Rotating Bezel System Elastic Spring Mounting
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Solution Overview
Problem
Existing rotating bezel systems for timepieces require significant force to mount and are difficult to dismantle, leading to potential deformations and malfunction due to incorrectly applied stresses, making them challenging to assemble and disassemble.
Innovation Solution
A rotating bezel system with a pre-assembled design featuring a spring ring with varying radii zones and a toothed element for unidirectional rotation, allowing for easier mounting and disassembly by absorbing stress through elastic deformation, reducing the force required for assembly and simplifying the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rotating bezel system is force-fitted onto the middle part, then the bezel is securely fixed to the middle part, but significant force is required and deformations may occur
Solution Approach 1:
The continuous projection on the bezel is segmented into multiple discrete projections distributed around the circumference. This segmentation allows the mounting force to be distributed across multiple contact points with the groove, reducing the peak force required at any single point and minimizing the risk of deformation during assembly.
Solution Approach 2:
The groove in the middle part is designed with specific local geometric features that complement the discrete projections on the bezel. The groove profile is optimized to engage with the projections in a way that distributes mounting stresses locally, reducing the overall force required for secure fixation while preventing deformation.
2Strength
If the rotating bezel system is force-fitted onto the middle part, then the bezel is securely fixed, but the system becomes difficult to dismantle and may be destroyed
Solution Approach 1:
The connection between the bezel and middle part transitions from a static, permanent force-fit to a dynamic, reversible engagement. The discrete projections engage with the groove in a controlled manner that allows for easy disengagement by applying a simple release force, enabling the system to be dismantled and reassembled multiple times without damage.
Solution Approach 2:
The mounting mechanism is designed to be replaceable rather than permanent. The bezel system can be easily removed and replaced if needed, treating the mounting connection as a temporary, reversible attachment rather than a permanent bond, which simplifies maintenance and replacement operations.
3Strength
If significant force is applied during mounting, then the bezel is securely fixed, but deformations and malfunction may occur
Solution Approach 1:
By segmenting the continuous projection into multiple discrete projections, the mounting force is distributed across multiple engagement points. This reduces the peak stress at any single location, preventing local deformations that could lead to malfunction while still achieving secure fixation through the cumulative effect of multiple engagement points.
Solution Approach 2:
The groove geometry is designed in advance to accommodate the discrete projections with appropriate clearance and stress distribution features. This pre-engineered geometry acts as a cushion that absorbs and distributes mounting stresses before they can cause deformations, ensuring reliable operation after assembly.
4Duration of action of stationary object
If the bezel is made of steel with good lifespan, then durability is improved, but the force required for mounting increases
Solution Approach 1:
Segmenting the continuous projection into discrete projections reduces the force required for mounting steel bezels. The segmented design allows the rigid steel material to be engaged in a way that distributes stresses, making assembly easier while maintaining the durability and service life advantages of steel construction.
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 facilitates simpler and less constrained assembly, reduces the risk of deformation and malfunction, and allows for easier storage and transport of pre-assembled bezel systems, while enabling bidirectional or unidirectional rotation depending on the configuration.
Implementation Method 1
the stress exerted during assembly is partly absorbed. This stress is absorbed by the spring which will deform and facilitate assembly
Data Source
Figure 1~2
Figure 3~7
Figure 5
AI summary
The timepiece (1) has a middle portion closed by a back portion and a crystal and comprising a peripheral shoulder in which a groove is formed. The groove is placed on a shoulder surface parallel to a central axis of the middle portion. A rotating bezel system (20) is rotatably mounted on the shoulder, and includes a bezel ring (41) provided with a recess (46) arranged on a surface of a bezel intended to face the groove when the system is assembled on the middle portion. The system includes a spring extending into the recess and the groove at same time to hold the system on the middle portion.