JPS5928556Y2 - Car radio and car stereo speaker switching device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an in-vehicle audio device that can be used by skillfully switching between a car radio and a car stereo speaker.

In a car that has a car stereo device and a car radio, various devices have been proposed in the past for making the speakers of the car stereo device sound on the car radio.

However, this conventional device uses a switch box and
By manually switching the switch, the speakers of the stereo device are connected to the radio, so
It has the following drawbacks.

That is, when the radio is turned on, the switch on the switch box is changed, the speakers of the stereo device are connected to the speaker terminals of the radio, and the radio sound is played through the speakers of the radio and the speakers of the stereo device, the car stereo When the device is operated, the car stereo device is placed in a no-load state, which may cause trouble to the stereo device.

Furthermore, there are also disadvantages such as forgetting to remove the tape from the car stereo device.

Also, reverse the switch on the switch box,
When the car stereo speaker is connected to the stereo device and the car stereo device is turned on, it is easy to forget to turn off the car radio.

The purpose of this invention was to eliminate these conventional drawbacks by cleverly using relays, and without making any changes to the car radio body, car stereo body, or respective speakers installed in the car. is an in-vehicle audio device that has a speaker switching mechanism between a car radio and a car stereo, in which the stereo speakers are connected to the radio main unit, and when the stereo main unit is activated, the stereo speakers are automatically connected to the stereo main unit. Our goal is to provide the following.

An embodiment of this invention will be described below.

Symbol C8 is the main body of the car stereo, and symbol CR is the main body of the car radio.

The car stereo main body C8 is activated by loading a tape and turning on the power switch SW1, and the car radio main body CR is activated by turning on the power switch SW2.

The car stereo main body C8 has a power connection terminal J.

Right speaker connection terminal J2, left speaker connection terminal J3
A power source CB, a right speaker 5PR1, and a left speaker SPL are connected to each connection terminal.

Further, the car battery is used as a power source for the car radio main body and the car stereo main body in the car.

Switching mechanism SPO between stereo speakers and radio speakers
consists of one relay RY and two relay contacts RY1 . . . whose electrical contacts are switched by this relay RY. It is composed of RY2.

Both ends of the operating coil of the relay RY are connected to the connection terminals J4 and J7, the movable contact piece RY1a of the relay contact RY1 is connected to the connection terminal J8, and the normally open contact RY1b is connected to the connection terminal J. , and the movable contact piece R of relay contact RY2
Y2a is connected to the connection terminal J, and the normally open contact RY2b is connected to the connection terminal J6.

In addition, the normally closed contact RY1c (l!:R
Y2c is connected to the connection terminal Jio.

And the speaker switching mechanism SP configured in this way
O is connected to the car stereo main body C8 and a pair of stereo speakers SPR and SPL as follows.

That is, the above-mentioned connection terminal J4 is connected to the power supply connection terminal J1, the above-mentioned terminal J5 is connected to the right speaker connection terminal J2, and the above-mentioned terminal J
6 are connected to the left speaker connection terminal J3, the connection terminal J7 is connected to the power supply CB via the fuse F1, the terminal J8 is connected to the right speaker SPH, and the terminal J is connected to the left speaker SPL. It's broken.

On the other hand, the car radio body CR has its power connection terminal J11
The power source CB is connected to the power source CB through a fuse F2, and a radio speaker SP is connected through a connector J12 which is a speaker connection terminal.

The connector J1□ is exposed to the outside of the car radio body CR, and the connector J12 has the connection terminal J
IO is connected.

Next, to describe its effect, if you turn on the power switch SW2 of the car radio body CR now, the car radio body CR
The audio is sent to radio speaker SP via connector J12.
At the same time, connect connector J12 - connection terminal JIO -
Due to the closed circuit of normally closed contact RY1c, movable contact RY1a, connection terminal J8, right speaker SPH, and the closed circuit of connector J12, connection terminal JIO, normally closed contact RY2c, movable contact piece RY2a, connection terminal J9, and left speaker SPL, Play a pair of stereo speakers SPL and SPR.

Therefore, when a radio broadcast is received by the car radio main body CR, it can be heard through the stereo speakers SPL and SPR of the stereo main body C8 in addition to the radio speaker SP, and all the speakers can be used effectively.

Next, when listening to a stereo tape, turn off the power switch SW2 of the car radio body CR, install the tape in the car stereo body C8, and then turn off the power switch SW1.
Just turn it on.

This causes current to flow through relay RY, causing it to operate.

If this operates, movable contact pieces RY1 a, RY2a
Since the normally open contacts RY1 b and RY2b are switched automatically, the speakers SPR and SPL are connected to the car stereo main body C8, and the car stereo main body C8
The right signal output is the connection terminal J2 end terminal 5 - normally open contact RY
1b - The movable contact piece RY1a is applied to the right speaker SPR through the terminal J8, and the left signal output of the car stereo main body C8 is connected to the connection terminal J3 - the remaining 5° - the normally open contact RY2b
- Left side speaker S through movable contact piece RY2a and terminal J
It is applied to PL to produce stereo tape playback sound.

Furthermore, if the user wishes to listen to radio broadcasting while the stereo sound is being reproduced, the user may turn on the power switch SW2 of the car radio body CR.

Then, in this state, the user can listen to the radio broadcast through the dedicated radio speaker SP, regardless of the car stereo main body C8 and the stereo speakers SPR, SPL.

The radio broadcast at this time can be heard at the same time as the stereo playback sound.

After listening to the stereo playback sound, turn on the power switch
When 1 is turned off, the power to relay RY is cut off, so movable contacts RY1a and RY2a are normally closed contacts RY1c and R
Y2c switches to crocodile.

When this is restored, the stereo speakers S will be restored as before.
PR and SPL are connected to connector J12 through relay contacts RY1 and RY2.

Therefore, when listening to radio broadcasts, all speakers can be effectively operated again.

As described above, according to this invention, switching between stereo speaker power and radio speakers is automatically performed using a relay,
Operate the car stereo main unit C8 with no load,
It is possible to provide an in-vehicle audio device having a speaker switching mechanism that eliminates the drawbacks of this type of conventional speaker switching mechanism without forgetting to turn off the switch.

Furthermore, since the speaker switching relay functions as a filter for the power supply, it is also possible to prevent unnecessary noise from intervening.

Note that the opening and closing of the power switch SW1 in the above embodiment may of course be performed in conjunction with the operation of attaching and detaching the tape to the car stereo main body C8, and in this way, the disadvantage of forgetting to remove the tape can also be eliminated. can do.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of this invention, and C8...
... Car stereo body, CB ... Power supply, RY
...Relay, SPR, SPL...Car stereo speaker, SP...Radio speaker, RYl. RY2...Relay contact.

Claims (1)

[Scope of utility model registration request] a power supply, a car radio main body, a car stereo main body, a relay connected between the car stereo main body and the power supply and driven by turning on a power switch of the car stereo main body;
A stereo speaker that is connected to the car stereo body through a normally open contact that is switched by the operation of this relay and also connected to the car radio body through the normally open contact of the relay, and a radio speaker that is connected to the radio body. When receiving a radio broadcast using the car radio body, the stereo speaker and the radio speaker are activated, and when the car stereo body is playing, only the stereo speaker is activated, and the car radio body operates the radio speaker to perform radio broadcasting. An in-vehicle audio device characterized by being able to listen to both at the same time.