Electrical Switching Device Jump Function Assembly
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Solution Overview
Problem
Existing electrical installation switching devices with a jump function are mechanically complex and require precise geometric tolerances, making automated and rapid assembly complicated and expensive.
Innovation Solution
An operative connection means is provided between the switching toggle and the means for temporarily holding the movable contact lever, allowing the means to be brought into a release position when the toggle is moved further, simplifying the assembly by limiting the contact lever's functions and reducing the need for precise positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the means for temporarily holding the movable contact lever interacts with the contact lever in two ways (holding and releasing), then the jump function is achieved, but the design becomes mechanically complex and requires precise geometric tolerances
Solution Approach 1:
The patent divides the release function into two separate components: the means for temporarily holding the movable contact lever (which only holds) and the switching toggle extension (which only releases). This segmentation eliminates the need for the holding means to perform dual functions, thereby reducing mechanical complexity and tolerance requirements while maintaining the jump function.
Solution Approach 2:
The release function is extracted from the means for temporarily holding the movable contact lever and assigned to a separate component (the switching toggle extension). This extraction allows the holding means to focus solely on holding, simplifying its design and reducing the geometric tolerances it must maintain.
2Reliability
If the contact lever fulfills two partially opposing functions (being held and releasing itself), then the jump function is achieved, but automated and rapid assembly becomes complicated and expensive
Solution Approach 1:
The patent segments the functions into separate components: the means for temporarily holding the movable contact lever handles only the holding function, while the switching toggle extension handles the release function. This segmentation makes each component simpler and more suitable for automated assembly, eliminating the complexity of making the contact lever perform dual opposing functions.
Solution Approach 2:
The release function is extracted from the contact lever and assigned to the switching toggle extension. This extraction simplifies the contact lever to a single-function component, making it easier to manufacture and assemble automatically, while the jump function is still achieved through the coordinated action of the separated components.
3Reliability
If the means for temporarily holding the movable contact lever is released by the contact lever itself, then the jump function is achieved, but precise adherence to geometric tolerances is required
Solution Approach 1:
The release function is extracted from the means for temporarily holding the movable contact lever and assigned to the switching toggle extension. This separation means the holding means only needs to maintain holding geometry, not release geometry, significantly reducing the geometric tolerances required and simplifying manufacturing precision requirements while preserving the jump function.
Data Source
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AI summary
The invention relates to an electrical service switching device (1) having a switching mechanism having a latching point, having a contact lever (2) which is connected to a switching knob (5) by means of a lug (3) and a coupling element (4), wherein, when the switching knob (5) is pivoted in the switch-on direction, the contact lever (2) is moved to the switch-on position by means of the coupling element (4) and the lug (3) when the latching point is latched, wherein means (10) are provided for temporarily firmly holding the moving contact lever (2) during the switch-on process. An operative connection means (11) is provided between the switching knob (5) and the means (10) in order to move the means (10) to a release position when the switching knob (5) is moved further, the contact lever (2) being released in said release position, with the result that the moving contact piece (6) which is mounted on the contact lever suddenly strikes the stationary contact piece (7).