JP2007023692A - Cylinder lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a cylinder lock capable of changing an exclusive key by easy change works at a low cost without exchanging the whole cylinder lock. <P>SOLUTION: The cylinder lock has an internal cylinder 19 internalized to an external cylinder 15 and a bar housing groove 41 formed to the outer peripheral surface of the internal cylinder 19. The cylinder lock further has a locking bar 43 being projected and arranged from the bar housing groove 41 and preventing the rotation of the internal cylinder 19 and a tumbler 23 being fitted to the internal cylinder 19 and being capable of retracting the locking bar 43 into the bar housing groove 41 by the coincidence of the bar-penetration recessed section 53. The tumbler 23 is composed of a first tumbler 23A and a second tumbler 23B. These tumblers 23A and 23B can be connected at different places by connecting means 55 and 57. Connections can be released by the first tumbler 23A following a movable block 29 moved by inserting and rotating a changing key in this case, and these tumblers 23A and 23B are connected selectively at places corresponding to the arbitrary exclusive keys inserted within a set rotational-angle range. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cylinder lock that enables a key change of a use key (dedicated key, master key) by changing a combination of tumblers.

  There are tumbler type cylinder locks used in rental apartments and apartments, and the tumbler type cylinder locks further include pin tumbler type. The pin tumbler-type cylinder lock has an outer cylinder and an inner cylinder that is rotatable with respect to the outer cylinder, and the outer cylinder and the inner cylinder are provided with pin insertion holes. This pin insertion hole accommodates a driver pin in the outer cylinder side pin insertion hole and a tumbler pin in the inner cylinder side pin insertion hole, and the key is inserted into the key hole of the inner cylinder so that it matches the key groove of the key. As a result, the boundary between the tumbler pin and the driver pin coincides with the boundary between the outer periphery of the inner cylinder and the inner periphery of the outer cylinder, that is, the shear line, so that the inner cylinder rotates relative to the outer cylinder. It becomes possible to be locked and unlocked. On the other hand, if a key that is not a key is inserted, the tumbler pin is not arranged at a normal position, so that the driver pin or the tumbler pin crosses the shear line, thereby preventing the rotation of the inner cylinder.

By the way, in rental apartments and apartments, tenants may change, and if the old tenant owns a duplicate of the joint key, the old tenant's key can not be used due to the crime prevention of the new tenant. It is desirable to do.
However, in the above-described pin tumbler type cylinder lock, in order to be able to use only another dedicated key, a pin tumbler and a driver pin having different configurations must be incorporated, and the change cannot be easily performed. In addition, there was a problem that if the cylinder lock was changed every time the occupant changed, a great expense had to be borne.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cylinder lock capable of changing a dedicated key at a low cost and with an easy change operation without replacing the entire cylinder lock.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The cylinder lock 100 according to claim 1 of the present invention includes an outer cylinder 15,
An inner cylinder 19 which is rotatably accommodated in the outer cylinder 15 and has a key hole 17 into which a dedicated key, a master key or a change key is inserted at one end face and a tail piece 73 which is connected to a lock mechanism at the other end face; ,
A bar receiving groove 41 formed in the axial direction on the outer peripheral surface of the inner cylinder 19;
It is accommodated in the bar accommodating groove 41 so as to protrude from the outer peripheral surface, and is disposed so as to protrude from the outer peripheral surface, so that it enters a lock groove 49 formed in the inner periphery of the outer cylinder 15 and A locking bar 43 that prevents rotation of the cylinder 19;
A plurality of key projections 59 are inserted into the key groove 21a of the key 21 accommodated in the inner cylinder 19 in the axial direction and inserted into the key hole 17, so that the bar entering recess 53B is slid in the direction orthogonal to the axis of the inner cylinder 19. A cylinder lock 100 comprising: a tumbler 23 that matches the locking bar 43 and enables the locking bar 43 to be retracted into the bar receiving groove 41;
The change key 69 that allows the inner cylinder 19 to rotate within a predetermined set rotation angle range that exceeds the lock / unlock operation rotation range of the dedicated key and the master key;
A movable block 29 accommodated in the inner cylinder 19 and movable in the axial direction within the predetermined set rotation angle range of the inner cylinder 19;
The tumbler 23 has the bar entry recess 53A that allows the locking bar 43 to be immersed, and the first tumbler 23A accommodated in the movable block 29, and the bar entry recess that also allows the locking bar 43 to be immersed. 53B, the second tumbler 23B having the key protrusion 59 that enters the key groove 21a and housed in the inner cylinder 19 outside the movable block,
The first tumbler 23A and the second tumbler 23B can be selectively connected at a plurality of different positions in the sliding direction by connecting means 55 and 57, and the connection follows the movement of the movable block 29. Selection can be made at different positions according to any dedicated key 71 that can be released by the movement of the first tumbler 23A in the axial direction and that is inserted in the predetermined set rotation angle range and reversely rotated to the locking / unlocking operation rotation range. It is characterized in that it is reconnected.

  In the cylinder lock 100, the first tumbler 23A and the second tumbler 23B are connected to a predetermined relative position when the first key 21 is in use, and the key protrusion 59 is inserted when the first key 21 is inserted. Thus, the bar entry recesses 53A and 53B are arranged at positions where the backward movement of the locking bar 43 is allowed. That is, by inserting the first key 21, the locking bar 43 enters the bar entry recesses 53 </ b> A and 53 </ b> B of the tumbler 23, and thereby the locking bar 43 moves backward from the lock groove 49 of the outer cylinder 15, so The cylinder 19 can be rotated. In order to make this cylinder lock 100 exclusive for the second key 71, a change key 69 is inserted. When the change key 69 is inserted and the inner cylinder 19 is rotated to a predetermined set rotation angle range, the movable block 29 is moved in the axial direction, and accordingly, the first tumbler 23A is also moved. Due to the movement of the first tumbler 23A, the connection by the connecting means 55 and 57 is released, and the second tumbler 23B is slidable in the direction perpendicular to the axis with respect to the first tumbler 23A. When the change key 69 is removed in this state and the second key 71 is inserted, the key protrusion 59 of the second tumbler 23B is moved to a position that matches the key groove 71a of the second key 71. In this state, when the inner cylinder 19 is reversely rotated from the predetermined set rotation angle range to the locking / unlocking operation rotation range, the movable block 29 moves again in the axial direction and returns to the original position. When the movable block 29 returns to the original position, the first tumbler 23A and the second tumbler 23B are again connected by the connecting means 55 and 57. That is, the position of the second tumbler 23 </ b> B is changed at a position corresponding to the second key 71. As a result, even after the second key 71 is pulled out, the first key 21 becomes unusable and the second key 71 can be used as a dedicated key.

  The cylinder lock 100 according to claim 2, wherein the first tumbler 23 </ b> A is disposed on the reset bar 63 arranged on the movement trajectory in the sliding direction when the connection with the second tumbler 23 </ b> B is released by the movement in the axial direction. Thus, the urging means 52 is urged in one direction in the sliding direction and is held at a position allowing the locking bar 43 to be immersed.

  In the cylinder lock 100, the first tumbler 23A is always urged in one of the sliding directions by the urging means 52, and the second tumbler 23B released from the connection with the first tumbler 23A is in the sliding direction. Become free. The position of the first tumbler 23A is held by the reset bar 63 together with the urging means 52, and the position is a position that allows the locking bar 43 to be immersed, that is, the first and second tumblers 23A and 23B are located at different positions. It becomes the reference position when connecting with. Thereafter, the first and second tumblers 23A and 23B are connected to each other.

  The cylinder lock 100 according to claim 3 is configured such that the transition of the inner cylinder 19 to the predetermined set rotation angle range is performed by inserting the change key 69 longer than the dedicated key and the master key. It is possible to release the engagement between the piece 73 and the inner cylinder 19.

  In this cylinder lock 100, the change key 69 is formed longer than the dedicated keys 21, 71 and the master key, and only when the change key 69 is inserted, the inner cylinder 19 can be shifted to the set rotation angle range. It becomes. Then, when the inner cylinder 19 is rotated to the set rotation angle range, the engagement between the tail piece 73 and the inner cylinder 19 is released, and the tail piece 73 and the inner cylinder 19 can be rotated relative to each other.

The cylinder lock 100 according to claim 4 is configured to be movable in the axial direction of the inner cylinder 19, and a cons bar 33 penetrating the plurality of second tumblers 23B.
At least one second tumbler 23B penetrating through the cons bar 33 is engaged with the step bar 81 with the cons bar 33 so that the bar entry recess 53B coincides with the locking bar 43, while the cons bar 33 The suspension tumbler 23Ba in which the engagement of the stepped portion 81 is released by the movement in the axial direction and is slid in the direction perpendicular to the axial line of the inner cylinder 19 so that the bar entry recess 53B does not coincide with the locking bar 43;
A construction key 75 that is inserted into the key hole 17 and matches the bar entry recess 53B of the tumbler 23Bb other than the pause tumbler 23Ba with the locking bar 43;
The inner cylinder 19 is accommodated in the inner cylinder 19 so as to be slidable in the direction orthogonal to the axis of the inner cylinder 19 between the second tumblers 23 </ b> B, and the dedicated key or the master key is inserted into the key hole 17. A cons partition plate 79 that is slid in the direction orthogonal to the axis line and is disengaged from the cons bar 33 by the slide to move the cons bar 33 in the axial direction;
It is characterized by comprising.

  In the cylinder lock 100, when the construction key 75 is used, when the construction key 75 is inserted into the key hole 17, only the tumbler 23Bb other than the pause tumbler 23Ba is operated, and the cylinder lock 100 can be locked and unlocked. On the other hand, once the normal use key (dedicated key, master key) 21 is used after the completion of construction, the cons partition plate 79 is moved and the engagement with the cons bar 33 is released. The cons bar 33 released from the engagement with the cons partition plate 79 is moved in the axial direction. When the cons bar 33 is moved, the engagement between the cons bar 33 and the resting tumbler 23Ba is released, and the resting tumbler 23Ba in which the bar entry recess 53B has been aligned with the locking bar 43 until then is moved to the locking bar by the disengagement movement. 43. That is, the pause tumbler 23Ba, which has been paused until now, starts functioning when the normal use key 21 is used, and cannot be locked or unlocked by the construction key 75.

According to the cylinder lock of the first aspect of the present invention, the connection between the first tumbler and the second tumbler is released by inserting a change key and rotating the inner cylinder to a predetermined set rotation angle range, In that state, after removing the change key, insert an arbitrary dedicated key and reversely rotate to the locking / unlocking operation rotation range, so that the first tumbler and the second tumbler can be combined in different combinations according to the arbitrary dedicated key. It can be connected by changing to the arrangement. As a result, the first key can be changed to the second key. As a result, it is possible to change the key without exchanging the cylinder lock and without spending a great deal of money. Further, since the lock can be changed only by inserting a new key to be used into the key hole, the changing operation can be performed very easily. Therefore, when a resident changes in a rental apartment or the like, the key (joint key) used by the old resident can be disabled.
In addition to this, the first key (original key) can be changed to the second key usable state by using the change key and the second key (new key) without using the first key (original key). Even if it is lost, it can be changed.
Similarly, it is possible to change the master key that can be used in common for each cylinder lock of each dedicated key. It is possible to perform group management with the master key, that is, it is possible to cope with a change of managers.

  According to the cylinder lock of claim 2, the first tumbler is held by the reset bar together with the urging means, and the position thereof is a position allowing the locking bar to be immersed, whereby the first and second tumblers It is possible to obtain a reference position for connecting the two at different positions.

  According to the cylinder lock of the third aspect, it is possible to shift to the set rotation angle range by inserting a change key longer than the dedicated key and the master key and releasing the engagement between the tail piece and the inner cylinder. Therefore, the engagement / disengagement mechanism that selectively switches between the engagement state in which the tailpiece and the inner cylinder rotate integrally and the engagement release state in which the tailpiece and the inner cylinder can rotate relative to each other can be easily performed with a simple structure. Can be configured. Further, since the change key is long, it can be easily distinguished from other normal use keys (dedicated key, master key), and key management can be facilitated.

  According to the cylinder lock of claim 4, since the cons bar, the pause tumbler, the construction key, and the cons partition plate are provided, when the construction key is used, only the tumbler other than the pause tumbler is operated by the construction key. The cylinder lock can be locked and unlocked, but once the construction is complete, once the normal use key (dedicated key, master key) is used, the cons partition plate is moved and the engagement with the cons bar is released. The cons bar is moved in the axial direction. By this movement of the cons bar, the engagement between the cons bar and the resting tumbler is released, and the resting tumbler in which the bar entry recess has been matched with the locking bar until then is made inconsistent with the locking bar by the movement due to the disengagement. That is, the function of the pause tumbler that has been paused until now can be started by using the normal use key. As a result, it is possible to lock and unlock with only the normal use key, disable the use of the construction key, and ensure crime prevention.

DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a cylinder lock according to the present invention will be described in detail with reference to the drawings.
1 is an external perspective view showing a cylinder lock according to the present invention together with a normal use key and a construction key, FIG. 2 is a sectional view in a direction perpendicular to the key insertion direction of the cylinder lock shown in FIG. 2 is an exploded view, FIG. 4 is a cross-sectional view taken along a plane including the axis of the cylinder lock shown in FIG. 1, and FIG. 5 is an exploded view of FIG.
The cylinder lock 100 according to the present embodiment is attached to the outdoor surface of the door, and the outer periphery of the lock body 13 excluding the front end surface is covered with a decorative ring 11 as shown in FIG. The lock body 13 is roughly divided into an outer cylinder 15 fixed to a door or a lock box, and an inner cylinder 19 having a key hole 17 on the front end surface and rotatably installed in the outer cylinder 15. Is done.

  The key hole 17 of the inner cylinder 19 is inserted with, for example, a first dedicated key 21 which is the first key of the first resident of the rental house. The cylinder lock 100 is inserted into the outer cylinder by the first dedicated key 21. 15 can be rotated, that is, can be locked and unlocked. The cylinder lock 100 according to the present embodiment is changed from a usable state by the first dedicated key 21 to a usable state of another new key (for example, a second key described later) by using a change key described later. The mechanism can be easily changed. In FIG. 1, a construction key (hereinafter also referred to as “consky”) 75 is shown. This consky 75 makes it possible to lock and unlock the cylinder lock 100 during the construction period. As will be described in detail later, the cylinder lock 100 according to the present embodiment is used by the consky 75 once the normal use key (for example, the first dedicated key 21) is once used from the use state of the consky 75. It has a function that makes locking and unlocking operations impossible.

  As shown in FIG. 2, a slide tumbler 23 is accommodated in the inner cylinder 19. A plurality of slide tumblers 23 are accommodated in parallel in the axial direction of the inner cylinder 19. For convenience of explanation, the slide tumblers 23 have substantially the same configuration, and one of them will be described as an example.

  A pair of bar receiving grooves 41, 41 extending in the axial direction are formed on the outer periphery of the inner cylinder 19 symmetrically with respect to the axis, and a locking bar 43 is received in the bar receiving groove 41. As will be described in detail later, the locking bar 43 is locked or unlocked depending on the relative positional relationship with the plurality of tumblers 23. The front end of the locking bar 43 is a pointed head 45 and the rear end is a tumbler engaging plate portion 47. The locking bar 43 is adapted to engage with a locking groove 49 formed in the axial direction on the inner periphery of the outer cylinder 15 when the pointed head 45 projects from the bar receiving groove 41. The inner cylinder 19 is prevented from rotating when the pointed head 45 of the locking bar 43 enters the lock groove 49. Further, the locking bar 43 is unlocked from the outer cylinder 15 when the pointed head 45 is retracted into the bar accommodating groove 41. Thereby, the inner cylinder 19 becomes rotatable.

  In a state where the locking bar 43 is immersed in the bar receiving groove 41, the tumbler engaging plate portion 47 protrudes into the tumbler receiving space 51 formed inside the inner cylinder 19. The tumbler accommodating space 51 accommodates the tumbler 23 described above, and the tumbler 23 is accommodated so as to be slidable in the direction perpendicular to the axis of the inner cylinder 19 (left and right direction in FIG. 2). The tumbler 23 includes a first tumbler 23A and a second tumbler 23B.

  The first tumbler 23A is formed with a bar entry recess 53A made of unevenness on the upper side in the drawing on the radially outer side. Further, a bar entry recess 53B having a shape different from that of the bar entry recess 53A is formed in the lower side portion in the drawing on the radially outer side of the second tumbler 23B. A row tooth portion 55 composed of a plurality of teeth extends in the tumbler slide direction (left and right direction in FIG. 2) on the lower side portion of the first tumbler 23A. On the upper side of the second tumbler 23B, row tooth portions 57 made of a plurality of teeth that mesh with the row tooth portions 55 of the first tumbler 23A are extended in the tumbler slide direction (left-right direction in FIG. 2). These row tooth portion 55 and row tooth portion 57 constitute a connecting means. Further, the second tumbler 23B is formed with a through hole communicating with the key hole 17, and a key protrusion 59 protruding into the key hole 17 is provided on a side portion on the radially outer side opposite to the bar entry recess 53B. As shown in FIG. 7, the key protrusion 59 enters the key groove of the key inserted into the key hole 17, for example, the key groove 21a of the first dedicated key 21 as shown in FIG.

  The first tumbler 23A and the second tumbler 23B are connected to each other so that the row tooth portion 55 and the row tooth portion 57 are engaged with each other at any relative slide position, and the relative movement is impossible. In this manner, the bar entry recess 53A and the bar entry recess 53B are directed toward the tumbler engagement plate portion 47 side of the locking bar 43, while the key protrusion 59 is projected into the key hole 17.

  Between the inner cylinder 19 and the respective locking bars 43, 43, a pair of urging means, coil springs 62, 62 shown in FIG. 4 are disposed. The coil springs 62, 62 connect the locking bars 43, 43 to the inner cylinder. 19 is urged radially outward.

  As shown in FIG. 2, the first tumbler 23 </ b> A is urged leftward in FIG. 2 by a tumbler urging spring 52 as urging means provided in the tumbler housing space 51. Accordingly, the second tumbler 23 </ b> B connected by the row teeth 55 and the row teeth 57 is also urged in the same direction. When the key (first dedicated key 21) is not inserted as described above, the tumbler 23 is slid by the tumbler biasing spring 52, so that the bar entry recess 53A and the bar entry recess 53B are tumblers of the locking bar 43. This does not coincide with the engagement plate portion 47, and the inner cylinder 19 cannot be rotated.

  As shown in FIG. 5, a plurality of concave grooves 25a, 25b are formed alternately in the axial direction at the bottom of the inner cylinder 19, and the concave grooves 25a accommodate the second tumbler 23B, and the concave grooves 25b are shown in FIG. The partition plate 27 is accommodated. That is, the tumbler 23 and the partition plate 27 are alternately accommodated in the inner cylinder 19.

  Reset bars 63 and 63 are fixed to the inner cylinder 19 below the upper locking bar 43. As shown in FIG. 5, the reset bar 63 is formed in a comb-like shape in which a plurality of concave portions 63 a and convex portions 63 b are continuous in the axial direction. In the reset bars 63 and 63, the convex portion 63b is located in the movement locus of the first tumbler 23A, and the slide of the first tumbler 23A in the direction orthogonal to the axis is regulated by contacting the convex portion 63b.

  A movable block 29 is accommodated in the inner cylinder 19 so as to be movable in the axial direction. The movable block 29 has the plurality of tumbler accommodating spaces 51 in the axial direction, and slides the first tumbler 23 </ b> A into each tumbler accommodating space 51. Hold freely. Thus, the first tumbler 23A is moved in the axial direction together with the movable block 29 by moving the movable block 29 in the axial direction. A backup pin 31 passes through the movable block 29, and the backup pin 31 guides the first tumbler 23A so as to be slidable. The backup pin 31 slides relative to the movable block 29 by having both ends in contact with the inner cylinder 19 side. The reset bars 63, 63 also penetrate the movable block 29, but both ends abut against the inner cylinder 19, so that the reset bars 63, 63 slide relative to the movable block 29. That is, the first tumbler 23 </ b> A held by the movable block 29 is opposed to either the concave portion 63 a or the convex portion 63 b of the reset bar 63 by following the movement of the movable block 29.

  Further, a cons bar 33 is passed through the through holes 19a, 27a, and 23Bd in the inner cylinder 19, the partition plate 27, and the second tumbler 23B. The cons bar 33 is movable in the axial direction and supported by the inner cylinder 19, and is urged by the urging spring 35 in the same direction as the key insertion direction. The cons bar 33 is a member for canceling the use state of the conskey 75, and its operation will be described in detail later.

  A tail piece 73 is rotatably held at the rear portion of the outer cylinder 15. The tail piece 73 is restricted from falling off the outer cylinder 15 by the washer ring 37 and the stopper ring 39. A sloped cam surface 60 a having a height difference is formed on the inner surface of the tail end 73 on the rear end side. The movable block 29 has a longitudinal rear end in sliding contact with the cam surface 60a. The locking bar 43 is movable in the axial direction by engaging the groove 43a with the restriction piece 13a fitted to the outer cylinder 15. On the other hand, the inner cylinder 19 abuts on the tail piece 73 and is restricted from moving in the axial direction. Therefore, the movable block 29 is moved rearward in the axial direction (key insertion direction) with the rear end thereof being in sliding contact with the cam surface 60a as the inner cylinder 19 is rotated. Further, the inner cylinder 19 and the movable block 29 accommodated in the outer cylinder 15 are accommodated in such a manner that their rear ends are in contact with the tail piece 73 and their front ends are in contact with the decoration ring 67 so that they cannot fall off. Although not shown, a cam surface equivalent to the cam surface 60 a is provided between the decoration ring 67 and the movable block 29, and this cam surface is in sliding contact with the longitudinal front end of the movable block 29.

  Here, in this embodiment, the movable block 29 can be moved when the inner cylinder (or key) 19 is in a rotation angle range of 90 ° to 180 °. In this specification, the rotation angle range in which the movable block is moved is referred to as a “set rotation angle range” of the cylinder lock 100. On the other hand, the rotation angle range from 0 ° to 90 ° is referred to as “locking / unlocking operation rotation range” of the cylinder lock 100.

  In the present embodiment, a second dedicated key 71 and a change key 69 described later are used for the cylinder lock 100 in addition to the first dedicated key 21 described above. The first dedicated key 21, the second dedicated key 71, and the change key 69 each have a rotation angle range that can be used. That is, the first dedicated key 21 and the second dedicated key 71 can be rotated in the forward direction (for example, clockwise direction) and the reverse direction (counterclockwise direction) in the locking / unlocking operation rotation range, and in the set rotation angle range. It can be rotated in the reverse direction. On the other hand, the change key 69 can be rotated in the forward direction from the locking / unlocking operation rotation range to the set rotation angle range. As will be described in detail later, in the cylinder lock 100 of the present embodiment, when changing from the first dedicated key 21 to the second dedicated key 71, first, the change key 69 is used to change the set rotation angle from the locking / unlocking operation rotation range. Rotate to the range (0 ° to 180 °), remove the change key 69 at the 180 ° rotation position, insert the key to be changed at that position, that is, the second dedicated key 71, etc., from the set rotation angle range Reverse rotation is performed to the locking / unlocking operation rotation range (180 ° to 0 °). Thereby, the change from the first dedicated key 21 to the second dedicated key 71 can be performed.

  A core member 64 is provided between the inner cylinder 19 and the tail piece 73. The core member 64 is positioned across the inner cylinder 19 and the tail piece 73, thereby connecting the inner cylinder 19 and the tail piece 73 so as not to be relatively rotatable. On the other hand, the core member 64 releases the connection between the inner cylinder 19 and the tail piece 73 within the set rotation angle range. As a result, the inner cylinder 19 can idle with respect to the tail piece 73. The core member 64 is disposed at a position where the inner cylinder 19 and the tail piece 73 are connected to each other by the biasing spring 65 at a normal time.

  The tail piece 73 can be rotated only in the locking / unlocking operation rotation range (0 ° to 90 °) by being connected to a lock mechanism (not shown). Therefore, the inner cylinder 19 is rotated only in the locking / unlocking operation rotation range in a state where the core member 64 connects the inner cylinder 19 and the tail piece 73. Here, a change key 69 described later is formed longer than the other first dedicated keys 21 and second dedicated keys 71. Accordingly, when the change key 69 is inserted into the key hole 17, the tip presses the core member 64, and the connection between the inner cylinder 19 and the tail piece 73 is released. That is, when the change key 69 is inserted, the connection with the tail piece 73 whose rotation is restricted by the lock mechanism is released, and the inner cylinder 19 can be rotated to the set rotation angle range (90 ° to 180 °). . The core member 64 is restricted from moving in the axial direction through an engagement groove (not shown) in the set rotation angle range and when returning from the set rotation angle range to the locking / unlocking operation rotation range. 19 and the tail piece 73 are maintained in the disengaged state.

  Here, as shown in FIG. 4, since the first tumbler 23 </ b> A is held by the movable block 29, when the movable block 29 moves to the back side in the direction perpendicular to the paper surface of FIG. 2, it is integrated with the movable block 29. It is moved in the same direction. As a result, the row tooth portion 55 is detached from the row tooth portion 57 of the second tumbler 23B that does not move. That is, in a state where the row tooth portion 55 is removed from the row tooth portion 57, the first tumbler 23A and the second tumbler 23B are in a state of being disconnected.

  The cylinder lock 100 according to the present embodiment is in a state where it can be locked / unlocked with the first dedicated key 21 and other dedicated keys (second dedicated key 71, third dedicated key (not shown),...). It is possible to switch to a lockable / unlockable state. In addition, in the state where these dedicated keys can be used, a master key 77 that can be locked and unlocked is provided. The master key 77 can be changed to another master key. That is, the first master key 77 that can be locked / unlocked with respect to the first dedicated key 21, the second dedicated key 71, and the third dedicated key cannot be locked / unlocked by changing the master key. The key 21, the second dedicated key 71, and the third dedicated key can be locked and unlocked by a new second master key (not shown) after the change.

Next, an operation procedure for changing the dedicated key of the cylinder lock configured as described above will be described.
FIG. 6 is an operation explanatory diagram of the rotation range, and FIG. 7 is an operation explanatory diagram showing a cross-sectional view in a direction orthogonal to the key insertion direction in which the first dedicated key is inserted.
In this operation procedure, a change operation in which the second dedicated key 71 can be used by using the change key 69 for the cylinder lock 100 in which the first dedicated key 21 was initially usable will be described. Note that the cylinder lock 100 can be changed to the first dedicated key 21 and to the other third dedicated key by using the change key 69.

  Here, each key to be replaced when changing the key will be schematically described with reference to FIG. 6. In the state where the first dedicated key 21 can be used in the range of the white circle 1 to the white circle 2, the change key is indicated by the white circle 3. 69 is inserted, and the change key 69 is rotated from the white circle 4 to the white circle white circle 7, and then removed by the white circle 8. From this state, the second dedicated key 71 is inserted at the white circle 9, and the second dedicated key 71 is rotated from the white circle 10 to the white circle 13, and the rotation is completed at the white circle 13 and is extracted.

Hereinafter, the operation procedure of key change will be further described.
As shown in FIG. 7, in a state where the unlocking operation can be performed with the first dedicated key 21, that is, in the operation state with the first dedicated key 21, the cylinder lock 100 has an upper and lower first tumbler 23A and a second tumbler 23B. The row tooth portion 55 and the row tooth portion 57 are engaged and connected. In this state, the tail piece 73 is connected to the inner cylinder 19.

  When the first dedicated key 21 is inserted into the key hole 17, the key protrusion 59 of the second tumbler 23B enters the key groove 21a of the first dedicated key 21, and the tumbler 23 moves to the right in FIG. The bar entry recess 53 </ b> A and the bar entry recess 53 </ b> B of the tumbler 23 coincide with the tumbler engagement plate portion 47 of the locking bar 43. That is, the locking / unlocking operation by the first dedicated key 21 is possible. In this state, the tip of the key 21 does not reach the core member 64, and the tail piece 73 is connected to the inner cylinder 19.

FIG. 8 is an operation explanatory view showing a sectional view in a direction orthogonal to the key insertion direction in which the master key is inserted.
When the master key 77 is inserted into the key hole 17, the key protrusion 59 of the second tumbler 23B enters the key groove 77a of the master key 77, and the tumbler 23 moves further to the right in FIG. The bar entry recess 53 </ b> A and the bar entry recess 53 </ b> B of the tumbler 23 coincide with the tumbler engagement plate portion 47 of the locking bar 43. That is, the locking / unlocking operation by the master key 77 is possible. In this state, the tip of the key 77 does not reach the core member 64, and the tail piece 73 is connected to the inner cylinder 19.

FIG. 9 is an operation explanatory view showing a cross-sectional view in a direction orthogonal to the key insertion direction in which the change key is inserted, and FIG. FIG. 11 is a sectional view cut along a plane including the axis of the cylinder lock shown in FIG. 10, and FIG. 12 is a sectional view in a direction orthogonal to the key insertion direction in which the change key is rotated approximately 135 °. FIG. 13 is a sectional view cut along a plane including the axis of the cylinder lock shown in FIG. 12, and FIG. 14 is a sectional view in a direction perpendicular to the key insertion direction in which the change key is rotated 180 °. FIG. 15 is an explanatory view, and FIG. 15 is a sectional view cut along a plane including the axis of the cylinder lock shown in FIG.
When the change key 69 is inserted into the key hole 17 in the state of the white circle 3 in FIG. 6, the key protrusion 59 of the second tumbler 23B enters the key groove 69a of the change key 69 as shown in FIG. 9 moves to the right in FIG. 9, the bar entry recess 53 </ b> A and the bar entry recess 53 </ b> B of the tumbler 23 coincide with the tumbler engagement plate portion 47 of the locking bar 43, that is, the shear lines are aligned. As a result, the pointed head 45 of the locking bar 43 is disengaged from the lock groove 49, the locking bar 43 is immersed in the bar receiving groove 41, and the inner cylinder 19 is the white circle 4, white circle 5, FIG. 10, FIG. As shown in FIG. 4, it can be rotated 90 ° clockwise. In this state, the lock may be locked and unlocked by the change key 69 by rotating back to the white circle 5, the white circle 4, and the white circle 3.

  At the same time, the connection between the inner cylinder 19 and the tail piece 73 is released by the tip of the change key 69, and the inner cylinder 19 can be rotated to a set rotation angle range exceeding the locking / unlocking operation rotation range by the change key 69.

  As shown in the white circles 6, 12, and 13 of FIG. 6, when the change key 69 is rotated to a position exceeding 90 °, for example, approximately 135 °, the movable block 29 is brought into sliding contact with the cam surface 60 a. Move in the axial direction. By the movement of the movable block 29, the first tumbler 23A is driven to the back side in the key insertion direction, and thereby the row tooth portion 55 and the row tooth portion 57 are disconnected. The disconnected first tumbler 23 </ b> A is biased in the direction of the reset bar 63 by the force of the tumbler biasing spring 52, but is held in position by being locked to the locking bar 43. Further, the second tumbler 23B is moved by the first tumbler 23A together with the movable block 29, so that the row tooth portion 57 is released and the connection with the first tumbler 23A is released. The position is held.

  At this time, the convex portion 63b of the reset bar 63 is located on the movement locus of the first tumbler 23A. That is, when the movable block 29 slides back, the first tumbler 23 </ b> A can be locked by the reset bar 63.

  When the change key 69 has been rotated to the position (180 °) shown in the white circle 7 in FIG. 6, FIG. 14, and FIG. 15, the locking bar 43 again enters the lock groove 49 on the opposite side, and the inner cylinder 19 moves into the outer cylinder 15. On the other hand, it is locked. In this state, the first tumbler 23 </ b> A is biased to the right in FIG. 14 by the tumbler biasing spring 52, and comes into contact with the reset bar 63 and stops. On the other hand, sliding of the second tumbler 23 </ b> B is restricted via the key protrusion 59 engaged with the key groove 69 a of the change key 69.

  When the change key 69 is removed at the white circle 8 in FIG. 6, the engagement between the key protrusion 59 and the change key 69 is released and the second tumbler 23B becomes free. On the other hand, the first tumbler 23 </ b> A is urged by the tumbler urging spring 52 and remains in contact with the reset bar 63. The first tumbler 23A held at this position has its bar entry recess 53A positioned, and the bar entry recess 53A is set at a position where the locking bar 43 can be immersed. That is, the position of the first tumbler 23A is held by the reset bar 63 together with the tumbler urging spring 52, and the position thereof allows the locking bar 43 to be immersed, and the first and second tumblers 23A and 23B are positioned at different positions. It is arranged at the reference position when connecting. In other words, the first tumbler 23A temporarily fixes a position where the locking bar 43 can be retracted in the subsequent operation, and waits as a reference position when the second tumbler 23B is reconnected.

  Even if the change key 69 is removed, the core member 64 is not connected to the inner cylinder 19, and the inner cylinder 19 and the tail piece 73 are relatively rotatable.

FIG. 16 is an operation explanatory view showing a cross-sectional view in a direction orthogonal to the key insertion direction in a state where the second dedicated key is inserted.
If the change key 69 is removed, the second dedicated key 71 as the second key is inserted as a new key to be changed at the white circle 9 in FIG. When the second dedicated key 71 is inserted, the second tumbler 23 </ b> B is slid along the key groove 71 a of the second dedicated key 71 via the key protrusion 59. At this time, the second tumbler 23B is arranged at a position different from that of the first dedicated key 21. That is, the row tooth portion 57 of the second tumbler 23B coincides with the row tooth portion 55 at a different position.

FIG. 17 is an explanatory diagram of the operation when the second dedicated key is at the approximately 135 ° rotation position.
When the second dedicated key 71 is rotated counterclockwise in this state, the tip 45 of the locking bar 43 is disengaged from the lock groove 49 and the inner cylinder 19 can be rotated.

FIG. 17 is an operation explanatory view showing a cross-sectional view in a direction orthogonal to the key insertion direction in a state where the second dedicated key is rotated back by 45 °, and FIG. 18 is a key in a state where the second dedicated key is rotated back by 180 °. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to an insertion direction.
When the second dedicated key 71 is rotated from the white circle 9 to the white circle 10 in FIG. 6, the movable block 29 is brought into sliding contact with the cam surface 60a, so that the movable block 29 moves to the front side in the key insertion direction. Return to position. As a result, as shown in FIGS. 17 and 18, the first tumbler 23A moves together with the movable block 29, and the row tooth portion 55a of the first tumbler 23A is fitted into the row tooth portion 57 of the second tumbler 23B. Become. Further, this movement releases the contact state of the first tumbler 23A with the reset bar 63. Then, the second dedicated key 71 is rotated to the position of the white circle 13 in FIG. 6 to complete the change of the combination position of the first tumbler 23A and the second tumbler 23B (see FIG. 18). At this time, the core member 64 again connects the inner cylinder 19 and the tail piece 73 so as not to be relatively rotatable.

FIG. 19 is an operation explanatory view showing a cross-sectional view in a direction orthogonal to the key insertion direction in a state where the second dedicated key is removed.
In this state, when the second dedicated key 71 is removed, the second dedicated key 71 and the second tumbler 23B are disengaged, and the first tumbler 23A and the second tumbler 23B are slid by the tumbler biasing spring 52. The key change is completed. After the key change, even if the first dedicated key 21 is inserted into the key hole 17, the bar entry recesses 53A and 53B of the tumbler 23 do not coincide with the tumbler engagement plate portion 47 (the shear lines are not aligned). It cannot be retracted into the bar receiving groove 41. As a result, the locking bar 43 does not come off from the lock groove 49 of the outer cylinder 15 and the rotation of the inner cylinder 19 is restricted. That is, the cylinder lock 100 can be locked and unlocked by the second dedicated key 71.

  In the present embodiment, the first tumbler 23 </ b> A and the second tumbler 23 </ b> B can be connected in a meshable pattern by the row tooth portions 55 and the row tooth portions 57. By connecting these at different positions, the tumbler 23 has the bar entry recesses 53A and 53B arranged at different positions. That is, the positions of the bar entry recesses 53A and 53B into which the tumbler engagement plate portion 47 can be inserted are changed. Thereby, it is possible to change to a plurality of first dedicated keys 21, second dedicated keys 71, third dedicated keys,... Having different key grooves 21a, 71a and the like.

  Moreover, even if the first tumbler 23A and the second tumbler 23B are relatively arranged at various positions, the tumbler 23 is formed with bar entry recesses 53A and 53B that allow the tumbler engagement plate portion 47 to enter in common. It will be. Accordingly, if the master key 77 is provided with a key groove into which the key protrusion 59 can enter at this position, the master key 77 can receive the tumbler engagement plate portion 47 at any position where the second tumbler 23B is arranged differently. That is, it can be locked and unlocked.

  Therefore, according to the cylinder lock 100 described above, by inserting the change key 69 and rotating the inner cylinder 19 within a predetermined set rotation angle range, the connection between the first tumbler 23A and the second tumbler 23B is released, In this state, the change key 69 is removed, an arbitrary dedicated key (for example, the second dedicated key 71) is inserted, and reversely rotated to the locking / unlocking operation rotation range, whereby the first tumbler 23A and the second tumbler 23B are Can be changed and connected to different combination arrangements according to any dedicated key. As a result, the first key can be changed to the second key. As a result, it is possible to change the key without exchanging the cylinder lock 100 and without spending a great deal of money. Further, since the lock can be changed only by inserting a new key to be used into the key hole 17, the changing operation can be performed very easily. Therefore, when a resident changes in a rental apartment or the like, the key (joint key) used by the old resident can be disabled.

  In addition to this, the first key (original key) can be used and the second key (new key) can be used to change to the second key usable state without using the first key (original key). Even when the key is lost, when the first key is intentionally disabled, or when the key is stolen, the change can be made possible.

  Similarly, it becomes possible to change the master key that can be used in common for each cylinder lock of each dedicated key. Group management with a simple master key can be performed, that is, it is possible to cope with a change of managers.

  Further, according to this cylinder lock 100, the shift to the set rotation angle range is performed by inserting the change key 69 longer than the dedicated key and the master key and releasing the engagement between the tail piece 73 and the inner cylinder 19. Therefore, an engagement / disengagement mechanism that selectively switches between an engagement state in which the tail piece 73 and the inner cylinder 19 rotate integrally and an engagement release state in which the tail piece 73 and the inner cylinder 19 are relatively rotatable. It can be easily configured with a simple structure. Further, since the change key 69 is long, it can be easily distinguished from other normal use keys (dedicated key, master key), and key management can be facilitated.

  In the above-described embodiment, the set rotation angle range is shown as a rotation angle range of 90 ° to 180 °, but is not limited to this angle range, and may be within a rotation angle range smaller than this range. In this case, the rotation of the key when changing the key can be reduced, and the operability is improved.

The cylinder lock may be provided with a pin tumbler (not shown). A plurality of pin tumblers are arranged in the insertion direction of the key hole 17. The pin tumbler includes a tumbler pin accommodated in the inner cylinder side pin accommodation hole and a driver pin accommodated in the outer cylinder side pin accommodation hole, and a coil spring is arranged between the lid and the driver pin that closes the outer cylinder side pin accommodation hole. Accordingly, the driver pin is urged toward the pin tumbler side. The tip of the pin tumbler protrudes into the key hole 17, and the arrangement of the pin tumbler is determined by the first dedicated key 21 inserted into the key hole 17, whereby the boundary between the pin tumbler and the driver pin is the outer periphery of the inner cylinder 19 and the inner periphery of the outer cylinder 15. It matches the shear line that is between. Therefore, if a different dedicated key is inserted, the pin tumbler or driver pin crosses the shear line, and the inner cylinder 19 cannot be rotated.
In the cylinder lock 100, in addition to the plurality of tumblers 23, a plurality of pin tumblers are provided, so that the number of key differences can be increased and crime prevention can be further improved.

20 is an exploded explanatory view of a cons mechanism portion provided in the cylinder lock shown in FIG.
In the cylinder lock 100 according to the above-described embodiment, once the normal use key (for example, the first dedicated key 21 or the like) is once used from the usage state of the consky 75, the locking / unlocking operation by the consky 75 becomes impossible. A cons function can be added.
For this reason, the cylinder lock 100 includes a cons bar 33, a pause tumbler 23Ba, a conskey 75, and a cons partition plate 79.

  The cons bar 33 is movable in the axial direction of the inner cylinder 19 and penetrates the plurality of second tumblers 23B. The cons bar 33 is urged by the urging spring 35 in the same direction as the key insertion direction.

  The pause tumbler 23Ba is composed of at least one second tumbler 23B penetrated by the cons bar 33. In the present embodiment, eight second tumblers 23B on the rear side shown in FIG. 4 serve as rest tumblers 23Ba. The resting tumbler 23Ba engages the stepped portion 81 in the through hole 23Bd with the cons bar 33, thereby matching the bar entry recess 53B with the locking bar 43 (see FIGS. 21A and 21B). On the other hand, the rest tumbler 23Ba is disengaged from the stepped portion 81 by the movement of the cons bar 33 in the axial direction (see FIG. 21 (d)) and is slid in the direction orthogonal to the axial line of the inner cylinder 19 to lock the bar entry recess 53B. It does not coincide with the bar 43 (see FIG. 21E).

  The consky 75 is inserted into the key hole 17, and the bar entry recess 53 </ b> B of the second tumbler 23 </ b> B (hereinafter referred to as “cons common tumbler 23 </ b> Bb”) other than the pause tumbler 23 </ b> Ba is aligned with the locking bar 43. In the present embodiment, the five second tumblers 23B on the front side shown in FIG. 4 serve as the cons common tumbler 23Bb. The cons common tumbler 23Bb is not provided with the step portion 81 in the through hole 23Bd.

  The cons partition plate 79 includes an upper cons partition plate 79A and a lower cons partition plate 79B. The lower cons partition plate 79B is accommodated in the inner cylinder 19 so as to be slidable in the direction perpendicular to the axis of the inner cylinder 19 (the vertical direction in FIG. 20) between the second tumblers 23B. The lower cons partition plate 79B is urged in the separation direction (downward in FIG. 20) by a pair of springs 83 and 83 disposed between the lower cons partition plate 79A. Further, a release tumbler 85 is slidably provided in the left and right direction in FIG. 20 on the lower cons partitioning plate 79B, and the release tumbler 85 is urged leftward in FIG. In the present embodiment, the release tumbler 85 is formed to fit within the thickness of the lower cons partition plate 79B.

  The cons partition plate 79 is slid in the direction orthogonal to the axis of the inner cylinder 19 by inserting a dedicated key or master key into the key hole 17, and the engagement with the cons bar 33 is released by this sliding. When the engagement of the cons bar 33 with the cons partition plate 79 is released, the cons bar 33 is moved to the back side in the axial direction by the urging force of the urging spring 35.

FIG. 21 is an explanatory diagram showing a pause tumbler in a cons state and a state after releasing the cons. FIG. 22 is an operation explanatory diagram showing a cross-sectional view in a direction orthogonal to the key insertion direction of the cylinder lock with the construction key removed in the cons state. FIG. 23 is an operation explanatory view showing a cross-sectional view in a direction perpendicular to the key insertion direction of the cylinder lock in which the construction key is inserted in the cons state, and FIG. 24 is a diagram of the cylinder lock in which the construction key is rotated in the cons state. Operation explanatory diagram showing a cross-sectional view in the direction orthogonal to the key insertion direction, FIG. 25 is an operation explanatory diagram showing a cross-sectional view in the direction orthogonal to the key insertion direction of the cylinder lock in which the normal use key is inserted in the cons state, FIG. 26 is an operation explanatory view showing a sectional view in a direction orthogonal to the key insertion direction of the cylinder lock in which the normal use key is rotated in the state of FIG.
In the cylinder lock 100 having such a cons function, when the conskey 75 shown in FIG. 22 is used, the upper cons partition plate 79A and the lower cons partition plate 79B are separated by the springs 83 and 83. Further, the release tumbler 85 is urged to the left by the urging means 87, and the release tumbler 85 maintains the separated state between the upper cons partition plate 79A and the lower cons partition plate 79B. Has been placed. In this state, the recess 91 of the release tumbler 85 matches the locking bar 43, and the bar entry recess 53B of the cons common tumbler 23Ba also matches the locking bar 43 as shown in FIG. Accordingly, the cons common tumbler 23Bb allows the locking bar 43 to be immersed. In the figure, reference numeral 89 denotes a spacer that partitions the movable block 29 and the cons partition plate 79.

  In this state, when the consky 75 is inserted into the key hole 17, the cons common tumbler 23Bb is operated, and the locking bar 43 enters the recess 91 of the release tumbler 85 as shown in FIG. Can be locked and unlocked. In addition, as shown in FIG. 21C, the resting tumbler 23Ba also makes the bar entry recess 53B coincide with the locking bar 43 so that the locking bar 43 can be immersed.

  On the other hand, once the normal use key (dedicated key, master key) 21 is used once the construction is completed, the release tumbler 85 is slid rightward as shown in FIG. In this state, as shown in FIG. 26, when the first dedicated key 21 is rotated clockwise, the lower cons partition plate 79 </ b> B pressed by the backward movement of the locking bar 43 is moved upward and engaged with the cons bar 33. Is released.

  The cons bar 33, which has been disengaged from the lower cons partition plate 79 </ b> B, is moved toward the back in the axial direction by the urging force of the urging spring 35. When the cons bar 33 is moved, the engagement between the cons bar 33 and the step portion 81 of the resting tumbler 23Ba is released as shown in FIG. The resting tumbler 23Ba disagrees with the locking bar 43 due to the movement due to the disengagement (see FIG. 21E). That is, the pause tumbler 23Ba, which has been paused until now, starts functioning when the normal use key 21 is used, and thereafter cannot be locked or unlocked by the consky 75.

  Thus, according to the cylinder lock 100 having the cons function, when the conskey 75 is used, the cons common tumbler 23Bb is operated by the conskey 75 to enable the locking and unlocking of the cylinder lock 100. First, by using the normal use key (dedicated key, master key) 21, the lower cons partition plate 79B is moved to disengage the cons bar 33, and the cons bar 33 is moved in the axial direction. By the movement of the cons bar 33, the engagement between the cons bar 33 and the resting tumbler 23Ba is released, and the resting tumbler 23Ba that has been made to match the bar entry recess 53B with the locking bar 43 is moved by the disengagement until the locking bar 43 Mismatch. That is, the function of the pause tumbler 23Ba that has been paused until now can be started by using the normal use key 21. As a result, it is possible to lock and unlock only with the normal use key 21, disable the use of the consky 75, and secure crime prevention.

It is the external appearance perspective view which represented the cylinder lock concerning this invention with the normal use key and the key for construction. It is sectional drawing of the direction orthogonal to the key insertion direction of the cylinder lock shown in FIG. FIG. 3 is an exploded view of FIG. 2. It is sectional drawing cut | disconnected by the surface containing the axis line of the cylinder lock shown in FIG. FIG. 5 is an exploded view of FIG. 4. It is operation | movement explanatory drawing of a rotation range. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in which the 1st exclusive key was inserted. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in which the master key was inserted. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in which the change key was inserted. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction which the change key rotated 90 degrees. It is sectional drawing cut | disconnected by the surface containing the axis line of the cylinder lock shown in FIG. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction where the change key was rotated about 135 degrees. It is sectional drawing cut | disconnected by the surface containing the axis line of the cylinder lock shown in FIG. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction which the change key rotated 180 degrees. It is sectional drawing cut | disconnected by the surface containing the axis line of the cylinder lock shown in FIG. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in the state in which the 2nd exclusive key was inserted. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in the state in which the 2nd exclusive key was rotated back 45 degrees. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in the state which the 2nd exclusive key rotated back 180 degrees. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction in the state in which the 2nd exclusive key was extracted. FIG. 2 is an exploded explanatory view of a cons mechanism portion provided in the cylinder lock shown in FIG. 1. It is explanatory drawing showing the rest tumbler of the state after a cons state and a cons cancellation | release. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction of the cylinder lock from which the construction key was extracted in the cons state. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction of the cylinder lock in which the construction key was inserted in the cons state. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction of the cylinder lock in which the construction key was rotated in the cons state. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction of the cylinder lock in which the normal use key was inserted in the cons state. It is operation | movement explanatory drawing showing the cross sectional view of the direction orthogonal to the key insertion direction of the cylinder lock in which the normal use key was rotated in the state of FIG.

Explanation of symbols

15 ... outer cylinder 17 ... key hole 19 ... inner cylinder 21 ... first dedicated key (first key)
21a, 71a ... key groove 23 ... tumbler 23A ... first tumbler 23B ... second tumbler 23Ba ... pause tumbler 29 ... movable block 33 ... cons bar 41 ... bar receiving groove 43 ... locking bar 49 ... locking groove 51 ... tumbler receiving space 52 ... Biasing means (tumbler biasing spring)
53A, 53B ... Bar entry recess 55, 57 ... Connecting means (row teeth)
59 ... Key protrusion 63 ... Reset bar 69 ... Change key 71 ... Second dedicated key (second key)
73 ... Tailpiece 75 ... Consky (key for construction)
77 ... Master key 79 ... Cons partition plate 81 ... Step part 100 ... Cylinder lock

Claims (4)

An outer cylinder,
An inner cylinder that is rotatably accommodated in the outer cylinder, has a key hole into which an exclusive key, a master key, or a change key is inserted on one end face, and a tail piece connected to a lock mechanism on the other end face;
A bar receiving groove formed in the axial direction on the outer peripheral surface of the inner cylinder;
It is accommodated in the bar accommodating groove so as to protrude from the outer peripheral surface, and is disposed so as to protrude from the outer peripheral surface, thereby entering a lock groove formed on the inner periphery of the outer cylinder to rotate the inner cylinder with respect to the outer cylinder. A locking bar to block,
By inserting a key projection into a key groove of a key that is accommodated in the inner cylinder in the axial direction and inserted into the key hole, the bar is recessed in the direction orthogonal to the axis of the inner cylinder so that the bar entry recess matches the locking bar. A tumbler that allows the locking bar to be retracted into the bar receiving groove;
A cylinder lock comprising:
The change key that allows the inner cylinder to rotate within a predetermined set rotation angle range that exceeds the lock / unlock operation rotation range of the dedicated key and the master key;
A movable block that is housed in the inner cylinder and is movable in the axial direction within the predetermined set rotation angle range of the inner cylinder;
The tumbler has the bar entry recess for allowing the locking bar to be immersed and the first tumbler accommodated in the movable block, and also enters the bar entry recess and the key groove for allowing the locking bar to be immersed. A second tumbler having the key protrusion and housed in the inner cylinder outside the movable block;
The first tumbler and the second tumbler can be selectively connected to each other at a plurality of different positions in the sliding direction by connecting means, and the connection of the first tumbler is driven by the movement of the movable block. It can be released by movement in the axial direction, and can be selectively reconnected at different positions according to any dedicated key inserted in the predetermined set rotation angle range and reversely rotated to the locking / unlocking operation rotation range. Features cylinder lock.   The first tumbler is urged to urge one side in the sliding direction with respect to a reset bar arranged on the movement trajectory in the sliding direction when the connection with the second tumbler due to the movement in the axial direction is released. The cylinder lock according to claim 1, wherein the cylinder lock is held at a position where the locking bar is brought into contact with the locking bar and allows the immersion of the locking bar.   The transition of the inner cylinder to the predetermined set rotation angle range is to release the engagement between the tailpiece and the inner cylinder by inserting the change key that is longer than the dedicated key and the master key. The cylinder lock according to claim 1 or 2, wherein the cylinder lock is made possible. A cons bar that is movable in the axial direction of the inner cylinder and passes through the plurality of second tumblers;
At least one second tumbler penetrating through the cons bar, and engaging the step part with the cons bar makes the bar entry recess coincide with the locking bar, while the cons bar moves in the axial direction. A resting tumbler in which the engagement of the part is released and the bar entry recess is slid in the direction perpendicular to the axis of the inner cylinder so that the bar entry recess does not coincide with the locking bar;
A construction key that is inserted into the key hole and matches the bar entry recess of the tumbler other than the resting tumbler with the locking bar;
The dedicated key or the master key is inserted in the key hole so as to be slidable in the direction orthogonal to the axis of the inner cylinder between the second tumblers, so that the axis is orthogonal to the axis of the inner cylinder. A cons partition plate that is slid and disengages from the cons bar by the slide to move the cons bar in the axial direction;
The cylinder lock according to any one of claims 1, 2, and 3.

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