A fine-tuning mechanism with a lockable balance wheel and fast and slow needles

Abstract

The invention discloses a fine-tuning mechanism for a fast and slow needle that can be locked by a balance wheel with a card, comprising a balance splint, a hairspring outer post, a hairspring, a shock absorber, a balance wheel and a speed and slow needle mechanism. The balance splint is fixed on the movement of a mechanical watch. Above, the inner end of the hairspring is connected to the balance wheel shaft, and the speed needle mechanism is composed of a speed needle body, a hairspring clamp, a speed needle connecting rod and a fine-tuning screw of a large cap and a small eccentric shaft. The body and the speed needle connecting rod are set on the pendulum cleat through the shock absorber, the hairspring is arranged in the hairspring clamp, and the outer end of the hairspring is fixedly connected with the outer pile of the hairspring, and the hairspring clamp is composed of a hairspring locking flap and a hairspring It consists of moving lock flaps. The hairspring outer post and the speed needle of the present invention can be fixed and easy to adjust, the hairspring and the hairspring clip are firmly attached, which is convenient for the rapid coarse and fine adjustment of the position of the speed and slow needle body, and the structure is reasonable, and the accuracy of the watch is improved. s efficiency.

Description

technical field [0001] The invention relates to the technical field of mechanical watches with a card, in particular to a fine-adjustment mechanism for a lockable balance wheel with a card. Background technique [0002] The travel time adjustment mechanism of the balance wheel of a mechanical watch with a card is composed of a movable outer stake and a fast and slow needle. Since the outer stake and the fast and slow needle cannot be fixed, it is often caused by external factors such as bumps and bumps during use: (1) The external stake Displacement occurs, which causes isochronous errors in the watch to cause deflection; (2) The fast and slow needles are displaced, which changes the length of the hairspring that is effectively used, and the watch travels faster or slower. In addition, in order to facilitate the adjustment of the speed needle of the balance wheel travel time adjustment mechanism of the mechanical watch with card, there is a certain gap between the hairspring...

AI Technical Summary

Problems solved by technology

[0002] The travel time adjustment mechanism of the balance wheel of a mechanical watch with a card is composed of a movable outer stake and a fast and slow needle. Since the outer stake and the fast and slow needle cannot be fixed, it is often caused by external factors such as bumps and bumps during use: (1) The external stake Displacement occurs, which causes the isochronous error of the watch to cause deflection; (2) The displacement of the fast and slow hands causes the length of the hairspring to be effectively used to change, and the watch travels faster or slower

In addition, in order to facilitate the adjustment of the speed needle of the balance wheel travel time adjustment mechanism of the mechanical watch with card, there is a certain gap between the hairspring and the speed needle clip, which causes the hairspring to sometimes stick to the inner clip, sometimes to the outer clip, or just stick to the outer clip during the vibration process. Attach one side of the clip, or not attach the clip, so that the actual working length of the balance spring changes at any time, resulting in unstable vibration cycle of the balance wheel, resulting in inaccurate travel time of the watch

Images