JPS60194834A - Receiver - Google Patents

Abstract

PURPOSE:To attain miniaturization of a receiver main body section and to eliminate the need for the replacement of a power supply battery by separating the receiver main body and an earphone section with a plug and a jack and using a solar battery provided with the main body section to charge a power supply battery incorporated in the earphone section. CONSTITUTION:The receiver main body section 1 and the earphone section 2 are separated and they are connected by the plug 42 and the jack 41 connected to two-core codes 52A, 52B in use. A power supply battery 61 and the earphone unit 51 are connected in series with the inside of the earphone main body 20 and a required power supply is applied to each section of the receiver main body 1. On the other hand, the solar battery 63 is provided to the inside of the receiver main body 1, an output of the solar battery is applied to each part of the receiver main body as power via a diode 64 to charge the battery 61. In opening the SW62, the operation of the receiver is stopped to charge the battery 61. Thus, the miniaturization and thin construction of the receiver main body are attained and the replacement of the battery 61 is not required.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an earphone type radio receiver.

Background technology and its problems As a radio receiver dedicated to earbonds (headphones): (i) All the circuits are housed in one case (housing), and the earphones are connected to this through a cord.

(ii) A type of headphone that has all the circuits integrated into it and is worn on the head.

has been put into practical use.

However, in the receiver of type (i), there is a limit to miniaturization and thinning due to the built-in battery. Furthermore, in the type (ii) receiver, it is not possible to select a station while looking at the dial scale, so it is not possible to confirm the received station, and it may not be possible to select the correct station. Furthermore, in any type of receiver, the battery is small, so its lifespan is shortened and battery installation becomes expensive.

OBJECT OF THE INVENTION The present invention attempts to solve these problems.

SUMMARY OF THE INVENTION Therefore, in the present invention, a receiver is constructed from a receiver main body and an earphone, a solar cell is provided in the receiver main body, a rechargeable battery is built in the earbonn, and the solar cell The rechargeable battery is charged by the rechargeable battery, and the voltage of the rechargeable battery is supplied to the receiver body as an operating voltage.

In the embodiment, in FIG. 1, (1) is the receiver main body, (
2) shows the earbond part.

In the main body part +1), (11) indicates a receiving circuit (tuner circuit) having everything from a high frequency tuning circuit to a demodulating circuit, and this receiving circuit (1) receives broadcasts and extracts audio signals from the broadcasts. (2) is a low frequency amplifier, (21) is a variable resistor for adjusting the volume, (41) is an earphone jack, and the receiving circuit (1) is a variable resistor for adjusting the volume.
A variable resistor (2) is installed in the signal path between 1) and the amplifier (12).
1) and the DC cut capacitor (31) are connected, and the output terminal of the amplifier (12) and the jack (41) are connected.
A DC cut capacitor (32) is connected between the hot side output terminal (41A) and the hot side output terminal (41A).

Furthermore, the terminal (41A) of the jack (41) and the circuit (1
1) A resistor (22) of a predetermined value and a power switch (62) are connected between the hot side power supply line (18) of (12) and
are connected in series, and the ground side output terminal (41B) of the jack (41) is connected to the ground side power supply line (19) of the circuits (11) and (12), and the line (
A decoupling capacitor (33) is connected between 18) and (19).

A solar cell (63) is also provided, one end of which is connected to the connection point between the switch (62) and the resistor (22) through a backflow prevention diode (64), and the other end connected to the power line (19). Connected.

The above circuits and elements are housed together in one case α0) as shown by the chain line, but the solar cell (
63) is provided on the surface of the case (10).

Also, in the earphone section (2), (5) indicates the earphone unit (earbon body) that converts audio signals into playback sound, and this is a dynamic type (magnetic type) so that direct current can flow. has been done. Further, (61) indicates a rechargeable battery that serves as an operating power source for this receiver, and this is a flat battery such as a G-13 type battery, and is a so-called button battery. In this example, the battery (61) is two nickel-cadmium batteries connected in series.

Then, C1, these Unisol l-(51) and battery (61) are connected in series, and this series circuit connects to the earphone plug (42
)'s E7) side terminal (42A) and ground side terminal (43A)
).

Further, in this case, the battery (61) is housed in the housing (20) integrally with the Unisol l-' (51), and the battery (61) is housed in the housing (20).
Codes (52A) and (52B) are drawn out from.

Further, the resistor (22) is made relatively large with respect to the impedance of the unit l-(51), for example,
If the impedance of (51) is 8 to 32 ohms, it is several hundred ohms.

According to such a configuration, the plug (42) is connected to the jack (
41) and turn on the switch (62), one end of the battery (61) connects the unit (51) - cord (52A) -> plug (42) - jack (41) -> resistor (22) -> switch (62) is connected to the power line (18) through the current path, and the other end of the battery (61) is connected to the cord (52B) -> plug (42) - jack (
Since the circuits (11) and (12) are connected to the power supply line (19) through the current path of the circuit (41), the circuits (11) and (12) operate using the battery (61) as a power source.

Therefore, the audio signal from the receiving circuit (11) is transmitted through the variable resistor (21) - capacitor (31) - amplifier (12).
) → Capacitor (32) → Jack (41) → Plug (42) → Cord (528), (52B) is supplied to Unisol l- (51) through the signal line, and at this time, the battery (61) is Since the impedance is generally sufficiently low, reproduced sound can be obtained from the unit (51).

In addition, in this case, the resistor (22) and capacitor (33)
A series circuit with Uniso I-(51) and an amplifier (
12), but since the resistor (22) has a relatively large value compared to the unit (51), the resistor (22) and capacitor (33) are used as the AC load.
can be ignored.

In addition, the resistor (22) is connected to the battery (61) and the circuit (11).
(12) is connected in series to the current path between the power supply line (18), a voltage drop occurs in the resistor (22), and the operating voltage supplied to the circuits (11) and (12) increases accordingly. However, the current consumption of the circuits (11) and (12) can be approximately 1 mA each, and therefore, the voltage drop across the resistor (22) is also extremely small, so this is not a problem. Furthermore, for the same reason, there is no problem even if a direct current flows through Uniso (51).

On the other hand, when light enters the solar cell (63), the solar cell (63)
The output voltage is obtained from 63), but this voltage is connected to diode (64) → resistor (22) → jack plug (
42) - Unisol l - Through the current path of (51) °ζ battery (
61), and the battery (61) is charged. In addition,
At this time, if the switch (62) is on, floating charging is performed.

As described above, it is possible to receive broadcasts and charge the battery (61), but in this case, especially according to the present invention, the battery (61)
By storing the battery (61) in the earphone part (2), it is not stored in the main body part (11), and the solar cell (63) can be made thinner, so depending on the size and shape of the battery (61), the main body part ( The size and shape of the main body (1) are not affected, and the main body (1) can be made smaller and thinner.

In addition, since the tuning knob is provided on the main body (1), it is possible to select a station while looking at the dial scale, and the desired station can be selected correctly. Furthermore, it does not impair the operability of channel selection and volume.

Furthermore, since the battery (61) is a rechargeable battery and is charged by the output of the solar battery (63), there is no need to use a battery.

In the example shown in FIG.
). That is, Jack (
41) and the plug (42) are of three terminal type,
The terminal (41C) of the jack (41) is the switch (62)
A mold pig line (18) is connected through the diode (64), and one end of the solar cell (63) is connected to the terminal (41C) through a diode (64). In addition, the earbon unit (
51) is connected to the terminals (428) and (42[1) of the plug (42) through the cords (52Δ) and (52B),
The battery (61)' is connected to the terminals (42C) and (42B) of the plug (42) through the cords (52C) and (52B).
connected to.

Therefore, the voltage of the battery (61) is at the terminal (42C).

(41C), the output of the solar cell (63) is supplied to the terminal (41) and (12).
C).

(42G) is supplied to the battery (61). In this case, the resistor (22) can be omitted, so
Power efficiency can be improved.

In the example shown in FIG. 3, an amplifier (12) is provided in the earphone section (2). That is, the plug (42
) is inserted into the jack (41), and when the switch (62) is turned on, the transistor (71) is biased through the resistor (24) and turns on, and the voltage of the battery (61) changes to the voltage of the transistor (71). ) is supplied to the amplifier (12) through the resistor (23).
) - Plug (42) - Jack (41) - Switch (6
2)→Receiving circuit (11) through the current path of resistor (22)
) is also supplied with the voltage of the battery (61).

However, when the switch (61) is turned off, the transistor (71) is turned off, and times II (11)', (12
) is no longer supplied with the voltage of the battery (61).

Moreover, the output of the solar cell (63) is a terminal (41G).

The battery (61) is charged through (42G).

In addition, in the above description, a choke coil or a constant current circuit may be used instead of the resistors (22) and (23). Furthermore, when the output stage of the amplifier (12) operates in class A mode, the capacitor (32) is not necessarily required. Further, the receiving circuit (11) may be tuned by a so-called variable capacitor or electronically tuned, and even in the case of electronically tuned, it may be a Briscent type using a PLL.

Further, the amplifier (12) may be provided with a tone control circuit, a tone quality changeover switch, and the like. Furthermore, in the example of FIG. 1, a bypass capacitor may be connected in parallel to the battery (61).

Effects of the Invention The shape and size of the receiver body are not limited by the shape and size of the battery, making it possible to achieve miniaturization and thinning, and eliminating the need for batteries.

[Brief explanation of drawings]

1 to 3 are connection diagrams of an example of the present invention. (1) is the receiver body part, (2) is the earphone part, (11)
is a receiving circuit, and (61) and (63) are batteries.

Claims (1)

[Claims] It is composed of a receiver main body part and an earphone part, the receiver main part has a receiving circuit that receives broadcasting and extracts an audio signal, and a solar cell. It has an earphone unit that converts it into an earphone unit, and also has a built-in battery that serves as an operating power source for the receiving circuit, and the voltage of this battery is supplied to the receiving circuit as an operating voltage, and the output of the solar cell charges the battery. receiver.