Removable Hinge Cap Locking for Serviceable Hinge Assemblies
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Solution Overview
Problem
Existing hinge assembly designs in computing devices are not aesthetically pleasing due to visible rubber covers or require large space with snaps, and replacing failed parts necessitates replacing the entire assembly, leading to high service costs.
Innovation Solution
A hinge assembly with a removable hinge cap and a lock cam mechanism that allows access to components for service or replacement without disassembling the entire assembly, maintaining aesthetic design and reducing service costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If rubber covers are used to cover screws in hinge assembly, then aesthetic appearance is improved, but serviceability deteriorates as the entire assembly must be replaced when screws fail
Solution Approach 1:
The hinge assembly is divided into separate functional components: a hinge cover (providing aesthetic appearance with rubber covers), a hinge body (containing screws and mechanical components), and a hinge plate. This segmentation allows the hinge cover to be aesthetically pleasing while enabling independent access to and replacement of the hinge body components, resolving the contradiction between appearance and serviceability.
2Ease of manufacture
If snaps are used to connect hinge cover with housing, then ease of assembly is improved, but device volume increases due to large space requirements
Solution Approach 1:
The connection mechanism between the hinge cover and housing is extracted from the traditional snap-fit design and replaced with an adhesive bonding system. This extraction allows the use of a thinner, more space-efficient adhesive layer instead of bulky snaps, reducing device volume while maintaining ease of assembly through the adhesive application process.
3Shape
If adhesive is used to cover fasteners connecting hinge cover with housing, then aesthetic appearance is improved, but serviceability deteriorates as hinge assembly becomes inaccessible
Solution Approach 1:
The hinge assembly is segmented into a hinge cover (bonded with adhesive for aesthetics) and a hinge body (containing accessible fasteners). The hinge cover is designed as a separate cosmetic component that can be removed or transparent, allowing the adhesive to provide aesthetic coverage while the underlying hinge body components remain accessible for service and replacement.
4Reliability
If entire hinge assembly is replaced when parts fail, then reliability is maintained, but service cost increases significantly
Solution Approach 1:
The hinge assembly is segmented into replaceable modules: the hinge cover, hinge body, and hinge plate. This segmentation enables selective replacement of only the failed component (such as individual screws or the hinge body) rather than the entire assembly, maintaining functional reliability while significantly reducing service costs through targeted repairs.
Solution Approach 2:
The design enables discarding and replacing only the specific failed component (such as screws or hinge body) while recovering and reusing the functional hinge plate and other intact components. This selective replacement strategy maintains system reliability while minimizing waste and reducing service costs compared to replacing the entire hinge assembly.
Data Source
AI summary
In some examples, a hinge assembly can include a hinge bar including a rotation axis, a lock cam including a protrusion, the lock cam located coaxially with the rotation axis of the hinge bar, and a removable hinge cap to cover the hinge bar and the lock cam where the removable hinge cap includes a lock flange, and where the protrusion is located adjacent to the lock flange to prevent translation of the removable hinge cap relative to the hinge bar when the lock cam is in a lock position.