Key Device Assembly with Integrated Torsion Spring
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Solution Overview
Problem
Existing key devices face difficulties in assembling and mounting the lifter, lock plate, and torsion spring due to the need for separate assembly, making the process complex and challenging.
Innovation Solution
A key device design that includes a rotating member, an allowing member, a regulating member, and an urging member, with holding portions and guiding portions to facilitate easy assembly and rotation control, allowing the members to be assembled and held securely, enabling easy assembly and rotation regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lifter, lock plate and torsion spring are assembled separately to the support shaft, then each component can be independently manufactured and replaced, but the assembly and mounting process becomes complex and difficult
Solution Approach 1:
The patent combines the lifter, lock plate, and torsion spring into a single integrated assembly unit that is mounted to the support shaft as one piece. This merging of components simplifies the assembly process while maintaining the functional independence of each component through internal design features.
Solution Approach 2:
The integrated assembly is designed with internal segmentation that allows each component (lifter, lock plate, torsion spring) to remain functionally independent and replaceable, while presenting a unified structure for mounting to the support shaft.
2Ease of manufacture
If the lifter, lock plate and torsion spring are assembled separately to the support shaft, then each component can be independently manufactured, but the mounting process becomes time-consuming and labor-intensive
Solution Approach 1:
By merging the lifter, lock plate, and torsion spring into a single assembly unit, the patent reduces the number of separate mounting operations required, thereby improving assembly efficiency and productivity without sacrificing component independence.
Solution Approach 2:
The components are pre-assembled into an integrated unit before mounting to the support shaft, performing the assembly action in advance to simplify the final installation process and reduce mounting time.
3Adaptability or versatility
If separate assembly of lifter, lock plate and torsion spring is used, then component replacement is flexible, but the assembly process is difficult and error-prone
Solution Approach 1:
The patent merges the components into a single assembly unit with internal design features that maintain component replaceability, while the external unified structure simplifies the assembly operation and reduces errors.
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 design simplifies the assembly process and ensures secure holding of the allowing and regulating members, allowing for effective rotation control and easy disassembly, thereby improving the assembly efficiency and reliability of the key device.
Implementation Method 1
a torsion spring, which is elastically deformed when the lifter and the lock plate are rotated, is held by the support shaft
Implementation Method 2
an urging member having urging force, that causes the allowing member and the regulating member to be assembled by being held by the pair of holding portions
Data Source
AI summary
A regulating member, an allowing member and an urging member are easily assembled to a subject to which these members are assembled. When assembling of an interlock unit is carried out, with a fitting convex portion of a link being fitted into a fitting concave portion of a release link, a torsion spring (particularly, a connecting portion) is temporarily elastically deformed, and a pair of spiral portions of the torsion spring are mounted to spring holding shafts of the link and the release link, respectively. As a result, the link, the release link and the torsion spring can be brought into a temporarily assembled state, and can be easily assembled to a unit box.