Suction Head Rotating Brush Closure Cap with Cam-Based Locking
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Solution Overview
Problem
Existing suction head cleaning units face difficulties in providing easy and ergonomic locking and unlocking of the rotating brush, requiring excessive user effort and potentially leading to loose or stuck closures due to inconsistent tightening.
Innovation Solution
The suction head cleaning unit incorporates a closure cap with a mobile locking organ and an actuation organ that moves between action positions, utilizing cam surfaces to smoothly transition between locking and release positions, ensuring secure and effortless engagement and disengagement of the rotating brush.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thread locking mechanism is used to secure the closure cap on the main body, then the locking reliability is improved, but the ease of operation deteriorates due to excessive user effort and random tightening results
Solution Approach 1:
The patent replaces the traditional thread-based mechanical locking system with a cam-based locking mechanism. The cam surface converts rotational motion into linear displacement of the locking organ, eliminating the need for users to exert excessive screwing effort while maintaining secure locking through the geometric constraints of the cam profile.
Solution Approach 2:
The patent changes the locking mechanism from a threaded connection (requiring rotational torque) to a cam-driven system where the locking force is generated through the cam surface geometry. This parameter change transforms the user interaction from high-effort screwing to low-effort cam actuation, improving ease of operation while maintaining locking reliability.
2Reliability
If the closure cap is tightened excessively to prevent loosening during rotation, then the reliability of brush retention is improved, but the ease of operation deteriorates due to abnormally high loosening torque
Solution Approach 1:
The patent replaces the threaded locking system with a cam-based system where the locking organ engages with a cam surface. This substitution allows the locking force to be applied precisely where needed while enabling easy release through cam disengagement, eliminating the problem of excessively high loosening torque associated with threaded connections.
Solution Approach 2:
The patent introduces a dynamic locking mechanism where the locking organ can transition between locked and unlocked positions through cam actuation. This dynamic system allows for secure locking during operation while enabling easy unlocking when needed, unlike static threaded connections that require high torque for both locking and unlocking.
3Device complexity
If a simple closure cap design is used, then the device complexity is reduced, but the reliability of locking deteriorates due to loose fitting under vibration
Solution Approach 1:
The patent replaces simple friction-based or basic snap-fit closure caps with a cam-based locking mechanism. This substitution provides positive mechanical engagement through the cam surface and locking organ interaction, ensuring reliable locking that resists vibration and loosening while maintaining relatively simple overall device architecture.
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 configuration simplifies the locking and unlocking process, reducing user effort and ensuring reliable locking, enhancing user comfort and the stability of the rotating brush within the reception accommodation.
Implementation Method 1
The actuation organ has at least one cam surface and at least one locking organ has at least one contact surface which contacts the cam surface and which is configured to move along the surface of camsuch that when the acting organ is moved between the first action position and the second position of actuation, the contact surface moves along the cam surface to cause the displacement of the at least oneLocking organ between the release position and the locking position.
Data Source
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AI summary
The cleaning unit (11) includes a rotating brush (12) which is configured to be removably mounted in a housing for receiving a suction head, and a closing plug (16) which is configured to close a passage opening (13) through which the rotating brush (12) is able to be inserted into and removed from the housing,the closure cap (16) comprising a cap body (17) and at least one locking member (18) which is movable relative to the cap body (17) between a locked position in which the at least one locking member (18) cooperates with at least one locking element provided on the suction head so as to prevent the rotary brush (12) from being withdrawn from the receiving housing and a release position in which the at least one locking member (18) releases the at least one locking element so as to allow the rotary brush (12) to be withdrawn from the receiving housing.