WO2025093405A1 - Child seat, and child seat base - Google Patents

Abstract

A child seat base (10), for attaching on a vehicle seat, comprising: a pedestal element (11) and a rotary element (12) which is arranged rotatably on the pedestal element (11), a locking means (32) for releasably locking an orientation of the rotary element (12) relative to the pedestal element (11), wherein the locking means can assume a locking position for fixing a selected orientation or an unlocking position for releasing the rotation, a fastening means (13), assigned to the rotary element (12), for fastening a seat element on the rotary element (12), wherein the fastening means (13) can assume an unlocking position and a locking position, and a first actuating means (17) for actuating both the locking means and the fastening means (13), and a second actuating means (18) for actuating the locking means but not the fastening means (13), or for actuating the fastening means (13) but not the locking means.

Description

Child seat and child seat base

Description

The invention relates to a child seat and a child seat base, wherein the child seat base has a base element and a rotating element rotatably arranged on the base element.

EP 3 798 049 A1 discloses a child seat with an actuating element and a function selection element. In a first position of the function selection element, the actuating element can only release the rotation of a turntable, and in a second position, only the locking mechanism between the child seat and the base.

The operation of the child seat base according to the state of the art is considered to be in need of improvement.

The object of the invention is to achieve the most user-friendly operation possible for a child seat base, particularly with the least possible design effort. Preferably, the operation of fixing or releasing the rotation of a seat element relative to the child seat base and/or locking the seat element relative to the child seat base should be simplified.

This object is achieved in particular by the features of claim 1.

In particular, the object is achieved by a child seat base for attachment to a vehicle seat (motor vehicle seat), comprising: a base element and a rotary element arranged on the base element so as to be rotatable (in particular about an at least substantially vertical axis), a locking device for releasably locking an orientation (rotational position) of the rotary element relative to the base element, wherein the locking device can assume a locking position for fixing a (selected) orientation or an unlocking position for releasing the rotation (or an orientation to enable a change in orientation), and a fastening device assigned to the rotary element for fastening a seat element on the rotary element, wherein the fastening device can assume an unlocking position and a locking position.

According to a first (particularly preferred) aspect, the child seat base comprises a first actuating device (actuating element) for actuating both the locking device and the fastening device and a second actuating device (actuating element) for actuating the locking device but not the fastening device, or for actuating the fastening device but not the locking device.

According to the first aspect, in particular, one (or the first) actuating device is provided which enables the actuation of two devices (namely the locking device and the fastening device) and a further (second) actuating device with which only one of the two devices can be actuated (which should not exclude - but can exclude - the possibility that a third device can be actuated by the further actuating device).

The first aspect simplifies operation and, in particular, increases safety. For example, the user can choose whether to operate both of the above-mentioned devices (locking device and fastening device) in one operation, or only one of the two. If, for example, the second actuating device only interacts (or can interact) with the fastening device, this makes it easy to operate only this fastening device without also affecting the locking device. For example, This allows a relatively frequent operation (such as removing a seat element) to be performed independently of a change in orientation, which can also increase safety by reducing the risk of unintentional changes to the entire system. Overall, this simplifies usability and increases safety with simple means.

According to a second (particularly preferred) aspect of the invention, which can in particular be combined with the first aspect, the child seat base (in particular the locking device and/or the fastening device) is configured such that (at least in a first configuration of the child seat base) transferring the locking device into the unlocking position causes the fastening device to be unlocked and/or (conversely) that transferring the fastening device into the unlocking position causes the locking device to be unlocked. In particular, the locking device is operatively connected to the fastening device (or vice versa), preferably in such a way that a movement of the locking device causes (or at least contributes to) a movement of the fastening device, or vice versa. This simplifies the operation of the child seat base in a structurally simple manner.

According to a third (particularly preferred) aspect, which can be combined in particular with the first and/or second aspect, the child seat base comprises a selection device. According to a first sub-aspect of the third aspect, the selection device is preferably designed to select one of at least one first and at least one second configuration (of the child seat base), wherein the first configuration differs from the second configuration both with regard to the operability of the fastening device (and/or locking device) and with regard to the extent of rotatability of the rotary element relative to the base element. Alternatively or additionally - according to a second preferred sub-aspect of the third aspect - the selection device is designed to select one of at least one first, at least one second and at least one third configuration, wherein each of the three (namely the first, second and third) configurations differs with regard to the operability of the fastening device (and/or locking device) and/or with regard to the extent of The rotatability of the rotating element relative to the base element distinguishes it from the other configurations. Such a selection device makes it easy for the user to (individually) configure the child seat base so that certain changes are either possible or not (with regard to the fastening device and the locking device), or are possible to varying degrees (with regard to the fastening device and the locking device). This, in turn, simplifies operation and reduces the risk of incorrect operation.

The first and/or second actuating device (and/or any actuating devices mentioned below, e.g. the common actuating device) is/are preferably rigid and/or integral, possibly monolithic.

The first and/or second actuating devices can be structurally and/or functionally separated from one another. Structural separation means, in particular, that the first and second actuating devices are spaced apart from one another (and/or can each be moved independently of the other actuating device), preferably at a distance of at least 1 cm or at least 5 cm from one another. Functional separation means, in particular, that the respective actuation can be carried out independently of the other actuation (independent actuation would therefore not exist, in particular, if both actuating devices had to be actuated in order to perform a specific process (or a specific actuation)).

Actuation of the fastening device is understood, in particular, to mean that the fastening device can be actuated or not actuated by at least one actuating device that is fundamentally suitable or intended for actuating the fastening device in a (specific) configuration. In a configuration in which actuation by the corresponding actuating device is not possible, actuation by (any) further actuating device may certainly be possible (although this may also be excluded). The rotatability of the rotating element particularly concerns the question of whether the rotating element is rotatable at all, as well as the question of the extent of such rotatability (i.e., in particular, the maximum possible angle of rotation). When reference is made to an extent of rotatability, this particularly means that a certain degree of rotatability is present (i.e., rotation is not completely blocked). A small extent of rotatability means, in particular, a small maximum possible angle of rotation. A large extent of rotatability means, in particular, a large (maximum) possible angle of rotation.

According to a fourth (particularly preferred) aspect of the invention, which can preferably be combined with a first and/or second and/or third aspect, a first (the above first) actuating device is provided for the (joint) actuation of both the locking device and the fastening device - in at least a first configuration of the child seat base - (as a component of the child seat base). Joint actuation is to be understood in particular as meaning that the (first) actuating device can be moved (in particular in one go) (in particular without having to move another device or actuating device, wherein such another device or actuating device may not even be present) such that both devices (i.e., the locking device and the fastening device) are actuated accordingly (in particular with an overlap in time, preferably simultaneously). Such a (joint) actuating device can facilitate operation in a structurally simple manner. The actuating device is preferably formed from or comprises a movable part. The movable part preferably does not have a (co-movable) function selection device and/or preferably does not have a subsection that is movable relative to another subsection of the movable part.

In at least one second configuration (in particular the above second configuration) of the child seat base, a transfer of the locking device into its unlocking position is not accompanied by a transfer of the fastening device into its unlocking position and/or, conversely, a transfer of the fastening device into its unlocking position is not accompanied by a transfer of the locking device into its unlocking position. Alternatively or additionally, actuation of the first actuating device causes the locking device to be moved into its unlocking position, but not the fastening device to be moved into its unlocking position. Alternatively or additionally, actuation of the first actuating device causes the fastening device to be moved into its unlocking position, but not the locking device to be moved into its unlocking position.

Preferably, a first (the first) actuating device is provided (as a component of the child seat base), in particular to transfer the locking device from the locking position into the unlocking position, wherein actuation of the first actuating device, in particular in a first configuration (the first configuration) of the child seat base, results in transfer of the locking device and the fastening device into the unlocking position.

In one embodiment, the child seat base comprises a first actuating device, preferably for transferring the locking device from the locking position to the unlocking position and/or for transferring the fastening device from the locking position to the unlocking position. Preferably, the first actuating device is configured such that actuation of the first actuating device, in particular in (at least) a first configuration of the child seat base, results in transferring the locking device and the fastening device to the unlocking position.

The child seat base may comprise a transmission device for transmitting the unlocking of the locking device to the fastening device and/or (conversely) for transmitting the unlocking of the fastening device to the locking device.

The child seat base may include a selection device (selection element) configured to assume at least a first and a second position and (optionally) a third position. The child seat base may be in a first configuration in the first position of the selection device. Alternatively or additionally, the child seat base may be in a second configuration in the second position of the selection device. Optionally, the child seat base can be located in a third configuration in a third position (of the selection device). The selection device mentioned here (and/or above) can preferably be formed in one piece and/or be designed such that it forms a coherent component (i.e., for example, it does not consist of two different operating devices/operating elements that are spatially separated from one another).

Additionally or alternatively, the conversion of the child seat base from the first configuration to the second and/or third configuration and/or vice versa can be carried out (automatically) by attaching or securing a (first and/or second) seat element. Thus, attaching (or securing) a first seat element (e.g., an infant carrier) can result in the first configuration of the child seat base being set, and attaching (or securing) a second seat element (e.g., a Group I, II, and/or III seat element, whereby, for example, "Group I" should not exclude the possibility that the child seat can also be configured or used for at least one other group, e.g., Group 0 and/or 0+), can result in a second and/or third configuration, preferably a third configuration, of the child seat base being set. In particular, the first and/or second seat element may comprise a corresponding structure on the underside which can move the selection device from the first position to the second and/or third position (e.g., push) and/or vice versa.

Preferably, a rotation of the rotary element relative to the base element in the first and/or second position of the selection device (or in the first and/or second configuration of the child seat base) by at least 10°, preferably at least 30°, more preferably at least 80°, even more preferably at least 250°, optionally at least 175° and/or at most 350°, preferably at most 280°, more preferably at most 185° is enabled. Alternatively or additionally, a rotation of the rotary element relative to the base element in the third position of the selection device or in the third configuration by at least 360° can be enabled, in particular be angularly unlimited.

In general, any position of the selection body (the

selection element) correspond to a configuration of the child seat base in which At least one (selected) function of the child seat base is either enabled, enabled to a limited extent, or not enabled. For example, the rotation of the rotating element may be enabled only over a limited angular range or unlimitedly, and/or the transmission of an unlocking of the locking device to the fastening device and/or (conversely) the transmission of an unlocking of the fastening device to the locking device may be enabled or not enabled.

The child seat base can preferably assume at least two of the following (first, second and/or third) configurations.

In a first configuration (or first position of the selection device), rotation of the rotary element can be enabled to a limited extent, preferably over an angular range of at least 10°, preferably at least 90°, more preferably at least 175°, for example 180° and/or at most 350°, preferably at most 280°, even more preferably at most 185°. Alternatively or (preferably) additionally, in the first configuration, transmission of the unlocking of the locking device to the fastening device and/or transmission of the unlocking of the fastening device to the locking device can be enabled.

In a second configuration (or second position of the selection device), rotation of the rotary element can be enabled to a limited extent, preferably over an angular range of at least 10°, preferably at least 90°, more preferably at least 175°, for example 180° and/or at most 350°, preferably at most 280°, even more preferably at most 185°. Alternatively or (preferably) additionally, transmission of the locking device to the fastening device and/or transmission of the fastening device to the locking device can be disabled (or blocked) in the second configuration.

In the third configuration (or third position of the selection device), rotation of the rotary element over an angular range of 360° or more can be enabled. Alternatively or (preferably) additionally, in the third configuration, transmission of the unlocking of the locking device to the fastening device and/or transmission of the Fastening device on the locking device must not be released (or blocked).

The child seat base may comprise an (additional) second (the above second) actuating device for transferring the fastening device and/or locking device from the locking position to the unlocking position, wherein, optionally, actuation of the second actuating device in any configuration of the child seat base results in unlocking of the fastening device and/or locking device.

When reference is made to a rotation, in particular a change in orientation, this should in particular mean that the child seat base or the corresponding elements involved are configured in such a way that the rotation can take place without a (complete) separation of the elements involved, i.e. in particular in such a way that the elements involved remain fundamentally connected to one another or are not spaced apart from one another, and if necessary also remain fixed to one another (at least without any further actuation or adjustment process).

The rotating element can (in at least one configuration of the child seat base) assume at least one of the following (stable or, depending on the configuration, unstable) orientations relative to the base element: at least one (stable) transport orientation, preferably an orientation in the direction of travel (forward facing) and/or an orientation against the direction of travel (rearward facing); and at least one stable and/or unstable entry orientation, preferably one in which the seat element is directed to the side, in particular a stable and/or unstable entry orientation in which the seat element is directed to the left and/or a stable and/or unstable entry orientation in which the seat element is directed to the right, in particular towards a door of the vehicle.

The rotary and/or base element may comprise at least one alignment support structure corresponding to at least one orientation (transport and/or entry orientation) in order to lock the orientation in connection with the locking device (e.g. comprising a recess, for example a groove and/or a projection, in particular a recess Pair of projections, one of the recess and projection being arranged on one element of the rotary and/or base element, and the other of the recess and projection being arranged on the other element).

The rotary and/or base element may comprise at least two alignment support structures, more preferably at least or exactly four alignment support structures, in particular at a uniform distance along a circumference of the rotary element (preferably at a distance of 90°).

An alignment retention structure is understood, in particular, to be a structure that can fix or maintain a specific alignment. The (respective) alignment retention structure may therefore possibly have multiple substructures (e.g., multiple recesses and/or projections).

In one embodiment, the rotary and/or base element may comprise two transport orientations and two corresponding orientation support structures, preferably at an angular distance of (at least approximately) 180° and/or two entry orientations and/or two corresponding orientation support structures, preferably at an angular distance of (at least approximately) 180°, more preferably (at least approximately) 90° offset from the transport orientations.

A stable alignment is understood to mean, in particular, an alignment in which the rotating element cannot be rotated out of this alignment by external force (non-destructively), wherein, for example, in such a case, the alignment holding structure can be shaped such that the locking device (or a locking element of the locking device) can only be released from the alignment holding structure when one (the first) actuating device is actuated.

An unstable orientation is understood to mean, in particular, an orientation in which the rotating element can be rotated out of this orientation by an external force, for example if the external force exceeds a certain value (which can also be zero or greater than zero (particularly in the case of a soft lock)). For example, the alignment holding structure can be shaped such that it has at least one A run-on bevel is included so that the locking device (or the locking element of the locking device) can be pushed out of the alignment holding structure by further rotating the rotating element over the run-on bevel.

The rotary and/or base element may comprise a (particularly arcuate) rotation-limiting structure (rotation-limiting structure), for example a recess, in particular a groove, and/or a guide structure into which a rotation-limiting element can engage in order to limit the rotation of the rotary element relative to the base element, preferably depending on the position of the selection device (the selection element).

In one embodiment, the rotary element may comprise the rotation limiting structure, wherein the rotation limiting element may (directly) engage the rotation limiting structure of the rotary element.

In one embodiment, the base element may comprise the rotation-limiting structure and the rotary element may comprise a recess and/or opening, wherein the rotation-limiting element may engage into the rotation-limiting structure of the base element through the recess or the opening of the rotary element.

The rotation limiting structure can limit rotation of the rotary element to a maximum angular range of 270° at most.

Preferably, the rotation-limiting structure can enable a maximum angular range of at least 10° and/or at most 350°, preferably at most 275°. For example, the rotating element can be rotated (and optionally locked) in a transport orientation, preferably a transport orientation opposite the direction of travel, and/or in at least two entry orientations within the enabled angular range.

The locking device may comprise or be formed from a locking element which can engage in (at least) one (in particular a respective one above) alignment holding structure, wherein the locking element in the locking position is within the Alignment support structure and/or in the unlocked position outside the (respective) alignment support structure.

The locking device (in particular the locking element) can be arranged on the rotating and/or the base element (or, in the case of relative rotation between the aforementioned elements, can be a co-moving component of the respective element). Preferably, the locking device is arranged on the base element.

The locking device (in particular its locking element) can be arranged so as to be translationally and/or rotationally movable on and/or within the rotating and/or base element.

The locking device (in particular the locking element) can be prestressed in the direction of the (respective) alignment holding structure by an elastic element, for example a spring, in particular a torsion, tension and/or compression spring.

In one embodiment, the locking device (the locking element) can be arranged in a front region of the base element and/or possibly prestressed in the direction of the vertical axis of rotation of the rotary element.

The child seat base may comprise a (first) actuating device for moving the locking device from the locking position to the unlocking position upon actuation of the actuating device.

The first actuating device can be arranged on the rotating and/or base element. Preferably, the actuating device is arranged in a front region of the base element and/or the child seat base (in general).

If a structure, for example a device or an element, is to be arranged in a specific area of a (superordinate) structure, for example in a front or side area, this shall in particular mean that the corresponding subordinate structure is partly or completely within one half, preferably within one third of the corresponding entire superordinate structure, so that, for example, an arrangement in a front area means that the subordinate structure is arranged partly or entirely in the front half, in particular in the front third.

The first actuating device can comprise at least one actuating element, preferably two actuating elements, wherein a first actuating element can be arranged in a first (preferably front, lateral) region of the base and/or rotary element, and a second actuating element can be arranged in a second (in particular opposite the first region, preferably front, lateral region of the base and/or rotary element).

In general, a (respective, in particular the first) actuating device can comprise at least or exactly one, preferably at least or exactly two actuating elements, preferably (each) in a front and/or lateral region of the base and/or rotary element.

If (at least) two actuating elements of the first actuating device are provided, these are preferably (selectively) actuatable in the sense that the actuation of only one of the actuating elements is sufficient to operate the actuating device (which does not necessarily exclude the possibility that both actuating elements can also be actuated simultaneously, which may actually be the case).

An actuating device is preferably understood to mean a manual actuating device. An actuating element is preferably understood to mean a manual actuating element (in the sense that the actuating element is actuated directly or indirectly by hand, in particular by appropriate contact, in particular in a pulling and/or pushing and/or rotating manner).

The (respective, in particular first and/or second) actuating device and/or the (respective) actuating element can be actuated in a pulling and/or pushing and/or rotating manner, for example by being designed by a pulling device, a slide and/or a lever or comprising such. The actuating device (or its actuating element(s) can be (operatively) connected to the locking device (the locking element) in such a way that an actuation of the actuating element(s) can drive the locking device (the locking element) in such a way that it can be moved, in particular rotated and/or pulled and/or pushed, out of a respective alignment support structure (in order to unlock the locking device and thus (in particular) to enable rotation of the rotary element with respect to the base element).

According to the embodiment, the respective (in particular the first) actuating device (or its actuating element(s)) can be connected to the locking device (in particular locking element) via at least one Bowden cable (generally: pull and/or push transmission device).

According to the embodiment, the respective (in particular the first) actuating device (or its actuating element(s)) can comprise a run-up bevel and/or a guide slot which moves the locking device (the locking element) out of the alignment holding structure upon actuation of the actuating device.

The rotary and/or base element may have a (first) indicator device, which is preferably (operatively) connected to the actuating and/or locking device in order to indicate a locking and/or unlocking position of the locking device.

The indicator device can emit an acoustic and/or optical signal corresponding to a locking and/or unlocking position of the locking device.

Additionally or alternatively, the indicator device can emit an acoustic and/or optical signal corresponding to the presence and/or absence of locking of a transport orientation.

In one embodiment, the indicator device can emit a first acoustic and/or optical signal when the locking device is in a locking position (i.e. the locking device or the locking element is engaged with a corresponding alignment retaining structure of a transport and/or entry orientation) and emit a second acoustic and/or optical signal when the locking device (the locking element) is in an unlocking position.

In one embodiment, the indicator device can output a first (acoustic and/or optical) signal when the locking device is in a locking position in a transport orientation of the rotary element and output a second (acoustic and/or optical) signal when the locking device is in an unlocking position and/or the rotary element is in an entry orientation, possibly independently of the fact that the locking device is actually in the locking position in the entry orientation of the rotary element.

The fastening device can comprise at least or exactly one fastening element, preferably at least or exactly two fastening elements, more preferably at least or exactly four fastening elements (to releasably connect a/the seat element to the rotating element). The (respective) fastening element preferably comprises a hook or is formed from one.

The fastening device (in particular the at least one fastening element) can be arranged rotatably and/or translationally on the rotary element.

The fastening device (in particular the at least one fastening element) can be designed as a hook which is rotatably arranged on the rotating element and which can preferably engage around (and/or engage with) a rod or other structure arranged on the underside of the seat element.

Additionally or alternatively, at least one fastening element can be designed as a translationally displaceable latch and/or bolt, which fits into a corresponding recess provided for this purpose in the seat element (in particular from a multitude of recesses) in the locking position.

The at least one fastening element can be preloaded into the locking or unlocking position by at least one elastic element, in particular a spring, preferably a torsion, compression, and/or tension spring (possibly both into the locking and the unlocking position, for example, if several springs or spring elements are provided). Preferably, the at least one fastening element is preloaded into the unlocking position.

According to the embodiment, the at least one fastening element, preferably the at least one hook, can be transferred into the locking position by placing the seat element on it.

The fastening device preferably comprises at least one locking device (locking element), preferably one locking device (locking element) per fastening element, wherein the fastening device or the fastening element can be held (locked) in the locking position and/or unlocking position by the locking device.

The at least one fastening element can have a first and/or second latching region against which the locking element can engage. Preferably, the engagement of the locking element against the first latching region maintains (locks) the locking position of the fastening element. The engagement against the second latching region preferably prevents further rotation in the unlocked position away from the locking position.

The locking device (the locking element) can be prestressed by an elastic element, in particular a spring, preferably at least one torsion, compression and/or tension spring, preferably a tension spring, in the direction of the fastening device (the fastening element), preferably away from the second locking region towards the first locking region.

The fastening device can preferably comprise exactly four fastening elements, preferably four hooks, wherein further preferably two fastening elements can always be connected to each other by a (fixed) connection, for example by a cross strut, in order to enable simultaneous movement in to enable the unlocking and/or locking position (and vice versa). Preferably, the fastening device can comprise two pairs of fastening elements.

Preferably, the fastening element pairs can be coupled to one another by a (first) connecting element such that both fastening element pairs can be moved simultaneously into the locking and/or unlocking position.

Preferably, (four) locking elements can be provided corresponding to the (four) fastening elements, which can further preferably (likewise) be designed as pairs (corresponding fastening element pairs) and can be connected to one another by a (further) (fixed) connection, e.g. by a (further) cross strut.

Preferably, at least one pair of locking elements can be preloaded by an elastic element, in particular a torsion, compression, and/or tension spring, in the direction of the fastening element, away from the second locking region toward the first locking region. Preferably, a tension spring is arranged between the (fixed) connection of the pair of locking elements and the rotary element to preload the pair of locking elements.

Additionally or alternatively, the locking element pairs can be coupled to each other via a (second) connecting element, whereby only one locking element pair needs to be preloaded by an elastic element.

The fastening device can be assigned a second actuating device which, when actuated, moves the fastening device from the locking position to the unlocking position, preferably independently of the position of the selection element or the configuration of the child seat base.

In one embodiment, the second actuating device can be (operatively) connected to a pair of fastening elements, wherein actuation of the second actuating device transfers the pair of fastening elements into the unlocking position, whereby the second pair of fastening elements can also be transferred into the unlocking position via the (first) connecting element. In one embodiment, the second actuating device can be (operatively) connected to a pair of locking elements, wherein an actuation of the second actuating device moves the pair(s) of locking elements away from the first locking region and towards the second locking region, whereby the (respective) pair of fastening elements is no longer held or locked in the locking position by the (respective) pair of locking elements and is transferred into the locking position by the at least one elastic element, in particular a torsion, compression and/or tension spring.

Preferably, the second actuating device may comprise at least one projection which can press and/or pull on the (fixed) connection, in particular cross strut, between a pair of fastening elements and/or locking elements in order to unlock the fastening device.

The rotary and/or base element may have a second indicator device to indicate a locking and/or unlocking position of the fastening device.

The second indicator device can be (operatively) connected to the (second) actuating and/or fastening device and/or arranged directly on the second actuating device in order to indicate a locking and/or unlocking position of the fastening device.

The second indicator device is preferably configured to emit an acoustic and/or optical signal corresponding to a locking and/or unlocking position of the fastening device.

The second indicator device is preferably configured to emit a first acoustic and/or optical signal when all fastening elements are in the locking position and to emit a second acoustic and/or optical signal when at least one fastening element of a plurality of fastening elements and/or the only fastening element present is in an unlocking position.

In one embodiment, the second indicator device can be arranged directly on the second actuating device, wherein the second indicator device, optionally, in the first configuration of the child seat base and/or first position of the selection element and can only be active in the second and/or third configuration of the child seat base and/or position of the selection element.

In one embodiment, the second indicator device can be arranged directly on the second actuating device, wherein the second indicator device is active in any configuration of the child seat base and/or position of the selection element. The second actuating device can preferably be (permanently) supported on a cross member of a pair of locking elements by an elastic element, preferably a torsion spring, between the rotary element and the second actuating device. This allows the second actuating device to (always) change to an actuated position when the fastening device is transferred to the unlocked position, even if this position is unlocked by the first actuating device in conjunction with the transmission device.

The selection device (the selection element) can be arranged at least partially in a translational and/or rotational manner on the base element or the rotary element, preferably spatially spaced from the first and/or second actuating device. Particularly preferably, the selection device (the selection element) bears against the rotary element in a translational, in particular displaceable, manner.

The selection element may comprise at least one, preferably at least two of the following positions, more preferably all three of the following positions, wherein each position may correspond to a configuration of the child seat base:

First position/configuration:

- A rotation of the rotary element is permitted to a limited extent, preferably over a maximum angular range of at least 10°, preferably at least 90°, even more preferably at least 170° and/or at most 350°, preferably at most 280°, possibly at most 190°; and/or - a transfer of the unlocking of the locking device to the fastening device and/or a transfer of the unlocking of the fastening device to the locking device is enabled.

Second position/configuration:

- a rotation of the rotary element is permitted to a limited extent, preferably over a maximum angular range of at least 10°, preferably at least 90°, even more preferably at least 170° and/or at most 350°, preferably at most 280°, possibly at most 190°, and/or

- a transfer of the unlocking of the locking device to the fastening device and/or a transfer of the unlocking of the fastening device to the locking device is not permitted.

Third position/configuration:

- rotation of the rotating element is permitted without limitation or at least over an angular range of at least 350°, preferably at least 360°; and/or

- a transfer of the unlocking of the locking device to the fastening device and/or a transfer of the unlocking of the fastening device to the locking device is not permitted.

The selection device (the selection element) may comprise a guide and/or a groove in which the rotation-limiting element is arranged, such that the rotation-limiting element can engage in the rotation-limiting structure in the first and/or second position of the selection device (the selection element) and/or can be moved out of the rotation-limiting structure in the third position of the selection device (the selection element). In one embodiment, the guide and/or groove of the selection device (of the selection element) can be at least partially angled, whereby the rotation-limiting element is pulled out of the rotation-limiting structure in the third position of the selection device (of the selection element) and interacts with the transmission device in such a way that the selection device (of the selection element) releases or does not release the transmission device, depending on the position. Preferably, the transmission device is released in the first position of the selection device (of the selection element) and/or not released in the second and/or third position of the selection device (of the selection element).

In one embodiment, the selection device (the selection element) may comprise a (blocking) structure to block the transmission device in the second and/or third position of the selection device (the selection element).

In one embodiment, the selection device (the selection element) may comprise a guide in which the transmission device is arranged, wherein a movement of the transmission device within the guide can be blocked in the second and/or third position of the selection device (the selection element) and/or the transmission device can be pushed out of the guide and/or decoupled.

The transmission device can be arranged on the rotary element and/or in the base element, in particular between the locking and fastening device.

The transmission device can comprise exactly one transmission direction, such that an unlocking of the locking device can be transmitted to the fastening device (and/or vice versa), but in particular not the unlocking of the fastening device to the locking device (and/or vice versa). Preferably, the locking and fastening devices are not (forcefully) connected to one another by the transmission device.

The transmission depends on the configuration of the child seat base or the position of the selection device (the selection element). Preferably, the transmission is enabled in the first configuration or position and not enabled in the second and/or third configuration or position.

If the transmission of the unlocking is enabled in the first position of the selection device (of the selection element) or in the first configuration of the child seat base, a movement of the transmission device can be blocked by the locking device (or fastening device) until the blocking is lifted by actuating the first (and/or second) actuating device simultaneously with - and/or as a consequence of - the unlocking of the locking device (or fastening device), whereby the fastening device (or locking device) can be unlocked by the transmission device.

If the transmission of the unlocking is not enabled in the second and/or third position of the selection device (of the selection element) or in the second and/or third configuration of the child seat base, a movement of the transmission device can be blocked by a (blocking) element and/or a (blocking) structure.

In one embodiment, the transmission device can be blocked by the selection device (the selection element) or the selection device (the selection element) can comprise the (blocking) element and/or the (blocking) structure.

In one embodiment, the transmission device can be arranged in a guide, wherein movement within the guide can be blocked and/or the transmission device can be pushed out of the guide and/or decoupled therefrom, in particular by the selection device (the selection element). Alternatively or additionally, the selection device (the selection element) can comprise the guide, wherein a specific position of the selection device (the selection element), in particular the second and/or third position, blocks movement within the guide and/or pushes the transmission device out of the guide and/or decouples the transmission device from the guide. The transmission device may consist of one or more transmission elements (and possibly other parts) which may be connected to one another in a rotational and/or translational manner and/or may be movably mounted within the child seat base, in particular spatially between and/or in the vicinity of the locking and/or fastening device.

In the case of several transmission elements, the individual transmission elements can be mounted rotationally and/or translationally within the child seat base, wherein the transmission elements can be arranged in such a way that transmission can be realized by contact, for example by pressing a first transmission element onto a second transmission element and vice versa.

The transmission device may comprise at least one elastic element, e.g., a torsion, tension, and/or compression spring, which preloads the transmission device such that the fastening device or locking device can be permanently unlocked by the transmission device as long as the transmission device is not blocked.

The transmission device can have a first and a second free end, wherein the first free end can interact with the locking device or the fastening device and the second free end can interact with the other of the said devices, so that unlocking of the locking device or the fastening device drives the transmission device, in particular the first free end, and/or allows driving by the elastic element in such a way that the second free end can drive the other of the said devices for unlocking, preferably by displacing a component of the fastening device, e.g. by pushing and/or pulling and/or rotating this component, more preferably by displacing the fixed connection of the pair of locking and/or fastening elements, in particular by displacing a cross strut arranged between the pair of locking and/or fastening elements, or by displacing a component of the locking device, e.g. by pushing and/or pulling and/or rotating this component, preferably the locking element. In one embodiment, the transmission device may comprise a first and a second transmission element rotatably arranged on the rotary element, wherein the first transmission element may additionally be rotatably connected to the second transmission element.

In a specific embodiment, the transmission device can have a first and a second transmission element rotatably arranged on the rotary element, wherein the first and second transmission elements only contact each other without being firmly connected to each other.

The first transmission element may comprise a first free end which can cooperate with the locking device, and the second transmission element may comprise a second free end which can cooperate with the fastening device.

The first free end can be arranged according to an orientation holding structure of the rotary element, preferably a transport orientation, more preferably the transport orientation opposite to the direction of travel, wherein a movement of the transmission element can be blocked by the locking element.

The first and/or second transmission element, preferably the second transmission element, can be prestressed by an elastic element, in particular by a compression spring, which is arranged between the second transmission element and the rotary element, such that the first transmission element or its first free end can be at least partially moved away from the alignment holding structure, in particular can be at least partially rotated out of it.

In a state in which the selection element is in the first position and/or the child seat base is in the first configuration, and the locking device is in the locking position, the first free end of the first transmission element is preferably held by the locking element in the alignment holding structure, whereby the first transmission element presses on the second transmission element such that the second free end of the second transmission element is in a position away held by a component of the fastening device and thus blocking the transmission device.

If the first actuating device is now actuated by a user, the locking element is preferably pulled out of the alignment holding structure, thereby releasing the movement or rotation of the first free end or the first transmission element.

According to the embodiment, the second transmission element is no longer acted upon (pressed) by the rotation of the first transmission element, whereby the second free end of the second transmission element is rotated (by the compression spring) towards a component of the fastening device and presses on this component, preferably on the (fixed) connection between the pair of locking elements, in particular on the cross strut arranged between the pair of locking elements, whereby the pair of locking elements is preferably moved in such a way that the pair of fastening elements is no longer held in the locking position and thus moves or rotates into the unlocking position by the elastic element, preferably the torsion spring arranged on the axis of the fastening element.

In a state in which the selection device (the selection element) is in the second and/or third position or the child seat base is in the second and/or third configuration, the first free end is held in the alignment holding structure by the blocking structure of the selection device (the selection element), whereby a transmission of the unlocking is prevented regardless of the locking and/or unlocking position of the locking device.

The following four paragraphs refer preferably to the first configuration, in particular only to the first configuration of the child seat base.

In particular, an actual transmission of the unlocking can only take place if the fastening device and the locking device are previously in the locking position at the same time. According to the design, the transmission device can permanently unlock the fastening device if the transmission device is not blocked by the selection device (the selection element) and/or the locking device (the locking element).

In particular, the fastening device does not lock as long as the transmission device is not blocked by the selection device (the selection element) and/or the locking device (the locking element) (in specific embodiments, the hooks of the fastening device can rotate into a closed position by placing the seat element on it, but cannot be held in this position).

In a specific embodiment, the transmission device (the transmission element) can only be blocked by the locking element in a transport orientation opposite to the direction of travel.

The above-mentioned object is achieved in particular by a child seat for attachment to a vehicle seat, comprising the above child seat base and a seat element, preferably comprising a seat area and optionally a back section with a backrest.

The above-mentioned object is achieved in particular by a vehicle, in particular a motor vehicle, comprising the above-mentioned child seat, wherein the child seat is detachably attachable or attached to the vehicle.

The above-mentioned object is achieved in particular by a method for adjusting the above-mentioned child seat base or the above-mentioned child seat or the above-mentioned motor vehicle. In this case, the locking device and/or the fastening device are preferably actuated. Further method features emerge from the description of the corresponding configurations, purposes and functions, as explained in connection with the child seat base as well as the child seat and the vehicle, which can each be implemented by corresponding method steps. In particular, the first and/or the second actuating device can be actuated. The rotating element can be rotated. The seat element can be removed from the child seat base and/or connected/fixed to it. The selection device can be moved to the first, second and, if necessary, third position.

Further features arise from the subclaims.

The invention is explained in more detail below using exemplary embodiments. In the following:

Fig. 1 is an oblique view of a child seat base according to the invention;

Fig. 2 is an exploded view of parts of the child seat base according to Fig. 1;

Fig. 3 shows a rotating element of the child seat base according to Fig. 1 in an oblique view from below;

Fig. 4 shows a section of the child seat base according to Fig. 1 in a view from above;

Fig. 5 shows a section of parts of the child seat base according to Fig. 1 in an oblique view;

Fig. 6 shows a section of parts of the child seat base according to Fig. 1 in a sectional view;

Fig. 7 shows a section of parts of the child seat base according to Fig. 1 in an oblique view;

Fig. 8 shows a section of parts of the child seat base analogous to Fig. 6 in a further configuration;

Fig. 9 shows a section of parts of the child seat base analogous to Fig. 7 in the configuration according to Fig. 8;

Fig. 10 shows a section of the child seat base analogous to Fig. 4 in a further configuration; Fig. 11 shows a section of parts of the child seat base analogous to Fig. 5 in the configuration according to Fig. 10;

Fig. 12 shows a section of parts of the child seat base analogous to Fig. 6 in the configuration according to Fig. 10;

Fig. 13 shows a section of parts of the child seat base analogous to Fig. 7 in the configuration according to Fig. 10;

Fig. 14 shows a section of the child seat base analogous to Fig. 4 in a further configuration;

Fig. 15 is a sectional view of the child seat base according to Fig. 1;

Fig. 16 is an oblique view of parts of the child seat base according to Fig. 1;

Fig. 17 is a sectional view analogous to Fig. 15 in a further configuration;

Fig. 18 is an oblique view of parts of the child seat base according to Fig. 1; and

Fig. 19 is an oblique view analogous to Fig. 18 in a further configuration.

In the following description, the same reference numbers are used for identical and equivalent parts.

Fig. 1 shows a child seat base 10 according to the invention. This comprises a base element 11 and a rotating element 12 mounted rotatably relative to the base element 11 (about an at least substantially vertical axis). A fastening device 13 comprises (four) fastening elements 14, via which a seat element (not shown in Fig. 1) (for example, a seat element for accommodating a child, for example, comprising a seating area and a backrest) can be fastened to the child seat base 10, specifically the rotating element 12. Furthermore, an (optional) first indicator device 15 and an (optional) second indicator device 16 can be seen. The first indicator device 15 is coupled to the locking device 32 (in particular the locking element 34) and the second indicator device 16 is coupled to the fastening device 13.

Depending on whether the locking device 32 and/or the fastening device 13 is in an unlocking position or a locking position, the respectively assigned indicator devices (15, 16) indicate the unlocking and/or locking position of the respective device (32, 13).

Furthermore, Fig. 1 shows a first actuating device 17 and a second actuating device 18, the function of which will be described in more detail below. The first actuating device 17 comprises actuating elements 19 in a respective front lateral region of the child seat base 10, or specifically of the base element 11. The second actuating device 18 is arranged at a (front) end of the rotating element 12 in the position shown in Fig. 1, at least substantially centrally. Furthermore, a selection device (selection element) 20, which will be explained in more detail below, can be seen.

Fig. 2 shows parts of the child seat base according to Fig. 1 in an exploded view. It can be seen that the fastening device 13 has four fastening elements 14 (arranged in two pairs). The number and arrangement of the fastening elements is not mandatory, however. Each pair of fastening elements 14 is preferably connected to one another via a (respective) cross strut 21. The cross struts 21 can in turn be connected to one another via a (first) connecting element 22. Furthermore, four locking elements 23 (each arranged in pairs) (although the exact arrangement and number are not absolutely important here) can be connected to one another, with each pair of locking elements being connected via a cross strut 24 and the two cross struts 24 in turn being connected to one another via a (second) connecting element 25.

Fig. 2 also shows the second actuating device 18 and the second indicator device 16. Because the fastening elements 14 are coupled to one another, simultaneous unlocking and locking is possible. When the actuating device 18 is actuated, projections 26 press on one of the cross struts 24, whereby the locking elements 23 are rotated (partially mediated by the connecting element 25) (from a second locking area 37 into a first 38).

Finally, Fig. 2 shows a transmission device 27 and a rotation limiting element 28, which is in (operative) connection with the selection device 20. The selection device 20 has a limiting structure 29.

Fig. 3 shows the rotating element 12 from below. A (stable) alignment support structure 30 is shown for holding the rotating element in a stable manner, for example, in a forward and/or backward orientation relative to the base element 11, as well as an (unstable) alignment support structure 31, for example, for holding the rotating element (and thus also the seat element) relative to the base element 11 in such a way that it is no longer held when a force threshold is exceeded (particularly in the sense of a soft lock). To implement such a "soft lock," for example, at least one corresponding bevel and/or at least one spring can be provided. Sections of the rotation-limiting element 28 and the transmission device 27 are also visible.

Fig. 4 shows a section of the child seat base in a top view. The selection device 20 is in a first position, and the child seat base is thus in a first configuration.

In the first configuration, rotation of the rotating element 12 is permitted to a limited extent, preferably over a maximum angular range of at most 250°, more preferably at most 275°, and even more preferably at most 185°. Alternatively or additionally, transmission of the unlocking of a locking device 32 (see Fig. 6) to the fastening device 13 is permitted.

Fig. 5 also shows a section of parts of the child seat base, with the selection device 20 in the first position and thus the child seat base in the first configuration. In this position, the limiting structure 29 does not prevent transmission by the transmission device 27. Furthermore, the rotation limiting element 28 is not removed (lifted) from a rotation limiting structure 33 (see Fig. 16) (from the selection device 20), so that the rotation is limited by the rotation limiting structure.

The design and integration of the locking device 32 can be seen in further detail in Fig. 6. The locking device 32 has a locking element 34 and is (operatively) connected to the first actuating device 17. In Fig. 6, both the locking device 32 (with the locking element 34) and the fastening device 13 (with the illustrated fastening element 14) are in a locking state. The locking device 32 (or the locking element 34) can be preloaded toward the alignment support structure 30 by a spring (only schematically illustrated; e.g., compression spring and/or coil spring).

The fastening device 13 (or the corresponding fastening elements 14) can be pre-tensioned into the unlocking position by a torsion spring (not shown) on its rotation axis, but can be held in its locking position by the engagement of a corresponding locking device (or, according to the embodiment, a corresponding locking element 23, not visible in Fig. 6) on a second latching area 37.

The locking device (or specifically the respective locking element 23) can be pre-tensioned (in the direction of the second locking area 37) by a spring (in particular a tension spring, not visible, but preferably arranged on the one hand on a cross strut 24, and on the other hand on the rotary element 12).

The locking device 32 also presses a first transmission element 35 into the alignment support structure 30 to block the transmission of the unlocking action. A second transmission element 36 (of the transmission device 27) is preloaded by a spring (e.g., a compression spring and/or coil spring; not visible, but preferably arranged at least substantially horizontally in the child seat base between the second transmission element 35 and the rotating element 12) such that the second transmission element 36 rotates clockwise in the illustration according to Fig. 6. In an alternative embodiment, the first and second transmission elements 35, 36 can also be replaced by a common transmission element. The locking device (or locking element) and the fastening device (or fastening element) can also be directly connected to one another (operative connection).

In the illustrated embodiment, the first transmission element 35 is rotatably connected to the second transmission element 36 and is preloaded by a spring (e.g. compression spring and/or coil spring) such that the first transmission element 35 rotates counterclockwise.

In the configuration according to Fig. 6 (see Fig. 7), the limiting structure 29 of the selection device 20 is spaced apart from the first transmission element 35, whereby the transmission of the unlocking is essentially enabled, but is (temporarily) blocked by the locking device 32. Fig. 7 also shows that the (respective) blocking element 23 abuts against an associated second locking region 37 of the (respective) fastening element 14 and not against a first locking region 38. By this abutment against the second locking region 37, the fastening device (or the corresponding fastening element 14) is held in its locked position.

If the first actuating device 17 is actuated in the position of the selection device 20 according to Fig. 7 or the first configuration, as shown in Fig. 8, the locking device 32 and the fastening device 13 are unlocked.

Specifically, in Fig. 8, the locking device 32 was pulled out of the alignment support structure 30 by actuating the first actuating device 17, whereby the first transmission element 35 was rotated counterclockwise (by the associated compression spring) and thus the second transmission element 36 was rotated clockwise, which in turn results in this unlocking process of the locking device being transmitted to the fastening device 13.

The second transmission element 36 presses on the cross strut 24, which in turn is assigned to the locking device (or specifically the corresponding locking elements 23) (or is arranged between a pair of locking elements 23 is), whereby the (respective) locking element 23 (not visible in Fig. 8) was rotated counterclockwise towards the first locking area 38 (cf. Fig. 7 and 8).

In principle, only one locking element 23 can be provided and/or the cross strut 24 can be omitted.

In the state according to Fig. 8, the fastening device 13 (or the fastening element 14) was transferred into the unlocking position by the corresponding spring (in particular rotation spring), namely by rotation of the (respective) locking element 23 away from the second locking area 37 towards the first locking area 38.

The (respective) locking element 23 now rests against the respective first locking area 38, which prevents further counterclockwise rotation of the fastening device 13 (or the fastening element 14). The state according to Fig. 8 is shown again in a different view (oblique view) in Fig. 9.

Fig. 10 shows a view analogous to Fig. 4, wherein the selection device has been transferred to a second position and the child seat base is accordingly in a second configuration. Rotation of the rotating element 12 is preferably enabled to a limited extent in this second configuration (particularly as explained in connection with the first configuration). Alternatively or additionally, transmission of the unlocking process of the locking device 32 to the fastening device 13 is not enabled (particularly in contrast to the first configuration).

As can be seen in Fig. 11, the transmission device 27 (specifically the first transmission element 35) is now blocked by the limiting structure 29 of the selection device 20.

However, the rotation limiting element 28 is not removed (lifted out) from the rotation limiting structure 30 shown in Fig. 16 (particularly as in the first configuration), so that only a limited rotation of the rotating element 12 relative to the base element 11 is still possible. As a result, only the locking device 32 can be unlocked via the first actuating device 17 (but no longer the fastening device 13, see Fig. 12, wherein the actuating device 17 is not actuated, and Fig. 13, wherein the actuating device 17 is actuated).

Fig. 14 shows the selection device 20 in a third position (or the child seat base in a third configuration).

One difference between the second and third configurations (positions) is that the rotation limiting element 28 is pulled out of the rotation limiting structure 33 (cf. Fig. 16) in the base element 11 by the selection device 20 (not shown). This is illustrated again in Figs. 15-17. Fig. 15 again shows the second configuration of the child seat base (with the selection device in the second position). The rotation limiting element 28 is located in the rotation limiting structure 33. In Fig. 17, the rotation limiting element 28 has been removed from the rotation limiting structure 33, so that the base element (as can be seen in Fig. 17) could also be rotated beyond the (circular arc-shaped) rotation limiting structure 33.

Fig. 18 again shows parts of the child seat base, with the fastening device 13 locked. The locking device (or its respective locking element 23) rests against the second locking area 37.

Regardless of the position of the selection device 20, the locking device (or the respective locking element 23) can be moved (rotated) by actuating the second actuating device 18 so that it rests (see Fig. 19) on the first locking area 38, whereby (preferably due to a spring preload) the fastening device 13 (or the corresponding fastening element 14) moves into the unlocking position.

At this point, it should be noted that all parts described above, viewed individually and in any combination, particularly the details shown in the drawings, are claimed as essential to the invention. Modifications to these are familiar to those skilled in the art. Furthermore, it is pointed out that the broadest possible scope of protection is sought. In this respect, the disclosure contained in the claims can also be clarified by features that are described with further features (even without these further features being mandatory). It is explicitly pointed out that parentheses and the term "in particular" are intended to emphasize the optionality of features in the respective context (which does not mean, conversely, that without such identification, a feature is to be considered mandatory in the corresponding context). The term "element/element" is preferably intended to characterize a coherent structure (or assembly), which in turn can be connected to at least one other structure (to form a possibly one-piece and/or inherently immobile overall structure) or can be delimited from all other structures.

List of reference symbols

10 child seat base

11 Base element

12 rotating element

13 Fastening device

14 Fastening element

15 first indicator device

16 second indicator device

17 first actuating device

18 second actuating device

19 Actuating element

20 Selection device (selection element)

21 Cross brace

22 Connecting element

23 Locking element

24 Cross brace

25 connecting element

26 lead

27 Transmission device

28 Rotation limiting element 29 Boundary structure

30 (stable) alignment support structure

31 (unstable) alignment support structure

32 Locking device 33 Rotation limiting structure

34 Locking element

35 first transmission element

36 second transmission element

37 second rest area 38 first rest area

Claims

Claims 1. A child seat base (10) for attachment to a vehicle seat, comprising: a base element (11) and a rotary element (12) rotatably arranged on the base element (11), a locking device (32) for releasably locking an orientation of the rotary element (12) relative to the base element (11), wherein the locking device can assume a locking position for establishing a selected orientation or an unlocking position for enabling rotation, a fastening device (13) associated with the rotary element (12) for fastening a seat element to the rotary element (12), wherein the fastening device (13) can assume an unlocking position and a locking position, and a first actuating device (17) for actuating both the locking device and the fastening device (13) and a second actuating device (18) for actuating the locking device but not the fastening device (13), or for actuating the fastening device (13) but not the locking device. 2. Child seat base (10), in particular according to claim 1, comprising: a base element (11) and a rotary element (12) rotatably arranged on the base element (11), a locking device (32) for releasably locking an orientation of the rotary element (12) relative to the base element (11), wherein the locking device can assume a locking position for establishing a selected orientation or an unlocking position for releasing rotation, and a fastening device (13) associated with the rotary element (12) for fastening a seat element on the rotary element (12), wherein the fastening device (13) can assume an unlocking position and a locking position, wherein - in at least a first configuration of the child seat base (10) - a transfer of the locking device into the unlocking position causes an unlocking of the fastening device (13) and/or vice versa. 3. Child seat base (10), in particular according to claim 1 or, comprising: a base element (11) and a rotary element (12) rotatably arranged on the base element (11), a locking device (32) for releasably locking an orientation of the rotary element (12) relative to the base element (11), wherein the locking device can assume a locking position for establishing a selected orientation or an unlocking position for releasing the rotation, a fastening device (13) associated with the rotary element (12) for fastening a seat element on the rotary element (12), wherein the fastening device (13) can assume an unlocking position and a locking position, and a selection device i) for selecting one of at least one first and at least one second configuration, wherein the first configuration differs from the second configuration both with regard to the actuatability of the fastening device (13) and with regard to the extent of the rotatability of the rotary element (12) relative to the base element (11), and/or ii) for selecting a of at least a first, at least a second and at least a third configuration, wherein each of the three configurations differs with regard to the operability of the fastening device (13) and/or with regard to the rotatability, in particular the extent of rotatability, of the rotating element (12) relative to the base element (11) differs from the other configurations. 4. A child seat base (10) for attachment to a vehicle seat, comprising: a base element (11) and a rotary element (12) rotatably arranged on the base element (11), a locking device (32) for releasably locking an orientation of the rotary element (12) relative to the base element (11), wherein the locking device can assume a locking position for establishing a selected orientation or an unlocking position for enabling rotation, a fastening device (13) associated with the rotary element (12) for fastening a seat element to the rotary element (12), wherein the fastening device (13) can assume an unlocking position and a locking position, and a first actuating device (17) for jointly actuating both the locking device and the fastening device (13) - in at least a first configuration of the child seat base (10). 5. Child seat base (10) according to one of the preceding claims, wherein in at least a second configuration of the child seat base (10), i) a transfer of the locking device (32) into its unlocking position is not accompanied by a transfer of the fastening device (13) into its unlocking position and/or vice versa, and/or ii) an actuation of the first actuating device (17) causes the locking device to be transferred into its unlocking position, but not the fastening device (13) to be transferred into its unlocking position, and/or vice versa. 6. Child seat base (10) according to one of the preceding claims, comprising a transmission device for transmitting an unlocking of the locking device (32) to the fastening device (13), wherein preferably: That the transmission device (27) is arranged on the rotary element between the locking and fastening device; and/or that the transmission device (27) is configured to transmit an unlocking of the locking device to the fastening device, but preferably not the unlocking of the fastening device to the locking device; and/or that the transmission device (27) is configured so that a selection device is enabled or disabled depending on a/the configuration of the child seat base (10) and/or the position, wherein the transmission is preferably enabled in a/the first configuration and/or position and not enabled in a/the second and/or a/the third configuration and/or position; and/or that the transmission device (27) comprises one or more transmission elements (35, 36), which are preferably connected to one another in a rotational and/or translational manner and/or are movably mounted within the child seat base, in particular spatially between and/or in the vicinity of the locking device (32) and/or the fastening device (13). 7. Child seat base (10) according to one of the preceding claims, comprising a/the selection device (20) which can assume at least a first and a second position and optionally at least a third position, in particular only the first and second positions and optionally the third position, wherein the child seat base (10) is in a/the first configuration in the first position of the selection device (20) and is in a/the second configuration in the second position of the selection device, and preferably is in a third configuration in the third position, wherein preferably a rotation of the rotary element (12) relative to the base element (11) in the first and/or second position of the selection device (20) or in the first and/or second configuration of the child seat base (10) by at least 10° and/or at most 350° is enabled and/or a rotation of the rotary element (12) relative to the base element (11) in the third position of the selection device (20) or in the third configuration by 360° or more is enabled. 8. Child seat base (10) according to one of the preceding claims, wherein the locking device (32): comprises or is formed from a locking element (34) which can engage with at least one alignment holding structure, wherein the locking element (34) is preferably located within the alignment holding structure in the locked position and/or outside the alignment holding structure in the unlocked position; and/or is arranged on and/or within the rotary element (12) and/or the base element (11), preferably on and/or within the base element (11), preferably movable in translation and/or rotation; and/or is prestressed in the direction of the alignment holding structure by an elastic element, for example a spring, in particular a torsion, tension and/or compression spring; and/or is arranged in a front region of the base element (11) and/or is optionally prestressed in the direction of the vertical axis of rotation of the rotary element. 9. Child seat base (10) according to one of the preceding claims, wherein a/the first actuating device (17) comprises at least or exactly one, preferably at least or exactly two, actuating element(s), preferably in a front and/or lateral region of the base and/or rotating element (12). 10. Child seat base (10) according to one of the preceding claims, wherein the fastening device (13) comprises at least or exactly one, preferably at least or exactly two, more preferably at least four or exactly four fastening elements (14), preferably hooks. 11. A child seat for mounting on a vehicle seat, comprising a child seat base (10) according to any one of the preceding claims and a Seating element, preferably comprising a seating area and optionally a back section with a backrest. 12. A method for adjusting a child seat base or a child seat according to one of the preceding claims, wherein the locking device (32) and/or the fastening device (13) are actuated.