JPS604142Y2 - illuminated clock - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a lighting device for a watch.

An object of the present invention is to simplify the mounting structure of a light emitting member (lamp), which is a consumable item, and to improve handling (assembly, removal, etc.).

In general, the lamp life is said to be between 20 and 4 hours when lit continuously, but the purpose of illuminated watches is to make it easier to read the time in the dark, so the lamp brightness should be as bright as possible (consumption (higher current) is required.

However, on the other hand, in order to extend battery life, it becomes necessary to reduce current consumption as much as possible.

The solution is to make the lamp as efficient as possible,
In order to increase brightness without increasing current consumption, this results in sacrificing lamp life.

Therefore, it is necessary to replace the lamp in the market.

A conventional illuminated watch has a movement 1 as shown in Figure 1.
A lead plate 3 that is thermally caulked to an electrically insulating member 2 fixed to
A lamp 4 is directly welded or soldered to the tip of the lamp.

A dial plate 6 is fixed to the movement via a dial plate holder ring 5, and a dial plate 6 is fixed to the movement plate. , 8. 9 is pushed in.

With this structure, each time the lamp was replaced, it was necessary to remove the hands and dial, and then disassemble the movement, which required a lot of man-hours.

Furthermore, since the lamp protruded from the outer periphery of the movement, it was easy to damage the lamp during disassembly and assembly.

Furthermore, in the above structure, even if only the lamp is defective, the lead plate and the insulating member, which is thermally caulked, must be replaced entirely, and the cost of replacing the lamp becomes quite high.

Further, as an example of improvement of the above structure, a system as shown in FIG. 2 has been proposed.

A lamp 4 is directly welded or soldered to the tip of a lead plate 3 which is screwed to a circuit member 2 fixed to a movement 1 and screws 10.

Also, a dial plate 6 is fixed to the movement via a dial plate holder ring 5 as in Fig. 1, and a dial plate 6 is fixed to the movement. , 8.9 are pushed in.

Although this method is somewhat improved over the method shown in FIG. 1, it still requires the removal of the hands and dial when replacing the lamp, and it has the same problems as described above.

Furthermore, the movement switching mechanism is generally placed on the dial side for ease of assembly and disassembly and to make the watch thinner.

Therefore, the switch member for lighting the lamp, which requires engagement with the switching member, is also arranged on the dial side.

However, in the structure shown in FIG. 2, since the lead plate is screwed to the circuit member on the opposite side of the dial plate, special means for establishing electrical continuity between the switch member and the lead plate is also required.

The present invention is intended to improve all of these problems, and will be described in detail below based on examples.

FIG. 3 is a sectional view showing an embodiment of the present invention.

1 is a cover glass, which is pushed into the glass edge 3 by a glass fixing ring 2.

Furthermore, the glass edge 3 is pushed into the barrel 5 via a waterproof ring 4.

On the other hand, a dial plate 8 is attached to the movement 6 via a dial plate holder ring 7.

The movement is fixed to the body 5 through the middle frame 9 by tightening the back cover 10.

Further, a lead plate 11 for establishing electrical continuity protrudes from the movement.

This lead plate functions as a spring.

Note that a light guide ring 12 having a lamp groove 12a is mounted between the dial plate 8 and the cover glass 1.

13 is a lamp, and 14 is a lamp fixing seat made of plastic.

15 is a lamp lead plate, which is thermally caulked to the lamp fixing seat.

The lead wires at both ends of the lamp are welded and fixed to the lamp lead plate 15, and the lamp, the lamp fixing seat, and the lamp lead plate are integrated into a unit.

The lamp unit has two protrusions 14a and 14b at both ends of the lamp fixing seat 14, as shown in FIGS. 4 and 5, and these protrusions are inserted into the holes of the light guide ring 12 as shown in FIGS. 6 and 8. 12b
, 12c.

There are various ways to fix this, such as screwing, but the push-in method is best in terms of ease of attachment and detachment.

The body 5 also has a notch 5a for escaping the lamp unit.

Reference numeral 16 denotes a parting plate whose back surface is completely mirror-finished, the inner diameter of which almost coincides with the upper surface of the light guide ring, and which is fixed to the edge of the glass by a cover glass.

The dial support ring also has a protrusion 7a at a position that coincides with the lamp fixing seat 14 in cross section.

This invention has the above structure, so by attaching the movement with dial and pointer, inserting the inner frame and tightening the back cover, the lead plate coming out of the movement and the lamp lead plate come into contact with each other, and the movement is fixed to the torso.

In addition, by operating a separately provided switch, the lamp is turned on, and the light emitted from the lamp uniformly illuminates the dial and pointer surfaces via the light guide ring.

The top surface of the light guide ring is covered with a partition plate, which cuts glare when the lamp is turned on and more efficiently guides the light emitted from the lamp to the dial and hands.

Further, the protrusion 7a provided on the dial support ring prevents the lamp (lamp fixing seat) from falling off from the light guiding ring in the event of an impact.

To attach or detach the lamp unit, remove the back cover and take out the inner frame, dial, and movement with pointers, and the lamp unit can be pulled out because there is a relief notch 5a in the body.

In addition, if you pull the lamp unit, the space between the light guide ring and the body will be increased.
The light guide ring also lifts up by an amount corresponding to the distance, but eventually the light guide ring hits the body 5b and cannot be lifted any further.

As described above, according to the present invention, if the lamp becomes defective, the lamp unit can be easily removed by removing the back cover and taking out the dial and movement with hands.There is no need to disassemble the movement, so it is possible to assemble the watch. Lamps can be easily replaced even by non-experts.

Additionally, the number of component parts of the lamp unit is small, and all parts except the lamp can be mass-produced by injection molding or press processing, resulting in low lamp replacement costs.

In addition, since there is no need to make any changes to the movement,
The quality of the watch can remain exactly the same as before the lamp was replaced.

Furthermore, since the lamps can be replaced easily, various illumination design effects can be easily achieved by selectively attaching lamp units with different color tones in combination with the dial.

Furthermore, when an illuminated watch is sold, a lamp with a color tone matching the consumer's preference can be installed on the spot.

In addition, since the position of the lamp unit can be changed, there is a degree of freedom in changing the size of the dial, regardless of whether the exterior design is round or deformed.You can design various designs by simply changing the position of the lamp unit alone, without changing the movement. clock becomes possible.

Although it is an independent lamp unit, electrical continuity is reliable and highly reliable.

Furthermore, as shown in FIGS. 9 and 10, by attaching a reflecting plate 17 to the lamp unit or light guide ring, the light emitted from the lamp can be guided to the dial surface more efficiently.
It is possible to further increase the lighting effect.

As mentioned above, the present invention provides a more practical illuminated clock.

[Brief Description of the Drawings] Fig. 1: A sectional view showing a conventional embodiment, Fig. 2: A sectional view showing another conventional embodiment, Fig. 3:
...Cross-sectional view showing an embodiment of the present invention, Fig. 4...
... A plan view of a lamp unit showing an embodiment of the present invention,
Fig. 5... A sectional view of a lamp unit showing an embodiment of the present invention, Fig. 6... A partial plan view of a light guide ring showing an embodiment of the present invention, Fig. 7. . . . is a partial cross-sectional view of a light guide ring showing an embodiment of the present invention, and is
-m cross-sectional view, FIG. 8...This is a partial cross-sectional view of a light guide ring showing an embodiment of the present invention, and is a partial cross-sectional view of 1-1 in FIG. n-n
Cross-sectional view, Fig. 9...Cross-sectional view showing a state in which a light guiding ring and a lamp unit are combined in another embodiment of the present invention, Fig. 10...... Other embodiments of the present invention FIG. 3 is a sectional view showing a state in which a light guide ring and a lamp unit are combined in an example. 1... Cover glass, 5... Body, 11
...Reed plate on the movement side, 12...
...Light guide ring, 12a...Lamp escape groove of light guide ring, 12b, 12c...Lamp unit fixing hole of light guide ring, 13...Lamp, 14.
...Lamp fixing seat, 14a. 14b...Protrusion for fixing the lamp unit.

Claims (1)

[Scope of utility model registration request] A light guide ring with a lamp groove on the bottom is placed near the outer periphery of the upper surface of the dial, and is held between the exterior parts and a lamp fixing seat placed near the outer periphery of the dial. A lamp lead member that firmly holds the lamp is fixed to the lamp, the lamp fixing seat and the light guide ring are fixed into one body by fitting the hole and the protrusion, and the clock movement to which the dial is combined is fixed. When inserted from the back cover side of the case, a lead member fixed to the movement and connected to the circuit is configured to elastically abut against the lamp lead member, and the lamp and the lamp fixing seat are and an illuminated timepiece, wherein a portion of the lamp lead member that contacts the lead member is located outside the outer periphery of the dial.