A gear shifting component 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 component and a fully automatic puncture needle for a fully automatic puncture needle. The gear-shifting component includes a gear-shifting block, and the first side surface of the gear-shifting block includes two groups of gear-shifting structures arranged side by side perpendicular to the needle shooting direction; each group of gear-shifting structures includes two blocking surfaces perpendicular to the needle shooting direction, which are respectively used to block the inner needle assembly and the outer needle assembly; the two blocking surfaces of the same group of gear-shifting structures are flush, and the blocking surfaces of different groups of gear-shifting structures have a height difference along the needle shooting direction. According to the technical solution provided by the present invention, multiple groups of gear-shifting structures are arranged on the gear-shifting block. By switching different gear-shifting 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, so as to achieve the purpose of gear shifting of the puncture needle. The gear-shifting component has the advantages of simple structure and convenient regulation and control, and can reduce the design and production costs of the puncture needle.

Description

Technical Field

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

[0002] Guiding a puncture needle to a target position in the human body under ultrasound 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 ultrasound-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 accommodation cavity at the end of the inner needle tip, and is taken out together with the withdrawal of the puncture needle for biopsy.

[0003] However, since the sizes and shapes of the target areas to be obtained are different, doctors usually select biopsy puncture needles with different ranges (the displacement of the inner and outer needles after being triggered) according to the specific conditions of the target area to meet the needs of biopsy. To meet the multi-range use requirements of the puncture needle, currently, a puncture needle capable of adjusting the range has emerged on the market, and its range adjustment of the inner and outer needles is achieved through a complex transmission structure such as an adjustment knob. Although the range adjustment is achieved, its complex structure will cause a substantial increase in production costs, thereby increasing the surgical cost, and the complex structure affects the stability of the biopsy needle, and there may be jamming or even more serious medical accidents. Summary of the Invention

[0004] The present invention provides a gear shifting assembly and a fully automatic puncture needle for a fully automatic puncture needle. By using the gear shifting structure in the gear shifting assembly, the stroke distances of the inner needle assembly and the outer needle assembly can be changed, thereby achieving the purpose of adjusting the length of the puncture needle.

[0005] In one aspect of the present invention, a gear shifting assembly for a fully automatic puncture needle is provided, which is arranged in a puncture device. The puncture device has an inner needle assembly and an outer needle assembly. The gear shifting assembly includes a gear shifting block. The first side of the gear shifting block includes two sets of gear shifting structures arranged in parallel perpendicular to the needle shooting direction; each set of gear shifting structures includes two blocking surfaces perpendicular to the needle shooting direction, which are respectively used to block the inner needle assembly and the outer needle assembly; the two blocking surfaces of the same set of gear shifting structures are flush, and the blocking surfaces of different sets of gear shifting structures have a height difference along the needle shooting direction.

[0006] Optionally, the two blocking surfaces in the same set of gear shifting structures are arranged at intervals.

[0007] Optionally, one end or both ends of the gear shifting block are connected with handles.

[0008] Optionally, it further includes an operating handle position. The handle is rod-shaped. The first end of the handle is perpendicularly connected to the gear shifting block, and the second end is connected to the operating handle position.

[0009] Optionally, a plurality of grooves for clamping with the full-automatic puncture needle housing are provided on the outer wall of the handle, and the plurality of grooves are arranged at intervals along the length direction of the handle.

[0010] Optionally, the opposite side of the first side of the gear shifting block is a plane, and the plane is perpendicular to the needle injection direction.

[0011] Optionally, the handle, the operating handle position and the gear shifting block are of an integral structure.

[0012] Optionally, the gear shifting block further includes a cushion block. The cushion block is located on the first side of the gear shifting block and is connected to the end of the gear shifting block.

[0013] In another aspect of the present invention, a full-automatic puncture needle is further provided, which includes an inner needle assembly, an outer needle assembly and the gear shifting assembly of the above full-automatic puncture needle.

[0014] Optionally, the inner needle assembly and the outer needle assembly respectively include abutting ends for abutting against the gear shifting block.

[0015] According to the technical solution provided by the present invention, by using the blocking surface on the gear shifting 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 shifting structures are provided on the gear shifting block. By switching different gear shifting 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, so as to achieve the purpose of gear shifting of the puncture needle. This gear shifting assembly has the advantages of simple structure and convenient regulation, and can reduce the design and production costs of the puncture needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For purposes of illustration and not limitation, the present invention will now be described with reference to the preferred embodiments of the present invention, in particular with reference to the accompanying drawings, in which:

[0017] Figure 1 is a schematic structural diagram of the full-automatic puncture needle provided by the embodiment of the present invention;

[0018] Figure 2 is a front view of the full-automatic puncture needle provided by the embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of the full-automatic puncture needle provided by the embodiment of the present invention;

[0020] Figure 4 is an exploded view of the full-automatic puncture needle provided by the embodiment of the present invention;

[0021] Figure 5It is a schematic structural diagram of the inner housing in the fully automatic puncture needle provided by the embodiment of the present invention;

[0022] Figure 6 It 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;

[0023] Figure 7 It is a schematic structural diagram of the rear stopper in the fully automatic puncture needle provided by the embodiment of the present invention;

[0024] Figure 8 It is a top view of the inner housing in the fully automatic puncture needle provided by the embodiment of the present invention;

[0025] Figure 9 It is Figure 8 The cross-sectional view at "A-A" in

[0026] Figure 10 It is a schematic structural diagram of the linkage rod in the fully automatic puncture needle provided by the embodiment of the present invention;

[0027] Figure 11 It is a schematic structural diagram of the gear adjustment block in the fully automatic puncture needle provided by the embodiment of the present invention;

[0028] Figure 12 It is a schematic structural diagram of the gear adjustment block from another perspective in the fully automatic puncture needle provided by the embodiment of the present invention;

[0029] Figure 13 It is a schematic structural diagram of the winding-up button in the fully automatic puncture needle provided by the embodiment of the present invention;

[0030] Figure 14 It is a schematic structural diagram of the outer needle seat in the fully automatic puncture needle provided by the embodiment of the present invention;

[0031] Figure 15 It is a front view of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention;

[0032] Figure 16 It is a cross-sectional view of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention;

[0033] Figure 17 It is a cross-sectional view of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention;

[0034] Figure 18 It is a cross-sectional view of the first gear state of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention;

[0035] Figure 19 It is a cross-sectional view of the second gear state of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention. Detailed implementation manners

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The various components of the fully automatic puncture needle are described in detail below in conjunction with the accompanying drawings. When describing the positions of the components, the needle tip is at the front and the side of the outer shell having the trigger button is at the top.

[0040] Figure 5 It is a schematic structural diagram of the inner shell of the fully automatic puncture needle provided in an embodiment of the present invention;

[0041] Figure 6 It is a front view of the front end of the inner shell of the fully automatic puncture needle provided in an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a rear stopper in a fully automatic puncture needle provided in an embodiment of the present invention; Figure 8 is a top view of the inner shell of the fully automatic puncture needle provided in an embodiment of the present invention; Figure 9 yes Figure 8 The cross-sectional view at "AA" in the figure. 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 has an inner needle seat lock hook 4a1 that can be locked or unlocked with the locking block 9f of the inner housing 9, and a guide hole (not shown) for the inner needle seat guide rod 3a to pass through. In addition, an inner needle button connecting 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 penetrated on the inner needle seat guide rod 3a, and its two ends are respectively against the inner needle seat 4a and the rear stopper 9e.

[0042] Figure 14 is a schematic structural view of the outer needle holder in the fully automatic puncture needle provided by the 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 holder 4b for fixing the outer needle 1b, an outer needle holder guide rod 3b, and an outer needle holder spring 2b. The outer needle holder 4b has an outer needle holder lock hook 4b1 that can be locked or unlocked with the locking block 9f of the inner housing 9, and a guide hole (not shown) through which the outer needle holder 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 holder 4b. The outer needle holder spring 2b is sleeved on the outer needle holder guide rod 3b, and its two ends are respectively abutted against the outer needle holder 4b and the rear stop block 9e.

[0043] 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. As Figure 10 shown, the linkage assembly includes a linkage rod 8, a linkage block guide 8a, a trigger receiving block 8b, a trigger linkage block 8c, and an avoidance groove 8d. Among them, the linkage block guide 8a is slidably arranged in the linkage guide groove on the outer housing. The trigger receiving block 8b includes an abutting surface 8b1 for receiving the impact of the inner needle trigger block on the inner needle holder 4a and causing the linkage assembly to be driven by the inner needle holder 4a. When the linkage assembly is driven by the inner needle holder 4a, the trigger slope 8c1 of the trigger linkage block 8c impacts the outer needle holder lock hook 4b1 and causes it to fall off and unlock from the locking block 9f of the inner housing 9, so that the outer needle holder 4b is triggered, and the outer needle 1b pops out under the action of the outer needle holder spring 2b. Thus, after the inner needle 1a and the inner needle holder 4a pop out, the outer needle 1b and the outer needle holder 4b follow and pop out. During the working process of the sequential popping out of the inner needle 1a and the outer needle 1b, a section of tissue is taken at the target site through the shearing of the ends of the inner needle 1a and the outer needle 1b and stored in the storage groove 1a1 at the end of the inner needle 1a (it can be taken out after pushing down the outer needle 1b). The avoidance groove 8d in the linkage assembly is used to avoid the cushion block 12 in the gear shifting assembly, and the specific avoidance method is referred to the subsequent description.

[0044] Figure 11 is a schematic structural view of the gear shifting block in the fully automatic puncture needle provided by the embodiment of the present invention;

[0045] Figure 12 is a schematic structural view of the gear shifting block from another perspective in the fully automatic puncture needle provided by the embodiment of the present invention. As Figure 11 and Figure 12 shown, the gear shifting assembly includes a gear shifting block 10 that slides left and right in the inner housing 9, a handle 11, and a cushion block 12.

[0046] Multiple blocking surfaces can be provided on the gear shifting block 10 to achieve multiple gear adjustments. In the embodiment of the present invention, taking two blocking surfaces as an example, namely the first blocking surface 10a and the second blocking surface 10b. Figure 15 is the front view of the fully automatic puncture needle provided by the embodiment of the present invention without a housing; Figure 16 is the sectional view of the fully automatic puncture needle provided by the embodiment of the present invention without a housing; Figure 17 is the sectional view of the fully automatic puncture needle provided by the embodiment of the present invention without a housing; Figure 18 is the sectional view of the first gear state of the fully automatic puncture needle provided by the embodiment of the present invention without a housing; Figure 19 is the sectional view of the second gear state of the fully automatic puncture needle provided by the embodiment of the present invention without a housing. As Figures 15 to 19 shown, there are two first blocking surfaces 10a and two second blocking surfaces 10b on the gear shifting block 10. According to the left and right sliding of the gear 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 gear shifting block 10 and extend out of the inner housing and the outer housing for manually adjusting the position of the gear shifting block 10 to achieve gear adjustment. The part of the handle 11 extending out of the housing is a round rod. Each handle 11 on each side has two grooves 11a for locking after gear shifting. Correspondingly, the gear shifting positioning block 9j on the inner housing 9 clamps the round rod of the handle 11 when the handle 11 moves. When the gear shifting positioning block 9j slides from the round rod into the groove 11a, it makes an impact sound when hitting the groove 11a, indicating that the gear shifting is completed.

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

[0049] As Figures 5 to 9 shown, the inner housing 9 includes a base plate 9a, a needle slot 9b, side plates 9c, a front stop block 9d, a rear stop block 9e, a locking block 9f, an inner needle locking edge 9g, an outer needle locking edge 9h, a gear shifting chute 9i, a gear shifting positioning block 9j, a mainspring winding button slide rail 9k, a front locking buckle 9l, and a housing locking buckle 9m. The needle slot 9b is located in the middle of the upper surface of the base plate 9a and is for the inner needle 1a and the outer needle 1b to pass through. The side plates 9c are fixedly provided on both sides of the base plate 9a and are used to protect and support the components of the inner housing 9. The front stop block 9d is fixedly provided at the front of the two side plates 9c and is mainly used to form the mainspring winding button slide rail 9k together with the base plate 9a. In addition, it also has a needle hole 9d1 communicating with the needle slot 9b, a link guide groove 9d2 for guiding the link guide block 8a, and two fixing holes 9d3 for respectively clamping the inner needle seat guide rod 3a and the outer needle seat guide rod 3b.

[0050] Continue to refer to Figures 5 to 9As 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 ), hits the groove 11a and makes a sound of impact, indicating that the gear shift is completed. The gear shift positioning block 9j is only set in the gear shift slide groove 9i on one side. In this way, when adjusting to different gears, it hits different parts of the handle 11, making different sounds, thereby increasing the differentiation of the gears. The front locking buckle 9l is set on two protrusions on the lower surface of the front part of the base plate 9a, which are used to lock the front fixing sleeve 6 fixed on the front part of the inner shell 9 to prevent it from falling off. The outer shell locking buckle 9m is set on the side plate 9c, and is used to lock the rear fixing sleeve 7 set on the outside of the inner shell 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 that increases its elastic deformation ability.

[0052] Figure 13 Schematic diagram of the structure of the winding button in the fully automatic puncture needle provided in the embodiment of the present invention. Figures 1 to 4 , Figure 13 and Figure 14As shown in the figure, the outer housing includes a front fixing sleeve 6, a rear fixing sleeve 7, an inner needle winding button 5a, and an outer needle winding button 5b. The front fixing sleeve 6 is provided with a clamping groove for clamping with the substrate 9a, and is locked with the substrate 9a through a front locking buckle 9l. 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. The rear fixing sleeve 7 is sleeved outside the inner housing 9 from the rear of the inner housing 9 for protecting the inner housing 9 and its internal components. Both sides of the rear fixing sleeve 7 are provided with locking holes that cooperate with the outer housing locking buckle 9m. The rear fixing sleeve 7 is also provided with a trigger button 7a. When the locking hole cooperates with the outer housing locking buckle 9m to lock, the trigger button 7a is located above the inner needle seat locking hook 4a1 of the inner needle seat 4a after winding. After pressing the trigger button 7a, the trigger button 7a pushes the inner needle seat locking 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 shifting block 10 has a through hole, and the diameter of the through hole is larger than the diameter of the end 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 operating hand position 111 is provided at the end of the handle 11, and the diameter of the operating hand position is larger than the diameter of the through hole, such as a circular plate structure, so that the operating hand position can be further used for limiting. In the embodiment of the present invention, when the shifting block 10 is adjusted, it includes two gears. Two handles 11 are provided on the shifting block 10. When adjusting the gear, when the shifting block 10 is in the first gear, the operating hand position on one side is attached to the outer wall of the rear fixing sleeve 7, and when in the second gear, the operating 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, the rear fixing sleeve 7 is provided with a half-circle protruding edge portion 7b on the outer periphery of the trigger button 7a. 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 in front of the trigger button 7a. Since when the hand grasps the outer housing, usually the finger (especially the thumb) is prone to a sliding motion from front to back, (when a doctor operates the puncture needle, different hand-holding positions may need to be switched, and the sliding of the finger will be very frequent), it is very easy to touch the trigger button 7a and cause mis-triggering. Therefore, the edge portion 7b provided on the trigger button 7a can effectively prevent mis-triggering from occurring, 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, which 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 stop 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] For the fully automatic puncture needle provided by the embodiment of the present invention, the puncture operation is as follows:

[0057] Manually press the inner needle winding button 5a so that the inner needle seat hook 4a1 of the inner needle seat 4a hangs 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 hangs 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 fired.

[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. Press the trigger button 7a. 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 shifting 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 shifting block 10 is in the first gear, before the inner needle seat 4a hits the trigger receiving block 8b on the linkage rod 8 during its movement after being triggered, it first hits the trigger receiving block 8b on the linkage rod 8. Through the linkage rod 8, the trigger inclined surface 8c1 on the linkage rod 8 drives 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 shifting 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 shifting 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 moves with the gear shifting block 10, 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. 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 hooks 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 shear 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 shifting 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 sets of gear shifting structures are provided on the gear shifting block. By switching different gear shifting structures, the inner needle assembly and the outer needle assembly can be switched to different stroke distances, and thus 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 shifting 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 constitute a limitation on 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. An adjustment component for a fully automatic puncture needle, which is arranged in a puncture device. The puncture device has an outer housing, an inner housing, an inner needle assembly and an outer needle assembly. Characterized in that, The adjustment component includes an adjustment block (10) that can slide left and right in the inner housing. The first side of the adjustment block (10) includes two groups of adjustment structures arranged side by side perpendicular to the needle shooting direction. Each group of adjustment structures includes two blocking surfaces (10a, 10b) perpendicular to the needle shooting direction, which are respectively used to block the inner needle assembly and the outer needle assembly. The two blocking surfaces (10a, 10b) of the same group of adjustment structures are flush, and the blocking surfaces (10a, 10b) of different groups of adjustment structures have a height difference along the needle shooting direction.

2. The adjustment component for a fully automatic puncture needle according to claim 1, Characterized in that, The two blocking surfaces (10a, 10b) in the same group of adjustment structures are arranged at intervals.

3. The adjustment component for a fully automatic puncture needle according to claim 1, Characterized in that, One end or both ends of the adjustment block (10) are connected with a handle (11).

4. The adjustment component for a fully automatic puncture needle according to claim 3, Characterized in that, It further includes an operation hand position (111). The handle (11) is rod-shaped. The first end of the handle (11) is perpendicularly connected to the adjustment block (10), and the second end is connected to the operation hand position (111).

5. The adjustment component for a fully automatic puncture needle according to claim 4, Characterized in that, A plurality of grooves (11a) for engaging with the housing of the fully automatic puncture needle are provided on the outer wall of the handle (11), and the plurality of grooves (11a) are arranged at intervals along the length direction of the handle (11).

6. The adjustment component for a fully automatic puncture needle according to any one of claims 1 to 5, Characterized in that, The opposite side of the first side of the adjustment block (10) is a plane, and the plane is perpendicular to the needle shooting direction.

7. The adjustment component for a fully automatic puncture needle according to any one of claims 3 to 5, Characterized in that, The handle (11), the operation hand position (111) and the adjustment block (10) are of an integral structure.

8. The adjustment component for a fully automatic puncture needle according to any one of claims 1 to 5, Characterized in that, The adjustment block (10) further includes a cushion block (12). The cushion block (12) is located on the first side of the adjustment block (10), and the cushion block (12) is connected to the end of the adjustment block (10).

9. A fully automatic puncture needle, Characterized in that, It includes an inner needle assembly, an outer needle assembly and the adjustment component for a fully automatic puncture needle according to any one of claims 1 to 8.

10. The fully automatic puncture needle according to claim 9, Characterized in that, The inner needle assembly and the outer needle assembly respectively include abutting ends for abutting against the adjustment block (10).

Images