JPH0723353Y2 - Bicycle head lock device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle headlock device which can be simply and securely headlocked without requiring any special tool.

[0002]

2. Description of the Related Art Conventionally, in a bicycle such as a manten bike or a wheeled car, which is disassembled, wheeled, and assembled at the site, a head lock is provided at the upper end peripheral portion of a hawk stem inserted in a head pipe. It has been carried out by manually screwing a nut to be screwed into the screw groove into the screw groove as much as possible, performing one final rotation with a tool such as a spanner, and fixing the nut in the screw groove.

[0003]

However, this method requires a tool such as a spanner for giving the nut one final rotation, and it is inconvenient that this must be constantly carried during cycling.

In this method, a nut such as a spanner is used to make one final rotation of the nut, but the force for giving this one rotation varies from person to person, and therefore the head lock also varies from person to person, so that the head lock is reliable. In some cases it has not been done.

[0005]

In order to solve the above problems, according to the present invention, a nut screwed in a screw groove provided in an upper peripheral portion of a hawk stem inserted in a bicycle head pipe. A bicycle head lock device is proposed in which a lever for lifting the nut and fixing the lever in the screw groove is pivotally attached to the peripheral portion of the bicycle in its raised state.

[0006]

In other words, in the present invention, the nut can be fixed to the screw groove provided on the upper peripheral edge portion of the hawk stem simply by raising the lever pivotally mounted on the peripheral edge portion of the nut.

Therefore, in this invention, it is not necessary to carry a special tool for fixing the nut, and the nut can be surely fixed in the screw groove without individual difference.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. Reference numeral 1 is a bicycle head pipe, and 2 is a one provided at the upper end of the head pipe 1.

A hawk stem 3 is inserted in the head pipe 1, and a screw groove 4 is provided on the upper edge of the hawk stem 3.
Is screwed, and a nut 6 is screwed into the screw groove 4 via a washer 5.

On the other hand, 7 lifts the nut 6 to screw groove 4
It is a bifurcated lever that fixes the nut 6 to the
Is the distance (A +) from its tip 7a to the center 8a of the pivot 8
It is pivotally attached to both ends of the peripheral edge portion of the nut 5 by making (α) slightly (α) longer than the distance (A) between the lower end portion 7b and the center 8a of the pivot portion 8.

In the above structure, when the head is locked, the nut 6 is manually screwed into the screw groove 4 of the hawk stem 3, and when the screw cannot be screwed by hand, the knob 9 of the lever 7 is pulled up. The lever 7 is raised while rotating around the pivot portion 8.

As a result, the lever 7 stands up with the peripheral end face from the lower end 7b to the tip 7a being in contact with the upper end of the washer 5. In this case, the distance between the tip 7a and the center 8a of the pivot 8 is set. Since the distance from the lower end portion 7b to the center 8a of the pivotally attached portion 8 is longer by α, the nut 6 is lifted by α when the lever 7 is in the upright state, and as a result, the screwing surface of the nut 6 has the screw groove 4 And the nut 6 is fixed to the screw groove 4.

Therefore, in this invention, the head lock can be performed without the need for a special tool such as a spanner.

Further, in this invention, by raising the lever 7, the head can be locked with a constant force and surely.

The present invention is convenient for wheeled vehicles and the like because it can be head-locked without the need for a special tool such as a spanner, but it is not particularly limited to this, and it can be used for general bicycles and the like. Can also be used for

[0016]

In summary, according to the present invention, it is possible to surely lock the head with a constant force without requiring a special tool such as a spanner and by raising the lever.

[Brief description of drawings]

1A and 1B show a procedure of head lock according to the present invention, FIG. 1A is a side view showing a state before head lock, and FIG. 1B is a side view showing a state where head is locked.

FIG. 2 is a perspective view of the head lock device of the above.

[Explanation of symbols]

 1 Bicycle head pipe 2 One 3 Hawk stem 4 Screw groove 5 Washer 6 Nut 7 Bifurcated lever 8 Pivoting part 9 Picking part

Claims (1)

[Scope of utility model registration request] 1. A screw groove provided on a peripheral edge of an upper end of a hawk stem inserted into a head pipe of a bicycle. A bicycle head lock device characterized in that a lever for fixing to a bicycle is pivotally attached.