JP2680017B2 - Human body detection switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention has a heat ray sensor, and when an intruder is present within the detection area of the heat ray sensor, human body detection capable of obtaining a contact output of no voltage or a voltage. It is about switches.

[Prior Art] Generally, this type of human body detection switch is used, for example, to automatically turn on a light when a toilet is entered, or to automatically operate a ventilation fan.

[Problems to be Solved by the Invention] When installing and constructing such a human body detection switch, it is necessary to set the detection area to suit the purpose of use, and the detection area is the detection surface of the heat ray sensor. Since it is set by the lens plate arranged in the front, when trying to obtain a human body detection switch having a different detection area, there is a problem that the design change of the lens plate is required and the manufacturing cost becomes high.

An object of the present invention is to solve the above-mentioned problems, and by providing a lens cover for controlling the shape of the detection area separately from the lens plate, the lens cover can be easily detected in comparison with a design change of the lens plate. It is intended to provide a human body detection switch that allows the area to be set.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is mounted on the front side of a lens plate so as to cover the lens plate, and rotates simultaneously with the lens plate together with a rotating frame. A lens cover having a detection area correction function for correcting the formed detection area is provided.

This lens cover controls the detection area of the heat ray sensor by coloring or forming unevenness on at least one of the front and back surfaces.

[Operation] According to the above configuration, the detection area can be easily set only by changing the specifications of the lens cover, so that an increase in manufacturing cost due to the change of the detection area is reduced.

In particular, if the detection area is set by the coloring of the lens cover and the shape of the unevenness formed on the front and back surfaces,
Compared to a lens plate, the detection area can be set very easily.

[Embodiment] As shown in FIGS. 1 to 3, a case 1 is formed by combining a body 10 made of a synthetic resin molded product and a cover 20, and is a large-sized wiring device defined by the JIS standard. It has dimensions equivalent to three modules, and has a mounting portion formed so that it can be attached to a metal mounting frame or a synthetic resin mounting frame specified by the industry standard of the Wiring Equipment Manufacturers Association. These mounting frames are adapted to be mounted on an embedded box such as a switch box. The mounting portions are formed on both side surfaces of the cover 20, respectively.
A pair of locking holes 21 perforated on both left and right sides of 20
The projection is inserted by inserting a protruding piece of a metal mounting frame into the mounting frame.
4 are inserted into holding holes formed in the synthetic resin mounting frame. One hook 23 projects from each of the left and right edges and the rear edge of the lower surface of the cover 20, and the hook 23 fits into a fitting hole 11 formed in the peripheral wall of the body 10 from the inside of the peripheral wall of the body 10. Then, the body 10 and the cover 20 are joined.

The inside of the body 10 is separated by a partition rib 12 into a circuit portion storage chamber 13 and a pair of terminal storage chambers 14, and a pair of holding ribs 15 project on the inner peripheral surfaces of the left and right side walls of the circuit portion storage chamber 13. The left and right ends of the rotary frame support plate 16 are held in the grooves between the holding ribs 15. The rotating frame support plate 16 is formed in a substantially T-shape in which the left and right middle portions protrude upward, and a step 16b is formed on a side edge of the vertical piece. A turning frame support rib 17 is formed on the inner peripheral portion of the rear wall of the body 10 so as to face the turning frame support plate 16. The upper surfaces of the rotation frame support plate 16 and the rotation frame support rib 17 are arc-shaped rotation surfaces 16a and 17a, each of which has a concave central portion.
The rotation frame 30 is rotatably supported between the upper surfaces of the rotation frame support plate 16 and the rotation frame support rib 17. Body 10
Inside, a first printed circuit board 40 on which a power supply circuit unit is mounted is mounted. The printed circuit board 40 has cutouts 41a and 41b that expose the rotation surface 16a of the rotation frame support plate 16 and the rotation surface 17a of the rotation frame support rib 17, respectively. The printed board 40 is placed on the partition ribs 12, the step 16b of the rotating frame support plate 16, and the like, and a space is formed between the inner bottom surface of the body 10 and the printed board 40, The circuit components mounted on the printed board 40 are housed in this space. In particular, the main circuit components on the printed circuit board 40 will be placed in the portion corresponding to the circuit section storage chamber 13. A boss 18 protrudes from the inner bottom surface of the body 10 in the circuit portion storage chamber 13, and a second printed circuit board 42 is held by a fixing screw 19 screwed to the boss 18. A fixing notch 43 into which the fixing screw 19 is inserted is formed on the periphery of the printed circuit board 42, and a variable resistor VR having a slidable handle 72 is mounted on the printed circuit board 42. A cutout portion 41c from which the handle 72 of the variable resistor VR protrudes is formed on the periphery of the first printed circuit board 40.

Terminals 50 are housed in the terminal storage chamber 14. The terminal 50 includes a terminal plate 51 and a locking spring 52 having a spring force directed toward the terminal plate 51.
And a release button 53 capable of pressing the locking spring 52 against the spring force, and has a structure known as a quick connection terminal. One terminal storage chamber 14 has a pair of terminal plates 51 and a pair of locking springs 52.
And the release button 53 is arranged so as to be shared by both the locking springs 52. Each locking spring 52 on the bottom wall of the body 10
An electric wire insertion hole (not shown) is formed corresponding to
Further, a part of the release button 53 is exposed so that the release button 53 can be pressed against the spring force of the locking spring 52 by a jig such as a driver. Here, the terminal 50 is configured such that a single copper wire having a diameter of 1.6 or 2.0 for general residential wiring can be connected thereto. A connection piece 54 is provided at one place of the terminal board 51 so as to project upward, and the connection piece 54 is soldered and fixed to the printed board 40 so that the terminal 50 and the circuit portion on the printed board 40 are electrically connected. Connected.

The rotating frame 30 is formed in a disk shape and is formed in a frame shape in which a pair of rotating plates 31a and 31b facing each other apart from each other are connected by a pair of parallel side frames 32, and a pyroelectric sensor as a heat ray sensor. A third printed circuit board 44 on which the element P and its peripheral circuit section are mounted is mounted. The rotating plates 31a and 31b are the above-mentioned rotating surfaces 17
The rotary frame 30 can be rotated with respect to the body 10 by being mounted on the a and 16a. A fixing notch 45 is formed on one side of the printed circuit board 44, and a fixing protruding piece 46 protrudes from one side opposite to this one side. Rotating frame
One of the rotating plates 31a has a notch 3 for fixing along the inner surface.
A boss 33 corresponding to 1a is formed, and a support hole 34 in which the fixing projection 46 is fitted is formed on the other rotating plate 31b. Therefore, the fixing projection 46 is fitted into the support hole 34,
Fixing screw consisting of tapping screw through fixing notch 45
By screwing the 35 to the boss 33, the printed circuit board 44 is fixed to the rotating frame 30. One rotating plate 31
A handle 36 that is operated when adjusting the angle of the rotating frame 30 with respect to the body 10 is provided on the peripheral surface of a. Further, the stoppers 37a, 37 for restricting the rotation range of the rotation frame 30 by contacting the inner peripheral surface of the cover 20 on the outer surfaces of both the rotary plates 31a, 31b.
Each b is projected.

The above-described printed circuit boards 40, 42, and 44 are connected to each other via jumper wires 47. A jumper wire 47 connecting the first printed circuit board 40 and the second printed circuit board 42 in the body 10 and the third printed circuit board 44 in the rotating frame 30 is connected to the notch 41a formed in the printed circuit board 40. It is supposed to be inserted. Further, the jumper wire 47 connecting the printed board 44 in the rotating frame 30 and the other printed boards 40 and 42 is connected to the rotating frame 30 so as not to be disconnected when the rotating frame 30 is rotated.
Is set to have a margin greater than the rotatable length of. An insulating sheet 48 is provided on the upper surface of the printed board 40 so as not to short-circuit with the circuit section of the printed board 44.

By the way, the pyroelectric element P mounted on the printed circuit board 44
Are arranged between the two side frames 32 such that the upper surface side in FIG. 1 becomes a detection surface, and in front of the detection surface of the pyroelectric element P,
A lens plate 60 for setting a detection area is provided.
The lens plate 60 is a flat Fresnel lens made of a material such as high-density polyethylene that transmits far infrared rays.
It is formed in a rectangular shape, and a pair of engaging hooks 61 is provided on both side edges to protrude. The lens plate 60 includes a rotary plate 31a of the rotary frame 30,
The peripheral portion of the lens plate 60 is placed on the support rib 39 formed in a shape along the peripheral edge of the 31b, and in the engaging recess 38 formed in the lower inner peripheral surface of the both side frames 32 of the rotating frame 30. By engaging the engaging hook 61, the rotating frame is curved in a semi-cylindrical shape.
It is supposed to be held at 30. The lens plate 60 is composed of a plurality of regions so as to form a desired detection area. It goes without saying that the focal point for each area is set on the detection surface of the pyroelectric element P.

An example of the detection area D set by the lens plate 60 is shown in FIG. 4A shows a detection area D in a plane substantially orthogonal to the rotation axis of the rotation frame 30, and FIG. 4B shows the rotation frame 30.
Detection area D in a plane including the rotation axis of P and the pyroelectric element P
Is shown.

On the upper surface of the cover 20, a pair of rotating frame holding plates 24a, 24b that respectively hold the rotating plates 31a, 31b of the rotating frame 30 are protruded. Each of the rotating frame holding plates 24a and 24b has a peripheral wall, and the rotating plates 31a and 31b rotate along the inner peripheral surface of the peripheral wall. That is, the rotating plates 31a, 31b are sandwiched between the inner peripheral surfaces of the peripheral walls of the rotating frame holding plates 24a, 24b and the rotating surfaces 16a, 17a of the rotating frame support plate 16 and the rotating frame holding ribs 17. That is, it turns in the form of a circle. As described above, the rotation range of the rotation frame 30 is the stopper 37a,
37b is regulated by contacting the inner peripheral surface of the cover 20, and the range is set to approximately 40 ° on the left and right. That is, since the detection area when the rotation frame 30 is fixed is approximately 90 °, the detection area can be adjusted within a range of 170 ° by rotating the rotation frame 30. A handle 71 for operating a switch SW, which will be described later, is provided on a portion of the front surface of the cover 20 which is different from the rotating frame holding plates 24a and 24b.
Are formed, a light receiving hole 26 exposing the light receiving element PD, and a display hole 27 exposing the light emitting diode LD. A nameplate 28 is provided at a portion straddling the handle insertion hole 25, the light receiving hole 26, and the display hole 27. Here, the nameplate 28 has a through hole 28a at a portion corresponding to the handle insertion hole 25, and has light transmitting portions 28b and 28c at portions corresponding to the light receiving hole 26 and the display hole 27, respectively. Cover 2
A handle exposure hole 29 through which a handle 72 of the variable resistor VR is exposed is formed at the center of one side surface of the variable resistor VR. This part is the part covered by the flash plate when the case 1 is mounted on the mounting frame and the JIS standard flash plate is arranged on the front side of the case 1. To prevent them from touching.

A lens cover 64 made of a synthetic resin molded product that is transparent to far-infrared rays is mounted between the rotating frame holding plates 24a and 24b on the cover 20. The lens cover 64 is formed in a semi-cylindrical shape, and a pair of locking pieces 65 project from both side edges thereof. This locking piece 65, as shown in FIG.
The lens cover 64 is fixed to the cover 20 by being locked to the inner peripheral surface of the lens. The lens cover 64 is attached to the lens plate 60
Is arranged so as to be in close contact with the outer surface of the. Lens cover
Since the infrared ray 64 only needs to transmit infrared rays, it can be formed of a material that is opaque to visible light rays. By covering the turning frame 30 with this lens cover 64, the turning frame 30 It is possible to prevent the user from feeling psychologically anxious, because the internal circuit portion is not visible from the outside. By the way, the lens cover 64 is a lens plate.
Since it is arranged so as to cover 60, the detection area D can be adjusted by adjusting the transmittance for far infrared rays. As described above, in order to adjust the transmittance of the lens cover 64, the amount and type of pigment for coloring the lens cover 64 may be adjusted, or as shown in FIG. 5, at least one surface of the lens cover 64 may be textured. The irregularities 66a and 66b may be formed by processing or the like. When the lens cover 64 is colored, it is common to make the entire lens cover 64 the same color, which is effective when it is desired to reduce the sensitivity as a whole. Also, since sensitivity can be adjusted by changing the type of pigment, in addition to the so-called milky white that is commonly used in wiring equipment, coloring such as chocolate color and Rikyu can give color variations, The sensitivity can also be identified by the type of color. On the other hand, the lens cover 64 has irregularities 66a, 66
When forming b, the diffusion rate of the heat ray can be adjusted depending on the location by adjusting the size of the irregularities 66a, 66b according to the location, so that the shape of the detection area D can be changed. is there. Here, since the irregularities 66a and 66b formed on the lens cover 64 are simply adjusted in size, the adjustment of the detection area D is made as compared with the case where the detection area D is adjusted by changing the design of the lens plate 60. Becomes very easy. In this way, the sensitivity can be adjusted by coloring the lens cover 64, and the shape of the detection area D can be adjusted by the unevenness 66a, 66b. Therefore, if the color and unevenness 66a, 66b are used together, the desired detection area D can be easily obtained. It can be formed. That is, the lens cover 64 has a detection area correction function for correcting the detection area D formed by the lens plate 60.

The circuit section is configured as shown in FIG. The above-mentioned four terminals 50 constitute an input terminal of the commercial power supply and an output terminal in which the contact r of the relay Ry is inserted between the commercial power supply and the commercial power supply. The commercial power supply is rectified and smoothed by the power supply circuit 81 and stabilized by the constant voltage circuit 82. The DC power thus obtained is supplied to the processing circuit IC to which the pyroelectric element P is connected. The processing circuit IC is configured by externally attaching peripheral components to an integrated circuit that is commercially available under the name of CF1651C, for example. When the infrared ray radiated from the human body is detected by the pyroelectric element P, the output terminal OUT is connected. The output level is set to “H” for a certain time. This time, variable resistor VR
It can be changed by adjusting. This adjustment range is set, for example, from about 10 seconds to about 6 minutes. Further, a light receiving element PD made of CdS is connected to the enable terminal ENA, and the operation of the processing circuit IC is set to stop when the amount of light received by the light receiving element PD increases. The output terminal OUT of the processing circuit IC is connected to the relay control circuit 83 via the switch SW. The relay control circuit 83 includes a switch element Q composed of a transistor.
Element LD consisting of a coil, a relay coil L and a light emitting diode
Is connected to the power supply circuit 81, and while the control terminal of the switch element Q is at "H", the contact r of the relay Ry is closed and the display element LD is turned on.
The switch SW is a three-contact slide switch that switches between a state in which the control terminal of the relay control circuit 83 is set to “H” and “L” and a state in which the control terminal is connected to the output terminal OUT of the processing circuit IC. Three states can be selected. Therefore, if the control terminal of the relay control circuit 83 is manually set to either “H” or “L” by operating the switch SW, the contact r is turned on or off accordingly. . Further, if the state where the control terminal of the relay control circuit 83 is connected to the output terminal OUT of the processing circuit IC is selected, when the pyroelectric element P detects a human body, the contact r is turned on for a certain period of time.

Here, power supply circuit 81, constant voltage circuit 82, relay control circuit
83, switch SW, light receiving element PD are the first printed circuit board
The variable resistor VR and the capacitor C are mounted on the second printed circuit board 42, and the processing circuit IC is mounted on the third
Mounted on the printed circuit board 44 of

[Effects of the Invention] As described above, the present invention is mounted on the front side of a lens plate so as to cover the lens plate, and simultaneously rotates together with the lens plate together with the rotation frame to correct the detection area formed by the lens plate. Since a lens cover with a detection area correction function is installed, simply changing the specifications of the lens cover
The detection area can be easily set, and the increase in manufacturing cost due to the change of the detection area is reduced. In particular, when the transmittance of the lens cover is controlled by coloring, the overall sensitivity can be adjusted easily, and by forming unevenness on at least one of the front and back surfaces, the detection area of the heat ray sensor can be improved. Since the shape of the detection area can be easily changed by controlling it, it is extremely easy to compare the shape and size of the detection area by changing the design of the lens plate. It has the advantage that it can be set.

[Brief description of the drawings]

1 (a) and 1 (b) are exploded perspective views showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of the same, FIG. 3 is a horizontal sectional view of the same, and FIG. 4 is a detection area of the same. FIG. 5 is a schematic view showing an example of a lens cover used in the same as above, and FIG. 6 is a circuit diagram of a circuit section used in the above. 1 ... Case, 60 ... Lens plate, 64 ... Lens cover,
66a, 66b ... unevenness, D ... detection area, P ... pyroelectric element.

Claims (3)

(57) [Claims] 1. A human body detection switch which has a heat ray sensor inside a case and outputs a contact when a person intruding into a detection area of the heat ray sensor formed in front of the case is detected. A lens plate mounted on a rotating frame that is rotatable with respect to the front surface of the case is arranged in front of the surface, and it is mounted on the front side of the lens plate so as to cover the lens plate and rotates simultaneously with the lens plate. A human body detection switch characterized in that a lens cover having a detection area correction function for rotating integrally with a frame and correcting a detection area formed by a lens plate is provided. 2. The human body detection switch according to claim 1, wherein the lens cover is colored so that the detection area of the heat ray sensor has a desired shape. 3. The human body detection switch according to claim 1, wherein the lens cover is formed with concavities and convexities on at least one of the front and back surfaces so that the detection area of the heat ray sensor has a desired shape.