Claims
- 1. An electronic timepiece comprising:a wheel train mounted for undergoing rotation; a transmission wheel for undergoing rotation in accordance with rotation of the wheel train; a contact point spring having a conductivity and connected to the transmission wheel for rotation therewith, the contact point spring extending substantially linearly through a rotational center of the transmission wheel; first and second detection patterns for contacting the contact point spring during rotation of the transmission wheel to generate a rotational position detecting signal corresponding to a rotational position of the transmission wheel, the first and second detection patterns being disposed at an angle of substantially 180 degree relative to the rotational center of the transmission wheel; and first and second dummy patterns for contacting the contact point spring during rotation thereof.
- 2. An electronic timepiece comprising:a wheel train mounted for undergoing rotation; a transmission wheel for undergoing forward and reverse rotation in accordance with rotation of the wheel train; a contact point spring having electric conductivity and connected to the transmission wheel for rotation therewith, the contact point spring having first, second and third contact point spring terminals extending outwardly from a rotational center of the transmission wheel; a plurality of detection patterns comprised of a first detection pattern, a second detection pattern and a VDD pattern disposed to contact the contact point spring during rotation of the transmission wheel to electrically connect the first detection pattern, the second detection pattern and the VDD pattern to one another to generate a rotational position detecting signal corresponding to a rotational position of the transmission wheel, the VDD pattern having a first pattern portion and a second pattern portion, the first pattern portion having a first end portion adjacent to and spaced-apart from the first detection pattern and a second end portion opposite the first end portion and adjacent to and spaced-apart from the second detection pattern, and the second pattern portion having a first peripheral end portion adjacent to and spaced-apart from the first detection pattern and a second peripheral end portion opposite the first peripheral end portion and adjacent to and spaced-apart from the second detection pattern; and a detecting circuit for detecting forward rotation of the transmission wheel when the first detection pattern and the VDD pattern are electrically connected together before the first detection pattern, the second detection pattern and the VDD pattern are electrically connected together, and for detecting reverse rotation of the transmission wheel when the second detection pattern and the VDD pattern are electrically connected together before the first detection pattern, the second detection pattern and the VDD pattern are electrically connected together.
- 3. An electronic timepiece according to claim 2;wherein the first detection pattern, the first pattern portion of the VDD pattern, the second detection pattern and the second pattern portion of the VDD pattern are disposed sequentially in a circumferential direction about the rotational center of the transmission wheel.
- 4. An electronic timepiece according to claim 3;wherein the first contact point spring terminal and the second contact point spring terminal are disposed at an angle of substantially 75 degrees relative to each another.
- 5. An electronic timepiece according to claim 4;wherein the first contact point spring terminal and the third contact point spring terminal are disposed at an angle of substantially 142.5 degrees relative to each another.
- 6. An electronic timepiece according to claim 5;wherein the second contact point spring terminal and the third contact point spring terminal are disposed at an angle of substantially 142.5 degrees relative to each another.
- 7. An electronic timepiece according to claim 6;wherein the first detection pattern is disposed within an angle of substantially 30 degrees relative to the rotational center of the transmission wheel.
- 8. An electronic timepiece according to claim 7;wherein the second detection pattern is disposed within an angle of substantially 30 degrees relative to the rotational center of the transmission wheel.
- 9. An electronic timepiece according to claim 8;wherein the first pattern portion of the VDD is disposed within an angle of substantially 60 degrees relative to the rotational center of the transmission wheel.
- 10. An electronic timepiece according to claim 9;wherein the second pattern portion of the VDD is disposed within an angle of substantially 240 degrees relative to the rotational center of the transmission wheel.
- 11. An electronic timepiece comprising:a transmission wheel mounted for undergoing rotation; a contact point spring for undergoing rotation in accordance with rotation of the transmission wheel, the contact point spring having a first contact point portion and second contact point portion; and a contact point pattern having a reference potential pattern and a contact point switch pattern disposed to contact the first and second contact point patterns; wherein when the transmission wheel rotates, a rotational signal corresponding to rotation of the transmission wheel is not outputted in a state in which both of the first contact point portion and the second contact point portion contact the reference potential pattern, the rotational signal is outputted in a state in which the first contact point portion contacts the reference potential pattern and the second contact point portion contacts the contact point switch pattern, the rotational signal is outputted in a state in which the first contact point portion contacts the contact point switch pattern and the second contact point portion contacts the reference potential pattern, and the rotational signal is not outputted in a state in which neither of the first contact point portion and the second contact point portion is not brought into contact with the contact point switch pattern.
- 12. An electronic timepiece according to claim 11;wherein the first contact point portion extends in a first direction and the second contact point portion extends in a second direction different from the first direction.
- 13. An electronic timepiece comprising:a transmission wheel mounted for undergoing forward and reverse rotation about a rotational center; a contact point spring connected to the transmission wheel for rotation therewith; a plurality of detection patterns comprised of a first detection pattern, a second detection pattern and a VDD pattern disposed to contact the contact point spring during rotation of the transmission wheel to connect the first detection pattern, the second detection pattern and the VDD pattern with one another to generate a rotational position detecting signal corresponding to a rotational position of the transmission wheel, the VDD pattern having a first pattern portion and a second pattern portion, the first pattern portion having a first end portion adjacent to and spaced-apart from the first detection pattern and a second end portion opposite the first end portion and adjacent to and spaced-apart from the second detection pattern, and the second pattern portion having a first peripheral end portion adjacent to and spaced-apart from the first detection pattern and a second peripheral end portion opposite the first peripheral end portion and adjacent to and spaced-apart from the second detection pattern; and a detecting circuit for detecting forward rotation of the transmission wheel when the first detection pattern is connected to the VDD pattern before the first detection pattern, the second detection pattern and the VDD pattern are connected to one another, and for detecting reverse rotation of the transmission wheel when the second detection pattern is connected with the VDD pattern before the first detection pattern, the second detection pattern and the VDD pattern are connected with one another.
Priority Claims (4)
Number |
Date |
Country |
Kind |
9-109446 |
Apr 1997 |
JP |
|
9-109455 |
Apr 1997 |
JP |
|
10-016701 |
Jan 1998 |
JP |
|
10-086710 |
Mar 1998 |
JP |
|
Parent Case Info
This is a Continuation-in-part of application Ser. No. 09/065,987, filed Apr. 24, 1998, now U.S. Pat. No. 6,088,302.
US Referenced Citations (16)
Foreign Referenced Citations (2)
Number |
Date |
Country |
60224085 |
Nov 1985 |
JP |
60224086 |
Nov 1985 |
JP |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/065987 |
Apr 1998 |
US |
Child |
09/583135 |
|
US |