Securing system for child safety seat

Abstract

The invention relates to a telescopic system (100) for securing a child safety seat (10) and and / or a base for a child safety seat (11) on a motor vehicle seat (1), wherein the telescopic system (100) comprises a first section (110) and a second section (120), wherein the first and second sections can be moved relative to one another in a longitudinal direction in order to adjust a length of the telescopic system (100), wherein a first locking means (200) is attached in or on the second section, wherein the telescopic system can be moved into at least one first, second and third configuration, wherein adjusting the length of the telescopic system (100) is enabled in the first configuration, wherein adjusting the length of the telescopic system (100) is enabled in a limited manner in the second configuration compared to the first configuration, and adjusting the length of the telescopic system (100) is not possible or is enabled in a limited manner in the third configuration compared to the second configuration.

Description

[0001] Fastening system for child seats

[0002] Description

[0003] The invention relates to a telescopic system for attaching a child seat and / or a base for a child seat to a motor vehicle seat.

[0004] The expert understands a child seat to be a child restraint system intended for transporting a child in a vehicle, preferably a motor vehicle.

[0005] In this context, it should be noted that, within the scope of this invention, the term "child seat" is to be understood as a generic term for (classic) child seats, infant carriers, booster seats, seat risers, etc. Thus, features intended for a child seat within the scope of this invention are generally also applicable to an infant carrier and vice versa, unless otherwise stated. The same applies to the term "child," which is also to be understood as a generic term for children, babies, and toddlers.

[0006] It should be noted that in the context of this invention, the term "child seat" is to be understood as a generic term for (classic) child seats, baby car seats, booster seats, seat elevations, etc. For example, the child seat of this invention can be a (classic) child seat (for older children, e.g. Group I / II and / or III child seat) which has a backrest that is structurally separated from a seating area, the inclination of which can be varied relative to the seating area if necessary. The structural separation can be formed, for example, by a bend or similar. In general, however (unless stated otherwise in the specific context), child seat is always to be understood as an abbreviation for "child seat, e.g. baby car seat, booster seat and / or seat elevations".Within the scope of this invention, features intended for a (conventional) child seat are in principle also applicable, for example, to an infant car seat, a booster seat, and / or a booster seat, and vice versa (unless otherwise stated). The same applies to the term "child," which is also to be understood as a generic term for children, babies, and toddlers. So-called "infant car seats" often comprise (only) a one-piece shell for accommodating the baby or child and may include its own belt system, possibly a headrest, and possibly other components. Instead of a (structurally defined) backrest, such "infant car seats" have a back section that adjoins a "seating area" in which the child's buttocks can be accommodated.

[0007] The expert defines the "base for a child seat" as a base on which a child seat can be attached, either detachably or permanently.

[0008] Child seats, infant carriers, booster seats, etc., that can be attached to a vehicle seat have been around for some time. Such child seats, infant carriers, booster seats, etc., serve as seating for children, babies, and toddlers, offering them increased protection, particularly in the event of an accident and / or emergency braking. Such child seats can be attached using the car's belt system or via Isofix anchorages. This type of attachment secures the child seat to the vehicle seat in the event of an accident, ensuring that it is held in place and prevented from being thrown forward, particularly in the event of a rear-end collision (impact) and / or emergency braking.

[0009] Since such child seats often have to be moved between different vehicles, especially motor vehicles, or installed and removed, it is particularly important that the child seat's removable anchorage allows for user-friendly handling. Furthermore, however, easier handling should not come at the expense of the child's safety in traffic or in the event of an accident.

[0010] The attachment of the child seat to the vehicle seat must therefore be as stable as possible. At the same time, however, it is also desirable for the attachment to allow for a certain degree of adjustment to optimally adapt to different vehicle seats.

[0011] An adjustable telescopic system for attaching a child restraint system to a motor vehicle seat is known, for example, from EP 3 600 954 B1. However, the fastening system disclosed therein consists of a large number of different individual parts, which means that the design is considered to be in need of improvement in terms of manufacturing costs and susceptibility to failure during use.

[0012] It is therefore the object of the present invention to propose a telescopic system for attaching a child seat and / or a base for a child seat to a motor vehicle seat, which system meets the above-described requirements with regard to stability, user-friendliness, safety and universal applicability in the most cost-effective and error-free manner possible.

[0013] This problem is solved in particular by the features of claim 1.

[0014] In particular, the object is achieved by a telescopic system for attaching a child seat and / or a base for a child seat to a motor vehicle seat, wherein the telescopic system comprises a first section and a second section, wherein the first and second sections are displaceable relative to one another to adjust a length of the telescopic system (in a longitudinal direction) (wherein the sections are guided to one another via at least one first guide, wherein preferably one of the first section and / or second section is guided directly or indirectly in the longitudinal direction by at least one first guide on the other of the first section and second section), wherein a first latch is mounted in or on the second section, wherein the telescopic system is capable of being brought into at least a first, second and third configuration, wherein in the first configuration, the adjustment of the length of the telescopic system is possible,in the second configuration, the adjustment of the length of the telescope system is limited compared to the first configuration, and in the third configuration, the adjustment of the length of the telescope system is further limited compared to the second configuration or is (at least essentially) not possible.

[0015] One concept of the invention is that, in contrast to the aforementioned prior art, the length of the telescopic system is advantageously adjusted according to the aforementioned configurations using only one latch, namely the first latch. As a result, the telescopic system of the present invention is characterized by structural simplicity, while at the same time, there are no limitations in functionality compared to the prior art (with two latches).

[0016] Unless expressly stated otherwise, the terms "first," "second," etc., e.g., first hook or second spring, are used to distinguish different elements from one another. The presence of a first spring or a second spring does not necessarily imply that more than one spring must be present.

[0017] The first and second sections are displaceable relative to one another, whereby this is to be understood in particular in such a way that the first section and the second section are movable relative to one another (in particular translationally, preferably in the longitudinal direction).

[0018] Furthermore, the telescopic system may comprise a transfer element (described in more detail below) adapted to drive the first latch to be transferred from its extended position to its retracted position.

[0019] Preferably, the first section is fastened or attachable to the child seat or the base for the child seat, optionally detachably, and / or is formed integrally with the child seat or the base for the child seat at least in sections, wherein the second section is preferably provided for detachable fastening to a motor vehicle seat (wherein the motor vehicle seat in particular has a seat surface and a backrest) and has a proximal end and a distal end, wherein in the region of the distal end of the second section further preferably at least one or exactly one first hook is provided which is suitable for attaching a bracket provided on the vehicle, in particular an Isofix anchorage or an anchorage according to standard ISO 13216 or.UN ECE R 145, to couple the telescopic system to the motor vehicle seat, wherein the first hook is switchable between a first position in which it does not couple the telescopic system to the motor vehicle seat, and a second position in which it couples the telescopic system to the motor vehicle seat.

[0020] The motor vehicle seat can have (at least approximately) at least one, preferably exactly two, brackets in the transition area between the seat surface and the backrest, each of which can be gripped by the first hook of the telescopic system. The child seat or the base for a child seat can have a bottom side designed to rest on the seat surface of the motor vehicle seat. The child seat or the base for a child seat can have a back side designed to face the backrest of the motor vehicle seat and, if necessary, rest against it.

[0021] Sections of the telescopic system may be flush with the bottom and / or back of the child seat or the base for a child seat.

[0022] In embodiments, the first and / or second section have (at least substantially) a cross-section that is at least partially square and / or rectangular.

[0023] The first and / or second section are preferably at least substantially profile-like (or as profile(s), possibly hollow and / or tubular.

[0024] According to the embodiment, the first and / or second section have a height (considered over a longitudinal extent) and / or a diameter (considered over a longitudinal extent) of less than or equal to 5 cm, preferably 2 cm - 3.5 cm.

[0025] According to the embodiment, the first and / or second section have a width (considered along a longitudinal extension) of less than or equal to 3 cm, preferably 1.0 cm - 2.0 cm. The first section can partially encompass or enclose the second section.

[0026] The first section is preferably at most 40 cm long and / or at least half as long as the second section and / or at least 2 cm, preferably at least 4 cm long.

[0027] The second section is preferably at least 4 cm, more preferably at least 8 cm long and / or at most 40 cm, preferably at most 30 cm long (e.g. 20 cm long).

[0028] In some embodiments, the second section has a number of preferably inwardly directed projections. Each of the projections can be formed over an entire width (transverse to the longitudinal direction, in particular in the left-right direction) or over a portion of the width of the second section. Each of the projections can, for example, be formed as a bulge and / or as a bolt.

[0029] The second portion preferably has a first projection for supporting the first hook in its first position.

[0030] Furthermore, the second section preferably has a second projection, optionally a plurality of second projections, for guiding a latch and / or at least one third projection for guiding the transfer element. At least one optional fourth projection of the second section can serve to support the first latch in its extended position.

[0031] The first hook is preferably pre-tensioned towards its first position, in particular by a first spring. In particular, when the first hook is pre-tensioned towards the first position, a second latch (see below) can be provided in or on the second section of the telescopic system. The first hook can be rotatable about a first axis, which is preferably fixed to the second section. Furthermore, the first hook can have a first axis section or a first bearing section. The first hook can also have a locking section that is suitable for engaging around the vehicle-side bracket and / or can be C- or U-shaped. The locking section can in particular have two opposing legs, wherein one of the legs can be adjacent to an actuating section of the first hook.The first spring can be attached, in particular held and / or mounted, to a / the first axis on the first hook, and / or the first spring can be designed as a leg spring.

[0032] Alternatively, the first spring can be attached, in particular supported and / or mounted, to the first hook at a distance from the first axis, and / or the first spring can be designed as a tension spring. Other types of springs are also conceivable in principle.

[0033] A first (functional) end of the first spring can bear on the first hook. A second end of the first spring can bear on the second section. The first and a second spring (see below) can also be identical and formed by a single (first / second) spring that simultaneously biases the first hook to the first position and biases the second latch toward a locking position (see below). This is preferably achieved by a first end of the first / second spring bearing on the first hook and a second end of the first / second spring bearing on the second latch (or, if applicable, on the transfer element).

[0034] Furthermore, a force acting on the actuating portion in the longitudinal direction (e.g., as a result of pressing against the vehicle-side bracket), namely from the distal end of the second portion toward the proximal end of the second portion, can drive the first hook to be transferred from the first position to the second position.

[0035] Preferably, the telescopic system is completely retractable into the child seat or into the base for a child seat. The first section can be mounted on the child seat or the base for a child seat in such a way that it is completely retracted or at least partially flush with the child seat or the base for a child seat. The second section, in turn, can be adjusted in at least one position relative to the first section so that it is also completely retracted or at least partially flush with the child seat or the base for a child seat. The minimum length of the telescopic system and the maximum length of the telescopic system can differ by at least 4 cm, preferably at least 8 cm and / or at most 30 cm, preferably at most 20 cm.

[0036] The maximum projection of the telescopic system over the child seat or the base of the child seat may be at least 4 cm, preferably at least 8 cm, and / or at most 30 cm, preferably at most 20 cm.

[0037] Preferably, a second latch, in particular the one already described above, is provided in and / or on the second section, which is adjustable between a locking position, in particular the one already described above, in which the second latch holds the first hook in its second position and / or a release position in which the second latch does not hold the first hook in its second position.

[0038] The second latch can be pre-tensioned towards the locking position, in particular by a second spring, in particular the second spring already described above, in particular a tension spring. A first end of the second spring can be supported on the second latch. A second end of the second spring can be supported on the second section. The first hook and the second latch can be designed and arranged such that the first hook holds the second latch in the release position by means of a hook blocking section when the first hook is in its first position, and that, furthermore, a transfer of the first hook into its second position (for example by actuating the actuating section) allows a transfer of the second latch into its locking position, in particular driven by the second spring or the first / second spring.

[0039] The first hook can have an engagement portion into which the second latch engages with a locking portion when the first hook is in its second position and the second latch is in its locking position. The second latch can have a first contact portion for contacting the transfer element (see below). The second latch can also be L-shaped, in particular such that the end of one arm of the L-shape forms the locking portion and / or that the other arm of the L-shape (wholly or in sections) forms the contact portion. The second latch can be made (at least 50% by weight or at least 80% by weight) of metal, in particular of steel. The second latch can be switchable translationally (alternatively: rotationally or with a translational and rotational component) between the locking position and the release position.

[0040] Preferably, the first section has a plurality of at least two, preferably at least 4 and / or at most 15, preferably at most 10 (e.g., 8 or 9 or 10) longitudinally spaced recesses, each suitable for receiving a locking portion of the first bolt. The distance between two recesses can be in the range of 1 cm - 2 cm, e.g., 15 mm, and / or at least 3% and / or at most 50% of a maximum extension. The recesses can, in particular, be through holes.

[0041] Preferably, the first latch of the telescopic system has a locking portion that can be selectively engaged or disengaged with a counter-structure, in particular with one of the recesses of the first portion, in order to adjust the second portion relative to the first portion with regard to the length of the telescopic system (in the longitudinal direction), wherein the locking portion can preferably assume at least one retracted position (accompanying the retracted position of the first latch) according to the first configuration and / or wherein the locking portion can assume an extended position (accompanying the extended position of the first latch) according to the second and / or the third configuration. The locking portion is in particular wedge-shaped at least in sections.

[0042] Additionally or alternatively, the first latch preferably has a first engaging portion for being held in the extended position according to the third configuration. The first engaging portion may be adapted to cooperate with a latch blocking portion of the transfer element (see below) and to hold the first latch in the extended position when the transfer element is in a second non-drive position (see below).

[0043] Additionally or alternatively, the first latch preferably has a second engaging portion for being held in the retracted position according to the first configuration. The second engaging portion may be adapted to cooperate with a drive portion of the transfer element such that the first latch is driven into the retracted position when the transfer element is transferred to a drive position (see below).

[0044] Adjacent to the first action section (in particular as a recess between the first action section and the second action section), a free space can be provided such that the bolt blocking section is opposite the free space when the transfer element is in the drive position, so that the bolt blocking section of the transfer element (see below) does not block switching of the first bolt into the retracted position.

[0045] The first latch can be pre-tensioned toward the extended position, in particular by at least one third spring. The first latch can also be rotatable about a second axis, which is preferably fixed to the second section, and can have a second axis section or a second bearing section for this purpose. The third spring (or at least a third of possibly several third springs) can be attached to the second axis on the first latch, in particular held and / or mounted, and / or can be designed as a leg spring.

[0046] Alternatively or additionally (particularly if multiple third springs are provided), the third spring (or at least one third of possibly multiple third springs) can also be attached, in particular held and / or mounted, to the first bar at a distance from the second axis, and / or be designed as a tension spring. Other types of springs are also conceivable; in particular, two third springs (redundant) can also be provided.

[0047] Additionally or alternatively, the first latch preferably has a third action section, in particular as a component of the locking section, which according to the second configuration can be suitable for being contacted by an edge of a (respective, in particular above) counter-structure, in particular a recess of the first section, when a force urges the first and the second section towards each other in order to reduce the length of the telescopic system, wherein the third action section is preferably oblique (inclined) with respect to the longitudinal direction, so that the first latch is urged in the direction of the retracted position by the contacting of the third action section and the associated force.In the extended position of the first latch, a side of the locking section opposite the third action section can be arranged at least substantially perpendicular to the longitudinal direction (in particular, enclosing an angle of 80° to 100° with the longitudinal direction). Alternatively or additionally, in the extended position of the first latch, a side of the locking section forming the third action section can enclose an angle in the range of 35° to 55°, preferably 45°, with the longitudinal direction.

[0048] Preferably, the telescopic system has a transfer element, in particular the one already described above, which is arranged to be movable, preferably displaceable, in particular longitudinally displaceable (with or without a rotational component) between at least a first non-drive position, a second non-drive position and a drive position in and / or on the second section.

[0049] The transfer element preferably has a drive section that is suitable for selectively interacting with the second engaging section of the first latch to transfer the latter from the extended position to the retracted position. The drive section can be formed by a surface that is at least substantially configured such that the longitudinal direction forms its surface normal.

[0050] Additionally or alternatively, the transfer element preferably has a latch blocking section that is suitable for selectively cooperating with the first engaging section of the first latch to prevent the latter from being transferred from the extended position to the retracted position. The latch blocking section can have a blocking surface that is straight in the longitudinal direction or inclined relative thereto by at least 5° and / or at most 30°, preferably by at most 20°. If the latch blocking section is inclined, then preferably in such a way that transfer of the transfer element from the second non-drive position (in which the latch blocking section blocks transfer of the first latch to the retracted position) to the first non-drive position (which corresponds to the locking position of the second latch) is facilitated.This is also possible when a force pushes the first latch toward the retracted position. Preferably, the first latch and transfer element are coordinated such that a force for transferring the first latch from the extended position to the retracted position can be transmitted to a (not predominant) extent by the first action section to the latch blocking section in order to push the transfer element from the second non-drive position to the first non-drive position.

[0051] Preferably, the first bar is formed in one piece, possibly monolithic.

[0052] The transfer element can be biased, in particular by the second spring, towards the first non-drive position, in which the latch blocking section does not prevent the first latch from being transferred from the extended position to the retracted position, and in which the drive section does not interact with the first latch to transfer it from the extended position to the retracted position. In the first non-drive position, the adjustment of the length of the telescopic system can be permitted or enabled to a limited extent. The transfer element and the second latch can be designed and arranged such that the second latch is in the locking position when the transfer element is in the first non-drive position. In one embodiment, the transfer element comprises a second abutment section for abutting against the first abutment section of the second latch.

[0053] Additionally or alternatively, the transfer element is preferably operatively connected to the second latch such that a movement of the transfer element, optionally by means of an actuating element (of the telescopic system), can release or releases the second latch for switching between the release position and / or the locking position. In particular, a movement of the transfer element by means of the actuating element can transfer the second latch from the locking position to the release position.

[0054] The transfer element can be made of plastic (at least 50% by weight or at least 80% by weight), in particular as an injection-molded part. The second bar and transfer element can be firmly connected to one another, e.g. by fastening means and / or a section of the second bar, in particular the first contact section, can be over-molded. If, according to the embodiment, the second bar is made of metal (at least 50% by weight or at least 80% by weight) and the transfer element is made of plastic (at least 50% by weight or at least 80% by weight), on the one hand, high stability can be achieved in a relevant area and, on the other hand, weight and / or costs can be saved.

[0055] In an alternative embodiment, the second bar and transfer element can be formed monolithically.

[0056] In general, in particular the first hook, the first latch and / or the second latch (at least 50% by weight or at least 80% by weight) may be formed from metal, in particular steel.

[0057] The transfer element can have a second guide between the second section and the transfer element, specifically e.g. by a clearance, possibly a guide groove or a slot and a third projection, possibly a guide pin or bolt.

[0058] In a further embodiment, the transfer element has a release section that is longitudinally movable relative to the other components of the transfer element and is preloaded by a fifth spring towards the proximal end of the second section. This embodiment addresses the problem that it is at least theoretically conceivable that the first latch comes to a stop exactly between two recesses in the first section and can then block the entire telescopic system. If the first latch comes to a stop exactly between two recesses in the first section and a user attempts to move the second latch from its locking position to the release position by actuating the actuating element in order to enable the first hook to switch from the second position to the first position, the latch blocking section of the transfer element can run against the first action section of the first latch.According to this embodiment, however, the transfer element, with the exception of the unblocking section, can be urged toward the proximal end against the force of the fifth spring, so that the second latch can still move into the release position and the first hook into the first position, thereby preventing blocking of the telescopic system. In a further embodiment, the transfer element can have a detection section that is suitable, for example, for being detected by a sensor for determining the position of the transfer element. Accordingly, a sensor can be provided in the second section, for example, which is suitable, preferably, for detecting the position of the transfer element.In particular, whether the transfer element is in the first non-drive position and the first hook is in its second position (where the telescopic system is coupled to the motor vehicle seat), so that it can be detected whether a child seat connected to the telescopic system or a base for a child seat connected to the telescopic system is in a use state. The detection section and sensor are preferably adjacent to one another. Furthermore, the detection section and sensor can preferably be arranged between the first latch and the proximal end of the second section, or they can be arranged between the first latch and the first hook.

[0059] The transfer element is preferably operatively connected to the actuating element (of the telescopic system) for actuation by a user.

[0060] Preferably, the transfer element has support sections that directly abut the second section to support the transfer element on the second section and, if necessary, to enable the transfer element to slide along the second section. The support sections can be designed, in particular, as projections, wherein a support section can preferably be provided at the level of the locking section opposite the blocking surface.

[0061] Furthermore, the telescopic system preferably has a first pin, which is connected, in particular firmly, to the second section and / or a second pin, which is connected, in particular firmly, to the transfer element, wherein the first and second pins are preferably provided for connection to an actuating element, wherein the first section preferably has a lateral guide slot which extends in the longitudinal direction, preferably over at least 50% of the length of the first section, wherein more preferably both the first pin and the second pin extend through this. The minimum and maximum length of the telescopic system can be determined by the lateral guide slot. Preferably, the second section has an elongated hole which overlaps with a section of the lateral guide slot of the first section and guides a movement of the second pin in the longitudinal direction towards or away from the first pin.

[0062] Preferably, an actuating element, in particular the one already described above, is provided, in particular for preferably (direct or indirect) manual actuation (for setting the first, second and third configuration) by the user. A fixed section of the actuating element is preferably connected, in particular fixedly, to the second section via a / the first pin, and a movable section of the actuating element is preferably operatively connected to the transfer element via a / the second pin and / or movable relative to the fixed section. Further preferably, the actuating element or the movable section thereof can be blocked by a holding device, in particular a third latch, wherein a release actuation can be provided to release the holding device.The actuating element, in particular its release actuation, can comprise at least one button and / or at least one key and / or at least one slider and / or at least one operating lever.

[0063] Preferably, the movable portion of the actuating element is movable relative to the fixed portion (and thus also to the second portion), in particular against a force of a fourth spring.

[0064] The telescopic system preferably has an installation position (see below), wherein the first hook is in the first position, the second latch is in the release position (held by the hook blocking portion of the first hook), the transfer element is in the second non-drive position and the first latch is in the extended position according to the third configuration, wherein the release actuation (of the actuation element) is not actuated by the user.

[0065] In the event that, according to a preferred embodiment, the user, for example starting from the installation position, with the release actuation (still) not actuated, presses the first hook, in particular its actuating section, against the vehicle-side bracket, the second latch is moved into the locking position and the transfer element is moved from the second to the first non-drive position, with the first latch (still) being in the extended position according to the second configuration, and the first hook is moved into the second position (by actuating the actuating section by the vehicle-side bracket), with the two legs of the first hook gripping the vehicle-side bracket, so that the telescopic system is moved into a locking position (see below).

[0066] In the event that, according to a / the preferred embodiment, the user (now) actuates, in particular increasingly presses, the release actuation starting from the locking position, the transfer element is (initially) transferred from the first (again) to the second non-drive position and the second latch is (again) held in the release position by the hook blocking section of the first latch, wherein the first latch is (now) (still) in the extended position according to the third configuration, and wherein the first hook is brought into the first position (by the pre-tensioned first and / or first / second spring), so that the telescopic system is (again) transferred into the installation position.

[0067] In the event that, according to a / the preferred embodiment, the user, for example, actuates the release actuation starting from the installation position, in particular increasingly presses it, the transfer element is transferred from the second non-drive position to the drive position, wherein the second latch is (still) in the release position and, wherein the first latch is driven into the retracted position according to the first configuration, wherein the first hook is (still) in the first position, so that the telescopic system is transferred into an adjustment position (see below).

[0068] In the event that, according to one / the preferred embodiment, the user, for example, no longer operates the release actuation starting from the adjustment position, in particular releases the release actuation (slowly or abruptly), the telescopic system is (re)moved into the installation position.

[0069] In a further embodiment, the fixed portion of the actuating element has on its outer side a through-hole or a slot in which, depending on the position of the movable portion relative to the fixed portion, color markings applied to the movable portion can be seen in order to indicate the current position of the first hook.

[0070] The actuating element can be provided (directly) on one of the first and second sections or remotely from the first and second sections.

[0071] The telescopic system (as a whole) can preferably be moved into the following positions:

[0072] • an adjustment position, in particular the one already described above, in which the first hook is in the first position, the second latch is in the release position and the transfer element is in the drive position, wherein the first latch is in the retracted position according to the first configuration and the actuating element is actuated (in particular the user actuates the release actuation, in particular (permanently) presses and / or holds it pressed), wherein the telescopic system and thus the child seat or the base for a child seat is not attached to the motor vehicle seat, so that the length of the telescopic system is (freely) adjustable (between the minimum and maximum length), and / or

[0073] • a locking position, in particular the one already described above, in which the first hook is in the second position, the second latch is in the locking position and the transfer element is in the first non-drive position, wherein the first latch is in the extended position according to the second configuration and the actuating element is not actuated (in particular the user does not actuate the release actuation, in particular does not (increasingly) press and / or hold it pressed), so that the telescopic system and thus the child seat or the base for a child seat is attached to the motor vehicle seat, wherein the length of the telescopic system is only reducible (in particular when a force acts on the first section or on the child seat or the base for a child seat, which pushes the first and second sections towards each other), and / or

[0074] • an installation position, in particular the one already described above, in which the first hook is in the first position, the second latch is in the release position and the transfer element is in the second non-drive position, wherein the first latch is in the extended position according to the third configuration and the actuating element is not actuated (in particular the user does not actuate the release actuation, in particular does not (increasingly) press and / or hold it down), wherein the telescopic system and thus the child seat or the base for a child seat is not attached to the motor vehicle seat, so that the length of the telescopic system can be changed to a further limited extent compared to the second configuration or is not changeable, and / or

[0075] • an intermediate position when the telescopic system is shortened from the locking position and the first bolt has not yet reached the next recess (of the first section) (wherein in particular the first hook is in the second position, the second bolt is in the locking position, the transfer element is in the first non-drive position and the first bolt is in the retracted position; the actuating element is not actuated (in particular the user preferably does not actuate the release actuation, in particular does not (increasingly) press and / or hold the release actuation); and the telescopic system and thus the child seat orthe base for a child seat is attached to the motor vehicle seat), the length of the telescopic system being slightly increaseable (for example by at least 2 mm or at least 4 mm and / or by at most 2 cm or at most 1 cm), in particular until the first latch engages in the previous recess (of the first section) when the first section and the second section are pulled apart.

[0076] According to the embodiment, the intermediate position can allow, as in the locking position, the length of the telescopic system to be reduced (in particular when a force acts on the first section or on the child seat or the base for a child seat, pushing the first and second sections towards each other). By enabling a slight movement in the other direction in the intermediate position, it can be easily achieved that the user can at least engage with the previous recess, which in particular improves user-friendliness and safety. Parts made of metal, in particular stamped parts, comprising, for example, the first hook and / or the first latch and / or the second latch, can have different thicknesses and have thin regions to enable the punching of smaller holes.The thin areas can be created from the areas of normal thickness by applying high pressure (e.g. by a type of hammer blow).

[0077] The above-mentioned object is also achieved in particular by a child seat or base for a child seat, comprising two telescopic systems arranged side by side as described above, in particular for fastening the child seat or the base for a child seat to a motor vehicle seat, in particular compatible with an Isofix anchorage or an anchorage according to standard ISO 13216 or UN ECE R 145.

[0078] Furthermore, the above-mentioned object is achieved in particular by a method for attaching a child seat or a base for a child seat, as described above, to a motor vehicle seat, wherein the first and second sections are displaced relative to one another in the longitudinal direction to adjust the length of the telescopic system, wherein the telescopic system is selectively moved into the first, third and / or second configuration, preferably (successively) into the first, third and second configuration. Further method features emerge from the above and following description of the telescopic system or the child seat or the base. In particular, functional features can be implemented as concrete method steps (for example, a transfer from the third configuration to the second configuration can be implemented or initiated).

[0079] Furthermore, the above-mentioned object is also achieved in particular by a method for detaching a child seat or a base for a child seat, as described above, from a motor vehicle seat, wherein the method in particular follows or precedes the method described in the previous paragraph, wherein the telescopic system is moved from the second configuration to the third configuration or from the second configuration to the first configuration (optionally via the third configuration). Further method features emerge from the above and following description of the telescopic system or the child seat or the base. In particular, functional features can be implemented as concrete method steps (for example, a transfer from the second configuration to the third configuration can be implemented or initiated in concrete terms).

[0080] Further embodiments emerge from the subclaims.

[0081] The invention is described below using exemplary embodiments, which are explained in more detail with reference to the figures. Herein:

[0082] Fig. 1a shows a child seat with a telescopic system according to the invention;

[0083] Fig. lb the child seat according to Fig. la on a base for a child seat with the telescopic system;

[0084] Fig. lc the base for a child seat with the telescopic system;

[0085] Fig. 2 shows the base for a child seat with a bottom side for resting on a seat surface of a motor vehicle seat;

[0086] Fig. 3 shows a second section of the telescopic system according to the invention with an actuating element arranged laterally on the second section with a non-actuated release actuation

[0087] Fig. 4 is a view similar to Fig. 3 with the release actuated;

[0088] Fig. 5 is a view corresponding to Fig. 3, but now showing the internal structure of the non-actuated actuating element;

[0089] Fig. 6 is a view corresponding to Fig. 4, but now showing the internal structure of the actuated actuating element; Fig. 7 shows the telescopic system with a first section and a second section;

[0090] Fig. 8 the telescope system with only one half of the first section;

[0091] Fig. 9 is an exploded view of the second section of the telescope system;

[0092] Fig. 10 is a representation of the entire telescopic system with an enlarged view of a first bar and various sections of a transfer element;

[0093] Fig. 11 shows one half of the second section of the telescopic system with first latch according to a first configuration;

[0094] Fig. 12 shows one half of the second section of the telescopic system with first latch according to a third configuration;

[0095] Fig. 13 shows one half of the second section of the telescopic system with first latch according to a second configuration;

[0096] Fig. 14 an alternative embodiment of an inventive

[0097] Telescopic system, wherein the transfer element has a deblocking section which is movable in the longitudinal direction relative to the other components of the transfer element and pre-tensioned by a fifth spring;

[0098] Fig. 15 the telescopic system according to Fig. 14 in a locking position;

[0099] Fig. 16 the telescopic system according to Fig. 14 with the first bolt raised compared to Fig. 15;

[0100] Fig. 17 shows the telescopic system according to Fig. 14, wherein the first locking bar is located exactly between two recesses of the first section; Fig. 18 shows the telescopic system according to Fig. 14, wherein the transfer element, with the exception of the unblocking section, is pushed toward a proximal end (of the second section), so that a second locking bar is in a release position relative to Fig. 17;

[0101] Fig. 19a an interaction of parts of the telescope system in its

[0102] adjustment position;

[0103] Fig. 19b an interaction of parts of the telescope system in its

[0104] Installation position; and

[0105] Fig. 19c an interaction of parts of the telescope system in its

[0106] Locking position.

[0107] In the following description of the figures, the same reference numbers are used for identical and equivalent parts.

[0108] Fig. 1a shows a child seat 10 with a telescopic system 100 according to the invention.

[0109] Fig. lb shows the child seat 10 on a base for a child seat 11 with the telescopic system 100.

[0110] Fig. lc shows the base for a child seat 11 with the telescopic system 100.

[0111] Fig. 2 shows the base for a child seat 11 with a bottom side 12 for resting on the seat surface of a motor vehicle seat, and with a rear side 13 intended to face the backrest of the motor vehicle seat. Integrally formed with the base for the child seat 11, two first sections 110 of the telescopic system according to the invention are schematically shown. The two first sections 110 are flush at the bottom with the bottom side 12 of the base for the child seat 11. Nor do they extend beyond the rear side 13 to the rear.

[0112] Fig. 3 shows a second section 120 of the telescopic system with a proximal end 121 designed as an end cap and a distal end 122. Also shown laterally from the second section 120 is an actuating element 230 with a fixed section 231 and a movable section 232 as well as a release actuation 234. The fixed section 231 has a through-hole (without reference number) on its outer side, in which, depending on the position of the movable section 232 relative to the fixed section 231, color markings (not shown) applied to the movable section 232 can be seen to indicate the current position of the first hook 130, shown here in its second position. The release actuation 234 is not actuated, and the movable section 232 is in a starting position.The first hook 130 is located at the distal end 122 of the second section 120 and can be switched between a first position and a second position. In the second position, it includes a notch (no reference number) at the distal end 122 of the second section 120.

[0113] Fig. 4 shows the same elements as Fig. 3. In contrast to Fig. 3, however, the release actuation 234 is now actuated and the movable portion 232 is in a depressed position. The first hook 130 is in its first position, so that now only the actuating portion 134 is visible.

[0114] Fig. 5 corresponds to Fig. 3 and Fig. 6 corresponds to Fig. 4. However, the internal structure of the actuating element 230 can now be seen: It can be seen that the release actuation 234 is rotatably mounted about an axis (without a reference number). Its actuation against the force of a spring (not shown) pivots an end designed as a third latch (holding device) downward and allows the movable section 232 to be pressed in toward the proximal end 121. The pressing in of the movable section 232 also occurs against the force of a spring (also not shown) and results in the first hook 130 being moved into the first position, as explained in detail later.

[0115] Fig. 7 shows the telescopic system 100 according to the invention with the first section 110 and the second section 120. The first section 110 has a plurality of recesses 111 on its underside, shown here as through holes. On the side facing the actuating element 230 (not shown here), the first section 110 further has a lateral guide slot 112. A first pin 236 and a second pin 237 extend through this, which are used for connection to the actuating element

[0116] 230 are provided. The telescopic system 100 according to the invention is at its maximum extension.

[0117] Fig. 8 shows the telescopic system 100 according to the invention, whereby for clarity, only one half of the first section 110 is shown here. The telescopic system 100 according to the invention is shown relatively far back, and it can be seen that the first pin 236 is firmly connected to the second section 120. Furthermore, it can be seen that the second section has an elongated hole 127 through which the second pin 237 extends.

[0118] The exploded view in Fig. 9 shows that the second section 120 comprises a first half 120a and a second half 120b, as well as an end cap 120c. Furthermore, the first hook 130 together with a first / second spring 131, a transfer element 160 together with a second latch 138, the first pin 236, a first latch 200, and the elongated hole 127 can be seen.

[0119] Fig. 10 shows another representation of the entire telescopic system 100 according to the invention with the first section 110 and the second section 120. It can be seen that the first hook 130, in the illustrated first position, is supported on a first projection 123 of the second section. The second latch 138 is in the release position and is connected to the transfer element 160. A third projection 125 connects the two halves 120a and 120b of the second section 120 and provides the second section 120 with greater stability. The third projection 125 of the second section 120, together with a release 166 of the transfer element 160, also forms a second guide 102 as a secondary effect.

[0120] In the enlargement of the first latch 200 and sections of the transfer element 160 shown below, further details can be seen: the first latch 200 has a wedge-shaped locking portion 201. As shown, a first engaging portion 202 can interact with a latch blocking portion 162 to prevent the first latch 200 from being transferred from an extended position shown, in which the locking portion 201 engages with one of the recesses 111 of the first portion 110, to a retracted position. Opposite the latch blocking portion 162, the transfer element 160 has a support portion 165 with which it can be supported on the second portion 120.

[0121] A second action section 203 of the first latch 200 is located opposite a drive section 161 of the transfer element 160 and is intended to cooperate with it to move the first latch 200 from the extended position to the retracted position. However, in the illustrated position of the transfer element 160, the drive section 161 and the second action section 203 are spaced apart from each other.

[0122] Between the first engagement section 202 and the second engagement section 203 lies a free space 204, in which the latch blocking section 162 is accommodated when the transfer element 160 is in a drive position. On the side of the locking section 201 facing the proximal end 121, there is a third engagement section 208, which is designed to cooperate with an edge of the recess 111, with which the first latch 200 engages, in order to urge the first latch 200 toward the retracted position.

[0123] The first latch 200 is pivotable about a second axis 206, on which it is mounted by a second bearing section 207. Two third springs 205, one of which is a leg spring and the other a tension spring, bias the first latch 200 toward the extended position. The third spring 205, designed as a leg spring, rests at one end on the first latch 200 and at the other end on a fourth projection 126 of the second section 120.

[0124] The third spring 205, designed as a tension spring, rests at one end on the first latch 200 and at the other end on the second section 120. It can be seen that the support point of the third spring 205, designed as a tension spring, is thinner than the rest of the first latch 200. In the extended position shown, the first latch 200 rests on the fourth projection 126.

[0125] Fig. 11 again shows the second section 120 of the telescopic system 100 according to the invention. A first hook 130 with a locking section 135 is arranged at the distal end 122, wherein the first hook 130 is rotatably mounted about a first axis 132 by a first bearing section 133. A first / second spring 131 is attached with a first end 131a to the first hook 130, specifically approximately above the first bearing section 133, and with a second end 131b to an arm of the L-shaped second latch 138.

[0126] The second latch 138 is movable together with the transfer element 160, which has, among other things, a drive section 161 and a detection section 164. In the illustrated adjustment position of the telescopic system 100 according to the invention, the first hook 130 is in its first position (open), the second latch 138 is in its release position, the transfer element 160 is in the drive position, the first latch 200 is in the retracted position (according to the first configuration), and the actuating element 230 (not shown) is actuated. The child seat 10 connected to the telescopic system 100 or the base for a child seat 11 connected to the telescopic system 100 are thus not attached to the motor vehicle seat 1, and the length of the telescopic system 100 can be freely adjusted between a minimum extension and a maximum extension. A sensor 180 is shown schematically.

[0127] Fig. 12 shows the same elements as Fig. 11, but the telescopic system 100 according to the invention is now in an installation position. Furthermore, the first hook 130 is in the first position (open) and the second latch 138 is in the release position. However, the transfer element 160 is now in a second non-drive position and the first latch 200 is in the extended position (according to the third configuration). The actuating element 230 (not shown) is not actuated. The telescopic system 100 is not attached to the motor vehicle seat 1 and the length of the telescopic system 100 cannot be changed because the latch blocking section 162 of the transfer element 160 blocks the first latch 200 at the first engaging section 201 and holds it in the extended position.

[0128] Fig. 13 shows the elements already shown in Figs. 11 and 12, but the telescopic system 100 according to the invention is now in a locking position. The first hook 130 is now in the second position, the second latch 138 is in a locking position, and the transfer element 160 is in a first non-drive position. The first latch 200 is in the extended position (according to the second configuration), and the actuating element 230 (not shown) is not actuated. The telescopic system 100 and, if applicable, the child seat 10 connected thereto or the base for a child seat 11 connected thereto are fastened to the motor vehicle seat 1, and the length of the telescopic system 100 cannot be increased but only reduced if a force acts on the first section 110 or on the child seat 10 or the base for a child seat 11, pressing the first section 110 and second section 120 towards each other.It can be seen that the sensor 180 is no longer opposite the detection section 164, so that a distinction can be made between the locking position and the release position of the second latch 138 (and thus between the first and second positions of the first hook 130).

[0129] Figs. 14-18 show an alternative embodiment of the telescope system 100 according to the invention. The design essentially corresponds to that previously illustrated, but the transfer element 160 here has a deblocking section 167 that is movable in the longitudinal direction relative to the other components of the transfer element 160 and is preloaded by a fifth spring 168 toward the proximal end 121 of the second section 120. The illustrated embodiment addresses the problem that it is at least theoretically conceivable that the first latch 200 comes to a stop exactly between two recesses 111 of the first section 110 and can then block the entire telescope system 100. It should be noted at this point that in Figs. 14-18, the first / second spring 131 and the fifth spring 168 are only illustrated schematically.

[0130] Fig. 15 shows, as in Fig. 14, the telescopic system 100. Here, the unblocking section 167 and the fifth spring 168 do not yet have any effect, in comparison to the previously shown embodiment (Fig. 1-13).

[0131] In Fig. 16, the second latch 138 is still in its locking position relative to the first hook 130. Due to a force pushing the first section 110 and the second section 120 towards each other, the first latch 200 has been raised by the interaction of the edge of one of the recesses 111 and the third engagement section 208. If, as shown in Fig. 17, the first latch 200 comes to a stop exactly between two recesses 111 of the first section 110 and a user attempts to move the second latch 138 from its locking position to the release position by actuating the (not shown) actuating element 230 in order to enable the first hook 130 to switch from the second position to the first position, the latch blocking section 162 can run against the first engagement section 202.Now, as shown in Figure 18, the transfer element 160 (with the exception of the unblocking section 167) can be urged against the force of the fifth spring 168 in the direction of the proximal end 121, so that the second latch 138 can still reach the release position.

[0132] Figures 19a to 19c again show very schematically the basic interaction of parts of the telescopic system 100 according to the invention, namely the second section 120, the first hook 130, the transfer element 160 with the second latch 138 and the first latch 200. Figure 19a shows the adjustment position, Figure 19b shows the installation position, and Figure 19c shows the locking position.

[0133] 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.

[0134] 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 / elements" should preferably designate a coherent structure, 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. Reference symbols

[0135] 1 motor vehicle seat

[0136] 2 vehicle seat backrest

[0137] 3 Motor vehicle seat surface

[0138] 4 brackets

[0139] 10 child seat

[0140] 11 Base for a child seat

[0141] 12 Bottom

[0142] 13 Back

[0143] 100 telescope system

[0144] 101 first tour

[0145] 102 second lead

[0146] 110 first section

[0147] 111 Recess

[0148] 112 (side) guide slot

[0149] 120 second section

[0150] 120a, 120b first and second half

[0151] 120c end cap

[0152] 121 proximal end

[0153] 122 distal end

[0154] 123 first lead

[0155] 124 second lead

[0156] 125 third lead

[0157] 126 fourth lead

[0158] 127 slot

[0159] 130 first hook

[0160] 131 first / second spring

[0161] 131a, 131b first and second end of the first / second spring

[0162] 132 first axle

[0163] 133 first camp section

[0164] 134 Operating section

[0165] 135 Locking section

[0166] 135a, 135b legs

[0167] 136 intervention section

[0168] 137 Hook blocking section

[0169] 138 second bolt 139 locking section

[0170] 140 first section of the second block

[0171] 160 transfer element

[0172] 161 drive section

[0173] 162 bolt blocking section

[0174] 163 second section of the transfer element

[0175] 164 Detection section

[0176] 165 support section

[0177] 166 Exemption

[0178] 167 Deblocking section

[0179] 168 fifth spring

[0180] 180 sensors

[0181] 200 first bars

[0182] 201 restricted section

[0183] 202 first impact section

[0184] 203 second impact section

[0185] 204 open space

[0186] 205 third spring

[0187] 206 second axle

[0188] 207 second camp section

[0189] 208 third impact section

[0190] 230 Actuator

[0191] 231 fixed section

[0192] 232 movable section

[0193] 233 Holding device

[0194] 234 Release operation

[0195] 235 fourth spring

[0196] 236 first pin

[0197] 237 second pin

Claims

Claims Telescopic system (100) for fastening a child seat (10) and / or a base for a child seat (11) to a motor vehicle seat (1), wherein the telescopic system (100) comprises a first section (110) and a second section (120), wherein the first and second sections are displaceable relative to one another in a longitudinal direction for adjusting a length of the telescopic system (100), wherein a first latch (200) is mounted in or on the second section, wherein the telescopic system is capable of being brought into at least a first, second and third configuration, wherein in the first configuration the adjustment of the length of the telescopic system (100) is enabled,In the second configuration, the adjustment of the length of the telescopic system (100) is limited compared to the first configuration, and in the third configuration, the adjustment of the length of the telescopic system (100) is further limited compared to the second configuration or is not possible. Telescopic system (100) according to claim 1, characterized in that the first section (110) is the child seat (10) or the base for the child seat (11), optionally detachably, fastened or attachable, and / or is formed integrally with the child seat (10) or the base for the child seat (11) at least in sections, wherein the second section (120) is preferably provided for detachable fastening to a motor vehicle seat (1) and has a proximal end (121) and a distal end (122), wherein in the region of the distal end (122) of the second section (120) further preferably a first hook (130) is provided, which is suitable for attaching a bracket (4) provided on the vehicle, in particular an Isofix anchorage or an anchorage according to standard ISO 13216 or.UN ECE R 145, to engage around in order to couple the telescopic system (100) to the motor vehicle seat (1), wherein the first hook (130) is switchable between a first position in which it does not couple the telescopic system (100) to the motor vehicle seat (1), and a second position in which it couples the telescopic system (100) to the motor vehicle seat (1). Telescopic system (100) according to one of the preceding claims, characterized in that the second section (120) is at least 4 cm, preferably at least 8 cm long and / or at most 40 cm, preferably at most 30 cm, long, and / or the first section (110) is at most 40 cm long and / or at least half as long as the second section (120).Telescopic system (100) according to one of the preceding claims, characterized in that the minimum length of the telescopic system (100) and the maximum length of the telescopic system (100) differ by at least 4 cm, preferably at least 8 cm and / or at most 30 cm, preferably at most 20 cm. Telescopic system (100) according to one of the preceding claims, characterized in that a second latch (138) is provided in and / or on the second section (120), which is adjustable between a locking position in which the second latch (138) holds the first hook (130) in its second position and / or a release position in which the second latch (138) does not hold the first hook (130) in its second position. Telescopic system (100) according to one of the preceding claims, characterized in that the first section (110) has a plurality of at least two, preferably 4 to 15, recesses (111) spaced apart in the longitudinal direction. Telescopic system (100) according to one of the preceding claims, characterized in that the first latch (200) has a locking section (201) that can be selectively engaged or disengaged with a counterstructure, in particular with one of the recesses (111) of the immediately preceding claim, of the first section (110), in order to adjust the second section (120) relative to the first section (110) with regard to the length of the telescopic system (100) in the longitudinal direction.wherein the locking section (201) can preferably assume at least one retracted position according to the first configuration and / or wherein the locking section (201) can assume an extended position according to the second and / or the third configuration, and / or has a first engagement section (202) to be held in the extended position according to the third configuration and / or has a second engagement section (203) to be held in the retracted position according to the first configuration and / or has a third engagement section (208), in particular as a component of the locking section (201), which, according to the second configuration, is suitable for being contacted by an edge of a counter-structure, in particular a recess (111) of the first section (110), when a force urges the first and second sections (120) towards each other in order to reduce the length of the telescopic system (100),wherein the third action section (208) is preferably oblique with respect to the longitudinal direction, so that the first latch (200) is urged towards the retracted position by the contact of the third action section (208) and the associated force. Telescopic system (100) according to one of the preceding claims, characterized in that a transfer element (160) is provided, which is arranged to be movable, preferably displaceable, in particular longitudinally displaceable, between at least a first non-drive position, a second non-drive position and a drive position in and / or on the second section (120), wherein the transfer element (160) has a drive section (161) which is suitable for selectively cooperating with the second action section (203) of the first bolt (200) in order to transfer the latter from the extended position into the retracted position, and / or has a bolt blocking section (162) which is suitable for selectively cooperating with the first action section (202) of the first bolt (200) in order to prevent the latter from being transferred from the extended position into the retracted position and / or is operatively connected to the second bolt (138). is,such that a movement of the transfer element (160), optionally by means of an actuating element (230), can release the second latch (138) for switching between the release position and / or the locking position. Telescopic system (100) according to one of the preceding claims, characterized in that a first pin (236) is connected, in particular fixedly, to the second section (120) and / or a second pin (237) is connected, in particular fixedly, to the transfer element (160), wherein the first and second pins (237) are provided for connection to an actuating element (230), wherein the first section (110) preferably has a lateral guide slot (112) extending in the longitudinal direction, preferably over at least 50% of the length of the first section (110), wherein both the first pin (236) and the second pin (237) preferably extend through the first section (110). Telescopic system (100) according to one of the preceding claims, characterized in that the second section (120) has an elongated hole (127) which overlaps with a section of the lateral guide slot (112) of the first section (110) and allows a movement of the second pin (237) in the longitudinal direction towards the first Pin (236) or leads away from it. Telescopic system (100) according to one of the preceding claims, characterized in that an actuating element (230) is provided, in particular for, preferably manual actuation by a user, wherein a fixed section (231) of the actuating element (230) is connected, in particular fixedly, to the second section (120) via a first pin (236), and a movable section (232) of the actuating element (230) is operatively connected to the transfer element (160) via a second pin (237) and is movable relative to the fixed section (231) and can be blocked by a holding device (233), in particular a third latch, wherein a release actuation (234) is provided to release the holding device (233).Telescopic system (100) according to one of the preceding claims, characterized in that it can be brought into the following positions: an adjustment position in which the first hook (130) is in the first position, the second latch (138) is in the release position and the transfer element (160) is in the drive position, wherein the first latch (200) is in the retracted position according to the first configuration and the actuating element (230) is actuated, so that the telescopic system (100) and thus the child seat (10) or the base for a child seat (11) is not fastened to the motor vehicle seat (1), so that the length of the telescopic system (100) is adjustable, and / or a locking position in which the first hook (130) is in the second position, the second latch (138) is in the locking position and the. Transfer element (160) are in the first non-drive position, wherein the first latch (200) according to the second configuration is in the extended position and the actuating element (230) is not actuated, so that the telescopic system (100) and thus the child seat (10) or the base for a child seat (11) is fastened to the motor vehicle seat (1), wherein the length of the telescopic system (100) is exclusively reducible, and / or an installation position in which the first hook (130) is in the first position, the second latch (138) is in the release position and the transfer element (160) is in the second non-drive position, wherein the first latch (200) according to the third configuration is in the extended position and the actuating element (230) is not actuated, so that the telescopic system (100) and thus the child seat (10) orthe base for a child seat (11) is not fastened to the motor vehicle seat (1), so that the length of the telescopic system (100) can be changed to a further limited extent compared to the second configuration or is not changeable, and / or an intermediate position when the telescopic system (100) is shortened from the locking position and the first bolt (200) has not yet reached the next recess (111), wherein the length of the telescopic system (100) can be slightly increased, in particular until the first bolt (200) engages in the previous recess (111), when the first section (110) and the second section (120) are pulled apart. Child seat (10) or base for a child seat (11), comprising two telescopic systems (100) arranged next to one another according to one of the preceding claims, in particular for fastening the child seat (10) or the base for a child seat (11) on one. Motor vehicle seat (1), in particular compatible with an Isofix anchorage or an anchorage according to standard ISO 13216 or UN ECE R 145. Method for attaching a child seat (10) or a base for a child seat (11), according to the immediately preceding claim, to a motor vehicle seat (1), wherein first (110) and second Section (120) for adjusting the length of the telescopic system (100) can be displaced relative to one another in the longitudinal direction, wherein the telescopic system (100) is selectively moved into the first, third and / or second configuration, preferably into the first, third and second configuration. Method for releasing a child seat (10) or a base for a child seat (11) according to claim 13 from a motor vehicle seat (1), wherein the telescopic system (100) can be moved from the second configuration into the third configuration or from the second configuration into the first configuration.

Images