JP2002157914A - Luminescent device with socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminescent device 1 with a socket allowing a light irradiation direction to be freely set with a simple means. SOLUTION: A lens part 12 is formed integrally with a transparent cap 11 for protecting an illuminant 2 as a converging means for converging and irradiating light emitted from the illuminant 2 in a desired direction. In addition, a hole 11a and a projection 10d concurrently used as a restriction means and a locking means are formed on the cap 11 and the socket 10, respectively. Thereby, the light can be irradiated with high luminance in a predetermined direction corresponding to the position and the shape of the lens part 12, and the lens part 12 can be positioned with respect to the illuminant 2 at the same time by fixing the cap to the socket. Accordingly, this luminescent device 1 with the socket allowing the light irradiation direction to be freely set can be provided while improving productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device with a socket in which a light emitting body is assembled to a socket, and is suitable for use in a vehicle.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 10-275511, a light emitting diode (LE) has been disclosed.
2. Description of the Related Art A light-emitting device with a socket, in which a light-emitting body having a light-emitting element having electrical polarity such as D) is fixed to a substrate and the substrate is assembled to a socket, is known. The light-emitting device with a socket using this LED has a semi-permanent life and a small power consumption at the time of lighting compared to a conventional light bulb. It is widely used as a warning light. Further, a light emitting device with a socket provided with a transparent cap for dust prevention and protection of the light emitting body is also used.

In recent years, as the design of a meter panel of a vehicle has been diversified, its illumination method has been diversified, and a light emitting device with a socket, which is a light source for illumination, has a function of irradiating only a specific direction. Demand is increasing.

[0004]

However, a conventional light emitting device with a socket emits light with a certain degree of directivity from the surface of the light emitting body, similarly to a conventional light bulb. When it is desired to irradiate light only in a predetermined direction, not only light emitted in directions other than that direction is wasted, but also a light shielding member may be required in some cases. In addition, when it is desired to irradiate light of a predetermined brightness in a predetermined direction, in order to secure the luminous intensity, it is necessary to enlarge or increase the number of light emitters, which causes a problem that mounting becomes difficult. ing.

The present invention has been made in view of the above points, and a light emitting device with a socket capable of efficiently irradiating light in a predetermined direction by a simple means while suppressing an increase in the number of parts and an increase in cost. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention employs the following technical means.

A light emitting device with a socket according to a first aspect of the present invention includes a light condensing means for condensing light emitted from the light emitting body and irradiating the light in a desired direction. Thereby, it is possible to irradiate with higher illuminance in a desired direction.

In this case, by forming the light collecting means integrally with the cap, it is possible to irradiate with higher illuminance in a desired direction without increasing the number of components.

Further, the light converging means is formed in a convex lens shape and the focal position thereof is made coincident with the position of the light emitting element on the light emitting body, so that the light is efficiently radiated in a desired direction at a higher illuminance. can do.

In a light emitting device with a socket according to a fourth aspect of the present invention, the cap and the luminous body are provided with regulating means for regulating the positional relationship between the two. Thus, the positional relationship between the light-collecting means provided on the cap and the light-emitting body can be reliably maintained with high accuracy, and erroneous assembly in the production process can be prevented.

In the light emitting device with a socket according to the fifth aspect of the present invention, the restricting means and the locking means for locking the cap to the socket are used. Thereby, the shapes of the cap and the socket can be simplified. In addition, the positioning and fixing of the cap and the socket can be performed at the same time, and the productivity can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A light emitting device with a socket according to the present invention will be described below with reference to the drawings. In each drawing, the same components are denoted by the same reference numerals.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
It is a longitudinal cross-sectional view of the light emitting device with a socket 1 according to the embodiment. As shown in FIG. 3, for example, the light-emitting device with socket 1 according to the present embodiment is located at the back (rear side) of the instrument display panel of the vehicle.
Is installed in the mounting hole 100a of the panel 100 provided in the vehicle, and is used as illumination of the instrument display panel or as a warning light for notifying the driver of any abnormality. As shown in FIG. 1, the light-emitting device with socket 1 includes a light-emitting body 2 provided with a light-emitting element 3 having a polarity (for example, a light-emitting diode), and a circuit board 5 serving as a holding plate to which the light-emitting body 2 is fixed. A transparent cap 11 for covering the circuit board 5 and the light-emitting body 2, a socket 10 for holding the circuit board 5 and locking the cap 11, and the like.

The light emitting element 2 is formed by molding the light emitting element 3 with a light transmitting material 4 such as synthetic resin or glass, or by housing the light emitting element 3 in a container made of the light transmitting material 4. . The luminous body 2 has two electrical contacts (lead pieces, not shown) on the bottom surface (the surface in contact with the circuit board 5 in FIG. 1), and is electrically connected to the two electrodes of the luminescent element 3, respectively. Have been. Further, the electric contacts of the light emitting body 2 are electrically connected to printed wiring (not shown) on the circuit board 5 by soldering.

The circuit board 5 has printed wirings formed on both surfaces of an insulating plate made of resin or the like, and electronic components (resistance 6, diode 7 and IC 8) are formed on the surface of the board.
Has been assembled. The IC 8 includes an oscillation circuit, a frequency dividing circuit, and an output circuit, and constitutes an electric circuit that controls lighting of the light emitting body 2 (repeatedly blinks at a predetermined cycle, or turns off after lighting for a predetermined time). On the circuit board 5,
Two mounting holes 5a are provided, and these mounting holes 5a are provided.
The ends of a pair (positive side and negative side) of electric wires 9 for making an electrical connection to the outside are inserted into a, and are electrically connected to printed wiring on the surface of the circuit board 5 by soldering.

The socket 10 is formed in a cylindrical shape with a bottom from an insulating material (eg, resin), and has a flange-like flange portion 10a at a predetermined height from the bottom surface. Also,
A cylindrical wall 10b extends cylindrically above the flange portion 10a. When assembling the light-emitting device with socket 1 to the panel 100, the cylindrical wall 10b is attached to the hole 100a of the panel 100.
And the upper surface of the flange 10a is brought into contact with the lower surface of the panel 100 to regulate the position of the light emitting device with socket 1 in the insertion direction. The upper end of the socket 10 is provided with a stepped portion 10c serving as a regulating means and two projections 10d (also used as the regulating means and the locking means). When the cap 11 is fixed to the socket 10, the cap 11
The lower ends of the caps 11 abut each other to restrict their axial positions (up and down directions in FIG. 1).
The cap 11 is fixed to the socket 10 while being locked to the socket 1a and the circumferential positions of the two are uniquely determined. A recess 10 e extending in the axial direction is provided on the inner wall of the socket 10. The circuit board 5 is fitted and held in the recess 10e as shown in FIG. A hole 10f is provided at the bottom of the socket 10 and the electric wire 9 is inserted through the hole 10f.
Are drawn out of the socket 10.

The cap 11 is made of a light-transmitting material (for example,
Polycarbonate resin, acrylic resin, etc.) are formed in a bottomed cylindrical shape. The bottom is formed in a curved shape as shown in FIG. A hole 1 is provided on the opening side of the cap 11.
1a (also used as regulating means and locking means) is the socket 10
Are provided corresponding to the projections 10d. Cap 11
In the figure, a convex lens portion 12 serving as a light collecting means is formed integrally with the cap 11 at a position corresponding to the light emitting body 2 on the circuit board 5. The lens unit 12 that forms the light collecting means
Is preferably provided at a position opposed to a portion (leftward or rightward portion in FIG. 1) closer to the light emitting body 2 from the viewpoint of light collection efficiency. It acts to condense and radiate light. If the light-emitting element 3 of the light-emitting body 2 is provided at the focal position of the lens unit 12, the light can be emitted from the lens unit 12 as a parallel light beam. The outer diameter of the cap 11 is
Is set to be the same as or slightly smaller than the outer diameter of the cylindrical wall 10b.

FIG. 3 shows an example in which the light emitting device with socket 1 of this embodiment is applied to illuminate an instrument display panel of a vehicle. The light-emitting device 1 with a socket is mounted in a mounting hole 100a of a panel 100 provided on the back side of an instrument display panel (not shown). When the light emitter 2 is turned on, the light is condensed by the lens 12, the luminous intensity in the left-right direction in FIG. 3 is amplified, and the light is intensively irradiated toward the prism 101.
Further, the light is guided to a predetermined portion of the instrument display panel by the prism 101.

Next, a method of assembling the light emitting device with socket 1 according to the first embodiment of the present invention will be briefly described. FIG. 4 is an exploded perspective view of the assembled parts of the light emitting device with socket 1 according to the first embodiment of the present invention.

First, the luminous body 2, the resistor 6,
The diode 7 and the IC 8 are soldered. here,
By using a surface mount device (SMD) for the light emitter 2, the resistor 6, the diode 7, and the IC 8, reflow soldering can be applied and the soldering process can be streamlined. Subsequently, the end of the electric wire 9 is inserted into the mounting hole 5a of the circuit board 5 and soldered.

Next, the circuit board 5 is inserted into the socket 10 while being fitted into the recess 10e of the socket 10. At this time, the electric wire 9 is drawn out of the socket 10 through the hole 10f (see FIG. 1) of the socket 10. Here, the dimensional relationship between the circuit board 5 and the concave portion 10e has a slight interference fit with the thickness dimension H and the width dimension W shown in FIG. That is, the insertion of the circuit board 5 into the concave portion 10e can be performed manually by an operator, and the circuit board 5 is set so as to be securely held by the socket 10 after the insertion.

Finally, the cap 11 is fixed to the socket 10 while locking the hole 11a and the projection 10d, and the assembly of the light emitting device 1 with the socket is completed. At this time, the circumferential position between the cap 11 and the socket 10 is
It is univocally determined by the engagement between a and the projection 10d. Therefore, when the cap 11 is fixed to the socket 10, the lens unit 12 automatically comes to a predetermined position with respect to the light emitter 2.

In the light emitting device with socket 1 according to the first embodiment of the present invention described above, the lens unit 12 is formed integrally with the cap 11 by an easy means without increasing the number of parts and cost. In addition, the light of the luminous body 2 can be efficiently condensed and concentratedly radiated in a predetermined direction (in this case, the left-right direction in FIG. 1).

Further, by locking the projection 10d in the hole 11a, the positioning and fixing of the cap 11 and the socket 10 in the circumferential direction are simultaneously performed. Thereby, the assembling workability of the light emitting device with socket 1 can be improved.

Further, the outer diameter of the cap 11 is set to be equal to or slightly smaller than the outer diameter of the cylindrical wall 10b of the socket 10. Thereby, the light emitting device 1 with the socket
Is inserted into the hole 100a of the panel 100 (see FIG. 3).
In this case, the cap 11 is reliably prevented from being caught in the hole 100a, and the mounting workability can be improved.

FIG. 5 is a longitudinal sectional view of a first modification of the light emitting device with socket 1 according to the first embodiment. This first
In the modified example, the connection method between the circuit board 5 and the electric wires 9 is changed from the first embodiment. A terminal 14 was provided at the bottom of the socket 11, and an electrical connection point 5 b provided on the circuit board 5 was fitted to the terminal 14. That is, the circuit board 5 is connected to the electric wire 9 via the terminal 14.
The terminal 14 is provided at a position such that when the circuit board 5 is inserted into the socket 11 while being fitted into the concave portion 10e, the electrical connection point 5b also fits into the terminal 14. Thereby, the work of soldering the electric wire 9 to the circuit board 5 becomes unnecessary, and the workability of assembling the light emitting device with socket 1 can be improved. Further, only the circuit board 5 can be easily replaced.

FIG. 6 is a longitudinal sectional view of a second modification of the light emitting device with socket 1 according to the first embodiment. This second
In the modified example, the method of electrically connecting to the circuit board 5 is changed from the first embodiment. The terminal 15 soldered to the circuit board 5 is connected to the flange 10 of the socket 10.
a, and a flexible circuit board 100 b was provided on the lower surface of the panel 100. An electric circuit (not shown) is formed on the flexible circuit board 100b corresponding to the terminal. Therefore, the light emitting device with socket 1 can be connected to the panel 100 via the flange portion 10b.
, The electrical connection to the light-emitting device with socket 1 can be performed simultaneously. Thereby, electrical connection to the light emitting device with socket 1 can be easily and reliably performed.

(Second Embodiment) FIG. 7 shows a second embodiment of the present invention.
1 is a longitudinal sectional view of a light emitting device with a socket 1 according to the embodiment. In the first embodiment, the light is condensed and emitted in the side direction of the cap 11, but in the second embodiment, the shape and position of the lens unit 12 are changed, and the light is condensed and emitted in the top direction of the cap 11. ing. This lens portion 12 has a convex structure. The shape of the lens unit 12 is changed from the first embodiment. Thereby, in the second embodiment, the light emitted from the light emitter 2 is intensively irradiated upward in FIG. 6, as indicated by the arrow in FIG.

As is clear from the operation of the first and second embodiments, by appropriately setting the shape of the lens portion 12, the direction in which the light from the light emitting device with socket 1 is intensively irradiated can be changed. Can be set freely.

(Third Embodiment) FIG. 8 shows a third embodiment of the present invention.
1 is a longitudinal sectional view of a light emitting device with a socket 1 according to the embodiment. In the third embodiment, the shape and the position of the lens unit 12 are changed from those of the first embodiment, and a reflecting unit 13 is newly provided as a light collecting unit. That is, the light condensing means is constituted by the lens unit 12 and the reflection unit 13,
And a higher light-collecting ability than the second embodiment,
The light-collecting property and the light emission intensity are increased with respect to the top direction.

The reflecting portion 13 is formed by plating or coating the inner surface of the cap 11.
In the third embodiment, the light emitted from the light emitter 2 is intensively irradiated upward in FIG. 8, as indicated by the arrow in FIG.

(Fourth Embodiment) FIG. 9 shows a fourth embodiment of the present invention.
1 is a longitudinal sectional view of a light emitting device with a socket 1 according to the embodiment. In the fourth embodiment, the shape of the lens unit 12 is changed from that of the first embodiment. That is, the shape was changed from a convex lens shape to a concave lens shape. In this case, the illumination range can be widened by dispersing and radiating the light emitted from the luminous body 2. Therefore, when used for display panel surface light emission, uneven brightness can be prevented.

The first embodiment of the present invention described above
In the light emitting device with socket 1 of the third embodiment, the light collecting means (the lens portion 12 and the reflecting portion 13) are formed integrally with the cap 11, but they may be formed separately.

A portion (step 10d, hole 11) serving also as a regulating means and a locking means for the socket 10 and the cap 11 is provided.
Although a) is two sets, one set or three or more sets may be used.

Further, the number of the light emitters 2 is one each provided on both sides of the circuit board 5, but it is needless to say that the number can be increased or decreased as needed.

The number of electronic components (resistor 6, diode 7, IC8) provided on the circuit board 5 can be increased or decreased according to the application.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a light emitting device with a socket 1 according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view showing a state where the light emitting device with socket 1 according to the first embodiment of the present invention is mounted on a panel.

FIG. 4 is an exploded perspective view of an assembly part of the light emitting device with socket 1 according to the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a first modification of the light emitting device with socket 1 according to the first embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a second modification of the light-emitting device with socket 1 according to the first embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a light-emitting device with socket 1 according to a second embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a light emitting device with a socket 1 according to a third embodiment of the present invention.

FIG. 9 is a partial sectional view of a light emitting device with a socket 1 according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light-emitting device with socket 2 Light-emitting body 3 Light-emitting element 4 Translucent material 5 Circuit board (holding plate) 5b Electrical connection point 6 Resistance 7 Diode 8 IC 9 Electric wire 10 Socket 10a Flange part 10b Cylindrical wall 10c Step part (control means) 10d Projection (also used as restriction means and locking means) 10e Recess 10f Mounting hole 11 Cap 11a Hole (also used as restriction means and locking means) 12 Lens part (light collecting means) 13 Reflecting part (light collecting means) 14 Terminal 15 Terminal 100 Panel 100a Hole 100b Flexible circuit board 101 Prism H Thickness dimension W Width dimension

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // F21Y 101: 02 F21S 1/02 G (72) Inventor Akira Sumi 1-1-1, Showa-cho, Kariya-shi, Aichi Pref. F term in DENSO Corporation (reference) 3K013 BA01 CA03 CA05 CA09 CA13 CA16 DA06 5F041 DC07 DC23 DC66 DC81 DC84 FF11

Claims (5)

[Claims] 1. A light-emitting body having a light-emitting element that emits light when energized, a holding plate that holds the light-emitting body by electrically connecting lead pieces of the light-emitting body, and the holding plate is inserted in a press-fit state. And a cap made of a translucent material that is detachably fixed to the socket and covers the illuminant, and a condenser for condensing light emitted by the illuminant and irradiating the light in a predetermined direction. And a light emitting device with a socket. 2. The light-emitting device with a socket according to claim 1, wherein the light collecting means is formed integrally with the cap. 3. The light collecting means according to claim 2, wherein the light condensing means is formed integrally with the inside of the cap in a convex lens shape such that a focal position thereof is a position of the light emitting element on the light emitting body. Light emitting device with socket. 4. The light emitting device with a socket according to claim 2, wherein the cap and the luminous body are provided with regulating means for regulating a positional relationship between the cap and the luminous body. 5. The light emitting device with a socket according to claim 4, wherein said regulating means also serves as a locking means for locking said cap to said socket.