In-situ sampling biopsy needle device

Abstract

The utility model 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 utility model has the advantages that the puncture precision can be effectively improved so as to improve the sampling efficiency, and the biopsy sampling safety can be improved so as not to hurt patients and medical personnel easily.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field more specifically, especially, particularly relates to a in situ sampling biopsy needle device. BACKGROUND

[0002] At present, the soft tissue puncture sampling is usually carried out on patients by adopting the side groove cutting coaxial biopsy needle in clinic. The existing coaxial biopsy needle is mainly composed of a firing device and a biopsy needle group, and the biopsy needle group is mainly composed of an outer needle tube and an inner needle rod.

[0003] In the process of implementing the puncture biopsy sampling, the existing coaxial biopsy needle is used to pre-judge the puncture target position under the ultrasound or CT image, and then the coaxial biopsy needle is operated to make it in the standby firing state, and then the needle is punctured to approach the target tissue and the relative position between the needle tip of the coaxial biopsy needle and the target tissue is judged based on the image guidance and development effect, and then the firing trajectory and sampling position of the coaxial biopsy needle are estimated, and then the coaxial biopsy needle is operated to fire, and the inner needle rod is driven by the corresponding elastic element of the firing device to puncture a certain distance to the target sampling area, and then the outer needle tube is driven by the corresponding elastic element of the firing device to cut the target sampling area, so as to store the sampling tissue in the inner needle rod. Thus, the cutting and separation operation of the coaxial biopsy needle on the human tissue is implemented to realize the biopsy sampling analysis and diagnosis. The existing coaxial biopsy needle can meet certain use requirements, but there are still the following problems in the process of puncture biopsy sampling:

[0004] 1. The estimated trajectory of the coaxial biopsy needle by medical staff is prone to deviation, which affects the puncture precision and the biopsy sampling efficiency;

[0005] 2. There is a large invalid puncture distance in the process of puncture sampling, which is easy to hurt the dangerous parts of the patient and cause medical accidents;

[0006] 3. In the process of use, misoperation is easy to occur, which causes the coaxial biopsy needle to be misfired and hurt the medical staff, and it is difficult to meet the actual application requirements.

[0007] How to solve the above problems has become a technical problem to be solved. Utility model content

[0008] The technical problem to be solved by the utility model is to provide an in situ sampling biopsy needle device which can effectively improve the puncture precision to improve the sampling efficiency, and can improve the biopsy sampling safety to not easily hurt the patient and the medical staff.

[0009] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0010] The utility model provides a kind of in situ sampling biopsy needle device, including shell;It is provided with reciprocating movement module in the shell and the reciprocating movement module is proximal end away from patient side, its other side is distal end and is provided with a needle group for puncture sampling at this end;It is provided with a firing module for the position of the corresponding components of the reciprocating movement module is implemented linkage definition in the shell, it is also provided with a upper string mechanism for sliding the corresponding components of the reciprocating movement module relative to the shell in the shell;It also includes the elastic component for the corresponding components of the reciprocating movement module is quickly moved to predetermined position to realize reciprocating movement control being provided on the reciprocating movement module.

[0011] Preferably, the reciprocating movement module includes a sliding component provided in the shell, a reciprocating movement base with a first buckle lock groove is provided at the distal end of the sliding component, a upper string base with a second buckle lock groove is further provided between the proximal end of the sliding component and the reciprocating movement base, and the bottom of the upper string base can extend downward to the top of the upper string mechanism, and the inner needle rod base capable of sliding relative to the firing module is provided on the upper string base, wherein the elastic component is provided on the sliding component and the upper string base, and the corresponding components of the needle group are provided on the inner needle rod base.

[0012] Preferably, the sliding component includes a first stopper and a second stopper provided on the two side walls of the distal end and the proximal end of the shell, a sliding shaft is provided between the first stopper and the second stopper, one end of the sliding shaft extends out of the second stopper and is connected with an adjusting knob, and a third stopper is detachably provided on the sliding shaft, wherein the reciprocating movement base is slidably provided on the sliding shaft and located between the first stopper and the third stopper, and the upper string base is slidably provided on the sliding shaft and located between the second stopper and the third stopper.

[0013] Preferably, the upper string base includes an upper string base sliding block slidably provided on the sliding shaft and having a second buckle lock groove, the position of the upper string base sliding block is locked by the second buckle lock groove, a upper string pin extending downward to the top of the upper string mechanism is provided at the bottom of the upper string base sliding block, a positioning pin connected with the inner needle rod base is provided at the top of one end of the upper string base sliding block located at one end of the second buckle lock groove, and a elastic member second fixing pin for connecting with the elastic component is provided at the top of the other end of the upper string base sliding block away from the positioning pin.

[0014] Preferably, the inner needle rod base comprises an inner needle rod base sliding block provided above the upper chord base sliding block and realizing position limitation in cooperation with the positioning pin, a first bottom table and a second bottom table are respectively provided at both ends of one side of the inner needle rod base sliding block and are located above the firing module and in sliding contact with the top of the firing module, a shaft connected with the elastic assembly is provided between the first bottom table and the second bottom table, a second fixed key pin II connected with corresponding components of the needle group is provided on the top of the inner needle rod base sliding block, and a pushing sliding key is further provided on the other side wall of the inner needle rod base sliding block away from the shaft and can slide along the corresponding channel of the shell and extend out of the shell.

[0015] Preferably, the firing module comprises a sliding cover provided on the inner wall of a corresponding side of the shell and in sliding contact with the first bottom table and the second bottom table at the top of the sliding cover, wherein the inner needle rod base sliding block realizes position limitation in cooperation with a limiting block provided at the top of the sliding cover through the first bottom table and the second bottom table, a firing rod for bidirectional back-and-forth sliding adjustment in cooperation with a predetermined groove of the shell is provided below the sliding cover, a trigger pin assembly is provided at the top of the firing rod, and a fixed pin assembly and a buckle assembly are connected with 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 end of each side of the firing rod.

[0016] Preferably, the buckle assembly comprises a first buckle and a second buckle movably provided at both ends of the top of the firing rod through the fixed pin assembly, wherein the corresponding ends of the first buckle and the second buckle are connected with corresponding components of the elastic assembly and realize position limitation through the trigger pin assembly, and the first buckle and the second buckle are respectively in clamping cooperation with the first buckle locking groove and the second buckle locking groove to realize position locking.

[0017] Preferably, the fixed pin assembly comprises a first fixed pin and a second fixed pin for movably mounting the corresponding ends of the first buckle and the second buckle on a corresponding end of the firing rod, a third fixed pin is further provided on one end of the firing rod close to the second fixed pin and located on one side of the second buckle, and a fourth fixed pin and a fifth fixed pin are further provided on a corresponding inner wall of a side of the shell for limiting elastic components of the elastic assembly connected with the corresponding ends of the first buckle and the second buckle at a predetermined position.

[0018] Preferably, the trigger pin assembly comprises a first trigger pin provided on one end of the firing rod close to the first fixed pin and located on one side of the first buckle, and a second trigger pin provided at the top of one end of the firing rod close to the fifth fixed pin for implementing position limitation on the second buckle.

[0019] Preferably, the upper string mechanism comprises an upper string body arranged on the shell below the upper string base sliding block, a groove for one-way limiting control is arranged on one side top of the upper string body and connected with the upper string pin, and a thimble hole for sleeving the corresponding member of the elastic assembly is arranged on the outer side wall of one end of the upper string body close to the groove.

[0020] Preferably, the elastic assembly comprises 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 connected with the reciprocating motion base and the upper string base sliding block respectively, two ends of the second elastic member are connected with the upper string base sliding block and the second stopper respectively, one end of the third elastic member is limited on the corresponding inner wall of one side of the shell through the fourth fixed pin and the other end of the third elastic member is connected with the corresponding end of the first buckle, one end of the fourth elastic member is limited on the corresponding inner wall of one side of the shell through the fifth fixed pin and the other end of the fourth elastic member is connected with the corresponding end of the second buckle.

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

[0022] Preferably, the needle group comprises 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 sliding block and sleeved with the puncture end of the outer needle tube assembly.

[0023] Preferably, the outer needle tube assembly comprises an outer needle tube seat arranged on the top of the reciprocating motion base and provided with a through cavity for the puncture end of the inner needle rod assembly to pass through, and an outer needle tube for sleeving the puncture end of the inner needle rod assembly is arranged on the 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 comprises an inner needle rod seat arranged on the top of the inner needle rod base sliding block and connected with the second fixed key pin, the position of the inner needle rod seat corresponds to the position of the outer needle tube seat, and an inner needle rod with a sampling chamber capable of sampling inside the outer needle tube during work is arranged on one end of the inner needle rod seat close to the outer needle tube seat.

[0025] Compared with the prior art, the utility model has the beneficial effects as follows:

[0026] In the utility model, the inner needle tube end of needle group and sampling bin are located in the cavity of outer needle tube end before sampling, needle group, reciprocating movement module, firing module, upper string mechanism, elastic assembly are all in the initial state of predetermined position, the operator operates the upper string mechanism to implement the upper string operation on the in-situ sampling biopsy needle device, at this time, reciprocating movement module, firing module, elastic assembly are all moved to the predetermined position of standby firing state, the corresponding component of elastic assembly stretches to produce the elastic force, the operator again according to the puncture depth demand, handheld shell punctures the inner needle tube end of needle group together with outer needle tube end and stretches into the target sampling position in patient's body, thereby can effectively improve the puncture precision to improve the sampling efficiency, then operate the firing module to work, utilize the linkage action of firing module and reciprocating movement module to make reciprocating movement module move from the predetermined position of standby firing state to the predetermined position of initial state under the elastic force driving of the corresponding elastic component of elastic assembly, in this process, the outer needle tube end of needle group is moved to the proximal side by reciprocating movement module, at the same time, the corresponding component of elastic assembly stretches to produce the elastic force, at this time, the sampling cavity of inner needle tube end is exposed in the target sampling position, the biopsy tissue of target sampling enters the sampling cavity of inner needle tube end because of the elasticity, then reciprocating movement module drives the outer needle tube end of needle group to move to the distal side under the elastic force driving of the corresponding component of elastic assembly, thereby utilizes the reciprocating movement of outer needle tube end to implement the cutting operation on the biopsy tissue of target sampling to keep the biopsy tissue in the sampling cavity of inner needle tube end.

[0027] After the biopsy tissue sampling is completed, handheld shell withdraws needle group from patient's body, the corresponding component of reciprocating movement module drives the inner needle tube end of needle group to move and stretch out the outside of outer needle tube end to expose the sampling cavity and biopsy tissue of the inner needle tube end, at this time, the corresponding component of elastic assembly is compressed to produce the elastic force, the medical staff extracts the biopsy tissue from the sampling cavity to realize the in-situ biopsy sampling operation, then release the corresponding component of reciprocating movement module, make the corresponding component of reciprocating movement module and the inner needle tube end of needle group reset under the elastic force action of the corresponding component of elastic assembly, thereby drive the inner needle tube end of needle group to return to the cavity of outer needle tube end, further satisfy the in-situ safe sampling of biopsy tissue to not easily hurt patient and medical staff, when needing to sample for many times, the above sampling operation can be repeatedly implemented, therefore, the utility model has the advantages of effectively improving the puncture precision to improve the sampling efficiency, can improve the biopsy sampling safety to not easily hurt patient and medical staff. BRIEF DESCRIPTION OF DRAWINGS

[0028] The utility model will be further described below in connection with the drawings and examples.

[0029] Figure 1 It is the external structure schematic diagram of in-situ sampling biopsy needle device of the utility model.

[0030] Figure 2 It is the internal structure schematic view of the in-situ sampling biopsy needle device of the utility model;

[0031] Figure 3 It is the structure schematic view of the upper string front A and the upper string back B of the to-and-fro movement module of the in-situ sampling biopsy needle device of the utility model;

[0032] Figure 4 It is the structure schematic of the firing module of the in-situ sampling biopsy needle device of the utility model Figure 1 ;

[0033] Figure 5 It is the structure schematic of the firing module of the in-situ sampling biopsy needle device of the utility model Figure 2 ;

[0034] Figure 6 It is the sectional view of the in-situ sampling biopsy needle device of the utility model;

[0035] Figure 7 It is the perspective view of the to-and-fro movement module of the in-situ sampling biopsy needle device of the utility model;

[0036] Figure 8 It is the structure schematic view of the upper string mechanism of the in-situ sampling biopsy needle device of the utility model;

[0037] Figure 9 It is the structure schematic of the shell of the in-situ sampling biopsy needle device of the utility model Figure 1 ;

[0038] Figure 10 It is the structure schematic of the shell of the in-situ sampling biopsy needle device of the utility model Figure 2 ;

[0039] Figure 11 It is the structure schematic view of the to-and-fro movement base and the upper string base of the in-situ sampling biopsy needle device of the utility model;

[0040] Figure 12 It is the connection schematic of the shell, to-and-fro movement module and firing module of the in-situ sampling biopsy needle device of the utility model;

[0041] Figure 13 It is the structure schematic view of the inner needle rod base of the in-situ sampling biopsy needle device of the utility model;

[0042] Figure 14 It is the structure schematic view of the needle group of the in-situ sampling biopsy needle device of the utility model;

[0043] Figure 15 is the working principle structure schematic diagram of the upper string front A, the upper string back B, the firing process C and D of the in-situ sampling biopsy needle device of the utility model;

[0044] Figure 16 is the three-dimensional structure schematic diagram of the firing process of the in-situ sampling biopsy needle device of the utility model Figure 1 ;

[0045] Figure 17 is the three-dimensional structure schematic diagram of the firing process of the in-situ sampling biopsy needle device of the utility model Figure 2 ;

[0046] Figure 18 is the self-locking schematic diagram of the in-situ sampling biopsy needle device of the utility model;

[0047] Figure 19 is the self-locking structure schematic diagram of the in-situ sampling biopsy needle device of the utility model. DETAILED DESCRIPTION

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

[0050] Reference Figures 1 to 19As shown, a biopsy needle device for in-situ sampling includes a housing 1; a reciprocating module 2 is arranged in the housing 1 and has a proximal end away from a patient and a distal end, and a needle set 6 for sampling is arranged at the distal end; a firing module 3 is arranged in the housing 1 and is used to define the linkage of the position of the corresponding components of the reciprocating module 2; an upper string mechanism 4 is also arranged in the housing 1 and is used to drive the corresponding components of the reciprocating module 2 to slide relative to the housing 1; and an elastic assembly 5 is arranged on the reciprocating module 2 and is used to drive the corresponding components of the reciprocating module 2 to quickly move to a predetermined position to achieve reciprocating motion control. In use, before sampling, the inner needle tube end of the needle set 6 and the sampling chamber at the outer needle tube end are located in the cavity, the needle set 6, the reciprocating module 2, the firing module 3, the upper string mechanism 4, and the elastic assembly 5 are all at the predetermined positions in the initial state, and the operator operates the upper string mechanism 4 to operate the in-situ sampling biopsy needle device, at this time, the reciprocating module 2, the firing module 3, and the elastic assembly 5 are all moved to the predetermined positions in the standby firing state, and the corresponding components of the elastic assembly 5 are stretched to generate elastic force; the operator holds the housing 1 to puncture the inner needle tube end of the needle set 6 together with the outer needle tube end into the target sampling position in the patient according to the puncture depth requirement, thereby effectively improving the puncture accuracy to improve the sampling efficiency, and then operating the firing module 3 to drive the reciprocating module 2 from the predetermined position in the standby firing state to the predetermined position in the initial state by the linkage of the firing module 3 and the reciprocating module 2 and the elastic force of the corresponding components of the elastic assembly 5, in the process, the outer needle tube end of the needle set 6 is moved to the proximal side by the reciprocating module 2, and the corresponding components of the elastic assembly 5 are stretched to generate elastic force, at this time, the sampling cavity of the inner needle tube end of the needle set 6 is exposed in the target sampling position, the biopsy tissue of the target sampling enters the sampling cavity of the inner needle tube end of the needle set 6 due to the elasticity, and then the outer needle tube end of the needle set 6 is moved to the distal side by the reciprocating module 2 driven by the elastic force of the corresponding components of the elastic assembly 5, thereby cutting the biopsy tissue of the target sampling by the reciprocating motion of the outer needle tube end of the needle set 6 to leave the biopsy tissue in the sampling cavity of the inner needle tube end of the needle set 6.

[0051] After the biopsy tissue sampling is completed, the hand-held housing 1 withdraws the needle set 6 from the patient's body, the corresponding member of the reciprocating motion module 2 is operated to drive the inner needle tube end of the needle set 6 to move out of the outer needle tube end of the needle set 6 to expose the sampling cavity and the biopsy tissue of the inner needle tube end, at this time, the corresponding member of the elastic assembly 5 is compressed to generate elastic force, the medical staff extracts the biopsy tissue from the sampling cavity to achieve the in-situ biopsy sampling operation, the corresponding member of the reciprocating motion module 2 is released again, the corresponding member of the reciprocating motion module 2 and the inner needle tube end of the needle set 6 are reset under the elastic force of the corresponding member of the elastic assembly 5, so as to drive the inner needle tube end of the needle set 6 back into the cavity of the outer needle tube end, thereby satisfying the in-situ safe sampling of the biopsy tissue to avoid hurting the patient and the medical staff, when multiple sampling is required, the above sampling operation can be repeatedly implemented. Specific embodiment two:

[0053] Reference Figures 1 to 19The difference between the present embodiment and the first embodiment is that the shell 1 comprises a bottom shell 11, a first side shell 121, a second side shell 122 and a third side shell 123, and the combination sequence from the distal end to the proximal 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, an upper chord window 113, a sliding groove 114 and a state indicating window 115, and the firing module 3 is matched with the bottom shell 11. The sliding cover 30 of the firing module 3 is arranged above the first boss 111, the sliding cover 30 is directly connected with the first boss 111, the firing rod 31 is arranged above the first recess 1112 of the first boss 111, and the firing rod 31 can slide bidirectionally in the first recess 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 fixed hole 1113, the second fixed hole 1114, the third fixed hole 1115 and the fourth fixed hole 1116, the first buckle 321 and the second buckle 322 are respectively installed above the firing rod 31 through the first fixing pin 341 and the second fixing pin 342, 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 with the inner wall of the bottom shell 11, the other end of the third elastic member 53 is connected with the first buckle 321, the third elastic member 53 is always in a deformed energy storage state, so that the first buckle 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 buckle 321, in addition, the third elastic member 53 has a function of resetting the first buckle 321 after the first buckle 321 rotates counterclockwise around the first fixing pin 341. One end of the fourth elastic member 54 is connected with the inner wall of the bottom shell 11, the other end of the fourth elastic member 54 is connected with 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, the fourth elastic member 54 has a function of resetting the second buckle 322 after the second buckle 322 rotates clockwise around the second fixing pin 342; 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 with the firing rod 31, and operating the firing button 35 can drive the firing rod 31 to slide along the groove sliding groove, and the first trigger pin 331 and the second trigger pin 332 can make the first buckle 321 and the second buckle 322 rotate in turn under the driving action of the firing rod 31.

[0054] In the embodiment, the reciprocating movement module 2 comprises a sliding component 21 arranged in the housing 1, a reciprocating base 22 with a first buckle locking groove 222 arranged at the distal end of the sliding component 21, an upper chord base 23 with a second buckle locking groove 232 arranged between the proximal end of the sliding component 21 and the reciprocating base 22, and the bottom of the upper chord base 23 can extend downward to the top of the upper chord mechanism 4, and further comprises an inner needle rod base 24 arranged on the upper chord base 23 and capable of sliding relative to the firing module 3, wherein the elastic assembly 5 is arranged on the sliding component 21 and the upper chord base 23, and the corresponding components of the needle group 6 are arranged on the inner needle rod base 24. The sliding component 21 comprises a first stop block 211 and a second stop block 212 arranged on the two side walls of the distal end and the proximal end of the housing 1, a sliding shaft 210 arranged between the first stop block 211 and the second stop block 212, one end of the sliding shaft 210 extending out of the second stop block 212 and connected with an adjusting knob 214, and a third stop block 213 detachably arranged on the sliding shaft 210, wherein the reciprocating base 22 is slidably arranged on the sliding shaft 210 and located between the first stop block 211 and the third stop block 213, and the upper chord base 23 is slidably arranged on the sliding shaft 210 and located between the second stop block 212 and the third stop block 213. The upper chord base 23 comprises an upper chord base sliding block 231 slidably arranged on the sliding shaft 210, the second buckle locking groove 232 of the upper chord base sliding block 231 is in locking cooperation with the second buckle 322 to realize position locking, an upper chord pin 233 extending downward to the top of the upper chord mechanism 4 is arranged at the bottom of the upper chord base sliding block 231, a positioning pin 234 connected and cooperated with the inner needle rod base 24 is arranged at the top of one end of the upper chord base sliding block 231 located at one end of the second buckle locking groove 232, and an elastic member second fixing pin 235 for connecting and cooperating with the elastic assembly 5 is arranged at the top of the other end of the upper chord base sliding block 231 away from the positioning pin 234. The inner needle rod base 24 comprises an inner needle rod base sliding block 241 arranged above the upper chord base sliding block 231 and cooperated with the positioning pin 234 to realize position limitation, a first bottom table 2411 and a second bottom table 2412 located above the firing module 3 and in sliding contact with the top of the firing module 3 are respectively arranged at the two ends of one side of the inner needle rod base sliding block 241, a shaft 244 connected with the elastic assembly 5 is arranged between the first bottom table 2411 and the second bottom table 2412, a fixed key pin two 243 connected with the corresponding components of the needle group 6 is arranged at the top of the inner needle rod base sliding block 241, and a pushing sliding key 242 is arranged on the other side wall of the inner needle rod base sliding block 241 away from the shaft 244, and the pushing sliding key 242 extending out of the housing 1 can slide along the corresponding channel of the housing 1.In use, the corresponding member of the elastic assembly 5 is arranged between the first base 2411 and the limiting block 301, having a reset function, and the push sliding key 242 can slide on the sliding groove 114 of the bottom shell 11 of the shell 1, and in addition, operating the push sliding key 242 can also drive the inner needle rod base 24 to reciprocate above the sliding cover 30 of the shell 1.

[0055] In the embodiment, the firing module 3 includes a sliding cover 30 arranged on the inner wall of a 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. The inner needle rod base sliding block 241 is positionally limited by the first base 2411, the second base 2412, and a limiting block 301 arranged on the top of the sliding cover 30. A firing rod 31 is arranged below the sliding cover 30 and cooperates with a predetermined groove of the shell 1 to achieve bidirectional reciprocating sliding adjustment. The firing module 3 further includes a trigger pin assembly 33, a fixed pin assembly 34, and a buckle assembly 32 arranged on the top of the firing rod 31, and the buckle assembly 32 and the fixed pin assembly 34 are connected with corresponding members of the elastic assembly 5. A firing button 35 is arranged at the lower end of each side of the firing rod 31 for pressing and driving the firing rod 31 to slide along the shell 1. The buckle assembly 32 includes a first buckle 321 and a second buckle 322 movably arranged at the two ends of the top of the firing rod 31 through the fixed pin assembly 34. The corresponding ends of the first buckle 321 and the second buckle 322 are connected with corresponding members of the elastic assembly 5 and are positionally limited by the trigger pin assembly 33. The first buckle 321 and the second buckle 322 are respectively buckled and cooperated with the first buckle locking groove 222 and the second buckle locking groove 232 to achieve position locking. The fixed pin assembly 34 includes a first fixed pin 341 and a second fixed pin 342 for movably mounting the corresponding ends of the first buckle 321 and the second buckle 322 on a corresponding end of the firing rod 31. A third fixed pin 343 is arranged on one end of the firing rod 31 close to the second fixed pin 342 and located on one side of the second buckle 322. The shell 1 further includes a fourth fixed pin 344 and a fifth fixed pin 345 arranged on the inner wall of a corresponding side of the shell 1 for limiting the elastic members of the elastic assembly 5 connected with the corresponding ends of the first buckle 321 and the second buckle 322 to a predetermined position. The trigger pin assembly 33 includes a first trigger pin 331 arranged on one end of the firing rod 31 close to the first fixed pin 341 and located on one side of the first buckle 321. The trigger pin assembly 33 further includes a second trigger pin 332 arranged on the top of one end of the firing rod 31 close to the fifth fixed pin 345 for positionally limiting the second buckle 322.

[0056] In the embodiment, the upper string mechanism 4 comprises an upper string body 40 arranged on the shell 1 below the upper string base sliding block 231. A groove 41 is formed on one side top of the upper string body 40 and connected with the upper string pin 233 to realize one-way limiting control. A thimble hole 42 is also formed on the outer wall of one end of the upper string body 40 near the groove 41 and matched with the corresponding member of the elastic assembly 5. In use, the upper string body 40 of the upper string mechanism 4 is arranged inside the bottom shell 11 of the shell 1 and can slide freely in the distal and proximal directions. The thimble hole 42 of the upper string mechanism 4 is in the same axis as the thimble 1225 of the second side shell 122 and the seventh elastic member 57. One side of the seventh elastic member 57 is connected with the second side shell 122 and the other side enters the thimble hole 42 of the upper string mechanism 4 and is connected with the bottom surface of the thimble hole 42. Under the connection of the seventh elastic member 57, the upper string body 40 is arranged inside the bottom shell 11 of the shell 1 near the distal side and connected with the first side shell 121. The top groove 41 of the upper string mechanism 4 is connected with 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 1, the upper string pin 233 can be driven to slide to the proximal end by the one-way limiting action of the top groove 41.

[0057] In the embodiment, the elastic assembly 5 comprises 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 with the back-and-forth movement base 22 and the upper string base sliding block 231. The two ends of the second elastic member 52 are respectively connected with the upper string base sliding block 231 and the second stop block 212. One end of the third elastic member 53 is limited on the corresponding inner wall of the shell 1 by the fourth fixed pin 344 and the other end is connected with the corresponding end of the first buckle 321. One end of the fourth elastic member 54 is limited on the corresponding inner wall of the shell 1 by the fifth fixed pin 345 and the other end is connected with the corresponding end of the second buckle 322. The elastic assembly 5 further comprises an eighth elastic member 58. One end of the eighth elastic member 58 is connected with the end of the shaft 244 near the first bottom platform 2411 and the other end is connected with the limiting block 301. In use, the eighth elastic member 58 of the elastic assembly 5 is arranged between the first bottom platform 2411 and the limiting block 301 and has a reset function. The sliding key 242 can slide on the sliding groove 114 of the bottom shell 11 of the shell 1. In addition, the operation of the sliding 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 the present embodiment, the needle set 6 comprises an outer needle tube assembly 62 arranged on the top of the reciprocating 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 with the outer needle tube assembly 62. The outer needle tube assembly 62 comprises an outer needle tube seat 621 arranged on the top of the reciprocating base 22, and the outer needle tube seat 621 is provided with a through cavity for the puncture end of the inner needle rod assembly 61 to pass through, and an outer needle tube 622 for sleeving with the puncture end of the inner needle rod assembly 61 is arranged on the end of the through cavity of the outer needle tube seat 621 away from the inner needle rod assembly 61. The inner needle rod assembly 61 comprises an inner needle rod seat 611 arranged on the top of the inner needle rod base slider 241 and connected with 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, and an inner needle rod 612 with a sampling chamber 6121 capable of extending into the inner part of the outer needle tube 622 to perform sampling operation in working is arranged on the end of the inner needle rod seat 611 close to the outer needle tube seat 621.

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

[0060] Before cocking and the stage of being ready to fire, the inner needle rod 612 of the inner needle rod assembly 61 of the needle set 6 and the sampling chamber 6121 are located in the inner cavity of the outer needle tube 622. After cocking and the inner needle rod assembly 61 together with the outer needle tube assembly 62 are punctured to stretch 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 be linked. The movement track of the reciprocating motion base 22 in the whole linkage process is that the reciprocating motion base 22 moves from the initial state position to the ready-to-fire position of the reciprocating motion base 22, and then the reciprocating motion base 22 moves from the ready-to-fire position to the initial state position of the reciprocating motion base 22. In this process, the reciprocating motion base 22 drives the outer needle tube assembly 62 to move. 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 outside the outer needle tube 622. The target tissue enters the sampling chamber 6121 due to the elastic characteristics, and 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. In this process, the outer needle tube 622 will cut the target tissue to save in the sampling chamber 6121. After sampling is completed, the needle set 6 is withdrawn from the patient's body. The pushing sliding key 242 of the inner needle rod base 24 is operated to move to the distal side along the sliding groove 114 of the bottom shell 11 of the shell 1. When the inner needle rod base 24 moves to the distal side, the inner needle rod 612 also moves to the distal side under the driving of the inner needle rod base 24. The normal distance between the first bottom platform 2411 and the limiting block 301 will be shortened, and the eighth elastic member 58 will be compressed. When the inner needle rod base 24 moves from the initial state position to the 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 pushing sliding key 242. The inner needle rod base 24 is reset from the ready-to-fire position to the initial state 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. Sampling is completed. If multiple sampling is required, repeated operation can be performed.

[0061] In the embodiment, the cocking operation process is as follows:

[0062] Before cocking, each part of reciprocating base 22, cocking base 23 and cocking mechanism 4 is in its initial state position, the proximal side of reciprocating base 22 is connected with cocking base 23, and the distal side is connected with first stop block 211, both of which are located at the distal side of sliding shaft 210; at this time, first buckle 321 in firing module 3 is connected with first buckle lock slot 222 of reciprocating base 22, so that reciprocating base 22 is in a locked state, limiting the sliding of reciprocating base 22; by pressing or pushing cocking body 40 of cocking mechanism 4 through cocking window 113 of bottom shell 11, cocking body 40 is slid from its initial state position to its cocking position, cocking body 40 drives cocking base 23 to slide along sliding shaft 210 to the proximal end by the limiting action of top end groove 41 on cocking pin 233, and cocking base 23 moves from its initial state position to its cocking position; when cocking base 23 moves to its cocking position, second buckle 322 is connected with second buckle lock slot 232 of cocking base 23, and then second buckle lock slot 232 limits the movement of cocking base 23, and cocking base 23 is in a locked state; at this time, first elastic member 51 and second elastic member 52 are in an energy storage state, cocking body 40 is released, and under the action of the seventh elastic member 57, cocking body 40 moves from its cocking position to its initial state position; at this time, the in-situ sampling biopsy needle is in a cocking state.

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

[0064] After the cocking operation is completed, pressing the corresponding firing button 35 drives the firing rod 31 to slide along the first groove 1112 of the bottom shell 11 towards the proximal end. The first trigger pin 331 and the second trigger pin 332 are fixed in the firing rod 31, and when the firing rod 31 slides, the first trigger pin 331 and the second trigger pin 332 also move. Pressing the firing button 35 drives the firing rod 31 to move from the initial state position of the firing rod 31 to the cocking position of the firing rod 31 or the predetermined position of the firing rod 31. During the movement of the firing rod 31 from the initial state position to the cocking position, the first trigger pin 331 is linked with the first buckle 321. During the movement of the first trigger pin 331, it is tangent to the inclined surface of the first buckle 321 and pushes the first buckle 321 to rotate counterclockwise around the first fixed pin 341. When the firing rod 31 reaches the cocking position, the first buckle 321 reaches the maximum rotation stroke, and the first buckle 321 is separated from the first buckle locking groove 222, releasing the locking state of the reciprocating base 22. In this process, the second trigger pin 332 does not link with the second buckle 322, so the cocking base 23 is still in the locked state, and the cocking base 23 fixed in the cocking position remains stationary. Subsequently, the first elastic member 51 releases the elastic potential energy, drives the elastic member first fixed pin 224, and makes the reciprocating base 22 slide at high speed along the sliding shaft 210 towards the proximal end, and then reaches the cocking position of the reciprocating base 22 under the limiting action of the third stopper 213. During the movement of the firing rod 31 from the cocking position to the 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, while the second trigger pin 332 links with the second buckle 322. During the movement of the second trigger pin 332, it is tangent to the inclined surface of the second buckle 322 and pushes the second buckle 322 to rotate clockwise around the second fixed pin 342. When the firing rod 31 reaches the third position from the cocking position, the second buckle 322 reaches the maximum rotation stroke, and the second buckle 322 is separated from the second buckle locking groove 232, releasing the locking state of the cocking base 23. Subsequently, the second elastic member 52 releases the elastic potential energy, makes the cocking base 23 slide at high speed along the sliding shaft 210 towards the distal end, moves the cocking base 23 from the cocking position to the initial state position, and pushes the reciprocating base 22 to move towards the distal end, from the cocking position to the initial state position of the reciprocating base 22.When the firing button 35 is released, the elastic force of the third elastic member 53 and the fourth elastic member 54 respectively makes the first clasp 321 and the second clasp 322 rotate and reset to the initial position before firing, at the same time, the first clasp 321 and the second clasp 322 respectively drive the first trigger pin 331 and the second trigger pin 332 to move to the distal side, the firing rod 31 resets from the third position to the initial state position, when the first clasp 321 returns to the initial position, the first clasp 321 is connected with the first clasp locking groove 222 of the reciprocating base 22, so that the reciprocating base 22 is in the locking state again.

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

[0066] The adjustment of the firing stroke of the utility model can be carried out before stringing or after the stringing operation is completed or before firing:

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

[0068] When the adjustment knob 214 is in the position A, the relative position relationship between the third stop block 213 and the reciprocating base 22 is as follows: when the first clasp 321 is separated from the first clasp locking groove 222, the locking state of the reciprocating base 22 is released, the reciprocating base 22 slides to the proximal side along the sliding shaft 210 under the action of the first elastic member 51, when the side plane 2110 of the proximal side of the reciprocating base 22 is connected with the first step 2131 of the third stop block 213, the reciprocating base 22 stops sliding, and the maximum displacement of the reciprocating base 22 to the proximal side along the sliding shaft 210 in the process is the firing stroke A.

[0069] When the adjusting knob 214 is in its position B, the relative position of the third stop 213 and the reciprocating motion base 22 is as follows: When the firing operation is performed, when the first latch 321 disengages from the first latch locking groove 222, the locking state of the reciprocating motion base 22 is released. Under the action of the first elastic element 51, the reciprocating motion base 22 slides at high speed along the sliding shaft 210 to the proximal side. When the side plane 2110 of the reciprocating motion base 22 on the proximal side connects with the second step 2132 of the third stop 213, the reciprocating motion base 22 stops sliding. During this process, the maximum displacement of the reciprocating motion base 22 along the sliding shaft 210 to the proximal side is the firing stroke B.

[0070] After the cocking operation is completed, the firing stroke adjustment operation is demonstrated before firing. The adjustment knob 214 is adjusted to a predetermined displacement, and the third stop 213 rotates accordingly. This utility model is adjusted from firing stroke A to firing stroke B. Among them, the elastic positioning pin 1224 plays the role of preventing the adjustment knob 214 from being operated accidentally and improving the operating feel of the adjustment knob 214.

[0071] In this embodiment, the firing stroke adjustment process before cocking is basically the same as described above. Only the adjustment knob 214 needs to be adjusted according to the requirements. The third stop 213 will also rotate accordingly, from its initial position to its firing position. During the entire adjustment process, the adjustment knob 214 and the third stop 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 cocking, according to actual needs, to meet the sampling requirements.

[0072] In addition to this embodiment, one or more steps can be provided on the stop block 3, and the firing stroke can be changed by adjusting the knob 214 to give it multiple firing strokes.

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

[0074] The second side shell 122 includes a shell component 1220, a ejector pin 1225, and an elastic positioning pin 1224. The shell component 1220 has 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 limiting platform 712, and a blind hole 713. The push rod passes through the second through hole 1223 of the shell component 1220 and can move within the second through hole 1223. The safety lock switch 72 has a blind hole 721, a stop block 722, a groove channel 723, and a protrusion 724. One end of the sixth elastic element 56 is in contact with the proximal surface 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 action of the sixth elastic element 56, the safety lock push block 71 tends to move to the distal end. One end of the seventh elastic element 57 is in contact with the upper top surface of the sliding cavity of the housing component 1220, and the other end is fixed inside the blind hole 721 of the safety lock switch 72. Due to the elastic action of the seventh elastic element 57, the safety lock push block 71 tends to move to the distal end. Before winding, the surface of the limiting platform 712 near the end is in contact with the surface of the sliding cavity 1221. At this time, the limiting platform 712 plays a limiting role on the safety lock switch 72, and both the safety lock push block 71 and the safety lock switch 72 are in the desired position. In the initial state position, the firing push rod 31 passes through the first through hole 1222 of the housing component 1220 on one side and can slide towards the proximal end through the groove channel 723 of the safety lock switch 72. Before cocking, the firing button 35 is in an operable state. During the cocking operation, when the cocking body 40 of the cocking mechanism 4 slides from its initial state position to its proximal end to its ready-to-fire position, the cocking body 40 will engage with the push rod 711 and push the safety lock push block 71 to move towards the proximal end. When the cocking body 40 and the safety lock push block 71 reach their respective ready-to-fire positions, the limiting platform 712 of the safety lock push block 71 releases the safety lock. Switch 72 acts as a limit switch. Subsequently, under the elastic action of the seventh elastic element 57, safety lock switch 72 slides downward along the surface of sliding cavity 1221, moving from the initial position above safety lock switch 72 to the lower ready-to-fire position. The bottom surface of safety lock switch 72 is in contact with the top surface of push rod 711. At this time, safety lock switch 72 will limit safety lock push block 71, restricting safety lock push block 71 from moving to the far end under the action of sixth elastic element 56. In addition, stop block 722 will limit firing push rod 31, restricting firing push rod 31 from moving to the proximal side. Firing button 35 is in an inoperable state and is in a safe state.

[0075] After the upper winding body 40 is reset, the protrusion 724 of the safety lock switch 72 is pushed upward, separating the lower bottom surface of the safety lock switch 72 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 position, the safety lock switch 72 releases its limiting effect on the safety lock push block 71 and the firing rod 31. Under the elastic action of the sixth elastic element 56, the safety lock push block 71 moves to the distal end. When the safety lock push block 71 resets to its original initial position, it limits the safety lock switch 72. At this time, The firing lever 31 can slide to the proximal side through the groove channel 723 of the safety lock switch 72, putting the firing button 35 in an operable state and the in-situ sampling biopsy needle device in a ready-to-fire state. Each time the in-situ sampling biopsy needle device completes the winding operation, the safety self-locking function is activated, making the firing button 35 in an inoperable state and the in-situ sampling biopsy needle device in a safe state. Flipping the safety lock switch 72 unlocks the safe state, putting the firing button 35 in an operable state and the in-situ sampling biopsy needle device in a ready-to-fire state; this cycle repeats.

[0076] In summary, the present invention, with the above-described structure, has the advantages of effectively improving puncture accuracy to enhance sampling efficiency and improving the safety of biopsy sampling to reduce the risk of injury to patients and medical staff.

[0077] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. An in-situ sampling biopsy needle device comprising a housing (1); characterized in that: The shell (1) is provided with a reciprocating movement module (2) and the far side from the patient is the proximal end, the other side is the distal end and a needle group (6) for puncture sampling is arranged at the end; the shell (1) is provided with a firing module (3) for limiting the position linkage of the corresponding components of the reciprocating movement module (2), and the shell (1) is also provided with a cocking mechanism (4) for driving the corresponding components of the reciprocating movement module (2) to slide relative to the shell (1); and the reciprocating movement module (2) is provided with an elastic component (5) for driving the corresponding components of the reciprocating movement module (2) to quickly move to the predetermined position to realize reciprocating movement control.

2. The in-situ sampling and biopsy needle device of claim 1, wherein: The reciprocating movement module (2) comprises a sliding component (21) arranged in the shell (1), a reciprocating movement base (22) with a first buckle locking groove (222) is arranged at the distal end of the sliding component (21), a cocking base (23) with a second buckle locking groove (232) is arranged between the proximal end of the sliding component (21) and the reciprocating movement base (22), the bottom of the cocking base (23) can extend downward to the top of the cocking mechanism (4), and an inner needle rod base (24) capable of sliding relative to the firing module (3) is arranged on the cocking base (23), wherein the elastic component (5) is arranged on the sliding component (21) and the cocking 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 and biopsy needle device of claim 2, wherein: The sliding component (21) comprises a first stop block (211) and a second stop block (212) arranged on the two side walls of the distal end and the proximal end of the shell (1), a sliding shaft (210) is arranged between the first stop block (211) and the second stop block (212), one end of the sliding shaft (210) penetrates through the second stop block (212) and extends outside to be connected with an adjusting knob (214), and a third stop block (213) is detachably arranged on the sliding shaft (210), wherein the reciprocating movement base (22) is slidably arranged on the sliding shaft (210) and located between the first stop block (211) and the third stop block (213), and the cocking base (23) is slidably arranged on the sliding shaft (210) and located between the second stop block (212) and the third stop block (213).

4. The in-situ sampling and biopsy needle device of claim 3, wherein: The upper chord base (23) comprises an upper chord base sliding block (231) slidingly arranged on the sliding shaft (210) and having a second buckle locking groove (232) for locking position with the second buckle (322), an upper chord pin (233) extending downward from the bottom of the upper chord base sliding block (231) to the top of the upper chord mechanism (4), a positioning pin (234) arranged on the top of one end of the second buckle locking groove (232) of the upper chord base sliding block (231) for connecting with the inner needle rod base (24), and a second elastic member fixing pin (235) arranged on the top of the other end of the upper chord base sliding block (231) away from the positioning pin (234) for connecting with the elastic assembly (5).

5. The in-situ sampling and biopsy needle device of claim 4, wherein: The inner needle rod base (24) comprises an inner needle rod base sliding block (241) arranged above the upper chord base sliding block (231) and cooperating with the positioning pin (234) to limit position, a first bottom platform (2411) and a second bottom platform (2412) arranged on both ends of one side of the inner needle rod base sliding block (241) and above the firing module (3) and in sliding contact with the top of the firing module (3), a shaft (244) arranged between the first bottom platform (2411) and the second bottom platform (2412) and connected with the elastic assembly (5), a fixed key pin two (243) arranged on the top of the inner needle rod base sliding block (241) and connected with corresponding components of the needle group (6), and a push sliding key (242) arranged on the other side wall of the inner needle rod base sliding block (241) away from the shaft (244) and extending out of the shell (1) and capable of sliding along the corresponding groove of the shell (1).

6. The in-situ sampling and biopsy needle device of claim 5, wherein: The firing module (3) comprises a sliding cover (30) arranged on the inner wall of a corresponding side of the shell (1) and in sliding contact with the first bottom platform (2411) and the second bottom platform (2412), wherein the inner needle rod base sliding block (241) is limited in position by cooperating with a limiting block (301) arranged on the top of the sliding cover (30) through the first bottom platform (2411) and the second bottom platform (2412), a firing rod (31) arranged below the sliding cover (30) and cooperating with a predetermined groove of the shell (1) to realize bidirectional sliding adjustment, a trigger pin assembly (33), a fixed pin assembly (34), and a buckle assembly (32) arranged on the top of the firing rod (31), wherein the buckle assembly (32) and the fixed pin assembly (34) are connected with corresponding components of the elastic assembly (5), and a firing button (35) arranged on both lower ends of the firing rod (31) for pressing and driving the firing rod (31) to slide along the shell (1).

7. The in-situ sampling and biopsy needle device of claim 6, wherein: The buckle assembly (32) comprises a first buckle (321) and a second buckle (322) movably arranged at the top of both ends 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 with the corresponding members of the elastic assembly (5) and are position-limited through the trigger pin assembly (33), and the first buckle (321) and the second buckle (322) are respectively buckled with the first buckle locking slot (222) and the second buckle locking slot (232) to achieve position locking.

8. The in-situ sampling and biopsy needle device of claim 7, wherein: 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), and a third fixing pin (343) is arranged on one side of the second buckle (322) near one end of the firing rod (31), and the fixing pin assembly (34) further comprises a fourth fixing pin (344) and a fifth fixing pin (345) arranged on the inner wall of the corresponding side of the shell (1) for limiting the elastic members of the elastic assembly (5) connected with the corresponding ends of the first buckle (321) and the second buckle (322) at a predetermined position.

9. The in-situ sampling and biopsy needle device of claim 8, wherein: The trigger pin assembly (33) comprises a first trigger pin (331) arranged on one side of the first buckle (321) near one end of the firing rod (31), and further comprises a second trigger pin (332) arranged on the top of one end of the firing rod (31) near the fifth fixing pin (345) for position-limiting the second buckle (322).

10. The in-situ sampling and biopsy needle device of claim 9, wherein: The upper string mechanism (4) comprises an upper string body (40) arranged below the upper string base sliding block (231) on the shell (1), a groove (41) is arranged on one side of the top of the upper string body (40) and connected with the upper string pin (233) to achieve one-way position-limiting control, and a thimble hole (42) is arranged on the outer side wall of one end of the upper string body (40) near the groove (41) and is sleeved with the corresponding member of the elastic assembly (5).

11. The in-situ sampling and biopsy needle device of claim 10, wherein: The elastic assembly (5) comprises a first elastic piece (51), a second elastic piece (52), a third elastic piece (53) and a fourth elastic piece (54); two ends of the first elastic piece (51) are connected with the reciprocating base (22) and the upper chord base sliding block (231) respectively, two ends of the second elastic piece (52) are connected with the upper chord base sliding block (231) and the second stop block (212) respectively, one end of the third elastic piece (53) is limited on the corresponding one side inner wall of the shell (1) through the fourth fixed pin (344) and the other end of the third elastic piece (53) is connected with the corresponding one end of the first buckle (321), one end of the fourth elastic piece (54) is limited on the corresponding one side inner wall of the shell (1) through the fifth fixed pin (345) and the other end of the fourth elastic piece (54) is connected with the corresponding one end of the second buckle (322).

12. The in-situ sampling and biopsy needle device of claim 11, wherein: The elastic assembly (5) further comprises an eighth elastic piece (58), one end of the eighth elastic piece (58) is connected with the one end of the shaft (244) close to the first base (2411), and the other end of the eighth elastic piece (58) is connected with the limiting block (301).

13. The in-situ sampling and biopsy needle device of claim 10, wherein: The needle group (6) comprises an outer needle tube assembly (62) arranged on the top of the reciprocating base (22), and an inner needle rod assembly (61) arranged on the top of the inner needle rod base sliding block (241) and the puncture end of which is sleeved with the outer needle tube assembly (62).

14. The in-situ sampling and biopsy needle device of claim 13, wherein: The outer needle tube assembly (62) comprises an outer needle tube seat (621) arranged on the top of the reciprocating base (22) and provided with a through cavity for the puncture end of the inner needle rod assembly (61) to pass through, and an outer needle tube (622) for sleeving with the puncture end of the inner needle rod assembly (61) is arranged on the through cavity of the outer needle tube seat (621) away from the inner needle rod assembly (61).

15. The in-situ sampling and biopsy needle device of claim 14, wherein: The inner needle rod assembly (61) comprises an inner needle rod seat (611) arranged on the top of the inner needle rod base sliding block (241) and connected with the second fixed key pin (243), the position of the inner needle rod seat (611) corresponds to the position of the outer needle tube seat (621), and an inner needle rod (612) provided with a sampling bin (6121) capable of extending into the inner needle tube (622) to implement sampling operation in working is arranged on the inner needle rod seat (611) away from the outer needle tube seat (621).

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