Cylinder locks and doors

Abstract

To provide a cylinder lock that can prevent the driver pin from tipping over inside the pinhole, even when the driver pin is shortened. [Solution] A cylinder lock comprising an outer cylinder and an inner cylinder that rotatably fits into the outer cylinder, wherein the outer cylinder and inner cylinder have holes that communicate with a keyhole and through which a screwdriver pin can be inserted, and the diameter of the screwdriver pin on the outer cylinder side is larger than the diameter of the screwdriver pin on the inner cylinder side. Preferably, the outer cylinder side end of the screwdriver pin is provided with a posture-holding region having a predetermined length and a constant diameter in the axial direction.

Description

Technical Field

[0001] The present disclosure relates to a cylinder lock and a door.

Background Art

[0002] Conventionally, a cylinder lock installed on a door of a house or the like is known. The cylinder lock has an outer cylinder, an inner cylinder rotatably fitted in the outer cylinder, a driver pin for restricting the rotation of the inner cylinder, and a tumbler pin. The unlocking key corresponding to the cylinder lock has irregularities 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 the tumbler pin with the shear line which is the outer peripheral surface of the inner cylinder, the inner cylinder becomes rotatable (see, for example, Patent Document 1). Thereby, the locking and unlocking of the cylinder lock are performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in order to make cylinder locks more compact for purposes such as saving space and reducing manufacturing costs, it is necessary to shorten the overall length of the screwdriver pin. On the other hand, a certain clearance is provided between the screwdriver pin and the pinhole in the outer cylinder in which the screwdriver pin is housed. Therefore, if the overall length of the screwdriver pin is simply shortened, there is a possibility that the screwdriver pin may tip over inside the pinhole. To avoid the above situation, it is conceivable to narrow the clearance between the screwdriver pin and the pinhole. However, with the above method, there is a possibility that the screwdriver pin may not be inserted into the pinhole of the inner cylinder due to misalignment between the pinhole of the outer cylinder and the pinhole of the inner cylinder. Since the inner cylinder is fixed so as to be rotatable relative to the outer cylinder, it is impossible to completely eliminate the misalignment between the pinhole of the outer cylinder and the pinhole of the inner cylinder.

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

[0006] This disclosure relates to a cylinder lock comprising an outer cylinder and an inner cylinder rotatably fitted into the outer cylinder, wherein the outer cylinder and the inner cylinder have holes that communicate with a keyhole and through which a screwdriver pin can be inserted, and the diameter of the screwdriver pin on the outer cylinder side is larger than the diameter of the screwdriver pin on the inner cylinder side. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view showing the configuration of the cylinder lock according to this embodiment. [Figure 2] This is an exploded perspective view showing the configuration of the cylinder lock according to this embodiment. [Figure 3] This is a cross-sectional perspective view showing the configuration of the cylinder lock according to this embodiment. [Figure 4] This is a side view of the inner cylinder according to this embodiment. [Figure 5] This is a side view of the outer cylinder according to this embodiment. [Figure 6] This is a front view of the driver pin and tumbler pin according to this embodiment. [Figure 7] This is a front view of a door equipped with a cylinder lock according to this embodiment. [Modes for carrying out the invention]

[0008] <Cylinder lock> As shown in Figure 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 Figures 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 Figure 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 for example, it is made of a metal such as brass. The inner cylinder 2 fits into the outer cylinder 3 by its outer circumferential surface 20, which is a sliding surface, contacting the inner circumferential surface 30 of the outer cylinder 3. The inner cylinder 2 has a keyhole 21 into which the unlocking key 5 can be inserted, along the axial direction of the inner cylinder 2.

[0010] As shown in Figure 2, a plurality of pin holes 22 communicating with the keyhole 21 are formed on the outer circumferential surface 20 of the inner cylinder 2. The plurality of pin holes 22 are holes through 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 circumferential surface 22a. In this embodiment, a plurality of rows of pin holes 22 are formed 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 Figure 4, a flange portion 23 is provided on the end face of the inner cylinder 2 on the side into which the unlocking key 5 is inserted. The flange portion 23 may be formed integrally with the inner cylinder 2, or it may be a separate component from the inner cylinder 2. Near the end face of the inner cylinder 2 opposite to the side into which the unlocking key 5 is inserted, a groove portion 24 into which a pair of fixing pins 7 can be fitted is provided. In this embodiment, the groove portion 24 is a groove provided along the circumferential direction of the inner cylinder 2. Between the flange portion 23 and the fixing pins 7 that fit into the groove portion 24, a recess having a width L1 in side view is formed, as shown in Figure 4. By fitting a part of the outer cylinder 3 into the above recess, the inner cylinder 2 is rotatably fitted to the outer cylinder 3. The fitted state of the inner cylinder 2 and the outer cylinder 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 into a hole 31 formed on its inside. The material of the outer cylinder 3 is not particularly limited, but for example, it is made of a metal such as brass, similar to the inner cylinder 2. The outer cylinder 3 is fixed so as not to rotate. The outer cylinder 3 fits into the inner cylinder 2 by its inner circumferential surface 30, which is a sliding surface, contacting the outer circumferential surface 20 of the inner cylinder 2.

[0013] The outer cylinder 3 has a hole 31 formed along its axial direction, into which the inner cylinder can be fitted. Multiple pin holes 32 are formed on the outer circumferential surface of the outer cylinder 3, communicating with the hole 31. The multiple 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 multiple pin holes 32 has a cylindrical inner circumferential surface 32a. The multiple pin holes 22 and the multiple pin holes 32 communicate with each other such that when the inner cylinder 2 is rotated relative to the outer cylinder 3 to a predetermined position, at least a portion of the driver pin 61 and the tumbler pin 62 can be inserted and removed.

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

[0015] The state of engagement between the inner cylinder 2 and the outer cylinder 3 is described below. In the positional relationship shown in Figure 2, the outer cylinder 3 is inserted from the end face of the inner cylinder 2 opposite to the end face on which the flange portion 23 is provided, so that one end face 31a of the outer cylinder 3, as shown in Figure 5, comes into contact with the inner end face 23a of the flange portion 23. In this state, when the pair of fixing pins 7 are inserted through the holes 33, the pair of fixing pins 7 engage with the grooves 24 formed in the inner cylinder 2, as shown in Figure 4. This causes the inner cylinder 2 and the outer cylinder 3 to engage. At this time, the inner cylinder 2 needs to be rotatable relative to the outer cylinder 3. For this reason, the length L2 between the end face 31a and the end of the fixing pin 7 in the state shown in Figure 5, where the fixing pins 7 are inserted into the outer cylinder 3, is slightly smaller than the width L1 of the recess, and there is a clearance equal to the difference between L1 and L2. Therefore, when the inner cylinder 2 and the outer cylinder 3 are locked together and the unlocking key 5 is inserted into or removed from the keyhole 21, a misalignment may occur between the positions of the pinholes 22 and 32 due to the aforementioned clearance.

[0016] (Decorative component) As shown in Figure 1, the decorative member 4 is a member that covers and decorates the front surfaces of the cylinder lock 10, specifically the inner cylinder 2 and outer cylinder 3 on the keyhole 21 side. The decorative member 4 has a hole that communicates 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 its aesthetic appeal. The decorative member 4 makes the inner cylinder 2 and 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 outer cylinder 3 may be decorated by forming a plating layer or the like.

[0017] (Driver pin, tumbler pin) The driver pin 61 and the tumbler pin 62 are substantially cylindrical members that are slidably accommodated in the pin holes 22 and 32. The tumbler pin 62 is a pin disposed on the keyhole 21 side. As shown in FIG. 6, the tip 62b that abuts against the key 5 has a rounded shape, and an enlarged diameter portion 62a is provided at the end that abuts against the driver pin 61. The driver pin 61 abuts against the tumbler pin 62 at one end, and the other end abuts against a biasing member (not shown). In FIG. 2, only a set of the driver pin 61 and the tumbler pin 62 is shown with some illustrations omitted, but there are a plurality of sets of the driver pin 61 and the tumbler pin 62, which are accommodated in the plurality of sets of pin holes 22 and 32.

[0018] In the present embodiment, the driver pins 61 and the tumbler pins 62 are arranged in six rows in the axial direction of the circular keyhole 21. The number of arrangements of the driver pins 61 and the tumbler pins 62 in the axial direction of the keyhole 21 is not limited to six rows, and can be, for example, any number of three rows or more.

[0019] As shown in FIG. 6, the driver pin 61 and the tumbler pin 62 abut against each other with the tapered portion 61b1 of the driver pin 61 and the tapered portion 62a1 of the tumbler pin 62, respectively. In the present embodiment, since the inner cylinder 2 and the outer cylinder 3 are substantially cylindrical, the shear line SL is curved along the outer peripheral surface 20 of the inner cylinder 2 (the inner peripheral surface 30 of the outer cylinder 3). Therefore, if the contact portion between the driver pin 61 and the tumbler pin 62 is made planar, when the inner cylinder 2 is rotated in synchronization with the key 5, the shapes of the contact portion and the shear line SL do not match, and synchronous rotation cannot be achieved. For this reason, by providing the tapered portion at the contact portion between the driver pin 61 and the tumbler pin 62, the inner cylinder 2 can be rotated in synchronization with the key 5. In the present embodiment, the tops of the tapered portion 61b1 and the tapered portion 62a1 are partially planar.

[0020] [Driver pin] The driver pin 61 is biased toward the keyhole 21 by a biasing member (not shown). As shown in Figure 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. With the unlocking key 5 inserted into the keyhole 21, the lengths of each driver pin 61 and tumbler pin 62, as well as the irregularities formed on the surface of the unlocking key 5, are set so that the contact surfaces of the driver pin 61 and tumbler pin 62 coincide with the shear 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 surfaces of the driver pin 61 and tumbler pin 62 aligned with the shear line SL, the inner cylinder 2 rotates in sync with the unlocking key 5. This allows, for example, the deadbolt of a door to be extended and retracted, thereby locking and unlocking the cylinder lock 10.

[0021] As shown in Figure 6, the diameter L41 on the outer cylinder 3 side of the driver pin 61 is larger than the diameter L5 on the inner cylinder 2 side of the driver pin 61. By making the clearance between diameter L41 and the diameter L3 of the pin hole 32 smaller than in the conventional design, it is possible to prevent the driver pin 61 from tipping over in the pin hole 32, even if the overall length of the driver pin 61 is shortened. Now, let's consider the case where the diameter of the driver pin 61 is kept constant and the clearance between it and the diameter L3 of the pin hole 32 is smaller than in the conventional design. In this case, although it is possible to prevent the driver pin 61 from tipping over in the pin hole 32, a situation may occur where the driver pin 61 housed in the pin hole 32 cannot be inserted into the pin hole 22 due to the misalignment between the pin hole 22 and the pin hole 32. On the other hand, in this disclosure, the diameter L5 on the inner cylinder 2 side of the driver pin 61 is smaller than the diameter L41 on the outer cylinder 3 side, so the above effect of preventing tipping over can be obtained while also allowing the driver pin 61 to be inserted into the pin hole 22.

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

[0023] The attitude-holding region 61a, as shown in Figure 6, preferably has a substantially rectangular shape in side view and is a region with a constant diameter L41 extending axially for a predetermined length L42 from the end of the driver pin 61 on the outer cylinder 3 side. That is, it is preferable that a step 61c is provided between the attitude-holding region 61a and the communication region 61b. This effectively prevents the driver pin 61 from tipping over in the pin hole 32. In addition to the above, the attitude-holding region 61a may have a tapered shape in which the end of the driver pin 61 located on the outer cylinder 3 side has the largest diameter, and the diameter gradually decreases toward the inner cylinder 2 side.

[0024] If the posture-holding region 61a is a region with a constant diameter L41 that extends axially for a predetermined length L42 from the end of the driver pin 61 on the outer cylinder 3 side, as described above, then the axial length / diameter ratio, which is the ratio of the axial length L42 to the diameter L41 of the posture-holding region 61a, is preferably 0.3 or more. This prevents the driver pin 61 from tipping over in the pin hole 32 and also 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 ratio is preferably 0.5 or more.

[0025] The communication region 61b is a region with a constant diameter L5 that extends axially for a predetermined length from the inner cylinder 2 side end of the driver pin 61. The diameter L5 of the communication region 61b is smaller than the diameter L41 of the posture holding region 61a. The communication region 61b allows the driver pin 61 to be inserted into the pin hole 22 even if there is a misalignment between the positions of the pin holes 22 and 32 when inserting or removing the unlocking key 5 into the keyhole 21.

[0026] When the diameter L41 of the attitude-holding 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 attitude-holding region 61a and the diameter L5 of the communication region 61b is greater than or equal to the difference between L1 and L2, which corresponds to the clearance between the inner cylinder 2 and the outer cylinder 3. This clearance corresponds to the maximum value of the misalignment between the pin holes 22 and 32. Therefore, by making the difference between L5 and L41 greater than or equal to the above clearance, the communication region 61b can be inserted into the pin hole 22 even if there is misalignment between the pin holes 22 and 32.

[0027] The posture-holding region 61a and the communication region 61b may be configured as separate parts, but from the viewpoint of ensuring machining accuracy, it is preferable to form them as a single unit.

[0028] [Unlocking key] The unlocking key 5 is an unlocking key capable of locking and unlocking the cylinder lock 10. In this embodiment, the part of the unlocking key 5 that is inserted into the keyhole 21 has a cylindrical shape. Figure 1 shows a blank key as the unlocking key 5. When the unlocking key 5 is actually applied to the cylinder lock 10, recesses are formed on the outer surface of the insertion part, corresponding to the length 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 installed in a door opening A of a building structure so as to be openable and closable. The door 100 has a handle 9 for opening and closing the door 100 on the leading edge side, and a pair of cylinder locks 10 positioned above and below the handle 9, respectively. The door 100 is used, for example, as an entrance door.

[0030] The cylinder lock and door according to the embodiments of this disclosure have been described above. However, this disclosure is not limited to the embodiments described above and can be modified as appropriate.

[0031] In the above embodiment, the communication region 61b was described as a region with a constant diameter L5 extending axially for a predetermined length from the end of the driver pin 61 on the inner cylinder 2 side. However, it is not limited to the above. The communication region 61b may be a region with a tapered shape or other characteristics, where the diameter differs in the axial direction.

Claims

1. It comprises an outer cylinder and an inner cylinder that rotatably fits into the outer cylinder, The outer and inner cylinders are formed with holes that communicate with the keyhole and through which a screwdriver pin and a tumbler pin can be inserted. A posture-holding region is provided on the outer cylinder side of the driver pin. A communication region is provided on the inner cylinder side of the aforementioned driver pin. The diameter of the posture-holding region is larger than the diameter of the communication region. The sum of the axial lengths of the driver pin and the tumbler pin is no more than twice the diameter of the attitude holding area. The diameter of at least a portion of the attitude-holding region is equal to the maximum diameter of the driver pin. The largest diameter and the diameter of the hole in the outer cylinder are approximately equal in size. Cylinder lock.

2. The cylinder lock according to claim 1, wherein the posture-holding region has a region in which the diameter of the end of the driver pin on the outer cylinder side is larger than the diameter of the end on the inner cylinder side, and the diameters differ in the axial direction.

3. The cylinder lock according to claim 1 or 2, wherein the posture holding region has a tapered shape in which the end of the driver pin on the outer cylinder side has the maximum diameter, and the diameter decreases from the portion with the maximum diameter toward the inner cylinder side.

4. The cylinder lock according to any one of claims 1 to 3, wherein the clearance between the communication region and the inner circumferential surface of the hole in the inner cylinder is greater than the clearance between the posture holding region and the inner circumferential surface of the hole in the outer cylinder.

5. A stepped portion is formed between the posture-holding region and the communication region, as described in any one of claims 1 to 4.

6. The cylinder lock according to any one of claims 1 to 5, wherein the axial length / diameter ratio of the posture-holding region, which is the ratio of the axial length to the diameter, is 0.3 or more.

7. The length L2 of the portion where the outer cylinder engages with the inner cylinder is shorter than the length L1 of the portion where the inner cylinder engages with 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 6, wherein the difference between the diameter of the driver pin on the outer cylinder side and the diameter of the driver pin on the inner cylinder side is greater than or equal to the clearance.

8. A door equipped with a cylinder lock according to any one of claims 1 to 7.

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