TWI627095B - Bicycle and derailleur switch device thereof - Google Patents

Abstract

A bicycle includes a toothed disc module, a transmission module, a handle, two brake controllers and two shifting switches. The sprocket wheel module includes a front sprocket set and a rear sprocket set. The transmission module includes a front derailleur and a rear derailleur, and the front derailleur and the rear derailleur are respectively coupled to the front sprocket set and the rear sprocket set. The handle has two grips. The two brake controllers are disposed on the handles and respectively correspond to the two grip portions. The two shifting switches are disposed on the handle or at least one brake controller, and the shifting switches are coupled to the front derailleur and the rear derailleur. A shifting switch is adapted to be triggered to increase the gear ratio of the bicycle by the transmission module driving the sprocket module, and the other shifting switch is adapted to be triggered to reduce the gear ratio of the bicycle by the transmission module driving the sprocket module.

Description

Bicycle and its variable speed switch device

The present invention relates to a bicycle, and more particularly to a bicycle having a shifting function.

In recent years, the bicycle market has flourished, and both high-end bicycles of competition type and mass-type bicycles for leisure and entertainment have been favored by consumers. In general, bicycles are often equipped with a transmission so that the bicycle can move the chain to different chain rings depending on the terrain and user needs. The transmission includes a front derailleur and a rear derailleur for controlling the front sprocket position and the rear sprocket position of the chain, respectively. Bicycles can be used with different transmissions depending on the frame structure or shifting line. In addition to the mechanical transmission, many bicycles are gradually adopting electronic transmissions.

The bicycle can be shifted by adjusting the position of the chainring of the chain, wherein the shifting result is related to the gear ratio of the front and rear sprocket wheels on which the chain is located. In the past, the shifting mode requires at least four shifting switches to control the position of the front and rear derailleur switching chains on the front sprocket and the position of the chain on the rear sprocket, wherein the two shifting switches are respectively used to control the front derailleur switching chain. The position of the front sprocket wheel further increases the gear ratio or reduces the gear ratio, and the other two shift switches are respectively used to control the position of the rear derailleur switching chain on the rear sprocket wheel to increase the gear ratio or reduce the gear ratio. In this design, the user needs to operate at least four shifting switches, which makes the shifting operation more complicated.

The invention provides a bicycle, and the operation mode of the shifting is relatively simple.

The bicycle of the present invention comprises a toothed disc module, a transmission module, a handle, two brake controllers and two shifting switches. The sprocket wheel module includes a front sprocket set and a rear sprocket set. The transmission module includes a front derailleur and a rear derailleur, and the front derailleur and the rear derailleur are respectively coupled to the front sprocket set and the rear sprocket set. The handle has two grips. The two brake controllers are disposed on the handles and respectively correspond to the two grip portions. The two shifting switches are disposed on the handle or at least one brake controller, and the shifting switches are coupled to the front derailleur and the rear derailleur. A shifting switch is adapted to be triggered to increase the gear ratio of the bicycle by the transmission module driving the sprocket module, and the other shifting switch is adapted to be triggered to reduce the gear ratio of the bicycle by the transmission module driving the sprocket module.

In an embodiment of the invention, the two shifting switches are respectively disposed on the two brake controllers.

In an embodiment of the invention, the two shifting switches are disposed in a brake controller.

In an embodiment of the invention, the two shifting switches are disposed on the handle and respectively correspond to the two brake controllers.

In an embodiment of the invention, each of the grip portions has an end, and each brake controller is away from the corresponding end.

In an embodiment of the present invention, each of the brake controllers includes a bracket and a brake lever, and the bracket is coupled between the corresponding grip portion and the brake lever, and each grip portion has a first grip position. And a second holding position, the distance between the first holding position and the corresponding shifting switch is smaller than the distance between the first holding position and the corresponding brake lever, and the distance between the second holding position and the corresponding shifting switch is smaller than the second grip Hold the distance from the corresponding brake lever.

In an embodiment of the invention, each of the gripping portions includes a first holding position and a second holding position, and each of the shifting switches has a contact surface, and the contact surface is inclined to the axial direction of the first holding position. And inclined to the axial direction of the second holding position.

In an embodiment of the invention, each of the brake controllers includes a bracket and a brake lever, and the bracket is connected between the corresponding grip portion and the brake lever, and each shift switch is disposed on the corresponding bracket.

In an embodiment of the invention, each of the brake controllers includes a bracket and a brake lever, and the bracket is connected between the corresponding grip portion and the brake lever, and each shift switch is disposed on the corresponding brake lever.

In an embodiment of the invention, the bicycle includes a shift control unit, wherein the shift control unit is coupled to the two shift switches, the front derailleur and the rear derailleur and stores a gear ratio table, and the shift switch is adapted to be triggered to generate a a first signal, the other shift switch is adapted to be triggered to generate a second signal, and the shift control unit is adapted to receive the first signal to control the first path of the front derailleur, the rear derailleur or the front derailleur and the rear derailleur along the gear ratio table Increasing a gear ratio of the bicycle, and the shift control unit is adapted to receive the second signal to control the front derailleur, the rear derailleur or the front derailleur and the rear derailleur to reduce the gear ratio of the bicycle along one of the second paths of the gear ratio table, the first path being different from the The second path.

In an embodiment of the invention, the sprocket wheel module further includes a chain, the front sprocket set has a plurality of front sprocket sets, and the rear sprocket set has a plurality of rear sprocket wheels, the chain being located on a front sprocket wheel and On a rear sprocket wheel, the front derailleur is adapted to drive the chain from the front sprocket to the other front sprocket, and the rear derailleur is adapted to drive the chain from the rear sprocket to the other rear sprocket.

In an embodiment of the invention, the first path has a first switching point, and when the transmission module increases the gear ratio of the bicycle along the first path, the rear derailleur moves the chain from a rear toothed disc along the first path. To the other rear sprocket, and the front derailleur moves the chain from one sprocket to the other sprocket at the first switching point.

In an embodiment of the invention, the second path has a second switching point, and when the transmission module reduces the gear ratio of the bicycle along the second path, the rear derailleur moves the chain from a rear tooth plate along the second path. To the other rear toothed disc, and the front derailleur moves the chain from one front toothed disc to the other front front toothed disc at a second switching point, the first switching point is different from the second switching point.

In an embodiment of the invention, the rear chainring of the chain at the first switching point is different from the rear chainring of the chain at the second switching point.

In an embodiment of the invention, the first path has a first switching point, and when the transmission module increases the gear ratio of the bicycle along the first path, the rear derailleur moves the chain from a rear toothed disc along the first path. To the other rear sprocket, the front derailleur moves the chain from one sprocket to the other at the first switching point, and the rear derailleur moves the chain from one rear sprocket to the other rear sprocket at the first switching point.

In an embodiment of the invention, the second path has a second switching point, and when the transmission module reduces the gear ratio of the bicycle along the second path, the rear derailleur moves the chain from a rear tooth plate along the second path. To the other rear chain gear, the front derailleur moves the chain from one front toothed disc to the other front toothed disc at a second switching point, and the rear derailleur moves the chain from one rear toothed disc to the other rear rear toothed disc at a second switching point, The first switching point is different from the second switching point.

In an embodiment of the invention, the rear chainring of the chain at the first switching point is different from the rear chainring of the chain at the second switching point.

Based on the above, in the bicycle of the present invention, each of the shift switches is not only coupled to one of the front and rear derailleurs, and each of the shift switches is designed to simultaneously couple the front and rear derailleurs. Accordingly, the front and rear derailleurs can be controlled by a shift switch to increase the position of the chain on the front sprocket and the position of the chain on the rear sprocket along the path of increasing the gear ratio, and the front derailleur is controlled by another shift switch. And the rear derailleur switches the position of the chain on the front sprocket and the position of the chain on the rear sprocket along the path of reducing the gear ratio. Therefore, the bicycle of the present invention can control the front and rear derailleurs by only two shift switches, and is relatively simple in operation.

The above described features and advantages of the invention will be apparent from the following description.

1 is a schematic view of a bicycle according to an embodiment of the present invention. Referring to FIG. 1 , the bicycle 100 of the present embodiment includes a toothed disc module 110 , a transmission module 120 , and two shifting switches 130 . The chainring module 110 includes a front sprocket set 112 and a rear sprocket set 114. The transmission module 120 includes a front derailleur 122 and a rear derailleur 124. The front derailleur 122 and the rear derailleur 124 are, for example, electronic transmissions coupled to the front sprocket set 112 and the rear sprocket set 114, respectively. Each of the shift switches 130 is coupled to the front derailleur 122 and the rear derailleur 124.

Figure 2 is a partial perspective view of the bicycle of Figure 1 . Referring to FIG. 2, the bicycle 100 further includes a handle 140 and two brake controllers 150. The handle 140 has two grip portions 142 for holding the left and right hands of the rider. The two brake controllers 150 are disposed on the handles 140 and respectively correspond to the two gripping portions 142. The two shifting switches 130 are disposed on the at least one brake controller 150 (the two shifting switches 130 are respectively disposed on the two brake controllers 150).

The shift switch 130 corresponding to the left-hand brake controller 150 in FIG. 2 is adapted to be triggered by the rider's pressing to increase the gear ratio of the bicycle 100 by the transmission module 120 driving the chain gear module 110 (gear ratio) And the shift switch 130 corresponding to the right hand brake controller 150 in FIG. 2 is adapted to be triggered by the rider's pressing to reduce the gear ratio of the bicycle 100 by the transmission module 120 driving the chain gear module 110. . In other embodiments, the shift switch 130 on the left hand brake controller 150 of FIG. 2 can be modified to be triggered by the rider's press to drive the rack module 110 to reduce the bicycle by the transmission module 120. The gear ratio of 100, and at the same time the shift switch 130 corresponding to the right hand brake controller 150 in FIG. 2 can be modified to be triggered by the rider's pressing to drive the gear plate module 110 by the transmission module 120. The gear ratio of the bicycle 100 is not limited in the present invention, and can be changed, for example, by the rider.

Specifically, the bicycle 100 of the present embodiment includes a chain 116 as shown in FIG. 1, the front chain gear set 112 has a plurality of front chainrings, the rear chain gear set 114 has a plurality of rear chainrings, and the chain 116 is located on the front chainring A front sprocket on the group 112 and a rear sprocket on the rear sprocket set 114. During the above operation, the front derailleur 122 is adapted to drive the chain 116 from the front sprocket to the other front sprocket, and the rear derailleur 124 is adapted to drive the chain 116 from the rear sprocket to the other rear sprocket. In order to achieve the effect of increasing or decreasing the gear ratio of the bicycle 100.

In the above configuration, each of the shifting switches 130 is not only coupled to one of the front derailleur 122 and the rear derailleur 124, and each of the shifting switches 130 is designed to simultaneously couple the front derailleur 122 and the rear derailleur 124. Accordingly, the front derailleur 122 and the rear derailleur 124 can be controlled by a shift switch 130 to switch the position of the chain 116 on the front sprocket set 112 and the position of the chain 116 on the rear sprocket set 114 along the path of increasing the gear ratio, and borrow The front derailleur 122 and the rear derailleur 124 are controlled by the other shift switch 130 to switch the position of the chain 116 to the front sprocket set 112 and the position of the chain 116 to the rear sprocket set 114 along the path of decreasing the gear ratio. Therefore, the bicycle 100 of the present embodiment can control the front derailleur 122 and the rear derailleur 124 to perform shifting only by the two shift switches 130, and is relatively simple in operation.

In more detail, the bicycle 100 of the present embodiment includes a shift control unit 160 as shown in FIG. 1. The shift control unit 160 is coupled to the two shift switches 130, the front derailleur 122, and the rear derailleur 124 to transmit the shift switches 130 through the shift control. The unit 160 is coupled to the front derailleur 122 and the rear derailleur 124. The shift control unit 160 stores a gear ratio table 162, a shift switch 130 is adapted to be triggered to generate a first signal, another shift switch 130 is adapted to be triggered to generate a second signal, and the shift control unit 160 is adapted to receive the first Controlling the front derailleur 122, the rear derailleur 124 or the front derailleur 122 and the rear derailleur 124 to increase the gear ratio of the bicycle 100 along a first path of the gear ratio table 162, and the shift control unit 160 is adapted to receive the second signal. Controlling the front derailleur 122, the rear derailleur 124 or the front derailleur 122 and the rear derailleur 124 reduces the gear ratio of the bicycle 100 along one of the second paths of the gear ratio table 162. The first path is, for example, different from the second path. The first path and the second path are specifically described below by means of a drawing.

Figure 3 is a schematic illustration of the table of gear ratios of Figure 1. Referring to FIG. 3, in the present embodiment, the front sprocket set 112 includes, for example, two front spurs 112a, and the rear sprocket set 114 includes, for example, ten rear spurs 114a. The number of teeth of the front sprocket 112a is 34 teeth and The number of teeth of the rear sprocket 114a is 11 teeth, 12 teeth, 13 teeth, 14 teeth, 15 teeth, 17 teeth, 19 teeth, 21 teeth, 24 teeth and 28 teeth, but the invention is not limited thereto. The aforementioned gear ratio of the bicycle 100 can be regarded as the gear ratio of the front sprocket 112a and the rear spur 114a where the chain 116 (shown in FIG. 1) is located. Therefore, when the chain 116 is positioned at different front sprocket 112a and rear sprocket 114a, the bicycle 100 has a different gear ratio. For example, when the chain 116 is located at the front spur 112a having a tooth number of 34 teeth and the rear sprocket 114a having a tooth number of 11 teeth, the gear ratio of the bicycle 100 is about 3.09. Therefore, the shifting mode is achieved by changing the gear ratio of the bicycle 100 by changing the front sprocket 112a and the rear spur 114a where the chain 116 is located. The specific shifting mode of the bicycle 100 of the present embodiment will be described below with reference to FIG.

First, when the first switch is triggered by triggering a shift switch 130, the shift control unit 160 controls the front derailleur 122 and the rear derailleur 124 to increase the gear ratio of the bicycle 100 along the first path P11 of the gear ratio table 162. When the other shift switch 130 is triggered to generate the second signal, the shift control unit 160 controls the electronic shifters to reduce the gear ratio of the bicycle 100 along the second path P12 of the gear ratio table 132.

In the present embodiment, the first path P11 has a first switching point C11, and the step of controlling the front derailleur 122 and the rear derailleur 124 includes controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a to the other along the first path P11. The rear sprocket 114a controls the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a at a first switching point C11. Further, in the present embodiment, the second path P12 has a second switching point C12, and the step of controlling the front derailleur 122 and the rear derailleur 124 includes controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a along the second path P12. The other rear toothed disc 114a controls the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a at a second switching point C12, wherein the first switching point C11 is different from the second switching point C12. Further, the rear toothed disc 114a of the chain 116 at the first switching point C11 is different from the rear toothed disc 114a where the chain 116 is located at the second switching point C12.

On the other hand, the shifting method shown in FIG. 3 has a bidirectional switching path, that is, the first path P11 is different from the second path P12. When the bicycle 100 switches the front sprocket 112a and the rear sprocket 114a where the chain 116 is located to increase or decrease the gear ratio, the shift control unit 160 can adjust the front sprocket 112a where the chain 116 is located along the first path P11 or the second path P12. Or the rear sprocket 114a. Accordingly, when the shift control unit 160 frequently adjusts the gear ratio back and forth via controlling the front derailleur 122 and the rear derailleur 124, since the rear toothed disc 114a where the first switching point C11 is located is different from the chain 116 after the second switching point C12 The toothed disc 114a can reduce the damage of the shifting member.

4 is a schematic diagram of a tooth ratio table in accordance with another embodiment of the present invention. In the present embodiment, the first path P21 has two first switching points C21. The steps of controlling the front derailleur 122 and the rear derailleur 124 include controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a to the other rear chainring 114a along the first path P21, and controlling the front derailleur 122 at the first switching point C21. The chain 116 moves from the front sprocket 112a to the other front sprocket 112a. Further, in the present embodiment, the second path P22 has two second switching points C22, and the steps of controlling the front derailleur 122 and the rear derailleur 124 include controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a along the second path P22. Moving to the other rear sprocket 114a, and controlling the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a at a second switching point C22, wherein the first switching point C21 is different from the second switching point C22. Further, the rear toothed disc 114a of the chain 116 at the first switching point C21 is different from the rear toothed disc 114a of the chain 116 at the second switching point C22.

In addition to this, since the bicycle 100 of the present embodiment has three front toothed discs 112a, the number of teeth ratio table 132 also has an auxiliary path P23. When the chain 116 is located at one of the first switching points C21 and is located at the front toothed disc 112a having a tooth number of 32 teeth and the rear toothed disc 114a having a tooth number of 15 teeth, and the signal is the second signal, the shift control unit 160 does not The front derailleur 122 is controlled to move the chain 116 back to the front sprocket 112a having a number of teeth of 24 teeth along the first path P21. On the other hand, the shift control unit 160 controls the rear derailleur 124 to move the chain 116 from the rear spur 114a having 15 teeth to the rear spur 114a having a tooth number of 17 teeth along the auxiliary path P23 to reduce the gear ratio from 2.13 to 1.88.

In addition, when the chain 116 is located at one of the second switching points C22 and is located at the front toothed disc 112a having a tooth number of 42 teeth and the rear toothed disc 114a having a tooth number of 28 teeth, and the signal is the second signal, the shift control unit The control front derailleur 122 moves the chain 116 from the front toothed disc 112a having a tooth number of 42 teeth to the front toothed disc 112a having a tooth number of 32 teeth along the second path P22 to reduce the gear ratio from 1.50 to 1.14. Similarly, when the chain 116 is located at one of the second switching points C22 and is located at the front toothed disc 112a having a tooth number of 32 teeth and the rear toothed disc 114a having a tooth number of 32 teeth, and the signal is the second signal, the shift control is performed. The unit 160 controls the front derailleur 122 to move the chain 116 from the front toothed disc 112a having a tooth number of 32 teeth to the front toothed disc 112a having a number of teeth of 24 teeth along the second path P22 to reduce the gear ratio from 1.00 to 0.75. Thereafter, when the shift control unit 160 receives the first signal, the shift control unit 160 controls the rear derailleur 124 to move the chain 116 from the rear toothed disc 114a having a tooth number of 32 teeth to the tooth number of 28 teeth along the first path P21. The rear toothed disc 114a increases the gear ratio from 0.75 to 0.86.

Therefore, in the present embodiment, when the shift control unit 160 controls the front derailleur 122 and the rear derailleur 124 along the first path P21 or the second path P22, the shift control unit 160 controls the rear derailer for most of the time. 124 to control the gear ratio. When the shift control unit 160 reaches the first switching point C21 or the second switching point C22 along the first path P21 or the second path P22, the shift control unit 160 controls the gear ratio by controlling the front derailleur 122. Therefore, only one of the front derailleur 122 or the rear derailleur 124 is controlled by the shift control unit 160 during the shifting process to prevent the bicycle 100 from vibrating during the shifting process and has better rideability.

On the other hand, the shifting method shown in FIG. 4 has a bidirectional switching path, that is, the first path P21 is different from the second path P22. When the bicycle 100 switches the front sprocket 112a and the rear sprocket 114a where the chain 116 is located to increase or decrease the gear ratio, the shift control unit 160 can adjust the front sprocket 112a where the chain is located along the first path P21 or the second path P22 or Rear sprocket 114a. According to this, when the shift control unit 160 frequently adjusts the gear ratio back and forth via the control of the front derailleur 122 and the rear derailleur 124, the damage of the shifting member can be reduced.

Figure 5 is a schematic illustration of a tooth ratio table in accordance with another embodiment of the present invention. Referring to FIG. 5, in the present embodiment, the bicycle 100 has two front toothed discs 112a and ten rear toothed discs 114a. The number of teeth of the front toothed disc 112a is 34 teeth and 50 teeth, respectively, and the number of teeth of the rear toothed disc 114a is 11 teeth, 12 teeth, 13 teeth, 14 teeth, 15 teeth, 17 teeth, 19 teeth, 21 teeth, 24 teeth and 28, respectively. Teeth, but the invention is not limited thereto.

In the present embodiment, the first path P31 has a first switching point C31, and the step of controlling the front derailleur 122 and the rear derailleur 124 includes controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a to the other along the first path P31. The rear sprocket 114a controls the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a at a first switching point C31 and controls the rear derailleur 124 to move the chain 116 from the rear sprocket 114a to the other rear tooth Disk 114a. Further, in the present embodiment, the second path P32 has a second switching point C32, and the step of controlling the front derailleur 122 and the rear derailleur 124 includes controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a along the second path P32. Another rear sprocket 114a, and at the second switching point C32, controls the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a and control the rear derailleur 124 to move the chain 116 from the rear sprocket 114a to another Rear sprocket 114a.

Therefore, in the present embodiment, the shift control unit 160 simultaneously controls the front derailleur 122 and the rear derailleur 124 at the first switching point C31 or the second switching point C32, wherein the first switching point C31 is different from the second switching point C32. . Further, the rear toothed disc 114a of the chain 116 at the first switching point C31 is different from the rear toothed disc 114a where the chain 116 is located at the second switching point C32.

Further, in the present embodiment, the step of controlling the rear derailleur 124 to move the chain 116 from the rear chain gear 114a to the other rear chain gear 114a at the first switching point C31 includes passing the chain 116 from the rear chainring 114a along the first path P31. Moving to another rear toothed disc 114a having a higher number of teeth, and controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a to the other rear chainring 114a at the second switching point C32 includes moving the chain 116 from the rear chainring 114a moves along the second path P32 to the other rear toothed disc 114a having a lower number of teeth, wherein the rear toothed disc 114a of the chain 116 at the first switching point C31 is different from the rear toothed disc 114a where the chain 116 is located at the second switching point C32. .

It can be seen that, in the present embodiment, when the shift control unit 160 controls the front derailleur 122 and the rear derailleur 124 along the first path P31 or the second path P32, the shift control unit 160 controls the rear derailleur 124 for most of the time. To control the gear ratio. When the shift control unit 160 reaches the first switching point C31 or the second switching point C32 along the first path P31 or the second path P32, the shift control unit 160 controls the gear ratio by simultaneously controlling the front derailleur 122 and the rear derailleur 124.

Comparing FIG. 3 with FIG. 5, the embodiment of FIG. 5 simultaneously controls the front derailleur 122 and the rear derailleur 124 at the first switching point C31 or the second switching point C32, while the embodiment of FIG. 3 is at the first switching point C11 or the second. The switching point C12 controls only the front derailleur 122. Therefore, in the embodiment of FIG. 5, the difference between the gear ratio before and after the first switching point C31 and the gear ratio before and after the second switching point C32 is small, and the gear ratio and the second before and after the first switching point C11 of the embodiment of FIG. The difference in the gear ratio before and after the switching point C12 is large. Accordingly, the embodiment of Figure 5 has a relatively uniform change in gear ratio.

On the other hand, the shifting method shown in FIG. 5 has a bidirectional switching path, that is, the first path P31 is different from the second path P32. When the bicycle 100 switches the front sprocket 112a and the rear sprocket 114a where the chain is located to increase or decrease the gear ratio, the shift control unit 160 can adjust the front sprocket 112a where the chain 116 is located along the first path P31 or the second path P32 or Rear sprocket 114a. Accordingly, when the shift control unit 160 frequently adjusts the gear ratio back and forth via the control front derailleur 122 and the rear derailleur 124, since the rear toothed disc 114a where the first switching point C31 is located is different from the chain 116 after the second switching point C32 The toothed disc 114a can reduce the damage of the shifting member.

Figure 6 is a schematic illustration of a tooth ratio table in accordance with another embodiment of the present invention. In the present embodiment, the first path P41 has two first switching points C41. The steps of controlling the front derailleur 122 and the rear derailleur 124 include controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a to the other rear chainring 114a along the first path P41, and controlling the front derailleur 122 at the first switching point C41. The chain 116 moves from the front sprocket 112a to the other front sprocket 112a. Further, in the present embodiment, the second path P42 has two second switching points C42, and the steps of controlling the front derailleur 122 and the rear derailleur 124 include controlling the rear derailleur 124 to move the chain 116 from the rear chainring 114a along the second path P42. Moving to the other rear sprocket 114a, and controlling the front derailleur 122 to move the chain 116 from the front sprocket 112a to the other front sprocket 112a at a second switching point C42, wherein the first switching point C41 is different from the second switching point C42. Further, the rear toothed disc 114a of the chain 116 at the first switching point C41 is different from the rear toothed disc 114a where the chain 116 is located at the second switching point C42.

In addition to this, since the bicycle 100 of the present embodiment has three front toothed discs 112a, the number of teeth ratio table 132 also has an auxiliary path P43. When the chain 116 is located at one of the first switching points C41 and is located at the front toothed disc 112a having a tooth number of 32 teeth and the rear toothed disc 114a having a tooth number of 17 teeth, and the signal is the second signal, the shift control unit 160 does not The front derailleur 122 and the rear derailleur 124 are respectively controlled to move the chain back to the front toothed disc 112a having a tooth number of 24 teeth and the rear toothed disc 114a having a tooth number of 15 teeth, along the first path P41. On the other hand, the shift control unit 160 controls the rear derailleur 124 to move the chain 116 from the rear spur 114a having a tooth number of 17 teeth to the rear spur 114a having a tooth number of 19 teeth along the auxiliary path P43 to reduce the gear ratio from 1.88 to 1.68.

In addition, when the chain 116 is located at one of the second switching points C42 and is located at the front toothed disc 112a having a tooth number of 42 teeth and the rear toothed disc 114a having a tooth number of 28 teeth, and the signal is the second signal, the shift control unit 160 simultaneously controls the front derailleur 122 and the rear derailleur 124 to move the chain 116 along the second path P42 to the front toothed disc 112a having a tooth number of 32 teeth and the rear toothed disc 114a having a tooth number of 24 teeth, so that the gear ratio is reduced from 1.50 to 1.33. . Similarly, when the chain 116 is located at one of the second switching points C42 and is located at the front toothed disc 112a having a tooth number of 32 teeth and the rear toothed disc 114a having a tooth number of 32 teeth, and the signal is the second signal, the shift control The unit 160 simultaneously controls the front derailleur 122 and the rear derailleur 124 to move the chain 116 along the second path P42 to the front sprocket 112a having 24 teeth and the rear spur 114a having 28 teeth to reduce the gear ratio from 1.00 to 1.00. 0.86. Thereafter, when the shift control unit 160 receives the first signal, the shift control unit 160 controls the rear derailleur 124 to move the chain 116 from the rear toothed disc 114a having 28 teeth to 24 teeth along the first path P41. The rear toothed disc 114a increases the gear ratio from 0.86 to 1.00.

It can be seen that, in the present embodiment, when the shift control unit 160 controls the front derailleur 122 and the rear derailleur 124 along the first path P41 or the second path P42, the shift control unit 160 controls the rear derailleur 124 for most of the time. To control the gear ratio. When the shift control unit 160 reaches the first switching point C41 or the second switching point C42 along the first path P41 or the second path P42, the shift control unit 160 controls the gear ratio by simultaneously controlling the front derailleur 122 and the rear derailleur 124.

Comparing FIG. 4 with FIG. 6, the embodiment of FIG. 6 simultaneously controls the front derailleur 122 and the rear derailleur 124 at the first switching point C41 or the second switching point C42, while the embodiment of FIG. 4 is at the first switching point C21 or the second. The switching point C22 controls only the front derailleur 122. Therefore, in the embodiment of FIG. 6, the difference between the gear ratio before and after the first switching point C41 and the gear ratio before and after the second switching point C42 is small, and the gear ratio of the embodiment of FIG. 4 before and after the first switching point C21 is the second. The difference in the gear ratio before and after the switching point C22 is large. Accordingly, the embodiment of Figure 6 has a relatively uniform change in gear ratio.

On the other hand, the shifting method shown in Fig. 6 has a bidirectional switching path, that is, the first path P41 is different from the second path P42. When the bicycle 100 switches the front sprocket 112a and the rear sprocket 114a where the chain 116 is located to increase or decrease the gear ratio, the shift control unit 160 can adjust the front sprocket 112a where the chain 116 is located along the first path P41 or the second path P42. Or the rear sprocket 114a. According to this, when the shift control unit 160 frequently adjusts the gear ratio back and forth by controlling the front derailleur 122 and the rear derailleur 124, the damage of the shifting member can be reduced.

The specific arrangement of the shift switch 130, the handle 140, and the brake controller 150 of FIG. 2 will be described below. Referring to FIG. 2, each of the grip portions 142 of the embodiment has a first holding position 142a and a second holding position 142b, and the rider can hold the first holding position 142a or the second holding position as needed. Position 142b. Each brake controller 150 includes a bracket 152 and a brake lever 154. The bracket 152 is coupled between the corresponding grip portion 142 and the brake lever 154. Each shift switch 130 is disposed, for example, on a corresponding bracket 152. The rider can press the brake lever 154 by the index finger, the middle finger, the ring finger and the little finger to perform the braking, and can press the shift switch 130 on the brake controller 150 to perform the shifting. Further, each grip portion 142 has an end E, and each brake controller 150 and the shift switch 130 thereon are remote from the corresponding end E, and are located at a position convenient for the rider to press. In addition, as shown in FIG. 2, the distance between the first holding position 142a and the corresponding shift switch 130 is, for example, smaller than the distance between the first holding position 142a and the corresponding brake lever 154, and the second holding position 142b and the corresponding shifting speed. The distance of the switch 130 is, for example, smaller than the distance between the second holding position 142b and the corresponding brake lever 154, allowing the rider to easily press the shift switch 130 with the thumb.

Figure 7 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. The handle 240, the grip portion 242, the first holding position 242a, the second holding position 242b, the brake controller 250, the bracket 252, and the brake lever 254 of FIG. 7 are arranged and operated in a similar manner to the handle 140 and the grip of FIG. The arrangement and action modes of the holding portion 142, the first holding position 142a, the second holding position 142b, the brake controller 150, the bracket 152, and the brake lever 154 are not described herein. The difference between the embodiment shown in FIG. 7 and the embodiment shown in FIG. 2 is that the two shifting switches 230 are respectively disposed on the two brake levers 254 instead of being disposed on the bracket 252.

Figure 8A is a partial side elevational view of a bicycle in accordance with another embodiment of the present invention. Figure 8B is a front elevational view of the brake controller and shifting switch of Figure 8A. The arrangement of the grip portion 342, the first grip position 342a, the second grip position 342b, the brake controller 350, the bracket 352, and the brake lever 354 of FIGS. 8A and 8B are similar to those of the grip portion 142 of FIG. The arrangement and function of the first holding position 142a, the second holding position 142b, the brake controller 150, the bracket 152, and the brake lever 154 are not described herein. The difference between the embodiment shown in FIGS. 8A and 8B and the embodiment shown in FIG. 2 is that the shift switch 330 has a contact surface 330a which is inclined to the axial direction A1 of the first holding position 342a and inclined to the second. Holding the axial direction A2 of the position 342b allows the rider to easily apply force to the contact surface 330a. The contact surface may be a pressing surface of a shift switch in the form of a button, or may be a touch surface of a variable speed switch in a touch form, which is not limited by the present invention.

Figure 9 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. The handle 440, the grip portion 442, the first holding position 442a, the second holding position 442b, the brake controller 450, the bracket 452, and the brake lever 454 of FIG. 9 are arranged and operated in a similar manner to the handle 140 and the grip of FIG. The arrangement and action modes of the holding portion 142, the first holding position 142a, the second holding position 142b, the brake controller 150, the bracket 152, and the brake lever 154 are not described herein. The difference between the embodiment shown in FIG. 9 and the embodiment shown in FIG. 2 is that the two shifting switches 430 are disposed on the same brake controller 450.

Figure 10 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. The arrangement and function of the handle 540, the grip portion 542, the brake controller 550, and the shift switch 530 of FIG. 10 are similar to those of the handle 140, the grip portion 142, the brake controller 150, and the shift switch 130 of FIG. This will not be repeated here. The embodiment of Figure 10 differs from the embodiment of Figure 2 in that each grip 542 includes only a single holding position.

Figure 11 is a partial perspective view of a bicycle according to another embodiment of the present invention. The arrangement and function of the handle 640, the grip portion 642, the brake controller 650, and the shift switch 630 of FIG. 11 are similar to those of the handle 540, the grip portion 542, the brake controller 550, and the shift switch 530 of FIG. This will not be repeated here. The difference between the embodiment shown in FIG. 11 and the embodiment shown in FIG. 10 is that each brake controller 650 has a flange 650a, and each shift switch 630 is disposed on a corresponding flange 650a.

Figure 12 is a partial perspective view of a bicycle according to another embodiment of the present invention. The arrangement and function of the handle 740, the grip portion 742, the brake controller 750, and the shift switch 730 of FIG. 12 are similar to those of the handle 540, the grip portion 542, the brake controller 550, and the shift switch 530 of FIG. This will not be repeated here. The difference between the embodiment shown in FIG. 12 and the embodiment shown in FIG. 10 is that the shift switch 730 is not disposed in the brake controller 750, and the two shift switches 730 are disposed on the handle 740 and respectively correspond to the two brake controllers 750.

In summary, in the bicycle of the present invention, each of the shift switches is not only coupled to one of the front derailleur and the rear derailleur, and each of the shift switches is designed to simultaneously couple the front derailleur and the rear derailleur. Accordingly, the front and rear derailleurs can be controlled by a shift switch to increase the position of the chain on the front sprocket and the position of the chain on the rear sprocket along the path of increasing the gear ratio, and the front derailleur is controlled by another shift switch. And the rear derailleur switches the position of the chain on the front sprocket and the position of the chain on the rear sprocket along the path of reducing the gear ratio. Therefore, the bicycle of the present invention can control the front and rear derailleurs by only two shift switches, and is relatively simple in operation.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100: bicycle 110: sprocket module 112: front sprocket set 112a: front sprocket 114: rear sprocket set 114a: rear spur 116: chain 120: transmission module 122: front derailleur 124: rear derailleur 130, 230 330, 430, 530, 630, 730: shifting switches 140, 240, 440, 540, 640, 740: handles 142, 242, 342, 442, 542, 642, 742: grips 142a, 242a, 342a, 442a : first holding position 142b, 242b, 342b, 442b: second holding position 150, 250, 350, 450, 550, 650, 750: brake controller 152, 252, 352, 452: brackets 154, 254, 354, 454: brake lever 160: shift control unit 162: gear ratio table 330a: contact surface 650a: flange A1, A2: axial direction E: end P11, P21, P31, P41: first path P12, P22, P32, P42: second path P23, P43: auxiliary path C11, C21, C31, C41: first switching point C12, C22, C32, C42: second switching point

1 is a schematic view of a bicycle according to an embodiment of the present invention. Figure 2 is a partial perspective view of the bicycle of Figure 1 . Figure 3 is a schematic illustration of the table of gear ratios of Figure 1. 4 is a schematic diagram of a tooth ratio table in accordance with another embodiment of the present invention. Figure 5 is a schematic illustration of a tooth ratio table in accordance with another embodiment of the present invention. Figure 6 is a schematic illustration of a tooth ratio table in accordance with another embodiment of the present invention. Figure 7 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. Figure 8A is a partial side elevational view of a bicycle in accordance with another embodiment of the present invention. Figure 8B is a front elevational view of the brake controller and shifting switch of Figure 8A. Figure 9 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. Figure 10 is a partial perspective view of a bicycle in accordance with another embodiment of the present invention. Figure 11 is a partial perspective view of a bicycle according to another embodiment of the present invention. Figure 12 is a partial perspective view of a bicycle according to another embodiment of the present invention.

Claims (19)

A bicycle includes: a sprocket wheel module including a front sprocket set and a rear sprocket set; a transmission module including a front derailleur and a rear derailleur, wherein the front derailleur and the rear derailleur are coupled to the tooth a disk module; a handle having two grips; two brake controllers disposed on the handle and respectively corresponding to the two grip portions; and two shift switches disposed on the handle or at least one of the brake controllers, wherein Each of the shifting switches is coupled to the front derailleur and the rear derailleur, and the shifting switch is adapted to be triggered to increase the gear ratio of the bicycle by driving the gear unit by the transmission module, and the other of the shifting switches is suitable When triggered, the gear module is driven by the transmission module to reduce the gear ratio of the bicycle. The bicycle of claim 1, wherein the two shifting switches are respectively disposed on the two brake controllers. The bicycle of claim 1, wherein the two shifting switches are disposed in a brake controller. The bicycle of claim 1, wherein the two shifting switches are disposed on the handle and respectively correspond to the two brake controllers. The bicycle of claim 1, wherein each of the grip portions has an end, each of the brake controllers being remote from the corresponding end. The bicycle of claim 1, wherein each of the brake controllers includes a bracket and a handlebar, the bracket being coupled to the corresponding grip portion and the bracket Each of the gripping portions has a first holding position and a second holding position, and the distance between the first holding position and the corresponding shifting switch is smaller than the first holding position and the corresponding one. The distance of the second lever position and the corresponding shift switch is smaller than the distance between the second grip position and the corresponding brake lever. The bicycle of claim 1, wherein each of the gripping portions includes a first holding position and a second holding position, each of the shifting switches having a contact surface, the contact surface being inclined to the first The axial position of the holding position is inclined to the axial direction of the second holding position. The bicycle of claim 1, wherein each of the brake controllers includes a bracket and a brake lever, and the bracket is coupled between the corresponding grip portion and the brake lever, each of the shift switch configurations On the corresponding bracket. The bicycle of claim 1, wherein each of the brake controllers includes a bracket and a brake lever, and the bracket is coupled between the corresponding grip portion and the brake lever, each of the shift switch configurations On the corresponding brake lever. The bicycle of claim 1, comprising a shift control unit, wherein the shift control unit is coupled to the two shift switches, the front derailleur and the rear derailleur and stores a gear ratio table, wherein the shift switch is adapted to Triggering to generate a first signal, and the other of the shifting switches is adapted to be triggered to generate a second signal, the shifting control unit is adapted to receive the first signal to control the front derailleur, the rear derailleur or the front derailleur and The rear derailleur increases the gear ratio of the bicycle along a first path of the gear ratio table, and the shift control unit is adapted to receive the second signal to control the front derailleur, the rear derailleur or the front derailleur and the rear derailleur The tooth The second path of the number ratio table reduces the gear ratio of the bicycle, the first path being different from the second path. The bicycle of claim 10, wherein the sprocket wheel module further comprises a chain, the front sprocket set has a plurality of front sprocket sets, the rear sprocket set has a plurality of rear sprocket sets, the chain is located On the front sprocket wheel and a rear sprocket wheel, the front derailleur is adapted to drive the chain from the front sprocket to the other front sprocket, the rear derailleur adapted to drive the chain from the rear sprocket To the other rear sprocket. The bicycle of claim 11, wherein the first path has a first switching point along which the rear derailleur is when the transmission module increases the gear ratio of the bicycle along the first path. The chain is moved from one of the rear sprocket to the other of the rear sprocket, and the front derailleur moves the chain from one of the front sprocket to the other of the spur at the first switching point. The bicycle of claim 12, wherein the second path has a second switching point along which the rear derailleur is when the transmission module reduces the gear ratio of the bicycle along the second path. Moving the chain from one of the rear chainrings to the other of the rear chainrings, and the front derailleur moves the chain from one of the front chainrings to the other of the front chainrings at the second switching point, the first switching point Different from the second switching point. The bicycle of claim 13, wherein the rear chainring of the chain at the first switching point is different from the rear chainring of the chain at the second switching point. The bicycle of claim 11, wherein the first path has a first switching point along which the rear derailleur is when the transmission module increases the gear ratio of the bicycle along the first path. Moving the chain from one of the rear sprocket to the other of the rear sprocket, the front derailleur moves the chain from one of the front sprocket to the other of the spur at the first switching point, and the rear derailleur is The first switching point moves the chain from one of the rear chainrings to the other of the rear chainrings. The bicycle of claim 15 wherein the second path has a second switching point along which the rear derailleur is moved when the transmission module reduces the gear ratio of the bicycle along the second path. Moving the chain from one of the rear sprocket to the other of the rear sprocket, the front derailleur moves the chain from one of the front sprocket to the other of the spur at the second switching point, and the rear derailleur is The second switching point moves the chain from one of the rear chainrings to the other of the rear chainrings, the first switching point being different from the second switching point. The bicycle of claim 16, wherein the rear sprocket of the chain at the first switching point is different from the rear sprocket of the chain at the second switching point. The bicycle of claim 1, wherein the two shifting switches respectively correspond to the two gripping portions, and the bicycle does not include other shifting switches. The bicycle of claim 1, wherein the two shifting switches correspond to one of the grips and have the same orientation.