JPH07165144A - Handlebar locking device for bicycle - Google Patents

Abstract

PURPOSE:To prevent the theft trouble for a bicycle by preventing the excessively complicated operation and preventing the unreasonable lock release by breakage and a special tool. CONSTITUTION:A handlebar locking device for a bicycle is equipped with a locking mechanism 4 fixed with a cylindrical part 1 at the front end of a car body frame, movable member 5 which is constituted so that the getting-in/out state is controlled by the locking mechanism, and a cut part 7 formed over a front wheel fork 2 positioned in the cylindrical part 1 of a car body frame, and the movable member 5 is engaged with the cut part 7 in locking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle handlebar locking device having a mechanism for preventing a bicycle from being stolen due to improper unlocking or destruction.

[0002]

2. Description of the Related Art Many types of locks have been manufactured and used for bicycles since ancient times. A normal bicycle lock is attached to the fork part on the front wheel or rear wheel side of the bicycle, and when locking it, the movable rod of the lock enters between the spokes of the front wheel or the rear wheel and blocks free rotation. .

As a general lock, a cylinder lock or a magnet lock utilizing magnetism tends to be used frequently. With these locks, the pins that move in and out between the cylinder and the fixed part are selectively moved by the unevenness formed on the key side, and when all of these match, the cylinder can rotate and the lock at the tip of the cylinder The structure is such that the parts operate. Further, in the magnetic type, instead of the usual key having unevenness, the pin is selectively moved by the attractive repulsive force due to the polarity of the small magnet group embedded in the key. Such a structure can easily be formed in many combinations,
Although it is possible to manufacture a robust one, there is a limit to downsizing due to its structure, and it tends to be expensive.

Therefore, inexpensive bicycle locks are still often used in bicycles that are required to be compact and easy to operate. Therefore, since it is unlocked or destroyed by a relatively simple operation, the number of theft accidents is increasing, which is becoming a social problem.

Since various locks attached to this type of bicycle are illegally invalidated, a wire lock or a chain lock made of a special metal is used to make the wheels non-rotatable, and a spare lock is used in duplicate. There are also things to do. However, the usage is complicated, and many people still rely on old bicycle locks.

[0006]

SUMMARY OF THE INVENTION The present invention is a bicycle for preventing the operation from becoming excessively complicated, and preventing a breakage or an unjust unlocking operation by a special tool, thus preventing a bicycle theft accident. An object of the present invention is to provide a handle locking device for a vehicle.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a locking mechanism fixed to a tubular portion at the front end of a vehicle body frame, a movable member whose access state is controlled by the locking mechanism, and a tubular body of the vehicle body frame. And a cutout portion formed above a front wheel fork located inside the portion, wherein the movable member is formed so as to engage with the cutout portion when locked, and a bicycle handle locking device is provided. It

As the lock mechanism, various lock mechanisms can be adopted. For example, a mechanical or magnetic cylinder lock, a combination thereof, a number matching type, a card type or the like can be adopted. it can.

[0009]

The bicycle handlebar lock device according to the present invention will be described. When the bicycle handlebar lock device is locked, the movable member is pushed into and engaged with the notch formed in the connecting portion between the bicycle handlebar and the front wheel fork, so that the bicycle handlebar is freely locked. The steering wheel cannot be operated.
When unlocked by the proper unlocking means, the movable member returns to release the engagement with the notch, and the handle can be freely operated.

In this bicycle handle lock device, the lock mechanism is fixed to the body frame. Therefore, the lock mechanism alone cannot be removed. Further, even if the locking mechanism is broken, the movable member cannot be easily pulled out, the engagement between the movable member and the notch is maintained, and therefore the handle operation is still inconvenient. Therefore, the theft of the bicycle is prevented.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be disclosed below with reference to the accompanying drawings showing an embodiment of a bicycle handle locking device. A wide variety of lock mechanism operations, respective combinations, and compatible unlocking means can be adopted, and the technical scope of the present invention is not limited to these embodiments. FIG. 1 is a side view showing an embodiment of a bicycle handlebar locking device according to the present invention.

As shown in FIG. 1, an upper part of a front wheel fork 2 and a lower part of a handle 3 are connected in a tubular portion 1 at a front end of a frame of a bicycle. The lock mechanism 4 is fixed to the tubular portion 1 at the front end of the frame. Here, “fixed” means that it is integrated with the frame and cannot be easily removed, or that it is firmly attached.

FIG. 2 is a side sectional view and an upper sectional view showing the internal structure of the bicycle handlebar locking device shown in FIG. Inside the lock mechanism 4, there is a movable member 5, and the lock mechanism 4
It is possible to move like a double-headed arrow 6 under the control of. A notch 7 is formed in the fork 2 located at the tip of the movable member 5.

FIG. 3 shows a locked state in which the movable member 5 engages with the notch 7 and restrains the free operation of the handle. As is apparent from such a locked state, the tip end of the movable member 5 and the notch 7 are required to have a structure and a material that are securely engaged with each other and are not easily broken.
Also, when unlocking, so as not to hinder the handle operation,
It is formed in a structure that will surely return. Not only the notch 7 is formed in the fork, but also the handle portion may be formed with a notch so that the tip of the movable member 5 also engages with the notch in the handle portion in the locked state. . This results in a more solid lock. In this case, it is preferable that the notch of the handle portion is a slot having a length of several cm in the vertical direction or several notches are formed in the vertical direction so that the height of the handle can be adjusted.

FIG. 4 is a front view of the lock mechanism, which shows the movable member 5.
A key hole 41 formed integrally with or separately from the above is provided. A key (not shown) is inserted into the key hole 41 and locked or unlocked while rotating.

It is desirable that the movable member 5 itself is engaged with the tubular portion of the lock mechanism 4 or the bicycle frame, and the movement is hindered only by breaking the upper portion. For example, as shown in FIG. 5, a movement inhibiting structure, for example, a screw thread 8 or a cylinder pin is provided on the surface of the movable member 5 so that it cannot be pulled out unless it is rotated. To prevent this rotation, a structure similar to the pin of the cylinder lock can be provided.

Further, when the movable member 5 is locked, the head does not project outward, and the gap between the peripheral fixing portion and the movable member 5 is small, so that it cannot be forcibly pulled out by pliers or pliers. convenient.

In the embodiment shown here, a lock mechanism using a key is disclosed, but well-known configurations such as a number-matching lock, a card lock, a magnetic lock and the like can be appropriately adopted.

[0019]

According to the bicycle handlebar locking device of the present invention, since the locking mechanism is fixed to the frame,
It cannot be easily removed. The movable member acts to lock the frame and the upper portion of the front wheel fork at a predetermined position during locking so that the handle cannot be operated. Therefore, a bicycle whose steering wheel cannot be operated cannot be ridden and theft can be prevented.

Such an effect continues even if only the surface of the lock mechanism is broken and the movable member cannot be pulled out. In addition to such a handle locking device, a further anti-theft effect can be expected by using it together with a lock for restraining the rotation of the front wheel or the rear wheel.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an arrangement of a bicycle handlebar locking device according to the present invention.

FIG. 2 is a side sectional view and an upper sectional view showing a structure of a bicycle handlebar locking device according to the present invention.

FIG. 3 is a side sectional view and an upper sectional view showing a locked state of the bicycle handle lock device according to the present invention.

FIG. 4 is an explanatory view showing the structure of the lock mechanism of the bicycle handlebar locking device according to the present invention.

FIG. 5 is an explanatory view showing a structural example of a movable member of the bicycle handlebar locking device according to the present invention.

[Explanation of symbols]

 1 frame 2 front wheel fork 3 handle 4 locking mechanism 5 movable member 7 notch 8 screw thread 41 keyhole

Claims (2)

[Claims] 1. A lock mechanism (4) fixed to a tubular portion (1) at a front end of a vehicle body frame, a movable member (5) whose access state is controlled by the lock mechanism, and a tubular portion of the vehicle body frame. (1) has a notch (7) formed above the front wheel fork (2), and the movable member (5) engages with the notch (7) when locked. A handlebar locking device for a bicycle, characterized in that it is formed as follows. 2. The bicycle handle locking device according to claim 1, wherein the movable member (5) itself is provided with a movement inhibiting structure (8).