Blade Drive Device Single Biasing Member Stabilization
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Solution Overview
Problem
Existing blade drive devices with multiple actuators face challenges in maintaining stable operating characteristics while minimizing size increase, as providing biasing members for each actuator can lead to increased device size and variability in performance.
Innovation Solution
A blade drive device design incorporating a single biasing member that biases both actuators toward their respective positioning portions, effectively reducing the relative positional displacement of stators and rotors, thus stabilizing the operating characteristics and minimizing size expansion, while using a holder and cover with strategically placed biasing members to define the positions of stators in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If biasing members are respectively provided for plural actuators, then operating characteristics of the blade are stabilized, but the blade drive device is increased in size
Solution Approach 1:
The patent combines multiple biasing functions into a single biasing member. This single biasing member is configured to bias multiple actuators simultaneously, integrating the function of what would traditionally require separate biasing members for each actuator. This merging approach maintains the stabilizing effect on operating characteristics while reducing the overall device size by eliminating redundant components.
Solution Approach 2:
The biasing member is designed with multi-functionality to serve multiple actuators at once. It incorporates positioning portions that can interact with multiple actuators, allowing one component to perform the role of several components would traditionally play. This universal design reduces part count and device volume while maintaining reliable positioning and biasing for all actuators.
2Manufacturing precision
If biasing members are respectively provided for plural actuators, then positioning accuracy of actuators is improved, but the number of parts is increased
Solution Approach 1:
The patent merges multiple positioning functions into a single biasing member structure. The biasing member includes integrated positioning portions that can simultaneously position multiple actuators, reducing the total number of parts while maintaining precise positioning accuracy for each actuator through carefully designed geometric features.
Solution Approach 2:
The biasing member is segmented into multiple positioning portions, each capable of interacting with individual actuators. This segmentation allows the single component to provide precise positioning for multiple actuators independently, achieving the positioning accuracy of multiple separate biasing members while maintaining a unified, fewer-part structure.
3Volume of stationary object
If a single biasing member is used for multiple actuators, then device size is reduced, but positioning precision of each actuator may be compromised
Solution Approach 1:
The biasing member incorporates localized positioning portions with specific geometric features tailored for each actuator. Each positioning portion is designed with local quality - specific shapes, sizes, and orientations - to precisely position its corresponding actuator. This localized customization within the unified biasing member structure maintains high positioning precision for each actuator while keeping the overall device size reduced.
Solution Approach 2:
The biasing member acts as an intermediary structure that translates single-component biasing force into precise multi-point positioning. The positioning portions serve as intermediaries between the single biasing member and multiple actuators, ensuring that the reduced-size design does not compromise positioning precision by providing dedicated interface features for each actuator.
Data Source
AI summary
A blade drive device includes: a board including an opening; a blade movable between a position receding from the opening and a position covering at least a portion of the opening; a first actuator including a first rotor rotatable about a first axis and a first stator, and being capable of driving the blade; a second actuator including a second rotor rotatable about a second axis and a second stator, and being capable of driving the blade; first and second positioning portions respectively positioning the first and second actuators; and a first biasing member respectively biasing the first and second actuators toward the first and second positioning portions.