JPS5939661Y2 - Structure to prevent leakage of analog watches, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a light leakage prevention structure for an analog watch, etc., which prevents light from leaking around an operating shaft protruding from a transparent plate member such as a dial.

Conventionally, in various types of equipment, especially analog clocks installed in automobiles, in which a light source for internal illumination is provided on the back of a light-transmitting plate member, most clocks have an operating shaft 13 for adjusting the time, as shown in Fig. 1.
passes through a transparent hole in the transparent dial T and projects to the front.

In such a structure, since a gap is provided between the dial 7 and the operating shaft 13, light from the internal illumination light source leaks through this gap, resulting in a considerable deterioration of the product image.

In order to prevent this, some products are equipped with a light-shielding material 21 such as Moltoplane on the operating shaft on the back of the dial, but with such a wave light-preventing structure, the hole wall of the illuminated dial may be exposed. Among the light passing through the dial 7, light leaked into the gaps, causing the area around the operating shaft to be illuminated differently from other parts.

Therefore, the dial 7 was not illuminated uniformly, and the product image was also deteriorated.

In view of the above points, an object of the present invention is to propose a light leakage prevention structure for analog watches, etc., which has a simple structure and prevents light leakage around the operating shaft.

The features of this invention are that a hole through which the operation shaft passes is provided in the transparent plate member, a reading tag is formed into a chamfered hole from the back side, and a shielding member is fitted into the chamfered hole. .

Hereinafter, the present invention will be explained with reference to an embodiment of an illustrated analog timepiece.

In FIGS. 2 and 3, the case of the analog watch is composed of a front case 1 and a back case 2, and the main parts of the watch are housed inside.

In the main part of the watch, a watch mechanism 5 is held in a holding frame 3 by a plurality of rubber bushings 4, and above the watch mechanism 5 in FIG. has been done.

A dial 7, which is a transparent plate member, is sunk into the recessed portion 6a of the dial frame 6.

A window sill 8 and a front cover 9 are laminated above the dial 7 and are held by the front case 1.

An illumination light source lamp 10 is attached to the bottom of the inner surface of the holding frame 3.

The dial frame 6 and the dial I each have two through holes A.
, B are drilled, and one of the through holes A is for the pointer shaft 1 of the watch.
1, and the other through hole B has an operating shaft 13 for adjusting the time.
are penetrated respectively.

A pointer 12 is attached to the upper end of the pointer shaft 11, and a knob 14 is fixed to the tip of the operating shaft 13.

A time adjustment gear 15 is fixed to the other end of the operating shaft 13, and the lower end passes through the base plate of the clock mechanism 5 to form a circlip 16.
Extraction has been stopped.

As shown in FIGS. 3 and 4, the dial frame 6 has a bottom plate portion 6b made of a transparent synthetic resin material so that the recessed portion 6a is formed.
It is formed into a dish-shaped cross section by the surrounding bank part 6c and the flange part 6d, and is colored.

A plurality of pillars 6e are formed on the outside of the bottom surface of the dial frame 6, and a pin 6f formed at the tip of the pillar 6e is fitted into the center hole of the rubber bush 4.

The through hole B drilled in the dial frame 6 is formed into a chamfered hole having a tapered surface 6g and a large diameter back surface, as shown in FIGS. 3 and 5.

A trapezoidal shielding member 11 made of molten plane or the like is fitted into the through hole B.

The shielding member 17 has a through hole bored in the center so that the operating shaft 13
The through hole B is fitted with the washer 18 and the coil spring 19.
is pressed against the taber surface 6g.

The shielding member 11 is required to prevent light from passing through the dial frame 6 and reaching the operating shaft, so a drawn washer as shown in FIG. 6 may be used, or a through hole may be used. It may also be a deformable member that deforms to match the shape of the wire hole when pressed by the tapered surface 6g.

The dial 7 is formed of a translucent material so that the light from the lamp 10 can reach the time indicator portion 7a, and its surface allows milky white light to pass through the time indicator portion 7a, and the other portion 7b.
is printed opaquely.

By dividing the transparent plate member into the dial frame 6 and the dial plate 7 as described above, the dial plate can be easily replaced even if the dial surface is damaged due to scratches or dirt.

However, when the dial 7 is formed thick, a chamfered hole may be formed on the back surface of the dial 70 through-hole B.

When the light leakage prevention structure of the analog clock is configured as described above and the illumination light source lamp 10 is turned on, the lamp 10
The light comes from the hole drilled in the main plate of the clock mechanism 5,
The light that has passed through the dial frame 6 reaches the back surface of the dial frame 6 from the back surface of the dial T, and reaches the surface of the time indicator portion 7a through which the milky white light can pass through.
The time can be read by highlighting the time indicator portion 7a with light.

Since the shielding member 17 is closely attached to the chamfered hole wall in the gap around the operating shaft 13, light is completely prevented from leaking to the front surface of the dial.

Further, a part of the light incident on the dial frame 6 enters the surrounding bank 6C formed by the concave portion 6a, and this light indirectly illuminates the inside of the concave portion with colored light.

When the bank portion 6C is colored, there is an effect that even if a screw hole is provided in the bank portion, the screw is not visible from the outside.

Regarding this colored light, conventionally, as shown in Fig. 1, a plurality of lamps 10 were arranged vertically and horizontally symmetrically close to the dial 7, and the lamps 10 were covered with colored caps 20 made of com, resin, etc. , the use of colored caps is omitted.

When a colored cap is used, not only the indirect light, but also
The intensity of the light illuminating the time indicator will be reduced, making the lighting darker, and if there are fewer lamps, they will be closer to the dial, so there will be a difference in brightness in the time indicator part of the dial, and the heat dissipation of the lamp will be hindered, causing the lamp to become darker. This has the negative effect of shortening the lifespan of the device, requires the use of multiple lamps because the lighting becomes dim, increases the temperature inside the case and accelerates the deterioration of parts due to heat, increases cost, increases current consumption, and other disadvantages. There were drawbacks such as decreased reliability due to etc.

As described above, by coloring the bank portion 6c of the dial frame 6, the above-mentioned drawbacks were eliminated.

In addition, by adjusting the depth of coloring, it is possible to add beautiful colors to the illumination of the scale.

The entire dial frame may be colored.

In order to improve the lighting effect, a tape 2 of, for example, white color with good reflection efficiency is attached to the inner wall of the front case 1 as shown in FIG.
It is recommended to attach 2.

The lighting effect can be enhanced by attaching tape to the inner wall of the back case 2 as well.

By pasting tape on each of the interior walls, there is no need for masking, which reduces both productivity and cost, as there is no need for masking or the problem of unnecessary paint adhering to the interior walls when the interior walls are painted white, which would take time to remove. It's advantageous.

FIG. 8 shows an example in which a rib 6h is provided on the outside of the bottom surface of the dial frame 6 in order to correct uneven illumination of the time indicator portion 7a.

As described above, the illumination light source lamp 10 is placed at a distance from the dial frame 6 to reduce uneven illumination, but the clock mechanism 5 is disposed between the lamp 10 and the dial frame 6. Therefore, depending on the position of the time indicator, there will be a difference in brightness and darkness.

This difference in brightness and darkness can be corrected by the thickness of the rib 6h, resulting in uniform brightness and even subtle unevenness in light that could not be removed by adjusting the lamp position alone. It is possible to eliminate uneven illumination even when there are restrictions on position and the device is placed in a biased position.

On the back side of the time indicator portion 7a of the dial I, as shown in FIG. 9, a color with a dimming effect such as gray is printed 7 only in the bright and dark areas.
d may be performed in a pattern that matches the design of the dial.

Since the present invention is configured as described above, it is possible to completely prevent light leakage around the operating axis when conventionally using a transparent plate member, and improve the image of the product. A light leakage prevention structure for analog watches and the like with excellent practical effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of a conventional analog watch and an enlarged view of the main parts of the operating shaft, Figure 2 is a perspective view of an analog watch to which the present invention is applied, and Figure 3 is the light leakage prevention structure of the same analog watch. 4 is a perspective view of the dial plate member as above, FIG. 5 is an enlarged sectional view of essential parts of the operating shaft and shielding member as above, and FIG. 6 is an explanation of another embodiment of FIG. 5. Fig. 7 is a perspective view of the tape attached to the inner wall of the front case, Fig. 8 is a perspective view of ribs for eliminating uneven lighting provided on the outside of the bottom of the dial frame, and Fig. 9 is a perspective view of the back of the dial. It is a diagram. 1... 7-inch case, 2... back case, 3...
...Holding frame, 4...Rubber fish, 5...Clock mechanism, 6...Dial frame, 6a...Concave portion, 6b...Bottom plate portion, 6c...Bank portion, 6d...・Tsubabe, 6e...
Post, 6g... Tapered surface, 7... Dial plate, 7a.
... Time indicator part, 7b... Opaque part, 6,7...
- Transparent plate member, 8... Window frame, 9... Front cover, 10... Light source lamp for illumination, 11... Pointer shaft,
12... Pointer, 13... Operation axis for adjusting time,
14...Knob, 15...Time adjustment gear, 17...
- Shielding member, 18... Washer, 19... Spring (elastic member), A... Pointer shaft through hole, B... Through hole (chamfered hole).

Claims (1)

[Scope of utility model registration request] In an analog watch or the like in which a light source for internal illumination is provided on the back of a transparent plate member, the transparent plate member is provided with a hole through which the operating shaft passes, and the reading tag is placed on a surface where the back side of the transparent plate member has a large diameter. an elastic member formed in the handle hole and fitted into a portion of the operating shaft protruding from the back surface of the light-transmitting plate member to bias the operating shaft inward; the elastic member and the light-transmitting plate member; A structure for preventing light leakage of an analog watch, etc., comprising a shielding member provided between and fitted to the operating shaft and fitted into the chamfered hole by the pressing force of the elastic member.