JPS5918378Y2 - Wristwatch with lighting device - Google Patents

Description

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

An object of the present invention is to provide a wristwatch with an illumination device that can display a clear and uniformly bright nighttime display.

Still another object is to provide a wristwatch with an illumination device that has a simple structure, is easy to handle (easy to assemble, etc.), and is compact and thin.

Conventionally, as is generally known, lighting in portable watches has been achieved by applying luminous paint, luminous paint, etc. to the hands, typefaces on the dial, and the like.

However, since the luminous paint contains radioactive components in the handsets and typefaces on the dial, managing and handling them alone poses many problems, and their use is likely to be restricted due to safety concerns. It is in.

Furthermore, the use of luminous paint increased the thickness of the typesetting on the dial and the thickness of the hands, resulting in a watch body with an unsightly appearance, with a wide gap between the dial and the glass.

It is also possible to use luminescent paint, but for small parts such as pointers and typesetting letters on the dial, the surface area is small and a sufficient amount of luminescent paint cannot be obtained.

As a result, the light emitted only for a short period of time, and was unable to fulfill its function.

Therefore, in order to realize a wristwatch with a lighting device, there has been a desire for a lighting device that can replace luminous paints and phosphorescent paints.

Various devices using lamps have been proposed so far, but all of them have a structure in which installation and handling of the lamps is troublesome, and the thickness increases depending on the lamp.

Further, the illumination effect was not sufficient, as only the light source section was extremely bright and the brightness of the display surface was uneven.

With this background in mind, the present invention provides a wristwatch with a lighting device that is simple in structure and has a high lighting effect.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are cross-sectional views showing an embodiment of a wristwatch with an illumination device according to the present invention.

1 is a case; 2 is a glass edge that fits into the case and holds the cover glass 3 through a gasket; 4 is a dial; 5, 6.
7 is a pointer indicating hours, minutes, and seconds, respectively.

8 is the abbreviation embedded on the dial, 9 is the main plate 10 of the machine body
11 is an inner frame that supports the main plate 10 from the back lid 12 side of the case 1, 13 is a lamp that is a light source, and 14 is a dial support ring that is installed between and supports the dial plate. A translucent light guiding ring is shown which is disposed on the upper surface of the dial, is located on the outer periphery of the dial, and has a space 14a in which a lamp 13 is housed.

Reference numerals 15 and 16 denote lamp lead plates, which are fixed to both lamp terminals by welding, soldering, etc., and to the light guiding ring 14 by heat caulking, etc.

That is, the light guide ring is integrally formed with a lamp and a lamp lead plate attached thereto.

17 is an insulating frame attached to the main plate 10 with a conductive member 18 on the top surface.
．． It is equipped with 19.

Conductive member 18 electrically couples to battery 20 .

Another conductive member 19 is also electrically coupled to the other end of the battery 20.

Although not shown in this drawing, a switch section is provided between the conductive member 19 and the battery 20 so that they can be connected, and the switch between the conductive member 19 and the battery 20 can be turned on or off by an operation from outside the watch. It can be turned off.

Each of the elastic conductive members 18.19 contacts and electrically couples with a lamp lead plate 15.16 mounted on the light guide ring.

With the above configuration, when the user of the watch operates the switch member in a dark place at night, it becomes conductive, the lamp 13 lights up, and the dial 4 is illuminated through the translucent light guide ring 14. The time can be read because the screen and hands are illuminated.

As described in detail, the present invention is characterized in that the lamp is mounted within the light guiding ring between the dial and the cover glass.

By incorporating a light guide ring with a lamp attached in advance, electrical continuity with the movement can be obtained, making its handling extremely easy compared to various conventional structures (structures in which the lamp and light guide member are configured separately). The lighting effect is also high.

That is, since positioning of the lamp and the light guide ring is not required, a stable lighting device can be obtained without damage to the lamp during assembly or deterioration of illumination effect due to displacement of the lamp position.

Furthermore, in the case of a conventional illumination device that includes only a conductive member, it is difficult to maintain uniform brightness on the display surface, and only the light source section is extremely bright.

As a result of experiments, it was found that by placing the lamp as close as possible to the surface of the cover glass, the light guiding effect of the cover glass cooperates, and a clearer and more uniform illumination effect can be obtained.

Even under this condition, if the lamp is attached to the light guide ring as a single unit, the lamp can be fixed at a position where it contacts the conductive ring 14b, and the lighting effect can be further enhanced.

Furthermore, since there is no wasted space between the lamp and the light guide ring, the light guide ring is thin in cross section, and the light guide ring's inner diameter (cutoff) is large in plan, making it possible to create a clean and easy-to-read exterior design.

In this embodiment, the lamp 13 is a cylindrical wire terminal lamp with leads at both ends of a cylindrical glass tube.The effect of the present invention is greater when a wire terminal type lamp is used, but other It is also possible to use a type of lamp.

Note that the appearance of the lamp during clearing is not directly visible to the user because it is covered with a light guide ring, so there is no problem with the appearance.

As explained above, if the lamp is installed and fixed in the light guiding ring between the dial and the cover glass, a lighting device with a clean design can be obtained, and an extremely good lighting effect can be obtained. can achieve the objectives of

[Brief explanation of the drawing]

FIGS. 1 and 2 are assembled sectional views showing one embodiment of the present invention.

Claims (1)

[Scope of utility model registration request] It consists of a dial, a cover glass, a light-emitting member, and a ring-shaped semitransparent light-guiding member, and the ring-shaped semi-transparent light-guiding member is provided with a recess in a part, and the light-emitting member and the light-emitting member disposed in the recess are provided with a recess. The ring-shaped translucent light guiding member is configured to be integrally coupled with a fixed template lead plate, and the ring-shaped semitransparent light guide member is placed on the dial plate with the lamp lead plate facing a notch provided in the dial plate. When the dial is mounted on the watch body, the other end of the elastic conductive member, which is fixed on the watch body and has one end connected to the battery, comes into contact with the lamp lead plate to create an electrical connection. A wristwatch with an illumination device, characterized in that it is configured to.