Device for converting circular motion into noncircular closed line motion

Abstract

The invention provides a device for converting a circular motion into a noncircular closed line motion, which comprises a driving mechanism, a transmission mechanism and a terminal shaft, wherein the transmission mechanism is provided with two input ends for receiving and transmitting common rotary outputs generated by the driving mechanism, and two output ends for providing two kinds of outputs; and the terminal shaft can simultaneously receive the two kinds of outputs transmitted by the transmission mechanism so as to move in the axial direction of the driving mechanism while rotating, thereby facilitating the realization of the noncircular closed line motion. The device can be especially used in a timer, thereby providing a timer of which the pointers can move in a mode of accurately conforming to the periphery of a noncircular dial. The invention also provides a drawing or carving tool comprising the device.

Description

technical field [0001] The present invention relates to a device for converting a circular motion into a non-circular closed-line motion, and to timepieces and tools incorporating such a device. Background technique [0002] Existing timepieces, such as clocks and watches, generally include a dial and hands, and the hands rotate around the center of the dial as a pivot point. Generally speaking, the outermost point of the pointer moves on a circular trajectory, so the shape of the dial is usually circular. [0003] However, non-circular clocks such as rectangular or oval are also very popular in the market due to their unique shapes. In such timepieces, the longest second hand of the hands must be shorter than the smallest radial dimension of the dial so that the second hand can still pivot a full revolution within the dial. However, in this case, when the second hand and the minute hand rotate to the maximum radial dimension position of the dial, there is a shortcoming th...

AI Technical Summary

Problems solved by technology

[0005] However, in this design, how to control the mutual attractive or repulsive force between the magnet and the pointer is very difficult, and often the size of the magnetic interaction force is inappropriate and the length of the pointer is too long or too short. Happening

At the same time, the magnetic force generated by the magnet will undoubtedly have a very adverse effect on the correct operation of the movement inside the timepiece.

In addition, the telescoping scalable structure is also more complicated to implement, and it is prone to failure in long-term work

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