JP4523857B2 - Back door locking device - Google Patents

Description

  The present invention relates to a back door locking device that prevents the back door from being unexpectedly unlocked when an impact force is applied to the back door locked to the vehicle body from the rear of the vehicle.

  When the opening formed in the back of the vehicle body is closed with a back door that can be opened and closed, a lock mechanism is provided on the back door, and a striker is provided near the opening of the vehicle body so that the back door is in the closed position. A lock device that holds a back door in a closed position by gripping a striker with a lock mechanism is conventionally known.

As a prior art of this type of locking device, for example, there is Patent Document 1. The lock device of Patent Document 1 includes an open lever and a lock release lever.
The open lever can be moved between a linkable position that can be linked to the lock mechanism and a link impossible position that cannot be linked by operating the in-vehicle switch (cancel switch). It can be rotated between a lock position for holding the lock and a lock release position for releasing the lock mechanism. Further, the open lever is always urged to rotate toward the lock position by the urging means. The unlock lever moves to the unlock position in conjunction with the unlocking operation of the outside handle provided on the back door when the open lever is in the linkable position, and opens when the outside handle is not operated. Allow the lever to move to the locked position.

If the locking mechanism locks the back door in the closed position, the locking mechanism normally remains locked even when the outside handle is operated from outside the vehicle, so the back door does not open.
JP 2001-164812 A

  However, for example, when another vehicle collides with the back door from behind and the back door is deformed, and this impact force is transmitted to the open lever, the open lever moves to the unlocked position, and the back door opens unexpectedly. May end up.

  An object of the present invention is to provide a back door locking device in which an unexpected impact force is applied to the back door and the back door does not open unexpectedly even when the impact force is applied to the open lever.

  The back door locking device of the present invention is provided in a striker fixed to the periphery of the opening at the rear of the vehicle body, and a back door that opens and closes the opening, and engages with the striker to keep the back door closed. In a lock device having a lock mechanism capable of transitioning between a locked state to be held and an unlocked state in which engagement with the striker is released, movement to a linkable position that can be linked to the lock mechanism and a linkable position that cannot be linked When the lock mechanism is in the linkable position, the lock mechanism can be rotated between a lock position for holding the lock mechanism in a locked state and a lock release position for unlocking the lock mechanism. The open lever can be linked with the open lever that is urged to rotate toward the position and the driving force of the electric mechanism that is driven by operating the cancel switch. When the open lever is in the linkage position, the switching member that moves to the linkage position to be moved to the linkage position and the cancel position to be moved to the linkage impossible position, and the unlocking operation of the outside handle provided on the back door are linked. The open lever is moved to the unlock position, and when the outside handle is not operated, the unlock lever that allows the open lever to move to the lock position and a load greater than a predetermined value are received by the rear collision of the back door. And a forcible moving member that is deformed so as to press the switching member toward the cancel position.

  It is preferable that one end of the forcible moving member is fixed to the fixing member, and the other end includes an engaging portion that engages with an engaging protrusion that is integrated with the switching member.

  The forced moving member is preferably a leaf spring that can be elastically deformed.

  It is preferable that the intermediate portion of the forcible moving member is a bent portion that is bent in a substantially V shape and is located immediately before the back door.

  According to the present invention, when an unexpected impact force is applied to the back door and this impact force is applied to the open lever, the forcible moving member presses the switching member toward the cancel position, so that the back door can be prevented from opening unexpectedly. . Furthermore, since the switching member can be moved to the linkage position by the electric mechanism even after the collision, the back door can be opened by opening the outside handle.

Hereinafter, the present invention will be described based on illustrated embodiments. In addition, the front and rear directions in the following description are based on the directions of the arrows described in the drawings.
An opening 101 is formed in the rear portion of the vehicle main body 100. An upper end portion of the back door 102 is pivotally attached to the upper edge portion of the opening 101 so as to be rotatable. The back door 102 is rotatable between a closed position indicated by a solid line in FIG. 1 and an open position indicated by an imaginary line in FIG. An outside handle 104 is rotatably provided on the rear surface (outer surface) of the back door 102. A striker 103 protrudes from the lower edge of the opening 101, and a lock device LS with a cancel function is provided at a position corresponding to the striker 103 on the inner surface of the back door 102.
The lock device LS with a cancel function includes a known lock mechanism 10 that can be engaged with and disengaged from the striker 103. The lock mechanism 10 includes a metal case 11 whose entire upper surface is an open surface 11a. An entrance groove 12 into which the striker 103 can enter is formed at a portion of the case 11 facing the striker 103. A pair of rotating shafts 13 and 14 are fixed between the upper plate and the bottom plate of the case 11 so as to face in the substantially vertical direction when the back door 102 is closed. A hook 15 is attached to the rotary shaft 13 so as to be rotatable around the rotary shaft 13, and a pole 16 is attached to the rotary shaft 14 so as to be rotatable around the rotary shaft 14.
The hook 15 includes an engagement groove 17 into which the striker 103 can enter, and an engagement protrusion 18 that can be engaged with and disengaged from the pole 16. The hook 15 can rotate between the locked position shown in FIG. 2 and the unlocked position shown in FIG. 3, and the hook 15 moves to the locked position with the striker 103 engaged with the entry groove 12. The engagement groove 17 locks the striker 103.
The pawl 16 has its engaging portion 19 engaged with the engaging protrusion 18 of the hook 15 to prevent the hook 15 in the locked position from rotating to the unlocked position. It is possible to rotate between the non-engagement positions shown in FIG. The locking portion of the lock mechanism 10 is engaged with the engaging protrusion 18 of the hook 16 and the engaging protrusion 18 of the hook 15 is released, and the engaging portion 19 and the engaging protrusion 18 are disengaged. Is when the lock mechanism 10 is unlocked, and the lock mechanism 10 is unlocked when the pole 16 is moved to the non-engagement position.
A torsion coil spring S1 and a torsion coil spring S2 are provided between the hook 15 and the case 11, and between the pole 16 and the case 11, respectively. The hook 15 and the pole 16 are rotationally biased by the rotational biasing force of the torsion coil spring S1 and the torsion coil spring S2 so as to be locked.

  From the case 11, a pair of left and right extending portions 20 and 23 are integrally extended upward. A lock release lever 30 is pivotally attached to the front surface of the upper end portion of the extension portion 20 so as to be rotatable in the left-right direction by a pivot pin 22 orthogonal to the extension portion 20. A forward-facing horizontal support piece 31 projects from the lower end of the lock release lever 30. The support piece 31 is formed with a rectangular through hole 32 that penetrates the support piece 31. As shown in FIG. 9, a locking hole 35 is formed at the end of the lock release lever 30. The lower end portion of the link member 37 shown in FIGS. 4 to 6, 9, and 12 is a forward bent end portion 36 as shown in FIG. 12. As shown in detail in FIGS. 9 and 12, the lower end portion (the bent end portion 36 and the upper portion thereof) of the link member 37 is covered with a cover member 38 made of synthetic resin. As shown in FIG. 12, the bent end portion 36 and the front end portion of the cover member 38 are inserted into the locking hole 35 so as to be relatively rotatable. Further, as shown in FIG. 12, the cover member 38 (and the bent end portion 36) is pulled out rearward from the locking hole 35 by contacting the front surface of the lock release lever 30 at the front end of the cover member 38. A snap (locking claw) 39 for preventing is provided. As shown in FIG. 10, the upper end of the link member 37 is linked to the outside handle 104. A tension spring S3 is provided between the unlocking lever 30 and the extending portion 23, and the unlocking lever 30 is locked by the pulling force of the tension spring S3 as shown by the solid line in FIG. 4 and FIGS. Held in position. When the outside handle 104 is in the initial position (non-operating position), the lock release lever 30 is located in the lock allowable position, and when the outside handle 104 is operated (lock release operation), it is shown by a virtual line in FIG. Rotates to unlock position.

From the case 11, a support extension part (fixing member) 24 is integrally extended upward in a manner located in front of the extension part 20 and the extension part 23. The rear surface of the motor case 40 made of a synthetic resin material is fixed to the front surface of the supporting extension 24 by bolts B. That is, the case 11 and the motor case 40 are integrated. An electric motor (not shown) is disposed in the motor case 40. This motor is linked to an operation switch (cancellation switch, not shown) provided in the vicinity of the steering wheel in the vehicle. A drive shaft MA extends rearward from the motor. The rear end portion of the drive shaft MA protrudes rearward of the motor case 40 through a boss hole 42 provided in the upper portion of the rear surface 41 of the motor case 40. When the operation switch is OFF, the motor stops, and when the operation switch is operated to the ON side, the drive shaft MA rotates in a predetermined cancel cancellation direction. Further, when the operation switch is turned OFF after the drive shaft MA rotates in the cancel release direction, the drive shaft MA reverses in the cancel direction and returns to the initial position (cancel position). A rotating cam member (switching member) 43 positioned immediately after the rear surface 41 of the motor case 40 is fixed to the rear end portion of the drive shaft MA. When the drive shaft MA of the motor is in the initial position (when the operation switch is OFF), the rotating cam member 43 is in the cancel position shown in FIGS. 4 and 7, and when the motor rotates in the cancel release direction, FIG. 6 and the linkage position shown in FIG. Further, a pair of left and right position holding long holes 46 and a position holding long hole 47 are recessed in the upper rear surface of the support extending portion 24. On the front surface of the rotating cam member 43, an engaging protrusion 48 made of a synthetic resin that can selectively engage with the long holes 46 and 47 for position holding is projected. When the rotating cam member 43 moves to the cancel position, the engaging protrusion 48 engages with the position holding slot 46 (see FIG. 4), and this state is maintained. When the rotating cam member 43 moves to the linkage position, the engaging protrusion 48 engages with the position holding long hole 47 (see FIGS. 5 and 6) and holds this state.
The operation switch and the motor are components of the electric mechanism.

  On the front surface of the rotating cam member 43, a cylindrical engaging protrusion 44 that protrudes forward is provided. On the other hand, a pivot shaft 45 projects from the rear surface of the rotating cam member 43. A locking hole 53 formed in the upper end portion of the open lever 50 located behind the rotating cam member 43 is pivotally attached to the pivot shaft 45 so as to be rotatable in the left-right direction. The lower portion 51 of the open lever 50 is inclined with respect to the upper portion, and the lower portion 51 protrudes below the support piece 31 through the through hole 32 of the lock release lever 30. Since the cross-sectional shape of the lower portion 51 of the open lever 50 is the same as that of the through hole 32, the open lever 50 can slide in the vertical direction without rattling with respect to the through hole 32. When the rotating cam member 43 is in the cancel position, the open lever 50 is in the unlinkable position shown in FIGS. 4 and 7, and when the rotating cam member 43 is rotated to the linked position, the open lever 50 is lowered and moved to FIGS. And it moves to the linkable position shown in FIG. The lower end portion of the open lever 50 is a pressing portion 52 that can be engaged with and disengaged from the contact portion 16 a of the pole 16, and the pressing portion 52 enters the case 11 through the open surface 11 a on the upper portion of the case 11. . When the open lever 50 is in the unlinkable position, the pressing portion 52 is moved upward from the rotation locus of the pole 16, and when the open lever 50 is moved to the linkable position, the pressing portion 52 is rotated by the contact portion 16a of the pole 16. Located in the trajectory.

When the open lever 50 is in the linkable position (the operation switch is ON) and the outside handle 104 is in the non-operating state, the open lever 50 (pressing portion 52) is locked as shown in FIGS. Since it is located at the position, the pole 16 is located at the engagement position and maintains the engagement state with the hook 15. On the other hand, when the open lever 50 is in the linkable position (when the operation switch is ON), if the outside handle 104 is opened to rotate the unlock lever 30 to the unlock position, the open lever 50 ( The pressing portion 52) rotates to the unlocked position shown in FIGS. 3 and 6, and the pressing portion 52 presses the contact portion 16a of the pole 16 to rotate the pole 16 to the non-engagement position. Then, since the engagement between the pole 16 and the hook 15 is released, the hook 15 rotates to the unlocking position, and the striker 103 is unlocked. Therefore, in this state, the back door 102 can be rotated in the opening direction.
When the open lever 50 is in the unlinkable position (when the operation switch is OFF), even if the outside handle 104 is opened and the lock release lever 30 is rotated to the lock release position, the pressing portion 52 of the pole 16 Since it is in a position deviated from the rotation locus of the contact portion 16 a, the pressing portion 52 swings with respect to the pole 16. Therefore, in this case, the operation of the outside handle 104 does not affect the lock mechanism 10 at all.

  In the locking device with a cancel function of the present embodiment, when the open lever 50 is in the position where the linkage is impossible (when the operation switch is OFF), another vehicle collides with the back door 102 from the rear, and the rotating cam member 43. Even if a large impact force is transmitted to the open lever 50, the impact force prevents the open lever 50 from being unexpectedly lowered to the linkable position. That is, the forcible moving member 60 is provided on the rear surface of the supporting extension portion 24 in a manner located below the engagement protrusion 44. The forcible moving member 60 is made of a metal leaf spring that can be elastically deformed, and a lower end portion thereof is fixed to the supporting extension portion 24 by a bolt B. An intermediate portion of the forcible moving member 60 is a bent portion 61 having a V shape in a side view, and an engaging recess (engagement member) that is always engaged with the engaging protrusion 44 from below at the upper end of the forcible moving member 60. 62). As shown in FIG. 10, the front end portion (rear end portion) of the bent portion 61 faces the inner surface (front surface) of the back door 102.

  When the open lever 50 is in the linkage disabled position (when the operation switch is OFF), when another vehicle collides with the back door 102 from behind, the back door 102 is deformed as shown in FIG. At this time, since a forward load of a predetermined value or more is applied to the bent portion 61 from the inner surface of the back door 102, the bent portion 61 is pushed forward. Then, the entire forcible moving member 60 is elastically deformed, and the engaging recess 62 pushes up the engaging protrusion 44 upward to hold the rotating cam member 43 at the cancel position. Therefore, since the open lever 50 is held at the unlinkable position, even if the outside handle 104 is unexpectedly rotated in the opening direction due to a collision, the lock mechanism 10 is not unlocked.

If the forced movement member 60 includes the bent portion 61 positioned immediately before the inner surface of the back door 102 as in the present embodiment, an impact can be easily transmitted from the back door 102 to the forced movement member 60 at the time of a rear collision. Thus, unlocking of the lock mechanism 10 can be reliably prevented.
Further, since the engaging recess 62 of the forced moving member 60 is already engaged with the engaging protrusion 44 before the deformation, when the forced moving member 60 is deformed, the pressing force is applied from the forced moving member 60 to the rotating cam member 43. Reliable transmission. Therefore, the rotating cam member 43 can be reliably held at the cancel position.

Further, since the forced movement member 60 is a leaf spring, even if the forced movement member 60 is elastically deformed and pushes up the engagement protrusion 44 at the time of rear collision, the forced movement member 60 is then elastically returned to the initial shape. Therefore, if the operation switch is turned on after that, the rotating cam member 43 is rotated to the linkable position by the driving force of the motor. Therefore, the back door 102 can be opened by rotating the outside handle 104.
The forced moving member 60 may be plastically deformed beyond the elastic limit due to the impact force. However, since the forcible moving member 60 is formed so as to be easily deformed even after plastic deformation, if the operation switch is turned ON, the rotating cam member 43 is linked while the forcible moving member 60 is deformed by the driving force of the motor. Rotate to possible position. Therefore, also in this case, the back door 102 can be opened by rotating the outside handle 104.

It is a side view of the whole motor vehicle which is one embodiment of the present invention. It is a bottom view which shows the locking mechanism in a locked state with the bottom plate removed. It is a bottom view which shows the lock mechanism in an unlocked state with the bottom plate removed. It is a rear view of a locking device with a cancellation mechanism when an open lever is in a position where linkage is impossible. It is a rear view of the locking device with a cancel mechanism when the open lever is in the linkable position and the outside handle is in a non-operating state. It is a rear view of the locking device with a cancel mechanism when the open lever is in the linkable position and the outside handle is opened. It is a rear view which abbreviate | omits a motor case etc., and shows a locking device with a cancellation mechanism when an open lever exists in a position which cannot be linked. It is a rear view which abbreviate | omits a motor case etc. about the locking device with a cancellation mechanism when an open lever exists in the position which can be linked | linked. It is a disassembled perspective view of the locking device with a cancel mechanism. It is a vertical side view of a back door and a locking device with a cancel mechanism in a normal state. It is a vertical side view of the back door and the locking device with a cancel mechanism at the time of a rear collision. It is a longitudinal cross-sectional view of the connection part of a lock release lever and a link member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Vehicle main body 101 Opening part 102 Back door 103 Striker 104 Outside handle 10 Lock mechanism 11 Case 11a Opening surface 12 Entrance groove 13 14 Rotating shaft 15 Hook 16 Pole 16a Contacting part 17 Engaging groove 18 Engaging protrusion 19 Locking Part 20 23 extension part 22 pivot pin 24 support extension part (fixing member)
30 Lock release lever 31 Support piece 32 Through hole 35 Locking hole 36 Bending end 37 Link member 38 Cover member 39 Snap 40 Motor case 41 Rear surface 42 of motor case Boss hole 43 Rotating cam member (switching member)
44 Engaging projection 45 Pivoting shaft 46 47 Position holding long hole 48 Engaging projection 50 Open lever 51 Lower part 52 Pressing part 53 Locking hole 60 Forced moving member 61 Bending part 62 Engaging recess (engaging part)
B Bolt LS Locking device MA with cancel function Drive shaft S1 S2 Torsion coil spring S3 Tension spring

Claims (4)

A striker fixed to the periphery of the opening at the rear of the vehicle body, a locked state that is provided in a back door that opens and closes the opening, and that keeps the back door closed by engaging with the striker, and the striker. In a lock device having a lock mechanism that can be shifted to an unlocked state for releasing the combination,
When it is possible to move between a linkable position that can be linked to the lock mechanism and a linkless position that cannot be linked, and when it is in the linkable position, the lock position for holding the lock mechanism in the locked state and the lock of the lock mechanism are An open lever that is pivotable to the unlocking position to be released and is urged to rotate toward the locking position by the urging means;
A switching member that moves to a linkage position that moves the open lever to the linkage possible position and a cancellation position that moves the open lever to the linkage impossible position by the driving force of the electric mechanism that is driven by the operation of the cancel switch;
When the open lever is in the linkable position, the open lever is moved to the unlock position in conjunction with the unlocking operation of the outside handle provided on the back door, and the open lever is locked when the outside handle is not operated. An unlock lever that allows movement to a position,
A backdoor locking device comprising: a forcible moving member that is deformed so as to press the switching member toward the cancel position when receiving a load of a predetermined value or more due to a rear collision of the backdoor. The back door locking device according to claim 1,
The forcibly moving member is a back door locking device having one end fixed to a fixing member and the other end having an engaging portion that engages with an engaging protrusion that is integral with the switching member. The back door locking device according to claim 1 or 2,
A locking device for a back door, wherein the forcible moving member is a plate spring that can be elastically deformed. In the back door locking device according to any one of claims 1 to 3,
A locking device for a back door, wherein the intermediate portion of the forcible moving member is a bent portion that is bent in a substantially V shape and is positioned immediately before the back door.

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