Timepiece Eccentric Pin Release Mechanism for Spring Unwinding
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Solution Overview
Problem
The existing mechanical timepieces require complex operations to unwind the spring, involving simultaneous insertion of pins or members into through-holes to disengage the pawl lever and transmission wheel, making the process cumbersome and difficult to execute without removing the wheel train bridge.
Innovation Solution
A timepiece design featuring an eccentric pin mechanism that allows for easy engagement and disengagement of the pawl lever and transmission wheel, with a position indicator on the train bridge to simplify the unwinding process by enabling the eccentric pin to switch between engaged and released states, allowing for simultaneous operation of disengaging and unwinding with reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pins or members are inserted into through-holes to disengage the pawl lever and transmission wheel, then the spring can be unwound without removing the wheel train bridge, but the operation becomes complex requiring three simultaneous operations
Solution Approach 1:
The release mechanism extracts the disengagement function from the through-holes and pins, concentrating it in a single dedicated mechanism that can be operated independently to release either the pawl lever or transmission wheel engagement
Solution Approach 2:
The release mechanism is segmented into two independent functions: one for disengaging the pawl lever from the transmission wheel, and another for disengaging the transmission wheel from the ratchet wheel, allowing selective operation rather than requiring both simultaneously
2Productivity
If three operations are executed simultaneously to unwind the spring, then the spring can be released, but the task becomes complicated and difficult to execute
Solution Approach 1:
The release mechanism performs preliminary disengagement actions before spring unwinding is needed, separating the engagement disengagement function from the unwinding function, so that when unwinding is required, only a simple operation is needed rather than coordinating three simultaneous actions
Solution Approach 2:
The release mechanism acts as an intermediary between the user and the complex engagement system, providing a simplified interface that handles the coordination of disengagement internally while presenting a simple external operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design simplifies the unwinding process by allowing two operations to be performed simultaneously, reducing the complexity and ease of use compared to traditional methods, while maintaining precise engagement and disengagement of the pawl lever and transmission wheel without removing the train bridge.
Implementation Method 1
the release mechanism is an eccentric pin disposed between one of the pawl lever parts and the transmission wheel, and is rotatable between an engaged position where the one pawl lever part and the transmission wheel change to the engaged state, and a release position where the one pawl lever part and the transmission wheel change to the released state
Data Source
AI summary
Provided is a timepiece that improves the ease of unwinding a spring. The timepiece has a bridge disposed between the rotor and the main plate when seen in a side view; a pawl lever that is disposed between the rotor and bridge in side view, moves bidirectionally in a direction toward and a direction away from the transmission wheel in conjunction with the rotor, and causes the transmission wheel to turn in one direction; a release mechanism that is disposed to the bridge, and can change between an engaged state in which the pawl lever and the transmission wheel are engaged, and a released state in which the pawl lever and the transmission wheel are not engaged; and a train bridge disposed in side view between the pawl lever and the rotor, and having a first hole disposed to a position superimposed with the release mechanism when seen in a plan view.