Head Rest Release Mechanism
The invention is a head rest actuation system which is activated by forces acting upon a seat back or devices within a seat back. Forces acting upon a seat back or lumbar devices within a seat back are transmitted to a head rest and provide and actuating force therefor.
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This Application claims priority of provisional application No. 60/890,451 filed Feb. 16, 2007 and provisional application No. 60/805,016 filed Jun. 16, 2006.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCHNot Applicable.
APPENDIXNot Applicable.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates to head rests and, more specifically, to actuating head rests.
2. Related Art
Currently, many head rests move up and down and rotate backwards and forwards for varied reasons including comfort, convenience and safety. In many instances a user must move the headrest to a desired position manually, by holding down a button, or by pressing a switch. In many instances it desirable to provide automatic actuation of a headrest to a desired position.
SUMMARY OF THE INVENTIONThe invention provides for actuation of a headrest to a desired position. The disclosed system provides for transmission of forces acting upon the body of a seat to a headrest. The transmitted force is utilized to actuate the headrest into a desired position.
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
According to the various exemplary embodiments set forth below, a force is applied either to a main seat body 24 or at a location within the main seat body 24 and is transmitted to a head rest 20. The transmitted force preferably actuates the head rest 20 causing it to move to a position that is beneficial to a user or occupant of the seat.
According to a first embodiment of the invention shown in
A termination block (not shown) is preferably situated within the cable terminal 26. Each of the four Bowden cables 28, 30, 32, 50 connected to the cable terminal 26 comprise a termination bullet (not shown) that is disposed in a hole in the termination block. The termination block may be provided with a track that compliments a track within cable terminal for traveling longitudinally within cable terminal 26. The termination block is preferably provided with thirty-five (35) millimeters of longitudinal travel within cable terminal.
The folding seat Bowden cable 32 is terminated at another end at a stationary point 34. It will be appreciated that the stationary point 34 may be located at numerous points outside of a back portion of the main seat body 24. The stationary point 34 is selected such that when, the back portion of the main seat body 24 is pivoted from a vertical position to a folded, horizontal position, distance between the stationary point 34 and the folding seat Bowden cable conduit 36 is increased. In this manner tension is applied to the folding seat Bowden cable wire 38 when the seat is folded down.
As a result, the termination block within cable terminal 26 is pulled towards the folding seat Bowden cable 32, and is pulled away from head rest Bowden cable 50, first bolster Bowden cable 28, and second bolster Bowden cable 30. As the cable terminal 26 end of the head rest Bowden cable 50 is pulled, the other end of the head rest release Bowden cable 50 actuates the head rest 20. Similarly the first and second bolster Bowden cables 28, 30 provide an actuating force to first and second lateral bolsters 40, 42. It is within the scope of the invention that multiple other Bowden cables could be attached to the cable terminal 26 and used to actuate other devices, such as a lumbar support in a similar manner.
Preferably the head rest 20 end of the head rest Bowden cable 50 is attached to a latch mechanism in head rest (not shown). The latch mechanism may release the head rest 20 to assume a folding forwards position or a folding backwards position. There may also be combined a telescoping release function wherein the head rest is released from its extended telescoped position in conjunction with either folding forwards or folding backwards.
The head rest latch mechanism may operate in numerous ways. In one embodiment, the latch mechanism may release a wound coil spring. Releasing the wound coil spring will allow the spring to unwind and to torque the head rest into either a folding forwards position or a folding backwards position. The spring may be re-wound by the raising of the seat back frame to the upright position.
Alternatively, when the head rest Bowden cable 50 is pulled, the head rest end of the head rest Bowden cable 50 may pull the head rest 20 towards a folding forwards position or a folding backwards position. Preferably, a spring opposes the folding motion of the headrest such that when the back portion of the main seat body is returned from a folded, horizontal position to a vertical position and the tension on the head rest Bowden cable 50 is reduced, the spring returns the head rest 20 to an unfolded, upright position.
According to a second embodiment of the present invention illustrated in
Preferably the Bowden cable 230 is arranged as shown in
Third through sixth embodiments of the present invention, as illustrated in
Although the third through sixth embodiments are illustrated in conjunction with the described lumbar support device, the disclosed mechanisms for actuating a head rest 20 could be used in conjunction with numerous devices located within the back of a seat. Accordingly, the scope of the present invention is not limited to the use of the disclosed mechanisms for actuating a head rest in conjunction with the lumbar support device described above.
According to the third embodiment of the present invention illustrated in
When a severe load is applied to the basket 330, such as in the case of a collision from behind, the basket 330 will flatten and the hinge wire 360 may be drawn towards the guide wire 330. As the hinge wire 360 draws closer to the guide wire 330, the hinge plate 362 will slide away from the kickstand plate 372. As the distance between the two plates increases, the head rest Bowden cable wire 54 will be pulled away from the terminal of the head rest Bowden cable conduit 52 and the tension in the head rest Bowden cable wire 54 will increase. The increased tension in the head rest Bowden cable wire 54 preferably actuates the head rest 20, drawing it closer to the head of an occupant of the seat.
According to the fourth embodiment of the present invention, illustrated in
When a severe load is applied to the basket 330, such as in the case of a collision from behind, the basket 330 will flatten and the hinge wire 460 may be drawn towards the guide wire 332. As the hinge wire 460 draws closer to the guide wire, the arcuate springs 450 flatten, causing the upper and lower sliders 452, 454 to separate from one another, thereby increasing the tension in the head rest Bowden cable wire 54. The increased tension in the head rest Bowden cable wire 54 preferably actuates the head rest 20, drawing it closer to the head of an occupant of the seat.
According to the fifth embodiment of the present invention, illustrated in
According to this embodiment the head rest Bowden cable conduit 52 is attached to the lower portion of the guide wire 332 and the head rest Bowden cable wire 54 is attached to the housing 524. When a severe load is applied to the basket 330, the lower portion of the guide wire 332 and the bar 520 are pushed in the direction of the applied force, along the arcuate channel 522 within the housing 524. As this occurs, the distance between the point at which the head rest Bowden cable conduit 52 is attached to the lower portion of the guide wire 332 and the point at which the head rest Bowden cable wire 54 is attached to the housing 524 is increased. Accordingly, the tension in the head rest Bowden cable wire 54 is increased and is preferably used to actuate the head rest 20. Preferably, the head rest 20 is drawn towards the head of an occupant of the seat.
According to the sixth embodiment of the present invention, as illustrated in
According to this embodiment, the head rest Bowden cable conduit 54 is attached to a bracket 626 on the guide wire 332. The bracket 626 is preferably placed to allow the full range of vertical movement of the basket 330. The Bowden cable wire 54 is attached to the end of the cam 620 that is connected to the outer portion of the torsion spring 624. When a severe load is applied to the basket 330, the load is transmitted to the lower portion of the guide wire 332, which is then displaced in the direction of the applied force, causing the cam 620 to rotate. As the cam 620 rotates, it pulls the head rest Bowden cable wire 54 away from the head rest Bowden cable conduit 52, thereby increasing the tension in the head rest Bowden cable wire 54. The increased tension in the head rest Bowden cable wire 54 preferably actuates the head rest 20, drawing it closer to the head of an occupant of the seat.
Seventh and eighth embodiments of the present invention, as illustrated in
Although the seventh and eighth embodiments are illustrated in conjunction with the described lumbar support device, the disclosed mechanisms for actuating a head rest 20 could be used in conjunction with numerous devices located within the back of a seat. Accordingly, the scope of the present invention is not limited to the use of the disclosed mechanisms for actuating a head rest in conjunction with the lumbar support device described above.
According to the seventh embodiment of the present invention, illustrated in
According to this embodiment, the head rest Bowden cable conduit 52 is preferably fixed with respect to the slider 782, and the head rest Bowden cable wire 54 is preferably fixed with respect to the end of the kickstand wire 770 engaged with the slider housing 780. When a severe load is applied to the basket 730, such as in the case of a collision from behind, the basket 730 will flatten and the guide wire 732 will be pressed towards the slider housing 780. Accordingly, the slider 782 will be pressed away from the kickstand wire 770, thereby increasing the distance between the head rest Bowden cable wire 54 and the head rest Bowden cable conduit 52, which increases tension in the Bowden cable wire 54. The increased tension in the head rest Bowden cable wire 54 preferably actuates the head rest 20, drawing it towards the head of an occupant of the seat.
According to the eighth embodiment of the present invention illustrated in
According to this embodiment, the head rest Bowden cable conduit 52 is attached to one of the sliding members 822, 824 and the head rest Bowden cable wire 54 is attached to the other sliding member 822, 824. When a severe load is applied to the basket 730, the basket 730 will flatten and the arcuate spring 820 may flatten. Accordingly the first and second sliding members 822, 824 will be pressed away from each other and tension on the head rest Bowden cable wire 54 will be increased. The increased tension on the head rest Bowden cable wire 54 preferably actuates the head rest 20 such that the head rest moves towards the head of an occupant of the seat.
According to a ninth embodiment of the present invention illustrated in
The bladder lumbar support 920 is preferably connected to a passageway 924 between the bladder lumbar support 920 and a head rest actuator mechanism. According to this embodiment, when a severe load is applied to the bladder lumbar support 920, the pressure of the fluid inside the bladder lumbar support 920 and the passageway increases 924. The increased pressure of the fluid drives the actuation mechanism and thereby preferably actuates the head rest 20 such that the head rest 20 moves towards the head of an occupant of the seat.
As various modifications could be made to the exemplary embodiments, as described above with reference to the corresponding illustrations, without departing from the scope of the invention, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.
Claims
1. A head rest actuation system comprising:
- a seat back pivotable between an upright position and a folded horizontal position;
- a first Bowden cable having a conduit and a wire;
- a head rest having an operative position and a folded position;
- wherein an end of the first Bowden cable wire is fixed to a point remote from the seat back;
- wherein tension in the first Bowden cable wire is increased when said seat back pivots from the upright position to the folded horizontal position; and
- wherein the increase in the tension of the first Bowden cable wire actuates the head rest from the operative position to the folded position.
2. An actuation system according to claim 1 further comprising:
- a cable terminal connected to said first Bowden cable;
- a cable termination block disposed in said cable terminal, said cable termination block having a first end and a second end, said cable termination block at one of said first end and said second end being connected to said first Bowden cable;
- a second Bowden cable connected to the other one of said first end and said second end of said cable termination block, said second Bowden cable being further connected to a head rest actuation mechanism.
3. A head rest actuation system comprising:
- a seat;
- a lumbar support basket;
- a Bowden cable having a wire and a conduit;
- a head rest;
- an actuator in operative communication with the Bowden cable wire such that when the actuator increases tension in the Bowden cable wire, the lumbar support basket is pulled towards an occupant of the seat; and
- wherein a force applied against the lumbar support basket causes the Bowden cable to actuate the head rest towards the head of the occupant of the seat.
4. A head rest actuation system comprising:
- a head rest;
- a guide wire;
- a lumbar support basket slidably connected to the guide wire;
- a Bowden cable having a wire and a conduit;
- wherein a force applied to the lumbar support basket creates tension in the Bowden cable wire; and
- wherein the tension in the Bowden cable wire provides an actuating force to the head rest.
5. The actuation system of claim 4 further comprising:
- a hinge wire slidably connected to the guide wire, wherein a lower portion of the lumbar support basket is slidably connected to the hinge wire;
- a kickstand wire hingedly connected to the hinge wire and slidably connected to the guide wire;
- a spring fixed on a first end at the sliding connection of the kickstand wire and the guide wire and fixed at a second end at the sliding connection of the hinge wire and the guide wire;
- wherein the Bowden cable conduit has a terminal fixed with respect to the sliding connection of the hinge wire and the guide wire; and
- wherein the Bowden cable wire has a terminal fixed with respect to the sliding connection of the kickstand wire and the guide wire.
6. The actuation system of claim 4 further comprising:
- a hinge wire hingedly attached to the guide wire, wherein a lower portion of the lumbar support basket is slidably connected to the hinge wire;
- a substantially arcuate spring having a midpoint slidably attached to the hinge wire, a first end attached to a first slider, and a second end attached to a second slider;
- wherein the Bowden cable conduit has a terminal attached to the first slider and the Bowden cable wire has a terminal attached to the second slider.
7. The actuation system of claim 4 further comprising:
- a housing;
- a torsion spring having a center and an outer portion, wherein the center is attached to the housing and the outer portion is attached to a lower portion of the guide wire;
- wherein the Bowden cable wire has a terminal attached to the housing and the Bowden cable conduit has a terminal attached to the lower portion of the guide wire.
8. The actuation system of claim 4 further comprising:
- a torsion spring having a center and an outer portion, wherein the center is fixed with respect to a seat frame;
- a cam rotating substantially about the center of the torsion spring and having a first and second end; wherein the first end is attached to a lower portion of the guide wire and the second end is attached to the outer portion of the torsion spring;
- wherein the Bowden cable conduit has a terminal attached to the guide wire and the Bowden cable wire has a terminal attached to the second end of the cam.
9. The actuation system of claim 4 further comprising:
- a hinge wire hingedly connected to the guide wire and hingedly connected to a slider;
- a kickstand wire hingedly attached to the guide wire;
- a housing having a channel, wherein the kickstand wire is hingedly attached to the housing and the slider is slidingly engaged in the channel;
- wherein the Bowden cable conduit has a terminal fixed with respect to the slider and the Bowden cable wire has a terminal fixed with respect to the housing.
10. The actuation system of claim 4 further comprising:
- a substantially arcuate spring fixed to a lower portion of the guide wire at a midsection of the spring, fixed to a first slider at a first end of the spring, and fixed to a second slider at a second end of the spring;
- a frame crossmember having a first and second channel, wherein the first slider is sliding engaged in the first channel and the second slider is slidingly engaged in the second channel;
- wherein the Bowden cable conduit has a terminal fixed with respect to the first slider and the Bowden cable wire has a terminal fixed with respect to the second slider.
11. A head rest actuation system comprising:
- a head rest actuator;
- a lumbar support bladder filled with a fluid having a passageway to the head rest actuator, wherein an increase in the pressure of the fluid provides and actuating force to the head rest actuator.
Type: Application
Filed: Jun 18, 2007
Publication Date: Jan 10, 2008
Applicant: SCHUKRA OF NORTH AMERICA (Tecsumeh, ON)
Inventors: Robert McMillen (Tecsumeh), Renato Colja (Windsor), Stephen Certossi (Belle River), Jeremie Gobbo (Windsor), Larry Janzen (Harrow), Horia Blendea (LaSalle), Isa Rosli (Windsor)
Application Number: 11/764,628
International Classification: A47C 1/10 (20060101);