Magnetic Sliding Front Assembly for Smartphone Screen Ratio
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Solution Overview
Problem
Conventional technologies restrict the miniaturization of front elements in terminals, such as cameras and sensors, which affects the screen ratio of devices like smartphones aiming for an all-screen design, as they require a larger form factor due to mechanical sliding mechanisms that are bulky and inefficient.
Innovation Solution
A front assembly sliding structure utilizing magnetic bodies, including electromagnets and permanent magnets, with a non-magnetic shim to concentrate magnetic force lines, allowing the front slider to move between positions without fixed mechanical components, thereby increasing screen ratio without compromising functionality or reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical sliding mechanisms are used for front elements, then the elements can be moved between positions, but the mechanisms become bulky and reduce the screen ratio
Solution Approach 1:
The patent replaces conventional mechanical sliding mechanisms with a magnetic field-based driving system. Electromagnets and permanent magnets are used to generate magnetic forces that drive the front slider to move between positions, eliminating the need for bulky mechanical components like gears, springs, and cam mechanisms. This substitution significantly reduces the occupied space while maintaining reliable sliding functionality.
Solution Approach 2:
The patent utilizes changes in magnetic field parameters (strength, direction, distribution) to control the sliding motion. By adjusting the excitation current to electromagnets and arranging permanent magnets with specific polarities, the magnetic force parameters are dynamically changed to achieve precise positioning of the front slider, replacing traditional mechanical parameter adjustments.
2Area of stationary object
If front elements are miniaturized to increase screen ratio, then more screen area is available, but the sliding mechanism becomes less reliable and more difficult to control
Solution Approach 1:
By replacing mechanical driving mechanisms with magnetic field-based actuation, the system achieves reliable control of miniaturized front elements. The magnetic forces provide precise and stable driving without the wear and clearance issues inherent in mechanical systems, ensuring reliable operation even with smaller component dimensions.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the driving system and the front slider. This intermediary enables contactless force transmission, providing stable and reliable actuation of miniaturized components without direct mechanical contact, thereby maintaining sliding reliability while allowing element miniaturization.
3Manufacturing precision
If complex mechanical sliding structures are used, then precise positioning can be achieved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces complex mechanical positioning structures with a magnetic field-based positioning system. By controlling the magnetic forces through electromagnets and permanent magnet arrangements, precise positioning is achieved without the complexity of mechanical linkages, reducing both device complexity and manufacturing difficulty.
Solution Approach 2:
The magnetic field-based driving system serves multiple functions: it provides driving force, positioning control, and stopping mechanism all through magnetic field manipulation. This multi-functionality eliminates the need for separate mechanical components for each function, thereby reducing overall device complexity while maintaining positioning precision.
4Productivity
If traditional magnetic driving structures are used, then sliding can be achieved, but magnetic force dispersion reduces efficiency
Solution Approach 1:
The patent introduces a non-magnetic shim as an intermediary component between the magnetic driving elements and the front slider. This shim serves as a magnetic force concentration channel, guiding and concentrating the magnetic field lines to act more effectively on the slider, thereby reducing magnetic force dispersion and improving sliding efficiency while reducing energy loss.
Solution Approach 2:
The non-magnetic shim creates a localized concentration of magnetic force lines in the region where they are most needed - between the magnetic bodies and the front slider. This local quality enhancement ensures that magnetic energy is efficiently transmitted to the slider rather than dispersing, improving productivity while reducing energy loss.
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 the front elements to be seamlessly integrated into the terminal design, enhancing screen ratio by allowing the slider to move between exposed and shielded positions automatically, reducing user effort and improving sliding stability and reliability compared to traditional mechanical solutions.
Implementation Method 1
a first magnetic body 121 provided with a coil 2212 and a soft magnetic body 2211 on which the coil 2212 is wound
Implementation Method 2
the first magnetic body 121 is an electromagnet 221
Implementation Method 3
a second magnetic body 130 including a first magnet 231 and a second magnet 232
Implementation Method 4
a non-magnetic shim disposed between the first magnetic body and the second magnetic body and configured to concentrate magnetic force lines
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A front assembly sliding structure includes: a front slider (120,220) provided with a first magnetic body (121,221), and a second magnetic body (130,230) disposed on a panel (110,210). The front slider is slidable relative to the panel, and the first magnetic body is opposite to the second magnetic body when the front slider is in a first position. The front slider is configured to slide from the first position to a second position when a force in a first direction is present between the first magnetic body and the second magnetic body, and configured to slide from the second position to the first position when a force in a second direction is present between the first magnetic body and the second magnetic body, the first direction being opposite to the second direction.