WO2023079951A1 - 近接センサ、及びそれを備える配線器具 - Google Patents

近接センサ、及びそれを備える配線器具 Download PDF

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Publication number
WO2023079951A1
WO2023079951A1 PCT/JP2022/038834 JP2022038834W WO2023079951A1 WO 2023079951 A1 WO2023079951 A1 WO 2023079951A1 JP 2022038834 W JP2022038834 W JP 2022038834W WO 2023079951 A1 WO2023079951 A1 WO 2023079951A1
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WO
WIPO (PCT)
Prior art keywords
light
region
guide member
proximity sensor
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/038834
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English (en)
French (fr)
Japanese (ja)
Inventor
弘行 工藤
思含 董
孝浩 園
良彦 原野
志実 四元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Panasonic Holdings Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Holdings Corp filed Critical Panasonic Holdings Corp
Priority to JP2023557934A priority Critical patent/JP7787199B2/ja
Publication of WO2023079951A1 publication Critical patent/WO2023079951A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present disclosure relates to a proximity sensor and a wiring device including the same. More specifically, the present disclosure relates to a proximity sensor that detects the approach of a detection target, and a wiring device that includes the same.
  • Patent Document 1 discloses a proximity sensor that includes a light emitting portion, a light receiving portion, and a window member.
  • the window member is provided in front of the light emitting section and the light receiving section.
  • the detection light emitted by the light emitting unit is emitted to the outside through the window member. Reflected light of the detection light from the object to be detected enters the light receiving section through the window member.
  • Proximity sensors such as those described above are required to have improved sensitivity in order to detect objects (detection targets) that are farther away.
  • An object of the present disclosure is to provide a proximity sensor with improved sensitivity and a wiring device including the same.
  • a proximity sensor includes a detection unit and a light guide member.
  • the detection section has a light emitting section that emits light and a light receiving section that outputs an electrical signal corresponding to the incident light.
  • the light guide member has a first area facing the light emitting section and a second area facing the light receiving section on a first surface facing the detection section. It has a third region on the second surface.
  • the light guide member guides the light incident from the first region to the third region and emits the light from the third region to the outside, and transmits the light reflected by the detection target incident from the third region to the second region.
  • the light is guided to the area and emitted from the second area to the light receiving section.
  • the second area is provided with a condensing section that condenses the light passing through the second area onto the light receiving section.
  • a wiring accessory includes the proximity sensor and a control section that controls a device based on the detection result of the detection section.
  • FIG. 1 is an exploded perspective view of a wiring device including a proximity sensor according to an embodiment of the present disclosure
  • FIG. FIG. 2 is a block diagram of wiring accessories same as the above.
  • FIG. 3 is a bottom view of a light guide member included in the same proximity sensor.
  • FIG. 4 is a rear view of the light guide member of the same.
  • FIG. 5 is an external perspective view of the same light guide member.
  • FIG. 6 is a cross-sectional view of the same wiring device.
  • FIG. 7 is an enlarged view of part A in FIG.
  • FIG. 8 is an external perspective view of the wiring device same as the above.
  • FIG. 9 is a front view of wiring accessories same as the above.
  • FIG. 10 is a rear view of the same wiring accessory.
  • FIG. 11 is a rear view of the outer cover with which wiring accessories same as the above are provided.
  • 12 is a bottom view of a light guide member included in the proximity sensor of Modification 1.
  • FIG. 13 is an external perspective view of a light guide member included in the proximity sensor of Modification 2.
  • FIG. 14 is a cross-sectional view of a light guide member included in the proximity sensor of Modification 2.
  • the proximity sensor 10 of this embodiment is used, for example, to detect a detection target such as a human body or an object.
  • a detection target such as a human body or an object.
  • the detection target of the proximity sensor 10 is a human body will be described as an example, but the detection target of the proximity sensor 10 is not limited to the human body and may be an object.
  • the proximity sensor 10 includes a detection section 20 and a light guide member 30, as shown in FIG.
  • the detection section 20 has a light emitting section 21 that emits light and a light receiving section 22 that outputs an electrical signal corresponding to the incident light.
  • the light guide member 30 has a first surface 30A facing the detection unit 20, a first region 31 facing the light emitting unit 21, and a light receiving unit 22. It has a second region 32 .
  • the light guide member 30 has a third region 33 on the second surface 30B opposite to the first surface 30A.
  • the light guide member 30 guides the light incident from the first region 31 to the third region 33 and emits the light from the third region 33 to the outside.
  • the light guide member 30 guides the reflected light from the detection target B ⁇ b>1 (see FIG. 6 ) incident from the third region 33 to the second region 32 and emits the light from the second region 32 to the light receiving section 22 .
  • the light emitted from the light emitting unit 21 is emitted to the space A1 through the light guide member 30 and strikes the detection target B1, and the reflected light from the detection target B1 passes through the light guide member 30 and passes through the light receiving unit 22.
  • 1 shows an example of an optical path incident on .
  • the second area 32 is provided with a condensing section 321 that condenses the light passing through the second area 32 onto the light receiving section 22 .
  • the first region 31 “opposes” the light emitting unit 21 is not limited to the first region 31 directly facing the light emitting unit 21, and the first region 31 has one or more translucent may be opposed to the light emitting section 21 via the translucent member.
  • the second region 32 “facing” the light receiving section 22 is not limited to the fact that the second region 32 directly faces the light receiving section 22, and the second region 32 has one or more translucent may be opposed to the light receiving section 22 via the translucent member.
  • the detection target B1 is a part of the human body (for example, a hand) that exists within the detection range of the proximity sensor 10 in the space A1 facing the third area 33 .
  • the detection target B1 is not limited to a part of the human body, and may be a movable object.
  • the third region 33 is not limited to directly facing the space A1 in which the detection target B1 exists, and may face the space A1 via one or more translucent members.
  • the wiring device 1 includes a proximity sensor 10 having a detection section 20 and a light guide member 30, and a control section 50 (see FIG. 2) that controls the device 3 based on the detection result of the detection section 20.
  • control of the device 3 may be control for switching between a power supply state in which power is supplied to the device 3 and a power supply stop state in which power supply to the device 3 is stopped, or a control signal may be transmitted by wired communication or wireless communication.
  • the operation state of the device 3 may be controlled by transmitting to the device 3 .
  • the proximity sensor 10 of the present embodiment the light that passes through the second region 32 is condensed on the light receiving portion 22 by the light collecting portion 321 provided in the second region 32, so that the light that enters the light receiving portion 22 is can be increased, thereby improving the detection sensitivity of the detection unit 20 . Therefore, according to this embodiment, the proximity sensor 10 with improved sensitivity can be provided.
  • the proximity sensor 10 according to the present embodiment and the wiring accessory 1 including the proximity sensor 10 will be described in detail with reference to the drawings.
  • the X-axis direction is defined as the horizontal direction
  • the Y-axis direction is defined as the front-rear direction (depth direction)
  • the Z-axis direction is defined as the vertical direction.
  • the positive direction of the X-axis direction is defined as the right side
  • the positive direction of the Y-axis direction is defined as the front side
  • the positive direction of the Z-axis direction is defined as the upper side.
  • these directions are only examples, and are not intended to limit the directions in which the proximity sensor 10 and the wiring device 1 are used.
  • the arrows indicating each direction in the drawings are only shown for explanation and are not substantial.
  • FIG. 2 is a schematic block diagram of the wiring accessory 1 of this embodiment.
  • the wiring device 1 includes the proximity sensor 10 (see FIG. 1) having the detection unit 20 and the control unit 50, as described above.
  • the wiring device 1 also includes a pair of first terminals T11 and T12, a pair of second terminals T21 and T22, a switch 51, a display section 52, a brightness sensor 53, a temperature sensor 54, and a power supply section 55. And further comprising.
  • a power supply 2 such as a commercial AC power supply is connected to the pair of first terminals T11 and T12 via electric wires.
  • a device 3 such as a lighting fixture is connected to the pair of second terminals T21 and T22 via electric wires.
  • the power supply unit 55 steps down the AC voltage input via the first terminals T11 and T12, rectifies and smoothes the voltage, and converts it into a DC voltage of a predetermined voltage value.
  • the power supply unit 55 supplies a voltage required for operation to internal circuits such as the detection unit 20, the control unit 50, the display unit 52, the brightness sensor 53, the temperature sensor 54, and the like.
  • the switch 51 includes a semiconductor switch such as a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a three-terminal thyristor, and is controlled to be turned on or off by the control unit 50 .
  • the switch 51 is electrically connected between the second terminal T22 and the first terminal T12. Also, the first terminal T11 and the second terminal T21 are electrically connected via an internal conductive member.
  • the power supply 2 and the device 3 are connected in series across the switch 51, and the switch 51 is turned on/off to cut off the power supply to the device 3 and the power supply state in which the power is supplied to the device 3. and the power supply stop state.
  • the detection unit 20 includes a light emitting unit 21, a light receiving unit 22, and a detection circuit 23.
  • the light emitting unit 21 has, for example, an infrared light emitting diode that emits light in the infrared region.
  • the light emitting unit 21 may be configured to emit infrared light all the time, or may be configured to emit infrared light at predetermined time intervals.
  • the light emitted from the light emitting section 21 is emitted to the space A1 through the light guide member 30 and the light-transmitting cover 60 (see FIG. 1).
  • the light receiving section 22 has, for example, a photodiode sensitive to light in the infrared region.
  • the light receiving section 22 converts the incident light into an electrical signal and outputs the electrical signal to the detection circuit 23 .
  • the light receiving section 22 outputs an electric signal having a voltage level corresponding to the amount of light received to the detection circuit 23 .
  • the detection circuit 23 detects the presence or absence of the detection target B1 (for example, part of the human body) based on the electrical signal input from the light receiving unit 22 .
  • the detection circuit 23 outputs a detection signal indicating the presence of the detection target B1 to the control unit 50 when the voltage level of the electric signal output from the light receiving unit 22 exceeds a predetermined threshold.
  • the detection section 20 outputs to the control section 50 a detection signal indicating that the detection target B1 does not exist. Note that it is not essential that the detection unit 20 have the function of the detection circuit 23 , and the control unit 50 may have the function of the detection circuit 23 .
  • the display unit 52 includes two light emitting diodes 521 and 522 (see FIG. 1).
  • the control unit 50 turns on the two light-emitting diodes 521 and 522 to cause the projecting portion 61 of the translucent cover 60 to emit light.
  • the protruding portion 61 shines brightly, so that the user can grasp the position of the protruding portion 61 (that is, the position of the wiring accessory 1).
  • the brightness sensor 53 is sensitive to light in the near-infrared region.
  • the brightness sensor 53 has, for example, a photodiode, detects the brightness of the space A1, and outputs the detection result to the control unit 50.
  • FIG. 1 A photodiode
  • the temperature sensor 54 detects the temperature around the wiring device 1 .
  • the temperature sensor 54 has a temperature sensitive element such as a thermistor.
  • the temperature sensor 54 detects, for example, the temperature of the detection section 20 and outputs the detection result to the control section 50 .
  • the main configuration of the control unit 50 is a computer system having one or more processors and memories.
  • the functions of the control unit 50 are realized by the processor of the computer system executing a program recorded in the memory of the computer system.
  • the program may be recorded in a memory, provided through an electric communication line such as the Internet, or recorded in a non-temporary recording medium such as a memory card and provided.
  • the control unit 50 controls on/off of the switch 51 based on the detection result of the detection unit 20 . Further, the control unit 50 turns off the light-emitting diodes 521 and 522 when the switch 51 is turned on (that is, when the lighting fixture is turned on), and turns off the light-emitting diodes 521 and 522 when the switch 51 is turned off (that is, when the lighting fixture is turned off). 522 is turned on.
  • the control unit 50 also has a function of adjusting the threshold of the detection circuit 23 according to the detection results of the brightness sensor 53 and the temperature sensor 54.
  • the threshold of the detection circuit 23 can be switched between two levels, a first threshold and a second threshold higher than the first threshold.
  • the control unit 50 controls the device 3 based on the detection result of the detection unit 20 and the detection result of the brightness sensor 53. Specifically, when the brightness detected by the brightness sensor 53 is darker than a predetermined first reference value, the control unit 50 sets the threshold of the detection circuit 23 to the first threshold. Further, when the brightness detected by the brightness sensor 53 is the same as or brighter than the first reference value, the control unit 50 sets the threshold of the detection circuit 23 to the second threshold. When the ambient brightness is the same as or brighter than the first reference value, the threshold of the detection circuit 23 is set to a second threshold higher than the first threshold, so external light (for example, sunlight etc.) can be suppressed.
  • external light for example, sunlight etc.
  • control unit 50 controls the device 3 based on the detection result of the detection unit 20 and the detection result of the temperature sensor 54 . Specifically, when the temperature detected by the temperature sensor 54 is lower than a predetermined second reference value, the controller 50 sets the threshold of the detection circuit 23 to the first threshold. Further, when the temperature detected by the temperature sensor 54 is equal to or higher than the second reference value, the control unit 50 sets the threshold of the detection circuit 23 to the second threshold. The output of the detection circuit 23 tends to increase as the temperature rises, but when the temperature detected by the temperature sensor 54 is equal to or higher than the second reference value, the threshold of the detection circuit 23 is set to the second threshold higher than the first threshold. Since it is set, erroneous detection by the detection circuit 23 can be suppressed.
  • FIG. 1 is a diagrammatic representation of the wiring accessory 1 .
  • the wiring device 1 further includes a case 70 having a body 71 and a cover 72, and a front panel 90.
  • the wiring device 1 is attached to a facility wall 200 (see FIG. 6) or the like using a synthetic resin attachment frame 100, for example.
  • the mounting frame 100 is, for example, a mounting frame dedicated to wide handle type switches standardized by Japanese Industrial Standards.
  • a rectangular window hole 101 is provided in the center of the mounting frame 100 , and the case 70 of the wiring device 1 is fitted into this window hole 101 .
  • the mounting frame 100 has a pair of side walls 102 on both left and right sides of the window hole 101 .
  • a total of eight fitting holes 103 are provided in each of the pair of side walls 102 at intervals in the longitudinal direction (vertical direction).
  • Mounting pieces 104 are provided on both upper and lower sides of the window hole 101, respectively.
  • a long hole 105 is provided in the center of each mounting piece 104 into which a screw for fixing the mounting frame 100 to the switch box embedded in the wall 200 is inserted.
  • Each mounting piece 104 is provided with two round holes 106 spaced apart in the left-right direction on the side opposite to the window hole 101 with respect to the long hole 105 . Further, each mounting piece 104 is provided with a screw hole 107 for mounting a rectangular plate frame covering the front surface of the mounting frame 100 between the two round holes 106 .
  • the plate frame is provided with a rectangular window through which the front panel 90 is exposed.
  • the mounting frame 100 is fixed to a switch box embedded in the wall 200 with screws passed through the long holes 105, or fixed to a wall such as a gypsum board using clamps. Also, the mounting frame 100 is fixed to a wooden wall or the like with tapping screws passed through round holes 106 . Also, the plate frame is fixed to the mounting frame 100 by placing the plate frame on the front surface of the mounting frame 100 and screwing the screws through the holes of the plate frame into the screw holes 107 . Illustration of the plate frame is omitted in FIG.
  • the case 70 is formed into a rectangular box shape by joining the body 71 and the cover 72 together.
  • the body 71 constitutes the rear portion of the case 70 .
  • the body 71 is made of synthetic resin, for example, and has a rectangular box shape with an opening on the front surface.
  • Two wire insertion holes 75 into which wires are inserted are provided on each of the left and right sides of the rear surface of the body 71 (see FIG. 10).
  • two wire insertion holes 75 on one side receive two wires respectively connected to the first terminals T11 and T12.
  • Two wires connected to the second terminals T21 and T22, respectively, are inserted into the remaining two wire insertion holes 75 that have been inserted.
  • the cover 72 constitutes the front part of the case 70 .
  • the cover 72 is made of synthetic resin, for example, and has a rectangular box shape with an opening on the rear surface.
  • a rectangular window hole 76 for exposing the third region 33 of the light guide member 30 is provided in the center of the front surface of the cover 72 .
  • left and right side walls of the cover 72 are provided with two protrusions 77 that are respectively fitted into two fitting holes 103 provided in the vertical center of the left and right side walls 102 of the mounting frame 100 .
  • a pair of protruding pieces 74 protruding rearward from both ends in the left-right direction are provided on the upper side wall and the lower side wall of the cover 72 .
  • a pair of protrusions 73 are provided on each of the upper and lower walls of the body 71 .
  • the body 71 and the cover 72 are butted against each other in the front-rear direction, and the projections 73 of the body 71 are fitted into the holes of the projecting pieces 74 of the cover 72 , so that the body 71 and the cover 72 are joined to assemble the case 70 .
  • Components such as the first substrate 81 , the second substrate 82 , and the light guide member 30 are housed inside the case 70 .
  • the second substrate 82 is accommodated inside the case 70 so as to be positioned behind the first substrate 81 .
  • Components such as the detection unit 20, the control unit 50, the display unit 52, the brightness sensor 53, and the temperature sensor 54 are mounted on the first substrate 81.
  • the detection unit 20 is mounted at a position corresponding to the window hole 76 of the cover 72 .
  • the light-emitting unit 21 and the light-receiving unit 22 included in the detection unit 20 are arranged along the arrangement direction DR1, which is the left-right direction.
  • the first substrate 81 is provided with a long hole 83 on the right side of the detection section 20 and a round hole 84 on the left side of the detection section 20 .
  • the display unit 52 includes, for example, two green light emitting diodes 521 and 522 , and the two light emitting diodes 521 and 522 are arranged one each above and below the detection unit 20 .
  • Components such as the first terminals T11 and T12, the second terminals T21 and T22, and the power source section 55 are mounted on the second substrate 82.
  • the first terminals T11 and T12 and the second terminals T21 and T22 are arranged at positions corresponding to two pairs of wire insertion holes 75 provided on the rear surface of the body 71 .
  • the light guide member 30 is housed inside the case 70 so as to be positioned in front of the detection section 20 and the two light emitting diodes 521 and 522 .
  • the light guide member 30 includes a rectangular parallelepiped main portion 300 and two light guide members provided at a first right end portion 301 and a left second end portion 302 of the main portion 300, respectively. and a light guide portion 40 (a first light guide portion 40A and a second light guide portion 40B).
  • the first end portion 301 and the second end portion 302 of the light guide member 30 are located on both sides of the detection section 20 in the arrangement direction DR1.
  • the light guide part 40 is provided on at least one of the first end part 301 and the second end part 302 and guides the noise light traveling inside the light guide member 30 toward the first surface 30 ⁇ /b>A to the fourth region 34 . Then, the light is emitted from the fourth area 34 to the outside.
  • the noise light is reflected by the second surface 30B or the side surface of the light guide member 30, among the emitted light of the light emitting unit 21 that enters the inside of the light guide member 30 from the first region 31, and is reflected by the first surface 30A. (for example, light passing through optical paths C3 and C4 in FIG. 7).
  • the noise light is light that enters the light guide member 30 from the third region 33 and travels toward the first surface 30A, and is light other than the light reflected by the detection target B1 (for example, the light path in FIG. light through C2).
  • a first surface 30A which is the rear surface of the main portion 300, is provided with a first area 31 in which the light from the light emitting section 21 is incident on the area facing the light emitting section 21 of the detection section 20. As shown in FIG.
  • a second region 32 is provided on the first surface 30A of the main portion 300 in a region facing the light receiving portion 22 of the detection portion 20, and light is emitted from the inside of the light guide member 30 to the outside through the second region 32. The light is incident on the light receiving section 22 .
  • the first region 31 and the second region 32 are provided along the arrangement direction DR1 on the first surface 30A.
  • the second region 32 is provided with a condensing portion 321 that converges the light passing through the second region 32 onto the light receiving portion 22 .
  • the condensing part 321 includes a convex condensing lens protruding toward the light receiving part 22 . It should be noted that the condensing part 321 is not limited to one including a convex condensing lens, and may be a Fresnel lens-shaped lens.
  • two light incident surfaces 35 and 36 are provided on both sides of the first region 31 and the second region 32 in the direction (vertical direction) orthogonal to the arrangement direction DR1.
  • the two light incident surfaces 35 and 36 face the two light emitting diodes 521 and 522 mounted on the first substrate 81, respectively.
  • Light emitted from each of the two light-emitting diodes 521 and 522 enters the light guide member 30 through the light incident surfaces 35 and 36, passes through the light guide member 30, and is guided to the third region 33. , is emitted from the third region 33 to the outside.
  • the light of the light-emitting diodes 521 and 522 emitted from the third region 33 passes through the light-transmitting cover 60 and is emitted into the space A1. Lights at 521 and 522 can be confirmed.
  • the front surface of the main portion 300 is formed in a rectangular shape, and the front surface of the main portion 300 serves as the third region 33 .
  • a front end of the main portion 300 is exposed forward through the window hole 76 of the cover 72 .
  • the third area 33 on the front surface of the main portion 300 faces the rear surface of the translucent cover 60 , and the light guide member 30 faces the space A ⁇ b>1 via the translucent cover 60 .
  • the light guide portion 40 (first light guide portion 40A) provided at the first end portion 301 includes a first protrusion portion 41 that protrudes rightward along the arrangement direction DR1 from the first end portion 301; and a second projecting portion 42 projecting from the rear portion of the portion 41 toward the detecting portion 20 (that is, rearward). Further, the light guide portion 40 provided at the first end portion 301 further includes a third protrusion portion 43 that protrudes from the second protrusion portion 42 in the direction opposite to the detection portion 20 (that is, rightward) in the arrangement direction DR1. .
  • a rectangular parallelepiped fitting protrusion 45 protruding downward is provided on the lower surface of the light guide portion 40 provided at the first end portion 301 (that is, the lower surface of the second projecting portion 42 and the third projecting portion 43). It is
  • the light guide portion 40 (second light guide portion 40B) provided at the second end portion 302 includes a first protrusion portion 41 that protrudes leftward from the second end portion 302 along the arrangement direction DR1, and a first protrusion portion 41 that protrudes leftward along the arrangement direction DR1. and a second projecting portion 42 projecting from the rear portion of the portion 41 toward the detecting portion 20 (that is, rearward). Further, the light guide portion 40 provided at the second end portion 302 further includes a third protrusion portion 43 that protrudes from the second protrusion portion 42 in the direction opposite to the detection portion 20 (that is, leftward) in the arrangement direction DR1. .
  • a cylindrical fitting projection 46 protruding downward is provided on the lower surface of the light guide portion 40 provided at the second end portion 302 (that is, the lower surface of the second projecting portion 42 and the third projecting portion 43). It is
  • part of the light emitted from the light emitting section 21 enters the inside of the light guide member 30 from the first region 31, and then is reflected by the inner surface of the light guide member 30.
  • part of the light reflected by the inner surface of the light guide member 30 is guided to the fourth region 34 by the light guide portion 40 and emitted from the fourth region 34 to the outside.
  • part of the light other than the light reflected by the detection target B1 among the light that has entered the light guide member 30 from the third region 33 is guided to the fourth region 34 by the light guide section 40 and 34 to the outside.
  • the noise light traveling toward the first surface 30A inside the light guide member 30 the light incident on the light receiving section 22 through the second region can be reduced, thereby reducing crosstalk or noise incident from the outside.
  • a decrease in sensitivity of the proximity sensor 10 can be suppressed.
  • the light guide section 40 includes the first protrusion 41 that protrudes from both the first end 301 and the second end 302 along the arrangement direction DR1. Only one of the two ends 302 may be provided with the first projecting portion 41 . In other words, the light guide portion 40 only needs to include the first projecting portion 41 projecting along the arrangement direction DR1 from at least one of the first end portion 301 and the second end portion 302. 1 includes at least a partial area of the surface of the protrusion 41 . In other words, the light guide member 30 may be provided with only the first projecting portion 41 on at least one of the first end portion 301 and the second end portion 302 .
  • the light guide section 40 includes a second projecting section 42 projecting from both the first end section 301 and the second end section 302 toward the detecting section 20, but the first end section 301 and the second end section Only one of the portions 302 may be provided with the second projecting portion 42 . That is, the light guide section 40 only needs to include the second projecting section 42 projecting from at least one of the first end section 301 and the second end section 302 toward the detecting section 20, and the fourth region 34 is the 2 includes at least a partial area of the surface of the protrusion 42 . In other words, the light guide member 30 may be provided with only the second projecting portion 42 on at least one of the first end portion 301 and the second end portion 302 .
  • the first end portion 301 and the second end portion 302 are provided with the first protrusion portion 41 and the second protrusion portion 42, respectively. , the noise light can escape from the first projecting portion 41 to the second projecting portion 42 and be emitted from the surface of the second projecting portion 42 to the outside.
  • the first end portion 301 and the second end portion 302 are provided with the first protrusion portion 41 and the second protrusion portion 42, respectively. At least one of 302 may be provided with the first protrusion 41 and the second protrusion 42 .
  • the light guide section 40 further includes a third protrusion section 43 that protrudes from the second protrusion section 42 in the direction opposite to the detection section 20 in the arrangement direction DR1.
  • the light guide member 30 is provided with the second projecting portion 42 and the third projecting portion 43 at the first end portion 301 and the second end portion 302, respectively. The light can escape from the portion 42 to the third projecting portion 43 and be emitted to the outside from the surface of the third projecting portion 43 .
  • the fitting projection 45 is inserted into the long hole 83 of the first substrate 81 and the fitting projection 46 is inserted into the round hole 84 of the first substrate 81, and an appropriate method such as adhesion or crimping is used to conduct the conduction.
  • the optical member 30 is fixed to the front surface of the first substrate 81 .
  • the light emitting section 21 of the detection section 20 faces the first area 31 and the light receiving section 22 of the detection section 20 faces the second area 32 .
  • the two light incident surfaces 35 and 36 of the light guide member 30 face the two light emitting diodes 521 and 522, respectively.
  • the light from the light emitting part 21 enters the inside of the light guide member 30 from the first region 31 and exits from the third region 33 to the outside. Further, when the light emitted from the third region 33 to the outside is reflected by the detection target B1 existing in the space A1 and enters the light guide member 30 from the third region 33, the light enters the light guide member 30. The light is guided to the second region 32 , emitted from the second region 32 to the outside, and enters the light receiving section 22 .
  • the case 70 is inserted into the window hole 101 of the mounting frame 100 from the rear side, and the two protrusions 77 on the left and right side walls of the cover 72 are fitted into the two fitting holes 103 provided on the left and right side walls 102 . Thereby, the case 70 is attached to the attachment frame 100 .
  • the front portion of the cover 72 protrudes forward from the window hole 101 of the mounting frame 100 .
  • the front panel 90 is made of synthetic resin and has a rectangular front surface.
  • a rectangular window hole 92 is provided in the center of the front surface of the front panel 90 at a position corresponding to the window hole 76 of the cover 72 .
  • the rear surface of the front panel 90 is provided with two hooks 91 projecting rearward from both left and right sides.
  • the front panel 90 is attached to the front side of the cover 72 by hooking the left and right hooks 91 on the recesses 78 provided on the left and right sides of the cover 72 .
  • a translucent cover 60 (see FIG. 1) and a light shielding part 65 (see FIG. 1) are attached to the rear surface of the front panel 90 .
  • the proximity sensor 10 further includes a translucent cover 60 that is arranged to face the third region 33 of the light guide member 30 and that has optical transparency. Since the light-transmitting cover 60 is arranged on the front side of the light guide member 30 , the light-transmitting cover 60 can protect the light guide member 30 .
  • the translucent cover 60 is made of translucent synthetic resin such as polycarbonate resin or acrylic resin.
  • the translucent cover 60 has a rectangular shape when viewed from the front side.
  • a pedestal-like protrusion 61 that is inserted into the window hole 92 of the front panel 90 is provided.
  • the translucent cover 60 has a protruding portion 61 that protrudes in the direction opposite to the light guide member 30 .
  • the light-transmitting cover 60 is provided with a light diffusing portion 611 that diffuses the light transmitted through the light-transmitting cover 60 .
  • the light diffusing portion 611 has, for example, a fine uneven shape formed on the surface of the projecting portion 61 , and can diffuse the light transmitted through the light-transmitting cover 60 by the light diffusing portion 611 .
  • the angle ⁇ 1 in FIG. 7 is the spread angle of the light emitted from the translucent cover 60 when the light diffusion portion 611 is not provided, and the angle ⁇ 2 in FIG. 7 is the spread angle when the light diffusion portion 611 is provided. is the spread angle of the light emitted from the light-transmitting cover 60 in this case.
  • the light diffusing portion 611 is not provided, the spread angle of the light emitted from the light-transmitting cover 60 is narrowed. , the detection unit 20 becomes difficult to detect the hand.
  • the projection 61 is provided with the light diffusion portion 611, the spread angle of the light emitted from the light-transmitting cover 60 can be widened. ) is easier to detect.
  • the translucent cover 60 is provided with elongated holes 62 extending in the vertical direction on both left and right sides of the projecting portion 61 .
  • the wiring device 1 further has a light shielding part 65 arranged on the side opposite to the light guide member 30 with respect to the translucent cover 60 .
  • the light shielding part 65 is formed in a rectangular plate shape from a synthetic resin having a lower translucency than that of the front panel 90, and is, for example, black in which visible light is hard to pass.
  • the light shielding part 65 is arranged between the rear surface of the front panel 90 and the translucent cover 60 .
  • a square through-hole 66 for passing the projecting portion 61 of the translucent cover 60 is provided in the center of the light shielding portion 65 . That is, the projecting portion 61 is inserted into the through hole 66 provided in the light shielding portion 65 .
  • the light shielding portion 65 is provided with two through holes 67 at positions respectively corresponding to the two elongated holes 62 provided in the translucent cover 60 .
  • the back surface of the front panel 90 is provided with two projections 93 on both left and right sides of the window hole 92.
  • the two projections 93 are used to separate the translucent cover 60 and the light shielding portion 65. are attached to the back side of the front panel 90 .
  • the light shielding part 65 and the translucent cover 60 are placed on the back surface of the front panel 90 so that the through holes 67 and the elongated holes 62 are inserted into each of the two projections 93 .
  • the light shielding part 65 is arranged between the rear surface of the front panel 90 and the translucent cover 60 .
  • the light-transmitting cover 60 and the light-shielding portion 65 are fixed to the back surface of the front panel 90 by applying pressure or heat to the tips of the two projections 93 protruding from the back surface of the light-transmitting cover 60 to crush them.
  • the front surface of the projecting portion 61 of the light-transmitting cover 60 is exposed forward through the window hole 92 of the front panel 90 .
  • the wiring accessory 1 of this embodiment is used to operate the device 3.
  • the light-emitting portion 21 of the proximity sensor 10 included in the wiring device 1 emits light all the time or periodically, and the light emitted from the light-emitting portion 21 is irradiated to the space A1 through the light guide member 30 and the light-transmitting cover 60. be.
  • the control unit 50 turns on the switch 51 based on the detection signal input from the detection circuit 23, switches to the power supply state in which power is supplied to the device 3, and lights the device 3, which is a lighting fixture.
  • the control unit 50 extinguishes the light emitting diodes 521 and 522 included in the display unit 52 .
  • the detection circuit 23 outputs a detection signal indicating the presence of the detection target B1 to the control section 50 .
  • the control unit 50 turns off the switch 51 based on the detection signal input from the detection circuit 23, switches to a power supply stop state that cuts off the power supply to the device 3, and turns off the device 3, which is a lighting fixture. Let When the power supply state is switched to the power supply stop state, the control unit 50 lights the light-emitting diodes 521 and 522 included in the display unit 52 .
  • the spread angle of the light emitted from the light-transmitting cover 60 to the space A1 is widened, so that the specimen target B1 can be detected. You can extend the range and improve usability.
  • the light passing through the first region 31 can be made closer to parallel light, and the second surface 30B of the light guide member 30 can By reducing the amount of light reflected inward, the occurrence of crosstalk can be suppressed.
  • the amount of light emitted forward from the third area 33 is increased. Even when the light-transmitting cover 60 is widened, the power of the light emitted from the light-transmitting cover 60 can be increased, and there is an advantage that the detection sensitivity of the detection unit 20 is improved.
  • the light collecting portion 321 is provided in the second region 32 of the light guide member 30, the power of the light incident on the light receiving portion 22 can be increased, and the detection sensitivity of the detecting portion 20 is improved. be.
  • a light-shielding portion 65 is arranged between the front panel 90 and the light-transmitting cover 60, and the protruding portion 61 of the light-transmitting cover 60 is passed through the through hole 66 of the light-shielding portion 65 and protrudes forward.
  • unnecessary noise light that has passed through the front panel 90 and entered the light shielding portion 65 is attenuated by the light shielding portion 65 , thereby reducing the possibility of noise light entering the light guide member 30 through the light transmitting cover 60 . can be reduced, and erroneous detection by the detection unit 20 can be suppressed.
  • the wiring accessory 1 in the present disclosure includes a computer system in the control unit 50 and the like.
  • a computer system is mainly composed of a processor and a memory as hardware.
  • the function of the control unit 50 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system.
  • the program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided.
  • a processor in a computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs).
  • Integrated circuits such as ICs or LSIs are called differently depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration).
  • FPGAs Field-Programmable Gate Arrays
  • a plurality of electronic circuits may be integrated into one chip, or may be distributed over a plurality of chips.
  • a plurality of chips may be integrated in one device, or may be distributed in a plurality of devices.
  • a computer system includes a microcontroller having one or more processors and one or more memories. Accordingly, the microcontroller also consists of one or more electronic circuits including semiconductor integrated circuits or large scale integrated circuits.
  • the light guide 40 is provided at each of the first end 301 and the second end 302 , and the fourth region 34 is provided at both the first end 301 and the second end 302 . It includes at least part of the surface of the provided light guide section 40 .
  • the light guide section 40 includes the first light guide section 40A provided at the first end 301 and the second light guide section 40B provided at the second end 302.
  • the light section 40 may be provided at only one of the first end portion 301 and the second end portion 302 .
  • the first end portion 301 and the second end portion 302 of the light guide member 30 are respectively provided with the first protrusions 41 , and the second protrusions 41 toward the detection section 20 from the first protrusions 41 .
  • the portion 42 is provided, the first projecting portion 41 is not an essential component. That is, the light guide member 30 may be provided with only the second projecting portion 42 projecting from at least one of the first end portion 301 and the second end portion 302 toward the detecting portion 20 .
  • FIG. 12 shows a light guide member 30 of Modified Example 1.
  • the first region 31 and the second region 32 each protrude toward the detection portion 20. and a third protrusion 43 protruding from the second protrusion 42 in the direction opposite to the detection section 20 .
  • a portion of the main portion 300 located outside the first region 31 and the second region 32 in the arrangement direction DR1 serves as the guide portion 47 that guides the light to the second projecting portion 42 .
  • erroneous detection of the proximity sensor 10 can be suppressed by allowing noise light to escape to the second projecting portion 42 and the third projecting portion 43 .
  • both the first end portion 301 and the second end portion 302 are provided with the second protrusion portion 42 and the third protrusion portion 43, but the first end portion 301 and the second end portion 302 At least one of the second end portions 302 may be provided with the second projecting portion 42 and the third projecting portion 43 .
  • the third projecting portion 43 is not an essential component, and the light guiding member 30 may be provided with only the second projecting portion 42 .
  • the first region 31 is provided with a lens having positive power.
  • 13 and 14 show the light guide member 30 of Modification 2.
  • the first region 31 is provided with a lens 311 having positive power.
  • the lens 311 is, for example, a convex lens whose surface is formed into a convex curved surface protruding toward the light emitting section 21 . That is, the lens 311 has a convex curved surface protruding toward the light emitting section 21 .
  • An optical path C5 in FIG. 14 indicates the optical path of light emitted from the light emitting section 21, and an optical path C6 in FIG.
  • the lens 311 Since the lens 311 has a positive power, the spread of the light emitted from the light emitting section 21 and entering the inside of the light guide member 30 from the first region 31 can be narrowed down to make the light closer to parallel light. It is possible to reduce the amount of light that strikes the side wall of the light guide member 30 and enters the light receiving section 22, and suppresses the occurrence of crosstalk.
  • the optical axis AX1 of the light emitting section 21 is shifted from the position P1 where the curvature of the convex curved surface of the lens 311 is minimized.
  • the optical axis AX1 of the light emitting section 21 is, for example, the axis of rotational symmetry of the light flux emitted from the light emitting section 21 .
  • the lens 311 and the light emitting section 21 are arranged such that the optical axis AX1 faces a position closer to the second region 32 than the position P1 where the curvature is the minimum.
  • the light from the light emitting unit 21 is irradiated toward a portion having a larger curvature than the position P1 on the convex surface of the lens 311, and is refracted by the convex surface to be emitted from the light emitting unit 21.
  • the emitted light is guided so that most of the light is parallel in the forward direction. Therefore, of the light emitted from the light emitting section 21, the light that is reflected on the inner surface of the light guide member 30 and becomes noise light can be reduced, and the occurrence of crosstalk can be suppressed.
  • the lens 311 and the light emitting unit 21 are arranged so that the optical axis AX1 is directed to a position close to the second region 32 with respect to the position P1.
  • the lens 311 and the light emitting section 21 may be arranged such that the optical axis AX1 faces a position far from the area 32 .
  • the shape of the lens 311 is not limited to that shown in FIGS. 13 and 14, and can be changed as appropriate.
  • the light guide member 30 may be provided with only the first projecting portion 41 that projects from at least one of the first end portion 301 and the second end portion 302 along the arrangement direction DR1.
  • “greater than” when comparing two values such as measurement data, “greater than” may be “greater than”. That is, in the comparison of two values, whether or not the two values are equal can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between “greater than” and “greater than”. Similarly, “less than” may be “less than”.
  • the proximity sensor (10) of the first aspect includes the detection section (20) and the light guide member (30).
  • the detector (20) has a light emitter (21) that emits light and a light receiver (22) that outputs an electrical signal corresponding to the incident light.
  • the light guide member (30) has a first surface (30A) facing the detection section (20), a first region (31) facing the light emitting section (21), and a first region (31) facing the light receiving section (22). It has two regions (32) and a third region (33) on the second side (30B) opposite the first side (30A).
  • the light guide member (30) guides the light incident from the first region (31) to the third region (33), emits the light from the third region (33) to the outside, and enters the light from the third region (33).
  • the light reflected by the detected object (B1) is guided to the second area (32) and emitted from the second area (32) to the light receiving section (22).
  • the second region (32) is provided with a condensing portion (321) that collects the light passing through the second region (32) onto the light receiving portion (22).
  • the light-condensing section (321) provided in the second region (32) converges the light passing through the second region (32) to the light-receiving section (22). ) can be increased, thereby improving the detection sensitivity of the detector (20). Therefore, it is possible to provide a proximity sensor (10) with improved sensitivity.
  • the condensing part (321) includes a convex condensing lens protruding toward the light receiving part (22).
  • the sensitivity can be improved by condensing the light passing through the second region (32) onto the light receiving section (22) with the convex condenser lens.
  • a translucent cover having light transmissivity disposed facing the third region (33) of the light guide member (30) (60).
  • the light guide member (30) can be protected by the translucent cover (60).
  • the light-transmitting cover (60) is provided with a light diffusion part (611) that diffuses the light transmitted through the light-transmitting cover (60). .
  • the light diffusion part (611) diffuses the light transmitted through the translucent cover (60), so that the detection target (B1) can be detected in a wider range.
  • the proximity sensor (10) of the fifth aspect, in the third or fourth aspect, further includes a light shielding part (65) arranged on the side opposite to the light guide member (30) with respect to the translucent cover (60).
  • the translucent cover (60) has a projection (61) projecting in the direction opposite to the light guide member (30).
  • the projecting portion (61) is inserted into a through hole (66) provided in the light shielding portion (65).
  • the unwanted noise light incident on the light shielding part (65) from the outside is attenuated by the light shielding part (65), so that the noise light enters the light guide member (30) through the light transmitting cover (60).
  • the detection unit (20) can reduce the possibility of incident, and suppress erroneous detection by the detection unit (20).
  • the first region (31) is provided with a lens having positive power.
  • the light can be made closer to parallel light, and is reflected by the second surface (30B) of the light guide member (30) as noise light. light can be reduced, thereby suppressing a decrease in sensitivity.
  • the lens (311) has a convex curved surface protruding toward the light emitting part (21).
  • the optical axis (AX1) of the light emitting part (21) is shifted from the position (P1) where the curvature is the minimum on the convex curved surface.
  • the light from the light emitting part (21) is irradiated toward a portion having a larger curvature than the position (P1) having the minimum curvature on the convex curved surface of the lens (311),
  • the convex curved surface By being refracted by the convex curved surface, most of the light emitted from the light emitting section (21) is guided so as to be parallel to the forward direction. Therefore, of the light emitted from the light emitting section (21), the light that is reflected on the inner surface of the light guide member (30) and becomes noise light can be reduced, and the occurrence of crosstalk can be suppressed.
  • a wiring device (1) according to an eighth aspect includes a proximity sensor (10) according to any one of the first to seventh aspects, and a control unit for controlling a device (3) based on the detection result of a detection unit (20). (50);
  • a wiring device (1) including a proximity sensor (10) with improved sensitivity it is possible to provide a wiring device (1) including a proximity sensor (10) with improved sensitivity.
  • the configurations according to the second to seventh aspects are not essential to the proximity sensor (10), and can be omitted as appropriate.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
PCT/JP2022/038834 2021-11-05 2022-10-18 近接センサ、及びそれを備える配線器具 Ceased WO2023079951A1 (ja)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0261921A (ja) * 1988-08-26 1990-03-01 Matsushita Electric Works Ltd 人体検知スイッチ
JP2004214058A (ja) * 2003-01-06 2004-07-29 Smk Corp 操作パネル入力装置
WO2008072666A1 (ja) * 2006-12-12 2008-06-19 Alps Electric Co., Ltd. 照光式入力装置
JP2017068999A (ja) * 2015-09-29 2017-04-06 シャープ株式会社 近接センサおよび電子機器
JP2019160600A (ja) * 2018-03-14 2019-09-19 オムロン株式会社 光電センサ
WO2020090883A1 (ja) * 2018-10-30 2020-05-07 京セラ株式会社 光学センサ装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006012644A (ja) * 2004-06-25 2006-01-12 Matsushita Electric Works Ltd 熱線センサ付き自動スイッチ
WO2018061583A1 (ja) * 2016-09-29 2018-04-05 富士フイルム株式会社 組成物、硬化膜、カラーフィルタ、固体撮像素子、赤外線センサ、近赤外線センサ、及び、近接センサ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0261921A (ja) * 1988-08-26 1990-03-01 Matsushita Electric Works Ltd 人体検知スイッチ
JP2004214058A (ja) * 2003-01-06 2004-07-29 Smk Corp 操作パネル入力装置
WO2008072666A1 (ja) * 2006-12-12 2008-06-19 Alps Electric Co., Ltd. 照光式入力装置
JP2017068999A (ja) * 2015-09-29 2017-04-06 シャープ株式会社 近接センサおよび電子機器
JP2019160600A (ja) * 2018-03-14 2019-09-19 オムロン株式会社 光電センサ
WO2020090883A1 (ja) * 2018-10-30 2020-05-07 京セラ株式会社 光学センサ装置

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