Vehicle Door Handle with Self-Engaging Torsion Spring
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Solution Overview
Problem
The existing door handle device for vehicles requires a lot of labor and time for assembly due to the need for fixing pieces to be fastened to the frame using nuts and bolts, and it also experiences rattling issues during operation.
Innovation Solution
A door handle device with a base member and handle grip that incorporates a resilient double torsion spring with locking portions and coil portions, which is hooked to the base member by its biasing force, eliminating the need for fastening members and preventing rattling through engagement with recessed portions on the handle grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixing piece is fastened to the frame using nuts and bolts to prevent handle grip rattling, then the handle grip is securely fixed, but the assembly process requires a lot of labor and time
Solution Approach 1:
The resilient member automatically engages with the handle grip through its own biasing force, eliminating the need for manual fastening operations. The resilient member self-secures the handle grip to the base member without requiring external fastening components or manual assembly steps.
Solution Approach 2:
The invention removes the nuts and bolts from the assembly by using the resilient member's biasing force to create a self-contained fixation mechanism. The fastening function is extracted from the traditional mechanical fastener system and integrated into the resilient member itself.
2Reliability
If nuts and bolts are used to fasten the fixing piece, then the handle grip is securely attached, but the assembly operation becomes complex and time-consuming
Solution Approach 1:
The resilient member performs the attachment function automatically through its biasing force, eliminating the need for complex fastening procedures. The system self-completes the attachment operation without requiring manual manipulation of separate fastening components.
Solution Approach 2:
The invention merges the attachment function with the resilient member's biasing force, combining what were previously separate functions (fastening mechanism and resilient member) into a single integrated component that performs both functions simultaneously.
3Reliability
If traditional fastening members are used, then the handle grip can be securely fixed, but the assembly process loses time and labor
Solution Approach 1:
The resilient member automatically secures the handle grip through its inherent biasing force, eliminating the need for time-consuming manual fastening operations. The self-service mechanism completes the fixation process instantly upon assembly without requiring additional assembly time.
Solution Approach 2:
The resilient member is pre-configured with its biasing force to automatically perform the fixation action during assembly. The preliminary preparation of the resilient member's biasing mechanism ensures that the fixation occurs automatically without requiring additional assembly steps or time.
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 solution enhances ease of assembly and prevents rattling, ensuring reliable operation by automatically engaging the resilient member with the handle grip, reducing the risk of accidental actuation and maintaining engagement even during vibrations.
Implementation Method 1
a resilient member having a restriction portion extending between the pair of supporting boards of the base member, and hooked to the supporting boards of the base member by its own biasing force
Implementation Method 2
the resilient member is formed of a double torsion spring including locking portions provided on ends thereof, respectively, and coil portions provided between the locking portions and the restriction portion
Data Source
AI summary
A door handle device includes: a base member having handle supporting portions provided between a pair of supporting boards facing each other; a handle grip provided with an arm portion protruding at one end of the handle grip, shaft support portions provided on an extreme end of the arm portion and pivotally supported by the handle supporting portions of the base member, and an operating portion provided at the other end of the handle grip and configured to operate a lever provided on the base member; and a double torsion spring having a restriction portion extending between the pair of supporting boards of the base member, and hooked to the supporting boards of the base member by its own biasing force, in which a recessed portion with which the restriction portion of the double torsion spring is engaged is formed in the arm portion of the handle grip.