Telescopic Connection Box Sleeve for Flush Wall Installation
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Solution Overview
Problem
The challenge in wall mounting connection box units is that the position, particularly the installation depth, is not precisely predetermined until the building wall is completed, making it difficult to achieve a flush-mounted installation without requiring complex trimming of protruding sleeve parts.
Innovation Solution
A wall installation connection box unit with a telescopically movable extension sleeve and a retaining structure that allows axial adjustment and secure retention, using a retaining ridge structure made of sealing resilient material and a counter-retaining structure of greater stiffness for reliable sealing and securing, along with a detachable spacer element for preassembly and secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the extension sleeve is made fixed-length, then the manufacturing is simple, but the installation depth cannot be adjusted to achieve flush mounting with finished wall surfaces
Solution Approach 1:
The extension sleeve is designed with telescopic capability, allowing it to dynamically adjust its effective length between a retracted position (for flush mounting) and an extended position (for installation access). This dynamic adjustment mechanism resolves the contradiction by enabling the same component to serve both adjustment and simplicity functions at different installation stages.
Solution Approach 2:
The extension sleeve is divided into multiple telescopic segments that can slide relative to each other, allowing incremental adjustment of the sleeve length. This segmentation enables precise depth control while maintaining a compact storage configuration, balancing adjustability with structural simplicity.
2Manufacturing precision
If the extension sleeve is made telescopic for adjustment, then the flush installation is achievable, but the retention and sealing reliability becomes challenging
Solution Approach 1:
A sealing element (such as a gasket or O-ring) is introduced as an intermediary component between the extension sleeve and the box housing body. This sealing element ensures reliable fluid-tight sealing while accommodating the telescopic movement, thus maintaining sealing reliability despite the adjustable nature of the extension sleeve.
Solution Approach 2:
The retaining structure is designed with pre-positioned engagement features (such as ribs, grooves, or snap-fit elements) that automatically lock the extension sleeve at the desired retracted position. This preliminary retention mechanism ensures that once the sleeve is adjusted to the flush position, it is securely held there without requiring additional fastening operations, thereby maintaining both precision and reliability.
3Ease of operation
If the extension sleeve protrudes far for easy installation, then the mounting is convenient, but the trimming complexity increases after wall completion
Solution Approach 1:
The extension sleeve's telescopic design allows it to be extended during installation for easy access and operation, then retracted after installation to achieve a flush finish with the wall surface. This dynamic length adjustment eliminates the need for trimming, as the sleeve can be positioned precisely at the desired depth without protruding permanently.
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 precise adjustment and secure retention of the extension sleeve to achieve a flush installation with the finished wall surface, eliminating the need for complex trimming and ensuring reliable sealing and secure mounting.
Implementation Method 1
cooperating with the retaining ridge structure in a frictionally engaged and/or form-locking manner
Implementation Method 2
retaining ridge structure made of sealing resilient material
Data Source
AI summary
A wall installation connection box unit, including a box housing body having a rear-side base portion and a sleeve portion projecting forward from the base portion, which sleeve portion peripherally surrounds an installation component mounting space, which space is accessible via an open front end face of the sleeve portion, an extension sleeve which is configured for coaxial arrangement on the sleeve portion and axial pushing back relative to the sleeve portion, and a retaining structure which allows axial pushing back of the extension sleeve on the sleeve portion from a mounting position to an end use position on variable axial level and retains the extension sleeve in the end use position on the sleeve portion. Illustratively, the retaining structure includes a retaining ridge structure radially projecting from the sleeve portion, which is formed integrally with at least one adjacent axial partial region of the sleeve portion from a sealing resilient material, and a counter-retaining structure cooperating with the retaining ridge structure in a frictionally engaged and/or form-locking manner, provided on the extension sleeve and made from a material which has greater stiffness as compared to the sealing resilient material. In addition or as an alternative, the wall installation connection box unit includes a spacer element which is attachable to the box housing body in a securing position in a detachable manner, where the spacer element secures the extension sleeve in the mounting position against axial pushing back.