises a base, a left bracket and a right bracket, wherein the left bracket and the right bracket are arranged on two sides of the base relatively; The support mechanism rotatably connects the left clamp head to the left bracket, and rotatably connects the right clamp head to the right bracket; A through hole is provided in the middle of the support mechanism; the through hole accommodates the sampling needle; the middle of the support mechanism separates the clamp handle of the left clamp head and the clamp handle of the right clamp head, and the sampling needle is located above the support mechanism and the part between the clamp handle of the left clamp head and the clamp handle of the right clamp head forms a sample storage space; The support mechanism comprises a first connecting member and a second connecting member, wherein the first connecting member comprises a first connecting portion and a supporting portion; the first connecting portion extends from a side of the supporting portion facing the left bracket; the first connecting portion is used to hinge the pliers handle of the left pliers head to the left bracket; a connecting hole perpendicular to the through hole is provided on a side of the supporting portion away from the first connecting portion; The second connecting member is used to hinge the pliers handle of the right pliers head to the right bracket, and one end of the second connecting member is inserted into the connecting hole. The through hole is provided in the supporting portion.

2. A continuous sampling biopsy forceps, characterized in that It includes a clamp head frame, a left clamp head, a right clamp head, a supporting mechanism and a sampling needle; The clamp head frame comprises a base, a left bracket and a right bracket, wherein the left bracket and the right bracket are arranged on two sides of the base relatively; The support mechanism rotatably connects the left clamp head to the left bracket, and rotatably connects the right clamp head to the right bracket; A through hole is provided in the middle of the support mechanism; the through hole accommodates the sampling needle; the middle of the support mechanism separates the clamp handle of the left clamp head and the clamp handle of the right clamp head, and the sampling needle is located above the support mechanism and the part between the clamp handle of the left clamp head and the clamp handle of the right clamp head forms a sample storage space; The support mechanism comprises a symmetrical first support component and a second support component; The first supporting component comprises a left connecting portion, a left supporting portion, a left semi-cylindrical through hole, a first matching portion and a second matching portion; The second supporting component includes a right connecting portion, a right supporting portion, a right semi-cylindrical through hole, a first matching portion and a second matching portion; The left connecting portion is used to hinge the pliers head handle of the left pliers head to the left bracket; the right connecting portion is used to hinge the pliers head handle of the right pliers head to the right bracket; Through the connection of the first matching portion and the second matching portion, the left supporting portion and the right supporting portion constitute a supporting portion, and the left semi-cylindrical through hole and the right semi-cylindrical through hole constitute the through hole.

3. A continuous sampling biopsy forceps, characterized in that It includes a clamp head frame, a left clamp head, a right clamp head, a supporting mechanism and a sampling needle; The clamp head frame comprises a base, a left bracket and a right bracket, wherein the left bracket and the right bracket are arranged on two sides of the base relatively; The support mechanism rotatably connects the left clamp head to the left bracket, and rotatably connects the right clamp head to the right bracket; A through hole is provided in the middle of the support mechanism; the through hole accommodates the sampling needle; the middle of the support mechanism separates the clamp handle of the left clamp head and the clamp handle of the right clamp head, and the sampling needle is located above the support mechanism and the part between the clamp handle of the left clamp head and the clamp handle of the right clamp head forms a sample storage space; The support mechanism comprises a first pivot member, a second pivot member and a support member; connecting holes are respectively provided on both sides of the support member, and the first pivot member and the second pivot member are respectively connected to both sides of the support member through the connecting holes; The first pivoting member is used to hinge the pliers head handle of the left pliers head to the left bracket; the second pivoting member is used to hinge the pliers head handle of the right pliers head to the right bracket; The through hole is arranged on the supporting member.

4. The continuous sampling biopsy forceps according to any one of claims 1 to 3, characterized in that: The clamp head frame also includes an arched platform, which 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, and passes through the through hole. Moreover, the front end of the sampling needle extends between the jaws of the left clamp head and the jaws of the right clamp head.

5. The continuous sampling biopsy forceps according to claim 4, characterized in that Also included are a left link and a right link; The rear end of the left pliers head is hinged to the front end of the right connecting rod, and the rear end of the right connecting rod enters the interior of the base from the gap on the right side of the arched platform in the pliers head frame; the rear end of the right pliers head is hinged to 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 pliers head frame.

6. The continuous sampling biopsy forceps according to claim 5, characterized in that: The thickness of the left connecting rod and the right connecting rod is respectively equal to or slightly smaller than the width of the gaps on both sides of the arched platform.

7. The continuous sampling biopsy forceps according to claim 5, characterized in that Including tie rod, The rear ends of the left connecting rod and the right connecting rod are hinged to the top end of the pull rod through guide rivets.

8. The continuous sampling biopsy forceps according to claim 7, characterized in that: The rear end of the pull rod is connected with a connecting pipe.

9. The continuous sampling biopsy forceps according to claim 8, characterized in that: A sleeve is connected to the lower part of the clamp 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 is provided in the center of the blocking part; The pull rod and the connecting pipe pass through the through hole for limiting.

10. The continuous sampling biopsy forceps according to claim 5, characterized in that: The left connecting rod and the right connecting rod respectively include a rod body, a step-shaped boss is formed at the front end of the rod body, and a hinge hole is arranged at the rear end of the rod body.

11. The continuous sampling biopsy forceps according to claim 10, characterized in that: The pliers head handle has an approximately Z-shaped shape, the front end of the pliers head handle is connected to a side edge of the jaws, and the rear end is formed into a curved handle close to the center line of the jaws through an arc transition.

12. The continuous sampling biopsy forceps according to claim 11, characterized in that: The arched platform includes a horizontal portion, an inclined portion and a vertical portion; the two vertical portions extend upward and forward from the front end of the base respectively; one end of the inclined portion is connected to the front end of the vertical portion, and the other end of the inclined portion is connected to one end of the horizontal portion.

13. The continuous sampling biopsy forceps according to claim 7, characterized in that: An internal space is formed below the arched platform for the left connecting rod, the right connecting rod and the pull rod to move up and down; The left bracket and the right bracket have a bottom area that coincides with the internal 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 base is equal to the inner diameter of the bottom region.

14. The continuous sampling biopsy forceps according to any one of claims 1 to 3, characterized in that: The sampling needle comprises a cylindrical needle body, a conical 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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