JPH06158918A - Cylinder lock - Google Patents

Abstract

PURPOSE:To prevent the fitting part of a tumbler key or the tops of key wave from abrading. CONSTITUTION:A key rotor 5 is pushed into a cylinder body 1 to manipulate a key 1. A rotor can 14 regulating the transfer of tumblers 9, 10 is provided lest the tops 7a of key wave should fit to the fitting parts 9e, 10e of the tumblers 9, 10 when the key is inserted into the keyhole 6, in the condition that the key rotor 5 is not inserted in the cylinder body 1. The key 7 is inserted in the keyhole 6 by the recessions 16a, 17a provided on the rotor can 14 and also the transfer of the tumblers 9, 10 is allowed to force the key tops 7a to fit to the fitting parts 9e, 10e.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock in which a key rotor is rotatably provided in a cylinder body.

[0002]

2. Description of the Related Art In a cylinder lock of this type, a tumbler is movably provided in a tumbler insertion hole of a key rotor,
When the key is not inserted into the key insertion hole of the key rotor, the engagement end of the tumbler is engaged with the locking engagement hole of the cylinder body to prevent the key rotor from rotating. is doing. Then, when the key is inserted into the key insertion hole of the key rotor, the key crest of the key engages with the key engaging portion provided on the tumbler, and the tumbler moves, so that the engaging end portion of the tumbler is moved. The lock engagement hole of the cylinder body is disengaged, so that the rotation of the key rotor is allowed.

[0003]

However, in the above conventional structure, when the key is inserted into the key insertion hole of the key rotor, the tumbler moves while the key engaging portion of the tumbler engages with the key crest of the key. With this configuration, the key engaging portion of the tumbler and the key crest of the key rub against each other. For this reason, when such a cylinder lock is used for a long period of time, there is a drawback that the key engaging portion of the tumbler is worn or the key crest of the key is worn and the life of the cylinder lock is shortened. In addition, when the key is inserted into the key insertion hole of the key rotor, the key engagement portion of the tumbler and the key crest of the key rub against each other, so that the operation feeling when inserting the key is not so good. there were.

Further, when the key engaging portion of the tumbler is worn or the key crest of the key is worn as described above, there is a problem that unlocking is likely to occur due to fraudulent acts such as so-called picking. Further, in the above-mentioned conventional configuration, since the tumbler can be directly moved and operated from the key insertion hole of the key rotor, there is also a drawback that an illegal act such as picking is easily performed.

Therefore, an object of the present invention is to provide a cylinder lock which can prevent the key engaging portion of the tumbler from being worn and the key crest of the key to be worn.

[0006]

The cylinder lock of the present invention comprises:
In the state in which the cylinder body, the key rotor rotatably provided in the cylinder body, and the key movably provided in the tumbler insertion hole of the key rotor are not inserted into the key insertion holes of the key rotor, A tumbler for preventing rotation of the key rotor by engaging an engaging end portion with a locking engagement hole of the cylinder body, and the key provided on the tumbler and inserted into the key insertion hole. A cylinder lock comprising a key engaging portion that moves the tumbler so as to release the engagement between the engaging end portion and the locking engaging hole by engaging with the key crest of the key. The key rotor is provided in the cylinder body such that the key rotor can be pushed, and the key rotor is not pushed into the cylinder body. Includes a tumbler movement restricting member that restricts movement of the tumbler so that the key crest of the key and the key engaging portion of the tumbler do not engage when the key is inserted into the key insertion hole. Along with this, the tumbler movement restricting member is provided, and when the key is inserted into the key insertion hole and the key rotor is pushed into the cylinder body, the key crest of the key and the key engagement of the tumbler are engaged. It is characterized in that it is provided with a movement permitting portion for permitting the movement of the tumbler so as to engage with the portion.

[0007]

According to the above means, when the key is inserted into the key insertion hole of the key rotor, the key rotor is not pushed into the cylinder body, so that the tumbler movement restricting member restricts the movement of the tumbler. There is. For this reason, even if the key is inserted into the key insertion hole, the key crest of the key and the key engaging part of the tumbler do not engage with each other, that is, they do not contact each other, and the key engaging part of the tumbler wears. , The key of the key is not worn.

Then, after inserting the key into the key insertion hole and further pressing the key, the key rotor is pushed into the cylinder body. As a result, the movement permitting portion provided on the tumbler movement restricting member allows the movement of the tumbler, so that the key crests of the keys and the key engaging portions of the tumbler engage with each other, and The engagement between the engagement end portion and the locking engagement hole of the cylinder body is released, and the key rotor becomes rotatable.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1 showing the overall structure of a cylinder lock, a cylinder body 1 has a substantially cylindrical shape, and a rotor insertion hole 2 is formed inside. Locking engagement holes 3 and 4 are provided on the inner peripheral surface of the cylinder body 1 at positions substantially opposite to each other with the axis of the cylinder body interposed therebetween (see FIGS. 3 and 4). As shown in FIG. 1, a plurality of lock engagement holes 3 and 4 are provided along the axial direction.

A key rotor 5 is provided in the rotor insertion hole 2 of the cylinder body 1 so as to be rotatable and axially movable (left and right in FIG. 1). This key rotor 5
Is provided with a key insertion hole 6 so as to extend along the axial direction, and a key 7 can be inserted into the key insertion hole 6 and operated. As shown in FIG. 2, the key rotor 5 is also provided with a slit-shaped tumbler insertion hole 8 that intersects the key insertion hole 6 at a right angle and is in a communicating state. In this case (in this embodiment), eight tumbler insertion holes 8 are provided side by side along the axial direction.

In each of these eight tumbler insertion holes 8, four first tumblers 9 and two second tumblers 10 are arranged movably every other one. The first tumbler 9 is in the shape of a thin plate, and has engagement ends 9 engaging with the locking engagement holes 3 and 4 of the cylinder body 1 at the upper and lower ends in FIG.
a and 9b are formed, a key insertion hole 9c into which the key 7 is inserted is formed in the central portion, and an engaging convex portion 9d is formed in the central portion on the left end in FIG.

The key insertion hole 9c of the first tumbler 9 is provided with a key engagement portion 9e with which the key crest 7a (see FIG. 1) engages when the key 7 is inserted. When the first tumbler 9 is arranged in the tumbler insertion hole 8, the first tumbler 9 is moved by the spring force of the coil spring 11 provided in the spring accommodating portion of the key rotor 5 as shown in FIG.
It is urged to move downwards.

In the same manner, the second tumbler 10 is also provided.
Has a thin plate shape, and engaging ends 10a and 10 engaging with the locking engaging holes 3 and 4 of the cylinder body 1 at upper and lower ends in FIG.
b is formed, and a key insertion hole 10c into which the key 7 is inserted is formed in the central portion, and the engaging convex portion 10 is formed in the central portion on the right end in FIG.
d is formed. When the key 7 is inserted into the key insertion hole 10c of the second tumbler 10, the key crest 7
A key engaging portion 10e with which a (see FIG. 1) is engaged is provided. The second tumbler 10 has a tumbler insertion hole 8
As shown in FIG. 4, the coil spring 11 provided inside the spring accommodating portion of the key rotor 5 is urged to move downward in FIG.

Now, as shown in FIGS. 2, 3 and 4, two concave portions 12 and 1 are provided on the outer peripheral portion of the key rotor 5.
3 is provided so as to extend along the axial direction. As shown in FIGS. 3 and 4, one of the two recesses 12 and 13 is provided on the lower left side of the tumbler insertion hole 8 and the other recess 13 is provided on the upper right side of the tumbler insertion hole 8. Has been.

On the other hand, in the rotor insertion hole 2 of the cylinder body 1, for example, a rotor cam 1 which is a tumbler movement restricting member.
4 is rotatably provided. This rotor cam 14
Is a base 15 having a substantially cylindrical shape, as shown in FIG.
The base portion 15 is composed of a pair of cam portions 16 and 17 which are provided to extend leftward at substantially symmetrical positions with respect to the axial center line at the left end portion in FIG.

The pair of cam portions 16 and 17 are fitted in the recesses 12 and 13 of the key rotor 5 with the key rotor 5 and the rotor cam 14 inserted and fitted in the rotor insertion hole 2 of the cylinder body 1. (See FIGS. 3 and 5).

Then, as shown in FIG. 1, the key rotor 5 and the rotor cam 1 are inserted into the rotor insertion hole 2 of the cylinder body 1.
4 is inserted and fitted, the shaft portion 18 protruding rightward from the right end portion 5a in FIG. 1 of the key rotor 5 has a through hole 15 formed in the right end wall portion of the base portion 15 of the rotor cam 14.
a and a through hole 1 provided in the right end wall portion of the cylinder body 1.
It passes through a and projects to the outside. The right end portion 5 a of the key rotor 5 in FIG. 1 is a base portion 15 of the rotor cam 14.
Is fitted to the inner peripheral part of the.

Further, the right end portion 5a of the key rotor 5 in FIG.
A coil spring 19 is provided between the end surface of the rotor cam 14 and the right end wall of the base 15 of the rotor cam 14. The spring force of the coil spring 19 urges the key rotor 5 to move leftward in FIG. Then, the shaft portion 18 of the key rotor 5
A stopper 20 is attached to a portion of the key rotor 5 that protrudes to the outside so that the key rotor 5 is prevented from coming off.
In this case, if the key 7 is inserted into the key insertion hole 6 of the key rotor 5 and then further pressed, the key rotor 5 can be pressed against the spring force of the coil spring 19, that is, moved to the right in FIG. It is possible.

Here, the cam portions 16 and 17 of the rotor cam 14 are provided with four concave portions 16a and 17b, respectively. These recesses 16a and 17b form a movement permitting portion. In the case of this configuration, in the state where the key rotor 5 is not pushed in (at the position shown in FIG. 1), the tumbler 9 has the engagement projection 9d whose lower end has the cam portion 16 of the rotor cam 14 as shown in FIG. Abutting against the upper surface portion 16b of the tumbler 9 at this time.
a is engaged with the lock engagement hole 3 of the cylinder body 1.

In this state, the tumbler 10 is
As shown in FIG. 4, the upper end of the engaging convex portion 10d is in contact with the lower surface portion 17b of the cam portion 17 of the rotor cam 14, and at this time, the lower engaging end portion 10b of the tumbler 10 locks the cylinder body 1. It engages with the engaging hole 4 for use.

On the other hand, when the key rotor 5 is pushed in, the lower end of the engaging protrusion 9d of the tumbler 9 is the rotor cam 14.
The tumbler 9 is allowed to move downward by the spring force of the coil spring 11 because it can enter the concave portion 16a of the cam portion 16 of the key portion 7 of the key 7 and the key engaging portion of the tumbler 9. It is configured to be able to engage with 9e. Then, in the tumbler 10, the upper end of the engaging convex portion 10 d is the concave portion 1 of the cam portion 17 of the rotor cam 14.
Since it becomes possible to enter the inside of the tumbler 7a, the tumbler 10 is allowed to move upward by the spring force of the coil spring 11, and the key crest 7a of the key 7 and the key engaging portion 10e of the tumbler 10 are engaged with each other. Is configured to be possible.

Next, the operation of the above configuration will be described. First,
When the key 7 is not inserted into the key insertion hole 6 of the key rotor 5, the key rotor 5 is not pushed into the cylinder body 1 and is located at the position shown in FIG. 1 by the spring force of the coil spring 19. ing. In this position, the tumbler 9
As shown in FIG. 3, the lower end of the engaging protrusion 9d is the rotor cam 1
By contacting the upper surface portion 16b of the cam portion 16 of No. 4,
The upper engaging end 9a of the tumbler 9 is engaged with the lock engaging hole 3 of the cylinder body 1.

At the same time, as shown in FIG. 4, in the tumbler 10, the upper end of the engaging convex portion 10d abuts the lower surface portion 17b of the cam portion 17 of the rotor cam 14, so that the lower engaging end portion of the tumbler 10 is engaged. 10 b is engaged with the locking engagement hole 4 of the cylinder body 1. As a result, the key rotor 5
Is prevented from rotating.

In such a state, the key 7 is replaced by the key rotor 5
3 and 4, the tumblers 9 and 10 are restricted in movement by the cam portions 16 and 17 of the rotor cam 14, so that the key 7 is inserted into the key insertion hole 6 of the rotor cam 14. The key crest 7a of the key 7 and the key engaging portions 9e and 10e of the tumblers 9 and 10 do not engage with each other when being inserted into the inside. That is, as shown in FIGS. 1, 3 and 4,
The key 7 is a key insertion hole 9c, 10c of the tumbler 9, 10.
It is inserted without touching inside.

Therefore, since the key 7 does not rub against the key engaging portions 9e and 10e of the tumblers 9 and 10, the key engaging portions 9e and 10e of the tumblers 9 and 10 are worn and the key crests 7a of the key 7 are worn. Will not wear out.

When the key 7 is further pushed after inserting the key 7 into the key insertion hole 6 of the key rotor 5, the key rotor 5 resists the spring force of the coil spring 19 and the cylinder body 1 is pressed.
It is pushed inside. Thereby, the engaging protrusion 9 of the tumbler 9
The lower end of d comes into the recess 16a of the cam portion 16 of the rotor cam 14, and the tumbler 9 is moved downward by the spring force of the coil spring 11. At the same time, tumbler 1
The upper end of the engaging convex portion 10d of 0 is the cam portion 1 of the rotor cam 14.
7, the tumbler 10 is moved upward by the spring force of the coil spring 11.

As a result, the key crests 7a of the key 7 and the key engaging portions 9e, 10e of the tumblers 9, 10 are engaged and coincide with each other, so that the engaging ends 9a, 9b of the tumblers 9, 10 are
10a, 10b and the locking engagement hole 3 of the cylinder body 1,
The engagement with 4 is released, the key rotor 5 becomes rotatable, and thus unlocked.

According to this embodiment having such a structure, when the key 7 is inserted into the key insertion hole 6 of the key rotor 5, the cam portions 16 and 17 of the rotor cam 14 restrict the movement of the tumblers 9 and 10. Therefore, when the key 7 is inserted into the key insertion hole 6, the key crest 7a of the key 7 and the key engaging portions 9e, 10e of the tumblers 9, 10 do not come into contact with each other. Therefore, unlike the conventional configuration, the tumblers 9, 10
Since the key engaging portions 9e, 10e of the key and the key crest 7a of the key 7 do not rub each other, even if such a cylinder lock is used for a long time, the key engaging portions 9 of the tumblers 9, 10
It is possible to surely prevent the life from being shortened due to wear of e and 10e and wear of the key crest 7a of the key 7.

When the key 7 is inserted into the key insertion hole 6 of the key rotor 5, the key engagement portion 9 of the tumblers 9 and 10 is inserted.
Since e and 10e and the key crests 7a of the key 7 do not rub against each other, the operation feeling at the time of inserting the key 7 is improved. Further, in the present embodiment, unless the key rotor 5 is pushed in, the tumblers 9 and 10 are restricted in movement by the cam portions 16 and 17 of the rotor cam 14, and the tumblers 9 and 10 are inserted from the key insertion holes 6 of the key rotor 5. Since it is a structure that cannot be directly moved, the preventive effect against illegal activities such as so-called picking becomes very high.

[0030]

As is apparent from the above description, the present invention provides the key rotor so that it can be pushed into the cylinder body, and when the key rotor is not pushed into the cylinder body, the key is inserted into the key rotor. A tumbler movement restricting member that restricts the movement of the tumbler is provided inside the cylinder body so that the key crest of the key and the key engaging portion of the tumbler do not engage when inserted into the hole. A movement permitting part that allows the tumbler to move so that the key crest of the key and the key engaging part of the tumbler engage when the key is inserted into the key insertion hole and the key rotor is pushed into the cylinder body. Since it is configured to provide
This has an excellent effect that it is possible to prevent the key engaging portion of the tumbler from being worn and the key crest of the key to be worn.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a cylinder lock showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a key rotor, a tumbler, and a rotor cam.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

[Explanation of reference numerals] 1 is a cylinder body, 2 is a rotor insertion hole, 3 and 4 are locking engagement holes, 5 is a key rotor, 6 is a key insertion hole, 7 is a key, 7a is a key mountain, and 8 is a tumbler insertion Hole, 9 is a first tumbler, 9a and 9b are engaging end portions, 9c is a key insertion hole, 9
d is an engaging convex portion, 9e is a key engaging portion, 10 is a second tumbler, 10a and 10b are engaging end portions, 10c is a key insertion hole,
10d is an engaging convex portion, 10e is a key engaging portion, 11 is a coil spring, 12 and 13 are concave portions, 14 is a rotor cam (tumbler movement restricting member), 16 and 17 are cam portions, and 16a and 17b.
Indicates a concave portion (movable permitting portion), and 19 indicates a coil spring.

Claims (1)

[Claims] 1. A cylinder body, a key rotor rotatably provided in the cylinder body, a key movably provided in a tumbler insertion hole of the key rotor, and a key inserted into a key insertion hole of the key rotor. A tumbler for preventing rotation of the key rotor by engaging the engagement end portion with the lock engagement hole of the cylinder body in a state where it is not covered;
Disengagement of the engagement end portion and the locking engagement hole by engaging with the key crest of the key when the key is provided in the tumbler and is inserted into the key insertion hole A cylinder lock provided with a key engaging portion for moving the tumbler so as to allow the key rotor to be pushed into the cylinder body, the key rotor being provided in the cylinder body, and the key rotor being in the cylinder body. When the key is not pushed in, the movement of the tumbler is restricted so that the key crest of the key and the key engaging portion of the tumbler do not engage when the key is inserted into the key insertion hole. And a tumbler movement restricting member that is provided on the tumbler movement restricting member, in which the key is inserted into the key insertion hole and the key rotor is pressed into the cylinder body. , The cylinder lock, characterized in that the key engagement portion of the key mountain with the tumblers of the key and a movement permitting portion for permitting movement of the tumbler so as to engage.