Single Mark Projector for Multi-Height Position Correction

Solution Overview

Problem

Existing component mounting devices with correction marks at different heights require complex structures and increased size due to separate bar-like members and mark projectors, making them cumbersome and difficult to simplify.

Innovation Solution

A substrate working device and component mounting device design that uses a single mark projector with multiple projection targets and a lens unit to project correction marks at different heights, reducing the number of components and simplifying the structure, while maintaining accurate position correction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If separate bar-like members and mark projectors are used to dispose correction marks at different heights, then the correction marks can be imaged by base cameras and scan camera, but the device structure becomes complicated and size increases

Engineering Contradiction:

Improveposition correction accuracyVSAvoidstructure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple mark projectors into a single integrated mark projector that can project correction marks at different heights simultaneously. This is achieved by integrating multiple projection targets and optical paths within one projector unit, eliminating the need for separate bar-like members and individual mark projectors for each height level.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated mark projector is designed to perform multiple functions: it can project correction marks at different heights (first height for base cameras, second height for scan camera) using a single device. This multi-functional design replaces what previously required multiple specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If separate bar-like members and mark projectors are used to dispose correction marks at different heights, then the correction marks can be imaged by base cameras and scan camera, but the device size increases

Engineering Contradiction:

Improveposition correction accuracyVSAvoiddevice size

Core Design Contradiction:

Measurement precisionVSVolume of moving object

Solution Approach 1:

The patent combines multiple mark projectors into a single integrated mark projector that can project correction marks at different heights simultaneously. This is achieved by integrating multiple projection targets and optical paths within one projector unit, eliminating the need for separate bar-like members and individual mark projectors for each height level.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated mark projector employs a nested structure where multiple projection targets are arranged within a compact configuration. The optical components and projection targets are nested within each other, allowing the system to maintain multiple projection functions while minimizing the overall device volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Measurement precision

If multiple correction marks are disposed at different heights, then position correction for both base cameras and scan camera can be achieved, but the number of components increases

Engineering Contradiction:

Improveposition correction accuracyVSAvoidcomponent count

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent combines multiple mark projectors into a single integrated mark projector that can project correction marks at different heights simultaneously. This is achieved by integrating multiple projection targets and optical paths within one projector unit, eliminating the need for separate bar-like members and individual mark projectors for each height level.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated mark projector is designed to perform multiple functions: it can project correction marks at different heights (first height for base cameras, second height for scan camera) using a single device. This multi-functional design replaces what previously required multiple specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 design simplifies the structure and reduces the size of the device by using a single mark projector to project correction marks at different heights, ensuring accurate position correction and reducing component count, thus addressing the complexity and size issues of existing devices.

Implementation Method 1

a lens unit that projects the first projection target as the first correction mark to the first height and projects the second projection target as the second correction mark to the second height

Methodology Applied

Scientific EffectOptical projection: Lens

Data Source

PatentUS11310951B2Substrate working device and component mounting device

Publication Date: 2022.04.19 YAMAHA MOTOR CO LTD

AI summary

A substrate working device includes a working unit that performs work on a substrate on which a component is mounted, an imager capable of imaging a correction mark for position correction, and a mark projector that projects the correction mark. The correction mark includes a first correction mark and a second correction mark. The mark projector projects the first correction mark to a first height and projects the second correction mark to a second height.