JP4479807B2 - Instrument - Google Patents

Description

  The present invention relates to an instrument suitable for use in a vehicle, for example.

  The instrument described in Japanese Patent Laid-Open No. 9-287980 has a cylindrical light guide member arranged on the outer periphery of the scale display portion of the scale board, and the light guide member extends from the scale board side toward the driver side. The tip of the part emits light.

  However, in the above-mentioned meter, the light guide member only has its tip shining for decoration and warning display, and does not contribute to the illumination of the dial, etc., so it has a uniform appearance that does not change. .

  Therefore, an object of the present invention is to provide an instrument that can provide a novel appearance with a light guide member in order to cope with such a situation.

  In order to achieve the above object, according to the first aspect of the present invention, a scale plate (10) having a scale display portion (10a) and a scale display portion (10a) having a light guide property, and the scale display. The scale plate is provided on the surface side of the scale plate (10) along the portion (10a), and the scale plate is provided on the surface side with two slopes of an inner peripheral slope portion (20c) and an outer peripheral slope portion (20d) and on the back surface side. A substantially ring-shaped light guide member (20) having a bottom surface portion (20e) located on the surface side and having a substantially triangular cross section, a pointer located on the surface of the scale plate, A light source (93) that is located on the back side and emits the pointer, a light source (92) that is located on the back side of the scale plate and makes light incident on the scale plate, and is located on the back side of the scale plate (10) The outer periphery through the bottom surface portion (20e) of the light guide member (20) While irradiating the scale display part from the surface of the scale plate through the slope part (20d), the light source (91) for causing the inner peripheral slope part (20c) to emit light, and the light guide member (20) And a light shielding member (30) disposed on the surface side of the outer peripheral slope (20d).

  Thereby, since the light guide member emits light when the light source is turned on, the decorative property is improved. Moreover, since the light of a light source is irradiated to a scale display part by a light guide member, a scale display part can be made to stand out and can be displayed. Therefore, by providing the light guide member, the light emission of the inner slope portion of the light guide member and the outstanding display of the scale display portion can be combined to provide a novel appearance. Further, the light shielding member can prevent the light source on the back side of the light guide member from being directly recognized by the driver.

  As in the invention described in claim 2, the scale plate may further form numbers inside the scale display portion (10a).

  The invention according to claim 3 is characterized in that in the invention according to claim 1 or 2, diffusion treatment is performed on the back surface (20e) side of the light guide member (20).

  As a result, light is diffusely reflected on the diffusion processing surface, the entire diffusion processing surface shines dimly, and the scale display portion is neatly illuminated, resulting in a more innovative appearance. In addition, reflection on the diffusion processing surface is prevented by the diffusion processing, and the scale on the scale display portion can be clearly seen.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(Embodiment)
1 to 3 show an embodiment of an automotive vehicle speedometer according to the present invention. FIG. 1 is a front view of the vehicle speed meter, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. It is an expanded sectional view of the B section.

  1 to 3, a scale plate 10 is made of a substantially disc-shaped transparent resin, and a scale display portion 10a in which a scale is arranged in an arc shape is printed on the surface side (driver side). As can be understood from FIG. 1, numerals are formed inside the scale display portion 10 a of the scale board 10.

  A light guide member 20 made of acrylic, for example, is installed on the surface side of the dial plate 10. The light guide member 20 is formed in a substantially ring shape having an arc-shaped portion 20a along the scale display portion 10a and a linear portion 20b on the lower end side, and the arc-shaped portion 20a covers the scale display portion 10a. Yes.

  The light guide member 20 has a substantially triangular cross section, and has two slopes on the surface side, that is, an inner circumference slope part 20c and an outer circumference slope part 20d, and a bottom face part on the back side. 20e is formed. The bottom surface portion 20 e is in close contact with the dial plate 10.

  On the surface side of the outer peripheral slope 20d of the light guide member 20, for example, a light shielding member 30 in which metallic tone plating (for example, chrome plating) is applied to ABS resin is disposed. Similar to the light guide member 20, the light shielding member 30 is formed in a substantially ring shape having an arcuate portion 30a and a linear portion 30b. The light shielding member 30 and the facing plate 40 cover the outer peripheral slope 20d of the light guide member 20.

  A diffusion plate 50 made of, for example, acrylic is closely attached to the back side of the scale plate 10, and a printed wiring board 60 is attached at a position spaced apart by a predetermined distance on the back side of the scale plate 10.

  A rotating inner unit 70 is disposed on the back side of the wiring board 60, and a light guide pointer 80 is attached to the tip of the pointer shaft 71 of the rotating inner unit 70.

  Further, on the surface side of the wiring board 60, for example, three light sources 91, 92, 93 made of light emitting diodes are arranged. Then, the light from the first light source 91 passes through the scale plate 10 and enters the light guide member 20, and the light from the second light source 92 is guided to the diffusion plate 50 and enters the scale plate 10 from its back surface, and the third The light from the light source 93 enters the pointer 80 through the through hole 10 a of the scale plate 10.

  In the present embodiment configured as described above, when the first light source 91 is turned on, the light of the first light source 91 passes through the scale plate 10 and enters the light guide member 20, and the light guide member 20 emits light. Here, since the outer peripheral slope 20d of the light guide member 20 is covered with the light shielding member 30 and the facing plate 40, the driver is in a state where the inner peripheral slope 20c of the light guide member 20 emits light. Visually check. The light shielding member 30 prevents the first light source 91 from being directly viewed by the driver.

  Further, the light incident on the light guide member 20 is reflected in the light guide member 20 and irradiated to the scale display unit 10a as indicated by an arrow C in FIG. 3, and thus the scale display unit 10a is illuminated from the surface side. Is done.

  On the other hand, when the second light source 92 is turned on, the light from the second light source 92 is guided to the diffuser plate 50 and is incident on the scale plate 10 from the back surface thereof, whereby the scale plate 10 is transmitted and illuminated. When the third light source 93 is turned on, the light from the third light source 93 is incident on the pointer 80 through the through hole 10a of the scale plate 10, and thereby the pointer 80 emits light.

  As described above, since the inner peripheral slope 20c of the light guide member 20 emits light when the first light source 91 is turned on, the decorative property is improved. In addition, since the light of the first light source 91 is irradiated to the scale display unit 10 a by the light guide member 20, in the scale panel 10, the light intensity gradually decreases from the scale display unit 10 a toward the rotation center of the pointer 80. The scale display unit 10a can be displayed in a prominent manner. Therefore, by providing the light guide member 20, the light emission of the inner peripheral slope portion 20c and the outstanding display of the scale display portion 10a can be combined to provide a novel appearance.

  Moreover, when the 2nd light source 92 is also lighted with the 1st light source 91, the scale board 10 will be transmitted and illuminated. As a result, the scale display unit 10a is illuminated from the surface side, and the entire scale plate 10 is transmitted and illuminated, which further enhances the appearance of the scale.

(Other embodiments)
In the above embodiment, the light shielding member 30 is provided in order to prevent the first light source 91 from being directly viewed by the driver. Metal tone plating (for example, chromium plating) may be applied.

  Further, by performing diffusion processing such as embossing on the bottom surface portion 20e of the light guide member 20, light is diffusely reflected on the diffusion processing surface (bottom surface portion 20e), and the entire bottom surface portion 20e shines dimly. 10a is beautifully lit and becomes even more innovative. In addition, reflection on the bottom surface portion 20e is prevented by the diffusion processing, and the scale on the scale display portion 10a can be clearly seen.

  Further, the first light source 91 and the second light source 92 may be combined. That is, the light from one light source may be incident on the light guide member 20 and the diffusion plate 50.

  In addition, when the ignition switch is turned on, for example, time difference lighting such as lighting of the third light source 93 for the pointer → lighting of the first light source 91 for the light guide member 20 → lighting of the second light source 92 for the dial 10 is performed. Can provide a novel appearance. It should be noted that the lighting order when performing the time difference lighting may be other than the order described above. Further, when the ignition switch is turned off, the time difference light may be turned off.

  In addition, by performing color printing on a portion (a portion through which light from the first light source 91 passes) located between the first light source 91 and the light guide member 20 in the scale plate 10, the inner peripheral side of the light guide member 20. The slope portion 20c can emit light with a predetermined color.

  In the above embodiment, the scale plate 10 is provided between the first light source 91 and the light guide member 20, but the scale plate 10 may not be provided between the first light source 91 and the light guide member 20. .

  Moreover, when it becomes necessary to perform some warning, the light guide member 20 can be used for warning display by causing the light guide member 20 to emit light in a red color. As the light source for the light guide member 20 in this case, for example, a red light emitting diode that is turned on at the time of warning and a light emitting diode that is turned on at a normal time are used, or a light emitting diode whose color is changed into a plurality of colors including red is used. Use.

It is a front view showing one embodiment of a meter concerning the present invention. It is AA sectional drawing of FIG. It is an expanded sectional view of the B section of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Scale board, 10a ... Scale display part, 20 ... Light guide member, 20c ... Inner circumference side slope part, 20d ... Outer circumference side slope part, 20e ... Bottom face part, 30 ... Light shielding members 91-93 ... Light source.

Claims (3)

  A scale plate (10) having a scale display portion (10a) and having a light guide property, and provided on the surface side of the scale plate (10) along the scale display portion (10a), the inner peripheral side on the surface side A substantially ring shape in which the bottom surface portion (20e) located on the surface side of the dial plate is formed on the back surface and the two slopes of the slope portion (20c) and the outer peripheral slope portion (20d), and the cross section is substantially triangular. A light guide member (20), a pointer located on the surface of the scale plate, a light source (93) located on the back side of the scale plate and emitting the pointer, and located on the back side of the scale plate, A light source (92) that causes light to enter the scale plate, and a back surface side of the scale plate (10) and the bottom surface portion (20e) of the light guide member (20) through the outer peripheral slope portion (20d). And irradiating the scale display part from the surface of the scale plate, A light source (91) that emits light from the peripheral slope portion (20c), and a light shielding member (30) disposed on the surface side of the peripheral slope portion (20d) of the light guide member (20). A characteristic instrument.   The instrument according to claim 1, wherein the scale board (10) is formed with numerals inside the scale display section (10a).   The instrument according to claim 1 or 2, wherein a diffusion treatment is performed on a back surface (20e) side of the light guide member (20).

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