FR2734595A1 - PUSH-BUTTON CONTROL DEVICE FOR A BOX LOCK - Google Patents

Abstract

Device for push-button control of a boot door lock which includes a fixed guide box (2) of the push-button (1) carrying an operating assembly (6, 7, 8) of a lever for actuating (11) a lock mechanism, characterized by the fact that it includes a stopper (15) of a tilting hook (16) with inertia effect and elastic return for locking the push-button whose movement in the direction of the stopper is slaved to vehicle deceleration.

Description

DEVICE FOR CONTROLLING A PUSH BUTTON

SAFE LOCK

  The invention relates to a push-button control device for a boot door lock, which includes a fixed push-button guide housing carrying a lever operating assembly.

  actuation of a lock mechanism.

  The publication FR-A-1596514 describes a push button subjected to the return force of a spring mounted in compression between a wall of a body

  fixed and a base operated by a lock cylinder.

  In order to reduce the risk of accidental opening of the lock under the effect of an inertia load, it is known to increase the force of

  spring reminder. It follows that the effort of actuation of the button-

  pusher is considerably increased, which remains an obstacle to the

  ease of operation of the lock.

  When a push button of the aforementioned type is intended for controlling a trunk door lock of a vehicle, the increased stiffness of the

  return spring increases the difficulty of actuating the lock.

  The invention proposes to avoid this drawback by proposing a device

  push button control in which the button lock-

  pushbutton occasionally results from an inertia load applied in accordance with the 'uniform requirements relating to the approval of vehicles with regard to locks and fasteners

  doors ". E / ECE / 324 and E / ECEFTRANS / 505 of April 15, 1986.

  On the other hand, in the absence of any inertia load, the push button is subjected to the sole action of its return spring and offers no

  appreciable resistance to the effort of operating the lock.

  According to one embodiment of the invention, the actuating lever of the lock mechanism has a stop for a tilting hook with inertia effect and with elastic return, carried by said guide box, -2 - whose movement towards the stop is controlled by the

vehicle deceleration.

  According to another characteristic of the present invention, the center of gravity of the tilting hook and the tilting axis of said hook are

vertically offset.

  According to another characteristic of the present invention, the pivot axis of the hook is secured to a clamp for immobilizing the guide boot on a wall of the vehicle boot, and the bottom wall of said guide boot constitutes the support guide return springs

  sliding from the push button towards said push button.

  According to another characteristic of the present invention, the stop for the tilting hook articulated on the push button guide housing is

  carried by the actuating lever of the lock mechanism.

  According to another characteristic of the present invention, the stop for the tilting hook articulated on the push button is carried by the housing

for guiding said push button.

  The device thus produced has the advantage of being able to be produced in the form of a pre-assembled module ready for mounting on a door casing.

of motor vehicle trunk.

  Other characteristics and advantages of the invention will become apparent on

  reading the description of an exemplary embodiment of the device in

  reference to the accompanying drawing in which: - Figure 1 is a rear view of a motor vehicle body fitted with a trunk door, Figure 2 is a median cross-section of the trunk door of the vehicle along line II-II of FIG. 1, FIG. 3 is an exploded view of the main elements of the control device,

1

  48M 1 o -3- - Figure 4 is an axial sectional view of the push button control device shown in Figure 2 in accordance with a first embodiment of the invention, - Figure 5 is a sectional view axial view of the push button control device shown in FIG. 2 in accordance with an alternative embodiment of the invention, FIG. 6 is a schematic representation of the operation of the

device according to the invention.

  Figure 1 schematically illustrates a rear view of a motor vehicle body closed by a trunk door P on which has been

  mounted a lock control device by means of a button-

  pusher designated by the reference 1 as a whole.

  The push button 1 better represented in FIGS. 3 and 4 is mounted in mobility in a guide box 2 provided with an immobilizing flange 3 screwed on the outer panel 4 of the trunk door 10. The panel 4 is

  covered by the support 5 with a license plate not shown.

  The aforementioned device is applied, by way of nonlimiting example, to a lock control in which an electric actuator 20 ensures the operation of a return lever 18 articulated on the guide box 2 and

  to which is attached a rod 19 for controlling the lock 13.

  An actuating barrel 6 has conventionally a plurality of locking flakes 7 in contact with a fixed stator 8, the disengagement of which is effected by means of a key. The barrel 6 is extended axially by a tilting finger 9 at the end of which is mounted a

rotary control rod 10.

  This extends axially in the direction of an actuating lever 11 at two different stable positions which actuates the mechanism of the lock 13 of the trunk door P. The control rod 10 extends axially inside of a guide

sliding 12.

  -4- Two springs 14 are mounted in compression between one face of the guide

  slide 12 and the bottom wall of the fixed guide box 3.

  The choice of the setting of the springs 24 can be as low as possible in order to allow the push button to be operated with effort.

significantly more reduced.

  According to the first embodiment of the invention shown in Figure 4, the stopper 15 is carried by the actuating lever 11 and cooperates with a tilting hook 16 with inertia effect and elastic return. The hook 16 is articulated around an axis 17 carried by the immobilizing flange 3 associated with the guide box. A return spring, not shown, connects the hook to the guide box 3 in order to prevent the hook from tilting in the push-button locking position due to the

only action of its weight.

  Referring to Figure 5, there is shown an alternative embodiment of the device according to the invention, according to which the push button carries a receiving cavity of the tilting hook 16, while the stop 15 is integrated into a closure wall of the guide box 2 and of the push button housing 1. A return spring can likewise be arranged between the hook 16 and the guide box 2 in order to bring said hook back into the release position of the push button, in the absence deceleration

of the vehicle.

  The hook 16 has been shown in each FIG. 4 and 5 according to a position for releasing the push button shown in strong lines and a position for

  blocking of the push button shown in phantom.

  The following description will explain the operation of the device

  according to the invention with reference to Figures 4 and 6. The hook is shown

  in the push-button locking position 1.

  When the vehicle is traveling at constant speed, the hook 16 is only subjected to its weight, the reaction of the axle 17 on the hook 16 and the action of the return spring acting against the tilting moment the weight of the hook. The hook 16 occupies a position as shown

49M 1,161

  -5- in a strong line in Figure 4 for which the hook does not oppose the

moving the push button 1.

  The center of gravity G of the hook 16 is vertically offset by a distance 1 upwards relative to its pivot axis 17 carried by the

guide box 2.

  When the deceleration to which the vehicle is subjected exceeds a fixed value, the oriented axis X being directed towards the front of the vehicle, the hook 16 pivots around the axis 17 by a determined angle depending in particular on the setting of the spring of recall of the hook, of the weight of said hook and of the component along the axis X of the deceleration, the free end of the hook 16 comes into contact with the stopper 15 carried by the actuating lever 11 and opposes excessive movement of the push button 1 beyond a position causing the actuation of the lock mechanism 13 of the door P of the trunk and therefore the opening of the latter. The value of the stiffness of the springs 14 must be chosen by a person skilled in the art together with the parameters mentioned above so that the blocking of the push button by the hook 16 occurs before said push button has reached a actuation position of the

door lock P for the trunk.

-6-

Claims (4)

  1) Push button control device for a boot door lock, which includes a fixed guide box (2) for the push button (1) carrying an operating assembly (6, 7, 8) d '' an actuating lever (11) of a lock mechanism, characterized in that it includes a stop (15) of a tilting hook   (16) with inertia effect and elastic return to block the button-   pusher whose movement towards the stopper is   subject to vehicle deceleration.   2) control device according to claim 1, characterized in that the center of gravity of the tilting hook (16) and the axis of   tilting (17) of said hook are vertically offset.   3) Control device according to claim 2, characterized in that the pivot axis of the hook (16) is integral with an immobilizing flange (3) of the guide box (2) on a wall of the trunk of the vehicle, and that the bottom wall of said guide housing (2) constitutes the support of the return springs (14) of a sliding guide   (12) of the push button (1) in the direction of said push button.   4) Control device according to claim 3, characterized in that the stopper (15) of the tilting hook (16) articulated on the guide housing (2) of the push button is carried by the lever   actuation (11) of the lock mechanism.   ) Control device according to any one of claims 1   or 2, characterized in that the stopper (15) of the tilting hook (16) articulated on the push-button (1) is carried by the   guide box (2) of said push button.