Electric Bed Ejector Linkage for Parallel Motion and Massage
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Solution Overview
Problem
Existing electric bed ejector mechanisms suffer from user discomfort due to non-parallel movement, pinching, and reduced mattress lifespan caused by curvilinear motion, lacking effective massage functions.
Innovation Solution
A reciprocating ejector mechanism with a linkage system comprising connecting rods and a driving device, allowing the ejected part to move parallel to the bed board, incorporating a rotating or linear motor for smooth vertical motion and massage functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a curvilinear ejector mechanism is used, then the ejected part can achieve positioning function, but the movement is not parallel to the bed board causing poor user experience and pinching
Solution Approach 1:
The patent applies the reverse of this principle by using straight-line motion instead of curvilinear motion. The ejector mechanism is designed to move along a straight line parallel to the bed board surface, eliminating the curvilinear path that causes pinching and poor user experience.
Solution Approach 2:
The patent introduces a parallel linkage mechanism as an intermediary structure that converts the rotational motion of the motor into straight-line parallel motion of the ejected part. This linkage system ensures the ejected part moves parallel to the bed board without pinching.
2Reliability
If a curvilinear ejector mechanism is used, then the positioning function is achieved, but the mattress is scraped shortening its service life
Solution Approach 1:
The patent eliminates curvilinear motion that causes mattress scraping by designing a straight-line motion path for the ejected part. The parallel linkage mechanism ensures the ejected part moves vertically without lateral scraping motion, thereby extending mattress service life.
3Adaptability or versatility
If a simple hinge and push rod structure is used, then the structure is simple, but the massage function is not achieved
Solution Approach 1:
The patent applies multi-functionality by designing the ejector mechanism to perform both positioning and massage functions. The parallel linkage mechanism enables controlled reciprocating motion that can provide massage while maintaining structural simplicity through the use of basic linkage components.
Solution Approach 2:
The patent introduces dynamic reciprocating motion capability through the parallel linkage mechanism, allowing the ejected part to move back and forth in a controlled manner. This dynamic motion enables massage function while maintaining relatively simple structure compared to more complex actuation systems.
4Ease of operation
If the ejected part moves in a curve, then the ejector mechanism can be compact, but the movement is not parallel to the bed board reducing comfort
Solution Approach 1:
The patent deliberately avoids curvilinear motion paths by designing a straight-line parallel motion system. The parallel linkage mechanism constrains the ejected part to move in a straight line parallel to the bed board surface, ensuring comfort while achieving compact design through efficient use of space.
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
Enhances user experience with improved stability and comfort by preventing mattress scraping and extending its lifespan through straight-line motion and integrated massage functions.
Implementation Method 1
The driving device is a linear motor, which matches the slider so that the slider moves the guide bar to drive the ejector mechanism
Implementation Method 2
The driving device is a rotating motor, which is arranged on the hinge joint between the second connecting rod and the bed board (frame), to rapidly drive the ejected part to reciprocate up and down
Data Source
AI summary
A reciprocating ejector mechanism for an electric bed comprising an aperture formed on a bed board. An ejector mechanism is mounted in the aperture. The ejector mechanism includes an ejected part, which is arranged parallel to the bed board. At least one first connecting rod with one end is connected with the ejected part and another end is hinged with a slider. The slider may slide along the guide bar fixed on the bed board. A second connecting rod with one end can be hinged with the middle part of the first connecting rod and another end hinged with the bed board. The ejector mechanism may have a driving device fixed on the bed board and connected with the linkage to drive the first connecting rod to rotate, so that the ejected part is driven to move parallel to the bed board.