JP2001057186A - Lid-fitting structure of battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid-fitting structure of a battery pack capable of firmly connecting an open edge part of an upper lid to that of a lower lid in a small thickness in a single operation without using a means such as an adhesive or ultrasonic welding nor using any separate component. SOLUTION: This lid fitting structure of a battery pack comprises: a box- shaped first and second battery pack bodies either of which is formed into a structure, capable of receiving at least a battery inside and of being mounted to an electronic apparatus body, projecting parts 4 formed on the edge of: the second battery pack body connected to the first battery pack body with a laterally flexible direction set in the wall direction of the second battery pack body, each having an arrowhead-shaped part on its one side, and one-sidedly stepped recessed parts 5 connected to the projecting parts 4, formed on the edge of the first battery pack body, used for flexibly inserting and fixing the arrowhead-shaped parts of the projecting parts 4, and formed in the wall direction of the first battery pack body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid of a battery pack which is attached to, for example, an electronic apparatus main body and supplies power to the electronic apparatus main body, and more particularly to an improvement in a lid stacking structure suitable for a thin lid.

[0002]

2. Description of the Related Art In recent years, portable electronic devices such as portable telephones have been desired by users as a whole to be thin, lightweight, and compact, and these tendencies have been further strengthened. Such electronic devices employ a battery pack having a built-in rechargeable battery. This battery pack is made of a material such as plastic and is composed of an upper lid and a lower lid. Therefore, after the battery and / or the protection circuit are housed inside, the openings of the upper lid and the lower lid are adhered with an adhesive or fixed by ultrasonic welding.

Conventionally, the edge of the opening between the upper lid and the lower lid is flat, and an adhesive is applied to the flat part and combined with each other, so that the adhesive overflows onto the surface of the battery pack and impairs the appearance of the surface. I have. In addition, the bonding is not enough because the bonding is abutting with the flat surface. Therefore, a method that considers from the structural aspect of adopting an intaglio fitting structure on the edge portion, applying an adhesive to it, and bonding is used. However, since the upper and lower lids are simply bonded from the left and right at the edges, the battery pack itself is vulnerable to shocks from the left and right, and often breaks itself, which is not sufficient for aesthetics. Was.

[0004] For this reason, a combination of the upper lid and the lower lid with one touch without using an adhesive or ultrasonic welding has been considered, but it is structurally thick, and particularly a thin and lightweight battery pack. It goes against the tendency of the transition. Accordingly, there is a need for a battery pack lid overlapping structure in which the upper lid and the lower lid are combined and the two lids can be attached with one touch by being thin and relatively strong.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the thickness of the joining of the open edge portions of the upper lid and the lower lid without using any means such as an adhesive or ultrasonic welding, and without using another part. The present invention provides a battery pack lid structure that can be firmly connected with one touch.

[0006]

The first means for solving the problems of the present invention is a first box-shaped structure in which at least a battery is housed and which is configured to be attachable to an electronic device body.
And a second battery pack main body, and a left and right elastic direction formed on an edge of the second battery pack main body coupled to the first battery pack main body is set to a wall direction of the second battery pack main body. A convex part having an arrowhead-shaped part on one side, and the first part connected to this convex part and formed on an edge of the first battery pack main body, and the arrowhead-shaped part of the convex part is elastically inserted and fixed.
The second means is a box-shaped structure in which at least the battery is housed inside and which can be attached to the electronic device main body. The first and second battery pack main bodies, and the wall of the first battery pack main body formed on the edge of the first battery pack main body connected to the second battery pack main body and resilient to the left and right. A projection having an arrowhead-shaped portion on one side and an arrowhead-shaped portion connected to the projection and formed on an edge of the second battery pack main body and being elastically inserted and fixed; And a stepped recess on one side formed in a wall direction of the second battery pack main body.

[0007]

When the convex portion formed on the edge of the upper lid is inserted into the stepped concave portion formed on the edge of the lower lid from the mouth side of the concave portion, since the arrowhead-shaped portion of the convex portion has an elastic structure, pressure is reduced. While receiving, it enters the stepped concave portion on one side, and the tip of the arrowhead-shaped portion of the convex portion hooks at the stepped portion, so that it can be fixed so that it does not easily come off. In particular, since the connecting portion has elasticity, it always presses the arrowhead-shaped portion from the inside so that the connecting portion does not come out. Even if the projections and the recesses are thinned, they can be firmly overlapped at the overlapping portion of the two lids, so that there is no need for a means such as an adhesive or ultrasonic welding. Therefore, the number of assembly steps can be reduced and the cost can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings, FIGS. 1, 2 and 3. FIG. FIG. 1 is an assembled perspective view in which a plastic battery pack main body 1 is combined with an upper lid 2 and a lower lid 3. A convex portion 4 is formed at the opening edge of the battery pack main body 1 that opens to the lower side of the upper lid 2 as shown in FIGS. 2 and 3 (FIGS. 2 and 3 are enlarged views of the main part X of FIG. 1). In the sectional view, the wall of the portion where the upper lid 2 and the lower lid 3 are overlapped is sectioned in the vertical direction, that is, the wall direction.) On the other hand, a one-sided stepped concave portion 5 is formed at the opening edge of the lower lid 3.

That is, an arrowhead-shaped part 6 is formed on one side of the tip of the convex part 4, and this arrowhead-shaped part 6 is connected to a support 8 on the opposite side by a connecting part 7. Next, the one-sided stepped concave portion 5 has a stepped structure on one side and a flat surface on the opposite side. The dimension between the arrowhead-shaped portion 6 and the support column 8 is slightly longer than the opening of the stepped recess 5 on one side. Further, the length of the convex portion 4 in the depth direction of the one-side stepped concave portion 5 is sufficiently large.
Is set so that insertion can be completed. The convex portion 4 and the one-sided stepped concave portion 5 are formed in the walls of the upper lid 2 and the lower lid 3 in the wall direction. Therefore, the thickness of the convex portion 4 of the upper lid 2 and the thickness of the stepped concave portion 5 on one side of the lower lid 3 are only slightly thicker in the stepped concave portion 5, and all these structures are within the thickness of both lids. It is formed and stored in. The upper lid 2 and the lower lid 3 are reliably overlapped with each other by forming a plurality of the projections 4 and the one-sided stepped depressions 5 on the edge of the upper lid 2 and the lower lid 3 as one unit. Can be fixed.

FIG. 3 shows the convex portion 2 of FIG. 2 inserted into the one-sided stepped concave portion 5 from the direction of arrow A. When the insertion is completed, the corner of the arrowhead-shaped portion 6 is hooked at the wide portion of the one-sided stepped concave portion 5. 1
It becomes a structure that does not fall out by being hooked on 0. That is, since the convex portion 4 is inserted into the stepped concave portion 5 on one side and is not caught by the hook portion 10 at the deepest portion, and it is firmly connected, it does not easily come out with some external force. In this way, a unit of the convex portion 4 and the stepped concave portion 5 is configured.

Next, a series of operations when the convex portion 4 is inserted into the one-side stepped concave portion 5 will be described. Forcibly inserting the arrowhead-shaped portion 6 of the convex portion 4 into the one-side stepped concave portion 5 (that is, When the upper lid 2 is closed to the lower lid, the arrowhead-shaped portion 6 is pushed from the left and right, and the connecting portion 6 is elastically deformed and inserted into the opening of the one-sided stepped concave portion 5. When pushed further, arrowhead-shaped part 6
Enters the stepped recess 5 on one side and reaches the wide portion 9.

Then, since this portion is wide, the arrowhead-shaped portion 6 returns to its original position by the repulsive force of the connecting portion 7 and is caught by the stepped hooking portion 10 so that it cannot be pulled out. The upper cover 2 can be firmly fixed with one touch without using an adhesive or ultrasonic welding. In this case, the projections 4 are formed so that no gap is formed at the place where the upper lid 2 is fixed to the lower lid 3.
It goes without saying that the length of each part and the length of each part of the one-sided stepped recess 5 are appropriately adjusted and set. In the above embodiment, the example in which the convex portion 4 is formed on the upper lid 2 side and the one-sided stepped concave portion 5 is formed on the lower lid 3 side has been described. However, the reverse is also possible, and various modifications are possible. Of course.

[0013]

As described above, according to the present invention, a convex portion is formed on one side of the lid and a stepped concave portion is formed on the other side, and the convex portion and the single-sided stepped concave portion are thin and formed in the wall direction. The upper and lower lids do not become excessively thick at the combination of the upper and lower lids.Furthermore, there is no need for adhesive or ultrasonic welding, and the upper and lower lids can be fixed with one touch, and can be easily removed by any external force even after joining. Therefore, it is possible to provide a battery pack with a lid structure that is effective in reducing costs and at the same time.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part X of FIG.

FIG. 3 is an enlarged sectional view of a main part X of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery pack main body 2 Upper lid 3 Lower lid 4 Convex part 5 One side stepped concave part 6 Arrowhead-shaped part 7 Connection part, 8 props, 9 Wide part 10 Hook part

Claims (5)

[Claims] 1. A box-shaped first and second battery pack main body having at least a battery housed therein and configured to be attachable to an electronic device main body, and connected to the first battery pack main body. A convex portion formed on the edge of the second battery pack main body and having a resilient direction to the left and right in the direction of the wall of the second battery pack main body and having an arrowhead-shaped portion on one side; The first battery pack body comprises a one-sided stepped recess formed in the wall direction of the first battery pack body and formed on the edge of the first battery pack body, and the arrowhead-shaped portion of the protrusion is elastically inserted and fixed. Characteristic battery pack lid structure. 2. A first and second box-shaped battery pack bodies each having at least a battery housed therein and configured to be attachable to an electronic apparatus body, and connected to the second battery pack body. A convex portion formed on the edge of the first battery pack main body and having a resilient direction to the left and right in a wall direction of the first battery pack main body and having an arrowhead-shaped portion on one side; A one-sided stepped recess formed in the wall direction of the second battery pack main body and formed on the edge of the second battery pack main body, and the arrowhead-shaped portion of the projection is elastically inserted and fixed. Characteristic battery pack lid structure. 3. The battery pack lid overlapping structure according to claim 1, wherein a connecting portion is connected to the arrowhead-shaped portion from a support. 4. The overlapping structure of a battery pack according to claim 1, wherein the width of the convex portion is smaller than the width of the opening portion of the one-side stepped concave portion. 5. The battery pack according to claim 1, wherein a maximum width of the convex portion is smaller than a width of an opening of the one-sided stepped concave portion.