JP2010001697A - Cylinder lock and key - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock which is high in prevention performance against picking and tampering, and improved in crime prevention performance, and to provide a key for use for the lock. <P>SOLUTION: The cylinder lock includes: a cylinder having a keyhole formed therein; an external cylinder rotatably supporting the cylinder; and tumblers which are slidably inserted into a tumbler hole communicating from the keyhole to the cylinder and the external cylinder, for switching rotation of the cylinder between an inhibited mode and an allowed mode. The cylinder lock is characterized in that an axis of the keyhole is formed like a circular arc extending from an entrance in a deep end direction. The tumblers may be pin tumblers or disk tumblers. Further preferably the axial line extending from the entrance of the keyhole in the deep end direction cross a center axis of the cylinder. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylinder lock and a key having a key hole with a specific shape, and more particularly to a cylinder lock and a key that suppress a failure due to picking or mischief to the key hole.

  In recent years, crimes called picking in which a special tool is used to operate the tumbler in the keyhole to perform unauthorized unlocking, and mischief of inserting a foreign object into the keyhole have frequently occurred.

  As cylinder locks, in general, a cylinder with a plurality of pin tumblers (pin cylinder lock), a pin tumbler made into a plate shape (disc cylinder lock), and a dimple that is a mortar-shaped recess are shown. There are those using a key provided at a predetermined position on the back surface (dimple lock which is a kind of pin cylinder lock). The mechanism of unlocking these locks is that each tumbler moves to a predetermined position along the tumbler hole of the cylinder by inserting the key into the key hole of the inner cylinder (cylinder), and the cylinder is moved to the outer cylinder (outer peripheral part). They are common in that they rotate.

  As is well known, the pin cylinder lock is a tumbler pin and a driver that are urged in the direction of the center axis of the cylinder in each of a plurality of pin holes (tumbler holes) penetrating the inner cylinder (cylinder) and the outer cylinder (outer shell). It contains a set of pins, and when the key is inserted into the key hole and the key groove is engaged with the inner end of the corresponding tumbler pin, the joint part of the tumbler pin and driver pin is aligned as a shear line. is there.

  The disk cylinder lock is a pin tumbler formed into a plate shape, and a large number of thin plates can be arranged, so that the number of key differences can be increased as compared with the pin cylinder lock. All of the disk tumblers of the disk cylinder lock are contained in the inner cylinder (cylinder) and project toward the outer cylinder (outer shell) by a spring. When the key is inserted into the key hole, the disc tumbler is slid to a predetermined position and aligned as a shear line in accordance with the depth of the key groove.

  A general pin cylinder lock is shown in FIG. The pin cylinder lock shown in FIG. 4 mainly includes a cylinder 51 having a key hole 52 and an outer cylinder 50, a plurality of tumbler holes 53 communicating from the key hole 52 to the cylinder 51 and the outer cylinder 50, and the tumbler hole 53. A spring 54, a driver pin 55, and a tumbler pin 56 are disposed in order from the bottom. The driver pin 55 and the tumbler pin 56 are biased toward the keyhole 52 by the spring 54. By inserting the key 57, the tumbler pin 56 is engaged with the groove of the key 57 and the shear line 58 is aligned, so that the cylinder 51 can be rotated together with the tumbler pin 56, leaving the driver pin 55 in the outer shell. It becomes.

  In such a pin cylinder lock, as a preventive measure against the above-mentioned picking and mischief, a method of projecting the pin from the upper or vertical direction, not only from the top but also from many directions, and a method of increasing the number of steps of the pin In addition, various mechanisms have been adopted, and in addition, a mechanism for making the unlocking operation difficult by providing a pair of plate-like shutters that can cover a part of the keyhole in the width direction (Japanese Patent Laid-Open No. 2003-155852) And a cylinder mechanism (Japanese Patent Laid-Open No. 2007-9521) with an increased number of key differences by adopting a tumbler structure that rotates in both directions from the localization position to the left and right sides.

  On the other hand, a key made of a shape memory member (Japanese Utility Model Laid-Open No. 02-56271) has been proposed as a key for the cylinder lock which is deformed at room temperature and does not enter the keyhole and can be used by heating.

Although these measures improve the difficulty of picking, etc., the keyhole of the lock has a straight line from the entrance to the back end direction (in other words, from the base of the key inserted into the keyhole) (Because the axial direction toward the insertion end is a straight line), it has a fundamental disadvantage that it can be unlocked by inserting a straight tool all the way into the keyhole and operating and deforming the tumbler. Therefore, it is desired to develop a lock and a key with further improved performance for preventing picking and tampering with a keyhole.
JP 2003-155852 A Japanese Patent Laid-Open No. 2007-9521 Japanese Utility Model Publication No. 02-56271

  The present invention has been made in view of the above-described disadvantages, and an object of the present invention is to provide a lock and a key with a higher prevention property such as picking than a lock and a key according to the prior art.

The invention made to solve the above problems is
A cylinder having a keyhole;
An outer cylinder that rotatably supports the cylinder;
A cylinder lock comprising a tumbler that is slidably inserted from a key hole into a tumbler hole that communicates with the cylinder and the outer cylinder, and that switches regulation and allowance of rotation of the cylinder,
The keyhole is a cylinder lock characterized in that an axis from the inlet toward the back end forms an arc.

  With such a cylinder lock, even if a straight tool is inserted all the way into the keyhole, it is very difficult to operate and deform the tumbler, preventing malfunctions due to picking and tampering with the keyhole, and preventing crime. Significantly improved. Specifically, for picking, it is necessary to move the tumbler in the back of the keyhole to a predetermined position, and in the cylinder lock, a linear tool is inserted to the back of the keyhole. I can't.

  The tumbler may be a pin tumbler or a disk tumbler. Each tumbler is generally installed in a tumbler hole via a spring. Regardless of which tumbler is used in the cylinder lock of the present invention, the effect of improving crime prevention against picking and mischief to the keyhole is achieved by the fact that the axis from the keyhole entrance to the back end direction forms an arc. Is obtained.

  It is preferable that the axis from the keyhole entrance to the back end direction intersects the central axis of the cylinder. By setting the spatial relationship between the axis from the keyhole inlet to the back end and the center axis of the cylinder in this way, it is very easy to insert a straight tool into the back end of the keyhole when picking or tampering The security against picking and mischief to the keyhole is further improved. Moreover, according to the said means, the increase in the cylinder diameter by making an axis line into a circular arc can be suppressed.

  Although the said tumbler may be single or plural, it is preferable from the viewpoint of picking prevention. In the case where there are a plurality of tumblers, it is more preferable to provide a plurality of tumblers at a plurality of positions in a predetermined cross section in the direction from the inlet of the cylinder toward the back.

  In this way, by providing a plurality of tumblers at a plurality of positions in a predetermined cross section in the direction from the cylinder inlet to the back, the cylinder can be rotated only by a key having a shape corresponding to a complicated tumbler pattern. Therefore, crime prevention against picking and mischief is further enhanced.

  There can be a plurality of the keyholes. In the case where a plurality of key holes are provided, the cylinder is allowed to rotate only by a key having a shape corresponding to the plurality of key holes, so that crime prevention against picking and mischief is further enhanced. That is, by using a plurality of key holes, the tumbler pattern becomes complicated, and the shape of the key that allows the cylinder to rotate is complicated, thereby improving the security.

  The cylinder lock can be rotated by a key having an outline that matches the outline formed by the tumbler and the wall surface of the keyhole when the cylinder lock is allowed to rotate. In order to unlock the cylinder lock, it is necessary to use a key having a unique shape that matches the cylinder lock. As a result, picking and mischief are prevented, and the crime prevention performance is remarkably improved.

  It is preferable that the center of the head of the key is located substantially on the extension line of the center axis of the cylinder. Here, the key needs to have a unique shape that matches the above cylinder lock, but by making the center of the head of the key such a position, the unlocking operation rotates the head in general. The key operability can be improved with the same feeling as a conventional key unlocking operation.

  The “outer cylinder” of the lock means the outer shell of the cylinder, and as long as it has an inner wall surface with a circular cross section in the direction from the cylinder inlet to the back so that the cylinder can rotate, its shape is particularly It is not limited.

  The “axis line” from the keyhole entrance to the back end direction means an axis formed by the center line of the keyhole cross section in the direction from the keyhole entrance to the back end.

  The “regulation” and “allowance” of the rotation of the cylinder mean a state where the rotation of the cylinder is impossible with respect to the outer cylinder and a state where the rotation is possible. In the cylinder lock, the key is inserted into and engaged with the keyhole, and the rotation of the cylinder relative to the outer cylinder is allowed by aligning the shear line of the tumbler at a predetermined position.

  An axis extending from the keyhole inlet to the back end direction “crosses” the center axis of the cylinder means that an arc of the axis (X in FIG. 1 described later) extends from the inlet to one side outside the cylinder, and It means a state in which it curves to the opposite side in the middle and intersects with the central axis of the cylinder (Y in FIG. 1 described later) on the tip side.

  The “head” of the key is a portion protruding from the keyhole in a state where the key is inserted / engaged in the keyhole, and means a portion held by the operator during the locking / unlocking operation.

  As described above, with the cylinder lock of the present invention, it is very difficult to operate and deform the tumbler even if a straight tool or the like is inserted into the keyhole. Is significantly improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a schematic sectional view showing a key lock mechanism (cylinder lock and key) according to an embodiment of the present invention, and FIG. 2 is a schematic view showing a key lock mechanism according to a different form from the key lock mechanism of FIG. FIG. 3 is a schematic cross-sectional view showing a key lock mechanism according to a different form from the key lock mechanism of FIGS. 1 and 2.

  1 mainly includes an outer cylinder 1, a cylinder 2, a key hole 3, a tumbler hole 4, a spring 5, a driver pin 6, a tumbler pin 7, and a key 8.

  The outer cylinder 1 has an inner wall surface having a circular cross section in the direction from the inlet to the inner part of the cylinder 2 so that the cylinder 2 can rotate.

  The cylinder 2 is disposed adjacent to the inner wall surface of the outer cylinder 1 so as to be rotatable in the circumferential direction. If the cross-sectional shape of the cylinder 2 is a shape other than a circle, the cylinder 2 needs to be a circle because rotation with respect to the outer cylinder 1 becomes impossible. The radius of the cross section of the cylinder 2 is appropriately selected depending on the use of the lock, and can be generally 0.7 centimeters or more and 5 centimeters or less.

  The cylinder 2 has a key hole 3 for inserting a key, and a tumbler hole 4 configured to communicate from the key hole 3 to the cylinder 2 and the outer cylinder 1.

  In the keyhole 3, the axis from the entrance to the back end forms an arc. By making the keyhole 3 into such an arc shape, it becomes very difficult to operate and deform the tumbler even if a straight tool is inserted to the back of the keyhole, and troubles due to picking or tampering with the keyhole are effective. Is prevented.

  The arc formed by the axis extending from the entrance of the keyhole 3 toward the far end must form a part of a circle having a certain curvature so that the key can be inserted. The radius of curvature of the arc formed by the axis extending from the entrance of the keyhole 3 to the back end direction is not particularly limited, but is preferably 2 centimeters or more and 10 centimeters from the viewpoint of ease of key insertion and picking prevention. Hereinafter, it is particularly preferably 3 cm or more and 5 cm or less. When the radius of curvature is less than 2 centimeters, it becomes difficult to insert the key. Moreover, when a curvature radius exceeds 10 cm, it will become difficult to manufacture a tablet with high picking prevention property.

  Further, as shown in the drawing, it is preferable that an axis X (forming an arc) from the entrance of the keyhole 3 toward the far end is “crossed” with the center axis Y of the cylinder. This relationship between X and Y makes it very difficult to insert a straight tool into the back end of the keyhole during picking or tampering, and further improves the security against picking or tampering with the keyhole. The

  The maximum length of the axis extending from the entrance of the keyhole 3 to the back end is not particularly limited as long as it is not more than half of the outer circumference of the circle formed by the axis. When the length of the axis exceeds half of the outer circumference of the circle formed by the axis, it becomes difficult to insert and engage the key into the keyhole.

  The cross-sectional shape of the keyhole 3 is not particularly limited as long as the key can be inserted. For example, the cross-sectional shape of the keyhole can be made to be rectangular, circular, or the like by matching the cross-sectional shape of the key. Moreover, you may form at least one part of the cross-sectional shape in a curve like a circular engraving sword. By combining such deformation of the cross-sectional shape of the keyhole with complication of the tumbler pattern, the prevention against picking can be further improved.

  The tumbler hole 4 is a cylindrical hole and is configured to communicate from the key hole 3 to the cylinder 2 and the outer cylinder 1. A plurality of tumbler holes 4 are provided (four are illustrated in the figure), and are arranged in a line on one side of the keyhole 3 (inside the arc). In the tumbler hole 4, a spring 5, a driver pin 6, and a tumbler pin 7 are disposed in this order from the bottom side.

  The driver pin 6 and the tumbler pin 7 may be singular or plural in number, but as shown in the figure (four examples), a plurality of tumblers are preferable from the viewpoint of preventing picking. The number of tumblers is more preferably 3 or more, and particularly preferably 5 or more. In addition to the number of tumblers, by further complicating the length and spacing pattern of the tumblers, further improvement in picking prevention is expected. The length of the tumbler of the cylinder lock can be usually 3 mm or more and 3 cm or less. The shape of the tumbler hole 4 is not particularly limited as long as the tumbler is a shape that can be stored when the key is not inserted or inserted.

  Each of the tumblers including the driver pin 6 and the tumbler pin 7 needs to have a shape that can be engaged with each groove of the key 8 when the cylinder is allowed to rotate. Moreover, since the axis line from the entrance of the keyhole 3 toward the far end forms an arc, the shape of the key engagement portion of each tumbler is determined in view of the ease of insertion and extraction of the key into the keyhole. Is preferred. For example, the shape of the key engaging portion of each tumbler can be engaged with the shape of each groove portion of the key, and it is preferable that the key can be operated with a small resistance when the key is inserted into and removed from the key hole.

  The tumbler including the driver pin 6 and the tumbler pin 7 is urged toward the keyhole 3 by the spring 5, but the tip of the tumbler protrudes into the keyhole 3 at all times. By inserting the key 8 from the entrance of the arc formed by the axis of the keyhole 3 toward the back end, the contour of the key 8 and the contour formed by the tumbler (tumbler pin 7) and the wall surface of the keyhole 3 are aligned. . At this time, the cylinder 2 can be rotated together with the driver pin 6 with respect to the outer cylinder 1 by aligning the boundary between the driver pin 6 and the tumbler pin 7 with the shear line 9 at a predetermined position. In the present embodiment, an example using a pin tumbler is shown. However, even when a disk tumbler having a tumbler plate shape is used, the rotation of the cylinder with respect to the outer cylinder is permitted / restricted based on the same principle.

  The shape and material of the key 8 are not particularly limited as long as the key 8 has a contour that matches the contour formed by the wall of the tumbler and the keyhole when cylinder rotation is permitted. Since the axis from the entrance of the key hole 3 toward the far end forms an arc, the shape of each groove portion of the key 8 that engages with each tumbler is easy to insert and remove the key 8 into the key hole 3. It is preferable to determine in view of the above. For example, the shape of each groove portion of the key 8 is preferably engageable with the shape of the key engaging portion of each tumbler and can be operated with a small resistance when the key 8 is inserted into and removed from the key hole 3. .

  As shown in the drawing, it is preferable that the center of the head of the key is located on a substantially extended line of the central axis of the cylinder. By setting the position of the head of the key in this way, the unlocking operation can be performed with the same feeling as a general key unlocking operation, and the operability of the key is improved.

  Various metals and resins can be used for each member of the cylinder lock and the key material, but the material is not particularly limited. From the viewpoint of strengthening crime prevention and strength, a hard metal or the like is preferable. For example, hard heat resistant materials such as stainless steel, hardened steel, titanium alloy, and ceramics can be used as the material for the cylinder lock members and the key. The molding method of each member of the cylinder lock and the key is not particularly limited, and known methods such as injection molding, extrusion molding, press molding, and cutting can be used.

  The cylinder lock and the key may be colored in an arbitrary color by a paint or the like according to the user's preference and from the viewpoint of crime prevention.

  According to the key lock mechanism of the present embodiment, even if a straight tool is inserted into the keyhole, it is very difficult to operate and deform the tumbler. Significantly improved. Further, a key having a unique shape is required for unlocking such a key lock mechanism (in order to allow the cylinder to rotate), thereby significantly improving crime prevention.

  The key lock mechanism of FIG. 2 is provided with four tumblers each consisting of driver pins 6 and tumbler pins 7 in two upper and lower rows on the paper surface in a predetermined cross section in the direction from the inlet of the cylinder 2 to the inner part. Since the other configuration is the same as that of the key lock mechanism of FIG. 1, the same reference numerals are given to the members of the key lock mechanism, and description thereof is omitted.

  As shown in FIG. 2, when the tumblers are provided at a plurality of positions in the cylinder cross section, it is necessary to unlock them with a key having a shape corresponding to a complicated pattern of the tumblers. .

  The key lock mechanism of FIG. 3 is provided with two key holes 3, corresponding to each of the key holes 3, four rows of tumblers (driver pin 6 and tumbler pin 7) from the top of the paper, and from the bottom of the paper. Four tumblers in one row are arranged. The key 8 is bifurcated corresponding to the two key holes 3 and has key holes that can be engaged with two rows of tumblers. Since the other configuration is the same as that of the key lock mechanism of FIG. 1, the same reference numerals are given to the members of the key lock mechanism, and description thereof is omitted.

  As shown in FIG. 3, when a plurality of keyholes are provided in the cylinder lock, the cylinder is allowed to rotate by a key having a shape corresponding to the plurality of keyholes, so that crime prevention against picking and mischief is further enhanced. That is, by using a plurality of key holes, the tumbler pattern becomes complicated, and the shape of the key that allows the cylinder to rotate is complicated, thereby improving the security.

  In the above-described embodiments, specific examples of the key lock mechanism using the pin tumbler have been described. However, the numbers and shapes of the cylinder lock and the key of the present invention are not limited to these embodiments. For example, even when a disc tumbler is used, as with a key lock mechanism using a pin tumbler, the axis of the keyhole forms an arc, so that failure due to picking or mischief is prevented, and crime prevention is remarkably improved. There is an effect that.

  The lock and key of the present invention can be combined with other crime prevention strengthening methods such as, for example, other known cylinder locks and keys, key storages, and key information reading devices. Such a combination further improves crime prevention.

  The locks and keys of the present invention can be used in any application where crime prevention is required, such as cars, motorcycles, furniture, house doors, money boxes. In any of these applications, the locks and keys of the present invention prevent malfunctions due to picking and mischief, and the crime prevention performance is remarkably improved.

It is a typical section showing a key lock mechanism (cylinder lock and key) concerning one embodiment of the present invention. It is typical sectional drawing which shows the key lock mechanism which concerns on the form different from the key lock mechanism of FIG. It is a typical section showing a key lock mechanism concerning a form different from the key lock mechanism of Drawing 1 and Drawing 2. It is typical sectional drawing which shows the key lock mechanism which concerns on a prior art.

Explanation of symbols

1 outer cylinder 2 cylinder 3 key hole 4 tumbler hole 5 spring 6 driver pin
7 Tumbler pin 8 Key 9 Shear line X Axis Y from the keyhole inlet to the back end Y Center axis of the cylinder

Claims (7)

A cylinder having a keyhole;
An outer cylinder that rotatably supports the cylinder;
A cylinder lock comprising a tumbler that is slidably inserted from a key hole into a tumbler hole that communicates with the cylinder and the outer cylinder, and that switches regulation and allowance of rotation of the cylinder,
The cylinder lock according to claim 1, wherein the key hole has an axial line extending from the inlet toward the far end.   The cylinder lock according to claim 1, wherein the tumbler is a pin tumbler or a disk tumbler.   The cylinder lock according to claim 1 or 2, wherein an axis line from the entrance of the key hole toward the back end intersects the central axis of the cylinder.   The cylinder lock according to claim 1, 2 or 3, wherein a plurality of tumblers are provided at a plurality of positions in a predetermined cross section in a direction from the inlet of the cylinder to the inner part.   The cylinder lock according to any one of claims 1 to 4, wherein the cylinder lock has a plurality of the key holes.   A key for unlocking the cylinder lock according to any one of claims 1 to 5, having a contour that matches a contour formed by a tumbler and a wall surface of a keyhole when cylinder rotation is permitted. key.   The key according to claim 6, wherein the center of the head of the key is located on a substantially extension line of the central axis of the cylinder.

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