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Rotation sense detection device and rear derailleur

A technology of rotation direction and detection device, which is applied in the direction of measuring device, instrument, transportation and packaging, etc., can solve the problems of complex structure of detection device, complicated processing process, and difficulty in compact size.

Inactive Publication Date: 2006-10-25
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the conventional rotation direction detection device described above, since a pair of reed switches are used to detect the direction of rotation, the structure of the detection device is very complicated, and the processing process to be completed in order to detect the rotation direction is also very complicated
Furthermore, since the two reed switches must be arranged at a rotationally spaced interval, it is difficult to make the device compact in size

Method used

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  • Rotation sense detection device and rear derailleur
  • Rotation sense detection device and rear derailleur
  • Rotation sense detection device and rear derailleur

Examples

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no. 2 example

[0070] Next, referring to Figs. 10 and 11, a rotational direction detecting device 60' mounted on the upper portion of the rear derailleur 42' according to another embodiment will be described. The rear derailleur 42' is the same as the rear derailleur 42 in the first embodiment, except that the position of the rotational direction detection device 60' is different from the position of the rotational direction detection device 60 on the rear derailleur 42. In addition, the rotation direction detection device 60' is the same as the rotation direction detection device 60 in the first embodiment, except that the rotation direction detection device 60' is installed on the upper part of the rear derailleur 42' instead of being installed on the rear derailleur 42' as in the first embodiment. The lower part of the rear derailleur 42. In this way, the rear derailleur 42 with the rotational direction detecting device 60 can be replaced with the rear derailleur 42' having the rotational...

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Abstract

The invention provides a rotation direction detection device, which can be used to detect the rotation direction of a rotatable wheel installed on a chain guide, which has a rotation sensor, a detection element and a blocking mechanism. The rotation sensor is fixed on the chain guide. The detection element is mounted on the wheel so that it can be detected by the rotation sensor. The shielding mechanism has a shielding arm mounted to move between a shielding position where the rotation sensor cannot detect the detection element and a detection position where the rotation sensor can detect the detection element. The shielding mechanism has a coupling member which enables the shielding arm to be coupled to the rotation of the above-mentioned wheel in the first or second rotational direction. The blocking mechanism also has a positioning protrusion, which enables the blocking arm to be positioned at the blocking position or the detection position.

Description

technical field [0001] The present invention generally relates to a rotational direction detection device, and more particularly, the present invention relates to a rotational direction detection device for detecting the rotational direction of a rotatable rotary member mounted on a fixed member. The invention is particularly suitable for use on rear derailleurs. Background technique [0002] In order to perform a shift operation on a bicycle with a small force, an electric shift mechanism that performs a shift operation of a bicycle using an actuator has recently been developed. When using an externally mounted shifting mechanism, since shifting is accomplished by disengaging the chain from one of many sprockets, if the chain is not in forward rotation, that is, if the pedals are not in the forward direction When pedaling in the direction of motion, it is not possible to change gears. Therefore, in order to enable the shifting operation of the externally mounted shifting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P13/04B62M25/00
Inventor 北村智
Owner SHIMANO INC