JP5142388B2 - Cylinder lock protector - Google Patents

Description

  The present invention relates to a cylinder lock protection device that can prevent the cylinder lock of a motorcycle or the like from being broken.

  Conventionally, in order to prevent a cylinder lock such as a two-wheeled vehicle from being tampered with and broken by insertion into a key hole of a scissor or a driver by a third party, for example, protection of the cylinder lock as disclosed in Patent Document 1 A device has been proposed. Such a protective device has a shutter slidable from a closed position where the key hole is closed to an open position where the key hole is open, and holds the shutter slidably between the open position and the closed position. And a magnet lock that closes and locks the key hole by holding the shutter in the closing position, and a magnet key that unlocks the magnet lock by the magnetism of the magnet.

According to the cylinder lock protection device, the key hole can be closed by performing an operation of pushing a part of the shutter protruding from the housing into the housing, and can be locked with the magnet lock at that position. In other words, an operation unit for setting the shutter to the closed position is formed, and the driver operates the operation unit to set the shutter to the closed position and cover the key hole to protect the cylinder lock. It is.
JP-A-11-44132

  However, in the conventional cylinder lock protection device, in order to operate the shutter in the closed position to the open position, it is necessary to operate the magnet key while inserting the magnet lock and unlock the magnet lock. There was a problem that the operation was troublesome. In particular, in darkness such as at night, there is a problem that the operation of inserting the magnet key through the magnet lock becomes difficult. Furthermore, it is expected that a third party for the purpose of theft and mischief will forcibly open the shutter in the locked state by applying an impact to the shutter with a hammer or the like.

  The present invention has been made in view of such circumstances, and when operating the shutter in the closed position to the open position, the unlocking operability of the shutter is improved and the unlocking is performed easily and smoothly. Another object of the present invention is to provide a cylinder lock protection device capable of improving the crime prevention effect by making the shutter locked state stronger.

  According to the first aspect of the present invention, the housing provided above the key hole of the cylinder lock, and movable between the closed position and the open position within the housing, the key hole is closed and opened at the closed position. A shutter that opens the key hole at a position, an urging means that constantly urges the shutter to the open position, a lock means that locks the shutter at the closed position and restricts the movement to the open position, and a driver Is capable of transmitting an authentication code, a receiving unit capable of receiving an authentication code from the transmitting unit in a non-contact manner when the transmitting unit is in close proximity, and receiving by the receiving unit Authentication means for authenticating whether the authentication code is authentic or not, and only when the authentication means authenticates that the authentic authentication code has been received, A cylinder lock protection device that releases the lock and moves the shutter from the closed position to the open position by the urging force of the urging means, wherein the lock means is engaged with the shutter in the closed position. There is provided engagement means that can move between a lock position that restricts the displacement of the shutter toward the open position and in a direction substantially perpendicular thereto, and a non-lock position where the engagement with the shutter is released. It is characterized by that.

  According to a second aspect of the present invention, in the cylinder lock protecting apparatus according to the first aspect, the locking means is composed of a solenoid capable of moving the plunger by energization, and the plunger is between the locked position and the unlocked position. The movable engagement means is formed.

  According to a third aspect of the present invention, in the cylinder lock protecting device according to the second aspect, the tip of the plunger has a protrusion protruding in a direction substantially perpendicular to the moving direction thereof, and matches the protrusion. A groove shape is formed in the shutter, and when the locking means is in the locked position, the protrusion is engaged with the shutter by being fitted into the groove shape.

  According to a fourth aspect of the present invention, in the cylinder lock protecting device according to the third aspect, the shutter locked by the locking means is turned on by pressing the shutter against the urging force of the urging means, An access switch for starting authentication by the authentication means is provided, and the groove shape is separated from the protrusion by the pressing operation, and the fitting between the protrusion and the groove shape is released.

  According to a fifth aspect of the present invention, in the cylinder lock protection device according to the third or fourth aspect, the plunger in the locked position is forcibly moved to the unlocked position to release the lock by the locking means. A release mechanism is provided, and the contact surface between the shutter groove shape and the protrusion of the plunger is an inclined surface facing each other, and the inclined surface is used as a cam in the process of forcibly moving the plunger to the unlocked position. The shutter is moved by the action, and the fitting between the protrusion and the groove shape is released.

  According to a sixth aspect of the present invention, in the cylinder lock protection device according to any one of the first to fifth aspects, the transmitting means includes a transponder built in a grip portion of an ignition key, and The authentication code is an ID code unique to the vehicle.

  According to the first aspect of the present invention, after authentication by the authentication means is performed by bringing the transmission means close to the reception means, the lock by the lock means is released on condition that a regular authentication code is received, and the shutter is released. Since the shutter can be moved from the closed position to the open position, when operating the shutter at the closed position to the open position, the unlocking operability of the shutter can be improved and the lock can be released easily and smoothly. it can.

  Furthermore, the locking means engages with the shutter in the closed position and regulates the displacement toward the opening position of the shutter and in the direction substantially perpendicular thereto, so that the shutter is locked more firmly and the crime prevention. The effect can be further improved.

  According to the invention of claim 2, the locking means is composed of a solenoid capable of moving the plunger by energization, and the plunger constitutes an engaging means capable of moving between the locked position and the unlocked position. Compared to the means for moving the means by a motor or the like, the entire cylinder lock protection device can be reduced in size.

  According to the invention of claim 3, the tip of the plunger has a protrusion protruding in a direction substantially orthogonal to the moving direction, and a groove shape matching the protrusion is formed in the shutter, and the locking means is locked. Since the protrusion is engaged with the groove shape at the position, the shutter can be engaged with the shutter. Therefore, the shutter can be locked more firmly with a simple configuration.

  According to the invention of claim 4, the shutter is locked by the locking means and is turned on by pressing the shutter against the urging force of the urging means, and the access switch for starting the authentication by the authentication means is provided. Since the groove shape is separated from the protrusion by the pressing operation, and the fitting between the protrusion and the groove shape is released, if the operation for starting the authentication is performed, the fitting between the protrusion and the groove shape is released at the same time. The operability can be further improved.

  According to the invention of claim 5, the forcible release mechanism for forcibly moving the plunger in the lock position to the non-lock position and releasing the lock by the lock means is provided, and the groove shape of the shutter and the projection of the plunger The contact surfaces are inclined surfaces facing each other, and in the process where the plunger is forced to move to the unlocked position, the inclined surface acts as a cam to move the shutter, and the fitting between the protrusion and the groove shape is released. Thus, the shutter can be forcibly set to the open position even when authentication by the authentication means cannot be performed due to a malfunction of the vehicle battery or other components.

  According to the invention of claim 6, the transmission means is composed of a transponder built in the holding part of the ignition key, and the authentication code is an ID code unique to the vehicle. It is possible to share the ID code and the authentication code of the immobilizer system that transmits the ID code and permits the engine start only when the ID code is genuine.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The cylinder lock protection device according to the present embodiment is provided above the key hole of the cylinder lock of the two-wheeled vehicle, and can protect the cylinder lock by allowing the key hole to be opened and closed from the outside. As shown in FIG. 9, the housing 1, the shutter 2, the solenoid 3 as the locking means, the access switch 4, the coil spring 5 as the urging means, the transponder 6 as the transmitting means, and the receiving means as the receiving means. It is mainly composed of an antenna 7 and authentication means 8.

  The housing 1 is provided above the key hole A of the cylinder lock S and constitutes the housing of the protection device. The housing 1 is formed with a through-hole 1a that allows the key hole A to be exposed to the outside substantially at the center, and an accommodating portion 1b that slidably accommodates the shutter 2. In the cylinder body constituting the cylinder lock S, a rotor R having a plurality of tumblers (not shown) is disposed and a key hole A is formed so that the ignition key IK (see FIG. 1) is inserted and removed. It is configured to be able to.

  The shutter 2 is movable between a closed position and an open position within the housing 1, and closes the key hole A at the closed position (see FIG. 10) and externally opens the key hole A at the open position (see FIG. 12). It will be open to the face. More specifically, the shutter 2 is slidable in the housing 1, and is in a closed position at one sliding end to close the key hole A and in an open position at the other sliding end. The key hole A is configured to be opened.

  Further, the shutter 2 has a recess 2b formed on the back side thereof, through which the tip of the plunger 3a (engagement means) can be inserted in the closed position, and an arm 2c that extends laterally and turns on the access switch 4. When the shutter 2 is slid (moved from the open position to the closed position), the recess 2b is positioned to face the plunger 3a of the solenoid 3.

  The solenoid 3 as a locking means is for restricting the movement to the open position by locking the shutter 2 at the closed position, and the plunger 3a can be moved up and down (up and down movement in FIG. 3) by energizing the coil 3c. It has. The plunger 3a regulates displacement in a direction (right direction in FIG. 3) toward the open position of the shutter 2 by engaging with the shutter 2 in the closed position and in a direction substantially perpendicular to the shutter 2 (up and down direction in the figure). The engaging means is movable between the locking position (the state shown in FIG. 3) to be engaged and the non-locking position where the engagement with the shutter 2 is released (the state where the coil 3 is moved downward by energizing the coil 3) doing.

  More specifically, as shown in FIG. 13, the tip of the plunger 3a has a protrusion 3aa protruding in a direction substantially orthogonal to the moving direction, and a groove shape E matching the protrusion 3aa has a shutter shape. 2 is formed in the concave portion 2b, and the solenoid 3 (locking means) is set to the lock position so that the projection 3aa is engaged with the groove shape E so that the shutter 2 can be engaged and locked. It is configured. Thus, when the protrusion 3aa is fitted in the groove shape E, the displacement of the shutter 2 in the direction toward the open position and in the direction substantially perpendicular thereto is restricted.

  As a result, when the shutter 2 is in the closed position, the plunger 3a is in a protruding state (locked position), and is locked by fitting the protrusion 3aa at the tip thereof into the groove shape E of the shutter 2 to open the shutter 2. While the engagement of the projection 3aa with respect to the groove shape E is released (see FIG. 14), the plunger 3a is retracted into the unlocked position (see FIG. 15), so that the shutter 2 is locked. It is configured to be released and allow movement from the closed position to the open position.

  However, as shown in FIG. 3, the plunger 3a is always urged upward by the spring 3b, and when the shutter 2 is in the open position, the plunger 3a is pushed to the back surface to enter the immersive position. When it reaches the closed position, it protrudes in the recess 2b formed on the back surface of the shutter 2 by the urging force of the spring 3b, and the projection 3aa at the tip fits into the groove shape E to lock (engage) the shutter 2. To get.

  The transponder 6 as a transmission means is portable for the driver and can transmit the authentication code wirelessly. The transponder 6 is built in the grip portion D of the ignition key IK and is mounted on the vehicle side as shown in FIG. Communication is possible with the antenna 7 (receiving means) provided. More specifically, the transponder 6 built in the grip portion D of the ignition key IK operates based on a radio signal transmitted from the antenna 7, and a signal (an authentication code and a vehicle-specific ID) that is a response to the radio signal. Code).

  However, the transponder 6 includes an antenna for receiving a radio signal transmitted from the antenna 7 side and transmitting information generated on the transponder 6 side, a high-frequency circuit for demodulating the received radio signal, An authentication code generating IC for controlling, an EEPROM comprising a nonvolatile storage means for storing information unique to the ignition key IK (that is, vehicle specific), a capacitor, and the like are arranged, and excited by radio waves from the antenna 7 side. In this way, power is supplied. That is, it does not have a power source such as a dry battery or a battery.

  An antenna 7 as a receiving means can receive an authentication code (ID code) from the transponder 6 in a non-contact manner when the transponder 6 is brought close together with the ignition key IK, as shown in FIG. It consists of a chip-like element mounted on a substrate 11 in the housing 1. The substrate 11 and the antenna 7 are disposed below the operation unit 12 formed on the front side of the housing 1 (on the right side in FIG. 5 and at a position close to the operation unit 12). The antenna 7 may be a coil-like one in addition to the chip-like one as described above.

  However, in the present embodiment, as described above, the power is supplied to the transponder 6 by being excited by the radio wave from the antenna 7 side, so that the antenna 7 and the transponder 6 are brought close to a very close position. Thus, the antenna 7 can receive the authentication code. The antenna 7 is electrically connected to the authentication means 8 and is configured to transmit the authentication code (ID code) received by the antenna 7 to the authentication code 8.

  The authentication means 8 is for authenticating whether or not the authentication code (ID code) received by the antenna 7 (reception means) is a legitimate one. As shown in FIG. The solenoid 3 is electrically connected. Thus, in the state where the shutter 2 is locked at the closed position, if the authenticating means 8 authenticates that a normal authentication code has been received, the plunger 3a of the solenoid 3 is immersed (lowered), and the unlocked position is reached. (See FIG. 15), the engagement with the shutter 2 is released and the lock is released. On the other hand, if the authentication means 8 does not authenticate the normal authentication code, the engagement (protrusion) by the plunger 3a. (The fitting state to the groove shape E of 3aa) is maintained and the lock is not released.

  That is, only when it is authenticated that the authentic authentication code is received by the authentication means 8, the lock by the solenoid 3 (lock means) is released, and the shutter 2 can be moved from the closed position to the open position. . The authenticating means 8 is electrically connected to an ECU 9 for controlling the engine of the motorcycle, and when the ignition key IK is rotated while being inserted through the key hole A, the authenticating means 8 Only when it is authenticated that the authentication code is received, the engine start is permitted.

  The coil spring 5 (biasing means) constantly biases the shutter 2 in the closed position to the open position. When the lock by the solenoid 3 (locking means) is released, the coil spring 5 is biased by the biasing force of the coil spring 5. The shutter 2 is configured to naturally move from the closed position to the open position. That is, when the shutter 2 is slid from the open position to the closed position, the coil spring 5 is pressed and compressed, and an urging force (an urging force toward the open position) can be obtained.

  Further, in the housing 1, the shutter 2 locked by the solenoid 3 (locking means) is further pressed and moved against the urging force of the coil spring 5, and authentication by the authentication means 8 is started. An access switch 4 is provided. More specifically, when the operation portion 12 is pressed by the protruding portion Da of the grip portion D, the shutter 2 moves in a direction against the urging force of the coil spring 5 in conjunction with the operation portion 12 as shown in FIG. The arm portion 2c extended from the shutter 2 presses the operation portion 4a of the access switch 4 to turn it on electrically, whereby authentication by the authentication means 8 is started.

  Furthermore, in the present embodiment, the housing 1 is formed with an LED 10 that lights and notifies that the authentication means 8 has authenticated that the authentication code is authentic. As a result, the driver can grasp whether or not the proper authentication code has been successfully received, and when the authentication code is received, the lock is released and the shutter 2 is released by the coil spring 5. Since it is in the open position, it can be determined whether or not the shutter 2 is in the open position even in the dark.

  The operation part 12 is arranged in the housing 1 while being urged by a spring 13, and has substantially the same shape as a projection Da formed integrally with the grip part D of the ignition key IK in plan view. That is, as shown in FIGS. 7 to 9, the projecting portion Da is applied to the operating portion 12 while gripping the gripping portion D, and is pushed in as it is to be pressed against the urging force of the spring 12. It is.

  On the other hand, an operation arm 12 a extends from the operation unit 12, and is assembled in contact with each other on the upper and lower surfaces while overlapping with the operation arm 2 a extending from the shutter 2. As shown in FIG. 6, the contact surfaces of the operation arm 12a of the operation unit 12 and the operation arm 2a of the shutter 2 are formed with inclined surfaces 12aa and 2aa, respectively, and these inclined surfaces 12aa and 2aa face each other. It is in a state. When the operating portion 12 is pressed against the urging force of the spring 13, the operating arm 12a moves downward in the figure, and the inclined surfaces 12aa and 2aa act as cams, so that the shutter 2 is coiled. The spring 5 is configured to move in a direction against the urging force of the spring 5.

  That is, the shutter 2 in the closed position (see FIGS. 10 and 13) is locked by fitting the projection 3aa at the tip of the plunger 3a into the groove shape E. 11 is applied to the operation portion 12 and pressed as it is, thereby moving the shutter 2 in the direction against the urging force of the coil spring 5 (left side in the drawing) as shown in FIG. The operation part 4a of the access switch 4 can be pressed by 2c.

  Further, in this state, as shown in FIG. 14, the groove shape E is separated from the protrusion 3aa and the fitting between the protrusion 3aa and the groove shape E is released. As shown in FIG. 12, the shutter 2 is moved to the open position by the urging force of the coil spring 5 as shown in FIG. Will be released.

  Further, in the present embodiment, there is provided a forcible release mechanism for forcibly moving the plunger 3a in the locked position to the unlocked position and releasing the lock by the solenoid 3 (locking means). As shown in FIG. 3, the forcible release mechanism includes a forcible operation unit 14 in which one end 14 a abuts on a convex portion 3 ac formed on the plunger 3 a and the other end 14 b is connected to the wire W.

  The forcible operating portion 14 is configured to move against the urging force of the spring 15 by pulling the wire W (moves downward in FIG. 3), so that even if the coil 3c is not energized. The plunger 3a can be forcibly moved to the unlocked position. The mechanism for pulling the wire W may be a rotor of a cylinder lock that is arranged separately from the protection device for the cylinder lock and can be rotated while inserting the ignition key IK, or the ignition key IK or the like. It is good also as an operation knob etc. which were arrange | positioned in the accommodation space (lower space of a sheet | seat) which can be unlock | released and open | released.

  On the other hand, in the present embodiment, as shown in FIG. 13, the contact surfaces of the groove shape E of the shutter 2 and the projection 3aa of the plunger 3a are inclined surfaces 2ba and 3ab facing each other, and as shown in FIG. In the process in which the wire W is pulled and the plunger 3a is forcibly moved to the unlocked position, the inclined surfaces 2ba and 3ab act as cams to move the shutter 2, and the projection 3aa and the groove shape E are fitted. Is configured to be solved.

Next, the operation of the cylinder lock protection device having the above-described configuration will be described.
First, at the time of parking, after the ignition key IK is removed from the key hole A, it is pushed and slid to the closed position while picking the convex portion 2a of the shutter 2 in the open position. In the process of sliding from the open position to the closed position, as shown in FIG. 4, the shutter 2 compresses the coil spring 5, and the shutter 2 that has reached the closed position is always on the open position side (right side in the figure). ). At this time, the arm portion 2c of the shutter 2 is in a position close to the operation portion 4a of the access switch 4, but does not press the operation portion 4a, and the access switch 4 is electrically turned off. It has become.

  When the shutter 2 reaches the closed position, as shown in FIG. 13, the protrusion 3aa at the tip of the plunger 3a of the solenoid 3 is fitted with the groove shape E of the shutter 2, and the sliding movement toward the open position is restricted. In addition to being locked, the shutter 2 covers the upper part of the key hole A and cannot enter a key or the like. As a result, it is possible to prevent a third party from tampering with another key or scissors inserted into the key hole A.

  Further, since the shutter 2 is engaged (locked) by fitting the projection 3aa of the plunger 3a into the groove shape E, in the locked state, of course, the movement (displacement) of the shutter 2 to the open position side is restricted. The movement (displacement) in the direction substantially perpendicular to the vertical direction (the vertical direction in FIG. 13) is also restricted by the contact of the inclined surfaces 2ba and 3ab. Therefore, the locked state of the shutter 2 can be made stronger, and even if a third party for the purpose of theft or mischief applies an impact to the shutter 2 with a hammer or the like, the lock is released. Can be suppressed.

  On the other hand, in order to slide the shutter 2 in the closed position to the open position so that the key hole A faces the outside, first, as shown in FIGS. Press operation. Thereby, the operation arm 12a of the operation unit 12 and the operation arm 2a of the shutter 2 function and cooperate as a cam, and the shutter 2 slightly slides against the urging force of the coil spring 5. As a result, the access switch 4 is turned on, the vehicle including the immobilizer system is turned on, and authentication by the authentication means 8 is started. At this time, the LED 10 (notification means) is lit to notify the driver that the power source has been turned on.

  At the same time, when the operating portion 12 is pressed by the protruding portion Da of the gripping portion D and the shutter 2 slightly slides, the groove shape E is separated from the protrusion 3aa as shown in FIG. The fitting with the groove shape E is released. Further, by pressing the operation unit 12 with the protruding portion Da of the gripping part D, the transponder 6 and the antenna 7 in the gripping part D communicate wirelessly and authentication by the authentication unit 8 is performed. If the code is regular, the plunger 3a is moved to the unlocked position.

  As a result, the shutter 2 is unlocked. If the gripping part D and the projecting part Da are separated from the operation part 12 from this state, the shutter 2 is naturally moved from the closed position to the open position by the urging force of the coil spring 5. Moving. Thus, when the shutter 2 reaches the open position, the key hole A is exposed to the outside. Therefore, if the ignition key IK is inserted into the key hole A and rotated in a predetermined direction, the engine can be started and run. It becomes a state. However, even when the ignition key IK is inserted through the key hole A, communication is performed between the transponder 6 and the antenna 7, and an authentication code (ID code) is transmitted from the transponder 6 to the antenna 7. The authentication means 8 authenticates whether or not this authentication code (ID code) is a predetermined regular one, and the engine start is permitted only when it is a regular one.

  According to the above embodiment, by pressing the operating portion 12 with the protruding portion Da of the grip portion D, the transponder 6 (transmitting means) can be brought close to the antenna 7 (receiving means), and the authentication means 8 After the authentication is performed, the lock by the solenoid 3 (locking means) is released on the condition that a proper authentication code is received, and the shutter 2 can be moved from the closed position to the open position. When operating a certain shutter 2 to the open position, the operability of unlocking the shutter 2 can be improved and unlocking can be performed easily and smoothly compared to a conventional one using a magnetic lock.

  Further, the locking means engages with the shutter 2 in the closed position (specifically, the protrusion 3aa of the plunger 3a fits into the groove shape E of the shutter 2) and the direction toward the open position of the shutter 2 and Since the displacement in the substantially vertical direction is restricted, the locked state of the shutter 2 can be made stronger and the crime prevention effect can be further improved. As shown in FIG. 18, the contact surface between the groove shape E ′ of the shutter 2 and the protrusion 3 aa ′ of the plunger 3 a may be flat (the inclined surface is not formed as described above).

  Further, the locking means is composed of a solenoid 3 that can move the plunger 3a by energization, and the plunger 3a forms an engaging means that can move between a locked position and an unlocked position. The whole cylinder lock protection device can be reduced in size compared to the one moved by the. Further, the tip of the plunger 3a has a projection 3aa protruding in a direction substantially orthogonal to the moving direction, and a groove shape E matching the projection 3aa is formed in the shutter 2, and the locking means is in the locked position. When the projection 3aa is fitted into the groove shape E, the shutter 2 can be engaged with the shutter 2. Therefore, the shutter 2 can be locked more firmly with a simple configuration.

  The shutter 2 locked by the solenoid 3 (locking means) is turned on by pressing the shutter 2 against the urging force of the coil spring 5 (biasing means) (pressing operation via the operation of the operation unit 12), and the authentication means 8 Is provided with an access switch 4 for starting authentication, and the groove shape E is separated from the protrusion 3aa by the pressing operation so that the fitting between the protrusion 3aa and the groove shape E is released. If the operation to be performed (that is, the operation of pressing the operation portion 12 with the protruding portion Da) is performed at the same time, the fitting between the projection 3aa and the groove shape E is released, so that the operability can be further improved.

  Furthermore, a forcible release mechanism for forcibly moving the plunger 3a at the lock position to the unlock position to release the lock by the solenoid 3 (lock means) is provided, and the groove shape E of the shutter 2 and the protrusion of the plunger 3a are provided. The abutting surfaces with 3aa are inclined surfaces 2ba and 3ab facing each other, and in the process in which the plunger 3a is forced to move to the unlocked position, the inclined surfaces 2ba and 3ab act as cams to move the shutter 2, Since the projection 3aa and the groove shape E are disengaged from each other, the shutter 2 is forced even if the authentication means 8 cannot perform authentication due to a failure of the vehicle battery or other components. It can be in the open position.

  In addition, according to the present embodiment, the transmission means includes the transponder 6 built in the holding portion of the ignition key IK, and the authentication code is an ID code unique to the vehicle. The ID code unique to the vehicle is transmitted, and the ID code and the authentication code of the immobilizer system permitting the engine start can be shared (shared) only when the ID code is authorized.

  When the lock by the locking means comprising the solenoid 3 is released, the shutter 2 is moved from the closed position to the open position by the urging force of the urging means comprising the coil spring 5, so that the shutter 2 in the closed position is opened. It is not necessary for the driver to operate until a series of operability from unlocking to opening the keyhole A can be improved.

  Although the present embodiment has been described above, the present invention is not limited to this. For example, the operation unit 12 is not formed, and the shutter 2 in the closed position is directly operated, and the coil spring 5 (the biasing unit). It is good also as a structure which moves to the direction which resisted the urging | biasing force of (), and turns on the access switch 4. FIG. In that case, it is preferable that the shutter 2 is provided with a convex portion protruding upward so that the driver can pick and operate it during operation. Further, the antenna 7 and the access switch 4 as receiving means may be formed in a portion different from the housing 1 (for example, a handle switch fixed to a handlebar of a two-wheeled vehicle).

  Further, the transmission means that can be carried by the driver and can transmit the authentication code is not limited to the transponder that constitutes the immobilizer system as in the present embodiment, and is independent of other transmission means (for example, the ignition key IK). It may be a portable type. In this case, the present invention can also be applied to a vehicle that does not include an immobilizer system. Further, the present invention can be applied to a cylinder lock protection device in other vehicles such as a four-wheel vehicle, a buggy, and a snow vehicle in addition to a two-wheel vehicle.

  Between the locked position that engages with the shutter in the closed position and restricts the displacement of the shutter toward the open position and the direction substantially perpendicular thereto, and the unlocked position where the engagement with the shutter is released As long as the protection device for the cylinder lock is provided with an engaging means capable of moving the device, it can also be applied to a device having a different external shape or a device to which another function is added.

The perspective view which shows the protection apparatus of the cylinder lock which concerns on embodiment of this invention. Top view showing the cylinder lock protection device (shutter is closed) Sectional view taken along line III-III in FIG. IV-IV line sectional view in FIG. Sectional view taken along line VV in FIG. Sectional view taken along line VI-VI in FIG. The top view which shows the state which pressed and operated the operation part of the protection apparatus of the cylinder lock in the protrusion part of the holding part The side view which shows the state which pressed and operated the operation part of the protection apparatus of the cylinder lock in the protrusion part of the holding part IX-IX sectional view in FIG. The schematic diagram which shows the state which has the shutter in the closed position in the protection device of the cylinder lock The schematic diagram which shows the state which the shutter in the protection apparatus of the cylinder lock moved to the direction which resisted the urging | biasing force of the coil spring further from the obstruction | occlusion position. The schematic diagram which shows the state which has the shutter in the protection device of the cylinder lock in an open position The cross-sectional schematic diagram which shows the state which the plunger in the protection device of the cylinder lock was made into the locked position, and the protrusion was fitted in the groove shape Sectional schematic diagram which shows the state by which fitting with the protrusion of the plunger and groove shape in the protection device of the cylinder lock was cancelled | released Sectional schematic diagram showing a state in which the plunger in the protection device for the cylinder lock is in the unlocked position Sectional schematic diagram showing the process of forcibly moving the plunger to the unlocked position by the forcible release mechanism in the cylinder lock protection device Block diagram showing the cylinder lock protection device The cross-sectional schematic diagram which shows the state in which the plunger in the protection apparatus of the cylinder lock which concerns on other embodiment of this invention was made into a locked position, and the protrusion was fitted in the groove shape.

Explanation of symbols

1 Housing 2 Shutter 3 Solenoid (Locking means)
3a Plunger (engagement means)
3aa Projection 4 Access switch 5 Coil spring (biasing means)
6 Transponder (transmission means)
7 Antenna (Receiving means)
8 Authentication means 9 ECU
10 LED
11 Substrate 12 Operation part 13 Spring 14 Forced operation part (forced release mechanism)
15 Spring IK Ignition key D Gripping part Da Projection E Groove shape A Key hole S Cylinder lock

Claims (6)

A housing provided above the key hole of the cylinder lock;
A shutter that is movable between a closed position and an open position in the housing, closes the key hole at the closed position, and opens the key hole at the open position;
A biasing means for constantly biasing the shutter to the open position;
Lock means for locking the shutter in the closed position to restrict movement to the open position;
A transmission means for the driver to be portable and capable of transmitting an authentication code;
Receiving means capable of receiving the authentication code from the transmitting means in a non-contact manner when the transmitting means is approached;
Authentication means for authenticating whether or not the authentication code received by the receiving means is authentic;
And only when it is authenticated that the authentic authentication code is received by the authentication means, the lock by the lock means is released, and the shutter is moved from the closed position to the open position by the urging force of the urging means. A protective device for the cylinder lock to be moved,
The lock means is engaged with the shutter in the closed position and the engagement between the lock position for restricting displacement in the direction toward the open position of the shutter and the direction substantially perpendicular to the shutter is released. An apparatus for protecting a cylinder lock, comprising engagement means movable between a non-locking position.   2. A cylinder according to claim 1, wherein said locking means comprises a solenoid capable of moving a plunger by energization, and said plunger constitutes said engaging means capable of moving between a locked position and an unlocked position. Locking protection device.   At the tip of the plunger, there is a protrusion that protrudes in a direction substantially perpendicular to the moving direction, and a groove shape that matches the protrusion is formed in the shutter. When the locking means is in the locked position, the protrusion The cylinder lock protection device according to claim 2, wherein the cylinder lock protection device can be engaged with the shutter by fitting into the groove shape.   An access switch for turning on the shutter, which is locked by the locking means, by pressing it against the biasing force of the biasing means and starting authentication by the authentication means; 4. The protection device for a cylinder lock according to claim 3, wherein the shape is separated from the protrusion and the fitting between the protrusion and the groove shape is released.   A forcible release mechanism for forcibly moving the plunger in the locked position to the unlocked position and releasing the lock by the locking means; and abutting surfaces of the groove shape of the shutter and the protrusion of the plunger are mutually The inclined surface is opposed to each other, and in the process in which the plunger is forced to move to the unlocked position, the inclined surface acts as a cam to move the shutter, and the fitting between the protrusion and the groove shape is released. The cylinder lock protection device according to claim 3 or 4, wherein the protection device for a cylinder lock is provided.   6. The transmission device according to claim 1, wherein the transmission unit includes a transponder built in a grip portion of an ignition key, and the authentication code is a vehicle-specific ID code. Cylinder lock protector.

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