Pin cylinder lock

Abstract

To provide a pin cylinder lock capable of suppressing so-called picking that is fraudulent unlocking of the pin cylinder lock, by extending the required time to unlock the lock.SOLUTION: A pin cylinder lock of the present invention is configured by providing a conventional pin cylinder lock with at least one set of upper pins 5f and lower pins 7f whose boundary coincides with the shear line 9 when they come into contact with the sliding contact portion 10f of the key inserted into the pin cylinder lock, which makes searching the boundary between the upper and lower pins significantly different from that of conventional upper and lower pins, thereby lengthening the time until the lock is opened, resulting in an effect of suppressing a picking.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention suppresses so-called picking for illegally unlocking a pin cylinder lock, and aims to deter improper acts by causing it to take more time than necessary for unlocking.

[0002] Note that picking is an illegal act of unlocking without using a key by applying a rotational force to the inner cylinder, pushing up the lower pins with a special tool for illegal unlocking, aligning the boundary line between the upper pins and the lower pins with the shear line which is the boundary line between the inner cylinder and the outer cylinder.

[0003] A conventional cylinder lock will be described with reference to FIG. 2. 1 is an outer cylinder, 2 is an inner cylinder having a keyhole 3 rotatably inserted into the outer cylinder 1, and 4a to 4e are a plurality of pin holes provided in communication with the outer cylinder 1 and the inner cylinder 2. 5a to 5e are upper pins respectively provided movably with respect to the respective pin holes 4a to 4e of the outer cylinder 1 and biased toward the inner cylinder 2 by springs 6a to 6e, and 7a to 7e are lower pins respectively provided movably with respect to the respective pin holes 4a to 4e of the inner cylinder 1. The pin cylinder lock configured as described above enables the inner cylinder 2 to rotate by the key 8 when the recesses 8a to 8e on the upper end side of the key 8 inserted into the keyhole 3 respectively contact the lower pins 7a to 7e and the boundary between the upper pins 5a to 5e and the lower pins 7a to 7e provided in the pin holes 4a to 4e of the outer cylinder 1 and the inner cylinder 2 coincides with the shear line 9 which is the boundary line between the outer cylinder 1 and the inner cylinder 2, thereby unlocking.

[0004] In the conventional pin cylinder lock described above, the recesses 8a to 8e of the key 8 are provided at the upper end, but there is also a so-called dimple type in which recesses are provided on the front and back surfaces of the key. Compared with the conventional pin cylinder lock in which the recesses are provided at the ends of the key, in this dimple type pin cylinder lock, recesses are provided on the front and / or back surface of the key. Therefore, the number of recesses can be increased, the number of sets of upper and lower pins of the cylinder lock can be increased, the configuration of the cylinder lock can be made complicated, it can be difficult to pick the lock illegally, the directionality when inserting the key into the cylinder lock can be eliminated, and the operability with the proper key can be improved.

[0005] As described above, in the dimple type cylinder lock, by increasing the number of upper and lower pins, it has the effect of increasing the time until the lock is picked during picking and suppressing the illegal act of picking, and can also improve the convenience by eliminating the restriction on the directionality when inserting the key. It is used as such.

Prior Art Documents

[0006]

Patent Documents

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the pin cylinder lock as described above, the number of recesses cannot be increased, there is a limit to suppressing picking, and even in the dimple type, although the number of recesses can be increased, there are problems such as an increase in manufacturing cost.

Means for Solving the Problems

[0008] In order to solve the above problems, in the pin cylinder lock of the present invention, in addition to the configuration of the conventional pin cylinder lock, at least one set of upper and lower pins whose boundary coincides with the shear line when the lower pin abuts against the sliding contact portion of the key with the keyhole is provided in the pin holes provided in communication with the outer cylinder and the inner cylinder.

[0009] Further, the sliding contact portion where the set of upper and lower pins abut is provided at at least one of the upper and lower ends of the key.

[0010] Further, the sliding contact portion where the set of upper and lower pins abut is provided on at least one of the flat plate portions on the front and back surfaces of the key.

[0011] Further, the sliding contact portion where the set of upper and lower pins abut is provided on the tip side of the key.

[0012] Further, the set of upper and lower pins provided at the intermediate positions of the respective upper and lower pins are provided to abut against the sliding contact portion between the respective recesses.

Advantages of the Invention

[0013] Regarding the pin cylinder lock of the present invention, attention is paid to the fact that the key 8 for unlocking inserted into the keyhole 3 provided in the inner cylinder 2 is slidably contacted and guided inside the keyhole and guided to the normal unlocking position, and the sliding contact portion of the key for this guidance is utilized.

[0014] That is, at least one set of upper and lower pins whose boundary coincides with the shear line when the lower pin abuts against the sliding contact portion of the key with the keyhole inserted into the pin cylinder lock is provided in the pin holes provided in communication with the outer cylinder and the inner cylinder.

[0015] By adding at least this set of upper and lower pins, the boundary of the upper and lower pins can be made to coincide with the shear line at a position significantly different from that of the other upper and lower pins related to the concave portion of the conventional key. This makes the search for the boundary of the upper and lower pins very different from that of the conventional upper and lower pins, prolonging the time until unlocking and achieving an effect of suppressing picking.

[0016] In addition, in the case where the sliding contact portion with which the set of upper and lower pins abuts is provided at at least one of the upper and lower ends of the key, since it is provided by extending from the conventional upper and lower pins, it can be formed by continuously adding to the manufacturing process of the conventional pin cylinder lock, so the burden on the manufacturing cost is small.

[0017] In addition, in the case where the sliding contact portion with which the set of upper and lower pins abuts is provided on at least one of the flat plate portions on the front and back surfaces of the key, while having the above effect, in the case where only one of the flat plate portions on the front and back surfaces of the key of the dimple type cylinder lock is used as the sliding contact portion (only this set of upper and lower pins), since the number of upper and lower pins corresponding to the concave portions on the front and back of the key is not the same, it confuses the picking operation, takes time to determine the unlocking means, and has the effect of suppressing picking.

[0018] In addition, in the case where the sliding contact portion with which the set of upper and lower pins abuts is provided on the tip side of the key, by providing the set of upper and lower pins deep inside the lock, it is difficult to visually recognize and difficult to perform the picking operation, making it difficult to unlock.

[0019] In addition, in the case where the set of upper and lower pins provided at the intermediate positions of the respective upper and lower pins abut against the sliding contact portion between the respective concave portions, by providing the set of upper and lower pins, the positional relationship between which is significantly different from the boundary between the other upper and lower pins and the shear line, at the intermediate positions of the respective upper and lower pins, it complicates the picking operation and makes unlocking more complicated.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Embodiment for Carrying Out the Invention

[0021] Hereinafter, a cylinder tablet according to an embodiment of the present invention will be described with reference to FIG. 1. Note that the same parts as those in the prior art are given the same numbers, and the description thereof will be omitted. 10a to 10e are recesses provided at the upper end of the key 10, and are the same as the recesses 8a to 8e of the key 8 described in the prior art. According to this figure, 4f is a pin hole provided in communication with the outer cylinder 1 and the inner cylinder 2 provided side by side with 4a to 4e, 5f is an upper pin biased toward the inner cylinder 2 side by a spring 6f, and 7f is a lower pin inserted into the pin hole 4f of the inner cylinder 1 and having one end in contact with the upper pin 5f.

[0022] When the key 8 is inserted into the keyhole 3 to unlock it, the other end of the lower pin 7f contacts not the recesses such as 8a to 8f on the end face of the key 8, but the sliding contact portion 10f, and at this time, the boundary between the upper pin 5f and the lower pin 7f is set to coincide with the shear line 9.

[0023] Note that the sliding contact portion 10f is a portion for positioning and guiding when the key 10 is inserted into the keyhole 3, and corresponds to an unprocessed portion in a blank key for manufacturing a so-called spare key. With the above configuration, when the key 8 is inserted into the keyhole 3 to unlock it, the boundaries of all the upper pins 5a to 5g and the lower pins 7a to 7g all coincide with the shear line 9, and it is unlocked.

[0024] As described above, the contact portion 10f that comes into contact with the upper pin 5g and the lower pin 7g, and the relationship between the upper pins 5a to 5e, the lower pins 7a to 7e and the concave portions 8a to 8e of the key 8 are significantly different. By setting the boundary between the upper and lower pins as the shear line and making it coincide with the shear line, when picked, the search for the boundary between the upper and lower pins is made very different from that of the conventional upper and lower pins, lengthening the time until unlocking and obtaining an effect of suppressing picking.

[0025] In the above embodiments, the upper pin 5f and the lower pin 7f are provided deep inside the lock. However, this also makes it difficult to visually recognize and difficult to perform the picking operation. It is also possible to provide the positions of the upper pin 5f, the lower pin 7f, and the contact portion 10f of the key in the middle of the upper pins 5a to 5f and the lower pins 7a to 7f. By doing so, it is also possible to make the picking operation complicated and cumbersome and suppress the picking operation.

[0026] Although one embodiment of the present invention using a general pin cylinder lock has been described, in a dimple type cylinder lock as well, at least one upper and lower pin is added, and the flat portion on the front or back surface of the key is used as the contact portion to bring the lower pin of the upper and lower pins into contact. The boundary between the upper and lower pins is made to coincide with the shear line at a position significantly different from that of the upper and lower pins related to the concave portion of the conventional key, making the search for the boundary between the upper and lower pins very different from that of the conventional upper and lower pins, lengthening the time until unlocking, and it is possible to suppress picking.

[0027] In this dimple type cylinder lock, concave portions are provided on both the front and back surfaces of the key, doubling the number of sets of upper and lower pins to make picking time-consuming. By using only the flat portion on either the front or back surface as the contact portion and providing one set of upper and lower pins of this embodiment, the number of sets of pins increases by one set only on one side. Therefore, it may be misunderstood that a prevention means different from conventional picking is additionally used, and an effect of suppressing picking can also be obtained. Also, in this embodiment as well as in the previous embodiments, it is also possible to provide a set of additional upper and lower pins and a sliding contact portion at the tip side of the key, or at an intermediate position between other upper and lower pins. In any case, the effect of suppressing picking can be obtained.

Industrial Applicability

[0028] As described above, the cylinder lock of the present invention provides an upper and lower pin that abuts at least against the sliding contact portion of the key, thereby exerting an effect of suppressing picking work. Since it can be achieved by providing at least a pair of upper and lower pins on the cylinder lock side, it can be performed at a relatively low cost.

Explanation of Signs

[0029] 1 Outer cylinder 2 Inner cylinder 3 Keyhole 4a, 4b, 4c, 4d, 4e, 4f Pin holes 5a, 5b, 5c, 5d, 5e, 5f Upper pins 6a, 6b, 6c, 6d, 6e, 6f Springs 7a, 7b, 7c, 7d, 7e, 7f Lower pins 9 Shur line 10 Key 10a, 10b, 10c, 10d, 10e (of key 10) Recesses 10f Sliding contact portion

Claims

1. A pin cylinder lock has an outer tube, an inner tube that is rotatably inserted into the outer tube and has a keyhole, a plurality of pin holes that communicate with the outer tube and inner tube, and respective upper pins that are movably inserted into each pin hole of the outer tube and that bias each lower pin on the inner tube side by a spring, and when each lower pin fits into each recess of the key inserted into the keyhole, the boundaries of the upper and lower pins in the pin holes of the outer tube and inner tube coincide with the shear line that is the boundary between the outer tube and the inner tube, allowing the inner tube to rotate by the key.In this pin cylinder lock, at least one set of upper and lower pins whose boundary coincides with the shear line when the lower pin abuts the sliding contact part of the key with the keyhole is provided in pin holes that communicate with the outer tube and inner tube.

2. 2. A pin cylinder lock according to claim 1, wherein the sliding contact portions with which the pair of upper and lower pins abut are at least either the upper or lower end of the key.

3. 2. A pin cylinder lock according to claim 1, wherein the sliding contact portions with which the pair of upper and lower pins abut are flat portions on at least one of the front and back surfaces of the key.

4. 3. A pin cylinder lock according to claim 1, wherein the sliding contact portions with which the pair of upper and lower pins abut are located on the tip side of the key.

5. 3. The pin cylinder lock according to claim 1, wherein the pair of upper and lower pins provided at intermediate positions between the upper and lower pins abuts against the sliding contact portion between the recesses.

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