Electric apparatus with silent alarm
OwnerMasayuki Kawata, Nobuo Tsukadainventors
Life of this patent
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Abstract
A timepiece in which a vibration member starts vibration at an alarm time to let a person know the alarm time. The timepiece comprises a case having a shape of thin, small-sized wrist watch form, timekeeping circuit for counting a present time, alarm circuit for setting alarm time, detection circuit for detecting a coincidence a present time with the alarm time and the vibration member actuated at a set time to indicate time. The vibration member comprises a ultrasonic wave motor and an eccentric weight wheel driven by the ultrasonic motor and having its center of gravity deviated from its axis. The whole timepiece is vibrated by the unbalanced centrifugal forces produced by the turn of the weight wheel at the set time to indicate the time.
Claims11
An electronic apparatus having a timekeeping function comprising:
- a case capable of being held on the palm of a user's hand;
- timecounting means in said cases for counting a present time;
- alarm time setting means for setting an alarm time in response to a user operation;
- an ultrasonic motor in said case and having an eccentric weight for generating a vibration;
- alarm time detection means for detecting a coincidence of the present time with the alarm time set by said alarm time setting means;
- and
- driving means for driving said ultrasonic motor in accordance with said detection of the coincidence.
Dependencies are inferred from the claim text.