Force Feedback Apparatus Trigger Linkage Design
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Solution Overview
Problem
Existing force feedback apparatuses are complex in assembly, limited to one-directional force application, and suffer from reduced rotational speed and user experience due to the need for converting rotating force into linear force using worms and gears.
Innovation Solution
A force feedback apparatus with a simplified design featuring a rotation shaft, a housing with a force feedback module, a sliding block, an ejector pin, and interacting driving elements that directly provide force feedback without additional transmission structures, allowing for bidirectional force application and timely feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a worm and gear transmission mechanism is used to convert rotating force into linear force, then force feedback can be provided, but the assembly becomes complicated and the structure is reduced to one-directional force application
Solution Approach 1:
The patent extracts and eliminates the complex worm and gear transmission mechanism from the force feedback apparatus. By directly coupling the motor output to the trigger through a simplified linkage system, the design removes unnecessary transmission components while maintaining force feedback functionality, thereby reducing assembly complexity.
Solution Approach 2:
Instead of converting rotating motion to linear motion through complex mechanisms, the patent inverts the approach by using a linkage system that directly translates motor movement to trigger movement in a linear path. This inversion simplifies the transmission path and enables bidirectional force application.
2Force
If a reduction gear is used to amplify motor force, then force feedback strength is improved, but the rotational speed of the trigger is reduced and timeliness is affected
Solution Approach 1:
The patent replaces the traditional reduction gear mechanical system with a direct linkage mechanism. This substitution eliminates the speed-reducing effect of gears while maintaining force amplification through the linkage geometry, thereby preserving trigger response speed and timeliness.
Solution Approach 2:
The patent employs a dynamic linkage system that adapts the force transmission based on real-time motion conditions. The linkage design allows the system to maintain optimal force feedback strength while preserving speed characteristics through dynamic geometric relationships between moving components.
3Force
If a worm and gear transmission is used, then force conversion is achieved, but the force can only be applied in one direction and bidirectional force feedback cannot be achieved
Solution Approach 1:
The patent designs a universal linkage mechanism that can transmit force in multiple directions. The linkage system is configured to accommodate both pushing and pulling motions, enabling bidirectional force feedback capability while maintaining a simple overall structure.
Solution Approach 2:
The patent extends the force transmission from a single-direction linear path to a multi-dimensional linkage system. By incorporating angular and rotational degrees of freedom in the linkage design, the system achieves bidirectional force application while maintaining structural simplicity.
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 simplifies assembly, enables bidirectional force feedback, and enhances user experience by providing timely and immersive force feedback without the need for complex conversion mechanisms.
Implementation Method 1
the first driving element interacts with the second driving element to drive the ejector pin to drive the transmission portion to move
Implementation Method 2
a reset spring arranged between the sliding block and the second driving element
Data Source
AI summary
Provided is a force feedback apparatus, including a rotation shaft, a force feedback module fixed to the rotation shaft, and a trigger movably connected to the rotation shaft. The force feedback module includes a housing fixed to the rotation shaft and having a first opening and a force feedback assembly received in the housing. The force feedback assembly includes a sliding block, an ejector pin, a first driving element, a second driving element, and a transmission portion fixed to the sliding block and extending through the first opening to abut against the trigger. The first driving element interacts with the second driving element to drive the ejector pin to drive the transmission portion to move to realize force feedback on the trigger. The force feedback apparatus requires no additional transmission structure and directly provides force feedback for the trigger in a timely manner, thereby reducing the assembly difficulty.