Helical Thrust Conversion Mechanism for Wide-Angle Hinge Motion
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Solution Overview
Problem
Conventional motion direction converting mechanisms face limitations in increasing linear motion without increasing driving force and suffer from interference issues when cases are opened wide, leading to gaps and reduced screen continuity in hinge mechanisms.
Innovation Solution
A thrust converting mechanism with a shaft having helical mated portions, linear motion members, a rocking member, and a moving member that converts limited shaft rotation into increased linear motion and perpendicular movement, eliminating interference between case end portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the screw lead is increased to increase the amount of movement of the nut, then the linear motion distance is improved, but the driving force required to rotate the threaded shaft increases
Solution Approach 1:
The mechanism is divided into two independent threaded shafts (first and second threaded shafts) with different screw leads. The first linear motion member converts rotation to linear motion along the first shaft, while the second linear motion member converts rotation to linear motion along the second shaft. This segmentation allows each shaft to have optimized screw leads for their specific functions, resolving the contradiction between motion distance and driving force.
Solution Approach 2:
The invention transitions from a single linear motion direction (along one threaded shaft) to two-dimensional motion by introducing a second threaded shaft oriented perpendicularly. The first linear motion member moves along the first shaft while the second linear motion member moves along the second shaft, enabling the display to achieve both width expansion and height adjustment, thereby increasing total motion distance without requiring excessive driving force in any single direction.
2Ease of operation
If the bearing portion is positioned away from the end portion of the case to avoid interference, then the pivoting angle is improved, but a gap is created between case end portions when opened flat
Solution Approach 1:
The invention uses two perpendicular threaded shafts to enable motion in two dimensions. The first threaded shaft allows linear motion along its axis, while the second threaded shaft (perpendicular to the first) allows linear motion in a perpendicular direction. This two-dimensional motion capability allows the display to achieve both wide-screen positioning (reducing gaps) and adequate pivoting angle range by distributing the motion requirements across two independent axes.
Solution Approach 2:
The second linear motion member acts as an intermediary mechanism that converts rotation around the first threaded shaft into linear motion along the second threaded shaft. This intermediary mechanism enables the system to achieve complex two-dimensional positioning while maintaining simple rotational inputs, resolving the contradiction between pivoting angle and gap elimination.
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
Enables increased linear motion without increased driving force and prevents gaps between case end portions when opened, expanding application scope and ensuring continuous screen display.
Implementation Method 1
a shaft provided with a pair of helical mated portions, formed in mutually opposing directions; a pair of linear motion members having mating portions for engaging, respectively, the pair of mated portions
Data Source
AI summary
A thrust converting mechanism has a shaft provided with a pair of helical mated portions, formed in mutually opposing directions; a pair of linear motion members having mating portions for engaging, respectively, the pair of mated portions; a case for supporting the pair of linear motion members so as to enable movement along the shaft, and for bearing the shaft rotatably; a rocking member that is borne on one of the linear motion members of the pair, and for engaging with the other linear motion member of the pair, and for rocking through relative motion of the shaft in respect to the case; and a moving member, supported on the case, that engages with the rocking member to move, through rocking of the rocking member, in a direction that crosses the shaft.