JP6788855B2 - Automatic switch with heat ray sensor - Google Patents

Description

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

Conventionally, an automatic switch with a heat ray sensor that controls the on / off of a load of a lighting device or the like by detecting a person with a heat ray sensor has been known. For example, in Patent Document 1, when a person is detected by a heat ray sensor, the ventilation fan is started to be driven at the same time when the lighting device is turned on, or the ventilation fan is started to be driven when the lighting device is turned off. An automatic switch with a sensor is described.

The automatic switch with a heat ray sensor described in Patent Document 1 has a continuous lighting mode, an automatic lighting / extinguishing mode, and a forced extinguishing 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 / extinguishing mode is a mode in which the lighting device is automatically turned on in response to a sensor signal and the lighting device is turned off after a predetermined lighting holding time has elapsed. The forced off mode is a mode in which the lighting device is forcibly turned off regardless of the presence or absence of a sensor signal. The automatic switch with a heat ray sensor is configured to switch to continuous lighting mode, automatic lighting / extinguishing mode, and forced extinguishing mode in order for each operation of the operation switch, and the mode display unit displays which mode is currently in. ..

Japanese Unexamined Patent Publication No. 2015-173077

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 housing composed of a case and a cover. By lighting any of these light emitting diodes, the current mode is displayed. Three tubular protrusions are provided on the cover of the housing corresponding to each light emitting diode. It is described that this makes it possible to efficiently emit the light of the light emitting diode to the outside of the housing through the internal space of the tubular protrusion.

In this case, it is preferable that the light of the light emitting diode can be emitted more efficiently to the outside of the housing to improve the visibility of the mode display to the user. Further, it is preferable that the cover of the body can be assembled in a stable state with respect to the printed circuit board housed and arranged 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 the mode display to the user and can assemble the cover in a more stable state with respect to the printed circuit board housed and arranged in the housing. To provide.

The automatic switch with a heat ray sensor according to the present disclosure includes a heat ray sensor unit that detects heat rays emitted from a human body and a control unit that outputs a control signal for controlling load on / off based on a sensor signal from the heat ray sensor unit. A case and a printed board on which a switch for controlling power supply to the load on / off based on the control signal and a mode display unit for displaying the on / off control mode of the switch are mounted. It is configured by being stored in a housing consisting 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 the light of each light emitting element to the outside of the housing. The cover has a plurality of display holes for exposing the tip 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 to hit the printed circuit board. It has a support protrusion in contact with it.

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

It is an overall perspective view of the automatic switch with a heat ray sensor of one Embodiment. It is a functional block diagram of the automatic switch with a heat ray sensor of one Embodiment. It is a perspective view which shows the front part of the automatic switch with a heat ray sensor of one Embodiment in the disassembled state. It is a perspective view which shows the rear part of the automatic switch with a heat ray sensor of one Embodiment in the disassembled state. It is a front view of the automatic switch with a heat ray sensor of one Embodiment. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is an enlarged perspective view which shows the light guide member and the insertion part of the light guide member. (A) is a plan view of the light guide member, and (b) is a front view of the 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, etc. are examples for facilitating the understanding of the present invention, and can be appropriately changed according to applications, purposes, specifications, and the like. Further, in the following, the term "abbreviation" is used to mean, for example, not only when they are completely the same but also when they can be regarded as substantially the same. Further, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that those characteristic portions are used in an appropriate combination.

Hereinafter, the automatic switch with a heat ray sensor (hereinafter, appropriately referred to as “automatic switch”) 10 of the present embodiment will be described with reference to FIGS. 1 to 9. In addition, in the figure, the same member is given the same number and duplicate description is omitted.

FIG. 1 is an overall perspective view of the automatic switch 10 of one embodiment. As shown in FIG. 1, the automatic switch 10 with a heat ray sensor is attached to a construction surface (not shown) such as a wall surface of a building by a mounting frame 2. The mounting frame 2 is formed in, for example, a frame made of sheet metal, 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 engaging holes 5 are formed in the support walls 4a and 4b on both sides in the lateral direction forming the opening 3 of the mounting frame 2, and these engaging 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 engaging protrusions. In the following, the side of the automatic switch 10 exposed to the construction surface and arranged 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 portion. The housing 12 is composed of a rectangular parallelepiped bottomed case 14 and a cover 16 provided so as to cover the 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. 3 and the like.

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 has a heat ray sensor unit 24 that detects heat rays emitted from a human body and an input determination unit that determines on / off operation of a manually operated operation switch 26. It has 28 and. 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 discrimination signal from the input discrimination unit 28. The automatic switch 10 includes a switch 32 that turns on / off the supply of electric 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 each 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 turns on the lighting device L in response to a sensor signal from the heat ray sensor unit 24, and controls the switch 32 so that the lighting device L is turned off after a predetermined lighting holding time has elapsed. Can be done. In this case, the mode display unit 34 of the automatic switch 10 displays the automatic lighting / extinguishing mode.

The automatic switch 10 includes a setting operation unit 36 capable of setting the detection sensitivity of the heat ray sensor unit 24. The heat ray sensor unit 24 can be configured by using an infrared sensor that can detect the presence or absence of the human body by detecting infrared energy as the heat rays emitted from the human body. A pyroelectric element can be used as 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 those capable of setting the detection sensitivity of the heat ray sensor unit 24. The setting operation unit 36 may include an operation unit capable of setting the lighting holding time in the automatic lighting / extinguishing mode. Further, the setting operation unit 36 exposes a part of the setting operation unit 36 to the front surface of the housing 12.

The control unit 30 of the automatic switch 10 can be configured by, for example, a microcomputer or the like. 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 discrimination signal from the input discrimination unit 28.

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

The automatic switch 10 includes a DC regulated power supply 38 that receives a commercial power supply AC and generates a DC constant voltage. The regulated DC 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 for connecting the commercial power supply AC and the load terminal 11d for connecting the lighting device L. The automatic switch 10 is electrically connected to the lighting device L via the load terminals 11c and 11d.

In the automatic switch 10, the sensor signal from the heat ray sensor unit 24 and the discrimination signal from the input discrimination unit 28 are input to the control unit 30. In the control unit 30, the output of the heat ray sensor unit 24, which is a sensor signal from the heat ray sensor unit 24, is A / D converted and input. The control unit 30 inputs 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 is preferably provided with a brightness sensor 29 capable of identifying the ambient brightness. The brightness sensor 29 can be configured by using a light receiving element such as a CdS or a photodiode. The brightness sensor 29 is electrically connected to the control unit 30. The brightness sensor 29 may be integrally configured 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 composed of a plurality of (three in this embodiment) light emitting diodes 34a (see FIG. 4). The control unit 30 is electrically connected to each light emitting diode 34a of the mode display unit 34. The control unit 30 shifts the mode each time the operation switch 26 is operated. The control unit 30 displays the transitioned mode on the mode display unit 34 each time the operation switch 26 is operated.

When the control unit 30 determines that a human body exists in the detection area of the heat ray sensor unit 24 in the automatic lighting / extinguishing mode, the control unit 30 turns the lighting device L into a lighting state in response to a sensor signal from the heat ray sensor unit 24 to maintain a predetermined lighting state. Turn off the light after a lapse of time. The control unit 30 has a built-in timer unit (not shown) for measuring the lighting holding time when the lighting device L is lit. When the sensor signal is re-input from the heat ray sensor unit 24 during the timing of the lighting holding time, the control unit 30 turns off the lighting device L after a predetermined lighting holding time from the time when the sensor signal is re-input. It is configured in. Therefore, the timer unit configures a retriggable 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 the preset brightness threshold value. When the human body is detected based on this, the lighting device L is turned on. The control unit 30 controls the switch 32 so as to maintain the lighting state of the lighting device L for a predetermined lighting holding time measured by the timer unit. The automatic switch 10 can also adjust the power supply to the lighting device L by the control unit 30 to light the lighting device L with a desired light output.

Subsequently, 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 a front portion of the automatic switch 10 in a disassembled state. FIG. 4 is a perspective view showing a disassembled rear portion of the automatic switch 10.

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 have a separable configuration. The housing 12 has a rectangular parallelepiped shape, and is composed of a case 14 having a bottomed square tube shape and a cover 16 having a bottomed square tube shape. The case 14 and the cover 16 form a box-like body having a hollow inside by fitting the case 14 and the cover 16.

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

The cover 16 is made of an electrically insulating resin material. The cover 16 can be formed by using, for example, urea resin as the electrically insulating resin material. The cover 16 can be formed as an integrally molded product by, for example, injection molding an electrically insulating resin material that has been heated and melted into a mold and cooling and solidifying the cover 16.

The cover 16 includes a pair of projecting pieces 16a projecting toward the case 14 side along the respective lateral directions on the upper and lower sides of the cover 16 (upper and lower sides of the paper surface of FIG. 4). The projecting piece 16a is configured to be elastically deformable with respect to the tubular portion of the bottomed square tubular cover 16. The cover 16 can be formed by integrally molding the tubular portion and the protruding piece 16a. The protruding piece 16a has a C-shaped outer shape, and has a rectangular engaging hole 16b in a portion protruding from the tubular portion and exposed to the outside. The cover 16 is configured so that the engaging hole 16b of the protruding piece 16a and the engaging protrusion 14a of the case 14 can be engaged with each other.

The cover 16 can position and fix the cover 16 to the case 14 by engaging the engaging protrusions 14a of the case 14 and the engaging holes 16b corresponding to the engaging protrusions 14a, respectively. That is, the housing 12 is configured by fitting the case 14 and the cover 16. The cover 16 is provided with a mounting claw 17a projecting from the side wall 17 on the side wall 17 in the lateral direction. The cover 16 is capable of engaging the engaging hole 5 (see FIG. 1) of the mounting frame 2 with the mounting claw 17a.

The circuit unit 40 is housed 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 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 arranged on the front side, and the second printed circuit board 44 is arranged on the rear side.

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

On the other hand, the adjustment knob 46a can set the lighting holding time for lighting the lighting device L in the automatic lighting / extinguishing mode. By adjusting the adjustment knob 46a, the automatic switch 10 can appropriately set the lighting holding time in the range of, for example, 10 seconds to 30 minutes.

The other adjustment knob 46b can, for example, set the brightness detection level of the brightness sensor 29 in the range from "dark" (for example, 5 lp or less) to "bright" (for example, 100 lp or more). The automatic switch 10 can stop the function of the brightness sensor 29, for example, by setting the adjustment knob 46b 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 turned on when the surroundings of the automatic switch 10 are bright. The automatic switch 10 prevents the lighting device L in the house from being turned on when the surroundings are bright, and can save energy.

The automatic switch 10 is the same as, for example, by adjusting the brightness threshold value with the adjustment knob 46b, and as a result, the detection sensitivity for the heat ray sensor unit 24 to detect the presence or absence of a person is set. The effect can be obtained. That is, in the automatic switch 10, the adjustment knob 46b constitutes a 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 form a part of the mode display unit 34 capable of displaying the mode of the automatic switch 10 depending on, for example, a color or a 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 response to a sensor signal from the heat ray sensor unit 24 and turned off after a predetermined lighting holding time has elapsed. Further, the automatic switch 10 can be driven in the forced extinguishing mode in which the lighting device L is extinguished. In the automatic switch 10, the control unit 30 pushes and operates the operator 49 of the switch body 48 mounted on the first printed circuit board 42 via the handle member 18, thereby performing a continuous lighting mode and an automatic lighting / extinguishing mode. And the forced off mode can be switched.

As the operation switch 26, for example, a position-holding type switch that is turned on and off each time the operator 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. When the operation of pressing the handle member 18, which will be described later, is released, the operator 49 returns to the original position. As a result, 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 the lighting of the plurality of light emitting diodes 34a separately for each mode. The mode display unit 34 can display each mode separately by emitting light from the light emitting diode 34a corresponding to each mode. More specifically, in the case of the forced off mode in which the automatic switch 10 stops supplying power to the lighting device L and turns off the lighting device L, for example, one of the three light emitting diodes 34a in the lateral direction (FIG. 4). The light emitting diode 34a provided on the left side of the paper is lit. For example, the automatic switch 10 may light the light emitting diode 34a provided on one side in the lateral direction in red among the three light emitting diodes 34a.

When the automatic switch 10 is in the automatic lighting / extinguishing mode, for example, the light emitting diode 34a provided at the center in the lateral direction is lit. The automatic switch 10 may, for example, light the light emitting diode 34a provided in the center in the lateral direction in green among the three light emitting diodes 34a. The automatic switch 10 may blink the light emitting diode 34a provided in the central portion in green for a predetermined lighting holding time. The automatic switch 10 may shorten the blinking interval of the light emitting diode 34a provided in the central portion 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, for example, the light emitting diode 34a provided on the other side in the horizontal direction (right side of the paper in FIG. 4) of the three light emitting diodes 34a is used as the automatic switch 10. Light. For example, the automatic switch 10 may light the light emitting diode 34a on the other side of the three light emitting diodes 34a in the short direction 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 24a of the heat ray sensor unit 24 is covered with a sensor cover 25. The outer shape of the sensor cover 25 is semi-cylindrical. The heat ray sensor unit 24 detects the heat ray emitted from the human body by the sensor element 24a via the sensor cover 25. The sensor cover 25 may form a Fresnel lens that collects infrared rays. The automatic switch 10 sandwiches the sensor cover 25 between the cover 16 of the housing 12 and the circuit unit 40 and houses the sensor cover 25 inside the housing 12.

The automatic switch 10 includes a pair of shutters 25a and 25b between the cover 16 of the housing 12 and the sensor cover 25. Each of the shutters 25a and 25b has an arcuate outer shape and is movably configured along the surface of the sensor cover 25. Each of the shutters 25a and 25b can cover a part of the sensor cover 25. By moving the shutters 25a and 25b, the detection area in which the heat ray sensor unit 24 detects the human body can be adjusted. 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 forming the control unit 30 and the input discriminating unit 28 are mounted on the first printed circuit board 42 that constitutes the circuit unit 40. For example, the first printed circuit board 42 may be equipped with various electronic components such as a fuse, a thermal fuse for suppressing abnormal heat generation, and a relay for preventing electric leakage. Further, the first printed circuit board 42 mounts 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.

Like the first printed circuit board 42, the second printed circuit board 44 constituting the circuit unit 40 has a rectangular shape in a plan view, and various electronic components are mounted therein. On the second printed circuit board 44, as the switch 32, an opening / closing element 32a constituting a main switch element and an opening / closing drive unit 32b for controlling the drive of the opening / closing element 32a are mounted. The second printed circuit board 44 may mount the regulated DC 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 50a and 50b expose the two adjustment knobs 46a and 46b included in the circuit unit 40 to the front surface of the housing 12 when the cover 16 is assembled to the case 14. As a result, by removing the decorative surface plate 22 and the decorative cover member 20 provided on the front portion of the automatic switch 10, the two adjusting 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. A light guide member 54 having a plurality of (three in this embodiment) light guide pieces 54a is inserted into the light guide member insertion portion 52. The light guide member insertion portion 52 is formed at a position corresponding to a plurality of light emitting diodes 34a 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. 6 and the like.

The cover 16 has a flexible piece 56. The flexible piece 56 includes a base portion 56a that is cantileveredly connected to the front surface of the cover 16 and a tip portion 56b that extends in the vertical direction so as to form a substantially T shape with respect to the base portion 56a. It projects toward the switch body 48 mounted on the first printed circuit board 42. The flexible piece 56 can be oscillated by elastic deformation of the base portion 56a. Therefore, when the handle member 18 described later is pushed, the tip portion 56b of the flexible piece 56 of the cover 16 is bent and deformed 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 between the continuous lighting mode, the automatic lighting / extinguishing mode, and the forced extinguishing mode.

The cover 16 has a protruding portion 58 that protrudes forward in a semicircular shape. The protruding portion 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 protrusion 58. The leaf spring 62 is for exerting an urging force for restoring the handle member 18 to the original position when the handle member 18 attached to the cover 16 is pushed and operated.

As shown in FIG. 3, the automatic switch 10 is provided with a handle member 18 constituting the operation switch 26 at the front portion thereof. The handle member 18 is composed of, for example, a resin molded part. The handle member 18 is a piano handle in which one side end 18a in the lateral direction is supported on the housing 12 side and the other end 18b is swingably pushable. That is, the handle member 18 constitutes a piano handle type switch. In the piano handle type switch, the flexible piece 56 of the cover 16 can be pressed and rotated by pressing and rotating the other side end 18b with one side end 18a as a fulcrum. As a result, the flexible piece 56 is flexed and deformed rearward, and the operator 49 of the switch body 48 constituting the operation switch 26 can be pressed.

The handle member 18 has a substantially square opening 64 when viewed from the front. With the handle member 18 assembled to the housing 12, the two adjustment knobs 46a and 46b 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 is composed.

The handle member 18 has a cover portion 66 projecting forward at the lower portion thereof. The cover portion 66 has a substantially arc shape when viewed from above and projects forward. A substantially rectangular opening 68 is formed in the center of the cover portion 66 when viewed from the front. With the handle member 18 assembled, the sensor cover 25 provided so as to cover the heat ray sensor portion 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 composed of, for example, resin molded parts. Four protrusions (not shown) are projected on the back surface of the decorative cover member 20. The decorative cover member 20 is detachably attached to the handle member 18 by fitting these protrusions into the engaging recesses 70 recessed around the opening 64 of the handle member 18.

A plurality of (three in this embodiment) 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 arranged between the two members 18 and 20. The light transmitting plate 19 is provided so as 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 is provided with a protruding portion 74 that protrudes in an arc shape when viewed from above. When the decorative cover member 20 is attached to the handle member 18, the protruding portion 74 is arranged in a state of being placed on the cover portion 66. Further, a mounting hole 76 is formed in the central portion of the protruding portion 74.

A decorative surface plate 22 is detachably attached to the front surface of the decorative cover member 20. The decorative surface plate 22 is composed of, for example, a translucent resin plate. The decorative surface plate 22 has a main body portion 80 that is rectangular in front view, and a mounting piece 82 that protrudes from the lower edge of the main body portion 80. The decorative surface plate 22 is attached by being fitted into a shallow rectangular recess 78 formed on the front surface of the decorative cover member 20 with the mounting piece 82 inserted into the mounting hole 76 of the decorative cover member 20.

As described above, in the automatic switch 10 of the present embodiment, the translucent plate 19, the decorative cover member 20 and the decorative surface plate 22 are integrally assembled to the handle member 18, and are configured to swing 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 46a and 46b constituting the setting operation unit 36 are exposed through the opening 64 of the handle member 18. Can be in a state. As a result, the adjustment knobs 46a and 46b can be rotated, and the lighting holding time of the lighting device L and the detection threshold value by the brightness sensor 29 can be adjusted.

Further, with the light-transmitting plate 19, the decorative surface plate 22 and the decorative surface plate 22 attached to the handle member 18, the opening 64 of the handle member 18, the light-transmitting plate 19, and the light-transmitting hole of the decorative cover member 20 72 is arranged to face the light guide member 54 provided in the housing 12. As a result, the light of the light emitting diode 34a on the first printed circuit board 42 housed in the housing 12 is emitted to the outside through the light guide member 54, the light transmitting plate 19, the light transmitting hole 72, and the decorative surface plate 22. It is configured to be.

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

The "automatic" indication is attached to the upper part of the plurality of light-transmitting holes 72 of the decorative cover member 20 at positions corresponding to the central light-transmitting holes 72. The indication of "continuous entry" is attached to the upper part of the position corresponding to the light-transmitting hole 72 on the right side of 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 off mode. The "automatic" display is for indicating that the automatic switch 10 is in the automatic lighting / extinguishing mode. The display of "continuous on" is 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 off mode, the light emitting diode 34a located on the left side in FIG. 4 is lit on the first printed circuit board 42, and the translucent hole corresponding to the display of "OFF" is displayed on the front surface of the automatic switch 10. 72 is lit. When the automatic switch 10 is in the automatic lighting / extinguishing mode, the light emitting diode 34a located at the center in FIG. 4 is lit on the first printed circuit board 42, and the light transmissive corresponding to the “automatic” display is displayed on the front surface of the automatic switch 10. The hole 72 is lit. When the automatic switch 10 is in the continuous lighting mode, the light emitting diode 34a located on the right side in FIG. 4 is lit on the first printed circuit board 42, and the light transmissive corresponding to the display of "continuous on" is displayed on the front surface of the automatic switch 10. The hole 72 is lit.

As shown in FIG. 6, the light guide member 54 is attached to the light guide member insertion portion 52 of the cover 16 as described above. The light guide member 54 includes a plurality of light guide pieces 54a for guiding the light of the light emitting diode 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 54a is formed so as to extend from an exposed tip end portion on the front surface of the cover 16 to a base end portion facing the light emitting diode 34a mounted on the first printed circuit board 42. As a result, each of the light guide pieces 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.

Further, each light guide piece 54a is inserted and attached to each of the tubular support protrusions 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 integrally formed 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 between the base end portion and the tip 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 surface 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 communicating with each other in the internal space of the support projection 53 projecting to the back surface side of the cover 16. These openings are a plurality of display holes for exposing the tip portion 57a of the light guide member 54 to the outside of the housing 12. Around these openings, a flat rectangular peripheral frame 55 extending laterally long in the front view is erected on the front surface of the cover 16. The peripheral frame 55 is formed in a size capable of accommodating the tip portions of the three light guide pieces 54a and the connecting portion 54b connecting them.

The light guide member 54 is assembled to the cover 16 by inserting the three light guide pieces 54a into the support projections 53, respectively. 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 tip end portion and the connecting portion 54b of each light guide piece 54a of the light guide member 54 assembled to the cover 16 are housed in the peripheral frame 55. As a result, the light guide member 54 assembled to the cover 16 is stably held.

As shown in FIGS. 8A and 8B, each of the light guide pieces 54a of the light guide member 54 is formed by extending the base end portion 57b inserted and arranged in the support projection 53 and its vicinity in a rectangular parallelepiped shape. ing. The tip portion 57a of each light guide piece 54a is formed slightly larger than the base end portion 57b, and a step portion 57c is formed between the two.

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. By connecting the connecting portion 54b in the vicinity of the tip portion 57a in this way, there are the following advantages. That is, the closer the connecting portion is connected to the base end portion 57b of each light guide piece 54a, the more light incident from the base end portion 57b into the light guide piece 54a is adjacent to another light guide via the connecting portion. It becomes easy to leak to 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 the present embodiment, since the connecting portion 54b is connected in the vicinity of the tip portion 57a of each light guide piece 54a, it is possible to suppress leakage to the adjacent light guide piece 54a via the connecting portion 54b. , The visibility of the mode display unit 34 is improved.

Further, as shown in FIG. 8A, the tip portion 57a of each light guide piece 54a has a tip surface that is curved and protrudes so as to form a part of a spherical surface. As a result, refraction occurs when the light incident from the base end portion of each light guide piece 54a is emitted from the tip portion 57a, so that the light has an angular spread as compared with the case where the tip 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 each of the light guide pieces 54a of the light guide member 54 in a state of being accommodated are formed so as to project from the back surface of the cover 16 toward the inside of the housing 12. Among the three support protrusions 53, the support protrusion 53 located at the center extends longer than the support protrusions 53 on both sides thereof and protrudes. As a result, as shown in FIG. 6, when the cover 16 is assembled to the case 14 accommodating the circuit unit 40, the central support projection 53 is formed 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 and the first and second printed circuit boards 42, 44 at the position corresponding to the central light emitting diode 34a. The electrical connection between them can be made more secure.

As described above, the automatic switch 10 of the present embodiment has a heat ray sensor unit 24 that detects heat rays emitted from a human body and a control signal that controls load on / off based on a sensor signal from the heat ray sensor unit 24. A control unit 30 that outputs, a switch 32 that controls on / off of power supply to the load based on a control signal, and a mode display unit 34 that displays an on / off control mode of the switch 32 are mounted. The printed circuit boards 42 and 44 are housed in a housing 12 including a case 14 and a cover 16. The mode display unit 34 includes a plurality of 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 housing 12. .. The cover 16 has a plurality of display holes for exposing the tip 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 holes to the first printed circuit board 42. It has a support protrusion 53 that comes into contact with the first printed circuit board 42. According to this configuration, the visibility of the mode display to the user can be improved, and the cover 16 can be assembled in a more stable state with respect to the printed circuit boards 42 and 44 housed and arranged in the housing 12. ..

Further, in the automatic switch 10 of the present embodiment, the support protrusions 53 extend in a tubular shape from each display hole, and one of the plurality of support protrusions 53 has a support protrusion 53 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, which is in contact with the periphery of one of the plurality of light emitting diodes 34a. According to this configuration, the connector 43 is pressed with and from 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 secure.

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 are made in the matters described in the claims of the present application and in the equivalent range thereof. And can be changed.

For example, in the above, an 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 has been described, but the present invention is not limited thereto. For example, a plurality of support protrusions may be extended so as to be in contact with the first printed circuit board.

10 Automatic switch with heat ray sensor, 12 housing, 14 case, 16 cover, 18 handle member, 19 translucent plate, 20 decorative cover member, 22 decorative surface plate, 24 heat ray sensor part, 25 sensor cover, 25a, 25b shutter , 26 operation switch, 28 input discriminator, 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 circuits Unit, 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 bending piece, 57a tip part, 57b base end part, 57c step part, 58,74 protruding part, 60, 64, 68 openings Part, 66 Cover part, 72 Transmissive hole, 76 Mounting hole, 78 Recess, 80 Main body part, 82 Mounting piece,
AC commercial power supply, L lighting equipment.

Claims (2)

A heat ray sensor that detects heat rays emitted from the human body,
A control unit that outputs a control signal for controlling load on / off based on a sensor signal from the heat ray sensor unit, and a control unit.
A switch that controls on / off of power supply to the load based on the control signal, and
An automatic switch with a heat ray sensor in which a printed circuit board on which a mode display unit for displaying the on / off control mode of the switch is mounted is housed in a housing including 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 the light of each light emitting element to the outside of the housing.
The cover has a plurality of display holes for exposing the tip 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 to hit the printed circuit board. An automatic switch with a heat ray sensor characterized by having a support protrusion in contact with the heat ray sensor. The support protrusions extend from each display hole in a tubular shape, and one of the plurality of support protrusions hits the surface of the printed circuit board around one of the plurality of light emitting elements. The automatic switch with a heat ray sensor according to claim 1, wherein a connector is provided on the back surface of the printed circuit board at a position corresponding to the one light emitting element.

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