JP2019073872A - Cylinder lock and inner cylinder thereof - Google Patents

Abstract

To reliably prevent cylinder lock picking and concurrently to provide a cylinder lock which can easily and inexpensively provide a countermeasure against picking if the cylinder lock is particularly, an inner cylinder replaceable type, and an inner cylinder used therein.SOLUTION: A cylinder lock 1 includes: an outer cylinder 30; an inner cylinder 20 rotatable relative to the outer cylinder 30; and one or more tumblers 40 slidable at least between a locking position at which the inner cylinder 20 is prohibited from rotating relative to the outer cylinder 30 and an unlocked position permitting a rotation of the inner cylinder 20 relative to the outer cylinder 30, at least one of the tumblers 40 having a movement restricting groove 45, the inner cylinder 20 being provided with locking means 55 that can be engaged with the movement restricting groove 45.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a cylinder lock and an inner cylinder thereof, and more particularly to a cylinder lock and an inner cylinder which can prevent an unauthorized unlocking by picking.

  Conventionally, an outer cylinder fixed to a target for locking and unlocking and an inner cylinder (cylinder) rotating relative to the outer cylinder inside the outer cylinder are inserted, and a key fitted in the keyhole of the inner cylinder is inserted There is known a cylinder lock that locks and unlocks by rotating. And in such a cylinder lock, an unauthorized unlocking action (so-called picking) in which the tumbler is forcibly moved by means other than the key (for example, a tool etc.) fitted to the keyhole to rotate the inner cylinder relative to the outer cylinder Techniques have also been developed to prevent this. As an example, there is known a technique for restricting the illegal movement of the tumbler by the projection provided on the outer cylinder when the tumbler is illegally moved (see, for example, Patent Document 1).

  Further, as a type of cylinder lock, an inner cylinder replaceable cylinder lock capable of replacing an inner cylinder (cylinder) is also widely known (see, for example, Patent Document 2). The inner cylinder exchangeable cylinder lock can easily change permission / disapproval of locking / unlocking by replacing the inner cylinder, so the user of the key lost or the object of locking / unlocking (eg office equipment etc.) It is excellent as a crime prevention measure when it changes.

Utility model registration No. 3083612 JP 2014-74282 A

  However, a technique for preventing picking applicable to the inner cylinder replaceable cylinder lock still has to be studied. For example, the technique described in Patent Document 1 is a technique in a cylinder lock in which replacement of the inner cylinder can not be performed, and the inner cylinder and the outer cylinder are configured to restrict unauthorized unlocking. That is, when replacing from the cylinder lock which is not provided with the conventional picking countermeasure, it is necessary to replace the outer cylinder fixed to the object of locking and unlocking.

  In particular, in the case of the inner cylinder replaceable cylinder lock, there is a great advantage in that it is not necessary to replace the outer cylinder fixed to the object of locking and unlocking. In the structure which regulates such an unlocking, an outer cylinder must be replaced | exchanged for a picking countermeasure, there existed a big problem that cost and the effort of an operation | work are required further not being able to take advantage of the original advantage.

  The present invention is intended to solve such conventional problems, and reliably prevents picking in a cylinder lock, and in particular, in an inner cylinder replaceable cylinder lock, a picking countermeasure is inexpensively and easily. An object of the present invention is to provide a cylinder lock that can be applied and an inner cylinder used therefor.

  The present invention relates to an outer cylinder, an inner cylinder rotatable relative to the outer cylinder, a locking position for inhibiting relative rotation of the inner cylinder relative to the outer cylinder, and relative rotation of the inner cylinder relative to the outer cylinder. A cylinder lock having at least one slideable tumbler between unlocking positions permitting movement of the inner cylinder, the at least one tumbler having a movement restricting groove, and the inner cylinder The cylinder lock is characterized in that it comprises locking means that can be locked in the movement restricting groove.

  Moreover, this invention is an inner cylinder used for the said cylinder lock.

  According to the cylinder lock according to the present invention, it is possible to reliably prevent picking in the cylinder lock, and in particular, in the inner cylinder replaceable cylinder lock, it is possible to take an anti-picking countermeasure inexpensively and easily. Can play.

It is a schematic view of a cylinder lock concerning this embodiment, and (a) front view of outer cylinder, (b) side view of outer cylinder, (c) side view of inner cylinder, (d), (e) plan view of key It is. It is a schematic diagram of the cylinder lock concerning this embodiment, and is an appearance perspective view of (a) and (b) inner cylinder main part, and a top view of (c) and (d) tumbler. It is a schematic diagram of the inner cylinder concerning this embodiment, (a) disassembled perspective view, (b) top view of retaining plate, (c) side view of retaining plate, (d) sectional view of retaining plate is there. It is a schematic diagram of the inner cylinder concerning this embodiment, (a) Top view, (b) Side view, (c) It is sectional drawing. It is sectional drawing which shows operation | movement of the tumbler of the cylinder lock concerning this embodiment. It is a side view which shows the other example of the cylinder lock concerning this embodiment.

  Hereinafter, the cylinder lock 1 according to the present embodiment will be described in detail using the drawings. In the drawings used in the following embodiments, some of the configurations may be omitted as appropriate to simplify the drawings.

<Cylinder lock>
FIG. 1 is a view showing the cylinder lock 1 according to the present embodiment, and FIG. 1 (a) is a front view of the outer cylinder 30, and FIG. 1 (b) is a side view of the outer cylinder 30. (C) is a side view of the inner cylinder, and (d) and (e) of the figure are plan views schematically illustrating the key 10.

  As shown in FIGS. 6A to 6 C, the cylinder lock 1 includes an outer cylinder 30 of a substantially cylindrical shape and an inner cylinder 20 of a substantially cylindrical shape coaxially disposed inside the outer cylinder 30. And.

  The outer cylinder 30 is a substantially cylindrical metal member fixed to an object (for example, a cabinet, a locker or the like) to be subjected to locking / unlocking, and holds the inner cylinder 20 relatively rotatably.

  The inner cylinder 20 is a substantially cylindrical metal member and has a key insertion hole (described later) extending in the axial direction, and the key insertion hole from the key hole which is the front end F (one end in the axial direction) When the key 10 conforming to the above is inserted, it rotates relative to the outer cylinder 30 and pivots a bar (not shown) etc. connected to the rear end R (end opposite to the key hole 25 in the axial direction) Let

  The knurling portion is configured to engage with the main body of an object (e.g., a cabinet, a locker, etc.) to be locked and unlocked to block the opening of the door such as the cabinet or the locker and allow the opening of the door. That is, the inner cylinder 20 is configured to be rotatable between a locking position that prevents the opening of the door and an unlocking position that permits the opening of the door.

  The inner cylinder 20 is a unit including at least an inner cylinder main body 21, a plurality of tumblers 40, a plate member 50, and biasing means (for example, an elastic member such as a spring, not shown here) of the tumblers 40. The inner cylinder main body 21 accommodates a plurality of tumblers (plate-like disc tumblers in this example) 40 along the axial direction. Although the details will be described later, the plurality of tumblers 40 are formed by the plate-like members (retaining prevention plates) 50 disposed along the outer peripheral surface (the outer peripheral surface of the inner cylinder main body 21) of the inner cylinder (inner cylinder unit) 20. The departure from 20 is blocked. Further, an opening 51 is provided in the retaining plate 50, and in this example, both ends in the radial direction of the inner cylinder 20 (both ends in the vertical direction in FIG. The inner cylinder 20 is slidable so as to advance and retract in the direction (axial center direction) of the inner cylinder 20 and the outer cylinder 30.

  As shown in the figure (a), an engagement groove 31 is provided at a position where the inner wall of the outer cylinder 30 faces (a position facing up and down in the figure (a)). When 40 is advanced and a part thereof engages with the engaging groove 31 (moving to the locking position), relative rotation of the inner cylinder 20 with respect to the outer cylinder 30 is prohibited, and the tumbler 40 retracts from the engaging groove 31; When housed inside the inner cylinder 20 (moving to the unlocking position), relative rotation of the inner cylinder 20 with respect to the outer cylinder 30 is permitted.

  Further, the cylinder lock 1 of the present embodiment is a so-called inner cylinder exchange type cylinder lock 1 in which the inner cylinder 20 is configured so as to be exchangeably insertable into the outer cylinder 30.

  Referring to (b) of the figure, for example, on the rear end R side inside the inner cylinder main body 21 (position farthest from the entrance of the keyhole), an unlocking piece (lined along the axial direction with the tumbler 40) An unlocking tumbler 60 is accommodated. Further, a locking release hole 52 is provided on the rear end R side of the retaining plate 50, and the locking release piece 60 is provided inside the inner cylinder 20 (axial center direction) via the locking release hole 52. And can slide forward and backward in the direction of the outer cylinder 30.

  For example, a lock release groove (not shown) similar to the engagement groove 31 is provided at a position facing the lock release piece 60 on the inner wall of the outer cylinder 30 (the lower side in FIG. When the locking release piece 60 is advanced from the inner cylinder 20 and engaged with the locking release groove, removal of the inner cylinder 20 from the outer cylinder 30 is prohibited, and the locking release piece 60 is locked. Retraction from the release groove permits removal of the inner cylinder 20 from the outer cylinder 30.

  And as shown to the figure (d) and the figure (e), the key 10 corresponding to one certain cylinder lock 1 is a key for locking / unlocking the cylinder lock 1 shown at least in the figure (d) It includes a locking and unlocking key 10A) and an inner cylinder replacement key (inner cylinder exchange key 10B) shown in FIG.

  The key 10 has a grip portion 13 and an insertion portion 11. On the side portions (upper and lower side portions in the figure) of the insertion portion 11, key grooves (not shown) are engraved. The key groove is formed at any one of a plurality of depths. The inner cylinder replacement key 10B is formed with the same key groove as the locking and unlocking key 10A, and the tip of the insertion portion 11 is provided with an extended portion 11a formed longer than the locking and unlocking key 10A.

  Although illustration is omitted, an extension insertion hole into which the extension 11a of the inner cylinder replacement key is inserted is formed in the lock release piece accommodated in the inner cylinder 20 (inner cylinder main body 21), and the extension insertion When the extension 11a is inserted into the hole, the unlocking piece 60 is pushed upward, for example, as shown in FIG. That is, when the inner cylinder replacement key 10B is inserted into the keyhole, the extension 11a pushes up the locking release piece 60, and the locking release piece 60 retracts from the locking release groove of the outer cylinder 30, and the engagement is released. Thus, the inner cylinder 20 can be pulled out of the outer cylinder 30.

  In addition, the inner cylinder replacement key 10B is not limited to the one corresponding to the specific cylinder lock 1, and may be a master key, whereby a plurality of cylinder locks 1 can be locked and unlocked with one key, and The cylinder 20 can be exchanged and the key 10 can be managed.

  The inner cylinder main body 21 and the tumbler 40 will be further described with reference to FIG. The figure (a) is an external appearance perspective view of the inner cylinder main body 21 seen from the front end F side, and the figure (b) is an external appearance perspective view of the inner cylinder main body 21 seen from the rear end R side The same figure (c) and the same figure (d) are top views showing an example of a plurality of tumblers 40. In addition, the reduced scale of the inner cylinder main body 21 and the tumbler 40 is different.

  As shown in FIGS. 7A and 7B, the inner cylinder main body 21 is provided with a keyhole 25 at the front end F, and a substantially cylindrical portion is a tumbler accommodating portion 22 penetrating in the radial direction; A lock release piece storage portion 23 is provided. The tumbler accommodating portion 22 is configured such that a plurality of tumblers 40 are disposed apart from each other. Further, the rear end R is provided with a connection portion 24 to which a yoke portion (not shown) or the like is connected.

  As shown in FIGS. 6C and 6D, the tumbler 40 is, for example, a substantially rectangular plate-shaped tumbler (disk tumbler), and one end of the inner cylinder 20 in the radial direction (shown by hatching) The upper end portion or the lower end portion of the lower end portion is an engagement portion 41 engaged with the engagement groove 31 of the outer cylinder 30. In the vicinity of the approximate center of the tumbler 40, a key insertion hole 42 through which the key 10 is inserted is provided. The key insertion hole 42 has a shape corresponding to (abutable to) each of the key ridges extending in the axial direction (longitudinal direction) of the key 10 to be fitted, and for example, the shape differs for each tumbler 40 according to the shape of the key ridge It has become.

  The tumbler 40 of the present embodiment has a movement restricting groove 45 at one end in the width direction of the engaging portion 41 (one end in the circumferential direction when stored in the inner cylinder 20). The movement restricting groove 45 is, for example, a groove cut out in the center direction of the tumbler 40 from one end in the width direction of the engaging portion 41 so as to be along the outer peripheral surface of the inner cylinder 20 (inner cylinder main body 21). As will be described in detail later, when there is an unauthorized movement of the tumbler 40 (specifically, movement from the locking position toward the unlocking position), the movement restricting groove 45 is moved inward before reaching the unlocking position. It is locked near the outer periphery of the cylinder 20, and restricts the movement of the tumbler 40 so that the engaging portion 41 is not completely disengaged (regressed) from the engagement groove 31 of the outer cylinder 30.

  In addition, in the same figure (c) and the same figure (d), in order to explain that there is a tumbler 40 having a plurality of shapes (shape of key insertion hole 42, position of movement restricting groove 45) in one inner cylinder 20. The number and shape of the tumblers 40 are not limited to the example shown in FIG.

  Further, although the engaging portion 41 and the movement restricting portion 45 are provided at the upper and lower end portions of one tumbler 40, when incorporated into the inner cylinder 20, either one of the upper end portion or the lower end portion is engaged It is used as the unit 41 and the movement restricting unit 45.

  3 and 4 are diagrams for explaining the inner cylinder (inner cylinder unit) 20, and FIG. 3 (a) is an exploded perspective view, and FIG. 3 (b) is a top view of the retaining plate 50. The figure (c) is the side view which looked at the figure (b) from the lower part of illustration, and the figure (d) is a XX line sectional view of the figure (b). Although the tumbler 40 is schematically shown in FIG. 2A, the details are the same as those of the tumbler 40 shown in FIGS. 2B and 2C. 4 (a) is a top view of the inner cylinder 20, FIG. 4 (b) is a side view, and FIG. 4 (c) is a cross-sectional view corresponding to line Y-Y in FIG. 4 (b).

  As shown in FIG. 3 (a), the tumbler 40 and the lock release piece 60 in the tumbler housing 22 and the lock release piece housing 23 of the inner cylinder main body 21 and biasing means (for example, corresponding to these) , Elastic member) 26 is accommodated. The elastic member 26 is, for example, a coil spring, and biases each of the tumbler 40 and the locking release piece 60 in a direction from the inner cylinder 20 toward the outer cylinder 30.

  The key insertion holes 42 are set to abut the key grooves of the keys 10 corresponding to the positions of the respective tumblers 40, and when the keys 10 are inserted into the key insertion holes 42, the respective tumblers 40 have keys at corresponding positions. Depending on the depth of the groove, it is drawn into the inner cylinder 20 against the biasing force of the coil spring 26. In the case of the key 10 conforming to the cylinder lock 1, that is, when the amount of pulling the tumbler 40 into the inner cylinder 20 is appropriate for all the tumblers 40, the upper or lower engaging portion 41 of the tumbler 40 is either an outer cylinder It retreats from the engagement groove 31 of 30, and is accommodated in the inner cylinder 20 (inner cylinder main body 21). That is, the engaging portion 41 of the tumbler 40 moves from the locking position to the unlocking position, which allows the inner cylinder 20 to rotate relative to the outer cylinder 30.

  On the other hand, when the key 10 incompatible with the cylinder lock 1 is inserted from the keyhole 25, the amount of pulling the tumbler 40 into the inner cylinder 20 for the at least one tumbler 40 is not appropriate. As a result, the engaged state between the engagement portion 41 of the tumbler 40 and the engagement groove 31 of the outer cylinder 30 is maintained, and the relative rotation of the inner cylinder 20 is restricted (blocked).

  The unlocking piece 60 is a part of the tumbler of the present embodiment, and is accommodated in the unlocking piece accommodating portion 23 in the same manner as the tumbler 40.

  And in this embodiment, detachment | leave from the inner cylinder main body 21 of each tumbler 40 (The locking release piece 60 is also the same hereafter) is blocked | prevented by the securing board 50. As shown in FIG. Conventionally, for example, there is known a method in which a part of the inner cylinder main body 21 is deformed by caulking or the like to prevent the tumbler from coming off, but in the present embodiment, the detachment preventing plate 50 is formed on the outer peripheral surface of the inner cylinder main body 21. Fix the

  The retaining plate 50 is a plate-like member having a substantially semicircular arc shape in sectional view along the outer peripheral surface of the inner cylinder main body 21 as shown in FIGS. (B) to (d). An opening 51 and a lock release hole 52 are provided at positions corresponding to the housing 22 and the lock release piece housing 23, respectively. Both the opening 51 and the open end T of the locking release hole 52 in the circumferential direction are the tumblers 40 (inner cylinder) than the shoulders 47 of the tumblers 40 (see FIGS. 2C and 2D). It is located from the center of the main body 21). Further, on both ends in the circumferential direction of the retaining plate 50, a plurality of (in this example, three on each side, six in total) leg portions 53 are provided.

  As shown in FIG. 3A, the inner cylinder main body 21 is provided with fixing recesses 27 at positions corresponding to the legs 53 respectively. After accommodating the tumbler 40 and the coil spring 26 in the inner cylinder main body 21, as shown in FIG. 4, it is removed so as to cover the tumbler accommodating portion 22 and the unlocking piece accommodating portion 23 on both sides in the radial direction (upper and lower in the figure). The retaining plate 50 is brought into contact with the outer periphery of the inner cylinder main body 21 (a position facing in the radial direction, which is the upper and lower facing position in the figure), and the tip of the leg 53 is folded into the fixing recess 27. The retaining plate 50 is fixed to the

  As a result, the shoulder portion 47 of the tumbler 40 is restricted by the opening 51 and the open end T of the locking release hole 52, and the detachment from the inner cylinder main body 21 is restricted.

  In addition, a part of the retaining plate 50 of the present embodiment, specifically, the opening end T of the retaining plate 50 can be locked in the movement restricting groove 45 when the tumbler 40 is improperly moved. The locking means 55 is provided. That is, when the tumbler 40 moves improperly, the open end T of the locking plate 50 is locked in the movement restricting groove 45 while moving from the locking position to the unlocking position, and the movement thereafter is It is regulated. This will be described below.

<Movement of tumbler>
FIG. 5 is a cross-sectional view (a cross-sectional view corresponding to the Y-Y line in FIG. 4B) showing that the tumbler 40 improperly moves due to picking or the like in a state where the cylinder lock 1 is locked. The figure (a) is a figure which shows a locked state, and the figure (b) is a figure showing the initial state where the tumbler 40 is illegally moved, and the figure (c) is the movement of the tumbler 40. It is a figure which shows the state which was carried out.

  As described above, the tumbler 40 is slidable between the locking position prohibiting relative rotation of the inner cylinder 20 with respect to the outer cylinder 30 and the unlocking position permitting relative rotation of the inner cylinder 20 with respect to the outer cylinder 30. It is configured. As shown in FIGS. 7A to 7C, when the engaging portion 41 of the tumbler 40 is not completely retracted from the engaging groove 31 of the outer cylinder 30, the engaging portion 41 of the tumbler 40 and the outer portion are not The engagement state of the cylinder 30 with the engagement groove 31 is maintained. That is, the positions of any of the engaging portions 41 in (a) to (c) of FIG.

  On the other hand, the unlocking position is a position where the engaging portion 41 retracts from the engaging groove 31 to the inside of the inner cylinder 20 (the direction of the center of the shaft) and the entire engaging portion 41 is accommodated inside the inner cylinder 20. Say That is, when the key 10 fitted in the key insertion hole 42 is inserted, the tumbler 40 is pushed down against the biasing force of the coil spring 26, so that the engagement portion 41 of the tumbler 40 is engaged with the inner side of the inner cylinder 20 from the engagement groove 31. It is drawn in (in the direction of the center of the axis). Thereby, the engagement between the inner cylinder 20 and the outer cylinder 30 is released, and the inner cylinder 20 can rotate relative to the outer cylinder 30. That is, the state in which all the engaging portions 41 shown by hatching in FIG. 2 are positioned inside the inner cylinder 20 is in the unlocked position.

  Note that, although the case where the upper engaging portion 41 of the tumbler 40 engages with the engagement groove 31 provided above the inner wall of the outer cylinder 30 is shown in FIG. A part of the front and rear parts advances and retracts so that the lower engaging portion 41 of the tumbler 40 engages with the engaging groove 31 provided on the lower side of the inner wall of the outer cylinder 30 (see FIG. 1C).

  First, as shown in FIG. 5A, in the normal locking state, the tumbler 40 is biased toward the upper outer cylinder 30 by the coil spring 26, and in the normal state, the engaging portion 41 of the tumbler 40 is engaged with the engaging groove It enters into 31. That is, the engagement portion 41 is located at the locking position, and the relative rotation of the inner cylinder 20 with respect to the outer cylinder 30 is prohibited by the engagement of the engagement portion 41 and the engagement groove 31.

  When the cylinder lock 1 is unlocked by so-called picking, insertion of a tool or the like causes the inner cylinder 20 to slightly rotate in the unlocking direction (clockwise direction in the figure) as shown in FIG. . Then, the posture of the tumbler 40 slightly changes due to the clearance C of the tumbler 40 and the inner cylinder main body 21 which are originally generated, and as a result, the tumbler 40 moves toward the inside of the inner cylinder 20. Thus, the engaging portion 41 starts moving toward the unlocking position (downward in the figure).

  However, since the lock is not performed by the key 10 conforming to the cylinder lock 1, the engaging portion 41 does not move to the unlocking position (stored in the inner cylinder 20) as shown in FIG. The inner cylinder 20 will rotate. As a result, the foremost part (right end shown by a broken line circle in the same figure (b)) of the rotation direction of the engagement portion 41 abuts on the outer cylinder 30 (the engagement groove 31), and the reverse direction (locking direction, FIG. In (b), it is pushed back in the counterclockwise direction).

  As a result, as shown in FIG. 6C, the opening end T of the retaining plate 50 is locked in the movement restricting groove 45 of the tumbler 40, and the further movement (movement in the vertical direction) of the tumbler 40 occurs. It is regulated. In the present embodiment, the movement restricting groove 45 is provided in the engaging portion 41, and the engaging portion 41 of the tumbler 40 is disengaged into the movement restricting groove 45 (before moving to the unlocking position) in the locked position. Since the open end T of the locking plate 50 is locked, the engagement between the outer cylinder 30 and the inner cylinder 20 is maintained, and the inner cylinder 20 is further rotated in the unlocking direction (and also in the locking direction). I can not do it. In this way, unauthorized unlocking due to picking can be prevented.

  As described above, in the normal unlocking operation (the unlocking operation by the key 10 fitted to the key insertion hole 42), the inner cylinder 20 rotates after the tumbler 40 is properly inserted into the inner cylinder 20. Therefore, the open end portion T of the retaining plate 50 is not locked to the movement restricting groove 45.

  As mentioned above, in this embodiment, although the case where inner cylinder exchange type cylinder lock 1, especially tumbler 40, was a disk tumbler was explained to an example, inner cylinder 20 is constituted so that exchange insertion is possible to outer cylinder 30. The same applies to the case of no cylinder lock 1 (where the tumbler 40 is a disc tumbler).

  In this case, as shown in FIG. 6, a retaining member W for the inner cylinder is provided at, for example, the rear end R of the cylinder lock 1 for restricting the removal of the inner cylinder 20 from the outer cylinder 30. The retaining member W is, for example, a nut W1, a washer W2 or the like, by which the inner cylinder 20 is fixed to the outer cylinder 30, and by disengaging the retaining member W from the outer cylinder 30 Can be taken from

  Thus, according to the present embodiment, the movement restricting groove 45 provided in the engaging portion 41 of the tumbler 40 is engaged with the locking means (for example, a part of the retaining plate 50) provided in the inner cylinder 20. Since the configuration is made to stop, unauthorized unlocking can be prevented only in the inner cylinder (inner cylinder unit) 20 without using the configuration of the outer cylinder 30.

  Therefore, when replacing from the inner cylinder replaceable cylinder lock which is not subjected to the picking countermeasure, only the inner cylinder (inner cylinder unit) 20 can be used without replacing the outer cylinder fixed to the object of locking / unlocking. It is possible to take picking countermeasures inexpensively and efficiently by replacement.

  In particular, the inner cylinder replaceable cylinder lock 1 has a great advantage in that it is not necessary to replace the outer cylinder fixed to the object of locking / unlocking originally, so the configuration of the outer cylinder is used as in the prior art. In this case, replacement of the outer cylinder is essential. However, according to the present embodiment, picking countermeasures can be taken only by replacing the inner cylinder 20 similar to the replacement of the normal inner cylinder 20.

  Furthermore, since the locking means 55 locked to the movement restricting groove 45 is a part of the retaining plate 50 for restricting the detachment of the tumbler 40 from the inner cylinder main body 21, a separate specific part is added as a picking countermeasure There is no need for this, and an increase in the number of parts can be avoided.

  Thus, according to the present embodiment, it is possible to take measures against picking simply, easily and inexpensively.

  As described above, the cylinder lock 1 of the present invention is not limited to the above example, and the movement restricting groove 45 provided in the tumbler 40 is engaged with a part of the inner cylinder (inner cylinder unit) 20 to It may be any configuration as long as the unauthorized movement of the tumbler 40 is restricted only by the unit 20.

  For example, the locking means 55 locked to the movement restricting groove 45 may not be the retaining plate 50. That is, it may not be used as a means for restricting the detachment of the tumbler 40 from the inner cylinder 20. For example, as in the conventional method for preventing tumblers from coming off, detachment (displacement) of the tumbler 40 from the inner cylinder main body 21 may be restricted by deformation (caulking) of the inner cylinder main body 21 or the like. A plate-like member may be attached as a locking means 55 in the vicinity of the outer peripheral surface of the inner cylinder main body 21 (the vicinity corresponding to the opening 51 of the retaining plate 50). Further, the locking means 55 may be formed integrally with the inner cylinder main body 21.

  Further, the movement restricting groove 45 may be provided in at least one tumbler 40.

  In addition, if the movement restricting groove 45 provided in the tumbler 40 is locked to a part of the inner cylinder (inner cylinder unit) 20 and the unauthorized movement of the tumbler 40 is restricted, the movement restricting groove 45 is The position at which is provided is not limited to the engaging portion 41.

  In addition, it is possible to rearrange the front and back of the tumbler 40.

  Moreover, the locking / unlocking system of the cylinder lock 1, the exchange system of the inner cylinder, etc. are not limited to the above, and various applications are possible according to the application etc.

  In the present invention, the cylinder lock can be used for a drawer of a desk, a lock for a cabinet, a locker or the like.

DESCRIPTION OF SYMBOLS 1 Cylinder lock 10 Key 10 A Locking / unlocking key 10 B Inner cylinder exchange key 11 Insertion portion 11 a Extension portion 13 Holding portion 20 Inner cylinder 21 Inner cylinder main body 22 Tumbler accommodation portion 23 Lock release piece accommodation portion 24 Connection portion 25 Key hole 26 Elastic member 27 Recess 30 Recess 30 Outer cylinder 31 Engage groove 40 Tambra 41 Engage part 42 Key insertion hole 45 Movement restriction groove 47 Shoulder 50 Plate-like member (retaining plate)
51 opening 52 locking release hole 53 leg 55 locking means 60 locking release piece

Claims (8)

With the outer cylinder,
An inner cylinder rotatable relative to the outer cylinder;
A locking position prohibiting relative rotation of the inner cylinder with respect to the outer cylinder, and one or more tumblers slidable at least between unlocking positions permitting relative rotation of the inner cylinder with respect to the outer cylinder A cylinder lock that is configured to have
At least one tumbler has a movement control groove,
The inner cylinder is provided with locking means that can be locked in the movement restricting groove,
A cylinder lock characterized by In the locking position, the engagement portion of the tumbler is configured to engage with the engagement groove of the outer cylinder,
The movement restricting groove is provided in the engagement portion.
The cylinder lock according to claim 1, characterized in that: The locking means is provided near the outer peripheral surface of the inner cylinder,
The cylinder lock according to claim 1 or 2, characterized in that. The locking means is a plate-like member provided on the outer peripheral surface of the inner cylinder,
The cylinder lock according to any one of claims 1 to 3, characterized in that. The locking means is a member that prevents the tumbler from being detached from the inner cylinder.
The cylinder lock according to any one of claims 1 to 4, characterized in that. The inner cylinder is configured to be insertable into the outer cylinder so as to be replaceable.
The cylinder lock according to any one of claims 1 to 5, characterized in that: In the tumbler, when there is an incorrect movement, the locking means is locked in the movement restricting groove between the locking position and the unlocking position, and movement is restricted.
The cylinder lock according to any one of claims 1 to 6, characterized in that:   The inner cylinder used for the cylinder lock as described in any one of Claims 1-7.