Sampling driving structure for biopsy needle

Abstract

The utility model discloses a sampling driving structure for a biopsy needle. The sampling driving structure comprises a shell part, a back-and-forth movement module is arranged on the shell part and is connected with an elastic driving module for controlling the back-and-forth movement of the elastic driving module; the shell part is further provided with a percussion module used for limiting the position of the back-and-forth movement module, and the percussion module is connected with an elastic control module and used for controlling the movement of the elastic control module. And the winding module is arranged in the shell part, is connected with the back-and-forth movement module and is used for controlling the back-and-forth movement module to slide. The utility model has the advantages that the percussion stroke can be timely adjusted in the sampling process so as to improve the puncture sampling positioning precision and meet the preset sampling requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field more specifically, especially, particularly relates to a biopsy needle is with sampling drive structure. BACKGROUND

[0002] Biopsy needle is the medical instrument for obtaining sample from human tissue to carry out pathological diagnosis in clinic. At present, biopsy needle commonly is the biopsy needle of manual drive control, and mainly relies on the clinician to control the position of biopsy needle to adjust the puncture sampling position in the process of puncture sampling, cannot adjust the firing stroke of biopsy needle in time according to the position of pathological tissue to meet the predetermined sampling demand in the process of sampling, leading to the tedious operation process of sampling adjustment, and the puncture sampling position positioning precision is low, difficult to meet the actual application demand.

[0003] How to solve the above problems becomes a technical problem to be solved urgently. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem to provide a biopsy needle is with sampling drive structure that can adjust the firing stroke in time to improve the puncture sampling positioning precision and meet the predetermined sampling demand in the process of sampling.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme as follows:

[0006] A biopsy needle is with sampling drive structure, including shell portion;The back-and-forth movement module is set on the shell portion and is connected with a elastic drive module for controlling its back-and-forth movement;Still set on the shell portion there is a for the back-and-forth movement module is implemented position definition firing module and the firing module is connected with a elastic control module for controlling its activity;Still include the upper chord module that is set in the shell portion and is connected with back-and-forth movement module for controlling the back-and-forth movement module sliding.

[0007] Preferably, the shell portion includes bottom shell and the first side shell that is set on the bottom shell and is close to the side of patient, still includes the second side shell that is set on the bottom shell and is away from the other side of the first side shell through a third side shell;The first boss and the second boss are respectively set with the firing module, back-and-forth movement module on the inside both sides of the bottom shell, still set on the bottom shell near the second boss one end bottom a for the operator operation upper chord module action upper chord window, set on the bottom shell near the second boss one end outer wall state indication window and the sliding groove for the activity piece of back-and-forth movement module sliding.

[0008] Preferably, a side groove is arranged at each end of the first boss for the corresponding button member of the firing module to move in, a first groove is arranged at the top of the first boss for the firing member of the firing module to slide in, a first fixing hole and a second fixing hole are arranged at the top of each side end of the first boss for the corresponding member of the firing module to connect with, and a third fixing hole and a fourth fixing hole are arranged at the middle of the top of the first boss for the elastic control module to be installed.

[0009] Preferably, the firing module comprises a sliding cover arranged at the top of the first boss and combined with the bottom shell, the top of the sliding cover is limited in position by a limiting block matched with the back-and-forth movement module, a firing rod is arranged below the sliding cover and matched with the first groove to slide back and forth, a buckle adjusting assembly is arranged at the top of the firing rod and connected with the corresponding member of the elastic control module, and a firing button is arranged at the lower end of each side of the firing rod for pressing to control the firing rod to slide along the bottom shell.

[0010] Preferably, the buckle adjusting assembly comprises a first fixing pin and a second fixing pin for respectively installing the corresponding two ends of the firing rod in the first fixing hole and the second fixing hole, a first buckle and a second buckle are arranged at the top of the firing rod by the first fixing pin and the second fixing pin and connected with the elastic control module, the first buckle and the second buckle are matched with the back-and-forth movement module to be locked in position, a third fixing pin is arranged at one end of the firing rod close to the second fixing pin and located at one side of the second buckle, a first trigger pin is arranged at one end of the firing rod close to the first fixing pin and located at one side of the first buckle, and a second trigger pin is arranged at the front end of the firing rod close to the second buckle for limiting the position of the second buckle.

[0011] Preferably, the elastic control module comprises a third elastic member arranged in the third fixing hole by a fourth fixing pin and connected with the corresponding end of the first buckle, and a fourth elastic member arranged in the fourth fixing hole by a fifth fixing pin and connected with the corresponding end of the second buckle.

[0012] Preferably, the reciprocating movement module comprises a sliding component provided on the bottom shell and the first side shell and the third side shell, a reciprocating base with a first buckle locking groove is provided on the sliding component close to the patient end, an upper chord base with a second buckle locking groove is provided on the sliding component away from the reciprocating base end, and the bottom of the upper chord base can extend downward to the top of the upper chord module, and an inner needle rod base capable of sliding relative to the sliding cover is provided on the upper chord base and connected with the external sampling needle, wherein the elastic driving module is provided on the sliding component, the upper chord base.

[0013] Preferably, the sliding component comprises a first stopper and a second stopper provided on the outer wall of the first side shell and the third side 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 base is slidably provided on the sliding shaft between the first stopper and the third stopper, and the upper chord base is slidably provided on the sliding shaft between the second stopper and the third stopper.

[0014] The upper chord base comprises an upper chord base sliding block slidably provided on the sliding shaft and having a second buckle locking groove for position locking by the second buckle, an upper chord pin extending downward to the top of the upper chord module is provided on the bottom of the upper chord base sliding block, a positioning pin connected with the inner needle rod base is provided on the top of the corresponding end of the upper chord base sliding block, and an elastic member second fixing pin for connecting with the elastic driving module is provided on the top of the end of the upper chord base sliding block away from the positioning pin.

[0015] The inner needle rod base comprises an inner needle rod base sliding block provided above the upper chord base sliding block and connected with the positioning pin to limit the position, a first base table and a second base table are respectively provided on the two ends of one side of the inner needle rod base sliding block and located above the sliding cover and in sliding contact with the top of the sliding cover, a shaft connected with the elastic driving module is provided between the first base table and the second base table, a fixed key pin two connected with the external sampling needle is provided on the top of the inner needle rod base sliding block, and a pushing sliding key is provided on the other side wall of the inner needle rod base sliding block away from the shaft and capable of extending out of the sliding groove and sliding along the sliding groove.

[0016] Preferably, the upper chord module comprises an upper chord body arranged on the bottom shell below the upper chord base sliding block, a groove is arranged on one side top of the upper chord body and connected with the upper chord pin to realize one-way limiting control, and a thimble hole is arranged on the outer side wall of one end of the upper chord body close to the groove and matched with the corresponding component of the elastic driving module.

[0017] Preferably, the elastic driving module comprises a first elastic member, a second elastic member and an eighth elastic member; the two ends of the first elastic member are connected with the reciprocating motion base and the upper chord base sliding block respectively, the two ends of the second elastic member are connected with the upper chord base sliding block and the second stopper respectively, one end of the eighth elastic member is connected with the end of the shaft close to the first bottom table, and the other end of the eighth elastic member is connected with the limiting block.

[0018] Compared with the prior art, the utility model has the beneficial effects as follows:

[0019] In the utility model, under the limitation of the shell part, the corresponding stopper component of the reciprocating motion module is driven to rotate from the first position to the second position by adjusting the adjusting knob component, so that the reciprocating motion module and the firing module are linked, in the process, the operator can adjust the firing stroke at will through the upper chord module before or after the upper chord and before the firing according to the actual demand, so as to adjust the firing stroke to the appropriate active position to improve the puncture sampling positioning precision and meet the predetermined sampling demand, when adjusting the firing stroke, the elastic driving module and the elastic control module are compressed or stretched to generate elastic potential energy, which can provide driving force for the subsequent firing stroke to drive the reciprocating motion module and the firing module to move according to the predetermined active stroke to realize the puncture sampling operation, therefore, the utility model has the advantages that the firing stroke can be adjusted in time in the sampling process to improve the puncture sampling positioning precision and meet the predetermined sampling demand. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings and embodiments.

[0021] Figure 1 It is a three-dimensional schematic view of the sampling driving structure of the biopsy needle.

[0022] Figure 2 It is a shell part schematic view of the sampling driving structure of the biopsy needle. Figure 1 ;

[0023] Figure 3 It is a shell part schematic view of the sampling driving structure of the biopsy needle. Figure 2 ;

[0024] Figure 4 is the firing module schematic diagram of the sampling driving structure for biopsy needle Figure 1 ;

[0025] Figure 5 is the firing module schematic diagram of the sampling driving structure for biopsy needle Figure 2 ;

[0026] Figure 6 is the reciprocating motion module schematic diagram of the sampling driving structure for biopsy needle Figure 1 ;

[0027] Figure 7 is the reciprocating motion module schematic diagram of the sampling driving structure for biopsy needle Figure 2 ;

[0028] Figure 8 is the reciprocating motion module schematic diagram of the sampling driving structure for biopsy needle Figure 3 ;

[0029] Figure 9 is the reciprocating motion module schematic diagram of the sampling driving structure for biopsy needle Figure 4 ;

[0030] Figure 10 is the reciprocating motion module schematic diagram of the sampling driving structure for biopsy needle Figure 5 ;

[0031] Figure 11 is the upper chord module schematic diagram of the sampling driving structure for biopsy needle. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application.

[0033] Reference Figures 1 to 11As shown, a biopsy needle sampling drive structure includes a housing portion 1; a reciprocating movement module 2 is arranged on the housing portion 1 and connected with an elastic drive module 6 for controlling the reciprocating movement thereof; a firing module 3 is also arranged on the housing portion 1 and connected with an elastic control module 5 for controlling the movement thereof; and an upper string module 4 is arranged in the housing portion 1 and connected with the reciprocating movement module for controlling the sliding of the reciprocating movement module 2. In use, under the limitation of the housing portion 1, the reciprocating movement module 2 is prevented from being linked with the firing module 3 by adjusting the adjusting knob member of the reciprocating movement module 2 to drive the corresponding block member thereof to rotate from the first position to the second position. In this process, the operator can adjust the firing stroke through the upper string module 4 at will before or after stringing and before or after firing according to the actual demand, so as to adjust the firing stroke to an appropriate movement position to improve the puncture sampling positioning accuracy and meet the predetermined sampling demand. When the firing stroke is adjusted, the elastic drive module 6 and the elastic control module 5 are compressed or stretched to generate elastic potential energy, which can provide driving force for the subsequent firing stroke to drive the reciprocating movement module 2 and the firing module 3 to move according to the predetermined movement stroke to realize the puncture sampling operation, thereby effectively improving the convenience and safety of use.

[0034] In the embodiment, the housing portion 1 includes a bottom shell 11 and a first side shell 12 arranged on the bottom shell 11 near the patient side, and a second side shell 122 arranged on the bottom shell 11 away from the first side shell 12 through a third side shell 13; a first boss 14 and a second boss 15 connected with the firing module 3 and the reciprocating movement module 2 are respectively arranged on both sides of the inside of the bottom shell 11; a stringing window 16 for the operator to operate the action of the upper string module 4 is arranged on the bottom of the end of the bottom shell 11 near the second boss 15; a state indicating window 18 and a sliding groove 17 for the moving part of the reciprocating movement module 2 to slide are arranged on the outer wall of the end of the bottom shell 11 near the second boss 15. A side recess 1111 for the corresponding button member of the firing module 3 to move is arranged on both ends of the first boss 14; a first recess 1112 for the firing member of the firing module 3 to slide bidirectionally is arranged on the top of the first boss 14; a first fixing hole 1113 and a second fixing hole 1114 connected with the corresponding members of the firing module 3 are arranged on the top of both sides of the first boss 14; and a third fixing hole 1115 and a fourth fixing hole 1116 for installing the elastic control module 5 are arranged at the middle position of the top of the first boss 14.

[0035] In the embodiment, the firing module 3 comprises a sliding cover 30 arranged on top of the first boss 14 and combined with the bottom shell 11, and the top of the sliding cover 30 is limited in position by cooperating with the reciprocating module 2 through a limiting block 301. A firing rod 31 is arranged below the sliding cover 30 and cooperates with the first groove 1112 to realize bidirectional reciprocating sliding adjustment. The firing module 3 further comprises a buckle adjustment assembly 32 arranged on top of the firing rod 31 and connected with corresponding components of the elastic control module 5. A firing button 33 is arranged on both lower ends of the firing rod 31 to press and control the sliding of the firing rod 31 along the bottom shell 11.

[0036] In the embodiment, the buckle adjustment assembly 32 comprises a first fixing pin 341 and a second fixing pin 342 for respectively mounting corresponding two ends of the firing rod 31 in the first fixing hole 1113 and the second fixing hole 1114. The buckle adjustment assembly 32 further comprises a first buckle 321 and a second buckle 322 arranged on top of the firing rod 31 through the first fixing pin 341 and the second fixing pin 342 and connected with the elastic control module 5. The first buckle 321 and the second buckle 322 are snap-fitted with the reciprocating module 2 to realize position locking. A third fixing pin 343 is arranged on one end of the firing rod 31 close to the second fixing pin 342 and located on one side of the second buckle 322. A first trigger pin 331 is 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. A second trigger pin 332 is arranged on the firing rod 31 in front of the second buckle 322 to limit the position of the second buckle 322.

[0037] In the embodiment, the elastic control module 5 comprises a third elastic member 53 arranged on the third fixing hole 1115 through a fourth fixing pin 344, and one end of the third elastic member 53 is connected with a corresponding end of the first buckle 321. The elastic control module 5 further comprises a fourth elastic member 54 arranged on the fourth fixing hole 1116 through a fifth fixing pin 345, and one end of the fourth elastic member 54 is connected with a corresponding end of the second buckle 322.

[0038] In use, one end of the third elastic member 53 of the elastic control module 5 is in abutment with the inner wall of the bottom shell 11, and the other end is in abutment with the first buckle 321 of the buckle adjusting assembly 32. 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 fixed pin 341. The first trigger pin 331 limits the clockwise rotation of the first buckle 321. In addition, after the first buckle 321 rotates counterclockwise around the first fixed pin 341, the third elastic member 53 has a function of resetting the first buckle 321. One end of the fourth elastic member 54 is in abutment with the inner wall of the bottom shell 11, and the other end is in abutment 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 fixed pin 342. The third fixed pin 343 limits the counterclockwise rotation of the second buckle 322. In addition, after the first buckle 321 rotates clockwise around the second fixed pin 342, the fourth elastic member 54 has a function of resetting the second buckle 322. The first trigger pin 331, the second trigger pin 332, and the third fixed pin 343 are installed in the firing rod 31. The first firing button 351 and the second firing button 352 are connected to the firing rod 31. Operating the first firing button 351 or the second firing button 352 can drive the firing rod 31 to slide along the first groove 1112. The first trigger pin 331 and the second trigger pin 332 can make the first buckle 321 and the second buckle 322 rotate, respectively, under the driving action of the firing rod 31.

[0039] In the present embodiment, the back-and-forth movement module 2 comprises a sliding component 21 arranged on the bottom shell 11 and the first side shell 12 and the third side shell 13. A back-and-forth movement base 22 with a first buckle locking groove 222 is arranged on the sliding component 21 near the patient end. An upper chord base 23 with a second buckle locking groove 232 is arranged on the sliding component 21 away from the back-and-forth movement base 22. The bottom of the upper chord base 23 can extend downward to the top of the upper chord module 4. An inner needle rod base 24 that can slide relative to the sliding cover 30 is arranged on the upper chord base 23 and connected to an external sampling needle. The elastic driving module 6 is arranged on the sliding component 21 and the upper chord base 23.

[0040] In the embodiment, the sliding component 21 comprises a first stopper 211 and a second stopper 212 arranged on the outer wall of the first side shell 12 and the third side shell 13, a sliding shaft 210 arranged between the first stopper 211 and the second stopper 212, one end of the sliding shaft 210 extending out of the second stopper 212 and connected with an adjusting knob 214, and a third stopper 213 detachably arranged on the sliding shaft 210, wherein the back-and-forth movement base 22 is slidingly arranged on the sliding shaft 210 and located between the first stopper 211 and the third stopper 213, and the upper chord base 23 is slidingly arranged on the sliding shaft 210 and located between the second stopper 212 and the third stopper 213.

[0041] The upper chord base 23 comprises an upper chord base sliding block 231 slidingly arranged on the sliding shaft 210 and provided with a second buckle locking groove 232 for position locking in cooperation with the second buckle 322, an upper chord pin 233 arranged at the bottom of the upper chord base sliding block 231 and extending downward to the top of the upper chord module 4, a positioning pin 234 arranged at the top of a corresponding end of the upper chord base sliding block 231 and connected with the inner needle rod base 24, and a second elastic element fixing pin 235 arranged at the top of an end of the upper chord base sliding block 231 away from the positioning pin 234 and used for connecting with the elastic driving module 6.

[0042] 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 limit the position, a first bottom table 2411 and a second bottom table 2412 arranged at two ends of one side of the inner needle rod base sliding block 241 respectively and located above the sliding cover 30 and in sliding contact with the top of the sliding cover 30, a shaft 244 arranged between the first bottom table 2411 and the second bottom table 2412 and connected with the elastic driving module 6, a second fixed key pin 243 arranged at the top of the inner needle rod base sliding block 241 and connected with an external sampling needle, and a pushing sliding key 242 arranged on the other side wall of the inner needle rod base sliding block 241 away from the shaft 244 and capable of extending out of the sliding groove 17 and sliding along the sliding groove 17.

[0043] In the embodiment, the elastic driving module 6 comprises a first elastic element 51, a second elastic element 52, and an eighth elastic element 58. Two ends of the first elastic element 51 are connected with the back-and-forth movement base 22 and the upper chord base sliding block 231 respectively, two ends of the second elastic element 52 are connected with the upper chord base sliding block 231 and the second stopper 212 respectively, one end of the eighth elastic element 58 is connected with the shaft 244 close to the first bottom table 2411, and the other end of the eighth elastic element 58 is connected with the limiting block 301.

[0044] In use, the eighth elastic member 58 of the elastic driving module 6 is arranged between the first bottom base 2411 and the limiting block 301, has a reset function, pushes the sliding key 242 to be able to slide on the sliding groove 17 of the bottom shell 11, and in addition, operating the sliding key 242 can also drive the inner needle rod base 24 to reciprocate above the sliding cover 30 relative to the bottom shell 11.

[0045] In the embodiment, the upper chord module 4 comprises an upper chord body 40 arranged below the upper chord base sliding block 231 on the bottom shell 11, a recess 41 is arranged on one side top of the upper chord body 40 and connected with the upper chord pin 233 to realize one-way limiting control, and a thimble hole 42 is arranged on the outer side wall of one end of the upper chord body 40 close to the recess 41 and matched with the corresponding member of the elastic driving module 6. In use, the recess 41 of the upper chord module 4 is connected with the upper chord pin 233 of the upper chord base 23, and when the upper chord body 40 slides from the first end to the second end in the bottom shell 11, the one-way limiting action of the recess 41 on the upper chord pin 233 can drive the upper chord base 23 to slide to the predetermined proximal end.

[0046] The tissue sampling process of the embodiment is explained as follows:

[0047] For details Figures 1 to 11Before cocking and before the stage of being ready to fire, when the inner needle rod base 24 is connected with the external sampling needle, the bottom shell 11 is operated to make the external sampling needle extend into the patient's body to a predetermined position, and then the firing button 33 is operated to make the firing module 3 and the reciprocating motion module 2 be linked, and the reciprocating motion base 22 moves along a track during the whole linkage process, i.e., from the first position of the reciprocating motion base 22 to the second position of the reciprocating motion base 22, and then from the second position of the reciprocating motion base 22 to the first position of the reciprocating motion base 22, during which the reciprocating motion base 22 drives the corresponding outer needle tube of the external sampling needle to move, i.e., the outer needle tube of the sampling needle moves from the first position to the proximal end side and moves to the second position of the outer needle tube, so as to expose the sampling compartment of the sampling needle to the outside of the outer needle tube, and the human tissue has the elastic property, so the human tissue automatically enters the sampling compartment, and then the outer needle tube returns to the first position of the outer needle tube under the driving action of the reciprocating motion base 22, during which the outer needle tube cuts the human tissue to be saved in the sampling compartment; after the sampling is completed, the bottom shell 11 is operated to withdraw the external sampling needle from the patient's body, the pushing sliding key 242 of the inner needle rod base 24 is operated to move along the sliding groove 17 of the bottom shell 11 to the distal end side, and when the inner needle rod base 24 moves to the distal end side, the inner needle rod of the sampling needle also moves to the distal end side under the driving of the inner needle rod base 24, the normal distance between the first base table 2411 and the limiting block 301 is shortened, and the eighth elastic member 58 is compressed, when the inner needle rod base 24 moves from the first position thereof to the second position thereof, the sampling compartment of the inner needle rod is exposed, at this time, the medical staff extracts the human tissue sample in the sampling compartment, and releases the pushing sliding key 242, the inner needle rod base 24 is reset from the second position thereof to the first position thereof under the elastic action of the eighth elastic member 58, the sampling compartment of the inner needle rod returns to the inner cavity of the outer needle tube, and the sampling is completed, and if multiple sampling is required, the operation can be repeated.

[0048] The cocking process of the embodiment is explained as follows:

[0049] For details, see Figures 1 to 11Before cocking, the reciprocating base 22, the cocking base 23 and the cocking module 4 are all in their first positions, the proximal side of the reciprocating base 22 is connected with the cocking base 23, and the distal side of the reciprocating base 22 is connected with the first stopper 211, both of which are located at the distal side of the sliding shaft 210; at this time, the first buckle 321 in the firing module 3 is connected with the first buckle locking groove 222 of the reciprocating base 22, so that the reciprocating base 22 is in a locked state, limiting the sliding of the reciprocating base 22; the cocking body 40 of the cocking module 4 is pressed or pushed through the cocking window 16 of the bottom shell 11 to slide from its first position to its second position; the cocking module 4 drives the cocking base 23 to slide along the sliding shaft 210 to the proximal end by the limiting action of the top end groove 41 on the cocking pin 233, and the cocking base 23 moves from its first position to its second position; when the cocking base 23 moves to its second position, the second buckle 322 is connected with the second buckle locking groove 232 of the cocking base 23, and then the second buckle locking groove 232 limits the movement of the cocking base 23, and the cocking 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, the cocking module 4 is released, and under the action of the elastic force of the predetermined elastic member, the cocking module 4 is reset to move from its second position to its first position; at this time, the sampling driving structure is in a cocking standby state.

[0050] The firing control principle of the embodiment is explained as follows:

[0051] For details, see Figures 1 to 11, after the cocking operation is completed, the first trigger button 351 or the second trigger button 352 is pressed to drive the firing rod 31 to slide along the first groove 1112 of the bottom shell 11 to the proximal end, 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 also move, pressing the trigger button 33 drives the firing rod 31 to move from the first position of the firing rod 31 to the second position of the firing rod 31 and the third position of the firing rod 31 in turn, in the process that the firing rod 31 moves from the first position thereof to the second position thereof, the first trigger pin 331 links with the first buckle 321, in the moving process of the first trigger pin 331, the first trigger pin 331 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 second position thereof, the first buckle 321 reaches the maximum rotation stroke, the first buckle 321 is separated from the first buckle locking groove 222, and the locking state of the reciprocating base 22 is released, in this process, the second trigger pin 332 does not link with the second buckle 322, so that the cocking base 23 is still in the locking state, the second position of the cocking base 23 remains unchanged, then the first elastic member 51 releases the elastic potential energy, drives the predetermined elastic member first fixed pin of the reciprocating base 22 to slide at high speed along the sliding shaft 210 to the proximal end, and then reaches the second position of the reciprocating base 22 under the limiting action of the third stop block 213; in the process that the firing rod 31 moves from the second position thereof to the third position thereof, the first buckle 321 is still in the maximum rotation stroke position, the first trigger pin 331 mainly plays a limiting role on the first buckle 321 at this time, and the second trigger pin 332 links with the second buckle 322, in the moving process of the second trigger pin 332, the second trigger pin 332 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 thereof from the second position thereof, the second buckle 322 reaches the maximum rotation stroke, the second buckle 322 is separated from the second buckle locking groove 232, and the locking state of the cocking base 23 is released, then the second elastic member 52 releases the elastic potential energy, drives the cocking base 23 to slide at high speed along the sliding shaft 210 to the distal end, moves from the second position of the cocking base 23 to the first position of the cocking base 23, and pushes the reciprocating base 22 to move to the distal end, and moves from the second position of the reciprocating base 22 to the first position of the reciprocating base 22.When the first trigger button 351 or the second trigger button 352 is released, the elastic action of the third elastic member 53 and the fourth elastic member 54 respectively causes the first clasp 321 and the second clasp 322 to rotate and reset to the initial position before firing, and 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, and the firing rod 31 is reset from the third position to the first position.

[0052] The adjustment of the firing stroke of the present embodiment is described as follows:

[0053] For details, see Figures 1 to 11 Before cocking, or after the completion of cocking operation, or before firing,

[0054] The adjustment of the firing stroke actually adjusts the sliding stroke of the reciprocating base 22, the sliding stroke of the reciprocating base 22 ranges between the first stop block 211 and the third stop block 213, and the actual length of the reciprocating base 22 sliding along the sliding shaft 210 in each implementation of the human tissue sampling process is equivalent to the firing stroke of the in-situ sampling at that time, and also equivalent to the one-way movement length of the outer needle tube at that time. The actual length of the reciprocating base 22 along the sliding shaft 210 is the normal distance from the proximal side of the reciprocating base 22 to the predetermined step of the third stop block 213. When the first clasp 321 is disengaged from the first clasp locking groove 222, the locking state of the reciprocating base 22 is released, and the reciprocating base 22 slides at high speed along the sliding shaft 210 to the proximal side under the action of the first elastic member 51, when the proximal side of the reciprocating base 22 is in contact with the predetermined step of the third stop block 213, the reciprocating base 22 stops sliding, and in this process, the maximum displacement of the reciprocating base 22 along the sliding shaft 210 to the proximal side is the firing stroke.

[0055] After the completion of the cocking operation, the adjustment knob 214 is turned from the first position to the second position, and the third stop block 213 is turned, and the firing stroke is adjusted from the A stroke to the B stroke; wherein the predetermined elastic positioning pin plays a role of preventing the adjustment knob 214 from being misoperated and improving the operation feeling of the adjustment knob 214.

[0056] The operation process of the firing stroke adjustment before cocking of the present embodiment is basically the same as the above, and only needs to turn the adjustment knob 214 from the first position to the second position, and the third stop block 213 will also be turned from the first position to the second position. During the entire adjustment process, the adjustment knob 214 and the third stop block 213 do not link with the reciprocating module 2 and the firing module 3, therefore, the operator can adjust the firing stroke at will before cocking or after cocking, before firing, to meet the sampling requirements.

[0057] In summary, the utility model discloses the structure above, with in the sampling process can adjust the striking program in time to improve the puncture sampling positioning accuracy and satisfy the scheduled sampling demand's advantage.

[0058] For those skilled in the art, according to the above described technical solutions and concepts, other various corresponding changes and deformations can be made, and all these changes and deformations should belong to the protection scope of the utility model claims.

Claims

1. A sampling drive structure for a biopsy needle comprising a housing part (1); characterized in that: The shell part (1) is provided with a back-and-forth movement module (2) and the back-and-forth movement module (2) is connected with an elastic driving module (6) for controlling the back-and-forth movement; the shell part (1) is also provided with a firing module (3) for limiting the position of the back-and-forth movement module (2) and the firing module (3) is connected with an elastic control module (5) for controlling the activity; and the shell part (1) is further provided with an upper string module (4) arranged in the shell part (1) and connected with the back-and-forth movement module (2) for controlling the sliding of the back-and-forth movement module (2).

2. The biopsy needle sampling drive structure of claim 1, wherein: The shell part (1) comprises a bottom shell (11), a first side shell (12) arranged on the bottom shell (11) near the side of the patient, a second side shell (122) arranged on the bottom shell (11) away from the first side shell (12) through a third side shell (13), a first boss (14) and a second boss (15) arranged on the inside of the bottom shell (11) on both sides respectively and connected with the firing module (3) and the back-and-forth movement module (2), an upper string window (16) arranged on the bottom shell (11) near the bottom of the end of the second boss (15) for the operator to operate the action of the upper string module (4), a state indicating window (18) arranged on the outer wall of the end of the bottom shell (11) near the second boss (15) and a sliding groove (17) for the sliding of the moving part of the back-and-forth movement module (2).

3. The biopsy needle sampling drive structure of claim 2, wherein: The first boss (14) is provided with a side recess (1111) on both ends for the activity of the corresponding button component of the firing module (3), a first recess (1112) on the top for the bidirectional sliding of the firing component of the firing module (3), a first fixed hole (1113) and a second fixed hole (1114) on the top of both sides of the first boss (14) and connected with the corresponding components of the firing module (3), and a third fixed hole (1115) and a fourth fixed hole (1116) arranged at the middle position of the top of the first boss (14) for installing the elastic control module (5).

4. The biopsy needle sampling drive structure of claim 3, wherein: The firing module (3) comprises a sliding cover (30) arranged on the top of the first boss (14) and combined with the bottom shell (11), the top of the sliding cover (30) is matched with the back-and-forth movement module (2) through a limiting block (301) to limit the position, a firing rod (31) arranged below the sliding cover (30) and matched with the first recess (1112) to realize the bidirectional back-and-forth sliding adjustment, a buckle adjustment assembly (32) arranged on the top of the firing rod (31) and connected with the corresponding components of the elastic control module (5), and a firing button (33) arranged on both sides of the lower end of the firing rod (31) for pressing and controlling the sliding of the firing rod (31) along the bottom shell (11).

5. The biopsy needle sampling drive structure of claim 4, wherein: The buckle adjusting assembly (32) comprises first and second fixing pins (341, 342) for mounting respective two ends of the firing rod (31) on the first and second fixing holes (1113, 1114), respectively, and first and second buckles (321, 322) provided on the top of the firing rod (31) through the first and second fixing pins (341, 342) and connected with the elastic control module (5), and the first and second buckles (321, 322) are clamped with the reciprocating movement module (2) to realize position locking, a third fixing pin (343) is arranged on the firing rod (31) near one end of the second fixing pin (342) and on one side of the second buckle (322), a first trigger pin (331) is arranged on the firing rod (31) near one end of the first fixing pin (341) and on one side of the first buckle (321), and a second trigger pin (332) for limiting the position of the second buckle (322) is arranged on the firing rod (31) at the front end of the second buckle (322).

6. The biopsy needle sampling drive structure of claim 5, wherein: The elastic control module (5) comprises a third elastic member (53) provided on the third fixing hole (1115) through a fourth fixing pin (344), and one end of the third elastic member (53) is connected with a corresponding end of the first buckle (321), and the elastic control module (5) further comprises a fourth elastic member (54) provided on the fourth fixing hole (1116) through a fifth fixing pin (345), and one end of the fourth elastic member (54) is connected with a corresponding end of the second buckle (322).

7. The biopsy needle sampling drive structure of claim 5, wherein: The reciprocating movement module (2) comprises a sliding component (21) provided on the bottom shell (11) and the first and third side shells (12, 13), a reciprocating movement base (22) with a first buckle locking groove (222) is arranged on the sliding component (21) near the end close to the patient, an upper chord base (23) with a second buckle locking groove (232) is arranged on the sliding component (21) away from the reciprocating movement base (22), and the bottom of the upper chord base (23) can extend downward to the top of the upper chord module (4), and the reciprocating movement module (2) further comprises an inner needle rod base (24) provided on the upper chord base (23) and capable of sliding relative to the sliding cover (30), and the inner needle rod base (24) is connected with an external sampling needle, wherein the elastic driving module (6) is provided on the sliding component (21) and the upper chord base (23).

8. The biopsy needle sampling drive structure of claim 7, wherein: The sliding part (21) comprises a first stopper (211) and a second stopper (212) arranged on the outer wall of the first side shell (12) and the third side shell (13), a sliding shaft (210) is arranged between the first stopper (211) and the second stopper (212), one end of the sliding shaft (210) penetrates the second stopper (212) and extends out of the external part to be connected with an adjusting knob (214), a third stopper (213) is detachably arranged on the sliding shaft (210), the back-and-forth movement base (22) is slidably arranged on the sliding shaft (210) and located between the first stopper (211) and the third stopper (213), and the upper chord base (23) is slidably arranged on the sliding shaft (210) and located between the second stopper (212) and the third stopper (213); The upper chord base (23) comprises an upper chord base sliding block (231) slidably arranged on the sliding shaft (210) and provided with a second buckle locking groove (232) for position locking in cooperation with the second buckle (322), an upper chord pin (233) extending downward to the top of the upper chord module (4) is arranged at the bottom of the upper chord base sliding block (231), a positioning pin (234) connected with the inner needle rod base (24) is arranged at the top of the corresponding end of the upper chord base sliding block (231), and an elastic member second fixing pin (235) for connection with the elastic driving module (6) is arranged at the top of the 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) are respectively arranged at the two ends of one side of the inner needle rod base sliding block (241) and located above the sliding cover (30) and in sliding contact with the top of the sliding cover (30), a shaft (244) connected with the elastic driving module (6) is arranged between the first bottom table (2411) and the second bottom table (2412), a fixed key pin two (243) connected with the external sampling needle 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 can extend out of the external part of the sliding groove (17) and slide along the sliding groove (17).

9. The biopsy needle sampling drive structure of claim 8, wherein: The upper chord module (4) comprises an upper chord body (40) arranged on the bottom shell (11) below the upper chord base sliding block (231), a groove (41) is arranged on one side top of the upper chord body (40) and connected with the upper chord pin (233) to realize one-way limiting control, and a thimble hole (42) is arranged on the outer side wall of one end of the upper chord body (40) near the groove (41) and matched with the corresponding component of the elastic driving module (6).

10. The biopsy needle sampling drive structure of claim 9, wherein: The elastic driving module (6) comprises a first elastic member (51), a second elastic member (52) and an eighth elastic member (58); the two ends of the first elastic member (51) are connected with the reciprocating movement base (22) and the upper chord base sliding block (231) respectively, the two ends of the second elastic member (52) are connected with the upper chord base sliding block (231) and the second stop block (212) respectively, one end of the eighth elastic member (58) is connected with the shaft (244) near one end of the first bottom table (2411), and the other end of the eighth elastic member (58) is connected with the limiting block (301).

Images