Synchronous Dual-Axle Hinge With Guided Plate Retention
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Solution Overview
Problem
Hinges in foldable electronic devices with infolding structures are prone to user-induced damage due to improper operation, causing the movable plate to be removed from the rotary blocks during rotations.
Innovation Solution
A hinge design featuring a base frame unit with rotatable axle units, synchronizing units, movable bracket units, and guiding bracket units, where guiding connecting members with sliding grooves and protrusions prevent removal of the movable plates from the rotary blocks by engaging in specific positions to secure the movable plates to the hinge shafts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the movable plate is allowed to move freely relative to the rotary blocks during hinge rotation, then the ease of operation is improved, but the reliability deteriorates due to improper user operation causing the movable plate to be removed from the rotary blocks
Solution Approach 1:
The guiding connecting members act as intermediary elements between the movable plates and the rotary blocks. These members include guiding grooves that guide the movement of the movable plates and limiting protrusions that prevent excessive movement. This intermediary structure allows normal operation while preventing damage from improper use.
2Reliability
If the movable plate is securely constrained to prevent removal, then the reliability is improved, but the ease of operation deteriorates due to restricted movement
Solution Approach 1:
The guiding connecting members provide dynamic constraint rather than static fixation. The guiding grooves allow the movable plates to move freely within the normal rotation range, while the limiting protrusions only engage when excessive movement is attempted. This dynamic approach maintains ease of operation while ensuring reliability.
Data Source
AI summary
A hinge includes two rotatable axle units each having two hinge shafts, two synchronizing units each disposed to make synchronous rotations of the hinge shafts, two movable bracket units each having a turnable base plate, two rotary blocks non-rotatably sleeved on the hinge shafts, and two movable plates movable relative to the rotary blocks, and two guiding bracket units, each having male and female arms respectively connected with two movable plates, and a plurality of guiding connecting members interposed between the arms. Each guiding connecting member has a protrusion and a sliding groove, and is angularly movable with the rotations of the hinge shafts. Removal of the protrusion from the sliding groove of an adjacent guiding connecting member is prevented by means of engagement of an abutting portion of the protrusion with an abutted block in the groove.