JP2590621Y2 - Kitchen unit with lighting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen unit with a lighting device provided with a lighting device using an optical fiber.

[0002]

2. Description of the Related Art Conventionally, indoor lighting such as an incandescent lamp or a fluorescent lamp set in a kitchen is generally used as it is for lighting a sink. Such indoor lighting is usually performed by disposing an incandescent lamp or the like at an upper position away from the sink.

[0003]

However, with such lighting, there is a problem that sufficient light cannot be obtained in the vicinity of a faucet washing place or in the vicinity of a cooking table, resulting in darkening of hands. In order to solve such a problem, if an illumination device is provided near the periphery of water, measures for preventing electric leakage and the like are required, and the configuration for preventing electric leakage is complicated.

[0004] In addition, when lighting is performed with high brightness using an incandescent lamp or the like in the vicinity of a cooking table, the heat of the incandescent lamp increases the temperature of the fresh food such as fish being cooked, and the fresh food is discolored. There was a problem that it became easier.

[0005] The present invention has been made in view of the above-mentioned problems, and illuminates a wide range of lighting near a washing place or a cooking table.
It is an object of the present invention to provide a kitchen unit with a lighting device, which can easily take measures against electric leakage and the like, and does not cause discoloration of fresh food or the like.

[0006]

According to a first aspect of the present invention, there is provided a washing tank or a cooking table.
In addition, a lighting device is installed near the washing tank or the cooking table.
A kitchen unit with a girder lighting device, wherein the lighting device
Is a light source, a core for transmitting light from the light source,
And a cladding for covering the core, and light is emitted from an end of the core.
Optical fiber as an optical transmission line having an emission end for emission
When provided with the exit end of the optical fiber, the cleaning tank or
Install it to the worktop and propagate it through the core.
At least a portion of the incident light,
Direction in which the angle of incidence of light on the boundary surface becomes smaller than the critical angle
A reflecting surface that reflects light in the axial direction of the optical fiber.
Formed on a surface having an angle of about 30 degrees .

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

In the kitchen unit with the lighting device according to the first aspect , light from the light source propagates through the core of the optical fiber toward the emission end, and at least a part of the light is reflected on the reflection surface provided at the emission end. At the interface from the core to the cladding. The light reaching this interface is incident on the interface at an angle of incidence smaller than the critical angle due to the direction of reflection of the light by the reflecting surface, so that the light is refracted at the interface and passes through the cladding, The light is emitted toward the washing tank or the cooking table. For this reason, light is also emitted from the peripheral surface before the end surface on the emission side from the optical fiber, and it is possible to illuminate the washing tank or the cooking table in a wide range.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

FIG. 1 is a perspective view showing a main part of a sink unit 1 as one embodiment of the present invention, and FIG. 2 is a perspective view showing an appearance of the sink unit 1. As shown in FIG.

As shown in FIG. 2, the sink unit 1 comprises:
A plurality of bases 2 provided with a faucet, a cooking table, and the like on an upper part are combined, and a storage shelf 3 installed above the bases 2 is provided.

The base 2 comprises a range table 10, a main cooking table 20, a sub cooking table 30, a washing place table 40 with a washing tub, and the like, each of which is provided with a lighting device.

These lighting devices include a line light for the main worktop 20, a surface light for the sub worktop 30,
0 and the washing stand 40 with a washing tank are spot lighting.

That is, as shown in FIGS. 5 and 6, the illumination device of the main cooking table 20 has a slit 23 formed in the front wall surface 21, and a plurality of optical fibers are focused on the slit 23. The ends of the body 25 are fitted respectively, and emit light in a line shape. The irradiation direction of this light is the direction of the main cooking surface 28. The configuration of the optical fiber portion of such linear illumination will be described later in detail.

The illuminating device of the sub-cooking table 30 has a frame 31 provided on the front wall surface, and a groove 32 is formed in the frame 31 in the longitudinal direction thereof. Fiber converging bodies 35 are fitted in directions that make the longitudinal direction of the converging body 35 coincide with the longitudinal direction of the groove 32. The converging body 35 is worked, and is irradiated with light from the side surface of the converging body 35 in a planar manner. The configuration of the optical fiber portion of such a planar illumination will be described later in detail.

The lighting device of the above-mentioned range table 10
A convergent body 15 of an optical fiber is installed on the lower surface of the optical fiber, and light is emitted downward from an end of the convergent body 15 in the form of a spot. In the lighting device of the washing stand with a washing tub 40, a converging body 45 of an optical fiber is installed at the upper end of the outlet of the faucet 41, and a spot is directed downward from the end of the converging body 45. It is illuminated like a light. The configuration of the optical fiber portion of such spot-shaped illumination will be described later in detail.

The above-mentioned converging members 15 and 2 of each optical fiber
5, 35, and 45 are respectively turned from the front surface and the upper surface of the base 2 to the rear surface side, and thereafter, are combined into one bundle, and the combined optical fiber bundle is transmitted to the light source device 51 that emits light. It is connected.

As shown in FIG. 3, a light source device 51 includes a lamp 54 that emits light when it receives power from a ballast 53.
A parabolic reflecting mirror 55 for regulating the direction of light emission from the lamp 54; a lens 56 for restricting the light emitted from the lamp 54; and an end of the bundle of optical fibers in the traveling direction of the light passing through the lens 56. A base 5 for fixing (the end on the incident end side)
7 is provided. The light radiated from the lamp 54 is converged through a lens 56, and thereafter, is input to an incident end of an optical fiber fixed to a base 57. The optical fibers constituting the converging members 15, 25, 35, and 45 are formed using methacrylic resin as a material.

A. Details of Line-Shaped Illumination FIG. 4 is a front view, an end view on the incident end side, and an end view on the emission end side of the converging body 25 of the optical fiber for realizing the linear illumination. As shown in FIG.
Is a resin in which a plurality of optical fibers are fixed with resin so that the end face becomes circular on the incident end side and each single line is linearly arranged in two rows on the output end side.

The converging body 2 of the optical fiber thus formed
The emission end of No. 5 is fitted into the slit 23 of the front wall 21 as described above. FIG. 5 is a cross-sectional view of the front wall 21 in which the emission end of the converging body 25 is fitted into the slit 23, and FIG. 6 is a longitudinal cross-sectional view of the front wall 21. As shown in these figures, the exit end of the converging body 25 is
Is fixed with a stopper 25 or an adhesive in a state where it is inserted to a position where it does not protrude from the surface. Also, as shown in FIG. 6, the optical fibers of the converging body 25 are fitted into the slits 23 at a predetermined angle θ downward with respect to the thickness direction of the front wall 21, and as described above, Light is emitted in a direction toward the main cooking surface 28.

Note that the output end of the converging body 25 is, as described above, actually a single line of the optical fiber formed by two straight lines.
Although they are arranged in a row, FIG. 1 shows a state where they are arranged in a straight line in a line for convenience of illustration. By the way, since the single fiber of the optical fiber has a thickness of several hundred μm, the slit 23 is clearly shown in the figure, but in fact, it is not conspicuous at all, as if from the inside of the front wall portion. It just gives the impression that light leaks out.

B. Details of Spot-Shaped Illumination FIG. 7 is a front view, an end view on an incident end side, and an end view on an emission end side of optical fiber converging bodies 15 and 45 for realizing spot-like illumination. As shown in the figure, the optical fiber converging members 15 and 45 are obtained by fixing a plurality of optical fibers in a cylindrical shape with resin.

As described above, one converging body 15 of the optical fiber thus formed is disposed on the lower surface of the storage shelf 3, and the emission end thereof is installed so as to face the range table 10. . Also, the converging body 4 of the other optical fiber
5 is arranged along the main body upper part of the faucet 41,
The exit end is installed so as to face downward from the upper part of the water outlet.

It should be noted that such an optical fiber converging body 15,
The light emitted from the light source 45 normally irradiates one point in a spot shape. However, in order to irradiate the range table 10 in a wider range, in fact, the single line of each optical fiber constituting the converging bodies 15 and 45 is The following processing is performed on the emission end face.

That is, as shown in FIG. 8, the output end of a single line of each optical fiber constituting the converging body 25 is clockwise by 30 degrees with respect to the length direction of the optical fiber (x direction in the figure). Cut at an angle. This cut surface is in a relatively rough state that does not lead to optical polishing. The light that has traveled inside the core C1 to the end of the optical fiber is reflected by the cut surface, and the angle of incidence from the core C1 to the boundary between the core C1 and the clad C2 becomes less than the critical angle, and leaks out of the core C1. When the light traveling inside the core C1 of the optical fiber is viewed macroscopically, it is assumed that this light is one light that travels straight in the length direction of the optical fiber as shown by a two-dot chain line in FIG. And this light is transmitted through the core C in a direction at an angle of 60 degrees with respect to the length direction.
Leaks from one. This means that the light emitted from the optical fiber cut at an angle of 30 degrees is 6 degrees with respect to the length direction.
It is shown that it becomes the strongest in the direction of the angle of 0 degrees. That is, the optical fiber cut at an angle of 30 degrees is centered on a direction at an angle of 60 degrees with respect to the length direction,
Light is emitted in a direction extending from that direction.

FIG. 9 is a graph showing the results of experimentally measuring the brightness of light emitted from the cut surface at an angle of 30 degrees. In the graph shown in the figure, the length direction of the optical fiber is set to an angle of 0 degree, the clockwise direction is set to a positive angle direction (the cut surface is at an angle of 30 degrees), and the direction showing the strongest brightness is 100%. It is drawn as brightness. As can be seen from the figure, the brightness of the outgoing light is the strongest of 100 [%] in the direction of 60 degrees, and is approximately 15 to 9%.
It shows a brightness of 50% or more over 0 degrees. That is, the convergent bodies 15 and 45 of the optical fiber having the cut surface at the angle of 30 degrees irradiate light in a direction spread from 15 degrees to 90 degrees with respect to the length direction of the optical fiber. Is also proved. Therefore, the light emitted from the converging bodies 15 and 45 of such optical fibers usually has a wide range from one spot-like point, and irradiates the range table 10 and the washing place table 40 with a washing tank in a wide range.

By the way, the optical fiber cut at an angle of 30 degrees may be configured to be used also for the converging body 25 of the optical fiber for realizing the above-mentioned linear illumination. With this configuration, the linear irradiation range can be a wider range, and the main cooking surface 28 can be irradiated in a wider range. In addition, the cut surface of the end face on the emission side of the optical fiber has an angle of 60 degrees with respect to the length direction of the optical fiber, but is not limited to this, and the light reflected by the cut surface is , Core C1
Any angle may be used as long as the angle of incidence is such that light enters the cladding C2 at an angle of incidence equal to or less than the critical angle.

C. Details of Planar Illumination FIG. 10 shows a convergent body 3 of an optical fiber for realizing planar illumination.
5 is a front view, an end view on the incident end side, and an end view on the emission end side. FIG. 11 is a sectional view taken along line AA in FIG.

As shown in FIG. 10, the converging body 35 of the optical fibers is composed of a plurality of optical fibers arranged in a line in a straight line in a predetermined range on the exit end side and a circular end face on the entrance end side. It is fixed with resin so as to form a flat surface. Moreover, each optical fiber forming the converging body 35 has
A scratch 65 is formed on one side of a portion forming the plane. As shown in FIG. 10 and FIG.
It is formed for each optical fiber, extends in the length direction of the optical fiber, and has a depth reaching the core C1. Further, a reflection resin is applied to an end face on the emission side of the converging body 35, so that light is not emitted from the end face on the emission side.

When light is incident on the incident end face of the converging body 35 of the optical fiber, this light travels in the core C1 in the direction of the incident end, and reaches the plane portion. In this plane portion, the core C
The light traveling inside 1 is irregularly reflected on the surface of the flaw 65 formed on the plane portion, and reaches the boundary portion between the core C1 and the clad C2 on the flawless surface side. At this time, when the angle of incidence of the light on the boundary portion becomes smaller than the critical angle, the light leaks out from the boundary portion to the outside (the side with no scratch) as shown by the dashed line in FIG. In addition, as described above, since the reflection surface is coated on the end surface on the emission side, the light reaching the end surface without leaking from the flat surface portion is
The light is reflected by the reflective resin and returns to the plane portion side, and light leaks from the plane portion. As a result, the converging body 35 of the optical fiber having the above-described configuration is irradiated with light from the entire surface of the flat portion where the flaw is not formed.

As described above, the converging body 35 of the optical fiber having such a configuration is fitted into the groove 32 of the framework 31 provided on the left and right sides of the front wall portion 21, respectively. The flat portion of the converging body 35 is fitted into the groove 32. At this time, naturally, the light emission direction is
2 outward.

Next, the characteristics of the optical fibers constituting the converging members 15, 25, 35, and 45 as the optical transmission lines described above will be described. As described above, each optical fiber is formed of methacrylic resin, and the methacrylic resin absorbs a considerable amount of light in the infrared and ultraviolet regions. In particular, for ultraviolet rays, 250
[Nm] and light in the wavelength region of 360 [nm] are well absorbed. As for infrared rays, while the temperature of the atmosphere of the light emitted from the light source device 51 is almost 60 degrees,
Since the temperature of the atmosphere on the exit end side of the optical fiber is approximately 37 degrees Celsius, it is experimentally proved that light in a considerable infrared region is absorbed.

In the sink unit 1 as the first embodiment of the present invention configured as described above, the converging members 15 and 25 of the optical fibers for realizing the linear illumination, the spot illumination and the planar illumination respectively. , 35, and 45 irradiate light to each base 2. Therefore, range unit 1
0, the portion to be brightened, such as the main cooking surface 28, the sub cooking surface 38, the faucet 41, etc., can be efficiently illuminated.
In addition, by installing the light source device 51 for the optical fiber at a position away from the light emitting end of the optical fiber, measures against electric leakage and the like can be simplified. Further, converging bodies 15, 25, 35, 45
Is formed using methacrylic resin as a material, as described above, the temperature of the atmosphere on the emission end side is approximately 37 degrees Celsius or less. Therefore,
At the time of cooking, the fresh food placed on the main cooking surface 28 or the like does not receive heat higher than 37 degrees Celsius, so that discoloration hardly occurs.

In the sink unit 1 of this embodiment,
Since the optical fibers of the converging bodies 15, 25, 35, and 45 are formed of methacrylic resin, light in the ultraviolet region is well absorbed during light transmission as described above. For this reason, the amount of ultraviolet light received for fresh food can be reduced, and as a result, discoloration can be further prevented.

Next, a second embodiment of the present invention will be described. The sink unit according to the second embodiment of the present invention is different from the first embodiment in that the material for forming the optical fibers of the converging bodies 15, 25, 35, and 45 is replaced with methacrylic resin and is made of quartz glass. , Light source device 51, FIG.
As shown in FIG. 2, a heat cut filter 71 for cutting a wavelength in the infrared region is provided between the lamp 54 and the lens 56, and the other configuration is the same.

In the sink unit having such a configuration, the optical fiber itself cannot cut the light in the infrared region, but the light cut filter 71 of the light source device 51 can cut the light in the infrared region. The temperature of the atmosphere on the emission end side of the converging bodies 15, 25, 35, 45 constituting the above is 37 degrees Celsius or less. Therefore, the first
As in the embodiment, fresh food products and the like can be illuminated brightly, and discoloration due to heat does not occur.

In the second embodiment, the heat cut filter 71 may be configured to cut light in the ultraviolet region in addition to light in the infrared region. For food products, the amount of ultraviolet light received can be reduced, and as a result, discoloration can be prevented.

Although several embodiments of the present invention have been described in detail, the present invention is not limited to these embodiments, and may be implemented in various modes without departing from the gist of the present invention. Of course, it can be implemented.

[0047]

As described above, the kitchen unit with the lighting device according to the first aspect of the present invention emits the optical fiber.
By irradiating the end with light near the faucet of the kitchen or toward the worktop, bright lighting can be performed over a wide range in the faucet or the worktop that is apt to be dark.
Further, by providing the emission end from the tip of the optical fiber to the vicinity of the washing tank or the cooking table, and providing the electrical configuration of the light source and the like at a position away from the surroundings of the water such as the washing tank, the configuration for the electric leakage is not particularly taken. , The configuration becomes simple. Further, since the optical fiber is resistant to moisture, the optical fiber is excellent in durability when the lighting device is used in a highly humid cleaning tank or the like. Also,
From around the emission end of the optical fire,
To provide a large area and non-glaring irradiation
Can be.

[0048]

[0049]

[0050]

[0051]

[0052]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a sink unit 1 according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the sink unit 1;

FIG. 3 is a schematic configuration diagram showing a configuration of a light source device 51 together with a ballast 53.

FIG. 4 is a front view, an end view on an incident end side, and an end view on an emission end side of a converging body 25 of an optical fiber for realizing linear illumination.

FIG. 5 is a cross-sectional view showing the vicinity of a front wall portion 21 of the cooking table 20 in which an emission end of the converging body 25 is fitted into a slit 23.

FIG. 6 is a longitudinal sectional view of the front wall portion 21.

FIG. 7 is a front view, an end view on an incident end side, and an end view on an emission end side of a converging body 15 of an optical fiber for realizing spot-like illumination.

FIG. 8 is an explanatory view showing a single-wire exit end side of each optical fiber constituting the converging body 15;

FIG. 9 is a graph showing the brightness of light emitted from an optical fiber having a cut surface at an angle of 30 degrees with respect to the length direction.

FIG. 10 shows a converging body 3 of an optical fiber for realizing planar illumination.
5 is a front view, an end view on the incident end side, and an end view on the emission end side of FIG.

11 is a sectional view taken along line AA in FIG.

FIG. 12 is a schematic configuration diagram showing a configuration of a light source device 51 according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sink unit 2 ... Base 3 ... Storage shelf 10 ... Range stand 15 ... Converging body 20 ... Main cooking table 21 ... Front wall 23 ... Slit 25 ... Converging body 28 ... Main cooking surface 30 ... Sub cooking table 31 ... Framework 32 ... Groove 35 ... Converging body 38 ... Sub-cooking surface 40 ... Washing stand with washing tank 41 ... Water faucet 45 ... Converging body 51 ... Light source device 53 ... Stabilizer 54 ... Lamp 55 ... Parabolic reflector 56 ... Lens 57 ... Base 65 ... Scratch 71 ... Heat cut filter C1 ... Core C2 ... Clad

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-1-320703 (JP, A) JP-A-2-7003 (JP, A) JP-A-3-138610 (JP, A) JP-A-3-32010 171101 (JP, A) JP-A-3-196403 (JP, A) JP-A-64-32503 (JP, U) JP-A-63-146803 (JP, U) (58) Fields investigated (Int. ⁶ , DB name) A47B 77/00 F21S 1/00 F21V 8/00 G02B 6/00 331

Claims (1)

(57) [Scope of request for utility model registration] 1. A kitchen unit with a lighting device, comprising: a washing tank or a cooking table; and a lighting device provided in the vicinity of the washing tank or the cooking table, wherein the lighting device comprises: a light source; and a light from the light source. a core for transmitting, and a cladding covering the core, and an optical fiber as an optical transmission line having an exit end for emitting light from an end portion of the core, the exit end of the optical fiber, cleaning A reflecting surface that is installed toward a tank or a cooking table, and reflects at least a part of the light that has propagated in the core, in a direction in which an incident angle of light with respect to a boundary surface between the core and the clad is smaller than a critical angle. An optical fiber illuminating device comprising: a surface formed at an angle of about 30 degrees with respect to the axial direction of the optical fiber.