JPH10177813A - Floodlight control sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose an inexpensive structure which has its photoreceptor nimbly rock and has a small number of part items. SOLUTION: A sensor base 20 in which a main detecting circuit component 23 is embedded is provided. A photoreceptor 1 forming a photoreceptive face 2 at its summit is provided rockingly against the sensor base 20. The center of the rock should be a point-contact part 5 formed between the sensor base 20 and the photoreceptor 1. Around the circumference of the photoreceptive face 2 for the photoreceptor 1 a spherical body 3 is formed along the above- mentioned oscillation. A spherical receptor 11 is provided on the sensor body 20 to contact the spherical body 3 except the photoreceptive face 2 in a sliding way. Between the sensor 20 and the photoreceptor 1 a spring 30 is placed. By the elasticity of the spring 30, a gap 41 is formed at the point-contact part 5 to contact the spherical body 3 with spherical receptor 11. Each shape should be specified in a way that when pushing the photoreceptor 1 to sensor base 20 side resisting the spring 30, the point-contact part 5 is contacted to form a gap 46 between the spherical body 3 and spherical receptor 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating light control sensor which is used for detecting a person by infrared rays and controlling blinking of an illuminating light.

[0002]

2. Description of the Related Art An illumination light control sensor includes a sensor base in which main detection circuit components are incorporated, and a photoreceptor mounted on the sensor base. Generally, the photoreceptor is often of a fixed type. However, the photoreceptor may be swingable so that the direction of the monitoring target can be changed by changing the direction of the light receiving surface of the photoreceptor. In the case of the oscillating type, a spherical portion is formed on the photoreceptor and a spherical receiving portion is formed on the sensor base, and a spherical motion (movement along the spherical surface) is allowed between them. Further, in order to make the ball motion smooth, a convex spherical portion having a small radius having the same center point as the central point of the spherical portion is provided on the back side of the spherical portion, and the convex spherical portion is used for sliding and This is a structure in which a coil spring constantly presses the convex spherical portion and the spherical receiving portion via a braking member.

[0003]

In the above prior art, the number of components is large, the cost is increased, and at the time of swinging of the photoreceptor, the photoreceptor is constantly pressed by a coil spring so that the photoreceptor is positively moved with a uniform load. The allowable range of component quality variation is narrow and quality control is difficult. SUMMARY OF THE INVENTION An object of the present invention is to propose an inexpensive structure with a small number of components, while reducing the swing of the photoreceptor.

[0004]

According to the present invention, there is provided a sensor base having a main detecting circuit component built therein. A photoreceptor is provided which is swingable with respect to the sensor base and has a light receiving surface formed in the center of the top. A point contact portion formed between the sensor base and the photoreceptor is defined as a center point of the swing. A spherical portion along the swing direction is formed near the periphery of the light receiving surface of the light receiving body. A spherical receiving portion which is slidably in contact with the spherical portion excluding the light receiving surface is formed on the sensor base. A spring is arranged between the sensor base and the photoreceptor.
A gap is formed in the point contact portion by the elasticity of the spring to make contact between the spherical portion and the spherical receiving portion. The shapes of the respective parts are determined so that the point contact portions are brought into contact with each other when the photoreceptor is pushed toward the sensor base against the spring to form a gap between the spherical portion and the spherical receiving portion.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The illumination light control sensor according to the present invention includes a sensor base 20 having a main detection circuit component 23 built therein. The photoreceptor 1 is swingable with respect to the sensor base 20 and has a light receiving surface 2 formed in the center of the top. The point contact portion 5 formed between the sensor base 20 and the photoreceptor 1 is used as the center point of the swing. A spherical portion 3 along the swing direction is formed near the periphery of the light receiving surface 2 of the light receiving body 1. The spherical base portion 11 slidably in contact with the spherical portion 3 excluding the light receiving surface 2 is formed on the sensor base 20. A spring 30 is arranged between the sensor base 20 and the photoreceptor 1. A gap 41 (see FIG. 1; the gap 41 is about 1 mm) is formed in the point contact portion 5 by the elasticity of the spring 30, and the spherical portion 3 and the spherical receiving portion 11 are brought into contact. When the photoreceptor 1 is pushed into the sensor base 20 against the spring 30, the point contact portion 5 is brought into contact with the light receiving body 1 to form a gap 42 between the spherical portion 3 and the spherical receiving portion 11 (see FIG. 2). Determine the shape of each part. The structure of the sensor base 20 will be supplemented. The sensor base 20 has an upper body 22, a middle body 25, and a lower body 10. The main detection circuit component 23 is arranged in the space between the upper body 22 and the middle body 25. Claw 1 for connection between middle body 25 and lower body 10
2. Use the screw 13. The photoreceptor 1 is arranged in the space between the middle body 25 and the lower body 10. Reference numeral 21 denotes a support shaft implanted in the body 25. The support shaft 21 is located in a space between the middle body 25 and the lower body 10 and participates in forming the point contact portion 5. The spring 30 is disposed around the support shaft 21. The structure of the photoreceptor 1 will be supplemented. A depression is formed at the center of the bottom plate 4 belonging to the light receiving body 1. The depressions take part in the formation of the point contacts 5. The main elements of the point contact part 5 are the support shaft 21 and the depression which receives the support shaft 21 appropriately. The gap 41 means a gap between the support shaft 21 and the hollow. Some circuit components 6 are arranged inside the photoreceptor 1 partitioned by the bottom plate 4. The light receiving surface 2 is a surface of the infrared sensor element. The location 7 in the vicinity of the light receiving surface 2 is formed in a mortar shape as a clue for the swing operation of the light receiving body 1 and to prevent ambient light or infrared light from sneaking into the light receiving surface 2. FIG.
Is a state where there is a gap 41 and there is no gap 42. Gap 4
2 and the spherical portion 3 and the spherical receiving portion 11 are in contact with each other, so that the photoreceptor 1 is stabilized with the light receiving surface 2 oriented in a required direction. FIG. 2 shows a state where there is no gap 41 and there is a gap 42. Since there is the gap 42, the spherical surface portion 3 and the spherical surface receiving portion 11 have no friction, and the light receiving body 1 swings smoothly. In this state, the point contact portion 5 by the support shaft 21 is established, and the ball moves smoothly. This is an operation of pushing the photoreceptor 1 against the spring 30 and turning the photoreceptor 1 in that state. Then, after turning the light receiving surface 2 in a desired direction, the hand is released from the light receiving body 1 to return to the stable state of FIG.

[0006]

According to the present invention, the gap on the point contact portion side and the gap between the spherical portion and the spherical receiving portion are appropriately formed or eliminated. According to this, the swing of the photoreceptor becomes light, and the number of parts is small and the structure is inexpensive.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an illumination light control sensor according to the present invention.

FIG. 2 is a similar sectional view showing the swing operation.

FIG. 3 is a bottom view of FIG. 1;

[Explanation of symbols]

 1: light receiving body 2: light receiving surface 3: spherical portion 5: point contact portion 11: spherical receiving portion 20: sensor base 23: main detecting circuit component 30: spring 41: gap 42: gap

Claims (1)

[Claims] 1. A light receiving device comprising a sensor base (20) having a main detection circuit component (23) built therein and swingable with respect to the sensor base (20) and having a light receiving surface (2) formed at the center of the top. A point contact portion (5) formed between the sensor base (20) and the light receiving body (1) as a center point of the swing, and the light receiving surface (2) of the light receiving body (1) is provided. Forming a spherical portion (3) in the vicinity of the periphery along the swing direction;
A spherical receiving portion (11) slidably in contact with the spherical portion (3) excluding the light receiving surface (2) on the sensor base (20);
And a spring (30) is arranged between the sensor base (20) and the photoreceptor (1), and a gap (41) is formed in the point contact portion (5) by the elasticity of the spring (30). The spherical part (3) and the spherical receiving part (1
1) The point contact portion (5) is brought into contact with the spherical portion when the photoreceptor (1) is pushed into the sensor body (20) side against the spring (30) while making contact between them and the spring (30). (3) An illumination lamp control sensor characterized in that the shapes of the respective parts are determined so as to form a gap (42) between the spherical receiving parts (11).