Mobile Device Stand Pivoting Mechanism with Grooved Sleeve
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Solution Overview
Problem
Conventional mobile device stands suffer from poor stability and inconvenient angle adjustment due to large gaps between pins and pivoting holes, causing devices to shift during angle adjustments.
Innovation Solution
A pivoting mechanism featuring a rotating shaft and fixing sleeve with grooves and a jagged end face, which provides a stable connection and easy angle adjustment through interference fit, preventing device shifting and enhancing usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional support stand with pin and pivoting holes is used, then the structure is simple, but the gap between pin and pivoting holes causes poor support stability and device shifting
Solution Approach 1:
The pivoting positioning piece is divided into separate components: a rotating shaft and a fixing sleeve with grooves. The fixing sleeve is segmented with multiple grooves that allow it to expand and contract, enabling precise positioning while maintaining stability. This segmentation resolves the contradiction by creating a stable connection without requiring an overly complex integrated structure.
Solution Approach 2:
The fixing sleeve is inserted into the pivoting hole, and the rotating shaft passes through the fixing sleeve. This nested arrangement allows the rotating shaft to rotate within the fixing sleeve while the grooves on the sleeve provide friction-based positioning. The nesting resolves the contradiction by achieving stable support through the interference fit between components rather than relying on a simple pin-hole connection.
2Ease of manufacture
If the gap between pin and pivoting holes is large, then the structure is easy to manufacture, but the mobile device shifts to the left or right during angle adjustment
Solution Approach 1:
The fixing sleeve's grooves change the physical parameters of the connection by allowing the sleeve to expand and contract. When the rotating shaft is inserted, the grooves compress the sleeve material, creating an interference fit that eliminates gaps. This parameter change resolves the contradiction by achieving precise pivot positioning without requiring extremely tight manufacturing tolerances on the pivot hole itself.
Solution Approach 2:
The fixing sleeve acts as an intermediary component between the rotating shaft and the pivoting hole. Instead of directly connecting the shaft to the hole with a pin, the sleeve mediates the connection through its expandable grooves, which provide friction-based positioning. This intermediary resolves the contradiction by achieving precise positioning through the sleeve's material deformation rather than relying solely on precise hole dimensions.
3Adaptability or versatility
If the position of the support rod is frequently adjusted, then the stand is adaptable to different angles, but the adjustment process is inconvenient for users
Solution Approach 1:
The rotating shaft can rotate freely within the fixing sleeve, allowing dynamic adjustment of the support angle. The grooves on the sleeve provide friction that maintains positioning at any angle while allowing smooth rotation during adjustment. This dynamic design resolves the contradiction by enabling convenient angle adjustment without requiring discrete positioning holes or complex locking mechanisms.
Solution Approach 2:
The friction between the rotating shaft and the grooved fixing sleeve provides self-positioning and self-locking functionality. As the user rotates the shaft to adjust the angle, the grooves naturally provide friction-based positioning that holds the angle in place without requiring additional locking mechanisms. This self-service feature resolves the contradiction by making angle adjustment convenient while maintaining stable positioning at any desired angle.
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 mechanism ensures stable support and convenient angle adjustment for mobile devices by securely fixing the flipping cover to the support, preventing device shifting and improving user experience.
Implementation Method 1
angle adjustment and pivot positioning between the flipping cover and the support are realized through interference fit between the rotating shaft and the fixing sleeve
Implementation Method 2
One end of the fixing sleeve inserting into a corresponding pivoting hole of the flipping cover has a jagged end face
Data Source
AI summary
A stand for a mobile device includes a support, a flipping cover embedded in a middle portion of the support, and a pivoting mechanism pivoting the support and the flipping cover. Two sides of the support and two sides of the flipping cover define pivoting holes configured to mount the pivoting mechanism. The pivoting mechanism includes at least one pivoting positioning piece arranged on one side of the support. The at least one pivoting positioning piece includes a rotating shaft and a fixing sleeve. The fixing sleeve is arranged in a corresponding pivoting hole of the flipping cover. A first end of the rotating shaft is embedded in a corresponding pivoting hole of the support. A second end of the rotating shaft is embedded in the fixing sleeve. A plurality of grooves is defined on the fixing sleeve. One end of the fixing sleeve has a jagged end face.