Shampoo Chair Linkage for Horizontal Recline and Neck Support
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Solution Overview
Problem
Previous shampoo chairs face difficulties in maintaining an adequate distance between the neck rest and seating plate due to variations in seating height, causing discomfort, especially for older or weaker individuals, as the neck structure is pulled downward by the center of gravity.
Innovation Solution
A sitting-type shampoo chair design featuring an inverted U-shaped leg frame configuration with a rotation lever system that applies weight force to the chair back, allowing the upper body to tilt closer to horizontal, thereby creating a more comfortable shampooing position by adjusting the chair support through a loader mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the chair back is made slanted and horizontal by motor operation, then the shampooing position is adjusted, but the structure becomes complex and requires motor control
Solution Approach 1:
The chair back automatically tilts to a horizontal position when the client sits down, using the client's body weight as the driving force. This eliminates the need for motor control or manual operation, as the system serves itself through gravitational force and mechanical linkage.
Solution Approach 2:
The patent replaces the motor-driven mechanical system with a passive mechanical system that uses gravity and leverage. The chair back tilts automatically through a hinge mechanism and counterweight system, substituting complex motor control with simple mechanical principles.
2Device complexity
If the neck rest is positioned closer to the seating plate, then the structure is simplified, but the neck structure is pulled downward by center of gravity causing discomfort
Solution Approach 1:
The patent introduces a counterweight mechanism that offsets the downward pull of gravity on the client's neck. The chair back tilts horizontally to create a counterbalancing force that supports the neck weight, preventing the neck from being pulled downward while maintaining structural simplicity.
Solution Approach 2:
The chair back is designed to be dynamic, tilting from a slanted position to a horizontal position when the client sits. This dynamic adjustment allows the neck rest to maintain an optimal distance from the seating plate, adapting to the client's weight and position to prevent neck strain.
3Ease of operation
If the chair support is raised up with foot support, then the seating height is adjusted, but the structure becomes more complex
Solution Approach 1:
The foot support mechanism automatically raises the chair support to the appropriate height when the client steps on it, using the client's body weight as the driving force. This eliminates the need for manual height adjustment mechanisms or complex control systems.
Solution Approach 2:
The patent replaces complex motorized or manual height adjustment mechanisms with a simple mechanical lever system. The foot support acts as a lever that translates the client's stepping force into vertical movement of the chair support, using basic mechanical principles instead of complex systems.
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 chair provides a more comfortable shampooing experience by ensuring the body remains closer to horizontal, alleviating the strain on the neck and improving comfort for users, regardless of their seating height or strength.
Implementation Method 1
A sitting-type shampoo chair design featuring an inverted U-shaped leg frame configuration with a rotation lever system that applies weight force to the chair back
Data Source
AI summary
A shampoo chair having a seat is provided. When a back of the chair is pushed backwards, a leg support is concurrently lifted up in conjunction with the back of the chair such that a client washing his or her hair can receive a shampoo service in a more comfortable way.