Bicycle derailleur control device and method for controlling a front derailleur

A front derailleur and control device technology, which is applied to bicycle control systems, bicycle gear shifting mechanisms, bicycle accessories, etc., can solve problems such as strenuous effort, and achieve the effect of preventing contact

Active Publication Date: 2005-10-12
SHIMANO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the chain touches the front derailleur, there will be problems such as friction sound from the chain and hard pedaling.

Method used

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  • Bicycle derailleur control device and method for controlling a front derailleur
  • Bicycle derailleur control device and method for controlling a front derailleur
  • Bicycle derailleur control device and method for controlling a front derailleur

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0041] exist figure 1 Among them, the bicycle 101 to which one embodiment of the present invention is applied is a road racing bike, and includes a diamond-shaped frame 102 having a front fork 98, a handlebar portion 104 fixed to the front fork 98, and a chain 95 and pedals are provided. The drive part 105 composed of the crank 96 of the PD, the front and rear derailleurs 97f and 97r, the front and rear sprocket sets 99f and 99r, etc. is installed on the front fork 98 and the front and rear wheels 106f and 106r of the rear of the frame The brake devices 107f, 107r, and the shift control device 110 that controls the front and rear derailleurs 97f, 97r.

[0042] The handlebar portion 104 is constituted by a handlebar post 111 and a handlebar stem 112 fitted and fixed to the upper end of the handlebar post 111 . The handle post 111 is fitted and fixed to the upper part of the front fork 98 . The handlebar lever 112 is a low-bend handlebar type, and a pair of left and right brak...

no. 2 Embodiment approach 〕

[0063] exist Figure 8-1 In the second embodiment shown in 0, the fine adjustment processing can be turned on and off by the switching operation switch 140 (an example of the switching operation unit) for switching the fine adjustment between valid and invalid.

[0064] like Figure 9 As shown in the figure, in addition to the front and rear upshift switches 131f and 131r, the front and rear downshift switches 132f and 132r, and the front and rear shift position sensors 133f and 133r, a switching operation switch 140 is also connected to the control unit 130 . In addition, as the functional configuration of the control unit 130, a first control disabling unit 130d is added. like Figure 8 As shown in the figure, the changeover operation switch 140 is constituted by, for example, a push button switch provided on the brake bracket 115r and having two positions of on and off. The changeover operation switch 140 is connected to the first control disabling unit 130d, and when th...

no. 3 Embodiment approach 〕

[0068] In the second embodiment described above, a dedicated switching operation switch 140 for enabling / disabling the fine adjustment is provided, but the fine adjustment may be disabled when the power supply voltage is insufficient. In the third embodiment, in Figure 11 Among them, the power supply voltage monitoring unit 142 is also connected to the control unit 130 . In addition, a second control disabling unit 130 e connected to the power supply voltage monitoring unit 142 is added as a functional configuration of the control unit 130 .

[0069] In the third embodiment, as Figure 12As shown in the figure, in step S50 between the initial setting in step S1 and the determination process of the front upshift switch 131f in step S2, the shortage of the power supply voltage is determined based on the signal from the power supply detection unit 142. For example, when the power supply voltage becomes 50% of the power supply voltage, it is determined that the power supply vol...

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PUM

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Abstract

The invention provides a bicycle speed-change control device to control a derailleur which can be electrically controlled and to prevent contact of a chain with a front derailleur.This speed-change control device 110 to control the front derailleur 97f to move the chain 95 to either one of a plurality of front sprockets arranged in the axial direction is furnished with a speed-change control part 130a and a small control part (b). The speed-change control part moves the front derailleur to either one of front speed-change positions corresponding to a plurality of the front sprockets. The small control part moves the front derailleur by a distance smaller than a moving distance between the speed-change positions in accordance with a rear speed-change position of the rear derailleur in correspondence with a plurality of the rear sprockets arranged in the rear hub axial direction.

Description

technical field [0001] The present invention relates to a shift control device, and more particularly, to a bicycle shift control device for controlling a front derailleur that moves a chain to any one of a plurality of sprockets arranged in parallel in the axial direction. Background technique [0002] As a shift device for bicycles, an external shift device having a front derailleur and a rear derailleur is known. In this type of external transmission, the chain is moved by the front derailleur and the rear derailleur to a plurality of front sprockets mounted in parallel on the crankshaft in the axial direction and on the rear hub shaft in the axial direction. One of the plurality of rear sprockets provided is 1 for shifting. Among such external speed change devices, there is known a derailleur and a control device thereof that can be electrically controlled and can move a chain by an actuator such as an electric motor (see Patent Document 1). [0003] In the conventiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62J99/00B62K23/06B62M9/122B62M9/123B62M9/132B62M9/133B62M11/16B62M25/04B62M25/08
CPCB62M25/08B62M25/045B62M2025/003B62K23/06
Inventor 市田典藤井和浩高本隆一朗武林晴行
Owner SHIMANO INC
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