Sidewall Switch Structure for Circuit Board Space Reduction
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Solution Overview
Problem
Conventional circuit board switches require significant space due to their design, which is a challenge in the trend towards miniaturization of electronic products, and they also incur additional costs from the use of metal domes and other components.
Innovation Solution
A switch structure is developed that includes conductive portions on the sidewall of a circuit board, which are electrically insulated and connected/disconnected by a movable unit, reducing the space needed for the switch and eliminating the need for conventional switches and metal domes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional circuit board switches are mounted on the circuit board using SMT or DIP, then the switch function is achieved, but the space required on the circuit board is large
Solution Approach 1:
The patent transitions the switch structure from a planar surface-mount configuration to a three-dimensional sidewall configuration. Conductive portions are formed on the sidewall of the circuit board, and the movable unit operates in a vertical dimension perpendicular to the board surface, effectively utilizing vertical space rather than horizontal board area.
Solution Approach 2:
The switch structure is integrated within the circuit board itself rather than being mounted on top. The conductive portions are formed within grooves or recesses of the sidewall, and the movable unit is disposed within a housing that is part of the circuit board structure, nesting the switch components within the board's own volume.
2Reliability
If conventional circuit board switches and metal domes are employed, then the switch function is achieved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple components into a single integrated structure. The circuit board itself provides the housing, the conductive portions are formed directly on the board's sidewall, and the movable unit is integrated within the board structure, eliminating the need for separate switch components and metal domes that would require additional manufacturing steps and materials.
Solution Approach 2:
The circuit board structure serves multiple functions: it provides the mechanical housing, forms the conductive elements through its sidewall structure, and enables the switching action through the movable unit. This self-service approach eliminates the need for separate dedicated components, reducing manufacturing complexity and cost.
3Volume of moving object
If the circuit board is miniaturized to meet light weight and small size requirements, then the electronic product size is reduced, but the space available for mounting conventional switches is further limited
Solution Approach 1:
The invention exploits the third dimension (vertical height) by forming conductive portions on the sidewall and operating the movable unit in a direction perpendicular to the board surface. This dimensional transition allows the switch to function within a compact footprint, accommodating miniaturized product requirements.
Solution Approach 2:
The movable unit is designed with a button portion that can be pressed from the board surface, utilizing a thin-film or flexible structure that requires minimal space. The housing integrates the switch mechanism within a compact form factor suitable for thin and small electronic devices.
Data Source
AI summary
A switch structure on the sidewall of a circuit board for an electronic device and manufacturing methods of the circuit board are provided. The switch structure includes a circuit board, a plurality of conductive portions, and a movable unit. The conductive portions are formed on a sidewall of the circuit board and electrically insulated from each other. The movable unit is disposed corresponding to the conductive portions to electrically connect or disconnect the plurality of conductive portions to achieve the switch function. The switch structure utilizes the structural design of the circuit board to reduce the space on the circuit board preserved for a circuit board switch.