JPS58115390A - Solar battery timepiece - Google Patents

Abstract

PURPOSE:To reduce a timepiece in three-dimensional size by positioning the timepiece hand fitting shaft of a timepiece movement in the center of the circumscribed circle of the timepiece movement with timepiece parts and arranging solar batteries at adequate intervals. CONSTITUTION:The timepiece hand fitting shaft 4 of the timepiece movement 1 of a solar battery timepiece is eccentric, and consequently the timepiece hand fitting shaft 4 is positioned in the center O2 of the circumscribed circle M of the timepiece movement with secondary batteries 2. In this case, the solar batteries are arranged at proper intervals at its outer circumference. Consequently, the battery fitting base 9 for the solar batteries 10 is reduced in size to reduce the timepiece in three-dimensional size on the whole.

Description

[Detailed Description of the Invention] The present invention relates to a solar battery clock applied to a wall clock, etc.
The purpose of the present invention is to provide a solar cell watch that can be made smaller and thinner.

An embodiment of the invention is shown in FIGS. 1 to 4. 1 is a circular clock movement, and 2 is a rechargeable rechargeable battery. These watch movement members) 1 and secondary batteries 2 are placed side by side in a plastic case 3.
It is contained within.

The center of the clock movement 1 is 0□ where the clock hand mounting shaft 4 is located.
The clock hand mounting shaft 4 is located at the center 02 of a circumscribed circle M between the clock movement l and the secondary battery 2. The hour is on the clock hand mounting shaft 4.

A hand 5 and a minute hand 6 are attached via a pin 7. The timepiece movement 1 includes a step motor, a circuit block for driving the step motor, and a gear train. The case 3 has a deep central recess 3a that matches the circumscribed circle M, and a shallow outer peripheral recess 3b provided on the outer periphery of the deep central recess 3a, and the watch movement l is fitted into an annular movement provided in the central recess 3a. It is fitted into the joint wall 8. Secondary battery 2Fi
It is housed within a battery fitting wall 11 provided in the case 3. An annular battery mounting board 9 is fitted into the outer periphery s3b, and twelve solar cells 10 are mounted on this battery mounting board 9 at equal intervals. The battery mounting board 9 is made of a printed circuit board. The inner circumferential hole 9a of the battery mounting board 9 is formed into a circular ring shape into which the watch moopummet 1 and the secondary battery 2 are fitted, and the inner circumferential hole 9a of the battery mounting board 9 is formed in the shape of a circular ring. Electrical components 12 are attached to the area.

The electrical component 12 is a component used in an overcharge prevention circuit that controls the amount of charge of the secondary battery 2 . A battery contact terminal 13 is attached to the battery mounting board 9 and comes into contact with the secondary battery 2. 14 is a dial plate, which is located in the central recess 3a of the case 3.
Close the lid.

FIG. 4 shows an operating circuit for driving the motor 15i within the timepiece movement 1. The solar cell 1o has an overcharge prevention circuit 12'
The secondary battery 2 is charged through. Then, the solar cell 1o and the secondary type a2 operate the output 1c16 to drive the motor 15. 31 is a resistance.

With this configuration, the entire watch can be made smaller.

In other words, since the clock hand mounting shaft 4 of the 9-clock movement 1 is eccentric so that the clock hand mounting shaft 4 is located at the center o2 of the circumscribed circle M of the hour hand movement 1 and the secondary battery 2,
Since the timepiece movement 1 and the secondary battery 2 are housed in a circular area centered on the clock hand mounting shaft 4, the diameter is reduced. Since the storage area for the timepiece movement l and the secondary battery 2 is thus reduced in size, the diameter of the battery mounting board 9 of the solar cell 10 provided on the outer periphery can be reduced.

The entire watch becomes smaller. Note that it is necessary to accommodate the timepiece movement 1 and the secondary battery 2 within a circular range centered on the timepiece hand mounting shaft 4 in order to make the dial 14 larger than the entire timepiece. In addition, the secondary battery 2 is connected to the Jll of the clock movement 1! If it is provided on the side, it will not be possible to reduce the thickness. - Since the battery mounting board 9 to which the solar cell 10 is attached is located outside the timepiece movement 1 and the secondary battery 2, the entire timepiece can be made thinner.

Note that the electrical component 12 attached to the battery mounting board 9 may be attached outside the solar cell 1o.

Since the electric component 12 is arranged inside the circumscribed circle M between the timepiece movement 1 and the secondary battery 2, there is no waste in space utilization, and further miniaturization can be achieved.

Furthermore, in the embodiment described above, the clock hand mounting shaft 4 is located at the center of the circumscribed circle M between the hour hand movement 1 and the secondary battery 2, but a component larger than the secondary battery 2 is used to drive the clock movement 1. In this case, the hour hand mounting shaft 4 is positioned at the center of the circumscribed circle between the part and the clock movement 1.

5 to 25 show other embodiments. In addition, the first
The same parts as those in *Embodiment are given the same reference numerals and explanations are omitted. This embodiment is based on the dial 1 of the watch of the first embodiment.
4 (Fig. 3) and the hour hand 5 and minute hand 6 are removed.

It is attached to the center of the main body case 18. The main case 18 includes an annular dial main body 19 and a dish-shaped rear case 20 fixed to the rear side with screws.

It consists of a disk-shaped front cover 21 fitted to the inner periphery of the dial body '19. A large number of dial pieces 19a and 19b representing the time are adhered to the front surface of the dial main body 19. The front cover 21tI'i is made of a transparent acrylic plate. The front cover 21 has an engaging protrusion 21a (Fig. 6) on the outer periphery, and the engaging protrusion 21a is inserted between the dial body 19 and the rear case 20, and the fJIJa pin screws are tightened between the two. It is fixed by doing this.

The rear case 20 is made of a transparent acrylic plate, and has a movement housing fitting hole 22 in the center, and a movement housing 17 in the movement housing fitting hole 22.
Case 3 is fitted from the inside. The case 3 has engagement notches 34 (Fig. 20, 2) provided at multiple locations on the outer circumference.
4 and 25) with the protruding pieces of the rear case, it is fixed to the rear case 20. Note that the case 3 may be fixed to the rear case 20 with screws. The rear case 20 has a hook hole 23 (FIG. 7) for wall hanging. The hour hand 5' and the minute hand 6' are attached to the clock hand mounting shaft 4 of the clock movement l via a plastic knob/z7'.

The hour hand 5' and the minute hand 6' are made of aluminum or plastic, and are provided with a long hole 5 near the top surface of the solar cell 10 to reduce the blocking of light to the solar cell 10.
a, 6a.

[Movement storage section] 7 has substantially the same structure as the timepiece of the first embodiment, but different parts and parts that were not explained in detail in the first embodiment will be explained. As shown in FIGS. 8 to 10, a transparent annular battery holding plate 24 that encloses the solar cell 1 is attached to the case 3 in a press-fit state, and a disc-shaped opaque decorative plate is attached to the inner circumference of the case 3. A plate 25 is arranged. The battery protection plate 24 is made of acrylic resin or the like. Support protrusions 10a provided on each solar cell 10 are in contact with the back surface of the battery protection plate 24, and a space is created between the support protrusion 10a and the solar cell 10. The decorative plate 25 has an engaging portion (
(not shown), and its surface is flush with the surface of the battery protection plate 24.

The decorative board 25 is, for example, an acrylic board with colored paint applied to the back side. A battery cover 26 that partially encloses the secondary battery 2 is fitted into the secondary battery storage wall 11 of the case 3. As shown in FIGS. 12 to 14, the battery cover 26 has a recess 26a on the back surface for opening and closing operations, and has a hook-shaped retaining piece 26b on the lk side that engages with the engaging protrusion of the case 3. are doing. The battery cover 26 is engaged with and disengaged from the engagement protrusion of the case 3 by turning using the recess 26a.

The battery mounting board 9 on which the solar cells 10 are attached is made of a plastic plate laminated with copper clad, and conductive parts connecting the solar cells 10 to each other and other parts are formed by etching or other methods as shown in FIG. 27 patterns have been created. The inner circumferential hole 9a of the battery mounting board 9 is formed in a potbell shape with two large and small hole portions that fit into the movement fitting wall 8 and the battery fitting wall 11 of the case 3. Inner hole 9
A positive battery contact terminal 13a for the secondary battery 2 and a negative battery contact terminal 1 are provided in the small hole part a on the back side of the battery mounting board 9.
A portion of these terminals 13a and 13b is inserted through a small hole provided in the battery mounting board 9 to the front side and soldered to the conductive portion 27.

The battery mounting board 9 has a hole 29 in which the overcharge prevention electric component 12 is mounted. This electric component 12 is a ceramic I
It consists of a C chip. The battery mounting board 9 is fixed by being screwed into four holes 30 (FIG. 18) of the case 3 or by being press-fitted to the outer peripheral wall of the case 3. In addition,
The battery protection plate 24 is fixed to the case 3 together with the battery mounting board 9 by screws screwed into the holes 3o, if necessary. In FIG. 20, reference numeral 32 denotes a movement retaining piece provided on the movement fitting wall 8 of the case 3.

When configured in this way, the clock hand mounting shaft 4 of the clock movement 1 is eccentrically positioned at the center 02 of the circumscribed circle M between the clock movement 1 and the secondary battery 2, as in the first embodiment. Therefore, the diameter of the movement storage portion 17 can be reduced. Therefore, the thick portion of the entire watch becomes smaller, and a thinner appearance can be achieved as a single watch body. In addition, a battery mounting base for mounting the solar cell 10 (a plate 9 is arranged on the outer circumferential side of the clock movement 1).
Therefore, the thickness did not increase despite the fact that the function was improved by adding the solar cell 1o.

The thinning is outstanding. Furthermore, the front cover 21 and the rear case 2
Since transparent acrylic is used for 0, it gives a clean and thin feeling. In addition, as mentioned in @, efforts have been made to make the device thinner, and transparent acrylic is used as the material for the front cover 21 and rear case 2°, making it easier to make it lighter.

As described above, in the solar cell watch of the present invention, a circular watch movement and the largest watch part for driving this watch movement are arranged side by side, and the watch hand mounting shaft of the watch movement is connected to the watch movement and the watch. It is located approximately at the center of the circumscribed circle with the component, and a plurality of solar cells are arranged at appropriate intervals along the outer periphery of the circumscribed circle.
The effect is that it can be made smaller and thinner.

[Brief explanation of drawings]

Fig. 1 is a front view of one embodiment of the present invention, Fig. 2 is a front view of its interior, Fig. 3 is an exploded perspective view thereof, Fig. 4 is a circuit diagram thereof, and Fig. 5 is another embodiment. Example front view, No. 6
The figure is a vertical side view, Figure 7 is a rear view, and Figure 8 is a rear view.
The figure is a front view of the movement housing section, Figure 9 is a sectional view taken along the line IX-IX in Figure 8, and Figure 10 is a cross-sectional view taken along the line IX-IX in Figure 8.
-The X-ray cross-sectional view and FIG. 11 are the same as 1. <A rear view of the movement housing section, Figure 12 is a front view of the battery cover, Figure 13 is a sectional view taken along the line ■-XI11 in Figure 12, and Figure 14 is a cross-sectional view of the movement housing section.
The figure is a side view of the battery cover, Figure 15 is a back view of the battery mounting board, Figure 16 is a partial front view of the battery mounting board, and Figure 17 is a copy of Figure 16. IMI
II+ cross-sectional view, Figures 18 to 20 are respectively an enlarged front view, an enlarged longitudinal sectional side view, and an enlarged back view of the case of the movement storage section, and Figure 21 is the X of Figure 18.
X[-XXI line sectional view, Figure 22 is m-xX in Figure 18
23 is a view-ml sectional view of FIG. 18, FIG. 24 is a FW line sectional view of FIG. 20, and FIG. 25 is a sectional view of
It is a sectional view taken along a short line in the figure. 1. Clock movement, 2. Secondary battery, 3. Case, 4.
Clock hand mounting shaft, 5 hour hand, 6 minute hand. 8 Movement fitting wall, 9 Battery mounting board, 10 Solar cell, 11 Battery fitting wall, 12 Electrical parts. 13 Battery contact terminal, 13a... Positive battery contact terminal. 13b Negative battery contact terminal, 14... Dial plate, 15 Tanabata, 17 - Movement storage section, 18... Body case, 19 Dial plate body, 20... Rear case, 2] - Shaved cover, 24 - Battery protection Plate Figure 1 Figure 2 12' 6 Figure 4 Figure 19 3Q3 Figure 21 1 3 Figure 22 Figure 23

Claims (1)

[Claims] A circular clock movement and the largest clock part for driving this clock movement are arranged side by side, and the clock hand mounting shaft of the clock movement is positioned approximately at the center of the circumscribed circle of the clock movement and the clock part, and the A solar cell watch with multiple solar cells arranged at appropriate intervals along the circumference of a circumscribed circle.