JPH0733333Y2 - Human body detection switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a human body detection switch having a heat ray sensor and capable of obtaining a detection output when an intruder is present in the detection area of the heat ray sensor.

[Prior Art] Generally, this type of human body detection switch is used, for example, to automatically turn on / off a light when a toilet is entered, or to automatically operate a ventilation fan.

In such a human body detection switch, since it is necessary to set the detection direction according to the installation location, a rotatable lever is provided with respect to the case and the detection direction of the heat ray sensor can be changed by operating this lever. Is being considered.

[Problems to be Solved by the Invention] In the above configuration, since the lever moves continuously,
There is a problem that the detection direction tends to change if the lever is touched by mistake, and there is a problem that if the detection direction changes, it is difficult to completely return to the original position.

The present invention is intended to solve the above problems, and the detection direction does not change with a slight touch, and
An object of the present invention is to provide a human body detection switch that can be relatively easily returned to its original position even if the detection direction changes.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a heat ray sensor installed in a case so as to be rotatable in one plane substantially orthogonal to the front surface of the case. A turning frame is provided, and one of the turning frame and the case is provided with a locking surface having a shape in which unevenness is continuous in the turning direction of the turning frame, and the other is provided with an elastic piece elastically contacting the locking surface. -ing

It is desirable that the rotary frame is provided with a disk-shaped rotary plate centered on the rotary center, and the case is provided with an arc-shaped rotary surface that is in sliding contact with the peripheral surface of the rotary plate. In this case, a part of the rotary surface is provided. The locking surface may be formed, and an elastic piece elastically contacting the locking surface may be provided at a key portion of the rotary plate.

Further, a locking surface may be formed at a key part of the case facing the rotating plate.

Further, the rotating surface may be provided on the rotating frame supporting member, and the engaging surface may be formed on a surface of the rotating frame supporting member different from the rotating surface.

[Operation] According to the above configuration, since the locking surface and the elastic piece are elastically contacted with each other, a click feeling is imparted when the rotating frame is rotated, and the rotating frame is rotated stepwise. Since it is held by, it has an advantage that it does not move easily even if it slightly touches the rotating frame, and there is little risk that the detection direction changes. Also, because the stopping position of the rotating frame is determined at multiple locations,
Even if the detection direction changes, it is relatively easy to return to the original position.

[Embodiment] As shown in FIGS. 1 to 4, a case 1 is formed by connecting a body 10 made of a synthetic resin molded product and a cover 20 to each other, and has a large rectangular shape of a wiring device defined in JIS standard. It has a size corresponding to three modules, and the mounting portion is formed so that it can be mounted on a metal mounting frame or a synthetic resin mounting frame defined by the industrial association standards of the wiring equipment industry association. These attachment frames are adapted to be attached to an embedded box such as a switch box. The mounting parts are formed on both sides of the cover 20, respectively.
The pair of engaging holes 21 are formed on the left and right side surfaces of the cover 20 so that they are joined by inserting the protrusions of the metal mounting frame. Four engaging claws 22 are provided at each edge so as to be joined by being inserted into holding holes formed in a synthetic resin mounting frame. One hook 23 is projectingly provided 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 fitted into the fitting hole 11 formed in the peripheral wall of the body 10 from the inside of the peripheral wall of the body 10. Then, the body 10 and the cover 20 are joined together.

The interior of the body 10 is separated by a partition rib 12 into a circuit portion storage chamber 13 and a pair of terminal storage chambers 14, and a pair of holding ribs 15 project on the inner peripheral surfaces of the left and right side walls of the circuit portion storage chamber 13. The left and right ends of the rotary frame support plate 16 are held in the grooves between the holding ribs 15. The rotary frame support plate 16 is formed in a substantially T-shape with its left and right intermediate portions protruding upward, and a step portion 16b is formed on the side edge of the vertical piece. A rotating frame supporting rib 17 is formed on the inner peripheral portion of the rear wall of the body 10 so as to face the rotating frame supporting plate 16. The upper surfaces of the rotary frame support plate 16 and the rotary frame support rib 17 are arcuate rotary surfaces 16a, 17a each having a concave central portion.
The rotary frame 30 is rotatably supported between the upper surfaces of the rotary frame support plate 16 and the rotary frame support rib 17. Body 10
A first printed circuit board 40 on which a power supply circuit unit is mounted is installed inside. The printed board 40 is provided with notches 41a and 41b for exposing the rotating surface 16a of the rotating frame supporting plate 16 and the rotating surface 17a of the rotating frame supporting rib 17, respectively. The printed circuit board 40 is placed on the partition rib 12, the step portion 16b of the rotating frame support plate 16, etc., and a space is formed between the inner bottom surface of the body 10 and the printed circuit board 40. The circuit components mounted on the substrate 40 are stored in this space. In particular, the main circuit components on the printed circuit board 40 will be installed in the portion corresponding to the circuit portion storage chamber 13. In addition, a boss 18 is provided so as to project 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 onto the boss 18. A fixing notch 43 into which the fixing screw 19 is inserted is provided on the periphery of the printed board 42.
Is formed, and a variable resistor VR having a slidable handle 72 for sensitivity adjustment is mounted on the printed circuit board 42. A variable resistor VR is provided on the periphery of the first printed circuit board 40.
A notch portion 41c is formed from which the handle 72 is projected.

A terminal 50 is stored in the terminal storage chamber 14. The terminal 50 includes a terminal plate 51 and a locking spring 52 having a spring force toward the terminal plate 51.
And a release button 53 that can press the locking spring 52 against the spring force, and has a well-known structure as a quick-connect terminal. One terminal storage chamber 14 has a pair of terminal plates 51 and a pair of locking springs 52.
And the release button 53 is arranged so as to be shared by both the locking springs 52. Each locking spring is on the bottom wall of the body 10.
A wire insertion hole (not shown) is formed corresponding to 52, and a part of the release button 53 is exposed and released by a jig such as a driver against the spring force of the locking spring 52. The button 53 can be pressed. Here, the terminal 50 is configured so that a single copper wire having a diameter of 1.6 or 2.0 for general house wiring can be connected thereto. A connection piece 54 is provided at one place of the terminal board 51 so as to project upward, and the connection piece 54 is formed on the printed circuit board.
The terminal 50 and the circuit section on the printed circuit board 40 are electrically connected to each other by being soldered and fixed to the circuit board 40.

The rotating frame 30 is formed in a disk shape and is formed in a frame shape in which a pair of rotating plates 31a and 31b facing each other apart from each other are connected by a pair of parallel side frames 32, and a pyroelectric sensor as a heat ray sensor. A third printed circuit board 44 on which the element P and its peripheral circuit section are mounted is mounted. The rotating plates 31a, 31b are the above-mentioned rotating surfaces 16a, 1
By being mounted on the 7a, the rotating frame 30 can rotate with respect to the body 10. Printed circuit board 44
A fixing notch 45 is formed on one side, and a fixing projection 46 is provided on one side opposite to this side. A boss 33 corresponding to the fixing notch 31a is formed on one rotary plate 31a of the rotary frame 30 along the inner side surface, and the other rotary plate 31a is formed.
A support hole 34 into which the fixing projection 46 is fitted is formed in b.
Therefore, the printed circuit board 44 is fixed to the rotating frame 30 by fitting the fixing protrusion 46 into the support hole 34 and screwing the fixing screw 35, which is a tapping screw, into the boss 33 through the fixing notch 45. Is done. A handle 36, which is operated when adjusting the angle of the rotating frame 30 with respect to the body 10, is provided on the peripheral surface of the one rotating plate 31a. Also, the rotating plate 31b
A stopper 37 that restricts the rotation range of the rotation frame 30 by coming into contact with the inner peripheral surface of the cover 20 is provided on the outer surface of the.

The printed boards 40, 42, 44 described above are connected to each other via a jumper wire 47. A jumper wire 47 connecting the first printed circuit board 40 and the second printed circuit board 42 in the body 10 and the third printed circuit board 44 in the rotating frame 30 is provided in the cutout portion 41a formed in the printed circuit board 40. It is supposed to be inserted. Further, the jumper wire 47 connecting the printed circuit board 44 in the rotating frame 30 and the other printed circuit boards 40, 42 is the rotating frame 3
It is set to have a margin larger than the rotatable length of the rotating frame 30 so that the 0 does not break when it rotates. An insulating sheet 48 is provided on the upper surface of the printed board 40 so as not to short-circuit with the circuit portion of the printed board 44.

By the way, the pyroelectric element P mounted on the printed circuit board 44 is
It is arranged between the both side frames 32 so that the upper surface side in FIG. 1 becomes a detection surface, and a lens plate 60 for setting a detection area is arranged in front of the detection surface of the pyroelectric element P. It The lens plate 60 is a flat-plate Fresnel lens formed of a material that transmits far infrared rays such as high-density polyethylene, and is formed in a rectangular shape, and a pair of engaging hooks 61 are projectingly provided on both side edges. . The lens plate 60 is a rotary plate 31a, 31b of the rotary frame 30.
The lens plate 60 is provided on the support rib 39 formed along the periphery of the
The engaging hook 61 is engaged with the engaging recess 38 formed in the lower portion of the inner peripheral surface of the both side frames 32 of the rotating frame 30 by placing the peripheral portion of the rotating frame 30 in a curved shape like a semi-cylindrical shape. It is adapted to be held by the rotating frame 30. The lens plate 60 is composed of a plurality of areas so as to form a desired detection area. It goes without saying that the focus for each area is set on the detection surface of the pyroelectric element P.

On the upper surface of the cover 20, a pair of rotary frame holding plates 24a and 24b that respectively hold the rotary plates 31a and 31b of the rotary frame 30 are provided in a protruding manner. The rotary frame holding plates 24a, 24b each have a peripheral wall, and the rotary plates 31a, 31b rotate along the inner peripheral surface of the peripheral wall. That is, the rotary plates 31a and 31b are sandwiched between the inner peripheral surfaces of the peripheral walls of the rotary frame holding plates 24a and 24b and the rotary surfaces 16a and 17a of the rotary frame support plate 16 and the rotary frame holding ribs 17. It turns in a curved shape. The rotation range of the rotation frame 30 is regulated by the stopper 37 coming into contact with the inner peripheral surface of the cover 20 as described above, and the range is set to about 40 ° to the left and right. In addition, the detection area when the rotating frame 30 is fixed is approximately 90.
The rotation angle of the rotation frame 30 allows the detection area to be adjusted within a range of 170 degrees. On the front surface of the cover 20, a handle insertion hole 25 through which a handle 71 for operating a switch SW for mode switching such as detection operation, always-on, and always-off is exposed in a portion different from the rotating frame holding plates 24a, 24b. A light receiving hole 26 through which the light receiving element PD is exposed and a display hole 27 through which the display element LD including a light emitting diode is exposed are formed. A name plate 28 is arranged in a portion extending over the handle insertion hole 25, the light receiving hole 26, and the display hole 27. Here is the nameplate 28
Has a through hole 28a at a portion corresponding to the handle insertion hole 25, and has 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 the handle 72 of the variable resistor VR is exposed is formed in the center of one side surface of the cover 20. This part is Case 1
When the JIS is attached to the mounting frame and the JIS standard flash plate is arranged on the front side of the case 1, it is a part that is covered by the flash plate so that no one other than the installer touches the handle 72 by mistake. I am doing it.

A lens cover made of a synthetic resin molded product that is transparent to far infrared rays is provided between the rotating frame holding plates 24a and 24b in the cover 20.
64 is installed. The lens cover 64 is formed in a semi-cylindrical shape, and a pair of locking pieces 65 is projectingly provided on both side edges thereof. As shown in FIG. 5, 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. The lens cover 64 is arranged so as to be substantially in close contact with the outer surface of the lens plate 60. Lens cover 62
Since it suffices to transmit infrared rays, it can be formed of a material that is opaque to visible light. By covering the rotary frame 30 with this lens cover 62,
It is possible to prevent the circuit portion in the rotating frame 30 from being seen from the outside and prevent the user from feeling psychologically uneasy.

By the way, as shown in FIG. 6, the rotation surface 17a of the rotary frame holding rib 17 is provided with a locking surface 75 having a shape in which unevenness is continuous in the circumferential direction of the rotation surface 17a. Further, the rotating plate 31a of the rotating frame 30 has an elastic piece having elasticity in a direction substantially orthogonal to the rotating surface 17a (the arrow direction in FIG. 6A).
76 is projected. The elastic piece 76 is formed in a fan shape, and its both side surfaces act as stoppers that regulate the rotation angle of the rotation frame 30. The elastic piece 76 is in elastic contact with the locking surface 75, and has a locking projection 77 that engages with one of the locking surfaces 75 in a concave manner. Therefore, when the rotating frame 30 rotates, the locking projection 77 is locked by the locking surface 75.
By engaging with any one of the recesses, the rotation of the rotation frame 30 is gradually performed, and a click feeling is given.

In order to give a click feeling to the rotation of the rotating frame 30, as shown in FIG. 7, the portion of the cover 20 facing the rotating plate 31a is continuously concavo-convex as shown in FIG. 7 (c). A locking surface 75 having a shape is formed, an elastic piece 76 as shown in FIG. 7B is formed on the rotary plate 31a, and a locking projection 77 is projected on a portion of the elastic piece 76 facing the locking surface 75. The structure provided may be sufficient. According to this structure, the elastic piece 76 has elasticity in the direction of the arrow in FIG. 7A, and the locking projection 77 engages with one recess of the locking surface 75, so that the rotary frame 30 is stepped. It rotates in a mechanical manner. Further, as shown in FIG.
Is provided on a surface different from the rotating surface 17a, an elastic piece 76 equivalent to that of the embodiment of FIG. 7 is provided, and a locking projection 77 is provided at a portion of the tip end of the elastic piece 76 facing the rotary frame holding rib 17. You may make it project. The locking surface 76 may have the same shape as that of the embodiment shown in FIG. In any of the configurations shown in FIGS. 6 to 8, the click feeling can be given to the rotary frame 30, but the rotary frame holding rib 17 may be replaced with the rotary frame support plate 16. Also, the same operation can be performed by forming a locking surface on the rotating frame 30 and forming an elastic piece on the cover 20 side.

[Advantage of the Invention] As described above, the present invention has a rotating frame mounted on the case so as to be rotatable in one plane substantially orthogonal to the front surface of the case, and in which the heat ray sensor is installed. One of the rotating frame and the case is provided with a locking surface having a shape in which unevenness is continuous in the rotating direction of the rotating frame, and the other is provided with an elastic piece elastically contacting the locking surface. By the elastic contact between the stop surface and the elastic piece, a click feeling is imparted when the rotating frame is rotated, and the rotating frame is rotated in stages. It has the advantage that it does not move easily with a slight touch, and there is little danger of the detection direction changing. Also, because the stopping position of the rotating frame is determined at multiple locations,
Even if the detection direction changes, there is an advantage that it is relatively easy to return to the original position.

In order to realize the elastic piece and the locking surface described above, a disk-shaped rotating plate having a rotation center as a center is provided on the rotating frame, and an arc-shaped rotating surface that slidably contacts the peripheral surface of the rotating plate is provided on the case. The locking surface may be formed on a part of the rotating surface, and an elastic piece elastically contacting the locking surface may be provided at a key portion of the rotating plate.

Further, a locking surface may be formed at a key part of the case facing the rotating plate.

Further, the rotating surface may be provided on the rotating frame supporting member, and the engaging surface may be formed on a surface of the rotating frame supporting member different from the rotating surface.

[Brief description of drawings]

1 is an exploded perspective view showing an 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 horizontal sectional view of the same, and FIG. 6 (a) and 6 (b) are side cross-sectional views and a front view of relevant portions, respectively, and FIGS. 7 (a), (b), and (c) are cross-sectional views of the rotating frame of FIG. FIG. 8A and FIG. 8B are main part side views of another embodiment of the same as above, perspective views of elastic pieces, perspective views of locking surfaces, and FIG. It is a perspective view of an elastic piece. 1 ... Case, 16 ... Rotating frame support plate, 16a ... Rotating surface, 1
7 ... Rotating frame holding rib, 17a ... Rotating surface, 30 ... Rotating frame,
75: Locking surface, 76: Elastic piece, P: Pyroelectric element.

Claims (4)

[Scope of utility model registration request] 1. A human body detection switch which has a heat ray sensor inside a case and obtains a detection output when an intruder in the detection area of the heat ray sensor formed in front of the case is detected, and is substantially orthogonal to the front surface of the case. The rotating frame is mounted on the case so as to be rotatable in one plane, and the heat ray sensor is installed in the rotating frame. One of the rotating frame and the case rotates the rotating frame. A human body detection switch including a locking surface having a shape in which unevenness is continuous in the direction, and an elastic piece elastically contacting the locking surface is provided on the other side. 2. A rotating frame has a disk-shaped rotating plate having a center of rotation as a center, and an arc-shaped rotating surface which is in sliding contact with the peripheral surface of the rotating plate is formed in the case, and a part of the rotating surface is formed. The locking surface is formed,
2. The human body detection switch according to claim 1, wherein an elastic piece elastically contacting the locking surface is provided in a protruding manner at a key portion of the rotary plate. 3. The rotating frame has a disk-shaped rotating plate having a center of rotation as a center, and a locking surface is formed at a key portion of the case facing the rotating plate, and a lock surface is provided at a key portion of the rotating plate. The human body detection switch according to claim 1, wherein an elastic piece elastically contacting the locking surface is provided in a protruding manner. 4. A rotary frame has a disk-shaped rotary plate centering on a rotary center, and a case is provided with a rotary frame support member having an arc-shaped rotary surface that is in sliding contact with the peripheral surface of the rotary plate. And a locking surface is formed on a surface different from the rotation surface in the rotating frame support member,
2. The human body detection switch according to claim 1, wherein an elastic piece elastically contacting the locking surface is provided in a protruding manner at a key portion of the rotary plate.