Cover

Abstract

To provide a lid which can avoid forced pull-up at the time of molding a resin and, as a consequence, can improve a yield by reducing a defective molded product.SOLUTION: A lid 100 comprises a lid part 110 which is made of an elastic material and seals a mouth 102a of a container 102, a lip 120 which is engaged with a groove 102c formed on an outer periphery of the mouth 102a of the container 102, and a pillar part 130 which connects between the lid part 110 and the lip 120. The lip 120 has a projection 122 which protrudes toward the container 102 at places other than the pillar part 130. The lid part 110 and the lip 120 are separated from each other at the places other than the pillar part 130. An outer diameter of the lid part 110 and an inner diameter of the projection 122 are substantially equal at the places other than the pillar part 130.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lid attached to the mouth of a container.

Background Art

[0002] In a container constituting a pump through which a liquid flows, a lid for sealing the mouth may be attached to prevent leakage of the fluid. Although the applications are different, for example, Patent Document 1 discloses an easily openable plug-type resin cap as a lid for preventing fluid leakage.

[0003] The easily openable plug-type resin cap of Patent Document 1 is formed of a top plate portion 1 and a skirt portion 2 hanging down from the periphery of the top plate portion. On the inner surface of the top plate portion 1, an inner ring 11 that engages with the inner peripheral surface 32 of the container mouth portion to seal the container or an outer ring 12 that further engages with the outer peripheral surface 33 of the container mouth portion is formed. According to Patent Document 1, the cap height is suppressed to be low, the cap can be easily fastened to the container by plugging, it is excellent in tamper evidence, and it is also possible to easily open and reseal with a finger.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, with the shape of the easily openable plug-type resin cap of Patent Document 1, although the container can be sealed well, it is necessary to perform forced ejection during resin molding. Then, wear occurs when removing the molded product, and there is a problem that molding defects are likely to occur.

[0006] In view of such problems, an object of the present invention is to provide a lid that can avoid forced ejection during resin molding, reduce defective products, and improve the yield.

Means for Solving the Problems

[0007] In order to solve the above problems, a typical configuration of the lid according to the present invention is composed of an elastic material, and includes a lid portion for sealing the mouth of the container, a lip that engages with a groove formed on the outer periphery of the mouth of the container, and a pillar portion that connects the lid portion and the lip. The lip has a protruding portion that protrudes toward the container at a location other than the pillar portion. The lid portion and the lip are separated at locations other than the pillar portion, and the outer diameter of the lid portion and the inner diameter of the protruding portion are substantially equal at locations other than the pillar portion.

[0008] The lid portion may preferably be configured to include a top surface portion along the end surface of the mouth of the container and a fitting portion that fits into the inside of the mouth of the container.

Effects of the Invention

[0009] According to the present invention, it is possible to provide a lid that can avoid forced ejection during resin molding, reduce defective products, and improve the yield.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0011] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit redundant descriptions, and elements not directly related to the present invention are not shown.

[0012] FIG. 1 is a perspective view of the lid 100 of the present embodiment. FIG. 1(a) is a perspective view of the lid 100 observed from obliquely above, and FIG. 1(b) is a perspective view of the lid 100 observed from the front. FIG. 2 is an orthographic view of the lid 100 of the present embodiment. FIG. 3 is a partial cross-sectional view of the lid 100 in FIG. 1(a).

[0013] The lid 100 of the present embodiment shown in FIGS. 1 and 2 is made of an elastic material and is attached to the mouth 102a (see FIG. 3) of the container 102 to seal it. The lid 100 includes a lid portion 110, a lip 120, and a pillar portion 130.

[0014] The lid portion 110 is a part that seals the mouth 102a of the container 102 and has a top surface portion 112 and a fitting portion 114. The top surface portion 112 is along the end surface 102b of the mouth 102a of the container 102, and the fitting portion 114 fits inside the mouth 102a of the container 102. As shown in FIG. 3, by fitting the fitting portion 114 formed integrally with the top surface portion 112 inside the mouth 102a of the container 102, the mouth 102a of the container 102 is sealed.

[0015] The lip 120 is a portion that engages with a groove 102c formed on the outer periphery of the mouth 102a of the container 102. The column portion 130 is a portion that connects the lid portion 110 and the lip 120. And on the lip 120, a protruding portion 122 that protrudes toward the container 102 is formed at a location other than the column portion 130. Thus, as shown in FIG. 3, when the mating portion 114 of the lid portion 110 is mated with the mouth 102a of the container 102, the protruding portion 122 of the lip 120 is in a state of being engaged with the groove 102c of the container 102. Therefore, it is possible to suitably prevent the lid 100 from coming off when fluid passes through the container 102.

[0016] As a feature of the lid 100 of the present embodiment, the lid portion 110 and the lip 120 are separated at locations other than the column portion 130. And as shown in the plan view of FIG. 2, the outer diameter R1 of the lid portion 110 and the inner diameter R2 of the lip 120 are substantially equal at locations other than the column portion 130. Thereby, since the lid portion 110 and the protruding portion 122 of the lip 120 do not overlap in plan view, the molded lid 100 can be removed from a mold (not shown) without forced ejection. Therefore, it is possible to reduce defective products and improve the yield.

[0017] In other words, the necessary portion for locking the lid 100 to the container 102 is the protruding portion 122 of the lip 120. And a side wall (cylindrical portion) at a position overlapping the protruding portion 122 in plan view is cut out. In the circumferential direction, the protruding portion 122 is a part (two locations) in the circumferential direction, and the side wall remaining at the position where the protruding portion 122 is not present is the column portion 130.

[0018] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention.

Industrial Applicability

[0019] The present invention can be used as a lid attached to the mouth of a container.

Explanation of Reference Numerals

[0020] 100... lid, 102... container, 102a... mouth, 102b... end face, 102c... groove, 110... lid part, 112... top face part, 114... fitting part, 120... lip, 122... protruding part, 130... column part, 102d... side face

Claims

1. It is made of an elastic material, a lid portion for sealing the mouth of the container, a lip that engages with a groove formed on the outer periphery of the mouth of the container, and a pillar portion that connects the lid portion and the lip, wherein the lip has a protruding portion that protrudes toward the container at a location other than the pillar portion, the lid portion and the lip are spaced apart at locations other than the pillar portion, and the outer diameter of the lid portion and the inner diameter of the protruding portion are substantially equal at locations other than the pillar portion. A lid characterized by this.

2. The lid according to claim 1, wherein the lid portion includes a top surface portion along the end surface of the mouth of the container and a fitting portion that fits into the inside of the mouth of the container.

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