A gear shifting structure of a fully automatic puncture needle and a fully automatic puncture needle

Abstract

The present invention relates to the technical field of puncture devices, and particularly to a gear shifting structure and a fully automatic puncture needle for a fully automatic puncture needle. The gear shifting structure includes a gear shifting block and an inner housing; at least one set of blocking surfaces is provided at the end of the first side surface of the gear shifting block, and handles are provided on both sides of the gear shifting block where the blocking surfaces are located; the inner housing includes a base plate and two side plates connected to the base plate. The base plate and the two side plates enclose a groove body for accommodating the gear shifting block, and the distance between the two side plates is greater than the width of the gear shifting block, so that the gear shifting block can move between the two side plates to achieve gear shifting; gear shifting chutes are respectively provided on the two side plates, and the two handles are respectively clamped with the two gear shifting chutes and can slide in the gear shifting chutes. According to the technical solution provided by the present invention, the structure of the inner housing is adapted to structures such as the gear shifting block and the linkage rod, which can not only provide stable support, but also make the structure more compact, so that the fully automatic puncture needle has the advantages of high stability and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of puncture devices, and particularly to a gear shifting structure of a fully automatic puncture needle and a fully automatic puncture needle. Background Art

[0002] Guiding a puncture needle to a target position in the human body under ultrasonic guidance to achieve cytological biopsy, histological biopsy, cyst aspiration and treatment, etc. are currently important means for disease monitoring and treatment. The puncture needle is an important tool in such ultrasonic-guided surgeries. Currently, the puncture needles used for biopsy usually adopt a structure of an inner needle and an outer needle. When in use, the inner needle is first triggered to puncture the target area, and then the outer needle is triggered to follow the inner needle to puncture. Through the shearing of the inner needle tip and the outer needle tip, a part of the tissue in the target area is cut off, placed in the accommodating cavity at the end of the inner needle tip, and is taken out together with the withdrawal of the puncture needle for biopsy.

[0003] By setting a gear shifting structure in the puncture needle, the inner and outer needles can perform punctures at different depths, thereby improving the versatility of the puncture needle. However, with the change of the internal structure of the puncture needle, that is, the addition of a gear shifting structure, a linkage rod structure, etc., the existing ordinary puncture needle housing cannot be adapted to the gear shifting structure for use. Summary of the Invention

[0004] The present invention provides a gear shifting structure of a fully automatic puncture needle and a fully automatic puncture needle. The inner housing structure is adapted to structures such as a gear shifting block and a linkage rod, which can not only provide stable support, but also make the structure more compact, so that the fully automatic puncture needle has the advantages of high stability and safety.

[0005] In one aspect of the present invention, a gear shifting structure of a fully automatic puncture needle is provided, which includes a gear shifting block and an inner housing; at least one set of blocking surfaces is provided at the end of the first side surface of the gear shifting block, and handles are provided on both sides of the gear shifting block located at the blocking surfaces; the inner housing includes a base plate and two side plates connected to the base plate. The base plate and the two side plates enclose a groove body for accommodating the gear shifting block, and the distance between the two side plates is greater than the width of the gear shifting block, so that the gear shifting block can move between the two side plates to achieve gear shifting; gear shifting chutes are respectively provided on the two side plates, and the two handles are respectively clamped with the two gear shifting chutes and can slide in the gear shifting chutes.

[0006] Optionally, the handle is rod-shaped, and a plurality of grooves are provided at intervals along the axial direction on the outer wall of the handle; gear shifting positioning blocks for clamping with the grooves are provided on the inner wall of the gear shifting chute.

[0007] Optionally, the first end of the handle is perpendicularly connected to the gear shifting block, and the second end is connected to an operating hand position; the outer diameter of the operating hand position is greater than the width of the gear shifting chute.

[0008] Another aspect of the present invention also provides a fully automatic puncture needle, which includes an inner needle seat, an outer needle seat, and the above-mentioned gear shifting structure; the inner needle seat and the outer needle seat are arranged in the groove body of the inner shell of the gear shifting structure.

[0009] Optionally, the tops of the two side plates are connected by a locking block; the locking block is provided with an inner needle locking edge for clamping the inner needle seat and an outer needle locking edge for clamping the outer needle seat.

[0010] Optionally, the inner shell further includes a rear stop block, which is clamped with the side plates and the base plate; on one side of the rear stop block located in the groove, there are two spring grooves respectively for supporting the springs.

[0011] Optionally, it further includes a linkage rod, which is arranged in the groove body; the linkage rod is provided with a trigger receiving block and a trigger linkage block. The trigger receiving block is located between the inner needle seat and the blocking surface and has a defined distance from the blocking surface. The trigger linkage block is attached to the second end of the outer needle seat; the locking block is provided with a second guiding groove, and the linkage rod is arranged in the second guiding groove and can slide freely in the second guiding groove.

[0012] Optionally, a guiding block is provided at the first end of the linkage rod, the trigger linkage block is arranged at the second end of the linkage rod, and an extension part extending along the axial direction of the linkage rod is provided on the side of the trigger linkage block away from the linkage rod; a front stop block is provided at the first end of the two side plates, and a linkage rod guiding groove for inserting the guiding block is provided on the front stop block; a supporting platform is further provided on one side of the rear stop block located in the groove, and the extension part is arranged on the supporting platform.

[0013] Optionally, the locking block is further provided with a guiding surface for abutting against the trigger linkage block, and the guiding surface extends horizontally towards the rear stop block.

[0014] Optionally, the front stop block is further provided with a needle hole and fixing holes respectively for clamping the guiding rods of the inner needle seat and the outer needle seat; and an extension plate extending along the plate surface of the base plate is provided at the first end of the base plate, and a needle groove is provided on the extension plate.

[0015] Optionally, it further includes an inner needle winding-up button and an outer needle winding-up button; the inner needle winding-up button is provided with an inner needle button connecting column for connecting with the inner needle seat, and the outer needle winding-up button is provided with an outer needle button connecting column for connecting with the outer needle seat; the front stop block is provided with a winding-up button slide rail for inserting the inner needle winding-up button and the outer needle winding-up button.

[0016] Optionally, it further includes a front fixing sleeve and a rear fixing sleeve; a guiding ring for passing through the inner needle winding-up button and the outer needle winding-up button is provided at the first end of the front fixing sleeve, the second end abuts against the first end of the rear fixing sleeve, thus forming a sleeve structure, and the inner shell is arranged in the sleeve structure; a front locking buckle for clamping with the front fixing sleeve is provided on the side of the base plate away from the side plates; an outer shell locking buckle for clamping with the rear fixing sleeve is provided on the side plates.

[0017] According to the technical solution provided by the present invention, the inner housing structure is adapted to structures such as the shifting block and the linkage rod, which can not only provide stable support, but also make the structure more compact, so that the fully automatic puncture needle has the advantages of high stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For purposes of illustration and not limitation, the present invention will now be described with reference to the preferred embodiments of the present invention, particularly with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic structural view of the fully automatic puncture needle provided by the embodiment of the present invention;

[0020] Figure 2 is a front view of the fully automatic puncture needle provided by the embodiment of the present invention;

[0021] Figure 3 is a cross-sectional view of the fully automatic puncture needle provided by the embodiment of the present invention;

[0022] Figure 4 is an exploded view of the fully automatic puncture needle provided by the embodiment of the present invention;

[0023] Figure 5 is a schematic structural view of the inner housing in the fully automatic puncture needle provided by the embodiment of the present invention;

[0024] Figure 6 is a front view of the front end of the inner housing in the fully automatic puncture needle provided by the embodiment of the present invention;

[0025] Figure 7 is a schematic structural view of the rear stop block in the fully automatic puncture needle provided by the embodiment of the present invention;

[0026] Figure 8 is a top view of the inner housing in the fully automatic puncture needle provided by the embodiment of the present invention;

[0027] Figure 9 is Figure 8 a cross-sectional view taken at "A-A" in

[0028] Figure 10 is a schematic structural view of the linkage rod in the fully automatic puncture needle provided by the embodiment of the present invention;

[0029] Figure 11 is a schematic structural view of the shifting block in the fully automatic puncture needle provided by the embodiment of the present invention;

[0030] Figure 12 is a schematic structural view of the shifting block from another perspective in the fully automatic puncture needle provided by the embodiment of the present invention;

[0031] Figure 13It is a schematic diagram of the structure of a winding button in a fully automatic puncture needle provided in an embodiment of the present invention;

[0032] Figure 14 It is a schematic diagram of the structure of the middle and outer needle seats of the fully automatic puncture needle provided in an embodiment of the present invention;

[0033] Figure 15 This is a front view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0034] Figure 16 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0035] Figure 17 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0036] Figure 18 It is a cross-sectional view of the first gear state of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0037] Figure 19 It is a cross-sectional view of the second gear state of the fully automatic puncture needle provided by the embodiment of the present invention without a housing. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present application. For the sake of simplicity, in the description of each implementation of the present application, the same or similar reference numerals are used for the same or similar device / method steps.

[0039] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other.

[0040] Figure 1 is a schematic structural diagram of a fully automatic puncture needle provided in an embodiment of the present invention; Figure 2 This is a front view of a fully automatic puncture needle provided in an embodiment of the present invention; Figure 3 is a cross-sectional view of a fully automatic puncture needle provided in an embodiment of the present invention; Figure 4 FIG. 1 is an exploded view of the fully automatic puncture needle provided in an embodiment of the present invention. Figures 1 to 4 As shown, the fully automatic puncture needle includes an outer shell, an inner 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 adjustment assembly for adjusting the range gear position of the inner needle assembly and the outer needle assembly.

[0041] The following will describe each component of the fully automatic puncture needle in detail with reference to the accompanying drawings. When describing the positions of the components, the tip of the needle is regarded as the front, and the side of the outer casing with the trigger button is regarded as the top.

[0042] Figure 5 is a schematic structural view of the inner casing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 6 is a front view of the front end of the inner casing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 7 is a schematic structural view of the rear stopper in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 8 is a top view of the inner casing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 9 is Figure 8 a cross-sectional view taken at "A - A" in Figures 1 to 9 As shown, the inner needle assembly includes an inner needle 1a, an inner needle seat 4a for fixing the inner needle 1a, an inner needle seat guide rod 3a, and an inner needle seat spring 2a. The inner needle seat 4a is provided with an inner needle seat locking hook 4a1 that can be locked or unlocked with the locking block 9f of the inner casing 9, and a guide hole (not shown) through which the inner needle seat guide rod 3a passes. In addition, an inner needle button connection seat 4a3 for connecting the inner needle winding button 5a is fixedly provided at the front end of the inner needle seat 4a. The inner needle seat spring 2a is sleeved on the inner needle seat guide rod 3a, and its two ends respectively abut against the inner needle seat 4a and the rear stopper 9e.

[0043] Figure 14 is a schematic structural view of the outer needle seat in the fully automatic puncture needle provided by an embodiment of the present invention. As Figures 1 to 9 and Figure 14 shown, the outer needle assembly includes an outer needle 1b, an outer needle seat 4b for fixing the outer needle 1b, an outer needle seat guide rod 3b, and an outer needle seat spring 2b. The outer needle seat 4b is provided with an outer needle seat locking hook 4b1 that can be locked or unlocked with the locking block 9f of the inner casing 9, and a guide hole (not shown) through which the outer needle seat guide rod 3b passes. In addition, an outer needle button connection seat 4b3 for connecting the outer needle winding button 5b is fixedly provided at the front end of the outer needle seat 4b. The outer needle seat spring 2b is sleeved on the outer needle seat guide rod 3b, and its two ends respectively abut against the outer needle seat 4b and the rear stopper 9e.

[0044] Figure 10 is a schematic structural view of the linkage rod in the fully automatic puncture needle provided by an embodiment of the present invention. As Figure 10As shown, the linkage assembly includes a linkage rod 8, a linkage guide block 8a, a trigger receiving block 8b, a trigger linkage block 8c and an avoidance groove 8d. Among them, the linkage guide block 8a is slidably arranged in the linkage guide groove on the outer shell. The trigger receiving block 8b includes an abutment surface 8b1, which is used to receive the impact of the inner needle trigger block on the inner needle seat 4a, and makes the linkage assembly move with the inner needle seat 4a. When the linkage assembly is driven by the inner needle seat 4a, the trigger inclined surface 8c1 of the trigger linkage block 8c hits the outer needle seat lock hook 4b1, and makes it fall off and unlock from the locking block 9f of the inner shell 9, so that the outer needle seat 4b is triggered, and the outer needle 1b pops out under the action of the outer needle seat spring 2b. Thereby, after the inner needle 1a and the inner needle seat 4a pop out, the outer needle 1b and the outer needle seat 4b pop out. During the working process of the inner needle 1a and the outer needle 1b being ejected successively, a section of tissue is removed from the target part by shearing the ends of the inner needle 1a and the outer needle 1b and stored in the storage slot 1a1 at the end of the inner needle 1a (it can be taken out after pushing down the outer needle 1b). The avoidance slot 8d in the linkage assembly is used to avoid the pad 12 in the gear adjustment assembly. For the specific avoidance method, please refer to the subsequent description.

[0045] Figure 11 It is a structural schematic diagram of a gear adjustment block in a fully automatic puncture needle provided in an embodiment of the present invention; Figure 12 1 is a schematic diagram of the structure of the gear adjustment block in the fully automatic puncture needle provided by the embodiment of the present invention from another perspective. Figure 11 and Figure 12 As shown, the gear shifting assembly includes a gear shifting block 10 slidable left and right in the inner housing 9 , a handle 11 and a cushion block 12 .

[0046] A plurality of blocking surfaces may be provided on the gear adjustment block 10 to achieve multiple gear adjustments. In the embodiment of the present invention, two blocking surfaces are taken as an example, namely, a first blocking surface 10a and a second blocking surface 10b. Figure 15 This is a front view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Figure 16 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Figure 17 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Figure 18 It is a cross-sectional view of the first gear state of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Figure 19 2 is a cross-sectional view of the second gear state of the fully automatic puncture needle without a housing provided by the embodiment of the present invention. Figures 15 to 19As shown, the shifting block 10 has two first blocking surfaces 10a and two second blocking surfaces 10b. According to the left and right sliding of the shifting block 10, it can be selected to make the inner needle seat 4a and the outer needle seat 4b impact on the first blocking surface 10a or the second blocking surface 10b after being triggered (the abutting ends of the inner needle seat 4a and the outer needle seat 4b impact on the first blocking surface 10a or the second blocking surface 10b). In the embodiment of the present invention, when the inner needle seat 4a and the outer needle seat 4b impact on the first blocking surface 10a, the moving distance is larger, that is, the shooting ranges of the inner needle 1a and the outer needle 1b are longer. When the inner needle seat 4a and the outer needle seat 4b impact on the second blocking surface 10b, the moving distance is smaller, that is, the shooting ranges of the inner needle 1a and the outer needle 1b are shorter.

[0047] Continue to refer to Figures 15 to 19 、and Figures 5 to 9 , as shown in the figure, the handles 11 are arranged on the left and right sides of the shifting block 10 and extend out of the inner housing and the outer housing for manually adjusting the position of the shifting block 10 to achieve the adjustment of the gear position. The part of the handle 11 extending out of the housing is a round rod. Each side of the handle 11 has two grooves 11a, and the grooves 11a are used for locking after the gear position is switched. Corresponding to the grooves 11a, the shifting positioning block 9j on the inner housing 9 clamps the round rod of the handle 11 when the handle 11 moves. When the shifting positioning block 9j slides from the round rod into the groove 11a, it impacts on the groove 11a and makes an impact sound to indicate that the shifting is completed.

[0048] As Figure 11 and Figure 12 shown, a cushion block 12 is further arranged on the shifting block 10 and is fixedly connected to the shifting block 10 through an elastic rod. When the shifting operation is performed, the cushion block 12 slides left and right together with the shifting block 10. When the shifting block 10 is in the second gear, the cushion block 12 slides between the trigger receiving block 8b of the linkage assembly and the inner needle seat 4a. Since in the second gear, the moving distances of the inner needle seat 4a and the outer needle seat 4b are smaller, after the inner needle seat 4a is triggered, it cannot activate the linkage assembly (the shortening of the moving distance results in no contact between the inner needle seat 4a and the linkage assembly), and thus the outer needle seat 4b cannot be activated. In the embodiment of the present invention, the cushion block 12 serves as a compensation for the reduction of the moving distance of the inner needle seat 4a in the second gear. After the cushion block 12 is set, the shifting block 10 can also successfully activate the outer needle seat 4b in the second gear position. Among them, the thickness of the cushion block 12 is determined by the distance between the first blocking surface 10a and the second blocking surface 10b.

[0049] As Figures 5 to 9As shown, 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 edge 9g, an outer needle locking edge 9h, a gear adjustment slide groove 9i, a gear adjustment positioning block 9j, a winding button slide rail 9k, a front locking buckle 91 and an outer shell locking buckle 9m. The needle groove 9b is located in 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 arranged on both sides of the base plate 9a, and are used to protect and support the components of the inner housing 9. The front stopper 9d is fixedly arranged at the front of the two side plates 9c, and is mainly used to form the winding button slide rail 9k together with the base plate 9a. In addition, it also has a needle hole 9d1 connected to the needle groove 9b, a connecting rod guide groove 9d2 for guiding the connecting rod guide block 8a, and two fixing holes 9d3 for clamping the inner needle seat guide rod 3a and the outer needle seat guide rod 3b respectively.

[0050] Continue to refer Figures 5 to 9 As shown in the figure, the rear block 9e is clamped in the clamping grooves of the rear part of the base plate 9a and the side plate 9c through the protrusions 9e1 at its bottom and both sides, and the rear block 9e has two spring grooves 9e2 for supporting the spring. In addition, the rear block 9e has a supporting platform 9e3, and the side of the trigger linkage block 8c away from the linkage rod 8 is provided with an extension part 8e extending along the length direction of the linkage rod 8, and the supporting platform 9e3 is used to support the rear end of the extension part 8e. Since the length of the connecting rod guide block 8a on the linkage rod 8 is short and located at the front end, a supporting platform 9e3 for supporting the rear end of the extension part 8e is provided at the rear end. The locking block 9f is fixedly placed horizontally between the two side plates 9c, and has 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. The lower surface of the middle part of the locking block 9f has a second guide groove 9f1 for guiding the linkage rod 8, and the second guide groove 9f1 limits the left, right and upper directions of the linkage rod 8. The locking block 9f also has a guide surface 9f2 extending horizontally to the rear, and the guide surface 9f2 is used to resist the trigger slope 8c1 on the linkage rod 8 to play a guiding role, thereby preventing the trigger slope 8c1 from touching other structures and getting stuck.

[0051] The shift positioning block 9j is used to clamp the handle 11 of the shift assembly. When the shift positioning block 9j slides from the round rod of the handle 11 into the groove 11a (refer to Figure 11 and Figure 12) It hits on the groove 11a to make a hitting sound, indicating that the gear shifting is completed. The gear shifting positioning block 9j is only arranged in the gear shifting chute 9i on one side. In this way, when adjusting to different gears, it hits on different parts of the handle 11 to make different sounds, increasing the distinguishability of gears. The front locking buckle 9l is two protrusions arranged on the lower surface of the front part of the base plate 9a, and is used to lock and set the front fixing sleeve 6 arranged in the front part of the inner housing 9 to prevent it from falling off. The outer shell locking buckle 9m is arranged on the side plate 9c and is used to lock the rear fixing sleeve 7 sleeved outside the inner housing 9, so as to facilitate the disassembly and assembly of the rear fixing sleeve 7. The outer shell locking buckle 9m includes a boss protruding outward and an elastic connecting rod for increasing its elastic deformation ability.

[0052] Figure 13 It is a schematic structural diagram of the stringing button on the fully automatic puncture needle provided by the embodiment of the present invention. As Figures 1 to 4 、 Figure 13 and Figure 14 shown, the outer housing includes a front fixing sleeve 6, a rear fixing sleeve 7, an inner needle stringing button 5a and an outer needle stringing button 5b. The front fixing sleeve 6 has a card slot for clamping with the base plate 9a, and is mutually locked with the base plate 9a through the front locking buckle 9l. The front fixing sleeve 6 has a guiding ring 6a for passing through the inner needle stringing button 5a and the outer needle stringing button 5b. The rear fixing sleeve 7 is sleeved outside the inner housing 9 from the rear part of the inner housing 9 and is used for protecting the inner housing 9 and its internal components. Both side parts of the rear fixing sleeve 7 have locking holes for cooperating with the outer shell locking buckle 9m. The rear fixing sleeve 7 also has a trigger button 7a. When the locking hole is mutually locked with the outer shell locking buckle 9m, the trigger button 7a is located above the inner needle seat hook 4a1 of the inner needle seat 4a after stringing. After pressing the trigger button 7a, the trigger button 7a pushes the inner needle seat hook 4a1 away from the inner needle locking edge 9g on the locking block 9f, so that the inner needle seat 4a is triggered and pops out under the action of the inner needle seat spring 2a.

[0053] The area of the rear fixing sleeve 7 corresponding to the handle 11 on the gear shifting block 10 has a through hole, and the diameter of the through hole is larger than the diameter of the end part of the handle 11. When the handle 11 is closely attached to the inner housing 9, it can be completely immersed in the through hole on the rear fixing sleeve 7. In addition, an operation hand position 111 is arranged at the end part of the handle 11, and the diameter of the operation hand position is larger than the diameter of the through hole, such as adopting a circular plate structure, so that the operation hand position can be further used for limiting. In the embodiment of the present invention, when the gear shifting block 10 is adjusted, it includes two gears. Two handles 11 are arranged on the gear shifting block 10. When performing the gear shifting operation, when the gear shifting block 10 is in the first gear, the operation hand position on one side is attached to the outer wall of the rear fixing sleeve 7, and when it is in the second gear, the operation hand position on the other side is attached to the outer wall of the rear fixing sleeve 7.

[0054] Continue to refer to Figures 1 to 4 、 Figure 13 and Figure 14, as shown in the figure, a semi-circular protruding edge portion 7b is provided on the outer periphery of the trigger button 7a of the rear fixing sleeve 7. The height of the edge portion 7b is slightly higher than the height of the trigger button 7a protruding from the rear fixing sleeve 7, and the edge portion 7b is located at the front of the trigger button 7a. When grasping the outer casing by hand, the fingers (especially the thumb) are prone to sliding forward to backward. (When a doctor operates the puncture needle, it may be necessary to switch different hand-holding positions, and the sliding of the fingers will be very frequent), which is very likely to touch the trigger button 7a and cause accidental triggering. Therefore, the edge portion 7b provided on the trigger button 7a can effectively prevent accidental triggering, thus ensuring the safety performance of the puncture needle during use.

[0055] The inner needle winding button 5a has an inner needle pressing surface 5a1, an inner needle button connecting column 5a2 that is snap-connected to the inner needle button connecting seat 4a3, and an inner needle button guiding column 5a3. When the inner needle button connecting seat 4a3 is snap-connected to the inner needle button connecting column 5a2, a complete columnar shape is formed and can slide in the winding button slide rail 9k. The inner needle button guiding column 5a3 is slidably arranged in the gap between the guiding ring 6a and the front stopper 9d to maintain stability. The inner needle button connecting column 5a2 and the inner needle button guiding column 5a3 are respectively located at the upper and lower ends of the inner needle winding button 5a to improve the stability when pressing the inner needle winding button 5a. The outer needle winding button 5b includes an outer needle pressing surface 5b1, an outer needle button connecting column 5b2, and an outer needle button guiding column 5b3. The outer needle winding button 5b is symmetric with the inner needle winding button 5a about the axis, and will not be elaborated here one by one. Among them, pressing threads or indicating labels, or pressing threads with indicating functions, are also provided on the inner needle pressing surface 5a1 and the outer needle pressing surface 5b1. The indicating labels can be marked with ① and ②, etc., to play a role in reminding the operation sequence, and the pressing threads play a role in increasing friction.

[0056] The fully automatic puncture needle provided by the embodiment of the present invention has the following puncture operations:

[0057] Manually press the inner needle winding button 5a so that the inner needle seat hook 4a1 of the inner needle seat 4a hooks on the inner needle locking edge 9g to lock the inner needle; manually press the outer needle winding button 5b so that the outer needle seat hook 4b1 of the outer needle seat 4b hooks on the outer needle locking edge 9h to lock the outer needle. After the winding operation is completed, the inner needle and the outer needle are respectively in a state of waiting to be excited.

[0058] Adjust the gear shifting component according to the puncture requirement, that is, push the handle 11 to move the gear shifting block 10 and adjust it to the required gear (the gear can only be adjusted when both the inner needle and the outer needle are in the wound state).

[0059] With the assistance of an ultrasonic device, the inner needle 1a and the outer needle 1b are aligned with the target position of the patient. The trigger button 7a is pressed, and the trigger button 7a pushes the inner needle seat lock hook 4a1 away from the inner needle locking edge 9g on the locking block 9f, triggering the inner needle seat 4a. Under the action of the inner needle seat spring 2a, it pops out until the inner needle seat 4a hits the gear adjustment block 10 and stops. During this process, the inner needle 1a is synchronously pushed out and stopped with the inner needle seat 4a, completing a puncture process of the inner needle. When the gear adjustment block 10 is in the first gear, before the inner needle seat 4a hits the trigger receiving block 8b on the linkage rod 8 before moving to the first blocking surface 10a after being triggered, the trigger inclined surface 8c1 on the linkage rod 8 is driven by the linkage rod 8 to hit the outer needle seat lock hook 4b1, causing the outer needle seat lock hook 4b1 to move downward and unhook from the outer needle locking edge 9h, triggering the outer needle seat 4b. Under the action of the outer needle seat spring 2b, it pops out until the outer needle seat 4b hits the gear adjustment block 10 and stops. During this process, the outer needle 1b is synchronously pushed out and stopped with the outer needle seat 4b, completing a puncture process of the outer needle. When the gear adjustment block 10 is in the second gear, the stroke of the inner needle seat 4a after being triggered becomes shorter and cannot touch the receiving block 8b. However, after the spacer block 12 follows the gear adjustment block 10 to move, it just passes through the avoidance groove 8d and blocks in front of the receiving block 8b. The inner needle seat 4a can first hit the spacer block 12, and then transmit the power to the receiving block 8b through the spacer block 12 to complete the triggering of the outer needle 1b. During puncture, a section of tissue is taken from the target site through the shearing at the ends of the inner needle 1a and the outer needle 1b, and this section of tissue is stored in the storage groove 1a1 at the end of the inner needle 1a.

[0060] Press the outer needle winding button 5b again, so that the outer needle seat lock hook 4b1 of the outer needle seat 4b hangs on the outer needle locking edge 9h to lock the outer needle. At this time, the storage groove 1a1 at the end of the inner needle 1a is exposed, and the tissue can be taken out from the storage groove 1a1. Then, release the outer needle 1b again and perform shearing again through the ends of the inner needle 1a and the outer needle 1b.

[0061] Repeat the above steps multiple times until enough living samples are obtained.

[0062] According to the embodiments provided by the present invention, by using the blocking surfaces on the gear adjustment structure to block the inner needle assembly and the outer needle assembly, the inner needle assembly and the outer needle assembly can be stopped from moving within a limited stroke. Among them, multiple groups of gear adjustment structures are provided on the gear adjustment block. By switching different gear adjustment structures, the inner needle assembly and the outer needle assembly can be switched to different stroke distances, and further the puncture depths of the inner needle and the outer needle can be switched, achieving the purpose of adjusting the gear of the puncture needle. This gear adjustment component has the advantages of simple structure and convenient regulation, and can reduce the design and production costs of the puncture needle.

[0063] The above specific embodiments do not limit the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fully automatic puncture needle, characterized in that, It includes an inner needle seat (4a), an outer needle seat (4b) and a gear shifting structure; The gear shifting structure includes a gear shifting block (10) and an inner housing (9); At least one set of blocking surfaces (10a, 10b) is provided at the end of the first side surface of the gear shifting block (10), and handles (11) are provided on both sides of the gear shifting block (10) where the blocking surfaces (10a, 10b) are located; The inner housing (9) includes a base plate (9a) and two side plates (9c) connected to the base plate (9a). The base plate (9a) and the two side plates (9c) enclose a groove body for accommodating the gear shifting block (10), and the distance between the two side plates (9c) is greater than the width of the gear shifting block (10), so that the gear shifting block (10) can move between the two side plates (9c) to achieve gear shifting; The tops of the two side plates (9c) are connected by a locking block (9f); gear shifting chutes (9i) are respectively provided on the two side plates (9c), and the two handles (11) are respectively clamped with the two gear shifting chutes (9i) and can slide in the gear shifting chutes (9i); The inner needle seat (4a) and the outer needle seat (4b) are arranged in the groove body of the inner housing (9) of the gear shifting structure; It further includes a linkage rod (8), and the linkage rod (8) is arranged in the groove body; A trigger receiving block (8b) and a trigger linkage block (8c) are provided on the linkage rod (8). The trigger receiving block (8b) is located between the inner needle seat (4a) and the blocking surfaces (10a, 10b) and has a defined distance from the blocking surfaces (10a, 10b), and the trigger linkage block (8c) is attached to the second end of the outer needle seat (4b); A second guiding groove (9f1) is provided on the locking block (9f), and the linkage rod (8) is arranged in the second guiding groove (9f1) and can freely slide in the second guiding groove (9f1).

2. The fully automatic puncture needle according to claim 1, wherein An inner needle locking edge (9g) for clamping the inner needle seat (4a) and an outer needle locking edge (9h) for clamping the outer needle seat (4b) are provided on the locking block (9f).

3. The fully automatic puncture needle according to claim 1, wherein, The inner housing (9) further includes a rear stop block (9e), and the rear stop block (9e) is clamped with the side plates (9c) and the base plate (9a); Two spring grooves (9e2) for supporting springs are provided on one side of the rear stop block (9e) located inside the groove.

4. The fully automatic puncture needle according to claim 1, wherein, A guiding block (8a) is provided at the first end of the linkage rod (8), the trigger linkage block (8c) is arranged at the second end of the linkage rod (8), and an extension part extending along the axis direction of the linkage rod (8) is provided on the side of the trigger linkage block (8c) away from the linkage rod (8); Front stop blocks (9d) are provided at the first ends of the two side plates (9c), and a linkage rod guiding groove (9d2) for inserting the guiding block (8a) is provided on the front stop blocks (9d); a supporting platform (9e3) is further provided on one side of the rear stop block (9e) located inside the groove, and the extension part is arranged on the supporting platform (9e3).

5. The fully automatic puncture needle according to claim 4, wherein A guiding surface (9f2) for abutting against the trigger linkage block (8c) is further provided on the locking block (9f), and the guiding surface (9f2) horizontally extends towards the direction of the rear stop block (9e).

6. The fully automatic puncture needle according to claim 4, wherein, A needle hole (9d1) and fixing holes (9d3) for respectively clamping the inner needle seat guiding rod (3a) and the outer needle seat guiding rod (3b) are further provided on the front stop block (9d); And a first end of the substrate (9a) is provided with an extension plate extending along the plate surface of the substrate (9a), and a needle slot (9b) is provided on the extension plate.

7. The fully automatic puncture needle according to claim 4, wherein It further includes an inner needle winding button (5a) and an outer needle winding button (5b); The inner needle winding button (5a) is provided with an inner needle button connecting column (5a2) for connecting with the inner needle seat (4a), and the outer needle winding button (5b) is provided with an outer needle button connecting column (5b2) for connecting with the outer needle seat (4b); The front stop block (9d) is provided with a winding button slide rail (9k) for inserting the inner needle winding button (5a) and the outer needle winding button (5b).

8. The fully automatic puncture needle according to claim 7, wherein It further includes a front fixing sleeve (6) and a rear fixing sleeve (7); A first end of the front fixing sleeve (6) is provided with a guiding ring (6a) for passing through the inner needle winding button (5a) and the outer needle winding button (5b), and a second end thereof abuts against a first end of the rear fixing sleeve (7), thereby forming a sleeve structure, and the inner housing (9) is arranged inside the sleeve structure; A front locking buckle (9l) for clamping with the front fixing sleeve (6) is arranged on a side of the substrate (9a) away from the side plate (9c); an outer housing locking buckle (9m) for clamping with the rear fixing sleeve (7) is arranged on the side plate (9c).

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