Mechanical component, timepiece, and manufacturing method of mechanical component

A timepiece comprising:

• an axle that has a recess, the recess having a first tapered surface inclined with respect to an axial direction of the axle, the axle having a groove recessed inward of the recess in a plan view when viewed in the axial direction of the axle;
• a rotary member holding the axle at a position of the recess, the rotary member having:
• a rim having a plurality of teeth;
• a first holder extending from the rim toward the axle along a first direction, the first holder being fitted into the groove, the first holder having a tip that is located closer to a center side of the axle than a bottom of the recess when viewed in a cross-sectional direction of the axle;
• and
• a second holder having a first member extending along a second direction intersecting the first direction, the second holder having a second member extending from the first member toward the axle along a third direction, the second member coming in contact with the first tapered surface of the recess;
• and
• a movement barrel operatively associated with the axle and the rotary member.

A manufacturing method of a mechanical component for a timepiece, the method comprising:

• form an axle;
• forming a recess in the axle, the recess having a first tapered surface inclined with respect to an axial direction of the axle;
• forming a groove in the axle, the groove being recessed inward of the recess in a plan view when viewed in the axial direction of the axle;
• forming a rotary member holding the axle at a position of the recess, the rotary member having,
• a rim having a plurality of teeth;
• a first holder extending from the rim toward the axle along a first direction, the first holder being fitted into the groove, the first holder having a tip that is located closer to a center side of the axle than a bottom of the recess when viewed in a cross-sectional direction of the axle;
• and
• a second holder having a first member extending along a second direction intersecting the first direction, the second holder having a second member extending from the first member toward the axle along a third direction, the second member coming in contact with the first tapered surface of the recess
• inserting the axle into the rotary member along the axial direction of the axle so that the first holder is fitted into the groove and second member of the second holder is fitted into the recess,
• wherein the first tapered surface is formed in a periphery of the axle around the axial direction of the axle, and a diameter of the first tapered surface decreases as the first tapered surface is closer from one end side to the other end side in the recess,
• wherein the first holder is configured with a plurality of the first holders and the recess is configured with a plurality of the recesses that are formed in a periphery of the axle, and
• an inner diameter of a virtual circle connecting inner lips of the first holders is smaller than an outer diameter of a virtual circle connecting the bottoms of the recesses around the axle.