JP3810541B2 - Electronic watch with solar cell - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an electronic timepiece having a solar cell that generates power by receiving light, and more particularly to a structure of a conduction portion that connects the solar cell and a circuit device.
[0002]
[Prior art]
Considering environmental protection, the review of the use of disposable batteries has been called out in the field of watches. Meanwhile, there are many watches that use solar cells to generate light by receiving light and are driven by the generated electricity.
[0003]
Such an electronic timepiece with a solar cell needs to supply electric power generated by the solar cell to a circuit device having a charging function and a timepiece driving function. Various means for conducting from the electrode pattern of the solar cell to the circuit device are considered. In particular, when the circuit device is on the opposite side of the electrode pattern of the solar cell, there is a conduction structure described in Japanese Utility Model Publication No. 5-36282. When there is a circuit device on the opposite side of the electrode pattern for extracting power from the solar cell, as can be seen from the conductive structure described in Japanese Utility Model Publication No. 5-36282, the first conductive member that is thermocompression bonded to the electrode pattern of the solar cell There is a structure in which the second conducting member that is attached to the other circuit device is brought into conduction by contacting the first conducting member that protrudes using the cutout portion of the solar cell.
[0004]
[Problems to be solved by the invention]
However, attaching the conductive member to the solar cell by thermocompression bonding has a risk of covering the element formation surface of the solar cell that performs photovoltaic generation other than the electrode pattern unless the positional relationship between the solar cell and the conductive member is properly determined and attached. Further, two or more conducting members are required.
[0005]
An object of the present invention is a structure that simplifies the conduction between an electrode pattern and a circuit device in an electronic timepiece with a solar cell having a circuit device on the opposite side of the electrode pattern of the solar cell.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an electronic timepiece with a solar cell of the present invention operates by receiving a solar cell having an element formation surface and an electrode pattern for power extraction on the same surface side, and receiving electric power from the solar cell. And a circuit device disposed on the opposite side of the electrode pattern for extracting power, a conductive member connecting the solar cell and the circuit device, and a timepiece component disposed between the solar cell and the circuit device. In the solar cell equipped electronic timepiece, the conducting member has a spring part and a fixed part, the spring part is brought into pressure contact with the electrode pattern for power extraction of the solar cell, and the circuit device and the solar cell are conducted, The fixing portion is disposed between the timepiece constituent member and the circuit device.
[0007]
Moreover, for assembly improvement, the clock structural member, characterized in that has a guide portion for guiding to the electrode pattern of the spring portion of the conductive member from spreading to the outside of the solar cell, the guide The part is a slope part.
Furthermore, the timepiece structure member is a solar cell holding member.
Furthermore, the solar cell is held by the timepiece structure member and a spring portion provided on the conducting member.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings. 1 and 2 are plan views of an electronic timepiece with solar cell according to an embodiment of the present invention as seen from the module side, and FIG. 2 is a plan view as seen from the solar cell side. FIG. 5 is an enlarged partial view of FIG . 1 in which the portion of the conductive member, which is also a feature of the present invention, can be easily understood . Reference numeral 5 denotes a solar cell, which has four element forming surfaces 5d, and each is connected by a connecting portion 5e. Further, electrode patterns 5a and 5b for extracting electric power are respectively provided on the element forming surface 5d side. Therefore, the electrode patterns 5a and 5b are provided at both ends of the element formation surface 5d connected by the connection portion 5e.
[0009]
Reference numeral 10 denotes a motor including a coil, a stator, and a rotor, and the movement of the motor 10 drives the train wheel 11. Reference numeral 12 denotes a storage battery for storing the power generated by the solar cell 5. 1 3 is a quartz oscillator is source of timepiece drive frequency, 14 divides it, an IC for generating a driving pulse of the motor 10. The IC1 4 also controls the power distribution produced by the solar cell 5.
[0010]
Reference numeral 1 denotes a timepiece component that protects the motor 10, the train wheel 1 1 , the storage battery 12 and the like, and shapes the timepiece. Reference numerals 2, 3 function as the conduction means of the present invention and are incorporated in the timepiece component. a conductive member made of metal. There is a circuit device 4 on the conducting members 2 and 3. Since there are two electrode patterns 5a and 5b for extracting power from the solar cell 5, the conducting members 2 and 3 are members having the same shape. That is, the circuit device 4 is on the opposite side of the electrode patterns 5a and 5b.
[0011]
The detailed structure for connecting the electrode patterns 5a and 5b of the solar cell 5 of the electronic timepiece with solar cell, which is a feature of the present invention, and the circuit device 4 will be described with reference to FIG.
[0012]
FIG. 4 is an arrow view seen from BB in FIG. The conducting member 2 has a spring portion 2a that contacts the electrode pattern 5a of the solar cell 5 and a spring portion 2b that contacts the circuit device 4, and the fixed portion 2C is positioned by two positioning bosses 1a of the timepiece component 1. The fixed portion 2C is held by being sandwiched between the timepiece constituent member 1 and the circuit device 4. The initial positions of the spring portions 2a and 2b are indicated by dotted lines. Therefore, the conducting member 2 is pressed against the electrode pattern 5a of the solar cell 5 through the cutout portion 5c of the solar cell 5 by the bending force of the spring portion 2a, so that conduction can be obtained. Similarly, the spring portion 2 b of the conductive member 2 can be electrically connected to the circuit device 4, and the conductive member 2 can supply the power of the solar cell 5 to the circuit device 4.
[0013]
Next, a method for incorporating the spring portion 2a of the conductive member 2 into the electrode pattern 5a of the solar cell 5 will be described with reference to FIG.
[0014]
FIG. 3 is a cross-sectional view taken along the cross-sectional line A shown in FIG. The conductive member 2 is incorporated on the back surface of the solar cell 5. When the conducting member 2 has been incorporated in advance by the timepiece component 1, the spring part 2a of the conducting member 2 must be pushed open to the outer shape of the solar cell 5 once to reach the electrode pattern 5a of the solar cell 5. . Therefore, by forming a slope portion (guide portion of the present invention) 1 f for guiding the spring portion 2 a as shown in FIG. 3 in the timepiece component 1, the watch component 1 can easily spread to the outer shape of the solar cell 5 and easily reach the electrode pattern 5 a. The spring part 2a of the conducting member 2 can be guided.
[0015]
Description of the conductive member 3 is omitted from the same idea as the conductive member 2.
[0016]
Finally, the solar cell 5 is positioned and held by the protrusions 1c and 1d made of the timepiece component 1 and similarly held so as not to be detached by the hook portion 1e made of the timepiece component 1 and the conducting members 2 and 3. Has been.
[0017]
【The invention's effect】
As described above, the cost at the electrode pattern of the solar cell in a conductive structure for supplying power to the opposite side of the circuit device than the electrode pattern, there is no conductive member to be attached to the solar cell, it requires a metallic conductive member 1 part You can go down. In addition, it is possible to easily assemble the watch components without complicated installation methods by providing slopes for installation. Also, conductive members so connected to through the cut-out of the solar cell, it is no protruding conductive member to the outside of the module.
[Brief description of the drawings]
FIG. 1 is a plan view of a solar cell-equipped electronic timepiece on which a conductive member according to an embodiment of the present invention is mounted as viewed from the module side.
2 is a plan view of the conductive member is seen mounted electronic timepiece with solar cell from the source Raseru side embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along a cross-sectional line A shown in FIG.
4 is a view as seen from an arrow BB in FIG. 1. FIG.
5 is a partially enlarged view of the conducting member 2 shown in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Watch component 2, 3 Conductive member 4 Circuit device 5 Solar cell

Claims (8)

A solar cell having an element forming surface and an electrode pattern for power extraction on the same surface side, a circuit device that operates by receiving power from the solar cell and is disposed on the opposite side of the electrode pattern for power extraction ; In an electronic timepiece with a solar cell, comprising a conductive member for connecting a solar cell and the circuit device, and a timepiece constituent member disposed between the solar cell and the circuit device,
The conducting member has a spring part and a fixing part,
The spring part is brought into pressure contact with the electrode pattern for power extraction of the solar cell to make the circuit device and the solar cell conductive,
The solar cell-equipped electronic timepiece, wherein the fixing portion is disposed between the timepiece constituent member and the circuit device. The solar cell-attached electronic timepiece according to claim 1, wherein the conductive member is held by being sandwiched between the timepiece constituent member and the circuit device. 3. The electronic timepiece with solar cell according to claim 1, wherein the timepiece constituent member has a guide portion that guides a spring portion of the conducting member to an electrode pattern for extracting power from the solar cell. The electronic timepiece with solar cell according to claim 3, wherein the guide portion is a slope portion. The electronic timepiece with solar cell according to claim 1, wherein the timepiece constituent member is a solar cell holding member. The solar cell-attached electronic timepiece according to any one of claims 1 to 5, wherein the solar cell is held by the timepiece constituent member and a spring portion provided on the conductive member. The solar cell-attached electronic timepiece according to any one of claims 1 to 6, wherein in the conducting member, the spring portion and the fixing portion are integrated. The solar cell is provided with a notch on the outer periphery,
The said spring part press-contacts the electrode pattern for the electric power extraction of the said solar cell through the said notch part, and conducts the said solar cell and the said circuit apparatus, It is any one of the Claims 1 thru | or 7 characterized by the above-mentioned. Electronic watch with solar cell as described in 1.

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