Replaceable Impact Surface for Movable Device Safety Switch
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Solution Overview
Problem
Conventional safety-switch devices on movable devices are prone to damage when coming into contact with hard objects, leading to ineffective operation and increased economic downtime, as they lack a replaceable impact surface and are difficult to manufacture and retrofit.
Innovation Solution
A safety-switch device with a separate, replaceable impact surface and bracket that forms a protective enclosure around the switch, allowing for quick replacement and easy integration onto various movable devices, featuring a rigid impact surface that transmits forces effectively to trigger the switch, even when contacted at angles, and can be made from various materials without softeners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the safety-switch device is placed on the outside of the movable device housing for fastest response, then the safety response time is improved, but the switch circuit becomes vulnerable to damage from contact with hard objects
Solution Approach 1:
The safety-switch device is segmented into three main components: the switch circuit (protected inside the housing), the bracket (mounted on housing exterior), and the impact surface (exposed to external environment). This segmentation allows the vulnerable switch circuit to be isolated from damage risks while maintaining fast response capability through the external bracket and impact surface configuration.
Solution Approach 2:
The bracket serves as an intermediary element between the protected switch circuit inside the housing and the exposed impact surface. It transmits impact forces from the impact surface to the switch circuit while being mounted on the housing exterior, thus mediating between the need for external placement (fast response) and internal protection (durability).
2Ease of repair
If the impact surface is made as a separate replaceable component for easy replacement, then the ease of repair is improved, but the device complexity increases
Solution Approach 1:
The impact surface is designed as a separate, replaceable component distinct from the bracket and switch circuit. This segmentation enables the impact surface to be replaced independently when damaged, without requiring replacement of the entire safety-switch device or disassembly of the protected switch circuit, thus improving ease of repair.
Solution Approach 2:
The bracket is designed with universal mounting features that can accommodate different impact surface configurations and materials. The standardized interface between the bracket and impact surface allows various impact surface designs to be used with the same bracket structure, reducing overall device complexity despite the modular component approach.
3Reliability
If the impact surface is made rigid to transmit forces effectively, then the reliability of switch actuation is improved, but the risk of damage from angled impacts increases
Solution Approach 1:
The impact surface is designed with varying local properties: it has sufficient rigidity in the direction of normal impact forces to effectively transmit actuation forces to the switch circuit, while its geometry and mounting allow it to deflect or absorb angled impacts that could cause damage. The bracket mounting provides localized flexibility to handle abnormal impact angles.
Solution Approach 2:
The bracket mounting system is designed to absorb and distribute abnormal impact forces before they reach the rigid impact surface and switch circuit. The housing and bracket structure provide beforehand cushioning against angled impacts, preventing damage while allowing the rigid impact surface to maintain its force transmission capability for normal actuation.
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
Ensures high availability of movable devices by allowing quick and tool-free replacement of damaged impact surfaces, providing a sensitive and reliable safety response without increasing the risk of further damage to the switch, and can be easily adapted to different devices during production or as a retrofit.
Implementation Method 1
If an obstacle makes contact with the bracket and/or impact surface, the force of the contact on the impact surface moves the impact surface from its resting position forward, in the direction of the contact force, toward the switch, thereby actuating the switch.
Data Source
AI summary
A safety-switch device for mounting on a movable device. An impact surface is mounted on or assembled in a bracket. The bracket, impact surface, and a mounting surface of the movable device form a protective enclosure around the switch. The switch is a switch strip or a switch mat. The impact surface is a separate, movable, rigid or stiff component that serves as an actuator for the switch and is provided as a component that is easily replaceable. A trigger mechanism is provided between the impact surface and the switch. When the impact surface moves from its resting position to its actuation position, the trigger mechanism trips the switch.