US 6,166,999 AGranted

Clock with a mainspring wound state indicator

AssigneeSeiko Instruments Inc.

InventorsKoichiro Jujo, Katsuyoshi Takizawa, Norio Shibiya

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Abstract

To reduce a number of parts constituting a spring winding state display device and downsize a movement, a device including a first sun wheel installed with a first sun wheel gear 152 and a first sun wheel arbor 154. A second sun wheel 160 is provide with a second sun wheel gear 162 and a second sun wheel pinion 164. The second sun wheel gear 162 is in mesh with an intermediate ratchet wheel 140. A planetary reduction wheel gear 170 is in mesh with a barrel gear 126. A first planetary wheel 172 and a second planetary wheel 174 are rotatably arranged to a planetary reduction wheel gear 170 with centers of rotation thereof disposed at portions different from a center of rotation of the planetary reduction wheel gear 170. The first planetary wheel 172 rotates while revolving around the second sun wheel pinion 164. The second planetary wheel 174 rotates while revolving around the first sun wheel gear 152. A sun wheel finger 180 is attached to a third axle portion 154c such that it can slip.

Claims8

Dependent claims

A timepiece with spring winding state display having a function of displaying a winding state of a spring which constitutes a power source of a mechanical type timepiece, said timepiece with spring winding state display comprising:

a barrel complete (120) having a mainspring (122), a barrel arbor (124), a barrel gear (126) and a barrel cover (128), said barrel gear (126) being constituted to be rotatable only in one direction by rewinding of the mainspring (122);
a ratchet wheel (130) supported to rotate integrally with the barrel arbor (124) and rotatable only in one and the same direction as the direction of rotation of the barrel gear (126);
a ratchet wheel rotation regulating member (212) for regulating rotation of the ratchet wheel (130) only in one direction;
an intermediate ratchet wheel (140) installed rotatably by the rotation of the ratchet wheel (130);
a planetary reduction wheel gear (170) installed rotatably by rotation of the barrel gear (126);
a planetary wheel (176) installed rotatably to the planetary reduction wheel gear (170) with a center of rotation disposed at a portion different from a center of rotation of the planetary reduction wheel gear (170) and having a first planetary wheel (172) and a second planetary wheel (174) rotatable integrally with the planetary wheel (176);
a first sun wheel (150) installed rotatably with the center of rotation of the planetary reduction wheel gear (170) as a center of rotation, having a first sun wheel gear in mesh with the second planetary wheel (174);
a second sun wheel (160) installed rotatably with the center of rotation of the first sun wheel (150) as a center of rotation and having a second sun wheel gear (162) in mesh with the intermediate ratchet wheel (140) and a second sun wheel pinion (164) in mesh with the first planetary wheel (172);
a sun wheel finger (180) attached to the first sun wheel (150) and having one or more of feeding fingers (180c, 180d);
an intermediate power reserve wheel (182) installed intermittently rotatably by the feeding fingers (180c, 180d);
a power reserve jumper (188) for regulating a position in a rotational direction of the intermediate power reserve wheel (182);
and
a spring winding state display member (196) for displaying a spring winding state based on rotation of the intermediate power reserve wheel (182).

10 more elements

a barrel complete (120) having a mainspring (122), a barrel arbor (124), a barrel gear (126) and a barrel cover (128), the barrel gear (126) being constituted to be rotatable only in one direction by rewinding of the mainspring (122);
a ratchet wheel (130) supported to rotate integrally with the barrel arbor (124) and rotatable only in the same direction as the direction of rotation of the barrel gear (126);
a planetary gear mechanism (150, 160, 170, 176) constituted to transmit a rotational speed of the ratchet wheel (130) by changing the rotational speed based on rotation of the ratchet wheel (130);
intermittent rotation transmitting means (180) for intermittently transmitting rotation based on an output from the planetary gear mechanism (150, 160, 170, 176);
and
spring winding state displaying means (196) for displaying a winding state of the mainspring (122) by intermittently rotating in a first direction based on an output from the intermittent rotation transmitting means (180);
wherein the spring winding state displaying means (196) is constituted to rotate in a second direction opposed to the first direction by the operation of the planetary gear mechanism (150, 160, 170, 176) based on rotation of the barrel gear (126).

4 more elements

Dependencies are inferred from the claim text.