JP2004264407A - Led guide structure and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED guide structure which is easily and inexpensively formed and suited to products produced in a small amount and various types, and to provide its manufacturing method. <P>SOLUTION: In this LED guide structure which reflects light emitted from LEDs 11 disposed on a substrate 10, a cover 20 is provided to mostly cover the face of the substrate 10 with the LEDs 11 placed thereon. The cover 20 has openings 21 formed at parts corresponding to the LEDs 11 by burring and also drawn collar parts 31 formed to the LED side from periphery parts 21a of the openings 21, as reflection parts. The collar parts 31 are of cylindrical type and surround the LEDs 11 with the LEDs 11 roughly as centers. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an LED guide structure provided for the purpose of ensuring the brightness of an LED and a method for manufacturing the same, and more particularly, to an LED guide structure integrally provided on a cover plate and a method for manufacturing the same.
[0002]
[Prior art]
At present, LEDs (light emitting diodes) are generally used as pilot lamps and other indicator lights. In such an LED, in order to make it easier for the user to recognize the lighting state of the LED, it is necessary to secure the brightness, increase the viewing angle, and prevent interference with the light of another adjacent LED. In particular, in recent years, with the increasing use of chip LEDs, securing luminance and increasing the viewing angle have become important issues.
[0003]
As a method of solving such a problem, there is a method of providing an LED guide structure around the LED to reflect light emitted from the LED. As an aspect of such an LED guide structure, for example, as shown in Patent Document 1, there is a structure in which a reflecting portion is integrally formed when a cover plate is manufactured by molding or press molding using a mold. . As described above, if the reflecting portion is integrally formed at the time of manufacturing the cover plate, the LED guide structure can be provided at low cost and easily.
[0004]
[Patent Document 1]
JP 2001-134220 A (FIG. 3)
[0005]
[Problems to be solved by the invention]
However, when the cover plate is a small lot product, if a mold is manufactured and molding or press molding is performed, the cost is rather increased, so that the manufacturing method using the mold is not used. Therefore, the reflecting portion cannot be formed integrally with a mold. Conventionally, in the case of such a small lot cover plate, as shown in FIGS. 6A and 6B, the substrate 10 on which the LED 11 is disposed and the display content of the LED 11 covering this substrate 10 are described. Reflecting members 51 and 52 as separate components are attached to the cover plate 50 as reflecting portions. However, if the structure uses the reflection members 51 and 52 as separate parts, the reflection members 51 and 52 must be newly manufactured or purchased on the market, which also increases the cost.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an LED guide structure which can be formed easily and inexpensively, is suitable for various kinds of products in small quantities, and a method of manufacturing the same.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an LED guide structure for reflecting light emitted from an LED disposed on a substrate, wherein a cover plate is provided so as to substantially cover a surface of the substrate on which the LEDs are disposed, and the cover plate is provided on the cover plate. Is characterized in that an opening is formed in a portion corresponding to the LED by burring processing, and a squeezed flange piece formed on the LED side from a peripheral portion of the opening as a reflecting portion.
[0008]
Further, the present invention is characterized in that the squeezed collar piece has a cylindrical shape or a rectangular shape surrounding the LED substantially at the center of the LED.
[0009]
Further, the present invention is characterized in that the surface of the cover plate is mirror-finished.
[0010]
Further, in the present invention, in a LED guide structure for reflecting light emitted from an LED disposed on a substrate, a cover plate is provided so as to substantially cover a surface of the substrate on which the LED is disposed, and the cover plate corresponds to the LED. It is characterized in that it has an opening in a portion, and an enclosure made of an electric component is arranged around the LED to form a reflecting portion.
[0011]
The present invention also provides a method for manufacturing an LED guide structure for reflecting light emitted from an LED disposed on a substrate, wherein a cover plate is provided so as to substantially cover a surface of the substrate on which the LEDs are disposed, and the cover plate includes An initial opening is provided in a portion corresponding to the LED, and a burring process is performed on the initial opening to form an opening, and a squeezed flange piece is formed by squeezing out from the periphery of the opening toward the LED. The squeezed flange piece is used as a reflecting portion.
[0012]
The present invention is also characterized in that the surface of the cover plate is mirror-finished and then burring is performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a first embodiment will be described. 1 is a front view of a display panel according to the first embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a cross-sectional view of an LED guide structure according to the first embodiment of the present invention, FIG. 4 is a view showing a stage of forming the reflection portion.
The LED guide structure according to the present invention is widely applicable as long as it is a display unit using an LED. Here, a display panel of a receiver of a fire alarm system as shown in FIGS. 1 and 2 is taken as an example. I will explain it. The display panel 1 notifies the user of the use state of each terminal and the contents of an alarm or the like by the light emission of the LED 11 arranged on the substrate 10. Note that the LEDs 11 do not necessarily need to be mounted on the substrate 10, and may be connected to the substrate 10 by, for example, lead wires.
[0014]
A sheet metal panel 20 is provided so as to cover the surface of the substrate 10 on which the LEDs 11 are arranged. The sheet metal panel 20 functions as a cover plate for protecting a circuit on the substrate 10 and indicates what state the light emission of the LED 11 indicates. The sheet metal panel 20 is desirably a metal plate having a mirror-like surface, such as stainless steel, so that the effect as a reflecting portion of the squeezed flange piece 31 described later is enhanced.
An opening 21 is provided in a portion corresponding to the LED 11 of the sheet metal panel 20 so that the LED 11 on the substrate 10 can be visually recognized from the outside. The opening 21 is usually circular, but may be triangular or rectangular depending on the shape and display contents of the LED 11. The opening 21 may be configured to directly expose the LED 11 on the substrate 10, or a transparent or translucent plastic cover or the like may be attached to the opening 21.
[0015]
As shown in FIG. 3, a squeezed flange piece 31 that functions as a reflecting portion that reflects light emitted from the LED 11 is formed on such a sheet metal panel 20. The squeezed collar piece 31 is formed continuously from the peripheral portion 21a of the opening 21 of the sheet metal panel 20, and is formed in a cylindrical shape surrounding the LED 11 as a center.
The light emitted from the LED 11 is reflected by the squeezed flange piece 31 to ensure the brightness and improve the visibility, and also to increase the viewing angle and to emit light emitted from the other LEDs 11 on the substrate 10. Interference can be prevented. Further, since the squeezed collar piece 31 has a cylindrical shape surrounding the periphery with the LED 11 as a center, the light emitted from the LED 11 is reflected in the same manner in four rounds. This is a degree of luminance, and the visibility of the LED 11 is improved.
[0016]
Here, the shape of the squeezed flange piece 31 is cylindrical, but the shape is not particularly limited to this, and it can be freely changed to another shape such as a square shape depending on the display content of the display panel 1 and the like. You can The inclination angle of the squeezed flange piece 31 with respect to the substrate 10 may be substantially perpendicular to the substrate 10 as shown in FIG. 3A depending on the directivity of the LED 11 and the required viewing angle. 3B, the substrate 10 can be freely changed.
[0017]
Such a squeezed collar piece 31 is formed by burring. That is, a burring process is performed on the sheet metal panel 20, and a portion corresponding to the LED 11 is squeezed and deformed toward the LED 11 to form a squeezed flange piece 31, which is used as a reflection portion.
Thereby, even when the sheet metal panel 20 is a small lot product and a mold is not manufactured, the reflecting portion can be integrally provided on the sheet metal panel 20. Accordingly, there is no need to prepare a separate reflecting member, and the manufacturing cost can be reduced. Further, since burring is one of the very common sheet metal processing methods used when forming a screw hole in a thin plate, such processing is easy.
[0018]
Next, a method for manufacturing such an LED guide structure will be described. First, the formed sheet metal panel 20 is set on the die 41 of the burring apparatus 40, and an initial opening 22 is opened in a portion corresponding to the LED 11 of the sheet metal panel 20 with a punch (not shown). Next, the burring punch 43 is lowered. When the burring punch 43 is lowered, the burring punch 43 comes into contact with the initial opening 22 of the sheet metal panel 20 (FIG. 4A). 4B, and is deformed by drawing (FIG. 4B), and finally a cylindrical squeezed flange piece 31 serving as a reflecting portion is formed (FIG. 4C). At the same time, an opening 21 is also formed.
[0019]
Although the general burring process has been described here, other burring methods may be used. The shape and size of the squeezed flange piece 31 are also changed by changing the diameter of the initial opening portion 22 that can be opened by the punch, or by changing the burring mold and adjusting the clearance (clearance) between the burring punch 43 and the die 41. It can be changed freely. Further, before the burring process is performed on the sheet metal panel 20, the surface of the sheet metal panel 20 is mirror-finished, or after the burring process is performed, the inner surface of the squeezed flange piece 31 is mirror-finished. The function of the reflection part 31 as a reflection part becomes more effective.
[0020]
The first embodiment has been described above. In the first embodiment, the squeezed flange piece 31 is formed by subjecting the sheet metal panel 20 to burring, and this is used as a reflecting portion. However, it is possible to provide the reflection section at low cost by other methods. Hereinafter, an LED guide structure according to the second embodiment will be described.
FIG. 5 is a sectional view of the LED guide structure according to the second embodiment of the present invention. Also in the present embodiment, the LEDs 11 are mounted on the substrate 10, and the sheet metal panel 20 is provided so as to cover the surface of the substrate 10 on which the LEDs 11 are arranged, and a portion corresponding to the LED 11 of the sheet metal panel 20. Is provided with an opening 21.
[0021]
In the present embodiment, the enclosure 32 made of an electric component on the substrate 10 is used as a reflection unit. That is, various three-dimensional components such as a capacitor, a heat radiating plate, and a resistor are arranged on the substrate 10, and a circuit design of the substrate 10 is performed so that these components surround the periphery of the LED 11. The enclosure 32 is constituted by the above. The light emitted from the LED 11 is reflected by the enclosure 32 to secure the brightness, improve the visibility, expand the viewing angle, and combine with the light emitted from the other LEDs 11 on the substrate 10. Interference can be prevented. In particular, in recent years, with the frequent use of chip LEDs having a small thickness, light is reflected even by electric components having a relatively small height. Therefore, even when the enclosure 32 formed of electric components is used as a reflecting portion, a sufficient effect is obtained. can get.
[0022]
As described above, by using the enclosure 32 formed of the electric component as the reflection portion, it is not necessary to form the reflection portion on the sheet metal panel 20 or use a reflection member of another component, thereby further reducing the manufacturing cost. Can be reduced.
Here, the enclosure 32 is configured by the electric components on the substrate 10. However, for example, electric components and the like that do not constitute a circuit on the substrate 10, such as waste electric components, are arranged around the LED 11 to form an enclosure. 32 may be configured.
[0023]
The embodiments of the present invention have been described above. In the above embodiment, the display panel of the receiver of the fire alarm system has been described as an example. However, the LED guide structure of the present invention is not limited to this, and can be applied to various products using LEDs.
[0024]
【The invention's effect】
According to the present invention, a cover plate is provided so as to substantially cover a surface of a substrate on which LEDs are arranged, and an opening is formed on the cover plate by burring at a portion corresponding to the LED, and a peripheral edge of the opening is formed. Since the squeezed flange piece formed on the LED side is used as the reflection portion, even if the cover plate is a small lot product and a mold is not manufactured, the reflection portion can be integrally provided on the cover plate. it can. Accordingly, there is no need to prepare a separate reflecting member, and the manufacturing cost can be reduced. Further, since burring is one of the very common sheet metal processing methods used when forming a screw hole in a thin plate, such processing is easy.
[0025]
Further, according to the present invention, since the squeezed collar piece is cylindrical or square surrounding the LED substantially at the center of the LED, the light emitted from the LED is reflected in the same manner in four rounds. Even if the LED is viewed from the direction, the brightness is substantially the same, and the visibility of the LED is improved.
[0026]
Further, according to the present invention, since the surface of the cover plate is mirror-finished, the function of the squeezed flange piece as a reflecting portion becomes more effective.
[0027]
Further, according to the present invention, a cover plate is provided so as to substantially cover the surface of the substrate on which the LEDs are arranged, the cover plate has an opening at a portion corresponding to the LED, and an enclosure made of an electric component is provided around the LED. Since it is arranged to be a reflection part, it is not necessary to provide a reflection part on the cover plate or use a reflection member of another part, and it is possible to further reduce the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a front view of a display panel according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view taken along line AA of FIG.
FIG. 3 is a sectional view of the LED guide structure according to the first embodiment of the present invention.
FIG. 4 is a view showing a stage of forming a reflecting portion according to the first embodiment of the present invention.
FIG. 5 is a sectional view of an LED guide structure according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view of a conventional LED guide structure using a reflection member made of a separate component.
[Explanation of symbols]
1 display panel 10 substrate 11 LED
Reference Signs List 20 sheet metal panel 21 opening 21a peripheral edge 22 initial opening 31 squeezed flange piece 32 enclosure 40 burring device 41 die 42 die hole 43 burring punch 50 cover plate 51, 52 reflective member

Claims (6)

In the LED guide structure that reflects the light emitted by the LED arranged on the substrate,
A cover plate is provided so as to substantially cover the surface of the substrate on which the LEDs are arranged, and an opening is formed on the cover plate by burring at a portion corresponding to the LED, and the LED side from the periphery of the opening. An LED guide structure, characterized in that the squeezed flange piece formed in the above is used as a reflecting portion. 2. The LED guide structure according to claim 1, wherein the squeezed flange piece has a cylindrical shape or a rectangular shape that surrounds the LED around the LED. 3. The LED guide structure according to claim 1, wherein the surface of the cover plate is mirror-finished. In the LED guide structure that reflects the light emitted by the LED arranged on the substrate,
A cover plate is provided so as to substantially cover the surface of the substrate on which the LEDs are arranged, the cover plate has an opening at a portion corresponding to the LEDs, and an enclosure made of an electric component is arranged around the LEDs. An LED guide structure characterized in that the LED guide structure is used as a reflection part. In a method for manufacturing an LED guide structure that reflects light emitted from an LED disposed on a substrate,
A cover plate is provided so as to substantially cover the surface of the substrate on which the LEDs are arranged, and the cover plate has an initial opening in a portion corresponding to the LEDs,
Along with forming an opening by performing burring on the initial opening, forming a squeezed flange piece by squeezing out from the peripheral edge of the opening to the LED side, characterized in that the squeezed flange piece is a reflecting portion. Of manufacturing an LED guide structure. 6. The method according to claim 5, wherein the surface of the cover plate is mirror-finished before burring.

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