JP2003017750A - Multiple light source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple light source where no irregularity of image is produced, efficiency is high, and assembly is easy. SOLUTION: This multiple light source is provided with a holder 121 having a plurality of through holes 131; and an LED lamp 101 which is composed of a cannon shot shaped lamp body housing a semiconductor light emitting part as a light source where a flange is formed at its base end side, and two lead wires for supplying a current to the semiconductor light emitting part and which is inserted into the through hole 131.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-light source having a plurality of light emitting parts, more specifically, a plurality of LEDs (Li.
The present invention relates to a multi-light source using ght Emitting Diodes).

[0002]

2. Description of the Related Art An LED is a semiconductor element that emits light when a current is applied to a semiconductor manufactured by adding gallium (Ga), phosphorus (P), arsenic (As), etc. to silicon (Si).

Some multi-light sources using a plurality of LEDs have a plurality of chip LEDs mounted on a substrate.

[0004]

However, the multi-light source using a plurality of chip LEDs having the above structure has the following problems. (1) Since the chip LED has many variations in wavelength and light amount, when used in an image forming apparatus, image unevenness is likely to occur. (2) Since the light emitted from the chip LED is diffused light, the efficiency is low. (3) When the chip LEDs are mounted on the substrate, the positional accuracy of each chip LED is poor and image unevenness easily occurs.

The present invention has been made in view of the above problems, and a first object thereof is to provide a multi-light source in which image unevenness does not occur. The second problem is to provide an efficient multi-light source.

A third object is to provide a multi-light source which can be easily assembled.

[0007]

According to a first aspect of the invention for solving the above-mentioned problems, in a multi-light source including a plurality of LEDs, a holder having a plurality of through holes formed therein and a semiconductor light emitting portion which is a light emitting source are provided. A substantially shell-shaped lamp body that is housed and has a brim portion formed on the base end side; and an LED lamp that is composed of two lead wires that supply current to the semiconductor light emitting portion and that is inserted into the through hole. It is a multi-light source characterized by having.

By inserting the LED lamp into the through hole of the holder, the positional accuracy of the LED lamp is improved and image unevenness does not occur. Further, the LED lamp is relatively easy to select the wavelength, the amount of light, etc., as compared with the chip LED, so that the efficiency is improved.

The invention according to claim 2 is the multi-light source according to claim 1, characterized in that the axis of each of the through holes is directed toward the center of the light collecting means. The axis of each through hole is directed toward the center of the light converging means, so that the amount of light condensed by the light converging means increases.

Further, when the LED lamp is inserted into the through hole, the alignment in the optical axis direction is easy. The invention according to claim 3 is characterized in that the opening of the through hole on the back surface side of the holder is a countersink shape with which the collar portion of the LED lamp abuts. is there.

The opening of the through hole on the rear surface side of the holder has a countersink shape with which the flange portion of the LED lamp abuts, so that the direction of the LED lamp can be easily adjusted. Also,
When inserting the LED lamp through the countersink-shaped opening of the through hole of the holder, the conical surface of the countersink-shaped opening and the corner of the flange of the LED lamp come into line contact, and when fixing the LED lamp with an adhesive. Moreover, the adhesive is prevented from dripping into the lamp body of the LED lamp.

According to a fourth aspect of the present invention, the opening of the through hole on the rear surface side of the holder is in the shape of a counterbore to which the collar portion of the LED lamp abuts. Is a multi-light source.

Since the opening of the through hole on the rear surface side of the holder is in the shape of a counterbore with which the collar portion of the LED lamp abuts, the direction of the LED lamp can be easily adjusted. Also, from the opening of the counterbore hole of the through hole of the holder to the LED
When inserting the lamp, make a
Since the collar portion of the ED lamp is in surface contact, a strong adhesive strength can be obtained when fixing with an adhesive.

The invention according to claim 5 is the multi-light source according to any one of claims 1 to 4, characterized in that the LED lamp is bonded to the holder with an ultraviolet-curing instant adhesive. .

The LED lamp is adhered to the holder with an ultraviolet curable instant adhesive so that the lamp body does not become cloudy even if the adhesive adheres to the lamp body.
The invention according to claim 6 is the multi-light source according to claim 5, wherein the instant adhesive is covered with a plastic resin.

When the LED lamp is repeatedly turned on and off, thermal stress may be repeatedly generated in the bonded portion and the LED lamp may be displaced. However, by covering the instantaneous adhesive with a plastic resin, It is possible to prevent the displacement.

The invention according to claim 7 is the multi-light source according to claim 5 or 6, characterized in that the instantaneous adhesive is covered with a filler having high thermal conductivity. When the LED lamp is turned on, a large amount of heat is generated.

By covering the flexible resin with a filler having a high thermal conductivity, heat dissipation is improved. According to an eighth aspect of the invention, a plate having high electrical insulation is provided on the back surface side of the holder, in which a lead wire of the LED lamp is inserted and a through hole having a diameter gradually decreasing toward the back is formed. The multi-light source according to any one of claims 1 to 7, characterized in that.

Since the lead wire of the LED lamp is inserted into the rear surface of the holder and a plate having a through hole whose diameter gradually decreases as it goes deeper is provided, the extending directions are different. Lead wires can be aligned in one direction.

Further, since the plate is made of a material having a high electric insulation property, there is no short circuit.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention.

First, an example of an image forming apparatus provided with the multi-light source according to the present embodiment will be described with reference to FIG.
As shown in the figure, each of the first to third light sources 1, 3, and 5 is provided with a multi-light source described later.

The light emitted from each of the light sources 1 and 3 enters the focusing means 11 through the half mirrors 7 and 9 and the third light source 5 through the half mirror 9, and is focused on the recording medium 13. To be done. Next, the multi-light source 21 provided in the first to third light sources 1, 3, 5 will be described with reference to FIG. Figure 1 (a)
The figure is a cross-sectional view taken along the section line AA in the figure (b), the figure (b) is a partially cutaway front view, and the figure (c) is a bottom view.

In these figures, the holder 121 is composed of a plate-shaped base portion 123 and a wall portion 125 provided along the peripheral portion of the back surface 123a which is one surface of the base portion 123.

Back surface 123 of base 123 of holder 121
A plurality of through holes 131 are formed from a to the surface 123b. Then, the LED lamp 101 is inserted through the opening of the through hole 131 on the back surface 123a side of the base portion 123.

L used in the multi-light source of the present embodiment
As shown in FIG. 2, the ED lamp 101 accommodates a semiconductor light emitting unit 103 that is a light emitting source, and a flange 105 on the proximal end side.
A substantially shell-shaped lamp body 107 made of resin in which
Two lead wires 1 for supplying current to the semiconductor light emitting unit 103
It consists of 09.

Returning to FIG. 1, the axis of each through hole 131 differs depending on the location, and the axis of each through hole 131 has the light collecting means 11.
It is set to go to the center of. Further, the mounting of the LED lamp 101 in the present embodiment has a structure as shown in FIG.

In the figure, the back surface 123 of each through hole 131 is shown.
The opening on the side a is a countersink 131a with which the corner 105a on the side of the lamp body 107 of the flange 105 of the LED lamp 101 can abut.

Then, the countersink portion 131a of the holder 121.
And the collar portion 105 of the LED lamp 101 are adhered to each other with an ultraviolet curable instant adhesive (in this embodiment, 1773D manufactured by ThreeBond Co., Ltd.) 201.

A flexible resin (3033 manufactured by ThreeBond Co., Ltd. in the present embodiment) is formed on the instantaneous adhesive 201.
A filler having a high thermal conductivity, which is covered with 203 and further has a space formed by the wall 125 (KE3493 or KE1204 manufactured by Shin-Etsu Chemical Co., Ltd. in this embodiment) 2
Filled with 05.

Returning to FIG. 1, the lead wire 109 of the LED lamp 101 is inserted on the back side of the holder 121.
Through hole 301 whose diameter gradually decreases as it goes deeper
A plate 303 having a high electric insulation is formed.

According to the above structure, the following effects can be obtained. (1) Insert the LED lamp 101 into the through hole 13 of the holder 121.
The position accuracy of the LED lamp 101 is improved by inserting the LED lamp 1 into the LED lamp 1, and the image unevenness does not occur.

The LED lamp 101 is a chip LED.
Compared with, it is relatively easy to select the wavelength, the amount of light, etc., so that the efficiency is improved. (2) Since the axis of each through hole 131 is directed toward the center of the light collecting means 11, the amount of light collected by the light collecting means 11 increases.

Further, the LED lamp 101 is provided with a through hole 131.
When the LED lamp 101 is inserted into the optical disc, the alignment of the LED lamps 101 in the optical axis direction also becomes easy. (3) In the opening on the back surface side of the holder 121 of the through hole 131,
By forming the countersink portion 131a with which the corner portion 105a of the collar portion 105 of the LED lamp 101 abuts, the LED
It becomes easy to adjust the direction of the lamp 101 (the plane direction perpendicular to the optical axis).

When the LED lamp 101 is inserted through the countersink portion 131a of the through hole 131 of the holder 121,
The conical surface of the countersink 131a and the corner 105a of the flange 105 of the LED lamp 101 make a line contact, and when the LED lamp 101 is fixed with the instantaneous adhesive 201, the instantaneous adhesive 201 is the lamp body of the LED lamp 101. It is prevented from leaning into 107.

(4) The LED lamp 101 is adhered to the holder 121 with an ultraviolet curable instant adhesive 201, which is cured by ultraviolet rays in a portion protruding from the adhered portion. Even if 201 is attached to the lamp body 107, the lamp body 107 does not become cloudy.

(5) When the LED lamp 101 is repeatedly turned on and off, thermal stress may be repeatedly generated at the bonded portion and the LED lamp 101 may be displaced, but the instantaneous adhesive 201 is covered with a plastic resin. By covering with 210, it is possible to prevent the displacement.

(6) When the LED lamp 101 is turned on, a large amount of heat is generated. By covering the flexible resin 203 with the filler 205 having high thermal conductivity, heat dissipation is improved.

(7) L on the back surface 123a of the holder 121
Since the lead wire 109 of the ED lamp 101 is inserted and the plate 303 having the through hole 301 whose diameter becomes gradually smaller as it goes deeper is provided, the lead wires 109 having different extending directions can be arranged in one direction. You can arrange.

Further, since the plate 303 is made of a material having high electric insulation, it does not cause a short circuit.
The present invention is not limited to the above embodiments.

In the above-mentioned embodiment, the opening on the back surface 123a side of each through hole 131 is L as shown in FIG. 3 (a).
The lamp body side 107 of the collar portion 105 of the ED lamp 101
Although the countersink portion 131a that can come into contact with the side corner portion 105a is used, it may be a counterbore hole portion 131b as shown in FIG. 3B.

By providing such a spot facing hole portion 131b, it becomes easy to adjust the direction of the LED lamp 101 (the plane direction perpendicular to the optical axis). In addition, when the LED lamp 101 is inserted from the counterbore hole portion 131b of the through hole 131 of the holder 121, the LED lamp 101 and the counterbore hole portion 131b of the holder 121 are inserted.
Since the flange portion 105 of the ED lamp 101 is in surface contact, a strong adhesive strength can be obtained when the ED lamp 101 is fixed using the instant adhesive 201.

[0043]

As described above, according to the first aspect of the present invention, by inserting the LED lamp into the through hole of the holder, the positional accuracy of the LED lamp is improved and image unevenness does not occur.

Further, in the LED lamp, it is relatively easy to select the wavelength, the amount of light, etc., as compared with the chip LED, so that the efficiency is improved. According to the invention of claim 2, the axis of each through hole is directed toward the center of the light converging means,
The amount of light collected by the light collecting means increases.

Further, the positioning when inserting the LED lamp into the through hole is easy. According to the invention of claim 3, the opening of the through hole on the back surface side of the holder is the LED.
By the countersunk shape of the flange of the lamp,
The direction of the LED lamp can be easily adjusted.

Further, when the LED lamp is inserted through the countersunk opening of the through hole of the holder, the conical surface of the countersink-shaped opening and the corner of the flange portion of the LED lamp make a line contact, and L
When fixing the ED lamp with an adhesive, the adhesive is prevented from dripping into the lamp body of the LED lamp.

According to the fourth aspect of the present invention, the opening of the through hole on the rear surface side of the holder has a counterbore shape with which the flange portion of the LED lamp abuts, so that the direction of the LED lamp can be adjusted. It will be easy.

Further, when the LED lamp is inserted through the counterbore-shaped opening of the through hole of the holder, the counterbore-shaped opening of the holder and the collar portion of the LED lamp are in surface contact with each other.
A strong adhesive strength can be obtained when fixing with an adhesive.

According to the invention described in claim 5, the LED
The lamp is adhered to the holder with an ultraviolet curable instant adhesive so that the lamp body does not become cloudy even if the adhesive adheres to the lamp body.

According to the sixth aspect of the invention, since the LED lamp is repeatedly turned on and off, thermal stress may be repeatedly generated at the bonding portion, and the LED lamp may be displaced. By covering the agent with a plastic resin, it is possible to prevent displacement.

According to the invention of claim 7, when the LED lamp is turned on, a large amount of heat is generated. By covering the flexible resin with a filler having high thermal conductivity, heat dissipation is improved.

According to the eighth aspect of the invention, the lead wire of the LED lamp is inserted into the back surface side of the holder,
By providing the plate in which the through hole whose diameter becomes gradually smaller as it goes deeper, it is possible to align the lead wires having different extending directions in one direction.

Further, since the plate is made of a material having a high electric insulation property, it does not cause a short circuit.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a multi-light source according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating the LED lamp of FIG.

FIG. 3 is a diagram illustrating how the LED lamp of FIG. 1 and a holder are attached.

FIG. 4 is a diagram illustrating an example of an image forming apparatus provided with the multi-light source of FIG.

[Explanation of symbols]

101 LED lamp 103 Semiconductor light emitting unit 105 brim 107 lamp body 109 lead wire 121 holder 131 through hole 201 Instant adhesive 203 filler 205 filler

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Narita             Konica Stock, 1 Sakura-cho, Hino City, Tokyo             In the company F-term (reference) 5F041 AA14 AA38 AA39 DB02 DC08                       DC22 DC66 EE11 FF06

Claims (8)

[Claims] 1. A multi-light source comprising a plurality of LEDs, a holder in which a plurality of through holes are formed, a semiconductor light emitting portion which is a light emitting source, and a flange portion formed on a base end side. 2. A multi-light source, comprising: a lamp main body; and an LED lamp which is composed of two lead wires for supplying a current to the semiconductor light emitting section and is inserted into the through hole. 2. The multi-light source according to claim 1, wherein the axis of each through hole is directed toward the center of the light collecting means. 3. The multi-light source according to claim 1, wherein the opening of the through hole on the back surface side of the holder has a countersink shape with which the collar portion of the LED lamp abuts. 4. The multi-light source according to claim 1, wherein the opening of the through hole on the back surface side of the holder has a counterbore shape with which the collar portion of the LED lamp abuts. 5. The multi-light source according to claim 1, wherein the LED lamp is adhered to the holder with an ultraviolet curable instant adhesive. 6. The multi-light source according to claim 5, wherein the instant adhesive is covered with a plastic resin. 7. The multi-light source according to claim 5, wherein the instant adhesive is covered with a filler having high thermal conductivity. 8. A plate having high electrical insulation, in which a lead wire of the LED lamp is inserted and a through hole having a diameter that gradually decreases toward the back is provided on the back side of the holder. The multi-light source according to any one of claims 1 to 7.