JPH03194820A - Heat sensitizing human body detecting switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention has a heat-sensitive element built into a case that detects heat rays generated from the human body, and the load is controlled by determining the presence or absence of a person within the detection area based on the output signal of the heat-sensitive element. This relates to a human body detection switch.

[Conventional technology]

BACKGROUND ART Conventionally, this type of thermal human body detection switch has been used for purposes such as automatically turning on and off lights depending on the presence or absence of a person in a room. In a wall-mounted thermal human body detection switch, the thermal element is housed in a rotating frame that can be rotated left and right with respect to the case.
There is a device in which the detection area can be changed to the left or right, and the detection area can be set according to the installation location.

[Problem to be solved by the invention]

In the conventional configuration described above, since the detection area is adjusted to the left and right, the height at which the thermal human body detection switch can be installed is limited, and it may not be possible to use it depending on the installation location. was there. The present invention aims to solve the above problems. Therefore, the present invention aims to provide a thermal human body detection switch in which the detection area can be adjusted up and down, so that the installation height is not limited.

[Means for Solving the Problems] In order to achieve the above object, configuration 1 of claim 1 provides a rotating frame that is held vertically rotatable with respect to the front surface of the case, The heat sensitive element is housed within the rotating frame, and the angle of the sensing surface of the heat sensitive element with respect to the front of the case can be varied up and down. A lens is placed in a fixed position inside the case, and in front of the heat-sensitive element, a lens is provided that is slidable against the front of the case and has multiple lens areas with different vertical inclination angles of the optical axis relative to the front of the case. In addition, an opening window is formed on the front surface of the case to coincide with at least one lens area and to transmit heat rays. [Function] In the structure of claim 1, the rotating frame is rotated with respect to the case. In this case, since the angle that the sensing surface of the heat-sensitive element makes with respect to the front surface of the case changes in the vertical direction, the sensing area can be changed vertically. By doing so, you can change the lens area that is exposed through the opening window of the case, and since each lens area has a different angle of inclination of the optical axis with respect to the front of the case in the vertical direction, it is possible to change the lens area that is exposed through the opening window of the case. The direction of incidence of heat rays can be changed vertically depending on the lens area.
As a result, the detection area can be changed vertically.

Embodiment 1 As shown in FIGS. 1 to 3, a case 1 is made of a synthetic resin molded product and is formed by combining a body 10 and a cover 20. As shown in FIGS. Case 1 is three times the dimensions (referred to as unit dimensions) of wiring devices that can attach up to three large rectangular devices to the mounting frame 60, which is standardized by JIS standards and the Japan Wiring Appliances Industry Association. are formed with corresponding dimensions. Therefore, only one case 1 can be attached to a mounting frame for three large squares. The case l has a mounting hole 21 that engages with the holding claw of the metal mounting frame and a mounting claw 22 that engages with the holding hole of the synthetic resin mounting frame as a mounting part for the mounting frame 60, respectively. It is formed on both sides of 20. On the back surface of the cover 20, connecting legs 23 with connecting claws 23a at the tips thereof are protruded at three locations, and each connecting leg 23 is inserted into a connecting hole 11 drilled in the circumference of the body 10 to form a connecting claw. 23a is locked to the periphery of the coupling hole 11, so that the cover 2 is attached to the body 10.
0 is combined. Inside the body 10, there are a circuit storage chamber 12 and a terminal storage chamber 13.
is formed. In addition, a pair of right and left support ribs 14 with arched end surfaces protrude from the bottom of the body 1°.A first printed circuit board 41 on which a power supply circuit is mounted is located in the zero circuit storage chamber 12. A second printed circuit board 42 on which a variable resistor VR and the like are mounted is mounted. Terminal storage chamber 13
A terminal 50 consisting of a connecting terminal is housed in the terminal. The terminal 50 includes a locking spring 51, a terminal plate 52, and a release button 53, and includes a wire insertion hole 15 drilled in the bottom of the body 10.
The inserted electric wire is held by being held between the locking spring 51 and the terminal plate 52 by the spring force of the locking spring 51. In addition, by inserting a jig such as a screwdriver into the button operation hole 16 bored in the bottom of the body 10 and operating the release button 53, the lock spring 51 is bent and the lock spring 51 is removed from the terminal board 52. so that the wire can be easily removed. 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.
is curved in an arcuate cross-section along the periphery of the end plate 31. Further, between both end plates 31, a third printed circuit board 43 is held, which is equipped with a heat-sensitive element 2 made of a pyroelectric element and a signal processing circuit that determines the presence or absence of a person based on the output of the heat-sensitive element 2. There is. At the end of each end plate 31 opposite to the lens 32, a rotation protrusion 33 having an arcuate peripheral surface is protruded.The zero rotation protrusion 33 is placed on the support rib 14. There is a rotary protrusion 3 on the tip surface of the support rib 14.
3 are in sliding contact with each other, the rotating frame 30 is held so as to be freely rotatable in the vertical direction. The lens 32 is made of a material such as high-density polyethylene so that heat rays can easily pass therethrough, and has a plurality of focal points to divide the detection area of the heat-sensitive element 2 into a plurality of areas. In other words, the pyroelectric element that is the heat-sensitive element 2 is a differential type sensor, and an output signal can only be obtained when the amount of incident heat ray changes. Therefore, the detection area of the heat-sensitive element 2 is divided into multiple small areas. By dividing it, the slightest movement of a person can be detected, and the output can be obtained continuously. 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 that the detection surface of the heat-sensitive element 2 makes with respect to the front surface of the case 1 can be changed up and down. As a result, the detection area can be adjusted in the vertical direction. At the front of the case 1, the mode selection switch SW, the light receiving element PD, the display element LD, the knob of the variable resistor VR, etc. are exposed. The mode selection switch SW is a switch that can select an automatic mode in which the load is automatically controlled based on the output of the thermal element 2, an on mode in which the load is forcibly turned on, and an off mode in which the load is forcibly turned off. It is. Further, the light receiving element PD detects the ambient illuminance, and the 0 display element LD, which prevents automatic load control from being performed when the surroundings are bright, blinks in response to on/off of the load. Further, the variable resistor VR mounted on the second printed circuit board 42 sets the time period during which the load is kept on after the heat ray is detected by the heat sensitive element 2. By the way, during construction on a wall surface or the like, the case 1 is attached to a mounting frame 60 for a wiring device. For example, as shown in FIG. 4, the metal mounting frame 60 has a pair of sides 61a,
61b is formed into a frame shape with both ends connected by mounting pieces 62, and each side piece 61a, 61b has a holding claw (
(not shown) is provided protrudingly, and a notch hole 63 is bored in a portion of one side piece 61a corresponding to the holding claw.
By inserting and prying a jig such as a screwdriver into 3, a part of the side frame 61a can be plastically deformed so that the holding claws can be inserted into the mounting holes 21. Each mounting piece 62 is provided with a long hole 64 into which a box screw is inserted so that the mounting frame 60 can be attached to an embedded box such as a switch box, and a decorative plate is provided to cover the front surface of the mounting frame 60. For attachment, a screw hole 65 into which a plate screw is screwed is formed. Further, a metal fitting mounting hole 66 is bored so that a well-known scissor metal fitting for holding a wall panel or the like between the mounting frame 60 and the mounting frame 60 can be attached.

[Example 2] In Example 1, by rotating the rotating frame 30 with respect to the case 1, the inclination angle between the sensing surface of the heat-sensitive element 2 and the front surface of the case 1 was made variable. However, in this embodiment, as shown in FIGS. 5 to 7, the thermal element 2
By fixing the lens in a fixed position in the case 1 and providing a flat lens 32' that can freely slide with respect to the case 1,
The detection area is adjusted in the vertical direction. A substantially mouth-shaped support rib 14' is provided in the body 10,
Both ends of the third printed circuit board 43 on which the thermal element 2 is mounted are held in holding grooves 14a formed in a pair of opposing peripheral walls of the support rib 14'. An opening window 17 is formed in the case 1 in front of the heat-sensitive element 2.
7 has a protective cover 18 made of a material that transmits heat rays.
A lens 32' is held between the distal end surface of the support rib 14' and the inner circumferential surface of the case 1 so as to be slidable in the vertical direction. At the lower end of the lens 32' is an operating lever 32 that protrudes from the front of the case l.
a is provided, and by sliding the operating lever 32a up and down, the lens 32' also slides up and down. By the way, as shown in FIG. 8, the lens 32' includes a plurality of lens regions 341 to 34 in the vertical direction,
Each lens area 34. ~34. each has a plurality of optical axes in the left and right directions. Each of the lens regions 341 to 34 is formed so that the vertical inclination of the optical axis is different. However, the lens area 34. In the lens area 342, heat rays mainly from above are focused on the heat sensitive element 2 rather than in the front direction, and in the lens area 342, heat rays mainly from the front direction are focused on the heat sensitive element 2.
．． In this case, heat rays mainly from below are focused on the heat-sensitive element 2 rather than from the front direction. Further, when the lens 32' is slid with respect to the case 1, two lens regions 341 to 34 degrees are exposed through the transparent window 17. Therefore, in the position where the lens areas 341 and 342 correspond to the light-transmitting window 17, the detection area is set in the front direction or above, and in the position where the lens areas 342 and 343 correspond to the light-transmitting window 17, the detection area is set in the front direction or downward. The detection area is set. Here, although the lens 32' is provided with three lens regions 341 to 34, the present invention is not limited to this, and a larger number of lens regions may be provided. Furthermore, the number of lens regions exposed through the transparent window 17 is not limited to two either. The other configurations are the same as those in the first embodiment, so their explanation will be omitted.

【Effect of the invention】

As described above, in the structure of claim 1, a rotating frame is provided which is held so as to be able to freely rotate up and down with respect to the front surface of the case, and the heat-sensitive element is placed in a bag within the rotating frame. The angle of the detection surface of the heat-sensitive element relative to the front of the case can be varied up and down, and by rotating the rotating frame relative to the case, the detection surface of the heat-sensitive element can be adjusted relative to the front of the case. Since the angle changes vertically, the detection area can be changed vertically. In the structure of claim 2, the heat-sensitive element is fixed in the case. A lens is disposed in front of the heat-sensitive element and has a plurality of lens regions that are slidable relative to the front surface of the case and have different angles of vertical inclination of the optical axis relative to the front surface of the case. An aperture window is formed on the front surface of the case that corresponds to at least one lens area and transmits heat rays, and when the lens is slid against the case,
The lens area exposed from the opening window of the case can be changed, and since each lens area has a different angle of inclination of the optical axis with respect to the front of the case in the vertical direction, the lens area exposed from the opening window can be changed. The incident direction of the heat rays can be changed vertically accordingly, and as a result,
The detection area can be changed vertically. As described above, since the detection area can be changed vertically, the height position can be set arbitrarily. .

[Brief explanation of 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 the cover removed, Fig. 3 is a sectional view of the same, and Fig. 4 is a state in which the above is attached to a mounting frame. 5 is a longitudinal sectional view showing the implementation g42 of the present invention, FIG. 6 is a front view with the cover removed, FIG. 7 is a sectional view of the same, and FIG. 8 is a lens used in the same. FIG. DESCRIPTION OF SYMBOLS 1... Case, 2... Heat sensitive element, 17... Opening window, 30... Rotating frame, 32'... Lens, 341-3
4. ...lens area.

Claims (2)

[Claims] (1) Equipped with a case fixed to a wall surface and a heat-sensitive element that receives heat rays incident from the front of the case, the load is reduced by detecting the presence or absence of a person within the detection area based on the output signal of the heat-sensitive element. The thermal human body detection switch to be controlled is equipped with a rotating frame that is held so as to be able to rotate up and down with respect to the front of the case, and the above-mentioned heat-sensitive element is housed within the rotating frame. A thermal human body detection switch characterized in that the angle of the detection surface relative to the front of the case is variable up and down. (2) Equipped with a case fixed to a wall surface and a heat-sensitive element that receives heat rays incident from the front of the case, the load is reduced by detecting the presence or absence of a person within the detection area based on the output signal of the heat-sensitive element. In the heat-sensitive human body detection switch to be controlled, the heat-sensitive element is arranged at a fixed position within the case, and the front of the heat-sensitive element is slidable against the front of the case, and the optical axis is tilted in the vertical direction with respect to the front of the case. A thermal human body detection device characterized in that a lens is provided with a plurality of lens areas having different angles, and an opening window is formed on the front surface of the case to coincide with at least one lens area and transmit heat rays. switch.