JP2595281B2 - Human body detection switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection switch having a hot-wire sensor and capable of obtaining a contact output when an intruder is present in a detection area of the hot-wire sensor.

[Related Art] Generally, a human body detection switch of this kind is used for performing operations such as automatically turning on a light or operating a ventilation fan when entering a toilet. . For this purpose, a device has been provided which opens and closes a switch element such as a relay by detecting a heat ray radiated from the human body (for example, Japanese Utility Model Application Laid-Open No. 62-7622).
No. 7). In this human body detection switch, as shown in FIG. 14, light is condensed on a pyroelectric element P, which is a heat ray sensor, and a detection area is set using a reflecting mirror M.

[Problem to be Solved by the Invention] In the above configuration, a reflecting mirror is used.
Generally, only one detection area is formed in the front direction, and as shown in FIG. 15, the standard arrangement height is 120 cm.
If a human body detection switch A is attached to an adult, it can be detected in the detection area D even at a short distance if the average height of the adult is about 170 cm, but it cannot be detected at a short distance when the infant becomes an average height of about 100 cm. Depending on the operating conditions, it may be desirable to keep a load such as a lighting or ventilation fan on and on continuously instead of turning it on and off in response to detection by a hot-wire sensor. Is not adopted.

An object of the present invention is to solve the above-described problems, and to perform an operation of always detecting an operation without responding to the detection of a heat ray sensor so that detection can be performed even at a short distance regardless of height. An object of the present invention is to provide a human body detection switch that can be selected.

Means for Solving the Problems In order to achieve the above object, the present invention provides a case in which locking claws inserted into holding holes provided in a mounting frame for a wiring device are provided on both side edges, and a case inside the case. A heat ray sensor provided in the case, a circuit section for turning on a switch element when an intruder is detected in a detection area of the heat ray sensor formed in front of the case, and a longitudinal direction disposed in front of a detection surface of the heat ray sensor. A lens plate made of a Fresnel lens having a plurality of areas for setting a plurality of detection areas below the front of the heat ray sensor,
A manual switch that can be switched between an automatic mode in which the switch element is turned on in conjunction with the heat ray sensor and a mode in which the switch element is always turned on irrespective of detection by the heat ray sensor, and the operation unit is exposed on the front surface of the case. .

[Operation] According to the above configuration, since a plurality of detection areas are formed below the front of the heat ray sensor, a plurality of detection areas can be set in accordance with the height of the user. Since a manual switch for switching to the mode is provided and the operation unit is exposed on the front surface of the case, an operation of keeping the switch on at all times without responding to the detection of the heat ray sensor can be easily selected. In addition, since locking claws to be inserted into the holding holes provided in the wiring device mounting frame are protrudingly provided on both side edges of the case, the wall surface and the like can be applied by applying ordinary wiring device construction techniques and construction members. Can be easily attached to

[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. The mounting part is
With respect to the metal mounting frame, protrusions of the metal mounting frame are inserted into locking holes 21 formed in pairs on the left and right side surfaces of the cover 20, respectively. With respect to the synthetic resin mounting frame, four locking claws 22 formed on each side edge of the cover 20 are inserted into holding holes formed in the synthetic resin mounting frame. Combined by things. One hook 23 is formed on each of the left and right side edges and the rear side edge of the lower surface of the cover 20, and the hook 23 is formed with a fitting hole 11 formed in the peripheral wall of the body 10.
Then, the body 10 and the cover 20 are connected to each other from inside of the peripheral wall of the body 10.

The inside of the body 10 is separated by a partition rib 12 into a circuit section storage chamber 13 and a pair of terminal storage chambers 14.
A pair of holding ribs 15 are formed in each of the inner peripheral surfaces of the left and right side walls of the rotating frame support plate 16 so that the left and right ends of the rotating frame support plate 16 are held in grooves between the holding ribs 15. 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 front surfaces (upper surfaces in FIG. 1) of the rotating frame supporting plate 16 and the rotating frame supporting rib 17 form arc-shaped rotating surfaces 16a and 17a, each of which has a concave central portion.
The turning frame 30 is rotatably supported between the upper surfaces of the turning frame 6 and the turning frame support rib 17. A first printed circuit board 40 on which a power supply circuit unit is mounted is housed in the body 10. 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 circuit board 40 is placed on the partition ribs 12 and the like, and a space is formed between the inner bottom surface of the body 10 and the printed circuit board 40, and the circuit components mounted on the printed circuit board 40 are The main circuit components on the printed circuit board 40 are to be housed in the space, in particular, at the site corresponding to the circuit part housing room 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 provided on the periphery of the printed circuit board 42.
Are formed, and the variable resistor VR and the switch SW are mounted.
Notch 41 formed on the periphery of first printed circuit board 40
An operation handle 72 of the variable resistor VR protrudes slidably from a part of a.

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.
The release button 53 is provided so as to be shared by both the lock springs 52. Each lock spring is on the bottom wall of the body 10.
An electric wire insertion hole (not shown) is formed corresponding to 52, and a part of the release button 53 is exposed so that the release button 53 is released against the spring force of the locking spring 52 by a jig such as a driver. The button 53 can be pressed. 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. At one place of the terminal board 51, a connecting piece 54 is provided so as to protrude upward.
The terminal 50 and the circuit portion on the printed circuit board 40 are electrically connected by being fixed to the solder by soldering.

The rotating frame 30 is formed by disposing a pair of rotating plates 31a and 31b formed in a disc shape and facing each other while being spaced apart from each other.
A third printed circuit board 44, which is formed in a frame shape connected by the above and mounts the pyroelectric element P as a heat ray sensor and its peripheral circuit portion, is mounted. The rotating plates 31a and 31b are
By being placed on 7a, 16a, the rotating frame 30 can be rotated with respect to the body 10. Printed board
A fixing notch 45 is formed on one side of 44, and a fixing protruding piece 46 protrudes from one side opposite to this side. Rotating frame 30
One rotating plate 31a has a notch 31a for fixing along the inner surface.
And a boss 33 corresponding to the other rotating plate.
The support hole 34 into which the fixing projection 46 is fitted is formed in the base 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
An operation groove 36 that is operated when adjusting the angle of the rotating frame 30 with respect to the body 10 is formed on the peripheral surface of a. Also, both rotating plates
Stoppers 37a, 37b for restricting the rotation range of the rotation frame 30 by contacting the outer peripheral surfaces of the cover 31 with the outer surfaces of the 31a, 31b.
Are respectively protruded.

The above-described printed circuit boards 40, 42, and 44 are connected to each other via jumper wires 47 made of flat cables. A first printed circuit board 40 and a second printed circuit board 42 in the body 10 and a third printed circuit board in the rotating frame 30
The jumper wire 47 connecting to the first printed circuit board 40
Through the notch 41a formed at the bottom.
An insulating sheet 48 is provided on the upper surface of the printed board 40 to prevent a 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 so that the upper surface side in FIG. 1 becomes a detection surface between both side frames 32, and a lens plate 60 for setting a detection area is provided in front of the detection surface of the pyroelectric element P. Is done. The lens plate 60 is a flat Fresnel lens formed of a material through which infrared light is transmitted, such as high-density polyethylene. 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 rotating plates 31a and 31b of the rotating frame 30.
The lens plate 60 on the support rib 39 formed along the periphery of
By placing the engaging hooks 61 in the engaging recesses 38 formed at the lower portions of the inner peripheral surfaces of the both side frames 32 of the rotating frame 30 in the shape of a semicircular shape. It is configured to be held by the rotating frame 30. As shown in FIG. 5 (a), the lens plate 60 is mounted so that the surface having irregularities is on the inside, and the surface on which the heat rays are incident is smooth, so that the loss of the incident light is reduced. It is. That is, as shown in FIG. 5 (b), when the uneven surface is on the outside, the heat ray incident on the rising portion cannot be guided inside, but since the outer surface is smooth, there is no waste. is there. A plurality of regions are formed on the lens plate 60. It goes without saying that the focal point for each area is set on the detection surface of the pyroelectric element P. Thus, the lens plate 60
In order to obtain a product having a different detection area D, only the lens plate 60 needs to be replaced, and the design can be performed 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 front surface of the cover 20 (that is, the front surface of the case 1 and the upper surface in FIG. 1), the rotating plates 31a and 31b of the rotating frame 30 are provided.
, A pair of rotating frame holding plates 24a, 24b are provided to hold each. The rotating frame holding plates 24a and 24b each have a peripheral wall,
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.

The detection area D is the fourth area in the plane including the axis of the rotating frame 30.
As shown in the figure, two regions are set below the front of the detection surface of the pyroelectric element P, and the center line (indicated by a dashed line) of each detection area D points downward from the front of the pyroelectric element P. To
It is set to 10 degrees and 40 degrees. In such a configuration,
If you set it to a typical mounting height of 120 cm, the average height is 100 cm
It is possible to detect even small distances from infants of about 170cm to adults of about 170cm.

On the front surface of the cover 20, a portion different from the rotating frame holding plates 24a and 24b includes a handle insertion hole 25 for exposing a handle 71 of a switch SW described later, a light receiving hole 26 for exposing the light receiving element PD, and a light emitting diode. The display holes 27 exposing the display elements LD are respectively formed. 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 position corresponding to the handle insertion hole 25.
And light transmitting portions 28b and 28c at portions corresponding to the light receiving hole 26 and the display hole 27, respectively. In the center of one side of the cover 20, a handle for operating the above variable resistor VR
A handle exposure hole 29 exposing 72 is formed. This part is a part that is 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. I try not to touch it by mistake.

In the cover 20, between the rotation frame holding plates 24a and 24b, a lens cover 64 made of a synthetic resin molded product through which infrared light can pass.
Is attached. The lens cover 64 is formed in a semi-cylindrical shape, and a pair of locking pieces 65 project from both side edges thereof. As shown in FIG. 3, the locking piece 65 is locked to the inner peripheral surface of the cover 20, and the lens cover 64 is fixed to the cover 20. Since the lens car 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. Since the lens cover 64 has a smooth surface and hardly adheres dirt, and a small amount of dirt can be easily wiped off, a change in detection sensitivity can be prevented.

The circuit section is configured as shown in FIG. The 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 as a switch element 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, for example, CF
A peripheral component is externally attached to an integrated circuit marketed under the name of 1651C or the like. When infrared light radiated from the human body is detected by the pyroelectric element P, the output level of the output terminal OUT is set to “H” for a certain time. It is configured so that 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 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 is a circuit in which a series circuit of a switch element Q composed of a transistor, a relay coil L and a display element 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 "H". 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, and sets the control terminal of the relay control circuit 83 to “H”,
It is possible to select one of three states: a state set to any of "L" and a state connected to the output terminal OUT of the processing circuit IC. 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 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 a human body is detected by the pyroelectric element P, the contact r is turned on for a predetermined time.

Here, power supply circuit 81, constant voltage circuit 82, relay control circuit
83, the light receiving element PD is mounted on the first printed board 40, the variable resistor VR and the switch SW are mounted on the second printed board 42, and the processing circuit IC is mounted on the third printed board 44. Is done.

In the above embodiment, the light receiving element PD is provided on the first printed circuit board 40.
However, if the light receiving element PD is provided on the third printed circuit board 44 adjacent to the pyroelectric element P, the orientation of the light receiving surface of the light receiving element PD and the orientation of the pyroelectric element P The direction of the light receiving surface always coincides, and the brightness in the detection area D can be reliably grasped by the light receiving element PD.

By the way, as shown in FIG. 7, three terminals may be provided on the load side, and the switch SW may be a double throw switch. In this case, one terminal on the power supply side is directly connected to one terminal on the load side, and the other terminal on the power supply side is connected to the switch SW.
, And both switching contacts of the switch SW are connected to the remaining terminals on the load side, respectively. Also the relay Ry
Is inserted between both switching contacts.

In this configuration, if the load L is connected as shown in FIG.
When the switch SW is turned on to the terminal connected to the load L, the mode is always on, and when the switch SW is turned on the other side, the mode is turned on and off automatically by the pyroelectric element P. In addition, as shown in FIG.
If the SW is turned on to the automatic flashing side, the externally-lit double throw switch SX can be used to switch between the always-on mode and the automatic flashing mode. If the mode can be set by the externally provided double-throw switch SX in this manner, the sensor section and the operation section can be easily separated, and the degree of freedom of construction can be increased.

The configuration shown in FIG. 9 has a plurality of contacts ra, rb that are turned on for different times from the point of detection by the pyroelectric element P.
Is provided. That is, when an intruder in the detection area is detected by the processing circuit IC including the pyroelectric element P, the contacts ra and rb of the relay control circuit 83 are turned on from that point, and the contacts ra and rb Is turned on the first time
As shown in FIG. Therefore,
If the loads La and Lb are connected to the respective contacts ra and rb, the operation times of the loads La and Lb can be shifted. This is effective, for example, when it is desired to keep the ventilation fan running even after the light is turned off in the toilet.

In the above configuration, the detection area D is set by the lens plate 60. However, as shown in FIG. 11, a mask plate 67 having a slit 66 may be provided to regulate the detection area D. Good. Here, if the mask plate 67 is slidable in a direction parallel to the detection surface, the detection area D can be changed. However, this adjustment range is within the detection area of the pyroelectric element P. Further, as shown in FIG. 12, a plurality of slits 66 may be provided in the mask plate 67. In this case, the formation pattern of the slit 66 can have various shapes as shown in FIG.

[Effects of the Invention] As described above, the present invention arranges a Fresnel lens in front of the detection surface of a heat ray sensor, and this Fresnel lens extends a plurality of detection areas below the front of the heat ray sensor in the vertical direction. Since there are a plurality of areas to be set, it is possible to set a detection area that can reliably detect an infant to an adult even at a short distance. In addition, a manual switch that switches between the automatic mode and the always-on mode is provided, and the operation unit is exposed on the front of the case, making it easy to keep the operation on without responding to the detection of the hot-wire sensor. The advantage is that you can choose. In addition, since locking claws to be inserted into the holding holes provided in the wiring device mounting frame are protrudingly provided on both side edges of the case, the wall surface and the like can be applied by applying ordinary wiring device construction techniques and construction members. Has the effect that it can be easily attached to a vehicle.

It has two terminals on the power supply side and three terminals on the load side,
One terminal on the power supply side is directly connected to one terminal on the load side, the other terminal on the power supply side is connected to the common contact of the double throw switch, and both switching contacts of the double throw switch are connected to the remaining terminals on the load side. In the case where the switch element is connected and the switch element is inserted between the two switching contacts of the double throw switch, it is possible to switch between the always-on mode and the automatic mode by operating the double throw switch, An external switch can be connected to the load side terminal so as to have the same function as the double throw switch, and there is an advantage that the always-on mode and the automatic mode can be selected by the external switch.

Furthermore, if the circuit unit is provided with a plurality of switch elements that are turned on for a set time from the time when the intruder is detected, the operation time of the ventilation fan is set to be smaller than the lighting time of the lighting when used in a toilet or the like. Can also be used, for example, to make it longer.

If a mask plate having a slit for regulating the detection area of the heat ray sensor is provided in front of the detection surface of the heat ray sensor, the detection area can be regulated with a simple configuration.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is a transverse sectional view of the same, FIG. FIGS. 6 (a) and 6 (b) are explanatory diagrams of the operation of the lens plate of the above, FIG. 6 is a circuit diagram of a circuit unit of the above, FIG. 7 is a circuit diagram showing another embodiment of the present invention, and FIG. FIG. 9 is a circuit diagram showing an example of use, FIG. 9 is a block diagram showing still another embodiment of the present invention, FIG. 10 is an operation explanatory view of the above embodiment, and FIGS. 11 and 12 show another embodiment of the present invention. FIG. 13 is a front view showing an example of the mask plate used in the above, FIG. 14 is an exploded perspective view showing a conventional example, and FIG. 15 is an operation explanatory view showing the problems in the above. 1 ... case, 60 ... lens plate, 66 ... slit, 67 ...
... Mask plate, D ... Detection area, P ... Pyroelectric element, r, r
a, rb …… Contacts, SW …… Switches.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Konishi 1048 Ojimon Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Works Co., Ltd. 56) References JP-A-62-277531 (JP, A)

Claims (4)

(57) [Claims] 1. A case in which locking claws inserted into holding holes provided in a mounting frame for a wiring device are protruded from both side edges, a heat ray sensor provided in the case, and a heat ray formed in front of the case. A circuit section that turns on a switch element when an intruder is detected in the detection area of the sensor, and a plurality of detection areas disposed in front of the detection surface of the heat ray sensor and vertically below the front of the heat ray sensor. A lens plate consisting of a Fresnel lens having multiple areas to be set, an automatic mode in which the switch element is turned on in conjunction with the heat ray sensor, and a mode in which the switch element is always turned on regardless of the detection by the heat ray sensor can be operated. A manual switch having a part exposed to the front of the case. 2. A power supply system comprising two terminals on the power supply side and three terminals on the load side, wherein one terminal on the power supply side is directly connected to one terminal on the load side, and the switch is a double throw switch. The other terminal on the power supply side is connected to a common contact of the double throw switch, and both switching contacts of the double throw switch are respectively connected to the remaining terminals on the load side, and the switch element is connected to the double throw switch. The human body detection switch according to claim 1, wherein the switch is inserted between the two switching contacts. 3. The human body detection switch according to claim 1, wherein the circuit unit includes a plurality of switch elements that are turned on for a set time from when the intruder is detected. 4. The human body detection switch according to claim 1, wherein a mask plate having a slit for regulating a detection area of the heat ray sensor is provided in front of a detection surface of the heat ray sensor.