Luer lock protective cap structure

Abstract

The utility model discloses a Luer lock protective cap structure which comprises a protective cap body and a rubber plug which are matched with each other, a limiting cap is fixed at the upper end of the protective cap body, and a limiting part which abuts against the upper end face of the rubber plug is arranged on the limiting cap. Compared with the prior art, the Luer lock protective cap has the advantages that the Luer lock protective cap is simple and reasonable in structure and convenient to machine, axial limiting is carried out through the limiting part, so that the situation that the rubber plug axially displaces when the Luer lock protective cap is screwed into the clamping cap is avoided, the sealing performance of the Luer lock protective cap is guaranteed, and the sealing reliability of the Luer lock protective cap is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to luer lock cap manufacturing technical field, specifically a luer lock cap structure. BACKGROUND

[0002] The pre-filled syringe is widely used in medical industry, with the demand increasing, the safety is also increasingly concerned by people. The existing pre-filled syringe is mostly glass needle tube structure, the structure is connected with the hard plastic cap with internal thread in the cone head part of glass needle tube, and then the luer lock cap is connected to ensure the overall sterility.

[0003] The existing luer lock cap mainly includes cap body and rubber plug arranged in the cap body, wherein the rubber plug is a sealing part, for example, the patent application No. CN201720176809.9, a kind of pre-filled syringe luer lock cap is disclosed, which is composed of plastic sleeve and rubber plug, but the existing luer lock cap, when screwed into the cap, the rubber plug will move slightly in axial direction, resulting in that some luer lock caps are not sealed tightly, so the existing luer lock cap needs to be further improved. UTILITY MODEL CONTENT

[0004] The utility model aims at making up for the above-mentioned deficiencies, and discloses a luer lock cap structure which is simple in structure, reasonable, easy to process and assemble, and can effectively prevent the rubber plug from moving in axial direction when the luer lock cap is screwed in.

[0005] The technical scheme of the utility model is implemented as follows:

[0006] A luer lock cap structure includes a cap body and a rubber plug which are matched, the upper end of the cap body is fixed with a limiting cap, and the limiting cap is provided with a limiting part which abuts against the upper end surface of the rubber plug.

[0007] The measures for further optimizing the technical scheme are as follows:

[0008] As an improvement, the limiting part is a limiting ring.

[0009] As an improvement, the limiting part is a limiting boss.

[0010] As an improvement, the number of the limiting bosses is 5-10, and the limiting bosses are circular and uniformly distributed.

[0011] As an improvement, the limiting boss is a hemispherical structure.

[0012] As an improvement, the limiting cap is threadedly connected with the cap body. Threaded connection is simple and convenient to assemble.

[0013] As improvement, the limiting cap is fixedly buckled with the cap body, and the outer periphery of the cap body is provided with a buckling groove, and the limiting cap is provided with a buckling convex strip matched with the buckling groove.

[0014] As improvement, the outer wall of the cap body is uniformly provided with anti-skid convex blocks.

[0015] As improvement, the inner cavity wall of the rubber plug is a taper structure with small upper end and large lower end.

[0016] As improvement, the inner cavity center of the rubber plug is provided with a convex.

[0017] Compared with the prior art, the utility model has the advantages of:

[0018] The utility model discloses a luer lock cap structure, simple and reasonable structure, convenient to process, and through the limiting cap fixed in the upper end and the limiting part of the upper end surface of the rubber plug on the limiting cap, the axial position is limited through the limiting part, so that the axial displacement of the rubber plug when the luer lock cap is screwed into the cap is avoided, the sealing property of the luer lock cap is guaranteed, and the reliability of the sealing of the luer lock cap is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the stereogram of the utility model embodiment one;

[0020] Figure 2 It is the sectional structure drawing of the utility model embodiment one;

[0021] Figure 3 It is the explosion drawing of the utility model embodiment one;

[0022] Figure 4 It is the sectional structure drawing of the utility model embodiment two;

[0023] Figure 5 It is the explosion drawing of the utility model embodiment two.

[0024] The names of various reference signs in the drawings of the utility model are:

[0025] Cap body 1, buckling groove 1a, anti-skid convex block 11, rubber plug 2, inner cavity wall 2a, convex 21, limiting cap 3, buckling convex strip 31, limiting ring 4, limiting boss 5. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings:

[0027] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model 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, the above terms should not be construed as limitations on this utility model.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] Example 1, as Figures 1 to 3 As shown, a Luer lock cap structure includes a matching cap body 1 and a rubber plug 2. A limiting cap 3 is fixed to the upper end of the cap body 1, and a limiting part is provided on the limiting cap 3 that abuts against the upper end surface of the rubber plug 2.

[0031] In this embodiment, the limiting part is a limiting ring 4. The use of a ring structure for the limiting part allows it to contact the rubber stopper 2 on its circumferential surface, which improves the uniformity of force distribution.

[0032] The limiting cap 3 is threadedly connected to the cap body 1. This threaded connection is simple in structure and convenient to use. In this embodiment, the upper wall of the cap body 1 is provided with an external thread, and the limiting cap 3 is provided with a matching internal thread.

[0033] The outer wall of the cap body 1 is uniformly provided with anti-slip protrusions 11. The anti-slip protrusions 11 are provided to increase the friction of the outer wall of the cap body 1, so as to facilitate the application of force when turning the Luer lock cap.

[0034] The inner wall 2a of the rubber stopper 2 is a conical structure that is smaller at the top and larger at the bottom.

[0035] The inner cavity of the rubber plug 2 is centrally provided with a protrusion 21.

[0036] The center of the cap is provided with a center tube, and the center tube is provided with a center hole. The inner cavity wall 2a is in a conical structure, so that the rubber plug and the cap combination part are in linear contact, thereby ensuring the sealing performance. When the luer lock cap is screwed into place, the protrusion 21 blocks the outlet of the center hole, thereby ensuring the sealing performance.

[0037] In the second embodiment, as shown in Figure 4 and Figure 5 The structure of the second embodiment is similar to that of the first embodiment, except that the limiting part of the second embodiment is a limiting boss 5.

[0038] The number of the limiting boss 5 is 5-10, and the limiting boss 5 is circular and uniformly distributed. In this way, the uniformity of the force on the circumference is improved.

[0039] The limiting boss 5 is in a hemispherical structure.

[0040] The limiting cap 3 is fixedly connected with the cap body 1, the outer periphery of the cap body 1 is provided with a buckling groove 1a, and the limiting cap 3 is provided with a buckling convex strip 31 matched with the buckling groove 1a.

[0041] Of course, in the second embodiment, the fixing mode of the limiting cap 3 and the cap body 1 can also be screw connection; only the luer lock cap structure in the first embodiment can adopt the buckling structure in the second embodiment.

[0042] The luer lock cap structure of the utility model, through the limiting cap 3 fixed on the upper end of the cap body 1, and the limiting part on the limiting cap 3 abutting against the upper end surface of the rubber plug 2, the rubber plug 2 is axially limited by the limiting part, thereby avoiding the axial displacement of the rubber plug 2 when the luer lock cap is screwed into the cap, and improving the reliability of the luer lock cap sealing. Since the limiting cap 3 is connected with the cap body 1 after the rubber plug 2 is installed in the cap body 1, it will not affect the rubber plug 2 from being squeezed into the cap body 1 from top to bottom.

[0043] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A luer lock cap structure comprising a cap body (1) and a rubber plug (2) which are adapted to each other, characterized in that: The upper end of the cap body (1) is fixed with a limiting cap (3), and a limiting part is arranged on the limiting cap (3) and abuts against the upper end surface of the rubber plug (2).

2. The luer lock cap structure of claim 1, wherein: The limiting part is a limiting ring (4).

3. The luer lock cap structure of claim 1, wherein: The limiting part is a limiting boss (5).

4. The luer lock cap structure of claim 3, wherein: The number of the limiting boss (5) is 5-10, and the limiting boss (5) is circular and uniformly distributed.

5. The luer lock cap structure of claim 4, wherein: The limiting boss (5) is a hemispherical structure.

6. A luer lock cap structure according to any one of claims 2 to 5, wherein: The limiting cap (3) is threadedly connected with the cap body (1).

7. A luer lock cap structure according to any one of claims 2 to 5, wherein: The limiting cap (3) is fixedly connected with the cap body (1) through buckling, and the outer periphery of the cap body (1) is provided with a buckling groove (1a), and the limiting cap (3) is provided with a buckling convex strip (31) matched with the buckling groove (1a).

8. The luer lock cap structure of claim 1, wherein: The outer wall of the cap body (1) is uniformly provided with anti-skid convex blocks (11).

9. The luer lock cap structure of claim 8, wherein: The inner cavity wall (2a) of the rubber plug (2) is a tapered structure with a small upper end and a large lower end.

10. The luer lock cap structure of claim 9, wherein: A convex (21) is arranged in the center of the inner cavity of the rubber plug (2).

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