CN219517421U - Special-shaped rubber plug - Google Patents

Abstract

The special-shaped rubber plug comprises a rubber plug body, wherein the top of the rubber plug body is provided with a conical plug cap, the rubber plug body is provided with a rubber plug cavity through which a push rod penetrates, the outer wall surface of the rubber plug body is provided with three or more outer edges, the outer edges are of an inclined surface structure, a transition cylindrical surface is arranged between the conical plug cap and the adjacent outer edges and between the outer edges, the bottommost outer edge is provided with a bottom cylindrical surface in a downward extending mode, and a groove is formed between the outer edge and the transition cylindrical surface. According to the utility model, the outer edge can be easily compressed and deformed through the groove, so that a good sealing effect is realized in a relatively large range. Due to the effect of the grooves, the rubber plug can keep lower interference with the syringe needle cylinder while achieving good sealing effect, so that lower starting force and sliding force are achieved.

Description

Special-shaped rubber plug

Technical Field

The utility model belongs to the technical field of medical injector sealing, and particularly relates to a special-shaped rubber plug.

Background

The existing medical syringe rubber plug is mature in the existing range, but in new products, such as pre-filled and sealed syringes and non-glass pre-filled and sealed syringes, the situation that the starting force and sliding force are too large is easy to occur in the field of non-application.

In order to ensure the sealing effect, the existing standard component rubber plug has enough interference and has no problem when being matched with glass for use. However, when the glass-plastic composite material is matched with a non-glass material, such as a plastic material of PP, PC and the like, the conditions of overlarge starting force and sliding force are easy to occur.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the special-shaped rubber plug with good sealing effect and relatively low starting force and sliding force.

The technical scheme adopted by the utility model is as follows:

the special-shaped rubber plug comprises a rubber plug body, wherein the top of the rubber plug body is provided with a conical plug cap, and the rubber plug body is provided with a rubber plug cavity through which a push rod penetrates, and is characterized in that: the outer wall surface of plug body has three and above outer fringe, the outer fringe is the inclined plane structure, be equipped with the transition face of cylinder between toper cock cap and the adjacent outer fringe, between outer fringe and the outer fringe, the outer fringe downwardly extending of bottommost is provided with the bottom face of cylinder, form the recess between outer fringe and the transition face of cylinder. According to the utility model, the outer edge can be easily compressed and deformed through the groove, so that a good sealing effect is realized in a relatively large range. Due to the effect of the grooves, the rubber plug can keep lower interference with the syringe needle cylinder while achieving good sealing effect, so that lower starting force and sliding force are achieved.

Further, the grooves are V-shaped structures.

Further, the height of the transition cylindrical surface between the conical plug cap and the adjacent outer edge is smaller than the height of the transition cylindrical surface between the outer edges.

Further, the height of the transition cylindrical surface between the outer edges is consistent with the height of the bottom cylindrical surface.

Further, the length of the outer rims is greater than the height of the transition cylinder between the outer rims.

Further, the rubber plug cavity comprises a cylindrical cavity and a conical cavity arranged at the top of the cylindrical cavity.

Further, the cylindrical cavity extends from the bottom of the rubber plug body to the outer edge of the top.

Further, the outward end of the outer rim is arcuate in configuration.

Further, the rubber plug body is of an integral structure.

Further, the sealing rubber plug body can be made of silica gel, nitrile rubber, fluororubber or butyl rubber.

The utility model has the beneficial effects that: the sealing device has good sealing performance, and relatively low starting force and sliding force are realized.

Drawings

Fig. 1 is an overall view of the present utility model.

Fig. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a schematic diagram of the application of the present utility model.

In the figure: 1. prefilled with the drug, in a liquid state; 2. the syringe needle cylinder is made of non-glass materials; 3. the rubber plug comprises a rubber plug body, 31, a groove, 32, an outer edge, 33, a conical plug cap, 34, a rubber plug cavity, 341, a cylindrical cavity, 342, a conical cavity, 35, a transition cylindrical surface, 36 and a bottom cylindrical surface; 4. a syringe push rod.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples, without limiting the utility model to these specific embodiments. It will be appreciated by those skilled in the art that the utility model encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 1 and 2, this embodiment provides a special-shaped rubber plug, including a rubber plug body 3, the top of the rubber plug body 3 is a conical plug cap 33, the rubber plug body 3 has a rubber plug cavity 34 through which a push rod passes, the outer wall surface of the rubber plug body 1 has three or more outer edges 32, the outer edges 32 are of an inclined structure, a transition cylindrical surface 35 is arranged between the conical plug cap 33 and the adjacent outer edges 32, between the outer edges 32 and the outer edges 32, a bottom cylindrical surface 36 is arranged in a downward extending manner of the bottommost outer edges 32, and a groove 31 is formed between the outer edges 32 and the transition cylindrical surface 35. The utility model can easily compress and deform the outer edge 32 by the groove 31, thereby realizing good sealing effect in a larger range. Due to the effect of the grooves 31, the rubber plug can keep lower interference with the syringe needle cylinder while achieving good sealing effect, so that lower starting force and sliding force are achieved. The grooves 31 in this embodiment are V-shaped structures. Of course, the structure can also be U-shaped or semicircular. The outward end of the outer edge 32 is arc-shaped, so that smooth movement is ensured.

The height of the transition cylindrical surface 35 between the conical plug cap 33 and the adjacent outer edge 32 is smaller than the height of the transition cylindrical surface 35 between the outer edges 32. The height of the transition cylindrical surface 35 between the outer edges 35 corresponds to the height of the bottom cylindrical surface 36. The length of the outer rims 32 is greater than the height of the transition cylinder 35 between the outer rims 32.

The rubber plug cavity 34 in this embodiment includes a cylindrical cavity 341 and a tapered cavity 342 disposed at the top of the cylindrical cavity. The cylindrical cavity 341 extends from the bottom of the rubber plug body 3 to the outer edge of the top, so that the connection reliability of the injector push rod 4 is ensured.

The rubber plug body 3 in this embodiment is an integral structure. The sealing rubber plug body 3 can be made of silica gel, nitrile rubber, fluororubber or butyl rubber.

When the utility model is applied, the rubber plug body 3 is arranged at the head of the injector push rod 4, namely the head of the injector push rod 4 is connected with the rubber plug cavity 34, when the medicine 1 is in a sealed state, liquid has a downward movement trend relative to the rubber plug body 3, and the outer edge 32 of the rubber plug body 3 is propped up by the groove 31 structure in a microcosmic level, so that the rubber plug body 3 realizes a good sealing effect.

With this construction, the interference of the outer edge 32 of the stopper and the barrel 2 is achieved by the groove 31 and the downward movement tendency of the liquid medicine 1. The extrusion interference between the rubber plug and the needle cylinder is smaller than that of a conventional standard rubber plug. By the structure, the starting force and the sliding force of the injector in use are smaller than those of a conventional standard component rubber plug.

The utility model has good sealing performance and realizes lower starting force and sliding force.

Claims (10)

1. The special-shaped rubber plug comprises a rubber plug body (3), wherein the top of the rubber plug body (3) is provided with a conical plug cap (33), and the rubber plug body (3) is provided with a rubber plug cavity (34) penetrated by a push rod, and is characterized in that: the outer wall surface of plug body (3) has outer fringe (32) of three and more, outer fringe (32) are inclined plane structure, be equipped with transition cylindrical surface (35) between toper cock cap (33) and the adjacent outer fringe (32), between outer fringe (32) and outer fringe (32), bottom outer fringe (32) downwardly extending is provided with bottom cylindrical surface (36), form recess (31) between outer fringe (32) and transition cylindrical surface (35).

2. The shaped rubber plug of claim 1, wherein: the groove (31) is of a V-shaped structure.

3. The shaped rubber plug according to claim 1 or 2, wherein: the height of the transition cylindrical surface (35) between the conical plug cap (33) and the adjacent outer edge (32) is smaller than the height of the transition cylindrical surface (35) between the outer edges (32).

4. A shaped rubber plug according to claim 3, wherein: the height of the transition cylindrical surface (35) between the outer edges (32) is consistent with the height of the bottom cylindrical surface (36).

5. The shaped rubber plug of claim 4, wherein: the length of the outer rims (32) is greater than the height of the transition cylinder (35) between the outer rims (32).

6. The shaped rubber plug according to claim 1 or 2, wherein: the rubber plug cavity (34) comprises a cylindrical cavity (341) and a conical cavity (342) arranged at the top of the cylindrical cavity.

7. The shaped rubber plug of claim 6, wherein: the cylindrical cavity (341) extends from the bottom of the rubber plug body (3) to the position of the top outer edge (32).

8. The shaped rubber plug of claim 1, wherein: the outward end of the outer rim (32) is arcuate in configuration.

9. The shaped rubber plug of claim 1, wherein: the rubber plug body (3) is of an integrated structure.

10. The shaped rubber plug of claim 1, wherein: the rubber plug body (3) is made of silica gel, nitrile rubber, fluororubber or butyl rubber.