JP4512922B2 - Cylinder lock - Google Patents

Description

  The present invention relates to a cylinder lock that locks and unlocks a vehicle door lock device, and more particularly to a cylinder lock that can prevent unauthorized release of the lock device.

  A cylinder lock is generally coupled to a housing fixed to a base body such as a vehicle body and having an engagement groove, a rotor having an immersible tumbler rotatably provided in the housing, and a small diameter portion of the rotor and a locking device. It is roughly constituted by a linked unlocking member. In this configuration, when a proper key is inserted and the rotor is rotated, the tumbler is immersed in the outer peripheral surface of the rotor, and the rotor rotates in the housing. Therefore, the unlocking member also rotates together with the rotor, and the locking device can be locked and unlocked via a transmission member such as a rod.

  On the other hand, when an unauthorized key or an unauthorized instrument is inserted into the cylinder lock, the tumbler protruding from the rotor remains engaged with the engaging groove of the housing, and the rotor does not rotate and unauthorized release of the locking device is prevented. . However, if the rotor is forcibly rotated as it is, the tumbler engaged with the engaging groove of the housing may be damaged, and the rotor device may be illegally released.

Therefore, a rotor case that is cylindrical and is provided in a fixed state, and a sleeve that is cylindrical and is provided rotatably inside the rotor case, and has a tumbler engaging groove and an axially extending guide groove. A key rotor which is rotatably provided inside the sleeve, has a key insertion hole formed in the axial direction, a tumbler-arranged groove formed in the radial direction, and an engagement portion at the rear, and the engagement portion And a rear portion of the key rotor that is movably engaged in an axial direction between an engagement position and an engagement release position, and is engaged at the engagement position. A lock lever that is engaged with the engagement portion and rotated by the key rotor, and is movably disposed in the tumbler-arranged groove in a radial direction and is urged to move in one direction by a spring member, before the key is inserted. In the state, one end is tumbler A tumbler that protrudes from the placement groove and engages with the tumbler engagement groove and is accommodated in the tumbler placement groove by inserting a regular key, and is arranged to be movable in the axial direction in the guide groove of the sleeve, together with the sleeve A movable bar to be rotated, and provided on the inner peripheral portion of the rotor case corresponding to the movable bar, and the sleeve is rotated together with the key rotor in a state where the tumbler is engaged with the tumbler engaging groove. Accordingly, there is provided a cylinder locking device comprising: a cam groove that moves the lock lever to a rear engagement release position via a movable bar to release the engagement between the engagement portion and the engaged portion. It has been proposed (see Patent Document 1).
Japanese Patent No. 2881103

  In this configuration, when the key rotor is rotated with an illegal key, the sleeve rotates together with the key rotor. At this time, the movable bar provided in the guide groove of the sleeve moves by being pushed rearward by the cam groove provided in the rotor case, and the lock lever is pushed rearward by the movable bar, thereby engaging the key rotor and the lock lever. The match is released. This prevents unauthorized release of the locking device, but since the movable bar arranged in the guide groove of the sleeve is structured to slide in the axial direction, the length of the movable bar becomes long and inevitably In addition, the cylinder lock device is also increased in size and weight.

  The present invention has been made in view of the above problems, and by using a slide member that moves axially in the cylinder radial direction, the member itself can be reduced in size, and the cylinder lock body can also be reduced in size and weight. In addition, even if the rotor operated by an unauthorized key is set to a position other than the key insertion / removal position and the connection between the rotor and the connection member is left unconnected, normal operation can be performed by inserting and rotating a normal key. The present invention provides a cylinder lock that can prevent unauthorized release of a lock device that can be unlocked.

  For this reason, the present invention has a housing fixed to the base, a cylinder built in the housing, and a tumbler that can be retracted and engaged with the cylinder. A rotor rotating in the cylinder after being disengaged, a connecting member detachably fitted to the rotor, a connecting member rotatably engaged with the connecting member, and a transmission member connected to the locking device. An unlocking member that is coupled to the rotor, and a spring that urges the coupling member in a direction to fit the rotor, and a slide member provided between the housing and the cylinder serves to rotate the cylinder. Along with this, the cylinder moves inward in the cylinder radial direction, and the inclined surface formed on the slide member presses and displaces the connecting member against the spring to release the engagement between the rotor and the connecting member. A first said Rukoto.

  A second feature is that when the slide member moves inward in the cylinder radial direction, the slide member engages with the rotor in the rotational direction.

  In the above configuration, when the regular key is inserted into the rotor, the tumbler is immersed and the engagement between the cylinder and the rotor is released, and the unlocking member is also rotated by the rotation of the rotor, so that the normal unlocking operation is performed. It becomes possible.

  On the other hand, when an unauthorized key is inserted into the rotor and rotated, the tumbler is not immersed and rotates while the cylinder and the rotor are engaged. At this time, the slide member provided between the housing and the cylinder is moved inward in the cylinder radial direction by the cam structure provided in the housing, and is formed on the slide member at the same time as engaging with the rotor in the rotational direction. Since the inclined surface thus made presses and displaces the connecting member against the spring, the engagement between the rotor and the connecting member is released, and unauthorized release of the locking device can be prevented.

  According to the cylinder lock of the present invention, when the rotor is rotated by an unauthorized key operation, the slide member moves inward in the cylinder radial direction via the cam structure, and the inclined surface formed on the slide member is The connecting member is pressed and displaced against the spring to release the engagement between the rotor and the connecting member, thereby preventing the lock device from being illegally released.

  Moreover, since the slide member is provided between the housing and the cylinder and moves inward in the cylinder radial direction, the member can be reduced in size, and the cylinder lock body can also be reduced in size and weight. It has the effect.

  When the slide member moves inward in the cylinder radial direction, it engages with the rotor in the rotational direction, so that the rotor operated by an unauthorized key is set to a position other than the key insertion / removal position, and the rotor and the connecting member Even if the connection is left unconnected, the cylinder is rotated together with the rotor by inserting and rotating a proper key, and the slide member is moved to the initial position in the cylinder radial outer direction by the cam structure provided inside the housing. As a result, the connecting member moves axially in the cylinder direction and engages with the rotor, so that it has an excellent effect that a normal unlocking operation can be performed.

  Hereinafter, the best mode for carrying out the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is an exploded perspective view showing a cylinder lock according to an embodiment of the present invention, FIG. 2 is an explanatory cross-sectional view of key operation of the cylinder lock, and FIG. 3 is an explanatory view of a main part showing a state in which a slide member moves in a radial direction. It is.

  As shown in FIG. 1, a cylinder lock according to the present invention includes a housing 1 fixed to a vehicle body opening / closing part that is a base, a cylinder 3 that is rotatably provided in the housing 1, and a protrusion / disconnection mounted on the cylinder 3. Stepped rotor 2 having possible tumbler, unlocking member 5 connected to the rear end portion of rotor 2, connecting member 4 detachably fitted to the rear end portion of rotor 2, and return It comprises a spring 6, a collar 7 disposed between the connecting member 4 and the return spring 6, and a slide member 8 disposed between the housing 1 and the cylinder 3.

  A contact portion 11 that contacts the contact surface 10 of the flange portion 9 of the rotor 2 is formed on the front end side edge portion of the housing 1 so as to face the circumferential direction. The cylinder 3 is rotatably inserted into the housing 1 from the rear end side, and the rotor 2 inserted from the front end side is mounted in the cylinder 3. Here, the movement of the rotor 2 in the axial direction is restricted by contact between the contact portion 11 of the housing 1 and the contact surface 10 of the flange portion 9 of the rotor 2. Further, as shown in FIGS. 2 and 3, a cam groove 12 is formed in the inner peripheral portion on the rear end side of the housing 1 so as to face each other.

  The rotor 2 is provided with a tumbler 14 that engages with an engagement groove 13 to be described later, and a key groove 15 is formed on the front surface of the flange portion 9. By inserting a regular key into the key groove 15, the tumbler 14 is immersed and the engagement with the engagement groove 13 is released. In this released state, the lock can be unlocked by rotating the rotor 2 by a regular key operation. become. The rotor 2 has a large diameter portion 16 on the front side extending from the flange portion 9 and a small diameter portion 17 on the rear side. A pair of engagement notches 18 formed in the circumferential direction are provided on both sides of the large diameter portion 16 in the vicinity of the small diameter portion 17, and an engagement convex portion 19 of the connecting member 4 described later is engaged. Further, a circumferential groove 21 for fitting an E ring 20 extending in the circumferential direction is provided at the rear end of the small diameter portion 17.

  A large-diameter portion 16 of the rotor 2 is rotatably mounted on the cylinder 3, and an engagement groove 13 extending in the axial direction is formed on the inner surface of the cylinder 3 so as to face the rotor 3. The tumbler 14 that protrudes from the peripheral surface of the engagement is engaged. A guide groove 23 is formed in the rear end flange portion 22 of the cylinder 3 so as to hold a slide member 8 to be described later so that the slide member 8 can be moved in the radial direction, and an insertion hole 24 is continuously formed in the guide groove 23.

  The slide member 8 has a substantially wedge shape, is held by the guide groove 23 of the cylinder 3, the insertion hole 24, and the housing 1 and is movable in the radial direction of the cylinder 3, and the inclined surface 25 of the slide member 8. Is in contact with an inclined surface 26 of the connecting member 4 described later. The tip 27 of the slide member 8 is formed in a shape that matches the shape of the cam groove 12 of the housing 1. When the rotor 2 is operated with a regular key, the tip 27 of the slide member 8 is cam groove. 12 is engaged. When the rotor 2 is operated with an incorrect key, the cylinder 3 also rotates in conjunction with it, so that the slide member 8 is disengaged from the distal end portion 27 and the cam groove 12 and moved inward in the radial direction. The other end of the member 8 passes through the insertion hole 24 and engages with an engagement notch 18 provided in the large-diameter portion 16 of the rotor 2 in the rotational direction.

  The small diameter portion 17 of the rotor 2 includes a connecting member 4 that contacts the rear end of the cylinder 3, a return spring 6 that constantly urges the connecting member 4 toward the cylinder 3, a substantially C-shaped collar 7 made of resin, The unlocking member 5 is engaged by an engaging means provided on a collar 7 to be described later and is integrally configured and mounted. The connecting member 4 has an insertion hole 28 and is formed in a disc shape, and a pair of engaging convex portions corresponding to the engaging notch portions 18 of the large-diameter portion 16 of the rotor 2 are formed on the front surface of the connecting member 4. 19 is provided in the vicinity of the insertion hole 28, so that the engagement protrusion 19 of the connecting member 4 is detachably engaged with the engagement notch 18 of the large diameter portion 16. In addition, an inclined surface 26 that contacts the inclined surface 25 of the slide member 8 is formed on the outer peripheral edge of the front surface of the connecting member 4, and the inclined surface 26 is associated with the movement of the slide member 8 in the radially inward direction of the cylinder 3. Is pressed, and the connecting member 4 is axially moved in the direction of the unlocking member 5 against the return spring 6.

  An engagement protrusion 29 extending in the axial direction is provided at a predetermined position on the back surface of the connecting member 4, and a pair of engagement protrusions 30 provided on the outer peripheral surface of the collar 7 at a substantially central portion of the engagement protrusion 29. An engagement hole portion 31 is provided for engaging the. The inner peripheral surface of the engagement protrusion 29 of the connecting member 4 and the outer peripheral surface of the collar 7 are contact surfaces, and the inner peripheral surface of the collar 7 is a contact surface of the return spring 6. At the rear end portion of the collar 7, a pair of hook-shaped engagement portions 32 are provided so as to extend in the axial direction of the engagement convex portion 30. The return spring 6 constantly urges the connecting member 4 in the direction of the cylinder 3 and simultaneously returns the connecting member 4 to the initial rotational position with respect to the housing 1.

  The unlocking member 5 disposed behind the return spring 6 includes an engagement hole portion 36 that engages with an engagement protrusion 29 of the connecting member 4, and a hook-shaped engagement of the collar 7 provided in the engagement hole portion 36. An engagement step portion 33 with which the joint portion 32 is engaged and an insertion hole 34 through which the small diameter portion 17 of the rotor 2 is inserted are formed. The engagement hole portion 36 has an engagement projection 29 and a collar. 7 is engaged so that it can move in the axial direction and cannot rotate. That is, the unlocking member 5 can be integrally rotated only in the direction around the axis with respect to the connecting member 4 as the connecting member 4 rotates, and the connecting member 4 can be moved in the axial direction together with the collar 7. Yes. A leg 35 that engages with the tip of the return spring 6 is formed on the front edge of the unlocking member 5, and the connecting member 4, the collar 7, the return spring 6, and the unlocking member 5 are assembled together. At this time, one end of the return spring 6 is locked, and the other end of the return spring 6 is engaged with the connecting member 4. The connecting member 4, the collar 7, the return spring 6, and the unlocking member 5 that are assembled together are mounted so that the small diameter portion of the rotor 2 is inserted from the rear end side of the housing 1. Are engaged and assembled with a pair of engaging portions 37 formed inside the rear end of the housing 1. Thus, the small-diameter portion 17 of the rotor 2 is rotatably inserted into the insertion hole 34, and the E-ring 19 for retaining is fitted into the circumferential groove 20 of the small-diameter portion 17. Further, a wire (not shown) is attached to the unlocking member 5 and connected to a lock device (not shown).

  In the above configuration, when a regular key is inserted into the key groove 15 and rotated, the tumbler 14 is immersed, so that the engagement with the engagement groove 13 is released and the rotor 2 rotates. As a result, the rotor 2, the collar 7 and the connecting member 4 rotate together, and the unlocking member 5 also rotates. As a result, locking / unlocking according to the rotational position of the rotor 2 becomes possible.

  On the other hand, when the rotary operation is performed using an unauthorized key or instrument, the tumbler 14 remains engaged with the engagement groove 13 of the cylinder 3, so that the cylinder 3 also rotates in conjunction with the rotor 2 and the cam groove 12 is moved. Since the slide member 8 moves inward in the radial direction of the cylinder 3 and moves the connecting member 4 in the unlocking member 5 direction, the engagement between the connecting member 4 and the rotor 2 is released, and the rotor 2 It becomes idle. Since the coupling member 4 and the rotor 2 are thus disengaged, the coupling member 4 does not rotate even when the rotor 2 rotates, and the unlocking member 5 that engages the coupling member 4 does not rotate. Unauthorized release of the locking device by an unauthorized key or instrument can be prevented.

  Here, even if an unauthorized key or instrument is extracted and left at a position other than the key insertion / removal position of the rotor 2, the slide member 8 moves inward in the radial direction of the cylinder 3 as shown in FIGS. 2 is engaged with the engagement notch 18, and when the rotor 2 is rotated by inserting a proper key into the key groove 15, the cylinder 3 is also rotated and held in the guide groove 23 of the cylinder 3. When the slide member 8 is engaged with the cam groove 12 of the housing 1, the connecting member 4 is axially moved in the direction of the cylinder 3 by the urging of the return spring 6 in the axial direction. Therefore, normal unlocking operation can be performed.

  Since the cylinder lock of the present invention is configured as described above, when the rotor is rotated with an unauthorized key or instrument, the slide member moves inward in the radial direction of the cylinder via the cam mechanism, and at the same time the connecting member also The shaft moves in the rear end direction, and the engagement between the connecting member and the rotor is released, thereby preventing unauthorized release of the locking device. Moreover, even if the rotor is left in a position other than the key insertion / removal position, the correct key is inserted next, the rotor is rotated, the cylinder engaged with the rotor is rotated, and the connecting member is moved to the cylinder side. By doing so, the connecting member and the rotor are fitted and connected, and a normal unlocking operation can be performed.

  In addition, a substantially wedge-shaped slide member that moves in the cylinder radial direction is used, the size of the member can be reduced, and the cylinder lock itself can also be reduced in size and weight.

It is a disassembled perspective view which shows the cylinder lock which concerns on one Example of this invention. It is explanatory drawing sectional drawing of the key operation of the cylinder lock which concerns on one Example of this invention. It is principal part explanatory drawing which shows the state which a slide member moves to radial direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Rotor 3 Cylinder 4 Connection member 5 Unlocking member 6 Return spring 7 Collar 8 Slide member 9, 22 Flange part 10 Contact surface 11 Contact part 12 Cam groove 13 Engagement groove 14 Tumbler 15 Key groove 16 Large diameter part 17 Small-diameter portion 18 Engagement notch 19 Engagement projection 20 E-ring 21 Circumferential groove 23 Guide groove 24, 28, 34 Insertion hole 25, 26 Inclined surface 27 Tip portion 29 Engagement protrusion 30 Engagement projection 31, 36 Engagement hole 32 Vertical engagement part 33 Engagement step part 35 Leg part 37 Engagement part

Claims (2)

  A housing fixed to the base body, a cylinder built in the housing, and a tumbler that can be moved into and out of engagement with the cylinder. When the regular key is inserted, the tumbler is immersed and disengaged from the cylinder. A rotor that rotates within the cylinder, a connecting member that is detachably fitted to the rotor, and a connecting member that is rotatably and integrally engaged with the connecting member and is connected to the lock device via a transmission member; A locking member and a spring for biasing the connecting member in a direction in which the connecting member is fitted to the rotor, and a slide member provided between the housing and the cylinder moves inwardly in the cylinder radial direction as the cylinder rotates. And an inclined surface formed on the slide member presses and displaces the connecting member against the spring to release the engagement between the rotor and the connecting member. Cylinder lock.   2. The cylinder lock according to claim 1, wherein when the slide member moves inward in the cylinder radial direction, the slide member engages with the rotor in a rotational direction.

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