Cylinder locks and doors

Abstract

To provide a cylinder lock capable of preventing unauthorized unlocking caused by inserting a rotary tool into a keyhole.SOLUTION: A cylinder lock in which a rotating member that can rotate around an axis of a keyhole is arranged at an inner depth part of the keyhole into which an unlocking key is inserted. A rotating tool inserted into the keyhole contacts the rotating member, and the rotating tool and the rotating member rotate in synchronization. In other words, the rotating tool, undergoing an idle rotation, cannot easily destroy the rotating member. This prevents destruction of the inner depth part of the keyhole. It is preferred that the plurality of rotating members are arranged.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to cylinder locks and doors. [Background technology]

[0002] Conventionally, cylinder locks have been known for installation on doors of houses and the like. A cylinder lock has an outer cylinder, an inner cylinder that rotatably fits into the outer cylinder, and a driver pin and tumbler pin that restrict the rotation of the inner cylinder. The unlocking key corresponding to the cylinder lock has a concave / convex portion formed on the contact portion with the tumbler pin. By inserting the unlocking key into the keyhole of the cylinder lock and aligning the contact surfaces of the driver pin and tumbler pin with the sheer line, which is the outer circumferential surface of the inner cylinder, the inner cylinder becomes rotatable. This allows the cylinder lock to be locked and unlocked.

[0003] Cylinder locks for residential use are required by law to display security performance indicators. One of these indicators is resistance to destructive unlocking by rotary tools such as drills. One technique for preventing destructive unlocking by rotary tools is to provide a freely rotating cover at the tip of the cylinder lock, preventing the cylinder from being destroyed from its inner tube (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-9090 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional anti-destructive unlocking technologies, such as the technology disclosed in Patent Document 1, are technologies that prevent the destruction of the outer and inner cylinders themselves. However, no countermeasures have been implemented to prevent unauthorized unlocking, such as inserting a drill directly into a keyhole, destroying the back of the keyhole and enabling the destruction or operation of components such as deadbolts that lock and unlock doors in conjunction with the rotation of the inner cylinder. Conventional cylinder locks have a long keyhole depth compared to their small diameter, and even if a thin drill is inserted directly into the keyhole, there is a high probability that the tip of the drill will break. Therefore, no countermeasures have been considered to prevent such unauthorized unlocking. However, in recent years, there has been a demand for more compact cylinder locks to save space and reduce manufacturing costs. Therefore, there is a need for countermeasures to prevent such unauthorized unlocking for cylinder locks with shorter keyhole depths than conventional locks.

[0006] The present disclosure has been made in consideration of the above, and aims to provide a cylinder lock that can prevent unauthorized unlocking by inserting a rotary tool into the keyhole. [Means for solving the problem]

[0007] The present disclosure relates to a cylinder lock in which a rotating member that is rotatable around the axis of a keyhole is disposed deep inside the keyhole into which an unlocking key is inserted. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view showing the configuration of the cylinder lock according to the present embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the cylinder lock according to the present embodiment. [Figure 3] FIG. 2 is a cross-sectional perspective view showing the configuration of the cylinder lock according to the present embodiment. [Figure 4] 1 is a front view of a door equipped with a cylinder lock according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Cylinder lock> As shown in Fig. 1, the cylinder lock 10 according to this embodiment is used in a locking device 1 together with an unlocking key 5 that can lock and unlock the cylinder lock 10. As shown in Fig. 2, the cylinder lock 10 has an inner cylinder 2, an outer cylinder 3, decorative members 41 and 42, a housing 43, a driver pin 61, a tumbler pin 62, and a rotating member 7. The inner cylinder 2 is rotatably fitted to the fixed outer cylinder 3.

[0010] (inner cylinder) As shown in Fig. 2, the inner cylinder 2 is a substantially cylindrical member that rotatably fits into the outer cylinder 3. The material of the inner cylinder 2 is not particularly limited, but it is made of a metal such as brass, for example. The inner cylinder 2 fits into the outer cylinder 3 by having an outer peripheral surface 20, which is the sliding surface, abut against an inner peripheral surface 30 of the outer cylinder 3. A keyhole 21, into which an unlocking key 5 can be inserted, is formed in the inner cylinder 2 along the axial direction of the inner cylinder 2. In this embodiment, the keyhole 21 has a circular cross-sectional shape.

[0011] As shown in Fig. 2, a plurality of pin holes 22 communicating with the keyhole 21 are formed in the outer peripheral surface 20 of the inner cylinder 2. The plurality of pin holes 22 are holes into which at least a portion of the driver pin 61 and the tumbler pin 62 can be inserted and removed. Each of the plurality of pin holes 22 has a cylindrical inner peripheral surface 22a. The pin holes 22 according to this embodiment are formed in a plurality of rows along the axial direction of the inner cylinder 2, and a plurality of sets of the plurality of rows of pin holes 22 are formed in the circumferential direction of the inner cylinder 2.

[0012] As shown in Figure 3, the interior of the keyhole 21 is provided with a space in which the driver pin 61 and tumbler pin 62 are disposed, and a pair of pins 91 that come into contact with the tip of the unlocking key 5 inserted into the keyhole 21. A driver 81 that rotates in unison with the inner cylinder 2 is provided at the deepest part of the keyhole 21. The driver 81 engages with a groove (not shown) provided in the inner cylinder 2 and is fixed in place by a stop plate 82 so that it cannot be removed. The driver 81 transmits a rotational force to a locking mechanism such as a deadbolt on the door, thereby locking or unlocking the door.

[0013] (Outer cylinder) As shown in Figure 2, the outer cylinder 3 is a substantially cylindrical member into which the inner cylinder 2 can be fitted in a hole 31 formed inside. The material of the outer cylinder 3 is not particularly limited, but it may be made of a metal such as brass, similar to the inner cylinder 2. The outer cylinder 3 is fixed so that it cannot rotate. The inner peripheral surface 30 of the outer cylinder 3, which is the sliding surface, abuts against the outer peripheral surface 20 of the inner cylinder 2, fitting with the inner cylinder 2.

[0014] The outer cylinder 3 is formed with a hole 31 along the axial direction of the outer cylinder 3, into which the inner cylinder can be fitted. A plurality of pin holes 32 communicating with the hole 31 are formed on the outer peripheral surface of the outer cylinder 3. The plurality of pin holes 32 are holes into which at least a portion of the driver pin 61 and the tumbler pin 62 can be inserted and removed. Each of the plurality of pin holes 32 has a cylindrical inner peripheral surface 32a. The plurality of pin holes 22 and the plurality of pin holes 32 communicate with each other so that at least a portion of the driver pin 61 and the tumbler pin 62 can be inserted and removed when the inner cylinder 2 is rotated relative to the outer cylinder 3 to a predetermined position.

[0015] (Decorative materials) As shown in FIG. 1, the decorative members 41 and 42 are members that cover and decorate the surfaces of the inner cylinder 2 and the outer cylinder 3 facing the keyhole 21, which are the front surfaces of the cylinder lock 10. The decorative members 41 and 42 have holes that are arranged to communicate with the keyhole 21. The decorative members 41 and 42 are made of, but are not limited to, metal or the like. A plating layer or the like may be formed on the surfaces of the decorative members 41 and 42 to enhance the design. The decorative members 41 and 42 make the inner cylinder 2 and the outer cylinder 3 almost invisible from the outside. Instead of the decorative members 41 and 42, at least the front surfaces of the inner cylinder 2 and the outer cylinder 3 may be decorated by forming a plating layer or the like.

[0016] (housing) The housing 43 is a member that houses the inner cylinder 2 and the outer cylinder 3 and is fixed to a door body, etc. The housing 43 is provided with a hole through which a fixing tool is inserted.

[0017] (driver pins, tumbler pins) The driver pin 61 and the tumbler pin 62 are generally cylindrical members that are slidably housed in the pin holes 22 and 32. The tumbler pin 62 is a pin that is placed on the keyhole 21 side, and as shown in FIG. 3, the tip that comes into contact with the unlocking key 5 has a rounded shape. One end of the driver pin 61 comes into contact with the tumbler pin 62, and the other end comes into contact with a biasing member (not shown). Although FIG. 2 omits some parts and shows only one set of the driver pin 61 and the tumbler pin 62, there are multiple sets of driver pins 61 and tumbler pins 62 that are housed in multiple sets of the pin holes 22 and 32.

[0018] In this embodiment, the driver pins 61 and tumbler pins 62 are arranged in six rows in the axial direction of the circular keyhole 21. Because the cross-sectional shape of the keyhole 21 is circular, the driver pins 61 and tumbler pins 62 can be arranged in any number of rows along the axial direction of the keyhole 21. This allows the lengths of the inner cylinder 2 and the outer cylinder 3 to be shortened without reducing the security level of the locking device 1. The number of rows of the driver pins 61 and tumbler pins 62 arranged in the axial direction of the keyhole 21 is not limited to six, and is preferably, for example, three or more rows. In order to ensure that the number of rows of the driver pins 61 and tumbler pins 62 in the axial direction is greater than or equal to a predetermined number, the diameter L2 of the keyhole 21 is preferably 4 mm or greater.

[0019] (Rotating member) As shown in FIG. 3 , the rotating member 7 is a member disposed between the pin 91 and the driver 81 at the innermost portion of the keyhole 21. The rotating member 7 is a member that can rotate in either direction around the axis of the keyhole 21. Even if a person attempting to illicitly unlock the lock inserts a rotary tool such as a drill into the keyhole 21 and attempts to attack the driver 81, the rotating member 7 is located in front of the driver 81, so the rotating member 7 must first be destroyed. However, when the tip of the drill or the like is pressed against the rotating member 7, the rotating member 7 rotates freely in either direction, making it difficult to destroy the rotating member 7. Therefore, the rotating member 7 can prevent illicit unlocking by inserting a rotary tool into the keyhole 21.

[0020] In this embodiment, the rotating member 7 is a cylindrical member having a predetermined thickness. The above-mentioned predetermined thickness means a thickness that prevents the rotating member 7 from falling over inside the keyhole 21. The shape of the rotating member 7 is not limited to the above-mentioned cylindrical shape as long as it can rotate in either the left or right direction around the axis of the keyhole 21, but it is preferable that the cross-sectional shape be circular, similar to the keyhole 21.

[0021] The material constituting the rotating member 7 is not particularly limited as long as it has a predetermined hardness or more, but is preferably metal from the viewpoints of hardness, frictional force, workability, availability, etc. Materials other than metal may also be plastics, etc.

[0022] 3, the rotating member 7 has a diameter that is approximately the same as the diameter of the keyhole 21, but this is not limited thereto, and the rotating member 7 may have a diameter smaller than the keyhole 21 as long as it does not fall over inside the keyhole 21. This allows the rotating member 7 to be arranged inside the keyhole 21 so that it can rotate in either the left or right direction around the axis of the keyhole 21. Furthermore, the rotating member 7 can be arranged inside the keyhole 21 without providing a separate member to fix the rotating member 7. Therefore, the movement of the rotating member 7 in the axial direction of the keyhole 21 is not particularly restricted, and it can move between the pin 91 and the driver 81.

[0023] It is preferable to provide multiple rotating members 7. If there is only one rotating member 7 having a cylindrical shape, when the tip of a drill or the like is pressed against the rotating member 7, frictional force generated between the rotating member 7 and a member disposed behind the rotating member 7 may inhibit the rotation of the rotating member 7 and potentially result in the destruction of the rotating member 7. However, by providing multiple rotating members 7, the rotating member 7 on the front side contacts the rotating member 7 on the rear side over a wide area, making it easier for the rotating members 7 to slide against each other. This makes it possible to easily avoid the situation where the rotation of the rotating member 7 is inhibited, using a simple configuration. When providing multiple rotating members 7, it is preferable to provide multiple rotating members 7 having similar cylindrical shapes. There is no particular limitation on the number of rotating members 7 when providing multiple rotating members 7.

[0024] [Unlocking key] The unlocking key 5 is an unlocking key that can lock and unlock the cylinder lock 10. In this embodiment, the insertion portion of the unlocking key 5 into the keyhole 21 has a cylindrical shape. The unlocking key 5 in FIG. 1 is illustrated as a blank key. When the unlocking key 5 is actually applied to the cylinder lock 10, recesses are formed on the outer surface of the insertion portion according to the lengths and arrangement of each driver pin 61 and tumbler pin 62 of the cylinder lock 10.

[0025] By forming the recesses as described above in a cylindrical shape for the insertion portion of the unlocking key 5, the key is less likely to deform during processing compared to when creating an unlocking key by forming recesses and protrusions on a conventional plate-shaped key, and an unlocking key 5 with a highly accurate shape can be created. This makes it possible to increase the number of rows of driver pins 61 and tumbler pins 62 arranged in the axial direction that correspond to the same size unlocking key 5. Therefore, even for cylinder locks with the same security level, the overall length of the inner cylinder 2 and outer cylinder 3 can be shortened, and installation space can be reduced.

[0026] The tip of the unlocking key 5 is provided with a recess that can be fitted with a pin 91 provided at the end of the keyhole 21. By fitting the recess with the pin 91, the unlocking key 5 can be rotated in unison with the inner cylinder 2.

[0027] <Door> As shown in Figure 4, the door 100 according to this embodiment is placed in a door opening A in a building frame so as to be able to open and close. The door 100 has a handle 9 for opening and closing the door 100 at the door end, and a pair of cylinder locks 10 disposed above and below the handle 9. The door 100 is used, for example, as a front door.

[0028] The cylinder lock and the door according to the embodiment of the present disclosure have been described above. However, the present disclosure is not limited to the above embodiment and can be modified as appropriate.

Claims

1. A rotary member that can rotate around the axis of the keyhole is disposed deep inside the keyhole into which the unlocking key is inserted, The keyhole is provided with a pin that can fit onto the tip of the unlocking key, The rotating member has a cylindrical shape, A cylinder lock in which a plurality of the rotating members are arranged between the pin and a driver that rotates in synchronization with the inner cylinder of the cylinder lock to lock and unlock the door.

2. A cylinder lock as described in Claim 1, wherein movement of the rotating member in the axial direction of the keyhole is not restricted between the pin and the driver.

3. 2. The cylinder lock according to claim 1, wherein three or more rows of driver pins and tumbler pins are arranged along the axial direction of the keyhole.

4. A door equipped with the cylinder lock according to any one of claims 1 to 3.

Images