JPH09125760A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the convenience of use by automatically resetting a key to the insertion and drawing position in the case of releasing the lock. SOLUTION: A rear end of a rotor is formed with a 1/4 circular shaft part 14, which is formed by cutting 3/4 of a shaft inside of a rear end cylinder part. The 1/4 circular shaft part 14 is formed with engaging projections 15, 16 in the circumference part thereof. The tip of both the engaging projections 15, 16 are opened at 180 degree at the center thereof and arranged opposite to each other in the radial direction. At the unlock position, the engaging projection 15 is engaged with a locking end 9 of a torsion spring 8. When the rotor is turned from the unlock position to the lock releasing position, the torsion spring 8, of which locking end 9 is engaged with the engaging projection 15, is caught in. The returning spring elastic force of the torsion spring 8 is applied to the rotor, and the rotor is automatically reset to the unlock position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cylinder lock which is locked and unlocked by a key operation to control lock / unlock of a lock mechanism.

[0002]

2. Description of the Related Art A cylinder lock used for locking / unlocking a door door lock mechanism of a passenger car is rotated by rotating a key from a key insertion / removal position in a clockwise direction to be unlocked, and is rotated in a counterclockwise direction to be locked. To do. Also, the cylinder lock used to unlock the lock mechanism of the trunk lid is unlocked by rotating it clockwise from the key insertion / removal position by key operation and by rotating it counterclockwise to lock it. There is one that allows you to remove the key.

[0003]

However, in the case of unlocking by rotating in the clockwise direction as described above, it was necessary to return to the key insertion / extraction position and remove the key. The present invention has been made in view of the above prior art, and an object of the present invention is to provide a cylinder lock in which a key is automatically returned to an insertion / removal position in the case of an unlocking operation.

[0004]

A cylinder lock of the present invention for achieving the above object is provided with a torsion spring for automatic return at a rear end portion of a rotor case in which a rotor which is rotated by a key operation is mounted. Then, the locking ends at both ends of the torsion spring are respectively locked to the rotor case so that they can be engaged with the rotating rotor, and a return spring force is applied to the rotating rotor by unlocking the key. When the key is actuated to automatically return to the key insertion / removal position and is further rotated in the opposite direction to the above-mentioned rotation, the cut-off portion formed on the rotor prevents the engagement with the other of the locking ends. Characterize.

[0005]

According to the cylinder lock having the above structure, when the rotor is rotated by the key operation to unlock the rotor, the locking end of the torsion spring for automatic return is engaged with the rotor to rotate the rotor. Since it moves, the spring returns to the rotor and the key automatically returns to the insertion / removal position. When it is rotated in the opposite direction, the cut-off portion formed on the rotor does not engage with the locking end of the torsion spring, so that it does not automatically return. In the case of unlocking operation as described above, the key automatically returns to the insertion / extraction position,
The returning operation to the insertion / removal position by the operator is not always necessary.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a front view of a cylinder lock 1 of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is a rear view of the same, and FIG. 4 is an explanatory view showing the action of a rotor 6 and a torsion spring 8 for automatic return. is there. A case cover 3 is attached to the front end surface of the rotor case 2. The case cover 3 has a key insertion / removal opening 5 provided with a shutter.

A rotor 6 is rotatably mounted in the rotor case 2. A moderation mechanism 7 is formed between the rotor case 2 and the rotor 6, and moderation is provided at a lock position (A) and an unlock position (B), which are key insertion / removal positions, as shown in FIG. There is. Lock position (A)
Is a position rotated 90 degrees counterclockwise from the unlock position (B). Further, an unlock position (C) is provided at a position which is rotated 60 degrees clockwise from the unlock position (B). A torsion spring 8 for automatic return is wound around the outer periphery of the rear end of the rotor case 2. The locking ends 9 and 10 at both ends of the torsion spring 8 are bent toward the center and are locked to the ends 12 and 13 of the notch 11 of the rear end cylindrical portion 2 a of the rotor case 2. Between the ends 12 and 13 of the notch 11 is 65 at the central angle.
~ 70 degrees open.

At the rear end of the rotor 6, the rear end cylindrical portion 2a is formed.
A quarter circular shaft portion 14 is formed by cutting off three quarters of the shaft portion inside. Then, the quarter circle shaft portion 1
4, engaging projections 15 and 16 are formed on the circumferential portion. The tips of both engaging protrusions 15 and 16 are 180 degrees at the center angle.
They are open and face each other in the radial direction. In the unlocked position (B), the engagement projection 15 is engaged with the locking end 9 of the torsion spring 8 (see FIG. 3).

The cylinder lock 1 having the above-described structure is engaged with the engaging projection 15 when the key is rotated to rotate from the unlock position (B) to the unlock position (C) as shown in FIG. 4 (a). Toe 9
The torsion spring 8 that engages is wound. Therefore, the rotor 6
The elastic force of the return spring of the torsion spring 8 acts on the to automatically return to the unlocked position (B). In addition, the unlock position (B)
4A to the lock position (A), the engaging projection 16 does not engage the locking end 10 of the torsion spring 8 as shown in FIG. 4B, so that the spring elasticity of the torsion spring 8 does not act. Therefore, there is no automatic return.

As described above, the cylinder lock 1 of the present invention
In the case of rotating from the unlocked position (B), which is frequently used, to the unlocked position (C), the elastic force of the torsion spring 8 for automatic return is applied to automatically return. Also, from the unlock position (B) to the lock position (A)
When it is turned to, the mode is provided to ensure the locking and the automatic return is not provided. Therefore,
It can also be used to lock and unlock the door lock mechanism of passenger cars and to lock and unlock the lock mechanism of the trunk lid.

[Brief description of the drawings]

FIG. 1 is a front view of a cylinder lock 1.

FIG. 2 is a sectional view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is an explanatory diagram showing the operation of a rotor 6 and a torsion spring 8 for automatic return.

[Explanation of symbols]

 1 ... Cylinder lock 2 ... Rotor case 2a ... Rear end cylinder part 6 ... Rotor 8 ... Torsion spring 9, 10 ... Locking end 11 ... Notch 14 ... 4 One-half circle shaft part 15, 16 ... Engagement protrusion

Claims (1)

[Claims] 1. A torsion spring for automatic return is attached to a rear end portion of a rotor case in which a rotor rotated by a key operation is mounted, and locking ends of both ends of the torsion spring are engaged with the rotor case, respectively. When the key is unlocked, it can be engaged with the rotating rotor, and when the key is unlocked, a return spring force is applied to the rotating rotor to automatically return to the key insertion / removal position. Cylinder lock characterized in that when it is rotated in the reverse direction, the cut-off portion formed in the rotor does not engage with the other of the locking ends.