Driving device for a rotary member
AssigneeSeikosha Co., Ltd.
InventorsKenji Ohshima, Susumu Shinmyo, Takuo Urabe
Life of this patent
Estimating the term…
Abstract
A driving device has a stepping motor for reciprocatively rotationally driving a decorative rotary member. A memory circuit stores a data table on the basis on which the operation timing of the stepping motor is determined. A control circuit controls the application of actuation pulses to the stepping motor on the basis of the data stored in the memory circuit. The data table is made up of numeric values representative of the inter-pulse spacing of the actuation pulses, the inter-pulse spacing being selected such that the rotational speed of the rotary decorative member varies in conformity with a sine curve or the rotation angle of the decorative rotary member varies in conformity with a secant function.
Claims20
A driving device for driving a decorative rotary member provided to enhance the ornamentation of a clock, comprising:
- a decorative rotary member;
- driving means mechanically connected to the rotary member for reciprocatively rotationally driving the decorative rotary member;
- storing means for storing data including numerical values representative of inter-pulse spacing of actuation pulses effective to control rotation of the decorative rotary member;
- and controlling means for controlling the driving means by the actuation pulses dependent on the stored data, whereby the controlling means applies a driving energy to the driving means during a duration of each actuation pulse to reciprocatively rotationally drive the decorative rotary member.
A driving device for driving a decorative rotary member of a clock, comprising:
- a decorative rotary member;
- a stepping motor mechanically connected to the rotary member and rotatable in opposite directions for reciprocatively driving the decorative rotary member;
- a memory circuit for storing a data table on the basis of which an operation timing of the stepping motor is determined;
- and a control circuit for controlling the actuation of the stepping motor on the basis of the data stored in the memory circuit to reciprocatively rotationally drive the decorative rotary member.
A driving device for driving a decorative rotary member provided to enhance the ornamentation of a clock, comprising:
- a decorative rotary member;
- driving means for reciprocatively rotationally driving the decorative rotary member;
- storing means for storing data including numerical values representative of inter-pulse spacing of actuation pulses effective to control rotation of the decorative rotary member in conformity with a sine curve;
- and controlling means for controlling the driving means by the actuation pulses dependent on the stored data;
- whereby the controlling means applies a driving energy to the driving means during a duration of each actuation pulse to reciprocatively rotationally drive the decorative rotary member.
A driving device for driving a decorative rotary member provided to enhance the ornamentation of a clock, comprising:
- a decorative rotary member;
- driving means for reciprocatively rotationally driving the decorative rotary member;
- storing means for storing data including numerical values representative of inter-pulse spacing of actuation pulses effective to control rotation of the decorative rotary member in conformity with a secant function;
- controlling means for controlling the driving means by the actuation pulses dependent on the stored data;
- whereby the controlling means applies a driving energy to the driving means during a duration of each actuation pulse to reciprocatively rotationally drive the decorative rotary member.
Dependencies are inferred from the claim text.