CN113040882A - Linkage assembly of full-automatic puncture needle and full-automatic puncture needle - Google Patents

Abstract

The invention relates to the technical field of puncture equipment, in particular to a linkage assembly of a full-automatic puncture needle and the full-automatic puncture needle, wherein the linkage assembly comprises a linkage rod, a trigger receiving block and a trigger linkage block, wherein the trigger receiving block and the trigger linkage block are connected with the linkage rod; the trigger receiving block and the trigger linkage block respectively protrude out of the side surface of the linkage rod, and projections of the trigger receiving block and the trigger linkage block along the length direction of the linkage rod comprise non-overlapping parts. According to the technical scheme provided by the invention, the trigger receiving block is arranged on the stroke line of the inner needle base, when the inner needle base is excited, the inner needle base can abut against the trigger receiving block in the moving process, so that the linkage rod is driven to move, the trigger linkage block and the linkage rod move synchronously, the trigger linkage block abuts against the outer needle base in the moving process, and the outer needle base is excited, so that the structure of the product is simpler. In addition, an avoiding groove for accommodating the gear compensation block can be further arranged on the linkage rod, so that the linkage assembly is adaptive to the puncture needle capable of shifting gears.

Description

Linkage assembly of full-automatic puncture needle and full-automatic puncture needle

Technical Field

The invention relates to the technical field of puncture equipment, in particular to a linkage assembly of a full-automatic puncture needle and the full-automatic puncture needle.

Background

The method is characterized in that a puncture needle is guided to a target position of a human body under ultrasonic guidance to realize cytological biopsy, histological biopsy, cyst suction, treatment and the like, and is an important disease monitoring and treating means at present. The puncture needle is an important tool in the ultrasonic guided surgery, the structure of an inner needle and an outer needle is generally adopted in the puncture needle for biopsy at present, when the puncture needle is used, the inner needle is triggered to puncture a target area firstly, then the outer needle is triggered to puncture along with the inner needle, a part of tissue of the target area is cut off through shearing of the needle head of the inner needle and the needle head of the outer needle, and the cut tissue is placed in a containing cavity at the end part of the needle head of the inner needle and is taken out along with the pulling of the puncture needle for biopsy.

During the puncture operation, the inner needle and the outer needle need to be inserted into the focus in sequence to achieve the purpose of cutting the tissue. For the sequential triggering of the inner needle and the outer needle, a simpler mode is to arrange two excitation buttons on the puncture needle for respectively exciting the inner needle and the outer needle, and the mode can lead the structure of the puncture needle to be complex and increase the probability of false triggering; the other is a linkage excitation mode, namely the puncture frame comprises an excitation button which is used for exciting the inner needle, and then the inner linkage component excites the outer needle, so that the aim of exciting the inner needle and the outer needle at intervals is fulfilled.

However, the existing linkage assembly has a complex structure and a poor linkage excitation effect, and the situation that the outer needle cannot be smoothly excited may occur, and in addition, the linkage assembly cannot be applied to a multi-range puncture needle, that is, after the ranges of the inner needle and the outer needle are shortened, the inner needle base cannot smoothly touch the linkage assembly, so that the outer needle cannot be excited.

Disclosure of Invention

The invention provides a linkage assembly of a full-automatic puncture needle and the full-automatic puncture needle, wherein the linkage assembly adopts a rod-shaped structure, so that the product structure is simpler under the condition of ensuring linkage excitation; meanwhile, the linkage assembly has expandability and can be compatible with the adaptive gear shifting assembly for use.

In one aspect of the invention, a linkage assembly of a full-automatic puncture needle is provided, which comprises a linkage rod, a trigger receiving block and a trigger linkage block, wherein the trigger receiving block and the trigger linkage block are connected with the linkage rod; the trigger receiving block and the trigger linkage block respectively protrude out of the side surface of the linkage rod, and projections of the trigger receiving block and the trigger linkage block along the length direction of the linkage rod comprise non-overlapping parts.

Optionally, the trigger receiving block is disposed at a first end of the linkage rod, and the trigger linkage block is disposed at a second end of the linkage rod.

Optionally, the trigger receiving block comprises an abutment surface for abutting the inner needle mount; the trigger linkage block comprises a trigger inclined plane for pushing the outer needle base.

Optionally, the linkage rod is rectangular, the trigger receiving block is located on a first side surface of a first end of the linkage rod, the trigger linkage block is located on a second side surface of a second end of the linkage rod, and the first side surface and the second side surface are adjacent surfaces.

Optionally, the device further comprises a guide block connected with the connecting rod guide groove of the puncture needle, and the guide block is fixedly connected with the linkage rod.

Optionally, the guide block is strip-shaped and is located on a third side face of the first end of the linkage rod, the third side face and the first side face are opposite faces, and the length direction of the guide block is parallel to the length direction of the linkage rod.

Optionally, the gear position compensating block further comprises an avoiding groove used for connecting the gear position compensating block.

Optionally, the avoidance slot is located between the trigger receiving block and the trigger linkage block and at the first side surface.

Optionally, one side of the trigger linkage block, which is far away from the linkage rod, is provided with an extension part extending along the length direction of the linkage rod.

In another aspect of the invention, a full-automatic puncture needle is also provided, which comprises an inner needle assembly, an outer needle assembly and a linkage assembly of the full-automatic puncture needle; the inner needle assembly comprises an inner needle seat, the outer needle assembly comprises an outer needle seat, the inner needle seat is abutted to the triggering receiving block after being excited and drives the linkage rod to move, and the triggering linkage block and the linkage rod synchronously move and drive the outer needle seat to be excited.

According to the technical scheme provided by the invention, the trigger receiving block is arranged on the stroke line of the inner needle base, when the inner needle base is excited, the inner needle base can abut against the trigger receiving block in the moving process, so that the linkage rod is driven to move, the trigger linkage block and the linkage rod move synchronously, the trigger linkage block abuts against the outer needle base in the moving process, and the outer needle base is excited, so that the structure of the product is simpler. In addition, an avoiding groove for accommodating the gear compensation block can be further arranged on the linkage rod, so that the linkage assembly is adaptive to the puncture needle capable of shifting gears.

Drawings

For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a fully automatic lancet provided in an embodiment of the present invention;

FIG. 2 is a front view of a fully automatic lancet provided in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention;

fig. 4 is an exploded view of a fully automatic needle according to an embodiment of the present invention;

FIG. 5 is a schematic view showing the structure of the inner housing of the fully automatic puncture needle according to the embodiment of the present invention;

FIG. 6 is a front view of the front end of the inner housing of the fully automatic puncture needle according to the embodiment of the present invention;

FIG. 7 is a schematic structural view of a backstop in the fully automatic lancet provided in the embodiment of the present invention;

FIG. 8 is a top view of the inner housing of the fully automatic lancet provided in accordance with an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken at "A-A" in FIG. 8;

FIG. 10 is a schematic structural diagram of a linkage rod in the fully automatic puncture needle according to the embodiment of the present invention;

FIG. 11 is a schematic view of the configuration of an adjustment block in the fully automatic puncture needle according to the embodiment of the present invention;

fig. 12 is a schematic structural view of another view angle of the shift block in the fully automatic puncture needle according to the embodiment of the present invention;

FIG. 13 is a schematic structural view of a winding button in the fully automatic puncture needle according to the embodiment of the present invention;

fig. 14 is a schematic structural view of an outer needle holder in the full-automatic puncture needle provided by the embodiment of the invention;

FIG. 15 is a front elevational view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing;

FIG. 16 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing;

FIG. 17 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing;

FIG. 18 is a cross-sectional view of a fully automatic lancet in the first gear state with no sheath in accordance with an embodiment of the present invention;

fig. 19 is a sectional view showing a second stop state in the case where the puncture needle is not covered with the sheath in the fully automatic puncture needle according to the embodiment of the present invention.

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present application. For the sake of brevity, the same or similar reference numerals are used for the same or similar apparatus/method steps in the description of the various embodiments of the present application.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

FIG. 1 is a schematic structural view of a fully automatic lancet provided in an embodiment of the present invention; FIG. 2 is a front view of a fully automatic lancet provided in accordance with an embodiment of the present invention; FIG. 3 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention; fig. 4 is an exploded view of the fully automatic puncture needle according to the embodiment of the present invention. As shown in fig. 1 to 4, the fully automatic puncture needle comprises an outer shell, an inner needle assembly, an outer needle assembly, a linkage assembly for linkage triggering the inner needle assembly and the outer needle assembly, and a gear shifting assembly for adjusting the range gears of the inner needle assembly and the outer needle assembly.

The components of the fully automatic puncture needle will be described in detail with reference to the accompanying drawings, wherein, when describing the positions of the components, the needle tip is taken as the front, and the side of the outer shell with the trigger button is taken as the upper side.

FIG. 5 is a schematic view showing the structure of the inner housing of the fully automatic puncture needle according to the embodiment of the present invention;

FIG. 6 is a front view of the front end of the inner housing of the fully automatic puncture needle according to the embodiment of the present invention; FIG. 7 is a schematic structural view of a backstop in the fully automatic lancet provided in the embodiment of the present invention; FIG. 8 is a top view of the inner housing of the fully automatic lancet provided in accordance with an embodiment of the present invention; fig. 9 is a cross-sectional view taken at "a-a" in fig. 8. As shown in fig. 1 to 9, the inner needle assembly includes an inner needle 1a, an inner needle holder 4a to which the inner needle 1a is fixed, an inner needle holder guide rod 3a, and an inner needle holder spring 2 a. The inner needle holder 4a is provided with an inner needle holder locking hook 4a1 which can be locked or unlocked with a locking block 9f of the inner housing 9, and a guide hole (not shown) through which the inner needle holder guide rod 3a passes, and an inner needle button connecting seat 4a3 for connecting an inner needle winding button 5a is fixedly provided at the front end of the inner needle holder 4 a. The inner needle seat spring 2a penetrates through the inner needle seat guide rod 3a, and two ends of the inner needle seat spring are respectively abutted against the inner needle seat 4a and the rear stop block 9 e.

Fig. 14 is a schematic structural view of an outer needle holder in the fully automatic puncture needle provided by the embodiment of the invention. As shown in fig. 1 to 9, and 14, the outer needle assembly includes an outer needle 1b, an outer hub 4b to which the outer needle 1b is fixed, an outer hub guide rod 3b, and an outer hub spring 2 b. The outer needle holder 4b is provided with an outer needle holder locking hook 4b1 which can be locked or unlocked with the locking block 9f of the inner housing 9, and a guide hole (not shown) for the outer needle holder guide rod 3b to pass through, and the front end of the outer needle holder 4b is fixedly provided with an outer needle button connecting seat 4b3 for connecting the outer needle winding button 5 b. The outer needle seat spring 2b is arranged on the outer needle seat guide rod 3b in a penetrating way, and two ends of the outer needle seat spring are respectively propped against the outer needle seat 4b and the rear stop block 9 e.

Fig. 10 is a schematic structural diagram of a linkage rod in the fully automatic puncture needle according to the embodiment of the present invention. As shown in fig. 10, the linkage assembly includes a linkage rod 8, a link guide block 8a, a trigger receiving block 8b, a trigger linkage block 8c, and an escape groove 8 d. Wherein, the connecting rod guide block 8a is arranged in the connecting rod guide groove on the outer shell in a sliding way. Trigger receiving block 8b includes abutment surface 8b1 for receiving the impact of the inner needle trigger block on inner needle hub 4a and causing the linkage assembly to be moved concomitantly by inner needle hub 4 a. When the linkage assembly is driven by the inner needle seat 4a, the trigger inclined surface 8c1 of the trigger linkage block 8c strikes the outer needle seat locking hook 4b1 and enables the outer needle seat locking hook to fall off from the locking block 9f of the inner shell 9 for unlocking, so that the outer needle seat 4b is triggered, and the outer needle 1b is ejected under the action of the outer needle seat spring 2 b. Thereby realizing that the outer needle 1b and the outer needle seat 4b are ejected along with the ejection after the inner needle 1a and the inner needle seat 4a are ejected. During the operation of ejecting the inner needle 1a and the outer needle 1b one after another, a piece of tissue is removed from the target site by cutting the ends of the inner needle 1a and the outer needle 1b, and stored in the storing groove 1a1 at the end of the inner needle 1a (the outer needle 1b can be removed after being pushed down). The avoidance groove 8d in the linkage assembly is used for avoiding the cushion block 12 in the gear shifting assembly, and the specific avoidance mode refers to the following description.

Fig. 11 is a schematic structural view of a shift block in the fully automatic puncture needle according to the embodiment of the present invention;

fig. 12 is a schematic structural view of another view angle of the shift block in the fully automatic puncture needle according to the embodiment of the present invention. As shown in fig. 11 and 12, the gearshift assembly includes a gearshift block 10, a handle 11, and a pad 12 that slide left and right within the inner housing 9.

In the embodiment of the present invention, two blocking surfaces, i.e., a first blocking surface 10a and a second blocking surface 10b, are taken as an example. FIG. 15 is a front elevational view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing; FIG. 16 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing; FIG. 17 is a cross-sectional view of a fully automatic lancet provided in accordance with an embodiment of the present invention without a housing; FIG. 18 is a cross-sectional view of a fully automatic lancet in the first gear state with no sheath in accordance with an embodiment of the present invention; fig. 19 is a sectional view showing a second stop state in the case where the puncture needle is not covered with the sheath in the fully automatic puncture needle according to the embodiment of the present invention. As shown in fig. 15 to 19, the shift block 10 has two first blocking surfaces 10a and two second blocking surfaces 10b, and according to the left and right sliding of the shift block 10, the inner needle holder 4a and the outer needle holder 4b can selectively collide with the first blocking surfaces 10a or the second blocking surfaces 10b after being triggered (the abutting ends of the inner needle holder 4a and the outer needle holder 4b collide with the first blocking surfaces 10a or the second blocking surfaces 10 b). In the embodiment of the present invention, the inner needle holder 4a and the outer needle holder 4b move a large distance when they collide with the first blocking surface 10a, that is, the range of the inner needle 1a and the outer needle 1b is long, and the inner needle holder 4a and the outer needle holder 4b move a small distance when they collide with the second blocking surface 10b, that is, the range of the inner needle 1a and the outer needle 1b is short.

With continued reference to fig. 15-19, and 5-9, the handles 11 are shown disposed on the left and right sides of the shift block 10 and extend beyond the inner and outer housings for manually adjusting the position of the shift block 10 to effect adjustment of the gears. The handle 11 extends out of the housing part as a round bar, and the handle 11 on each side has two recesses 11a, and the recesses 11a are used for locking after shifting. The gear shifting positioning block 9j on the inner shell 9 corresponds to the groove 11a, the gear shifting positioning block 9j on the inner shell 9 is clamped on the round rod of the handle 11 when the handle 11 moves, and when the gear shifting positioning block 9j slides into the groove 11a from the round rod, the gear shifting positioning block impacts the groove 11a to generate impact sound to prompt that gear shifting is completed.

As shown in fig. 11 and 12, the shift block 10 is further provided with a cushion block 12, and is fixedly connected with the shift block 10 through an elastic rod, when the shift operation is performed, the cushion block 12 slides left and right along with the shift block 10, and when the shift block 10 is at the second gear, the cushion block 12 slides to between the trigger receiving block 8b of the linkage assembly and the inner needle holder 4 a. Because the moving distance between the inner needle seat 4a and the outer needle seat 4b is small when the second gear is in the second gear, the inner needle seat 4a cannot excite the linkage assembly after being triggered (the inner needle seat 4a is not in contact with the linkage assembly due to the fact that the moving distance is shortened), and then the outer needle seat 4b cannot be excited. In the embodiment of the invention, the cushion block 12 is used for compensating the reduction of the moving distance of the inner needle seat 4a of the second stop, and after the cushion block 12 is arranged, the gear shifting block 10 can also successfully excite the outer needle seat 4b under the second stop. The thickness of the pad 12 is determined by the distance between the first stop surface 10a and the second stop surface 10 b.

As shown in fig. 5 to 9, the inner housing 9 includes a base plate 9a, a needle groove 9b, a side plate 9c, a front stopper 9d, a rear stopper 9e, a locking block 9f, an inner needle locking ridge 9g, an outer needle locking ridge 9h, a shift chute 9i, a shift positioning block 9j, an upper chord button slide rail 9k, a front locking buckle 9l, and a housing locking buckle 9 m. The needle groove 9b is located at the middle of the upper surface of the base plate 9a for the inner needle 1a and the outer needle 1b to pass through. The side plates 9c are fixedly provided at both sides of the base plate 9a for protecting and supporting components of the inner case 9. The front stop 9d is fixedly arranged at the front part of the two side plates 9c and is mainly used for forming an upper chord button slide rail 9k together with the base plate 9 a. In addition, it has a needle hole 9d1 communicating with the needle groove 9b, a link guide groove 9d2 for guiding the link guide block 8a, and two fixing holes 9d3 for respectively engaging the inner hub guide rod 3a and the outer hub guide rod 3 b.

With continued reference to fig. 5 to 9, as shown in the drawings, the rear block 9e is clamped in the clamping groove at the rear of the base plate 9a and the side plate 9c by the bottom and two side protrusions 9e1, and the rear block 9e has two spring grooves 9e2 for supporting springs. In addition, the rear stop 9e is provided with a supporting platform 9e3, one side of the trigger linkage block 8c, which is far away from the linkage rod 8, is provided with an extension portion 8e extending along the length direction of the linkage rod 8, and the supporting platform 9e3 is used for supporting the rear end portion of the extension portion 8e, and as the connecting rod guide block 8a on the linkage rod 8 is shorter in length and is located at the front end portion, the supporting platform 9e3 used for supporting the rear end portion of the extension portion 8e is arranged at the rear end portion. The locking block 9f is fixed and transversely arranged between the two side plates 9c, an inner needle locking edge 9g for hanging the locking hook on the inner needle seat 4a and an outer needle locking edge 9h for hanging the locking hook on the outer needle seat 4b are arranged on the locking block, a second guide groove 9f1 for guiding the linkage rod 8 is arranged on the lower surface of the middle part of the locking block 9f, and the second guide groove 9f1 limits the left direction, the right direction and the upper direction of the linkage rod 8. The locking block 9f is further provided with a guide surface 9f2 horizontally extending towards the rear part, and the guide surface 9f2 is used for abutting against the trigger inclined surface 8c1 on the linkage lever 8 to play a guiding role, so that the trigger inclined surface 8c1 can be prevented from touching other structures and being clamped.

The shift positioning block 9j is used for clamping the handle 11 of the shift assembly, and when the shift positioning block 9j slides into the groove 11a from the round rod of the handle 11 (refer to fig. 11 and 12), the shift positioning block impacts on the groove 11a to generate impact sound, so that the completion of the shift is prompted. The gear shifting positioning block 9j is only arranged in the gear shifting sliding groove 9i on one side, so that the gear shifting positioning block impacts different parts of the handle 11 when adjusted to different gears, different sounds are emitted, and the distinguishing degree of the gears is increased. The front locking buckle 9l is provided with two projections on the lower surface of the front part of the base plate 9a for locking the front fixing sleeve 6 clamped on the front part of the inner housing 9 to prevent it from falling off. The shell locking buckle 9m is arranged on the side plate 9c and used for locking the rear fixing sleeve 7 sleeved outside the inner shell 9, so that the rear fixing sleeve 7 is convenient to disassemble and assemble, and the shell locking buckle 9m comprises a boss protruding towards the outside and an elastic connecting rod capable of increasing the elastic deformation capacity of the boss.

Fig. 13 is a schematic structural diagram of a winding button in the fully automatic puncture needle according to the embodiment of the invention. As shown in fig. 1 to 4, 13 and 14, the outer housing comprises a front hub 6, a rear hub 7, an inner needle winding button 5a and an outer needle winding button 5 b. The front fixing sleeve 6 is provided with a clamping groove clamped with the base plate 9a, and is mutually locked with the base plate 9a through a front locking buckle 9 l. The front fixing sleeve 6 is provided with a guide ring 6a for passing the inner needle winding button 5a and the outer needle winding button 5 b. The rear fixing sleeve 7 is sleeved outside the inner shell 9 from the rear part of the inner shell 9 and is used for protecting the inner shell 9 and inner components thereof. Two sides of the rear fixing sleeve 7 are provided with locking holes which are mutually matched with the shell locking buckles 9m, the rear fixing sleeve 7 is also provided with a trigger button 7a, when the locking holes are mutually matched and locked with the shell locking buckles 9m, the trigger button 7a is positioned above the inner needle seat locking hooks 4a1 of the inner needle seat 4a after winding, and after the trigger button 7a is pressed down, the trigger button 7a pushes the inner needle seat locking hooks 4a1 to be separated from the inner needle locking edges 9g on the locking blocks 9f, so that the inner needle seat 4a is triggered and is ejected under the action of the inner needle seat spring 2 a.

The rear fixing sleeve 7 is provided with a through hole in the area corresponding to the handle 11 on the gear shifting block 10, the diameter of the through hole is larger than that of the end part of the handle 11, and the handle 11 can be completely immersed in the through hole on the rear fixing sleeve 7 when clinging to the inner shell 9. In addition, an operating hand position 111 is provided at an end portion of the handle 11, and the diameter of the operating hand position is larger than that of the through hole, and if a circular plate structure is adopted, the operating hand position can be further used for limiting. In the embodiment of the invention, the gear block 10 comprises two gears during adjustment, two handles 11 are arranged on the gear block 10, when the gear block 10 is positioned at the first gear during gear adjustment operation, the operating hand position at one side is attached to the outer wall of the rear fixing sleeve 7, and when the gear block is positioned at the second gear, the operating hand position at the other side is attached to the outer wall of the rear fixing sleeve 7.

With continued reference to fig. 1 to 4, 13 and 14, as shown in the figures, the rear pouch 7 is provided with a half-turn raised rib 7b on the outer periphery of the trigger button 7a, the height of the rib 7b is slightly higher than the height of the pouch 7 after the trigger button 7a protrudes, and the rib 7b is located in front of the trigger button 7 a. When the hand grips the outer shell again, the fingers (especially the thumb) are easy to slide from front to back (when the doctor operates the puncture needle, different hand-holding positions may need to be switched, the fingers slide very frequently), and the trigger button 7a is very easy to touch to cause false triggering, so that the edge part 7b arranged on the trigger button 7a can effectively block the occurrence of false triggering, and the safety performance of the puncture needle in use is ensured.

Inner needle winding button 5a has inner needle pressing surface 5a1, inner needle button connecting post 5a2 and inner needle button guiding post 5a3 engaged with inner needle button connecting seat 4a 3. When the inner needle button connecting seat 4a3 and the inner needle button connecting post 5a2 are clamped, a complete column is formed, and the column can slide in the upper chord button sliding rail 9 k. The inner needle button guide post 5a3 is slidably disposed in the gap between the guide ring 6a and the front stop 9d to maintain stability. The inner needle button connecting post 5a2 and the inner needle button guiding post 5a3 are respectively arranged at the upper end and the lower end of the inner needle winding button 5a, so as to improve the stability when the inner needle winding button 5a is pressed. The outer needle winding button 5b comprises an outer needle pressing surface 5b1, an outer needle button connecting column 5b2 and an outer needle button guiding column 5b3, and the outer needle winding button 5b and the inner needle winding button 5a are symmetrical with each other about the axis, so that the details are omitted. Wherein, the inner needle pressing surface 5a1 and the outer needle pressing surface 5b1 are further provided with pressing threads or indicating labels, or pressing threads with indicating function, the indicating labels can be marked with (i) and (ii) and the like, and play a role of reminding the operation sequence and increasing the friction of the pressing threads.

The full-automatic puncture needle provided by the embodiment of the invention has the following puncture operations:

manually pressing the inner needle upper chord button 5a to make the inner needle seat locking hook 4a1 of the inner needle seat 4a hang on the inner needle locking ridge 9g to realize the locking of the inner needle; the outer needle upper chord button 5b is manually pressed, so that the outer needle seat locking hook 4b1 of the outer needle seat 4b is hung on the outer needle locking ridge 9h to realize the locking of the outer needle. After the winding operation is finished, the inner needle and the outer needle are respectively in a state to be excited.

The gear shifting assembly is adjusted according to the puncture requirement, namely the handle 11 is pushed, the gear shifting block 10 is moved and adjusted to the required gear (the gear can be adjusted only when the inner needle and the outer needle are both in the winding state).

Under the assistance of ultrasonic equipment, the inner needle 1a and the outer needle 1b are aligned to a target position of a patient, the trigger button 7a is pressed, the trigger button 7a pushes the inner needle seat locking hook 4a1 to be separated from the inner needle locking edge 9g on the locking block 9f, so that the inner needle seat 4a is triggered and ejected under the action of the inner needle seat spring 2a until the inner needle seat 4a is collided on the gear shifting block 10 to stop, and in the process, the inner needle 1a is synchronously pushed out and stopped along with the inner needle seat 4a, and a puncture process of the inner needle is completed. When the gear shifting block 10 is in the first gear, the inner needle seat 4a is triggered and then collides with the trigger receiving block 8b of the linkage rod 8 before moving to the first blocking surface 10a, the linkage rod 8 drives the trigger inclined surface 8c1 on the linkage rod 8 to collide with the outer needle seat locking hook 4b1, so that the outer needle seat locking hook 4b1 moves downwards to be unhooked from the outer needle locking rib 9h, the outer needle seat 4b is triggered to be ejected under the action of the outer needle seat spring 2b until the outer needle seat 4b collides with the gear shifting block 10 to stop, and in the process, the outer needle 1b is synchronously ejected and stopped along with the outer needle seat 4b, and a puncturing process of the outer needle is completed. When the gear shifting block 10 is in the second gear, the stroke of the inner needle seat 4a after being triggered is shortened, and the inner needle seat cannot touch the receiving block 8b, however, the cushion block 12 just passes through the avoiding groove 8d after moving along with the gear shifting block 10 and is blocked in front of the receiving block 8b, the inner needle seat 4a can firstly impact on the cushion block 12, and then power is transmitted to the receiving block 8b through the cushion block 12, so that the triggering of the outer needle 1b is completed. At the time of puncture, a piece of tissue stored in the storing groove 1a1 at the end of the inner needle 1a is removed at the target site by shearing the ends of the inner needle 1a and the outer needle 1 b.

The outer needle upper chord button 5b is pressed again, so that the outer needle seat locking hook 4b1 of the outer needle seat 4b is hung on the outer needle locking ridge 9h to realize the locking of the outer needle. At this time, the storing groove 1a1 at the end of the inner needle 1a is exposed, and the tissue can be taken out from the storing groove 1a 1. Then, the outer needle 1b is released again, again by shearing of the ends of the inner needle 1a and the outer needle 1 b.

The above steps are repeated a number of times until a sufficient biopsy sample is obtained.

According to the embodiment provided by the invention, the inner needle assembly and the outer needle assembly can stop moving within a limited stroke by blocking the inner needle assembly and the outer needle assembly by the blocking surface on the gear shifting structure, wherein a plurality of sets of gear shifting structures are arranged on the gear shifting block, and the inner needle assembly and the outer needle assembly can be switched to different stroke distances by switching different gear shifting structures, so that the puncture depths of the inner needle and the outer needle can be switched, and the purpose of shifting the puncture needle is achieved. The gear shifting assembly has the advantages of simple structure, convenience in regulation and control and the like, and the design and production cost of the puncture needle can be reduced.

The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A linkage assembly of a full-automatic puncture needle is characterized by comprising a linkage rod (8), a trigger receiving block (8b) and a trigger linkage block (8c), wherein the trigger receiving block (8b) and the trigger linkage block (8c) are connected with the linkage rod (8);

the trigger receiving block (8b) and the trigger linkage block (8c) respectively protrude out of the side surface of the linkage rod (8), and the projections of the trigger receiving block (8b) and the trigger linkage block (8c) along the length direction of the linkage rod (8) comprise non-overlapping parts.

2. The linkage assembly of the full automatic puncture needle according to claim 1, wherein the trigger receiving block (8b) is provided at a first end of the linkage rod (8), and the trigger linkage block (8c) is provided at a second end of the linkage rod (8).

3. The linkage assembly of a fully automatic puncture needle according to claim 2, wherein the trigger receiving block (8b) includes an abutment surface (8b1) for abutting the inner hub (4 a);

the trigger linkage block (8c) comprises a trigger bevel (8c1) for pushing the outer needle seat (4 b).

4. The linkage assembly of the full-automatic puncture needle according to the claim 2 or 3, wherein the linkage rod (8) is cuboid, the trigger receiving block (8b) is positioned on the first side surface of the first end of the linkage rod (8), the trigger linkage block (8c) is positioned on the second side surface of the second end of the linkage rod (8), and the first side surface and the second side surface are adjacent surfaces.

5. The linkage assembly of the full-automatic puncture needle according to claim 4, characterized by further comprising a guide block (8a) connected with the connecting rod guide groove of the puncture needle, wherein the guide block (8a) is fixedly connected with the linkage rod (8).

6. The linkage assembly of the full-automatic puncture needle according to claim 5, wherein the guide block (8a) is in a strip shape and is positioned on a third side surface of the first end of the linkage rod (8), the third side surface is opposite to the first side surface, and the length direction of the guide block (8a) is parallel to the length direction of the linkage rod (8).

7. The linkage assembly of a fully automatic puncture needle according to claim 5, further comprising an escape groove (8d) for connecting the cushion block.

8. The linkage assembly of a fully automatic puncture needle according to claim 7, wherein the escape slot (8d) is located between the trigger receiving block (8b) and the trigger linkage block (8c) and at the first side.

9. The linkage assembly of the full-automatic puncture needle according to the claim 3, wherein, one side of the trigger linkage block (8c) far away from the linkage rod (8) is provided with an extension part (8e) extending along the length direction of the linkage rod (8).

10. A fully automatic puncture needle comprising an inner needle assembly, an outer needle assembly, and a linkage assembly of the fully automatic puncture needle according to any one of claims 1 to 9;

the inner needle assembly comprises an inner needle seat (4a), the outer needle assembly comprises an outer needle seat (4b), the inner needle seat (4a) is excited to abut against a trigger receiving block (8b) and drive a linkage rod (8) to move, and the trigger linkage block (8c) and the linkage rod (8) synchronously move and drive the outer needle seat (4b) to be excited.

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