Head Massager Adjustment Mechanism for Compact Fit
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Solution Overview
Problem
Conventional head massagers have a limited adjustable range and require multiple adjustment devices, making them less compact and less effective in accommodating various head sizes.
Innovation Solution
A head massager design featuring a helmet with a front and rear shell, where the rear shell has a shell cavity and the adjustment device includes a positive rotatable knob, a fixing pole, a winding ring, and pulling ropes, allowing for a larger adjustable range and enhanced massage effectiveness through air bags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two adjustment devices with gear rack mechanisms are used to adjust the helmet, then the helmet can be adjusted to fit different head sizes, but the structure becomes complex and the adjustable range is limited due to mutual constraints between the two devices
Solution Approach 1:
The patent merges two separate adjustment devices into a single adjustment device that controls both the first and second helmet bodies. The winding ring mechanism is connected to both helmet bodies through pulling ropes, allowing one adjustment operation to simultaneously adjust both bodies, thereby reducing structural complexity while maintaining adaptability
Solution Approach 2:
The patent segments the adjustment mechanism into independent winding ring, pulling ropes, and gear rack components. This segmentation allows the single adjustment device to independently control the first and second helmet bodies through separate pulling ropes, enabling a larger adjustable range without mutual constraints
2Adaptability or versatility
If two adjustment devices are used to provide adjustment functionality, then the helmet can accommodate various head circumferences, but the overall device size increases and compactness is reduced
Solution Approach 1:
The patent combines two adjustment devices into one integrated adjustment mechanism located at the rear end of the helmet. The winding ring and pulling ropes are arranged within the rear shell cavity, consolidating the adjustment functionality into a compact single unit that reduces overall device volume while maintaining the ability to fit various head sizes
Data Source
AI summary
A head massager comprises a helmet having a front shell and a rear shell moveable relative to the front shell, a massage device and an adjustment device having a positive rotatable knob, a fixing pole fixed on the rear shell, a winding ring, two pulling ropes and a reverse locking device. The rear shell has a cavity and the front shell has two ends plug-connected with two ends of the rear shell. The knob and the winding ring are loosely sleeved on the fixing pole via holes. The knob has first bulged teeth around a hole, the winding ring has a loop of second bulged teeth around another hole. The first bulged teeth are indented joined to the second bulged teeth. One end of each pulling rope is connected to the end of the front shell, another end of the pulling rope is connected to the winding ring to rotate the knob in positive direction for moving the front shell by the two pulling ropes.