JP2010027398A - Automatic switch with heat ray sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic switch with heat ray sensor can prevent breakage of a locking member to joint a decorative plate and a body. <P>SOLUTION: The automatic switch with heat-ray sensor is provided with a heat ray sensor TP, a relay SW, and a lens block 3 which houses the heat ray sensor TP and has a condensing lens 30 to condense heat rays from a detection range to a light receiving part of the heat ray sensor TP, and a housing A which has a window hole 11c to expose the condensing lens 30 and supports the lens block 3 rotatably so as to change the detection range. The housing A is arranged embedded in a ceiling and the housing A has a flange part 11 of which rear face is in contact with the front surface of a building material, and a decorative plate 5 to cover its front face is installed in the flange part 11, and a locking hole 11d is installed in the flange part 11 and a locking pawl 51 to be locked with the locking hole 11d is installed in the decorative plate 5. Ribs 11e, 52 which regulate mutual rotation are respectively provided at the outer periphery fringe of the flange part 11 and the inner periphery fringe of the decorative plate 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automatic switch with a heat ray sensor that detects the presence or absence of a person by detecting a heat ray emitted from a human body and controls a load.

  2. Description of the Related Art Conventionally, there is provided an automatic switch with a heat ray sensor that includes a heat ray sensor that detects the presence or absence of a person by detecting a heat ray radiated from a human body and controls a load according to the output of the heat ray sensor. This type of automatic switch with a heat ray sensor is used for control such that, for example, when the load is illumination, the illumination is turned on when a person enters the room and the illumination is turned off when the person leaves the room.

  A conventional example of this type of automatic switch with a heat ray sensor will be described below with reference to the drawings. However, in the following description, the top and bottom in FIG. This conventional example is attached to the ceiling, and as shown in FIG. 4, the flange 11 and the center of the rear surface of the flange 11 contact the lower surface of the peripheral portion of the mounting hole (not shown) formed on the ceiling. A housing A including a body 1 having a cylindrical portion 10 projecting from a portion and a cover 2 having a bottomed cylindrical shape with an open front surface and being closed by being coupled to the cylindrical portion 10. . Four assembly pieces 10a project from the rear end of the cylindrical portion 10, and an assembly protrusion 20 projecting from the outer peripheral surface of the front end portion of the cover 2 is engaged with an assembly hole 10b penetrating the assembly piece 10a. By doing so, the body 1 and the cover 2 are coupled.

  In the housing A, for example, a spherical lens block 100 in which a heat ray sensor TP composed of an infrared detection element such as a pyroelectric element is housed, and a relay SW that is turned on / off according to the output of the heat ray sensor TP are mounted. 1 printed wiring board P1, a changeover switch (not shown) for setting the operation of the relay SW, a variable resistor (not shown) for setting the sensitivity of the heat ray sensor TP, etc. are manually operated. A second printed wiring board P2 on which an element having a handle is mounted is accommodated. Here, the second printed wiring board P2 is fixed on the rear side of the lens block 100 with the mounting surface facing forward, and the handle can be operated from the front of the body 1. The first printed wiring board P1 is fixed on the rear side of the second printed wiring board P2 with the mounting surface facing rearward.

  On the first printed wiring board P1, in addition to the relay SW, three terminal portions 6 for connecting the relay SW and an electric wire (not shown) are mounted. The terminal portion 6 is a so-called quick connection terminal, and is provided on the cover 2 and two terminal plates 60 which are mounted on the first printed wiring board P1 adjacent to each other and electrically connected to the relay SW. Two locking springs 61 for locking the electric wires inserted through the electric wire insertion holes 21 between the terminal plate 60 and a jig such as a minus driver inserted from the release hole 22 provided in the cover 2. And a release button 62 for releasing the lock by simultaneously pressing the two lock springs 61 when pressed. If one of the terminal portions 6 is connected to a power source side electric wire and the other one terminal portion 6 is connected to a load side electric wire, power supply from the power source to the load is performed by the relay SW. Can be turned on / off. The remaining one terminal portion 6 is connected to a conventionally known heat ray sensor slave (not shown).

  The lens block 100 includes a substantially hemispherical condensing lens 101 that condenses heat rays from the detection range on the light receiving surface of the heat ray sensor TP, a substrate P3 on which the heat ray sensor TP is mounted, and a substrate P3 attached to the inside. The rotary frame 102 is formed in a substantially hemispherical shape that is coupled to the condenser lens 30 to form a spherical shape, and a substantially annular holding frame 103 that covers a coupling portion between the condenser lens 101 and the rotary frame 102. A window hole (not shown) that communicates with the cylinder portion 10 and exposes the condenser lens 101 is provided in the center portion of the flange portion 11 in the front-rear direction. Further, on the rear side of the lens block 100, an intermediate portion of the holding metal fitting 110 whose both ends are screwed to the flange portion 11 with mounting screws 111 is located. A coil spring 112 that biases the lens block 100 in a direction of pressing the lens block 100 against the flange portion 11 is inserted between the presser fitting 110 and the lens block 100. Furthermore, a substantially cylindrical shaft portion 102a protrudes from two locations across the opening on the outer surface of the rotating frame 102, and the shaft portion 102a is formed at two locations across the window hole on the rear surface of the flange portion 11. By being housed in a recess (not shown) communicating with the window hole, the lens block 100 is rotatable about the shaft portion 102a. Thus, the detection range can be changed by rotating the lens block 100 and changing the direction of the condenser lens 101.

  Further, on both sides of the cylinder portion 10 on the rear surface of the flange portion 11, a clamp 7 for fixing the housing A with the ceiling construction material sandwiched between the flange portion 11 is attached. The sandwiching bracket 7 has a substantially rectangular parallelepiped shape whose one side face is opposed to the cylinder part 10 in the front-rear direction, and has a guide part 70 whose one side face away from the cylinder part 10 is opened, A tightening screw 71 penetrating both ends in the longitudinal direction, and a pinching piece 72 that is partly housed in the guide portion 70 and screwed into the tightening screw 71 inside the guide portion 70 are provided.

  A notch 70 a communicating with the opening is provided at the rear end of one side surface adjacent to the opening surface of the guide portion 70. The clip piece 72 can be inserted into the notch 70a when the clip piece 72 is located at the rear end of the guide portion 70, and when the tightening screw 71 is rotated from the state in which the clip piece 72 is inserted into the cutout 70a, The sandwich piece 72 comes out of the notch 70 a and moves forward along the opening surface of the guide portion 70. The tightening screw 71 can be rotated by inserting a driver through a through hole 11a provided in the flange portion 11, and the tightening screw 71 is in a state where the rear surface of the flange portion 11 is in contact with the ceiling surface. When 71 is rotated, the pinching piece 72 moves out of the notch 70 a and moves in a direction approaching the flange portion 11, and the ceiling construction material can be pinched between the pinching piece 72 and the flange portion 11.

  In addition, in the vicinity of the portion to which the clamp member 7 of the flange portion 11 is attached, a screw for directly attaching the flange portion 11 to the ceiling or an embedding box (not shown) embedded in the ceiling surface. A screw insertion hole 11b is inserted through the screw to be coupled. Further, the decorative plate 5 that covers the flange portion 11 is attached to the housing A between the ceiling surface and the appearance is improved by covering the screw insertion hole 11b of the flange portion 11 and the like. The decorative plate 5 has a through hole 50 through which the lens block 100 is exposed.

In addition, four locking pieces projecting rearward are provided on the rear surface of the decorative plate 5, and four locking holes for locking the locking pieces are provided in the flange portion 11 so as to engage the locking pieces. Patent Document 1 discloses an automatic switch with a heat ray sensor that can easily couple the decorative plate 5 and the body 1 by being locked in a blind hole.
JP 2005-135613 A

  However, in the conventional example described in Patent Document 1, when the decorative plate 5 is subjected to stress in the direction in which the decorative plate 5 rotates in a state where the decorative plate 5 and the body 1 are coupled, the rotation of the decorative plate 5 is performed. Since there is no means for restricting the movement, stress is applied to the locking piece as the decorative plate 5 rotates, and the locking piece may be damaged.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an automatic switch with a heat ray sensor that can prevent a locking piece that connects a decorative plate and a body from being damaged.

  In order to achieve the above object, a first aspect of the present invention provides a heat ray sensor for detecting a heat ray emitted from a human body, a relay for turning on / off a power supply from a power source according to an output of the heat ray sensor, and a heat ray sensor. And a lens block that has a condensing lens that condenses the heat rays from the detection range on the light receiving part of the heat ray sensor and a window block that exposes the condensing lens, and rotates the lens block to change the detection range. An automatic switch with a heat ray sensor embedded in a ceiling surface, the housing having a flange portion whose rear surface abuts against the surface of the construction material, Is provided with a decorative plate that covers the front surface thereof, a locking hole is provided in the flange portion, and a locking claw that locks the decorative plate in the locking hole is provided. The inner peripheral edge of 粧 plate, characterized in that respectively one or a plurality of ribs for restricting the mutual rotation.

  The invention of claim 2 is characterized in that, in the invention of claim 1, an auxiliary rib that represents the outer shape of the flange portion is provided on the surface of the decorative plate that faces the flange portion.

  According to the first aspect of the present invention, in the state where the decorative plate is attached to the flange portion, any rotation can be restricted by the rib, so that the locking piece is prevented from being stressed with the rotation. Therefore, it is possible to prevent the locking piece connecting the decorative plate and the body from being damaged.

  According to the second aspect of the present invention, when attaching the decorative plate to the flange portion, the auxiliary rib is shaped like the outer shape of the flange portion, so that the flange portion can be intuitively matched with the decorative plate, and therefore when assembled. The workability can be improved.

  Embodiments of an automatic switch with a heat ray sensor according to the present invention will be described below with reference to the drawings. However, since the basic configuration of the present embodiment is almost the same as that of the conventional example, components having the same function are denoted by the same reference numerals and description thereof is omitted even if there is a slight difference in shape. In the following description, the vertical direction is defined as the front-rear direction in FIG. 2 (b), but in the actual usage state embedded in the ceiling, the front (upper in FIG. 2 (b)) is the lower and the rear ( The lower part in FIG. 2B is the upper part. In the present embodiment, as shown in FIGS. 1A and 1B, ribs 52 and 11 e that restrict the rotation of the inner peripheral edge of the rear surface of the decorative plate 5 and the outer peripheral edge of the flange portion 11 of the body 1, respectively. There is a feature in having provided.

  In the present embodiment, as shown in FIG. 2B, instead of the lens block 100 of the conventional example, the condenser lens 30, the substrate P3 on which the heat ray sensor TP is mounted, the rear surface is opened, and the front end The first frame 31 having the condensing lens 30 disposed in the opening formed in the portion and the opening surfaces of the second frame 32 having the front surface opened and the substrate P3 fixed thereto are coupled to each other. A lens block 3 composed of a rotating frame is used. Further, in place of the conventional holding metal fitting 110 and coil spring 112, a substantially annular spring member 4 that urges the lens block 3 toward the window hole 11c provided in the flange portion 11 is used. The terminal portion 6 is covered with a substantially rectangular parallelepiped terminal cover 63.

  On the rear surface of the decorative plate 5, as shown in FIG. 3A, locking pieces 51 that protrude backward are formed at the positions of the apexes of a substantially square centered on the substantially central portion. Further, a pair of substantially rectangular ribs 52 project inwardly on the inner peripheral edges on both sides (left and right in the figure) across the through hole 50. Between these ribs 52, a substantially arc-shaped auxiliary rib 53 is provided along the inner periphery except for the both sides with the through hole 50 interposed therebetween. Further, a substantially rectangular fitting into which a jig such as a flat-blade screwdriver is inserted in order to remove the decorative plate 5 from the flange portion 11 is provided on the inner peripheral edge of one side (left side in the figure) across the through hole 50. A mating recess 54 is provided.

  As shown in FIG. 3 (b), a substantially rectangular locking hole 11 d is formed through the front surface of the flange portion 11 at a position facing the locking piece 51 when the decorative plate 5 is attached. Further, a substantially rectangular rib 11e positioned between each pair of ribs 52 of the decorative plate 5 in a state where the decorative plate 5 is attached is integrally formed on the outer peripheral edge of the flange portion 11 so as to protrude outward. Has been. Furthermore, a substantially rectangular fitting protrusion 11f that fits into the fitting recess 54 of the decorative plate 5 is integrally formed on the rib 11e on one side (right side in the figure) so as to protrude outward. Yes. The fitting protrusion 11f abuts against the tip of the jig when a forward force is applied to the decorative plate 5 with the jig inserted into the fitting recess 54, and the ceiling surface is damaged by the tip of the jig. It is for prevention.

  Thus, when the decorative plate 5 is attached to the flange portion 11 (see FIG. 2A) and the decorative plate 5 is subjected to stress in the direction of rotation, the rib 52 and the flange of the decorative plate 5 are provided. Since the mutual rotation is regulated by the contact with the rib 11e of the portion 11, it is possible to prevent the locking piece 51 from being stressed with the rotation, and thus the locking piece 51 is prevented from being damaged. Can be prevented.

  In the present embodiment, as shown in FIG. 3A, the portion surrounded by the auxiliary rib 53 of the decorative plate 5 represents the outer shape of the flange portion 11 in a plan view. When the plate 5 is attached, the flange portion 11 can be intuitively matched with the decorative plate 5, and therefore the workability during assembly can be improved. Moreover, since the fitting recessed part 54 and the fitting protrusion 11f which mutually fit are provided in the decorative plate 5 and the flange part 11, respectively, the decorative plate 5 can be matched with the flange part 11 more intuitively.

It is a figure which shows embodiment of the automatic switch with a heat ray sensor which concerns on this invention, (a) is a rear view of a decorative plate, (b) is a principal part enlarged view of the state which attached the decorative plate to the flange part. (A) is the whole perspective view same as the above, (b) is an exploded perspective view same as the above. It is principal part explanatory drawing same as the above, (a) is a rear view of a decorative plate, (b) is a front view of a flange part. It is a disassembled perspective view which shows the conventional automatic switch with a heat ray sensor.

Explanation of symbols

11 Flange 11d Locking hole 11e Rib 5 Decorative plate 51 Locking piece 52 Rib

Claims (2)

  A heat ray sensor that detects the heat rays emitted from the human body, a relay that turns on / off the power supply from the power source according to the output of the heat ray sensor, a heat ray sensor that houses the heat ray sensor, and the heat ray from the detection range A lens block having a condensing lens for condensing the light, and a housing having a window hole for exposing the condensing lens and rotatably holding the lens block so as to change a detection range. It is an automatic switch with a heat ray sensor that is embedded, and the housing includes a flange portion whose rear surface abuts against the surface of the construction material, and a decorative plate that covers the front surface of the flange portion is attached to the flange portion. A locking hole is provided in the decorative plate, and a locking claw that locks the locking plate in the locking hole is provided to restrict the rotation of the flange on the outer peripheral edge of the flange portion and the inner peripheral edge of the decorative plate. Hot wire automatic switch with sensor, characterized in that provided optimum plurality of ribs, respectively. The automatic switch with a heat ray sensor according to claim 1, wherein an auxiliary rib that represents the outer shape of the flange portion is provided on a surface of the decorative plate facing the flange portion.

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