JPH1049084A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device reduced in the number of parts, free from the leakage of light and low in cost. SOLUTION: A push-button switch 2 and a LED 3 are fixed onto a printed circuit board 1 adjacently to each other. A transmission plate 4 of a colorless, transparent synthetic resin is arranged above the push-button 2 and LED 3, and the transmission plate 4 above the push-button 2 is provided with an opening part 5. A pressing part 6 consisting of a repulsive member such as black synthetic rubber is arranged so as to close the opening part 5 to operate the push- button switch 2 fixed onto the printed circuit board 1 by pressing the front face. Further, a side wall 12 surrounding the LED 3 and the transmission plate 4 are arranged in one body, and an inner wall of the surrounding wall 12 is provided with a light shielding wall 13 made of the repulsive member such as black synthetic rubber. The light shielding wall 13 and the pressing part 6 are successively provided, and are formed integrally with the transmission plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device used for a special vehicle such as a construction machine.

[0002]

2. Description of the Related Art Generally, a cross section of a main part of a display device of this kind is as shown in FIG. A push button switch 2 and an LED 3 illuminated by pressing the push button switch 2 are mounted and fixed close to each other on a printed circuit board 1. A transparent plate 4 made of a colorless and transparent synthetic resin is provided above the push button switch 2 and the LED 3, and an opening 5 is provided at four places of the transparent plate on the push button switch 2. The opening 5 has a pressing portion 6 made of an elastic member such as black synthetic rubber.
The push button switch 2 attached and fixed on the printed circuit board 1 is operated by pressing the front surface. The pressing portion 6 is integrally formed with the transmission plate 4 to prevent water or the like from entering the display device from between the pressing portion 6 and the transmission plate 4. The periphery of the transmission plate 4 integrally formed with the pressing portion 6 is formed integrally with an upper case member 7 made of a colored synthetic resin such as gray.

A holder 8 made of an impermeable material is provided around the LED 3 between the transmission plate 4 and the printed circuit board 1 so that light from the LED 3 does not leak to the surroundings. 9 to secure. On the front side of the transmission plate 4, a mark indicating the position of the push button switch 2,
A sheet-like panel 10 on which a display symbol or the like is printed is attached by a double-sided adhesive tape, and a round hole 11 is provided at a position of the panel 10 located directly above the LED 3,
When the LED 3 is turned on, it can be understood that the LED 3 is turned on through the round hole 11.

[0004]

However, in the conventional example, the holder 8 for preventing the light of the LED 3 from leaking to the surroundings is required, and the number of assembling steps is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to provide a display device which can reduce the number of components, does not leak light, and is inexpensive.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a light source is disposed below a transmission plate made of a light-transmitting synthetic resin, and a display unit in which lighting of the light source can be visually recognized. In a display device in which an operation unit that performs a pressing operation below the transmission plate is provided side by side, an opening is provided at a portion of the transmission plate on the operation unit, the opening is closed, and the operation unit can be pressed. The pressing portion to be formed is integrally formed with the transmission plate with a flexible opaque elastic member, and a light shielding wall surrounding the light source is formed by being connected to the pressing portion by the flexible opaque elastic member. It was done.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A push button switch on a printed circuit board and an LE which is turned on by pressing the push button switch
D is attached and fixed in close proximity. A transparent plate made of a colorless and transparent synthetic resin is provided above the push button switch and the LED, and an opening is provided at a portion of the transparent plate on the push button switch. There is a pressing portion so as to close the opening, and the pressing portion is formed so as to operate a push button switch attached and fixed on the printed circuit board by pressing the front surface. Also, LE
A light shielding wall surrounding D is provided so as to be continuous with the pressing portion. The pressing portion and the light shielding wall are made of an elastic member such as black synthetic rubber,
It is formed integrally with the transmission plate. Therefore, even if the push button switch is pressed and the LED is turned on, the light does not leak to the surroundings due to the presence of the light shielding wall.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an embodiment shown in FIG. A push button switch 2 and an LED 3 illuminated by pressing the push button switch 2 are mounted and fixed close to each other on a printed circuit board 1. The push button switch 2 turns on the headlight of the vehicle and also turns on the adjacent LED 3. And push button switch 2 and LED3
A transparent plate 4 made of a colorless and transparent synthetic resin is provided above the above, and an opening 5 is provided at four places of the transparent plate on the push button switch 2. There is a pressing portion 6 made of an elastic member such as black synthetic rubber so as to cover the opening portion 5. The pressing portion 6 is formed so as to operate the push button switch 2 fixed on the printed circuit board 1 by pressing the front surface. I have.

Further, the peripheral wall 12 surrounding the LED 3 is
A light shielding wall 13 made of an elastic member such as black synthetic rubber is provided on an inner periphery of the peripheral wall 12 and a lower end of the peripheral wall 12.
Are formed. The light shielding wall 13 and the pressing portion 6 are provided continuously, and are integrally formed with the transmission plate 4. By providing ribs 14 having a thickness substantially equal to the thickness of the elastic member integrally with the transmission plate 4 on the peripheral end surface of the elastic member, the elastic member and the transmission plate 4 are hardly peeled off. The periphery of the transmission plate 4 is formed integrally with the transmission plate 4 by an upper case member 7 made of a colored synthetic resin such as gray. A mark indicating the position of the push button switch 2 and a sheet-like panel 10 on which a symbol representing a headlight is printed are attached on the front side of the transmission plate 4 with a double-sided adhesive tape.
A round hole 11 is provided at 10 places of the panel located directly above the ED3.

In the display device configured as described above, the panel 10 on which the mark indicating the position of the push button switch 2 is printed.
When the portion is pressed, the pressing portion 6 is elastically deformed downward, the push button switch 2 is pressed, and the LED 3 is turned on. When the push button switch 2 is pressed again, the LED 3 is turned off. The turning on and off of the LED 3 can be confirmed by looking through the round hole 11 provided in the panel 10.

As described above, the peripheral wall 12 surrounding the LED 3 is provided integrally with the transmission plate 4, and the light shielding wall 13 made of an elastic member such as black synthetic rubber is provided on the inner periphery of the peripheral wall 12 and the lower end of the peripheral wall 12.
To form The light shielding wall 13 is connected to the pressing portion 6 so that the LED can be used without using a separate component.
3 can be prevented from leaking to a portion other than the display portion. Further, since the light-shielding wall 13 is provided also at the lower end of the peripheral wall 12, elastic compression can be performed, which is effective for light leakage from between the lower end of the peripheral wall 12 and the printed circuit board 1. Further, by providing the peripheral wall 12 and integrally molding the light shielding wall 13 with the light shielding wall 13, the peripheral wall 12 is stronger than the case where only the light shielding wall 13 made of an elastic member is provided. There is no such thing.

In this embodiment, the transmission plate is colorless and transparent, but any color may be used as long as light is transmitted. Further, the pressing portion and the light shielding wall need not be black, but may be any elastic member having a light shielding property.

[0013]

According to the present invention, a light source is disposed below a transmissive plate made of a light-transmitting synthetic resin as described above, and a display portion that allows the lighting of the light source to be visually recognized is provided. In a display device having juxtaposed operating units to be operated, an opening is provided at a transmission plate portion on the operating unit, and the opening is closed.
In addition, the pressing portion capable of pressing the operation portion is integrally formed with the transmission plate with a flexible opaque elastic member, and the light shielding wall surrounding the light source is pressed by the flexible opaque elastic member. By being formed so as to be continuous with the unit, it is possible to prevent the light of the LED from leaking to parts other than the display unit without using a separate component, and thus it is possible to obtain a low-cost display device.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a display device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a display device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Push button switch (operation part) 3 LED (light source) 4 Transmission plate 5 Opening part 6 Press part (elastic member) 12 Peripheral wall 13 Light shielding wall (elastic member)

Claims (2)

[Claims] A light source is provided below a transmission plate made of a light-transmitting synthetic resin, and a display unit that allows the lighting of the light source to be visually recognized and an operation unit that presses below the transmission plate are provided. In the display device arranged side by side, an opening is provided at a transmission plate portion on the operation unit, and the pressing unit that closes the opening and allows the operation unit to be pressed is formed of a flexible non-permeable elastic member. A display device, which is integrally formed with a transmission plate, and wherein a light-shielding wall surrounding the light source is formed by being connected to the pressing portion by the flexible non-transmissive elastic member. 2. The display device according to claim 1, wherein a peripheral wall integral with the transmission plate is provided on an inner periphery or an outer periphery of the light shielding wall.