Cylinder lock and fitting

Abstract

Provided is a cylinder lock in which an inner cylinder can freely rotate with respect to an outer cylinder and a deviation amount in an axial direction between the inner cylinder and the outer cylinder can be minimized, and which allows for a reduced diameter. This cylinder lock comprises an inner cylinder and an outer cylinder rotatably fitting with the inner cylinder. The inner cylinder has a fixed pin insertion groove extending along a circumferential direction on an outer circumferential surface. The outer cylinder has a fixed pin insertion hole communicating with the fixed pin insertion groove at a position corresponding to the fixed pin insertion groove. As the fixed pin is inserted into the fixed pin insertion hole toward the fixed pin insertion groove, the inner cylinder is positioned with respect to the outer cylinder rotatably and so as not to fall out in the axial direction.

Description

Cylinder locks and fittings

[0001] The present disclosure relates to cylinder locks and fittings.

[0002] Conventionally, cylinder locks installed on doors of houses and the like have been known. A cylinder lock has an outer cylinder, an inner cylinder that rotatably fits into the outer cylinder, and a driver pin and a tumbler pin that restrict the rotation of the inner cylinder. An unlocking key corresponding to the cylinder lock has a concave or convex portion formed at the contact portion with the tumbler pin. By inserting the unlocking key into the keyhole of the cylinder lock and aligning the contact surfaces between the driver pin and the tumbler pin with the sheer line, which is the outer peripheral surface of the inner cylinder, the inner cylinder becomes rotatable. This allows the cylinder lock to be locked and unlocked. The driver pin and the tumbler pin are housed in holes formed in the outer and inner cylinders, along with a biasing member such as a spring.

[0003] The inner cylinder must be able to rotate freely relative to the outer cylinder in the rotational direction, but must not slip out in the axial direction. Therefore, conventionally, a flange that abuts against the end face of the outer cylinder is provided at one end of the inner cylinder, and a retaining part is provided at the other end of the inner cylinder. This clamps the outer cylinder from both sides in the axial direction to prevent the inner cylinder from slipping out of the outer cylinder in the axial direction (see, for example, Patent Document 1).

[0004] Japanese Patent Application Laid-Open No. 2002-121939

[0005] Generally, the retaining parts are fixed to the inner cylinder by screw fastening or clip fastening. However, when the diameters of the inner and outer cylinders are reduced to miniaturize the cylinder lock, the area for tapping the threads is insufficient in the case of screw fastening. In the case of clip fastening, the amount of elastic deformation of the clip is reduced. As a result, it becomes difficult to achieve a stable retaining function in terms of shape. In the case of clip fastening, the tolerances for the thicknesses of the inner cylinder, outer cylinder, and clip are accumulated, resulting in a large amount of axial misalignment (play) between the inner and outer cylinders.

[0006] Therefore, the objective of the present disclosure is to provide a cylinder lock and a fixture equipped with the same, in which the inner tube can rotate freely relative to the outer tube, the amount of axial misalignment between the inner tube and the outer tube can be minimized, and the diameter can be reduced.

[0007] The present disclosure relates to a cylinder lock comprising an inner tube and an outer tube into which the inner tube is rotatably fitted, wherein the inner tube has a fixing pin insertion groove extending circumferentially on its outer peripheral surface, and the outer tube has a fixing pin insertion hole communicating with the fixing pin insertion groove at a position corresponding to the fixing pin insertion groove, and wherein a fixing pin is inserted into the fixing pin insertion hole toward the fixing pin insertion groove, thereby positioning the inner tube relative to the outer tube so that it is rotatable and cannot be removed axially.

[0008] FIG. 4 is a perspective view showing a cylinder lock and an unlocking key according to the present embodiment. FIG. 5 is an exploded perspective view of the cylinder lock according to the present embodiment. FIG. 6 is an exploded perspective view of the cylinder lock according to the present embodiment, viewed from a direction different from that of FIG. 2. FIG. 7 is a front view of the cylinder lock according to the present embodiment, viewed from the outside of the room. FIG. 8 is a back view of the cylinder lock according to the present embodiment, viewed from the inside of the room. FIG. 9 is a cross-sectional view taken along line A-A in FIG. 4. FIG. 10 is a front view of a cover member provided in the cylinder lock according to the present embodiment. FIG. 11 is a front view of a door equipped with the cylinder lock according to the present embodiment.

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

[0010] Here, the directions in each figure will be defined. The direction indicated by the double-headed arrow 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, if the cylinder lock 1 is attached to a front door, the front side X1 is the outside side of the front door, and the rear side X2 is the inside side of the front door.

[0011] 2 and 3, the inner cylinder 2 is a substantially cylindrical member that rotatably fits into the outer cylinder 3. The material of the inner cylinder 2 is not particularly limited, but it is made of a metal such as brass, for example. The inner cylinder 2 fits inside the outer cylinder 3. A keyhole 21 is formed in the inner cylinder 2 along the axial direction of the inner cylinder 2, into which the unlocking key 100 can be inserted.

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

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

[0014] A drive pin 24 is inserted into each of the four fitting holes 23. As shown in FIGS. 3 and 6 , the drive pin 24 has a large-diameter portion 241, a small-diameter portion 242, and a driving end portion 243, which are arranged in this order along the axial direction of the drive pin 24 from the radial outside of the inner cylinder 2. The outer diameter of the driving 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 radial outside 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 into the keyhole 21. In this state, the driving end portion 243 is positioned so as to protrude from the fitting hole 23 into the keyhole 21, as shown in FIGS. 4 to 6 . The large-diameter portion 241 of the drive pin 24 is completely housed within the fitting hole 23 and does not protrude radially outward beyond the outer circumferential surface 20 of the inner cylinder 2. As will be described later, the drive ends 243 of the four drive pins 24 engage with the tip of the unlocking key 100 inserted into the keyhole 21. As a result, the four drive pins 24 rotate the inner cylinder 2 relative to the outer cylinder 3 in conjunction with the rotation of the unlocking key 100.

[0015] 3 and 5, a recess 25 into which a click pin 5, which will be described later, fits is formed on the outer peripheral surface 20 at the end on the rear side X2 of the inner cylinder 2. 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.

[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. The material of the outer cylinder 3 is not particularly limited, but, like the inner cylinder 2, it may be made of a metal such as brass. The outer cylinder 3 is fixed to a door (not shown) to which the cylinder lock 1 is attached so as not to rotate. The outer cylinder 3 is fitted to the inner cylinder 2 by abutting its inner circumferential surface, which is the sliding surface with the inner cylinder 2, against the outer circumferential 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 to the outer cylinder 3 with the front side X1 aligned, protrudes toward the rear side X2 beyond the outer cylinder 3. The portion of the inner cylinder 2 protruding toward the rear side X2 beyond the outer cylinder 3 is used for connection to functional components (not shown) of the cylinder lock 1.

[0017] The outer tube 3 has a cylindrical hole 31 formed along the axial direction of the outer tube 3, into which the inner tube 2 can be fitted. A plurality of cylindrical pin holes 32 communicating with the hole 31 are formed in the outer peripheral surface 30 of the outer tube 3. The pin holes 32 are holes into which at least a portion of the driver pin 41 and the tumbler pins 42 can be inserted and removed. The plurality of pin holes 32 in the outer tube 3 are arranged to be able to communicate with the plurality of pin holes 22 in the inner tube 2. In this embodiment, a single row of pin holes is formed by arranging the plurality of pin holes 32 along the axial direction of the outer tube 3. Similar to the pin hole row in the inner tube 2, multiple rows of pin hole rows are formed in the circumferential direction of the outer tube 3. The plurality of pin holes 22 in the inner tube 2 and the plurality of pin holes 32 in the outer tube 3 are able to communicate with each other so that at least a portion of the driver pin 41 and the tumbler pins 42 can be inserted and removed when the inner tube 2 is rotated relative to the outer tube 3 and positioned at a predetermined position.

[0018] As shown in Figures 2 to 5, a lid material mounting groove 33 is provided in the outer peripheral surface 30 of the outer cylinder 3 along the axial direction. The lid material mounting groove 33 has a substantially rectangular shape in cross section and opens toward the outer peripheral surface 30 of the outer cylinder 3. The lid material mounting groove 33 is formed from the end face of the outer cylinder 3 on the front side X1 to the end face of the outer cylinder 3 on the rear side X2. In this embodiment, two lid material mounting grooves 33 are provided in the outer peripheral surface 30 of the outer cylinder 3. As shown in Figures 4 and 5, the two lid material mounting grooves 33 are arranged 180 degrees apart in the circumferential direction of the outer peripheral surface 30 of the outer cylinder 3. The two lid material mounting grooves 33 are configured to be engageable with a bent portion 62 of the lid material 6, which will be described later.

[0019] 3 and 5, a notch 34 is formed along the axial direction at the end of the rear side X2 of the outer tube 3. The notch 34 is arranged to be able to communicate with the recess 25 of the inner tube 2. The notch 34 is formed by cutting out the outer peripheral surface 30 from the end face of the rear side X2 of the outer tube 3 toward the front side X1 so as to have a substantially rectangular parallelepiped shape in a plan view. The hole 31 communicates with the radial outside of the outer tube 3 via the notch 34. The notch width and length of the notch 34 are substantially equal to the outer diameter and 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 respectively received in the pin hole 22 of the inner cylinder 2 and the pin hole 32 of the outer cylinder 3 so as to be slidable in the radial direction of the inner cylinder 2 and the outer cylinder 3. The tumbler pin 42 is located on the keyhole 21 side of the pin holes 22 and 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 , sets of the driver pin 41, the tumbler pin 42, and the biasing member 43 are provided corresponding to multiple sets of the pin holes 22 and 32.

[0021] The click pin 5 is a member that suppresses rotation of the inner tube 2 relative to the outer tube 3 when the rotational state of the inner tube 2 relative to the outer tube 3 is such that the unlocking key 100 can be inserted and removed from the keyhole 21. The click pin 5 is cylindrical. The axial direction of the click pin 5 is aligned with the axial directions of the inner tube 2 and the outer tube 3. A constricted portion 5a is formed around the entire circumference at the center of the axial direction of the click pin 5. As shown in FIG. 5 , when the inner tube 2 and the outer tube 3 are fitted together, the click pin 5 is positioned to fit into the recess 25 of the inner tube 2 and is completely housed within the cutout portion 34 of the outer tube 3. The click pin 5 within the cutout portion 34 does not protrude radially outward beyond the outer circumferential surface 30 of the outer tube 3.

[0022] The click pin 5 housed in the cutout portion 34 is urged toward the inner cylinder 2 by an arc-shaped torsion spring 51 serving as a urging member. The torsion spring 51 is attached to a spring mounting groove 35 formed along the circumferential direction on the outer peripheral surface 30 at the end of the rear side X2 of the outer cylinder 3. Two ends 51 a of the torsion spring 51 are engaged with spring locking grooves 36 formed on the outer peripheral surface 30 of the outer cylinder 3. The torsion spring 51 attached to the spring mounting groove 35 engages with the narrowed portion 5 a of the click pin 5 and applies a urging force from the radially outside of the outer cylinder 3.

[0023] 5, the click pin 5 in the cutout portion 34 of the outer cylinder 3 is fitted into the recess 25 of the inner cylinder 2. At this time, rotation of the inner cylinder 2 relative to the outer cylinder 3 is restricted, and the clicking sensation when the click pin 5 fits into the recess 25 is transmitted to the fingers of the user who is rotating the unlocking key 100. This allows the user to recognize the position at which the unlocking key 100 can be inserted or removed, and allows the user to easily maintain the rotated state of the inner cylinder 2 relative to the outer cylinder 3 in the insertable / removable position. The torsion spring 51 that biases the click pin 5 engages with the constricted portion 5a of the click pin 5 and is attached to the spring mounting groove 35 of the outer cylinder 3. Therefore, the outer diameter of the outer cylinder 3 does not increase, and the diameter of the cylinder lock 1 can be reduced.

[0024] The lid member 6 is attached along the outer peripheral surface 30 of the outer tube 3, thereby covering the multiple pin holes 32 opening in the outer peripheral surface 30. The lid member 6 is attached to the outer tube 3 while resisting the biasing force of the biasing member 43, which applies a biasing force to the driver pin 41. As a result, the driver pin 41 is accommodated in the pin hole 32 and is subjected to a biasing force toward the radially inward direction of the outer tube 3. By having the lid member 6 cover the multiple pin holes 32 of the outer tube 3, the arrangement space for the grooves for fixing the lid member can be reduced compared to a lid member that covers each row of the driver pin holes. This allows the diameter of the outer tube 3 to be reduced. As shown in FIGS. 1 and 6 , the rear side X2 end of the lid member 6 does not cover the spring mounting groove 35.

[0025] In this 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 multiple lid members 6, the assembly workability of the cylinder lock 1 can be improved compared to when a single cylindrical lid member is used. Spring steel is preferably used as the material for the lid members 6. This makes it possible to tightly seal the lid members 6 and the outer cylinder 3 without any gaps. In particular, it is more preferable to use stainless steel spring steel. Specifically, SUS304CSP can be used.

[0026] As shown in Fig. 7, the cover material 6 has a curved portion 61 having a shape obtained by curving a flat plate along the outer peripheral surface 30 of the outer cylinder 3, and bent portions 62 formed at both ends of the curved portion 61. The curved portion 61 has a substantially semicircular cross-sectional shape. The bent portions 62 are arranged at both ends of the curved portion 61 in the direction of curvature, and are each bent toward the inside of the curved portion 61. The two cover materials 6, 6 have the same shape and are arranged in positions symmetrical about the central axis J of the cylinder lock 1.

[0027] The two lid materials 6 are attached to the outer peripheral surface 30 of the outer cylinder 3 by engaging their respective bent portions 62 with two lid material attachment grooves 33, 33 formed on the outer peripheral surface 30 of the outer cylinder 3. Before the lid materials 6 are attached to the outer cylinder 3, the curved portions 61 of the lid materials 6 are curved inward with a curvature slightly larger than the curvature of the outer peripheral surface 30 of the outer cylinder 3. Therefore, when the lid materials 6 are attached to the outer cylinder 3, the spring force exerted by the curved portions 61 causes the bent portions 62 to be firmly engaged with the lid material attachment grooves 33 and the curved portions 61 to be in close contact with the outer cylinder 3.

[0028] The unlocking key 100 of this embodiment is a cylindrical rod-shaped body. As shown in FIG. 1 , the tip of the unlocking key 100 is formed with multiple engagement grooves 101 that correspond to the circumferential arrangement of the drive ends 243 of the multiple drive pins 24 in the keyway 21 of the inner cylinder 2. The outer peripheral surface of the unlocking key 100 is formed with unevenness (not shown) that corresponds to the arrangement of the multiple tumbler pins 42 provided in the cylinder lock 1. When the unlocking key 100 is inserted into the keyway 21, the multiple engagement grooves 101 of the unlocking key 100 engage with the multiple drive ends 243 in the keyway 21, and the sheer line between the multiple 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 relative to the outer cylinder 3.

[0029] Next, a description will be given of the axial retaining structure of the inner cylinder 2 and the outer cylinder 3 in the cylinder lock 1 of this embodiment.

[0030] 2, 3, and 6, a fixing pin insertion groove 26 extending in the circumferential direction is formed in the outer peripheral surface 20 of the inner cylinder 2. As shown in Fig. 6, the fixing pin insertion groove 26 is a groove with a rectangular cross section that is recessed in the axial direction with the same width from the outer peripheral surface 20 of the inner cylinder 2 toward the keyhole 21. In this embodiment, the fixing pin insertion groove 26 is located at the end of the front side X1 of the inner cylinder 2, and is formed in an annular shape by cutting the outer peripheral surface 20 around the entire circumference. The multiple pin holes 22 in the inner cylinder 2 are located on the rear side X2 of the fixing pin insertion groove 26.

[0031] 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] 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, when the inner cylinder 2 and the outer cylinder 3 are fitted together, the fixing pin insertion groove 26 and the step portions 26a located on the front side X1 and rear side X2 of the fixing pin insertion groove 26 face into the fixing pin insertion hole 37. The step portions 26a are formed by 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 this embodiment, four fixing pin insertion holes 37 are formed in the outer cylinder 3. Two sets of fixing pin insertion holes 37, each consisting of two fixing pin insertion holes 37, are arranged along the circumferential direction of the outer cylinder 3, with the lid mounting groove 33 sandwiched between them. 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 with 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 at which the two fixing pin insertion holes 37 do not interfere with each other and the two inner and outer cylinder fixing pins 7 (described later) inserted into each fixing pin insertion hole 37 do not interfere with each other. The specific angle θ is not particularly limited as long as it is other than 180 degrees, but it can be set to, for example, 30 degrees.

[0034] At least two of the multiple fixation pin insertion holes 37 can accommodate inner / outer cylinder fixation pins 7. In this embodiment, two of the four fixation pin insertion holes 37 that make up one set are each fitted with a metal inner / outer cylinder fixation pin 7. As shown in FIGS. 4 and 6 , the inner / outer cylinder fixation pin 7 has a cylindrical small-diameter portion 71, a large-diameter portion 72, and a positioning end portion 73, arranged in this order from the radial outside of the outer cylinder 3 along the axial direction of the inner / outer cylinder fixation pin 7. The outer diameter of the large-diameter portion 72 is equal to or smaller than the inner diameter of the fixation pin insertion hole 37 and is larger than the groove width of the fixation 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 is equal to or smaller than the groove width of the fixation pin insertion groove 26 along the axial direction of the inner cylinder 2. The inner / outer cylinder fixing pin 7 in this embodiment is a fixing pin that restricts the axial movement of the inner cylinder 2 so that the inner cylinder 2 does not slip out of the outer cylinder 3 in the axial direction, and fixes it.

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

[0036] When the inner / outer cylinder fixing pin 7 is inserted into the fixing pin insertion hole 37 from the radial outside of the outer cylinder 3, with the positioning end 73 leading, the large-diameter portion 72 of the inner / outer cylinder fixing pin 7 abuts against the step 26a facing the fixing pin insertion hole 37, preventing further insertion. In this state, the positioning end 73 of the inner / outer cylinder fixing pin 7 passes through the fixing pin insertion hole 37 of the outer cylinder 3 and is inserted into the fixing pin insertion groove 26 of the inner cylinder 2, as shown in Figures 4 and 6. As a result, the inner cylinder 2 is positioned relative to the outer cylinder 3 so that it cannot slip out in the axial direction and fits into the hole 31 of the outer cylinder 3. The positioning end 73 of the inner / outer cylinder fixing pin 7 can move circumferentially within the fixing pin insertion groove 26 of the inner cylinder 2. Therefore, when the cylinder lock 1 is unlocked by inserting the unlocking key 100 into the keyway 21, the inner cylinder 2 can freely rotate relative to the outer cylinder 3.

[0037] The inner cylinder 2 is positioned so that it cannot slip out in the axial direction by the inner / outer cylinder fixing pin 7, which is inserted from the radial outside of the outer cylinder 3, so there is no need to sandwich the outer cylinder 3 from both sides in the axial direction by the inner cylinder 2 as in the conventional case. Since the axial lengths of the inner cylinder 2 and outer cylinder 3 can be made as short as possible, the cylinder lock 1 can be made smaller.

[0038] When the inner cylinder 2 and outer cylinder 3 are fitted together in this way, there are three tolerance relationships: the groove width of the fixing pin insertion groove 26 formed in the inner cylinder 2, the inner diameter of the hole 31 in the outer cylinder 3, and the outer diameter of the inner / outer cylinder fixing pin 7. Of these, except for the inner diameter of the hole 31 in the outer cylinder 3, the outer circumference is machined using a machine tool that cuts the fixing pin insertion groove 26 and the inner / outer cylinder fixing pin 7, so high-precision machining can be achieved. Therefore, the axial misalignment between the inner cylinder 2 and outer cylinder 3 can be minimized. Because the gap between the inner cylinder 2 and outer cylinder 3 can be reduced, the diameter of the cylinder lock 1 can be made smaller.

[0039] As shown in FIGS. 2 to 4 and 6 , the two inner / outer cylinder fixing pins 7 inserted into the two fixing pin insertion holes 37 are held down by a holding member 8 from the radial outside of the outer cylinder 3. This prevents the inner / outer cylinder fixing pins 7 from slipping out of the outer cylinder 3 due to their own weight. In this embodiment, the holding member 8 is an arc-shaped spring member formed by bending a rod-shaped body made of metal with 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 holding member 8. The holding member 8 is housed in an accommodation groove 38 formed along the circumferential direction on the outer peripheral surface 30 at the end of the front side X1 of the outer cylinder 3. The accommodation groove 38 is formed around the entire circumference of the outer cylinder 3 and crosses the two fixing pin insertion holes 37.

[0040] Two presser member locking grooves 331 are formed in the outer peripheral surface 30 of the outer tube 3 and arranged with a circumferential gap between them. The two presser member locking grooves 331 are recessed into the outer peripheral surface 30 at the end of the front side X1 of the outer tube 3 so as to open radially outward of the outer tube 3 and toward the front side X1. The presser member locking grooves 331 are arranged at positions offset from the lid material mounting groove 33 toward the two fixing pin insertion holes 37 into which the two inner and outer tube fixing pins 7 are inserted. The two presser member locking grooves 331 are each circumferentially connected to the lid material mounting groove 33 on the outer peripheral surface 30 of the outer tube 3.

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

[0042] The retaining member 8 attached to the accommodating groove 38 is positioned within the accommodating groove 38 so as to cross the end faces of the small diameter portions 71 of the two inner and outer cylinder fixing pins 7. This allows the two inner and outer cylinder fixing pins 7 to be pressed from the radial outside of the outer cylinder 3 so as not to slip out of the fixing pin insertion holes 37. As shown in FIGS. 4 and 6 , 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 positioned at a position recessed radially inward from the outer peripheral surface 30 of the outer cylinder 3 by a distance at least equal to the outer diameter of the rod-shaped body forming the retaining member 8. The depth of the accommodating groove 38 is at least equal to or greater than the outer diameter of the rod-shaped body forming the retaining member 8. This means that even when the retaining member 8 presses the two inner and outer cylinder fixing pins 7 from the radial outside of the outer cylinder 3, the outer diameter of the outer cylinder 3 does not increase, and does not hinder the cylinder lock 1 from being made smaller in diameter.

[0043] The retaining member 8 merely holds the inner / outer cylinder fixing pin 7 to the extent that it does not slip out of the fixing pin insertion hole 37, and does not substantially apply a biasing force to the inner / outer cylinder fixing pin 7 toward the inner cylinder 2. Because the inner / outer cylinder fixing pin 7 does not press against the inner cylinder 2, it does not provide resistance when the inner cylinder 2 rotates relative to the outer cylinder 3. Therefore, the inner cylinder 2 can rotate smoothly relative to the outer cylinder 3.

[0044] Because 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. This prevents rattling of the inner cylinder 2 relative to the outer cylinder 3 in the direction of rotation about the central axes 7a of the inner and outer cylinder fixing pins 7.

[0045] Axial positioning and retention of the inner and outer cylinders 2 and 3 can be achieved simply by inserting the inner and outer cylinder fixing pin 7 into the fixing pin insertion hole 37 from the radial outside of the outer cylinder 3 and pressing it down with the retaining member 8, making it easy to fit the inner and outer cylinders 2 and 3 together. Because the fixing pin insertion hole 37 is not covered by the lid member 6, the positioning of the inner and outer cylinders 2 and 3 can be easily released by simply removing the retaining 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 grasping the small diameter portion 71 with a tool such as tweezers.

[0046] In the above embodiment, the inner and outer cylinder fixing pins 7 are inserted into two of the four fixing pin insertion holes 37 that make up one set of the four fixing pin insertion holes 37 formed in the outer cylinder 3, but the two inner and outer cylinder fixing pins 7 may be inserted into any two of the four fixing pin insertion holes 37, provided that the two inner and outer cylinder fixing pins 7 are not arranged at an angle of 180 degrees around the circumference of the outer cylinder 3. The fixing pin insertion holes 37 may be inserted into all four fixing pin insertion holes 37.

[0047] The cylinder lock 1 of this embodiment has the following advantages.

[0048] (1) The cylinder lock 1 comprises an inner cylinder 2 and an outer cylinder 3 into which the inner cylinder 2 is rotatably fitted. The inner cylinder 2 has a fixing pin insertion groove 26 extending circumferentially on its outer peripheral surface 20. The outer cylinder 3 has a fixing pin insertion hole 37 that communicates with the fixing pin insertion groove 26 at a position corresponding to the fixing pin insertion groove 26. When the inner / outer cylinder fixing pin 7 is inserted into the fixing pin insertion hole 37 toward the fixing pin insertion groove 26, the inner cylinder 2 is positioned relative to the outer cylinder 3 so that it can rotate and cannot come out in the axial direction.

[0049] This allows the inner tube 2 to rotate freely relative to the outer tube 3, and the axial deviation between the inner tube 2 and the outer tube 3 can be minimized, making it possible to provide a cylinder lock 1 that can be made smaller in diameter.

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

[0051] This prevents the inner / outer cylinder fixing pin 7 from slipping out of the fixing pin insertion hole 37 due to its own weight. Because the retaining member 8 only presses the inner / outer cylinder fixing pin 7 from the outside in the radial direction, the inner / outer cylinder fixing pin 7 does not press against the inner cylinder 2 and does not provide resistance when the inner cylinder 2 rotates relative to the outer cylinder 3. Therefore, the inner cylinder 2 can rotate smoothly relative to the outer cylinder 3.

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

[0053] This allows the retaining member 8 to be easily attached to and detached from the outer tube 3, and therefore the inner / outer tube fixing pin 7 can be easily removed. Therefore, the positioning state between the inner tube 2 and the outer tube 3 can be easily released.

[0054] (4) In the cylinder lock 1 described in (3) above, the outer peripheral surface 30 of the outer cylinder 3 is formed with an accommodation groove 38 in which the pressing member 8 is accommodated along the circumferential direction.

[0055] According to this, even when the pressing member 8 is attached, the outer diameter of the outer cylinder 3 does not become larger, and therefore the cylinder lock 1 can be made smaller in diameter.

[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 a plurality of inner and outer cylinder fixing pins 7 are provided.

[0057] This allows the inner cylinder 2 to be positioned more stably relative to the outer cylinder 3 so that it can rotate and cannot slip out in the axial direction.

[0058] (6) In the cylinder lock 1 described in (5) above, the angle θ at which the respective center 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] This prevents the inner cylinder 2 from rattling relative to the outer cylinder 3 in the direction of rotation about the central axis 7a of the inner / outer cylinder fixing pin 7. Therefore, the inner cylinder 2 can rotate more smoothly.

[0060] 8 shows a door 200, which is a fixture equipped with the cylinder lock 1 according to this embodiment. The door 200 is placed in a door opening 300 in a building frame so as to be able to open and close. The door 200 has, on the door end side, a handle 201 for opening and closing the door 200, and a pair of cylinder locks 1 disposed above and below the handle 201. The door 200 is used, for example, as a front door.

[0061] In this embodiment, a front door is shown as an example of a fixture to which the cylinder lock 1 is attached, but this is not limited to a front door. The cylinder lock 1 can be applied to any door or door frame that requires security, such as a back door, terrace door, gate, interior door, shutter, etc. Furthermore, the cylinder lock 1 can be applied to anything other than fixtures, such as a delivery box, locker, safe, or refrigerator, as long as it is applicable to such doors.

[0062] The present disclosure includes cylinder locks and fixtures according to the following aspects.

[0063] <Aspect 1> A cylinder lock comprising an inner tube and an outer tube rotatably fitted with the inner tube, wherein the inner tube has a fixing pin insertion groove extending circumferentially on its outer peripheral surface, and the outer tube has a fixing pin insertion hole communicating with the fixing pin insertion groove at a position corresponding to the fixing pin insertion groove, and a fixing pin is inserted into the fixing pin insertion hole toward the fixing pin insertion groove, thereby positioning the inner tube relative to the outer tube so that it is rotatable and cannot be removed axially.

[0064] <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.

[0065] <Aspect 3> The cylinder lock according to aspect 2, wherein the pressing member is elastically attached to the outer peripheral surface of the outer cylinder along the circumferential direction.

[0066] <Aspect 4> The cylinder lock according to aspect 2 or 3, wherein an accommodation groove for accommodating the pressing member is formed along the circumferential direction on the outer peripheral surface of the outer cylinder.

[0067] <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.

[0068] <Aspect 6> The cylinder lock according to Aspect 5, wherein the angle at which the central axes of the at least two fixing pins inserted into the at least two fixing pin insertion holes intersect with the circumferential direction of the outer cylinder is less than 180 degrees.

[0069] <Aspect 7> A fitting comprising the cylinder lock according to any one of aspects 1 to 6.

[0070] DESCRIPTION OF SYMBOLS 1 Cylinder lock, 2 Inner cylinder, 3 Outer cylinder, 7 Inner / outer cylinder fixing pin, 7a Central axis of inner / outer cylinder fixing pin, 8 Pressing member, 20 Outer peripheral surface of inner cylinder, 26 Fixing pin insertion groove, 30 Outer peripheral surface of outer cylinder, 37 Fixing pin insertion hole, 37a Central axis of fixing pin insertion hole, 38 Storage groove, 100 Door

Claims

1. A cylinder lock comprising an inner tube and an outer tube into which the inner tube is rotatably fitted, wherein the inner tube has a fixing pin insertion groove extending circumferentially on its outer circumferential surface, and the outer tube has a fixing pin insertion hole at a position corresponding to the fixing pin insertion groove and communicating with the fixing pin insertion groove, and a fixing pin is inserted into the fixing pin insertion hole, thereby positioning the inner tube relative to the outer tube so that it is rotatable and cannot be removed in the axial direction.

2. A cylinder lock as described in claim 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.

3. A cylinder lock as described in claim 2, wherein the pressing member is elastically attached to the outer peripheral surface of the outer cylinder along the circumferential direction.

4. A cylinder lock as described in claim 3, wherein an accommodation groove for accommodating said pressing member is formed along the circumferential direction on the outer peripheral surface of said outer cylinder.

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

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

7. A fitting comprising a cylinder lock according to any one of claims 1 to 6.

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