JP5107170B2 - Door latch device - Google Patents

Description

  The present invention relates to a door latch device used for a door of a vehicle such as an automobile, and more particularly to a door latch device using a motor as a drive source.

  In order to operate a door of a vehicle such as an automobile, an electric door latch device using a motor as a drive source, a so-called power latch has been developed. This type of door latch device includes a motor for driving a latch member fitted to the striker. The motor moves the latch member from the half latch position to the full latch position. In this type of door latch device, some measures are taken so that the door can be moved in the opening direction when a foreign object is caught between the door and the vehicle body while the door is fully closed. Yes.

  For example, when a foreign object is caught between the door and the vehicle body, the door can be moved in the opening direction by operating the switch by opening the door handle and rotating the motor in the reverse direction. However, in that case, a power source for moving the motor is required. In general, an in-vehicle battery is used as the power source. For this reason, if the electric capacity of the in-vehicle battery is insufficient, even if an attempt is made to cancel the closing operation of the door, there is a possibility that the door will stop without the motor moving normally. Further, when the door is stacked due to a voltage drop or the like while the door is pulled to the full latch position by the motor, the door cannot be opened.

In the door latch device disclosed in Patent Document 1 below, when an operation handle provided on the slide door is opened, the open lever swings through the first cable by the control unit, and further through the second cable. The cancel lever is configured to move in the release direction when the fail safe lever swings. According to this configuration, when a foreign object is caught between the door and the vehicle body on the way from the half latch position to the full latch position, the engagement between the latch and the striker is released by opening the door handle, Thereafter, by driving the door opening actuator, the slide door can be automatically moved in the opening direction.
JP 2006-342512 A

  In addition to the open cable and open lever normally used when opening a fully latched door, the conventional door latch device has a cancel-only lever and cancel-only cable that are used when releasing foreign objects. The number of parts is large and the structure is complicated. When releasing the foreign object, the latch member and striker are disengaged and the door is moved in the opening direction by the door opening actuator. There is a risk of disappearing.

  Accordingly, an object of the present invention is to provide a door latch device capable of moving the door in the opening direction surely manually as required while the door is being pulled into the full latch position.

  The door latch device according to the present invention includes a striker, a latch member that can be fitted to the striker and can move from an open position to a full latch position through a half latch position, a rotating member that rotates about a shaft portion, and the rotating member A motor that rotates the latch member, a stopper member that prevents the latch member from rotating toward the open position in a state in which the latch member has moved to the full latch position, and a first direction around the shaft portion. The latch member is rotated from the half latch position to the full latch position by contacting the latch member while being rotated in the first direction, and rotated in the second direction. A latch drive lever that is separated from the latch member in a state, and the rotary member, the latch drive lever A transmission member that can rotate between an engagement position that contacts the hook portion and a release position that is disengaged from the receiving portion; a first position that allows the transmission member to move toward the engagement position; and the transmission member A release lever that is movable over a second position that moves the release lever toward the release position, and an operation member that moves the release lever toward the second position when the door handle is opened. is doing.

An example of the release lever has a pressing portion formed along an arc centered on the shaft portion, and the pressing portion is provided to face a cancel pin provided on the transmission member. An example of the operation member is a wire rope or rod that moves the release lever to the second position in conjunction with the opening operation of the door handle.
The door latch device according to the present invention may be applied to a hinged door or a sliding door.

  According to the present invention, when the door needs to be opened while the door is pulled from the half latch position to the full latch position by the driving force of the motor, the door handle is opened and the release lever is moved to the second position. Thus, the door closing operation by the motor can be canceled immediately, and the door can be reliably moved manually in the opening direction. The release lever and the operation member that moves the release lever to the second position are members that are normally used to operate the stopper member when the fully latched door is opened. For this reason, it is possible to suppress an increase in the number of parts dedicated to cancellation, and the structure can be simplified.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
An automobile 1 shown in FIG. 1 includes a hinged door 3 provided on the front side of a vehicle body 2, a sliding door 4 provided on a rear side, and a back door (tail gate provided on the rear surface of the vehicle body 2. ) 5.

  The hinge type door 3 is attached to the vehicle body 2 by a hinge 6 provided on the vehicle body 2 and can be opened and closed around the hinge 6. The sliding door 4 moves in the front-rear direction of the vehicle body 2 along a guide rail 7 provided on the vehicle body 2. These doors 3 and 4 are respectively provided with door handles 8 and 9 for opening and closing operations. The back door 5 opens and closes in the vertical direction around a hinge (not shown) provided at the top of the vehicle body 2.

  The doors 3 and 4 are provided with an electric door latch device 10 described below. A door latch device 10 may be provided on either the hinged door 3 or the sliding door 4. A door latch device 10 may be provided on the back door 5. Since these door latch devices 10 basically have a common structure, the door latch device 10 for the front door 3 will be described below as a representative.

  The door latch device 10 shown in FIGS. 2 to 8 includes a striker 11 provided on the vehicle body 2 and a power latch mechanism 12 provided on the door 3. The striker 11 has a substantially circular cross section and is fixed to a pillar portion 13 (shown in FIG. 1) of the vehicle body 2.

  The power latch mechanism 12 includes a base member 20 incorporated in the door 3, a latch member 21, a stopper member 22, a motor 30, an output gear 31 that is rotated by the motor 30, and a rotation that rotates about a shaft portion 32. A member 33, a transmission member 34 provided on the rotating member 33, a latch drive lever 35, a release lever 36, and the like are included. The power source of the motor 30 is an in-vehicle battery (not shown).

  The base member 20 is fixed to the frame of the door 3. The base member 20 has a groove 40 into which the striker 11 can enter. The latch member 21 and the stopper member 22 are attached to the base member 20. The latch member 21 rotates around the shaft 41 provided on the base member 20 from the open position shown in FIG. 2 to the full latch position shown in FIGS. 5 and 6 through the half latch position shown in FIGS. can do.

  The latch member 21 is provided with a fork portion 42 and a force transmission portion 43. The fork portion 42 can be fitted to the striker 11. The latch member 21 is urged toward the open position shown in FIG. 2 by a latch urging spring 44. When the latch member 21 is in the open position, the striker 11 is pushed out of the groove 40.

  The stopper member 22 can rotate around the shaft 50. A stopper wall 51 and an engaging portion 52 are provided on the stopper member 22. The stopper wall 51 holds the latch member 21 at the full latch position by contacting the fork portion 42 of the latch member 21 in a state where the latch member 21 is rotated to the full latch position (shown in FIGS. 5 and 6). It has become. The stopper member 22 is urged clockwise in FIG. 2 by a stopper urging spring 53.

  A driven gear portion 55 is provided on the outer peripheral portion of the rotating member 33. The driven gear portion 55 is formed along an arc centered on the shaft portion 32. The output gear 31 meshes with the driven gear portion 55. When the motor 30 rotates, the rotating member 33 rotates around the shaft portion 32 via the output gear 31 and the driven gear portion 55. That is, the rotating member 33 can rotate in a first direction indicated by an arrow A1 in FIG. 3 and the like and in a second direction indicated by an arrow A2 in FIG.

  A transmission member 34 is attached to the rotation member 33. The transmission member 34 can rotate around the shaft 60 in the direction of the engagement position indicated by the arrow B1 in FIG. 2 and the direction of the release position indicated by the arrow B2. The transmission member 34 is urged by the spring 61 in the direction of the arrow B1. A locking portion 62 is formed on the distal end surface of the transmission member 34 along an arc centered on the shaft 60. The transmission member 34 is provided with a cancel pin 63 that functions as an interlocking portion. The cancel pin 63 protrudes from the surface of the transmission member 34 in the axial direction of the shaft portion 32.

  The latch drive lever 35 can rotate relative to the rotation member 33 around the shaft portion 32. The latch drive lever 35 is formed with a receiving portion 70 that can come into contact with the locking portion 62 of the transmission member 34. The receiving part 70 extends in the radial direction of the shaft part 32. As shown in FIG. 2, when the transmission member 34 moves in the direction of arrow B <b> 1 (the direction of the engagement position), the locking portion 62 can abut on the receiving portion 70. As shown in FIG. 7, when the transmission member 34 moves in the direction of the arrow B <b> 2 (the direction of the release position), the locking portion 62 is detached from the receiving portion 70.

  A latch driving unit 71 is provided in the latch driving lever 35. The latch drive portion 71 is formed at a position where the latch drive lever 35 can come into contact with the force transmission portion 43 of the latch member 21 when the latch drive lever 35 rotates about the shaft portion 32 in the first direction A1. The latch drive lever 35 is urged in the second direction A2 by a lever urging spring 72.

  The release lever 36 can rotate around the shaft 80 over a first position shown in FIGS. 2 to 6 and a second position shown in FIGS. 7 to 8. That is, the release lever 36 can rotate in a first direction indicated by an arrow C1 in FIG. 2 and a second direction indicated by an arrow C2. The release lever 36 is urged by the return spring 81 in the first direction C1.

  When the release lever 36 is rotated in the first direction C1 by the elasticity of the return spring 81 and the release lever 36 is held at the first position, the transmission member 34 moves in the direction of arrow B1 (the direction of the engagement position). It is acceptable.

  When the release lever 36 rotates in the second direction C2, the release lever 36 is switched to the second position, so that the following pressing portion 83 presses the cancel pin 63, so that the transmission member 34 faces the release position and the arrow B2 Rotate in the direction (the direction of the release position).

  An operation member 82 (only a part is shown) is connected to the release lever 36. The operation member 82 has a function of moving the release lever 36 in the second direction C2 when the door handle 8 (shown in FIG. 1) is operated in the opening direction. That is, the operation member 82 is a force transmission member such as a wire rope or a rod for moving the release lever 36 in the second direction C2 in conjunction with the opening operation of the door handle 8.

  A pressing portion 83 is provided at one end of the release lever 36. The pressing portion 83 is formed along an arc centered on the shaft portion 32. The distance from the shaft portion 32 to the pressing portion 83 is smaller than the distance from the shaft portion 32 to the cancel pin 63. The pressing portion 83 faces the cancel pin 63. When the release lever 36 moves in the second direction C2, the pressing portion 83 presses the cancel pin 63, so that the transmission member 34 is in the direction indicated by the arrow B2 (release position). (In the direction of). An arm portion 84 is provided at the other end of the release lever 36. The arm portion 84 is in contact with the engaging portion 52 of the stopper member 22.

Next, the operation of the door latch device 10 having the above configuration will be described.
FIG. 2 shows a state immediately before the door 3 is closed. The striker 11 is about to enter the groove 40 toward the latch member 21. At this time, the latch member 21 is held in the open position by the elasticity of the latch biasing spring 44. The rotating member 33 is stopped at a position rotated clockwise by the motor 30. The release lever 36 is held at a position rotated in the first direction C <b> 1 by the elasticity of the return spring 81.

  For this reason, the pressing portion 83 of the release lever 36 is separated from the cancel pin 63. Therefore, the transmission member 34 is rotated in the direction B1 of the engagement position by the elasticity of the spring 61, and the locking portion 62 of the transmission member 34 is in contact with the receiving portion 70 of the latch drive lever 35. For this reason, the latch drive lever 35 is in a state where it can rotate around the shaft portion 32 integrally with the rotating member 33.

  When the door 3 is operated in the fully closed direction from the state shown in FIG. 2, the striker 11 enters the groove 40 as shown in FIG. 3, and the striker 11 fits into the fork portion 42 of the latch member 21. The half latch state is entered. Here, when a switch (not shown) is operated, the motor 30 rotates in the first direction D1, so that the rotating member 33 rotates in the first direction A1 about the shaft portion 32. When the rotation member 33 rotates in the first direction A1, the transmission member 34 moves in the first direction A1 together with the rotation member 33, so that the latch drive lever 35 rotates in the first direction A1.

  When the motor 30 further rotates in the first direction D1 and the rotation member 33 and the latch drive lever 35 further rotate in the first direction A1, the latch drive unit 71 of the latch drive lever 35 latches as shown in FIG. Abutting on the force transmission portion 43 of the member 21, the latch member 21 is pushed in the direction indicated by the arrow E1 toward the full latch position. For this reason, the striker 11 fitted to the fork portion 42 of the latch member 21 moves toward the full latch position.

  FIG. 5 shows a state in which the latch member 21 has moved to the full latch position. When the latch member 21 moves to the full latch position, the stopper wall 51 of the stopper member 22 abuts on the fork portion 42 of the latch member 21, and the latch member 21 is locked at the full latch position. For this reason, the striker 11 is held in the groove 40 in a state in which the striker 11 is fitted to the fork portion 42, and is locked.

  After that, as shown in FIG. 6, when the motor 30 rotates in the second direction D2, the rotating member 33 rotates in the second direction A2. At this time, the latch driving lever 35 is rotated in the second direction A2 by the lever biasing spring 72 and returns to the initial position, so that the latch driving portion 71 is separated from the force transmitting portion 43 of the latch member 21. Since the latch member 21 is locked at the full latch position by the stopper member 22, the striker 11 is held in the groove 40 while being fitted to the fork portion 42, and the locked state is maintained.

  In the state of FIG. 6, when the door handle 8 is opened to open the door 3, the release lever 36 is rotated in the second direction C <b> 2 by the operation member 82, so that the arm portion 84 of the release lever 36 causes the stopper member to move. 22 is pushed in the unlocking direction. For this reason, the stopper wall 51 of the stopper member 22 is detached from the fork portion 42 of the latch member 21. Therefore, the latch member 21 rotates toward the open position, and the striker 11 fitted to the fork portion 42 is pushed out of the groove 40, whereby the door 3 can be opened by hand.

  Immediately before the door 3 is fully closed, that is, in the middle of the latch member 21 from the half latch position shown in FIG. 4 to the full latch position shown in FIG. When it becomes necessary to move the door 3 in the opening direction, the door handle 8 is operated in the opening direction. When the door handle 8 is opened, the operating member 82 is pulled in the direction indicated by the arrow F1 in FIG. 7, whereby the release lever 36 rotates in the second direction C2.

  Then, the pressing portion 83 of the release lever 36 contacts the cancel pin 63 of the transmission member 34, and the transmission member 34 moves in the direction of arrow B2 toward the release position. Since the pressing portion 83 is formed along an arc centered on the shaft portion 32, the cancel pin 63 is moved along the arc-shaped pressing portion 83 when the rotating member 33 rotates in the first direction A <b> 1. Move around the part 32. For this reason, when the release lever 36 moves in the second direction C <b> 2, the cancel pin 63 that moves in a circular arc around the shaft portion 32 can smoothly contact the pressing portion 83 of the release lever 36. Therefore, the pressing portion 83 of the release lever 36 can smoothly press the transmission member 34 in the direction of arrow B2 (the direction of the release position).

  Thus, when the pressing portion 83 presses the cancel pin 63, the locking portion 62 of the transmission member 34 is disengaged from the receiving portion 70 of the latch drive lever 35. At the same time, the arm portion 84 of the release lever 36 rotates the stopper member 22 in the direction indicated by the arrow S1 in FIG. 7, so that the latch member 21 can rotate from the half latch position to the open position.

  When the engaging portion 62 of the transmission member 34 is disengaged from the receiving portion 70 of the latch drive lever 35, the latch drive lever 35 rotates in the second direction A2 by the elasticity of the lever biasing spring 72 as shown in FIG. The latch drive unit 71 is separated from the force transmission unit 43 of the latch member 21. Further, when the latch member 21 rotates in the direction indicated by the arrow G1 in FIG. 8, the striker 11 moves in the direction indicated by the arrow H1 and is pushed out of the groove 40. For this reason, the door 3 moves toward the opening position, and the door 3 can be moved in the opening direction by hand.

  According to the door latch device 10 of the present embodiment, when a foreign object is caught between the vehicle body 2 and the door 3, the door 3 is in the middle of being fully closed (full latch position) regardless of the rotation of the motor 30. The door 3 can be manually moved in the opening direction. In other words, since the retracting operation of the door 3 by the motor 30 can be canceled without using electric power, for example, even when the voltage of the in-vehicle battery is lowered, the door latch device 10 does not open. There is nothing. Also, when the motor 30 is stopped for some reason just before the door 3 is fully closed and the door 3 is stuck, the door 3 is manually opened by opening the door handle 8. Can be moved in any direction.

  In the door latch device 10 of the present embodiment, the release lever 36 and the operation member 82 that moves the release lever 36 to the second position are normally used to unlock the stopper member 22 when the fully latched door is opened. It is a member. For this reason, it can suppress that the number of parts only for cancellation is suppressed, and there are few parts compared with the door latch apparatus disclosed by the said patent document 1, and a structure is simple.

The perspective view of the motor vehicle provided with the door latch apparatus. The top view which shows typically the state which has the latch member of the door latch apparatus which concerns on one Embodiment of this invention in an open position. The top view which shows the state which the latch member of the door latch apparatus shown by FIG. 2 moved to the half latch position. The top view which shows the state in the middle of the latch member of the door latch apparatus shown by FIG. 2 moving from a half latch position to a full latch position. The top view which shows the state which the latch member of the door latch apparatus shown by FIG. 2 moved to the full latch position. FIG. 3 is a plan view showing a state in which the latch member of the door latch device shown in FIG. 2 is in a full latch position and the latch drive lever is separated from the latch member. FIG. 3 is a plan view showing a state where a release lever of the door latch device shown in FIG. 2 is operated. The top view of the state which the release lever of the door latch apparatus shown by FIG. 2 was operated, and the latch member moved to the open position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Door latch apparatus 11 ... Striker 21 ... Latch member 22 ... Stopper member 30 ... Motor 32 ... Shaft part 33 ... Rotating member 34 ... Transmission member 35 ... Latch drive lever 36 ... Release lever 63 ... Cancel pin 82 ... Operation member 83 ... Press Part

Claims (3)

With striker,
A latch member that can be fitted to the striker and is movable from the open position to the full latch position through the half latch position;
A rotating member that rotates about a shaft portion;
A motor for rotating the rotating member;
A stopper member that prevents the latch member from rotating toward the open position in a state in which the latch member has moved to the full latch position;
The latch member can be rotated in the first direction and the second direction around the shaft portion, and the latch member can be moved from the half latch position to the full latch position by contacting the latch member in the state rotated in the first direction. A latch drive lever that is driven and separates from the latch member in a state rotated in the second direction;
A transmission member provided on the rotating member and rotatable between an engagement position contacting the receiving portion of the latch drive lever and a release position coming off the receiving portion;
A release lever movable between a first position that allows the transmission member to move toward the engagement position and a second position that moves the transmission member toward the release position;
An operation member that moves the release lever toward the second position in a state in which the door handle is opened;
A door latch device comprising:   The said release lever has a press part which follows the circular arc centering on the said shaft part, and this press part is facing the cancellation pin provided in the said transmission member. Door latch device.   The door latch device according to claim 1 or 2, wherein the operation member is a wire rope or a rod that moves the release lever to the second position in conjunction with an opening operation of the door handle.

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