JP4456628B2 - Automatic switch with hot wire sensor - Google Patents

Description

  The present invention relates to an automatic switch with a heat ray sensor.

  Conventionally, a heat ray sensor for detecting a heat ray radiated from a human body, a control means for generating a control signal according to the presence or absence of a human body when a heat ray is detected by a heat ray sensor, and a plurality of pairs of electric wires to which electric wires are respectively connected The switch means for turning on and off the electrical connection between the connection terminals and the wire connection terminals constituting the pair according to the control signal output by the control means, the heat ray sensor, the control means, the switch means, and each wire connection terminal, respectively. And an automatic switch with a heat ray sensor that is embedded in an embedding hole provided on the ceiling surface, and includes a housing provided with a window portion that allows heat rays from a predetermined detection range to enter the light receiving surface of the heat ray sensor. Is provided (for example, refer to Patent Document 1).

This type of automatic switch with a heat ray sensor, for example, connected one side of a pair of wire connection terminals to a power source, and connected the other side of the pair of wire connection terminals to a load such as a lighting or a ventilation fan, so that a person entered the room The power supply from the power supply to the load is sometimes turned on, and the power supply from the power supply to the load is turned off when a person leaves the room.
JP 2005-135612 A

  In general, a switch box SB shown in FIG. 15 may be used for embedding electrical equipment. The switch box SB has a rectangular parallelepiped shape with one surface opened as a whole, and is used by being fixed in the embedding hole with the opening surface facing the indoor side. Further, at both ends in the longitudinal direction of the opening surface of the switch box SB, a fixing portion SB1 through which a screw hole SB2 is penetrated is protruded inward, and the electric device is switched by screwing to the fixing portion SB1. It is fixed to the box SB. Further, the four walls adjacent to the opening surface of the switch box SB are provided with knockout portions SB3 that can be cut out in a circular range, and if the knockout portion SB3 is cut out as necessary, the electrical equipment A hole is formed through which the electric wire connected to is inserted. When such a switch box SB is used for an electric device arranged on the ceiling like the above automatic switch with a heat ray sensor, the switch box SB has an opening surface in an embedded hole provided on the ceiling surface. Is fixed downward.

  However, in the automatic switch with a heat ray sensor of the type arranged on the ceiling as described above, conventionally, the circuit parts constituting the switch means, the circuit parts constituting the control means, and the wire connection terminals are all in the housing. Since it was stored in the portion to be stored in the embedded hole, the portion stored in the embedded hole in the housing was likely to be large. For this reason, it is difficult to design the switch box so that the above-mentioned part of the housing can be stored in an existing switch box that is stored and used in the embedded hole of the housing when embedded. It was.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide an automatic switch with a heat ray sensor that is easy to design so as to be able to be installed using an existing switch box. .

According to the first aspect of the present invention, a wire is connected to each of a heat ray sensor that detects a heat ray radiated from a human body, a control unit that generates a control signal according to the presence or absence of the human body when the heat ray is detected by the heat ray sensor. Switch means for turning on / off a plurality of pairs of electric wire connection terminals and electric connection between the electric wire connection terminals constituting the pair in accordance with a control signal output by the control means, a heat ray sensor, a control means, a switch means, and each electric wire connection And a housing provided with a window portion for receiving heat rays from a predetermined detection range on the light receiving surface of the heat ray sensor, and the housing is provided with a window portion on the lower surface and is upward when embedded. A main body portion that is fixed to the ceiling material with the outer surface abutting against the ceiling surface, and at least an electric wire insertion hole that protrudes upward from the upward outer surface of the main body portion and through which the electric wire connected to the electric wire connection terminal is inserted Each of the circuit parts constituting the heat ray sensor and the control means, and the circuit parts constituting the switch means. Are respectively disposed below the outer surface that comes into contact with the ceiling surface when embedded in the main body of the housing.

  According to the present invention, the terminal block can be downsized as compared with the case where the circuit component constituting the control means and the circuit component constituting the switch means are accommodated in the terminal block, so that the terminal block is embedded. It is easy to design to enable construction using a switch box as a dimensional shape that can be stored in an existing switch box for installation.

  The invention of claim 2 is characterized in that, in the invention of claim 1, each electric wire insertion hole opens in a surface directed in the horizontal direction.

  According to this invention, it is difficult for dust and water droplets to enter the wire insertion hole as compared with the case where the wire insertion hole is opened on the upward surface.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the weak electric current in which the heat ray sensor and each circuit component constituting the control means are mounted and held in the housing with the thickness direction directed vertically. It is characterized by comprising a substrate, and a high-voltage substrate that is mounted in the housing in such a manner that each wire connecting terminal and each circuit component that constitutes the switch means are mounted so that the thickness direction intersects the vertical direction.

  According to the present invention, compared to a case where the thickness direction of the high voltage substrate is directed vertically, dust and water droplets are less likely to accumulate on the high voltage substrate, and accordingly, short circuit due to dust and water droplets is less likely to occur on the high voltage substrate. Compared with the case where the circuit components constituting the heat ray sensor, the control means, the electric wire connection terminals, and the circuit parts constituting the switch means are all mounted on the low-power board and the high-power board is not provided, it is viewed from above and below. The size and shape can be reduced.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the high power board is held in the housing in such a manner that one surface in the thickness direction faces the weak power board, and each circuit component constituting the switch means is It is mounted on the surface opposite to the surface directed to the weak electric substrate in the high electric substrate.

  According to the present invention, the circuit component of the control means receives the electromagnetic noise generated by the circuit component of the switch means, as compared with the case where each circuit component constituting the switch means is mounted on the surface of the high power board facing the weak power board. Can prevent malfunctions.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the housing has a body that constitutes the upper surface of the housing, and a cover that is mechanically coupled to the body and constitutes the lower surface of the housing. The lower surface of the body has at least one pair of pinching protrusions protruding downward from the opposite sides in the thickness direction for positioning the high voltage substrate in the thickness direction. .

  According to the present invention, the assembly is facilitated as compared with the case where the pinching protrusion is not provided.

According to the first aspect of the present invention, the housing is provided with a main body portion provided with a window portion on the lower surface and fixed to the ceiling material with the upper surface facing the ceiling surface when embedded, and the upper portion of the main body portion facing upward. At least one wire insertion hole that protrudes upward from the outer surface and through which the wire connected to the wire connection terminal is inserted, and a terminal base portion that is housed in the embedded hole provided in the ceiling surface when embedded A heat ray sensor that detects a heat ray emitted from the human body, and each circuit component that constitutes a control unit that generates a control signal according to the presence or absence of the human body when the heat ray is detected by the heat ray sensor. Each of the circuit components constituting the switch means for turning on / off the electrical connection between the wire connection terminals in accordance with a control signal output by the control means, the outer surface abutting against the ceiling surface in the housing main body when being embedded. Placed below It is characterized in that is.

  According to the present invention, the terminal block can be downsized as compared with the case where the circuit component constituting the control means and the circuit component constituting the switch means are accommodated in the terminal block, so that the terminal block is embedded. It is easy to design to enable construction using a switch box as a dimensional shape that can be stored in an existing switch box for installation.

  According to the second aspect of the present invention, since each wire insertion hole opens in a surface directed in the horizontal direction, dust and water droplets are generated in the wire insertion hole as compared with the case where the wire insertion hole is opened in the upward surface. It becomes difficult to enter.

  According to the invention of claim 3, the weak electric circuit board in which the heat ray sensor and each circuit component constituting the control means are respectively mounted and held in the housing with the thickness direction directed in the vertical direction, each electric wire connection terminal, and the switch Since each circuit component constituting the means is mounted and held in the housing in such a manner that the thickness direction intersects with the up and down direction, compared with the case where the thickness direction of the high voltage board is directed in the up and down direction In addition, dust and water droplets are unlikely to accumulate on the high voltage substrate, and therefore, short circuits due to dust and water droplets are less likely to occur on the high voltage substrate. Compared with the case where the circuit components constituting the heat ray sensor, the control means, the electric wire connection terminals, and the circuit parts constituting the switch means are all mounted on the low-power board and the high-power board is not provided, it is viewed from above and below. The size and shape can be reduced.

  According to the invention of claim 4, the high-power board is held in the housing in such a manner that one surface in the thickness direction is directed to the weak-power board, and each circuit component constituting the switch means is a low-power board in the high-power board. As compared with the case where each circuit component constituting the switch means is mounted on the surface directed to the weak electric board in the high power board, the electromagnetic noise generated by the circuit parts of the switch means is reduced. It is possible to suppress malfunction caused by receiving the circuit parts of the control means.

  According to the invention of claim 5, the housing has a body that constitutes the upper surface of the housing and a cover that is mechanically coupled to the body and constitutes the lower surface of the housing. Since at least one pair of pinching protrusions for positioning the high-voltage board in the thickness direction by sandwiching the substrate from both sides in the thickness direction protrudes downward, the assembly is easier than when no pinching protrusions are provided. It becomes easy.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the present embodiment, as shown in FIGS. 1 to 4, a heat ray sensor TP that detects a heat ray emitted from the human body and a control signal that generates a control signal according to the presence or absence of the human body when the heat ray is detected by the heat ray sensor TP. The weak electric block 1 in which each circuit component constituting the means is mounted on the weak electric substrate 10, a plurality of pairs of electric wire connecting terminals 3 to which electric wires PC (see FIG. 11) are connected, respectively, and the control output by the control means In response to the signal, each circuit component constituting the switch means for turning on and off the electrical connection between the wire connecting terminals 3 constituting the pair is incident on the high-power block 2 formed on the high-power board 20 and the heat ray sensor TP. A housing 4 having a window hole 41a through which heat rays pass is housed and housing the low-power block 1 and the high-power block 2 respectively. And a lens block 5 which is held by the housing 4 in a manner to close the window hole 41a has a lens 51 for the light.

  For example, when the output of the heat ray sensor TP exceeds a predetermined threshold value, the control means controls the switch means to turn on the electrical connection between the paired wire connection terminals 3, and the output of the heat ray sensor TP is set to the predetermined value. The switch means is controlled again after a predetermined delay time from the time when the value falls below the threshold value, and the electrical connection between the paired wire connection terminals 3 is turned off, and detailed description is omitted because it can be realized by a known technique. To do. Further, the switch means is made of a known relay, for example.

  Hereinafter, the vertical and horizontal directions are based on FIG. 1B, and the vertical direction in FIG. That is, the lower left-upper right direction in FIG. 3 is referred to as the left-right direction, and the lower right-upper left direction in FIG.

  The housing 4 is inserted with a body 41 having a circular outer periphery viewed from below and having a window hole 41a opened on the lower surface, and an electric wire PC protruding from the upper surface of the body 41 and connected to the wire connection terminal 3. The electric wire insertion hole 42a has a terminal block portion 42 opened on the front surface. Since the wire insertion hole 42a is opened on the front surface, which is a surface oriented in the horizontal direction, dust and water droplets are less likely to enter the wire insertion hole 42a than when the wire insertion hole 42a is opened on the upper surface. It has become.

  The weak electric block 1 is housed in the main body 41 of the housing 4 with the thickness direction of the weak electric substrate 10 facing up and down. The heat ray sensor TP and each circuit component constituting the control means are respectively mounted on the downward surface of the weak electric substrate 10, and the heat ray sensor TP is mounted at a position that becomes the center of the housing 4 when viewed from below. In addition, two adjustment elements VR for manually setting the delay time and the sensitivity of the heat ray sensor TP are mounted on the lower surface of the weak electric substrate 10. One adjustment element VR is mounted on the lower surface of the housing 4. Two circular knob insertion holes 41b through which the knobs for operation of the respective adjustment elements VR are inserted are penetrated inside and outside. For example, a variable resistor or a multi-contact switch is used as the adjustment element VR.

  The high-power block 2 is disposed on the rear side of the low-power board 10 with the thickness direction of the high-power board 20 facing the front-rear direction. As shown in FIGS. 5 (a) and 5 (b), the high-voltage board 20 has a terminal mounting portion 20a on which the electric wire connection terminals 3 are mounted on the front surface, and a switch means continuously below the terminal mounting portion 20a. Each circuit component to be configured includes a switch mounting portion 20b mounted on the rear surface. The switch mounting portion 20b protrudes to the left and right sides of the terminal mounting portion 20a, and the high-voltage board 20 has an inverted T shape as a whole. The weak electric substrate 10 and the high electric substrate 20 are electrically connected to each other via a flat cable FC.

  As shown in FIG. 6, each wire connection terminal 3 has a terminal plate 31 having a terminal portion 31 a electrically connected to the high-voltage board 20, and presses the electric wire PC against the terminal plate 31 and one end to the electric wire PC. This is a so-called quick-connecting terminal including a locking spring 32 that is bitten (that is, locks the electric wire PC) and maintains the electric wire PC in contact with the terminal plate 31.

  Two to four wire connection terminals 3 are provided, and each wire connection terminal 3 is housed in a terminal case 21 fixed to the high voltage substrate 20 as shown in FIG. The terminal case 21 is made of, for example, a synthetic resin molded product, and has a rectangular parallelepiped shape that is long on the left and right sides with an open rear surface (upper surface in FIG. 6). On the front surface of the terminal case 21, four wire insertion holes 42 a corresponding to the wire connection terminals 3 on a one-to-one basis are arranged side by side in the left and right directions, and when the wire PC is inserted into the wire insertion hole 42 a, the wire PC The electric wire PC is connected (locked) to the electric wire connection terminal 3 corresponding to the electric wire insertion hole 42a into which the is inserted. Further, the terminal case 21 has a front side of the two locking springs 32 of the corresponding pair of wire connection terminals 3, one for each pair of the wire connection terminals 3 arranged on the left and right, each made of a synthetic resin molded product, for example. The release buttons 22 located at the bottom of the terminal case 21 are housed, and on the front side of the terminal case 21, the release holes 42b for exposing the release buttons 22 one by one are provided below the portion sandwiched between the pair of wire insertion holes 42a. It is installed in the front and back. When the electric wire PC connected to the electric wire connection terminal 3 is pulled out, if a jig such as a flathead screwdriver is inserted through the release hole 42b and the release button 22 is pressed backward, the release button 22 is connected to a pair of wires. Each lock spring 32 of the terminal 3 is elastically deformed to release the lock, and the electric wire PC can be pulled out.

  Further, the terminal case 21 has a rectangular parallelepiped shape with an open rear surface, accommodates each electric wire connection terminal 3, and has a main body portion 21a with each electric wire insertion hole 42a and each release hole 42b opened on the front surface, and the main body portion 21a. A fixing portion 21b that protrudes outward in the left-right direction from the rear end portions of the left and right surfaces. As shown in FIG. 8, the terminal case 21 has a fixing hole 21c that extends through the fixing portion 21b in the front-rear direction and a fixing that extends through the left and right ends of the terminal mounting portion 20a of the high-voltage board 20 respectively. Two rivets RV inserted through the holes 20c as indicated by an arrow A1 fix the opening on the rear surface to the high-voltage board 20 in such a manner as to be closed by the terminal mounting portion 20a of the high-voltage board 20. Further, on the rear surface of each fixing portion 21b of the terminal case 21, a positioning convex portion 21d is projected rearward below the fixing hole 21c, and a positioning hole 20d is provided through the high-voltage board 20 in the front and rear direction. When the case 21 is fixed to the high-voltage substrate 20, the terminal case 21 can be positioned by engaging the positioning projection 21d with the positioning hole 20d. Further, the terminal portions 31a of the terminal boards 31 are respectively inserted into the high-power board 20, and are electrically and mechanically connected to the high-power board 20 by, for example, soldering.

  As shown in FIGS. 3, 4 and 9A and 9B, the lens block 5 includes a condensing lens 51 formed in a hollow hemispherical shape and a convex of the condensing lens 51 from one end directed downward. A cylindrical holding frame 52 that is mechanically coupled to the condensing lens 51 so as to project a curved surface and is closed by the condensing lens 51 is provided. As means for coupling the condenser lens 51 to the holding frame 52, for example, well-known means such as fitting or uneven engagement can be used. The condenser lens 51 is a multifocal lens made of a synthetic resin molded product, for example. Further, the outer peripheral surface of the holding frame 52 is formed in a spherical shape having a center at a position surrounded by the holding frame 52. At two positions sandwiching the center of the spherical shape of the outer peripheral surface of the holding frame 52, a cylindrical shaft convex portion 52a whose axis passes through the center of the spherical surface is projected, and the shaft convex portion 52a has a window hole 41a. Is placed on the peripheral edge of the upper opening. That is, by rotating the lens block 5 with respect to the housing 4 with the shaft convex portion 52a as a fulcrum, the detection range can be changed by changing the direction of the lens block 5 to some extent. Here, the focal point of the condensing lens 51 and the center of the light receiving surface (lower surface) of the heat ray sensor TP are both located at the center of the spherical surface of the outer peripheral surface of the holding frame 52. Even when rotated in this way, the focal point of the condenser lens 51 is always located at the center of the light receiving surface of the heat ray sensor TP.

  The lens block 5 includes a pressing spring 53 that is formed of a leaf spring and holds the holding frame 52 against the housing. The pressing spring 53 is formed by punching and bending a metal plate, for example, and has an annular shape as a whole, and is provided with a plurality of long slits in the circumferential direction so that the central portion is located with respect to the outer peripheral portion. Elastic deformation that can be displaced up and down is possible. Further, coupling protrusions 53a are provided on the upper and lower ends of the left and right ends of the pressing spring 53 so as to project outward in the vertical direction. Each coupling convex portion 53a is inclined upward toward the tip. In addition, on the upward inner surface of the housing 4 (the upper surface of the cover 6 described later), a partition wall convex portion 41c surrounding the lens block 5 and the heat ray sensor TP together with the high-voltage substrate 20 is seen around the window hole 41a. It protrudes upward. At three locations on the inner peripheral surface of the partition convex portion 41c, coupling concave portions 41d into which one coupling convex portion 53a is engaged are provided. Further, a holding convex portion 41e provided with a coupling concave portion 41d into which one coupling convex portion 53a of the pressing spring 53 is engaged protrudes upward on the left rear side of the window hole 41a on the upward inner surface of the housing 4. Has been. As shown in FIG. 10, the pressing spring 53 has its coupling convex portion 53 a engaged with the coupling concave portion 41 d and elastically contacting the downward inner surface of the coupling concave portion 41 d, so that the upward displacement with respect to the housing 4 is limited. Yes. In addition, the partition wall convex portion 41 c has a shape that allows clearance between the lens block 5 and the lens block 5 on both the left and right sides of the lens block 5. As a result, the lens block 5 can be easily assembled to the housing 4 (more specifically, a cover 6 described later) compared to the case where there is no gap as described above.

  The pressing spring 53 is configured such that the upper end portion of the holding frame 52 is fitted inside and the outer peripheral portion is fixed to the housing 4, so that the holding frame 52 is directed upward of the housing 4 at the peripheral edge portion of the window hole 41 a. Press against the inside. Further, the outer diameter of the holding frame 52 is larger than the inner diameter of the window hole 41a, and a frictional force is generated between the outer peripheral surface of the holding frame 52 and the inner peripheral surface of the window hole 41a by the spring force of the pressing spring 53. Therefore, unless an operating force is applied to the holding frame 52, the orientation of the holding frame 52 with respect to the housing 4 is maintained by the above frictional force. Further, the shaft convex portion 52a of the holding frame 52 is rotatable between the pressing spring 53 and the upward inner surface of the housing 4 around the center of the window hole 41a when viewed from the top and bottom directions. 4, the rotation axis of the holding frame 52 can be changed.

  Furthermore, when it is necessary to narrow the detection range, an annular hood FD (see FIG. 11) made of a material that blocks heat rays may be attached to the lower side of the lens block 5.

  The housing 4 is made of a synthetic resin molding and has a bottomed cylindrical shape having an open top surface and a flat top and bottom. A circular window hole 41a is provided vertically through the center of the bottom surface and the front side of the window hole 41a. In FIG. 2, two knob insertion holes 41 b are arranged side by side in the vertical direction, the partition wall convex portion 41 c and the holding convex portion 41 e are provided on the upper surface, respectively, and the cover 6 constituting the lower surface and the outer peripheral surface of the housing 4, and synthetic resin molding And a body 7 which is mechanically coupled to the cover 6 in a form in which the lower end portion is housed in the cover 6 and which closes the upper opening of the cover 6 and constitutes the upper surface of the housing 4.

  As shown in FIG. 2, the body 7 has a disc shape with the thickness direction directed in the vertical direction, and a body portion 71 accommodated in the cover 6 and left and right on the rear side from the center of the upper surface of the body portion 71. It has a long rectangular parallelepiped shape and a terminal accommodating portion 72 that bulges upward and accommodates the terminal case 21. In the front surface of the terminal storage portion 72, an exposure hole 72 a that exposes the front surface of the terminal case 21 in which the wire insertion hole 42 a is opened is provided through the front and rear. That is, the terminal base portion 42 is configured by the terminal case 21 and the terminal storage portion 72 of the body 7. In the main body 71, a positioning groove 72b opened in the vertical direction and rearward (exposed hole 72a side) is provided on the front side of the central portion in the left-right direction of the exposed hole 72a. A positioning protrusion 21e that is long in the vertical direction protrudes forward from the center of the front surface of the terminal case 21 in the left-right direction. During assembly, the positioning protrusion 21e is inserted into the positioning groove 72, thereby The strong electric block 2 is positioned with respect to the body 7.

  Further, a cylindrical annular convex portion 7 a is provided projecting downward from the peripheral edge of the main body portion 71 of the body 7. On the inner peripheral surface of the cover 6, there is provided a step 6a that makes the upper inner diameter larger than the lower side. The inner diameter of the cover 6 above the step 6 a is slightly larger than the outer diameter of the main body 71 of the body 7, and the inner diameter of the cover 6 below the step 6 a is outside the main body 71 of the body 7. The body 7 is covered with the upper surface of the main body 71 substantially flush with the upper end surface of the cover 6 by the lower end of the annular projection 7a being in contact with the upper surface of the step 6a. 6 is forbidden to fall downward. A positioning groove 7b is provided at the front end of the body 7 so as to be opened in the vertical direction and outward in the radial direction. A positioning groove 7b is inserted into the rearward inner peripheral surface of the front end portion of the cover 6. The convex portion 6b protrudes rearward, and the positioning convex portion 6b engages with the positioning groove 7b, whereby the body 7 is positioned with respect to the cover 6 in the plane as viewed from the vertical direction. .

  In addition, on the inner bottom surface of the cover 6, there are contact projections 61 having a U-shaped cross section whose both ends are connected to the inner peripheral surface of the cover 6 at three positions including the rear end and shifted by 120 degrees. A spring piece 62 protrudes upward from a range protruding upward and surrounded by the contact protrusion 61. Each spring piece 62 is elastically deformed so that the upper end is displaced in the radial direction of the cover 6 with respect to the lower end by forming the vicinity of the central portion in the vertical direction thin in the radial direction of the cover 6. It has become. A locking claw 62 a protrudes from the upper end of each spring piece 62 in a direction approaching the central axis of the cover 6. The upper ends of the respective locking claws 62a are inclined so as to increase the protruding dimension downward. Further, on the lower surface of the body 7, three abutting convex portions 73 whose lower end surfaces abut one-on-one with the upper end surface of the abutting convex portion 61 of the cover 6 protrude downward. Each contact protrusion 73 of the body 7 has a U-shaped cross section similar to each contact protrusion 61 of the cover 6. Locking protrusions 73a to which the locking claws 62a are locked project from the respective surfaces facing outward at the lower ends of the contact protrusions 73 of the body 7. That is, when the cover 6 and the body 7 are coupled to each other, the position of the body 7 with respect to the cover 6 is aligned and the body 7 is pushed into the cover 6. Each spring piece 62 is elastically deformed by sliding of the locking projection 73a, and when each locking claw 62a gets over the locking projection 73a of the body 7, each spring piece 62 is elastically restored. Thus, each of the locking claws 62a enters (that is, is locked) above the locking projection 73a of the body 7, and here, the cover 6 and the body 7 are mechanically coupled. Further, on the lower surface of each locking projection 73 a of the body 7, a positioning piece 73 b that enters between the contact projection 61 of the cover 6 and the spring piece 62 and contributes to positioning protrudes downward. .

  Further, the cover 6 and the body 7 are coupled to each other by screwing. More specifically, the body 7 has a screw insertion hole 74a through which an assembly screw SC2 (see FIG. 13) for screwing to the cover 6 is inserted vertically, and the inner surface of the lower surface of the body 7 is a screw insertion hole. A cylindrical screw insertion portion 74 that constitutes the inner surface of 74a protrudes downward. On the upper surface of the cover 6, a cylindrical screw-fixing convex portion 63 projecting upward is provided with a screw hole 63 a opened on the upper surface and the upper surface contacting the lower surface of the screw insertion portion 74. That is, the assembly screw SC2 is inserted into the screw insertion part 74 of the body 7 and screwed into the screwing part 63 of the cover 6 to generate a coupling force between the cover 6 and the body 7. On the upper surface of the body 7, there is provided a storage recess 74 b in which a screw insertion hole 74 a is opened at the center of the bottom surface and the head of the assembly screw is stored.

  Here, as shown by an arrow A2 in FIG. 11, the housing 4 has an upper surface of the main body 41 abutted against the lower surface (that is, the ceiling surface) of the ceiling material CE, and is embedded in the ceiling material CE and opened to the ceiling surface. The terminal block 42 is housed in the insertion hole CE1 and can be fixed to the ceiling material CE by screwing using a mounting screw SC1.

  In the housing 4, screw insertion holes 41 f that are elongated in the left and right direction and through which the mounting screw SC <b> 1 is inserted are vertically provided on both the left and right sides of the window hole 41 a, and on the lower surface of the housing 4. On the bottom surface (downward inner surface), there is provided a storage recess 41g in which a screw insertion hole 41f is opened and the head of the mounting screw SC1 is stored. Further, on the upper surface of the main body portion 41 of the housing 4 (that is, the upper surface of the main body portion 71 of the body 7), the cross-sectional shape of the screw insertion hole 41f in the horizontal cross section at the upper end portion of the screw insertion hole 41f is a round hole shape. A recess 41i is provided, which is used when a terminal block cover (not shown) covering the terminal block 42 is attached.

  In addition, two screw insertion cylinders 64 and 75 each projecting upward are provided on the inner bottom surface of the cover 6 and the lower surface of the main body 71 of the body 7, each having an inner peripheral surface constituting the inner surface of the screw insertion hole 41 f. ing. The outer peripheral surface of the screw insertion tube 64 on the cover side 6 is provided with a step 64a that makes the upper outer shape slightly smaller than the lower outer shape, and the lower surface on the inner peripheral surface of the screw insertion tube 75 on the body 7 side. In the state where the cover 6 and the body 7 are coupled to each other, the upper end portion of the screw insertion cylinder 64 of the cover 6 is the screw insertion cylinder 75 of the body 7. Is inserted into the lower end of the.

  Here, as shown in FIG. 12, a circular insertion hole 10 a through which the screw insertion portion 63 of the cover 6 is inserted is vertically provided in the weak electrical substrate 10, and the outer side in the left-right direction and both the upper and lower sides are provided. The insertion notches 10b through which the screw insertion cylinders 64 of the cover 6 are inserted are respectively provided at both left and right ends. The inner diameter of the insertion hole 10a is slightly larger than the outer diameter of the screw insertion portion 63 of the cover 6, and the width dimension (front and rear dimensions) of the insertion notch 10b is the upper side of the step 64a. Are slightly larger than the front and rear dimensions of the screw insertion cylinder 64 and smaller than the front and rear dimensions of the screw insertion cylinder 64 below the step 64a. Further, in the cover 6, the step 64a of the screw insertion cylinder 64 and the upper end surface of the partition wall convex portion 41c are flush with each other. That is, the weak electric substrate 10 is placed on the step 64a of the screw insertion cylinder 64 and the partition convex portion 41c, and the horizontal displacement of the weak electric substrate 10 with respect to the housing 4 is caused by the screw insertion portion 74 into the insertion hole 10a. The insertion and the insertion of the screw insertion cylinder 64 into the insertion notch 10b are prohibited. Further, the upward displacement of the weak electric substrate 10 with respect to the housing 4 is prohibited when the lower end surface of the screw insertion cylinder 75 of the body 7 contacts the upper surface of the weak electric substrate 10. As described above, the weak electrical substrate 10 is positioned with respect to the housing 4.

  Further, the switch mounting portion 20b of the high-voltage board 20 is provided on both the left and right ends of the inner bottom surface of the cover 6 and the left and right ends of the upper surface of the main body 71 of the body 7 from both sides in the thickness direction. The sandwiching projections 65 and 76 are sandwiched. Each sandwiching portion 76 of the body 7 projects downward from the annular convex portion 7a. The above-described sandwiching portion 65 on the rear side of the cover 6 and the lower end portion of each sandwiching portion 76 of the body 7 are arranged so that the distance between the other sandwiching portions 65 and 76 arranged in the front and rear directions increases toward the tip. The surface facing the other sandwiching portions 65 and 76 is inclined, which facilitates the introduction of the high-voltage board 20 between the sandwiching portions 65 and 76. The displacement of the high-voltage block 2 relative to the housing 4 is prohibited when the high-voltage board 20 is sandwiched between the sandwiching portions 65 and 76 in the front-rear direction, and the high-voltage board 20 is sandwiched between the cover 6 and the body 7 in the vertical direction. The switch mounting portion 20b of the high-voltage board 20 is prohibited by being sandwiched between the annular convex portion 7a of the body 7 and the inner peripheral surface of the cover 6. Further, since the high-power block 2 is positioned by the above configuration, the high-power board 20 is in contact with the rear end of the weak-power board 10 and the rear end of the partition wall protrusion 41c. That is, the space in which the heat ray sensor TP is accommodated is blocked by the high-power substrate 20, the low-power substrate 10, the cover 6, and the lens block 5. Thereby, before the airflow which flows in from the exterior of the housing 4 hits the heat ray sensor TP, the malfunction by the said airflow is suppressed. Furthermore, when the heat sensor TP is made of, for example, a synthetic resin and is attached with a sensor cover TC that transmits heat rays and blocks the airflow, malfunction can be prevented more reliably. Even if the sensor cover TC is omitted and the number of parts is reduced, the malfunction is sufficiently suppressed. Here, even if the sandwiching projections 65 and 76 are provided only on the cover 6, for example, the high-voltage substrate 20 can be positioned. However, in the present embodiment, the body 7 is also provided with the sandwiching projections 76. Compared to the case where the sandwiching convex portion 76 is not provided, the position of the high-voltage substrate 20 is easily stabilized during assembly, and the assembly is facilitated.

  A plurality of reinforcing projections 66 and 77 are provided on the upper surface of the cover 6 and the lower surface of the body 7 so as to protrude inward in the vertical direction. 7 abutment projections 61 and 73 are connected to one of the reinforcement projections 66 and 77, respectively.

  Further, as shown by arrows A3 in FIGS. 11 and 13 respectively, the housing 4 can be detachably attached with a decorative cover 8 covering the knob of the adjustment element VR and the screw insertion hole 41f in order to improve the appearance. It has become. The decorative cover 8 is made of, for example, a synthetic resin molded product, and has a bottom 81 in which an outer periphery viewed from below is circular, and a window hole 81a through which the lens block 5 is exposed when viewed from below is vertically formed. And a cylindrical peripheral wall portion 82 projecting upward from the outer periphery of the upper surface of the housing 4 and surrounding the main body portion 41 of the housing 4. The bottom 81 of the decorative cover 8 has an outer peripheral portion inclined downward inward in the radial direction, a central portion inclined upward inward in the radial direction, and the periphery of the window hole 81a has an annular shape. The shape bulges downward. This expansion causes the opening edge of the window hole 81a to be positioned sufficiently higher than the lower end of the sensor block 5 while ensuring a space in which the knob of the adjustment element VR is accommodated, and the heat ray to be detected by the heat ray sensor TP. To avoid interference.

  A locking projection 41 h is provided on the outer peripheral surface of the main body 41 of the housing 4 so as to project radially outward over the entire circumference, and the locking projection 41 h is provided on the inner peripheral surface of the peripheral wall portion 82 of the decorative cover 8. A plurality of (e.g., three) locked protrusions 82a to be locked are projected inward in the radial direction at equal intervals in the circumferential direction, and the decorative cover 8 is provided with each locked protrusion 82a. Are detachably coupled to the housing 4 by being latched by the latching projection 41 h of the housing 4. Engagement / disengagement between the locking projection 41h and each locked projection 82a is performed by elastically deforming the decorative cover 8. In addition, the locking convex portion 41h has an axial target (infinitely rotationally symmetric) shape with respect to the central axis of the main body portion 41 of the housing 4, and each locked convex portion 82a has a common vertical position. It has become. Thereby, when the decorative cover 8 is attached to and detached from the housing 4, alignment for rotating the decorative cover 8 around the central axis with respect to the housing 4 is unnecessary.

  Here, in the present embodiment, only each power connection terminal 3 among each power connection terminal 3, each circuit component constituting the switch means, the heat ray sensor TP, and each circuit part constituting the control means, respectively. The other portions are located above the upper surface of the main body 41 of the housing 4, and the others are all disposed in the main body 41 of the housing 4 (that is, lower than the upper surface of the main body 41).

  Thereby, since this embodiment can make the size and shape of the terminal block 42 small enough to be accommodated in the existing switch box SB, construction using the switch box SB is possible. . That is, as shown in FIG. 14, the terminal block 42 is housed in the switch box SB, and the mounting screws SC1 inserted through the screw insertion holes 41f are respectively screwed into the screw holes SB2 of the fixing part SB1 of the switch box SB. Thus, it can be attached to the switch box SB.

  According to the above configuration, each circuit component constituting the switch means, the heat ray sensor TP, and each circuit component constituting the control means are embedded in the housing 4 as compared with the case where they are arranged above the upper surface of the main body 41. Since it is not necessary to use particularly small parts to make the portion housed in the hole dimensionable and shapeable in the switch box SB, it is easy to design to enable construction using the existing switch box SB. It has become.

  Further, since the thickness direction of the high-voltage board 20 is directed in the front-rear direction, which is the horizontal direction, dust and water droplets accumulate on the high-voltage board 20 as compared with the case where the thickness direction of the high-voltage board 20 is set in the vertical direction. Therefore, a short circuit due to dust or water droplets is unlikely to occur in the high-power substrate 20. Furthermore, compared with the case where all the circuit components constituting the heat ray sensor TP, the control means, each wire connecting terminal 3 and each circuit component constituting the switch means are mounted on the weak electric board 10 and the high electric board 20 is not provided. It is possible to reduce the size and shape as viewed from above and below.

  Further, since each circuit component constituting the switch means is mounted on the rear surface of the high-power board 20 opposite to the face directed to the weak-power board 10, each circuit component constituting the switch means is mounted on the high-power board, respectively. As compared with the case where the circuit component of the switch means is mounted on the front surface, which is a surface directed to the weak electric substrate, the malfunction due to the electromagnetic noise generated by the circuit component of the switch means being suppressed can be suppressed.

It is a figure which shows embodiment of this invention, (a) is a bottom view, (b) is a front view, (c) is a left view. It is sectional drawing which shows the same as the above. It is the disassembled perspective view seen from the upper side which shows the same. It is the disassembled perspective view seen from the lower side which shows the same. (A) (b) is a perspective view which respectively shows the same high-voltage block, (a) (b) shows the state seen from a mutually different direction. It is a disassembled perspective view which shows the principal part of a high electric power block same as the above. It is a disassembled perspective view which shows the high electric power block same as the above. It is explanatory drawing which shows the assembly method of a high electric block same as the above. (A) (b) is a perspective view which respectively shows a lens block same as the above, (a) (b) shows the state seen from a mutually different direction. It is a perspective view which shows the state in which the lens block was attached to the cover in the same as the above. It is explanatory drawing which shows an example of the usage pattern same as the above. It is a perspective view which shows the state in which the light electric block and the high electric block were each attached to the cover in the same as the above. It is a perspective view which shows a housing and a decorative cover same as the above. It is a top view which shows the state attached to the switch box same as the above. It is a perspective view which shows a switch box.

Explanation of symbols

3 Wire connection terminal 4 Housing 10 Light electrical circuit board 20 High power circuit board 41 Main body part 41a Window hole 42 Terminal block part 42a Wire insertion hole CE1 Embedded hole SB Switch box TP Heat ray sensor

Claims (5)

A heat ray sensor for detecting heat rays emitted from the human body;
Control means for generating a control signal according to the presence or absence of a human body when a heat ray is detected by a heat ray sensor;
Multiple pairs of wire connection terminals to which the wires are respectively connected;
Switch means for turning on and off the electrical connection between the wire connection terminals constituting the pair in accordance with a control signal output by the control means;
A heat ray sensor, a control means, a switch means, and each electric wire connecting terminal are respectively housed, and a housing provided with a window part for allowing heat rays from a predetermined detection range to enter the light receiving surface of the heat ray sensor,
The housing is provided with a window portion on the lower surface, and a main body portion that is fixed to the ceiling material with the upward outer surface being in contact with the ceiling surface when embedded, and projects upward from the upward outer surface of the main body portion. At least one electric wire insertion hole through which an electric wire connected to the terminal is inserted and is housed in an embedding hole provided on the ceiling surface during embedding arrangement, and
Each circuit component constituting the heat ray sensor and the control means and each circuit component constituting the switch means are respectively disposed below the outer surface that comes into contact with the ceiling surface when being embedded in the main body of the housing. An automatic switch with a heat ray sensor.   2. The automatic switch with a heat ray sensor according to claim 1, wherein each electric wire insertion hole is opened in a surface directed in the horizontal direction.   A weak electric circuit board in which a heat ray sensor and each circuit component constituting the control means are mounted and held in the housing with the thickness direction directed vertically, and each circuit component constituting each wire connection terminal and switch means 3. The automatic switch with a heat ray sensor according to claim 1 or 2, further comprising a high-power board mounted in a housing so as to be respectively mounted and having a thickness direction intersecting with the vertical direction. The high-voltage board is held in the housing in such a manner that one surface in the thickness direction faces the low-voltage board,
4. The automatic switch with a heat ray sensor according to claim 3, wherein each circuit component constituting the switch means is mounted on a surface opposite to a surface of the high power substrate facing the weak power substrate. The housing has a body that constitutes the upper surface of the housing, and a cover that mechanically couples to the body and constitutes the lower surface of the housing,
The lower surface of the body is provided with at least one pair of sandwiching protrusions for projecting downward from each other in order to position the high-power board in the thickness direction by sandwiching the high-power board from both sides in the thickness direction. The automatic switch with a heat ray sensor according to claim 3 or 5.

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