Automobile Headrest Lateral Adjustment Sliding Shaft Mechanism
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Solution Overview
Problem
Existing automobile headrests lack effective lateral adjustment capabilities, limiting their adaptability to different users and comfort levels.
Innovation Solution
An automobile headrest design featuring a shell with rotating and sliding shafts, adjustable support arms, and a seat fixing mechanism with clamping teeth and elastic control, allowing for lateral movement and adjustment of the support arms to accommodate various users, enhanced by a locking structure and buckling device for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the support arm is fixed to the shell, then the structure is simple and stable, but the lateral adjustment capability is lost
Solution Approach 1:
The support arm is transformed from a fixed structure to a dynamic adjustable structure through the sliding shaft mechanism. The sliding shaft can move laterally within the shell along the slideway, allowing the support arm to adjust its position while maintaining structural integrity through the locking structure when adjustment is not needed.
Solution Approach 2:
The support arm assembly is segmented into movable components (sliding shaft, rotating shaft) and fixed components (shell, locking structure). This segmentation allows the sliding shaft to independently move laterally for adjustment while the locking structure remains fixed, resolving the contradiction between adjustability and structural simplicity.
2Adaptability or versatility
If the sliding shaft is allowed to move freely, then lateral adjustment is maximized, but positioning precision and stability are reduced
Solution Approach 1:
The locking structure is designed to preliminarily constrain the sliding shaft at specific positions before lateral movement occurs. The concave-convex parts are pre-positioned along the slideway to provide predetermined stopping points, ensuring positioning precision is maintained while allowing adjustment within a range.
Solution Approach 2:
The system transitions from a static fixed position to a dynamic adjustable position through controlled movement of the sliding shaft. The locking structure dynamically engages and disengages to allow movement when needed while maintaining precise positioning when locked, balancing adjustment range with positioning precision.
3Strength
If the fixing mechanism uses multiple clamping teeth, then the fixation strength is improved, but the complexity of the fixing part increases
Solution Approach 1:
Multiple clamping teeth on the sliding shaft are merged with corresponding clamping teeth on the locking structure to form an integrated fixing mechanism. The convex-concave parts of the locking structure engage with the clamping teeth simultaneously, providing multi-point fixation that increases strength while maintaining structural simplicity through the unified locking design.
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
The design provides improved lateral adjustment and comfort by allowing precise positioning of the support arms, enhancing user flexibility and stability, while maintaining ease of installation and adjustment.
Implementation Method 1
an elastic member (1511) and a pushing part (1512); one side of the elastic member is connected to the elastic member baffle (16) provided on the shell (1), and the other side thereof is connected to the pushing part (1512)
Implementation Method 2
the sliding shaft (5) slides in a slideway (11) inside the shell (1)
Implementation Method 3
each support arm (3) is provided with a rotating shaft (4) and a sliding shaft (5)
Data Source
Figure 1
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AI summary
The invention discloses an automobile headrest, comprising a shell, support arms, and a seat fixing part; the seat fixing part is arranged on the shell for fixing with the fixing rod on the automobile seat; each support arm is provided with a rotating shaft and a sliding shaft; the sliding shaft slides in a slideway inside the shell; one end of the sliding shaft is rotatably connected to the rotating shaft through a rotating structure; the support arm is slidably installed in the shell through the sliding shaft; the width between the support arms is adjusted laterally through the sliding shaft. The invention realizes the distance adjustment between the support arms through the lateral movement of the sliding shaft, realizes a better lateral adjustment of the sliding shaft through the design of the locking plate, the concave-convex part and the like, and realizes a better degree of freedom and comfort.