JPH07114491B2 - Doorphone subunit with TV camera - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a door-phone subunit with a television camera, which is embedded in and attached to a wall of a house, such as a gatepost or entrance.

[Background Art] FIG. 4 shows a doorphone subunit of a conventional example. This type of doorphone subunit is attached to a wall surface of a gate, entrance, etc. of a house, and as shown in FIG. A television camera, that is, a solid-state image pickup element 4 such as a CCD element is arranged in the upper part of the main body of the slave unit, and infrared light-emitting elements such as light-emitting diodes for a lot of infrared illumination are provided on both sides of the solid-state image pickup element 4. 9 are provided. A smoke filter 10 is provided on the front side of the solid-state image pickup device 4 and the infrared light emitting device 9 so as not to be seen from the outside. The intercom subunit shown in FIG. 4 is a so-called camera fixed type in which the solid-state image sensor 4 is fixed. In this case, the smoke filter 10 and the lens 7 provided on the front surface of the solid-state image sensor 4 are in close contact with each other. Therefore, the smoke filter 10 of the infrared light emitting element 9
There is no particular problem due to the reflected light from the inner surface of the.

However, a problem arises when the camera is movable as shown in FIG. That is, FIG. 5 shows that the printed board 8 on which the infrared light emitting element 9 is mounted and the printed board 5 on which the solid-state image sensor 4 is mounted are integrally configured, and the printed board 5 is fixed by the movable metal fittings 23 from both sides. The movable metal fitting 23 is supported by the fixed metal fitting 22 and the caulking pin 25, and the lever 23a for adjusting the angle formed at the front end of the movable metal fitting 23 is operated to operate the solid imaging device 4 with the caulking pin 25 as an axis. And the infrared light emitting element 9 was movable. In the case of such a movable type, since a space is required between the lens 7 and the smoke filter 10, infrared light from the infrared light emitting element 9 passes through the space, and the infrared light from the infrared light emitting element 9 passes through the space of the smoke filter 10 as shown by an arrow in the figure. There is a problem that the light is reflected on the inner surface and the reflected light enters the lens 7 and becomes an obstacle.

[Object of the Invention] The present invention has been provided in view of the above points, and a television camera for preventing the reflected light of the infrared light emitting element by the inner surface of the smoke filter from entering the television camera. It is intended to provide a doorphone sub unit with a door.

DISCLOSURE OF THE INVENTION (Structure) The present invention relates to a child device having a call function such as a TV camera for monitoring and a speaker, which is installed outdoors, and an image signal from the child device installed indoors. And an infrared light placed on the side of the TV camera, which is a sub-unit in an intercom consisting of a main unit that can communicate with the visitor while watching the video of the visitor by an audio signal. And an infrared light emitting element for use in a television camera and a smoke filter arranged on the front side of the television camera and the infrared light emitting element to hide the infrared light emitting element and the television camera, and on the inner surface side of the smoke filter and the light emitting element and the television camera. It is characterized in that it is provided with a rib which is disposed between and to prevent the reflected light of the infrared light emitting element by the inner surface of the smoke filter from entering the television camera.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

First, the overall configuration of the child device main body A will be described with reference to FIG. 1 (a) is a cross-sectional view seen from above, FIG. 1 (b) is a perspective view seen from the front, and FIG. 1 (c) is a side cross-sectional view. The housing 1 is composed of a body 2 and a cover 3. A transparent window 20 is opened in the upper part of the housing 1, and a camera unit is installed corresponding to the transparent window 20. This camera unit includes a solid-state image pickup device 4 such as a CCD device attached to a printed board 5, a camera unit 6 such as an optical and image pickup unit provided on the front surface of the solid-state image pickup device 4, and a lens 7.
Etc. A large number of infrared light emitting elements 9 mounted on the printed board 8 are arranged on both sides of the camera section. A smoke filter 10 is arranged in front of the lens 7 and the infrared light emitting element 9. In the lower part of the housing 1, a printed circuit board 12 having a video circuit section for processing a video signal from the solid-state image sensor 4 mounted thereon and fixed by a boss 21, a speaker 11 and the like are provided. A large number of long holes 19 are formed in the cover 3 on the front surface of the speaker 11. A mounting frame 16 and a surface plate 17 are located on the front surface of the housing 1, and the surface plate 17 is fixed to the front surface of the wall surface B by fixing screws 18. A push button 14 for calling and a microphone 15 are provided on the front surface of the housing 1. The master unit that can talk with the main unit A is installed indoors, and the main unit can talk while watching the image of the visitor by the video signal and the audio signal from the main unit A. There is.

Next, the movable adjusting means for rotating the infrared light emitting element 9 and the solid-state image pickup element 4 within a desired range will be described with reference to FIGS.
It will be described with reference to the drawings. The end of the L-shaped fixing bracket 22 is a screw
It is fixed to the body 2 by 24, and a counter sink 26 is provided on this fixing metal fitting 22, and a hole of the movable metal fitting 23 is inserted into this counter sink 26 so that the movable metal fitting 23 is supported on the outer circumference of the counter sink 26. The printed board 5 is fixed by a screw 29 at one end of the movable fitting 23, and the other end is used as an angle adjusting lever 23a. The printed board 5 on which the solid-state image sensor 4 is mounted and the printed board 8 on which the infrared light emitting element 9 for infrared illumination is mounted are fixed by a spacer 30 with a predetermined space.

Then, the countersink 26 of the fixing bracket 22 and the disc spring 27
Insert the movable metal fitting 23, then insert the disc spring 28
Insert the caulking pin like a semi-tubular rivet
Insert the 25 and crimp the crimp pin 25
23 is rotatably supported. Here, even if the caulking portion of the caulking pin 25 is loosened due to the sliding of the movable metal fitting 23, a constant contact pressure is always obtained by the disc springs 27 and 28, and the operating force of the lever 23a does not change. This lever 2
When the movable metal fitting 23 is rotated by the operation of 3a, both the printed boards 5 and 8 fixed to the movable metal fitting 23 are rotated accordingly, so that the illumination range of the infrared light emitting element 9 and the solid-state image sensor 4 are increased. The imaging range of can be set to a desired range. Further, the position of the solid-state image pickup device 4 can be arbitrarily rotated and set, and the solid-state image pickup device 4 can be stopped at that position by the contact pressure of the disc springs 27 and 28, and there is no need to separately provide a mechanism for stopping. is there.

Next, the gist of the present invention will be described. As shown in FIG. 1A, ribs 31 and packing 32 are provided on the inner surface of the smoke filter 10 at the boundary between the lens 7 and the infrared light emitting element 9. That is, the cover 3
As described above, the transparent window 20 is opened, and the two ribs 31 are integrally formed in the transparent window 20, and the smoke filter 10 is arranged in the transparent window 20. For,
The packing 32 is interposed between the front surface of the rib 31 and the back surface of the smoke filter 10. The reflected light of the smoke filter 10 of the light emitted from the infrared light emitting element 9 by the rib 31 is blocked by the rib 31 and the reflected light does not enter the lens 7. Therefore, even if the infrared light emitting device 9 and the solid-state imaging device 4 are rotated in any direction by the lever 23a, the rib 31 is always positioned between the lens 7 and the infrared light emitting device 9. Due to the smoke filter 10, the reflected light of the infrared light emitting element 9 does not enter, and the solid-state imaging element 4
It provides the best monitoring at any angle position. Further, as described above, since the printed board 8 on which the infrared light emitting element 9 for night vision is mounted and the printed board 5 on which the solid-state imaging element 4 is mounted are integrated by the spacer 30, the imaging and the infrared illumination are performed. It can be changed at the same time and can be monitored in a dark place at any position within the adjustable range.

[Effects of the Invention] As described above, in the present invention, the smoke filter hides the television camera and the infrared light emitting element, and the smoke is disposed on the inner surface side of the smoke filter and between the infrared light emitting element and the television camera. Since a rib is provided to prevent the reflected light of the infrared light emitting element from the inner surface of the filter from entering the TV camera, the reflected light reflected by the smoke filter is blocked by the rib and does not enter the TV camera. Therefore, even if the television camera is fixed or movable, the best monitor can be obtained.

[Brief description of drawings]

1 (a) to 1 (c) are sectional views, perspective views and side sectional views of an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are operation explanatory views and sectional views of the same, and FIG. FIG. 4 (a) and FIG. 4 (b) are an enlarged cross-sectional view of the same as above, and FIG. 4 (a) and FIG. Reference numeral 4 is a solid-state image sensor, 10 is a smoke filter, 11 is a speaker, and 31 is a rib.

Claims (1)

[Claims] 1. A visitor's image by a child device having a call function such as a television camera for a monitor and a speaker, which is installed outdoors, and an image signal or audio signal from the child device which is installed indoors. A child device in an intercom consisting of a parent device that can talk with a visitor while watching
A television camera, an infrared light emitting element for infrared illumination arranged on the side of the television camera, and a smoke filter arranged on the front side of the television camera and the infrared light emitting element to hide the infrared light emitting element and the television camera. And a rib disposed on the inner surface side of the smoke filter and between the light emitting element and the television camera to prevent the reflected light of the infrared light emitting element from the inner surface of the smoke filter from entering the television camera. Doorphone subunit with TV camera.