Hinge Cover Attachment Design for Tool-Free Maintenance Access
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Solution Overview
Problem
Conventional hinge devices for doors or covers in ultra-deep freezers are difficult to detach and can scratch the mounting bases during removal, leading to maintenance issues and appearance deterioration.
Innovation Solution
The hinge device features a cover with recesses and grooves on the mounting bases, allowing the cover to be easily attached and detached without tools, with engaging portions that slide into place and projections that secure the cover, preventing excessive firm engagement and ensuring stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is fitted to the mounting base by bending the cover and using projections in grooves, then the cover can be installed to conceal mounting screws, but the cover cannot be easily removed and requires tools that may scratch or damage the cover and mounting base surfaces
Solution Approach 1:
The mounting base is divided into two functional zones: a first side surface with grooves for engagement and a second side surface with a recess for receiving the cover. This segmentation allows the cover to be attached without tool intervention while preventing damage to surfaces.
Solution Approach 2:
The recess on the second side surface acts as an intermediary structure that receives the cover, allowing the cover to be securely held in place without direct engagement with the grooves on the first side surface. This mediates the attachment process to prevent scratching.
2Shape
If the cover is made of metal material like stainless steel to match the mounting base, then the appearance is maintained, but the cover becomes difficult to detach and may be damaged by tools
Solution Approach 1:
The mounting base is segmented into a first side surface with grooves and a second side surface with a recess. The cover engages with the recess rather than being tightly fitted to the entire mounting base, allowing easy removal while maintaining appearance.
Solution Approach 2:
The cover engagement mechanism is extracted from the traditional groove-fitting method and relocated to a dedicated recess on the second side surface. This extraction allows the cover to be easily detached for maintenance while preserving the metallic appearance.
3Reliability
If the cover is tightly fitted to the mounting base to ensure stability, then the cover does not come off, but the cover cannot be easily removed for maintenance
Solution Approach 1:
The mounting base is segmented into a first side surface with grooves for engagement and a second side surface with a recess for receiving the cover. This segmentation allows the cover to be securely held in place without tool intervention while preventing damage to surfaces.
Solution Approach 2:
The cover attachment mechanism transitions from a two-dimensional groove fitting on the first side surface to a three-dimensional recess reception on the second side surface. This dimensional change provides stable attachment while enabling easy removal.
Data Source
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AI summary
A hinge device features improved ease of installation/removal of covers thereof to/from mounting bases thereof. The hinge device, which has mounting bases (11,21) and knuckles (12,22), is connected such that it swings on a hinge pin (30) inserted in the knuckles. The covers (30,31) conceal mounting screws of the mounting bases. Each of the mounting bases (11,21) has recesses (19) formed in a side surface (11A,21A) on a non-supporting side, grooves (17,27) which are formed in a side surface (11B,21B) adjacent to both ends in the axial direction of the hinge pin (30) and which extend to a side surface, and an engaged portion concavely formed in each of the groove. The inner side of the cover has engaging portions (32,32) which are inserted in the groove (17,27) and which detachably engages with the engaged portion when the cover is installed, and also has protruding streaks (33) which enter into and engage with the recesses (19).