Escapement gear, escapement wheel employing the escapement gear, anchor-shaped escapement, movement, mechanical timepiece and method of torque transmission

Abstract

The invention relates to an escapement gear, an escapement wheel employing the escapement gear, an anchor-shaped escapement, a movement, a mechanical timepiece and a method of torque transmission, capable of rapidly transmitting torque during alternating of impacting surfaces. In the escapement gear (1) of the escapement wheel (2) of the anchor-shaped escapement of the mechanical timepiece, a locking corner (30) which connects a stop surface (10) and an impacting surface (20) becomes a first convexly curved surface portion (31). A convexly curved second portion (21) is arranged on impacting surface (20) at a place being continuous with the first convexly curved surface portion (31) of the locking corner (30). The second convexly curved surface portion (21) may extend over the entire impacting surface (20). At a place further away from the locking corner (30) on the impacting surface (20), the radius of curvature R2 of the second curvedly convex surface portion (21) becomes larger. A portion which is continuous with the second curvedly convex surface portion (21) of the impacting surface (20) surface may be planar.

Description

technical field [0001] The invention relates to an escapement tooth, an escapement wheel equipped with the escapement tooth, an anchor escapement, a movement, a mechanical clock and a torque transmission method. Background technique [0002] In the anchor escapement of a mechanical watch, the escapement teeth of the escape wheel are repeatedly (1) stopped (locked), (2) released from the stop, (3) ) to apply a collision, (4) to stand by until the balance pin of the balance wheel returns to the position where the collision is applied to the pallet fork (into or out of the tile) again, thereby intermittently providing the torque or energy of the spring to the balance wheel . [0003] In the above, it is desirable to efficiently apply torque or supply rotation from the escape wheel to the balance wheel between the escape wheel and the balance wheel during the period from the release of the stop in (2) to the end of the collision in (3). energy. [0004] However, the present i...

AI Technical Summary

Problems solved by technology

[0018] However, with the convex curved portion of the shoe disclosed in Patent Document 2, the above-mentioned sudden change in the direction of the force when the collision surfaces alternate cannot be avoided, and the loss of torque transmission LP2 has not been improved.

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