CN220089521U

CN220089521U - Medical push type biopsy needle and cutting device with same

Info

Publication number: CN220089521U
Application number: CN202222308161.XU
Authority: CN
Inventors: 郭毅军; 谭添
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-11-28
Anticipated expiration: 2032-08-30

Abstract

The utility model discloses a medical push type biopsy needle and a cutting device with the same, wherein the medical push type biopsy needle comprises an outer cutter tube, an inner cutter tube and a driving mechanism, the driving mechanism comprises a pushing piece, a first driving piece and a second driving piece, the pushing piece is connected with an extending section or the first driving piece, the first driving piece is fixedly sleeved on the extending section, a spiral track is arranged on the peripheral wall of the first driving piece, a sliding piece matched with the spiral track is arranged on the second driving piece, and the sliding piece can slide relative to the spiral track so as to drive the first driving piece to rotate to drive the inner cutter tube to rotate. According to the medical push type biopsy needle, the linear reciprocating motion is converted into the reciprocating and rotating motion by utilizing the cooperation of the spiral track and the sliding piece, so that gear transmission is omitted, the structure of the biopsy needle and the handle is simplified, the stability of the biopsy needle is improved, and noise in a sampling process is reduced.

Description

Medical push type biopsy needle and cutting device with same

Technical Field

The utility model relates to surgical instruments, in particular to a medical push type biopsy needle and a cutting device with the same.

Background

Medical cutting devices are used for performing resection treatment of diseased tissue and the like and opening a surgical path in a tissue resection operation. The traditional medical cutting device generally comprises a cutter part and a driving part, wherein the cutter part comprises an outer cutter tube and an inner cutter tube, the front end of the outer cutter tube is laterally provided with a cutting window, and the inner cutter tube is sleeved in the outer cutter tube. The driving part is connected with the inner cutter tube, and when the medical cutting device is connected with a power source (such as a driving motor), the driving motor provides rotary power for the driving part, and the driving part is used for driving the inner cutter tube to axially and rotationally move so as to realize a cutting function. The existing driving part adopts the form of double gears or three gears to rotate, one gear controls the movement in one direction, so that the structure of the handle and the biopsy needle is complex, the stability interference factors are multiple, and a large amount of noise is generated by high-speed rotation vibration of multiple gears.

Disclosure of Invention

Aiming at the current state of the art, the utility model aims to solve the technical problem of providing the medical push type biopsy needle with simple structure, good stability and low noise. Another technical problem to be solved by the present utility model is to provide a cutting device with the above-mentioned medical push-type biopsy needle.

In order to solve the technical problems, the medical push-type biopsy needle provided by the utility model comprises: the outer cutter tube is provided with a cutting window; the inner cutter tube is arranged in the outer cutter tube and comprises an extension section extending out of the rear end of the outer cutter tube; the driving mechanism is used for driving the inner cutter tube to rotate and axially reciprocate; the driving mechanism comprises a pushing piece, a first driving piece and a second driving piece, wherein the pushing piece is directly or indirectly connected with the extending section or the first driving piece, so that the extending section or the first driving piece can rotate relative to the pushing piece and can synchronously and axially move along with the axial movement of the pushing piece, the first driving piece is fixedly sleeved on the extending section, a spiral track is arranged on the peripheral wall of the first driving piece, a sliding piece matched with the spiral track is arranged on the second driving piece, and the sliding piece can slide relative to the spiral track and further drive the first driving piece to rotate so as to drive the inner cutter tube to rotate.

According to the medical push type biopsy needle, the linear reciprocating motion is converted into the reciprocating and rotating motion by utilizing the cooperation of the spiral track and the sliding piece, so that gear transmission is omitted, the structure of the biopsy needle and the handle is simplified, the stability of the biopsy needle is improved, and noise in a sampling process is reduced.

In one embodiment, the number of the sliding pieces is more than two, and the sliding pieces are arranged at intervals along the circumferential direction of the second driving piece.

In one embodiment, the sliding member is spherical or hemispherical, and the spiral track is a groove with a semicircular cross section.

In one embodiment, the second drive member includes a mount on which the slider is mounted.

In one embodiment, the mounting seat is provided with a spherical groove, and the sliding part is accommodated in the spherical groove and can freely roll.

In one embodiment, the second driving member further comprises a fixing sleeve, the fixing sleeve is sleeved on the first driving member, and the mounting seat is mounted on the fixing sleeve.

In one embodiment, the fixing sleeve is provided with a mounting hole, the mounting seat is mounted in the mounting hole, and the sliding piece is exposed out of the mounting hole.

In one embodiment, the medical push-type biopsy needle further comprises a housing, wherein a chute extending along the axial direction is arranged on the housing, a first end of the pushing member is connected with the connecting member, and a second end of the pushing member penetrates through the chute.

In one embodiment, the connecting member is a bearing, the inner ring of the bearing is fixed on the inner cutter tube, and the second end of the pushing member is fixed on the outer ring of the bearing.

The cutting device provided by the utility model comprises a handle and the biopsy needle, wherein the handle comprises a power mechanism for driving the pushing piece to axially move.

The advantageous effects of the additional technical features of the present utility model will be described in the detailed description section of the present specification.

Drawings

FIG. 1 is a front view of a medical push-type biopsy needle according to one embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged partial schematic view of the portion I in FIG. 2;

FIG. 4 is a front view of a first drive member of the medical push-type biopsy needle shown in FIG. 1;

FIG. 5 is a front view of a second drive member of the medical push-type biopsy needle shown in FIG. 1;

fig. 6 is a sectional view taken along line B-B of fig. 5.

Reference numerals illustrate: 10. an outer cutter tube; 11. a tip portion; 12. cutting the window; 20. an inner cutter tube; 22. a cutter head; 24. an extension section; 30. a first driving member; 32. a spiral track; 40. a second driving member; 42. a slider; 44. a mounting base; 46. a fixed sleeve; 50. a pushing member; 52. a first end; 54. a second end; 60. a housing; 62. a chute; 70. a cutter tube support; 80. a bearing; 82. an inner ring; 84. an outer ring.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily apparent, a more particular description of the utility model briefly described above will be rendered by reference to the appended drawings. It is apparent that the specific details described below are only some of the embodiments of the present utility model and that the present utility model may be practiced in many other embodiments that depart from those described herein. Based on the embodiments of the present utility model, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.

In this document, when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms front, rear, upper, lower, etc. are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the clarity and convenience of the expression technical scheme. It should be understood that the use of such orientation terms should not limit the scope of the claimed utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1 and 2, the medical push type biopsy needle according to one embodiment of the present utility model includes a housing 60, an outer cutter tube 10, an inner cutter tube 20, and a driving mechanism. The housing 60 is exemplified by a hollow tubular structure extending in the axial direction. The outer cutter tube 10 has a front end remote from the housing 60 and a rear end close to the housing 60, the front end of the outer cutter tube 10 being provided with a tip 11, the tip 11 penetrating the tissue with the aid of an ultrasound imaging or X-ray imaging device. A cutting window 12 is arranged on the pipe wall of the outer cutter pipe 10 close to the front end, a cutter pipe support member 70 is arranged at the rear end of the outer cutter pipe 10, and the cutter pipe support member 70 is fixedly connected with the rear end of the outer cutter pipe 10.

The inner cutter tube 20 is disposed in the outer cutter tube 10, the front end of the inner cutter tube 20 has a cutter head 22 for cutting tissue through the cutting window 12, and the rear end of the inner cutter tube 20 is inserted into the housing 60 from the rear end of the outer cutter tube 10, and for convenience of description, the portion of the inner cutter tube 20 extending out of the outer cutter tube 10 is defined as an extension 24. When the cutter head 22 of the inner cutter tube 20 is a cutting edge, the cutting window 12 is provided on the front end side of the outer cutter tube 10, and the cutter head 22 is rotated rapidly, realizing a cutting function of the cutter head 22 for the tissue entered into the cutting window 12.

The driving mechanism is used for driving the inner cutter tube 20 to rotate and axially reciprocate. The driving mechanism comprises a pushing member 50, a first driving member 30 and a second driving member 40, wherein the pushing member 50 is connected with the extending section 24 through a connecting member, so that the extending section 24 can rotate relative to the pushing member 50 and can synchronously and axially move along with the axial movement of the pushing member 50, the first driving member 30 is fixedly sleeved on the extending section 24, a spiral track 32 is arranged on the peripheral wall of the first driving member 30, a sliding member 42 matched with the spiral track 32 is arranged on the second driving member 40, and the sliding member 42 can slide relative to the spiral track 32, so that the first driving member 30 is driven to rotate to drive the inner cutter tube 20 to rotate. The drive mechanism converts linear reciprocating motion into reciprocating and rotating motion by utilizing the cooperation of the spiral track 32 and the sliding piece 42, gear transmission is omitted, biopsy needle and handle structures are simplified, stability of the biopsy needle is improved, and noise in a sampling process is reduced.

As shown in fig. 3 and 4, the exemplary slider 42 is spherical (or hemispherical), the spiral track 32 is a groove having a semicircular cross section, and the slider 42 is partially accommodated in the spiral track 32. The sliding piece 42 and the spiral track 32 adopt the structure, so that the matching area of the sliding piece 42 and the spiral track 32 is large, and the stability is good. The slider may be a thread or other sliding structure that mates with a helical track, in addition to being spherical.

As shown in fig. 5 and 6, the second driving member 40 includes a mounting base 44 as an example, and the sliding member 42 is mounted on the mounting base 44. Preferably, the mounting base 44 is provided with a spherical recess, and the sliding member 42 is partially accommodated in the spherical recess and can freely roll. In this way, the sliding friction is converted into rolling friction, and resistance and noise are reduced. Preferably, the second driving member 40 further includes a fixing sleeve 46, the fixing sleeve 46 is sleeved on the first driving member 30, the mounting seat 44 is mounted on the fixing sleeve 46, and the fixing sleeve 46 is fixed in the housing 60. By way of example, the fixing sleeve 46 is provided with a radially penetrating mounting hole, the mounting seat 44 is mounted in the mounting hole, and the slider 42 is exposed from the mounting hole.

As shown in fig. 1, the housing 60 is provided with an axially extending chute 62, the first end 52 of the pushing member 50 is connected to the connecting member, and the second end 54 of the pushing member 50 passes through the chute 62. Preferably, the connector is a bearing 80, an inner race 82 of the bearing 80 is fixed to the inner cutter tube 20, and the second end 54 of the pusher member 50 is fixed to an outer race 84 of the bearing 80. In one embodiment, the second end 54 of the pushing member 50 has an annular structure, and the second end 54 of the pushing member 50 is sleeved on the outer ring 84 of the bearing 80.

The working principle of the medical push type biopsy needle in the embodiment is as follows: the pushing force of a handle (not shown) is transmitted to the inner cutter tube 20 through the pushing member 50 and the bearing 80, and the axial travel of the inner cutter tube 20 is controlled without limiting the circumferential rotation of the inner cutter tube 20. The sliding piece 42 can freely roll in the mounting seat 44, the sliding piece 42 can freely roll according to the outline of the spiral track 32 of the first driving piece 30, thrust is converted into the rotation of the inner cutter tube 20 through the cooperation of the spiral track 32 and the sliding piece 42, and finally the purpose of rotary cutting and sampling is achieved.

In another embodiment of the present utility model, a cutting device is provided comprising a handle and said medical pusher-type biopsy needle, the handle comprising a power mechanism for driving said pusher member 50 axially.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A medical push-type biopsy needle comprising:

the outer cutter tube is provided with a cutting window;

the inner cutter tube is arranged in the outer cutter tube and comprises an extension section extending out of the rear end of the outer cutter tube;

the driving mechanism is used for driving the inner cutter tube to rotate and axially reciprocate;

the driving mechanism comprises a pushing piece, a first driving piece and a second driving piece, wherein the pushing piece is directly or indirectly connected with the extending section or the first driving piece, so that the extending section or the first driving piece can rotate relative to the pushing piece and can synchronously and axially move along with the axial movement of the pushing piece, the first driving piece is fixedly sleeved on the extending section, a spiral track is arranged on the peripheral wall of the first driving piece, a sliding piece matched with the spiral track is arranged on the second driving piece, and the sliding piece can slide relative to the spiral track so as to drive the first driving piece to rotate to drive the inner cutter tube to rotate.

2. The medical push type biopsy needle of claim 1, wherein the number of the sliding members is more than two, and the sliding members are arranged at intervals along the circumferential direction of the second driving member.

3. The medical pusher-type biopsy needle of claim 1, wherein the slider is spherical or hemispherical and the helical track is a groove having a semicircular cross section.

4. A medical push-type biopsy needle according to claim 3, wherein the second drive member comprises a mounting on which the slider member is mounted.

5. The medical push-type biopsy needle of claim 4, wherein the mounting base has a spherical recess therein, the slider portion being received in the spherical recess and free to roll.

6. The medical push-type biopsy needle of claim 4, wherein the second drive member further comprises a retaining sleeve disposed over the first drive member, and wherein the mounting base is mounted on the retaining sleeve.

7. The medical push type biopsy needle of claim 5, wherein the fixing sleeve is provided with a mounting hole, the mounting seat is arranged in the mounting hole, and the sliding piece is exposed out of the mounting hole.

8. The medical push-type biopsy needle of any one of claims 1-7, further comprising a housing having an axially extending chute disposed thereon, wherein the first end of the pusher member is coupled to the extension by a coupling member, and wherein the second end of the pusher member extends through the chute.

9. The medical push-type biopsy needle of claim 8, wherein the connector is a bearing, an inner race of the bearing is secured to the inner cutter tube, and a second end of the pusher is secured to an outer race of the bearing.

10. A cutting device comprising a handle and a biopsy needle according to any one of claims 1 to 9, the handle comprising a power mechanism for driving the pusher member in axial movement.