DE3816168C1 - Head restraint for motor-vehicle seats - Google Patents

Abstract

A head restraint for motor-vehicle seats has a padded support which is held on a seat back and represents an annularly closed frame. The padded support has fitted around it, leaving a central see-through opening, a padded foam body having two padded parts. The padded support has a trough channel which is open radially outwards. This trough channel has holding recesses which are open radially outwards over the circumference of the padded support. Projections of the padded parts, which projections can be folded back outwards in the radial direction in a resilient manner into in each case one bending point, engage positively in these recesses in a self-clamping and self-locking manner. Each padded part fits behind the padded support by means of an annularly closed, collar-shaped extension which frames the see-through opening.

Description

The invention relates to a headrest for motor vehicles witness seats as they correspond to the preamble of the patent pronouncement 1 through public prior use is.

Regarding the obvious prior use, reference is made taken on a under the name "panorama headrest" the Eugen O. Butz EOB automobile parts and accessories GmbH, 5650 Solingen 11, headrest distributed before the filing date, which is also the subject of drawing E 2220 "frame cover 2 parts "from June 8, 1977.

The frame-shaped cushion support of the known head support surrounds a plastic material that is uniform with it Window pane. The cushion body or the frame cover consist of two integral in the known frame headrest foam upholstery parts, so no separate cover need. The upholstery support has the upholstery on both sides body parting plane extending perpendicular to this Trough walls and transverse walls connecting them to one another. One of the two foam pad parts has a hinge elastically foldable individual projections on which Intervene in the trough-side holding recesses. However, these are only on the arched area of the frame headrest, not but provided on the lower crossbar.

The other upholstered part of the well-known frame headrest encloses the cushion carrier with a in the direction of travel or Holding groove open across the division plane. Both upholstery parts are divided by a variety of perpendicular to each other level extending, outside the cushion support in both Holding pins engaging upholstery parts held together.  

The assembly of the frame cushion of the known headrest is very labor intensive.

Starting from the above through obvious The frame headrest that has become known is the Invention the task of having a frame headrest an easy to assemble and easy to manufacture To create upholstered body. This task was made accordingly the characterizing part of claim 1 solved.

According to the invention, each individual cushion part surrounds the cushion carrier approximately in the manner of a tire, which, however, is positively secured against radial and axial withdrawal with additional - but body-own a piece connected - means. This happens once (against radial withdrawal) through the collar-shaped approach, which grips behind the cushion carrier from the inside. In addition (against radial and axial deduction), this is done by the projections (also in the form of individual projections) which engage radially from the outside in the holding recess or the holding recesses and which only act against an elastic restoring force (due to the elastic deformation at the bending point of the respective upholstery part) can be folded out of the retaining savings. A particularly tight fit of each upholstery part can be achieved in that the upholstery part has an undersize in relation to the upholstery carrier in the radial direction, that is to say - approximately like the aforementioned tire - encloses the upholstery carrier with a ring tension that contracts the upholstery body radially inwards.

In a special embodiment of the invention lock two opposite projections of the two poles parts against each other automatically. This happens in such a way that each head start or individual head start is one in the division  has a flat, radially extending support surface, which preferably under tension (compression) of the together acting projections each tired of a corresponding one Support surface of the adjacent projection of the other Upholstered part of the upholstery.

A lock that is very resistant to pull-off forces The upholstery parts on the upholstery support will be adjusted accordingly achieved further features of the invention in that the Bending point of the individual projections of each upholstery part, for example radially outside of the narrow free end of the adjacent ten trough side wall is arranged.

Additional locking forces are brought about by that the trough walls have one each at their narrow free ends Form thickening, which in one of the profile thickening shape-matched undercut inside annular recess tion of the associated upholstery part engages.

The headrest according to the invention is useful together with a cushion covering the cushion body train used. For this purpose form one cushion part or both poles Sterst together outside, namely on or adjacent to the Tei level, a radially outward open the cushion body approximately equatorial surrounding groove for receiving Haltemit for the attachment of reference edges.

Such holdings tel can be found in DE-PS 37 11 498 as known in the sense of § 3 (2) Pat G.

Overall, the invention also eliminates all problems bypassed themselves in the manufacture of the closed  result in its one-piece foam padding. With the invention a frame headrest has been created, the upholstery parts optionally made in open shapes can be and thus a visually perfect surface without voids and sink marks.

In the drawings, the invention is based on a be preferred embodiment shown in more detail. Show it,

Fig. 1 shows a vertical radial section through a frame headrest for motor vehicle seats, in which all the parts provided for holding the headrest on the seat back, such as handrails and tilt or height adjustment devices, are omitted.

FIG. 2 shows the same headrest according to FIG. 1, but in a vertical radial section through the same holding recess, which is offset circumferentially from the representation in FIG. 1, above the paper plane.

In the drawings, a frame headrest for motor vehicle seats is generally designated by the reference number 10 .

The headrest 10 has a cushion support 11 made of plastic injection molding, which is an annular closed frame.

The pad carrier 11 is 12 and 13 having one of two cushion parts foam cushion body 14 gripped while leaving a central viewing aperture 15 °.

The cushion support 11 is profiled on one side approximately trough-like. The trough channel 16, which is open to the outside in the radial direction R, is divided by means of trough bottom 17 and lateral trough walls 18 , 19 into crosspieces 20, which are connected to one another in a material-uniform manner, into chamber-like holding recesses 21 distributed over the circumference of the cushion support 11 .

Depending on the expediency, individual projections 23 , 24 of both cushion parts 12 , 13 engage in all or in individual holding recesses 21 around an approximately joint-like bending point 22 against a restoring force. The elastic resistance when folding back the jumps 23 , 24 is due to the bending of the cushion foam at the 22nd

For the rest, it is sufficient for fastening the frame cushion 14 to the cushion carrier 11 to provide holding recesses 21 and corresponding projections 23 , 24 only in the upper and lower horizontal frame web.

The parting plane of the cushion body 11 is marked with a dash-dot line and designated by T. The division plane T extends parallel to a plane defined by the frame circumference U.

The individual projections 23, 24 are arranged oppositely about in the radial direction R inside each cushion part-side collar-shaped extensions 25, 26 which of the cushion support 11 fed enclosing engage behind the trough bottom 17 and which together menstoßen with radial surfaces 27, 28 in the parting plane T. The radial surfaces 27 , 28 can also be provided in the manner of a circumferential tongue and groove connection or, alternatively, with molded male and female moldings in the same manner as the material.

Each individual projection 23 , 24 also has a radially extending support surface 29 , 30 extending in the division plane T , each of which fits snugly against a corresponding support surface 30 or 29 of the respective other upholstery part 13 or 12 . Here, the mutually abutting projections 23 , 24 compress each other, so that the projections 23 , 24 are within their locking position under a transverse to the parting plane T pressure bias. In this way, there is a strong self-locking effect of the respective adjacent projections 23 , 24 .

From the drawings it can also be seen that the bending places 22 of the individual projections 23 , 24 of each cushion part 12 , 13 approximately radially in the direction R outside the respective narrow end 31 , 32 of the associated trough wall 18 , 19 are present. The trough walls 18 , 19 form at their narrow free ends 31 , 32 a Profilver thickening 33 , 34th The profile thickening 33 , 34 engages in a form-analogous undercut internal annular recess 35 , 36 of the associated cushion part 12 , 13 in a form-fitting manner. These undercuts additionally secure the locking of the projections 23 , 24 against one another, especially when the projections 23 , 24 are subject to the pressure prestress described above.

The upholstery part 12 has on the outside, namely adjacent to the division plane T , a radially outward open, the Pol sterkörper 14 approximately equatorial surrounding groove 37 for receiving holding means, not shown, for fastening the only partially indicated upholstery cover 38 .

Claims (10)

1. Headrest for motor vehicle seats, with an upholstery support held on a seat back and forming a ring-shaped closed frame, which is encompassed by a foam upholstery body having two upholstery parts while leaving a central viewing opening, the upholstery support being profiled approximately trough-shaped at least on one side and the one open to the outside Forming trough bottom and trough walls at least one holding recess or holding recesses distributed over the circumference of the upholstery support, in which at least one projection which can be folded back by a bending point against an elastic restoring force engages in a form-fitting manner and the dividing plane of the upholstered body parallel to one laid through the frame circumference Level runs, characterized in that the narrow-sided free ends ( 31 , 32 ) of the trough walls ( 18 , 19 ) point approximately radially (at R) to the outside, that each cushion part ( 12 , 13 ) the cushion door the handle ( 11 ) with a ring-shaped, closed, collar-shaped extension ( 25 , 26 ) surrounding the viewing opening ( 15 ) and with a projection ( 23 , 24 ) opposite the collar-shaped extension ( 25 , 26 ) in the radial direction ( R ) engages essentially radially (at R) from the outside in the holding recess ( 21 ). 2. Headrest according to claim 1, characterized in that each projection ( 23 , 24 ) has a in the division plane ( T ) extending radially (at R) extending support surface ( 29 , 30 ), each of which is full of a likewise radially extending corresponds to the corresponding support surface ( 30 , 29 ) in a locking manner. 3. Headrest according to claim 2, characterized in that the corresponding radial support surface of a geson derten protruding radially (at R) protruding from the trough bottom ( 17 ) is formed the trough wall. 4. Headrest according to claim 2, characterized in that the corresponding radial support surface ( 30 , 29 ) from the adjacent projection ( 23 , 24 ) of the respective other cushion part ( 13 or 12 ) is formed. 5. Headrest according to one of claims 1 to 4, characterized in that each projection ( 23 , 24 ) with its radia len support surface ( 29 , 30 ) with compressive bias on the correspon- ding radial support surface ( 30 , 29 ) bears in a locking manner. 6. Headrest according to one of claims 1 to 5, characterized in that the retaining recesses by means of radially (at R) extending, uniformly on the upholstery support ( 11 ) connected crossbars ( 20 ) in itself over the circumference of the cushion support ( 11 ) distributing individual Halteaus savings ( 21 ) and each projection are divided into themselves over the circumference of the associated cushion part ( 12 , 13 ) distributing individual projections ( 23 , 24 ). 7. Headrest according to one of claims 1 to 6, characterized in that the bending point ( 22 ) of the projections ( 23 , 24 ) of each cushion part ( 12 , 13 ) approximately radially (R) outside half of the narrow-side free end ( 31 , 32nd ) the associated trough wall ( 18 , 19 ) is arranged. 8. Headrest according to claim 7, characterized in that the trough walls ( 18 , 19 ) each form a thickened section ( 33 , 34 ) at their narrow-side free ends ( 31 , 32 ) which in an undercut-like inner recess ( 35 , 36 ) of the associated cushion part ( 12 , 13 ) engages in a form-fitting manner. 9. Headrest according to one of claims 1 to 8, characterized in that one upholstery part ( 12 ) or both upholstery parts ( 12 , 13 ) together on the outside, at or adjacent to the parting plane ( T ), a radial (at R) open to the outside the upholstery body ( 14 ) approximately equatorial surrounding groove ( 37 ) for receiving holding means for the attachment of cover edges. 10. Headrest according to one of claims 1 to 9, characterized in that the projections ( 23 , 24 ) and the Halteaus savings ( 21 ) are only seen in the upper and lower frame area.