Control Knob Device with Nested Spring Return Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional control knob devices with complex structures occupy significant space and increase manufacturing costs and assembly time due to their intricate designs.
Innovation Solution
A compact control knob device with a simple assembling structure featuring a main body with guiding recesses and sliding slots, a shell with inserting slices, and a spring element that provides resilient force for automatic return, allowing for efficient space utilization and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional control knob structure with shaft and pusher member is used, then fine and coarse adjustment control is achieved, but the device occupies significant space and has complex assembly structure
Solution Approach 1:
The control knob is divided into distinct functional segments: a rotating shell for control input, a spring element for return force, and integrating ribs for structural connection. This segmentation allows each component to perform its specific function efficiently while reducing overall complexity and space requirements compared to conventional shaft-based designs.
2Ease of operation
If a conventional control knob structure with shaft and pusher member is used, then fine and coarse adjustment control is achieved, but manufacturing cost and assembling time increase
Solution Approach 1:
Multiple functions are merged into fewer components. The shell integrates both control rotation and structural support functions. The spring element combines return force generation with positional registration. The integrating ribs merge connection and alignment functions. This merging reduces the number of parts requiring manufacturing and assembly, thereby reducing cost and time.
Solution Approach 2:
The spring element automatically provides the return force to reset the control knob after rotation, eliminating the need for additional actuators or complex reset mechanisms. The integrating ribs self-align and self-secure the shell to the main body during assembly, reducing assembly complexity and time.
3Volume of moving object
If a compact design is implemented, then space occupancy is reduced, but structural complexity may increase
Solution Approach 1:
The spring element is nested within the cavity of the main body, with its ends engaging features on the main body and shell. The integrating ribs are nested within corresponding recesses on the main body. This nesting arrangement achieves compactness by utilizing internal spaces while maintaining clear, straightforward assembly sequences that do not increase structural complexity.
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 solution results in a compact, easy-to-assemble control knob device that reduces manufacturing costs and space occupancy while maintaining functional adjustability.
Implementation Method 1
a spring element (30) assembled to the main body (10). The spring element (30) has two ends extending apart from each other with a predetermined distance. When the shell (20) is rotated along different directions for achieving the adjustive function, the deformed spring element (30) can provide the resilient force to make the rotated shell (20) return automatically
Data Source
AI summary
A control knob device has a main body defining a top surface having a ring-shaped stopping wall with two inserting openings formed thereon, and a lateral surface having a guiding recess extending upwards and downwards and a sliding slot running circumferentially and communicating with the guiding recess, with the depth thereof greater than that of the guiding recess. A shell coupled to the main body has a covering plate with two blocking portions located outside the stopping wall and adjacent to the inserting openings, and a lateral plate extending inwards to form an inserting slice corresponding to the sliding slot. The shell is coupled to the main body by the inserting slice passing through the guiding recess and inserted into the sliding slot. Two elastic ends of a spring element are inserted into the inserting openings and abut against the blocking portions for making the rotated shell return automatically.