JPH0955149A - Heat ray sensing automatic switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat ray sensing automatic switch attachable to a luminaire beautifully in appearance. SOLUTION: A movable body 4 which stores a heat ray sensor composed of a pyroelectric element for detecting the heat ray from the human body, etc., and a printed board 14 which has a switch element for automatically switching on/off a luminaire based on the output of the heat ray sensor and a control circuit for controlling the switch element are provided in a case formed by connecting a cover 2 whose bottom face is open, to the upper side of a body 1. A fitting hole 2d, into which a fitting screw for threadly engaged with the luminaire main body is inserted, penetrates through a projection part 2c integrally provided with the cover 2 so that the luminaire main body and the cover 2 is connected by the fitting screw threadly engaged with the luminaire main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat ray sensing type automatic switch for automatically turning on / off a load by detecting a heat ray radiated from a human body or the like.

[0002]

2. Description of the Related Art Conventionally, as a heat ray sensing type automatic switch, there is a ceiling mount type heat ray sensing type automatic switch attached to a ceiling for the purpose of blinking a light in response to a person entering or leaving a room. In this kind of heat ray detection type automatic switch, in order to adjust the detection area of the heat ray sensor, the heat ray sensor is housed in a movable body which is rotatably held with respect to a case fixed to the ceiling. The orientation of the detection surface of the sensor is adjusted.

[0003]

By the way, the conventional ceiling-mounted heat ray sensing type automatic switch has a problem that the external appearance of the ceiling surface is not good because it is installed separately from the lighting equipment. The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat ray sensing type automatic switch that can be attached to a lighting fixture with good appearance.

[0004]

In order to achieve the above object, the invention of claim 1 responds to the presence or absence of a human body based on the output of the heat ray sensor for detecting the heat ray radiated from the human body. A switch element that is turned on and off, a case provided with the heat ray sensor and the switch element, and an electric wire that connects an external circuit, and a mounting screw that is screwed to a lighting fixture at a key portion of the case. Since it is characterized in that the mounting hole through which is inserted is provided, it can be integrated with a lighting fixture, and the appearance of the ceiling surface can be improved.

According to the second aspect of the invention, the inner surface of the case is
Since the tension removing rib for holding a part of the electric wire in a curved shape is provided, cutting of the electric wire can be prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. In the heat ray sensing type automatic switch according to the present embodiment, as shown in FIG. 1, a human body is housed in a case A (see FIG. 2) formed by combining a cover 2 having an opening on the lower surface on the upper surface side of the body 1. A movable body 4 containing a heat ray sensor (not shown) made up of a pyroelectric element for detecting heat rays from the like, and a lighting fixture 32 (see FIG. 7) described later are automatically turned on based on the output of the heat ray sensor. A switch element (not shown) for turning off and a printed circuit board 14 on which a control circuit for controlling the switch element is mounted are provided.

The cover 2 is provided with a locking piece 2a projecting from the bottom surface of a recess 2b provided on the side surface of the cover 2 and formed on a projecting piece 18 integrally provided on the body 1 made of resin. By fitting (snap-in) into the pawl receiving hole 19, the body 1 is joined (see FIG. 2). A circular exposed window 1 in the center of the body 1.
6 is formed, and a movable body 4 formed in a spherical shape is attached to the exposure window 16 so that the angle can be adjusted with respect to the body 1. A circuit board (not shown) on which the heat ray sensor or the like is mounted is installed in the movable body 4, and the electric wire 21 connected to the circuit board is drawn out from the electric wire wire outlet 3c of the movable body 4 to be printed on the printed board 14. Is connected to the control circuit. In addition, the bottom of the body 1 is substantially circular,
As shown in FIG. 3, a lighting holding time changeover switch 56 for switching the lighting holding time of the lighting equipment and an operating illuminance adjustment switch 5 for adjusting the illuminance at which the heat ray sensor operates.
7 are provided. Here, the lighting holding time changeover switch 56 is a switch for changing the time for holding the lighting state of the lighting fixture from the time when the heat ray is detected by the heat ray sensor. Also, the operating illuminance adjustment switch 57
Is a switch for setting a threshold of illuminance for operating the detection function of the heat ray sensor.

That is, if the threshold value is set to be small, the luminaire 32 (see FIG. 7) does not light up even when a person enters in bright weather such as daytime. On the other hand, when a person enters in the dark such as at night, the lighting fixture 32 keeps the lighting state for a predetermined holding time set by the lighting holding time changeover switch 56, and thereafter, the lighting fixture 32 is automatically turned off. There is no need to worry about forgetting.

As shown in FIG. 1, the lower half of the movable body 4 is provided with a light receiving lens 15 which is a Fresnel lens as a transmitting portion for collecting the heat rays to the heat ray sensor.
That is, the movable body 4 is configured by coupling the hemispherical movable body 3 and the hemispherical light receiving lens 15 coupled to the lower surface of the movable body 3. The light-receiving lens 15 is an assembly of a large number of lens regions, and is configured to be able to detect a minute movement of the heat source as a change in heat rays by changing the amount of light collected by the heat ray sensor depending on the direction. Further, a pair of shaft pins 3a is provided on the outer peripheral surface of the movable body 4 so as to be spaced apart from each other in a substantially diametrical direction.

By the way, a pair of guide ribs 17 having a substantially U-shaped horizontal cross section are formed on the peripheral edge of the exposed window 16 in the body 1 so that the shaft pins 3a projecting from the movable body 4 are engaged with the guide ribs 17. That is, when the shaft pin 3 a is engaged with the guide rib 17, the movement of the movable body 4 is restricted by the shaft pin 3 a in the plane including the guide ribs 17. That is, the movable body 4 can rotate within the plane including the guide ribs 17 and rotate about the shaft pin 3a.

In addition, the movable body 4 has a support 7 which is joined to a pressing body 5 made of a pressing metal fitting so that the lower outer peripheral surface of the movable body 3 is brought into contact with the opening peripheral edge of the exposure window 16 provided in the body 1.
The upper portion 3b of the movable body 3 is brought into contact with the holding body 5, and the pressing body 5 is coupled to the body 1 by the fixing screw 11 made of a tapping screw. Therefore, the movable body 4 is sandwiched between the opening 7 of the exposure window 16 and the support 7.

By the way, as shown in FIG. 4, the supporting member 7 has a taper which extends upward at a position substantially diametrically separated from the supporting member main body 6, extends outward at the upper end side, and is inclined downward at the tip thereof. It has a protrusion-like locking portion 6a provided with a surface 6b and a protrusion 6c extending upward from substantially the center of the support body 6. Therefore, by inserting the upper end of the projecting locking portion 6a into the locking hole 5a of the pressing body 5, the support body 7 is attached to the pressing body 5 with one touch. The upper portion 3b of the movable body 3 is held by an O-ring 9 inserted in the bottom surface of the support 7. Here, since the coil spring 8 that expands and contracts in the vertical direction is built in the support body 7, when the pressing body 5 is coupled to the body by the fixing screw 11, the O-ring 9 is moved by the elastic force of the coil spring 8. It is adapted to elastically contact the upper portion 3a of the main body 3.

As shown in FIG. 1, the printed board 14 is connected to the body 1 by an assembly screw 10 which is a tapping screw that is screwed into the body 1. Further, the printed board 14 has an electric wire insertion port 14a for drawing out the electric wire 22 for connecting an external circuit to the control circuit to the cover 2 side.
The electric wire 22 pulled out from the electric wire insertion port 14a has a cover 2
Through the wire insertion port 2e through the inside of the
2 is connected to the lighting fixture 32 (see FIG. 7) via the connector 23.

Here, on the inner surface of the cover 2, as shown in FIG. 5, in order to remove the tension applied to the electric wire 22, a tension removing rib 2f for holding the electric wire 22 in a curved shape,
2g, 2h, 2i, 2j, 2k are formed. For this reason, in the present heat ray detection type automatic switch, the electric wire 22 is held in a curved shape on the inner surface of the cover 2, so that even if the electric wire 22 is pulled when it is attached to the lighting fixture 32, the electric wire 2 is not pulled.
The tension applied to the wire 2 is dispersed, and the wire 22 can be prevented from being broken.

Further, as shown in FIG. 1, the cover 2 has a projection 2c integrally formed on the side surface of the cover 2, into which a mounting screw (not shown) to be screwed into the lighting fixture main body 33 is inserted. Since the mounting hole 2d is provided therethrough, the lighting device main body 33
With the mounting screws provided on the lighting fixture main body 33,
The cover 2 can be joined. The mounting hole 2d
Is provided at a position deviated from the center between adjacent locking claws 2a, as shown in FIG.

FIG. 7 shows a usage state when the heat ray sensing type automatic switch of the present embodiment is attached to the lighting fixture 32.
In this heat ray sensing type automatic switch, since the cover 2 is coupled to the luminaire main body 33, the cover 2 and the body 1 can be covered with the shade 31 of the luminaire, and the light receiving lens 1
Since only 5 and a part of the movable body 4 are exposed to the outside of the shade 31, the appearance of the ceiling surface becomes better than the conventional one.

The above-mentioned mounting procedure will be briefly described below. First, connect the connector 23 to the lighting fixture body 33,
The cover 2 is attached to the luminaire main body 33 with the mounting screws. Then, the body 1 to which the printed board 14 is joined is joined to the cover 2. Then, the shade 31 is attached. Therefore, the heat-sensitive automatic switch can be easily attached to the lighting fixture. At this time, the head of the mounting screw is hidden by the body 1.

[0018]

According to the first aspect of the present invention, since the mounting hole through which the mounting screw screwed into the lighting fixture is inserted is provided at a key portion of the case, the mounting hole can be integrated with the lighting fixture, and the ceiling can be integrated. This has the effect of improving the appearance of the surface. According to the second aspect of the present invention, the inner surface of the case is provided with the tension removing rib for holding a part of the electric wire in a curved shape, so that the electric wire can be prevented from being cut.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an overall configuration of an embodiment.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a bottom view of the embodiment.

FIG. 4 is a partially cutaway side view showing the structure of the main part of the above.

FIG. 5 is a plan view showing a state in which a body and a cover are unfolded in the embodiment.

FIG. 6 is a top view of the embodiment.

FIG. 7 is a schematic sectional view showing a usage example of the present invention.

[Explanation of symbols]

 1 Body 2 Cover 2f ~ 2k Rib for tension removal 2c Projection 2d Mounting hole 4 Movable body 14 Printed board 22 Wire A Case

Claims (2)

[Claims] 1. A heat ray sensor for detecting a heat ray radiated from a human body, a switch element which is turned on / off so as to correspond to the presence or absence of a human body based on an output of the heat ray sensor, the heat ray sensor and the switch element. And a wire for connecting an external circuit, wherein the case is provided with a mounting hole through which a mounting screw to be screwed into the lighting device is inserted. Automatic switch. 2. The heat ray sensing automatic switch according to claim 1, wherein a tension removing rib for holding a part of the electric wire in a curved shape is provided on an inner surface of the case.