In-situ sampling biopsy needle device

Abstract

The invention discloses an in-situ sampling biopsy needle device. The in-situ sampling biopsy needle device comprises a shell, a back-and-forth movement module is arranged in the shell, the side, away from a patient, of the back-and-forth movement module is a near end, the other side of the back-and-forth movement module is a far end, and a needle set used for puncture sampling is arranged at the far end; the shell is internally provided with a percussion module and a winding mechanism, the percussion module is used for implementing linkage limitation on the positions of corresponding parts of the reciprocating motion module, and the winding mechanism is used for driving the corresponding parts of the reciprocating motion module to slide relative to the shell; and the elastic assembly is arranged on the reciprocating motion module and is used for driving corresponding parts of the reciprocating motion module to quickly move to a preset position so as to realize reciprocating motion control. The device has the advantages that the puncture precision can be effectively improved, so that the sampling efficiency is improved, and the biopsy sampling safety can be improved, so that patients and medical personnel are not easily injured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more specifically, to an in-situ sampling biopsy needle device. Background Art

[0002] At present, the side groove cutting coaxial biopsy is often used in the clinic to perform soft tissue puncture sampling on patients. The existing coaxial biopsy needle is mainly composed of a firing device and a biopsy needle assembly, and the biopsy needle assembly is mainly composed of an outer needle tube and an inner needle rod.

[0003] In the process of puncture biopsy sampling, the existing coaxial biopsy needle pre-determines the puncture target position under ultrasound or CT images, then winds up the coaxial biopsy needle to put it in a ready-to-fire state, then punctures the needle close to the target tissue based on image guidance and development, and determines the relative position between the tip of the coaxial biopsy needle and the target tissue, thereby estimating the launch trajectory and sampling position of the coaxial biopsy needle, and then operates to fire the coaxial biopsy needle. The inner needle rod is driven by the corresponding elastic part of the firing device to quickly puncture a certain distance to the target sampling area. After reaching the target sampling area, the corresponding elastic part of the firing device drives the outer needle tube to fire and cut the target sampling area, thereby storing the sampled tissue in the inner needle rod, thereby implementing cutting and separation operations on human tissue through coaxial biopsy to achieve biopsy sampling analysis and diagnosis. Although the existing coaxial biopsy needle can meet certain usage requirements, it still has the following problems in the process of puncture biopsy sampling:

[0004] 1. The launch trajectory of the coaxial biopsy needle is prone to deviations estimated by medical staff, resulting in low puncture accuracy and affecting biopsy sampling efficiency;

[0005] 2. There is a large ineffective puncture distance during the puncture sampling process, which is easy to injure the patient's dangerous parts and cause medical accidents;

[0006] 3. Misoperation is prone to occur during use, which may cause the coaxial biopsy needle to be accidentally triggered and injure medical staff, making it difficult to meet actual application needs.

[0007] How to solve the above problems has become a technical problem that needs to be solved urgently. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide an in-situ sampling biopsy needle device which can effectively improve the puncture accuracy to enhance the sampling efficiency and can improve the safety of biopsy sampling to reduce the risk of harming patients and medical staff.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] An in-situ sampling biopsy needle device comprises a shell; a reciprocating motion module is arranged in the shell, and the side of the reciprocating motion module away from the patient is the proximal end, and the other side is the distal end and a needle group for puncture sampling is arranged at the end; a firing module for implementing linkage limitation on the position of the corresponding parts of the reciprocating motion module is arranged in the shell, and a winding mechanism for driving the corresponding parts of the reciprocating motion module to slide relative to the shell is also arranged in the shell; and also includes an elastic component arranged on the reciprocating motion module for driving the corresponding parts of the reciprocating motion module to move quickly to a predetermined position to realize reciprocating motion control.

[0011] Preferably, the reciprocating motion module includes a sliding component arranged in the shell, a reciprocating motion base with a first snap-locking groove is provided at the distal end of the sliding component, and a winding base with a second snap-locking groove is provided between the proximal end of the sliding component and the reciprocating motion base, and the bottom of the winding base can extend downward to the top of the winding mechanism, and also includes an inner needle rod base arranged on the winding base and capable of sliding relative to the firing module, wherein the elastic component is arranged on the sliding component and the winding base, and the corresponding components of the needle group are arranged on the inner needle rod base.

[0012] Preferably, the sliding component includes a first stopper and a second stopper arranged on the distal end and proximal side walls of the shell, a sliding shaft is provided between the first stopper and the second stopper, and one end of the sliding shaft passes through the second stopper and extends to the outside to be connected with an adjusting knob, and a third stopper is detachably provided on the sliding shaft, wherein the reciprocating motion base is slidably provided on the sliding shaft and is located between the first stopper and the third stopper, and the winding base is slidably provided on the sliding shaft and is located between the second stopper and the third stopper.

[0013] Preferably, the winding base includes a winding base sliding block slidably arranged on the sliding shaft and having a second snap lock groove that is engaged with the second snap lock to achieve position locking. A winding pin extending downward to the top of the winding mechanism is provided at the bottom of the winding base sliding block. A positioning pin connected to and cooperated with the inner needle rod base is also provided on the winding base sliding block at the top of one end of the second snap lock groove. The winding base sliding block also includes a second fixing pin of the elastic part arranged on the top of one end of the winding base sliding block away from the positioning pin and used to connect and cooperate with the elastic component.

[0014] Preferably, the inner needle bar base includes an inner needle bar base slider which is arranged above the upper string base sliding block and cooperates with the positioning pin to achieve position limitation, and a first base and a second base are respectively provided at both ends of one side of the inner needle bar base slider, which are located above the firing module and in sliding contact with the top of the firing module, and an axis connected to the elastic component is provided between the first base and the second base, and a fixed key pin 2 connected to the corresponding part of the needle group is provided at the top of the inner needle bar base slider, and a push sliding key is also provided on the other side wall of the inner needle bar base slider away from the axis, and the push sliding key extends out of the shell and can slide along the corresponding groove of the shell.

[0015] Preferably, the firing module includes a sliding cover arranged on the inner wall of the corresponding side of the shell and the top of the sliding cover is in sliding contact with the first base and the second base, wherein the inner needle rod base slider is limited in position by the cooperation of the first base, the second base and a limit block arranged on the top of the sliding cover, and a firing rod is provided under the sliding cover to cooperate with a predetermined groove of the shell to realize two-way reciprocating sliding adjustment, and also includes a trigger pin assembly, a fixing pin assembly and a buckle assembly arranged on the top of the firing rod, and the buckle assembly and the fixing pin assembly are connected to the corresponding components of the elastic assembly, and a firing button for pressing and driving the firing rod to slide along the shell is provided at the lower ends of both sides of the firing rod.

[0016] Preferably, the buckle assembly includes a first buckle and a second buckle movably arranged at both ends of the top of the firing rod through the fixing pin assembly, wherein the corresponding ends of the first buckle and the second buckle are connected to the corresponding components of the elastic assembly and the position is limited by the trigger pin assembly, and the first buckle and the second buckle are respectively engaged with the first buckle locking groove and the second buckle locking groove to achieve position locking.

[0017] Preferably, the fixing pin assembly includes a first fixing pin and a second fixing pin for movably mounting the corresponding ends of the first buckle and the second buckle on the corresponding end of the firing rod, and a third fixing pin is provided on the firing rod near the end of the second fixing pin and located on one side of the second buckle. The assembly also includes a fourth fixing pin and a fifth fixing pin provided on the inner wall of the corresponding side of the shell for limiting the elastic member of the elastic assembly connected to the corresponding ends of the first buckle and the second buckle to a predetermined position.

[0018] Preferably, the trigger pin assembly includes a first trigger pin arranged on the firing rod near one end of the first fixing pin and located on one side of the first buckle, and also includes a second trigger pin arranged on the firing rod near the top of one end of the fifth fixing pin for limiting the position of the second buckle.

[0019] Preferably, the upper string mechanism includes an upper string body arranged on the shell and located below the upper string base sliding block, a groove is provided on the top of one side of the upper string body and is connected and cooperated with the upper string pin to realize one-way limit control, and a pin hole is provided on the outer side wall of one end of the upper string body close to the groove and is sleeved and cooperated with the corresponding component of the elastic component.

[0020] Preferably, the elastic component includes a first elastic member, a second elastic member, a third elastic member, and a fourth elastic member; two ends of the first elastic member are respectively connected to the reciprocating motion base and the upper string base sliding block, two ends of the second elastic member are respectively connected to the upper string base sliding block and the second stop block, one end of the third elastic member is limited on the inner wall of the corresponding side of the shell by the fourth fixing pin and the other end of the third elastic member is connected to the corresponding end of the first buckle, one end of the fourth elastic member is limited on the inner wall of the corresponding side of the shell by the fifth fixing pin and the other end of the fourth elastic member is connected to the corresponding end of the second buckle.

[0021] Preferably, the elastic component further comprises an eighth elastic member, one end of the eighth elastic member is connected to an end of the shaft close to the first base, and the other end of the eighth elastic member is connected to the limit block.

[0022] Preferably, the needle group includes an outer needle tube assembly arranged on the top of the reciprocating motion base, and an inner needle rod assembly arranged on the top of the inner needle rod base slider, and the puncture end of the inner needle rod assembly is sleeve-fitted with the outer needle tube assembly.

[0023] Preferably, the outer needle tube assembly includes an outer needle tube seat arranged on the top of the reciprocating motion base and the outer needle tube seat has a through cavity for the puncture end of the inner needle rod assembly to pass through, and an outer needle tube for being sleeved and matched with the puncture end of the inner needle rod assembly is provided at one end of the through cavity of the outer needle tube seat away from the inner needle rod assembly.

[0024] Preferably, the inner needle rod assembly includes an inner needle rod seat which is arranged at the top of the inner needle rod base slider and connected to the fixed key pin 2, and the position of the inner needle rod seat corresponds to the position of the outer needle tube seat. An inner needle rod with a sampling chamber is provided on one end of the inner needle rod seat close to the outer needle tube seat, which can extend into the interior of the outer needle tube to perform sampling operations during operation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the present invention, before sampling, the inner needle tube end of the needle group and the sampling chamber are located in the cavity of the outer needle tube end of the needle group, and the needle group, the reciprocating motion module, the firing module, the winding mechanism, and the elastic component are all in the predetermined positions of the initial state. The operator operates the winding mechanism to wind up the in-situ sampling biopsy needle device. At this time, the reciprocating motion module, the firing module, and the elastic component are all moved to the predetermined positions of the ready-to-fire state, and the corresponding components of the elastic component are stretched to generate elastic force; the operator then holds the shell to puncture the inner needle tube end of the needle group together with the outer needle tube end into the target sampling position in the patient's body according to the puncture depth requirement, thereby effectively improving the puncture accuracy to enhance the sampling efficiency, and then operates the firing module to work, using the firing module and the reciprocating motion module to puncture the target sampling position in the patient's body. The linkage effect of the moving module, driven by the elastic force of the corresponding elastic component of the elastic component, causes the reciprocating motion module to move from the predetermined position of the ready-to-fire state to the predetermined position of the initial state. In this process, the outer needle tube end of the needle group is driven to move toward the proximal side by the reciprocating motion module, and at the same time, the corresponding component of the elastic component stretches to generate elastic force. At this time, the sampling cavity of the inner needle tube end is exposed in the target sampling position, and the target sampled biopsy tissue enters the sampling cavity of the inner needle tube end of the needle group due to its elasticity. Subsequently, the reciprocating motion module drives the outer needle tube end of the needle group to move toward the distal side under the elastic force of the corresponding component of the elastic component, thereby utilizing the reciprocating motion of the outer needle tube end of the needle group to perform a cutting operation on the target sampled biopsy tissue to retain the biopsy tissue in the sampling cavity of the inner needle tube end of the needle group.

[0027] After the biopsy tissue sampling is completed, the handheld shell withdraws the needle group from the patient's body, and the corresponding components of the reciprocating motion module are operated to drive the inner needle tube end of the needle group to move and extend out of the outer needle tube end of the needle group to expose the sampling cavity and biopsy tissue of the inner needle tube end. At this time, the corresponding components of the elastic component are compressed to generate elastic force, and the medical staff can extract the biopsy tissue from the sampling cavity to achieve the in-situ biopsy sampling operation, and then release the corresponding components of the reciprocating motion module. Under the elastic force of the corresponding components of the elastic component, the corresponding components of the reciprocating motion module and the inner needle tube end of the needle group are reset, thereby driving the inner needle tube end of the needle group back into the cavity of its outer needle tube end, thereby meeting the in-situ safe sampling of the biopsy tissue so as not to hurt the patient and medical staff. When multiple samplings are required, the above sampling operations can be repeated; therefore, the present invention has the advantages of being able to effectively improve the puncture accuracy to improve the sampling efficiency and being able to improve the safety of biopsy sampling so as not to hurt the patient and medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the external structure of an in-situ sampling biopsy needle device according to the present invention;

[0030] Figure 2 It is a schematic diagram of the internal structure of an in-situ sampling biopsy needle device according to the present invention;

[0031] Figure 3 It is a schematic structural diagram of a reciprocating motion module of an in-situ sampling biopsy needle device according to the present invention before winding A and after winding B;

[0032] Figure 4 The structure of the firing module of the in-situ sampling biopsy needle device of the present invention is schematically shown. Figure 1 ;

[0033] Figure 5 The structure of the firing module of the in-situ sampling biopsy needle device of the present invention is schematically shown. Figure 2 ;

[0034] Figure 6 is a cross-sectional view of an in-situ sampling biopsy needle device according to the present invention;

[0035] Figure 7 It is a stereoscopic diagram of a reciprocating motion module of an in-situ sampling biopsy needle device according to the present invention;

[0036] Figure 8 It is a structural schematic diagram of a winding mechanism of an in-situ sampling biopsy needle device according to the present invention;

[0037] Fig. 9 The structure of the housing of the in-situ sampling biopsy needle device of the present invention is shown in FIG. Figure 1 ;

[0038] Fig.10 The structure of the housing of the in-situ sampling biopsy needle device of the present invention is shown in FIG. Figure 2 ;

[0039] Fig.11 It is a structural schematic diagram of a reciprocating motion base and an upper winding base of an in-situ sampling biopsy needle device according to the present invention;

[0040] Fig.12 It is a schematic diagram of the connection between the housing, the reciprocating motion module and the firing module of the in-situ sampling biopsy needle device of the present invention;

[0041] Fig.13 It is a structural schematic diagram of an inner needle rod base of an in-situ sampling biopsy needle device according to the present invention;

[0042] Fig.14 It is a structural schematic diagram of a needle group of an in-situ sampling biopsy needle device according to the present invention;

[0043] Fig.15It is a schematic diagram of the working principle structure of the in-situ sampling biopsy needle device of the present invention before winding A, after winding B, and the firing process C and D;

[0044] Fig.16 The three-dimensional structure diagram of the firing process of the in-situ sampling biopsy needle device of the present invention is Figure 1 ;

[0045] Fig.17 The three-dimensional structure diagram of the firing process of the in-situ sampling biopsy needle device of the present invention is Figure 2 ;

[0046] Fig.18 It is a self-locking schematic diagram of an in-situ sampling biopsy needle device according to the present invention;

[0047] Fig.19 The present invention is a schematic diagram of a self-locking structure of an in-situ sampling biopsy needle device. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific implementation method one:

[0050] See also Figures 1 to 19As shown, an in-situ sampling biopsy needle device comprises a shell 1; a reciprocating motion module 2 is arranged in the shell 1, and the side of the reciprocating motion module 2 away from the patient is the proximal end, and the other side is the distal end and a needle group 6 for puncture sampling is arranged at the end; a firing module 3 for implementing linkage limitation on the position of the corresponding parts of the reciprocating motion module 2 is arranged in the shell 1, and a winding mechanism 4 for driving the corresponding parts of the reciprocating motion module 2 to slide relative to the shell 1 is also arranged in the shell 1; and also includes an elastic component 5 arranged on the reciprocating motion module 2 for driving the corresponding parts of the reciprocating motion module 2 to quickly move to a predetermined position to realize reciprocating motion control. During use, before sampling, the inner needle tube end of the needle group 6 and the sampling chamber are located in the cavity of the outer needle tube end thereof, and the needle group 6, the reciprocating motion module 2, the firing module 3, the winding mechanism 4, and the elastic component 5 are all in the predetermined positions of the initial state. The operator operates the winding mechanism 4 to wind up the in-situ sampling biopsy needle device. At this time, the reciprocating motion module 2, the firing module 3 and the elastic component 5 are all moved to the predetermined positions of the ready-to-fire state, and the corresponding components of the elastic component 5 are stretched to generate elastic force; the operator then holds the housing 1 according to the puncture depth requirement to puncture the inner needle tube end of the needle group 6 together with the outer needle tube end into the target sampling position in the patient's body, thereby effectively improving the puncture accuracy to enhance the sampling efficiency, and then operates the firing module 3 to work, utilizing the coupling between the firing module 3 and the reciprocating motion module 2 The reciprocating motion module 2 moves from the predetermined position of the ready-to-fire state to the predetermined position of the initial state under the elastic force of the corresponding elastic component of the elastic component 5. During this process, the outer needle tube end of the needle group 6 is driven by the reciprocating motion module 2 to move toward the proximal side first, and at the same time, the corresponding component of the elastic component 5 stretches to generate elastic force. At this time, the sampling cavity of the inner needle tube end of the needle group 6 is exposed in the target sampling position, and the target sampled biopsy tissue enters the sampling cavity of the inner needle tube end of the needle group 6 due to its elasticity. Subsequently, the reciprocating motion module 2 drives the outer needle tube end of the needle group 6 to move toward the distal side under the elastic force of the corresponding component of the elastic component 5, thereby utilizing the reciprocating motion of the outer needle tube end of the needle group 6 to perform a cutting operation on the target sampled biopsy tissue so as to retain the biopsy tissue in the sampling cavity of the inner needle tube end of the needle group 6.

[0051] After the biopsy tissue sampling is completed, the handheld shell 1 withdraws the needle group 6 from the patient's body, and operates the corresponding components of the reciprocating motion module 2 to drive the inner needle tube end of the needle group 6 to move out of the outside of the outer needle tube end of the needle group 6 to expose the sampling cavity and biopsy tissue of the inner needle tube end. At this time, the corresponding components of the elastic component 5 are compressed to generate elastic force, and the medical staff can extract the biopsy tissue from the sampling cavity to achieve in-situ biopsy sampling operation, and then release the corresponding components of the reciprocating motion module 2. Under the elastic force of the corresponding components of the elastic component 5, the corresponding components of the reciprocating motion module 2 and the inner needle tube end of the needle group 6 are reset, thereby driving the inner needle tube end of the needle group 6 back into the cavity of its outer needle tube end, thereby satisfying the in-situ safe sampling of the biopsy tissue so as not to hurt the patient and medical staff. When multiple samplings are required, the above sampling operations can be repeated. Specific implementation method 2:

[0053] See also Figures 1 to 19As shown, the difference between this embodiment and embodiment 1 is that: the shell 1 includes a bottom shell 11, a first side shell 121, a second side shell 122, and a third side shell 123, and the combination order from the far end to the near end is the first side shell 121, the bottom shell 11, the second side shell 122, and the third side shell 123; the bottom shell 11 is provided with a first boss 111, a second boss 112, a winding window 113, a sliding groove 114 and a status indicator window 115, and it is shown that the firing module 3 cooperates with the bottom shell 11. The sliding cover 30 of the firing module 3 is arranged above the first boss 111, and the sliding cover 30 is directly connected to the first boss 111. The firing rod 31 is arranged above the first groove 1112 of the first boss 111, and the firing rod 31 can slide in both directions in the first groove 1112; the first fixing pin 341, the second fixing pin 342, the fourth fixing pin 344, and the fifth fixing pin 345 are respectively installed in the first fixing hole 1113, the second fixing hole 1114, the third fixing hole 1115, and the fourth fixing hole 1116, and the first buckle 321 and the second buckle 322 are respectively installed in the firing rod 31 through the first fixing pin 341 and the second fixing pin 342. At the top, the third elastic member 53 and the fourth elastic member 54 are respectively installed above the first boss 111 through the first fixing pin 341 and the second fixing pin 342. One end of the third elastic member 53 is connected to the inner wall of the bottom shell 11, and the other end is connected to the first clip 321. The third elastic member 53 is always in a deformation and energy storage state, so that the first clip 321 has a tendency to rotate clockwise around the first fixing pin 341, and the first trigger pin 331 limits the clockwise rotation of the first clip 321. In addition, after the first clip 321 rotates counterclockwise around the first fixing pin 341, the third elastic member 53 has the function of resetting the first clip 321. One end of the fourth elastic member 54 is connected to the inner wall of the bottom shell 11, and the other end is connected to the second buckle 322. The fourth elastic member 54 is always in a deformed energy storage state, so that the second buckle 322 has a tendency to rotate counterclockwise around the second fixing pin 342, and the third fixing pin 343 limits the counterclockwise rotation of the second buckle 322. In addition, after the second buckle 322 rotates clockwise around the second fixing pin 342, the fourth elastic member 54 has the function of resetting the second buckle 322; the first trigger pin 331, the second trigger pin 332, and the third fixing pin 343 are installed in the firing rod 31; the firing button 35 is connected to the firing rod 31, and operating the firing button 35 may drive the firing rod 31 to slide along the groove sliding groove. The first trigger pin 331 and the second trigger pin 332 can successively rotate the first buckle 321 and the second buckle 322 under the driving action of the firing rod 31.

[0054] In this embodiment, the reciprocating motion module 2 includes a sliding component 21 arranged in the shell 1, and a reciprocating motion base 22 with a first snap lock groove 222 is provided at the distal end of the sliding component 21, and a winding base 23 with a second snap lock groove 232 is provided between the proximal end of the sliding component 21 and the reciprocating motion base 22, and the bottom of the winding base 23 can extend downward to the top of the winding mechanism 4, and also includes an inner needle rod base 24 arranged on the winding base 23 and capable of sliding relative to the firing module 3, wherein the elastic component 5 is arranged on the sliding component 21 and the winding base 23, and the corresponding components of the needle group 6 are arranged on the inner needle rod base 24. The sliding component 21 includes a first stopper 211 and a second stopper 212 arranged on the distal end and proximal side walls of the shell 1, a sliding shaft 210 is arranged between the first stopper 211 and the second stopper 212, and one end of the sliding shaft 210 passes through the second stopper 212 and extends to the outside to be connected with an adjusting knob 214, and a third stopper 213 is detachably arranged on the sliding shaft 210, wherein the reciprocating motion base 22 is slidably arranged on the sliding shaft 210 and is located between the first stopper 211 and the third stopper 213, and the winding base 23 is slidably arranged on the sliding shaft 210 and is located between the second stopper 212 and the third stopper 213. The winding base 23 includes a winding base sliding block 231 slidably arranged on the sliding shaft 210 and having a second snap lock groove 232 which is snap-fitted with the second snap 322 to achieve position locking. A winding pin 233 extending downward to the top of the winding mechanism 4 is provided at the bottom of the winding base sliding block 231. A positioning pin 234 connected and cooperated with the inner needle rod base 24 is also provided on the winding base sliding block 231 at the top of one end of the second snap lock groove 232. It also includes an elastic member second fixing pin 235 arranged on the top of one end of the winding base sliding block 231 away from the positioning pin 234 for connecting and cooperating with the elastic component 5. The inner needle rod base 24 includes an inner needle rod base slider 241 which is arranged above the upper string base sliding block 231 and cooperates with the positioning pin 234 to achieve position limitation, and a first base 2411 and a second base 2412 which are located above the firing module 3 and in sliding contact with the top of the firing module 3 are respectively provided at both ends of one side of the inner needle rod base slider 241, and an axis 244 connected to the elastic component 5 is provided between the first base 2411 and the second base 2412, and a fixed key pin 243 connected to the corresponding part of the needle group 6 is provided at the top of the inner needle rod base slider 241, and a push sliding key 242 is provided on the other side wall of the inner needle rod base slider 241 away from the axis 244, and the push sliding key 242 extends out of the shell 1 and can slide along the corresponding groove of the shell 1.During use, the corresponding components of the elastic component 5 are arranged between the first base 2411 and the limit block 301, and have a reset function. The push slide key 242 can slide on the sliding groove 114 of the bottom shell 11 of the shell 1. In addition, operating the push slide key 242 can also drive the inner needle rod base 24 to move back and forth above the sliding cover 30 of the shell 1.

[0055] In this embodiment, the firing module 3 includes a sliding cover 30 arranged on the inner wall of the corresponding side of the shell 1, and the top of the sliding cover 30 is in sliding contact with the first base 2411 and the second base 2412, wherein the inner needle rod base slider 241 is position-limited by the first base 2411, the second base 2412 and a limit block 301 arranged on the top of the sliding cover 30, and a firing rod 31 is provided below the sliding cover 30 to cooperate with a predetermined groove of the shell 1 to achieve two-way reciprocating sliding adjustment, and also includes a trigger pin assembly 33, a fixing pin assembly 34 and a buckle assembly 32 arranged on the top of the firing rod 31, and the buckle assembly 32 and the fixing pin assembly 34 are connected to the corresponding components of the elastic assembly 5, and a firing button 35 for pressing and driving the firing rod 31 to slide along the shell 1 is provided at the lower ends of both sides of the firing rod 31. The buckle assembly 32 includes a first buckle 321 and a second buckle 322 movably arranged at both ends of the top of the firing rod 31 through the fixing pin assembly 34, wherein the corresponding ends of the first buckle 321 and the second buckle 322 are connected to the corresponding components of the elastic assembly 5 and the position is limited by the trigger pin assembly 33, and the first buckle 321 and the second buckle 322 are respectively engaged with the first buckle locking groove 222 and the second buckle locking groove 232 to achieve position locking. The fixing pin assembly 34 includes a first fixing pin 341 and a second fixing pin 342 for movably mounting the corresponding ends of the first buckle 321 and the second buckle 322 on the corresponding end of the firing rod 31, and a third fixing pin 343 is provided on the firing rod 31 near the end of the second fixing pin 342 and located on one side of the second buckle 322, and also includes a fourth fixing pin 344 and a fifth fixing pin 345 provided on the inner wall of the corresponding side of the housing 1 and used to limit the elastic member of the elastic assembly 5 connected to the corresponding ends of the first buckle 321 and the second buckle 322 at a predetermined position. The trigger pin assembly 33 includes a first trigger pin 331 provided on the firing rod 31 near the end of the first fixing pin 341 and located on one side of the first buckle 321, and also includes a second trigger pin 332 provided on the firing rod 31 near the top of one end of the fifth fixing pin 345 and used to limit the position of the second buckle 322.

[0056] In this embodiment, the upper string mechanism 4 includes an upper string body 40 arranged on the shell 1 and located below the upper string base sliding block 231. A groove 41 is provided on the top of one side of the upper string body 40 and is connected and cooperated with the upper string pin 233 to achieve one-way limit control. A pin hole 42 is also provided on the outer side wall of one end of the upper string body 40 close to the groove 41 and is sleeved and cooperated with the corresponding component of the elastic component 5. During use, the upper string body 40 of the upper string mechanism 4 is arranged inside the bottom shell 11 of the shell body 1, and can slide freely in both the distal and proximal directions. The ejector hole 42 of the upper string mechanism 4 is on the same axis as the ejector 1225 of the second side shell 122 of the shell body 1 and the seventh elastic member 57. One side of the seventh elastic member 57 is connected to the second side shell 122, and the other side of the seventh elastic member 57 enters the ejector hole 42 of the upper string mechanism 4 and is connected to the bottom surface of the ejector hole 42. Under the connection action of the seventh elastic member 57, the upper string body 40 is located on the side of the bottom shell 11 of the shell body 1 close to the distal end and is connected to the first side shell 121; the top groove 41 of the upper string mechanism 4 is connected to the upper string pin 233 of the upper string base 23. When the upper string body 40 slides from the distal end to the proximal end inside the bottom shell 11 of the shell body 1, the top groove 41 has a one-way limiting effect on the upper string pin 233, driving the upper string base 23 to slide toward the proximal end.

[0057] In this embodiment, the elastic component 5 includes a first elastic member 51, a second elastic member 52, a third elastic member 53, and a fourth elastic member 54; the two ends of the first elastic member 51 are respectively connected to the reciprocating motion base 22 and the upper string base sliding block 231, the two ends of the second elastic member 52 are respectively connected to the upper string base sliding block 231 and the second stopper 212, one end of the third elastic member 53 is limited on the inner wall of the corresponding side of the shell 1 through the fourth fixing pin 344, and the other end of the third elastic member 53 is connected to the corresponding end of the first buckle 321, one end of the fourth elastic member 54 is limited on the inner wall of the corresponding side of the shell 1 through the fifth fixing pin 345, and the other end of the fourth elastic member 54 is connected to the corresponding end of the second buckle 322. The elastic component 5 also includes an eighth elastic member 58, one end of the eighth elastic member 58 is connected to the end of the shaft 244 close to the first base 2411, and the other end of the eighth elastic member 58 is connected to the limit block 301. During use, the eighth elastic member 58 of the elastic component 5 is arranged between the first base 2411 and the limit block 301, and has a reset function. The push slide key 242 can slide on the sliding groove 114 of the bottom shell 11 of the shell 1. In addition, operating the push slide key 242 can also drive the inner needle rod base 24 to move back and forth above the sliding cover 30 of the shell 1.

[0058] In this embodiment, the needle assembly 6 includes an outer needle tube assembly 62 disposed on the top of the reciprocating motion base 22, and an inner needle rod assembly 61 disposed on the top of the inner needle rod base slider 241, and the puncture end of the inner needle rod assembly 61 is sleeved and matched with the outer needle tube assembly 62. The outer needle tube assembly 62 includes an outer needle tube seat 621 disposed on the top of the reciprocating motion base 22, and the outer needle tube seat 621 has a through cavity for the puncture end of the inner needle rod assembly 61 to pass through, and an outer needle tube 622 for sleeved and matched with the puncture end of the inner needle rod assembly 61 is provided on the through cavity of the outer needle tube seat 621 at one end away from the inner needle rod assembly 61. The inner needle rod assembly 61 includes an inner needle rod seat 611 which is arranged on the top of the inner needle rod base slider 241 and connected to the fixed key pin 243, and the position of the inner needle rod seat 611 corresponds to the position of the outer needle tube seat 621. An inner needle rod 612 with a sampling chamber 6121 is provided on one end of the inner needle rod seat 611 close to the outer needle tube seat 621, which can extend into the outer needle tube 622 to perform sampling operations during operation.

[0059] In this embodiment, the sampling process of the target tissue is as follows:

[0060] Before winding and in the stage of waiting to fire, the inner needle rod 612 of the inner needle rod assembly 61 of the needle group 6 and the sampling chamber 6121 are located in the inner cavity of the outer needle tube 622. After winding and puncturing the inner needle rod assembly 61 together with the outer needle tube assembly 62 into the target sampling position in the patient's body, the firing button 35 is operated to make the firing module 3 and the reciprocating motion module 22 interlock. The movement trajectory of the reciprocating motion base 22 in the whole linkage process is: the reciprocating motion base 22 moves from the initial state position to the firing position of the reciprocating motion base 22, and then the reciprocating motion base 22 moves to the firing position of the reciprocating motion base 22. 22 moves from the ready-to-fire position to the initial state position of the reciprocating motion base 22. During this process, the reciprocating motion base 22 drives the outer needle tube assembly 62 to move, and the outer needle tube 622 moves from the initial state position to the proximal side to the ready-to-fire position. At this time, the sampling chamber 6121 of the inner needle rod 612 is exposed to the outside of the outer needle tube 622, and the target tissue enters the sampling chamber 6121 due to its elastic properties. In addition, the outer needle tube 622 returns from the ready-to-fire position of the outer needle tube 622 to the initial state position of the outer needle tube 622 under the driving action of the reciprocating motion module 22. During this process, the outer needle tube 622 will cut the target tissue to store it in the sampling chamber 6121; after the sampling is completed, the needle group 6 is withdrawn from the patient's body, and the push sliding key 242 of the inner needle rod base 24 is operated to move along the sliding groove 114 of the bottom shell 11 of the shell 1 toward the distal side. When the inner needle rod base 24 moves toward the distal side, the inner needle rod 612 is also moved toward the distal side under the drive of the inner needle rod base 24, and the normal distance between the first base 2411 and the limit block 301 will be shortened, and the eighth elastic member 58 will be compressed. When the inner needle rod base 24 moves from its initial state position to its ready-to-fire position, the sampling chamber 6211 of the inner needle rod 612 is exposed. At this time, the medical staff extracts the target tissue in the sampling chamber 6211 and releases the push slide key 242. The inner needle rod base 24 is reset to its initial state position from its ready-to-fire position under the elastic action of the eighth elastic member 58. The sampling chamber 6211 of the inner needle rod 612 returns to the inner cavity of the outer needle tube 622, and the sampling is completed. If multiple samplings are required, the operation can be repeated.

[0061] In this embodiment, the winding process is as follows:

[0062] Before winding, the reciprocating motion base 22, the winding base 23, and the winding mechanism 4 are in their initial state positions, the proximal side of the reciprocating motion base 22 is connected to the winding base 23, and the distal side is connected to the first stopper 211, both of which are located on the distal side of the sliding shaft 210; at this time, the first buckle 321 in the firing module 3 is connected to the first buckle locking groove 222 of the reciprocating motion base 22, so that the reciprocating motion base 22 is in a locked state, restricting the sliding of the reciprocating motion base 22; the winding window 113 of the bottom shell 11 is pressed or pushed to slide the winding body 40 of the winding mechanism 4 from its initial state position to its ready-to-fire position, and the winding body 40 is aligned with the winding pin 233 through the top groove 41 The limiting action drives the upper string base 23 to slide toward the proximal end along the sliding shaft 210, and moves from the initial state position of the upper string base 23 to the ready-to-fire position of the upper string base 23. When the upper string base 23 moves to its ready-to-fire position, the second buckle 322 cooperates with the second buckle locking groove 232 of the upper string base 23. Subsequently, the second buckle locking groove 232 limits the movement of the upper string base 23, and the upper string base 23 is in a locked state. At this time, the first elastic member 51 and the second elastic member 52 are in an energy storage state, releasing the upper string body 40. Under the elastic force of the seventh elastic member 57, the upper string body 40 is reset from its ready-to-fire position to its initial state position. At this time, the in-situ sampling biopsy needle is in a ready-to-fire state.

[0063] In this embodiment, the firing control principle is described as follows:

[0064] After the winding operation is completed, pressing the corresponding firing button 35 will drive the firing rod 31 to slide toward the proximal end along the first groove 1112 of the bottom shell 11, and the first trigger pin 331 and the second trigger pin 332 are fixed in the firing rod 31. When the firing rod 31 slides, the first trigger pin 331 and the second trigger pin 332 will also move with it. Pressing the firing button 35 will drive the firing rod 31 to move from the initial state position of the firing rod 31 to the ready-to-fire position of the firing rod 31 or the predetermined position of the firing rod 31. In the process of the firing rod 31 moving from its initial state position to its ready-to-fire position, the first trigger pin 331 and the first buckle 321 are linked together. When the first trigger pin 331 moves, it will come into tangential contact with the inclined surface of the first buckle 321 and push the first buckle 321 to rotate counterclockwise around the first fixing pin 341. When the firing rod 31 reaches the firing position, the first buckle 321 reaches the maximum rotation stroke, and the first buckle 321 is separated from the connection relationship with the first buckle locking groove 222, thereby releasing the locking state of the reciprocating motion base 22. During this process, the second trigger pin 332 and the second buckle 322 are not linked in any way. Therefore, the winding base 23 is still in the locked state and is fixed at the firing position of the winding base 23 and remains motionless. Subsequently, the first elastic member 51 releases its elastic potential energy. The reciprocating motion base 22 is driven by the first fixing pin 224 of the elastic member to slide at high speed toward the proximal side along the sliding shaft 210, and then reaches the ready-to-fire position of the reciprocating motion base 22 under the limiting action of the third stopper 213; in the process of the firing rod 31 moving from its ready-to-fire position to its predetermined position, the first buckle 321 is still in the maximum rotation stroke position, and the first trigger pin 331 mainly plays a limiting role on the first buckle 321 at this time, while the second trigger pin 332 is linked with the second buckle 322, and in the process of the second trigger pin 332 moving, it will contact tangentially with the inclined surface of the second buckle 322, and push the second buckle 322 to rotate around the second The fixing pin 342 rotates clockwise, and when the firing rod 31 reaches its third position from its ready-to-fire position, the second clip 322 reaches its maximum rotational stroke, and the second clip 322 disengages from the connection relationship with the second clip locking groove 232, releasing the locking state of the winding base 23. Subsequently, the second elastic member 52 releases the elastic potential energy, causing the winding base 23 to slide at high speed along the sliding shaft 210 toward the distal side, moving from the ready-to-fire position of the winding base 23 to the initial state position of the winding base 23, and pushing the reciprocating motion base 22 to move toward the distal end, from the ready-to-fire position of the reciprocating motion base 22 to the initial state position of the reciprocating motion base 22.When the firing button 35 is released, the elastic action of the third elastic member 53 and the fourth elastic member 54 respectively causes the first clip 321 and the second clip 322 to rotate and reset to their initial positions before firing. At the same time, the first clip 321 and the second clip 322 respectively drive the first trigger pin 331 and the second trigger pin 332 to move toward the distal side, and the firing rod 31 is reset from its third position to its initial state position. When the first clip 321 returns to the initial position, it connects with the first clip lock groove 222 of the reciprocating motion base 22, so that the reciprocating motion base 22 is locked again.

[0065] In this embodiment, the adjustment of the firing stroke is described as follows:

[0066] The firing stroke adjustment of the present invention can be performed before winding or after the winding operation is completed or before firing:

[0067] The adjustment of the firing stroke actually adjusts the sliding stroke of the reciprocating motion base 22. The sliding stroke range of the reciprocating motion base 22 is between the first stopper 211 and the third stopper 213. The actual length of the reciprocating motion base 22 sliding along the sliding axis 210 during each tissue sampling process is equivalent to the firing stroke of the in-situ sampling biopsy at that time, and is also equivalent to the unidirectional movement length of the outer needle tube 622 at that time. The actual length of the reciprocating motion base 22 along the sliding axis 210 is the normal distance from the side plane 2110 on the proximal side of the reciprocating motion base 22 to the first step 2131 or the second step 2132 of the third stopper 213.

[0068] When the adjustment knob 214 is in its position A, the third stopper 213 and the reciprocating motion base 22 have a relative position relationship; when the firing operation is performed, when the first buckle 321 is disengaged from the connection relationship with the first buckle locking groove 222, the locking state of the reciprocating motion base 22 is released, and the reciprocating motion base 22 slides at high speed along the sliding shaft 210 toward the proximal side under the action of the first elastic member 51, and when the side plane 2110 on the proximal side of the reciprocating motion base 22 connects with the first step 2131 of the third stopper 213, the reciprocating motion base 22 stops sliding. In this process, the maximum displacement of the reciprocating motion base 22 along the sliding shaft 210 toward the proximal side is the firing stroke A.

[0069] When the adjustment knob 214 is in its position B, the third stopper 213 and the reciprocating motion base 22 have a relative position relationship; when the firing operation is performed, when the first buckle 321 is disengaged from the connection relationship with the first buckle locking groove 222, the locking state of the reciprocating motion base 22 is released, and the reciprocating motion base 22 slides at high speed along the sliding shaft 210 toward the proximal side under the action of the first elastic member 51, and when the side plane 2110 on the proximal side of the reciprocating motion base 22 connects with the second step 2132 of the third stopper 213, the reciprocating motion base 22 stops sliding. In this process, the maximum displacement of the reciprocating motion base 22 along the sliding shaft 210 toward the proximal side is the firing stroke B.

[0070] After the winding operation is completed, the adjustment operation demonstration of the firing stroke is performed before firing, and the adjustment knob 214 is adjusted to a predetermined displacement, and the third stopper 213 rotates accordingly, and the present invention is adjusted from the firing stroke A to the firing stroke B; wherein the elastic positioning pin 1224 prevents the adjustment knob 214 from being misoperated and improves the operating feel of the adjustment knob 214;

[0071] The firing stroke adjustment operation process of this embodiment before winding is basically the same as the above. It is only necessary to adjust the adjustment knob 214 according to the needs, and the third stopper 213 will also rotate accordingly, from the initial state position to the ready-to-fire position. During the entire adjustment process, the adjustment knob 214 and the third stopper 213 will not be linked with the reciprocating motion module 3 and the firing module 4. Therefore, the operator can adjust the firing stroke at will in the two stages before or after winding and before firing according to actual needs to meet the sampling requirements.

[0072] In addition to this embodiment, one or more steps may be provided on the stopper 3, and the firing stroke may be changed by adjusting the knob 214 so as to have multiple firing strokes.

[0073] In this embodiment, the working principle of safety self-locking is described as follows:

[0074] The second side shell 122 includes a shell original 1220, a pin 1225, and an elastic positioning pin 1224; wherein the shell original 1220 is provided with a sliding cavity 1221, a first through hole 1222, and a second through hole 1223; the safety lock push block 71 includes a push rod 711, a limit platform 712, and a blind hole 713, the push rod passes through the second through hole 1223 of the shell original 1220, and can move in the second through hole 1223 of the shell original 1220; the safety lock switch 72 is provided with a blind hole 721, a stopper 722, a groove channel 723, and a convex groove 724; one end of the sixth elastic member 56 is connected to the surface of one side of the proximal end of the third side shell 123, The other end is fixed inside the blind hole 713 of the safety lock push block 71. Due to the elastic effect of the sixth elastic member 56, the safety lock push block 71 tends to move toward the distal end; one end of the seventh elastic member 57 is connected to the upper top surface of the sliding cavity of the shell original 1220, and the other end is fixed inside the blind hole 721 of the safety lock switch 72. Due to the elastic effect of the seventh elastic member 57, the safety lock push block 71 tends to move toward the distal end; before winding, the surface of the proximal end of the limit platform 712 is connected to the sliding cavity surface 1221. At this time, the limit platform 712 plays a limiting role on the safety lock switch 72, and the safety lock push block 71 and the safety lock switch 72 are both in the In the initial state position, the proximal side of the firing push rod 31 passes through the first through hole 1222 of the shell original 1220, and can slide toward the proximal side through the groove channel 723 of the safety lock switch 72. Before winding, the firing button 35 is in an operable state; during the winding operation, when the winding body 40 of the winding mechanism 4 slides proximally from its initial state position to its ready-to-fire position, the winding body 40 will be connected with the push rod 711 and push the safety lock push block 71 to move toward the proximal direction. When the winding body 40 and the safety lock push block 71 reach their respective ready-to-fire positions, the limit platform 712 of the safety lock push block 71 releases the safety lock The switch 72 plays a limiting role. Subsequently, the safety lock switch 72 slides downward along the surface of the sliding cavity 1221 under the elastic action of the seventh elastic member 57, and moves from the initial state position above the safety lock switch 72 to the firing position below. The lower bottom surface of the safety lock switch 72 is connected to the upper top surface of the push rod 711. At this time, the safety lock switch 72 will play a limiting role on the safety lock push block 71, limiting the safety lock push block 71 from moving toward the distal end under the action of the sixth elastic member 56. In addition, the block 722 will play a limiting role on the firing push rod 31, limiting the firing push rod 31 from moving toward the proximal side, and the firing button 35 is in an inoperable state and in a safe state.

[0075] After the winding body 40 is reset, the convex groove 724 of the safety lock switch 72 is pushed upward, and the lower bottom surface of the safety lock switch 72 is separated from the upper top surface of the push rod 71. When the safety lock switch 72 moves from the lower firing position to the upper initial state position, the safety lock switch 72 releases the limiting effect on the safety lock push block 71 and the firing rod 31, and the safety lock push block 71 moves to the far end under the elastic action of the sixth elastic member 56. When the safety lock push block 71 is reset to its initial state position, it limits the safety lock switch 72. At this time, The firing push rod 31 can slide toward the proximal side through the groove channel 723 of the safety lock switch 72, the firing button 35 is in an operable state, and the in-situ sampling biopsy needle device is in a ready-to-fire state; each time the in-situ sampling biopsy needle device completes the winding operation, the safety self-locking function will be activated, so that the firing button 35 is in an inoperable state, and the in-situ sampling biopsy needle device is in a safe state; the safety lock switch 72 is turned to unlock the safety state, the firing button 35 is in an operable state, and the in-situ sampling biopsy needle device is in a ready-to-fire state; and this cycle is repeated.

[0076] In summary, the present invention adopts the above-mentioned structure, which has the advantages of being able to effectively improve the puncture accuracy to enhance the sampling efficiency, and being able to improve the safety of biopsy sampling to avoid harming patients and medical staff.

[0077] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. An in-situ sampling biopsy needle device, comprising a housing (1); characterized in that: A reciprocating motion module (2) is arranged in the shell (1), and the side of the reciprocating motion module (2) away from the patient is the proximal end, and the other side is the distal end, and a needle group (6) for puncturing and sampling is arranged at the end; a firing module (3) for implementing linkage limitation on the position of the corresponding parts of the reciprocating motion module (2) is arranged in the shell (1), and a winding mechanism (4) for driving the corresponding parts of the reciprocating motion module (2) to slide relative to the shell (1) is also arranged in the shell (1); and also includes an elastic component (5) arranged on the reciprocating motion module (2) for driving the corresponding parts of the reciprocating motion module (2) to move quickly to a predetermined position to realize reciprocating motion control.

2. The in situ sampling biopsy needle device according to claim 1, characterized in that: The reciprocating motion module (2) includes a sliding component (21) arranged in the shell (1), and a reciprocating motion base (22) with a first snap lock groove (222) is provided at the distal end of the sliding component (21), and a winding base (23) with a second snap lock groove (232) is provided between the proximal end of the sliding component (21) and the reciprocating motion base (22), and the bottom of the winding base (23) can extend downward to the top of the winding mechanism (4), and also includes an inner needle rod base (24) arranged on the winding base (23) and capable of sliding relative to the firing module (3), wherein the elastic component (5) is arranged on the sliding component (21) and the winding base (23), and the corresponding components of the needle group (6) are arranged on the inner needle rod base (24).

3. The in situ sampling biopsy needle device according to claim 2, characterized in that: The sliding component (21) comprises a first stopper (211) and a second stopper (212) arranged on both side walls of the distal end and the proximal end of the shell (1); a sliding shaft (210) is arranged between the first stopper (211) and the second stopper (212); one end of the sliding shaft (210) passes through the second stopper (212) and extends outward to be connected with an adjusting knob (214); a third stopper (213) is detachably arranged on the sliding shaft (210); wherein the reciprocating motion base (22) is slidably arranged on the sliding shaft (210) and is located between the first stopper (211) and the third stopper (213); and the winding base (23) is slidably arranged on the sliding shaft (210) and is located between the second stopper (212) and the third stopper (213).

4. The in situ sampling biopsy needle device according to claim 3, characterized in that: The winding base (23) includes a winding base sliding block (231) which is slidably arranged on the sliding shaft (210) and has a second snap lock groove (232) which is snap-fitted with the second snap (322) to achieve position locking. A winding pin (233) extending downward to the top of the winding mechanism (4) is provided at the bottom of the winding base sliding block (231). A positioning pin (234) which is connected and cooperated with the inner needle rod base (24) is also provided at the top of one end of the second snap lock groove (232) on the winding base sliding block (231). The winding base also includes an elastic member second fixing pin (235) which is arranged on the top of one end of the winding base sliding block (231) away from the positioning pin (234) and is used to connect and cooperate with the elastic component (5).

5. The in situ sampling biopsy needle device according to claim 4, characterized in that: The inner needle rod base (24) includes an inner needle rod base slider (241) which is arranged above the upper string base sliding block (231) and cooperates with the positioning pin (234) to achieve position limitation. A first base (2411) and a second base (2412) are respectively provided at both ends of one side of the inner needle rod base slider (241) and are located above the firing module (3) and are in sliding contact with the top of the firing module (3). An axis (244) connected to the elastic component (5) is provided between the first base (2411) and the second base (2412). A second fixed key pin (243) connected to the corresponding part of the needle group (6) is provided at the top of the inner needle rod base slider (241). A push sliding key (242) is also provided on the other side wall of the inner needle rod base slider (241) away from the axis (244), and the push sliding key (242) extends out of the outside of the shell (1) and can slide along the corresponding groove of the shell (1).

6. The in situ sampling biopsy needle device according to claim 5, characterized in that: The firing module (3) comprises a sliding cover (30) arranged on the inner wall of the corresponding side of the shell (1), and the top of the sliding cover (30) is in sliding contact with the first base (2411) and the second base (2412), wherein the inner needle bar base slider (241) is positioned by the first base (2411), the second base (2412) and a limit block (301) arranged on the top of the sliding cover (30), and a stop block (301) arranged at the bottom of the sliding cover (30) is provided with a stop block (301) in contact with the shell. The firing rod (31) cooperates with the predetermined groove of the firing rod (1) to realize bidirectional reciprocating sliding adjustment, and also includes a trigger pin assembly (33) and a fixing pin assembly (34) and a buckle assembly (32) arranged at the top of the firing rod (31), and the buckle assembly (32) and the fixing pin assembly (34) are connected to the corresponding components of the elastic assembly (5), and a firing button (35) is provided at the lower end of both sides of the firing rod (31) for pressing and driving the firing rod (31) to slide along the shell (1).

7. The in situ sampling biopsy needle device according to claim 6, characterized in that: The buckle assembly (32) comprises a first buckle (321) and a second buckle (322) movably arranged at two ends of the top of the firing rod (31) through the fixing pin assembly (34), wherein the corresponding ends of the first buckle (321) and the second buckle (322) are connected to the corresponding components of the elastic assembly (5) and the position is limited by the trigger pin assembly (33), and the first buckle (321) and the second buckle (322) are respectively engaged with the first buckle locking groove (222) and the second buckle locking groove (232) to achieve position locking.

8. The in situ sampling biopsy needle device according to claim 7, characterized in that: The fixing pin assembly (34) comprises a first fixing pin (341) and a second fixing pin (342) for movably mounting the corresponding ends of the first buckle (321) and the second buckle (322) on the corresponding end of the firing rod (31); a third fixing pin (343) is provided on the firing rod (31) at one end close to the second fixing pin (342) and is located on one side of the second buckle (322); and a fourth fixing pin (344) and a fifth fixing pin (345) are provided on the inner wall of the corresponding side of the shell (1) and are used to limit the elastic component of the elastic assembly (5) connected to the corresponding ends of the first buckle (321) and the second buckle (322) to a predetermined position.

9. The in situ sampling biopsy needle device according to claim 8, characterized in that: The trigger pin assembly (33) comprises a first trigger pin (331) arranged on one end of the firing rod (31) close to the first fixing pin (341) and located on one side of the first buckle (321), and also comprises a second trigger pin (332) arranged on the top of one end of the firing rod (31) close to the fifth fixing pin (345) for limiting the position of the second buckle (322).

10. The in situ sampling biopsy needle device according to claim 9, characterized in that: The string-up mechanism (4) comprises a string-up body (40) arranged on the housing (1) below the string-up base sliding block (231); a groove (41) is provided on the top of one side of the string-up body (40) and is connected and matched with the string-up pin (233) to achieve one-way limit control; and a pin hole (42) is provided on the outer side wall of one end of the string-up body (40) close to the groove (41) and is sleeved and matched with a corresponding component of the elastic component (5).

11. The in situ sampling biopsy needle device according to claim 10, characterized in that: The elastic component (5) comprises a first elastic member (51), a second elastic member (52), a third elastic member (53) and a fourth elastic member (54); two ends of the first elastic member (51) are respectively connected to the reciprocating motion base (22) and the upper string base sliding block (231); two ends of the second elastic member (52) are respectively connected to the upper string base sliding block (231) and the second stopper (212); one end of the third elastic member (53) is limited on the inner wall of the corresponding side of the shell (1) through the fourth fixing pin (344) and the other end of the third elastic member (53) is connected to the corresponding end of the first buckle (321); one end of the fourth elastic member (54) is limited on the inner wall of the corresponding side of the shell (1) through the fifth fixing pin (345) and the other end of the fourth elastic member (54) is connected to the corresponding end of the second buckle (322).

12. The in situ sampling biopsy needle device according to claim 11, characterized in that: The elastic component (5) further comprises an eighth elastic member (58), one end of the eighth elastic member (58) being connected to an end of the shaft (244) close to the first base (2411), and the other end of the eighth elastic member (58) being connected to the limit block (301).

13. The in situ sampling biopsy needle device according to claim 10, characterized in that: The needle assembly (6) comprises an outer needle tube assembly (62) arranged on the top of the reciprocating motion base (22), and an inner needle rod assembly (61) arranged on the top of the inner needle rod base slider (241), and the puncture end of the inner needle rod assembly (61) is sleeved and matched with the outer needle tube assembly (62).

14. The in situ sampling biopsy needle device according to claim 13, characterized in that: The outer needle tube assembly (62) includes an outer needle tube seat (621) arranged on the top of the reciprocating motion base (22), and the outer needle tube seat (621) has a through cavity for the puncture end of the inner needle rod assembly (61) to pass through, and an outer needle tube (622) for being sleeved and matched with the puncture end of the inner needle rod assembly (61) is provided on the through cavity of the outer needle tube seat (621) at one end away from the inner needle rod assembly (61).

15. The in situ sampling biopsy needle device according to claim 14, characterized in that: The inner needle rod assembly (61) includes an inner needle rod seat (611) which is arranged on the top of the inner needle rod base slider (241) and connected to the fixed key pin 2 (243), and the position of the inner needle rod seat (611) corresponds to the position of the outer needle tube seat (621). An inner needle rod (612) with a sampling chamber (6121) is provided at one end of the inner needle rod seat (611) close to the outer needle tube seat (621) and can be extended into the outer needle tube (622) to perform sampling operations during operation.

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