JP4632237B2 - Variable lever tumbler lock - Google Patents

Description

  The present invention relates to a variable lever tumbler lock, and more particularly, to a variable lever tumbler lock that can simplify a key difference conversion operation and convert a key difference without removing a cylinder.

  The present applicant has previously proposed a novel variable lever tumbler lock with Patent Documents 1 to 5 described later.

  In these variable lever tumbler locks, each lever tumbler of the lever tumbler lock is a combination of a tumbler A and a tumbler B, which are superposed on each other in a substantially C shape. The tumbler A, which is supported so as to be able to rotate around the axis of the core shaft and has one end loosely fitted to the support shaft, is formed with an engaging portion with a key groove of the key, and is attached in a direction that interferes with the key. In addition, an unlocking notch is formed at the outer edge of the free end of the tumbler B, one end of which is pivotably fitted to the support shaft, and the engagement portion with the engaging side edge of the tumbler A is overlapped The part to be molded is shaped so as not to interfere with the key, and on the other hand, the engagement protrusion is on the side opposite to the tumbler B on the inner edge of the free end of the tumbler A, and the support shaft is centered on the inner edge of the tumbler B Engagement protrusions of tumbler A on the arc A plurality of possible engaging recesses are formed, and the forming angular positions of the engaging recesses are respectively engaged with the engaging portions of the tumbler A in a plurality of types of key grooves formed on the side edge of the key. When this is done, it is set to align with the engaging projection, and on the other hand, the support shaft is urged outward, while the inner end of the inner cylinder can be moved in the radial direction of the inner cylinder and can be operated from the outside. A simple switch member is provided so as to be able to abut on this from the outside of the support shaft.

  And in order to understand this invention, it is necessary to understand the structure of the said variable lever tumbler lock, Since the structure is described in said each patent document, it demonstrates easily here.

  In FIG. 1, reference numeral 1 denotes a lever tumbler. The lever tumbler 1 is a combination of a tumbler A1A and a tumbler B1B that are superposed on each other in a substantially C shape, and a support shaft biased upward in the figure. 2 is supported so that it can rotate around the axis of an eccentric shaft 3 (see FIG. 2) protruding from both ends thereof.

  In FIG. 1, the tumbler B1B is hatched only so as not to be confused with the tumbler A1A, and is not actually hatched. In FIG. 1, the tumbler B1B is disposed on the near side, and the tumbler A1A is disposed on the back side thereof.

  In addition, the C-shaped tumbler A1A shown in FIG. 1 has its open ends connected to each other, but this is to increase the rigidity of the tumbler. Included in the concept of glyph.

  On the other hand, the tumbler A1A whose one end is loosely fitted to the support shaft 2 through the vertically long escape hole 4 is formed with an engaging portion 7 with the key groove 6 of the key 5 and the direction in which the key 5 interferes therewith. In FIG. 1, an unlocking notch 8 is formed on the outer edge of the free end portion of the tumbler B1B that is urged counterclockwise and is rotatably fitted on one end of the support shaft, and the key of the tumbler A1A is locked. A portion overlapping with the engaging portion 7 with the side edge is molded so as not to interfere with the key.

  On the other hand, the engagement protrusion 9 is formed on the side of the tumbler A1A facing the tumbler B1B at the inner edge of the free end, and the tumbler A is engaged on the inner edge of the tumbler B1B on an arc centered on the support shaft 2. A plurality of engaging recesses 11 that can be engaged with the protrusions 9 are respectively formed, and the formation angular positions of the engaging recesses 11 are tumbled in a plurality of types of key grooves 6 formed at side edges of the key 5. When the engaging portions of A are respectively engaged, the setting is made so as to align with the engaging protrusions.

  FIG. 1 shows a state in which one key is inserted into the keyhole, so that the unlocking notch 8 is angularly aligned with the locking bar 12.

  In this state, as shown in FIGS. 2 and 3, the conversion pin 13 is inserted from the inner end side of the cylinder, and is supported via the switch member 14 and the spacer ring 15 fitted to the inner end of the support shaft 2. When a force in the direction of the arrow, that is, a downward force is applied to the shaft 2, the support shaft 2 rotates around the central axis c of the eccentric shaft 3 in the counterclockwise direction.

  In FIG. 1, since the tumbler 1 is viewed from the inner end side of the cylinder, in FIG. 1, the support shaft 2 rotates around the central axis c in the clockwise direction.

  As a result, the support shaft 2 loosely fits the vertically long escape hole 4 formed at one end of the tumbler A1A, so that only the tumbler B11B is lowered with the tumbler A left in the position of FIG. 1 (not shown). .

  As is clear from FIG. 1, the unlocking notch 8 and the locking bar 12 are angularly aligned, so that the tumbler B1B can be lowered, and the engaging projection 9 of the tumbler A1A is separated from the engaging recess 11. It is removed.

  In this state, one key can be removed, so when one key is removed from the keyhole, the tumbler A1A is rotated counterclockwise in FIG. By inserting the correct key, the tumbler A1A is rotated to a new angular position different from that in FIG.

In this state, when the conversion pin 13 (see FIG. 3) is pulled out and the support shaft 2 is returned to the original position, the tumbler B1B is also moved back to the position shown in FIG. In engaging with the recess, the manner of engagement between the tumbler A1A and the tumbler B1B is different from the previous one, and therefore the key difference can be changed.
JP2003-184366 JP2003-213888 JP2003-307057 JP 2003-314104 A JP 2003-321958 A JP 2005-155195 A

  As shown in FIG. 4, the variable lever tumbler lock having the above-described structure has a bulging portion 17 protruding from the base portion of the outer cylinder 16, and the switch member 14 is placed in the bulging portion 17 in the vertical direction in FIG. A guide cave 18 that can be guided is provided.

  In addition, the bulging part formed below the outer cylinder in FIG. 4 is a bulging part provided because it is necessary for design, and is not an essential component of the variable lever tumbler lock.

  However, the bulging part formed in the outer cylinder complicates the structure of the variable lever tumbler lock because of its existence, and the processing of the outer cylinder becomes troublesome, and in addition, it is disadvantageous in design, etc. Cause inconvenience.

  Accordingly, the present applicant has previously proposed a variable lever tumbler lock that can rationally change the key difference conversion mechanism and eliminate the need to form a bulging portion on the outer cylinder, using Patent Documents 6 to 10 described above. .

  However, in the inventions described in Patent Documents 6 to 10, the cylinder must be removed from the mounting position to perform the key difference conversion operation, and there is still room for improvement in terms of the efficiency of the conversion work.

  Therefore, the present invention provides a variable lever tumbler lock that can further improve the key proposal conversion operation without removing the cylinder from the mounting position, by further improving the inventions proposed by Patent Documents 6 to 10 above. The purpose is to further improve the efficiency of key difference conversion work.

In order to achieve the above-mentioned object, the present invention is a combination of a tumbler A and a tumbler B, which are superposed on each other in a substantially C-shape, in each lever tumbler of the lever tumbler lock, the axis around eccentric axis bearing to allow rotation projecting from the, the engagement portion of the key groove of the master key in a tumbler a obtained by fitting Yu support shaft one end through an oblong relief hole Forming and urging this in a direction that interferes with the key, and receiving a locking bar at the time of unlocking on the outer edge of the free end of the tumbler B with one end pivotably fitted to the support shaft A part that allows the inner cylinder to rotate or accepts a locking bar at the time of key-change conversion to form an unlocking notch that allows the tumbler B to descend, and overlaps with the engaging part of the tumbler A with the key side edge Is molded so as not to interfere with the key. Engagement protrusions on the inner edge of the tumbler A facing the tumbler B, and engagement edges of the tumbler B on the inner edge of the tumbler B on an arc centering on the support shaft A plurality of possible engaging recesses are formed, and the forming angular positions of the engaging recesses are respectively engaged with the engaging portions of the tumbler A in a plurality of types of key grooves formed on the side edge of the key. In this case, in the one set so as to be aligned with the engaging projection, the innermost end partition plate of the inner cylinder in which a plurality of the lever tumblers are connected in the keyhole axial direction is used as the first connecting plate and the inner cylinder. The flange portion of the joint with flange that is connected to the inner end and transmits the rotation of the inner cylinder to the locking member is designated as the second connecting plate, and the first and second connecting plates face each other. The first and second couplings are engaged with each other in a coaxial and relatively rotatable manner. A plug housing recess is formed on the outer periphery of the joint portion facing each other so as to straddle the joint portion, and the connecting plug urged outward is accommodated in the plug storage recess so as to be slidable in the axial direction of the keyhole. In the normal state, the connecting device and the rod-like body extending in the axial direction of the keyhole are guided to be movable in the length direction in the first guide groove formed in the generatrix direction on the inner peripheral surface of the outer cylinder. A switch bar with the outer end exposed on the outer surface of the key guide of the inner cylinder and the inner end facing the connecting plug, and an annular body detachably mounted near the knob of the key. And a release device that has a projection that aligns with the switch bar when inserted in the guide, and that guides the projection so that it can freely move around the body portion of the key, and passes through the first connection plate to the second connection plate side. It hangs down from the inner end of the protruding spindle and protrudes toward the second connecting plate at the tip. An operating arm having a guide pin implanted therein, a second guide groove forming a part of an arc formed on the outer surface of the second connecting plate so as not to interfere with the guide pin, and a leading end of the second guide groove. A guide groove provided with a third guide groove for guiding the guide pin in the direction of the key hole center axis, and formed along the generatrix on the inner peripheral surface of the outer cylinder at an angular position symmetrical to the cam groove with respect to the key hole center axis. By inserting the key with the release device into the key hole, the switch bar is moved inward by the protrusion, and the connecting plug is pushed toward the second connecting plate by the inner end. The first connecting plate is uncoupled from the first connecting plate, and the first connecting plate is rotated independently of the second connecting plate, so that the guide pin is guided in the guide groove, and the key is unlocked. When the locking bar is dropped into the operating groove by turning in the locking direction To, by rotating the shaft about its eccentric axis, characterized in that so as to disengage the engaging projection and the engaging recess of the tumbler B tumbler A.

  In the variable lever tumbler lock according to the present invention configured as described above, the first and second connecting plates are restrained in the rotating direction by the connecting plug in a normal use state. Therefore, the tumbler A and the tumbler B are integrally and fixed at a predetermined angular interval.

  For this reason, the key difference is fixed, and the locking / unlocking operation can be performed without any trouble by the combined key corresponding to the key difference.

  When changing the key difference, the first key and the second connection plate are uncoupled by inserting the key with the release device into the key hole to cause the relative rotation of the first and second connection plates. Along with the rotation, rotation control of the guide pin of the support shaft by the guide groove starts, and further rotation of the key lock rotates the support shaft around the eccentric shaft and drops the locking bar into the operation groove. Disengage the tumblers A and B, then remove the previous key, insert a new key, and rotate the inner cylinder in the opposite direction to engage the tumblers A and B in a new angular position relationship. Can be made.

  Therefore, the key difference of the lever tumbler lock can be converted by operating only from the outer surface side where the keyhole is exposed, without removing the cylinder from the mounting position or unlocking the wing and exposing the back side of the lever tumbler lock. And the efficiency of the key conversion process can be remarkably improved.

  Further, since the engagement between the guide groove and the guide pin forms a so-called positive cam, the rotation of the support shaft around the eccentric shaft, and the separation and re-engagement of the tumblers A and B are reliably performed. Also play.

  Since a guide groove for controlling the connecting device and the guide pin of the support shaft is added to the conventional variable lever tumbler lock with a simple mechanism, the key difference of the lever tumbler lock is converted only by operating from the outer surface side where the keyhole is exposed. And key difference conversion work has been made extremely easy.

Embodiments of the present invention will be described below with reference to FIGS.
In FIG. 5, the code | symbol 19 shows the 1st connection plate as a partition plate of the innermost end of a lever tumbler lock, and the code | symbol 22 shows the 2nd connection plate as a flange part of a joint, respectively.

  As shown in FIGS. 6 and 8, the first connecting plate 21 has a substantially circular outer shape inscribed in a circle. As shown in FIG. 6, the first connecting plate 21 has an inner end of the key hole 23 at the center of the outer surface. A bottom recess is formed.

  On the other hand, as shown in FIGS. 9 to 11, in the illustrated embodiment, the joint 21 is formed as a short cylinder with a flange, and the flange is designated as the second connecting plate 22 as described above. It is.

  A circular recess is formed on the outer surface of the second connecting plate 22, that is, the key guide 24 (see FIG. 5) side of the inner cylinder, and this unnumbered recess is coaxial with the nineteenth, And it fits so that rotation is possible.

  Accordingly, the first and second connecting plates 19 and 22 are coaxially and rotatably engaged with their opposing surfaces joined to each other.

  On the other hand, as shown in FIGS. 6, 8, 9, and 11, the outer peripheral edge portions of the first and second connecting plates 19 and 22 that face each other are viewed from the key guide 24 and converted to the clock face. Thus, U-shaped plug housing recesses 25 are formed at the 10:30 angle position so as to straddle the joint surface.

  As shown in FIG. 12, a connecting plug 26 is fitted in the plug housing recess 25 so as to be slidable in the keyhole axis direction (paper surface direction).

  As shown in FIGS. 13 and 14, the connection plug 26 has a substantially U-shaped projection toward the connection plate, and a spring hole 27 is opened on the second connection plate side.

  The connecting plug 26 straddles the joint portion of the first and second connecting plates by the elasticity of the plug spring 28 (see FIG. 5) as a compression coil spring, for example, elastically mounted in the spring hole 27. Thus, the pressure is pressed toward the plug housing hole on the first connecting plate 19 side.

  Therefore, in a state where no external force is applied to the connection plug 26, the first and second connection plates 19 and 22 are constrained in the circumferential direction via the connection plug 26, and a joint key is inserted into the key hole. When turned in the locking direction, the joint 1 transmits the rotation of the inner cylinder to the locking member to unlock it.

  The first and second connecting plates and the connecting plug 26 constitute an unnumbered connecting device.

  In order to control this connecting device from the outside, as shown in FIG. 23, the cross-section is rectangular on the inner peripheral surface of the outer cylinder 16 when viewed from the outside and converted to the clock face at an angular position of 10:30. A first guide groove 29 is formed.

  And in this 1st guide groove 29, the cross-sectional shape is an elongate rectangle, for example, and as shown in FIG.15 and FIG.16, the long rod-shaped switch bar 31 is accommodated and guided so that it can slide to a length direction. .

  The switch bar 31 is curved so that the outer end (the left end in FIG. 15) is slightly inward, and in the normal state, that is, during normal use, the outer end is arranged as shown in FIG. In the outer periphery of 24, it is exposed at an angle position of 10:30 in terms of a clock face.

  Further, the inner end of the switch bar 31 protrudes out of the first connecting plate 19 of the connecting plug 26 so as to give up the first connecting plate 19 (see FIG. 12) so as to come into contact with the outer end portion. ing.

  On the other hand, in order to control the switch bar 31 described above, a release device 32 is attached to the base portion of the body portion of the key 5 as shown in FIGS.

  The release device 32 in the illustrated embodiment has an elongated rectangular insertion hole that fits into the base of the key 5, and has a thick disk-shaped holding block 33 and an outer periphery of the holding block 33. And an annular release ring 34 that is rotatably fitted in the circumferential direction. The release ring 34 is viewed from the key picking direction of the release ring 34 and is converted into a clock face at an angle position of 10:30. The protrusion 35 is provided so as to protrude toward the distal end of the key.

  In addition, in the holding block 33 of the release device in the illustrated embodiment, a click device that keeps the angular position of the protrusion 35 metastable is built in, as is particularly apparent in FIG.

  However, although the coupling between the holding block 33 and the key is strong, the mode of engagement between the holding block 33 and the release ring 34 via the click device is not strong, and the holding block 33 and the release ring 34 are not firmly engaged. If the click engagement is disengaged, the latter can independently rotate around the former.

  On the other hand, as shown in FIGS. 21 and 22, a short operation arm 36 is provided at the inner end (right end in FIG. 21) of the support shaft 2, and protrudes toward the second connecting plate 22 at the tip. Guide pins 37 are integrally planted.

  In the support shaft 2 configured as described above, the eccentric shaft 3 at the outer end serves as the key guide 24, and the eccentric shaft at the inner end serves as the eccentric shaft hole 38 of the first connecting plate 19 (see FIGS. 6 and 8). ) To be fitted from the outer surface side to the inner cylinder.

  As shown in FIG. 6, a recess 39 does not interfere with the guide pin 37 around the eccentric shaft hole 38 on the outer surface side of the first connecting plate 19 in order to avoid interference with the operating arm 36. Each of them is formed with a relief groove 41 forming a part of an arc.

  And the front-end | tip part of the guide pin 37 which protruded in the 2nd connection board 22 direction from the back surface of the 1st connection board 19 through the said relief groove 41 is the guide groove 42 ( 9).

  As shown in FIG. 9, the guide groove 42 is formed in a circular arc shape with a second guide groove 43 having an angle of about 135 degrees with respect to the central axis, and a leading end (lower end in FIG. 9) of the second guide groove 43. And a third guide groove 44 for guiding the guide pin 37 in the central axis direction.

  Further, as shown in FIG. 23, the outer circumferential surface of the outer cylinder is inclined at both sides along the generatrix at an angular position symmetrical to the known cam groove 45 engaged with the locking bar 12 with respect to the key hole center axis. An operating groove 46 having a surface is formed.

  In the variable lever tumbler lock according to one embodiment of the present invention configured as described above, since the connecting plug 26 normally connects the first and second connecting plates 19 and 22 together, the key is inserted. During all normal locking / unlocking operations, the joint 21 (see FIG. 5) rotates integrally with the inner cylinder.

  On the other hand, when changing the key difference, as shown in FIG. 18 to FIG.

  Then, the projection 35 pushes the switch bar 31 inward, its inner end pushes the connecting plug 26 toward the joint 21, and the outer surface of the connecting plug 26 is the first and second connecting plates 19, 22. Align with the joint surface.

  23 shows this state from the key guide 24 (see FIG. 5). At this time, the guide pin 37 of the support shaft is located at the start end of the guide groove.

  Next, when the key is rotated, for example, clockwise (the unlocking direction), as shown in FIG. 24, the inner cylinder 47 also rotates in the same direction as the key, and the locking bar 12 is released from the cam groove 45. As a result, the guide pin 37 enters the joint between the second and third guide grooves 43 and 44 when the rotation angle of the inner cylinder 47 approaches 180 degrees.

  At the same time, as shown in FIG. 25, the locking bar 12 enters the working groove 46, and the support shaft 2 rotates around the eccentric shaft 3. As a result, the tumbler B1B moves radially outward leaving the tumbler A1A. .

  Then, the engaging projection 9 of the tumbler A1A is released from the engaging recess 11 that has been fitted so far, and the tumbler A1A becomes free.

  Then, when the inner cylinder 47 further rotates and the rotation angle reaches 180 degrees, the previous key is removed as shown in FIG. As described above, since the tumbler A1A can be freely rotated, the above-mentioned key can be removed.

  When a new key is inserted into the key hole 23 in the state shown in FIG. 26, the tumbler A1A is rotated to an angular position corresponding to the new keyway, and the engaging protrusion 9 also takes a new angular position.

  When the previous key is removed, the switch bar 31 and the connection plug 26 (see FIGS. 12 and 15) are also released from the protrusion 35 of the key, but at this time, the outer surface of the connection plug 26 is the smoothness of the first connection plate 29. Since it abuts against the back surface, there is no hindrance to the subsequent rotation of the inner cylinder.

  Thereafter, when a new key is turned and the inner cylinder 48 is rotated counterclockwise, the locking bar 12 slides up the operating groove 46 and moves in the keyhole axis direction as shown in FIGS. The engaging recess 11 of the tumbler B1B engages with the tumbler A1A at the new angular position, and thus a new key difference is obtained.

  At the same time, the guide pin 37 returns to the starting end of the guide groove 42 as shown in FIG.

The expanded cross-sectional view which shows an example of the support mechanism of the conventional variable lever tumbler lock. It is an expansion external appearance perspective view which shows the drive mechanism of the spindle by a switch member, and shows a normal state. FIG. 3 is an enlarged external perspective view showing a driving mechanism of a support shaft by a switch member similar to that in FIG. The partial cross section side view of the conventional variable lever tumbler lock. The side view which cuts and shows the variable lever tumbler lock by one Example of this invention vertically. The external view of a 1st connection board. Sectional drawing of a 1st connection board. The rear view of a 1st connection board. The external view of a 2nd connection board. Sectional drawing of a 2nd connection board. The rear view of a 2nd connection board. The rear view of a 1st connection board shows the state which inserted the connection plug in the plug storage recessed part. Sectional drawing of a connection plug. The rear view of a connection plug. The side view of a switch bar. The external view of a switch bar. The front view of a lever tumbler lock. The top view of the key with which the cancellation | release apparatus was mounted | worn. FIG. 4 is a vertical side view of a combined key equipped with a release device. The front view seen from the front-end | tip of the key with which the cancellation | release apparatus was mounted | worn. The vertical side view of a spindle. The front view of the back side of a spindle. FIG. 2 is an enlarged cross-sectional view of a variable lever tumbler lock similar to FIG. 1 showing a main part of the present invention, and shows a normal state or an initial state at the time of key difference conversion. FIG. 2 is an enlarged cross-sectional view of a variable lever tumbler lock similar to that in FIG. 1 showing the main part of the present invention, showing the middle cylinder turning during key difference conversion. FIG. 2 is an enlarged cross-sectional view of a variable lever tumbler lock similar to FIG. 1 showing the main part of the present invention, showing a state near the end of rotation of the inner cylinder for key difference conversion. FIG. 2 is an enlarged cross-sectional view of a variable lever tumbler lock similar to FIG. 1 showing the main part of the present invention, showing a state where the inner key is turned after the inner cylinder is turned 180 degrees.

Explanation of symbols

1 Lever Tumbler 1A Tumbler A
1B Tumbler B
2 Support shaft 3 Eccentric shaft 4 Escape hole 5 Joint key 6 Key groove 7 Engagement portion 8 Unlock notch 9 Engagement projection 11 Engagement recess 12 Locking bar 13 Conversion pin 14 Switch member 15 Large diameter flange 16 Outer cylinder 19 First 1 connecting plate 21 joint 22 second connecting plate 23 key hole 24 key guide 25 plug housing recess 26 connecting plug 27 spring hole 28 plug spring 29 first guide groove 31 switch bar 32 release device 33 holding block 34 release ring 35 projection 36 operation Arm 37 Guide pin 38 Eccentric shaft hole 39 Recess 41 Relief groove 42 Guide groove 43 Second guide groove 44 Third guide groove 45 Cam groove 46 Actuation groove 47 Inner cylinder

Claims (1)

Each lever tumbler of the lever tumbler lock is a combination of tumbler A and tumbler B, which overlap each other in a substantially C shape, and the support shaft rotates around the axis of the eccentric shaft protruding from both ends. and bearing to allow movement, so as to form an engaging portion of the key groove of the master key in a tumbler a obtained by fitting Yu support shaft one end through an oblong relief hole, which the master key and interferes direction Energized, and accepts a locking bar at the outer edge of the free end of the tumbler B, one end of which is pivotably fitted to the support shaft, to allow the inner cylinder to rotate, or the key is different An unlocking notch that accepts the locking bar at the time of conversion and allows the tumbler B to descend is formed, and a portion that overlaps with the engaging portion of the tumbler A with the key side edge is molded so as not to interfere with the key, Tumbler on the inner edge of the free end of tumbler A Engagement protrusions are formed on the side facing the roller B, and a plurality of engagement recesses that can be engaged with the engagement protrusions of the tumbler A are formed on the inner edge of the tumbler B on an arc centered on the support shaft. In addition, when the engaging portion of the tumbler A is engaged with a plurality of types of key grooves formed on the side edge of the key, the angle of formation of the engaging recess is aligned with the engaging protrusion. In this configuration, the innermost partition plate of the inner cylinder in which a plurality of the lever tumblers are connected in the keyhole axial direction is connected to the first connecting plate and the inner end of the inner cylinder, and the inner cylinder is rotated. The flange portion of the joint with flange that transmits the movement to the locking member is designated as the second connecting plate, and the first and second connecting plates are engaged with each other so as to be coaxial and relatively rotatable. On the other hand, the first and second connecting plates are joined to each other on the outer peripheral edge of the joining portion facing each other. A plug housing recess is formed so as to straddle, and a connecting device that houses a connecting plug biased outward in the plug housing recess so as to be slidable in the keyhole axial direction, and extends in the keyhole axial direction The rod-shaped body is guided by the first guide groove formed in the generatrix direction on the inner peripheral surface of the outer cylinder so as to be movable in the length direction, and normally, the outer end is exposed to the key guide outer surface of the inner cylinder, A switch bar with the inner end facing the connection plug and a ring body that is detachably mounted near the knob of the key, and has a protrusion that aligns with the switch bar when the key is inserted into the key hole. And a release device that guides the protrusion so that it can freely move around the main body of the key, and an inner end of the support shaft that passes through the first connection plate and protrudes toward the second connection plate. An actuating arm in which a guide pin protruding toward the second connecting plate is implanted; A second guide groove that forms part of an arc formed on the outer surface of the second connecting plate so as not to interfere with the guide pin, and is connected to the tip of the second guide groove, and guides the guide pin in the axial direction of the keyhole center A guide groove provided with a third guide groove, and a working groove formed along the generatrix on the inner peripheral surface of the outer cylinder at an angular position symmetrical to the cam groove with respect to the key hole center axis. Is inserted into the key hole, the switch bar is moved inward by the protrusion, and the connecting plug is pushed toward the second connecting plate by the inner end thereof, so that the first and second connecting plates The locking bar is actuated by releasing the coupling, rotating the first connecting plate independently of the second connecting plate, guiding the guide pin in the guide groove, and turning the key in the unlocking direction. Drop into the groove and rotate the spindle around its eccentric shaft Variable lever tumbler lock, characterized in that so as to disengage the engaging recess of the engagement projection and tumbler B tumbler A.

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