(19)
(11) EP 2 085 834 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.03.2011 Bulletin 2011/09

(43) Date of publication A2:
05.08.2009 Bulletin 2009/32

(21) Application number: 09151207.9

(22) Date of filing: 23.01.2009
(51) International Patent Classification (IPC): 
G04F 7/08(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 29.01.2008 JP 2008017931

(71) Applicant: Seiko Instruments Inc.
Chiba-shi, Chiba (JP)

(72) Inventor:
  • TOKORO, Takeshi
    Chiba-shi, Chiba (JP)

(74) Representative: Cloughley, Peter Andrew 
Miller Sturt Kenyon 9 John Street
London WC2N 2ES
London WC2N 2ES (GB)

   


(54) Timepiece movement main body and chronograph function attached thereto


(57) A timepiece movement main body (6) constituting a base unit (2) of a chronograph function attached timepiece (1) includes a barrel complete (20), a center wheel and pinion (24A) rotated in accordance with rotation of the barrel complete, a third wheel and pinion rotated in accordance with rotation of the center wheel and pinion, a fourth wheel and pinion (36) coaxial with the center wheel and pinion (24A) and rotated in accordance with rotation of the third wheel and pinion, and a minute transmission wheel (80) slippingly engaged with the center wheel and pinion (24A) on a dial side of a main plate (10) brought in mesh with minute wheels (60,62). The minute transmission wheel (80) is a wheel in a shape of a flat plate, engaged with the center wheel and pinion (24A) at an elastic engaging portion of a center thereof, and slipped when the elastic engaging portion achieves a predetermined or more torque.







Search report