JPS58118483A - Multistage transmission changeover device for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 conventional multi-speed changeover device was in the lateral direction, it was not easy to operate the operating lever in the lateral direction with only the thumb. In reality, in order to perform this nine-shift operation, you must take your hands off the steering wheel and re-grip the lever.

The applicant previously developed a two-speed bicycle transmission ('l#
MFIB! Ko + o da! By proposing a new system, the thumb can move freely while holding the handle, and the operating lever can be operated in the vertical direction, allowing each step to be operated only by pushing. This allows for easy and reliable operation without taking your hands off the handle. The present invention is a multi-stage transmission switching device capable of shifting at least two stages in total, and aims to facilitate and ensure the gear shifting operation of the multi-stage transmission switching system and to enable jump shifting. be.

An example embodiment of the present invention will be explained below based on drawings of pipes. In the figure, / is the handle of the bicycle, C is the handle, 3 is the outer wire of the switching operation wire connected to the transmission, Da is the inner wire, and j is the stopper fixed to the end of the cable.

The board 6, which is a fixing member, is attached to a hole l provided at the lower end of the curved part 7 and a hole io provided at the lower end of the curved metal fitting whose upper end is locked to the curved part 7. By inserting it through and tightening it with a nut /J, it is fixed near the grip part of the handle /.

In the middle of this board 1, a shaft hole/If is bent and stands as a round shaft mounting part, and at the rear of the board 6, 12 compression springs/jL, /jb holders/61. Holes /7a and /7b tFt are provided for inserting #b, and support pieces λO are provided on both left and right sides of the front with holes for pivotally supporting the claw shaft bin /r.
The tip part is set upright and bent diagonally upward, 2/ has an adjustment screw here for the operation wire, a screw hole 3T to support the nut λ' tube, and a screw hole for attaching the cover Koda T to the left and right images. Ko! The support piece 26t provided with the support piece 26t is erected.

In addition, the claw core has a shaft hole If at its lower end, and a notch JOf into which a torsion spring Kota is inserted.The torsion spring Pt'' is inserted into this notch 30, and the claw shaft pin/I is attached to the board 6.
It is rotatably supported in a hole provided in the hole, and one end of the claw shaft pin I is caulked to prevent it from being removed.

In addition, the claw core of this torsion spring Kota is in the direction of arrow B in diagram lR3.
Force it to rotate in the direction of.

Next, the reel saw, which receives the inner wire <z1 in the guide groove 3, is composed of two plates, and has a shaft hole 3 in the center. f provided and a wire stopper at the end of the guide groove 3/! In addition to providing the hole J4Il, the hole J4Il! 2nd stage lever J and 3rd stage lever 7
A pin J7v is provided for rotation in conjunction with 4T, and this reel saw is rotatably supported in the shaft hole /J by a stepped collar 3r. The three reels are held in the hole J by a wire stopper JV, and are biased in the direction of the arrow M in Fig. 83 by the spring force of a transmission (not shown).

Next, the W/4/stage lever 3 has a shaft hole UO5 in the center, and below the push part JA that you press with your finger, there are two stoppers part 4 that stop the movement at the foot angle. Octopus association established, claws in front.
Form a protrusion 3 that engages with the collar 7, and attach a rotatable kit 60 (to be described later with reference to the collar). Note that this first stage lever 3 is urged to rotate in the direction of the arrow M by a compression spring /ja.

On the other hand, the third stage lever 3! As with the first stage lever 3, there is a push part 3ja and a shaft hole. A stopper part 4t6°7 and a protruding piece 1t are formed respectively, and an arc-shaped hole is provided around the shaft hole, and a second
Stage lever 3! A play part is provided for the bin J7 so that when the reel 3 rotates by a predetermined amount, the reel 3 rotates by about half of the maximum speed change rotation amount.
Provide an escape section for the movement of the

On the other hand, the 97-stage lever 36 has a push part JA similar to the lever described above.
a and the axial hole! O and some stoppers! l, j and protrusion j
A circular hole is formed around the shaft hole. Provide this arcuate hole! The front part of the bottle is not provided with a play part for the bottle 37, but the rear part is provided with an escape part i for the movement of the bottle 37 by the first stage lever JIK.

Therefore, when the third stage lever JA 'i is rotated in the direction opposite to the direction of the arrow, the reel 3.2 is moved to the third stage lever 6.
It rotates as one body.

In addition, the second stage lever 3j and the first stage lever 34 are color j!
They are each rotatably assembled via f, and the second stage lever 3! is a compression spring tzb, and W and 3-stage lever 3t are torsion springs! Each is urged to rotate in the direction of the arrow M by B. Fix j7 with screw 9 spring retainer.

Also, the protrusion on each stage lever is J, 411. ! Ahead of J fl&1
- Align the protrusions so that each protrusion is released and locked to the claw 7 at the same time.

And screw 9 spring holder j7, screw 0 d! 4. Plain washer zt, color! j1 31st R lever 36, 3rd stage L/ / (-31S17-k 32, stepping force 5-3t
, Xie I stage lever JP, force 2-11 flat washer j meeting, board 6
Shaft mounting part 1 shaft hole / 3 holes) 60 and oak) 4
Assemble by /. Also, the cover is secured to the screw hole of the support piece of the board t using 4 screws! Attach to.

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

3 first stage levers and 3 second stage levers! , and the third stage lever 36 are urged to rotate in the direction of the arrow M about the shaft 60'9f, and are urged to rotate in the direction of the arrow B about the claw core Fi axis/rf. .

First of all, sl! For reference, the first stage lever 3! The protruding piece sr is the claw.
7, the push portion 3ja is held in the lower position, and 1111! / By the step lever JWFi stopper hitting the board O, its pushing part jP& is held at the upper position. In this case, although not shown, the push portion jA& of the third stage lever 34 is also in the upper position. Therefore, in this case, the transmission (not shown) is brought into the second gear shift state through the interaction of the reel J- moving with the light first stage lever 31 and the inner wire.

Next, as shown in FIG. 1, when the first stage lever wJ is pushed down by 3ft, the pawl 27 is rotated by the protrusion 3 in the direction opposite to the arrow B, and the second stage lever 3j is released from the locking position of the pawl -7. It is about to be released, and as shown in the figure, when the first stage lever J is pushed down, the protrusion 3 pushes the claw core t in the opposite direction to the arrow B, causing the protrusion d l to be released. The second stage lever J because it is released from the claw core! The spring /jb rotates in the direction of the arrow M, and the stopper≠7 rotates to the stopping position.

At this time, the third stage lever J4 is also operated in the same manner, although not shown. On the other hand, the Ill/stage lever JP is held in the depressed position of the pusher 3 because the claw core is engaged with the protruding piece 4IJ. Therefore, the transmission (not shown) is brought into the first gear shift state via the inner wire p1 that is interlocked with this.

Also, although not shown, @If you push down the J stage lever 36, m
i, the λth gear lever J is turned on, the Jj is turned on, and the @JJR lever 36 is set to the lower position to enter the third gear shift state.

Toe 9 In the present invention, protruding piece 4t7 for bride, claw, 27
．． ≠1. Since the height of the IJ is made constant, pressing down on any one lever will release the other levers from their claws.

As described above, according to the device of the present invention, when one of the plurality of levers is pressed, the other lever automatically flips 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.

(Since the operating direction of the lever is only in the pushing direction for each step, it can be operated easily and safely by just moving the thumb while keeping the handle tm on.

(2) As many levers as the number of f speeds can be installed in succession, the desired speed can be directly selected.

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

[Brief explanation of the drawing]

Fig. 1 is a front view showing how the device of the present invention is installed, and Fig. 1 is a plan view with the cover 1 removed. ! FIG. 3 is an exploded perspective view thereof, and FIGS. .mu. to m.ltoreq. are explanatory views of the operation of the apparatus of the present invention. DA...inner wire, t...board, l...shaft mounting part, /ja, /jb...return spring, core...
Claw, 2...Torsion spring, 3...Reel, JJ.
...@K stage lever, It...1st stage lever, 32...
・1st stage lever, da 3. See t. ! J... protrusion, It... return spring.

Claims (1)

[Scope of Claims] 1. +7-ru J, 2 connected to the switching operation wire 4AI of the transmission to the shaft mounting portion/4 of the board B, which is a fixed member;
A plurality of levers 3, 31 and 34 are rotatably connected and supported on a shaft for operating each gear in relation to the 3 reels,
Each operating lever is 3, Jl. 7. Jl has protrusions each having the same protrusion length 1. Reference F, 13k and return spring/ja. /! b, 14 T- provided, and a claw 27Yr protruding piece with a spring kota interposed on the other hand! , Ql, jJ in the direction of engagement, and is rotatably supported on the board 6, and when any one of the three operating levers Jjt, J4 is pressed down and operated. A multi-speed changeover device for a bicycle, characterized in that only the protruding piece of the lever engages with the tip of the pawl core, and the protruding pieces of the other operating levers are disengaged from the pawl core.