Dual-Surface Door Stopper With Carpet Claws and Suction Grip
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Solution Overview
Problem
Conventional door stoppers fail to effectively prevent doors from sliding on both carpeted and smooth surfaces, with existing solutions providing inadequate suction on carpets and poor stopping effect on smooth floors.
Innovation Solution
A dual-purpose door stopper comprising a rigid inner core with a rubber-coated positioning ring, an outer anti-sliding body with a clamping groove, carpet claws with conical claw bodies, and blocking ribs, designed to securely engage with both carpeted and smooth surfaces through a combination of clamping and frictional forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suction cup is used to attach the door stopper to the floor, then the suction effect is improved on smooth surfaces, but the stopping effect deteriorates on carpeted floors
Solution Approach 1:
The door stopper is divided into two functional parts: a suction cup component for smooth surfaces and a carpet claw component for carpeted surfaces. This segmentation allows each component to be optimized for its specific surface type, resolving the contradiction between suction effectiveness and adaptability across different floor types.
Solution Approach 2:
Different parts of the door stopper have different structural properties tailored to specific surfaces. The suction cup provides strong attachment on smooth surfaces through vacuum pressure, while the carpet claw provides mechanical interlocking on carpeted surfaces. This local differentiation of quality resolves the contradiction by making each part specialized for its intended surface type.
2Device complexity
If a simple friction-based door stopper is used, then the device complexity is reduced, but the stopping effect deteriorates on smooth surfaces with large opening forces
Solution Approach 1:
The traditional friction-based mechanical attachment is replaced with a suction cup mechanism that utilizes atmospheric pressure and vacuum forces. This substitution provides significantly stronger attachment force on smooth surfaces without substantially increasing device complexity, as the suction cup is a simple cup-shaped component.
3Adaptability or versatility
If the door stopper body is made entirely of soft rubber, then the adaptability to different surfaces is improved, but the structural strength deteriorates
Solution Approach 1:
The door stopper combines different materials with complementary properties: a suction cup component (typically hard or semi-hard rubber) for strong attachment on smooth surfaces, and a carpet claw component (softer material) for penetrating and gripping carpeted surfaces. This composite construction resolves the contradiction by assigning different material properties to different functional components.
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
The door stopper provides stable fixation on both carpeted and smooth surfaces, enhancing security and preventing sliding, with the ability to be assembled and disassembled for versatile use.
Implementation Method 1
Under the action of the pressure difference between the atmosphere and the inner chamber formed between the suction surface and the floor, the suction cup keeps sucking the floor
Implementation Method 2
a plurality of suction members, and the plurality of suction members are distributed at intervals on the mounting plane. The suction member is provided with a downward suction surface
Implementation Method 3
a carpet claw in contact with the hair surface and smooth surface for achieving the anti-sliding purpose
Implementation Method 4
the back side of the door stopper abuts downwards against the gap between the door body and the floor and is in contact with the smooth surface
Data Source
Figure 1
AI summary
A door stopper used for hair and smooth surfaces comprising a rigid inner core; the rigid inner core is configured to be a slope structure; a concave surface at one end of the bottom surface of the end portion of the rigid inner core is provided with a rubber-coated positioning ring for positioning during the injection molding process; a circular soft magnet sheet is embedded in a lower end surface of the rigid inner core; the carpet claw may be assembled in and disassembled from the clamping groove of the outer anti-sliding body, and the outer anti-sliding body wraps the rigid inner core first and then is embedded into the carpet claw; the rubber-coated positioning ring is used for positioning the outer anti-sliding body during injection molding, and the soft magnet sheet is embedded in the outer anti-sliding body with one side exposed for being in contact with the outside.