CN112472153B - Disposable living body sampling forceps with multi-angle adjustment function - Google Patents

Abstract

The invention discloses a multi-angle adjustable disposable living body sampling forceps which is characterized by comprising an operation handle, a forceps body, jaws and a traction steel wire, wherein one end of the traction steel wire is connected with the operation handle, the other end of the traction steel wire is connected with the forceps body, one end of the forceps body is connected with the operation handle, the other end of the forceps body is connected with the jaws, and the jaws are provided with a pair of forceps flaps which are controlled to open and close by a swing rod mechanism. The disposable biopsy forceps have the advantages of simple structure and reasonable design of the connecting part, and can achieve the purpose of taking the biopsy in medicine.

Description

A disposable biopsy forceps with multi-angle adjustment

Technical Field

The present invention relates to the technical field of medical equipment, and more specifically, to a disposable biopsy forceps capable of adjusting multiple angles.

Background technique

Biopsy forceps are special instruments used to collect living tissue samples from the digestive tract, respiratory tract, urinary system, etc. for pathological analysis. Biopsy forceps can be inserted into the patient's body through the endoscope to examine the lesion and clamp the lesion. They are increasingly used in clinical medical examinations and are an indispensable tool for endoscopic examinations to obtain pathological specimens.

Since smaller diseased tissues present different shapes and are very smooth in the body's channels, it is difficult to observe the diseased tissues when clamping with traditional biopsy forceps, and the forceps need to be adjusted to a suitable angle to clamp the diseased tissues. After the traditional body sampling forceps are inserted into the body's channels, it is difficult to adjust the clamping angle, and the forceps can only be repeatedly pulled out of the endoscope to adjust the angle before entering to try to clamp the tissues. This repeated adjustment is time-consuming and laborious, inconvenient to operate, and easily causes scratches on the inner wall of the endoscope. At the same time, the long inspection time also increases the patient's pain.

Summary of the invention

The purpose of the present invention is to solve the problem that traditional sampling forceps are not suitable for adjusting the clamping angle, the adjustment is time-consuming and labor-intensive, and the operation is inconvenient, which easily causes scratches on the inner wall of the endoscope. A disposable living body sampling forceps with multi-angle adjustment is proposed. The forceps of the sampling forceps can be adjusted to a suitable angle only by adjusting the structure of the sampling forceps.

The present invention achieves the above-mentioned object through the following technical scheme: a disposable biopsy forceps with multi-angle adjustment, comprising an operating handle, a forceps body, a forceps and a traction wire, one end of the traction wire is connected to the operating handle, the other end of the traction wire is connected to one end of the forceps body, the other end of the forceps body is connected to the jaws, and the jaws have a pair of jaws whose opening and closing are controlled by a rocker mechanism;

The operating handle includes a pull ring, a guide rail, an upper slip ring and a lower slip ring, and the pull ring is fixedly connected to the guide rail; the upper slip ring and the lower slip ring have the same structure, and a circular groove for installing a planetary gear is provided between the upper slip ring and the lower slip ring; the upper slip ring and the lower slip ring are both mounted on the guide rail, and the upper slip ring and the lower slip ring can move along the guide rail; the planetary gear includes a sun gear, a planetary gear and a driving gear ring, and the driving gear ring is installed on the circular groove between the upper slip ring and the lower slip ring, and the planetary gear and the sun gear are respectively arranged inside the driving gear ring, and the inner ring of the driving gear ring is meshed with the planetary gear, and the planetary gear is meshed with the sun gear; one end of the traction wire is fixedly connected to the sun gear, and when the driving gear ring rotates, the driving gear ring drives the rotation of the planetary gear through the meshing of the gears, and the rotation of the planetary gear drives the rotation of the sun gear through the meshing of the gears, and the rotation of the traction wire is driven by the fixed connection between the sun gear and the traction wire;

The clamp body comprises an outer sleeve, a spring return mechanism, a stepped sleeve, a primary slider rocker mechanism and a gear rack mechanism;

The spring return mechanism comprises a first spring tube and a second spring tube, a stepped sleeve is arranged between the first spring tube and the second spring tube, the stepped sleeve is a stepped hollow cylinder with a large diameter in the middle and small diameters at both ends, the cylindrical parts with small diameters at both ends of the stepped sleeve are respectively sleeved in the first spring tube and the second spring tube, the large cylindrical part in the middle of the stepped sleeve forms an axial positioning with the outer rings of the first spring tube and the second spring tube, wherein the other end of the first spring tube contacts the outer sleeve, one end of the outer sleeve is welded to the bottom of the operating handle, and the other end forms an axial positioning with the first spring tube;

The traction wire passes through the outer sleeve, the first spring tube, the stepped sleeve, the second spring tube in sequence after coming out of the slip ring of the operating handle, and is then connected to the driving end of the primary slider swing mechanism.

The first-level slider swing mechanism includes a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a swing rod, wherein the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod form a complete planar four-bar mechanism, one end of the first connecting rod and the second connecting rod are hinged together to form a driving end of the planar four-bar mechanism, a traction wire is connected to the driving end of the planar four-bar mechanism, the other end of the first connecting rod is hinged to one end of the third connecting rod, the other end of the second connecting rod is hinged to one end of the fourth connecting rod, the middle parts of the third connecting rod and the fourth connecting rod are hinged together, and the hinge shafts of the middle parts of the third connecting rod and the fourth connecting rod are fixed on the outer sleeve; the other end of the fourth connecting rod is hinged to one end of the swing rod, and the other end of the swing rod is the output end of the planar four-bar mechanism, and the output end of the planar four-bar mechanism is connected to the driving end of the gear rack mechanism;

The gear rack mechanism includes a connecting rod sleeve, a first rack, a gear and a second rack. The connecting rod sleeve is sleeved on the third connecting rod and can move linearly along the third connecting rod. The other end of the swing rod is hinged at one end of the connecting rod sleeve. The first rack is fixed on the connecting rod sleeve. The first rack and the second rack are arranged in parallel and both are meshed with the gear. The gear is fixed on the third connecting rod. The second rack is sleeved in the connecting rod sleeve and can move linearly along the connecting rod sleeve. The swing rod of the primary slider swing mechanism connected to one end of the first rack serves as the driving end of the gear rack mechanism, and transmits the driving force to the second rack as the output end of the gear rack mechanism through the principle of the gear rack mechanism. The output end of the gear rack mechanism is connected to the jaws.

Furthermore, the jaws include a secondary slider rocker mechanism and a jaw flap, which are hinged with each other. The secondary slider rocker mechanism includes a fifth link, a sixth link, a seventh link, and an eighth link. One end of the fifth link is hinged to the sixth link, the other end of the fifth link is hinged to one end of the seventh link, the other end of the sixth link is hinged to one end of the eighth link, the other end of the seventh link is hinged to the other end of the eighth link, and the two jaw flaps are respectively fixed on the seventh link and the eighth link. The hinged ends of the fifth link and the sixth link are the input ends of the secondary slider rocker mechanism and are connected to the output end of the rack and pinion mechanism, and the hinged ends of the seventh link and the eighth link are connected to the end of the third link; the secondary slider rocker mechanism is connected to the second rack of the rack and pinion mechanism as a driving end, and the output end of the secondary slider rocker mechanism is connected to the jaw flap to control the opening and closing movement of the jaw flap.

Furthermore, the pull ring structure is an annular ring that can accommodate the size of a finger.

Furthermore, one end of the traction wire is fixedly connected to the center of the sun gear.

The beneficial effect of the present invention is that the present invention can realize the rotation and swing of the jaws of the living body sampling forceps, ensuring the reliability of the clamping of the forceps petal. The present invention has a simple structure and does not increase the cost, conforms to the economic concept and use concept of disposable products, and is suitable for clinical promotion.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a disposable biopsy forceps with multi-angle adjustment according to the present invention.

FIG. 2 is a schematic diagram of the structure of the operating handle of the present invention.

FIG. 3 is an enlarged schematic diagram of the planetary gear structure of the present invention.

FIG. 4 is a schematic diagram of the clamp body structure of the present invention.

FIG. 5 is a schematic diagram of the jaw structure of the present invention.

In the figure, 1-operating handle, 101-pull ring, 102-guide rail, 103-upper sliding ring, 104-lower sliding ring, 2-traction wire, 3-clamp body, 301-outer sleeve, 302-step sleeve, 4-jaw, 401-fifth connecting rod, 402-sixth connecting rod, 403-seventh connecting rod, 404-eighth connecting rod, 405-first jaw, 406-second jaw, 5-planetary gear, 501-sun gear, 502-planetary gear, 503-driving gear ring, 6-spring return mechanism, 601-first spring tube, 602-second spring tube, 7-first slider rocker mechanism, 701-first connecting rod, 702-second connecting rod, 703-third connecting rod, 704-fourth connecting rod, 705-swing rod, 8-gear rack mechanism, 801-first rack, 802-gear, 803-second rack.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in Figures 1 to 5, a disposable biopsy forceps with multi-angle adjustment is characterized in that it includes an operating handle 1, a forceps body 103, a forceps and a traction wire 102, one end of the traction wire 102 is connected to the operating handle 1, the other end of the traction wire 102 is connected to one end of the forceps body 103, and the other end of the forceps body 103 is connected to the jaws 4, and the jaws 4 have a pair of jaws whose opening and closing are controlled by a rocker mechanism.

The operating handle 1 includes a pull ring 101, a guide rail 102, an upper slip ring 103 and a lower slip ring 104, wherein the pull ring 101 is fixedly connected to the guide rail 102; the upper slip ring 103 and the lower slip ring 104 have the same structure, and a circular groove for mounting the planetary gear 5 is provided between the upper slip ring 103 and the lower slip ring 104; the upper slip ring 103 and the lower slip ring 104 are both mounted on the guide rail 102, and the upper slip ring 103 and the lower slip ring 104 can move along the guide rail 102; the planetary gear 5 includes a sun gear 501, a planetary gear 502 and a drive gear ring 503, wherein the drive gear ring 503 is mounted on the upper slip ring 103. On the circular groove between the lower sliding ring 104, the planetary gear 502 and the sun gear 501 are respectively arranged inside the driving ring gear 503, the inner ring of the driving ring gear 503 is meshed with the planetary gear 5, and the planetary gear 5 is meshed with the sun gear 501; one end of the traction wire 102 is fixedly connected to the sun gear 501, and when the driving ring gear 503 rotates, the driving ring gear 503 drives the rotation of the planetary gear 502 through the meshing of the gears, and the rotation of the planetary gear 502 drives the rotation of the sun gear 501 through the meshing of the gears, and the rotation of the traction wire 102 is driven by the fixed connection between the sun gear 501 and the traction wire 102.

The pliers body 103 includes an outer sleeve 301 , a spring return mechanism 6 , a stepped sleeve 302 , a primary slider rocker mechanism and a gear rack mechanism 8 .

The spring return mechanism 6 includes a first spring tube 601 and a second spring tube 602, a stepped sleeve 302 is arranged between the first spring tube 601 and the second spring tube 602, the stepped sleeve 302 is a stepped hollow cylinder with a large diameter in the middle and small diameters at both ends, the cylindrical parts with small diameters at both ends of the stepped sleeve 302 are respectively sleeved in the first spring tube 601 and the second spring tube 602, the middle large cylindrical part of the stepped sleeve 302 forms an axial positioning with the outer rings of the first spring tube 601 and the second spring tube 602, wherein the other end of the first spring tube 601 contacts with the outer sleeve 301, one end of the outer sleeve 301 is welded to the bottom of the operating handle 1, and the other end forms an axial positioning with the first spring tube 601. The outer sleeve 301 itself is divided into two sections, front and rear. The two sections of the outer sleeve 301 are separated by the first spring tube 601, the stepped sleeve 302 and the second spring tube 602 to realize the contraction and reset of the outer sleeve 301. The front section of the outer sleeve 301 is welded to the operating handle 1, and the rear section of the outer sleeve 301 is movably connected to facilitate the rotation of the outer sleeve 301 and the pliers head as a whole.

After coming out of the slip ring of the operating handle 1 , the traction wire 102 passes through the outer sleeve 301 , the first spring tube 601 , the stepped sleeve 302 , the second spring tube 602 in sequence, and is connected to the driving end of the primary slider swing mechanism 7 .

The first-stage slider swing mechanism 7 includes a first connecting rod 701, a second connecting rod 702, a third connecting rod 703, a fourth connecting rod 704 and a swing rod 705, wherein the first connecting rod 701, the second connecting rod 702, the third connecting rod 703, and the fourth connecting rod 704 form a complete planar four-bar mechanism, one end of the first connecting rod 701 and the second connecting rod 702 are hinged together to form a driving end of the planar four-bar mechanism, the traction wire 102 is connected to the driving end of the planar four-bar mechanism, and the other end of the first connecting rod 701 It is hinged to one end of the third connecting rod 703, the other end of the second connecting rod 702 is hinged to one end of the fourth connecting rod 704, the middle parts of the third connecting rod 703 and the fourth connecting rod 704 are hinged together, and the hinge shafts of the middle parts of the third connecting rod 703 and the fourth connecting rod 704 are fixed on the outer sleeve 301; the other end of the fourth connecting rod 704 is hinged to one end of the swing rod 705, and the other end of the swing rod 705 is the output end of the planar four-bar mechanism, and the output end of the planar four-bar mechanism is connected to the driving end of the gear rack mechanism 8.

The rack and pinion mechanism 8 includes a connecting rod sleeve, a first rack 801, a gear 802 and a second rack 803. The connecting rod sleeve is sleeved on the third connecting rod 703 and can move linearly along the third connecting rod 703. The other end of the swing rod 705 is hinged at one end of the connecting rod sleeve. The first rack 801 is fixed on the connecting rod sleeve. The first rack 801 and the second rack 803 are arranged in parallel and the first rack 801 and the second rack 803 are both meshed with the gear 802. The second rack 803 is sleeved in the connecting rod sleeve and can move linearly along the connecting rod sleeve. The swing rod 705 of the primary slider swing mechanism 7 connected to one end of the first rack 801 serves as the driving end of the rack and pinion mechanism 8, and transmits the driving force to the second rack 803 as the output end of the rack and pinion mechanism 8 through the principle of the rack and pinion mechanism 8; the output end of the rack and pinion mechanism 8 is connected to the jaw 4.

The jaw 4 includes a secondary slider rocker mechanism and a jaw flap, which are hinged with each other. The secondary slider rocker mechanism includes a fifth link 401, a sixth link 402, a seventh link 403, and an eighth link 404. The fifth link 401 is hinged to one end of the sixth link 402, the other end of the fifth link 401 is hinged to one end of the seventh link 403, the other end of the sixth link 402 is hinged to one end of the eighth link 404, and the other end of the seventh link 403 is hinged to the eighth link 404. The two ends are hingedly connected, and the two jaws are fixed on the seventh connecting rod 403 and the eighth connecting rod 404 respectively. The hinged ends of the fifth connecting rod 401 and the sixth connecting rod 402 are the input ends of the secondary slider rocker mechanism and are connected to the output end of the gear rack mechanism 8. The hinged ends of the seventh connecting rod 403 and the eighth connecting rod 404 are connected to the end of the third connecting rod 703. The secondary slider rocker mechanism is connected to the second rack 803 of the gear rack mechanism 8 as a driving end, and the output end of the secondary slider rocker mechanism is connected to the jaws to control the opening and closing movement of the jaws. The jaws include a first jaw 405 and a second jaw 406. The first jaw 405 is fixed on the seventh connecting rod 403, and the second jaw 406 is fixed on the eighth connecting rod 404.

The pull ring 101 is a ring-shaped ring that can accommodate a finger.

One end of the traction wire 102 is fixedly connected to the center of the sun gear 501 .

The specific detailed operation mode of the present invention is as follows:

Rotation of the jaws: Medical staff controls the rotation of the driving gear ring 503 on the operating handle 1, and drives the rotation of the traction wire 2 through the planetary gear train 5. The traction wire 2 then transmits the rotational force to the primary slider swing mechanism 7 on the jaw body 3, and then the swing rod 705 transmits the rotational force to the gear rack mechanism 8. The output end of the gear rack mechanism 8 is connected to the jaws 4, thereby realizing the rotation of the jaws 4.

Swinging of the jaws: Medical staff moves the lower sliding ring 104 on the operating handle 1, and transmits the tensile force to the spring reset mechanism 6 in sequence through the traction wire 2 in the lower sliding ring. According to the expansion and contraction deformation of the spring in the spring reset mechanism 6, it is transmitted to the swing rod 705 of the primary slider swing mechanism 7 to realize the swinging motion, and then the swinging motion is transmitted to the driving end of the gear rack mechanism 8, and then the output end of the gear rack mechanism 8 is connected to the jaws 4, thereby realizing the swinging of the jaws 4.

The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims (2)

1. A disposable biopsy forceps of multi-angle regulation, its characterized in that: the novel multifunctional pliers comprise an operating handle (1), a pliers body (3), pliers and a traction steel wire (2), wherein one end of the traction steel wire (2) is connected with the operating handle (1), the other end of the traction steel wire (2) is connected with one end of the pliers body (3), the other end of the pliers body (3) is connected with a jaw (4), and the jaw (4) is provided with a pair of pliers flaps controlled to open and close by a swing rod mechanism;

The operating handle (1) comprises a pull ring (101), a guide rail (102), an upper sliding ring (103) and a lower sliding ring (104), wherein the pull ring (101) is fixedly connected with the guide rail (102); the upper sliding ring (103) and the lower sliding ring (104) have the same structure, and a circular groove for installing the planetary gear (5) is arranged between the upper sliding ring (103) and the lower sliding ring (104); the upper sliding ring (103) and the lower sliding ring (104) are sleeved on the guide rail (102), and the upper sliding ring (103) and the lower sliding ring (104) can move along the guide rail (102); the planetary gear (5) comprises a sun gear (501), a planet gear (502) and a driving gear ring (503), wherein the driving gear ring (503) is arranged on a circular groove between the upper slip ring (103) and the lower slip ring (104), the planet gear (502) and the sun gear (501) are respectively arranged in the driving gear ring (503), an inner ring of the driving gear ring (503) is meshed with the planetary gear (5), and the planetary gear (5) is meshed with the sun gear (501); one end of the traction steel wire (2) is fixedly connected to the sun gear (501), when the gear ring (503) is driven to rotate, the gear ring (503) is driven to drive the planet gear (502) to rotate through the meshing of the gears, the rotation of the planet gear (502) drives the sun gear (501) to rotate through the meshing of the gears, and the sun gear (501) is fixedly connected with the traction steel wire (2) to drive the traction steel wire (2) to rotate;

The pliers body (3) comprises an outer sleeve (301), a spring reset mechanism (6), a step sleeve (302), a primary sliding block swing rod mechanism and a gear rack mechanism (8);

The spring return mechanism (6) comprises a first spring tube (601) and a second spring tube (602), a stepped sleeve (302) is arranged between the first spring tube (601) and the second spring tube (602), the stepped sleeve (302) is a stepped hollow cylinder with a large middle diameter and a small two ends, the cylindrical parts with the small diameters at the two ends of the stepped sleeve (302) are respectively sleeved in the first spring tube (601) and the second spring tube (602), the middle large cylindrical part of the stepped sleeve (302) and the outer rings of the first spring tube (601) and the second spring tube (602) form axial positioning, the other end of the first spring tube (601) is in contact with an outer sleeve (301), one end of the outer sleeve (301) is welded at the bottom of the operating handle (1), and the other end of the outer sleeve and the first spring tube (601) form axial positioning;

The traction steel wire (2) sequentially passes through the outer sleeve (301), the first spring tube (601), the step sleeve (302) and the second spring tube (602) after coming out of the slip ring of the operating handle (1) and then is connected with the driving end of the primary sliding block swinging mechanism (7);

The primary sliding block swinging mechanism (7) comprises a first connecting rod (701), a second connecting rod (702), a third connecting rod (703), a fourth connecting rod (704) and a swinging rod (705), wherein the first connecting rod (701), the second connecting rod (702), the third connecting rod (703) and the fourth connecting rod (704) form a complete plane four-bar mechanism, one end of the first connecting rod (701) and one end of the second connecting rod (702) are hinged together to form a driving end of the plane four-bar mechanism, a traction steel wire (2) is connected to the driving end of the plane four-bar mechanism, the other end of the first connecting rod (701) is hinged with one end of the third connecting rod (703), the other end of the second connecting rod (702) is hinged with one end of the fourth connecting rod (703), the middle parts of the third connecting rod (703) and the fourth connecting rod (704) are hinged together, and a hinge shaft at the middle parts of the third connecting rod (703) and the fourth connecting rod (704) is fixed on the outer sleeve (301); the other end of the fourth connecting rod (704) is hinged with one end of a swinging rod (705), the other end of the swinging rod (705) is an output end of a plane four-bar mechanism, and the output end of the plane four-bar mechanism is connected with the driving end of a gear rack mechanism (8);

The gear rack mechanism (8) comprises a connecting rod shaft sleeve, a first rack (801), a gear (802) and a second rack (803), wherein the connecting rod shaft sleeve is sleeved on the third connecting rod (703) and can linearly move along the third connecting rod (703), the other end of the swinging rod (705) is hinged to one end of the connecting rod shaft sleeve, the first rack (801) is fixed on the connecting rod shaft sleeve, the first rack (801) and the second rack (803) are arranged in parallel, the first rack (801) and the second rack (803) are meshed with the gear (802), the second rack (803) is sleeved in the connecting rod shaft sleeve and can linearly move along the connecting rod shaft sleeve, and the swinging rod (705) of the primary sliding block swinging mechanism (7) connected with one end of the first rack (801) serves as a driving end of the gear rack mechanism (8), and driving force is transmitted to the second rack (803) through the gear (802) to serve as an output end of the gear rack mechanism (8); the output end of the gear rack mechanism (8) is connected with the jaw (4);

The jaw (4) comprises a second-stage slider swing rod mechanism and a clamp flap, the second-stage slider swing rod mechanism is hinged with the clamp flap, the second-stage slider swing rod mechanism comprises a fifth connecting rod (401), a sixth connecting rod (402), a seventh connecting rod (403) and an eighth connecting rod (404), one ends of the fifth connecting rod (401) and the sixth connecting rod (402) are hinged, the other ends of the fifth connecting rod (401) are hinged with one end of the seventh connecting rod (403), the other ends of the sixth connecting rod (402) are hinged with one end of the eighth connecting rod (404), the other ends of the seventh connecting rod (403) are hinged with the other ends of the eighth connecting rod (404), the two clamp flaps are respectively fixed on the seventh connecting rod (403) and the eighth connecting rod (404), the hinged ends of the fifth connecting rod (401) and the sixth connecting rod (402) are the input ends of the second-stage slider swing rod mechanism and are connected with the output end of the gear rack mechanism (8), and the hinged ends of the seventh connecting rod (403) and the eighth connecting rod (404) are connected with the end of the third connecting rod (703); the second-stage slider swing rod mechanism is connected with a second rack (803) of the gear rack mechanism (8) to serve as a driving end, and the output end of the second-stage slider swing rod mechanism is connected with the clamp valve to control the opening and closing movement of the clamp valve;

One end of the traction steel wire (2) is fixedly connected to the central part of the sun gear (501).

2. A multi-angle adjustable disposable biopsy forceps as claimed in claim 1, wherein: the pull ring (101) is configured to receive a finger-sized annular ring.