JPS5828230Y2 - mobile clock lighting device - Google Patents

Description

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

The main purpose of the present invention is to obtain a lighting device with a simple structure, high efficiency, and excellent design.

In order to read the time in dark places such as at night, conventional mobile watches use self-luminous luminous paint made from radioactive isotopes such as tritium and glomesium to be applied to the time display hands and dial, and utilize the luminescence. It was customary.

However, since the above-mentioned luminous paint contains radioactive isotopes, there are restrictions on its handling, and it cannot be used indefinitely. The aim is to efficiently illuminate the needle with a simple structure, and will be explained below using examples.

FIG. 1 is a diagram showing an embodiment of the present invention, in which 1 is a light emitting body;
2 is a member made of a light-guiding substance provided around the dial, which also serves as a dial support member (hereinafter referred to as the dial support member).
, 3 is a glass frame, and 4 is a dial.

The dial support member 2 is made of a transparent or translucent light-guiding material (for example, methacrylic resin), and 2a is one surface on which a reflective film is formed, and 2b is a notch for taking in light. It forms the surface part.

The reflective film can be formed by vapor depositing a metal such as aluminum, adhering a light reflective material such as a metal, plating, printing, spraying, or the like.

The light emitted from the light emitter 1 is reflected by the surface 2a of the dial support member 2 and the surface 3a of the glass frame 3, and is reflected by the surface 4a (hereinafter referred to as the surface) of the dial 4 on the time display member (not shown) side. ).

At the same time, illumination of the time display member is also possible.

Arrows a, b, c, d, and e in the figure represent the paths of light.

4b is the back side of the dial 4, and is the side on which the light emitter 1 is placed.

It is possible to provide a reflective film other than 2a on the dial support member 2 for reasons such as manufacturing reasons, as long as the reflective film does not obstruct the light path indicated by the arrow.

In this invention, as mentioned above, the luminous body is installed on the opposite side of the dial from the time display member, and further inside the outer periphery of the dial, so that the design of the watch is not spoiled, and the luminous body This has the advantage that it can be easily attached to the watch mechanical body and connected to an electric circuit.

A member made of light-guiding material is installed around the dial,
Since the light is guided onto the surface of the dial, it is possible to efficiently illuminate the dial with a simple structure, and there is no need to take any measures to guide the dial. Since it is possible to use a conventional dial plate without any restrictions on external design.

As in the embodiment, the member made of the light-guiding substance also serves as a dial support member, so that the structure can be simplified without increasing the number of parts.

Furthermore, since the light-guiding member is provided with a reflective surface, the path of light can be extremely easily guided to the desired direction, thereby increasing illumination efficiency.

FIG. 2 shows another embodiment of the present invention, in which the dial support member 2 has at least two reflective surfaces 2a and 2b, and the light emitted from the light emitter 1 is directed in the direction of arrow a.

b, c) Illuminate the surface 4a of the dial 4 using d, e, f, and g as paths.

According to this embodiment, it is possible to reduce gaps around the outer periphery of the dial plate and improve appearance.

In addition to the above embodiments, there is also a dial and hour hand.

It is also possible to apply a luminous paint that does not contain radioactive isotopes to a part of the time display member such as the minute hand in advance, and make it emit light when it receives the light from the luminous body, thereby illuminating the dial and time display member. It is.

As described above, the present invention provides a highly practical lighting device that has a simple structure, is efficient, has an excellent design, and is highly practical.

More specifically, it has the following effects.

a) In the configuration of the present application, the light guide (dial plate receiver ring) for guiding the light from the light emitter on the back side of the dial has a reflective surface on the back side of the dial, and a part of the reflective surface is placed outside the dial. By placing it outside the periphery, the light is guided to the front side of the dial, making it possible to place the light emitting body inside the outside periphery of the dial.

When the light-emitting body is completely inside the outer periphery of the dial, it cannot be directly seen from the outside, so a well-balanced lighting effect can be obtained by eliminating the extremely bright areas. The radial dimension of the light guide (dial holder ring) located outside the periphery can be set independently of the light emitting body, so we can provide an illuminated portable watch with a small radial dimension and a clean design as needed. can.

b) Since the light-emitting body is placed on the back side of the dial and further inside than the outer periphery, the light-emitting body and the moufment circuit can be easily connected, and a watch with a lighting device that can be easily installed can be provided.

c) The glass frame that connects to the watch case is placed so as to cover the part of the dial holder ring that is placed outside the dial, making it difficult to see the light emitting element directly, resulting in an excellent design. We can provide lighting equipment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention. FIG. 2 is a sectional view showing a second embodiment of the present invention. 1... Luminous body, 2... Light guiding member, 4
・・・・・・Dial board.

Claims (1)

[Scope of utility model registration request] In a mobile watch that has a light emitting body such as a light bulb, a dial, a time display member such as a clock/minute hand on the front side of the dial, and a glass frame that is connected to the watch case, the light emitting body is attached to the dial. On the other hand, it is arranged on the back side of the dial, which is the opposite side from the time display member, and further inside the outer periphery of the dial, and in the vicinity of the luminous body, there is a dial made of a light-guiding material. A receiver ring is arranged and the dial receiver ring has a light entrance surface portion adjacent to the light emitting body;
a reflective surface portion for guiding light to the front surface side of the dial plate on the back side of the dial plate, and at least a part of the reflective surface portion is arranged outside the outer periphery of the dial plate; Moreover, the lighting device for a portable watch is characterized in that the glass frame is arranged to overlap in a plane so as to cover a portion of the dial receiver ring arranged on the outer periphery of the dial.