JP2863230B2 - Heat ray sensing type human body detection switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention incorporates a heat-sensitive element for detecting a heat ray generated from a human body in a case, and controls a load by determining the presence or absence of a person in a detection area based on an output signal of the heat-sensitive element. The present invention relates to a sensing type human body detection switch.

[Prior art]

Conventionally, this type of heat ray sensing type human body detection switch,
It is used for the purpose of automatically turning on and off the lighting according to the presence or absence of a person in a room. The heat-sensing type human body detection switch mounted on a wall has a heat-sensitive element mounted on a rotating frame that is rotatable in the left-right direction with respect to the case. What can set a detection area is provided.

[Problems to be solved by the invention]

In the above conventional configuration, since the detection area is adjusted to the left and right, the height at which the heat ray sensing type human body detection switch is installed is limited, and there is a problem that the switch cannot be used depending on the conditions of the installation location. there were. The present invention is aimed at solving the above problems,
An object of the present invention is to provide a heat ray sensing type human body detection switch in which a detection area can be adjusted up and down so that a mounting height is not limited.

[Means for Solving the Problems]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a rotary frame held so as to be rotatable up and down with respect to the front surface of the case, and the thermosensitive element is mounted in the rotary frame. In addition, the angle of the detection surface of the thermal element with respect to the front surface of the case can be changed vertically. According to the second aspect of the present invention, the thermosensitive element is disposed at a fixed position in the case, and is slidable in front of the thermosensitive element with respect to the front surface of the case, and the inclination angle of the optical axis with respect to the front surface of the case in the vertical direction is different. A lens having a plurality of lens regions is provided, and an opening window for transmitting heat rays is formed on the front surface of the case so as to coincide with at least one lens region.

[Action]

According to the configuration of the first aspect, when the rotating frame is rotated with respect to the case, the angle formed by the detection surface of the thermal element with respect to the front surface of the case changes in the vertical direction. be able to. In the configuration of claim 2, by sliding the lens with respect to the case, the lens area exposed from the opening window of the case can be changed, and each lens area has an inclination angle of the optical axis with respect to the front surface of the case. Since they are different in the vertical direction, the incident direction of the heat ray can be changed in the vertical direction according to the lens area exposed from the opening window, and as a result, the detection area can be changed in the vertical direction.

Embodiment 1 As shown in FIGS. 1 to 3, 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 has a maximum of three mounting frames 60 for three large squares standardized by the JIS standard and the Japan Wiring Equipment Manufacturers Association.
It is formed in a size corresponding to three times the size of wiring equipment (called unit size) that can be attached up to the number.
Therefore, only one case 1 is attached to the mounting frame for three large squares.
Can be attached. The case 1 includes, as mounting portions to the mounting frame 60, a mounting hole 21 that engages with a holding claw of a metal mounting frame and a mounting claw 22 that engages with a holding hole of a synthetic resin mounting frame. 20 are formed on both sides. At the rear surface of the cover 20, connecting legs 23 having connecting claws 23a at the tip end are protruded at three places, and each connecting leg 23 is inserted into a connecting hole 11 formed in a peripheral portion of the body 10 to form a connecting claw. The cover 20 is connected to the body 10 by locking the 23a to the periphery of the connection hole 11. In the body 10, a circuit section storage chamber 12 and a terminal storage chamber 13 are formed. A pair of left and right support ribs 14, each of which has an arc-shaped distal end surface, is protruded from the bottom surface of the body 10. A first printed circuit board 41 on which a power supply circuit section is mounted and a second printed circuit board 42 on which a variable resistor VR and the like are mounted are housed in the circuit storage room 12. In the terminal storage chamber 13, a terminal 50 formed of a connection terminal is provided. The terminal 50 includes a lock spring 51, a terminal plate 52, and a release button 53. The electric wire inserted through the electric wire insertion hole 15 pierced in the bottom surface of the body 10 is connected to the lock spring 51.
Is held between the locking spring 51 and the terminal plate 52 by the spring force of the above. Also, by inserting a jig such as a screwdriver through the button operation hole 16 drilled in the bottom surface of the body 10 and operating the release button 53, the locking spring 51 is flexed to move the locking spring 51 from the terminal plate 52. Release the wire so that it can be easily pulled out. The terminal board 52 is soldered to the first printed circuit board 41. The rotating frame 30 holds a lens 32 made of a Fresnel lens between a pair of end plates 31, and the lens 32 is an end plate.
31 is curved in an arc shape along the periphery. Further, a third printed circuit board 43 mounted with a thermosensitive element 2 composed of a pyroelectric element and a signal processing circuit for determining the presence or absence of a person based on the output of the thermosensitive element 2 is held between both end plates 31. I have. At each end plate 31, at the end opposite to the lens 32, there is provided a projection 33 having a peripheral surface formed in an arc shape. The rotation projection 33 is mounted on the support rib 14, and the rotation frame 33 is slidably contacted with the end surface of the support rib 14, whereby the rotation frame 30 is held so as to be rotatable in the vertical direction. You. The lens 32 is formed of a material such as high-density polyethylene so as to easily transmit heat rays, has a plurality of focal points, and divides a detection area of the thermosensitive element 2 into a plurality of areas. That is, the pyroelectric element, which is the thermosensitive element 2, is a differential sensor, and an output signal can be obtained only when a change in the incident heat dose occurs. Therefore, the detection area of the thermosensitive element 2 is divided into a plurality of small areas. By dividing, it is possible to detect a slight movement of a person so that an output is continuously obtained. According to the above configuration, since the rotating frame 30 can rotate up and down with respect to the front surface of the case 1, the inclination angle formed by the detection surface of the thermal element 2 with respect to the front surface of the case 1 is changed up and down. As a result, the detection area can be adjusted in the vertical direction. The mode selection switch SW, the light receiving element PD, the display element LD, the knob of the variable resistor VR, and the like are exposed on the front surface of the case 1. The mode selection switch SW is a switch that can select an automatic mode for automatically controlling the load based on the output of the thermal element 2, an ON mode for forcibly turning on the load, and an OFF mode for forcibly turning off the load. It is. Further, the light receiving element PD detects the surrounding illuminance, and does not perform the automatic load control when the surroundings are bright. The display element LD blinks in response to the on / off of the load. Further, the variable resistor VR mounted on the second printed circuit board 42 sets the time for which the load is kept on after the heat ray is detected by the thermosensitive element 2. By the way, at the time of construction on a wall surface or the like, the case 1 is attached to a mounting frame 60 for wiring equipment. For example, as shown in FIG. 4, the metal mounting frame 60 is formed in a frame shape in which both ends of a pair of side sides 61a and 61b are connected by mounting pieces 62, respectively. A holding claw (not shown) inserted into the mounting hole 21 formed on the side surface of the case 1 is provided in a protruding manner, and a cutout hole 63 is formed in a portion of one of the side pieces 61a corresponding to the holding claw. By inserting and prying a jig such as a screwdriver into the cutout hole 63, a part of the side frame 61 a can be plastically deformed so that the holding claw is inserted into the mounting hole 21. In each mounting piece 62, a long hole 64 for inserting a box screw is drilled so that the mounting frame 60 can be mounted in an embedded box such as a switch box, and a decorative plate covering the front surface of the mounting frame 60 is provided. A screw hole 65 into which the plate screw is screwed is formed so as to be attached. Further, a fitting mounting hole 66 is formed so that a well-known scissor fitting for sandwiching a wall panel or the like with the mounting frame 60 is mounted.

Second Embodiment In the first embodiment, the tilt angle between the detection surface of the thermal element 2 and the front surface of the case 1 is made variable by rotating the rotation frame 30 with respect to the case 1. However, in the present embodiment, as shown in FIG. 5 to FIG.
Is fixed at a fixed position in the case 1 and a flat lens 32 'slidable with respect to the case 1 is provided so that the detection area can be adjusted in the vertical direction. A substantially rib-shaped support rib 14 'is provided in the body 10, and a third printed circuit board 43 on which the thermal element 2 is mounted is provided in a holding groove 14a formed in a pair of peripheral walls opposed to each other in the support rib 14'. Are held at both ends. An opening window 17 is formed in the case 1 in front of the thermal element 2, and a protective cover 18 made of a material through which heat rays pass is mounted on the opening window 17. The lens 32 'is vertically slidable between the distal end surface of the support rib 14' and the inner peripheral surface of the case 1. An operation lever 32a protruding from the front surface of the case 1 is provided at the lower end of the lens 32 ', and by sliding the operation lever 32a up and down, the lens 32'
Also slide up and down. Incidentally, the lens 32 ', as shown in FIG. 8, includes a plurality of lens regions 34 _{1-34 3} in the vertical direction, a plurality of optical axes in each lens region 34 _{1-34 3} respectively left and right directions ing. Each lens region 34 _{1-34 3,} vertical inclination of the optical axis are formed differently. However, the heat rays from above the primarily in the lens area 34 ₁ front direction is focused on the heat sensitive element 2, the heat rays from the lens area 34 _2, primarily the front direction and focused on the heat sensitive element 2, a lens region
In 34 ₃ than primarily front direction for condensing heat rays from below the heat sensitive element 2. Further, by sliding the lens 32 'relative to the case 1, two lens regions 34 _{1-34 3} adapted to expose from the translucent window 17. Therefore, at the position where the lens area 34 _1, 34 ₂ corresponding to the transparent window 17, is set detection area in the front direction or upwards, at the position where the lens area 34 _2, 34 ₃ corresponding to the transparent window 17, a front The detection area is set in the direction or below. Here, three lens areas 34 ₁ are added to the lens 32 ′.
To 34 ₃ Although are provided, it is not limited thereto and may be further provided a number of lens regions. Further, the number of lens regions exposed from the light transmitting window 17 is not limited to two. The other configuration is the same as that of the first embodiment, and the description is omitted.

【The invention's effect】

As described above, according to the configuration of the first aspect, the rotary frame is provided so as to be rotatable up and down with respect to the front surface of the case, and the thermosensitive element is mounted in the rotary frame. The angle of the sensing surface with respect to the front surface of the case can be changed up and down. When the rotating frame is rotated with respect to the case, the sensing surface of the thermosensitive element forms with the front surface of the case. Since the angle changes in the vertical direction, the detection area can be changed in the vertical direction. According to the second aspect of the present invention, the thermosensitive element is disposed at a fixed position in the case, and is slidable in front of the thermosensitive element with respect to the front surface of the case, and the inclination angle of the optical axis with respect to the front surface of the case in the vertical direction is different. A lens provided with a plurality of lens regions is provided, and an opening window for transmitting heat rays is formed on the front surface of the case so as to coincide with at least one lens region. For example, the lens area exposed from the opening window of the case can be changed, and since the inclination angle of the optical axis with respect to the front surface of the case differs in the vertical direction in each lens area, the lens exposed from the opening window can be changed. The incident direction of the heat ray can be changed in the vertical direction according to the region, and as a result, the detection region can be changed in the vertical direction. As described above, since the detection area can be changed up and down, the height position can be set arbitrarily.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing Embodiment 1 of the present invention, FIG. 2 is a front view of the same with a cover removed, FIG. 3 is a sectional view of the same with the above, and FIG. 5 is a longitudinal sectional view showing Embodiment 2 of the present invention, FIG. 6 is a front view of the same with the cover removed, FIG. 7 is a sectional view of the same, and FIG. 8 is a lens used in the same. FIG. 1 ... Case, 2 ... Thermal element, 17 ... Open window, 30 ...
Rotating frame, 32 '... lens, 34 _{1 to} 34 ₃ ... lens area.

Claims (2)

(57) [Claims] 1. A device comprising: a case fixed to a wall; and a thermosensitive element for receiving a heat ray incident from the front of the case, and detecting presence or absence of a person in a detection area based on an output signal of the thermosensitive element. A rotating frame held so as to be rotatable up and down with respect to the front surface of the case, wherein the thermosensitive element is mounted in the rotating frame, and a sensing surface of the thermosensitive element is detected. A heat ray sensing type human body detection switch, wherein the angle with respect to the front surface of the case can be changed up and down. 2. A device comprising: a case fixed to a wall; and a thermosensitive element for receiving a heat ray incident from the front of the case, and detecting presence or absence of a person in a detection area based on an output signal of the thermosensitive element. The load is controlled, and the thermal element is disposed at a fixed position in the case. A plurality of the thermal elements are slidable in front of the case in front of the case and have different vertical inclination angles of the optical axis with respect to the front of the case. A lens provided with the lens area of (1), and an opening window through which heat rays are transmitted corresponding to at least one lens area is formed on the front surface of the case.