JP2005300282A5 - - Google Patents

Claims (9)

A train wheel to which a pointer for displaying the measurement time is engaged, a heart cam press-fitted and fixed to a part of the train wheel, and a nulling lever for giving a predetermined rotation to the heart cam to nullify the pointer, In an analog chronograph timepiece having an external operation member for operating the zero return lever, the position of the pointer at the start of measurement is different from the position of the pointer at the time of the maximum measurement time,
An analog chronograph timepiece characterized in that a restricting member having a heart cam rotation restricting portion for restricting the rotation angle of the heart cam is provided with a predetermined plane gap with the heart cam.   2. The analog chronograph timepiece according to claim 1, wherein an angle difference between the position of the pointer at the start of measurement and the position of the pointer when the maximum measurement time elapses is 180 degrees or less. Analog chronograph timepiece according to any one of claims 1 to 2, characterized in that the heart cam rotation restricting portion is formed of a metal material.   The analog chronograph timepiece according to any one of claims 1 to 3, wherein the restricting member is a train wheel bridge that holds the train wheel.   The analog chronograph timepiece according to claim 4, wherein the regulating member is a holding member constituting a resin-made timepiece movement adjacent to the heart cam. The said heart cam rotation control part has the said heart cam and predetermined plane clearance gap at the time of the chronograph stop or the maximum measurement time of a chronograph, The Claim 1 thru | or 5 characterized by the above-mentioned. analog chronograph watch.   The analog chronograph timepiece according to any one of claims 1 to 6, wherein a convex portion for restricting a rotation direction of the heart cam is provided at a tip of the return zero lever.   The analog chronograph according to any one of claims 1 to 7, wherein the vehicle in which the heart cam is press-fitted and fixed in the train wheel is a minute chronograph wheel for displaying a minute measurement result. clock. The heart cam rotation restricting portion of the restricting member is configured as a separate part, and the heart cam rotation restricting portion is deleted, so that the restriction member is commonly used in a general analog chronograph timepiece that does not require restriction of the rotation angle of the heart cam. 9. The analog chronograph timepiece according to claim 1, wherein the analog chronograph timepiece is used as a part.