Crescent Tablets

Abstract

To provide a thin and slim dial-type crescent lock, which allows a personal identification number to be changed without using an operating tool. [Solution] The crescent lock 1 has an unlocking restriction member 9 that restricts the unlocking operation of the rotatable crescent, a locking member 15 that is interlocked with the sliding of the unlocking restriction member 9, and a dial lock 10 equipped with multiple operating dials. When the locking member 15 is in the upper limit dial operation restriction position, the locking member 15 prevents the rotation of the operating dials 11 and 12, keeping the dial lock 10 in a locked state. The dial lock 10 is configured so that the PIN can be changed without using a pin-shaped operating tool or the like, and the PIN can only be changed to a different number by pinching the code change knob 18 and moving the unlock code change member 17 to a predetermined position.

Description

[Technical Field]

[0001] The present invention relates to a crescent tablet. [Background technology]

[0002] Crescent locks are known as locking devices that keep fittings such as sliding windows placed in building openings closed. Patent Document 1 discloses a conventional crescent lock.

[0003] The crescent lock in Patent Document 1 has a button lock unit with an operating button at the top and a rotatably attached crescent at the bottom. This crescent lock cannot be unlocked unless the secret code set in the button lock unit is entered. The button lock unit effectively prevents the crescent lock from being unlocked fraudulently.

[0004] However, the crescent lock in Patent Document 1 has a thick button lock section that protrudes when installed on a window or door frame, affecting the view from inside the building and potentially damaging the consistency and aesthetics of the exterior. Therefore, there is a need to slim down the PIN-type crescent lock without compromising its ability to prevent unauthorized unlocking.

[0005] In addition, the crescent lock in Patent Document 1 uses a pin-shaped operating tool that is inserted into the button lock to change the PIN. Because such operating tools can be lost and there is a risk of them being swallowed, there is a need for a new structure that allows the PIN to be changed without using an operating tool. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-097904 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above-mentioned problems of the prior art, the object of the invention of this application is to provide a thin and slim crescent lock with a function to prevent unauthorized unlocking. Another object of the invention of this application is to provide a crescent lock with a function to prevent unauthorized unlocking that allows the secret code to be changed without using an operating tool. [Means for solving the problem]

[0008] The above object is achieved by a crescent lock comprising a rotatable crescent, an unlocking restriction member movable between an unlocking restriction position that restricts the unlocking operation of the crescent and an unlockable position that allows the unlocking operation of the crescent, and a dial lock that has an operation dial for unlocking and holds the unlocking restriction member in the unlocking restriction position in the locked state and allows the unlocking restriction member to move to the unlockable position in the unlocked state, wherein the operation dial is positioned so that its rotation surface is approximately parallel to the mounting surface of the crescent lock.

[0009] In the above-mentioned crescent lock, multiple operating dials are provided, and the multiple operating dials are provided on different rotation axes and are each arranged so that they are approximately parallel to the mounting surface of the crescent lock.

[0010] In addition, the crescent lock has a locking member that is movable between a dial operation restricting position that prevents rotation of the operating dial and keeps the dial lock in an unlocked state, and a dial operation allowing position that allows rotation of the operating dial, and is arranged to be linked to the operation of the unlocking restricting member.

[0011] In addition, in the above-mentioned crescent lock, the operating dial has a code setting cam having an engagement groove into which an engagement piece protruding from the locking member can enter, and a dial portion that releasably engages with the code setting cam and rotates integrally with the code setting cam.

[0012] In addition, in the above-mentioned crescent lock, the locking member has an insertion hole through which the code setting cam can be inserted, and the locking member is arranged to be movable between the dial operation restricted position and the dial operation allowed position with the code setting cam protruding through the insertion hole.

[0013] In the crescent lock, the operating dial has a plurality of codes, including a code for unlocking the lock. The dial lock is configured so that the code for unlocking the lock can be changed to another code.

[0014] In addition, the crescent lock further has an unlock code change member that is operated when changing the unlock code to another code, and is configured so that the unlock code of the dial lock can be changed to another code only when this unlock code change member is moved to a specified position. [Effects of the Invention]

[0015] The crescent lock of the present invention has an operating dial arranged almost parallel to the mounting surface of the crescent lock, making it slimmer than the design of conventional PIN-input crescent locks. In other words, the parallel arrangement of the operating dial minimizes the thickness of the crescent lock, so it does not obstruct the view from inside the building or detract from the aesthetic appearance of the windows and doors.

[0016] Furthermore, when multiple operation dials are provided on a combination lock, these multiple operation dials are provided on different rotation axes and are positioned so that each is approximately parallel to the mounting surface of the crescent lock. This allows the crescent lock to be slimmed down even when multiple operation dials are provided on the crescent lock.

[0017] In addition, in the present invention, the locking member operates in conjunction with the operation of the unlocking restriction member. This interlocking allows the crescent lock to be unlocked only when the operating dial is set to the unlock position. This function effectively prevents unauthorized unlocking of the crescent lock and improves security.

[0018] Furthermore, in this invention, the operation dial and locking member work in conjunction with each other, and the combination lock and crescent lock can be unlocked only when the code setting cam is positioned in a predetermined position. This prevents erroneous operation and unauthorized unlocking, improving security.

[0019] In addition, in this invention, the code-setting cam protrudes through the insertion hole, thereby functioning as a guide for the movement of the locking member. This guide function allows the locking member, which is linked to the unlocking restriction member, to move smoothly between the dial operation restriction position and the dial operation permission position. Furthermore, the engagement piece of the locking member can smoothly enter and leave the engagement groove of the code-setting cam, allowing the crescent lock to be locked and unlocked smoothly and without delay.

[0020] Furthermore, the present invention allows the user to change the unlock code set on the combination lock to another code (any code selected by the user). This function allows the user to select a code based on their own preferences or memory, improving convenience.

[0021] Furthermore, in the present invention, the unlock code can only be changed when the unlock code change member is moved to a predetermined position. Because the unlock code can be changed only when certain conditions are met, unauthorized changes can be prevented, improving security. Furthermore, changing the unlock code is simple, as it only requires moving the unlock code change member. Furthermore, the unlock code can be changed without using a pin-shaped operating tool, which is essential in conventional technology, eliminating the risk of losing or accidentally swallowing the operating tool. [Brief explanation of the drawings]

[0022] [Figure 1] 1A and 1B are a plan view, a side view, and a rear view showing an example of a crescent lock of the present invention. [Figure 2] FIG. 2 is an exploded perspective view showing the main part of the crescent lock of FIG. 1. [Figure 3] 2 is a cross-sectional view showing the main part of the crescent lock of FIG. 1. The crescent is not shown. [Figure 4] FIG. 4 is a cross-sectional view showing the crescent lock shown in FIG. 3 in an exploded state. [Figure 5] 1A and 1B are a plan view and a side view showing the crescent lock body. [Figure 6] 10A and 10B are cross-sectional views showing states before and after sliding of a locking member interlocked with an unlocking restricting member. [Figure 7] 10A and 10B are plan views showing the state before and after sliding of the locking member interlocked with the unlocking restriction member. [Figure 8] Fig. 8(A) is a side view, a plan view, and a cross-sectional view of the operation dial. Fig. 8(B) is a side view, a plan view, and a cross-sectional view of the code setting cam that constitutes part of the operation dial. Fig. 8(C) is a side view, a bottom view, and a cross-sectional view of the dial portion that constitutes part of the operation dial. [Figure 9] Fig. 9(A) is a plan view showing a dial spring arranged in the crescent lock body, and Fig. 9(B) is a plan view showing the engagement relationship between the dial spring and the operating dial in the crescent lock body. [Figure 10] 10A and 10B are cross-sectional views showing the operation of the unlocking code changing member and the code setting cam when changing the unlocking code. DETAILED DESCRIPTION OF THE INVENTION

[0023] (Crescent lock configuration) First, the configuration of the crescent lock of this embodiment will be described with reference to the accompanying drawings.

[0024] The crescent lock 1 of this embodiment is a locking device for building fixtures such as sliding windows, and is mainly composed of a crescent lock mechanism unit located at the bottom of the crescent lock and a dial lock mechanism unit located at the top of the crescent lock.

[0025] The crescent lock mechanism includes a crescent 5 (see Figures 1 and 2) and a sliding plate-like unlocking restriction member 9 (see Figure 2) that can restrict the unlocking operation of the crescent 5. The unlocking operation of the crescent means rotating the crescent 5, which is in a locked state, in the unlocking direction.

[0026] As shown in Figure 2, the dial lock mechanism includes a dial lock 10 equipped with dial sections 81, 82, etc., a lock knob 33 for moving the unlocking restriction member 9 up and down, a plate-shaped lock member 15 that moves in conjunction with the up and down sliding of the unlocking restriction member 9, a plate-shaped unlocking code change member 17 that is operated to change the unlocking code of the dial lock 10, a back plate 23 attached to the crescent lock main body 21 that houses these components, and a screw 25 for fixing the back plate 23 to the crescent lock main body 21.

[0027] As shown in Fig. 1, the crescent 5 has an operating knob 7 for rotating the crescent, as in the prior art, and also has a rotation shaft that rotates integrally with the crescent inside the crescent lock body 21. The rotation shaft of the crescent 5 is not shown in Fig. 2.

[0028] The crescent 5 is rotatably mounted on the crescent lock body 21. As shown in Figures 2 and 3, the crescent lock body 21 is formed in a roughly box-like shape that is elongated in the vertical direction, and is fixed to the mounting surface of the crescent lock (the surface of the interior joint frame of the building fixture). The crescent lock body 21 is a case that houses the components of the lock, including the unlocking restriction member 9. The crescent lock body 21 rotatably supports the rotation shaft of the crescent 5. The rotation shaft of the crescent 5 is provided with a stopper that can come into contact with the lower end of the unlocking restriction member 9.

[0029] The crescent 5 is provided on the crescent lock body 21 so as to be rotatable between a "locked position" in which it is engaged with the crescent receiver and an "unlocked position" in which it is disengaged from the crescent receiver. The crescent receiver is fixed to the outer joint frame of the building fixture.

[0030] The unlocking restricting member 9 is provided so as to be able to slide up and down between an "unlocking restricting position" and an "unlockable position." When the unlocking restricting member 9 is in the lower limit "unlocking restricting position," the lower end of the unlocking restricting member 9 comes into contact with a stopper provided on the rotation shaft of the crescent 5, restricting the unlocking operation of the locked crescent 5. When the unlocking restricting member 9 is in the upper limit "unlockable position," the lower end of the unlocking restricting member 9 is separated from the stopper provided on the rotation shaft of the crescent 5, allowing the unlocking operation of the locked crescent 5.

[0031] As shown in Figures 3 and 4, a locking member 15, which will be described later, is connected to the unlocking restricting member 9. When the unlocking restricting member 9 slides up and down, the locking member 15 also slides up and down in conjunction with this. The unlocking restricting member 9 has a connecting portion 8 for connecting the locking member 15. The connecting portion 8 of the unlocking restricting member 9 is formed by bending the upper end portion of the unlocking restricting member into a substantially L-shape.

[0032] A lock knob 33 is connected to the unlocking restriction member 9, which is provided slidably within the crescent lock body 21. As shown in Figures 1 and 2, the lock knob 33 is provided on the outside of the crescent lock body 21 and is slidable up and down along the outer wall of the body. By pinching and raising or lowering the lock knob 33, the unlocking restriction member 9 within the crescent lock body 21 slides up and down in conjunction with this.

[0033] The combination lock 10 is provided with two rotatable operating dials 11 and 12 for unlocking. Although two operating dials 11 and 12 are provided in this embodiment, the number of operating dials is not particularly limited, and may be one, or may be three or more.

[0034] When the dial lock 10 is in the "locked state," it prevents the unlocking restriction member 9 from sliding upward toward the unlockable position, holding the unlocking restriction member 9 in the lowest unlocking restriction position. Therefore, in this state, the crescent 5 cannot be rotated in the unlocking direction. On the other hand, when the dial lock is in the "unlocked state," it allows the unlocking restriction member 9 to slide upward toward the unlockable position. Therefore, in this state, the crescent 5 can be rotated in the unlocking direction.

[0035] The operation dials 11 and 12 are each disposed within the crescent lock body 21 so that their rotation planes are approximately parallel to the mounting surface (surface of the inner locking frame) of the crescent lock 1. "Parallel" here means that, assuming the operation dials 11 and 12 are flat disks, the rotation plane of the disk is parallel to the mounting surface (surface of the inner locking frame) of the crescent lock 1. In other words, the operation dials 11 and 12 are disposed so that the rotation axes 41 and 42 of the operation dials 11 and 12 are approximately perpendicular to the mounting surface of the crescent lock 1.

[0036] As shown in Figure 5, the crescent lock body 21 is formed with rotation shafts 41 and 42 that rotatably support the operation dials 11 and 12, and recesses 43 and 44 in which the operation dials 11 and 12 are disposed. The rotation shafts 41 and 42 are located in the centers of the recesses 43 and 44. In this manner, in this embodiment, the two operation dials 11 and 12 are provided on different rotation shafts 41 and 42, and the rotation shafts are not coaxial.

[0037] The locking member 15 is a plate-like member provided so as to move in conjunction with the sliding of the unlocking restricting member 9. The locking member 15 is provided so as to be slidable in the vertical direction between a "dial operation restricted position" shown in Fig. 6 and Fig. 7(A) and a "dial operation permitted position" shown in Fig. 6 and Fig. 7(B). When the locking member 15 is in the upper limit "dial operation restricted position," the locking member 15 prevents the rotation of the operation dials 11 and 12. When the locking member 15 is in the lower limit "dial operation permitted position," the restriction on the operation dials 11 and 12 is released, allowing the operation dials 11 and 12 to be rotated.

[0038] As shown in Figure 6, the unlocking restricting member 9 described above is connected to the locking member 15. When the unlocking restricting member 9 slides up or down, the locking member 15 also slides up or down in conjunction with this. The locking member 15 has a connecting portion 14 for connecting the unlocking restricting member 9 located below it. The connecting portion 14 of the locking member 15 is formed by bending the lower end portion of the locking member 15 into a substantially U-shape. The unlocking restricting member 9 and the locking member 15 are connected via the connecting portions 8 and 14, so that the two slide in conjunction with each other.

[0039] As shown in Figures 2 and 7, the locking member 15 has insertion holes 61 and 62 through which code setting cams 71 and 72 of the operation dial 10, which will be described later, can be inserted. As shown in Figure 6, the locking member 15 is provided so as to cover dial portions 81 and 82 of the operation dials 11 and 12 with the code setting cams 71 and 72 protruding from the insertion holes 61 and 62. The insertion holes 61 and 62 of the locking member 15 function as guide holes that guide the locking member 15 in a predetermined direction when it slides in conjunction with the unlocking restricting member 9. As shown in Figures 6 and 7, the locking member 15 slides between a dial operation restricting position and a dial operation allowing position with the code setting cams 71 and 72 protruding through the insertion holes 61 and 62.

[0040] 2, the lock member 15 has protruding engagement pieces 63, 64 that can enter the engagement grooves 91, 92 of the code setting cams 71, 72, and these engagement pieces 63, 64 protrude toward the insertion holes 61, 62.

[0041] As shown in FIGS. 4 and 8, the operation dials 11 and 12 have code setting cams 71 and 72 having engagement grooves 91 and 92, and dial portions 81 and 82 that rotate integrally with the code setting cams 71 and 72.

[0042] The dial portions 81, 82 are disposed in recesses 43, 44 in the crescent lock body 21 in a state where they mesh with and are integrated with the code setting cams 71, 72. The dial portions 81, 82 are formed in an annular shape and have fitting holes 83, 84 on the inside for fitting the code setting cams 71, 72, and internal teeth 85, 86 that can mesh with external teeth 93, 94 of the code setting cams 71, 72. The dial portions 81, 82 are releasably meshed with the code setting cams 71, 72 and rotate integrally with the code setting cams.

[0043] The code setting cams 71, 72 have bearing holes 75, 76 for inserting the rotating shafts 41, 42 protruding from the crescent lock body 21, protrusions 77, 78 protruding upward through fitting holes 83, 84 of the dial portions 81, 82, engagement grooves 91, 92 formed at predetermined positions of the protrusions 77, 78, and external teeth 93, 94 that can mesh with the internal teeth 85, 86 of the dial portions 81, 82. The engagement grooves 91, 92 of the code setting cams 71, 72 can accommodate engagement pieces 63, 64 protruding from the locking member 15.

[0044] When the operating dials 11, 12 configured as described above are placed in the recesses 43, 44 of the crescent lock body 21, the dial portions 81, 82 are supported by the stepped portions 45, 46 of the crescent lock body 21. The code setting cams 71, 72 are supported by cam springs 95, 96, which will be described later, with the rotating shafts 41, 42 inserted into the bearing holes 75, 76.

[0045] 10(A) and 10(B), when the operating dials 11, 12 arranged on the crescent lock body 21 are pushed toward the cam springs 95, 96, the dial portions 81, 82 get caught on the step portions 45, 46, and only the code setting cams 71, 72 move sideways accompanied by elastic deformation of the cam springs 95, 96. Then, when the code setting cams 71, 72 pushed sideways are separated from the dial portions 81, 82, the engagement between the two is released, and the dial portions 81, 82 can be rotated relative to the code setting cams 71, 72.

[0046] As shown in Fig. 8, a plurality of codes including an unlock code (password information) are attached at equal intervals around the periphery of the dial units 81 and 82. The dial units 81 and 82 are rotatably provided with at least a portion of the codes exposed. In this embodiment, the numbers 0 to 9 are attached at equal intervals around the periphery of the dial units as an example of the codes.

[0047] When the operation dials 11 and 12 are rotated and the unlock code is positioned at a predetermined position, the dial lock 10 enters an unlocked state. In this embodiment, the user can select any code from among the multiple codes attached around the dial portions 81 and 82 and set it as the unlock code.

[0048] 1 and 5, the crescent lock of this embodiment is provided with unlock marks 27 and 28 that serve as marks for aligning the unlock code. When rotating the operating dials 11 and 12, the unlock code on the dial sections 81 and 82 is aligned with the unlock marks 27 and 28, and the dial lock 10 reaches the unlocked state.

[0049] When the operating dials 11, 12 are rotated to align the unlock code with the predetermined position (unlock marks 27, 28), the engagement grooves 91, 92 of the code setting cams 71, 72, which rotate integrally with the dial sections 81, 82, are positioned at predetermined positions, and the dial lock 10 reaches the unlocked state. In this state, as shown in Figure 7(B), the engagement grooves 91, 92 of the code setting cams 71, 72 face the engagement pieces 63, 64 of the locking member 15, so the engagement pieces 63, 64 of the locking member 15 can enter the engagement grooves 91, 92 of the code setting cams 71, 72, and the locking member 15, which is linked to the unlocking restricting member 9, can slide toward the dial operation restricting position.

[0050] The crescent lock 1 is also provided with a dial spring 35 for generating a clicking sensation when the lock is rotated. As shown in Figure 9, the dial spring 35 is provided so that its tip contacts the dial portions 81 and 82, and plays a role in generating a clicking sensation each time the operating dials 11 and 12 are rotated by a predetermined angle. The dial spring 35 is attached to an insert shaft 36 that protrudes from the crescent lock body 21. The outer peripheries of the dial portions 81 and 82 are formed with a continuous concave-convex shape that contacts the dial spring when the dial portions 81 and 82 are rotated, generating a clicking sensation.

[0051] In addition, as shown in Figure 2, the crescent lock 1 has a plate-shaped unlocking code change member 17 that is operated when changing the unlocking code, cam springs 95 and 96 for biasing the code setting cams 71 and 72, and a code change knob 18 for moving the unlocking code change member 17 in the direction of pressing the code setting cams 71 and 72, as components that enable the unlocking code to be changed.

[0052] As shown in Figure 10(A), the cam springs 95, 96 urge the sign-setting cams 71, 72 toward the dial portions 81, 82. As a result, the dial portions 81, 82 of the operation dials 11, 12 arranged in the recesses 43, 44 are maintained in mesh with the sign-setting cams 71, 72. The cam springs 95, 96 are attached to the rotary shafts 41, 42 that support the operation dials 11, 12, and are arranged in spring spaces 97, 98 around the bases of the rotary shafts. The spring spaces 97, 98 are recesses formed in the centers of the recesses 43, 44.

[0053] 10(B), the unlocking code change member 17 is a member for pushing the code setting cams 71, 72 in the axial direction against the biasing force of the cam springs 95, 96 so as to release the meshing state between the dial portions 81, 82 and the code setting cams 71, 72. The unlocking code change member 17 is provided on the locking member 15 so as to be able to press the upper ends of the code setting cams 71, 72 protruding from the insertion holes 61, 62 of the locking member 15.

[0054] The unlocking code change member 17 is movable between a "code change restricted position" shown in FIG. 10(A) and a "code change permitted position" shown in FIG. 10(B). When the unlocking code change member 17 is in the "code change restricted position" near the locking frame, the unlocking code cannot be changed. When the unlocking code change member 17 is pushed in to the "code change permitted position," the unlocking code can be changed to another code selected by the user. Therefore, in this embodiment, the code for unlocking the dial lock 10 can be changed to another code only when the unlocking code change member 17 is moved to the specified position (code change permitted position).

[0055] 2, a guide hole 16 is formed in the unlocking code change member 17 so that the unlocking code change member 17 moves toward the code changeable position when pushed in. An insert shaft 36 protruding from the crescent lock body 21 is inserted into the guide hole 16, and the unlocking code change member 17 moves up and down along the insert shaft 36.

[0056] When changing the unlocking code to another code selected by the user, the code change knob 18 is pinched and, as shown in Figure 10(B), the unlocking code change member 17 is pushed in against the biasing force of the cam springs 95, 96, thereby releasing the meshing state between the dial parts 81, 82 and the code setting cams 71, 72. Then, by rotating the dial parts 81, 82 in this state, the relative positions of the codes of the dial parts 81, 82 and the engagement grooves 91, 92 of the code setting cams 71, 72 are changed.

[0057] The code-changing knob 18 is attached to the unlocking code-changing member 17 as shown in FIG. 2, and is provided so as to protrude from the crescent lock body 21 as shown in FIG.

[0058] (Operation when locking the Crescent and dial lock) When the crescent 5 is rotated from the unlocked position to the locked position and engaged with the crescent receiver, the crescent 5 enters the locked state. Next, the lock knob 33 is pressed down to slide the unlocking restricting member 9 from the unlockable position toward the unlocking restricting position. When the unlocking restricting member 9 reaches the unlocking restricting position, the lower end of the unlocking restricting member 9 comes into contact with a stopper provided on the rotation shaft of the crescent 5, and the unlocking restricting member 9 prevents the rotation of the rotation shaft of the crescent 5. Therefore, unless the unlocking restricting member 9 is returned to the unlockable position, the unlocking restricting member 9 prevents the unlocking operation of the crescent 5 (rotation of the crescent 5 in the unlocking direction).

[0059] When the lock knob 33 is pressed down to slide the unlocking restricting member 9 from the unlockable position to the unlocking restricted position, the locking member 15 slides in conjunction with this movement from the dial operation restricting position ((A) in Figures 6 and 7) toward the dial operation permitted position ((B) in Figures 6 and 7). At this time, because the code setting cams 71 and 72 protrude from the insertion holes 61 and 62 of the locking member 15, the locking member 15 is guided by the insertion holes 61 and 62 toward the dial operation permitted position.

[0060] When the locking member 15 reaches the dial operation allowable position as shown in Figures 6 and 7(B), the engagement pieces 63, 64 of the locking member 15 are disengaged from the engagement grooves 91, 92 of the code setting cams 71, 72 that are part of the operating dials 11, 12, so that the constraint by the locking member 15 is released and the operating dials 11, 12 can be rotated freely.

[0061] Next, for security purposes, the operation dials 11, 12 are rotated to align a code different from the unlock code with the unlock marks 27, 28. This causes the engagement grooves 91, 92 of the code setting cams 71, 72, which rotate integrally with the dial portions 81, 82, to move out of their predetermined positions (the unlocked positions where the engagement grooves 91, 92 of the code setting cams 71, 72 face the engagement pieces 63, 64 of the locking member 15), preventing the engagement pieces 63, 64 of the locking member 15 from entering the engagement grooves 91, 92 of the code setting cams 71, 72 and preventing the unlocking restricting member 9 from being pushed back to the unlockable position. As a result, the unlocking restricting member 9 prevents the crescent 5 from rotating until the unlocking code of the operation dials 11, 12 is again aligned with the unlock marks 27, 28 and the unlocking restricting member 9 is pushed back to the unlockable position.

[0062] By the above operation, the crescent lock 1 is locked, and the locked state is locked by the dial lock 10 to ensure that unauthorized unlocking is prevented.

[0063] (The action of unlocking the combination lock and unlocking the Crescent) The operating dials 11, 12 are rotated to align the unlock codes of the operating dials 11, 12 with the unlock marks 27, 28. As a result, as shown in Figure 7(B), the engagement grooves 91, 92 of the code setting cams 71, 72, which rotate integrally with the dial portions 81, 82, are positioned at predetermined positions (unlock positions where the engagement grooves 91, 92 of the code setting cams 71, 72 face the engagement pieces 63, 64 of the locking member 15), and the engagement pieces 63, 64 of the locking member 15 can enter the engagement grooves 91, 92 of the code setting cams 71, 72.

[0064] Next, the lock knob 33 is pushed up to slide the unlocking restricting member 9 from the unlocking restricting position toward the unlockable position. When the unlocking restricting member 9 reaches the unlockable position, it separates from the rotation axis of the crescent 5, enabling the unlocking operation of the crescent 5 (rotation of the crescent 5 in the unlocking direction). Next, when the crescent 5 is rotated from the locked position to the unlocked position and removed from the crescent receiver, the crescent 5 reaches the unlocked state.

[0065] When the lock knob 33 is pushed up to slide the unlocking restricting member 9 from the unlocking restricting position to the unlocking possible position, the locking member 15 slides in conjunction with this movement from the dial operation permitted position to the dial operation restricted position, as shown in Figure 7(A). At this time, because the code setting cams 71, 72 protrude from the insertion holes 61, 62 of the locking member 15, the locking member 15 is guided by the insertion holes 61, 62 toward the dial operation restricted position, and the engagement pieces 63, 64 of the locking member 15 enter the engagement grooves 91, 92 of the code setting cams 71, 72.

[0066] By the above operation, the dial lock 10 is unlocked and the crescent lock 1 is unlocked.

[0067] (Behavior when changing unlock code) The operation of changing the unlock code to another code selected by the user is performed when the crescent 5 is unlocked and the locking member 15 is in the dial operation restricted position ((A) in Figures 6 and 7). At this time, the engaging pieces 63 and 64 of the locking member 15 are inserted into the engaging grooves 91 and 92 of the code setting cams 71 and 72 of the operating dials 11 and 12, preventing the operating dials 11 and 12 from rotating.

[0068] When changing the unlocking code to another code selected by the user, the unlocking code change member 17 is moved from the "code change restricted position" shown in Fig. 10(A) to the "code change permitted position" shown in Fig. 10(B). That is, the sign change knob 18 is grasped and slid to move the unlocking code change member 17 (in the direction of pushing the code setting cams 71, 72 toward the spring spaces 97, 98) as shown in Fig. 10(B). At this time, the code setting cams 71, 72 protruding directly to the sides of the unlocking code change member 17 are pushed in together with the unlocking code change member 17 against the biasing forces of the cam springs 95, 96.

[0069] Then, the dial portions 81, 82 get caught on the stepped portions 45, 46, and only the sign setting cams 71, 72 move toward the spring spaces 97, 98 while the cam springs 95, 96 are elastically deformed. That is, only the sign setting cams 71, 72 are pushed into the spring spaces 97, 98, leaving the dial portions 81, 82 behind. As a result, the external teeth 93, 94 of the sign setting cams 71, 72 move away from the internal teeth 85, 86 of the dial portions 81, 82, and the meshing state between them is released.

[0070] On the other hand, the engagement pieces 63, 64 of the locking member 15 remain inserted into the engagement grooves 91, 92 of the code setting cams 71, 72 that have entered the spring spaces 97, 98, so the rotational movement of the code setting cams 71, 72 remains blocked by the engagement pieces 63, 64 of the locking member 15. Therefore, when the unlocking code change member 17 is pushed in to release the meshing state between the code setting cams 71, 72 and the dial portions 81, 82, it becomes possible to rotate only the dial portions 81, 82 while the code setting cams 71, 72 are constrained.

[0071] Next, while keeping the unlock code change member 17 pressed in (the state in which the code setting cams 71, 72 and the dial sections 81, 82 are disengaged), rotate the dial sections 81, 82 to align the unlock code selected by the user with the unlock marks 27, 28 on the crescent lock body.

[0072] Thereafter, when the sign change knob 18 is released, as shown in Figure 10(A), the elastically deformed cam springs 95, 96 return to their original shapes and press the sign setting cams 71, 72 in a direction that pushes them out of the spring spaces 97, 98. As a result, the urging forces of the cam springs 95, 96 cause the sign setting cams 71, 72 to mesh with the dial portions 81, 82 again, and the unlocking sign change member 17 is pushed up by the sign setting cams 71, 72 and returns to its original position (the sign change restricted position).

[0073] By the above operation, the unlock code selected by the user is stored in the code setting cams 71 and 72 of the operation dials 11 and 12, and the change of the unlock code is completed. [Explanation of symbols]

[0074] 1 Crescent Tablet 5 Crescent 7 Operation knob 8 Connecting part 9 Unlocking restriction member 10 Combination Lock 11,12 Operation dial 14 Connecting part 15 Locking member 16 Guide Hole 17 Unlock code change member 18 Sign change knob 21 Crescent lock body 23 Backboard 25 screws 27,28 Unlock mark 33 Lock knob 35 Dial spring 36 Inserted shaft 41,42 Rotation axis 43,44 Recess 45,46 Stepped section 61,62 Insertion holes 63, 64 Engagement piece 71,72 Sign setting cam 75,76 Bearing holes 77,78 Protrusion 81,82 Dial section 83,84 Fitting holes 85,86 Inner teeth 91, 92 Engagement groove 93,94 External teeth 95,96 Cam spring 97,98 Spring space

Claims

1. a rotatably provided crescent; an unlocking restricting member provided to be movable between an unlocking restricting position that restricts the unlocking operation of the crescent and an unlockable position that allows the unlocking operation of the crescent; The locking mechanism has an operation dial for unlocking, and a dial lock that holds the unlocking restriction member at an unlocking restriction position in a locked state and allows the unlocking restriction member to move to an unlockable position in an unlocked state. The operation dial is provided in plurality, The plurality of operation dials are provided on different rotation axes, and are arranged so that the rotation planes of the respective dials are substantially parallel to the mounting surface of the crescent lock. Crescent tablets characterized by:

2. The locking mechanism includes a locking member that is movable between a dial operation restricting position that prevents the rotation of the plurality of operation dials to hold the dial lock in an unlocked state and a dial operation allowing position that allows the rotation of the plurality of operation dials, and that is provided so as to be interlocked with the operation of the unlocking restricting member.

2. The crescent tablet according to claim 1.

3. The crescent lock described in claim 2, characterized in that the multiple operating dials have a code setting cam having an engagement groove into which an engagement piece protruding from the locking member can enter, and a dial portion that releasably engages with the code setting cam and rotates integrally with the code setting cam.

4. the locking member has an insertion hole through which the code setting cam can be inserted, the locking member is provided so as to be movable between the dial operation restricted position and the dial operation permitted position with the code setting cam protruding through the insertion hole.

4. The crescent tablet according to claim 3.

5. The plurality of operation dials are provided with a plurality of codes including a code for unlocking, The combination lock is configured so that the code for unlocking can be changed to another code.

2. The crescent tablet according to claim 1.

6. The crescent lock further has an unlock code change member that is operated when changing the unlock code to another code, The code for unlocking the dial lock can be changed to another code only when the unlock code changing member is moved to a predetermined position.

6. The crescent tablet according to claim 5.

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