Spring-Loaded Chronograph Zeroing for Single-Press Reset
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Solution Overview
Problem
Existing zeroing devices for chronographs require high user effort and multiple button presses to reliably reset counter hands to zero, are costly due to complex constructions, and have high maintenance needs.
Innovation Solution
A zeroing device with a first compression spring indirectly connected to a control means, which assists the zeroing lever arm to move from a release position to a zero position, reducing the number of components and requiring only one button press for reliable resetting, and is adjustable for fine tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring-loaded mechanism is used to assist the zeroing lever arm movement, then the user effort required to reset counter hands is reduced, but the device complexity increases due to additional spring components
Solution Approach 1:
The compression spring is configured to automatically assist the zeroing lever arm movement without requiring additional user intervention. When the control means is actuated, the spring's stored elastic energy is released to propel the zeroing lever arm toward the zeroing hearts, enabling the reset function to complete itself with minimal user effort rather than requiring the user to manually overcome spring resistance or perform multiple pressing actions
2Reliability
If multiple zeroing cams and hammers are used to ensure reliable zeroing, then the resetting reliability is improved, but the device complexity and production costs increase
Solution Approach 1:
The patent consolidates the zeroing function into a single integrated mechanism where one compression spring works in conjunction with one control means and one zeroing lever arm to simultaneously engage with the zeroing hearts. This unified approach replaces the need for multiple separate zeroing cams and hammers, reducing component count while maintaining reliable resetting function through the coordinated action of the spring-loaded lever arm that ensures positive engagement with the zeroing hearts
3Productivity
If a compression spring is added to assist lever arm rotation, then the productivity of the zeroing operation is improved with single button press, but the manufacturing precision requirements increase
Solution Approach 1:
The control means serves as an intermediary element that coordinates between the compression spring and the zeroing lever arm. It manages the energy transfer from the spring to the lever arm, ensuring that the spring's force is applied at the correct moment and with appropriate magnitude. This intermediary role allows the system to achieve high productivity through single-button operation while the control means absorbs some of the precision requirements, making the overall system more tolerant to manufacturing variations in spring installation
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 solution provides a cost-effective, low-maintenance, and user-friendly mechanism for reliably resetting chronograph counter hands to zero with reduced component complexity and effort.
Implementation Method 1
By means of a spring that exerts a restoring spring force on the zeroing lever, the bar and the zeroing lever are held in a release position
Implementation Method 2
a first compression spring which is supported on the zeroing lever arm and is operatively connected to the control means, wherein the control means interacts indirectly with the zeroing unit via the first compression spring
Data Source
AI summary
A zeroing device 100 for a chronograph, having at least one zeroing heart 110, 120, a zeroing unit 200, which has a zeroing lever arm 210 and a zeroing lever bar 220, a first end 221 of which contacts the zeroing heart 110, 120, and a control means 130 which interacts with the zeroing lever arm 210. A zeroing of the zeroing unit 200 is effectuated by actuating the control means 130. This enables low production and maintenance costs and allows the counter hands to be reset to the zero position in a safer, more durable, and user-friendly manner. The zeroing device 100 includes a first compression spring 140 which is supported on the zeroing lever arm 210 and is) operatively connected to the control means 130. The control means 130 interacts indirectly, via the first compression spring 140, with the zeroing unit 200.