Variable-pitch needle holder device

Abstract

The utility model discloses a variable-pitch needle holder device which comprises a blood collection tube sleeve and a blood collection needle fixing seat arranged at the top end of the blood collection tube sleeve, variable-pitch internal threads are arranged on the inner wall of the blood collection needle fixing seat, and the pitch of the variable-pitch internal threads is gradually increased from top to bottom in the axial direction. The blood taking needle fixing seat can be in tight and stable threaded fit with various blood taking needles of different specifications. The device can be effectively matched with blood taking needles of various manufacturers, and the applicability of products is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a variable-pitch needle holder device. BACKGROUND

[0002] Venous blood sampling is an important part of clinical examination. The needle holder, as the core device connecting the blood sampling needle and the blood collection tube, directly affects the operation efficiency and medical safety. In the prior art, the thread interfaces of blood sampling needles from different manufacturers have significant differences. Common thread shapes include triangular, T-shaped, semicircular, etc., resulting in inconsistent thread thickness and pitch. This non-standard design limits the compatibility of blood sampling needles and needle holders, and medical staff need to frequently replace special needle holders, increasing the complexity of operation and medical costs.

[0003] Traditional needle holders use fixed thread structures and can only adapt to blood sampling needles from specific manufacturers. Forced use can cause interface loosening, blood leakage, or blood sampling failure. In addition, inconsistent thread tolerances can also cause blood sampling needle detachment risks, threatening patient safety. Existing solutions rely on customization, but cannot fundamentally solve the multi-brand compatibility problem. Therefore, the utility model provides a variable-pitch needle holder device. UTILITY MODEL CONTENT

[0004] The present application provides a variable-pitch needle holder device, which can effectively adapt to blood sampling needles from various manufacturers, greatly improving the applicability of the product.

[0005] Therefore, the present application provides a variable-pitch needle holder device, which includes a blood collection tube sleeve and a blood sampling needle fixing seat arranged at the top end of the blood collection tube sleeve.

[0006] The inner wall of the blood sampling needle fixing seat is provided with a variable-pitch internal thread.

[0007] The pitch of the variable-pitch internal thread gradually increases from top to bottom along the axial direction, so that the blood sampling needle fixing seat can achieve tight and stable thread cooperation with blood sampling needles of multiple different specifications.

[0008] Optionally, the pitch of the variable-pitch internal thread increases linearly from top to bottom along the axial direction, and the minimum pitch of the variable-pitch internal thread is 2.5 mm and the maximum pitch is 3 mm.

[0009] Optionally, the surface of the variable-pitch internal thread is wrapped with an elastic adaptation layer for compensating for the thread shape differences of different blood sampling needles.

[0010] Optionally, the material of the elastic adaptation layer is silicone or thermoplastic elastomer material.

[0011] Optionally, the thread shape of the variable-pitch internal thread is trapezoidal, triangular, or rectangular.

[0012] Optionally, the blood collection tube sleeve and the blood collection needle fixing seat are integrally formed.

[0013] Optionally, the outer surface of the blood collection tube sleeve is provided with an anti-skid structure.

[0014] Optionally, the anti-skid structure is a strip-shaped anti-skid convex rib distributed circumferentially along the outer surface of the blood collection tube sleeve.

[0015] Optionally, the outer periphery of the bottom of the blood collection tube sleeve is provided with a holding portion protruding outward.

[0016] Optionally, the holding portion is a symmetrically distributed double-wing.

[0017] From the above technical solutions, it can be seen that the present application has the following advantages: the variable pitch needle holder device adopts a variable pitch internal thread, and the pitch of the variable pitch internal thread gradually increases from top to bottom along the axial direction, so that the blood collection needle fixing seat can be tightly and stably threadedly connected with blood collection needles of various specifications, thereby effectively matching blood collection needles of different manufacturers, and greatly improving the applicability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view of the variable pitch needle holder device in the embodiment of the present application;

[0019] Figure 2 is a sectional view of the variable pitch needle holder device in the embodiment of the present application;

[0020] Figure 3 is a top view of the variable pitch needle holder device in the embodiment of the present application;

[0021] Figure 4 is a detailed enlarged view of the variable pitch internal thread in the embodiment of the present application;

[0022] Figure 5 is a use schematic view of the variable pitch needle holder device in the embodiment of the present application;

[0023] Among them, the reference signs are:

[0024] 1-blood collection tube sleeve, 11-strip-shaped anti-skid convex rib, 12-holding portion, 2-blood collection needle fixing seat, 21-variable pitch internal thread, 3-blood collection needle, 4-blood collection tube. DETAILED DESCRIPTION

[0025] In order to enable a person skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For a person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The present application provides an embodiment of a variable pitch needle holder device, please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 .

[0029] The variable pitch needle holder device in the embodiment comprises a blood collection tube sleeve 1 and a blood collection needle fixing seat 2 arranged at the top end of the blood collection tube sleeve 1. The inner wall of the blood collection needle fixing seat 2 is provided with a variable pitch internal thread 21. The pitch of the variable pitch internal thread 21 gradually increases from top to bottom along the axial direction, so that the blood collection needle fixing seat 2 can realize close and stable thread cooperation with blood collection needles 3 of various specifications.

[0030] It should be noted that: the variable pitch needle holder device adopts the variable pitch internal thread 21, and the pitch of the variable pitch internal thread 21 gradually increases from top to bottom along the axial direction, so that the blood collection needle fixing seat 2 can realize close and stable thread cooperation with blood collection needles 3 of various specifications, thereby effectively matching blood collection needles 3 of different manufacturers, greatly improving the applicability of the product.

[0031] The above is an embodiment of the variable-pitch needle holder device provided in the present application. The following is an embodiment of the variable-pitch needle holder device provided in the present application. For details, please refer to Figures 1 to 5 .

[0032] The variable-pitch needle holder device in the present embodiment comprises a blood collection tube sleeve 1 and a blood collection needle fixing seat 2 arranged at the top end of the blood collection tube sleeve 1. The inner wall of the blood collection needle fixing seat 2 is provided with a variable-pitch internal thread 21. The pitch of the variable-pitch internal thread 21 gradually increases from top to bottom along the axial direction, so that the blood collection needle fixing seat 2 can be tightly and stably screwed with blood collection needles 3 of various specifications.

[0033] Specifically, the pitch of the variable-pitch internal thread 21 linearly increases from top to bottom along the axial direction, and the minimum pitch (i.e. the pitch at the inlet) of the variable-pitch internal thread 21 is 2.5 mm, and the maximum pitch (i.e. the pitch at the tail end) is 3 mm.

[0034] It can be understood that the inner diameter of the blood collection tube sleeve 1 is greater than the diameter of the commonly used blood collection tube 4 on the market, so as to facilitate assembly. Specifically, the minimum inner diameter of the blood collection tube sleeve 1 is 18-18.5 mm.

[0035] The surface of the variable-pitch internal thread 21 can be wrapped with an elastic adaptation layer for compensating for the difference in thread tooth profile of different blood collection needles 3. Specifically, the material of the elastic adaptation layer can be a silicone or thermoplastic elastomer (TPE) material with a Shore A hardness of 30-50.

[0036] The surface of the elastic adaptation layer can be provided with micron-level anti-slip lines.

[0037] The tooth profile of the variable-pitch internal thread 21 can be trapezoidal, triangular or rectangular.

[0038] The blood collection tube sleeve 1 and the blood collection needle fixing seat 2 are integrally formed.

[0039] The outer surface of the blood collection tube sleeve 1 is provided with an anti-slip structure to enhance the stability of holding, so that it is more convenient to rotate when installing the blood collection needle 3. Specifically, the anti-slip structure can be a strip-shaped anti-slip ridge 11 distributed circumferentially along the outer surface of the blood collection tube sleeve 1.

[0040] The bottom outer periphery of the blood collection tube sleeve 1 is provided with a holding portion 12 protruding from the outer periphery. Specifically, the holding portion 12 can be a pair of wings symmetrically distributed, which is used to provide a force application fulcrum to assist holding or screwing operation.

[0041] The materials of the blood collection tube sleeve 1 and the blood collection needle fixing seat 2 can both be medical-grade polypropylene (PP) or polycarbonate (PC).

[0042] In the implementation, the blood collection tube sleeve 1 is held, and the blood collection needle 3 is rotatably installed on the blood collection needle fixing seat 2. Since the inner wall of the blood collection needle fixing seat 2 is provided with the variable pitch internal thread 21 (the pitch of the variable pitch internal thread 21 gradually increases from top to bottom along the axial direction), the blood collection needle 3 is more and more tightly installed in the process of rotation, and after being installed in place, the blood collection needle 3 pierces into the human body vein. When the blood enters the pipeline of the blood collection needle 3, the blood collection tube 4 is taken out, the double wings on the needle holder device are held by the index finger and the middle finger, the big thumb presses the bottom of the blood collection tube 4, and the blood collection tube 4 is vertically pushed into the blood collection tube sleeve 1. Since the inside of the blood collection tube 4 is in a vacuum state, the blood will automatically flow into the blood collection tube 4, that is, the blood collection process is completed.

[0043] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A variable pitch needle holder device, characterized by, The application relates to a blood collection tube sleeve and a blood collection needle fixing base arranged at the top end of the blood collection tube sleeve. An inner wall of the blood collection needle fixing base is provided with a variable-pitch internal thread. The variable-pitch internal thread is gradually increased in pitch from top to bottom along the axial direction, so that the blood collection needle fixing base can be tightly and stably screwed with blood collection needles of different specifications. The variable-pitch internal thread is linearly increased in pitch from top to bottom along the axial direction, and the minimum pitch of the variable-pitch internal thread is 2.5 mm and the maximum pitch is 3 mm.

2. The variable pitch needle holder device of claim 1, wherein, The surface of the variable-pitch internal thread is wrapped with an elastic adaptive layer for compensating for the difference in thread tooth type of different blood collection needles.

3. The variable pitch needle holder device of claim 1, wherein, The material of the elastic adaptive layer is silica gel or thermoplastic elastomer material.

4. The variable pitch needle holder device of claim 3, wherein, The thread type of the variable-pitch internal thread is trapezoidal, triangular or rectangular.

5. The variable pitch needle holder device of claim 1, wherein, The blood collection tube sleeve and the blood collection needle fixing base are integrally formed.

6. The variable pitch needle holder device of claim 1, wherein, The outer surface of the blood collection tube sleeve is provided with an anti-skid structure.

7. The variable pitch needle holder device of claim 1, wherein, The anti-skid structure is a strip-shaped anti-skid convex rib distributed in the circumferential direction of the outer surface of the blood collection tube sleeve.

8. The variable pitch needle holder device of claim 7, wherein, The outer periphery of the bottom of the blood collection tube sleeve is provided with a holding part protruding outward.

9. The variable pitch needle holder device of claim 1, wherein, The holding part is a symmetrically-distributed double-wing.

10. The variable pitch needle holder device of claim 9, wherein, ​

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