US 2017/0314974 A1Published application

Geared motor and pointer type display device

AssigneeNidec Sankyo Corporation

InventorMasaki YOKOYAMA

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Abstract

A geared motor includes a stopper mechanism restricting the range of movement when the trailing gear rotates in a counter-clockwise direction. In the stopper mechanism, a first and a second angle ranges are obtained by dividing the range of angle of rotation of the trailing side gear by a virtual line passing through the center of rotation of the trailing side gear and the center of rotation of the driving side gear. In the first angle range in which the stopper touching part moves in a direction approaching the center of rotation of the driving side gear when the trailing side gear rotates in a counter-clockwise direction, the stopper touching part touches the part to be touched by the stopper. Thus, when the stopper mechanism is activated, the trailing side gear is subjected to a reaction force in a direction away from the driving side gear, making the meshing shallower.

Claims21

Dependent claims

A geared motor comprising:

a motor part;
an output member;
a gear train which comprises a first gear and a second gear meshed with the first gear to drive the first gear, the gear train being structured to transmit rotation of the motor part to the output member;
a support member which supports the motor part, the output member and the gear train;
and
a stopper mechanism which comprises a stopper abutting part provided in the first gear and a stopper abutted part provided in the support member, the stopper mechanism being structured so that, when the first gear is turned to one side in a circumferential direction, the stopper abutting part is abutted with the stopper abutted part to restrict a movable range of turning of the first gear to the one side;
wherein the stopper abutted part is provided at a position where the first gear is applied with a reaction force in a direction separated from the second gear when the first gear is turned to the one side and the stopper abutting part is abutted with the stopper abutted part.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/520,418Filed 16 Nov 2015
Priority: JP 2014-23710621 Nov 2014
Published: 2 Nov 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

G01D 11/18
Elements for restraining, or preventing the movement of, parts, e.g. for zeroising: springs
F16H 35/00
Gearings or mechanisms with other special functional features
F16H 35/14
Gearings or mechanisms with other special functional features: mechanisms with only two stable positions, e.g. acting at definite angular positions
F16H 35/18
Gearings or mechanisms with other special functional features: turning devices for rotatable members, e.g. shafts