FR2811949A1 - Headrest for motor vehicle has two sections mounted on upright rods for relative positioning - Google Patents

Abstract

The headrest for a motor vehicle has two support rods (6,7) supporting respective headrest sections (8,9). The headrest sections can have an aligned position in which they form one headrest plane and a pivoted position in which they form a recess for the head. One cushion section can be mounted on its rod for height adjustment.

Description

HEADREST FOR MOTOR VEHICLE SEAT AND SEAT

  MOTOR VEHICLE EQUIPPED WITH SUCH A HEADREST.

  The present invention relates to head restraints for motor vehicle seats and to

  motor vehicles fitted with such head restraints.

  Known from document JP 61-179112 is a headrest for a motor vehicle seat which comprises a cushion substantially in the shape of a "U" which comprises two lateral parts formed in one piece with a central part which is itself directly carried by two support pins intended to be attached to the seat

of a vehicle.

  The lateral parts of the headrest are mounted angularly adjustable relative to the central part by means of articulated arms which are directly arranged inside the cushion padding and more precisely at the elbows forming the junction between the part

  central and the two side parts.

  Each articulated arm comprises a plurality of rectangular blades which are pivotally mounted around a rod, said rectangular blades being secured alternately with the central part of

  the headrest and one of the corresponding side parts.

  The manufacture of the headrest of document JP 61-

  179112 is made complex and expensive by the presence of two articulation arms inside the cushion itself in addition to the housings to be provided for the support pins, which also tends to increase the weight

general of the headrest.

  The object of the invention is to remedy the above-mentioned drawbacks by means

simple, efficient and inexpensive.

  To this end, the subject of the invention is a headrest for a motor vehicle seat comprising first and second support pins intended to be attached to the backrest of the vehicle seat, characterized in that it comprises, of a share a first cushion mounted pivoting around the first pin between a folded position in which the first cushion is retracted by extending substantially between the first and second pins and a deployed position in which the first cushion has a lateral support surface for the user's head, and secondly, a second cushion

  supported by at least the second pin.

  Thanks to its provisions, the headrest according to the invention thus comprises at least one cushion which is pivotally mounted on a spindle, which therefore makes it possible to avoid any addition of additional part inside the cushion while disposing said cushion between the pins of the headrest when in its folded position, o

  the headrest has a minimal bulk.

  The headrest according to the invention may optionally further include one or more of the following characteristics: - the second cushion has a front bearing surface for the head of the user when the first cushion is in its deployed position; - The first cushion is, moreover, slidably mounted along the first spindle between a high position and a low position; - Said first cushion is provided with a rigid internal frame having a through internal bore which surrounds a portion of the first pin, the immobilization of the first cushion being produced by friction of the bore of said frame against the first pin; - the bore of the internal frame comprises at least one projecting element engaged in a groove made along the first pin, said projecting element coming into abutment contact against the walls of the groove when said first cushion is in position folded down or deployed and / or in the up or down position; - The second cushion is pivotally mounted around the second pin between a folded position in which the second cushion extends substantially between the first and second pins and a deployed position in which the second cushion has a lateral support surface for the head of the user; - The second cushion is provided with a rigid internal frame identical to that of the first cushion; - The first and second cushions are able to take at least one of the following configurations: a first configuration in which the first and second cushions are in their folded position, the assembly formed by the first and second cushions having a surface of front support for the user's head, a second configuration in which the first cushion is in its deployed position and the second cushion is in its folded position, said first and second cushions then having respectively a lateral bearing surface and a surface front support for the head of the user, a third configuration in which the first cushion is in its folded position and the second cushion is in its deployed position, said first and second cushions then respectively presenting a front support surface and a lateral bearing surface for the head of the user, and 30. a fourth configuration in which the first and second cushions are in their deployed position, said cushions then having lateral bearing surfaces forming an angle with respect to each other and the first and second pins having a suitable distance so that the surfaces of lateral supports of said first and second cushions also hold the user's head back; - The first and second pins are connected together by a cross member which forms with said first and second pins a single metal part substantially in the shape of a U, a third cushion being

reported on the sleeper.

  Furthermore, the invention also relates to a motor vehicle seat comprising a backrest which is

  extended upwards by a headrest as defined above

  above, said back having an upper end provided with a first housing and a second housing in which the first and

second pin.

  According to another advantageous characteristic of the seat, the first and second pins are mounted adjustable in height inside the first and second housings of the backrest and the first and second housings are arranged in a recess made on the upper end of the backrest, said headrest being adapted to be retracted into said recess when the first and second cushions extend between the first and

second pin.

  Other features and benefits of

  the invention will appear during the description which follows

  follow from many of its embodiments, given to

  by way of limiting examples, with reference to the accompanying drawings.

  In the drawings: - Figure 1 shows a schematic view of a vehicle seat equipped with a headrest according to the invention, - Figures 2a, 2b and 3a, 3b show the headrest according to the invention in different use configurations on a vehicle seat, - Figure 4 shows a front view of the headrest showing an internal frame of one of the cushions, - Figure 5 shows a top view in section partial of the headrest, and - Figure 6 shows an embodiment of a vehicle seat equipped with headrest according to the invention. In the different figures, the same references

  denote identical or similar elements.

  Figure 1 shows a vehicle seat 1 which includes a seat 2 secured to the floor 3 of the vehicle and a backrest 4 which can be mounted tilting at the end

rear of seat 2.

  The backrest 4 comprises an upper end 41 on which are reported a first pin 6 and a second pin 7 of a headrest 5. The first and second pins 6, 7 extend substantially vertically and they are respectively arranged in housings 42, 43 formed on the upper end 41 of the seat 4 of the vehicle. This headrest 5, as can be seen in detail in FIGS. 4 and 5, mainly comprises a first cushion 8 and a second cushion 9 which are respectively carried by the first and second pins 6 and 7. The headrest also includes a third cushion 10 which is attached to an upper cross member 11 connecting the first and second pins 6 and 7, forming with them a single metal part in the form of an arch, that is to say substantially in the form of "U" reversed. In the example considered in FIGS. 4 and 5, each first and second cushion 8 and 9 is provided with an internal reinforcement 12 (of which only one is shown in the figures) directly disposed inside the padding 13 of the first and second cushions 8 and 9, said padding 13 being, in addition, covered by a flexible cover 14 for covering. Each of the internal reinforcements 12 of the first and second cushions 8, 9 is pivotally mounted on the spindle 6, 7 which is associated with it between a folded position and a deployed position which will be explained in more detail in the remainder of the

  description. Similarly, the frames 12 are also

  sliding mounted along pins 6, 7 between a

  high position and a low position.

  According to one of the possible embodiments, each internal frame 12 is composed of a first substantially rectangular plate and of a second plate 14 also substantially rectangular which is connected to the

  first plate 15 by means of a flexible connection 17.

  The two plates 14 and 15 can in particular be made of a synthetic material chosen from

  plastics or elastomers.

  The first rectangular plate 15 extends substantially between the rear ends 81 and front 82 of the cushion 8 and between its upper ends 84 and

lower 83.

  As can be seen in FIG. 5, the cushions 8 and 9 each have a substantially triangular horizontal section delimited by two bearing surfaces 8a, 8b; 9a, 9b and a rear end 81, 91 of

appreciably rounded shape.

  The two plates 15 and 16 of each frame, when they are folded towards one another, define an internal bore 18 in which is housed one of the pins 6, 7 of the headrest. The plates 14 and 15 of the frame 12 are held against each other by

  example by hot riveting or clipping of said plates.

  Advantageously, each pin 6, 7 has a groove 19 in which engages a projecting element 20 disposed on the internal wall of the bore 18, the groove 19 being dimensioned so that the projecting element 20 comes into contact angular abutment against the walls of said groove when the corresponding cushion 8, 9 is in the folded down or deployed position and / or in the high or low position. In order to maintain the cushions 8 and 9 in a vertical intermediate position between the high and low positions, it is possible to provide that at least a portion of the internal bore 18 of each frame 12 rubs against the corresponding pin 6, 7 with friction. sufficient to immobilize said cushions 8, 9 as long as the latter do not undergo a torque greater than, for example,

  0.5 mdaN compared to the spindle associated with it.

  Thus, when the first cushion 8 and the second cushion 9 are pivotally mounted around their respective pin 6, 7, the headrest is then able to take at least one of the following configurations: - a first configuration (FIG. 2a ) in which the first and second cushions 8, 9 are in their folded position, the cushions then extending substantially between pins 6 and 7. In this first configuration, the first cushion 8 and the second cushion 9 respectively have surfaces d 'front support 8a and 9a on which the head of the user is intended to come into contact, the headrest 5 then being in a conventional form of substantially rectangular horizontal section; - A second configuration (Figure 2b) in which the first cushion 8 is in a deployed position and the second cushion 9 is always in its folded position. In this configuration, the first cushion 8 then has a lateral bearing surface 8b for the head of the user and the second cushion 9 has a front bearing surface 9a which extends substantially to the rear end 81 of the first cushion 8. In this case, the second cushion 9 can also be slightly pivoted towards the front of the backrest so that its front bearing surface 9a is substantially at the same level as the rim 10a of the third cushion 10; - A third configuration (Figure 3a) in which the first cushion 8 is in its folded position and the second cushion 9 is in its deployed position. The user's head then comes to bear both on the front bearing surface 8a of the first cushion 8 and on the lateral bearing surface 9b of the second cushion. It is also understood that in this configuration, the internal frame 12 of the first cushion 8 can come directly into abutment contact on the groove 19 of the spindle 6 by means of the projecting element 20 so that said front bearing surface 8a of the first cushion is at the same level as the rim 10a of the third cushion 10 while extending substantially to the rear end 91 of the second cushion 9 - and finally a fourth configuration (FIG. 3b) in which the first and second cushions 8 and 9 are in their deployed position, the lateral bearing surfaces 8b and 9b then forming between them a certain angle to allow lateral retention on both sides of the user's head and also its retention towards the rear. In order to ensure perfect retention of the user's head towards the rear, provision may be made for the respective ends 81 and 91 of the cushions 8 and 9 to be spaced apart from each other by a distance of approximately 6 cm for an angle between the two side surfaces 8b, 9b of approx.

  In addition, in order to make use of the support-

  head compatible with users of different sizes, provision can also be made to mount the sliding pins 6 and 7 in the housings 42, 43 of the backrest 4 of the vehicle in order to adapt the height of the third cushion 10

  depending on the size of the user.

  According to another embodiment of the vehicle seat shown in FIG. 6, it is also possible to produce at least one recess 45 on the upper end 41 and the front face 44 of the back of the vehicle seat, the recess then being provided with two housings 42 and 43 in which the support pins 6, 7 are slidably mounted. The dimensions of the recess will then be adapted to allow the headrest 5 to be retracted when the cushions 8 and 9 are in their folded position so that the cushion 10 is aligned with the upper end 41 of the backrest while the cushions 8 and 9 are aligned with the front face of the backrest. This embodiment is particularly advantageous when the seat is constituted by a rear seat of the vehicle. In this case, the retraction of the head restraint (s) of the rear seat allows the driver of the vehicle to have better rear view. Similarly, the retraction of the head restraints also makes it possible to tilt the seat backrest forward to a substantially horizontal position without said head restraints coming into contact with the

  front seat backrest of the vehicle.

Claims (11)

  1. Headrest for seat (1) of a motor vehicle comprising first and second support pins (6,7) intended to be attached to the seat back (1) of the vehicle, characterized in that it comprises, d firstly, a first cushion (8) pivotally mounted around the first pin (6) between a folded position in which the first cushion (8) is retracted, extending substantially between the first and second pins (6,7) and a deployed position in which the first cushion (8) has a lateral bearing surface (8b) for the head of the user, and on the other hand, a second cushion (9)   supported by at least the second pin (7).   2. Headrest according to claim 1, wherein the second cushion (9) has a front bearing surface (9a) for the head of the user when the first   cushion (8) is in its deployed position.   3. Headrest according to one or other of the   claims 1 and 2, wherein the first cushion (8)   is also slidably mounted along the first   pin (6) between a high position and a low position.   4. Headrest according to claim 3, wherein said first cushion (8) is provided with a rigid internal frame (12) having a through internal bore (18) which surrounds a portion of the first pin (6), l immobilization of the first cushion (8) being produced by friction of the bore (18) of said frame (12) against the first spindle (6).   5. Headrest according to claim 4, wherein the bore (18) of the internal frame (12) comprises at least one projecting element (20) engaged in a groove (19) made along the first pin (6), said projecting element (20) coming into abutment contact against the walls of the groove (19) when said first cushion (8) is in the folded down or deployed position and / or in the high or low.   6. Headrest according to any one of   previous claims, wherein the second cushion   (9) is pivotally mounted around the second pin (7) between a folded position in which the second cushion extends substantially between the first and second pins (6,7) and a deployed position in which the second cushion has a surface lateral support (9b) for the user's head.   7. Headrest according to claim 6 in   combination with either of claims 4 and   , in which the second cushion (9) is provided with a rigid internal frame (12) identical to that of the first cushion (8).   8. Headrest according to either of claims 6 and 7, wherein the first and second cushions (8,9) are capable of taking at least one of the following configurations: - a first configuration in which the first and second cushions (8,9) are in their folded position, the assembly formed by the first and second cushions (8,9) having a front bearing surface (8a, 9a) for the head of the user , - a second configuration in which the first cushion (8) is in its deployed position and the second cushion (9) is in its folded position, said first and second cushions then respectively having a lateral bearing surface (8b) and a front bearing surface (9a) for the user's head, - a third configuration in which the first cushion (8) is in its folded position and the second cushion (9) is in its deployed position, said first and second cushions then presenting respectively a front bearing surface (8a) and a lateral bearing surface (9b) for the head of the user, and - a fourth configuration in which the first and second cushions (8,9) are in their deployed position, said cushions then having lateral bearing surfaces (8a, 9a) forming an angle with respect to each other and the first and second pins (6,7) having a suitable distance so that the lateral bearing surfaces said first and second cushions retain   also the user's head back.   9. Headrest according to any one of   previous claims, wherein the first and   second pins (6,7) are interconnected by a cross member (11) which forms with said first and second pins a single metal part substantially in the shape of a "U", a third cushion (10) being attached to the cross member. 10. Motor vehicle seat comprising a backrest (4) which is extended upwards by a headrest   (5) according to any one of the preceding claims,   said backrest (4) having an upper end (41) provided with a first housing (42) and a second housing (43) in which are respectively housed the   first and second pins (6,7).   11. A car seat according to claim 10, in which the first and second pins (6,7) are mounted adjustable in height inside the first and second housings of the backrest (42,43), and the first and second housings ( 42,43) are arranged in a recess (45) produced on the upper end (41) of the backrest, said headrest (5) being adapted to be retracted into said recess (45) when the first and second cushions (8 , 9) extend between the first and second pins (6,7).