JPH0960386A - Car door opening limit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid collision against a door and enhance safety by locking a large opening motion of a door so as to limit the opening of the door beyond a specified value in the case, when the door is slightly opened, if an obstacle approaches from backward. SOLUTION: A pair of projections 3 are projectingly provided on upper and lower surfaces of a door check arm 2 and a pair of stopper cams 4 removably engaged therewith are turnably provided as well. A rotary mechanism, which removably engages the paired cams 4 with the projections 3 provides a gear 5 on each stopper cam 4. An idler gear 6 is laid out between these two gears. A rack 8, which moves forward and backward with an actuator 7 based on a signal of an obstacle sensor 9, is engaged with one gear. At the point of time when a door main body 1 is opened in a small opening range than a half-opening and an obstacle sensor detects the approach of a car behind, the actuator 7 is operated and turned so as to engage the stopper cam 4 with the projection 3 of the door check arm 2 by way of the rack 8, thereby locking the movement in the opening direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door opening limiting device capable of restraining a large opening of a door when an obstacle approaches from behind a vehicle.

[0002]

2. Description of the Related Art Doors of automobiles are provided with a door opening limiting device (door opening stopper) for gradually opening the door. This is due to a door check arm inserted into the door at one end and the other end at the door hinge side, as is well known.

[0003]

Although the door opening limiting device using the door check arm can gradually increase the opening degree of the door, the door can be freely opened up to the maximum opening degree at any time. it can. Therefore, when another vehicle or the like approaches from the rear of the vehicle when trying to open the door, it may collide with the door when the door is opened greatly.

In view of the above conventional problems, an object of the present invention is to
It is an object of the present invention to provide a door opening limiting device that locks the opening of a door so that it cannot be opened further when an obstacle is approaching from behind the vehicle when the door is opened slightly.

[0005]

The structure of the present invention for achieving the above object is a projection provided on a door check arm with the door slightly opened in the vicinity of the door check arm for limiting the opening of the door. Locking means for engaging with the door to regulate the opening of the door, and an obstacle sensor for sensing an obstacle moving from the rear of the vehicle on the inner surface opposite to the hinge side of the door and operating the locking means. It is characterized by having.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a door body, and 2
Is a door check arm. As is well known, the door check arm 2 is provided with a convex portion 2a for restricting the half-opening of the door and a stopper 2b for restricting the full-opening of the door.

According to the present invention, in the above structure, the door check arm 2 has a protrusion 3 for restricting an opening smaller than the half-opening of the door, a stopper cam 4 engaged with and disengaged from the protrusion 3, and the stopper cam 4 is rotationally operated. And an obstacle sensor 9 for sensing the obstacle moving from the rear of the vehicle on the inner surface of the door body 1 opposite to the hinge side and operating the lock means. It is equipped with and.

The locking means will be described in more detail. A pair of protrusions 3 are provided on the upper and lower surfaces of the door check arm 2, and a pair of stopper cams 4 that engage with and disengage from the protrusion 3 are also rotatably installed.

The rotating mechanism for engaging and disengaging the pair of stopper cams 4 with the projection 3 is provided with a gear 5 on each stopper cam 4 and an idler gear 6 between the two gears.
And a rack 8 which is moved forward and backward by an actuator 7 based on a signal from an obstacle sensor 9 in one gear 5.
It is a structure that meshes.

According to the present invention, when the door body 1 is opened with a smaller opening than half-opening when getting on and off, the present invention has
When another vehicle approaches from behind the vehicle, as shown in FIG. 2, when the approaching vehicle is captured within the sensing range of the obstacle sensor 9, the actuator 7 is activated by the sensing signal. It operates to rotate the stopper cam 4 via the rack 8 so as to engage with the protrusion 3 of the door check arm 2.

The stopper cam 4 engages with the projection 3 of the door check arm 2 to lock the movement of the door body 1 in the opening direction, which is opened with an opening smaller than the half-opening, to restrain the further opening of the door. And avoid collisions.

After the approaching vehicle has passed, the actuator 7 is deactivated and the stopper cam 4 is reversely rotated to be unlocked. Thereafter, the original half-opening and full-opening of the door check arm 2 is restricted. .

[0013]

EXAMPLE A solenoid having a return spring is suitable for the actuator 7, and an obstacle sensor 9 is used.
Is suitable as an ultrasonic sensor used in automobile backsona.

This ultrasonic sensor is composed of a combination of a transmitter for emitting an ultrasonic wave and a receiver for receiving an ultrasonic wave reflected from an obstacle, and does not operate even if it receives a reflected wave of the ultrasonic wave. The reflective object senses and operates by the Doppler effect only when the reflective object approaches, moves away, or moves, and is optimal as the obstacle sensor 9 used in the present invention.

Incidentally, it is also possible to use a sound alarm by operating the piezoelectric buzzer in combination with the lock operation.

[0016]

As described above, according to the present invention, a large opening operation of the door is locked when an obstacle such as a vehicle approaches from the rear when the door is opened, so that the collision with the door is avoided. It has the effect of safety.

[Brief description of drawings]

FIG. 1 is an inside view of a door equipped with the device of the present invention.

FIG. 2 is an explanatory view of a state in which the door is slightly opened and the approach of a rear obstacle is sensed.

[Explanation of symbols]

 1 Door Main Body 2 Door Check Arm 2a Convex Part that Restricts Door Half Open 2b Stopper that Restricts Door Full Open 3 Protrusion 4 Stopper Cam 5 Gear 6 Idler Gear 7 Actuator 8 Rack 9 Obstacle Sensor

Claims (1)

[Claims] 1. Locking means for engaging a protrusion provided on the door check arm to restrict the opening of the door when the door is slightly opened near the door check arm for limiting the opening of the door, and a hinge side of the door. A door opening limiting device for a vehicle, comprising: an obstacle sensor that senses an obstacle moving from the rear of the vehicle and operates the locking means on an inner surface opposite to the above.