Integrally Molded Screw Retainer for Surface-Mount Housing
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Solution Overview
Problem
Installers face difficulties and safety hazards when mounting surface-mountable devices like security devices and thermostats, as they need to hold retaining screws in one hand while installing, making it cumbersome and unsafe.
Innovation Solution
A housing with an integrally molded, compressible and collapsible member-retaining portion that temporarily holds screws in place, allowing installers to use one hand for the housing and a screwdriver, eliminating the need to hold screws separately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If installers hold retaining screws separately in one hand while installing, then the screws can be positioned and inserted, but the installation process becomes cumbersome and unsafe
Solution Approach 1:
The patent combines the housing and screw retainer into a single integrated unit. The retainer is molded as part of the housing structure, eliminating the need for separate screw holding. This merging allows installers to hold only the housing while the retainer automatically captures and positions screws during installation, resolving the contradiction by improving ease of operation without compromising safety.
Solution Approach 2:
The retainer structure is designed to automatically capture and hold screws without requiring the installer to manually position or hold them. The spring-loaded or elastic retainer mechanisms self-activate when screws are introduced, performing the screw-holding function automatically. This self-service capability eliminates the need for two-handed operation, improving safety while maintaining ease of installation.
2Ease of operation
If installers use one hand to hold both housing and screws, then the installation process simplifies, but it becomes physically difficult and unsafe to climb ladders
Solution Approach 1:
By merging the housing and retainer into one integrated component, the patent reduces the number of separate items the installer must handle. The installer holds only the housing, which contains the integrated retainer, eliminating the need to separately manage screws and retainers. This simplification directly addresses the contradiction by reducing installation complexity while maintaining ease of operation.
3Ease of operation
If the member-retaining portion is compressible and collapsible, then screws can be easily inserted and held in place, but the housing structure becomes more complex
Solution Approach 1:
The patent employs flexible retainer elements made from elastomeric or polymer materials that can compress and collapse. These flexible components are molded into the housing structure, allowing them to deform elastically when screws are inserted and then maintain holding pressure. This approach achieves easy screw insertion while keeping the overall housing structure relatively simple by using material flexibility rather than complex mechanical mechanisms.
Solution Approach 2:
The retainer structure utilizes changes in physical parameters, specifically elastic deformation and compressibility, to achieve screw retention. By designing the retainer with appropriate material properties and geometric features, it can transition between expanded and compressed states during screw insertion, then maintain a stable holding state. This parameter-based approach simplifies the structure compared to rigid mechanical retention systems.
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
Enables safe and efficient installation of surface-mountable devices by allowing installers to manage screws with one hand, reducing the risk of accidents and simplifying the mounting process.
Implementation Method 1
The member-retaining portion is compressible and/or collapsible so that when a surface-mounting member is inserted therethrough so as to force the surface-mountable housing portion against a surface such as a wall, the member-retaining portion is substantially compressed and/or collapsed between a head portion of the surface-mounting member and the housing portion.
Data Source
AI summary
The present invention is a housing for a surface-mountable device such as a security device (a PIR, a microwave motion detector, and the like). The housing has a surface-mountable housing portion with at least one aperture for receiving a surface-mounting member therethrough, the housing portion fabricated substantially from a plastic material. A member-retaining portion is integrally molded with the housing portion and extends substantially perpendicular from said housing portion, said member-retaining portion adapted to receive a surface-mounting member when inserted therethrough and retain said surface-mounting member in place. As a result of this configuration, when a surface-mounting member such as a screw is inserted therethrough, the surface-mounting member is held in place by the member-retaining portion and is insertable through the aperture when pressure is applied thereto. Preferably, the aperture is circular and the member-retaining portion is substantially cylindrical with at least one slot extending along said member-retaining portion. The member-retaining portion is adapted so as to allow a user to push a surface-mounting member therethrough and to hold the surface-mounting member in place. The member-retaining portion is compressible and/or collapsible so that when a surface-mounting member is inserted therethrough so as to force the surface-mountable housing portion against a wall, the member-retaining portion is substantially compressed and/or collapsed between a head portion of the surface-mounting member and the housing portion.