JP2005054525A - Door securing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door securing device which allows smooth rotation of a latch and is free from wobbling of an upper plate thereof. <P>SOLUTION: The door securing device has a latch base 9 housed in a cover 8, the latch 3 rotatably arranged in a gap between one face of the latch base 9 and the cover 8, and the upper plate 10. The latch base 9 has a plurality of protrusions 12 formed on the other surface thereof, for abutting on the upper plate 10. Then the cover 8, the latch 3, the latch base 9, and the upper plate 10 are assembled together via a shaft 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door fixing device suitable for fixing a back door, a trunk lid and the like of an automobile.

2. Description of the Related Art As a device for fixing a back door of an automobile, there is known a door lock device including a striker fixed to the lower side of an opening of a vehicle body, and a main body mechanism having a latch, a detent lever, and an open lever attached to the door.
In such a door lock device, when the door is closed and the striker collides with the latch in the open state, the latch rotates with the impact engaged with the striker, and the door and the door support are attracted to each other. . Then, the detent lever engages with the latch in the closed state to restrict the reverse rotation of the latch, and the door is fixed in the closed state.
On the other hand, when the open lever is turned, the detent lever is pulled away from the latch. As a result, the latch is reversely rotated to be in the open state, and the engagement between the latch and the striker is released, so that the door can be opened.

Usually, the main body mechanism has a hook-like cover fixed to the door, a latch base housed in the cover, and an upper plate that stands up above the cover, and the latch and detent lever are on both sides of the lower surface of the latch base. The upper plate is provided with an open lever and an operation cable for operating the upper plate.
In order to reduce the number of parts and reduce the weight, the latch, the cover, the latch base, and the upper plate may be assembled by one shaft (see Patent Document 1).
However, if the shaft is too short or the shaft is tightened too much, the gap between the lower surface of the latch base and the cover becomes narrow, and the latch disposed here may be pushed in, preventing smooth rotation.

Japanese Patent Laid-Open No. 9-60371

  The problem to be solved by the present invention is to provide a door fixing device that smoothly rotates the latch even if there is a dimensional error or the like, and prevents rattling of the upper plate.

  In order to solve the above problems, a door fixing device of the present invention comprises a striker fixed to one of a door or a door support and a main body mechanism attached to the other, the main body mechanism being a door or door support. A cover fixed to the other of the two, a latch base housed in the cover, a latch disposed between one surface of the latch base and the cover, and engaged with the striker by rotating to a closed position An upper plate provided on the other surface of the latch base, and an open pivotally attached to the upper plate and rotating the latch in a direction to release the engagement with the striker by rotating the upper plate. A plurality of protrusions that are in contact with the upper plate on the other surface of the latch base at appropriate intervals to form the cover, the latch, and the latch base. And upper plate are assembled by the shaft.

  Between the one surface of the latch base and the cover, the latch is prevented from reversing from the closed position, and the open lever is rotated to rotate in the release direction for releasing the restriction on the latch. A detent lever may be provided, and the cover, detent lever, latch base, and upper plate may be assembled by another shaft.

  According to the present invention, the protrusion of the latch base abuts against the upper plate to prevent the upper plate from rattling, and the shaft for assembling the cover, latch, latch base and upper plate is too short or too tight. Since the projections are crushed and dimensional errors are absorbed, the distance between the cover and the latch base does not become narrower than the thickness of the latch, and the latch can rotate smoothly.

Hereinafter, an embodiment which is an automobile back door fixing device will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the door fixing device of the present invention includes a striker 1 fixed to a lower edge of an opening as a door support, a latch 3, a detent lever 4, an open lever attached to a back door. 5 and a main body mechanism 2 having a slide member 6 and a lock lever 7.
The striker 1 is formed by bending a metal rod into a substantially U-shape and protruding upward.

The body mechanism 2 includes a box-shaped cover 8 that is exposed and fixed to the lower surface of the back door, a latch base 9 that is housed and fixed in the cover 8, and an upper plate 10 that is attached to the upper surface of the latch base 9. Is provided.
The cover 8 is made of metal, and a striker entrance 11 is formed on the lower surface thereof.
The latch base 9 is made of synthetic resin, and as shown in FIG. 7, a plurality of protrusions 12 protrude from the upper surface at appropriate intervals. Since these protrusions 12 abut against and support the lower surface of the upper plate 10, it is desirable to arrange them in a balanced manner on the entire upper surface of the latch base 9 so that the upper plate 10 does not rattle. As shown in FIG. 2, a striker receiving recess 13 is formed on the lower surface of the latch base 9 at a position that coincides with the striker advance inlet 11 of the cover 8.
The upper plate 10 is formed by bending a metal plate. As shown in FIGS. 7 and 8, the upper plate 10 includes a fixed piece 14 fixed to the upper surface of the latch base 9 and an upright piece 15 bent at one end of the fixed piece upward. Have.

The latch 3 is rotatably attached to a side between the lower surface of the latch base 9 and the cover 8 with the striker receiving recess 13 interposed therebetween by a shaft 16 penetrating the cover 8 and the latch base 9 vertically.
Further, the latch 3 is formed with a notch that engages with the striker 1. When the latch 3 is in the open state, this notch opens toward the opening side of the striker advance entrance 11.
However, when the back door is closed and the striker 1 entering the striker entrance 11 collides with the latch 3 and the latch 3 is rotated by the impact, the notch rotates while receiving the striker 1 and crosses the striker entrance 11. The striker 1 cannot escape from the striker entrance 10, and the back door is fixed in a closed state. The latch 3 is urged in the open direction by a first spring 17 mounted on the outer periphery of the shaft 16.

As shown in FIG. 8, the detent lever 4 is another shaft that vertically penetrates the cover 8 and the latch base 9 between the lower surface of the latch base 9 and the cover 8 on the other side of the striker receiving recess 13. 18 is rotatably attached.
Further, the detent lever 4 is urged in a direction approaching the outer peripheral surface of the latch 3 by a second spring 19 mounted on the outer periphery of the other shaft 18, engages with the latch 3 in the closed state, and Is restricted from rotating to an open state.

When the detent lever 4 engaged with the latch 3 in the closed state is rotated in the releasing direction against the biasing force of the second spring 19, the latch 3 biased by the first spring 17 is Returning to the open position at once, the engagement between the latch 3 and the striker 1 can be released, and the back door can be opened.
Further, one end of the detent lever 4 stands upward, and an abutting piece 20 exposed to the front of the latch base 9 is formed.
Since the related structure of the striker 1, the latch 3 and the detent lever 4 is conventionally known, the operation sequence is not shown.

The fixing piece 14 of the upper plate 10 is placed on the protrusion 12 of the latch base 9 and fixed to the upper surface of the latch base 9 by the shaft 16 and the other shaft 18. As shown in FIG. 2, a motor case 21 is mounted on the rear surface of the upright piece 15 of the upper plate 10.
As shown in FIGS. 1 and 6, the open lever 5 is pivotally attached to the front side other side (near the detent lever 4) of the upright piece 15 by a first support shaft 22.
The open lever 5 is formed in a straight bar shape having a substantially U-shaped cross section, and passes through the center portion of the open lever 5 with the first support shaft 22 (FIGS. 3 and 5), and the lower end portion is a contact piece of the detent lever 4. It faces one side of 20.

The open lever 5 is urged by a coil spring 23 in a direction in which a lower end portion thereof moves away from the contact piece 20 of the detent lever 4.
Further, the lower end portion of the open lever 5 is provided with a front piece 24 and a rear piece 25 arranged on the front and rear sides of the contact piece 20, and the front piece 24 and the rear piece 25 are long in the axial direction. The holes 26 are formed so as to face each other (FIG. 6). The upper end portion of the long hole 26 is located above the contact piece 20 of the detent lever 4, and the lower end portion of the long hole 26 reaches below the upper end of the contact piece 20.
Further, the tip of the cable 27 is connected to the upper end of the open lever 5, and when the cable 27 is operated to pull the upper end of the open lever 5 to one side, the front piece 24 and the rear piece 25 of the open lever 5 are brought into contact with each other. It passes through the front and rear sides of the contact piece 20.

The lock lever 7 is rotatably attached to the front surface of the upright piece 15 by a second support shaft 28 provided on the side of the first support shaft 22 (FIGS. 1 and 3).
The lock lever 7 has a base portion bent at a substantially right angle so as to extend upward and in the direction of the open lever 5, and the second support shaft 28 passes through the center of the base portion.
One end of the lock lever 7 toward the open lever 5 is bent forward at a right angle, and further, its tip is bent at a right angle to extend to a position reaching the front of the center of the open lever 5.
The other end of the base portion of the lock lever 7 is inclined upward in the other direction, and a long guide hole 29 is formed in this portion in the axial direction.

The upper end portion of the slide member 6 is pivotally attached to one end portion of the lock lever 7 by the third support shaft 30.
The slide member 6 is formed in a thin plate shape using synthetic resin as a raw material, and is disposed on the same axis as the open lever 5 so as to overlap one end of the front surface thereof, and is slidable along the open lever 5. (FIG. 4).
The rear surface of the lower end of the slide member 6 protrudes in a direction intersecting the sliding direction of the slide member 6 and the rotation direction of the open lever 5 and is slidably engaged with the long hole 26 of the open lever 5 The shaft 31 is provided integrally (FIG. 6).

As shown in FIGS. 1 and 2, a rotating member 32 projects from the other side of the motor case 21 so as to be located behind the other end of the lock lever 7. The base of the rotating member 32 is attached to the motor case 21 so as to rotate about an axis along the front-rear direction.
Further, a locking shaft 33 extending in the front-rear direction is formed at the distal end portion of the rotating member 32, and the front end portion of the locking shaft 33 is slidably engaged with the guide hole 29 of the lock lever 7. .
The rotating member 32 is rotated by an actuator 34 and can be switched between an upper position where the tip end is raised and a lower position where the tip end is processed. The motor 35 that drives the actuator 34 is housed near one side of the motor case 21.

When the rotating member 32 is lowered to the lower position, the other end of the lock lever 7 connected via the locking shaft 33 and the guide hole 29 is pushed down, and one end of the lock lever 7 is rotated upward. .
Then, the slide member 6 pivotally attached to one end of the lock lever 7 rises to the lock position along the open lever 5, and the pressing shaft 31 of the slide member 6 reaches the upper end of the long hole 26 of the open lever 5.
In this state, when the cable 27 is operated to pull the upper end of the open lever 5 to one side, the open lever 5 and the slide member 6 rotate counterclockwise in FIG. 1 and are provided at the lower end of the open lever 5. Further, the front piece 24 and the rear piece 25 pass through the front and rear of the contact piece 20 of the detent lever 4, but the pressing shaft 31 of the slide member 6 in the locked position is located above the contact piece 20. There is no effect on the piece 20.

On the other hand, when the rotation member 32 is rotated to the upper position, the other end of the lock lever 7 is pushed up, one end of the lock lever 7 is lowered, and the slide member 6 slides toward the lower end of the open lever 5. Move.
When the slide member 6 moves to the unlocked position, the pressing shaft 31 of the slide member 6 reaches the lower end of the long hole 26 of the open lever 5.

When the cable 27 is pulled in this state and the open lever 5 and the slide member 6 interlocked therewith are rotated, the pressing shaft 31 located at the lower end of the long hole 26 of the open lever 5 hits the contact piece 20 of the detent lever 4. And press it to the other side.
As a result, the detent lever 4 is pulled away from the latch 3 and rotated to the release position, the latch 3 returns to the open state by the force of the first spring 17, and the engagement between the striker 1 and the latch 3 is released.
The striker 1 may be fixed to the door, and the main body mechanism 2 may be attached to the door support.
The door fixing device of the present invention can also be applied to doors other than automobile doors.

The front view of the door fixing device which shows the Example of this invention. Rear view of the above. Sectional drawing of the principal part of a door fixing device. The principal part enlarged view of FIG. The partially broken top view of an open lever and a slide member. The principal part side view of an open lever and a slide member. Sectional drawing of the one side lower part of a door fixing device. Sectional drawing of the other side lower part of a door fixing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Striker 2 Main body mechanism 3 Latch 4 Detent lever 5 Open lever 6 Slide member 7 Lock lever 8 Cover 9 Latch base 10 Upper plate 11 Striker entrance 12 Protrusion 13 Striker receiving recessed part 14 Fixed piece 15 Standing piece 16 Shaft 17 First spring 18 Other shaft 19 Second spring 20 Abutting piece 21 Motor case 22 First support shaft 23 Coil spring 24 Front piece 25 Rear piece 26 Long hole 27 Cable 28 Second support shaft 29 Guide hole 30 Third support Shaft 31 Pressing shaft 32 Rotating member 33 Locking shaft 34 Actuator 35 Motor

Claims (2)

  A striker fixed to one of the door or the door support and a main body mechanism attached to the other, the main body mechanism being housed in the cover and a cover fixed to the other of the door or the door support A latch base, a latch disposed between one surface of the latch base and the cover, and engaged with the striker by rotating to a closed position; an upper plate provided on the other surface of the latch base; An open lever that is pivotably attached to the upper plate and rotates in a direction to release the engagement with the striker by rotating the upper plate, and the upper plate on the other surface of the latch base A plurality of protrusions that come into contact with each other are formed at appropriate intervals, and the cover, latch, latch base, and upper plate are assembled by a shaft. Door locking device according to claim and. Between the one surface of the latch base and the cover, the latch is prevented from reversing from the closed position, and the open lever is rotated to rotate in the release direction for releasing the restriction on the latch. The door fixing device according to claim 1, wherein a detent lever is provided, and the cover, the detent lever, the latch base, and the upper plate are assembled by another shaft.

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