Claims
- 1. An electronic watch, comprising:
- a base comprising a metallic main plate portion and a circuit support seat portion made of insulating material on which is mounted;
- a dynamo comprising a dynamo wheel train for transmitting external force to a dynamo rotor;
- a secondary power supply coupled to the dynamo for storing electric energy generated by said dynamo;
- a circuit section including a driving circuit coupled to the secondary power supply and constructed to be supplied with power from said secondary power supply;
- a stepping motor constructed and arranged to be driven by said driving circuit;
- a watch wheel train constructed and arranged to transmit torque from said stepping motor to a time indicating member;
- an oscillating weight constructed and arranged to transmit external force to said dynamo rotor through said dynamo wheel train, said oscillating weight comprising:
- a rotating central portion supported by said base;
- a thinner wall portion formed around said rotating central portion; and
- a thicker wall portion formed around said thinner wall portion;
- said watch wheel train and said dynamo wheel train being arranged on said base in a rotating area of said thinner wall portion; and
- said circuit section positioned such that a portion thereof is positioned at a rotating area of said thicker wall portion and is arranged in a circuit part installation hole formed in said circuit support seat, wherein said circuit section is electrically isolated from said metallic main plate.
- 2. An electronic watch according to claim 1, wherein the part of said circuit section which is arranged in said circuit part installation hole in the rotating area of said thicker wall portion is an electronic part making up said driving circuit.
- 3. An electronic watch according to claim 2, wherein a wheel train setting lever operatively connected to a setting lever is arranged on said base in the rotating area of said thinner wall portion, said wheel train setting lever stopping motion of said watch wheel train when said setting lever is operated upon via an external operation applied to an external operating member, and
- said part of said circuit section which is arranged in said circuit part installation hole in the rotating area of said thicker wall portion comprises a reset lever operatively connected to said setting lever and serving as a switch for temporarily stopping and restarting rotation of said stepping motor.
- 4. An electronic watch according to claim 2, wherein said base comprises a metallic main plate and a circuit support seat made of insulating material, and wherein said circuit part installation hole is formed in said circuit support seat.
- 5. An electronic watch according to claim 3, wherein said base comprises a metallic main plate and a circuit support seat made of insulating material, and wherein said circuit part installation hole is formed in said circuit support seat.
- 6. An electronic watch according to claim 1, wherein a screw fastening portion of an oscillating weight support for supporting said oscillating weight and said dynamo wheel train through respective bearings is disposed on said base in the rotating area of said thinner wall portion.
- 7. An electronic watch according to claim 2, wherein a screw fastening portion of an oscillating weight support for supporting said oscillating weight and said dynamo wheel train through respective bearings is disposed on said base in the rotating area of said thinner wall portion.
- 8. An electronic watch according to claim 3, wherein a screw fastening portion of an oscillating weight support for supporting said oscillating weight and said dynamo wheel train through respective bearings is disposed on said base in the rotating area of said thinner wall portion.
- 9. An electronic watch according to claim 6, wherein said oscillating weight support is entirely disposed on said base in the rotating area of said thinner wall portion.
- 10. An electronic watch according to claim 7, wherein said oscillating weight support is entirely disposed on said base in the rotating area of said thinner wall portion.
- 11. An electronic watch according to claim 8, wherein said oscillating weight support is entirely disposed on said base in the rotating area of said thinner wall portion.
- 12. An electronic watch according to claim 1, wherein said watch wheel train includes an hour wheel coupled to an hour hand; and
- said hour wheel having opposite end surfaces machined such that one end surface on a side where said hour hand is located is cut to hollow slightly in an inner peripheral portion thereof, and an other end surface opposite said side where said hour hand is located is cut to hollow slightly in an outer peripheral portion thereof.
- 13. An electronic watch according to claim 1, wherein a wall for preventing scattering of a lubricant is formed between said watch wheel train and said dynamo wheel train by a portion of a wheel train bridge supporting said watch wheel train.
- 14. An electronic watch according to claim 1, further comprising:
- a connecting portion between said dynamo stator and a dynamo magnetic core of said dynamo, said connecting portion having a sectional structure upon which is layered in a stacked arrangement, a main plate, said dynamo magnetic core and said dynamo stator; and
- respective portions of said dynamo stator and said dynamo magnetic core each jointly have upper and lower surfaces which are both positioned between upper and lower surfaces of said dynamo stator and arranged in surrounding relation to said dynamo rotor, the upper surface of said respective portions being positioned at a lower level than an upper surface of a magnet of said dynamo rotor.
Priority Claims (3)
Number |
Date |
Country |
Kind |
7-303149 |
Nov 1995 |
JPX |
|
7-303150 |
Nov 1995 |
JPX |
|
PCT/JP96/08419 |
Nov 1996 |
WOX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/817,995, filed Jul. 21, 1997, now U.S. Pat. No. 6,012,838 the contents of which are hereby incorporated by reference.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
817995 |
Jul 1997 |
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