Watch Case Back Orientation With an Integrated Position Pin
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Solution Overview
Problem
Existing watch backs often fail to align decorative patterns or inscriptions with the 12 o'clock-6 o'clock vertical axis upon screwing, compromising aesthetics, especially in high-end watches, and replacing the back does not guarantee proper alignment.
Innovation Solution
A device comprising a casing ring with a position pin that cooperates with machined features on the back to ensure alignment along the 12 o'clock-6 o'clock axis, combined with a compressible gasket for leakproof sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a back is screwed onto a watch case middle, then the back is securely fastened, but the decorative patterns or inscriptions on the back face are not properly aligned with the 12 o'clock-6 o'clock vertical axis
Solution Approach 1:
The position pin is pre-configured on the casing ring at a specific angular position before assembly. This preliminary positioning ensures that when the back is screwed onto the middle, the decorative patterns or inscriptions on the back face automatically align with the 12 o'clock-6 o'clock vertical axis, eliminating the need for manual alignment adjustment during assembly.
2Reliability
If a specific watch case is paired with a back during machining, then proper alignment is ensured, but replacement of the back becomes problematic and cannot guarantee proper alignment
Solution Approach 1:
The position pin is integrated into the casing ring, which is a universal component that can be applied to different watch cases. This design allows the same casing ring with the position pin to ensure proper alignment when paired with various backs, making the system adaptable and enabling back replacement while maintaining alignment reliability across different configurations.
3Manufacturing precision
If a position pin is added to the casing ring, then proper alignment of the back is ensured, but the device complexity increases
Solution Approach 1:
The position pin is merged with the casing ring to form an integrated component. This combination ensures proper alignment of the back while minimizing the increase in device complexity, as the position pin does not require separate mounting hardware or additional assembly steps beyond the standard screwing process.
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
Ensures proper alignment of decorative elements and leakproof sealing of the watch back, allowing for easy orientation and secure fitting without relying on specific case pairings.
Implementation Method 1
the device comprises a ring gasket made of a compressible material, said gasket being placed between the back and the middle to procure the leakproof seal
Data Source
AI summary
A device for fastening a back (1) to a middle (2) of a watch case (100), the back (1) being arranged to be driven onto the watch case (100). The device includes a casing ring (3) to which is connected at least one position pin (4), the position pin (4) being arranged to cooperate with at least one machining (10) in the back (1) so as to guarantee the orientation of the back (1) relative to the middle (2) along the 12 o'clock-6 o'clock axis of the watch.