Mobile Terminal Safety Switch Grip Layout for Lower Operator Fatigue
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Solution Overview
Problem
Operators experience fatigue and increased burden when using mobile terminals with safety switches for machine operation due to the weight and ergonomic design, particularly when operating for extended periods.
Innovation Solution
A safety switch device with a fixation mechanism that secures mobile terminals of varying sizes and a grip part positioned at the center of gravity, reducing rotational forces and incorporating an emergency stop button and enable switch for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a mobile terminal with a large screen is used to display machine information and enable operation, then the display area and operational capability are improved, but the weight of the mobile terminal increases
Solution Approach 1:
The device is divided into two separate components: a mobile terminal for display and information input, and a safety switch device for safety controls. This segmentation allows the mobile terminal to maintain a large screen without the added weight of safety switches, while the safety functions are provided by a separate lightweight device.
2Reliability
If safety switches are added to the mobile terminal to enable emergency stop and permission functions, then the safety and operational control are improved, but the weight of the operation device increases
Solution Approach 1:
Safety switches are separated from the mobile terminal and placed in a dedicated safety switch device. This allows safety functions to be fully implemented without adding weight to the mobile terminal, which the operator holds.
Solution Approach 2:
The safety switch device acts as an intermediary between the operator and the machine control system. It provides necessary safety controls (emergency stop, permission switch) that communicate with the machine controller without being integrated into the mobile terminal itself.
3Ease of operation
If the mobile terminal is held in one hand for extended periods to operate the machine, then the mobility and flexibility are improved, but the operator fatigue increases
Solution Approach 1:
By separating the mobile terminal from the safety switch device, the weight and bulk are distributed. The operator holds only the lightweight mobile terminal in one hand, while the safety switch device can be placed on a surface or held separately, significantly reducing hand fatigue during extended operation.
Solution Approach 2:
The heavy safety switch components are extracted from the mobile terminal and placed in a separate device that can be set down on a table or control panel. This allows the operator to maintain a lightweight grip on the mobile terminal while still having access to safety controls when needed.
Data Source
AI summary
A safety switch device includes a first support member and a second support member which are formed so as to secure a mobile terminal, and a grip part to be grasped by an operator's hand. The safety switch device includes an enable switch for transmitting a signal for permitting a robot to operate, and an emergency stop button for transmitting a signal for stopping the robot. The first support member and the second support member are formed so as to secure a plurality of types of mobile terminals having different sizes. The grip part is disposed at the center part of the shape of the back surface of the mobile terminal, which corresponds to the position of the center of gravity of the mobile terminal.