Planar Transformer Bobbin Assembly for Slim Height Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional planar transformers have a high total height due to their structure, making it difficult to further lower the height and resulting in a non-slim configuration for flat panel displays.
Innovation Solution
A bobbin assembly with a flange part and snap protrusions is used to firmly fix pins through the bobbin body, allowing the bobbin assembly to be conveniently assembled to a transformer board, and the total height of the planar transformer is lowered by using the flange part during mounting, with pins having a bent shape, such as an inverted U-shape, to connect the transformer board and main PCB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional planar transformer structure is used, then the transformer can be mounted on the main PCB, but the total height becomes large making it difficult to achieve a slim configuration
Solution Approach 1:
The transformer structure is divided into separate functional components: the transformer board with core and coils, the bobbin assembly with pin fixation, and the flange part for mounting. This segmentation allows each component to be optimized independently, reducing the overall height while maintaining assembly convenience through modular construction.
Solution Approach 2:
The flange part extends horizontally from the bobbin body rather than vertically, changing the mounting dimension from height-oriented to width-oriented. This dimensional shift allows the transformer to achieve a slim profile in the height direction while providing sufficient mounting surface area on the main PCB.
2Reliability
If pins are used to connect transformer board and main PCB, then electrical connection is established, but the pins require secure fixation increasing structural complexity
Solution Approach 1:
The bobbin assembly merges the pin fixation function with the structural support function. The bobbin body integrates pin holes, guide grooves, and snap protrusions into a single component that simultaneously secures the pins and provides mechanical support for the transformer board assembly.
Solution Approach 2:
The bobbin assembly acts as an intermediary component between the transformer board and the pins. It provides a standardized interface with pre-formed pin holes and fixation structures, simplifying the connection process while ensuring reliable pin retention without requiring complex external fixation mechanisms.
3Length of moving object
If the transformer is mounted with linear pins penetrating through, then connection is achieved, but the height from PCB surface to transformer upper surface is maximized
Solution Approach 1:
Instead of having pins extend vertically through the entire assembly height, the flange part inverts the mounting approach by providing a horizontal mounting surface that sits flush on the main PCB. This inversion reduces the vertical height while the bent pins provide lateral connection strength.
Solution Approach 2:
The pin configuration changes from straight linear pins to bent pins with inverted U-shape or multiple bends. This parameter change in pin geometry allows the pins to achieve secure mechanical anchoring and electrical connection while accommodating the reduced vertical space in the slim transformer configuration.
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 solution effectively lowers the total height of the planar transformer, enabling a slimmer configuration for flat panel displays by securely fixing pins and allowing easy assembly, thereby addressing the height constraint of conventional transformers.
Implementation Method 1
A transformer is a device changing alternating current (AC) voltage and current values using electromagnetic induction
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The following disclosure relates to a planar transformer and a bobbin assembly applied thereto, and more particularly, to a planar transformer in which pins may be firmly fixed through a bobbin body, a bobbin assembly may be conveniently assembled to a transformer board using snap protrusions of the bobbin body, and a total height of the planar transformer may be lowered using a flange part at the time of mounting the planar transformer, and a bobbin assembly applied thereto.