Mushroom Pin Lock for Switchgear Door Assembly
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Solution Overview
Problem
Existing push rod locks for switch cabinet doors require complex assembly processes and multiple screw connections, making them cumbersome and costly to manufacture.
Innovation Solution
A push rod lock design featuring a mushroom pin connection that allows for easy mounting by aligning the door lock plate with the push rod via an actuating element, enabling a single actuation to secure the lock plate on the outer side of the switch cabinet door, with a coupling piece engaging the actuating element for vertical displacement and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional screw connections are used to mount the door lock plate, then the locking is secure, but the assembly process becomes cumbersome and time-consuming
Solution Approach 1:
The door lock plate is divided into modular components: the plate itself, the actuating element with mushroom pin, and the coupling piece. This segmentation allows the mushroom pin to be independently positioned and engaged, enabling quick snap-on assembly without requiring multiple screw connections. The coupling piece separates the actuating element from the push rod, allowing independent assembly of each component.
Solution Approach 2:
The mushroom pin is pre-positioned on the actuating element at a predetermined position that aligns with the coupling piece. This preliminary positioning allows the door lock plate to be quickly snapped onto the push rod in a single actuation motion, eliminating the need for time-consuming alignment and screw fastening operations during assembly.
2Reliability
If multiple screw connections are used, then the locking is reliable, but the manufacturing cost increases
Solution Approach 1:
The traditional screw connection system is extracted and replaced with a mushroom pin snap-on mechanism. The mushroom pin, with its enlarged head, provides reliable locking through friction and geometric interlocking when engaged with the coupling piece, eliminating the need for multiple screws and reducing manufacturing complexity and cost.
Solution Approach 2:
The mushroom pin connection uses simple, inexpensive components that can be easily manufactured from standard materials. The coupling piece and mushroom pin are designed as simple plastic or metal inserts that replace expensive multi-screw assemblies, reducing both material and labor costs while maintaining adequate reliability for the application.
3Ease of operation
If a simple snap-on mechanism is used, then the assembly is convenient, but the mechanism becomes complex
Solution Approach 1:
The actuating element serves multiple functions: it acts as the snap-on component for mounting the door lock plate, provides the mushroom pin for securing the plate to the push rod, and transmits actuation force from the push rod to the locking mechanism. This multi-functionality reduces the need for separate components, simplifying the overall mechanism while maintaining ease of assembly.
Solution Approach 2:
The coupling piece acts as an intermediary element between the actuating element and the push rod. It provides a simple geometric interface that enables the snap-on connection without requiring complex mechanical linkages. The coupling piece's predetermined position and shape allow the mushroom pin to engage naturally, reducing mechanism complexity while enabling convenient assembly.
Data Source
AI summary
The invention relates to a push rod lock for a switch cabinet housing, having a linearly adjustable push rod which is arranged on an inner side of a switch cabinet door and projects with a coupling piece from the inner side through the switch cabinet door, wherein a door lock plate which is mounted via an outer side of the switch cabinet door opposite the inner side is fixed to an actuating element which is coupled to the coupling piece via a mushroom pin connection on the switch cabinet door, wherein the push rod is adjustable between a second open position and a second closed position via the actuating element which is adjustable between a first open position and a first closed position, wherein the mushroom pin connection is arranged at least in a release position in which the door lock plate is removable from the switch cabinet door at least when the push rod is arranged in the second closed position and the actuating element is arranged in an intermediate position between the first open position and the first closed position, and wherein the mushroom pin connection assumes a locking position when the actuating element is transferred from the intermediate position into the second closed position when the door lock plate is placed on the switch cabinet door in the release position. Additionally, a corresponding arrangement and a corresponding method are described.