JPS5923351Y2 - Battery storage device for electrical equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a battery storage device for electrical equipment, and its purpose is to avoid increasing the thickness of the equipment body even in thin electrical equipment such as ultra-compact cassette tape recorders. The purpose is to increase the strength of electrical storage cases and to prevent problems such as bending, denting, and warping.

Recently, there has been an active movement to make equipment thinner, especially through the disassembly of audio equipment such as ultra-small cassette tape recorders and radio receivers, and radio receivers and the like with a thickness of several millimeters are already on the market.

Such thin electrical equipment is lightweight and compact, making it easy to carry, and has various advantages.

The biggest limitation in making such devices thinner is the battery.

The shape of batteries has been standardized, and there are JIS (eight industrial standards) in Japan, and IEC (International Electrotechnical Commission) standards that are common worldwide, and the thickness of the device depends on the diameter of the battery.

By the way, many of the electric devices that are made thinner are of high-quality type, and in order to give the device a high-class appearance, the cabinet of the device is usually constructed of a metal material such as aluminum.

Among these metal materials, aluminum is widely used because it has the advantages of being light, easy to surface finish, and easy to process.

Furthermore, even if the plate thickness of aluminum is reduced, a certain degree of strength can be obtained.

On the other hand, cabinets made of synthetic resin lack a luxurious feel, are difficult to form thin walls, and cause sink marks on the surface (if the change in thickness is extreme, the surface becomes depressed). However, it has the advantage of being relatively inexpensive and being able to accommodate complex shapes.

Therefore, in order to create a cabinet with a beautiful appearance and high strength without increasing costs, a structure is adopted that uses a synthetic resin structure as a base and covers it with metal plates.

In this case, if we try to keep the thickness of the device to a value equal to the diameter of the battery plus the thickness of the metal plate in consideration of making the device thinner, the synthetic resin battery storage case will be as shown in Figure 1. If the bottom surface is an opening for attaching and removing the battery, it is necessary to make a long hole B in the center of the top surface so that a part of the battery A comes into contact with the metal plate.

If this is done, there will be a problem that the strength will be insufficient in the longitudinal center of the battery storage case, and warpage will occur as shown in FIG. 2.

To prevent this, it is possible to provide a rib that connects the opposite sides of long hole B, but if the rib is simply added, the thickness of the device will increase by the thickness of the rib, making it thinner. This is not desirable as it deviates from this point.

Therefore, this invention aims to solve these problems all at once, and makes it possible to increase the strength of the battery storage case while keeping the thickness of the device to the sum of the diameter of the battery and the thickness of the metal plate. This is what I did.

An embodiment of the present invention will be described below with reference to the drawings from FIG. 3 onwards.

First, FIG. 3 is a surface appearance diagram of the ultra-thin tape recorder in this embodiment, in which 1 is a cassette lid, 2 is a speaker section,
3 is an operation button section.

4 is a decorative plate that forms part of the upper case, and here an aluminum plate is used.

Reference numeral 5 denotes a case body made of a synthetic resin molded product onto which the decorative plate 4 is adhesively fixed, and is the main component of the upper case.

FIG. 4 is a surface external view of the tape recorder.

A lower case 6 is made of an aluminum plate, and is fixed to the case body 5 with four screws 7.

Reference numeral 6a denotes a notch provided in the lower case 6, which serves as a guide when attaching and detaching a battery case 9 to and from the case body 5, which will be described later.

Reference numeral 6b designates a hole portion similarly provided in the lower case 6, through which the battery case ejection knob 8 can slide.

Reference numeral 9 denotes a battery case made of a synthetic resin molded product, in which two batteries A are housed in series (see FIG. 8).

Reference numeral 9a is a hole for escaping the diameter of the battery, and is designed to have a certain width and thickness so that it can be seen from the outside when the battery is removed and the molded resin can flow easily.

That is, as shown in FIG. 6, the hole 9a is rounded to widen the hole and stabilize the flow of the resin.

If the corners of the hole 9a are not rounded, the flow of the resin will be uneven, and the periphery of the hole will be curved instead of straight, resulting in an unsightly appearance, and the width of the hole will become narrower.

Reference numeral 9b denotes a reinforcing rib provided to connect the opposite surfaces of the hole 9a, and at least one reinforcing rib is provided, and the case 9
This prevents warping and deflection.

The height of this rib 9b is approximately the same as the thickness of the aluminum decorative plate 6 (see FIG. 7).

Further, this rib 9b has a thin portion formed in a portion extending over the hole portion 9a, and this is designated as 9C (see FIGS. 9 and 10).

This is the hole 11 a of the aluminum decorative plate 11 which will be described later from the outside.
This is to prevent the inside of the device from being seen through the gap between the thin wall portion 9b and the thin wall portion 9b.

Reference numeral 9d is a raised piece that fits into the case body 5 and holds the battery storage case 9 on the main body case 5, and this holding state is shown in FIG.

Reference numeral 9e denotes a hole that fits into the tip 8a of the battery storage case take-out knob 8 to lock the battery storage case 9 to the case body (see FIG. 6).

Reference numeral 10 denotes a battery case removal spring provided in the case body.

This also has the role of relaying the power from the battery case to the case body through contact with each of the two opposing springs (see Figure 8).

Corresponding to these springs 10, there are terminal plates on the positive side and negative side that are connected to the springs 10 on the battery storage case 9 side, but these are not shown in detail.

Only the positive terminal plate is shown as 10' in FIG.

The negative side is brought to the spring side by wiring inside the battery storage case 9.

Reference numeral 11 denotes an aluminum decorative plate provided on the battery case, which has a hole 11 that fits into the rib 9b of the battery storage case 9.
The same number of ribs a as the ribs 9b are provided.

In addition, this hole 11a has a thin wall portion 9 as shown in FIG.
It is chamfered to allow C to escape.

11b is a chamfered portion.

When the rib 9b is fitted into the hole 11a, the end surface of the rib 9b is aligned with the top surface of the decorative plate 11.

In the above embodiment, the battery storage case 9 is replaced by the case body 5.
To insert the case 9 to the side, insert the case 9 from above so that the hole 6a and the raised piece 9d fit together, and push it in the direction A in FIG. 9e, and the battery storage case 9 is fitted and locked to the case body 5 by the spring pressure of the spring 10 (see FIG. 2).

When removing the battery storage case, move the knob 8 to the right in Figure 6. The tip 8a of the knob 8 will come out of the hole 9e, and the force of the spring 10 will move the battery storage case 9 in the opposite direction of arrow A in Figure 4. direction, and the case 9 can be taken out upward.

The battery storage case 9 and the decorative plate 11 are integrally formed by adhesive.

Further, the knob 8 is always biased toward the battery storage case 9 by a compression spring 12 whose one end is secured to the case body 5.

Although the above embodiment describes a detachable battery storage case, there is no problem even if the battery storage case part is integrated inside the device, and it is extremely effective in reducing the thickness of the device. It is.

As explained above, according to the battery storage device for electrical equipment of the present invention, the strength of the synthetic resin battery storage case is increased while keeping the thickness of the equipment to the sum of the diameter of the battery and the thickness of the metal plaque. Therefore, it is possible to prevent the occurrence of bending, warping, etc., and to provide an excellent battery storage device at a low cost.

[Brief explanation of the drawing]

1 and 2 are perspective views for explaining the drawbacks of conventional battery storage devices, FIG. 3 is a top perspective view of a tape recorder according to an embodiment of the present invention, and FIG. 4 is a rear perspective view. Figure 5 is an exploded perspective view, Figure 6 is a sectional view taken along line A-A in Figure 4, and Figure 7 is a cross-sectional view taken along line A-A in Figure 4.
The figure is a sectional view taken along the line B-B in Fig. 4, and Fig. 8 is a cross-sectional view taken along the line C-C in Fig. 4.
9 is an enlarged perspective view of a rib of the battery storage case, and FIG. 10 is a sectional view showing the relationship between the rib and the rib fitting hole. 4... Decorative plate, 5... Case body, 6
...Lower case, 9...Battery storage case, 9b...Rib, 11...Piece plate, 1
1 a...hole, llb...chamfer, A...battery.

Claims (2)

[Scope of utility model registration request] (1) A battery storage device for an electrical device in which at least a part of the device body is made of a metal plate such as aluminum, the device body is provided with a battery storage case, and the battery storage case is made of synthetic resin; Further, on the outer surface of this battery storage case, a long hole is provided to escape the diameter of the battery along the axial direction of the battery, and one or more reinforcing ribs are provided that connect opposite sides of the long hole, and the shape of the reinforcing rib is A corresponding hole is provided in the metal plate covering the outer surface of the battery storage case, and the height of the reinforcing rib is made approximately equal to the thickness of the metal plate, and the reinforcing rib of the battery storage case is fitted into the hole in the metal plate. and the thickness of the battery storage device is approximately equal to the total thickness of the metal plate of the device body, the battery diameter, and the thickness of the metal plate of the battery storage case. . (2) The hole in the metal plate is chamfered, and the reinforcing rib of the battery storage case that fits into this hole is also shaped to follow the chamfer of the hole, so that the inner wall surface of the hole and the outer surface of the reinforcing rib 2. A battery storage device for electrical equipment according to claim 1, wherein the reinforcing ribs are brought into close contact with each other, and the front end surfaces of the reinforcing ribs are aligned with the outer surface of the metal plate.