Crown cap with magnet

Abstract

We offer reusable bottle caps with magnets that are safe, strong, and aesthetically pleasing, made by reusing used sake bottle caps as magnets. [Solution] The magnetic crown cap 1 of this invention involves polishing the edge of a used crown cap to remove sharp edges, and fitting a molded member 2 that conforms to the shape of the cap inside. A magnet 3 is embedded in the back surface of the member and exposed to the outside. Furthermore, by covering the polished edge and at least a part of the internal member with resin 4, safety and structural strength are enhanced, as well as the aesthetic appearance.

Description

Technical Field

[0001] The present invention relates to a magnet using a concave object such as a crown cap for Japanese sake, and particularly to a crown cap with a magnet manufactured by reusing used members.

Background Art

[0002] Generally, caps and crowns for beverages are discarded after the contents have been stored or collected as recyclable resources. In recent years, attempts have been made to reuse these caps in combination with magnets as holders for fixing notes or the like on steel surfaces such as lockers and refrigerators.

[0003] For example, a magnet in which a magnet is attached to a concave object such as a PET bottle cap is known. As such a magnet, Patent Document 1 discloses a configuration in which clay or resin is filled inside to hold the magnet.

Prior Art Documents

Patent Documents

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the magnet in Patent Document 1 described above, the accuracy and durability of the magnet position depend on the molding state of the clay or resin, and the safe use of a crown cap having sharp edges is not considered.

[0005] The present invention has been made in view of the above circumstances, and its main object is to enable safe reuse of used crown caps, to have sufficient strength to withstand the attachment and detachment operation of the magnet, and to provide a crown cap with a magnet having excellent aesthetics.

Means for Solving the Problems

[0006] To achieve the above objective, this invention comprises a used sake bottle cap, a component fitted inside the cap, and a magnet. The edges of the bottle cap are polished to remove any sharp edges. The internal component is fixed in place with a shape that conforms to the internal space of the cap, and a magnet embedded on its back surface is exposed to the outside. Furthermore, the edges of the cap and at least a portion of the internal component are coated with resin. [Effects of the Invention]

[0007] According to this invention, the edge of the crown cap is polished and further coated with resin, significantly improving safety during use. In addition, since the magnet is fixed via a component that fits the internal space and reinforced with resin, sufficient strength is obtained to withstand repeated attachment and detachment operations.

[0008] Furthermore, as an "upcycled" product that enhances the value of bottle caps that would otherwise be discarded, it contributes to achieving the SDGs (Sustainable Development Goals), and its unique luster due to the resin coating improves its design (aesthetics). [Brief explanation of the drawing]

[0009] [Figure 1] A rear view of the entire invention showing one embodiment. [Figure 2] A longitudinal cross-sectional view of the present invention. [Figure 3] A side view of the present invention. [Figure 4] A surface perspective view of the present invention. [Modes for carrying out the invention]

[0010] The magnetic crown cap of this invention consists of a metal crown cap that serves as the base material, a support member placed inside it, and a magnet that serves as a permanent magnet. The crown cap is a used one that is reused, but its edge (skirt portion) is smoothed using a polishing method such as a file.

[0011] The component fitted inside the crown cap has a three-dimensional shape that matches the inner circumference of the cap and is fixed in place by adhesive or fitting. A magnet is pre-embedded on the back surface (adsorption side) of this component. The magnet is held in a position exposed from the surface of the component to ensure adhesion to steel surfaces.

[0012] Finally, liquid resin (curable resin) is applied from the polished edge of the cap to the internal components and allowed to harden. This simultaneously protects the edge and improves the fixing strength of the components, creating a unified appearance. [Explanation of symbols]

[0013] 1 Crown Cap 2 Internal components 3 Magnets 4. Resin coating layer 5. Adhesive

Claims

1. A magnetic crown cap comprising a used sake bottle cap, a molded member fitted inside the crown cap, and a magnet embedded in the back surface of the molded member, wherein the edge of the crown cap has been polished to remove any sharp edges, the molded member has an outer shape corresponding to the internal space of the crown cap and is fitted and held inside, the magnet is embedded in the back surface of the molded member and is arranged to be exposed on the outside of the crown cap, and at least a portion of the edge of the crown cap and the molded member is covered with resin.

2. The crown cap with magnet according to claim 1, wherein the resin covers the polished edge of the crown cap to form a rounded outer circumference.

3. The crown cap with magnet according to claim 1 or 2, wherein the molded member is fixed to the crown cap by the resin.

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