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Rotational resistance apparatus and operation apparatus

Active Publication Date: 2021-04-01
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a device that can resist rotational motion. It is designed to improve the efficiency of rotation and make it smaller.

Problems solved by technology

Additionally, since components for use the rotor as part of a magnetic circuit, the coil, and the magnetic viscous fluid are accumulated in the radial direction, the rotational resistance apparatus of JP 2017-89732 is not suitable for reducing a diameter.
Further, since the magnetic viscous fluid is arranged on an inner diameter side of the apparatus, the rotational resistance apparatus of JP 2017-110756 cannot generate the resistance torque efficiently.

Method used

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  • Rotational resistance apparatus and operation apparatus
  • Rotational resistance apparatus and operation apparatus
  • Rotational resistance apparatus and operation apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018]FIGS. 1, 2, and 4 illustrate a configuration of a rotational resistance apparatus 100 according to Example 1 of the present invention. The rotational resistance apparatus 100 includes a shaft member 101 that is rotatable, a cylindrical member 102 that is arranged to surround an outer periphery of the shaft member 101, and first and second circular plates 103, 104 that are provided to close openings at both ends of the cylindrical member 102. The cylindrical member 102 and the first and second circular plate 103, 104 form a case member.

[0019]The cylindrical member 102 is formed as a magnetic material, and has cutout parts 102a, 102b and through hole parts 102c, 102d. The first and second circular plate 103, 104 are formed as a magnetic material and have through hole parts 103a, 104a, respectively.

[0020]The shaft member 101 is formed as a magnetic material, and has first shafts 101a, 101b that are provided at both ends of the shaft member 101 in a shaft direction and a second sh...

example 2

[0040]FIG. 5 illustrates a configuration of a rotational resistance apparatus 200 according to Example 2 of the present invention. In this example, components common to or similar to those in Example 1 are given reference numerals with the first digit 1 of the reference numeral in Example 1 changed to 2, and the digits thereafter are the same. Further, coil units C, D respectively correspond to the coil units A, B in Example 1. Below, differences from the rotational resistance apparatus 100 according to Example 1 are explained.

[0041]The rotational resistance apparatus 200 according to this example includes a coil spring 215 that is arranged between a step 201f on an outer periphery of a first shaft 201a of a shaft member 201 and an internal surface of an end surface part 207a of a bobbin 207 and that biases the shaft member 201 on one side (a side of a first shaft 201b) in a shaft direction as a biasing member. A second circular plate 204 does not have a through hole part correspond...

example 3

[0050]FIG. 7 illustrates a configuration of a rotational resistance apparatus 300 according to Example 3 of the present invention. In this example, components common to or similar to those in Example 1 are given reference numerals with the first digit 1 of the reference numeral in Example 1 changed to 3, and the digits thereafter are the same. Further, coil units G, H respectively corresponds to the coil units A, B in Example 1. Below, differences from the rotational resistance apparatus 100 according to Example 1 are explained.

[0051]The slide bearings 107c, 108c are integrally provided to the bobbins 107, 108 in Example 1 but, in this example, slide bearings 315, 316, which are made of a non-magnetic material and are formed as a separate part from bobbins 307, 308, are fixed to inner circumferential surfaces of end surface parts 307a, 308a of the bobbins 307, 308. As the slide bearings 315, 316, a resin bearing made of a low friction material, and a metal bearing impregnated with l...

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PUM

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Abstract

A rotational resistance apparatus includes a shaft member that includes a first shaft and a second shaft having a diameter larger than a diameter of the first shaft and that has magnetism, a bobbin that is arranged on an outer periphery of the first shaft and that does not have magnetism, a coil that is wound around the bobbin, a case member having magnetism that covers the bobbin, the coil, and the second shaft, a slide bearing that rotatably receives the first shaft through a first gap and that does not have magnetism, and a magnetic viscous fluid that is arranged between the second shaft and the case member. The first gap is smaller than a second gap between the case member and the first shaft.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to a rotational resistance apparatus and an operation apparatus.Description of the Related Art[0002]A rotational resistance apparatus that generates resistance to a rotation operation using a magnetic viscous fluid can present, for example, resistance to rotation of an operation member capable of a rotation operation to an operator as an operational feeling (touch sensation). Japanese Patent Laid-Japanese Open No. (“JP”) 2017-89732 and Japanese Patent Laid-Open No. (“JP”) 2017-110756 disclose a rotational resistance apparatus adjusting a magnetic field that is applied to a rotatable rotor and a magnetic viscous fluid arranged around a shaft member to adjust resistance (resistance torque) for shearing the magnetic viscous fluid.[0003]However, the rotational resistance apparatus disclosed in JP 2017-89732 and JP 2017-110756 maintains a gap where the magnetic viscous fluid is arranged by supporting the...

Claims

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Application Information

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IPC IPC(8): G05G5/03F16D57/00G05G1/10
CPCG05G5/03F16D57/002G02B7/16G05G2505/00G05G1/10G05G1/08G02B7/04
Inventor HIRANO, JUNYA
Owner CANON KK
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