JP4202464B2 - Disc tumbler tablets - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk cylinder lock, and more particularly to a novel disk cylinder lock that makes unauthorized unlocking by picking impossible.
[0002]
[Prior art]
It is well known that ordinary cylinder locks are not limited to disk cylinder locks, and it is not impossible to perform unauthorized unlocking by so-called picking using a special tool.
[0003]
Therefore, the present applicant has previously proposed a cylinder lock that can effectively prevent illegal unlocking by picking, for example, in Japanese Patent Application No. 7-188192.
[0004]
In this cylinder lock, the inner cylinder is divided into a plurality of inner cylinder units, male threads are engraved on the outer circumference of each inner cylinder unit, and female threads that are threadedly engaged with the male threads are engraved on the inner circumference surface of the outer cylinder. The threading direction of the inner cylinder unit is set so that it moves inward when the inner cylinder unit rotates in the unlocking direction, and each inner cylinder unit is screwed into the outer cylinder so that there is no gap between them. It is.
[0005]
[Problems to be solved by the invention]
The cylinder lock according to the above-mentioned previous proposal of the present applicant cannot be picked in principle, and can be applied not only to the disc cylinder lock but also to any type of cylinder lock such as a pin cylinder lock or a lever tumbler lock. While there is an advantage, there remains a grudge that the structure is a little complicated.
[0006]
An object of the present invention is to provide a disc tumbler lock that does not greatly change the structure of a conventional disc tumbler lock, in other words, can effectively prevent picking by adding only a few components.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that an inner cylinder having a keyhole formed along a central axis and a rotatable fit with the inner cylinder, A plurality of outer cylinders formed along a bus line and having a pair of locking locking grooves and a pair of unlocking locking grooves symmetrical about the central axis, each perpendicular to the keyhole of the cylinder lock The disk tumblers are arranged in the direction of the inner cylinder axis, and when the key is inserted into the key hole, the key grooves of the key are aligned with the opposite ends of the disk tumbler aligned with the shear line. In the movement trajectory from the locking angle position of one end to the unlocking angle position, a concave portion where one end of the disc tumbler can be engaged is formed , so that both ends are aligned with the shear line by picking, and the inner circumference of the outer cylinder Rotate in the unlocking direction while being restrained by the surface Mase落込disc tumbler recess, is characterized in that so as to prevent incorrect lock by preventing rotation of the subsequent inner cylinder.
[0008]
According to the second aspect of the present invention, an inner cylinder in which a keyhole is formed along the central axis is fitted to the inner cylinder so as to be rotatable. An outer cylinder formed with a pair of locking locking grooves and a pair of unlocking locking grooves that are symmetrical with respect to the shaft, and a plurality of disc tumblers perpendicular to the keyholes of the cylinder locks, respectively, When the key is inserted into the key hole, the key groove of the key key corresponds to the both ends of the disc tumbler aligned with the shear line. A shallower groove than this is formed along the generatrix of the inner peripheral surface of the outer cylinder, so that both ends are aligned with the shear line by picking and rotated in the unlocking direction while being restrained by the inner peripheral surface of the outer cylinder. The moving disc tumbler is dropped into the groove to prevent subsequent rotation of the inner cylinder Ri is characterized in that so as to prevent incorrect lock.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 3 show a first embodiment of the present invention, that is, one embodiment of the invention described in claim 1.
[0010]
In these drawings, reference numeral 1 denotes an inner cylinder, and the inner cylinder 1 in the illustrated embodiment forms a plurality of slots 2 and 2 along its axis on a rod-shaped body having a cross-sectionally oblong cross section and along its central axis. Thus, the keyhole 3 is formed.
[0011]
A disk tumbler 4 is accommodated in each slot 2 and is guided so as to be movable in the radial direction of the inner cylinder 1, and one end (upper end in FIG. 1) of the tumbler spring 5 extends from the key hole 3. It is biased in the direction of separation.
[0012]
Since the disk tumblers 4 and 4 adjacent to each other are normally biased in the opposite direction, the other disk tumblers adjacent to the disk tumbler shown in FIG. The
[0013]
Therefore, here, the end portion that is urged by the tumbler spring 5 and is separated from the key hole 4 is referred to as one end of the disc tumbler.
[0014]
In the locked state of the disk tumbler lock, one end of each disk tumbler 4 is engaged with the locking locking groove 7 on the inner peripheral surface of the outer cylinder 6 by the elasticity of the tumbler spring 5.
[0015]
Since the inner cylinder 1 cannot be rotated in this locked state, for example, the door cannot be unlocked. On the other hand, when a key (not shown) is inserted into the key hole 3, the key groove formed in the key is It is a well-known matter to engage each corresponding disc tumbler and align one end and the other end with the shear line 9 to unlock.
[0016]
Usually, the disk tumbler lock is often turned 180 degrees after inserting the key into the key hole, so that the locking locking groove 7 and the unlocking locking groove 8 overlap each other.
[0017]
A characteristic constituent of the present invention is that the locking angle position of one end of at least one disk tumbler 4 (the angle position at 12 o'clock in terms of the clock face in FIG. 1) to the unlocking angle position (the clock face in FIG. 1). In other words, the concave portion 11 into which one end of the disc tumbler 4 can be engaged is formed in the movement trajectory up to 6 o'clock angular position.
[0018]
The recess 11 may be an opening that penetrates the outer cylinder 6 as shown in FIG. 1 or may have a bottom that does not penetrate the outer cylinder 6 (see FIG. 4).
[0019]
Further, the dimension of the recessed portion 11 in the direction of the outer cylinder axis may extend over a plurality of disk tumblers 4 and 4 or may be as short as one disk tumbler.
[0020]
Furthermore, the angular position of the recessed portion 11 around the axis of the outer cylinder 6 may be one place, or may be a plurality of places including the case where the keyhole is provided symmetrically.
[0021]
The disk tumbler lock according to the first embodiment of the present invention configured as described above can align both ends of all the disk tumblers 4 and 4 with a shear line by so-called picking. As shown in FIG. The inner cylinder 1 can be rotated in the unlocking direction (counterclockwise in FIG. 2) without inserting the key into the key 3.
[0022]
However, when the inner cylinder 1 is further rotated in the unlocking direction, when one end of the disc tumbler 4 and the recessed portion 11 are aligned, one end of the disc tumbler 4 is engaged in the recessed portion 11 as shown in FIG. And the inner cylinder 1 cannot be rotated further in the unlocking direction.
[0023]
That is, even if one end of all the tumblers is aligned with the shear line 9 by picking and the inner cylinder 1 can be rotated in the unlocking direction, the inner cylinder does not rotate immediately, so that unauthorized unlocking is prevented.
[0024]
Those who do not know the circumstances of those who have attempted unauthorized unlocking are surprised and give up further picking, and even those who know the circumstances, that is, those who know the principle of this disc tumbler lock at that angular position Lost the willingness to pick again and retreat.
[0025]
When the recessed portion 11 is formed so as to straddle all the disk tumblers as in the locking groove 7 (8), the person who attempted the unauthorized unlocking is unlocked with the combined key after the withdrawal, and there is no subsequent picking. Ordinary locking and unlocking can be performed as if it were.
[0026]
When only some of the disc tumblers 4 are engaged with the recessed portions 11, the other disc tumblers 4 are in a state where both ends thereof are aligned with the shear line 9. Cannot be inserted into the keyhole.
[0027]
In such a case, the lock is removed from the door by replacing the disk cylinder lock, the disk tumbler engaged with the recess 11 is aligned with the shear line 9 with a tool, and the inner cylinder 1 is positioned at the locking angle position or unlocked. Return to the lock angle position and attach it to the door again.
[0028]
In the first place, it is rare that the cylinder lock will be picked, and even if it is a little troublesome to return the cylinder lock that could be prevented from theft by picking as described above to the original state, it can be done. There is no.
[0029]
FIG. 4 shows a second embodiment of the present invention, that is, an embodiment of the invention described in claim 2. In the second embodiment, a locking groove 7 for locking and a locking groove 8 for unlocking are shown. In between, the shallower drop grooves 12 are formed so as to straddle all the disk tumblers 4 and 4.
[0030]
The disc tumbler lock according to the second embodiment corresponds to the case where the shallow recess 11 is formed so as to straddle all the disc tumblers 4 and 4 in the disc tumbler lock according to the first embodiment. Since all the tumblers are engaged with the dropping groove 12 in a state where it is aligned with the dropping groove 12, further unauthorized unlocking is impossible.
[0031]
Moreover, since the effect is the same as that of the first embodiment, further detailed description is omitted.
[0032]
The mechanism for preventing unauthorized unlocking of the disk tumbler lock according to the second embodiment has another advantage that it is relatively easy to manufacture because the drop groove 12 is formed so as to straddle all the tumblers.
[0033]
In the illustrated embodiment, the recessed portion 11 or the dropping groove 12 is provided in line symmetry with respect to the locking groove 7 (8). This is because the unlocking direction of the disc tumbler lock changes depending on the door opening method. This is not an essential configuration of the present invention.
[0034]
【The invention's effect】
As is apparent from the above description, the present invention forms a recess or a drop groove that engages with at least one disk tumbler between the locking locking groove and the unlocking locking groove. With the addition of the simple configuration, the rotation of the inner cylinder is stopped in the middle of the unauthorized unlocking by picking, and an excellent effect is obtained that the unauthorized unlocking can be prevented without allowing any further rotation.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of a disk cylinder lock according to a first embodiment of the present invention, showing a locked state.
FIG. 2 is a diagrammatic cross-sectional view of a disk cylinder lock according to a first embodiment of the present invention, showing an initial rotation after picking.
FIG. 3 is a diagrammatic cross-sectional view of the disk cylinder lock according to the first embodiment of the present invention, showing a state in which the disk tumbler has dropped into the recessed portion after picking and cannot be further rotated.
FIG. 4 is a schematic cross-sectional view of a disk cylinder lock according to a second embodiment of the present invention, showing a state in which the disk tumbler has dropped into the dropping groove after picking and cannot be rotated any further.
[Explanation of symbols]
1 Inner cylinder 3 Key hole 4 Disc tumbler 5 Tumbler spring 6 Outer cylinder 7 Locking locking groove 8 Unlocking locking groove 9 Shear line 11 Recessed portion 12 Drop groove

Claims (2)

An inner cylinder having a key hole along the central axis, and a pair of locking latches that are pivotably fitted to the inner cylinder and that are along the generatrix and symmetrical with respect to the central axis. And an outer cylinder formed with a groove and a pair of unlocking locking grooves, each having a plurality of disk tumblers arranged perpendicular to the key hole of the cylinder lock in the inner cylinder axial direction, and the key is used as the key hole. In the case where each keyway of the key key is inserted so that both ends of the corresponding disc tumbler are aligned with the shear line, at least one disc tumbler in the movement locus from the locking angle position to the unlocking angle position of one end, one end of the disc tumbler forms the engaging enterable recess, than Te, aligned at both ends sheerline by picking recess disc tumbler which rotates unlocking direction while being constrained within the outer cylinder peripheral surface The inner cylinder after that Disc tumbler lock, characterized in that so as to prevent incorrect lock by preventing rotation. An inner cylinder having a key hole along the central axis, and a pair of locking latches that are pivotably fitted to the inner cylinder and that are along the generatrix and symmetrical with respect to the central axis. And an outer cylinder formed with a groove and a pair of unlocking locking grooves, each having a plurality of disk tumblers arranged perpendicular to the key hole of the cylinder lock in the inner cylinder axial direction, and the key is used as the key hole. When the both ends of the disk tumbler corresponding to each keyway of the key key are aligned with the shear line when inserted, remove the shallower drop groove between the locking locking groove and the unlocking locking groove. Formed along the generatrix of the cylinder inner peripheral surface, so that both ends are aligned with the shear line by picking, and the disc tumbler that rotates in the unlocking direction while being restrained by the outer peripheral surface of the outer cylinder is dropped into the groove, so as to prevent incorrect lock by preventing rotation of the subsequent inner cylinder Disc tumbler lock, characterized in that.

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