JPH0330582A - Lighting device for door camera - Google Patents

Abstract

PURPOSE:To make forming a fitting hole for a lighting device in a door body unnecessary by arranging a cylindrical light guide body around a camera mechanism inserted into the fitting hole formed as passing through the inside and the outside surfaces of a building, and arranging a light source at the inner end part of this light guide body. CONSTITUTION:A collar 8 to hold the lens of the group 4 of the camera mechanism 3 is screwed in a screw hole 7 formed as passing through in an axial direction at the central part of the cylindrical light guide body 6 made of translucent material such as acrylic resin and polycarbonate resin, etc., and the light guide body 6 is arranged around the camera mechanism 3. Since light from the light source 12 arranged at the inner end surface of the light guide body 6 is transmitted through the light guide body 6, and illuminates a subject by irradiating it with light from its front side, a favorable video image can be obtained without causing a shadow. Then, it is unnecessary to form the hole for the lighting device in the door body 1 separately from the camera mechanism 3, and the lighting device can be easily installed together with the camera mechanism 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an illumination device for a door camera, and more particularly to illumination for photographing a subject.

(Prior Art) Conventional illumination for photographing with this type of door camera uses a gate light installed near the door.

(Problems to be Solved by the Invention) In photography lighting using lighting such as the above-mentioned gate lamp, there is a problem in that the light is irradiated from the side of the subject, creating strong shadows and making it impossible to obtain optimal images.

The present invention has been made in view of the above problems, and provides an illumination device for a door camera that can provide illumination from the front of a subject, compensate for insufficient illuminance to the subject, and easily obtain an optimal image.

[Structure of the invention]

(Means for Solving the Problems) The lighting device for a door camera of the present invention has a mounting structure that is installed through a hole formed in the inner and outer surfaces of a structure such as a door body. The light guide is characterized by comprising a shaped light guide and a light source disposed on the inner end surface of the light guide.

(Function) The door camera lighting device of the present invention provides a good image because the light from the light source disposed on the inner end surface of the light guide passes through the light guide and is irradiated from the front side of the subject. is obtained. And there is no need to form a hole for a lighting device in the door.
A lighting device can be easily installed together with a door camera.

(Example) The configuration of an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a structure, for example, a door body, and this door body 1 has mounting holes 2 formed therethrough through its inner and outer surfaces.

3 is a camera mechanism, which includes a lens group 4 and this lens group 4.
An image sensor 5 is disposed at the rear focal position.

Furthermore, 6 is a cylindrical light guide made of a translucent material such as acrylic resin or polycarbonate resin, and a screw hole 7 formed axially through the center of this light guide 6 is connected to the camera mechanism. A collar 8 that holds the lenses of the three lens groups 4 is screwed together, and a light guide body 6 is disposed around the camera mechanism 3.

The front edge of the light guide 6 is formed with an annular protrusion 9 that engages with the front opening edge of the hole 2 when the door 1 is attached. Further, a fixing nut 11 is screwed into a thread groove 1θ formed on the outer circumferential surface of the light guide body 6.

Reference numeral 12 denotes a plurality of light sources such as light emitting diodes and lamps arranged on the inner end surface of the light guide 6, which are arranged at approximately equal intervals.

The door body 1 is installed by fitting the light guide 6 equipped with the lens group 11 and the camera mechanism 3 such as the image pickup element 5 into the hole 2 from the outside, and installing the annular ridge 9 between the front side of the hole 2. A fixing nut 11 is screwed into the threaded groove 10 of the protrusion of the light guide 6 from the inner surface side of the door body 1, and the annular protrusion 9 and the fixing nut 11 secure the light guide. The light guide body 6 is fixed to the door body 1 by sandwiching the inner and outer surfaces of the door body 1 with the light guide body 6. A light source 12 is disposed on the inner end surface of the light guide 6.

Next, the operation of this embodiment will be explained.

The light from the light source 12 disposed on the inner end surface of the light guide 6 passes through the light guide 6 and illuminates the subject from the front side, so a good image can be obtained without creating shadows. It will be done. There is no need to separately form a hole for the illumination device in the door body 1 for the camera mechanism 3, and the illumination device can be easily installed together with the camera mechanism 3.

In the above embodiment, the camera mechanism 3 is directly connected to the light guide 6.
Although the structure incorporating the camera mechanism 3 has been described, the light guide body 6 is fitted around the light-impermeable outer shell of the camera mechanism 3.
It is also possible to have a structure in which the light guide body 6 is arranged around the .

Further, in the above embodiment, the light guide 6 is attached to the hole 2 of the door body 1, but a hole is formed in the wall near the door body 1, and the light guide is attached to the hole. may be attached.

〔Effect of the invention〕

According to the present invention, a cylindrical light guide is disposed around a camera mechanism fitted into a hole, and a cylindrical light guide is provided around a camera mechanism inserted into a hole, and the mounting is formed through the inner and outer surfaces of a structure such as a door body or a wall near the door body. Since the light source is placed on the inner end surface of the guide, illumination from the front of the subject can be easily obtained, making up for the lack of illumination for the subject and easily obtaining the optimal image. There is no need to form the door body on the door body, and it can be easily installed.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a lighting device for a door camera showing an embodiment of the present invention, and FIG. 2 is a rear view of the same. 1. Door body, 2. Mounting hole, 3. Camera mechanism, 6.
- Light guide, 12... light source. Invented on June 27, 1989 by Mitsuhiro Matsuda

Claims (1)

[Claims] (1) A cylindrical light guide disposed around a camera mechanism fitted into a mounting hole formed through the inner and outer surfaces of the structure, and a light source disposed on the inner end surface of this light guide. A lighting device for a door camera characterized by comprising: