Puncture assembly capable of conveniently controlling needle inserting depth

Abstract

A puncture assembly convenient to control needle inserting depth relates to the technical field of medical biopsy tools and comprises a puncture needle and a needle core which are movably connected in an inserted mode. The device is characterized by further comprising a positioning seat, an extrusion head and a locking screw, a through hole through which the puncture needle can movably penetrate is formed in the body of the positioning seat, and a rubber ring correspondingly sleeved with the body of the puncture needle is fixedly connected in the through hole; a cavity with an open end is formed in the side, corresponding to the through hole, of the positioning seat, an extrusion head capable of extruding the rubber ring is arranged in the cavity in a sliding fit mode, and the open end of the cavity is in threaded connection with a locking screw capable of pushing the extrusion head; the positioning seat can be fixed at a proper position of the needle body of the puncture needle according to actual requirements, and the puncture depth of the puncture needle can be limited through the positioning seat during puncture operation, so that accurate and rapid puncture operation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical biopsy tools, in particular to a puncture component which is convenient for controlling the depth of needle insertion. Background Art

[0002] At present, for patients with serosal effusion, lymphatic hematopoietic system diseases, nervous system diseases, etc., in order to clarify the disease diagnosis, the relevant departments will respectively adopt thoracentesis, abdominal puncture, bone marrow puncture and lumbar puncture to obtain samples, so as to clarify the disease diagnosis, and for patients with pleural effusion and abdominal effusion, it can also have a certain decompression treatment effect; the existing puncture needle usually has two sets together, the inner puncture needle is made of a soft material, and combined with the needle core, it can complete lumbar puncture, and the outer puncture needle is harder in texture. With the outer puncture needle and the positioning seat, thoracentesis, abdominal puncture and bone marrow puncture can be completed; but different puncture operations require different puncture depths and different puncture needle lengths; in order to solve the above problems, length-adjustable puncture needles have appeared on the market, but most of the existing length-adjustable puncture needles have the defects of complex structure, high production difficulty and high use cost;

[0003] A Chinese patent (publication number: CN220370044U) discloses a graduated ultrasound-guided spinal anesthesia puncture needle; the patent includes a needle head, a sealing block is slidably connected to the needle head, and a slide groove matching the sealing block is provided in the needle head; an adjustment block is rotatably connected to the needle head, and a first control mechanism matching the adjustment block is provided in the needle head; a connecting tube is fixedly connected to one end of the needle head; although it can directly observe the puncture depth for precise puncture, its structure is complex and the cost of use is relatively high. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a puncture assembly which is convenient for controlling the needle insertion depth.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A puncture assembly that is convenient for controlling the depth of needle insertion, comprising a puncture needle and a needle core, wherein the needle core is movably plugged into the puncture needle; the invention is characterized in that it also comprises a positioning seat, an extrusion head and a locking screw; the positioning seat body is provided with a through hole through which the puncture needle can movably pass, and a rubber ring corresponding to the puncture needle body is fastened in the through hole; a cavity with an open end is provided on one side of the positioning seat corresponding to the through hole, an extrusion head capable of extruding the rubber ring is slidably fitted in the cavity, and a locking screw capable of pushing the extrusion head is threadedly connected to the open end of the cavity.

[0007] Preferably, an arc-shaped groove capable of correspondingly matching with the rubber ring is provided on one side of the extrusion head corresponding to the rubber ring.

[0008] Preferably, the extrusion head is rotatably connected to the locking screw.

[0009] Preferably, arc-shaped ears are provided on both sides of the positioning seat corresponding to the locking screw.

[0010] Preferably, the surface of the arc-shaped ear piece is provided with anti-slip patterns or anti-slip particles.

[0011] Preferably, the puncture needle body is provided with scale lines.

[0012] Preferably, the puncture needle seat is detachably connected with a Y-type connector.

[0013] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0014] The utility model discloses a puncture assembly which is convenient for controlling the depth of needle insertion, has a simple structure, is easy to use and has a low cost of use; the positioning seat body is provided with a through hole which can allow the puncture needle to movably pass through, and a rubber ring which is correspondingly sleeved with the puncture needle body is fastened and connected in the through hole; when in use, the puncture needle is passed through the rubber ring, and the positioning seat is adjusted to a suitable position of the puncture needle body according to actual needs, and then the locking screw is screwed to make the locking screw push the extrusion head, and the extrusion head extrudes the rubber ring, the rubber ring is deformed and then holds the puncture needle tightly, so that the positioning seat can be fixed, and at the same time the rubber ring can protect the puncture needle and prevent the extrusion head from directly contacting the puncture needle and causing damage to the puncture needle; during the puncture operation, the puncture depth of the puncture needle can be limited by the positioning seat, so as to achieve accurate and rapid puncture operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the positioning seat;

[0017] Figure 3 It is a schematic diagram of the structure of the Y-type connector.

[0018] In the figure: 1. puncture needle; 2. needle core; 3. positioning seat; 4. extrusion head; 5. locking screw; 6. rubber ring; 7. arc ear piece; 8. Y-type connector. DETAILED DESCRIPTION

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0020] Embodiment 1, in combination with Figures 1-2 A puncture assembly for controlling the depth of needle insertion, comprising a puncture needle 1 and a needle core 2, wherein the needle core 2 is movably connected to the puncture needle 1; wherein the puncture needle 1 ... The mouth end is threadedly connected with a locking screw 5 that can push the extrusion head 4, that is, the locking screw 5 can push the extrusion head 4, the extrusion head 4 squeezes the rubber ring 6, the rubber ring 6 is deformed and then holds the puncture needle 1 tightly, so that the positioning seat 3 is firmly fixed on the needle body of the puncture needle 1, and the rubber ring 6 can protect the puncture needle 1, and prevent the extrusion head 4 from directly contacting the puncture needle 1 and causing damage to the puncture needle 1; there is friction resistance between the rubber ring 6 and the needle body of the puncture needle 1, which prevents the positioning seat 3 from directly separating from the puncture needle 1 when the locking screw 5 is loosened;

[0021] When in use, the puncture needle 1 is passed through the rubber ring 6, and the positioning seat 3 is adjusted to a suitable position of the needle body of the puncture needle 1 according to actual needs, and then the locking screw 5 is screwed to make the locking screw 5 push the extrusion head 4, and the extrusion head 4 squeezes the rubber ring 6. The rubber ring 6 is deformed and then holds the puncture needle 1 tightly, so that the positioning seat 3 can be fixed. During the puncture operation, the puncture depth of the puncture needle 1 can be limited by the positioning seat 3, thereby achieving accurate and fast puncture operation.

[0022] Embodiment 2, in combination with Figures 1-2 , a puncture assembly that is convenient for controlling the needle insertion depth. The difference from Example 1 is that, on the basis of Example 1, an arc-shaped groove that can be adapted to the rubber ring 6 is provided on the side of the extrusion head 4 corresponding to the rubber ring 6. The arc-shaped groove can wrap and limit the rubber ring 6, thereby improving the stability of the rubber ring 6 and improving the reliability of fixing the positioning seat 3; the extrusion head 4 is rotatably connected to the locking screw 5, which can reduce the friction between the extrusion head 4 and the locking screw 5, and prevent the locking screw 5 from driving the extrusion head 4 to rotate. At the same time, when adjusting the position of the positioning seat 3, the locking screw 5 can be screwed in the opposite direction, so that the locking screw 5 drives the extrusion head 4 to retreat, which is convenient for adjusting the position of the positioning seat 3.

[0023] Embodiment 3, in combination with Figures 1-2, a puncture assembly that is convenient for controlling the needle insertion depth. On the basis of embodiment 1 or 2, the positioning seat 3 is provided with arc-shaped ear pieces 7 on both sides corresponding to the locking screw 5, that is, during the puncture operation, the operator can pinch the two arc-shaped ear pieces 7 to assist in positioning the puncture needle 1, improve the stability of the puncture needle 1, and improve the accuracy of the puncture operation; the surface of the arc-shaped ear piece 7 is provided with anti-slip patterns or anti-slip particles, which can improve the operating feel of the operator; the needle body of the puncture needle 1 is provided with scale lines, which can facilitate accurate adjustment of the position of the positioning seat 3.

[0024] Embodiment 4, in combination with Figures 1 to 3 , a puncture assembly that is convenient for controlling the needle insertion depth. On the basis of any one of embodiments 1 to 3, the puncture needle 1 needle seat is detachably connected to a Y-type connector 8, that is, the needle core 2 can be pulled out after the puncture operation, and the Y-type connector 8 is installed on the puncture needle 1 needle seat for drainage or sampling operations; both connecting ends of the Y-type connector 8 are connected to self-closing needles, which are convenient for connection with a sampling tube.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A puncture assembly for conveniently controlling the depth of needle insertion, comprising a puncture needle (1) and a needle core (2), wherein the needle core (2) is movably connected to the puncture needle (1); wherein: The invention also comprises a positioning seat (3), an extrusion head (4) and a locking screw (5); the body of the positioning seat (3) is provided with a through hole through which the puncture needle (1) can movably pass, and a rubber ring (6) corresponding to the needle body of the puncture needle (1) is fastened in the through hole; a cavity with one end open is provided on one side of the positioning seat (3) corresponding to the through hole, and an extrusion head (4) capable of extruding the rubber ring (6) is slidably fitted in the cavity, and a locking screw (5) capable of pushing the extrusion head (4) is threadedly connected at the open end of the cavity.

2. The puncture assembly for controlling the needle insertion depth according to claim 1, characterized in that: An arc-shaped groove capable of correspondingly matching the rubber ring (6) is provided on one side of the extrusion head (4).

3. The puncture assembly for controlling the needle insertion depth according to claim 1, characterized in that: The extrusion head (4) is rotatably connected to the locking screw (5).

4. The puncture assembly for controlling the needle insertion depth according to claim 1, characterized in that: Arc-shaped ears (7) are provided on both sides of the positioning seat (3) corresponding to the locking screw (5).

5. The puncture assembly for controlling the needle insertion depth as claimed in claim 4, characterized in that: The surface of the arc-shaped ear piece (7) is provided with anti-skid patterns or anti-skid particles.

6. The puncture assembly for controlling the needle insertion depth according to claim 1, characterized in that: The puncture needle (1) is provided with scale marks on its needle body.

7. The puncture assembly for controlling the needle insertion depth according to claim 1, characterized in that: The needle seat of the puncture needle (1) is detachably connected to a Y-shaped connector (8).

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