Transmission structure of rotary cutting biopsy needle

Abstract

The transmission structure comprises a connecting sleeve, a fixing sleeve and a transmission sleeve, the connecting sleeve is arranged at the tail end of the biopsy needle in a sleeving mode, the connecting sleeve comprises a connecting part, a threaded part and a limiting part, the threaded part is arranged between the connecting part and the limiting part, and a mounting hole used for allowing the biopsy needle to penetrate through is formed in the connecting sleeve; the fixing sleeve is used for limiting the biopsy needle in the biopsy gun, a threaded hole is formed in the center of the fixing sleeve, internal threads are arranged on the inner wall of the threaded hole, and the internal threads are in threaded fit with the threaded part; the transmission sleeve is matched with the limiting part and is used for driving the limiting part and the biopsy needle to rotate; according to the transmission structure of the rotary cutting biopsy needle, the connecting sleeve, the fixing sleeve and the transmission sleeve are matched, the biopsy needle can rotate and advance and retreat only through a single motor, the structure is simple and compact, the occupied space is small, and cost is low.

Description

Technical Field

[0001] The utility model relates to a biopsy technology, in particular to a transmission structure of a rotary cutting biopsy needle. Background Art

[0002] Breast biopsy, short for "breast biopsy", refers to a method of taking diseased tissue from a patient's body by means of local resection, forceps extraction, puncture needle aspiration, scraping, removal and other surgical methods for pathological examination to determine the diagnosis;

[0003] At present, a disposable breast biopsy needle uses a double-motor drive method, that is, one motor controls the forward and backward movement of the rotary cutting needle to facilitate fine adjustment and accurately locate the lesion, and the other motor is used to control the rotary movement of the rotary cutting needle for rotary cutting of biopsy samples; however, the double-motor drive structure has many parts, a complex structure, and occupies a large space, resulting in a relatively large size of the biopsy gun, difficult to operate, and the cost of the power device is relatively high. The double-motor structure leads to a high price of the biopsy gun. Content of the Utility Model

[0004] To solve the defects of the above-mentioned prior art, the utility model provides a transmission structure of a rotary cutting biopsy needle, which can realize the rotation and forward and backward movement of the rotary cutting needle with only a single motor, has a simple and compact structure, occupies a small space, and has a low cost.

[0005] To achieve the above technical purpose, the utility model adopts the following technical scheme: A transmission structure of a rotary cutting biopsy needle is arranged in a biopsy gun and includes

[0006] A connecting sleeve is sleeved on the end of the biopsy needle. The connecting sleeve includes a connecting part, a threaded part and a limiting part. The threaded part is arranged between the connecting part and the limiting part. An installation hole for passing through the biopsy needle is provided on the connecting sleeve;

[0007] A fixed sleeve is used to limit the biopsy needle in the biopsy gun. A threaded hole is provided at the center of the fixed sleeve, and an internal thread is provided on the inner wall of the threaded hole. The internal thread is in threaded cooperation with the threaded part;

[0008] A transmission sleeve is matched with the limiting part and is used to drive the limiting part and the biopsy needle to rotate.

[0009] Preferably, the connecting part is cylindrical.

[0010] Preferably, the limiting part is cylindrical, and the vertical cross-section of the limiting part is a regular hexagon.

[0011] Preferably, a key is provided on the biopsy needle, and a key groove is provided on the inner wall of the installation hole. The key is matched with the key groove to limit the biopsy needle in the connecting sleeve.

[0012] Preferably, a first limiting plate and a second limiting plate are respectively arranged on both sides of the fixed sleeve, and the size of the second limiting plate is larger than that of the first limiting plate.

[0013] Preferably, a limiting hole is arranged at the center of the transmission sleeve, and the limiting hole is in a profiling fit with the limiting part. A gear is sleeved outside the transmission sleeve, and the gear is in transmission connection with the power unit.

[0014] In summary, the following technical effects are achieved by the present utility model:

[0015] For the transmission structure of the rotary cutting biopsy needle of the present utility model, by using the cooperation of the connecting sleeve, the fixed sleeve and the transmission sleeve, only a single motor is needed to realize the rotation and advance / retreat actions of the biopsy needle. The structure is simple and compact, occupies a small space, and has a low cost. Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the transmission structure of the rotary cutting biopsy needle of the present utility model;

[0017] Figure 2 is a sectional view of the transmission structure of the rotary cutting biopsy needle of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the connecting sleeve of the transmission structure of the rotary cutting biopsy needle of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the fixed sleeve of the transmission structure of the rotary cutting biopsy needle of the present utility model;

[0020] Figure 5 is a structural schematic diagram of the transmission sleeve of the transmission structure of the rotary cutting biopsy needle of the present utility model

[0021] Explanation of the reference numerals in the drawings of the specification: 1. Biopsy needle; 2. Connecting sleeve; 21. Connecting part; 22. Threaded part; 23. Limiting part; 24. Mounting hole; 3. Fixed sleeve; 31. First limiting plate; 32. Second limiting plate; 33. Threaded hole; 4. Transmission sleeve; 41. Limiting hole; 42. Gear. Detailed Embodiment

[0022] The following further details the present utility model with reference to the drawings.

[0023] This specific embodiment is only an interpretation of the present utility model and does not limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present utility model, it is protected by the Patent Law.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] Embodiment 1:

[0029] As Figure 1-2 shown, a transmission structure of a rotary biopsy needle 1 is provided in a biopsy gun, and includes a connecting sleeve 2, a fixed sleeve 3, and a transmission sleeve 4.

[0030] The transmission structure of the rotary biopsy needle 1 in this embodiment uses a connecting sleeve 2, a fixed sleeve, and a transmission sleeve 4 in cooperation. Only a single motor is required to achieve the rotation and advancement / retreat of the biopsy needle 1. The structure is simple and compact, occupies little space, and has a low cost.

[0031] As Figure 3 shown, the connecting sleeve 2 is sleeved on the end of the biopsy needle 1. The connecting sleeve 2 includes a connecting portion 21, a threaded portion 22, and a limiting portion 23. The threaded portion 22 is disposed between the connecting portion 21 and the limiting portion 23. An installation hole 24 for passing through the biopsy needle 1 is provided on the connecting sleeve 2; the connecting portion 21 is cylindrical; the limiting portion 23 is columnar, and the vertical cross-section of the limiting portion 23 is a regular hexagon; a key is provided on the biopsy needle 1, and a key groove is provided on the inner wall of the installation hole 24. The key and the key groove cooperate to limit the biopsy needle 1 to the connecting sleeve 2.

[0032] The vertical cross-section of the limiting portion 23 can also be other polygons; the fixation of the biopsy needle 1 and the connecting sleeve 2 can also be directly integrally injection molded.

[0033] As Figure 4 shown, the fixed sleeve 3 is used to limit the biopsy needle 1 to the biopsy gun. A threaded hole 33 is provided at the center of the fixed sleeve 3. Internal threads are provided on the inner wall of the threaded hole 33, and the internal threads are in threaded cooperation with the threaded portion 22; a first limiting plate 31 and a second limiting plate 32 are respectively provided on both sides of the fixed sleeve 3, and the size of the second limiting plate 32 is larger than that of the first limiting plate 31.

[0034] The fact that the size of the second limiting plate 32 is larger than that of the first limiting plate 31 is used to prevent the fixed sleeve 3 from being installed reversely, avoiding the wrong thread direction from affecting the advancement / retreat direction of the biopsy needle 1.

[0035] As Figure 5 shown, the transmission sleeve 4 cooperates with the limiting portion 23 and is used to drive the limiting portion 23 and the biopsy needle 1 to rotate; a limiting hole 41 is provided at the center of the transmission sleeve 4, and the limiting hole 41 is in a shape-matching cooperation with the limiting portion 23. A gear 42 is sleeved on the outside of the transmission sleeve 4, and the gear 42 is in transmission connection with the power unit. The power unit is a motor and a driving gear 42.

[0036] During assembly, first fix the fixed sleeve 3 in the biopsy gun, then screw in the biopsy needle 1 and the connecting sleeve 2 that are fixed together. Through the threaded cooperation of the threaded portion 22 and the threaded hole 33, the limitation is achieved. Then sleeve the transmission sleeve 4 on the limiting portion 23 and connect it to the power unit through the gear 42; during use, the power unit drives the transmission sleeve 4 to rotate through the gear 42, drives the connecting sleeve 2 to rotate, realizes the rotation of the biopsy needle 1, and at the same time, the threaded portion 22 in the connecting sleeve 2 rotates and moves along the threaded hole 33 on the fixed sleeve 3, realizing the advancement / retreat of the biopsy needle 1.

[0037] The above description is only a preferred embodiment of the present invention, and does not impose any formal restrictions on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. A transmission structure of a rotary biopsy needle, arranged on a biopsy gun, characterized in that: include A connecting sleeve, which is sleeved on the end of the biopsy needle, and comprises a connecting portion, a threaded portion and a limiting portion, wherein the threaded portion is arranged between the connecting portion and the limiting portion, and a mounting hole for passing the biopsy needle is provided on the connecting sleeve; A fixed sleeve, used to limit the biopsy needle to the biopsy gun, wherein a threaded hole is provided at the center of the fixed sleeve, and an internal thread is provided on the inner wall of the threaded hole, and the internal thread is matched with the thread of the threaded part; The transmission sleeve cooperates with the limiting part and is used to drive the limiting part and the biopsy needle to rotate.

2. The transmission structure of a rotary biopsy needle according to claim 1, characterized in that: The connecting portion is cylindrical.

3. The transmission structure of a rotary biopsy needle according to claim 1, characterized in that: The limiting portion is columnar, and the vertical cross-section of the limiting portion is a regular hexagon.

4. The transmission structure of a rotary biopsy needle according to claim 1, characterized in that: The biopsy needle is provided with a key, and the inner wall of the mounting hole is provided with a key slot, and the key and the key slot cooperate to restrict the biopsy needle to the connecting sleeve.

5. The transmission structure of a rotary biopsy needle according to claim 1, characterized in that: A first limiting plate and a second limiting plate are respectively provided on both sides of the fixed sleeve, and the size of the second limiting plate is larger than that of the first limiting plate.

6. The transmission structure of a rotary biopsy needle according to claim 1, characterized in that: A limiting hole is arranged at the center of the transmission sleeve, and the limiting hole is conformally matched with the limiting portion. A gear is sleeved on the outer side of the transmission sleeve, and the gear is transmission-connected with the power unit.

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