JPH0447621Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a display device that is installed in a vehicle instrument and provides information display or warning display.

[Prior art]

In recent years, in place of incandescent light bulbs, self-luminous elements such as light emitting diodes using semiconductors have been used in this type of display devices.
A structure disclosed in Japanese Patent No. 74196 is known.

This involves connecting and fixing a self-luminous element to a printed wiring board via a light-transmitting holder, and exposing the self-luminous element to the display surface side through an insertion hole in the display board via an indicator chip formed integrally with the holder. It is something to do.

[The problem that the idea attempts to solve]

However, it is inconvenient to incorporate self-luminous elements into a printed wiring board that is far away from the display board, and when vibrations are applied to the device, the assembly status may become uncertain due to rattling of each member. There is.

In addition, in the case of a structure in which the translucent display part of the display board is transmitted and illuminated with light from a light source, not only is a separate light guiding member required, but also the insertion of the display board to expose the self-luminous elements. There is a concern that light may leak through the hole, leading to a risk of incorrect display.

[Purpose of invention]

In view of these circumstances, the present invention is easy to assemble, provides a reliable assembly state, prevents chattering at the assembly part under vibration when installed in a vehicle, and has a transparent display section on the display board. It is an object of the present invention to provide a display device which can simplify the structure and prevent erroneous display of self-luminous elements without adding additional members even when transmitting and illuminating a self-luminous element.

[Means to solve the problem]

The present invention provides a light guide plate that transmits light from a light source and illuminates the display part behind a display plate on which a translucent display part is formed, and a cylindrical part that penetrates the light guide plate. A holder made of a flexible material with a self-luminous element mounted inside the cylindrical part is disposed, and an insertion hole having an inner diameter smaller than the external shape of the holder is formed in the display plate, and a hole is formed between the display plate and the light guide plate. The holder is held between the two, and at least the upper part of the self-luminous element is exposed to the display surface side through the insertion hole.

[Effect]

According to the present invention, the self-luminous element has a structure in which it is sandwiched between the display board and the light guide plate at the same time as they are joined together.
Installation work is easy.

Furthermore, since the self-luminous element is disposed via a holder made of a flexible material, a stable state can be obtained by utilizing the flexure of the holder, and an absorption effect can also be obtained when vibrations are applied.

Furthermore, since the light guide plate that transmits and illuminates the translucent display portion of the display board serves as a fixing member for the self-luminous element, no new member is required.

Moreover, even if the light guided by this light guide goes toward the insertion hole of the display board, it can be reduced by the holder.

〔Example〕

1 to 3 show an embodiment of this invention. Reference numeral 1 denotes an indicator that is attached to a suitable location on a vehicle. In a housing 2 of this indicator 1, an instrument main body 3 is housed and fixed. , a dial plate 4 is fixed above the instrument body 3. The dial plate 4 consists of a display plate 6 on which a translucent display part 5 is formed and a light guide plate 7 disposed in close contact behind the display plate 6. It can be read by comparing it with the scales and numbers displayed.

Further, mounting cylindrical portions 9 are formed at appropriate locations on the light guide plate 7 toward the back side of the light guide plate 7, and insertion holes 10 are formed at corresponding positions on the display plate 6. The cylindrical portion 9 has a large diameter portion 9a and a small diameter portion 9.
b penetrates the front and back surfaces of the light guide plate 7.

Reference numeral 11 denotes a light-emitting diode that serves as a self-luminous element that is electrically connected to a display device that is an object of display on a vehicle, such as an engine oil pressure detection switch, and is colored to cover a light-emitting chip. The light emitting part of the transparent lens 12 is exposed to the display surface side through the insertion hole 10 of the display plate 6.

Furthermore, the light emitting diode 11 has a colored transparent lens 1.
The light emitting part of the light guide plate 7 is exposed and its lower part is attached to a bottomed hollow holder 13 made of a flexible material such as rubber. The provided collar portion 14 and the small diameter portion 9b
It has a lead-out portion 15 that penetrates through and protrudes to the back surface,
Furthermore, an annular portion 16 is formed in the upper portion to be positioned between the insertion hole 10 of the display panel 6 and the colored transparent lens 12.

Further, a lead wire 17 for supplying power to the light emitting chip inside the colored transparent lens 12 is led out from the bottom of the holder 13 through a hole.

In addition, an instrument illumination lamp 18 is disposed at the bottom of the housing 2 at an appropriate location on the back side of the light guide plate 7, and when the lamp 18 is turned on, the irradiated light is guided into the light guide plate 7, and the display plate 6 is transparent. The gender display section 5 is illuminated from behind.

Therefore, the holder 1 is placed at the cylindrical portion 9 position of the light guide plate 7.
Attach the light emitting diode 11 assembled inside 3,
At the same time as the display plate 6 is fixed on the light guide plate 7, the light emitting diode 11, which is a self-luminous element, can be easily attached and fixed on the dial plate 4. In this case, the collar portion 14 of the holder 13 with the light emitting diode 11 assembled is installed on the large diameter portion 9a of the cylindrical portion 9, and the cylindrical portion 9
The lead-out portion 15 of the holder 13 is inserted through the small diameter portion 9b of the holder 13 and protrudes from the back side of the dial 4, and the lead wire 17 is routed to the outside.

Furthermore, when the light emitting diode 11 is assembled, the light emitting diode 11 can be protected by the flexible holder 13, and even after the light emitting diode 11 is assembled, the holder 13 can absorb external vibrations. Become. In this case, the display board 6
Since the annular portion 16 of the holder 13 is interposed in the gap between the through hole 10 of the light emitting diode 11 and the colored transparent lens 12 of the light emitting diode 11, it is possible to provide a buffering effect and improve vibration resistance.

In addition, the external shape of the holder 13, in this embodiment the collar 14, is formed larger than the inner diameter of the insertion hole 10 and extends to the side of the insertion hole 10 behind the insertion hole 10, so that the light guide plate 7 It is also possible to reduce the amount of light directed toward the guided insertion hole 10.

Figure 4 shows a second embodiment of this invention.
Here, a mounting cylindrical part 9 is recessed in the light guide plate 7, and an insertion hole 10 is formed at the corresponding position of the display plate 6, and the cylindrical part 9 has a large diameter part 9a and a small diameter part 9.
b penetrates the front and back surfaces of the light guide plate 7.

Also, the colored transparent lens 12 of the light emitting diode 11
A bottomed hollow holder 13 made of a flexible material and attached to the lower part is fitted into the large diameter part 9a of the cylindrical part 9 and is formed to such an extent that it does not come out from the small diameter part 9b.

Therefore, the holder 13 in which the light emitting diode 11 is assembled is attached to the cylindrical portion 9 of the light guide plate 7, and the display plate 6 is installed and fixed on the light guide plate 7, and at the same time, the light emitting device is placed between the light guide plate 7 and the display plate 6. A holder 13 in which a diode is assembled can be held.

[Effect of idea]

As detailed above, by assembling a holder made of an elastic material around the self-luminous element and attaching and fixing the holder between the light guide plate and the display plate that make up the dial, individual fixing can be achieved. A self-luminous element can be easily fixed without using any parts, and an assembly structure of a display device can be constructed in which vibration resistance and impact resistance can also be considered.

In addition, the present invention has a structure in which the translucent display portion of the display board is illuminated by a light guide plate, and the light from the light source guided by the light guide plate is also guided to the insertion hole of the display board. Since the insertion hole is smaller than the outer shape of the holder, this holder can also reduce light leakage, making it possible to provide a display device with great practical value.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is an enlarged sectional view of the main part of Fig. 2, and Fig. 4 is a cross-sectional view of the main part of Fig. 4. FIG. 3 is an enlarged sectional view showing two embodiments. Dial board...4, Display part...5, Display board...6,
Light guide plate...7, Mounting cylindrical part...9, Insertion hole...
10, Light emitting diode...11, Holder...1
3. Lead wire...17, Lamp...18.

Claims (1)

[Scope of utility model registration request] A light guide plate for transmitting and illuminating the light from the light source to the display part is arranged behind the display board on which the translucent display part is formed, and a cylindrical part passing through the light guide plate is formed. A holder made of a flexible material equipped with a self-luminous element is provided, and an insertion hole having an inner diameter smaller than the external shape of the holder is formed in the display plate,
A display device, wherein the holder is held between the display plate and the light guide plate, and at least the upper part of the self-luminous element is exposed to the display surface side through the insertion hole.