Blade Driving Device Shared Engaging Pins Thickness Reduction
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Solution Overview
Problem
Conventional blade driving devices are bulky and complex due to separate radial regulating portions for pivotal members and diaphragm blades, leading to increased thickness and power consumption, and require additional spaces for engagement and radial regulation.
Innovation Solution
A blade driving device with a pivotal member that comes into slidable contact with engaging portions on the opening forming member, allowing for radial regulation by shared engaging pins, reducing the need for separate driving spaces and simplifying the structure to achieve thickness reduction and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate radial regulating portions are provided for pivotal members and diaphragm blades, then radial regulation is achieved, but device thickness and complexity increase
Solution Approach 1:
The patent merges the radial regulation function for both the pivotal member and diaphragm blades into a single engaging portion structure. The engaging portion simultaneously engages with the pivotal member and regulates the diaphragm blades, eliminating the need for separate radial regulating portions and thereby reducing device complexity while maintaining reliable radial regulation for both components.
Solution Approach 2:
The engaging portion is designed to perform multiple functions: it serves as both the engagement mechanism for the pivotal member and the radial regulation mechanism for the diaphragm blades. This multi-functional design allows a single structure to achieve what previously required separate components, reducing overall device complexity.
2Ease of operation
If separate driving spaces are provided for pivotal member and diaphragm blades, then operational independence is achieved, but device thickness increases
Solution Approach 1:
The patent combines the driving spaces for the pivotal member and diaphragm blades into a shared space. The engaging portion acts as a common interface that allows both components to operate independently while occupying the same spatial region, thereby eliminating the need for separate driving spaces and reducing device thickness.
Solution Approach 2:
The patent transitions from a vertical stacking arrangement (separate driving spaces in different vertical positions) to a planar shared space arrangement. By using the engaging portion as a common interface in the same driving space, the design utilizes horizontal positioning rather than vertical layering, thereby reducing the vertical dimension (thickness) of the device.
3Manufacturing precision
If complex radial regulating portions are used, then precise radial control is achieved, but power consumption and device thickness increase
Solution Approach 1:
The patent extracts the radial regulation function from complex separate regulating portions and consolidates it into the simpler engaging portion structure. By removing unnecessary components and retaining only the essential engagement and regulation functionality, the design achieves precise radial control with reduced complexity, lower power consumption, and decreased device thickness.
Data Source
AI summary
A blade driving device includes an opening forming member forming an opening portion, a pivotal member pivoting about the opening portion, blades configured to enter or exit from the opening portion upon receiving power transmitted from the pivotal member, a cover member arranged so that the pivotal member and the plurality of blades are located between the cover and the opening forming member, and engaging portions engaging the of blades with the opening forming member. The pivotal member comes into slidable contact with the engaging portions in a process of pivoting. A pivotal position of the pivotal member with respect to the opening forming member is defined by the engaging portions.