JPS6042390Y2 - Clock pointer illumination device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a watch pointer illumination device that is configured to make it easier to see the pointer position of a watch in a dark place or at night.

For example, in instruments such as speedometers installed in automobiles, the pointer of the instrument is made of resin so that the light from the lamp installed in the instrument can be guided into the pointer, so that it can be used at night etc. There are devices that illuminate the pointer to improve visibility, but since the above-mentioned instruments are generally single-handed, the illumination mechanism for the pointer can be constructed relatively easily. The illumination mechanism of the pointer, which has a needle structure and constantly rotates, is structurally difficult and has rarely been implemented.

The first illuminating device for watch hands currently known to the public.
As shown in the figure, a minute hand 44 and a clock 45 are attached to the tips of a minute hand shaft 42 and a clock shaft 43 that pass through the dial 41, and a light bulb 46 is disposed inside the dial 41.
．． Through-holes 47 and 47' are provided to transmit the light from the light bulbs 46 and 46'.
There is a structure in which the front ends of the hands 45 and 44 are illuminated by illuminating the reflective surfaces 48 of the clock 45 and minute hands 44 through the radiator 45, 44, but in this structure, the reflective surfaces 48 around the minute and hour hands are As a result, the diameter of the central part of the minute hand 44 in particular becomes extremely large, which makes the watch 45 difficult to see and has disadvantages in terms of design.

The present invention was devised to eliminate such drawbacks, and specifically aims to provide a lighting device for a watch that can effectively illuminate the watch without increasing the outer diameter of the center of the watch. It is something.

More specifically, the present invention is such that an illumination bulb of the clock is provided in the time adjustment mechanism protruding from the front face of the clock, and the hour and minute hands are illuminated by the illumination method provided inside the time adjustment mechanism. This eliminates the drawbacks of the conventional technology.

The present invention will be explained in detail below based on embodiments shown in the drawings.

In FIGS. 2 and 3, reference numeral 1 denotes a dial of a watch. A cylindrical hour hand shaft 2 is held through the dial 1, and a transparent resin material is inserted into the hour hand shaft 2. A minute hand shaft 3 is loosely inserted coaxially.

At the tip of the minute hand shaft 3, a minute hand 4 made of a transparent material and formed in an edge-light manner is fitted. A reflective surface 5 is formed.

Furthermore, an edge-light type hour hand 6 made of a transparent material is fitted to the tip of the hour hand shaft 2, and a boss portion of the hour hand 6 is formed between the shaft center and the needle portion. A reflecting surface 7 and a pair of reflecting surfaces 7 and 7' extending in a wing shape from the axis are formed.

8 is a front glass of the watch, and a time adjustment mechanism 9 is rotatably held through the front glass 8.

This time adjustment mechanism 9 has a metallic hollow rotating shaft 10 that passes through the glass 8, and a socket 11 made of insulating rubber is firmly fitted into this hollow rotating shaft 10.
A light bulb 12 is fitted in the.

Reference numeral 13 denotes a knob that is fitted onto the tip of the hollow rotating shaft 10 via a collar 14 made of an insulating material, and is further fixed to the hollow rotating shaft 10 with a screw 15. A metal spring seat 16 is fixed, and one conductor 17 of the light bulb 12 is connected to this spring seat 16.

Reference numeral 18 denotes a collar fixed to the glass 8, and a spring seat 19 is fixed around the outer periphery of the collar 18, and the periphery of the spring seat 19 is spaced concentrically from the collar 18. It is pressed into contact with a conductive foil 20 attached to the front surface of the glass 8.

21 is a spring that is interposed between the spring seat 19 and the spring seat 16 and always urges the knob 13 outward; 22 is a spring that is installed on the inner peripheral surface of the rotating shaft insertion hole 23 formed in the glass 8; A contact ring 22 is fitted and is in constant electrical contact with the outer peripheral surface of the hollow rotating shaft 10, and this contact ring 22 is in electrical contact with a conductive foil 24 stuck to the back surface of the glass 8. There is.

and the other conductor 17' connected to the light bulb 12.
is in electrical contact with the inside of the rotating shaft 10.

Reference numeral 25 denotes a retaining member fixed to the pointer side end of the hollow rotary shaft 10, and this retaining member 25 has a notch 26 formed therein that can be engaged with the minute hand 4.

27 is a slit for leading out the conductor formed in the rotating shaft 10 and the collar 14, 28 is an ignition switch, and 29 is connected to the conductive foils 20 and 24 via the ignition switch 28.
This is a battery connected between the

The above is the structure of the pointer illumination device according to this embodiment.
Next, to describe its operation, one conductor 17 of the light bulb 12 is connected to the spring seat 16 → spring 21 → spring seat 19 → conductive foil 20.
→The switch 28 is connected to the battery 29 in this order, and the other conductive wire 19' is connected to the battery 29 in the order of the rotating shaft 10 → the contact ring 22 and the conductive foil 24. Therefore, when the switch 28 is closed, the light bulb 12 is lit, and part of the light from the light bulb 12 is reflected by the reflective surface 5 formed on the minute hand 4, causing the tip of the minute hand 4 to emit light.

Further, the light from the light bulb 12 passes through the boss portion of the minute hand 4, is reflected by reflective surfaces 7 and 7' formed on the hour hand 6, and is focused on the base end of the hour hand 6. The tip of the light emits light.

Therefore, since the minute hand and hour hand are illuminated by reflecting the light from the light bulb 12 housed in the time adjustment mechanism 9, there is no need to design the minute hand 4 to have a large outer diameter, and the conventional drawbacks can be overcome.

Also, the knob 13 of the time adjustment mechanism 9 is pressed against the elasticity of the spring 21, and the engagement member 25 integrated with the base of the minute hand 4 and the rotating shaft 10 is pressed.
Even when the minute hand is being engaged to correct the position of the minute hand, electricity continues to be supplied to the light bulb 12, so that the hour and minute hands can be illuminated at all times at night.

As described above, the present invention provides a timepiece in which the minute hand shaft 3 can be rotated by operating the time adjustment mechanism 9 held on the front glass 8 of the watch.
Further, the minute hand 4 and the hour hand 6 are made of a transparent material, and the outer diameter of the boss part of the hour hand 6 is made larger than the outer diameter of the boss part of the minute hand 4. A reflective surface 5 is provided on the boss portion of the hour hand 6 to receive the light from the light source 12 while avoiding the reflective surface of the minute hand 4. Since this is a watch pointer illumination device that illuminates the tip, there is no need to design a large outer diameter of the boss part of the minute hand, the shape of both hands can be balanced, and a watch with good visibility and aesthetics can be created. Can be provided.

Furthermore, according to the present invention, both the minute hand and the hour hand can be illuminated with one light source, which has the effect of simplifying the illumination mechanism.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a pointer illuminating device in a conventional watch, Fig. 2 is a sectional view showing an embodiment of the pointer illuminating device according to the present invention, and Fig. 3 shows the operating state of the correction mechanism in the device. - Fig. 4 is a sectional view taken along the line IV-IV;
FIG. 5 is a perspective view of only the hour hand. 1...Dial plate, 2...Hour hand axis, 3...
...Minute hand axis, 4...Minute hand, 5...
Reflective surface, 6...Hour hand, 7°7'...Reflective surface, 8...Front glass, 9...Time adjustment mechanism, 10... ...Hollow rotating shaft, 11...
...Socket, 12...Light bulb, 13...
・Knob, 14... Collar, 15... Screw, 16... Spring seat, 17, 17'...
・Conductor wire, 18...Color, 19...Spring seat, 20...Conductive foil, 21...Spring, 22...Contact ring , 23... Rotating shaft insertion hole, 24... Conductive foil, 25... Engaging member, 26... Notch, 27... - Slit for drawing out electric wires, 28...Ignition switch, 29...Battery.

Claims (1)

[Claims for Utility Model Registration] 1. A timepiece in which the minute hand shaft 3 can be rotated by operating a time adjustment mechanism 9 held on the front glass 8 of the timepiece, in which a light source 12 is disposed within the time adjustment mechanism 9. Further, the minute hand 4 and the hour hand 6 are made of a transparent material, and the outer diameter of the boss portion of the hour hand 6 is made larger than the outer diameter of the boss portion of the minute hand 4.
The boss part of the minute hand 4 has a reflective surface 5 that allows the light from the light source 12 to enter and illuminate the tip of the minute hand, and the boss part of the hour hand 6 has a reflective surface 5 that allows the light from the light source to enter while avoiding the reflective surface of the minute hand 4. A timepiece pointer illumination device characterized in that it has a reflective surface that illuminates the tip of the hour hand upon incident light. 2. The timepiece pointer illumination device according to claim 1, wherein the reflective surface shaped like an hour hand is shaped like a plurality of reflective surfaces 7° 7'.