Air cushion device for seat back of vehicle seat, vehicle seat, motor vehicle

Abstract

The invention relates to an air cushion device (10) for a seat back of a vehicle seat, in particular having a massage function for an adjustable lumbar support of the seat back, comprising at least one first and one second air cushion pair (1 '-5 '') which can be or are assigned to a back region and / or a shoulder region of the seat back, each of the air cushions (1 '-5 '') of the pair (1-5) of air cushions (1'-5'') is designed and arranged at least substantially in mirror symmetry with respect to a longitudinal center axis (11) of the air cushion device (10), and wherein each of the air cushions (1 '-5 '') of the pair (1-5) of air cushions (1'-5'') has a longitudinal edge (L) facing the other air cushion (1 '-5 '') of the same pair (1-5), and wherein the air cushions (1'-5'') of the pair (1-5) of air cushions (1 '-5 '') have a longitudinal edge (L) facing the other air cushion (1'-5'') of the pair (1-5) of air cushions (1 '-5 ''). The air cushions (1 ', 1 '') of the first pair (1) of air cushions (1', 1'') are arranged such that the longitudinal edges (L) of the first pair (1) of air cushions (1 ', 1 '') extend at least substantially parallel to one another. According to the invention, the air cushions (2 ', 2' ') of the second pair (2) of air cushions (2', 2 '') are arranged so as to be twisted relative to one another such that the longitudinal edges (L) of the second pair (2) of air cushions (2 ', 2' ') enclose a first acute angle (alpha) with the longitudinal central axis (11).

Description

[0001] The invention relates to an air cushion device for a seat back of a vehicle seat, in particular with a massage function for an adjustable lumbar support of the seat back, having at least a first pair of air cushions and a second pair of air cushions, each air cushion being assignable to a back region and / or a shoulder region of the seat back, wherein the air cushions of the pair of air cushions are each designed and arranged at least substantially mirror-symmetrically with respect to a longitudinal center axis of the air cushion device, wherein the air cushions of the pair of air cushions each have a longitudinal edge facing the other air cushion of the same pair of air cushions, and wherein the air cushions of the first pair of air cushions are arranged such that the longitudinal edges of the first pair of air cushions extend at least approximately parallel to one another.

[0002] The invention also relates to a vehicle seat having such an air cushion device and to a motor vehicle having such a vehicle seat.

[0003] Air cushion devices of the type mentioned are known from the prior art. Pneumatic lumbar supports are also known, for example for vehicle seats of motor vehicles, which enable an adjustment of a lumbar support (lordosis) by filling the air cushions or air cells of such an air cushion device to adapt to a user-specific natural contour (S-profile of the spine) of the spine in the lumbar region. The air supply is usually carried out by a pump device with a pump motor. The inflation, deflation and air pressure maintenance are controlled by a control device and a valve device.

[0004] For example, an air cushion device with multiple pairs of air cushions is known from the published patent application DE 20 2019 100 710 U1, which comprises an even number of air cushions, wherein two air cushion devices are arranged in a row, in particular mirror-symmetrically. One pair of air cushion devices is in the shoulder region of the seat back and the further pairs of air cushions are arranged at a distance in the (lower) back region of the seat back. The longitudinal edges of all air cushions run parallel to one another.

[0005] It is the task of the invention to create an improved air cushion device which further enhances the ergonomics for the user.

[0006] The task on which the invention is based is solved by the air cushion device having the features of claim 1. According to the invention it is hereby provided that the air cushion devices in the second pair are twisted relative to each other such that the longitudinal edges of the second pair of air cushions enclose a first acute angle with the longitudinal center axis. The pair of air cushions preferably has exactly two air cushions, wherein one air cushion is located on a first side, in particular the left side, relative to the longitudinal center axis, and the other air cushion, in particular at the same height, is located on a side away from the first side, in particular the right side, relative to the longitudinal center axis. The twisted arrangement of the air cushions relative to the longitudinal center axis advantageously further improves the user's behavior and massage feeling in the vehicle seat. The air cushions can preferably be assigned or assigned to the shoulder region of the seat back. The invention is based on the knowledge that by twisting the air cushions, the ergonomics of the user, in particular in the shoulder region, is improved, since the contour of the air cushions thus better adapts to the natural contour of the user's shoulder blades. It is particularly preferred that the air cushion device as a whole is designed at least substantially mirror-symmetrically with respect to its longitudinal center axis relative to its outer contour. The air cushions in particular have an elastically deformable membrane. In particular, the air cushions consist of two such membranes, which are connected to each other in a sandwich-like air-tight manner, in particular welded. The air cushions in particular preferably have a wall thickness / thickness of at most 5 mm. For example, the air cushions have a nominal thickness of 3 mm ± 1 mm. Preferably, at least two air cushions, preferably all air cushion devices, or are formed on a common membrane carrier. The air cushions can in particular preferably be connected or connected to a pneumatic pump device, in particular with a pump motor, by means of a line.

[0007] According to a preferred development of the invention, the first angle of the second pair is at most 10°, in particular in the range of 2° to 10°, preferably 3° to 8°. With such an angle, the ergonomics is particularly advantageous. It is particularly preferred that the nominal size of the first angle is 5.7° ± 2°. The two air cushions in the pair each enclose the first angle with the longitudinal center axis, such that the longitudinal edges of the two different air cushions enclose twice the first angle with each other. Preferably, the cross section of each air cushion is at least approximately rectangular, such that the two remaining mutually parallel edges also enclose an acute angle with the longitudinal center axis, which angle corresponds to the difference between a right angle and the first angle, i.e. in particular at least 80°, but less than 90°.

[0008] It is particularly preferred to provide that the air cushion device has a third pair of air cushions, which can be assigned or assigned to the back region and / or shoulder region of the seat back, such that the air cushions in the third pair are each at least substantially mirror-symmetrically designed and arranged relative to the longitudinal center axis of the air cushion device and have a longitudinal edge facing the other air cushion in the third pair, and the air cushion devices in the third pair are twisted relative to each other such that the longitudinal edges of the third pair of air cushions form a second acute angle with the longitudinal center axis. This advantageously further improves the ergonomics, since two pairs of twisted air cushions are provided.

[0009] According to a preferred development of the application, the first angle and the second angle have the same size. Due to the angles being identical, the geometry of the air cushion device is particularly simple.

[0010] It is particularly preferred that the first angle and the second angle have different sizes. The different angles create particularly advantageous options for further optimizing ergonomics. In particular, the different angles take into account different body sizes of users.

[0011] According to a preferred development of the application, one of the angles, in particular the second angle, is at least, in particular exactly, twice the other of the angles, in particular the first angle. This has the advantage that the ergonomic effect of the device is particularly pronounced.

[0012] It is particularly preferred that the second pair of air cushions is arranged between the first pair of air cushions and the third pair of air cushions with respect to the longitudinal center axis. Through such an arrangement, the advantages of the air cushion device according to the application are particularly pronounced. For example, as described above, the first angle is greater than the second angle, in particular at least or exactly twice the second angle, so that the third pair of air cushions, which is spun in more strongly, is located more laterally, i.e. higher or closer to the user's shoulder region when the chair back is used as intended, thereby advantageously optimizing ergonomics.

[0013] According to a preferred development of the application, the air cushions of at least one pair of air cushions, in particular all pairs of air cushions, are at least substantially identical in geometry to the other air cushion of the pair. This advantageously ensures that the pairs of air cushions exert a uniform effect on the user when the air cushions are activated. The air cushion device also has the advantage of being structurally simple and can therefore be produced inexpensively.

[0014] It is particularly preferred that the air cushions of at least one pair of air cushions, in particular all pairs of air cushions, are each at least approximately rectangular in cross section. In the case of a rectangular shape, the advantages of the air cushion device according to the application are particularly pronounced. In particular, the air cushions have rounded corners. Preferably, the ratio of the side lengths of the air cushions is at least approximately or at most 4:3. In particular, the distance between the edges of two air cushions is at least approximately or at most the transverse or longitudinal dimension of the respective air cushion, in particular half the transverse or longitudinal dimension of the air cushion.

[0015] A vehicle seat for a motor vehicle having a seat back, and characterized in that an air cushion device according to the application is arranged in or on the seat back, in particular in or on the seat frame. This leads to the already mentioned advantages. The same advantages arise when the vehicle seat is used in other means of transport, in particular in an aircraft, and when the air cushion device according to the application is used in a seat that is not installed in a means of transport, for example a massage chair.

[0016] The motor vehicle having the features of claim 11 is characterized in that at least one vehicle seat according to the application. This also leads to the already mentioned advantages. In particular, the motor vehicle has a vehicle seat as a driver's seat.

[0017] Further advantages and preferred features as well as combinations of features result, inter alia, from the above description and claims. The application will be explained in more detail below with reference to the drawings. To this end, there are shown:

[0018] Figure 1 An advantageous air cushion device is shown, and

[0019] Figure 2 A detailed view of the air cushion device is shown.

[0020] Figure 1 An air cushion device 10 for a backrest of a (not shown) vehicle seat is shown. The air cushion device 10 is, inter alia, part of a pneumatically adjustable lumbar support, for example with a massage function. The air cushion device 10 has a plurality of pairs of air cushions, in this case five pairs of air cushions. The pairs of air cushions can each be assigned or have been assigned to a back region and / or a shoulder region of the backrest.

[0021] The air cushion device 10 has a first pair 1 of air cushions 1', 1'', a second pair 2 of air cushions 2', 2'', a third pair 3 of air cushions 3', 3'', a fourth pair 4 of air cushions 4', 4'' and a fifth pair 5 of air cushions 5', 5''. The air cushions 1'-5'' in the pairs 1-5 of air cushions 1'-5'' are each designed and arranged at least substantially mirror-symmetrically with respect to a longitudinal center axis 11 of the air cushion device 10. Furthermore, the air cushions 1'-5'' each have an elastically deformable membrane and are arranged on a common membrane carrier 12.

[0022] When the air cushion device 1 is used as intended and installed in a backrest, the pairs 1-5 of air cushions 1'-5'' are arranged in a vertical direction from top to bottom with respect to the longitudinal center axis 11 as follows: on top is the third pair 3, then the second pair 2, the first pair 1, the fourth pair 4, and on the bottom is the fifth pair 5.

[0023] The second pair 2 and the third pair 3 are a shoulder region (or upper back region) of the backrest and thus of the user, and the first pair 1 as well as the fourth pair 4 and the fifth pair 5 are a (lower) back region of the backrest and thus assignable or assigned to the user.

[0024] All air cushions 1'-5'' are at least substantially identical to one another in terms of their geometry and at least in terms of their respective outer contour. The air cushions 1'-5'' each have an at least approximately rectangular cross section. In the present case, the air cushions 1'-5'' each have rounded corners.

[0025] The air cushions 1'-5" of the pairs 1-5 each have a longitudinal edge L facing the air cushion 1'-5" of the same pair 1-5. For example, one of the longitudinal edges L of the air cushions 1'-5" of each pair 1-5 is provided with reference.

[0026] According to further exemplary embodiments, not shown, the air cushions 1'-5" have a cross section deviating from a rectangular shape, the air cushions 1'-5" preferably having at least one longitudinal edge L facing the air cushion 1'-5" of the same pair 1-5, which extends at least partially as a straight line. It is not geometrically necessary that this is the longitudinal edge of the side here. The described geometric observations also apply to the respective longitudinal edges designed as upper or lower edges.

[0027] The air cushions 1', 1" of the first pair 1, the air cushions 4', 4" of the fourth pair 4 and the air cushions 5', 5" of the fifth pair 5 are in any case arranged in such a way that their respective longitudinal edges L, due to the rectangular shape, are at least approximately parallel to one another.

[0028] In contrast, the air cushions 2', 2" of the second pair 2 and the air cushions 3', 3" of the third pair 3 are each arranged twisted relative to one another, such that the longitudinal edges L of the air cushions 2', 2" of the second pair 2 enclose a first acute angle a with the longitudinal center axis 11 and the longitudinal edges L of the air cushions 3', 3" of the third pair 3 enclose a second acute angle β with the longitudinal center axis 11.

[0029] Figure 2 The respective detailed representations of the second pair 2 and the third pair 3 are shown. In the present case, the first angle a is at most 10°, more precisely, it is in the range of 3° to 8°. Here, the first angle a and the second angle β differ in size. In the present case, the second angle β is exactly twice as large as the first angle a. According to alternative embodiments, not shown, the angles a, β are of the same size.

[0030] List of reference signs

[0031] 1 first pair

[0032] 2 second pair

[0033] 3 third pair

[0034] 4 fourth pair

[0035] 5 fifth pair

[0036] 1', 1" air cushions of the first pair

[0037] 2', 2" air cushions of the second pair

[0038] 3', 3" air cushions of the third pair

[0039] 4', 4'' fourth pair of air cushions

[0040] 5', 5'' fifth pair of air cushions

[0041] 10 air cushion arrangement

[0042] 11 longitudinal center axis

[0043] 12 membrane carrier

[0044] a first angle

[0045] β second angle

[0046] L longitudinal edge

Claims

1. An air cushion device (10) for the backrest of a vehicle seat, the air cushion device (10) particularly having a massage function for adjustable lumbar support of the backrest, - It has at least one first and second air cushion pair (1'-5''), which can be distributed or has been distributed to the back area and / or shoulder area of ​​the chair back. -in, The air cushions (1'-5'') in the pair (1-5) are respectively constructed and arranged at least substantially mirror-symmetrically with respect to the longitudinal central axis (11) of the air cushion device (10). - wherein, in the pair (1-5) of air cushions (1'-5''), each air cushion (1'-5'') has a longitudinal edge (L) facing the other air cushion (1'-5'') of the same pair (1-5), and -In this pair (1) air cushions (1', 1'') are arranged such that the longitudinal edges (L) of the first pair (1) air cushions (1', 1'') extend at least substantially parallel to each other. The feature is that the air cushions (2', 2'') in the second pair (2) air cushions (2', 2'') are arranged to be twisted relative to each other, such that the longitudinal edge (L) of the second pair (2) air cushions (2', 2'') forms a first acute angle (α) with the longitudinal central axis (11).

2. The air cushion device according to claim 1, characterized in that, The first angle (α) of the second pair (2) is at most 10°, especially in the range of 2° to 10°, preferably between 3° and 8°.

3. The air cushion device according to any one of the preceding claims, characterized in that, The air cushion device (10) has a third pair (3) air cushions (3', 3''), the air cushions (3', 3'') of the third pair (3) air cushions (3', 3'') being constructed and arranged at least substantially mirror-symmetrically with respect to the longitudinal central axis (11) of the air cushion device (10) in each case, and having a longitudinal edge (L) of another air cushion (3', 3'') facing the third pair (3) air cushions (3', 3''), and the third pair (3) air cushions (3', 3'') being arranged rotatably relative to each other, such that the longitudinal edge (L) of the third pair (3) air cushions (3', 3'') forms a second acute angle (β) with the longitudinal central axis (11).

4. The air cushion device according to claim 3, characterized in that, The first and second angles (α, β) have the same dimensions.

5. The air cushion device according to claim 3, characterized in that, The first and second angles (α, β) have different dimensions.

6. The air cushion device according to claim 5, characterized in that, One of the angles (α, β), especially the second angle (β), is at least, especially precisely, twice the other of the angles (α, β), especially the first angle (α).

7. The air cushion device according to any one of claims 3 to 6, characterized in that, The second pair (2) air cushions (2', 2'') are arranged between the first pair (1) air cushions (1', 1'') and the third pair (3) air cushions (3', 3'') relative to the longitudinal central axis (11).

8. The air cushion device according to any one of the preceding claims, characterized in that, At least one pair of air cushions (1'-5'') (1-5), especially all pairs of air cushions (1'-5''), are geometrically designed to be at least substantially identical to the other pair of air cushions (1'-5''), especially all pairs of air cushions (1'-5'').

9. The air cushion device according to any one of the preceding claims, characterized in that, At least one pair of air cushions (1'-5'') (1-5), especially all pairs of air cushions (1'-5''), are at least approximately rectangular in cross-section.

10. A vehicle seat for a motor vehicle, having a backrest, characterized in that, The air cushion device (10) according to any one of claims 1 to 9 is arranged in or on the back of the chair, especially in or on the seat frame.

11. A motor vehicle, characterized in that, It has at least one vehicle seat as described in claim 10.

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