JP5997014B2 - Intercom device with a camera with a function to prevent external illumination light from being reflected - Google Patents

Description

  The present invention relates to an interphone apparatus equipped with a calling means and a camera, and more particularly to an interphone apparatus having a function of eliminating the reflection of external illumination light from a camera image.

  2. Description of the Related Art Conventionally, in an intercom device incorporating a camera and a lighting fixture, a technique for preventing internal illumination light from entering the camera is known. For example, Patent Document 1 discloses a translucent transparent device that conceals a camera on the front surface of a housing in an intercom handset in which a housing includes an infrared light emitting element that illuminates a visitor and a camera that captures the illuminated visitor. A technology that eliminates the reflection of internal illumination light from the camera image by attaching a light cover and blocking the infrared light reflected by the inner surface of the translucent cover by a rib protruding from the inner surface so that it does not enter the camera. Have been described.

Japanese Patent Publication No.7-114491

  However, since entrance halls for apartments (collective entrance machines) do not have built-in lighting fixtures, they illuminate the subject with light from externally installed lighting fixtures, so some of the external illumination light from the camera There was a problem of being incident on the lens. For example, as shown in FIG. 6A, when the collective entrance 1 is installed on the inclined table 8 or the wall surface and the lighting fixture 9 is installed on the ceiling, the direct light L of the illumination light enters the camera 5. As shown in FIG. 6B, the ghost G may appear in the monitor 10 of the intercom master unit installed in the living room or the management room, and the subject (visitor) O may be unclear.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an intercom device that can prevent external illumination light from being captured and can clearly shoot a subject image with a camera.

  In order to solve the above-mentioned problems, the present invention provides an interphone device in which a housing is equipped with a calling means and a camera, a lens of the camera is covered with a translucent cover, and an object illuminated by an external lighting apparatus is imaged by the camera. The following means are provided.

(1) A lens cover is attached to the lens of the camera, and an opening for allowing reflected light from the subject to enter the lens and a light-shielding portion for blocking direct light from the lighting fixture from entering the lens are provided on the lens cover. An intercom device characterized by that.

(2) The interphone device, wherein the opening of the lens cover is formed in a circular shape that exposes the spherical surface of the lens, and the light shielding portion is formed so as to block a part of the opening outside the imaging range of the camera. .

(3) The housing includes a window hole that exposes the front surface of the lens cover to the inside of the translucent cover, and a support portion that tiltably supports the lens cover, and an opening and a light shielding portion are formed on the front surface of the lens cover. An intercom device characterized by comprising:

(4) The intercom apparatus, wherein the light shielding portion includes a ridge that protrudes forward from the front surface of the lens cover.

(5) The intercom apparatus, wherein the hook is formed so as to extend in a horizontal direction at an upper portion of the lens cover.

(6) An intercom apparatus characterized in that the light-shielding portion and the collar are formed integrally with the lens cover.

(7) An intercom apparatus characterized in that the light shielding portion is formed integrally with the lens cover, and the collar is bonded to the front surface of the lens cover.

  According to the intercom apparatus of the present invention, the lens cover is provided with the opening and the light shielding portion, the reflected light from the subject is incident on the lens through the opening, and the direct light from the external lighting apparatus is blocked by the light shielding portion. Therefore, there is an effect that the external illumination light can be prevented from being reflected and the image of the subject can be clearly photographed by the camera.

It is a front view of the intercom device showing one embodiment of the present invention. It is a principal part fracture side view which shows the camera of the intercom apparatus of FIG. FIG. 3 is a component diagram illustrating a lens cover of the camera of FIG. 2. It is sectional drawing which shows the state which the camera of FIG. 2 tilted upwards. It is sectional drawing which shows the state which the camera of FIG. 2 tilted below. It is an installation figure of an intercom device explaining a subject of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. An intercom apparatus 1 shown in FIG. 1 is a collective entrance machine (see FIG. 6) installed at the entrance of a collective housing, and is equipped with a microphone 3 and a speaker 4 as a communication means and a camera 5 inside a housing 2. ing. A translucent translucent cover 6 that covers the camera 5 is attached to the front surface of the housing 2, and an operation unit 7 including a call button and a room number key is provided below the translucent cover 6. Then, a subject including visitors around the entrance machine is imaged by the camera 5, and the image is displayed on the monitor of the parent machine installed in the room or the management room, and between the visitor and the resident or the manager. Make a phone call.

  As shown in FIG. 2, the camera 5 is disposed between the front panel 12 and the rear panel 13 of the housing 2, and is supported so that the vertical tilt angle can be adjusted. The body 14 of the camera 5 is formed in a hemispherical shape, and the rear panel 13 is provided with a spherical concave portion 15 that supports the body 14 in a tiltable manner. An angle adjustment knob 16 projects from the back surface of the body 14, and a camera substrate 17 is fixed to the front surface of the body 14. An image sensor 19 and a lens 20 are held on the camera substrate 17 via a holder 18, and a lens cover 21 is attached to the lens 20. The front panel 12 is provided with a window hole 22 that exposes the front surface of the lens cover 21 to the inside of the translucent cover 6 and a support portion 23 that supports the lens cover 21 so as to be tiltable.

  As shown in FIG. 3, the lens cover 21 is formed in a cup shape that covers the lens 20, and an opening 25 and a light shielding portion 26 are formed on the front surface of the lens cover 21. The opening 25 is formed in a circular shape so that the spherical surface of the lens 20 is exposed, and allows reflected light from the subject O (see FIG. 6) around the entrance hall to enter the lens 20. On the other hand, the light shielding part 26 is formed so as to close the upper part of the opening 25 outside the imaging range of the camera 5 (vertical angle of view α shown in FIG. 2), and is installed on the ceiling of the entrance. The direct light L from 9 (see FIGS. 4 and 5) is blocked so as not to enter the lens 20.

  Further, a collar 27 is formed integrally with the lens cover 21 on the front surface of the light shielding part 26 so that the direct light L from a wider range can be shielded by the light shielding part 26 having a limited area. The collar 27 is formed so as to protrude forward (in the optical axis A direction of the lens 20) from the front surface of the lens cover 21 and to be elongated in the horizontal direction. Further, a shallow rectangular recess 28 is formed in the light-shielding portion 26 on the upper side of the collar 27, and a collar pad 29 made of a flexible material separate from the lens cover 21 is formed in the recess 28 as necessary. Glued. Note that the protrusion height of the flange 27 is about 0.5 to 1.5 mm, and the length of the flange 27 is in contact with the inner peripheral edge of the window hole 22 of the front panel 12 at the tilt upper limit position of the camera 5. It is set so as not to.

  According to the intercom apparatus 1 having the above configuration, the light shielding portion 26 of the lens cover 21 blocks the direct light L from the lighting fixture 9 at the tilt upper limit position of the camera 5 shown in FIG. The outer peripheral surface of the lens cover 21 blocks the direct light L. For this reason, even when the camera 5 is adjusted to any angle, the external illumination light is prevented from being reflected, and the image of the subject O can be clearly taken. Further, since the light shielding part 26 is provided outside the imaging range of the camera 5, there is no possibility that the light shielding part 26 itself is reflected. In particular, by providing the light shield 27 or the light pad 29 on the light shielding portion 26, it is possible to shield the direct light L from a wider range, and the intercom device 1 can be used as the entrance of various apartment houses where the installation location and direction of the lighting fixture 9 are different. Can be used as a general purpose machine.

  In addition, the intercom apparatus 1 of the present invention is not limited to an entrance unit of an apartment house, but includes various cameras such as an entrance unit of a detached house, a nurse call slave unit or a parent unit, and an indoor unit of a nursing facility. It can also be applied to an intercom device. In addition, the shape and configuration of each part can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Intercom apparatus 2 Housing 3 Microphone 4 Speaker 5 Camera 6 Translucent cover 9 Lighting fixture 20 Lens 21 Lens cover 22 Window hole 23 Support part 25 Opening part 26 Light-shielding part 27 ２９ 29 庇 Pad O Subject L Direct light

Claims (6)

In an interphone device that is equipped with a communication means and a camera in a housing, covers a lens of the camera with a translucent cover, and images a subject illuminated by an external lighting fixture by the camera,
A lens cover is attached to the lens, and an opening for allowing the reflected light from the subject to enter the lens and a light-shielding portion for blocking direct light from the lighting fixture from entering the lens are provided in the lens cover .
The interphone apparatus , wherein the opening is formed in a circular shape that exposes the spherical surface of the lens, and the light shielding portion is formed so as to block a part of the opening outside the imaging range of the camera . The housing includes a window hole that exposes the front surface of the lens cover to the inside of the translucent cover, and a support portion that tiltably supports the lens cover, and the opening portion and the light shielding portion are provided on the front surface of the lens cover. The intercom apparatus according to claim 1 formed. The intercom apparatus according to claim 2, wherein the light shielding portion includes a ridge protruding forward from the front surface of the lens cover. The intercom apparatus according to claim 3, wherein the hook is formed to extend in a horizontal direction at an upper portion of the lens cover. The intercom apparatus according to claim 4, wherein the light shielding portion and the hook are integrally formed on the lens cover. The intercom apparatus according to claim 4, wherein the light shielding portion is formed integrally with the lens cover, and the collar is bonded to the front surface of the lens cover.

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