JP2889913B2 - Light emitting diode display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial application field >> The present invention relates to a light emitting diode display device which is mainly attached to an operation surface of a telephone or the like and displays an operation state of a push button arranged on the operation surface.

<< Prior Art >> Conventionally, a plurality of push buttons are provided on an operation surface of a telephone or the like, and by operating these push buttons, a call or the like is performed, and the operation state of the push buttons is displayed on the operation surface. Light-emitting diodes (LE
D) Some display devices are arranged side by side.

The above-mentioned display device usually uses a discrete LED a as shown in FIG. 3. The mounting method is as follows. A mounting hole is provided for each push button b in a housing d in which the push button b is mounted on a printed circuit board c. e, and these mounting holes e
A terminal a 'is soldered to a printed circuit board c.

When the chip LED f is used for the light emitting element,
As shown in the figure, a tapered reflecting surface g is formed on a printed circuit board c.
Is mounted, a chip LED f and a transparent lens i are housed in the lamp house h, and a diffusion lens j is fitted into the upper opening of the lamp house h.

<< Problems to be Solved by the Invention >> However, in the former display device using the discrete LED a, the discrete LED a is manually moved to the housing d.
Since the terminal a 'is soldered to the printed circuit board c by being inserted into the mounting hole e, there is a problem that when there are a large number of push buttons b, the mounting operation requires a lot of trouble and the work efficiency is poor.

In addition, since the upper surface of the discrete LED a is exposed on the upper surface of the housing d, the static electricity is easily discharged to the terminal a ', and the hole opened on the surface of the operation panel and the discrete LED a are attached when the terminal a is incorporated into a telephone or the like. There is a problem that it takes a lot of time to align the mounting hole e and the workability is poor.

On the other hand, in the case of using the latter chip LED f, since the lamp house h having the reflection surface g is used for each chip LED f, the cost increases and the whole display device becomes expensive, and the inside of the chip LED f is increased. Has a reflecting plate f 'in advance, so that the reflecting surface g in the lamp house h hardly functions and the reflecting function is wasted.

The present invention is intended to solve such a problem. The first object of the present invention is to improve the operability by mechanizing the mounting work which has been manually performed one by one when using a discrete LED. It is another object of the present invention to provide a light emitting diode display device capable of absorbing rattling of a lens and preventing light leakage.

Further, a second object of the present invention is to increase the creepage distance from the surface of the diffusion lens to make it difficult for static electricity to be discharged, and at the same time to be independent of the angle at which the user looks at the display unit. It is an object of the present invention to provide a light emitting diode display device capable of uniformly viewing light.

It is a third object of the present invention to provide a light emitting diode display device which facilitates assembling work, reduces cost, and can be provided to a user at low cost.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention firstly provides a plurality of chip LEDs and a plurality of contacts respectively corresponding to the plurality of chip LEDs. A printed circuit board provided with a plurality of contacts disposed near a chip LED on an upper surface, and a housing to which a plurality of push buttons respectively corresponding to the plurality of contacts are attached, wherein the plurality of chips are provided.
A housing provided with a plurality of mounting holes respectively corresponding to the LEDs and provided above the chip LED, and a transparent lens for guiding light emitted from the chip LED, each corresponding to the plurality of chip LEDs. A transparent lens comprising a plurality of transparent lens portions and a connecting portion for integrally connecting the plurality of transparent lens portions, and a diffusion lens located above the transparent lens, corresponding to the plurality of chip LEDs, respectively. A diffusion lens comprising a plurality of diffusion lens portions for diffusing light guided by the plurality of transparent lens portions and a connection portion connecting the plurality of diffusion lens portions, and a plurality of contact points on the printed circuit board, respectively. A plurality of rubber contacts, the operation of the push button,
A plurality of rubber contacts each performing an on / off operation with a corresponding contact, and a conductive rubber contact provided with a plurality of window holes respectively corresponding to the plurality of chip LEDs, and the housing includes The transparent lens and the diffusion lens are accommodated in the mounting hole, and the corresponding chip LED is accommodated in the window hole of the conductive rubber contact, and the corresponding rubber contact is located above the contact on the printed circuit board. At the same time, the conductive rubber contact is brought into contact with the printed circuit board so that the connection portion of the transparent lens is brought into contact with the inductive conductive rubber contact and the lens is pushed up to the housing side by the elastic force of the conductive rubber contact. It is arranged between the transparent lens.

Second, a handle is provided on a part of the diffusion lens,
Further, a mark is provided on a portion of the housing corresponding to the handle.

<< Operation >> Therefore, according to the light-emitting diode display device of the first invention, the mounting operation, which has been manually performed one by one when using the discrete LED, can be mechanized, and the workability can be improved. In addition to absorbing rattling of the lens,
Light leakage can be prevented. In addition, the creepage distance from the surface of the diffusion lens can be increased to make it difficult for static electricity to be discharged, and at the same time, it becomes possible to see light uniformly regardless of the angle at which the user views the display unit. Further, assembling workability is facilitated and light can be seen.

Further, according to the light emitting diode display device of the second invention, it is possible to prevent an erroneous assembly in the assembling work.

<< Embodiment >> An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. 1 and FIG.

FIG. 1 is a partial cross-sectional view of a light emitting diode display device juxtaposed with a push button, and FIG. 2 is an exploded perspective view of the same.

In these figures, 1 denotes a push button, 2 denotes a housing, 3 denotes a printed circuit board, 4 denotes a chip LED, 5 denotes a transparent lens, and 6 denotes a diffusion lens.

As shown in FIG. 2, the printed circuit board 3 has a large number of contacts 3a formed on the upper surface thereof.
D4 is mounted, and a rubber contact 7 is mounted on the printed circuit board 3.

The rubber contact 7 has a protruding portion 7a located on the contact 3a formed on the printed circuit board 3, and a rubber contact 7b on the back surface of the protruding portion 7a which comes into contact with and separates from the contact 3a.

The rubber contact 7 is provided with a window hole 7c through which the chip LED 4 mounted on the printed circuit board 3 is exposed.

Also, a guide hole 2a corresponding to the contact 3a formed on the printed circuit board 3 is formed in the housing 2 of the push button 1, and the push button 1 can be accommodated in the guide hole 2a of the housing 2. .

That is, a cylindrical portion 1a is formed on the back surface of the push button 1, and the cylindrical portion 1a is inserted from above into a guide hole 2a formed in the housing 2, and the cylindrical portion 1a is formed on the inner peripheral surface of the guide hole 2a. The push button 1 moves up and down while the portion 1a is guided, and the lower end surface of the cylindrical portion 1a is in contact with the upper surface of the protrusion 7a of the rubber contact 7.

On the other hand, the housing 2 is provided with mounting holes 2b elongated in the horizontal direction for each push button 1, and the diffusion lens 6 and the transparent lens 5 are fitted into the mounting holes 2b from below in this order.

The transparent lens 5 has a flat and high lens portion 5a for each push button 1, and these lens portions
The upper end side is formed so as to be gradually narrower so as to converge the emitted light upward, and the lower ends of these lens portions 5a are connected to each other by a plate-shaped connecting portion 5b and integrated. ing.

The diffusing lens 6 also has a diffusing portion 6a for each push button 1. These diffusing portions 6a are lower in height than the lens portion 5a of the transparent lens 5, and the lower portion is a connecting portion 6b.
And are integrated with each other.

A handle 6c protrudes from the lower portion of the connecting portion 6b at a position slightly closer to the end portion than the center portion. The handle 6c makes it easy to hold the diffusion lens 6 and a mounting hole for the housing 2. At the time of assembling into the 2b, the handle 6c is aligned with the ridge 2c which is a mark protruding from the side surface of the housing 2 so that the method of assembling the diffusion lens 6 can be determined.

Next, the operation will be described. In assembling the push button 1,
The diffusion lens 6 and the transparent lens 5 are inserted into the mounting hole 2b of the housing 2 from below in this order, and the housing 2 is mounted on the printed circuit board 3. At this time, the peripheral edge 7d of the window hole 7c of the rubber contact 7 is closed. The diffusion lens 6 is interposed between the transparent lens 5 and the substrate 3 and elastically pushes up the transparent lens 5 from below toward the housing 2.
2d so that there is no play in the mounting of the lenses 5, 6 and the diffusion lens 6 and the mounting hole
It is possible to prevent light from leaking from the opening between 2b.

Further, the push button 1 attached to the guide hole 2a of the housing 2 is urged upward by the elasticity of the protrusion 7a of the rubber contact 7, and when the push button 1 is pressed down against this urging force, the protrusion 7a Is elastically deformed, the rubber contact 7b provided on the back surface of the protruding portion 7a is brought into contact with the contact 3a on the printed circuit board 3, and the contact between the contacts 7b, 3a can be turned on.

<< Effects of the Invention >> As described above, the light-emitting diode display device of the present invention first has a plurality of contacts respectively corresponding to the plurality of chip LEDs, and is arranged near the corresponding chip LED. A printed circuit board provided with a plurality of contacts provided on an upper surface thereof, and a housing provided with a plurality of push buttons respectively corresponding to the plurality of contacts, wherein the plurality of chips LE are provided.
D, a housing provided with a plurality of mounting holes located above the chip LED, and a transparent lens for guiding light emitted from the chip LED, each corresponding to the plurality of chip LEDs. A transparent lens comprising a plurality of transparent lens portions and a connecting portion for integrally connecting the plurality of transparent lens portions, and a diffusion lens located above the transparent lens, corresponding to the plurality of chip LEDs, respectively. A diffusion lens comprising a plurality of diffusion lens units for diffusing light respectively guided by the plurality of transparent lens units and a connection unit for connecting the plurality of diffusion lens units;
A plurality of rubber contacts respectively corresponding to a plurality of contacts on the printed circuit board, a plurality of rubber contacts for performing on / off operations between the corresponding contacts by operating the push button, and the plurality of chip LEDs A conductive rubber contact provided with a plurality of window holes respectively corresponding to the transparent rubber and the diffusion lens in the mounting hole of the housing, and a window hole of the conductive rubber contact. A corresponding chip contact is accommodated in each, and a corresponding rubber contact is located above a contact on the printed circuit board, and a connecting portion of the transparent lens is brought into contact with the conductive rubber contact to form the conductive rubber. The conductive rubber contact is connected to the printed circuit board so that the lens is pressed against the housing by the elastic force of the contact. Since those arranged between the light lens, it is possible to improve the mechanization can workability mounting operation which has been performed in one single hand during discrete LED used.

Also, since the connecting portion of the transparent lens is brought into contact with the conductive rubber contact and the lens is pushed up to the housing side by the elastic force of the conductive rubber contact, the rattling of the lens is absorbed and light leakage is prevented. Can be prevented.

In addition, a connecting portion is provided at a portion in contact with the conductive rubber contact of the transparent lens, and the diffusing lens can be exposed on the surface of the housing, and the creepage distance from the surface of the diffusing lens is increased, so that static electricity is not easily discharged. LED chips that can be and led by transparent lenses
Can be diffused by the diffusing lens, so that the user of the telephone or the like can see the light uniformly by observing the display unit from an oblique direction, and the visibility is also improved.

Furthermore, the light emitting diode display device of the present invention, which is a display device on a printed circuit board on which a large number of chip LEDs are mounted, facilitates assembly work and reduces cost,
It has the effect that it can be provided at low cost to users. Second, the light emitting diode display device of the present invention is configured by providing a handle on a part of the diffusion lens and providing a mark on a portion of the housing corresponding to the handle. It is possible to prevent an erroneous assembly in the operation and to improve the yield in manufacturing.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a light emitting diode display device according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, and FIGS. 3 and 4 are explanatory views of a conventional light emitting diode display device. 1 ... push button, 2 ... housing, 2b ... mounting hole, 3 ... printed circuit board, 4 ... chip LED, 5 ... transparent lens, 6 ... diffusion lens.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04M 1/23 H04M 1/23 D (72) Inventor Junichiro Imai 94 for character shipyard in Koriyama-shi, Fukushima Prefecture Hitachi Telecom Technology, Inc. ( 72) Inventor Tomonobu Watanabe 94, Kojiyama-shi, Fukushima Prefecture, Hitachi Telecom Technology Co., Ltd. (56) References JP-A 1-181084 (JP, U) JP-A 62-42092 (JP, U) Showa 58-59090 (JP, U) Actually open Showa 57-130386 (JP, U)

Claims (2)

(57) [Claims] 1. A printed circuit board having, on an upper surface thereof, a plurality of chip LEDs and a plurality of contacts respectively corresponding to the plurality of chip LEDs, the plurality of contacts being arranged near the corresponding chip LEDs. A housing provided with a plurality of push buttons respectively corresponding to the plurality of contacts, each housing corresponding to the plurality of chip LEDs and provided with a plurality of mounting holes located above the chip LEDs; A transparent lens for guiding light emitted from the chip LED, a transparent lens comprising a plurality of transparent lens portions respectively corresponding to the plurality of chip LEDs and a connecting portion for integrally connecting the plurality of transparent lens portions to each other; A diffusion lens located above the transparent lens,
For each of the plurality of chip LEDs, a diffusion lens including a plurality of diffusion lens units that diffuse light guided by the plurality of transparent lens units and a connection unit that connects the plurality of diffusion lens units, A plurality of rubber contacts respectively corresponding to a plurality of contacts on the printed circuit board, a plurality of rubber contacts for performing on / off operations between the corresponding contacts by operating the push button, and the plurality of chip LEDs A conductive rubber contact provided with a plurality of window holes respectively corresponding to the transparent rubber and the diffusion lens are accommodated in a mounting hole of the housing, and a window hole of the conductive rubber contact is provided. Corresponding chip in
Each of the LEDs is accommodated, and a corresponding rubber contact is located above the contact on the printed circuit board, and the connecting portion of the transparent lens is brought into contact with the conductive rubber contact, and the elastic force of the conductive rubber contact is used. The light emitting diode display device, wherein the conductive rubber contact is disposed between the printed circuit board and the transparent lens so as to push the transparent lens and the diffusion lens toward the housing. 2. A light-emitting diode display device according to claim 1, wherein a handle is provided on a part of said diffusion lens, and a mark is provided on a portion of said housing corresponding to said handle.