CN117698524A - Connection device for a motor vehicle seat comprising an anti-rotation mechanism - Google Patents
Connection device for a motor vehicle seat comprising an anti-rotation mechanism Download PDFInfo
- Publication number
- CN117698524A CN117698524A CN202311047958.1A CN202311047958A CN117698524A CN 117698524 A CN117698524 A CN 117698524A CN 202311047958 A CN202311047958 A CN 202311047958A CN 117698524 A CN117698524 A CN 117698524A
- Authority
- CN
- China
- Prior art keywords
- locking
- locking element
- flange
- seat
- cam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 82
- 230000005540 biological transmission Effects 0.000 claims description 25
- 210000000078 claw Anatomy 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
- B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
- B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
- B60N2/2352—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with external pawls
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Seats For Vehicles (AREA)
Abstract
A connection device (10) for the inclination adjustment and rapid folding of the backrest of a seat with respect to the seat cushion, comprising: -at least one inclination adjustment mechanism (20), comprising a first flange (21) and a second flange (22) rotatably mounted to form a connection, comprising a system for adjusting the relative position of the first flange (21) with respect to the second flange (22), the first flange (21) being rotatable about a first rotation axis (X1) with respect to the second flange (22) fixed to the seat cushion (11), -a quick folding mechanism (100) configured to fold the backrest onto the seat cushion without changing the relative position between the first flange (21) and the second flange (22).
Description
The present disclosure relates to a connection device configured for tilt adjustment and quick folding of a backrest of a seat relative to a seat cushion, and a seat comprising such a device.
Technical Field
The present disclosure relates to the field of connection mechanisms for motor vehicle seats.
In particular, the present disclosure relates to a connection mechanism of a motor vehicle seat comprising an anti-rotation mechanism, and to a motor vehicle seat comprising such a mechanism.
Prior Art
Motor vehicle seats generally comprise a seat cushion and a backrest, the inclination of which with respect to the seat cushion is adjustable by means of an inclination adjustment mechanism. In particular in the case of three-door vehicles, that is to say if there are no special doors to access the rear seats of the vehicle, these seats are accessed directly through the front door of the vehicle. The seat is equipped with a quick fold mechanism configured to fold the back onto the seat cushion to provide as wide access to the rear seat as possible. The seat is then returned to the normal use position and the inclination adjustment before quick folding is stored in a memory.
If the seat back is subjected to an abnormal force, the seat back may fold in an improper manner. To overcome this drawback, document FR3004393B1, published in the name of the applicant, discloses an anti-reverse mechanism capable of locking a quick folding mechanism. However, it has been observed that such a mechanism may be unstable in operation, resulting in an accidental unlocking of the quick-folding mechanism, which prevents the backrest from being folded in time, in particular when subjected to impacts, the mechanism being subjected to discontinuous forces.
In fact, according to the results of the inventors' studies, in the prior art mechanisms, instability is caused if strong vibrations occur, or the seat is subjected to impacts, which can cause slight tightening of the drive cable associated with the handle provided on the seat back, which can be operated to rapidly fold the seat back onto the seat cushion, resulting in a locking cam movement of the rapid folding mechanism, resulting in untimely folding, or in said cam movement, but without tightening of the drive cable.
The object of the present disclosure is to enhance the efficacy of anti-reverse devices, in particular to overcome the above drawbacks.
Disclosure of Invention
To this end, a connection mechanism for changing the inclination of the backrest of a seat with respect to the seat cushion is disclosed, comprising:
at least one inclination adjustment mechanism connecting the seat cushion and the backrest, in particular a first adjustment mechanism connecting a first side of the seat and a second adjustment mechanism connecting a second side of the seat, the at least one inclination adjustment mechanism comprising a first flange and a second flange rotatably mounted to each other to form a connection, comprising a system for adjusting the relative position of the first flange with respect to the second flange, the first flange being rotatable about a first rotation axis (X1) with respect to the second flange fixed to the seat cushion,
a quick-fold mechanism configured for folding the backrest onto the seat cushion without changing the relative position between the first flange and the second flange, in particular between the first flange and the second flange of the inclination adjustment mechanism of only one side of the seat, or even between the first flange and the second flange of the first adjustment mechanism of the first side of the seat and between the first flange and the second flange of the second adjustment mechanism of the second side of the seat, while storing in a memory an adjustment of the inclination of the backrest with respect to the seat cushion, the quick-fold mechanism comprising at least one locking/unlocking means and means for controlling said locking/unlocking means,
the locking/unlocking device includes:
a first locking element fixed to the first flange, and a second locking element fixed to the frame, the second locking element being mounted on the back frame in a manner movable between a first position in which the second locking element cooperates with the first locking element to prevent relative rotation between the frame and the first flange, and a second position in which the second locking element allows relative rotation between the frame and the first flange,
a locking cam rotatably mounted about a second axis of rotation parallel to the first axis of rotation between an active position, in which the locking cam is restrained in place by the spring element and retains the second locking element in the first position, and an inactive position, in which the locking cam is separated from the second locking element, whereby the locking cam is configured to move the second locking element from the first position to the second position,
the control device includes a transmission and a control member controlled by the transmission, the control member being pivotally mounted and fixed to the locking cam about a second axis of rotation and configured to allow the locking cam to rotate about the second axis of rotation between a locked position in which the control member holds the locking cam in the active position and an unlocked position in which the control member moves the locking cam to the inactive position when the transmission is pulled.
According to the present disclosure, the control part comprises a first locking element linked to the transmission and a second locking element pivotally mounted around a second rotation axis, rotationally fixed to the locking cam, the first and second locking elements being hinged to each other according to a limited travel, so that the control part is configured to allow a first relative movement travel of the first locking element relative to the second locking element from an initial position, when the transmission is pulled, the locking cam remains in an active position, and to allow a second travel of the locking cam around a second rotation axis to its inactive position, said second travel being driven at the end of the first travel.
According to one embodiment, the first stroke is an angular movement of the first locking element relative to the second locking element about a third rotation axis parallel to the first and second rotation axes.
According to one embodiment, the third rotation shaft is arranged on the locking cam and/or the second locking element.
According to one embodiment, the first locking element comprises a locking claw and the second locking element comprises a first support on which the locking claw is supported at the end of the first stroke.
According to one embodiment, the transmission is an unlocking cable attached to one end of the first locking element to pull the locking cam in order to place it in the inactive position.
According to one embodiment, the control means applies a resilient bias to an initial position of the first locking element relative to the second locking element by means of a first resilient return element connecting the first locking element and the second locking element.
According to one embodiment, the control member is resiliently biased to the locking position by a second resilient return element connecting the second locking member to the frame to return the second locking member to its locking position.
According to one embodiment, the control means are arranged to interfere with the second support carried on the frame by locking the locking cam in its operating position when the first locking element is in an initial position with respect to the second locking element, and to not interfere with the second support in the locked position. In particular, the first locking element comprises a counter-support provided to interfere with the second support when the first locking element is in an initial position with respect to the second locking element, thereby locking the locking cam in its working position.
The present disclosure also relates to a vehicle seat comprising a seat cushion and a backrest, the backrest being connected to the seat cushion by means of the device according to the present disclosure.
Drawings
Other features, details and advantages will be apparent from a reading of the following detailed description and a review of the accompanying drawings.
Fig. 1 shows a schematic view of a vehicle seat equipped with a connection mechanism according to the invention.
Fig. 2 shows a schematic view of a vehicle seat back equipped with a connection mechanism according to a first embodiment of the invention.
Fig. 3 shows a schematic view of a vehicle seat back equipped with a connection mechanism according to a second embodiment of the invention.
Fig. 4 shows a front view of an example of a connection mechanism with a locking/unlocking device in a first position, the means for controlling the locking/unlocking device being in a locking position of a locking cam.
Fig. 5 shows a rear view of the connection mechanism of fig. 4.
Fig. 6 shows a front view of an example of the connection mechanism of fig. 4, with the locking/unlocking means in a first position, and with the means for controlling the locking/unlocking means in an unlocked position of the locking cam.
Fig. 7 shows a rear view of the connection mechanism of fig. 6.
Fig. 8 shows a front view of an example of the connection mechanism of fig. 4 and 6, with the locking/unlocking means in a second position and the means for controlling the locking/unlocking means in an unlocked position of the locking cam.
Fig. 9 shows a rear view of the connection mechanism of fig. 6.
Detailed Description
The present disclosure relates in particular to a vehicle seat 13 comprising a seat cushion 11 mounted on a vehicle floor and a backrest 12 pivoted relative to the seat cushion about a first axis of rotation X1, as indicated by the reference numeral in fig. 1. The inclination of the seat cushion 11 can be adjusted, for example, by actuating a control device, in particular a manual control device such as a handle 15, and the backrest 12 can be folded down in the forward direction in a so-called "snap-fold" movement by actuating a lever 16, for example, located at the upper part of the backrest 12. The adjustment of this inclination and the rapid folding are achieved by means of the device 10 for adjustment of the inclination of the backrest of the seat with respect to the seat cushion, which can be seen by way of non-limiting example, in particular in fig. 4-8 and 5-9.
As can be seen in fig. 4-8, the device 10 generally comprises at least one inclination adjustment mechanism 20 comprising a first flange 21 and a second flange 22 rotatably mounted with respect to each other, forming a connection around a first rotation axis X1, and comprising a system 23 for adjusting the position of the first flange 21 with respect to the second flange 22. The first flange 21 pivots relative to the second flange 22, and the second flange 22 is fixed to the seat cushion 11 about the first rotation axis X1.
The adjustment system 23 is configured to allow adjustment of the inclination of the backrest by different relative positions of the first flange 21 with respect to the second flange 22. The adjustment system 23 may be continuous, typically employing hypocycloidal gears as described in document WO2003043847A1, allowing an unlimited number of adjustment positions between the first flange and the second flange.
It may also be a discontinuous mechanism, typically with teeth as described in document EP0502774A1, allowing a limited number of adjustment positions between the first flange 21 and the second flange 22, the increment of angular adjustment being typically less than 5 °, or even less than 2 °, or even less than 1 °.
The apparatus 10 may comprise two mechanisms 20 arranged mirror-image of each other at the connection between the two sides of the seat frame, the two sides of the seat, the seat cushion and the backrest, on the one hand a first inclination adjustment mechanism, indicated with reference numeral 20a in figures 2 and 3, connects the first upright 14a of the frame 14 to the seat cushion, in particular the frame of the seat cushion, on the other hand a second inclination adjustment mechanism, indicated with reference numeral 20a in figures 2 and 3, connects the second upright 14a of the frame 14 to the seat cushion, in particular the frame of the seat cushion.
Each of the adjustment mechanisms, i.e. the first inclination adjustment mechanism 20a and the second inclination adjustment mechanism 20b, may comprise an input member which, when rotated by the manual control means, may change the adjustment of the inclination as the position of the first flange 21 relative to the second flange 22 changes. The input member of the first inclination adjustment mechanism 20a and the input member of the second inclination adjustment mechanism 20b on the seat side can be driven generally simultaneously by a control shaft 18 which is usually actuated by a manual control means such as a handle 15.
The apparatus 10 further includes a quick fold mechanism 100 for folding the back 12 onto the seat cushion 11 while storing in memory the adjustment of the inclination of the back 12 relative to the seat cushion 11. Thus, before and after folding the backrest 12, the inclination of the backrest 12 remains uniform, folding being achieved without changing the relative position between the first flange 21 and the second flange 22 of the inclination adjustment mechanism, in particular according to the first embodiment (illustrated in fig. 2) folding being achieved only on one side of the seat, or according to the second embodiment (illustrated in fig. 3), even without changing the relative position between the first flange 21 and the second flange 22 of the first inclination adjustment mechanism on the one hand, and the relative position between the first flange 21 and the second flange 22 of the second inclination adjustment mechanism on the other hand.
To this end, the quick folding mechanism 100 comprises at least one locking/unlocking device 30 (fig. 4-8) and a control member 51 (fig. 2-9) of said locking/unlocking device 30.
According to the first embodiment, the locking/unlocking means 30 and the control member are associated with only one side of the seat, and folding of the backrest is achieved only on this side of the seat without changing the relative position between the first flange 21 and the second flange 22 of the reclining mechanism 20 a. The first flange 21 is then not fixed directly to the frame, but only by means of the locking/unlocking means 30. The reclining mechanism 20b on the other side of the seat may include a first flange 20 directly attached to the frame and a second flange 21 attached to the seat cushion.
According to the first embodiment, the quick folding of the seat is achieved by unlocking the locking/unlocking means 30 on one side of the seat without changing the relative position between the first flange 21 and the second flange 22 of the seat side tilt adjustment mechanism 20a, and by unlocking the tilt adjustment mechanism 20b on the other side of the seat, thereby changing the relative position between the first flange 21 and the second flange 22 on the other side of the seat.
According to the second embodiment, the first locking/unlocking device 30 and the first control member 51 are associated with the first inclination adjustment mechanism 20a, and the second locking/unlocking device 30 and the second control member 51 are associated with the second inclination adjustment mechanism 20 b.
On the one hand, folding of the backrest is achieved without changing the relative position between the first flange 21 and the second flange 22 of the first inclination adjustment mechanism, and on the other hand, folding of the backrest is achieved without changing the relative position between the first flange 21 and the second flange 22 of the second inclination adjustment mechanism, the first locking/unlocking means and the second locking/unlocking means can be provided.
The at least one locking/unlocking means 30 is arranged on at least one side of the seat, even on both sides of the seat. It comprises a first locking element 31 fixed to the first flange 21 and a second locking element 32 fixed to the frame 14. The second locking element 31 is movably mounted on the back frame between a first position (fig. 4 and 6) in which the second locking element 32 cooperates with the first locking element 31, for example by complementary splines, to prevent relative rotation between the frame 14 and the first flange 21, and a second position (fig. 8) in which the second locking element 32 allows relative rotation between the frame 14 and the first flange 21.
In the first position, the complementary splined engagement between the first locking element 31 and the second locking element 32 secures the first flange 41 to the frame, while in the second position, the engagement between the splines of the first and second elements is eliminated, releasing the relative rotation between the frame 14 and the first flange 41.
The at least one locking/unlocking means 30 further comprises a locking cam 40. The locking cam 40 is rotatably mounted between an operative position (fig. 4 and 6) and an inoperative position (fig. 8) about a second axis of rotation X2 parallel to the first axis of rotation X1. In the operating position, the locking cam 40 is constrained by a spring element 41, for example a torsion spring, in particular a spiral, and secures the second locking element 32 in the first position. In the rest position, the locking cam 40 is disengaged from the second locking element 32, the locking cam 40 being configured to move the second locking element 32 from the first position to the second position. In fig. 8 and in general, it may be noted that the locking cam 40 has rotated the second locking element from the first position of the second locking element 32 to the second position of the second locking element 32.
The control device is shown in fig. 2, 3, 5, 7 and 9. Which is provided for controlling the locking/unlocking means 30 and which for this purpose comprises a transmission 60 and said control member 51 controlled by the transmission. For example, the transmission 60 may be an unlocking cable attached to one end of the control member 51 to pull the locking cam 40 to be in the rest position. The control member 51 is pivotally mounted about the second rotation axis X2. The control member 51 is further secured to the locking cam 40, for example by a self-locking fastener on the axis X2, so that when the control member 51 is rotated about the second axis of rotation X2, the locking cam 40 is also rotated about the same axis of rotation X2 and vice versa. In particular, the locking cam 40 may comprise a shaft protruding from its main surface and passing through the frame 14 through an opening provided for this purpose, the shaft carrying the second rotation axis X2. The control member 51 is movable about this second rotation axis X2 between a locking position, in which the control device holds the locking cam 40 in the active position, and an unlocking position, in which the control device allows the locking cam 40 to move from its active position to its inactive position when the transmission 60 is pulled.
As shown in fig. 5, 7 and 9, according to the present disclosure, the control part 51 includes a first locking element 511 and a second locking element 512. The first locking element 511 and the second locking element 512 are hingedly connected to each other, thus forming two separate parts, which are movable relative to each other. As will be described in detail below, pulling the transmission 60 rotates the first locking element 511 along the first stroke C1. Then, at the end of the first stroke C1 (fig. 7), the second locking element 512 also rotates about the second axis X2 along the second stroke C2 (fig. 9), thereby rotating the locking cam 40 from its active position to its inactive position. Thus, the locking cam 40 is divided into two phases from its operative position to its inoperative position: a first phase corresponding to the first stroke C1 and a second phase corresponding to the second stroke C2.
Since the lock cam 40 is maintained at the operating position throughout the entire period of the first stroke C1, the first stroke C1 may be referred to as a "free stroke". Such a "free" travel advantageously enables the instability problem indicated in the introduction of the present application to be solved.
Indeed, according to the results of the studies of the inventors and the mechanisms of the prior art, instability may be caused when severe vibrations occur, or due to contact between the seat environment and the cables. For example, such contact may be associated with the occupant's compression of the back cushion upon a rear impact. The vibration or shock may cause a very slight tension adjustment of the drive cable, typically less than 1 mm, resulting in an unstable balance of the cam and possibly even an imbalance, resulting in the cam sliding to the rest position shown in fig. 8, because the force of the part indicated by 32 on the cam 40 (i.e. the second locking element) causes a movement which results in an undesired unlocking and thus an untimely folding of the seat back. In accordance with the present disclosure, under similar conditions, i.e., upon vibration or impact, these vibrations (or impacts) may cause a slight tension adjustment of the transmission, but not such untimely folding, wherein the tension adjustment at most causes the first locking element 511 to rotate on a "free" stroke with respect to the second locking element 512, the cam remains in its working position, and therefore does not rotate the second locking element 512 about the second axis of rotation X2. The free travel may correspond to the distance the cable of the transmission moves, typically between 2 and 7 mm, even between 4 and 5 mm.
In the example shown in the drawings, the second locking element 512 is generally pivotable about a second axis of rotation X2. The first locking element 511 may be pivotally mounted on the second locking element 512 and/or the locking cam 40 about the third rotational axis X3. This third rotation axis X3 may be parallel to the first and second rotation axes X1, X2 and mounted on the locking cam 40, protrude from the main surface of the cam and pass through the frame 14 through the frame gap 75 so that the locking cam 40 moves between its operative and non-operative positions.
The first locking element 511 further comprises a locking pawl 53, which locking pawl 53 is provided for movement in a travel gap 76, which travel gap can be arranged in the second locking element 512. The stroke gap 76 is defined by the first support portion 54, and the lock pawl 53 is carried on the support portion 54 when the first locking member 511 rotates about the third rotation axis X3 (clockwise in the drawing). Thus, the first locking element 511 and the second locking element 512 are hinged to each other in a limited travel, whereby the control member 51 is configured to allow a first travel C1 of the relative angular movement of the first locking element 511 with respect to the second locking element 512 about the third rotation axis X3, from an initial position (fig. 5) to a first end-of-travel position (fig. 7), in which the locking pawl 53 of the first locking element is carried on the first support 54.
The angular movement of the first locking element 511 may be controlled by a transmission cable 60 attached to one end of the first locking element 511. Further, the control part 51 may apply a resilient bias to the initial position by a first resilient return element 70, such as a spring, connecting the first locking element 511 and the second locking element 512, thereby returning the control part 51 to the initial position without the transmission cable 60 being operated.
After the first stroke C1, the transmission cable 60 is pulled to rotate the second locking element 512 about the second rotation axis X2 (clockwise in fig. 9) according to a second stroke C2 corresponding to the movement of the locking cam 40 to its inactive position.
The second resilient return element 72 may connect the second locking element 512 to the frame 14 to resiliently bias the control member 51 towards the locked position by returning the second locking element 512 to its locked position in the absence of actuation of the drive cable 60. Such a second resilient return element 72 may thus increase the initial return torque provided by the spring element 41 (e.g. a coil spring).
The second resilient return element 72 is optional. The second resilient return element 72 may be a spring coupled to the frame 14 and the second locking element 512. In the case of a discontinuous connection, in particular according to the first embodiment illustrated in fig. 2, it is preferable that the second transmission cable 61 connects the second locking element 512 with the input member of the inclination adjustment mechanism 20b connected on the other side of the locking/unlocking means 30.
Pulling the first cable 60 connecting the lever 16 and the first locking element 511 drives the first stroke C1 between the first locking element 511 and the second locking element 512, and then drives the second stroke C2, which in turn:
causing the locking cam 40 to move from its active position to its inactive position, releasing the rotation of the frame 14 from this first side, and at the same time,
causing the release frame 14 to pivot from the other side by the action of the second drive cable 61 driven by the second lock 512, moving the input member of the inclination adjustment mechanism of that side from the rest position to a position separated from the input member, thereby moving the first flange 21 fixed to the frame relative to the second flange 22 fixed to the second side seat cushion, thereby releasing the possibility of pivoting the mechanism.
The return of the input member to this second side, i.e. from its disengaged position to its rest position, is normally ensured by the spring member of the inclination adjustment mechanism 20b, which thus elastically ensures the return of the input member, which in turn results in the return of the second locking member 512 by pulling the second cable 61.
The inventors have also found that in prior art mechanisms, instability can result if strong vibrations occur, even due to the seat being impacted, wherein these vibrations or impacts can cause the control member 51 and/or the locking cam 40 to rotate, thereby unlocking the mechanism. In accordance with the present disclosure, under similar conditions, that is, in the event of vibrations or impacts, these vibrations (or impacts) may cause the second locking element 512 and/or the locking cam 40 to begin rotating, but not such untimely folding, wherein the vibrations (or impacts) at best cause the rotation of the second locking element 512 without causing the first locking element 511 to rotate in advance along the first stroke C1, thereby causing the first locking element 511 to abut against the second support 55. As shown in fig. 4, 5, 6 and 7, the frame gap 75 is defined by the second support 55, preventing the rotation of the control member 51 about the second rotation axis X2 if no tensile force is applied to the transmission 60. In this case, the first locking member 511 does not pivot about the third rotation axis X3, and thus does not move along the first stroke C1. If a large abnormal force is applied to the connection mechanism forcing the control member 51 to rotate about the second axis of rotation X2, the control member 51 may start to rotate about the axis X2 but will be abutted against the second support 55 by the counter support 56 carried by the first locking element 511, thereby preventing the complete rotation of the control member 51 and the unlocking of the quick folding mechanism 100. In other words, when the first locking element 511 is in an initial position relative to the second locking element 512 (i.e. not rotating about the third axis X3), the control part 51 is arranged to interfere with the second support 55 by locking the locking cam 40 in its working position, in which the first locking element 511 deviates from the second support 55 during the first stroke C1 in case of an abnormal force acting on the connection mechanism during rotation of the control part 51 about the second axis X2.
Thus, even if the seat back is subjected to a large impact, the control means in the two locking elements lock the locking cams in the operating position. Thus, the locking/unlocking device described above addresses the potential instability of the quick fold mechanism to drive the folding of the seat back.
List of reference numerals
10: device for adjusting the inclination of the backrest of a seat relative to the seat cushion and for rapid folding
11: seat cushion
12: backrest for chair
13: chair seat
14: frame
15: handle
16: control lever
18: control shaft
20: inclination adjusting mechanism
20a: first inclination adjusting mechanism
20b: second inclination adjusting mechanism
21: a first flange
22: second flange
23: adjusting system
30: locking/unlocking device
31: first locking element
32: second locking element
40: locking cam
41: spring element
51: control part
511: first locking element
512: second locking element
53: lock claw
54: a first support part
55: a second supporting part
56: counter support
60: transmission device
61: second transmission cable
70: first elastic return element
72: second elastic return element
75: frame gap
76: travel gap
100: quick folding mechanism
X1: first rotation shaft
X2: second rotation shaft
X3: third rotation shaft
Claims (10)
1. A connection device (10) configured for inclination adjustment and quick folding of a backrest of a seat relative to a seat cushion, comprising:
-at least one inclination adjustment mechanism (20) connecting the seat cushion and the backrest, in particular a first adjustment mechanism connecting a first side of the seat and a second adjustment mechanism connecting a second side of the seat, the at least one inclination adjustment mechanism (20) comprising a first flange (21) and a second flange (22), rotatably mounted to each other to form a connection, comprising a system for adjusting the relative position of the first flange (21) with respect to the second flange (22), the first flange (21) being rotatable about a first rotation axis (X1) with respect to the second flange (22) fixed on the seat cushion (11),
a quick-folding mechanism (100) configured for folding the backrest onto the seat cushion without changing the relative position between the first flange (21) and the second flange (22), in particular between the first flange and the second flange of the inclination adjustment mechanism of only one side of the seat, or even between the first flange and the second flange of the first adjustment mechanism of the first side of the seat and between the first flange and the second flange of the second adjustment mechanism of the second side of the seat, while retaining the adjustment of the inclination of the backrest with respect to the seat cushion in a memory, comprising at least one locking/unlocking means (30) and means for controlling the locking/unlocking means (30),
the locking/unlocking device (30) comprises:
-a first locking element (31) fixed to the first flange (21), and-a second locking element (32) fixed to the frame (14), the second locking element (32) being mounted on the back frame (14) in a manner movable between a first position in which the second locking element (32) cooperates with the first locking element (31) to prevent relative rotation between the frame (14) and the first flange (21), and a second position in which the second locking element (32) allows relative rotation between the frame (14) and the first flange (21),
a locking cam (40) rotatably mounted about a second axis of rotation (X2) parallel to the first axis of rotation (X1), between an active position, in which on the one hand the locking cam (40) is restrained in position by a spring element (41) and holds the second locking element (32) in the first position, and an inactive position, in which on the other hand the locking cam (40) is disengaged from the second locking element (32), whereby the locking cam (40) is configured to move the second locking element (32) from the first position to the second position,
the control device comprising a transmission (60) and a control member (51) controlled by the transmission (60), the control member (51) being pivotally mounted around the second rotation axis (X2) and being fixed to the locking cam (40) and being configured to allow the locking cam (40) to rotate around the second rotation axis (X2) between a locking position, in which the control member (51) holds the locking cam (40) in the active position, and an unlocking position, in which the control member (51) moves the locking cam (40) to the inactive position when the transmission (60) is pulled,
characterized in that the control part (51) comprises a first locking element (511) linked to the transmission (60) and a second locking element (512) pivotally mounted around the second rotation axis (X2) rotatably fixed to the locking cam (40), the first locking element (511) and the second locking element (512) being hinged to each other with a limited travel, so that the control part (51) is configured to allow a first travel (C1) of the first locking element (511) relative to the second locking element (512) from an initial position, the locking cam (40) being held in the active position, and a second travel (C2) of the locking cam (40) around the second rotation axis (X2) towards the inactive position thereof, the second travel (C2) being driven at the end of the first travel (C1).
2. The connection device according to claim 1, characterized in that the first stroke (C1) is an angular movement of the first locking element (511) with respect to the second locking element (512) about a third rotation axis (X3) parallel to the first rotation axis (X1) and the second rotation axis (X2).
3. The connection device according to claim 1 or 2, characterized in that the third rotation shaft (X3) is arranged on the locking cam (40) and/or the second locking element (512).
4. The connection device according to any one of the preceding claims, characterized in that the first locking element (511) comprises a locking claw (53) and the second locking element (512) comprises a first support (54), the locking claw (53) bearing on the first support (54) at the end of the first stroke (C1).
5. The connection device according to any one of the preceding claims, characterized in that the transmission is an unlocking cable (60) attached to one end of the first locking element (511) to pull the locking cam (40) in order to place it in the inactive position.
6. The connection device according to any one of the preceding claims, wherein the control means (51) applies a resilient bias to an initial position of the first locking element (511) with respect to the second locking element (512) by means of a first resilient return element (70) connecting the first locking element (511) and the second locking element (512).
7. The connection device according to claim 6, wherein the control member (51) applies a resilient bias to the locking position by a second resilient return element (72) connecting the second locking member (512) to the frame (14) to return the second locking member (512) to its locking position.
8. The connection device according to any one of the preceding claims, characterized in that the control means (51) are arranged to interfere with a second support (55) carried on the frame (14) by locking the locking cam (40) in its working position when the first locking element (511) is in the initial position with respect to the second locking element (512), and not interfere with the second support (55) in the locked position.
9. The connection device according to claim 8, characterized in that the first locking element (511) comprises a counter-support (56) provided to interfere with the second support (55) when the first locking element (511) is in the initial position with respect to the second locking element (512), thereby locking the locking cam (40) in its working position.
10. A vehicle seat comprising a seat cushion (11) and a backrest (12), the backrest (12) being connected to the seat cushion (11) by a connecting device (10) according to any one of the preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FRFR2209317 | 2022-09-15 | ||
| FR2209317A FR3139770A1 (en) | 2022-09-15 | 2022-09-15 | Articulation equipment for a motor vehicle seat comprising an anti-rotation mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117698524A true CN117698524A (en) | 2024-03-15 |
Family
ID=84362070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311047958.1A Pending CN117698524A (en) | 2022-09-15 | 2023-08-18 | Connection device for a motor vehicle seat comprising an anti-rotation mechanism |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN117698524A (en) |
| DE (1) | DE102023123656A1 (en) |
| FR (1) | FR3139770A1 (en) |
| GB (1) | GB2622943A (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2552787C3 (en) * | 1975-11-25 | 1979-10-25 | Keiper Automobiltechnik Gmbh & Co Kg, 5630 Remscheid | Articulated fittings for seats, in particular vehicle seats |
| US5154476A (en) * | 1991-02-21 | 1992-10-13 | Hoover Universal, Inc. | Locking seat recliner |
| FR2673519B1 (en) | 1991-03-05 | 1993-12-24 | Faure Automobile Bertrand | MECHANISM FOR ADJUSTING THE BACK OF A SEAT. |
| DE10143403A1 (en) * | 2001-09-05 | 2003-03-27 | Keiper Gmbh & Co | Unlocking device in a vehicle seat |
| DE10157273B4 (en) | 2001-11-22 | 2006-01-19 | Faurecia Autositze Gmbh & Co. Kg | Adjustment fitting for a motor vehicle seat, in particular tilt adjustment fitting for the backrest |
| DE10327654B4 (en) * | 2003-06-20 | 2008-12-24 | Keiper Gmbh & Co.Kg | Locking device for a vehicle seat |
| DE102009056154B4 (en) * | 2009-11-25 | 2020-09-17 | Adient Luxembourg Holding S.À R.L. | Fitting for a vehicle seat |
| DE102011100513B3 (en) * | 2011-05-02 | 2012-08-02 | Keiper Gmbh & Co. Kg | Fitting system for a vehicle seat and vehicle seat with a fitting system |
| FR3004393B1 (en) * | 2013-04-12 | 2016-09-09 | Faurecia Sieges D'automobile | PIVOTING BRAKE MECHANISM FOR A VEHICLE SEAT AND SEAT COMPRISING SUCH A MECHANISM |
-
2022
- 2022-09-15 FR FR2209317A patent/FR3139770A1/en active Pending
-
2023
- 2023-08-09 GB GB2312205.4A patent/GB2622943A/en active Pending
- 2023-08-18 CN CN202311047958.1A patent/CN117698524A/en active Pending
- 2023-09-01 DE DE102023123656.3A patent/DE102023123656A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB202312205D0 (en) | 2023-09-20 |
| GB2622943A (en) | 2024-04-03 |
| DE102023123656A1 (en) | 2024-03-21 |
| FR3139770A1 (en) | 2024-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4294488A (en) | Recliner and inertia latch | |
| JP3723797B2 (en) | Vehicle seat with a backrest that can be folded forward | |
| JP4675625B2 (en) | Seat equipment for automotive seats | |
| US6478358B1 (en) | Seat device for a vehicle | |
| US6065804A (en) | Removable folding seat | |
| CN100457500C (en) | Folding recliner of seat for vehicles | |
| EP1420978B1 (en) | Tip easy entry and fold flat recliner assembly | |
| EP2109553B1 (en) | Vehicle seat | |
| US5718481A (en) | Seat recliner mechanism | |
| EP1705056A2 (en) | Seat apparatus having a retractable seat | |
| US6505867B1 (en) | Motorized lock for flaps or doors in motor vehicles, especially a lock for glove compartments | |
| KR20080086879A (en) | Fitting for a vehicle seat | |
| US20050184549A1 (en) | Reversible seat assembly | |
| JPH11351236A (en) | Movable joint mechanism of vehicle seat, and vehicle seat on which the mechanism is mounted | |
| JP2004505846A (en) | Seat adjuster with central position memory for easy entry and exit | |
| JPH02231237A (en) | Sheet provided with inclined folding sheet back | |
| JP2004512878A (en) | Horizontal folding reclining mechanism for automobile seats | |
| WO2009064650A1 (en) | Seat recliner mechanism with fold-flat feature | |
| US7017994B2 (en) | Motor vehicle seat | |
| US20210053475A1 (en) | Cable Driven Head Restraint For A Reversible Seat | |
| JP2007069754A (en) | Unlocking mechanism for vehicle seat | |
| US20030090138A1 (en) | Fitting for a vehicle seat | |
| CN117698524A (en) | Connection device for a motor vehicle seat comprising an anti-rotation mechanism | |
| WO2020198116A2 (en) | Stow in floor seat assembly | |
| US6890035B2 (en) | Disc recliner dump lock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |