JPH102134A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock equipped with both mechanisms of click mechanism and inside cylinder extracting mechanism with a simple constitution and, at the same time, equipped with a mechanism capable of exchanging an inside cylinder by means of an inside cylinder exchange key which only coincides with a key code of the cylinder lock. SOLUTION: A cylinder lock is equipped with an outside cylinder 2, an inside cylinder 3 provided to the outside cylinder 2 in a turnable and slidable manner and a key-hole 10a extended in the direction of the axis of the inside cylinder 3, a projection 8a is provided to the front end thereof, and a rising and falling plate 8 urged with a coil spring 5 so as to project to a locking groove formed in the outside cylinder 2 is provided. A click mechanism is formed by interlocking the projection 8a of the rising and falling plate 8 with a click recess section formed in the outside cylinder 2 by the turning of the outside cylinder 2. The interlock of the locking groove of the outside cylinder 2 is released by insertion of an inside cylinder exchange key 40 having an exchangeable key code of the inside cylinder 3, the cylinder lock is slid inside a loose recess section formed in the outside cylinder 2, and it can be pulled out from the outside cylinder 2 of the inside cylinder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cylinder lock, and more particularly to a cylinder lock having a click mechanism and an inner cylinder changing mechanism.

[0002]

2. Description of the Related Art Conventionally, there is a cylinder lock provided with a click mechanism in order to improve operability when locking and unlocking the lock.

Further, in the case where the key is lost or the resident of an apartment or the like is replaced, the inner cylinder of the cylinder lock can be exchanged, as disclosed in JP-A-3-147988 and JP-A-6-58074. No. 6,086,045.

[0004]

However, a cylinder lock having a click mechanism and a cylinder lock having an inner cylinder replacing mechanism have been expensive since the number of parts is increased and the structure is complicated. In addition, a cylinder lock having an inner cylinder exchange mechanism that takes operability into consideration has not been proposed so far. A cylinder lock having a conventional inner cylinder exchange mechanism can be exchanged for an inner cylinder by operating an inner cylinder exchange tumbler, which has a problem in antitheft property.

The present invention has been made in view of the above problems, and provides a cylinder lock having a click mechanism capable of replacing the inner cylinder without increasing the number of parts, improving the anti-theft property, and further improving the operability. The purpose is to:

[0006]

According to the first aspect of the present invention,
A cylinder lock comprising an outer cylinder, an inner cylinder pivotally and slidably mounted on the outer cylinder, and a key lock extending in the axial direction of the inner cylinder, wherein the cylinder lock has a projection at the tip. An elevating plate urged by a coil spring so as to protrude into a locking groove formed in the outer cylinder, and a projection of the elevating plate is formed on the outer cylinder by the rotation of the inner cylinder. A click mechanism is formed by engaging the click recess, and the engagement of the locking groove of the outer cylinder is released by insertion of an inner cylinder replacement key having a key code capable of replacing the inner cylinder. It is characterized in that the inner cylinder is slid in the recessed recess formed in the outer cylinder so that the inner cylinder can be removed from the outer cylinder.

According to the first aspect of the present invention, the projection formed on the single lifting plate is engaged with the click recess formed on the outer cylinder when the locking / unlocking key is used, thereby exhibiting a click function. When the inner cylinder replacement key is used, the engagement of the locking groove of the outer cylinder is disengaged, the inner cylinder is slid in the recess formed in the outer cylinder, and the inner cylinder can be removed from the outer cylinder. Only when the inner cylinder replacement key matches the key code with the cylinder lock, the engagement between the plate tumbler and the locking projection of the outer cylinder is released to allow the inner cylinder to be pulled out. The inner cylinder can be shared with the inner cylinder exchange mechanism, and the inner cylinder can be exchanged only by the inner cylinder exchange key that matches the key code of the cylinder lock.

[0008]

Next, a specific example of an embodiment of a cylinder lock according to the present invention will be described with reference to the drawings. As shown in FIG. 1, a cylinder lock 1 according to the present invention includes an outer cylinder 2, an inner cylinder 3, and a plate tumbler which is mounted via a coil spring 5 in a tumbler hole 4 formed in the inner cylinder 3. 6 and an elevating plate 8.

As shown in FIGS. 1 and 2, the outer cylinder 2 is formed in a substantially cylindrical shape, and the insertion port 2 into which the inner cylinder 3 is inserted.
a, a projection 2b projecting from the door surface when the cylinder lock 1 is attached to a door or the like (not shown), and an insertion portion 2d inserted into an attachment portion of the door or the like. 2c is formed.

In the insertion portion 2d, three locking projections 2m are erected, and engage with an elastic piece (not shown) provided near a mounting hole (not shown) of the cylinder lock 1 to move the cylinder lock 1 to a door or the like. Fixed to.

An engaging projection 2e is formed on the inner surface 2n of the outer cylinder 2 so as to engage with the tip 6a of the plate tumbler 6, and a rear portion of the outer cylinder 2, that is, a right end in FIG. An engagement groove 2f having a diameter slightly larger than the inner diameter D is formed. As shown in FIG. 2 (b), two click recesses 2h are formed in the locking groove 2f. Furthermore, the locking groove 2
On the bottom surface 2j of f, there is formed a recess 2k extending forward from the bottom surface 2j, having an inverted triangular cross section, and having a cross section that becomes smaller toward the front.

As shown in FIGS. 1 and 3 (a), the inner cylinder 3
, A plate tumbler 6 that matches a key code is attached to a plurality of tumbler holes 4 via a coil spring 5.
The plate tumbler 6 is urged outward by the coil spring 5. This point is the same as that of a normal plate tumbler tablet. An elevating plate 8 is attached to the rear end of the inner cylinder 3. As shown in FIG. 1, the lifting plate 8 has a projection 8a at its tip.
A contact portion 8c is formed at the other end of the central opening 8b so as to be in contact with the inner cylinder exchange key 40 and to draw the projection 8a inward. Further, one end of the coil spring 5 abuts on the urging portion 8d, and is constantly urged outward by the coil spring 5 attached inside the inner cylinder 3, as shown in FIGS. 4 (c) and 4 (d). .

As shown in FIG. 3A, a drive pin 9 is integrally formed on the rear end surface of the inner cylinder 3, and the drive pin 9 is simultaneously rotated by the rotation of the locking / unlocking key 30, and is not shown. Move the locking rod to lock and unlock. A key guide 10 is attached to the front end of the inner cylinder 3, and a key hole 10a is formed in the key guide 10 to guide the insertion of the keys 30, 40 as shown in FIG.

The locking / unlocking key 30 is a key used for normal locking / unlocking, and has a key code that matches the key code of the cylinder lock 1. On the other hand, the inner cylinder replacement key 40
Is a key used only when the inner cylinder 3 is replaced when the locking / unlocking key 30 is lost or the like. The key code corresponding to the key code of the cylinder lock 1 and the key code for operating the elevating plate 8 are Have.

As shown in FIGS. 3A and 4A,
The locking / unlocking key 30 is formed to have a slightly shorter insertion length into the inner cylinder 3 than the inner cylinder replacement key 40 and has a distal end portion 30.
a is formed at an acute angle. Therefore, the locking / unlocking key 30
Does not come into contact with the lift plate 8.

The inner cylinder exchange key 40 is a lock / unlock key 3.
The length of insertion of the coil spring 5 into the inner cylinder 3 is slightly longer than 0, and the distal end portion 40a is formed at an obtuse angle. The lifting plate 8 can be moved upward against the elastic force.

Next, the operation of the cylinder lock 1 having the above configuration will be described. First, a normal locking / unlocking operation will be described. When the locking / unlocking key 30 is inserted into the keyhole 10a, the state shown in FIG. 3 is obtained. In this state, the tip portion 30a of the locking / unlocking key 30 does not contact the contact portion 8c of the lift plate 8, and the lift plate 8 is maintained at the position before the key is inserted. Accordingly, as shown in FIG. 3 (b), the projection 8a engages with the click recess 2h formed in the locking groove 2f of the outer cylinder 2 so as to be unlocked and unlocked, as shown by hatching the lifting plate 8. Sometimes a click feeling can be obtained.

Further, in this normal use state, even if the locking / unlocking key 30 is rotated, since the elevating plate 8 is not inserted into the recess 2k, the inner cylinder 3 is pulled out from the outer cylinder 2. There is no.

Next, a procedure for replacing the inner cylinder 3 will be described. As shown in FIG. 4A, when the inner cylinder replacement key 40 is inserted through the keyhole 10a, the distal end portion 40a contacts the contact portion 8c of the elevating plate 8, and the contact portion 8c moves upward. FIG.
As shown in FIG. 2B, the projection 8a of the lifting plate 8 is separated from the locking groove 2f of the outer cylinder 2 as shown by hatching the lifting plate 8. Then, by turning the key 40, as shown in FIG.
The projection 8a is pulled out and matched with the concave portion 2k. In this state, when the key 40 is slid in the axial direction, the inner cylinder 3 is pulled out.
By inserting an inner cylinder different from the pulled-out inner cylinder 3 into the inner cylinder replacement key and performing the above operation in reverse, the replacement operation of the inner cylinder is completed. FIG. 4D is a reference view and is a view similar to FIG. 4C, but shows a state in which the protrusion 8a of the lifting plate 8 does not coincide with the recess 2k of the outer cylinder. .

Incidentally, an inner cylinder replacement key whose key code does not match the key code of the cylinder lock 1 is inserted into the inner cylinder 3 to engage the projection 8a of the elevating plate 8 with the locking groove 2f of the outer cylinder 2. Even if it is released, the plate tumbler 6 attached to the inner cylinder 3 still engages with the locking projection 2e of the outer cylinder 2 so that the inner cylinder 2
Is impossible to extract. In the cylinder lock according to the present invention, the inner cylinder 3 can be exchanged only when the inner cylinder exchange key 40 whose key code matches that of the cylinder lock 1 is used.

[0021]

According to the first aspect of the present invention, a single lifting plate is shared by the click mechanism and the inner cylinder replacing mechanism, and the key code of the inner cylinder replacing key matches the key code of the cylinder lock. Only, the engagement between the plate tumbler and the locking projection of the outer cylinder is released to allow the inner cylinder to be removed, so that the number of parts is not increased, the operational feeling is good, and the anti-theft property is excellent. An inner cylinder replaceable cylinder lock can be provided.

[Brief description of the drawings]

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

FIGS. 2A and 2B are diagrams showing an outer cylinder as a component of the cylinder lock of FIG. 1, wherein FIG. 2A is a sectional view and FIG. 2B is a right side view.

3A and 3B are views showing a state in which an unlocking key is inserted into the cylinder lock of FIG. 1, wherein FIG. 3A is a longitudinal sectional view and FIG. 3B is a right side view.

FIGS. 4A and 4B are cross-sectional views showing a state in which an inner cylinder replacement key is inserted into the cylinder lock of FIG. 1, wherein FIG.
Is a right side view, (c) is a sectional view taken along line II of (a),
(D) is a view similar to (c), but showing a state in which the protrusion of the elevating plate does not match the recessed recess of the outer cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder lock 2 Outer cylinder 2a Insertion opening 2b Projection 2c Flange 2d Insertion part 2e Engagement protrusion 2f Engagement groove 2h Clicking concave part 2j Bottom surface 2k Detachable concave part 2m Engagement protrusion 2n Inner surface 3 Inner cylinder 4 Tumbler hole 5 Coil Spring 6 Plate tumbler 8 Lifting plate 9 Drive pin 10 Key guide 30 Locking / unlocking key 40 Inner cylinder replacement key

Claims (1)

[Claims] 1. A cylinder lock having an outer cylinder, an inner cylinder rotatably and slidably mounted on the outer cylinder, and a keyhole extending in an axial direction of the inner cylinder, the cylinder lock having a projection at a tip end. A lifting plate urged by a coil spring so as to protrude into a locking groove formed in the outer cylinder; and a protrusion formed on the outer cylinder by the rotation of the inner cylinder. A click mechanism is formed by engaging with the recess for use, and the engagement of the locking groove of the outer cylinder is released by the insertion of the inner cylinder replacement key having a key code capable of replacing the inner cylinder. A cylinder lock, wherein the cylinder lock slides in a recess formed in the cylinder to allow the inner cylinder to be removed from the outer cylinder.