JPH057594U - Bicycle gear shift operation device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a grip control type speed change operation device in which the speed change device is switched and operated by rotating a handle grip. [Structure] A shifter bearing 3 and a ratchet body 5 having ratchet teeth 4 are integrally fixed, and the ratchet body 5 is provided.
A winding drum 9 provided with a claw 8 is externally fitted to the outer periphery of the claw 8 and a tip of the claw 8 rotatably supported by a claw shaft 7 is attached so that the claw spring 10 meshes with the ratchet teeth 4. On the other hand, on the other hand, the shifter drum is rotatably attached to the outer periphery of the shifter bearing 3 so as to face the take-up drum 9, and at the same time, via a joint hole 17 provided in the take-up drum 9. A mechanism for releasing the meshing between the pawl 8 and the ratchet tooth 4 is formed, and a shifter pin 15 is planted on the shifter drum.
This is loosely inserted and engaged with the joint hole 17, and the claw 8 and the shifter pin 15 are engaged with each other by the rotation of the shifter drum, and the engagement between the claw 8 and the ratchet teeth 4 is released.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a switching operation tool for operating a transmission of a bicycle. , Especially the grip of the handle is configured to rotate, and the rotation of this grip changes the Grip and control type gear shifting operation that switches the speed device It relates to the device.

[0002]

[Prior art]

  Conventionally, this type of grip control type speed change operation device has been disclosed in -13107, JP-B 37-6029, etc. The lip is returned by the return force of the operating wire (return spring force of the transmission). It is well known to have a click mechanism using a ball in order to prevent And use a stop pin as shown in Japanese Utility Model Publication No. 44-18334. The former method is also disclosed.

[0003]

[Problems to be solved by the device]

  As shown in FIG. 7, a conventional bicycle gear shift operation device generally includes an upper pipe 23, Since it was installed at a position apart from the handle of the lower pipe 24 etc. When changing gears, the driver should shift his / her hand from the grip of the steering wheel while driving. The operation lever 25 of the equipment is operated, and it is necessary to drive with one hand during this period. It was very dangerous. And recently, a mountain bike that runs especially on bad roads The danger level has increased with the epidemic.

[0004]   Therefore, a device for bringing the gear shift operating device closer to the grip portion of the handle is being made. However, in the currently used operation lever type gear shifting operation device, Even if the operation lever 25 is brought close to the grip, the lever operation is eventually performed with the finger, so the lever When operating the, be sure to remove the fingers holding the grips before shifting. I have to. For this reason, the grip of the handle becomes weak, and the gear shifting operation is delayed. There were problems on all fronts.   In this respect, the above-mentioned grip control shift operation device does not operate the grip portion of the handle. Since you can shift gears while holding your hand, you can operate quickly and safely, especially on rough roads. It is suitable for mountain bikes to go.

[0005]   However, the gear shift operating device shown above (Japanese Utility Model Publication No. Sho 36-13107, Japanese Utility Model Publication No. Japanese Laid-Open Patent Publication No. 37-6029) discloses that a gearshift operating device is provided in a gearbox (gearbox). A click mechanism using a ball is adopted so that it is not returned by the force of the turn spring. is doing. Therefore, when operating in opposition to the pulling direction of the return spring Is mounted on the groove against the force of the return spring and the force of the ball pressing spring. It is necessary to provide the operating grip with a force that overcomes the surpassing force, and also a return spring. When operating in the same direction as the force of the ball Apply the force obtained by subtracting the force of the return spring to the operating grip Need to get.   Therefore, there is a large difference between the pulling force and the returning force of the operation wire, which is eliminated. In order to balance the force by strengthening the pressure spring of the ball, In addition, a relatively large force is required when operating the gear shift operating device in either direction. It is important to say that the operation is heavy and it is difficult to adjust the spring pressure (friction). There was a problem.

[0006]   On the other hand, the one disclosed in Japanese Utility Model Publication No. 44-18334 solves the above problem. In order to achieve this, a stop pin with diagonal claws is used. When changing gears, grasp the stop pin in the required direction to remove it. Move the hand, search for the pressing part, confirm it, and then press the pressing part to operate the grip. It is necessary to rotate and shift gears.   Therefore, even with this device, you can immediately change gears while firmly holding the operating grip. It still has the drawback of not being able to operate.

[0007]   The present invention eliminates the above-mentioned problems of the conventional type, and provides an operating grip. Gear shifting that can be locked securely in place with a light force while maintaining a firm grip The purpose is to provide an operating device.

[0008]

[Means for solving the problem]

  In order to achieve this purpose, the present invention has the following configuration.   That is, the gear shift operation device according to the present invention is changed by the rotation of the grip portion of the handle. A shift operating device for a bicycle, which is configured to switch and operate a speed device. -On the bracket 2, the ratchet body 5 having the shifter bearing 3 and the ratchet teeth 4 is attached. The ratchet body 5 is integrally fixed to the outer circumference of the ratchet body 5, and the claw 8 and the wire groove 11 and the wagon A winding drum 9 provided with an ear-locking tool is fitted on the outside and rotated by the pawl shaft 7. The ratchet teeth 4 are engaged with the toes of the pawl 8 which is freely supported by a pawl spring 10. On the other hand, on the other hand, on the outer periphery of the shifter bearing 3, facing the winding drum 9, the shifter The drum 16 is rotatably inserted and a joint wheel provided on the take-up drum 9. The mechanism for releasing the engagement between the claw 8 and the ratchet tooth 4 is formed via the lever 17. The present invention relates to a characteristic bicycle gear shift operation device.

[0009]   In particular, in the mechanism for releasing the engagement between the claw 8 and the ratchet teeth 4, The shifter pin 16 is planted in the shifter drum 16, and this is attached to the joint hole 17 The shifter drum 16 is rotated to engage the claw 8 and the shifter pin 15 with each other. It is preferable to disengage the claws 8 and the ratchet teeth 4 from each other, and A shaft 21 is planted in the notch 8, and the shaft 21 is loosely inserted and engaged in the joint hole 17, The shaft 21 and the shifter drum 16 are engaged by the rotation of the lid drum 16. A mechanism for releasing the engagement between the claw 8 and the ratchet tooth 4 is also conceivable.

[0010]   The present invention includes a shifter shaft and an operation lever bracket 2 fixed to the handlebar-1. The ratchet body 5 having the bridge 3 and the ratchet teeth 4 is fixed by, for example, a fixing bolt 6. The ratchet body 5 is integrally fixed to the outer periphery of the ratchet body 5 and is rotatable by a pawl shaft 7. The winding drum 9 having the supported claw 8 is externally fitted, and the tip of the claw 8 is clamped by a claw spring 10. It is urged so as to mesh with the teeth 4.   The winding drum 9 has a wire groove 11 and, for example, a disengagement prevention pin 12. A wire-locking device is provided to lock the operation wire-13 and One end of the water wire 14 is fixed to the operation lever bracket 2.

[0011]   On the other hand, as a mechanism for releasing the engagement between the pawl 8 and the ratchet teeth 4, for example, The shifter drum 16 having the shifter pin 15 planted on the outer periphery of the lid bearing 3 is rotated by itself. A joint which is inserted into the winding drum 9 and is provided with the shifter pin 15 on the winding drum 9. It is configured so as to be loosely engaged with the hole 17.   In addition, the operation grip 18 and the shifter drum 16 are integrally formed so as to rotate together. Is stuck to.   That is, the gear shift operating device according to the present invention is a ratchet mainly having ratchet teeth 4. The body 5 and the winding drum 9 incorporating the claw 8 and a releasing mechanism for removing the claw 8 It is composed of a shifter-drum 16 equipped with.

[0012]

[Action]

  The operation of the gear shift operating device of the present invention described above will be described.   When operating the operation wire (inner wire) 13 in the pulling direction, 2, the winding drum 9 is moved to the left (A by operating the shifter drum 16). Direction). Then, the claw 8 and the ratchet attached to the winding drum 9 Since the ratchet teeth 4 provided on the body 5 are in the direction of engagement and disengagement, the ratchet It can rotate without being restricted by the tooth 4. On the other hand, rotation of the shifter drum 16 When it comes to the stop-free state, the ratchet teeth 4 and the toes of the claw 8 are engaged with each other, and as shown in FIG. As described above, the clockwise rotation of the winding drum 9 is blocked.

[0013]   On the other hand, when operating the operation wire-13 in the return direction, the shifter drum 16 As shown in FIG. 3, it is forcibly rotated to the right (direction B). Then, the shifter-drum 16 is planted. The shifter pin 15 provided is loosely inserted and engaged in the joint hole 17 of the winding drum 9. Therefore, the shifter pin 15 pushes down the left inclined surface of the claw 8 as shown by an arrow C, In conjunction with this, remove the right toe of the nail 8 from the ratchet teeth 4 as shown by the arrow D, and shift it. The right rotation of the tar drum 16 is possible.

[0014]   As described above, in the present invention, the claw 8 is moved by the rotation of the shifter drum 16. As it can be easily removed from the chette teeth 4, hold the operating grip 18 firmly. By simply rotating the operating grip, you can quickly change gears. Moreover, Since the balance resistance between the pulling direction and the returning direction of the operating wire-13 is unnecessary, This has the effect that the gear shifting operation is light.

[0015]

【Example】

  Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.   1 is a longitudinal sectional view of a bicycle gear shifting operation device according to an embodiment of the present invention, and FIG. FIG. 3 is a transverse sectional view of the ZZ of FIG. 3, showing movements of the shifter pin and the nail in the embodiment of the present invention. 2 is a partial cross-sectional view taken along the Y line in FIG.

[0016]   In the figure, 1 is a handlebar of a bicycle, and 2 is fixed to the handlebar-1. The operation lever bracket. The handlebar-1 and the operation lever bracket The ratchet body 5 having the ratchet teeth 4 together with the shifter bearing 3 Insert it and fix it so that it does not rotate with respect to the handlebar-1 and operation lever bracket 2. Secure with bolts 6.   A claw rotatably supported by a claw shaft 7 on the outer circumference of the ratchet body 5. The take-up drum 9 to which 8 is attached is fitted onto the outside of the take-up drum 9, and the tip of the claw 8 is fixed by the claw spring 10 Energize ratchet teeth 4.   The winding drum 9 is provided with a wire groove 11 and a disengagement prevention pin 12, and The wire terminal 19 provided at the rope end of the operation wire 13 is locked, and the wire The operation wire-13 is inserted into the groove 11. On the other hand, the outer wire-14 has one end Is fixed to the operation lever bracket 2.

[0017]   Further, the shifter pin 3 is provided on the outer periphery of the shifter bearing 3 so as to face the winding drum 9. The shifter drum 16 in which 5 is planted is rotatably inserted, and The hook 15 is loosely inserted into a joint hole 17 provided on the take-up drum 9 to engage with the pawl 8 and the latch. This is a mechanism for releasing the tooth 4.

[0018]   In addition, the operation grip 18 is integrally attached to the outer periphery of the shifter drum 16. And attach the handle grip 20 to the handlebar-1 outside the grip end. To do.

[0019]   Since the present invention is configured as described above, the operation wire (inner wire) When operating 13 in the pulling direction, operate the shifter drum 16 as shown in FIG. By doing so, the winding drum 9 is rotated leftward (direction A). Then, the winding Claws 8 attached to the ram 9 and ratchet teeth 4 provided on the ratchet body 5 Is in the direction of disengagement, it can be rotated without being restrained by the ratchet teeth 4. When the shifter drum 16 stops rotating and becomes free, the ratchet teeth 4 And the toes of the claw 8 mesh with each other to prevent the winding drum 9 from rotating to the right as shown in FIG.

[0020]   On the other hand, when operating the operation wire-13 in the return direction, the shifter drum 16 As shown in FIG. 3, it is forcibly rotated to the right (direction B). Then, the shifter-drum 16 is planted. The installed shifter pin 15 is loosely inserted and engaged with the joint hole 17 of the winding drum 9. Therefore, the shifter pin 15 pushes down the left inclined surface of the claw 8 as shown by an arrow C, In conjunction with that, remove the right toe of the nail 8 from the ratchet teeth 4 as shown by the arrow D, The right rotation of the tar drum 16 is possible.

[0021]   FIG. 5 shows another example of the mechanism for releasing the pawl 8 and ratchet teeth 4 of the present invention in the vicinity of the pawl 8. FIG. 3 is a partial cross-sectional view showing a joint hole 17 of a pawl 8 that meshes with the ratchet teeth 4. Formed in the inner position, shifter pin 15 directly releases pawl 8 from ratchet tooth 4 It is a mechanism to do.

[0022]   FIG. 6 is a pawl showing a further example of the mechanism for releasing the pawl 8 and ratchet teeth 4 of the present invention. 8 is a partial cross-sectional view of the vicinity of FIG. 8 in which the left claw 8 is loosely engaged with the joint hole 17; The shaft 21 is planted, and the shifter drum 16 is attached to the shaft 21. The inclined step portion 22 is formed, and when both are forcedly rotated to the right, they are engaged with each other. To remove the right toe of the nail 8 from the ratchet teeth 4 and rotate the shifter-drum 16 to the right. It makes it possible.

[0023]

[Effect of device]

  As described above, in the present invention, the return spring provided in the transmission is Since the ratchet mechanism is used to prevent the take-up drum from returning, Prevents the operation grip from being returned like a click mechanism using a conventional ball It eliminates the need for friction and balance resistance to keep the balance of reciprocating force. Therefore, there is an effect that the shifting operation is very light.

[0024]   In addition, in the present invention, the operation grip is always gripped together with the handle grip. When changing gears, change your fingers or shift your hand. Operation can be performed by simply turning the operation grip while firmly holding it, and There is no need to worry about the operating grip being turned by a shock on the road, so Moreover, there is an effect that the shift operation can be performed safely.   As described above, according to the present invention, many excellent effects can be obtained in practical use and safety.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention.

FIG. 2 is a transverse sectional view taken along line ZZ of FIG.

3 is a cross-sectional view showing movements of a shifter pin and a claw in the embodiment of FIG.

FIG. 4 is a partial cross-sectional view taken along the line Y of FIG.

FIG. 5 is a partially enlarged view showing another example of the releasing device in the embodiment of the present invention.

FIG. 6 is a partially enlarged view showing still another example of the releasing device in the embodiment of the present invention.

FIG. 7 is a side view of a bicycle equipped with a conventional lever-type shift operation device.

[Explanation of symbols]

1 Handlebar 2 Operation lever bracket 3 ... Shifter bearing 4 ... Ratchet teeth 5 ... Ratchet body 6 ... Fixing bolt 7 ... claw shaft 8 ... Nails 9 Winding drum 10 ... Claw spring 11 ... Wire-groove 12: Removal prevention pin 13 Operation wire (Inner wire) 14 Outer wire 15 ... Shifter pin 16 ... Shifter drum 17 ... Joint hole 18: Operating grip 19 Wire terminal 20 ... Handle grip 21 ... Shaft 22 ... Inclined step 23 ... Upper pipe 24 Lower pipe 25 ... Operation lever

Claims (3)

[Scope of utility model registration request] 1. A bicycle gear shifting operation device in which a gear shifting device is operated by rotating a grip portion of a handle, wherein a shift lever bearing 3 is attached to an operation lever bracket 2.
And a ratchet body 5 having ratchet teeth 4 are integrally fixed, and a winding drum 9 having a claw 8 and a wire-groove 11 and a wire-locking device is externally fitted to the outer circumference of the ratchet body 5. , The tip of the pawl 8 rotatably supported by the pawl shaft 7 is urged by a pawl spring 10 so as to mesh with the ratchet teeth 4, while the outer periphery of the shifter bearing 3 faces the winding drum 9. Then, the shifter drum 16 is rotatably inserted, and a joint holder provided on the winding drum 9 is installed.
A gear shift operation device for a bicycle, characterized in that a mechanism for releasing engagement between the pawl 8 and the ratchet teeth 4 is formed via the lever 17. 2. A shifter pin 15 is planted in the shifter drum 16, and the shifter pin 15 is loosely inserted and engaged in a joint hole 17, and when the shifter drum 16 is rotated, the claw 8 and the shifter pin 15 are formed. The gear shift operation device for a bicycle according to claim 1, wherein the claw 8 and the ratchet teeth 4 are disengaged from each other by engaging the gear. 3. A shaft 21 is planted in the pawl 12, the shaft 21 and the shifter drum 16 are loosely inserted into and engaged with a joint hole 17, and the shaft 21 and the shifter drum 16 are rotated by rotating the shifter drum 16.
The gear shift operating device for a bicycle according to claim 1, wherein the claw 8 and the ratchet teeth 4 are disengaged from each other by engaging with and.