Excitation force testing tool for outer needle tube of biopsy needle

Abstract

The biopsy needle outer needle tube excitation force testing tool comprises a push-pull force detection module and a needle tube connecting assembly capable of connecting the push-pull force detection module and a biopsy needle outer needle tube. Compared with the prior art, by means of the needle tube connecting assembly, when exciting force of the outer needle tube needs to be detected, an operator only needs to install the self-locking connecting part on the connecting rope on the outer needle tube of the rocket needle, the biopsy needle is excited when the connecting rope is kept in a tightened state, and the needle tube connecting assembly is used for detecting the exciting force of the outer needle tube. Excitation force on the outer needle tube can be directly transmitted to the push-pull force detection module through the self-locking connecting part, and compared with the mode that in the prior art, an operator holds a push-pull force meter to conduct biopsy needle excitation force testing, connection between the push-pull force testing module and the biopsy needle outer needle tube can be more stably guaranteed; and the sensor can obtain excitation force data of the biopsy needle more accurately.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment testing, specifically a biopsy needle external needle tube excitation force testing fixture. Background Technology

[0002] Currently, biopsy needles, as a key tool in medical diagnostics, typically consist of an outer tube, an inner tube, and a firing mechanism. The outer tube is the main outer shell of the biopsy needle, usually made of stainless steel or titanium alloy with a smooth surface to minimize tissue damage. The inner tube is located inside the outer tube and is driven by the firing mechanism to rapidly extend or retract, achieving the cutting and collection of tissue samples. The firing mechanism generally includes a spring, a button, or a mechanical linkage. During sampling, the operator first retracts the inner tube into the outer tube using the switch mechanism, then aligns it with the target tissue and presses the firing switch. This triggers the firing mechanism to release stored elastic potential energy, causing the inner tube to pierce the tissue at high speed and complete sample acquisition. This design relies on precise mechanical control to ensure instantaneous tissue cutting and sampling while avoiding tissue damage or sample contamination due to excessive force.

[0003] In the design and production of biopsy needles, testing their firing force is a crucial step in ensuring product safety and effectiveness. The magnitude of the firing force directly affects the puncture efficiency, the degree of tissue damage, and sample integrity. Insufficient firing force may result in the inner needle failing to effectively penetrate the tissue or incomplete sample collection; excessive firing force may cause tissue tearing or cell damage, affecting pathological diagnostic results. Therefore, quantitatively evaluating the instantaneous firing force of biopsy needles using firing force testing fixtures is a necessary step in product standardization and clinical application.

[0004] However, when measuring the instantaneous excitation force of a biopsy needle, the existing excitation force testing fixtures are difficult to use because the outer and inner surfaces of the biopsy needle are usually precision polished, resulting in an extremely low coefficient of friction. Traditional push-pull force gauges cannot stably fix the needle tube, causing the force sensor to fail to accurately capture the required excitation force. Utility Model Content

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] A biopsy needle outer cannula excitation force testing fixture, including:

[0007] The push-pull force detection module can record the magnitude of the force after the test end is subjected to force;

[0008] The needle tube connection assembly includes a self-locking connector mounted on the surface of the biopsy needle outer tube, and a connecting rope connecting the self-locking connector to the test end of the push-pull force detection module. When the self-locking connector is mounted on the surface of the biopsy needle outer tube, the self-locking connector can move the biopsy needle outer tube together.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the self-locking connection includes a tightening sleeve that can be fitted onto the surface of the biopsy needle outer tube, and a fastening sleeve disposed on the surface of the tightening sleeve. When the fastening sleeve is installed on the tightening sleeve, the tightening sleeve can be clamped onto the surface of the biopsy needle outer tube.

[0011] Furthermore, both the tightening sleeve and the fastening sleeve are tubular structures, and the diameter of the tightening sleeve is greater than or equal to the diameter of the outer needle tube of the biopsy needle.

[0012] Furthermore, the tightening sleeve consists of a fixed collar and several arc-shaped clamps on the surface of the fixed collar, with gaps between adjacent arc-shaped clamps.

[0013] Furthermore, the tightening sleeve and the fastening sleeve are connected by a threaded structure.

[0014] Furthermore, the surface of the fixing collar of the tightening sleeve is provided with an installation groove for inserting a connecting rope.

[0015] Furthermore, the surface of the tightening sleeve's fixing collar is provided with mounting holes for the connecting rope to pass through.

[0016] Beneficial effects

[0017] Compared with the prior art, this utility model, through its needle tube connection component, allows the operator to simply install the self-locking connector on the connecting rope onto the outer needle tube of the rocket needle when the activation force of the outer needle tube needs to be detected. While keeping the connecting rope taut, the biopsy needle is activated, and the activation force on the outer needle tube can be directly transmitted to the push-pull force detection module through the self-locking connector. Compared with the prior art, which relies solely on the operator holding a push-pull force gauge to test the activation force of the biopsy needle, this method can more stably ensure the connection between the push-pull force detection module and the outer needle tube of the biopsy needle, allowing the sensor to obtain the activation force data of the biopsy needle more accurately. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0019] Figure 1 This is a top view schematic diagram of the utility model structure;

[0020] Figure 2 This is a three-dimensional structural diagram of the utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the needle tube connecting assembly of the utility model;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Push-pull force detection module; 2. Needle tube connection assembly; 21. Self-locking connection part; 211. Tightening sleeve; 212. Fastening sleeve; 22. Connecting rope. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the technical product is in use. They are used only for the convenience of describing the technology and simplifying the description, and do not indicate or imply that the device or component 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 the technology. Furthermore, the terms "horizontal," "vertical," and "suspended," etc., do not mean that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] Please see Figure 1-3 A biopsy needle tube excitation force testing fixture includes a push-pull force detection module 1 and a needle tube connection assembly 2 that can connect the push-pull force detection module 1 to the biopsy needle tube.

[0029] Among them, the push-pull force detection module 1 is a common force measuring device in the prior art, such as a strain gauge sensor or a piezoelectric sensor, which supports real-time display and storage of peak force values. The test end can be a sensor contact head or a hook structure, used to transmit external force. After the test end is subjected to force, it can record the magnitude of the force.

[0030] The needle tube connection assembly 2 includes a self-locking connection part 21 installed on the surface of the biopsy needle outer tube, and a connecting rope 22 connecting the self-locking connection part 21 to the test end of the push-pull force detection module 1. When the self-locking connection part 21 is installed on the surface of the biopsy needle outer tube, the self-locking connection part 21 can drive the biopsy needle outer tube to move together. The self-locking connection part 21 can be a mechanical clamping device (such as an elastic buckle, a threaded locking sleeve) or an adsorption device (such as a vacuum suction cup), which must ensure stable contact with the smooth needle tube surface. The connecting rope 22 can be a high-strength nylon rope, steel wire or carbon fiber filament, and its length can be adjusted to match different test distances.

[0031] Specifically, as shown in the figure, the self-locking connection part 21 includes a tightening sleeve 211 that can be fitted onto the surface of the biopsy needle outer tube, and a fastening sleeve 212 disposed on the surface of the tightening sleeve 211. When the fastening sleeve 212 is installed on the tightening sleeve 211, the tightening sleeve 211 can be clamped onto the surface of the biopsy needle outer tube. Both the tightening sleeve 211 and the fastening sleeve 212 are tubular structures. The diameter of the tightening sleeve 211 is greater than or equal to the diameter of the biopsy needle outer tube. The tightening sleeve 211 is composed of a fixing collar and several arc-shaped clamps disposed on the surface of the fixing collar. There is a gap between adjacent arc-shaped clamps. The tightening sleeve 211 and the fastening sleeve 212 are connected by a threaded structure. After the operator installs the tightening sleeve 211 onto the surface of the outer tube, the operator then screws the fastening sleeve 212 onto the tightening sleeve 211. At this time, the connecting rope 22 can complete the stable connection between the push-pull force detection module 1 and the biopsy needle outer tube, ensuring the accuracy of subsequent detection.

[0032] In some embodiments, when the connecting rope 22 is made of a soft material, the surface of the fixing collar of the tightening sleeve 211 is provided with an installation groove for the connecting rope 22 to be inserted. The operator can tie the connecting rope 22 into the installation groove to complete the connection between the connecting rope 22 and the installation groove, which facilitates the replacement of the connecting rope 22.

[0033] In other embodiments, the surface of the fixing collar of the tightening sleeve 211 is provided with a mounting hole for the connecting rope 22 to pass through. The connecting rope 22 may be loop-shaped and pass through the fixing collar, thereby ensuring a stable connection between the connecting rope 22 and the tightening sleeve 211.

[0034] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A biopsy needle outer tube excitation force testing fixture, characterized in that, include: The push-pull force detection module (1) can record the magnitude of the force after the test end is subjected to force; The needle tube connection assembly (2) includes a self-locking connection part (21) installed on the surface of the biopsy needle tube, and a connecting rope (22) connecting the self-locking connection part (21) to the test end of the push-pull force detection module (1). When the self-locking connection part (21) is installed on the surface of the biopsy needle tube, the self-locking connection part (21) can drive the biopsy needle tube to move together.

2. The biopsy needle excitation force testing fixture according to claim 1, characterized in that: The self-locking connection part (21) includes a tightening sleeve (211) that can be fitted onto the surface of the biopsy needle tube, and a fastening sleeve (212) provided on the surface of the tightening sleeve (211). When the fastening sleeve (212) is installed on the tightening sleeve (211), the tightening sleeve (211) can be clamped onto the surface of the biopsy needle tube.

3. The biopsy needle excitation force testing fixture according to claim 2, characterized in that: Both the tightening sleeve (211) and the fastening sleeve (212) are tubular structures, and the diameter of the tightening sleeve (211) is greater than or equal to the diameter of the outer needle tube of the biopsy needle.

4. The biopsy needle outer tube excitation force testing fixture according to claim 3, characterized in that: The tightening sleeve (211) consists of a fixed collar and several arc-shaped clamps on the surface of the fixed collar, with gaps between adjacent arc-shaped clamps.

5. The biopsy needle excitation force testing fixture according to claim 4, characterized in that: The tightening sleeve (211) and the fastening sleeve (212) are connected by a threaded structure.

6. The biopsy needle excitation force testing fixture according to claim 4, characterized in that: The surface of the fixing collar of the tightening sleeve (211) is provided with an installation groove for inserting the connecting rope (22).

7. The biopsy needle excitation force testing fixture according to claim 4, characterized in that: The tightening sleeve (211) has a mounting hole on the surface of the fixing collar for the connecting rope (22) to pass through.

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