JP4128375B2 - Locking and unlocking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a locking / unlocking device including a cylinder lock and a key for performing a locking / unlocking operation on the cylinder lock.
[0002]
[Prior art]
In recent years, a crime called picking, in which unauthorized unlocking is performed by operating a tumbler in a keyhole by using a special tool, has frequently occurred. In view of this, in order to prevent such unauthorized unlocking, measures are being taken to prevent unauthorized unlocking by making it difficult to pick the cylinder lock portion of the locking / unlocking device.
[0003]
As this type of cylinder lock, as shown in FIGS. 8 and 9, for example, there is one using a mortar-shaped recess, that is, a so-called dimple 71 provided with a key 73 provided at a predetermined position on the front and back surfaces. The cylinder lock moves the tumbler pin in accordance with the dimple 71 of the fitting key 73 inserted into the key hole, and aligns the shear line of the tumbler pin with the boundary portion with the outer cylinder that is externally inserted into the inner cylinder. Unlock the outer cylinder by releasing the rotation restriction.
[0004]
As shown in FIG. 11, the cylinder lock 75 rotates the inner cylinder 83 because the tumbler pin 77 is pushed by the spring 79 and the outer cylinder 81 and the inner cylinder 83 are penetrated with the key 73 removed. I can't let you. On the other hand, as shown in FIG. 10, when the fitting key 73 is inserted into the key hole 76, the tumbler pin 77 at a predetermined position is retracted, and the shear line 85 of the tumbler pin 77 is formed at the boundary portion 87 between the outer cylinder 81 and the inner cylinder 83. The inner cylinder 83 can be rotated.
[0005]
[Problems to be solved by the invention]
However, the above-described dimple-type cylinder lock has a tumbler pin at a predetermined position retracted according to the dimple of the key inserted in the key hole, and the shear line of the tumbler pin is made to coincide with the boundary between the outer cylinder and the inner cylinder. In the point of canceling the rotation restriction of the inner cylinder, the pin cylinder mechanism having a structure in which a valley is formed on the side edge of the conventional key is followed.
[0006]
In the above cylinder lock, the tumbler pins are brought into contact with each other in the direction perpendicular to the dimple formation surface of the key, so that it is difficult to secure a large distance in the direction in which the tumbler pins come into contact, and it is difficult to increase the difference in keys. It becomes. That is, the distance in the direction in which the tumbler pin comes into contact depends on the thickness of the key. On the other hand, if the thickness of the key is increased, the key hole becomes larger, which makes unauthorized unlocking easier.
[0007]
Moreover, in the cylinder lock of the above structure, it is a configuration using a joint key formed in a substantially plate shape, and since the shape of the key hole is formed in a substantially slit shape, both end portions of the slit are used, etc. It has a structure that allows unauthorized unlocking operations such as rotating operations on cylinder locks, and it is desirable to deal with unauthorized operations such as picking with respect to the shape of the key and the shape of the key hole. ing.
[0008]
The present invention has been made in view of the above circumstances, and provides a locking / unlocking device having a structure of a key and a cylinder lock that can improve resistance to illegal unlocking such as picking. Another object of the present invention is to obtain a locking / unlocking device in which unlocking is impossible when an unlocking operation such as an unauthorized unlocking operation is performed without using a key, and crime prevention is improved.
[0009]
[Means for Solving the Problems]
Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The locking / unlocking device 1 according to claim 1 of the present invention includes an outer cylinder 7 and an inner cylinder 11 that is rotatable with respect to the outer cylinder 7, and the tumbler pin extends between the outer cylinder 7 and the inner cylinder 11. The tumbler pin 17 is moved from the key hole 14 to a predetermined position in the radial direction by inserting the key 51 into the key hole 13 formed in the inner cylinder 11 in the cylinder lock 3 through which the numeral 17 is disposed. The locking / unlocking device 1 releases the rotation restriction of the inner cylinder 7 by matching the shear line 25 of the tumbler pin 17 with the boundary portion 27 between the outer cylinder 7 and the inner cylinder 11,
An inner cylinder 11 having a keyhole 13 formed in a circular hole shape;
The insertion portion 55 to be inserted into the keyhole 13 is formed in a cylindrical shape having a circular cross section, and a plurality of recesses 59 whose depths are combined corresponding to the tumbler pins 17 are formed on the outer peripheral surface of the insertion portion 55. The key 51
An engaging convex portion 33 which is disposed at a predetermined position in the key hole 13 of the inner cylinder 11 and protrudes inwardly of the key hole 13;
An engagement recess 61 formed on the outer peripheral surface of the joint key 51 and engaged with the engagement protrusion 33;
And having
An insertion hole 29 is formed in the inner cylinder 11 in the radial direction, and a sliding piece 31 whose tip is the engagement convex portion 33 is provided in the insertion hole 29 so as to be slidable in the radial direction of the inner cylinder 11. And
A space portion 35 is formed on the inner peripheral surface of the outer cylinder 7 corresponding to the insertion hole 29, and contacts the proximal end of the sliding piece 31 in the space portion 35, and the engagement convex portion 33. Is provided in the keyhole 13 in a protruding state, and a support piece 37 that is crushed without being restored to its original shape by a pressing force is provided,
At the time of operation by the joint key 51, the shear line 25 is matched, and the engagement convex part 33 and the engagement concave part 61 are fitted, so that the shape inside the key hole 13 and the shape of the joint key insertion part 55 are fitted. And the rotation operation of the key 51 is transmitted to the inner cylinder 11,
When an object having a shape that does not properly fit in the keyhole 13 is inserted, the engagement convex portion 33 is pressed, and the support piece 37 is crushed by the sliding of the slide piece 31, and the inner cylinder The sliding piece 31 is positioned at a boundary portion 27 between the outer cylinder 7 and the outer cylinder 7 to make the inner cylinder 11 unrotatable.
[0010]
According to the locking / unlocking device 1, the shape of the insertion portion 55 of the key 51 is a circular column with a circular cross section, and the shape of the key hole 13 is a circular hole. Even if an attempt is made to lock a tool or the like in the key hole 13 to perform the operation, it is impossible to perform an operation of rotating the inner cylinder 11 because it is not a hooked shape, thereby obtaining crime prevention.
Further, according to this locking / unlocking device 1, when the engaging convex portion 33 is pressed when a tool or the like is inserted into the key hole 13 to perform an unauthorized unlocking operation, along the insertion hole 29. Thus, the sliding piece 31 moves backward to the space portion 35 of the outer cylinder 7, and the support piece 37 supporting the sliding piece 31 is crushed in the space portion 35 without being restored to the original shape. As a result, the sliding piece 31 is positioned at the boundary portion 27 between the outer cylinder 7 and the inner cylinder 11, and the inner cylinder 11 cannot be rotated with respect to the outer cylinder 7, that is, unauthorized unlocking. Disable operation.
The support piece 37 is formed of a thin circular pipe, so that when the 31 sliding piece moves backward, it is easily crushed and shifts to an unlockable state with respect to an unauthorized unlocking operation. It is possible to perform reliably.
[0011]
The locking / unlocking device according to claim 2, wherein the insertion portion 55 of the key 51 has an outer diameter that is different from each other through a step portion in the axial direction, is formed in multiple steps, includes a small diameter portion 57, and has a conical tip. It is formed in the shape.
[0012]
According to this locking / unlocking device 1, the shape of the key 51 is not limited to the recesses (dimples) 59, but the narrow diameter portions 57 formed in multiple stages are formed, and the combination of the narrow diameter portions 57 and the recesses 59 It is possible to configure key differences.
[0013]
The locking / unlocking device according to claim 3, wherein the engagement convex portion 33 is formed in a long ridge shape parallel to the axial direction of the inner cylinder 11, and the engagement concave portion 61 includes the insertion portion. It is characterized by being formed in a long groove that is parallel to the axial direction of 55.
[0014]
According to this locking / unlocking device, the engagement state of the engagement convex portion 33 and the engagement concave portion 61 is elongated in the axial direction, and the rotation operation of the joint key 51 on the engagement concave portion 61 side is reliably engaged. It can transmit to the inner cylinder 11 which is the joint convex part 33 side, and the operation of locking / unlocking the inner cylinder 11 by the joint key 51 can be performed.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
1 is a side sectional view showing an embodiment of the locking / unlocking device according to the present invention, FIG. 2 is a side sectional view of a cylinder lock of the locking / unlocking device, and FIG. 3 is a front view of the cylinder lock of the locking / unlocking device.
[0020]
As shown in FIG. 1, the cylinder lock 3 which comprises the locking / unlocking apparatus 1 of this invention mounts the outer cylinder 7 inside the exterior cylinder 5 so that relative rotation is impossible. The outer cylinder 5 has a base end 5a fixed to a lock box on the side of the lock mechanism main body (not shown), a front end side half portion 5b protruding from the door surface, and an outer periphery covered with a decorative ring 9 or the like.
Inside the outer cylinder 7, an inner cylinder 11 having a key hole 13 is rotatably provided. The outer cylinder 7 and the inner cylinder 11 are provided with through holes 15 in the radial direction across both. One end of the through hole 15 opens to the key hole 13, and the other end opens to the outer peripheral surface of the outer cylinder 7.
[0021]
A plurality of through-holes 15 are disposed along the axial direction of the key hole 13 and are also disposed at left and right positions inclined about 45 ° with respect to the axis of the key hole 13 as shown in FIG. In this embodiment, a plurality of through holes 15 are provided in three directions with respect to the axial direction of the key hole 13.
[0022]
Further, the through hole 15 has a small diameter hole at the front end side that opens into the key hole 13, and a large diameter hole at the rear end side that opens to the outer peripheral surface of the outer cylinder 7. The boundary between the small diameter hole and the large diameter hole is a step portion 16 in the inner cylinder 11.
[0023]
A tumbler pin 17 is provided in each through hole 15.
The tumbler pin 17 is attached to the through hole 15 in advance before attaching the outer cylinder 7 to the outer cylinder 5. The tumbler pin 17 includes a stepped pin 18 on the front end side and a driver pin 19 on the rear end side. The stepped pin 18 has a flange-shaped corner portion 18a on the rear end side, and the tip end side is formed in a conical shape. The driver pin 19 has a recess 19 a on the rear end side, and is coaxial with the stepped pin 18 and contacts the rear end surface of the stepped pin 18.
[0024]
The tumbler pin 17 has a corner 18a of the stepped pin 18 that abuts the step 16 of the through hole 15 so that the tip of the stepped pin 18 protrudes into the keyhole 13 with a predetermined size. The protrusion is stopped (see FIG. 2).
A curved thin plate-like lid member 21 is attached to the outer peripheral surface of the outer cylinder 7, and the opening of the through hole 15 located on the outer peripheral surface of the outer cylinder 7 is closed.
[0025]
A compressed spring 23 is disposed between the lid member 21 and the recess 19 a of the driver pin 19. Therefore, the tumbler pin 17 is in a state where the tip is protruded into the key hole 13 at normal time (when the joint key is not inserted (see FIG. 2)), and the tip is pressed against the urging force of the spring 23. Then, it is retracted into the through hole 15. The tumbler pin 17 is divided into a stepped pin 18 and a driver pin 19, and the boundary is a so-called shear line 25. The shear line 25 is set at a different position from the tip of each tumbler pin 17. That is, in the inner cylinder 11, the rotation restriction is not released unless all the shear lines 25 of the tumbler pins 17 coincide with the boundary portion 27 with the outer cylinder 7.
[0026]
In addition, a pair of insertion holes 29 facing each other and penetrating in the radial direction are formed in the inner position of the key hole 13 of the inner cylinder 11.
Each insertion hole 29 is a long hole that is long in the axial direction of the inner cylinder 11, and a sliding piece 31 that is disposed so as to face each other about the axis of the inner cylinder 11 is fitted. The sliding piece 31 is formed in a substantially rectangular plate shape and is slidable in the radial direction of the inner cylinder 11 in the insertion hole 29. The length of the sliding piece 31 is slightly longer than the thickness of the inner cylinder 11. Further, the tip of the sliding piece 31 is formed from a curved surface and has a substantially semi-cylindrical shape as an engaging convex portion 33. In a state where the sliding piece 31 is fitted and attached to the inner cylinder 11, the engaging convex portion 33 at the tip protrudes in a protruding shape in the keyhole 13. Further, the base end of the sliding piece 31 is substantially flush with the outer peripheral surface of the inner cylinder 11.
[0027]
Corresponding to each insertion hole 29 of the inner cylinder 11, a space portion 35 is formed at the opposite position on the inner peripheral surface of the outer cylinder 7. The space 35 is formed in a substantially concave groove shape along the axial direction of the outer cylinder 7.
A support piece 37 is fitted into the concave groove-shaped space 35. This support piece 37 is made of a material that can be crushed, preferably a material that is deformed by an external force and does not restore to its original shape, that is, a plastic material. In the present embodiment, the support piece 37 is composed of a circular pipe, preferably It consists of a thin pipe. The support piece 37 is located in the space 35, does not protrude from the inner peripheral surface of the outer cylinder 7, and abuts on the base end of the sliding piece 31 of the inner cylinder 11.
[0028]
Further, at the boundary portion between the inner cylinder 11 and the outer cylinder 7, the rotation of the inner cylinder 11 with respect to the outer cylinder 7 is temporarily performed at a position facing the position where the tumbler pin 17 is disposed (lower part in the figure). An engaging portion 39 is provided for holding the inner cylinder 11 and obtaining a click feeling when the inner cylinder 11 is rotated with respect to the outer cylinder 7. The locking portion 39 includes a substantially hook-shaped locking member 41 and a biasing member 43 such as a spring for biasing the locking member 41 from the inner peripheral surface of the outer cylinder 7 to the outer peripheral surface of the inner cylinder 11. A groove 45 along the axial direction is formed on the outer peripheral surface of the inner cylinder 11, and a locking member 41 is applied to the groove 45, and the rotation of the inner cylinder 11 with respect to the outer cylinder 7 is temporarily stopped.
[0029]
A connecting dharma 47 that is interlocked and connected to a lock mechanism (not shown) is connected to the inner end of the inner cylinder 11. The connecting dharma 47 is rotatably supported at the back end of the outer cylinder 7.
[0030]
Next, the key 51 used for the locking / unlocking device 1 will be described.
As shown in FIG. 5, the joint key 51 includes a knob portion 53 and an insertion portion 55.
The knob portion 53 is formed in a substantially rectangular plate shape. The insertion portion 55 is formed in a columnar shape having a continuous circular cross section. As shown in FIG. 5, the insertion portion 55 of the present embodiment has a small diameter in the middle, that is, the outer diameter is different via the step portion, is formed in multiple stages, and includes the small diameter portion 57. The tip is formed in a conical shape.
[0031]
On the outer peripheral surface of the insertion portion 55, a so-called dimple 59, a so-called dimple 59, in which the tumbler pin 17 is retracted into the through hole 15 and arranged at a predetermined position in the axial direction, is formed. As described above, the dimple 59 has such a depth that the positions of the different shear lines 25 coincide with the boundary portion 27.
The dimple 59 is combined with the outer diameter of the insertion portion 55, that is, a key difference is realized by the diameter of the narrow diameter portion 57 in the insertion portion 55 and the depth of the dimple 59.
[0032]
Moreover, as shown in FIG. 6, the engagement recessed part 61 is provided in the both sides | surfaces located in the radial direction outer side in the front-end | tip part of the insertion part 55 of this joint key 51. As shown in FIG. The engaging recess 61 is formed of a substantially U-shaped groove that is elongated along the axial direction of the insertion portion 55. In the present embodiment, these engaging recesses 61 are arranged in a direction orthogonal to the plate surface of the knob portion 53. And it is comprised so that it may mutually fit with the above-mentioned engagement convex part 33 in the key hole 13 of the inner cylinder 11, ie, the external shape of the engagement convex part 33 and the groove shape of the engagement recessed part 61 are set to substantially the same shape. The
[0033]
Next, operation | movement of the locking / unlocking apparatus 1 comprised in this way is demonstrated.
As shown in FIGS. 2 and 3, when the joint key 51 is not inserted, each tumbler pin 17 is urged by the spring 23 to project the tip into the key hole 13. Further, the shear lines 25 of the respective tumbler pins 17 are discontinuous, and as a result, the driver pins 19 are arranged at the boundary portions 27 between the outer cylinder 7 and the inner cylinder 11. For this reason, the inner cylinder 11 is restricted from rotating with respect to the outer cylinder 7.
[0034]
When the proper lock 51 shown in FIG. 5 is inserted into the cylinder lock 3, the engagement recess 61 at the tip of the lock 51 engages with the engagement protrusion 33 in the lock hole 13. At the same time, each tumbler pin 17 falls into a predetermined dimple 59 provided in the joint key 61, or the tumbler pin 17 abuts on the outer peripheral surface such as the small diameter portion 57 of the insertion portion 55, and the through hole 15 Move to a predetermined position in the axial direction. As a result, the shear line 25 of each tumbler pin 17 continues in a straight line as shown in FIG. 1 and coincides with the boundary portion 27 between the outer cylinder 7 and the inner cylinder 11. That is, the inner cylinder 11 is in a state in which the rotation restriction is released.
[0035]
Then, when the joint key 51 is rotated, the engagement concave portion 61 and the engagement convex portion 33 are engaged with each other in the circumferential direction in the axial direction, and an operation force in the rotation direction is transmitted, and the sliding piece 31 is transmitted. While being separated from each other at the boundary between the base end and the support piece 37, the tumbler pin 17 is separated from the shear line 25, and the inner cylinder 11 rotates with respect to the outer cylinder 7, that is, unlocks.
[0036]
It should be noted that the insertion portion 55 and the key hole 13 of the joint key 51 have a fitting state in which the outer diameter of the joint key 51 and the inner diameter of the key hole 13 are in the leading end portion, and the engagement concave portion 61 and the engagement convex portion. 33 is in a fitted state, the shape inside the key hole 13 and the shape of the fitting key insertion portion 55 are matched, and the rotation operation of the fitting key 51 is transmitted to the inner cylinder 11, and the inner cylinder 11 can be rotated.
[0037]
Here, for example, when a tool such as a screwdriver is used for the inner cylinder 11 of the cylinder lock 3 in order to illegally unlock the locking / unlocking device 1, the tool or the like is inserted into the key hole 13. However, since the shape does not match the key hole 13 correctly, the engagement convex portion 33 cannot be engaged, and the engagement convex portion 33 is thereby pressed. Then, the sliding piece 31 having the engagement convex portion 33 as the distal end slides and moves radially outward through the insertion hole 29 of the inner cylinder 11 and presses the supporting piece 37 that is in contact with the proximal end. . As shown in FIG. 7, the support piece 37 is deformed, that is, crushed by the pressing force, and the slide piece 31 slides and retreats through the insertion hole 29, and its base end is the space portion 35 of the outer cylinder 7. Will move in. As a result, the sliding piece 31 is positioned at the boundary portion 27 between the inner cylinder 11 and the outer cylinder 7, and even if the sliding piece 31 is forced to rotate, the inner cylinder 11 cannot be rotated. Lock operation becomes impossible.
[0038]
Therefore, in the locking / unlocking device 1 configured in this way, in order to rotate the inner cylinder 11 of the cylinder lock 3 with respect to the outer cylinder 7, each tumbler pin 17 is moved to a predetermined position in the axial direction of the through hole 15. The key 51 must be inserted into the key hole 13, and the shear line 25 of each tumbler pin 17 must be aligned with the boundary 27, and the shape of the key hole 13 and the outer shape of the insertion part 55 of the key 51 are inserted in the key hole 13. And the engagement concave portion 61 and the engagement convex portion 33 must be fitted to each other.
[0039]
As a result, the shape of the key hole 13 of the cylinder lock 3 is circular compared to a conventional locking / unlocking device that uses a flat joint key and rotates the inner cylinder of the cylinder lock. Even if an unauthorized operation is performed, that is, when the inner cylinder 11 is to be rotated, the inner cylinder 11 is not configured to be rotated, and thus the inner cylinder 11 cannot be rotated structurally. A high locking / unlocking device can be obtained. In particular, since the shape of the insertion part 55 of the joint key 51 is a columnar shape compared to a conventional flat joint, the depth of the dimple 59 can be configured in multiple stages, and Since the outer diameter can be combined with the small-diameter portion 57 and the like, it is possible to increase the combinations with different keys.
[0040]
Further, according to the locking / unlocking device 1, the sliding piece 31 that can slide in the radial direction in the inner cylinder 11 is provided, and the support piece 37 that can be crushed is provided on the outer cylinder 7 on the outer peripheral side of the sliding piece 31. With the provided structure, the sliding piece 31 moves to the boundary portion 27 between the outer cylinder 7 and the inner cylinder 11 by inserting a tool or the like other than the fitting key 51 into the key hole 13. This makes the inner cylinder 11 unrotatable with respect to the outer cylinder 7, so if an unauthorized unlocking operation is performed with something other than the key 51, the cylinder lock 3 becomes inoperable, that is, the locked state is maintained. It is possible to prevent the crime that is illegally unlocked.
[0041]
In the embodiment described above, the structure of the key 51 is such that the small diameter portion 57 is provided in the middle of the insertion portion 55. However, the formation position of the small diameter portion 57 is located at the insertion portion 55. It may be formed at other positions together with the dimples 59 to be formed, and the key difference is increased by using various combinations such as the formation position of the narrow diameter portion 57 and the dimple 59 and the diameter of the narrow diameter portion 57. It becomes possible.
[0042]
Further, the position of the sliding piece 31 having the engaging convex portion 33 disposed in the key hole 13 of the cylinder lock 3 is positioned in the back of the key hole 13, and the joint key corresponding to the engaging convex portion 33 is located. Although the configuration has been described in which the engaging concave portion 61 of the insertion portion 55 is disposed at the tip of the insertion portion 55, the engaging convex portion 33 is disposed in the middle portion in the key hole 13, and the engagement key portion 55 is engaged in the middle portion. For example, the concavity 61 may be provided as another position.
[0043]
【The invention's effect】
As described above, in the locking and unlocking device according to the present invention, the shape of the insertion portion of the key is a circular column with a circular cross section, and the shape of the key hole is a circular hole. Even if you try to lock a tool or the like in the key hole, it is impossible to rotate the inner cylinder because it is not shaped in the rotation direction, and you can get a locking and unlocking device with high crime prevention. Will be. In this locking / unlocking device, in order to rotate the inner cylinder of the cylinder lock with respect to the outer cylinder, a key for moving each tumbler pin to a predetermined position in the axial direction is inserted into the key hole, and a shear line of each tumbler pin is inserted. In the key hole, the shape of the key hole should match the outer shape of the insertion part of the fitting key, and the engagement recess and the engagement protrusion should be fitted to each other. Therefore, duplication of the key cannot be easily performed, and from this, it is possible to obtain a locking / unlocking device with high crime prevention.
[0044]
In addition, since the shape of the insertion part of the joint key is a columnar shape compared to a conventional flat joint key, the depth of the recess can be configured in multiple stages, and the outer diameter of the insertion part is small. Since it can be combined with a part or the like, it is possible to increase combinations with different keys.
[0045]
Furthermore, by making the engagement convex portion and the engagement concave portion long in the axial direction, the engagement state between the engagement convex portion and the engagement concave portion becomes long in the meshing in the circumferential direction, The pivoting operation of the engagement key on the engagement recess side can be reliably transmitted to the inner cylinder on the engagement projection side, and the inner cylinder can be locked and unlocked by the engagement key.
[0046]
In addition, by providing a sliding piece that can be slid in the radial direction in the inner cylinder, and by providing a crushable support piece on the outer cylinder on the outer peripheral side of this sliding piece, tools other than fitting keys, etc. Is inserted into the key hole, the sliding piece moves to the boundary between the outer cylinder and the inner cylinder, which makes the inner cylinder unrotatable with respect to the outer cylinder. If you try to operate with something other than the key, the cylinder lock becomes inoperable, that is, you can keep the locked state and make it unusable, and you can prevent illegal unlocking crimes .
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an embodiment of a locking / unlocking device according to the present invention.
FIG. 2 is a side sectional view of a cylinder lock of the locking / unlocking device.
FIG. 3 is a front view of a cylinder lock of the locking / unlocking device.
FIG. 4 is a front sectional view of a cylinder lock of the locking / unlocking device.
FIG. 5 is a side view showing the key of the locking / unlocking device.
FIG. 6 is a front view showing the key of the locking / unlocking device.
FIG. 7 is a front sectional view showing an operation state of the locking and unlocking apparatus.
FIG. 8 is a perspective view showing a key of a conventional locking / unlocking device.
FIG. 9 is a cross-sectional view of a combination key.
FIG. 10 is a cross-sectional view showing a cylinder lock of a conventional locking / unlocking device.
FIG. 11 is a cross-sectional view showing a cylinder lock of a conventional locking / unlocking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Locking / unlocking device 3 ... Cylinder lock 7 ... Outer cylinder 11 ... Inner cylinder 13 ... Key hole 17 ... Tumbler pin 25 ... Shear line 27 ... Boundary part 29 ... Insertion hole 31 ... Sliding piece 33 ... Engaging convex part 35 ... Space Portion 37 ... Supporting piece 51 ... Joint key 55 ... Insertion portion 57 ... Small diameter portion 59 ... Recess (dimple)
61 ... engaging recess

Claims (3)

A cylinder lock having an outer cylinder and an inner cylinder rotatable with respect to the outer cylinder, in which a tumbler pin extends through the outer cylinder and the inner cylinder, in a key hole formed in the inner cylinder By inserting a lock key, the tumbler pin is moved from the key hole to a predetermined position in the radial direction, and the shear line of the tumbler pin is aligned with the boundary between the outer cylinder and the inner cylinder, thereby rotating the inner cylinder. A locking / unlocking device for releasing the movement restriction,
An inner cylinder with a keyhole formed in a circular hole shape;
An insertion key that is inserted into the key hole is formed in a cylindrical shape having a circular cross section, and a plurality of recesses that are combined in depth corresponding to the tumbler pin are formed on the outer peripheral surface of the insertion part; ,
An engagement projection that is disposed at a predetermined position in the key hole of the inner cylinder and projects inward in the key hole;
An engagement recess formed on the outer peripheral surface of the key and engaging with the engagement protrusion;
With comprising a,
An insertion hole is formed in the inner cylinder in the radial direction, and a sliding piece whose tip is the engagement convex portion is provided in the insertion hole so as to be slidable in the radial direction of the inner cylinder,
A space portion is formed on the inner peripheral surface of the outer cylinder corresponding to the insertion hole, and the engagement convex portion protrudes into the key hole in contact with the base end of the sliding piece in the space portion. A support piece that supports and crushes without being restored to its original shape by a pressing force is provided.
At the time of operation by the fitting key, the shear line is matched, the engagement convex portion and the engagement concave portion are fitted, and the shape inside the key hole and the shape of the fitting key insertion portion are matched, The turning operation of the key is transmitted to the inner cylinder,
When an object having a shape that does not properly fit the keyhole is inserted, the engagement convex portion is pressed, and the support piece is crushed by sliding of the slide piece, and the inner cylinder and the outer cylinder A locking / unlocking device according to claim 1, wherein the sliding piece is positioned at a boundary portion between the inner cylinder and the inner cylinder to prevent rotation . Claim insertion portion of the case key is, unlike the outer diameter via a step portion in the axial direction, are formed in multiple stages, provided with a small-diameter portion, characterized in that the tip is formed in a conical shape The locking / unlocking device according to 1.   The engaging projection is formed in a long ridge shape that is parallel to the axial direction of the inner cylinder, and the engaging recess is a long groove that is parallel to the axial direction of the insertion portion. The locking / unlocking device according to claim 1, wherein the locking / unlocking device is formed.

Images