JP5437988B2 - Power closer device for vehicle door - Google Patents

Description

  The present invention relates to a power closer device for a vehicle door for shifting a latch unit in a half latch state to a full latch state.

  In a door latch device that applies to a door body of a vehicle such as a four-wheeled vehicle, a closing actuator is driven when the vehicle door body such as a slide door is in a half-closed state by a closing operation, and a latch in a half-latch state is performed. Some have a closer mechanism (power closer device) that causes the vehicle door to be fully closed by shifting the unit to the fully latched state. In the latch unit that has shifted to the fully latched state, the ratchet engages with the latch and its movement is restricted, so that the vehicle door body is kept closed with respect to the vehicle body.

  On the other hand, if the door opening operation such as operating the door handle is performed while the closing actuator is driven, the power transfer from the closing actuator to the latch unit is interrupted by the swing of the failsafe lever. And the transition from the half latch state to the full latch state is immediately stopped. At the same time, in the latch unit, the ratchet is released by the swinging of the open lever and the engagement with the latch is released (unlatched state), so that the opening movement of the vehicle door body is allowed. Therefore, for example, even when a foreign object is caught between the vehicle body and the vehicle door body during the transition from the half-latch state to the full-latch state, this can be canceled by performing the door opening operation. (For example, refer to Patent Document 1).

JP 2005-139790 A

  By the way, the device described in Patent Document 1 described above is an open system power transmission means for transmitting an opening operation to the open lever, and a closer system power transmission for transmitting the door handle opening operation to the fail safe lever of the closer mechanism. Means are provided individually. For this reason, for example, the link member and the wire cable for transmitting the door opening operation to the open lever are individually required for each power transmission means. Absent.

  In view of these problems, an apparatus is also provided in which an open lever and a failsafe lever are linked. According to the device in which the open lever and the fail safe lever are linked, it is only necessary to transmit the door opening operation to any one of them, so that the number of parts and the manufacturing cost can be reduced.

  However, it is known that members such as an open lever and a fail-safe lever of a closer mechanism are undesirably displaced by inertia force when the vehicle suddenly starts, stops suddenly, travels on a sharp curve, or travels on a rough road. In an apparatus in which an open lever and a fail-safe lever are linked, an undesired operation of a member such as a fail-safe lever of a closer mechanism affects the operation of the open lever, which is not preferable for the open lever. The influence may adversely affect the engagement state between the latch and the ratchet.

  In view of the above circumstances, an object of the present invention is to provide a power closer device for a vehicle door body that can prevent an influence on a latch unit and can reduce the number of parts and the manufacturing cost.

  Therefore, the present invention transmits the power of the closing actuator 140, the latch unit 20 that can be displaced from the half latch state to the full latch state by the power of the closing actuator 140, and the power of the closing actuator 140 to the latch unit 20. A power closing power transmission mechanism that switches between a possible connected state and a non-connected state that does not allow transmission, wherein the power closing power transmission mechanism is switched from the connected state to the unconnected state by an opening operation of a door handle OH. The power closing power transmission mechanism switches between a sector gear 240 that rotates by the operation of the closing actuator 140, a close plate 340 that can swing together with the sector gear 240, and an engaging position and a canceling position. position If there is a cancel plate 440 in which the sector gear 240 and the close plate 340 are connected to each other in the connected state so that the rotation of the sector gear 240 is not transmitted to the close plate 340 when in the cancel position. Urging means 444 for urging the cancel plate 440 from the cancel position toward the engagement position, and the center of gravity position of the cancel plate 440 is such that the closing actuator 140 is not operated and the engagement is performed. Of the vehicle door body set in the quadrant including the direction urged by the urging means 444 among the four quadrants defined by the horizontal line and the vertical line passing through the rotation center of the cancel plate 440. This is a power closer device.

  In addition, the present invention transmits the power of the closing actuator 140, the latch unit 20 that can be displaced from the half latched state to the full latched state by the power of the closing actuator 140, and the power of the closing actuator 140 to the latch unit 20. A power closing power transmission mechanism that switches between a possible connected state and a non-connected state that does not allow transmission, wherein the power closing power transmission mechanism is switched from the connected state to the unconnected state by an opening operation of a door handle OH. The power closing power transmission mechanism switches between a sector gear 240 that rotates by the operation of the closing actuator 140, a close plate 340 that can swing together with the sector gear 240, and an engaging position and a canceling position. position Then, the sector gear 240 and the close plate 340 are integrally connected to each other in the connected state, and when in the cancel position, the rotation of the sector gear 240 is not transmitted to the close plate 340 and the cancel plate 440 is in the non-connected state. Urging means 444 for urging the cancel plate 440 from the cancel position toward the engagement position, and the center of gravity position of the cancel plate 440 is such that the cancel plate 440 is moved from the cancel position to the engagement position. This is a power closer device for a vehicle door that is set so as to maintain the cancel plate 440 from the cancel position toward the engagement position in synergy with the biasing means 444 that biases toward the front.

  According to the present invention, since the closer mechanism is provided with the linking means for linking with the open lever, and the open lever is shifted to the non-transmission state by swinging in the door opening direction, the opening operation is individually performed for the closer mechanism. Therefore, it is possible to reduce the number of parts and the manufacturing cost. In addition, the closer mechanism sets the position of the center of gravity so that a force that maintains the power transmission state acts when an inertial force that swings the open lever in the door opening direction acts in the power transmission state. . Therefore, for example, even when an inertial force is applied to the vehicle, the closer mechanism maintained in the power transmission state does not cause the swing of the open lever in the door opening direction, which affects the engagement state between the latch and the ratchet. There is no fear of affecting.

It is the conceptual diagram which looked at the door latch apparatus to which the power closer apparatus of the vehicle door body which is embodiment of this invention was applied from the vehicle outer side. It is the conceptual diagram which looked at the door latch apparatus shown in FIG. 1 from the vehicle inside. It is the conceptual diagram which looked at the principal part of the door latch apparatus shown in FIG. 1 from upper direction. It is the conceptual diagram which looked at the principal part of the door latch apparatus shown in FIG. 1 from upper direction. It is a conceptual diagram of the latch unit applied to the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the unlatch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the half latch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the full latch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the non-operation state of the closer mechanism applied to the door latch apparatus shown in FIG. It is the top view which showed notionally the vehicle used as the application object of the door latch apparatus shown in FIG. 2 is a left side view conceptually showing a vehicle to which the door latch device shown in FIG. 1 is applied.

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

  1 to 4 show a door latch device to which a power closer device according to an embodiment of the present invention is applied. As shown in FIGS. 10 and 11, the door latch device exemplified here is applied to a sliding door D that is slidably disposed along the front-rear direction on the left side of the vehicle body B in a vehicle such as a four-wheeled vehicle. To do. The door latch device 1 is disposed at the vehicle rear side end portion of the slide door D, and regulates the opening movement of the slide door D with the striker S provided on the vehicle main body B.

  As shown in FIGS. 1 to 4, the door latch device 1 includes a latch unit 20 in a base plate 10. The base plate 10 is formed by appropriately forming a sheet metal, and an end portion located at the rear of the vehicle is bent toward the outside of the vehicle. The base plate 10 of the door latch device 1 is provided with a closer mechanism 40 of a power closer device.

  5 to 9 show the latch unit 20 and the closer mechanism 40 in an unfolded state. The latch unit 20 is configured to have a unit case 21 at the vehicle rear side end portion of the base plate 10. As shown in FIG. 5, the latch unit 20 includes a latch 22 and a ratchet 23 inside the unit case 21. A ratchet lever 24 and a latch lever 25 are provided outside the unit case 21.

  The latch 22 is configured by providing a meshing groove 22c between two claw portions 22a and 22b. The latch 22 is supported by a latch shaft 26 disposed on the base plate 10, and rotates around the axis of the latch shaft 26 along the direction of the arrow 26 A and the arrow 26 B in FIG. Is possible. Although not clearly shown in the drawing, a latch spring is provided between the latch 22 and the unit case 21 to urge the latch 22 in the direction of the arrow 26B in FIG. It is.

  The ratchet 23 is for locking the claws 22 a and 22 b of the latch 22, and is supported on a ratchet shaft 27 disposed on the base plate 10. The ratchet 23 rotates around the axis of the ratchet shaft 27 along the direction of the arrow 27A and the direction of the arrow 27B in FIG. 5 inside the unit case 21, and its tip can be attached to and detached from the latch 22. .

  As shown in FIGS. 1, 3, and 4, the ratchet lever 24 is supported on a portion of the ratchet shaft 27 that is outside the unit case 21. The ratchet lever 24 is linked to the ratchet 23 and can rotate around the axis of the ratchet shaft 27 in a manner interlocking with the rotation of the ratchet 23. Although not explicitly shown in the drawing, a ratchet spring is provided between the ratchet lever 24 and the base plate 10 to constantly bias the ratchet 23 in the direction of the arrow 27A in FIG. is there.

  The latch lever 25 is supported on a portion of the latch shaft 26 that is outside the unit case 21, extends from the latch shaft 26 in the radially outward direction, and has an abutment pin 28 at its extended end. doing. The contact pin 28 has a columnar shape, and is arranged at the extending end of the latch lever 25 in such a manner that its axis is parallel to the axis of the latch shaft 26. The latch lever 25 is linked to the latch 22 and can rotate around the axis of the latch shaft 26 in a manner interlocking with the rotation of the latch 22.

  In the latch unit 20, when the latch 22 rotates around the axis of the latch shaft 26, an unlatched state (see FIG. 6) in which the engagement groove portion 22 c is opened with respect to the striker entry groove 21 a formed in the unit case 21, and the striker The engagement groove portion 22c is displaced to the latched state with respect to the entry groove 21a. Further, in the latched state, the ratchet 23 is engaged in a claw portion 22a located in the back of the striker entry groove 21a (see FIG. 7), and the ratchet 23 is located in the front side of the striker entry groove 21a. There are two modes: a fully latched state engaged with 22b.

  When the latch unit 20 is in the half latched state with the striker S engaged, the slide door D is in a semi-closed state with respect to the vehicle body B, and the latch unit 20 is engaged with the striker S. Each dimension is set so that the slide door D is fully closed with respect to the vehicle main body B when it is in the fully latched state. Further, in the present embodiment, when the latch unit 20 is in the unlatched state, the contact pin 28 of the latch lever 25 is disposed at a position farthest from the striker entry groove 21a on the uppermost side of the vehicle. As the latch state and the full latch state are entered, the contact pin 28 gradually moves downward in the vehicle and gradually approaches the striker entry groove 21a.

  1 is a latch sensor for detecting the rotational displacement of the latch 22 with respect to the unit case 21.

  As shown in FIGS. 3 and 4, the door latch device 1 is provided with a support pin 31 at a bent portion 11 provided at an end of the base plate 10 at the rear of the vehicle, and via the support pin 31. The open lever 30 is supported so as to be swingable about the axis of the support pin 31. The bent portion 11 is a standing portion that is bent from the bent portion on the vehicle rear side toward the vehicle outer side in the base plate 10. The bearing pin 31 is arranged in such a manner that its axis is along the vertical direction of the vehicle at the tip of the bent portion 11.

  As shown in FIG. 3, the open lever 30 includes a weight support portion 30 a, a link connection portion 30 b, and a pressing piece portion 30 c that are integrally formed. In FIG. 3 (open lever 30 unopened door operation state), the weight support portion 30a extends from the axis of the support pin 31 toward the front of the vehicle, and a cylindrical weight 32 is provided at the extended end portion. I support it. The link connecting portion 30b extends from the axis of the support pin 31 toward the rear of the vehicle in FIG. 3 and then extends toward the inside of the vehicle. The intermediate portion of the link connecting portion 30b is bent so as to protrude downward from the vehicle, and one end portion of the wire cable W is held on the lower end surface thereof. 2, the other end of the wire cable W is connected to the control unit CU, and the inside handle IH and the outside handle OH (see FIGS. 10 and 11) of the slide door D via the control unit CU. ). As shown in FIGS. 1 and 3, the pressing piece portion 30c is a portion extending from the meeting portion of the weight support portion 30a and the link connection portion 30b toward the upper side of the vehicle. 3, when the open lever 30 swings counterclockwise (door opening direction) around the axis of the support pin 31 in FIG. 3, as shown in FIG. The ratchet lever 24 can be engaged with the ratchet lever 24 to rotate in the direction of arrow 27B, and the ratchet 23 can be rotated away from the latch 22 via the ratchet lever 24 (the opening direction of the open lever 30). Swing to).

  Further, as shown in FIGS. 1 and 2, the door latch device 1 includes a closer mechanism 40 of a power closer device on the base plate 10. The closer mechanism 40 shifts the latch unit 20 to a full latch state when the latch unit 20 is in a half latch state, and includes a closing actuator 140 and a main shaft 41.

  The closing actuator 140 includes an electric motor 141 and a pinion 142 that is rotationally driven by the electric motor 141, and the rotation axis of the pinion 142 is attached to the base plate 10 in a manner along the left-right direction of the vehicle. It is provided.

  The main shaft 41 is disposed in a portion of the base plate 10 located between the latch unit 20 and the pinion 142, and its axis is relative to the axis of the support pin 31, which is the swing axis of the open lever 30. So that it is almost perpendicular. The main shaft 41 is provided with a sector gear (input member) 240, a close plate (output member) 340, and a cancel plate (cancel member) 440.

  The sector gear 240 has a fan-shaped flat plate centered on the axis of the main shaft 41, and can rotate about the axis of the main shaft 41 in the directions of arrows 41A and 41B in FIG. The sector gear 240 has a tooth portion 241 on the outer peripheral surface thereof and a guide hole 242 in a fan-shaped portion. The tooth portion 241 constitutes a part of the gear and meshes with the pinion 142 of the closing actuator 140. The guide hole 242 extends in an arc shape around the axis of the main shaft 41 from the slide groove 242a extending in the radial direction around the axis of the main shaft 41, and from the portion adjacent to the main shaft 41 in the slide groove 242a. It has a relief groove portion 242b to be formed, and is formed as a closed notch in the sector portion of the sector gear 240. The initial state of the sector gear 240 is the state (see FIG. 6) that is most rotated in the direction of the arrow 41B around the axis of the main shaft 41 in FIG. Reference numeral 42 in FIG. 2 is a sector sensor for detecting that the sector gear 240 is in the initial state.

  The close plate 340 extends upward from the axial center of the main shaft 41 toward the rear of the vehicle. The close plate 340 includes a contact piece 341 at the extending end of the base that forms a flat plate shape. A pin relief groove 342 is provided at a portion of the sector gear 240 that faces the guide hole 242. The abutting piece 341 is a portion extending in an inclined manner from the end of the base in a manner of gradually separating from the base plate 10. The contact piece 341 is a contact pin of the latch lever 25 when the latch unit 20 is in a half-latched state and rotates from this state around the axis of the main shaft 41 in the direction of the arrow 41A (door closing direction). 28, and the latch unit 20 can be shifted to the fully latched state via the contact pin 28. The pin relief groove 342 extends in the radial direction with the axis of the main shaft 41 as a center. When the sector gear 240 and the close plate 340 are rotated most in the direction of the arrow 41B in FIGS. It is formed at a position facing the slide groove 242a. Between the close plate 340 and the base plate 10, a return spring 343 for maintaining the close plate 340 at the most rotated position in the arrow 41B direction in FIG. 1 is interposed.

  The cancel plate 440 is a flat plate member that extends from an upper part in front of the vehicle to a lower part in the rear of the vehicle around the axis of the main shaft 41 in FIG. And a shaft escape groove 442 and an engagement groove 443. The main shaft 41 passes through the shaft escape groove 442. The connection pin 441 extends along the axis of the main shaft 41 and is provided in such a manner as to penetrate the pin escape groove 342 of the close plate 340 and the guide hole 242 of the sector gear 240. The shaft escape groove 442 extends from the axis of the main shaft 41 toward the axis of the connection pin 441, and the main shaft 41 can be relatively slid along the extending direction. When the main shaft 41 is slid relative to the shaft escape groove 442, the connection pin 441 slides on the pin escape groove 342 of the close plate 340. When the cancel plate 440 is most rotated in the direction of the arrow 41B in FIG. 1, the engagement groove 443 extends from a portion located below the main shaft 41 to a portion located behind the vehicle with the axis of the main shaft 41 as the center. An arc-shaped notch located between them. The width along the radial direction of the engagement groove 443 is a length that substantially matches the extension length of the shaft escape groove 442.

  The cancel plate 440 is provided with an urging spring (urging means) 444 and a meat portion 445. The biasing spring 444 is interposed between the connection pin 441 and the base plate 10, and the connection pin 441 is always located at the most radially outward portion of the slide groove 242 a in the guide hole 242 of the sector gear 240 (the engagement position of the cancel plate 440. ). The waste portion 445 is for adjusting the position of the center of gravity of the cancel plate 440 and is configured by increasing the length in the radial direction from the axis of the main shaft 41. In the present embodiment, when the cancel plate 440 is in the initial state and the connection pin 441 is located at the most radially outward portion of the slide groove portion 242a (see FIG. 6), the portion above the main shaft 41. 1 and 6, the cancel plate 440 has an arrow around the axis of the main shaft 41 in both the case where the inertial force is applied toward the front of the vehicle and the case where the inertial force is applied downward. It is set so that a moment in the direction 41B acts. The thin portion 445 is a flat plate portion integrated with the cancel plate 440 formed in a flat plate shape, and does not increase the size of the cancel plate 440 along the axial direction of the main shaft 41.

  Further, the closer mechanism 40 includes a fail-safe lever 50 at a position below the main shaft 41. The fail safe lever 50 is disposed on the bracket 12 provided on the base plate 10 so as to be swingable in the directions of arrows 51A and 51B in FIG. The lever pin 51 is provided so as to be parallel to the main shaft 41, and supports the fail-safe lever 50 at a portion on the vehicle outer side than the cancel plate 440. The fail safe lever 50 extends downward toward the rear of the vehicle with the axis of the lever pin 51 as the center, and supports one end of the linkage link 60 at the extended end. The linkage link 60 extends along the front-rear direction of the vehicle, and the other end is connected to the tip of the link connecting portion 30b in the open lever 30, as shown in FIGS.

  As shown in FIGS. 1 and 2, an engagement pin 52 is provided at the proximal end portion of the fail safe lever 50. The engagement pin 52 is provided in such a manner as to penetrate the engagement groove 443 from a portion of the cancel plate 440 facing the engagement groove 443, and the fail safe lever 50 is in the direction of the arrow 51B around the axis of the lever pin 51 in FIG. When rotating in the (fail safe operation direction), the engagement groove 443 provided in the cancel plate 440 is configured to engage with the inner wall surface far from the main shaft 41.

  In the door latch device 1 configured as described above, when the slide door D is in the opened state, the latch unit 20 is in the unlatched state as shown in FIG. In the closer mechanism 40, the sector gear 240, the close plate 340, and the cancel plate 440 are held in the most rotated state in the direction of arrow 41B in FIG. Due to the urging force, the connection pin 441 is maintained at the engagement position in the outermost radial direction of the slide groove 242 a in the guide hole 242 of the sector gear 240. Accordingly, when the sector gear 240 rotates, the connection pin 441 contacts and engages the inner wall surface of the slide groove 242a in the guide hole 242, and thus the close plate 340 and the cancel plate 440 rotate in the same direction ( Power transmission state: connected state). Further, the fail safe lever 50 is in a state of being most rotated in the direction of the arrow 51A in FIG.

  When the sliding door D is operated to close the vehicle body B from the state shown in FIG. 6, in the latch unit 20, the striker S of the vehicle body B relatively enters the engagement groove portion 22 c of the latch 22 and hits the latch 22. By contact, the latch 22 rotates along the direction of the arrow 26A (full latch direction) against the urging force of a latch spring (not shown), and the ratchet 23 eventually becomes a half latch of the latch 22 as shown in FIG. Engage with the claw portion 22a to enter a half latch state. When the latch unit 20 is in a half-latch state, the slide door D is in a half-closed state with respect to the vehicle body B. In addition, because of the half latch state, the latch lever 25 that swings integrally with the latch 22 also rotates in the direction of the arrow 26 </ b> A, and the contact pin 28 of the latch lever 25 moves to the contact piece 341 of the close plate 340. It will be arranged on the movement trajectory.

  The above-described half latch state of the latch unit 20 is detected by the latch sensor 29. When the half latch state is detected by the latch sensor 29, the electric motor 141 of the closing actuator 140 is driven to rotate the pinion 142, whereby the sector gear 240 meshing with the pinion 142 is rotated in the direction of arrow 41A in FIG. To do. The rotation of the sector gear 240 is detected by the sector sensor 42.

  When the sector gear 240 rotates in the connected state, as shown in FIG. 8, the close plate 340 and the cancel plate 440 rotate in the same arrow 41A direction, and the contact piece 341 of the close plate 340 eventually touches the latch lever 25. As a result, the latch 22 rotates in the direction of the arrow 26A and the latch unit 20 shifts to the full latch state. As a result, the semi-closed slide door D moves in the door closing direction via the striker S, and the vehicle main body B is fully closed. When the latch unit 20 is in a fully latched state, this is detected by the latch sensor 29, and the closing actuator 140 rotates in the reverse direction, so that the sector gear 240, the closing plate 340, and the canceling plate 440 are each in the direction of arrow 41B in FIG. Rotate to. Thereafter, when the sector gear 240 reaches the initial state, this is detected by the sector sensor 42 and the closing actuator 140 stops.

  Even when the cancel plate 440 rotates during the above-described operation, the inner wall surface of the engagement groove 443 and the engagement pin 52 of the fail safe lever 50 do not contact each other, and the fail safe lever 50 swings. Never do.

  If the inside handle IH or the outside handle OH is opened when the latch unit 20 is in the half latch state or the full latch state, the opening operation is transmitted to the wire cable W via the control unit CU, The open lever 30 swings around the axis of the support pin 31 in the door opening direction, and the state shown in FIG. 3 is changed to the state shown in FIG. When the open lever 30 swings in the door opening direction, the pressing piece 30c engages with the ratchet lever 24 of the latch unit 20, and the contact engagement state of the ratchet 23 with the latch 22 is released. The latch 22 is brought into an unlatched state by an elastic force (not shown). As a result, the meshing state between the slide door D and the striker S is released, and the slide door D can be opened and moved.

  On the other hand, when the open lever 30 swings in the door opening direction by opening the inside handle IH or the outside handle OH, the fail safe lever 50 rotates in the direction of the arrow 51B (fail safe operation direction) via the linkage link 60. Then, the engaging pin 52 of the fail safe lever 50 is engaged with the inner wall surface of the engaging groove 443 far from the main shaft 41, and then the cancel plate 440 is moved against the elastic force of the biasing spring 444. As the slide plate 440 is slid along the escape groove 442, the cancel plate 440 becomes the non-engagement position (cancel position) as shown in FIG. As a result, the connection pin 441 of the cancel plate 440 moves to the main shaft 41 side in the slide groove 242a in the guide hole 242 of the sector gear 240 and faces the escape groove 242b of the guide hole 242. The rotation in the direction of the arrow 41A (the closing direction) is not transmitted to the closing plate 340 and the canceling plate 440 (non-transmitting state: unconnected state). Therefore, even when the sector gear 240 is rotated in the direction of the arrow 41A in the figure by driving the closing actuator 140, the opening lever 30 swings in the opening direction by the opening operation of the inside handle IH or the outside handle OH. Then, thereafter, the rotation of the sector gear 240 is not transmitted to the close plate 340 and the cancel plate 440, and the transition of the latch unit 20 from the half latch state to the full latch state is immediately stopped. As described above, the latch unit 20 enters the unlatched state when the inside handle IH or the outside handle OH is opened. Accordingly, even when a foreign object such as clothing is sandwiched between the vehicle main body B and the slide door D while the latch unit 20 transitions from the half latch state to the full latch state, the latch unit 20 is disposed on the slide door D. This can be released by opening the inside handle IH or the outside handle OH.

  As described above, according to the door latch device 1, the open lever 30 and the fail safe lever 50 of the closer mechanism 40 are linked by the linkage link 60, so that the inside handle IH or the outside handle only on the open lever 30. If the wire cable W for transmitting the opening operation of the handle OH is connected, the closer mechanism 40 can be shifted to a non-power transmission state (non-connected state). As a result, a wire cable for individually transmitting the opening operation to the closer mechanism 40 becomes unnecessary, and it becomes possible to reduce the number of parts and the manufacturing cost.

  By the way, conventionally, in the door latch device in which the open lever and the fail safe lever of the closer mechanism are linked by the linkage link as described above, the operation of the closer mechanism can affect the operation of the open lever. When inertial force is applied to the vehicle by, for example, sudden start, sudden stop, sharp curve traveling, or rough road traveling, members such as the fail safe lever of the closer mechanism perform undesired displacement by this inertial force, This displacement may affect the state of engagement between the latch and the ratchet via the open lever.

  However, according to the door latch device 1 in this embodiment, first, since the main shaft 41 and the lever pin 51 extend along the left-right direction of the vehicle, when the inertial force in the left-right direction acts on the vehicle. However, the levers of the closer mechanism 40 are not subject to inertia displacement, and there is no possibility that the operation of the closer mechanism 40 will affect the engagement state between the latch 22 and the ratchet 23 or the like.

  On the other hand, when an inertial force is applied toward the rear of the vehicle, or when an inertial force is applied toward the upper side of the vehicle, the arrows in FIGS. 1 and 6 center on the axis of the lever pin 51 in the fail safe lever 50 itself. Since a moment in the direction 51A acts (the center of gravity of the fail safe lever 50 is below the horizontal line passing through the axis of the lever pin 51 and behind the vertical line when the fail safe lever 50 is in an inoperative state), the open lever 30 Does not swing in the opening direction. In addition, a moment in the direction of arrow 41A in FIGS. 1 and 6 acts on the cancel plate 440 centered on the axis of the main shaft 41 (the center of gravity position of the cancel plate 440 is the non-operating state of the main shaft 41). Since the engaging groove 443 is swung with respect to the engaging pin 52 of the fail safe lever 50 above the horizontal line passing through the axis and in front of the vertical line, the fail safe lever 50 does not swing. As a result, the operation of the closer mechanism 40 does not affect the engagement state between the latch 22 and the ratchet 23 even by the inertial force directed toward the rear or upward of the vehicle.

  Further, when an inertial force is applied toward the front of the vehicle, or when an inertial force is applied toward the lower side of the vehicle, the fail-safe lever 50 itself is in the direction of the arrow 51B in FIG. Moment acts on. This moment acts on the open lever 30 through the linkage link 60 as a moment in the door opening direction. However, when an inertial force acts on the front side or the lower side of the vehicle, a moment acts on the cancel plate 440 in the direction of the arrow 41B in FIGS. This moment, combined with the elastic force of the biasing spring 444, prevents the cancel plate 440 from sliding along the shaft escape groove 442 in the lower right direction in FIGS. 1 and 6, that is, to the disengaged position. Acts like As a result, the swing of the fail safe lever 50 in contact with the inner wall surface of the engagement groove 443 far from the main shaft 41 through the engagement pin 52 in the direction of the arrow 51B is prevented, and the open lever 30 Oscillation in the opening direction is also prevented. As a result, the operation of the closer mechanism 40 does not affect the engagement state between the latch 22 and the ratchet 23 even by the inertial force directed forward or downward of the vehicle.

  As described above, the closer mechanism 40 of the door latch device 1 causes the inertial force when the inertial force that swings the open lever 30 in the door opening direction is applied in a state where the cancel plate 440 is disposed at the engagement position. Since the center of gravity of the cancel plate 440 is set so that a moment about the rotation axis that maintains the engagement position is applied to the cancel plate 440, the closer mechanism 40 is opened even when an inertial force is applied to the vehicle, for example. The lever 30 does not swing in the door opening direction and does not affect the latch unit 20.

  In addition, since the cancel plate 440 is provided with the sunk portion 445 by increasing the radial length from the axial center of the main shaft 41, the center of gravity of the cancel plate 440 is adjusted by the sunk portion 445. In addition, it is possible to make the projecting dimension from the base plate 10 as small as possible as compared with the case where a weight such as a counterweight is separately provided to adjust the position of the center of gravity. That is, in the present embodiment, it is possible to reduce the installation space along the left-right direction of the vehicle. Accordingly, it is possible to reduce the size of the slide door D to be attached to the door latch device 1 along the left-right direction of the vehicle. In particular, in the slide door D to which the present embodiment is applied, the door latch device 1 and the window glass WG (see FIG. 11) are generally arranged so as to overlap in the left-right direction of the vehicle. For this reason, if the size of the door latch device 1 is reduced, the above-described effects appear more remarkably, such as no restriction on the position of the window glass WG.

  In the above-described embodiment, the sliding door D that is slidably disposed along the front-rear direction on the side of the vehicle main body B is applied. However, the closer that shifts the latch unit in the half-latch state to the full-latch state. As long as it is a door provided with a mechanism, it can be applied to other things. In this case, the opening / closing direction of the door body does not need to be a slide, and the door body can be applied to an opening / closing direction by a hinge.

  In the above-described embodiment, the axis of the lever pin 51 serving as the pivot axis of the fail safe lever 50 and the axis of the support pin 31 serving as the pivot axis of the open lever 30 are perpendicular to each other. Although the intersection angle is set, the present invention is not limited to this. Specifically, even when an inertial force that swings the open lever 30 is applied, if the inertial force is set so that a moment that swings the fail-safe lever 50 does not act, it does not necessarily need to be a right angle.

  Further, in the above-described embodiment, the cancel plate 440 is provided with the sunk portion 445 by increasing the length in the radial direction from the axis of the main shaft 41, and the sunk portion 445 determines the position of the center of gravity of the cancel plate 440. However, the present invention is not necessarily limited to this, and it is possible to attach a weight such as a counterweight if the installation space permits, similarly to the conventional one.

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 10 Base plate 20 Latch unit 23 Ratchet 24 Ratchet lever 30 Open lever 40 Closer mechanism 41 Main shaft 50 Fail safe lever 51 Lever pin 52 Engagement pin 60 Linkage link 140 Actuator for closing 240 Sector gear 340 Close plate 440 Cancel plate 444 Energizing Spring 445

Claims (11)

The closing actuator (140), the latch unit (20) that can be displaced from the half-latch state to the full-latch state by the power of the closing actuator (140), and the power of the closing actuator (140) ) And a power transmission mechanism for power closing that switches between a connection state that can be transmitted and a non-transmission state that is not transmitted, and the power transmission mechanism for power closing is moved from the connection state to the non-connection state by opening a door handle (OH). In what switches to a consolidated state,
The power closing power transmission mechanism includes a sector gear (240) that rotates by the operation of the closing actuator (140), a close plate (340) that can swing together with the sector gear (240), an engagement position, and a cancel. When the position is in the engaged position, the sector gear (240) and the close plate (340) are swung together in the connected state, and when in the cancel position, the rotation of the sector gear (240) is closed. A cancel plate (440) that is not connected to the plate (340) and is in a non-connected state; and biasing means (444) that biases the cancel plate (440) from the cancel position toward the engagement position. ,
The position of the center of gravity of the cancel plate (440) is defined by a horizontal line and a vertical line passing through the center of rotation of the cancel plate (440) when the closing actuator (140) is inoperative and is in the engagement position. A power closer device for a vehicle door body set in a quadrant including a direction urged by the urging means (444) among four quadrants. The closing actuator (140), the latch unit (20) that can be displaced from the half-latch state to the full-latch state by the power of the closing actuator (140), and the power of the closing actuator (140) ) And a power transmission mechanism for power closing that switches between a connection state that can be transmitted and a non-transmission state that is not transmitted, and the power transmission mechanism for power closing is moved from the connection state to the non-connection state by opening a door handle (OH). In what switches to a consolidated state,
The power closing power transmission mechanism includes a sector gear (240) that rotates by the operation of the closing actuator (140), a close plate (340) that can swing together with the sector gear (240), an engagement position, and a cancel. When the position is in the engaged position, the sector gear (240) and the close plate (340) are swung together in the connected state, and when in the cancel position, the rotation of the sector gear (240) is closed. A cancel plate (440) that is not connected to the plate (340) and is in a non-connected state; and biasing means (444) that biases the cancel plate (440) from the cancel position toward the engagement position. ,
The center of gravity of the cancel plate (440) is combined with the biasing means (444) for biasing the cancel plate (440) from the cancel position toward the engagement position. A power closer device for a vehicle door set to be maintained from the cancel position toward the engagement position.   In Claim 1 or Claim 2, the power transmission mechanism for power closing is provided with a fail-safe lever (50) that rotates in a fail-safe manner in response to the opening of the door handle (OH), and the fail-safe lever (50 ) Fail-safe rotation, the cancel plate (440) is pressed from the engagement position toward the cancel position against the urging force of the urging means (444). apparatus.   4. The apparatus according to claim 3, further comprising an open lever (30) capable of bringing the latch unit (20) into an unlatched state when the door handle (OH) is rotated by an opening operation of the door handle (OH). A power closer device for a vehicle door connected to the door handle (OH) via (30).   5. When the inertia in the fail-safe rotation direction acts on the fail-safe lever (50) due to an impact applied to the vehicle according to claim 3, the cancel plate (440) is moved from the cancel position to the engagement position. A power closer device for a vehicle door configured so that inertia directed toward the vehicle acts.   The vehicle door body according to claim 1 or 2, wherein the cancel plate (440), the sector gear (240), and the close plate (340) are configured to rotate about the same main shaft (41). Power closer device. According to claim 6, wherein the cancel plate (440) is the biasing means and the main shaft (41) from the meat portion uselessly in the radial direction in the quadrant to another quadrant that includes the direction which is biased by a (444) (445 ) power closer device of the car Ryotobiratai adjusted for center of gravity of the cancel plate by providing (440). The engagement groove according to any one of claims 3 to 5, wherein the cancel plate (440) has an engagement groove that engages with the fail-safe lever (50) when the fail-safe lever (50) moves in a fail-safe rotation direction. (443) is provided, the power closers of the engagement groove (443) is a car Ryotobiratai that said cancel plate (440) is not rotated the fail-safe lever be rotated (50) to the fail-safe rotation direction shape apparatus.   In Claim 4, the open lever (30) is integrally provided with a weight support portion (30a), a link connection portion (30b), and a pressing piece portion (30c), and the weight support portion (30a) is provided with the weight support portion (30a). Is provided with a weight (32), a link member (60) linked to the fail-safe lever (50) at the link connecting portion (30b), and a wire cable (W) linked to the door handle (OH). And the pressing piece (30c) is a power closer device for a vehicle door body that is engaged with a ratchet lever (24) of the latch unit (20) so as to be engageable with each other. 3. The connection according to claim 1 or 2, wherein the cancel plate (440) is inserted into both the guide hole (242) of the sector gear (240) and the pin relief groove (342) of the close plate (340). A pin (441) is provided, and the connection pin (441) is moved relative to the guide hole (242) and the pin relief groove (342), so that the power closing power transmission mechanism is brought into the connected state. A power closer device for a vehicle door that switches to the unconnected state.   In Claim 4, when the fail-safe lever (50) rotates in a fail-safe manner in response to the opening of the open lever (30), the connection pin (441) is connected to the guide hole (242) in the cancel plate (440). ) And the pin relief groove (342), the power closer device of the vehicle door body that is displaced in the direction of the cancel position by moving relative to the pin escape groove (342).

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