JPH0436997Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention installs a television camera that takes pictures of the rear of the vehicle and installs a television monitor that displays images from the camera inside the vehicle in order to confirm the safety of the vehicle. Regarding the installed vehicle rear confirmation television device.

[Summary of the invention] When the key switch that starts the vehicle's engine is turned on, the timer circuit operates, and the output of the timer circuit turns on the relay. The power to the rear confirmation television device is turned on by the ON operation of the relay, and the rear of the vehicle is displayed on the television monitor. When the time set in the timer circuit is reached, the timer circuit stops operating and the relay is activated.
OFF, and the power to the rear confirmation television device is turned off.

[Prior Art] A conventional rear confirmation television device is linked to a shift lever that moves the vehicle backward. For this reason, the power to the rear confirmation television device is turned on only when the shift lever is set to reverse, and the power to the television device is turned off when the shift lever is changed from reverse to any other state.
It was becoming like that.

[Problems to be solved by the invention] For this reason, if you only wanted to check the rear without backing up, you had to move the shift lever into reverse while depressing the clutch or brake pedal.
Particularly when starting a vehicle, it is necessary to check the front, rear, left, and right sides of the vehicle, but in order to check the area that cannot be covered by the vehicle's side mirrors and rear view mirrors, the drawback is that the above-mentioned cumbersome operations are required. It was hot.

The purpose of the present invention is to turn on the power to the rear confirmation television device when starting the vehicle without operating the clutch pedal or shift lever, thereby making it easier to perform operations for checking the rear.

[Means for Solving the Problem] In order to solve the above object, the present invention provides a key switch that starts the engine of the vehicle, a television camera that photographs the rear view, a television monitor that displays the image, and a power-on time for the rear confirmation television device. The gist is that the television device is configured by a timer circuit for determining the power supply, and a relay for controlling the power supply of the television device.

[Operation] When the key switch that starts the vehicle is turned on, the timer circuit is activated and the relay is turned on, thereby turning on power to the television camera and television monitor. When the timer circuit reaches an arbitrarily set time, the relay turns off and the power to the TV camera and TV monitor is cut off.

[Embodiment] FIG. 1 shows a block diagram of the present invention. In Fig. 1, 1 is a power source, 2 is a key switch that starts the vehicle, 3 is a back gear switch that turns on when the vehicle's shift lever is put into reverse gear, 4 is a power-on detection circuit, 5 is a timer circuit,
6 is a relay having a switch 61, 7 is a television monitor, and 8 is a television camera.

Now, in such a configuration, when the key switch is turned on to start the vehicle, back gear switch 3 and switch 6 of relay 6 are turned on.
Power is supplied to 1. As the supplied power supply voltage rises, the power-on detection circuit 4 detects that the key switch 2 is turned on, and generates a trigger pulse that drives the timer circuit 5. This state is shown in FIGS. 2a and 2b.

The trigger pulse is input to the timer circuit 5,
Activate it. When the timer circuit 5 is activated, the relay 6 is energized and the switch 61 is activated.
is turned on, and power is supplied to the television monitor 6 and television camera 8 via the switch 61. Therefore, you can check what's behind you through the side mirrors and rear view mirrors of your vehicle.

When the time arbitrarily set by the timer circuit 5 is reached, the timer circuit 5 stops energizing the relay 6, the switch 61 is turned off, and the power to the television monitor 7 and television camera 8 is cut off. This state is shown in FIG. 2c.

When the shift lever is put into reverse while driving the vehicle, the reverse gear switch 3 is turned on, and power is supplied to the television monitor 7 and television camera 8 via the reverse gear switch 3.
You can check backwards.

As described above, this invention has two key switches: ON and OFF.
Although we have explained the case of three stages, if the switching is in three stages: OFF, ACC (accessory power is turned on), and ON, then relay 6 can be controlled using the method shown in Figures 3 and 4. good.

The method shown in FIG. 3 is such that when the key switch 2 is in the ACC position, it is determined that the driver intends to move the vehicle, and the rear view can be checked.

When the key switch 2 is changed from OFF to ACC, power is supplied to the relay 6 via the diode 9, thereby turning the switch 61 ON. A power supply 1 is supplied to the switch 61, and power is supplied to the television monitor 7 and television camera 8, so that it is possible to check the rear of the vehicle. key switch 2
When set to the ON position, the same operation as shown in FIG. 1 is performed and the rear of the vehicle is checked for an arbitrary time set by the timer circuit 5. The diode 9 is provided to prevent the output of the timer circuit from flowing back to the vehicle accessory device connected to the ACC terminal of the key switch 2.

FIG. 4 shows the power-on circuit 4 of FIGS. 1 and 3 by supplying power to the television monitor 7 and television camera 8 to check the rear of the vehicle only when the key switch 2 is in the ACC position. It is an attempt to have it deleted.

When the key switch 2 is changed from OFF to ACC, voltage is applied to the start detection terminal of the timer circuit 5, the timer circuit is activated, and the switch 61 is turned ON by the relay 6. Switch 61 has power supply 1
Therefore, power is supplied to the television monitor 7 and television camera 8. An arbitrary operating time is set in advance in the timer circuit 5, and within this operating time, the driver checks the rear of the vehicle and turns on the key switch 2 to start the vehicle. When the key switch 2 is in the ON position, voltage is applied to the OFF detection terminal of the timer circuit 5, and even if the timer circuit 5 is in operation, it is forcibly stopped, the switch 61 of the relay 6 is turned OFF, and the TV monitor 7 and TV are turned off. Turn off the power to camera 8.

Although the present invention is used for checking the rear of the vehicle, it goes without saying that it can also be applied to checking the top, side, or entrance of the vehicle.

[Effects of the invention] As described above, according to the present invention, it is possible to check the rear of the vehicle without moving the shift lever of the vehicle to the reverse position. Even if there is no intention to back up, the situation around the vehicle can be grasped. Furthermore, since the gears, clutch, brake pedals, etc. of the vehicle can be operated after such safety confirmation, safety can be further ensured.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a diagram showing the timing of the operation of FIG. 1, and FIGS. 3 and 4 are diagrams showing other application examples of the present invention. 1...Power source, 2...Key switch, 3...Back gear switch, 4...Power on detection circuit, 5
...Timer circuit, 6...Relay, 7...TV monitor, 8...TV camera.

Claims (1)

[Scope of utility model registration request] 1. A rear confirmation television device for a vehicle, comprising a timer circuit that operates the television device for a predetermined period of time when a key switch for starting a vehicle engine is operated.