An excitation 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 an activation structure of a fully automatic puncture needle and a fully automatic puncture needle. The activation structure includes an outer housing, a trigger button, and a blocking structure; the trigger button extends from the inside of the outer housing to the outside of the outer housing, and the blocking structure is arranged on the surface of the outer housing, and the blocking structure is arranged entirely or partially around the outside of the trigger button. According to the technical solution provided by the present invention, a blocking structure is arranged around the trigger button, so that the probability of a doctor accidentally touching the trigger button when using the puncture needle can be reduced, thereby reducing the probability of the trigger button being accidentally triggered, and making the puncture needle safer to use.

Description

Technical Field

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

[0002] Under the guidance of ultrasound, guiding a puncture needle to a target position in the human body 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 the structure of an inner needle and an outer needle. When in use, first trigger the inner needle to puncture the target area, and then trigger the outer needle 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] When using a biopsy needle, a doctor needs to hold the outer shell of the biopsy needle, and the trigger buttons of the inner needle seat and the outer needle seat are generally also set on the outer shell. Therefore, during the puncture operation, it is very likely to have an accidental triggering operation caused by accidentally touching the trigger button, which may bring potential safety hazards and may even lead to medical accidents in severe cases. Summary of the Invention

[0004] The present invention provides an excitation structure of a fully automatic puncture needle and a fully automatic puncture needle. A blocking structure is provided on the outside of the trigger button, which can reduce the probability of accidental triggering caused by accidentally touching the trigger button, thereby improving the safety of using the puncture needle.

[0005] In one aspect of the present invention, an excitation structure of a fully automatic puncture needle is provided, including an outer shell body, a trigger button and a blocking structure; the trigger button extends from the inside of the outer shell body to the outside of the outer shell body, and the blocking structure is provided on the surface of the outer shell body, and the blocking structure is arranged to completely surround or partially surround the periphery of the trigger button.

[0006] Optionally, the blocking structure is a strip-shaped edge portion, and the height of the edge portion protruding from the surface of the outer shell body is not less than the height of the trigger button from the surface of the outer shell body.

[0007] Optionally, a hole is provided on the outer shell body, the trigger button is arranged in the hole, and is connected to the outer shell body through an elastic structure; the blocking structure is arranged to completely surround or partially surround the periphery of the trigger button.

[0008] Optionally, the outer surface of the trigger button is flush with the outer surface of the outer shell body.

[0009] Optionally, the outer surface of the outer shell body has a gripping area, and the blocking structure is located between the through hole and the gripping area.

[0010] Optionally, the outer surface of the trigger button and / or the gripping area is provided with anti-slip lines.

[0011] Optionally, the height of the protrusions of the anti-slip pattern is less than the height of the blocking structure.

[0012] Optionally, the blocking structure and the housing are integrally formed.

[0013] Another aspect of the present invention further provides a fully automatic puncture needle, including an inner needle seat, an outer needle seat, and an actuating structure of the above-mentioned fully automatic puncture needle; wherein, the inner needle seat and the outer needle seat are arranged inside the inner housing, and the trigger button is used to actuate the inner needle seat and / or the outer needle seat.

[0014] Optionally, the inner surface of the trigger button is provided with a protrusion for driving the inner needle seat and / or the outer needle seat.

[0015] According to the technical solution provided by the present invention, a blocking structure is arranged around the trigger button, so that the probability of a doctor accidentally touching the trigger button when using the puncture needle can be reduced, thereby reducing the probability of the trigger button being accidentally triggered and making the puncture needle safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

[0022] Figure 6 is a front view of the front end of the inner housing of the fully automatic puncture needle provided by the embodiment of the present invention;

[0023] Figure 7 is a schematic structural view of the rear stop of the fully automatic puncture needle provided by the embodiment of the present invention;

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

[0025] Figure 9 is Figure 8 The sectional view taken along line “A - A” in

[0026] Figure 10 Figure 7 is a schematic structural view of the linkage rod in the fully automatic puncture needle provided by an embodiment of the present invention;

[0027] Figure 11 Figure 11 is a schematic structural view of the shift block in the fully automatic puncture needle provided by an embodiment of the present invention;

[0028] Figure 12 Figure 15 is a schematic structural view of the shift block from another perspective in the fully automatic puncture needle provided by an embodiment of the present invention;

[0029] Figure 13 Figure 19 is a schematic structural view of the winding - up button in the fully automatic puncture needle provided by an embodiment of the present invention;

[0030] Figure 14 Figure 23 is a schematic structural view of the outer needle holder in the fully automatic puncture needle provided by an embodiment of the present invention;

[0031] Figure 15 Figure 27 is the front view of the fully automatic puncture needle without the outer shell provided by an embodiment of the present invention;

[0032] Figure 16 Figure 31 is the sectional view of the fully automatic puncture needle without the outer shell provided by an embodiment of the present invention;

[0033] Figure 17 Figure 35 is the sectional view of the fully automatic puncture needle without the outer shell provided by an embodiment of the present invention;

[0034] Figure 18 Figure 39 is the sectional view of the fully automatic puncture needle in the first - gear state without the outer shell provided by an embodiment of the present invention;

[0035] Figure 19 Figure 43 is the sectional view of the fully automatic puncture needle in the second - gear state without the outer shell provided by an embodiment of the present invention. Detailed Embodiments

[0036] The following further elaborates on the present application in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant content and do not limit the present application. For the sake of simplicity, in the description of each embodiment 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, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0038] Figure 1It is a schematic structural diagram of a fully automatic puncture needle provided by an embodiment of the present invention; Figure 2 It is a front view of a fully automatic puncture needle provided by an embodiment of the present invention; Figure 3 It is a sectional view of a fully automatic puncture needle provided by an embodiment of the present invention; Figure 4 It is an exploded view of a fully automatic puncture needle provided by an embodiment of the present invention. As Figures 1 to 4 shown, the fully automatic puncture needle includes an outer housing, an inner housing, 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.

[0039] 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 taken as the front, and the side of the outer housing with the trigger button is taken as the top.

[0040] Figure 5 It is a schematic structural diagram of the inner housing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 6 It is a front view of the front end of the inner housing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 7 It is a schematic structural diagram of the rear stop in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 8 It is a top view of the inner housing in the fully automatic puncture needle provided by an embodiment of the present invention; Figure 9 is Figure 8 The sectional view at "A-A" in Figures 1 to 9 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. An inner needle seat lock hook 4a1 that can be locked or unlocked with the locking block 9f of the inner housing 9 is provided on the inner needle seat 4a, and a guide hole (not shown) for the inner needle seat guide rod 3a to pass through. 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 are respectively abutted against the inner needle seat 4a and the rear stop 9e.

[0041] Figure 14 It is a schematic structural diagram 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 14As shown in the figure, 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 housing 9, and a guide hole (not shown) through which the outer needle seat guide rod 3b passes. In addition, an outer needle button connecting 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 stop block 9e.

[0042] 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 seat 4a and causing the linkage assembly to move together 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 impacts the outer needle seat locking 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 seat 4b is triggered, and the outer needle 1b pops out under the action of the outer needle seat spring 2b. Thus, after the inner needle 1a and the inner needle seat 4a pop out, the outer needle 1b and the outer needle seat 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 adjustment assembly, and the specific avoidance method is referred to the subsequent description.

[0043] Figure 11 is a schematic structural view of the gear adjustment block in the fully automatic puncture needle provided by the embodiment of the present invention; Figure 12 is a schematic structural view of the gear adjustment 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 adjustment assembly includes a gear adjustment block 10 that slides left and right in the inner housing 9, a handle 11, and a cushion block 12.

[0044] Multiple blocking surfaces can be provided on the gear adjustment 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 without an outer shell provided by the embodiment of the present invention; Figure 16 is the sectional view of the fully automatic puncture needle without an outer shell provided by the embodiment of the present invention; Figure 17It is a cross-sectional view of the fully automatic puncture needle provided by the embodiment of the present invention without the outer shell; Figure 18 It is a cross-sectional view of the first gear state of the fully automatic puncture needle provided by the embodiment of the present invention without the outer shell; 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 the outer shell. As Figures 15 to 19 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 range of the inner needle 1a and the outer needle 1b is 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 range of the inner needle 1a and the outer needle 1b is shorter.

[0045] Continue to refer to Figures 15 to 19 and Figures 5 to 9 , as shown in the figure, the handle 11 is arranged on the left and right sides of the shifting block 10 and extends out of the inner shell and the outer shell for manually adjusting the position of the shifting block 10 to realize the gear adjustment. The part of the handle 11 extending out of the shell 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 is switched. Correspondingly, the shifting positioning block 9j on the inner shell 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 gear shifting is completed.

[0046] As Figure 11 and Figure 12 shown, a cushion block 12 is also arranged on the shifting block 10 and is fixedly connected to the shifting block 10 through an elastic rod. When performing the gear shifting operation, 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 distance of the inner needle seat 4a and the outer needle seat 4b is smaller, after the inner needle seat 4a is triggered, it cannot activate the linkage assembly (the moving distance is shortened, resulting 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 cushion block 12 is used as a compensation for the smaller 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.

[0047] AsFigures 5 to 9 As 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.

[0048] 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.

[0049] 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 strikes against the groove 11a to produce a striking 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 strikes against different parts of the handle 11 to produce different sounds, increasing the distinguishability of the 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 at the front part of the inner housing 9 to prevent it from falling off. The outer housing 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 housing locking buckle 9m includes a boss protruding outward and an elastic connecting rod for increasing its elastic deformation ability.

[0050] Figure 13 It is a schematic structural diagram of the stringing button on the full-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 is provided with 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 is provided with 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 are provided with locking holes for cooperating with the outer housing locking buckle 9m. The rear fixing sleeve 7 is also provided with a trigger button 7a. When the locking holes are mutually cooperated and locked with the outer housing 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.

[0051] The area of the rear fixing sleeve 7 corresponding to the handle 11 on the gear shifting block 10 is provided with 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 operating hand position 111 is arranged at the end part of the handle 11, and the diameter of the operating hand position is larger than the diameter of the through hole. For example, a circular plate structure is adopted, and further limiting can be carried out by using the operating hand position. 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 operating 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 operating hand position on the other side is attached to the outer wall of the rear fixing sleeve 7.

[0052] Continue to refer to Figures 1 to 4 、 Figure 13 and Figure 14, as shown in the figure, a semi-circular raised 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 housing by hand, the fingers (especially the thumb) are prone to sliding forward and 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.

[0053] The inner needle winding button 5a has an inner needle pressing surface 5a1, an inner needle button connecting column 5a2 that is clamped with the inner needle button connecting seat 4a3, and an inner needle button guiding column 5a3. When the inner needle button connecting seat 4a3 is clamped with 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 stop block 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 indication labels, or pressing threads with indication functions, are also provided on the inner needle pressing surface 5a1 and the outer needle pressing surface 5b1. The indication 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.

[0054] The fully automatic puncture needle provided by the embodiment of the present invention has the following puncture operation:

[0055] 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.

[0056] 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).

[0057] Under 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 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 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 it 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 by 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.

[0058] 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 shear again through the ends of the inner needle 1a and the outer needle 1b.

[0059] Repeat the above steps multiple times until enough living samples are obtained.

[0060] According to the embodiment 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, achieving the purpose of adjusting the gear 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.

[0061] The above specific embodiments do not constitute a limitation to 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, an outer needle seat and an activation structure. The inner needle seat and the outer needle seat are arranged inside the inner housing and can elastically slide inside the inner housing. The inner housing is arranged inside the outer housing. The trigger button is used to activate the inner needle seat and / or the outer needle seat. The activation structure includes a trigger button and a blocking structure. The trigger button extends from the inside of the outer housing to the outside of the outer housing. The blocking structure is arranged on the surface of the outer housing, and the blocking structure is arranged all around or partially around the periphery of the trigger button; The inner housing includes a locking block. The inner needle seat is provided with an inner needle seat locking hook, and the outer needle seat is provided with an outer needle seat locking hook. Both the inner needle seat locking hook and the outer needle seat locking hook are locked with the locking block. A linkage rod is arranged in the inner housing. The linkage rod is provided with a trigger receiving block and a trigger linkage block. The trigger button is located above the inner needle seat locking hook. When the trigger button drives the inner needle seat locking hook to unlock from the locking block, the inner needle seat transmits force to the trigger receiving block during the movement stroke, so that the trigger linkage block drives the outer needle seat locking hook to unlock from the locking block.

2. The fully automatic puncture needle according to claim 1, characterized in that, The blocking structure is a strip-shaped edge portion (7b), and the height of the edge portion (7b) protruding from the surface of the outer housing is not less than the height of the trigger button (7a) from the surface of the outer housing.

3. The fully automatic puncture needle according to claim 2, characterized in that, The outer housing is provided with a hole, and the trigger button (7a) is arranged in the hole and is connected to the outer housing through an elastic structure; The blocking structure is arranged all around or partially around the periphery of the trigger button (7a).

4. The fully automatic puncture needle according to claim 3, wherein The outer surface of the trigger button (7a) is flush with the outer surface of the outer housing.

5. The fully automatic puncture needle according to claim 4, wherein The outer surface of the outer housing has a gripping area, and the blocking structure is located between the through hole and the gripping area.

6. The fully automatic puncture needle according to claim 5, wherein, The outer surface of the trigger button (7a) and / or the gripping area is provided with anti-slip lines.

7. The fully automatic puncture needle according to claim 6, wherein, The protruding height of the anti-slip lines is less than the height of the blocking structure.

8. The fully automatic puncture needle according to claim 1, wherein The blocking structure and the outer housing are an integrally formed structure.

9. The fully automatic puncture needle according to claim 1, wherein, The inner surface of the trigger button (7a) is provided with a protruding portion for driving the inner needle seat (4a) and / or the outer needle seat (4b).

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