JP2007297896A - Variable cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new variable cylinder lock by which key difference conversion is performed easily and surely without removing a cylinder. <P>SOLUTION: An inner cylinder 2 of the cylinder lock is divided into an inner cylinder A5 and the other inner cylinder B. A cam groove 3 having a V-letter shape in transverse section is formed along a bus bar of an outer cylinder 1 at an angular position of the outer cylinder 1. An operation groove 4 is formed at another angular position spaced from the cam groove 3 by more than an angle of rotational movement of the inner cylinder. A row of projecting teeth which guides a tumbler A9 and a tumbler B21 to be movable in the radial direction of the inner cylinder A and the inner cylinder B, respectively, and is engageable with the mutually facing side end edges, respectively, is formed. The engagement by the row of projecting teeth is released by inserting a duplicate key into a key hole, moving a locking bar 23 out of the cam groove 3, and rotating it by 180 degrees to reach the operation groove 4. Then a new duplicate key is inserted into the key hole, and is rotated in the opposite direction by 180 degrees to obtain new key difference. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a novel variable cylinder lock, and more particularly to a variable cylinder lock that can easily and reliably perform a key difference conversion operation and convert a key difference without removing the cylinder.

  The present applicant has previously proposed a novel variable lever tumbler lock with Patent Document 1 described later.

In this variable lever tumbler lock, if necessary, an ordinary C-shaped lever tumbler is divided into two parts A and B, and a plurality of engaging recesses are formed on one of them, and an engaging protrusion is formed on the other. After determining the key difference by engaging the mating protrusion with one of the engaging recesses, after resolving the conventional key difference by inserting the tumblers A and B at the time of key difference conversion, and after inserting a new key The tumblers A and B are converted to a new key difference by determining the new engagement of the engagement protrusion and the engagement recess when the tumblers A and B are brought close again.
Japanese Patent Application No. 2004-305740

  Of course, the variable lever tumbler lock according to the invention described in Patent Document 1 exhibits the intended function, but the tumblers A and B are in sliding contact with each other when the key is changed. Anxiety remains.

  Therefore, the present invention proposes a novel variable cylinder lock whose structure is completely different from that of the variable lever tumbler lock described in the above-mentioned Patent Document 1, and therefore aims to make the conversion operation of the key difference simple and reliable. Yes.

  In order to achieve the above object, the present invention has an outer cylinder and an inner cylinder that is rotatably fitted inside the outer cylinder, and is provided at one angular position on the inner peripheral surface of the outer cylinder. A cam groove having a V-shaped cross section is formed along the generatrix, and an operating groove is formed at another angular position separated from the cam groove by a rotation angle of the inner cylinder, while the inner cylinder is rotated. The inner cylinder A and the inner cylinder B are divided by a plane parallel to the axis to leave a key hole including the rotation axis of the inner cylinder on the inner cylinder A side. In addition to restraining the movement in the direction, 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 away from the inner cylinder A. A plate-shaped tumbler A having a key insertion hole is inserted in each of a plurality of slots arranged along the rotation axis so as to be movable in the radial direction of the inner cylinder, and each tab. The tumbler A is urged in a predetermined direction, and a protruding tooth row is formed on the side end edge of each tumbler A on the inner cylinder B side, while each tumbler A is formed on the surface of the inner cylinder B facing the inner cylinder A. The same number of tumblers B are disposed 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 a portion opposite to the protruding tooth row of the inner cylinder B. Further, the inner cylinder B is extended in the generatrix direction of the outer cylinder on the side facing the outer peripheral surface of the outer cylinder, and the outer side of the cam groove A locking bar formed with a protrusion that can be engaged with the unlocking notch of the tumbler B is supported so as to be movable in the radial direction of the inner cylinder. Energize the bar outward, that is, in the direction of entering the cam groove of the outer cylinder, When the key is inserted into the key hole of the inner cylinder, the position of the unlocking notch of each tumbler B determined by the engagement between the key groove of the key and the opening edge of the tumbler A can be aligned with the protrusion of the locking bar. On the other hand, the outer end of the tailpiece is connected to the inner end of the inner cylinder so as to be relatively rotatable, and a connecting pin biased outward is provided so as to straddle the sliding surface. In a normal state, the inner cylinder and the tail piece are integrally coupled, and the release member that uncouples the inner cylinder and the tail piece by aligning the top of the connecting pin with the outer cylinder and the sliding surface of the inner cylinder and the tail piece. Is provided.

  The variable cylinder lock according to the present invention configured as described above has a tumbler B integrally connected to the tumbler A by inserting the key into the inner cylinder keyhole in normal use using a key. Since the engagement notch of the lock aligns with the protrusion of the locking bar, the inner cylinder is released from the cam groove of the locking guide outer cylinder by rotating the inner cylinder via the key, as with the conventional lever tumbler lock. It can move in the axial direction.

  That is, the inner cylinder can be rotated relative to the outer cylinder, and the locking / unlocking operation can be performed by transmitting the rotation of the inner cylinder to the tail piece.

  To change the key difference of this variable cylinder lock, insert the previous key into the keyhole, operate the release member to release the inner cylinder from the tailpiece, and then rotate the inner cylinder in the unlocking direction, for example Let

  Then, due to the wedge action caused by the relative rotation between the locking bar and the cam groove of the outer cylinder, the locking bar is released from the locking guide cam groove and rides on the inner peripheral surface of the outer cylinder. The portion of the inner cylinder B that is held falls into the operating groove, and the inner cylinder B is separated from the inner cylinder A.

  Therefore, the tumblers A and B are disengaged from each other and the entire unlocking notch of the inner cylinder B is engaged with the protrusion of the locking bar. Can be removed.

  Next, when a new key is inserted into the keyhole, all the tumblers A are set to positions corresponding to the new key, so that when the inner cylinder is returned to the original angular position in this state, the inner cylinder B holding the locking bar. Since the part of the tumbler rides on the inner peripheral surface of the outer cylinder from the operating groove, all the sets of tumblers A and B are close to each other, and the respective tooth row is connected to each other with a new engagement, and thus a new key difference Is obtained.

  In this case, the protrusions of the tumblers A and B are separated without coming into sliding contact with each other or close to each other to form a new meshing, so that the key difference conversion operation is simple and reliable.

  The inner cylinder is divided into inner cylinders A and B that are relatively movable in the radial direction, and the inner cylinders A and B are separated or brought close to each other by using a step between the operation groove and the outer peripheral surface of the outer cylinder. At this time, the key difference is converted by changing the relative positions of the tumblers A and B using the tooth rows formed on the tumblers A and B, so that the conversion operation is simple and reliable.

An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an outer cylinder, and reference numeral 2 denotes an inner cylinder. The outer cylinder 1 and the inner cylinder 2 are fitted so as to be relatively rotatable.

  The cam groove 3 having a substantially V-shaped cross section is also provided at an angular position of 6 o'clock in terms of the clock face on the inner peripheral surface of the outer cylinder 1 as in the case of the outer cylinder of the conventional lever tumbler lock. In other words, the operation grooves 4 are formed along the generatrix at the 12 o'clock angular position.

  On the other hand, the inner cylinder 2 is divided into an inner cylinder A and an inner cylinder B by a plane parallel to the rotation axis of the inner cylinder 2 as shown in FIG.

  As shown in FIGS. 2 to 9, the inner cylinder A forms a key hole 7 (see FIGS. 2, 7, and 8) into which a key to be described later is inserted, and a plurality ( In the illustrated embodiment, it is a columnar body in which six slots (see FIGS. 4 and 5) are formed.

  As shown in FIG. 1, a tumbler A is inserted into each slot 8 and is urged in a predetermined direction (in the diagonally lower left direction in FIG. 1) by the elasticity of the tumbler spring 11 as a compression coil spring.

  As shown in FIGS. 10 and 11, the tumbler A9 is a plate-like body having a substantially J-shape because the spring hook 12 is formed, and the thick straight portion is formed along the length direction thereof. In FIG. 10, a vertically long and narrow rectangular key insertion hole 13 is opened.

  And the part which gave the up-and-down hatching in FIG. 10 of FIG. 10 of the key insertion hole 13 becomes the opening edge which engages with the keyway of the joint key mentioned later.

  Further, a protruding tooth row 14 is formed on the side edge of each tumbler A on the inner cylinder B side described later, that is, on the left side edge in FIG.

  In the illustrated embodiment, each of the teeth constituting the tooth row 14 is triangular, but as will be described later, this tooth row 14 meshes with the tooth row of the tumbler B and couples the tumbler A and the tumbler B to each other. Therefore, if it is possible to engage with each other, a rectangular tooth row may be used.

  In the illustrated embodiment, all the spring hooks 12, 12 of the plurality of tumblers A9, 9 are mounted on the same side with respect to the key hole 7, but this is, for example, on the opposite side every other one. You may attach to.

  Furthermore, as shown in FIG. 3, FIG. 4, FIG. 7 and FIG. 8, the lower side in the drawing of the inner cylinder A leaves the partition blocks 15 and 15 (see FIG. 3, FIG. 7 and FIG. 8) in the front and rear. The meat is stolen, and the storage guide portion 16 (see FIGS. 3, 7 and 8) of the inner cylinder B is formed here, and the inner cylinder B described below is stored therein.

  The inner cylinder B6 is a block body having a substantially triangular cross section (see FIG. 13) as shown in FIGS. 12 to 14, and a locking bar receiving groove 17 (FIG. 13) having a substantially convex cross section on the lower surface side. Reference) is formed.

  As shown in FIGS. 12 and 13, a plurality of (six in the illustrated embodiment) guide grooves 18 are formed on the upper surface of the inner cylinder B6 on the inner cylinder A side along the rotation axis of the inner cylinder 2. , 18 are formed.

  As shown in FIG. 14, each guide groove 18 has an inverted “T” shape and extends in the radial direction of the inner cylinder in the same manner as the tumbler A9 (see FIG. 1).

  Also. In each guide groove 18, as shown in FIGS. 15 and 16, a tumbler B 21, which is an elongated rectangular parallelepiped and has a short columnar engagement protrusion 19 projecting from both ends of one surface, is provided with the engagement protrusion 19. It is housed in a state where it is engaged with a deep portion of the guide groove 18 having the above-mentioned toroidal cross section, and is guided so as to be slidable in the length direction thereof, that is, in the radial direction of the inner cylinder 2.

  Furthermore, as shown in FIG. 15, a protruding tooth row 14 that can mesh with the protruding tooth row formed on the tumbler A9 is formed on the side edge of the tumbler B21 facing the tumbler A9.

  In addition, a rectangular unlocking notch 22 having a slightly larger opening width is formed at the other side end edge parallel to the side end edge on which the protruding row 14 of the tumbler B21 is formed.

  The inner cylinder B6 configured as described above is inserted between the partition blocks 15 and 15 of the inner cylinder A5 with the tumblers B21 and 21 facing the tumbler A9 as shown in FIG. 1 (FIG. 1). reference).

  By inserting the inner cylinder B6 between the partition blocks 15 and 15, the movement of the inner cylinder B6 in the inner cylinder rotation axis direction is restrained.

  Further, as shown in FIG. 1, the locking bar storage groove 17 (see FIG. 13) of the inner cylinder B <b> 6 extends in the generatrix direction of the inner peripheral surface of the outer cylinder 1, and the outside engages with the cam groove 3. A locking bar 23 which is formed into a V-shaped cross section that can be mated and has a protrusion that can be engaged with the unlocking notch 22 of the tumbler B on the inside is fitted with the protrusion on the inside.

  Then, both ends of the locking bar 23 where the protrusions are not formed are engaged in holding grooves 24 (see FIGS. 7 and 8) formed in the partition block 15 of the inner cylinder A5, as shown in FIG. Since the inner cylinder B6 is engaged with the locking bar (see FIG. 1), the inner cylinder B6 is eventually guided so as to be movable only in the radial direction.

  Furthermore, an inner cylinder spring 26 (as a compression coil spring) having one end engaged with a pair of inner cylinder spring housing holes 25 and 25 (see FIG. 6) opened on the side of the inner cylinder A5 facing the inner cylinder B6. 17), the inner cylinder B6 is biased in a direction away from the inner cylinder A5.

  Further, like the pair of inner cylinder spring housing holes 25, 25, part of the pair of locking bar spring housing holes 27, 27 (see FIG. 6) opened on the side of the inner cylinder A5 facing the inner cylinder B6. Due to the elasticity of the pair of locking bar springs 28 and 28 (see FIG. 17) as the engaged compression coil springs, the locking bar 23 is urged outwardly, that is, in the direction of being elastically pressed against the inner peripheral surface of the outer cylinder. ing.

  The operation of the variable cylinder lock configured as described above is a combination of a so-called disc tumbler lock and a lever tumbler lock. When the different key 29 is inserted into the key hole as shown in FIG. The protrusion of the locking bar 23 and the unlocking notch 22 of the tumbler B21 are not aligned.

  Therefore, when trying to rotate the inner cylinder 2 through a different key, the locking bar 23 moves in the direction of the central axis of the inner cylinder due to the wedge action generated between the locking bar 23 and the cam groove 3 (see FIG. 1) of the outer cylinder. However, as apparent from FIG. 18, since the protrusion 23 of the locking bar is stopped by the tumbler B21, the inner cylinder cannot be turned.

  On the other hand, when the key 31 is inserted into the key hole as shown in FIG. 1, the positions of the tumbler A and the tumbler B integral therewith are determined by the engagement between the opening edge of the tumbler A9 and the key groove of the key. Since the protrusion and the unlocking notch 22 are aligned, as shown in FIG. 1, the locking bar 23 is movable in the direction of the inner cylinder central axis, the locking bar rides on the inner peripheral surface of the outer cylinder, and the inner cylinder rotates. It becomes possible to move.

  In the illustrated embodiment, the depth of the keyway is set to be 4 steps, from the shallowest as shown in FIG. 1, to the steps as shown in FIGS. Become deeper.

  Further, in FIGS. 1 and 18 to 21, vertical hatched portions indicate a keyhole word (a cross-sectional shape of the keyhole 7: see FIG. 7).

  Furthermore, the rotation angle of the inner cylinder 2, in other words, the operating angle is 90 degrees. For example, a key is inserted into the keyhole and locked by turning 90 degrees clockwise, and turning back 90 degrees counterclockwise. When the key is pulled out and unlocked, the key is inserted into the keyhole, unlocked by turning 90 degrees counterclockwise, and turned back 90 degrees clockwise to remove the key.

  Therefore, in a normal use state, the locking bar storage portion of the inner cylinder does not reach the operating groove 4 (see FIG. 1), and the inner cylinder B is biased outward as described above. The engagement state of the tumblers A and B is not restricted by the inner peripheral surface of the outer cylinder.

  The feature of the variable cylinder lock according to the present invention is that the key difference can be freely changed by changing the meshing of the tumblers A and B.

  For this purpose, as shown in FIGS. 17 and 22, the tail piece 32 that connects the inner cylinder A5 and the inner cylinder to the locking / unlocking mechanism is configured to be relatively rotatable.

  Specifically, as shown in FIG. 17, the embankment 33 formed on the outer end surface of the tailpiece is inserted into the recessed portion formed on the inner end surface of the inner cylinder A so as to be relatively rotatable.

  Then, since the rotation of the inner cylinder is idle and the rotation is not transmitted to the tail piece, as shown in FIG. 24, a connecting pin 34 is provided to straddle the inner end surface of the inner cylinder A and the outer end surface of the tail piece which are in sliding contact with each other. It has been.

  The connecting pin 34 has a small cup shape as shown in FIG. 24, and has a bottomed head portion at a first recessed portion 35 (see FIG. 9) formed on the inner end surface of the inner cylinder A, and an open end portion. The elasticity of the connecting spring 37 (see FIG. 24) as a compression coil spring fitted into the second recessed portion 36 (see FIG. 23) formed on the outer end surface of the tailpiece 32 and elastically mounted in the connecting pin 34. Thus, the inner cylinder A5 and the tail piece 32 are integrally connected in such a manner that the head is elastically contacted with the bottom of the first recessed portion 35.

  Thus, in the variable cylinder lock according to claim 2, as shown in FIG. 25, the switch member 38 that can be engaged with the connecting pin protruding in the radial direction from the inner cylinder is movable in the paper surface direction. It is guided to.

  Then, as shown in FIG. 26, by operating a switch lever 39 connected to the switch member 38 and exposed on the outer peripheral surface of the outer cylinder with the fingers, the connecting pin 34 is connected to the second concave portion on the tail piece side. It can be pushed into 36 and the linkage between the inner cylinder and the tail piece 32 can be released.

  This operation is suitable when the variable cylinder lock can be handled alone, for example, when a key difference is set before shipment in a factory.

  In the variable cylinder lock according to the second aspect of the present invention configured as described above, in order to change the key difference, first, the previous key is inserted into the key hole, and the inner cylinder is rotated as shown in FIG. When the inner cylinder is turned to the turning angle as shown in FIG. 27, for example, when the inner cylinder is turned to the turning angle, the switch member is operated to disconnect the inner cylinder from the tailpiece. Release.

  As a result, the free inner cylinder further rotates counterclockwise as shown in FIG. 28, and finally the locking bar. 23 is engaged with the operating groove 4 (see FIG. 1).

  Therefore, the inner cylinder B6 moves upward in FIG. 28 by the elasticity of the inner cylinder spring 26 (see FIG. 17), and the protruding tooth rows of the tumbler A9 and the tumbler B21 are separated.

  Then, since the tumbler A9 becomes free, the previous key can be removed in this state, and a new key is inserted into the key hole at the angular position in FIG.

  When a new key is inserted, the tumbler A9 is driven to a position corresponding to the keyway of the new key, and when the new key is turned clockwise in this state, the angle at which the locking bar 23 rides on the inner peripheral surface of the outer cylinder In position, the relative positions of the tumbler A9 and the tumbler B21 are fixed by the engagement of the protruding teeth row, and thus a new key difference is obtained.

  In this case, after the one end switch member is operated to separate the inner cylinder and the tail piece, the connecting pin 34 comes into sliding contact with the inner surface of the inner cylinder so that the hand can be released from the switch member. After the difference is obtained, when the connecting pin 34 is aligned with the first concave portion 35 on the inner cylinder side, the connecting pin 34 falls into this, and thus the inner cylinder and the tail piece 32 are automatically reconnected. Is called.

  On the other hand, in the variable cylinder lock according to the third aspect of the present invention, the operating rod 41 that is prevented from coming off is provided so as to be movable in the axial direction so as to penetrate the outer cylinder in the axial direction. As shown, the outer end is exposed on the outer surface of the outer cylinder.

  Further, since the inner end of the operation rod 41 faces the connection pin 34 so as to be engageable, the key change conversion of the variable cylinder lock can be performed in the mounted state by pushing the operation rod 41.

  Therefore, as shown in FIG. 30, a ring-shaped conversion adapter 42 is fitted into the base of the key 31.

  The conversion adapter 42 is provided with an elongated rectangular engagement hole 43 that fits into the base of the key and an operating projection 44 that pushes the operation rod 41. When the key is inserted into the key hole, the conversion adapter 42 is automatically Thus, the inner cylinder and the tail piece are separated.

  Since the mode of key difference conversion at that time is the same as that of the variable cylinder lock according to the invention described in claim 2, further detailed description is omitted.

  In the sectional view of the variable cylinder lock according to the present invention, the beginning of the rotation of the inner cylinder is shown.   The front view of the inner cylinder A. FIG.   The side view of the inner cylinder A.   The longitudinal cross-sectional view by the vertical surface of the inner cylinder A. FIG.   The longitudinal cross-sectional view by the horizontal surface of the inner cylinder A. FIG.   The bottom view of the inner cylinder A.   Sectional drawing by the VII-VII line of FIG.   Sectional drawing by the VIII-VIII line of FIG.   The rear view of the inner cylinder A. FIG.   The top view of tumbler A. FIG.   Sectional view of tumbler A. FIG.   The top view of the inner cylinder B. FIG.   The front view of the inner cylinder B. FIG.   The side view of the inner cylinder B.   The top view of tumbler B. FIG.   The longitudinal cross-sectional view of the tumbler B. FIG.   The longitudinal cross-sectional view by the vertical surface of the variable cylinder lock by one Example of this invention.   It is sectional drawing of the variable cylinder lock similar to FIG. 1, and shows the state by which the different key was inserted in the keyhole.   FIG. 19 is a cross-sectional view of the variable cylinder lock similar to FIG.   FIG. 19 is a cross-sectional view of a variable cylinder lock similar to that in FIG.   FIG. 21 is a cross-sectional view of a variable cylinder lock similar to that in FIG.   The longitudinal cross-sectional view by the horizontal surface of the variable cylinder lock by one Example of this invention.   FIG.   The side view of the variable cylinder lock by one Example of this invention.   The rear view which removes and shows the tail piece of the variable cylinder lock by one Example of this invention.   The side view on the opposite side to FIG. 24 of the variable cylinder lock by one Example of this invention.   It is sectional drawing similar to FIG. 1, and shows the state which the inner cylinder rotated the rotation angle.   It is sectional drawing similar to FIG. 1, and shows the state which the inner cylinder rotated 180 degree | times.   The front view of the variable cylinder lock by the invention of Claim 3.   FIG.   The side view of the adapter for conversion.   The rear view of the adapter for conversion.

Explanation of symbols

1 Outer cylinder 2 Inner cylinder 3 Cam groove 4 Actuation groove 5 Inner cylinder A
6 Inner cylinder B
7 Keyhole 8 Slot 9 Tumbler A
11 Tumbler spring 12 Spring hook 13 Key insertion hole 14 Projection tooth row 15 Partition block 16 Storage guide part 17 Locking bar storage groove 18 Guide groove 19 Engaging protrusion 21 Tumbler B
22 Unlocking cutout 23 Locking bar 24 Holding groove 26 Inner cylinder spring 28 Locking bar spring 31 Lock key 32 Tail piece 33 Ring bank 34 Connection pin 37 Connection spring 38 Switch member 39 Switch lever 41 Operation rod 42 Conversion adapter 43 Engagement hole 44 Actuation protrusion

Claims (3)

  A cam having an outer cylinder and a V-shaped cross section along the generatrix at one angular position of the inner peripheral surface of the outer cylinder at the inner circumferential surface of the outer cylinder. A groove is formed, and an operating groove is formed at another angular position separated from the cam groove by an angle greater than the rotation angle of the inner cylinder, while the inner cylinder A and the inner cylinder are formed by a plane parallel to the rotation axis. B is divided into B and the keyhole including the rotation axis of the inner cylinder is left 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. The inner cylinder B is guided so as to be movable in the radial direction, and further, the inner cylinder B is urged in a direction away from the inner cylinder A, and on the other hand, a plurality of lines arranged along the rotation axis of the inner cylinder A are arranged. In each of the slots, a plate-like tumbler A having a key insertion hole opened is inserted so as to be movable in the radial direction of the inner cylinder, and each tumbler A is urged in a predetermined direction. A protruding tooth row is formed on the side edge of the tumbler A on the inner cylinder B side, and on the surface facing the inner cylinder A of the inner cylinder B, the same number of tumblers B are moved in the radial direction corresponding to each tumbler A. A dentition row that can be engaged with the dentition row of the tumbler A is formed on the tumbler A side of each tumbler B, and an unlocking notch is formed on the portion opposite to the dentition row of each tumbler B. In addition, on the side facing the inner peripheral surface of the outer cylinder of the inner cylinder B, the outer cylinder extends in the generatrix direction, and the outer side is molded into a V-shaped cross section that can be engaged with the cam groove, and the inner side The locking bar formed with a protrusion that can be engaged with the unlocking notch of the tumbler B is supported so as to be movable in the radial direction of the inner cylinder, and further, the locking bar is moved outward, that is, in the cam groove of the outer cylinder. Energize in the direction of entry, so when inserting the key into the key hole of the inner cylinder, The position of the unlocking notch of each tumbler B determined by the engagement between the key groove of the key and the opening edge of the tumbler A can be aligned with the protrusion of the locking bar. In addition to connecting the ends so that they can rotate relative to each other, a connecting pin that is biased outward is provided so as to straddle the sliding surface. The variable cylinder lock is characterized in that the outer cylinder is provided with a release member for aligning the top of the connecting pin with the sliding surface of the inner cylinder and the tail piece to release the coupling between the inner cylinder and the tail piece.   The release member is a switch member that is connected to a knob member exposed on the outer surface of the outer cylinder, is guided to be movable in the direction of the generatrix in the outer cylinder, and has an inner end that can be engaged with the outer end of the connecting pin. The variable cylinder lock according to claim 1, wherein the variable cylinder lock is provided.   The release member is a switch rod that is guided in the outer cylinder so as to be movable in the generatrix direction, has an inner end that can be engaged with an outer end of the connecting pin, and an outer end that is exposed to the outer end surface of the outer cylinder. The variable cylinder lock according to claim 1.

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