CN2146076Y

CN2146076Y - Charging Unit for minisize radio and radio tape recorder

Info

Publication number: CN2146076Y
Application number: CN93236066U
Authority: CN
Inventors: 秦克
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-12
Filing date: 1993-01-12
Publication date: 1993-11-10
Anticipated expiration: 2003-01-12

Abstract

The utility model discloses a charging device, which is used for a small-size transistor receiver and a radio and radio tape recorder, adopts a transformer charging circuit without a power source, and has the advantages of less components and small volume. The utility model can be installed in the shell of the radio and radio tape recorder. An attached telescopic power plug is directly inserted into an alternating current power source of 220V, and the battery in the radio and radio tape recorder can be charged. The utility model also has the advantages of convenient operation and safety, and can effectively reduce the expense of consumers.

Description

Charging Unit for minisize radio and radio tape recorder

The utility model belongs to a kind of charging device that is used for small semiconductor broadcast receiver and receiving and recording reproducing player.

Pocket or portable homemade transistor radio of Chu Shouing and receiving and recording reproducing player generally all use the general dry battery power supply in the market, and its shortcoming is: general dry battery is limit and must often be changed because of capacity, and both inconvenience was increased expenditure again.If use the power supply of AC/DC convertor or D.C. regulated power supply, carry when then being not easy to go out.In recent years, a lot of consumers are used for rechargeable battery transistor radio or the receiving and recording reproducing player of oneself.Though rechargeable battery generally can charge hundreds of times repeatedly, useful life is longer, but at home under the prior art condition, use rechargeable battery need purchase charger specially, and battery to be taken out from broadcast receiver or receiving and recording reproducing player when charging at every turn, reinstall after the charging, so same the existence used inconvenience and the high shortcoming of expense.

The purpose of this utility model provides a kind of simple in structure, economic, safe, practical charging device, uses it can give the self-contained battery charging of small semiconductor broadcast receiver or receiving and recording reproducing player easily.

For achieving the above object, solution of the present utility model is: design a kind of power transformer that need not to use, element is few, the charging circuit that volume is little makes in its casing that can all be installed in small semiconductor broadcast receiver or receiving and recording reproducing player (hereinafter to be referred as former machine), and sets up a telescopic attaching plug, in the casing of plug retraction at ordinary times, as long as plug is stretched out outside the casing, directly insert the 220V AC Power supply socket when needing, just can charge to self-contained battery.

Because this device adopts the no power supply transformer charging circuit, and is safe in utilization for guaranteeing, taked following measure on circuit design:

As former machine user mode and charging work state exchange (but and double as original engine power supply switch), when switch placed former machine service position, former machine circuit and self-contained battery were connected, and disconnect with charging circuit with a switch; When switch placed charge position, charging circuit and self-contained battery were connected, disconnect fully with other partial circuits of former machine simultaneously (promptly not altogether " ").

Because in the above-mentioned solution; adopted and a kind ofly need not use power transformer; charging circuit simple in structure; and it is installed in the casing of small semiconductor broadcast receiver or receiving and recording reproducing player; taked the corresponding protection measure simultaneously; thereby can increase hardly that former body is long-pending, under the situation of weight, for it has increased charge function.After installing this charging device additional, the use of small semiconductor broadcast receiver or receiving and recording reproducing player is more convenient, and can obviously reduce the expenses in its whole cycle in useful life.

The utility model is described in further detail below in conjunction with an embodiment.

This embodiment is a pocket-size transistor radio that installs above-mentioned charging device additional.

Accompanying drawing is the electrical schematic diagram (having omitted the radio reception circuit part among the figure) of this embodiment.

In the accompanying drawing by capacitor C, resistance R ₁, R ₂With rectifier diode D ₁---D ₄Form charging circuit.Power input inserts the 220V AC power through plug, after capacitor C step-down, again through D ₁---D ₄A pulsating dc voltage is exported in the bridge rectifier rectification that constitutes.K is one two cutter three throw switches.When switch placed " 1 " position, battery pack E and radio reception circuit were connected, the normal radio reception of broadcast receiver; When switch placed " 2 " position, the both positive and negative polarity of battery pack E was all put sky, and broadcast receiver is in "off" state, and this moment, what load the charging circuit output did not also take over, and was in non operating state; When switch places " 3 " position, battery pack E is inserted charging circuit, insert LED and current-limiting resistance R simultaneously ₃Series arm, lumination of light emitting diode (playing the charged state indicative function), can insert the 220V AC Power supply socket this moment with the attaching plug of setting up in the machine, gives battery pack E charging.

By changing the capacity of capacitor C, can adjust the size of charging current.Present embodiment uses No. five Ni-Cd nickel-cadmiums of two joints, and charging current is 50mA, and the charging interval is 12 hours.

Certainly, battery pack E also can use common No.5 cell, prolongs its useful life by the regular short time charging of charging device.

The charging circuit of the foregoing description, battery pack and radio reception circuit are installed on the same printed circuit board.

Claims

1, a kind of charging device of forming by attaching plug and charging circuit that is used for small semiconductor broadcast receiver and receiving and recording reproducing player, it is characterized in that: this device is installed in the casing of transistor radio or receiving and recording reproducing player, adopt no power supply transformer step-down charging circuit, attaching plug is installed in scalable mode, plug is stretched out outside the casing, directly insert the 220V AC power, can charge to self-contained battery by the charging circuit through installing itself.

2, the charging device that is used for small semiconductor broadcast receiver and receiving and recording reproducing player according to claim 1, it is characterized in that: adopt the capacitor step-down charging circuit, with a switch as radio reception or receipts, record, playback and charging work state exchange, when this switch places charging work state position, charging circuit and self-contained battery are connected, and disconnect fully with radio reception or receipts, record, playback circuit.

3, the charging device that is used for small semiconductor broadcast receiver and receiving and recording reproducing player according to claim 2, it is characterized in that: mode switch is gone back double as broadcast receiver or receiving and recording reproducing player mains switch simultaneously, when switch places the charging operating state, also insert a light-emitting diode branch road, as the indication of charging operating state.