JP3357507B2 - Vehicle door lock mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door lock mechanism.

[0002]

2. Description of the Related Art As shown in FIG. 7, a door lock mechanism of a vehicle includes a pair of front and rear bell cranks 2a and 2b rotatably supported on a door 1 at predetermined intervals in a vehicle front and rear direction, and a pair of bell cranks. Link rod 3 connecting 2a and 2b
An inner lock knob 5 is connected to one of the bell cranks 2a (front), and a latch attached to the rear end surface of the door 1 is connected to the other bell crank 2b (rear). A link 9 linked to the device 4 (see FIG. 8) is connected to the lock device 4 by operating the inner lock knob 5 so that the locked lock device 4 cannot be unlocked by the door outside handle 6 and the door inside handle 7. 4 is in a locked state and an unlocked state.

As shown in FIG. 8 , the conventional door lock mechanism includes a first lever portion 2a-1 at one end of a front bell crank 2a rotatable in a front-rear direction with a support shaft 10a as a fulcrum.
One end of a rear bell crank 2b rotatable in the front-rear direction with the support shaft 10b as a fulcrum is connected to a first lever portion 2b-1 at one end by a link rod 3, and a second end at the other end of the front bell crank 2a.
An inner lock knob 5 is connected to the lever portion 2a-2, and a link 9 linked to the lock device 4 is connected to the second lever portion 2b-2 of the rear bell crank 2b. The front bell crank 2a and the rear bell crank 2b are oriented such that the second lever portion 2a-2 faces forward in the front bell crank 2a and the second lever portion 2a-2 in the rear bell crank 2b.
The configuration is such that the lever portions 2b-2 are directed backward and opposite to each other, and the first lever portions 2a-1 and 2b-1 are directed upward.

In the conventional door lock mechanism having such a structure, in the state shown in FIG. 8 , the inner lock knob 5 is pulled upward in the unlocking direction indicated by the arrow AR, whereby
The second lever portion 2a-2 of the front bell crank 2a is pulled up to rotate the front bell crank 2a clockwise in FIG. 8 , and the rotation is transmitted to the rear bell crank 2b via the link rod 3 clockwise. Then, the second lever portion 2b-2 of the rear bell crank 2b is pivoted downward to pivot the link 9 downward in the unlock direction indicated by the arrow AR.

FIG . 9 shows a locked state in which the inner lock knob 5 is depressed downward, and the front bell cranks 2a and 2b rotate counterclockwise to move the link 9 upward in the locking direction indicated by the arrow R.

In such a conventional door lock mechanism, when an inertia force is applied during a forward collision of the vehicle, the link rod 3 acts as an inertia mass, and in the unlocked state in which the inner lock knob 5 is lifted, the front and rear doors are locked. When the rear bell cranks 2a, 2b are rotated counterclockwise to a locked state, and in a locked state in which the inner lock knob 5 is pressed down, the locked state is further secured, and even if the door outer handle 6 is operated. When the driver cannot unlatch and is in a state where the occupant cannot operate the inner lock knob 5, the door cannot be opened from the outside, and early rescue in an emergency such as an accident cannot be performed.

In view of such a problem, a weight is attached to the lock and unlock operation mechanism system, and the lock of the door lock device is automatically released by an inertial force acting on the weight at the time of a collision in the longitudinal direction of the vehicle body. No. 5,248,842 or U.S. Pat.
No. 0,531.

[0008]

SUMMARY OF THE INVENTION
No. 42 or U.S. Pat. No. 3,990,531 both have a complicated structure, have a problem in operation reliability and practicality, and have an undesired problem that costs are high.

An object of the present invention is to operate a door lock device in an unlocked state by an inertia force at the time of a frontal collision by a simple mechanism without making a significant structural change to a conventional door lock mechanism having a general basic configuration. It is an object of the present invention to provide a vehicle door lock mechanism.

[0010]

In order to achieve the above object, the present invention is directed to a vehicle having a door provided at a predetermined interval in a longitudinal direction of a vehicle body.
A pair of front and rear L-shaped bell clans that are rotatably supported
The inner lock knob is connected to one of the bell cranks
The other bell crank is linked with the door lock device and
Link that locks when moving in the direction of the axis and unlocks when moving in the downward direction
To lock the door lock device in the event of a forward collision of the vehicle.
Inert rotation of the pair of front and rear bell cranks in the lock release direction
Inertia mass between the pair of front and rear bell cranks
It is characterized by being connected by a link rod .

[0011]

According to the above construction, the front and rear sides of the vehicle at the time of a forward collision of the vehicle can be improved.
The pair of front and rear bell cranks are inertially rotated in the unlock direction of the door lock device by the inertial force acting on the link rod connecting the bell cranks, and the inner lock knob is moved in the unlock direction to unlock the inner lock knob. Automatically unlocks the door lock device without having to do it.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention. The present invention
In the link, the link rod 3 connecting the front and rear bell cranks 2a and 2b acts as an inertia mass to enable unlocking at the time of a forward collision of the vehicle.

As shown in FIG. 1, the first lever portion 2a of each of the L-shaped front and rear bell cranks 2a and 2b has a structure.
The first and second lever portions 2a-2 of the front bell crank 2a to which the inner lock knob 5 is connected face forward so that 1, 2b-1 are positioned below the fulcrum of the support shafts 10a and 10b. The second lever portion 2b-2 of the rear bell crank 2b to which the linked link 9 is coupled is arranged rearward, and the downward first lever portion 2a-1,
2b-1 is connected by a link rod 3 at a position below the fulcrum of the support shafts 10a and 10b.

In the configuration of this embodiment , when the vehicle collides forward and the impact force F acts on the link rod 3, the inertia force M acts on the link rod 3 in the forward direction of the vehicle, and the link rod 3 acts as an inertia mass. As a result, the front and rear bell cranks 2a and 2b rotate clockwise to unlock the door lock device by inertia, move the inner lock knob 5 in the arrow AR direction of the unlocking direction, and lock the link 9 to the door lock. The door lock device is automatically unlocked without moving the inner lock knob 5 by unlocking the inner lock knob 5 in the direction of the arrow AR in the unlock direction of the device.

FIGS. 3 and 4 show a first modified example of the embodiment in which the link rod 3 is used as an inertial mass. In the first design modification example, the first lever portion 2a-1 of the front bell crank 2a faces downward so as to be located below the fulcrum of the support shaft 10a, and the second lever portion 2a-2 to which the inner lock knob 5 is coupled. Is directed forward, the first lever portion 2b-1 of the rear bell crank 2b is directed upward so as to be located above the fulcrum of the support shaft 10a, and the second lever portion 2b-2 to which the link 9 linked to the door lock device is coupled. Is arranged so as to face forward, and the lower first lever portion 2a-1 of the front bell crank 2a and the upper first lever portion 2b-1 of the rear bell crank 2b are connected by a link rod 3 at an axis of an inclined angle. It is.

In the configuration of the first design modification, when the vehicle collides forward and the impact force F acts on the link rod 3, the inertia force M acts on the link rod 3 in the forward direction of the vehicle, and the link rod 3 Acts as a mass, whereby the front bell crank 2a moves clockwise and the rear bell crank 2b
Rotates the inner lock knob 5 in the arrow AR direction of the unlocking direction, and moves the link 9 downwardly in the arrow AR direction of the unlocking direction of the door lock device to lock the inner lock knob 5. The door lock device is automatically unlocked without performing the unlocking operation.

FIGS. 5 and 6 show a second modified example of the embodiment in which the link rod 3 is used as an inertial mass. In the second design modification example, the first lever portion 2a-1 of the front bell crank 2a is directed upward, the second lever portion 2a-2 to which the inner lock knob 5 is coupled is directed rearward, and the second lever portion 2a-2 of the rear bell crank 2b. With one lever part 2b-1 facing upward,
The second lever portion 2b-2, to which the link 9 linked to the door lock device is coupled, is disposed facing forward, and the upward first lever portion 2a-1 of the front bell crank 2a and the upward first lever 2b-1 of the rear bell crank 2b. This is a configuration in which the lever portions 2b-1 are connected by a link rod 3.

In the configuration of the second modified example, when the vehicle collides forward and the impact force F acts, the inertia force M acts on the link rod 3 in the forward direction of the vehicle, so that the link rod 3 Acts as a mass, whereby the front and rear bell cranks 2a inertially rotate counterclockwise, move the inner lock knob 5 in the direction of the arrow AR in the unlocking direction, and move the link 9 in the unlocking direction of the door lock device. The door lock device is automatically unlocked without moving the inner lock knob 5 by unlocking the inner lock knob 5 in the direction of the arrow AR.

[0019]

As described above, according to the present invention, the door lock device is locked by the inertia force at the time of a forward collision by a simple mechanism without making a significant structural change to the conventional door lock mechanism of a general basic configuration. It can be operated in the released state, and has the effects of operating reliability and practicality, and reducing the number of components and costs.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the embodiment of FIG. 1;

FIG. 3 is a front view showing a first design modification example of the present invention.

FIG. 4 is an explanatory diagram of an operation of a first design modification example.

FIG. 5 is a front view showing a second design modification example of the present invention.

FIG. 6 is an operation explanatory view of a second design modification example.

FIG. 7 is a vehicle door equipped with a conventional general door lock mechanism.
Perspective view of

FIG. 8 is a front view of a conventional general door lock mechanism.

FIG. 9 is a diagram illustrating the operation of a conventional general door lock mechanism.

[Explanation of symbols]

 2a Front bell crank 2b Rear bell crank 2a-1 First lever part 2a-2 Second lever part 2a-3 Third lever part 2b-1 First lever part 2b-2 Second lever part 2b-3 Third lever part 3 Link rod 5 Inner lock knob 9 Link 10a Support shaft 10b Support shaft

Claims (1)

(57) [Claims] 1. A door rotates in a longitudinal direction of a vehicle body at a predetermined interval.
A pair of front and rear L-shaped bell cranks pivotally supported
Inner lock knob is connected to the other bell crank,
The upper crank moves in conjunction with the door lock device on the bell crank of
Link with the lock to unlock by moving the lower axis
In the event of a forward collision of the vehicle, the door lock device is unlocked.
Inert rotation of the pair of front and rear bell cranks in the release direction
The space between the pair of front and rear bell cranks
Vehicles of the door lock mechanism, characterized in that it was connected by Nkuroddo.