JP6051484B2 - Door lock device - Google Patents

Description

  The present invention relates to a door lock device, and more particularly to a door lock device suitable for being attached to a back door of a vehicle.

  2. Description of the Related Art Conventionally, a door lock device for holding a door in a closed door state with respect to a vehicle body is attached to a back door (rear hatch) in a vehicle such as a four-wheeled vehicle.

  The door lock device includes a latch mechanism that restrains the striker when a latch engaged with a striker provided in the vehicle body meshes with the ratchet, and a mesh release mechanism that releases the mesh between the latch and the ratchet. The latch mechanism is housed in a latch case having a striker entry groove into which the striker enters. When the latch engaged with the striker reaches the full latch position or the half latch position, the ratchet engages with the latch, and the latch engages with the ratchet. When the release is released, the latch is configured to reach the open position. The mesh release mechanism is configured to move the ratchet engaged with the latch from the mesh position to the mesh release position. The mesh release mechanism includes a release lever, and can move the ratchet from the mesh position to the mesh release position. The release lever is linked to an open door device such as a key cylinder provided in the back door or an open handle provided in the vehicle.When the open door device is operated, the release lever operates to move the ratchet from the mesh position to the mesh release position. Moving.

  In the latch mechanism, as described above, when the latch reaches the full latch position or the half latch position, the latch and the ratchet mesh with each other, and the striker is restrained. The latch and ratchet engagement at the half-latch position is due to factors other than operation of the open door device, when the latch and ratchet engagement at the full latch position is released, the latch moves to the open position and the back door It is effective to prevent it from opening. However, if the operator operates the open door device to open the back door to release the engagement between the latch and the ratchet at the full latch position, the latch and the ratchet are engaged at the half latch position. Since the door does not open, the operator must operate the open door device again. As a door lock device to avoid such a situation, when the open door device is operated to release the latch and ratchet in the full latch position, the latch engages until the latch goes to the open position beyond the half latch position. However, there is one provided with a holding mechanism for holding the released state (see, for example, Patent Document 1).

  The holding mechanism includes a holding lever that engages with the release lever when the ratchet is moved to the mesh release position by the release lever and holds the ratchet at the mesh release position, and the latch is engaged after the release lever and the holding lever are engaged. When a predetermined position is reached, the engagement between the holding lever and the release lever is released. In the door lock device having such a holding mechanism, the open door device and the release lever are provided in the mesh release mechanism so that the open door device can be returned to the initial state even when the release lever is engaged with the holding lever. When the open door device is operated, the ratchet is moved to the mesh release position in cooperation with the release lever, and after the operation of the open door device is completed, it is moved to the position before the operation independently of the release lever. Some have a return operation lever (see, for example, Patent Document 2).

No. 06-008226 JP 2010-174567 A

  However, in the conventional door lock device provided with the holding lever, the mesh release mechanism is provided on either the side having the rotation center of the ratchet or the side having the rotation center of the latch with the striker entry groove provided in the latch case as a boundary. Both the holding mechanism and the holding mechanism are provided. For this reason, the door lock device is enlarged, and there is a problem that, for example, the installation position is restricted.

  The present invention has been made in view of the above, and includes a holding lever that holds a state where the engagement is released until the half latch position is exceeded when the engagement between the latch and the ratchet at the full latch position is released. An object of the present invention is to provide a technique capable of downsizing a door lock device provided.

In order to achieve the above object, the door lock device according to claim 1 of the present invention is configured such that when a latch engaged with a striker reaches a full latch position or a half latch position, a ratchet engages with the latch, When the meshing with the ratchet is released, the latch reaches the open position, the meshing release mechanism for moving the ratchet meshed with the latch from the meshing position to the meshing release position, and meshing with the latch at the full latch position A holding mechanism for holding the ratchet in the mesh release position until the latch moves to the open position beyond the half latch position when the ratchet is moved to the mesh release position by the mesh release mechanism; and a latch case for, in the door lock device is attached to the back door of a motor vehicle, The latch case has a striker entry groove into which the striker enters, the latch and the ratchet are rotatable with respect to the latch case, and the rotation center of the latch and the rotation center of the ratchet are The engagement release mechanism is provided with a release lever that is rotatably arranged with respect to the door lock device. The ratchet can be moved from the meshing position to the meshing release position, and the holding mechanism includes a first holding lever disposed rotatably with respect to the door lock device, and a latch case with respect to the latch case. and a second holding lever which is arranged rotatably, the axis of rotation of the first holding lever, a rotation axis of the second holding lever, said strike Is disposed on the side where there is a rotation center of the latch squid groove as a boundary, the first holding lever, the release lever engages when moving the ratchet in the release lever disengagement position from the engagement position The ratchet is held in the mesh release position, and the second holding lever is engaged with the latch when the latch reaches a predetermined position, and the first holding lever is moved from the engagement position with the release lever. The rotation axis of the release lever is disposed on the side where the rotation center of the ratchet is located with the striker groove as a boundary, and the release lever and the ratchet have a boundary with the striker entry groove. And the second holding lever and its rotation shaft can be latched with the striker entry groove as a boundary. Arranged and tare on side rotational center of is, the mesh release mechanism is associated individually with the door opening device provided in the door opening device and the vehicle provided in the back door, the corresponding door opening A first operating lever and a second operating lever that operate when the device is operated to move the ratchet from the meshing position to the meshing release position, and the ratchet is attached to a ratchet shaft provided in the latch case. And a lever disposing portion that protrudes from the latch case, the first operating lever is pivotally supported on the rotation shaft of the release lever provided in the lever disposing portion, and the second operating lever is And is supported by the ratchet shaft .

Door lock device according to claim 2 of the present invention, Te door lock apparatus odor according to claim 1, before Symbol first operating lever and said second lever, the lever arrangement portion provided on the outer side of the latch casing The ratchet is moved to the disengagement position via the release lever disposed on the release lever, and the release lever is rotatably supported by the lever disposition portion by a release lever shaft. The ratchet is is rotatably supported by the ratchet shaft provided on the case, the ratchet abutting portion of the release lever abuts against the ratchet when moving to the disengaged position the ratchet from engagement position, the ratchet engagement position A second operation receiving portion of the release lever that comes into contact with the second operation lever when moving from the position to the mesh release position; , Characterized in that it displaced in the axial direction of the ratchet shaft.

A door lock device according to a third aspect of the present invention is the door lock device according to the first aspect, wherein the latch case includes a concave cover plate capable of accommodating the latch mechanism, and an opening surface side of the cover plate. and a back plate that covers the back plate is composed of a cover portion, and wherein the lever arrangement portion is a surface facing the end side there is entrance of the striker entry groove, the lever disposed between the cover portion The portion is located near the end of the cover plate opposite to the end where the striker entrance groove is located, is substantially L-shaped in a side view, and the lever arrangement portion is covered by the cover. The release lever is bent in a direction away from the cover plate, and one end of the release lever enters the latch case through an opening provided in the latch case. The ratchet is disposed in the lever disposition portion so as to be movable from the mesh disengagement position to the mesh disengagement position, the first holding lever is disposed in the lever disposition portion, and the second The holding lever is configured in such a manner that one end of the holding lever passes through an opening provided in the latch case and comes out of the latch case to move the first holding lever from the engagement position with the release lever to the disengagement position. The cover portion is disposed on a surface facing the latch.

  The door lock device according to a fourth aspect of the present invention is the door lock device according to the third aspect, wherein the release lever and the first holding lever have an entrance of the striker entry groove in the lever arrangement portion. It is characterized in that the engagement position of the release lever and the first holding lever is arranged on the surface facing the end portion so as to be within the mutual rotation range.

  The door lock device according to a fifth aspect of the present invention is the door lock device according to any one of the first to fourth aspects, wherein the first holding lever moves the latch from the half latch position to the open position side. In this case, the engagement with the release lever is released.

  The door lock device according to a sixth aspect of the present invention is the door lock device according to any one of the first to fourth aspects, wherein the first holding lever moves the latch from the half latch position to the full latch position side. In this case, the engagement with the release lever is released.

  The door lock device according to the present invention engages the second holding lever that moves the first holding lever from the engagement position with the release lever to the disengagement position when the latch moves to a predetermined position. Are configured to move in one direction. Therefore, the movement locus of the second holding lever can be reduced, and the second holding lever can be accommodated in the latch case. In the door lock device according to the present invention, the contact position between the release lever, which is a mesh release mechanism, and the ratchet is in the latch case, and the rotation center of the ratchet is set on the side where the striker entry groove is a boundary. . That is, in the door lock device according to the present invention, a part of the mesh release mechanism and the holding mechanism disposed in the lever disposition portion is accommodated in the latch case. Therefore, in the door lock device according to the present invention, the lever disposition portion for disposing the mesh release mechanism and the holding mechanism can be efficiently disposed and reduced, and the door lock device can be downsized.

FIG. 1 is a perspective view showing a schematic configuration of a door lock device according to Embodiment 1 of the present invention. FIG. 2 is a side view of the door lock device shown in FIG. FIG. 3 is a plan view showing a schematic configuration inside the latch case. FIG. 4 is a front view showing a schematic configuration inside the latch case. FIG. 5 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked with the first operation lever and the latch reaches the half latch position. . FIG. 6 is a front view of the door lock device shown in FIG. FIG. 7 is a plan view showing a state of the door lock device when the latch reaches the open position beyond the half latch position shown in FIG. FIG. 8 is a front view of the door lock device shown in FIG. FIG. 9 is a plan view showing a state of the door lock device when the striker enters the striker entry groove again after reaching the open position and the latch reaches the half latch position. FIG. 10 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked to the second operation lever and the latch reaches the half latch position. . FIG. 11 is a front view of the door lock device shown in FIG. FIG. 12 is a plan view showing a schematic configuration inside the latch case 1 in the door lock device according to the second embodiment of the present invention. FIG. 13 is a front view showing a schematic configuration inside the latch case. FIG. 14 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked to the first operation lever and the latch reaches the half latch position. . FIG. 15 is a front view of the door lock device shown in FIG. FIG. 16 is a plan view showing a state of the door lock device when the latch reaches the open position beyond the half latch position shown in FIG. 14. 17 is a front view of the door lock device shown in FIG. FIG. 18 is a plan view showing a state of the door lock device immediately after the latch and the ratchet are disengaged in the full latch position by pressing the open door operation receiving portion of the ratchet. FIG. 19 is a plan view showing a state of the door lock device when the latch reaches the half latch position from the position shown in FIG. 20 is a front view of the door lock device shown in FIG. FIG. 21 is a plan view showing the state of the door lock device when the latch and the ratchet are disengaged at the half latch position shown in FIG. 19 by the pressing of the open door operation receiving portion of the ratchet and the latch reaches the open position. FIG. FIG. 22 is a front view of the door lock device shown in FIG.

  Hereinafter, embodiments (embodiments) of a door lock device according to the present invention will be described in detail with reference to the drawings. In all the drawings for explaining the embodiments, parts having the same function are given the same reference numerals, and repeated explanation thereof is omitted.

  Further, in the following embodiments, as an example of the door lock device according to the present invention, a door lock device that holds an open / close body such as a back door attached to the vehicle body by an upper hinge in a closed door state with respect to the vehicle body. I will give you. This door lock device is attached to the lower end of the back door.

(Embodiment 1)
FIG. 1 is a perspective view showing a schematic configuration of a door lock device according to Embodiment 1 of the present invention. FIG. 2 is a side view of the door lock device shown in FIG. FIG. 3 is a plan view showing a schematic configuration inside the latch case. FIG. 4 is a front view showing a schematic configuration inside the latch case.

  The door lock device of the present embodiment includes a latch case 1, a latch mechanism, a mesh release mechanism, and a holding mechanism, which are configured as shown in FIGS.

  The latch case 1 includes a body 101, a cover plate 102, and a back plate 103.

  The latch case 1 is provided with a space capable of accommodating the second holding lever 17 of the latch mechanism and the holding mechanism by covering the opening surface of the concave cover plate 102 with the body 101 and the back plate 103. The latch case 1 is provided with a striker entry groove 1S into which a striker S provided in the vehicle body enters. The striker entry groove 1 </ b> S has a striker advance entrance on the end surface of the latch case 1 on the vehicle front side, and terminates at the approximate center in the vehicle front-rear direction. The cover plate 102 is provided with an attachment portion 102b having a screw hole 102a for attaching the latch case 1 (door lock device) to the back door on the outer peripheral portion on the opening surface side. The back plate 103 includes a cover portion 103a for providing a space capable of accommodating the second holding lever 17 between the body 101 and a lever disposing portion 103b for disposing the release lever 9 and the like. The boundary between the cover portion 103a and the lever arrangement portion 103b is located at the end of the latch case 1 on the rear side of the vehicle, and is substantially L-shaped in a side view shown in FIG. It is provided to bend toward the vehicle upper side with respect to the portion 103a.

  The latch mechanism includes a latch 2, a latch shaft 3, a first coil spring 4, a ratchet 5, a ratchet shaft 6, and a second coil spring 7.

  The latch 2 has a striker engagement groove 2a, a hook portion 2b, a full latch engagement portion 2c, a half latch engagement portion 2d, and a second holding lever drive portion 2e, and is attached to the latch case 1. The latch shaft 3 is rotatably supported. The latch 2 is engaged with the first coil spring 4 so that the counterclockwise biasing force in FIG. 3 due to the elastic restoring force of the first coil spring 4 attached to the latch shaft 3 always acts.

  The striker engagement groove 2 a is a groove that engages with the striker S that has entered the striker entry groove 1 </ b> S, and is formed from the outer peripheral surface of the latch 2 toward the latch shaft 3. The hook portion 2b is located on the vehicle front side with respect to the striker engagement groove 2a in FIG. 3, and when the latch 2 is in the full latch position or the half latch position, the striker S is restrained and the latch 2 is in the open position. Sometimes the striker S can be removed. The full latch locking portion 2c is located on the vehicle rear side of the striker engagement groove 2a in FIG. 3, and when the latch 2 reaches the full latch position, it engages with the ratchet 5 and prevents the latch 2 from rotating due to the urging force. It is. The half latch locking portion 2d is a portion that meshes with the ratchet 5 when the latch 2 reaches the half latch position and prevents the latch 2 from rotating due to the urging force. The second holding lever driving unit 2e is a portion that presses the second holding lever 17 and rotates the second holding lever 17 clockwise in FIG. 3 when the latch 2 rotates from the half latch position to the open position side. is there.

  The ratchet 5 has a meshing part 5a and an action part 5b, and is rotatably supported by a ratchet shaft 6 attached to the latch case 1. The ratchet 5 is engaged with the second coil spring 7 so that the clockwise urging force in FIG. 3 due to the elastic restoring force of the second coil spring 7 attached to the ratchet shaft 6 always acts. Further, the ratchet 5 is prevented from rotating clockwise in FIG. 3 at a predetermined rotational position (initial position) by a stopper 8 attached to the latch case 1 (cover plate 102).

  The meshing portion 5a is a portion that meshes with the full latch locking portion 2c and the half latch locking portion 2d of the latch 2. The action portion 5b is a portion that contacts the release lever 9 in a direction in which the ratchet 5 can be moved from the meshing position to the meshing release position.

  The latch 2 and the ratchet 5 are arranged so that the rotation center of the latch 2 (latch shaft 3) and the rotation center of the ratchet (ratchet shaft 6) are positioned on both sides with the striker entry groove 1S as a boundary. .

  The mesh release mechanism includes a release lever 9, a release lever shaft 10, a third coil spring 11, a first operation lever 12, and a second operation lever 13.

  The release lever 9 has a ratchet contact portion 9a, a first operation receiving portion 9b, a second operation receiving portion 9c, and a first holding lever engaging portion 9d, and is attached to the lever arrangement portion 103b. The lever shaft 10 is rotatably supported. The release lever 9 is engaged with the third coil spring 11 so that the clockwise urging force in FIG. 4 due to the elastic restoring force of the third coil spring 11 attached to the release lever shaft 10 always acts. The urging force of the third coil spring 11 is set smaller than the urging force of the second coil spring 7.

  The ratchet contact portion 9a enters the latch case 1 through the opening 103c provided in the back plate 103 (latch case 1), and the ratchet 5 is moved in a direction in which the ratchet 5 can move from the meshing position to the mesh release position. This is the part that contacts the action part 5b. When the first operation lever 12 is operated by the operation of the opening door device, the first operation receiving portion 9b rotates with the release lever 9 clockwise in FIG. It is the part that touches. The ratchet 5, release lever 9, and second operation lever 13 are arranged such that the ratchet contact portion 9 a and the first operation receiving portion 9 b are displaced in the axial direction of the ratchet shaft 6. The second operation receiving portion 9c is located between the rotation center (release lever shaft 10) of the release lever 9 and the ratchet contact portion 9a, and is released when the second operation lever 13 is operated by the operation of the opening door device. This is a portion that contacts the second operating lever 13 in a direction in which the lever 9 rotates counterclockwise in FIG. The first holding lever engaging portion 9d is a portion that engages with the first holding lever 14 when the release lever 9 moves the ratchet 5 from the engagement position to the engagement release position.

  The first operating lever 12 includes a transmission member connecting portion 12a and a release lever driving portion 12b, and is rotatably supported by the release lever shaft 10. The first operating lever 12 is prevented from being subjected to an urging force due to the elastic restoring force of the third coil spring 11. The first operating lever 12 is supported on the release lever shaft 10 so as to be rotatable independently of the release lever 9, and is released when the release lever 9 is pressed by the release lever driving portion 12 b and by the release lever 9. Only when the lever driving part 12b is pressed, it rotates integrally with the release lever 9.

  The transmission member connecting portion 12a is a portion that connects a transmission member that transmits an operation of an open door device (for example, a key cylinder) provided to the back door to the first operation lever 12. The transmission member is connected to the first operation lever 12 so that the first operation lever 12 rotates clockwise in FIG. 4 when the opening door device is operated. The release lever drive unit 12b presses the first operation receiving portion 9b of the release lever 9 when the first operation lever 12 is operated by the transmission member and the first operation lever 12 rotates clockwise in FIG. It is a part which rotates the release lever 9 clockwise in FIG.

  The second operation lever 13 includes an open door operation receiving portion 13 a and a release lever driving portion 13 b, and is rotatably supported by the ratchet shaft 6.

  The open door operation receiving portion 13 a is a portion that receives pressure from a transmission member that transmits an operation of an open door device (for example, an open handle) provided in the vehicle to the second operation lever 13, and is an opening provided in the latch case 1. It protrudes out of the latch case 1 through 103d. The transmission member and the second operation lever 13 abut so that the second operation lever 13 rotates counterclockwise in FIG. 3 when the opening door device is operated. The release lever driving portion 13b presses the second operation receiving portion 9c of the release lever 9 when the second operation lever 13 is operated by the transmission member and the second operation lever 13 rotates counterclockwise in FIG. This is the part that rotates the release lever 9 clockwise in FIG.

  The holding mechanism includes a first holding lever 14, a first holding lever shaft 15, a fourth coil spring 16, a second holding lever 17, and a second holding lever shaft 18.

  The first holding lever 14 has a release lever locking portion 14a and an action portion 14b, and is rotatably supported by a first holding lever shaft 15 attached to the lever arrangement portion 103b. The first holding lever 14 is engaged with the fourth coil spring 16 so that the clockwise urging force in FIG. 4 due to the elastic restoring force of the fourth coil spring 16 attached to the first holding lever shaft 15 always acts. .

  The release lever locking portion 14a engages with the first holding lever engaging portion 9d of the release lever 9 when the ratchet 5 is moved to the mesh release position by the release lever 9, and the release lever 9 is rotated by the urging force. This is the part to stop. The action portion 9 b is a portion that contacts the second holding lever 17 in a direction in which the engagement between the first holding lever 14 and the release lever 9 is released.

  The second holding lever 17 includes a latch contact portion 17a and a first holding lever driving portion 17b, and is rotatably supported by a second holding lever shaft 18 attached to the cover portion 103a of the back plate 103. is there. The second holding lever shaft 18 extends from the cover portion 103 a of the back plate 103 toward the latch case 1, and the second holding lever 17 has a portion other than the first holding lever driving portion 17 b in the latch case 1. Is housed in.

  The latch contact portion 17a contacts the second holding lever driving portion 2e of the latch 2 when the latch 2 rotates counterclockwise in FIG. 3 and moves from the half latch position to the open position, and the second holding lever driving portion. This is the part that rotates the second holding lever 17 clockwise in FIG. 3 by pressing from 2e. The first holding lever driving portion 17b goes out of the latch case 1 through the opening 103e provided in the back plate 103 (latch case 1), and when the second holding lever 17 rotates clockwise in FIG. This is a portion that contacts the first holding lever 14 in a manner in which the engagement between the first holding lever 14 and the release lever 9 is released.

  As described above, in the door lock device of the present embodiment, the release lever 9 and the ratchet 5 are in the latch case 1 and the side where the rotation center (the ratchet shaft 6) of the ratchet 5 is located with the striker entry groove 1S as a boundary. It is in contact with. In the door lock device of the present embodiment, the second holding lever 17 that moves the first holding lever 14 from the engagement position with the release lever 9 to the disengagement position is in the latch case 1 and enters the striker. It is arranged on the side where the rotation center (latch shaft 3) of the latch 2 is located with the groove 1S as a boundary. Therefore, in the door lock device according to the present invention, the lever disposition portion 103b for disposing the mesh release mechanism and the holding mechanism can be reduced, and the door lock device can be downsized.

  Furthermore, the door lock device according to the present embodiment operates either the first operation lever 12 disposed on the lever disposition portion 103b or the second operation lever 13 projecting from the opening provided on the side surface of the latch case 1. Although the ratchet 5 can be moved to the mesh release position, the second operation lever 13 is overlapped with the ratchet 5 and is rotatably supported by the ratchet shaft 6, and the release lever 9 is rotated from the rotation center of the release lever 9. The distance to the second operation receiving portion 9c is shorter than the distance from the rotation center of the release lever 9 to the ratchet contact portion 9a of the release lever 9. Therefore, the second operation lever 13 can be efficiently disposed in the latch case 1 and the contact position between the ratchet 5 and the release lever 9 and the contact position between the second operation lever 13 and the release lever 9 can be determined. It can be set efficiently in the latch case 1. That is, the door lock device of the present embodiment prevents the door lock device from being enlarged by providing the second operation lever 13.

  Next, the operation of the door lock device according to this embodiment will be described. In the following description of the operation, the state shown in FIGS. 3 and 4, that is, the latch 2 engaged with the striker S is engaged with the ratchet 5 in the full latch position, and the back door is fully closed with respect to the vehicle. Start from where it is.

  FIG. 5 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked with the first operation lever and the latch reaches the half latch position. . FIG. 6 is a front view of the door lock device shown in FIG. FIG. 7 is a plan view showing a state of the door lock device when the latch reaches the open position beyond the half latch position shown in FIG. FIG. 8 is a front view of the door lock device shown in FIG. FIG. 9 is a plan view showing a state of the door lock device when the striker enters the striker entry groove again after reaching the open position and the latch reaches the half latch position. FIG. 10 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked to the second operation lever and the latch reaches the half latch position. . FIG. 11 is a front view of the door lock device shown in FIG.

  In a vehicle in which the door lock device of this embodiment is attached to a back door, when a key is inserted into a key cylinder provided in the back door and rotated to open the back door, the operation is transmitted to the first operation lever 12. The When the opening door is operated by the key cylinder, the first operating lever 12 rotates clockwise in FIG. 4, and the release lever driving unit 12 b presses the first operation receiving unit 9 b of the release lever 9. When the release lever 9 receives pressure from the release lever driving portion 12b, the release lever 9 rotates clockwise in FIG. 4 and presses the action portion 5b of the ratchet 5. When the ratchet 5 is pressed by the release lever 9, it rotates counterclockwise in FIG. 3 against the urging force from the second coil spring 7 acting on the ratchet 5, and moves to the mesh release position. When the ratchet 5 moves to the engagement release position, the engagement between the full latch locking portion 2c of the latch 2 and the engagement portion 5a of the ratchet 5 is released, so that the latch 2 is driven by the biasing force from the first coil spring 4. 3 rotates counterclockwise. Therefore, when the operation of the key cylinder is transmitted to the first operation lever 12, the door lock device is in the state shown in FIGS.

  When the release lever 9 rotates clockwise in FIG. 4 to move the ratchet 5 to the mesh release position, the first holding lever engaging portion 9d of the release lever 9 is moved to the first position as shown in FIGS. 1 The engaging lever 14a of the holding lever 14 is engaged. The first holding lever 14 engaged with the release lever 9 is applied with the counterclockwise urging force in FIG. 6 by the fourth coil spring 16. Therefore, even if the first operating lever 12 returns to the initial position indicated by the two-dot chain line in FIG. As long as the release lever 9 and the ratchet 5 are not released, the states shown in FIGS. 5 and 6 are maintained. That is, even when the latch 2 reaches the half latch position, the ratchet 5 is held at the mesh release position, and the meshing portion 5a of the ratchet 5 does not mesh with the half latch locking portion 2d of the latch 2. Therefore, the latch 2 goes to the open position beyond the half latch position.

  Note that the release lever driving portion 13b of the second operation lever 13 presses the second operation receiving portion 9c of the release lever 9 when the second operation lever 13 rotates counterclockwise in FIG. It contacts the release lever 9 in the direction of rotation. Therefore, when the release lever 9 is rotated by pressing from the first operation lever 12, the second operation lever 13 does not move. Therefore, the rotation of the release lever 9 due to the operation of the key cylinder provided on the back door is not transmitted to the transmission member or the open handle connected to the second operation lever 13.

  When the latch 2 goes to the open position beyond the half-latch position, the second holding lever driving part 2e provided on the latch 2 comes into contact with and presses the latch contact part 17a of the second holding lever 17 in the middle. When the second holding lever 17 receives a pressure from the second holding lever driving unit 2e, the second holding lever 17 rotates clockwise in FIG. 5 and the first holding lever driving unit 17b presses the action portion 14b of the first holding lever 14. . Since the second holding lever 17 rotates clockwise in FIG. 3 only within a range in which the latch 2 moves from the half-latch position to the open position, the movement locus of the second holding lever 17 can be reduced. When the first holding lever 14 receives a pressure from the first holding lever driving portion 17b, the first holding lever 14 rotates counterclockwise in FIG. 6 against the urging force from the fourth coil spring 16, and the release lever locking portion 14a. And the release lever 9 are moved to a position (engagement release position) where the engagement between the release lever 9 and the first holding lever engaging portion 9d can be released. When the first holding lever 14 moves to the disengagement position, the engagement between the release lever locking portion 14a of the first holding lever 14 and the first holding lever engaging portion 9d of the release lever 9 is released. The lever 9 rotates counterclockwise in FIG. 6 by the urging force from the third coil spring 11. Therefore, the ratchet 5 rotates clockwise in FIG. 5 by the urging force from the second coil spring 7 and returns to the initial position where it contacts the stopper 8 from the mesh release position. Therefore, when the latch 2 reaches from the full latch position to the open position beyond the half latch position, the door lock device is in the state shown in FIGS.

  When the latch 2 reaches the open position, the hook portion 2b is accommodated in the latch case 1, and the striker S can be detached from the striker engaging groove 2a of the latch 2 and the striker entry groove 1S of the latch case 1. Therefore, when the back door is moved in the opening door direction, the striker S is disengaged from the striker engagement groove 2a of the latch 2 and the striker entry groove 1S of the latch case 1, as shown in FIGS. 7 and 8, and the back door is opened. be able to. When the latch 2 reaches the open position, for example, the hook portion 2b engages with a locking portion (not shown) provided in the latch case 1, and the counterclockwise direction in FIG. Rotation is prevented.

  Thereafter, when the back door is closed, the striker S enters the striker entry groove 1S of the latch case 1 and the striker engagement groove 2a of the latch 2, and the latch 2 is engaged with the striker S. When the striker S moves to the back side of the striker entry groove 1S, the latch 2 rotates clockwise in FIG. 8 against the urging force from the first coil spring 4 and reaches the half latch position. At this time, the ratchet 5 is in an initial position, that is, a position where it can mesh with the latch 2 as shown in FIG. Therefore, when the latch 2 reaches the half latch position from the open position, the meshing portion 5 a of the ratchet 5 meshes with the half latch locking portion 2 d of the latch 2. Therefore, when the latch 2 reaches the half latch position from the open position, the door lock device is in the state shown in FIG. 9, and the latch 2 can be temporarily held at the half latch position.

  Thereafter, when the striker S moves further to the deeper side of the striker entry groove 1S, the latch 2 rotates clockwise in FIG. 9 against the urging force from the first coil spring 4 and reaches the full latch position. As a result, as shown in FIG. 3, the meshing portion 5a of the ratchet 5 meshes with the full latch locking portion 2c of the latch 2, and the back door is fully closed.

  On the other hand, in a vehicle in which the door lock device of this embodiment is attached to the back door, when an open handle provided in the vehicle is operated to open the back door, the operation is performed by the open door operation receiving portion 13a of the second operation lever 13. Is transmitted to. When the operation of the open handle (pressing of the transmission member) is received by the open door operation receiving portion 13 a, the second operation lever 13 rotates counterclockwise in FIG. 3, and the release lever driving portion 13 b is the second of the release lever 9. The operation receiving part 9c is pressed. When the release lever 9 receives a pressure from the second operation lever 13, the release lever 9 rotates clockwise in FIG. 4 and presses the action portion 5 b of the ratchet 5. When the ratchet 5 is pressed by the release lever 9, it rotates counterclockwise in FIG. 3 against the urging force from the second coil spring 7 and moves to the mesh release position. When the ratchet 5 moves to the engagement release position, the engagement between the full latch locking portion 2c of the latch 2 and the engagement portion 5a of the ratchet 5 is released, so that the latch 2 is driven by the biasing force from the first coil spring 4. 3 rotates counterclockwise. Therefore, when the operation of the open handle is transmitted to the second operation lever 13, the door lock device is in the state shown in FIGS.

  Also, when the release lever 9 rotates clockwise in FIG. 4 to move the ratchet 5 to the mesh release position, as shown in FIGS. 10 and 11, the first holding lever engaging portion 9 d of the release lever 9. Engages with the release lever locking portion 14 a of the first holding lever 14. The first holding lever 14 engaged with the release lever 9 is applied with the counterclockwise urging force in FIG. 11 by the fourth coil spring 16. Therefore, even if the second operation lever 13 returns to the initial position, the release lever 9 and the ratchet 5 are held in the state shown in FIGS. 10 and 11 as long as the engagement between the release lever 9 and the first holding lever 14 is not released. Is done. Therefore, even when the latch 2 reaches the half latch position, the ratchet 5 is held at the mesh release position, and the meshing portion 5a of the ratchet 5 does not mesh with the half latch locking portion 2d of the latch 2. Therefore, the latch 2 goes to the open position beyond the half latch position.

  The first operation lever 12 does not move even when the release lever 9 is rotated by the second operation lever 13. Therefore, the rotation of the release lever 9 due to the operation of the open handle provided in the vehicle is not transmitted to the transmission member or the key cylinder connected to the first operation lever 12.

  Although illustration is omitted, when the latch 2 moves beyond the half-latch position to the open position, the second holding lever driving portion 2e provided in the latch 2 presses the second holding lever 17 on the way to the open position. . Therefore, even when the ratchet 5 is moved to the mesh release position by the second operation lever 13, when the latch 2 reaches the open position, as shown in FIGS. 7 and 8, the first holding lever 14 and the release lever 9 Is released, and the release lever 9 and the ratchet 5 return to the initial positions, in other words, the engagement portion 5a of the ratchet 5 returns to the position where it can engage with the full latch engagement portion 2c and the half latch engagement portion 2d of the latch 2. When the release lever 9 returns to the initial position, the second operation lever 13 also returns to the initial position by pressing the release lever 9 from the second operation receiving portion 9c.

  As described above, the door lock device of the present embodiment operates either the open door device linked to the first operation lever 12 or the open door device linked to the second operation lever 13 to operate the latch 2 and the ratchet at the full latch position. Even when the engagement of 5 is released, the engagement of the latch 2 and the ratchet 5 at the half latch position can be prevented. Furthermore, the door lock device of the present embodiment can engage the latch 2 and the ratchet 5 at the half latch position when the back door is closed. Therefore, when the back door is opened, the back door can be opened and closed without being aware that the latch 1 and the ratchet 5 do not mesh at the half latch position, and convenience is not impaired.

  As described above, the door lock device of the present embodiment is provided with the mesh release mechanism on the side where the rotation center (the ratchet shaft 6) of the ratchet 5 is located with the striker entry groove 1S in the latch case 1 as a boundary. A holding mechanism is disposed on the side where the center of rotation 2 (latch shaft 3) is located. The release lever 9 and the ratchet 5 are brought into contact with each other in the latch case 1, and the second holding lever 17 is disposed in the latch case 1. Therefore, in the door lock device of this embodiment, the lever disposition portion 103b for disposing the mesh release mechanism and the holding mechanism can be reduced, and the door lock device can be downsized.

  In addition, the second operation lever 13 in the door lock device of the present embodiment is overlapped with the ratchet 5 so as to contact the second operation receiving portion 9c located between the rotation center of the release lever 9 and the ratchet contact portion 9a. It is arranged and supported rotatably on the ratchet shaft 6. In addition, the ratchet 5, the release lever 9, and the second operation lever 13 are arranged such that the ratchet contact portion 9 a and the first operation receiving portion 9 b are displaced in the axial direction of the ratchet shaft 6. Therefore, the second operation lever 13 can be efficiently disposed in the latch case 1 and the contact position between the ratchet 5 and the release lever 9 and the contact position between the second operation lever 13 and the release lever 9 can be determined. It can be set efficiently in the latch case 1. That is, the door lock device of the present embodiment prevents the door lock device from being enlarged by providing the second operation lever 13.

  Furthermore, the door lock device of the present embodiment moves the ratchet 5 to the mesh release position by moving the release lever 9 with the first operation lever 12 or the second operation lever 13, and the release lever 9 is the first holding lever. The first operating lever 12 and the second operating lever 13 can return to the initial positions even in the state where they are engaged with 14 (that is, the state where the ratchet 5 is held at the mesh release position). Therefore, for example, it is not necessary to provide the first operating lever 12 and the second operating lever 13 with a long hole for releasing the release lever 9. Therefore, in the door lock device of the present embodiment, the mesh release mechanism and the holding mechanism can be reduced in size, and the door lock device can be further reduced in size.

  In addition, the door lock device of the present embodiment is configured such that the ratchet 5 can be moved to the mesh release position by either the first operation lever 12 or the second operation lever 13. Therefore, in the door lock device of the present embodiment, the open door device (open handle) provided in the vehicle and the open door device (key cylinder) provided in the back door can be connected to different operation levers. Therefore, it becomes easy to prevent the interference of the transmission member that transmits the operation of the open door device to the door lock device, and the configuration of the transmission member can be simplified. In particular, since the second operation lever 13 protrudes from the opening 103d provided on the side surface of the latch case 1, when the door lock device of this embodiment is attached to the back door, the operation of the open door device provided in the vehicle is performed. Can be arranged on the vehicle body side, that is, in the vicinity of the striker S provided on the vehicle body. In that case, the transmission member for transmitting the operation of the open door device provided in the vehicle to the door lock device can be arranged without greatly detouring by a method such as drawing into the internal space of the back door through the vicinity of the hinge. Therefore, when the door lock device of this embodiment is attached to the back door, the configuration of the transmission member that transmits the operation of the open door device provided in the vehicle to the door lock device can be further simplified.

  In addition, in the door lock device of the present embodiment, the first holding lever 14 is arranged on the surface of the lever arrangement portion 103b facing the end side where the entrance of the striker entry groove 1S is located, and the second holding lever 17 is The cover portion 103a is disposed on the surface facing the latch 2. Therefore, the first holding lever driving portion 17b of the second holding lever 17 and the action portion 14b of the first holding lever 14 can be engaged at the extended ends, and the first holding lever 14 and the release lever 9 are engaged. It is possible to simplify the configuration for canceling.

  In addition, when the door lock device of this embodiment is attached to the back door, when the opened back door is closed, the latch 2 and the ratchet 5 can be engaged at the half latch position as in the conventional case. Therefore, when the back door is opened, the back door can be opened and closed without being aware that the latch 2 and the ratchet 5 do not mesh at the half latch position, and convenience is not impaired.

(Embodiment 2)
FIG. 12 is a plan view showing a schematic configuration inside the latch case 1 in the door lock device according to the second embodiment of the present invention. FIG. 13 is a front view showing a schematic configuration inside the latch case.

  The door lock device of this embodiment includes a latch case 1, a latch mechanism, a meshing release mechanism, and a holding mechanism, which are configured as shown in FIGS. The door lock device of the present embodiment differs from the door lock device of the first embodiment in that the ratchet 5 is provided with an open door operation receiving portion 5c and the second operation lever 13 is omitted, and the second holding lever 17 There are three points: a point where the holding method is changed, and a point where the timing of releasing the engagement between the release lever 9 and the first holding lever 14 is changed.

  The latch case 1 includes a body 101, a cover plate 102, and a back plate 103.

  The latch mechanism includes a latch 2, a latch shaft 3, a first coil spring 4, a ratchet 5, a ratchet shaft 6, and a second coil spring 7.

  The latch 2 has a striker engagement groove 2a, a hook portion 2b, a full latch engagement portion 2c, a half latch engagement portion 2d, and a second holding lever drive portion 2e, and is attached to the latch case 1. The latch shaft 3 is rotatably supported. The latch 2 is engaged with the first coil spring 4 so that the counterclockwise biasing force in FIG. 12 due to the elastic restoring force of the first coil spring 4 attached to the latch shaft 3 always acts.

  The striker engaging groove 2a, the hook portion 2b, the full latch locking portion 2c, and the half latch locking portion 2d are provided in the same manner as the latch 2 shown in the first embodiment. The second holding lever driving unit 2e is a portion that presses the second holding lever 17 and rotates the second holding lever 17 clockwise in FIG. 12 when the latch 2 rotates from the half latch position to the full latch position. is there.

  The ratchet 5 has a meshing part 5 a, an action part 5 b, and an open door operation receiving part 5 c, and is rotatably supported by a ratchet shaft 6 attached to the latch case 1. The ratchet 5 is engaged with the second coil spring 7 so that the clockwise urging force in FIG. 12 due to the elastic restoring force of the second coil spring 7 attached to the ratchet shaft 6 always acts. The ratchet 5 is prevented from rotating clockwise in FIG. 12 at a predetermined rotational position (initial position) by a stopper 8 attached to the latch case 1 (cover plate 102).

  The meshing part 5a and the action part 5b are provided in the same manner as the ratchet 5 shown in the first embodiment. The open door operation receiving portion 5c is a portion that comes into contact with a transmission member that transmits an operation of an open door device (for example, an open handle) provided in the vehicle to the ratchet 5, and receives pressure from the transmission member. The open door operation receiving portion 5 c corresponds to the open door operation receiving portion 13 a in the second operation lever 13 shown in the first embodiment, and protrudes out of the latch case 1 through the opening 103 d provided in the latch case 1. The transmission member and the open door operation receiving portion 5c are brought into contact so that the ratchet 5 rotates counterclockwise in FIG. 12 when the open door device is operated.

  The latch 2 and the ratchet 5 are arranged so that the rotation center of the latch 2 (latch shaft 3) and the rotation center of the ratchet 5 (ratchet shaft 6) are in a positional relationship with the striker entry groove 1S interposed therebetween.

  The mesh release mechanism includes a release lever 9, a release lever shaft 10, a third coil spring 11, and a first operation lever 12.

  The release lever 9 has a ratchet contact portion 9a, a first operation receiving portion 9b, and a first holding lever engaging portion 9d, and is rotatably supported by a release lever shaft 10 attached to the lever arrangement portion 103b. It is. The release lever 9 is engaged with the third coil spring 11 so that the counterclockwise biasing force in FIG. 4 due to the elastic restoring force of the third coil spring 11 attached to the release lever shaft 10 always acts.

  The ratchet contact portion 9a, the first operation receiving portion 9b, and the first holding lever engaging portion 9d are provided in the same manner as the release lever 9 shown in the first embodiment. The first operating lever 12 is provided in the same manner as that shown in the first embodiment.

  The holding mechanism includes a first holding lever 14, a first holding lever shaft 15, a fourth coil spring 16, and a second holding lever 17. The first holding lever 14 is provided in the same manner as that shown in the first embodiment.

  The second holding lever 17 has a latch contact portion 17a and a first holding lever drive portion 17b, and is rotatably supported by the latch shaft 3. The second holding lever 17 is housed in the latch case 1 except for the first holding lever driving portion 17b.

  The latch contact portion 17a contacts the second holding lever drive portion 2e of the latch 2 when the latch 2 rotates clockwise in FIG. 12 and moves from the half latch position to the full latch position, and the second holding lever drive portion 2e. This is a portion for rotating the second holding lever 17 clockwise in FIG. The first holding lever driving portion 17b is out of the latch case 1 through the opening 103e provided in the back plate 103 (latch case 1), and when the second holding lever 17 rotates clockwise in FIG. This is a portion that contacts the first holding lever 14 in the direction in which the engagement between the first holding lever 14 and the release lever 9 is released.

  As described above, the door lock device of the present embodiment is provided with the mesh release mechanism on the side where the rotation center (the ratchet shaft 6) of the ratchet 5 is located with the striker entry groove 1S in the latch case 1 as a boundary. A holding mechanism is disposed on the side where the rotation center (latch shaft 3) is located. The release lever 9 and the ratchet 5 are brought into contact with each other in the latch case 1, and the second holding lever 17 is disposed in the latch case 1. Therefore, in the door lock device of this embodiment, the lever disposition portion 103b for disposing the mesh release mechanism and the holding mechanism can be reduced, and the door lock device can be downsized.

  Furthermore, in the door lock device of the present embodiment, the open door operation receiving portion 5c provided in the ratchet 5 is protruded out of the latch case 1 through the opening 103d provided in the side surface of the latch case 1, so that the door lock of the first embodiment is obtained. The second operation lever 13 in the apparatus is omitted. Therefore, the door lock device of the present embodiment can be made smaller than the door lock device of the first embodiment.

  Next, the operation of the door lock device according to this embodiment will be described. In the following description of the operation, the state shown in FIGS. 12 and 13, that is, the latch 2 engaged with the striker S meshes with the ratchet 5 at the full latch position, and the back door is fully closed with respect to the vehicle. Start from where it is.

  FIG. 14 is a plan view showing a state of the door lock device when the latch and the ratchet in the full latch position are released by the operation of the open door device linked to the first operation lever and the latch reaches the half latch position. . FIG. 15 is a front view of the door lock device shown in FIG. FIG. 16 is a plan view showing a state of the door lock device when the latch reaches the open position beyond the half latch position shown in FIG. 14. 17 is a front view of the door lock device shown in FIG. FIG. 18 is a plan view showing a state of the door lock device immediately after the latch and the ratchet are disengaged in the full latch position by pressing the open door operation receiving portion of the ratchet. FIG. 19 is a plan view showing a state of the door lock device when the latch reaches the half latch position from the position shown in FIG. 20 is a front view of the door lock device shown in FIG. FIG. 21 is a plan view showing the state of the door lock device when the latch and the ratchet are disengaged at the half latch position shown in FIG. 19 by the pressing of the open door operation receiving portion of the ratchet and the latch reaches the open position. FIG. FIG. 22 is a front view of the door lock device shown in FIG.

  In a vehicle in which the door lock device of this embodiment is attached to a back door, when a key is inserted into a key cylinder provided in the back door and rotated, the operation is transmitted to the first operation lever 12. When the opening operation by the key cylinder is performed, the first operation lever 12 rotates clockwise in FIG. 13, and the release lever driving unit 12 b presses the first operation receiving unit 9 b of the release lever 9. When the release lever 9 receives a pressure from the first operation lever 12, the release lever 9 rotates clockwise in FIG. 4 and presses the action portion 5 b of the ratchet 5. When the ratchet 5 is pressed by the release lever 9, it rotates counterclockwise in FIG. 12 against the urging force from the second coil spring 7 and moves to the mesh release position. When the ratchet 5 moves to the engagement release position, the engagement between the full latch locking portion 2c of the latch 2 and the engagement portion 5a of the ratchet 5 is released, so that the latch 2 is driven by the biasing force from the first coil spring 4. 3 rotates counterclockwise. Therefore, when the engagement of the latch 2 and the ratchet 5 in the full latch position is released by the operation of the first operation lever 12 (key cylinder), the door lock device at the time when the latch 2 reaches the half latch position is shown in FIG. And it will be in the state shown in FIG.

  When the release lever 9 rotates clockwise in FIG. 13 to move the ratchet 5 to the mesh release position, the first holding lever engaging portion 9d of the release lever 9 is moved to the first position as shown in FIGS. 1 The engaging lever 14a of the holding lever 14 is engaged. The first holding lever 14 engaged with the release lever 9 is applied with the counterclockwise urging force in FIG. 15 by the fourth coil spring 16. Therefore, even when the first operation lever 12 returns to the initial position indicated by the two-dot chain line in FIG. 15, that is, the position before the key cylinder is operated, the engagement between the release lever 9 and the first holding lever 14 is maintained. As long as the release lever 9 and the ratchet 5 are not released, the states shown in FIGS. 14 and 15 are maintained. That is, even when the latch 2 reaches the half latch position, the ratchet 5 is held at the mesh release position, and the meshing portion 5a of the ratchet 5 does not mesh with the half latch locking portion 2d of the latch 2. Therefore, the latch 2 goes to the open position beyond the half latch position.

  When the first holding lever engaging portion 9d of the release lever 9 is engaged with the release lever locking portion 14a of the first holding lever 14, the second operating lever 13 is moved by the latch 2 as shown in FIGS. It is held at a position rotated counterclockwise in FIG. 12 than in the full latch position. The first holding lever engaging portion 9d and the release lever locking portion 14a are engaged by pressing the latch contact portion 17a of the second holding lever 17 with the second holding lever driving portion 2e provided on the latch 2. Canceled. As described above, the second holding lever drive unit 2e contacts and presses the latch contact portion 17a when the latch 2 moves from the half latch position to the full latch position. Therefore, even when the latch 2 reaches the open position, the engagement between the release lever 9 and the first holding lever 14 is not released. Therefore, when the engagement between the latch 2 and the ratchet 5 in the full latch position is released by the operation of the first operation lever 12 (key cylinder), when the latch 2 reaches the open position beyond the half latch position from the full latch position, The door lock device is in the state shown in FIGS. 16 and 17. That is, in the locking device of the present embodiment, when the mesh release operation is performed via the first operation lever 12, even if the latch 2 reaches the open position, the second operation lever 13 is more than when the latch 2 is in the full latch position. Is also held at a position rotated counterclockwise in FIG.

  When the latch 2 reaches the open position, the hook portion 2b is accommodated in the latch case 1, and the striker S can be detached from the striker engaging groove 2a of the latch 2 and the striker entry groove 1S of the latch case 1. Therefore, when the back door is moved in the opening door direction, the striker S is disengaged from the striker engagement groove 2a of the latch 2 and the striker entry groove 1S of the latch case 1 as shown in FIGS. 16 and 17, and the back door is opened. be able to. When the latch 2 reaches the open position, for example, the hook portion 2b engages with a locking portion (not shown) provided in the latch case 1, and the counterclockwise direction in FIG. Rotation is prevented.

  Thereafter, when the back door is closed, the striker S enters the striker entry groove 1S of the latch case 1 and the striker engagement groove 2a of the latch 2, and the latch 2 is engaged with the striker S. When the striker S moves to the back side of the striker entry groove 1S, the latch 2 rotates clockwise in FIG. 16 against the urging force from the first coil spring 4 and reaches the half latch position. At this time, the ratchet 5 remains held at the mesh release position as shown in FIG. Therefore, even if the latch 2 reaches the half latch position from the open position, the meshing portion 5a of the ratchet 5 does not mesh with the half latch locking portion 2d of the latch 2.

  Thereafter, when the striker S moves further to the deeper side of the striker entry groove 1S, the latch 2 rotates clockwise in FIG. 16 against the biasing force from the first coil spring 4 and reaches the full latch position. When the latch 2 goes to the full latch position beyond the half-latch position, the second holding lever drive part 2e provided on the latch 2 comes into contact with and presses the latch abutting part 17a of the second holding lever 17 in the middle. When the second holding lever 17 receives a pressure from the second holding lever driving unit 2e, the second holding lever 17 rotates clockwise in FIG. 16, and the first holding lever driving unit 17b presses the action portion 14b of the first holding lever 14. . When the first holding lever 14 is pressed by the second holding lever 17, it rotates counterclockwise in FIG. 17 against the urging force from the fourth coil spring 16, and releases the release lever locking portion 14a. The lever 9 moves to a position (engagement release position) where the engagement with the first holding lever engaging portion 9d can be released. When the first holding lever 14 moves to the disengagement position, the engagement between the release lever locking portion 14a of the first holding lever 14 and the first holding lever engaging portion 9d of the release lever 9 is released. The lever 9 rotates counterclockwise in FIG. 17 by the biasing force from the third coil spring 11. Therefore, the ratchet 5 rotates clockwise in FIG. 16 by the urging force from the second coil spring 7 and returns to the initial position where it contacts the stopper 8 from the mesh release position. Therefore, when the latch 2 reaches the full latch position from the open position beyond the half latch position, the door lock device returns to the state shown in FIGS. As a result, as shown in FIG. 16, the engagement portion 5a of the ratchet 5 is engaged with the full latch engagement portion 2c of the latch 2, and the back door is fully closed.

  On the other hand, in a vehicle in which the door lock device of the present embodiment is attached to the back door, when an open handle provided in the vehicle is operated to open the back door, the operation is transmitted to the open door operation receiving portion 5c of the ratchet 5. The The ratchet 5 rotates counterclockwise in FIG. 12 against the urging force from the second coil spring 7 when the operation of the open handle (pressing of the transmission member) is received by the open door operation receiving portion 5c, and the engagement is released. Move to position. When the ratchet 5 moves to the engagement release position, the engagement between the full latch locking portion 2c of the latch 2 and the engagement portion 5a of the ratchet 5 is released, so that the latch 2 is driven by the biasing force from the first coil spring 4. Rotate counterclockwise at 12. Therefore, when the operation of the open handle is transmitted to the ratchet 5, the door lock device immediately after the engagement between the latch 2 and the ratchet 5 is released is in the state shown in FIG.

  When the ratchet 5 is directly moved to the mesh release position by operating the open handle, the release lever 9 does not move. Therefore, when the open handle is returned to the original position (the position before the operation) immediately after the open handle is operated, the ratchet 5 rotates clockwise by the urging force from the second coil spring 7, and is shown by a two-dot chain line in FIG. As a result, it contacts the latch 2.

  Thereafter, when the latch 2 is rotated counterclockwise in FIG. 18 by the urging force from the first coil spring 4 to reach the half latch position, the half latch engaging portion 2d of the latch 2 and the meshing portion 5a of the ratchet 5 are connected. Mesh. Therefore, if the back door does not open to the point where the latch 2 exceeds the half-latch position, for example, because the open door operation time by the open handle is short, or the movement of the back door becomes slow due to freezing, the latch 2 When the door reaches the half latch position, the door lock device is in the state shown in FIGS.

  If the latch 2 and the ratchet 5 are engaged at the half latch position even though the open door is operated by the open handle, the open door operation by the open handle is performed again, and the latch 2 at the half latch position is Release the mesh with the ratchet 5. Then, the latch 2 rotates counterclockwise in FIG. 19 by the urging force from the first coil spring 4 and reaches the open position. Accordingly, when the engagement of the latch 2 and the ratchet 5 in the full latch position is released by the pressing of the open door operation receiving portion 5c of the ratchet 5, when the latch 2 reaches the open position beyond the half latch position from the full latch position, The locking device is in the state shown in FIGS. 21 and 22.

  When the ratchet 5 is moved directly to the mesh release position by operating the open handle, the release lever 9 and the first operation lever 12 do not move. Therefore, the movement of the ratchet 5 due to the operation of the open handle provided in the vehicle is not transmitted to the transmission member or the key cylinder connected to the first operation lever 12.

  Although not shown, when the ratchet 5 is directly moved to the mesh release position by operating the open handle and the latch 2 is moved from the full latch position to the open position, the release lever 9 and the first holding lever 14 are not engaged. Since they do not match, the ratchet 5 can swing between the initial position and the mesh release position. Therefore, when the ratchet 5 is directly moved to the mesh release position by operating the open handle and the latch 2 is moved from the full latch position to the open position, when the back door is subsequently closed, the ratchet is reached when the latch 2 reaches the half latch position. 5 meshing portion 5a meshes with half latch locking portion 2d of latch 2.

  As described above, the door lock device of the present embodiment operates in the half latch position when the open door device linked to the first operation lever 12 is operated to release the engagement between the latch 2 and the ratchet 5 in the full latch position. This prevents the latch 2 and the ratchet 5 from engaging with each other. Furthermore, in the door lock device of the present embodiment, when the first operating lever 12 is operated to move the latch 2 to the open position and the back door is opened, the back door is closed at the half latch position in the operation immediately after that. 2 and ratchet 5 do not mesh. Therefore, when the back door is opened and closed from the outside of the vehicle, it is possible to prevent a half door state due to the engagement of the latch 2 and the ratchet 5 at the half latch position, and in other cases, the back door opening and closing operation similar to the conventional can be performed. Convenience is improved.

  As described above, the door lock device of the present embodiment is provided with the mesh release mechanism on the side where the rotation center (the ratchet shaft 6) of the ratchet 5 is located with the striker entry groove 1S in the latch case 1 as a boundary. A holding mechanism is disposed on the side where the center of rotation 2 (latch shaft 3) is located. The release lever 9 and the ratchet 5 are brought into contact with each other in the latch case 1, and the second holding lever 17 is disposed in the latch case 1. Further, the release lever 9 is moved by the first operating lever 12 to move the ratchet 5 to the mesh release position, and the release lever 9 is engaged with the first holding lever 14 (that is, the ratchet 5 is brought to the mesh release position). The first operating lever 12 can return to the initial position even in the held state. Therefore, it is not necessary to provide the first operating lever 12 with a long hole for releasing the release lever 9, for example. Therefore, in the door lock device of this embodiment, the lever disposition portion 103b for disposing the mesh release mechanism and the holding mechanism can be reduced, and the door lock device can be downsized.

  Further, the door lock device of the present embodiment projects the door operation receiving portion 5c provided on the ratchet 5 from the opening 103d provided on the side surface of the latch case 1 to the outside of the latch case 1, thereby allowing the door lock of the first embodiment. The second operation lever 13 in the apparatus is omitted. Therefore, the door lock device of the present embodiment can be made smaller than the door lock device of the first embodiment.

  Moreover, the door lock device of the present embodiment is configured such that the ratchet 5 can be moved to the mesh release position by either the first operation lever 12 or the open door operation receiving portion 5c of the ratchet 5. Therefore, in the door lock device of the present embodiment, the open door device (open handle) provided in the vehicle and the open door device (key cylinder) provided in the back door can be connected to different operation levers. Therefore, it becomes easy to prevent the interference of the transmission member that transmits the operation of the open door device to the door lock device, and the configuration of the transmission member can be simplified. In particular, since the open door operation receiving portion 5c provided on the ratchet 5 protrudes from the opening 103d provided on the side surface of the latch case 1, when the door lock device of this embodiment is attached to the back door, it is provided in the vehicle. The parts that transmit the operation of the open door device to the open door operation receiving portion 5c (ratchet 5) can be arranged on the vehicle body side, that is, in the vicinity of the striker S provided on the vehicle body. In this case, the transmission member that transmits the operation of the open door device provided in the vehicle to the door lock device does not have to be drawn into the internal space of the back door through the vicinity of the hinge. Therefore, when the door lock device of this embodiment is attached to the back door, the configuration of the transmission member that transmits the operation of the open door device provided in the vehicle to the door lock device can be further simplified.

  In addition, in the door lock device of the present embodiment, the first holding lever 14 is arranged on the surface of the lever arrangement portion 103b facing the end side where the entrance of the striker entry groove 1S is located, and the second holding lever 17 is The cover portion 103a is disposed on the surface facing the latch 2. Therefore, the first holding lever driving portion 17b of the second holding lever 17 and the action portion 14b of the first holding lever 14 can be engaged at the extended ends, and the first holding lever 14 and the release lever 9 are engaged. It is possible to simplify the configuration for canceling.

  Moreover, when the door lock device of the present embodiment is attached to the back door, when the back door is opened and closed from the outside of the vehicle, the latch 2 and the ratchet 5 in the half latch position can be prevented from being brought into a half door state. In other cases, the opening / closing operation of the back door can be performed in the same manner as the conventional case, so that convenience is improved.

  The door lock device according to the present invention has been specifically described above based on the above embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention. Of course there is. For example, the mesh release mechanism and the holding mechanism in the door lock device according to the present invention are not limited to the combinations shown in the above embodiment, and the mesh release mechanism of the first embodiment and the holding mechanism of the second embodiment may be combined. Of course, the holding mechanism of the first embodiment and the mesh release mechanism of the second embodiment may be combined.

DESCRIPTION OF SYMBOLS 1 Latch case 101 Body 102 Cover plate 102a Screw hole 102b Mounting part 103 Back plate 103a Cover part 103b Lever arrangement part 103c, 103d, 103e Opening 1S Strike entry groove 2 Latch 2a Striker engagement groove 2b Hook part 2c Full latch latching part 2d Half latch locking part 2e 2nd holding lever drive part 3 Latch shaft 4 1st coil spring 5 Ratchet 5a Engagement part 5b Action part 5c Opening door operation receiving part 6 Ratchet shaft 7 2nd coil spring 8 Stopper 9 Release lever 9a Ratchet Contact portion 9b First operation receiving portion 9c Second operation receiving portion 9d First holding lever engaging portion 10 Release lever shaft 11 Third coil spring 12 First operation lever 12a Transmission member connecting portion 12b Release lever driving portion 13 Second Operation -13a Open door operation receiving portion 13b Release lever drive portion 14 First holding lever 14a Release lever locking portion 14b Action portion 15 First holding lever shaft 16 Fourth coil spring 17 Second holding lever 17a Latch contact portion 17b First Holding lever drive unit 18 Second holding lever shaft S Striker

Claims (6)

When the latch engaged with the striker reaches the full latch position or the half latch position, the ratchet meshes with the latch, and when the latch engages with the ratchet, the latch reaches the open position, and the latch A mesh release mechanism that moves the meshed ratchet from a mesh position to a mesh release position, and the latch that is half when the ratchet meshed with the latch at the full latch position is moved to the mesh release position by the mesh release mechanism. In a door lock device that includes a holding mechanism that holds the ratchet in the mesh release position until it goes to the open position beyond the latch position, and a latch case that houses the latch mechanism, and is attached to a back door of an automobile .
The latch case has a striker entry groove into which the striker enters,
The latch and the ratchet are rotatable with respect to the latch case, and are arranged so that the rotation center of the latch and the rotation center of the ratchet are positioned on both sides of the striker entry groove. And
The mesh release mechanism includes a release lever that is rotatably arranged with respect to the door lock device, and the release lever is capable of moving the ratchet from a mesh position to a mesh release position.
The holding mechanism includes a first holding lever disposed rotatably with respect to the door lock device, and a second holding lever disposed within the latch case so as to be rotatable with respect to the latch case,
The rotation axis of the first holding lever and the rotation axis of the second holding lever are arranged on the side where the rotation center of the latch is located with the striker groove as a boundary,
The first holding lever engages with the release lever when the release lever moves the ratchet from the mesh position to the mesh release position, and holds the ratchet at the mesh release position. When the latch reaches a predetermined position, it engages with the latch to move the first holding lever from the engagement position with the release lever to the disengagement position,
The rotation axis of the release lever is disposed on the side where the rotation center of the ratchet is located with the striker groove as a boundary,
The release lever and the ratchet can be contacted on the side where the rotation center of the ratchet is located with the striker entry groove as a boundary,
The second holding lever and its axis of rotation, Ri the striker entry groove disposed on side rotation center of the latch as a boundary tare,
The mesh release mechanism is individually linked to an open door device provided in the back door and an open door device provided in the vehicle, and operates when the corresponding open door device is operated, and the ratchet A first operating lever and a second operating lever for moving from the meshing position to the meshing release position;
The ratchet is pivotally supported on a ratchet shaft provided in the latch case,
Provided with a lever arrangement portion protruding from the latch case,
The first operation lever is pivotally supported on the rotation shaft of the release lever provided in the lever arrangement portion,
The door lock device, wherein the second operation lever is pivotally supported on the ratchet shaft . Before Symbol first operating lever and said second lever is moved to the meshing release position the ratchet via the release lever lever is disposed in the disposing portion provided outside of said latch casing, said release lever Is rotatably supported by the lever arrangement portion by a release lever shaft,
The ratchet is rotatably supported by the ratchet shaft provided in the latch casing,
The ratchet contact portion of the release lever that contacts the ratchet when the ratchet is moved from the mesh position to the mesh release position, and the second operation lever when the ratchet is moved from the mesh position to the mesh release position. 2. The door lock device according to claim 1, wherein the second operation receiving portion of the release lever in contact with the release lever is displaced in an axial direction of the ratchet shaft. The latch case includes a concave cover plate that can store the latch mechanism, and a back plate that covers an opening surface side of the cover plate,
The back plate includes a cover portion, wherein a surface facing the end side there is entrance of the striker entry groove consists of a said lever arrangement portion, and the lever arrangement portion and the cover portion is the boundary The cover plate is positioned in the vicinity of the end opposite to the end where the striker entrance groove is located, is substantially L-shaped in a side view, and the lever disposition portion is located with respect to the cover portion. Bend away from the
One end of the release lever enters the latch case through an opening provided in the latch case, and is disposed in the lever disposition portion in such a manner that the ratchet can be moved from the mesh release position to the mesh release position. ,
The first holding lever is disposed in the lever disposition portion,
One end of the second holding lever passes through an opening provided in the latch case and comes out of the latch case, so that the first holding lever can be moved from the engagement position with the release lever to the disengagement position. The door lock device according to claim 1, wherein the door lock device is disposed on a surface of the cover portion facing the latch.   The release lever and the first holding lever have an engagement position between the release lever and the first holding lever on a surface of the lever disposition portion facing the end portion where the entrance of the striker entry groove is located. The door lock device according to claim 3, wherein the door lock device is disposed so as to be within a mutual rotation range.   The engagement of the first holding lever with the release lever is released when the latch moves from the half latch position to the open position. The door lock device according to item.   The first holding lever is disengaged from the release lever when the latch moves from the half latch position to the full latch position. The door lock device according to item.

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