Massage Rocker Arm Assembly With Eccentric Wheel Constraint
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Solution Overview
Problem
Existing massage apparatuses have complex structures and difficult assembly processes due to the need for intricate components like eccentric wheels, eccentric shafts, and guide grooves, which compromise structural strength and assembly efficiency.
Innovation Solution
A massage apparatus design featuring a drive unit, transmission unit, and massage units with eccentric wheels and limiting grooves that allow for simplified assembly and a compact structure, utilizing limiting columns and grooves to control the movement of rocker arms, eliminating the need for guide grooves and enhancing structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If small massage arms are equipped with independent eccentric wheels, eccentric shafts and elongated through holes for oscillation and position limitation, then the massage function is achieved, but the structure becomes complicated and assembly becomes difficult
Solution Approach 1:
The patent combines the eccentric wheel and eccentric shaft into a single integrated eccentric wheel component. The rocker arm directly rotates on the eccentric wheel without requiring separate eccentric shafts, elongated through holes, or guide grooves. This merging of components achieves the oscillation and position limitation functions while significantly simplifying the structure and facilitating assembly.
2Ease of operation
If arc-shaped guide grooves are provided on massage arms for position limitation, then the position control is achieved, but the structural strength is reduced and assembly becomes difficult
Solution Approach 1:
The patent extracts and eliminates the arc-shaped guide groove from the rocker arm structure. Instead of cutting grooves into the rocker arm (which weakens it), the position control function is achieved by having the rocker arm rotate on the external eccentric wheel with limiting columns constraining the motion path. This removes the harmful guide groove while maintaining position control.
3Ease of operation
If multiple independent components are used for oscillation and position limitation, then the massage motion is achieved, but the assembly process becomes time-consuming and complex
Solution Approach 1:
The patent merges multiple independent components (eccentric wheel, eccentric shaft, guide grooves, limiting mechanisms) into a simplified integrated structure where the rocker arm directly rotates on the eccentric wheel. The limiting columns and limiting grooves provide position control without requiring separate complex assemblies. This dramatically reduces the number of parts and assembly steps, improving productivity.
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 design achieves a more compact and robust structure with simplified assembly, ensuring efficient operation and improved massage performance by synchronizing shoulder and neck massages through synchronized oscillation of rocker arms.
Implementation Method 1
a first limiting groove, formed below the transmission shaft, is provided for each of said plurality of first massage units; the first limiting column of each of said plurality of first massage units is inserted into a respective first limiting groove, such that the first limiting column is vertically movable in the first limiting groove but limited from moving back and forth in the first limiting groove along the front-rear direction
Implementation Method 2
each of two sides of the transmission shaft is fixed with at least one first eccentric wheel; each of said plurality of first massage units comprises a first rocker arm extending forward towards a front side of the massage apparatus, a first massage head installed at a front end of the first rocker arm, and a first connection sleeve hole formed at a rear end of the first rocker arm; the first connection sleeve hole rotatably receives a corresponding first eccentric wheel
Data Source
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AI summary
A massage apparatus. First massage units (5) and second massage units (6) are connected to a transmission shaft (43) respectively and swing by means of the rotation of the transmission shaft (43); the transmission shaft (43) extends from left to right and a first eccentric wheel (44) is fixedly provided on corresponding one side of the transmission shaft (43); each first massage unit (5) comprises a first rocker arm (51) extending forwards; a first massage head (52) is mounted at the front end of the first rocker arm (51); a first connecting sleeve hole (53) is formed in the rear end of the first rocker arm (51); the first connecting sleeve hole (53) is rotatably combined with a corresponding first eccentric wheel (44); a first limiting column (54) extends downwards from the bottom of the rear end of each first rocker arm (51); the first limiting column (54) moves up and down and is limited in a front-back direction, and is inserted into a first limiting slot (71) below the transmission shaft (43); and the depth of the first limiting slot (71) allows the first limiting column (54) to move up and down. The massage apparatus has a simple structure, can ensure the structural strength of the first rocker arms (51), and is convenient and quick to assemble.