JPS609975Y2 - Electronic device power supply - Google Patents

Description

[Detailed description of the invention] The present invention relates to a power supply device for use in, for example, ultra-small tape recorders (micro cassette type) and other raw-type, ultra-small portable electronic devices that consume relatively large amounts of power. The main purpose of the invention is to make it possible to interchangeably attach and detach a normal dry battery case, a rechargeable battery case with a DC jack, and an AC adapter to the main body of the device.
The purpose is to provide convenience in the use of the equipment.

Hereinafter, a specific example in which the present invention is applied to a well-known microcassette type tape recorder will be explained with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of an example of a micro-sized tape recorder already on the market.

In the figure, 1 is a micro cassette type tape recorder as a whole, 2 is its main body, and 3 is a lid (Kangaru-type) installed at a slightly forward position on the upper surface of the main body and opened and closed in the direction of the arrow.
In this example, a micro cassette 4 is placed inside this cassette holder 3.
(shown with broken lines) is inserted and set in the mounting section within the main body.

Reference numeral 5 denotes a playback and rewind operation lever located at the top of the right side when the main body 2 is stood upright and viewed from the front.The lower position of the same right side is the heir of the thumb control for volume and the heir to fast forward ( (none of which are shown), and a recording button 6, a microphone jack 7a, an earphone jack 7b, etc. are provided on the upper surface perpendicular to the side surface, and a review heir 8 and a hanging metal fitting are provided on the right side in the illustrated state. It has 9.

Note that 10 shown on the front part of the top cover is a safety lock heir, 11 is a built-in microphone, 12 is a recording/battery check lamp, and the rear part of the cassette holder 3 is a speaker grill 13.

By the way, the tape recorder of this example is equipped with a detachable battery case 14 at the rear of the main body 2, and the illustrated battery case 14 is inserted from the rear as shown by the solid line arrow a, and pulled out as shown by the broken line arrow A. However, the present invention provides compatibility between, for example, a normal dry battery case with such an attachable/detachable structure, a rechargeable battery case, and an AC adapter. This is a new innovation.

The dry battery case 14 described above is made of a resin molded product having a rectangular outline as shown in FIG.
On both sides of the arrows a and b), a slide groove 15 that engages with the guide strips on the recorder main body 2 side, a finger grip 16, etc. are formed, and the front plate 14a of the case is formed, for example, on the left side part. For example, a pair of contact pieces 18a and 18b made of small pieces of conductive metal plates are fixedly attached along the upper edge of the front plate 14a, and when the case 14 is inserted into the main body 2, these contact pieces 18a and 18b are attached to the main body side. In addition, the back plate 14b of the case is made slightly thick, and at symmetrical positions on the upper surface, there are, for example, click protrusions on the main body 2 side when the case is inserted. An engagement hole 19 for preventing removal is formed into which the material is inserted.

In addition, in the figure, 20 is two size AA batteries housed in the case, 21 is a connector plate that connects both different poles, and 22a and 22b are in contact with the + and - poles of each battery separately. The arranged terminal pieces 22 are shown, and these terminal pieces 22
a, 22b and each of the above-mentioned contact pieces 18a, 18b
are electrically connected to each other to obtain a rated voltage of 3V DC.

However, the dry battery case itself is a well-known matter.

FIG. 3 has the same outer dimensions as the dry battery case 14 shown in the example shown in FIG.
This is a plan view showing a rechargeable battery case 23 in which the engagement hole 18b and the engagement hole 19 of the back plate 14b are in the same manner, and inside the case are rechargeable batteries 24 nickel cadmium batteries having approximately the same battery capacity as the above-mentioned No. 3 size AA batteries. etc.), and these batteries are also inserted between the connector plate 21 and each terminal piece 22a, 22b as in the case of the example case in Figure 2, but the rechargeable batteries are larger than the dry batteries of the same capacity. Since the terminal pieces 22a and 22b can be made small in size, the terminal pieces 22a and 22b are arranged inward as shown in the figure, and the rechargeable battery 24, which has been made short in advance, is held between them, and the remaining space is used to make the rear plate 14b smaller. Power jack 25 that opens on the side of
A plug of an AC adapter, which will be described below, is inserted into this jack 25.

The jack 25 and each rechargeable battery 24 are connected via the respective contact pieces 18a and 18b, and when the rechargeable battery case 23 is inserted into the tape recorder main body 2,
It goes without saying that normally the current is supplied from the rechargeable battery 24, but if the plug of the AC adapter is inserted into the jack 25 in this state, DC3V current will be supplied directly to the tape recorder from the commercial power source, and the rechargeable battery 24 will also be supplied. It will be charged.

However, it is more common to use the single rechargeable battery case 23 by connecting it to an AC adapter and charging it, and then inserting it into the tape recorder body for use or as a spare.

Further, FIGS. 4A (top view) and B (side view) are diagrams for explaining the AC adapter, and the outer dimensions of the adapter case 26 are also the same as those of the dry battery case 14 and the rechargeable battery case 23, And slide groove 1 on both sides
5, gripping part 16 (Fig. 2), contact piece 18a,
18b and the engaging hole 19 (FIG. 2) are also covered with bark as in the previous example.

Therefore, although the illustrated adapter 26 can be inserted into the tape recorder main body 2 in the same state as each battery case, the adapter 26 is a flat case whose top surface is also sealed.

The special structure of the AC adapter 26 of this example is that a plug 20 that faces approximately below the contact pieces 18a, 18b and can protrude toward the front side of the case is arranged inside.
The plug 27 is fitted into the jack 25 of the rechargeable battery case 23 in the example shown in FIG. exhibits a frictional bond state, and t
They are connected in a C-like manner, and when the re-plug 27 is pulled out from the jack 25, it is automatically restored into the case 26.

That is, the plug 27 is integrally provided with a pusher 28 that protrudes toward the back side of the case 26, and is biased in the restoring direction by a tensioning coil spring 29, and when the pusher 28 is pushed as shown by the arrow in Figure B. , plug 27 to 27'□
It can be made to protrude to the state of.

In Figure A, 30 is a transformer, 31 is a rectifier circuit, 32 is a plug for insertion into a commercial power supply, and rectifier circuit 3
1, the plug 27, and the contact pieces 18a, 18b are electrically connected to each other.

From the above, the effects that the present power supply device can bring are clear, but in short, the present invention has the following advantages: - For example, when a micro-sized tape recorder such as the one mentioned above is used in a place where there is AClooV commercial power supply, the power supply device of the present invention is already installed. AC in rechargeable battery case
They can be combined or used in various ways, such as by connecting an adapter or by directly inserting an AC adapter into the tape recorder main body. For example, the original purpose of this type of tape recorder is In addition to offering great portability; AC
The adapter can be used indirectly or directly, and there is no need to provide a DC jack for an external power source on the recorder body, and there is no need to install a DC jack for an external power source on the recorder body. Another great advantage is that it provides compatibility and allows for timely replacement of battery cases by carrying a rechargeable battery case as a spare for a dry battery case, for example.

As mentioned at the beginning, the present power supply device can be applied to various electronic devices other than tape recorders, and its practical effects are extremely large.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an example of an ultra-small tape recorder to which the present invention can be applied, FIG. 2 is a perspective view showing an example of its dry battery case, and FIG. 3 is a plan view showing an example of a rechargeable battery case. FIGS. 4A and 4B are a diagrammatic plan view and a side view thereof for explaining the AC adapter. 1 is the entire microcassette type tape recorder, 2 is its main body, 14 is a dry battery case, 18a and 18b are contact pieces, 20 is a dry battery, 23 is a rechargeable battery case,
24 is a rechargeable battery, 25 is a jack, 26 is an AC adapter, 27 is its plug, 28 is a pusher, 30 is a transformer, and 31 is a rectifier.

Claims (1)

[Scope of utility model registration request] Each has a dry battery case formed to have the same external dimensions as S゛,
It has a rechargeable battery case and an AC adapter, which are detachably and selectively attached to the same location on the main body of the electronic device, and the surfaces thereof have contact terminals and electrical connections provided on the main body of the electronic device. A conductive metal piece that comes into contact with the battery is adhered thereto, a dry battery is housed in the dry battery case in a replaceable manner, a rechargeable battery is housed in the rechargeable battery case, and one side is provided with the battery and the battery. A state power jack connected to each of the conductive metal pieces is installed,
The AC adapter has an AC-DC converter built in, and a DC plug that can be protruded from the AC adapter case and connected to the power jack of the charging 'Uf2 case by operating a pusher. A power supply device for electronic equipment, in which an output end of an AC-DC converter is connected to the DC plug and the conductive metal piece.