JP2000057915A - Human body detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a human body detector easy to manufacture and capable of cost reduction. SOLUTION: A case 1 is constituted of a body 10 and a cover 20. A lens plate 33 is mounted to a circuit board 43 mounted with a heat ray sensor 2 so as to cover the sensor 2. The circuit board 43 is fixed at the backside of the cover 20. The lens plate 33 is inserted into an inserting hole formed in the bottom of a first recess 25. A detection area adjusting member 35 is fit to the cover 20 so as to cover the plate 33. The detection area adjusting member 35 is formed in a frame shape wherein a pair of end plates formed in a half- round shape is coupled to a pair of side frames 35b. Further, the detection area adjusting member 35 is continuously and integrally formed on one of the side frame 35 so that a mirror 36 formed with two mirror surfaces 36a and 36b for changing the direction of the detection area formed with the lens plate 33 couples the end plates each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detector which generates a human body detection output by detecting a heat ray radiated from a human body.

[0002]

2. Description of the Related Art Hitherto, a human body detector used for the purpose of detecting the entrance of a person such as an entrance or a toilet using a heat ray sensor composed of a pyroelectric element or the like and automatically turning on a lighting load has been known. Provided. In this type of human body detector, a case containing a signal processing unit that generates a human body detection output based on the output of the heat ray sensor is mounted on a wall or ceiling, and a switch element is inserted into the power supply path to the lighting load. In general, the lighting load is controlled to be turned on and off by setting the lighting load.

Here, a human body detector attached to a wall forms a case 1 by connecting a body 10 and a cover 20 as shown in FIG. 11, for example.
The case 1 is provided with a rotating frame 30 that is rotatable with respect to the front surface. In this human body detector, the circuit board 43 ′ on which the heat ray sensor 2 is mounted is fixed to the rotating frame 30,
By manually operating a direction adjustment knob 30a protruding from a part of the rotating frame 30, the rotating frame 30 can be rotated. In the illustrated example, it is possible to rotate about 40 degrees clockwise and counterclockwise in FIG. That is, the heat ray sensor 2
In order to adjust the detection area of the heat ray sensor 2, the direction of the detection surface of the heat ray sensor 2 is adjusted by housing the heat ray sensor 2 in a rotating frame 30 rotatably held with respect to the case 1. . Here, from the bottom surface of the body 10, a support rib 14 having a tip end surface in an arc shape is protrudingly provided.
Is formed between the inner peripheral surface of one of the peripheral walls of a pair of semicircular rotating frame holding plates (not shown) protruding from the front surface of the cover 20 and the distal end surface of the support rib 14. The support rib 14 is held so as to be rotatable by slidingly contacting the distal end surface. The other end of the rotating frame 30 is rotatably held between the inner peripheral surface of the other peripheral wall of the rotating frame holding plate (not shown) and a support member (not shown). The circuit board 43 'is connected to the circuit board 41 on which other circuit components are mounted by connection lines (not shown).

Further, a lens plate 33 'is mounted on the front side of the rotating frame 30 in a curved shape. Lens plate 33 '
Is a Fresnel lens formed of a material such as high-density polyethylene that easily transmits heat rays, has a plurality of focal points, and divides the detection area of the heat ray sensor 2 into a plurality of areas. FIG. 11 shows a detection area D in a plane substantially perpendicular to the rotation axis of the rotating frame 30 set by the lens plate 33 '. Here, the detection area D when the rotating frame 30 is fixed at the position shown in FIG. 11 is substantially 90 degrees, and the center of the detection area D is located upward in FIG.

[0005]

However, in the above-described conventional configuration, it is necessary to rotate the rotating frame 30 in order to adjust the detection area D. It is necessary to improve the dimensional accuracy of the frame holding plate and the like, and there is a problem that the manufacturing is difficult and the cost increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a human body detector that can be easily manufactured and that can be manufactured at low cost.

[0007]

According to a first aspect of the present invention, there is provided a heat-ray sensor in a case for achieving the above object.
A human body detector that obtains a human body detection output according to the presence or absence of a person in a detection area of a heat ray sensor formed in front of a case, wherein a lens plate is provided so as to cover the heat ray sensor, and a lens plate is provided. And a detection area adjusting member provided with a mirror for changing the direction of the detection area formed by the method described above is detachably mounted on the front side of the case with respect to the case. Since a frame is not required, the detection area can be easily set simply by attaching and detaching the detection area adjustment member and changing the specifications, making it easier to manufacture, reducing costs, and increasing the manufacturing cost due to the change in the detection area. Is reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the detection area adjusting member is provided with a display portion for displaying a direction of a detection area formed when the detection area adjusting member is mounted. Therefore, it is possible to visually recognize the direction of the detection area with the detection area adjustment member attached,
It is possible to eliminate mounting errors of the detection area adjusting member at the time of construction or the like.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the detection area adjusting member can be mounted in a state rotated by 180 degrees in a plane parallel to the detection surface of the heat ray sensor. Since the detecting means is provided, it is possible to select and set two detection areas having different directions of the center of the detection area in a plane orthogonal to the detection plane by one detection area adjusting member.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the lens cover is disposed on the front side of the detection area adjustment member so as to cover the lens plate and the detection area adjustment member. The lens plate and the detection area adjusting member can be prevented from being damaged, and the appearance can be improved.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the case is formed such that a front surface of the case is exposed from an opening window of the mounting frame to a mounting frame for an embedded wiring device. Since it is formed in a size corresponding to three embedded wiring devices of a unit size that can be installed and connected up to a maximum of three, and a mounting portion for mounting in the mounting frame is formed, an outlet is provided. Since it can be installed by the same construction method as embedded wiring devices such as switches and switches, construction work is easy for installers, and it can be attached to the mounting frame for embedded wiring devices, There is no need to separately prepare a dedicated mounting frame, so that manufacturing costs can be reduced and inventory management becomes easy.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a case 1 is made of a synthetic resin molded product, and is formed by connecting a body 10 and a cover 20 together. Case 1 is a large-sized continuous wiring device that can be attached to a mounting frame for three large-sized continuous wiring devices standardized by the JIS standard.
It is formed to the size of an individual module. In other words, up to three cases 1 can be attached to the mounting frame for the embedded wiring device so that the front surface of the body is exposed through the opening window of the mounting frame. Type 3 of wiring equipment
It is formed in a size corresponding to an individual. Here, the mounting frame includes a metal mounting frame 60 shown in FIG. 2 and a synthetic resin mounting frame (not shown).

The case 1 has a mounting hole 21 with which the holding claw 68 of the metal mounting frame 60 engages and a mounting claw 22 with which the holding claw 22 of the synthetic resin mounting frame engages. , And only one case 1
Can be attached. At the rear surface of the cover 20, connecting legs 23 provided with connecting claws 23a at the distal end project at three places: both side surfaces of the cover 20 and one end surface in the longitudinal direction of the cover 20 (the right end surface in FIG. 2). Then, each coupling leg 23 is inserted into the coupling hole 11 formed in the peripheral portion of the body 10 and the coupling claw 23a is locked to the peripheral edge of the coupling hole 11 (see FIG. 11).
Are combined.

In the body 10, a circuit section storage chamber 12 and a pair of terminal storage chambers 13 are formed. Further, a circuit board 41 on which a power supply circuit section, a mode changeover switch SW described later, and the like are mounted is housed in the circuit section storage chamber 12. Each terminal storage chamber 13 has a terminal 50 composed of a quick-connecting terminal.
Is delivered. The terminal 50 includes a locking spring 51 and a terminal plate 52.
And a release button 53. The electric wire inserted through an electric wire insertion hole (not shown) formed in the bottom of the body 10 is moved between the locking spring 51 and the terminal plate 52 by the spring force of the locking spring 51. To be held. Also, the body 10
By inserting a jig such as a screwdriver through the button operation hole 16 drilled on the bottom surface and operating the release button 53, the locking spring 51 is bent to separate the locking spring 51 from the terminal plate 52,
The wires are easily pulled out. Note that the terminal plate 52
Are soldered to the circuit board 41.

By the way, in the conventional configuration shown in FIG.
Although the lens plate 33 ′ made of a Fresnel lens is attached to the rotating frame 30, in the present embodiment, the lens plate 33 is mounted on the circuit board 43 on which the hot-wire sensor 2 is mounted so as to cover the hot-wire sensor 2. It is attached. Lens plate 33
Is shaped like a bowl, and a pair of connecting legs 33a projecting rearward from the periphery of the opening is inserted into engagement holes 43b formed on both sides of the heat ray sensor 2 in the circuit board 43. Thus, the locking claw 33b at the tip of the coupling leg 33a is locked to the periphery of the engagement hole 43b. The lens plate 33
Is a Fresnel lens formed of a material such as high-density polyethylene that easily transmits heat rays, has a plurality of focal points, and divides the detection area of the heat ray sensor 2 into a plurality of areas.

In the conventional configuration shown in FIG. 11, the circuit board 43 'on which the heat ray sensor 2 is mounted is fixed to the rotary frame 30 and is rotatable with respect to the cover 20. In this embodiment, the circuit board 43 on which the heat ray sensor 2 is mounted is inserted into the fixing screw 95 and the fixing screw 95 is attached to the screw mounting portion 24 on the rear side of the cover 20 as shown in FIG.
Is fixed to the cover 20 by screwing. The structure for fixing the circuit board 43 to the cover 20 includes, as shown in FIG. 4, a fixing leg 20a projecting rearward from the rear surface of the cover 20 and being flexible in the left-right direction in FIG. A structure may be adopted in which the fixing is performed using a rib 27 protruding rearward inside the leg 20a. The cover 20 has a circuit board 4 on the front side.
A first recess 25 is formed in front of 3, and a front portion of the lens plate 33 is exposed through an insertion hole 25 a formed in a bottom surface of the first recess 25. Note that each of the above-described circuit boards 4
1 and 43 are connected to each other via a connection line 44.

On the front side of the cover 20, a detection area adjusting member 35 is detachably mounted so as to cover the front part of the lens plate 33. The detection area adjusting member 35 is the same as that shown in FIG.
As shown in FIG. 6, a pair of end plates 37a and 37b formed in a semicircular shape are connected to each other by a pair of side frames 35b. The detection area adjusting member 35 is a mirror unit 3 having two mirror surfaces 36a and 36b for changing the direction of the detection area formed by the lens plate 33.
6 is continuously and integrally formed on one side frame 35b so as to connect the end plates 37a and 37b to each other.

A connecting leg 35c projects rearward from an intermediate portion of the rear surface of each side frame 35b, and engagement holes formed on both sides of the insertion hole 25a in a direction perpendicular to the longitudinal direction of the cover 20. The coupling leg 35c is inserted into the engagement leg 25b, and the locking claw 35d at the distal end of the coupling leg 35c is engaged with the periphery of the engagement hole 25b. Here, a pair of connecting legs 35c each having a locking claw 35d formed at the distal end thereof is connected to the detection area adjusting member 3.
5 can be mounted in a state rotated 180 degrees in a plane parallel to the detection surface of the hot-wire sensor 2, and can be mounted even if the left and right sides of the detection area adjustment member 35 in FIG. I can do it. The detection area adjusting member 35 is made of a molded product such as ABS resin, and is provided with mirror surfaces 36a, 36
b may be formed, or a metal plate may be bonded with an adhesive or a double-sided tape to form the mirror surfaces 36a and 36b with the metal plate.

Each end plate 3 of the detection area adjusting member 35
On the outer surfaces of 7a and 37b, display portions 38 for indicating the direction of the detection area D are formed, and the direction of the detection area D with the detection area adjusting member 35 attached can be visually recognized. Detection area adjustment member 35
The mounting mistake of can be eliminated.

Further, a lens cover 34 for covering the lens plate 33 and the detection area adjusting member 35 and closing the first recess 25 is detachably attached to the front side of the cover 20. The lens cover 34 is usually colored because it only needs to transmit infrared rays, and is formed of a material such as high-density polyethylene having a light-transmitting property. Lens cover 34
Is a lens cover body 34 having a backside opening in a semi-cylindrical shape.
a and a flange portion 34b formed continuously and integrally from the rear portion of the lens cover main body 34a and having a rectangular outer shape. The four connecting legs 34c protruding from the rear edge of the lens main body 34a It is inserted into an engagement hole 25c formed on the bottom surface of the first recess 25, and an engagement claw 34d at the tip of the coupling leg 34c is engaged with the periphery of the engagement hole 25c.

On the circuit board 43, in addition to the heat ray sensor 2,
A signal processing unit (not shown) that turns on and off a switch element inserted in a power supply path to a load based on an output signal of the hot-wire sensor 2 is mounted. In short, the signal processing unit generates a human body detection output based on the output signal of the heat ray sensor 2 (that is, according to the presence or absence of a person in the detection area).

The circuit board 41 is provided with a power supply circuit section for rectifying and smoothing the output of the commercial power supply connected via the pair of terminals 50, stabilizing the output, and supplying power to the signal processing section. The signal processing unit is configured to set the output level of the output terminal to a high level for a certain period of time when a heat ray is detected by the heat ray sensor 2, and detect a slight motion of a person to continuously output. When the heat ray radiated from the human body is no longer detected by the heat ray sensor 2, the output level of the output terminal becomes low after a certain time, and this fixed time is mounted on the circuit board 41. It can be changed by adjusting the variable resistor VR. Case 1 is included in the signal processing unit.
A light receiving element (not shown) for detecting the brightness in front of the camera is connected, and the operation of the signal processing unit is stopped when the amount of received light detected by the light receiving element exceeds a predetermined amount. The fixed amount can be adjusted by the operation illuminance adjustment switch 72 mounted on the circuit board 41.
A handle 71 of the variable resistor VR and a handle 73 of the operation illuminance adjustment switch 72 are provided with exposed holes 28b, 2 formed in the bottom surface of the second recess 28 formed on the front side of the cover 20.
8c, it is exposed on the front side of the cover 20. here,
The handles 71 and 73 are covered by a lid 6 which is attached to the front side of the cover 20 so as to be freely opened and closed.

Further, the circuit board 41 includes the heat ray sensor 2
The automatic mode in which the lighting load is automatically controlled based on the output signal of the heat ray sensor, the ON mode in which the lighting load is always turned on regardless of the output signal of the heat ray sensor 2 (continuous input mode), and the output signal of the heat ray sensor 2 A mode changeover switch SW including a three-contact switch capable of selecting an off mode (off mode) for always turning off a lighting load regardless of the lighting load is mounted. Handle 101 for operating mode changeover switch SW
Is exposed to the front surface of the cover 20 through an exposure hole 28a formed in the bottom surface of the second recess 28 of the cover 20. Here, the handle 101 protrudes forward of the case 1 from the notch 6 d of the door 6. The door 6 is formed of a synthetic resin or the like, and has protrusions 6 c protruding from both sides on one end side, which are locked on both sides of the groove 29 of the second recess 28. Mode switch SW handle 101
On the back surface, two retaining legs 101a each having an engaging claw at the end are projected, and each retaining leg 101a is inserted into the exposure hole 28a, and is engaged with the peripheral edge of the exposure hole 28a to be prevented from falling off.

At the time of construction on a wall or the like, case 1
Is attached to the above-mentioned mounting frame. For example, the metal mounting frame 60 is formed in a frame shape in which both ends of a pair of side pieces 61a and 61b are connected by mounting pieces 62, respectively, and the side pieces 61a and 61b are formed on the side surface of the case 1. A holding claw 68 inserted into the mounting hole 21 is protruded, and a notch hole 6 is formed in a portion of one of the side pieces 61a corresponding to the holding claw 68.
3 is drilled, and a jig such as a screwdriver is inserted into the cutout hole 63 and pryed, so that a part of the side piece 61 a can be plastically deformed so that the holding claw 68 is inserted into the mounting hole 21. It has become. Each mounting piece 62 has a long hole 64 into which a box screw is inserted so that the metal mounting frame 60 can be mounted on an embedded box such as a switch box.
In addition, a screw hole 65 into which a plate screw is screwed is formed so that a decorative plate that covers the front surface of the metal mounting frame 60 is attached. Further, a metal fitting mounting hole 66 is formed so that a well-known scissor metal fitting for holding a wall panel or the like between the metal mounting frame 60 and the metal mounting frame 60 can be mounted.

By the way, when the detection area adjusting member 35 is not mounted on the cover 20 as shown in FIG. 7, the center axis of the detection area D is orthogonal to the detection surface of the heat ray sensor 2 and upward in FIG. is there. On the other hand, by attaching the detection area adjusting member 35 shown in FIGS. 5 and 6 to the cover 20, heat rays (infrared rays) are reflected by the mirror surfaces 36a and 36b, and the direction of the heat rays is changed. Here, the mirror surfaces 36a and 36b are formed so that the center axis of the detection area D rotates counterclockwise by 40 degrees as shown in FIG. Also, in FIG. 1, the detection area adjustment member 35 can be mounted even when the left and right sides are reversed. Therefore, by mounting the detection area adjustment member 35 with the left and right sides reversed, the center axis of the detection area D is It will rotate 40 degrees more clockwise than 7.

Further, as shown in FIGS. 9 and 10, a detection area adjusting member 35 having only one mirror surface 36a formed on the mirror portion 36 is mounted as shown in FIG. Can be changed. Here, the mirror surface 36a is formed such that the center axis of the detection area D is rotated by 20 degrees counterclockwise as compared with FIG. 7 as shown in FIG.

Thus, in the human body detector of the present embodiment,
A lens plate 33 is provided so as to cover the detection surface of the heat ray sensor 2, and a detection area adjusting member 35 provided with mirror surfaces 36 a and 36 b for changing the direction of the detection area formed by the lens plate 33 is provided on the case 1. Since it is detachably attached to the case 1 on the front side, the conventional rotating frame 3
0 is not required, and the detection area can be easily set only by attaching and detaching the detection area adjusting member 35 and changing the specification. Therefore, the manufacturing becomes easy, the cost can be reduced, and the manufacturing cost increases due to the change of the detection area. Is reduced.

Since it is not necessary to rotate the circuit board 43 'as in the conventional structure shown in FIG.
The disconnection of the connection line 44 connecting the circuit board 3 and the circuit board 41 can be prevented.

[0029]

According to the first aspect of the present invention, there is provided a human body detector having a heat ray sensor in a case and obtaining a human body detection output according to the presence or absence of a person in a detection area of the heat ray sensor formed in front of the case. A lens plate is provided so as to cover the heat ray sensor, and a detection area adjustment member provided with a mirror for changing the direction of the detection area formed by the lens plate is attached to and detached from the case on the front side of the case. Since it is freely mounted, the conventional rotating frame is not required, so the detection area can be easily set only by attaching and detaching the detection area adjustment member and changing the specifications, making it easy to manufacture and low cost. Therefore, there is an effect that the increase in the manufacturing cost due to the change of the detection area is reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the detection area adjusting member is provided with a display portion for displaying a direction of a detection area formed when the detection area adjusting member is mounted. Therefore, it is possible to visually recognize the direction of the detection area with the detection area adjustment member attached,
There is an effect that it is possible to eliminate mounting errors of the detection area adjusting member at the time of construction or the like.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the detection area adjusting member can be mounted in a state of being rotated by 180 degrees in a plane parallel to the detection surface of the heat ray sensor. Since the detecting means is provided, it is possible to select and set two detection areas having different directions of the center of the detection area in a plane orthogonal to the detection plane by one detection area adjusting member.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the lens cover is disposed on the front side of the detection area adjustment member so as to cover the lens plate and the detection area adjustment member. There is an effect that the lens plate and the detection area adjusting member can be prevented from being damaged.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the case is formed such that a front surface of the case is exposed from an opening window of the mounting frame to a mounting frame for an embedded wiring device. Since it is formed in a size corresponding to three embedded wiring devices of a unit size that can be installed and connected up to a maximum of three, and a mounting portion for mounting in the mounting frame is formed, an outlet is provided. Since it can be installed by the same construction method as embedded wiring devices such as switches and switches, construction work is easy for installers, and it can be attached to the mounting frame for embedded wiring devices, There is no need to separately prepare a dedicated mounting frame, which has the effect of reducing manufacturing costs and facilitating inventory management.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a sectional view of a main part of the above.

FIG. 4 is a cross-sectional view showing another configuration example of the main part of the above.

FIG. 5 is a perspective view of a detection area adjusting member used in the embodiment.

FIG. 6 is a bottom view of the detection area adjustment member used in the embodiment.

FIG. 7 is a cross-sectional view showing a state where a detection area adjustment member is removed in the above.

FIG. 8 is a sectional view of another configuration example of the above.

FIG. 9 is a perspective view of a detection area adjustment member used in the first embodiment.

FIG. 10 is a bottom view of the detection area adjustment member used in the embodiment.

FIG. 11 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Heat ray sensor 10 Body 20 Cover 33 Lens plate 34 Lens cover 35 Detection area adjustment member 35b Side frame 36 Mirror part 36a, 36b Mirror surface 37a, 37b End plate 41 Circuit board 43 Circuit board

Claims (5)

[Claims] 1. A human body detector having a heat ray sensor in a case and capable of obtaining a human body detection output according to the presence or absence of a person in a detection area of the heat ray sensor formed in front of the case,
A lens plate is provided so as to cover the heat ray sensor,
A human body detector, wherein a detection area adjusting member provided with a mirror for changing the direction of a detection area formed by a lens plate is detachably attached to the case on the front side of the case. 2. The human body detection according to claim 1, wherein the detection area adjustment member is formed with a display unit for displaying a direction of a detection area formed when the detection area adjustment member is mounted. vessel. 3. The detection area adjusting member according to claim 1, further comprising a mounting unit that can be mounted in a state rotated by 180 degrees in a plane parallel to a detection surface of the heat ray sensor. A human body detector as described. 4. The lens cover according to claim 1, wherein a lens cover is provided on the front side of the detection area adjustment member so as to cover the lens plate and the detection area adjustment member.
A human body detector according to any one of the above. 5. A case having a unit size capable of being attached to a mounting frame for a buried type wiring device so that a maximum of three cases can be continuously mounted in such a manner that the front surface of the case is exposed from an opening window of the mounting frame. It is formed in dimensions equivalent to three of the plug-in type wiring devices,
The human body detector according to any one of claims 1 to 4, wherein a mounting portion for mounting to the mounting frame is formed.