Vehicle Seat Height Link Anti-Rotation Mechanism
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Solution Overview
Problem
In vehicle seats with height adjustment devices, the inner seat cushion frame is not adequately restricted from rotating during collisions, leading to passenger unbalance and injury due to the lack of a specific mechanism for rotation restriction.
Innovation Solution
A safety apparatus comprising a height link and a restriction link with anti-rotation mechanisms, including a link locking gear and a guide pin, that restricts the rotation of the inner seat cushion frame in both front and rear collisions, preventing unbalance between the inner and outer sides of the seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a height adjustment device is installed only on the outer seat cushion frame, then the outer frame can adjust height, but the inner seat cushion frame lacks rotation restriction mechanism causing collision injury
Solution Approach 1:
The invention divides the seat cushion frame into inner and outer frames with separate rotation restriction mechanisms. The outer frame has the height adjustment device, while the inner frame has a dedicated rotation restriction mechanism using a link, restrictor, and spring assembly, allowing each frame to be optimized independently for its specific function
Solution Approach 2:
The invention introduces a link connecting the inner seat cushion frame to the seat rail bracket, with a restrictor and spring assembly acting as intermediary components. This intermediary mechanism transfers and restricts rotation forces on the inner frame during collisions, protecting the passenger without interfering with the height adjustment function of the outer frame
2Ease of operation
If the inner seat cushion frame is connected rotatably to allow height adjustment, then height flexibility is improved, but rotation during collision causes passenger unbalance and injury
Solution Approach 1:
The invention uses a dynamic rotation restriction mechanism with a spring assembly that allows normal rotational movement for height adjustment but restricts excessive rotation during collisions. The spring provides flexible restraint that adapts to different operating conditions, permitting ease of adjustment during normal use while preventing harmful rotation during impact
Solution Approach 2:
The restrictor and spring assembly are pre-installed on the inner seat cushion frame to provide preliminary anti-rotation action before collision occurs. This pre-positioned restriction mechanism is ready to counteract harmful rotation forces immediately upon collision, preventing passenger unbalance and injury
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
Effectively restricts the rotation of the inner seat cushion frame during collisions, thereby preventing passenger unbalance and enhancing safety by maintaining balance between the inner and outer sides of the seat.
Implementation Method 1
a spring (50) that may have one end supported by the seat rail bracket (9) and the other end supported to the restriction link (30), and provides the restriction link (30) with an elastic force
Data Source
AI summary
A safety apparatus of a seat for a vehicle with a height adjustment device may include a height link that has one end rotatably connected to a seat rail bracket and the other end fixed to a rear hinge pipe, a restriction link that may be disposed at a side of the height link and has one end pivotally coupled to the seat rail bracket, wherein the restriction link may be elastically biased away from the height link, a first anti-rotation mechanism that may be disposed at the height link and the restriction link to restrict rotation of the height link when a front of the height link rotates upward in a front collision, and a second anti-rotation mechanism that may be disposed at the height link and the restriction link to restrict rotation of the height link when a rear of the height link rotates upward in a rear collision.