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Patent Searching and Data


Title:
ELECTRONIC CLOCK
Document Type and Number:
WIPO Patent Application WO/2017/141994
Kind Code:
A1
Abstract:
The present invention comprises: a magnetized rotor(21); a stator (22) including first and second stator magnetic poles which are provided so as to be opposed to each other with the rotor (21) therebetween and a third stator magnetic pole which is provided between the first and second stator magnetic poles so as to face the rotor; a two-coil step motor (20) including a coil A which is magnetically coupled with the first stator magnetic pole and the third stator magnetic pole, and a coil B which is magnetically coupled with the second stator magnetic pole and the third stator magnetic pole; and a high-seed drive pulse generation circuit (4) that outputs, to the coil A or the coil B, a drive pulse for driving the rotor (21), wherein the rotor (21) is rotationally driven in units of 360 degrees by a drive pulse train SP10 composed of a plurality of drive pulses. Accordingly, the step motor (20) is rotationally driven in units of 360 degrees per one step, and clock hands are moved smoothly at high speed.

Inventors:
TAKYOH, Yu (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
FUKUSHIMA, Toshiaki (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
MAEDA, Toshinari (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
IRI, Daisuke (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
MATSUOH, Daisuke (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
NISHIDA, Masatoshi (1-12, Tanashicho 6-chome, Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
Application Number:
JP2017/005596
Publication Date:
August 24, 2017
Filing Date:
February 15, 2017
Export Citation:
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Assignee:
CITIZEN WATCH CO., LTD. (1-12, Tanashicho 6-chome Nishitokyo-sh, Tokyo 11, 〒1888511, JP)
International Classes:
G04C3/14; H02P8/02
Foreign References:
JP2014183683A2014-09-29
JP2006101618A2006-04-13
JP3407887B22003-05-19
JP2010043949A2010-02-25
JP3166654B22001-05-14
JP2016178742A2016-10-06
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (Rokubancho SK Bldg. 5th Floor, 3 Rokubancho, Chiyoda-k, Tokyo 85, 〒1020085, JP)
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