Input Device Rotor Friction Plate Thrust Direction Compression
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Solution Overview
Problem
Existing operation feeling imparting type input devices require a significant length in the thrust direction for elastic members, leading to increased size and potential damage from excessive operational forces, which compromises durability and convenience.
Innovation Solution
The design incorporates a rotation shaft with a rotor member and friction plate, utilizing a rotation transmission mechanism with engagement protrusions and elastic portions to absorb frictional forces, allowing relative rotation while maintaining size constraints and preventing excessive deformation or breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an elastic member is provided between the operating knob and the electromagnetic brake to allow detection of rotation direction after locking, then flexible control is realized, but the device size in the thrust direction increases
Solution Approach 1:
The elastic member is positioned within the clearance between the friction plate and the rotation shaft, utilizing the existing space rather than adding external components. This nesting approach allows the elastic member to function within the device's internal volume, reducing the overall thrust direction length while maintaining flexible control capability
Solution Approach 2:
The invention transitions from a linear elastic member arrangement to a radial clearance utilization approach. By using the radial clearance between the friction plate and rotation shaft, the elastic member can provide the necessary flexibility without extending the device in the thrust direction, effectively changing the spatial dimension used for elastic deformation
2Length of moving object
If the elastic member is made shorter to reduce device size, then the thrust direction length is reduced, but the elastic member may be damaged by excessive operational forces
Solution Approach 1:
The elastic member acts as a pre-positioned cushioning element within the clearance space, designed to absorb excessive operational forces before they can damage other components. By utilizing the available radial clearance, the elastic member can be optimized for strength-to-length ratio, providing adequate force absorption capability in a compact form
Solution Approach 2:
The invention changes the geometric parameters of the elastic member by positioning it radially within the clearance rather than axially. This parameter change allows the elastic member to have a shorter thrust direction length while maintaining sufficient cross-sectional area and material properties to withstand excessive operational forces without damage
3Ease of operation
If a clearance is provided between the friction plate and rotation shaft to allow free displacement, then the friction plate can be freely displaced in the thrust direction, but the structural rigidity is reduced
Solution Approach 1:
The clearance is provided locally between the friction plate and rotation shaft, allowing free displacement only where needed for operational flexibility. The rest of the structure maintains full rigidity through direct connections and fixed mounting, achieving a balance between operational ease and structural strength by applying the clearance feature selectively rather than throughout the entire structure
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 reduces the device's size in the thrust direction without sacrificing functionality, enhances durability, and prevents part damage from excessive operation, while maintaining excellent operational convenience and durability.
Implementation Method 1
rotation regulation means configured to absorb the friction plate in the thrust direction of the rotor member and to regulate the rotation of the friction plate by a frictional force due to the absorption
Implementation Method 2
rotation elasticity imparting means configured to impart an elastic force in a rotation direction to the rotation transmission mechanism
Data Source
Figure 1
Figure 2A~2C
Figure 3~4
AI summary
Disclosed is an operation feeling imparting type input device capable of realizing a reduction in size in a thrust direction. A rotor member (20) is provided at a rotation shaft (14) of an operation feeling imparting type input device (10) to be spread in a radial direction of the rotation shaft (14). A friction plate (22) is provided close to the rotor member (20), and the friction plate (22) is freely displaced in a thrust direction of the rotor member (20) without being fixed to the rotation shaft (14). While the rotation of the rotor member (20) is transmitted to the friction plate (22) by a transmission mechanism, in a state where the friction plate (22) is absorbed by an electromagnetic brake (24), a clip-shaped member (30) which constitutes the transmission mechanism is elastically deformed in the rotation direction so as to permit the rotation of the rotor member (20). The clip-shaped member (30) in which elastic deformation is generated is not provided on a central axis line (CL), so an increase in size in the thrust direction is suppressed by as much.