Hinge Device Non-Circular Spring End
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Solution Overview
Problem
Conventional furniture hinges with springs tend to break over time due to improper mounting and positioning of the sliding element, leading to compromised functionality.
Innovation Solution
A hinge device featuring a sleeve member and an elastic member with a non-circular cross section, where the sleeve member is securely attached to the elastic member and in contact with a cam, providing a stable connection that prevents the elastic member from dislodging and enhances the hinge's operational quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a circular cross section is used for the spring end portion and sliding element, then the manufacturing is simpler, but the sliding element cannot be securely positioned and may fall off
Solution Approach 1:
The patent applies asymmetry by changing the cross-sectional shape of the spring end portion from circular to non-circular (such as D-shaped or oval). This asymmetric shape creates a unique fit within the sliding element's cavity, preventing the sliding element from rotating or falling off while maintaining manufacturing feasibility. The non-circular cross section provides geometric constraints that secure the positioning without requiring additional attachment devices.
2Reliability
If an attachment device is added to connect the sliding element and spring, then the positioning reliability improves, but the device complexity increases
Solution Approach 1:
The patent merges the connection function into the geometric shape of the spring end portion itself. By making the cross section non-circular, the spring's shape directly provides the positioning and securing function that would otherwise require a separate attachment device. This integration eliminates additional components while maintaining reliable connection, thereby reducing device complexity.
Solution Approach 2:
The spring end portion's non-circular cross section enables self-positioning and self-securing within the sliding element. The geometric shape automatically prevents dislodgement without requiring external attachment mechanisms, allowing the spring itself to serve the dual purpose of providing elastic force and securing the connection.
3Reliability
If the sliding element is engaged in the spring coils via attachment device, then the connection is secure, but the mounting tolerance requirements become stricter and quality of use is compromised
Solution Approach 1:
The non-circular cross section creates a geometric lock that is tolerant to mounting variations. The asymmetric shape provides inherent alignment guidance and accommodates reasonable tolerance ranges during assembly, reducing the strictness of mounting tolerance requirements while maintaining secure connection.
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 non-circular cross section of the elastic member's end portion securely mounts within the sleeve member's cavity, ensuring the elastic member remains in place, reducing the likelihood of breakage and improving the hinge's durability and functionality.
Implementation Method 1
The fitting is able to be driven to pivot with respect to the connecting arm by an elastic force generated by the elastic member
Data Source
AI summary
A hinge device includes a fitting, a connecting arm, a cam, an elastic member, and a sleeve member. The connecting arm is pivotally connected to the fitting. The cam is located at the connecting arm. The elastic member is mounted to the fitting and includes an end portion having a non-circular cross section. The sleeve member is attached to the elastic member and is in contact with the cam. The sleeve member includes a cavity in which the end portion of the elastic member can be mounted.