JPH0749892Y2 - In-vehicle surveillance camera - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention attaches a TV camera to the rear part of a vehicle body,
The present invention relates to a vehicle-mounted surveillance camera for visually recognizing the rear side and the immediate rear side of a vehicle on a monitor TV in a driver's seat.

[Prior Art] When a vehicle such as an automobile is moved backwards today, a monitor TV is attached to the driver's seat and a TV is mounted on the rear of the vehicle body in order to make a safety check near the rear of the vehicle, which is difficult to check due to the rearview mirror. It came to be equipped with a camera.

In such a vehicle-mounted surveillance camera having a television camera for photographing the rear of the vehicle and a television for the monitor, the camera unit such as the television camera is stored in the vehicle body during normal traveling to move the vehicle forward, and it is necessary to drive the vehicle backwards. In some cases, the camera unit is pushed out of the vehicle (for example, JP-A-56-99.835).
No., and No. 60-153.062, etc.), the power of the TV camera or monitor TV is turned on according to the protrusion of the camera part, and the rear image captured by the TV camera is projected on the monitor TV. There is.

[Problems to be solved by the invention] With a vehicle-mounted surveillance camera that allows a television camera mounted on the rear of the vehicle body to be pushed out of the vehicle as necessary,
Some cameras turn on the power of the camera unit and the TV unit at the same time when they start the protruding operation.However, with such a surveillance camera, the image of the monitor TV, which is the TV unit, shakes when the power is turned on and the camera unit protrudes. There is a drawback that the screen of the monitor TV becomes difficult to see because the flow and blur of the image due to the movement are added.

Further, even in a surveillance camera in which the power of the camera unit and the television unit is turned on after the camera unit is pushed out, the screen shakes when the power is turned on, and the screen is difficult to see.

[Means for Solving the Problems] The present invention is for a vehicle equipped with a television section in a driver's seat, a camera section stored in a rear part of a vehicle body, and the camera section being pushed out of the vehicle body to photograph the rear of the vehicle body or the like. In the surveillance camera, the power switch of the camera unit and the television unit is made a switch which is turned on together with the activation of the protrusion mechanism, and a position detection switch for detecting the protrusion completion position, a switch circuit capable of interrupting the video signal, and a video signal. A synthesizing circuit for synthesizing the synchronizing signal is provided, and when the operation of the protruding mechanism is started, only the synchronizing signal is sent from the camera section to the television section through the synthesizing circuit, and when the position detection switch detects the completion of the protruding, the switch circuit is turned on. As a result, the video signal is sent to the synthesizing circuit, and the synthesizing circuit synthesizes the sync signal with the video signal to form a video signal containing the sync signal. A television signal including a video signal is sent from the synthesis circuit to the television section.

[Operation] In the vehicle-mounted surveillance camera according to the present invention, the power switch is turned on together with the activation of the protrusion mechanism, the operation of the camera unit and the TV unit is started, and the camera unit and the TV unit are operated by the TV signal from the camera unit. The video can be synchronized with.

By providing the position detection switch, it is possible to detect the completion of the protrusion of the camera unit, and the video signal can be interrupted by the switch circuit until the camera unit is fixed at the protrusion completion position.

[Embodiment] In the embodiment of the vehicle-mounted surveillance camera according to the present invention, a TV section, which is a monitor TV, is provided in the driver's seat of the vehicle, and the TV camera as the camera section is attached so as to be housed in the bumper at the rear of the vehicle body. When photographing the rear part of the vehicle with a TV camera, the rear part of the vehicle is monitored by rotating the TV camera so that it protrudes from the bumper and displaying the image captured by the TV camera on the monitor TV.

In the surveillance camera in which the camera section is pushed out from the rear part of the vehicle body when performing rearward monitoring as described above, the power switch 12 and the push-out start switch 14 are interlocked switches, and the shift lever is in the reverse position as shown in the accompanying drawings. The switch structure is such that the switch is turned on when the switch is turned on, and the push-out start switch 14 is turned on to operate the push-out mechanism 16, and the rotation of the motor and an appropriate gear or link mechanism etc. 20 shall be pushed out to the rear of the vehicle. Further, when the power switch 12 is turned on, each part of the surveillance camera such as the television camera 20, the monitor television 28, and the synthesizing circuit 24 is operated, and the horizontal synchronizing signal and the vertical synchronizing signal from the television camera 20. And the video signal separately to the synthesizing circuit 24, and the synthesizing circuit 24 synthesizes the horizontal synchronizing signal and the vertical synchronizing signal with the video signal into a television signal which is a video signal including the synchronizing signal, and monitors the television signal. A switch circuit 22 using an analog switch or the like is inserted in the video signal path from the TV camera 20 to the synthesizing circuit 24 in the camera unit 18 while transmitting to the television 28, and the video signal is transmitted to or cut off from the synthesizing circuit 24. I will do it.

Further, a position detection switch 30 for detecting the position of the TV camera 20 is provided, and the position detection switch 30 detects the position of the TV camera 20 by using a limit switch or the like, and the TV camera 20 protrudes by the protrusion mechanism 16. When moved to the completion position, the limit switch or the like is turned on so that the position detection switch 30 outputs an H level control signal, and the control signal is sent to the switch circuit 22. Switch circuit
Reference numeral 22 has a structure that blocks the video signal when no control signal is input.

Therefore, in the vehicle-mounted surveillance camera according to the present embodiment, when the shift lever is moved to the reverse position, the push-out start switch 14 is turned on and the push-out mechanism 16 causes the television camera 20 to move.
When the shift lever is operated, the power switch 12 is turned on together with the push-out start switch 14 when the camera portion 18 such as the like starts to be turned on, and the power source voltage is supplied to the television camera 20, the synthesizing circuit 24, the television portion 26, the monitor television 28, and the like. Is turned on, the monitor TV 28 turns the TV camera 20
The image synchronized with the TV camera 20 is displayed based on the synchronization signal of. However, when the protrusion mechanism 16 starts to operate and the TV camera 20 is in the middle of the protrusion movement, the position detection switch 30 is still in the OFF state, and the video signal from the TV camera 20 is cut off by the switch circuit 22. Therefore, the television signal output from the synthesizing circuit 24 to the monitor television 28 is only a synchronizing signal, and the television signal having a black level of the video signal is sent to the monitor television 28, and the screen of the monitor television 28 is a black screen. However, the image behind the vehicle captured by the TV camera 20 is not projected.

Then, the camera unit 18 pushes out to the completion position of the push-out mechanism 16
When the movement of the camera unit 18 is completed, the position detection switch 30 is turned on to output a control signal, and the control circuit outputs the control signal.
22 sends the video signal from the TV camera 20 to the synthesizing circuit 24. Therefore, the TV signal output from the synthesis circuit 24 includes a video signal for projecting the image captured by the TV camera 20 on the screen of the monitor TV 28, and the monitor TV 28 completes the projection of the camera unit 18 and the TV camera
Since the scenery behind the vehicle begins to appear when 20 is fixed, the blurring of the image due to the protruding movement of the TV camera 20 is prevented, and the monitor TV 28 is preliminarily equipped with the TV camera 20.
Since it is synchronized with the camera, it prevents the image from shaking due to the synchronization shift until the television synchronization that generally occurs when the power of the television is turned on etc. is synchronized, and it is instantly clear when projecting an image. It is possible to capture a perfect image.

A delay circuit is inserted between the position detection switch 30 and the switch circuit 22, and the timing at which the switch circuit 22 is turned on by the control signal output from the position detection switch 30 is slightly delayed from the output of the control signal. Accordingly, if the camera unit 18 completes the protrusion and the image taken by the TV camera 20 is projected on the monitor TV 28 when the movement of the camera unit 18 is stopped without fail, the position detection switch 30 can be easily attached and adjusted. can do.

Also, the position detection switch 30 can be used also as a protrusion completion detecting device in the protrusion mechanism 16 by stopping the protrusion operation of the protrusion mechanism 16 by a control signal from the position detection switch 30.

[Advantages of the Invention] The present invention provides a position detection switch and a switch circuit in a vehicle-mounted surveillance camera having a television section for a monitor, a camera section housed in a vehicle body, and a protruding mechanism for protruding the camera section. Furthermore, a combination circuit is provided, and the video signal is blocked by the switch circuit until the position detection switch detects that the TV camera has pushed out.The TV signal containing only the synchronization signal is sent from the combination circuit to the monitor TV in the TV section. Will display a black screen,
In addition, since the TV signal, which is a combination of the video signal and the sync signal, is sent to the TV section when the camera section completes the extension and the movement is stopped, the monitor TV displays the rear portion of the vehicle from the time when the extension of the camera section is completed. The image on the monitor is projected, and the screen of the monitor TV is black while the camera is moving out.Therefore, screen blurring due to the moving out of the TV camera is prevented, and when the black screen is projected Since the synchronization with the TV camera has been completed, it is a vehicle-mounted surveillance camera that can immediately display a clear image when the projection of the camera unit is completed.

[Brief description of drawings]

The accompanying drawings are block diagrams showing circuits in an embodiment of a vehicle-mounted surveillance camera according to the present invention. 12 …… Power switch, 14 …… Slide start switch, 16
…… Advance mechanism, 18 …… Camera part, 20 …… TV camera, 22 …… Switch circuit, 24 …… Composite circuit, 26 …… TV part, 28 …… Monitor TV, 30 …… Position detection switch.

Claims (1)

[Scope of utility model registration request] 1. A surveillance camera having a camera section housed in a vehicle body, a television section for monitoring a shadow image photographed by the camera section, and a pushing-out mechanism for pushing the camera section out of the vehicle body. In addition, a power supply switch for the camera unit and the TV unit that are turned on, a position detection switch for detecting the completion of the protrusion of the camera unit, and a switch circuit capable of cutting off the video signal from the TV camera, and The camera section is provided with a synthesizing circuit for synthesizing the video signal from the switch circuit and the synchronizing signal from the television camera and outputting the synthesized signal to the television section, and the switch circuit is turned on when the position detection switch detects the completion of the protrusion. An in-vehicle surveillance camera, which is configured to send a video signal output from a television camera to a synthesizing circuit.