Dual-Shield Blind Clutch Mechanism for Single-Cord Operation
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Solution Overview
Problem
Conventional blinds with two solar radiation shields require multiple parts and a larger size due to separate clutch units for each shield, increasing complexity and size for the operation device.
Innovation Solution
A blind design utilizing a single operating mechanism with a clutch that axially slides and rotates, transmitting force to either driving shaft based on the rotational direction, reducing the number of parts and size by integrating ratchet protrusions and transmission members for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate clutch units are provided for each solar radiation shield, then independent operation of each shield is achieved, but the number of parts increases and the size of the head box increases
Solution Approach 1:
The patent combines two separate clutch units into a single clutch unit that can control both solar radiation shields. The clutch unit includes a single operating cord that can selectively engage with either the first or second driving shaft through a switching mechanism, thereby reducing the number of parts while maintaining independent operation capability of each shield.
Solution Approach 2:
The single clutch unit is designed to perform multiple functions by selectively engaging with different driving shafts. The operating cord can be switched to control either the first solar radiation shield or the second solar radiation shield, making the clutch unit universal and multi-functional rather than dedicated to a single shield.
2Adaptability or versatility
If separate clutch units are provided for each solar radiation shield, then independent operation of each shield is achieved, but the size of the head box increases
Solution Approach 1:
The patent combines two separate clutch units into a single clutch unit that can control both solar radiation shields. The clutch unit includes a single operating cord that can selectively engage with either the first or second driving shaft through a switching mechanism, thereby reducing the number of parts while maintaining independent operation capability of each shield.
3Ease of operation
If one operating cord controls both shields through separate clutch units, then independent operation is possible, but the operation mechanism becomes more complex
Solution Approach 1:
The patent combines two separate clutch units into a single clutch unit that can control both solar radiation shields. The clutch unit includes a single operating cord that can selectively engage with either the first or second driving shaft through a switching mechanism, thereby reducing the number of parts while maintaining independent operation capability of each shield.
Data Source
AI summary
In a blind with two shields, it is possible to perform different operations by operating one operating means and reduce the dimension of an operating device by reducing the number of parts. The operating device comprises an operating shaft rotated upon receiving an operation force, a clutch rotating integrally with the operating shaft and axially sliding on the operating shaft, and a first transmission member 50 and a second transmission member disposed at both axial sides of the clutch to transmit driving force to a first driving shaft and a second driving shaft, respectively. The sliding direction of the clutch is determined by the rotational direction of the operating shaft, such that as the clutch sliding on the operating shaft is engaged with one of the transmission members and, the rotation of the operating shaft is transmitted to any one of the driving shafts and through one of the transmission members and.