TW202320106A - Proximity sensor and wiring device including the proximity sensor - Google Patents

Abstract

The purpose of the present disclosure is to provide a wiring device and a proximity sensor in which sensitivity reduction is suppressed. A light guide member (30) has a first region (31) opposed to a light-emitting part of a detection unit and a second region (32) opposed to a light-receiving part of the detection unit on a first surface, and a third region (33) on a second surface. The light guide member (30) guides light having entered from the first region (31) to the third region (33), and guides the light having entered from the third region (33) and having been reflected on an object to be detected to the second region (32). The light guide member (30) has a first end (301) and a second end (302) positioned on opposing sides of the detection unit in an arrangement direction in which the light-emitting part and the light-receiving part are arranged. At least one of a first projection part (41) projecting in the arrangement direction and a second projection part (42) projecting toward the detection unit is provided to at least one of the first end (301) and the second end (302).

Description

Proximity sensor, and wiring device equipped with the proximity sensor

The invention relates to a proximity sensor and a wiring device equipped with the proximity sensor. More specifically, the present invention relates to a proximity sensor for detecting the approach of a detection object, and a wiring device equipped with the proximity sensor.

Patent Document 1 discloses a proximity sensor including a light emitting unit, a light receiving unit and a window member. The window member is arranged in front of the light emitting part and the light receiving part. The detection light emitted by the light emitting part is emitted from the window member to the outside. The reflected light of the detection light from the object to be detected enters the light receiving part through the window member.

In the proximity sensor of the aforementioned Patent Document 1, when part of the light emitted from the light emitting unit is totally reflected on the outer peripheral surface of the window member, the light totally reflected on the outer peripheral surface may enter the light receiving unit and cause crosstalk. If such crosstalk occurs, it may reduce the sensitivity of the proximity sensor. [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2017-68999

An object of the present invention is to provide a proximity sensor that suppresses a decrease in sensitivity, and a wiring device including the proximity sensor.

A proximity sensor according to an aspect of the present invention includes a detection unit and a light guide member. The detection part has a light emitting part which emits light and a light receiving part which outputs an electrical signal corresponding to the incident light. The light guide member has a first region facing the light emitting part and a second region facing the light receiving part on the first surface facing the detecting part, and has a second surface opposite to the first surface Has a 3rd zone. The first area and the second area are arranged along the arrangement direction of the light emitting part and the light receiving part. The light guide member guides the light incident from the first area to the third area and emits it to the outside from the third area, and guides the reflected light from the detection object incident from the third area to the second area. region and emits from the second region to the light receiving unit. The light guide member has a first end portion and a second end portion located on both sides of the detection portion in the arrangement direction. At least one of the first protruding portion protruding along the arrangement direction and the second protruding portion protruding toward the detecting portion is provided at least one of the first end portion and the second end portion.

A wiring device according to an aspect of the present invention includes the proximity sensor, and a control unit that controls equipment based on the detection result of the detection unit.

(implementation form) (1) Summary The drawings described in the following embodiments are schematic diagrams, and the size and thickness ratios of the components in the drawings do not necessarily reflect the actual size.

The proximity sensor 10 of this embodiment is, for example, used to detect detection objects such as human bodies and objects. In the following, the case where the detection object of the proximity sensor 10 is a human body is taken as an example for illustration, but the detection object of the proximity sensor 10 is not limited to the human body, and may also be an object.

As shown in FIG. 1 , the proximity sensor 10 includes a detection unit 20 and a light guide member 30 .

As shown in FIG. 2, the detection part 20 has the light emitting part 21 which emits light, and the light receiving part 22 which outputs the electrical signal corresponding to the incident light.

As shown in FIG. 1 and FIGS. 3 to 7 , the light guide member 30 has a first area 31 facing the light emitting unit 21 and a second area facing the light receiving unit 22 on the first surface 30A facing the detection unit 20 . 32. The light guide member 30 has a third region 33 on a second surface 30B opposite to the first surface 30A. The first region 31 and the second region 32 are provided along the arrangement direction DR1 (see FIG. 7 ) in which the light emitting parts 21 and the light receiving parts 22 are arranged. The light guide member 30 guides the light incident from the first region 31 to the third region 33 and emits it to the outside from the third region 33 . The light guide member 30 guides the reflected light from the detection object B1 (refer to FIG. 6 ) incident from the third area 33 to the second area 32 and emits it to the light receiving unit 22 from the second area 32 . The light path C1 in FIG. 6 represents the light path where the light emitted from the light emitting unit 21 exits to the space A1 through the light guide member 30 and reaches the detection object B1, and the reflected light from the detection object B1 enters the light receiving unit 22 through the light guide member 30. One example.

The light guide member 30 has a first end portion 301 and a second end portion 302 located on both sides of the detection unit 20 in the arrangement direction DR1. At least one of the first protruding portion 41 and the second protruding portion 42 is provided on at least one of the first end portion 301 and the second end portion 302 . The first protruding portion 41 protrudes along the arrangement direction DR1 from at least one of the first end portion 301 and the second end portion 302 . The second protruding portion 42 protrudes from at least one of the first end portion 301 and the second end portion 302 toward the detection portion 20 .

Here, the term "facing" the first region 31 and the light emitting part 21 is not limited to the fact that the first region 31 directly faces the light emitting part 21, and the first region 31 may also be opposite to the light emitting part 21 via one or more translucent members. The light emitting parts 21 face each other. Similarly, the so-called second region 32 "facing" the light receiving part 22 is not limited to the second region 32 directly facing the light receiving part 22, and the second region 32 may also be connected to the light receiving part 22 via one or more light transmitting members. The light receiving unit 22 faces each other. Also, the detection target B1 is a part of the human body (for example, a hand) or the like that exists within the detection range of the proximity sensor 10 in the space A1 facing the third area 33 . Moreover, the detection object B1 is not limited to a part of the human body, and can also be a movable object. The third area 33 is not limited to directly facing the space A1 where the detection object B1 is located, but may also face the space A1 via more than one light-transmitting member having light-transmitting properties. In addition, "the second protruding part 42 protrudes toward the detecting part 20" means protruding toward the direction close to the detecting part 20 in the direction in which the light guide member 30 and the detecting part 20 are arranged.

In the aspect shown in FIG. 1 and FIGS. 3 to 7 , the light guide part 40 including the first protruding part 41 and the second protruding part 42 is respectively provided on the first end part 301 and the second end part 302 . Here, the light guide part 40 has the function of guiding the noise light traveling toward the first surface 30A inside the light guide member 30 to the fourth area 34 and emitting it to the outside from the fourth area 34. The fourth area 34 includes a device At least a part of the surface of the light guide part 40 on both the first end part 301 and the second end part 302 . The noise light includes the light emitted from the first region 31 into the light emitting unit 21 inside the light guide member 30 , reflected on the second surface 30B or side surfaces of the light guide member 30 , and traveling toward the first surface 30A. (For example, the light passing through the optical paths C3 and C4 in FIG. 7). In addition, the noise light includes light incident from the third region 33 into the light guide member 30 and proceeding toward the first surface 30A, and not reflected light from the detection object B1 (for example, light passing through the optical path C2 in FIG. 7 ). . In the following embodiments, the light guide part 40 includes a first light guide part 40A provided at the first end part 301 and a second light guide part 40B provided at the second end part 302, but the light guide part 40 can also be only It is provided at one of the first end portion 301 and the second end portion 302 . In other words, in the following embodiments, at least one of the first protruding portion 41 and the second protruding portion 42 is provided at the first end portion 301 and the second end portion 302 of the light guide member 30, but it may also be provided only at the At least one of the first protruding portion 41 and the second protruding portion 42 is provided on one of the first end portion 301 and the second end portion 302 .

In addition, in the following description, the case where the proximity sensor 10 is applied to the wiring fixture 1 installed in the wall surface of a facility etc. is taken as an example and demonstrated.

The wiring device 1 includes a proximity sensor 10 including a detection unit 20 and a light guide member 30 , and a control unit 50 that controls the device 3 based on the detection result of the detection unit 20 (see FIG. 2 ).

Here, the "control" of the device 3 may be the control of switching between the power supply state to supply power to the device 3 and the power supply stop state in which the power supply to the device 3 is stopped, or the control signal may be transmitted by wired communication or wireless communication. Send it to the device 3 to control the operation status of the device 3.

Through the proximity sensor 10 of this embodiment, a part of the light emitted from the light emitting part 21 enters the inside of the light guide member 30 from the first area 31, and when it is reflected on the inner side of the light guide member 30, it passes through the light guide member 30. Part of the light reflected on the inner surface of the optical member 30 is guided to the first protrusion 41 or the second protrusion 42 , and is emitted to the outside from the first protrusion 41 or the second protrusion 42 . Also, among the light incident inside the light guide member 30 from the third area 33, a part of the light other than the reflected light from the detection object B1 is guided to the first protruding portion 41 or the second protruding portion 42, and is transmitted from the first protruding portion 41 to the second protruding portion 42. The protruding portion 41 or the second protruding portion 42 protrudes to the outside. Accordingly, among the noise light traveling toward the first surface 30A inside the light guide member 30 , the light entering the light receiving portion 22 through the second region can be reduced. Therefore, through the proximity sensor 10 of the present embodiment, the decrease in sensitivity of the proximity sensor 10 can be suppressed by suppressing false detection caused by crosstalk or noise light incident from the outside.

(2) Details Hereinafter, the proximity sensor 10 and the wiring device 1 provided with the proximity sensor 10 according to the present embodiment will be described in detail with reference to the drawings. In the following description, in FIG. 1 , the X-axis direction is defined as the left-right direction, the Y-axis direction is defined as the front-rear direction (depth direction), and the Z-axis direction is defined as the up-down direction. Furthermore, 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, and the positive direction of the Z-axis direction is defined as the upper side. However, these directions are examples, and are not used to limit the directions when the proximity sensor 10 and the wiring device 1 are used. In addition, the arrows showing the directions in the drawings are for illustration only, and do not accompany the actual objects.

(2.1) Composition First, the internal circuit of the wiring device 1 will be described with reference to FIG. 2 . Fig. 2 is a schematic block diagram of the wiring device 1 of this embodiment.

As described above, the wiring harness 1 includes the proximity sensor 10 (see FIG. 1 ) including the detection unit 20 and the control unit 50 . Moreover, the wiring device 1 further includes a pair of first terminals T11, T12, a pair of second terminals T21, T22, a switch 51, a display unit 52, a brightness sensor 53, a temperature sensor 54, and a power supply unit 55.

A power source 2 such as a commercial AC power source is connected to the pair of first terminals T11 and T12 via electric wires.

Devices 3 such as lighting fixtures are connected to the pair of second terminals T21 and T22 via electric wires.

The power supply unit 55 steps down the AC voltage input through the first terminals T11 and T12, rectifies and smoothes it, and converts it into a DC voltage of a predetermined voltage value. The power supply unit 55 supplies voltage necessary for operation to internal circuits such as the detection unit 20 , the control unit 50 , the display unit 52 , the brightness sensor 53 , and the temperature sensor 54 .

The switch 51 includes, for example, 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. In addition, the first terminal T11 and the second terminal T21 are electrically connected through an internal conductive member. Thereby, the power supply 2 and the device 3 are connected in series between both ends of the switch 51 , and the switch 51 is turned on/off to switch between the power supply state to supply power to the device 3 and the power supply stop state to stop power supply to the device 3 .

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 includes, for example, an infrared light emitting diode that emits light in an infrared region. For example, the light emitting unit 21 may be configured to continuously emit infrared light, or may be configured to emit infrared light at predetermined time intervals. The light emitted from the light emitting unit 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 unit 22 includes, for example, a photodiode having sensitivity to light in the infrared region. After the light emitted from the second region 32 of the light guide member 30 enters the light receiving unit 22 , the light receiving unit 22 converts the incident light into an electrical signal and outputs it to the detection circuit 23 . The light receiving unit 22 outputs an electric signal of a voltage level corresponding to the light quantity of the received light to the detection circuit 23 .

The detection circuit 23 detects the existence of the detection object B1 (for example, a part of the human body, etc.) based on the electric signal input from the light receiving unit 22 . The detection circuit 23 outputs a detection signal indicating the existence of the detection object B1 to the control portion 50 when the voltage level of the electrical signal output by the light receiving portion 22 is higher than a predetermined threshold. On the other hand, when the voltage level of the electrical signal output by the light receiving unit 22 is below a predetermined threshold, the detection unit 20 outputs a detection signal indicating that the detection object B1 does not exist to the control unit 50 .

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 light the protruding portion 61 of the light-transmitting cover 60 when the device 3 that is the lighting fixture is turned off. Thereby, even if the surrounding is dark, the user can still grasp the position of the protruding part 61 (that is, the position of the wiring device 1 ) through the light emission of the protruding part 61 .

The brightness sensor 53 is sensitive to light in the near-infrared region. The brightness sensor 53 has, for example, a photodiode or the like, which detects the brightness of the space A1 and outputs the detection result to the control unit 50 .

The temperature sensor 54 detects the temperature around the wiring device 1 . The temperature sensor 54 has temperature sensing elements such as a thermistor, for example. The temperature sensor 54 detects the temperature of the detection part 20 , for example, and outputs the detection result to the control part 50 .

The main structure of the control unit 50 is a computer system having more than one processor and memory. The function of the control unit 50 is realized by making the processor of the computer system execute the program stored in the memory of the computer system. The program may be stored in a memory, may be provided through a telecommunication network such as the Internet, or may be stored in a non-transitory recording medium such as a memory card and provided.

The control part 50 controls ON/OFF of the switch 51 based on the detection result of the detection part 20. Moreover, the control unit 50 turns off the light emitting diodes 521, 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, 522 when the switch 51 is turned off (that is, when the lighting fixture is turned off). 522 lights up.

Furthermore, the control unit 50 has a function of adjusting the threshold of the detection circuit 23 in response to the detection results of the brightness sensor 53 and the temperature sensor 54 . Here, the threshold of the detection circuit 23 can be switched between two stages of 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, the control unit 50 sets the threshold value of the detection circuit 23 to the first threshold value when the brightness detected by the brightness sensor 53 is darker than a predetermined first reference value. Moreover, the control unit 50 sets the threshold of the detection circuit 23 as the second threshold when the brightness detected by the brightness sensor 53 is equal to or brighter than the first reference value. When the surrounding brightness is the same as the first reference value or brighter than the first reference value, the threshold value of the detection circuit 23 is set to the second threshold value higher than the first threshold value, so it can suppress the external light (such as sunlight, etc.) The false detection of the detection circuit 23.

Moreover, the control part 50 controls the equipment 3 based on the detection result of the detection part 20 and the detection result of the temperature sensor 54. Specifically, the control unit 50 sets the threshold value of the detection circuit 23 to the first threshold value when the temperature detected by the temperature sensor 54 is lower than a predetermined second reference value. Moreover, the control part 50 sets the threshold value of the detection circuit 23 as a 2nd threshold value, when the temperature detected by the temperature sensor 54 is the same as a 2nd reference value, or is more than a 2nd reference value. 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 above the second reference value, the threshold of the detection circuit 23 is set to the first threshold higher than the first threshold. 2 threshold, so the false detection of the detection circuit 23 can be suppressed.

Next, the structure of the wiring device 1 will be described with reference to FIGS. 1 to 11 .

The wiring device 1 further includes a housing 70 including a main body 71 and a cover 72 , and a front panel 90 . The wiring device 1 is attached to the wall surface 200 (refer FIG. 6) etc. of a facility using the attachment member 100 made of synthetic resin, for example.

The installation member 100 is, for example, a dedicated installation member for large-panel switches standardized in accordance with Japanese Industrial Standards. A rectangular window hole 101 is provided at the center of the mounting member 100 , and the housing 70 of the wiring device 1 is embedded in the window hole 101 . The mounting member 100 has a pair of sidewalls 102 on left and right sides of the window hole 101 . The pair of side walls 102 are respectively provided with a total of eight fitting holes 103 at intervals in the longitudinal direction (vertical direction). Moreover, mounting pieces 104 are respectively provided on the upper and lower sides of the window hole 101 . At the center of each mounting piece 104, there is provided a long hole 105 for inserting a screw for fixing the mounting member 100 to the switch box embedded in the wall 200. In each mounting piece 104, on the side opposite to the window hole 101 with respect to the elongated hole 105, two circular holes 106 are provided at intervals in the left-right direction. Also, in each mounting piece 104, a threaded hole 107 for mounting a rectangular frame plate covering the front surface of the mounting member 100 is provided between the two circular holes 106. Also, a rectangular window hole exposing the front panel 90 is provided on the frame plate.

The mounting member 100 is fixed to the switch box embedded in the wall surface 200 with screws passing through the slot 105, or is fixed to wall surfaces such as gypsum boards by using clamping members. In addition, the mounting member 100 is fixed to a wooden wall or the like by self-tapping screws passing through the round holes 106 . In addition, a frame plate is arranged on the front surface of the mounting member 100 , and the screw passing through the hole of the frame plate is screwed into the threaded hole 107 to fix the frame plate to the mounting member 100 . The illustration of the frame plate is omitted in FIG. 1 .

The casing 70 is formed into a rectangular box shape by combining the body 71 and the cover 72 .

The body 71 constitutes the rear of the housing 70 . The main body 71 is formed, for example, in the shape of a rectangular box with an opening on the front, made of synthetic resin. On the left side and the right side of the back of the main body 71, two wire insertion holes 75 (refer to FIG. 10 ) are respectively provided for inserting power supply wires. In each pair of wire insertion holes 75 on the left side and right side of the back of the body 71, two wires connected to the first terminals T11 and T12 are inserted into the two wire insertion holes 75 on one side, and two wires connected to the first terminals T11 and T12 are inserted into the other two wire insertion holes 75. Two wires respectively connected to the second terminals T21 and T22 are inserted into the wire insertion holes 75 .

The cover body 72 constitutes the front portion of the housing 70 . The cover body 72 is formed, for example, in the shape of a rectangular box with an opening on the back of a synthetic resin. In addition, at the center of the front surface of the cover body 72, a corner hole-shaped window hole 76 exposing the third region 33 of the light guide member 30 is provided. In addition, two protrusions 77 are provided on the left and right side walls of the cover body 72 , and are respectively fitted into two fitting holes 103 provided at the center of the upper and lower direction of the left and right side walls 102 of the mounting member 100 .

On the upper side wall and the lower side wall of the cover body 72, a pair of protruding pieces 74 protruding rearward from both ends in the left and right directions are respectively provided. On the other hand, a pair of protrusions 73 are respectively provided on the upper sidewall and the lower sidewall of the main body 71 . The main body 71 and the cover 72 are joined in the front-rear direction, and the protrusion 73 of the main body 71 is fitted into the hole of the protruding piece 74 of the cover 72 to combine the main body 71 and the cover 72 to assemble the case 70 .

Components such as the first substrate 81 , the second substrate 82 , and the light guide member 30 are accommodated inside the housing 70 . The second substrate 82 is accommodated in the casing 70 so as to be located on the rear side of 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 part 20 is installed at a position corresponding to the window hole 76 of the cover body 72 . Here, the light emitting unit 21 and the light receiving unit 22 included in the detection unit 20 are arranged along the left-right direction, that is, the arrangement direction DR1. On the first substrate 81 , a long hole 83 is provided on the right side of the detection part 20 , and a round hole 84 is provided on the left side of the detection part 20 . In addition, the display unit 52 includes, for example, two light emitting diodes 521 and 522 that emit green light, and the two light emitting diodes 521 and 522 are arranged on the upper side and the lower side of the detection unit 20 , respectively.

Components such as the first terminals T11 and T12 , the second terminals T21 and T22 , and the power supply unit 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 the two pairs of wire insertion holes 75 provided on the back surface of the main body 71 .

The light guide member 30 is accommodated in the housing 70 so as to be located in front of the detection unit 20 and the two light emitting diodes 521 and 522 .

As shown in FIGS. 3 and 5 , the light guide member 30 has a rectangular parallelepiped main body 300 and two light guides respectively provided at the first end 301 on the right side of the main body 300 and the second end 302 on the left side. 40 (the first light guide part 40A and the second light guide part 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 portion 20 in the arrangement direction DR1 . The light guide part 40 is provided at at least one of the first end part 301 and the second end part 302, and guides the noise light traveling toward the first surface 30A inside the light guide member 30 to the fourth region 34 and passes through the second end part 30A. 4 Area 34 emits to the outside.

On the back surface of the main body part 300 , that is, the first surface 30A, a first region 31 is provided in a region facing the light emitting part 21 of the detection part 20 , and the light from the light emitting part 21 is incident therein.

On the first surface 30A of the main body part 300, a second area 32 is provided in the area facing the light receiving part 22 of the detection part 20, and the light emitted from the inside of the light guide member 30 through the second area 32 to the outside is incident on the light receiving part. Section 22. On the first surface 30A, the first region 31 and the second region 32 are provided along the arrangement direction DR1 . Here, the second region 32 is provided with a light collecting unit 321 that collects the light passing through the second region 32 to the light receiving unit 22 . The light collecting unit 321 includes a convex lens-shaped light collecting lens protruding toward the light receiving unit 22 . In addition, the light collecting unit 321 is not limited to include a convex lens-shaped light-collecting lens, and may be a Fresnel lens-shaped lens.

Also, on the back surface of the main body part 300, two light incident surfaces 35, 36 are provided on both sides of the first region 31 and the second region 32 in a direction (vertical direction) perpendicular to the arrangement direction DR1. The light incident surfaces 35 and 36 face the two light emitting diodes 521 and 522 mounted on the first substrate 81, respectively. The light emitted from the two light-emitting diodes 521, 522 respectively enters the inside of the light guide member 30 through the light incident surfaces 35, 36, and is guided to the third area 33 through the inside of the light guide member 30, and passes through the third area. 33 shoot outwards. The light of the light emitting diodes 521 and 522 emitted from the third area 33 is emitted to the space A1 through the light-transmitting cover 60 , so users existing in the space A1 can confirm the light-emitting diodes 521 and 522 emitted through the light-transmitting cover 60 Light.

The front of the main body 300 is formed in a rectangular shape, and the front of the main body 300 becomes the third region 33 . The front end of the main body 300 is exposed forward from the window hole 76 of the cover 72 . The third area 33 on the front side of the main body 300 faces the back side of the light-transmitting cover 60 , and the light-guiding member 30 faces the space A1 through the light-transmitting cover 60 .

The light guide part 40 (first light guide part 40A) provided at the first end part 301 includes a first protruding part 41 protruding rightward from the first end part 301 along the arrangement direction DR1, and The second protruding part 42 protrudes toward the detecting part 20 (that is, to the rear). In addition, the light guiding part 40 provided at the first end part 301 further includes a third protruding part 43 protruding from the second protruding part 42 in the direction opposite to the detecting part 20 (that is, to the right) in the arrangement direction DR1. Further, on the bottom surface of the light guide part 40 provided on the first end part 301 (that is, the bottom surfaces of the second protrusion part 42 and the third protrusion part 43 ), a rectangular parallelepiped fitting protrusion 45 protruding downward is provided.

The light guide part 40 (second light guide part 40B) provided at the second end part 302 includes the first protruding part 41 protruding leftward from the second end part 302 along the arrangement direction DR1, and the first protruding part 41 behind the first protruding part 41. The second protruding part 42 protrudes toward the detecting part 20 (that is, to the rear). Moreover, the light guide part 40 provided at the second end part 302 further includes a third protrusion part 43 protruding from the second protrusion part 42 in the direction opposite to the detection part 20 (ie, leftward) in the arrangement direction DR1. In addition, a cylindrical fitting protrusion 46 protruding downward is provided on the bottom surface of the light guide part 40 provided on the second end part 302 (that is, the bottom surface of the second protrusion part 42 and the third protrusion part 43 ).

As described above, the light guide part 40 includes the first protruding part 41 protruding from both the first end part 301 and the second end part 302 along the arrangement direction DR1, but it may be only at the first end part 301 and the second end part. One of the portions 302 is provided with the first protruding portion 41 . That is, it is only necessary for the light guiding portion 40 to include the first protruding portion 41 protruding from at least one of the first end portion 301 and the second end portion 302 along the arrangement direction DR1, and the fourth region 34 includes the portion of the first protruding portion 41. An area of at least a portion of a surface.

In addition, the light guide part 40 includes the second protruding part 42 protruding from both directions of the first end part 301 and the second end part 302 to the detection part 20, but it may be only at the first end part 301 and the second end part 302. One of them is provided with the second protrusion 42 . That is, it is only necessary for the light guiding part 40 to include the second protruding part 42 protruding from at least one of the first end part 301 and the second end part 302 toward the detection part 20, and the fourth region 34 includes the second protruding part 42. An area of at least a portion of a surface. In other words, in the light guide member 30 , the second protruding portion 42 may be provided only on at least one of the first end portion 301 and the second end portion 302 .

Also, in this embodiment, the first protruding portion 41 and the second protruding portion 42 are provided on the first end portion 301 and the second end portion 302 respectively, and the first protruding portion 41 and the second protruding portion 42 are connected in one piece. Therefore, the noise light can be guided from the first protruding portion 41 to the second protruding portion 42 and emitted from the surface of the second protruding portion 42 to the outside. Also, in the present embodiment, the first protruding portion 41 and the second protruding portion 42 are respectively provided on the first end portion 301 and the second end portion 302, but it is also possible to place the first end portion 301 and the second end portion 302 At least one of the first protrusions 41 and the second protrusions 42 are provided.

In addition, the light guide part 40 further includes a third protrusion part 43 protruding from the second protrusion part 42 in the direction opposite to the detection part 20 in the arrangement direction DR1. In other words, in the light guide member 30, the second protruding portion 42 and the third protruding portion 43 are respectively provided at the first end portion 301 and the second end portion 302, so that noise light can be guided from the second protruding portion 42 to the third protruding portion. The portion 43 is projected from the surface of the third protruding portion 43 to the outside.

Here, in the state where the fitting protrusion 45 is inserted into the elongated hole 83 of the first substrate 81, and the fitting protrusion 46 is inserted into the round hole 84 of the first substrate 81, the light guide is connected by an appropriate method such as bonding or pressing. The component 30 is fixed on the front surface of the first substrate 81 . When the light guide member 30 is fixed on the front surface of the first substrate 81 , the light emitting portion 21 of the detection unit 20 faces the first area 31 , and the light receiving portion 22 of the detection unit 20 faces the second area 32 . Moreover, 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 area 31 , and is emitted to the outside from the third area 33 . In addition, the light emitted from the third area 33 to the outside is reflected by the detection object B1 existing in the space A1, enters the inside of the light guide member 30 from the third area 33, and then enters the inside of the light guide member 30. The light is guided to the second region 32 , is emitted from the second region 32 to the outside, and enters the light receiving unit 22 .

The housing 70 is inserted into the window hole 101 of the mounting member 100 from the rear side, and the two protrusions 77 on the left and right side walls of the cover 72 are inserted into the two fitting holes 103 on the left and right side walls 102, and the housing 70 is installed on the The member 100 is installed. When the housing 70 is mounted on the mounting member 100 , the front portion of the cover 72 protrudes forward from the window hole 101 of the mounting member 100 .

As shown in FIGS. 1 and 9 , the front panel 90 is formed in a rectangular shape from synthetic resin. At the center of the front of the front panel 90 , a corner-shaped window hole 92 is provided at a position corresponding to the window hole 76 of the cover body 72 . As shown in FIG. 11, on the back of the front panel 90, two hooks 91 protruding rearward from the left and right sides are provided. The front panel 90 is attached to the front side of the cover body 72 by engaging the left and right hooks 91 with the recesses 78 provided on the left and right sides of the cover body 72 .

On the back surface of the front panel 90, a light-transmitting cover 60 (see FIG. 1 ) and a light shielding portion 65 (see FIG. 1 ) are attached. In this embodiment, the proximity sensor 10 further includes a translucent cover 60 disposed opposite to the third region 33 of the light guide member 30 . The light-transmitting cover 60 is disposed on the front side of the light-guiding member 30 , so the light-guiding member 30 can be protected through the light-transmitting cover 60 .

The light-transmitting cover 60 is made of light-transmitting synthetic resin such as polycarbonate resin or acrylic resin. The light-transmitting cover 60 is rectangular in shape when viewed from the front side. In the center of the front of the light-transmitting cover 60, there is provided a platform-shaped protruding portion 61 inserted into the window hole 92 of the front panel 90. In other words, the light-transmitting cover 60 has a protruding portion 61 protruding in the opposite direction of the light guide member 30 .

Here, the light-diffusing part 611 which diffuses the light transmitted through the light-transmitting cover 60 is provided in the light-transmitting cover 60. As shown in FIG. The light diffusing part 611 has, for example, fine concavo-convex shapes formed on the surface of the protruding part 61 , and the light passing through the light-transmitting cover 60 can be diffused by the light diffusing part 611 . The angle θ1 in Figure 7 is the diffusion angle of the light emitted from the light-transmitting cover 60 when the light-diffusing portion 611 is not provided, and the angle θ2 in FIG. 7 is the diffusion angle of the light emitted from the light-transmitting cover 60 when the light-diffusing portion 611 is provided. . When the light diffusion part 611 is not provided, the diffusion angle of the light emitted from the light-transmitting cover 60 is relatively narrow, so even if the hand is close to the wiring device 1, if the position of the hand deviates from the front of the protruding part 61, the detection part 20 is still not easy to detect. Detect hands. In contrast, in this embodiment, the protruding portion 61 is provided with a light diffusion portion 611, so the diffusion angle of the light emitted from the light-transmitting cover 60 can be enlarged, and it is easier to detect the detection object, that is, the human body (such as a hand, etc.). ) for detection.

In addition, in the light-transmitting cover 60 , elongated holes 62 extending in the vertical direction are respectively provided on the left and right sides of the protruding portion 61 .

Moreover, the wiring device 1 further has the light shielding part 65 arrange|positioned at the side opposite to the light guide member 30 with respect to the light transmissive cover 60. As shown in FIG. The light-shielding portion 65 is formed in a rectangular plate shape with a synthetic resin having a light transmittance lower than that of the front panel 90 , for example, formed in a black color that hardly transmits visible light. The light shielding portion 65 is disposed between the back surface of the front panel 90 and the light-transmitting cover 60 . In the center of the light-shielding portion 65, a quadrangular through-hole 66 through which the protruding portion 61 of the light-transmitting cover 60 passes is provided. That is, the protruding portion 61 is inserted into the through hole 66 provided in the light shielding portion 65 . In addition, two through-holes 67 are provided in the light-shielding portion 65 at positions corresponding to the two elongated holes 62 provided in the light-transmitting cover 60 , respectively.

On the back of the front panel 90, as shown in Figure 6 and Figure 11, two protrusions 93 are provided on the left and right sides of the window hole 92, and the light-transmitting cover 60 and the light-shielding part 65 are installed on the front panel by using the two protrusions 93 90 on the back side. The two protrusions 93 are respectively inserted into the through hole 67 and the elongated hole 62 , and the light shielding portion 65 and the light-transmitting cover 60 are stacked on the back surface of the front panel 90 . Here, the light shielding portion 65 is disposed between the back surface of the front panel 90 and the light-transmitting cover 60 . Then, pressure or heat is applied to the front ends of the two protrusions 93 protruding from the back of the light-transmitting cover 60 to press them tightly, thereby fixing the light-transmitting cover 60 and the light-shielding portion 65 to the back of the front panel 90 . When the light-transmitting cover 60 and the light-shielding portion 65 are mounted on the front panel 90 , the front surface of the protruding portion 61 of the light-transmitting cover 60 is exposed forward from the window 92 of the front panel 90 .

(2.2) Action description The operation of the wiring device 1 of this embodiment will be described below.

The wiring device 1 of this embodiment is used for operating equipment 3 .

The light emitting part 21 of the proximity sensor 10 included in the wiring device 1 emits light continuously or periodically, and the emitted light of the light emitting part 21 is irradiated to the space A1 through the light guide member 30 and the light transmissive cover 60 .

When the power supply to the lighting fixture, that is, the equipment 3 is stopped, when the user puts his hand close to the protruding part 61 of the light-transmitting cover 60 exposed from the window 92 of the front panel 90, the reflection reflected by the user's hand is The light enters the light receiving unit 22 through the light transmissive cover 60 and the light guide member 30 . The detection circuit 23 outputs a detection signal indicating the presence of the detection object B1 to the control unit 50 when the signal level of the voltage signal output from the light receiving unit 22 is higher than the threshold value. At this time, the control part 50 turns on the switch 51 based on the detection signal input from the detection circuit 23, switches to the power supply state which supplies electric power to the equipment 3, and turns on the equipment 3 which is a lighting fixture. The control unit 50 turns off the light emitting diodes 521 and 522 included in the display unit 52 when switching from the power supply stop state to the power supply state.

Moreover, in the power supply state of supplying power to the lighting fixture, that is, the equipment 3, when the user puts his hand close to the protruding portion 61 of the light-transmitting cover 60, the reflected light reflected by the user's hand passes through the light-transmitting cover 60 and the light guide member. 30 and incident on the light receiving unit 22. The detection circuit 23 outputs a detection signal indicating the presence of the detection object B1 to the control unit 50 when the signal level of the voltage signal output from the light receiving unit 22 is higher than the threshold value. At this time, the control unit 50 turns off the switch 51 based on the detection signal input from the detection circuit 23 , switches to the power supply stop state in which the power supply to the device 3 is stopped, and turns off the device 3 which is a lighting fixture. The control unit 50 turns on the light emitting diodes 521 and 522 included in the display unit 52 when switching from the power supply state to the power supply stop state.

In this embodiment, the protruding portion 61 of the light-transmitting cover 60 is provided with a light-diffusing portion 611, so the diffusion angle of the light emitted from the light-transmitting cover 60 to the space A1 is wider, and the detection object B1 can be enlarged and detected. range, and enhance usability.

Also, a lens with a positive refractive power is provided in the first area 31 of the light guide member 30, so that the light passing through the first area 31 can be close to parallel light, and the inward reflection on the second surface 30B of the light guide member 30 can be reduced. light, while suppressing crosstalk. Moreover, by reducing the light reflected inwardly on the second surface 30B of the light guide member 30, the light emitted forward from the third area 33 is increased, so even if the light diffusion part 611 enlarges the diffusion angle of the light, it can still improve the light from the second surface 30B. The intensity of the light emitted by the light-transmitting cover 60 improves the detection sensitivity of the detection part 20 .

Moreover, the light-collecting portion 321 is provided in the second region 32 of the light-guiding member 30 , so the intensity of light incident on the light-receiving portion 22 can be increased, and the detection sensitivity of the detection portion 20 can be improved.

Furthermore, the 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 protrudes forward through the through-hole 66 of the light-shielding portion 65 . Thereby, the light-shielding portion 65 can weaken the unwanted noise light that penetrates the front panel 90 and enters the light-shielding portion 65, thereby reducing the possibility of the noise light entering the light guide member 30 through the light-transmitting cover 60, and suppressing detection. False detection by the measuring unit 20.

(3) Variations The above-mentioned embodiments are only examples of various embodiments of the present invention. As long as the above-mentioned implementation can achieve the purpose of the present invention, various changes can be made in response to the design and the like.

Modifications of the above-mentioned embodiments are listed below. Modifications described below can be used in combination as appropriate.

In the wiring harness 1 of the present invention, the control unit 50 and the like include a computer system. The hardware of a computer system is mainly composed of a processor and a memory. The function of the control unit 50 of the present invention is realized by making the processor execute the program stored in the memory of the computer system. The program can be stored in the memory of the computer system in advance, can also be provided through the telecommunications network, and can also be stored in non-transitory recording media such as memory cards, CDs, and hard disks that can be read by the computer system and provided. The processor of a computer system is composed of one to multiple electronic circuits including semiconductor integrated circuits (IC) or large scale integrated circuits (LSI). The so-called integrated circuits such as IC or LSI here vary according to the degree of integration, including system LSI, VLSI (Very Large Scale Integration, ultra-large integrated circuit) or ULSI (Ultra Large Scale Integration, very large integrated circuits). Furthermore, the FPGA (Field-Programmable Gate Array, Field Programmable Logic Gate Array) programmed after the manufacture of the LSI is a theoretical device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit area inside the LSI. It can also be used as a processor. A plurality of electronic circuits can be concentrated in one chip, or dispersed in a plurality of chips. Multiple chips can be concentrated in one device, or dispersed in multiple devices. The so-called computer system here includes a microcontroller with more than one processor and more than one memory. Thus, microcontrollers are also composed of one to a plurality of electronic circuits including semiconductor integrated circuits or large-scale integrated circuits.

In the above-mentioned embodiment, the first protruding portion 41 is provided on the first end portion 301 and the second end portion 302 of the light guide member 30 respectively, and the second protruding portion 42 is further provided from the first protruding portion 41 to the detection portion 20 , but the first protruding portion 41 is not an essential structure. That is, in the light guide member 30 , only the second protruding portion 42 protruding from at least one of the first end portion 301 and the second end portion 302 toward the detection portion 20 may be provided.

Fig. 12 shows the light guide member 30 of Modification 1. In Modification 1, on the back side of the main body 300 of the light guide member 30, there are provided detectors protruding from the outside of the first area 31 and the second area 32 to the detection portion 20 respectively. The second protruding portion 42, and the third protruding portion 43 protruding from the second protruding portion 42 to the opposite direction of the detecting portion 20. Here, the portion of the main body 300 located outside the first region 31 and the second region 32 in the arrangement direction DR1 serves as the guide portion 47 for guiding light to the second protrusion 42 . In this modification 1, it is also possible to guide the noise light to the second protruding portion 42 and the third protruding portion 43 , thereby suppressing false detection by the proximity sensor 10 . Also, in Modification 1 shown in FIG. 12 , the second protruding portion 42 and the third protruding portion 43 are provided on both the first end portion 301 and the second end portion 302, but the first end portion 301 and the third protruding portion 43 may also be provided. At least one of the second end portion 302 is provided with the second protruding portion 42 and the third protruding portion 43 . In addition, in the light guide member 30 of Modification 1, the third protrusion 43 is not an essential configuration, and the light guide member 30 may be provided with only the second protrusion 42 .

In addition, in the above-mentioned embodiment and Modification 1, it is preferable to provide a lens having a positive refractive power in the first region 31 . 13 and 14 show a light guide member 30 according to Modification 2. In the light guide member 30 according to Modification 2, a lens 311 having a positive refractive power is provided in the first region 31 . The lens 311 is, for example, a convex lens with a convex surface protruding toward the light emitting unit 21 . That is, the lens 311 has a convex curved surface protruding toward the light emitting part 21 . The optical path C5 in FIG. 14 represents the optical path of the light emitted from the light emitting unit 21 , and the optical path C6 in FIG. 14 represents the optical path of the light incident on the light receiving unit 22 . The lens 311 has a positive refractive power, so the diffusion and convergence of the light emitted from the light-emitting part 21 and incident into the light guide member 30 from the first area 31 can be converged to be close to parallel light, so it can reduce contact with the side wall of the light guide member 30, etc. And the light incident on the light receiving portion 22 suppresses the occurrence of crosstalk.

Here, the optical axis AX1 of the light emitting unit 21 deviates from the position P1 where the curvature is the smallest on the convex surface of the lens 311 . The optical axis AX1 of the light emitting unit 21 is, for example, the axis of rotational symmetry of the light beam emitted from the light emitting unit 21 . In this embodiment, the lens 311 and the light emitting unit 21 are arranged so that the optical axis AX1 is directed toward a position closer to the second region 32 than the position P1 having the smallest curvature. Thereby, the light from the light emitting unit 21 is irradiated to the portion of the convex surface of the lens 311 whose curvature is greater than the position P1, and is refracted on the convex surface, and most of the light emitted from the light emitting unit 21 is guided parallel to the front direction. Therefore, among the light emitted from the light emitting unit 21 , the light reflected on the inner surface of the light guide member 30 to become noise light can be reduced, thereby suppressing the occurrence of crosstalk. In the example shown in FIG. 14, the lens 311 and the light emitting unit 21 are arranged so that the optical axis AX1 faces a position closer to the second region 32 than the position P1, but the lens 311 and the light emitting unit 21 may be arranged so that The optical axis AX1 is arranged so as to face a position farther from the second region 32 than the position P1.

The lens 311 is not limited to the shape shown in FIGS. 13 and 14 and can be changed as appropriate.

Moreover, only the 1st protrusion part 41 which protrudes along the arrangement direction DR1 from at least one of the 1st end part 301 and the 2nd end part 302 may be provided in the light guide member 30.

In the above embodiment, when comparing two values such as measurement data, "above" may be replaced with "greater". That is, when comparing two values, whether or not the two values are equal can be changed arbitrarily depending on the setting of the reference value, etc., so there is no technical difference between "above" or "greater". Similarly, "less than" can be replaced with "below".

(Summarize) As described above, the proximity sensor (10) of the first aspect includes a detection unit (20) and a light guide member (30). The detection unit (20) has a light emitting unit (21) emitting light and a light receiving unit (22) outputting an electric signal corresponding to the incident light. The light guide member (30) has a first area (31) facing the light emitting part (21) and a second area facing the light receiving part (22) on the first surface (30A) facing the detection part (20) (32), and has a third region (33) on the second surface (30B) opposite to the first surface (30A). The first region (31) and the second region (32) are arranged along the arrangement direction (DR1) in which the light emitting parts (21) and the light receiving parts (22) are arranged. The light guide member (30) guides the light incident from the first area (31) to the third area (33) and emits it to the outside from the third area (33), and guides the incident light from the third area (33) to the outside The reflected light of the measurement object (B1) is guided to the second area (32) and emitted from the second area (32) to the light receiving unit (22). In the light guide member (30), at least one of the first end (301) and the second end (302) on both sides of the detection part (20) in the arrangement direction (DR1) is provided with a At least one of the first protruding portion (41) protruding in the arrangement direction (DR1) and the second protruding portion (42) protruding toward the detection portion (20).

With this aspect, the decrease in sensitivity can be suppressed.

In the proximity sensor (10) of the second aspect, for the light guide member (30) in the first aspect, at least one of the first end (301) and the second end (302) is provided with a second 1 protruding part (41) and the 2nd protruding part (42).

Through this aspect, by guiding the noise light to the first protruding portion (41) and the second protruding portion (42), the noise light incident on the light receiving portion (22) can be reduced, and the sensitivity reduction caused by it can be suppressed.

In the proximity sensor (10) of the third aspect, the first protruding portion (41) and the second protruding portion (42) of the second aspect are connected together.

With this aspect, the decrease in sensitivity can be suppressed.

In the proximity sensor (10) of the fourth aspect, for the light guide member (30) of any one of the first to third aspects, in the first end (301) and the second end (302) At least one of them is provided with at least a second protruding portion (42) and a third protruding portion (43) protruding from the second protruding portion (42) to the opposite direction of the detecting portion (20) in the arrangement direction (DR1).

Through this aspect, the noise light is guided to the third protruding portion (43), thereby reducing the noise light incident on the light receiving portion (22), and suppressing the decrease in sensitivity caused by it.

In the proximity sensor (10) of the fifth aspect, for the light guide member (30) of any one of the first to fourth aspects, the first end (301) and the second end (302) respectively At least one of the first protrusion (41) and the second protrusion (42) is provided.

Through this aspect, at least one of the first protruding part (41) and the second protruding part (42) is provided on the first end part (301) and the second end part (302), respectively, so that the incidence to the light receiving part can be reduced. (22) Noise light, and suppress it to cause a decrease in sensitivity.

In the proximity sensor (10) of the sixth aspect, in any one of the first to fifth aspects, a lens (311) with positive refractive power is provided in the first area (31).

Through this aspect, the diffusion of the light passing through the first region (31) can be narrowed to approach parallel light, and the light reflected on the second surface (30B) of the light guide member (30) to become noise light can be reduced , and suppress it to cause a decrease in sensitivity.

In the proximity sensor (10) of the seventh aspect, the lens (311) in the sixth aspect has a convex curved surface protruding toward the light emitting part (21). The optical axis (AX1) of the light emitting part (21) deviates from the position (P1) where the curvature is the smallest in the convex curved surface.

Through this aspect, the light from the light-emitting part (21) is irradiated to the part of the convex surface of the lens (311) whose curvature is greater than the position (P1) of the minimum curvature, so by refraction on the convex surface, the light from the light-emitting part (21) Most of the emitted light is guided parallel to the forward direction. Therefore, among the light emitted from the light emitting part (21), the light reflected on the inner side surface of the light guide member (30) to become noise light can be reduced, and the occurrence of crosstalk can be suppressed.

The proximity sensor (10) of the eighth aspect is in any one of the first to seventh aspects, and further has a light-transmitting sensor arranged opposite to the third area (33) of the light guide member (30). Light cover (60).

Through this aspect, the light guide member (30) can be protected through the light-transmitting cover (60).

In the proximity sensor (10) of the ninth aspect, the light diffusion part (611) for diffusing the light passing through the light transmission cover (60) is provided on the light transmission cover (60) of the eighth aspect.

Through this aspect, the light diffusion part (611) diffuses the light passing through the light-transmitting cover (60), so the detection range of the detection object (B1) can be enlarged.

The wiring device (1) of the tenth aspect is provided with the proximity sensor (10) of any one of the first to ninth aspects, and the control of the control device (3) based on the detection result of the detection part (20) Ministry (50).

Through this aspect, it is possible to provide a wiring device (1) provided with a proximity sensor (10) that suppresses a decrease in sensitivity.

The wiring device (1) of the eleventh aspect further includes a brightness sensor (53) sensitive to light in the near-infrared region in the tenth aspect. The control part (50) controls the device (3) based on the detection result of the detection part (20) and the detection result of the brightness sensor (53).

Through this aspect, the detection result of the brightness sensor (53) can be used for the control of the device (3).

The wiring device (1) of the twelfth aspect is further equipped with a temperature sensor (54) for detecting temperature in the tenth aspect. The control part (50) controls the device (3) based on the detection result of the detection part (20) and the detection result of the temperature sensor (54).

Through this aspect, the detection result of the temperature sensor (54) can be used for the control of the equipment (3).

The configurations according to the second to ninth aspects are not necessary for the proximity sensor (10), and can be appropriately omitted. The configurations according to the eleventh to the twelfth aspects are not necessary for the wiring device (1), and can be appropriately omitted.

1: Wiring equipment 2: Power 3: Equipment 10: Proximity sensor 20: Detection department 21: Luminous department 22: Light receiving part 23: Detection circuit 30: Light guide member 30A:Side 1 30B: Side 2 31: Area 1 32:Second area 33: Area 3 34: Area 4 35: Light incident surface 36: Light incident surface 40: Light guide part 40A: The first light guide part 40B: The second light guide part 41: 1st protrusion 42: 2nd protrusion 43: 3rd protrusion 45: Chimeric protrusions 46: Chimeric protrusions 47: Guidance department 50: Control Department 51: switch 52: Display part 53:Brightness sensor 54:Temperature sensor 55: Power supply department 60: Transparent cover 61: protrusion 62: long hole 65: shading part 66: Through hole 67: Through hole 70: Shell 71: Ontology 72: cover body 73:Protrusion 74: protruding piece 75: Wire insertion hole 76: window hole 77:Protrusion 78: Concave 81: 1st substrate 82: Second substrate 83: long hole 84: round hole 90: front panel 91: hook 92: window hole 93:Protrusion 100: Install components 102: side wall 103: Fitting hole 104: Mounting sheet 105: long hole 106: round hole 107: threaded hole 200: wall 300: main body 301: 1st end 302: the second end 311: lens 321: Gathering Department 521: light emitting diode 522: light emitting diode 611: Light Diffusion Department T11: 1st terminal T12: 1st terminal T21: 2nd terminal T22: 2nd terminal A1: space B1: detection object C1: light path C2: light path C3: light path C4: light path C5: light path C6: light path DR1: arrangement direction AX1: optical axis P1: position θ1: angle θ2: angle

FIG. 1 is an exploded perspective view of a wiring device equipped with a proximity sensor according to an embodiment of the present invention. Fig. 2 is a block diagram of the same wiring device. Fig. 3 is a bottom view of the light guide member provided by the proximity sensor as above. Fig. 4 is the rear view of the same light guide member. Fig. 5 is a perspective view of the appearance of the same light guide member. Fig. 6 is a sectional view of the same wiring device. Fig. 7 is an enlarged view of part A of Fig. 6 . Fig. 8 is a three-dimensional view of the appearance of the same wiring device. Fig. 9 is the front view of the same wiring appliance. Fig. 10 is the rear view of the same wiring appliance. Fig. 11 is the rear view of the outer cover of the same wiring appliance. FIG. 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 a proximity sensor according to Modification 2. FIG.

30: Light guide member

31: Area 1

32:Second area

33: Area 3

34: Area 4

40: Light guide part

40A: The first light guide part

40B: The second light guide part

41: 1st protrusion

42: 2nd protrusion

43: 3rd protrusion

45: Chimeric protrusions

46: Chimeric protrusions

300: main body

301: 1st end

302: the second end

Claims (12)

A proximity sensor comprising: The detection unit includes a light-emitting unit that emits light and a light-receiving unit that outputs an electrical signal corresponding to the incident light; and The light guide member has a first region facing the light emitting part and a second region facing the light receiving part on a first surface facing the detecting part, and has a second surface opposite to the first surface Having a third area, the first area and the second area are arranged along the arrangement direction of the light-emitting part and the light-receiving part; The light guide member guides the light incident from the first area to the third area and emits it to the outside from the third area, and guides the reflected light from the detection object incident from the third area to the third area. 2 area and emit from the second area to the light receiving part; The light guide member has a first end portion and a second end portion located on both sides of the detection portion in the arrangement direction; At least one of the first protruding portion protruding along the arrangement direction and the second protruding portion protruding toward the detecting portion is provided at least one of the first end portion and the second end portion. The proximity sensor as claimed in item 1, wherein, In the light guide member, the first protruding portion and the second protruding portion are provided on at least one of the first end portion and the second end portion. The proximity sensor as claimed in item 2, wherein, The first protruding portion and the second protruding portion are connected in one body. The proximity sensor according to any one of claims 1 to 3, wherein, On the light guide member, at least one of the first end portion and the second end portion is provided with at least the second protruding portion and the third protruding portion; The third protruding portion protrudes from the second protruding portion in the direction opposite to the detecting portion in the arrangement direction. The proximity sensor according to any one of claims 1 to 3, wherein, In the light guide member, at least one of the first protruding portion and the second protruding portion is provided on the first end portion and the second end portion, respectively. The proximity sensor according to any one of claims 1 to 3, wherein, A lens with positive refractive power is provided in the first area. The proximity sensor as claimed in item 6, wherein, The lens has a convex curved surface protruding toward the light emitting part; The optical axis of the light emitting part deviates from the position where the curvature is the smallest in the convex curved surface. The proximity sensor as described in any one of claims 1-3, further comprising: The light-transmitting cover is disposed opposite to the third region of the light-guiding member, and has light-transmitting properties. The proximity sensor as claimed in item 8, wherein, A light diffusion part for diffusing light passing through the light transmission cover is provided on the light transmission cover. A wiring device, comprising: The proximity sensor according to any one of claims 1-9; and, The control unit controls the equipment based on the detection result of the detection unit. The wiring device described in Claim 10 further includes: Brightness sensor, sensitive to light in the near-infrared region; The control unit controls the device based on the detection result of the detection unit and the detection result of the brightness sensor. The wiring device described in Claim 10 further includes: Temperature sensor to detect temperature; The control unit controls the device based on the detection result of the detection unit and the detection result of the temperature sensor.

Images