Cup-like Cap for Temperature-Dependent Switch with Segmented Body
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Solution Overview
Problem
Existing temperature-dependent switch caps are complicated to mount and not suitable for automated installation, often damaging connection lugs during the process, which hinders efficient electrical connection and thermal coupling with protected devices.
Innovation Solution
A cup-like cap with accessible openings for connection areas allows for easy external connection of leads, using a cap with a base and side wall that fits accurately onto the switch, enabling soldering or welding without damaging the cap material, and using electrically insulating, temperature-resistant materials like Kapton or Nomex for the cap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cap is designed as a cup-shaped surrounding housing that is pushed onto the switch, then the switch is electrically insulated from the outside, but the mounting process is complicated and not suitable for automated installation
Solution Approach 1:
The cap is segmented into a body portion and a closure portion that can be separately manufactured and assembled. The body portion includes integrated connection area openings that allow leads to be connected before the closure portion is attached, enabling automated assembly while maintaining electrical insulation.
Solution Approach 2:
The connection areas are opened in the body portion before the closure portion is attached to the switch. This preliminary action allows leads to be soldered or welded to the connection areas while the cap is already in place, eliminating the need for post-assembly modifications and enabling automated installation.
2Reliability
If the cap is pushed onto the switch with connection lugs, then the switch is insulated, but the connection lugs may be damaged or bent during the process
Solution Approach 1:
The connection areas are opened in the body portion before the closure portion is attached. This allows connection lugs to be securely soldered or welded to the connection areas while the cap structure is already in place, protecting them from damage during the assembly process and enabling automated installation without rework.
3Ease of manufacture
If the cap material is not temperature-resistant, then the cap can be easily manufactured, but the cap material is damaged during soldering or welding operations
Solution Approach 1:
The cap is manufactured from high-temperature-resistant materials such as polyimide, aromatic polyamide, or PTFE that can withstand the temperatures of soldering and welding operations without degrading. This material selection maintains cap integrity during lead connection processes while still allowing for efficient manufacturing.
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
Enables reliable, automatable installation and simple electrical connection of leads to temperature-dependent switches, ensuring effective thermal coupling and preventing damage to the cap material during soldering or welding operations.
Implementation Method 1
using electrically insulating, temperature-resistant materials like Kapton or Nomex for the cap
Implementation Method 2
using electrically insulating, temperature-resistant materials like Kapton or Nomex for the cap
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A cap (27) for a temperature-dependent switch (10) having a first connection area (22) and at least one second connection area (23) on the outer surface of its housing (11, 12) for the purpose of electrically connecting leads (25, 26) is designed as a cup-like surrounding housing that can be pushed onto the switch (10), preferably with an accurate fit, such that the connection areas (22, 23) for electrical connection are accessible from the outside after said surrounding housing has been pushed on, whereby a first opening (28) for the first connection area (22) and a second opening (29) for the second connection area (23) are provided in said cap (27) (Fig. 2).