Accelerator Device Axial Magnet Nesting for Miniaturization
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Solution Overview
Problem
Existing accelerator devices face challenges in miniaturization due to the placement of torsion coil springs and magnets, which leads to increased diameter and potential deformation issues affecting detection accuracy.
Innovation Solution
The accelerator device incorporates a rotary body with a magnet and urging means placed coaxially, where the magnet is on one side face and the urging means on the other, allowing for miniaturization and improved assembly operability, with a separation member to prevent abrasion and maintain positional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the torsion coil spring and magnet are placed at the outside of the handlebar, then the accelerator device can be assembled, but the diameter becomes large and miniaturization is obstructed
Solution Approach 1:
The patent transitions the placement of the magnet and urging means from the radial dimension (outside of handlebar) to the axial dimension (inside the grip along the axial direction). This dimensional change allows the components to be arranged linearly along the grip's axis rather than radially around it, significantly reducing the device's diameter while maintaining assembly feasibility through straightforward axial positioning.
Solution Approach 2:
The patent nests the magnet and urging means inside the grip structure, placing them in the internal space along the axial direction. This nesting approach allows the components to be contained within the existing grip boundaries, achieving miniaturization by utilizing the internal volume of the grip rather than extending the device outward.
2Measurement precision
If the magnet is disposed to the grip side, then the rotation angle can be detected, but the device diameter increases and miniaturization is obstructed
Solution Approach 1:
The patent repositions the magnet from the radial position (at the grip's outer circumference) to the axial position (inside the grip along the axial direction). This dimensional relocation maintains the magnet's functional relationship with the detection element while dramatically reducing the device's radial footprint, enabling miniaturization without compromising rotation angle detection precision.
3Volume of moving object
If the magnet and detection element are placed close together, then the device is miniaturized, but deformation affects detection accuracy
Solution Approach 1:
The patent introduces a separation member that divides the internal space of the grip into distinct regions: one for the magnet and urging means, and another for the detection element. This segmentation physically isolates the magnet from the detection element, preventing deformation-induced interference while maintaining compact axial arrangement, thus preserving detection accuracy in a miniaturized configuration.
Solution Approach 2:
The separation member acts as an intermediary structure between the magnet and detection element. This intermediary component provides mechanical support and spatial separation, ensuring that the magnet's position and the detection element's position remain stable and independent, thereby preventing deformation from affecting detection accuracy while enabling miniaturization.
4Device complexity
If the urging means is disposed to the gear side, then the structure is compact, but the magnet position stability is affected
Solution Approach 1:
The patent relocates the urging means from the radial position (at the gear's outer side) to the axial position (inside the grip along the axial direction), placing it on the opposite side of the rotary body from the magnet. This dimensional repositioning creates clear spatial separation between the magnet and urging means, preventing interference and ensuring magnet position stability while maintaining structural compactness through efficient axial arrangement.
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
This configuration enhances detection accuracy and reliability while maintaining the magnet's position against the detection element, achieving stable signal output and miniaturization of the device.
Implementation Method 1
rotation angle detecting means which detects a rotation angle of the grip based on magnetic field variation due to rotation of the magnet
Data Source
Figure 1
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AI summary
In an accelerator device for performing acceleration operation including a rotary body 4 which rotates with rotation of a grip 1, a magnet 5 which rotates with rotation of the rotary body 4, rotation angle detecting means 6 which detects a rotation angle of the magnet 5, urging means 7 which returns the grip 1 to an original point position by urging the rotary body 4, and a separation member 8 which separates the rotary body 4 and the rotation angle detecting means 6, the rotation angle detection means 6 is fixed to the separation member 8 and the rotary body 4 is rotatably held thereby while the urging means 7 urges the rotary body 4 toward the separation member 8 as well as in the rotation direction, so that positional variation of the rotation angle detecting means 6 against the magnet 5 can be prevented.