DE102011114546A1 - Cross structure for back frame of seat of vehicle, sets width of passages with predetermined structure larger than width of adjacent horizontal surface regions of horizontal upper and lower surface portions - Google Patents

Abstract

The cross structure (100) has a horizontal upper surface portion (110) and a horizontal lower surface portion (120) and a vertical wall that are interconnected at front end of a back frame (200). The back frame has passages (210) for receiving headrest support rod (300). The width of the passages with predetermined structure (210-1) is larger than the width of the adjacent horizontal surface regions (111,121) of the horizontal upper and lower surface portions.

Description

The invention relates to a cross member for a seat back frame of a vehicle seat, which is formed as a sheet metal forming part and has passages for receiving at least one head restraint bar, the passages having a collar formed from the sheet material of the transverse element, wherein the cross member in its built-in seat back frame position an upper horizontal Surface area and a lower horizontal surface area, which are interconnected by a substantially lying on the front of the seat back frame vertical wall.

It is well known to provide headrests in motor vehicles, particularly passenger cars or trucks, to the vehicle seats. The headrests are used in addition to taking a comfortable sitting position especially to ensure a corresponding reverberation of a head or a cervical spine area of an occupant in an accident.

For attachment of the headrest to the vehicle seat, the transverse element is arranged in the upper region of the seat back frame structure. This upper cross member is also referred to as a headboard of the seat back frame structure. Presently, there are various head restraint attachment concepts whose head cross plates differ in how the head restraint receptacle is made in the head cross plate.

The starting point for the invention are the following variants for attaching a headrest to a transverse element of the seat back frame structure.

Basically, a distinction is made in integrated headrests and separate headrests.

In a first embodiment variant for producing an integrated headrest, a headrest bracket is pressed in and welded in the transverse element, wherein the welding surfaces lie against the passage edges of the transverse element. An on or eingeschweißter headrest strap is for example from the published patent application DE 2006 018 289 A1 known.

In a second embodiment for the arrangement of a separate headrest joint bushings are integrated into the transverse element, wherein the joint bushings are adapted to receive headrest stand. Such a solution is from the document DE 10 2009 039 154 A1 removable.

In a third embodiment, also for the arrangement of a separate headrest in each case two superposed passages are introduced into the transverse element, which are adapted to receive a guide sleeve. The formation of such passages in a cross member discloses the document DE 20 2010 005 841 U1 ,

As is readily apparent from the prior art, disadvantageously, for each of the illustrated embodiments differing in their basic geometric shape transverse elements are used. As a result, a multiplicity of different tools must be maintained for the multiplicity of different transverse elements.

In addition, for the produced in the head region of the cross member passages for the headrest bracket (first embodiment) or for the openings to be produced for the headrest stand in the joint bushings (second embodiment) or the passages to be produced for the guide sleeve (third embodiment) also different tools needed.

The invention has for its object to provide a seat back frame structure to the various headrest mounting concepts are easily feasible, the production cost and the time required for the production tooling should be minimized.

The invention is based on that in the document DE 20 2010 005 841 U1 described transverse element for a backrest frame of a vehicle seat, which is formed as sheet metal forming part and has passages for receiving at least one headrest support rod, the passages having a collar formed from the sheet material of the transverse element, wherein the transverse element in its built-in backrest frame position an upper horizontal surface area and a lower horizontal surface area which are interconnected by a substantially lying on the front of the seat back frame vertical wall.

In conjunction with these features of the preamble of claim 1, the object is achieved by the horizontal surface areas of a rule geometry having transverse element are formed in the region of the passages to form at least one receiving area for at least one headrest rod in a first width, which is greater than a second Width at the at least one receiving area adjacent horizontal surface areas, wherein the first width is dimensioned so that there optionally passages with predeterminable shapes in the transverse element can be introduced, the largest dimension exceeds the second width of the transverse element of the adjacent horizontal surface areas.

Such cross members are advantageously adapted to accommodate both integrated headrests according to the first embodiment and separate headrests according to the second and third embodiments in itself.

As can be seen from the patent claim 1, it is provided that the transverse element has an always constant predetermined geometry, which is referred to as a rule geometry, and which makes it possible to introduce passages with predeterminable shapes (depending on the embodiment) in the transverse element, wherein the passages may even be wider than the second width of the adjoining surface areas, usually between two receiving areas.

The invention creates a unit cross-member whose rule geometry always remains the same, whereby the production cost of a complete backrest frame with such integrated in the backrest frame unit cross member substantially reduced, since the different embodiments are taken into account in the design of the rule geometry. This unitary cross-member provides manufacturing advantages since the same unit cross-member with the control geometry can always be used for the various headrest attachment concepts. Since such a unit transverse element is modularly installed in a backrest frame, the otherwise possibly different backrest frames in the mounting region of the unit head plate need not be adapted to different transverse elements as before, but it can always connected at least in the mounting region of the head plate consistent backrest frame with a non-changing unit cross member become. As a result, the overall manufacturing process is much more efficient, since the backrest frames do not have to be adapted to different head plates. In addition, fewer different tools are advantageously required in the production of the unit cross-members with the respective passages of the different embodiments. There is provided for the production of the unit head plates a unified tool technology, as will be explained below, which only has to be changed to a limited extent in order to realize the mentioned embodiments.

The associated method for producing a unit cross-member is carried out as follows: In a first manufacturing step, the cutting of a base sheet by means of cutting takes place. In a second production step openings are introduced into the base plate by means of dancing. In a third production step (which usually comprises several forming part steps), the forming of the base sheet takes place by means of deep drawing or stamping. In a fourth manufacturing step, the edges of the base sheet are bent, that is, the edges are crimped. In a fifth production step, the openings introduced in the base plate are provided with a collar by means of collar pulling, so that the desired passages are formed.

The new, more efficient production method is characterized in that the first, third and fourth production step in which the control geometry of the unit cross-member is formed is always carried out unchanged. This is the particular advantage of the process. In the prior art, the same manufacturing steps are basically carried out for differently geometrically executed transverse elements, but the same tools can not always be used for this purpose, since the unit transverse elements differ from each other.

The manufacturing method according to the invention efficiently takes into account that different passes are needed in the unit cross member. The final shape and dimensions of the passages are initially taken into account by the punched-out shape and size of the openings in the base plate within the second manufacturing step, taking into account the respective desired shape and dimension of the passages in the collar drawing in the fifth manufacturing step.

Within the tools, for example, circular or square passages are formed in the production method according to the invention, depending on which pass is to be produced, only in the second production step, the punching, and in the fifth production step, the collar drawing, the punch heads or the collar pull punches and the respective associated counterholder must be replaced.

According to the first embodiment, unit head plates are provided, which are characterized in that in the receiving region of the transverse element with the first width circular passages are arranged, wherein an outer diameter of the circular passages is optionally greater than the second width of the transverse element of the receiving areas adjacent horizontal surface areas.

According to the second and third embodiment variant unit head plates are created, which are characterized in that quadrangular passages are arranged in the receiving area of the transverse element with the first width, wherein at least one extending in the width direction of the transverse element side of the quadratic passages optionally the second width of the adjacent to the receiving areas exceeds horizontal surface areas.

In a further preferred embodiment of the invention, the respective lying on the back of the backrest frame edge of the upper horizontal surface region and the lower horizontal surface region of the unit head plate is flanged substantially 180 ° and forms a shelf. As a result, the personal safety is ensured for behind a vehicle seat people. The board is closed in the direction of the person behind it, so bent in the vehicle in the direction of travel, so that there is no risk of injury in the event of a crash.

To stabilize the unit head plate, the unit head plate in the adjacent surface areas of the vertical wall between the receiving areas beads.

By assembling a backrest frame with such a unit cross member, novel backrest frames are created. Headrests are integrally integrated into the unitary cross members (permanently with the unit cross member) or separately (detachably with the unit cross member) according to the various head restraint attachment concepts, as further described in the description section.

Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.

Hereinafter, several embodiments of the invention will be explained with reference to the accompanying drawings. Show it:

1A a perspective view backrest of a vehicle seat with a unit cross member and provisions in a first embodiment for the arrangement of a headrest support bar, wherein the unit cross member is shown cut open in the region of the headrest support bar for a headrest;

1B the backrest after 1A without cut area;

1C a schematic representation of the arrangement of the headrest support rod in the unit cross-member according to the first embodiment according to 1A . 1B ;

2A a perspective view backrest of a vehicle seat with the unit cross member and provisions in a second embodiment for arranging a headrest support rod, wherein the unit cross member is shown in the region of the headrest support rod for a headrest cut open;

2 B the backrest after 2A without cut area;

2C a schematic representation of the arrangement of the headrest support rod in the unit cross member according to the second embodiment according to 2A . 2 B ;

3A a perspective view backrest of a vehicle seat with the unit cross member and provisions in a third embodiment for arranging a headrest support rod, wherein the unit cross member is shown in the region of the headrest support rod for a headrest cut open;

3B the backrest after 3A without cut area;

3C a schematic representation of the arrangement of the headrest support rod in the unit cross-member according to the third embodiment of the 3A . 3B ; and

4 a matrix representation for explaining the manufacturing process.

Unit cross element and first embodiment variant:

The 1A . 1B show perspectively illustrated backrests of a vehicle seat with a unit transverse element 100 , Which in a first embodiment, provisions for the arrangement of a headrest support bar 300 having. For clarity, the unit cross-member 100 in 1A in a vertical plane in the area of one of the head restraint bars 300 shown cut. The unit cross-member 100 is manufactured separately and later with a backrest frame 200 connected to the backrest. In the 1A . 1B this connection is already made.

The unit cross-member 100 has horizontal surface areas 110 . 120 on. The horizontal surface areas 110 . 120 are on the front of the backrest frame 200 over a vertical wall 130 connected with each other. The Unit crossmember 100 thus forms an open large> C <directed to a rear seat occupant. Both the upper horizontal surface area 110 as well as the lower horizontal surface area 120 make a border 140 who is to a board 150 is flanged. The board 150 is to the front of the backrest frame 200 flattened so that form to the rear seated closed small <c>. This embodiment can be seen in an associated schematic sectional view in 1C be traced.

In the upper horizontal area 110 and the lower horizontal surface area 120 are each two passages 210 formed, each having a headrest support bar 300 record, which are connected in the embodiment to a headrest bracket.

In the first embodiment, provisions were made for the attachment of the headrest bracket that the upper horizontal surface area 110 and in the lower horizontal area 120 circular passages 210-1 are formed. These passages 201-1 as well as in 1C comparatively shown, each with a collar 211 on.

The circular passages 210-1 are in designated shooting areas 100A arranged. These recording areas 100A with respect to the horizontal surface areas 110 . 120 a first width a. In the adjacent between the reception areas 100A lying upper and lower surface areas 111 . 121 this first width a is not reached. In these areas 111 . 121 is the unit cross-member 100 executed in a smaller second width b.

This has the effect of having a standard cross-member having a rule geometry 100 can be produced material-saving, however, where the receiving areas 100A are located, the first width a is formed, so that optional circular passages 210-1 in the unit transverse element 100 can be introduced, the largest dimension optionally the second width b of the unit transverse element 100 the upper and lower adjacent horizontal surface areas 111 . 121 exceeds.

In the reception areas 100A are thus headrest support rods 300 can be arranged with different diameters. According to this diameter of the headrest support rods 300 becomes the diameter d _{210-1 of} the circular passage 210-1 executed. By compared to the second width b larger first width a of the receiving areas 100A For example, the diameter d _{210-1 of} the circular passage may be larger or smaller than the second width b of the upper and lower adjacent surface areas, respectively 111 . 121 be. The unit cross-member 100 This advantageously results in an increased variability for the arrangement of different headrest support rods 300 with different diameters.

In this first embodiment, the headrest support rods 300 in the unit transverse element 100 integrated, in both horizontal areas 110 . 120 pressed and then welded, with the lateral surface of the headrest support rods 300 at the in the circular passages 210-1 trained collar 211 is applied. The collar 211 in particular serves to facilitate the production of the welded joint.

Before the not adjustable in the first embodiment headrest 400 is placed on the headrest bracket, must in this first embodiment, the unit cross member 100 be connected to the headrest strap. In the first embodiment, the headrest 400 not height adjustable, but the headrest 400 is formed as an integrated head restraint from the backrest foam which connects the head restraint support bars connected to a head restraint bar 300 surrounds. Height-adjustable separate headrests 400 are shown and described in the second and third embodiment.

From the 1A . 1B it also becomes clear that in the vertical wall 130 between the reception areas 100A in the adjacent surface areas 131 the vertical wall 130 beading 130-1 are arranged, the stability of the unit transverse element 100 serve. The vertical wall 130 is formed as a kind of semicircular depression, as they starting from the receiving areas 100A with the first width a, relative to a vertical center axis of the vertical wall 130 , except for the second width b of the adjacent horizontal surface areas 111 . 121 is reduced.

Second embodiment variant:

The 2A . 2 B also show in perspective represented backrests of a vehicle seat with the unit cross member 100 which in a second embodiment, other arrangements for the arrangement of a headrest support bar 300 having.

On the one consistent rule geometry having unit cross member 100 will not be discussed again in connection with the second embodiment.

In the second embodiment, for attaching the headrest support rods 300 Made arrangements in the way that in the upper horizontal surface area 110 and in the lower horizontal area 120 quadratic passages 210-2 are formed. These passages 210-2 wise, like 2C comparatively shows, each a collar 211 on.

The square passages 210-2 are in turn in the designated recording areas 100A arranged. These recording areas 100A have the first width a analogous to the first embodiment. In the adjacent, between the reception areas 100A lying upper and lower surface areas 111 . 121 Again, only the second width b is achieved analogous to the first embodiment.

In addition to the already explained material-saving effect, the particular advantage is that in the receiving areas 100A with the first width a either square holes 210-2 in the unit transverse element 100 can be introduced, the largest dimension of the second width b of the unit transverse element 100 the upper and lower adjacent horizontal surface areas 111 . 121 exceeds.

In the reception areas 100A are headrest support rods 300 can be arranged with different diameters. In the second embodiment are in the passages 210-2 in contrast to the first embodiment, square headboard guide parts 101 introduced in the manner of angular headrail guide sleeves. Therefore, in the second embodiment, quadrilateral passes 210-2 formed with side edge lengths x1, y1.

The in the width direction of the horizontal surface areas 110 . 120 extending side edge length x1 is orthogonal to the side edge length y1. Due to the larger first width a of the receiving areas 100A For example, the side edge lengths x1, y1 can be made longer than with the conventional cross elements. In particular, the side edge length x1 can be made variable. The side edge length x1, for example, the second. Width b should be equal to or shorter than the second width b. However, there is also the possibility that the side edge length x1 almost reaches the extent of the first width a.

In this second embodiment, the head restraint bars become 300 separately, that is from the backrest frame 200 the backrest of the vehicle seat removed, in the outside square head plate guide sleeve 101 brought in. In this case, each head restraint bar 300 its own quadrangular outside and inside trained head restraint guide part 401 on, which is formed in the manner of a headrest guide sleeve. (please refer 2C ). The headrest guide sleeve 401 can in the head plate guide sleeve 101 be plugged. The side edge length x1, y1 of the second embodiment is therefore such that both sleeves 401 and 101 , hence the head restraint support bars disposed therein 300 , in the quadratic passages 201-2 Find a place.

In this second embodiment, the head plate guide sleeve 101 with the unit cross element 100 in the two horizontal surface areas 110 . 120 pressed and welded, wherein the lateral surface of the head plate guide sleeve to the collar 211 the square passages 210-2 rests, which also here a slight weld to the collar 211 is guaranteed.

Before the headrest holding rods 300 the headrest 400 with her headrest guide sleeve 401 in the head plate guide sleeve 101 can be plugged, must in the second embodiment, the unit cross-member 100 with the head plate guide sleeve 101 be welded. In the second embodiment, the headrest 400 by inserting and removing the head restraint rods 300 in the headrest guide sleeves 401 opposite the unit cross member 100 height-adjustable.

The second embodiment is characterized in that by the two guide sleeves 101 . 401 , in particular by the additional arrangement of the head plate guide sleeve 101 , a tolerance compensation between headrest rods 300 and unit cross member 100 takes place. The to the inner surface of the headband guide sleeve 101 matching outer circumferential surface of the headrest guide sleeves 401 causes a tolerance-free arrangement of the headrest support bar 300 and with it the headrest 300 ,

The 3A . 3B show further perspectively illustrated backrests of a vehicle seat with the unit cross member 100 , which in a third embodiment, in turn, other arrangements for the arrangement of a headrest support bar 300 having.

In this third embodiment, the head restraint bars become 300 also separately, that is from the backrest frame 200 the backrest of the vehicle seat removably arranged. In this case, each head restraint bar 300 its own quadrangular outside and inside trained head restraint guide part 401 on, which is formed in the manner of a headrest guide sleeve (see 3B . 3C ).

The headrest guide sleeve 401 will however (see 3B . 3C ) not like the second embodiment variant (cf. 2C ) in a head plate guide sleeve 101 plugged, but the headrest guide sleeves 401 be directly by plugging and latching with the unit cross member 100 connected. The headrest rods 300 are in the headrest guide sleeve 401 Lockable in different positions, causing the headrest 400 is height adjustable in the third embodiment.

This has the consequence that the sides of the likewise quadrangular passages 201-3 , in that no head plate guide sleeve 101 is used, have a smaller side edge length x2, y2 than in the second embodiment variant. However, the basic idea of the invention is also realized in the third embodiment variant, since the larger first width a of the receiving areas 100A Also, the side edge lengths x2, y2 of the third embodiment can be made longer than in the usual cross members. In particular, the side edge length x2 can be made variable. The side edge length x2 may correspond, for example, to the second width b or shorter than the second width b. However, there is also the possibility that the side edge length x2 almost reaches the extent of the first width a.

The assembly of the headrest holding rods 300 with the headrest arranged thereon 400 is done by simply plugging and locking the headrest guide sleeves 401 in the prepared passages 201-3 in the two horizontal surface areas 110 . 120 ,

Based on the matrix in 4 becomes the associated manufacturing process of the unit head plates 100 with the rule geometry and the different arrangements for the arrangement of the headrest support rods 300 in a unit head plate 100 explained according to the first, second and third embodiment.

In the left column of the matrix are the base plates 10 shown cut by means of cutting in a first production step a). Depending on the variant, different openings 11 . 12 . 13 by punching in the otherwise similar base plate 10 introduced in a second manufacturing step.

In the upper figure of the left column are circular openings 11 , in the middle figure of the left column are quadrangular openings 12 with one side edge length x1, y1 and in the lower figure of the left column are quadrangular openings 12 introduced with a side edge length x2, y2. These base sheets prepared in the first and second manufacturing steps 10 be bent according to the figures in the middle column by deep drawing or stamping in a third manufacturing step, by flanging in a fourth manufacturing step edge and by means of collar pulling in a fifth manufacturing step, a circular or square collar 211 formed, creating circular sized d _210-1 passes 201-1 or differently sized x1, y1; x2, y2 quadrilateral passages 201-2 . 201-3 arise. The reception areas 100A with the first width a are not shown in detail in the middle column.

The respective figure in the left column has a unit cross-member 100 with the respective provisions for the arrangement of the headrest support rods 300 in the respective first, second and third embodiment.

LIST OF REFERENCE NUMBERS

10

base plate

11

first circular opening

12

first angular opening

13

second angular opening

100

crossmember

100A

reception area

101

Head plate guide part (head plate guide sleeve)

110

Upper horizontal area

111

surface area adjacent to upper receiving areas

120

lower horizontal surface area

121

area adjacent to lower receiving areas

130

vertical wall

130-1

beading

131

Area adjacent to receiving areas

140

edge

150

shelf

200

Backrest frame

210

by trains

210-1

circular passage

210-2

first angular passage

210-3

second angular passage

211

collar

300

Headrest support bar

a

first width

b

second width

x1

Side edge length of the angular passage 210-2

y1

Side edge length of the angular passage 210-2

x2

Side edge length of the angular passage 210-3

y2

Side edge length of the angular passage 210-3

400

headrest

401

Headrest guide part (headrest guide sleeve)

d _210-1

Diameter of the circular passage 210-1

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 2006018289 A1 [0006]
• DE 102009039154 A1 [0007]
• DE 202010005841 U1 [0008, 0012]

Claims (8)

Cross element ( 100 ) for a backrest frame ( 200 ) of a vehicle seat, which is designed as a sheet metal forming part and passages ( 210 ) for receiving at least one headrest support bar ( 300 ), wherein the passages ( 210 ) one of the sheet material of the cross element ( 100 ) formed collar ( 211 ), wherein the transverse element ( 100 ) in its in the backrest frame ( 200 ) built-in position an upper horizontal surface area ( 110 ) and a lower horizontal area ( 120 ), which is defined by a vertical wall located substantially on the front of the seat back frame (FIG. 130 ), characterized in that the horizontal surface areas ( 110 . 120 ) of the cross-member having a rule geometry ( 100 ) in the area of the passages ( 210 ) forming at least one receiving area ( 100A ) for at least one headrest bar ( 400 ) are formed in a first width (a) which is greater than a second width (b) of the at least one receiving area ( 100A ) adjacent horizontal surface areas ( 111 . 121 ), wherein the first width (a) is dimensioned so that there optionally passes ( 210 ) with predeterminable shapes ( 210-1 . 210-2 . 210-3 ) in the transverse element ( 100 ) can be introduced, the largest dimension of the second width (b) of the transverse element ( 100 ) of the adjacent horizontal surface areas ( 111 . 121 ) exceeds. Cross element ( 100 ) according to claim 1, characterized in that in the receiving area ( 100A ) of the cross element ( 100 ) with the first width (a) circular passages ( 210-1 ), wherein an outer diameter (d _210-1 ) of the circular passages ( 210-1 ) is optionally greater than the second width (b) of the transverse element ( 100 ) in the adjacent horizontal surface areas ( 111 . 121 ). Cross element ( 100 ) according to claim 1, characterized in that in the receiving area ( 100A ) of the cross element ( 100 ) with the first width (a) quadrilateral passages ( 210-2 . 210-3 ) are arranged, wherein at least one in the width direction of the transverse element ( 100 ) extending side with a side edge length (x1, x2) of the quadrilateral passages ( 210-2 . 210-3 ) optionally the second width (b) of the transverse element ( 100 ) in the adjacent horizontal surface areas ( 111 . 121 ) exceeds. Cross element ( 100 ) according to claim 1, characterized in that the respective one on the back of the backrest frame ( 200 ) lying edge ( 140 ) of the upper horizontal area ( 110 ) and the lower horizontal area ( 120 ) of the cross element ( 100 ) is flanged substantially 180 ° and a board ( 150 ) Cross element ( 100 ) according to claim 1, characterized in that the transverse element ( 100 ) in one of the receiving areas ( 100A ) adjacent area ( 131 ) of the vertical wall ( 130 ) Beading ( 130-1 ) having. Backrest frame for a vehicle seat with a transverse element according to at least one of claims 1 to 5. Method for producing a cross element ( 100 ) with the following manufacturing steps: a) cutting a base sheet ( 10 ) by cutting b) introduction of at least one opening ( 11 . 12 . 13 ) by punching c) forming the base sheet ( 10 ) by deep drawing or embossing d) bending the edges ( 140 ) of the base sheet ( 10 ) by crimping e) forming one with a collar ( 211 ) provided passage ( 210 ) by means of collar-pulling of the openings, characterized in that by the first and third as well as the fourth production step a), c), d) an always constant rule geometry of the transverse element ( 100 ) (Unit cross-member) is formed, the shape and dimensions of the passages ( 210-1 . 210-2 . 210-3 ) by the shape and size of the opening ( 11 . 12 . 13 ) of the second production step b) and by the formation of the respective collar ( 211 ) are influenced in the fifth production step e) corresponding to the second production step b). A method according to claim 7, characterized in that the rule geometry having transverse element ( 100 ) (Unit transverse element) variable with circular passages ( 210-1 ) or square passages ( 210-2 . 210-3 ) is provided by in the second b) and fourth d) manufacturing step, a change of the punching heads and collar pull punches and the respective associated counter-holder is performed.

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