A fully automatic puncture needle excitation component and a fully automatic puncture needle

Abstract

The present invention relates to the technical field of puncture equipment, and in particular to an excitation assembly of a fully automatic puncture needle and a fully automatic puncture needle, wherein the excitation device comprises a shifting block and a linkage rod; the end of the first side of the shifting block is provided with at least one set of blocking surfaces; the linkage rod is provided with a trigger receiving block and a trigger linkage block; the inner needle seat, the outer needle seat and the linkage rod are located on the side of the shifting block provided with the blocking surface, the trigger receiving block is located between the inner needle seat and the blocking surface, and has a limited distance from the blocking surface, and the trigger linkage block is in contact with the second end of the outer needle seat; during linkage excitation, the inner needle seat abuts against the trigger receiving block and drives the linkage rod to move synchronously toward the blocking surface, and the trigger linkage block moves together with the linkage rod, thereby pushing the outer needle seat to trigger, and realizing linkage excitation of the inner needle seat and the outer needle seat. In the present technical solution, the excitation structure has the advantages of simple structure and easy operation, and can reduce the probability of excitation jam; the shifting block can also be set as a structure with multiple blocking surfaces, so as to adjust the puncture depth of the inner and outer needles.

Description

Technical Field

[0001] The invention relates to the technical field of puncture equipment, and in particular to an excitation component of a full-automatic puncture needle and a full-automatic puncture needle. Background Art

[0002] Guiding the puncture needle to the target site of the human body under ultrasound guidance to achieve cytological biopsy, histological biopsy, cyst aspiration and treatment is currently an important means of disease monitoring and treatment. The puncture needle is an important tool in this type of ultrasound-guided surgery. The puncture needle currently used for biopsy usually adopts an inner and outer needle structure. When used, 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 and outer needle needles, a part of the tissue in the target area is cut off and placed in the accommodating cavity at the end of the inner needle needle. It is taken out together with the puncture needle when it is pulled out for biopsy.

[0003] However, since the target areas to be acquired have different sizes and shapes, doctors usually select biopsy needles with different ranges (the displacement of the inner and outer needles after stimulation) according to the specific conditions of the target area to meet the needs of the biopsy. In order to meet the needs of multi-range use of puncture needles, a puncture needle with adjustable range is currently on the market, which adjusts the range of the inner and outer needles through complex transmission structures such as adjustment knobs. Although range adjustment is achieved, its complex structure will cause a significant increase in production costs, thereby increasing surgical costs, and the complex structure affects the stability of the biopsy needle, which may cause jamming or even more serious medical accidents. Summary of the invention

[0004] The present invention provides an excitation component of a fully automatic puncture needle and a fully automatic puncture needle. The excitation component can realize linkage excitation and also meet the multi-gear adjustment of an inner needle and an outer needle.

[0005] One aspect of the present invention provides an excitation device for a fully automatic puncture needle, which is used for the linkage excitation of the inner needle seat and the outer needle seat of the fully automatic puncture needle, and includes a shifting block and a linkage rod; at least one group of blocking surfaces are provided at the end of the first side of the shifting block; a trigger receiving block and a trigger linkage block are provided on the linkage rod; the inner needle seat, the outer needle seat and the linkage rod are located on the side of the shifting block where the blocking surface is provided, the trigger receiving block is located between the inner needle seat and the blocking surface, and has a limited distance from the blocking surface, and the trigger linkage block is in contact with the second end of the outer needle seat; during linkage excitation, the inner needle seat abuts against the trigger receiving block and drives the linkage rod to move synchronously toward the blocking surface, so that the trigger linkage block moves together with the linkage rod, thereby pushing the outer needle seat to be triggered, thereby realizing the linkage excitation of the inner and outer needle seats.

[0006] Optionally, the first side surface of the shifting block includes two groups of shifting structures arranged in parallel and perpendicular to the needle shooting direction; each group of shifting structures includes two blocking surfaces that are perpendicular to the needle shooting direction and spaced apart in the direction, and are respectively used to block the inner needle assembly and the outer needle assembly; the two blocking surfaces of the same group of shifting structures are flush, and the blocking surfaces of different groups of shifting structures have a height difference along the needle shooting direction; the moving directions of the inner needle seat and the outer needle seat are perpendicular to the blocking surfaces, and different groups of blocking surfaces can be switched during movement to adjust the moving strokes of the inner needle seat and the outer needle seat, thereby achieving the inner and outer needle shifting effect.

[0007] Optionally, the trigger receiving block is arranged at the first end of the linkage rod, and the trigger linkage block is arranged at the second end of the linkage rod.

[0008] Optionally, the shift block also includes a pad block, which is located on the first side of the shift block and is connected to the top of the shift block; the linkage rod also includes an avoidance groove for connecting the pad block, the avoidance groove is located between the trigger receiving block and the trigger linkage block, and the depth of the avoidance groove is less than the thickness of the pad block; when the shift block switches to the specified blocking surface, the pad block is inserted into the avoidance groove, and when the linkage is triggered, the inner needle seat abuts against the pad block and drives the linkage rod to move synchronously toward the blocking surface.

[0009] Optionally, a blocking surface of another group is arranged between two blocking surfaces of the same group, so that the two blocking surfaces of the same group are arranged at an interval.

[0010] Optionally, handles are connected to the shift block on both sides of the blocking surface, a first end of the handle is vertically connected to the shift block, and a second end of the handle is connected to an operating handle.

[0011] Optionally, the handle is rod-shaped, and a plurality of grooves for engaging with the housing of the full-automatic puncture needle are provided on the outer wall of the handle, and the plurality of grooves are spaced apart along the length direction of the handle.

[0012] Optionally, the linkage rod is in a rectangular shape, the trigger receiving block and the avoidance groove are located on the first side surface of the first end of the linkage rod (8), the trigger linkage block is located on the second side surface of the second end of the linkage rod, and the first side surface and the second side surface are adjacent surfaces.

[0013] Optionally, it also includes a guide block for connecting to the connecting rod guide groove of the puncture needle, the guide block is located at the bottom of the first end of the linkage rod and is fixedly connected to the linkage rod.

[0014] Another aspect of the present invention provides a fully automatic puncture needle, including the above-mentioned activation device of the fully automatic puncture needle.

[0015] According to the technical solution provided by the present invention, during the excitation operation, it is only necessary to trigger the inner needle seat, and then the inner needle seat applies force to the trigger receiving block of the linkage rod, driving the linkage rod to move synchronously with the inner needle seat, and the linkage rod drives the trigger linkage block to move, and the outer needle seat is triggered by the trigger linkage block, thereby completing the linkage excitation of the inner needle seat and the outer needle, wherein the inner needle seat moves a certain distance before contacting the trigger receiving block, thereby allowing an excitation interval to exist between the inner needle seat and the outer needle seat, meeting the requirement of sequential insertion of the inner and outer needles, and the excitation structure has the advantages of simple structure and easy operation, and can reduce the probability of excitation jam. In addition, in the technical solution provided by the present invention, the gear adjustment block can also be set to a structure with multiple blocking surfaces, thereby adjusting the puncture depth of the inner and outer needles. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0021] 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;

[0022] 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;

[0023] 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;

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

[0025] Fig. 9 yes Figure 8 Sectional view at "AA" in the figure;

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

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

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

[0029] Fig.13 It 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;

[0030] Fig.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;

[0031] Fig.15 This is a front view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0032] Fig.16 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0033] Fig.17 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention;

[0034] Fig.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;

[0035] Fig.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

[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 4As 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; Fig. 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] Fig.14 Schematic diagram of the structure of the inner and outer needle seats of the fully automatic puncture needle provided by the embodiment of the present invention. Figures 1 to 9 ,as well as Fig.14 As 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 has an outer needle seat 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) for the outer needle seat guide rod 3b to pass through. In addition, the front end of the outer needle seat 4b is fixedly provided with an outer needle button connecting seat 4b3 for connecting the outer needle stringing button 5b. The outer needle seat spring 2b is penetrated on the outer needle seat guide rod 3b, and its two ends are respectively against the outer needle seat 4b and the rear stopper 9e.

[0043] Fig.10 Schematic diagram of the structure of the linkage rod in the fully automatic puncture needle provided by the embodiment of the present invention. Fig.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.

[0044] Fig.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;

[0045] Fig.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. Fig.11 and Fig.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. Fig.15 This is a front view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Fig.16 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Fig.17 is a cross-sectional view of the fully automatic puncture needle without a housing provided by an embodiment of the present invention; Fig.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; Fig.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 shift block 10 has two first blocking surfaces 10a and two second blocking surfaces 10b. According to the left and right sliding of the shift block 10, the inner needle seat 4a and the outer needle seat 4b can be selected to hit 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 hit 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 hit the first blocking surface 10a, the distance they move is large, that is, the range of the inner needle 1a and the outer needle 1b is long, and when the inner needle seat 4a and the outer needle seat 4b hit the second blocking surface 10b, the distance they move is small, that is, the range of the inner needle 1a and the outer needle 1b is short.

[0047] Continue to refer Figures 15 to 19 ,as well as Figures 5 to 9 As shown in the figure, the handle 11 is arranged on the left and right sides of the gear shift block 10, and extends out of the inner shell and the outer shell for manually adjusting the position of the gear shift block 10 to achieve the adjustment of the gear position. The handle 11 extending out of the shell is a round rod, and the handle 11 on each side has two grooves 11a, and the grooves 11a are used for locking after switching the gear position. Corresponding to the grooves 11a, the gear shift positioning block 9j on the inner shell 9 clamps the round rod of the handle 11 when the handle 11 moves. When the gear shift positioning block 9j slides from the round rod into the groove 11a, it hits the groove 11a and makes a sound of impact, indicating that the gear shift is completed.

[0048] like Fig.11 and Fig.12 As shown, a cushion block 12 is also provided on the shift block 10, which is fixedly connected to the shift block 10 through an elastic rod. When the shift operation is performed, the cushion block 12 slides left and right with the shift block 10. When the shift 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 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 excite the linkage assembly (the shortened moving distance causes the inner needle seat 4a to have no contact with the linkage assembly), and thus cannot excite the outer needle seat 4b. In the embodiment of the present invention, the cushion block 12 serves as a compensation for the reduced moving distance of the inner needle seat 4a in the second gear. After the cushion block 12 is provided, the shift block 10 can also successfully excite the outer needle seat 4b in the second gear. 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] like 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 Fig.11 and Fig.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] Fig.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 , Fig.13 and Fig.14 As shown, the outer shell 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 slot for engaging with the base plate 9a, and is locked with the base plate 9a through a front locking buckle 91. The front fixing sleeve 6 has a guide ring 6a for passing the inner needle stringing button 5a and the outer needle stringing button 5b. The rear fixing sleeve 7 is sleeved on the outer shell 9 from the rear of the inner shell 9 to protect the inner shell 9 and its internal components. The two sides of the rear fixing sleeve 7 have locking holes that cooperate with the outer shell locking buckle 9m. The rear fixing sleeve 7 also has a trigger button 7a. When the locking hole and the outer shell locking buckle 9m cooperate and lock with each other, 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 to disengage 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 rear fixed sleeve 7 has a through hole in the area corresponding to the handle 11 on the gear adjustment block 10. The diameter of the through hole is larger than the diameter of the end of the handle 11. When the handle 11 is close to the inner shell 9, it can be completely immersed in the through hole on the rear fixed sleeve 7. In addition, an operating hand position 111 is set at the end of the handle 11. The diameter of the operating hand position is larger than the diameter of the through hole. If a circular plate structure is adopted, the operating hand position can be further used for limiting. In the embodiment of the present invention, the gear block 10 includes two gears when adjusted. Two handles 11 are set on the gear block 10. During the gear adjustment operation, when the gear block 10 is in the first gear, the operating hand position on one side is in contact with the outer wall of the rear fixed sleeve 7. When it is in the second gear, the operating hand position on the other side is in contact with the outer wall of the rear fixed sleeve 7.

[0054] Continue to refer Figures 1 to 4 , Fig.13 and Fig.14As shown in the figure, the rear fixing sleeve 7 is provided with a half-circle raised flange 7b on the outer periphery of the trigger button 7a, the height of the flange 7b is slightly higher than the height of the trigger button 7a protruding from the rear fixing sleeve 7, and the flange 7b is located in front of the trigger button 7a. When the hand grasps the outer shell, the fingers (especially the thumb) usually slide from front to back (when the doctor operates the puncture needle, he may need to switch different hand grip positions, and the sliding of the fingers will be very frequent), and it is very easy to touch the trigger button 7a and cause an accidental trigger. Therefore, the flange 7b provided on the trigger button 7a can effectively prevent the occurrence of an accidental trigger, thereby ensuring the safety of the puncture needle.

[0055] The inner needle winding button 5a has an inner needle pressing surface 5a1, an inner needle button connecting column 5a2 and an inner needle button guide column 5a3 which are engaged with the inner needle button connecting seat 4a3. When the inner needle button connecting seat 4a3 is engaged with the inner needle button connecting column 5a2, a complete column is formed, which can slide in the winding button slide rail 9k. The inner needle button guide column 5a3 is slidably arranged in the gap between the guide ring 6a and the front stopper 9d to maintain stability. The inner needle button connecting column 5a2 and the inner needle button guide 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 guide column 5b3. The outer needle winding button 5b and the inner needle winding button 5a are symmetrical with each other about the axis, and will not be described one by one here. Among them, pressing threads or indicator 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 indicator labels can be marked with ① and ②, etc., to serve as a reminder of the operation sequence. The pressing threads increase the friction.

[0056] The fully automatic puncture needle provided in the embodiment of the present invention performs the puncture operation as follows:

[0057] Manually press the inner needle winding button 5a, so that the inner needle seat lock hook 4a1 of the inner needle seat 4a is hooked 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 lock hook 4b1 of the outer needle seat 4b is hooked 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 the ready-to-be-activated state.

[0058] The gear adjustment assembly is adjusted according to the puncture requirements, that is, the handle 11 is pushed to move the gear adjustment block 10 and adjust it to the desired gear position (the gear position can only be adjusted when both the inner needle and the outer needle are in the wound state).

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

[0060] The outer needle winding button 5b is pressed again, so that the outer needle seat lock hook 4b1 of the outer needle seat 4b is hooked 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 tissue can be taken out from the storage groove 1a1. Then, the outer needle 1b is released again, and the ends of the inner needle 1a and the outer needle 1b are sheared again.

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

[0062] According to the embodiment provided by the present invention, the inner needle assembly and the outer needle assembly can be stopped within a limited stroke by using the blocking surface on the gear-shifting structure, wherein multiple gear-shifting structures are arranged on the gear-shifting block, and by switching different gear-shifting structures, the inner needle assembly and the outer needle assembly can be switched to different stroke distances, and then the puncture depths of the inner needle and the outer needle can be switched, thereby achieving the purpose of puncture needle gear shifting. The gear-shifting assembly 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 implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fully automatic puncture needle excitation device, used for linkage excitation of an inner needle seat (4a) and an outer needle seat (4b) of a fully automatic puncture needle, characterized in that: It comprises a gear adjustment block (10) and a linkage rod (8); The end of the first side of the shifting block (10) is provided with at least one set of blocking surfaces (10a, 10b); The linkage rod (8) is provided with a trigger receiving block (8b) and a trigger linkage block (8c); The inner needle seat (4a), the outer needle seat (4b) and the linkage rod (8) are located on a side of the shifting block (10) provided with the blocking surface (10a, 10b); The trigger receiving block (8b) is located between the inner needle seat (4a) and the blocking surface (10a, 10b) and has a limited distance from the blocking surface (10a, 10b), and the trigger linkage block (8c) is in contact with the second end of the outer needle seat (4b); During linkage excitation, the inner needle seat (4a) abuts against the trigger receiving block (8b) and drives the linkage rod (8) to move synchronously toward the blocking surface (10a, 10b), so as to trigger the linkage block (8c) to move along with the linkage rod (8), thereby pushing the outer needle seat (4b) to be triggered, thereby realizing linkage excitation of the inner needle seat (4a) and the outer needle seat (4b); The trigger receiving block (8b) is arranged at the first end of the linkage rod (8), and the trigger linkage block (8c) is arranged at the second end of the linkage rod (8); The shifting block (10) further comprises a cushion block (12), the cushion block (12) being located at a first side of the shifting block (10), and the cushion block (12) being connected to an end of the shifting block (10); the linkage rod (8) further comprises an avoidance groove (8d) for connecting the cushion block, the avoidance groove (8d) being located between the trigger receiving block (8b) and the trigger linkage block (8c), and the depth of the avoidance groove (8d) being less than the thickness of the cushion block (12); when the shifting block (10) switches to a designated blocking surface (10a, 10b), the cushion block (12) is inserted into the avoidance groove (8d), and when the linkage is triggered, the inner needle seat (4a) abuts against the cushion block (12) and drives the linkage rod (8) to move synchronously toward the blocking surface (10a, 10b); A handle (11) is connected to the shift block (10) on both sides of the blocking surface (10a, 10b); a first end of the handle (11) is vertically connected to the shift block (10); a second end of the handle (11) is connected to an operating handle (111); and the handle (11) extends out of the housing of the fully automatic puncture needle.

2. The fully automatic puncture needle excitation device according to claim 1, characterized in that: The first side surface of the gear shifting block (10) comprises two groups of gear shifting structures arranged in parallel and perpendicular to the needle shooting direction; each group of gear shifting structures comprises two blocking surfaces (10a, 10b) perpendicular to the needle shooting direction and arranged at intervals in the direction, respectively used to block the inner needle assembly and the outer needle assembly; the two blocking surfaces (10a, 10b) 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; The moving directions of the inner needle seat (4a) and the outer needle seat (4b) are perpendicular to the blocking surfaces (10a, 10b), and different groups of blocking surfaces (10a, 10b) can be switched during movement to adjust the moving strokes of the inner needle seat (4a) and the outer needle seat (4b), thereby achieving the inner and outer needle shifting function.

3. The fully automatic puncture needle excitation device according to claim 2, characterized in that: A blocking surface (10a, 10b) of another group is arranged between two blocking surfaces (10a, 10b) of the same group, so that the two blocking surfaces (10a, 10b) of the same group are arranged at an interval.

4. The fully automatic puncture needle excitation device according to claim 3, characterized in that: The handle (11) is rod-shaped, and 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). The plurality of grooves (11a) are arranged at intervals along the length direction of the handle (11).

5. The fully automatic puncture needle excitation device according to claim 1, characterized in that: The linkage rod (8) is in a rectangular shape, the trigger receiving block (8b) and the avoidance groove (8d) are located on the first side surface of the first end of the linkage rod (8), the trigger linkage block (8c) is located on the second side surface of the second end of the linkage rod (8), and the first side surface and the second side surface are adjacent surfaces.

6. The fully automatic puncture needle excitation device according to claim 1, characterized in that: It also includes a guide block (8a) for connecting to the connecting rod guide groove of the puncture needle. The guide block (8a) is located at the bottom of the first end of the linkage rod (8) and is fixedly connected to the linkage rod (8).

7. A fully automatic puncture needle, characterized in that: A fully automatic puncture needle excitation device comprising any one of claims 1 to 6.

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