Controller Housing Snap Fastener Assembly
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Solution Overview
Problem
Existing controller housings are prone to long production times due to the need for screwing together two shells, which compromises assembly efficiency and durability, especially under environmental stressors like impacts and water exposure.
Innovation Solution
A housing design featuring a snap fastener connection between the upper shell and base element, with a spring element pressing the printed circuit board against the base for stability and heat dissipation, eliminating the need for screws and enhancing sealing and assembly speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two shells are screwed together to form a housing, then the housing provides stable protection against environmental influences, but the production time increases significantly
Solution Approach 1:
The housing is divided into two separate shells that can be quickly assembled using snap fasteners instead of traditional screw connections. This segmentation allows for rapid assembly while maintaining the protective function, directly addressing the contradiction between assembly speed and structural integrity.
Solution Approach 2:
The traditional screw-based mechanical fastening system is replaced with a snap fastener system. This substitution eliminates the need for threading and tightening operations, dramatically reducing assembly time while still providing sufficient mechanical strength and environmental protection.
2Strength
If screws are used to fasten the printed circuit board to the shell, then the board is securely held, but the assembly effort and time increase
Solution Approach 1:
Screw-based mechanical fastening of the printed circuit board is replaced with a spring-loaded pressing mechanism. The spring element automatically applies sufficient force to secure the board against the base element without requiring manual screw fastening, thereby maintaining secure mounting while dramatically reducing assembly effort.
Solution Approach 2:
The spring element provides self-adjusting pressure to secure the printed circuit board in place. As components are assembled, the spring automatically engages and applies the necessary force to hold the board securely, eliminating the need for additional fastening operations by the assembler.
3Temperature
If the printed circuit board is not pressed against the base element, then assembly is simpler, but heat dissipation and stability are insufficient
Solution Approach 1:
The spring element serves multiple functions simultaneously: it presses the printed circuit board against the base element for both mechanical stability and thermal contact, while also helping to seal the connector opening. This multi-functionality achieves heat dissipation and stability goals without proportionally increasing assembly complexity.
Solution Approach 2:
The functions of mechanical support, heat dissipation, and sealing are merged into a single integrated solution. The spring-loaded pressing mechanism simultaneously ensures thermal contact between the board and base element while contributing to the sealing of the housing, thereby achieving multiple objectives without separate complex mechanisms.
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
The design significantly reduces assembly effort, provides robust stability and protection, and ensures secure seating and effective heat dissipation, while maintaining a quick and easy installation process.
Implementation Method 1
a spring element is provided which, when the housing is in the closed state, presses the printed circuit board against the base element
Implementation Method 2
the base element is designed as a heat sink for transistors and other components on the printed circuit board
Implementation Method 3
the upper shell and base element are connected to one another in a sealing manner via snap fasteners
Data Source
Figure 1~3
Figure 4
AI summary
The housing (10) has an upper surface (12), a base unit and a printer circuit board, where a recess for plug-in connection with an electrical connector is provided in the printer circuit board. The recess is accessible in the upper surface from the outside over a through hole. The upper surface and the base unit are provided with a spring lock (24) with one another in a sealable manner, and the printed circuit board is held between the upper surface and the base unit by a flexible unit.