JPH076420Y2 - Vehicle door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle door locking device, and more particularly to a door locking device capable of reliable locking with a light touch.

[Conventional technology]

A locking device for a vehicle door is generally one in which a latch plate provided on the door is engaged with a striker provided on the edge of the door opening.

[Problems to be solved by the invention]

In this case, in order to completely engage the latch plate and the striker, it is necessary to pull the door sufficiently into the opening.
Due to the reaction force of the door weather strip and the pressure increase in the vehicle interior, the latch plate and the striker are in a so-called half-door state in which the latch plate and the striker are half-engaged unless the door is closed vigorously.

Therefore, it is difficult for a weak child to completely lock the door, and on the other hand, when the door is strongly closed, the impact sound and the increase in the indoor pressure cause a passenger discomfort.

The present invention has been made in view of such a problem, and an object thereof is to provide a vehicle door locking device capable of reliably locking the door with a light touch and reducing the load on the drive motor. To do.

[Means for solving problems]

The structure of the present invention will be described. A latch plate 1 that locks the door by rotationally engaging a striker provided at a door opening edge of a vehicle body through a half-engaged state, and a half-engaged state of the latch plate 1 and the striker. And a drive motor 4 that starts the operation by a half-engagement detection signal issued from the detection means 3 and stops the operation by eliminating the signal.
And a cam plate provided on the output shaft of the drive motor 4 and having a cam surface 42a formed on the outer periphery thereof, which gradually separates from the output shaft with rotation and returns to the original position closest to the output shaft stepwise when rotated once. 42 and one end of the cam surface 42a come into contact with the cam surface 42a, and are pressed by the cam surface 42a to swing around the central shaft fulcrum 81, and the other end presses and rotates the latch plate 1 to the complete engagement position. The lock arm 8 returns to the original position of the cam surface 42a.

[Action, effect]

According to the door locking device having the above structure, when the door is closed with the light touch to be in the half-door state, after that, the drive motor 4
As a result, the latch plate 1 is automatically completely engaged with the striker, and the door is securely locked.

Therefore, the door lock is completely performed even by a weak child, and the occupant does not feel uncomfortable due to the strong closing of the door.

The reaction force of the lock arm 8 when the latch plate 1 is pressed is applied to the outer peripheral surface of the cam plate 42, which is perpendicular to the output shaft of the drive motor 4, so that the motor output is relatively small. The lock arm 8 can be swung with a sufficiently large acting force against the reaction force.

Further, since the shape of the cam surface 42a is gradually separated from the motor output shaft, the reaction force of the lock arm 8 also gradually increases and the motor load does not suddenly increase. Therefore, the load on the drive motor 4 is reduced.

Further, the lock arm 8 provided between the cam plate 42 and the latch plate 1 makes it possible to amplify the latch plate operating force by the lever principle, and at the same time, the cam plate 42 (driving motor 4) and the latch plate 1 The degree of freedom of the installation position relative to is also improved.

〔Example〕

In FIG. 1, a latch plate 1 is provided inside the door panel P on the end face facing the opening edge, and the latch plate 1 supports the spindle 11
It is rotatable around and is urged and held in the posture shown in FIG. 2 by a spring member (not shown) attached to the support shaft 11. A notch 12 is formed in the latch plate 1, and the notch
12 is facing the striker 2 provided at the door opening edge. A latch pin 13 is erected on the plate surface of the latch plate 1.

A limit switch 3 as a detecting means is provided above the latch plate 1, and a contact 31 of the limit switch 3 is in contact with the outer peripheral surface of the latch plate 1. One portion of the outer peripheral surface is projected outward to form a protrusion 1a. Below the latch plate 1 is provided a lock plate 5 which is rotatably supported by a support shaft 51, and the lock plate 5 is shown in FIG. 2 by a spring member (not shown) attached to the support shaft 51. It is held in a posture.

The lock plate 5 is partially extended (FIG. 1),
The tip of the unlock arm 6 is in contact with the extending portion 52. The unlock arm 6 is supported at its center by a support shaft 61, and one end of an unlock wire 62 is locked to the base end thereof. The unlock wire 62 reaches a door handle (not shown).

A drive motor 4 is fixed to the door panel P, and a cam plate is attached to an output shaft protruding from the gear box 4 of the motor 4.
42 is provided. As shown in FIG. 3, the cam surface 42a on the outer periphery of the cam plate 42 is a peripheral surface that starts from the original position closest to the center of the output shaft and gradually moves away from the center. It forms a stepped surface 42b that bends inward. The motor 4 is connected to a drive circuit described later by a lead wire 43.

A bracket plate 7 is fixed to the tip side surface of the drive motor 4, and a center of a rock arm 8 is rotatably supported on a support shaft 81 erected on the bracket plate 7. A roller 82 is provided at one end of the lock arm 8 and
82 is in contact with the cam surface 42a of the cam plate 42. The lock arm 8 has a spring member 83 (third part) attached to the support shaft 81.
According to the drawing), the roller 82 is biased so as to abut against the cam plate 42. The other end of the lock arm 8 extends toward the latch plate 1 and is in contact with the lower surface of the latch pin 13.

FIG. 4 shows a motor drive circuit. In the figure, the motor 4 is connected to a drive power source via a relay contact 91a, and the relay coil 91 is energized and excited by a transistor 92. A delay circuit composed of a resistor 93 and a capacitor 94 is formed on the base side of the transistor 92, and the resistor 93 is connected to the control power source through the switch contact 3a of the limit switch 3.

In the door lock device having the above structure, when the door is lightly closed, the striker 2 enters the notch 12 of the latch plate 1,
Along with this, the latch plate 1 rotates counterclockwise, and both are in a half-engaged state (FIG. 5). In this state, when the protrusion 1a of the latch plate 1 abuts against the contact 31 of the limit switch 3 and pushes it up, the switch contact 3a closes, the transistor 92 conducts, and the relay contact 91a closes to drive the motor 4. Be punished. The cam plate 42 is rotated by the driving of the motor 4, and the roller 82 that abuts on the cam surface 42a is the cam surface 42a.
Is pushed outward along the line. As a result, the rock arm 8 swings, and the tip of the arm that abuts the latch pin 13 rises, and the latch plate 1 is further rotated to completely engage the striker 2 (FIG. 6).

During this time, the projection 1a of the latch plate 1 passes directly below the limit switch 3, and the contact 31 moves downward to move the switch contact.
3a opens. Here, the transistor 92 continues to be conductive for a while due to the delay circuit, and the rotation of the motor 4 continues. Then, the roller 82 reaches the stepped surface 42b of the cam 42 and falls inward along the stepped surface 42b. As a result, the tip of the lock arm 8 is fixed to the latch pin as shown by the chain line in FIG.
Move downwards away from the bottom surface of 13. At this time, the return rotation of the latch plate 1 is prevented because it is in contact with the lock plate 5.

As described above, if the door is lightly closed to be in the half-door state, the motor 4 automatically completes the lock of the door.

In this case, the reaction force of the lock arm 8 when the latch plate is operated is
It is applied to the outer peripheral surface of the cam plate 42, which is perpendicular to the rotation axis of the cam plate 42, so that a sufficient latch plate operating force can be obtained even if the motor output is relatively small. Further, the above-mentioned cam surface shape allows the reaction force to gradually increase, so that the motor load can be reduced. Therefore, the motor 4 and the gear box 41 can be made compact.

Further, the operating force can be amplified by the lock arm 8, and the installation positions of the cam plate 42 and the latch plate 1 can be freely set by appropriately changing the shapes thereof.

When the door is opened, when the door handle is operated, the unlock arm 6 is rotated via the unlock wire 62, and the lock plate 5 rotates clockwise in FIG. 6 to be disengaged from the latch plate 1. Then, the latch plate 1 becomes rotatable, and the engagement with the strake 2 is released.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a door locking device, FIG. 2 is a schematic front view of a latch plate installation portion, FIG. 3 is an exploded perspective view of a drive motor portion, FIG. 4 is a circuit diagram of a motor drive circuit, and FIG. , Sixth
Each of the figures is a schematic front view of the latch plate installation portion. 1 …… Latch plate, 1a …… Protrusion 11 …… Spindle, 12 …… Notch 13 …… Latch pin, 2 …… Strike 3 …… Limit switch (Detecting means) 31 …… Contactor 4 …… Drive motor 42 ...... Cam plate, 8 ...... Lock arm 81 …… Spindle, 82 …… Roller P …… Door panel

Claims (1)

[Scope of utility model registration request] 1. A latch plate for rotationally engaging a striker provided at a door opening edge of a vehicle body in a half-engaged state to lock the door, and a detection for detecting a half-engaged state of the latch plate and the striker. Means, a drive motor that starts operation in response to a half-engagement detection signal issued from the detection means and stops operation due to elimination of the signal, and is provided on the output shaft of the drive motor A cam plate formed on the outer periphery of the cam surface that gradually returns and returns to the original position closest to the output shaft stepwise when it makes one rotation, and one end contacts the cam surface and is pressed by the cam surface and the central shaft A door lock device for a vehicle, comprising: a lock arm that swings around a fulcrum, presses and rotates the latch plate to a completely engaged position by the other end, and then returns to the original position of the cam surface.