JP2647406B2 - Human body detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a human body detector capable of obtaining an external output when detecting an intruder in a detection area of a heat ray sensor.

2. Description of the Related Art Generally, a human body detector of this type is used for automatically turning on a light when a person enters a toilet or automatically operating a ventilation fan, for example. Therefore, it is necessary to appropriately set the detection area according to the usage environment. As a conventional device which achieves this object, there has been a device in which a reflecting mirror provided for introducing a heat ray into a heat ray sensor can be rotated to change a detection direction (for example, see Japanese Utility Model Application Laid-Open No. No. 76227).

[Problem to be Solved by the Invention] In the above configuration, the space required for rotating the reflecting mirror becomes large, and other parts and the like cannot be arranged in this portion. Was.

In addition, when surrounding light is large, it is not necessary to turn on the lighting or the like. Therefore, it is desirable to stop the operation. However, in the above-described conventional configuration, this point is not taken into consideration, and the lighting is turned on despite the bright surroundings. There was a problem of doing it.

The present invention has been made to solve the above-described problems, and aims to provide a small and highly functional human body detector by increasing the mounting efficiency in a case. It is intended to operate only when the amount of light in the surroundings is small, so that the illumination is not turned on when unnecessary.

Furthermore, to prevent the heat ray sensor handling small current from malfunctioning due to the influence of noise, to prevent the lens plate that determines the detection area from being stained, to prevent the detection area from changing, and to specify the detection area Another object of the present invention is to make it possible to provide a different product by replacing only the lens plate, and to prevent disconnection from occurring in the connection portion when changing the detection area of the heat ray sensor.

Means for Solving the Problems According to the invention of claim 1, in order to achieve the object of providing a compact and high-performance human body detector with high mounting efficiency in a case, a front opening body is provided. A case formed by combining a cover on the front side, and a large-sized 3
A case in which at least one pair of locking claws, which have dimensions corresponding to the individual module and can be coupled to a mounting frame for wiring equipment fixed to the construction surface, are integrally provided on both side edges of the cover, Rotating frame attached to the case so as to be rotatable, a first printed circuit board held by the rotating frame so as to rotate integrally with the rotating frame, and mounted on the first printed circuit board A hot-wire sensor that detects an intruder into a detection area formed in front of the case and generates an external output;
A second printed circuit board housed in a case connected to the first printed circuit board via an electric wire, and a detection area determined by being mounted on a rotating frame so as to be disposed in front of a detection surface of the heat ray sensor. And a lens plate having the following configuration.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a photoelectric device for inhibiting generation of an external output when the amount of ambient light is equal to or more than a predetermined amount.

According to a third aspect of the present invention, in the first aspect of the present invention, an earth pattern is formed over substantially the entire surface of the first printed circuit board except for a portion where a conductive pattern necessary for connection of the heat ray sensor is formed. .

According to a fourth aspect of the present invention, in the first aspect of the present invention, a lens cover is attached to the case so as to cover the lens plate.

According to a fifth aspect of the present invention, in the first aspect of the invention, the lens plate is formed of a flexible material, and the engaging portions formed on both side edges detachably engage with the engaging portions of the rotating frame. Things.

According to a sixth aspect of the present invention, in the first aspect of the invention, the length of the electric wire is set to a length having a margin more than the rotation frame can rotate.

[Operation] According to the configuration of the first aspect of the present invention, a rotating frame rotatable with respect to the front surface of the case is provided, and the rotating frame is held by the rotating frame so as to rotate integrally with the rotating frame. Since the heat ray sensor is mounted on one printed circuit board, the detection area of the heat ray sensor can be changed by rotating the rotating frame with the case fixed to the construction surface. Moreover, since the lens plate for determining the detection area is mounted on the rotating frame, the positional relationship between the heat sensor and the lens plate is kept constant when the rotating frame is rotated with respect to the front surface of the case. Can keep in a relationship,
Even if the detection area is changed by the rotation of the rotation frame, the detection accuracy can be maintained. Further, since the first printed circuit board on which the heat ray sensor is mounted and held by the rotating frame is provided separately from the second printed circuit board accommodated in the case,
The first printed circuit board that rotates together with the rotating frame can be formed in a small size. As a result, the rotating frame is reduced in size and weight, and the rotating operation on the case becomes easy.

In addition, the case is formed by connecting the body and the cover, and the locking claw having a size corresponding to three large square modules of the wiring device and capable of being connected to the mounting frame for the wiring device fixed to the construction surface. At least one pair is provided on each side edge of the cover, so that it can be used as a mounting frame for wiring equipment when fixing to a construction surface such as a wall surface. There is no need to manufacture, and an increase in design or manufacturing costs can be suppressed. In addition, by applying the wiring method to the wiring method, it is not necessary for the contractor to acquire new construction techniques, and it is possible to suppress an increase in the cost of preparing manuals for the construction method and increasing the education cost of the construction method. You can do it. In addition, since the locking claws are integrally protruded from the cover, the number of components can be reduced as compared with the case where the locking claws are provided on another component.

According to the configuration of the second aspect of the present invention, the external output is stopped when the ambient light amount is equal to or more than the predetermined value. Therefore, if the external output is used for turning on / off the lighting equipment, the surroundings are bright and illumination is unnecessary. In such a case, the lighting can be prevented from being turned on.

According to the configuration of the third aspect of the present invention, by forming a large ground pattern on the first printed circuit board on which the heat ray sensor is mounted, it is possible to prevent the output of the heat ray sensor which is a minute current from being affected by noise. Can be.

According to the configuration of the invention of claim 4, since the lens plate is covered with the lens cover, dirt hardly adheres to the lens plate,
This prevents a change in the detection area.

According to the configuration of the fifth aspect of the invention, since the lens plate can be attached and detached, the detection area can be easily changed by changing the specifications of the lens plate.

According to the configuration of the sixth aspect of the present invention, since the length of the electric wire connecting the first printed board and the second printed board has a margin, the wire is not disconnected when the rotating frame is rotated. Can be used.

[Example] As shown in Figs. 1 to 6, the case 1 is formed by combining a body 10 made of a synthetic resin molded product and a cover 20, and has 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.
Locking pawls 22 projecting from each side edge of each pair of two pairs
Is inserted into a holding hole formed in the synthetic resin mounting frame. One hook 23 projects from each of the left and right side edges and the rear side edge of the lower surface of the cover 20, and the hooks 23 are fitted into fitting holes 11 formed in the peripheral wall of the body 10.
The body 10 and the cover 20 are fitted together from the inside of the peripheral wall.

The inside of the body 10 is separated by a partitioning rib 12 into a circuit section storage chamber 13 and a pair of terminal storage chambers 14.
A pair of holding ribs 15 protrude from the inner peripheral surfaces of the left and right side walls of 13, and the left and right ends of the rotating frame support plate 16 are held in 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. Rotating frame support plate 16 and rotating frame support rib
The upper surface of 17 has an arc-shaped rotating surface 16a,
17a, the rotating frame support plate 16 and the rotating frame supporting rib 1
The rotating frame 30 is rotatably supported between the upper surface of the rotating frame 7 and the upper surface. A printed circuit board 40 as a second printed circuit board on which a power supply circuit unit is mounted is mounted in the body 10. Printed circuit board 40
The rotation surface 16a of the rotation frame support plate 16 and the rotation frame support rib 17
Notches 41a and 41b exposing the rotating surface 17a are formed, respectively. This printed circuit board 40 includes partition ribs 12,
The body 10 is placed on the step 16b of the rotating frame support plate 16 and the like.
A space is formed between the inner bottom surface and the printed circuit board 40, and the circuit components mounted on the printed circuit board 40 are accommodated 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 printed board 42 is held by a fixing screw 19 screwed to the boss 18. A fixing screw 19 is provided on the periphery of the printed circuit board 42.
The fixing notch 43 into which the
Above is a variable resistor with a slidable handle 72
VR is implemented. A cut-out portion 41c from which the handle 72 of the variable resistor VR projects is formed on the periphery of the printed circuit board 40.

Each of the terminal storage chambers 14 is provided with a pair of terminals 50a to 50d. Each of the terminals 50a to 50d has a terminal plate 51, a locking spring 52 having a spring force toward the terminal plate 51, and a release button 53 capable of pressing the locking spring 52 against the spring force. It has a well-known structure as a terminal. A pair of terminal plates 51 and a pair of locking springs 52 are housed in one terminal storage chamber 14, and the release button 53 is disposed so as to be shared by both locking springs 52.
The bottom wall of the body 10 has an electric wire insertion hole corresponding to each locking spring 52.
55 is provided, and a part of the release button 53 is exposed so that the release button 53 can be pressed by a jig such as a screwdriver against the spring force of the locking spring 52. Where the terminal
50a ~ 50d is 1.6mm or 2.0mm diameter for general house wiring
Is configured so that a single copper wire can be connected. At one place of the terminal plate 51, a connecting piece 54 is provided to protrude upward, and this connecting piece 54 is fixed to the printed circuit board 40 by soldering.
The circuits 50a to 50d and the circuit section on the printed circuit board 40 are electrically connected.

As shown in FIG. 7, the rotating frame 30 is formed in a frame shape in which a pair of rotating plates 31a and 31b formed in a disk shape and separated from each other and opposed to each other are connected by a pair of parallel side frames 32. In addition, a printed circuit board 44 as a first printed circuit board on which a pyroelectric element P as a heat ray sensor is mounted is mounted. On the printed circuit board 44, a part of the peripheral circuit in addition to the pyroelectric element P is mounted. The rotating frame 30 is configured such that the rotating plates 31a and 31b
By being placed on the a and 16a, the rotating frame 30 can rotate with respect to the body 10. 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. A boss 33 corresponding to the fixing notch 31a is formed on one rotating plate 31a of the rotating frame 30 along the inner surface, and a fixing protruding piece 46 is fitted to the other rotating plate 31b. A support hole 34 is formed. Therefore, the fixing protrusion 46 is fitted into the support hole 34, and the fixing screw 35 formed of a tapping screw is
By screwing the printed circuit board 33, the printed circuit board 44 is fixed to the rotating frame 30. A handle 36 that is operated to adjust the angle of the rotating frame 30 with respect to the body 10 is provided on the peripheral surface of the rotating plate 31a so as to protrude therefrom. In addition, stoppers 37a and 37b that protrude from the outer surfaces of the two rotating plates 31a and 31b, respectively, restrict the rotation range of the rotation frame 30 by being in contact with the inner peripheral surface of the cover 20.

The above-described printed circuit boards 40, 42, and 44 are connected to each other via an electric wire 47. An electric wire 47 connecting the printed circuit board 40 and the printed circuit board 42 in the body 10 and the printed circuit board 44 in the rotating frame 30 is formed by a notch formed in the printed circuit board 40.
It is designed to be inserted through 41a. Further, the electric wire 47 connecting the printed board 44 in the rotating frame 30 to the other printed boards 40 and 42 rotates the rotating frame 30 so that the wire 47 does not break when the rotating frame 30 rotates. It is set to allow more time than possible. 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 formed of a material that transmits infrared rays, such as high-density polyethylene, and is formed in a rectangular shape as shown in FIG. A hook 61 is protruded. Further, reinforcing ribs 62 are formed along both side circles provided with the engaging hooks 61, and further,
Press-fit projections 63 are formed at each corner of the lens plate 60. The lens plate 60 has a peripheral portion of the lens plate 60 placed on a support rib 39 formed along the periphery of the rotary plates 31a and 31b of the rotary frame 60, and both side frames 32 of the rotary frame 30. By engaging the engaging hooks 61 with the engaging recesses 38 formed in the lower portion of the inner peripheral surface of the rotating frame 30, the rotating frame 30 is held in a semicircularly curved shape. A concave groove 39a is formed in the support rib 39. As shown by a two-dot chain line in FIG.
The press-fit projection 63 is press-fitted into the 39a, and the reinforcing rib 62 is inserted into a gap formed between the side frame 32 and the support rib 39. By fixing the corners of the lens plate 60 to the rotating frame 30 in this manner, it is possible to prevent the corners of the thin lens plate 60 from warping. Here, both the reinforcing ribs 62 and the press-fit projections 63 are used,
Either one is effective. When the lens plate 60 is mounted on the rotating frame 30, the lens plate 60 is composed of a plurality of regions so that, for example, a detection area D as shown in FIG. 9 is formed. It goes without saying that the focal point for each area is set on the detection surface of the pyroelectric element P. Here, the ninth
9A shows a plane orthogonal to the rotation axis of the rotation frame 30, and FIG. 9B shows a detection area D in a plane including the rotation axis of the rotation frame 30 and the pyroelectric element P. Thus, a detection area D is defined as a range of approximately 90 ° in a plane substantially perpendicular to the rotation axis. As described above, since the detection area D is controlled by the lens plate 60, when a product having a different detection area D is obtained, only the lens plate 60 needs to be replaced, and the design can be changed economically. Further, since the flat lens plate 60 is curved as described above, the manufacture is easy, and in that respect, the cost can be reduced.

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. The rotation range of the rotation frame 30 is determined by the stopper 37 as described above.
The a and 37b are 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 D with the rotation frame 30 fixed is approximately 90 °, the detection area D can be adjusted within a range of 170 ° by rotating the rotation frame 30. On the front surface of the cover 20, at a portion different from the rotating frame holding plates 24a and 24b, a handle insertion hole 25 for exposing a handle 71 of a switch SW, which will be described later, and a light receiving hole 2 for exposing the photoelectric element PD.
6. Each of the display holes 27 exposing the display element LD composed of a light emitting diode is formed. Handle insertion hole 25, light receiving hole
26, a nameplate 28 is provided at a portion straddling the display hole 27. Here, the nameplate 28 has a through hole at a position corresponding to the handle insertion hole 25.
28a, and light-transmitting portions 28b and 28c at portions corresponding to the light receiving hole 26 and the display hole 27, respectively. 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 cover 20. This part is
When the case 1 is mounted on the mounting frame and the JIS standard flash plate is placed on the front side of the case 1, the part covered by the flash plate may be accidentally touched by anyone other than the installer. I am trying not to.

Between the rotating frame holding plates 24a and 24b in the cover 20, a lens cover made of a synthetic resin molded product transparent to infrared rays.
64 is installed. The lens cover 64 is formed in a semi-cylindrical shape, and a pair of locking pieces 65 project from both side edges thereof. The locking piece 65 is locked to the inner peripheral surface of the cover 20 as shown in FIG. 6, and the lens cover 64 is fixed to the cover 20. Since the lens cover 64 is disposed so as to be substantially in close contact with the outer surface of the lens plate 60, it is possible to prevent a hand from directly touching the lens plate 60 and prevent a change in detection sensitivity due to contamination of the lens plate 60. Like that. Here, since the lens plate 60 is a Fresnel lens, it is thin and easily bent, and it is difficult to wipe off when dirt adheres. As a result, some dirt can be easily wiped off, and a change in detection sensitivity can be prevented. Further, the lens cover 64 is formed separately from the cover 20, but if the lens cover 64 is formed integrally with the cover 20 by two-color formation, assemblability is improved. Furthermore, since the lens cover 64 only needs to be transparent to infrared rays, a material that is opaque to visible light can be used. It also has the effect of eliminating it.

The circuit section is configured as shown in FIG. The above-mentioned four terminals 50a to 50d 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 terminal. 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. Output level is constant for H
It is configured to be a level. This time can be changed by adjusting the variable resistor VR. This adjustment range is set, for example, from about 10 seconds to about 6 minutes. Further, a photoelectric element PD made of CdS is connected to the enable terminal ENA, and the photoelectric element P
When the amount of received light at D exceeds a predetermined value, the output terminal OUT of the processing circuit IC is maintained at L level regardless of the output of the pyroelectric element P. Output terminal OUT of processing circuit IC
Is connected to the relay control circuit 83 via the switch SW. The relay control circuit 83 is a circuit in which a series circuit of a switch element Q composed of a transistor, a relay coil H and a display LD composed of a light emitting diode is connected to a power supply circuit 81, and the control terminal of the switch element Q is at H level. During this time, 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,
Three states can be selected: a state where the control terminal of the relay control circuit 83 is set to either the H level or the L level, and a state where the control terminal is connected to the output terminal OUT of the processing circuit IC. Therefore, by operating the switch SW, the relay control circuit
If the control terminal 83 is manually set to either the H level or the L level, the contact r is turned on or off accordingly. Further, if a state in which 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. It produces output. However, when the amount of light received by the photoelectric element PD is equal to or more than a predetermined value, the contact r is turned off regardless of whether or not the pyroelectric element P detects a human body, and the generation of an external output is prohibited.

Here, power supply circuit 81, low voltage circuit 82, relay control circuit
83, the switch SW, and the photoelectric element PD are mounted on the printed board 40, the variable resistor VR and the capacitor C are mounted on the printed board 42, and the processing circuit IC is mounted on the printed board 44. The printed circuit board 44, as shown in FIG.
Most of the conductive pattern on the surface on which the pyroelectric element P is arranged is formed so as to be the ground pattern E. The effect of noise generated when the switch SW is switched and external noise mixed into the power supply is enhanced by enhancing the shielding effect. And prevent malfunctions. To further enhance the shielding effect,
A cider plate may be provided on the printed circuit board 44 at a distance from the surface opposite to the pyroelectric element P. Also,
It is also effective to provide a noise prevention component such as a capacitor for preventing noise to the processing circuit IC on the printed circuit board 44.

Also, as shown in FIG. 12 (a), the terminal 50a and the terminal 50c
And between the terminal 50b and the contact r of the relay Ry by the electric wire 84, a voltage contact output is obtained in this state, and as shown in FIG. Relay R
Connect the contact r of y with the electric wire 34, and connect the terminals 50a and 50b
If the gap between them is opened, a no-voltage contact output can be obtained. That is, a conductive pattern that allows such a connection change is formed on the printed circuit board 40.

In the above embodiment, the photoelectric element PD is arranged on the printed circuit board 40, but as shown by an imaginary line in FIG.
If the photoelectric element PD is provided adjacent to the pyroelectric element P on the printed circuit board 44, the direction of the light receiving surface of the photoelectric element PD always coincides with the direction of the light receiving surface of the pyroelectric element P, The brightness in the detection area D can be reliably grasped by the photoelectric element PD.

According to the first aspect of the present invention, a cover is provided on the front side of a body having a front opening so as to achieve the object of increasing the mounting efficiency in a case and providing a small and highly functional human body detector. Is a case formed by combining
A case in which at least one pair of locking claws, which have dimensions corresponding to the individual module and can be coupled to a mounting frame for wiring equipment fixed to the construction surface, are integrally provided on both side edges of the cover, A rotating frame mounted on the case so as to be freely rotatable, a first printed circuit board held by the rotating frame so as to rotate integrally with the rotating frame, and a first printed circuit board mounted on the first printed circuit board. A hot-wire sensor that detects an intruder in the detection area formed in front of the case and generates an external output,
A second printed circuit board connected to the first printed circuit board via an electric wire and housed in a case, and mounted on a rotating frame so as to be disposed in front of a detection surface of the heat ray sensor to determine a detection area; A first printed circuit board provided with a lens plate, a rotating frame rotatable with respect to the front surface of the case, and held by the rotating frame so as to rotate integrally with the rotating frame. Since the heat ray sensor is mounted on the mounting surface, there is an advantage that the detection area of the heat ray sensor can be changed by rotating the rotating frame in a state where the case is fixed to the construction surface. Moreover, since the lens plate for determining the detection area is mounted on the rotating frame, the positional relationship between the heat ray sensor and the lens plate is kept constant when the rotating frame is rotated with respect to the front surface of the case. Thus, there is an effect that the detection accuracy can be maintained even if the detection area is changed by the rotation of the rotation frame. Furthermore, since the first printed circuit board on which the heat ray sensor is mounted and held by the rotating frame is provided separately from the second printed circuit board housed in the case, the first printed circuit board that rotates together with the rotating frame Can be formed in a small size, and as a result, there is an advantage that the rotating frame is small and lightweight, and the rotating operation on the case becomes easy.

In addition, the case is formed by connecting the body and the cover, and the locking claw having a size corresponding to three large square modules of the wiring device and capable of being connected to the mounting frame for the wiring device fixed to the construction surface. At least one pair is provided on each side edge of the cover, so that it can be used as a mounting frame for wiring equipment when fixing to a construction surface such as a wall surface. This eliminates the need for manufacturing, and has the effect of suppressing an increase in design or manufacturing costs. In addition, it is necessary for the contractor to learn new construction techniques by applying the wiring method to the wiring method. Therefore, there is an effect that it is possible to suppress an increase in the cost of preparing a manual on the construction method and the cost of education of the construction method. In addition, since the locking claws are integrally formed on the cover, there is an advantage that the number of parts is reduced as compared with the case where the locking claws are provided on another component.

According to the second aspect of the present invention, when a photoelectric element that inhibits generation of an external output when the amount of ambient light is equal to or more than a predetermined amount is provided, the external output is stopped when the amount of ambient light is equal to or more than a predetermined value. If the external output is used for turning on / off the lighting equipment, the lighting can be kept off when the surroundings are bright and lighting is unnecessary.

According to the third aspect of the present invention, in the case where the ground pattern is formed over substantially the front surface of the first printed board except for the portion where the conductive pattern necessary for connection of the heat ray sensor is formed, the heat ray sensor is mounted. Since the large ground pattern is formed on the first printed circuit board, it is possible to prevent the output of the hot wire sensor, which is a minute current, from being affected by noise.

In the case where the lens cover is attached to the case with the mold that covers the lens plate as in the invention of claim 4, since the lens plate is covered with the lens cover, dirt does not easily adhere to the lens plate, and the change in the detection area is reduced. Will be prevented.

According to a fifth aspect of the present invention, the lens plate is made of a flexible material and the engaging portions formed on both side edges detachably engage with the engaging portions of the rotating frame. The detection area can be easily changed by changing the specifications of the lens plate.

According to a sixth aspect of the present invention, in which the length of the electric wire is set to a length having a margin more than the rotation frame can rotate,
Since the length of the electric wire connecting the first printed board and the second printed board has a margin, the wire can be used without breaking when the rotating frame is rotated.

[Brief description of the drawings]

1 is an exploded perspective view showing one embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a vertical sectional view of the same, FIG. 4 is a front view of the same with a cover removed, FIG. 5 is a cross-sectional view of the above, FIG. 6 is a cross-sectional view of the above-mentioned rotary frame in a rotated state, and FIGS. 7 (a) to (d) are plan views of the above-described rotary frame. , Sectional view, bottom view, top view, FIG. 8 (a)
(B) is a front view and a bottom view of the lens plate used in the above, respectively, FIG. 9 is an operation explanatory view showing an example of the detection area in the above, FIG. 10 is a circuit diagram of a circuit part used in the above, and FIG. 12 (a) and 12 (b) are circuit diagrams showing examples of the use of the above-mentioned printed circuit board. 1 ... case, 10 ... body, 20 ... cover, 22 ... locking claw, 30 ... rotating frame, 38 ... engaging recess, 40, 42, 44 ... printed circuit board, 47 ... Wire, 60 ... Lens plate, 61 ... Hook, 64 ... Lens cover, 81 ... Power circuit, 82 ...
Constant voltage circuit, D: detection area, E: earth pattern, IC: processing circuit, P: pyroelectric element, PD: photoelectric element.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-94797 (JP, A) JP-A-62-277529 (JP, A) JP-A-61-195021 (JP, A) JP-A 62-277521 197724 (JP, A) JP-A-62-277530 (JP, A)

Claims (6)

(57) [Claims] 1. A case formed by connecting a cover to the front side of a body having a front opening, and having a size corresponding to three large square modules of a wiring device and fixed to a construction surface. A case in which at least one pair of locking claws that can be coupled to the mounting frame are integrally protruded from both sides of the cover, a turning frame mounted on the case so as to be rotatable with respect to the front surface of the case, A first printed circuit board held by the rotating frame so as to rotate integrally with the moving frame, and an intruder detected in a detection area mounted on the first printed circuit board and formed in front of the case. A heat ray sensor for generating an external output, a second printed circuit board connected to the first printed circuit board via an electric wire and housed in a case, and a rotating frame so as to be disposed in front of a detection surface of the heat ray sensor. Lens that is attached to the camera and determines the detection area Human body detector characterized by comprising and. 2. The human body detector according to claim 1, further comprising a photoelectric element for inhibiting generation of an external output when the amount of ambient light is equal to or more than a predetermined amount. 3. The first printed circuit board according to claim 1, wherein an earth pattern is formed over substantially the entire surface of the first printed circuit board except for a portion where a conductive pattern necessary for connection of the heat ray sensor is formed. A human body detector as described. 4. The human body detector according to claim 1, wherein a lens cover is attached to the case so as to cover the lens plate. 5. The lens plate according to claim 1, wherein said lens plate is made of a flexible material, and engagement portions formed on both side edges are detachably engaged with engagement portions of a rotating frame. Item 3. A human body detector according to Item 1. 6. The human body detector according to claim 1, wherein the electric wire is set to have a sufficient length than the rotatable frame can rotate.