Vehicle seat with molded foam

Abstract

The present application relates to a vehicle seat (1) comprising a seat part (2) and / or a backrest part (3) wherein the seat part (2) and / or the backrest part (3) comprises a cushion support (12a, 12b) comprising a cushion pad (13a, 13b) and a cushion cover (7a, 7b) at least partially surrounding the cushion pad (13a, 13b). The cushion (13a, 13b) has a recess (9a, 9b) facing the occupant, in which recess (9a, 9b) an at least partially plate-like molded foam (10a, 10b) is inserted substantially parallel to the cushion surface (8a, 8b). Furthermore, the molded foam portion (10a, 10b) has a plurality of lobes (15) and holes (11) extending substantially perpendicular to the cushion surface (8a, 8b). The lobes (15) are spaced apart from each other, thereby forming a channel between the lobes (15). At least some of the holes (11) are arranged in the channel (16) and at least some of the holes (11) penetrate the molded foam portion (10a, 10b).

Description

Technical Field

[0001] This application relates to a vehicle seat having at least one seat portion or one backrest. The seat portion or backrest has a cushioning support, which includes a cushioning pad and a pad cover that at least partially surrounds the cushioning pad. In addition, the cushioning pad has a recess facing the passenger, into which a molded foam portion, at least partially plate-shaped, is inserted, parallel to the surface of the cushioning pad. Background Technology

[0002] Commercial vehicles, such as agricultural machinery, construction machinery, and transport vehicles, are typically used continuously for extended periods, making passenger comfort crucial. Therefore, suitable vehicle seats are equipped with various comfort features, such as air conditioning systems. These systems sometimes include heating systems for heating the seats and ventilation systems for cooling them. Ventilation systems include fans to generate airflow and air supply lines to deliver the air.

[0003] In previous vehicle seats, the seat surface and / or backrest surface, and / or backrest, were also provided with a breathable spacer fabric so that air could be delivered to the passenger through the seat area and / or backrest. Previously, this spacer fabric was inserted into a recess in the seat cushion or backrest cushion. Air supply lines from the ventilation system also supplied these recesses so that air could be forced through the spacer fabric by a fan. On the one hand, the spacer fabric was complex and expensive to manufacture because it had to maintain breathability while possessing the same strength as the surrounding cushioning. On the other hand, the airflow lacked guidance as it passed through the spacer fabric, resulting in uneven escape from the seat area and / or backrest. Consequently, more air was supplied into the recess from the area closer to the air supply line inlet than from the area farther away from the inlet.

[0004] Therefore, the problem to be solved is to provide a vehicle seat in which the spacer fabric is replaced by a molded foam section that is easier to manufacture, has better cushioning performance, and can achieve better ventilation through a combination of holes and channels. Summary of the Invention

[0005] Therefore, this application provides a vehicle seat including a seat portion and / or a backrest, wherein the seat portion and / or backrest have a cushioning support, the cushioning support including a cushioning pad and a pad cover at least partially surrounding the cushioning pad, and the cushioning pad having a recess facing the passenger, into which a molded foam portion, at least partially plate-shaped, is inserted, substantially parallel to the surface of the cushioning pad, the molded foam portion having a plurality of crests and holes extending substantially perpendicular to the surface of the cushioning pad. The crests are spaced apart from each other, forming channels between the crests, at least some of the holes are arranged in the channels, and at least some of the holes penetrate the molded foam portion.

[0006] Typically, a vehicle seat has a seat base bolted to the vehicle body and a seat superstructure positioned above the seat base. The seat superstructure includes a seat portion extending substantially in the longitudinal and width directions and a backrest extending substantially in the width and height directions. The backrest is typically configured to rotate about its width relative to the seat portion to adjust the angle between the seat portion and the backrest. Both the seat portion and the backrest have support structures in the form of cushioning supports. These cushioning supports can be, for example, a seat shell or a backrest shell, or a frame structure. A cushioning pad is attached to or abuts against the cushioning support. The cushioning pad has a recess facing the passenger. The depth of the recess can be the same as the cushioning pad, i.e., extending through the entire cushioning pad or only covering a portion of its depth. Molded foam is inserted into the recess, preferably fitting tightly. The molded foam is preferably flush with the cushioning pad to avoid uneven areas on the surface of the cushioning pad due to the inserted molded foam. The molded foam can directly abut against the cushioning support, the cushioning pad, or the intermediate layer.

[0007] According to one embodiment, the side of the molded foam portion facing the passenger is smooth, as is typical for foam components. Alternatively, this surface may also have agglomerates or similar structures.

[0008] According to a particularly preferred embodiment, the dome extends along the direction of the cushioning support on the lower side of the molded foam portion.

[0009] The raised domes ensure that the molded foam portion does not lie flat against the cushioning pad, cushioning support, or intermediate layer. Furthermore, the individual raised domes are spaced apart from each other. The spaces between the raised domes form channels. Preferably, they extend substantially continuously on one hand in the longitudinal or height direction and on the other hand in the width direction. Due to the specific shape or orientation of the molded foam portion, its orientation may deviate.

[0010] Because molded foam is generally not breathable, the molded foam section has holes extending from the top to the bottom of the molded foam section. If the backrest has a molded foam section, the term "top" should be replaced with "front" and "bottom" with "rear". Therefore, everything applicable to the seat section also applies to the backrest, with only logical changes to the directional names not explicitly mentioned.

[0011] The holes are preferably arranged in the channels. Optionally or additionally, the holes may be provided on the dome. The top of the dome may be crown-shaped, forming spaces between the points. Optionally, the holes may begin from the side of the dome and then extend through the molded foam portion parallel to the direction of the dome. Preferably, the orientation of all the holes in the molded foam portion is substantially parallel to each other and perpendicular to the surface of the molded foam portion, i.e., along the height direction or longitudinal direction.

[0012] In a particularly preferred embodiment, the convex tops are arranged in a lattice structure, wherein the lattice corresponds to a tetragonal Bravais lattice.

[0013] The regular arrangement of the domes allows the passageway to extend evenly. On the other hand, it improves deformation performance under passenger load. Furthermore, the regular structure allows air to flow evenly through the passageway.

[0014] According to a particularly preferred embodiment, the convex ridges of adjacent rows are arranged to be staggered, wherein the channel meanders between the convex ridges.

[0015] Preferably, the convex tops are not precisely aligned with the lattice points, but are slightly offset from them. The offset of the convex tops relative to the lattice points is less than 30% of their range, preferably less than 25%, and particularly preferably less than 20%. The offset of individual convex tops causes the channels formed by the spaces between the convex tops to have a meandering pattern between the channels. Optionally or additionally, some of the convex tops may be combined to form a base arranged according to a tetragonal Bravais lattice.

[0016] This meandering path ensures that airflow does not pass unimpeded through the channel, but is instead slowed and deflected by the staggered domes. Depending on the channel's curvature, the airflow is guided along certain preferred directions. This improves airflow performance, resulting in more even and comfortable ventilation.

[0017] In a particularly preferred embodiment, the convex dome is designed as a blunt-topped pyramid shape, wherein the base of the convex dome is rectangular or quadrangular.

[0018] This blunt-topped pyramid shape improves the stability of the convex tops under load. Furthermore, a generally rectangular or square base area is necessary to form proper channels. Airflow is also slowed by the edges of the convex tops, which would not occur with a circular base area. These convex tops are aligned so that they narrow away from the molded foam portion. The bases of two adjacent blunt-topped pyramids are preferably circular so that the channel between the convex tops is arched.

[0019] In a particularly preferred embodiment, the channels extend either substantially parallel to the width direction or substantially parallel to the longitudinal direction, wherein one channel intersects with several other channels at some intersection points.

[0020] According to a particularly preferred embodiment, the holes are arranged at the intersections of the channels.

[0021] Perforations at the intersections allow air to flow from the lower to the upper side of the molded foam section. The meandering arrangement of the domes causes air to accumulate at the intersections of the channels in front of the domes, creating localized overpressure zones. The perforations allow additional air to escape.

[0022] In a particularly preferred embodiment, the passage between the domes remains intact even when the vehicle seats are carrying passengers.

[0023] Because the convex domes are shaped like blunt-topped pyramids, they are compressed under load, causing the channels to narrow but still remain intact. This means that even under load, airflow can still pass through the channels, achieving ventilation for the seat area and / or backrest.

[0024] According to a particularly preferred embodiment, the recess has at least one outlet and / or one inlet for supply lines and / or discharge lines, and the vehicle seat is equipped with a pump device, through which fluid can be introduced into the recess via the supply line and / or discharged from the recess via the discharge line.

[0025] Fluid, particularly air, can be supplied to or discharged from the recess, starting from the inlet of the supply line entering the recess or the outlet of the discharge line exiting the recess. Optionally or additionally, water, whether in liquid or vapor form, can be supplied or discharged. A pumping device delivers the fluid into or out of the recess.

[0026] According to a particularly preferred embodiment, fluid can be guided through the channel to the hole, and through the hole from the lower side of the molded foam portion to the upper side of the molded foam portion, or can be discharged in the opposite direction.

[0027] Starting from the recess, fluid or air can flow through channels to orifices, and from there to the top of the molded foam section. Optionally or additionally, fluid (such as condensate) can be discharged from the top of the molded foam section through orifices, channels, and outlets. According to a preferred embodiment, the pump device can be used for both supplying and discharging fluid. The fluid can also be a combination of multiple fluids, such as air and water. Attached Figure Description

[0028] Other advantageous embodiments will become clear from the following description, taken in conjunction with the accompanying drawings. They are shown here: Figure 1 An overall view of the vehicle seats; Figure 2 An overall view of the vehicle seats; Figure 3 This is a cross-sectional side view of the vehicle seat. Figure 4 An exploded view of the seating area; Figure 5 This is an exploded view of the backrest; Figure 6a Isometric view of the molded foam section from below; Figure 6b A bottom view of the molded foam section; Figure 7 In the diagram, a is an isometric view of the molded foam section from the rear, and b is an enlarged view of the dome. Figure 8aA schematic diagram of airflow through the molded foam section; Figure 8b A schematic diagram of airflow through the molded foam section; and Figure 9 A three-dimensional view of the molded foam section under load. Detailed Implementation

[0029] For clarity, some reference marks have been omitted from the figure.

[0030] Figure 1 This diagram shows an overall view of the vehicle seat 1 of this application. The vehicle seat 1 can be divided into a vehicle seat base 5 and a vehicle seat upper structure 4 disposed on and supported thereon. The vehicle seat upper structure 4 includes a seat portion 2, which extends substantially parallel to the plane formed by the longitudinal direction X and the width direction Y. A backrest 3 is disposed on the seat portion 2, which extends substantially along the height direction Z and the width direction Y. The backrest 3 is arranged here, almost perpendicular to the seat portion 2, and the angle between the seat portion 2 and the backrest 3 can be changed by a rotating mechanism. A headrest (not shown here) may also be provided at the upper end of the backrest 3. Armrests or consoles (not shown here) may be provided on the sides of the seat portion 2 and the sides of the backrest 3. The vehicle seat base 5 is connected to the lower side of the vehicle body, and a spring device (not shown here) is provided at its lower part, enabling the vehicle seat upper structure 4 to achieve spring movement and height adjustment. Two adjustment rails 6 extending along the longitudinal direction X are provided above the spring device. By adjusting the track 6, the seat section 2 or the entire upper structure of the vehicle seat 4 can move longitudinally relative to the spring device or relative to a portion of the vehicle seat base 5 below the adjusting track 6.

[0031] The seat portion 2 is covered by a seat cover 7a, which covers the seat portion 2 at least on the upper side. Similarly, the backrest 3 is covered by a backrest cover 7b, which covers the backrest 3 at least on the front side and is usually fully covered.

[0032] Figure 2A general view of the vehicle seat 1 of this application is shown, wherein the seat cover 7a and backrest cover 7b have been removed. In the seat portion 2, a recess 9a is provided at the center of the seat surface 8a in contact with the passenger. The recess 9a of the seat portion is substantially rectangular. Similar to the seat portion 2, the backrest 3 also has a recess 9b, located at the center of the backrest surface 8b in contact with the passenger. The recess 9b of the backrest 3 is substantially elliptical. A molded foam portion 10a is provided within the recess 9a. The molded foam portion 10a precisely fits the recess 9a, making the molded foam portion 10a flush with the seat surface 8a. The same applies to the molded foam portion 10b provided in the recess 9b of the backrest 3. Both the molded foam portions 10a and 10b have holes 11 penetrating through them. For the molded foam portion 10a of the seat portion 2, the holes 11 are regularly arranged, while the molded foam portion 10b of the backrest 3 has an area 18 without holes 11. The arrangement of hole 11 is adapted to accommodate passengers.

[0033] Figure 3 A cross-sectional view of the vehicle seat 1 of this application is shown. The seat portion 2 is mounted on the vehicle seat base 5. The seat portion 2 includes a cushioning support 12a designed as a seat shell 12a. A seat cushion 13a is disposed within the seat shell 12a. A recess 9a is provided on the upper side of the seat cushion 13a. It can be seen that the recess 9a does not completely penetrate the seat cushion 13a, but only forms a depression on the surface. The upper sides of the seat cushion 13a and the molded foam portion 10a are covered by a cover 7a. The cover 7a is provided with a heating element 14 and a cut foam layer. The cut foam layer is used to protect and cover the molded foam portion 10a and the cushion portion 13a. The seat portion 2 can be heated by the heating element 14.

[0034] The backrest 3 has a cushioning support 12b in the form of a backrest shell 12b on the rear side. A backrest cushioning pad 13b is inserted into the backrest shell 12b and has a recess 9b on its front surface. Similar to the seat portion 2, the recess 9b does not completely penetrate the backrest cushioning pad 13b. A molded foam portion 10b is inserted into the recess 9b and its front surface is covered by a cushion cover 7b. Unlike the cushion cover 7a of the seat portion 2, the cover 7b does not have a heating element.

[0035] The lower and rear sides of the molded foam sections 10a and 10b each have a number of raised tops 15. These raised tops 15 are abutted against or supported by the respective cushioning pads 13a or 13b. Optionally, these raised tops 15 may also contact the cushioning support members 12a or 12b or the intermediate layer.

[0036] Figure 4An exploded view of the seat portion 2 is shown. A rectangular recess 9a is located in the center of the seat cushion 13a. An inlet / outlet opening 17 is provided on one side of the recess 9a. Optionally, the inlet / outlet opening 17 may also be provided on the lower side of the recess 9a of the cushion 13a. The inlet / outlet opening 17 is connected to a supply line / discharge line (not shown here) through which air is supplied to the recess 9a or water is drained from the recess 9a. Optionally, only one of the two functions may be performed.

[0037] As can be seen, the surface 8a of the seat cushion 13a is slightly convex. The molded foam portion 10a may also have one or more such contours. However, in general, the molded foam portion 10a is flexible enough to conform to the conventional contours defined by the seat cushion 13a or the recess 9a. The seat cover 7a completely covers the molded foam portion 10a and the seat cushion 13a, especially the upper side. The sides of the seat cushion 13a are also covered by the seat cover. Only the lower side is not covered by the cover 7a; the lower side of the seat cushion 13a rests against the cushioning support 12a.

[0038] The molded foam section 10a is designed as a rectangular plate. This molded foam section 10a has regularly arranged holes 11, which are arranged in a tetragonal Bravais lattice. The holes 11 penetrate the molded foam section 10a from top to bottom, that is, are arranged substantially perpendicular to the surface 8a of the seat cushion pad 13a. The lower side of the molded foam section has several raised tops 15 disposed in the space between the holes 11. Channels 16 are formed between the raised tops 15. Some channels 16 are parallel to the longitudinal direction X, and others are parallel to the width direction Y. The channels 16 continuously penetrate the entire molded foam section 10a.

[0039] Figure 5 An exploded view of the backrest 3 is shown. The backrest cushion 13b is concave to partially surround the upper body of the passenger. An elliptical recess 9b is provided in the backrest cushion 13b. Figure 4 Similarly, the middle seat 2 has a backrest cushion 13b with an inlet / outlet opening 17. However, it is not located on the side surface of the recess 9b, but on the rear surface. Since the inlet / outlet opening faces the passenger, the molded foam section 10b has a non-porous area 18. If this area 18 were not designed to be non-porous, air from the inlet / outlet opening would mainly escape locally from this area 18 and would not be distributed throughout the entire molded foam section 10b.

[0040] Unlike the molded foam portion 10a, which has a generally flat upper side, the front side of the molded foam portion 10b is generally concave. Except for the dome 15 itself, the rear side where the dome 15 is located is generally flat. The flat design of the rear side of the molded foam portion 10b and the complementary flat design of the recess 9b improve the airflow 24 through the channel of the molded foam portion 10b. The cover 7b completely covers the molded foam portion 10b and the backrest cushion 13b. The cover 7b is tubular and extends onto the backrest cushion support 12b, the backrest cushion 13b, and the molded foam portion 10b inserted into the recess 9b.

[0041] Figure 6a This is an isometric view of the lower side of the molded foam portion 10a of this application. The molded foam portion 10a can be divided into two parts, 19a and 19b, along the height direction Z. Part 19a is a full foam portion, extending across the entire width and length of the molded foam portion 10a except for the holes 11. The channel portion 19b, disposed below it along the height direction Z, includes convex tops 15 and channels 16 extending between the convex tops. The channel portion 19b is specifically used to distribute airflow from the inlet / outlet opening to the holes 11.

[0042] Figure 6b This is a bottom view of the molded foam section 10a. A Bravais lattice 20 is indicated above some convex tops 15. The convex tops 15 are generally located at lattice points 21 of the Bravais lattice 20. However, it can also be seen that the center of the convex top 15 is not exactly located at lattice point 21, but is offset. Due to the offset of the convex tops 15, the channels 16 formed between the convex tops 15 are also offset and therefore meander in a serpentine pattern. The offset of individual convex tops 15 is again regular and corresponds to a tetragonal Bravais lattice. Here, the offset of the convex tops 15 repeats once every three convex tops in the longitudinal direction X and the width direction Y. This is shown using a superordinate Bravais lattice 20b. The convex tops 15 surrounded by lattice points 21 of the superordinate Bravais lattice 20b form the basis of the lattice 20b.

[0043] The offset of the lattice points 21 ensures that the dome no longer has a strictly rectangular or square base, but rather a base with a parallelogram shape. Channels 16 extend in a mesh pattern throughout the molded foam section 10a. Channels 16, extending substantially along the width direction Y, intersect with channels 16 extending along the longitudinal direction X at intersection points 22. Holes 11 are located at these intersection points 22.

[0044] Figure 7 In the diagram, a is a rear view of the molded foam section 10b. Region 18 lacks the holes 11, domes 15, and channels 16, and is designed as a full foam section 19a. This region 18 is positioned opposite the inlet / outlet opening. Since this region 18 lacks the domes 15, it forms the inlet / outlet chamber 23.

[0045] Figure 7In the diagram, b is an enlarged isometric view of the convex dome 15 of this application. The convex dome 15 rises from the full foam portion 19a in the shape of a blunt-topped pyramid. This blunt-topped pyramid has a square base of length L1. Above the base region at a height H is a square top surface of length L2. The convex dome 15 forms a truncated pyramid. The ratio of height H to length L1 to length L2 is 1:2.5:1.5. In this design, the width B of the channel 16 corresponds to the height H of the convex dome 15. Preferably, the width B of the channel 16 is less than or equal to the height H of the convex dome 15. The space between the convex domes 15 is circular, so that the channel 16 extends in an arched form between the convex domes 15.

[0046] Figure 8a and Figure 8b A preferred airflow 24 through the molded foam section is schematically shown. Of course, the entire airflow 24 cannot be shown, so it is schematically shown using two branches 24a and 24b. Air is supplied to the inlet / outlet chamber 23 via a supply line, and from the inlet / outlet chamber 23, the airflow 24 branches into different branches 24a and 24b. Branches 24a and 24b follow the channel 16 to the next intersection 22. At intersection 22, the airflow 24 has four possible paths: one is straight forward, two is to the left, three is to the right, and four is through the orifice 11. The meandering path of the channel results in two preferred directions for the airflow 24: one is a clearly straight forward direction, and the other depends on the offset of the convex tops 15. If, due to the arrangement of the convex tops 15 (the next row of convex tops 15 is offset to the left of the previous row), the channel bends to the left at intersection 22, then the airflow 24 is clearly deflected to the right at the intersection. This means that only a very small proportion of the air is deflected in the direction of the channel bend. Conversely, if the channel bends to the right at intersection 22 (the next row of convex tops shifts to the right relative to the previous row), the airflow 24 deflects significantly to the left at intersection 22. When the different branches 24a and 24b of the airflow 24 meet, a congested area is formed, where the airflow preferentially escapes through the holes 11. This improves the guidance of the airflow 24 by the molded foam section 10a compared to a straight channel.

[0047] exist Figure 8b In the passage 16, air outlet 25 is marked by several holes 11. Air preferentially flows from bottom to top through these holes in the passage 16. The meandering of the passage 16 increases the number of holes 11 through which air preferentially flows and makes the flow velocity through the holes 11 more uniform, that is, makes the airflow smoother. Figure 8a and Figure 8b Similarly, airflow 24 can of course also flow in the reverse direction, with the inlet chamber serving as the outlet chamber 23. Temporary changes or reversals in the flow direction of airflow 24 caused by passenger or vehicle control systems are also possible. In this case, it is best to reverse the rotation direction of the pump (not shown here).

[0048] Figure 9A perspective view of the molded foam section under load is shown. Force F represents the load applied to the molded foam section 10a or 10b by a passenger sitting on the vehicle seat 1. Generally, the load F on the molded foam section 10a in the seat section 2 is greater than the load on the molded foam section 10b in the backrest 3. Under the action of load F, the dome 15 deforms, particularly compressing along the height direction Z. This causes the channel 16 to become smaller in the height direction Z, and also smaller in the longitudinal direction X or width direction Y, depending on the orientation of the channel 16. However, the blunt-topped pyramid shape of the dome ensures that the channel 16 remains intact as long as the dome 15 is not fully compressed, allowing airflow 24 to flow through the channel. Furthermore, the arched shape of the channel improves the stability of the molded foam sections 10a and 10b and reduces the deformation of the molded foam sections 10a and 10b under load F.

[0049] List of reference numerals 1 Vehicle Seat 2-seat section 3 Backrest 4. Upper structure of vehicle seats 5. Vehicle seat base 6 Adjustable Track 7a Seat Cover 7b Backrest Cover 8a Seat Surface 8b Backrest Surface 9a Seat Recess 9b Backrest Recess 10a Seat Section Molded Foam Section 10b Backrest Molded Foam Section 11 holes 12a Seat cushioning support 12b Backrest Cushion Support 13a Seat cushion 13b Backrest Cushion 14 heating elements 15 Convex Tops 16 channels 17. Inlet / Outlet Opening 18 regions 19a Full Foam Section 19b channel section 20a Bravais lattice 20b upper Bravais lattice 21-dot matrix 22 intersections 23 Entrance / Exit Room 24 airflow 24a airflow first branch 24b airflow second branch 25 air outlets Height of H-shaped dome Length of the base region of the L-shaped dome Length of the top area of ​​L2 dome B channel width F force X Vertical Y-width direction Z-axis (height direction)

Claims

1. A vehicle seat (1), comprising a seat portion (2) and / or a backrest (3), wherein the seat portion (2) and / or the backrest (3) comprises cushioning supports (12a, 12b), the cushioning supports comprising cushioning pads (13a, 13b) and pad covers (7a, 7b) at least partially surrounding the cushioning pads (13a, 13b), the cushioning pads (13a, 13b) having recesses (9a, 9b) facing the passenger, and at least partially plate-shaped molded foam portions (10a, 10b) inserted parallel to the surface of the cushioning pads (8a, 8b) into the recesses (9a, 9b). Its features are, The molded foam portion (10a, 10b) has a plurality of protrusions (15) and holes (11) extending perpendicularly to the surface (8a, 8b) of the cushioning pad, the protrusions (15) being spaced apart from each other, thereby forming a channel between the protrusions (15), at least a portion of the holes (11) being arranged in the channel (16), and at least a portion of the holes (11) penetrating the molded foam portion (10a, 10b).

2. The vehicle seat (1) as described in claim 1. Its features are, The convex dome (15) extends along the direction of the buffer support (12a, 12b) on the lower side of the molded foam portion (10a, 10b).

3. The vehicle seat (1) as described in claim 2. Its features are, The convex tops (15) are arranged in a lattice (20a, 20b) structure, wherein the lattice (20a, 20b) corresponds to a tetragonal Bravais lattice.

4. The vehicle seat (1) as described in claim 3. Its features are, The convex tops (15) of adjacent rows are arranged to be staggered from each other, wherein the channels (16) extend in a meandering manner between the convex tops (15).

5. The vehicle seat (1) as described in any of the preceding claims. Its features are, The convex top (15) is a blunt-topped pyramid shape, wherein the base area of ​​the convex top (15) is rectangular or square.

6. The vehicle seat (1) as described in any one of claims 1-4 above. Its features are, The channel (16) extends either parallel to the width direction (Y) or parallel to the longitudinal direction (X), wherein one channel intersects with multiple other channels at an intersection (22).

7. The vehicle seat (1) as described in claim 6. Its features are, The hole (11) is located at the intersection (22) of the channel (16).

8. The vehicle seat (1) as described in any one of claims 1-4 above. Its features are, Even when the vehicle seat (1) is carrying passengers, the passage (16) is maintained between the domes (15).

9. The vehicle seat (1) as described in any one of claims 1-4 above. Its features are, The recess (9a, 9b) has at least one outlet opening (17) and / or one inlet opening (17) for supply lines and / or discharge lines, and the vehicle seat (1) includes a pump device through which fluid can be introduced into the recess (9a, 9b) and / or through which fluid can be discharged from the recess (9a, 9b) through the discharge lines.

10. The vehicle seat (1) as described in claim 9. Its features are, The fluid can be guided through the channel (16) to the hole (11), and through the hole (11) from the lower side of the molded foam part (10a, 10b) to the upper side of the molded foam part (10a, 10b), or it can be discharged in the opposite direction.

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