Adjustable Door Handle With Extendable Bar Mechanism
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Solution Overview
Problem
Existing door handle solutions for senior citizens with physical limitations require identification and replacement of difficult-to-operate door handles, which can be costly and inconvenient, and may pose difficulties for users unfamiliar with their operation.
Innovation Solution
A rotating door handle assembly with an adjustable handle that includes a first rotatable member engaging a door latch mechanism and a second member with an extendable bar, allowing the handle length to be adjusted using an extension mechanism involving a spring pin and button, enabling easier door operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If alternative door handles or accessories are installed to reduce physical strength needed, then ease of operation is improved, but device complexity and cost increase due to replacement requirements
Solution Approach 1:
The door handle incorporates an extendable bar mechanism that allows the handle length to be dynamically adjusted between retracted and extended positions. This dynamic adjustment enables the same handle to serve different user needs without replacement, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The door handle assembly is designed to perform multiple functions: it can operate in a standard retracted position for normal use and extend to a longer position for users requiring additional leverage. This multi-functionality eliminates the need for multiple different handle types, reducing complexity while maintaining ease of operation.
2Ease of operation
If door handle replacement is implemented, then ease of operation is improved, but loss of time and installation effort increase
Solution Approach 1:
The extendable bar mechanism allows the handle to be adjusted in place without removal or replacement. Users can switch between retracted and extended positions as needed, eliminating the time-consuming process of identifying, removing, and installing alternative handles while maintaining improved ease of operation.
3Ease of operation
If alternative door handles are used, then ease of operation is improved, but adaptability decreases due to user familiarity issues
Solution Approach 1:
The handle assembly maintains the familiar appearance and basic operation of a standard door handle in its retracted position, ensuring user familiarity. When extension is needed, the same handle provides enhanced leverage through the extended bar, combining adaptability with ease of operation without requiring users to learn entirely new mechanisms.
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 adjustable door handle assembly provides a cost-effective and versatile solution that accommodates various users by reducing the force required to open doors, enhancing usability, and allowing a single handle design to be used across different doors.
Implementation Method 1
Activation of the button causes the lever mechanism to adjacently position the first magnet and the second magnet such that the first and second magnets are attracted towards each other to disengage the spring pin from the plurality of notches
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5C
AI summary
A handle operably coupled to rotating door handle assembly is disclosed. The handle may include a first rotatable member configured to engage a door latch mechanism. The handle may further include a second member mechanically engaged with the first member and the second member may be extended a length between a non-extended position and an extended position. A handle cavity may be defined within at least a portion of the second member and a bar may be enclosed within the handle cavity. Furthermore, an extension mechanism may be incorporated with the bar and the second member and configured to extend the bar from the cavity when the second member is in the extended position and retract the bar within the cavity when the second member is in the non-extended position.