Biopsy needle with segmented excitation control

Abstract

The invention discloses a biopsy needle with segmented excitation control, which relates to the technical field of biopsy needles and comprises an outer shell, a mounting shell, a first mounting block, a second mounting block and a percussion assembly. The mounting shell is arranged in the outer shell, a containing cavity is formed in the mounting shell, and a first elastic piece and a second elastic piece are arranged in the containing cavity; the first mounting block is connected with the needle tube; the second mounting block is connected with a needle core, the needle core penetrates through the needle tube, and a sampling groove is formed in the part, away from the outer shell, of the needle core; the percussion assembly is slidably mounted between the outer shell and the mounting shell, the percussion assembly is used for triggering the second elastic piece to push the second mounting block to move forwards, and when the second mounting block moves forwards, the first elastic piece can be triggered to push the first mounting block to move forwards; the first excitation button and the second excitation button are respectively used for driving the first mounting block and the second mounting block to move backwards. The operation difficulty can be reduced, and the sampling success rate is increased.

Description

Technical Field

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

[0002] The full name of biopsy is "biopsy", which is a pathological examination technique. It requires the use of professional equipment to take part of the diseased tissue for pathological biopsy, which provides a definite basis for formulating a treatment plan so that the clinical can take corresponding 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 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 as to cut a part of the soft tissue, and then pull back the disposable biopsy needle to take out the cut soft tissue for subsequent testing. Most of the biopsy needles in the prior art have a relatively complex structure and are difficult to operate. Operators are prone to misoperation of sampling, which may lead to failure to stimulate, 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 the first aspect of the present invention, a biopsy needle with segmented excitation control 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, and a receiving cavity is arranged in the mounting shell, and a first elastic member and a second elastic member are arranged in the receiving cavity; the first mounting block is slidably arranged in the receiving cavity, 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 receiving cavity, and the second mounting block is connected to a needle core extending out of the external shell, and the needle core is inserted into the needle tube, and a sampling groove is arranged 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 the second mounting block can trigger the first elastic member to push the first mounting block forward when it moves forward; wherein, a first excitation button and a second excitation button are arranged between the external shell and the mounting shell, and the first excitation button and the second excitation button are used to drive the first mounting block and the second mounting block to move backward respectively.

[0005] A biopsy needle with segmented excitation 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 the initial position, the second elastic member pushes the second mounting block to move forward, the second mounting block drives the needle core to extend forward first, after the needle core extends to the right position, the second mounting block hits the first mounting block to unlock from the initial position, the first mounting block moves forward under the action of the first elastic member, thereby driving the needle tube to extend forward. Thus, the technical effect of the needle core and the needle tube automatically extending in sequence for sampling is achieved.

[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, and a first snap-on slot 221 for fixing the first snap-on portion is formed in the mounting shell, and the first elastic member is sleeved on the outside of the first snap-on portion, and 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 mounting block includes a second connecting portion and a second sliding limiting portion, the second sliding limiting portion extends into the sliding hole and can slide along the sliding hole, the second connecting portion is connected to the second sliding limiting 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 an adhesive for fixing the needle core is provided in the second glue groove.

[0010] According to some embodiments of the present invention, the second mounting block includes a second snap-in portion, the second snap-in portion is connected to the second sliding limit portion, the side wall of the mounting shell is formed with a second snap-in slot for fixing the second snap-in portion, a second elastic member is sleeved on the outside of the second snap-in portion, the second elastic member is used to push the needle core to move in a direction extending out of the external shell, and the second excitation button is used to drive the needle core to move in a direction retracting into the external shell.

[0011] According to some embodiments of the present invention, the firing assembly includes a sliding portion, a firing sliding groove is provided on the sliding portion, a firing slide block is provided on the inner wall of the outer shell, and the firing slide block extends into the firing sliding groove to limit the sliding portion.

[0012] According to some embodiments of the present invention, an oblique groove is provided on a side of the sliding portion close to the mounting shell, and the oblique groove is aligned with the second buckle portion in the front-to-back direction. The second buckle portion is composed of two second hooks arranged in parallel, and the second hooks are elastic. The oblique groove is used to push the two second hooks closer to each other so that the second buckle portion is separated from the second buckle port.

[0013] According to some embodiments of the present invention, the firing assembly includes a side button extending out of the side of the external shell, the side button is connected to the sliding part through a side panel, and a rear button extending out of 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.

[0014] 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 abutted against the corresponding reset parts, and the reset parts drive the sliding part to move backward by their own elasticity.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is an overall schematic diagram of an embodiment of the present invention; Figure 2 An exploded schematic diagram of an embodiment of the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 A schematic diagram of a first installation block according to an embodiment of the present invention; Figure 5A schematic diagram of a second mounting block according to an embodiment of the present invention; Figure 6 A schematic diagram of an installation housing according to an embodiment of the present invention; Figure 7 An exploded schematic diagram of an installation housing according to an embodiment of the present invention; Figure 8 A schematic diagram of a first trigger button according to an embodiment of the present invention; Fig. 9 A schematic diagram of a second trigger button according to an embodiment of the present invention Fig.10 A schematic diagram of a firing assembly according to an embodiment of the present invention; Fig.11 A schematic diagram of the upper half of an external shell of an embodiment of the present invention; Fig.12 Schematic diagram of a needle core according to an embodiment of the present invention.

[0017] Figure Number: The outer shell 100, the upper outer shell 101, the lower outer shell 102, the firing slide 110, and the blocking block 120; Install the housing 200, the upper housing 201, the lower housing 202, the sliding hole 210, the auxiliary sliding groove 211, the middle partition 220, the first bayonet 221, the accommodating cavity 230, the first cavity 231, the second cavity 232, and the second bayonet 240; A first elastic member 300; A second elastic member 400; The first installation block 500, the needle tube 501, the first connecting portion 510, the first glue groove 511, the first glue solid block 512, the first sliding limiter 520, the auxiliary slider 521, the first excitation buckle 522, and the first buckle portion 530; 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; The firing assembly 700, the sliding portion 710, the firing sliding groove 711, the inclined groove 712, the reset portion 713, the side button 720, the side plate 730, and the rear button 740; A first excitation button 800 and a first excitation slot 810; Second excitation button 900 and second excitation slot 910 . DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the 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 should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood 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.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. 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.

[0022] Reference Figures 1 to 12As shown, a biopsy needle with segmented excitation control according to an embodiment of the present invention comprises: an external shell 100, a mounting shell 200, a first mounting block 500, a second mounting block 600, and a firing assembly 700. The external shell 100 is composed of an upper shell 101 and a lower shell 102, and the upper shell 101 and the lower shell 102 are connected by a buckle. The mounting shell 200 is divided into an upper shell 201 and a lower shell 202, and the upper shell 201 is provided with a plurality of plug-in holes, and the lower shell 202 is provided with a plurality of plug-in columns, which are embedded in the corresponding plug-in holes, and the plug-in columns and the plug-in holes are interference fit. The mounting shell 200 is connected to the outer shell 100 by snap connection or bolts. A housing cavity 230 is formed in the mounting shell 200. The housing cavity 230 is divided into a first cavity 231 and a second cavity 232 by a middle partition 220220. The housing cavity 230 is provided with a first elastic member 300 and a second elastic member 400. The first mounting block 500 is slidably disposed in the housing cavity 230. Specifically, the first mounting block 500 is slidably disposed in the first cavity 231. The first mounting block 500 is movable along the extension direction of the first cavity 231. The first mounting block 500 is connected to a needle tube 501 extending out of the outer shell 100. When the first mounting block 500 moves along the first cavity 231, the first mounting block 500 can drive the needle tube 501 to move along the extension direction of the needle tube 501. The second mounting block 600 is slidably disposed in the housing cavity 230. Specifically, the second mounting block 600 is slidably disposed in the second cavity 232. The second mounting block 600 is movable along the extension direction of the second cavity 232. The second mounting block 600 is connected to a needle core 601 extending out of the external 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; the part of the needle core 601 away from the external shell 100 is provided with a sampling groove 602; the firing assembly 700 is slidably installed between the external 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 external 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.When in use, the operator pushes the firing assembly 700, and the firing assembly 700 pushes the second mounting block 600 to disengage from the fixed position, and the second elastic member 400 pushes the second mounting block 600 to move forward, and the second mounting block 600 drives the needle core 601 to extend forward first, and after the needle core 601 extends to the right position, the second mounting block 600 hits the first mounting block 500, and 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. Thus, the technical effect of the needle core 601 and the needle tube 501 automatically extending in sequence is achieved.

[0023] 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. The left and right sides of the mounting housing 200 are provided with sliding holes 210, and the left and right sides of the first sliding stopper 520 extend into the corresponding sliding holes 210 respectively 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 plastic with low friction such as polytetrafluoroethylene, polyetheretherketone, polyoxymethylene, etc. The needle tube 501 and the first sliding stopper 520 of different materials need to be fixed through the first connecting portion 510. The side wall of the sliding hole 210 is provided with an auxiliary slide groove 211, and the extension direction of the auxiliary slide groove 211 is the same as the extension direction of the sliding hole 210. The first sliding limiter 520 is connected with an auxiliary slider 521 embedded in the auxiliary slide groove 211, and the auxiliary slider 521 cooperates with the auxiliary slide groove 211 to limit the first sliding limiter 520 in the left and right directions to prevent the first sliding limiter 520 from being separated from the sliding hole 210. It can be foreseen that the sliding hole 210 is formed by the gap between the upper shell 201 and the lower shell 202, so as to facilitate the installation of the first mounting block 500 and the second mounting block 600.

[0024] Reference Figures 2 to 7As shown, it can be understood that a first adhesive groove 511 is provided in the first connection part 510, and the needle tube 501 passes through the first adhesive groove 511 in the first connection part 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, and an adhesive such as epoxy resin, acrylic resin, polyurethane, etc. is injected into the first adhesive groove 511, and the adhesive is waited for to be cured. After the adhesive is cured, the needle tube 501 is fixed in the first adhesive groove 511 under the action of the adhesive. A first solid adhesive block 512 is provided on the side wall of the first adhesive groove 511. The first solid adhesive block 512 increases the contact area between the adhesive and the first adhesive groove 511, and can effectively prevent the adhesive from separating from the side wall of the first adhesive groove 511 during use.

[0025] Reference Figures 2 to 7 As shown, it can be understood that the first mounting block 500 includes a first buckle portion 530, the first buckle portion 530 is connected to the first sliding limit portion 520, and the first buckle portion 530 and the first sliding limit portion 520 are integrally injection molded. A first bayonet 221221 for fixing the first buckle portion 530 is formed in the mounting housing 200, and the first bayonet 221221 is opened on the middle partition 220220, and a first elastic member 300 is sleeved on the outer side of the first buckle portion 530, and the first elastic member 300 is selected from a metal spring or a non-metallic spring. The first elastic member 300 is used to push the needle tube 501 to move in the direction of extending out of the outer housing 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 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 part 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, and 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.

[0026] 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, and the second connecting portion 610 and the second sliding stopper 620 are integrally formed. The second sliding stopper 620 is C-shaped, and the second connecting portion 610 is located at the center of the C-shaped second sliding stopper 620. The left and right sides of the mounting housing 200 are provided with sliding holes 210, and the left and right sides of the second sliding stopper 620 extend into the corresponding sliding holes 210 respectively and can slide along the sliding holes 210. The second connecting portion 610 is connected to the second sliding stopper 620, and the second connecting portion 610 is used to fix the needle core 601. The needle core 601 is made of metal, and the second sliding stopper 620 is usually made of plastic with low friction such as polytetrafluoroethylene, polyetheretherketone, polyoxymethylene, etc. The needle core 601 and the second sliding stopper 620 of different materials need to be fixed through the second connecting portion 610. 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, polyurethane, etc. is injected into the second glue groove 611, and the adhesive is waited for to solidify. After the adhesive is solidified, the needle core 601 is fixed in the second glue groove 611 under the action of the adhesive.

[0027] Reference Figures 4 to 9As shown, it can be understood that 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, and the second buckle portion 630 and the second sliding limit portion 620 are integrally injection molded. A second bayonet 240 for fixing the second buckle portion 630 is provided at the rear side of the mounting housing 200, and the second bayonet 240 is provided on the middle partition 220220, and a second elastic member 400 is sleeved on the outer side of the second buckle portion 630, and the second elastic member 400 is selected from a metal spring or a non-metallic spring. The second elastic member 400 is used to push the needle core 601 to move in the direction of extending out of the external housing 100, and the second excitation button 900 is used to drive the needle core 601 to move in the direction of retracting into the external 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 makes the needle core 601 move 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 part 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 into the second excitation slot 910 to connect the second excitation button 900 with 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, and 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 allowing the second mounting block 600 to move more smoothly.

[0028] It is foreseeable that, in order to reduce the mold making cost of manufacturing, the structure of the first mounting block 500 is the same as that of the second mounting block 600 to achieve commonality of parts. 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.

[0029] 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 slide block 110 is integrally formed on the inner wall of the outer shell 100. The firing slide block 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.

[0030] Reference Figures 6 to 12As shown, it can be understood that a side of the sliding part 710 close to the mounting shell 200 is provided with an oblique groove 712, which is V-shaped, and is aligned with the second mounting block 600 in the front-to-back direction, and the oblique groove 712 is provided for partial embedding and guidance of the second buckle part 630. The second buckle part 630 is composed of two second hooks arranged in parallel, and the second hooks are elastic, and the oblique groove 712 is used to push the two second hooks to approach each other so that the second buckle part 630 is separated from the second bayonet 240. It can be understood that the firing assembly 700 includes a side button 720 extending from the side of the external shell 100, and the side button 720 is connected to the sliding part 710 through the side plate 730, and the side button 720, the side plate 730 and the sliding part 710 are integrally injection molded. A rear button 740 extending from the rear end of the external shell 100 is provided at the rear end of the sliding part 710, and the rear button 740 and the sliding part 710 can be integrally injection molded or bonded by glue. Both the rear button 740 and the side button 720 can drive the sliding part 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 at the rear end. The front end of the second mounting block 600 is provided with an impact bevel 712, which is V-shaped. When the second mounting block 600 moves to the front end driven by the second elastic member 400, the two first hooks of the first buckle part 530 are pushed close to each other by the impact bevel 712, so that the first buckle part 530 is separated from the first bayonet 221221 under the action of the first elastic member 300.

[0031] It is foreseeable that a silicone buffer is provided at the front end of the second cavity 232, and the silicone buffer can buffer the impact force of the second mounting block 600 on the middle partition 220220, reduce noise and vibration, and improve the comfort of the biopsy needle when in use.

[0032] Reference Figures 1 to 12 As shown, it can be understood that the left and right sides of the sliding part 710 are provided with a reset part 713, and the reset part 713 and the sliding part 710 are integrally injection molded. Since the reset part 713 is made of plastic material, the reset part 713 itself has a certain elasticity. Two blocking blocks 120 are arranged on the inner side of the external shell 100, and the rear side of the blocking block 120 is against the front side of the corresponding reset part 713. When the operator presses the sliding part 710, when the sliding part 710 is pushed forward, the blocking block 120 blocks the reset part 713 from moving forward and deforms the reset part 713. After the operator releases the sliding part 710, the reset part 713 relies on its own elasticity to drive the sliding part 710 to move backward and reset. The blocking block 120 and the firing slide 110 are both arranged on the upper outer shell 101.

[0033] Usage steps: When in use, the operator presses the first excitation button 800 to push the first connection part 510 to engage with the first bayonet 221221, and presses the second excitation button 900 to push the second connection part 610 to engage with the second bayonet 240. Then the needle core 601 and the needle tube 501 are inserted into the human body part where sampling is required, and the operator pushes the firing assembly 700, and the firing assembly 700 pushes the second mounting block 600 to disengage from the second bayonet 240, and the second elastic member 400 pushes the second mounting block 600 to move forward, and the second mounting block 600 drives the needle core 601 to extend forward first, and after the needle core 601 extends to the right position, the second mounting block 600 hits the first mounting block 500 to leave the first bayonet 221221, and 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, and cutting off the connection between the tissue in the sampling slot 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 successively for sampling. Then the needle core 601 and the needle tube 501 are taken out of the tissue, and the tissue in the sampling slot 602 is taken out of the human body. Then the first excitation button 800 is pressed to push the first connection part 510 to engage with the first bayonet 221221, so that the needle tube 501 moves backwards, exposing the tissue in the sampling slot 602, and then the tissue is transferred to the laboratory for inspection.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A biopsy needle with segmented excitation control, characterized in that: include: An outer housing (100); An installation shell (200), the installation shell (200) being arranged in the external shell (100), the installation shell (200) being provided with a receiving cavity (230), and the receiving cavity (230) being provided with a first elastic member (300) and a second elastic member (400); A first mounting block (500) is slidably disposed in the accommodating cavity (230), wherein the first mounting block (500) is connected to a needle tube (501) extending out of the external housing (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 inserted through the needle tube (501), and a sampling groove (602) being disposed 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 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 arranged between the external shell (100) and the installation shell (200), and the first excitation button (800) and the second excitation button (900) are respectively used to drive the first installation block (500) and the second installation block (600) to move backward.

2. The biopsy needle with segmented excitation control according to claim 1, characterized in that: The first mounting block (500) comprises 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); an auxiliary sliding groove (211) is provided on the side wall of the sliding hole (210); 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 external 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 external shell (100).

5. The biopsy needle with segmented excitation control according to claim 4, characterized in that: The second mounting block (600) comprises a second connecting portion (610) and a second sliding limiting portion (620), wherein the second sliding limiting portion (620) extends into the sliding hole (210) and can slide along the sliding hole (210), wherein the second connecting portion (610) is connected to the second sliding limiting portion (620), wherein the second connecting portion (610) is used to fix the needle core (601), wherein a second adhesive groove (611) is provided in the second connecting portion (610), wherein the needle core (601) passes through the second adhesive groove (611) in the second connecting portion (610), and wherein an adhesive for fixing the needle core (601) is provided in the second adhesive groove (611).

6. The biopsy needle with segmented excitation control according to claim 5, characterized in that: The second mounting block (600) includes a second snap-fit ​​portion (630), the second snap-fit ​​portion (630) is connected to the second sliding limit portion (620), the side wall of the mounting shell (200) is formed with a second snap-fit ​​port (240) for fixing the second snap-fit ​​portion (630), the second elastic member (400) is sleeved on the outside of the second snap-fit ​​portion (630), the second elastic member (400) is used to push the needle core (601) to move in the direction of extending out of the external shell (100), and the second excitation button (900) is used to drive the needle core (601) to move in the direction of 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) comprises a sliding portion (710), the sliding portion (710) being provided with a firing sliding groove (711), the inner wall of the external shell (100) being provided with a firing slide block (110), the firing slide block (110) extending into the firing sliding groove (711) to limit the sliding portion (710).

8. The biopsy needle with segmented excitation control according to claim 7, characterized in that: The sliding portion (710) is provided with an oblique groove (712) on one side close to the mounting shell (200), and the oblique groove (712) is aligned with the second buckle portion (630) in the front-to-back direction. The second buckle portion (630) is composed of two second hooks arranged in parallel, and the second hooks are elastic. The oblique groove (712) is used to push the two second hooks closer to each other so as to separate the second buckle portion (630) from the second bayonet (240).

9. The biopsy needle with segmented excitation control according to claim 8, characterized in that: The firing assembly (700) comprises a side button (720) extending out of the side of the external shell (100); the side button (720) is connected to the sliding portion (710) via a side plate (730); a rear button (740) extending out of the rear end of the external shell (100) is provided at the rear end of the sliding portion (710); the rear button (740) and the side button (720) can both drive the sliding portion (710) to move forward and backward.

10. The biopsy needle with segmented excitation control according to claim 9, characterized in that: The sliding portion (710) is provided with a reset portion (713) on both left and right sides, and 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), and the reset portions (713) drive the sliding portion (710) to move backwards by relying on their own elasticity.

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