JP2921088B2 - Kitchen equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a kitchen apparatus provided with a lighting device.

2. Description of the Related Art Conventionally, a lighting device for a kitchen device of this kind is installed in a kitchen device for lighting a sink, and a switch operation is performed by holding a wet hand, a dirty hand, or an object during a cooking operation. It was often done until. However, from the viewpoints of hygiene and electric shock, in recent years, lighting devices using a so-called non-contact type sensor as an operation switch that can turn on and off a light source without directly touching an operation unit have been developed.

Hereinafter, an illumination device with a lighting function using a reflection type photoelectric sensor of a conventional kitchen device will be described with reference to FIGS. 5, 6, and 7. FIG. As shown in FIG. 5, the lighting device 1
Above a top plate 3 attached to a cabinet 2 provided with a water tank and the like, it is fixed to a lower surface of a hanging cabinet 4 fixed to a wall surface,
It serves as a light source for illuminating the periphery of the cooking work surface of the top plate 3. As shown in FIG. 6, a reflection type photoelectric sensor 9 composed of a light projector 6 composed of an infrared light emitting diode 5 and the like and a light receiver 8 composed of a phototransistor 7 and the like is provided on a front portion 1 'of the lighting device 1. The sensor cases are stored in close proximity to each other in the sensor case 10.
Reference numeral 10 denotes a front portion 1 'of the lighting device 1, which is fixed from the inside in close contact with the front portion 1'. A sensor detection window 11 is formed by attaching a colored acrylic plate to the sensor detection window 11. Therefore, the optical signal emitted from the projector 6 is
Projected in front of the lighting device 1 through the sensor detection window 11,
If there is an object such as a hand in front, the reflected light reflected by the object is received by the light receiver 8 again through the detection window 11 and converted into a predetermined electric signal. Then, the main blinking control circuit (not shown) in the lighting device 1 receives the electric signal from the light receiver 8 and blinks a light source such as a fluorescent lamp (not shown) of the lighting device 1. . Here, the projected light from the projector 6 is projected radially forward from the projection surface of the infrared light emitting diode 5, and the projected light is naturally attenuated as going forward, so that the object to be detected is detected by the sensor detection window. The further away from 11, the level of the reflected wave signal received by the light receiver 8 is also attenuated, and becomes lower than the reception level of the light receiver 8 at a certain place. That is, the detection area of the reflection type photoelectric sensor 9 is finite, and as shown in FIG. 7, a light projection area I from the infrared light emitting diode 5 indicated by oblique lines in a dashed line and a phototransistor in a two-dot chain line. 7 light-receiving areas
It is formed from a polymerized part with II. That is, the detection area where the reflected wave reflected by the detection object can enter the phototransistor 7 is an area (area III indicated by a grid) that spreads in a fan shape from the surface of the sensor detection window 11.

However, in the above-described configuration of the conventional lighting device with a lighting function of a kitchen device, when a cockroach or other small animal stays on the surface of the sensor detection window 11, the user does not intend. In addition, there has been a problem that the reflection type photoelectric sensor 9 erroneously detects those small animals and the fluorescent lamp blinks.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a kitchen apparatus provided with a lighting device which does not erroneously detect even a small animal such as a cockroach stays on the sensor detection window 11.

Means for Solving the Problems In order to achieve the above object, the kitchen apparatus of the present invention has a lighting device, a light-emitting device and a light-receiving device of a reflective photoelectric sensor,
Parallel to the front, parallel to the front extension line of the parallel line composed of the respective central axes, the projector and the light receiver are inclined side by side at a fixed angle from the front extension line so that they face each other outward. It is configured to be provided in the.

The lighting device of the kitchen apparatus according to the present invention has the above-described configuration, in which the sensor is kept compact in size, and within a predetermined detection range of the reflection-type photoelectric sensor, a dead zone is provided at a predetermined distance in front. Therefore, the operation is normally detected without any hindrance when the user blinks the fluorescent lamp of the lighting device, but when a small animal such as a cockroach stays on the sensor surface, it is not detected at all because of the dead zone. .

Embodiment An embodiment of the present invention will be described below with reference to FIGS. The same members as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In FIGS. 1 and 2, the lighting device 12 is
On the front surface 12 'of the projector, a light emitting device 14 including an infrared light emitting diode 13 and the like, and a light receiving device 16 including a phototransistor 15 and the like.
Are closely stored in the sensor case 17 side by side to form a reflective photoelectric sensor 18. And sensor case 17
Is fixed in close contact with the inside of a sensor detection window 19 formed by mounting an acrylic plate colored in infrared light transmission color on a portion perforated in a rectangular shape on the front surface 12 'of the lighting device. Here, the infrared light emitting diode 13 and the phototransistor 15 are juxtaposed with an adjacent distance L (L> l) longer than the adjacent distance 1 shown in FIG. Therefore, as shown in FIG. 2, the light emitting area I 'of the optical signal from the infrared light emitting diode
The light-receiving area II 'of the phototransistor 15 shown in the dotted line.
Region polymerization zone III ', in order than the front of the sensor detection window 19 is formed from the front with a predetermined distance D _1, shown in a non polymerization zone (lattice constant a certain range in front of the sensor detection window 19 of the IV) exists. The area IV is a dead area of the light receiving area of the phototransistor 15 even if there is an object to be detected, and thus becomes a dead zone area of the sensor 18. Therefore,
Even small animals such as cockroaches were present within a predetermined distance D ₁ from the front of the sensor detection window 19, the reflection-type photoelectric sensor 18
Does not detect them.

Next, another embodiment of the present invention will be described with reference to FIGS. The illumination device 20 includes an infrared light emitting diode 21
A light emitter 22 composed of a phototransistor 23 and the like and a light receiver 24 composed of a phototransistor 23 and the like approach to each other and are stored side by side in a sensor case 25 to form a reflective photoelectric sensor 26. The sensor case 25 is fixed in close contact with the inside of the sensor detection window 27 as in the above-described embodiment. Here, the central axis 22a of the parallel extension in which the respective central axes 22a and 24a of the light emitter 22 and the light receiver 24 when they are in the parallel state are extended forward from the sensor detection window 27.
And 24a, are stored by being inclined outward at predetermined angles θ ₂₂ and θ ₂₄ . Therefore, also in this embodiment, in FIG. 4, a light projecting region I ″ of the optical signal from the infrared light emitting diode 21 indicated by a hatched portion in a one-dot chain line and a light receiving region of the phototransistor 23 indicated by a two-dot chain line. region II "and the polymerization zone III" is because it is formed from the front with a predetermined distance D ₂ than the sensor detection window 27 front, not overlapping area indicated by lattice until the sensor detection window 27 forward D ₂ IV ', that is, there is a dead zone region of the reflection type photoelectric sensor 26 that does not detect small animals such as cockroaches.In this case, the dead zone region is almost the same as that of the above-described embodiment as compared with the above-described embodiment. , The adjacent distance L ′ between the projector 22 and the receiver 24
Can be set to satisfy L> L ′ (≒ l), so that the sensor itself can be made more compact than the above-described embodiment.

Advantageous Effects of the Invention As is clear from the above description of the embodiment, the present invention has no influence on the normal blinking operation by providing the dead zone area of a fixed distance in front of the sensor of the lighting device, When a small animal such as the animal stays on the sensor surface, a kitchen apparatus with a lighting device can be realized which does not detect the small animal and has a reliable and reliable operation performance without erroneous detection. In addition, the illuminating device arranges the transmitter and the receiver of the sensor side by side, and arranges these central axes at a certain angle outward from each other with respect to the extension line extending forward, so that the dead zone area is the same as the conventional one. In providing the light emitting device, the light emitting device and the light receiving device can be arranged close to each other, and the light emitting device and the light receiving device are provided with optical components such as a lens, a light emitting area of the light emitting device, and a light receiving device of the light receiving device. There is no need to attach a mask component or the like that partially shields the area, and a compact and inexpensive sensor configuration can be realized.

[Brief description of the drawings]

FIG. 1 is an enlarged plan sectional view of a main part of a lighting device of a kitchen apparatus according to an embodiment of the present invention, FIG. 2 is a plan view showing a sensor detection range of the lighting device, and FIG. FIG. 4 is an enlarged plan sectional view showing a main part of a lighting device of the kitchen apparatus of the example, FIG. 4 is a plan view showing a sensor detection range of the lighting apparatus, FIG. 5 is a front view of the kitchen apparatus with the lighting apparatus installed, FIG. FIG. 7 is an enlarged plan sectional view of a main part of a lighting device of a conventional kitchen device, and FIG. 7 is a plan view showing a sensor detection range of the lighting device. 12,20… Illumination device, 14,22… Emitter, 16,24 …… Receiver, 18,26 …… Reflection type photoelectric sensor, III ′, III ″… Sensor detection range (detection range), IV, IV ': sensor dead zone (dead zone), 22a: central axis of projector, 24a: central axis of receiver, θ ₂₂ : inclination angle of projector, θ ₂₄ : inclination angle of receiver.

Continuation of the front page (56) References JP-A-63-271806 (JP, A) JP-A-60-190907 (JP, A) JP-A-52-84473 (JP, A) JP-A-61-99229 (JP) JP-A-63-198221 (JP, A) JP-A-3-58837 (JP, U) JP-A-51-49867 (JP, U) JP-A-60-155144 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) H01H 35/00 H03K 17/78 G01S 17 / 02,17 / 88 H05B 37/02 F21V 33/00 A47B 77/04

Claims (1)

(57) [Claims] In a kitchen apparatus provided with a lighting device, the lighting device includes a light emitter for transmitting an optical signal, and a light receiver for receiving a reflected wave signal of the optical signal transmitted from the light emitter from an object. A reflection type photoelectric sensor that blinks the light source of the lighting device in response to the reception of the reflected wave signal, and the light emitter and the light receiver of the reflection type photoelectric sensor are respectively extended with respect to a forward extension of a central axis thereof. By juxtaposing them at a constant angle from the front extension line so as to face each other outward, the detection range of the optical signal formed by the reflection type photoelectric sensor is shifted forward by a certain distance from the front surface of the reflection type photoelectric sensor. Kitchen equipment with a dead zone for optical signals.