Illumination structure of dial plate
View Patent ↗A cylinder is formed around a pointer shaft below a dial plate. A shade is projecting from an outer wall of a cylinder. The shade prevents inner figures on the dial plate from being illuminated by direct light from a light source at a back side of the dial plate. According to this structure, the inner figures and outer figures on the dial plate are illuminated uniformly.
1. An illumination structure of a dial plate comprising:
a dial plate having inner figures arranged near a hole, and outer figures arranged at a distant part from the hole, said hole into which a pointer shaft is inserted;
a light source arranged at a back side of the dial plate below a pointer base, and supplying light simultaneously to a back surface of the dial plate and the pointer base;
a cylinder formed around the pointer shaft, and having an inner cavity having substantially the same diameter as said hole; and
a shade spaced from the dial plate and projecting from an outer wall of the cylinder a distance from the outer wall so as to prevent the inner figures from being illuminated by the direct light emitted from the light source.
2. An illumination structure of a dial plate comprising:
a dial plate having inner figures arranged near a hole, and outer figures arranged at a distant part from the hole, said hole into which a pointer shaft is inserted;
a light source arranged at a back side of the dial plate below a pointer base, and supplying light simultaneously to a back surface of the dial plate and the pointer base;
a cylinder formed around the pointer shaft, and having an inner cavity having substantially the same diameter as said hole; and
a shade spaced from the dial plate and projecting from an outer wall of the cylinder a distance from the outer wall so as to prevent the inner figures from being illuminated by the direct light emitted from the light source,
wherein said shade has a plate-like shape extending laterally from the outer wall of the cylinder.
3. An illumination structure of a dial plate comprising:
a dial plate having inner figures arranged near a hole, and outer figures arranged at a distant part from the hole, said hole into which a pointer shaft is inserted;
a light source arranged at a back side of the dial plate below a pointer base, and supplying light simultaneously to a back surface of the dial plate and the pointer base;
a cylinder formed around the pointer shaft, and having an inner cavity having substantially the same diameter as said hole; and
a shade spaced from the dial plate and projecting from an outer wall of the cylinder a distance from the outer wall so as to prevent the inner figures from being illuminated by the direct light emitted from the light source;
wherein said shade has a plate-like shape extending laterally from the outer wall of the cylinder, and being bent downward at an extreme end thereof.
4. An illumination structure of a dial plate comprising:
a dial plate having inner figures arranged near a hole, and outer figures arranged at a distant part from the hole, said hole into which a pointer shaft is inserted;
a light source arranged at a back side of the dial plate below a pointer base, and supplying light simultaneously to a back surface of the dial plate and the pointer base;
a cylinder formed around the pointer shaft, and having an inner cavity having substantially the same diameter as said hole; and
a shade spaced from the dial plate and projecting from an outer wall of the cylinder a distance from the outer wall so as to prevent the inner figures from being illuminated by the direct light emitted from the light source,
wherein said shade has a dome-like shape extending from the outer wall of the cylinder.
5. An illumination structure of a dial plate comprising:
a dial plate having inner figures arranged near a hole, and outer figures arranged at a distant part from the hole, said hole into which a pointer shaft is inserted;
a light source arranged at a back side of the dial plate below a pointer base, and supplying light simultaneously to a back surface of the dial plate and the pointer base;
a cylinder formed around the pointer shaft, and having an inner cavity having substantially the same diameter as said hole; and
a shade spaced from the dial plate and having a plate like shape projecting laterally from an outer wall of an inverted semicircular cone a distance from the outer wall of the cone so as to prevent the inner figures from being illuminated by the direct light emitted from the light source, and said cone extending from an outer wall of the cylinder at a truncated tip thereof.