JPS5723881A - Train wheel construction for watch - Google Patents

Train wheel construction for watch

Info

Publication number
JPS5723881A
JPS5723881A JP9892980A JP9892980A JPS5723881A JP S5723881 A JPS5723881 A JP S5723881A JP 9892980 A JP9892980 A JP 9892980A JP 9892980 A JP9892980 A JP 9892980A JP S5723881 A JPS5723881 A JP S5723881A
Authority
JP
Japan
Prior art keywords
shaft
gear
fixed
turns
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9892980A
Other languages
Japanese (ja)
Inventor
Mitsumasa Kawamura
Masahide Hasegawa
Mitsutoshi Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP9892980A priority Critical patent/JPS5723881A/en
Publication of JPS5723881A publication Critical patent/JPS5723881A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To make small and thin sized device, by assembling train wheels of a watch into one shaft, through the use of a differential gear mechanism. CONSTITUTION:A bearing 23 of a minute hand shaft 22 is fixed to a main plate 21. A minute hand gear 24 is fixed to the shaft 22 and the shaft 22 is supported freely rotatably between the bearing 22 and an hour hand wheel 26 supported with a wheel bearing 25. The rotating movement from a step motor is delivered to a minute hand gear 24 via an intermediate wheel 27, and the rotating movement turns the shaft 22 and also the minute hand fixed to the tip. At the same time, the shaft 22 turns a planet gear 29, which turns around the shaft 22 while being turned since it is geared with a fixed gear 30. Thus, since the hour hand wheel 26 supported withe the planet gear 29 turns with the movement of the gear 29, the hour hand fixed at the tip of the hour hand wheel 29 is turned.
JP9892980A 1980-07-19 1980-07-19 Train wheel construction for watch Pending JPS5723881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9892980A JPS5723881A (en) 1980-07-19 1980-07-19 Train wheel construction for watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9892980A JPS5723881A (en) 1980-07-19 1980-07-19 Train wheel construction for watch

Publications (1)

Publication Number Publication Date
JPS5723881A true JPS5723881A (en) 1982-02-08

Family

ID=14232808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9892980A Pending JPS5723881A (en) 1980-07-19 1980-07-19 Train wheel construction for watch

Country Status (1)

Country Link
JP (1) JPS5723881A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1780612A1 (en) * 2005-10-25 2007-05-02 ETA SA Manufacture Horlogère Suisse Vorrichtung zur analogen Anzeige, die eine Planetengetriebe aufweist
JP2013210223A (en) * 2012-03-30 2013-10-10 Rhythm Watch Co Ltd Pointer drive mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5142954A (en) * 1974-10-11 1976-04-12 New Nippon Electric Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5142954A (en) * 1974-10-11 1976-04-12 New Nippon Electric Co

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1780612A1 (en) * 2005-10-25 2007-05-02 ETA SA Manufacture Horlogère Suisse Vorrichtung zur analogen Anzeige, die eine Planetengetriebe aufweist
WO2007048685A2 (en) * 2005-10-25 2007-05-03 Eta Sa Manufacture Horlogère Suisse Analog display device comprising a planetary gear drive
WO2007048685A3 (en) * 2005-10-25 2007-07-12 Eta Sa Mft Horlogere Suisse Analog display device comprising a planetary gear drive
US8477565B2 (en) 2005-10-25 2013-07-02 Eta Sa Manufacture Horlogère Suisse Analogue display device including a planetary gear device
JP2013210223A (en) * 2012-03-30 2013-10-10 Rhythm Watch Co Ltd Pointer drive mechanism

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