Disk tumbler lock

Abstract

To provide a disk tumbler lock in which the reproducibility of engagement and disengagement between a first tumbler and a second tumbler is improved.SOLUTION: In a disk tumbler lock 10, an engaging portion between a first tumbler 110 and a second tumbler 120 is formed such that a tip side of a protruding part has a narrower width than a root part, and shaped such that a recessed part corresponds to the protruding part. When the first tumbler 110 and the second tumbler 120 are disengaged, a tip part (front tip part 101) of a sub-inner cylinder 100 contacts a protrusion part 55 provided inside an outer cylinder 50, and the sub-inner cylinder 100 advances into a recessed part 56. From a state in which an abutting part 107 is disposed in a releasing part 91, the sub-inner cylinder 100 is moved in an axially perpendicular direction, and the abutting part 107 and the first tumbler 110 are brought into abutment. Thus the sub-inner cylinder 100 is relatively displaced with respect to a main inner cylinder 80 in an axial direction and in the axially perpendicular direction, making the first tumbler 110 and the second tumbler 120 become disengaged.SELECTED DRAWING: Figure 14

Description

Technical Field

[0001] The present invention relates to a disk tumbler lock capable of converting key codes.

Background Art

[0002] As a conventional disk tumbler lock, there is a disk tumbler lock (cylinder lock) previously made by the applicant. According to this, the disk tumbler lock is composed of an inner cylinder having a key insertion hole, an outer cylinder that rotatably houses and holds the inner cylinder, a lock having a lock mechanism, and a key that releases the restriction of relative rotation by the lock mechanism.

[0003] The inner cylinder includes a main inner cylinder and a sub-inner cylinder, and the lock mechanism includes a first tumbler, a second tumbler, and a sidebar.

[0004] By inserting a predetermined key into the key insertion hole, moving the second tumbler to the unlock position to release the restriction of relative rotation by the lock member, releasing the engagement of the first and second tumblers, inserting a second key instead of the predetermined key, moving only the first tumbler in a direction perpendicular to the axis, and then re-engaging the first and second tumblers, the key code can be converted.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the above-described disk tumbler lock, the first tumbler and the second tumbler are configured to move relative to each other only in the axial direction, and the clearance between the engaging portions of the first tumbler and the second tumbler is small, which may easily cause interference when engaging and disengaging the first tumbler and the second tumbler. Therefore, it has been desired to improve the reproducibility of the engagement and disengagement of the first tumbler and the second tumbler.

[0007] In view of the above circumstances, the present invention provides a disk tumbler lock that improves the reproducibility of the engagement and disengagement of the first tumbler and the second tumbler.

Means for Solving the Problems

[0008] In the invention according to claim 1, a lock including an inner cylinder having a key insertion hole, an outer cylinder that rotatably houses and holds the inner cylinder, and a lock mechanism that regulates and releases the relative rotation of the inner cylinder with respect to the outer cylinder, and a key inserted into the key insertion hole to release the regulation of the relative rotation by the lock mechanism. In the disk tumbler lock composed of: the inner cylinder includes a main inner cylinder having the key insertion hole and a sub-inner cylinder disposed opposite to the main inner cylinder; the lock mechanism includes a first tumbler disposed in the main inner cylinder and engaged with a key inserted into the key insertion hole and moved in a direction perpendicular to the axis, a second tumbler engaged with the first tumbler and disposed in the sub-inner cylinder and moved in a direction perpendicular to the axis together with the first tumbler, and a lock member that regulates and releases the relative rotation according to the movement position of the second tumbler; a cord release means for engaging and disengaging the first tumbler and the second tumbler is provided; With a predetermined key inserted into the key insertion hole, the second tumbler is moved to the unlock position via the first tumbler to release the restriction on the relative rotation by the lock member. In this state, the engagement between the first tumbler and the second tumbler is released by the code release means. After inserting a second key instead of the predetermined key and moving only the first tumbler in a direction perpendicular to the axis, the first tumbler and the second tumbler are engaged again by the code release means, enabling key code conversion so that the second tumbler can be moved to the unlock position only by the second key. When the engagement between the first tumbler and the second tumbler is released by the code release means, a locking and holding portion for receiving and holding at least a part of the second tumbler is formed in the main inner cylinder. The code release means includes a relief portion arranged near the first tumbler in the axial direction of the main inner cylinder, a contact portion arranged on the surface side of the sub-inner cylinder facing the main inner cylinder and near the second tumbler in the axial direction, a recess formed in the outer cylinder to allow the sub-inner cylinder to enter, a protrusion provided in the outer cylinder, and is provided with The engaging portion between the first tumbler and the second tumbler has one as a convex portion and the other as a concave portion. At least the tip side of the convex portion is formed with a narrower width than the base portion side, and the concave portion has a shape corresponding to the convex portion. When releasing the engagement between the first tumbler and the second tumbler, The tip of the sub-inner cylinder contacts the protrusion provided in the outer cylinder, and the sub-inner cylinder enters the recess. From the state where the contact portion is arranged in the relief portion, the sub-inner cylinder is moved in a direction perpendicular to the axis, and the contact portion and the first tumbler are brought into contact with each other, The sub-inner cylinder is configured to be relatively moved in the axial direction and the direction perpendicular to the axis with respect to the main inner cylinder to release the engagement between the first tumbler and the second tumbler.

[0009] According to this, the engaging portion between the first tumbler and the second tumbler is formed such that the width of the tip side of the convex portion is made narrower than that of the base portion side, and the concave portion has a shape corresponding to the convex portion. Then, by relatively moving the sub-inner cylinder with respect to the main inner cylinder in the axial direction and in the direction perpendicular to the axis, the clearance of the engaging portion between the first tumbler and the second tumbler is increased, making it difficult for the first tumbler and the second tumbler to interfere when engaging and disengaging, and the reproducibility of the engagement and disengagement of the first tumbler and the second tumbler can be improved.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Mode for Carrying Out the Invention

[0011] Next, embodiments of the disk tumbler lock of the present invention will be described with reference to the drawings. In FIGS. 1, 8, and 12 to 17, for ease of explanation, most of the first tumblers 110 and second tumblers 120 are omitted.

[0012] The disk tumbler lock 10 generally includes a key 20 and a lock 40 as shown in FIGS. 1 to 11 and the like.

[0013] As shown in FIGS. 11(a) to (c) and the like, the key 20 includes a gripping portion (not shown) and an insertion portion 22 connected to the gripping portion. A key groove 23 is formed on one end face of the insertion portion 22.

[0014] Another conversion key 30 has a gripping portion (not shown) and an insertion portion 32 and a key groove 33, which are the same as those of the key 20, as shown in FIGS. 11(d) to (f) and the like. The positions of the key groove 23 and the key groove 33 of the key 20 and the second key 30 are different.

[0015] As shown in FIG. 1 and the like, the lock 40 includes an outer cylinder 50 and an inner cylinder 70.

[0016] As shown in FIG. 2 and the like, the outer cylinder 50 is formed in a cylindrical shape having a storage space 51 inside, and has an insertion hole 53 at the front end through which the key 20, the second key 30, and a part of the main inner cylinder 80 to be described later can be inserted. A protruding portion 54 protruding annularly from the outer peripheral surface side toward the axis is provided.

[0017] The protruding portion 54 is provided with a protruding portion 55 formed in a substantially quadrangular frustum shape that protrudes rearward and has a top at the rear side.

[0018] On the inner peripheral surface side of the outer cylinder 50, a bottomed groove is formed from the inner peripheral surface toward the outer peripheral surface, and a recess 56 for receiving the entry of the sub-inner cylinder 100 to be described later is formed. A first lock groove 57 in a groove shape with a deeper depth for receiving the entry of the lock member 130 to be described later is further formed at the central portion of the recess 56 when viewed from the front-rear direction (axial direction).

[0019] On the inner peripheral surface side of the outer cylinder 50, on the side opposite to the concave portion 56, a second lock groove 58 is formed in a bottomed groove shape that extends from the inner peripheral surface toward the outer peripheral surface and receives the entry of a lock member 130, which will be described later.

[0020] The rear part of the storage space 51 of the outer cylinder 50 has a large-diameter portion 60 formed with a larger diameter than the front side. On the inner peripheral surface of the large-diameter portion 60, three guide convex portions 61 that project in a square column shape from the inner peripheral surface toward the axis are arranged.

[0021] The guide convex portions 61 are formed at positions and in shapes corresponding to guide concave portions 141 formed in a connection cam 140, which will be described later.

[0022] The inner cylinder 70 includes a main inner cylinder 80 and a sub-inner cylinder 100.

[0023] As shown in FIG. 3 and the like, the main inner cylinder 80 has a front portion 81, a central portion 82, and a rear portion 83, and is formed in a substantially stepped cylindrical shape.

[0024] In the main inner cylinder 80, a key insertion hole 84 into which a key 20 and insertion portions 22 and 32 of a second key 30 can be inserted is formed from the front end toward the rear.

[0025] The front portion 81 has a smaller diameter than the central portion 82, and both ends of the diameter are cut out, and is formed in a cylindrical shape that allows the insertion portions 22 and 32 of the key 20 and the second key 30 to enter.

[0026] The rear portion 83 is formed in a cylindrical shape with a smaller diameter than the central portion 82.

[0027] In the central portion 82 of the main inner cylinder 80, a sub-inner cylinder arrangement portion 85 that is arcuately cut out to allow the sub-inner cylinder 100 to be arranged is formed.

[0028] From the sub-inner cylinder arrangement portion 85, a bottomed groove is formed toward the arc on the opposite side, and a first tumbler receiving groove 86 capable of receiving the first tumbler 110 is provided. In the present embodiment, nine first tumbler receiving grooves 86 are provided along the axial direction of the main inner cylinder 80.

[0029] The first tumbler receiving groove 86 is a stepped groove having a high bottom portion 87 and a low bottom portion 88. The adjacent first tumbler receiving grooves 86 are arranged such that the high bottom portion 87 and the low bottom portion 88 are staggered when viewed from the axial direction.

[0030] In an adjacent portion 90 adjacent to the first tumbler receiving groove 86, a relief portion 91 notched to be able to receive a contact portion 107 of the sub-inner cylinder 100 described later, a locking and holding portion 92 notched to be able to receive and hold at least a part of the second tumbler 120, and an inclined surface 93 formed such that the front corner portion is inclined are provided.

[0031] As shown in FIG. 4 and the like, the sub-inner cylinder 100 has a front end portion 101, a central portion 102, and a rear end portion 103.

[0032] In FIG. 4(a), the front end portion 101 is formed in a hexagonal column shape like a home base and is slidable in contact with the protruding portion 54 and the protruding portion 55 of the outer cylinder 50.

[0033] The central portion 102 is formed in a substantially kamaboko shape that can be arranged in the sub-inner cylinder arrangement portion 85 of the main inner cylinder 80.

[0034] The rear end portion 103 is formed in a hexagonal column shape slightly smaller than the front end portion 101 and is slidable with respect to a connecting cam 140 described later.

[0035] As shown in FIGS. 8, 9, etc., in the sub-inner cylinder 100, a second tumbler receiving groove 104 is formed as a bottomed groove extending from the surface of the central portion 102 facing the main inner cylinder 80 of the sub-inner cylinder 100 toward the arc on the opposite side, and is capable of receiving the second tumbler 120. In the present embodiment, nine second tumbler receiving grooves 104 are arranged along the axial direction of the sub-inner cylinder 100.

[0036] On the surface of the central portion 102 opposite to the surface where the second tumbler receiving groove 104 of the sub-inner cylinder 100 is arranged, a through hole is formed as a through hole facing the surface where the second tumbler receiving groove 104 of the opposite sub-inner cylinder 100 is arranged, and a lock member arrangement portion 105 capable of arranging the lock member 130 is arranged.

[0037] Spring arrangement portions 106 where springs 135 are arranged are arranged near both ends of the lock member arrangement portion 105.

[0038] An abutting portion 107 is arranged on the surface side of the central portion 102 facing the main inner cylinder 80 and at a position adjacent to the second tumbler receiving groove 104 in the axial direction.

[0039] The abutting portion 107 is formed in a shape having an inclined surface 108 with a cut-off corner portion on the rear end portion 103 side. In the present embodiment, eighteen abutting portions 107 are arranged along the axial direction of the sub-inner cylinder 100.

[0040] On the surface of the central portion 102 opposite to the surface where the second tumbler receiving groove 104 of the sub-inner cylinder 100 is arranged, a stepped portion 109 protruding in an arcuate shape with a width is arranged.

[0041] As shown in FIG. 6, etc., the first tumbler 110 has a connecting groove 111 that can be connected to a connecting leg 122 to be described later, a guide protrusion 112 that is movably arranged on the low bottom portion 88, and an engaging protrusion 113 that engages with the key grooves 23, 33 of the key 20 and the second key 30.

[0042] In this embodiment, five connecting grooves 111 are formed. Also, the number of the first tumblers 110 is set to nine, and guide protrusions 112 are arranged in the first tumbler receiving grooves 86 in a staggered manner in the axial direction of the sub-inner cylinder 100.

[0043] As shown in FIG. 7 and the like, the second tumbler 120 has a lock member receiving portion 121 formed by cutting out a part so that the lock member 130 can enter, and a connecting leg 122 that can be connected to the connecting groove 111. In this embodiment, the number of the second tumblers 120 is set to nine, and the connecting leg 122 is formed by a pair of convex portions whose tip sides are formed in a semicircular shape. As a result, it is difficult for the first tumbler 110 and the second tumbler 120 to interfere with each other when engaging and disengaging.

[0044] The lock member 130 is formed in a long shape, and spring arrangement portions 131 are arranged at both ends in the longitudinal direction. In the short direction, when assembled, the outer end portion 132 arranged on the outside is in sliding contact with the inner peripheral surface of the outer cylinder 50, and the inner end portion 133 arranged on the inside is capable of sliding contact with the second tumbler 120.

[0045] By bringing both ends of the spring 135 into contact with the spring arrangement portion 106 and the spring arrangement portion 131, the lock member 130 is biased toward the inner peripheral surface of the outer cylinder 50.

[0046] As shown in FIG. 10 and the like, the connecting cam 140 is formed in an annular shape, corresponds to the guide convex portion 61 of the outer cylinder 50, and has three guide recesses 141 that are notched in a rectangular shape from the outer peripheral edge toward the inner peripheral edge. Also, the connecting cam 140 is notched in a wide arc shape and has a relief portion 142 through which the rear end portion 103 of the sub-inner cylinder 100 can enter during key conversion described later.

[0047] The connecting cam 140 is arranged so as to be in contact with the end surfaces of the large-diameter portion 60 of the outer cylinder 50 and the central portion 82 of the main inner cylinder 80.

[0048] As an assembly mode of the tablet 40 of the disk tumbler tablet 10, as shown in FIGS. 8 and 9, the first tumbler 110 is arranged in the first tumbler receiving groove 86 of the main inner cylinder 80, and the second tumbler 120 is arranged in the second tumbler receiving groove 104 of the sub-inner cylinder 100. The sub-inner cylinder 100 in which the second tumbler 120 is arranged is arranged in the sub-inner cylinder arrangement portion 85 of the main inner cylinder 80.

[0049] The lock member 130 is arranged in the lock member arrangement portion 105 of the sub-inner cylinder 100, and both ends of the spring 135 are brought into contact with the spring arrangement portion 106 and the spring arrangement portion 131 to form the inner cylinder 70.

[0050] The inner cylinder 70 is accommodated in the storage space 51 of the outer cylinder 50 and covered with the connecting cam 140, whereby the tablet 40 is assembled.

[0051] The usage mode of the disk tumbler tablet 10 will be described. In the following description, as referred to by the arrows in FIG. 12, for the upper drawings of each drawing, the upper side of the paper is the rear, the lower side of the paper is the front, and for the lower drawings, the upper side of the paper is the upper, the lower side of the paper is the lower, the left side of the paper is the left, and the right side of the paper is the right.

[0052] In normal locking and unlocking, the inner cylinder 70 can only rotate 150 degrees with respect to the outer cylinder 50 and is in a state where the key code cannot be converted. However, this state is released, and the inner cylinder 70 can rotate 180 degrees with respect to the outer cylinder 50 and is in a state where the key code can be converted.

[0053] For the switching of this state, those described in Japanese Patent Application No. 2010-32937 (Japanese Patent Laid-Open No. 2011-169007), Japanese Patent Application No. 2015-161115 (Japanese Patent Laid-Open No. 2017-40055), etc. made by the applicant can be used.

[0054] In the state of FIGS. 1 and 12[I], the disk tumbler tablet 10 is in the locked state and the key 20 is in the removed state.

[0055] At this time, the sub-inner cylinder 100 has its front end portion 101 in contact with the protruding portion 54 of the outer cylinder 50 and is located at the foremost side with respect to the outer cylinder 50 and the main inner cylinder 80. The first tumbler 110 and the second tumbler 120 have their connecting groove 111 and connecting leg 122 connected and are located on the lower side. The locking member 130 has its outer end portion 132 in a state of entering the second locking groove 58, and its inner end portion 133 is in a state of contacting the second tumbler 120, and the inner cylinder 70 is in a state where its rotation with respect to the outer cylinder 50 is restricted.

[0056] In the state of FIG. 12 [II], the disc tumbler lock 10 is in an unlocked state, and the insertion portion 22 of the key 20 is inserted.

[0057] At this time, the position of the sub-inner cylinder 100 with respect to the outer cylinder 50 and the main inner cylinder 80 has not changed. The first tumbler 110 and the second tumbler 120 have moved upward while the connecting groove 111 and the connecting leg 122 remain connected by the engagement of the key groove 23 and the engaging projection 113. The locking member 130 has its outer end portion 132 in a state of entering the second locking groove 58, and its inner end portion 133 is in a state where it can enter facing the locking member receiving portion 121 of the second tumbler 120, and the restriction on the rotation of the inner cylinder 70 with respect to the outer cylinder 50 is released.

[0058] In the state of FIG. 13 [III], the disc tumbler lock 10 is in an unlocked state and has started to turn the insertion portion 22 of the key 20.

[0059] At this time, the position of the sub-inner cylinder 100 in the front-rear direction with respect to the outer cylinder 50 and the main inner cylinder 80 has not changed. The first tumbler 110 and the second tumbler 120 have the key groove 23 and the engaging projection 113 in an engaged state while the connecting groove 111 and the connecting leg 122 remain connected. The locking member 130 has its outer end portion 132 attempting to escape from the second locking groove 58, and its inner end portion 133 has started to enter the locking member receiving portion 121 of the second tumbler 120.

[0060] In the state of FIG. 13 [IV], the disk tumbler lock 10 is in the unlocked state, and the insertion part 22 of the key 20 is in the rotating state.

[0061] At this time, the position of the sub-inner cylinder 100 in the front-rear direction with respect to the outer cylinder 50 and the main inner cylinder 80 has not changed. The first tumbler 110 and the second tumbler 120 are in an engaged state with the key groove 23 and the engaging protrusion 113 while the connecting groove 111 and the connecting leg 122 are still connected. The locking member 130 is in a state where the outer end 132 has escaped from the second locking groove 58 and is in contact with the inner peripheral surface of the outer cylinder 50, and the inner end 133 has entered the locking member receiving portion 121 of the second tumbler 120 and is in a completely stored state.

[0062] In the state of FIG. 14 [V], the disk tumbler lock 10 is in the unlocked state, and the insertion part 22 of the key 20 is in the rotating state.

[0063] At this time, the front end portion 101 of the sub-inner cylinder 100 begins to ride on the protrusion 55, and the position of the sub-inner cylinder 100 with respect to the outer cylinder 50 and the main inner cylinder 80 starts to move backward. At the same time, the stepped portion 109 enters the concave portion 56 and moves outward in the direction perpendicular to the axis. The first tumbler 110 and the second tumbler 120 are in a state where the connecting groove 111 and the connecting leg 122 are separated, and the key groove 23 and the engaging protrusion 113 are in an engaged state. The locking member 130 is in a state where the outer end 132 has entered the concave portion 56, and the inner end 133 has entered the locking member receiving portion 121 of the second tumbler 120 and is at a position slightly outside the completely stored state.

[0064] In the state of FIG. 14 [VI], the disk tumbler lock 10 is in the unlocked state, and the insertion part 22 of the key 20 has rotated 180 degrees and is in the rotation end state.

[0065] At this time, the sub-inner cylinder 100 has its front end portion 101 ride on the protrusion 55, and its rear end portion 103 enter the relief portion 142 of the connecting cam 140, and its position relative to the outer cylinder 50 and the main inner cylinder 80 has completed its backward movement. The first tumbler 110 and the second tumbler 120 remain in a separated state where the connecting groove 111 and the connecting leg 122 are disconnected, and the key groove 23 and the engaging protrusion 113 are disengaged. The locking member 130 has its outer end portion 132 enter the first locking groove 57 and its inner end portion 133 enter the locking member receiving portion 121 of the second tumbler 120, and is in a position slightly outside from the completely stored state.

[0066] Regarding the first tumbler 110 and the second tumbler 120 in FIGS. 14[V] and 14[VI], as shown in FIG. 1, the contact portion 107 of the sub-inner cylinder 100 is positioned in the relief portion 91 of the adjacent portion 90 of the main inner cylinder 80 and is disposed within the outer cylinder 50.

[0067] When the front end portion 101 of the sub-inner cylinder 100 rides on the protrusion 55, the position of the sub-inner cylinder 100 relative to the outer cylinder 50 and the main inner cylinder 80 moves backward and also moves outward in a direction perpendicular to the axis. As a result, the first tumbler 110 and the second tumbler 120 are separated and the engagement is released.

[0068] At this time, the connecting groove 111 and the connecting leg 122, which are the engaging portions between the first tumbler and the second tumbler, are formed such that the tip side of the connecting leg 122 has a semi-circular shape and is narrower in width than the base portion side, and the connecting groove 111 has a shape corresponding to the connecting leg 122. Thus, the clearance between the first tumbler 110 and the second tumbler 120 becomes larger and it is less likely for them to interfere with each other.

[0069] The contact portion 107 rides on the first tumbler 110, and the contact portion 107 and the first tumbler 110 engage smoothly via the inclined surface 108.

[0070] From the above, the disc tumbler lock 10 is in a state where the engagement between the first tumbler 110 and the second tumbler 120 is released, and is in a conversion position where the key code can be converted.

[0071] In the state of FIG. 15 [VII], the disk tumbler lock 10 is in the unlocked state. Except that the insertion part 22 of the key 20 is removed and the first tumbler 110 that has become disengaged from the key 20 has moved downward, it is the same as FIG. 12 [VII]. In other words, it can be said that it is in a rotatable state regardless of which key is inserted.

[0072] In the state of FIG. 15 [VIII], the disk tumbler lock 10 is in the unlocked state, and the insertion part 32 of the second key 30, which is different from the key 20 for converting the key code, is in the inserted state.

[0073] At this time, the front end portion 101 of the sub-inner cylinder 100 rides over the protrusion 55, and its position relative to the outer cylinder 50 and the main inner cylinder 80 has completed the backward movement. At the same time, the stepped portion 109 has entered the concave portion 56, and the movement in the direction outward perpendicular to the axis has also been completed. The first tumbler 110 and the second tumbler 120 remain in the separated state where the connecting groove 111 and the connecting leg 122 are disengaged, and the key groove 33 and the engaging protrusion 113 of the first tumbler 110 are in the engaged state. The position of the first tumbler 110 is slightly above the position when the key 20 was inserted. The lock member 130 has its outer end portion 132 entering the first lock groove 57, and its inner end portion 133 has entered the lock member receiving portion 121 of the second tumbler 120 and is in a position slightly outside the completely retracted state.

[0074] In the state of FIG. 16 [IX], the disk tumbler lock 10 is in the unlocked state, and the insertion part 32 of the second key 30 is in the rotating state.

[0075] At this time, the front end portion 101 of the sub-inner cylinder 100 begins to descend from the protrusion 55, and its position relative to the outer cylinder 50 and the main inner cylinder 80 starts to move forward. The first tumbler 110 and the second tumbler 120 are in an engaged state with the key groove 33 and the engaging protrusion 113 while the connection groove 111 and the connection leg 122 are in a separated state where the connection is released. The outer end portion 132 of the lock member 130 enters the recess 56, and the inner end portion 133 is in a position slightly outside from the completely stored state after entering the lock member receiving portion 121 of the second tumbler 120.

[0076] In the state of FIG. 16[X], the disc tumbler lock 10 is in an unlocked state, and the insertion portion 32 of the second key 30 is in a rotating state.

[0077] At this time, the front end portion 101 of the sub-inner cylinder 100 is in contact with the protruding portion 54 of the outer cylinder 50 and is located at the foremost side with respect to the outer cylinder 50 and the main inner cylinder 80. The first tumbler 110 and the second tumbler 120 are in a state where the connection groove 111 and the connection leg 122 are connected, and are in an engaged state with the key groove 33 and the engaging protrusion 113. The outer end portion 132 of the lock member 130 escapes from the recess 56 and is in contact with the inner peripheral surface of the outer cylinder 50, and the inner end portion 133 enters the lock member receiving portion 121 of the second tumbler 120 and is in a completely stored state.

[0078] The first tumbler 110 and the second tumbler 120 in FIGS. 16[IX] and 16[X] will be described in detail.

[0079] As the front end portion 101 of the sub-inner cylinder 100 descends from the protrusion 55, its position relative to the outer cylinder 50 and the main inner cylinder 80 moves forward and inward in the direction perpendicular to the axis. As a result, the first tumbler 110 and the second tumbler 120 approach and engage with each other.

[0080] At this time, the connecting groove 111 and the connecting leg 122, which are the engaging portions between the first tumbler and the second tumbler, are formed such that the tip side of the connecting leg 122 has a semicircular shape and is narrower than the base side. Since the connecting groove 111 has a shape corresponding to the connecting leg 122, the clearance between the first tumbler 110 and the second tumbler 120 increases, making it difficult for them to interfere with each other.

[0081] The abutting portion 107 descends from the first tumbler 110, and the engagement between the first tumbler 110 and the abutting portion 107 is smoothly released by the inclined surface 108.

[0082] Furthermore, as shown in FIG. 1, the abutting portion 107 of the sub-inner cylinder 100 is positioned in the relief portion 91 of the adjacent portion 90 of the main inner cylinder 80 and returns to the state of being disposed within the outer cylinder 50.

[0083] From the above, the disc tumbler lock 10 is in a position where the engagement state between the first tumbler 110 and the second tumbler 120 is maintained and the key code cannot be converted.

[0084] In the state of FIG. 17 [XI], the disc tumbler lock 10 is in the unlocked state, and the insertion portion 32 of the second key 30 is in a state of being rotated 180 degrees.

[0085] At this time, the position of the sub-inner cylinder 100 relative to the outer cylinder 50 and the main inner cylinder 80 has not changed. The first tumbler 110 and the second tumbler 120 are engaged with the key groove 33 and the engaging protrusion 113 while the connecting groove 111 and the connecting leg 122 are connected. The locking member 130 is in a state where the outer end portion 132 has entered the second locking groove 58, and the inner end portion 133 is in a state where it can enter facing the locking member receiving portion 121 of the second tumbler 120. The regulation on the rotation of the inner cylinder 70 relative to the outer cylinder 50 is released.

[0086] In the state of FIG. 17 [XII], the disc tumbler lock 10 is in the locked state, and the second key 30 has been removed.

[0087] At this time, the front end portion 101 of the sub-inner cylinder 100 is in contact with the protruding portion 54 of the outer cylinder 50 and is located at the frontmost side with respect to the outer cylinder 50 and the main inner cylinder 80. The first tumbler 110 and the second tumbler 120 are located on the lower side with the connecting groove 111 and the connecting leg 122 connected. The outer end portion 132 of the lock member 130 is in a state of entering the second lock groove 58, and the inner end portion 133 is in a state of contacting the second tumbler 120, and the inner cylinder 70 is in a state of being restricted from rotating with respect to the outer cylinder 50.

[0088] Through the above operations, the key code conversion is performed.

[0089] The disc tumbler lock 10 having the above configuration includes an inner cylinder 70 having a key insertion hole 84, an outer cylinder 50 that rotatably houses and holds the inner cylinder 70, and a lock 40 having a lock mechanism for restricting and releasing the relative rotation of the inner cylinder 70 with respect to the outer cylinder 50, and a key inserted into the key insertion hole 84 to release the restriction of relative rotation by the lock mechanism. In the disc tumbler lock, The inner cylinder 70 is configured to include a main inner cylinder 80 having a key insertion hole 84 and a sub-inner cylinder 100 disposed opposite to the main inner cylinder 80. The lock mechanism includes a first tumbler 110 disposed in the main inner cylinder 80 and engaged with a key inserted into the key insertion hole 84 and moved in a direction perpendicular to the axis, a second tumbler 120 engaged with the first tumbler 110 and disposed in the sub-inner cylinder 100 and moved in a direction perpendicular to the axis together with the first tumbler 110, and a lock member 130 that restricts and releases relative rotation according to the movement position of the second tumbler 120. It is provided with a code release means for engaging and disengaging the first tumbler 110 and the second tumbler 120. With a predetermined key 20 inserted into the key insertion hole 84 and the second tumbler 120 moved to the unlock position via the first tumbler 110 to release the restriction on relative rotation by the lock member 130, the engagement between the first tumbler 110 and the second tumbler 120 is released by the code release means. After inserting a second key 30 instead of the predetermined key 20 and moving only the first tumbler 110 in a direction perpendicular to the axis, the first tumbler 110 and the second tumbler 120 are engaged again by the code release means, enabling the second key 30 alone to move the second tumbler 120 to the unlock position, so that the key code can be converted. When the engagement between the first tumbler 110 and the second tumbler 120 is released by the code release means, a locking and holding portion 92 that receives and holds at least a part of the second tumbler 120 is formed in the main inner cylinder 80. The code release means includes a relief portion 91 arranged in the vicinity of the first tumbler 110 in the axial direction of the main inner cylinder 80, a contact portion 107 arranged on the surface side of the sub-inner cylinder 100 facing the main inner cylinder 80 and in the vicinity of the second tumbler 120 in the axial direction, a recess 56 arranged in the outer cylinder 50 so that the sub-inner cylinder 100 can enter, a protrusion 55 provided in the outer cylinder 50, and is provided with The engaging portion between the first tumbler 110 and the second tumbler 120 has one as a convex portion and the other as a concave portion. At least the tip side of the convex portion is formed with a narrower width than the base portion side, and the concave portion has a shape corresponding to the convex portion. When releasing the engagement between the first tumbler 110 and the second tumbler 120, the tip portion (front end portion 101) of the sub-inner cylinder 100 contacts the protrusion 55 provided in the outer cylinder 50, and the sub-inner cylinder 100 enters the recess 56. From the state where the contact portion 107 is arranged in the relief portion 91, the sub-inner cylinder 100 is moved in a direction perpendicular to the axis, and the contact portion 107 and the first tumbler 110 are brought into contact with each other, The sub-inner cylinder 100 is configured to move relative to the main inner cylinder 80 in the axial direction and in a direction perpendicular to the axis, so as to release the engagement between the first tumbler 110 and the second tumbler 120.

[0090] According to this, in the engaging portion between the first tumbler 110 and the second tumbler 120, the tip side of the convex portion is formed to have a narrower width than the base portion side, and the concave portion has a shape corresponding to the convex portion. By moving the sub-inner cylinder 100 relative to the main inner cylinder 80 in the axial direction and in a direction perpendicular to the axis, the clearance of the engaging portion between the first tumbler 110 and the second tumbler 120 is increased, making it difficult for the first tumbler 110 and the second tumbler 120 to interfere when engaging and disengaging, and improving the reproducibility of the engagement and disengagement between the first tumbler 110 and the second tumbler 120.

[0091] The disk tumbler tablet 10 of the present invention is not limited to the above configuration. That is, various design changes and the like are possible without departing from the gist of the present invention.

[0092] For example, mechanisms such as the half-insertion prevention means and the portion connected to the rear portion 83 of the main inner cylinder 80 can use those described in Japanese Patent Application No. 2010-32937 (Japanese Patent Laid-Open No. 2011-169007) and Japanese Patent Application No. 2015-161115 (Japanese Patent Laid-Open No. 2017-40055) previously filed by the applicant.

[0093] Also, it is possible to reverse the concavities and convexities of the engaging portion between the first tumbler 110 and the second tumbler 120.

[0094] Also, as long as at least the tip side of the connecting leg 122 is formed to have a narrower width than the base portion side, the shape of the connecting leg 122 can be appropriately changed to a C shape, a tapered shape, etc. Accordingly, the connecting groove 111 can also be appropriately shaped to correspond to the connecting leg 122.

Explanation of Reference Numerals

[0095] 10 Disk tumbler tablet 20 Key 30 Second key 40 Tablet 50 Outer cylinder 55 Protrusion 56 Recess 70 Inner cylinder 80 Main inner cylinder 84 Key insertion hole 91 Relief portion 92 Locking and holding portion 100 Sub-inner cylinder 107 Contact portion 110 First tumbler 120 Second tumbler 130 Locking member

Claims

【Claim 1】 A disk tumbler lock comprising: an inner cylinder having a key insertion hole; an outer cylinder that rotatably houses and holds the inner cylinder; and a lock mechanism that restricts and releases relative rotation of the inner cylinder with respect to the outer cylinder, and a key inserted into the key insertion hole to release the restriction of the relative rotation by the lock mechanism. In the disk tumbler lock, the inner cylinder is configured to include a main inner cylinder having the key insertion hole and a sub-inner cylinder disposed opposite to the main inner cylinder, the lock mechanism includes a first tumbler disposed within the main inner cylinder and engaged with a key inserted into the key insertion hole to be moved in a direction perpendicular to the axis, a second tumbler engaged with the first tumbler and disposed within the sub-inner cylinder to be moved in a direction perpendicular to the axis together with the first tumbler, and a lock member that restricts and releases the relative rotation according to the movement position of the second tumbler, a cord release means for engaging and disengaging the first tumbler and the second tumbler, with a predetermined key inserted into the key insertion hole, the second tumbler is moved to the unlock position via the first tumbler to release the restriction of the relative rotation by the lock member, and the engagement between the first tumbler and the second tumbler is released by the cord release means. After inserting a second key instead of the predetermined key and moving only the first tumbler in a direction perpendicular to the axis, the first tumbler and the second tumbler are re-engaged by the cord release means, so that the second tumbler can be moved to the unlock position only by the second key, enabling key code conversion, when the engagement between the first tumbler and the second tumbler is released by the cord release means, a locking and holding portion for receiving and holding at least a part of the second tumbler is formed in the main inner cylinder, the cord release means includes a relief portion disposed in the vicinity of the first tumbler in the axial direction of the main inner cylinder, a contact portion disposed on the surface side of the sub-inner cylinder facing the main inner cylinder and in the vicinity of the second tumbler in the axial direction, a recess disposed in the outer cylinder to allow the sub-inner cylinder to enter, a protrusion provided in the outer cylinder, and is provided with the engaging portion between the first tumbler and the second tumbler has one as a convex portion and the other as a concave portion, at least the tip side of the convex portion is formed to be narrower than the original portion side, and the concave portion has a shape corresponding to the convex portion. When releasing the engagement between the first tumbler and the second tumbler, the tip of the sub-inner cylinder contacts a protrusion provided inside the outer cylinder, the sub-inner cylinder enters the recess, and from the state where the contact portion is arranged in the relief portion, the sub-inner cylinder is moved in a direction perpendicular to the axis, and by bringing the contact portion into contact with the first tumbler, a disk tumbler lock characterized in that the sub-inner cylinder is configured to relatively move in the axial direction and in a direction perpendicular to the axis with respect to the main inner cylinder to release the engagement between the first tumbler and the second tumbler.

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