Four-direction adjustable seat headrest and assembly method
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Solution Overview
Problem
Existing seat headrests face issues with complex unlocking mechanisms, high costs, and inadequate X-direction adjustment, particularly in four-direction adjustable systems.
Innovation Solution
A four-direction adjustable seat headrest with a simple structure featuring locking and unlocking components mounted on headrest support rods, utilizing locking and unlocking steel wires embedded in locking slots, driven by an unlocking means, allowing for stable locking and unlocking, and facilitated by an assembly method that includes steps for mounting these components on the rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a U-shaped locking block with plastic coating is used, then the locking mechanism is stable, but the cost increases and the structure becomes complicated
Solution Approach 1:
The patent replaces the expensive plastic-coated U-shaped locking block with a simple metal locking piece that has a straight or bent shape. This locking piece is easier and cheaper to manufacture, while still achieving reliable locking when combined with the specially designed locking slot structure that includes a limiting wall and blocking wall.
Solution Approach 2:
The locking mechanism is divided into separate functional elements: the locking piece with through hole, the locking slot with limiting wall and blocking wall, and the steel wire. This segmentation allows each component to be simple and easy to manufacture, while their combination provides stable locking functionality.
2Reliability
If a complex unlocking mechanism with multiple components is used, then the locking is stable, but the assembly becomes difficult and cost increases
Solution Approach 1:
The patent combines the locking and unlocking functions into a simple integrated mechanism. The locking piece with its through hole works directly with the steel wire to provide both locking and unlocking capabilities. The unlocking groove in the locking slot allows the locking piece to be easily manipulated by the steel wire for quick locking and unlocking operations.
3Device complexity
If traditional locking mechanisms are used, then the structure is simple, but the X-direction unlocking mode is ineffective
Solution Approach 1:
The locking slot is designed with asymmetric features including a limiting wall and a blocking wall positioned at specific locations. This asymmetric structure enables the locking piece to engage securely in the locked position while allowing easy extraction in the unlocking direction. The through hole in the locking piece aligns with the unlocking groove in the locking slot to facilitate X-direction unlocking motion.
4Adaptability or versatility
If multiple adjustment mechanisms are combined, then four-direction adjustment is achieved, but the overall structure becomes complicated
Solution Approach 1:
The locking piece serves multiple functions: it provides locking engagement, enables unlocking through its through hole, and works with the steel wire for both locking and unlocking operations. The locking slot with its limiting and blocking walls provides both structural support and locking guidance. This multi-functionality reduces the need for separate components for each function.
Data Source
AI summary
A four-direction adjustable seat headrest and an assembly method, comprising a headrest rod (100) and a headrest body, wherein the headrest rod (100) is provided with a pair of headrest supporting rods (110a, 110b) for supporting the headrest body; and locking slots (111a, 111b) for locking the headrest body are provided at intervals in each of the headrest supporting rods (110a, 110b) ; further comprising first and second locking and unlocking components (500a, 500b), which are configured to lock the headrest body to the pair of headrest supporting rods (110a, 110b) and can adjust the headrest body on the pair of headrest supporting rods (110a, 110b), wherein the first and second locking and unlocking components (500a, 500b) are mounted on the pair of headrest supporting rods (110a, 110b), and the first and second locking and unlocking components (500a, 500b) are locked to or unlocked from the pair of supporting rods (110a, 110b) by means of locking and unlocking steel wires (510a, 510b) mounted therein, wherein when locking, the locking and unlocking steel wires (510a, 510b) are embedded into the locking slots (111a, 111b) in the pair of headrest supporting rods (110a, 110b), when unlocking, the locking and unlocking steel wires (510a, 510b) exit from the locking slots (111a, 111b) in the pair of headrest supporting rods (110a, 110b), the locking and unlocking steel wires (510a, 510b) in the first and second locking and unlocking components (500a, 500b) are unlocked, as driven by an unlocking means (600) mounted on the first and second locking and unlocking components (500a, 500b).