JP2000136656A - Cylinder lock and locking-releasing key used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder key and a key, in which the locking-releasing key is difficult to be duplicated and malfeasant release operation is incapable. SOLUTION: A plug 2 is inserted rotatably into a plug case 1, the two groups of a group, in which the pair of tumbler pins 5, which are moved forward and retreated at different angles to the wide surfaces of a locking-releasing lock 3 put into the plug and in which axial center lines are crossed on the rotational central axis of the plug, are arrayed by imparting urging force in the central direction so that the tumbler pins belonging to the different groups are arranged alternately in the rotational central axis direction, and the end sections of the tumbler pins are placed on the rotational boundary surface of the plug case 1 and the plug and the turn of the plug is permitted when the correct locking-releasing key is inserted into the plug. One tumbler row of the tumbler groups is disposed at a place, where the crossed axes angles of the tumbler pairs in the other tumbler groups are divided, and V-shaped projecting sections functioning as guide rails for the key in combination are formed to a key inserting hole 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder lock and an unlocking key used for the cylinder lock.

[0002]

2. Description of the Related Art Generally, forming a concave portion for forming a cord from a direction inclined at a predetermined angle with respect to the side surface of a locking / unlocking key is effective to make it difficult to duplicate the locking / unlocking key using a copying machine or the like. A cylinder lock using such a locking / unlocking key is disclosed in Japanese Utility Model Application Laid-Open No. 62-14956.
No. 1 is known. In this conventional example, a plug that is rotatably inserted into a plug case is configured by arranging two tumbler rows that advance and retreat toward a corner of a key insertion groove.

[0003]

However, in the above-mentioned prior art, since the tips of the tumbler pins individually protrude into the key insertion grooves when the key is not inserted, a wire or a rod-shaped tool is required. There is a disadvantage that the used unauthorized unlocking operation is relatively easy.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks, and provides a cylinder lock and a locking / unlocking key in which it is difficult to duplicate a locking / unlocking key and an unauthorized unlocking operation is impossible. Aim.

[0005]

According to the present invention, the above object is achieved by rotatably inserting a plug 2 into a plug case 1, wherein the plug 2 has a locking / unlocking key inserted into the plug 2. 2 of a tumbler group 6 in which a pair of tumbler pins 5 are arranged in the longitudinal direction of the plug 2 so as to advance and retreat at different angles with respect to the wide surface 4 of the plug 3 and intersect with the shaft center line 5a on the rotation center axis 2a of the plug 2. The groups are arranged by applying a biasing force from the plug case 1 side toward the center of the plug 2 to the tumbler pins 5 so that the tumbler pins 5 belonging to different groups are alternately arranged in the direction of the rotation center axis 2a. Lock key 3
A cylinder lock that allows the end of the tumbler pin 5 to be positioned at the rotation boundary surface 7 between the plug case 1 and the plug 2 when the tumbler pin 5 is inserted. Is arranged at a position where the intersection angle θ of the tumbler pairs 11 in the other tumbler group 6 is divided, and the key insertion groove 8 projects toward the narrow surface 9 of the locking / unlocking key 3. V that doubles as a guide rail for locking / unlocking key 3
This is achieved by providing a cylinder lock provided with a letter-shaped projection 10.

In the plug 2, tumbler pairs 11 belonging to different tumbler groups 6 are alternately arranged in the longitudinal direction of the plug 2. The tumbler pin 5 of each tumbler pair 11 is a shaft center line 5
a are arranged so as to intersect with each other on the rotation center axis 2a of the plug 2, and when the locking / unlocking key 3 is not inserted, as shown in FIG. Plug 2 assigned to 5
Due to the urging force toward the center, the tip protrudes to or near the rotation center axis 2a of the plug 2 and the key insertion groove 8
Protrude into. In the protruding state of the tumbler pin 5, the end of the tumbler pin 5 on the plug case 1 side does not coincide with the rotation boundary surface 7 between the plug 2 and the plug case 1, and the rotation of the plug 2 is prohibited.

As shown in FIG. 4, when the genuine locking / unlocking key 3 is inserted into the key insertion groove 8, each tumbler pin 19 is inserted into the key code forming recess 19 which opens in the direction in which the tumbler pin 5 projects into the key insertion groove 8. 5 is in contact with the other end, and the other end is located at the rotation boundary surface 7 between the plug 2 and the plug case 1, and the rotation of the plug 2 is allowed. The locking / unlocking key 3 used for such a cylinder lock has a key code forming concave portion 19 inclined at a predetermined angle with respect to the wide surface 4, and further, the projection 10 is fitted to the narrow surface 9. The presence of the guide groove makes it difficult to duplicate the locking / unlocking key 3 using the copying machine.

In addition to the V-shaped projecting portion 10 reducing the space for inserting a wire or a rod-shaped tool, the tumbler pair 11 on the front side projecting from a different direction to the tumbler pair 11 on the rear side. In order to block the access route of
The cylinder lock cannot be unlocked by operating the tumbler pins 5 by inserting the tool or the like into the key insertion groove 8.

According to a second aspect of the present invention, a plug 2 is rotatably inserted into a plug case 1. The plug 2 has a wide surface 4 of a locking / unlocking key 3 inserted into the plug 2. The tumbler pins 5 move forward and backward at different angles, and the shaft center line 5a intersects on the rotation center axis 2a of the plug 2 by applying a biasing force to each tumbler pin 5 from the plug case 1 side toward the center of the plug 2. The tumbler pins 5 are arranged in the longitudinal direction of the plug 2, and when the genuine locking / unlocking key 3 is inserted into the plug 2, the end of the tumbler pin 5 is positioned on the rotation boundary surface 7 between the plug case 1 and the plug 2 to rotate the plug 2. The at least one tumbler pair 11
Are held by the locking / unlocking key 3 and push the floating ball 13 movable in the thickness direction of the locking / unlocking key 3, and move in the moving direction of the floating ball 13 following the movement of the floating ball 13. This is a cylinder lock including a driven pin 14.

A tumbler pin 5 urged toward the center of the plug 2 is mounted on the plug 2. The tumbler pins 5 are arranged in the longitudinal direction of the plug 2 such that two shaft center lines 5a intersect on the rotation center axis 2a of the plug 2 as a pair.
Is configured.

When the genuine locking / unlocking key 3 is inserted into the key insertion groove 8, as described above, each tumbler pin 5 is inserted into the key code forming recess 19 which opens in the direction in which the tumbler pin 5 projects into the key insertion groove 8. Since the tip contacts, the tumbler pin 5 is pushed out toward the plug case 1, and the other end is located at the rotation boundary surface 7 between the plug 2 and the plug case 1, and the rotation of the plug 2 is allowed.

In the present invention, an arbitrary tumbler pair 11 in the tumbler group corresponds to the floating ball 13 held by the locking / unlocking key 3, and the driving pin 12 moves toward the center of the plug 2 to push out the floating ball 13. ,
The plug case 1 is moved by the movement of the floating ball 13.
And a driven pin 14 pushed to the side. The end of the drive pin 12 and the driven pin 14 on the plug case 1 side coincides with the rotation boundary surface 7 between the plug case 1 and the plug 2 to determine whether the rotation of the plug 2 is permitted or not. Since the floating ball 13 is movable with the locking / unlocking key 3 alone, the position of the floating ball 13 at the time of unlocking cannot be reproduced by a copying machine or the like, and cannot be duplicated.

According to a fourth aspect of the present invention, there is provided a locking / unlocking key 3 for locking / unlocking a cylinder lock in which a plug 2 having a plurality of tumbler pins 5 is rotatably inserted into a plug case 1, wherein the key insertion of the plug 2 is performed. Blade part 1 inserted into groove 8
5 has a bottomed ball receiving hole 16 formed in a direction perpendicular to the wide surface 4 of the blade portion 15 and a ball receiving hole 1.
6 is provided with a ball access hole 17 that is drilled obliquely from the side opposite to the open surface of the wide surface 4 and communicates with the ball receiving hole 16, and a spherical floating hole is provided in the ball receiving hole 16. The locking / unlocking key 3 in which the ball 13 is movably accommodated.

According to the present invention, the floating ball 1
Since the key 3 is mounted, not only is it difficult to duplicate the key, but also because the ball access holes 17 and the ball receiving holes 16 are not arranged in a straight line, there are the following advantages. FIG. 6 is an explanatory view showing a case where the ball access holes 17 and the ball receiving holes 16 are arranged in a straight line. The drive pins 12 and the drive pins 18 corresponding to the driven pins 14 are mounted on the plug case 1. As shown in FIG. 6 (a), when the locking / unlocking key 3 is inserted into the key insertion groove 8 of the plug 2, the ball receiving hole 16 faces the driven pin 14, and the ball access hole 17 is Since the compression spring for urging the drive pin 18 on the drive pin 12 side is stronger than the driven pin 14 side, the drive pin 12 urged by the drive pin 18 toward the center of rotation of the plug 2 has a ball access hole. 17 and pushes the floating ball 13 to the opposite side. Ball receiving hole 16
The urging force of the drive pin 18 corresponding to the driven pin 14 corresponds to the driving pin 12 in order to move the driven pin 14 entering the Drive pin 1
It is necessary to make it weaker than the biasing force of 8,
When the plug 2 is rotated by 180 °, the ball access hole 17 corresponds to the driven pin 14 and the ball receiving hole 16 corresponds to the drive pin 12, as shown in FIG. In this state,
The floating ball 13 is pushed by the driven pin 14 and cannot be stopped at a normal position, and the ends of the driving pin 12 and the driven pin 14 are displaced from the rotational boundary surface 7 between the plug 2 and the plug case 1 so that the plug 2 Can not be rotated.

On the other hand, in the present invention, the plug 2
When the is rotated by 180 ° or another angle, the drive pin 12 and the driven pin 14 do not face the drive pin 18 at positions other than the initial rotation position. Does not occur.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 4, a cylinder lock is formed by inserting a plug 2 into a plug case 1 in a freely rotatable manner. The plug 2 has a cylindrical shape, and a key insertion groove 8 extending in the direction of the center of rotation of the plug 2 is formed at the center thereof. The key insertion groove 8 has a substantially rectangular cross-section that matches the general cross-sectional shape of the blade portion 15 of the locking / unlocking key 3, which will be described later.
A letter-shaped protrusion 10 is provided. As shown in FIG. 3, the key insertion groove 8 is formed at a position where the center 8b is eccentric from the rotation center of the plug 2 by an offset amount δ.

A plurality of tumbler pins 5 are mounted on the plug 2. Each tumbler pin 5 has a large diameter portion 5b and a small diameter portion 5b.
The stepped pin is a stepped pin having a circular cross section and having a truncated cone-shaped sensing portion 5d at the tip of the small diameter portion 5c. The tumbler pins 5 are movably accommodated in a tumbler insertion hole 20 formed in the plug 2 so that the sensing portion 5d faces the key insertion groove 8 so that the shaft center line 5a passes through the rotation center of the plug 2. Be placed. The tumbler insertion hole 20 is a stepped hole corresponding to the large diameter portion 5b and the small diameter portion 5c of the tumbler pin 5, and the tumbler pin 5 has a step formed at the boundary between the large diameter portion 5b and the small diameter portion 5c. Tumbler insertion hole 2
By contacting the step portion on the 0 side, the amount of protrusion into the key insertion groove 8 is regulated.

The tumbler pins 5 are arranged in the plug 2 according to the following rules. First, two tumbler pins 5, 5 are arranged in an arbitrary plane orthogonal to the rotation center of the plug 2. Since these two tumbler pins 5 have the shaft center line 5a passing through the rotation center axis 2a of the plug 2 and belonging to the same plane as described above, the shaft center line 5a is located on the rotation center axis 2a of the plug 2. An intersecting relationship is established, and the tumbler group 6 is formed by arranging the pairs 11 of the two tumbler pins 5 at a pitch p in the direction of the rotation center axis 2a of the plug 2, that is, in the longitudinal direction of the plug 2 at a predetermined pitch. In this embodiment, the tumbler pair 11 has an axial center line 5a.
Is formed of a pair of tumbler pins 5 having an intersection angle θ of 135 °, one of the tumbler pins 5 advances and retreats orthogonally from one of the locking / unlocking key wide surface corresponding surfaces 8 c of the key insertion groove 8, and the other tumbler pin 5 The locking / unlocking key 3 advances / retreats with respect to the other wide surface 8c 'of the key insertion groove 8 from the side of the narrow surface 8a of the locking / unlocking key 3 near the center of the plug 2 at a 45 ° inclination angle.

The cylinder lock according to the present invention is constructed by arranging a plurality of the tumbler groups 6 on the plug 2. In this embodiment, the plug 2 has two tumbler groups 6 having the same crossing angle θ in the tumbler pair 11 and the same pitch p between the tumbler pairs 11. Tumbler group 6
Of tumbler pins 5 are arranged at positions dividing the intersection angle θ of the other tumbler group 6. As shown in FIG. 2, these two groups of tumbler groups 6 are arranged with a half pitch shift in the longitudinal direction of the plug 2, so that a different tumbler group differs every half pitch in the longitudinal direction of the plug 2. The tumbler pairs 11 belonging to 6 are arranged. In order to show the relationship between the tumbler groups 6, in FIG.
3B, the surface formed by the axis center line 5a of the tumbler pins 5 belonging to one tumbler group 6 is denoted by reference numeral 6A ', and the other tumbler is shown in FIG. Tumbler pins 5 belonging to group 6
The surface formed by the axis center line 5a is denoted by reference numeral 6B '.

On the other hand, the plug case 1 has the plug 2
Drive pin insertion holes 1a communicating with the respective tumbler insertion holes 20 are formed. The drive pin insertion hole 1a and the tumbler insertion hole 20 are arranged in a straight line facing each other, and the drive pin 18 is inserted into the drive pin insertion hole 1a. The drive pin 18 is a large diameter portion 5 of the tumbler pin 5.
It is a cylindrical body having substantially the same diameter as b, and is urged toward the center of the plug 2 by the compression spring 21.

Under the above configuration, when the locking / unlocking key 3 described later is not inserted into the key insertion groove 8, the tumbler pin 5 in the plug 2 is pushed by the drive pin 18 and protrudes into the key insertion groove 8. As shown in FIG. 3, in the protruding state, the tips of the sensing portions 5 d are mutually connected to the rotation center axis 2 a
The dimensions of the step are determined appropriately so as to make contact above. When the tumbler pin 5 projects into the key insertion groove 8, the tip of the drive pin 18 enters the plug 2 beyond the rotational boundary 7 between the plug 2 and the plug case 1. It is closed and the plug 2 cannot be rotated. From this state, the tumbler pin 5 on the near side closes the access path to the tumbler pin 5 on the rear side even if the tumbler pin 5 is operated by using a rod-shaped or wire-shaped tool to illegally unlock the cylinder lock. Therefore, the unlocking operation becomes very difficult.
In addition, since the V-shaped protrusion 10 is provided on the narrow surface corresponding surface 8a of the locking / unlocking key 3 near the center of the plug 2,
It is impossible to insert a tool from this area, and further, from the opposite area, that is, the narrow surface corresponding surface 8a 'near the periphery of the plug 2, the tumbler pair 11 of one tumbler group 6
Since the tumbler pin 5 located at the position where the intersection angle θ is divided cannot be accessed, unauthorized unlocking using a jig cannot be performed.

FIG. 1B shows an unlocking key 3 used for the cylinder lock. The locking / unlocking key 3 has a blade portion 15 having a grip portion 3a at the tip. The blade portion 15 is a flat plate-shaped key having a rectangular cross-sectional shape. The narrow surface 9 has a V-shaped guide groove 15 into which the protrusion 10 of the plug 2 can be fitted.
a is formed. As shown in FIGS.
5, a plurality of key code forming recesses 19 are provided by dimple processing so that each key code forming recess 19 faces the end face of the sensing portion 5 d of the tumbler pin 5 when inserted into the key insertion groove 8 of the plug 2. , Each tumbler pin 5 has an axial center coinciding with the axial center line 5a. Forming the guide groove 15a on the narrow surface 9 of the blade is difficult with a normal-precision copying machine, and in addition, a key code forming recess formed in an oblique direction with respect to the wide surface 4 of the blade portion 15. Since it is generally difficult to accurately copy 19 with a copying machine, it is difficult to duplicate the lock / unlock key 3.

When the blade portion 15 of the locking / unlocking key 3 configured as described above is inserted into the key insertion groove 8 of the plug 2,
The tumbler pins 5 are fitted into the respective key code forming recesses 19, and the tumbler pins 5 move toward the plug case 1 from the initial position to a position corresponding to the depth of the key code forming recesses 19. When the depth of the key code forming recess 19 matches the type of the corresponding tumbler pin 5, that is, when the inserted locking / unlocking key 3 is genuine, as shown in FIG. The tip of the diameter portion 5b is located at the rotation boundary surface 7 between the plug 2 and the plug case 1, and the rotation of the plug 2 is allowed. On the other hand, if the depth of the key code forming recess 19 is too deep, the drive pin 18
If the key code forming recess 19 is too shallow,
The tumbler pin 5 closes the rotation boundary surface 7 and inhibits rotation of the plug 2.

In this embodiment, the key code forming recess 19 is provided at the intersection of the center line in the width direction and the center line in the thickness direction of the blade portion 15 so that the blade portion 15 can be used even when the blade portion 15 is turned upside down. On the other hand, two pieces having the same shape are formed at point symmetric positions.

Further, as shown in FIG. 5, the blade portion 15 is provided with a ball receiving hole 16 and a ball access hole 17 corresponding to one of the tumbler pairs 11, and a spherical floating ball is provided in the ball receiving hole 16. 13 is movably accommodated. The ball receiving hole 16 is provided in the blade portion 15.
Is a circular hole opened in a direction orthogonal to the wide surface 4 of the first embodiment, has a bottom wall 16a formed of a cone, and prevents the floating ball 13 from falling off by caulking the opening end. The floating ball 13 can be used in a state similar to the above-described key code forming recess 19 so that the floating ball 13 can be used even when the blade portion 15 is turned upside down. Two are arranged at symmetrical positions.

On the other hand, the plug 2 has
The driven pin 14 faces the ball access hole 17, and the driven pin 12 faces the ball access hole 17. These driven pins 14
The drive pin 12 is a stepped pin having large diameter portions 14a, 12a and small diameter portions 14b, 12b like the tumbler pin 5 described above.
Through the plug 2 toward the center of the plug 2. The spring force of the compression spring 21 for urging the drive pin 18 toward the center of the plug 2 is determined by the force of the drive pin 12 pushing up the floating ball 13 toward the driven pin 14.
The driving pin 1 is set to be larger than the pushing force of the driven pin 14 for pushing down the floating ball 13.
When the ball 2 faces the ball access hole 17 and the driven pin 14 faces the ball receiving hole 16, the floating ball 13 is always held at a position floating from the bottom wall 16 a of the ball receiving hole 16. In this state, the floating amount of the floating ball 13 can be managed by either the locking / unlocking key 3 or the drive pin 12.
The control of the floating amount of the floating ball 13 on the side is provided by providing a reference portion for restricting the floating amount of the floating ball 13 at the opening end of the ball receiving hole 16. It is performed so that it floats until it comes into contact with the reference portion. Further, the management on the drive pin 12 side is performed by the drive pin 1
2 is controlled by the step of the tumbler insertion hole 20.

Therefore, in this embodiment, when the locking / unlocking key 3 is not inserted, the driving pin 1
2 and the driven pin 14 are urged toward the center of the plug 2 by the drive pin 18 so that the drive pin 18 is
The rotation of the plug 2 is prohibited in order to close the rotation boundary surface 7 between the plug 2 and the plug case 1. As shown in FIG. 5, when the locking / unlocking key 3 is inserted, the driving pin 12 enters the ball accommodating hole 16 from the ball access hole 17 and pushes up the floating ball 13 by a predetermined amount. In this state, the end of the driven pin 14 and the drive pin 12 on the plug case 1 side coincides with the outer peripheral surface of the plug 2, and the rotation boundary surface 7 between the plug 2 and the plug case 1 is opened to allow the rotation of the plug 2. I do.

As described above, the locking / unlocking key 3 provided with the floating ball 13 moving in the ball receiving hole 16 is extremely difficult to copy by the copying machine, and
As shown in this embodiment, if the floating ball 13 is set to protrude from the general surface (the wide surface 4 in this embodiment) of the blade portion 15 in the unlocked state, the copying is performed by imitating the unlocked state. Since the locking / unlocking key 3 copied by the processing machine cannot be inserted from the key insertion groove 8, the copying by the copying machine becomes impossible.

[0029]

As is apparent from the above description, according to the present invention, it is possible to make the duplication of the locking / unlocking key and the unauthorized unlocking operation impossible.

[Brief description of the drawings]

1A and 1B are views showing the present invention, wherein FIG. 1A is a perspective view of a cylinder lock showing an arrangement of tumbler pins, and FIG. 1B is a perspective view of an unlock key.

FIG. 2 is a sectional view of a cylinder lock.

FIG. 3 is a sectional view taken along line 3A-3A in FIG. 2;

FIG. 4 is a cross-sectional view corresponding to FIG. 3, showing a state in which a genuine locking / unlocking key is inserted.

FIG. 5 is a sectional view taken along line 5A-5A of FIG. 2;

FIGS. 6A and 6B are explanatory diagrams showing a state in which a ball accommodation hole and a ball access hole are arranged in a straight line. FIG. 6A is a diagram showing an unlocked state, and FIG. 6B is a diagram showing a state rotated by 180 °.

[Explanation of symbols]

 Reference Signs List 1 plug case 2 plug 2a rotation center axis 3 locking / unlocking key 4 wide surface 5 tumbler pin 5a axis center line 6 tumbler group 7 rotation boundary surface 8 key insertion groove 9 narrow surface 10 protrusion 11 tumbler pair 12 drive pin 13 floating ball 14 Follower pin 15 Blade part 16 Ball receiving hole 17 Ball access hole θ Crossing angle

Claims (4)

[Claims] 1. A plug, wherein a plug is rotatably inserted into a plug case. The plug advances and retreats at different angles with respect to a wide surface of a locking / unlocking key inserted into the plug, and has a shaft center. A pair of tumbler pins in which the lines intersect on the rotation center axis of the plug are arranged in the longitudinal direction of the plug. Two groups of tumbler groups are arranged on each tumbler pin so that tumbler pins belonging to different groups in the longitudinal direction of the plug are alternately arranged. The plug is rotated by applying a biasing force toward the center of the plug, and when the genuine locking / unlocking key is inserted into the plug, the end of the tumbler pin is positioned at the boundary between the plug case and the plug to allow rotation of the plug. A tumbler row in one of the tumbler groups,
It is arranged at the position where the intersection angle of the tumbler pair in the other tumbler group is divided, and the key insertion groove projects toward the narrow side of the locking / unlocking key,
A cylinder lock provided with a V-shaped projection that also serves as a guide rail for an unlocking key. 2. A plug case, wherein a plug is rotatably inserted into a plug case. The plug advances and retreats at different angles with respect to a wide surface of a locking / unlocking key inserted into the plug, and has a shaft center. A pair of tumbler pins whose lines intersect on the center axis of rotation of the plug are arranged in the longitudinal direction of the plug by applying a biasing force from the plug case side to the plug center side to each tumbler pin, and a genuine locking / unlocking key is inserted into the plug. A cylinder lock that permits rotation of the plug by positioning an end of the tumbler pin at a rotation boundary surface between the plug case and the plug, wherein the at least one tumbler pair is held by a locking / unlocking key; A drive pin that pushes out a floating ball that can move in the thickness direction of the key, and a driven pin that moves in the direction of movement of the floating ball following the movement of the floating ball. Cylinder lock made. 3. The cylinder lock according to claim 1, wherein at least one tumbler row of one of the tumbler groups comprises the drive pin and the driven pin according to claim 2. 4. A locking / unlocking key for locking / unlocking a cylinder lock in which a plug having a plurality of tumbler pins is rotatably inserted into a plug case, wherein a blade portion inserted into a key insertion groove of the plug has a blade. A bottomed ball receiving hole opened in a direction orthogonal to the wide surface of the portion, and a hole that is drilled obliquely to the wide surface from the side opposite to the open surface of the ball receiving hole and communicates with the ball receiving hole. A locking / unlocking key in which a ball access hole is provided and a spherical floating ball is movably accommodated in the ball accommodation hole.