Biopsy needle with segmented firing control

Abstract

The application discloses a biopsy needle with segmented firing control and relates to the technical field of biopsy needles, which comprises an external shell, a mounting shell, a first mounting block, a second mounting block and a firing assembly. The mounting shell is arranged in the external shell, the mounting shell is provided with a containing cavity, the containing cavity is provided with a first elastic member and a second elastic member, the first mounting block is connected with a needle tube, the second mounting block is connected with a needle core, the needle core is arranged in the needle tube, the part of the needle core away from the external shell is provided with a sampling groove, the firing assembly is slidingly arranged between the external shell and the mounting shell, the firing assembly is used for triggering the second elastic member to push the second mounting block to move forward, and the first elastic member can be triggered to push the first mounting block to move forward when the second mounting block moves forward; and the first firing button and the second firing button are respectively used for driving the first mounting block and the second mounting block to move backward. The application can reduce the operation difficulty and improve the sampling success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of biopsy needles, in particular to a biopsy needle with segmented excitation control. Background Art

[0002] The full name of biopsy is "biopsy". It is a pathological examination technique that requires the use of professional equipment to take part of the diseased tissue for pathological biopsy. It provides a definite basis for formulating a treatment plan so that the clinician can take appropriate surgery or other treatment measures at an appropriate time. A disposable biopsy needle is a disposable biopsy instrument used to confirm tissue pathology. It is clinically used for biopsy of the liver, kidney, prostate, enlarged lymph nodes and various soft tissues. A disposable biopsy needle is a commonly used puncture biopsy device, including an outer needle tube and an inner needle rod. The tip of the inner needle rod has a sampling groove. The outer needle tube and the inner needle rod are inserted into the soft tissue after winding, and then the inner needle rod and the outer needle tube are fired. The inner needle rod moves a certain distance first, and then the outer needle tube moves again, so that a part of the soft tissue is cut. The disposable biopsy needle is then pulled back to take out the cut soft tissue for subsequent testing. Most of the biopsy needles in the existing technology have a relatively complex structure and are difficult to operate. Operators are prone to misoperation and sampling failure, mis-stimulation, and failure to obtain diseased tissue. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a biopsy needle with segmented excitation control, which can reduce the difficulty of operation and improve the success rate of sampling.

[0004] According to an embodiment of the first aspect of the present invention, a biopsy needle with segmented excitation control includes: an external shell, a mounting shell, a first mounting block, a second mounting block, and a firing assembly. The mounting shell is arranged in the external shell, and a accommodating chamber is provided in the mounting shell, and a first elastic member and a second elastic member are provided in the accommodating chamber; the first mounting block is slidably arranged in the accommodating chamber, and the first mounting block is connected to a needle tube extending out of the external shell; the second mounting block is slidably arranged in the accommodating chamber, and the second mounting block is connected to a needle core extending out of the external shell, the needle core is passed through the needle tube, and a sampling groove is provided on the part of the needle core away from the external shell; the firing assembly is slidably installed between the external shell and the mounting shell, and the firing assembly is used to trigger the second elastic member to push the second mounting block forward, and when the second mounting block moves forward, it can trigger the first elastic member to push the first mounting block forward; wherein, a first excitation button and a second excitation button are provided between the external shell and the mounting shell, and the first excitation button The button and the second excitation button are respectively used to drive the first mounting block and the second mounting block to move backward, the second mounting block includes a second connecting portion and a second sliding limiting portion, the second mounting block includes a second clip portion, the second clip portion is connected to the second sliding limiting portion, the side wall of the mounting shell is formed with a second bayonet for fixing the second clip portion, the firing assembly includes a sliding portion, a firing sliding groove is provided on the sliding portion, a firing slide is provided on the inner wall of the external shell, the firing slide extends into the firing sliding groove to limit the sliding portion, the sliding portion is provided with an oblique groove on the side close to the mounting shell, the oblique groove is aligned with the second clip portion in the front and rear directions, the second clip portion is composed of two second hooks arranged in parallel, the second hook is elastic, and the oblique groove is used to push the two second hooks close to each other so that the second clip portion is separated from the second bayonet.

[0005] A biopsy needle with segmented firing control according to an embodiment of the present invention has at least the following beneficial effects: the firing assembly pushes the second mounting block to unlock from its initial position, the second elastic member pushes the second mounting block forward, the second mounting block drives the needle core forward first, and after the needle core is fully extended, the second mounting block strikes the first mounting block to unlock from its initial position. The first mounting block, under the action of the first elastic member, moves forward, thereby driving the needle tube forward. This achieves the technical effect of automatically extending the needle core and needle tube in sequence for sampling.

[0006] According to some embodiments of the present invention, the first mounting block includes a first connecting portion and a first sliding limiting portion, sliding holes are provided on both sides of the mounting shell, the first sliding limiting portion extends into the sliding hole and can slide along the sliding hole, the first connecting portion is connected to the first sliding limiting portion, the first connecting portion is used to fix the needle tube, the side wall of the sliding hole is provided with an auxiliary sliding groove, and the first sliding limiting portion is connected to an auxiliary sliding block embedded in the auxiliary sliding groove.

[0007] According to some embodiments of the present invention, a first glue groove is opened in the first connecting part, the needle tube passes through the first glue groove in the first connecting part, an adhesive for fixing the needle tube is provided in the first glue groove, and a first solid glue block is provided on the side wall of the first glue groove.

[0008] According to some embodiments of the present invention, the first mounting block includes a first snap-on portion, which is connected to the first sliding limit portion. A first snap-on socket 221 for fixing the first snap-on portion is formed in the mounting shell. The first elastic member is sleeved on the outside of the first snap-on portion. The first elastic member is used to push the needle tube to move in the direction of extending out of the external shell, and the first excitation button is used to drive the needle tube to move in the direction of retracting into the external shell.

[0009] According to some embodiments of the present invention, the second sliding limit portion extends into the sliding hole and can slide along the sliding hole, the second connecting portion is connected to the second sliding limit portion, the second connecting portion is used to fix the needle core, a second glue groove is provided in the second connecting portion, the needle core passes through the second glue groove in the second connecting portion, and the second glue groove is provided with an adhesive for fixing the needle core.

[0010] According to some embodiments of the present invention, a second elastic member is sleeved on the outside of the second buckle portion, and the second elastic member is used to push the needle core to move in the direction of extending out of the external shell, and the second excitation button is used to drive the needle core to move in the direction of retracting into the external shell.

[0011] According to some embodiments of the present invention, the firing assembly includes a side button extending from the side of the external shell, the side button is connected to the sliding part through a side panel, and a rear button extending from the rear end of the external shell is provided at the rear end of the sliding part, and both the rear button and the side button can drive the sliding part to move forward and backward.

[0012] According to some embodiments of the present invention, reset parts are provided on both sides of the sliding part, and two blocking blocks are provided on the inner side of the external shell. The blocking blocks are against the corresponding reset parts, and the reset parts rely on their own elasticity to drive the sliding part to move backward.

[0013] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0015] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0016] Figure 2 This is an exploded schematic diagram of an embodiment of the present invention;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a schematic diagram of a first mounting block according to an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of a second mounting block according to an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of an installation housing according to an embodiment of the present invention;

[0021] Figure 7 This is an exploded schematic diagram of an installation housing according to an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of a first trigger button according to an embodiment of the present invention;

[0023] Figure 9 Schematic diagram of the second trigger button of an embodiment of the present invention

[0024] Figure 10 A schematic diagram of a firing assembly according to an embodiment of the present invention;

[0025] Figure 11 A schematic diagram of the upper half of an outer shell according to an embodiment of the present invention;

[0026] Figure 12 Schematic diagram of a needle core according to an embodiment of the present invention.

[0027] Figure Number:

[0028] External housing 100, upper housing 101, lower housing 102, firing slide 110, and blocking block 120;

[0029] Mounting housing 200, upper housing 201, lower housing 202, sliding hole 210, auxiliary slide groove 211, middle partition 220, first bayonet 221, accommodating cavity 230, first cavity 231, second cavity 232, second bayonet 240;

[0030] a first elastic member 300;

[0031] a second elastic member 400;

[0032] First mounting block 500, needle tube 501, first connecting portion 510, first adhesive groove 511, first adhesive fixing block 512, first sliding limiter 520, auxiliary slider 521, first trigger buckle 522, first buckle portion 530;

[0033] The second mounting block 600, the needle core 601, the sampling slot 602, the second connecting portion 610, the second sliding limit portion 620, the second excitation buckle 621, and the second buckle portion 630;

[0034] Firing assembly 700, sliding portion 710, firing sliding groove 711, inclined groove 712, reset portion 713, side button 720, side plate 730, rear button 740;

[0035] First excitation button 800, first excitation slot 810;

[0036] Second excitation button 900 and second excitation slot 910 . DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 12As shown, a biopsy needle with segmented excitation control according to one embodiment of the present invention comprises: an outer housing 100, a mounting housing 200, a first mounting block 500, a second mounting block 600, and a firing assembly 700. The outer housing 100 is composed of an upper outer housing 101 and a lower outer housing 102, which are connected by a snap-fit ​​connection. The mounting housing 200 is divided into an upper housing 201 and a lower housing 202. The upper housing 201 is provided with a plurality of insertion holes, and the lower housing 202 is provided with a plurality of insertion posts. The insertion posts are inserted into the corresponding insertion holes, and the insertion posts and the insertion holes are interference fit. The mounting housing 200 is connected to the outer housing 100 via a snap-fit ​​connection or bolts. A housing 230 is formed within the mounting housing 200. The housing 230 is divided into a first chamber 231 and a second chamber 232 by intermediate partitions 220 and 220. A first elastic member 300 and a second elastic member 400 are disposed within the housing 230. A first mounting block 500 is slidably disposed within the housing 230. Specifically, the first mounting block 500 is slidably disposed within the first chamber 231 and is movable along the direction in which the first chamber 231 extends. A needle tube 501 extending from the outer housing 100 is connected to the first mounting block 500. When the first mounting block 500 moves along the first chamber 231, it drives the needle tube 501 along the direction in which the needle tube 501 extends. A second mounting block 600 is slidably disposed within the housing 230. Specifically, the second mounting block 600 is slidably disposed within the second chamber 232 and is movable along the direction in which the second chamber 232 extends. The second mounting block 600 is connected to a needle core 601 extending out of the outer shell 100, and the needle core 601 is inserted into the needle tube 501. The movement direction of the first mounting block 500 is parallel to the movement direction of the second mounting block 600, so that when the second mounting block 600 drives the needle core 601 to move, the needle core 601 can move along the extension direction of the needle tube 501; a sampling groove 602 is provided on the part of the needle core 601 away from the outer shell 100; the firing assembly 700 is slidably installed between the outer shell 100 and the mounting shell 200, and the firing assembly 700 is used to trigger the second elastic member 400 to push the second mounting block 600 forward. When the second mounting block 600 moves forward, it can trigger the first elastic member 300 to push the first mounting block 500 forward; wherein, a first excitation button 800 and a second excitation button 900 are provided between the outer shell 100 and the mounting shell 200, and the first excitation button 800 and the second excitation button 900 are respectively used to drive the first mounting block 500 and the second mounting block 600 to move backward.During use, the operator pushes the firing assembly 700, which pushes the second mounting block 600 away from its fixed position. The second elastic member 400 pushes the second mounting block 600 forward, causing the second mounting block 600 to first extend the needle core 601 forward. After the needle core 601 is fully extended, the second mounting block 600 strikes the first mounting block 500. The first mounting block 500 moves forward under the action of the first elastic member 300, thereby extending the needle tube 501 forward. This achieves the technical effect of the needle core 601 and the needle tube 501 automatically extending in sequence.

[0042] Reference Figure 2 and 3 As shown, it can be understood that the first mounting block 500 includes a first connecting portion 510 and a first sliding stopper 520, and the first connecting portion 510 and the first sliding stopper 520 are integrally formed. The first sliding stopper 520 is C-shaped, and the first connecting portion 510 is located at the center of the C-shaped first sliding stopper 520. Sliding holes 210 are provided on the left and right sides of the mounting housing 200. The left and right sides of the first sliding stopper 520 extend into the corresponding sliding holes 210 and can slide along the sliding holes 210. The first connecting portion 510 is connected to the first sliding stopper 520, and the first connecting portion 510 is used to fix the needle tube 501. The needle tube 501 is made of metal, and the first sliding stopper 520 is usually made of a plastic with low friction, such as polytetrafluoroethylene, polyetheretherketone, or polyoxymethylene. The first connecting portion 510 is required to fix the needle tube 501 and the first sliding stopper 520 of different materials. Auxiliary slots 211 are provided on the sidewalls of the sliding hole 210, extending in the same direction as the sliding hole 210. The first sliding stopper 520 is connected to an auxiliary slider 521 that engages with the auxiliary slot 211. The auxiliary slider 521 cooperates with the auxiliary slot 211 to limit the first sliding stopper 520 in the left-right direction, preventing it from disengaging from the sliding hole 210. It is foreseeable that the sliding hole 210 is formed by the gap between the upper shell 201 and the lower shell 202 to facilitate the installation of the first mounting block 500 and the second mounting block 600.

[0043] Reference Figures 2 to 7As shown, it can be understood that a first adhesive groove 511 is provided in the first connecting portion 510, and the needle tube 501 passes through the first adhesive groove 511 in the first connecting portion 510. The first adhesive groove 511 is provided with an adhesive for fixing the needle tube 501. During assembly, the needle tube 501 is first passed through the first adhesive groove 511, and then the opening of the first adhesive groove 511 is kept upward. An adhesive such as epoxy resin, acrylic resin, or polyurethane is injected into the first adhesive groove 511, and the adhesive is allowed to cure. After the adhesive cures, the needle tube 501 is fixed in the first adhesive groove 511 under the action of the adhesive. A first adhesive solidifying block 512 is provided on the side wall of the first adhesive groove 511. The first adhesive solidifying block 512 increases the contact area between the adhesive and the first adhesive groove 511, which can effectively prevent the adhesive from separating from the side wall of the first adhesive groove 511 during use.

[0044] Reference Figures 2 to 7 As shown, it can be understood that the first mounting block 500 includes a first snap-fit ​​portion 530, which is connected to the first sliding stopper 520. The first snap-fit ​​portion 530 and the first sliding stopper 520 are integrally injection-molded. A first snap-fit ​​notch 221221 for securing the first snap-fit ​​portion 530 is formed within the mounting housing 200. The first snap-fit ​​notch 221221 is provided on the intermediate partition 220220. A first elastic member 300 is sleeved on the outer side of the first snap-fit ​​portion 530. The first elastic member 300 can be a metal spring or a non-metallic spring. The first elastic member 300 is used to push the needle tube 501 toward the direction of extending out of the outer housing 100, and the first trigger button 800 is used to drive the needle tube 501 toward the direction of retracting into the outer housing 100. The first excitation button 800 can push the first connection part 510 to compress the first elastic member 300 and make the first buckle part 530 embed into the first bayonet 221221. When the first buckle part 530 is disengaged from the first bayonet 221221 under the action of external force, the first elastic member 300 pushes the first connection part 510 to reset and moves the needle tube 501 in the direction of extending out of the external shell 100. A first excitation slot 810 is provided on the side of the first excitation button 800, and a first excitation buckle 522 is provided on the portion of the first sliding limit part 520 extending out of the sliding hole 210. The first excitation buckle 522 can be snapped into the first excitation slot 810. During installation, the operator only needs to press the first excitation buckle 522 into the first excitation slot 810 to connect the first excitation button 800 and the first mounting block 500. A plurality of first abutting portions are arranged around the side of the first connecting portion 510, and the outer peripheral walls of the plurality of first abutting portions are arranged in a circular shape. The outer peripheral walls of the first abutting portions abut against the first elastic member 300. The outer peripheral walls of the first abutting portions axially limit the first elastic member 300 to prevent the first elastic member 300 from shaking during compression and resetting, thereby making the first mounting block 500 move more smoothly.

[0045] Reference Figures 1 to 8As shown, it can be understood that the second mounting block 600 includes a second connecting portion 610 and a second sliding stopper 620, which are integrally formed. The second sliding stopper 620 is C-shaped, with the second connecting portion 610 located at the center of the C-shaped second sliding stopper 620. Sliding holes 210 are provided on the left and right sides of the mounting housing 200. The left and right sides of the second sliding stopper 620 extend into corresponding sliding holes 210 and can slide along the sliding holes 210. The second connecting portion 610 is connected to the second sliding stopper 620 and is used to secure the needle core 601. The needle core 601 is made of metal, while the second sliding stopper 620 is typically made of a low-friction plastic such as polytetrafluoroethylene, polyetheretherketone, or polyoxymethylene. The second connecting portion 610 is required to secure needle cores 601 and the second sliding stopper 620, which are made of different materials. A second glue groove 611 is provided in the second connecting portion 610, and the needle core 601 passes through the second glue groove 611 in the second connecting portion 610. The second glue groove 611 is provided with an adhesive for fixing the needle core 601. During assembly, the needle core 601 is first passed through the second glue groove 611, and then the opening of the second glue groove 611 is kept upward, and an adhesive such as epoxy resin, acrylic resin, or polyurethane is injected into the second glue groove 611. The adhesive is allowed to solidify and, after solidification, the needle core 601 is fixed in the second glue groove 611 under the action of the adhesive.

[0046] Reference Figures 4 to 9As shown, it can be understood that the second mounting block 600 includes a second latch portion 630, which is connected to the second sliding stop portion 620 and is integrally injection-molded with the second sliding stop portion 620. A second latch portion 240 is provided on the rear side of the mounting housing 200 for securing the second latch portion 630. The second latch portion 240 is provided on the intermediate partition 220220. A second elastic member 400 is sleeved on the outer side of the second latch portion 630. The second elastic member 400 can be a metal spring or a non-metallic spring. The second elastic member 400 is used to push the needle core 601 toward the direction of extending out of the outer housing 100, and the second trigger button 900 is used to drive the needle core 601 toward the direction of retracting into the outer housing 100. The second excitation button 900 can push the second connection part 610 to compress the second elastic member 400 and make the second buckle part 630 embed into the second bayonet 240. When the second buckle part 630 is disengaged from the second bayonet 240 under the action of external force, the second elastic member 400 pushes the second connection part 610 to reset and moves the needle core 601 in the direction of extending out of the external shell 100. A second excitation slot 910 is provided on the side of the second excitation button 900, and a second excitation buckle 621 is provided on the portion of the second sliding limit part 620 extending out of the sliding hole 210. The second excitation buckle 621 can be snapped into the second excitation slot 910. During installation, the operator only needs to press the second excitation buckle 621 forcefully into the second excitation slot 910 to connect the second excitation button 900 and the second mounting block 600. A plurality of second abutting portions are arranged around the side of the second connecting portion 610, and the outer peripheral walls of the plurality of second abutting portions are arranged in a circular shape. The outer peripheral walls of the second abutting portions abut against the second elastic member 400. The outer peripheral walls of the second abutting portions axially limit the second elastic member 400 to prevent the second elastic member 400 from shaking during compression and resetting, thereby making the second mounting block 600 move more smoothly.

[0047] It is foreseeable that, to reduce mold manufacturing costs, the structure of the first mounting block 500 is identical to that of the second mounting block 600 to achieve common components. During installation, the first sliding stopper 520 on the first mounting block 500 and the second sliding stopper 620 on the second mounting block 600 are respectively embedded in the sliding holes 210 on the left and right sides.

[0048] Reference Figures 6 to 11 As shown, it can be understood that the firing assembly 700 includes a sliding portion 710, and a firing sliding groove 711 extending along the front-to-back direction is provided on the sliding portion 710. A firing slider 110 is integrally formed on the inner wall of the external shell 100, and the firing slider 110 extends into the firing sliding groove 711 to limit the sliding portion 710, so that the sliding portion 710 can remain stable during the forward and backward movement, thereby improving the operating feel and the firing success rate.

[0049] Reference Figures 6 to 12As shown, it is understood that a V-shaped beveled groove 712 is defined on the side of the sliding portion 710 proximal to the mounting housing 200. Beveled groove 712 is aligned with the second mounting block 600 in the front-to-back direction and provides a guide for a portion of the second latching portion 630. The second latching portion 630 comprises two parallel, resilient second hooks. The beveled groove 712 is used to push the two second hooks toward each other, thereby separating the second latching portion 630 from the second latching opening 240. It is understood that the firing assembly 700 includes a side button 720 extending from the side of the outer housing 100. The side button 720 is connected to the sliding portion 710 via a side plate 730. The side button 720, side plate 730, and sliding portion 710 are integrally injection-molded. A rear button 740 is provided at the rear end of the sliding portion 710, extending from the rear end of the outer housing 100. The rear button 740 and the sliding portion 710 can be integrally injection-molded or glued. Both the rear button 740 and the side button 720 can drive the sliding portion 710 to move forward and backward. The operator can activate the second mounting block 600 by operating the side button 720 or by operating the rear button 740. The front end of the second mounting block 600 is provided with a collision bevel 712, which is V-shaped. When the second mounting block 600 moves to the front end under the drive of the second elastic member 400, the two first hooks of the first latch portion 530 are pushed closer to each other by the collision bevel 712, thereby separating the first latch portion 530 from the first latch opening 221221 under the action of the first elastic member 300.

[0050] It is foreseeable that a silicone buffer is provided at the front end of the second cavity 232, which can cushion the impact of the second mounting block 600 on the middle partition 220220, reduce noise and vibration, and improve the comfort of the biopsy needle during use.

[0051] Reference Figures 1 to 12 As shown, it is understood that the sliding portion 710 is provided with a reset portion 713 on both sides. The reset portion 713 and the sliding portion 710 are integrally injection molded. Since the reset portion 713 is made of plastic, the reset portion 713 itself has a certain degree of elasticity. Two blocking blocks 120 are provided on the inner side of the outer shell 100. The rear side of the blocking block 120 abuts against the front side of the corresponding reset portion 713. When the operator presses the sliding portion 710, the sliding portion 710 is pushed forward. The blocking block 120 blocks the forward movement of the reset portion 713 and causes the reset portion 713 to deform. When the operator releases the sliding portion 710, the reset portion 713 relies on its own elasticity to drive the sliding portion 710 to move backward and reset. The blocking block 120 and the firing slide 110 are both provided on the upper outer shell 101.

[0052] Usage steps: During use, the operator presses the first trigger button 800 to push the first connecting portion 510 to engage with the first bayonet 221221, and presses the second trigger button 900 to push the second connecting portion 610 to engage with the second bayonet 240. The needle core 601 and the needle tube 501 are then inserted into the human body part where sampling is required. The operator pushes the firing assembly 700, which pushes the second mounting block 600 to disengage from the second bayonet 240. The second elastic member 400 pushes the second mounting block 600 forward, and the second mounting block 600 drives the needle core 601 to extend forward. After the needle core 601 is fully extended, the second mounting block 600 hits the first mounting block 500 to leave the first bayonet 221221. The first mounting block 500 moves forward under the action of the first elastic member 300, thereby driving the needle tube 501 to extend forward, severing the connection between the tissue in the sampling groove 602 at the front end of the needle core 601 and other tissues. The needle core 601 and the needle tube 501 are automatically extended in sequence to perform sampling. The needle core 601 and the needle tube 501 are then removed from the tissue, and the tissue in the sampling groove 602 is removed from the human body. The first trigger button 800 is then pressed to push the first connecting portion 510 into engagement with the first latch 221221, causing the needle tube 501 to move backward, exposing the tissue in the sampling groove 602. The tissue is then transferred to a laboratory for examination.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A biopsy needle with segmented excitation control, characterized in that: include: outer housing (100); A mounting shell (200), the mounting shell (200) being disposed in the external shell (100), a receiving cavity (230) being disposed in the mounting shell (200), and a first elastic member (300) and a second elastic member (400) being disposed in the receiving cavity (230); a first mounting block (500) slidably disposed in the accommodating cavity (230), wherein the first mounting block (500) is connected to a needle tube (501) extending out of the outer shell (100); A second mounting block (600) is slidably disposed in the accommodating cavity (230), the second mounting block (600) being connected to a needle core (601) extending out of the outer shell (100), the needle core (601) being passed through the needle tube (501), and a sampling groove (602) being provided at a portion of the needle core (601) away from the outer shell (100); a firing assembly (700) slidably mounted between the outer shell (100) and the mounting shell (200), the firing assembly (700) being used to trigger the second elastic member (400) to push the second mounting block (600) forward, and the second mounting block (600) being able to trigger the first elastic member (300) to push the first mounting block (500) forward when the second mounting block (600) moves forward; Wherein, a first excitation button (800) and a second excitation button (900) are provided between the outer shell (100) and the mounting shell (200), the first excitation button (800) and the second excitation button (900) are respectively used to drive the first mounting block (500) and the second mounting block (600) to move backward, the second mounting block (600) includes a second connecting portion (610) and a second sliding limit portion (620), the second mounting block (600) includes a second buckle portion (630), the second buckle portion (630) is connected to the second sliding limit portion (620), the side wall of the mounting shell (200) is formed with a second bayonet (240) for fixing the second buckle portion (630), the firing assembly (700) ) includes a sliding portion (710), a firing sliding groove (711) is provided on the sliding portion (710), a firing slide block (110) is provided on the inner wall of the external shell (100), the firing slide block (110) extends into the firing sliding groove (711) to limit the sliding portion (710), and an inclined groove (712) is provided on the side of the sliding portion (710) close to the mounting shell (200), and the inclined groove (712) is aligned with the second buckle portion (630) in the front-to-back direction, and the second buckle portion (630) is composed of two second hooks arranged in parallel, and the second hooks are elastic. The inclined groove (712) is used to push the two second hooks closer to each other so that the second buckle portion (630) is separated from the second bayonet (240).

2. The biopsy needle with segmented excitation control according to claim 1, characterized in that: The first mounting block (500) includes a first connecting portion (510) and a first sliding limiting portion (520), sliding holes (210) are provided on both sides of the mounting shell (200), the first sliding limiting portion (520) extends into the sliding hole (210) and can slide along the sliding hole (210), the first connecting portion (510) is connected to the first sliding limiting portion (520), the first connecting portion (510) is used to fix the needle tube (501), the side wall of the sliding hole (210) is provided with an auxiliary sliding groove (211), and the first sliding limiting portion (520) is connected to an auxiliary sliding block (521) embedded in the auxiliary sliding groove (211).

3. The biopsy needle with segmented excitation control according to claim 2, characterized in that: A first glue groove (511) is provided in the first connecting portion (510), and the needle tube (501) passes through the first glue groove (511) in the first connecting portion (510). An adhesive for fixing the needle tube (501) is provided in the first glue groove (511), and a first glue block (512) is provided on a side wall of the first glue groove (511).

4. The biopsy needle with segmented excitation control according to claim 3, characterized in that: The first mounting block (500) includes a first snap-fit ​​portion (530), the first snap-fit ​​portion (530) is connected to the first sliding limit portion (520), a first snap-fit ​​socket 221 (221) for fixing the first snap-fit ​​portion (530) is formed in the mounting shell (200), the first elastic member (300) is sleeved on the outside of the first snap-fit ​​portion (530), the first elastic member (300) is used to push the needle tube (501) to move in the direction of extending out of the outer shell (100), and the first excitation button (800) is used to drive the needle tube (501) to move in the direction of retracting into the outer shell (100).

5. The biopsy needle with segmented excitation control according to claim 4, characterized in that: The second sliding limit portion (620) extends into the sliding hole (210) and can slide along the sliding hole (210), the second connecting portion (610) is connected to the second sliding limit portion (620), the second connecting portion (610) is used to fix the needle core (601), a second glue groove (611) is provided in the second connecting portion (610), the needle core (601) passes through the second glue groove (611) in the second connecting portion (610), and an adhesive for fixing the needle core (601) is provided in the second glue groove (611).

6. The biopsy needle with segmented excitation control according to claim 5, characterized in that: The second elastic member (400) is sleeved on the outside of the second buckle portion (630), and the second elastic member (400) is used to push the needle core (601) to move in a direction extending out of the external shell (100), and the second excitation button (900) is used to drive the needle core (601) to move in a direction retracting into the external shell (100).

7. The biopsy needle with segmented excitation control according to claim 6, characterized in that: The firing assembly (700) includes a side button (720) extending from the side of the external shell (100), the side button (720) is connected to the sliding portion (710) via a side plate (730), and a rear button (740) extending from the rear end of the external shell (100) is provided at the rear end of the sliding portion (710), and the rear button (740) and the side button (720) can both drive the sliding portion (710) to move forward and backward.

8. The biopsy needle with segmented excitation control according to claim 7, characterized in that: The sliding portion (710) is provided with a reset portion (713) on both the left and right sides. Two blocking blocks (120) are provided on the inner side of the external shell (100). The blocking blocks (120) abut against the corresponding reset portions (713). The reset portions (713) drive the sliding portion (710) to move backward by relying on their own elasticity.

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