SMD Mounting Head Vertical Contact Detection
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Solution Overview
Problem
Conventional electronic component mounting machines face inefficiencies due to sensor interference with previously mounted components on the circuit board, limiting control precision and mounting efficiency.
Innovation Solution
The electronic component mounting machine employs a contact-detecting sensor positioned above the component holding section, using a syringe and displacement portions to determine contact with the circuit board without applying load from a second displacement portion, allowing for efficient mounting by avoiding sensor interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is disposed close to the circuit board to detect electronic component contact, then contact detection precision is improved, but the sensor interferes with previously mounted components on the circuit board
Solution Approach 1:
The patent introduces a second displacement portion that moves in the vertical direction (Z-axis) independently from the horizontal positioning (X-Y plane). The target detection portion is positioned above the syringe and can move vertically to detect contact, separating the detection function from the mounting head's horizontal movement path, thus avoiding interference with mounted components while maintaining detection precision
Solution Approach 2:
The patent introduces a target detection portion as an intermediary element that is positioned above the syringe. This target detection portion serves as a mediator between the contact-detecting sensor and the circuit board, allowing the sensor to detect contact through the movement of the target detection portion without the sensor itself needing to be close to the circuit board, thereby avoiding interference with mounted components
2Reliability
If the sensor moves up and down with the nozzle body to maintain detection position, then detection capability is maintained, but control restrictions increase due to interference with mounted components
Solution Approach 1:
The holder is segmented into multiple independent portions: the syringe that moves with the lifting and lowering section, the first displacement portion that moves relative to the syringe, and the second displacement portion with the target detection portion that moves vertically relative to the syringe. This segmentation allows each portion to perform its specific function independently, maintaining detection capability while avoiding control restrictions from sensor interference
Solution Approach 2:
The patent creates a dynamic detection system where the target detection portion can move vertically independently from the horizontal positioning of the mounting head. The second displacement portion is configured to move up and down relative to the syringe, allowing the target detection portion to dynamically adjust its position to detect contact without being constrained by the horizontal movement of the mounting head, thus eliminating control restrictions
3Productivity
If the target detection portion is positioned above the syringe to avoid interference, then mounting efficiency is improved, but the structure becomes more complex
Solution Approach 1:
The holder structure is designed with nested portions: the first displacement portion is nested within the syringe, and the second displacement portion with the target detection portion is nested within the first displacement portion. This nested configuration allows multiple functional portions to be integrated in a compact manner, reducing overall structural complexity while maintaining the vertical positioning of the target detection portion above the syringe for efficient mounting operations
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 configuration enables efficient electronic component mounting by eliminating the need to manage sensor interference, preventing damage from impact and enhancing control over the mounting process.
Implementation Method 1
a first urging portion configured to urge the first displacement portion downward with respect to the syringe
Data Source
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AI summary
A holder comprises: a syringe configured to move up and down as the lifting and lowering section moves up and down, a first displacement portion configured to move up and down with respect to the syringe and to which the component holding section is attached, a first urging portion configured to urge the first displacement portion downward with respect to the syringe, a second displacement portion provided separately from the first displacement portion and configured to move up and down with respect to the syringe and the first displacement portion, and a second urging portion configured to urge the second displacement portion upward with respect to the syringe. The second displacement portion includes an engaging portion configured to engage the first displacement portion urged downward by the first urging portion in a vertical direction, and a target detection portion coupled to the engaging portion and positioned above the syringe. The contact determination section has a sensor disposed above the component holding section configured to detect displacement of the target detection portion with respect to the syringe; and the contact determination section determines that an electronic component has contacted the circuit board when displacement of the target detection portion is detected with the sensor.