A single-opening pencil case with a snap-in structure.

Abstract

By developing a new method for joining the bottom of the inner tray to the pencil case cover, we provide a single-opening pencil case with a snap-fit ​​structure that maintains the conventional shape while allowing it to be joined to pencil case covers of any material. [Solution] By providing multiple protruding parts on the bottom of the inner tray 2 and corresponding recessed parts 6 on the pencil case cover 3, a different method of joining can be used than before. This makes it possible to use materials that could not be selected before, thus broadening the range of choices. The same effect can be obtained even if the recessed parts are provided on the bottom of the inner tray 2 and the protruding parts are provided on the pencil case cover 3.

Description

Technical Field

[0001] The present invention relates to the structure of a single-opening pen case, in which a plurality of protruding parts are provided at the bottom of an inner tray, and corresponding concave parts are provided on one side of a pen case cover on a plastic (PP) plate. Regarding the fitting parts, the same effect can be obtained by providing concave parts at the bottom of the inner tray and protruding parts on the plastic (PP) plate.

Background Art

[0002] The single-opening pen cases currently sold on the market mainly have the following two structures. ▲1▼ A case for storing stationery and the like is formed using a hard polyvinyl chloride (PVC) material, and only a lid is attached thereto. ▲2▼ It is composed of a plastic (PP) inner tray and a pen case cover in which a core ball is covered with a cover made of polyvinyl chloride (PVC) or the like. The reason why there was only such a structure was that no method for joining the outer bottom surface of the inner tray and the pen case cover other than heat treatment had been devised. Therefore, only limited materials such as soft plastic (PP) for the inner tray and polyvinyl chloride (PVC) for the pen case cover could be used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional methods of joining the inner tray and pencil case cover using heat treatment, the usable materials were limited, and the designs that could be produced were also restricted. By developing a joining method that does not require heat treatment, the aforementioned drawbacks are resolved, and the range of designs can be greatly expanded. [Means for solving the problem]

[0006] This invention solves the problems of limited material selection and design limitations associated with the aforementioned heat treatment joining method by enabling a new joining method in which multiple protruding parts are provided on the bottom of the inner tray and corresponding recesses are provided on the plastic (PP) plate used for the pencil case cover. [Effects of the Invention]

[0007] The single-opening pencil case using the structure of this invention employs a method for joining the bottom surface of the inner tray and the pencil case cover using a method other than heat treatment. This allows for the joining of the inner tray to pencil case covers made of various materials while maintaining the conventional shape in which the entire inner tray is covered by the pencil case cover. Furthermore, it enables the creation of designs that were not possible with certain materials, and is useful for producing products that meet current trends and needs. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view showing the structure of a single-opening pencil case according to one embodiment of the present invention. [Figure 2] This diagram shows the front and back of a plastic sheet. [Figure 3] This figure shows the joint surface on the bottom of the inner tray. [Modes for carrying out the invention]

[0009] First, instead of a core ball inserted into one side of the pencil case cover, a plastic (PP) plate is used. Next, multiple protruding parts are provided on the bottom of the inner tray, and corresponding recesses are made on the aforementioned plastic (PP) plate. By fitting the protruding parts of the inner tray into the recesses of the pencil case cover, it becomes possible to join the bottom of the inner tray and the pencil case cover. Note: The same effect can be achieved by placing multiple protruding parts on the plate ▲1▼ and corresponding multiple recesses on the bottom of the tray ▲2▼. [Examples]

[0010] An embodiment will be described below with reference to the attached drawings. 1 is the surface of the inner tray, and 2 is its bottom, which is provided with multiple protruding parts 5 necessary for this invention. 3 is a plastic (PP) plate used for the pencil case cover, and similarly, multiple recesses 6 are provided to correspond to the bottom of the inner tray 2, allowing them to be joined by fitting them together. This is just one example; similar effects can be obtained if the recesses 6 are provided on the bottom of the inner tray 2 and the protruding parts 5 are provided on the surface of the plastic (PP) plate 3. [Explanation of Symbols]

[0011] 1 Surface of inner plate 2 Bottom of medium plate 3. Surface of plastic (PP) plate 4. Plastic (PP) plate bottom 5. Protruding parts 6 recesses

Claims

[Claim 1] The inner tray has multiple protruding parts on its bottom, and corresponding recesses are also provided on a plastic (PP) plate that fits into one side of the pencil case cover. By fitting the protruding parts of the inner tray into the recesses of the pencil case cover, the two can be joined together, creating a single-opening pencil case structure. The same effect can be achieved by creating a recess in the bottom of the inner tray and a protruding part on a plastic (PP) plate for the parts that are inserted.

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