Door Handle Switch Unit Mounting via Single Supporting Shaft
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Solution Overview
Problem
Conventional door handle devices require multiple parts and complex assembly processes due to the need for fixing members like screws and bolts to secure the switch unit, making it difficult to reduce the number of parts and simplify the mounting process.
Innovation Solution
A door handle device design where the switch unit is fixed to a mounting bracket using a supporting shaft that inserts into a handle shaft insertion hole and a bracket shaft insertion hole, eliminating the need for additional fixing members and allowing the switch unit to be mounted without screws or bolts, with optional engaging grooves or through-holes for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixing members such as screws and bolts are used to secure the switch unit to the mounting bracket, then the switch unit can be reliably fixed, but the number of parts increases and the assembly process becomes complex
Solution Approach 1:
The supporting shaft is designed to perform multiple functions simultaneously: it serves as both the pivot connection element for the door handle and the fixing member for the switch unit. By integrating these two functions into a single component, the patent eliminates the need for separate fixing members like screws and bolts, thereby reducing part count and simplifying assembly while maintaining reliable fixation of the switch unit
Solution Approach 2:
The supporting shaft is designed as a multi-functional component that provides both the pivot connection between the door handle and mounting bracket, and the fixation of the switch unit to the mounting bracket. This universal component approach allows a single element to fulfill multiple roles, reducing overall device complexity while ensuring reliable assembly
2Reliability
If fixing members are used to secure the switch unit, then the switch unit can be firmly mounted, but the working time for assembly increases
Solution Approach 1:
The supporting shaft integrates the pivot connection function and switch unit fixation function into a single component. This merging eliminates the need for separate fixing operations with screws or bolts, allowing the switch unit to be firmly mounted through the single supporting shaft structure, thereby reducing assembly steps and improving productivity
Solution Approach 2:
The supporting shaft is pre-designed with the capability to perform both pivot connection and switch unit fixation functions. By preparing this multi-functional component in advance, the assembly process requires only a single installation operation rather than multiple sequential steps, thus reducing working time while ensuring mounting stability
3Device complexity
If the switch unit is directly fixed to the door without a mounting bracket, then the number of parts is reduced, but the working property of mounting deteriorates
Solution Approach 1:
The mounting bracket is designed as a multi-functional component that provides both structural support for the door handle assembly and a convenient mounting surface for the switch unit. By giving the mounting bracket this dual function, the patent maintains good working properties for switch unit installation while keeping the overall part count reasonable, as the mounting bracket serves multiple purposes in the assembly
Data Source
Figure 1~2
Figure 3~4
Figure 5(a)~5(b)
AI summary
A door handle device is provided with: a door handle 9 by which the door of a vehicle can be opened and closed; a mounting bracket 11 for supporting the door handle 9 through a supporting shaft 15 so that the door handle can be swung in the back-and-forth direction with respect to the door 3 of the vehicle; and a switch unit 13, which is arranged between the door handle 9 and the mounting bracket 11, which generates an electric signal for locking and unlocking a door lock provided in the door of the vehicle. A contact portion (an engaging groove 27), with which the supporting shaft 15 comes into contact, is formed in the switch unit 13. When the supporting shaft 15 is inserted into a handle shaft insertion hole 9b and a bracket shaft insertion hole 11a so that the supporting shaft 15 can be engaged with the holes by an engaging grove 27, the switch unit is fixed to the mounting bracket.