Sofa shelf
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Solution Overview
Problem
Conventional sofa shelves lack a secure mechanism to hold mobile devices like phones and tablets, leading to arm strain and instability, as they cannot fix the devices in place, causing them to be easily dropped from the armrest.
Innovation Solution
A sofa shelf design featuring a rotatable support member with a placing groove for device positioning, clamping members for secure attachment to the armrest, and a locking mechanism to prevent dropping, along with anti-slip layers for stability, allowing 360-degree adjustment and secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple storage tray is placed on the sofa armrest, then the structure is simple and easy to manufacture, but the mobile device cannot be fixed and is easily dropped
Solution Approach 1:
The device is divided into multiple functional modules: a clamping mechanism with first and second clamping members for securing to the armrest, a support member with placing groove for the mobile device, and a receiving groove for food items. This segmentation allows each component to perform its specific function while maintaining overall structural simplicity
Solution Approach 2:
The first and second clamping members are rotatably connected to the main body, allowing them to rotate between a clamping state (secured to armrest) and a storage state (folded against the main body). This dynamic capability enables the device to adapt between providing secure attachment and minimizing space occupation
2Reliability
If the storage tray is made detachable for easy placement, then the ease of operation is improved, but the limiting structure is weakened and the tray is more easily dropped
Solution Approach 1:
The clamping members are designed to rotate between clamped and unclamped positions, allowing users to easily attach and detach the device from the armrest by simply rotating the members, while maintaining secure attachment when clamped
Solution Approach 2:
The clamping mechanism is designed to be operated by hand without additional tools, allowing users to easily attach and detach the device themselves. The rotational movement of the clamping members provides intuitive feedback for proper attachment
3Reliability
If no clamping mechanism is used to simplify the structure, then the device complexity is reduced, but the shelf is easily dropped from the armrest
Solution Approach 1:
The attachment function is segmented into separate clamping members that can be independently positioned and adjusted, rather than using a single complex clamping structure. This allows for reliable attachment while keeping each individual component simple
Solution Approach 2:
The rotatable clamping members provide a dynamic attachment mechanism that adapts to different armrest shapes and sizes, ensuring reliable attachment across various surfaces while maintaining structural simplicity through standardized rotational joints
4Adaptability or versatility
If the support member is made fixed to provide stable device positioning, then the stability is improved, but the adaptability for different viewing angles is reduced
Solution Approach 1:
The support member is rotatably connected to the main body, allowing it to rotate and adjust the mobile device to different viewing angles while maintaining stable positioning at each angle through friction or gravity. This dynamic capability provides both adaptability and stability
Data Source
AI summary
A sofa shelf includes a main body, a support member, a first clamping member, and a second clamping member. The main body is provided with a first surface and a second surface opposite to the first surface. The main body is further provided with a receiving groove located on the first surface. The support member is disposed on the first surface and is movably connected to the main body. The support member is provided with a placing groove arranged obliquely relative to the horizontal plane. Both the first clamping member and the second clamping member are disposed on the second surface. The first clamping member and the second clamping member are rotatably connected to the main body, respectively. Rotation directions of the first clamping member and the second clamping member are opposite.