JP2001202936A - Structure of cattery box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a battery box, which reinforces weld strength at hem of an opening of the battery box to improve its integral strength with no apprehensions of separation of the weldingly fixed hems of the opening by any cause. SOLUTION: The battery box comprises an upper lid having structure, capable of mechanically and electrically fitting to a portable electronic device and containing a secondary battery, a lower lid covering the opening of the upper lid, and a welding joint part which joins the upper lid and the lower lid with welding inside of the hem, where the lids are welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery box having a built-in rechargeable battery such as a lithium battery or a nickel-metal hydride battery, which is mounted on a portable electronic device such as a portable telephone for wireless communication. Regarding the structure.

[0002]

2. Description of the Related Art In recent years, portable electronic devices, for example, mobile phones have been desired by users as a whole to be thin, lightweight, and compact, and these tendencies have been further strengthened. These portable electronic devices use rechargeable batteries (eg, lithium batteries, nickel-metal hydride batteries), and these batteries can be used in either the upper or lower lid of the battery box if necessary. Together with the wires. After the storage, the upper lid and the lower lid are welded to their respective opening edges by ultrasonic welding means to produce a battery box.

[0003] The battery box manufactured in this way is relatively strong in terms of strength, but the welded portion may peel off for some reason, and sometimes the welding is partially insufficient. May be. If the welding is partially insufficient, the overall strength of the battery box is reduced, which is inconvenient. For this reason, it was considered to increase the width of the opening edge to secure a wide welded portion, but the appearance of the battery box was bad at the welded portion, and the result that the welding could be sufficiently expected could not be obtained. Was something.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an upper cover housing a secondary battery in a structure that can be mechanically and electrically coupled to a portable electronic device, and an opening portion of the upper cover. By providing a lower lid to cover, and a welding portion for welding the upper lid and the lower lid inside the periphery of the opening for welding the upper lid and the lower lid, the welding strength of the peripheral edge of the opening of the battery box. It is intended to provide a structure of a battery box in which the strength is improved as a whole, and therefore, there is no fear that the periphery of the welded opening is peeled off for some reason.

[0005]

Means for solving the problems of the present invention are: an upper cover housing a secondary battery in a structure capable of being mechanically and electrically coupled to a portable electronic device; and an opening of the upper cover. A battery box structure comprising: a lower lid that covers a portion; and a welding portion that welds the upper lid and the lower lid inside an opening periphery that welds the upper lid and the lower lid. It is.

[0006]

A welding portion made of an upper lid welding material and a lower lid welding material is provided inside the periphery where both the upper lid and the lower lid constituting the battery box are opened, and this welding portion is welded to the opening peripheral edge. Welding at the same time as welding, thereby strengthening the welding inconvenience at the periphery of the opening in advance, so that the opening periphery does not peel off for any reason, so as to strengthen the structure of the entire battery box Can be done.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1, 2 and 3. 1 is a perspective view of a battery box, FIG. 2 is an expanded view of FIG. 1, and FIG. 3 is an enlarged sectional view of a main part of FIG. Reference numeral 1 denotes a plastic rectangular lower cover, in which a lower battery 1 containing a lithium battery or a nickel hydrogen battery is stored. The peripheral edge of the opening of the lower cover 1 is, for example, ultrasonically welded by an upper cover 3 having a similar shape to the lower cover 1. The lower lid 1 houses a protection circuit together with a battery as needed.

An upper lid welding material 4 and a lower lid welding material 5 are formed inside the peripheral edges of the openings of the upper lid 3 and the lower lid 1. The two welding materials 4 and 5 are combined so that they are sandwiched as shown in the cross section in FIG. 3, and the two are closely combined. When the upper and lower lids 1 and 3 are rectangular at the opening, the upper lid welding material 4 and the lower lid welding material 5 are reinforced by strengthening the long side, that is, the long side is particularly easy to bend. It also has a personal role.

Then, the peripheral edge of the opening of the upper lid 3 is superimposed on the peripheral edge of the opening of the lower lid 1, and at the same time, the lower lid welding material 5 is also superposed on the upper lid welding material 4 in the same manner. Apply sonic welding. As a result, the peripheral edges of the openings of the lids 1 and 3 and the upper lid welding material 4 and the lower lid welding material 5 are welded, and a portion where the welding at the peripheral edges of the opening is assumed to be weak can be strengthened in advance. It can be made structurally strong. In this embodiment, the upper lid and the lower lid welding material are respectively provided in the long side portion.However, it is needless to say that the short side portion may be provided, and the long side and the short side may be combined. Any number may be provided and may be appropriately selected as needed. Further, the combination structure of the upper lid welding material 4 and the lower lid welding material 5 is combined in a comb shape, but is not limited to this, and may be a simple butting structure. In that case, of course, the size of the periphery of the opening is adjusted.

[0010]

As described above, the present invention provides an upper lid body having a structure capable of being mechanically and electrically coupled to a portable electronic device and containing a secondary battery therein, and a lower lid for covering an opening of the upper lid. A lid and a welding portion for welding the upper lid and the lower lid are provided inside the periphery of the opening for fusing the upper lid and the lower lid, so that the periphery of the opening of the upper lid and the lower lid is weakly welded. Part can be strengthened,
Therefore, there is no concern that the welded portion is peeled off by any external force, and the structure of the entire battery box becomes strong.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an embodiment of the present invention.

FIG. 2 is a developed perspective view of FIG.

FIG. 3 is an enlarged sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower lid 2 Battery 3 Upper lid 4 Upper lid welding material 5 Lower lid welding material

Claims (6)

[Claims] 1. An upper cover housing a secondary battery in a structure that can be mechanically and electrically coupled to a portable electronic device, a lower cover for covering an opening of the upper cover, and an upper cover and a lower cover. And a welding portion for welding the upper lid and the lower lid inside the periphery of the opening for welding the lid. 2. A rectangular upper lid body having a structure capable of being mechanically and electrically coupled to a portable electronic device and containing a secondary battery therein; a rectangular lower lid for covering an opening of the upper lid; A structure of a battery box, comprising a welding portion for welding the upper lid and the lower lid inside the periphery of the opening for the welding lid corresponding to the long sides of the upper lid and the lower lid. 3. A rectangular upper lid housing a secondary battery in a structure capable of being mechanically and electrically coupled to a portable electronic device, a rectangular lower lid covering an opening of the upper lid, A structure of a battery box, comprising a welding portion for welding the upper lid and the lower lid inside the periphery of the opening for the welding lid corresponding to the short sides of the upper lid and the lower lid. 4. A rectangular upper lid housing a secondary battery in a structure that can be mechanically and electrically coupled to a portable electronic device, a rectangular lower lid for covering an opening of the upper lid, A battery box characterized by comprising a welding portion for welding the upper lid and the lower lid inside the periphery of the opening for the welding lid corresponding to the short side and the long side of the upper lid and the lower lid. Construction. 5. The apparatus according to claim 1, wherein said upper lid welding material and said lower lid welding material constituting said welded portion are combined in a comb-like shape. 5. The structure of the battery box according to item 4. 6. A structure according to claim 1, wherein said upper lid welding material and said lower lid welding material constituting said welded portion have a simple butting structure. The structure of the battery box according to claim 4.