JP4435621B2 - Safety mechanism of door lock device - Google Patents

Description

  The present invention relates to a safety mechanism for a door lock device that prevents the door lock device from being unlocked by an impact such as a collision.

A door lock device such as a back door of a general automobile includes a striker provided on one of a support body such as a vehicle body and the door and a rotatable latch attached to the other, and the striker is installed when the door is closed. The latch is rotated by the impact of the collision with the latch, and the latch and the striker are engaged to lock the door.
The latch is biased in the direction that disengages the striker, but when engaged with the striker, the rotation is restricted by the detent lever, and the door handle installed on the outer surface of the door is operated. When the open lever is rotated and the detent lever is pressed and released from the latch by the open lever, the latch rotates by the biasing force, the engagement between the striker and the latch is released, and the door opens. Yes.

By the way, conventionally, as a mechanism for transmitting the operating force of the door handle to the open lever, the base of the door handle and one end of the open lever are connected by a rod, and when the door handle exposed on the outer surface of the door is pulled up, the rod opens. There is known a lock release mechanism in which one end of the open lever is pushed down and the other end of the open lever presses the detent lever (see Patent Document 1 and Patent Document 2).
However, in the conventional mechanism described above, when the vehicle body and the door relatively move in the door lock portion due to an impact such as a collision, the open lever may be raised with respect to the door handle and pushed by the rod. , There is a concern that the lock will come off and the back door will jump up and people and things will jump out.

Japanese Examined Patent Publication No. 7-81437 JP-A-10-129267

  The problem to be solved by the present invention is to provide a safety mechanism for a door lock device that prevents a door from being opened due to an impact such as a collision being released.

The safety mechanism of the door lock device of the present invention includes a latch that engages with a striker to lock the door in a closed state, and an opener device that rotates the latch in a direction to release the engagement with the striker. , the opener device is slidable along the axial direction, when slid to an open direction, a slide member for releasing the engagement between the latch and the striker, and an operating unit, the operating unit Is composed of a rotation lever for unlocking operation, a guide plate for guiding the slide member, and a pressure lever that is detachably engaged with the slide member, and the pressure lever locks the rotation lever. the slide member engages when releasing operation, which together with the sliding to an open direction, and the striker and the latch is in the door lock engaged, out of the trajectory of the front Symbol slide member Avoidance position near is, the guide plate, and a guide hole for guiding the pressing lever and the retracted position and a position for engaging the slide member, is provided a support pin for guiding the slide member.

  According to the present invention, only when the operation unit is opened, the operation unit and the slide member are engaged and unlocked, and the door can be opened, but when the door is locked, Since the slide member does not engage, even if the door and the vehicle body move relative to each other due to an impact such as a collision, the slide member is not pushed in the open direction by the operation unit, and the latch is released in the direction in which the striker is disengaged. Therefore, it is possible to prevent an accident that the door opens unexpectedly.

Hereinafter, an embodiment relating to a back door of an automobile will be described in detail based on the drawings.
As shown in FIGS. 1 and 2, the door lock device is attached to the striker fixed to the vehicle body and is pivotably attached to the back door. When the back door is closed, the door lock device is rotated by the impact of the striker colliding. A latch that locks the back door in a closed state by engaging with the striker and an opener device 1 that rotates the latch in a direction to release the engagement with the striker are provided.
The structure of the latch and striker is the same as that of the conventional one and is not shown in the figure. However, the latch is biased in the direction to release the engagement with the striker and the rotation in the release direction is restricted by the detent lever. When the opener device 1 is operated to disengage the detent lever from the latch, the latch is rotated at a stroke by the urging force to release the striker.

The opener device 1 has a slide member 3 whose one end is pivotally attached to the open lever 2 and is supported so as to be slidable along the axial direction, and a rotatable operation unit 4.
The open lever 2 is biased in a direction away from the detent lever by a spring 5. When the open lever 2 is rotated against the biasing force, the open lever 2 engages with the detent lever and presses it in a direction to release from the latch.

A slit 6 is formed in the slide member 3 along the axial direction, and a support pin 7 fixed to the back door is slidably engaged with the slit 6, and the slit 6 is a support pin. By moving with respect to 7, the slide member 3 slides in the axial direction.
When the slide member 3 slides in the open direction (arrow A direction in FIG. 2), the open lever 2 rotates against the urging force and presses the detent lever to release the engagement between the latch and the striker. Let
Further, a step portion 8 that can be engaged with the operation portion 4 is formed on a side edge of the slide member 3 facing the operation portion 4.

The operation unit 4 includes a rotation lever 10 whose intermediate part is supported by a support shaft 9, a guide plate 15 that guides the slide member 3, and a pressing lever 11 whose tip can be engaged with the step part 8 of the slide member 3. It consists of.
One end closer to the pivot 9 of the pivoting lever 10 is curved in a substantially U shape, and a door handle 12 is attached to the tip thereof. The door handle 12 is exposed on the outer surface of the back door.
The pressing lever 11 is formed of a band plate, and a base end portion thereof is pivotally attached to the other end portion of the rotating lever 10 via a pin 13. In addition, a slide projection 14 is provided at an intermediate portion of the pressing lever 11.

A guide plate 15 is installed so as to cross the sides of the slide part 3, the rotation lever 10 and the pressing lever 11.
One end of the guide plate 15 is fixed to the back door by a fixture 16 such as a screw, and the other end of the guide plate 15 is fixed to the back door by the support shaft 9.
The guide plate 15 is formed with a guide hole 17 in which the slide protrusion 14 of the pressing lever 11 is slidably engaged. The guide hole 17 is a gently curved slit, one end of which is closest to the slide member 3 and located closer to the opening direction of the slide member 3, and the other end is farthest from the slide member 3, and , Located on the opposite side to the open direction compared to one end.
The support pin 7 that guides the slide member 3 is provided on the guide plate 15 on the side of the guide hole 17.

As shown in FIG. 2, when the slide protrusion 14 is positioned at one end of the guide hole 17, the pressing lever 11 is closest to the sliding member 3, and the tip of the pressing lever 11 is at the step portion 8 of the sliding member 3. Engage and push down to slide the slide member 3 in the open direction.
On the other hand, as shown in FIG. 1, when the slide protrusion 14 is positioned at the other end of the guide hole 17, the pressing lever 11 moves away from the sliding member 3, and the pressing lever 11 is retracted away from the track of the sliding member 3. In position.

In the normal state, as shown in FIG. 1, one end of the rotation lever 10 and the door handle 12 attached to one end are lowered, and the door handle 12 is in contact with a stopper 18 installed on the back door. On the other hand, the pressing lever 11 pivotally attached to the other end and the other end of the rotating lever 10 is raised, and the slide protrusion 14 is located at the other end of the guide hole 17.
Further, the open lever 2 is moved away from the detent lever by the urging force of the spring 5, so that the door lock state in which the latch and the striker are engaged is maintained. The slide member 3 pivotally attached to the open lever 2 slides to the upper position, and the step portion 8 of the slide member 3 and the tip of the pressing lever 11 are separated from each other.
At this time, even if a strong impact is applied due to a collision or the like, and the vehicle body and the back door move relative to each other in the door lock portion, the slide member 3 and the operation portion 4 are Since they are separated, the slide member 3 is not pushed in the open direction, and there is no concern that the slide member 3 rotates the open lever 2 and the engagement between the latch and the striker is released.

When releasing the door lock device, as shown in FIG. 2, the door handle 12 exposed on the outer surface of the back door is pulled up from the outside of the vehicle. Then, the rotation lever 10 is rotated about the support shaft 9 and the other end is lowered, and the pressing lever 11 pivotally attached to the other end of the rotation lever 10 is lowered.
Along with this, the slide protrusion 14 provided on the pressing lever 11 slides along the guide hole 17, and the tip of the pressing lever 11 engages with the step portion 8 of the sliding member 3 to push down the sliding member 3.
As a result, the open lever 2 rotates against the urging force of the spring 5, the detent lever is released from the latch, and the latch and the striker are disengaged.

In addition, this invention is not limited to the said Example, It can apply also to door lock apparatuses other than the back door of a motor vehicle.
Further, the shapes of the door handle and the open lever can be changed as appropriate.

The side view in the door lock state of the safety mechanism of the door lock device which shows the Example of this invention. The side view in the lock release state of the safety mechanism of the door lock device which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opener device 2 Open lever 3 Slide member 4 Operation part 5 Spring 6 Slit 7 Support pin 8 Step part 9 Support shaft 10 Rotating lever 11 Pressing lever 12 Door handle 13 Pin 14 Slide protrusion 15 Guide plate 16 Fixing tool 17 Guide hole 18 Stopper

Claims (1)

Engaged with the striker, a latch to lock the door in the closed state, e Bei the opener device to rotate the latch in a direction to release the engagement with the striker, the opener device, along the axial direction And a sliding member for releasing the engagement between the latch and the striker when sliding in the open direction, and an operating portion, the operating portion being a rotation lever for unlocking operation when the guide plate for guiding the slide member consists of a said slide member and detachably pressing lever which engages, push pressure lever, the slide member and engaged when the unlocking operation of the pivot lever combined, which together with the sliding to open direction, wherein the striker and the door locked state in which the latch is engaged, Ri retracted position near deviated from the track before Symbol slide member, said guide plate, said And the guide hole for guiding the pressure lever and the retracted position and a position for engaging the slide member, said safety mechanism of the door lock apparatus characterized in that the slide member is provided with a support pin for guiding.

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