Cylinder locks and doors

Abstract

To provide a cylinder lock capable of preventing a driver pin from falling down in the inside of a pin hole even when the driver pin is made shorter.SOLUTION: A cylinder lock has an external cylinder and an internal cylinder that rotatably engages with the external cylinder. A hole part in communication with a keyhole is formed on the external cylinder and the internal cylinder so as to allow a driver pin to be inserted therethrough. Diameter of the driver pin on the external cylinder side is larger than diameter of the driver pin on the internal cylinder side. It is preferable that a posture keeping area having a predetermined length in an axial direction and a fixed diameter be provided on an end of the driver pin on the external cylinder side.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] Conventionally, cylinder locks that are installed on doors of houses and the like have been known. A cylinder lock has an outer cylinder, an inner cylinder that rotatably fits into the outer cylinder, and a driver pin and a tumbler pin that restrict the rotation of the inner cylinder. An unlocking key that corresponds to the cylinder lock has a concave or convex portion formed at 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 the tumbler pin with the sheer line, which is the outer circumferential surface of the inner cylinder, the inner cylinder becomes rotatable (see, for example, Patent Document 1). This allows the cylinder lock to be locked and unlocked. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-170363 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to compact a cylinder lock for purposes such as space saving and manufacturing cost reduction, it is necessary to shorten the overall length of the driver pin. However, a certain clearance is provided between the driver pin and the pin hole of the outer cylinder in which the driver pin is housed. Therefore, simply shortening the overall length of the driver pin could result in the driver pin falling over inside the pin hole. To avoid this, narrowing the clearance between the driver pin and the pin hole could be considered. However, with this measure, there is a possibility that the driver pin will not be inserted into the pin hole of the inner cylinder due to misalignment between the pin hole of the outer cylinder and the pin hole of the inner cylinder. Because the inner cylinder is rotatably fixed to the outer cylinder, it is impossible to completely eliminate misalignment between the pin hole of the outer cylinder and the pin hole of the inner cylinder.

[0005] The present disclosure has been made in consideration of the above, and aims to provide a cylinder lock that can prevent the driver pin from falling over inside the pin hole even when the driver pin is shortened. [Means for solving the problem]

[0006] The present disclosure relates to a cylinder lock comprising an outer tube and an inner tube rotatably fitted to the outer tube, wherein the outer tube and inner tube have holes formed therein that communicate with a keyhole and through which a driver pin can be inserted, and wherein the diameter of the driver pin on the outer tube side is larger than the diameter of the driver pin on the inner tube side. [Brief explanation of the drawings]

[0007] [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] FIG. 2 is a side view of the inner cylinder according to the embodiment. [Figure 5] FIG. 2 is a side view of the outer cylinder according to the embodiment. [Figure 6] FIG. 2 is a front view of a driver pin and a tumbler pin according to the embodiment. [Figure 7] 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

[0008] <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 Figs. 1 and 2, the cylinder lock 10 has an inner cylinder 2, an outer cylinder 3, a decorative member 4, a driver pin 61, and a tumbler pin 62. The inner cylinder 2 is rotatably fitted to the fixed outer cylinder 3.

[0009] (inner cylinder) As shown in Fig. 2, the inner cylinder 2 is a substantially cylindrical member that rotatably fits into the outer cylinder 3. There are no particular restrictions on the material of the inner cylinder 2, but it is made of a metal such as brass, for example. The inner cylinder 2 fits into the outer cylinder 3 with its outer peripheral surface 20, which is the sliding surface, abutting against the 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.

[0010] 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.

[0011] As shown in FIG. 4 , a flange portion 23 is provided on the end surface of the inner tube 2 on the side where the unlocking key 5 is inserted. The flange portion 23 may be formed integrally with the inner tube 2 or may be a separate member from the inner tube 2. Near the end surface of the inner tube 2 opposite the side where the unlocking key 5 is inserted, a groove portion 24 is provided, into which a pair of fixing pins 7 can be fitted. In this embodiment, the groove portion 24 is a groove portion provided along the circumferential direction of the inner tube 2. As shown in FIG. 4 , a recess having a width L1 in side view is formed between the flange portion 23 and the fixing pin 7 that fits into the groove portion 24. A portion of the outer tube 3 fits into the recess, thereby allowing the inner tube 2 to rotatably fit relative to the outer tube 3. The fit between the inner tube 2 and the outer tube 3 will be described in detail later.

[0012] (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.

[0013] 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.

[0014] As shown in Fig. 5, a pair of holes 33 into which a pair of fixing pins 7 can be inserted are formed on the outer peripheral surface of the outer cylinder 3. Similar to the pin holes 32, the holes 33 are holes that communicate with the hole 31. The holes 33 are provided near the end face on the side opposite to the end face 31a on one side of the outer cylinder 3 shown in Fig. 5.

[0015] The engagement between the inner tube 2 and the outer tube 3 will be described below. In the positional relationship shown in FIG. 2, the outer tube 3 is inserted from the end face of the inner tube 2 opposite the end face on which the flange portion 23 is provided. This causes one end face 31a of the outer tube 3 to abut against the inner end face 23a of the flange portion 23, as shown in FIG. 5. In this state, when a pair of fixing pins 7 are inserted into the holes 33, the pair of fixing pins 7 engage with the grooves 24 formed in the inner tube 2, as shown in FIG. 4. This results in the engagement between the inner tube 2 and the outer tube 3. At this time, the inner tube 2 must be rotatable relative to the outer tube 3. Therefore, the length L2 between the end face 31a and the end of the fixing pin 7 when the fixing pin 7 is inserted into the outer tube 3, as shown in FIG. 5, is slightly smaller than the width L1 of the recess, and a clearance is provided by the difference between L1 and L2. Therefore, when the inner tube 2 and the outer tube 3 are mated and the unlocking key 5 is inserted into or removed from the keyhole 21, the positions of the pinholes 22 and 32 may be misaligned by the amount of the clearance.

[0016] (Decorative materials) As shown in FIG. 1, the decorative member 4 is a member that covers and decorates the front surface of the cylinder lock 10, that is, the surfaces of the inner cylinder 2 and the outer cylinder 3 facing the keyhole 21. The decorative member 4 has a hole that is arranged to communicate with the keyhole 21. The decorative member 4 is not particularly limited, but is made of metal or the like. A plating layer or the like may be formed on the surface of the decorative member 4 to enhance the design. The decorative member 4 makes the inner cylinder 2 and the outer cylinder 3 almost invisible from the outside. Instead of the decorative member 4, 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.

[0017] (driver pins, tumbler pins) The driver pin 61 and the tumbler pin 62 are generally cylindrical members slidably received in the pin holes 22 and 32. The tumbler pin 62 is a pin disposed on the keyhole 21 side, and as shown in FIG. 6, the tip 62b that comes into contact with the unlocking key 5 has a rounded shape, and an expanded diameter portion 62a is provided at the end that comes into contact with the driver pin 61. 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 pair of the driver pin 61 and the tumbler pin 62, there are multiple pairs of driver pins 61 and tumbler pins 62 that are received in multiple pairs 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. The number of rows in which the driver pins 61 and tumbler pins 62 are arranged in the axial direction of the keyhole 21 is not limited to six, and can be any number, for example, three or more rows.

[0019] As shown in FIG. 6 , the driver pin 61 and the tumbler pin 62 are in contact with each other at the tapered portion 61b1 of the driver pin 61 and the tapered portion 62a1 of the tumbler pin 62, respectively. In this embodiment, the inner tube 2 and the outer tube 3 are substantially cylindrical, and therefore the shear line SL is curved along the outer peripheral surface 20 of the inner tube 2 (the inner peripheral surface 30 of the outer tube 3). Therefore, if the contact portion between the driver pin 61 and the tumbler pin 62 were flat, the shapes of the contact portion and the shear line SL would not match when the inner tube 2 is rotated in synchronization with the unlocking key 5, and the rotation would not be synchronized. For this reason, providing the tapered portion at the contact portion between the driver pin 61 and the tumbler pin 62 allows the inner tube 2 to rotate in synchronization with the unlocking key 5. In this embodiment, the tops of the tapered portions 61b1 and 62a1 are partially flat.

[0020] [Driver pin] The driver pin 61 is biased toward the keyhole 21 by a biasing member (not shown). As shown in FIG. 3, when the unlocking key 5 is not inserted into the keyhole 21, the driver pin 61 is positioned between the inner cylinder 2 and the outer cylinder 3, thereby restricting the rotation of the inner cylinder 2. The lengths of the driver pins 61 and tumbler pins 62 and the irregularities formed on the surface of the unlocking key 5 are set so that, when the unlocking key 5 is inserted into the keyhole 21, the contact surface between the driver pin 61 and the tumbler pins 62 is aligned with the sheer line SL, which is the contact surface between the inner cylinder 2 and the outer cylinder 3. By rotating the unlocking key 5 with the contact surface between the driver pin 61 and the tumbler pins 62 aligned with the sheer line SL, the inner cylinder 2 rotates in unison with the unlocking key 5. This allows, for example, the deadbolt of a door to be inserted or removed to lock or unlock the cylinder lock 10.

[0021] As shown in FIG. 6 , the diameter L41 of the driver pin 61 on the outer tube 3 side is larger than the diameter L5 of the driver pin 61 on the inner tube 2 side. By making the clearance between the diameter L41 and the diameter L3 of the pin hole 32 smaller than in the past, the driver pin 61 can be prevented from tipping over in the pin hole 32 even when the overall length of the driver pin 61 is shortened. Here, we will consider a case where the diameter of the driver pin 61 is constant and the clearance between the diameter L41 and the diameter L3 of the pin hole 32 is smaller than in the past. In this case, the driver pin 61 can be prevented from tipping over in the pin hole 32. However, due to misalignment between the pin hole 22 and the pin hole 32, the driver pin 61 housed in the pin hole 32 may not be inserted into the pin hole 22. On the other hand, the diameter L5 of the driver pin 61 on the inner tube 2 side in the present disclosure is smaller than the diameter L41 on the outer tube 3 side. Therefore, the driver pin 61 can be inserted into the pin hole 22 while still achieving the tipping prevention effect.

[0022] In this embodiment, the driver pin 61 has a position-maintaining region 61a and a communication region 61b. The position-maintaining region 61a is a region arranged on the outer cylinder 3 side, and the communication region 61b is a region arranged on the inner cylinder 2 side.

[0023] As shown in Fig. 6, the posture maintaining region 61a preferably has a substantially rectangular parallelepiped shape in side view and is a region having a constant diameter L41 for a predetermined length L42 in the axial direction from the end of the driver pin 61 on the outer tube 3 side. That is, a step 61c is preferably provided between the posture maintaining region 61a and the communication region 61b. This preferably prevents the driver pin 61 from tipping over in the pin hole 32. In addition to the above, the posture maintaining region 61a may have a tapered shape in which the end of the driver pin 61 located on the outer tube 3 side has the largest diameter and the diameter gradually decreases from there toward the inner tube 2 side.

[0024] When the posture maintaining region 61a is a region having a predetermined axial length L42 from the end of the driver pin 61 on the outer cylinder 3 side as described above and a constant diameter L41, the ratio of the axial length L42 of the posture maintaining region 61a to the diameter L41, i.e., axial length / diameter, is preferably 0.3 or greater. This prevents the driver pin 61 from tipping over in the pin hole 32 and shortens the overall length of the driver pin 61. From the viewpoint of reliably preventing the driver pin 61 from tipping over in the pin hole 32, the axial length / diameter is preferably 0.5 or greater.

[0025] The communication region 61b is a region having a constant diameter L5 that extends a predetermined length in the axial direction from the end of the driver pin 61 on the inner cylinder 2 side. The diameter L5 of the communication region 61b is smaller than the diameter L41 of the posture maintaining region 61a. The communication region 61b allows the driver pin 61 to be inserted into the pin hole 22 even if the positions of the pin holes 22 and 32 are misaligned when the unlocking key 5 is inserted into or removed from the keyhole 21.

[0026] When the diameter L41 of the posture maintaining region 61a is approximately equal to the diameter L3 of the pin hole 32, it is preferable that the difference between the diameter L41 of the posture maintaining region 61a and the diameter L5 of the communication region 61b be equal to or greater than the difference between L1 and L2, which corresponds to the clearance between the inner tube 2 and the outer tube 3. The clearance corresponds to the maximum magnitude of the misalignment between the pin hole 22 and the pin hole 32. Therefore, by making the difference between L5 and L41 equal to or greater than the clearance, the communication region 61b can be inserted into the pin hole 22 even if the pin hole 22 and the pin hole 32 are misaligned.

[0027] The position maintaining region 61a and the communication region 61b may be configured as separate bodies, but from the viewpoint of ensuring processing precision, it is preferable that they are formed as an integrated body.

[0028] [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.

[0029] <Door> As shown in Figure 7, the door 100 according to this embodiment is placed in a door opening A of a building skeleton 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.

[0030] 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.

[0031] In the above embodiment, the communication region 61b has been described as a region having a constant diameter L5 over a predetermined length in the axial direction from the end of the driver pin 61 on the inner cylinder 2 side. However, this is not limited to the above. The communication region 61b may also be a region whose diameter varies in the axial direction, such as a tapered shape.

Claims

1. An outer cylinder and an inner cylinder rotatably fitted to the outer cylinder, The outer cylinder and the inner cylinder are formed with holes that communicate with the keyholes and through which a driver pin and a tumbler pin can be inserted, a position-maintaining area is provided on the outer cylinder side of the driver pin, a communication region is provided on the inner cylinder side of the driver pin, a diameter of the attitude maintaining region is larger than a diameter of the communication region; a total axial length of the driver pin and the tumbler pin is equal to or less than twice the diameter of the attitude maintaining region, A cylinder lock, wherein the diameter of the posture maintaining region and the diameter of the hole portion of the outer cylinder are approximately equal in size.

2. A cylinder lock as described in claim 1, wherein the clearance between the communication region and the inner surface of the hole portion of the inner tube is greater than the clearance between the posture-maintaining region and the inner surface of the hole portion of the outer tube.

3. The cylinder lock according to claim 1 or 2, wherein a step portion is formed between the posture maintaining region and the communication region.

4. 3. The cylinder lock according to claim 1, wherein the ratio of the axial length to the diameter of the position-maintaining region, ie, axial length / diameter, is 0.3 or more.

5. The length L2 of the portion where the outer cylinder is fitted to the inner cylinder is shorter than the length L1 of the portion where the inner cylinder is fitted to the outer cylinder, and a clearance corresponding to the difference between L1 and L2 is formed. The cylinder lock according to any one of claims 1 to 4, wherein a difference between a diameter of the driver pin on the outer cylinder side and a diameter of the driver pin on the inner cylinder side is equal to or greater than the clearance.

6. A door equipped with the cylinder lock according to any one of claims 1 to 5.

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