JPH03289910A - Kitchen device - Google Patents

Abstract

PURPOSE:To prevent the malfunction of a reflective photoelectric sensor due to disturbance light, and the occurrence of erroneous lighting in an unconscious condition by positioning the light emitting and receiving section as integral part of the sensor comprising a projector for emitting the predetermined level of a light signal and a light receiver at the front end of an illumination device. CONSTITUTION:A main power switch 24 for an illumination body 13 is provided aft of the right side bottom thereof, or at a position on a line extended aft from the installation position of a light emitting and receiving section 20. The light emitting and receiving section 20 of a reflective photoelectric sensor is positioned on the front of the illumination body 13 as aforementioned and, therefore, free from malfunction due to receipt of incident light (a) from an auxiliary lighting window 32 provided on a rear wall between a top plate 26 and a hanging door 27. In addition, an illumination cover 22 is made of opaque translucent material for brightly lighting forward of the top plate 26. Although the area forward of the top plate 26 is naturally illuminated brightly with light from a fluorescent lamp 14, the shade of the light emitting and receiving section 20 does not appear on the front of the illumination cover 22, when the light emitting and receiving section 20 is positioned at the front. Also, good appearance can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a lighting device which has the function of a reflective photoelectric sensor and which blinks in response to reflected waves from an object, such as an operator's hand. The present invention relates to a kitchen device including the device.

Conventional technology In the past, lighting for this type of kitchen equipment was often done with wet or dirty hands or while holding objects during cooking operations, and from the viewpoint of hygiene and prevention of dangers such as electric shock, it was necessary to turn on the lighting directly. BACKGROUND ART BACKGROUND ART In recent years, devices equipped with a non-contact operation switch that allow the light source to be turned on and off without touching the operation part have been developed.

Hereinafter, a conventional lighting device with a lighting function using a non-contact switch will be described.

First, the configuration of the lighting device will be explained with reference to FIGS. 6 and 7. As shown in FIG. 6, the lighting device 1 is fixed to the lower surface of a hanging door 2 fixed to at least one wall surface,
It serves as a light source that illuminates the area around the cooking surface of the top plate 4 attached to the cabinet 3. Inside this lighting device,
As shown in FIG. 7, from a fluorescent lamp 6 serving as a light source, a lighting circuit 6 for the fluorescent lamp 6 consisting of a ballast, a lighting tube, etc., a detection section 7 consisting of elements such as a pyroelectric sensor and a photo sensor, and a detection section 7. A sensor control unit 8 and the like is provided to perform important control of the power supply to the lighting circuit 6 in response to the detection number 100, and a detection window is provided on the bottom surface of the lighting body 1 for the detection unit 7 to receive a detection signal from the outside. 9 is provided. In addition, considering the light distribution characteristics in the front and back direction of the top plate 4, the lighting device 1 has a front part made of transparent material so that it can illuminate not only the top plate 4 below the installation position but also the front side of the top plate 4. It is formed of an acrylic cover 10 by .

Therefore, the detection range of the lighting device 1 having the above configuration is as follows:
As shown by the hatched area 11 within the dotted line in FIG. A detects the blind symbol and sends it to the lighting circuit 6 via the sensor control unit 8.
The configuration is such that power is supplied to the fluorescent lamp 6 and the fluorescent lamp 6 is turned on.

Problems to be Solved by the Invention However, in such a configuration, since the detection window 9 is provided on the lower surface of the illumination device 1, its position is difficult to determine, which causes operational inconvenience. In particular, if the sensor is a type that detects near-infrared rays using Conuto's cheap reflective photoelectric sensor, the light beams emitted by itself may be transmitted to objects such as the top plate 4 or objects placed on the top plate 4 by the user unconsciously. It is conceivable that the light may be reflected and picked up and cause a malfunction, and there are cases where an auxiliary light window 12 is provided on the wall between the top plate 4 and the hanging door 2, and in such a case, When the light a entering through the window 12 is strong, the light a directly enters the detection section 7, causing a problem of malfunction.

The present invention solves these problems, and when using a reflective photoelectric sensor that receives near-infrared rays as a sensor,
The purpose is to prevent inconveniences such as malfunctions due to the influence of ambient light and erroneous lighting in an unconscious state.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a constant level of light@
The light emitting/receiving part of a reflective photoelectric sensor is installed in parallel at the front end of the illumination device. If the lighting device is provided with a main power switch for the lighting device that also serves to supply power to the flashing means of the fluorescent lamp by the sensor, the main power switch is used to connect the light emitting and receiving light of the sensor. It is designed to be installed near the section.

Effect of the Invention The present invention has the above-mentioned configuration, and by bringing the light emitting/receiving part of the reflective photoelectric sensor to the front end of the lighting device, it is possible to prevent damage to the top plate or to pots and tableware placed unconsciously on the top plate by the user. The light from the projector is reflected, and the receiver picks up the reflected wave, causing malfunctions.In addition, the incident light from the lighting auxiliary window installed on the top plate and the back wall of the hanging moon may interfere with the projection and reception. There is no problem of malfunctions caused by the light being incident on the parts. In addition, the transparent material on the front of the lighting device becomes bright by transmitting the light from the light source when the light source is turned on, but the light from the light source naturally attenuates towards the edges, forming a dark area. ing. Therefore, since the light emitting/receiving section is disposed at the end of the front surface of the illumination device, the shadow cast by the light emitting/receiving section on the transparent material is absorbed in the dark area and is not noticeable, resulting in an aesthetically pleasing appearance. It can also be secured. Furthermore, when the lighting device is provided with its own main power switch that also serves to supply power to the flashing means of the light source by the reflective photoelectric sensor, the main power switch is connected to the light emitting/receiving section. By arranging the light source nearby, when the main power switch is turned off and the light source is to be turned on, the main power switch is turned on, the blinking means by the sensor is turned on, and then the light source is turned on by the sensor. It is also possible to improve operability by shortening the range of motion of the user's hand during operation, allowing smoother operation.

Embodiment The structure of a lighting device according to an embodiment of the present invention will be explained below with reference to FIGS. 1, 2, and 3.

First, as shown in FIGS. 1 and 2, the lighting device 13
Inside the main body, there is a fluorescent lamp 14 serving as a light source, a lighting circuit 16 for the fluorescent lamp 14 consisting of a ballast, a lighting tube, etc., an infrared light emitting diode 16, and an oscillator that makes the infrared light emitting diode 16 emit pulses at a constant level cycle. (not shown), etc., and a photodiode 18 and an amplifier (not shown) that amplifies the electrical signal from the photodiode 18 to a certain level.
The power source of the lighting circuit 15 receives the detection signal from the light emitting/receiving section 20 of a so-called reflective photoelectric sensor which is arranged in parallel with the light receiving device 19 in the light emitting/receiving section 2o and is housed integrally in a case. Sensor control unit 2 that controls supply on/off
The light emitting/receiving part 2 is fixed to the right end of the front cover 22 made of a translucent material of the illumination device body 13 in close contact with the front cover 22 from the back side. The part is perforated in a rectangular shape so that near-infrared light projected or received by the light emitting/receiving part 2o can pass therethrough, and a transparent acrylic plate is fitted into the rectangular perforation so as to completely cover the perforation. By doing so, a sensor detection window 23 is formed. In addition, the right side bottom rear part of the lighting body 13 is
, b The illumination device 1 is configured to turn on/off the power supply to the sensor control unit 21, that is, to set the sensor function to ○N-OFF, so as to be located on the rear extension line of the mounting position of the light emitting/receiving unit 2o.
Three main power switches 24 are provided. The lighting device 13 having the above structure includes a top plate 26 attached to an equipment cabinet 25 as shown in FIG. It is installed by being fixed to the lower surface, and serves as a light source that illuminates the area around the cooking surface of the top plate 26.

Here, since the front illumination cover 22 of the illumination device 13 is made of a translucent material such as milky white acrylic, the light emitted from the fluorescent lamp 14 is not only emitted from the lower opening as shown in FIG. Since the light is emitted even if it passes through the illumination cover 22, the area around the top plate 26 is not only the range α illuminated by the bottom opening, but also the front edge of the top plate 26 due to the transmitted light 28 from the illumination cover 22. It is possible to brightly illuminate the area in front of the area (range a').

Next, the lighting device 13 using the reflective photoelectric sensor of this embodiment
The circuit configuration will be explained with reference to FIG. The floodlight 17 is supplied with a power supply circuit 21a in the sensor control unit 21,
An oscillator (not shown) within the projector 17 causes the infrared light emitting diode 16 to emit pulsed light at a constant cycle. The optical signal PS1 emitted from the infrared light emitting diode 16 is reflected by an object 29 such as the user's hand, and the reflected wave signal PS
2 is received by the phototransistor 18 in the photoreceiver 19, converted into an electric signal, and then sent to an amplifier (not shown) in the photoreceiver 19.
The main control circuit 21 in the sensor control unit 21 is amplified by
It is output to b. The main control circuit 21b detects and shapes the amplified electrical signal, and further provides a Heratch signal to a drive circuit 21c that turns on/off the supply of AC power 30 to the lighting circuit 16, which is comprised of a relay or the like in the sensor control section 21. Output as .

This launch signal is output every time the reflected wave signal PS1 is incident, and each time, the relay in the drive circuit 2IC is turned on.
The state is reversed to N or OFF, and the fluorescent lamp 14 is blinked. As shown in FIG.
Fluorescent lamp 14 is lit.

Lights go out repeatedly. The main power switch 24 turns on/off the supply of AC power 3o to the power supply circuit 21c, that is, it serves as a switch for switching the sensor function ○N10FF. For example, the circuit configuration is such that the sensor function does not operate and therefore the fluorescent lamp 14 cannot be turned on.

As described above, according to the lighting device 13 of the embodiment of the present invention, by bringing the light emitting/receiving section 20 of the reflective photoelectric sensor to the front of the lighting device 13, as shown in FIG. It is my theory that the sensor will not malfunction due to receiving the incident light a' from the light auxiliary window 32 provided on the rear wall between the doors 27;
6. Since a translucent milky white material is used to brightly illuminate the surrounding area to the front, the front side is naturally narrower due to the light from the fluorescent lamp 14, but if you hold the light emitting/receiving part 2Q in front In this case, the shadow of the light emitting/receiving section 2o will appear on the illumination cover 22, and the appearance will be extremely reduced. 14 is attenuated and a dark area is formed on the front surface of the illumination cover 22, the shadow of the light emitting/receiving section 20 is prevented from appearing on the front surface of the illumination cover 22. It also ensures an aesthetically pleasing appearance. Furthermore, as shown in FIG. 1 or 2, by providing the main power switch 24 on the bottom surface of the illumination device 13 on the rear extension of the light emitting/receiving section 2o mounting position, it is possible to turn on the fluorescent lamp 14 easily. Main power switch 24ON
- A series of lighting operations, such as waving a hand in front of the light emitting/receiving section 2o of the sensor, can be performed quickly and smoothly.

In this embodiment, the light emitting/receiving section 20 and the main power switch 24 are arranged near the right end of the lighting device 13, but the same effect can be obtained even if both are arranged near the left end. Needless to say, it has. Furthermore, the main power switch 24 is provided on the bottom of the illumination device 13 on the rear extension line of the light emitter/receiver 2o;
If it is close to 0, the above effect can be obtained even if it is provided at a position adjacent to the light emitting/receiving section 20 on the front surface of the illumination cover 22.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the light emitting/receiving part of the reflective photoelectric sensor is arranged at the front end of the lighting device main body. This prevents operational inconveniences, such as malfunctions caused by ambient light coming in through the auxiliary window, or malfunctions caused by the light signals emitted by the device itself being reflected by the top plate or cooking utensils placed on the top plate. This improves the reliability of the operation of the device, and also prevents the appearance of a shadow on the front surface of the illumination where the light projecting/receiving section is made of a transparent material, thereby significantly reducing the aesthetic appearance.

Furthermore, by arranging the main power switch that turns on/off the sensor function of the device near the light emitting/receiving section, it is possible to turn on the main power switch when the fluorescent lamp is turned on and place the hand in front of the light emitting/receiving section. It is possible to perform a series of operations such as holding the device up smoothly, and it is possible to improve the operability.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of a lighting device according to an embodiment of the present invention, and FIG.
The figure is an enlarged view of the main parts around the light-receiving part, Figure 3 is a front view of the kitchen equipment in which the same device is installed, Figure 4 is a block diagram of the same device, and Figure 5 is A-A' in Figure 3. 6 is a front view of a kitchen device in which a conventional lighting device is installed, FIG. 7 is an external perspective view of the lighting device, and FIG. 8 is a BB' sectional view in FIG. 6. 13... Illumination device, 14... Fluorescent lamp,
15...Lighting circuit, 17...Light emitter,
19... Light receiver, 20... Light emitting/receiving section of reflective photoelectric sensor, 21... Sensor control section, 2
1a...Power supply circuit, 21b...Main control circuit, 21c...Drive circuit, 22...
Lighting cover made of transparent material, 24... Main power switch, 26... Cabinet, 26...
・Top plate, 27...cabinet body.

Claims (2)

[Claims] (1) A top plate is attached to the cabinet, a cabinet body fixed to the wall above the top plate, and a lighting device disposed on the lower surface of the cabinet body, the front part of which is made of a transparent material, The lighting device consists of a projector that emits an optical signal of a certain level, and a receiver that receives the reflected wave from an object of the optical signal transmitted from the projector, and responds to the incidence of the reflected wave signal by adjusting the light source. It has a switch means for a reflective photoelectric sensor in which the light emitter and the light receiver are integrally arranged side by side to control the point reduction operation; Kitchen equipment installed on the side. (2) A main power switch of the illumination device that turns on and off power supply to the switch means, the main power switch being provided near the light emitting/receiving section of the reflective photoelectric sensor. kitchen equipment.