JPS5942303Y2 - Bicycle handlebar release prevention safety device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety device for preventing a detachable handle from a folding bicycle or the like while the bicycle is running.

Disassembly type - For folding bicycles etc. equipped with a handlebar, the clamp part of the lug that secures the handlebar can be attached to and removed from the handlebar post, allowing the user to easily disassemble and assemble the handlebar and handlepost. It looks like this.

During assembly, the user does not use tools and fixes the clamp part to the handle post by tightening the screw with a lever, but general consumers who are not familiar with machine assembly often tighten the clamp part with the screw. If the tightening force is insufficient, the tightening screws may loosen while the bicycle is running, and the handlebar may come off from the handlebar post, making it impossible to control the bicycle and causing the bicycle to fall over, which may result in a serious accident. there were.

In view of the above-mentioned drawbacks of the disassembly type handle for folding bicycles, the present invention prevents the handle bar from coming off even if the tightening screw is weak and loosens while riding. The purpose of the present invention is to provide a safety device that prevents the bundle from falling away, which can prevent danger from occurring.

That is, the present invention provides a folding bicycle in which the handlebar can be attached and detached from the handlebar post by operating a lever on the lug clamp, and an annular groove formed by integrally joining an upper washer and a lower washer to the upper end of the handlebar post. At the same time, the eccentric washer, which has an eccentric oval hole and is always biased in the eccentric direction by a spring, is loosely fitted into the annular groove. To provide a safety device for a bicycle handlebar, which prevents a handlebar from easily separating from a handlebar post even if the handlebar is loosened, and allows the handlebar to be easily attached and detached by returning an eccentric washer to a concentric position.

Next, the content of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an assembled view, partially in cross section, of the safety device for preventing detachment of the handle of the present invention.

FIG. 2 is a partially sectional front view of the lug 2 to which the handle bar 1 is fixed, and FIG. 3 is a plan view thereof.

Reference numeral 3 designates a handle post, the lower end of which is fitted onto the hawk stem 4, and is fixed by a pull-up rod 5 and a nut 6 whose upper surface is threadedly engaged and has a sloped shape.

As shown in FIGS. 4 and 5, a detent/T projecting horizontally is provided on the upper part of the handle post 3.

The clamp part 8 of the lug 2 to which the handlebar 1 is fixed is fitted to the upper end of the handle post 3, and the notch 9 of the clamp part is fitted to the detent pin 7, and the clamp part 8 of the lug 2 is tightened. By tightening the screw 10 and the lever 11 that engages with the screw 10, the steering wheel bar is always fixed to the handle post at a fixed engagement position.

A flat washer 13 having the same diameter as the upper washer 12 whose outside diameter is approximately the outside diameter of the handle post is integrally connected to the upper end of the handle post to form a washer 15 having an annular groove 14, into which the lifting bale 5 is inserted. It is fixed to the upper end of the nozzle post 3 by tightening it with a nut 6.

The annular grooved washer 15 is the upper washer 1 shown in FIGS. 6 and 7.
2 and a flat washer 13 shown in FIGS. 8 and 9 that fits therein.
The upper washer 12 has a stepped portion 16 in the middle, and the outer diameter of the lower end of the upper fall washer 12 has a corresponding diameter to which the inner diameter of the flat washer 13 just fits.

After fitting an eccentric washer 17 (described later) to the stepped portion 16 of the upper washer 12, fitting the flat washer 13 and enlarging the lower end of the upper washer 12 that protrudes from the lower end of the flat washer 13, the upper washer 12 and the flat washer 1
3 is integrated, and the stepped portion 16 of the upper washer 12 is connected to the annular groove 1.
4 to form a washer 15 having an annular groove 14.

Eccentric washers 17 fitted in this annular groove 14 are numbered 10 to 1.
As shown in Figure 2, the outer diameter is approximately equal to the outer diameter of the upper end of the handle post 3, and consists of a circle A concentric with the outside of the eccentric washer and a circle centered at a point O' eccentric from the center O by a certain distance l. B, and an elliptical eccentric hole 18 drawn by a tangent line that touches both circles A and B.

A notch 20 for housing the compression coil spring 19 is provided inside the oval eccentric hole 18 of the eccentric washer 17 in the direction opposite to the eccentric direction.

Diameter D of the above inner diameters A and B (d Outer diameter D of the stepped portion 16 of the upper washer 12
The thickness d of the eccentric washer 17 is slightly smaller than the height d' of the stepped portion 16, and the eccentric washer 17 is loosely fitted into the annular groove 14 formed by the stepped portion 16.
Regardless of the tightening of the pulling rod 5, the eccentric washer 17 is always kept in an idle state.

If the compression coil spring 19 is inserted into the notch 20 and the eccentric washer 17 is fitted into the annular groove 14 of the washer 15, the eccentric washer 1
7 is always stretched so as to be in an eccentric state as shown in FIG. 13, and can be easily brought into a concentric state as shown in FIG. 14 by pressing with a finger the portion of the eccentric washer 17 that protrudes from the annular groove 14. .

Further, a KU step 21 is provided on the lower surface of the flat washer 13, and the diameter thereof is such that it fits exactly into the inner diameter of the handle post 3, so that it is always stably inserted into the handle post 3Vc.

Next, the operation of the safety device of the present invention will be explained.

When attaching the removed handle bar 1) to the handle post 3, use the annular groove 14 of the washer 15 as shown in Figure 1.
After pushing the more protruding portion of the eccentric washer 17 into the annular groove against the force of the spring 19 to the state shown in Fig. 15,...
The clamp part 8 of the rack 2 to which the handle bar 1 is fixed is fitted to the handle post 3.

At this time, handle post 3, washer 15 and eccentric washer 17
have approximately the same outer diameter and are aligned on the same axis, so the clamp portion 8 can be easily inserted.

When the notch 9 of the clamp part 8 is fitted into the detent T and inserted at the predetermined position 1, the eccentric washer 17 protrudes above the clamp part 8, so the elasticity of the spring 19 causes the eccentric washer 17 to become eccentric. It slides as shown in FIG. 1.

Further, the lever 11 of the tightening screw 10 is turned to reduce the diameter of the clamp part 8, and the handlebar 1 and lug 2 are fixed to the handle post 3.

While the bicycle is running in this state, even if the tightening screw 10 becomes loose, the eccentric washer 11 that protrudes laterally prevents the clamp part 8 of the lug 2 from coming off upward from the handle post 3, Since the ring 7 is engaged with the notch 9 of the clamp part 8, even if the tightening screw 10 is loosened, there is no problem in the handle operation.

Moreover, the occupant can sense the loosening of the tightening screw 10 and prevent accidents.

In addition, when removing the handlebar 1, loosen the lever 11 of the tightening screw 10 and push the eccentric washer 17 into the annular groove 14 to the state shown in FIG. 7. The handle can be immediately pulled out from the handle post 3, and the handle can be easily removed and disassembled.

According to the safety device of the present invention, even if the handlebar tightening screw 10 loosens while the assembled bicycle is running, the handlebar will not fall off, and accidents caused by this can be prevented. At the same time, the handle has the remarkable effect of being extremely easy to attach and detach.

[Brief explanation of the drawing]

FIG. 1 is a partially assembled view of the bicycle handle separation prevention safety device of the present invention. Fig. 2 is a front view of the rack of the safety device of the present invention, Fig. 3 is a plan view of the same, Fig. 4 is a front view of the locking pin part of the bar and handle post, Fig. 5 is a plan view of the same, and Fig. 6 is a plan view of the rack. A partially sectional front view of the upper washer used in the present invention, FIG. 7 is a plan view thereof, FIG. 8 is a partially sectional front view of the lower washer, FIG. 9 is a plan view thereof,
Figure 10 is a front view of the eccentric washer used in the present invention,
Fig. 1 is a plan view of the same, Fig. 12 is an explanatory view of the same, Fig. 13 is a plan view showing the eccentric state of the eccentric washer, Fig. 14 is a plan view of the eccentric washer pushed back to the concentric state, and Fig. 15 is the eccentric state. FIG. 3 is a cross-sectional view of the safety device of the present invention with the washer pushed back into a concentric state; Explanation of symbols, 1...Handlebar, 2...
...Rack, 3...Handle post, 4...
... Hawk stem 5 ... Pulling rod, 6 ...
...nut, 7...rotation pin, 8...
... Clamp part, 9 ... Notch, 10 ...
...Tightening screw, 11...Lever, 12...
...Top washer, 13...Flat washer, 14...
...Annular groove, 15...Washer, 16...
Danbe, 17. ...Eccentric washer, 18...Eccentric hole, 19...Coil spring, 20...
Notch part, 21... step.

Claims (1)

[Scope of utility model registration request] The clamp part of the lug to which the handlebar is fixed is fitted into the upper end VC of the handlebar post, and the clamp part is tightened with a tightening screw and lever, and the handlebar is removably attached to the handlebar in an assembly type bicycle. A detent pin is provided horizontally protruding from the upper part of the post, a notch is provided in the clamp portion to engage with the detent pin, and an upper washer and a lower washer are integrally coupled to the upper end of the handle post. An eccentric washer that fixes a washer having an annular groove configured, has an eccentric oval hole whose outer diameter is approximately the same as the diameter of the handle post, and is equipped with a spring that constantly presses in the eccentric direction. A safety device for preventing detachment of a bicycle handlebar, characterized in that a bicycle handlebar is fitted into the annular groove.