JPS6221676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-speed changeover device for a bicycle, and particularly to an operating tool attached to the vicinity of the grip portion of a handlebar.

Since the operating direction of the operating lever of the operating tool of the conventionally used multi-speed changeover device was the horizontal direction,
It was not easy to operate it laterally using only the thumb. Therefore, in order to change gears, the actual situation is to take your hands off the steering wheel and grasp the lever again.

Therefore, the present applicant has previously proposed a two-speed bicycle transmission (Japanese Patent Application No. 52-40454), in which the direction of movement of the thumb, that is, the operating direction of the operating lever, can be changed vertically while holding the handlebar with the hand. By making it possible to operate each stage by pushing only by pushing the handle, it is possible to easily and reliably operate the handle without taking your hands off the handle. The present invention is a multi-speed changeover device capable of shifting two or more speeds, and aims to make the speed change operation of the multi-step changeover device easy and reliable, and also to enable jump shifting. be.

An example embodiment of the present invention will be described below based on the drawings. In the figure, 1 is a bicycle handle, 2 is a grip portion thereof, 3 is an outer wire of a switching operation wire connected to a transmission, 4 is an inner wire thereof, and 5 is a stopper fixed to the end of the cable.

The board 6, which is a fixing member, has mounting bolts 1 inserted into holes 8 provided at the lower end of the curved portion 7 and holes 10 provided at the lower end of the curved fitting 9 whose upper end is locked to the curved portion 7.
1 is inserted and tightened with a nut 12 to fix it near the grip portion of the handle 1.

In the middle of this board 6, a shaft mounting part 14 with a shaft hole 13 is bent and erected, and at the rear of the board 6, a holder 16 for holding two compression springs 15a and 15b is provided.
Holes 17a and 17b for inserting the pins 17a and 16b are arranged side by side, and a support piece 20 with a hole 19 for pivotally supporting the claw shaft pin 18 is provided on both left and right sides of the front, and the tip part is bent diagonally upward. 21 is provided with screw holes 23 for supporting the adjusting screw 22 and nut 22' of the operating wire, and support pieces 26 are provided on both left and right sides with screw holes 25 for attaching the cover 24.

The claw 27 is provided with a shaft hole 28 at the lower end and a notch 30 into which the torsion spring 29 is inserted. 19 is rotatably supported, and one end of the claw shaft pin 18 is caulked to prevent it from coming off.

Note that this torsion spring 29 is biased so that the pawl 27 rotates in the direction of arrow B in FIG.

Next, the reel 32, which receives the inner wire 4 in the guide groove 31, is made of two plates, has a shaft hole 33 in the center, has a hole 34 for the wire stopper 5 at the end of the guide groove 31, and has a second plate. A pin 37 is installed for rotating the second stage lever 35 and the third stage lever 36 in relation to each other, and this reel 32 is attached to a stepped collar 38.
It is rotatably supported in the shaft hole 13 by. The reel 32 has the wire stopper 5 locked in the hole 34, and is biased in the direction of arrow A in FIG. 3 by the spring force of a transmission (not shown).

Next, the first stage lever 39 has a shaft hole 40 in the center, and two stopper parts 41 and 42 are provided below the push part 39a that is pressed with a finger to prevent rotation at a predetermined angle, and the claw 27 is attached to the front. forming an engaging protrusion 43;
It is rotatably assembled via the collar 44 with a bolt 60 which will be described later. Note that this first stage lever 39
is urged to rotate in the direction of arrow A by compression spring 15a.

On the other hand, the second stage lever 35, like the first stage lever 39, has a push part 35a, a shaft hole 45, stopper parts 46, 47, and a projection piece 48, and further has an arcuate hole 49 around the shaft hole. A play part for the pin 37 is provided at the front part of the arcuate hole 49 so that the reel 32 rotates by about half of the maximum shift rotation amount when the second stage lever 35 rotates by a predetermined amount. Provides an escape portion for the movement of the pin 37 by the third stage lever 36.

On the other hand, the third stage lever 36 is similar to the above lever,
Push portion 36a, shaft hole 50, and stopper portions 51, 5
2 and a projecting piece 53, and an arcuate hole 54 is provided around the shaft hole, and the front part of this arcuate hole 54 is connected to the pin 3.
7 is not provided, and an escape portion is provided at the rear portion for the movement of the pin 37 by the second stage lever 35. Therefore, when the third stage lever 36 is rotated in the direction opposite to the arrow A, the reel 32 rotates together with the third stage lever 36.

Note that the second stage lever 35 and the third stage lever 36 are each rotatably assembled via a collar 55.
The second stage lever 35 is operated by a compression spring 15b, and the third stage lever 36 is operated by a torsion spring 56.
Force it to rotate in the direction. 57 is a torsion spring holder.

Further, the tips of the protrusions 43, 48, and 53 of each stage lever are aligned so that each protrusion can be released and locked to the pawl 27 at the same time.

and a torsion spring holder 57 and a torsion spring 5
6, flat washer 58, collar 55, third stage lever 3
6, second stage lever 35, reel 32, stepped collar 38, first stage lever 39, collar 44, flat washer 5
9 is assembled into the shaft hole 13 of the shaft mounting portion 14 of the board 6 with bolts 60 and nuts 61. Further, the cover 24 is attached to the support piece 26 of the board 6 by screws 62.
Attach it to the screw hole 25 of.

Next, the operation of the apparatus of the present invention constructed as described above will be explained.

The first stage lever 39, the second stage lever 35, and the third stage lever 36 are urged to rotate in the direction of arrow A around the shaft 60, and the pawl 27 rotates in the direction of arrow B around the shaft 18. energized to move.

First, in FIG. 4, the protruding piece 48 of the second stage lever 35 is engaged with the pawl 27, so the pushing part 35a is held in the lower position, and the first stage lever 39 is held at the stopper 42.
By hitting the substrate 6, the pushing part 39
a is held in the upper position. In this case, although not shown, the push portion 36a of the third stage lever 36 is also in the upper position. Therefore, in this case, the transmission (not shown) is brought into the second gear shift state via the reel 32 and the inner wire 4 that are interlocked with the second gear lever 35.

Next, as shown in FIG. 5, when the first stage lever 39 is pushed down, the pawl 27 is rotated by the protruding piece 43 in the direction opposite to arrow B, and the second stage lever 35 is engaged with the pawl 27. When the first lever 39 is pushed down as shown in FIG. 6, the protruding piece 43 pushes the pawl 27 in the opposite direction to arrow B, causing the protruding piece 48 to release from the pawl 27. Therefore, the second stage lever 35 is moved in the direction of arrow A by the spring 15b.
direction, and is rotated to a position where it is stopped by the stopper 47. At this time, the third stage lever 36 is also operated in the same manner, although not shown. On the other hand, the first stage lever 39
Since the claw 27 is engaged with the protruding piece 43, the pushing part 39a
is held in the depressed position. Therefore, the transmission (not shown) is brought into the first gear shift state via the reel 32 and inner wire 4 that are interlocked with this.

Further, although not shown, when the third stage lever 36 is pushed down, the first and second stage levers 39 and 35 are raised, and the third stage lever 36 is set to the lower position to enter the third stage gear shift state.

That is, in the present invention, since the heights of the projections 43, 48, and 53 relative to the pawl 27 are made constant, when any one lever is pushed down, the other levers are released from engagement with the pawl.

As described above, according to the device of the present invention, by pressing any one of the plurality of levers, the other levers automatically flip up, making it possible to easily and reliably perform a multi-speed shifting operation.

The effects of the device of the present invention are listed below.

(1) Since the lever can only be operated in the pushing direction for each step, it can be operated easily and safely by just moving the thumb while holding the handle.

(2) As many levers as there are gears can be installed in succession, the desired gear can be directly selected. In other words, jump shifting is possible.

(3) The gear shifting operation is crisp and reliable.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the installed state of the device of the present invention, FIG. 2 is a plan view with the cover removed,
FIG. 3 is an exploded perspective view thereof, and FIGS. 4 to 6 are explanatory views of the operation of the apparatus of the present invention. 4... Inner wire, 6... Board, 14...
Shaft mounting part, 15a, 15b...Return spring, 27...
...Claw, 29...Torsion spring, 32...Reel, 3
5...Second stage lever, 36...Third stage lever, 3
9...First stage lever, 43, 48, 53...Protrusion piece, 56...Return spring.

Claims (1)

[Claims] 1. A reel 32 in which the switching operation wire 4 of the transmission is connected to the shaft mounting portion 14 of the base plate 6, which is a fixed member.
A plurality of levers 39, 35, 36 for operating each gear stage are rotatably connected and supported in conjunction with this reel 32, and each operating lever 39, 35, 36 has the same protruding length. Projecting pieces 43, 48,
53 and return springs 15a, 15b, 5
6 is provided, and the pawl 27 with a spring 29 interposed therebetween is biased in the direction of engagement with the protrusions 43, 48, 53 and rotatably supported on the base plate 6, and each of the operating levers 39,
When one of the operating levers 35 and 36 is pressed down and operated, only the protruding piece of that operating lever engages with the tip of the claw 27, and the protruding pieces of the other operating levers disengage from the claw 27. A multi-speed changeover device for a bicycle, which is characterized by: