Foldable Display Support Cam Linkage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display supports become unstable and prone to falling when folded, as the gravity center shifts backward, causing instability during the folding process due to the screen being rotated to a horizontal state.
Innovation Solution
A foldable display support design that restricts the screen from rotating to a horizontal state when the support arm is in a standing position, using a linkage mechanism with cams and a limiting sheet to control the angle range, and includes a locking mechanism to prevent upward rotation during folding, ensuring the screen can be safely folded to a horizontal state by lowering the gravity center.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the screen is rotated to a horizontal state when the support arm is in a standing state, then the occupied space is reduced, but the gravity center shifts backward causing instability and potential falling
Solution Approach 1:
The patent applies dynamics by making the limiting mechanism conditional on the support arm's position. The limiting sheet is pushed by the cam mechanism to release the block part from the limiting part only when the support arm is in the folded state, dynamically adapting the screen's rotation freedom to the current configuration state, thereby preventing instability during standing operation while enabling compact folding.
Solution Approach 2:
The patent implements preliminary action by pre-positioning the block part of the limiting sheet to block the limiting part of the screen support rack before folding occurs. This preliminary blocking prevents the screen from rotating to a horizontal state when the support arm is standing, eliminating the instability risk before it can manifest. The cam mechanism ensures this blocking is released only after the support arm has been folded to the horizontal state.
2Stability of the object's composition
If the screen rotation is restricted to prevent instability, then stability is improved, but the ability to fold to horizontal state is reduced
Solution Approach 1:
The limiting mechanism dynamically adapts to the support arm's position through the cam-follower arrangement. When the support arm is folded horizontally, the cam rotates and pushes the limiting sheet away, releasing the block part to allow the screen to rotate to the horizontal folding state. When the support arm is standing, the cam position allows the block part to engage, restricting screen rotation to maintain stability. This dynamic behavior resolves the contradiction between stability and folding capability.
3Stability of the object's composition
If a limiting mechanism is added to control screen rotation, then stability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the limiting function with the existing hinge connection structure. The limiting sheet, block part, and cam mechanism are integrated into the upper hinge assembly that connects the screen support rack to the support arm. By combining the limiting function with the existing rotational connection, the patent avoids adding a separate limiting mechanism, thereby reducing the increase in device complexity while still achieving the stability improvement.
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 design prevents screen instability and falling by limiting the forward/backward tilt angle in the standing state and allows smooth, stable folding to a horizontal position, while also providing a tactile reminder for proper screen positioning and automatic unfolding.
Implementation Method 1
a first elastic member which is sleeved on the core shaft, the first cam and the second cam respectively have at least a protrusion, the limiting sheet has a block part which mutually blocks with the limiting part of the screen support rack, for limiting the screen to rotate within a first angle range; when the support arm is rotated through the lower hinge, the linkage mechanism links the first cam to rotate relative to the second cam, when the protrusion of the first cam and the protrusion of the second cam contact and abut against each other, the second cam axially moves and pushes the limiting sheet for enabling the block part of the limiting sheet to be released from the limiting part of the screen support rack
Data Source
AI summary
The present invention provides a foldable display support, wherein when a support arm is in a standing state, a limiting sheet is located in a limiting part of a screen support rack for blocking, so only the forward/backward tilted angle of a screen can be adjusted, thereby preventing being unstable and falling due to the gravity center being overly backward. When the support arm is folded to a horizontal state, the gravity center is lowered, and a protrusion of a first cam abuts a protrusion of a second cam, such that the second cam axially moves and pushes the limiting sheet to be released from the limiting part of the screen support rack, at this moment, the screen is enabled to be backwardly rotated and folded to a horizontal state for reducing the occupied space, thereby ensuring the folding process to be smooth and stable and preventing from falling.