Assembly Alignment Structure for Electronic Device Rails
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Solution Overview
Problem
Existing assembly structures for guiding members, such as circuit boards, lack reliability due to narrow pinch holding pieces that fail to prevent lateral movement, leading to misalignment and detachment issues when the member is shifted by the thickness of the chassis, resulting in poor workability and alignment reliability.
Innovation Solution
An assembly alignment assistance structure featuring a first sheet metal member with a bent part forming a slit and a second sheet metal member with a cutout, where the bent part has an arm and a sloped contact surface to guide the rail part slidingly into the slit, ensuring proper alignment even with slight deviations, and the cutout's opening faces the slit's opening to stabilize the rail part's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pinch holding pieces are formed by bending the side plate inward, then the structure is simple and compact, but the width of the pinch holding pieces becomes limited to the side plate thickness, causing unreliable guidance and lateral movement of the member
Solution Approach 1:
The bent part is divided into multiple functional segments: an arm part extending from the wall part, and a contact surface part extending from the arm part. This segmentation allows each part to perform its specific function - the arm part provides structural support and positioning, while the contact surface part directly guides the member through its sloped geometry, preventing lateral movement and ensuring reliable insertion
Solution Approach 2:
The contact surface part is designed with a slope in the lateral direction (width direction), creating a three-dimensional guiding surface rather than a simple linear constraint. This sloped surface guides the member along an inclined path during insertion, automatically correcting lateral deviations and preventing detachment, thereby enhancing guidance reliability without increasing overall structural complexity
2Volume of moving object
If the alignment part is formed in an invisible position to reduce device size, then the electronic device becomes more compact, but the assembly worker cannot see the alignment part, making alignment difficult and workability poor
Solution Approach 1:
The alignment assistance structure is designed to be self-guiding through its sloped contact surface geometry. The structure itself performs the alignment function passively by guiding the member through its inclined surface during insertion, eliminating the need for active visual monitoring or complex adjustment mechanisms, thereby maintaining compact size while ensuring reliable alignment
3Device complexity
If the pinch holding pieces have no lateral movement regulation mechanism, then the structure remains simple, but the member can move laterally by the thickness of the side plate, causing detachment from the pinch holding pieces
Solution Approach 1:
The contact surface part is designed with a slope that creates a dynamic guiding effect during insertion. As the member is inserted, the sloped surface actively engages with the member and guides it along an inclined path, dynamically preventing lateral movement and detachment. This dynamic guidance mechanism provides stability during the insertion process without requiring additional complex locking or regulation components
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
This solution provides high reliability in guiding members to their intended mounting position, enhancing assembly workability and efficiency by allowing for increased deviation tolerance and stable alignment without visual inspection of alignment parts, thus improving assembly reliability and reducing damage to components.
Implementation Method 1
The contact surface part is sloped with respect to the direction of insertion such that, when the guide target member is inserted, the first rail part coming into contact with the contact surface part is slidingly guided into the slit
Data Source
AI summary
A bent part (42) extends from an edge part of a wall part (41) being parallel to the direction of insertion of a rail part (90a). The bent part (42) has an arm part (42a) extending in a direction crossing the direction of insertion, and a contact surface part (42b) extending from the arm part (42a) in a direction crossing the direction of the arm part (42a). An opening of a slit (43) formed between the wall part (41) and the bent part (42) faces an opening of a cutout (61) into which the rail part (91a) is to be inserted. The contact surface part (42b) is sloped such that the rail part (90a) is slidingly guided into the slit (43).