JPS5919321Y2 - small electrical equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of the battery compartment of small electric appliances such as electric shavers and portable lights that use batteries as a power source. The purpose is to provide equipment.

A conventional device of this kind, for example, used in a battery compartment of a mobile light, etc., has a structure in which a coil spring 51 with a tapered tip is fitted to the bottom of a battery replacement cap 50, as shown in FIG. The rear end of the battery 53 housed in the main body case 52 is pressed, and electrical continuity between the battery replacement cap 50 and the main body case 52 is established using the eyelet 54 attached to the valley of the screw portion 52a of the case 52. was.

However, in this structure, since the battery 53 is replaced, repeated screwing and unscrewing operations tend to wear out the eyelet 54 and cause poor contact, and the coil spring 51 has a structure in which the tip thereof is wound tapered. Therefore, the manufacturing cost is high, and the spring pressure tends to vary because the spring 51 has a structure in which the diameter of the spring 51 is contracted during fitting, and the spring 51 is inserted into the battery replacement cap 50 and locked by restoring force.

In order to solve the above-mentioned drawbacks, this invention has an annular part, a protruding piece for battery contact that protrudes diagonally inward and upward from the inner edge of the annular part, and a position corresponding to the protruding piece in the radial direction. A cut-and-raised piece protruding outward from the outer edge of the annular part is 1
A battery holding plate made by punching and forming a conductive metal plate is attached to the bottom of the battery replacement cap.

This invention will be explained below using an example in which it is applied to a portable electric lamp.

In Fig. 1, reference numeral 1 denotes a metal cylindrical main body case with a lighting section (not shown) attached to one open end, and a battery 2 is housed inside, and the other open end, that is, the battery A battery replacement cap 4 is formed by forming a threaded portion 3 in the replacement port 1a.
It is attached by screws so that it can be attached or detached.

Reference numeral 5 denotes a battery holding plate attached to the bottom of the battery replacement cap 4, which includes an annular portion 5a and four battery contact protruding pieces 5b that protrude inwardly and upwardly from the inner edge of the annular portion 5a. A cut-and-raised piece 5C protruding outward and upward from the outer edge of the annular portion 5a is punched and formed from a single conductive metal plate at a position radially corresponding to the protruding piece 5b.

FIG. 2 shows a modified example of the battery holding plate 5, in which locking claws 5d are formed between cut and raised pieces 50 protruding from the outer edge of the annular part 5a, and protruding pieces 5b protruding from the inner edge of the annular part 5a. By forming a rib 5e that spans the bent portion at the tip, the contact pressure of the protruding piece 5b with the battery 2 is maintained, and the attachment of the battery holding plate 5 to the battery replacement cap 4 is made more secure. This is what I did.

FIG. 3 shows another embodiment in which the main body case 1 is made of synthetic resin, in which the tip of a metal lead plate 6 attached to the inner surface of the main body case 1 is bent outward in a U-shape. and
By engaging the locking piece 4a formed on the inner peripheral surface of the cap 4 with the engagement hole 1C provided in the battery exchange port 1a of the main body case 1, the portion of the bent portion facing the end surface 1b of the battery exchange port 1a is closed. 6a is brought into contact with a cut-out piece 5C of a battery holding plate 5 attached to the bottom of the cap 4.

In addition, in FIGS. 1 and 2, the battery contact protrusions 5b and cut-and-raised pieces 5C formed on the battery holding plate 5 are provided at four locations on the annular portion 5a, but the invention is not limited to this, and as shown in FIG. In this case, a locking claw 5d may be provided on the opposite side of the protruding piece 5b to prevent the battery holding plate 5 from becoming unbalanced when pressed by the battery 2.

Next, the operation of the portable electric lamp having the above structure will be explained.

As shown in FIG. 4, when the battery replacement cap 4 is screwed into the battery replacement opening 1a of the main body case 1 housing the battery 2 in the direction of the arrow P, the battery retaining plate 5 attached to the bottom of the cap 4 will open. The protruding piece 5b comes into contact with the rear end surface of the battery 2.

When the cap 4 is further screwed in from this state, the battery 2 pushes down the protruding piece 5b in the Q direction, and as a result of the reaction, the protruding piece 5b presses and supports the battery 2, and at the same time, the annular part 5a of the battery holding plate 5 acts as a fulcrum. The protruding piece 5b
The cut-and-raised piece 5C protruding in the radial direction rises in the direction of arrow S due to seesaw action and comes into contact with the end surface 1a of the main case 1.

Although the case of a portable electric lamp has been described as an embodiment of the present invention, the present invention is not limited to this, and similar effects can be obtained even if the present invention is applied to other small electric devices using batteries as a power source.

According to this invention having the above configuration, the battery holding plate 5, which is formed by punching and forming the battery contact protruding piece 4b and the cut-out piece 4C from a single conductive metal plate, is attached to the bottom of the battery replacement cap 4. When the cap 4 is attached to the main body case 1, the cut-and-raised piece 5C is brought into contact with the end face 1b of the battery exchange port 1a of the main body case 1, so that as the screwing force of the cap 4 becomes stronger, the cut-and-raised piece 4C increases. Since the end face 1b of the main body case is strongly pressed, electrical continuity between the main body case 1 and the cap 4 is ensured, and poor contact etc. will not occur.

Furthermore, since the battery holding plate 5 is formed by punching out a single conductive metal plate, manufacturing costs are also reduced.

[Brief explanation of the drawing]

Figure 1 is a partially exploded perspective view of a portable electric lamp implementing the present invention.
FIG. 2 is a perspective view showing a modification of the battery holding plate of the same embodiment;
FIG. 3 is a partially exploded perspective view showing another embodiment in which the main body case is made of synthetic resin, FIG. 4 is an explanatory view of the operation of the same embodiment, and FIG. 5 is a conventional example. 4...Battery replacement cap, 5...Battery holding plate, 5a...Annular part, 5b...Protruding piece, 5C...Cut A rising piece.

Claims (1)

[Scope of utility model registration request] In a small electric device of the type in which a battery exchange cap 4 is detachably attached to a battery exchange port 1A of a main body case 1, there is provided an annular portion 5a and a battery that protrudes diagonally inward and upward from the inner edge of the annular portion 5a. A battery holder in which a contact protruding piece 5b and a cut-out piece 5C protruding outward from the outer edge of the annular portion 5a at a position radially corresponding to the protruding piece 5b are punched and formed from a single conductive metal plate. Attach the plate 5 to the bottom of the battery replacement cap 4, and with the cap 4 attached, cut out the cut-out piece 5.
A small electric device characterized in that C contacts an end face of a battery exchange port 1a of a main body case 1.