Temperature-dependent switch

Abstract

A temperature-dependent switch has a housing whereon a first and at least one second connection surface are arranged for the galvanic attachment of connection leads. Within the housing a temperature-dependent switching mechanism is arranged, which produces or opens an electrically conductive connection between the two connection surfaces depending on the temperature of said switching mechanism. The connection leads are connected via the inner ends thereof to the connection surfaces by one-sided spot welding.

Description

technical field [0001] The invention relates to a temperature-controlled switch having a temperature-controlled switch-on mechanism and a housing for receiving the switch-on mechanism, wherein a first and a second connection surface for the electrical connection of an input line are arranged on the outside on the housing , the temperature-controlled switch-on mechanism establishes or breaks an electrically conductive connection between two connection surfaces depending on its temperature, and an input conductor with its inner end is fastened to at least one connection surface in a materially bonded manner. Background technique [0002] Such a switch is known from DE 10 2009 030 353 B3. [0003] This temperature control switch is also repeatedly disclosed by the prior art. Such thermostat switches are used to protect electrical appliances (such as hair dryers, lye pump motors, irons, etc.) from overheating and / or excessive current flow. [0004] For this purpose, known ther...

AI Technical Summary

Problems solved by technology

[0014] However, in the known switches, it is disadvantageous that the riveting of the sheets is time-consuming and entails the risk of deformation of the housing during the riveting process

And because of the extremely small size of the thermostatic switch, even the smallest deformation of the housing can cause the switch to no longer reliably close and / or open

[0015] Also, the disadvantage: the riveting has to be done before the final assembly of the case

Here, the problem arises that the edge of the lower part cannot be crimped without problems to the cover on the plug-in since the connection flag is already fastened on the cover

However, welding tests carried out by the applicant so far have not been very successful, because the heating directly on the cover makes it possible for the movable contact part to fuse with the fixed contact part or at least to the following extent on its geometry Changed: Makes such mass-produced switches no longer toggle or at least no longer reliably

In addition, the heat input into the interior of the housing during the welding process results in damage to the inverting discs as well, so that the required switching characteristics of the inverting discs are impermissibly altered

[0021] In the known switches, another drawback is found in the complex finishing manufacturing step in which a sintered protective layer is applied

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