FR3034723A1 - REAR BENCH LOCK DEVICE - Google Patents

Abstract

The invention relates to a locking device (40) for a folding seat back (14) of a motor vehicle, comprising: a support; a latch (43) comprising at least one bolt (44) mounted on the support and a striker (46), the bolt cooperating with the striker when the backrest is in the locked configuration, the bolt being disengaged from the striker when the backrest is in position; unlocked configuration; a control mechanism (64) operable by a user; and an intermediate bolt actuating member (54) operable by the control mechanism, the intermediate actuating member being in contact with the latch upon passage from the latched configuration to the unlocked configuration, and no longer being in contact with the lock when the folder is folded down.

Description

B13769 - 3496 1.EN 1 REAR BODY LOCKING DEVICE Domain The present application relates to a device for locking a seat back or rear seat of a motor vehicle and a vehicle comprising such a device.

DESCRIPTION OF THE PRIOR ART FIG. 1 is a partial and schematic representation of a rear seat 10 of a motor vehicle 5 comprising a seat 12 and a backrest 14, which can be lowered in order to increase the volume of the boot at the back, for example by rotation about a pivot 16. The backrest 14 may be in one part or, as shown in Figure 1, in several parts 18 and 20 each being foldable separately. It may be desirable to be able to fold down the backrests 18, 20 of the seat 10, in particular to temporarily increase the capacity of the luggage compartment of the vehicle 5. For this purpose, each backrest 18, 20 is held in the body 24 of the vehicle 5 by a locking device 22 which can be actuated by a user to release the file 18, 20 in order to be able to fold it down. Only the locking device 22 associated with the backrest 18 can be seen in FIG. 1. The locking device 22 must make it possible to hold the backrest 18, 20 in position against the body 24 of the vehicle 5 to prevent it from becoming blocked. .GB 2 fold down on the passengers in case of shock of the vehicle, in particular under the effect of the luggage of the safe which come crashing the file. By way of example, the locking device 22 comprises a striker 26 in the form of a projection mounted integral with the body 24. The locking device 22 further comprises a bolt 28 cooperating with the striker 26 in the locked position . The locking device 22 comprises a control mechanism 30 which makes it possible to move the bolt 28 to disengage it from the striker 26, that is to say from the box 24, and thus to fold the backrest 14 towards the The control mechanism 30 is operable by a user and generally comprises a handle or lever on the backrest of the seat 10. It would be desirable to provide an additional control mechanism remote from the backrest 14, for example located in the seat. trunk of the vehicle 5, to allow a user to unlock the folder 14 of the body 24 without having to access the folder 14. SUMMARY An object of an embodiment is to overcome all or part of the disadvantages of the locking devices described above. a seat back or rear seat of a motor vehicle operable by a control mechanism. Another object of an embodiment is that the control mechanism is remote from the backrest, particularly in the trunk of the vehicle. Another object of an embodiment is that the remote control mechanism has a simple structure. Another object of an embodiment is that the remote control mechanism can easily be adapted to an already existing locking device comprising a latch integrated in the backrest and a strike fixed to the vehicle body. Another object of one embodiment is that the mounting method of the locking device including the remote control mechanism is simple. Thus, an embodiment provides a device for locking a folding seat back of a motor vehicle, comprising: a support; A latch comprising at least one bolt mounted on the support and a striker, the bolt cooperating with the striker when the backrest is in the locked configuration, the bolt being disengaged from the striker when the backrest is in the unlocked configuration; A user operable control mechanism; and an intermediate latch operating member operable by the control mechanism, the intermediate actuating member being in contact with the latch upon passage from the latched configuration to the unlocked configuration, and no longer in contact with the latch with the lock when the folder is folded down. According to one embodiment, the lock further comprises a first lever pivotally mounted on the support, connected to the bolt and adapted to control the bolt during the transition from the locked configuration to the unlocked configuration. According to one embodiment, the intermediate actuating member comprises a second lever pivotable and operable by the control mechanism.

According to one embodiment, the intermediate actuating member is in direct contact with the first lever during the transition from the locked configuration to the unlocked configuration. According to one embodiment, the locking device further comprises a third lever pivotally mounted on the support, the intermediate actuating member being adapted to actuate the first lever via the third lever during the passage of the locked configuration to the unlocked configuration.

According to one embodiment, the locking device further comprises a member movably mounted in translation relative to the support, the intermediate actuating member being adapted to actuate the first lever by means of through the element when switching from the locked configuration to the unlocked configuration. According to one embodiment, the intermediate actuating member is connected to the control mechanism by a cable. An embodiment also provides an automotive vehicle having the aforementioned locking device. According to one embodiment, the support is fixed to the backrest frame and the strike is fixed to the vehicle body. According to one embodiment, the intermediate actuating member and the control mechanism are mounted in the trunk of the vehicle. According to one embodiment, the intermediate actuating member is pivotally mounted on the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS These and other features and advantages will be set forth in detail in the following description of particular embodiments in a non-limiting manner with reference to the accompanying drawings, in which: FIG. is a diagrammatic and partially cut-away perspective view of an example of a folding rear seat of a motor vehicle; FIGS. 2A and 2B are sectional side views, partial and schematic, of an embodiment of a locking device with two operating positions; Figures aA and 3B are partial sectional and schematic side views of another embodiment of a locking device with two operating positions; and Figs. 4A and 4B are partially sectioned, partial and schematic side views of another embodiment of a two-position locking device.

3034723 B13769 - 3496 1.EN 5 Detailed description The same elements have been designated with the same references in the various figures and, in addition, the various figures are not drawn to scale. For the sake of clarity, only the elements which are useful for understanding the described embodiments have been shown and are detailed. In the following description, when reference is made to absolute position qualifiers, such as the terms "forward", "backward", "up", "down", "left", "right", etc. , or relative, such as the terms "above", "below", "upper", "lower", etc., or with qualifiers for orientation, such as the terms "horizontal", "vertical", etc., reference is made to the orientation of the figures or to a motor vehicle seat in a normal position of use.

Unless otherwise stated, the terms "approximately", "substantially", and "of the order of" mean within 10%, preferably within 5%. Embodiments of a locking device of a folding backrest of a motor vehicle rear seat 20 will be described. However, it is clear that these embodiments also apply to a vehicle rear seat comprising one or more separate seats. Likewise, the backrest may be single or in the form of a plurality of separate elements and whose position may be independently modified. In addition, the embodiments described below apply to all types of folding folders, regardless of the movement followed by the folder during a folding operation, this movement may be a simple rotation or be a movement compound.

Figs. 2A and 2B show an embodiment of a latch 40 respectively in a locked position and in an unlocked position. The locking device 40 may be used in place of the locking device 10 shown in FIG. 1. In FIGS. 2A and 2B, the elements of the locking device 40 which are situated entirely on the left-hand side of the line in phantom lines 42 and, in particular, move with the folder 14 when folded. In FIGS. 2A and 2B, the elements of the locking device 40 which are situated wholly or partly to the right of the dashed line 42 do not form part of the backrest 14 of the vehicle seat and are connected to the body 24. of the vehicle. In particular, these elements do not move with the folder 14 when folded. In FIGS. 2A and 2B, the upper edge of the backrest is represented by a part 41 fastened to the backrest frame 14. The locking device 40 comprises a lock 43 comprising a catch mechanism 44 adapted to cooperate with a latch 46 fixed relative to the body 24 of the vehicle. The present embodiment is described in the case of a hooking mechanism 44 comprising a bolt having the fo = a hook, pivotally mounted relative to the armature, not shown, of the backrest 14 around a axis Dl. However, it is clear that the present embodiment can be shaped with other types of attachment mechanisms, including a hook mechanism 20 comprising two hook-shaped bolts, an example of which is described later. The keeper 46 corresponds, for example, to a projecting rod fixed to the body 24. In the locked position shown in FIG. 2A, the bolt 44 cooperates with the striker 46 so that the backrest 14 is fixed to the body 24 of the vehicle. . In the unlocked position shown in FIG. 2B, the bolt 44 does not cooperate with the striker 46 so that the backrest 14 can be folded down. The latch 43 comprises an actuating mechanism, mounted on the backrest 14, comprising a first lever 48 pivotally mounted relative to the backrest frame about an axis D2, parallel to D1. The first lever 48 comprises a portion 50 accessible to a user, for example from the upper end of the backrest through an opening 51 provided in the part 41. The first lever 48 is connected to the bolt 44 by a connecting rod 52, one of which 35 end is rotatably mounted on the first lever 48 around 3034723 B13769 - 3496 1.FR 7 of an axis D3, parallel to D1, and whose other end is rotatably mounted on the bolt 44 about an axis D4 , parallel to Dl. A return mechanism, not shown, may be provided to hold the latch 44 in the locked position in the absence of action by a user. The locking device 40 further comprises a second lever 54 pivotally mounted about the axis D5 relative to the body 24 of the vehicle. The second lever 54 comprises a first branch 56 and a second branch 58. The first branch 56 is connected to one end of a cable 60 contained in a sheath 62. The other end of the cable 60 is connected to a control mechanism remote 64, comprising for example a base 65 fixed to the body 24 of the vehicle and a pull tab 66, actuatable by the user, and pivotally mounted relative to the base 65. The first lever 48 comprises an arm 68 with which the second leg 58 is adapted to cooperate during a pivoting of the second lever 54. In the present embodiment, the axis D5 is substantially parallel to Dl. However, the axis D5 can be inclined with respect to D1 as long as the second leg 58 cooperates with the arm 68 during a pivoting of the second lever 54. In the position shown in FIG. 2A, the second lever 54 is in abutment Against a stop 69. A return mechanism, not shown, may be provided to hold the second lever 54 against the stop 69 in the absence of action by a user on the remote control mechanism 64. remote control 64 may be arranged at a distance from the second lever 54. Preferably, the cable 60 is sufficiently long, for example of the order of at least 50 cm, so that the remote control mechanism 64 can be placed at proximity 30 of the trunk opening to facilitate its actuation. When a user actuates the remote control mechanism 64, traction is exerted on the cable 60, causing the second lever 54 to pivot about the axis D5 in a clockwise direction from the position shown at 35. Figure 2A to the position shown in Figure 2B. During pivoting, the second leg 58 of the second lever 54 cooperates with the arm 68 of the first lever 48 causing the pivoting of the first lever 48 in a rotational movement about the axis D2 in the clockwise from the position 5 shown in Figure 2A to the position shown in Figure 2B. The pivoting of the first lever 48 drives, via the connecting rod 52, the pivoting of the bolt 44 in a rotational movement around the axis D1 in the clockwise direction from the locked position shown in FIG. 2A to the unlocked position shown in Figure 2B. All that is required is a simple pressure on the backrest 14 to fold it down. Alternatively, means may be provided to initiate the folding movement of the backrest 14. The user can then release the remote control mechanism 64. When the user returns the backrest 14 in the upright position, the bolt 44 can cooperate with the striker 46 by exerting a simple pressure on the backrest 14. A user can also rotate the control mechanism 48 linked to the backrest 14, by an action on the accessible portion 50, in a rotational movement around the axis D2 clockwise from the position shown in Figure 2A to the position shown in Figure 2B causing the pivoting of the bolt 44 to the unlocked position shown in Figure 2B, as indicated 25 previously. However, in this case, the second lever 58 remains in the position shown in FIG. 2A. Figures aA and 3B show another embodiment of a latch 70 respectively in a locked position and in an unlocked position in opposite viewing directions. The locking device 70 comprises all the elements of the locking device 40 with the difference that the second lever 54 does not cooperate directly with the first lever 48, but is adapted to cooperate with an element 72 mounted to be movable in translation relative to 35 the frame of the file. In FIGS. AA and 3B, the part 41 forms a guide 74 for the displacement of the mobile element 72. The mobile element 72 comprises an end 75 adapted to cooperate with the first lever 48. In Figures aA and 3B, the remote control mechanism 64 is not shown.

In the present embodiment, the attachment mechanism 44 comprises two bolts 76, 78. The bolt 76 is pivotally mounted relative to the backrest frame 14 about the axis D1 and the bolt 76 is pivotally mounted by relative to the frame of the backrest 14 around the axis Dl ', parallel to Dl. In the locked position shown in Figure aA, the striker 46 is held between the two bolts 76, 78 and the bolt 78 blocks the rotation of the bolt 76 so that the backrest 14 is fixed to the body 24 of the vehicle. In the unlocked position shown in FIG. 3B, the bolt 78 does not cooperate with the bolt 76 which has pivoted around the axis D1 so that the striker 46 is no longer held by the attachment mechanism 44. In this embodiment, the first lever 48 is adapted to cooperate directly with the bolt 76 via an arm 80 adapted to cooperate with a lug 82 of the bolt 76 when the first lever 48 pivots about the axis D2 clockwise in Figures 4A and 4B. The third lever 72 further comprises a second portion 76 adapted to cooperate with the arm 68 of the first lever 48 when the third lever 72 pivots about the axis D6 clockwise in FIGS. 4A. and 4B. When a user actuates the remote control mechanism 64, traction is exerted on the cable 60, causing the second lever 54 to pivot about the axis D5. The pivoting of the second lever 54 causes the movable member 72 to move. The displacement of the movable member 72 causes the first lever 48 to pivot about the axis D2, causing the bolt 76 to pivot about the axis. Dl 'and the release of the bolt 76. Just then a simple pressure on the folder 14 to fold down. When the user returns the backrest 14 to the upright position, the bolts 76 and 78 can come into contact with the striker 46 by exerting a simple pressure on the backrest 14. A user can also rotate the backrest 14. control mechanism 48 linked to the backrest 14, by an action on the accessible portion 50.

FIGS. 4A and 4B show another embodiment of a locking device 90 in a locked position and in an unlocked position respectively. The locking device 90 comprises all the elements of the locking device 40 with the difference that the second lever 54 is not adapted to cooperate directly with the first lever 48 but cooperates with a third lever 92 pivotally mounted around the an axis D6 relative to the frame of the file. The third lever 92 comprises a first portion 94 adapted to cooperate with the second leg 58 of the second lever 54 when the second lever 54 pivots about the axis D5 in a clockwise direction in FIGS. 4A and 4B. The third lever 92 further comprises a second portion 96 adapted to cooperate with the arm 68 of the first lever 48 when the third lever 92 pivots about the axis D6 in a clockwise direction in FIGS. 4A. and 4B. When a user actuates the remote control mechanism 64, traction is exerted on the cable 60, causing the second lever 54 to pivot about the axis D5 in a clockwise direction from the position shown at 25. Figure 4A to the position shown in Figure 4B. During pivoting, the second leg 58 of the second lever 54 cooperates with the first portion 94 of the third lever 92 causing the pivoting of the third lever 92 in a rotational movement about the axis D6 in the direction of clockwise from the position shown in Figure 4A to the position shown in Figure 4B. During pivoting, the second portion 96 of the third lever 92 cooperates with the arm 68 of the first lever 48 causing the pivoting of the first lever 48 in a rotational movement about the axis D2 in a clockwise direction. from the position shown in FIG. 4A to the position shown in FIG. 4B. As previously described for the locking device 40, the pivoting of the first lever 48 causes the latch 44 to pivot in a rotational movement about the axis D1 in the clockwise direction from the locked position. shown in Figure 4A to the unlocked position shown in Figure 4B. The backrest 14 of the seat can then be folded down and the user can release the remote control mechanism 64. When the user returns the backrest 14 in the upright position, the bolt 44 can come to cooperate with the striker 46 by exerting a simple 14. A user can also rotate the first lever 48, by action on the accessible portion 50, in a rotational movement about the axis D2 clockwise from the position. shown in Figure 4A to the position shown in Figure 4B causing the pivoting of the bolt 44 to the unlocked position shown in Figure 4B, as previously indicated. However, in this case, the second lever 58 remains in the position shown in FIG. 4A. An advantage of the embodiments of the locking devices 40, 70 and 90 described above is that the control mechanism 64 can be arranged at a distance from the back 14 of the seat. In particular, the remote control mechanism 64 may advantageously be disposed in the trunk of the vehicle, preferably at the wheels, or even further back. This allows in particular to fold the folder directly from the trunk of the vehicle. In the embodiments of the locking device 40 and 70, the second lever 54 is disposed above the striker 46 while in the embodiment of the locking device 90, the second lever 54 is disposed below the striker 46. It is thus possible to arrange the second lever 54 at any height relative to the striker 46 to take account of the space requirements of the body.

3034723 B13769 - 3496 1.EN 12 Particular embodiments have been described. Various variations and modifications will be apparent to those skilled in the art. In particular, the fo = first, second and third levers 54, 48 and 92 may be different from that shown in the figures. In addition, although in the embodiments described above the bolt 44 has the shape of a hook and cooperates with the keeper 46 by a rotational movement, it is clear that the fo = of the bolt and the movement of the bolt 44 by report to the striker 46 may be different.

Claims (11)

REVENDICATIONS1. Device for locking (40; 70; 90) a folding seat back (14) of a motor vehicle, comprising: a support; a latch (43) comprising at least one bolt (44; 76; 78) mounted on the support and a striker (46), the bolt cooperating with the striker when the backrest is in the locked configuration, the bolt being disengaged from the striker when the folder is in unlocked configuration; a control mechanism (64) operable by a user; and an intermediate bolt actuating member (54) operable by the control mechanism, the intermediate actuating member being in contact with the latch upon passage from the latched configuration to the unlocked configuration, and no longer being in contact with the lock when the folder is folded down. 2. Locking device according to claim 1, wherein the latch (43) further comprises a first lever (48) pivotally mounted on the support, connected to the bolt (44) and adapted to control the bolt during the passage of the locked configuration to the unlocked configuration. Locking device according to claim 2, wherein the intermediate actuating member (54) comprises a second lever (54) pivotable and operable by the control mechanism (64). The locking device according to claim 2 or 3, wherein the intermediate actuating member (54) is in direct contact with the first lever upon transition from the latched configuration to the unlocked configuration. Locking device according to claim 2 or 3, further comprising a third lever (92) pivotally mounted on the support, the intermediate actuating member (54) being adapted to actuate the first lever (48) by 3034723 B13769 - 3496 1.EN 14 via the third lever when changing from the locked configuration to the unlocked configuration. 6. A locking device according to claim 2 or 3, further comprising a member (72) movably translatable relative to the support, the intermediate actuating member (54) being adapted to actuate the first lever ( 48) through the element when switching from the locked configuration to the unlocked configuration. Locking device according to any one of claims 1 to 6, wherein the intermediate actuating member (54) is connected to the control mechanism (64) by a cable (60). 8. A motor vehicle having the locking device (40; 70; 90) according to claims 1 to 7. 15 9. Motor vehicle according to claim 8, wherein the support is fixed to the frame of the backrest (14) and the latch (46) is fixed to the body (24) of the vehicle. 10. Motor vehicle according to claim 8 or 9, wherein the intermediate actuating member (54) and the control mechanism (64) are mounted in the trunk of the vehicle. 11. Motor vehicle according to any one of claims 8 to 10, wherein the intermediate actuating member (54) is pivotally mounted on the body (24) of the vehicle.