JP2743583B2 - Light emitting diode alignment light source 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 light emitting diode array light source device used as a light source for illuminating a document of an image input device such as a facsimile or a scanner.

[0002]

2. Description of the Related Art In recent years, an image input device has been used in a facsimile, a scanner, or the like, which irradiates a document with light to convert an image into an electric signal and transmit the signal. As a light source for reading the original, a light emitting diode (LED chip ) light source is mainly used instead of a conventional fluorescent lamp, halogen lamp, or the like. This type of light-emitting diode light source has a shortage of light emission. Therefore, a configuration is generally used in which a lens is arranged on the light- emitting diode optical axis surface to condense light and cover the light amount shortage.

[0003]

However, as shown in FIG.
In the above-described conventional configuration, since the lens 11 is injection molded, the cost of the mold is high, and in addition, a separate mold is required for each different lens length. Also, since the lens 11 having a concave portion on a part of the outer surface is fitted using a slight claw portion 12 called an undercut in order to mount the lens 11 on the alignment light source, fine adjustment of dimensions is necessary. Yes, it was difficult to set the dimensions of the undercut. In addition, Les when worn
There is a problem that the nail base 13 is easily broken because the lens 11 is press-fitted, the lens 11 comes off from the nail 12 during use, and the nail base 13 is broken by expansion and contraction.

[0004] The present invention is intended to solve the above problems, it is easy to mount the storage container and the condenser lens of the light-emitting diodes,
An object of the present invention is to provide an inexpensive light-emitting diode array light source device that is difficult to break.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a storage container mounted on a printed circuit board and provided on its outer surface with a lens mounting portion parallel to the alignment direction of the light emitting diodes, and a storage container for the storage container. a plurality of light emitting diodes aligned housed in a container, the constitution and a fitting portion which slides fitted with a condenser lens unit having a condenser lens to the mounting portion of the container.

[0006]

According to the present invention, the length and the cross-sectional shape of the condenser lens in the direction perpendicular to the extrusion direction can be freely set by extrusion molding with good workability. By obtaining a condensing lens portion provided with a fitting portion which is slidably fitted to the lens mounting portion, it is easy to mount it on the storage container and hardly broken.

[0007]

1 and 2, a light emitting diode according to the present invention will be described.
An embodiment of a light source device for aligning LEDs will be described. FIG. 1 (a),
FIG. 2B is a plan view of the light emitting diode aligned light source device according to one embodiment of the present invention, and a cross-sectional view taken along line AA of FIG.
FIG. 2 is a perspective view of only the condenser lens unit of FIG.

First, a resin container 2 in which LED chips 1 are aligned and stored is mounted on a printed wiring board 3.

On the outer surface of the container 2, a lens mounting portion 4 is provided which is parallel to the alignment direction of the light emitting diodes. Also the condensing lens unit, provided with a fitting portion 6 and a condenser lens for sliding fit in the lens mounting portion 4, the condenser lens
The storage part is attached to the storage container 2.

[0010] Not only process is not performed cracking of the claw portion at the time of the condenser lens mounting since there is no claw portion for mounting conventionally used by implementing like this, it does not occur cracks in use. The never deviate halfway used for fitting portion 6 across the condenser lens is mounted in a state of holding a lens mounting portion 4 of the container 2 of the light-emitting diodes.

Such a shape can be realized by forming the condenser lens by extrusion molding, and is difficult to realize with a glass lens or a resin lens formed by injection molding. At the same time, since the cross-sectional shape in the direction perpendicular to the extrusion direction can be freely set, a reliable mounting shape can be realized, and the design dimensions can have a margin. In addition, since the length of the condenser lens formed by extrusion molding can be freely set, there is no need to individually make a mold, and the length can be determined at the time of cutting after molding.

[0012]

As is apparent from the above embodiments, according to the present invention, a storage container mounted on a printed wiring board and provided on its outer surface with a lens mounting portion parallel to the alignment direction of the light emitting diodes, and its storage. a light emitting diode that is arranged housed in the container, since it is configured to have a fitting portion which slides fitted to the mounting portion and the condensing lens unit having a condensing lens of said container, a storage container of the light emitting diode It is possible to provide an inexpensive light-emitting diode alignment light source device in which mounting of the condenser lens unit is easy, safe, and difficult to break.

[Brief description of the drawings]

FIG. 1A is a plan view of a light-emitting diode aligned light source device according to an embodiment of the present invention. FIG. 1B is a cross-sectional view taken along the line AA in FIG.

FIG. 2 is a perspective view of a condenser lens unit shown in FIG. 1;

FIG. 3 is a sectional view of a conventional light emitting diode aligned light source device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 LED chip (light emitting diode) 2 Storage container 3 Printed wiring board 4 Lens mounting part 5 Condensing lens 6 Fitting part

Claims (1)

(57) [Claims] 1. A storage container mounted on a printed wiring board and provided on its outer surface with a lens mounting portion parallel to the alignment direction of the light emitting diodes, a plurality of light emitting diodes aligned and stored in the storage container, and the storage container emitting diode alignment light source device for and the fitting portion which slides fitted to the lens attachment portion and the condensing lens unit having a condenser lens, comprising a.