Door Handle Electronic Unit Segmentation for Assembly
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Solution Overview
Problem
Existing door handle designs for motor vehicles face difficulties in assembly and maintenance due to complex electrical connections in small, non-visible spaces, making them challenging to produce in large series and increasing maintenance costs, with limited flexibility for repairs or upgrades.
Innovation Solution
The handle part features a base body with a cavity and an electronics unit that uses form-fitting means, such as plug connections and cantilever mounts, for precise positioning and electrical contact, allowing for easy assembly, maintenance, and potential upgrades, while sealing to protect against moisture and overmolding materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic components are mounted on a printed circuit board and connected by soldering in a small cavity, then electrical connection is achieved, but assembly becomes difficult and time-consuming
Solution Approach 1:
The electronics unit is separated from the base body as an independent module that can be pre-assembled and tested separately, then inserted as a complete unit into the cavity. This segmentation allows complex electrical connections to be made in a controlled environment before final assembly, improving both reliability and manufacturing ease.
Solution Approach 2:
A plug connection serves as an intermediary element between the base body and the electronics unit. This mediator provides a standardized interface that simplifies the connection process, enabling reliable electrical contact without requiring complex soldering operations in the final assembly step.
2Strength
If the door handle unit is cast once with all components, then structural integrity is improved, but repair and expansion become difficult
Solution Approach 1:
The door handle is divided into separable modules: the base body and the electronics unit. The electronics unit can be removed and replaced independently while maintaining structural integrity through the plug connection interface. This modularity enables easy repair and expansion without compromising overall strength.
Solution Approach 2:
The plug connection provides a dynamic, reversible joining mechanism that allows the electronics unit to be inserted and removed multiple times. This dynamic connection maintains structural integrity during operation while enabling flexibility for repair and upgrades.
3Volume of moving object
If electrical conductors are routed into a small cavity, then compact design is achieved, but electrical contacting becomes difficult in non-visible space
Solution Approach 1:
All electrical connections are established in advance during the production of the electronics unit module, before the unit is inserted into the cavity. This preliminary action eliminates the need to perform delicate electrical contacting operations in the confined, non-visible space of the cavity during final assembly.
Solution Approach 2:
The plug connection acts as an intermediary that provides accessible connection points on the electronics unit, allowing electrical contacts to be made outside the cavity during module assembly, then maintaining compact routing within the cavity during final installation.
4Adaptability or versatility
If multiple door handle variants are produced to accommodate different sensor configurations, then functionality is improved, but manufacturing complexity and maintenance costs increase
Solution Approach 1:
The base body and plug connection are designed as universal components that can accommodate different electronics units with various sensor configurations. This universal interface allows a single base body design to support multiple functional variants, reducing overall system complexity and manufacturing costs.
Solution Approach 2:
The sensor-specific electronics are separated into replaceable modules that can be swapped into the universal base body. This segmentation allows different sensor configurations to be implemented without redesigning the entire door handle, simplifying manufacturing and maintenance.
Data Source
Figure 1~2
Figure 3~4
AI summary
The device has a base body (3) with at least one cavity (4) into which at least one electrical conductor (5) leads, at least one electronic unit (6) for arrangement in the cavity and for connection to the at least one electrical conductor and an interacting arrangement for positioning the electronic unit relative to the conductor(s) in the cavity and on the electronic unit.