Needle head sealing cap suitable for insulin syringe

Abstract

The utility model relates to the technical field of syringes, and discloses a needle sealing cap suitable for an insulin syringe, which comprises a cap body, the front end of the cap body is provided with a front cavity for placing a syringe needle, the inner side wall of the front cavity and the outer side wall of the syringe needle are arranged at an interval, and the rear end of the cap body radially expands outwards to form an expansion ring. A rear cavity for placing the needle seat is formed in the expansion ring, the rear cavity is communicated with the front cavity, an elastically deformed clamping ring is arranged in the rear cavity, and the clamping ring is arranged in a surrounding manner in the circumferential direction of the rear cavity; the rear cavity is provided with a cavity opening for inserting a syringe needle at the rear end of the expansion ring; after the insulin syringe is used, the cap body is held by a hand, the injection needle is aligned with the cavity opening and inserted until the injection needle is completely arranged in the front cavity, the needle base can be clamped through the clamping ring in the expansion ring, so that the cap body and the needle base are fixed, the injection needle is effectively prevented from being punctured, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of syringe, specifically, relate to the needle head seal cap suitable for insulin syringe. BACKGROUND

[0002] Insulin is by the islet beta cell of pancreas endogenous or exogenous material such as glucose, lactose, ribose, arginine, glucagon etc. the stimulation and secretes a kind of protein hormone. Insulin is the only hormone in vivo reducing blood sugar, simultaneously promotes glycoprotein, fat, protein synthesis. Exogenous insulin is mainly used to treat diabetes.

[0003] In prior art, insulin is generally through insulin syringe, insulin syringe includes disposable needle seat 10, the front end of needle seat 10 is equipped with injection needle 20, by inserting injection needle 20 below the skin of patient, in the insulin injection into patient's body, after using, need to use seal cap to protect injection needle 20, avoid to hurt, cause unnecessary infection etc. however, since seal cap is usually long and thin, the insertion hole at bottom is smaller, when injection needle 20 is aligned and inserted into insertion hole, it is very easy to hurt finger, and its volume is smaller, is more light, if larger vibration occurs, seal cap and injection needle 20 can be disconnected between, connection is not stable enough. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing the needle head seal cap suitable for insulin syringe, aims at solving the unstable connection between seal cap and needle seat in prior art.

[0005] The utility model is realized as follows, the needle head seal cap suitable for insulin syringe, including cap body, the front end of cap body has the front cavity for the injection needle placement, the inside wall of front cavity and the outside wall of injection needle have interval arrangement between, the rear end of cap body is radially expanded and is formed with the expansion ring, the expansion ring has the rear cavity for the needle seat placement in, the rear cavity is linked with front cavity, the clamping ring of elastic deformation is equipped in the rear cavity, the clamping ring is along the circumferential arrangement of rear cavity;

[0006] The rear cavity forms the cavity opening for injection needle insertion at the rear end of expansion ring, the front cavity is columnar, the length of front cavity is greater than the length of injection needle;

[0007] When the injection needle is inserted into the front cavity through cavity opening, the clamping ring in the rear cavity clamps the needle seat, the cap body and needle seat are mutually fixed, the injection needle and the inside wall of front cavity are interval arrangement.

[0008] Further, the clamping ring is located in the cavity opening, and the outer side of the clamping ring is fixedly connected with the expansion ring of the cap body.

[0009] Further, the inner side of the clamping ring has an inner end face abutting against the needle seat, and a plurality of sealing rings are protruded on the inner end face and arranged in an arc shape, and the plurality of sealing rings are sequentially arranged along the longitudinal direction of the inner end face, and the plurality of sealing rings are in an integrated structure.

[0010] Further, the adjacent sealing rings are spaced to form a deformation area.

[0011] Further, a plurality of elastically deformed positioning strips are arranged in the rear cavity, the positioning strips are arranged in an arc shape, the plurality of positioning strips are arranged in a spaced manner along the circumferential direction of the rear cavity, and the positioning strips are arranged in a longitudinally opposite spaced manner with the clamping ring.

[0012] Further, the rear cavity forms a limiting end face limiting the continuous insertion of the injection needle at the front end of the expansion ring, and the positioning strips are located on the limiting end face and fixedly connected with the limiting end face.

[0013] Further, the bottom of the needle seat has an inwardly recessed inner recess ring arranged along the circumferential direction of the bottom of the needle seat.

[0014] When the injection needle is inserted into the front cavity through the cavity opening, the clamping ring in the rear cavity clamps the needle seat, the bottom of the needle seat abuts against the limiting end face, and the positioning strips abut against the inner recess ring.

[0015] Further, the front end of the front cavity is in a closed shape, and the rear end of the front cavity is in communication with the rear cavity.

[0016] Further, along the direction of the front cavity towards the rear cavity, the expansion ring is arranged in an outwardly inclined extension away from the rear cavity.

[0017] Further, the radial dimension of the rear cavity is greater than the radial dimension of the front cavity, the front cavity and the rear cavity are coaxially arranged in front and back, and the expansion ring is integrally formed with the cap body.

[0018] Compared with existing technologies, the needle cap provided by this utility model for insulin injectors allows for easy insertion of the injection needle after use. The needle is held by the cap and inserted into the lumen until it is fully inserted. The needle hub is held in place by the clamping ring in the expansion ring, effectively preventing needle punctures and improving safety. The lumen length is greater than the needle length to prevent needle exposure, and the rear end has a cylindrical insertion port for precise needle insertion. This design also solves the problem of unstable connection between the cap and the needle hub. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the needle cap for an insulin injector provided by this utility model;

[0020] Figure 2 This is a front view structural diagram of the hat body provided by this utility model;

[0021] Figure 3 This utility model provides Figure 2 Enlarged diagram of A in the middle;

[0022] Figure 4 This is a top view of the hat body provided by this utility model;

[0023] In the figure: cap body 10, injection needle 20, needle seat 30, front cavity 11, expansion ring 12, rear cavity 13, cavity opening 14, clamping ring 131, sealing ring 132, deformation area 133, positioning strip 134, limiting end face 135, concave ring 31. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0026] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the utility model, for those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0027] Referring to Figures 1-3 The preferred embodiment provided by the utility model is shown in the drawings.

[0028] The needle cap suitable for insulin injector comprises a cap body 10, the front end of the cap body 10 is provided with a front cavity 11 for placing an injection needle 20, the inner side wall of the front cavity 11 is arranged with a spacing from the outer side wall of the injection needle 20, the rear end of the cap body 10 is radially expanded to form an expansion ring 12, the expansion ring 12 is provided with a rear cavity 13 for placing a needle seat 30, the rear cavity 13 is communicated with the front cavity 11, and the rear cavity 13 is provided with an elastically deformed clamping ring 131, which is arranged along the circumference of the rear cavity 13;

[0029] The rear cavity 13 is formed with a cavity opening 14 at the rear end of the expansion ring 12 for inserting the injection needle 20, the front cavity 11 is columnar, and the length of the front cavity 11 is greater than the length of the injection needle 20;

[0030] When the injection needle 20 is inserted into the front cavity 11 through the cavity opening 14, the clamping ring 131 in the rear cavity 13 clamps the needle seat 30, the cap body 10 and the needle seat 30 are fixed with each other, and the injection needle 20 is arranged with a spacing from the inner side wall of the front cavity 11.

[0031] The needle cap suitable for insulin injector provided above, after using the insulin injector, the cap body 10 is held by hand, then the injection needle 20 is inserted into the cavity opening 14 until the injection needle 20 is completely placed in the front cavity 11, the clamping ring 131 in the expansion ring 12 can clamp the needle seat 30, so that the cap body 10 and the needle seat 30 are fixed, the safety in use is improved, the needle head is prevented from being exposed by the length of the cavity being greater than the length of the injection needle 20, the cavity opening at the rear end for inserting the injection needle 20 is columnar, so that the injection needle 20 can be accurately inserted, and the problem of unstable connection between the cap and the needle seat 30 is solved.

[0032] In the embodiment, the clamping ring 131 is located in the cavity opening 14, and the outer side of the clamping ring 131 is fixedly connected with the expansion ring 12 of the cap body 10, so that the structural strength of the clamping ring 131 and the cap body 10 is greater.

[0033] In the embodiment, the inner side of the clamping ring 131 has an inner end face abutting against the needle seat 30, and a plurality of sealing rings 132 are protruded on the inner end face, the sealing rings 132 are arranged in an arc shape, the plurality of sealing rings 132 are sequentially arranged along the longitudinal direction of the inner end face, and the plurality of sealing rings 132 are in an integrated structure, so that the sealing between the clamping ring 131 and the needle seat 30 is more tight, and the pollution spread of the injection needle 20 and the penetration risk are avoided.

[0034] In the embodiment, the deformation areas 133 are formed between the adjacent sealing rings 132, and the reserved deformation areas 133 can make the sealing rings 132 bear greater extrusion force as much as possible.

[0035] In the embodiment, a plurality of elastic deformation positioning strips 134 are arranged in the rear cavity 13, the positioning strips 134 are arranged in an arc shape, the plurality of positioning strips 134 are sequentially arranged along the circumferential direction of the rear cavity 13, and the positioning strips 134 are longitudinally and oppositely arranged apart from the clamping ring 131, so that the cap body 10 and the needle seat 30 can be quickly formed as a whole, the overall stability of the connection structure is improved, and the shaking of the connected structure is reduced.

[0036] In the embodiment, the rear cavity 13 forms a limiting end face 135 at the front end of the expansion ring 12 to limit the continuous insertion of the injection needle 20, and the positioning strips 134 are located on the limiting end face 135 and fixedly connected with the limiting end face 135, so that the injection needle 20 has an accurate limited length after being inserted, the deformation and damage of the injection needle 20 caused by excessive insertion are protected, and the shaking of the connected structure is reduced.

[0037] In the embodiment, the bottom of the needle seat 30 has an inner recess ring 31 formed by being inwardly recessed, and the inner recess ring 31 is arranged along the circumferential direction of the bottom of the needle seat 30.

[0038] When the injection needle 20 is inserted into the front cavity 11 through the cavity opening 14, the clamping ring 131 in the rear cavity 13 clamps the needle seat 30, the bottom of the needle seat 30 abuts against the limiting end face 135, and the positioning strips 134 abut against the inner recess ring 31, so that the direction vibration amplitude of the injection needle 20 and the needle seat 30 is limited, the injection needle 20 and the needle seat 30 are tightly fitted, and the whole is more compact.

[0039] In the embodiment, the front end of the front cavity 11 is in a closed shape, and the rear end of the front cavity 11 is connected with the rear cavity 13, so that the front end needle port of the injection needle 20 is not exposed and polluted after the injection needle 20 is inserted.

[0040] In the embodiment, the expansion ring 12 is arranged to extend outwardly and incline away from the rear cavity 13 in the direction of the front cavity 11 towards the rear cavity 13, so that the area of the expansion ring 12 is increased, and the clamping ring 131 in the expansion ring 12 can better clamp the needle seat 30, and the needle seat 30 is not prone to falling off.

[0041] In the embodiment, the radial dimension of the rear cavity 13 is greater than the radial dimension of the front cavity 11, the front cavity 11 and the rear cavity 13 are coaxially arranged, the expansion ring 12 is integrally formed with the cap body 10, and the direction of the injection needle 20 can be effectively and accurately controlled during injection operation. The integral forming simplifies the structure, reduces the volume, and lightens the weight.

[0042] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A needle cap suitable for insulin injectors, characterized in that, The device includes a cap body, the front end of which has a front cavity for placing an injection needle, the inner sidewall of which is spaced apart from the outer sidewall of the injection needle, and the rear end of which extends radially outward to form an expansion ring, the expansion ring having a rear cavity for placing a needle hub, the rear cavity communicating with the front cavity, and the rear cavity having an elastically deformable clamping ring arranged around the circumference of the rear cavity. The rear cavity has an opening at the rear end of the expansion ring for inserting an injection needle, and the front cavity is cylindrical with a length greater than the length of the injection needle. When the injection needle is inserted into the front cavity through the cavity opening, the clamping ring in the rear cavity clamps the needle seat, the cap and the needle seat are fixed to each other, and the injection needle is spaced apart from the inner wall of the front cavity.

2. The needle cap for an insulin injector as described in claim 1, characterized in that, The clamping ring is located in the cavity opening, and the outer side of the clamping ring is fixedly connected to the expansion ring of the cap body.

3. The needle cap for an insulin injector as described in claim 2, characterized in that, The clamping ring has an inner end face that abuts against the needle seat. Multiple sealing rings are protruding from the inner end face. The sealing rings are arranged in an arc shape and are arranged sequentially along the longitudinal direction of the inner end face. The multiple sealing rings are an integral structure.

4. The needle cap for an insulin injector as described in claim 3, characterized in that, Deformable regions are formed between adjacent sealing rings.

5. The needle cap for an insulin injector as described in any one of claims 1 to 4, characterized in that, The rear cavity is provided with multiple elastically deformable positioning strips, which are arranged in an arc shape and are spaced apart around the circumference of the rear cavity. The positioning strips and the clamping ring are arranged longitudinally at relative intervals.

6. The needle cap for an insulin injector as described in claim 5, characterized in that, The rear cavity has a limiting end face formed at the front end of the expansion ring to restrict the further insertion of the injection needle. The positioning strip is located on the limiting end face and is fixedly connected to the limiting end face.

7. The needle cap for an insulin injector as described in claim 6, characterized in that, The bottom of the needle holder has an inwardly recessed inner ring, which is arranged circumferentially around the bottom of the needle holder. When the injection needle is inserted into the front cavity through the cavity opening, the clamping ring in the rear cavity clamps the needle seat, the bottom of the needle seat abuts against the limiting end face, and the positioning strip abuts against the concave ring.

8. The needle cap for an insulin injector as described in any one of claims 1 to 4, characterized in that, The front end of the front cavity is closed, and the rear end of the front cavity is connected to the rear cavity.

9. The needle cap for an insulin injector as described in claim 8, characterized in that, Along the direction from the front cavity to the rear cavity, the extension ring extends outward at an angle away from the rear cavity.

10. The needle cap for an insulin injector as described in claim 9, characterized in that, The radial dimension of the rear cavity is larger than that of the front cavity, the front cavity and the rear cavity are arranged coaxially, and the expansion ring is integrally formed with the cap body.

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