WO2008068372A1 - Headrest for automobile vehicle seats - Google Patents

Headrest for automobile vehicle seats Download PDF

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Publication number
WO2008068372A1
WO2008068372A1 PCT/ES2007/070188 ES2007070188W WO2008068372A1 WO 2008068372 A1 WO2008068372 A1 WO 2008068372A1 ES 2007070188 W ES2007070188 W ES 2007070188W WO 2008068372 A1 WO2008068372 A1 WO 2008068372A1
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WO
WIPO (PCT)
Prior art keywords
headrest
mobile support
support
locking
fixed
Prior art date
Application number
PCT/ES2007/070188
Other languages
Spanish (es)
French (fr)
Inventor
Alberto Cuadrado Gonzalez
Joseba Palacio Argüelles
Original Assignee
Batz, S.Coop.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Batz, S.Coop. filed Critical Batz, S.Coop.
Publication of WO2008068372A1 publication Critical patent/WO2008068372A1/en

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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
    • B60N2/80—Head-rests
    • B60N2/888—Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

Definitions

  • the present invention relates to head restraints for motor vehicle seats, adapted to reduce the risk of injury by the user to a possible collision.
  • Headrests which comprise two bodies, one anterior and the other posterior, the anterior body being movable between a resting position, in which the anterior body is attached to the posterior body, and another active for the case in which the vehicle receives a subsequent impact
  • the anterior body In said active position the anterior body is separated from the posterior body and moved towards the seat occupant, thus reducing the travel of the occupant's head until reaching its support in the headrest, and therefore also reducing the phenomenon known as "whiplash ".
  • the mechanisms for the displacement of the front body of the headrest are usually based on the action of a spring, of a hydraulic system etc.
  • ES-1052173-U describes an active headrest for automobile vehicle seats comprising a rear body attached to a fixed support, an anterior body attached to a movable mobile support with respect to said fixed support, and drive means for moving said mobile support from a resting position to an active position of the headrest.
  • Mobile support tilts with respect to an axis, to move from said rest position to said active position.
  • ES-1063006-U discloses a headrest comprising a rear body attached to a fixed support, an anterior body attached to a movable mobile support with respect to said fixed support, drive means for moving said mobile support from a rest position to a active position of the headrest, and at least one tilting arm attached at one end to the fixed support and attached at the other end to the mobile support, causing the actuating means that said tilting arm pivots when actuated and causing said pivoting the displacement of said mobile support from the rest position to the active position.
  • the object of the invention is to provide a headrest for motor vehicle seats, which reduces the risk of a user suffering from the phenomenon known as "whiplash" in the event of a vehicle collision.
  • the headrest of the invention comprises a fixed rear support, a movable anterior mobile support with respect to said fixed support, actuation means for moving said mobile support from a rest position to an active position of the headrest, and at least one attached swing arm at one end to the fixed support and attached at the other end to the mobile support, the actuating means causing said swing arm to pivot when they are actuated and causing said pivoting to move said mobile support from the rest position to the position active
  • the tilting arm comprises a toothed sector and the headrest comprises locking means comprising at least one locking arm that is attached at a first end to the mobile support with the possibility of rotation and which is supported at a second end on the toothed sector. Said second end cooperates with said toothed sector to prevent the backing of said mobile support towards the rest position when the actuating means causes said mobile support to move to the active position.
  • the head restraint drive means causes the front mobile support to move forward to move to the active position and stop the user's head recoil. It may happen that the head of the user hits the headrest before the previous mobile support reaches the end of its travel, thereby there is a risk that said mobile support moves back to its resting position.
  • this recoil is avoided by means of the blocking means, since said blocking means allow the movement of the mobile support in only one direction: from the rest position to the active position.
  • FIG. 1 shows a side view of an embodiment of the headrest of the invention in the rest position.
  • FIG. 2 is a side view of the embodiment of FIG. 1 in active position.
  • FIG. 3 is a first perspective view of the embodiment of FIG. 1 in active position.
  • FIG. 4 is a second perspective view of the embodiment of FIG. 1 in active position.
  • FIG. 5 is a partial perspective view of the embodiment of FIG. 1 in active position.
  • FIG. 6 is a partial perspective view of the embodiment of FIG. 1 in active position and with locking means engaged.
  • the headrest 1 of the invention comprises a fixed rear support 3, a movable front support 5 movable with respect to said fixed support 3, and actuation means for moving said movable support from a rest position, shown in figure 1, to an active position, shown in the other figures.
  • the fixed rear support 3 and the anterior mobile support 5 are coated respectively with a fluffy rear body and anterior body (not shown in the figures) comprising, for example, a viscoelastic foam.
  • the fixed support 3 is connected to two parallel columns 7 connected to the seat back (not shown in the figures).
  • the headrest 1 comprises two tilting arms 7 attached at one end to the fixed support 3 and attached at the other end to the mobile support 5.
  • the actuation means of the headrest 1 cause said tilting arms 7 to pivot when they are actuated, causing said pivoting to move said mobile support 5 from the rest position to the active position.
  • the actuation means which are fixed to the fixed support 3, comprise an electromagnet 6 with its corresponding permanent magnet and its corresponding coil, and a pusher 6a comprising a metallic element 6b and acting on the swinging arms 7.
  • the actuating means also comprise, on both sides of the electromagnet 6, two springs 30 housed in their corresponding support axes 31, said springs 30 exerting a determined force on the pusher 6a. Under normal conditions, said pusher 6a is in contact with said electromagnet 6, since the permanent magnet of the electromagnet 6 attracts the metallic element 6b and exceeds the force that the springs 30 exert on the pusher 6a.
  • the coil of the electromagnet 6 is fed and creates a magnetic field that counteracts the force of the permanent magnet and causes the pusher 6a to move.
  • the force exerted by the springs 30 is calculated so that the mobile support 3 moves quickly enough to reach the user's head before suffering any cervical injury, but also soft enough not to damage the user.
  • the tilting arms 7 are attached at one end to a transverse pivot axis 8 attached to the fixed support 3 and at the other end to a transverse joint axis 9 attached to the movable support 5. Said tilting arms 7 are also attached to an axis of transverse drive 10, at a point substantially close to pivot axis 8, said drive shaft 10 being attached to pusher 6a. Said pusher 6a comprises in this embodiment two parallel arms 6c that are crossed by said drive shaft 10. Thus, in the event of a collision, pusher 6a moves the drive shaft 10, pivoting the swing arms 7 with respect to its corresponding axis. pivot 8, thus moving the mobile support 5 from the rest position to the active position.
  • Said displacement of the mobile support 5 combines a tilting with a vertical displacement, whereby said headrest 1 is better adjusted to the position of the occupant's head than in the case that said displacement is solely of tilting.
  • the metallic element 6b is again placed in contact with the electromagnet 6.
  • the headrest 1 of the invention comprises two auxiliary arms 12 that provide rigidity to the headrest 1.
  • Each of said auxiliary arms 12 is attached at one end to a transverse auxiliary pivot axis 14 attached to the fixed support 3 and at the other end to a transverse auxiliary joint shaft 15 attached to the mobile support 5.
  • Said auxiliary arms 12 are arranged on one side of both fixed and mobile supports 3, 4, and aligned with the tilting arms 7.
  • the design of the tilting and auxiliary arms 7 of the headrest 1 can be varied, thus obtaining for each specific design a corresponding displacement of the movable support 5.
  • the swinging arms 7 comprise two non-aligned sections: a first straight section between the pivot axis 8 and the drive shaft 10, and a second section between the drive shaft 10 and the joint axis 9.
  • each tilting arm 7 comprises a toothed sector 18, and the headrest 1 comprises said locking means comprising in this embodiment two locking arms 19 which are connected at a first end to the mobile support 5 with possibility of rotation and that they are supported at a second end on the toothed sector 18, said second end cooperating with said toothed sector 18 to prevent the recoil of said mobile support 5 towards the rest position when the actuating means cause the displacement of said 5 mobile support to the active position.
  • Each locking arm 19 comprises, as seen in Figure 5, a torsion spring 33 which causes the locking arm 19 to press against the toothed sector 18 of its corresponding swing arm 7.
  • the blocking means comprise in this embodiment manual reset means comprising, two handles 23 for releasing the locking arms 19 from the corresponding toothed sector 18 when the mobile support 5 is in the active position, and elastic coupling means 24, shown in 5 to engage the blocking means in a projection 21 disposed in the mobile support 5 by moving said blocking means towards said mobile support 5. Said engagement means 24 are released from said projection 21 when the mobile support 5 It is moved to the resting position.
  • the locking means comprise, as also shown in Figure 5, a transverse axis 26 that joins both locking arms 19, the handles 23 being joined to the ends of the transverse axis 23.
  • the coupling means 24 are arranged in the space between the two locking arms 19 and fixed to said transverse axis 26.
  • the coupling means 24 comprise a projection 22 and two extensions 25.
  • Figure 6 shows the headrest 1 in active position and with the locking means engaged in the shoulder 21 of the fixed support 3. It is observed that it is the projection 22 of the hooking means 24 that engages in said shoulder 21.
  • the extensions 25 are pushed by the drive shaft 10, releasing said engaging means 24 from the shoulder 21 and causing the headrest 1 to return to its position of original rest.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)

Abstract

Headrest for automobile vehicle seats comprising a fixed back supporting means (3), a mobile front supporting means (5) that is movable with respect to the fixed back supporting means (3) and means of actuation for moving said mobile supporting means (5) from a position of rest to an active position for the headrest (1). In addition said headrest includes at least one tilting arm (7) attached at one end to the fixed supporting means (3) and attached at the other end to the mobile supporting means (5), wherein the means of actuation cause the tilting arm (7) to pivot when same are actuated and with said pivoting thereby causing the movement of said mobile supporting means (5). Said headrest (1) also includes locking means for preventing backward movement of said mobile supporting means (5) towards the rest position when the means of actuation cause said mobile supporting means (5) to move to the active position.

Description

D E S C R I P C I Ó N D E S C R I P C I Ó N
"Reposacabezas para asientos de vehículos automóviles""Headrest for car seats"
SECTOR DE LA TÉCNICASECTOR OF THE TECHNIQUE
La presente invención se relaciona con reposacabezas para asientos de vehículos automóviles, adaptados para reducir el riesgo a sufrir lesiones por parte del usuario ante una posible colisión.The present invention relates to head restraints for motor vehicle seats, adapted to reduce the risk of injury by the user to a possible collision.
ESTADO ANTERIOR DE LA TÉCNICAPREVIOUS STATE OF THE TECHNIQUE
Son conocidos reposacabezas que comprenden dos cuerpos, uno anterior y otro posterior, siendo el cuerpo anterior desplazable entre una posición de reposo, en la cual el cuerpo anterior queda adosado al cuerpo posterior, y otra activa para el caso en el que el vehículo reciba un impacto posterior. En dicha posición activa el cuerpo anterior queda separado del cuerpo posterior y desplazado hacia el ocupante del asiento, reduciendo así el recorrido de la cabeza del ocupante hasta alcanzar su apoyo en el reposacabezas, y por lo tanto reduciendo también el fenómeno conocido como "latigazo cervical" .Headrests are known which comprise two bodies, one anterior and the other posterior, the anterior body being movable between a resting position, in which the anterior body is attached to the posterior body, and another active for the case in which the vehicle receives a subsequent impact In said active position the anterior body is separated from the posterior body and moved towards the seat occupant, thus reducing the travel of the occupant's head until reaching its support in the headrest, and therefore also reducing the phenomenon known as "whiplash ".
Los mecanismos para el desplazamiento del cuerpo anterior del reposacabezas suelen estar basados en la acción de un resorte, de un sistema hidráulico etc.The mechanisms for the displacement of the front body of the headrest are usually based on the action of a spring, of a hydraulic system etc.
ES-1052173-U describe un reposacabezas activo para asientos de vehículos automóviles que comprende un cuerpo posterior unido a un soporte fijo, un cuerpo anterior unido a un soporte móvil desplazable con respecto a dicho soporte fijo, y medios de accionamiento para desplazar dicho soporte móvil desde una posición de reposo a una posición activa del reposacabezas. El soporte móvil bascula con respecto a un eje, para desplazarse desde dicha posición de reposo a dicha posición activa.ES-1052173-U describes an active headrest for automobile vehicle seats comprising a rear body attached to a fixed support, an anterior body attached to a movable mobile support with respect to said fixed support, and drive means for moving said mobile support from a resting position to an active position of the headrest. Mobile support tilts with respect to an axis, to move from said rest position to said active position.
ES-1063006-U divulga un reposacabezas que comprende un cuerpo posterior unido a un soporte fijo, un cuerpo anterior unido a un soporte móvil desplazable con respecto a dicho soporte fijo, medios de accionamiento para desplazar dicho soporte móvil desde una posición de reposo a una posición activa del reposacabezas, y al menos un brazo basculante unido en un extremo al soporte fijo y unido en el otro extremo al soporte móvil, provocando los medios de accionamiento que dicho brazo basculante pivote cuando son accionados y provocándose con dicho pivotamiento el desplazamiento de dicho soporte móvil desde la posición de reposo hasta la posición activa .ES-1063006-U discloses a headrest comprising a rear body attached to a fixed support, an anterior body attached to a movable mobile support with respect to said fixed support, drive means for moving said mobile support from a rest position to a active position of the headrest, and at least one tilting arm attached at one end to the fixed support and attached at the other end to the mobile support, causing the actuating means that said tilting arm pivots when actuated and causing said pivoting the displacement of said mobile support from the rest position to the active position.
EXPOSICIÓN DE LA INVENCIÓNEXHIBITION OF THE INVENTION
El objeto de la invención es el de proporcionar un reposacabezas para asientos de vehículos automóviles, que reduzca el riesgo de que un usuario sufra el fenómeno conocido como "latigazo cervical" ante una colisión del vehículo.The object of the invention is to provide a headrest for motor vehicle seats, which reduces the risk of a user suffering from the phenomenon known as "whiplash" in the event of a vehicle collision.
El reposacabezas de la invención comprende un soporte fijo posterior, un soporte móvil anterior desplazable con respecto a dicho soporte fijo, medios de accionamiento para desplazar dicho soporte móvil desde una posición de reposo a una posición activa del reposacabezas, y al menos un brazo basculante unido en un extremo al soporte fijo y unido en el otro extremo al soporte móvil, provocando los medios de accionamiento que dicho brazo basculante pivote cuando son accionados y provocándose con dicho pivotamiento el desplazamiento de dicho soporte móvil desde la posición de reposo hasta la posición activa .The headrest of the invention comprises a fixed rear support, a movable anterior mobile support with respect to said fixed support, actuation means for moving said mobile support from a rest position to an active position of the headrest, and at least one attached swing arm at one end to the fixed support and attached at the other end to the mobile support, the actuating means causing said swing arm to pivot when they are actuated and causing said pivoting to move said mobile support from the rest position to the position active
El brazo basculante comprende un sector dentado y el reposacabezas comprende medios de bloqueo que comprenden al menos un brazo de bloqueo que está unido por un primer extremo al soporte móvil con posibilidad de giro y que está apoyado en un segundo extremo sobre el sector dentado. Dicho segundo extremo coopera con dicho sector dentado para impedir el retroceso de dicho soporte móvil hacia la posición de reposo cuando los medios de accionamiento provocan el desplazamiento de dicho soporte móvil a la posición activa.The tilting arm comprises a toothed sector and the headrest comprises locking means comprising at least one locking arm that is attached at a first end to the mobile support with the possibility of rotation and which is supported at a second end on the toothed sector. Said second end cooperates with said toothed sector to prevent the backing of said mobile support towards the rest position when the actuating means causes said mobile support to move to the active position.
En caso de que el vehículo reciba un impacto posterior, los medios de accionamiento del reposacabezas hacen que el soporte móvil anterior se desplace hacia adelante para pasar a la posición activa y pare el retroceso de la cabeza del usuario. Puede ocurrir que la cabeza del usuario golpee el reposacabezas antes de que el soporte móvil anterior llegue al final de su recorrido, con lo cual existe el riesgo de que dicho soporte móvil retroceda hacia su posición de reposo. En el reposacabezas de la invención, este retroceso se evita mediante los medios de bloqueo, ya que dichos medios de bloqueo permiten el desplazamiento del soporte móvil en un único sentido: desde la posición de reposo hacia la posición activa.In the event that the vehicle receives a subsequent impact, the head restraint drive means causes the front mobile support to move forward to move to the active position and stop the user's head recoil. It may happen that the head of the user hits the headrest before the previous mobile support reaches the end of its travel, thereby there is a risk that said mobile support moves back to its resting position. In the head restraint of the invention, this recoil is avoided by means of the blocking means, since said blocking means allow the movement of the mobile support in only one direction: from the rest position to the active position.
Estas y otras ventajas y características de la invención se harán evidentes a la vista de las figuras y de la descripción detallada de la invención.These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
La FIG. 1 muestra una vista lateral de una realización del reposacabezas de la invención en posición de reposo. La FIG. 2 es una vista lateral de la realización de la FIG. 1 en posición activa.FIG. 1 shows a side view of an embodiment of the headrest of the invention in the rest position. FIG. 2 is a side view of the embodiment of FIG. 1 in active position.
La FIG. 3 es una primera vista en perspectiva de la realización de la FIG. 1 en posición activa.FIG. 3 is a first perspective view of the embodiment of FIG. 1 in active position.
La FIG. 4 es una segunda vista en perspectiva de la realización de la FIG. 1 en posición activa.FIG. 4 is a second perspective view of the embodiment of FIG. 1 in active position.
La FIG. 5 es una vista parcial en perspectiva de la realización de la FIG. 1 en posición activa.FIG. 5 is a partial perspective view of the embodiment of FIG. 1 in active position.
La FIG. 6 es una vista en parcial en perspectiva de la realización de la FIG. 1 en posición activa y con los medios de bloqueo enganchados .FIG. 6 is a partial perspective view of the embodiment of FIG. 1 in active position and with locking means engaged.
EXPOSICIÓN DETALLADA DE LA INVENCIÓNDETAILED EXHIBITION OF THE INVENTION
Según se muestra en las figuras, el reposacabezas 1 de la invención comprende un soporte fijo 3 posterior, un soporte móvil 5 anterior desplazable con respecto a dicho soporte fijo 3, y medios de accionamiento para desplazar dicho soporte móvil desde una posición de reposo, mostrada en la figura 1, a una posición activa, mostrada en las demás figuras. El soporte fijo 3 posterior y el soporte móvil 5 anterior se recubren respectivamente con un cuerpo posterior y un cuerpo anterior mullidos (no representados en las figuras) que comprenden, por ejemplo, una espuma viscoelástica . El soporte fijo 3 está unido a dos columnasl7 paralelas unidas al respaldo del asiento (no representado en las figuras) .As shown in the figures, the headrest 1 of the invention comprises a fixed rear support 3, a movable front support 5 movable with respect to said fixed support 3, and actuation means for moving said movable support from a rest position, shown in figure 1, to an active position, shown in the other figures. The fixed rear support 3 and the anterior mobile support 5 are coated respectively with a fluffy rear body and anterior body (not shown in the figures) comprising, for example, a viscoelastic foam. The fixed support 3 is connected to two parallel columns 7 connected to the seat back (not shown in the figures).
En la realización mostrada en las figuras, el reposacabezas 1 comprende dos brazos basculantes 7 unidos en un extremo al soporte fijo 3 y unidos en el otro extremo al soporte móvil 5. Los medios de accionamiento del reposacabezas 1 provocan que dichos brazos basculantes 7 pivoten cuando son accionados, provocándose con dicho pivotamiento el desplazamiento de dicho soporte móvil 5 desde la posición de reposo hasta la posición activa .In the embodiment shown in the figures, the headrest 1 comprises two tilting arms 7 attached at one end to the fixed support 3 and attached at the other end to the mobile support 5. The actuation means of the headrest 1 cause said tilting arms 7 to pivot when they are actuated, causing said pivoting to move said mobile support 5 from the rest position to the active position.
Tal como se muestra en la figura 3, los medios de accionamiento, que están fijados al soporte fijo 3, comprenden un electroimán 6 con su correspondiente imán permanente y con su correspondiente bobina, y un empujador 6a que comprende un elemento metálico 6b y que actúa sobre los brazos basculantes 7. Los medios de accionamiento comprenden también, a ambos lados del electroimán 6, sendos muelles 30 alojados en sus correspondientes ejes soporte 31, ejerciendo dichos muelles 30 una fuerza determinada al empujador 6a. En condiciones normales, dicho empujador 6a está en contacto con dicho electroimán 6, ya que el imán permanente del electroimán 6 atrae el elemento metálico 6b y supera la fuerza que los muelles 30 ejercen sobre el empujador 6a. En caso de colisión, la bobina del electroimán 6 es alimentada y crea un campo magnético que contrarresta la fuerza del imán permanente y hace que se desplace el empujador 6a. La fuerza que ejercen los muelles 30 está calculada para que el soporte móvil 3 se mueva lo suficientemente rápido como para que alcance la cabeza del usuario antes de que sufra ninguna lesión cervical, pero también lo suficientemente suave como para no dañar al usuario.As shown in Figure 3, the actuation means, which are fixed to the fixed support 3, comprise an electromagnet 6 with its corresponding permanent magnet and its corresponding coil, and a pusher 6a comprising a metallic element 6b and acting on the swinging arms 7. The actuating means also comprise, on both sides of the electromagnet 6, two springs 30 housed in their corresponding support axes 31, said springs 30 exerting a determined force on the pusher 6a. Under normal conditions, said pusher 6a is in contact with said electromagnet 6, since the permanent magnet of the electromagnet 6 attracts the metallic element 6b and exceeds the force that the springs 30 exert on the pusher 6a. In the event of a collision, the coil of the electromagnet 6 is fed and creates a magnetic field that counteracts the force of the permanent magnet and causes the pusher 6a to move. The force exerted by the springs 30 is calculated so that the mobile support 3 moves quickly enough to reach the user's head before suffering any cervical injury, but also soft enough not to damage the user.
Los brazos basculantes 7 están unidos en un extremo a un eje de pivotación 8 transversal unido al soporte fijo 3 y en el otro extremo a un eje de unión 9 transversal unido al soporte móvil 5. Dichos brazos basculantes 7 están también unidos a un eje de impulsión 10 transversal, en un punto sustancialmente próximo al eje de pivotación 8, estando dicho eje de impulsión 10 unido al empujador 6a. Dicho empujador 6a comprende en esta realización dos brazos 6c paralelos que son atravesados por dicho eje de impulsión 10. De esta manera, en caso de colisión el empujador 6a desplaza el eje de impulsión 10, pivotando los brazos basculantes 7 con respecto a su correspondiente eje de pivotación 8, desplazándose así el soporte móvil 5 desde la posición de reposo a la posición activa. Dicho desplazamiento del soporte móvil 5 combina una basculación con un desplazamiento vertical, por lo cual dicho reposacabezas 1 se ajusta mejor a la posición de la cabeza del ocupante que en el caso de que dicho desplazamiento sea únicamente de basculación. Cuando se dispone el soporte móvil 5 otra vez en la posición de reposo, el elemento metálico 6b vuelve a disponerse en contacto con el electroimán 6.The tilting arms 7 are attached at one end to a transverse pivot axis 8 attached to the fixed support 3 and at the other end to a transverse joint axis 9 attached to the movable support 5. Said tilting arms 7 are also attached to an axis of transverse drive 10, at a point substantially close to pivot axis 8, said drive shaft 10 being attached to pusher 6a. Said pusher 6a comprises in this embodiment two parallel arms 6c that are crossed by said drive shaft 10. Thus, in the event of a collision, pusher 6a moves the drive shaft 10, pivoting the swing arms 7 with respect to its corresponding axis. pivot 8, thus moving the mobile support 5 from the rest position to the active position. Said displacement of the mobile support 5 combines a tilting with a vertical displacement, whereby said headrest 1 is better adjusted to the position of the occupant's head than in the case that said displacement is solely of tilting. When the movable support 5 is arranged again in the rest position, the metallic element 6b is again placed in contact with the electromagnet 6.
Tal como se muestra en las figuras, el reposacabezas 1 de la invención comprende dos brazos auxiliares 12 que proporcionan rigidez al reposacabezas 1. Cada uno de dichos brazos auxiliares 12 está unido en un extremo a un eje de pivotación auxiliar 14 transversal unido al soporte fijo 3 y en el otro extremo a un eje de unión auxiliar 15 transversal unido al soporte móvil 5. Dichos brazos auxiliares 12 están dispuestos a un lado de ambos soportes fijo y móvil 3, 4, y alineados con los brazos basculantes 7.As shown in the figures, the headrest 1 of the invention comprises two auxiliary arms 12 that provide rigidity to the headrest 1. Each of said auxiliary arms 12 is attached at one end to a transverse auxiliary pivot axis 14 attached to the fixed support 3 and at the other end to a transverse auxiliary joint shaft 15 attached to the mobile support 5. Said auxiliary arms 12 are arranged on one side of both fixed and mobile supports 3, 4, and aligned with the tilting arms 7.
El diseño de los brazos basculantes 7 y auxiliares 12 del reposacabezas 1 se puede variar, obteniendo así para cada diseño específico un desplazamiento correspondiente del soporte móvil 5. En la realización mostrada, según se observa en la figura 2, los brazos basculantes 7 comprenden dos tramos no alineados: un primer tramo recto entre el eje de pivotación 8 y el eje de impulsión 10, y un segundo tramo entre el eje de impulsión 10 y el eje de unión 9. Aunque el objeto del presente modelo de utilidad es un reposacabezas con los medios de bloqueo que se describen a continuación, cabría diseñar un reposacabezas con las características descritas hasta el momento, prescindiendo de dichos medios de bloqueo.The design of the tilting and auxiliary arms 7 of the headrest 1 can be varied, thus obtaining for each specific design a corresponding displacement of the movable support 5. In the embodiment shown, as shown in Figure 2, the swinging arms 7 comprise two non-aligned sections: a first straight section between the pivot axis 8 and the drive shaft 10, and a second section between the drive shaft 10 and the joint axis 9. Although the object of the present utility model It is a head restraint with the locking means described below, a head restraint with the characteristics described so far could be designed, regardless of said locking means.
En el reposacabezas 1 de la invención, cada brazo basculante 7 comprende un sector dentado 18, y el reposacabezas 1 comprende los citados medios de bloqueo que comprenden en esta realización dos brazos de bloqueo 19 que están unidos por un primer extremo al soporte móvil 5 con posibilidad de giro y que están apoyado en un segundo extremo sobre el sector dentado 18, cooperando dicho segundo extremo con dicho sector dentado 18 para impedir el retroceso de dicho soporte móvil 5 hacia la posición de reposo cuando los medios de accionamiento provocan el desplazamiento de dicho soporte móvil 5 a la posición activa. Cada brazo de bloqueo 19 comprende, tal como se observa en la figura 5, un muelle de torsión 33 que hace que el brazo de bloqueo 19 presione contra el sector dentado 18 de su brazo basculante 7 correspondiente .In the headrest 1 of the invention, each tilting arm 7 comprises a toothed sector 18, and the headrest 1 comprises said locking means comprising in this embodiment two locking arms 19 which are connected at a first end to the mobile support 5 with possibility of rotation and that they are supported at a second end on the toothed sector 18, said second end cooperating with said toothed sector 18 to prevent the recoil of said mobile support 5 towards the rest position when the actuating means cause the displacement of said 5 mobile support to the active position. Each locking arm 19 comprises, as seen in Figure 5, a torsion spring 33 which causes the locking arm 19 to press against the toothed sector 18 of its corresponding swing arm 7.
Los medios de bloqueo comprenden en esta realización medios de rearme manual que comprenden, dos manetas 23 para liberar los brazos de bloqueo 19 del sector dentado 18 correspondiente cuando el soporte móvil 5 está en la posición activa, y medios de enganche 24 elásticos, mostrados en la figura 5, para enganchar los medios de bloqueo en un resalte 21 dispuesto en el soporte móvil 5 mediante el desplazamiento de dichos medios de bloqueo hacia dicho soporte móvil 5. Dichos medios de enganche 24 se liberan de dicho resalte 21 cuando el soporte móvil 5 es desplazado a la posición de reposo.The blocking means comprise in this embodiment manual reset means comprising, two handles 23 for releasing the locking arms 19 from the corresponding toothed sector 18 when the mobile support 5 is in the active position, and elastic coupling means 24, shown in 5 to engage the blocking means in a projection 21 disposed in the mobile support 5 by moving said blocking means towards said mobile support 5. Said engagement means 24 are released from said projection 21 when the mobile support 5 It is moved to the resting position.
Los medios de bloqueo comprenden, tal como se muestra también en la figura 5, un eje transversal 26 que une ambos brazos de bloqueo 19, estando las manetas 23 unidas a los extremos del eje transversal 23. Los medios de enganche 24 están dispuestos en el espacio entre los dos brazos de bloqueo 19 y fijados a dicho eje transversal 26. Los medios de enganche 24 comprenden un saliente 22 y dos prolongaciones 25.The locking means comprise, as also shown in Figure 5, a transverse axis 26 that joins both locking arms 19, the handles 23 being joined to the ends of the transverse axis 23. The coupling means 24 are arranged in the space between the two locking arms 19 and fixed to said transverse axis 26. The coupling means 24 comprise a projection 22 and two extensions 25.
La figura 6 muestra el reposacabezas 1 en posición activa y con los medios de bloqueo enganchados en el resalte 21 del soporte fijo 3. Se observa que es el saliente 22 de los medios de enganche 24 el que se enclava en dicho resalte 21. Cuando, una vez enganchados los medios de bloqueo, el reposacabezas 1 es devuelto a la posición de reposo, las prolongaciones 25 son empujadas por el eje de impulsión 10, liberando dichos medios de enganche 24 del resalte 21 y haciendo que el reposacabezas 1 vuelva a su posición de reposo original.Figure 6 shows the headrest 1 in active position and with the locking means engaged in the shoulder 21 of the fixed support 3. It is observed that it is the projection 22 of the hooking means 24 that engages in said shoulder 21. When, once the locking means are engaged, the headrest 1 is returned to the rest position, the extensions 25 are pushed by the drive shaft 10, releasing said engaging means 24 from the shoulder 21 and causing the headrest 1 to return to its position of original rest.
Gracias a los medios de rearme manual descritos, cuando el reposacabezas 1 pasa a la posición activa, el usuario del vehículo no necesita acudir al taller para volver a colocar dicho reposacabezas 1 en la posición de reposo. Thanks to the manual reset means described, when the headrest 1 goes into the active position, the vehicle user does not need to go to the workshop to return said headrest 1 to the rest position.

Claims

R E I V I N D I C A C I O N E S
1.- Reposacabezas para asientos de vehículos automóviles, que comprende un soporte fijo (3) posterior, un soporte móvil (5) anterior desplazable con respecto a dicho soporte fijo (3) , medios de accionamiento para desplazar dicho soporte móvil (5) desde una posición de reposo a una posición activa del reposacabezas (1) , y al menos un brazo basculante (7) unido en un extremo al soporte fijo (3) y unido en el otro extremo al soporte móvil (5), provocando los medios de accionamiento que dicho brazo basculante (7) pivote cuando son accionados y provocándose con dicho pivotamiento el desplazamiento de dicho soporte móvil (5) desde la posición de reposo hasta la posición activa, caracterizado porque el brazo basculante (7) comprende un sector dentado (18) y el reposacabezas (1) comprende medios de bloqueo que comprenden al menos un brazo de bloqueo (19) que está unido por un primer extremo al soporte móvil (5) con posibilidad de giro y que está apoyado en un segundo extremo sobre el sector dentado (18), cooperando dicho segundo extremo con dicho sector dentado (18) para impedir el retroceso de dicho soporte móvil (5) hacia la posición de reposo cuando los medios de accionamiento provocan el desplazamiento de dicho soporte móvil (5) a la posición activa.1. Headrest for seats of motor vehicles, comprising a fixed rear support (3), a movable front support (5) movable with respect to said fixed support (3), drive means for moving said mobile support (5) from a resting position to an active position of the headrest (1), and at least one swing arm (7) attached at one end to the fixed support (3) and attached at the other end to the mobile support (5), causing the means of drive that said swing arm (7) pivots when they are actuated and with said pivot causing the movement of said mobile support (5) from the rest position to the active position, characterized in that the swing arm (7) comprises a toothed sector (18 ) and the headrest (1) comprises locking means comprising at least one locking arm (19) that is connected by a first end to the mobile support (5) with the possibility of rotation and which is supported by a second end so on the toothed sector (18), said second end cooperating with said toothed sector (18) to prevent the backing of said mobile support (5) towards the rest position when the drive means cause the movement of said mobile support (5) to the active position.
2.- Reposacabezas según la reivindicación 1, caracterizado porque los medios de bloqueo comprenden medios de rearme manual que comprenden, al menos una maneta (23) para liberar el brazo de bloqueo (19) del sector dentado (18) cuando el soporte móvil (5) está en la posición activa, y medios de enganche (24) elásticos para enganchar los medios de bloqueo en un resalte (21) dispuesto en el soporte móvil (5) mediante el desplazamiento de dichos medios de bloqueo hacia dicho soporte móvil (5), liberándose dichos medios de enganche (24) de dicho resalte (21) cuando el soporte móvil (5) es desplazado a la posición de reposo.2. Headrest according to claim 1, characterized in that the locking means comprise manual reset means comprising at least one handle (23) for releasing the locking arm (19) from the toothed sector (18) when the mobile support ( 5) is in the active position, and elastic hooking means (24) for engaging the locking means on a shoulder (21) arranged in the mobile support (5) by moving said locking means towards said mobile support (5), said engaging means (24) being released from said shoulder (21) when the mobile support (5) is moved to the rest position.
3.- Reposacabezas según la reivindicación 2, caracterizado porgue los medios de accionamiento comprenden un electroimán (6) fijado al soporte fijo (3), y un empujador (6a) que se separa del electroimán (6) cuando dicho electroimán (6) es alimentado, estando unido dicho empujador (6a) a un eje de impulsión (10) transversal, el reposacabezas (1) comprende dos brazos basculantes (7), estando cada uno de dichos brazos basculantes (7) unido a un lado del eje de impulsión (10) , y los medios de bloqueo comprenden dos brazos de bloqueo (19) , estando cada brazo de bloqueo (19) apoyado en el sector dentado (18) del brazo basculante (7) correspondiente .3. Headrest according to claim 2, characterized in that the actuating means comprise an electromagnet (6) fixed to the fixed support (3), and a pusher (6a) that separates from the electromagnet (6) when said electromagnet (6) is fed, said pusher (6a) being attached to a transverse drive shaft (10), the headrest (1) comprises two swing arms (7), each of said swing arms (7) being attached to one side of the drive shaft (10), and the locking means comprise two locking arms (19), each locking arm (19) being supported on the toothed sector (18) of the corresponding swing arm (7).
4.- Reposacabezas según la reivindicación 3, caracterizado porque los medios de bloqueo comprenden un eje transversal (26) que une ambos brazos de bloqueo (19), estando los medios de enganche (24) fijados a dicho eje transversal (26) .4. Headrest according to claim 3, characterized in that the locking means comprise a transverse axis (26) that joins both locking arms (19), the engagement means (24) being fixed to said transverse axis (26).
5. - Reposacabezas según cualquiera de las reivindicaciones 3 o 4, caracterizado porque la maneta (23) está fijada a uno de los extremos del eje transversal (23) .5. - Headrest according to any of claims 3 or 4, characterized in that the handle (23) is fixed to one of the ends of the transverse axis (23).
6.- Reposacabezas según cualquiera de las reivindicaciones 3 a 5, caracterizado porque los medios de enganche (24) elásticos comprenden al menos una prolongación (25) que es empujada por el eje de impulsión (10) cuando el reposacabezas (1) es devuelto a la posición de reposo, liberando dichos medios de enganche (24) del resalte (21) . 6. Headrest according to any of claims 3 to 5, characterized in that the elastic coupling means (24) comprise at least one extension (25) which is pushed by the drive shaft (10) when the headrest (1) is returned to the rest position, releasing said engagement means (24) from the shoulder (21).
PCT/ES2007/070188 2006-12-05 2007-11-15 Headrest for automobile vehicle seats WO2008068372A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200602636U ES1064266Y (en) 2006-12-05 2006-12-05 REPLACEMENT HEADS FOR MOTOR VEHICLE SEATS
ESU200602636 2006-12-05

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