Interchangeable Door Handle Assembly with Universal Actuating Mechanism
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Solution Overview
Problem
Conventional door handle assemblies are limited in that the indoor and outdoor handgrips can only be attached or replaced on their respective sides of the door panel, lacking flexibility in manufacturing and replacement.
Innovation Solution
A door handle assembly design featuring interchangeable indoor and outdoor handle devices with identical actuating mechanisms, allowing easy manufacturing, quick attachment, and replacement, utilizing a lock casing with inner and outer cams, and actuating devices with rotary members and sliding members to actuate a latch bolt from either side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional door handle assemblies use predetermined structures for indoor and outdoor handgrips, then the handgrips can be securely attached to their respective sides, but the handgrips cannot be changed or replaced with other ones
Solution Approach 1:
The patent applies universality by designing identical actuating devices that can function on both indoor and outdoor sides of the door panel. The actuating device includes a receptacle, rotary member, sliding member, and cam mechanism that can be attached to either side of the door panel, allowing the same device structure to serve multiple positions and enabling handgrip interchangeability between indoor and outdoor sides
2Productivity
If door handle assemblies use fixed attachment structures, then the handgrips remain stable during operation, but the manufacturing and replacement processes become time-consuming
Solution Approach 1:
The patent applies segmentation by dividing the door handle assembly into separate modular components: the door panel, the actuating device (with receptacle, rotary member, sliding member, and cam), and the handgrip. This segmentation allows each component to be independently manufactured and assembled, enabling quick assembly and replacement while maintaining stable operation through proper mechanical connection of the segmented parts
3Ease of manufacture
If door handle assemblies use complex predetermined structures for each side, then the latch bolt can be reliably actuated, but the manufacturing and assembly processes become complicated
Solution Approach 1:
The patent applies copying by using identical actuating device structures for both indoor and outdoor sides. The same receptacle, rotary member, sliding member, and cam mechanism are copied and attached to both sides of the door panel, simplifying manufacturing through standardization while maintaining precise actuation functionality on both sides
Data Source
AI summary
A door handle assembly includes a lock casing having an inner cam and an outer cam and a latch bolt, an indoor handle device attached to an inner portion of the lock casing with an actuating device and having a handgrip for being depressed to actuate an actuating bolt and the inner cam to operate the latch bolt, and an outdoor handle device attached to an outer portion of the lock casing with another actuating device and having another handgrip for being pulled to actuate another actuating bolt and the outer cam to operate the latch bolt, the outdoor handle device and indoor handle device are replaceable with each other when the actuating devices are disposed up-side-down.