JP2005257295A - Meter illuminating structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meter illuminating structure capable of suppressing illumination uneveness and improving the flexibility of dial design, such as in the arrangement of various types of lamps, without having to increase the number of parts. <P>SOLUTION: The meter illumination structure has a reflecting member 12, which reflects illumination light of an LED 5 provided for the back side of a dial 10 to an inside surface of a reflecting chamber 13, arranged on the back side of the dial 10 and illuminates the dial 10 from its back side. An illumination reflecting recess-like wall surface part 15, for reflecting the illumination light of the LED 5 toward a part to which the illumination light of the LED 5, is made unlikely to directly reach due to the shape of a protrusion-like deformed part 8 protruded from the reflecting chamber 13 of the reflecting member 12 is formed in the part of an outer circumferential wall part 13d constituting the sidewall of the inside surface of the reflecting chamber 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a meter illumination structure for a vehicle, and more particularly to a meter illumination structure that can reduce unevenness in brightness of a dial.

  A conventional meter illumination structure as shown in FIGS. 2 and 3 is known (for example, see Patent Document 1).

  First, in terms of configuration, in such a conventional meter illumination structure, a reflecting member 4 is provided in a housing 2 of a vehicle meter 1 as a meter.

  The reflecting member 4 mainly extends along the left and right inner side wall portions 4 c and 4 c provided around the bottom surface portion 4 b having a light source hole 4 a through which the LED 5 as a light source is inserted, and the outer edge 3 a of the dial 3. The outer peripheral edge is surrounded by the outer peripheral wall 4d formed in an arc shape.

  The lower ends of the left and right inner wall portions 4c, 4c and the left and right lower ends of the outer peripheral wall portion 4d are connected by gentle curved portions 4e, 4e.

  Further, a diffusion plate 6 is provided on the back side of the dial plate 3, and the upper edge of the left and right inner wall portions 4c, 4c formed one step higher than the upper edge 4f of the outer peripheral wall portion 4d. 4g and 4g are comprised so that it may contact | abut from the back side.

  Next, the operation of this conventional meter illumination structure will be described.

  In the conventional meter illumination structure shown in FIG. 2 configured as described above, when the LEDs 5 are turned on, the inner surface of the reflection chamber formed by the bottom surface portion 4b and the outer peripheral wall portion 4d of the reflection member 4 is The illumination light from the LEDs 5 is reflected and reaches the back side of the dial 3.

And after the illumination light of said LED5 ... is spread | diffused by the diffuser plate 6 provided in the back surface side of the said dial 3, these illumination light partially permeate | transmits the inside of the said dial 3, and surface Visible as backlight illumination on the side.
Japanese Patent No. 3302605 (FIG. 1, paragraphs 0011 to 0024)

  However, in such a meter illumination structure, as shown in FIG. 3, when the convex deformation part 8 for storing the warning lamp 7 is formed in a part of the left inner wall part 4c, in this part, The space between the outer peripheral wall 4d and the inner surface becomes narrow.

  For this reason, it is difficult to further add the LED 5 between the inner side surface of the convex deformation portion 8 and the inner side surface of the outer peripheral wall portion 4d.

  In addition, the LEDs 5 and 5 positioned above and below the convex deformation portion 8 are spaced apart from the vicinity of the inner surface of the outer peripheral wall portion 4d facing the convex deformation portion 8 and other portions. Thus, the improvement of the illumination intensity by reflection of the inner side wall parts 4c and 4c cannot be expected too much.

  Accordingly, there is a possibility that the dark portion 9 is generated in the vicinity of the inner side surface of the outer peripheral wall portion 4d facing the convex deformation portion 8.

  For this reason, it is necessary to adjust the light so that illumination unevenness does not occur on the surface of the dial 3 by the diffusion plate 6 provided on the back side of the dial 3. However, it is necessary to match the illuminance of the darkest part 9, for example, the illuminance of the dark part 9 when the illumination intensity is made uniform by the dimming by the diffusion plate 6, and the illuminance of the entire backlight illumination is improved. However, there was a problem that it was difficult.

  Accordingly, an object of the present invention is to provide a meter illumination structure capable of suppressing illumination unevenness without increasing the number of parts and improving the degree of freedom of design of a dial such as arrangement of various lamps. Yes.

  In order to achieve the object, the invention of claim 1 is configured to reflect illumination light of a light source provided on the back side of the dial to an inner side surface of a reflection chamber provided on the back side of the dial. And a meter illumination structure having a reflecting member for illuminating the dial from the back side, and the illumination light of the light source is formed on a part of the side wall of the inner surface of the reflecting chamber according to the shape of the reflecting chamber of the reflecting member. However, it is characterized by a meter illumination structure in which an illumination reflection concave wall surface portion that reflects illumination light of the light source is directed toward a portion that is difficult to reach directly.

  According to the first aspect of the present invention configured as described above, the illumination light of the light source is reflected by the illumination reflection concave wall surface formed on a part of the side wall of the inner surface of the reflection chamber, and the illumination of the light source is performed. Light illuminates areas that are difficult to reach directly.

  For this reason, illumination unevenness is suppressed on the surface side of the dial.

  The illumination reflection concave wall surface portion is formed using a part of the side wall on the inner side surface of the reflection chamber. Therefore, it is not necessary to add a separate reflecting member and attach it, and a light adjusting member that adjusts illumination unevenness such as the diffuser plate can be unnecessary or simplified.

  Therefore, it is possible to suppress illumination unevenness without increasing the number of parts and to improve the degree of freedom in designing the dial, such as the arrangement of various lamps.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  The same or equivalent parts as those in the conventional example will be described with the same reference numerals.

  FIG. 1 shows a meter illumination structure according to the present embodiment.

  First, from the configuration, in the meter illumination structure of the present embodiment, in the vehicle meter 101 as a meter, the scale portion 11 is provided on the surface of the dial plate 10 by printing or the like.

  A warning lamp display portion 11b is formed at a position below the starting point 11a in the vicinity of the zero point of the scale portion 11.

  Further, the conventional diffuser plate is not provided on the back side of the dial 10 of this embodiment.

  Furthermore, in this meter illumination structure, a reflection member 12 having a reflection chamber 13 is provided on the back side of the dial 10.

  The reflection chamber 13 mainly includes left and right inner side wall portions 13c and 13c provided around a bottom surface portion 13b for fixing the LED 5 as a light source at a predetermined interval, and an outer edge 10a of the dial plate 10. Along the outer peripheral wall 13d formed in an arc shape, the outer peripheral edge is surrounded.

  And the illumination light of said LED5 ... is reflected by the inner surface of the reflective chamber 13 of the reflection member 12 arrange | positioned at the back surface side of this dial plate 10, and this dial plate 10 is illuminated from the back surface side. It is configured.

  Further, of the inner surfaces of the reflection chamber 13 facing the left and right inner wall portions 13c, 13c, a part of the left inner wall portion 13c corresponds to the warning lamp display portion 11b of the dial 10. A convex deformation portion 8 that is formed so as to protrude toward the inside of the reflection chamber 13 is integrally formed continuously.

  In the concave portion 8a located on the opposite surface side of the convex deformation portion 8, an LED 14 that is a light source of the warning lamp display portion 11b is mounted so as to be surrounded by a circular shade portion 7a. The lighting lamp display unit 11b is illuminated from the back side by lighting.

  And, due to the shape of the convex deformation part 8 of the reflection chamber 13 of the reflection member 12, the illumination light of the LEDs 5. An illumination reflection concave wall surface portion 15 that reflects the illumination light of the LED 5 below the convex deformation portion 8 is formed so as to be integrated with the outer peripheral wall portion 13d.

  The illumination reflection concave wall surface 15 has a substantially flat shape and a constant width w, so that the illumination light of the LED 5 below the convex deformation portion 8 is opposed to the convex deformation portion 8. An inner reflection surface 15a having an inclination angle θ that reflects toward the vicinity of the inner side surface of the wall portion 13d is provided.

  Next, the operation of the meter illumination structure of this embodiment will be described.

  In the meter illumination structure of this embodiment, when the LEDs 5 provided in the reflection chamber 13 of the reflecting member 12 are turned on, the illumination light of the LEDs 5 is disposed on the back side of the dial 10. The dial 10 is reflected from the inner surface of the reflection chamber 13 of the reflecting member 12 and illuminated from the back side.

  At this time, as indicated by an arrow in FIG. 1, the illumination light of the LED 5 is reflected on the inner reflection surface 15 a of the illumination reflection concave wall portion 15 formed on a part of the outer peripheral wall portion 13 d of the inner surface of the reflection chamber 13. , And the dark portion 9 shown in FIG. 3 is illuminated by the illumination light of the LEDs 5.

  For this reason, illumination unevenness is suppressed on the surface side of the dial 10.

  The illumination reflection concave wall surface 15 is continuously formed so as to be integrated with a part of the side wall of the outer peripheral wall 13d constituting the inner surface of the reflection chamber 13.

  Therefore, it is not necessary to add a separate reflecting member or the like, and a dimming member for dimming illumination unevenness such as the diffusing plate can be unnecessary or simplified.

  Therefore, illumination unevenness is suppressed without increasing the number of parts, and the degree of freedom in designing the dial 10 such as the arrangement positions of various lamps in the warning lamp display unit 11b can be improved.

  Although the best embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are possible. Are included in the present invention.

  For example, in the above-described embodiment, the conventional diffuser plate is not provided on the back side of the dial plate 10 of this embodiment. However, the present invention is not limited to this, and a diffuser plate having a simple configuration is provided. Also good. Also in this case, the illumination light from the LED 5 reaches the portion that is difficult to reach directly by the inner reflection surface 15a of the illumination reflection concave wall portion 15 and the uneven illumination is reduced. Thus, the structure can be simplified.

  Moreover, although it comprised so that LED5, 5 might be provided in a pair on the upper and lower sides of the said convex deformation | transformation part 8, not only this but a some LED5, 5 is arrange | positioned around the said convex deformation | transformation part 8 etc. In addition to the illumination light reflected on the inner side surface of the left and right inner wall portions 13c, 13c or the outer peripheral wall portion 13d, the illumination reflection concave wall surface portion 15 further increases the illuminance, and the illumination light of the light source is If it is an arrangement that illuminates a dark part that is difficult to reach directly, the light source may be, for example, a bulb other than the LED 5, and the shape, quantity, and light emitting properties of the light source are not particularly limited.

  Furthermore, in this embodiment, an illumination reflection concave wall surface 15 that reflects the illumination light of the LED 5 below the convex deformation portion 8 is continuously formed so as to be integrated with the outer peripheral wall portion 13d. However, the present invention is not limited to this. For example, an illumination reflecting concave wall surface 15 that reflects the illumination light of the LED 5 on the upper side of the convex deformation portion 8 is continuously provided so as to be integrated with the outer peripheral wall portion 13d. If the illumination reflection concave wall surface part that reflects the illumination light of the light source toward the portion where the illumination light of the light source is difficult to reach directly, the shape, quantity, and reflection characteristics are particularly It is not limited.

It is a front view of the dial of the meter which shows the meter illumination structure of the best embodiment of this invention, and demonstrates the whole structure. It is a disassembled perspective view which shows the meter illumination structure of a prior art example, and demonstrates the whole structure. It is a front view of the dial of the meter which demonstrates the whole structure with the meter illumination structure of a prior art example.

Explanation of symbols

101 Vehicle meter
5 LED (light source)
8 Convex deformation part 10 Dial 12 Reflective member 13 Reflection chamber 13d Outer peripheral wall part (side wall)
15 Illumination reflection concave wall

Claims (1)

A meter having a reflective member that illuminates the dial from the back side by reflecting the illumination light of the light source provided on the back side of the dial to the inner surface of a reflection chamber disposed on the back side of the dial A lighting structure,
Due to the shape of the reflection chamber of the reflection member, the illumination reflection that reflects the illumination light of the light source toward a portion where the illumination light of the light source is difficult to reach directly is partly formed on the side wall of the inner surface of the reflection chamber. A meter illumination structure in which a concave wall surface is formed.

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