JPH09264973A - Terminal lead structure for electronic watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a second connector separable from a circuit pattern by arranging a push operating part between the first connector of terminal lead and a second connector and a rotary support between the push part and the second connector, and operating the operating part. SOLUTION: A terminal lead 2 is fixed welded to the lower surface of a secondary cell 1 guided to a secondary cell support frame 5 is overhung from the outer periphery of the cell 1 via an elastic arm, and a contact 2a, a rotary support 2b and an operating part 2c are formed. The part 2b is grounded on a circuit board 3, the part 2a is grounded on the pattern 3b formed on the upper surface of the board 3 to supply power to a circuit block. An operating pin 12 is to disconnect the cell at the time of inspecting the performance of a watch. The part 2c of the lead 2 is pressed from the rear cover side of the watch in the operating direction 13 from the rear surface side of a watch, the part 2b is operated as a lever, and the part 2a is rotated in the direction separating from the board 3, i.e, reversely to the direction 13 to disconnect the conduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer display type electronic timepiece which displays time with hands. More specifically, the present invention relates to a rechargeable electronic timepiece that does not require battery replacement and that includes power generation means such as a solar cell and storage means such as a secondary battery.

[0002]

2. Description of the Related Art Conventionally, a rechargeable battery used in a rechargeable electronic timepiece having a power generation means such as a solar cell and a power storage means such as a secondary battery can be repeatedly charged and discharged, and the battery needs to be replaced. However, if a normal silver oxide battery or the like is mistakenly incorporated, there is a risk that the battery will be damaged due to overcharge and the watch will be damaged. In order to prevent this, a contact spring is welded to one pole of the secondary battery to differentiate it from a normal battery, and even if a normal battery is installed, it does not function as a watch because it cannot conduct electricity. However, if this risk prevention measure is taken, it is difficult to remove the secondary battery, and further, it is difficult to disconnect the power source when assembling the timepiece and inspecting the completed timepiece. Therefore, it is necessary to provide a measuring terminal having a pressure contact structure that can be opened and closed in a part of the timepiece circuit. As a configuration in which a measuring terminal having a pressure contact structure that can be opened and closed is provided in a part of the circuit of a timepiece, the structures found in Japanese Utility Model Laid-Open No. 53-15362 and Japanese Patent Laid-Open No. 62-223690 are known. .

Japanese Utility Model Laid-Open No. 53-15362 and Japanese Unexamined Patent Publication No.
According to the structure of JP-A-2-223690, the contact is separated by displacing the measurement terminal in the pressing direction, which is a structure with many restrictions on the structure of the timepiece. FIG. 7 is a cross-sectional view showing a conventional contact separation structure. According to FIG. 7, the contact portion 52a of the terminal lead 52 welded to one pole of the secondary battery 51 is electrically connected to the pattern portion of the circuit board 53a via the operation portion 66a of the contact member 66. The secondary battery pressing plate 54 is in contact with the other electrode of the secondary battery 51, and is electrically connected to the pattern portion of the circuit board 53a. An operation hole 54a is opened in the secondary battery pressing plate 54. The secondary battery support frame 55 on which the terminal lead 52 and the contact member 66 are mounted is provided with an opening 55a, and the working pin 62 is
By pressing in the operation direction 63, the contact portion 52a of the terminal lead 52 and the operation portion 66a of the contact member 66 are separated from each other so that conduction is interrupted, and measurement with the external power supply device 67 is possible.

On the other hand, in the market, most of the measurements at the time of watch maintenance and at the time of performance inspection of a completed watch are performed from the back cover side of the watch, that is, from the operating direction 63. The structure is not operated from the side. Therefore, in the case of a timepiece structure in which a battery is mounted on the back cover side of the circuit board 53a, the operating direction 63
Disconnecting the contacts from was a complicated task.

[0005]

The timepiece structure in which the battery is mounted on the conducting surface side of the circuit board 53a has already been adopted and commercialized in various timepieces, but at the time of performance inspection of the timepiece adopting the structure. In order to achieve the continuity disconnection of the secondary battery, there is a method of operating the terminal lead in a pulling-up direction to disconnect the continuity. However, with this method, it is difficult to use a measuring device terminal such as a commercially available tester, and there is a problem that special terminals need to be prepared at bases and retail stores around the world, and a large opening is required due to operability, so space is required. There was a problem that the configuration was inefficient. It is also conceivable to pass the terminal lead through the opening hole of the circuit board and dig it into the side surface not facing the secondary battery to establish conduction, but with this method, the secondary battery While it is easy to achieve continuity disconnection,
In order to insert the terminal lead into the opening of the circuit board,
There is a problem in that the assemblability is poor and the circuit board requires a large opening, resulting in a structure with poor space efficiency.

[0006]

The structure of the present invention for achieving the above-mentioned object is a power generation means for generating power based on external energy, a power storage means for storing the power from the power generation means, and an IC chip. And a circuit board on which a circuit pattern is formed, and a terminal lead having a first connecting portion connected to the electrode of the power storage means and a second connecting portion connected to the circuit pattern of the circuit board. In the electronic timepiece, the terminal lead is provided with a pressing operation part provided between the first connection part and the second connection part, and a rotation support formed between the pressing operation part and the second connection part. A portion is provided, and the terminal lead separates the second connection portion from the circuit pattern by operating the pressing operation portion.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a timepiece showing an embodiment of the present invention as viewed from the back cover side of the timepiece. According to FIG. 1, reference numeral 1 is a secondary battery which is a power storage means, and is welded to the back surface by a plurality of welding portion projections which are the first connecting portions of the terminal leads 2, and the whole is pressed by a secondary battery pressing plate 4 with a screw. It is fixed and fixed. The terminal lead 2 extends to the outer periphery of the secondary battery 1 via the elastic arm portion 2e, and is electrically connected to the operation portion 2c and the protruding rotation support portion 2b protruding to the back surface side, and the pattern portion 3b of the circuit board 3a. The contact portion 2a that is the second connecting portion is configured. Reference numeral 10 is a part of the motor, 11 is a part of the train wheel block, and 11a is a train wheel bridge on which the train wheel block is mounted, which is formed on the lower surface of the circuit block 3 formed on almost the entire surface of the timepiece. There is. The secondary battery 1 and the terminal lead 2 are placed on the upper surface side of the circuit block 3, the contact portion 2 a of the terminal lead 2 and the pattern portion 3 of the circuit block 3 are placed.
b contacts and achieves circuit continuity.

FIG. 2 is a partial sectional view of a timepiece showing an embodiment of the invention. The secondary battery support frame 5 is arranged on the upper surface side (the rear lid side of the timepiece) of the circuit board 3a forming the circuit block 3, and the secondary battery pressing plate 4 is used as a whole to hold down the whole. Not fixed but fixed with multiple screws.
On the lower surface of the secondary battery 1 guided by the secondary battery support frame 5, a terminal lead 2 is welded and fixed by a plurality of welding portion projections 2d. The rotation support portion 2b of the terminal lead 2 is fixed.
Is grounded to the circuit board 3a, the contact portion 2a is grounded to the pattern portion 3b formed on the upper surface of the circuit board 3a, and power is supplied to the circuit block 3. On the lower surface side (the dial side of the timepiece) of the circuit board 3a, a train wheel block 11 mounted by a watch substrate 14 and a train wheel bridge 11a is formed in the center of the watch, and the train wheel block (not shown). A motor is arranged so as to surround 11. Further, a solar cell 6 of a solar cell, which is a power generation means, and a cell terminal sheet 7 conductively bonded to the solar cell 6 are stacked under the timepiece substrate, and are fixed to the movement by a hook of a cell support frame 9. Also, the cell terminal sheet 7 and the circuit board 3
A cell conduction spring 8 for establishing electrical conduction with a is also compressed and fixed by the cell support frame 9.

FIG. 3 is a partial cross-sectional view of a secondary battery terminal lead showing an embodiment of the present invention, and FIG. 4 is a partial cross-sectional view showing the operating state thereof. Although not shown in FIG. 3, the terminal lead 2 is welded and fixed to the lower surface of the secondary battery 1 guided by the secondary battery support frame 5, and the terminal lead 2 projects to the outer peripheral portion of the secondary battery via the elastic arm portion and the contact portion. 2a, a rotation support portion 2b, and an operation portion 2c, the rotation support portion 2b is grounded to the circuit board 3a, and the contact portion 2a is a pattern portion 3b formed on the upper surface of the circuit board 3a. Is grounded to supply power to the circuit block 3. Reference numeral 12 is a work pin for conducting and disconnecting the secondary battery at the time of performance inspection of the timepiece. By pressing the operating portion 2c of the terminal lead 2 in the operating direction 13 from the back lid side of the timepiece, the rotation supporting portion 2b is actuated to the lever to move the contact portion 2a away from the circuit board 3a, that is, the operating direction 13 is reversed. It is a method of rotating the switch to the direction to disconnect the conduction. The operation at that time is achieved by twisting the elastic arms. FIG. 4 shows a state in which the power supply from the secondary battery 1 to the circuit block 3 is cut off, and the tips of the rotation support portion 2b and the operation portion 2c are in contact with the surface of the circuit board 3a. Since the portion 3b is a non-configured portion, there is no need for insulation. Further, the area of the operation hole 5a opened in the secondary battery support frame 5 for operation can be achieved as long as the work pin 12 has a sufficient margin to move straight in the operation direction 13, so that the size does not hinder space efficiency. .

FIG. 5 is a circuit configuration diagram showing an embodiment of the present invention. The electric power generated by the solar cell 6 is stored in the secondary battery 1 via the timepiece system, and the electric power of the secondary battery 1 is supplied to the timepiece load via the terminal lead 2. In the performance inspection of the timepiece, the power supply is cut off by disconnecting the terminal lead 2 and another power source is supplied by the external power supply device 15 to achieve an accurate timepiece performance inspection.

FIG. 6 is a partial cross-sectional view of a secondary battery terminal lead showing another embodiment of the present invention. This is an example in which the rotation support portion 5b is configured by another member such as the secondary battery support frame 5 instead of the rotation support portion 2b of the terminal lead 2. In the case of this configuration, the rotation support portion 2b of the terminal lead 2 is arranged on the circuit board 3a.
It has a structure in which the optimum shape of the supporting portion can be set without making contact with and the rotating operation.

[0012]

As is apparent from the above description, according to the present invention, the work pin is used for disconnecting the conduction of the secondary battery during the performance inspection of the timepiece structure in which the battery is mounted on the conduction surface side of the circuit board 53a. This can be achieved by a simple operation of pressing with only one piece, and since there is no need for a large opening in the circuit board or the secondary battery supporting member, there is an effect of achieving a space-efficient configuration. Moreover, there is an effect that the assembling property of the secondary battery can be achieved by a simple assembling method in which the secondary battery is dropped from above.

[Brief description of drawings]

FIG. 1 is a plan view of a timepiece showing an embodiment of the invention.

FIG. 2 is a partial cross-sectional view of the timepiece showing the embodiment of the invention.

FIG. 3 is a partial cross-sectional view of a secondary battery terminal lead showing an embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of a secondary battery terminal lead showing an embodiment of the present invention.

FIG. 5 is a circuit configuration diagram showing an embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of a secondary battery terminal lead showing another embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a conventional contact separation structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Terminal lead 2a Contact part 2b, 5b Rotation support part 2c Operation part 2d Welding part protrusion 2e Elastic arm part 3 Circuit block 3a Circuit board 3b Pattern part 4 Secondary battery pressing plate 5 Secondary battery support frame 5a operation hole 6 solar cell 7 cell terminal sheet 8 cell conduction spring 9 cell support frame 10 motor 11 wheel train block 11a wheel train receiver 12 work pin 13 operation direction 14 clock substrate 15 external power supply device

Claims (3)

[Claims] 1. A power generation unit that generates power based on energy from the outside, a power storage unit that stores the power from the power generation unit, a circuit board on which an IC chip is mounted, and a circuit pattern is formed, and the power storage unit. An electronic timepiece having a first connecting portion connected to the electrode of the means and a terminal lead having a second connecting portion connected to the circuit pattern of the circuit board, wherein the terminal lead has the first connecting portion and the second connecting portion. The pressing operation part provided between the connection parts, the pressing operation part and the second
A rotation support part formed between the connection parts is provided,
The terminal lead structure of an electronic timepiece, wherein the terminal lead separates the second connecting portion from the circuit pattern by operating the pressing operation portion. 2. The second connecting portion is formed so that its longitudinal direction is bent with respect to the longitudinal direction of the first connecting portion, and the pressing operation portion is on the longitudinal line of the second connecting portion and is bent. The terminal lead structure for an electronic timepiece according to claim 1, wherein the terminal lead structure is formed in a portion. 3. The terminal lead structure for an electronic timepiece according to claim 1, wherein the rotation support part is formed by projecting a part of the second connection part toward the circuit board side.