Timepiece Glass-Bezel Assembly with Disjoint Junctions
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Solution Overview
Problem
Traditional timepieces, such as watches, face challenges in effectively amplifying and diffusing sound signals due to their compact size and numerous components that dampen vibrations rather than amplify them, making it difficult to achieve clear sound transmission from small sound sources like gongs or keyboards.
Innovation Solution
A method of assembling a crystal and bezel with disjoint junction zones that allow free vibration of the crystal's periphery, sealed with flexible seals to prevent interference, and using materials like ceramic or the same material as the crystal to transmit vibrations without damping, ensuring the crystal resonates effectively and amplifies sound signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the crystal is rigidly mounted on the bezel to ensure mechanical stability, then the structural reliability is improved, but the sound diffusion is degraded due to damping of vibrations
Solution Approach 1:
The mounting interface is segmented into discrete contact points rather than continuous contact. The crystal is supported at multiple separated locations on the bezel, allowing vibrations to occur in the spaces between contact points while maintaining mechanical stability at the contact locations themselves.
Solution Approach 2:
Different regions of the crystal-bezel interface have different properties: contact regions provide mechanical support and stability, while non-contact regions allow free vibration for sound diffusion. The notches are positioned to create localized support zones that do not interfere with the overall vibrational characteristics.
2Strength
If the crystal is mounted by elastic lining to reduce stress, then the mechanical stress is reduced, but the sound quality is degraded due to excessive energy absorption
Solution Approach 1:
The elastic lining material is completely removed from the mounting structure. Instead of using an elastic intermediary layer between the crystal and bezel, the design relies on direct rigid contact at discrete points through the notches, eliminating the energy-absorbing elastic element while maintaining mechanical support.
3Object-generated harmful factors
If the peripheral space between crystal and bezel is left open to allow free vibration, then the sound diffusion is improved, but the sealing is degraded allowing environmental contamination
Solution Approach 1:
A flexible sealing membrane is introduced to close the peripheral space between the crystal and bezel. This thin film barrier prevents environmental contamination while being sufficiently compliant to allow vibrational energy to transmit through it, maintaining sound diffusion performance while providing environmental protection.
4Ease of manufacture
If the crystal is fixed directly perpendicular to the bezel to simplify mounting, then the manufacturing complexity is reduced, but the vibration transmission is degraded due to misalignment with the sound wave direction
Solution Approach 1:
The crystal orientation is changed from a fixed perpendicular mounting to a tilted configuration that aligns with the direction of sound wave propagation. This dynamic adjustment of the mounting angle optimizes the transmission of vibrational energy from the bezel through the crystal in the direction needed for effective sound diffusion.
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
This solution significantly increases the acoustic level of sound signals, ensuring they are audible to the user and others without distorting the sound quality, by allowing the crystal to vibrate freely and transmit vibrations efficiently, resulting in a substantial 20 dBA acoustic gain compared to traditional timepieces.
Implementation Method 1
allow free vibration of the greater part of the periphery of said crystal... to cause said crystal to resonate under the action of the vibrations which are transmitted to it by said bezel
Implementation Method 2
to cause said crystal to resonate under the action of the vibrations which are transmitted to it by said bezel at the level of said zone or zones of junction
Implementation Method 3
said sealing means comprising at least one flexible seal or a silicone or similar seal... deployed between said bezel and said glass and not impeding the vibrations of the latter
Data Source
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AI summary
The method involves forming junction areas (4) by restricting direct contact surfaces between a glass (2) and a bezel (3) by removing material from periphery of the glass or/and the bezel, and/or by placing a shin (5) between the glass and the bezel. The glass is fixed on the bezel by supporting and clamping the glass with each junction area so as to transmit vibration communicated to the bezel, to the glass. The glass is maintained at a distance from the bezel in a peripheral space at an outer side of the junction areas to allow the vibrations of the bezel without hindrance. Independent claims are also included for the following: (1) a glass-bezel assembly for a timepiece (2) a timepiece comprising a middle.