JP2008223386A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder lock which dispenses with a V-shaped cam groove formed in an external cylinder, and can reduce the dimension thereof in a radial direction. <P>SOLUTION: The cylinder lock has the external cylinder 1, an internal cylinder 2, a guide groove formed in an internal cylinder peripheral surface, a locking bar 3 stored in the guide groove, and a plurality of tumblers 4, 4, and when a duplicate key is inserted into a keyhole of the cylinder lock, unlocking cutouts formed in the tumblers are aligned with the locking bar 3. Herein a front surface blocking portion formed like a thick ring is formed at an external edge opening rim of the external cylinder in one body with the same. The front surface blocking portion has a dip 12 formed in an internal surface thereof, into which an external edge of the locking bar is fitted, and which has inclined surfaces. Then the locking bar is energized outward, and projective teeth 15, 15 are integrally formed on an internal surface of the locking bar 3 corresponding in number to the number of the tumblers. Further the size of each projective tooth is set so as to squeeze through the unlocking notch, and the formation location of each projective tooth on an internal surface of the locking bar is set to approach the tumbler outside the corresponding tumbler at the time of locking. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cylinder lock, and more particularly, to a cylinder lock capable of reducing a radial dimension.

The present applicant has previously proposed a novel variable cylinder lock with Patent Document 1 below.
This variable cylinder lock has an outer cylinder and an inner cylinder that is rotatably fitted inside the outer cylinder, and is located at one angular position on the inner peripheral surface of the outer cylinder along its generatrix. A cam groove having a V-shaped cross section is formed, and an operation groove is formed at another angular position separated from the cam groove by a rotation angle of the inner cylinder or more, while the inner cylinder is formed by a plane parallel to the rotation axis. The inner cylinder A and the inner cylinder B are divided to leave a key hole including the rotation axis of the inner cylinder on the inner cylinder A side, and the inner cylinder B is restrained from moving in the rotation axis direction by the inner cylinder A. At the same time, the inner cylinder B is guided so as to be movable in the radial direction with respect to the inner cylinder A, and further, the inner cylinder B is urged in a direction away from the inner cylinder A, and along the rotation axis of the inner cylinder A. A plate-like tumbler A having a key insertion hole is inserted into each of a plurality of arranged slots so as to be movable in the radial direction of the inner cylinder, and each tumbler A is predetermined. Urging in the direction, and forming a row of teeth on the side edge of each tumbler A on the inner cylinder B side, on the surface facing the inner cylinder A of the inner cylinder B, corresponding to each tumbler A, The same number of tumblers B are arranged so as to be movable in the radial direction, and a dentition row that can mesh with the dentition row of the tumbler A is formed on the tumbler A side of each tumbler B. An unlocking notch is formed in the opposite side portion, and further, extends on the side facing the inner peripheral surface of the outer cylinder of the inner cylinder B in the direction of the generatrix of the outer cylinder, and the outside can be engaged with the cam groove. A locking bar which is formed into a V-shaped cross section and has a protrusion which can be engaged with the unlocking notch of the tumbler B on the inside is supported so as to be movable in the radial direction of the inner cylinder. In other words, it is biased in the direction of entering the cam groove of the outer cylinder, and thus the key hole of the inner cylinder When the key is inserted, the position of the unlocking notch of each tumbler B determined by the engagement between the keyway of the key and the opening edge of the tumbler A can be aligned with the protrusion of the locking bar, while the inner end of the inner cylinder In addition, the outer end of the tail piece is connected so as to be relatively rotatable, and a connecting pin biased outward is provided so as to straddle the sliding surface. And a release member for releasing the coupling between the inner cylinder and the tail piece by aligning the top of the connecting pin with the sliding surface of the inner cylinder and the tail piece. To do.
Japanese Patent Application No. 2006-154002 JP 2000-291300 A JP 2003-226833 A

  In the cylinder lock according to the invention described in Patent Document 1, a cam groove having a V-shaped cross section is formed along the generatrix at one angular position on the inner peripheral surface of the outer cylinder. A locking bar urged toward the center of the inner cylinder is housed.

  When the key is inserted into the key hole of the inner cylinder, the unlocking notch formed in each tumbler is aligned with the protrusion formed on the inner side of the locking bar, so that the locking is achieved by the relative rotation of the inner cylinder and the outer cylinder. The cylinder can be moved toward the center of the guide inner cylinder, and the cylinder lock is unlocked in this way.

  The so-called lever tumbler lock or rotary disc tumbler lock described in Patent Documents 2 and 3 also has the same locking mechanism as the cylinder lock disclosed in Patent Document 1.

  Thus, the cylinder locks exemplified in Patent Documents 1 to 3 have a common configuration in which a cam groove having a V-shaped cross section is formed along the generatrix at one angular position on the inner peripheral surface of the outer cylinder. In order to maintain the strength of the outer cylinder, the outer cylinder is made thicker (see FIG. 1 of Patent Document 1), or a protrusion is formed at the same angular position as the cam groove on the outer peripheral surface of the outer cylinder (Patent Document 2). (See FIG. 2).

  Accordingly, an object of the present invention is to provide a cylinder lock that can eliminate the V-shaped cam groove in the outer cylinder and reduce the radial dimension.

  In order to achieve the above object, an invention according to claim 1 is directed to an outer cylinder, an inner cylinder that is rotatably fitted inside the outer cylinder, and a direction of the generatrix at one angular position of the outer peripheral surface of the inner cylinder. A guide groove formed to extend, a locking bar housed in the guide groove and guided to be movable in the length direction, and disposed along the central axis in the inner cylinder, and perpendicular to the central axis A plurality of tumblers which are guided movably in a flat plane and formed with unlocked notches on the outer edge, and when the key is inserted into the key hole, the tumbler is released by the engagement of the key and each tumbler. In the case where the lock notch is moved and aligned with the locking bar, a thick ring-shaped front blocking part is integrally formed at the outer edge opening edge of the outer cylinder, and the locking is performed when the inner surface of the front blocking part is locked. Locking to align with the bar The outer end of the ring can be engaged, and a recess having an inclined surface is formed. On the other hand, the locking bar is urged outward, and the inner surface of the locking bar facing the central axis of the inner cylinder is associated with each tumbler. The same number of teeth as the tumbler are integrally formed, and the size of each tooth is set so that it can pass through the unlocking notch, and the position of each protrusion on the inner surface of the locking bar corresponds to the time of locking. It is characterized in that it is set to be close to the tumbler outside the tumbler.

  In the cylinder lock according to the first and second aspects of the present invention configured as described above, when the inner cylinder rotates relative to the outer cylinder, the locking bar does not move in the radial direction of the inner cylinder. Since it moves in the length direction along the generatrix of the outer peripheral surface, it is not necessary to form a cam groove having a V-shaped cross section on the inner peripheral surface of the outer cylinder unlike the conventional cylinder lock of the same type.

  Therefore, it is possible to reduce the size of the cylinder lock in the radial direction, and there is an expected effect that there are no structural or design restrictions.

  In the cylinder lock of the type in which the unlocking notch of each tumbler is aligned with the locking bar when the key is inserted into the key hole, this alignment state is detected not by the movement of the locking bar in the radial direction but by the movement in the length direction. By changing the way of thinking, it was possible to reduce the radial dimension of the outer cylinder of the cylinder lock.

An embodiment of the invention described in the claims will be described below with reference to the drawings.
1 to 3, reference numeral 1 indicates an outer cylinder, reference numeral 2 indicates an inner cylinder, and the inner cylinder 2 is fitted inside the outer cylinder 1 so as to be relatively rotatable, similarly to a general cylinder lock. It is.

  A guide groove (not numbered) formed along the bus bar is formed at a predetermined angular position on the outer peripheral surface of the inner cylinder 2, for example, an angular position at 6 o'clock in FIG. In this guide groove, a rocking bar 3 (see FIG. 2) having a convex cross section, for example, is housed and guided so as to be movable in its length direction.

  On the other hand, as shown in FIGS. 2 to 4, a plurality of tumblers 4, 4 are disposed in the inner cylinder 2 along the central axis of the inner cylinder, and can move within a plane perpendicular to the central axis. It is guided to.

  As shown in FIGS. 4 and 5, each tumbler 4 is a plate-like body, and has a generally J-shaped tumbler A5 and an elongated tumbler B6 formed with an unlocking notch 7 on the outside. It is connected by meshing of the tooth rows that are not.

  Both the tumblers 5 and 6 can be changed to, for example, three types as shown in FIG. 5 by changing the meshing of the teeth row.

  The change in meshing and the key difference associated with the change in meshing are not the gist of the present invention and are described in detail in the above-mentioned Patent Document 1, and therefore, further detailed description is omitted here.

  In short, the cylinder lock in the illustrated embodiment can obtain, for example, three types of key differences by changing the relative positions of the tumblers 5 and 6, and when the key 9 is inserted into the key hole 8 (see FIG. 1), As shown in FIG. 4, the unlocking cutout 7 of each tumbler 4 is aligned with the locking bar 3.

  In the invention described in Patent Document 1, if the locking bar 3 is housed in a cam groove having a V-shaped cross section formed in the outer cylinder, and the inner cylinder is rotated relative to the outer cylinder, Due to the cam action between the cam groove and the locking bar 3, the locking bar 3 moves in the center direction of the inner cylinder, in other words, in the radial direction of the inner cylinder, and the inner cylinder can be rotated. In other words, the cylinder lock is unlocked.

  The above configuration is that of the variable cylinder lock according to the invention described in Patent Document 1, but the characteristic configuration of the present invention is that the locking bar 3 is not in the inner cylinder radial direction but in the length direction as described below. The point is to drive.

  Therefore, as shown in FIG. 3, a front ring-shaped closing portion 11 having a pressure ring shape is formed at the outer end opening edge of the outer cylinder 1.

  And as shown in FIG. 2, the hollow 12 which has an inclined surface and can engage the outer end of a locking bar is formed in the position which aligns with the locking bar 3 at the time of locking of this front side obstruction | occlusion part inner surface.

  In the illustrated embodiment, the recess 12 has a bowl shape, and the outer end of the locking bar 3 is formed in a conical shape corresponding to the recess.

  On the other hand, as shown in FIG. 2, a cup-shaped spring pin 14 is guided on the front surface of a tail piece 13 provided at the inner end of the inner cylinder so as to be movable in the inner cylinder axis direction, in other words, in the left-right direction in FIG. It is urged outward (leftward in FIG. 2) by the elasticity of an unnumbered compression coil spring built in the spring pin.

  Since the spring pin 14 is in contact with the inner end of the locking bar 3, the locking bar 3 is eventually biased outward, that is, in a direction in which the outer end is engaged with the recess 12.

  On the other hand, on the inner surface (upper surface in FIG. 2) of the locking bar 3 facing the central axis of the inner cylinder, the same number of projecting teeth 15 and 15 (FIG. 2) along the length direction and corresponding to each tumbler. Are integrally formed.

  The size of each protruding tooth 15 is set so that it can pass through the unlocking cutout 7 of the tumbler.

  Moreover, the formation position in the inner surface of the locking bar 3 of each protrusion 15 is set so that it may adjoin to a tumbler in the outer side of the tumbler corresponding at the time of locking.

  In the cylinder lock according to the embodiment of the present invention configured as described above, when the key is inserted into the inner cylinder key hole, the unlocking cutout 7 of each tumbler is aligned with the locking bar 3 as described above (FIG. 4). reference).

  When the key is rotated in this state, for example, when the inner cylinder is rotated clockwise, the angular position of the recess 12 and the locking bar 3 is shifted, so that the locking bar 3 is recessed by the cam action between the inclined surface of the recess. Extruded from 12 and moved inward.

  As described above, when the key is inserted into the keyhole, the unlocking cutouts 7 and 7 of all the tumblers are aligned with the locking bar 3. Therefore, when the locking bar 3 is moved inward, each protruding tooth 15 has the unlocking cutout 7. Can dive through.

  In other words, relative rotation of the inner cylinder 2 with respect to the outer cylinder 1 becomes possible. For example, the cylinder lock is unlocked by rotating the inner cylinder 90 degrees.

  Then, when the inner cylinder 2 is rotated by a predetermined angle, as shown in FIG. 6, the outer end of the locking bar 3 gets off the recess 12 and rides on the inner surface of the front blocking portion 12.

  On the other hand, when a different key that is not a key is inserted into the keyhole, the unlocking cutout 7 of at least one tumbler does not align with the locking bar 3, and therefore does not align with the locking bar 3 when the inner cylinder is rotated. The cylinder lock cannot be unlocked because the protrusion 15 on the inner surface of the locking bar corresponding to the tumbler or the unlocking notch 7 cannot pass through and the inner cylinder cannot be rotated any further.

  In the illustrated embodiment, as shown in FIG. 5, the tumblers A and B (5, 6) are divided and the meshing by the protruding tooth row is changed to obtain a key difference. Thus, it is possible to consider a cylinder lock that is integrally coupled to obtain three types of tumblers, and it goes without saying that the present invention can also be applied to such a cylinder lock.

  The present invention is not limited to the illustrated embodiment, and can be implemented with various modifications.

  For example, as shown in FIGS. 7 and 8, if the recess 12 has the same width along the circumferential direction of the front blocking portion 11, the outer end of the locking bar 3 does not have to be formed into a conical shape.

  The original form of the lever tumbler lock according to the invention described in Patent Document 2 includes an outer cylinder formed with a cam groove along a generatrix of the inner peripheral surface, and a free fitting with the outer cylinder via a gap. A plurality of partition plates stacked in the direction of the central axis, and an inner cylinder that extends through the key hole along the central axis, and extends along the generatrix of the inner cylinder. A locking bar which is guided so as to be movable in the direction and is biased in a direction in which an outer edge engaged with the cam groove protrudes outwardly, and swings one end in each slot between the partition plates. It is pivotally supported and has an unlocking notch that accepts the inner edge of the locking bar at the other end. The overall shape is a C-shaped tumbler. it can.

  Furthermore, the rotary disc tumbler lock described in Patent Document 3 includes an outer cylinder having a cam groove formed along a generatrix of the inner peripheral surface, and a rotary fit to the outer cylinder, and a center through a gap. A plurality of partition plates stacked in the axial direction are provided, and an inner cylinder that penetrates the key hole along the central axis, and extends along the generatrix of the inner cylinder, and radially in the outer peripheral portion of the inner cylinder A locking bar which is guided so as to be movable, and whose outer edge engaged with the cam groove is biased in a direction protruding outward, and a key hole is formed in each slot between the partition plates in the center portion. An annular rotary disc tumbler having a key insertion hole of a size that can be surrounded is inserted, and one of its substantial parts is pivotally supported on a support shaft that penetrates the inner cylinder in the axial direction, An unlocking notch is formed on the outer edge of the free end, while the key is inserted At the opening edge of the opening, an engaging protrusion is formed integrally to interfere with the flat part or edge part of the blade of the key lock inserted into the key hole, and each rotary disk tumbler is connected to the opening protrusion. Energized in the direction close to the key, and normally locked to the backup pin penetrating the inner cylinder in the axial direction, and on the other hand, each of the engagement protrusions of these tumbler groups is inserted through the key hole The unlocking notch of each rotary disk tumbler is aligned with the inner edge of the locking bar when engaged with the corresponding recess formed in The invention can be applied.

The front view of the cylinder lock by one Example of this invention. The partial cross-sectional top view. The partial cross section side view. FIG. The front view which shows the kind of tumbler. It is the partial cross section side view similar to FIG. 3, and shows the state which rotated the inner cylinder 180 degree | times. The front obstruction | occlusion part back surface figure which shows the hollow in Example 2. FIG. Sectional drawing by the VIII-VIII line.

Explanation of symbols

1 outer cylinder 2 inner cylinder 3 locking bar 4 tumbler 5 tumbler A
6 Driver B
7 Unlocking Notch 8 Key Hole 9 Joint Key 11 Front Blocking Part 12 Depression 13 Tailpiece 14 Spring Pin 15 Projection Tooth

Claims (1)

  An outer cylinder, an inner cylinder that fits rotatably inside, a guide groove formed to extend in the direction of the generatrix at one angular position on the outer peripheral surface of the inner cylinder, and stored in the guide groove And a locking bar guided so as to be movable in the length direction, and disposed along the central axis in the inner cylinder, and movably guided in a plane perpendicular to the central axis, and unlocked to the outer edge. In what has a plurality of tumblers formed with notches, and when the key is inserted into the keyhole, the unlocking notch of the tumbler is moved by the engagement of the key and each tumbler so as to align with the locking bar. A thick ring-shaped front blocking part is formed integrally on the outer edge opening edge of the outer cylinder, and the outer end of the locking bar can be engaged with the locking bar on the inner surface of the front blocking part. Forming a recess with a surface; On the inner side of the locking bar facing the inner cylinder center axis, the same number of teeth as the tumbler are integrally formed, and the size of each tooth Is set so as to be able to pass through the unlocking notch, and the formation position of each protruding tooth on the inner surface of the locking bar is set to be close to the tumbler outside the corresponding tumbler at the time of locking. Cylinder lock.

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