Disposable rotary cutting biopsy needle

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, especially relates to disposable use rotary biopsy needle, including casing, the outer wall top of casing is connected with handle slidingly, the outer wall bottom of handle is provided with negative pressure suction mechanism, the inner wall sliding of casing is connected with booster mechanism, the outer wall fixed connection of casing has fixed block, the outer wall of fixed block is provided with locking mechanism, the outer wall fixed connection of casing has needle tube, the outer wall of needle tube is provided with rotary mechanism, negative pressure suction mechanism includes cross column, the outer wall top of cross column is fixedly connected in the outer wall bottom of handle. In the utility model, press handle to make the cross column fixed with it push the piston and press downward, when down to certain distance, through the second sliding tooth of constantly stirring in the left side of casing, make the cross column move slowly, whole mechanism realizes negative pressure suction at the same time to make manual device also can achieve accurate regulation.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a disposable rotary biopsy needle. Background Technology

[0002] The single-use rotary biopsy needle is an advanced instrument designed specifically for medical biopsies. It uses rotary cutting technology to efficiently cut tissue and obtain high-quality samples. The operation is simple and quick, easy for doctors to master, and reduces patient discomfort. Its single-use nature ensures sterility, eliminates the risk of cross-infection, protects medical safety, provides reliable diagnostic evidence, and improves detection accuracy. Made of medical-grade materials, it is durable and reliable, making it an indispensable tool in modern medicine. It is suitable for various clinical scenarios and improves overall medical efficiency.

[0003] Traditional rotary biopsy needles operate by having doctors manually rotate the needle to cut the target tissue and obtain a sample. This method is cumbersome, prone to sample breakage, yields insufficient samples, and causes significant patient discomfort. Current rotary biopsy needles optimize this process by employing a more efficient cutting mechanism to improve sample integrity and reduce operation time. However, in practice, these devices lack a negative pressure suction mechanism. The absence of this mechanism necessitates manual needle withdrawal during sampling, leading to the loss of small amounts of tissue during withdrawal, which can affect sampling success rates and reduce diagnostic accuracy. Therefore, a disposable rotary biopsy needle is proposed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a disposable rotary biopsy needle, which aims to solve the technical problem in the prior art where the needle body needs to be manually pulled out during sampling, resulting in a small amount of tissue falling off during the needle withdrawal process and failing to be collected completely, thus affecting the sampling success rate and reducing the accuracy of diagnosis.

[0005] To achieve the above objectives, the disposable rotary biopsy needle provided in this embodiment of the utility model includes a housing, a handle slidably connected to the top of the outer wall of the housing, a negative pressure suction mechanism provided at the bottom of the outer wall of the handle, a pressure boosting mechanism slidably connected to the inner wall of the housing, a fixing block fixedly connected to the outer wall of the housing, a locking mechanism provided on the outer wall of the fixing block, a needle tube fixedly connected to the bottom of the outer wall of the housing, and a rotary biopsy mechanism provided on the outer wall of the needle tube;

[0006] The negative pressure suction mechanism includes a cross-shaped column, the top of which is fixedly connected to the bottom of the handle's outer wall. A first sliding tooth is formed on the left side of the cross-shaped column's outer wall, and graduated markings are formed on the front side of the column's outer wall. A cross-shaped groove is formed on the outer wall of the housing, and an adjustment component is located on the left side of the housing's outer wall.

[0007] Optionally, the locking mechanism includes a reinforcing strip, the outer wall of which is fixedly connected to the outer wall of the fixing block, a spring rod fixedly connected to the outer wall of the reinforcing strip, a hoop fixedly connected to the outer wall of the spring rod, a magnetic suction hole being provided at the bottom of the outer wall of the hoop, and a magnetic suction column being slidably connected to the outer wall of the magnetic suction hole.

[0008] Optionally, the locking mechanism further includes a reinforcing block, the inner wall of which is slidably connected to the inner wall of the magnetic column, and the top of the housing is provided with an engagement groove.

[0009] Optionally, the pressurization mechanism includes a piston, the outer wall of which is slidably connected to the inner wall of the housing, and a sealing gasket is fixedly connected to the outer wall of the piston.

[0010] Optionally, the rotary cutting mechanism includes an inner core needle, the outer wall of which is slidably connected to the inner wall of the needle tube, and the outer wall of the needle tube has an outer groove.

[0011] Optionally, the adjustment assembly includes a buffer pad, the inner wall of which is fixedly connected to the outer wall of the rotating shaft, and a limit plate is fixedly connected to the outer wall of the rotating shaft. The outer wall of the limit plate is provided with a second sliding tooth.

[0012] Optionally, a graduated clamp is fixedly connected to the outer wall of the syringe, and a needle tip is fixedly connected to the bottom of the outer wall of the syringe.

[0013] Optionally, a porthole is provided on the front side of the outer wall of the hull, and handles are fixedly connected to both the left and right sides of the outer wall of the hull.

[0014] The disposable rotary biopsy needle provided in this embodiment of the present invention has at least one of the following technical effects:

[0015] 1. In this utility model, pressing the handle causes the cross pin fixed to it to push the piston downward to apply pressure. When it moves down a certain distance, the cross pin moves slowly downward by continuously moving the second sliding tooth located on the left side of the housing. The limiting plate prevents the first sliding tooth and the second sliding tooth from deviating during the downward movement, while the buffer pad improves the stability of the mechanism. The entire mechanism realizes negative pressure attraction while also enabling the manual device to make precise guidance and adjustment.

[0016] 2. In this utility model, the clamp is pulled back and the position of the cross post is adjusted so that the locking groove on the cross post is parallel and aligned with the clamp. After ensuring that there is no error, the clamp is released. The clamp retracts forward under the action of the spring rod connected to it, so that the clamp is fixed with the locking groove. In addition, a magnetic column and a magnetic groove are provided to further improve the stability of the locking. This structure avoids premature cutting of the inner blade and reduces the risk of tissue damage during the puncture process. 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 or the prior art 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 A perspective view of a disposable rotary biopsy needle provided for an embodiment of this utility model.

[0019] Figure 2 A front view of a disposable rotary biopsy needle provided for an embodiment of this utility model.

[0020] Figure 3 A side view of a disposable rotary biopsy needle provided for an embodiment of this utility model.

[0021] Figure 4 A cross-sectional view of the housing of a disposable rotary biopsy needle provided in an embodiment of this utility model.

[0022] Figure 5 A schematic diagram of the locking mechanism of a disposable rotary biopsy needle provided in an embodiment of this utility model.

[0023] The following are the labeling elements in the figure:

[0024] 1—Shell 2—Negative Pressure Suction Mechanism 201—Cross Column 202—First Sliding Tooth 203—Graded Marks 204—Cross Groove 205—Adjusting Component 2051—Second Sliding Tooth 2052—Limiting Plate 2053—Buffer Pad 3—Rotating Shaft 4—Handle 5—Pressure Boosting Mechanism 501—Piston 502—Sealing Gasket 6—Fixing Block 7—Locking Mechanism 701—Reinforcing Strip 702—Spring Rod 703—Hop Strip 704—Magnetic Hole 705—Reinforcing Block 706—Magnetic Column 707—Clamping Groove 8—Needle 9—Spinning Mechanism 901—Inner Core Needle 902—Outer Groove 10—Graded Hoop 11—Needle Tip 12—Handle 13—Porthole Detailed Implementation

[0025] The 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 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 intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] Reference Figure 1 and Figure 4This utility model provides an embodiment of a disposable rotary biopsy needle, comprising a housing 1 for supporting the internal precision components of the biopsy needle and ensuring its operational stability. A handle 4 is slidably connected to the top of the outer wall of the housing 1 for easy sampling and pressing. A negative pressure suction mechanism 2 is provided at the bottom of the outer wall of the handle 4. A pressurizing mechanism 5 is slidably connected to the inner wall of the housing 1. The pressurizing mechanism 5 includes a piston 501 for compressing internal air, thereby generating negative pressure inside the housing 1. The outer wall of the piston 501 is slidably connected to the inner wall of the housing 1, and a sealing gasket 502 is fixedly connected to the outer wall of the piston 501 to improve the operational stability of the piston 501. With high negative pressure capability, a fixing block 6 is fixedly connected to the outer wall of the housing 1 for fixing the locking mechanism 7. The outer wall of the fixing block 6 is provided with the locking mechanism 7. A needle tube 8 is fixedly connected to the bottom of the outer wall of the housing 1, which forms a channel for entering the tissue and provides protection and guidance for the internal cutting device. The outer wall of the needle tube 8 is provided with a rotary cutting mechanism 9. The rotary cutting mechanism 9 includes an inner core needle 901, which is exposed to the target tissue through the outer groove 902 and relies on the rapidly rotating cutting sheath to cut the tissue and store it in the groove. The outer wall of the inner core needle 901 is slidably connected to the inner wall of the needle tube 8. The outer wall of the needle tube 8 is provided with an outer groove 902 to provide the cutting environment for the inner core needle 901.

[0030] The negative pressure suction mechanism 2 includes a cross post 201, which serves as a guide mechanism for generating negative pressure. The top of the outer wall of the cross post 201 is fixedly connected to the bottom of the outer wall of the handle 4. A first sliding tooth 202 is provided on the left side of the outer wall of the cross post 201, and a scale pattern 203 is provided on the front side of the outer wall of the cross post 201 to indicate the depth of the cross post 201. A cross groove 204 is provided on the outer wall of the housing 1, which serves as a guide channel and works in conjunction with the cross post 201. An adjustment component 205 is provided on the left side of the outer wall of the housing 1. The adjustment component 205 includes a buffer pad 2053, which ensures the stability of the operation of the adjustment component 205. The inner wall of the buffer pad 2053 is fixedly connected to the outer wall of the rotating shaft 3. A limit plate 2052 is fixedly connected to the outer wall of the rotating shaft 3 to prevent the second sliding tooth 2051 from deviating from its original position. The outer wall of the limit plate 2052 has a second sliding tooth 2051. The first sliding tooth 202 and the second sliding tooth 2051 are meshed and connected to precisely control the downward movement of the cross post 201.

[0031] Specifically, the housing 1 is the basic supporting component of the entire instrument, bearing the important responsibility of supporting the core components inside the biopsy needle that require high precision. Its core function is to ensure that the overall instrument can maintain the desired stable state during operation. The outer wall of the housing 1 near the upper end is designed to form a sliding connection with the handle 4. This handle 4 provides a convenient pressing point for the user during sampling. On the lower outer surface of the handle 4, which completes the pressing and driving function, the core component of the negative pressure suction mechanism 2 is integrated. The inner wall of the cavity of the housing 1 is also designed with a sliding path along its surface, which is connected to the pressurization mechanism 5. The pressurization mechanism 5 is the key to the power part of the system, mainly composed of piston 501. The movement of this piston 501 is... The compressed air volume inside the device creates the required low-pressure environment within the cavity defined by the housing 1, achieving a negative pressure state. The outer peripheral wall of the piston 501 is constrained to slide against the inner wall of the cavity of the housing 1. To improve the stability of the piston 501 throughout its working stroke and enhance the device's ability to establish a negative pressure area, a special sealing gasket 502 is securely fitted onto the outer surface of the piston 501. A fixing block 6, which acts as a locking support, is fixedly installed at a specific position on the outer surface of the housing 1. The fixing block 6 is equipped with the specific structure of the locking mechanism 7, which is the component that achieves position locking. The lower outer surface of the housing 1 near the working end is fixedly connected to the needle tube 8 responsible for entering the target tissue. This needle tube 8 performs two core functions, the primary function of which is... The needle tube 8 serves two main purposes: firstly, it forms a physical channel for entering the target biological tissue during actual use; secondly, it provides necessary physical shielding and guidance for the cutting module located inside. A rotary cutting mechanism 9, which performs the cutting task, is installed on the surface of the needle tube 8. The working unit of the rotary cutting mechanism 9 consists of an inner core needle 901. This inner core needle 901 is visible at the location where tissue needs to be obtained through an externally visible groove 902. Its mechanism relies on a high-speed rotating cutting protective shell to quickly cut the target tissue and collect it into a pre-set receiving groove on the inner core needle 901. The outer wall structure of the inner core needle 901 is designed to slide against the inner wall of the needle tube 8. The aforementioned external groove 902 is formed in a specific area of ​​the needle tube 8's wall. It is this external groove 902... The 02 setting provides the necessary exposed cutting area and accommodating space for the inner needle 901 to complete the tissue cutting action. The core guiding structure of the negative pressure suction mechanism 2 is a specially designed cross post 201. The part of the cross post 201 near the top is fixedly connected to the bottom surface of the handle 4. On the left side of the outer wall of the cross post 201, there is a layout of first sliding teeth 202 for adjusting the positioning. On the surface near the front of the outer wall of the cross post 201, there are scale marks 203 for observation. The main purpose of these scale marks 203 is to indicate the specific depth of the cross post 201 into the housing 1 during operation. Corresponding to the guiding requirements of the cross post 201, a special cross groove 204 is opened on the outer wall of the housing 1.This groove, precisely fitted with the cross post 201, together forms the linear motion guide path for generating negative pressure and guiding the downward movement of the handle 4. On the outer surface of the left side of the housing 1, an adjustment component 205 is configured to adjust and control the degree of downward pressure. This adjustment component 205 includes a key component, a buffer pad 2053, which enhances operational smoothness. The buffer pad 2053 is firmly fixed to the outer peripheral wall of the central rotating shaft 3 through its inner hole wall. A limit plate 2052 is fixedly installed on the outer periphery of the rotating shaft 3. The limit plate 2052 is designed to prevent unintentional misalignment of the second sliding tooth 2051 with adjustment function during use. The aforementioned second sliding tooth 2051 is specifically machined into a rack on the outer surface of the limit plate 2052. The aforementioned first sliding tooth 202 structure and second sliding tooth 2051 structure mesh with each other, and their meshing relationship works together to effectively control the depth of the downward stroke range of the cross post 201.

[0032] Reference Figure 1 and Figure 5 The locking mechanism 7 includes a reinforcing strip 701, the outer wall of which is fixedly connected to the outer wall of the fixing block 6. The reinforcing strip 701, together with the fixing block 6, further reinforces the locking mechanism 7. A spring rod 702 is fixedly connected to the outer wall of the reinforcing strip 701. The spring rod 702 uses its own preload to reinforce certain components. A hoop 703 is fixedly connected to the outer wall of the spring rod 702, which is used to fix the cross post 201 in a designated position to prevent accidental activation. A magnetic strip is provided at the bottom of the outer wall of the hoop 703. The magnetic suction hole 704 has a magnetic suction post 706 slidably connected to its outer wall. The magnetic suction hole 704 and the magnetic suction post 706 are used together to improve the stability of the clamping bar 703. The locking mechanism 7 also includes a reinforcing block 705. The inner wall of the reinforcing block 705 is slidably connected to the inner wall of the magnetic suction post 706. The reinforcing block 705 is used to fix the magnetic suction post 706. The top of the housing 1 is provided with a locking groove 707. The locking groove 707 is interference-fitted with the clamping bar 703 to restrict the movement of the cross post 201.

[0033] Specifically, the locking mechanism 7 includes a reinforcing strip 701. The outer surface of the reinforcing strip 701 is securely mounted on the corresponding surface of the fixing block 6. The reinforcing strip 701, together with the fixing block 6, provides additional reinforcement and fixation to the locking mechanism 7 itself. A spring rod 702 is connected to the outer surface of the reinforcing strip 701. The spring rod 702, by virtue of its designed elastic properties, provides a tightening effect on the associated components. A hoop 703 is fixedly mounted on the outer surface of the spring rod 702. The task of this hoop 703 is to constrain the cross post 201 to a preset position. A magnetic hole 704 is machined on the outer surface of the hoop 703 near its bottom end. The wall of the hole 704 and the magnetic column 706 form a sliding fit relationship. The magnetic hole 704 and the magnetic column 706 work together to improve the overall stability of the clamping state of the clamping bar 703 through the magnetic field interaction between them. The locking mechanism 7 also includes a reinforcing block 705. The inner wall of the reinforcing block 705 and the side of the column of the magnetic column 706 are in sliding fit. The purpose of the reinforcing block 705 is to fix the spatial position of the magnetic column 706. The top of the housing 1 is provided with a locking groove 707. The locking groove 707 and the clamping bar 703 are connected by an interference fit. Its effect is to completely restrict the movement of the cross column 201.

[0034] Reference Figure 1 , Figure 2 and Figure 3 The outer wall of the needle tube 8 is fixedly connected with a scale clamp 10, and the bottom of the outer wall of the needle tube 8 is fixedly connected with a needle tip 11, which is used to pierce the skin and soft tissue so that the biopsy needle can reach the target lesion smoothly. The front side of the outer wall of the shell 1 is provided with a porthole 13, which makes it easy for the user to observe the internal scale. The left and right sides of the outer wall of the shell 1 are fixedly connected with handles 12, which makes it easy for the user to hold and operate.

[0035] Specifically, a scale clamp 10 is firmly installed on the outer surface of the needle tube 8, and a needle tip 11 for working is fixedly connected to the lower end of the outer surface of the needle tube 8 near the tip. The function of this needle tip 11 is to penetrate the skin and subcutaneous tissue barrier, so that the biopsy instrument can effectively reach the target lesion area. A porthole 13 is provided on the front surface of the housing 1 to provide a visual channel for the operator to observe the scale inside the instrument. Handles 12 are symmetrically arranged on the outer surfaces of the left and right sides of the housing 1. This design is to facilitate the user to hold the entire device stably during operation.

[0036] Working principle: First, during operation, when a pressing action is applied to the handle 4, the movement of the handle 4 drives the cross column 201, which is firmly connected to it, to move downward. The descent of the cross column 201 pushes the piston 501 in the pressurization mechanism 5 to apply downward pressure, thereby creating the required low-pressure environment inside the housing 1. After the cross column 201 moves downward to a certain distance, the operator can move the second sliding tooth 2051 device located in the adjustment component 205 on the left side of the housing 1. The action of the second sliding tooth 2051 causes the cross column 201 to continue to move downward at a slow and stable speed. During the entire downward process, the limiting plate 2052 plays a key constraint function to prevent the first sliding tooth 202 and the second sliding tooth 2051 from shifting positions. The buffer pad 2053 works together to improve the overall smoothness of the mechanism. This system successfully realizes the negative pressure suction mechanism, while allowing manual control based on human power to complete reliable and detailed guiding adjustment operations.

[0037] Furthermore, based on the previous operating procedure, when adjustments are needed, the clamp 703 is manually pulled backward while adjusting the corresponding position of the cross post 201, so that the pre-set engagement groove 707 on the surface of the cross post 201 and the clamp 703 are parallel and aligned. After confirming that the position is accurate, the tension on the clamp 703 is released. At this time, the spring rod 702, due to its own pre-tightening effect, drives the clamp 703 to retract forward and reset, causing the contact part of the clamp 703 to be embedded in the engagement groove 707 to complete the mechanical locking. The device is also equipped with a magnetic column 706 and a corresponding magnetic hole 704. When the two are locked in contact, they enhance the fixation reliability through magnetic attraction. This composite locking structure effectively prevents the inner core needle 901 from rotating unexpectedly during the puncture stage, significantly reducing the possibility of unnecessary damage to the target tissue during the operation.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A disposable rotary biopsy needle, comprising a housing (1), characterized in that: A handle (4) is slidably connected to the top of the outer wall of the housing (1), a negative pressure suction mechanism (2) is provided at the bottom of the outer wall of the handle (4), a pressure boosting mechanism (5) is slidably connected to the inner wall of the housing (1), a fixing block (6) is fixedly connected to the outer wall of the housing (1), a locking mechanism (7) is provided on the outer wall of the fixing block (6), a needle tube (8) is fixedly connected to the bottom of the outer wall of the housing (1), and a rotary cutting mechanism (9) is provided on the outer wall of the needle tube (8). The negative pressure suction mechanism (2) includes a cross post (201), the top of the outer wall of the cross post (201) is fixedly connected to the bottom of the outer wall of the handle (4), a first sliding tooth (202) is provided on the left side of the outer wall of the cross post (201), a scale pattern (203) is provided on the front side of the outer wall of the cross post (201), a cross groove (204) is provided on the outer wall of the housing (1), and an adjustment component (205) is provided on the left side of the outer wall of the housing (1).

2. The disposable rotary biopsy needle according to claim 1, characterized in that: The locking mechanism (7) includes a reinforcing strip (701), the outer wall of which is fixedly connected to the outer wall of the fixing block (6), a spring rod (702) is fixedly connected to the outer wall of the reinforcing strip (701), a hoop (703) is fixedly connected to the outer wall of the spring rod (702), a magnetic suction hole (704) is provided at the bottom of the outer wall of the hoop (703), and a magnetic suction column (706) is slidably connected to the outer wall of the magnetic suction hole (704).

3. The disposable biopsy needle according to claim 1, characterized in that: The locking mechanism (7) also includes a reinforcing block (705), the inner wall of which is slidably connected to the inner wall of the magnetic column (706), and the top of the housing (1) is provided with a locking groove (707).

4. The disposable rotary biopsy needle according to claim 1, characterized in that: The pressurization mechanism (5) includes a piston (501), the outer wall of which is slidably connected to the inner wall of the housing (1), and a sealing gasket (502) is fixedly connected to the outer wall of the piston (501).

5. The disposable biopsy needle according to claim 1, characterized in that: The rotary cutting mechanism (9) includes an inner core needle (901), the outer wall of which is slidably connected to the inner wall of the needle tube (8), and the outer wall of the needle tube (8) is provided with an outer groove (902).

6. The disposable biopsy needle according to claim 1, characterized in that: The adjustment component (205) includes a buffer pad (2053), the inner wall of which is fixedly connected to the outer wall of the rotating shaft (3), and a limiting plate (2052) is fixedly connected to the outer wall of the rotating shaft (3). The outer wall of the limiting plate (2052) is provided with a second sliding tooth (2051).

7. The disposable rotary biopsy needle according to claim 1, characterized in that: The outer wall of the needle tube (8) is fixedly connected with a scale clamp (10), and the bottom of the outer wall of the needle tube (8) is fixedly connected with a needle tip (11).

8. The disposable rotary biopsy needle according to claim 1, characterized in that: A porthole (13) is provided on the front side of the outer wall of the shell (1), and a handle (12) is fixedly connected to both the left and right sides of the outer wall of the shell (1).

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