JP3898036B2 - Cylinder lock - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder lock, and more specifically, a key different from a normal key can be used as a construction key, and an unauthorized unlocking by a construction key after unlocking using the normal key and an abnormal key are used. The present invention relates to a cylinder lock that can prevent unauthorized unlocking.
[0002]
[Prior art]
Conventionally, cylinder locks have been used for various locks of automobiles and doors of buildings. In general, the cylinder lock is configured such that a cylinder provided with a tumbler can be inserted into and removed from the case, and the tumbler protrudes from the outer peripheral surface of the cylinder in a normal state. It is engaged with the engagement groove formed on the inner peripheral surface of the case, but by inserting a valid key plate into the cylinder, all the tumblers are retracted into the cylinder and the engagement between the tumbler and the case is released. The key is rotated while the legitimate key is inserted into the cylinder and all the tumblers are retracted into the cylinder, so that the cylinder is rotated with respect to the case and unlocked.
[0003]
The conventional cylinder lock will be described in detail with reference to the drawings. FIG. 16 is a cross-sectional view for explaining the structure of a conventionally used cylinder lock 31, and 32 in the figure is a case. The case 32 is mounted inside the door when used, and a cylindrical cylinder body 33 having a joint 34 connected to the key body at the tip is rotatable inside the case 32 when used. It is equipped and can be unlocked by rotating the cylinder body 33.
[0004]
Here, the cylinder body 33 will be described. FIG. 17 is a view showing the cylinder body 33 in an exploded state and a key plate 39 inserted into the cylinder body 33. The cylinder body 33 includes the joint portion 34. An elongated keyhole 35 is formed in the axial direction from the opposite side to the side, and a plurality of slit-shaped tumbler insertion holes 36 are formed at predetermined intervals in a direction perpendicular to the keyhole 35. Is formed.
[0005]
A tumbler 37 is inserted into each of the tumbler insertion holes 36, and the tumbler 37 is biased by a spring 38 in a direction protruding from the outer periphery of the cylinder body 33.
[0006]
Here, FIG. 18 is a cross-sectional view showing a portion of the tumbler insertion hole 36 in a state where the tumbler 37 is inserted into the tumbler insertion hole 36 from the axial direction of the cylinder lock 31. In FIG. A step 3702 is formed, and a convex portion 3703 is formed on the other side.
[0007]
On the other hand, a locking portion 3601 is formed in the tumbler insertion hole 36, and a guide groove 3602 is formed on the side facing the locking portion 3601, and the tumbler 37 is connected to the step portion 3702. The spring 38 mounted between the engaging portion 3601 is urged in a direction protruding from the outer periphery of the cylinder body 33, and its movement is restricted to a range in which the convex portion 3703 is guided by the guide groove 3602. ing.
[0008]
In addition, the tumbler 37 is formed with a window 3701 through which the key plate 39 penetrates. As is clear from FIG. 16, the window 3701 in each tumbler 37 has a lower end position that does not coincide. Thus, when all the tumblers 37 are retracted into the tumbler insertion hole 36, the lower end portion of the window portion 3701 is wave-shaped.
[0009]
On the other hand, an engagement groove 3201 is formed in the inner periphery of the case 32 along the axial direction of the cylinder body 33. Engage with the groove 3201, thereby preventing rotation of the cylinder body 33.
[0010]
When the key plate 39 provided with the notch 3901 that can be aligned with the lower end of the window 3701 in a state where all of the tumbler 37 is retracted in the cylinder body 33 is inserted into the key hole 35 in the cylinder body 33, All the tumblers 37 are retracted into the cylinder main body 33 and the engagement with the engagement grooves 3201 in the case 32 is released, whereby the cylinder main body 33 can be rotated with respect to the case 32, and the key plate 39 is moved in this state. When rotated, the cylinder body also rotates, and can be unlocked.
[0011]
[Problems to be solved by the invention]
By the way, in the conventional cylinder lock, it is possible to unlock by rotating the cylinder directly connected to the key body through the joint with respect to the case, and in the normal state, the tumbler and the case Since the rotation of the cylinder is prevented by the engagement with, unauthorized unlocking by picking is easy.
[0012]
Here, a general picking technique will be explained. When picking, the tumbler is positioned by inserting tweezers or the like from the keyhole while maintaining the state while applying pressure in the rotational direction to the cylinder. Adjust. Then, when the position of the window on the tumbler matches the notch on the key plate and all the tumblers are retracted into the cylinder and the engagement between the cylinder and the case is released, the pressure in the rotational direction is always applied to the cylinder. Since the cylinder is added, the cylinder can be rotated and unlocked. Therefore, in the case of the conventional cylinder lock that prevents the rotation of the cylinder only by the engagement between the tumbler and the case and connects the cylinder directly to the door body, the picking is completed even if the number of tumblers is increased. It is difficult to prevent.
[0013]
In addition, with the conventional cylinder lock that prevents rotation of the cylinder only by engagement between the tumbler and the case, even if an incorrect key with a notch aligned is used, this will force the cylinder It is also possible to rotate it.
[0014]
In addition, especially in the case of a new construction such as a house, a construction key is prepared for the construction contractor to enter the room, and this construction key has the same notch as the normal key. However, as described above, in order to retract all tumblers into the cylinder, a key with a notch that is aligned with the lower end position of the tumbler window is used. A board must be used, and it is impossible to make the construction key different from the normal key.
[0015]
Therefore, the present invention is capable of preventing unauthorized unlocking, enabling a key different from the normal key to be used as a construction key, and further disabling the use of the construction key after unlocking with the normal key. It is an object to provide a cylinder lock that can be used.
[0016]
[Means for Solving the Problems]
The cylinder lock of the present invention includes an outer case, an inner ring that is rotatably provided in the outer case, and a joint portion that is rotatably provided in the inner ring at a substantially central portion of the tip. A cylinder, a rotary plate that is detachably attached to the front end surface of the inner ring, has a through hole formed in a substantially central portion, and has a notch formed in an arbitrary portion of the peripheral portion, and the rotary plate A lock joint that is engaged and has a tip portion that passes through the through hole in the rotary plate and is connected to the joint portion of the cylinder; and an elastic member that biases the lock joint toward the rotary plate. And pressing the rotary plate toward the lock joint against the urging force of the elastic member A releasable and the cylinder lock the connection between the more the locking joint a joint portion of the cylinder,
The inner ring has a tumbler engaging groove on the inner peripheral surface, and has an outer inner ring having a protrusion that can be fitted in a notch formed in the rotary plate, and a rotation in the outer inner ring. And a tumbler engaging groove that is continuous with the tumbler engaging groove when it is inserted into the outer inner ring, and is fitted in a notch formed in the rotary plate. An inner ring with a protrusive projection at the tip and an irregular surface on the inner surface of the tip, and when the inner inner ring is positioned so that the tip is substantially equal to the tip of the outer inner ring. The inner inner ring is engaged with the outer inner ring to rotate the inner inner ring with respect to the outer inner ring and the front-rear direction. And a engaging means for inhibiting movement of
The cylinder includes a protrusion formed at an arbitrary position around the joint, a key hole formed in the axial direction, a plurality of tumbler insertion holes formed so as to intersect the key hole, and respective tumbler insertions. A tumbler that is removably inserted into the hole, and when the key plate is not inserted into the key hole, the tumbler projects toward the inner surface of the inner ring and engages with a tumbler engaging groove formed in the inner ring. This makes it impossible to rotate with respect to the inner ring.On the other hand, when a key plate is inserted into the key hole, the tumbler is retracted from the inner ring inner surface so that it can rotate with respect to the inner ring. Yes.
[0017]
In the cylinder lock of the present invention, an inner ring is rotatably interposed between the outer case and the cylinder, and when the engagement between the inner ring and the cylinder is released, the cylinder can be rotated, and the inner ring and In the case where the engagement with the cylinder is not released, when pressure is applied to the cylinder in the rotating direction, the inner ring rotates together with the cylinder.
[0018]
Here, the rotary plate is removably attached to the tip of the inner ring, and the rotary plate has a lock joint whose other end is connected to the key body, and the tip of the rotary plate penetrates the rotary plate. The lock joint is urged toward the rotary plate by an elastic member so as to be connected to the joint portion of the cylinder through the hole. Then, the connection between the lock joint and the joint portion of the cylinder is released by pressing the rotary plate to the lock joint side against the urging force of the elastic member.
[0019]
On the other hand, a notch is formed in the rotary plate, and a protrusion that fits into the notch of the rotary plate is formed at the tip of the inner ring when the rotary plate is attached to the tip of the inner ring. ing.
[0020]
Therefore, when the inner ring rotates together with the cylinder by forcibly applying pressure in the rotation direction to the cylinder with an unauthorized key, etc., the protrusions on the inner ring and the notches in the rotary plate are disengaged, The rotary plate rides on the protrusion of the inner ring, so that the rotary plate moves to the lock joint side against the urging force of the elastic member. Then, the connection between the lock joint and the joint portion of the cylinder is released, which causes the cylinder to idle, making it impossible to unlock.
[0021]
Further, in the cylinder lock of the present invention, the inner ring is composed of the outer inner ring and the inner inner ring, and the inner inner ring is configured so that the tip of the inner ring is substantially equal to the tip of the outer inner ring. Only the inner inner ring is engaged with the outer inner ring and is provided with engagement means for preventing the inner inner ring from rotating and moving in the front-rear direction with respect to the outer inner ring. In a state where the portion is retracted from the tip of the outer inner ring, the inner inner ring is rotatable with respect to the outer inner ring.
[0022]
On the other hand, a concavo-convex portion is formed on the inner surface side of the distal end portion of the inner inner ring, and a projection portion that can be fitted into the concave portion of the concavo-convex portion is provided at the distal end portion of the cylinder.
[0023]
Therefore, in the initial state, by retracting the inner inner ring and making the inner inner ring rotatable with respect to the outer inner ring, a notch portion that can retract only the tumbler engaged with the outer inner ring into the cylinder is provided. It is possible to use the key plate which has as a construction key. That is, in such a case, since the engagement between the tumbler and the inner inner ring is not released, the inner inner ring also rotates with the rotation of the cylinder, but the tip of the inner inner ring recedes from the tip of the outer inner ring. The inner ring is rotatable relative to the outer inner ring, so even if the inner ring rotates with the rotation of the cylinder, the entire inner ring does not rotate, which affects the position of the rotary plate. There is no.
[0024]
On the other hand, when the cylinder is rotated using a normal key that can retract all the tumblers into the cylinder, the protruding part of the cylinder rides on the convex part on the inner surface of the inner inner ring tip and the inner inner ring moves forward. As a result, the front end portion is almost at the same position as the outer inner ring, and as a result, the engaging means act and the inner inner ring is engaged with the outer inner ring, and the inner inner ring rotates relative to the outer inner ring and moves back and forth. Movement is prevented.
[0025]
Then, in this state, if an attempt is made to unlock the key plate having a notch that can be retracted into the cylinder only by the tumbler engaged with the outer inner ring, the above-mentioned unauthorized unlocking is performed. As with the case, the entire inner ring rotates together with the cylinder, which makes it impossible to unlock the cylinder and the lock joint.
[0026]
Thus, according to the cylinder lock of the present invention, a different key can be used as a construction key before the normal key is used, and unlocking with the construction key is impossible after the normal key is used. Therefore, it is possible to effectively prevent misuse by the construction key.
[0027]
In addition, when unauthorized unlocking is attempted using an abnormal key different from the normal key, or when pressure is applied to the cylinder for picking, etc., the inner ring also rotates together with the cylinder, which causes the lock joint and cylinder to rotate. Since the cylinder is idled and the cylinder is idled, it is possible to effectively prevent illegal unlocking by picking and unauthorized keys.
[0028]
【Example】
An embodiment of the cylinder lock of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are partial sectional views showing the structure of the cylinder lock 1 of the present embodiment along the axial direction. Is an outer case.
[0029]
Here, FIG. 4 is a perspective view showing the outer case 2, and the outer case 2 in the present embodiment has a hollow, substantially cylindrical shape, and a decorative ring (not shown) near the outer periphery of the tip portion. The screw part 201 for mounting | wearing is formed. In addition, a screw hole 203 for screwing the cylinder lock 1 to a door or the like is formed on the distal end surface, and a pair of engagement grooves 202 are formed.
[0030]
In the cylinder lock 1 according to the present embodiment, the inner ring 3 is rotatably provided in the outer case 2, and the cylinder 6 is further provided in the inner ring 3.
[0031]
That is, FIG. 5 is a perspective view showing the inner ring 3. In this embodiment, the inner ring 3 is constituted by an outer inner ring 4 and an inner inner ring 5 inserted into the outer inner ring 4. .
[0032]
Here, FIG. 6 is a view showing a cross section along the axial direction of the inner ring 3, FIG. 7 is an exploded view of the inner ring 3, and the outer inner ring 4 has a cylindrical shape and has an inside thereof. Is provided with an engaging portion 401 provided with an engaging groove 402 along the axial direction at an opposing position up to an arbitrary length in the axial direction. In addition, a pair of chevron projections 403 is formed at the tip, and an engagement hole 404 is formed on the inner peripheral side near the tip.
[0033]
On the other hand, the inner inner ring 5 has an outer diameter that can be inserted into the outer inner ring 4 and an engagement groove 402 formed in the outer inner ring 4 when the inner inner ring 5 is inserted into the outer inner ring 4. A continuous engagement groove 501 is formed at an opposite location, and its full length is the tip when it is inserted into the outer inner ring 4 so as to contact the engagement portion 401 of the outer inner ring 4. The portion is set to be slightly retracted to the insertion side from the tip end portion of the outer inner ring 4.
[0034]
Further, a chevron protrusion 502 having substantially the same shape as the chevron protrusion 403 formed on the outer inner ring 4 is formed at the tip of the inner ring 5.
[0035]
Further, on the outer peripheral side in the vicinity of the tip, the inner inner ring 5 is inserted into the outer inner ring 4 when the inner inner ring 5 is inserted into the outer inner ring 4 so that the tip position is the same as the tip position of the outer inner ring 4. An engagement hole 503 is formed at a position corresponding to the formed engagement hole 404, and a spring 505 is provided in the engagement hole 503. In use, a spherical object 504 serving as an engagement means has a certain degree. It is mounted in the engagement hole 503 so as to protrude.
[0036]
Furthermore, the front end portion 506 is closed and a through hole 507 is formed at a substantially central portion thereof, and a convex portion 508 and a concave portion 509 are formed adjacent to each other on the inner surface of the front end portion 506. . FIG. 8 is a view showing the inner portion of the tip 506. In this embodiment, the boundary between the convex portion 508 and the concave portion 509 is tapered.
[0037]
In the initial state, the inner inner ring 5 is inserted into the outer inner ring 4 so as to contact the engaging portion 401 of the outer inner ring 4 (see FIG. 2). In this state, The spherical object 504 is pressed toward the engagement hole 503 by the inner wall of the outer inner ring 4, and the inner inner ring 5 can freely rotate with respect to the outer inner ring 4.
[0038]
On the other hand, by using a normal key, which will be described later, the inner inner ring 5 is advanced by a mechanism, which will be described later, so that the tip position thereof is substantially the same as the tip position of the outer inner ring 4, and at the same time, the spherical object 504 protrudes. The portion is engaged in an engagement hole 404 formed on the inner peripheral side in the vicinity of the distal end portion of the outer inner ring, whereby the inner inner ring 5 is fixed to the outer inner ring 4 and thereafter free rotation is impossible. .
[0039]
As described above, in the present embodiment, the protrusions 403 and 502 formed on the outer inner ring 4 and the inner inner ring 5 are mountain-shaped protrusions. However, the protrusions 403 and 502 are not necessarily mountain-shaped, and may have other shapes. .
[0040]
Next, the cylinder 6 will be described. FIG. 9 is a perspective view showing the cylinder 6, FIG. 10 is an exploded perspective view of the cylinder 6, and 601 is a cylinder body in the figure. The cylinder body 601 has a substantially cylindrical shape, and a key hole 603 for inserting a key plate is formed along the axial direction. Further, a joint portion 602 protrudes from the tip portion, specifically, the side opposite to the side where the key plate is inserted, and this joint portion 602 is inserted into the through hole 507 of the inner inner ring 5 in use. The cylinder 6 is inserted and connected to a lock joint which will be described later, and unlocking is possible by rotating the cylinder 6.
[0041]
Further, a plurality of tumbler insertion holes 606 are formed so as to cross the key hole 603. In the present embodiment, the tumbler insertion holes 606 are through holes penetrating the cylinder body 601. The tumbler 7 is inserted into the tumbler insertion hole 606 so as to be insertable / removable, and the tip of the tumbler 7 is engageable with engagement grooves 402 and 501 formed on the inner periphery of the inner ring 3. Has been.
[0042]
Here, the tumbler 7 has a plate shape, and a window portion 701 is formed in the vicinity of the center thereof. And the window part 701 of each tumbler 7 is formed so that the lower end position of the window part of at least all the tumblers does not coincide, and similarly to the tumbler 37 used in the conventional cylinder lock 31 described above, When all the tumblers 7 are inserted into the tumbler insertion holes 606, the lower end portion of the window portion 701 is configured to be corrugated.
[0043]
Further, a step portion 702 is formed on one side of each tumbler 7 and a convex portion 703 is formed on the other side, while a locking portion 604 is formed in the tumbler insertion hole 606. In addition, a guide groove 605 is formed on the side facing the locking portion 604, and when the tumbler 7 is inserted into the tumbler insertion hole 606, it is mounted between the stepped portion 702 and the locking portion 604. The tumbler 7 is urged by the spring 704 so as to protrude from the outer periphery of the cylinder 6. On the other hand, the movement range of the tumbler 7 is restricted to a range in which the convex portion 703 can move in the guide groove 605. FIG. 11 is a diagram for explaining this relationship. In the figure, the tumbler 7 is inserted into the tumbler insertion hole 606 so as to be insertable / removable in the direction of the arrow.
[0044]
Note that the cylinder 6 used in this embodiment has the same structure as the previously used cylinder lock, that is, all of the tumbler 7 is retracted into the tumbler insertion hole 606 of the cylinder 6 by this structure. Only the key plate having the notch aligned with the lower end position of the window portion 701 of each tumbler 7 in the state is used as a normal key. When this normal key is inserted into the key hole 603, all the tumblers 7 are connected to the cylinder 6 Is retracted into the tumbler insertion hole 606, thereby enabling the cylinder 6 to rotate.
[0045]
On the other hand, when a key plate other than the normal key (hereinafter referred to as “abnormal key”) is inserted into the key hole 603, all the tumblers 7 cannot be retracted into the cylinder 6. The tip of the tumbler 7 that cannot be retracted inside engages with the engaging grooves 402 and 501 formed on the inner periphery of the inner ring 3, and even if the abnormal key is rotated in this state, only the cylinder can be rotated. In such a case, the inner ring 3 is also rotated together with the cylinder 6.
[0046]
In the present embodiment, as shown in FIG. 10, the cylinder 6 allows eight tumblers 7 to be inserted into the cylinder body 601, and four of them from the upper side of the cylinder body 601 to the other Although four sheets are inserted from the lower side of the cylinder main body 601, it is not always necessary to do so, and it is only necessary to insert a plurality of tumblers into the cylinder main body so as to be insertable / removable.
[0047]
Next, a protrusion 607 is formed at the tip of the cylinder 6 so as to be adjacent to the joint 602. In this embodiment, the protrusion 607 is rounded at the tip. In the initial state (see FIG. 2), the cylinder 6 is inserted into the inner ring 3 such that the tip 607 is fitted in the recess 509 inside the tip of the inner inner ring 5. Then, when only the cylinder 6 is rotated using the normal key in this state, the protrusion 607 rides on the convex portion 508 inside the tip end portion of the inner inner ring 5, thereby causing the inner inner ring 5 in the free state to move forward, When the front end position of the inner inner ring 5 becomes substantially the same position as the front end position of the outer inner ring 4, the protruding portion of the spherical object 504 is in the engagement hole 404 formed on the inner peripheral side near the front end portion of the outer inner ring. As a result, the inner inner ring 5 is restrained against rotation with respect to the outer inner ring 4.
[0048]
Accordingly, in an initial state in which the inner inner ring is free, only the tumbler 7 that engages with the engaging groove 402 of the outer inner ring 4 is a key plate having a notch that can be retracted into the cylinder 6 (hereinafter referred to as “construction key”). .) Can be used to rotate the cylinder 6 together with the inner inner ring 5, thereby unlocking it.
[0049]
On the other hand, after using the normal key, as described above, the free rotation of the inner inner ring 5 is prevented, and the inner inner ring 5 rotates only together with the outer inner ring 4. Even when used, it is impossible to rotate only the cylinder 6.
[0050]
Next, in FIG. 1, 8 is a rotary plate. In this embodiment, the rotary plate 8 has a through-hole 801 at the center and a pair of peripheral holes as shown in the perspective view of FIG. A notch 802 and a pair of convex portions 803 are formed, and are detachably attached to the front end surface of the inner ring 3 in such an arrangement that the convex portions 803 fit into the engaging grooves 202 in the outer case 2. Movement in the direction of rotation is blocked.
[0051]
Further, in a normal state, the rotary plate 8 is arranged such that the mountain-shaped protrusions 403 and 502 formed at the tip of the inner ring 3 fit in the pair of notches 802. When the inner ring 3 rotates in this state, the chevron protrusions 403 and 502 are detached from the notches 802, and the rotary plate 8 rides on the chevron protrusions 403 and 502. As a result, the rotary plate 8 moves forward in the opposite direction to the inner ring 3.
[0052]
Next, in FIG. 1, reference numeral 9 denotes a lock joint. The lock joint 9 includes a jaw portion 901 that comes into contact with the periphery of the through hole 801 of the rotary plate 8, and the jaw portion 901 includes the rotary plate. The joint portion 902 having a diameter that can penetrate the eight through holes 801 is connected, and the jaw portion 901 is brought into contact with the periphery of the through hole 801 of the rotary plate 8, whereby the joint portion 902 that penetrates the through hole 801 is connected to the cylinder 6. The structure is connected to the joint portion 602, and a connecting portion 903 connected to the key body is provided on the side facing the joint portion 902.
[0053]
As shown in a sectional view in FIG. 14 and in an exploded view in FIG. 13, the lock joint 9 has a jaw plate 901 near the cover plate 11 mounted in the vicinity of the tip of the outer case 2. The pressed spring 10 is biased toward the rotary plate 8 side. Therefore, when the rotary plate 8 moves to the lock joint 9 side in this state, the lock joint 9 moves to the cover plate 11 side so as to oppose the urging force of the spring 10, thereby the joint portion 902 of the lock joint 9. And the joint portion 602 of the cylinder 6 are released, and even if the cylinder 6 is rotated in this state, the lock joint 9 cannot be rotated and unlocking becomes impossible. FIG. 3 is a partial cross-sectional view showing the structure along the axial direction in this state.
[0054]
That is, in the cylinder lock 1 of the present embodiment, as described above, all the tumblers 7 are not retracted into the cylinder 6, that is, the cylinder 6 and the inner ring 3 are not completely disengaged. Construction that can only release the engagement between the outer inner ring 5 and the cylinder 6 after the outer inner ring 4 and the inner inner ring 5 are united by applying pressure in the rotation direction to the cylinder or by using a normal key When the key is used, the cylinder 6 and the inner ring 3 rotate together. In such a case, the chevron formed at the tip of the inner ring 3 as the inner ring 3 rotates. 403 and 502 are removed from the notch 802 of the rotary plate 8, so that the rotary plate 8 is made to have the chevron projections 403 and 502. Together it becomes dressed ride on, thereby moving the lock joint 9 in the insertion direction to move the lock joint 9 side. As a result, the connection between the lock joint 9 and the cylinder 6 is released, making it impossible to perform unauthorized unlocking.
[0055]
Next, the operation of the cylinder lock of the present embodiment will be described. As described above, in the initial state of the cylinder lock 1 of the present embodiment, the inner inner ring 5 is connected to the distal end portion of the outer inner ring 4 from the distal end portion. Also, the angled projection 403 of the outer inner ring 4 is fitted into the notch 802 of the rotary plate 8, and the protrusion 607 of the cylinder 6 is further connected to the inner inner ring. It is made to fit in the recessed part 509 inside the front-end | tip part 506 of 4th. FIG. 2 is a partial cross-sectional view showing the structure along the axial direction in this state, which is a construction key state.
[0056]
In this state, if a construction key having a cutout portion in which only the tumbler 7 engaged with the engaging groove 402 of the outer inner ring 4 can be retracted into the cylinder 6 is used, the cylinder 6 rotates together with the inner inner ring 5. Thus, the lock joint 9 can be rotated and unlocked. Therefore, in this initial state, a key different from the normal key can be used as the construction key.
[0057]
Next, when a normal key having a notch that can retract all the tumblers 7 into the cylinder 6 is used, only the cylinder 6 rotates and the inner inner ring 5 moves forward by the mechanism described above. It is integrated with the outer inner ring 3. FIG. 1 is a partial sectional view showing the structure along the axial direction in this state, which is a normal key state.
[0058]
In this state, if an abnormal key is used, a construction key is used, or pressure is applied to the cylinder 6 in a state where the tumbler 7 is not completely inserted into the cylinder 6, the inner ring together with the cylinder 6 is used. 3 rotates, and the rotary plate 8 rides on the mountain-shaped protrusions 403 and 502 of the inner ring 3. As a result, the rotary plate 8 moves to the lock joint 9 side and the lock joint 9 also moves in the direction of the spring 10. The connection between the cylinder 9 and the cylinder 6 is released, and it is impossible to unlock even if the cylinder 6 is rotated. FIG. 3 is a partial cross-sectional view showing the structure along the axial direction in this state, which is an abnormal key state.
[0059]
Thus, in the cylinder lock of this embodiment, a key different from the normal key can be used as a construction key, and after the normal key is used, it cannot be unlocked using this construction key. It is possible to effectively prevent the key from being misused.
[0060]
Also, when unauthorized unlocking is attempted using an abnormal key, when pressure is applied to the cylinder in the direction of picking, or when unlocking is attempted using a construction key after using a normal key In this case, the inner ring also rotates together with the rotation of the cylinder, whereby the connection between the cylinder and the lock joint is disengaged and the cylinder rotates idly, so that unauthorized unlocking can be effectively prevented.
[0061]
In the above-described embodiment, the cylinder 6 using the plate-shaped tumbler 7 has been described. However, in the cylinder lock of the present invention, the plate-shaped tumbler 7 is not necessarily used. For example, a pin-shaped tumbler is used to connect the cylinder and the inner ring. Can be engaged.
[0062]
Even when a plate tumbler is used, the plate tumbler having the above-described configuration is not necessarily used. For example, FIG. 15 is a figure for demonstrating the other form of a plate tumbler, and 13 is a tumbler in the figure. In the tumbler 13 shown in FIG. 15, the position of the window portion 701 is made the same for all the tumblers 13, while the protrusion portion 1301 having an arbitrary shape is formed at an arbitrary position on the inner periphery of the window portion 701. The portion 1301 is formed so that the formation position of the protruding portion 1301 in at least all the tumblers 13 is not completely the same place. All the tumblers 13 can be retracted into the cylinder body 601 by inserting the key plate 14 having the recesses 1401 corresponding to the positions of the protrusions 1301 into the key holes 603.
[0063]
That is, it is generally said that pin-shaped tumblers are difficult to retreat to the cylinder side compared to plate-shaped tumblers, and therefore it is said that the effect of preventing picking is higher than when plate-shaped tumblers are used. On the other hand, there is a problem that the manufacturing cost is higher than that of a plate-shaped tumbler. Therefore, in the tumbler 13 shown in FIG. 15, the protruding portion 1301 has the same function as the pin-shaped tumbler by forming the protruding portion 1301 at an arbitrary portion of the inner periphery of the window portion 701 of the plate-shaped tumbler 13. The tumbler 13 cannot be retracted into the cylinder body 601 unless the portion 1301 is pressed. Therefore, according to this, it is possible to expect the same picking prevention effect as when using a pin-shaped tumbler, and it can be manufactured at the same low cost as when using a plate-shaped tumbler. In addition, since the protruding portion 1301 is formed at an arbitrary position on the inner periphery of the window portion 701, the number, the forming position, the height, and the number of the protruding portions 1301 are compared with the conventional plate-shaped tumbler and pin-shaped tumbler. A large number of tumblers with different shapes and the like can be made. As a result, the number of combinations of tumblers used in the cylinder becomes almost infinite, and the picking effect is higher and illegal key duplication is difficult.
[0064]
FIG. 15 is characterized in that the position of the window portion 701 in the tumbler 13 is the same and the protruding portion 1301 is formed in the window portion 701, and the others are the same as in the above-described embodiment. The same parts are denoted by the same reference numerals and redundant description is omitted.
[0065]
【The invention's effect】
The cylinder lock of the present invention is implemented in the form described above, and has the following effects.
[0066]
In the cylinder lock of this embodiment, a key different from the normal key can be used as a construction key, and after the normal key is used, it cannot be unlocked using this construction key. Can be effectively prevented.
[0067]
Also, when unauthorized unlocking is attempted using an abnormal key, when pressure is applied to the cylinder in the direction of picking, or when unlocking is attempted using a construction key after using a normal key In this case, the inner ring also rotates together with the rotation of the cylinder, whereby the connection between the cylinder and the lock joint is disengaged and the cylinder rotates idly, so that unauthorized unlocking can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a structure along an axial direction in a normal state in an embodiment of a cylinder lock of the present invention.
FIG. 2 is a partial cross-sectional view showing a side structure along an axial direction in an initial state in an embodiment of a cylinder lock of the present invention.
FIG. 3 is a partial cross-sectional view showing the structure along the axial direction when an abnormal key is used in an embodiment of the cylinder lock of the present invention.
FIG. 4 is a view showing an outer case used in an embodiment of the cylinder lock of the present invention.
FIG. 5 is a perspective view of an inner ring used in an embodiment of a cylinder lock of the present invention.
FIG. 6 is a cross-sectional view showing the structure along the axial direction of the inner ring used in the embodiment of the cylinder lock of the present invention.
FIG. 7 is an exploded view for explaining an inner ring used in the embodiment of the cylinder lock of the present invention.
FIG. 8 is a view for explaining the inside of the distal end portion of the inner inner ring in the inner ring used in the embodiment of the cylinder lock of the present invention.
FIG. 9 is a perspective view showing a cylinder used in an embodiment of the cylinder lock of the present invention.
FIG. 10 is an exploded view of a cylinder used in an embodiment of the cylinder lock of the present invention.
FIG. 11 is a view for explaining the relationship between a tumbler and a tumbler insertion hole in a cylinder used in an embodiment of the cylinder lock of the present invention.
FIG. 12 is a perspective view of a rotary plate used in an embodiment of the cylinder lock of the present invention.
FIG. 13 is a partially exploded view for explaining the relationship between a rotary plate, a lock joint, a spring, and a cover plate used in the embodiment of the cylinder lock of the present invention.
FIG. 14 is a cross-sectional view for explaining the relationship among a rotary plate, a lock joint, a spring, and a cover plate used in an embodiment of the cylinder lock of the present invention.
FIG. 15 is a view for explaining another form of the tumbler used in the cylinder lock of the present invention.
FIG. 16 is a view for explaining a conventional cylinder lock.
FIG. 17 is a view for explaining a conventional cylinder lock.
FIG. 18 is a view for explaining a conventional cylinder lock.
[Explanation of symbols]
1 cylinder lock
2 Outer case
201 Screw part
202 engaging groove
203 Screw hole
3 Inner ring
4 Outer inner ring
401 engaging part
402 engagement groove
403 chevron
404 engagement hole
5 Inner inner ring
501 engaging groove
502 chevron
503 engagement hole
504 Sphere
505 Spring
506 Inner ring tip
507 Through hole
508 Convex
509 recess
6 cylinders
601 cylinder body
602 Joint part
603 keyhole
604 Locking part
605 guide groove
606 Tumbler insertion hole
607 Projection
7 Tumbler
701 Window
702 Stepped portion
703 Convex
704 Spring
8 Rotary plate
801 Through hole
802 Notch
803 Convex
9 Lock joint
901 Jaw
902 Joint part
903 connecting part
10 Spring
11 Cover plate
13 Tumbler
1301 Protrusion

Claims (4)

An outer case (2),
An inner ring (3) rotatably provided in the outer case (2);
A cylinder (6) which is rotatably provided in the inner ring (3) and which has a joint portion (602) at a substantially central portion of the tip portion;
A rotary plate (through which a through hole (801) is formed in a substantially central portion and a notch (802) is formed in an arbitrary portion of the peripheral portion, which is detachably attached to the tip surface of the inner ring (3). 8) and
A lock joint that is engaged with the rotary plate (8), and whose front end portion passes through the through hole (801) in the rotary plate (8) and is connected to the joint portion (602) of the cylinder (6). (9) and
An elastic member (10) for biasing the lock joint (9) toward the rotary plate (8),
By pressing the rotary plate (8) toward the lock joint (9) against the urging force of the elastic member (10), the lock joint (9) and the joint portion (602) of the cylinder (6) A cylinder lock that can be disconnected,
The inner ring (3) has a tumbler engaging groove (402) on the inner peripheral surface and a protrusion (403) that can be fitted into a notch (802) formed in the rotary plate (8) at the tip. The outer inner ring (4) provided, and the tumbler inserted into the outer inner ring (4) so as to be rotatable and movable in the front-rear direction. A tumbler engaging groove (501) continuous to the engaging groove (402) is provided, and a protrusion (502) that can be fitted into a notch (802) formed in the rotary plate (8) is provided at the tip portion. An inner inner ring (5) having a concavo-convex portion on the inner side surface thereof, and a tip portion of the inner inner ring (5) is substantially equal to a tip portion of the outer inner ring (4). In this case, the inner inner ring (5) is engaged with the outer inner ring (4) to prevent the inner inner ring (5) from rotating and moving in the front-rear direction with respect to the outer inner ring (4). Combining means (504),
The cylinder (6) intersects the protrusion (607) formed at an arbitrary position around the joint (602), the key hole (603) formed in the axial direction, and the key hole (603). And a plurality of tumbler insertion holes (606) formed in the tumbler insertion holes (606) and tumblers (7, 13) inserted in and removed from the respective tumbler insertion holes (606). A key plate is provided in the key hole (603). When not inserted, the tumblers (7, 13) project to the inner surface side of the inner ring (3) and engage with tumbler engaging grooves (402, 501) formed in the inner ring (3). When the key plate is inserted into the key hole (602), the tumbler (7, 13) is retracted from the inner surface of the inner ring (3) and becomes inner. Becomes rotatable relative to ring (3), lock cylinder, characterized in that. The tumbler (7) is a plate-shaped tumbler having a window portion (701), and the window portions (701) are arranged so that the lower end positions of the window portions (701) of all the tumblers (7) do not coincide with each other. 701) is formed, The cylinder lock of Claim 1 characterized by the above-mentioned. The tumbler (13) is a plate-shaped tumbler (13) in which a protrusion (1301) is formed at an arbitrary position on the inner periphery thereof, and the positions of the protrusions (1301) of all the tumblers (13) are the same. The cylinder lock according to claim 1, wherein the protrusion (1301) is formed so as not to occur. The cylinder lock according to claim 1, wherein the tumbler is a pin-shaped tumbler.

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