JPH0542739Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a case for storing precision equipment such as a video camera and various electronic equipment.

[Prior Art] Conventional cases that can house and carry video cameras are made of metal, leather, etc.
In order to manufacture a lighter case with lower manufacturing costs, we use foamed resin (urethane foam), etc.
It is being considered to manufacture the case by integral molding. Manufacturing cases using this type of molding is
Compared to conventional case manufacturing using stitching, the manufacturing process can be omitted, resulting in lower manufacturing costs. Furthermore, the foamed resin itself is not only inexpensive, but also lightweight and has excellent impact resistance.

[Problems to be solved by the invention] However, molding using such urethane resin has a problem in that air pockets are likely to occur.
This also limits the design of the case. Furthermore, since the surface of urethane resin is rough, there is a problem in that even if the resin is colored, the color and luster will be dull.

This invention was made in view of the above conventional example,
To provide a case that is easy to manufacture, has low manufacturing cost, is lightweight, has excellent impact resistance, has a degree of freedom in design, and has a glossy color.

[Means for Solving the Problems] In order to achieve the above object, the case of the present invention has the following configuration. That is, the skin part 20 is formed into a bag shape having the external appearance of a case by molding resin into a hollow part in a mold, and the hollow part of the skin part 20 in the mold has approximately the same thickness. Injected two-component urethane resin 2
1, and a lid 11 attached to the case wall.

[Function] In the above configuration, the outer skin part having the external shape of the case is formed into a bag shape by molding resin into a hollow part in a mold, and two injected resins are injected into the hollow part to have almost the same thickness. The wall of the case is made of liquid urethane resin 21. Furthermore, a case is formed by attaching a lid to this wall.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an external perspective view of the case of the embodiment.
In the figure, 10 is a case body, and 11 is a lid portion of the case 10, which is adhesively fixed to the main body 10 by adhesive or stitching. The skin portion 20 of the case body 10 is made of resin such as vinyl chloride (PVC) or elastomer, and is manufactured by slush molding, blow molding, or rotational molding to form the external shape of the case 10.

FIG. 2 is a sectional view taken along line A-A' in FIG.

Here, 21 is a foamed resin injected into the hollow part of the skin part 20 formed into a hollow shape, and in this embodiment, a two-component urethane resin is used. In this way, the foamed resin 21 is injected into the hollow part of the skin part 20 so that the cross sections of the frame part of the case 10 have approximately the same thickness.

Using slush molding as an example, to explain the manufacturing method of the case of the example, first, plastic sol (PVC) is attached to the inside of the mold that forms the shape of the case 10, and is melted and gelled and cooled. Act on the epidermis 20. The thickness of this skin portion 20 can be changed by adjusting the preheating temperature and preheating time of the mold. That is, the higher the preheat temperature or the longer the preheat time, the thicker the gelled layer becomes, and the thicker the skin portion 20 becomes.

In the next step, the preheated mold is turned over and the ungelled sol is discharged. After thoroughly draining, the mold is transported to a heating furnace, where the semi-gel film adhering to the wall of the mold is heated and melted. After being completely gelled and melted in this way, the mold is sent to a cooling process where it is cooled and solidified.

Once the skin portion 20 is formed hollow in this way, a foamed resin 21 such as a two-component urethane resin, for example, is injected into the hollow portion. The reason why foamed resin is used here is that urethane has excellent impact resistance and is inexpensive. When the injected foamed resin is cooled and the product is removed from the mold, the main part of the case has been formed.

After this, attach the lid part 11 as necessary,
Alternatively, a hanging cord or the like may be attached.

As explained above, in the case of this embodiment, the outer skin part that makes up the external shape is made of resin such as PVC, and foamed resin is injected inside the outer skin part. This has the effect of preventing chipping due to accumulation and reducing the defective rate of products. In addition, the degree of freedom in case design increases, allowing you to create a case with the design of your choice.

In addition, since the skin part is made of vinyl etc.
Cases with good gloss and color can be manufactured.

[Effects of the invention] As explained above, according to the invention, it is possible to provide a case with excellent impact resistance and low manufacturing cost.Furthermore, the manufacturing defect rate of the product is reduced, and there is greater freedom in design, color, etc. There is an effect that cases with increased number of cases can provide.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of the case of the embodiment, and FIG. 2 is a sectional view taken along line A-A' of the case of FIG. In the figure, 10... Case body, 11... Lid part, 2
0... Skin part, 21... Foamed resin.

Claims (1)

[Claims for Utility Model Registration] (1) A skin part 20 formed into a bag shape having the external shape of a case by molding resin into a hollow part in a mold, and a hollow part of the skin part 20 in the mold. A case wall portion composed of a two-component urethane resin 21 injected so as to have approximately the same thickness in each portion, and a lid portion 11 attached to the case wall portion.
A case characterized by having and. (2) The case according to claim 1, wherein the skin portion 20 is manufactured from vinyl chloride or elastomer resin by slush molding, blow molding, or rotational molding.