JP2904692B2 - Freewheel cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freewheel cylinder lock used for a door lock device.

[0002]

2. Description of the Related Art In general, a cylinder lock is used in a door locking device. The cylinder lock includes a cylinder and a rotor provided in the cylinder. The rotor can be rotated in the cylinder by inserting a correct key (match key). When no key is inserted into the rotor, or when another key (unmatched key), a tool, or the like is inserted into the rotor, the tumbler protruding from the rotor engages with the engagement receiving portion formed on the inner peripheral surface of the cylinder. So that the rotor cannot be rotated. A key lever is connected to the rear end of the rotor,
The door lock device is driven via a rod connected to the key lever.

[0003]

However, in the conventional cylinder lock, if a tumbler is broken by inserting an unmatched key or a tool into the rotor and applying a large load, the rotor is allowed to rotate, and the door lock is locked. As a result of the state being released, there is a problem that the vehicle is apt to be stolen. The present invention has been made in view of the above problems, and has as its object to provide a freewheel cylinder lock excellent in antitheft property.

[0004]

According to the present invention, in order to achieve the above object, a cylinder lock is provided on a cylinder attached to an outer plate of a door body, and a relief recess is provided on a side face of a rotary shaft protruding from a rear end face. A rotor that rotates within the cylinder by inserting a matching key so that the tumbler is immersed in the cylinder,
A sleeve which is externally mounted on the rotor and has a through hole in which an engaging hole for engaging and disengaging the tumbler and a ball for engaging and disengaging in the escape recess are movably located; When rotated, the ball is pressed against the outer peripheral surface of the rotor and is positioned from the relief recess of the rotor to the ball receiving portion provided on the inner peripheral surface through the through hole of the sleeve, and is integrated with the rotor and the sleeve by key operation. And a rear rotor that rotates.

[0005]

According to the above construction, when a key is inserted into the rotor, the tumbler is immersed in the rotor, and the key is rotated by a predetermined angle with respect to the sleeve. This allows
The ball disposed in the through hole of the sleeve is pressed by the outer peripheral surface of the rotating shaft portion of the rear rotor and protrudes to the outer peripheral side,
As a result of being located on the ball receiving portion provided on the inner peripheral surface of the rear rotor, the rotor and the rear rotor rotate integrally in the cylinder.

[0006]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a freewheel cylinder lock. Generally, this cylinder lock is an outer plate 1 of a door body.
Alternatively, a cylinder 2 attached to a concave portion formed in an outer handle provided on an outer plate 1, a rotor 3 rotatably housed in the cylinder 2, and an exterior provided on the rotor 3, which rotates in the cylinder 2 together with the rotor 3. Door 4 and a door lock device (not shown) attached to the rear end of the rotor 3 via a lever and a rod (not shown).
And a rear rotor 5 for driving the motor.

The cylinder 2 has a substantially cylindrical shape, and is accommodated in a recess formed in the outer plate 1 of the door body or a recess formed in the outer handle attached to the outer plate 1, and has a locking claw 2a formed in the outer peripheral portion. It is attached by locking the elastic locking member via a notch formed in the concave portion. A rotor cover 6 having a vertically long key insertion hole 6a is attached to the outside opening of the door body from inside. The key insertion hole 6 a is releasably closed by a closing plate 8 urged by a spring 7. The cylinder 2 has a through hole 9 formed in the side wall near the outer opening of the door body, and a cutout 10 formed in a part of the inner opening edge. The notch 10 is provided with a locking receiving portion 10a which locks both ends of a coil spring 32 described later to prevent the rear rotor 5 from dropping off.

As shown in FIG. 4, the rotor 3 has a substantially cylindrical shape, and has a key insertion hole 12 (see FIG. 2) for inserting the key 11 from the end face of the large-diameter portion 13 on one end. On the outer peripheral portion of the large diameter portion 13, pressing portions 13a and 13b for pressing a pressing receiving portion 30 of the sleeve 4 described later to rotate the sleeve 4 are formed, and in the vicinity of one pressing portion 13a. At the neutral position of the rotor 3, a through hole 14 communicating with the through hole 9 of the cylinder 2 is formed.
The through hole 14 allows the sensor light to pass therethrough and is used for detecting the rotational position of the rotor 3. In addition, a tumbler holding hole 16 is formed in the side wall of the rotor 3 to insert the tumblers 15 alternately from opposite sides and slidably hold the tumblers. A part of the tumbler holding hole 16 is pressed against the spring receiving portion 22 of the tumbler 15 to
A spring accommodating portion 16a for accommodating a spring 15a for urging the rotor 5 in the outer peripheral direction of the rotor 3 is formed. Further, a rotating shaft portion 17 protrudes from the rear end of the rotor 3, and a ball escape recess 18 is provided at a symmetrical position on the outer peripheral surface thereof.
Are formed.

[0009] As shown in FIG.
A key insertion hole 19 through which the key 11 is inserted in the center
The key insertion hole 19 is provided with a projection 20 at a predetermined position on the inner edge thereof. At the end of the tumbler 15, a substantially V-shaped engaging protrusion 21 is provided, and a spring receiving portion 22 is formed at a side edge near the engaging protrusion 21 to protrude.

As shown in FIG. 9, the key 11 has a shape in which a key groove 23 is formed so as to meander on one side of a plate-like body. It is a letter-shaped portion 24. Accordingly, even if the protrusions 20 formed in the key insertion holes 19 of the tumblers 15 located in the rotor 3 are not on the same straight line, the protrusions 20 are guided by the C-shaped portions 24 and reliably introduced into the key grooves 23. It is possible.

As shown in FIG. 6, the sleeve 4 has a substantially cylindrical shape, a small-diameter cylindrical portion 25 is formed on one end side, and a ball holding hole 26 is formed on the side wall of the sleeve 4 so as to face each other. . An engagement recess 27 is formed on the outer surface of the rear end wall from which the small-diameter cylindrical portion 25 projects, and a ball receiving recess 28 (see FIG. 2) is formed on the inner surface. The ball 28b urged by a spring 28a is engaged with and disengaged from the ball receiving recess 28. Also, two rows of engagement elongated holes 29 (one pair is not shown) are formed in the side wall of the sleeve 4 so as to face each other in the axial direction. Fifteen engagement projections 21 are adapted to be disengaged. Further, a pressure receiving portion 30 is extended from the other end of the sleeve 4 so as to be located between the pressing portions 13 a and 13 b formed on the rotor 3.

The rear rotor 5 is, as shown in FIG.
A lever (not shown) is connected to the center of the end face in a cup shape that engages outside the small diameter cylindrical portion 25 of the sleeve 4. This lever is for connecting a rod for driving the door lock device. A relief hole 31 is formed in the side wall of the rear rotor 5 along the circumferential direction, and both ends of the coil spring 32 housed protrude, and a spring 33 is provided on the side opposite to the relief hole 31 (see FIG. 1). 7, a positioning member 34 urged to the right in FIG. 7 is slidably provided. Further, the sleeve 4 is provided on the inner peripheral surface on the opening side of the rear rotor 5.
A ball receiving portion 36 is formed for engaging and disengaging a ball 35 provided in a ball holding hole 26 formed in the small diameter cylindrical portion 25 of FIG.

The above components are assembled as follows. First, from the state shown in FIG. 3A, the sleeve 4 is provided on the outer peripheral portion of the rotor 3 so as to be in the state shown in FIG. In this case, if the key 11 is inserted into the key insertion hole 12 of the rotor 3 and the tumbler 15 is immersed in the rotor 3 by the key groove 23 and the projection 20, the exterior of the sleeve 4 to the rotor 3 can be easily performed. Of course, after the exterior, the key 11 is removed, and the engaging projection 21 of the tumbler 15 is
To be engaged.

Next, the rear rotor 5 is attached to the rotating shaft portion 17 of the rotor 3, and the state shown in FIG. At this time, the ball 35 is disposed in the ball holding hole 26 of the small-diameter cylindrical portion 25. In the state shown in FIG. 3B, the ball holding hole 26, the ball escape recess 18 and the ball receiving portion 36 are connected. The balls 35 coincide with each other, and the ball 35 is movable in the radial direction.

Subsequently, as shown in FIG. 3D, each of the above members is housed in the cylinder 2 and both ends of the coil spring 32 are locked by locking receiving portions 10a formed in the cylinder 2. , From falling off the cylinder 2.

As shown in FIG. 3 (d), the door can be locked or unlocked by operating the key 11 inserted into the rotor 3 from the side as shown in FIG. 3 (d).

That is, when the key 11 is inserted into the rotor 3, the protrusion 20 formed on the inner edge of the key insertion hole 19 of the tumbler 15 is guided by the C-shaped portion 24 at the tip of the key groove 23, and slides in the key groove 23 sequentially. Moving. When the key 11 is completely inserted, the tumbler 15 is completely immersed in the rotor 3, and the sleeve 4 is rotatable with respect to the rotor 3.

When the key 11 is rotated, the pressing portion 13a or 13b of the rotor 3 is
Until contact with zero, only the rotor 3 rotates and the ball escape concave portion 18 moves, so that the outer peripheral surface of the rotary shaft portion 17 is located in the ball holding hole 26 of the sleeve 4. For this reason, the ball 35 in the ball holding hole 26 protrudes to the outer peripheral side, and the ball receiving portion 36 of the rear rotor 5
, That is, the rotor 3 and the rear rotor 5 are connected to be able to rotate integrally.

Therefore, when the rotation of the rotor 3 is continued by the key operation, the pressing portion 13a or 13b of the rotor 3 presses the pressing receiving portion 30 of the sleeve 4, so that the rotor 3, 3
The sleeve 4 and the rear rotor 5 rotate integrally. Then, the door lock device is driven via a lever and a rod (not shown). In other words, the door can be locked or unlocked by rotating the key 11 forward and backward.

When a driver or the like without the key groove 23 is to be inserted into the rotor 3, the protrusion 20 formed on the inner edge of the key insertion hole 19 of the tumbler 15 prevents the entry. When a key (unmatched key) other than the match key having the key groove 23 is inserted into the rotor 3, the tumbler 15 does not completely enter the rotor 3, and the rotor 3 and the sleeve 4 rotate integrally. To maintain.

Therefore, the ball escape concave portion 18 of the rotor 3 does not move from the ball holding hole 26 of the sleeve 4 and the ball 35 does not engage with the ball receiving portion 36 of the rear rotor 5. Depending on the operation, only the rotor 3 and the sleeve 4 rotate, the rear rotor 5 does not rotate, and the door lock device is not driven. Since the rotor 3 is rotated without rotating the rear rotor 5 in this manner, there is no problem that the tumbler 15 is broken and the door lock state is released.

[0022]

As is clear from the above description, according to the freewheel cylinder lock of the present invention, only the rotor and the sleeve are rotated by an operation other than the match key, so that the rear rotor rotates. Therefore, the door lock device is not driven. As a result, as before,
If the tumbler is destroyed, there is no problem that the door lock state can be released, and the anti-theft effect is extremely excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a freewheel cylinder lock according to the present embodiment.

FIG. 2 is a cross-sectional view after the assembly of FIG. 1;

FIG. 3 is a perspective view showing an assembling procedure of FIG. 1;

FIG. 4 is a perspective view of the rotor of FIG. 1;

FIG. 5 is a front view of the tumbler of FIG. 1;

FIG. 6 is a perspective view of the sleeve of FIG. 1;

FIG. 7 is a perspective view of the rear rotor of FIG. 1;

FIG. 8 is a perspective view of the positioning member of FIG.

FIG. 9 is a front view of the key of FIG. 3;

[Explanation of symbols]

2 ... Cylinder, 3 ... Rotor, 4 ... Sleeve, 5 ... Rear rotor, 11 ... Key, 15 ... Tumbler, 18 ... Ball relief recess, 26 ... Ball holding hole, 35 ... Ball, 36
... Ball receiving part.

Claims (1)

(57) [Claims] 1. A cylinder mounted on an outer plate of a door body, and a relief recess on a side surface of a rotating shaft protruding from a rear end surface, and a tumbler is immersed by inserting a matching key to rotate in the cylinder. A sleeve provided on the rotor and having a through hole in which an engaging hole for engaging and disengaging the tumbler and a ball for engaging and disengaging the relief recess are movably located; a matching key attached to the sleeve; When only the rotor is rotated, the ball is pressed against the outer peripheral surface of the rotor and is positioned from the relief recess of the rotor to the ball receiving portion provided on the inner peripheral surface through the through hole of the sleeve, and the rotor is operated by key operation. A freewheel type cylinder lock comprising a sleeve and a rear rotor which rotates integrally.