Ceramic Watch Bracelet Link Spacer Assembly
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Solution Overview
Problem
Existing methods for assembling spacer pieces in ceramic links for bracelets or timepieces, such as pins or spacer pieces, often damage the ceramic material due to irreversible bonding or limited resistance, making it difficult to assemble and dismantle without causing damage.
Innovation Solution
A housing insert with a machined external and internal portion is used to securely hold the spacer piece, allowing for a force fit and adjustable assembly, which can be pre-assembled and easily dismantled, preventing damage to the ceramic material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spacer pieces or pins are driven directly into ceramic material, then assembly is simplified, but the ceramic material is damaged
Solution Approach 1:
A metal insert is introduced as an intermediary component between the spacer piece and the ceramic link. The insert is first assembled into the ceramic link (by irreversible bonding or welding), and then the spacer piece is driven into the insert. This mediator protects the ceramic material from direct impact while enabling force fit assembly of the spacer piece.
2Object-affected harmful factors
If spacer pieces are bonded in blind bores, then ceramic material is protected, but resistance and reliability are limited
Solution Approach 1:
The solution uses a composite structure combining ceramic material for the link body (providing protection and aesthetics) with metal insert and spacer piece (providing mechanical strength and reliable connection). This composite approach allows each material to contribute its optimal properties: ceramic for protection and metal for mechanical resistance.
3Reliability
If irreversible welding is used to mount spacer pieces, then connection strength is improved, but dismantling and adjustment become impossible
Solution Approach 1:
The assembly is segmented into three separable components: the ceramic link, the metal insert, and the spacer piece. The insert is irreversibly fixed to the ceramic link, but the spacer piece remains reversibly mounted in the insert. This segmentation allows the spacer piece to be dismantled and adjusted without affecting the ceramic link, while maintaining strong connection during use.
4Strength
If ceramic material is used for links, then aesthetics and hardness are improved, but stress resistance during assembly and use deteriorates
Solution Approach 1:
The link assembly uses composite materials where ceramic provides surface hardness and aesthetics, while metal insert and spacer pieces provide stress resistance and mechanical flexibility. The metal components absorb assembly stresses and user stresses, protecting the ceramic material from damage while maintaining its beneficial properties.
Data Source
AI summary
Housing insert for a spacer of a ceramic link for a bracelet, including a housing for receiving a spacer having one end. It includes an external machined portion arranged to cooperate with this housing and an internal machined portion including a substantially cylindrical bearing area, arranged to closely receive this end and having a smaller diameter than that of this end. An equipped link includes such a link and such an insert of this type fixed in this housing. A bracelet including includes a plurality of equipped lateral links into which removably mounted spacers are driven. This bracelet includes intermediate links assembled to pivot freely relative to these spacers or relative to pins pivotably mounted in these equipped links.