Further advantages and details emerge from the description below of exemplary embodiments. In the drawings:
FIG. 1 shows a cross section through an exemplary embodiment of a vehicle seat of a motor vehicle in a simplified schematic illustration,
FIG. 2 shows an exemplary embodiment of a back panel for the backrest of a vehicle seat according to FIG. 1 in a perspective illustration,
FIG. 3 shows the back panel according to FIG. 2 in a plan view,
FIG. 4 shows the back panel according to FIG. 2 in an exploded illustration,
FIG. 5 shows a partial illustration of the back panel according to FIG. 2 in a rear view,
FIG. 6 shows a partial illustration of the illustration according to FIG. 5,
FIG. 7 shows a cross section through an exemplary embodiment of a padding channel,
FIG. 8 shows an exemplary embodiment of a method for producing a backrest for a vehicle seat of a motor vehicle,
FIG. 9 shows a cross section through a further exemplary embodiment of a padding channel, and
FIG. 10 shows a cross section through a further exemplary embodiment of a padding channel.
FIG. 1 shows an exemplary embodiment of a cross section through an exemplary embodiment of a vehicle seat 1 of a motor vehicle in a simplified schematic illustration. The vehicle seat 1 comprises a seat part 2 and a backrest 3. The backrest 3 comprises padding 4 and a rear panel 5 arranged behind the padding 4. The padding 4 is surrounded at least partially by a cover (not illustrated), for example made of leather, imitation leather, a textile or another customary material. A lining 6, such as, for example, a cover, may be provided behind the rear panel 5. The backrest 3 may comprise a frame (not illustrated) which is connected to the rear panel 5. Examples of frames of this type are disclosed, for example, in DE 10 2005 005 485, DE 20 2004 019 560 U1 and DE 101 42 981 A1. In addition, the vehicle seat 1 comprises a head restraint (not illustrated). The elements in FIG. 1 are shown with consideration for simplicity and clarity and not necessarily true to scale. Thus, for example, the sizes of some of the elements in FIG. 1 are exaggerated in comparison to other elements in order to improve the understanding of the exemplary embodiment.
FIG. 2 shows an exemplary embodiment of the back panel 5 in a perspective illustration, FIG. 3 shows the back panel 5 in a plan view, and FIG. 4 shows the back panel in an exploded illustration. The back panel 5 comprises a rolled base plate 10 and a pressed side part 11 which is welded to the base plate 10. That side of the side part 11 which faces away from that side of the side part 11 which is connected to the base plate is matched to the contour 50 of a wheelhouse and/or chassis of the motor vehicle. In this case, the side part 11 is advantageously configured in such a manner that its width in the transverse direction of the motor vehicle varies by at least 20%. In the exemplary embodiment illustrated, the width of the side part 11 in the transverse direction of the motor vehicle varies by 45%, i.e. the smallest width of the side part 11 is 55% of the greatest width of the side part 11. The area of the base plate 10 is at least twice as large as the area of the side part 11.
Profiles or beads 21—which are formed by the rolling of the base plate 10—and which run in the transverse direction of the motor vehicle are formed in the base plate 10. Profiles 24 corresponding to the profiles or beads 21 are formed in the side part 11. In addition, a profile 25 which runs essentially vertically and essentially orthogonally to the profiles or beads 21 and is configured in the manner of a hat profile is formed in the side part 11.
In an advantageous refinement, the side part 11 is composed of a material having lower tensile strength than the material of the base plate 10. In a further advantageous refinement, the base plate 10 is composed of a steel with a tensile strength of at least 800 N/mm2. In a further advantageous refinement, the sheet-metal thickness of the side part 11 is greater than the sheet-metal thickness of the base plate 10. In a further advantageous refinement, the base plate 10 is configured symmetrically in such a manner that a side part corresponding to the side part 11 can be welded either on the left or right to a corresponding base plate 10.
A padding channel 111 for the fastening of the padding 4 and/or of a cover is formed in part of the edge of the side part 11 and borders the side part 11 on three sides. A respective padding channel 102 and 101 for the fastening of the padding 4 and/or of a cover is likewise formed in the upper and the lower edge of the base plate 10. On that side of the base plate 10 which faces away from the side part 11, the back panel 5 comprises a profile support 12 which is configured as a hat profile, is welded to the base plate 10 and comprises a padding channel 121 for the fastening of the padding 4 and/or of a cover.
FIG. 5 shows a partial illustration of the back panel 5 in a rear view in the region of the padding channel 101, and FIG. 6 shows a partial illustration of the illustration according to FIG. 5. FIG. 7 shows a cross section through the padding channel 101. The padding channel 101 comprises a plurality of tabs 1011, 1012, 1013, 1014, 1015 which are punched into a side wall S of the padding channel 101 and are bent into the padding channel 101 in such a manner that they protrude into the padding channel 101 and increasingly narrow it in one section V or in some sections in its longitudinal direction. In the exemplary embodiment illustrated, it is provided that the tabs 1011, 1012, 1013, 1014, 1015 extend as far as an opening O on the longitudinal side of the padding channel 101. The padding channels 102 and 121 may be configured in a corresponding manner.
FIG. 8 shows an exemplary embodiment of a method for producing the vehicle seat 1 and a method for producing a backrest for a vehicle seat of a motor vehicle, such as, for example, the backrest 5. In this case, the side part is pressed in a step 40. In a step 41 for producing the base plate 10, a steel band is rolled, with the padding channels 101, 102 and also the beads 21 being formed in the steel band and therefore in the later base plate 10 by rolling. In addition, the tabs 1011, 1012, 1013, 1014, 1015 are punched into the side wall S of the padding channel 101 and bent into the padding channel 101. Step 41 is followed by step 42 in which the base plate 10 is cut off from the rolled steel band. However, provision may also be made for the padding channels 101, 101A, 102 to merely be preformed during the rolling operation and to be shaped subsequently, if appropriate after the cutting operation, into their final shape.
A step 43 follows, in which the base plate 10 and the side part 11 are welded, screwed or riveted to each other to form a back panel 5. Furthermore, the profile support 12 is welded to the base plate 10. In order to produce a back panel for a backrest which is not divided or is not dividable, it is advantageously provided that, instead of the profile support 12 provided with a padding channel 121, a side part corresponding to the side part 11 (but “mirror-inverted”) is welded, screwed or riveted to the base plate 10. If appropriate, a frame is welded to the back panel 5. Step 43 is followed by a step 44, in which the back panel 5 is upholstered, with a cover being fastened or retained in the padding channels 101, 102, 111, 121, in particular with the use of the tabs 1011, 1012, 1013, 1014, 1015. The method described may also be used, with the use of the advantageously configured padding channel 101, for the padding of the seat part 2.
FIG. 9 and FIG. 10 show cross sections through further exemplary embodiments of base plates 10A and 10B with padding channels 101A and 101B configured in an alternative manner to the padding channel 101. The padding channels 101A and 101B likewise each have a plurality of tabs 1011A and 1011B which are punched into a side wall and bent into the padding channel 101A and 101B, protrude into the padding channel 101A and 101B and increasingly narrow said padding channel 101A and 101B at least in some sections in its longitudinal direction.
LIST OF DESIGNATIONS
1 Vehicle seat
2 Seat part
3 Backrest
4 Padding
5 Back panel
6 Lining
10, 10A, 10B Base plate
11 Side part
12 Profile support
21 Bead
24 Profile corresponding to beads
25 Profile running orthogonally with respect to beads
40, 41, 42, 43, 44 Step
50 Contour
101, 101A, 101B, 102, 111, 121 Padding channel
1011, 1011A, 1011B, 1012, 1013, 1014, 1015 Tab
- O Opening
- S Side wall
- V Section
Patent Application
20080084105
