A precision self-locking sliding guide biopsy device

Abstract

The utility model discloses a kind of accurate self-locking sliding guide rail biopsy devices, including shell, needle tube and needle core, needle core is arranged in needle tube inside, needle tube and needle core one end passes out shell, the other end is inserted into shell inside, shell is equipped with for urging needle tube and needle core to retract towards shell inside and lock in the firing mechanism of shell, shell is also equipped with trigger mechanism;Trigger mechanism includes side push button, shell is opened with sliding hole, the left side hole wall and right side hole wall of sliding hole are fixedly installed with linear slide rail, the bottom surface of side push button extends two interval arrangement's clamping arm towards sliding hole, the lateral surface of each clamping arm outward is opened with sliding groove, in assembly state, linear slide rail is placed into sliding groove.Through setting linear slide rail and being opened with sliding groove on side push button, linear slide rail and sliding groove cooperation can effectively guide side push button, ensure that side push button slides along linear direction, avoid the phenomenon such as jamming, solve the problem of abnormal trigger of previous trigger.

Description

Technical Field

[0001] This utility model relates to the field of medical supplies technology, and in particular to a precise self-locking sliding guide biopsy device. Background Technology

[0002] A biopsy device is a medical device used to obtain human tissue samples, mainly for pathological examination to clarify the diagnosis. Under the guidance of imaging equipment, the lesion site is accurately located, and the device is inserted through a small incision in the skin to obtain a sample of the diseased tissue.

[0003] Existing biopsy devices typically include a trigger assembly for triggering the needle to extend outwards. This assembly usually consists of two trigger buttons: one located on the side of the device and the other at the end. The side-mounted button is generally called the trigger. In practical applications, trigger activation is prone to malfunctions. Traditional bushing connections are susceptible to trigger jamming or failure to activate due to improper tolerances, component wear, or environmental factors (such as humidity or dust). This means the trigger cannot slide linearly and is prone to jamming, leading to inconvenience. These issues directly affect the reliability of the biopsy device and the accuracy of clinical procedures, necessitating improvement. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a precise self-locking sliding guide biopsy device, which solves the problem of abnormal triggering in the past by improving the trigger sliding structure.

[0005] To address the aforementioned technical problems, this utility model discloses a precise self-locking sliding guide biopsy device, comprising a housing, a needle tube, and a needle core. The needle core is inserted inside the needle tube, with one end of the needle tube and the needle core extending out of the housing and the other end inserted into the housing. The housing is provided with a firing mechanism for driving the needle tube and the needle core to retract into the housing and lock them in the housing. The housing is also provided with a triggering mechanism for driving the needle tube and the needle core to pop out of the housing. The triggering mechanism includes a side-launch push button that can slide along the length of the housing. The housing has a sliding hole, and linear slide rails are fixedly installed on the left and right walls of the sliding hole. Two spaced-apart holding arms extend from the bottom surface of the side-launch push button toward the sliding hole. Each holding arm has a sliding groove on its outward-facing side. In the assembled state, the linear slide rails are placed in the sliding grooves.

[0006] The firing mechanism includes a sleeve inserted inside the housing. The sleeve has a first cavity and a second cavity arranged at intervals along the axial direction of the sleeve. The first cavity has a first firing slider that can slide within the first cavity, and the second cavity has a second firing slider that can slide within the second cavity. The first firing slider is fixedly connected to the needle tube, and the second firing slider is fixedly connected to the needle core.

[0007] The first cavity has a first locking hole at the bottom, the second cavity has a second locking hole at the bottom, the first firing slider extends a pair of first locking claws toward the first locking hole, and the second firing slider extends a pair of second locking claws toward the second locking hole.

[0008] In the firing state, the pair of first claws are inserted into the first locking hole and latch the bottom of the first cavity, and the pair of second claws are inserted into the second locking hole and latch the bottom of the second cavity.

[0009] The hooks of the first and second jaws are both triangular in shape.

[0010] The firing mechanism also includes a first firing button and a second firing button. The first firing button is engaged with a first firing slider, which can drive the first firing slider to slide along the first cavity. The second firing button is engaged with a second firing slider, which can drive the second firing slider to slide along the second cavity. Both the first firing button and the second firing button are exposed outside the housing.

[0011] The second firing slider has a first V-groove on its end face facing the first firing slider, and both walls of the first V-groove extend outward to form a first protrusion.

[0012] The triggering mechanism further includes a first triggering spring and a second triggering spring; the first triggering spring is sleeved on the outer periphery of the first pawl and located between the first firing slider and the bottom of the first cavity, so that the first triggering spring can drive the first firing slider to slide along the first cavity; the second triggering spring is sleeved on the outer periphery of the second pawl and located between the second firing slider and the bottom of the second cavity, so that the second triggering spring can drive the second firing slider to slide along the second cavity.

[0013] Each clamping arm has a barb at its bottom end, and the sleeve has a mounting hole located below the side push button. In the assembled state, the barb passes through the mounting hole and latches onto the inner wall of the sleeve.

[0014] The triggering mechanism also includes a tail button exposed at the rear end of the housing. The tail button can reciprocate along the axial direction of the housing. The tail button is fixed to the side push button via a connecting rod. A second V-shaped groove is formed at the end of the tail button facing the second claw. Both walls of the second V-shaped groove extend outward to form a second protrusion.

[0015] The tail button is equipped with an elastic arm that drives the tail button to slide outwards from the housing.

[0016] Compared with the prior art, the present invention has the following advantages: by setting a linear slide rail and opening a sliding groove on the side trigger button, the linear slide rail and the sliding groove can effectively guide the side trigger button, ensuring that the side trigger button slides in a linear direction, avoiding jamming and other phenomena, and solving the problem of abnormal triggering in the past. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the biopsy device in this utility model;

[0019] Figure 2 This is an exploded view of the biopsy device of this utility model;

[0020] Figure 3 This is a schematic diagram of the triggering mechanism in this utility model;

[0021] Figure 4 This is a structural schematic diagram of the biopsy device in this utility model from another perspective;

[0022] Figure 5 for Figure 4 Sectional view at point AA. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or server that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or servers.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] This utility model discloses a specific embodiment of a precise self-locking sliding guide biopsy device. Please see [link to embodiment]. Figures 1 to 5 The device includes a housing 1, a needle tube 41, and a needle core 42. The needle core 42 is inserted inside the needle tube 41. One end of the needle tube 41 and the needle core 42 extends out of the housing 1, and the other end is inserted into the housing 1. It should be noted that the end of the needle core 42 has a sampling groove for inserting lesion tissue, and both the end of the needle core 42 and the end of the needle tube 41 have sharp blades.

[0027] In this embodiment, the housing 1 is provided with a firing mechanism for retracting and locking the needle tube 41 and needle core 42 into the housing 1. Specifically, the firing mechanism includes a sleeve 7 inserted inside the housing 1. The sleeve 7 has a first cavity 71 and a second cavity 72 arranged axially along the sleeve 7. The first cavity 71 has a first firing slider 21 that can slide within the first cavity 71, and the second cavity 72 has a second firing slider 22 that can slide within the second cavity 72. The first firing slider 21 is fixedly connected to the needle tube 41, and the second firing slider 22 is fixedly connected to the needle core 42. During operation, driving the first firing slider 21 and the second firing slider 22 to slide along the first cavity 71 and the second cavity 72 respectively can drive the needle core 42 and the needle tube 41 to slide relative to the housing 1, thereby realizing the retraction and extension of the needle core 42 and the needle tube 41.

[0028] In actual production, the dimensional tolerances of key components such as the first firing slider 21 and the second firing slider 22 can be strictly controlled. For example, the thickness tolerance of the sliders is controlled within ±0.05mm, and the width tolerance of the cavity is controlled within ±0.1mm, ensuring the fitting accuracy between parts. At the same time, advanced machining processes, such as electrical discharge machining and electrolytic machining, are adopted to improve the surface quality of the parts, reduce surface roughness, and make the movement of each slider within its corresponding cavity smoother.

[0029] In this embodiment, a first locking hole 81 is provided at the bottom of the first cavity 71, and a second locking hole 82 is provided at the bottom of the second cavity 72. A pair of first locking claws 23 extend from the first firing slider 21 toward the first locking hole 81, and a pair of second locking claws 24 extend from the second firing slider 22 toward the second locking hole 82. In the firing state, the pair of first locking claws 23 insert into the first locking hole 81 and engage the bottom of the first cavity 71, while the pair of second locking claws 24 insert into the second locking hole 82 and engage the bottom of the second cavity 72, thereby locking the needle tube 41 and the needle core 42. In actual production, a quality inspection step can be added to sample and test the locking function of the sliders in each biopsy device. Professional testing equipment, such as high-precision calipers and surface roughness measuring instruments, can be used to inspect the dimensions and surface quality of the parts; simultaneously, actual operation can be simulated to test the locking and unlocking performance of the sliders, ensuring that the product quality meets standards.

[0030] In other embodiments, an auxiliary locking mechanism can be added between the bottom of the cavity and the claw. For example, a magnetic element can be embedded at the end of the claw and a magnetic element can be embedded at the bottom of the cavity. By utilizing the principle of attraction between the two magnetic elements, when the slider moves to the locked position, the magnetic force can make the slider and the cavity fit more tightly, further enhancing the stability of the lock.

[0031] In this embodiment, the hooks of the first jaw 23 and the second jaw 24 are both triangular in shape. Compared to traditional rectangular jaws, the triangular shape provides better self-locking performance. Furthermore, the specifications of the hooks can be precisely calculated to match the sliding distance of the slider, ensuring that the hooks accurately engage each time the slider moves to a predetermined position.

[0032] As a preferred embodiment, the firing mechanism further includes a first firing button 51 and a second firing button 52. The first firing button 51 engages with a first firing slider 21, allowing the first firing button 51 to drive the first firing slider 21 to slide along the first cavity 71. The second firing button 52 engages with a second firing slider 22, allowing the second firing button 52 to drive the second firing slider 22 to slide along the second cavity 72. Both the first firing button 51 and the second firing button 52 are exposed outside the housing 1. In other embodiments, the position and shape of the firing buttons can be optimized, placing them in an easily operable location, such as the side of the biopsy device, and designed with an ergonomic shape, such as a circle or ellipse, to facilitate easy pressing and operation by medical personnel. Simultaneously, the operating stroke of the locking button can be reduced, and by optimizing the internal transmission structure, the locking action can be completed with just a light press, improving operational efficiency.

[0033] In addition, to improve the operating feel, damping structures can be added to the outer periphery of each firing slider. For example, anti-slip textures or a rubber coating can be applied to the outer periphery of the firing slider to increase friction for medical personnel when operating it. This prevents the slider from becoming difficult to slide due to sweaty hands or unstable operation, thus improving the damping feel during operation. Furthermore, clear graduations and indicators can be marked on the slider to facilitate accurate movement of the slider to the desired position by medical personnel.

[0034] As an improvement, the housing 1 is also provided with a trigger mechanism for ejecting the needle tube 41 and needle core 42 outward from the housing 1. The trigger mechanism includes a side-launching push button 31 that can slide along the length of the housing 1. The housing 1 has a sliding hole 11. Linear slide rails 12 are fixedly installed on the left and right walls of the sliding hole 11. Two spaced-apart retaining arms 311 extend from the bottom surface of the side-launching push button 31 toward the sliding hole 11. Each retaining arm 311 has a sliding groove 312 on its outward-facing side. In the assembled state, the linear slide rails 12 are placed in the sliding grooves 312. Each retaining arm 311 has a barb at its bottom end. The sleeve 7 has a mounting hole 73 located below the side-launching push button 31. In the assembled state, the barb passes through the mounting hole 73 and engages with the inner wall of the sleeve 7.

[0035] The biopsy device in this embodiment redesigns the connection structure between the trigger and other components, and adopts a high-precision sliding guide rail to replace the original simple bushing connection. This ensures that the trigger (side push button 31) moves smoothly and accurately, reduces the risk of shaking and jamming, and makes the trigger (side push button 31) move in a straight line along a predetermined trajectory, thereby improving the reliability of triggering.

[0036] In other embodiments, the trigger stroke and force design of the side push button 31 can be improved. Based on ergonomic principles and combined with the operating habits of doctors in actual use scenarios, the trigger force and stroke of the side push button 31 can be reasonably adjusted to make the side push button 31 easier and more natural to press, while ensuring the reliability of the trigger action.

[0037] The triggering mechanism also includes a first trigger spring 61 and a second trigger spring 62. The first trigger spring 61 is sleeved on the outer periphery of the first pawl 23 and located between the first firing slider 21 and the bottom of the first cavity 71, so that the first trigger spring 61 can drive the first firing slider 21 to slide along the first cavity 71. The second trigger spring 62 is sleeved on the outer periphery of the second pawl 24 and located between the second firing slider 22 and the bottom of the second cavity 72, so that the second trigger spring 62 can drive the second firing slider 22 to slide along the second cavity 72. The elastic component can be improved by selecting a high-elasticity, fatigue-resistant spring material, such as a beryllium bronze spring. Furthermore, the specifications and parameters of the spring can be rationally designed according to the locking force required to ensure that the spring can provide sufficient and stable elastic force, so that the locking component always remains in the locked state.

[0038] In this embodiment, the triggering mechanism also includes a tail button 32 exposed at the tail end of the housing 1. The tail button 32 can reciprocate along the axial direction of the housing 1, and the tail button 32 is fixedly connected to the side push button 31 via a connecting rod. The internal transmission structure is optimized, key components are made of high-strength and wear-resistant materials, the diameter and strength of the connecting rod are increased, and the surface is hardened to reduce wear and deformation.

[0039] To ensure triggering stability, the second firing slider 22 has a first V-groove 221 on its end face facing the first firing slider 21, with both walls of the first V-groove 221 extending outwards to form first protrusions 222. The tail button 32 has a second V-groove 321 at its end facing the second claw 24, with both walls of the second V-groove 321 extending outwards to form second protrusions 322. The tail button 32 is equipped with an elastic arm 323 that drives the tail button 32 to slide outwards from the housing 1. The first protrusions 222 and the second protrusions 322 effectively drive the paired first claws 23 and the paired second claws 24 to close together, ensuring that the first claws 23 and the second claws 24 can smoothly exit the first engagement hole 81 and the second engagement hole 82.

[0040] In addition, adding desiccants and dust bags to the product packaging effectively protects the biopsy device during transportation and storage, reducing the impact of environmental factors on the trigger. The desiccant absorbs moisture inside the packaging, preventing parts from rusting due to dampness; the dust bag prevents dust from entering the packaging, keeping the trigger clean.

[0041] The biopsy device in this embodiment operates as follows: First, locate the area requiring biopsy. Then, press the first firing button 51 and the second firing button 52 to retract the needle tube 41 and needle core 42 into the housing 1. At this time, the paired first claws 23 pass through the first locking hole 81, and the paired second claws 24 pass through the second locking hole 82. The first claws 23 engage the bottom of the first cavity 71, and the second claws 24 engage the bottom of the second cavity 72. Simultaneously, the first trigger spring 61 and the second trigger spring 62 are compressed, completing the locking of the firing state. Next, align the needle tube 41 and needle core 42 with the area requiring biopsy and push the side firing push button 31 or press the tail button 32. Since the side firing push button 31 and the tail button 32 are fixed together by a connecting rod, triggering can be performed regardless of whether the side firing push button 31 or the tail button 32 is activated. After pushing the side-launch push button 31 or the button at the tail end 32, the second V-shaped groove 321 of the tail button 32 will drive the hook of the second claw 24 to close, so that the second claw 24 will disengage from the second engagement hole 82. The second trigger spring 62 in the compressed state will drive the second firing slider 22 to slide towards the first claw 23. During the sliding process, since the second firing slider 22 is fixed to the needle core 42, the second firing slider 22 will drive the needle core 42 to puncture the lesion, so that the tissue is placed into the sampling groove at the end of the needle core 42. When the first V-groove 221 at the end of the second firing slider 22 abuts against the paired first claws 23, the first V-groove 221 drives the hooks of the paired first claws 23 to close, thereby allowing the paired first claws 23 to exit the first engagement hole 81. The first trigger spring 61 in the compressed state drives the first firing slider 21 to slide along the first cavity 71. Since the first firing slider 21 is fixedly connected to the needle tube 41, the sliding of the first firing slider 21 will cause the needle tube 41 to pop out, thereby causing the blade at the end of the needle tube 41 to cut the tissue and wrap the tissue left in the sampling groove after cutting. Finally, the needle core 42 and needle tube 41 of the biopsy device are withdrawn to complete the biopsy operation.

[0042] Compared with the prior art, the biopsy device of this embodiment, by setting a linear slide rail 12 and opening a sliding groove 312 on the side push button 31, can effectively guide the side push button by the cooperation of the linear slide rail 12 and the sliding groove 312, ensuring that the side push button 31 slides in a linear direction, avoiding phenomena such as jamming, and solving the problem of abnormal triggering in the past.

[0043] To improve the machining accuracy of parts, strict control is exercised over the dimensional tolerances of the trigger and related components. For example, the machining tolerance of the trigger shaft is controlled within ±0.01mm, and the tolerance of the bushing is controlled within ±0.02mm, ensuring the fit accuracy between parts. Simultaneously, the surface roughness of parts is reduced by fine grinding and polishing of key parts such as the trigger, achieving a surface roughness of Ra0.8 or lower to reduce friction. Assembly processes are optimized by developing detailed assembly operation procedures and employing automated assembly equipment to assist in assembly, ensuring that each part is accurately installed. For example, high-precision positioning fixtures are used to fix the trigger and other components, and automated equipment is used for precise installation and adjustment to ensure the installation accuracy of the trigger. In the product quality inspection stage, specialized testing of the trigger's triggering performance is added. Professional testing equipment is used to simulate the triggering action in actual use, rigorously testing parameters such as triggering force, triggering stroke, and triggering reliability to ensure that the trigger of each live-detector device functions properly.

[0044] Finally, it should be noted that the precise self-locking sliding guide biopsy device disclosed in this utility model embodiment is only a preferred embodiment of this utility model and is only used to illustrate the technical solution of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A precise self-locking sliding guide biopsy device, characterized in that, The device includes a housing, a needle tube, and a needle core. The needle core is inserted inside the needle tube. One end of the needle tube and the needle core protrudes from the housing, and the other end is inserted into the housing. The housing is provided with a firing mechanism for retracting the needle tube and the needle core into the housing and locking them in the housing. The housing is also provided with a triggering mechanism for ejecting the needle tube and the needle core out of the housing. The triggering mechanism includes a side-launching push button that can slide along the length of the housing. The housing has a sliding hole, and linear slide rails are fixedly installed on the left and right walls of the sliding hole. Two spaced-apart holding arms extend from the bottom surface of the side-launching push button toward the sliding hole. Each holding arm has a sliding groove on its outward-facing side. In the assembled state, the linear slide rails are placed into the sliding grooves.

2. The precise self-locking sliding guide biopsy device according to claim 1, characterized in that, The firing mechanism includes a sleeve passing through the housing. The sleeve has a first cavity and a second cavity arranged at intervals along the axial direction of the sleeve. The first cavity has a first firing slider that can slide within the first cavity. The second cavity has a second firing slider that can slide within the second cavity. The first firing slider is fixedly connected to the needle tube, and the second firing slider is fixedly connected to the needle core.

3. The precise self-locking sliding guide biopsy device according to claim 2, characterized in that, The bottom of the first cavity is provided with a first locking hole, and the bottom of the second cavity is provided with a second locking hole. The first firing slider extends a pair of first locking claws toward the first locking hole, and the second firing slider extends a pair of second locking claws toward the second locking hole. In the firing state, the pair of first claws are inserted into the first locking hole and hold the bottom of the first cavity, and the pair of second claws are inserted into the second locking hole and hold the bottom of the second cavity.

4. The precise self-locking sliding guide biopsy device according to claim 3, characterized in that, The hooks of the first and second jaws are both triangular in shape.

5. The precise self-locking sliding guide biopsy device according to claim 2, characterized in that, The firing mechanism further includes a first firing button and a second firing button. The first firing button is engaged with the first firing slider, so that the first firing button can drive the first firing slider to slide along the first cavity. The second firing button is engaged with the second firing slider, so that the second firing button can drive the second firing slider to slide along the second cavity. Both the first firing button and the second firing button are exposed outside the housing.

6. The precise self-locking sliding guide biopsy device according to claim 2, characterized in that, The second firing slider has a first V-shaped groove on its end face facing the first firing slider, and the two groove walls of the first V-shaped groove extend outward to form a first protrusion.

7. The precise self-locking sliding guide biopsy device according to claim 3, characterized in that, The triggering mechanism further includes a first triggering spring and a second triggering spring; The first trigger spring is sleeved on the outer periphery of the first claw and located between the first firing slider and the bottom of the first cavity, so that the first trigger spring can drive the first firing slider to slide along the first cavity. The second trigger spring is sleeved on the outer periphery of the second pawl and located between the second firing slider and the bottom of the second cavity, so that the second trigger spring can drive the second firing slider to slide along the second cavity.

8. The precise self-locking sliding guide biopsy device according to claim 2, characterized in that, Each of the clamping arms has a barb at its bottom end, and the sleeve has a mounting hole located below the side push button. In the assembled state, the barb passes through the mounting hole and engages with the inner wall of the sleeve.

9. A precise self-locking sliding guide biopsy device according to claim 3, characterized in that, The triggering mechanism also includes a tail button exposed at the tail end of the housing. The tail button can reciprocate along the axial direction of the housing. The tail button is fixed to the side push button via a connecting rod. A second V-shaped groove is formed at the end of the tail button facing the second claw. Both walls of the second V-shaped groove extend outward to form a second protrusion.

10. A precise self-locking sliding guide biopsy device according to claim 9, characterized in that, The tail button is provided with an elastic arm that drives the tail button to slide outwards from the housing.

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