Kick-Down Doorstop With Clamp And Adjustable Leg
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Solution Overview
Problem
Existing kick-down doorstops require tools for installation, leave unsightly holes, and do not function well on uneven surfaces due to fixed leg lengths, posing installation and usage challenges, especially in rental properties and sloped areas.
Innovation Solution
A screw-less doorstop with a clamp-based engagement member and an adjustable leg member that can pivot and extend, allowing secure attachment to doors or windows without tools and accommodating varying surface angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If kick-down doorstops are permanently affixed to doors by screws, then the doorstop is securely attached to the door, but installation requires tools including drills and screwdrivers, and removal leaves permanent unsightly holes in the door
Solution Approach 1:
The doorstop is divided into separate components: a clamp assembly that attaches to the door and a leg assembly that provides the stopping function. This segmentation allows the clamp to be easily installed and removed without permanent attachment, while the leg provides the necessary mechanical function.
Solution Approach 2:
A clamp assembly serves as an intermediary between the doorstop and the door. This clamp provides a secure attachment mechanism that does not require permanent fastening, allowing the doorstop to be firmly held during use but easily removed when needed, avoiding permanent holes in the door.
2Strength
If kick-down doorstops are permanently affixed to doors by screws, then the doorstop is securely attached to the door, but repeated use places stress on the points of contact which can damage the door and loosen the screws
Solution Approach 1:
The clamp assembly acts as an intermediary that distributes the attachment forces across a larger area of the door rather than concentrating stress at single screw holes. This intermediary structure protects the door from damage while maintaining secure attachment during use.
Solution Approach 2:
The clamp assembly incorporates movable or adjustable elements that can adapt to different door surfaces and thicknesses, distributing contact forces more evenly and reducing stress concentration points that would otherwise damage the door or loosen fasteners.
3Device complexity
If kick-down doorstops have fixed length legs, then the structure is simple, but the doorstop does not function well when the support surface is uneven, for example on a slope or decline
Solution Approach 1:
The leg assembly incorporates adjustable length mechanisms or telescopic elements that allow the leg length to be modified based on the unevenness of the support surface. This dynamic adjustment capability enables the doorstop to function effectively on slopes and uneven ground while maintaining relatively simple overall structure.
Solution Approach 2:
The leg length parameter can be changed to accommodate different support surface conditions. By allowing the leg length to vary rather than being fixed, the doorstop adapts to uneven surfaces, slopes, and declines while the adjustment mechanism remains relatively simple.
4Strength
If kick-down doorstops are permanently affixed to doors, then the attachment is secure, but repair or replacement requires removing and reinserting screws which puts wear on the screw holes rendering them incapable of holding screws securely
Solution Approach 1:
The separation of the clamp assembly from the leg assembly allows the leg to be replaced independently without removing the clamp from the door. This segmentation enables easy repair or replacement of worn legs while the clamp remains securely attached, eliminating the need to repeatedly remove and reinsert fasteners into the door.
Solution Approach 2:
The clamp assembly serves as a permanent intermediary attached to the door, while the leg assembly can be easily swapped. This intermediary structure allows secure attachment to persist while the functional leg component can be replaced without disturbing the door-mounted clamp, simplifying repair operations.
Data Source
AI summary
A support apparatus comprising an engagement member having a plurality of walls integrally formed with each other and a support member. The support member includes a bracket member pivotably coupled to the engagement member and a leg member pivotably coupled to the bracket member. The bracket member comprises a plurality of fixing apertures corresponding to a fixing member extending from the engagement member. Each fixing aperture is configured to receive the fixing member. A pivot aperture is provided for receiving a pivot member which is configured to be received by a pivot support positioned on the engagement member. A biasing member is coupled to the pivot member such that the pivot member is movable with the bracket member away from the engagement member and such that the bracket member is rotatable when the pivot member is moved away from the engagement member. The leg member is adjustably extendable.