Door Lock Handle Bushing Elastic Stop Ring Assembly
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Solution Overview
Problem
Existing manual control devices for door or window locks are often difficult to assemble, require special tools, and are not adaptable to different door or window sizes, leading to complex inventory management and logistics.
Innovation Solution
A manual control device featuring an elastic open stop ring housed in an outer circumferential groove of a bushing, allowing for easy assembly and adaptation to various door or window sizes, with quick locking means to prevent extraction of the pin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device is designed as a complete pre-assembled unit, then installation is simplified, but adaptability to different door or window sizes is lost
Solution Approach 1:
The device is divided into separate modular components: a control device body, a bushing with stop ring, and a square pin. These segments can be independently selected and assembled to match different door or window configurations, providing both installation simplicity and adaptability.
Solution Approach 2:
The control device is designed with universal mounting features and adjustable components that can accommodate various door and window types. The bushing and stop ring assembly can be configured for different hole sizes and positions, making the same basic device applicable to multiple applications.
2Manufacturing precision
If special tools are required for assembly, then precise assembly is achieved, but assembly time and complexity increase
Solution Approach 1:
The stop ring is designed to be self-installing onto the bushing through elastic deformation. The installer simply needs to compress the elastic stop ring and place it on the bushing, where it automatically expands to engage with the groove. This self-service mechanism eliminates the need for special assembly tools while maintaining precise positioning.
Solution Approach 2:
The stop ring's elastic properties allow it to change its dimensional parameters (compressing and expanding) during installation. This parameter change enables the stop ring to be installed without special tools while still achieving precise fitting and positioning in the groove.
3Adaptability or versatility
If multiple product variants are produced for different door sizes, then adaptability is improved, but inventory management and logistics become complex
Solution Approach 1:
A single universal control device design incorporates adjustable and interchangeable components (bushing, stop ring, square pin) that can be configured for different door and window sizes. This universality allows manufacturers to maintain a single product line while still meeting diverse customer requirements, greatly simplifying inventory management and logistics.
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 device can be easily and quickly assembled at the installation site, is adaptable to different door or window sizes, simplifies logistics, and ensures stable fixing and balanced forces on the components.
Implementation Method 1
The stop ring 10 is elastic in order to be able to expand and contract
Data Source
Figure 1~4
AI summary
The manual control device (1) for manually controlling a lock of a door or window, comprising a handle (2) having a grip (8) and an axially hollow neck (7), an activation pin (4) of the lock, a block (3) for fixing the device (1) to a profile of a door or window, and a rotation bushing (5) for rotating the handle (2) which extends from the neck (7) of the handle (2) and is arranged through a hole (6) of the block (3), the pin (4) being arranged through the hole (6) of the block (3) and having a front end engaged in the bushing (5), being further provided at least one stop ring (10) for the extraction of the bushing (5) from the hole (6) of the block (3).