CN216797779U

CN216797779U - Guide pin mechanism and biopsy puncture instrument

Info

Publication number: CN216797779U
Application number: CN202123177857.5U
Authority: CN
Inventors: 姜启
Original assignee: Hunan Terui Precision Medical Instrument Co ltd
Current assignee: Hunan Terui Precision Medical Instrument Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-24
Anticipated expiration: 2031-12-16

Abstract

The application discloses a guide pin mechanism, which comprises a guide rod 11, a mounting seat 12 and a bolt 13, wherein the guide rod 11 is provided with a guide chute 110 in sliding fit with the mounting seat 12, an elastic part 14 is arranged between the bolt 13 and the mounting seat 12, and a puncture guide pin 10 is provided with a first bolt hole matched with the bolt 13; when assembling, puncture guiding needle 10 is installed on installation seat 12, first bolt hole of puncture guiding needle 10 is aligned with bolt 13, bolt 13 is inserted into first bolt hole under the action of elastic piece 14 to fix puncture guiding needle 10 on installation seat 12. A biopsy puncture instrument comprises a needle guide mechanism. The needle guide mechanism and the biopsy puncture instrument have simple structures, only need to insert and extract the bolt during needle installation and needle removal, have simple operation, avoid misoperation and improve use safety, and meanwhile, the bolt fixes the puncture guide needle, thereby improving the assembly stability and reliability of the puncture guide needle, avoiding the puncture guide needle from deviating in the puncture process and improving the puncture precision.

Description

Guide pin mechanism and biopsy puncture instrument

Technical Field

The application relates to the technical field of medical instruments, in particular to a guide pin mechanism and a biopsy puncture instrument.

Background

The biopsy puncture is a common minimally invasive surgical operation in clinic, a patient is firstly subjected to CT positioning scanning, data information such as the accurate position of a focus, coordinates of a skin puncture point, the needle insertion depth and the needle insertion angle can be determined according to a CT positioning scanning image, and a puncture point mark is made on the surface of the skin of the patient; then the operator operates the biopsy puncture instrument to puncture the puncture needle into the skin through the puncture point.

The biopsy puncture needle used clinically at present has the disadvantages of complex structure of a guide mechanism, complex needle mounting and needle removing operation, inconvenience in use and requirements on experience and operation level of operators. In addition, after the puncture is in place, the manual needle removal is easy to cause misoperation, the puncture needle is caused to shift, and the safety risk is brought to the patient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a needle guide mechanism and a biopsy puncture instrument.

The technical scheme provided by the application is as follows:

a guide pin mechanism comprises a guide rod 11, a mounting seat 12 and a plug pin 13, wherein the guide rod 11 is provided with a guide sliding groove 110 in sliding fit with the mounting seat 12, an elastic part 14 is arranged between the plug pin 13 and the mounting seat 12, and a puncture guide pin 10 is provided with a first plug pin hole matched with the plug pin 13; when assembled, the puncture guide needle 10 is mounted on the mounting seat 12, the first latch hole of the puncture guide needle 10 is aligned with the latch 13, and the latch 13 is inserted into the first latch hole under the action of the elastic member 14 to fix the puncture guide needle 10 on the mounting seat 12.

Preferably, the mounting seat 12 includes a guide slider 121 slidably engaged with the guide chute 110, a first mounting hole engaged with the tail end of the puncture guide needle 10 is disposed at a head end of the guide slider 121, a second latch hole engaged with the latch 13 is further disposed on the guide slider 121, the first mounting hole and the second latch hole are communicated, and when the tail end of the puncture guide needle 10 is inserted into the first mounting hole, the first latch hole of the puncture guide needle 10 is aligned with the second latch hole of the guide slider 121.

Preferably, an unlocking piece 15 is arranged at the head end of the guide rod 11, and an unlocking part 131 matched with the unlocking piece 15 is arranged on the bolt 13; when latch 13 moves to unlocking member 15 to lift unlocking member 131 of latch 13, latch 13 is disengaged from first latch hole of puncture guide needle 10.

Preferably, the unlocking piece 15 has an unlocking step 150, the unlocking step 150 is provided with a guide inclined plane 1501, a transition plane 1502 and a stop arc surface 1503 which are connected in sequence, and the unlocking part 131 of the bolt 13 is a circular wheel matched with the stop arc surface 1503 of the unlocking piece 15.

Preferably, a buffer collar 16 is also included which fits over the head end port of the guide rod 11.

Preferably, a positioning collar 17 is also included which fits over puncture introducer needle 10.

Preferably, the mounting seat 12 includes a guide slider 121 and a bracket 122, and the guide slider 121 of the mounting seat 12 is slidably engaged with the guide chute 110; one end of the bracket 122 is fixed on the guide sliding block 121, the other end of the bracket is provided with a second mounting hole for mounting the bolt 13, and the bolt 13 is inserted into the second mounting hole and can slide along the second mounting hole; the elastic member 14 is connected between the bracket 122 of the mounting seat 12 and the latch 13.

Preferably, the elastic member 14 is a spring, and the spring is sleeved on the latch 13, and has one end connected to the bracket 122 and the other end connected to the latch 13.

Preferably, the bracket 122 includes a first mounting portion, a connecting portion and a second mounting portion that are connected in sequence, the connecting portion of the bracket 122 is parallel to the axial direction of the plug pin 13 and is perpendicular to the first mounting portion and the second mounting portion, wherein the first mounting portion of the bracket 122 is fixed on the guide sliding block 121, and the second mounting portion of the bracket 122 is provided with the second mounting hole.

A biopsy puncture instrument comprises any one of the guide pin mechanisms in the technical scheme.

The needle guide mechanism and the biopsy puncture instrument have simple structures, only need to insert and extract the bolt for needle installation and needle removal, have simple operation, avoid misoperation and improve the use safety, and meanwhile, the bolt fixes the puncture guide needle, thereby improving the assembly stability and reliability of the puncture guide needle, avoiding the puncture guide needle from deviating in the puncture process and improving the puncture precision. In addition, the unlocking part of the unlocking piece and the unlocking part of the bolt are matched to automatically pull the bolt out of the bolt hole of the puncture guide needle when the puncture is in place, the puncture is in place and the needle release is synchronously completed, the manual needle release operation is omitted, and meanwhile, the reliability is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below with reference to fig. 1-2, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts.

FIG. 1 is a front view of a slider and a guide pin mechanism of a fine adjustment mechanism provided in the present invention;

fig. 2 is a cross-sectional view a-a of fig. 1 in accordance with the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to fig. 1-2, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in FIGS. 1-2, the biopsy needle machine of the present invention includes a needle guide mechanism 1 to which a needle guide 10 is mountable. The guide pin mechanism 1 can be installed on a positioning device for use, the puncture point mark and the needle inserting angle adjustment on the body of a patient can be aligned through the positioning device, the needle inserting depth can be controlled through the guide pin mechanism 1, and the needle inserting depth can also be adjusted and controlled through the positioning device.

As shown in fig. 1-2, the needle guide mechanism 1 of the present invention includes a guide rod 11, a mounting seat 12 for mounting the puncture guide needle 10, and a latch 13 for fixing the puncture guide needle 10 on the mounting seat 12, wherein the guide rod 11 is provided with a guide chute 110 slidably engaged with the mounting seat 12, an elastic member 14 for restoring the latch 13 is provided between the latch 13 and the mounting seat 12, and the puncture guide needle 10 is provided with a first latch hole engaged with the latch 13. During assembly, the latch 13 is pulled apart, the puncture guide needle 10 is mounted on the mounting seat 12, the first latch hole of the puncture guide needle 10 is aligned with the latch 13, then the latch 13 is loosened, and the latch 13 is reset under the action of the elastic piece 14 and is clamped into the first latch hole of the puncture guide needle 10, so that the puncture guide needle 10 is fixed on the mounting seat 12. The needle guide mechanism is simple in structure, only the plug pin needs to be inserted and pulled for needle installation and needle removal, operation is simple, misoperation is avoided, use safety is improved, meanwhile, the plug pin fixes the puncture guide needle, assembling stability and reliability of the puncture guide needle are improved, the puncture guide needle is prevented from being deviated in the puncture process, and puncture precision is improved.

Specifically, the mounting seat 12 of the present invention includes a push rod 124 for pushing the mounting seat 12 by hand, a guide slider 121 for mounting the puncture guide needle 10, and a bracket 122 for mounting the latch 13, wherein the push rod 124 is connected to the guide slider 121 of the mounting seat 12, and the guide slider 121 of the mounting seat 12 is matched with the guide chute 110 and can slide along the guide chute 110. The head end of the guide slider 121 is provided with a first mounting hole matched with the tail end of the puncture guide needle 10, the guide slider 121 is further provided with a second plug pin hole matched with the plug pin 13, the first mounting hole is communicated with the second plug pin hole, and when the tail end of the puncture guide needle 10 is inserted into the first mounting hole, the first plug pin hole of the puncture guide needle 10 is aligned with the second plug pin hole of the guide slider 121. In this embodiment, the mounting position of the puncture guiding needle 10 on the guiding slider 121 coincides with the limiting position of the latch 13, and the structural design of this embodiment makes the components more compact and concentrated, facilitates miniaturization and simplified design, and locks the puncture guiding needle 10 more firmly and reliably. Of course, the mounting position of the puncture guide needle 10 on the guide slider 121 and the limit position of the latch 13 may be misaligned, for example, a latch hole of the puncture guide needle 10 is exposed outside the guide slider 121, and the latch 13 is inserted into the latch hole of the puncture guide needle 10 and is locked outside the mounting hole of the puncture guide needle 10 on the guide slider 121, so that the puncture guide needle 10 is fixed on the guide slider 121.

Furthermore, a convex unlocking piece 15 is arranged at the head end of the guide rod 11, and the convex direction of the unlocking piece 15 is consistent with the axial direction of the bolt 13; the bolt 13 is provided with a convex unlocking part 131, the protruding direction of the unlocking part 131 is perpendicular to the axial direction of the bolt 13, and the unlocking part 131 is matched with the unlocking piece 15. When latch 13 moves to unlocking unit 15 to lift unlocking unit 131 of latch 13, latch 13 is lifted and separated from first latch hole of puncture guide needle 10, thereby unlocking puncture guide needle 10 from mounting seat 12. Specifically, the unlocking piece 15 has an unlocking step 150, a mounting collar 151 and a fastener 152, the unlocking step 150 is provided with a guide inclined plane 1501, a transition plane 1502 and a stop arc surface 1503 which are connected in sequence, and the unlocking part 131 of the bolt 13 is a circular wheel matched with the stop arc surface 1503 of the unlocking piece 15. When the unlocking portion 131 of the latch 13 moves to sequentially pass through the guiding inclined surface 1501, the transition plane 1502 and the stop circular arc surface 1503 of the unlocking member 15, the latch 13 is disengaged from the first latch hole of the puncture guide needle 10. The unlocking piece is matched with the unlocking part of the bolt to realize that the bolt is automatically pulled out of the bolt hole of the puncture guide needle when the puncture is in place, the puncture is in place and the needle release is synchronously completed, the manual needle release operation is omitted, and meanwhile, the reliability is improved. The structural design of the unlocking piece enables the plug pin to be synchronously and slowly lifted in the needle inserting process, the needle releasing action is smooth and smooth, and the displacement phenomenon is effectively avoided.

Preferably, the guide pin mechanism 1 further comprises a buffer lantern ring 16 detachably sleeved on the head end port of the guide rod 11, and the buffer lantern ring 16 is made of flexible materials and plays a role in buffering to avoid crushing the patient. The guide pin mechanism 1 further comprises a positioning sleeve ring 17 detachably sleeved on the puncture guide needle 10, and the position of the positioning sleeve ring 17 is observed through an observation slot on the front surface of the guide rod 11 and is used for indicating and judging the needle insertion depth of the puncture guide needle.

As shown in fig. 1-2, one end of the bracket 122 is fixed on the guide slider 121, and the other end is provided with a second mounting hole for mounting the bolt 13, and the bolt 13 is inserted into the second mounting hole and can slide along the second mounting hole; the elastic member 14 is connected between the bracket 122 of the mounting seat 12 and the latch 13.

Specifically, the bracket 122 of the present invention is an integrally formed Z-shaped block, and includes a first mounting portion, a connecting portion, and a second mounting portion, which are connected in sequence, where the connecting portion of the bracket 122 is parallel to the axial direction of the plug 13 and perpendicular to the first mounting portion and the second mounting portion, the first mounting portion of the bracket 122 is fixed on the guide slider 121, and the second mounting portion of the bracket 122 is provided with the second mounting hole. In addition, the mounting base 12 further includes a protection cover 123, the protection cover 123 covers the connecting portion and the second mounting portion of the bolt 13, the elastic member 14, and the bracket 122, the protection cover 123 is further provided with a third mounting hole matched with the bolt 13, and is aligned with the second mounting hole of the bracket 122. Preferably, the elastic member 14 is a spring. The spring is sleeved on the bolt 13, one end of the spring is connected to the second mounting part of the bracket 122, and the other end of the spring is connected to a middle bulge of the bolt 13; one end of the bolt 13 is inserted into the second bolt hole of the guide sliding block 121, the other end of the bolt sequentially penetrates through the second mounting hole of the support 122 and the third mounting hole of the protection cover 123, and the penetrating part is provided with an end head in limit fit with the protection cover 123, so that the bolt 13 is prevented from entering the protection cover 123.

During the working process of the guide pin mechanism, firstly, the bolt 13 is pulled open, the tail end of the puncture guide pin 10 is inserted into the first mounting hole of the guide slider 121, at the moment, the bolt 13 is aligned with the second bolt hole of the guide slider 121 and the first bolt hole of the puncture guide pin 10, then the bolt 13 is loosened, and the bolt 13 is reset under the action of the elastic piece 14 and is clamped into the second bolt hole of the guide slider 121 and the first bolt hole of the puncture guide pin 10 to lock the puncture guide pin 10 on the mounting seat 12.

Then, the push rod 124 is held by hand to push the guide slider 121 to move forward along the guide sliding groove 110 until the unlocking piece 15 of the bolt 13 abuts against the stop arc surface 1503 of the unlocking part 131, the bolt 13 is lifted and separated from the first bolt hole of the puncture guide needle 10, the puncture is synchronously completed in place and needle release, the needle guide mechanism 1 retracts, and the puncture guide needle 10 is left on the body of the patient; when sampling is needed, the puncture needle can be used to directly support the sampling point through the puncture guiding needle 10, and the sampling can be repeated.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied without departing from the spirit or scope of the utility model.

Claims

1. A guide pin mechanism, its characterized in that: the puncture guiding needle comprises a guiding rod (11), a mounting seat (12) and a plug pin (13), wherein the guiding rod (11) is provided with a guiding sliding chute (110) in sliding fit with the mounting seat (12), an elastic piece (14) is arranged between the plug pin (13) and the mounting seat (12), and a first plug pin hole matched with the plug pin (13) is formed in the puncture guiding needle (10); when the puncture guiding needle is assembled, the puncture guiding needle (10) is installed on the installation seat (12), a first bolt hole of the puncture guiding needle (10) is aligned with the bolt (13), and the bolt (13) is inserted into the first bolt hole under the action of the elastic piece (14) to fix the puncture guiding needle (10) on the installation seat (12).

2. The needle guide mechanism of claim 1, wherein: the mounting seat (12) comprises a guide sliding block (121) which is in sliding fit with the guide sliding groove (110), a first mounting hole which is matched with the tail end of the puncture guide needle (10) is formed in the head end of the guide sliding block (121), a second plug pin hole which is matched with the plug pin (13) is further formed in the guide sliding block (121), the first mounting hole is communicated with the second plug pin hole, and when the tail end of the puncture guide needle (10) is inserted into the first mounting hole, the first plug pin hole of the puncture guide needle (10) is aligned with the second plug pin hole of the guide sliding block (121).

3. The needle guide mechanism of claim 1, wherein: an unlocking piece (15) is arranged at the head end of the guide rod (11), and an unlocking part (131) matched with the unlocking piece (15) is arranged on the bolt (13); when the latch (13) moves to the unlocking piece (15) to lift the unlocking part (131) of the latch (13), the latch (13) is separated from the first latch hole of the puncture guide needle (10).

4. The needle guide mechanism of claim 3, wherein: unlocking piece (15) have unblock step (150), unblock step (150) are equipped with consecutive guide inclined plane (1501), transition plane (1502) and end a circular arc face (1503), unblock portion (131) of bolt (13) are for ending a circular arc face (1503) matched with round wheel with unlocking piece (15).

5. The needle guide mechanism of claim 1, wherein: the device also comprises a buffer lantern ring (16) sleeved on the head end port of the guide rod (11).

6. The needle guide mechanism of claim 1, wherein: also comprises a positioning lantern ring (17) sleeved on the puncture guide needle (10).

7. The needle guide mechanism of any of claims 1-6, wherein: the mounting seat (12) comprises a guide sliding block (121) and a support (122), and the guide sliding block (121) of the mounting seat (12) is in sliding fit with the guide sliding groove (110); one end of the support (122) is fixed on the guide sliding block (121), a second mounting hole for mounting the bolt (13) is formed in the other end of the support, and the bolt (13) is inserted into the second mounting hole and can slide along the second mounting hole; the elastic piece (14) is connected between the bracket (122) of the mounting seat (12) and the bolt (13).

8. The needle guide mechanism of claim 7, wherein: the elastic piece (14) is a spring, the spring is sleeved on the bolt (13), one end of the spring is connected to the support (122), and the other end of the spring is connected to the bolt (13).

9. The needle guide mechanism of claim 7, wherein: support (122) are including consecutive first installation department, connecting portion and second installation department, the connecting portion of support (122) and the axial direction parallel of bolt (13) to it is perpendicular with first installation department, second installation department, wherein the first installation department of support (122) is fixed on direction slider (121), be equipped with on the second installation department of support (122) the second mounting hole.

10. The utility model provides a biopsy puncture appearance which characterized in that: including the needle guide mechanism of any of claims 1-9.