JPH08332986A - Collapsible handle lock mechanism for bicycle - Google Patents

Abstract

PURPOSE: To provide lock mechanism that can lock and unlock the collapsing of handlebars and the expansion of a handle stem by the operation of one lever. CONSTITUTION: A handle stem has an inner stem 2 containing fitted into an outer stem 1 and lockably structured by a mortar 7. A stem upper part 4b is pivotally fixed to a stem lower part 4a, fixed to the upper end of the inner stem 2, through a hinge pin 6 so as to make handlebars 3 rotatable and tiltable to the side. The stem upper 4b is provided with an operating lever 5 and cams 10a, 10b for locking the inner stem 2 to and unlocking it from the outer stem 1 and also locking the stem upper part 4b to and unlocking it from the stem lower part 4a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism capable of locking and releasing a folding handlebar for a bicycle and extending and contracting a handlepost by a single lever operation.

[0002]

2. Description of the Related Art Folding handle posts are disclosed in Japanese Utility Model Publication Nos. 60-44891 and 60-44892 for facilitating the carrying of a bicycle and storing it in a small space. As a mechanism for folding the handle post, as shown in FIG. 5, the handle post is divided into a lower post 20a and an upper post 20b, and the split portion is connected by a hinge 21 and a lever type in which a bendable lever 22 is connected. As shown in 6, connect the connecting part to the pin 2
A lock pin type that locks with 3 is adopted, and as a mechanism that locks the expanding and contracting handle post, as shown in FIG. 7, a bolt fixing type that tightens and loosens the screws 31a and 31b in the outer post 30 with bolts 32, As shown in FIG. 8, an inner post 41 in the outer post 40 is of a quick release type in which the circumference of the outer post 40 is tightened and loosened by a screw shaft 42 and a lever 43.

[0003]

In the above conventional structure, the lock and lock release for folding the handle post and the lock and lock release for expansion and contraction of the handle post are separate operations. There are many problems that cannot be easily and quickly folded.

In view of the above conventional problems, an object of the present invention is to
It is an object of the present invention to provide a lock mechanism in which folding of a handlebar and expansion and contraction of a handlepost can be locked and unlocked by one lever operation.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention to achieve the above object is to construct a handle post from an outer post and an inner post that is fitted in the outer post and is locked by a us. A stem lower fixed to the upper end of the inner post, a stem upper pivotally attached to the stem lower via a hinge pin so as to be rotatable and tilted laterally with respect to the handle post, and a handle bar attached, and a flat surface on the stem upper. An operation lever that is rotatably provided in a lock position and an unlock position in the X-Y axis direction and that cooperates with the us via a rod, and the stem upper is in sliding contact with the lower surface of the operation lever, and the operation is performed. At the lever lock rotation position, the uss is pulled up to lock the inner post to the outer post and Lock the Tsu path to Sutemuroa, in the unlocked rotational position of the operating lever is obtained with the cams to unlock to Sutemuroa the Sutemuappa with unlocking to outer post to an inner post by pulling the mouse.

[0006]

With the above structure, by rotating the operation lever to the lock position with the inner post pulled up,
The cam lift of the cam with which the lower surface of the operating lever is in sliding contact pulls up the mouse to lock the inner post to the outer post and at the same time locks the stem upper to which the handlebar is attached to the stem lower to hold the handlebar in a proper posture. Also, by rotating the operating lever to the unlock position, the uss is pulled down to unlock the inner post with respect to the outer post, and at the same time the stem upper is unlocked with respect to the stem lower, and the inner post is lowered and stored in the outer post. The handlebar can be rotated and tilted laterally with respect to the handle post via.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an outer post, and an inner post 2 is extendably fitted in the outer post 1,
The outer post 1 and the inner post 2 constitute a handle post. 3 is a handlebar. The handle bar 3 is attached to a stem upper 4b, and the stem upper 4b is pivotally attached to a stem lower 4 fixed to the upper end of the inner post 2 via a hinge pin so as to be rotatable and tiltable laterally with respect to the handle post, and an operating lever. Locked and unlocked by 5.

Details of the above configuration will be described with reference to FIGS. The inner post 2 is fitted in the outer post 1 so that the inner post 2 can be stored therein, and is locked to the outer post 1 by the screw 7. A stem lower 4 is provided at the upper end of the inner post 2.
a is fixed, and the stem upper 4b is attached to the stem lower 4a.
Is hinged via a hinge pin 6 to a handle post composed of the outer post 1 and the inner post 2 so as to be able to rotate and tilt sideways, and a handle bar 3 is attached to a stem upper 4b.

A cutout recess 9 is provided in the stem upper 4b, and one end of an operating lever 5 is inserted into the cutout recess 9 so that one end of the operating lever 5 and the above-mentioned us 7 are connected to the stem lower 4a and the inner post 2. Are connected by a rod 8 penetrating the center of Then, the operation lever 5 rotates about the rod 8 in the plane to the lock position X and the unlock position Y in the XY coordinates.

The seat on the lower surface of the notched recess 9 of the stem upper 4b is in sliding contact with the lower surface of the operating lever 5, and at the lock position X of the operating lever 5, the uss 7 is pulled up in the Z-axis direction to form the inner post 2. Is locked to the outer post 1 and the stem upper 4b is locked to the stem lower 4a, and at the unlocked position Y of the operation lever 5, the uss 7 is pulled down in the Z-axis direction to unlock the inner post 2 from the outer post 1 and Stem upper 4
A pair of cams 10a and 10b having inclined cam lifts for unlocking b with respect to the stem lower 4a are fixed by sandwiching the rod 8 with the directions of the inclined cam lifts oriented in the relative directions.

In the above structure, the cam 10 is brought into sliding contact with the lower surface of the operation lever 5 by rotating the operation lever 5 to the lock position X with the inner post 2 being pulled up.
The cam 7 of a and 10b lifts the uss 7 to lock the inner post 2 to the outer post 1, and at the same time, the stem upper 4b to which the handle bar 3 is attached is locked to the stem lower 4a to hold the handle bar 3 in a proper posture.

By rotating the operating lever 5 from the lock position X to the unlock position Y, the cams 10a, 10a
The usb 7 is pulled down by the cam lift of b, the inner post 2 is unlocked with respect to the outer post 1, and the stem upper 4b is unlocked with respect to the stem lower 4a. As a result, the inner post 2 is lowered to be housed in the outer post 1, and the stem upper 4b is rotated upward with the hinge pin 6 as a fulcrum so that the handle bar 3 can be rotated and tilted laterally with respect to the handle post.

As a result, the inner post 2 is accommodated to shorten the overall length of the handle post, and the handle bar 3 is rotated and tilted to the side of the handle post as shown in FIG. 4, so that the handle portion is compact. The shape makes it easy to carry the bicycle and can be stored in a small space.

When the inner post 2 is housed and the handlebar 3 is rotated sideways to return from a folded state due to tilting to a normal use state, the inner post 2 is pulled up and the tilted stem upper 4b is rotated to a normal posture. The cams 10a, 10b with which the lower surface of the operation lever 5 is in sliding contact by returning the operation lever 5 to the lock position X and rotating it.
The cam 7 lifts the uss 7 to lock the inner post 2 to the outer post 1 and at the same time to lock the stem upper 4b to the stem lower 4a to hold the handlebar 3 in a proper posture.

[0015]

As described above, according to the present invention, by operating one operating lever, the inner post can be stored and deployed in the outer post, and at the same time, the handlebar which can be rotated and tilted to the side is locked and unlocked. With this configuration, the number of operation points and the number of operations in the folding and normal use states of the handle portion are greatly reduced, and simple and quick folding and normal use states can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a bicycle equipped with a handle lock mechanism of the present invention.

FIG. 2 is an exploded perspective view of essential components of the present invention.

FIG. 3 is a perspective view of an essential part of the present invention.

FIG. 4 is a perspective view showing a state in which the handlebar is tilted sideways.

FIG. 5 is an explanatory view of a lever type folding mechanism of a conventional handle post.

FIG. 6 is an explanatory view of a lock pin type folding mechanism of a conventional handle post.

FIG. 7 is an explanatory view of a bolt fixing type mechanism of a conventional handle post.

FIG. 8 is an explanatory view of a conventional quick release type handle post.

[Explanation of symbols]

 1 Outer Post 2 Inner Post 3 Handlebar 4a Stem Lower 4b Stem Upper 5 Operation Lever 6 Hinge Pin 7 Us 8 Rod 10a Cam 10b Cam

Claims (1)

[Claims] 1. A handle post is composed of an outer post and an inner post that is housed in the outer post and is locked by a us, and a stem lower fixed to an upper end of the inner post, and a hinge pin to the stem lower. Via the stem upper, which is rotatably and tiltably pivoted laterally to the handle post and to which the handle bar is attached, and rotatable in the plane of the stem upper to a lock position and an unlock position in the XY axis directions. An operating lever that is provided on the operating lever in cooperation with the us via a rod, and the stem upper is in sliding contact with the lower surface of the operating lever,
At the lock rotation position of the operation lever, the uss is pulled up to lock the inner post to the outer post and the stem upper is locked to the stem lower, and at the unlock rotation position of the operation lever, the uss is pulled down to the inner post to the outer post. A folding handlebar locking mechanism for a bicycle, comprising a cam that unlocks the stem upper and the stem lower with respect to the stem lower.