Cylinder locks and doors

Abstract

To provide a cylinder lock with a click motion mechanism that enables the cylinder lock to be downsized.SOLUTION: A cylinder lock including an outer cylinder and an inner cylinder rotatably fitted in the outer cylinder, in which a click pin having a cylindrical shape is arranged on either one of the outer cylinder and the inner cylinder, the click pin is arranged so that the axial direction of the cylindrical shape follows the axial direction of the outer cylinder and the inner cylinder, a recess for fitting therein the click pin is formed on the other of the outer cylinder and the inner cylinder, and the click pin suppresses the rotation of the inner cylinder relative to the outer cylinder when the rotation state of the inner cylinder relative to the outer cylinder is in a specific state.SELECTED DRAWING: Figure 4

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 into 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 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 shear line which is the outer peripheral surface of the inner cylinder, the inner cylinder becomes rotatable. Thereby, the locking and unlocking of the cylinder lock are performed.

[0003] Patent Document 1 discloses a cylinder lock provided with a click motion mechanism for accurately and stably holding the cylinder lock at the insertion / removal position of the unlocking key.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The click-motion mechanism for a cylinder lock, including the technology disclosed in Patent Document 1, biases a ball with a spring to make point contact with an inner cylinder or the like, allowing it to rotate, and provides a recess corresponding to the position of the ball when the unlocking key is inserted or removed. When the ball is locked into the recess at the key insertion / removal position, a click sensation is transmitted to the user's fingers, indicating the key insertion / removal position. In the above conventional click-motion mechanism, since the ball makes point contact with a component of the cylinder lock, such as the inner cylinder, a click sensation cannot be obtained unless the ball has a certain diameter, making it difficult to miniaturize the cylinder lock. In addition, there is a risk that the ball and the component such as the inner cylinder with which the ball makes point contact may wear down due to friction, and there is a risk that the ball may get stuck in the recess and become unable to be removed.

[0006] This disclosure has been made in view of the above, and aims to provide a cylinder lock equipped with a click motion mechanism that enables miniaturization of the cylinder lock. [Means for solving the problem]

[0007] This disclosure relates to a cylinder lock comprising an outer cylinder and an inner cylinder rotatably fitted into the outer cylinder, wherein a cylindrical click pin is disposed in either the outer cylinder or the inner cylinder, the axial direction of the cylindrical shape of the click pin is aligned with the axial direction of the outer cylinder and the inner cylinder, a recess is formed in either the outer cylinder or the inner cylinder into which the click pin fits, and the click pin suppresses the rotation of the inner cylinder relative to the outer cylinder when the rotational state of the inner cylinder relative to the outer cylinder is in a specific state. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the configuration of a cylinder lock according to the first embodiment. [Figure 2] This is an exploded perspective view showing the configuration of a cylinder lock according to the first embodiment. [Figure 3] This is a top view of a cylinder lock according to the first embodiment. [Figure 4] This is a cross-sectional view along line AA in Figure 3. [Figure 5] This is a top view of the inner cylinder according to the first embodiment. [Figure 6] Figure 5 is an enlarged view of the main part. [Figure 7] Figure 5 is an enlarged view of the main part. [Figure 8] Figure 3 is a cross-sectional view along line BB. [Figure 9] This is a cross-sectional view corresponding to Figure 4 of the cylinder lock according to the second embodiment. [Figure 10] This is a cross-sectional view corresponding to Figure 4 of the cylinder lock according to the third embodiment. [Figure 11] This is a front view of a door equipped with a cylinder lock according to this embodiment. [Modes for carrying out the invention]

[0009] 《First Embodiment》 <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, a tumbler pin 62, a click pin 7, and a torsion spring 8 as a biasing member. The inner cylinder 2 is rotatably fitted to the fixed outer cylinder 3. The click pin 7 and the torsion spring 8 constitute a click motion mechanism.

[0010] (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.

[0011] 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.

[0012] As shown in Figures 4 to 7, a recess 23 is formed on the outer circumferential surface 20 of the inner cylinder 2, into which the click pin 7 clicks into place. The parts of the recess 23 other than the part into which the click pin 7 clicks into place are closed off by a filler pin 24. A construction pin 25 is in contact with the outer circumferential surface 20, as shown in Figures 5 and 8. The construction pin 25 is removably housed in a hole provided in the outer cylinder 3. Since the recess 23 is formed using an end mill or the like, recesses are formed in places other than the part into which the click pin 7 clicks into place during the molding process. In this embodiment, the recesses 23o other than the part into which the click pin 7 clicks into place overlap with the contact points of the construction pin 25 in the circumferential direction D of the inner cylinder 2. Therefore, by closing the recesses 23o other than the part into which the click pin 7 clicks into place with the filler pin 24, it is possible to prevent the inner cylinder 2 from becoming immobile due to the construction pin 25 getting stuck in the recess 23.

[0013] Figures 6 and 7 are enlarged views of the main part of Figure 5. Figure 6 shows the state before the click pin 7 and the filler pin 24 are placed. Figure 7 shows the state with the click pin 7 and the filler pin 24 in place. As shown in Figure 6, the recess 23o overlaps with the construction pin 25 in the circumferential direction D of the inner cylinder 2. The recess 23o is provided with a hole into which the filler pin 24 can be fitted. As shown in Figure 7, the recess 23o other than the part that fits with the click pin 7 is closed by the filler pin 24.

[0014] The construction pin 25 is part of the construction structure that forms a keyhole 21 corresponding to a construction key different from the unlocking key 5. FIG. 8 corresponds to the cross-sectional view taken along line B-B of FIG. 3 and shows the state of the cylinder lock 10 before the unlocking key 5 is inserted. As shown in FIG. 8, the construction structure includes a construction pin 25, a ball 26, lower pins 27a and 27b, and holes 28a and 28b for accommodating the lower pins 27a and 27b. In the state of FIG. 8, the lower pin 27a protrudes into the keyhole 21. The construction key has a shape corresponding to the shape of the keyhole 21 in which the lower pin 27a protrudes. When the unlocking key 5 is inserted into the keyhole 21 in this state, the lower pin 27a is pushed radially outward by the unlocking key 5, and the ball 26 and the construction pin 25 move toward the outer cylinder 3 side. When the inner cylinder 2 is rotated relative to the outer cylinder 3 in this state, the ball 26 enters the hole 28b for accommodating the lower pin 27b, and the tip of the lower pin 27b pushed out by the ball 26 protrudes into the keyhole 21. With the construction structure having the above configuration, once the unlocking key 5 is inserted into the keyhole 21, the construction key makes it impossible to lock or unlock the cylinder lock 10.

[0015] It is also conceivable to prevent the construction pin 25 from fitting into the recess 23 by configuring the construction pin 25 and a part of the recess 23 not to overlap in the circumferential direction of the inner cylinder 2. However, in this case, it is necessary to increase the axial length of the cylinder lock 10 in order to avoid the above overlap. Therefore, the configuration of the present embodiment in which a part of the construction pin 25 and the recess 23 overlap in the circumferential direction of the inner cylinder 2 and the recesses other than the above fitting portion with the click pin 7 of the recess 23 are closed by the filling pin 24 is preferable from the viewpoint of miniaturizing the cylinder lock 10.

[0016] (Outer cylinder) As shown in Fig. 2, the outer cylinder 3 is a substantially cylindrical member into which the inner cylinder 2 can be fitted with respect to the hole 31 formed on the inside. The material of the outer cylinder 3 is not particularly limited. For example, like the inner cylinder 2, it is made of a metal such as brass. The outer cylinder 3 is fixed so as not to rotate. The inner peripheral surface 30 of the outer cylinder 3, which is a sliding surface, abuts against the outer peripheral surface 20 of the inner cylinder 2 and fits with the inner cylinder 2.

[0017] In the outer cylinder 3, a hole 31 into which the inner cylinder can be fitted is formed along the axial direction of the outer cylinder 3. 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 part of the driver pin 61 and the tumbler pin 62 can be inserted and removed. The plurality of pin holes 32 each have a cylindrical inner peripheral surface 32a. When the inner cylinder 2 is rotated with respect to the outer cylinder 3 to a predetermined position, the plurality of pin holes 22 and the plurality of pin holes 32 communicate with each other so that at least a part of the driver pin 61 and the tumbler pin 62 can be inserted and removed.

[0018] As shown in Figs. Fig. 4 and Fig. 5, the outer cylinder 3 and the inner cylinder 2 are fitted together by a pair of fixing pins 91. The pair of fixing pins 91 are inserted through a hole communicating with the hole 31 from the outer peripheral surface of the outer cylinder 3, and a part of the pair of fixing pins 91 fits into a groove formed along the circumferential direction of the inner cylinder 2. As a result, the inner cylinder 2 is fitted to the outer cylinder 3 so as to be rotatable.

[0019] As shown in Figs. 2 to Fig. 4, the outer cylinder 3 has a recess 33 in which the click pin 7 is disposed. The recess 33 is formed by cutting out an end portion on the side opposite to the side where the unlocking key 5 is inserted into the keyhole 21 of the outer cylinder 3 according to the shape of the click pin 7. If a recess for disposing the click pin 7 is formed in the inner cylinder 2, it is necessary to increase the axial lengths of the inner cylinder 2 and the outer cylinder 3 in order to avoid interference between the groove portion into which the fixing pin 91 formed in the inner cylinder 2 fits and the above-mentioned recess. Therefore, the configuration of the present embodiment in which the recess 33 is formed in the outer cylinder 3 is preferable from the viewpoint of miniaturizing the cylinder lock 10 because the recesses 33 do not interfere with the groove portion into which the fixing pin 91 formed in the inner cylinder 2 fits, and there is no need to increase the axial lengths of the inner cylinder 2 and the outer cylinder 3.

[0020] (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.

[0021] (Driver pin, tumbler pin) The driver pin 61 and the tumbler pin 62 are substantially cylindrical members that are slidably housed in the pin holes 22 and 32. The tumbler pin 62 is a pin positioned on the keyhole 21 side. One end of the driver pin 61 abuts against the tumbler pin 62, and the other end abuts against a biasing member (not shown). In Figure 2, only one set of driver pins 61 and tumbler pins 62 is shown, with some details omitted, but there are multiple sets of driver pins 61 and tumbler pins 62, which are housed in multiple sets of pin holes 22 and 32.

[0022] The driver pin 61 is biased toward the keyhole 21 by a biasing member (not shown). 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, 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, 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.

[0023] (Click pin) The click pin 7 is a member that suppresses the rotation of the inner cylinder 2 relative to the outer cylinder 3 when the rotational state of the inner cylinder 2 relative to the outer cylinder 3 is in a specific state, namely, when the unlocking key 5 can be inserted into or removed from the keyhole 21. The click pin 7 has a cylindrical shape and is positioned in the recess 33 of the outer cylinder 3. The axial direction of the cylindrical shape of the click pin 7 is aligned with the axial direction of the outer cylinder 3 and the inner cylinder 2, and is biased by a torsion spring 8, which acts as a biasing member, toward the radially inward (axial direction) of the inner cylinder 2 and the outer cylinder 3. The click pin 7 has contact portions 71 with the same diameter formed at both ends in the axial direction. The click pin 7 has a constricted portion 72 in the axial center into which the torsion spring 8 can engage. As a result, there is no need to provide a separate radial space for positioning the torsion spring 8, and therefore the diameter of the cylinder lock 10 can be reduced.

[0024] Figure 4 is a cross-sectional view AA of Figure 3, showing the case where the rotational state of the inner cylinder 2 relative to the outer cylinder 3 is in the specific state described above. In this state, a part of the contact portion 71 engages with the recess 23 formed in the inner cylinder 2, and the rotation of the inner cylinder 2 relative to the outer cylinder 3 is suppressed. Furthermore, when a part of the contact portion 71 engages with the recess 23 formed in the inner cylinder 2, a clicking sensation is transmitted to the fingers of the user who is turning the unlocking key 5. As a result, the user can recognize the position where the unlocking key 5 can be inserted and removed, and can easily maintain the rotational state of the inner cylinder 2 relative to the outer cylinder 3 in the insertion and removal position.

[0025] Because the click pin 7 has a cylindrical shape, the contact between the inner cylinder 2 and the contact portion 71 is a line contact. As a result, compared to a conventional click motion mechanism with a ball that makes point contact with the inner cylinder, the diameter of the contact portion 71 required to provide the same click sensation to the user's fingers can be smaller than that of the ball. This makes it possible to miniaturize the cylinder lock 10. The diameter of the contact portion 71 can be, for example, less than 3.5 mm, and may be 2 mm or less. Furthermore, in a conventional click motion mechanism, if the biasing force applied to the ball is strong, a part of the inner cylinder 2 will wear down with use, and as a result, the ball may get stuck in a recess formed in the inner cylinder and become unable to be removed. In contrast, the click pin 7 according to this embodiment has a cylindrical shape and a larger contact area with the inner cylinder 2 compared to a ball, so there is less risk of the click pin 7 getting stuck in the recess 23 and becoming unable to be removed. For this reason, the biasing force applied to the click pin 7 can be stronger.

[0026] A portion of the contact portion 71 of the click pin 7 engages with a recess 23 formed in the inner cylinder 2, and while the rotation of the inner cylinder 2 relative to the outer cylinder 3 is suppressed, when the user rotates the unlocking key 5, the contact portion 71 overcomes the recess 23 and comes into contact with the outer circumferential surface 20 of the inner cylinder 2. Because the click pin 7 has a cylindrical shape, when the inner cylinder 2 is rotated relative to the outer cylinder 3, the click pin 7 also rotates while coming into contact with the outer circumferential surface 20 of the inner cylinder 2. This reduces the frictional force generated between the click pin 7 and the inner cylinder 2, suppressing wear on the click pin 7 and the inner cylinder 2, and thus improving the durability of the cylinder lock 10.

[0027] The material of the click pin 7 is not particularly limited, but metal can be used. Examples of metals include stainless steel such as SUS303.

[0028] Preferably, one click pin 7 is provided in the circumferential direction of the inner cylinder 2 and the outer cylinder 3. If the inner cylinder 2 is rotatable 360 ​​degrees relative to the outer cylinder 3, then if multiple click pins 7 are placed in the circumferential direction of the inner cylinder 2 and the outer cylinder 3 (for example, two placed diagonally), a clicking sensation will be generated in multiple rotational states, which may make it difficult to determine the specific rotational state in which the unlocking key 5 can be inserted or removed. If the inner cylinder 2 is not rotatable 360 ​​degrees relative to the outer cylinder 3, then multiple click pins 7 may be provided in the circumferential direction of the inner cylinder 2 and the outer cylinder 3, as long as a clicking sensation is not generated in multiple rotational states.

[0029] (Biasing member) The torsion spring 8, acting as a biasing member, is made of an elastic material and is a linear or plate-shaped body having an arc shape. The torsion spring 8 applies a biasing force to the click pin 7 in the radially inward direction (axial direction) of the inner cylinder 2 and outer cylinder 3. As shown in Figure 4, the torsion spring 8 contacts a part of the outer circumference of the constricted portion 72 of the click pin 7. As shown in Figure 3, the torsion spring 8 is positioned in a groove 34 formed along the circumferential direction of the outer cylinder 3. By using the torsion spring 8 as a biasing member and adopting the above configuration, it is possible to reduce the diameter of the cylinder lock 10. The material of the torsion spring 8 is not particularly limited, and known materials can be used.

[0030] Both ends of the torsion spring 8 are engaged with and fixed to the outer cylinder 3. As shown in Figure 4, it is preferable that the torsion spring 8 be positioned over a distance of 180 degrees or less in the circumferential direction of the inner cylinder 2 and the outer cylinder 3. This prevents a portion of the torsion spring 8, which deforms in conjunction with the clicking action of the click pin 7, from coming into contact with a member positioned on the outer edge of the outer cylinder 3.

[0031] [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.

[0032] 《Second Embodiment》 Next, the configuration of the cylinder lock 10a according to the second embodiment of this disclosure will be described with reference to Figure 9. In the following description, components similar to those in the first embodiment will be denoted by the same reference numerals in the drawings, and their descriptions may be omitted.

[0033] Figure 9 is a cross-sectional view corresponding to Figure 4 of the first embodiment. The cylinder lock 10a includes an inner cylinder 2a, an outer cylinder 3a, a click pin 7a, and a torsion spring 8a as a biasing member.

[0034] The click pin 7a in this embodiment has a cylindrical shape, similar to the click pin 7. The click pin 7a is positioned in a recess 23a formed in the inner cylinder 2a. The click pin 7a is biased radially outward by a torsion spring 8a. The outer cylinder 3a is provided with a recess 33a into which the click pin 7a engages when the rotational state of the inner cylinder 2a relative to the outer cylinder 3a is in a specific state, that is, when the unlocking key 5 can be inserted into or removed from the keyhole 21. The configuration of the cylinder lock 10a according to the second embodiment also makes it possible to realize a click motion mechanism that allows for miniaturization of the cylinder lock.

[0035] 《Third Embodiment》 Next, the configuration of the cylinder lock 10b according to the third embodiment of this disclosure will be described with reference to Figure 10.

[0036] Figure 10 is a cross-sectional view corresponding to Figure 4 of the first embodiment. The cylinder lock 10b includes an inner cylinder 2a, an outer cylinder 3a, a click pin 7a, and a spring 8b as a biasing member.

[0037] The click pin 7b in this embodiment has a cylindrical shape, similar to the click pin 7. The click pin 7b is positioned in a recess 23b formed in the inner cylinder 2a. A spring 8b, acting as a biasing member, is positioned radially inward from the click pin 7b in the recess 23b. The click pin 7b is biased radially outward by the spring 8b. The configuration of the cylinder lock 10b according to the third embodiment also enables the realization of a click motion mechanism that allows for miniaturization of the cylinder lock.

[0038] <door> As shown in Figure 11, the door 100 according to this embodiment is installed in a door opening A of the 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. Instead of the cylinder locks 10, either the cylinder lock 10a according to the second embodiment or the cylinder lock 10b according to the third embodiment may be used.

[0039] 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.

Claims

1. It comprises an outer cylinder and an inner cylinder that rotatably fits into the outer cylinder, A cylindrical click pin is arranged in the outer cylinder. The click pin is positioned such that the axial direction of the cylindrical shape is aligned with the axial direction of the outer cylinder and the inner cylinder. The inner cylinder has a recess formed in which the click pin fits. The outer cylinder has a notch formed therein, which penetrates between the inner and outer circumferential surfaces and in which the click pin is positioned. A cylinder lock wherein the click pin suppresses the rotation of the inner cylinder relative to the outer cylinder when the rotational state of the inner cylinder relative to the outer cylinder is in a specific state.

2. The cylinder lock according to claim 1, wherein the notch is arranged to overlap with the recess of the inner cylinder when viewed from the circumferential direction.

3. The cylinder lock according to claim 1 or 2, wherein the click pin is biased in the radial direction of the outer cylinder and the inner cylinder by a biasing member and has a constricted portion that can engage with the biasing member.

4. The cylinder lock according to claim 3, wherein the biasing member is a torsion spring.

5. The outer cylinder further comprises a construction pin that is removably housed in a hole provided in the outer cylinder, The cylinder lock according to any one of claims 1 to 3, wherein the position of the construction pin and a part of the recess into which the click pin engages overlap in the circumferential direction of the inner cylinder.

6. The cylinder lock according to claim 3 or 4, wherein, when viewed from the axial direction of the inner cylinder and the outer cylinder, the outermost circumference of the biasing member is positioned radially inward from the outermost circumference of the click pin.

7. A door equipped with a cylinder lock according to any one of claims 1 to 6.

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