Elevator Car L-Shaped Backrest Handrail for Extended Downtime
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Solution Overview
Problem
Elevator cars lack a handrail design that provides enhanced comfort and safety for passengers, particularly during unplanned extended downtimes, and existing handrails do not adequately support the passenger's back or offer a comfortable leaning surface.
Innovation Solution
The elevator car incorporates a handrail designed as a backrest with a high leaning surface, adjustable height, and ergonomic incline, covered with textile material, which can also serve as a crash pad and provides a handle area for support, integrated with the car walls to form a comfortable seating area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional handrails are used, then the basic safety function is provided, but passenger comfort during extended downtimes is insufficient
Solution Approach 1:
The handrail is designed to serve multiple functions: it acts as a traditional handhold for safety, provides a comfortable backrest for prolonged waiting periods, and creates a lounge-like seating area. This multi-functionality allows the same structure to address both safety requirements and comfort needs during extended downtimes
2Ease of operation
If the handrail is designed with a high leaning surface, then passenger comfort is improved, but the device complexity increases
Solution Approach 1:
The handrail structure merges the handhold function with the backrest function into a single integrated component. The leaning surface is incorporated directly into the handrail body, eliminating the need for separate seating structures and reducing overall device complexity while maintaining enhanced comfort
3Ease of operation
If the handrail is inclined relative to the vertical, then ergonomic comfort is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The handrail is designed with a specific inclination angle parameter (5° to 20° relative to vertical) that optimizes ergonomic comfort. This parameter change transforms the traditional vertical handrail into an ergonomically optimized structure that naturally guides passengers into a comfortable leaning position while remaining manufacturable
Data Source
Figure 1~2
Figure 3
AI summary
An elevator car (1) comprises car walls (2, 3, 4) forming an interior space for passengers. A handrail 7 designed as a backrest for passengers is arranged in the interior space. The handrail (7) has a leaning surface with a height (H) of at least 15 cm and is inclined at an angle (α) relative to the vertical, which lies between 5° and 20°. The handrail 7 is L-shaped, with one of the handrail sections (11) being significantly shorter than the other handrail section (12).