JP4237089B2 - Door lock device - Google Patents

Description

  The present invention enables a door opening operation by a handle in an unlocked state, while invalidating a door opening operation by a handle in a locked state, and rotation of a key cylinder by a key operation. Is transmitted to the lock mechanism as a rotational driving force, and relates to a door lock device including an operation input means for switching the lock mechanism between an unlocked state and a locked state.

  In a vehicle such as a four-wheeled vehicle, a door lock device is generally provided between an outside handle provided on a door and a latch mechanism. The latch mechanism includes a latch and a ratchet. When the door is closed with respect to the vehicle main body, the latcher engages and holds the striker of the vehicle main body, and further holds the engagement state between the latch and the striker by the ratchet. Thus, the door is kept closed with respect to the vehicle body.

  The door lock device is provided with a lock mechanism that switches between an unlocked state and a locked state by a key operation of a key cylinder provided on the outside of the door or an inside lock button provided on the indoor side of the door. The cylinder and the inside lock button are linked to each other by linkage means.

  As the linking means for linking the key cylinder and the lock mechanism, there is one that applies an operation input means that transmits a rotation driving force to the lock mechanism when a key rod provided in the key cylinder rotates. . The operation input means includes, for example, an input shaft portion arranged to be rotatable around its own axis, and a drive lever portion extending radially outward from the input shaft portion. The drive lever portion is engaged with the driven lever of the lock mechanism while being inserted and engaged with the shaft portion. In this operation input means, the rotation of the key cylinder is transmitted to the input shaft portion through the key rod, and the rotation of the input shaft portion is transmitted to the driven lever of the lock mechanism through the drive lever portion. The lock mechanism can be switched between an unlocked state and a locked state according to the moving direction (see, for example, Patent Document 1).

  When the door lock device is in the unlocked state, the open door operation by the outside handle is validated and transmitted to the ratchet, and when the ratchet is engaged with the latch, the engagement state of the ratchet with the latch is changed. Functions to release. As a result, the meshing state of the latch and the striker is also released, and the door can be opened with respect to the vehicle body.

  On the other hand, when the door lock device is in the locked state, the open door operation by the outside handle is invalidated and is not transmitted to the ratchet. As a result, even when the outside handle is operated, the latch and the striker are held in an engaged state, and the vehicle can be locked.

JP 2002-147084 A

  According to the door lock device described above, since the key rod rotating around its own axis is only exposed to the outside during the period from the key cylinder to the lock mechanism, for example, a malicious person can Even when a foreign object is inserted through the gap, there is no possibility of causing a situation where the lock mechanism is switched from the locked state to the unlocked state. Accordingly, the anti-theft property can be improved as compared with a door lock device in which the key cylinder and the lock mechanism are linked by a link or a wire.

  However, in recent years, there are an increasing number of techniques for pushing a tool such as a screwdriver into a key cylinder to destroy it. That is, it is a technique for invading the vehicle by forcibly rotating the input shaft portion of the operation input means by destroying the key cylinder and switching the lock mechanism to the unlocked state, and an immediate countermeasure is desired.

  In view of the above circumstances, an object of the present invention is to provide a door lock device capable of ensuring the anti-theft property of a vehicle even with a technique for pushing a tool such as a driver into a key cylinder and destroying it.

In order to achieve the above object, the door lock device according to claim 1 of the present invention enables the opening door operation by the handle when it is unlocked, and by the handle when it is locked. A lock mechanism for disabling the opening door operation, and an operation input means for transmitting the rotation of the key cylinder by the key operation to the lock mechanism as a rotational driving force and switching the lock mechanism between an unlocked state and a locked state. In the door lock device, the operation input means is disposed so as to be rotatable about its own axis, and receives the rotation of the key cylinder as a rotational driving force, and extends radially outward from the input shaft. A drive lever portion that swings as the input shaft portion rotates, and the lock mechanism includes a driven lever that swings around a predetermined axis. The drive lever portion and the driven lever are linked to each other by an engaging means, and when the key cylinder is rotated by a key operation, the swing of the drive lever portion is transmitted to the driven lever via the engaging means. The locking mechanism is switched by doing this, while the operation input means and the driven lever are installed in the housing, and the part of the housing corresponding to the rotational movement region of the operation input means is surrounded by a weak part When an external force exceeding a preset value is applied to the key cylinder along the axial direction of the key cylinder, the operation input means presses the dividing portion, and the pressing causes the weak portion to pass through the weak portion. The dividing portion is separated from the housing, and the operation input means is moved by the division, so that the linkage by the engaging means is released. And said that the cause.

  According to the present invention, when an external force exceeding a preset value is applied along the axial direction of the key cylinder, the rotational driving force from the operation input means to the lock mechanism is cut off. Even when the tool is pushed into the key cylinder for destruction and the operation input means is forced to rotate with the tool, the state of the lock mechanism cannot be switched. Therefore, there is no possibility that the lock mechanism in the locked state is switched to the unlocked state, and the vehicle can be sufficiently secured against theft.

  Exemplary embodiments of a door lock device according to the present invention will be explained below in detail with reference to the accompanying drawings.

  1 to 5 show a door lock device according to an embodiment of the present invention. The door lock device illustrated here includes an outside handle OH and a latch mechanism 10 which will be described later on a side door of a front hinge arranged on the right side of the front seat of a four-wheeled vehicle (a door D on the driver seat side in a right-hand drive vehicle). The main case 1a and the sub case 1b are provided. The main case 1a and the sub case 1b are each formed of a resin material, for example, and constitute the housing 1 by being joined to each other.

  The housing 1 constituted by the main case 1a and the sub case 1b includes a latch mechanism accommodating portion 20 extending along the left-right direction of the door D, and a door from an end located on the indoor side of the latch mechanism accommodating portion 20. And a lock mechanism housing portion 30 extending in the front-rear direction of D, and is substantially L-shaped when viewed from above.

  The latch mechanism accommodating portion 20 has a horizontal cutout groove 21 extending substantially horizontally from the indoor side toward the outdoor side at a position substantially at the center in the height direction. Is housed in. The lock mechanism accommodating portion 30 of the housing 1 accommodates the open lever 40 and the lock mechanism 50 therein.

  The latch mechanism 10 accommodated in the latch mechanism accommodating portion 20 is provided in such a manner that it can be engaged with the striker S provided in the vehicle body of the four-wheeled vehicle. Like the previous one, the latch 11, ratchet 12, and A ratchet lever 13 is provided.

  In this latch mechanism 10, when the door D in the opened state with respect to the vehicle main body is closed, the latch 11 is moved around the latch shaft 14 by the striker S provided in the vehicle main body into the horizontal cutout groove 21. The striker S is appropriately rotated clockwise to be held in the engagement groove 11 a of the latch 11, and the state where the striker S is held in the engagement groove 11 a of the latch 11 by the ratchet 12 engaged with the latch 11 is maintained. . As a result, the door D is maintained in a closed state with respect to the vehicle body.

  When the action portion 13a of the ratchet lever 13 is swung upward from this state, the engagement state between the latch 11 and the ratchet 12 is released, and the latch 11 is counterclockwise in FIG. 1 by the elastic restoring force of a latch spring (not shown). Rotate around. As a result, the meshing groove 11a of the latch 11 is opened, the striker S can be moved in the direction of detachment, and the door D can be opened with respect to the vehicle body.

  The open lever 40 accommodated in the lock mechanism accommodating portion 30 is rotated via an open lever shaft 41 extending substantially horizontally along the front-rear direction of the vehicle body at a position further below the ratchet 12 of the latch mechanism 10. It is arranged so as to have an open action end 40a and an open operation end 40b. The open action end 40 a is a portion extending radially outward from the open lever shaft 41 toward the outdoor side, and the extended end protrudes outside the housing 1. An outside handle linking means L such as a link or a wire linked to the outside handle OH provided on the door D is connected to a portion of the open action end 40 a that protrudes outside the housing 1. The outside handle linking means L links the outside handle OH and the open lever 40 so that the open operation end 40b moves up when the outside handle OH is operated to open the door. The open operation end portion 40 b is a portion extending radially outward from the open lever shaft 41 toward the indoor side, and the extended end portion is in the lower region of the action portion 13 a of the ratchet lever 13 inside the housing 1. positioned.

  The lock mechanism 50 latches the unlocked state in which the rotation operation of the open lever 40 by the opening operation of the outside handle OH is transmitted to the latch mechanism 10 and the rotation operation of the open lever 40 by the opening operation of the outside handle OH. 10 is provided with a driven lever 51.

  The driven lever 51 is an element of the lock mechanism 50 and serves as an input end when switching between the unlocked state and the locked state. The follower lever 51 is disposed on the upper part of the lock mechanism housing 30 so as to be swingable via a follower lever shaft 52 extending substantially horizontally along the left-right direction of the vehicle body. An engagement hole 51a (engagement means) is provided in a portion extending upward. The engagement hole 51 a is a long hole formed along the extending direction of the driven lever 51 at the distal end portion of the driven lever 51.

  In the lock mechanism 50, when the driven lever 51 is occupied in the state shown in FIG. 2, the unlocking state is established, and when the open operation end 40b of the open lever 40 is moved upward by the door opening operation of the outside handle OH, The upward movement of the open operation end 40b is transmitted to the ratchet lever 13, the action portion 13a of the ratchet lever 13 swings upward, and the engagement state between the latch 11 and the ratchet 12 is released. The door D can be opened.

  On the other hand, when the driven lever 51 swings clockwise in FIG. 2, the lock mechanism 50 is in a locked state, and the open operation end portion 40b of the open lever 40 is moved upward by the door opening operation of the outside handle OH. However, the upward movement of the open operation end 40b is not transmitted to the ratchet lever 13, and the action portion 13a of the ratchet lever 13 does not swing upward, so that the door D is kept closed with respect to the vehicle body. As a result, the vehicle can be locked.

  On the other hand, the door lock device includes an operation input means 60 in a portion of the lock mechanism housing portion 30 that is an extended extension region of the driven lever 51. The operation input means 60 is a portion where rotation of a key cylinder KC provided on the door D is input as a rotational driving force, and includes an input shaft portion 61 and a drive lever portion 62. As shown in FIGS. 4 and 5, the input shaft portion 61 is a portion for inserting a key rod KR extending from the key cylinder KC. The input shaft portion 61 has a key rod receiving hole 61a at the distal end surface and a bearing hole at the proximal end surface. It has a cylindrical shape with 61b. In the present embodiment, a key rod KR having a cross-shaped tip is applied, and the key rod receiving hole 61a is configured in a cross-shaped hole shape so as to engage with the cross-shaped portion of the key rod KR. The drive lever portion 62 is a portion extending from the outer peripheral surface of the input shaft portion 61 in the radially outward direction, and has an engagement pin 62a (engagement means) at the extended end portion thereof. The engagement pin 62a is a small-diameter columnar portion having an outer diameter that penetrates the engagement hole 51a formed in the driven lever 51 and is movable in the extending direction.

  The operation input means 60 inserts the projecting shaft portion 31 provided in the sub case 1b into the bearing hole 61b of the input shaft portion 61, while facing the opening of the key rod receiving hole 61a to the outside through the opening 32 of the main case 1a. Furthermore, the engaging pin 62a of the drive lever portion 62 is rotatably disposed inside the housing 1 in a state where the engaging pin 62a is passed through the engaging hole 51a of the driven lever 51 from the sub case 1b side.

  Further, as shown in FIGS. 3 and 4, the door lock device includes a dividing portion 1 c in a portion corresponding to the rotational movement region of the operation input means 60 in the sub case 1 b of the housing 1. The dividing portion 1c is a portion surrounded by a notch 33 (fragile portion) formed on the inner surface of the sub case 1b, and can be easily divided with respect to other portions when an external force exceeding a preset value is applied. Is possible.

  In the door lock device configured as described above, when a key is inserted into the key cylinder KC and operated, the rotation of the key cylinder KC is applied to the operation input means 60 via the key rod KR, and the drive lever portion 62 is input. It swings around the axis of the shaft 61. The swing of the drive lever portion 62 is given to the driven lever 51 through the engagement pin 62a and the engagement hole 51a, and the lock mechanism 50 is unlocked when the driven lever 51 swings in an appropriate direction. And switching to the locked state.

  Here, in a situation where the lock mechanism 50 is in a locked state, when a malicious person tries to destroy a tool such as a driver by pushing it into the key cylinder KC, according to the door lock device, the key cylinder KC The external force along the axial center direction is transmitted to the operation input means 60 via the key rod KR, and as a result, the sub case 1b is moved inward via the projecting shaft portion 31 inserted into the bearing hole 61b of the operation input means 60. Is pressed from. For this reason, as shown in FIG. 6, the notch 33 is broken and the dividing portion 1 c is cut outward together with the operation input means 60, and the engaging pin of the driving lever portion 62 is engaged from the engaging hole 51 a of the driven lever 51. 62a will deviate.

  In this state, even if the operation input means 60 is rotated thereafter, the rotation is not transmitted to the lock mechanism 50 through the driven lever 51. Therefore, there is no possibility that the lock mechanism 50 in the locked state is switched to the unlocked state, and the vehicle can be sufficiently secured against theft.

  In addition, in embodiment mentioned above, although the door D of a four-wheeled vehicle is illustrated as an application object of a door lock apparatus, the door provided in vehicles other than a four-wheeled vehicle may be sufficient. Further, the present invention can be applied not only to the door provided on the side surface of the vehicle but also to the rear door. Further, the door may not be a front hinge, and may be applied to a door that opens and closes in another manner, such as an upper hinge door, a rear hinge door, a lower hinge door, and a slide door.

  In the above-described embodiment, the hole through which the engagement pin 62a passes is exemplified as the engagement recess of the engagement means. However, the hole is not necessarily a hole, and the engagement pin 62a can be engaged. For example, a depression is sufficient. Furthermore, while the engagement pin 62a is provided on the operation input means 60 and the engagement concave portion is provided on the driven lever 51, the engagement means may be provided in the opposite manner.

It is the side view which showed the door lock apparatus which is Embodiment 1 of this invention. It is a conceptual diagram which shows the internal structure of the door lock apparatus shown in FIG. It is the external view which looked at the door lock apparatus shown in FIG. 1 from the room inner side. It is the external view which looked at the door lock apparatus shown in FIG. 1 from the outdoor side. It is a principal part cross-sectional side view of the door lock apparatus shown in FIG. It is a principal part cross-sectional side view when an external force acts on the door lock device shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1a Main case 1b Subcase 1c Dividing part 10 Latch mechanism 11 Latch 11a Engagement groove 12 Ratchet 13 Ratchet lever 13a Action part 14 Latch shaft 20 Latch mechanism accommodation part 21 Horizontal notch groove 30 Lock mechanism accommodation part 31 Projection shaft part 32 Opening 33 notch 40 open lever 40a open action end 40b open operation end 41 open lever shaft 50 lock mechanism 51 driven lever 51a engaging hole 52 driven lever shaft 60 operation input means 61 input shaft portion 61a key rod receiving hole 61b bearing hole 62 drive Lever 62a Engagement pin D Door KC Key cylinder KR Key rod L Outside handle linkage means OH Outside handle S Strike

Claims (1)

When the unlocked state is activated, the opening door operation by the handle is enabled, while when the locked state is established, the opening door operation by the handle is invalidated, and the rotation of the key cylinder by the key operation is the rotational driving force. In the door lock device comprising the operation input means for transmitting to the lock mechanism and switching the lock mechanism between the unlocked state and the locked state,
The operation input means is disposed so as to be rotatable around its own axis, and receives an input shaft portion that receives the rotation of the key cylinder as a rotational driving force, and extends radially outward from the input shaft portion. A drive lever portion that swings with rotation of the shaft portion, and the lock mechanism includes a driven lever that swings around a predetermined axis, and further engages between the drive lever portion and the driven lever. When the key cylinder is rotated by a key operation, the lock mechanism is switched by transmitting the swing of the drive lever portion to the driven lever via the engagement means. ,
The operation input means and the driven lever are installed in a housing, and a part of the housing corresponding to the rotational movement region of the operation input means is configured to be surrounded by a weak part ,
When an external force exceeding a preset value is applied to the key cylinder along the axial direction of the key cylinder, the operation input means presses the dividing portion, and the pressing portion causes the dividing portion to pass through the fragile portion. Is separated from the housing, and the operation input means is moved by the division to release the linkage by the engagement means.

Images