Sectional excitation control device for biopsy needle

Abstract

The utility model discloses a sectional excitation control device for a biopsy needle, 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, a first elastic piece, a second elastic piece and a percussion component. The mounting shell is arranged in the outer shell, a containing cavity is formed in the mounting shell, a first clamping opening is formed in the middle partition plate, and a second clamping opening is formed in the second cavity; the first mounting block is connected with a needle tube, and the first mounting block is clamped in the first bayonet; the second mounting block is connected with a needle core, and the needle core penetrates through the needle tube; the first elastic piece is used for driving the first mounting block to get away from the first bayonet; the second elastic piece is used for driving the second mounting block to leave the second bayonet, and the second mounting block can push the first mounting block to leave the first bayonet; the percussion assembly is slidably mounted between the outer shell and the mounting shell and used for pushing the second mounting block to be separated from the second bayonet. The technical effect that the needle core and the needle tube automatically extend out in sequence can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to biopsy needle technical field, especially a biopsy needle sectional type excitation control device. BACKGROUND

[0002] The full name of biopsy is "biopsy", which is a pathological examination technique, and part of the pathological tissue is taken by professional device for pathological biopsy, so that the treatment plan is determined to have a definite basis, so that the corresponding operation or other treatment measures are taken in clinical period selection. The advantage of biopsy is: less trauma, can reduce the pain of patients, and low recovery cycle, low operation difficulty. Disposable biopsy needle is a kind of disposable biopsy instrument, which is used for confirming tissue pathology and is used for liver, kidney, prostate, enlarged lymph nodes and biopsy of various soft tissues in clinic. Disposable biopsy needle is the common puncture biopsy equipment at present, including outer needle tube and inner needle rod, the tip of the inner needle rod is provided with a sampling groove, the outer needle tube and the inner needle rod are inserted into soft tissue after the upper chord, then the inner needle rod and the outer needle tube are fired, the inner needle rod moves a certain distance first, then the outer needle tube moves again, a part of soft tissue is cut, then the disposable biopsy needle is pulled back, the cut soft tissue is taken out and used for subsequent detection. The biopsy needle in the prior art has complex structure, the activities of needle core and needle tube need to be controlled respectively to realize sampling, the operation is complicated, and the operator is prone to misoperation, sampling cannot be excited, misexcitation and pathological tissue cannot be taken. UTILITY MODEL CONTENT

[0003] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides a biopsy needle sectional type excitation control device, which can realize the technical effect that the needle core and the needle tube are automatically stretched out.

[0004] According to the biopsy needle segmented type trigger control device of the utility model, the first installation block is driven to move away from the first clamping hole by the first elastic element, the second installation block is driven to move forward by the second elastic element, the second installation block drives the needle core to first stretch out, the needle core stretches out to the position, the second installation block hits the first installation block to leave the first clamping hole, the first installation block is driven to move forward under the action of the first elastic element, thereby driving the needle tube to stretch out.

[0005] According to the biopsy needle segmented type trigger control device of the utility model, at least has following beneficial effect: the second installation block is driven to move away from the second clamping hole by the trigger assembly, the second installation block is driven to move forward by the second elastic element, the second installation block drives the needle core to first stretch out, the needle core stretches out to the position, the second installation block hits the first installation block to leave the first clamping hole, the first installation block is driven to move forward under the action of the first elastic element, thereby driving the needle tube to stretch out.

[0006] According to some embodiments of the utility model, the trigger assembly includes a sliding part, the sliding part is provided with a trigger sliding groove, the inner wall of the outer shell is provided with a trigger sliding block, the trigger sliding block extends into the trigger sliding groove to limit the sliding part.

[0007] According to some embodiments of the utility model, the side of the sliding part close to the installation shell is provided with an inclined groove in the front and rear direction, the inclined groove is aligned with the second installation block, and the inclined groove is used to drive the second installation block to separate from the second clamping hole.

[0008] According to some embodiments of the utility model, the trigger assembly includes a side button extending from the side of the outer shell, the side button is connected with the sliding part through a side plate, the rear end of the sliding part is provided with a rear button extending from the rear end of the outer shell, and the rear button and the side button can drive the sliding part to move forward and backward.

[0009] According to some embodiments of the present application, the left and right sides of the sliding part are provided with reset parts, the inner side of the outer shell is provided with two blocking blocks, the blocking blocks abut against the corresponding reset parts, and the reset parts drive the sliding part to move backward by relying on their own elasticity.

[0010] According to some embodiments of the present application, the first mounting block comprises a first connecting part and a first sliding limiting part, the both sides of the mounting shell are provided with sliding holes, the first sliding limiting part extends into the sliding hole and can slide along the sliding hole, the first connecting part is connected with the first sliding limiting part, and the first connecting part is used for fixing the needle tube.

[0011] According to some embodiments of the present application, the first mounting block comprises a first clamping part, the first clamping part is connected with the first sliding limiting part, the first clamping part can be clamped in the first clamping hole, the first elastic member is sleeved outside the first clamping part, and the first elastic member is used for pushing the needle tube to move towards the direction of extending out of the outer shell.

[0012] According to some embodiments of the present application, the second mounting block comprises a second connecting part and a second sliding limiting part, the second sliding limiting part extends into the sliding hole and can slide along the sliding hole, the second connecting part is connected with the second sliding limiting part, and the second connecting part is used for fixing the needle tube.

[0013] According to some embodiments of the present application, the second mounting block comprises a second clamping part, the second clamping part is connected with the second sliding limiting part, the second clamping part can be clamped in the second clamping hole, the second elastic member is sleeved outside the second clamping part, and the second elastic member is used for pushing the needle tube to move towards the direction of extending out of the outer shell.

[0014] According to some embodiments of the present application, the first and second trigger buttons are arranged to slide between the outer shell and the mounting shell, the first trigger button is used for pushing the first connecting part to be clamped in the first clamping hole, and the second trigger button is used for pushing the second connecting part to be clamped in the second clamping hole.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings and embodiments, in which:

[0017] Figure 1 It is an overall schematic view of one embodiment of the present application.

[0018] Figure 2 This is an exploded view of one embodiment of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the first mounting block according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the second mounting block according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the mounting housing according to one embodiment of the present invention;

[0023] Figure 7 This is an exploded view of the mounting housing according to one embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the first trigger button according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the second trigger button according to an embodiment of the present invention.

[0026] Figure 10 This is a schematic diagram of a firing assembly according to an embodiment of the present invention;

[0027] Figure 11 This is a schematic diagram of the upper half of the outer shell of one embodiment of the present invention.

[0028] Icon labels:

[0029] Outer housing 100, firing slider 110, blocking block 120;

[0030] Mounting housing 200, upper housing 201, lower housing 202, receiving cavity 210, first cavity 211, second cavity 212, second bayonet 213, middle partition 220, first bayonet 221, sliding hole 230;

[0031] First mounting block 300, first connecting part 310, first sliding limiting part 320, first buckling part 330;

[0032] Syringe 400, first trigger button 410, second trigger button 420;

[0033] Second mounting block 500, second connecting part 510, second sliding limiting part 520, second buckling part 530;

[0034] Needle core 600;

[0035] First elastic element 700;

[0036] Second elastic element 800;

[0037] The firing assembly 900, the sliding part 910, the firing sliding groove 911, the inclined groove 912, the reset part 913, the side button 920, the side plate 930, and the rear button 940. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0041] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0042] Reference Figures 1 to 11As shown, an embodiment of the present invention discloses a segmented excitation control device for a biopsy needle, comprising: an outer housing 100, a mounting housing 200, a first mounting block 300, a second mounting block 500, a first elastic element 700, a second elastic element 800, and a firing assembly 900. The outer housing 100 is made of plastic materials such as polyethylene or acrylonitrile-butadiene-styrene polymer. Both the mounting housing 200 and the outer housing 100 are injection molded from plastic materials. The mounting housing 200 is divided into an upper housing 201 and a lower housing 202. The upper housing 201 is provided with multiple insertion holes, and the lower housing 202 is provided with multiple insertion posts. The insertion posts are embedded in corresponding insertion holes, and the insertion posts and insertion holes are interference-fitted. The mounting housing 200 is disposed within the outer housing 100 and is connected to the outer housing 100 by snap-fit ​​or bolts. The mounting housing 200 contains a receiving cavity 210, which is divided into a first cavity 211 and a second cavity 212 by a middle partition 220. A first latch 221 is provided on the middle partition 220, and a second latch 213 is provided on the side wall of the second cavity 212 away from the first cavity 211. A first mounting block 300 is slidably disposed in the first cavity 211 and is movable along the extension direction of the first cavity 211. A needle tube 400, which is a hollow metal tube, is connected to the first mounting block 300 and extends out of the outer housing 100. When the first mounting block 300 moves along the first cavity 211, it drives the needle tube 400 to move along its extension direction. The first mounting block 300 can be engaged with the first bayonet 221; the second mounting block 500 is slidably disposed in the second cavity 212, and the second mounting block 500 can move along the extending direction of the second cavity 212. The second mounting block 500 is connected to a needle core 600 extending out of the outer housing 100, and the needle core 600 passes through the needle tube 400. The movement direction of the first mounting block 300 is parallel to the movement direction of the second mounting block 500, and when the second mounting block 500 drives the needle core 600 to move, the needle core 600 can move along the extending direction of the needle tube 400. The first elastic element 700 is disposed in the first cavity 211. One end of the first elastic element 700 abuts against the first mounting block 300, and the other end abuts against the intermediate partition 220. The first elastic element 700 is used to drive the first mounting block 300 away from the first bayonet 221 of the intermediate partition 220. The second elastic element 800 is disposed in the second cavity 212. One end of the second elastic element 800 abuts against the second mounting block 500, and the other end abuts against the inner wall of the rear side of the mounting housing 200. The second elastic element 800 is used to drive the second mounting block 500 away from the second bayonet 213. During the process of pushing the second mounting block 500, the second mounting block 500 can collide with the first mounting block 300 and leave the first bayonet 221. The firing assembly 900 is slidably mounted between the outer housing 100 and the mounting housing 200. The firing assembly 900 is used to push the second mounting block 500 away from the second bayonet 213.In use, the operator pushes the firing assembly 900, which pushes the second mounting block 500 out of the second latch 213. The second elastic element 800 pushes the second mounting block 500 forward, causing the needle core 600 to extend forward first. After the needle core 600 extends to its position, the second mounting block 500 impacts the first mounting block 300 and leaves the first latch 221. The first mounting block 300 moves forward under the action of the first elastic element 700, thereby causing the needle tube 400 to extend forward. This achieves the technical effect of automatic sequential extension of the needle core 600 and the needle tube 400.

[0043] Reference Figure 10 As shown, it can be understood that the firing assembly 900 is made of plastic materials such as polyethylene, acrylonitrile-butadiene-styrene polymer. The firing assembly 900 includes a sliding part 910, on which a firing sliding groove 911 extending in the front-back direction is provided. A firing slider 110 is integrally formed on the inner wall of the outer housing 100. The firing slider 110 extends into the firing sliding groove 911 to limit the sliding part 910, so that the sliding part 910 can remain stable during the front-back movement, improving the operating feel and firing success rate.

[0044] Reference Figure 10 As shown, it can be understood that the sliding part 910 has a V-shaped groove 912 on the side near the mounting housing 200. The groove 912 is aligned with the second mounting block 500 in the front-rear direction. The groove 912 is used to insert and guide the part of the second mounting block 500 that extends out of the mounting housing 200. The groove 912 is used to push the part of the second mounting block 500 that extends out of the mounting housing 200 forward until it separates from the second bayonet 213.

[0045] Reference Figure 10 As shown, the firing assembly 900 includes a side button 920 extending from the side of the outer housing 100. The side button 920 is connected to the sliding part 910 via a side plate 930. The side button 920, side plate 930, and sliding part 910 are integrally injection molded. A rear button 940 extending from the rear end of the sliding part 910 is provided. The rear button 940 and sliding part 910 can be integrally injection molded or bonded together with adhesive. Both the rear button 940 and the side button 920 can drive the sliding part 910 to move back and forth. The operator can activate the second mounting block 500 by operating the side button 920 or the rear button 940.

[0046] Reference Figure 10 and Figure 11As shown, it can be understood that reset parts 913 are provided on both the left and right sides of the sliding part 910. The reset parts 913 and the sliding part 910 are integrally injection molded. Since the reset parts 913 are made of plastic, they have 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 part 913. When the operator presses the sliding part 910, the blocking block 120 prevents the reset part 913 from moving forward and deforms the reset part 913. After the operator releases the sliding part 910, the reset part 913 drives the sliding part 910 to move backward and reset itself by its own elasticity.

[0047] Reference Figure 1 and Figure 11 As shown, the first mounting block 300 includes a first connecting portion 310 and a first sliding limiting portion 320, which are integrally formed. The first sliding limiting portion 320 is C-shaped, and the first connecting portion 310 is located at the center of the C-shaped first sliding limiting portion 320. Sliding holes 230 are provided on both sides of the mounting housing 200. The left and right sides of the first sliding limiting portion 320 extend into the corresponding sliding holes 230 and can slide along the sliding holes 230. The first connecting portion 310 is connected to the first sliding limiting portion 320 and is used to fix the needle tube 400. The needle tube 400 is made of metal, while the first sliding limiting portion 320 is typically made of low-friction plastics such as polytetrafluoroethylene, polyetheretherketone, or polyoxymethylene. The first connecting portion 310 is needed to fix the needle tube 400 and the first sliding limiting portion 320, which are made of different materials.

[0048] Reference Figure 1 and Figure 11 As shown, the first mounting block 300 includes a first latching portion 330, which is connected to a first sliding limiting portion 320. The first latching portion 330 and the first sliding limiting portion 320 are integrally injection molded. A first elastic member 700 is sleeved on the outside of the first latching portion 330. The first elastic member 700 can be a metal spring or a non-metallic spring. The first elastic member 700 is used to push the needle tube 400 to move in the direction of extending out of the outer housing 100, and the first trigger button 410 is used to drive the needle tube 400 to move in the direction of retracting into the outer housing 100. The first trigger button 410 can push the first connecting portion 310 to compress the first elastic member 700 and make the first latching portion 330 engage with the first bayonet 221. When the first latching portion 330 disengages from the first bayonet 221 under the action of external force, the first elastic member 700 pushes the first connecting portion 310 to reset and makes the needle tube 400 move in the direction of extending out of the outer housing 100.

[0049] Reference Figure 1 and Figure 11As shown, the second mounting block 500 includes a second connecting portion 510 and a second sliding limiting portion 520, which are integrally formed. The second sliding limiting portion 520 is C-shaped, and the second connecting portion 510 is located at the center of the C-shaped second sliding limiting portion 520. Sliding holes 230 are provided on both sides of the mounting housing 200, and the left and right sides of the second sliding limiting portion 520 extend into the corresponding sliding holes 230 and can slide along the sliding holes 230. The second connecting portion 510 is connected to the second sliding limiting portion 520 and is used to fix the needle core 600. The needle core 600 is made of metal, while the second sliding limiting portion 520 is typically made of low-friction plastics such as polytetrafluoroethylene, polyetheretherketone, or polyoxymethylene. The second connecting portion 510 is needed to fix needle cores 600 and second sliding limiting portions 520 made of different materials.

[0050] Reference Figure 1 and Figure 11 As shown, the second mounting block 500 includes a second latching portion 530, which is connected to the second sliding limiting portion 520. The second latching portion 530 and the second sliding limiting portion 520 are integrally injection molded. A second latch 213 is formed on the intermediate partition 220. A second elastic member 800 is sleeved on the outside of the second latching portion 530. The second elastic member 800 can be a metal spring or a non-metal spring. The second elastic member 800 is used to push the needle core 600 to move in the direction of extending out of the outer housing 100, and the second trigger button 420 is used to drive the needle core 600 to move in the direction of retracting into the outer housing 100. The second trigger button 420 can push the second connecting part 510 to compress the second elastic member 800 and make the second latching part 530 insert into the second bayonet 213. When the second latching part 530 is disengaged from the second bayonet 213 under the action of external force, the second elastic member 800 pushes the second connecting part 510 to reset and makes the needle core 600 move in the direction of extending out of the outer housing 100.

[0051] Reference Figure 1 and Figure 11 Figure 1 Figure 11 Figure 1 Figure 11 As shown, it can be understood that a first activation button 410 and a second activation button 420 are slidably disposed between the outer housing 100 and the mounting housing 200. The first activation button 410 is used to push the first connecting part 310 to engage with the first bayonet 221, and the second activation button 420 is used to push the second connecting part 510 to engage with the second bayonet 213.

[0052] It is foreseeable that the first snap-fit ​​part 330, the first connecting part 310, and the first sliding limiting part 320 are integrally injection molded from plastic materials with low friction, such as polytetrafluoroethylene, polyetheretherketone, and polyoxymethylene. The second snap-fit ​​part 530, the second connecting part 510, and the second sliding limiting part 520 are integrally injection molded from plastic materials with low friction, such as polytetrafluoroethylene, polyetheretherketone, and polyoxymethylene.

[0053] Usage steps: In use, the operator presses the first trigger button 410 to push the first connecting part 310 into engagement with the first bayonet 221, and presses the second trigger button 420 to push the second connecting part 510 into engagement with the second bayonet 213. The operator pushes the firing assembly 900, which pushes the second mounting block 500 out of the second bayonet 213. The second elastic element 800 pushes the second mounting block 500 forward, causing the needle core 600 to extend forward first. After the needle core 600 extends to its position, the second mounting block 500 impacts the first mounting block 300 and leaves the first bayonet 221. The first mounting block 300 moves forward under the action of the first elastic element 700, thereby causing the needle tube 400 to extend forward. This achieves the technical effect of automatic sequential extension of the needle core 600 and the needle tube 400.

[0054] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A biopsy needle segmented firing control device, comprising: The utility model relates to a pen needle cartridge and needle core disengaging mechanism, comprising: An outer shell (100); A mounting shell (200) arranged in the outer shell (100), the mounting shell (200) is provided with a containing cavity (210), the containing cavity (210) is divided into a first cavity (211) and a second cavity (212) by an intermediate partition (220), the intermediate partition (220) is provided with a first clamping opening (221), the second cavity (212) is provided with a second clamping opening (213) away from the side wall of the first cavity (211); A first mounting block (300) slidingly arranged in the first cavity (211), the first mounting block (300) is connected with a needle tube (400) extending out of the outer shell (100), the first mounting block (300) is clamped in the first clamping opening (221); A second mounting block (500) slidingly arranged in the second cavity (212), the second mounting block (500) is connected with a needle core (600) extending out of the outer shell (100), the needle core (600) is arranged in the needle tube (400); A first elastic member (700) arranged in the first cavity (211), the first elastic member (700) is used for driving the first mounting block (300) away from the first clamping opening (221); A second elastic member (800) arranged in the second cavity (212), the second elastic member (800) is used for driving the second mounting block (500) away from the second clamping opening (213), the second mounting block (500) can push the first mounting block (300) away from the first clamping opening (221); A firing assembly (900) slidingly arranged between the outer shell (100) and the mounting shell (200), the firing assembly (900) is used for pushing the second mounting block (500) away from the second clamping opening (213).

2. The biopsy needle segmented firing control device of claim 1, wherein: The firing assembly (900) comprises a sliding part (910), the sliding part (910) is provided with a firing sliding groove (911), an inner wall of the outer shell (100) is provided with a firing sliding block (110), the firing sliding block (110) extends into the firing sliding groove (911) to limit the sliding part (910).

3. The biopsy needle segmented firing control device of claim 2, wherein: The sliding part (910) is provided with an inclined groove (912) on the side close to the mounting shell (200), the inclined groove (912) is aligned with the second mounting block (500) in the front-back direction, and the inclined groove (912) is used for pushing the second mounting block (500) away from the second clamping opening (213).

4. The biopsy needle segmented firing control device of claim 3, wherein: The firing assembly (900) comprises a side button (920) extending out of the side of the outer shell (100), the side button (920) is connected with the sliding part (910) through a side plate (930), the sliding part (910) is provided with a rear button (940) extending out of the rear end of the outer shell (100), and the rear button (940) and the side button (920) can drive the sliding part (910) to move forward and backward.

5. The biopsy needle segmented firing control device of claim 4, wherein: The sliding part (910) is provided with reset parts (913) on both sides, the outer shell (100) is provided with two blocking blocks (120) on the inner side, the blocking blocks (120) are in contact with the corresponding reset parts (913), and the reset parts (913) drive the sliding part (910) to move back by relying on the elasticity thereof.

6. The biopsy needle segmented firing control device of claim 1, wherein: The first mounting block (300) comprises a first connecting part (310) and a first sliding limiting part (320), the mounting shell (200) is provided with sliding holes (230) on both sides, the first sliding limiting part (320) extends into the sliding hole (230) and can slide along the sliding hole (230), the first connecting part (310) is connected with the first sliding limiting part (320), and the first connecting part (310) is used for fixing the needle tube (400).

7. The biopsy needle segmented firing control device of claim 6, wherein: The first mounting block (300) comprises a first clamping part (330), the first clamping part (330) is connected with the first sliding limiting part (320), the first clamping part (330) can be clamped in the first clamping hole (221), the first elastic member (700) is sleeved outside the first clamping part (330), and the first elastic member (700) is used for driving the needle tube (400) to move towards the direction of extending out of the outer shell (100).

8. The biopsy needle segmented firing control device of claim 7, wherein: The second mounting block (500) comprises a second connecting part (510) and a second sliding limiting part (520), the second sliding limiting part (520) extends into the sliding hole (230) and can slide along the sliding hole (230), the second connecting part (510) is connected with the second sliding limiting part (520), and the second connecting part (510) is used for fixing the needle tube (400).

9. The biopsy needle segmented firing control device of claim 8, wherein: The second mounting block (500) comprises a second clamping part (530), the second clamping part (530) is connected with the second sliding limiting part (520), the second clamping part (530) can be clamped in the second clamping hole (213), the second elastic member (800) is sleeved outside the second clamping part (530), and the second elastic member (800) is used for driving the needle tube (400) to move towards the direction of extending out of the outer shell (100).

10. The biopsy needle segmented firing control device of claim 9, wherein: The first trigger button (410) and the second trigger button (420) are arranged in a sliding mode between the outer shell (100) and the mounting shell (200), the first trigger button (410) is used for clamping the first connecting part (310) and the first clamping hole (221), and the second trigger button (420) is used for clamping the second connecting part (510) and the second clamping hole (213).

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