JPH0537831A - Intercom slave set with camera - Google Patents

Abstract

PURPOSE:To prevent generation of a virtual image due to an infrared ray emitting element at image pickup at night in the intercom slave set with a camera with an infrared ray dark-field camera mounted thereon. CONSTITUTION:A infrared ray dark-field camera 6 at the surrounding of which luminous use infrared ray emitting elements 13 is arranged is built in a spherical camera unit 7 in which the part corresponding to a camera lens 8 is formed to be a flat face 20, the camera unit 7 is moved for adjustment in the vertical and horizontal directions toward the inside of a curved face filter 33 provided to an opening window of the intercom slave set main body and an infrared ray shield section 50 is provided around the flat face 20 of the camera unit 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an improvement of a door intercom with a camera, and when infrared rays are used for night illumination, it is possible to prevent the image from being difficult to see due to reflection of the infrared rays on the inner surface of the camera unit or the filter. It has a characteristic structure.

[0002]

2. Description of the Related Art Recently, an intercom system with a monitor television has been developed and used so that the appearance of a call can be confirmed when a call is made to a visitor to a dwelling unit. FIG. 5 shows a schematic configuration of such an intercom system, which includes an intercom subunit 37 provided with a call button 37a provided at the entrance and an intercom master unit 38 on the indoor side.
When a telephone call is made between the two, an intercom slave 37 is provided with a built-in camera unit having an infrared night-vision camera, and an image of the visitor is displayed on the monitor TV 39 of the intercom master 38 on the indoor side. It is a thing.

By the way, in such an intercom system, since it is necessary to accurately capture the appearance of a visitor with the camera unit of the intercom subunit 37, the viewing angle of the camera unit 7e is adjusted as shown in FIG. Something that can be done is being developed. In this conventional device, a camera unit 7e having a camera lens 8e and the like is attached to a housing 1e.
It is mounted inside and supports the camera unit 7e so as to be vertically swingable around an appropriate member such as a pin 40 as a fulcrum. The elastic force of the tension spring 41 is constantly applied to the upper end side of the camera unit 7e. The lower end side of the camera unit 7e is brought into contact with the angle adjusting screw 42.

Therefore, in such a structure, the vertical tilt of the camera unit 7e can be adjusted by adjusting the angle adjusting screw 42 from the front side of the intercom subunit 37, and the mounting height of the intercom subunit 37 can be adjusted. The vertical viewing angle of the camera unit 7e can be adjusted to move the image pickup range up and down arbitrarily without changing (see arrow in FIG. 6).
However, the viewing angle of the camera unit 7e could not be adjusted in the horizontal direction. Therefore, for example, as shown in FIG. 7, when the intercom subunit 37 is attached to the side wall 44 of the entrance door 43, the visitor M presses the call button 37a of the intercom subunit 37 at the position A. After moving away from the front of the intercom child device 37 and moving to the position B on the front of the door, the visitor M is outside the imaging range S of the camera,
Sometimes it was not possible to accurately capture the appearance of the visitor M.

Therefore, the applicant of the present invention constructed an infrared night-vision camera and a camera unit accommodating an infrared light-emitting element for night illumination around the infrared night-camera into a spherical body, and the front part of the camera unit was a doorphone subunit. We proposed a door intercom with a camera that can be moved like an eyeball by protruding from the main body, and the head of the protruding spherical camera unit can be adjusted to move vertically and horizontally in the horizontal direction by hand. When the camera unit is formed into a spherical body as shown in FIG. 8, the filter 33 attached to the front face of the intercom sub-unit 37 also has a central portion corresponding to the shape of the spherical camera unit (not shown) as shown in FIG. It must be formed into a protruding curved surface. With such a structure, the infrared light emitting elements 1 arranged around the infrared night vision camera 8e as shown in FIG.
The light radiated from the light source 3 has a flat surface 7d of a camera unit 7e having an infrared night vision camera built-in and a curved surface filter 4
The virtual image 13 ′ reflected by the inner surface of 5 is focused by the camera lens 8 f of the infrared night-vision camera 8 e and focused on the internal CCD substrate 8 g. As a result, as shown in FIG. 10, since the virtual image 13 ′ of the infrared light emitting element is displayed around the face of the visitor M on the monitor screen 39 of the intercom master unit 38 installed in the room, the image is unnatural. It is difficult to see.

The present invention proposed in view of the above circumstances has an object to prevent a virtual image from being projected due to reflected light of an infrared light emitting element for night illumination housed in a camera unit of a door intercom with camera. ..

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention proposed in claim 1 is an infrared night-vision camera in which infrared light emitting elements for illumination are arrayed, and a portion corresponding to a camera lens. With a spherical body having a flat surface, and the camera unit can be vertically and horizontally moved and adjusted inside the curved filter provided in the opening window of the intercom subunit. This is an improvement of the above, and has a structure in which an infrared ray shielding portion is formed around the flat surface of the camera unit.

[0008]

According to the door intercom subunit with a camera of the present invention, the flat surface corresponding to the camera lens of the camera unit formed on the spherical body has a structure for blocking infrared rays. It is absorbed in that part. Therefore, there is no occurrence of an unnecessary infrared virtual image around the image due to reflection on the camera lens side.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a vertical cross-sectional view showing the configuration of an intercom subunit according to an embodiment of the present invention. In the same figure, the housing 1 of the intercom subunit is constructed by detachably attaching the decorative cover plate 3 to the main body base 2 made of synthetic resin and having an opening in the front through the inner lid 35. The main body base 2 and the decorative cover plate 3 may be detachably coupled by engagement in addition to screws or the like.

An exploded perspective view of the intercom child device of the present invention is as shown in FIG. 2. The decorative cover plate 3 of the child device is shown in FIG.
Is provided with an opening window 4 provided with a curved filter 33 (a smoke filter for transmitting infrared rays) for preventing the presence of the infrared night-vision camera 6 from the outside, and the inner lid 35 is aligned with the opening window 4. A window hole 35a and a call button 5 are provided, and a wiring connection terminal (not shown) for connecting to an indoor intercom master unit (see FIG. 5) with a signal line is provided on the back side. The spherical camera unit 7 arranged in the upper part of the housing 1 includes a rear half spherical portion 16 forming a rear portion of the camera unit and a front hemisphere accommodating an infrared night-vision camera 6 forming a front portion of the camera unit 7. It is configured by integrally combining the portion 16a.

The detailed construction of the camera unit 7 is shown in FIG. 4, but the infrared night-vision camera 6 has a camera lens 8
C sensitive to infrared and visible light focused by
It is configured by combining with a CD substrate or an image pickup unit 9 in which a MOS type solid-state image pickup device is mounted inside, and the light passing through the lens 8 is set to form an image on the CCD substrate in the image pickup unit 9. The control circuit such as CCD substrate is the camera unit 7
Is mounted on a printed circuit board 12 arranged behind a speaker (not shown) housed under the housing 1 in order to reduce the thickness.

On the lower side of the camera unit 7, an infrared light emitting diode 1 is provided as an infrared light emitting element for night illumination.
3 are provided in plural number, and the respective lead terminals of these light emitting diodes 13 are connected by soldering or the like to a printed circuit board (not shown) mounted on the upper surface of the support base 18 housed inside the camera unit 7. Then, the light emitting diode 13 is, as shown in FIG.
Each of the insertion holes 10 of the pistol revolver-like light emitting element holding base 10 in which a plurality of insertion holes 10a are formed in the periphery for supporting the
It is inserted and held in a.

The spherical camera unit 7 includes a rear spherical portion 1
The front hemispherical portion 16a made of a transparent member is integrally connected to the front of 6, but the portion corresponding to the camera lens 8 has a flat surface 20 in order to avoid image distortion due to refraction of light. The infrared light shielding portion 50 is formed by attaching an infrared light shielding sheet or applying an infrared light shielding paint to the peripheral portion thereof.

FIG. 3 illustrates the effect of the present invention in comparison with FIG. 9, and the irradiation light from the infrared light emitting elements 13 arranged around the infrared night vision camera 6 is the camera of the camera unit 7. Since the infrared light shielding portion 50 provided around the flat portion 20 formed corresponding to the lens 8 absorbs the virtual image 13 ′ as shown in FIG. 9, the intercom master device 38 is not generated. The virtual image of the light-emitting element does not appear on the monitor screen 39 of the above, and the image displayed on the monitor screen 39 of the intercom master unit 38 can be easily viewed. When the infrared light shielding portion 50 is formed by such a method, it can be formed into a thin and smart structure without being bulky. Reference numeral 22 shown in FIGS. 1 and 2 is a light-shielding cylinder, which shields infrared rays from the inside of the front surface of the front hemisphere portion 16a of the camera unit 7 so as to cover the periphery of the camera lens 8. However, in the present invention, such a light blocking tube 22 does not necessarily have to be provided. Further, in the example shown in FIGS. 1 and 2, the collar portion 21 of the light shielding tube 22 is provided on the inner surface of the front hemisphere portion 16a of the camera unit 7 on the inner surface of the front hemisphere portion 16a of the spherical body camera unit 7. It is engaged so as to be fitted into an opening step portion 36a formed in the center of an inner shell 36 made of an infrared transmission filter arranged along the same. Also serves to conceal the infrared night-vision camera 6. The spherical body camera unit 7 having such a structure is received by a spherical-shaped receiving body 24, which will be described later, provided in the main body base 2, and looks like an eyeball, and the head portion of the inner lid 35 is positioned more than the opening window 35a. The pressing frame 3 formed in the main body base 2 so as to project.
The side surface is supported by the edge of the first opening 31b.

On the other hand, a spherical concave portion 23 is formed on the inner surface of the main body base 2 corresponding to the latter half spherical portion 16 of the camera unit 7, and between the spherical concave portion 23 and the latter half spherical portion 16 of the camera unit 7. The thin spherical receiving member 24 forming a part of the support adjusting mechanism 40 is slidably interposed. This will be described in detail with reference to FIG. A pair of ridges 26, 26 projecting from the bottom surface of the rear half spherical portion 16 of the camera unit 7 are slidably fitted in the recessed grooves 25, 25. On the other hand,
In the spherical concave portion 23 of the main body base 2, two concave grooves 27, 27 having a predetermined length are formed in the vertical direction, that is, in the direction orthogonal to the camera unit 7 in order to regulate the vertical movement adjustment range. A pair of convex ridges 2 that are formed along the concave groove 27, 27 and are projected on the bottom surface of the spherical receiving body 24.
8, 28 are slidably fitted. Therefore, the camera unit 7 can be slid vertically and horizontally in the horizontal direction by the spherical receiving body 24.

Further, in order to receive the spherical receiving member 24, three holes 29 are formed in the spherical concave portion 23 formed in the inner surface of the main body base 2, and a spherical surface is formed inside each of these holes 29. Springs 30 and three pressing support pins 34 for constantly pressing and urging the shape receiving body 24 and the rear half spherical portion 16 upward.
Each of the holes 29 is formed with a positioning hole 29a into which a positioning convex piece 34a formed under the pressing support pin 34 is fitted. The elastic biasing means is
In the embodiment, the pressing support pin 34 is attached with the spring 30. Then, a curved surface portion 34b that matches the curved surface of the spherical receiving body 24 is formed on the upper surface of the pressing support pin 34.

Since the support adjusting mechanism 40 of the spherical camera unit 7 has such a structure, the bottom of the spherical camera unit 7 is set in the groove set 25, 25 of the spherical receiver 24. When the set of convex portions 26, 26 formed in the above is fitted, the spherical camera unit 7 is pressed toward the holding frame 31 side by the elastic force of the spring 30, and thereby the opening window 35a of the inner lid 35 is formed. With the head protruding further,
In other words, it looks just like an eyeball, and its side part is open window 3
It is supported and positioned by the side edge of 5a. In order to ensure the positioning in this case, the opening window 35 of the inner lid 35
A rubber material (not shown) is attached to the edge of a to apply a frictional force to the side surface of the camera unit 7. Such an intercom subunit of the present invention has the light emitting diode 1 at night.
Imaging can be performed by causing 3 to emit light and irradiating visitors with the infrared light.

According to the camera unit having such a structure, first, the decorative cover plate 3 is removed from the main body base 2 and the front hemisphere portion 16a of the spherical camera unit 7 is pressed by hand to resist the elastic force of the spring 30. If a gap is generated between the pressing unit 31 and the pressing frame 31, the camera unit 7
Can rotate freely in either the vertical direction or the horizontal direction, so if you set the spherical camera unit 7 to proper positioning and then release your hand from the camera unit 7,
The side surface of the camera unit 7 is pressed and pressed by the pressing frame 31 by the elastic force of the spring 30 to be fixedly positioned. Therefore, according to the present invention, the direction of the camera unit 7 can be easily changed and the positioning can be set in such a manner. The imaging area of the night-vision camera 6 can be moved and changed vertically and horizontally.

Although the outer shape of the camera unit 7 is formed into a substantially spherical shape in the above embodiment, the present invention is not limited to this. For example, it suffices to form only a part required for the spherical sliding guide into a spherical shape and form the other part into an aspherical shape. The camera unit 7 according to the present invention refers to a unit including the infrared night-vision camera 6, and is not necessarily limited to the form of the above embodiment. In addition, the present invention is not limited to the specific configuration of the infrared night-vision camera 6, and the specific configuration of each part can be arbitrarily changed in design.

[0020]

According to the intercom sub-unit with a camera of the present invention, the portion corresponding to the camera lens of the camera unit formed on the spherical body is formed on the flat surface, so that the infrared light for illumination is reflected. It is difficult to do so, so there is little image distortion.
In addition, since the infrared light shielding part is provided on the peripheral part of the flat surface corresponding to the camera lens of the camera unit with the built-in infrared night vision camera, the irradiation light from the infrared light provided around the camera lens is directly emitted from the camera. The infrared light that does not enter the lens and is reflected by the filter surface after passing through the spherical body camera unit is also prevented from entering the camera lens. For these reasons, a virtual image does not appear around the image of the intercom base unit, which makes it difficult to see the image.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional structural view showing a main part configuration of an intercom subunit with a camera of the present invention.

FIG. 2 is an exploded perspective view of the intercom subunit with camera of the present invention.

FIG. 3 is a diagram for explaining the operation of the infrared ray shielding portion in the intercom subunit with camera of the present invention.

FIG. 4 is an explanatory diagram showing an example of a support mechanism of a camera unit.

FIG. 5 is a schematic configuration diagram of an intercom system with a monitor television.

FIG. 6 is a vertical cross-sectional view of a conventional intercom subunit with a camera.

FIG. 7 is a diagram for explaining a problem of the conventional intercom subunit with a camera.

FIG. 8 is a plan view of a camera-equipped intercom sub-unit in which a spherical body camera unit is incorporated.

FIG. 9 is a diagram illustrating a principle of generating a virtual image due to internal reflection in an intercom subunit with a camera including a spherical body camera unit.

FIG. 10 is a diagram illustrating a state in which a virtual image of the infrared light emitting element appears on the monitor screen of the intercom master unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Main body base 6 ... Infrared night vision camera 7 ... Spherical camera unit 8 ... Camera lens 10 ... Light emitting element holding base 10a ... Hole 13 ... Infrared light emitting diode 16 ... Spherical body latter half sphere portion of camera unit 16a ... Spherical body camera unit front hemisphere portion 17 ... Spherical concave portion of spherical receiver 20 ... Camera Flat surface formed on the front hemisphere of the unit 22 ... Light-shielding cylinder 23 ... Spherical concave portion 25, 27 ... Groove 26, 28 ... Convex portion 30 ... Spring 31 ... Holding frame 33 ... Curved filter 36 ... Inner shell made of infrared transmitting filter 36a ... Opening step portion 40 ... Support adjusting mechanism 50 ... Infrared light shielding portion

Claims (1)

Claim: What is claimed is: 1. An infrared night-vision camera in which infrared light-emitting elements for illumination are arrayed, is built in a spherical camera unit having a flat surface corresponding to a camera lens. In a doorphone subunit with a camera capable of vertically and horizontally moving and adjusting the camera unit inside a curved filter provided in an opening window of an intercom subunit, an infrared ray shield is provided around a flat surface of the camera unit. Door phone subunit with camera that has a structure that forms a part.