Vehicle seat with molded foam insert

Abstract

Vehicle seat (1) comprising a seat section (2) and / or a back section (3), wherein the seat section (2) and / or the back section (3) have a cushion support (12a, 12b) with a cushion (13a, 13b) and a cushion cover (7a, 7b) at least partially enclosing the cushion (13a, 13b), the cushion (13a, 13b) having a recess (9a, 9b) facing an occupant into which a molded foam part (10a, 10b) that is at least partially plate-like is inserted parallel to a cushion surface (8a, 8b), wherein the molded foam part (10a, 10b) has a plurality of ridges (15) and holes (11) extending perpendicular to the cushion surface (8a, 8b), the ridges (15) being spaced apart from one another, forming channels (16) between the ridges (15). are, wherein at least some holes (11) are arranged in the channels (16), wherein at least some holes (11) pass through the molded foam part (10a, 10b), characterized in thatthat the battlements (15) are truncated pyramidal in shape, the base of the battlements (15) being rectangular or square.

Description

[0001] The invention relates to a vehicle seat with at least one seat section or back section. The seat or back section comprises a cushion support with a cushion and a cushion cover that at least partially encloses the cushion. Furthermore, the cushion has a recess facing an occupant, into which a molded foam element, at least partially plate-like, is inserted substantially parallel to a cushion surface.

[0002] Commercial vehicles, such as agricultural machinery, construction equipment, or transport vehicles, are typically used for extended periods at a time, which is why seating comfort for the occupant plays a crucial role. Accordingly, vehicle seats are equipped with a variety of comfort features, such as climate control systems. These include, among other things, a heating system to warm the seat and a ventilation system to cool it. The ventilation system consists of a fan to generate an airflow and a duct to supply the air.

[0003] Previously, vehicle seats featured seat surfaces and / or backrests made of an air-permeable spacer fabric, allowing air to flow through the seat and / or backrest to the occupant. This spacer fabric was inserted into a recess in the seat or back cushion. The ventilation system's duct also entered this recess, allowing air to be drawn through the spacer fabric by the fan. However, this spacer fabric is complex and expensive to manufacture, as it must have the same strength properties as the surrounding upholstery while remaining air-permeable. Furthermore, the airflow through the spacer fabric is undirected, resulting in uneven ventilation from the seat and / or backrest.This results in areas closer to the point where the supply line enters the recess receiving more air than areas further away.

[0004] Therefore, the object of the invention is to provide a vehicle seat in which the spacer fabric is replaced by a molded foam part that is easier to manufacture, has better cushioning properties and allows improved ventilation through a combination of holes and channels.

[0005] To solve the problem, a vehicle seat according to the invention is provided, comprising a seat section and / or a back section, wherein the seat section and / or the back section have a cushion support with a cushion and a cushion cover at least partially enclosing the cushion, and the cushion has a recess facing an occupant. An at least partially plate-like molded foam part is inserted into this recess, essentially parallel to a cushion surface. The molded foam part has a plurality of ridges and holes extending essentially perpendicular to the cushion surface. The ridges are spaced apart from one another, forming channels between them. At least some holes are arranged in the channels, with at least some holes passing through the molded foam part.

[0006] A vehicle seat typically consists of a lower seat section, which is bolted to the vehicle body, and an upper seat section positioned above it. The upper seat section comprises the seat cushion, which extends essentially in a longitudinal and lateral direction, and the backrest, which extends essentially in a lateral and vertical direction. The backrest is usually rotatable relative to the seat cushion in the lateral direction, allowing the angle between the two sections to be adjusted. Both the seat cushion and backrest have a supporting structure in the form of a cushion support. This support can be, for example, a seat or back shell or a frame structure. The cushion is attached to or rests on the support. A recess is provided in the cushion, facing the occupant.The recess can be as deep as the cushion, extending through the entire cushion, or it can only cover a portion of the cushion's depth. A molded foam insert is preferably fitted precisely into the recess. This insert is preferably flush with the cushion surface, ensuring that the molded foam insert does not create any unevenness on the cushion's surface. The molded foam insert can rest directly on the cushion support, the cushion itself, or an intermediate layer.

[0007] In one embodiment, the side of the molded foam part facing the occupant is smooth, as is typical for foam parts. Alternatively, the surface can also be provided with bumps or similar features.

[0008] According to a particularly preferred embodiment, the crenellations extend on the underside of the molded foam part in the direction of the cushion support.

[0009] The ridges ensure that the molded foam part does not lie flat against the padding, padding support, or an intermediate layer. Furthermore, the individual ridges are spaced apart from one another. The gaps between the ridges create channels. These channels preferably run continuously along both the longitudinal (vertical) and lateral directions. Deviations in their course can occur due to a specific shape or orientation of the molded foam part.

[0010] Since molded foam is typically not air-permeable, the foam component is perforated with holes that run from the top to the bottom. If the backrest incorporates the molded foam component, the term "top" should be replaced with "front" and "bottom" with "back." Therefore, everything that applies to the seat can also apply to the backrest, albeit with logically modified directional terms not explicitly mentioned here.

[0011] The holes are preferably arranged in the channels. Alternatively or additionally, holes can also be provided in the crenellations. The crenellations can have a crown-like shape at their tips, with gaps between the points. Alternatively, the holes can begin in the sides of the crenellations and then extend through the molded foam part parallel to the direction of the crenellations. Preferably, the holes in a molded foam part all run essentially parallel to each other, perpendicular to the surface of the molded foam part, i.e., in the vertical or longitudinal direction.

[0012] According to a particularly preferred embodiment, the crenellations are arranged in a grid structure, wherein the grid corresponds to a square Bravais grid.

[0013] The regular arrangement of the crenellations ensures a uniform flow through the channels. Furthermore, it improves the deformation behavior under the load of an occupant. In addition, the regular design allows for a consistent airflow through the channels.

[0014] According to a particularly preferred embodiment, adjacent rows of crenellations are arranged offset from one another, with the channels running serpentine between the crenellations.

[0015] Preferably, the crenellations are not arranged exactly at the grid points, but can be slightly offset from them. The crenellations are offset from the grid points by less than 30%, preferably less than 25%, and most preferably less than 20% of their extent. This offset of the individual crenellations results in the channels formed by the spaces between them running serpentine-like. Alternatively or additionally, some of the crenellations can be grouped into a base arranged according to a square Bravais grid.

[0016] The serpentine design ensures that the airflow does not pass through the channels unimpeded, but is slowed down and redirected at the staggered crenellations. Depending on the curvature of the channels, the airflow is guided along certain preferred directions. This improves the airflow characteristics, resulting in more even and pleasant ventilation.

[0017] According to a particularly preferred embodiment, the crenellations are shaped like a truncated pyramid, with the base of the crenellations being rectangular or square.

[0018] This design of the crenellations as truncated pyramids improves their stability under load. Furthermore, the essentially rectangular or square base is necessary for the proper formation of the channels. The edges of the crenellations also slow the airflow, which would not be the case with a round base. The crenellations are oriented so that they taper away from the molded foam part. The bases of two adjacent truncated pyramids are preferably rounded, so that the channel between the crenellations is arched.

[0019] According to a particularly preferred embodiment, the channels run either substantially parallel to a width direction or substantially to a length direction, with one channel crossing several other channels at intersection points.

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

[0021] The arrangement of the holes at the intersections allows air to pass from the underside of the molded foam part to the top. The serpentine arrangement of the crenellations causes the air to accumulate in front of the crenellations at the intersections of the channels, creating localized areas of overpressure. The holes also allow the air to escape.

[0022] According to a particularly preferred embodiment, the channels between the crenellations remain intact even when the vehicle seat is loaded by an occupant.

[0023] Due to the truncated pyramid shape of the crenellations, they are compressed under load, thus reducing the size of the channels, but they are nevertheless retained. This allows airflow to continue through the channels even under load, ensuring ventilation of the seat and / or backrest.

[0024] According to a particularly preferred embodiment, the recess has at least one outlet and / or one inlet of a supply line and / or a discharge line, and the vehicle seat has a pumping device, wherein a fluid can be introduced into the recess by the pumping device via the supply line and / or the fluid can be discharged from the recess by the pumping device via the discharge line.

[0025] Starting from the inlet where the supply line enters the recess, or the outlet where the discharge line begins to lead out of the recess, a fluid, in particular air, can be supplied to or removed from the recess. Alternatively or additionally, water, either liquid or as steam, can also be supplied to or removed. The pumping device transports the fluid into or out of the recess.

[0026] According to a particularly preferred embodiment, the fluid can be guided through the channels to the holes and through the holes from a bottom side of the molded foam part to the top side of the molded foam part, or can be drained in the opposite direction.

[0027] Starting from the recess, the fluid or air can flow through the channels to the holes and from there to the top of the molded foam part. Alternatively or additionally, the fluid, for example, condensation, can be transported from the top of the molded foam part through the holes, the channels, and the outlet. In a preferred embodiment, the pumping device can be used for both supplying and removing the fluid. The fluid can also be a combination of several fluids, for example, air and water.

[0028] Further advantageous embodiments are described in the dependent claims and the following description in conjunction with the drawing. These show: Fig. 1. A complete view of a vehicle seat; Fig. 2. A complete view of a vehicle seat; Fig. 3 a side view of a section through a vehicle seat; Fig. 4 an exploded view of a seat part; Fig. 5 an exploded view of a back panel; Fig. 6a an isometric view of a molded foam part from below; Fig. 6b a bottom view of a molded foam part; Fig. 7a an isometric view of a molded foam part from the rear; Fig. 7b an enlargement of a battlement; Fig. 8a a schematic representation of the airflow through a molded foam part; Fig. 8b a schematic representation of the airflow through a molded foam part and Fig. 9 a perspective view of a molded foam part under load.

[0029] For the sake of clarity, some reference symbols have been omitted from the figures.

[0030] The Fig. Figure 1 shows an overall view of a vehicle seat 1 according to the invention. The vehicle seat 1 can be divided into a vehicle seat base 5 and a vehicle seat superstructure 4 arranged above and supported by it. The vehicle seat superstructure 4 comprises a seat section 2, which extends substantially parallel to the plane defined by the longitudinal direction X and the lateral direction Y. A back section 3 is arranged on the seat section 2, extending substantially in the vertical direction Z and in the lateral direction Y. The back section 3 is arranged here almost at right angles to the seat section 2, the angle between the seat section 2 and the back section 3 being adjustable by a pivoting mechanism. A headrest, not shown here, can also be arranged at the upper end of the back section 3. Attachments such as armrests or consoles, not shown here, can be arranged laterally next to the seat section 2 and also laterally next to the back section 3.The vehicle seat base 5 is connected to the vehicle body at its underside. In its lower portion, the vehicle seat base 5 has a spring device (not visible here) that allows for spring movement and height adjustment of the vehicle seat assembly 4. Two adjustment rails 6 are arranged longitudinally X above the spring device. The seat section 2, or the entire vehicle seat assembly 4, can be moved longitudinally relative to the spring device or relative to the portion of the vehicle seat base 5 located below the adjustment rails by means of the adjustment rails 6.

[0031] The seat section 2 is covered with a seat cover 7a, which covers at least the upper part of the seat section 2. Likewise, the back section 3 is covered with a back cover 7b, which covers at least the front of the back section 3, but usually completely.

[0032] The Fig. Figure 2 shows an overall view of a vehicle seat 1 according to the invention, in which the seat cover 7a and the backrest cover 7b have been removed. A recess 9a is provided centrally in a seat surface 8a of the seat section 2, where an occupant stands in contact with the seat section 2. The recess 9a of the seat section is essentially rectangular. Similarly, the backrest 3 has a recess 9b centrally in a backrest surface 8b, where the occupant stands in contact with the backrest 3. The recess 9b of the backrest 3 is essentially oval. A molded foam part 10a is arranged in the recess 9a. The molded foam part 10a is fitted precisely into the recess 9a, so that the molded foam part 10a and the seat surface 8a are flush. The same applies to the molded foam part 10b, which is arranged in the recess 9b of the back part 3.The molded foam parts 10a and 10b have holes 11 that extend through the respective molded foam part. While the holes 11 are regularly arranged in the molded foam part 10a of the seat part 2, the molded foam part 10b of the back part 3 has an area 18 in which no holes 11 are arranged. The arrangement of the holes 11 is adapted to the occupant.

[0033] The Fig. Figure 3 shows a section through a vehicle seat 1 according to the invention. The seat part 2 is arranged on the vehicle seat base 5. The seat part 2 comprises a cushion support 12a, which is designed as a seat shell 12a. The seat cushion 13a is arranged in the seat shell 12a. The seat cushion 13a has a recess 9a on its upper surface. As can be seen, the recess 9a does not extend completely through the seat cushion 13a, and is therefore only superficially recessed. The seat cushion 13a and the molded foam part 10a are covered on their upper surfaces by the cover 7a. The cover 7a has a heating element 14 and a layer of cut foam. The cut foam serves as protection and a cover for the molded foam part 10a and the cushion part 13a. The seat part 2 can be heated by the heating element 14.

[0034] The back section 3 has a backrest support 12b in the form of a back shell 12b. The back cushion 13b is inserted into the back shell 12b and has a recess 9b on its front and surface. Similar to the seat section 2, the recess 9b does not extend through the back cushion 13b. The molded foam part 10b is inserted into the recess 9b and is covered on its front by the upholstery cover 7b. Unlike the upholstery cover 7a of the seat section 2, the cover 7b does not have a heating element.

[0035] The molded foam parts 10a and 10b have crenellations 15 on their underside and rear sides, respectively. The crenellations 15 rest on or are supported by the respective pads 13a or 13b. Alternatively, the crenellations 15 can also be in contact with the pad support 12a or 12b or an intermediate layer.

[0036] The Fig. Figure 4 shows an exploded view of the seat section 2. A rectangular recess 9a is located centrally in the seat cushion 13a. An inlet / outlet opening 17 is located on one side of the recess 9a. Alternatively, the inlet / outlet opening 17 can also be located on the underside of the recess 9a in the cushion 13a. The inlet / outlet opening 17 is connected to a supply / outlet line (not shown) through which air is supplied to the recess 9a and water is drained from the recess 9a. Alternatively, only one of these two functions can be implemented.

[0037] As can be seen, the surface 8a of the seat cushion 13a is slightly convex. The molded foam part 10a may also have such contours. In general, however, the molded foam part 10a is sufficiently flexible to adapt to the usual contours defined by the seat cushion 13a or the recess 9a. The seat cover 7a completely covers the molded foam part 10a and, in particular, the upper surface of the seat cushion 13a. The side surfaces of the seat cushion 13a are also covered by the seat cover. Only the underside is not covered by the cover 7a; however, the underside of the seat cushion 13a rests on the cushion support 12a.

[0038] The molded foam part 10a is designed as a rectangular plate. The molded foam part 10a is further provided with a regular arrangement of holes 11, arranged according to a square Bravais grid. The holes 11 penetrate the molded foam part 10a from the top to the bottom, and are thus arranged essentially perpendicular to the surface 8a of the seat cushion 13a. On its underside, the molded foam part has crenellations 15, which are arranged in the spaces between the holes 11. Channels 16 are formed between the crenellations 15. Some of the channels 16 run parallel to the longitudinal direction X, and others run parallel to the transverse direction Y. The channels 16 extend continuously through the entire molded foam part 10a.

[0039] The Fig. Figure 5 shows an exploded view of the backrest section 3. The back cushion 13b is concave to partially enclose the upper body of an occupant. The oval-shaped recess 9b is arranged in the back cushion 13b. Analogous to the seat section 2 of the Fig. 4. The backrest cushion 13b has an inlet / outlet opening 17. However, this is not recessed in a side surface of the recess 9b, but rather in the back. Because the inlet / outlet opening faces the occupant, the molded foam part 10b has a perforated area 18. If the area 18 were not perforated, the air from the inlet / outlet opening would escape mainly locally through the area 18 and would not be distributed throughout the entire molded foam part 10b.

[0040] In contrast to the molded foam part 10a, which is essentially flat on its upper surface, the front of the molded foam part 10b is essentially concave. The back side, which is provided with the crenellations 15, is essentially flat, with the exception of the crenellations 15, of course. The flat design of the back side of the molded foam part 10b, and complementarily the flat design of the recess 9b, improve the airflow 24 through the channels of the molded foam part 10b. The cover 7b completely covers the molded foam part 10b and the back cushion 13b. The cover 7b is tubular in shape and is pulled over the back cushion support 12b, the back cushion 13b, and the molded foam part 10b inserted into the recess 9b.

[0041] The Fig. Figure 6a shows an isometric view of the underside of a molded foam part 10a according to the invention. The molded foam part 10a can be divided into two sections 19a and 19b along the vertical direction Z. Section 19a is a solid foam section that extends over the entire width and length of the molded foam part 10a, with the exception of the holes 11. The channel section 19b, arranged below it in the vertical direction Z, comprises the ridges 15 and the channels 16 running between the ridges. The channel section 19b serves in particular to distribute the airflow from the inlet / outlet opening to the holes 11.

[0042] The Fig. Figure 6b shows the molded foam part 10a in a bottom view. The Bravais grid 20 is indicated over some of the crenellations 15. The crenellations 15 are essentially located at the grid points 21 of the Bravais grid 20. However, it is also evident that the centers of the crenellations 15 do not lie exactly on the grid points 21, but deviate from them. Due to the displacement of the crenellations 15, the channels 16 formed between the crenellations 15 are also displaced, so that they run in a serpentine pattern. The displacement of the individual crenellations 15 is again regular and corresponds to a square Bravais grid. Here, the displacement of the crenellations 15 is repeated every third crenellation in the longitudinal direction X and the transverse direction Y. This is shown with the help of the higher-level Bravais grid 20b. The crenellations 15 enclosed between the grid points 21 of the higher-level Bravais grid 20b form the basis of the grid 20b.

[0043] The displacement of the grid points 21 ensures that the crenellations no longer have a strictly rectangular or square base, but rather a parallelogram-like base. The channels 16 run in a network pattern over the entire molded foam part 10a. The channels 16 that run essentially along the width direction Y intersect the channels 16 that run along the length direction X at intersection points 22. The holes 11 are arranged at these intersection points 22.

[0044] The Fig. Figure 7a shows a rear view of the molded foam part 10b. Area 18 is formed as a solid foam section 19a, free of holes 11, crenellations 15, and channels 16. Area 18 is located opposite the inlet / outlet opening. Since area 18 is free of crenellations 15, it forms an inlet / outlet chamber 23.

[0045] The Fig. Figure 7b shows an enlarged isometric view of a crenellation 15 according to the invention. The crenellation 15 rises as a truncated pyramid from the solid foam section 19a. The truncated pyramid has a square base with length L1. Above the base, at height H, the square top surface with length L2 is arranged. The crenellation 15 thus forms a right truncated pyramid. The ratio of height H to length L1 to length L2 is 1:2.5:1.5. In this embodiment, the width B of the channel 16 corresponds to the height H of the crenellations 15. Preferably, the width B of the channel 16 is less than or equal to the height H of the crenellations 15. The spaces between the crenellations 15 are rounded so that the channels 16 run arched between the crenellations 15.

[0046] The Fig. 8a and Fig. Figure 8b schematically shows the preferred airflow 24 through the molded foam part. Naturally, the entire airflow 24 cannot be shown, which is why it is schematically represented by two branches 24a and 24b. Starting from the inlet / outlet chamber 23, where air is introduced through a supply line, the airflow 24 divides into different branches 24a and 24b. Branches 24a and 24b follow the channels 16 to the next intersection point 22. At the intersection points 22, the airflow 24 has four possible paths: straight ahead, to the left, to the right, and through the hole 11. The serpentine course of the channels results in two preferred directions for the airflow 24. One is the obvious direction straight ahead, and the second depends on the displacement of the crenellations 15.If the channel is curved to the left at the intersection point 22 due to the arrangement of the crenellations 15 (the next row of crenellations 15 is shifted to the left of the previous row), the airflow 24 is deflected significantly to the right at the intersection point. This means that only a negligible fraction of the air is deflected in the direction in which the channel is curved. Conversely, if the channel is curved to the right at the intersection point 22 (the next row of crenellations is shifted to the right of the previous row), the airflow 24 is deflected significantly to the left at the intersection point 22. If different branches 24a and 24b of the airflows 24 meet, stagnation zones are created in which the airflow preferentially escapes through the holes 11. Compared to straight channels, this improves the guidance of the airflow 24 by the molded foam part 10a.

[0047] In the Fig. In Figure 8b, the air outlet 25 is indicated by several holes 11. Air from the channels 16 preferentially flows through these holes from the underside to the top side. The serpentine shape of the channels 16 increases the number of holes 11 through which the air preferentially flows and homogenizes the flow rate through the holes 11, meaning the air flows more evenly. This is analogous to the representation in the Fig. 8a and Fig. 8b The airflow 24 can of course also flow in reverse and the inlet chamber 23 can be used as the outlet chamber 23. A reversal between the flow directions of the airflow 24, either alternating over time or triggered by the occupant or a vehicle control system, is also provided. Preferably, the direction of rotation of a pump (not shown here) is reversed.

[0048] The Fig.Figure 9 shows the molded foam part in a perspective view under load. The force F represents an occupant seated in a vehicle seat 1, who is applying pressure to the molded foam part 10a or 10b. Typically, the load F on a molded foam part 10a in the seat section 2 is greater than on a molded foam part 10b in the backrest section 3. Under the load F, the crenellations 15 deform, particularly by being compressed along the vertical direction Z. This causes the channels 16 to become smaller both vertically Z and, depending on the orientation of the channel 16, longitudinally X or laterally Y. However, the truncated pyramid shape of the crenellations ensures that, as long as the crenellations 15 are not completely compressed, the channels 16 remain intact, allowing the airflow 24 to pass through them.In addition, the arched shape of the channels improves the stability of the molded foam part 10a, 10b and reduces deformation of the molded foam part 10a, 10b under the load F. Reference symbol list 1 vehicle seat 2 Seat section 3 Back section 4 Vehicle seat structure 5 Vehicle seat base 6 adjustment rails 7a Seat cover 7b Back cover 8a Seat area 8b Lean-to area 9a Recess in the seat part 9b Cutout in the back 10a Molded foam part in the seat part 10b Molded foam part in the back section 11 holes 12a Seat cushion support 12b Backrest padding 13a Seat cushion 13b Padding in the backrest 14 Heating element 15 turrets 16-channel 17 Inlet / Outlet Area 18 19a Full foam section 19b Canal section 20a Bravais Grid 20b Superior Bravais Grid 21 grid point 22 intersection points 23 Inlet chamber / Exit chamber 24 Airflow 24a first branch of the airflow 24b second branch of the airflow 25 Air outlet H Height of a battlement L1 Length of the base of a battlement L2 Length of the top surface of a battlement B Width of a channel F force X Longitudinal direction Y Latitude direction Z Altitude direction

Claims

Vehicle seat (1), comprising a seat part (2) and / or a back part (3), wherein the seat part (2) and / or the back part (3) have a cushion support (12a, 12b) with a cushion (13a, 13b) and a cushion cover (7a, 7b) at least partially enclosing the cushion (13a, 13b), the cushion (13a, 13b) having a recess (9a, 9b) facing an occupant into which a molded foam part (10a, 10b) that is at least partially plate-like is inserted substantially parallel to a cushion surface (8a, 8b), characterized in that the molded foam part (10a, 10b) has a plurality of ridges (15) and holes (11) which extend substantially perpendicular to the cushion surface (8a, 8b), wherein the ridges (15) are spaced apart from one another, whereby between the ridges (15) channels are formed, wherein at least some holes (11) are arranged in the channels (16), wherein at least some holes (11) pass through the molded foam part (10a, 10b). Vehicle seat (1) according to claim 1, characterized in that the crenellations (15) extend on the underside of the molded foam part (10a, 10b) in the direction of the upholstery support (12a, 12b). Vehicle seat (1) according to claim 2 , characterized in that the crenellations (15) are arranged in a grid structure (20a, 20b) wherein the grid (20a, 20b) corresponds to a square Bravais grid. Vehicle seat (1) according to claim 3, characterized in that adjacent rows of crenellations (15) are arranged offset from one another, wherein the channels (16) run serpentine between the crenellations (15). Vehicle seat (1) according to one of the preceding claims, characterized in that the crenellations (15) are truncated pyramidal in shape, wherein the base of the crenellations (15) is rectangular or square. Vehicle seat (1) according to one of the preceding claims, characterized in that the channels (16) run either substantially parallel to a width direction (Y) or substantially to a length direction (X), wherein one channel (16) crosses several other channels (16) at intersection points (22). Vehicle seat (1) according to claim 6, characterized in that holes (11) are arranged at the intersection points (22) of the channels (16). Vehicle seat (1) according to one of the preceding claims, characterized in that the channels (16) between the crenellations (15) remain intact even under a load on the vehicle seat (1) by an occupant. Vehicle seat (1) according to one of the preceding claims, characterized in that the recess (9a, 9b) has at least one outlet (17) and / or one inlet (17) of a supply line and / or a discharge line and the vehicle seat (1) has a pumping device, wherein a fluid can be introduced into the recess (9a, 9b) by the pumping device via the supply line and / or the fluid can be discharged from the recess (9a, 9b) by the pumping device via the discharge line. Vehicle seat (1) according to claim 9, characterized in that the fluid can be directed through the channels (16) to the holes (11) and through the holes (11) from a bottom side of the molded foam part (10a, 10b) to the top side of the molded foam part (10a, 10b), or can be directed in the opposite direction.

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