Cylinder lock

Abstract

To provide a cylinder lock in which an inner cylinder is freely rotatable relative to an outer cylinder, and an amount of axial misalignment between the inner cylinder and the outer cylinder can be minimized, and whose diameter can be reduced.SOLUTION: A cylinder lock includes an inner cylinder and an outer cylinder into which the inner cylinder is rotatably fitted. The inner cylinder has a fixed pin insertion groove extending circumferentially on an outer circumferential surface, and the outer cylinder has a fixed pin insertion hole that communicates with the fixed pin insertion groove at a position corresponding to the fixed pin insertion groove. Inserting a fixed pin into the fixed pin insertion hole toward the fixed pin insertion groove causes the inner cylinder to position rotatably and not removably in the axial direction with respect to the outer cylinder.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] Conventionally, a cylinder lock installed on a door of a house or the like is known. The cylinder lock includes an outer cylinder, an inner cylinder rotatably fitted in the outer cylinder, a driver pin and a tumbler pin that restrict the rotation of the inner cylinder. 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 can rotate. Thereby, the locking and unlocking of the cylinder lock are performed. The driver pin and the tumbler pin are accommodated in the hole portions formed in the outer cylinder and the inner cylinder together with a biasing member such as a spring.

[0003] The inner cylinder needs to be freely rotatable in the rotational direction with respect to the outer cylinder and cannot be removed in the axial direction. Therefore, conventionally, a flange portion that abuts against the end surface of the outer cylinder is provided at one end portion of the inner cylinder, and a retaining component is provided at the other end portion of the inner cylinder so that the inner cylinder is sandwiched from both sides in the axial direction with respect to the outer cylinder and cannot be removed in the axial direction (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Generally, the anti-loosening component is fixed to the inner cylinder by screwing or clip fixing or the like. However, when the inner cylinder and the outer cylinder are reduced in diameter in order to miniaturize the cylinder lock, in the case of screwing, there is insufficient area for tapping the screw portion, and in the case of clip fixing, the elastic deformation amount of the clip becomes small, making it difficult to achieve a shape-stable anti-loosening function. In the case of clip fixing, furthermore, since the tolerances are accumulated for each of the plate thicknesses of the inner cylinder, the outer cylinder, and the clip, the axial displacement amount (play) between the inner cylinder and the outer cylinder increases.

[0006] Therefore, an object of the present disclosure is to provide a cylinder lock in which the inner cylinder can rotate freely with respect to the outer cylinder, the axial displacement amount between the inner cylinder and the outer cylinder can be minimized, and the diameter can be reduced.

Means for Solving the Problems

[0007] The present disclosure includes an inner cylinder and an outer cylinder that rotatably fits the inner cylinder. The inner cylinder has a fixing pin insertion groove extending along the circumferential direction on the outer peripheral surface, and the outer cylinder has a fixing pin insertion hole communicating with the fixing pin insertion groove at a position corresponding to the fixing pin insertion groove. By inserting a fixing pin into the fixing pin insertion hole toward the inside of the fixing pin insertion groove, the inner cylinder is positioned with respect to the outer cylinder so as to be rotatable and axially non-removable. The present disclosure relates to a cylinder lock.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The cylinder lock 1 according to the present embodiment is used together with an unlocking key 100 that can lock and unlock the cylinder lock 1. As shown in FIGS. 2 and 3, the cylinder lock 1 includes an inner cylinder 2, an outer cylinder 3, a driver pin 41, a tumbler pin 42, a biasing member 43 composed of a spring that biases the driver pin 41 toward the tumbler pin 42, a click pin 5, and a pair of lid members 6.

[0010] Here, the directions in each figure are defined. The direction indicated by the double-headed arrows in the figure indicates the direction along the central axis J of the cylinder lock 1. This direction coincides with the axial direction of the inner cylinder 2 and the outer cylinder 3. X1 indicates the front side of the cylinder lock 1, and X2 indicates the rear side of the cylinder lock 1. For example, when the cylinder lock 1 is attached to the front door, the front side X1 is the outdoor side, and the rear side X2 is the indoor side.

[0011] As shown in FIGS. 2 and 3, the inner cylinder 2 is a substantially cylindrical member that is rotatably fitted to 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 is fitted inside the outer cylinder 3. A keyhole 21 into which the unlocking key 100 can be inserted is formed in the inner cylinder 2 along the axial direction of the inner cylinder 2.

[0012] On the outer peripheral surface 20 of the inner cylinder 2, as shown in FIGS. 2 and 3, a plurality of cylindrical pin holes 22 communicating with the keyhole 21 are formed. The pin holes 22 are holes into which at least a part of the driver pin 41 and the tumbler pin 42 can be inserted and removed. In the present embodiment, a row of pin holes is formed by arranging a plurality of pin holes 22 along the axial direction of the inner cylinder 2. A plurality of rows of pin holes are formed in the circumferential direction of the inner cylinder 2.

[0013] On the outer peripheral surface 20 at the end of the rear side X2 of the inner cylinder 2, as shown in FIGS. 2, 3, and 6, a plurality of fitting holes 23 communicating with the keyhole 21 are formed at predetermined intervals in the circumferential direction. In the present embodiment, four fitting holes 23 are formed in the outer peripheral surface 20 of the inner cylinder 2. The inner peripheral surface of the fitting hole 23 on the keyhole 21 side is formed with a small diameter. As a result, as shown in FIG. 6, an annular step portion 23a is formed on the inner peripheral surface of the fitting hole 23.

[0014] Drive pins 24 are inserted into the four fitting holes 23 respectively. As shown in FIGS. 3 and 6, the drive pin 24 has a large diameter portion 241, a small diameter portion 242, and a drive end portion 243 in order along the axial direction of the drive pin 24 from the outside in the radial direction of the inner cylinder 2. The outer diameter of the drive end portion 243 is smaller than the outer diameter of the small diameter portion 242. When the drive pin 24 is inserted into the fitting hole 23 from the outside in the radial direction of the inner cylinder 2, the large diameter portion 241 of the drive pin 24 abuts against the annular step portion 23a of the fitting hole 23, preventing further insertion toward the keyhole 21. In this state, as shown in FIGS. 4 to 6, the drive end portion 243 projects into the keyhole 21 from the fitting hole 23. The large diameter portion 241 of the drive pin 24 is completely accommodated in the fitting hole 23 and does not project radially outside the outer peripheral surface 20 of the inner cylinder 2. The drive end portions 243 of the four drive pins 24 engage with the tip of the unlocking key 100 inserted into the keyhole 21 as described later. Thereby, the four drive pins 24 rotate the inner cylinder 2 relative to the outer cylinder 3 in conjunction with the rotation operation of the unlocking key 100.

[0015] On the outer peripheral surface 20 at the end of the rear side X2 of the inner cylinder 2, as shown in FIGS. 3 and 5, a recess 25 into which a click pin 5 described later fits is formed. The recess 25 extends along the axial direction of the inner cylinder 2. The width of the recess 25 along the circumferential direction of the outer peripheral surface 20 of the inner cylinder 2 is smaller than the outer diameter of the cylindrical click pin 5 as shown in FIG. 5.

[0016] As shown in FIGS. 2 and 3, the outer cylinder 3 is a substantially cylindrical member into which the inner cylinder 2 can be fitted 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 fixedly attached to a door (not shown) to which the cylinder lock 1 is attached in a non-rotatable manner. The outer cylinder 3 fits with the inner cylinder 2 by bringing the inner peripheral surface, which is the sliding surface with the inner cylinder 2, into contact with the outer peripheral surface 20 of the inner cylinder 2. The axial length of the outer cylinder 3 is slightly shorter than the axial length of the inner cylinder 2. As a result, as shown in FIG. 6, the inner cylinder 2 fitted into the outer cylinder 3 with the positions on the front side X1 aligned projects toward the rear side X2 with respect to the outer cylinder 3. The portion of the inner cylinder 2 that projects beyond the outer cylinder 3 toward the rear side X2 is used for connection with functional components (not shown) of the cylinder lock 1.

[0017] A cylindrical hole portion 31 into which the inner cylinder 2 can be fitted is formed in the outer cylinder 3 along the axial direction of the outer cylinder 3. A plurality of cylindrical pin holes 32 communicating with the hole portion 31 are formed in the outer peripheral surface 30 of the outer cylinder 3. The pin holes 32 are holes into which at least a part of the driver pin 41 and the tumbler pin 42 can be inserted and removed. The plurality of pin holes 32 in the outer cylinder 3 are arranged so as to be communicable with the plurality of pin holes 22 in the inner cylinder 2. In the present embodiment, a row of pin holes is formed by arranging a plurality of pin holes 32 along the axial direction of the outer cylinder 3. The pin hole row is formed in a plurality of rows in the circumferential direction of the outer cylinder 3, similar to the pin hole row of the inner cylinder 2. The plurality of pin holes 22 in the inner cylinder 2 and the plurality of pin holes 32 in the outer cylinder 3 communicate with each other so that at least a part of the driver pin 41 and the tumbler pin 42 can be inserted and removed when the inner cylinder 2 is rotated with respect to the outer cylinder 3 and arranged at a predetermined position.

[0018] As shown in FIGS. 2 to 5, on the outer peripheral surface 30 of the outer cylinder 3, a lid member mounting groove 33 extending along the axial direction is provided. The lid member mounting groove 33 has a substantially rectangular shape in a cross-sectional view and opens toward the outer peripheral surface 30 of the outer cylinder 3. The lid member mounting groove 33 is formed from the end surface on the front side X1 to the end surface on the rear side X2 of the outer cylinder 3. In the present embodiment, two lid member mounting grooves 33 are provided on the outer peripheral surface 30 of the outer cylinder 3. As shown in FIGS. 4 and 5, the two lid member mounting grooves 33 are arranged at an angle of 180 degrees in the circumferential direction of the outer peripheral surface 30 of the outer cylinder 3. The two lid member mounting grooves 33 are configured such that the bent portion 62 of the lid member 6 described later can be engaged therewith.

[0019] As shown in FIGS. 3 and 5, at the end portion on the rear side X2 of the outer cylinder 3, a notch portion 34 extending along the axial direction is formed. The notch portion 34 is arranged to be communicable with the recess 25 of the inner cylinder 2. The notch portion 34 is formed by notching the outer peripheral surface 30 in a substantially rectangular parallelepiped shape in a plan view from the end surface on the rear side X2 to the front side X1 of the outer cylinder 3. The hole portion 31 communicates with the outside in the radial direction of the outer cylinder 3 through the notch portion 34. The notch width and notch length of the notch portion 34 are substantially equal to the outer diameter and the axial length of the cylindrical click pin 5.

[0020] The driver pin 41 and the tumbler pin 42 are each a substantially cylindrical member. The driver pin 41 and the tumbler pin 42 are slidably accommodated in the pin holes 22 of the inner cylinder 2 and the pin holes 32 of the outer cylinder 3 in the radial direction of the inner cylinder 2 and the outer cylinder 3. The tumbler pin 42 is a pin arranged on the keyhole 21 side in the pin holes 22, 32. The tip of the tumbler pin 42 that abuts against the unlocking key 100 has a rounded shape. One end of the driver pin 41 abuts against the tumbler pin 42, and the other end abuts against the biasing member 43. Although only one set of the driver pin 41, the tumbler pin 42, and the biasing member 43 is shown in FIGS. 2 and 3, the sets of the driver pin 41, the tumbler pin 42, and the biasing member 43 are provided corresponding to a plurality of sets of the pin holes 22, 32.

[0021] The click pin 5 is a member that suppresses the rotation of the inner cylinder 2 relative to the outer cylinder 3 when the rotation state of the inner cylinder 2 relative to the outer cylinder 3 allows the unlocking key 100 to be inserted into and removed from the keyhole 21. The click pin 5 has a cylindrical shape. The axial direction of the click pin 5 is along the axial directions of the inner cylinder 2 and the outer cylinder 3. A constricted portion 5a extending over the entire circumference is formed at the central portion in the axial direction of the click pin 5. As shown in FIG. 5, the click pin 5 is arranged to fit into the recess 25 of the inner cylinder 2 and is completely accommodated within the notch 34 of the outer cylinder 3 in a state where the inner cylinder 2 and the outer cylinder 3 are fitted together. The click pin 5 within the notch 34 does not protrude radially outward beyond the outer peripheral surface 30 of the outer cylinder 3.

[0022] The click pin 5 accommodated within the notch 34 is biased toward the inner cylinder 2 by an arcuate torsion spring 51 serving as a biasing member. The torsion spring 51 is mounted in a spring mounting groove 35 formed along the circumferential direction on the outer peripheral surface 30 at the rear end X2 of the outer cylinder 3. The two end portions 51a of the torsion spring 51 are locked in spring locking grooves 36 formed on the outer peripheral surface 30 of the outer cylinder 3. The torsion spring 51 mounted in the spring mounting groove 35 engages with the constricted portion 5a of the click pin 5 and applies a biasing force from the radially outer side of the outer cylinder 3.

[0023] In the state shown in FIG. 5, the click pin 5 within the notch 34 of the outer cylinder 3 is fitted into the recess 25 of the inner cylinder 2. At this time, the rotation of the inner cylinder 2 relative to the outer cylinder 3 is suppressed, and the click feeling when the click pin 5 fits into the recess 25 is transmitted to the finger of the user rotating the unlocking key 100. As a result, the user can recognize the position where the unlocking key 100 can be inserted and removed, and can easily maintain the rotation state of the inner cylinder 2 relative to the outer cylinder 3 at the position where it can be inserted and removed. Since the torsion spring 51 that biases the click pin 5 engages with the constricted portion 5a of the click pin 5 and is mounted in the spring mounting groove 35 of the outer cylinder 3, the outer diameter of the outer cylinder 3 does not increase, and the cylinder lock 1 can be made smaller in diameter.

[0024] The lid member 6 covers a plurality of pin holes 32 that open to the outer peripheral surface 30 by being attached along the outer peripheral surface 30 of the outer cylinder 3. The lid member 6 is attached to the outer cylinder 3 in a state of resisting the biasing force of the biasing member 43 that applies a biasing force to the driver pin 41. As a result, the driver pin 41 is accommodated in the pin hole 32, and a biasing force directed radially inward of the outer cylinder 3 is applied. By the lid member 6 covering the plurality of pin holes 32 of the outer cylinder 3, the arrangement space of the groove portion for fixing the lid member can be reduced as compared with a lid member that covers the pin holes of the driver pins for each row. Thereby, the outer diameter of the outer cylinder 3 can be reduced. As shown in FIGS. 1 and 6, the end portion on the rear side X2 of the lid member 6 does not cover the spring attachment groove 35.

[0025] In the present embodiment, two lid members 6 are provided on the outer cylinder 3. The two lid members 6 are combined to form a substantially cylindrical shape on the outer peripheral surface 30 of the outer cylinder 3. By providing a plurality of lid members 6, the assembly workability of the cylinder lock 1 can be improved as compared with the case of using a single cylindrical lid member. As the material of the lid member 6, it is preferable to use a spring steel material. Thereby, it becomes possible to bring the lid member 6 and the outer cylinder 3 into close contact without a gap. In particular, it is more preferable to use a spring steel material made of stainless steel. Specifically, SUS304CSP can be mentioned.

[0026] As shown in FIG. 7, the lid member 6 has a curved portion 61 having a shape in which a flat plate is curved along the outer peripheral surface 30 of the outer cylinder 3, and bent portions 62 formed at both ends of the curved portion 61, respectively. The curved portion 61 has a substantially semi-circular arc cross-sectional shape. The bent portions 62 are arranged at both ends in the direction having the curvature of the curved portion 61, and are bent toward the inside of the curved portion 61, respectively. The two lid members 6, 6 have the same shape and are arranged at symmetric positions about the central axis J of the cylinder lock 1.

[0027] The two lid members 6 are attached to the outer peripheral surface 30 of the outer cylinder 3 by locking their respective bent portions 62 to the two lid member attachment grooves 33, 33 formed on the outer peripheral surface 30 of the outer cylinder 3. The curved portion 61 of the lid member 6 is curved inward with a curvature slightly larger than the curvature of the outer peripheral surface 30 of the outer cylinder 3 in the state before the lid member 6 is attached to the outer cylinder 3. Therefore, when the lid member 6 is attached to the outer cylinder 3, the spring force exerted by the curved portion 61 firmly locks the bent portion 62 to the lid member attachment groove 33 and the curved portion 61 adheres closely to the outer cylinder 3.

[0028] The unlocking key 100 of the present embodiment is composed of a cylindrical rod-shaped body. As shown in FIG. 1, a plurality of engaging grooves 101 corresponding to the circumferential arrangement of the driving end portions 243 of the plurality of driving pins 24 in the key hole 21 of the inner cylinder 2 are formed at the tip of the unlocking key 100. On the outer peripheral surface of the unlocking key 100, unevenness (not shown) corresponding to the arrangement of the plurality of tumbler pins 42 provided on the cylinder lock 1 is formed. When the unlocking key 100 is inserted into the key hole 21, the plurality of engaging grooves 101 of the unlocking key 100 engage with the plurality of driving end portions 243 in the key hole 21, and the shear line between the plurality of driver pins 41 and the tumbler pins 42 coincides with the outer peripheral surface 20 of the inner cylinder 2. When the unlocking key 100 is rotated in this state, the inner cylinder 2 rotates with respect to the outer cylinder 3.

[0029] Next, the axial retaining structure between the inner cylinder 2 and the outer cylinder 3 in the cylinder lock 1 of the present embodiment will be described.

[0030] As shown in FIGS. 2, 3, and 6, a fixing pin insertion groove 26 extending along the circumferential direction is formed on the outer peripheral surface 20 of the inner cylinder 2. As shown in FIG. 6, the fixing pin insertion groove 26 is a groove having a rectangular cross section that is recessed with the same width along the axial direction from the outer peripheral surface 20 of the inner cylinder 2 toward the key hole 21. In the present embodiment, the fixing pin insertion groove 26 is disposed at the end portion on the front side X1 of the inner cylinder 2 and is formed in an annular shape by cutting the entire circumference with respect to the outer peripheral surface 20. The plurality of pin holes 22 of the inner cylinder 2 are disposed on the rear side X2 with respect to the fixing pin insertion groove 26.

[0031] As shown in FIGS. 2, 3, and 6, a cylindrical fixing pin insertion hole 37 is formed in the outer peripheral surface 30 at the end of the front side X1 of the outer cylinder 3 at a position corresponding to the fixing pin insertion groove 26 of the inner cylinder 2. The fixing pin insertion hole 37 communicates with the hole portion 31. As shown in FIGS. 1 and 6, the end of the front side X1 of the lid member 6 does not cover the fixing pin insertion hole 37.

[0032] As shown in FIG. 6, the inner diameter of the fixing pin insertion hole 37 is larger than the groove width of the fixing pin insertion groove 26 along the axial direction of the inner cylinder 2. Therefore, in a state where the inner cylinder 2 and the outer cylinder 3 are fitted together, the fixing pin insertion groove 26 and the stepped portions 26a respectively arranged on the front side X1 and the rear side X2 of the fixing pin insertion groove 26 face the inside of the fixing pin insertion hole 37. The stepped portion 26a is formed by a part of the outer peripheral surface 20 of the inner cylinder 2.

[0033] A plurality of fixing pin insertion holes 37 are formed in the outer cylinder 3. In the present embodiment, four fixing pin insertion holes 37 are formed in the outer cylinder 3. In the outer cylinder 3, two sets of fixing pin insertion holes 37 are arranged along the circumferential direction of the outer cylinder 3 with the lid member mounting groove 33 interposed therebetween, with two fixing pin insertion holes 37 as one set. As shown in FIG. 4, the angle θ at which the central axes 37a of the two fixing pin insertion holes 37 constituting one set intersect in the circumferential direction of the outer cylinder 3 is less than 180 degrees. The lower limit of this angle θ is set to an angle such that the two fixing pin insertion holes 37 do not interfere with each other, and the two inner and outer cylinder fixing pins 7 to be inserted into the respective fixing pin insertion holes 37 do not interfere with each other. The specific angle θ is not particularly limited as long as it is other than 180 degrees, and can be set to, for example, 30 degrees.

[0034] At least two of the plurality of fixing pin insertion holes 37 are capable of inserting the inner and outer cylinder fixing pins 7. In this embodiment, the inner and outer cylinder fixing pins 7 made of metal are respectively inserted into two of the fixing pin insertion holes 37 that constitute one set out of the four fixing pin insertion holes 37. As shown in FIGS. 4 and 6, the inner and outer cylinder fixing pins 7 respectively have a cylindrical small diameter portion 71, a large diameter portion 72, and a positioning end portion 73 in order along the axial direction of the inner and outer cylinder fixing pins 7 from the outside in the radial direction of the outer cylinder 3. The outer diameter of the large diameter portion 72 is less than or equal to the inner diameter of the fixing pin insertion hole 37 and larger than the groove width of the fixing pin insertion groove 26 along the axial direction of the inner cylinder 2. The outer diameter of the positioning end portion 73 is smaller than the outer diameter of the large diameter portion 72 and less than or equal to the groove width of the fixing pin insertion groove 26 along the axial direction of the inner cylinder 2. The inner and outer cylinder fixing pins 7 referred to in this embodiment are fixing pins for restricting and fixing the axial movement of the inner cylinder 2 so that the inner cylinder 2 does not come out of the outer cylinder 3 in the axial direction.

[0035] The axial length of the inner and outer cylinder fixing pins 7 is larger than the axial length of the fixing pin insertion holes 37. Specifically, the combined length of the small diameter portion 71 and the large diameter portion 72 in the axial direction of the inner and outer cylinder fixing pins 7 is shorter than the axial length of the fixing pin insertion holes 37. The length of the positioning end portion 73 in the axial direction of the inner and outer cylinder fixing pins 7 is less than or equal to the depth of the fixing pin insertion groove 26 of the inner cylinder 2.

[0036] When the inner and outer cylinder fixing pins 7 are inserted into the fixing pin insertion holes 37 from the outside in the radial direction of the outer cylinder 3 with the positioning end portion 73 at the front, the large diameter portion 72 of the inner and outer cylinder fixing pins 7 abuts against the stepped portion 26a facing the inside of the fixing pin insertion holes 37, and further insertion is blocked. In this state, as shown in FIGS. 4 and 6, the positioning end portion 73 of the inner and outer cylinder fixing pins 7 penetrates the fixing pin insertion holes 37 of the outer cylinder 3 and is inserted into the fixing pin insertion groove 26 of the inner cylinder 2. Thereby, the inner cylinder 2 is fitted into the hole portion 31 of the outer cylinder 3 in a state where it is positioned axially so as not to come out of the outer cylinder 3. The positioning end portion 73 of the inner and outer cylinder fixing pins 7 is movable in the circumferential direction within the fixing pin insertion groove 26 of the inner cylinder 2. Therefore, when the cylinder lock 1 is in the unlocked state by inserting the unlocking key 100 into the key hole 21, the inner cylinder 2 can rotate freely with respect to the outer cylinder 3.

[0037] Since the inner cylinder 2 is positioned axially so as not to come out by the inner and outer cylinder fixing pins 7 inserted from the outside in the radial direction of the outer cylinder 3, it is not necessary to sandwich the outer cylinder 3 with the inner cylinder 2 from both sides in the axial direction as in the prior art. Since the axial lengths of the inner cylinder 2 and the outer cylinder 3 can be made as short as possible, the cylinder lock 1 can be miniaturized.

[0038] The tolerance relationship in the state where the inner cylinder 2 and the outer cylinder 3 are fitted together in this way is the groove width of the fixing pin insertion groove 26 formed in the inner cylinder 2, the inner diameter of the hole portion 31 of the outer cylinder 3, and the outer diameter of the inner and outer cylinder fixing pins 7. Among these, except for the inner diameter of the hole portion 31 of the outer cylinder 3, the others are outer peripheral processing by a machine tool that cuts the fixing pin insertion groove 26 and the inner and outer cylinder fixing pins 7, so high-precision processing can be achieved. Therefore, the amount of axial displacement between the inner cylinder 2 and the outer cylinder 3 can be minimized. Since the gap between the inner cylinder 2 and the outer cylinder 3 can be reduced, the cylinder lock 1 can be made smaller in diameter.

[0039] As shown in FIGS. 2 to 4 and FIG. 6, the two inner and outer cylinder fixing pins 7 inserted into the two fixing pin insertion holes 37 are pressed by the pressing member 8 from the outside in the radial direction of the outer cylinder 3. Thereby, it is possible to prevent the inner and outer cylinder fixing pins 7 from coming out of the outer cylinder 3 due to their own weight. The pressing member 8 of the present embodiment is an arc-shaped spring member formed by bending a rod-shaped body made of a metal having spring elasticity along the circumferential direction of the outer cylinder 3. Locking portions 8a bent in the same direction are formed at both ends of the pressing member 8, respectively. The pressing member 8 is housed in a housing groove 38 formed along the circumferential direction on the outer peripheral surface 30 at the front end X1 of the outer cylinder 3. The housing groove 38 is formed over the entire circumference of the outer cylinder 3 and crosses the two fixing pin insertion holes 37.

[0040] On the outer peripheral surface 30 of the outer cylinder 3, two retainer member locking grooves 331 are formed at intervals in the circumferential direction. The two retainer member locking grooves 331 are recessed in the outer peripheral surface 30 at the front end X1 of the outer cylinder 3 so as to open toward the outside in the radial direction and the front side X1 of the outer cylinder 3. The retainer member locking grooves 331 are arranged at positions shifted to the side closer to the two fixing pin insertion holes 37 into which the two inner and outer cylinder fixing pins 7 are inserted, with respect to the lid material mounting groove 33. The two retainer member locking grooves 331 communicate with the lid material mounting groove 33 in the circumferential direction on the outer peripheral surface 30 of the outer cylinder 3, respectively.

[0041] The length between the two locking portions 8a along the arc shape of the retainer member 8 is slightly smaller than the distance between the two retainer member locking grooves 331 along the circumferential direction of the outer cylinder 3. Therefore, the retainer member 8 is elastically mounted along the circumferential direction of the outer cylinder 3 in the accommodation groove 38 by fitting the locking portions 8a into the retainer member locking grooves 331, respectively.

[0042] The retainer member 8 mounted in the accommodation groove 38 is arranged so as to cross the end faces of the small diameter portions 71 of the two inner and outer cylinder fixing pins 7 in the accommodation groove 38. Thereby, the two inner and outer cylinder fixing pins 7 are pressed from the outside in the radial direction of the outer cylinder 3 so as not to come out of the fixing pin insertion holes 37, respectively. The end faces of the small diameter portions 71 of the inner and outer cylinder fixing pins 7 inserted into the fixing pin insertion holes 37 are arranged at positions retracted radially inward by a distance of at least the outer diameter of the rod-shaped body forming the retainer member 8 with respect to the outer peripheral surface 30 of the outer cylinder 3, as shown in FIGS. 4 and 6. The depth of the accommodation groove 38 is at least the outer diameter of the rod-shaped body forming the retainer member 8 or more. Thereby, even if the two inner and outer cylinder fixing pins 7 are pressed from the outside in the radial direction of the outer cylinder 3 by the retainer member 8, the outer diameter of the outer cylinder 3 does not increase, and the reduction in the small diameter of the cylinder lock 1 is not hindered.

[0043] The pressing member 8 only presses the inner and outer cylinder fixing pin 7 to such an extent that the inner and outer cylinder fixing pin 7 does not come out of the fixing pin insertion hole 37, and does not substantially apply a biasing force to the inner and outer cylinder fixing pin 7 toward the inner cylinder 2. Since the inner and outer cylinder fixing pin 7 does not press the inner cylinder 2, it does not become a resistance when the inner cylinder 2 rotates with respect to the outer cylinder 3. Therefore, the inner cylinder 2 can rotate smoothly with respect to the outer cylinder 3.

[0044] Since the central axes 37a of the two fixing pin insertion holes 37 intersect at an angle θ of less than 180 degrees, the central axes 7a of the two inner and outer cylinder fixing pins 7 inserted into the two fixing pin insertion holes 37 also intersect at an angle θ of less than 180 degrees. As a result, the inner cylinder 2 does not rattle in the direction of rotation about the central axis 7a of the inner and outer cylinder fixing pin 7 with respect to the outer cylinder 3.

[0045] The axial positioning and prevention of disengagement between the inner cylinder 2 and the outer cylinder 3 are completed simply by inserting the inner and outer cylinder fixing pin 7 into the fixing pin insertion hole 37 from the outside in the radial direction of the outer cylinder 3 and pressing it with the pressing member 8. Therefore, the fitting operation between the inner cylinder 2 and the outer cylinder 3 can be easily performed. Since the fixing pin insertion hole 37 is not covered by the lid member 6, the positioning state between the inner cylinder 2 and the outer cylinder 3 can be easily released simply by removing the pressing member 8 from the outer cylinder 3 and pulling out the inner and outer cylinder fixing pin 7 from the fixing pin insertion hole 37. The inner and outer cylinder fixing pin 7 can be easily pulled out by pinching the small diameter portion 71 using a jig such as pliers.

[0046] In the above embodiment, the inner and outer cylinder fixing pins 7 are respectively inserted using two fixing pin insertion holes 37 that constitute one set of the four fixing pin insertion holes 37 formed in the outer cylinder 3. However, as long as the arrangement of the two inner and outer cylinder fixing pins 7 is not arranged at an angle of 180 degrees in the circumferential direction of the outer cylinder 3, the two inner and outer cylinder fixing pins 7 may be inserted into any two of the four fixing pin insertion holes 37. The fixing pin insertion hole 37 may be inserted into all of the four fixing pin insertion holes 37.

[0047] The cylinder lock 1 of the present embodiment has the following effects.

[0048] (1) The cylinder lock 1 includes an inner cylinder 2 and an outer cylinder 3 that rotatably fits the inner cylinder 2. The inner cylinder 2 has a fixed pin insertion groove 26 extending along the circumferential direction on the outer peripheral surface 20. The outer cylinder 3 has a fixed pin insertion hole 37 communicating with the fixed pin insertion groove 26 at a position corresponding to the fixed pin insertion groove 26. By inserting the inner and outer cylinder fixed pin 7 into the fixed pin insertion hole 37 and toward the inside of the fixed pin insertion groove 26, the inner cylinder 2 is positioned relative to the outer cylinder 3 so as to be rotatable and non-removable in the axial direction.

[0049] According to this, the inner cylinder 2 can rotate freely with respect to the outer cylinder 3, and the amount of axial displacement between the inner cylinder 2 and the outer cylinder 3 can be minimized, and a cylinder lock 1 that can be reduced in diameter can be provided.

[0050] (2) In the cylinder lock 1 described in (1) above, the outer cylinder 3 has a pressing member 8 that presses the inner and outer cylinder fixed pin 7 inserted into the fixed pin insertion hole 37 from the outside in the radial direction.

[0051] According to this, the inner and outer cylinder fixed pin 7 will not come out of the fixed pin insertion hole 37 due to its own weight. Since the pressing member 8 only presses the inner and outer cylinder fixed pin 7 from the outside in the radial direction, the inner and outer cylinder fixed pin 7 does not press the inner cylinder 2, and there is no resistance when the inner cylinder 2 rotates with respect to the outer cylinder 3. Therefore, the inner cylinder 2 can rotate smoothly with respect to the outer cylinder 3.

[0052] (3) In the cylinder lock 1 described in (2) above, the pressing member 8 is elastically mounted on the outer peripheral surface 30 of the outer cylinder 3 along the circumferential direction.

[0053] According to this, since the attachment and detachment of the pressing member 8 to and from the outer cylinder 3 can be easily performed, the inner and outer cylinder fixed pin 7 can be easily removed. Therefore, the positioning state between the inner cylinder 2 and the outer cylinder 3 can be easily released.

[0054] (4) In the cylinder lock 1 described in (3) above, a housing groove 38 for housing the pressing member 8 is formed on the outer peripheral surface 30 of the outer cylinder 3 along the circumferential direction.

[0055] According to this, even if the pressing member 8 is attached, the outer diameter of the outer cylinder 3 does not increase, so the reduction of the diameter of the cylinder lock 1 is not hindered.

[0056] (5) In the cylinder lock 1 described in any one of (1) to (4) above, a plurality of fixing pin insertion holes 37 and inner and outer cylinder fixing pins 7 are provided.

[0057] According to this, the inner cylinder 2 can be positioned more stably rotatable with respect to the outer cylinder 3 and cannot be pulled out in the axial direction.

[0058] (6) In the cylinder lock 1 described in (5) above, the angle θ at which the central axes 37a, 7a of at least two inner and outer cylinder fixing pins 7 inserted into at least two fixing pin insertion holes 37 intersect in the circumferential direction of the outer cylinder 3 is less than 180 degrees.

[0059] According to this, the inner cylinder 2 is prevented from rattling in the direction of rotation about the central axis 7a of the inner and outer cylinder fixing pin 7 with respect to the outer cylinder 3. Therefore, the inner cylinder 2 can rotate more smoothly.

[0060] FIG. 8 shows a door 200 which is a fitting provided with the cylinder lock 1 shown in the present embodiment. The door 200 is openably housed in a door opening 300 of a building body. The door 200 has, on the door leading end side, a handle 201 for opening and closing the door 200 and a pair of cylinder locks 1 respectively arranged above and below the handle 201. The door 200 is used, for example, as an entrance door.

[0061] In this embodiment, an entrance door is shown as an example of a fitting on which the cylinder lock 1 is mounted. However, the present invention is not limited to the entrance door and can be applied to any door or gate that requires security, for example, a side door, a terrace door, a gate, an interior door, a shutter, etc. Further, as long as the cylinder lock 1 can be applied, it can be applied not only to fittings but also to other objects, for example, a delivery box, a locker, a safe, a refrigerator. The present disclosure includes the cylinder lock and the fitting described in the following aspects.

[0062] <Aspect 1> Comprising an inner cylinder and an outer cylinder rotatably fitted to the inner cylinder. The inner cylinder has a fixing pin insertion groove extending along the circumferential direction on the outer peripheral surface. The outer cylinder has a fixing pin insertion hole communicating with the fixing pin insertion groove at a position corresponding to the fixing pin insertion groove. A cylinder lock in which a fixing pin is inserted into the fixing pin insertion hole toward the fixing pin insertion groove, whereby the inner cylinder is positioned rotatably and non-removable in the axial direction with respect to the outer cylinder.

[0063] <Aspect 2> The cylinder lock according to Aspect 1, wherein the outer cylinder has a pressing member that presses the fixing pin inserted into the fixing pin insertion hole from the outside in the radial direction.

[0064] <Aspect 3> The cylinder lock according to Aspect 2, wherein the pressing member is elastically mounted along the circumferential direction on the outer peripheral surface of the outer cylinder.

[0065] <Aspect 4> The cylinder lock according to Aspect 2 or 3, wherein a housing groove for housing the pressing member is formed along the circumferential direction on the outer peripheral surface of the outer cylinder.

[0066] <Aspect 5> The cylinder lock according to any one of Aspects 1 to 4, wherein a plurality of the fixing pin insertion holes and the fixing pins are provided.

[0067] <Aspect 6> The angle at which the central axis of each of at least two of the fixing pins inserted into at least two of the fixing pin insertion holes intersects the circumferential direction of the outer cylinder is less than 180 degrees. The cylinder lock according to aspect 5.

[0068] <Aspect 7> A fitting including the cylinder lock according to any one of aspects 1 to 6.

Explanation of reference numerals

[0069] 1 Cylinder lock, 2 Inner cylinder, 3 Outer cylinder, 7 Inner and outer cylinder fixing pin, 7a Central axis of the inner and outer cylinder fixing pin, 8 Pressing member, 20 Outer peripheral surface of the inner cylinder, 26 Fixing pin insertion groove, 30 Outer peripheral surface of the outer cylinder, 37 Fixing pin insertion hole, 37a Central axis of the fixing pin insertion hole, 38 Accommodation groove, 100 Door

Claims

1. comprising an inner cylinder and an outer cylinder rotatably fitted around the inner cylinder, wherein the inner cylinder has a fixing pin insertion groove extending along the circumferential direction on its outer peripheral surface, the outer cylinder has a fixing pin insertion hole communicating with the fixing pin insertion groove at a position corresponding to the fixing pin insertion groove, a cylinder lock in which a fixing pin is inserted into the fixing pin insertion hole toward the fixing pin insertion groove, whereby the inner cylinder is positioned rotatably and non-removable in the axial direction with respect to the outer cylinder.

2. The cylinder lock according to claim 1, wherein the outer cylinder has a pressing member for pressing the fixing pin inserted into the fixing pin insertion hole from the outside in the radial direction.

3. The cylinder lock according to claim 2, wherein the pressing member is elastically mounted along the circumferential direction on the outer peripheral surface of the outer cylinder.

4. The cylinder lock according to claim 3, wherein a receiving groove for receiving the pressing member is formed along the circumferential direction on the outer peripheral surface of the outer cylinder.

5. The cylinder lock according to any one of claims 1 to 4, wherein a plurality of the fixing pin insertion holes and the fixing pins are provided.

6. The cylinder lock according to claim 5, wherein an angle at which central axes of at least two of the fixing pins inserted into at least two of the fixing pin insertion holes intersect in the circumferential direction of the outer cylinder is less than 180 degrees.

7. A fitting comprising the cylinder lock according to claim 1 or 2.

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