JPS6069589A - Portable timepiece case with solar battery - Google Patents

Abstract

PURPOSE:To reduce the cost of manufacture and improve durability and quality by dividing cover glass into two layers, i.e. a transparent substrate forming a solar battery and cover glass. CONSTITUTION:A time display is made inside of an amorphous solar battery. The cover glass 1 and glass substrate 2 are set in a plastic packing 5 while forming a gap 4, and attached to a middle 6 with the plastic packing 5 interposed so that a radial clamping margin is left before the middle 6. The formation of the gap 4 eliminates the contacting between the cover glass and glass substrate and therefore causes no damage to the both to prevent the generation of interference fringes. An upper stage (a) and a lower stage (b) are provided to the inner wall of the plastic packing to prevent the cover glass from falling from the upper stage 5a during assembly. Further, the thickness of the glass substrate is made smaller than the height of the upper stage of the plastic packing, thus forming the gap 4.

Description

DETAILED DESCRIPTION OF THE INVENTION When a transparent substrate with a solar cell is used above a time display section, the present invention provides a method in which this transparent substrate and the cover glass are combined into two sheets.
The invention relates to a solar battery-equipped portable watch that is worn with the camera.

The solar cells used in conventional watches are crystalline silicon solar cells, and several wires are embedded in the parting plate made of the plastic part of a digital watch or the scale ring made of the plastic part of an analog watch. They were connected by bonding and electrically connected to the simodyl using a conductive material to obtain a predetermined current and voltage. In addition, recently, amorphous solar cells have emerged as thin-film solar cells that can be manufactured at a lower cost than conventional crystalline silicon solar cells, requiring less manufacturing load and less raw materials, and have been attracting attention. Its feature is that it is possible to connect multiple cells in series when forming cells on a single substrate such as glass by plasma reaction of silane, making it easy to obtain the specified current and voltage necessary to drive the watch. It is.

Therefore, as shown in FIG. 7, a structure in which an amorphous solar cell is formed on the lower surface of the cover glass of a conventional watch was considered. However, with this method, if the cover glass 1 is damaged, cracked, or chipped, the solar cell must be replaced at the same time, resulting in a very large economic burden in terms of after-sales service. is. Further, although inorganic glass is often used as a cover glass, it is necessary to perform a strengthening treatment to improve the impact resistance of the glass.

When inorganic glass is strengthened, forming solar cells on the surface of the inorganic glass must be done one by one after the strengthening process, which may require the use of expensive specialized jigs and tools. This took a long time and resulted in considerable costs.

Furthermore, with a watch case that uses a water-retaining structure, it is always necessary to take into account the quality of the waterproofing, but even if there are no problems with the formation of solar cells, waterproofing defects may occur due to poor shape, cracks, or chips in the glass. As a result, they had no choice but to throw away the solar cells, which are more expensive than glass.

In order to eliminate such drawbacks, the present invention is characterized in that the cover glass is divided into two layers: the transparent glass substrate forming the solar cell and the cover glass.The purpose of this invention is to reduce the economic burden on customers in terms of after-sales service. First, we aim to reduce manufacturing costs and improve durable quality.1.
Furthermore, by printing on the inner surface of the cover glass, or by inserting a metal object such as a parting plate or a plastic plate between the cover glass and the glass substrate, the brine effect of the solar turtle pond area, which requires a large area, is enhanced. It depends on what you're trying to do.

The present invention will be described in detail below based on Examples.

FIG. 1 shows an embodiment of the present invention, in which 1 is a cover glass;
2 is a glass substrate, and 3 is an amorphous solar cell formed on the lower surface of the glass substrate 2. Time display is performed inside the amorphous solar cell 3.

The cover glass 1 and the glass substrate 2 are set in a plastic packing 5 while forming a gap 4, and then a body 6
The plastic packing 5 is interposed between the plastic packing 5 and the plastic packing 5 so as to have a tightening margin in the radial direction. By forming the gap 4, it is possible to prevent the cover glass and the glass substrate from coming into contact and causing scratches on both of them, and also to prevent the occurrence of interference fringes. In the case of Figure 1, the upper stage a is attached to the inner wall of the plastic packing.

A lower step is provided so that the cover glass does not fall below the position of the upper step 5a during assembly. Furthermore, the gap 4 is provided by making the thickness of the glass substrate thinner than the height of the upper layer of the plastic packing. Furthermore, as shown in FIG. 2, inward protrusions 5b may be provided all around or at several locations at the boundary between the cover glass and the glass substrate on the inner wall of the plastic packing. Furthermore, as shown in FIG. 6, a parting plate or sheet may be inserted between the cover glass and the glass substrate. Alternatively, as shown in FIG. 4, a protrusion 5b on the inner wall of the plastic packing may be extended to the center to serve as a partition plate or sheet as shown in FIG.

In order to enhance the design effect, patterns, marks, and hour/minute scales can be applied to the lower surface of the cover glass 1 by internal printing, water-gold printing, vapor deposition, etc.

There is still printing etc. on the parting board! It is best to insert it when you are thirsty.

On the lower surface of the glass substrate 2, in addition to the solar cells, there are formed a positive electrode and a negative electrode that conduct stain air from each cell, and a protective film to protect the solar cells.
The capacitor or secondary battery inside the coil spring 8
is used to establish continuity.

When removing the cover glass and glass substrate, open the back cover 10. as shown in Figure 5. Shell 6 with module 7 removed
Place the cover glass 1 and the plastic packing 5 on the support block 11 with the top surface 6a facing down, place the push block 12 on the inner glass substrate so that it fits inside the solar cell, and then set the jig. The glass substrate and cover glass can be removed together by gently pushing down from above using a .

In Fig. 6, only the inner area of the solar cell 3 is removed from the glass substrate 2. As a result, the time display section can be seen without using a transparent glass substrate, so a metal or plastic substrate can be used. You can also use In this case, the glass substrate 2 is not physically engaged with the body 6, but the clearance between the glass substrate 2 and the plastic packing is kept small enough to prevent play. Physical fixation takes place exclusively with a cover glass located above the glass substrate. As a result, the glass substrate is not subjected to stress from the surroundings even when it is attached, and even when it is removed, as shown in Figure 6, all you have to do is push the cover glass, so no load is directly applied to the glass substrate, and it will not damage the glass substrate. The probability of doing so is extremely low. By making the glass substrate thinner, it is possible to eliminate the problem of the time display being visible from below due to the gap between the cover glass and the glass substrate, and the total thickness of the watch case can also be slimmed down.

According to the present invention, even if the cover glass is scratched or broken, the cover glass can be replaced very easily, and the glass substrate on which the solar cells are formed, which is expensive compared to the cover glass, can be reused. Particularly in the case of solar cell watches whose selling point is longer service life, the ability to easily and inexpensively replace the cover glass influences the product value. In addition, considering the cost of forming solar cells on glass, it is necessary to strengthen the glass substrate with solar cells because it is separate from the cover glass and protected by a strengthened cover glass. There is no.

Therefore, a large number of solar cells are simultaneously formed on the surface of a large glass plate, and cut into watch glass substrates one by one in a later process.
It is easy to drop, and it is possible to use a manufacturing method that takes full advantage of the characteristics of amorphous solar cells, significantly reducing the cost of manufacturing solar cells.Also, in terms of quality, a reinforced cover glass is used. By making the cover glass and glass substrate separate, there is no need to throw away solar cells due to poor glass quality.In addition, the solar cell glass formed on a large sheet of glass When cutting off the substrate, there will be a misalignment between the outer diameter of the glass and the solar cell, but by applying various markings, scales, printing, vapor deposition, etc. on the bottom surface of the cover glass 1, the inner and outer peripheries of the solar cell can be adjusted. It can be completely corrected. Moreover, the design can be developed in a variety of ways. A similar effect can be obtained by using a parting board.

As described above, the present invention is a novel solar battery watch that is excellent in terms of after-sales service, manufacturing cost, quality, and design.

[Brief explanation of drawings]

1, 2, 6, and 4 are cross-sectional views showing embodiments of the present invention. FIG. 5 is a sectional view showing an embodiment when the engaging portion is released when using the structure of the present invention. FIG. 6 is a sectional view showing an example of application. FIG. 7 is a sectional view of a conventional example. 1. Printing or vapor deposition on the lower surface of the cover glass 1a. 2. Glass substrate 3. Amorphous solar cell 4. Gap between the cover glass and transparent substrate 5. Plastic packing 5a. Upper stage 5b provided on the inner wall of the plastic packing. Inner wall of the plastic packing. Lower stage 5c provided on the inner wall of the plastic packing 0 protrusion C 6, shell 6a shell jfIi Z modicoll a coil spring 9 To the end or sheet 10, back cover 11, receiver separator 12, pusher separator 2 Applicant: Suwa Co., Ltd. Seikosha Patent Attorney Mogami

Claims (1)

[Claims] (1) Horizontal positioning of a transparent substrate on which a thin film solar cell is formed except for the area of the time display section is performed between the cover glass located above the transparent substrate and the body. A portable watch with a solar battery, characterized in that it is made of a plastic gasket interposed so as to have a tightening margin in the radial direction. (2. Claim 1 is characterized in that an upper stage and a lower stage are provided on the inner wall of the plastic packing, and the thickness of the transparent substrate is set to be thinner than the upper stage of the plastic packing when assembled. Portable watch side with solar cell. (3) The solar cell cover according to claim 1, characterized in that an inward protrusion is formed at the boundary between the cover glass and the transparent substrate on the inner wall of the plastic packing. Portable watch side. (4) Portable watch side with a solar cell, which is characterized by inserting a spacer between the cover glass and the transparent substrate in Claim 1. (5) %W1 Claim No. Except for the area of the time display section described in 1.2 and 3.4, the substrate on which the film solar cell is formed is transparent or opaque, and the substrate is removed in the area inside the 1 m thin solar cell. A portable watch with a solar battery featuring: