Central Shutter Spring Energy Storage Mechanism
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Solution Overview
Problem
Existing central shutters for camera lenses have high mechanical complexity, leading to wear and vibration issues, and require powerful motors for short opening times, resulting in increased power consumption and noise.
Innovation Solution
The drive for pivoting shutter blades is divided into two parts, where a continuously motor-driven winding ring tensions a spring, which then powers the shutter blades, reducing the need for high-power motors and minimizing wear and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a powerful motor is used to achieve short opening times, then the shutter speed is improved, but the power consumption and noise increase
Solution Approach 1:
The spring is pre-tensioned during the winding phase before the shutter opening is required. This preliminary action stores energy in the spring, which is then released to pivot the shutter blades quickly when needed, eliminating the need for high-power motors during the actual shutter operation.
Solution Approach 2:
The spring acts as an intermediary energy storage element between the motor and the shutter blades. The motor only needs to provide low power to wind the spring, while the spring releases stored energy to accelerate the shutter blades, thus reducing both power consumption and noise during shutter operation.
2Speed
If a powerful motor is used to achieve short opening times, then the shutter speed is improved, but the noise increases
Solution Approach 1:
The spring is pre-tensioned during the winding phase before the shutter opening is required. This preliminary action stores energy in the spring, which is then released to pivot the shutter blades quickly when needed, eliminating the need for high-power motors during the actual shutter operation.
Solution Approach 2:
The spring acts as an intermediary energy storage element between the motor and the shutter blades. The motor only needs to provide low power to wind the spring, while the spring releases stored energy to accelerate the shutter blades, thus reducing both power consumption and noise during shutter operation.
3Ease of operation
If a complex mechanical drive system is used, then the shutter operation is achieved, but the number of components and wear increase
Solution Approach 1:
The drive system is segmented into two distinct phases: a winding phase where the motor tensions the spring, and a release phase where the spring pivots the shutter blades. This segmentation simplifies the mechanical system by eliminating the need for complex continuous drive mechanisms and reducing the number of moving components.
Solution Approach 2:
The spring acts as an intermediary energy storage element between the motor and the shutter blades. The motor only needs to provide low power to wind the spring, while the spring releases stored energy to accelerate the shutter blades, thus reducing both power consumption and noise during shutter operation.
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 solution reduces the number of components, power consumption, and vibration, enabling faster and quieter shutter operation with lower wear, while allowing for compact and efficient use in interchangeable lenses.
Implementation Method 1
a tension spring (9) suspended between the two elements can be tensioned when the cam ring (7) is blocked. The energy then stored in the tension springs is subsequently used, after the cam ring (7) has been released, for pivoting the shutter blades coupled to the cam ring (7)
Data Source
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AI summary
The invention relates to a central shutter for camera objectives, having a ring-shaped leaf carrier (1) enclosing the shutter opening (2), on which at least two studs (13) are disposed circularly symmetrically to each other, on which sickle-shaped shutter leaves (14) are pivotally supported, and having an electric motor drive pivoting the shutter leaves (14) over the shutter opening (2), characterized in that the drive comprises a motorized rotatable winding ring (3) designed as a flat ring disc and contacting the leaf carrier (1), a cam ring (7) designed as a flat ring disc is rotatably supported in the winding ring (7), sawtooth-shaped cams (17) being located on one ring surface thereof, wherein the winding ring (3) and the cam ring (7) are coupled to each other by means of at least one tension spring (9) that can be tensioned in the rotary direction of the winding ring (3), and the pivot motion of the shutter leaves (14) can be controlled by coupling to the cam ring (7).