Vehicle Headrest Adjustment Mechanism for High-Back Seat Support
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Solution Overview
Problem
Existing vehicle seat designs fail to adequately support the occipital region of passengers, leading to discomfort and increased risk of injury in collisions, particularly when high-back boards are used to enhance aesthetic appearance, as conventional mechanisms struggle to adjust the headrest position effectively.
Innovation Solution
A headrest position adjustment apparatus featuring an electric forward and backward driving mechanism and an electric upward and downward driving mechanism, mounted on a high-back board, allowing for convenient adjustment of the headrest's position across both directions, even when the high-back board is positioned higher than the seatback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a high-back board is mounted on the rear surface portion of the seatback to increase aesthetic appearance, then the aesthetic appearance of the seat is improved, but the headrest position adjustment becomes difficult or impossible with conventional mechanisms
Solution Approach 1:
The adjustment mechanism is divided into two independent motor-driven systems: a first motor for forward-backward adjustment and a second motor for upward-downward adjustment. This segmentation allows each mechanism to operate independently, enabling full adjustability despite the high-back board's presence.
Solution Approach 2:
The invention adds a vertical adjustment dimension by mounting a second motor inside the high-back board to move the headrest upward and downward. This transforms the adjustment capability from only horizontal (front-conventional mechanisms) to both horizontal and vertical dimensions, fully overcoming the high-back board's interference.
2Device complexity
If conventional forward-backward driving mechanisms are used to adjust headrest position, then the mechanism structure is simple, but the headrest cannot be properly adjusted when mounted on a high-back board
Solution Approach 1:
The adjustment apparatus achieves universal adaptability by providing both forward-backward and upward-downward adjustment capabilities through two motor systems. This multi-functional design allows the headrest to be positioned anywhere within a three-dimensional space, making it compatible with various seat designs including those with high-back boards.
3Shape
If the headrest is mounted on the front surface portion of the high-back board, then the aesthetic appearance is maintained, but the occipital region cannot be fully supported according to passenger's physical condition
Solution Approach 1:
The invention transforms the static headrest mounting into a dynamic, fully adjustable system. Two motors enable the headrest to move freely in forward-backward and upward-downward directions, allowing real-time adaptation to different passenger heights and preferences, thereby ensuring reliable occipital support for all passengers.
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 easy and convenient adjustment of the headrest's position, ensuring optimal support for passengers, enhancing comfort and safety by accommodating various passenger sizes and preferences while maintaining aesthetic appeal.
Implementation Method 1
a first motor mounted on the fixing frame, the first motor having a first lead screw facing forward as an output shaft
Implementation Method 2
a front link having a lower end portion of opposite sides thereof hinge-fastened to the fixing bracket
Implementation Method 3
a second motor mounted on the lower bracket so as to drive the arm screw forward and backward along a second lead screw
Data Source
AI summary
In an embodiment a headrest position adjustment system includes a housing mounted on a front surface portion of a high-back board, a headrest mounted on the housing, the headrest being capable of moving forward and backward, a fixing frame comprising slide holes in opposite side portions of the fixing frame, the fixing frame being mounted inside the housing, a first motor mounted on the fixing frame, the first motor having a first lead screw facing forward as an output shaft, and a side bracket disposed on each of the opposite side portions of the fixing frame and connected to the headrest, the side bracket being fastened to a slide hole such that the side bracket is capable of being moved forward and backward.