JP3708162B2 - Lock protector - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a protection device, and more particularly to a lock protection device capable of preventing unauthorized unlocking or tampering of the lock device by closing a key hole of the lock device.
[0002]
[Prior art]
For example, as shown in Japanese Examined Patent Publication No. 58-21065, a keyhole locking device for an automobile is known. This locking device has two opening / closing members that can be inserted in a closed state with the tip having a locking projection in a door key or start key hole of an automobile, and that the tips of each other can be opened and closed in a contact / separation direction. A device body is provided. The locking projections of the two opening / closing members are locked from the inside of the opening edge of the key hole in the closed state and prevented from coming off, and the open end of the opening / closing member of the locking device body is fixed by the locking means. When this lock device is fixed to the key hole, there is an advantage that the key cannot be inserted into the fixed key hole, and unauthorized parking can be prevented.
[0003]
Further, as shown in No. 3008407 registered utility model publication, a cylinder lock protection device that prevents destruction or theft by inserting a foreign object into a key hole of a cylinder lock provided in a vehicle is known. The cylinder lock protection device includes a lock plate and a guide plate that are inserted into a key cylinder of the cylinder lock. In the lock plate, the key portion is substantially halved in both the thickness and width of the predetermined key plate, and has a recess at the position of the tumbler in the key cylinder. A guide mechanism is provided that slides so that the key width in the key cylinder changes when the lock plate and the guide plate are overlapped and inserted into the keyhole of a predetermined key cylinder. The portion is locked in the tumbler groove of the key cylinder and locked at a predetermined position. In this manner, the protection device can be attached to the cylinder lock to prevent the cylinder lock from being destroyed or stolen.
[0004]
[Problems to be achieved by the invention]
By the way, in the cylinder lock protection device, when the guide plate and the key plate are inserted into the cylinder lock, a backlash occurs between the key hole of the cylinder lock and the guide plate and the key plate. There is a risk that the projection lock is released and the cylinder lock protection device falls off the cylinder lock, and the initial purpose of protecting the cylinder lock may not be achieved.
[0005]
It is an object of the present invention to provide a lock protection device that can be securely fitted without any play in the key hole of the lock device.
[0006]
[Means for achieving the object]
A lock protection device according to a first invention of this application includes a case having a recess and a cam wall portion, a rotor rotatably disposed in the case, a magnet tumbler slidably disposed in the rotor, and a magnet tumbler. A tumbler spring that presses into the recess of the case, a slider that is slidably arranged in the rotor in the radial direction and that abuts against the cam wall, and that is attached to the slider and protrudes outward from the case and into the key hole of the lock device And an engageable locking portion. When a regular key is brought close to the case, the magnet tumbler moves away from the concave portion of the case, and the cam wall moves the slider and the locking portion in the radial direction by the rotation of the case. Can be removed. A fixing projection that protrudes outward from the case is provided substantially in parallel with the locking portion. When the locking portion is engaged in the key hole, the fixing projection is inserted into the key hole. A pair of fixing protrusions are formed symmetrically with respect to the central axis. The case has a lid disposed to face the locking device, and the fixing protrusion protrudes outside the lid.
[0007]
A lock protection device according to a second invention of this application includes a case having a recess and a cam wall, a sleeve rotatably disposed in the case, a rotor rotatably disposed in the sleeve, and a sleeve A slidably disposed magnet tumbler, a tumbler spring that presses the magnet tumbler into the recess of the case, a rolling member that is disposed in the support hole of the sleeve and abuts against the cam wall, and slides radially in the rotor The slider includes a slider that can be arranged and abuts against the cam wall portion, and a locking portion that is attached to the slider and projects outward from the case and engages with a key hole of the lock device. When the case is rotated, the case and the sleeve are rotated relative to the rotor by the magnet tumbler. When a regular key is brought close to the case, the magnet tumbler moves away from the concave portion of the case, and the cam wall portion of the case moves in the radial direction via the rolling member by the rotation of the case, and locks. The locking portion can be removed from the key hole of the device. The fixing protrusion formed integrally with the rotor protrudes outward from the case substantially in parallel with the locking portion. When the locking portion is engaged in the key hole, the fixing protrusion is inserted into the key hole. A pair of fixing protrusions are formed symmetrically with respect to the central axis.
[0008]
[Action]
The fixing protrusion is fitted into the key hole of the lock device, and the lock protection device can be securely fixed to the lock device without any play. Once the lock protection device is fixed to the lock device, it is possible to prevent the lock protection device from being removed without using a regular key.
[0009]
【Example】
Embodiments of the lock protection device according to the present invention will be described below with reference to FIGS.
[0010]
First, FIGS. 5 to 17 show a first basic configuration example of the present invention for preventing the rotation of the rotor with respect to the case at the time of locking. 5 to 17 includes a case 1 having a front wall 1a and a side wall 1b connected to the front wall 1a. On the inner surface of the front wall 1a of the case 1, there are formed a plurality of concave portions 10 formed at substantially equal angular intervals in the same circumferential shape. A cam wall portion 11 having a substantially V-shaped cross section is formed on the inner surface of the side wall 1 b of the case 1. The cam wall 11 may have a U-shaped cross section. In the case 1, a rotor 2 having a holder 12 is rotatably arranged. The holder 12 is provided with a plurality of holding holes 13 formed in the axial direction corresponding to the recesses 10 of the case 1, and the magnet tumbler 3 and the tumbler spring 4 are disposed in each holding hole 13. The tumbler spring 4 is pressed toward the concave portion 10 of the case 1. As shown in FIG. 10, a horseshoe-shaped depression 1 c is formed in the front wall 1 a of the case 1.
[0011]
In the slider hole 15 formed in the rotor 2, a pair of slider 5 is arrange | positioned so that sliding in radial direction is possible. The circular protrusions 5 a of the pair of sliders 5 are pressed radially outward toward the cam wall 11 of the case 1 by the slider spring 19. The locking portion 6 attached to the slider 5 protrudes outward from the case 1 and engages with a radial wall 32 of a key hole 31 provided in a lock device 30 such as a cylinder lock. The resin of the resin slider 5 is partially fixed to the hole 6 a formed in the metal locking portion 6, and the locking portion 6 is fixed to the slider 5. A washer 16 and a lid 17 constituting a part of the case 1 are fixed to the case 1 at the front portion of the case 1. The washer 16 is formed of an elastic member such as a rubber material and prevents backlash with the cylinder lock. As shown in FIG. 9, the lid 17 is fixed to the case 1 by a caulking portion 17 a. The locking device 30 is attached to the door panel 40, for example.
[0012]
The key 20 of FIG. 12 is provided with a plurality of magnets 21 on the same circumference facing the magnet tumbler 3 in the case 1. A projection 22 that fits into the recess 1c of the case 1 is formed on the surface of the key 20, and a metal plate 23 is bonded to the annular recess 24 formed on the back surface of the key 20 by an appropriate adhesive or heat welding. Is done. A protrusion 25 having the same shape as the protrusion 22 is formed on the back surface of the key 20, and the key 20 can be carried by fitting the protrusion 25 into the recess 1 c of the case 1. Each magnet 21 facing each magnet tumbler 3 has the same polarity as the magnet tumbler 3, and when the key 20 is approached, the magnet tumbler 3 is magnetized against the elasticity of the tumbler spring 4 by the same polarity of the magnet. It is moved in a direction away from 2. For this reason, the magnet tumbler 3 is detached from the concave portion 10 of the case 1, and the case 1 becomes rotatable relative to the rotor 2.
[0013]
In the above configuration, when the regular key 20 is brought close to the case 1 and the protrusion 22 of the key 20 is fitted into the recess 1c, the magnet tumbler 3 is moved into the case as shown in FIGS. In this state, the case 1 and the rotor 2 can be rotated relatively apart from each other. When the case 1 is rotated together with the regular key 20 in this state, the case 1 is rotated relative to the rotor 2, and the cam of the case 1 as shown in FIGS. 6, 8, 16 and 17. The slider 5 and the locking part 6 can be moved in the radial direction by the rotation of the wall part 11, and the locking part 6 can be removed from the key hole 31 of the locking device 30.
[0014]
When different types of keys are brought close to the case 1, the magnet tumbler 3 is held in a state of being engaged with the recess 10 of the case 1, so that the case 1 and the rotor 2 cannot be rotated relatively. The stop 6 cannot be moved in the radial direction. In this embodiment, the holder 12 may be formed integrally with the rotor 2.
[0015]
18 to 30 show a second configuration example in which the case 1 freely rotates without moving the locking portion 6 in the radial direction when a different type key is used. 18 to 30, the same parts as those of the first configuration example shown in FIGS. 1 to 17 are denoted by the same reference numerals, and description thereof is omitted.
[0016]
As is apparent from FIGS. 18 to 30 showing the second configuration example, the sleeve 7 is rotatably arranged in the case 1, and the rotor 2 is further rotatably arranged in the sleeve 7. The magnet tumbler 3 accommodated in the holding hole 13 of the sleeve 7 together with the tumbler spring 4 is arranged to be slidable in the axial direction. A rolling member 25 such as a ball or a roller is disposed in the support hole 7 a of the sleeve 7. The rolling member 25 is in contact with the cam wall 11 of the case 1 and is in contact with the slider 5.
[0017]
Further, as shown in FIG. 21, the rotor 2 is formed with a spring hole 26 formed in the radial direction, and a ball spring 27 and a pair of balls 28 adjacent to both ends of the ball spring 27 are formed in the spring hole 26. Be placed. A V-shaped notch 29 is formed on the inner wall 7 a of the sleeve 7, and the ball 28 is pressed against the notch 29 by the elasticity of the ball spring 27.
[0018]
In the second configuration example, when the regular key 20 is moved close to the case 1 and rotated, the magnet tumbler 3 is separated from the recess 10 of the case 1 as shown in FIG. The rotor 2 can be rotated relatively. When the case 1 is rotated by rotating the regular key 20 in this state, the sleeve 7 and the rotor 2 are integrated by the ball 28 as shown in FIGS. 7 and the rotor 2, and the slider 5 and the locking portion 6 are moved in the radial direction via the rolling member 25 by the rotation of the cam wall portion 11 of the case 1. The locking part 6 can be removed from 31.
[0019]
When the case 1 is rotated without using a regular key, the magnet tumbler 3 remains fitted in the recess 10 of the case 1 as shown in FIG. Then, as shown in FIGS. 27 and 28 to 30, the case 1 and the sleeve 7 are rotated relative to the rotor 2 by the magnet tumbler 3, and the slider 5 and the locking portion 6 are moved in the radial direction. Can not. At this time, the ball 28 shown in FIG. 21 is moved radially inward against the elasticity of the ball spring 27, as shown in FIG. This is because when the regular key is used, the regular position can be detected by holding the sleeve 7 and the rotor 2 and fitting the ball 28 into the notch 29.
[0020]
In the invention of this application, a pair of fixed projections 50 projecting outward from the case 1 substantially integrally with the locking portion 6 shown in FIGS. The fixing protrusion 50 can be added to the configuration examples shown in FIGS. The rotor 2 and the key cylinder are formed by, for example, zinc die casting, and the fixing protrusion 50 is formed symmetrically with respect to the central axis with an accuracy of about 5/100 mm or less with respect to the dimension of the key hole 31. Further, as shown in FIG. 2, the fixed protrusion 50 has substantially the same width as the locking portion 6, and the side surface 50 a of the fixed protrusion 50 is on the same plane as the side surface of the locking protrusion 6. Further, the end face 50b of the fixing projection 50 is on the same plane as the end face in the height direction of the locking portion 6 or slightly higher, and the locking portion 6 does not protrude from the end surface 50b. The fixing protrusion 50 protrudes outside the washer 16 of the case 1 disposed to face the locking device 30. Therefore, when the fixing protrusion 50 is inserted into the key hole 31 of the locking device 30 together with the locking portion 6, the fixing protrusion 50 reduces backlash between the lock protection device and the locking device 30. Further, since the locking portion 6 is guided to the center of the key hole 31 by the fixing protrusion 50, it can be securely locked. Furthermore, a force against an attack from the outside can be received by the fixing protrusion 50, and the locking portion 6 does not come off. For this reason, the fixing protrusion 50 securely fixes the lock protection device at a proper position with respect to the lock device 30 without causing large backlash. Once the lock protection device is fixed to the lock device 30, it is possible to prevent the lock protection device from being removed from the lock device 30 without using a regular key.
[0021]
The examples shown in FIGS. 1 to 4 are applied to the examples shown in FIGS. 18 to 30, but the examples shown in FIGS. 1 to 4 may be applied to the examples shown in FIGS. 5 to 17. In this case, the pair of fixing protrusions 50 are formed integrally with the washer 16, the lid 17, or the rotor 2.
[0022]
The fixing protrusion 50 can also be applied to the prior art described in the 3008407 registered utility model publication. In this case, only one fixed projection 50 may be formed on the operable locking portion (guide plate) side.
[0023]
【The invention's effect】
As described above, the lock protection device according to the present invention is securely fixed to the key hole of the lock device without causing backlash at a normal position, and lock-protects the lock device without using a normal key. Since it is possible to prevent the device from being removed, it is possible to prevent the lock device from being broken, to reliably prevent unauthorized unlocking, and to improve the anti-theft effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which a lock protection device according to the present invention is mounted on a lock device. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 4 is a front view of the lock protection device according to the present invention. FIG. 5 is a cross-sectional view showing a state in which the lock protection device having the first configuration example is attached to the lock device. FIG. 7 is a cross-sectional view of the lock protection device provided with the first configuration example. FIG. 8 is a cross-sectional view of the lock protection device of the first configuration example showing the state removed from the lock device. 9 is a front view of a lock protection device provided with a first configuration example. FIG. 10 is a rear view of a lock protection device provided with a first configuration example. FIG. 11 is a lock protection device provided with a first configuration example. FIG. 12 is a front view of a key used for the first embodiment. FIG. 13 is a rear view of a key used in the lock protection device. FIG. 13 is a sectional view taken along line AA in FIG. 7. FIG. 14 is a sectional view taken along line BB in FIG. FIG. 16 is a sectional view taken along line AA in FIG. 8. FIG. 17 is a sectional view taken along line BB in FIG. 8. FIG. 18 is a second structural example having a free turn structure. FIG. 19 is a cross-sectional view of the lock protection device of FIG. 18 showing a state of being removed from the lock device. FIG. 20 is a cross-sectional view taken along line AA of FIG. FIG. 22 is a cross-sectional view taken along the line C-C in FIG. 18. FIG. 23 is a cross-sectional view taken along the line A-A in FIG. 19. FIG. FIG. 25 is a sectional view taken along the line CC in FIG. 19. FIG. 26 is a sectional view of the lock protection device of the second configuration example in a state where the different types of keys are approached. FIG. 27 is a cross-sectional view of the lock protection device of the second configuration example in a state in which the different types of keys are approached and rotated. FIG. 28 is a cross-sectional view taken along line AA in FIG. FIG. 30 is a cross-sectional view taken along line B-B of FIG. 27. FIG. 30 is a cross-sectional view taken along line CC of FIG.
1 .... Case, 1a ... Front wall, 1b ... Side wall, 2 .... Rotor, 3 .... Magnetic tumbler, 4 .... Tumbler spring, 5 .... Slider, 6 .... Locking part, 7 .... Sleeve, 10..Recess, 11..Cam wall, 12..Holder, 13..Holding hole, 14..Cover, 15..Slider hole, 20..Key, 25..Rolling member, 26..Spring Hole, 27 ... ball spring, 28 ball, 29, notch, 30 locking device, 31 key hole, 50 fixing lug,

Claims (5)

Case having a recess and a cam wall, a rotor arranged rotatably in the case, a magnet tumbler arranged slidably in the rotor, a tumbler spring for pressing the magnet tumbler into the recess of the case, and a rotor A slider that is slidably disposed in the radial direction in the slider and abuts against the cam wall, and a locking portion that is attached to the slider and protrudes outward from the case and engages in a key hole of the lock device,
When a regular key is brought close to the case, the magnet tumbler moves away from the concave portion of the case, and the cam wall moves the slider and the locking portion in the radial direction by the rotation of the case. In the lock protection device that can be removed,
Provide a fixed projection that protrudes outward from the case almost parallel to the locking part,
A lock protection device, wherein a fixing projection is inserted into a key hole when the engaging portion is engaged in the key hole. The lock protection device according to claim 1, wherein a pair of fixing protrusions are formed symmetrically with respect to the central axis. The lock protection device according to claim 1, wherein the case has a lid disposed to face the lock device, and the fixing protrusion protrudes outside the lid. A case having a recess and a cam wall, a sleeve rotatably arranged in the case, a rotor rotatably arranged in the sleeve, a magnet tumbler slidably arranged in the sleeve, and a magnet tumbler A tumbler spring that presses into the recess of the case, a rolling member that is disposed in the support hole of the sleeve and that abuts against the cam wall, a slider that is slidably disposed in the rotor in the radial direction and abuts against the cam wall, A locking portion that is attached to the slider and protrudes outward from the case and engages in the key hole of the locking device;
When the case is rotated, the case and sleeve rotate relative to the rotor by the magnet tumbler,
When a regular key is brought close to the case, the magnet tumbler moves away from the concave portion of the case, and the cam wall portion of the case moves in the radial direction via the rolling member by the rotation of the case, and locks. In the lock protection device that can remove the locking portion from the key hole of the device,
The fixing protrusion formed integrally with the rotor is projected outward from the case substantially in parallel with the locking portion,
A lock protection device, wherein a fixing projection is inserted into a key hole when the engaging portion is engaged in the key hole. The lock protection device according to claim 4, wherein a pair of fixing protrusions are formed symmetrically with respect to the central axis.

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