Child seat system for placing child as infant or child

Abstract

The present disclosure relates to a child seat system (100) for placing a child, the child being a baby or a child, the child seat system (100) comprising:-a seat base (200) comprising a seat base surface (201) on which a child can be placed and a seat base frame (202) supporting the seat base surface (201), and the seat base frame (202) is configured such that it provides an accessible storage volume (203) delimited by a boundary region of the seat base frame (202); -an annular seat support (300) removably mounted at the seat base (200), while the annular seat support (300) is configured such that, in the mounted state, a child resting on the seat base surface (201) is supported by a normal central axis (N) around the seat base surface (201), and the seat base surface (201) is supported by the annular seat support (300), and the annular seat support (300) is supported by the annular seat support (300), the annular seat support (300) being supported by the annular seat support (300), the annular seat support (300) being supported by the annular seat support (300). The annular seat support (300), in particular in a plane perpendicular to the normal central axis (N) of the seat base surface (201), is circumferentially surrounded, while the annular seat support (300) is further configured such that it can be completely inserted into the provided storage volume (203); -a tray (400) removably mounted to the annular seat support (300) for operation in a working position and removably mounted to the seat base (200) for operation in a storage position in which the tray (400) limits the storage volume (203) to an additional boundary area. A flexible child seat system is thus provided which is suitable for children of various sizes and ages and provides an improved configuration in terms of portability.

Description

Technical Field

[0001] The present disclosure relates to a child seat system for positioning a child, such as an infant or a toddler. Background Art

[0002] In order to safely place a child in a certain environment (e.g., on the floor, on a table, on a chair, etc.), in particular during mealtimes, seats for children (respectively chairs) are known. Such chairs can be configured as high chairs, booster chairs, or baby safety booster chairs, or have other configurations.

[0003] Typically, each chair is suitable for children of a specific age range, such as infants or toddlers. In the context of this patent application, infants refer to children one year old or younger, while toddlers refer to children between one and five years old. Due to the different needs of infants and toddlers, different chair configurations exist for children in the infant and toddler stages.

[0004] Many existing chairs designed for children do not fully meet the needs of parents or caregivers. Several different types of chairs are often used, particularly in different positions, such as on the floor during playtime or at the table during dining. These include, for example, stand-alone high chairs, booster seats, table-attached chairs, and the like. Using several chairs for a given child is expensive, and these chairs are typically designed for children within a specific age or size range. If a child falls outside this age range, a new chair that reflects the needs of the grown child is needed.

[0005] Young infants are known to have different growth needs than older children. For example, infants between four and five months are supported sitters who can only sit up with assistance. Around six to seven months, infants begin to gain the ability to sit independently. Around eight to eleven months, infants gain the ability to stand and feed themselves. By the time they are two years old, children have developed the ability to sit independently in booster seats and child seats.

[0006] Many currently available chairs or seats for five-month-old infants are too small and too restrictive for two-year-old children. In addition, smaller infants require a chair that is relatively rigid and constructed to provide the necessary support and safety. The tight fit of the child by the seat (e.g., by the corresponding supports) acts as an additional safety feature in limiting the child's movement, especially in preventing the child from sliding or falling from the chair. In addition, such tight-fitting supports help to clean up in the event of food spills. Young children (especially older children aged two years or more) may find these chairs that include corresponding supports too restrictive and uncomfortable. Therefore, different chairs are needed for children of different ages and sizes.

[0007] CN202027224 - U discloses an exemplary high - chair for children's meals, which includes a frame, a chair seat and a dinner plate, where the dinner plate is used to hold food or other items. The chair seat is arranged on the frame, the dinner plate is detachably arranged on the chair seat, a clamping structure is provided on the back side of the dinner plate, and the clamping structure is clamped with the frame. The utility model points out that the proposed dining chair should have a simple structure, be safe, and be easy to store when it is disassembled.

[0008] However, the proposed chair is still relatively complex in its construction, it is difficult to disassemble, and it has obvious disadvantages in terms of portability and mobility due to its size. In addition, the chair is not flexible for use by older children who have outgrown the baby stage and require fewer safety features.

[0009] US20170119172 discloses another chair for children, which shows a booster seat including a storage compartment for the tray and / or a storage compartment for the securing straps. The securing - strap storage compartment may be formed in the base and includes an access opening having a closure for holding the securing straps in the compartment. A base plate may be provided for stability and support.

[0010] The chair proposed in US20170119172 discloses a more compact construction, which improves the portability of the chair. However, this chair still offers a low level of flexibility because this chair can only be used as a booster seat for children in a specific age range.

[0011] US20190365118 discloses a chair that is more flexible in terms of the usability of children in a wider age range. It provides an improved children's seat that allows for easier cleaning and is suitable for children of various sizes and ages. Such a children's seat may include features such as a removable seat bottom plate, which has an upward - curved edge to keep debris within the seat bottom plate and allows for easy cleaning. The seat bottom plate can be removed to expand the chair for growing children to fit within the children's seat. For additional flexibility, the children's seat may incorporate a height - adjustment mechanism to support the seat and match the child's stature. The height - adjustment mechanism can also be used to clamp the children's seat to a tabletop.

[0012] The chair has high flexibility in terms of use for children of various sizes and ages. However, it has the disadvantage of being constructed of a large number of components, which causes problems in terms of the portability, transportation, and storage of these components when some of these components are not needed.

[0013] The object of the present invention is to provide a flexible children's seat system that is suitable for children of different sizes and ages and provides an improved construction in terms of portability. Summary of the Invention

[0014] The above problems are solved by the features of the independent claims. It should be understood that an independent claim of one claim category can be formed analogously to a dependent claim of another claim category. Further embodiments of the present disclosure are the subject matter of additional dependent claims and the subject matter of the following description with reference to the accompanying drawings.

[0015] Accordingly, there is provided a child seat system for placing a child, in particular a dining child seat system, the child being an infant or a toddler, the child seat system comprising: a seat base including a seat base surface on which a child can be placed (in particular in the front side direction) and a (in particular annular) seat base frame supporting the seat base surface, however the seat base frame is configured such that it provides an accessible storage volume limited by a boundary region of the seat base frame. Further, the child seat system comprises: an annular seat support removably mounted at the seat base, however the annular seat support is configured such that in the installed state, a child placed on the seat base surface is circumferentially surrounded by the annular seat support about a normal central axis of the seat base surface, in particular in a plane perpendicular to the normal central axis of the seat base surface, however the annular seat support is further configured such that it can be fully inserted into the provided storage volume; a tray removably mounted on the annular seat support for operation in a working position and removably mounted to the seat base for operation in a storage position, however in the storage position, the tray limits the storage volume to an additional boundary region.

[0016] The proposed child seat system has a modular construction since the seat base, the seat base in combination with the annular seat support, and the seat base in combination with the annular seat support and the tray can be used independently. This has the effect that the chair can be adapted to the requirements of children of different sizes and ages, in particular infants and toddlers. Thus, such a child seat system provides a high level of flexibility to adapt the seat to the specific age and / or size needs of the child. Accordingly, the cost of different chairs due to the growth of the child can be reduced since the proposed child seat system can be used over a relatively long age range of the child, in particular for example from a few months to several years of age.

[0017] Furthermore, the child seat system is highly compact as the annular seat support can be stored in the storage volume provided by the seat base. This is advantageous if the child grows and the annular seat support and tray are no longer used due to the child's growth. Since the annular seat support fits exactly into the volume provided by the seat base, no additional space is required. In the installed state, the annular seat support circumferentially surrounds the child located on the surface of the seat base about the longitudinal axis of the child.

[0018] It is particularly advantageous if the annular seat support is configured to surround the child located on the surface of the seat base about the normal central axis of the seat base surface. The normal central axis of the seat base surface is generally parallel to the longitudinal axis of the child located on the surface of the seat base. The central axis is arranged in the normal direction, i.e., in the normal direction of the seat base surface, which is perpendicular to the seat base surface.

[0019] This compact construction is also advantageous in terms of portability or mobility. When the child seat system needs to be transported, the child seat system provides a compact transport container for itself.

[0020] The child seat system itself is a main component of a flexible and modular child seat system, especially providing storage volume for all components. This reduces the possibility of loss or damage of unused components. It also provides the possibility of storing other components of the child seat system or other devices commonly used for the child seat system, such as cushions, drinking bottles, paper towels, plates, cups, etc.

[0021] According to the proposed child seat system, the tray not only has a function in its working position, which is the function of supporting plates, food, toys, etc. The tray also has a function when it is arranged in the storage position. In the storage position, the tray serves as a lid (corresponding covering) to limit the storage volume provided by the seat base frame. In the storage position, the tray protects the components arranged in the volume and prevents them from falling out. At the same time, the tray itself is effectively stored in the storage position. This provides a compact and effective construction, which in particular also enables an easily portable and mobile child seat system.

[0022] The child seat system includes a seat base. The separate seat base can be considered a booster seat. The seat base includes an area where the child is to be placed if the seat is in use, in particular positioned thereon by sitting. This area is the area on which the child should be positioned and is to be considered the seat base surface. The seat base surface is arranged such that a child sitting on the seat base surface is generally in an upright position, i.e., the seat base surface is generally horizontally oriented during use. Thus, when the seat base is in operation, the normal direction of the seat base surface is generally the vertical direction, and thus when the child is located on the seat base surface, this normal direction is generally parallel to the longitudinal axis of the child.

[0023] Furthermore, the child can be positioned on the seat in a specific direction, e.g., from the direction from which food is served. This side can be considered the front side. The seat base can be constructed to support the child in a specific position on the seat, e.g., for the child's legs or by raising an edge portion included in the seat base. This orientation of the child relative to the seat base is particularly relevant if the seat base is used in combination with an annular seat support and a tray. Generally, the tray is arranged on the front side of the child seat system, and the annular seat support is constructed to provide space for the legs of the positioned child in the front side direction.

[0024] The seat base frame supports the seat base surface. This means that the seat base frame receives the weight of the child placed on the seat base surface. The seat base frame can be placed on a chair, a table, the floor or elsewhere. The seat base surface can be raised relative to the support structure on which the seat base frame is located. This allows the seat base itself to be used as a booster seat. The seat base frame can be of an annular shape, thus increasing the mechanical stability of the seat base frame for receiving the weight of the child. The seat base surface can be connected to the seat base frame separately or can also be constructed as part of the seat base frame.

[0025] The seat base has a construction that allows for providing and restricting the provided storage volume. This restriction of the storage volume is provided by the boundary area of the seat base frame. Also, the seat base surface can provide a boundary area for restricting the storage volume. Such a seat base frame can include a closed surface, such as a thick wall; and a grid-like structure or other constructions are also possible, which allow defining an accessible and usable storage volume in which the annular seat support can be stored. The boundary area does not have to be a continuous surface but should be constructed to prevent the annular seat support and potentially other items stored in the storage volume from falling out during the use or transportation of the child seat system.

[0026] The child seat system further comprises an annular seat support removably mounted on the seat base. The annular seat support is configured such that, in the installed state, a child placed on the surface of the seat base is surrounded by the annular seat support, in particular in a plane perpendicular to the normal direction of the seat base surface. This means that the child is circumferentially surrounded by the annular seat support. This provides a safe arrangement for the child, and in addition the annular seat support can be used by the child for stability or balancing purposes.

[0027] The annular seat support can be used in particular for infants until the infant is able to sit stably on its own. Thus, if the child is still in the infant stage, the use of the annular seat support is particularly advantageous, however, it can also be used at a later age stage.

[0028] The seat base and the annular seat support are aligned in their construction such that the annular seat support can be fully inserted into the storage volume provided by the seat base frame.

[0029] When the annular seat support is stored in the storage volume of the seat base, the annular seat support can be considered to be in the storage position. When the annular seat support is mounted on the seat base, the annular seat support can be considered to be in the working position.

[0030] The child system further comprises a tray removably mounted to the annular seat support. When the tray is mounted to the annular seat support, the tray is arranged in the working position, thereby allowing the child or a caregiver to use the tray. The tray can be used for, for example, playing with toys, dining, providing food, etc. The working position of the tray is typically arranged in a horizontal position, i.e., in a plane perpendicular to the normal direction of the seat base (correspondingly perpendicular to the longitudinal axis of the child).

[0031] In addition, the tray is also removably mounted to the seat base. If the tray is mounted to the seat base, in particular to the seat base frame, the tray can be arranged in the storage position. If the tray is arranged in the storage position, the tray limits the storage volume by a corresponding boundary region (usually its working surface or the surface opposite the working surface of the tray). The seat base frame and the tray are configured such that the annular seat support can be fully inserted into the storage volume, and in the case where the annular seat support is fully located in the storage volume, the tray can act as a lid or cover for the storage volume.

[0032] Preferably, the tray is configured such that the working side of the tray (i.e., the side on which, for example, toys, food are placed for use in the working position) faces the said volume in the storage position.

[0033] Advantageously, the tray can be mounted at the end of the seat base, in particular at the end of the seat base frame that is arranged opposite the seat base surface. During operation of the seat base, this end will correspond to the underside of the seat base. This arrangement of the tray at the seat base frame allows maximizing the available volume limited by the seat base and the tray.

[0034] In another embodiment of the child seat system, the seat base is constructed as one piece, and the storage volume is limited by the boundary region between the seat base surface and the seat base frame. Constructing the seat base such that it is provided as one piece allows for a stable and at the same time light construction of the seat base. Additionally, if the seat base is constructed as one piece, there is no need for maintenance of the seat base, such as checking screws or other fastening elements. The same advantages exist if the annular seat support is constructed as one piece. Preferably, the seat base and the annular seat support are each constructed as one piece.

[0035] In another embodiment of the child seat system, the annular seat support is constructed to have a hollow frustum - like conical shape including lateral support walls, however the annular seat support of the hollow frustum - like conical shape includes a seat support top edge and a seat support bottom edge in the normal direction of the seat base surface in the mounted state, however the seat support volume is defined by the space arranged between the seat support top edge and the seat support bottom edge, however the seat base frame is constructed to have a hollow frustum - like conical shape including lateral frame walls, however the hollow frustum - like conical shape of the seat base frame includes a frame top edge and a frame bottom edge in the normal direction, however the frame volume is defined by the space arranged between the frame top edge and the frame bottom edge, and the frame volume is larger than the seat support volume.

[0036] If the frame volume is larger than the seat support volume, the seat support can be completely placed in the storage volume provided by the seat base frame. It is particularly advantageous if the maximum distance of the frame top edge from the frame bottom edge in the normal direction is equal to or greater than the maximum distance of the seat support top edge from the seat support bottom edge.

[0037] The hollow frustum - like conical shape of the annular seat support and the hollow frustum - like conical shape of the seat base frame can each preferably be constructed to have a symmetric cross - section in a plane perpendicular to the normal direction of the seat base surface.

[0038] The cross-sectional shape can be, for example, circular, oval, rectangular, triangular or have other shapes, in particular shapes including rounded corners and / or curved portions. In a particular embodiment, the hollow annular seat support having a frustoconical shape can have a cross-sectional shape similar to a four-leaf clover.

[0039] In a preferred embodiment, the maximum extension of the annular seat support in the normal direction N is smaller than the maximum extension of the seat base frame in the normal direction N.

[0040] Due to the hollow, frustoconical shape of the annular seat support and the hollow, frustoconical shape of the seat base frame, the diameter of the cross section generally varies in the normal direction. For example, the cross section of the annular seat support or the seat base frame, respectively, may increase (in particular linearly or in steps) or decrease (in particular linearly or in steps) in a direction away from the seat base surface. In a particular embodiment, the diameter of the cross section may be constant in the normal direction.

[0041] The increasing diameter of the hollow, frusto-conical, annular seat support's cross-section in a direction away from the normal to the seat base surface is advantageous because it collects objects that have fallen or been handled uncoordinatedly by children. These could be toys, food, plates, cutlery such as spoons, and the like. Thus, this seat support shape acts as a funnel. Furthermore, it facilitates positioning a child on the seat base surface when the seat support is mounted on the seat base. The funnel shape facilitates child insertion due to the increased cross-section at the top edge of the seat support, guiding the child into the annular seat support toward the seat base surface where the child will be positioned.

[0042] The reduction in the diameter of the cross-section of the hollow, frustoconical-shaped annular seat support in a direction away from the normal to the seat base surface is advantageous because it allows for a tighter or more closed fit around the child. In other words, the child's freedom of movement is reduced, thereby allowing the child to have more secure stability and increasing the safety aspect of the chair.

[0043] Preferably, the shape of the hollow, frustoconical-shaped, annular seat support and the shape of the hollow, frustoconical-shaped seat base frame correspond to one another. For example, the cross-section of the hollow, frustoconical-shaped, annular seat support and the shape of the hollow, frustoconical-shaped seat base frame may have the same shape, but may have different dimensions. The dimensional relationship of the cross-sections may be configured such that the hollow, frustoconical-shaped, annular seat support can be inserted into the frame volume, particularly in a guided manner, although guidance may be provided by the side walls of the annular seat support and the seat base frame being adapted to one another.

[0044] For example, the seat base frame and the annular seat support may each have the shape of a hollow truncated tetrahedron, however, the seat support volume defined by the annular seat support is smaller than the frame volume defined by the seat base frame. The side lengths of the corresponding hollow truncated tetrahedron may be configured such that the annular seat support of the hollow truncated tetrahedron shape fits into the seat base frame of the hollow truncated tetrahedron. When arranged in the storage position, the distance between the walls of these hollow truncated tetrahedrons may be configured to be less than 1 cm, especially less than 0.5 cm, especially less than 0.1 cm.

[0045] Advantageously, the shape of the hollow frustum-like shape may vary circumferentially in its extension (corresponding length) in the normal direction. In the context of this document, circumferential variation means that the variation in extension can be provided in the circumferential direction around the normal central axis, which is the axis passing through the center of the seat base surface in the normal direction.

[0046] For example, compared to the rear part, especially compared to the length of the lateral frame wall in the normal direction at the rear part, the annular seat support of the hollow frustum-like shape may have a smaller extension in the normal direction (especially the length of the lateral frame wall) at the front part. This allows for a variable shape of the annular seat support and an opening structure for positioning a child's legs, for example. Additionally or alternatively, compared to the side part and / or the rear part, especially compared to the length of the lateral frame wall in the normal direction at the side part and / or the rear part, the seat base frame of the hollow frustum-like shape may have a smaller extension in the normal direction (especially a smaller length of the lateral frame wall) at the front part. This allows for a variable shape of the seat base frame, for example, the seat base frame is raised in the normal direction at the side part and / or the rear part by the seat base surface.

[0047] In another advantageous embodiment of the child seat system, the lateral support wall is configured to have an inclination angle with respect to a plane perpendicular to the normal direction of the seat base surface, however, the lateral frame wall is configured to have an inclination angle with respect to the same plane, however, the minimum angle difference from the plane to the lateral support wall deviates from the minimum angle difference from the plane to the lateral frame wall by at most + / - 20 degrees.

[0048] This has the following effect, especially in combination with a correspondingly selected cross-section of the hollow frustum-like annular seat support and the hollow frustum-like seat base frame, a highly compact storage state inside the frame volume can be achieved because the inclination of the side walls is compatible.

[0049] To determine the minimum tilt angle through the respective plane, the outer surface of the lateral frame wall or the inner surface of the lateral frame wall may be considered. The outer surface of the lateral frame wall is the surface facing away from the storage volume, while the inner surface of the lateral frame wall is the surface facing towards the storage volume.

[0050] Preferably, the minimum angular difference between the annular seat support and the seat base frame is substantially constant in the normal direction. However, if the minimum tilt angle varies in the normal direction, the average value is also used as the minimum angular difference.

[0051] Furthermore, it is advantageous if the minimum tilt angle or the lateral support wall and / or the lateral frame wall is substantially constant in the circumferential direction around the normal central axis, i.e., in particular, all sides of the hollow frustum-like shape of the annular seat support and / or the seat base frame may each have substantially the same minimum tilt angle through the plane.

[0052] Accordingly, as the minimum tilt angle through the respective plane, the outer surface of the lateral support wall or the inner surface of the lateral support wall may be considered. When the annular seat support is arranged in the storage position, the outer surface of the lateral support wall is the surface adjacent to the inner surface of the lateral frame wall. The inner surface of the lateral support wall is the surface opposite to the outer surface of the lateral support wall.

[0053] In the case of the minimum tilt angle of the outer surface of the lateral frame wall through a plane perpendicular to the normal direction and the minimum angular difference of the inner surface of the lateral frame wall through the same plane, it is advantageous to consider the tilt angle of the inner surface, since said surface defines the boundary region of the storage volume.

[0054] It is further advantageous that the outer surface of the lateral support wall is configured to have an inclination angle with respect to a plane perpendicular to the normal direction of the seat base surface, while the inner surface of the lateral frame wall is configured to have an inclination angle with respect to the same plane, and the minimum angular difference from said plane to the outer surface of the lateral support wall deviates from the minimum angular difference from said plane to the inner surface of the lateral frame wall by at most + / - 20 degrees, in particular at most + / - 15 degrees, in particular at most + / - 10 degrees, in particular at most + / - 5 degrees, in particular at most + / - 1 degree.

[0055] In particular, the minimum angular difference is not equal to 90 degrees. This configuration can be described as a funnel in a funnel arrangement, as outlined in the exemplary shape of a hollow frustum pyramid shape of the annular seat support and the seat base frame. Due to the angular arrangement, the hollow frustum cone-shaped annular seat support is configured as a first funnel (especially a tighter funnel), and due to its angular configuration, the first funnel can be stored in a second funnel (especially a wider funnel) provided by the hollow frustum cone-shaped seat base frame. The minimum angular difference is relative and not an absolute angle because the annular seat support can be flipped 180° for storage into the storage volume.

[0056] It is particularly advantageous if the top edge of the frame defines a top frame region, and yet the bottom region of the seat support is smaller than the top frame region, and the bottom region of the seat support and the top frame region are configured such that in the stored state, the lateral support wall and the lateral frame wall contact each other in the circumferential direction around the normal central axis, especially yet the lateral support wall and the lateral frame wall are configured to extend parallel to each other. This allows for a highly compact arrangement because in the storage position of the annular seat support, the annular seat support contacts the seat base frame. This configuration provides an efficient use of the storage volume; no or only very little space in the storage volume is wasted and can be used for other items.

[0057] The described regions (i.e., the top frame region, the bottom frame region, the top region of the seat support, the bottom region of the seat support) are preferably configured as openings rather than solid surfaces.

[0058] Furthermore, it is advantageous that the shape of the cross-section of the top and bottom regions of the support is the same as the shape of the cross-section of the top and bottom regions of the frame. It is advantageous if they differ only in size, for example, in terms of the area measure in square meters or square centimeters. This enables two or four highly compact arrangements.

[0059] In a first exemplary configuration, the bottom frame region is smaller than the top frame region. This allows for a small footprint of the seat base in terms of the required standing area; however, this is disadvantageous in terms of the mechanical stability of the seat base. Generally, a small footprint of the seat base is also not important because the chair, table, floor, or other object on which the seat base is placed is usually large enough to accommodate the seat base.

[0060] In a second exemplary configuration of the seat base, the bottom frame region is larger than the top frame region. This allows for a stable positioning of the seat base, and it is difficult for the seat base to tip over when a child is located on the seat base surface.

[0061] In the installed state, the hollow frustum - like annular seat support may have two support configurations, which may preferably be combined with the second exemplary configuration of the seat base.

[0062] First, the cross - section of the hollow frustum - like annular seat support may increase as the distance from the seat base surface in the normal direction increases. This means that the top region of the seat support is larger than the bottom region of the seat support.

[0063] Second, the cross - section of the hollow frustum - like annular seat support may decrease as the distance from the seat base surface in the normal direction increases. This means that the top region of the seat support is smaller than the bottom region of the seat support.

[0064] In particular, if the minimum angular difference between the lateral support wall and the plane is equal to the minimum angular difference between the lateral frame wall and the plane, both configurations can be efficiently stored in the storage volume provided by the seat base frame. However, even if the minimum angular differences are not equal but different as described above, the requirement that the lateral support wall and the lateral frame wall contact each other in the circumferential direction in the storage state results in a highly compact arrangement, thus providing an available storage space defined by the seat support volume.

[0065] Both configurations of the annular seat support are possible because the annular seat support can be rotated 180 degrees relative to the seat base after uninstallation to be fully inserted into the frame volume. In the second configuration, the top region of the seat support is in the storage position adjacent to the top region of the frame. Here, no flipping of the annular seat support is required. In the first configuration, the bottom region of the seat support is in the storage position adjacent to the top region of the frame, that is, a 180 - degree flip of the annular seat support is required to fully insert the annular seat support into the storage volume provided by the seat base frame.

[0066] The following construction in combination with the second construction of the seat base is particularly advantageous. In the case where the cross-section of the hollow frustum-shaped annular seat support increases with the increase in the distance from the seat base surface in the normal direction in the installed state, the bottom region of the seat support is preferably smaller than the top region of the seat support. In addition, the bottom region of the support is preferably smaller than the top region of the frame. In addition, the bottom region of the support and the top region of the frame can preferably be configured such that in the storage position of the annular seat support, the lateral frame wall and the lateral support wall contact along the bottom edge of the annular seat support. In addition, the top region of the seat support can preferably be smaller than the bottom region of the frame. In addition, the top region of the seat support and the bottom region of the frame can preferably be configured such that the lateral frame wall and the lateral support wall contact along the top edge of the seat support. In addition, the minimum angular difference between the lateral support wall and the lateral frame wall and the plane is preferably equal. In the case where the annular seat support is not installed and stored in the volume provided by the seat base, this construction allows for a highly compact storage method. By flipping the annular seat support 180 degrees and fully inserting it into the storage volume provided by the seat base, the annular seat support can be stored in the space provided by the seat base. According to the described embodiment, the lateral support wall and the lateral frame wall are in full contact with each other circumferentially (i.e., in the angular region of 360° around the normal central axis).

[0067] By changing the shape of the annular seat support and the shape of the seat base frame, the contact configuration of the lateral support wall and the lateral frame wall can be selected, and the contact configuration only establishes several contact points between the lateral support wall and the lateral frame wall in the circumferential direction, still achieving a stable storage position of the annular seat support in the frame volume. In addition, the contact between the lateral support wall and the lateral frame wall in the circumferential direction is preferably fully arranged in a specific plane perpendicular to the normal central axis, but this is not necessary. There are a wide variety of constructions that allow the advantages of a flexible child seat system to be realized. In particular, the shapes of the seat base frame and the annular seat support can vary within a wide range while still being in the shape of a hollow frustum.

[0068] In particular, in the case where the minimum angular difference between the lateral support member wall and the plane is equal to the minimum angular difference between the lateral frame wall and the plane, the walls can contact along their entire extension in the normal direction. Alternatively, they can be arranged parallel to each other at a distance less than 1 cm, preferably less than 0.5 cm, however, the lateral frame wall and the lateral support member wall do not contact along their entire extension in the normal direction. When the annular seat support is in the storage position, this configuration maximizes the remaining storage volume for other items, such as for cushions, bottles, etc.; on the other hand, by contacting the lateral frame wall, the annular seat support can be fixed in the storage position along the circumference of the lateral support member wall. In the case where the lateral support member wall and the lateral frame wall contact each other along the entire length in the normal direction, their surfaces can be configured to be made of a material with sufficient hardness to avoid scratching in the corresponding walls in the storage position and when inserted into and removed from the storage position. In the normal direction, the annular seat support can be fixed by a tray.

[0069] This means that the annular seat support is widely fixed when stored in the frame volume and can hardly move or does not move in the frame volume. This is particularly advantageous in the case of transporting the child seat system from one place to another (e.g., from home to a restaurant and back).

[0070] In another embodiment, the annular seat support is removably mounted at the seat base by a fin - slit latching system. This fin - slit latching system is technically simple and provides a reliable connection between the seat base and the annular seat support. The fin - slit latching system includes at least one fin and at least one opening configured as a slit. At least one slit is configured to receive at least one fin.

[0071] The fin - slit latching system includes at least one latching element. Such a latching element is configured to fix or lock at least one fin to at least one slit, thereby providing a sufficiently reliable and secure connection between the seat base and the annular seat support in the installed state. This connection is sufficiently secure if the annular seat support and the seat base can only be removed consciously. The annular seat support that can be inserted into the slit provided by the seat base can include fins. However, the fins can also be provided by the seat base, and the annular seat support can include slits into which the fins can be inserted.

[0072] The latching element may include, for example, a bolt to lock the fin in the slit when the fin is inserted into the slit. In addition, such a latching element may include, for example, a snap element or a clamping element, which is fixed, for example, by an elastic restoring force. For example, the fin may have mechanical tension and / or may include a protruding portion that provides the possibility of reversibly locking the fin in a fixed position in the receiving slit. In addition, at least one multi-part fin may be used, the plurality of fin elements of which have slightly different orientations with respect to the slit opening, which may be used, for example, to fix the multi-part fin in the slit-shaped opening by warping. The slit-latching system allows the seat base and the ring-shaped seat support to be arranged and fixed in a defined position in an easy manner.

[0073] In particular, the seat base may include at least one slit-shaped opening that can be directed towards at least one fin included in the ring-shaped seat support and is configured to receive such a fin, however, the ring-shaped seat support and the seat base may be removably attached to each other by inserting, in particular latching, the at least one fin into the at least one slit-shaped opening. It has been shown that a plurality of fins and corresponding slits are advantageous for achieving a stable and defined arrangement of the ring-shaped seat support and the seat base relative to each other.

[0074] In the case of a plurality of fins, the individual fins may have individual different functions, such as a guiding function or a latching function. For example, a first group of fins including at least one fin may be configured as guiding fins, which facilitate the attachment of the ring-shaped seat support and the seat base. For example, a second group of fins including at least one fin may be configured as latching fins, which provide the locking of the ring-shaped seat support and the seat base in the installed state. In a particular embodiment, all the fins included in the plurality of fins may include latching elements. This provides a very stable connection between the ring-shaped seat support and the seat base; however, the flexibility is reduced because, in the case of removing the ring-shaped seat support from the seat base, a number of latching fins need to be unlocked.

[0075] In another embodiment, the seat base includes a front portion, a rear portion disposed opposite the front portion, and two side portions connecting the front side portion and the rear side portion. However, the seat base includes at least three slit-shaped openings. However, each of the two side portions includes at least one slit-shaped opening and the rear side portion includes at least one slit-shaped opening. However, the at least three slit-shaped openings are arranged on the seat base such that the fins of the ring-shaped seat support can be inserted by bringing the base of the ring-shaped seat support closer to the seat base along the normal direction. Approaching along the normal direction means that the ring-shaped seat support and the seat base approach each other in the normal direction relative to each other; preferably, the ring-shaped seat support is approached from the upper side of the seat base, which is arranged in the working position, i.e., in the direction opposite to the direction of the normal vector of the seat base surface. However, the seat base can also approach the ring-shaped seat support in the direction of the normal vector of the seat base surface to insert the fins into the slit-shaped openings.

[0076] This is advantageous because on the one hand, the number of fins can be kept relatively low. Three fins will be sufficient; on the other hand, a reliable connection between the ring-shaped seat support and the seat base can be provided. The front portion corresponds to the front side of the seat base, which is the direction in which the child's face faces when the child is located on the seat base.

[0077] In the case where the ring-shaped seat support includes three fins, the construction can be further improved. However, two of the three fins can be inserted into the slit-shaped openings of the side portions, especially one fin in each side portion, and are configured to guide the position of the ring-shaped seat support during installation. However, one fin (especially a multi-part fin) can be inserted into the slit-shaped opening of the rear portion. However, the slit-shaped opening of the rear portion and / or the fin to be inserted into the rear portion are configured to establish a latching connection between the ring-shaped seat support and the seat base. This is a safe and comfortable solution for fixing the ring-shaped seat support on the seat base. In addition, the ring-shaped seat support can be easily and quickly removed if needed.

[0078] In another embodiment, the tray includes a first fixing device and a second fixing device. However, the first fixing device is configured to removably mount the tray in the working position on the ring-shaped seat support. However, the first fixing device and the second fixing device are configured to fix the tray in the storage position. This means that the same fixing device (i.e., the first fixing device) is used to fix the tray in the working position at the ring-shaped seat support and to fix the tray in the storage position at the seat base. In addition to the first fixing device, a second fixing device is also used to fix the tray in the storage position.

[0079] In another embodiment, the first fixing device is arranged at a first edge of the tray and the second fixing device is arranged at a second edge of the tray, wherein the first edge and the second edge are arranged at opposite storage positions in a tray plane perpendicular to the normal central axis, wherein the second fixing device comprises a latch element, and wherein the seat base is configured to receive and fix the latch element. The tray plane is a plane perpendicular to the normal central axis when arranged in the storage position and includes the tray. The first fixing device is arranged on one side of the tray in the tray plane and the second fixing device is arranged on the opposite side of the tray in the tray plane. This enables the tray to be stably locked in the storage position when the fixing devices are spatially distributed. The second fixing device is further configured as a latch element that interacts with the seat base such that in the latched state, the tray is securely locked to the seat base. The seat base is configured such that it can receive the latch element and together with the latch element provides a locked state. In this locked state, the tray cannot be accidentally removed from the seat base (and accordingly from the storage position).

[0080] In another advantageous embodiment, the tray is shaped such that in the storage position, the tray together with the seat base frame forms a recess, in particular an open area where the storage volume is not restricted by the tray, wherein the dimensions of the recess are set such that the recess can be used as a carrying handle, and wherein the dimensions of the recess are further set such that the annular seat support cannot be removed from the storage volume without removing the tray from the storage position. The dimensions of the recess can be further set such that the annular seat support is held in the storage volume by the tray arranged in the storage position. The recess improves the portability of the child seat system since the child system can be easily carried if the tray is arranged in the storage position.

[0081] Referring to the above embodiments, it is further advantageous to use an annular seat support in the shape of a hollow frustum cone and such a recess configuration. The hollow frustum cone shape defines a seat support volume which is a sub-volume of the frame volume and can be used as a storage space for additional items. The recess can be configured such that the recess does not overlap with the support bottom region (correspondingly the support top region), regardless of whether the edge is adjacent to the tray in the storage position. This allows the support volume to be used as a storage volume without the risk of items falling out of the recess, which can be configured as an open area. In the case where the recess is not configured as an open area, such a risk does not arise.

[0082] In another embodiment, the annular seat support and / or the seat base form, in the installed state, an opening structure in the front side direction either separately or jointly, through which the legs of the child can be arranged in the front side direction. This allows for a convenient, comfortable, and safe seating experience. The opening structure can be provided by the annular seat support alone or can be established by a combination of the annular seat support and the seat base.

[0083] In another embodiment, in the installed state, the opening structure includes an opening that is configured to be divided into a first opening part and a second opening part by a removable mounting strap. However, in the installed state, the strap is arranged such that the first leg of the child can be guided through the first opening part and simultaneously the second leg of the child can be guided through the second opening part. In particular, the strap is arranged such that it symmetrically divides an opening. This structure is advantageous because it requires little material and is thus a lightweight construction. This improves the portability and mobility of the child seat system. Additionally, if not needed, the strap can be stored in the seat base. However, the strap is typically only required when the annular seat support is mounted at the seat base. In cases where the annular seat support is not needed, the strap can also be stored in the volume provided by the seat base. In such cases, a tray is typically not needed either, which means that the strap can be safely stored in the seat base together with the annular seat support, and the volume is closed by the tray arranged in the storage position.

[0084] Furthermore, the problem is solved by an annular seat support for a child seat system according to any one of the preceding claims, wherein the annular seat support is configured to surround a child placed on a seat base to which the annular seat support is removably mounted. The annular seat support includes at least one fin for mounting the annular seat support at the seat base such that the seat base is able to receive the at least one fin for removably attaching the annular seat support at the seat base. The annular seat support is configured to have a hollow frustum - like shape including lateral support walls, and the lateral support walls include a minimum inclination angle relative to a plane perpendicular to the normal direction, the minimum inclination angle deviating from the minimum inclination angle of the lateral frame walls included in the seat base frame relative to the plane by at most + / - 20 degrees. The dimensions of the annular seat support having the hollow frustum - like shape are set such that it can be fully inserted into the storage volume provided by the seat base. The annular seat support can include all or any combination of the components of the annular seat support described in connection with the child seat system.

[0085] Furthermore, the object is solved by a tray for a child seat system according to any one of claims 1 to 14, wherein the tray comprises a first fixing means and a second fixing means, wherein the first fixing means is configured to removably mount the tray in a working position on an annular seat support for the child seat system, wherein the first fixing means and the second fixing means are configured to fix the tray in a storage position on a seat base frame comprised in a seat base to which the annular seat support is mountable, wherein the tray is configured to at least partially limit a storage volume provided by the seat base when arranged in the storage position, wherein the first fixing means is arranged at a first edge of the tray and the second fixing means is arranged at a second edge of the tray, wherein the first edge and the second edge are arranged in opposite storage positions in a tray plane perpendicular to a normal direction of a seat base surface comprised in the seat base, and wherein the second fixing means comprises a latching element to fix the tray at the seat base frame. The tray may comprise all components or any combination of components of the tray described in connection with the child seat system.

[0086] In an advantageous embodiment, the tray is shaped such that, when arranged in the storage position, the tray together with the seat base frame forms a recess, in particular an open area where the volume is not limited by the tray, wherein the recess is dimensioned such that the recess can be used as a carrying handle and the recess is further dimensioned such that the annular seat support cannot be removed from the storage volume without removing the tray from the storage position.

[0087] Furthermore, the object is solved by a seat base for a child seat system according to any one of claims 1 to 14, the seat base comprising a seat base surface on which a child can be placed and a seat base frame supporting the seat base surface, however, the seat base frame being configured such that it provides an accessible storage volume defined by a boundary region of the seat base frame, however, the seat base frame comprising at least one slit-shaped opening configured to receive at least one fin included in the annular seat support for removably attaching the annular seat support and the seat base, however, the seat base frame being configured to have a hollow frustum-conical shape including lateral frame walls, however, the lateral frame walls including a minimum angle of inclination with respect to a plane perpendicular to the normal direction, the minimum angle of inclination deviating from the minimum angle of inclination of the lateral support walls included in the annular seat support by at most + / - 20 degrees, however, the dimensions of the hollow frustum-conical shaped seat base frame being set such that the annular seat support can be fully inserted into the storage volume. The seat base may include all or any combination of the components of the seat base described in connection with the child seat system. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] To more fully understand the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings. The present disclosure will be explained in more detail using exemplary embodiments specified in the schematic diagrams of the drawings, wherein:

[0089] Figure 1 A perspective view of an exemplary child seat system is shown, however, a tray is mounted on a seat support, and the seat support is mounted at a seat base.

[0090] Figure 2 Shows Figure 1 A perspective view of the exemplary child seat system in a disassembled state.

[0091] Figure 3 A perspective view showing a storage concept for an exemplary disassembled child seat system is shown.

[0092] Figure 4 A perspective view of the child seat system is shown, however, the seat support and the tray are arranged in a storage position.

[0093] Figure 5 A perspective view of a child seat system that can be used for toddlers is shown.

[0094] In the drawings, unless otherwise noted, like reference numerals represent like elements. DETAILED DESCRIPTION

[0095] Figure 1A perspective view of an exemplary child seat system 100 is shown. The child seat system 100 includes a seat base 200, a seat support 300, and a tray 400. The seat support 300 is configured as a ring and is removably mounted on the seat base 200 according to Figure 1 depending on the requirements of the child for whom the child seat system 100 is to be used, the seat base 200 can be used alone, or in combination with the ring-shaped seat support 300, or in combination with the ring-shaped seat support 300 and the tray 400.

[0096] The tray 400 is removably mounted at the ring-shaped seat support 300. Removably mounted means that the seat base 200, the ring-shaped seat support 300, and the tray can be connected to each other in a reliable manner and can be disassembled from each other in a controlled, especially easy and quick, manner.

[0097] The seat base 200 is made in one piece. This allows for easy use and easy disposal. The seat base 200 includes a seat base surface 201. The direction perpendicular to the seat base surface 201 is defined as the normal direction; the axis passing through the center of the seat base surface in the normal direction is the normal central axis N. A child, especially an infant, can be placed on the seat base surface 201. In the case where the ring-shaped seat support 300 is mounted on the seat base, a smaller toddler, for example, between 12 months and 18 months old, can also be placed.

[0098] The seat base surface 201 is supported by a seat base frame 202, thereby providing a mechanically stable foundation for the seat base surface 201. The seat base frame 202 includes lateral frame walls 204 that can transfer the gravity of the child to the support structure on which the seat base is located. Such a support structure is

[0099] not shown in and can be a table, a chair, a floor, etc. Figure 1 The seat base frame 202 defines a storage volume 203 through the seat base surface 201 and the lateral frame walls 204. The seat base frame 202 can be raised relative to the seat base surface 201 in the normal direction at the edge of the seat base surface 201. This raising of the edge portion of the seat base 200, correspondingly this raising of the edge portion of the seat base frame 202, allows for a more stable seating position of the child on the seat base surface 201. In addition, these raised portions of the seat base frame 202 can provide additional storage volume. When viewed in the forward direction F, the raised portions can preferably be arranged at the left portion and / or the right portion and / or the rear portion of the seat base frame 202.

[0100]

[0101] ​The seat base frame 202 is configured as a hollow structure. In the example shown, the seat base frame 202 is configured to have a hollow frustum-like conical shape, which is configured as a hollow frustum of a tetrahedron. In a plane perpendicular to the normal direction, the seat base frame 202 has a square-like cross-section, however, the corners of the square-like cross-section are configured as rounded.

[0102] The annular seat support 300 is considered annular because it provides a closed structure that circumferentially surrounds the normal central axis N. This allows a child to be placed in a safe manner as support is provided to the child within a 360-degree angular range around the normal central axis N. The annular seat support 300 is also made in one piece, thus providing easy disposal, low maintenance work, and mechanical stability.

[0103] The annular seat support 300 is also configured as a hollow structure. In the example shown, the annular seat support 300 is configured to include a hollow frustum-like conical shape, which is configured as a hollow frustum of a tetrahedron. In a plane perpendicular to the normal direction N, the annular seat support has a square-like cross-section, however, the corners are configured as rounded.

[0104] The annular seat support 300 includes a lateral support wall 301, which may have a variable extension in the normal direction along its circumference, i.e., around the normal central axis N of the seat support surface 201.

[0105] For example, compared to the extension in the normal direction of the lateral frame wall 204 at the side and rear portions, the extension in the normal direction of the lateral frame wall 204 on the front side F may be reduced. Moreover, compared to the extension in the normal direction of the lateral frame wall 204 at the side and rear portions, the extension in the normal direction of the lateral support wall 301 on the front side F may be reduced.

[0106] In this way, a leg opening structure O can be achieved, which allows the legs of a child to be positioned such that they face the forward direction F when the child is positioned. The leg opening structure is jointly created by the annular seat support 300 and the seat base 200. The tetrahedron shape of the annular seat support 300 is substantially provided by the lateral support wall 301.

[0107] According to Figure 1 , the belt 500 can be mounted on the annular seat support 300 and the seat base 200, in particular at the seat base belt fixing element 210 included in the seat base 200 and at the seat support belt fixing element 310 included in the annular seat support 300.

[0108] Preferably, the strap 500 includes an end unit that can be latched (including snapped or snapped) into the seat support strap securing element 310 and / or into the seat base strap securing element 210. In the installed state, the strap 500 divides the opening structure O into symmetrical opening sections. The two opening sections are configured so that one leg of a child can be positioned simultaneously in each section, guided through each of the two opening sections. This provides a stable sitting position for the child on the seat base surface 201 surrounded by the annular seat support 300.

[0109] Additionally, seat base straps (not shown) may be provided for securing the seat base to a support structure (e.g., a chair) on which it is positioned. To this end, the seat base frame 202 may include openings to receive such seat straps, thereby securely mounting the seat base 200 to the support structure. These openings are preferably located near the bottom region of the seat base frame 202. When the seat base is not in use or when the seat base 200 cannot be secured to a support structure by the seat straps, such as when the seat base is resting on the floor, the seat straps may be stored in the storage volume.

[0110] Figure 1 The annular seat support 300 is shown in an installed state, particularly in an operating position, in combination with a tray 400. The tray 400 is mounted by means of first fixing means 401. These first fixing means 401 interact with tray fixing elements 304 included in the annular seat support 300. In the exemplary embodiment shown, the tray fixing elements 304 are configured as receiving openings located on opposite side portions of the annular seat support 300, near the front side F.

[0111] The receiving opening 304 is configured to interact with the first fixing device 401 so that the tray 400 can be (particularly pivotably) fixed to the ring-shaped seat support 300. The first fixing device 401 is configured as two elastic rods arranged on the rear side of the tray 400 (i.e., on the side facing away from the front direction F). The two elastic rods each include an end unit that can be received by the receiving opening 304 to removably fix the tray 400 to the ring-shaped seat support 300.

[0112] The tray 400 is shown in its working position, i.e., a position in which the tray can be used by a child placed thereon for play, dining, or other activities. In the working position, the tray 400 is generally arranged perpendicular to the normal center axis N. The tray working surface 405 faces upward, i.e., is arranged perpendicular to the normal center axis N and is arranged distally relative to the seat base surface 201.

[0113] Figure 1Also shown is a second fixing device 402 included in the tray 400, which is configured to fix the tray 400 at Figure 4 the shown storage position. Since the tray 400 is arranged at the working position in Figure 1 it, the second fixing device 402 is not used.

[0114] The seat base 202 and the annular seat support 300 are of hollow structure. The seat base frame is configured to include a hollow frustum-like shape. Such a seat base frame 202 has a cross-section similar to a rectangle or a square in a plane perpendicular to the normal central axis N. The annular seat support 300 also includes a hollow frustum-like shape. Moreover, the annular seat support 300 is configured to have a cross-section similar to a rectangle or a square in a plane perpendicular to the normal central axis N.

[0115] Figure 2 Shown is the child seat system 100 according to Figure 1 in a disassembled state. The tray 400, the annular seat support 300, and the seat base 200 are shown separated from each other.

[0116] In addition to Figure 1 the elements already shown and explained in, in Figure 2 a guide fin 302 arranged at the left side portion of the annular seat support 300 and a latch fin 303 arranged at the rear side portion of the annular seat support 300 can be seen. Another guide fin is arranged on the right side portion of the annular seat support 300, however, it is not visible in the Figure 2 shown perspective view.

[0117] The latch fin 303 is configured as a multi-part fin, which allows the annular seat support to be removably fixed to the seat base 200 if the guide fin is properly arranged in its corresponding slit-shaped opening 209 included in the seat base frame 202. The latch fin 303 includes three parts (two edge parts and one central part), however, the edge parts and the central part are tensioned such that if the latch fin 303 is inserted into the corresponding slit-shaped opening 209, the latch fin is fixed in the slit-shaped opening 209 by the elastic force of the edge part and / or the central part of the latch fin 303.

[0118] As already pointed out, in order to fix the annular seat support 300 to the seat base 200 (correspondingly the seat base frame 202), the seat base frame 202 includes a corresponding number of slit-shaped openings 209 configured to receive the guide fins 302 or the latch fins 303. The slit-shaped openings 209 are formed by the top edge of the seat base frame 202, i.e., the frame top edge 205. The frame top edge 205 defines the frame top region 207 of the seat base frame 202. The guide fins 302 and the latch fins 303 are part of the seat support bottom edge 306 of the annular seat support. This is usually the edge oriented towards the seat base 200 shortly before attaching the annular seat support 300 to the seat base frame 202.

[0119] The annular seat support 300 further includes a seat support top edge 305, which is the edge at the distal side of the annular seat support 300 in the normal direction relative to the seat base surface 201. The seat support top edge 305 (correspondingly the seat support bottom edge) defines the seat support top region 307 (correspondingly the seat support bottom region 308) through its edge boundary. The seat base frame 202 further includes a frame bottom edge 206, which defines the frame bottom region through its edge boundary. The seat support top region 307 is configured to be smaller than the frame bottom region (see Figure 4 , reference numeral 208).

[0120] Figure 3 A perspective view of the child seat system 100 in a disassembled state is shown. In this view, the seat base 200 is turned upside down. In this orientation, the non-turned annular seat support 300 can be fully inserted into the storage volume 203 defined by the hollow structure of the seat base frame 202. In particular, the guide fins 302 and the latch fins 303 can be stored in the space provided by the raised side and rear portions of the seat base frame 202.

[0121] From Figure 3 's view, it is further visible that the seat support bottom region (see Figure 2 reference numeral 308 therein) is smaller than the frame top region 207 (also see Figure 2 ), which is oriented downwards in Figure 3 . In addition, it can be seen that the seat support top region 307 is smaller than the frame bottom region 208 (oriented upwards in Figure 3 ).

[0122] In addition, it can be seen that in Figure 3In the shown configuration, the inclination angle of the lateral frame wall 204 (especially the inclination angle of the inner surface of the lateral frame wall by a plane perpendicular to the normal direction) is substantially the same as the inclination angle of the lateral support wall 301 of the annular seat support 300 (especially the outer surface of the lateral support wall 301) by the plane.

[0123] The frame top region and the frame bottom region 208 are aligned with the seat support bottom region and the seat support top region 307 such that in the storage position, the lateral frame wall 204 circumferentially contacts the lateral support wall 301 around the normal central axis N, especially the support top edge 305.

[0124] This enables a very compact arrangement, thereby allowing an additional storage volume restricted by the lateral support wall 301 of the annular seat support 300 to be used as a boundary region. The additional support volume is not used by the annular seat support 300 and can be freely used for other items that should or need to be stored, such as at least one padding for the seat base, seat fixing straps, straps for separating the leg opening structure.

[0125] Figure 4 The child seat system 100 is shown in a disassembled state, yet the annular seat support 300 is fully inserted into the storage volume 203 provided by the seat base frame 202 and the seat base surface 201. That is, the annular seat support is arranged in the storage position. Additionally, the tray 400 is shown in its storage position and thus serves as a lid for the storage volume 203 by providing an additional boundary region that restricts the storage volume.

[0126] In the storage position, the tray 400 is mounted to the seat base frame 202 via a first fixing device 401 and a second fixing device 402, especially to the bottom part of the seat base frame 202. The first fixing device 401 including two elastic rods interacts with the tray fixing element 211 of the seat base frame 202. The first fixing device 401 is arranged at the first tray edge 403, and the second fixing device 402 is arranged on the second tray edge 402 opposite to the first tray edge 403. The working surface 405 of the tray 400 is oriented away from the storage volume 203, i.e., looking in a direction away from Figure 1 the normal direction N, and is arranged in a plane perpendicular to the normal direction N (i.e., the tray plane TP).

[0127] Each tray fixing element 211 receives one elastic rod included in the first tray fixing device 401. Additionally, the second fixing device 402 latches to the seat base frame 202. The first fixing device 401 and the second fixing device 402 together provide a fixed mounting of the tray 400 and accordingly lock the tray 400 at the bottom of the seat base frame 202.

[0128] The first tray edge 403 has a concave shape. When the tray 400 is arranged at the storage position at the seat base frame 202, this shape provides a recess R. The size of the recess R is set such that the recess R can be used as a carrying handle. In addition, the size of the recess R is further set such that the annular seat support 300 cannot be removed from the storage volume 203 without removing the tray 400 from the storage position. This increases the mobility and portability of the child seat system 100.

[0129] In addition, Figure 4 A plane P perpendicular to the normal central axis N is shown. An exemplary tilt angle IF of the seat base frame 202 through the plane P is shown here. When the seat base 200 and / or the annular seat support 300 can be flipped, the minimum tilt angle between the lateral frame wall 204 and the plane P (correspondingly the minimum tilt angle between the lateral support wall and the plane P) is relevant.

[0130] The shown minimum tilt angle IF for the outer surface of the lateral frame wall is shown here. However, this is particularly meaningful if the tilt angle IF of the outer surface of the lateral frame wall 204 through the plane P and the tilt angle of the inner surface of the lateral frame wall 204 through the plane P are substantially the same. The outer surface of the lateral frame wall 204 is the surface facing away from the storage volume 203, while the inner surface of the lateral frame wall 204 is the surface pointing towards the storage volume 203.

[0131] In the case where the tilt angles of the outer surface and the inner surface of the lateral frame wall 204 through the plane P are different, preferably the minimum tilt angle of the inner surface of the lateral frame wall 204 and the minimum tilt angle of the outer surface of the lateral support wall are considered. When the annular seat support 300 is arranged in the storage volume 203, the outer surface of the lateral support wall 204 is the surface adjacent to the inner surface of the lateral frame wall 204. Preferably, the minimum angle difference between the inner surface of the lateral frame wall 204 and the plane P is substantially the same as the minimum angle difference between the outer surface of the lateral support wall and the plane P.

[0132] Figure 5 The child seat system 100 in the so-called toddler mode is shown. The annular seat support and the tray are removed from the seat base 200 and arranged at the storage position in the storage volume provided by the seat base frame 202. Thus, an older child can be located on the seat base surface 201 supported by the seat base frame 202. The normal central axis N is arranged perpendicular to the seat base surface 201 and strikes the center of the seat base surface 201. The seat base frame 202 includes a lateral frame wall 204. In addition, Figure 5The frame top edge 205 that defines the frame top region 207 is shown. The frame top edge 205 includes three slit-shaped openings 209 that remain unused when only the seat base is used as a booster seat. Additionally, in Figure 5 the support bottom edge 206 and the seat base belt fixing element 210 are shown. Thus, the seat base 200 used alone can be used as a compact and stable booster seat for young children.

[0133] Although specific embodiments have been illustrated and described herein, those of ordinary skill in the art will understand that there are various alternative and / or equivalent specific implementations. It should be understood that one or more exemplary embodiments are merely examples and are not intended to limit the scope, application, or construction in any way. Instead, the foregoing summary and detailed description will provide those skilled in the art with a convenient roadmap for implementing at least one exemplary embodiment. It should be understood that various changes can be made to the functions and arrangements of the elements described in the exemplary embodiments without departing from the scope set forth in the appended claims and their legal equivalents. Generally, this application is intended to cover any modifications or variations of the specific embodiments discussed herein.

[0134] List of Reference Numerals

[0135] 100 Child seat system

[0136] 200 Seat base

[0137] 201 Seat base surface

[0138] 202 Seat base frame

[0139] 203 Storage volume

[0140] 204 Lateral frame wall

[0141] 205 Frame top edge

[0142] 206 Frame bottom edge

[0143] 207 Frame top region

[0144] 208 Frame bottom region

[0145] 209 Opening, slit-shaped

[0146] 210 Seat base belt fixing element

[0147] 211 Tray fixing element of seat base

[0148] 300 Seat support, annular

[0149] 301 Lateral support wall

[0150] 302 Guide fin

[0151] 303 Latch fin

[0152] 304 Tray fixing element of seat support: Receiving opening

[0153] 305 Top edge of seat support

[0154] 306 Bottom edge of seat support

[0155] 307 Top region of seat support

[0156] 308 Bottom region of seat support

[0157] 310 Seat support belt fixing element

[0158] 400 Tray

[0159] 401 First fixing device: Latching rod

[0160] 402 Second fixing device: Latch element

[0161] 403 First tray edge

[0162] 404 Second tray edge

[0163] 405 Tray working surface

[0164] 500 Belt

[0165] IF Tilt angle frame

[0166] P Plane perpendicular to the normal central axis

[0167] TP Tray plane

[0168] R Depression

[0169] N Normal central axis

[0170] O Leg opening structure

[0171] F Forward direction

Claims

1. A child seat system (100) for placing a child, the child being an infant or a toddler, the child seat system (100) comprising: - A seat base (200), the seat base comprising a seat base surface (201) on which the child can be placed and a seat base frame (202) supporting the seat base surface (201), and the seat base frame (202) being configured such that it provides an accessible storage volume (203) restricted by a boundary region of the seat base frame (202), - A ring-shaped seat support (300), the ring-shaped seat support being removably mounted at the seat base (200), and the ring-shaped seat support (300) being configured such that in the installed state, the child placed on the seat base surface (201) is circumferentially surrounded by the ring-shaped seat support (300) about a normal central axis (N) of the seat base surface (201), especially in a plane perpendicular to the normal central axis (N) of the seat base surface (201), and the ring-shaped seat support (300) being further configured such that it can be fully inserted into the provided storage volume (203), - A tray (400), the tray being removably mounted to the ring-shaped seat support (300) for operation in a working position and removably mounted to the seat base (200) for operation in a storage position, and in the storage position, the tray (400) restricts the storage volume (203) to an additional boundary region.

2. The child seat system according to claim 1, wherein the seat base (200) is configured as a one-piece unit, and the storage volume (203) is defined by the seat base surface (201) and the boundary region of the seat base frame (202).

3. The child seat system according to claim 1 or 2, wherein the ring-shaped seat support (300) is configured as a one-piece unit.

4. The child seat system according to any one of the preceding claims, wherein the annular seat support (300) is configured to have a hollow frustum - like shape including lateral support walls (301), and the annular seat support (300) of the hollow frustum - like shape includes a seat support top edge (305) and a seat support bottom edge (306) in the normal direction (N) of the seat base surface (201) in the installed state, and the seat support volume is defined by the space arranged between the seat support top edge (305) and the seat support bottom edge (306), and the seat base frame (202) is configured to have a hollow frustum - like shape including lateral frame walls (204), and the seat base frame (202) of the hollow frustum - like shape includes a frame top edge (205) and a frame bottom edge (206) in the normal direction (N), and the frame volume is defined by the space arranged between the frame top edge (205) and the frame bottom edge (206), and the frame volume is larger than the seat support volume.

5. The child seat system according to claim 4, wherein the lateral support walls (301) are configured to have an inclination angle with respect to a plane (P) perpendicular to the normal central axis (N) of the seat base surface (201), and the lateral frame walls (204) are configured to have an inclination angle (IF) with respect to the same plane (P), and the minimum angular difference from the plane to the lateral support walls (301) deviates from the minimum angular difference from the plane (P) to the lateral frame walls (204) by at most + / - 20 degrees, preferably at most + / - 15 degrees, preferably at most + / - 10 degrees, preferably at most + / - 5 degrees.

6. The child seat system according to claim 5, wherein the seat support bottom edge (306) defines a seat support bottom region (308), and the frame top edge (206) defines a frame top region (207), and the seat support bottom region (308) is smaller than the frame top region (207), and the seat support bottom region (308) and the frame top region (207) are configured such that in the storage state, the lateral support walls (301) and the lateral frame walls (204) are in contact with each other in the circumferential direction around the normal central axis (N), in particular, the lateral support walls (301) and the lateral frame walls (204) are configured to extend parallel to each other.

7. The child seat system according to any one of the preceding claims, wherein the annular seat support (300) is removably mounted at the seat base by a fin - slot latching system (209, 302, 303).

8. The child seat system according to claim 7, Wherein the seat base (200) includes at least one fin (302, 303) included in the annular seat support (300) and is configured with at least one slit-shaped opening (209) for receiving such fins (302, 303), and the annular seat support (300) and the seat base (200) can be removably attached to each other by inserting the at least one fin (302, 303), in particular by latching the at least one fin (303) into the at least one slit-shaped opening (209).

9. The child seat system according to claim 7 or 8, Wherein the seat base (200) includes a front portion, a rear portion disposed opposite to the front portion, and two side portions connecting the front side portion and the rear side portion, and the seat base (200) includes at least three slit-shaped openings (209), and each of the two side portions includes at least one slit-shaped opening (209) and the rear side portion includes at least one slit-shaped opening (209), and the at least three slit-shaped openings (209) are arranged on the seat base (200) such that the fins (302, 303) of the annular seat support (300) can be inserted by bringing the annular seat support (300) closer to the seat base (200) along the normal direction (N).

10. The child seat system according to any one of the preceding claims, Wherein the tray (400) includes a first fixing device (401) and a second fixing device (402), and the first fixing device (401) is configured to removably mount the tray (400) in the working position on the annular seat support (300), and the first fixing device (401) and the second fixing device (402) are configured to fix the tray (400) in the storage position.

11. The child seat system according to claim 10, Wherein the first fixing device (401) is arranged at a first edge (403) of the tray (400) and the second fixing device (402) is arranged at a second edge (404) of the tray (400), and the first edge (403) and the second edge (404) are arranged opposite to each other in a tray plane (TP) perpendicular to the normal central axis (N), and the second fixing device (404) includes a latching element (402), and the seat base (200) is configured to receive and fix the latching element (402).

12. The child seat system according to any one of the preceding claims, Wherein the tray (400) is shaped such that in the storage position, the tray (400) and the seat base frame (202) together form a recess (R), in particular an open area (R) where the storage volume (203) is not restricted by the tray (400), and the dimensions of the recess (R) are set such that the recess (R) can be used as a carrying handle, and the dimensions of the recess (R) are further set such that the annular seat support (300) cannot be removed from the storage volume (203) without removing the tray (400) from the storage position.

13. The child seat system according to any one of the preceding claims, wherein in the installed state, the annular seat support (300) and / or the seat base (200) independently or jointly form an opening structure (O) in the front side direction (F) of the seat base (200), through which a child's legs can be arranged in the front side direction (F).

14. The child seat system according to claim 13, wherein in the installed state, the opening structure (O) includes an opening, which is configured to be divided into a first opening part and a second opening part by a removable mounting strap (500), and in the installed state, the strap (500) is arranged such that the first leg of the child can be guided through the first opening part and at the same time the second leg of the child can be guided through the second opening part, in particular the strap (500) can be arranged such that it symmetrically divides the opening in the installed state.

15. An annular seat support (303) for a child seat system (100) according to any one of the preceding claims, wherein the annular seat support (300) is configured to surround a child placed on a seat base (200) to which the annular seat support (300) is removably mounted, and the annular seat support (300) includes at least one fin (302, 303) for mounting the annular seat support (300) at the seat base (200), such that the seat base (200) can receive the at least one fin (302, 303) for removably attaching the annular seat support at the seat base, and the annular seat support (300) is configured to have a hollow frustum - like shape including a lateral support wall (301), and the lateral support wall (301) includes a minimum inclination angle with respect to a plane (P) perpendicular to the normal direction, the minimum inclination angle deviating from the minimum inclination angle of the lateral frame wall included in the seat base frame (202) with respect to the plane (P) by at most + / - 20 degrees, and the dimensions of the annular seat support (300) having the hollow frustum - like shape are set such that it can be fully inserted into the storage volume (203) provided by the seat base (200).

16. A tray (400) for a child seat system (100) according to any one of claims 1 to 14, wherein the tray (400) comprises a first fixing means (401) and a second fixing means (402), wherein the first fixing means (401) is configured to removably mount the tray (400) in a working position on an annular seat support (300) for the child seat system (100), wherein the first fixing means and the second fixing means (401, 402) are configured to fix the tray (400) in a storage position on a seat base frame (202) comprised in a seat base (200) to which the annular seat support (300) is mountable, wherein the tray is configured to at least partially limit a storage volume (203) provided by the seat base (200) when arranged in the storage position, wherein the first fixing means (401) is arranged at a first edge (403) of the tray (400) and the second fixing means (402) is arranged at a second edge (404) of the tray (400), wherein the first edge and the second edge (403, 404) are arranged in opposite storage positions in a tray plane perpendicular to a normal direction (N) of a seat base surface (201) comprised in the seat base (200), wherein the second fixing means (402) comprises a latch element to fix the tray at the seat base frame (202). A seat base (200) for a child seat system (100) according to any one of claims 1 to 14, comprising a seat base surface (201) on which a child can be placed and a seat base frame (202) supporting the seat base surface (201), wherein the seat base frame (202) is configured such that it provides an accessible storage volume (203) defined by a boundary region of the seat base frame (202), wherein the seat base frame (202) comprises at least one slit-shaped opening (209) configured to receive at least one fin (302, 303) comprised in the annular seat support for removably attaching the annular seat support (300) and the seat base (200), wherein the seat base frame (200) is configured to have a hollow frustum-like shape comprising lateral frame walls (204), wherein the lateral frame walls (204) comprise a minimum angle of inclination relative to a plane (P) perpendicular to the normal direction, the minimum angle of inclination deviating from a minimum angle of inclination of a lateral support wall (301) comprised in the annular seat support (300) by at most + / - 20 degrees, and wherein the dimensions of the hollow frustum-like seat base frame (202) are set such that the annular seat support (300) can be fully inserted into the storage volume (203).

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