JP2020041974A - Measuring device - Google Patents

Abstract

To provide a measuring device having a light adjusting unit behind the scale, the scale securing a sufficient illuminance.SOLUTION: The measuring device includes: a character plate 1 arranged in front of a light source 7 and having a scale 21; a light guide member 2 arranged behind the character plate 1; and a light adjusting unit 32 behind the light guide member 2 in a position facing the scale 21. The light adjusting unit 32 has an entirely printed solid light adjusting unit; and a dot light adjusting unit in which separate dots are printed around the solid light adjusting unit.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to an instrument device, and particularly to an instrument device mounted on a vehicle.

  An instrument panel including a speedometer and a tachometer is arranged on an instrument panel of a vehicle. As disclosed in Patent Literature 1, a meter device includes a dial (a dial) fixed to a middle case (housing), a frame portion that surrounds a character display area of the dial, and a character on the dial. And a light source for illuminating the dial from behind, the frame being incapable of transmitting light from the light source. Wherein the protruding scale is an instrument device formed so as to be able to transmit light from the light source, and is provided at a predetermined interval in a range corresponding to the frame portion behind the protruding scale. The light control device includes a light control portion (color filter) that transmits only the color light, and a light reflection portion disposed behind the light control portion.

JP 2009-008592 A

  However, since the light control portion is formed in a range corresponding to the frame portion, the light control range of the light from behind is large, and there is a problem that the luminance of the projected scale becomes too dark. In addition, when there is another scale (for example, a scale smaller than the scale) near the protruding scale, the range of the light control unit extends to a range behind the scale, and the other scale becomes dark. There was a point.

  Then, this indication is made in view of the said problem, and it aims at ensuring the brightness | luminance of a scale in the meter apparatus which has a light control part behind a scale.

  The present disclosure includes: a light source 7; a dial 1 disposed in front of the light source 7 and having graduations 21, 22, 12a, and 12b; and a light guide member 2 disposed behind the dial 1. A dimming section 32 is provided behind the light guide member 2 at a position facing the scales 21 and 22. The dimming section 32 includes a solid dimming section 32a printed without gaps and the solid dimming section. And a dot dimming unit 32b on which dots having a gap around 32a are printed.

  ADVANTAGE OF THE INVENTION According to this indication, in the meter device which has a light control part behind a scale, the brightness | luminance of a scale can be ensured and a highly visible meter device can be provided.

FIG. 1 is a front view of an instrument device according to a first embodiment of the present disclosure. Sectional drawing along the AA line in FIG. FIG. 3 is a positional relationship diagram of the dial 1, the light guide member 2, and the diffusion member 3 as viewed from the arrow Y in FIG. 2. FIG. 4 is a diagram illustrating a second embodiment of the present disclosure in FIG. 3. FIG. 3 is a diagram illustrating a second embodiment of the present disclosure in FIG. 2.

  Hereinafter, a case where the instrument device of the present disclosure is applied to a vehicle instrument mounted on a vehicle will be described with reference to FIGS. 1 to 5 as an example.

  In the following description, the “front side” means the near side in FIG. 1 and the upper side (the dial 1 side) in FIG. 2 and the side visually recognized by a viewer (driver). The “back (rear) surface side” means the back side in FIG. 1 and the lower side (circuit board 5 side) in FIG.

Hereinafter, a first embodiment of the present disclosure will be described.
As shown in FIG. 1, the meter device 100 is provided with various meters such as a speedometer 101 and a tachometer 102. Each of the speedometer 101 and the tachometer 102 includes a character (number) 11 and a scale 12 serving as an index displayed on the dial 1, and a pointer 6 indicating an index.

  The other end of the pointer 6 rotates around one end thereof. A plurality of characters 11 and graduations 12 arranged on the outer peripheral side corresponding to the characters 11 are displayed on the dial 1 along the rotation locus of the other end of the pointer 6. As a result, a display area is formed on the periphery of the speedometer 101 and the tachometer 102.

  The dial 1 is made of a transparent or translucent translucent polycarbonate resin or the like having a thin plate-shaped base material printed on its front and back surfaces with light-transmitting and light-shielding ink. The dial 1 is provided with a raised portion 13 which is inclined from the center of the speedometer 101 and the tachometer 102 toward the outer front side by hot plate pressure forming so as to border around the character 11 of the speedometer 101 and the tachometer 102. The base of the dial 1 is a dark color such as black, whereas the raised portion 13 has a light color such as silver metallic. Thus, when the driver turns his or her eyes to the meter device 100, the positions of the speedometer 101 and the tachometer 102 can be instantaneously grasped. The scale 12 is arranged on the raised portion 13.

  Behind the dial 1, a light guide member 2 is provided. The light guide member 2 is made of, for example, a transparent PMMA (acrylic) resin or the like, and is formed in a disk shape. The light guide member 2 is in contact with the dial 1 behind the central portion (character 11) of the speedometer 101 and the tachometer 102, and is formed in a tapered shape behind the raised portion 13. The scale 12 has a projecting scale (scale) 21 in which a part of the light guide member 2 behind the raised portion 13 projects to the front. The tip of the protrusion scale 21 penetrates the scale hole 14 of the protrusion 13 and protrudes from the surface of the protrusion 13.

  The graduations 12 are arranged at middle positions (graduations) 12a which are arranged at intermediate positions for dividing the space between the projecting graduations into two, and four graduations 12 are provided at positions which equally divide the space between the projecting graduation 21 and the middle graduation 12a into five. Small scale (scale) 12b.

  As shown in FIG. 2, the dial 1 is fixed to a middle case (case body) 4. The middle case 4 is made of a white synthetic resin (for example, polypropylene). The middle case 4 includes a bowl-shaped depression 41 in a region where the speedometer 101 and the tachometer 102 are formed. A light source 7 for illuminating the dial 1 from behind is provided at the center bottom of the bowl-shaped depression 41.

  The light source 7 is configured by a white light emitting diode (LED: Light Emitting Diode) or the like. The light source 7 is mounted on the circuit board 5 and illuminates the dial 1 disposed in front of the circuit board 5.

  The circuit board 5 is formed of a hard wiring board in which a wiring pattern (not shown) is formed on a flat glass epoxy base material such as FR-4 (Frame Retardant-4), and is used for lighting the light source 7. Control means (not shown) for outputting a command signal, and various circuit components (not shown) such as resistors and capacitors are electrically connected to the wiring pattern.

  Behind the light guide member 2, a diffusion member 3 is provided. The diffusion member 3 is formed by printing a light-transmissive ink on the front and back surfaces of a thin plate-shaped substrate made of, for example, a transparent or translucent light-transmitting polycarbonate resin. The diffusing member 3 is formed in a disk shape, is arranged behind the display area (the area of the character 11) in contact with the light guide member 2, and is arranged at a predetermined interval (for example, from 1) behind the raised portion 13 (projected scale 21). (Approximately 2 mm).

  The diffusing member 3 has a relatively small transmittance (for example, 30 to 50% transmittance) at a portion opposed to the projecting graduation 21 on the back side and a diffusing portion 31 formed of diffusible white ink over the entire area on the front side. ) The light control section 32 is formed of black ink (black smoke ink). As shown in FIG. 3, the light control section 32 includes a solid light control section 32a printed on one surface without any gap, and a halftone light control section 32b printed with a collection of small points having a gap. The solid light control section 32a and the halftone light control section 32b are formed in the same printing process, that is, are formed of the same ink.

  The solid dimming portion 32a is formed in a range that is larger by about 1 mm to 2 mm than the front view shape of the protruding scale 21 from the Y direction in FIG. 2, and the halftone dimming portion 32b is formed around the solid dimming portion 32a. Is formed in a range larger than the shape of the protruding scale 21 by about 2 mm to 3 mm. The solid dimming section 32a is formed in a range that does not overlap the small scale 12b (a range that does not face), while the halftone dimming section 32b is formed in a range that overlaps the small scale 12b (a range that faces the small scale).

  Behind the diffusion member 3, a bowl-shaped depression 41 of the middle case 4 is arranged. Since the middle case 4 is made of a white resin material or the like, the bowl-shaped depression 41 functions as a light reflection part (reflector). That is, the light reflection unit is arranged behind the light control unit 32 at a predetermined distance.

Next, the operation and effect of the meter device 100 according to the present embodiment will be described.
In the daytime, strong external light such as sunlight enters the protruding scale 21. This external light is reflected by the diffusion portion 31 of the diffusion member 3, passes through the projection scale 21, and is emitted outside. The emitted light is reflected by the diffusion unit 31 and becomes white light. Thereby, the occupant of the vehicle visually recognizes the protruding scale 21 as white. In addition, the light source 7 is turned on even in the daytime, but since the external light is dominant, the projected scale 21 is visually recognized in white. Thereby, the white protruding scale 21 can be made to stand out in the raised portion 13 of the silver metallic color.

  At night, a part of the light emitted from the light source 7 is reflected by the light reflecting portion, passes through the diffusing member 3 (the diffusing portion 31 and the dimming portion 32), passes through the projecting scale 21, and passes through the outside. Out. The emitted light passes through the diffusion unit 31 and the light control unit 32, and becomes white light. Thereby, the occupant of the vehicle visually recognizes the protruding scale 21 as white. It should be noted that weak external light enters the protruding scale 21 even at night, but since the light from the light source 7 is dominant, the protruding scale 21 is visually recognized as white.

  By being formed in this way, light transmitted through the light control section 32 transmits through the solid light control section 32a and the halftone light control section 32b. The light transmitted through the halftone dimmer 32b has a larger transmission amount than the light transmitted through the solid dimmer 32a. The amount of light transmitted by the dimmer 32 can be adjusted by adjusting the density of small points of the halftone dimmer 32b to adjust the luminance of the projected scale 21. Therefore, compared to the case where the transmittance of the solid dimming unit 32a is adjusted, the adjustment of the luminance of the projecting scale 21 can be facilitated, and an instrument device with high design efficiency can be provided.

  Further, the halftone dimming portion 32b is formed in a range overlapping with the small graduation 12b. Therefore, as compared with the case where the solid dimming portion 32a is formed in a range overlapping with the small graduation 12b, it is possible to easily secure the luminance of the small graduation 12b, and it is possible to provide an instrument device with high visibility.

  Further, since the light control section 32 is formed behind the diffusion section 31, the light transmitted through the solid light control section 32 a and the halftone light control section 32 b is diffused by the diffusion section 31. Therefore, the occupant of the vehicle can visually recognize the boundary between the solid dimming part 32a and the halftone dimming part 32b, which is seen through the protruding scale 21, by blurring, so that it is possible to provide an instrument device with high appearance and commercial value. it can.

  Further, since the light control section 32 has the gap G between the light guide member 2 and the diffusion member 3, the light transmitted through the diffusion section 31 is diffused when entering the light guide member 2. Therefore, the occupant of the vehicle can visually recognize the boundary between the solid dimming part 32a and the halftone dimming part 32b that are seen through the protruding scale 21 by being blurred. Can be.

  FIG. 4 illustrates a second embodiment of the present disclosure. The same parts and equivalent parts as those in the first embodiment described above are denoted by the same reference numerals and described.

  In the present disclosure, the halftone dimming unit 32b gradually decreases the density of small points as the part facing the small graduations 12b becomes farther (away) from the solid dimmer 32a (the density of the gap gradually increases). Formed) in a gradation form.

  With such a configuration, it is possible to reduce the influence of light blocking on the small graduations 12b of the halftone dot light control section 32b. Therefore, it is possible to easily secure the luminance of the small scale 12b, and it is possible to provide a highly visible instrument device. If the luminance of the small scale 12b is too bright, the luminance can be reduced to the target luminance by adjusting the halftone dimming unit 32b.

  Although the instrument device of the present disclosure has been described as an example in the configuration of the above-described embodiment, the present disclosure is not limited to this, and other configurations do not depart from the gist of the present disclosure. It goes without saying that various improvements and design changes can be made in.

  For example, in the embodiment, a light source that emits white light is used as the light source 7, but a light source that emits another color light may be used. Further, in the embodiment, the projecting scale 21 is made of a transparent material (all-color light transmitting material). However, the projecting scale 21 may be made of a specific color light transmitting material.

  Further, in the embodiment, the light guide member 2 has a projecting scale 21 partly projecting to the front, but as shown in FIG. 5, a concave scale (scale) 22 partly recessed toward the circuit board 5 behind. It may be. Further, in the embodiment, the dimming part 32 is provided on the back side of the diffusion member 3. However, as shown in FIG. 5, the diffusion part 31 is formed by printing on the back side of the light guide member 2, and a concave scale is provided behind the diffusion part 31. The light control section 32 may be formed by printing at a position facing the light-receiving section 22.

  The present disclosure relates to an instrument device for a vehicle, and can be applied to, for example, an instrument device for a vehicle mounted on a vehicle such as an automobile or a motorcycle, or a moving body including an agricultural machine or a construction machine.

1 Dial 12a Medium scale (scale)
12b Small scale (scale)
2 Light guide member 21 Projection scale (scale)
22 concave scale (scale)
Reference Signs List 3 diffusion member 32 dimmer 32a solid dimmer 32b halftone dimmer 7 light source

Claims (5)

A light source, and a dial having a scale disposed in front of the light source;
A light guide member disposed behind the dial,
A light control unit is provided behind the light guide member at a position facing the scale,
The instrument device according to claim 1, wherein the dimming unit includes a solid dimming unit printed without a gap and a halftone dimming unit printed with a dot having a gap around the solid dimming unit. The instrument device according to claim 1, wherein the light guide member has a projecting scale partly projecting to a front surface of the dial. 2. The instrument device according to claim 1, wherein the halftone dimming unit is formed in a gradation such that the density decreases as the distance from the solid dimming unit increases. 3. The instrument device according to claim 1, wherein the light control unit is formed on a diffusion member provided behind the light guide member. The instrument device according to claim 4, wherein the diffusion member is arranged at a predetermined distance from the light guide member.

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