Side-Push Switch Housing Reinforcement via Front-Mounted Frame
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional side-push push-button switches face issues with mechanical and electrical reliability due to weak rear housing strength, leading to potential detachment from circuit boards and defective connections under external pressures, especially in small-size digital devices like cellular phones.
Innovation Solution
A channel-shaped holding frame is secured to the front surface of the housing with both ends on the push-button member sides, covering the rear surface and increasing strength, while reinforcement ribs enhance bending resistance and a stepped design prevents flux spread during soldering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If both ends of the holding frame are located on the rear side of the housing, then the housing can be mounted on the circuit board, but the positions of both ends of the holding frame are displaced under pressure and gaps are formed
Solution Approach 1:
The patent inverts the conventional mounting approach by positioning both ends of the holding frame on the front surface of the housing instead of the rear side. This inversion allows the holding frame ends to be located in regions less susceptible to displacement under pushing pressure, thereby maintaining position stability and preventing gap formation while still enabling circuit board mounting.
2Length of moving object
If the push-button switch is thinned for small-size devices, then the device size is reduced, but the rear surface strength of the housing is insufficient under external pressure
Solution Approach 1:
The patent applies local quality by positioning both ends of the holding frame on the front surface of the housing, specifically in regions with greater thickness compared to the rear side. This local structural advantage provides enhanced strength at the holding frame mounting positions, enabling the overall push-button switch to be thinned while maintaining sufficient rear surface strength under external pressure.
3Reliability
If the holding frame surrounds the housing from front to rear, then the housing is secured to the circuit board, but the load concentrates on the rear side under switching operation
Solution Approach 1:
The patent extracts the critical mounting function from the entire holding frame structure and concentrates it at both ends of the holding frame positioned on the front surface. This extraction allows the holding frame to secure the housing to the circuit board effectively while eliminating the concentration of load on the rear side during switching operations, as the front surface positioning distributes stress more favorably.
Data Source
AI summary
A side-push push-button switch is provided in which the strength of a rear surface side of a housing to which a load is particularly applied by outside force caused by the switching operation of a push-button member is increased to stably mount the housing on a circuit board and ensure reliable and secure switching operation. The push-button switch includes a housing, a push-button member, and a holding frame. The housing accommodates a switch contact. The push-button member is disposed on a front-surface center portion of the housing and configured to press the switch contact. The holding frame of a channel shape covers outer surfaces of the housing. Both ends of the holding frame are secured to front-surface side portions of the housing on both sides of the push-button member.