JPS6238689A - Door phone slave set - Google Patents

Abstract

PURPOSE:To facilitate the on/off operation of lighting by containing an image pickup camera into a housing together with a talking circuit means and providing a lighting control means for controlling the lighting of an infrared lighting means provided additionally to allow a door phone master set to display the video image picked up by the image pickup camera. CONSTITUTION:When a visitor depresses a pushbutton 12 to operate a switch 38, a door phone unit is operated to apply calling and talking. Further, a call circuit 39 activates a camera synchronizing signal generating circuit 27 to light an infrared emitting diode 18 via a signal amplifier circuit 28. When talking is finished and a handset 40 of the door phone master set 2 is restored to the original position, a handset detection circuit 29 provided to the monitor TV detects it to give an off-signal to the circuit 27, which is stopped to stop the lighting state of the diode 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a door intercom slave unit used by a visitor to enable him to talk to his family members indoors.

(Background Art) Conventionally, it has been proposed to integrate the imaging camera 4 into the doorbell slave unit 1, but in such a conventional example, a monitor TV 3 is provided on the side of the doorphone slave 2, and when there is a visitor,
The image taken by the imaging camera 4 on the side of the doorphone slave 1 is displayed on the monitor TV 3, so that the face of the visitor can be confirmed. However, at night, etc., when the illuminance of the installation part of the door intercom slave 1 falls below the minimum illuminance of the imaging camera 4, the image becomes too dark and it becomes impossible to see the visitor's face on the monitor TV 3. Therefore, conventionally, as shown in FIG. 5, an illumination light 5 is installed around the installation part of the intercom slave unit 1, and the illumination light 5 illuminates visitors and the like to obtain the necessary illuminance. In this case, when the visitor presses the call button 7 and turns on the switch 38, the call circuit 39 shown in FIG. 6 detects this and operates the imaging camera 4 and also drives the lighting circuit 24. The lighting lamp 5 is turned on to start monitoring by the monitor TV 3, and when the call ends and the handset 40 on the door phone 2 side is returned, the operation of the imaging camera 4 is automatically stopped. However, in order to turn off the illumination light 5, it is necessary to operate the manual switch 6 provided on the doorbell 2 to turn off the illumination lighting circuit 24, which is cumbersome to operate and requires wiring for the off operation. Met. Furthermore, when a visitor arrives, the lighting lamp 5 is suddenly turned on, which causes a problem of giving the visitor a strong sense of discomfort.

(Objective of the Invention) The present invention uses an infrared ray-compatible image sensor in an imaging camera, thereby making it possible to use infrared light emitting means as illumination, so that it does not cause discomfort to visitors even in low-light conditions such as at night. The object of the present invention is to provide a door handle that allows easy turning on and off of lighting.

(Disclosure of the Invention) Figures (a) to (c) show detailed internal views of an embodiment of the present invention, Figure 2 is an overall configuration diagram including the doorbell doorbell shown above, and Figure 3 is the image pickup camera shown above. 4 is an enlarged perspective view of the essential parts of the main body portion of No. 4, and FIG. 4 shows a block diagram of the entire circuit of the same. First, an example of the configuration of the door punch 1 according to an embodiment of the present invention will be explained with reference to FIG. 1. In this embodiment, the housing 33 includes a cover 34, a body 8, a base 9, and a terminal fitting 10.
, a terminal screw 11 and a push button 12, and this housing 33
An imaging camera 4 and an intercom unit 35 are configured inside. The imaging camera 4 is formed by integrally fixing an optical unit 13 such as a lens and a printed board 14 with a COD or MO3 surface image sensor 36 attached as shown in FIG. The spring 15 is used to maintain an appropriate distance between the optical unit 13 and the MO3 solid-state image sensor 36 on the printed board 14.

An infrared light emitting diode 18 for illumination is soldered to a printed board 17 placed on the side of the optical unit 13, and even if this printed board 17 and the printed board 14 are integrated as shown in FIG. good. Next, the speaker 37 on the side of the door phone unit 35 is thermally fixed to the cover 34 via a waterproof gasket 19, and the push button 12, which has a light emitting diode 32 for position display in the center, moves in the direction F2 with F1 as the axis in the figure. It is configured in a piano-like manner so as to be pushed up by a spring 20 at all times. In this way, the switch 38 mounted on the printed board 21 for the doorphone circuit is pressed in against the spring force of the spring 20, so that the rib 22 of the push button 12 becomes the operating button 2 of the switch 38.
3, and the printed board 21 is fixed to a boss protruding from the cover 34. Furthermore, the side portions of the printed board 21 are for the control circuit of the imaging camera 4, and unlike the case where a vidicon is used, M
In the case where the O3 type solid-state image element 36 is used, since the control circuit 25 can be placed separately from the optical system, the control circuit 25 can be placed on the side of the optical unit 13 for the purpose of making the imaging camera 4 thinner. A control circuit 25 is mounted on a side portion of this printed board 21. Further, the microphone 26 on the side of the door phone unit 35 is housed in the cylindrical portion 30 of the cover 34 rf1.

Next, the above-mentioned infrared light emitting diode 18 constitutes the illumination means of the imaging camera 4 in this embodiment, and as shown in FIG. The circuit of the infrared light emitting diode 18 is driven by the output amplified by the amplifier circuit 28. In this way, the infrared light emitting diode 18 is configured to emit light intermittently in synchronization with the video signal of the imaging camera 4, thereby making it possible to emit high-intensity light without flickering.

When a visitor operates the push button 12 and the switch 38, the door phone unit 35 described above is activated to perform a calling operation and a conversation operation, and the calling circuit 39 is activated.
operates the camera synchronization signal generation circuit 27, and the infrared light emitting diode 1 is
8 to emit light.

After this, when the call ends and the handset 40 on the door phone 2 side is returned to its original position as shown in FIG. 2, the handset detection circuit 29 provided on the monitor TV side detects the OFF signal. The signal is sent to the signal generation circuit 27 to stop the operation of the camera synchronization signal generation circuit 27, thereby stopping the light emitting state of the infrared light emitting diode 18. still,
An infrared transmitting filter 31 is attached to the front surface of the optical unit 13 and the infrared light emitting diode 18, so that the presence of the imaging camera 4 cannot be identified from the outside.

(Effects of the Invention) As described above, the present invention forms an imaging camera consisting of an optical system consisting of an infrared ray-compatible image sensor and an optical lens in front of the image sensor, and a control circuit arranged around this optical system. Since this imaging camera is installed in the housing along with the communication circuit means, visitors are not made aware of the imaging camera, and even in low light conditions such as at night, visitors can be It is capable of illuminating the visitor without causing discomfort to the visitor, and is further equipped with a light emitting control means for controlling the light emission of the infrared light emitting means, so that when the visitor operates the call button, the doorbell is turned off when the call ends. Since the infrared light emitting means is made to emit light until the handset is returned, the infrared light emitting means can be turned on and off automatically during a call, providing good operability. It has the advantage of not requiring any switches or wiring.

[Brief explanation of the drawing]

FIG. 1(a) is a front perspective view of one embodiment of the present invention;
b) is a rear view of the main parts with the base etc. removed, and the same figure (e)
) is a side sectional view of the same as above, Fig. 2 is an overall schematic configuration diagram of the door phone system with a TV monitor as above, Fig. 3 is an enlarged perspective view of the main part of the optical unit section of the above, and Fig. 4 is a main part of the same as above. The block diagrams of the circuit, FIGS. 5 and 6, are respectively the conventional example T.
1 is an overall schematic configuration diagram and a circuit block diagram of a door phone system with a V monitor, in which 1 is a V phone slave unit, 2 is a door phone phone, 4 is an imaging camera, 12 is a push button, 29 is a handset detection circuit, 33 is a housing, 36 is an MO3 type solid-state image sensor, and 40 is a handset. Agent Patent Attorney Stone 1) Invasion 7 Figure 1 (a) Figure 1 (b) Figure 1 (C) Figure 2 □ Figure 3 1st

Claims (1)

[Claims] (1) An optical system consisting of an infrared ray-compatible image pickup device and an optical lens in front of it, in a doorphone slave device placed around the entrance and used by visitors to talk to family members on the doorphone parent side indoors; An imaging camera is formed from a control circuit arranged around this optical system, and this imaging camera is installed in a housing together with a communication circuit means, and a light emission control means for controlling the light emission of an attached infrared light emission means is provided. The infrared emitting means is made to emit light from the time the visitor presses the call button until the handset of the doorbell main unit is returned at the end of the call, and the image taken by the imaging camera is displayed on the doorbell main unit. A doorphone slave unit characterized by a projection.