Cylinder lock protection device

Abstract

To avoid possible failure of a cylinder lock protection device including: an operating member supported by a casing for movement between a projecting position at which a tip portion of the operating member projects outward through a through hole in an outer wall of the casing and a pushed-in position at which the operating member is pushed in by a specified amount from the projecting position; and an interlocking drive mechanism for driving a shutter plate from an open position to a closed position in conjunction with the pressing operation of the operating member to the pushed-in position, the failure occurring in a case where a clearance between the operating member and the through hole of the outer wall of the casing is clogged with fine foreign matters, obstructing the operating member smoothly returning from the pushed-in position to the protruding position.SOLUTION: An operating member 41 has, on the outer surface of a tip portion 411 exposed to the outside of a casing 28 at a pushed-in position 41B, an engaged portion 41g with which another object T or the finger of a hand can be engaged so that the operating member 41 can be pulled back from the pushed-in position 41B to a protruding position 41A.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a protection device for a cylinder lock, which includes a casing having a mechanical key insertion hole for inserting a mechanical key into the cylinder lock, a shutter plate arranged in the casing so as to be operable between a closed position that closes the mechanical key insertion hole and an open position that opens the mechanical key insertion hole, an operation restriction mechanism that is switchable between a restricted state that restricts the shutter plate to the closed position and a released state that allows the shutter plate to operate from the closed position to the open position, and a release mechanism that can switch the operation restriction mechanism in the restricted state to the released state. [Background technology]

[0002] In the above-mentioned cylinder lock protection device, a device that includes a push-button-like operating member supported on the casing so as to be movable between a protruding position where its tip protrudes outside the casing through a through-hole in the outer wall of the casing and a pushed-in position where it is pushed in a predetermined amount from the protruding position, and a linked drive mechanism that drives the shutter plate from the open position to the closed position in conjunction with the operating member being pushed from the protruding position to the pushed-in position, has been publicly known (see, for example, Patent Documents 1 and 2 below).

[0003] In these conventional devices, when the shutter plate in the open position is moved toward the closed position, all that is required is to push in the operating member, the tip of which protrudes from the outer surface of the casing, while the shutter plate is in the open position.This means that there is no need to provide an arc-shaped opening in the casing through which the protrusion of the shutter plate can be inserted, which increases the freedom in designing the casing, and furthermore, since it is only necessary to consider the seal between the outer periphery of the operating member and the casing, there are advantages such as an advantageous dustproof and waterproof structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6187908 [Patent Document 2] Patent No. 4100928 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional device of Patent Document 1, the shutter plate operates toward the closed position in conjunction with the operation member for closing the shutter plate being pushed into the pushed-in position, and the operation restriction mechanism is switched to the restricted state, so that the operation member returns from the pushed-in position to the protruding position by the biasing force of the return spring. Also, in the conventional device of Patent Document 2, the operation restriction mechanism, which has entered the restricted state in conjunction with the operation member being pushed into the pushed-in position, is switched to the restricted release state by the release mechanism, so that the shutter plate operates from the closed position to the open position, so that the operation member returns from the pushed-in position to the protruding position by the biasing force of the return spring.

[0006] However, in the conventional devices of Patent Documents 1 and 2, there is a small annular clearance between the operating member for closing the shutter plate and the through-hole in the outer wall of the casing through which it passes. Therefore, in areas with a lot of dust, for example, small foreign objects (such as sand or dust) may become clogged in the clearance, hindering the operating member's return from the depressed position to the extended position. In this case, the device of Patent Document 2 has the problem of being unable to maintain the shutter plate in an open state if the operating member remains in the depressed position. Meanwhile, the device of Patent Document 1 has the problem of being able to maintain the shutter plate in an open state, but being unable to close the shutter plate if the operating member remains in the depressed position, making it easy for a third party to tamper with the cylinder lock.

[0007] The present invention has been made in view of the above circumstances, and has an object to provide a protection device for a cylinder lock that can solve the above problems of conventional devices. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a cylinder lock protection device comprising: a casing having a mechanical key insertion hole for inserting a mechanical key into a cylinder lock; a shutter plate disposed in the casing so as to be operable between a closed position that closes the mechanical key insertion hole and an open position that opens the mechanical key insertion hole; an operation restriction mechanism that can switch between a restricted state that restricts the shutter plate to the closed position and a released state that allows the shutter plate to operate from the closed position to the open position; and a release mechanism that can switch the operation restriction mechanism in the restricted state to the released state, wherein the protection device is provided with a through hole in the outer wall of the casing. The device comprises an operating member supported on the casing so as to be movable between a protruding position where its tip protrudes outward from the casing through a through hole and a pushed-in position where it is pushed in a predetermined amount from the protruding position, a return spring that biases the operating member toward the protruding position, and an interlocking drive mechanism that drives the shutter plate from the open position to the closed position in conjunction with the operating member being pushed from the protruding position to the pushed-in position, and the first feature of the device is that the operating member has an engaging portion on the outer surface of its tip that is exposed outside the casing when in the pushed-in position, which can be engaged with an object or a finger so as to pull the operating member back from the pushed-in position to the protruding position.

[0009] In addition to the first feature, the present invention has a second feature in that the engaged portion is a locking groove extending over the entire circumferential area or over a partial area of ​​the outer peripheral surface of the tip portion of the operating member.

[0010] In addition to the first feature, the present invention has a third feature in that the engaged portion is a locking protrusion or a locking step portion that extends circumferentially over the entire outer peripheral surface of the tip of the operating member or over a partial area thereof. [Effects of the Invention]

[0011] According to a first feature of the present invention, in a protection device for a cylinder lock, the protection device comprises an operating member supported on the casing so as to be movable between a protruding position in which its tip protrudes outside the casing through a through hole in the outer wall of the casing and a pushed-in position in which it is pushed in a predetermined amount from the protruding position, a return spring that biases the operating member toward the protruding position, and a linked drive mechanism that drives the shutter plate from the open position to the closed position in conjunction with the operating member being pushed from the protruding position to the pushed-in position, the operating member has an engageable portion on the outer surface of the tip that is exposed outside the casing when in the pushed-in position, which can be engaged with an object or a finger so as to pull the operating member back from the pushed-in position to the protruding position.

[0012] As a result, if fine foreign matter (such as sand or dust) becomes stuck in the clearance between the operating member for closing the shutter plate and the through hole in the outer wall of the casing, preventing the operating member from returning from the pushed-in position to the extended position, the operating member can be easily pulled out to the extended position by engaging the engaging portion on the outer surface of the tip of the operating member with another object or a finger, thereby making it possible to avoid problems that occur when the operating member remains in the pushed-in position with a simple structure.

[0013] According to the second feature of the present invention, the engaged portion is a locking groove that extends over the entire circumferential area or a partial area of ​​the outer peripheral surface of the tip of the operating member, so that the engaged portion can be easily formed by simply forming the locking groove on the outer peripheral surface of the tip of the operating member. Furthermore, since there is no need to provide an engaged portion on the tip surface of the operating member, there is no risk that the engaged portion will hinder the pushing operability.

[0014] According to the third feature of the present invention, the engaged portion is a locking projection or a locking step that extends over the entire circumferential area or a partial area of ​​the outer peripheral surface of the tip of the operating member, so that when the engaged portion is specially provided, it is sufficient to simply form the locking projection or the locking step on the outer peripheral surface of the tip of the operating member, which is easy to process. Furthermore, since it is not necessary to provide the engaged portion on the tip surface of the operating member, there is no risk that the engaged portion will hinder the pushing operability. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an overall perspective view showing a first embodiment of a protection device for a cylinder lock according to the present invention; [Figure 2] Perspective view of mechanical and magnetic keys [Figure 3] Exploded perspective view of the protection device [Figure 4] FIG. 1 is a front view of a protection device with a cover member omitted; [Figure 5] View from the arrow 5 in Figure 4 [Figure 6] FIG. 10 is a perspective view showing the relative arrangement of the shutter plate, the operating member, the operation restriction mechanism, and the release mechanism when the operation restriction mechanism is in a restricted state and the shutter plate is locked in the closed position. [Figure 7] A perspective view of a slide member [Figure 8] 7 is a perspective view corresponding to FIG. 6 when the release mechanism switches the operation restriction mechanism to the restriction release state. [Figure 9] 7 is a perspective view corresponding to FIG. 6 when the shutter plate is rotated to the open position. [Figure 10] 7 is a perspective view corresponding to FIG. 6 when the shutter plate is moved from the open position to the closed position in conjunction with the operation of pressing the operating member to the pressed position. [Figure 11] 11A and 11B are enlarged cross-sectional views of the main part of the casing-penetrating portion of the operating member, in particular, FIG. 11A is a cross-sectional view taken along line 11A-11A in FIG. 9, and FIG. 11B is a cross-sectional view taken along line 11B-11B in FIG. 10. [Figure 12] 12 is an enlarged cross-sectional view of a main part of the operating member according to the second embodiment, corresponding to FIG. 11, showing a casing penetration portion thereof; [Figure 13] 12 is an enlarged cross-sectional view of a main part of the operating member according to the third embodiment, corresponding to FIG. 11, showing a casing penetration portion thereof; DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0017] First, the first embodiment will be described with reference to Figures 1 to 11. In Figure 1, a protection device 13 is attached to a cylinder body 12 of a cylinder lock 11 used in a vehicle, such as a motorcycle, to enable switching of the switching mode of an ignition switch and switching between a locked state and an unlocked state of the steering.

[0018] In Figure 2, the mechanical key 14 for unlocking the cylinder lock 11 has a key plate 15 and a gripping portion 16 made of synthetic resin provided at one end of the key plate 15, and a magnetic key 17 is rotatably supported on the gripping portion 16 on the opposite side of the key plate 15.

[0019] The key body 18 of the magnetic key 17 is made of synthetic resin and is supported by the grip portion 16 via a shaft 19, allowing it to rotate between a storage position folded toward the grip portion 16 and an upright position protruding from the grip portion 16 toward the opposite side of the key plate 15 as shown in Figure 2.

[0020] One side of the key body 18 is formed with a square recess 20, a circular protrusion 21 located in the center of the recess 20, and four storage recesses 22 located within the recess 20 around the circular protrusion 21. The magnet key 17 is constructed by fitting and adhering a cover member 25 having a circular hole 24 in the center into which the circular protrusion 21 fits, to the recesses 20, with magnets 23 accommodated in three selected of the four storage recesses 22. The magnet 23 is accommodated in the storage recesses 22 with either its north pole or south pole facing the outer end of the storage recesses 22.

[0021] Referring also to Figures 3 to 5, the protection device 13 comprises a casing 28 that covers one end of the cylinder body 12 and has a mechanical key insertion hole 27 for inserting the mechanical key 14 into the cylinder lock 11, and a shutter plate 29 arranged in the casing 28 so as to be operable between a closed position that closes the mechanical key insertion hole 27 and an open position that opens the mechanical key insertion hole 27.

[0022] The casing 28 comprises a body 30 to which the cylinder body 12 is joined, and a cover member 31 fastened to the body 30 so as to cover the body 30 from the side opposite the cylinder body 12. The cover member 31 functions as the outer wall of the casing 28 that faces the occupant, and its front surface serves as the operation surface. The casing 28 is provided with a shutter plate 29 that can rotate in a rotation direction 32 shown by the arrow in Figure 4 between a closed position (position shown in Figure 4) that closes the mechanical key insertion hole 27 and an open position that opens the mechanical key insertion hole 27. The shutter plate 29 is disposed between the body 30 and the cover member 31.

[0023] The cover member 31 covers the body 30 by fitting into a portion of the body 30 opposite the cylinder lock 11, and is formed in an approximately rectangular bowl shape that is long in a direction perpendicular to the axis of the mechanical key insertion hole 27.

[0024] A first boss portion 31a is formed in the widthwise center of one longitudinal end portion of the cover member 31, and second and third boss portions 31b, 31c are integrally formed on both intermediate sides near the other longitudinal end of the cover member 31. Meanwhile, first to third support portions 30a, 30b, 30c that abut the first to third boss portions 31a, 31b, 31c are integrally formed on the outer periphery of the body 30, and a screw member 33 (see FIG. 3) is inserted into the first to third support portions 30a to 30c from the cylinder lock 11 side and screwed into the first to third boss portions 31a to 31c, thereby fastening the cover member 31 to the body 30.

[0025] The mechanical key insertion hole 27 is composed of a circular internal hole 34 provided in the body 30 so as to be able to communicate with the cylinder lock 11, and a circular external hole 35 provided in the cover member 31 corresponding to the internal hole 34, and the shutter plate 29 closes the mechanical key insertion hole 27 by being interposed between the internal hole 34 and the external hole 35.

[0026] A ring-shaped indicator sheet 36 is attached to the outer surface of the cover member 31, and this indicator sheet 36 indicates multiple rotation operation positions of the mechanical key 14 to be inserted into the mechanical key insertion hole 27 at intervals around the mechanical key insertion hole 27.

[0027] The casing 28 supports an operating member 41 that can be pressed in a direction parallel to the insertion direction of the mechanical key 14 into the mechanical key insertion hole 27. The cover member 31 of the casing 28 is provided with a through hole 42 having an axis parallel to the mechanical key insertion hole 27, and the through hole 42 is positioned diagonally above the mechanical key insertion hole 27 when the casing 28 is attached to the cylinder body 12 of the cylinder lock 11. The body 30 of the casing 28 is integrally formed with a support cylinder portion 43 that is coaxial with the through hole 42, and has an arc hole 44 that faces approximately half of the outer periphery of the support cylinder portion 43 on the mechanical key insertion hole 27 side.

[0028] In this embodiment, the operating member 41 is formed in a roughly cylindrical rod shape, and one end 411 (i.e., the tip) of this operating member 41 protrudes from the outer surface of the casing 28 at least when the shutter plate 29 is in the open position, and in this embodiment, one end 411 of the operating member 41 protrudes from the outer surface of the cover member 31 in the casing 28 regardless of the rotational position of the shutter plate 29.

[0029] One end 411 of the operating member 41 movably passes through the through-hole 42 of the cover member 31 via a small annular gap and protrudes from the outer surface of the cover member 31, and the other end 412 (i.e., the base) of the operating member 41 is slidably fitted into the support cylinder 43. Moreover, a pressing portion 45 disposed in the arc hole 44 is integrally connected to the other end 412 of the operating member 41 via a connecting arm 46 disposed in a slit 47 provided in the support cylinder 43 and extending in the axial direction, and the operating member 41 is supported by the casing 28 so as not to be able to rotate about its axis.

[0030] Thus, the operating member 41 is supported by the casing 28 so as to be movable between a protruding position 41A (see Figures 9 and 11(A)) where one end 411 (i.e., the tip) protrudes from the outer surface of the cover member 31, and a pushed-in position 41B (see Figures 10 and 11(B)) where it is pushed in a predetermined amount from the protruding position 41A.

[0031] A coil-shaped first spring 48 is compressed between the other end 412 of the operating member 41 and the body 30. The operating member 41 is biased by the spring force of the first spring 48 in a direction that causes one end 411 of the operating member 41 to protrude from the cover member 31, and the protruding position 41A is the limit of movement of the operating member 41 in the spring biasing direction of the first spring 48, and as is clear from Fig. 11(A) , this protruding position 41A is restricted by the pressing portion 45 abutting against the inner surface of the cover member 31. The first spring 48 functions as a return spring for the operating member 41, and specifically biases the operating member 41 toward the protruding position 41A (i.e., in the return direction).

[0032] Meanwhile, the operating member 41 has, on the outer surface of the one end 411 (i.e., the tip) exposed to the outside of the casing 28 at the pushed-in position 41B, a locking groove 41g as an engaged portion that can be engaged with another object or the fingers of the user's hand so that the operating member 41 can be pulled back to the extended position 41A if the returning operation of the operating member 41 from the pushed-in position 41B fails. Here, the "other object" may be anything other than the operating member 41 that can be held in the user's hand and used for the above-mentioned pulling back operation, and includes, for example, an implement T having a tapered portion (more specifically, a screwdriver, a key holder, etc.) or a string-like member.

[0033] In the embodiment, this locking groove 41g is configured as an annular groove extending around the entire outer peripheral surface of one end 411 (tip) of the operating member 41, but it may also be configured as a groove extending over a partial circumferential area of ​​the outer peripheral surface of the one end 411 (tip).

[0034] Thus, by providing this locking groove 411, as will be described later, if the operating member 41 fails to return from the pushed-in position 41B to the protruding position 41A, the operating member 41 can be pulled back to the protruding position 41A by engaging the locking groove 41g with another object (i.e., the instrument T or the string-like member) or the user's finger and pulling the operating member 41 in the protruding direction.

[0035] Furthermore, a sliding support portion 49 is protruded from the surface of the body 30 facing the back surface of the cover member 31, which allows the shutter plate 29 to slide against it when it rotates, and the sliding support portion 49 is formed so that a portion of the sliding support portion 49 is positioned above and below the internal hole 34 when the casing 28 is attached to the cylinder body 12.

[0036] The shutter plate 29 is integrally formed with a flat lid portion 29a that is interposed between the internal hole 34 and the external hole 35 and slides against the sliding support portion 49 while being capable of closing the mechanical key insertion hole 27, a support arm portion 29b that extends from the lid plate portion 29a toward the operating member 41, and a protrusion 29c that protrudes from the lid plate portion 29a on the side opposite to the support arm portion 29b.

[0037] Furthermore, a pressure-receiving portion 50 is integrally connected to the support arm portion 29b, and this pressure-receiving portion 50 is arranged in the arc hole 44 so as to face the pressing portion 45, which is integrally connected to the other end side of the operating member 41, in the circumferential direction of the operating member 41.

[0038] A support hole 51 is provided at the tip of the support arm portion 29b, through which the operating member 41 is inserted, and the shutter plate 29 is pivotally supported by the operating member 41 so as to be able to rotate between the closed position and the open position.

[0039] A second spring 52, which is a torsion spring that surrounds the operating member 41, is provided between the support cylinder portion 43 of the body 30 in the casing 28 and the shutter plate 29, and one end of this second spring 52 engages with a slit-shaped engagement hole 53 provided in the support cylinder portion 43, and the other end of the second spring 52 engages with the pressure-receiving portion 50 that is integrally connected to the support arm portion 29b of the shutter plate 29, and the shutter plate 29 is urged to rotate toward the open position by the spring force of the second spring 52.

[0040] Referring also to Figure 6, the protection device 13 is provided with an operation restriction mechanism 55 that can switch between a restriction state that restricts the shutter plate 29 to the closed position and a restriction release state that allows the shutter plate 29 to operate from the closed position to the open position, and this operation restriction mechanism 55 is composed of the protrusion 29c that is integral with the shutter plate 29, a restriction member 56 that can engage with the protrusion 29c from the open position side, and a coil-shaped third spring 57 that is compressed between the body 30 of the casing 28 and the restriction member 56.

[0041] The regulating member 56 is disposed on the opposite side of the operating member 41 with respect to the mechanical key insertion hole 27, and is integrally formed to have: a shaft portion 56a extending long in a direction parallel to the axial direction of the mechanical key insertion hole 27; a connecting arm portion 56b extending from the end of the shaft portion 56a on the cover member 31 side toward the mechanical key insertion hole 27; a disk portion 56c having an axis parallel to the shaft portion 56a and connected to the tip of the connecting arm portion 56b; a regulating protrusion 56d protruding from the disk portion 56c toward the mechanical key insertion hole 27 so as to be able to engage with the protrusion 29c of the shutter plate 29 from the open position side; and a first engaging protrusion 56e protruding in a direction different from the regulating protrusion 56d at the end of the shaft portion 56a on the opposite side from the cover member 31.

[0042] This regulating member 56 is supported by the body 39 of the casing 28 and is capable of moving in a direction parallel to the movement direction of the operating member 41 between a regulating position where the regulating protrusion 56d abuts against the protrusion 29c of the shutter plate 29 in the closed position to regulate the shutter plate 29 to the closed position, and a regulating release position where the abutment of the regulating protrusion 56d against the protrusion 29c is released to allow the shutter plate 29 to move from the closed position to the open position, and the third spring 57 exerts a spring force that urges the regulating member 56 toward the regulating position.

[0043] A slide support hole 58, which has a rectangular cross section and a bottom and is located below the mechanical key insertion hole 27 when the casing 28 is attached to the cylinder body 12, is provided in the body 30 so as to open facing the back surface of the cover member 31 and extend in a direction along the axis of the mechanical key insertion hole 27, and a rectangular insertion hole 60 corresponding to the slide support hole 58 is provided in the cover member 31. A guide hole 59, which guides movement of the restricting member 56 in a direction parallel to the axial direction of the mechanical key insertion hole 27, is provided in the body 30 by cutting out a part of the sliding support portion 49 and by being continuous with the slide support hole 58.

[0044] Referring to Figure 3, a lid member 61 that closes the insertion hole 60 from the inside is rotatably supported on the back surface of the cover member 31 via a support shaft 62, and this lid member 61 is biased in the closing direction by a fourth spring 63.

[0045] The protection device 13 also includes a release mechanism 65 that can switch the operation restriction mechanism 55 from a restricted state to a non-restricted state, and part of this release mechanism 65 is composed of a magnetic lock 66 that is unlocked by the magnetic key 17.

[0046] The magnetic lock 66 is disposed in the body 30 of the casing 28 and includes a rotor 67 rotatably supported by the body 30 of the casing 28 .

[0047] The rotor 67 is integrally formed of a non-magnetic material and has a circular dish-shaped portion 67a, a flange portion 67b that protrudes radially outward from the open end of the dish-shaped portion 67a, a connecting arm portion 67c that extends outward from one circumferential point on the flange portion 67b, and a second engaging protrusion 67d that protrudes from the outer end of the connecting arm portion 67c on the same side as the dish-shaped portion 67a.

[0048] The body 30 of the casing 28 is provided with a fitting recess 68 into which the flange portion 67b and the connecting arm portion 67c of the rotor 67 are rotatably fitted, a circular fitting hole 69 whose outer end opens in the fitting recess 68 and whose inner end opens on the side surface of the slide support hole 58 opposite the shutter plate 29, into which the dish-shaped portion 67a of the rotor 67 is rotatably fitted, and an elongated hole 70 whose outer end opens in the fitting recess 68 and whose inner end opens on the side surface of the slide support hole 58 opposite the shutter plate 29 so that the second engagement protrusion 67d can be inserted, and the elongated hole 70 is formed in an arc shape centered on the rotation axis of the rotor 67 to allow rotation of the rotor 67 within the fitting recess 68 and the fitting hole 69.

[0049] The fitting recess 68 has a support protrusion 71a integrally formed therewith that fits into the dish-shaped portion 67a of the rotor 67 to support the rotation of the rotor 67, and is closed by a cover member 71 that is fastened to the body 30 by a screw member 72, and an O-ring 73 is interposed between the base of the support protrusion 71a and the rotor 67.

[0050] A plurality of pins 74, for example three pins, made of magnets are slidably fitted to the tip of the support protrusion 71a, allowing them to move between a position where they engage with three of the four locking recesses 75 provided on the inner surface of the closed end of the dish-shaped portion 67a of the rotor 67 and a position where they disengage, and each pin 74 is resiliently biased in the direction of engaging with the rotor 67 by a fifth spring 76 (see Figure 3), which is an individually corresponding coil spring.

[0051] The three pins 74 are fitted into the locking recess 75 so as to be positioned corresponding to the three magnets 23 of the magnet key 17 when the magnet key 17 is placed facing the outer surface of the closed end of the dish-shaped portion 67a of the rotor 67. Moreover, the pins 74 are placed so that the same pole as the pole of the magnet 23 on the magnetic lock 66 side of the magnetic key 17 is positioned on the inner end side of the locking recess 75. By placing a regular magnet key 17 in a position facing the outer surface of the closed end of the dish-shaped portion 67a of the rotor 67, the pins 74 can be moved to the side that releases the engagement with the rotor 67 against the elastic force of the fifth spring 76, thereby allowing the rotor 67 to rotate.

[0052] A slide member 78 is slidably housed in the slide support hole 58 of the body 30 of the casing 28. The slide member 78 moves together with the key body 18 of the magnetic key 17 as the key body 18 is inserted into the insertion hole 60 of the casing 28, and the release mechanism 65 is composed of the magnetic lock 66, the slide member 78, a movable engagement member 79 housed in the slide member 78, and a sixth coil spring 80 provided between the slide member 78 and the movable engagement member 79.

[0053] 7, the slide member 78 includes a first side wall portion 78a that slides against the side surface of the slide support hole 58 on the shutter plate 29 side, a second side wall portion 78b that slides against the side surface of the slide support hole 58 opposite the shutter plate 29 and faces the first side wall portion 78a, a first connecting wall portion 78c that connects the first and second side wall portions 78a, 78b at one end in the longitudinal direction in the cross-sectional shape of the slide support hole 58, and a second connecting wall portion 78d that connects the first and second side wall portions 78a, 78b at the other end in the longitudinal direction in the cross-sectional shape of the slide support hole 58. The slide member 78 is formed integrally with a second connecting wall portion 78d that connects the first side wall portion 78a, the second side wall 78b, the first connecting wall portion 78c, and the second connecting wall portion 78d at the inner end side of the slide support hole 58, and this slide member 78 is formed with a bottomed magnet key insertion hole 81 having a substantially rectangular cross-sectional shape for opening the lid member 71 and inserting the key body 18 of the magnet key 17 through the insertion hole 60 of the cover member 31.

[0054] The tip of the key body 18 inserted into the magnetic key insertion hole 81 abuts against the end wall portion 78e, and by pushing the key body 18, the slide member 78 slides within the slide support hole 58. Moreover, a seventh coil spring 82 is compressed between the first and second connecting walls 78c, 78d of the slide member 78 and the closed end of the slide support hole 58, and the slide member 78 is spring-biased toward the cover member 31.

[0055] A window 83 is formed in the second side wall portion 78b of the slide member 78, allowing the magnetic key 17 inserted into the magnetic key insertion hole 81 to face the magnetic lock 66 side, and the slide member 78 moves together with the magnetic key 17 in response to the insertion of the key body 18, causing the magnetic key 17 to face the outer surface of the closed end of the rotor 67 of the magnetic lock 66, thereby not only enabling the magnetic key 17 to be inserted up to the unlocking position where the magnetic lock 66 is unlocked, but also allowing the key body 18 to be moved from the unlocking position to a pushed-in position by further pushing it in.

[0056] The second connecting wall portion 78d of the slide member 78 has an accommodation hole 84 through which the first engagement protrusion 56e integrally formed with the regulating member 56 and the second engagement protrusion 67d integrally formed with the rotor 67 can be inserted from both sides. The accommodation hole 84 is open toward the side of the slide support hole 58 facing the shutter plate 29 and the side opposite the shutter plate 29, while closing both ends of the slide support hole 58 in the extension direction, and the movable engagement member 79 and the sixth spring 80 are accommodated within the accommodation hole 84.

[0057] When the magnetic lock 66 is in the locked state, the movable engagement member 79 is held by the slide member 78 by engaging with the second engagement protrusion 67d of the rotor 67 while its movement is restricted by the rotor 67, and a sixth spring 80 is provided between the slide member 78 and the movable engagement member 79 so as to exert a resilient force that presses the movable engagement member 79 toward the side that rotates the rotor 67 in response to movement of the slide member 78 toward the pushed-in position, and the spring load of this sixth spring 80 is set greater than the spring load of the third spring 58.

[0058] The movable engaging member 79 is integrally formed with a movable engaging member main part 79a that is formed in a substantially C-shape that has an engaging groove 85 that engages with the second engaging protrusion 67d of the rotor 67 and that is open toward the connecting arm part 67c of the rotor 67, and a third engaging protrusion 79b that protrudes from the movable engaging member main part 79a so as to engage with the first engaging protrusion 56e of the regulating member 56 from the cover member 31 side. Also, a circular receiving recess 86 for receiving the end of the sixth spring 80 on the movable engaging member 79 side is formed in the movable engaging member main part 79a.

[0059] When the key body 18 of the genuine magnetic key 17 is inserted into the magnetic key insertion hole 81 of the slide member 78 and pushed in, the magnetic lock 66 is unlocked at the unlocked position, allowing the rotor 67 to rotate. When the slide member 78 is further pushed in together with the key body 18 from the unlocked position, the pressing force caused by the movement of the slide member 78 is transmitted to the connecting arm 67c of the rotor 67 via the sixth spring 80 and the movable engaging member 79. As shown in FIG. 8, the movable engaging member 79 moves and When the rotor 67 rotates, the third engagement protrusion 79b of the movable engagement member 79 engages with the first engagement protrusion 56e of the regulating member 56, which is biased toward the regulating position by the third spring 57, forcibly driving the regulating member 56 to the unrestricted position, and as shown in Figure 9, the engagement of the regulating protrusion 56d with the protrusion 29c of the shutter plate 29 is released, so that the restriction of the shutter plate 29 to the closed position by the regulating member 56 is released, and the shutter plate 29 moves to the open position by the spring biasing force of the second spring 52.

[0060] The protection device 13 also has an interlocking drive mechanism 88 provided between the operating member 41 and the shutter plate 29. When the shutter plate 29 is in the open position, the interlocking drive mechanism 88 presses the operating member 41, which is in the protruding position 41A, in a direction parallel to the insertion direction of the mechanical key 14 into the mechanical key insertion hole 27 from the protruding position 41A to a pushed-in position 41B where it is pushed in a predetermined amount, thereby driving the shutter plate 29 from the open position to the closed position in conjunction with the pressing operation.

[0061] In this embodiment, the interlocking drive mechanism 88 is composed of a pressing cam surface 89 formed on the pressing portion 45 integrally formed on the operating member 41 so as to face the other end side of the operating member 41 (the side opposite the cover member 31), and a pressure-receiving cam surface 90 formed on the pressure-receiving portion 50 integrally formed on the shutter plate 29 so as to face the pressing cam surface 89.

[0062] The pressure cam surface 89 is formed in a spiral shape so as to be positioned on one end side (cover member 31 side) of the operating member 41 as the shutter plate 29 moves toward the closed position in the rotation direction 32, and the pressure-receiving cam surface 90 is also formed in a spiral shape corresponding to the pressure cam surface 89, and when the shutter plate 29 is in the open position, the pressure cam surface 89 and the pressure-receiving cam surface 90 abut against or closely face each other, as shown in Figure 9.

[0063] In such an interlocking drive mechanism 88, when the operating member 41 is pressed while the shutter plate 29 is in the open position, as shown in Figure 10, the pressing force from the pressing cam surface 89 acts on the pressure-receiving cam surface 50, causing the shutter plate 29 to rotate toward the closed position.

[0064] When the shutter plate 29 rotates from the open position to the closed position, the protrusion 29c of the shutter plate 29 overcomes the regulating protrusion 56d of the regulating member 56, which is biased by the third spring 57 toward the regulating position. In order to facilitate this overtaking operation, an inclined surface 91 is formed on at least the open position side of the surface of the regulating protrusion 56d facing the cover member 31 along the rotation direction 32, which is inclined so that it becomes further away from the cover member 31 as it moves toward the open position. Also, an inclined surface 92, corresponding to the inclined surface 91, is formed on the surface of the protrusion 29c facing the opposite side to the cover member 31, which is inclined so that it becomes further away from the cover member 31 as it moves toward the open position.

[0065] Next, the operation of the first embodiment will be described. In this embodiment, the operating member 41, which can be pressed in a direction parallel to the insertion direction of the mechanical key 14 into the mechanical key insertion hole 27, is supported on the casing 28 so that one end 411 (i.e., the tip) of the operating member 41 protrudes from the outer surface of the cover member 31 of the casing 28 at least when the shutter plate 29 is in the open position, regardless of the operating position of the shutter plate 29 in this embodiment. An interlocking drive mechanism 88 is provided between the operating member 41 and the shutter plate 29, which drives the shutter plate 29 from the open position to the closed position in conjunction with the pressing of the operating member 41.

[0066] As a result, when the shutter plate 29 in the open position is moved toward the closed position, it is only necessary to push in the operating member 41, one end 411 of which protrudes from the outer surface of the casing 28, and there is no need to provide an arc-shaped opening in the casing 28 as in the past, which increases the degree of freedom in designing the casing 28 and, moreover, since it is only necessary to consider the seal between the outer periphery of the operating member 41 and the casing 28, it is also advantageous in terms of dustproof and waterproof construction.

[0067] In the first embodiment, the shutter plate 29 is pivotally supported by the operation member 41 so as to be rotatable between the closed position and the open position, allowing the shutter plate 29 and the operation member 41 to be arranged compactly together. Furthermore, the operation restriction mechanism 55 is switchable between a restricted state that restricts the shutter plate 29 to the closed position and a released state that allows the shutter plate 29 to operate from the closed position to the open position, and part of the release mechanism 65 that can switch the operation restriction mechanism 55 from the restricted state to the released state is made up of a magnetic lock 66 that is unlocked by the magnetic key 17, allowing the release mechanism 65 to be made compact.

[0068] In addition, in the first embodiment, when the operating member 41 is pushed to the pushed-in position 41B as shown in FIG. 10 from a state in which the shutter plate 29 is in the open position and the operating member 41 is in the protruding position 41A (see FIG. 9), the shutter plate 29 moves to the closed position as shown in FIG. 6 in conjunction with this and the operation restriction mechanism 55 is switched to the restriction state, and the operating member 41 automatically returns from the pushed-in position 41B to the protruding position 41A due to the biasing force of the first spring 48.

[0069] However, there is a small annular clearance between the operating member 41 and the through-hole 42 in the cover member 31 (i.e., the outer wall of the casing) through which it passes. Therefore, for example, in areas with a lot of dust, there is a risk that small foreign objects (such as sand or dust) will become clogged in the clearance, hindering the return movement of the operating member 41 from the pushed-in position 41B to the extended position 41A. In this case, even if the shutter plate 29 can be maintained in the open state, if the operating member 41 remains in the pushed-in position 41B, the shutter plate 29 cannot be closed by next pressing the operating member 41, which creates a problem in that it becomes easy for a third party to carry out an unauthorized attack on the cylinder lock 11.

[0070] In contrast, the operating member 41 of the first embodiment has, on the outer peripheral surface of one end 411 (i.e., the tip) exposed to the outside of the casing 28 at the pushed-in position 41B, a locking groove 41g as an engaged portion that can be engaged with another object (for example, the above-mentioned tool T such as a screwdriver or key holder, or a string-like member) or the user's fingers so that the operating member 41 can be pulled back to the protruding position 41A if the returning operation of the operating member 41 from the pushed-in position 41B fails. Therefore, if the returning operation of the operating member 41 from the pushed-in position 41B to the protruding position 41A fails, the operating member 41 can be pulled out to the protruding position 41B by engaging the locking groove 41g with another object (for example, the above-mentioned tool T or string-like member) or the user's fingers.

[0071] As a result, if small foreign matter becomes lodged in the clearance and the returning movement of the operating member 41 is hindered, the operating member 41 can be easily pulled out from the pushed-in position 41B to the protruding position 41A by hooking, for example, the tapered portion of the tool T as shown in Figure 11 (B) or a string-like member (not shown) or a finger (not shown) on the engaging portion, i.e., the locking groove 41g, on the outer surface of one end 411 (i.e., the tip) of the operating member 41, and therefore the above-mentioned problem of the operating member 41 remaining in the pushed-in position 41B and not returning can be avoided with a simple structure and operation.

[0072] Therefore, the shutter plate 29 can be accurately closed by pressing the operating member 41 at any time while the shutter plate 29 is maintained in the open position, thereby reliably preventing unauthorized attacks on the cylinder lock 11 by third parties.

[0073] Furthermore, the engaged portion for pulling back the operating member 41 is configured by the locking groove 41g provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, so that when providing the engaged portion, it is only necessary to simply form the locking groove 41g on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, which improves workability. Also, since there is no need to provide an engaged portion on the tip surface of the operating member 41, there is no risk that the engaged portion will hinder the pushing operability.

[0074] 12 shows a second embodiment of the present invention. In the second embodiment, a locking protrusion 41t is provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, instead of the locking groove 41g of the first embodiment, and functions as an engaged portion for pulling back the operating member 41. In other words, if the returning operation of the operating member 41 is not working properly, the operating member 41 can be easily pulled out from the pushed-in position 41B to the protruding position 41A by engaging the locking protrusion 41t, which serves as an engaged portion, with another object (for example, the tool T or a string-like member) or a finger.

[0075] Since the structure of the second embodiment is the same as that of the first embodiment except for the engaged portion, the components of the second embodiment are simply given the same reference numerals as the corresponding components of the first embodiment, and further structural explanation will be omitted. Furthermore, the second embodiment can achieve basically the same effects as the first embodiment.

[0076] Moreover, in the second embodiment, the engaged portion for pulling back the operating member 41 is composed of a locking protrusion 41t provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, so when specially providing the engaged portion, it is sufficient to simply form the locking protrusion 41t on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, which makes it easy to process.

[0077] In the second embodiment, the locking protrusion 41t serving as the engaged portion is configured as an annular protrusion extending around the entire outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, but the locking protrusion 41t may be provided only in a partial circumferential area of ​​the outer peripheral surface of the one end 411.

[0078] 13 shows a third embodiment of the present invention. In the third embodiment, a locking step 41s is provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, instead of the locking groove 41g of the first embodiment, and functions as an engaged part for pulling back the operating member 41. In other words, if the returning operation of the operating member 41 is not working properly, the operating member 41 can be easily pulled out from the pushed-in position 41B to the protruding position 41A by engaging the locking step 41s, which serves as an engaged part, with another object (for example, the tool T or a string-like member) or a finger.

[0079] Since the structure of the third embodiment is the same as that of the first embodiment except for the engaged portion, the components of the third embodiment are simply given the same reference numerals as the corresponding components of the first embodiment, and further structural explanation will be omitted. Furthermore, the third embodiment can achieve basically the same effects as the first embodiment.

[0080] Moreover, in the third embodiment, the engaged portion for pulling back the operating member 41 is composed of a locking step 41s provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, so when specially providing the engaged portion, it is sufficient to simply form the locking step 41s on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, which makes it easy to process.

[0081] In the third embodiment, the locking step 41s serving as the engaged portion is configured as an annular step extending around the entire outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, but the locking step 41s may be provided only in a partial circumferential area of ​​the outer peripheral surface of the one end 411.

[0082] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design modifications can be made without departing from the present invention as set forth in the claims.

[0083] For example, part of the release mechanism may be configured as a cylinder lock, or the release mechanism may be configured to include an actuator that is operated by remote control.

[0084] Furthermore, in the above embodiment, as in Patent Document 1, an example was given of a protection device for a cylinder lock that is configured such that when the operating member 41 for closing the shutter plate is pushed to the pushed-in position 41B, the shutter plate 41 moves toward the closed position in conjunction with the shutter plate being pushed in, and when the operation restriction mechanism 55 is switched to the restriction state, the operating member 41 returns from the pushed-in position 41B to the protruding position 41A by the force of the first spring 48, but the mechanism of this return movement is not limited to the above embodiment.

[0085] For example, as in Patent Document 2, the present invention may be applied to a protection device for a cylinder lock configured such that, when the operation restriction mechanism (7a, 2aa) is put into a restricted state in conjunction with the pushing of the operating member (5) into the pushed-in position, the release mechanism (6) switches it to a non-restricted state, and the shutter plate (2) moves from the closed position to the open position, the operating member (5) returns from the pushed-in position to the extended position by the force of the return spring (4).

[0086] In the above embodiment, an engaged portion (e.g., locking groove 41g, locking projection 41t, locking step 41s) that can be engaged with an object (e.g., the tool T or the string-like member) or a finger to pull back the operating member 41 when the returning operation of the operating member 41 from the pushed-in position 41B fails is provided on the outer peripheral surface of one end 411 (i.e., the tip) of the operating member 41, but the location of the engaged portion on the operating member 41 is not limited to the embodiment. For example, an engaged portion that can be engaged with an object (e.g., the tool T or the string-like member) or a finger to pull back the operating member 41 may be provided on the tip surface (i.e., the pressing surface) of the operating member 41. In this case, if the engaged portion is provided particularly on the outer peripheral edge of the tip surface (pressing surface) of the operating member 41 or in the vicinity thereof, there is no risk that the engaged portion will get in the way when the operating member 41 is pushed back. [Explanation of symbols]

[0087] T... Instruments as Other Things 11. Cylinder lock 14···Mechanical key 17. Magnetic key 27 Mechanical key insertion hole 28 Casing 29. Shutter plate 31 Cover member as the outer wall of the casing 41 Operating member 411 One end portion as the tip of the operating member 41g, 41t, 41s: Locking groove, locking projection, locking step portion as engaged portion 41A, 41B...Protruding position, pushing position 42...Through hole 48...First spring as a return spring 55 Operation restriction mechanism 65...Release mechanism 88... Interlocking drive mechanism 66···Magnetic lock

Claims

1. A cylinder lock protection device comprising: a casing (28) having a mechanical key insertion hole (27) for inserting a mechanical key (14) into a cylinder lock (11); a shutter plate (29) disposed in the casing (28) and operable between a closed position that closes the mechanical key insertion hole (27) and an open position that opens the mechanical key insertion hole (27); an operation restriction mechanism (55) switchable between a restricted state that restricts the shutter plate (29) to the closed position and a released state that allows operation of the shutter plate (29) from the closed position to the open position; and a release mechanism (65) that can switch the operation restriction mechanism (55) in the restricted state to the released state, an operating member (41) supported by the casing (28) so as to be movable between a protruding position (41A) where a tip portion (411) protrudes outward from the casing (28) through a through-hole (42) in an outer wall (31) of the casing (28) and a pushed-in position (41B) where the tip portion is pushed in a predetermined amount from the protruding position (41A); a return spring (48) that biases the operating member (41) toward the protruding position (41A); and an interlocking drive mechanism (88) that drives the shutter plate (29) from the open position to the closed position in association with the operating member (41) being pressed from the protruding position (41A) to the pushed-in position (41B), A cylinder lock protection device characterized in that the operating member (41) has, on the outer surface of the tip (411) exposed outside the casing (28) when in the pushed-in position (41B), an engaging portion (41g, 41t, 41s) that can be engaged with an object (T) or a finger so as to pull the operating member (41) back from the pushed-in position (41B) to the protruding position (41A).

2. The cylinder lock protection device described in claim 1, characterized in that the engaged portion is a locking groove (41g) extending over the entire circumferential area or over a partial area of ​​the outer peripheral surface of the tip portion (411) of the operating member (41).

3. A protection device for a cylinder lock as described in claim 1, characterized in that the engaged portion is a locking protrusion (41t) or a locking step (41s) extending over the entire circumferential area or over a partial area of ​​the outer peripheral surface of the tip portion (411) of the operating member (41).

Images