Press-Back Recliner Actuator for Precise Backrest Positioning
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Solution Overview
Problem
Conventional press-back recliner chairs lack advanced functionality and precise control over the reclining mechanism, limiting user convenience and adaptability.
Innovation Solution
A press-back reclining seating unit equipped with an electrically-powered linear actuator and a reclining mechanism that includes pivot links and bridging members, allowing the backrest to move between upright and fully reclined positions, with the ability to stop at any partially reclined position, enhancing user control and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electrically-powered linear actuator is added to a press-back chair, then user control and adaptability are improved, but device complexity increases
Solution Approach 1:
The patent replaces the traditional mechanical reclining mechanism with an electrically-powered linear actuator. The actuator uses an electric motor to drive a screw mechanism, converting electrical energy into precise linear motion that controls the backrest angle. This substitution eliminates complex mechanical linkages and provides more adaptable, electrically-controlled positioning.
Solution Approach 2:
The linear actuator serves multiple functions: it provides powered adjustment of the backrest, enables precise positioning at various angles, and can be integrated with control systems for automated operation. This single component replaces what would otherwise require multiple mechanical elements, achieving versatility while managing complexity.
2Manufacturing precision
If a linear actuator with pivot links and bridging members is used, then movement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The reclining mechanism is divided into distinct modular components: the linear actuator assembly, pivot links, upper bridging member, and lower bridging member. Each component can be manufactured and tested independently, then assembled together. This segmentation allows for precise manufacturing of individual parts while simplifying the overall production process through modular assembly.
Solution Approach 2:
The pivot links and bridging members serve as intermediary elements that translate the linear motion of the actuator into the rotational movement of the backrest. These intermediaries provide precise geometric relationships that ensure accurate positioning, while their simple linkages are easier to manufacture than complex direct-drive mechanisms.
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
Enables smooth and precise adjustment of the backrest to various reclined positions, improving user experience and adding functionality to press-back chairs by providing electrically powered control over the reclining mechanism.
Implementation Method 1
The reclining mechanism includes an electrically-powered linear actuator that enables the backrest to move between an upright position and a fully reclined position
Data Source
AI summary
A press-back style reclining seating unit includes: a frame configured to rest on an underlying surface; a seat fixed to the frame, the seat being generally horizontally disposed; a generally upright backrest positioned above the rear portion of the seat; and a reclining mechanism that interconnects the frame and the backrest and controls the movement of the backrest relative to the frame between an upright position, in which the backrest is generally vertically disposed, and a fully reclined position, in which the backrest is more reclined relative to the underlying surface than in the upright position. The reclining mechanism includes an actuating unit that enables the backrest to move to and remain in any partially reclined position between the upright and fully reclined positions.