Integral Seat Headrest Locking Structure With Hidden Guide Rods
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Solution Overview
Problem
Conventional vehicle seats have visually unappealing and unsafe headrest designs with exposed guide rods, and their locking/unlocking devices are prone to damage and difficult to manipulate.
Innovation Solution
A headrest adjustment device for integral vehicle seats that integrates the headrest and seat backrest, featuring a compact structure with a simple locking/unlocking mechanism that allows adjustment in forward/backward and up/down directions by pressing a button, utilizing a guide rod, guide rod sleeve, and a locking/unlocking device with a button, locking guide plate, and unlocking plate to switch between locked and unlocked states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the headrest and seat backrest are separated with an exposed guide rod, then the headrest can be adjusted, but the visual appearance deteriorates and safety decreases
Solution Approach 1:
The guide rod is nested within the guide rod sleeve, which is integrated into the seat backrest structure. The headrest moves along the hidden guide rod through the telescopic connection, concealing the guide rod from view while maintaining adjustability functionality.
Solution Approach 2:
The headrest support structure is merged with the seat backrest through the guide rod sleeve integration. The locking/unlocking device is also integrated into this combined structure, creating a unified assembly that improves visual appearance while preserving functionality.
2Ease of operation
If the locking/unlocking device moves along the headrest, then the headrest can be adjusted, but the device becomes easily damaged and structure becomes complex
Solution Approach 1:
The locking/unlocking function is segmented from the moving headrest assembly and placed in a fixed position on the seat backrest. The locking guide plate remains stationary while the operating rod transmits motion through the telescopic connection, separating the locking mechanism from the moving components.
Solution Approach 2:
The operating rod acts as an intermediary that transmits the locking/unlocking motion from the fixed locking device to the moving headrest support. This mediator allows the locking mechanism to remain stationary while still controlling the movable headrest position.
3Reliability
If the button must be continuously pressed during adjustment, then the locking/unlocking device can control headrest movement, but manipulation becomes difficult and time-consuming
Solution Approach 1:
The button operation is transformed from continuous pressing to periodic action. Pressing the button once triggers the locking guide plate to move laterally, which automatically engages or disengages the latch from the latch groove through the telescopic connection, achieving locking or unlocking in a single discrete action.
Solution Approach 2:
The locking/unlocking mechanism performs the locking action automatically through the telescopic connection between the operating rod and locking guide plate. Once the button is pressed and the guide plate moves laterally, the system self-completes the locking or unlocking operation without requiring continuous user input.
Data Source
AI summary
A headrest adjustment device for an integral vehicle seat for adjusting a position of a headrest in a forward and backward direction or an up and down direction, includes a headrest support, a locking/unlocking device, an operating rod, a latch plate, a pad connecting portion, a front and rear guide member, a front and rear locking pin, a locking pin spring, two guide rod sleeves, two guide rods, and a stopper. When a button is pressed in a locked state, the locking guide plate moves to one side to be in an unlocked state and maintains the unlocked state, when the button is pressed again, the locking guide plate returns from the unlocked state to an initial position, and the locking pin spring pushes the front and rear locking pin to the other side to return to a locked position thereof.