JPS5815073B2 - Luminous pointer device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotatable pointer device for a watch, etc., which effectively uses light from a light source such as a lamp even when the watch etc. is placed in a dark place, and consumes less power. The purpose of the present invention is to provide a light-emitting pointer device that allows the user to check the pointer.

Conventionally, in order to make it possible to read watches even when placed in a dark place, incandescent bulbs or neon lamps were often placed near the dial and hands to illuminate the entire area.

According to this, it required a considerable amount of power consumption to make the pointer visible even from a certain distance, and in some cases fluorescent paint was applied to the pointer to make the reflection more effective. .

Additionally, in order to reduce power consumption, attempts have been made to embed a low power consumption light emitting element such as a light emitting diode into a pointer made of translucent resin to make the pointer glow; The structure that ensures electrical connection between the element and the power source is extremely complex, leading to unstable quality and high costs.

In view of the above-mentioned drawbacks, the present invention has been achieved by arranging a low power consumption light emitting element on the dial plate, guiding the amount of light from the light emitting element to the pointer without waste, and making it illuminate.

FIG. 1 is a sectional view showing an embodiment of a timepiece according to the present invention.
An hour hand pipe, a minute hand pipe 3, and a second hand shaft 4, which can rotate at a predetermined speed, are hung from the clock movement 1, and an hour hand, a minute hand 6, and a second hand 3, which is fixed to a hook 7, are press-fitted into each pipe. Fixed.

In addition, the dial plate 10 has a pipe loose fitting hole 11 approximately in the center.
1 has at least one light emitting element mounting hole 12 in the vicinity of the spherical tip 14 , a pipe hanging vertically from the clock movement 1 is inserted into the hole 11 , and at least one light emitting element 13 is inserted into the hole 12 . are inserted so that they protrude from the dial surface, and each is fixed as appropriate.

The lead wire 15 of the light emitting element 13 is connected to the power supply section 16 and is in a state where it can be lit at all times.

FIG. 2 is a perspective view of the hour hand 5 in FIG. An indicator section 20 having a rough surface 19 that diffusely reflects light is integrally formed of a transparent material, and a light emitting section fixed to the dial 10 is provided on the side surface of the dial 10 of the substrate section 17, that is, on the back surface. An annular groove 21 that overlaps the element 12 and has a substantially semicircular cross section and a radius slightly larger than the radius of the spherical tip 14, and the letters of the substrate portion 17; An annular protrusion 22 having a substantially semicircular cross section is provided.

FIG. 3 is a perspective view of the minute hand 6 in FIG. 1, which includes a disk-shaped base plate 23, a hole 24 in the center of which is press-fitted with the minute hand pipe 3, and a hole 24 extending from a part of the base plate 23 on one side. An indicator part 26 having a rough surface 25 that diffusely reflects light is integrally formed of a transparent material, and a side surface of the hour hand 5 of the base part 23, that is, a back surface thereof has a cross section that overlaps with the annular protrusion 22 of the hour hand 5. An annular groove 27 that is approximately semicircular and has a radius slightly larger than the radius of the annular protrusion 22 is provided.

According to this configuration, the light emitted from the spherical tip 14 of the light emitting element 13 is introduced into the hour hand 5 from the annular groove 21 of the hour hand 5 with almost no waste, and depending on the angle of incidence with respect to the longitudinal direction of the hour hand 5, some light is transmitted into the hour hand 5. The hour hand 5 propagates toward the tip of the indicator part 20 while being repeatedly reflected on the upper and lower surfaces of the hour hand 5, and some light is emitted from the hour hand 5 without being reflected or by being diffusely reflected on the rough surface 19 after being reflected, and the rough surface 19 is provided. It appears to glow depending on the part.

On the other hand, the light introduced into the hour hand 5 at a substantially wide angle with respect to the longitudinal direction of the hour hand 5 is transmitted by the annular protrusion 22 to the light emitting element 1 for the hour hand 5.
The minute hand 6 acts in the same manner as the annular tip 14 of
Since the light is introduced into the minute hand 6 from the annular groove 20 with almost no waste, the minute hand also appears to be shining in the same way as the hour hand 6, although the amount of light is slightly reduced.

In addition, if the dial 10 in FIG. 1 is made of a light-transmitting material, the dial can also be illuminated at the same time by utilizing the light parallel to each pointer emitted from the light emitting elements.

Further, the light emitting element is not limited to a light emitting diode, and the cross section of the annular groove of each pointer is not limited to a semicircular shape either.

In the present invention, one of the pointers, which is made up of two transparent bodies that can rotate coaxially, has an annular groove on the back surface of the substrate and an annular protrusion on the front surface, and a light emitting source is arranged opposite to the back. On the other hand, since an annular groove corresponding to the protrusion is provided on the back surface of the base plate, the light source does not interfere with the rotation of each pointer and can be used effectively even if the light intensity of the light source is quite small, resulting in a simple structure and low cost. Due to power consumption, the hands can be read even if the watch is placed in a dark place.

[Brief explanation of the drawing]

1 is a sectional view showing an embodiment of a timepiece according to the present invention, FIG. 2 is a perspective view of the timepiece in FIG. 1, and FIG. 3 is a perspective view of the minute hand in FIG. 1. 5... Clock, 6... Minute hand, 10...
...Dial board, 13...Light emitting element, 17.23
......Substrate part, 19°25...Rough surface, 2
0,26...Indicator part, 21°27...
- Annular groove, 22... annular protrusion.

Claims (1)

[Claims] 1. One of the guides, which is made up of two transparent bodies that can rotate coaxially, has an annular groove on the back surface of the substrate and an annular protrusion on the surface, and a light emitting source is arranged in the groove, and the other has an annular groove on the back surface of the substrate. A light emitting pointer device having an annular groove corresponding to the protrusion on the back surface of the part.