JP2003115201A - Semiconductor light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a semiconductor light emitting device which prevents fixed members from relatively rotating, and prevents a shift in a light irradiation direction. SOLUTION: A socket 2 on which a base end of a light emitting rod 1 for reflecting light passing through the inside from the side to the outside is mounted, and a light source provided inside the socket 2 and supplying light to the base end of the light emitting rod 1 In the semiconductor light emitting device 1a having the printed wiring board 6 to which the light emitting diode 5 is attached, the first and second positionings for regulating the relative circumferential positions are provided at the base ends of the socket 2 and the light emitting rod 1. Part 1
5 and 16 are respectively formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor light emitting device using a light emitting diode (LED), and more particularly to a semiconductor light emitting device having a socket to which a light emitting rod can be attached and detached.

[0002]

2. Description of the Related Art Conventionally, optical fiber rods having various shapes and structures have been devised and used. A commonly used optical fiber rod has a clad made of acrylic resin provided on the outside of a core made of transparent resin to cause total internal reflection between the core and the clad, and the light incident on the base end in the axial direction. Is transmitted to the tip to cause the tip to emit light. However, the fiber optic rod with this configuration
The purpose is to transmit the light incident from the base end to the tip without attenuation.If you want to use it for the purpose of causing the light guide part of the optical fiber rod to emit light, the light emission is weak and it is visible from the side. The sex is bad.

An optical fiber rod having a structure shown in FIG. 4 is applied to the purpose of such light emission. As shown in the figure, in the optical fiber rod 71 formed in a hard and cylindrical shape, a light reflection layer 74 made of a special resin long in the axial direction is provided between the clad 72 and the core 73. The light-reflecting layer 74 reflects the light passing through the inside of the core 73 to the side and emits light with strong directivity.

[0004]

However, in the above-mentioned conventional optical fiber rod 71, it is necessary to inject light from one end in the axial direction in order to make it emit light, but since it is a member formed in a cylindrical shape, It is easy to rotate relative to the socket where you attach. Since the optical fiber rod 71 is provided with the light reflecting layer 74 on its side,
It cannot be used because the direction of light will change when it is rotated.

Further, when the orientation of the printed wiring board mounted in the socket and having the light emitting diode for supplying light to the optical fiber rod 71 is changed, the wiring may be twisted and stress may be applied, resulting in disconnection.

Therefore, an object of the present invention is to provide a semiconductor light emitting device which prevents the fixed members from rotating relative to each other and prevents the deviation of the light irradiation direction.

[0007]

In order to solve the above problems, the semiconductor light emitting device of the present invention has first and second positioning portions for restricting the circumferential position relative to the socket and the light emitting rod. .

According to the present invention, since the first and second positioning portions are formed, it is possible to prevent the fixed members from rotating relative to each other and prevent the deviation of the light irradiation direction. A semiconductor light emitting device is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a socket to which a base end of a light-emitting rod that reflects light passing through the inside from a side surface to the outside is mounted, and the light-emitting rod provided inside the socket. A semiconductor light emitting device having a printed wiring board on which a light emitting diode serving as a light source for supplying light is attached to the base end of the socket and the light emitting rod. A semiconductor light emitting device having a first positioning portion and a second positioning portion, respectively. With this configuration, the socket and the light emitting rod are prevented from relatively rotating, and the irradiation direction of the light emitting rod is regulated. It

According to a second aspect of the present invention, the socket and the printed wiring board are respectively formed with third and fourth positioning portions for restricting relative positions in the circumferential direction. The semiconductor light-emitting device according to item 1, wherein the configuration suppresses twisting of the printed wiring board and the wiring connected thereto with respect to the socket.

According to a third aspect of the invention, there is provided a semiconductor light emitting device according to the first or second aspect, characterized in that a mounting protrusion is formed on an outer side portion of the socket. The position at which the socket is fixed at a predetermined position is easily regulated, and the light emitting direction of each light emitting rod is directed to the predetermined direction.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a front sectional view showing a semiconductor light emitting device according to an embodiment of the present invention, FIG. 1B is a partial plan sectional view of the same semiconductor light emitting device, and FIG. 1C is a part of the same semiconductor light emitting device. FIG. 2A is a side sectional view, FIG. 2A is a sectional view showing first and second positioning portions of the semiconductor light emitting device, and FIG. 2B is a sectional view showing third and fourth positioning portions of the semiconductor light emitting device. (C)
FIG. 3 is a side view of the semiconductor light emitting device.

In FIG. 1, a light emitting rod 1 such as an optical fiber rod is a cylindrical member having a core and a clad (not shown), and a light reflecting layer made of a special resin extending in the axial direction is arranged between the core and the clad. ing. The socket 2 of the semiconductor light emitting device 1a is a cylindrical member to which a light emitting rod can be fitted and fixed on the front side. The socket 2 and the light emitting rod 1 have a base end portion that regulates a relative circumferential position. The 1st and 2nd positioning parts 15 and 16 are formed, respectively. As shown in FIGS. 1 (A) and 2 (A), the first and second positioning portions 15 and 16 are flat portions formed on a part of the outer peripheral portion, and with the configuration, the light emitting rod 1 and The socket 2 is connected in a relatively non-rotatable state.

A ring-shaped projection 11 is provided in the middle portion of the inside of the socket 2, and the ring-shaped projection 11 has a socket 2
Is provided with a printed wiring board 6 which is inserted from the light emitting rod 1 side and whose outer peripheral portion is hooked. A light emitting diode 5 serving as a light source for supplying light to the base end portion of the light emitting rod 1 is attached to the front side of the printed wiring board 6.

As shown in FIGS. 1 (A) and 2 (B), the printed wiring board 6 is formed in a D shape similar to the second positioning portion 16, and a part of the linear portion has a U-shape. -Shaped notches are formed. In addition, a positioning rib that fits into the cutout of the printed wiring board 6 is formed inside the socket 2, and by this positioning rib and the cutout,
Third and fourth positioning portions 17 and 18 are respectively configured.

At the rear end of the socket 2, a disc member 9 is externally fitted to a mounting portion 10 integrally connected to a part of the inner circumference of the socket 2. The disk member 9 is fastened and fixed to the socket 2 with a fixing screw 13a. Mounting part 1
At the center of 0, there is provided a mounting boss portion 8 that protrudes inward of the socket 2 and contacts the back side of the printed wiring board 6, and a female screw 7 is formed in a through hole formed in the mounting boss portion 8 in the axial direction. Are formed. A mounting hole through which the fixing screw 13 penetrates is formed in the center of the printed wiring board 6 from the front side, and the printed wiring board 6 and the mounting boss portion 8 are fixed by the fixing screw 13 screwed into the female screw 7. .

On a part of the outer circumference of the socket 2 adjacent to the disk member 9, a mounting projection 12 is formed which projects rearward. Wiring connected to the printed wiring board 6 is drawn out from the opposite side of the mounting projection 12 on the outer peripheral portion of the socket 2. By the protrusion 12 for mounting,
The orientation of the light emitting rod 1 and the orientation of the wiring during mounting are restricted.

FIG. 3 is an explanatory view of the male screw portion and the fastening groove formed on the front side of the socket of the semiconductor light emitting device.

A part of the front side of the socket 2 is formed with a fastening groove 14 that is cut out in the axial direction, and the outer periphery thereof is formed gradually narrower toward the front side. 19 is formed.

A cylindrical nut member 20 having a female screw portion formed inside is screwed onto the outside of the male screw portion 19. By screwing the nut member 20 in, the width of the fastening groove 14 of the socket 2 is narrowed, the inner diameter of the front side of the socket 2 is reduced, and the light emitting rod 1 is securely fastened and fixed.

[0022]

According to the present invention, the first end portion and the second end portion for restricting the relative circumferential position are formed at the base end portions of the socket and the light emitting rod, respectively. The relative rotation of the rod is prevented, the irradiation direction by the light emitting rod is regulated, and the light emitting rod can be securely attached. Especially, when a plurality of light emitting rods are attached, the respective irradiation directions can be adjusted. It can be aligned in the same direction without. Further, by forming the third and fourth positioning portions for regulating the relative circumferential positions of the socket and the printed wiring board, respectively, twisting of the printed wiring board and the wiring connected thereto with respect to the socket is prevented. Therefore, the reliability of the product can be improved by suppressing the failure such as disconnection.
Further, by forming a mounting projection on the outer side of the socket, the position when fixing the plurality of sockets at predetermined positions is easily regulated, and the light emitting directions of the respective light emitting rods are respectively directed to the predetermined directions. The time can be shortened.

[Brief description of drawings]

1A is a front sectional view showing a semiconductor light emitting device according to an embodiment of the present invention, FIG. 1B is a partial plan sectional view of the semiconductor light emitting device, and FIG. 1C is a partial side sectional view of the semiconductor light emitting device.

FIG. 2A is a sectional view showing first and second positioning portions of the semiconductor light emitting device, and FIG. 2B is a sectional view showing third and fourth positioning portions of the semiconductor light emitting device. Side view of the same semiconductor light emitting device

FIG. 3 is an explanatory view of a male screw portion and a fastening groove formed on a front side of a socket of a semiconductor light emitting device.

FIG. 4 is an explanatory view of an optical fiber rod according to a conventional example.

[Explanation of symbols]

1 luminous rod 1a Semiconductor light emitting device 2 socket 5 light emitting diode 6 printed wiring board 7 female screw 8 Mounting boss 9 Disc member 10 Mounting part 11 Ring-shaped protrusion 12 Mounting protrusion 13, 13a Fixing screw 14 Fastening groove 15 First positioning part 16 Second positioning part 17 Third positioning part 18 Fourth positioning part 19 Male thread 20 Nut member

Claims (3)

[Claims] 1. A socket to which a base end of a light emitting rod that reflects light passing through the inside from a side surface to the outside is mounted, and a light source that is provided inside the socket and supplies light to the base end portion of the light emitting rod. In a semiconductor light emitting device having a printed wiring board having a light emitting diode attached thereto, first and second positioning portions for regulating relative circumferential positions are formed at base ends of the socket and the light emitting rod, respectively. A semiconductor light emitting device characterized by the above. 2. The semiconductor light emitting device according to claim 1, wherein the socket and the printed wiring board are respectively formed with third and fourth positioning portions for restricting relative positions in the circumferential direction. . 3. The semiconductor light emitting device according to claim 1, wherein a mounting protrusion is formed on the outer side of the socket.