Biopsy needle with three usage modes

Abstract

The present application relates to a biopsy needle having three usage modes. The biopsy needle includes an upper cover, a base, an inner needle assembly, an outer needle assembly, a loading assembly, a first rear excitation assembly, a second rear excitation assembly, a first side excitation assembly, and a second side excitation assembly. The biopsy needle loads the outer needle assembly and the inner needle assembly successively through the loading assembly, excites the inner needle assembly through the first rear excitation assembly or the first side excitation assembly, excites the outer needle assembly through the second rear excitation assembly or the second side excitation assembly, and can also excite the inner needle assembly through the second rear excitation assembly or the second side excitation assembly when the inner needle assembly is not excited, thereby providing three usage modes for the user to select according to actual needs, and facilitating the user to flexibly select rear excitation or side excitation operations according to the actual situation.

Description

Technical Field

[0001] The present application relates to medical devices, and more particularly, to a biopsy needle having three usage modes. Background Art

[0002] In recent years, tumors have lurked around humans and the incidence rate has gradually increased. Early detection and timely treatment can greatly prevent the pathological changes of tumors. This requires puncturing and sampling of lesion cells or tissues under ultrasonic guidance for pathological analysis and diagnosis. A very important tool for puncturing and sampling is a biopsy needle, which is divided into a manual biopsy needle, a semi-automatic biopsy needle, and a fully automatic biopsy needle. Currently, the existing fully automatic biopsy needles have a single firing mode. Either they can only be fired once or they can only be fired twice, and the firing operation method is also limited, making it impossible for users to conveniently select the most suitable firing mode and operation method according to different situations. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a biopsy needle having three usage modes and convenient operation in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present application to solve its technical problems is: to propose a biopsy needle, including an upper cover, a base, an inner needle assembly, and an outer needle assembly. The inner needle assembly includes an inner needle seat and an inner needle fixedly installed on the inner needle seat. The outer needle assembly includes an outer needle seat and an outer needle fixedly installed on the outer needle seat. The inner needle seat and the outer needle seat are respectively installed in the combined upper cover and base in a reciprocatingly slidable and elastically loaded manner in the needle insertion direction. The inner needle and the outer needle extend from the front end in the needle insertion direction of the combined upper cover and base, and the inner needle passes through the outer needle. The biopsy needle further includes a loading assembly, a first post-firing assembly, a second post-firing assembly, a first side-firing assembly, and a second side-firing assembly, wherein:

[0005] The loading assembly is arranged on the upper cover in a reciprocatingly slidable manner along a direction parallel to the needle insertion direction. The loading assembly and the outer needle seat are respectively provided with a first loading cooperation structure that cooperates with each other to elastically load the outer needle seat in place when the loading assembly slides backward. The loading assembly and the inner needle seat are respectively provided with a second loading cooperation structure that reaches a cooperation after the outer needle seat is loaded in place to elastically load the inner needle seat in place when the loading assembly slides backward;

[0006] The first rear excitation component and the second rear excitation component are respectively installed at the rear ends in the needle insertion direction of the combined upper cover and the base, the first rear excitation component is provided with a first rear excitation button which can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited, and the second rear excitation component is provided with a second rear excitation button which can act on the outer needle seat to cause the outer needle seat to release the loading state and be excited, and can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited when the inner needle seat is not excited;

[0007] The first side excitation component and the second side excitation component are respectively installed on one side of the needle insertion direction in the combined upper cover and the base, the first side excitation component is provided with a first side excitation button which can act on the inner needle seat to prompt the inner needle seat to release the loading state and be excited, the second side excitation component is provided with a second side excitation button which can act on the outer needle seat to prompt the outer needle seat to release the loading state and be excited, and can act on the inner needle seat when the inner needle seat is not excited to prompt the inner needle seat to release the loading state and be excited.

[0008] According to one embodiment of the biopsy needle described in the present application, the loading assembly includes a loading button, a loading seat and a first reset spring. The loading seat is slidably installed in a loading slide groove opened in the upper cover and extending in a direction parallel to the needle insertion direction. The loading button is fixedly connected to the loading seat and exposed to the outside of the upper cover. The first reset spring is arranged between the loading seat and the upper cover to cause the loading seat to reset after the loading seat slides backward along the loading slide groove.

[0009] According to one embodiment of the biopsy needle described in the present application, the first loading matching structure includes a loading rod extending downward from the front end of the loading seat and a loading boss protruding from the outer needle seat. The loading seat slides backward along the loading slot so that the loading rod and the loading boss abut against each other, thereby driving the outer needle seat to slide backward and load into place.

[0010] According to one embodiment of the biopsy needle described in the present application, the second loading cooperation structure includes two loading V-grooves arranged on both sides of the rear end of the loading seat and two tongues extending forward from the inner needle seat, a connecting rod is connected between the two tongues, and the outer needle seat is also provided with an action rod which is inserted between the two tongues of the inner needle seat after loading into place to push the connecting rod upward so that the two tongues are matched with the two loading V-grooves, and the loading seat slides backward along the loading slide groove so that the two loading V-grooves and the two tongues of the inner needle seat abut against each other, thereby driving the inner needle seat to slide backward to load into place.

[0011] In one embodiment of the biopsy needle according to the present application, on one side of the inner needle hub in the needle insertion direction, there is a first elastic piece extending obliquely forward in the needle insertion direction. An inner needle loading spring is arranged between the inner needle hub and the base. When the inner needle hub slides backward under the drive of the loading component until the front end of the first elastic piece abuts against the corresponding first loading limit surface in the base, the inner needle hub is loaded in place; on the corresponding side of the outer needle hub in the needle insertion direction, there is a second elastic piece extending obliquely forward in the needle insertion direction. An outer needle loading spring is arranged between the outer needle hub and the base. When the outer needle hub slides backward under the drive of the loading component until the front end of the second elastic piece abuts against the corresponding second loading limit surface in the base, the outer needle hub is loaded in place.

[0012] In one embodiment of the biopsy needle according to the present application, the first rear activation button and the second rear activation button are both installed on the left and right sides of the rear end of the base in a manner that can be pressed and elastically reset; the first rear activation button is provided with a first rear activation member extending towards the first elastic piece of the inner needle hub. When the first rear activation button is pressed, the first rear activation member pushes forward against the first elastic piece abutting against the first loading limit surface to cause the first elastic piece to disengage from the first loading limit surface and release the limit, so that the inner needle hub and the inner needle are activated under the action of the elastic force of the inner needle loading spring; the second rear activation button is provided with a second rear activation member extending towards the second elastic piece of the outer needle hub. When the second rear activation button is pressed, the second rear activation member pushes forward the first elastic piece of the inner needle hub that has not been activated and abuts against the first loading limit surface to cause the first elastic piece to disengage from the first loading limit surface and release the limit, so that the inner needle hub and the inner needle are activated under the action of the elastic force of the inner needle loading spring. When the second rear activation button is continuously pressed, the second rear activation member pushes forward the second elastic piece of the outer needle hub that abuts against the second loading limit surface to cause the second elastic piece to disengage from the second loading limit surface and release the limit, so that the outer needle hub and the outer needle are activated under the action of the elastic force of the outer needle loading spring.

[0013] In one embodiment of the biopsy needle according to the present application, the first side activation button and the second side activation button are both installed in an installation position formed by combining the upper cover and one side of the base in a manner that can slide back and forth; the first side activation button is fixedly connected to the first rear activation member of the first rear activation button, and the second side activation button is fixedly connected to the second rear activation member of the second rear activation button.

[0014] In one embodiment of the biopsy needle according to the present application, the first-side excitation button and the second-side excitation button are both installed in an installation position formed on one side of the combined upper cover and base in a manner that they can be pressed and elastically reset; when the first-side excitation button is pressed, it inwardly pushes against the first elastic sheet in contact with the first loading limit surface to cause the first elastic sheet to disengage from the first loading limit surface and release the limit, so that the inner needle seat and the inner needle are excited under the action of the elastic force of the inner needle loading spring; when the second-side excitation button is pressed, it inwardly pushes the first elastic sheet in contact with the first loading limit surface of the inner needle seat that has not been excited to cause the first elastic sheet to disengage from the first loading limit surface and release the limit, so that the inner needle seat and the inner needle are excited under the action of the elastic force of the inner needle loading spring. When the second-side excitation button is continuously pressed, it inwardly pushes the second elastic sheet in contact with the second loading limit surface of the outer needle seat to cause the second elastic sheet to disengage from the second loading limit surface and release the limit, so that the outer needle seat and the outer needle are excited under the action of the elastic force of the outer needle loading spring.

[0015] In one embodiment of the biopsy needle according to the present application, the inner needle is fixedly arranged at the lower end of the inner needle seat, the outer needle is fixedly arranged at the lower end of the outer needle seat, and both the inner needle seat and the outer needle seat are limited in the internal space where the upper cover and the base are combined in the up, down, left, and right directions and can only move back and forth along the needle insertion direction.

[0016] In one embodiment of the biopsy needle according to the present application, a partition for separating the first rear excitation button and the second rear excitation button is further provided in the combined upper cover and base.

[0017] Implementing the biopsy needle of the present application has the following beneficial effects: The biopsy needle according to the embodiment of the present application realizes the sequential loading of both the outer needle assembly and the inner needle assembly through a loading component, and separately sets a first rear excitation component, a first side excitation component for the inner needle assembly and a second rear excitation component, a second side excitation component for the outer needle assembly. The inner needle assembly is excited by the first rear excitation component or the first side excitation component, the outer needle assembly is excited by the second rear excitation component or the second side excitation component, and the inner needle assembly can also be excited by the second rear excitation component or the second side excitation component when the inner needle assembly has not been excited, so as to provide three usage modes, namely, a full-automatic excitation mode, a delayed full-automatic excitation mode, and a full-automatic leading range mode, for the user to select according to actual needs, and can facilitate the user to flexibly select rear excitation or side excitation operations according to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0019] Figure 1 is the overall structural schematic diagram of the biopsy needle with three usage modes according to the first embodiment of the present application;

[0020] Figure 2 Is Figure 1 A schematic structural view of the upper cover of the biopsy needle shown;

[0021] Figure 3 Is Figure 2 A schematic structural view of the upper cover from another angle shown;

[0022] Figure 4 Is Figure 1 A schematic structural view of the base of the biopsy needle shown;

[0023] Figure 5 Is Figure 4 A schematic structural view of the base from another angle shown;

[0024] Figure 6 Is a schematic structural view of the loading seat in the first embodiment of the present application;

[0025] Figure 7 Is Figure 6 A schematic structural view of the loading seat from another angle shown;

[0026] Figure 8 Is a schematic structural view of the inner needle seat in the first embodiment of the present application;

[0027] Figure 9 Is Figure 8 A sectional view of the structure of the inner needle seat shown;

[0028] Figure 10 Is a schematic structural view of the outer needle seat in the first embodiment of the present application;

[0029] Figure 11 Is Figure 10 A sectional view of the structure of the outer needle seat shown;

[0030] Figure 12 Is a partial sectional view of the cooperation between the inner needle seat and the upper cover and the base in the first embodiment of the present application;

[0031] Figure 13 Is a partial sectional view of the cooperation between the outer needle seat and the upper cover and the base in the first embodiment of the present application;

[0032] Figure 14 Is a sectional view of the structure of the biopsy needle in the first embodiment of the present application when both the inner needle assembly and the outer needle assembly are in the initial state;

[0033] Figure 15 Is a sectional view of the structure of the biopsy needle in the first embodiment of the present application when the outer needle assembly is in the loading state;

[0034] Figure 16It is a structural cross-sectional view of the biopsy needle in the first embodiment of the present application when both the outer needle assembly and the inner needle assembly are in the loaded state;

[0035] Figure 17 It is a schematic structural diagram of the first post-excitation assembly in the first embodiment of the present application;

[0036] Figure 18 It is a schematic structural diagram of the second post-excitation assembly in the first embodiment of the present application;

[0037] Figure 19 It is a schematic internal structure diagram of the biopsy needle in the first embodiment of the present application after removing the upper cover and the loading assembly thereon;

[0038] Figure 20 It is a schematic overall structure diagram of the biopsy needle with three usage modes in the second embodiment of the present application;

[0039] Figure 21 It is Figure 20 A schematic internal structure diagram of the biopsy needle shown after removing the upper cover and the loading assembly thereon. Detailed implementation manners

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Moreover, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0041] Figure 1 It shows a schematic overall structure diagram of the biopsy needle 100 with three usage modes according to the first embodiment of the present application. As Figure 1As shown, the biopsy needle 100 with three usage modes mainly consists of an upper cover 10, a base 20, an inner needle assembly 30, an outer needle assembly 40, a loading assembly 50, a first rear excitation assembly 60, a second rear excitation assembly 70, a first side excitation assembly 80, and a second side excitation assembly 90. The upper cover 10 and the base 20 are combined to enclose an internal space. The inner needle assembly 30 and the outer needle assembly 40 are respectively installed in the upper cover 10 and the base 20 in a reciprocatingly slidable and elastically loaded manner in the needle insertion direction. The inner needle 31 of the inner needle assembly 30 and the outer needle 41 of the outer needle assembly 40 extend from the front ends in the needle insertion direction of the upper cover 10 and the base 20, and the inner needle 31 is inserted through the outer needle 41. The loading assembly 50 is arranged on the upper cover 10 in a slidable manner along a direction parallel to the needle insertion direction, and is used to sequentially apply a backward moving force to the outer needle assembly 40 and the inner needle assembly 30 to make the outer needle assembly 40 and the inner needle assembly 30 in a loaded state. The first rear excitation assembly 60 and the second rear excitation assembly 70 are respectively arranged on the left and right at the rear end in the needle insertion direction of the upper cover 10 and the base 20, and the first side excitation assembly 80 and the second side excitation assembly 90 are respectively arranged on the front and rear at the left side of the upper cover 10 and the base 20. The first rear excitation assembly 60 is used to act on the inner needle assembly 30 to release the loaded state of the inner needle assembly 30 and be excited. Similarly, the first side excitation assembly 80 is also used to act on the inner needle assembly 30 to release the loaded state of the inner needle assembly 30 and be excited. The second rear excitation assembly 70 is used to act on the outer needle assembly 40 to release the loaded state of the outer needle assembly 40 and be excited. The second rear excitation assembly 70 is also used to act on the inner needle assembly 30 to release the loaded state of the inner needle assembly 30 and be excited when the inner needle assembly 30 is not excited. Similarly, the second side excitation assembly 90 is used to act on the outer needle assembly 40 to release the loaded state of the outer needle assembly 40 and be excited. The second side excitation assembly 90 is also used to act on the inner needle assembly 30 to release the loaded state of the inner needle assembly 30 and be excited when the inner needle assembly 30 is not excited. The biopsy needle 100 according to the first embodiment of the present application realizes three usage modes through the cooperation of the loading assembly 50 with the first rear excitation assembly 60, the second rear excitation assembly 70, the first side excitation assembly 80, and the second side excitation assembly 90, which is convenient for doctors to select the most suitable excitation mode according to different situations during use, and provides the most timely and suitable biopsy plan for patients. The following will be combined with Figures 2 to 19 give a more detailed introduction.

[0042] Specifically refer to Figures 2 to 5As shown, the upper cover 10 and the base 20 are combined through a cooperating snap positioning structure. The upper cover 10 is provided with a plurality of snaps 111 along its inner circumference and two first positioning posts 112 at the rear end. Correspondingly, the base 20 is provided with a plurality of snap grooves 211 along its inner circumference and two positioning holes 212 at the rear end. Align the two first positioning posts 112 of the upper cover 10 with the two positioning holes 212 of the base 20 and insert them, and engage the plurality of snaps 111 with the plurality of snap grooves 211, then the upper cover 10 and the base 20 can be combined. The upper cover 10 and the base 20 are respectively provided with a first needle outlet fitting 12 and a second needle outlet fitting 22 at the front ends in the needle insertion direction. After the upper cover 10 and the base 20 are combined, the two surround to form a needle outlet near the lower end of the base 20, for the outer needle 41 and the inner needle 31 inserted into the outer needle 41 to be loaded and recycled or excited and ejected through the needle outlet. Specifically, as Figure 2 and Figure 3 shown, the first needle outlet fitting 12 is provided at the lower end of a support arm 121 extending downward from the front end of the upper cover 10. The end of the support arm 121 is further provided with two second positioning posts 122 protruding downward on both sides of the first needle outlet fitting 12. Correspondingly, as Figure 5 shown, the front end of the base 20 is respectively provided with positioning grooves 233 on both sides of the second needle outlet fitting 22. When the upper cover 10 and the base 20 are combined, the second positioning posts 122 are embedded in the positioning grooves 233 to prevent the front end from deforming after the biopsy needle 100 is assembled. Moreover, the needle outlet formed by the cooperation of the first needle outlet fitting 12 and the second needle outlet fitting 22 is arranged near the lower end of the base 20, making it easier for the inner needle 31 and the outer needle 41 to cooperate with auxiliary devices such as an ultrasonic probe. In order to make the needle insertion axes of the inner needle 31 and the outer needle 41 as close as possible to the base 20, and the direction of the elastic loading and excitation force is bound to be misaligned and non-coaxial with the needle insertion axes of the inner and outer needles. Therefore, a limiting structure that can make the inner needle seat 32 and the outer needle seat 42 slide reciprocally without skewing needs to be provided jointly in the upper cover 10 and the base 20 to ensure that the inner needle 31 and the outer needle 41 do not skew and cause unsmooth needle ejection. The upper cover 10 is provided with a partition 13 protruding toward the base 20 at the rear end in the needle insertion direction, and the rear end of the base 20 is provided with a slot 234 for the partition 13 to be inserted. After the upper cover 10 and the base 20 are combined, the partition 13 is inserted into the slot 234 to divide the open space at the rear end of the base 20 into two parts on the left and right, which are respectively used to install the first post-excitation assembly 60 and the second post-excitation assembly 70. The upper cover 10 is provided with a first installation groove 161 and a second installation groove 162 arranged front and rear along the needle insertion direction on the left side, and the base 20 is correspondingly provided with a third installation groove 231 and a fourth installation groove 232 arranged front and rear along the needle insertion direction on the left side. After the upper cover 10 and the base 20 are combined, the first installation groove 161 and the third installation groove 231 jointly surround to form an installation position for installing the first side excitation assembly 80, and the second installation groove 162 and the fourth installation groove 232 jointly surround to form an installation position for installing the second side excitation assembly 90.

[0043] Further referring to Figure 8 and Figure 9 combining Figure 14 and Figure 19 as shown, the inner needle assembly 30 is mainly composed of an inner needle 31, an inner needle seat 32 and an inner needle loading spring 33. Specifically, as Figure 8 and Figure 9 shown, the inner needle 31 is a solid needle rod, a sampling groove 311 is provided at the front end of the inner needle 31, and the rear end of the inner needle 31 is fixedly arranged at the lower end of the inner needle seat 32 in the needle insertion direction (for example, fixed by glue or integral injection molding, etc.), so that the inner needle 31 can move together with the inner needle seat 32. The upper end of the inner needle seat 32 in the needle insertion direction is provided with a first identification post 326 extending upward, and two tongue pieces 324a and 324b extending horizontally forward at a certain distance are provided on the front side of the upper end, and a connecting rod 325 is connected between the two tongue pieces 324a and 324b. Loading inclined surfaces 3241 are formed at the front ends of the two tongue pieces 324a and 324b, and grooves 3242 are respectively formed on the upper surfaces of the rear ends of the two tongue pieces 324a and 324b. A first elastic piece 323 extends obliquely forward in the needle insertion direction from the left side of the inner needle seat 32 in the needle insertion direction, and a first abutting surface 3231 is formed at the front end of the first elastic piece 323. A first guiding groove 327 is formed on the right side of the inner needle seat 32 in the needle insertion direction, and the first guiding groove 327 extends along the needle insertion direction. The inner needle seat 32 also opens a first spring installation hole 328 at the rear end in the needle insertion direction, and a first spring guiding post 3281 is arranged in the first spring installation hole 328 for installing the inner needle loading spring 33. Combining Figure 3 , Figure 5 , Figure 12 , Figure 14 and Figure 19 shown, the inner needle seat 32 is slidably installed relative to the outer needle seat 42 in the rear part of the internal space formed by the combination of the upper cover 10 and the base 20. First limiting bosses 241 and second limiting bosses 242 extending upward are provided on the left and right sides in the base 20 for the inner needle seat 32, and guiding bosses 181 and limiting ribs 182 extending downward are provided on the left and right sides in the upper cover 10 for the inner needle seat 32. The left and right sides of the inner needle seat 32 are respectively provided with two left and right side surfaces 321 that are in contact with the inner side surfaces of the first limiting boss 241 and the second limiting boss 242 for left and right limiting. The bottom surfaces 322 are respectively provided on the left and right sides of the inner needle seat 32 to support the upper end surfaces of the first limiting boss 241 and the second limiting boss 242 for downward limiting. At the same time, the guiding boss 181 in the upper cover 10 is slidably inserted into the first guiding groove 327 of the inner needle seat 32, and the limiting rib 182 abuts against the upper end surface of the inner needle seat 32, so as to not only provide a guiding function in the needle insertion direction but also perform upward limiting on the inner needle seat 32 (refer to Figure 12As shown, the inner needle seat 32 is thus limited within the internal space of the upper cover 10 and the base 20 and can only move back and forth in the needle insertion direction without axial deflection. Refer to Figure 14 As shown, the front end of the inner needle loading spring 33 abuts against the first spring mounting hole 328 of the inner needle seat 32, and the rear end of the inner needle loading spring 33 is sleeved within the first spring mounting seat 261 provided within the base 20 and is supported by the first spring support platform 2611 (refer to Figure 5 As shown). If a force is applied to move the inner needle seat 32 backward, the inner needle loading spring 33 will be compressed. When the inner needle seat 32 is moved backward to the point where the first abutting surface 3231 at the front end of the first elastic piece 323 abuts against the first loading limiting surface 271 provided on the inner wall of the base 20 (refer to Figure 5 As shown), the inner needle seat 32 is loaded in place, and the elastic force of the inner needle loading spring 33 causes the first abutting surface 3231 of the first elastic piece 323 to tightly abut against the first loading limiting surface 271 on the inner wall of the base 20.

[0044] Further refer to Figure 10 and Figure 11 Combined with Figure 14 and Figure 19 As shown, the outer needle assembly 40 mainly consists of an outer needle 41, an outer needle seat 42, and an outer needle loading spring 43. Specifically, as Figure 10 and Figure 11 shown, the outer needle 41 is a hollow needle tube, and the rear end of the outer needle 41 is fixedly provided at the lower end of the outer needle seat 42 in the needle insertion direction to move together with the outer needle seat 42. At the upper end of the outer needle seat 42 in the needle insertion direction, there is a loading boss 422. The front end of the loading boss 422 forms a loading mating surface 4221. The rear end of the loading boss 422 extends horizontally backward to form an action rod 424, and the rear end of the action rod 424 forms an action inclined surface 4241. The loading boss 422 is also provided with a second identification post 425 extending upward. On the left side of the outer needle seat 42 in the needle insertion direction, a second elastic piece 423 extends obliquely forward toward the needle insertion direction, and the front end of the second elastic piece 423 forms a second abutting surface 4231. On the right side of the outer needle seat 42 in the needle insertion direction, there is a second guiding groove 426, and the second guiding groove 426 extends along the needle insertion direction. The outer needle seat 42 also has a second spring mounting hole 427 at the rear end in the needle insertion direction, and a second spring guiding post 4271 is provided within the second spring mounting hole 427 for mounting the outer needle loading spring 43. Combined with Figure 3 、 Figure 5 、 Figure 13 、 Figure 14 and Figure 19As shown, the outer needle holder 42 is slidably mounted relative to the inner needle holder 32 at the front of the internal space formed by the combination of the upper cover 10 and the base 20. The front end of the outer needle 41 passes through the needle outlet formed by the upper cover 10 and the base 20 through the bushing 411 to ensure coaxiality. The inner needle 31 is inserted into the outer needle 41 from the rear end of the outer needle 41. In the initial state, the sampling groove 311 at the front end of the inner needle 31 is stored inside the front end of the outer needle 41. On the left and right sides inside the base 20, there are provided a third limiting boss 243 and a fourth limiting boss 244 extending upward for the outer needle holder 42. The guiding boss 181 and the limiting rib 182 provided inside the upper cover 10 also extend along the needle insertion direction to the outer needle holder 42. On both sides of the outer needle holder 42, there are respectively provided two left and right side surfaces 4212 that are in contact with the inner side surfaces of the third limiting boss 243 and the fourth limiting boss 244 for left and right limiting. On both sides of the outer needle holder 42, there are also respectively provided bottom surfaces 4211 that are supported on the upper end surfaces of the third limiting boss 243 and the fourth limiting boss 244 for downward limiting. At the same time, the guiding boss 181 extending downward inside the upper cover 10 is slidably inserted into the second guiding groove 426 of the outer needle holder 42, and the limiting rib 182 abuts against the upper end surface of the inner needle holder 32, thereby not only providing a guiding function in the needle insertion direction but also performing upward limiting on the outer needle holder 42. In this way, the outer needle holder 42 is limited in the internal space of the upper cover 10 and the base 20 and can only move back and forth along the needle insertion direction without axial deflection. Referring again to Figure 14 As shown, the front end of the outer needle loading spring 43 abuts against the second spring mounting hole 427 of the outer needle holder 42, and the rear end of the outer needle loading spring 43 is sleeved on the second spring mounting post 2621 of the second spring mounting seat 262 provided inside the base 20. If a force is applied to move the outer needle holder 42 backward, the outer needle loading spring 43 will be compressed. When the outer needle holder 42 is moved backward to the second contact surface 4231 at the front end of the second elastic piece 423 abuts against the second loading limiting surface 272 provided on the inner wall of the base 20 (see Figure 5 shown), the outer needle holder 42 is loaded in place, and the elastic force of the outer needle loading spring 43 causes the second contact surface 4231 of the second elastic piece 423 to tightly abut against the second loading limiting surface 272 on the inner wall of the base 20.

[0045] Further referring to Figure 1 、 Figure 6 and Figure 7 in combination with Figures 14 to 16As shown, the loading component 50 mainly consists of a loading button 51, a loading base 52, and a first return spring 53. A loading chute 14 extending in a direction parallel to the needle insertion direction is provided at the front part of the upper cover 10. The loading base 52 is slidably installed in the loading chute 14. The loading button 51 is fixedly connected to the loading base 52 and exposed outside the upper cover 10. Applying a backward force to the loading button 51 can drive the loading base 52 to move backward along the loading chute 14, thereby acting on the outer needle seat 42 or the inner needle seat 32 to load the outer needle assembly 40 or the inner needle assembly 30 in place. The elastic force of the first return spring 53 causes the loading base 52 and the loading button 51 to reset to the initial position after the backward force is released. Specifically, as Figure 6 and Figure 7 shown, the loading base 52 is provided with a loading slider 522 on its upper end surface 521, and a T-shaped boss 523 is provided in the middle of the loading slider 522. First limiting holes 524a and second limiting holes 524b are provided on both sides of the T-shaped boss 523 of the loading slider 522. The loading base 52 is also provided with two loading V-grooves 525a and 525b on both sides of the rear end in the needle insertion direction, which cooperate with two tongues 324a and 324b of the inner needle seat 32, and a loading rod 526 extending downward from the front end in the needle insertion direction, which cooperates with the loading boss 422 of the outer needle seat 42. Referring again to Figure 14 shown, the loading base 52 is slidably installed in the loading chute 14 of the upper cover 10 through the loading slider 522. The upper end surface 521 of the loading base 52 abuts against the inner surface of the upper cover 10 for upward limiting. Two elastic latches 511a and 511b corresponding to the T-shaped boss 523 are provided in the loading button 51 to latch the T-shaped boss 523 for up and down limiting. At the same time, the loading button 51 is also provided with a first limiting post 512a and a second limiting post 512b inserted into the first limiting hole 524a and the second limiting hole 524b on the loading slider 522, so as to ensure that the loading button 51 is fixedly installed on the loading base 52. Moving the loading button 51 can drive the loading base 52 to move back and forth along the loading chute 14. Referring again to Figure 7 and Figure 3 shown, a third spring mounting post 527 is provided at the bottom of the loading base 52, and a fourth spring mounting post 17 is provided inside the upper cover 10 in front of the loading base 52. The two ends of the first return spring 53 are respectively hooked on the third spring mounting post 527 and the fourth spring mounting post 17. Applying a backward force to move the loading base 52 backward along the loading chute 14 will stretch the return spring 53. Therefore, after the backward force is released, the return spring 53 drives the loading base 52 to move forward and reset. Specifically, as Figure 7 shown, a stopper 5271 is also provided on the outer periphery of the third spring mounting post 572 to prevent the first return spring 53 from coming off.

[0046] The following will be combined with Figures 14 to 16A detailed introduction to the specific process of the loading component 50 loading the inner needle component 30 and the outer needle component 40: First, as Figure 14 shown, the loading component 50, the inner needle component 30, and the outer needle component 40 are all in the initial state. The sampling groove 311 of the inner needle 31 is stored inside the front end of the outer needle 41. At this time, applying a backward force to the loading button 51 can drive the loading seat 52 to move backward along the loading chute 14. The loading surface 5261 of the loading rod 526 protruding downward at the front end of the loading seat 52 will first abut against the loading mating surface 4221 at the front end of the loading boss 422 of the outer needle seat 42, thereby driving the outer needle seat 42 and the outer needle 41 to move backward together. The action rod 424 at the rear end of the outer needle seat 42 is inserted into the space between the two tongues 324a and 324b of the inner needle seat 32. When the outer needle seat 42 is moved backward to the second abutting surface 4231 at the front end of the second elastic piece 423 abuts against the second loading limit surface 272 provided on the inner wall of the base 20, the outer needle seat 42 is loaded in place. At this time, as Figure 15 shown, releasing the backward force on the loading button 51, the loading button 51 and the loading seat 52 will reset to the initial position under the action of the first return spring 53. The outer needle loading spring 43 is compressed, and the outer needle 41 moves backward and retracts together with the outer needle seat 42, and the sampling groove 311 of the inner needle 31 is exposed; moreover, at this time, the action rod 424 of the outer needle seat 42 touches the connecting rod 325 between the two tongues 324a and 324b of the inner needle seat 32, and the action rod 424 gradually jacks up the connecting rod 325 upward through the action inclined surface 4241 at the rear end, thereby driving the two tongues 324a and 324b connected to the connecting rod 325 to deform and jack up upward around the groove 3242, so that the two tongues 324a and 324b are in the Figure 15 tilted state shown. In addition, after the outer needle component 40 is loaded in place, as Figure 15 shown, the second identification column 425 on the outer needle seat 42 is exposed from the loading chute 14 for the user to observe and confirm. Then, applying a backward force to the loading button 51 again to drive the loading seat 52 to move backward along the loading chute 14. Since the outer needle seat 42 has been moved backward and loaded in place, the loading rod 526 at the front end of the loading seat 52 no longer functions, and the loading V-grooves 525a and 525b at the rear end of the loading seat 52 will respectively abut against the loading inclined surfaces 3241 at the front ends of the two upwardly inclined tongues 324a and 324b of the inner needle seat 32, thereby driving the inner needle seat 32 and the inner needle 31 to move backward together. When the inner needle seat 32 is moved backward to the first abutting surface 3231 at the front end of the first elastic piece 323 abuts against the first loading limit surface 271 provided on the inner wall of the base 20, the inner needle seat 32 is loaded in place. At this time, as Figure 16As shown, when the backward acting force on the release loading button 51 is released, the loading assembly 50 is reset to its initial position under the action of the first return spring 53. The inner needle loading spring 33 is compressed, and the inner needle 31 moves backward and retracts together with the inner needle seat 32. The sampling groove 311 of the inner needle 31 is again collected inside the front end of the outer needle 41. Moreover, when the inner needle seat 32 is loaded in place, as Figure 16 shown, the first identification post 326 on the inner needle seat 32 just emerges from the observation window 191 opened on the upper cover 10, so that the user can observe and confirm.

[0047] As described above, the biopsy needle 100 of the first embodiment of the present application realizes the elastic loading of the outer needle assembly 40 by providing a first loading cooperation structure formed by the cooperation of the loading rod 526 on the loading seat 52 and the loading boss 422 on the outer needle seat 42 between the loading assembly 50 and the outer needle assembly 40. The elastic loading of the inner needle assembly 30 is realized by providing a second loading cooperation structure formed by the cooperation of the loading V-grooves 525a, 525b on the loading seat 52 and the tongues 324a, 324b on the inner needle seat 32 between the loading assembly 50 and the inner needle assembly 30. And only after the outer needle assembly 40 is loaded in place can the second loading cooperation structure between the loading assembly 50 and the inner needle assembly 30 be made to cooperate. Therefore, the biopsy needle 100 of the first embodiment above of the present application not only realizes the loading of both the outer needle assembly 40 and the inner needle assembly 30 through one loading assembly 50, but also realizes the sequential loading of the outer needle assembly 40 and the inner needle assembly 30 through one loading assembly 50. In addition, in different embodiments of the present application, the first loading cooperation structure between the loading assembly 50 and the outer needle assembly 40 and the second loading cooperation structure between the loading assembly 50 and the inner needle assembly 30 are not limited to the specific structures shown in the first embodiment in the figure, and various other suitable cooperation structure forms can also be adopted, as long as the sequential loading of the outer needle assembly 40 and the inner needle assembly 30 can be realized through one loading assembly 50.

[0048] Further referring to Figure 17 and Figure 19 shown, the first post-excitation assembly 60 mainly consists of a first post-excitation button 61 and a second return spring 65. The first post-excitation button 61 is installed on the left side of the open space at the rear end of the base 20 in a pressable manner and is pressed and reset by the second return spring 65. Specifically, as Figure 17As shown, a first pressing slot 62 is provided at the bottom of the first rear trigger button 61, and a fifth spring mounting column 63 and a first rear trigger member 64 are respectively provided at the front end of the first rear trigger button 61. The first rear trigger member 64 is preferably a rod-shaped member extending to the left front, and a first rear trigger surface 641 is formed at the front end. The first side trigger assembly 80 includes a first side trigger button 81 and a first trigger connecting rod 82, which is fixedly connected to the front end of the first rear trigger member 64 through the first trigger connecting rod 82, thereby being integrated with the first rear trigger assembly 60. For further reference, Figure 19 Combination Figure 5 As shown, the first rear trigger button 61 is installed in the base 20, and a first fitting surface 2814 is formed on the right side of the bottom of the base 20, and a first protrusion 2811 is arranged on the first fitting surface 2814 to be inserted into the first pressing groove 62 of the first rear trigger button 61, so that the bottom surface of the first rear trigger button 61 and the first fitting surface 2814 of the base 20 form a fitting assembly and can slide forward and backward through the cooperation of the first protrusion 2811 and the first pressing groove 62. At the same time, a guide groove 283 is also arranged in the base 20 (see Figure 5 The first rear trigger member 64 of the first rear trigger button 61 is placed in the guide slot 283 and guided by the guide slot 283 to move forward. One end of the second return spring 65 is sleeved on the fifth spring mounting post 63 to abut against the first rear trigger button 61, and the other end of the second return spring 65 is sleeved on the sixth spring mounting post 2813 of the third spring mounting seat 2812 provided in the base 20 (see Figure 5 As shown). In this way, the force applied forward to press the first rear trigger button 61 can cause the first rear trigger button 61 to move forward along the first pressing slot 62, so that the first rear trigger surface 641 of the first rear trigger member 64 pushes forward the first spring plate 323 abutting against the first loading limit surface 271, causing the first spring plate 323 to disengage from the first loading limit surface 271 and release the limit, so that the inner needle seat 32 and the inner needle 31 are triggered by the elastic force of the inner needle loading spring 33. By releasing the force applied to the first rear trigger button 61, the first rear trigger button 61 can be reset under the elastic force of the second reset spring 65. See also Figure 19 As shown, when the first rear trigger assembly 60 is installed in place, the first side trigger button 81 of the first side trigger assembly 80 is installed in a forward and backward sliding manner in the installation position formed by the first installation groove 161 and the third installation groove 231 after the upper cover 10 and the base 20 are combined. The force applied forward to push the first side trigger button 81 can also drive the first rear trigger button 61 to move forward along the first pressing slide groove 62, thereby releasing the load of the inner needle assembly 30 through the first rear trigger member 64. When the force applied to the first side trigger button 81 is released, the first side trigger button 81 can be reset under the elastic force of the second reset spring 65.

[0049] Further refer to Figure 18 and Figure 19 As shown, the second post-excitation assembly 70 is mainly composed of a second post-excitation button 71 and a third return spring 75. The second post-excitation button 71 is installed on the right side of the open space at the rear end of the base 20 in a pressable manner and is pressed and reset by the third return spring 75. Specifically, as Figure 18 shown, a second press chute 72 is formed at the bottom of the second post-excitation button 71. A seventh spring mounting post 73 and a second post-excitation member 74 are respectively provided at the front end of the second post-excitation button 71. The second post-excitation member 74 is preferably a rod-shaped member extending forward and leftward, and a second post-excitation surface 741 is formed at the front end. The second post-excitation member 74 also forms a third post-excitation surface 742 at a corresponding position behind the second post-excitation surface 741. The second side-excitation assembly 90 includes a second side-excitation button 91 and a second excitation connecting rod 92, and is fixedly connected to the front end of the second post-excitation member 74 through the second excitation connecting rod 92, so as to be integrated with the second post-excitation assembly 70. Further refer to Figure 19 Combined with Figure 5 shown, the second post-excitation button 71 is installed in the base 20. A second fitting surface 2824 is formed on the left side of the bottom of the base 20, and a second protrusion 2821 is provided on the second fitting surface 2824 and inserted into the second press chute 72 of the second post-excitation button 71, so that the bottom surface of the second post-excitation button 71 forms a fitting assembly with the second fitting surface 2824 of the base 20 and can realize forward and backward sliding through the cooperation of the second protrusion 2821 and the second press chute 72. At the same time, the second post-excitation member 74 of the second post-excitation button 71 is stacked above the first post-excitation member 64 in the guiding chute 283 in the base 20, and the guiding chute 283 provides a guiding function for forward movement. One end of the third return spring 75 is sleeved on the seventh spring mounting post 73 and abuts against the second post-excitation button 71, and the other end of the third return spring 75 is sleeved on the eighth spring mounting post 2823 of the fourth spring mounting seat 2822 provided in the base 20 (see Figure 5In this way, the force applied to press the second rear trigger button 71 forward can make the second rear trigger button 71 move forward along the second pressing slot 72, so that firstly the third rear trigger surface 742 of the second rear trigger member 74 pushes forward the first elastic sheet 323 in contact with the first loading limit surface 271, prompting the first elastic sheet 323 to separate from the first loading limit surface 271 and release the limit, so that the inner needle seat 32 and the inner needle 31 are triggered by the elastic force of the inner needle loading spring 33, and then the second rear trigger surface 741 of the second rear trigger member 74 pushes forward the second elastic sheet 423 in contact with the second loading limit surface 272, prompting the second elastic sheet 423 to separate from the second loading limit surface 272 and release the limit, so that the outer needle seat 42 and the outer needle 41 are triggered by the elastic force of the outer needle loading spring 43. To ensure successful sampling and cutting, there is a slight travel difference between the second rear excitation surface 741 of the second rear excitation member 74 pushing against the second spring sheet 423 and the third rear excitation surface 742 pushing against the first spring sheet 323, that is, the third rear excitation surface 742 will first contact the first spring sheet 323 to excite the inner needle seat 32 and the inner needle 31, and then the second rear excitation surface 741 will contact the second spring sheet 423 to excite the outer needle seat 42 and the outer needle 41. Release the force applied to the second rear excitation button 71, and the second rear excitation button 71 can be reset under the elastic force of the third reset spring 75. See also Figure 19 As shown, when the second rear excitation assembly 70 is installed in place, the second side excitation button 91 of the second side excitation assembly 90 is installed in a manner that allows it to slide back and forth in the installation position formed by the second installation groove 162 and the fourth installation groove 232 after the upper cover 10 and the base 20 are combined. The force applied forward to push the second side excitation button 91 can also drive the second rear excitation button 71 to move forward along the second pressing slide 72, thereby releasing the load on the outer needle assembly 40 through the second rear excitation member 74 to excite the outer needle 41, and when the inner needle assembly 30 has not yet been excited, the load on the inner needle assembly 30 can also be released to excite the inner needle 31. By releasing the force applied to the second side excitation button 91, the second side excitation button 91 can be reset under the elastic force of the third reset spring 75. For further information, see Figure 3 As shown, the first limit platform 183a and the second limit platform 183b extend downwardly from the upper cover 10 opposite to the second return spring 65 and the third return spring 75. When the upper cover 10 and the base 20 are combined, the first limit platform 183a and the second limit platform 183b limit the second return spring 65 and the third return spring 75 from above to prevent them from falling out, thereby improving the smoothness of pressing.

[0050] As described above, the biopsy needle 100 of the first embodiment of the present application is provided with a first post-excitation component 60 and a second post-excitation component 70 for the inner needle assembly 30 and the outer needle assembly 40, respectively. The first post-excitation component 60 acts on the inner needle assembly 30 to release the inner needle assembly 30 from a loaded state and thereby excite the inner needle assembly 30, and the second post-excitation component 70 acts on the outer needle assembly 40 to release the outer needle assembly 40 from a loaded state and thereby excite the outer needle assembly 40. When the inner needle assembly 30 has not yet been excited, the second post-excitation component 70 can also act on the inner needle assembly 30 to release the inner needle assembly 30 from a loaded state and thereby excite the inner needle assembly 30. In addition, the biopsy needle 100 of the first embodiment of the present application is further provided with a first side excitation component 80 and a second side excitation component 90 for the inner needle assembly 30 and the outer needle assembly 40, respectively, and the first side excitation component 80 is linked with the first rear excitation component 60, and the second side excitation component 90 is linked with the second rear excitation component 70. The first side excitation component 80 acts on the inner needle assembly 30 to release the loading state of the inner needle assembly 30 and is excited, and the second side excitation component 90 acts on the outer needle assembly 40 to release the loading state of the outer needle assembly 40 and is excited. When the inner needle assembly 30 has not been excited yet, the second side excitation component 90 can also act on the inner needle assembly 30 to release the loading state of the inner needle assembly 30 and be excited.

[0051] Further, according to different embodiments of the present application, the first rear excitation member 64 of the first rear excitation assembly 60, the second rear excitation member 74 of the second rear excitation assembly 70, the linkage mode between the first side excitation assembly 80 and the first rear excitation assembly 60, and the linkage mode between the second side excitation assembly 90 and the second rear excitation assembly 70 are not limited to the specific structure of the first embodiment shown in the figure, and various other suitable structural forms can also be adopted, as long as the loading limit of the inner needle assembly 30 and the outer needle assembly 40 can be released. According to different embodiments of the present application, the second return spring 65 and the third return spring 75 can also be replaced by other elastic members, for example, they can be replaced by the elastic strips or elastic sheets provided by the first rear excitation button 61 and the second rear excitation button 71, or other suitable elastic return structures can be respectively adopted for the first rear excitation button 61 and the second rear excitation button 71, as long as they can achieve respective return after pressing.

[0052] The biopsy needle 100 with three usage modes according to the first embodiment of the present application is used as follows:

[0053] 1. Load

[0054] 1.1 As Figure 14 and Figure 15As shown in the figure, applying a backward force to the loading button 51 drives the loading seat 52 to move backward along the loading chute 14, thereby driving the outer needle seat 42 and the outer needle 41 to move backward together. When the second abutting surface 4231 at the front end of the second elastic piece 423 of the outer needle seat 42 abuts against the second loading limiting surface 272 on the inner wall of the base 20, the outer needle seat 42 is loaded in place; at the same time, the actuating rod 424 of the outer needle seat 42 pushes up the two tongues 324a and 324b of the inner needle seat 32, so that the two tongues 324a and 324b are in the Figure 15 tilted state shown in the figure. Releasing the backward force on the loading button 51, the loading button 51 and the loading seat 52 are reset to the initial position under the action of the first return spring 53.

[0055] 1.2 As shown in Figure 15 and Figure 16 the figure, applying a backward force to the loading button 51 again drives the loading seat 52 to move backward along the loading chute 14, thereby driving the inner needle seat 32 and the inner needle 31 to move backward together. When the first abutting surface 3231 at the front end of the first elastic piece 323 of the inner needle seat 32 abuts against the first loading limiting surface 271 on the inner wall of the base 20, the inner needle seat 32 is loaded in place. Releasing the backward force on the loading button 51, the loading button 51 and the loading seat 52 are reset to the initial position under the action of the first return spring 53.

[0056] 2. Excitation

[0057] 2.1 As shown in Figure 19 the figure, optionally applying pressure to the first rear excitation button 61 or the first side excitation button 81, the first rear excitation member 64 acts on the first elastic piece 323 of the inner needle seat 32 to disengage it from the first loading limiting surface 271 and release the limit, and the inner needle seat 32 and the inner needle 31 are then excited forward under the elastic force of the inner needle loading spring 33. Preferably, referring to Figure 5 and Figure 19 the figure, a first buffer pad mounting hole 251 is further provided at the front end of the forward excitation stroke of the inner needle seat 32 in the base 20 and a first buffer pad 291 is arranged therein to buffer the impact force of the inner needle seat 32 and reduce the working noise of the product.

[0058] 2.2 As shown in Figure 19 the figure, optionally applying pressure to the second rear excitation button 71 or the second side excitation button 91, the second rear excitation surface 741 of the second rear excitation member 74 acts on the second elastic piece 423 of the outer needle seat 42 to disengage it from the second loading limiting surface 272 and release the limit, and the outer needle seat 42 and the outer needle 41 are then excited forward under the elastic force of the outer needle loading spring 43. Preferably, referring to Figure 5 and Figure 19As shown, a second buffer pad mounting hole 252 is also provided at the front end of the forward excitation stroke of the outer needle needle seat 42 inside the base 20, and a second buffer pad 292 is arranged therein to buffer the impact force of the outer needle needle seat 42 and reduce the working noise of the product.

[0059] 2.3 As Figure 19 As shown, optionally apply pressure to the second rear excitation button 71 or the second side excitation button 91. The third rear excitation surface 742 of the second rear excitation member 74 first acts on the first elastic piece 323 of the inner needle needle seat 32, so that the inner needle assembly 30 is excited forward. Subsequently, the second rear excitation surface 741 of the second rear excitation member 74 acts on the second elastic piece 423 of the outer needle needle seat 42, so that the outer needle assembly 40 is excited forward.

[0060] 3. Usage Modes

[0061] 3.1 Automatic Excitation Mode

[0062] Execute the above loading steps 1.1 and 1.2, then control the biopsy needle 100 at a safe distance from the lesion, and then execute the above excitation step 2.3 to successively excite the inner needle assembly 30 and the outer needle assembly 40 for cutting and sampling.

[0063] 3.2 Delayed Automatic Mode

[0064] Execute the above loading steps 1.1 and 1.2, then control the biopsy needle 100 at a safe distance from the lesion, and then execute the above excitation step 2.1 to only excite the inner needle assembly 30. After confirmation, execute the above excitation step 2.2 to excite the outer needle assembly 40 for cutting and sampling.

[0065] 3.3 Automatic Zero Range Mode

[0066] After piercing the biopsy needle 100 into the lesion, execute the above loading step 1.1 to load the outer needle assembly 40 in place, and then execute the above excitation step 2.2 to excite the outer needle assembly 40 for cutting and sampling.

[0067] Combined with the above usage modes, for the convenience of users to distinguish, see Figure 1 As shown, the first rear excitation button 61 of the first rear excitation assembly 60 and the first side excitation button 81 of the first side excitation assembly 80 are respectively provided with the letter mark "S", corresponding to the above delayed automatic mode; the second rear excitation button 71 of the second rear excitation assembly 70 and the second side excitation button 91 of the second side excitation assembly 90 are respectively provided with the letter mark "A", corresponding to the above automatic excitation mode. Further, see Figure 1 and Figure 2As shown, a label slot 192 is further provided on the outer surface of the upper cover 10 for pasting a product label 193. The product labels 193 can be distinguished by different colors according to different needle types, which is convenient for users to select and use.

[0068] Figure 20 and Figure 21 FIG. shows a schematic structural diagram of a biopsy needle 200 having three usage modes according to the second embodiment of the present application. Refer to Figure 20 and Figure 21 As shown, the biopsy needle 200 according to the second embodiment of the present application has substantially the same structure as the biopsy needle 100 of the foregoing first embodiment, except that the first side excitation assembly 80 and the second side excitation assembly 90 are separately provided independently of the first rear excitation assembly 60 and the second rear excitation assembly 70. The first side excitation assembly 80 is composed of a first side excitation button 81 and a fourth return spring 83. The first side excitation button 81 is installed in an installation position jointly formed by the combination of the upper cover 10 and the bottom shell 20 in a manner that can be pressed inward, and is pressed and reset by the fourth return spring 83. By applying an inward pressing force on the first side excitation button 81, the excitation structure correspondingly provided on the first side excitation button 81 can be pushed inward to abut against the first elastic piece 323 of the first loading limit surface 271, so as to urge the first elastic piece 323 to disengage from the first loading limit surface 271 and release the limit, thereby enabling the inner needle seat 32 and the inner needle 31 to be excited under the elastic force of the inner needle loading spring 33. When the force applied to the first side excitation button 81 is released, the first side excitation button 81 can be reset under the elastic force of the fourth return spring 83. Similarly, the second side excitation assembly 90 is composed of a second side excitation button 91 and a fifth return spring 93. The second side excitation button 91 is installed in an installation position jointly formed by the combination of the upper cover 10 and the bottom shell 20 in a manner that can be pressed inward, and is pressed and reset by the fifth return spring 93. By applying an inward pressing force on the second side excitation button 91, the excitation structure correspondingly provided on the second side excitation button 91 can be pushed inward to abut against the second elastic piece 423 of the second loading limit surface 272, so as to urge the second elastic piece 423 to disengage from the second loading limit surface 272 and release the limit, thereby enabling the outer needle seat 42 and the outer needle 41 to be excited under the elastic force of the outer needle loading spring 43; if the inner needle assembly 30 has not been excited, pressing the second side excitation button 91 inward can also push the first spring 323 abutting against the first loading limit surface 271 inward, so as to urge the first elastic piece 323 to disengage from the first loading limit surface 271 and release the limit, thereby enabling the inner needle seat 32 and the inner needle 31 to be excited under the elastic force of the inner needle loading spring 33. When the force applied to the second side excitation button 91 is released, the second side excitation button 91 can be reset under the elastic force of the fifth return spring 93.

[0069] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A biopsy needle, comprising an upper cover, a base, an inner needle assembly and an outer needle assembly. The inner needle assembly includes an inner needle seat and an inner needle fixedly installed on the inner needle seat. The outer needle assembly includes an outer needle seat and an outer needle fixedly installed on the outer needle seat. The inner needle seat and the outer needle seat are respectively installed in the combined upper cover and base in a reciprocatingly slidable and elastically loaded manner in the needle insertion direction. The inner needle and the outer needle extend from the front end in the needle insertion direction of the combined upper cover and base, and the inner needle is inserted through the outer needle, characterized in that, The biopsy needle further comprises a loading assembly, a first rear excitation assembly, a second rear excitation assembly, a first side excitation assembly, and a second side excitation assembly, wherein: The loading assembly is arranged on the upper cover in a manner that it can slide back and forth in a direction parallel to the needle insertion direction, and the loading assembly and the outer needle seat are respectively provided with a first loading matching structure that cooperates to drive the outer needle seat to be elastically loaded into place when the loading assembly slides backward, and the loading assembly and the inner needle seat are respectively provided with a second loading matching structure that cooperates after the outer needle seat is loaded into place to drive the inner needle seat to be elastically loaded into place when the loading assembly slides backward; The first rear excitation component and the second rear excitation component are respectively installed at the rear ends in the needle insertion direction of the combined upper cover and the base, the first rear excitation component is provided with a first rear excitation button which can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited, and the second rear excitation component is provided with a second rear excitation button which can act on the outer needle seat to cause the outer needle seat to release the loading state and be excited, and can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited when the inner needle seat is not excited; The first side excitation component and the second side excitation component are respectively installed on one side of the combined upper cover and base in the needle insertion direction, the first side excitation component is provided with a first side excitation button which can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited, and the second side excitation component is provided with a second side excitation button which can act on the outer needle seat to cause the outer needle seat to release the loading state and be excited, and can act on the inner needle seat to cause the inner needle seat to release the loading state and be excited when the inner needle seat is not excited; The loading assembly further comprises a loading button, a loading seat and a first reset spring, wherein the loading seat is slidably mounted in a loading slide groove provided in the upper cover and extending in a direction parallel to the needle insertion direction, the loading button is fixedly connected to the loading seat and exposed outside the upper cover, and the first reset spring is arranged between the loading seat and the upper cover to cause the loading seat to reset after the loading seat slides backward along the loading slide groove; The first loading matching structure includes a loading rod extending downward from the front end of the loading seat and a loading boss convexly arranged on the outer needle seat, and the loading seat slides backward along the loading slide groove so that the loading rod and the loading boss abut against each other, thereby driving the outer needle seat to slide backward and load into place; The second loading cooperation structure includes two loading V-grooves arranged on both sides of the rear end of the loading seat and two tongues extending forward from the inner needle seat, a connecting rod is connected between the two tongues, and the outer needle seat is also provided with an action rod which is inserted between the two tongues of the inner needle seat after loading into place and pushes the connecting rod upward so that the two tongues are matched with the two loading V-grooves. The loading seat slides backward along the loading slide groove so that the two loading V-grooves and the two tongues of the inner needle seat are abutted against each other, thereby driving the inner needle seat to slide backward to load into place.

2. The biopsy needle according to claim 1, wherein On one side of the inner needle needle seat in the needle insertion direction, there is a first elastic piece extending obliquely forward in the needle insertion direction. An inner needle loading spring is arranged between the inner needle needle seat and the base. When the inner needle needle seat slides backward driven by the loading component until the front end of the first elastic piece abuts against the corresponding first loading limiting surface arranged in the base, the inner needle needle seat is loaded in place; on the corresponding side of the outer needle needle seat in the needle insertion direction, there is a second elastic piece extending obliquely forward in the needle insertion direction. An outer needle loading spring is arranged between the outer needle needle seat and the base. When the outer needle needle seat slides backward driven by the loading component until the front end of the second elastic piece abuts against the corresponding second loading limiting surface arranged in the base, the outer needle needle seat is loaded in place.

3. The biopsy needle according to claim 2, wherein, Both the first rear activation button and the second rear activation button are installed on the left and right sides at the rear end of the base in a manner that they can be pressed and elastically reset; the first rear activation button is provided with a first rear activation part extending towards the first elastic piece of the inner needle needle seat. When the first rear activation button is pressed, the first rear activation part pushes forward against the first elastic piece abutting against the first loading limiting surface to cause the first elastic piece to disengage from the first loading limiting surface and release the limit, so that the inner needle needle seat and the inner needle are activated under the action of the elastic force of the inner needle loading spring; the second rear activation button is provided with a second rear activation part extending towards the second elastic piece of the outer needle needle seat. When the second rear activation button is pressed, the second rear activation part pushes forward the first elastic piece of the inner needle needle seat that has not been activated and abuts against the first loading limiting surface to cause the first elastic piece to disengage from the first loading limiting surface and release the limit, so that the inner needle needle seat and the inner needle are activated under the action of the elastic force of the inner needle loading spring. When the second rear activation button is continuously pressed, the second rear activation part pushes forward the second elastic piece of the outer needle needle seat that abuts against the second loading limiting surface to cause the second elastic piece to disengage from the second loading limiting surface and release the limit, so that the outer needle needle seat and the outer needle are activated under the action of the elastic force of the outer needle loading spring.

4. The biopsy needle according to claim 3, wherein Both the first side activation button and the second side activation button are installed in the installation position formed on one side of the combined upper cover and the base in a manner that they can slide back and forth; the first side activation button is fixedly connected to the first rear activation part of the first rear activation button, and the second side activation button is fixedly connected to the second rear activation part of the second rear activation button.

5. The biopsy needle according to claim 3, wherein, The first side activation button and the second side activation button are both installed in the installation position formed on one side of the combined upper cover and base in a manner that they can be pressed and elastically reset; when the first side activation button is pressed, it pushes inward against the first elastic sheet contacting the first loading limiting surface to cause the first elastic sheet to disengage from the first loading limiting surface and release the limit, so that the inner needle seat and the inner needle are activated under the action of the elastic force of the inner needle loading spring; when the second side activation button is pressed, it pushes inward against the first elastic sheet contacting the first loading limiting surface of the inner needle seat that has not been activated yet to cause the first elastic sheet to disengage from the first loading limiting surface and release the limit, so that the inner needle seat and the inner needle are activated under the action of the elastic force of the inner needle loading spring. When the second side activation button is continuously pressed, it pushes inward against the second elastic sheet contacting the second loading limiting surface of the outer needle seat to cause the second elastic sheet to disengage from the second loading limiting surface and release the limit, so that the outer needle seat and the outer needle are activated under the action of the elastic force of the outer needle loading spring.

6. The biopsy needle according to claim 1, wherein The inner needle is fixedly arranged at the lower end of the inner needle seat, the outer needle is fixedly arranged at the lower end of the outer needle seat, and both the inner needle seat and the outer needle seat are limited in the internal space where the upper cover and the base are combined in the up, down, left, and right directions and can only move back and forth along the needle insertion direction.

7. The biopsy needle according to claim 1, wherein, A partition for separating the first rear activation button and the second rear activation button is further provided in the combined upper cover and base.

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