Cylinder lock and building equipment device group

Abstract

To provide a cylinder lock including a key change mechanism capable of improving convenience.SOLUTION: A cylinder lock includes: an inner cylinder having a key hole to which an unlock key is inserted; an outer cylinder to which the inner cylinder is rotatably fit; and a key change mechanism arranged in the axial direction and provided having therebetween a shear line between the inner cylinder and the outer cylinder. The cylinder lock can be locked or unlocked by the same unlock key to any of a plurality of cylinder locks having different lengths in the axial direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a cylinder lock and a building equipment group. [Background technology]

[0002] Conventionally, multiple doors, such as the front door and back door, are equipped with the same lock so that they can be locked and unlocked with the same key (one key). In this case, if a key is lost and a replacement key is needed, the keys and locks on all doors must be replaced at the same time, which is very costly. Therefore, in order to be able to lock and unlock multiple doors with the same key, it is desirable to use a cylinder lock with a key change mechanism, taking into account security and the cost of replacing locks.

[0003] Known cylinder locks equipped with key change mechanisms include those that have a key change mechanism that has an intermediate pin, an intermediate pin storage section, a stocker pin, an intermediate pin evacuation hole, and an upper retaining pin across the inner and outer cylinders, and are configured so that when a new key is used, the original key becomes unusable (see, for example, Patent Document 1).

[0004] This cylinder lock is configured so that when a new key is inserted into the keyhole, the intermediate pin stored in the intermediate pin storage compartment of the inner cylinder moves beyond the sheer line toward the outer cylinder. When the inserted key is rotated in the key change direction, the intermediate pin that has moved toward the outer cylinder is stored in the intermediate pin evacuation hole located next to the original intermediate pin storage compartment in the inner cylinder. This causes the tumbler pin in the outer cylinder that corresponds to the original intermediate pin storage compartment to protrude beyond the sheer line toward the inner cylinder, making it impossible to unlock the lock with the original key. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-38429 Summary of the Invention [Problem to be solved by the invention]

[0006] If the same key could be used to lock and unlock not only front doors and back doors, but also multiple types of building equipment installed in a building such as a house, such as gates, delivery boxes, garage shutters, window shutters, and mailboxes, the convenience of the building would be greatly improved.

[0007] However, since building equipment varies in size depending on the type, the axial length of the lock used may differ depending on the type of building equipment, which poses a challenge in terms of improving convenience.

[0008] Therefore, an object of the present disclosure is to provide a cylinder lock equipped with a key change mechanism that can improve convenience, and a group of building equipment that has improved convenience. [Means for solving the problem]

[0009] The present disclosure relates to a cylinder lock comprising an inner cylinder having a keyhole into which an unlocking key is inserted, an outer cylinder into which the inner cylinder is rotatably fitted, and a key change mechanism arranged axially across the sheer line between the inner cylinder and the outer cylinder, wherein the same unlocking key can be used to lock and unlock multiple cylinder locks of different axial lengths.

[0010] The present disclosure relates to a cylinder lock comprising an inner tube having a keyhole for inserting an unlocking key, an outer tube into which the inner tube is rotatably fitted, and a pin structure arranged axially and constituting a key change mechanism located across the sheer line between the inner tube and the outer tube, the cylinder lock having a first pin structure row and a second pin structure row each formed by arranging a plurality of the pin structures at a predetermined pitch along the axial direction of the cylinder lock.

[0011] The present disclosure relates to a building facility equipment group consisting of multiple types of building facility equipment each equipped with an opening and closing member, wherein the multiple types of building facility equipment have a common cylinder lock, the cylinder lock comprising an inner cylinder having a keyhole into which an unlocking key is inserted, an outer cylinder into which the inner cylinder is rotatably fitted, and a key change mechanism arranged axially and sandwiching a sheer line between the inner cylinder and the outer cylinder, and wherein the same unlocking key can be used to lock and unlock any of the multiple cylinder locks having different axial lengths. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a cylinder lock and an unlocking key according to the present embodiment. FIG. [Figure 2] FIG. 2 is an exploded perspective view of the cylinder lock according to the embodiment. [Figure 3] 3 is an exploded perspective view of the cylinder lock according to the present embodiment, seen from a direction different from that of FIG. 2. FIG. [Figure 4] 1 is a front view of a cylinder lock according to an embodiment of the present invention, viewed from the side where an unlocking key is inserted. [Figure 5] 1 is a rear view of the cylinder lock according to the present embodiment, seen from the side opposite to the side where the unlocking key is inserted. FIG. [Figure 6] FIG. 5 is a cross-sectional view taken along line AA in FIG. [Figure 7] 3 is a front view of a cover member provided in the cylinder lock according to the present embodiment. FIG. [Figure 8] FIG. 2 is a view showing the outer peripheral surface on the front side of the inner cylinder. [Figure 9] FIG. 5 is a cross-sectional view taken along line BB in FIG. [Figure 10] FIG. [Figure 11] FIG. 10 is a diagram showing the engagement groove of the first unlocking key. [Figure 12] 10 is a cross-sectional view showing the operation of the key change mechanism when the first unlocking key is inserted into the keyhole. FIG. [Figure 13] 10 is a cross-sectional view showing the operation of the key change mechanism when the first unlocking key is inserted into the keyhole. FIG. [Figure 14]FIG. 10 is a diagram showing the engagement groove of the second unlocking key. [Figure 15] 10 is a cross-sectional view showing the operation of the key change mechanism when a second unlocking key is inserted into the keyhole. FIG. [Figure 16] 10 is a cross-sectional view showing the operation of the key change mechanism when a second unlocking key is inserted into the keyhole. FIG. [Figure 17] 10 is a cross-sectional view showing the operation of the key change mechanism when a second unlocking key is inserted into the keyhole. FIG. [Figure 18] 10 is a cross-sectional view showing the operation of the key change mechanism when a second unlocking key is inserted into the keyhole. FIG. [Figure 19] 10 is a cross-sectional view showing the operation of the key change mechanism when a second unlocking key is inserted into the keyhole. FIG. [Figure 20] 1. FIG. 4 is a perspective view showing another cylinder lock that can be locked and unlocked with the same unlocking key as that shown in FIG. [Figure 21] FIG. 21 is a cross-sectional view of the cylinder lock shown in FIG. 20. [Figure 22] 1 is a front view showing an entrance door equipped with a cylinder lock according to an embodiment of the present invention. [Figure 23] A front view showing a delivery box equipped with a cylinder lock according to this embodiment. [Figure 24] 1 is a front view showing a gate equipped with a cylinder lock according to an embodiment of the present invention. [Figure 25] This is a conceptual diagram showing how to lock and unlock multiple types of building equipment and fixtures using the same unlocking key. [Figure 26] This is a conceptual diagram showing how to change the keys of multiple types of building equipment and fixtures using the same unlocking key. [Figure 27] FIG. 10 is a conceptual diagram of a security area when locking and unlocking are performed using the same unlocking key. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The cylinder lock 1 according to this embodiment is used with multiple unlocking keys that can lock and unlock the cylinder lock 1. The cylinder lock 1 according to this embodiment can use 11 unlocking keys, from the first to the eleventh, but this specification and drawings will only show and explain two of the 11 unlocking keys: unlocking key 100 (see FIGS. 1 and 11) and unlocking key 100A (see FIG. 14). Unlocking key 100 is the first unlocking key, and unlocking key 100A is the second unlocking key.

[0014] As shown in Fig. 6, the cylinder lock 1 has a first axial length L10. As shown in Figs. 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 consisting of a spring that biases the driver pin 41 toward the tumbler pin 42, a click pin 5, a pair of cover members 6, an inner / outer cylinder fixing pin 7, a pressing member 8, and a key change mechanism 9.

[0015] Here, the directions in each figure are 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 of the room, and the rear side X2 is the inside of the room.

[0016] 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 cylindrical keyhole 21 is formed in the inner cylinder 2 along the axial direction of the inner cylinder 2, into which the unlocking key 100, 100A can be inserted.

[0017] 2 and 3, a plurality of cylindrical pin holes 22 are formed on the outer peripheral surface 20 of the inner cylinder 2, each communicating with a corresponding keyhole 21. 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 row of pin holes is formed by arranging a plurality of pin holes 22 along the axial direction of the inner cylinder 2.

[0018] 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 portion on 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.

[0019] 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 drive 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 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 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 drive 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 tips of the unlocking keys 100, 100A inserted into the keyholes 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 keys 100, 100A.

[0020] 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 of 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.

[0021] As shown in Figures 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 Figure 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 of the cylinder lock 1 (not shown).

[0022] The outer cylinder 3 is formed with a cylindrical hole portion 31 along the axial direction of the outer cylinder 3, into which the inner cylinder 2 can be fitted. 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 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 cylinder 3 are arranged to be able to communicate with the plurality of pin holes 22 in the inner cylinder 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 cylinder 3. Similar to the pin hole row in the inner cylinder 2, multiple rows of pin hole rows are formed in the circumferential direction of the outer cylinder 3. The plurality of pin holes 22 in the inner cylinder 2 and the plurality of pin holes 32 in the outer cylinder 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 cylinder 2 is rotated relative to the outer cylinder 3 and positioned at a predetermined position.

[0023] 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 bent portions 62 of the lid material 6, which will be described later.

[0024] As shown in Figures 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 so as 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 outside in the radial direction of the outer tube 3 through 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.

[0025] 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 a pin 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, 100A 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.

[0026] In the cylinder lock 1, the functions of the driver pin 41, the tumbler pin 42, and the biasing member 43 are well known, so in Figure 9 and subsequent figures, the driver pin 41, the tumbler pin 42, and the biasing member 43 are not shown.

[0027] The click pin 5 is a member that suppresses the rotation of the inner tube 2 relative to the outer tube 3 when the rotation state of the inner tube 2 relative to the outer tube 3 is such that the unlocking key 100, 100A can be inserted and removed from the keyhole 21. The click pin 5 is cylindrical. The axial direction of the click pin 5 is along the axial direction 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 in the cutout portion 34 does not protrude radially outward beyond the outer circumferential surface 30 of the outer tube 3.

[0028] The click pin 5 housed in the cutout portion 34 is urged toward the inner tube 2 by an arc-shaped torsion spring 51 serving as a urging member. The torsion spring 51 is attached to a spring attachment groove 35 formed along the circumferential direction on the outer peripheral surface 30 at the end of the rear side X2 of the outer tube 3. Two ends 51a of the torsion spring 51 are engaged with spring engagement grooves 36 formed on the outer peripheral surface 30 of the outer tube 3. The torsion spring 51 attached to the spring attachment groove 35 engages with the narrowed portion 5a of the click pin 5 and applies an urging force from the radially outside of the outer tube 3.

[0029] In the state shown in Figure 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 turning the unlocking key 100. This allows the user to recognize the position where the unlocking key 100 can be inserted and 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 and removable position. The torsion spring 51 that biases the click pin 5 engages with the narrowed 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 made smaller.

[0030] 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. Because the lid member 6 covers 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 end of the rear side X2 of the lid member 6 does not cover the spring mounting groove 35.

[0031] In this embodiment, two cover materials 6 are provided on the outer cylinder 3. The two cover materials 6 are combined to form a substantially cylindrical shape on the outer peripheral surface 30 of the outer cylinder 3. By providing multiple cover materials 6, the assembly workability of the cylinder lock 1 can be improved compared to when a single cylindrical cover material is used. It is preferable to use spring steel as the material for the cover materials 6. This makes it possible to closely contact the cover materials 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.

[0032] As shown in Fig. 7, the cover member 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 on both ends of the curved portion 61. The curved portion 61 has a cross-sectional shape that is approximately semicircular. The bent portions 62 are arranged on 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 members 6, 6 have the same shape and are arranged in positions that are symmetrical about the central axis J of the cylinder lock 1.

[0033] The two lid materials 6 are attached to the outer peripheral surface 30 of the outer cylinder 3 by engaging the 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.

[0034] Next, a description will be given of the structure for preventing the inner cylinder 2 and the outer cylinder 3 from coming off in the axial direction in the cylinder lock 1 of this embodiment.

[0035] 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 all around. The multiple pin holes 22 of the inner cylinder 2 are located on the rear side X2 of the fixing pin insertion groove 26.

[0036] 2, 3, and 6, a cylindrical fixing pin insertion hole 37 is formed in the outer peripheral surface 30 at the end portion on 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 portion on the front side X1 of the lid member 6 does not cover the fixing pin insertion hole 37.

[0037] 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 tube 2. Therefore, when the inner tube 2 and the outer tube 3 are fitted together, the fixing pin insertion groove 26 and step portions 26a located on both 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 tube 2.

[0038] 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 at which 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.

[0039] At least two of the multiple fixation pin insertion holes 37 can accommodate inner and 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 and outer cylinder fixation pin 7. As shown in FIGS. 4 and 6 , the inner and 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 and 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 for restricting 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 for fixing it.

[0040] The axial length of the inner and 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 and 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 and 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.

[0041] 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 portion 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 penetrates 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 fitted into the hole 31 of the outer cylinder 3 while being positioned relative to the outer cylinder 3 so that it cannot slip out in the axial direction. 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 in an unlocked state by inserting the unlocking key 100 into the keyway 21, the inner cylinder 2 can freely rotate relative to the outer cylinder 3.

[0042] 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 outside in the radial direction 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 past. 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.

[0043] 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, all but the inner diameter of the hole 31 in the outer cylinder 3 are machined using a machine tool that cuts the fixing pin insertion groove 26 and the inner / outer cylinder fixing pin 7, allowing for high-precision machining. This minimizes the amount of axial misalignment between the inner cylinder 2 and outer cylinder 3. 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.

[0044] 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 outside in the radial direction 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. The holding member 8 in this embodiment 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 on 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.

[0045] Two pressing member locking grooves 331 are formed on the outer peripheral surface 30 of the outer cylinder 3 and arranged with a circumferential gap between them. The two pressing member locking grooves 331 are recessed into the outer peripheral surface 30 at the end of the front side X1 of the outer cylinder 3 so as to open radially outward and toward the front side X1 of the outer cylinder 3. The pressing 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 / outer cylinder fixing pins 7 are inserted. The two pressing member locking grooves 331 are each circumferentially connected to the lid material mounting groove 33 on the outer peripheral surface 30 of the outer cylinder 3.

[0046] 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.

[0047] 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 prevents the outer diameter of the outer cylinder 3 from increasing 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, and does not hinder the cylinder lock 1 from being made smaller in diameter.

[0048] 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 toward the inner cylinder 2 to the inner / outer cylinder fixing pin 7. 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.

[0049] Because the central axes 37a of the two fixing pin insertion holes 37 intersect at an angle θ 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 less than 180 degrees. This prevents the inner cylinder 2 from rattling 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.

[0050] 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.

[0051] 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 they 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.

[0052] Next, the key change mechanism 9 of this embodiment will be described. As shown in Figures 2 and 3, the key change mechanism 9 is composed of a key change pin structure 90 made up of a lower pin 91, an upper pin 92, a sphere 93, and a biasing member 94, a lower pin hole 95 and a sphere accommodating groove 96 formed in the inner cylinder 2, and an upper pin hole 97 formed in the outer cylinder 3. The pin structure 90 is arranged across the sheer line formed between the inner cylinder 2 and the outer cylinder 3, spanning between the inner cylinder 2 and the outer cylinder 3.

[0053] As shown in FIGS. 2, 3, 8, and 9, a plurality of lower pin holes 95 are formed on the outer peripheral surface 20 of the inner cylinder 2. The lower pin holes 95 have a cylindrical shape that penetrates the inner cylinder 2 and communicates with the keyhole 21. The lower pin holes 95 are holes into which the lower pins 91 of the pin structure 90 can be inserted and removed. In the inner cylinder 2 of this embodiment, one lower pin hole row 950 is formed by five lower pin holes 95 arranged along the axial direction. In the inner cylinder 2 of this embodiment, two lower pin hole rows 950, 950 are formed with a distance between them in the circumferential direction of the inner cylinder 2. Specifically, the two lower pin hole rows 950, 950 are arranged diagonally across the keyhole 21. In other words, the two lower pin hole rows 950, 950 are arranged 180 degrees apart in the circumferential direction of the inner cylinder 2.

[0054] All of the lower pin holes 95 have the same shape. As shown in Figure 10, the lower pin holes 95 have a tapered surface 95a at their openings to the outer circumferential surface 20 of the inner cylinder 2, which has a shape that gradually increases in diameter as it goes radially outward from the inner cylinder 2. An annular step portion 95b is formed on the inner circumferential surface of the lower pin holes 95. As a result, the lower pin holes 95 are formed with a smaller diameter radially inward from the step portion 95b all the way to the keyhole 21.

[0055] All of the sphere accommodating grooves 96 have the same shape. As shown in Figures 2, 3, and 8, the sphere accommodating grooves 96 are formed on the outer peripheral surface 20 of the inner tube 2 so as to correspond one-to-one to the lower pin holes 95. Therefore, in the inner tube 2 of this embodiment, a total of ten sphere accommodating grooves 96 are formed, five in each row, corresponding to the two rows of lower pin holes 950, 950. The sphere accommodating grooves 96 are grooves that can accommodate the spheres 93 that constitute the pin structure 90. The spheres 93 constitute intermediate bodies, as will be described later. The sphere accommodating groove 96 is an intermediate body accommodating groove that accommodates intermediate bodies made of the spheres 93.

[0056] The sphere accommodating groove 96 is recessed in the outer peripheral surface 20 of the inner cylinder 2 and does not penetrate the inner cylinder 2. The sphere accommodating groove 96 is arranged adjacent to the lower pin hole 95 in the circumferential direction of the inner cylinder 2. More specifically, the sphere accommodating groove 96 is arranged adjacent to each lower pin hole 95 in the circumferential direction of the inner cylinder 2. More specifically, the sphere accommodating groove 96 is arranged near the corresponding lower pin hole 95, adjacent to the lower pin hole 95 in the opposite direction to the rotation direction of the inner cylinder 2 when unlocking. In this embodiment, the rotation direction of the inner cylinder 2 when unlocking is clockwise when viewed from the front side X1 of the cylinder lock 1.

[0057] 8, the sphere accommodating groove 96 has a groove width W2 along the axial direction of the inner cylinder 2 that is smaller than a groove width W1 along the circumferential direction of the inner cylinder 2. The groove width W2 is larger than the diameter of the sphere 93 that constitutes the pin structure 90. The groove width W2 is smaller than the outer diameter of the tip surface 92a of the upper pin 92 that constitutes the pin structure 90.

[0058] As shown in Figures 2, 3, 8, and 9, a plurality of upper pin holes 97 are formed on the outer peripheral surface 30 of the outer cylinder 3. Each upper pin hole 97 has a cylindrical shape penetrating the outer cylinder 3. The upper pin holes 97 are holes into which the upper pins 92 of the pin structure 90 can be inserted and removed. The upper pin holes 97 are provided in one-to-one correspondence with the lower pin holes 95 of the inner cylinder 2. Therefore, in the outer cylinder 3 of this embodiment, two rows of upper pin holes 970, 970 are arranged corresponding to the two rows of lower pin holes 950, 950 of the inner cylinder 2. As a result, a total of ten upper pin holes 97 are formed in the outer cylinder 3, with five holes in each row. The ten upper pin holes 97 of the outer cylinder 3 are arranged to align radially with the ten lower pin holes 95 of the inner cylinder 2 when the inner cylinder 2 and the outer cylinder 3 are locked. The radially outer side of the upper pin holes 97 is blocked by the cover member 6.

[0059] The pin structures 90 are arranged corresponding to two rows of lower pin hole rows 950, 950 and two rows of upper pin hole rows 970, 970. Therefore, in the cylinder lock 1, as shown in Fig. 9, a first pin structure row 900A and a second pin structure row 900B, each consisting of five pin structures 90 in each row along the axial direction, are arranged in diagonal positions on either side of the keyhole 21 in the cylinder lock 1. In other words, the two rows of pin structure rows 900A, 900B are arranged 180 degrees apart in the circumferential direction of the cylinder lock 1.

[0060] The five pin structures 90 constituting each of the pin structure arrays 900A and 900B are arranged at a predetermined pitch P in the axial direction of the cylinder lock 1. In this embodiment, the pitch P is constant, but the pitch P does not necessarily have to be constant. The pitch P may be different between the two pin structure arrays 900A and 900B. However, as shown in FIG. 9, one pin structure array 900B is shifted by half a pitch toward the rear side X2 of the cylinder lock 1 relative to the other pin structure array 900A. One pin structure 90 corresponds to one key change. Therefore, the cylinder lock 1 of this embodiment can perform a maximum of 10 key changes. Because the two pin structure arrays 900A and 900B are arranged in diagonal positions, even if the number of key changes is increased, the axial length of the cylinder lock 1 is prevented from increasing.

[0061] The key change operates in order starting from the pin structure 90 arranged on the front side X1 of the cylinder lock 1. Therefore, in the cylinder lock 1 of this embodiment, as shown in Fig. 9, the key change operation is performed alternately between the pin structure row 900A and the pin structure row 900B from the first pin structure 90A at the frontmost side X1 of the cylinder lock 1 to the tenth pin structure 90J at the rearmost side X2 of the cylinder lock 1.

[0062] The lower pin 91 constituting the pin structure 90 is a metal cylinder. As shown in Fig. 10, the lower pin 91 is inserted into a lower pin hole 95 of the inner cylinder 2 so as to be slidable in the radial direction of the inner cylinder 2. A tip portion 91a on the radially inner side of the lower pin 91 has a rounded, pointed shape. A rear end surface 91b on the radially outer side of the lower pin 91 is a flat surface.

[0063] The lower pin 91 has a small diameter portion 911 disposed radially inward and a large diameter portion 912 adjacent to the radially outer side of the small diameter portion 911. The small diameter portion 911 is inserted into the inside of the step portion 95b of the lower pin hole 95. The large diameter portion 912 abuts against the step portion 95b of the lower pin hole 95 from the radially outer side, thereby preventing the lower pin 91 from moving further radially inward.

[0064] The upper pin 92 constituting the pin structure 90 is a metal cylindrical body. As shown in Fig. 10, the upper pin 92 is inserted into an upper pin hole 97 of the outer cylinder 3 so as to be slidable in the radial direction of the outer cylinder 3. The upper pin 92 has a small diameter portion 921 disposed radially inward and a large diameter portion 922 adjacent to and radially outward of the small diameter portion 921. When the upper pin 92 moves toward the inner cylinder 2 beyond the shear line, the small diameter portion 921 can be inserted into the lower pin hole 95 of the inner cylinder 2 radially outward of the step portion 95b.

[0065] A concave spherical surface 923 is formed on the radially inner tip surface 92a of the upper pin 92. The concave spherical surface 923 is recessed in a spherical shape extending radially outward from the tip surface 92a of the upper pin 92. A recess 924 is formed on the radially outer rear end surface 92b of the upper pin 92. The recess 924 is recessed in a cylindrical shape extending radially inward from the rear end surface 92b of the upper pin 92.

[0066] The sphere 93 constituting the pin structure 90 is made of a metal ball and constitutes an intermediate body disposed between the upper pin 92 and the lower pin 91. The sphere 93 is disposed between the lower pin 91 and the upper pin 92. More specifically, the sphere 93 is disposed in contact with the rear end face 91b of the lower pin 91, and is disposed so as to be housed within the concave spherical surface 923 of the upper pin 92. The outer diameter of the sphere 93 is smaller than the outer diameter of the small diameter portion 921 of the upper pin 92. However, the intermediate body is not limited to a sphere. The intermediate body may be a short cylindrical body or the like.

[0067] The biasing member 94 constituting the pin structure 90 is made of a coil spring. The biasing member 94 is housed in the recess 924 of the upper pin 92 and is disposed in a compressed state between the lid member 6 and the upper pin 92. As a result, the biasing member 94 applies a biasing force to the upper pin 92 in a radially inward direction.

[0068] When the unlocking key 100, 100A is not inserted in the keyway 21, the lower pin 91, upper pin 92, and sphere 93 move radially inward due to the biasing force of the biasing member 94, as shown in FIG. 10. At this time, as shown in FIG. 10, the large diameter portion 912 of the lower pin 91 abuts against the step portion 95b of the lower pin hole 95. In this state, the tip portion 91a of the lower pin 91 is positioned to protrude into the keyway 21. The tip surface 92a of the upper pin 92 does not protrude toward the inner tube 2 and does not hinder the rotation of the inner tube 2. The sphere 93 is positioned in the lower pin hole 95 of the inner tube 2.

[0069] Next, the unlocking key 100 will be described with reference to Figures 1 and 11. The unlocking key 100 of this embodiment is the first unlocking key used for the cylinder lock 1. The unlocking key 100 is made of a cylindrical rod-shaped body. The unlocking key 100 is formed with a plurality of drive engagement grooves 101, a tumbler engagement groove 102, and a first key change engagement groove 103. A knob portion 120 is provided at the rear end of the unlocking key 100.

[0070] The plurality of drive engagement grooves 101 are formed at the tip of the unlocking key 100. The plurality of drive engagement grooves 101 are formed from the tip of the unlocking key 100 toward the rear end where the knob 120 is provided. The arrangement of the plurality of drive engagement grooves 101 corresponds to the circumferential arrangement of the drive ends 243 of the plurality of drive pins 24 that face the keyholes 21 of the inner cylinder 2. The length of the unlocking key 100 is set to a length that enables it to lock and unlock the cylinder lock with the longest axial length among the cylinder locks that are expected to be used and have various axial lengths.

[0071] The tumbler engagement groove 102 is formed on the outer peripheral surface of the unlocking key 100 along the axial direction of the unlocking key 100. The tumbler engagement groove 102 corresponds to the arrangement of the multiple tumbler pins 42 provided in the cylinder lock 1. By engaging the tumbler pins 42 with the tumbler engagement groove 102, the distance between the multiple driver pins 41 and the tumbler pins 42 coincides with the sheer line between the inner cylinder 2 and the outer cylinder 3. When the unlocking key 100 is rotated in the unlocking direction in this state, the inner cylinder 2 rotates relative to the outer cylinder 3.

[0072] The key change engagement groove 103 is formed on the outer peripheral surface of the unlocking key 100 along the axial direction of the unlocking key 100. Two key change engagement grooves 103, 103 are formed on the outer peripheral surface of the unlocking key 100 at positions 180 degrees apart in the circumferential direction, corresponding to the two pin structure arrays 900, 900. FIG. 11 shows the key change engagement groove 103 corresponding to the pin structure array 900A. This key change engagement groove 103 is formed to be engageable with the tip ends 91 a of all the lower pins 91 in the pin structure array 900A over the axial length L1 of the cylinder lock 1 shown in FIG. 9. In the unlocking key 100, the key change engagement groove 103 corresponding to the pin structure array 900B has the same shape as the key change engagement groove 103 corresponding to the pin structure array 900A and is formed to be engageable with the tip ends 91 a of all the lower pins 91 in the pin structure array 900B.

[0073] Next, the unlocking operation of the cylinder lock 1 using the first unlocking key 100 will be described with reference to Figures 12 and 13. During the unlocking operation, the driver pin 41 and the tumbler pin 42 operate to unlock by engaging with the tumbler engagement groove 102 of the unlocking key 100. Because the unlocking operation of the driver pin 41 and the tumbler pin 42 is well known, Figures 12 and 13 only show the operation of the first pin structure 90A that constitutes the pin structure array 900A.

[0074] As shown in FIG. 12, when the unlocking key 100 is inserted into the keyhole 21 of the cylinder lock 1, the tip 91a of the lower pin 91 of the first pin structure 90A engages with the key change engagement groove 103 of the unlocking key 100. At this time, the first pin structure 90A moves radially inward most due to the biasing force of the biasing member 94. Therefore, the large diameter portion 912 of the lower pin 91 abuts against the step portion 95b of the lower pin hole 95, and the tip surface 92a of the upper pin 92 does not protrude toward the inner cylinder 2 and does not exceed the sheer line. The sphere 93 is positioned within the lower pin hole 95 of the inner cylinder 2. The sheer line between the inner cylinder 2 and the outer cylinder 3 is positioned between the upper pin 92 and the sphere 93.

[0075] In this state, when the unlocking key 100 is rotated a predetermined angle in the unlocking direction, the inner cylinder 2 rotates a predetermined angle clockwise relative to the outer cylinder 3, as shown in Figure 13. At this time, a sheer line is located between the upper pin 92 and the sphere 93 of the pin structure 90A, so the lower pin 91 and the sphere 93 are housed in the lower pin hole 95 of the inner cylinder 2, and the upper pin 92 and the biasing member 94 are housed in the upper pin hole 97 of the outer cylinder 3, and the inner cylinder 2 rotates. In this way, the cylinder lock 1 is unlocked by the unlocking key 100.

[0076] Next, the unlocking key 100A will be described with reference to FIG. 14. The unlocking key 100A of this embodiment is the second unlocking key. The unlocking key 100A is made of the same cylindrical rod-shaped body as the unlocking key 100. The unlocking key 100A is formed with a plurality of drive engagement grooves 101, a tumbler engagement groove 102, and a second key change engagement groove 103A. The plurality of drive engagement grooves 101 and the tumbler engagement groove 102 have the same configuration as the unlocking key 100.

[0077] The second key change engagement groove 103A is formed on the outer peripheral surface of the unlocking key 100A along the axial direction of the unlocking key 100A. This key change engagement groove 103A is an engagement groove corresponding to the pin structure array 900A including the first pin structure 90A. The axial length L2 of the key change engagement groove 103A from the tip of the unlocking key 100A is shorter than the axial length L1 of the key change engagement groove 103 of the unlocking key 100. The axial length L3, which is the difference between L1 and L2, corresponds to the pitch P between the pin structures 90, 90 arranged in the pin structure array 900A. As shown in FIG. 12, this axial length L3 does not include a groove large enough to move the lower pin 91 of the pin structure 90A radially inward. In this unlocking key 100A, the key change engagement groove corresponding to the pin structure array 900B has the same configuration as the key change engagement groove 103 of the unlocking key 100.

[0078] Next, the operation of unlocking the cylinder lock 1 using the second unlocking key 100A when the first unlocking key 100 is lost or the like will be described with reference to Figures 15 to 18. During the unlocking operation, the driver pin 41 and the tumbler pin 42 engage with the tumbler engagement groove 102 of the unlocking key 100A, thereby enabling unlocking. Because such unlocking operation of the driver pin 41 and the tumbler pin 42 is well known, Figures 15 to 18 only show the operation of the first pin structure 90A that constitutes the pin structure array 900A.

[0079] As shown in FIG. 15, when the unlocking key 100A is inserted into the keyway 21 of the cylinder lock 1, the tip 91a of the lower pin 91 of the first pin structure 90A abuts against the outer peripheral surface 100a of the unlocking key 100A and disengages from the key change engagement groove 103A. This is because the key change engagement groove 103A is not formed in the region of the axial length L3 corresponding to the lower pin 91 of the first pin structure 90A. Therefore, the tip 91a of the lower pin 91 does not protrude into the keyway 21 but is accommodated so as to retract into the lower pin hole 95 of the inner cylinder 2. The upper pin 92 is pushed by the sphere 93 and moves radially outward within the upper pin hole 97 while compressing the biasing member 94 against the biasing force. As a result, the rear end surface 91b of the lower pin 91 is positioned adjacent to the radially inner end of the tapered surface 95a of the lower pin hole 95. The sphere 93 is disposed on the shear line between the inner cylinder 2 and the outer cylinder 3 .

[0080] The contact surface of the upper pin 92 with the sphere 93 is a concave spherical surface 923, so the sphere 93 is naturally guided to press against the central axis of the upper pin 92. Therefore, when the upper pin 92 moves, the upper pin 92 does not rattle within the upper pin hole 97 and can move smoothly.

[0081] In this state, when the unlocking key 100A is rotated a predetermined angle in the unlocking direction, the inner cylinder 2 rotates a predetermined angle clockwise relative to the outer cylinder 3, as shown in Figure 16. The rear end surface 91b of the lower pin 91 is positioned adjacent to the radially inner end of the tapered surface 95a of the lower pin hole 95, and the sphere 93 is positioned on the sheer line. Therefore, when the inner cylinder 2 rotates, the sphere 93 is pushed radially outward and gradually moves toward the upper pin hole 97. At this time, the sphere 93 rolls on the tapered surface 95a of the lower pin hole 95, and thus moves smoothly toward the upper pin hole 97 as the inner cylinder 2 rotates. As a result, when the inner cylinder 2 rotates, only the lower pin 91 is accommodated in the lower pin hole 95 of the inner cylinder 2, and the upper pin 92 and sphere 93 are accommodated in the upper pin hole 97 of the outer cylinder 3. The second pin structure 90B to the tenth pin structure 90J other than the first pin structure 90A operate in the same manner as when the unlocking key 100 is inserted into the keyhole 21.

[0082] When the unlocking key 100A is further rotated in the unlocking direction to rotate the inner cylinder 2, the sphere accommodating groove 96 of the inner cylinder 2 and the upper pin hole 97 of the outer cylinder 3 become aligned radially, as shown in Fig. 17. As a result, the sphere 93 in the upper pin hole 97 is pushed by the upper pin 92, which is urged radially inward by the urging member 94, and is accommodated in the sphere accommodating groove 96. As shown in Fig. 8, the groove width W2 of the sphere accommodating groove 96 along the axial direction of the inner cylinder 2 is smaller than the outer diameter of the tip surface 92a of the upper pin 92. Therefore, even if the sphere accommodating groove 96 and the upper pin hole 97 become aligned radially, the upper pin 92 in the upper pin hole 97 will not fit into the sphere accommodating groove 96.

[0083] 18, when the unlocking key 100A is rotated in the return direction opposite to the unlocking direction to rotate the inner cylinder 2 counterclockwise, the lower pin hole 95 of the inner cylinder 2 and the upper pin hole 97 of the outer cylinder 3 are aligned radially. As a result, the upper pin 92 moves toward the inner cylinder 2 due to the biasing force of the biasing member 94. Because the sphere 93 is housed in the sphere housing groove 96, the upper pin 92 passes over the sheer line and fits into the lower pin hole 95 of the inner cylinder 2.

[0084] When the cylinder lock 1 is unlocked using the second unlocking key 100A in this manner, the sphere 93 is accommodated in the sphere accommodating groove 96 of the inner cylinder 2, and the rear end surface 91b of the lower pin 91 and the tip surface 92a of the upper pin 92 of the first pin structure 90A come into direct contact. In this state, when the first unlocking key 100 is inserted into the keyway 21 again, the tip end 91a of the lower pin 91 engages with the key change engagement groove 103 of the unlocking key 100, as shown in FIG. 19 . At this time, the lower pin 91 and the upper pin 92 move radially inward due to the biasing force of the biasing member 94. Because the sphere 93 is not present between the lower pin 91 and the upper pin 92, the upper pin 92 protrudes toward the inner cylinder 2 beyond the sheer line between the inner cylinder 2 and the outer cylinder 3. As a result, the small diameter portion 921 of the upper pin 92 fits into the lower pin hole 95, which is radially inward of the tapered surface 95a. Therefore, even if the unlocking key 100 is rotated in the unlocking direction, the inner cylinder 2 does not rotate because the upper pin 92 is positioned so as to straddle the sheer line, and therefore the cylinder lock 1 cannot be unlocked.

[0085] Similarly, by alternately shortening the key change engagement grooves of the unlocking keys corresponding to the pin structure array 900A and the pin structure array 900B by one pitch P, key change operations from the second pin structure 90B to the tenth pin structure 90J are possible. Therefore, in the cylinder lock 1 of this embodiment, the key change mechanism 9 allows 10 key change operations using 11 unlocking keys (first through eleventh). The key change mechanism 9 is comprised of only the pin structure 90 (composed of the lower pin 91, upper pin 92, sphere 93, and biasing member 94), the lower pin hole 95 and sphere receiving groove 96 of the inner cylinder 2, and the upper pin hole 97 of the outer cylinder 3, thereby reducing the radial size of the cylinder lock 1. Because the cylinder lock 1 is formed with a small diameter and compact size, it can be installed not only on large building equipment but also on small building equipment that was previously impossible to install.

[0086] In the cylinder lock 1, 1A shown in this embodiment, positioning of the unlocking key 100, 100A when inserted into the keyway is achieved by engaging multiple drive engagement grooves 101 formed at the tip of the unlocking key 100, 100A with drive ends 243 of multiple drive pins 24 arranged at the end of the rear side X2 of the inner cylinder 2, thereby allowing the inner cylinder 2 to rotate in synchronization with the rotation of the unlocking key 100, 100A. The drive engagement grooves 101 (sometimes referred to as "recesses") formed at the tip of the unlocking key 100, 100A engage with drive ends 243 (sometimes referred to as "protrusions"), which are the tips of the drive pins 24 provided at the end of the keyway 21, to achieve the positioning. In this way, positioning is performed at the end of the keyway 21, so that the same unlocking key 100, 100A can be used to lock and unlock multiple cylinder locks 1, 1A with different keyway 21 lengths, i.e., different axial lengths. Therefore, even if the axial lengths of the cylinder locks are different, they can be commonly used as long as the drive end 243 of the drive pin 24 is commonly arranged at the end of the rear side X2 of the inner cylinder 2.

[0087] 20 and 21 show another cylinder lock 1A having a different axial length from that of cylinder lock 1. Since parts with the same reference numerals as those in cylinder lock 1 have the same configuration, their explanations will be omitted below and will be omitted from the explanation of cylinder lock 1.

[0088] The cylinder lock 1A has a second axial length L20. As shown in FIG. 21, the second axial length L20 of the cylinder lock 1A is shorter than the first axial length L10 of the cylinder lock 1 shown in FIG. 6. The cylinder lock 1A has the same configuration as the cylinder lock 1, except that its axial length is shorter. In the cylinder lock 1A, the number of sets of driver pins 41 and tumbler pins 42 along the axial direction of the cylinder lock 1A and the number of sets of pin structures 90 constituting the key change mechanism 9 are fewer than those of the cylinder lock 1. Therefore, the number of locking / unlocking combinations and the number of key changes using the driver pins 41 and tumbler pins 42 of the cylinder lock 1A are fewer than those of the cylinder lock 1. However, the cylinder lock 1A has the same drive pin 24 as the cylinder lock 1 at the end of the rear side X2, allowing locking / unlocking and key changes using the same unlocking keys 100 and 100A as the cylinder lock 1. This cylinder lock 1A can be preferably applied to smaller building equipment where it is difficult to install the cylinder lock 1.

[0089] In the cylinder locks 1, 1A, a locking mechanism (not shown) that operates in conjunction with the rotation of the inner cylinder 2 due to the rotation of the unlocking key 100, 100A is connected to the end of the rear side X2 of the inner cylinder 2. The locking mechanism is selected depending on the building equipment to which the cylinder locks 1, 1A are attached. For example, the locking mechanism may be a locking mechanism in which a deadbolt extends and retracts in conjunction with the rotation of the inner cylinder 2 to lock and unlock the door. The locking mechanism may also be a locking mechanism consisting of a cam lock in which a cam rotates in conjunction with the rotation of the inner cylinder 2 to lock and unlock the door.

[0090] FIG. 22 shows an entrance door 200, which is a fixture. The entrance door 200 is one form of building equipment. The entrance door 200 is an opening / closing member that is placed in a door opening 300 in the building frame so that it can be opened and closed. The entrance door 200 has a handle 201 for opening and closing operations on the door end side, and a pair of cylinder locks 1 arranged above and below the handle 201. The pair of cylinder locks 1 may be cylinder locks 1A.

[0091] FIG. 23 shows a delivery box 400. Delivery box 400 is one type of building equipment. Delivery box 400 has door body 402, which is an openable / closable member, on the front of housing 401, which has a luggage storage compartment formed inside. Door body 402 has handle 403 on the door edge side. Cylinder lock 1 is attached to handle 403. Cylinder lock 1 may be cylinder lock 1A.

[0092] FIG. 24 shows a gate 500. The gate 500 is one form of building equipment. The gate 500 has a pair of door bodies 502, 502 that are attached to left and right wall portions 501, 501 in an openable and closable manner. The pair of door bodies 502, 502 are opening and closing members. The door bodies 502, 502 each have a handle 503, 503 on the door edge side. A cylinder lock 1 is attached to the door edge side of one of the door bodies 502. The cylinder lock 1 may be a cylinder lock 1A.

[0093] These are merely examples of building equipment to which the cylinder lock 1, 1A according to the present embodiment can be applied. In addition to the front door 200, delivery box 400, and gate 500, the cylinder lock 1, 1A according to the present embodiment can be applied to any building equipment equipped with an opening / closing member, such as a door, that requires security. The cylinder lock 1, 1A can also be applied to, for example, back doors, terrace doors, window surrounds, interior doors, garage shutters, window shutters, mailboxes, padlocks, crescents, safes, showcases, refrigerators, freezers, storage rooms (e.g., wine cellars), closets, furniture drawers, jewelry boxes, and doors of machine rooms where various mechanical equipment is installed. In this way, the cylinder lock 1, 1A according to the present embodiment can be applied to a building equipment group consisting of multiple types of building equipment, regardless of whether they are large or small, installed in a building such as a residence. In other words, each building equipment that makes up the building equipment group can be equipped with a common cylinder lock 1, 1A that locks and unlocks its opening / closing member using the same unlocking key.

[0094] Therefore, by applying the cylinder locks 1, 1A to multiple types of building equipment, they can be locked and unlocked using a common (identical) unlocking key 100 (first key) as shown in Figure 25. By changing the key of multiple types of building equipment to a second unlocking key 100A (second key) as shown in Figure 26, the first unlocking key 100 (first key) can all be made unusable for the multiple types of building equipment, and they can all be locked and unlocked using the same unlocking key 100A after the key change.

[0095] These multiple types of building equipment can be placed in multiple areas, each with a different division. Figure 27 is a conceptual diagram of security areas when the same unlocking key is used to lock and unlock. Shown here are a first area A1, a second area A2, a third area A3, and a fourth area A4.

[0096] Multiple areas with different divisions refer to areas with multiple different uses. For example, in the case of a single building, the first area A1 is the building site. A first security line is formed by a fence, railing, wall, etc. built around the perimeter of the site. The second area A2 is the building built on the site. A second security line is formed by the exterior walls of the building. The third area A3 is each room within the building. A third security line is formed for each room by partition walls within the building. The fourth area A4 is important items installed inside the rooms, and this forms a fourth security line. Each of the first area A1 to the fourth area A4 has a different security level. The security level indicates whether or not people are allowed within the security line of each area. Generally, if the area is a general residence, the security level is the same as home security, and the second area A2 is generally set to the highest security level to prevent unauthorized entry into the building. If the area is an experimental facility, research facility, factory, office building, etc., a higher security level than home security is required.

[0097] In multiple areas with different security levels, building facility equipment corresponding to the security level of each area is selected and installed from a group of building facility equipment consisting of multiple types of building facility equipment equipped with cylinder locks of different axial lengths (e.g., cylinder locks 1 and 1A). Examples of building facility equipment installed in the first area A1 include gates, delivery boxes, and mailboxes. Examples of building facility equipment installed in the second area A2 include front doors, back doors, terrace doors, windows, shutters, and other doors installed in openings formed in exterior walls. Examples of building facility equipment installed in the third area A3 include interior doors installed at the entrances and exits of rooms such as living rooms, bedrooms, children's rooms, and storerooms. Examples of building facility equipment installed in the fourth area A4 include safes, jewelry boxes, showcases, refrigerators, and closets. The higher the security level of an area, the longer the axial length of the cylinder locks installed in the building facility equipment and the greater the number of sets of driver pins and tumbler pins installed in the cylinder locks.

[0098] The cylinder lock 1 shown in this embodiment has a longer axial length than the cylinder lock 1A. As a result, the number of sets of driver pins 41 and tumbler pins 42 provided in the cylinder lock 1 increases, which in turn increases the number of different keys, resulting in an example of high security. This cylinder lock 1 is applied, for example, to building equipment installed in the second area A2. On the other hand, the cylinder lock 1A shown in this embodiment has a shorter axial length than the cylinder lock 1. As a result, the number of sets of driver pins 41 and tumbler pins 42 provided in the cylinder lock 1A decreases, which in turn reduces the number of different keys, resulting in an example of lower security than the cylinder lock 1. This cylinder lock 1A is applied, for example, to building equipment installed in the third area A3.

[0099] In this way, the cylinder locks 1, 1A of this embodiment are installed in multiple types of building equipment located in multiple areas with different partitions. This allows the same unlocking key 100 or 100A to be used to lock and unlock multiple types of building equipment, even if the security levels of the multiple areas are different. Furthermore, if the first unlocking key 100 is lost, the first unlocking key 100 can be changed to the next unlocking key 100A, making it impossible to use the first unlocking key 100 on the building equipment in all areas. Therefore, the security provided by the cylinder locks 1, 1A is maintained even if the security levels of the areas are different.

[0100] The cylinder locks 1, 1A and building equipment group of this embodiment have the following advantages.

[0101] The cylinder lock 1, 1A of this embodiment is a cylinder lock 1, 1A comprising an inner tube 2 having a keyhole 21 into which an unlocking key 100, 100A is inserted, an outer tube 3 into which the inner tube 2 is rotatably fitted, and a key change mechanism 9 arranged axially and sandwiched between the sheer line between the inner tube 2 and the outer tube 3, and the same unlocking key 100, 100A can be used to lock and unlock multiple cylinder locks 1, 1A with different axial lengths.

[0102] This means that even if cylinder locks 1, 1A with different axial lengths are installed depending on the type of building equipment, the same unlocking key 100, 100A can be used to lock and unlock multiple types of building equipment, thereby improving convenience.

[0103] In the cylinder lock 1, 1A of this embodiment, the key change mechanism 9 has an upper pin hole 97 formed radially in the outer tube 3, an upper pin 92 accommodated in the upper pin hole 97 so as to be movable radially, a biasing member 94 that biases the upper pin 92 radially inward, a lower pin hole 95 formed radially through the inner tube 2, a lower pin 91 accommodated in the lower pin hole 95 so as to be movable radially and arranged so that its tip 91a can protrude into the keyhole 21, a sphere 93 which is an intermediate body arranged between the upper pin 92 and the lower pin 91, and a sphere accommodating groove 96 which is an intermediate body accommodating groove formed in the inner tube 2 and arranged adjacent to the lower pin hole 95 in the direction opposite to the rotation direction of the inner tube 2 when unlocking.

[0104] This allows the key change mechanism 9 to be made up of only the lower pin 91, upper pin 92, sphere 93, and biasing member 94, the lower pin hole 95 and sphere receiving groove 96 of the inner cylinder 2, and the upper pin hole 97 of the outer cylinder 3, thereby reducing the radial size of the cylinder lock 1. Because the cylinder lock 1 is formed with a small diameter and compact size, it can be installed not only on large building equipment, but also on small building equipment that was previously impossible to install.

[0105] In the cylinder locks 1, 1A of this embodiment, the lower pin hole 95 has, at the opening to the outer circumferential surface 20 of the inner cylinder 2, a tapered surface 95a whose diameter gradually increases as it extends radially outward.

[0106] With this, when a key change operation is performed, the sphere 93 rolls on the tapered surface 95a of the lower pin hole 95, and can move smoothly toward the upper pin hole 97 in conjunction with the rotation of the inner cylinder 2. Therefore, the inner cylinder 2 can rotate smoothly during the key change operation.

[0107] In the cylinder locks 1, 1A of this embodiment, a concave spherical surface 923 is formed on a radially inner tip end surface 92a of the upper pin 92.

[0108] According to this, the contact surface of the upper pin 92 with the sphere 93 is formed by the concave spherical surface 923, so that the sphere 93 is naturally guided to press against the central axis of the upper pin 92. Therefore, when the upper pin 92 moves, the upper pin 92 does not rattle within the upper pin hole 97, and can move smoothly.

[0109] The cylinder lock 1, 1A of this embodiment is a cylinder lock 1, 1A comprising an inner tube 2 having a keyhole 21 for inserting an unlocking key 100, 100A, an outer tube 3 into which the inner tube 2 is rotatably fitted, and a pin structure 90 arranged axially and constituting a key change mechanism 9 located across the sheer line between the inner tube 2 and the outer tube 3, and has a first pin structure row 900A and a second pin structure row 900B each formed by arranging a plurality of pin structures 90 at a predetermined pitch along the axial direction of the cylinder lock 1, 1A.

[0110] This allows the cylinder lock 1, 1A to be configured with a large number of key changes using multiple pin structures arranged in the first pin structure row 900A and the second pin structure row 900B, thereby improving convenience.

[0111] In the cylinder lock 1, 1A of this embodiment, the first pin structure array 900A and the second pin structure array 900B are arranged at diagonal positions sandwiching the keyhole 21, and are also arranged offset by half a pitch in the axial direction of the cylinder lock 1, 1A.

[0112] According to this, since the first pin structure row 900A and the second pin structure row 900B are arranged diagonally across the keyhole 21, the axial length of the cylinder lock 1, 1A is prevented from increasing even if the number of key changes is increased.

[0113] The building equipment group of this embodiment is a building equipment group consisting of multiple types of building equipment equipped with opening and closing members, and the multiple types of building equipment all have a cylinder lock 1, 1A in common, and the cylinder lock 1, 1A has an inner tube 2 having a keyhole 21 into which an unlocking key 100, 100A is inserted, an outer tube 3 into which the inner tube 2 is rotatably fitted, and a key change mechanism 9 arranged axially and located on either side of the sheer line between the inner tube 2 and the outer tube 3, and the same unlocking key 100, 100A can be used to lock and unlock any of the multiple cylinder locks 1, 1A with different axial lengths.

[0114] According to this, even if cylinder locks 1, 1A with different axial lengths are installed depending on the type of building equipment, the same unlocking key 100, 100A can be used to lock and unlock multiple types of building equipment, improving the convenience of the building equipment group. According to the building equipment group that is equipped with common cylinder locks 1, 1A that lock and unlock opening / closing members with the same unlocking key according to this embodiment, all cylinder locks in a building can be locked and unlocked with the same unlocking key, and even if the first unlocking key 100 is lost, the second unlocking key 100A can be changed and used immediately without replacing the cylinder lock, improving security and convenience.

[0115] In the building equipment group of this embodiment, multiple types of building equipment are arranged in multiple areas A1 to A4, each of which is divided into different sections.

[0116] This allows the same unlocking key 100, 100A to be used to lock and unlock multiple types of building equipment in each of the multiple areas A1 to A4, further improving the convenience of the building equipment group.

[0117] In the group of building equipment of this embodiment, the multiple areas A1 to A4, which are different zones, have different security levels regarding people entering the areas A1 to A4.

[0118] This means that multiple types of building equipment can be locked and unlocked using a common unlocking key 100, 100A, but if the first unlocking key 100 to be used is lost, the next unlocking key 100A to be used can be used to disable the first unlocking key 100 from being used on the building equipment in all areas A1 to A4, so even if the security levels of each area A1 to A4 are different, the security provided by the cylinder locks 1, 1A is maintained.

[0119] The present disclosure includes a cylinder lock and a building equipment group according to the following aspects.

[0120] <Aspect 1> an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; A key change mechanism is disposed in the axial direction and is provided across a sheer line between the inner cylinder and the outer cylinder. A cylinder lock that can lock and unlock multiple cylinder locks with different axial lengths using the same unlocking key.

[0121] <Aspect 2> The key change mechanism is an upper pin hole provided along a radial direction of the outer cylinder; an upper pin accommodated in the upper pin hole so as to be movable in the radial direction; a biasing member that biases the upper pin radially inward; a lower pin hole provided to penetrate the inner cylinder along a radial direction; a lower pin that is accommodated in the lower pin hole so as to be radially movable and has a tip end that is arranged so as to be able to protrude into the keyhole; an intermediate body disposed between the upper pin and the lower pin; A cylinder lock as described in aspect 1, each having an intermediate body accommodating groove provided in the inner tube and positioned adjacent to the lower pin hole in the opposite direction to the rotation direction of the inner tube when unlocked.

[0122] <Aspect 3> A cylinder lock according to aspect 2, wherein the lower pin hole has a tapered surface at its opening to the outer peripheral surface of the inner cylinder, the diameter of the tapered surface gradually increasing radially outward.

[0123] <Aspect 4> A cylinder lock according to aspect 2 or 3, wherein a concave spherical surface is formed on the radially inner tip surface of the upper pin.

[0124] <Aspect 5> an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; A cylinder lock comprising: a pin structure that is axially arranged and that constitutes a key change mechanism, the pin structure being provided across a sheer line between the inner cylinder and the outer cylinder; A cylinder lock having a first pin structure row and a second pin structure row, each of which is formed by arranging a plurality of the pin structures at a predetermined pitch along the axial direction of the cylinder lock.

[0125] <Aspect 6> A cylinder lock as described in aspect 5, wherein the first pin structure row and the second pin structure row are arranged diagonally across the keyhole and are offset by half a pitch in the axial direction of the cylinder lock.

[0126] <Aspect 7> A building facility equipment group consisting of multiple types of building facility equipment equipped with opening and closing members, The plurality of types of building equipment are provided with a common cylinder lock, The cylinder lock is an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; a key change mechanism disposed in the axial direction across a shear line between the inner cylinder and the outer cylinder, A group of building equipment in which a plurality of cylinder locks having different axial lengths can be locked and unlocked with the same unlocking key.

[0127] <Aspect 8> The group of building equipment according to aspect 7, wherein the plurality of types of building equipment are arranged in a plurality of areas of different sections.

[0128] <Aspect 9> A group of building equipment according to aspect 8, wherein different areas of the section have different security levels with respect to human entry into the areas.

[0129] The cylinder lock of the present disclosure is not limited to the cylinder locks having two different axial lengths, such as the cylinder locks 1 and 1A described above. The cylinder lock may have three or more different axial lengths that can be locked, unlocked, and key-changed using a common unlocking key.

[0130] The cylinder lock of the present disclosure is not limited to a coaxial type having a keyhole 21 coaxially at the center. The cylinder lock may be an eccentric type having a keyhole 21 at a position eccentric to the central axis. [Explanation of symbols]

[0131] 1,1A Cylinder lock, 2 Inner cylinder, 20 Outer peripheral surface, 21 Keyhole, 3 Outer cylinder, 9 Key change mechanism, 90 Pin structure, 91 Lower pin, 91a Tip, 92 Upper pin, 923 Concave spherical surface, 93 Sphere (intermediate body), 94 Biasing member, 95 Lower pin hole, 96 Sphere accommodating groove (intermediate body accommodating groove), 97 Upper pin hole, 95a Tapered surface, 900A First pin structure row, 900B Second pin structure row, 100,100A Unlocking key, 200 Entrance door (building facility equipment), 400 Delivery box (building facility equipment), 500 Gate (building facility equipment)

Claims

1. an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; A key change mechanism is disposed in the axial direction and is provided across a sheer line between the inner cylinder and the outer cylinder. A cylinder lock that can lock and unlock multiple cylinder locks with different axial lengths using the same unlocking key.

2. The key change mechanism is an upper pin hole provided along a radial direction of the outer cylinder; an upper pin accommodated in the upper pin hole so as to be movable in the radial direction; a biasing member that biases the upper pin radially inward; a lower pin hole provided to penetrate the inner cylinder along a radial direction; a lower pin that is accommodated in the lower pin hole so as to be radially movable and has a tip end that is arranged so as to be able to protrude into the keyhole; an intermediate body disposed between the upper pin and the lower pin; 2. The cylinder lock according to claim 1, further comprising: an intermediate body accommodating groove provided in the inner cylinder and arranged adjacent to the lower pin hole in a direction opposite to the rotation direction of the inner cylinder when unlocked.

3. 3. The cylinder lock according to claim 2, wherein the lower pin hole has a tapered surface at an opening portion to the outer peripheral surface of the inner cylinder, the diameter of the tapered surface gradually increasing radially outward.

4. 4. The cylinder lock according to claim 2, wherein a concave spherical surface is formed on a radially inner tip surface of the upper pin.

5. an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; A cylinder lock comprising: a pin structure that is axially arranged and that constitutes a key change mechanism, the pin structure being provided across a sheer line between the inner cylinder and the outer cylinder; A cylinder lock having a first pin structure row and a second pin structure row, each of which is formed by arranging a plurality of the pin structures at a predetermined pitch along the axial direction of the cylinder lock.

6. 6. The cylinder lock according to claim 5, wherein the first pin structure row and the second pin structure row are arranged diagonally across the keyhole and are offset by half a pitch in the axial direction of the cylinder lock.

7. A building facility equipment group consisting of multiple types of building facility equipment equipped with opening and closing members, The plurality of types of building equipment are provided with a common cylinder lock, The cylinder lock is an inner cylinder having a keyhole into which an unlocking key is inserted; an outer cylinder that rotatably fits onto the inner cylinder; a key change mechanism disposed in the axial direction across a shear line between the inner cylinder and the outer cylinder, A group of building equipment in which a plurality of cylinder locks having different axial lengths can be locked and unlocked with the same unlocking key.

8. The group of building equipment according to claim 7 , wherein the plurality of types of building equipment are arranged in a plurality of areas each having a different partition.

9. The group of building equipment according to claim 8 , wherein the different areas of the section have different security levels with respect to human entry into the areas.

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