Blade Drive Device Integrating Regulating Portions
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Solution Overview
Problem
Existing blade drive devices for optical apparatuses, such as digital cameras, increase the number of components to suppress blade bounding and dust generation, which complicates the design and functionality.
Innovation Solution
A blade drive device with a partition plate having integrally formed regulating portions that prevent blade overrun and bounding, where the blades abut on these regulating portions during expansion, and the regulating portions are designed to absorb impulsive forces, reducing the need for additional components and minimizing dust generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cushioning member and a blade contact member are provided separately to suppress blade bounding, then blade bounding is suppressed, but the number of components increases
Solution Approach 1:
The cushioning member and blade contact member are integrated into a single regulating portion that is integrally formed with the partition plate. This merging of functions eliminates the need for separate components while maintaining the dual functionality of suppressing blade bounding and preventing dust generation through the blade contact surface.
Solution Approach 2:
The regulating portion serves multiple functions simultaneously: it acts as a cushioning member to suppress blade bounding, provides a blade contact member surface for reduced dust generation, and is integrally formed with the partition plate for structural support. This multi-functionality reduces component count while achieving multiple objectives.
2Reliability
If multiple separate members are used for suppressing blade bounding, then blade bounding is suppressed, but assembly precision becomes more difficult to control
Solution Approach 1:
By integrating the cushioning member and blade contact member into a single regulating portion that is mold-formed as one piece with the partition plate, the invention eliminates assembly errors between multiple components. The integral structure ensures precise positioning and consistent performance without requiring high-precision assembly of separate parts.
3Object-generated harmful factors
If separate cushioning member and blade contact member are used, then dust generation is suppressed, but device complexity increases
Solution Approach 1:
The regulating portion combines the cushioning function and blade contact surface into a single integrally formed component. The blade contact member portion is specifically designed with appropriate material properties to reduce dust generation during blade contact, while being part of the unified regulating portion structure.
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 prevents blade overrun and bounding while maintaining a reduced component count, improving assembly precision and suppressing dust generation, thus enhancing the operational efficiency and reliability of the blade drive device.
Implementation Method 1
the regulating portions are bent and deformed when the blades collide with the regulating portions. Accordingly, the impulsive force due to the collision of the blades can be efficiently absorbed.
Data Source
AI summary
To provide a blade drive device capable of suppressing the increase in number of components while suppressing the bounding of blades, and an optical apparatus including the blade drive device. A blade drive device 10 includes a partition plate 21 having an opening 22, blades 31a to 34a, 31b to 34b which are expanded in a state where the opening 22 is closed and which overlap one another in a state where the opening 22 is opened, and a first regulating portion 23A and a second regulating portion 24A integrally formed with the partition plate 21, on which the blades 31a, 31b abut when being expanded. An optical apparatus includes the blade drive device 10.