JPH0653261U - Lighting structure of dial - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to provide a lighting structure for a dial which reduces the manufacturing process without lowering the function and reduces the cost. [Structure] The back surface of a dial is illuminated with light from a light source 8 provided inside, and a translucent design portion 2 provided on the dial is provided.
The light that escapes from the surface to the design side of this dial 2
From the light source 8 side, a dial plate 20 for brightly illuminating is illuminated with a halftone dot printing layer 4, a background color printing layer 5 to which a matting agent is added, which is laminated on the halftone dot printing layer 4, It is composed of a light-transmissive resin layer 3 laminated on the color print layer 5 and a light-shielding print layer 1 having a light-transmitting design portion 2. As a result, it is possible to realize an illumination structure of a dial having the same effect as the conventional one while reducing the printing process in the dial manufacturing process by one step.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dial plate illumination structure, and in particular, a light source is provided on the back surface of a dial plate of an instrument panel used for a vehicle combination meter and the like, and the design formed on the dial plate is illuminated by light from the light source. The lighting structure of the dial.

[0002]

[Prior art]

 Conventionally, in the case of analog type meters that display a state quantity with a pointer, for example, analog type meters such as a speedometer and an engine tachometer that are provided in a combination meter of an automobile, a driver or other visual observer The state quantity is determined by reading the scale on the dial located at the tip.

Therefore, in the conventional pointer-type instrument, a scale design is formed on the dial, and a meter internal device is attached to the back side of the scale design and a pointer is attached to the front side to display the scale design with the pointer. There is. On the other hand, in such a pointer-type instrument, a vehicle equipped with the instrument may travel at night, so it is necessary to illuminate the dial and pointer to improve visibility at night. Some of these illuminations illuminate the dial from the front side and some illuminate the dial from the back side.

FIG. 2 is a front view of a single dial plate of the conventional pointer type instrument for illuminating the dial plate as described above, which illuminates the dial plate from the back side, and FIG. It shows the cross-sectional structure.

In FIG. 2, 10 is a single dial plate of the instrument, 11 is a dial plate surface of the single dial plate 10 which is plain white or black, 12 is a speed display provided on the dial plate surface 11, etc. The design portion 13 is a through hole that penetrates the rotary shaft of the internal machine, that is, the rotary shaft of the pointer, provided on the back side of the dial plate. The structure of the conventional dial plate 11 is as shown in the sectional view of FIG. That is, first, a light-shielding print layer 1 having a light-transmitting design portion 2 is provided on the front surface side, and a ground color print layer 7 that determines the display color of the design portion 2 is provided on the back surface thereof, and a light-transmitting light transmission layer is provided thereunder. The resin layer 3 was provided.

Further, below the translucent resin layer 3, in order to suppress the amount of illumination light from the light source 8, a light control dot printing layer 4 on which halftone dots are printed is provided. Between the halftone dot printing layer 4 for light and the translucent resin layer 3, in order to prevent reflection of halftone dots printed on the light modulating halftone dot printing layer 4 on the surface side, light from the light source 8 is emitted. The printing layer 6 for spreading the halftone dots was provided.

[0007]

[Problems to be solved by the device]

 However, when making such a conventional dial plate 10 as described above, first, a transparent resin plate is prepared as the translucent resin layer 3, and the ground color printing layer 7 is printed on the surface side of the transparent resin plate. By printing the design color that becomes the design part 2 on the same as the light-shielding printing layer 1 for forming the design, and then printing the halftone dot diffusion printing layer 6 and the light control halftone dot printing layer 4 on the back surface side. Since it is formed, there are problems in that the number of manufacturing processes is large and the unit price of the single dial 10 is high.

In view of the above, the present invention provides an instrument for illuminating the dial from the back side, which can achieve the same effect as the conventional dial illuminating structure and requires fewer manufacturing steps than the conventional dial. It is an object of the present invention to provide a lighting structure for a dial that can reduce the unit price of the dial.

[0009]

[Means for Solving the Problems]

 The dial plate illumination structure of the present invention which achieves the above-mentioned object, illuminates the back surface of the dial plate with light from a light source provided inside, and transmits light to the front side from the translucent design portion provided on the dial plate. According to the lighting structure of the dial for brightly illuminating the design part of the dial, the dial is printed from the light source side to the dimming halftone dot printing layer, and the matte layer laminated on the halftone dot printing layer. It is characterized in that it is composed of a ground-color printing layer to which an agent is added, a light-transmitting resin layer laminated on the ground-color printing layer, and a light-shielding printing layer having a light-transmitting design portion. .

[0010]

[Action]

 According to the dial plate illumination structure of the present invention, the printing layer for dot diffusion and the ground color printing layer, which are required in the conventional dial plate illumination structure, are eliminated, and the effect of these two layers is matted. The single ground-color printing layer containing the agent also provides a dial plate illumination structure with the same effect as the conventional dial plate illumination structure in the printing process in the dial plate manufacturing process. It can be achieved by reducing by one step.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the construction of one embodiment of the dial plate illumination structure of the present invention. A section of the dial plate unit 10 of the instrument for illuminating the dial plate shown in FIG. It shows the composition. In this embodiment, the same components (printing layers) as those in the conventional illumination structure of the dial shown in FIG. 3 are designated by the same reference numerals.

As shown in FIG. 1, in the dial illumination structure of the present invention, in the case where the back side B of the dial is illuminated by the light from the light source 8 provided inside the instrument, the dial unit 20 is From the light source 8 side, the light-modulating halftone dot printing layer 4, the matt agent-added ground color printing layer 5 laminated on the halftone dot printing layer 4, and the ground color printing layer 5 are laminated. The light-transmitting resin layer 3 and the light-shielding print layer 1 having the light-transmitting design portion 2 are included.

That is, in this embodiment, the dot diffusion printing layer 6 and the ground color printing layer 7 in the conventional dial plate illumination structure shown in FIG. 3 are eliminated, and the effect of these two layers is matted. One ground color printing layer 5 to which the agent is added serves also.

When making such a dial plate 20, a transparent resin plate is first prepared as the translucent resin layer 3, and a design color to be the design portion 2 is printed on the surface side thereof and the design is applied. Only the shading print layer 1 for forming is printed. Next, a background color printing layer 5 to which a matting agent for halftone dot diffusion is added and a halftone dot printing layer 4 for light control are formed on the back side by printing. As described above, according to the present invention, in the printing on the surface side of the transparent resin layer 3, it is possible to omit the printing of the background color printing layer in the related art, so that the manufacturing process can be reduced as compared with the conventional method, and the dial plate 20 alone. The unit price of can be made lower than before.

In the dial plate illumination structure configured as described above, the illumination light from the light source 8 that has passed through the halftone dots of the halftone dot printing layer 4 is generated in the ground color printing layer 5 to which the matting agent is added. Since the light is diffused by the matting agent and further diffused, attenuated, and refracted while passing through the light-transmitting resin layer 3, the transmitted light visually transmitted through the light-transmitting design portion 2 is The halftone dots are not visible as in the case of the dial plate illumination structure.

As described above, according to the present invention, the same effect as that of the conventional dial plate illumination structure can be obtained without printing for preventing the reflection of halftone dots, which is required in the conventional dial plate illumination structure. Since it can be obtained, the cost of the dial of the instrument can be reduced.

[0018]

[Effect of device]

 As described above, according to the present invention, in the instrument for illuminating the dial from the back side, the dial plate illumination structure having the same illumination effect as the conventional one can be manufactured at a low unit cost with a small number of manufacturing steps. The effect is that you can.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of a dial plate illumination structure of the present invention, showing a cross-section of a single dial plate in a portion A of FIG.

FIG. 2 is a front view showing a single dial in an instrument for illuminating the dial from the back side.

FIG. 3 is a sectional view showing an illumination structure of a conventional dial in section A of FIG.

[Explanation of symbols]

 1 Light-shielding printing layer 2 Light-transmitting design part 3 Light-transmitting resin layer 4 Halftone dot printing layer for light control 5 Ground color printing layer with matting agent 6 Conventional halftone dot printing layer 7 Conventional ground color Printing layer 8 Light source 20 Single dial plate of the present invention

Claims (1)

[Scope of utility model registration request] 1. A design part of the dial is brightened by illuminating the back surface of the dial with light from a light source provided inside and shining to the front side from a light-transmitting design part provided on the dial. An illumination structure of a dial for illuminating, wherein the dial is, from the light source side, a light-modulating halftone dot printing layer, and a ground color printing layer laminated on the halftone dot printing layer. , A translucent resin layer laminated on this ground color printing layer,
An illumination structure for a dial, comprising: a light-shielding print layer having a light-transmitting design portion.