FR3075717A1 - ARRANGEMENT OF A DEBRAYABLE SUPPORT FIXED ON A VEHICLE SEAT BACK AND VEHICLE SEAT COMPRISING SUCH A BACKREST. - Google Patents

Abstract

The invention relates to an arrangement of a support (1) having a disengageable connection on a fastening device (5) integral with the frame (4a) of a vehicle seat back (4), the support (1) being intended to accommodate a mobile multimedia device, characterized in that the connection of the support (1) on the fixing device (5) comprises a mechanism (20) guaranteeing the locking of the connection in the position of use of the support (1) and the release of the connection in case of impact on the support (1). The invention also relates to a motor vehicle seat comprising a backrest (4) whose armature (4a) is secured to a fixing device (5) on which is mounted a support (1) having a disengageable connection.

Description

ARRANGEMENT OF A DETACHABLE SUPPORT FIXED ON

A VEHICLE SEAT BACKREST AND VEHICLE SEAT COMPRISING SUCH A BACKREST.

The present invention relates to the arrangement of a disengageable support in the event of an impact, mounted on a fastening device integral with a vehicle seat backrest. This device allows the installation of multimedia devices, mobile devices or objects suitable for this use.

In the state of the art, we know the document FR2855472 which describes a seat back comprising a display screen pivoting about a horizontal axis, in the position of use the display screen is deployed by a rotation of 180 degrees around the horizontal axis in order to be visible to the passenger, in this service position, the display screen is placed substantially at the headrest of the front seat. In the storage position, the display screen is housed in a recess in the backrest, and the display screen has its display face facing the surface of the recess. In this position, the screen is therefore not visible to the passenger. In addition, in the storage position, a tablet covers the display screen which becomes invisible behind the stored tablet. In addition, when the display screen is in the use position, the screen is placed in particular at an uncomfortable height for reading the display screen. In addition, in this configuration the display screen is permanently fixed. Another document FR3023229 relates to an arrangement of a vehicle seat back equipped with a tablet on which is installed a multimedia device which can be oriented in the field of view of the user, the tablet being mobile, according to an angular sector between a position where it rests against the seat back in an adequate position for pressing on a touch screen and playing a multimedia device by a user. It is understood that the range of adjustment of the orientation of the tablet is very restrictive. In order to remedy these drawbacks, a support arrangement removably fixed to a fixing device secured to the frame of the seat back, on which the arm of a support is fixed. We understand that this connection is robust in order to provide a good perceived quality, while offering great freedom of movement. Also in the event of an impact from the vehicle, a user could strike the support and suffer harmful bodily injury.

The object of the invention is therefore to propose an arrangement of a support fixed to a fixing device secured to the frame of the seat back by making it disengageable in order to annihilate the subsequent perverse effects in the event of the vehicle impact. The support is able to accommodate a portable multimedia device. The support device being able to accommodate other types of elements having advantageous and / or attractive functionalities For this purpose, the invention relates to the arrangement of a support having a disengageable link on a fixing device integral with the reinforcement of a vehicle seat back, the support being intended to accommodate a portable multimedia device, the connection of the support on the fixing device comprising a mechanism ensuring the blocking of the connection in the position of use of the support and the unlocking of the connection in the event of an impact on the support.

Advantageously, the mechanism consists of the male fastener having a blind bore in which can slide a sleeve secured to the support arm and a ring closing the bore of the male fastener, itself mounted in the female fastener constituting the fixing device, in a determined position.

According to another advantageous characteristic, the ring and the male fastener are secured together by a pin mounted through the thickness of their walls.

According to another characteristic, the ring has a collar bearing on a flange of the male fastener.

Advantageously, the ring has an internal groove at the edge of its flange receiving an O-ring.

Alternatively, the end of the sleeve has a blind hole receiving a spring bearing on the bottom of the blind bore.

According to another variant, the sleeve comprises a hook forming a circular crown coming to bear on the O-ring under the action of the compression spring.

According to another variant, the free end of the ring from the flange has different lengths over a half diameter connected by inclined faces coming to bear on complementary ends of the sleeve having half diameters and inclined sides.

Advantageously, the sleeve is assembled on the arm of the support by welding.

Furthermore, the invention also relates to a motor vehicle seat comprising a backrest whose frame is secured to a fixing device on which is mounted a support having a disengageable link, having the aforementioned characteristics. Other characteristics and advantages of the invention will appear clearly on reading the description below, given for information with reference to the accompanying drawings in which: - Figure 1 is a perspective view of an arrangement of fixed seats on the floor of a vehicle, a seat comprising a fixing device according to the invention; - Figure 2 is a perspective view of a fixing device whose female fastener is configured to receive a disengageable support according to the invention; - Figure 3 is a perspective view of the arm of a disengageable support whose arm is provided with a male connector according to the invention; - Figure 4 is a perspective view showing the positioning of a suspended support between two adjoining seats, according to the invention; - Figure 5 is a perspective view showing the coupling of the male attachment of the support arm on the female attachment of the fixing device, according to the invention; - Figure 6 is a perspective view showing the disengageable mechanism of the male attachment of the support arm, according to the invention.

Figure 1 is a perspective view of an arrangement of seats 2,3 fixed to the floor 6 of a vehicle, one of these seats 2 comprising a fixing device 5 or holding according to the invention. The seat torque 2,3 fitted with head rests arranged on the floor 6 of the vehicle, for example at the front, may include different configurations. In the first configuration, it can be seen that the fixing device 5 is secured at the top of the backrest 4 and at the edge of its lateral border placed between the two seats 2,3. The fixing device 5 is equipped with a support 7 accommodating a shelf 30 placed between the two seats 2,3. Thus, the tablet 30 can be viewed by the occupants of the two seats not shown, placed at the rear. In a second configuration, the support 1 placed on the fixing device 5 can be oriented behind the seat 2 under the headrest 2a. In this case, the tablet 30 can be viewed or used comfortably only by the occupant of the seat placed at

Figure 2 is a perspective view of a device 5 for fixing the female fastener 8 constituting a first element of the coupling 19 visible in Figure 5, according to the invention. To this end, the female fastener 8 consists of a sleeve of substantially cubic shape oriented along the horizontal 10 and vertical median axes 11. The sleeve 8 comprises a housing 13 of square shape. In addition, the female fastener 8 comprises a ball holder 15 introduced into the wall 13a of the housing 13 of square shape. The ball holder 15 is disposed at the center of a vertical wall of the housing 13. It is understood that the ball 16, called the pusher, is arranged projecting from the wall. This ball 16 is intended to be clipped into one of the grooves made on the walls of the male fastener 9, visible in FIG. 3.

Figure 3 is a perspective view of the arm 17 of a support 1, said arm 17 is provided with a male fastener 9 constituting the second element of the coupling 19, according to the invention. The end piece 9a forming the male attachment 9 of the arm 17 is of square section corresponding to that of the housing 13 of the female attachment 8. On these lateral faces, the male attachment 9 has a vertical groove 18 opening out at the ends. We understand that the male fastener 9 engages in the female fastener 8 and the ball 16 pusher disappears during the sliding of the male fastener 9 comes to engage and clip in the groove 18 of the male fastener 9 producing a quality coupling 19. The coupling 19 of the female 8 and male 9 fasteners of the fixing device 5 and of the support 1 provides a rigid connection and does not allow any degree of freedom in rotation.

Figure 4 is a perspective view showing the coupling 19 and the positioning of a support 1 suspended between two adjoining seats 2, 3 on the device 5 for fixing or holding, according to the invention. It is understood that the support 1 of the shelf 30 comprising two opposite grooves 18, can be extracted from its housing 13 (visible in FIG. 2), by exerting an axial force towards the outside so as to erase the ball 16 in order to uncouple the coupling 19. Then return it 180 degrees, following arrow 36 to reset it in a new position centered behind the backrest 4 of seat 2, offering the passenger seated in the rear seat increased comfort in use.

Figure 5 is a perspective view showing the coupling 19 of the male fastener 9 of the support arm 1 on the female fastener 8 of the fixing device 5, according to the invention. The disengageable mechanism 20 is housed integrally in the male fastener 9 secured to the arm 17 of the support 1. It is understood that the end piece of the male fastener 9 has an outside shape of square section in which a blind bore 21 has been shaped at one end and extending at the other end by a cylindrical flange 24. This bore 21 makes it possible to introduce a cylindrical sleeve 25 secured to the arm 17, capable of sliding freely in said bore 21. A cylindrical hole 26 is provided in the end of the sleeve 25 to receive a compression spring 27 abutting on the bottom of the bore 21. A ring 28 comprising a flange 28a is introduced into the bore 21 of the male fastener 9. The flange 28a of the ring 28 coming to bear on the flange 29 of the endpiece 9. The male fastener 9 is secured to the ring 28 by a pin 30 force-fitted passing through the thickness of the walls of the male fastener 9 and the ring 28 , flush with said walls at each of its ends. The ring 28 has in its internal bore portion 28b at the flange 28a a circular groove 28e in which is housed an O-ring 31. The groove 28e having an edge of smaller diameter, adjusted sliding at the diameter of the base of the sleeve 25. While the other edge has a larger diameter in which is adjusted a notched diameter 25a of the cylindrical sleeve 25, so that said notched 25a can come to bear on the O-ring 31. It is understood that under l action following the arrow 32 of the compression spring 27 the hook 25a constantly comes to bear on the O-ring 31. On the view the male fastener 9 is coupled in the female fastener 8, the ball 16 of the ball holder 15 housed in the wall of the female fastener 8 engaging in the straight groove 18 of the male fastener 9, in order to provide lasting stability free from any vibration.

Figure 6 is a perspective view showing the disengageable mechanism 20 of the male fastener 9 (visible in Figure 5) of the arm 17 of the support 1, according to the invention. In this view, the mechanism 20 is extracted from the bore 21 of the male fastener 9 (visible in FIG. 5). The free end of the ring 28 from the flange 28d have different lengths 28a, 28b on a half diameter. The half diameters 28a, 28b are connected by a pan 28c inclined substantially at 45 degrees. The ring 28 is fixed and secured by means of the male fastener 9 to the female fastener 8, itself secured to the fixing 5 or holding device assembled on the metal frame 4a of the seat back 4 (visible figure 5). From the free end 25d of the sleeve 25, the cylindrical part extends a complementary end having half diameters 25a, 25b and inclined faces 25c, bearing at the end of the ring 28 so that in the normal position of use the ends are contiguous. Thus, when an unexpected violent shock is brought along the arrow 34 on the support 1, corresponding to a predetermined torque, the sleeve 25 linked to the arm 17 undergoes a rotational movement according to the arrow 35, sliding on the slopes 25c, 28c while compressing the compression spring 27, then disengaging the support 1 in order to avoid any bodily injury to the user. The sides 25c, 28c inclined are present on the two half diameters, so the support 1 can be disengaged as well by fading downwards as upwards.

Claims (10)

1. Arrangement of a support (1) having a disengageable link on a fixing device (5) integral with the frame (4a) of a seat back (4) of the vehicle seat (2), the support (1) being intended to accommodate a portable multimedia device (30), characterized in that the connection of the support (1) on the fixing device (5) comprises a mechanism (20) ensuring the blocking of the connection in the position of use of the support (1) and the release of the link in the event of an impact on the support (1). 2. Arrangement of a support (1) according to claim 1, characterized in that the mechanism (20) consists of the male fastener (9) having a blind bore (21) in which can slide a sleeve (25) secured to the arm (17) of the support (1) and a ring (28) for closing the bore (21) of the male fastener (9), itself mounted in the female fastener (8) constituting the device fixing (5), in a determined position. 3. Arrangement of a support (1) according to claim 2, characterized in that the ring (28) and the male fastener (9) are secured together by a pin (30) mounted through the thickness of their walls . 4. Arrangement of a support (1) according to any one of claims 2 or 3, characterized in that the ring (28) has a flange (28d) bearing on a flange (24) of the male fastener (9). 5. Arrangement of a support (1) according to any one of claims 2 to 4, characterized in that the ring (28) has an internal groove (28e) at the edge of its flange (28d) receiving an O-ring ( 31). 6. Arrangement of a support (1) according to claim 2, characterized in that the end of the sleeve (25) has a blind hole (26) receiving a spring (27) bearing on the bottom (22) of the blind bore (21). 7. Arrangement of a support (1) according to any one of claims 2 or 6, characterized in that the sleeve (25) comprises a notch (25d) forming a circular crown bearing on the O-ring (31) under the action of the compression spring (27). 8. Arrangement of a support (1) according to any one of claims 2 to 5, characterized in that the free end of the ring (28) from the flange (28d) has different lengths (28a, 28b) on a half diameter connected by inclined faces (28c) bearing on complementary ends of the sleeve (25) having half diameters (25a, 25b) and inclined faces (25c). 9. Arrangement of a support (1) according to claim 2, characterized in that the sleeve (25) is assembled on the arm (17) of the support (1) by welding. 10. Motor vehicle seat (2) comprising a backrest (4), the frame (4a) of which is secured to a fixing device (5) on which is mounted a support (1) having a disengageable link, according to one any of claims 1 to 9.