Motorized Hinge Screw Drive for Stable Foldable Hovering
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Solution Overview
Problem
Foldable electronic devices experience significant rotational play and wobbling due to cumulative rotational clearance in the motor assembly, leading to a poor user experience, especially when opening or closing the device.
Innovation Solution
A motorized hinge drive device with a lead screw and nut assembly, first and second flip drive assemblies, and a spring assembly, where the flip drive assemblies are positioned on opposite or same sides of the nut, and driven by a motor assembly to amplify torque and reduce rotational play, enhancing hovering stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor assembly is incorporated into the hinge to enable automatic opening and closing, then the opening and closing experience is improved, but rotational play and wobbling increase due to cumulative rotational clearance in the motor assembly
Solution Approach 1:
A friction connector is introduced as an intermediary component between the motor assembly and the hinge. This friction connector provides friction-based coupling that compensates for the rotational clearance in the motor assembly, thereby reducing the cumulative rotational play and wobbling while maintaining the automatic opening and closing function
Solution Approach 2:
The friction connector is pre-configured with specific friction characteristics before the hinge operation begins. This preliminary friction coupling ensures that the motor assembly's rotational movements are transmitted to the hinge without excessive play, preparing the system to maintain stability from the start of operation
2Stability of the object's composition
If additional rotational resistance and locking forces are manually added to the hinge mechanism for stability, then hovering stability is improved, but manual flipping becomes labor-intensive
Solution Approach 1:
The manual friction resistance and mechanical locking forces are replaced with a motorized system. The motor assembly provides controlled rotational force to achieve hinge movement, while the friction connector maintains stability during hovering, eliminating the need for manual effort to overcome locking forces
Solution Approach 2:
The motor assembly automatically provides the necessary force for opening and closing the hinge without requiring manual intervention. The system serves itself by using the motor's rotational output, transmitted through the friction connector, to maintain both stability and enable smooth operation
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
The device achieves automatic unfolding and folding with reduced hovering resistance, requiring lower motor torque and improving stability by amplifying output torque and increasing flipping resistance.
Implementation Method 1
a lead screw and nut assembly (1), a first flip drive assembly (2), a second flip drive assembly (3), a spring assembly (4), and a motor assembly (5); wherein the lead screw and nut assembly (1) includes two lead screws (11) arranged oppositely and a nut (12) simultaneously fitted on both of the two lead screws (11)
Implementation Method 2
the spring assembly (4) is clamped between the first slider (21) and the second slider (31), and is provided with a pre-load force
Data Source
AI summary
Disclosed is a motorized hinge drive device, a hinge device, and an electronic device. The motorized hinge drive device includes: a lead screw and nut assembly, a first flip drive assembly, a second flip drive assembly, a spring assembly, and a motor assembly. The lead screw and nut assembly includes two lead screws arranged oppositely and a nut simultaneously fitted on both of the two lead screws. The first flip drive assembly includes a first slider simultaneously sleeved on the two lead screws and two first rotation arms that are oppositely arranged and are respectively sleeved on the two lead screws. The second flip drive assembly includes a second slider simultaneously sleeved on the two lead screws and two second rotation arms that are oppositely arranged and are respectively sleeved on the two lead screws. The present disclosure achieves automatic unfolding and folding, and achieves good hovering stability.