Horology: time measuring systems or devices – Regulating means – For setting
Reexamination Certificate
2003-06-17
2004-08-24
Miska, Vit W. (Department: 2841)
Horology: time measuring systems or devices
Regulating means
For setting
C368S195000
Reexamination Certificate
active
06779916
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electronic timepiece having a reset lever having a bush including a bearing portion for rotatably supporting a transmission wheel.
An explanation will be given as follows of structure and operation of a conventional analog electronic timepiece disclosed in Japanese Utility Model Publication No. 45995/1993. In reference to FIG.
10
and
FIG. 11
, a movement (machine body including a drive portion)
400
of a conventional analog electronic timepiece includes a main plate
402
constituting a board of the movement
400
. A dial
404
(shown in
FIG. 11
by imaginary lines) is attached to the movement
400
. In the analog electronic timepiece, in both sides of the main plate
402
, a side thereof having the dial
404
is referred to as “back side” of the movement
400
and a side thereof opposed to the side having the dial
404
is referred to as “surface side” of the movement
400
. A train wheel integrated to “surface side” of the movement
400
is referred to as “surface train wheel” and a train wheel integrated to “back side” of the movement
400
is referred to as “back train wheel”. A winding stem
410
is integrated rotatably to a winding stem guide hole of the main plate
402
. The movement
400
is provided with a switch spring (not illustrated) for determining a position of the winding stem
410
in a direction of a central axis line
410
A. A clutch wheel
408
is arranged coaxially with the winding stem
410
. When the winding stem
410
is disposed at 0 stage, that is, in a time display state, the clutch wheel
408
is constituted not to rotate even when the winding stem
410
is rotated. When the winding stem
410
is at 1 stage, the clutch wheel
408
is constituted to rotate by rotating the winding stem
410
. On “surface side” of the movement
400
, an area on the left side of the central axis line
410
A of the winding stem
410
(first area) and an area on the right side of the central axis line
410
A of the winding stem
410
(second area) are defined.
On “surface side” of the movement
400
, there are arranged a battery
420
, a circuit block (not illustrated), a step motor
428
, a surface train wheel, a switch apparatus (not illustrated) and so on. The surface train wheel is rotated by rotating the step motor
428
. IC (not illustrated) and a crystal oscillator
422
are attached to the circuit block. The battery
420
constitutes a power source of the analog electronic timepiece. The crystal oscillator
422
constitutes an oscillation source of the analog electronic timepiece and is oscillated at, for example, 32,768 Hertz. The surface train wheel is rotatably supported by the main plate
402
and a train wheel bridge
412
. On “surface side” of the movement
400
, the battery
420
is arranged at the area (first area) on the left side of the central axis line
410
A of the winding stem
410
and the crystal oscillator
422
is arranged at the area (first area) on the left side of the central axis line
410
A of the winding stem
410
.
The step motor
428
includes a coil block
430
, a stator
432
, and a rotor
434
. The coil block
430
magnetizes the stator
432
to rotate the rotor
434
when the coil block
430
is inputted with a motor drive signal outputted by IC. The rotor
434
is constituted to rotate by, for example, 180 degrees per second. On “surface side” of the movement
400
, a wire winding portion of the coil block
430
is arranged at the area (second area) on the right side of the central axis line
410
A of the winding stem
410
and the rotor
434
is arranged at the area (second area) on the right side of the central axis line
410
A of the winding stem
410
.
A second wheel & pinion
442
is constituted to rotate via rotation of a fifth wheel & train
440
based on rotation of the rotor
434
. The second wheel & pinion
442
includes a second wheel
442
b
, a second pinion
442
c
, a second upper shaft portion
442
f
and an abacus bead portion
442
g
. The second wheel & pinion
442
is constituted to rotate by one rotation per minute. A second hand
444
is attached to the second wheel & pinion
442
. The rotational center of the second wheel & pinion
442
is arranged at the center of the main plate
402
.
A third wheel & pinion
450
is constituted to rotate based on rotation of the second wheel & train
442
. The third wheel & pinion
450
includes a third gear
450
b
, a third pinion
450
c
, a third upper shaft portion
450
f
and a third lower shaft portion
450
g
. A center wheel & pinion
452
is constituted to rotate based on rotation of the third wheel & pinion
450
. The center wheel & pinion
452
includes a center wheel
452
b
, a center pinion
452
c
and a center core
452
d
. A minute hand
464
is attached to the center wheel & pinion
452
. The center wheel & pinion
452
is constituted to rotate by one rotation per hour. The third upper shaft portion
450
f
of the third wheel & pinion
450
and the second upper shaft portion
442
f
of the second wheel & train
442
are rotatably supported by the train wheel bridge
412
. An outer peripheral portion of the center core
452
d
is rotatably supported by the main plate
402
. The abacus bead portion
442
g
of the second wheel & pinion
442
is rotatably supported by a center hole of the center core
452
.
A minute wheel
474
is constituted to rotate based on rotation of the center wheel & pinion
452
. An hour wheel
460
is constituted to rotate based on rotation of the minute wheel
474
. A center hole of the hour wheel
460
is rotatably supported by an hour wheel support portion
402
b
of the main plate
402
. The hour wheel
460
is constituted to rotate by one rotation per 12 hours. An hour hand
466
is attached to the hour wheel
460
.
A clutch plate
480
having a resetting function similar to the reset lever is rotatably arranged to a clutch plate pin
402
c
of the main plate
402
. The clutch plate
480
includes a winding stem contact elastic portion
480
a
, a rigid portion
480
b
, a spring portion
480
c
and a reset operation portion
480
f
. A third lower bearing portion
480
d
for rotatably supporting the third lower shaft portion
450
g
of the third wheel & pinion
450
, is provided at the rigid portion
480
b
. The main plate
402
is provided with a clutch plate positioning portion
402
f
for determining a position of the clutch plate
480
when the winding stem
410
is disposed at 0 stage. A reset pin
426
is attached to the main plate
402
. The reset pinion
426
is constituted to conduct to a reset terminal of IC. It is constituted that when the clutch plate
480
is brought into contact with the reset pin
426
, reset operation is carried out. On “surface side” of the movement
400
, the clutch plate
480
is arranged at the area (second area) on the right side of the central axis line
410
A of the winding stem
410
except a front end portion of the winding stem contact elastic portion
480
a.
When the winding stem
410
is disposed at 0 stage, a front end of the winding stem
410
pushes the winding stem contact elastic portion
480
a
and the reset operation portion
480
f
is brought into contact with the clutch plate positioning portion
402
f
. Under the state, the third pinion
450
c
is constituted to be brought in mesh with the center wheel
452
b
. On “surface side” of the movement
400
, the reset pin
426
, and the clutch plate positioning portion
402
f
are arranged at the area (second area) on the right side of the central axis line
410
A of the winding stem
410
.
In reference to
FIG. 12
, when the winding stem
410
is pulled to 1 stage, that is, in a time correcting state, the front end of the winding stem
410
leaves the winding stem contact elastic portion
480
a
, the clutch plate
480
is rotated by spring force of the spring portion
480
c
and the reset operation portion
480
f
is brought into contact with the reset pin
426
. Under the state, the third pinion
450
c
is not brought in mesh with the center wheel
452
b
. When the windi
Miska Vit W.
Seiko Instruments Inc.
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