JP2018174062A - Automatic switch with hot-wire sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve visibility of mode display for user, while assembling a cover in more stable state, in an automatic switch with hot-wire sensor.SOLUTION: An automatic switch 10 with hot-wire sensor is constituted by housing printed circuit boards 42, 44, mounting a hot-wire sensor, a control section for controlling a load based on a sensor signal from the hot-wire sensor, a switch performing ON/OFF control of power supply to the load based on a control signal, and a mode display part for displaying the control mode of the switch, in an enclosure 12. The mode display part includes multiple light-emitting diodes 34a mounted on the first printed circuit board 42, and a light guide member 54 for guiding the light of each light-emitting diode 34a to the outside of the enclosure 12. A cover 16 has multiple display holes for exposing the tip of the light guide member 54 to the outside of the enclosure 12, and a support protrusion 53 into which the light guide member 54 is inserted, and extending from the display hole and abutting on the first printed circuit board 42.SELECTED DRAWING: Figure 6

Description

  The present disclosure relates to an automatic switch with a heat ray sensor that controls on / off of a load such as a lighting device.

  2. Description of the Related Art Conventionally, an automatic switch with a heat ray sensor that controls on / off of a load such as a lighting device by detecting a person with a heat ray sensor is known. For example, in Patent Document 1, when a person is detected by a heat ray sensor, the heating fan starts to be driven simultaneously with the start of lighting of the lighting device, or the driving of the ventilation fan is started at the timing when the lighting device is turned off. An automatic switch with sensor is described.

  The automatic switch with a heat ray sensor described in Patent Document 1 has a continuous lighting mode, an automatic lighting off mode, and a forced lighting off mode. The continuous lighting mode is a mode in which the lighting device is continuously lit regardless of the presence or absence of a sensor signal. The automatic lighting / off mode is a mode in which the lighting device is automatically turned on in accordance with a sensor signal, and the lighting device is turned off after a predetermined lighting holding time has elapsed. The forced turn-off mode is a mode for forcibly turning off the lighting device regardless of the presence or absence of a sensor signal. The automatic switch with a heat ray sensor is configured to display in the mode display section which mode is currently switched to the continuous lighting mode, automatic lighting off mode, and forced lighting mode in turn every time the operation switch is operated. .

JP, 2015-173077, A

  The mode display unit of the automatic switch with a heat ray sensor of Patent Document 1 includes three light emitting diodes mounted on a printed circuit board housed in a casing constituted by a case and a cover. By turning on one of these light emitting diodes, the current mode is displayed. Three cylindrical protrusions are provided on the cover of the housing corresponding to each light emitting diode. Accordingly, it is described that the light of the light emitting diode can be efficiently emitted to the outside of the housing through the internal space of the cylindrical protrusion.

  In this case, it is preferable to improve the visibility of the mode display for the user by enabling the light emitted from the light emitting diode to be efficiently emitted from the outside of the housing. Moreover, it is preferable that the cover of the container is assembled in a stable state with respect to the printed circuit board housed in the housing.

  An object of the present disclosure is to provide an automatic switch with a heat ray sensor that can improve the visibility of a mode display for a user and can assemble a cover in a more stable state with respect to a printed circuit board housed in a housing. It is to provide.

  An automatic switch with a heat ray sensor according to the present disclosure includes a heat ray sensor unit that detects a heat ray emitted from a human body, and a control unit that outputs a control signal for controlling on / off of a load based on a sensor signal from the heat ray sensor unit A printed circuit board on which a switch that controls on / off of power supply to the load based on the control signal and a mode display unit that displays an on / off control mode of the switch are mounted on a case and It is configured to be housed in a casing made of a cover. The mode display unit includes a plurality of light emitting elements mounted on the printed circuit board, and a light guide member for guiding light of each light emitting element to the outside of the casing. The cover includes a plurality of display holes for exposing the front end portion of the light guide member to the outside of the housing, and the light guide member is inserted and extends from the display hole to the printed circuit board so as to contact the printed circuit board. And a support protrusion in contact therewith.

  According to the automatic switch with a heat ray sensor according to the present disclosure, the visibility of the mode display for the user can be improved, and the cover can be assembled in a more stable state with respect to the printed circuit board housed in the housing. it can.

It is a whole perspective view of an automatic switch with a heat ray sensor of one embodiment. It is a functional block diagram of an automatic switch with a heat ray sensor of one embodiment. It is a perspective view in the state which decomposed | disassembled the front part of the automatic switch with a heat ray sensor of one Embodiment. It is a perspective view shown in the state which decomposed | disassembled the rear part of the automatic switch with a heat ray sensor of one Embodiment. It is a front view of the automatic switch with a heat ray sensor of one embodiment. It is the sectional view on the AA line in FIG. It is an expansion perspective view which shows a light guide member and the insertion part of this light guide member. (A) is a top view of a light guide member, (b) is a front view of a light guide member. It is a perspective view which shows the back surface side of a cover.

  Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. Further, in the following, the term “substantially” is used, for example, in the meaning including the case where it can be considered substantially the same in addition to the case where it is completely the same. Furthermore, when a plurality of embodiments and modified examples are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  Hereinafter, an automatic switch with a heat ray sensor (hereinafter simply referred to as an “automatic switch”) 10 according to the present embodiment will be described with reference to FIGS. 1 to 9. In addition, in the figure, the same number is attached | subjected with respect to the same member, and the overlapping description is abbreviate | omitted.

  FIG. 1 is an overall perspective view of an automatic switch 10 according to an embodiment. As shown in FIG. 1, the automatic switch 10 with a heat ray sensor is attached by a mounting frame 2 to a construction surface (not shown) such as a wall surface of a building. The mounting frame 2 is formed in a sheet metal frame, for example, and the automatic switch 10 is mounted in a state of being inserted into the rectangular opening 3 of the mounting frame 2.

  A plurality of engagement holes 5 are formed in the support walls 4 a and 4 b on both sides in the short direction forming the opening 3 of the mounting frame 2, and these engagement holes 5 are formed on the side surface of the housing 12 of the automatic switch 10. The automatic switch 10 is fixed to the mounting frame 2 by fitting the engaged protrusions. Hereinafter, the side of the automatic switch 10 that is exposed on the construction surface is referred to as “front”, and the opposite side is referred to as “rear”.

  As shown in FIG. 1, the automatic switch 10 includes a housing 12 at the rear part thereof. The housing 12 includes a bottomed case 14 having a rectangular parallelepiped shape and a cover 16 provided to cover an opening in front of the case 14. A handle member 18, a decorative cover member 20, a decorative surface plate 22, and the like are attached to the cover 16. Details of these will be described later with reference to FIG.

  FIG. 2 is a functional block diagram of the automatic switch 10. As shown in FIG. 2, the automatic switch 10 of the present embodiment includes a heat ray sensor unit 24 that detects a heat ray emitted from a human body and an input discriminating unit that discriminates an on / off operation of an operation switch 26 that is manually operated. 28. The automatic switch 10 includes a control unit 30 that outputs a control signal for controlling lighting / extinguishing of the lighting device L based on a sensor signal from the heat ray sensor unit 24 and a determination signal from the input determination unit 28. The automatic switch 10 includes a switch 32 that turns on and off the supply of power to the lighting device L based on a control signal from the control unit 30. In the automatic switch 10, the mode is switched every time the operation switch 26 is operated, and the mode is displayed on the mode display unit 34.

  The control unit 30 of the automatic switch 10 controls the switch 32 so that the lighting device L is turned on in accordance with the sensor signal from the heat ray sensor unit 24 and is turned off after a predetermined lighting holding time has elapsed. Can do. In this case, the mode display 34 of the automatic switch 10 displays the automatic lighting / extinguishing mode.

  The automatic switch 10 includes a setting operation unit 36 that can set the detection sensitivity of the heat ray sensor unit 24. The heat ray sensor unit 24 can be configured using an infrared sensor that can detect the presence or absence of a human body by detecting infrared energy as a heat ray emitted from the human body. A pyroelectric element can be used for the infrared sensor.

  The setting operation unit 36 can set the detection sensitivity of the heat ray sensor unit 24. The setting operation unit 36 is not limited to one that can set the detection sensitivity of the heat ray sensor unit 24. The setting operation unit 36 may include an operation unit that can set the lighting holding time in the automatic lighting / off mode. Further, the setting operation unit 36 exposes a part of the setting operation unit 36 on the front surface of the housing 12.

  The control unit 30 of the automatic switch 10 can be configured by, for example, a microcomputer. The control unit 30 outputs a control signal for controlling lighting / extinguishing of the lighting device L to the switch 32 based on the sensor signal from the heat ray sensor unit 24 and the determination signal from the input determination unit 28.

  The automatic switch 10 turns on and off the supply of power to the lighting device L based on a control signal from the control unit 30 by the switch 32. The switch 32 includes an opening / closing element 32a and an opening / closing drive unit 32b. The control unit 30 controls an open / close element 32a such as a bidirectional thyristor that connects two complementary thyristors in antiparallel so that they can be turned on / off via an open / close drive unit 32b.

  The automatic switch 10 includes a DC stabilized power supply 38 that receives a commercial power supply AC and generates a DC constant voltage. The DC stabilized power supply 38 is electrically connected to the commercial power supply AC via the power supply terminals 11a and 11b of the automatic switch 10. The switch 32 is electrically connected between the power supply terminal 11a that connects the commercial power supply AC and the load terminal 11d that connects the lighting device L. The automatic switch 10 is electrically connected to the lighting device L via load terminals 11c and 11d.

  In the automatic switch 10, the sensor signal from the heat ray sensor unit 24 and the determination signal from the input determination unit 28 are input to the control unit 30. In the control unit 30, the output of the heat ray sensor unit 24 that is a sensor signal from the heat ray sensor unit 24 is A / D converted and input. The control unit 30 receives the output of the input determination unit 28 after A / D conversion. The control unit 30 can detect the presence or absence of a human body in a preset detection area based on the sensor signal from the heat ray sensor unit 24 and output a control signal for controlling the switch 32.

  The automatic switch 10 preferably includes a brightness sensor 29 that can identify ambient brightness. The brightness sensor 29 can be configured using, for example, a light receiving element such as CdS or a photodiode. The brightness sensor 29 is electrically connected to the control unit 30. The brightness sensor 29 may be configured integrally with the heat ray sensor unit 24.

  The automatic switch 10 includes a mode display unit 34 that displays the operation mode of the control unit 30. The mode display unit 34 can be configured by a plurality (three in this embodiment) of light emitting diodes 34a (see FIG. 4). The control unit 30 is electrically connected to each light emitting diode 34 a of the mode display unit 34. The control unit 30 changes the mode every time the operation switch 26 is operated. The control unit 30 displays the changed mode on the mode display unit 34 every time the operation switch 26 is operated.

  When the control unit 30 determines that a human body is present in the detection area of the heat ray sensor unit 24 in the automatic light on / off mode, the control unit 30 turns on the lighting device L according to the sensor signal from the heat ray sensor unit 24 and maintains the predetermined lighting state. Turn off after time. The control unit 30 has a built-in timer unit (not shown) for measuring the lighting holding time during which the lighting device L is lit. When the sensor signal is re-input from the heat ray sensor unit 24 while the lighting holding time is being measured, the control unit 30 turns off the lighting device L after a predetermined lighting holding time from the time when the sensor signal is input again. It is configured. Therefore, the timer unit constitutes a retriggerable timer so that a predetermined lighting holding time can be measured from the time when the sensor signal is re-input.

  As a basic operation of the control unit 30, the control unit 30 changes the heat rays incident on the heat ray sensor unit 24 in a state where the brightness detected by the brightness sensor 29 is darker than a preset brightness threshold. If a human body is detected based on this, the lighting device L is turned on. The control unit 30 controls the switch 32 to maintain the lighting state of the lighting device L for a predetermined lighting holding time counted by the timer unit. The automatic switch 10 can also control the power supplied to the lighting device L by the control unit 30 to light the lighting device L with a desired light output.

  Next, the hardware configuration of the automatic switch 10 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the front part of the automatic switch 10 in an exploded state. FIG. 4 is a perspective view showing a state in which the rear part of the automatic switch 10 is disassembled.

  As shown in FIGS. 3 and 4, the housing 12 of the automatic switch 10 includes a case 14 and a cover 16. The case 14 and the cover 16 are configured to be separable. The housing 12 has a rectangular parallelepiped shape, and includes a bottomed rectangular tube case 14 and a bottomed rectangular tube cover 16. The case 14 and the cover 16 constitute a box-like body having a hollow inside by fitting the case 14 and the cover 16 together.

  The case 14 is made of an electrically insulating resin material. The case 14 can be formed using, for example, urea resin as an electrically insulating resin material. The case 14 can be formed, for example, as an integrally molded product by injection molding in which an electrically insulating resin material that has been heated and melted is injected and injected into a mold and cooled and solidified.

  The cover 16 is made of an electrically insulating resin material. The cover 16 can be formed using, for example, urea resin as an electrically insulating resin material. The cover 16 can be formed, for example, as an integrally molded product by injection molding in which a heat-melted electrically insulating resin material is injected and injected into a mold and cooled and solidified.

  The cover 16 includes a pair of protruding pieces 16a that protrude toward the case 14 along the horizontal direction on the upper and lower sides of the cover 16 (up and down sides of the paper surface of FIG. 4). The protruding piece 16a is configured to be elastically deformable with respect to the cylindrical portion of the bottomed square cylindrical cover 16. The cover 16 can be formed by integrally molding the cylindrical portion and the protruding piece 16a. The protruding piece 16a has a C-shaped outer shape, and has a rectangular engagement hole 16b at a portion protruding from the tubular portion and exposed to the outside. The cover 16 is configured such that the engagement hole 16b of the protruding piece 16a and the engagement protrusion 14a of the case 14 can be engaged.

  The cover 16 can position and fix the cover 16 to the case 14 by engaging the engagement protrusion 14a of the case 14 and the engagement hole 16b corresponding to the engagement protrusion 14a. That is, the housing 12 is configured by fitting the case 14 and the cover 16 together. The cover 16 includes mounting claws 17 a that protrude from the side wall 17 on the side wall 17 in the lateral direction. The cover 16 can engage the engagement hole 5 (see FIG. 1) of the attachment frame 2 and the attachment claw 17a.

  A circuit unit 40 is accommodated in the housing 12 including the case 14 and the cover 16. The circuit unit 40 is sandwiched between the case 14 and the cover 16 and is fixed in the housing 12. The circuit unit 40 includes a first printed circuit board 42 and a second printed circuit board 44 that are electrically connected to each other. In the present embodiment, the first printed circuit board 42 is disposed on the front side, and the second printed circuit board 44 is disposed on the rear side.

  On the first printed circuit board 42, two adjustment knobs 46a and 46b, a plurality (three in this embodiment) of light emitting diodes 34a, a switch body 48, and a heat ray sensor unit 24 are mounted. The two adjustment knobs 46a and 46b constitute the setting operation unit 36 described with reference to FIG.

  One adjustment knob 46a is capable of setting a lighting holding time for turning on the lighting device L in the automatic lighting on / off mode. By adjusting the adjustment knob 46a, the automatic switch 10 can appropriately set the lighting holding time in a range from 10 seconds to 30 minutes, for example.

  The other adjustment knob 46b can set the brightness detection level of the brightness sensor 29 in a range from “dark” (for example, 5 lx or less) to “bright” (for example, 100 lx or more), for example. For example, the automatic switch 10 can stop the function of the brightness sensor 29 when the adjustment knob 46b is set to “OFF”. When the adjustment knob 46b is set to “OFF”, the automatic switch 10 can prevent the lighting device L in the house from being lit when the surroundings of the automatic switch 10 are bright. The automatic switch 10 can prevent the lighting device L in the house from being lit when the surroundings are bright, and can save energy.

  For example, the automatic switch 10 adjusts the brightness threshold with the adjustment knob 46b, and as a result, the detection sensitivity for detecting whether or not the heat ray sensor unit 24 is present is set. An effect can be obtained. That is, in the automatic switch 10, the adjustment knob 46 b configures the setting operation unit 36 that sets the detection sensitivity of the heat ray sensor unit 24. The automatic switch 10 may include a setting operation unit 36 that directly adjusts and sets the detection sensitivity of the heat ray sensor unit 24.

  The plurality of light emitting diodes 34a mounted on the first printed circuit board 42 constitute a part of the mode display unit 34 that can display the mode of the automatic switch 10 depending on, for example, the color and the lighting state. The automatic switch 10 can be driven in a continuous lighting mode in which the lighting device L is continuously lit. Further, the automatic switch 10 can be driven in an automatic lighting / extinguishing mode in which the lighting device L is turned on in accordance with a sensor signal from the heat ray sensor unit 24 and is turned off after a predetermined lighting holding time has elapsed. Furthermore, the automatic switch 10 can be driven in a forced light-off mode in which the lighting device L is turned off. In the automatic switch 10, the control unit 30 pushes and operates the operation element 49 of the switch body 48 mounted on the first printed circuit board 42 via the handle member 18, so that the continuous lighting mode and the automatic lighting / off mode are selected. And the forced light-off mode can be switched.

  As the operation switch 26, for example, a position holding type switch that is turned on and off every time the operation element 49 of the switch body 48 is pressed can be used. As the position holding type switch, a push lock switch, a push-on / push-off switch, or the like can be used. The operating element 49 returns to the original position when the pressing operation of the handle member 18 described later is released. Thereby, the operation switch 26 is turned off.

  The control unit 30 is electrically connected to each of the plurality of light emitting diodes 34a. The control unit 30 controls lighting of the plurality of light emitting diodes 34a individually corresponding to each mode. The mode display unit 34 can display each mode separately by light emission from the light emitting diode 34a corresponding to each mode. More specifically, when the automatic switch 10 is in the forced extinction mode in which the power supply to the lighting device L is stopped and the lighting device L is turned off, for example, one of the three light emitting diodes 34a in the horizontal direction (see FIG. 4). The light emitting diode 34a provided on the left side of the drawing is turned on. For example, the automatic switch 10 may light a red light emitting diode 34a provided on one side in the horizontal direction among the three light emitting diodes 34a.

  When the automatic switch 10 is in the automatic on / off mode, for example, the light emitting diode 34a provided at the center in the horizontal direction is turned on. For example, among the three light emitting diodes 34a, the automatic switch 10 may turn on the light emitting diode 34a provided at the center in the horizontal direction in green. The automatic switch 10 may blink the light emitting diode 34a provided in the center portion in green for a predetermined lighting holding time. The automatic switch 10 may shorten the blinking interval of the light emitting diodes 34a provided in the center as the remaining time of the predetermined lighting holding time decreases. In the continuous lighting mode in which the lighting device L is continuously lit, the automatic switch 10 includes, for example, a light emitting diode 34a provided on the other side in the horizontal direction (the right side of the paper in FIG. 4) among the three light emitting diodes 34a. Light. For example, the automatic switch 10 may turn on the light emitting diode 34a on the other side in the lateral direction of the three light emitting diodes 34a in blue.

  The heat ray sensor unit 24 mounted on the first printed circuit board 42 includes, for example, a sensor element 24a such as a pyroelectric element, and can detect heat rays from a human body existing in a preset detection area. The sensor element 24 a of the heat ray sensor unit 24 is covered with a sensor cover 25. The sensor cover 25 has a semi-cylindrical outer shape. In the heat ray sensor unit 24, the sensor element 24 a detects the heat ray emitted from the human body via the sensor cover 25. The sensor cover 25 may constitute a Fresnel lens that collects infrared rays. In the automatic switch 10, the sensor cover 25 is sandwiched between the cover 16 of the housing 12 and the circuit unit 40 and housed in the housing 12.

  The automatic switch 10 includes a pair of shutters 25 a and 25 b between the cover 16 and the sensor cover 25 of the housing 12. Each of the shutters 25 a and 25 b has an arc shape and is configured to be movable along the surface of the sensor cover 25. Each shutter 25 a and 25 b can cover a part of the sensor cover 25. By moving the shutters 25a and 25b, it is possible to adjust the detection area in which the heat ray sensor unit 24 detects a human body. The automatic switch 10 can adjust the detection area of the heat ray sensor unit 24 to optimize the detection area of the human body.

  Electronic components for configuring the control unit 30 and the input determination unit 28 are mounted on the first printed circuit board 42 constituting the circuit unit 40. For example, the first printed circuit board 42 may be mounted with various electronic components such as a fuse, a temperature fuse for suppressing abnormal heat generation, and a relay for preventing leakage. The first printed circuit board 42 is mounted with electronic components such as a light emitting diode 34a, a capacitor, a resistor, and a relay. A wiring pattern (not shown) is formed on the first printed circuit board 42 so that it can be electrically connected to various electronic components.

  Similar to the first printed circuit board 42, the second printed circuit board 44 constituting the circuit unit 40 has a rectangular shape in plan view, and various electronic components are mounted thereon. As the switch 32, the second printed circuit board 44 is mounted with an open / close element 32a constituting a main switch element and an open / close drive unit 32b for controlling the drive of the open / close element 32a. The second printed circuit board 44 may be mounted with a DC stabilized power supply 38. The second printed circuit board 44 is electrically connected to the first printed circuit board 42 by the connector 43 (see FIG. 6).

  As shown in FIG. 4, the cover 16 has two through holes 50a and 50b. The two through holes 50 a and 50 b expose the two adjustment knobs 46 a and 46 b included in the circuit unit 40 to the front surface of the housing 12 when the cover 16 is assembled to the case 14. Thus, by removing the decorative face plate 22 and the decorative cover member 20 provided at the front portion of the automatic switch 10, the two adjustment knobs 46a and 46b protruding forward through the two through holes 50a and 50b are rotated. can do.

  The cover 16 has a light guide member insertion portion 52 below the two through holes 50a and 50b. The light guide member 54 including a plurality (three in the present embodiment) of light guide pieces 54 a is inserted into the light guide member insertion portion 52. The light guide member insertion portion 52 is formed at a position corresponding to the plurality of light emitting diodes 34 a mounted on the first printed circuit board 42. The light guide member insertion portion 52 and the light guide member 54 will be described later with reference to FIG.

  The cover 16 has a flexure piece 56. The bending piece 56 includes a base portion 56a connected to the front surface of the cover 16 in a cantilevered manner, and a tip portion 56b extending in the vertical direction so as to form a substantially T shape with respect to the base portion 56a. Projecting toward the switch body 48 mounted on the first printed circuit board 42. The bending piece 56 can be bent in a swingable manner by elastic deformation of the base portion 56a. Therefore, when a handle member 18 described later is pushed, the tip 56b of the bending piece 56 of the cover 16 is bent rearward and the operator 49 of the switch body 48 is pushed. As a result, as described above, the automatic switch 10 can be sequentially switched to the continuous lighting mode, the automatic lighting off mode, and the forced lighting off mode.

  The cover 16 has a protruding portion 58 that protrudes forward in a semicircular arc shape. The protrusion 58 is formed with an opening 60 having a substantially rectangular shape when viewed from the front. The sensor cover 25 that covers the heat ray sensor unit 24 is exposed through the opening 60.

  A leaf spring 62 is attached to the cover 16 on the side of the protruding portion 58. The leaf spring 62 is for applying an urging force for restoring the handle member 18 to its original position when a handle member 18 (described later) attached to the cover 16 is pushed.

  As shown in FIG. 3, the automatic switch 10 includes a handle member 18 constituting an operation switch 26 at the front portion thereof. The handle member 18 is constituted by, for example, a resin molded part. The handle member 18 is a piano handle in which one side end portion 18a in the lateral direction is supported on the housing 12 side and the other end portion 18b can be pushed and swung. That is, the handle member 18 constitutes a piano handle type switch. The piano handle type switch can press the bending piece 56 of the cover 16 by pressing and rotating the other side end 18b with the one side end 18a as a fulcrum. As a result, the bending piece 56 is bent rearward and the operation element 49 of the switch body 48 constituting the operation switch 26 can be pressed.

  The handle member 18 has a substantially square opening 64 in a front view. In a state where the handle member 18 is assembled to the housing 12, the two adjustment knobs 46 a and 46 b constituting the setting operation unit 36 and the light guide member 54 constituting the mode display unit 34 are exposed through the opening 64. It has a configuration.

  The handle member 18 has a cover portion 66 protruding forward at the lower portion thereof. The cover part 66 protrudes forward in a substantially arc shape when viewed from above. A substantially rectangular opening 68 is formed in the center of the cover 66 in front view. In a state where the handle member 18 is assembled, the sensor cover 25 provided so as to cover the heat ray sensor unit 24 is exposed through the opening 68.

  A decorative cover member 20 is attached to the handle member 18. The decorative cover member 20 is attached so as to close the opening 64 of the handle member 18. The decorative cover member 20 is constituted by a resin molded part, for example. Four protrusions (not shown) protrude from the back surface of the decorative cover member 20. By fitting these projections into an engaging recess 70 that is recessed around the opening 64 of the handle member 18, the decorative cover member 20 is detachably attached to the handle member 18.

  A plurality (three in this embodiment) of light transmitting holes 72 are formed in the decorative cover member 20. Further, between the handle member 18 and the decorative cover member 20, for example, a translucent plate 19 made of a translucent resin plate is sandwiched and disposed between the both members 18 and 20. The light transmitting plate 19 is provided to face the light guide member 54 attached to the housing 12 and to face the plurality of light transmitting holes 72 of the decorative cover member 20.

  The decorative cover member 20 includes a protruding portion 74 that protrudes in an arc shape in a top view at a lower portion thereof. When the decorative cover member 20 is attached to the handle member 18, the protruding portion 74 is disposed on the cover portion 66. The protrusion 74 has a mounting hole 76 formed at the center.

  A decorative surface plate 22 is detachably attached to the front surface of the decorative cover member 20. The decorative surface plate 22 is made of a resin plate having translucency, for example. The decorative surface plate 22 includes a main body 80 that is rectangular in a front view and an attachment piece 82 that protrudes from the lower edge of the main body 80. The decorative surface plate 22 is fitted and attached to a shallow rectangular recess 78 formed on the front surface of the decorative cover member 20 in a state in which the attachment piece 82 is inserted into the attachment hole 76 of the decorative cover member 20.

  As described above, in the automatic switch 10 of this embodiment, the translucent plate 19, the decorative cover member 20, and the decorative surface plate 22 are integrally assembled with the handle member 18, and are configured to be swingable together with the handle member 18. . Further, by removing the decorative cover member 20 and the decorative surface plate 22 together from the handle member 18, the two adjustment knobs 46 a and 46 b constituting the setting operation unit 36 are exposed through the opening 64 of the handle member 18. State. Thereby, the turning operation of the adjustment knobs 46a and 46b can be performed, and the lighting holding time of the illumination device L and the detection threshold value by the brightness sensor 29 can be adjusted.

  In addition, in a state where the light transmitting plate 19, the decorative surface plate 22, and the decorative surface plate 22 are attached to the handle member 18, the opening 64 of the handle member 18, the light transmitting plate 19, and the light transmitting holes of the decorative cover member 20. 72 is disposed to face the light guide member 54 provided in the housing 12. Thereby, the light of the light emitting diode 34a on the first printed circuit board 42 accommodated in the housing 12 is emitted to the outside through the light guide member 54, the translucent plate 19, the translucent hole 72, and the decorative surface plate 22. It is configured to be.

  FIG. 5 is a front view of the automatic switch 10. 6 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 5, “cut”, “automatic”, and “continuous input” are displayed on the front surface of the decorative surface plate 22 in order from the left side of the drawing. The indication of “off” is attached to the upper side of the position corresponding to the left light transmitting hole 72 among the plurality of light transmitting holes 72 of the decorative cover member 20.

  The indication “automatic” is given to the upper part of the position corresponding to the central light transmitting hole 72 among the plurality of light transmitting holes 72 of the decorative cover member 20. The indication of “continuous input” is given to the upper part of the position corresponding to the right light transmitting hole 72 among the plurality of light transmitting holes 72 of the decorative cover member 20. The display of “OFF” is for indicating that the automatic switch 10 is in the forced extinction mode. The “automatic” display is used to indicate that the automatic switch 10 is in the automatic on / off mode. The “continuous on” display is used to indicate that the automatic switch 10 is in the continuous lighting mode.

  By pressing the handle member 18 from the front surface of the automatic switch 10, the control unit 30 of the automatic switch 10 sequentially switches to the forced-off mode, the automatic on / off mode, and the continuous lighting mode. When the automatic switch 10 is in the forced extinction mode, the light emitting diode 34a located on the left side in FIG. 4 on the first printed circuit board 42 is lit, and a light transmitting hole corresponding to the display of “OFF” is displayed on the front surface of the automatic switch 10. 72 is turned on. When the automatic switch 10 is in the automatic on / off mode, the light emitting diode 34a located in the center of FIG. 4 on the first printed circuit board 42 is lit, and the front surface of the automatic switch 10 corresponds to the light transmission corresponding to “automatic”. The hole 72 is turned on. When the automatic switch 10 is in the continuous lighting mode, the light emitting diode 34a located on the right side in FIG. The hole 72 is turned on.

  As described above, as described above, the light guide member 54 is attached to the light guide member insertion portion 52 of the cover 16. The light guide member 54 includes a plurality of light guide pieces 54a for guiding light of the light emitting diodes 34a mounted on the first printed circuit board 42, and a connecting portion 54b for connecting the light guide pieces 54a. The light guide member 54 is integrally formed of, for example, a transparent resin material.

  Each light guide piece 54 a is formed to extend from the exposed front end portion of the front surface of the cover 16 to the base end portion facing the light emitting diode 34 a mounted on the first printed circuit board 42. Accordingly, each light guide piece 54a of the light guide member 54 can efficiently guide the light of the corresponding light emitting diode 34a from the base end portion to the tip end portion.

  Each light guide piece 54a is inserted and attached into a cylindrical support projection 53 formed in the light guide member insertion portion 52 of the cover 16. In the present embodiment, three support protrusions 53 are formed corresponding to the three light guide pieces 54a. The support protrusion 53 is formed integrally with the cover 16 made of a light shielding resin material. Therefore, the light emitted from the light emitting diode 34a is efficiently guided without leaking from the proximal end portion to the distal end portion of each light guide piece 54a.

  FIG. 7 is an enlarged perspective view showing the light guide member 54 and the light guide member insertion portion 52. FIG. 8A is a plan view of the light guide member 54, and FIG. 8B is a front view of the light guide member 54. FIG. 9 is a perspective view showing the back side of the cover 16.

  As shown in FIG. 7, the light guide member insertion portion 52 of the cover 16 is formed with three openings that communicate with the internal space of the support protrusion 53 that protrudes on the back surface side of the cover 16. These openings serve as a plurality of display holes for exposing the front end portion 57 a of the light guide member 54 to the outside of the housing 12. Around these openings, a flat rectangular peripheral frame 55 extending in the horizontal direction when viewed from the front is erected on the front surface of the cover 16. The peripheral frame 55 is formed in a size that can be accommodated in a state of surrounding the distal end portions of the three light guide pieces 54a and the connecting portion 54b that connects them.

  The light guide member 54 is assembled to the cover 16 by inserting three light guide pieces 54 a into the support protrusions 53. At this time, since each light guide piece 54a is connected by the connecting portion 54b, the light guide member 54 can be easily assembled. Further, the front end portion of each light guide piece 54 a of the light guide member 54 assembled to the cover 16 and the connection portion 54 b are accommodated in the peripheral frame 55. Thereby, the light guide member 54 assembled to the cover 16 is stably held.

  As shown in FIGS. 8A and 8B, each light guide piece 54 a of the light guide member 54 is formed by extending the base end portion 57 b inserted in the support protrusion 53 and the vicinity thereof into a rectangular parallelepiped shape. ing. The distal end portion 57a of each light guide piece 54a is formed slightly larger than the proximal end portion 57b, and a stepped portion 57c is formed therebetween.

  In the light guide member 54, the connecting portion 54b is connected to the light guide piece 54a in the vicinity of the tip portion 57a of each light guide piece 54a. Thus, the connection part 54b is connected in the vicinity of the front end part 57a, and the following advantages are obtained. That is, as the connecting portion is connected to a position closer to the base end portion 57b of each light guide piece 54a, the light that has entered the light guide piece 54a from the base end portion 57b is adjacent to another light guide via the connecting portion. It becomes easy to leak into the piece 54a. As a result, when the automatic switch 10 is viewed from the front, it becomes difficult to visually recognize which mode is switched by the mode display unit 34. On the other hand, in this embodiment, since the connection part 54b is connected in the vicinity of the front-end | tip part 57a of each light guide piece 54a, it can suppress leaking to the adjacent light guide piece 54a via the connection part 54b. The visibility of the mode display unit 34 is improved.

  Furthermore, as shown to Fig.8 (a), the front-end | tip part 57a of each light guide piece 54a has the front end surface which curved and protruded so that a part of spherical surface might be made. As a result, refraction occurs when light incident from the base end portion 57b of each light guide piece 54a is emitted from the front end portion 57a, so that it has an angular spread compared to the case where the front end surface is a flat surface. Light is emitted from the tip surface. As a result, it becomes easy to visually recognize the lighting state of each light emitting diode 34a even from a position slightly deviated from the front of the automatic switch 10, and this also improves the visibility of the mode display unit 34.

  As shown in FIG. 9, the support protrusions 53 that support the light guide pieces 54 a of the light guide member 54 in a state in which the light guide pieces 54 are accommodated are formed so as to protrude from the back surface of the cover 16 toward the inside of the housing 12. Among them, the support protrusion 53 located at the center of the three support protrusions 53 extends longer than the support protrusions 53 on both sides thereof and protrudes. Thus, as shown in FIG. 6, when the cover 16 is assembled to the case 14 housing the circuit unit 40, the central support protrusion 53 is located around the central light emitting diode 34a among the three light emitting diodes 34a. It abuts on the first printed circuit board 42. As a result, the connector 43 provided on the first printed circuit board 42 is pressed between the second printed circuit board 44 at a position corresponding to the central light emitting diode 34a, and the first and second printed circuit boards 42, 44 are pressed. The electrical connection between them can be made more reliable.

  As described above, the automatic switch 10 according to the present embodiment includes the heat ray sensor unit 24 that detects the heat rays emitted from the human body and the control signal that controls the load on / off based on the sensor signal from the heat ray sensor unit 24. A control unit 30 for outputting, a switch 32 for controlling on / off of power supply to the load based on a control signal, and a mode display unit 34 for displaying a mode of on / off control of the switch 32 are mounted. The printed circuit boards 42 and 44 are configured to be housed in the housing 12 including the case 14 and the cover 16. The mode display unit 34 includes a plurality of light emitting diodes 34 a mounted on the first printed circuit board 42, and a light guide member 54 for guiding the light of each light emitting diode 34 a to the outside of the housing 12. . The cover 16 has a plurality of display holes for exposing the front end portion 57a of the light guide member 54 to the outside of the housing 12, and the light guide member 54 is inserted and extends from the display hole to the first printed circuit board 42. And a support protrusion 53 that contacts the first printed circuit board 42. According to this configuration, the visibility of the mode display for the user can be improved, and the cover 16 can be assembled in a more stable state with respect to the printed boards 42 and 44 accommodated in the housing 12. .

  Further, in the automatic switch 10 of the present embodiment, the support protrusions 53 extend from the respective display holes in a cylindrical shape, and one of the plurality of support protrusions 53 is on the surface of the first printed circuit board 42. A connector 43 is provided on the back surface of the first printed circuit board 42 at a position corresponding to one light-emitting diode 34a, in contact with the periphery of one light-emitting diode 34a among the plurality of light-emitting diodes 34a. According to this configuration, the connector 43 is pressed between the second printed circuit board 44 and the electrical connection between the first and second printed circuit boards 42 and 44 can be made more reliable.

  The automatic switch with a heat ray sensor according to the present disclosure is not limited to the above-described embodiment and its modifications, and various improvements can be made within the matters described in the claims of the present application and the equivalent scope thereof. And changes are possible.

  For example, in the above description, the example in which one support protrusion 53 located at the center of the plurality of support protrusions 53 is brought into contact with the first printed circuit board 42 is described, but the present invention is not limited to this. For example, a plurality of support protrusions may be extended so as to contact the first printed circuit board.

DESCRIPTION OF SYMBOLS 10 Automatic switch with a heat ray sensor, 12 Case, 14 Case, 16 Cover, 18 Handle member, 19 Translucent plate, 20 Cosmetic cover member, 22 Cosmetic surface plate, 24 Heat ray sensor part, 25 Sensor cover, 25a, 25b Shutter , 26 operation switch, 28 input determination unit, 29 brightness sensor, 30 control unit, 32 switch, 34 mode display unit, 34a light emitting diode (light emitting element), 36 setting operation unit, 38 DC stabilized power supply, 40 circuit , 42 1st printed circuit board (printed circuit board), 44 2nd printed circuit board (printed circuit board), 43 Connector, 46a, 46b Adjustment knob, 48 Switch body, 49 Operator, 52 Light guide member insertion part, 53 Support protrusion, 54 Light guide member, 54a Light guide piece, 54b Connecting part, 55 Peripheral frame, 56 Deflection piece, 57a Tip part, 57b End, 57c stepped portions, 58 and 74 protrusion, 60, 64, 68 opening, 6 6 cover portion, 72 light-transmitting hole 76 mounting hole, 78 recess, 80 main body, 82 the mounting piece,
AC commercial power, L lighting device.

Claims (2)

A heat ray sensor unit for detecting heat rays emitted from the human body;
A control unit that outputs a control signal for controlling on / off of the load based on a sensor signal from the heat ray sensor unit;
A switch for controlling on / off of power supply to the load based on the control signal;
An automatic switch with a heat ray sensor, in which a printed circuit board on which a mode display unit for displaying an on / off control mode of the switch is mounted is housed in a casing made of a case and a cover,
The mode display unit includes a plurality of light emitting elements mounted on the printed circuit board, and a light guide member for guiding light of each light emitting element to the outside of the housing, respectively.
The cover includes a plurality of display holes for exposing the front end portion of the light guide member to the outside of the housing, and the light guide member is inserted and extends from the display hole to the printed circuit board so as to contact the printed circuit board. An automatic switch with a heat ray sensor, characterized by having a supporting protrusion in contact therewith.   The support protrusion extends in a cylindrical shape from each display hole, and one support protrusion among the plurality of support protrusions contacts the periphery of one of the plurality of light emitting elements on the surface of the printed circuit board. 2. The automatic switch with a heat ray sensor according to claim 1, wherein a connector is provided on a back surface of the printed board at a position corresponding to the one light emitting element.

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