JP2006092900A - Bar light source device and food showcase using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively illuminate the display rack of a food showcase by a bar light source device which can be provided at low cost, using few LED lamps. <P>SOLUTION: Three holes for lighting 2 are arranged at end positions distant by 15 cm from both end parts of a bar case 1 having a length of 90 cm, and at a middle part thereof, and LED lamps are arranged at the respective holes, and a cylindrical lens 7 is arranged at a front part of each LED lamp 5. As a result, the LED lamps arranged at each 30 cm illuminates the display rack 10, at a lighted position in a continued belt shape in the longitudinal direction, and generation of illumination loss in a short side direction is prevented. Uniform illumination of about one meter becomes possible by three LED lamps 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bar light source device using an LED lamp as a light source and a showcase using the same.

  For example, as a bar light source device using LED lamps, a large number of LED lamps are arranged in series at a small pitch in the longitudinal direction of the substrate and mounted on a transparent cylindrical body. For example, for a food display such as a frozen showcase or a refrigerated showcase. It is known that it can be used for long-life lighting with a small cooling load by installing it in a showcase.

JP 2002-147945 A

  In this case, it is possible to form a bar light source device that takes advantage of the LED lamp in place of the conventional fluorescent lamp, and to change the color temperature of the LED lamp to be used, for example, to freshen the product color of meat, fresh fish, etc. It can be improved. However, since the LED lamp has directivity, the illumination light of the adjacent LED lamps overlaps at the illumination position due to the directivity, so that the illumination can be made as uniform as possible in the longitudinal direction. It is necessary to arrange a large number of LED lamps close to each other in the longitudinal direction at a small pitch of, for example, a few centimeters, which increases the cost of the LED lamps and tends to make the bar light source device expensive. In addition, if the number of LED lamps having a wide directivity is reduced, the illumination light is supplied also in the short direction, resulting in a problem that the illumination area in the short direction becomes large and illumination loss occurs. .

  SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and the problem to be solved is to enable continuous strip-like illumination in the longitudinal direction at the illumination position while reducing the number of LED lamps as much as possible. It is another object of the present invention to provide a bar light source device capable of preventing the occurrence of an illumination loss that occurs in the short direction and ensuring a necessary and sufficient illumination area as inexpensively as possible. To provide a showcase that can provide effective lighting.

  In accordance with the above-described problems, the present invention arranges LED lamps at a large pitch of about several tens of centimeters, such as 20 cm and 30 cm, and arranges a lens for bending and expanding the illumination light in the longitudinal direction in each LED lamp. The use of a lamp and a lens as a pair makes it possible to prevent a continuous strip-shaped illumination in the longitudinal direction at the illumination position and the occurrence of illumination loss in the lateral direction. According to the invention, the LED lamps are scattered in the longitudinal direction at a predetermined pitch and the light source light of each LED lamp is refracted and expanded in the longitudinal direction by disposing a lens in front of each LED lamp. The bar light source device is characterized in that the illumination light at the illumination position is continuously arranged in the longitudinal direction.

  In addition to the above, the invention according to claim 2 is a bar light source device of a preferred form for supplying illumination light to illumination positions separated by several tens of centimeters, such as a food showcase or a desk stand. The bar light source device according to claim 1, wherein the pitch of the LED lamps is 3 to 5 pieces / m.

  In addition to the above, the invention described in claim 3 is a lens arranged in front of the LED lamp in the longitudinal direction so that a lens used as a pair with the LED lamp has a preferable form. The bar light source device according to claim 1, wherein the bar light source device is an aspherical lens or a cylindrical lens arranged so as to exert an action.

  The invention described in claim 4 provides a showcase for food, for example, which takes advantage of the LED lamp by using the bar light source device described above. The bar light source device described above is installed in the upper part on the inside, and the LED lamp illumination position is used as a product display shelf to provide a showcase using the bar light source device.

  Since the present invention is configured as described above, according to the first aspect of the present invention, the LED lamps are arranged at a large pitch of about several tens of centimeters, such as 20 cm and 30 cm, and the illumination light is transmitted to each LED lamp in the longitudinal direction. By arranging a lens that bends and expands on the lens and using the LED lamp and the lens as a pair, it is possible to illuminate a continuous strip in the longitudinal direction at the illumination position while reducing the number of LED lamps as much as possible. In addition, it is possible to provide a bar light source device that can prevent the occurrence of an illumination loss that occurs in the short direction and secure a necessary and sufficient illumination area as inexpensively as possible.

  In addition to the above, the invention described in claim 2 can be a bar light source device of a preferred form for supplying illumination light to illumination positions separated by several tens of centimeters, such as a food showcase or a desk stand. .

  In the invention according to claim 3, in addition to the above, the lens used as a pair with the LED lamp can be in a preferred form.

  The invention according to claim 4 can provide a showcase that takes advantage of the LED lamp by using the bar light source device.

  Hereinafter, the present invention will be described in more detail. A is a bar light source device, and the bar light source device A has LED lamps 5 arranged at a predetermined pitch in the longitudinal direction and a lens in front of each LED lamp 5. 7 is arranged so that the light source light of each LED lamp 5 is refracted and enlarged in the longitudinal direction, and the illumination light at the illumination positions by the scattered LED lamps 5 is continuous in the longitudinal direction.

  In this example, the bar light source device A is formed by, for example, irradiating an irradiation hole 2 at a predetermined position in the longitudinal direction of the bar case 1 in which a metal plate is bent to form a hollow cross section and closed at both ends. The illumination light of the LED lamp 5 is irradiated from the holes 2, and the LED lamps 5 are arranged in a scattered manner in the longitudinal direction of the bar case 1.

  At this time, the bar case 1 is supplied with illumination light from the irradiation hole 2 by, for example, setting the length to about 1 m, and providing 3 to 5 irradiation holes 2 per 1 m in length on the bottom wall. The pitch of 5 LED lamps is 3 to 5 / m. In this example, the bar case 1 has a length of 90 cm and a vertical and horizontal length of a rectangular cross section of several cm or less, for example, 2 to 3 cm. A total of three irradiation holes 2 are scattered and arranged at two positions at the end position, for example, 15 cm away from both ends in the longitudinal direction of the bar case 1 and at one center position at a distance of about 30 cm from the end position. The pitch of the five LED lamps is about 30 cm.

  The LED lamp 5 is installed toward the irradiation hole 2 through a mounting base 6 fixed to the top wall according to the position of the irradiation hole 2 of the bar case 1, and in this example, the LED lamp 5 is In the present example, an illumination having a wide irradiation angle as much as possible is used to facilitate the enlargement of bending in the longitudinal direction by the lens 7 and to have illumination with a certain width in the lateral direction. The LED lamp 5 has a relatively large irradiation angle of about 140 degrees, for example.

  The lens 7 arranged in front of the LED lamp 5 is an aspherical lens or a cylindrical lens arranged so as to exhibit the lens action in the longitudinal direction. In this example, the irradiation angle of the LED lamp 5 is as follows. By making the lens relatively large, the lens action is unnecessary in the short direction, and a cylindrical lens is used to exert the lens action in the longitudinal direction. The cylindrical lens exhibits this lens action. By arranging the curved surface perpendicular to the longitudinal direction of the bar case 1, the lens 7 exerts a refractive expansion action with respect to the longitudinal direction. The curved surface is projected from the irradiation hole 2 so as to protrude from 2 and the periphery is placed and fixed on the bottom wall.

  At this time, the cylindrical lens 7 may be selected and used with a magnification that matches the irradiation angle of the LED lamp 5 so that the illumination light continuously continues in the longitudinal direction at the illumination position. When the LED lamp 5 is used, the enlargement magnification may be about 2 to 3 times in accordance with the LED lamp 5. Further, the bending expansion of the illumination light by the cylindrical lens 7 ensures the uniformity of luminance in the longitudinal direction by partially overlapping the illumination light of the adjacent LED lamps 5 at the illumination position, for example, as shown in FIGS. It is preferable that the illumination light is not supplied between the ends of the illumination light regions of the LED lamps 5 or the luminance is partially reduced depending on the magnification of the lens 7. It is good to do.

  The bar light source device A formed in this way is installed in a showcase (not shown), for example, a food showcase, and is used so that the LED lamp 5 illumination position is the product display shelf 10. When the showcase 1 is large, a large number of the bar light source devices A can be arranged in series so as to supply illumination light in the entire width direction or depth direction, and for example, arranged in series on the inner periphery of the showcase. It is also possible to use the product display shelf 10 so as to illuminate it from four rounds.

  In the figure, 3 is a heat insulating material installed in the bar case 1, 4 is a bar case 1, especially the above heat insulation so as to eliminate the cooling load of the frozen or refrigerated food showcase by dissipating the slight heat generated by the LED lamp 5. A heat conductor stretched on the inner surface of the material 3, for example, a heat sink made of aluminum, 8 indicates a lead wire of the bar light source device A, and 9 indicates a hook for installing a showcase of the bar light source device A.

  Although the bar light source device configured as described above is a long one of 90 cm, the three LED lamps arranged at a pitch of 30 cm on the bar light source device are positioned below the bar light source device with respect to an illumination position separated by several tens of centimeters. In this way, a series of continuous illumination lights can be supplied to enable strip-shaped illumination, and it is possible to prevent the occurrence of illumination loss in the short direction and to secure a necessary and sufficient illumination area. The use of an LED lamp can make it as inexpensive as possible.

  For example, when used in food showcases, if the LED lamp has a large irradiation angle, even if the LED lamp is set to the above 3-5 lamps / m, illumination in the short direction is generally performed. Although it is possible to illuminate the preferred overall product, especially food, without the need for a lens effect of bending expansion in the direction, this bar light source device does not prevent some bending expansion in the short direction. In this case, it is possible to use an aspherical lens in place of the cylindrical lens in order to be able to mainly perform bending expansion in the longitudinal direction and secondary bending expansion in the short direction. . In addition, the bar light source device, the LED, and the like, including processing the bar case by processing the extruded shape of aluminum or resin, using a plurality of lenses in front of the LED lamp, etc. Specific structures, shapes, materials, numbers, dimensions, relations, additions to these, etc. of the lamp, lens, aspherical lens used as necessary, cylindrical lens, showcase, product display shelf, etc. As long as it is not contrary to the gist of the invention, various forms can be adopted.

It is a perspective view by the side of a bar light source device light source surface. It is the elements on larger scale of FIG. FIG. 3 is a longitudinal sectional view taken along line AA in FIG. 2. It is the BB line longitudinal cross-sectional view of FIG. It is model sectional drawing which shows the irradiation state of a bar light source device. It is a model top view which shows the irradiation state of an illumination position.

Explanation of symbols

A Bar light source device 1 Bar case 2 Irradiation hole 3 Heat insulating material 4 Heat sink 5 LED lamp 6 Mounting base 7 Lens 8 Lead wire 9 Hook 10 Display shelf

Claims (4)

  The LED lamps are scattered at a predetermined pitch in the longitudinal direction, and a lens is disposed in front of each LED lamp, whereby the light source light of each LED lamp is refracted and expanded in the longitudinal direction, and the illumination position by the scattered LED lamps is adjusted. A bar light source device characterized in that illumination light is continuously arranged in a longitudinal direction.   The bar light source device according to claim 1, wherein a pitch of the LED lamps is 3 to 5 / m.   3. The bar light source device according to claim 1, wherein the lens disposed in front of the LED lamp is an aspherical lens or a cylindrical lens disposed so as to exhibit a lens action in a longitudinal direction.   A showcase using a bar light source device, wherein the bar light source device according to any one of claims 1 to 3 is installed on an inner upper part, and the LED lamp illumination position is used as a commodity display shelf.

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