Vehicle Leg Rest Linkage for Lower-Complexity Panel Motion
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Solution Overview
Problem
Existing leg rest apparatuses for vehicles have a complex structure due to six-axis articulated link motion, increasing the number of components and weight, which limits their application to high-grade vehicles and compromises support quality.
Innovation Solution
A leg rest apparatus with a simplified four-axis articulated link motion system, utilizing a lift link, guide links, and springs to adjust the leg rest panel between deployed and stored positions, reducing the number of components and weight while enhancing support quality by allowing further downward movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If six-axis articulated link motion is used to adjust the leg rest panel, then the leg rest panel can be adjusted between stored and deployed positions, but the number of components is increased and the structure becomes complex
Solution Approach 1:
The patent combines multiple link members into an integrated link assembly where the first and second link members work together with the leg rest panel to form a unified mechanism. This merging reduces the number of separate components while maintaining the adjustment functionality between stored and deployed positions.
Solution Approach 2:
The link members are designed to perform multiple functions: they provide structural support, enable adjustment between positions, and work with the guide member to control the adjustment path. This multi-functionality reduces the need for additional specialized components.
2Ease of operation
If six-axis articulated link motion is used to adjust the leg rest panel, then the leg rest panel can be adjusted between stored and deployed positions, but the weight of the apparatus is increased
Solution Approach 1:
By merging multiple link members into a more integrated structure, the patent reduces the total amount of material required and eliminates redundant components, thereby decreasing the overall weight of the leg rest apparatus while maintaining adjustment capability.
3Ease of operation
If the leg rest panel is adjusted based on rotational motion of multiple link members, then the leg rest panel can be positioned, but the number of components is increased
Solution Approach 1:
The patent merges the first and second link members into a coordinated assembly that works together with the leg rest panel, reducing the number of separate components. The guide member further integrates the motion control function, eliminating the need for additional independent positioning mechanisms.
4Device complexity
If automatic link device with motor is used, then the link structure is simplified and marketability is improved, but the cost is high and it is applied only to limited high-grade vehicles
Solution Approach 1:
The manual adjustment mechanism is designed to be self-operating through the coordinated motion of the link members and guide member, eliminating the need for motors or powered assistance. This self-service approach reduces manufacturing costs while maintaining a simplified structural 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 simplified structure reduces the number of components and weight, decreases operating force, and improves support quality by allowing the leg rest panel to be positioned further downward, enhancing passenger comfort and operational stability.
Implementation Method 1
a lift link 20 having a rear end rotatably coupled to the seat and a front end rotatably coupled to the leg rest panel, configured to articulation between the front end and the rear end
Implementation Method 2
a front guide link having a front end rotatably connected to a first coupling portion of the leg rest panel and a rear end rotatably connected to the link base and a rear guide link... when the leg rest panel is adjusted from the stored position to the deployed position, the leg rest panel may be adjusted while rotating by a difference in trajectory between the front guide link and the rear guide link
Data Source
AI summary
A leg rest apparatus is provided. A leg rest panel is configured to be adjusted between a deployed position and a stored position. The apparatus includes a lift link that articulates a rear end and a front end rotatably coupled to the seat and the leg rest panel, respectively. A link base with a rear end fixed to the seat is separated from the lift link and a front end is disposed toward a front side of the seat. A front guide link with a front end and a rear end is rotatably connected to a first coupling portion of the leg rest panel and the link base, respectively. A rear guide link with a length less than the front guide link and a front end and a rear end rotatably connected to a second coupling portion separated from the first coupling portion and the link base, respectively.