Fastening system for child seat

Abstract

The invention relates to a telescopic system (100) for fixing a child seat (10) and / or a base (11) for a child seat to a motor vehicle seat (1), the telescopic system (100) comprising a first section (110) and a second section (120), the first section and the second section being movable relative to each other in a longitudinal direction in order to adjust the length of the telescopic system (100), a first locking means (200) is arranged in or on the second section, and wherein the telescopic system can be brought at least into a first configuration, in which adjustment of the length of the telescopic system (100) can be achieved, and into a second configuration, in which adjustment of the length of the telescopic system (100) can be achieved as compared to the first configuration, and into a third configuration, in which the length of the telescopic system (100) can be adjusted as compared to the first configuration. In the first configuration, the adjustment of the length of the telescopic system (100) can be carried out in a limited manner, and in the second configuration, the adjustment of the length of the telescopic system (100) can be carried out in a further limited manner or cannot be carried out in comparison with the second configuration.

Description

Technical Field

[0001] The present invention relates to a telescopic system for fixing a child seat and / or a base for a child seat to a vehicle seat, preferably a motor vehicle seat. Background Art

[0002] A "child seat" is understood by professionals to be a restraint system for children, which is arranged for transporting children in a vehicle, preferably a motor vehicle.

[0003] In this regard, it should be noted that within the scope of the present invention, the term "child seat" should be understood as a superordinate concept for (classical) child seats, baby shells, booster seats, seat boosters, etc. Therefore, within the scope of the present invention, features provided for a child seat can in principle also be applied to a baby shell, and vice versa, unless otherwise stated. The same applies to the concept of "child", which should also be understood as a superordinate concept for children, infants and toddlers.

[0004] It should be noted that within the scope of the present invention, the term "child seat" should be understood as a superordinate concept for (classical) child seats, baby shells, booster seats, seat boosters, etc. For example, the child seat in the present invention can be a (classical) child seat (for older children, such as Group I / II and / or III child seats), which has a backrest structurally separated from the seating area, and the inclination of the backrest can be changed relative to the seating area if possible. Such a structural separation can be formed, for example, by a bend or the like. However, generally speaking (when not otherwise specified in a specific case), the child seat should always be understood as an abbreviation for "child seat, such as baby shell, booster seat and / or seat booster", or within the scope of the present invention, features provided for a (classical) child seat can in principle also be applied to baby shells, booster seats and / or seat boosters, and vice versa (as long as the opposite is not mentioned). The same applies to the concept of "child", which should also be understood as a superordinate concept for children, infants and toddlers. The so-called "baby shell" generally (only) includes a one-piece shell for accommodating an infant or a child, and can include its own seat belt system, possibly including a head support and possibly including other components. Instead of a (structurally separated) backrest, such a "baby shell" has a back section adjacent to the "seating area", in which the child's buttocks can be accommodated.

[0005] A "base for a child seat" is particularly understood by professionals to be a base on which a child seat can be fixed, either removably or non-removably.

[0006] Child seats, baby capsules, booster seats, etc. that can be installed on motor vehicle seats have been known for a long time. Such child seats, baby capsules, booster seats, etc. serve as seats for children, infants, and toddlers, and in particular, provide enhanced protection for them in the event of an accident and / or emergency braking. Such child seats can be fixed using the vehicle's seat belt system or by means of Isofix anchors. This fixation locks the child seat to the motor vehicle seat in the event of an accident, so that the child seat, especially in the event of a frontal collision (impact) and / or emergency braking, is held on the motor vehicle seat and does not fly forward.

[0007] Since such child seats often have to be replaced or installed and removed between different vehicles, especially motor vehicles, it is particularly important that the detachable anchoring of the child seat enables user-friendly operation. However, in addition, such simplified operation should not come at the expense of the safety of children in road traffic or in the event of an accident.

[0008] Therefore, the fixation of the child seat on the motor vehicle seat must be as stable as possible. However, at the same time, it is also desirable that this fixation allows for a certain degree of adjustability in order to be able to optimally adapt to different motor vehicle seats.

[0009] For example, an adjustable telescopic system for fixing a child restraint system to a motor vehicle seat is known from EP3600954B1. However, the fixation system disclosed there, although consisting of a large number of different individual components, is considered to be in need of improvement in terms of manufacturing costs and error-proneness in use. Summary of the Invention

[0010] Therefore, the object of the present invention is to provide a telescopic system for fixing a child seat and / or a base for a child seat to a motor vehicle seat, which meets the above requirements regarding stability, user-friendliness, safety, and general availability in the most cost-effective and error-free manner.

[0011] This object is solved in particular by the features of claim 1.

[0012] In particular, this task is solved by a telescopic system for fixing 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 section and the second section are movable relative to each other (in the longitudinal direction) to adjust the length of the telescopic system (wherein the sections are guided on one another by at least one first guide, wherein preferably one of the first section and / or the second section is guided directly or indirectly in the longitudinal direction on the other of the first section and the second section by at least one first guide), wherein a first locking member is arranged in or on the second section, wherein the telescopic system can be brought into at least a first configuration, a second configuration and a third configuration, wherein in the first configuration the length of the telescopic system can be adjusted, in the second configuration, compared to the first configuration, the adjustment of the length of the telescopic system can be restricted, and in the third configuration, compared to the second configuration, the adjustment of the length of the telescopic system can be further restricted or (at least substantially) not carried out.

[0013] One idea of the present invention is that, contrary to the above-mentioned prior art, the length of the telescopic system is advantageously adjusted according to the above-mentioned configurations using only one locking member, i.e. the first locking member. Thereby, the telescopic system of the present invention is characterized by structural simplicity, while having no functional limitations compared to the prior art (using two locking members).

[0014] Unless otherwise expressly stated, terms such as "first", "second", etc. (e.g. first hook or second spring) are used to distinguish different elements from one another. Thus, the existence of a first spring or a second spring does not necessarily imply the existence of more than one spring.

[0015] The fact that the first section and the second section are movable relative to each other should in particular be understood as follows: the first section and the second section can move relative to each other (in particular translationally, preferably in the longitudinal direction).

[0016] Furthermore, the telescopic system can have a transmission element (described in more detail below) which is adapted to drive the first locking member and transfer the first locking member from its extended position to its retracted position.

[0017] Preferably, the first section is fixed or fixable, if possible detachably, to the child seat or the base for a child seat, and / or is integrally formed with the child seat or the base for a child seat at least in part, wherein the second section is preferably provided for detachably fixing 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, it is further preferably provided with at least one or exactly one first hook, which is adapted to surround a vehicle-side bow member, in particular an Isofix anchor or an anchor conforming to ISO 13216 standard or UN ECE R 145 standard, in order to couple the telescopic system to the motor vehicle seat, wherein the first hook can be switched between a first position, in which the first hook does not couple the telescopic system to the motor vehicle seat, and a second position, in which the first hook couples the telescopic system to the motor vehicle seat.

[0018] The motor vehicle seat can have at least one, preferably exactly two, bow members in the transition region between the seat surface and the backrest (at least approximately), which can be surrounded (respectively) by the first hooks of the telescopic system. The child seat or the base for a child seat can have a lower side, which is provided for placement on the seat surface of the motor vehicle seat. The child seat or the base for a child seat can have a rear side, which is provided for facing the backrest of the motor vehicle seat and, if possible, for abutting against the backrest.

[0019] The section of the telescopic system can be flush with the lower side and / or the rear side of the child seat or the base for a child seat.

[0020] In an embodiment, the first section and / or the second section (at least substantially) has a cross-section that is at least in part square and / or rectangular.

[0021] The first section and / or the second section is preferably at least substantially profiled (or constructed as a profile), and if possible is constructed as hollow and / or tubular.

[0022] According to an embodiment, the first section and / or the second section has a height and / or a diameter (the largest when observed in the longitudinal extension), which is less than or equal to 5 cm, preferably 2 cm to 3.5 cm.

[0023] According to an embodiment, the first section and / or the second section has a width (the largest when observed in the longitudinal extension), which is less than or equal to 3 cm, preferably 1.0 cm to 2.0 cm.

[0024] The first section can surround or enclose the second section in part.

[0025] 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 long, preferably at least 4 cm long.

[0026] The second section is preferably at least 4 cm long, more preferably at least 8 cm long, and / or at most 40 cm long, preferably at most 30 cm long (e.g., 20 cm long).

[0027] In an embodiment, the second section has a number of preferably inwardly directed protrusions. Each of the protrusions can be constructed over the entire width of the second section (transverse to the longitudinal direction, especially in the left - right direction) or over a part of the width of the second section. Each of the protrusions can be constructed, for example, as a bulge or as a peg.

[0028] The second section preferably has a first protrusion for supporting the first hook in the first position of the first hook.

[0029] Furthermore, the second section preferably has a second protrusion for guiding the locking element, possibly a plurality of second protrusions, and / or at least one third protrusion for guiding the transmission element. At least one optional fourth protrusion of the second section can be used for supporting the first locking element in the extended position of the first locking element.

[0030] The first hook is preferably pre - tensioned towards its first position, especially by a first spring. Especially when the first hook is pre - tensioned towards the first position, a second locking element (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 in position relative to the second section. In addition, the first hook can have a first shaft section or a first support section. The first hook can also have a locking section that is adapted to surround a vehicle - side bow - shaped member, and / or is constructed in a C - shape or a U - shape.

[0031] The locking section can especially have two legs opposite each other, where one of the legs can be adjacent to the operating section of the first hook. The first spring can be fixed, especially held and / or supported, at the first axis on the first hook, and / or the first spring can be constructed as a helical torsion spring.

[0032] Alternatively, the first spring can be fixed, especially held and / or supported, on the first hook spaced apart from the first axis, and / or the first spring can be constructed as a tension spring. In principle, other types of springs are also conceivable.

[0033] The first (functional) end of the first spring can be supported on the first hook. The second end of the first spring can be supported on the second section. The first spring and the second spring (see below) can also be the same and consist of a single (first / second) spring construction that simultaneously pre-tensions the first hook towards the first position and pre-tensions the second locking member towards the locking position (see below). This is preferably achieved in that the first end of the first / second spring is supported on the first hook and the second end of the first / second spring is supported on the second locking member (or, if possible, on a transmission element).

[0034] Furthermore, a force acting on the operating section in the longitudinal direction (e.g., due to pressing against an arcuate member on the vehicle side), i.e., acting on the operating section from the distal end of the second section towards the proximal end of the second section, can drive the first hook to transfer from the first position to the second position.

[0035] Preferably, the telescopic system can be fully recessed into the child seat or the base for the child seat. The first section can be mounted on the child seat or the base for the child seat in such a way that it is fully recessed, or at least partially ends flush with the child seat or the base for the child seat. The second section can in turn be adjusted relative to the first section to at least one position such that it is also fully recessed, or at least partially ends flush with the child seat or the base for the child seat.

[0036] 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.

[0037] The maximum protrusion of the telescopic system beyond the child seat or the base of the child seat can be at least 4 cm, preferably at least 8 cm, and / or at most 30 cm, preferably at most 20 cm.

[0038] Preferably, a second locking member is provided in and / or on the second section, in particular the second locking member described above, which can be displaced between a locking position (in particular the locking position described above) and / or a release position, in which locking position the second locking member holds the first hook in its second position and in which release position the second locking member does not hold the first hook in its second position.

[0039] The second locking member can be pre-tensioned towards the locking position, in particular by means of a second spring, in particular the second spring described above, in particular a tension spring. The first end of the second spring can be supported on the second locking member. The second end of the second spring can be supported on the second section. The first hook and the second locking member can be constructed and arranged such that when the first hook is in its first position, the first hook holds the second locking member in the released position by means of the hook blocking section, and furthermore, the transfer of the first hook to its second position (e.g. by operating the operating section) allows the second locking member to transfer to its locking position, in particular driven by the second spring or the first / second spring.

[0040] The first hook can have an engagement section into which the second locking member engages with a locking section when the first hook is in its second position and the second locking member is in its locking position. The second locking member can have a first abutment section for abutting against a transmission element (see below). The second locking member can also be L-shaped, in particular such that the end of one arm of the L-shape forms the locking section, and / or the other arm of the L-shape (in whole or in part) forms the abutment section. The second locking member can be made of metal (at least 50 wt% or at least 80 wt%), in particular steel. The second locking member can be switchable between the locking position and the released position by translation (alternatively: rotation or with a share of translation and rotation).

[0041] 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) voids spaced apart from each other in the longitudinal direction, each void being adapted to receive the locking section of the first locking member. The distance between two voids can be in the range of 1 cm to 2 cm here, for example 15 mm, and / or at least 3% and / or at most 50% of the maximum protrusion. These voids can in particular be through-holes.

[0042] Preferably, the first locking member of the telescopic system has a locking section which can selectively engage or disengage with a mating structure of the first section, in particular with one of the voids of the first section, in order to adjust the second section relative to the first section in terms of the length of the telescopic system (in the longitudinal direction), wherein the locking section can preferably occupy at least one retracted position (resulting from the retracted position of the first locking member) corresponding to a first configuration, and / or the locking section can occupy an extended position (resulting from the extended position of the first locking member) corresponding to a second and / or third configuration. The locking section is in particular at least partially wedge-shaped.

[0043] Additionally or alternatively, the first locking element preferably has a first effective section in order to be held in the extended position according to the third configuration. The first effective section can be adapted to cooperate with the locking stop section of the transmission element (see below) and, when the transmission element is in the second non-driven position (see below), hold the first locking element in the extended position.

[0044] Additionally or alternatively, the first locking element preferably has a second effective section in order to be held in the retracted position according to the first configuration. The second effective section can be adapted to cooperate with the drive section of the transmission element such that, when the transmission element is transferred into the drive position (see below), the first locking element is driven into the retracted position.

[0045] A free space can be provided adjacent to the first effective section (in particular as a clearance between the first effective section and the second effective section) such that, when the transmission element is in the drive position, the locking stop section faces this free space, so that the locking stop section of the transmission element (see below) does not prevent the first locking element from switching into the retracted position.

[0046] The first locking element can be pre-tensioned towards the extended position, in particular by means of at least one third spring. The first locking element can also be rotatable about a second axis which is preferably fixed relative to the second section position and can have a second shaft section or a second bearing section for this purpose. The third spring (or at least one of the third springs, if there are possibly multiple third springs) can be fixed, in particular held and / or supported, on the first locking element at the second axis and / or can be configured as a helical torsion spring.

[0047] Alternatively or additionally (in particular when there are multiple third springs), the third spring (or at least one of the third springs, if there are possibly multiple third springs) can also be fixed, in particular held and / or supported, on the first locking element at a distance from the second axis and / or can be configured as a tension spring. Other types of springs are also conceivable, in particular two third springs (redundancy) can also be provided.

[0048] Additionally or alternatively, the first locking element preferably has a third effective section, in particular as part of a locking section, which can be adapted, according to the second configuration, to come into contact with the edge of a mating structure (corresponding, in particular the above-mentioned) - in particular a clearance in the first section - when a force presses the first section and the second section against each other to reduce the length of the telescopic system, wherein the third effective section is preferably inclined (oblique) relative to the longitudinal direction, so that the first locking element is displaced in the direction of the retracted position by the contact of the third effective section and the resulting force.

[0049] In the extended position of the first locking element, the side of the locking section opposite the third acting 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 locking element, the side of the locking section that forms the third acting section can enclose an angle of 35° to 55°, preferably 45°, with the longitudinal direction.

[0050] Preferably, the telescopic system has - in particular as already described above - a transmission element that is movably, preferably displaceably, in particular longitudinally displaceably (with or without a rotational component), between at least one first non-driven position, a second non-driven position, and a driven position, arranged in and / or on the second section.

[0051] The transmission element preferably has a drive section that is adapted to selectively cooperate with the second acting section of the first locking element in order to transfer the first locking element from the extended position into the retracted position. The drive section can be formed by a surface that is at least substantially constructed such that the longitudinal direction forms its surface normal.

[0052] Additionally or alternatively, the transmission element preferably has a locking blocking section that is adapted to selectively cooperate with the first acting section of the first locking element to prevent the first locking element from being transferred from the extended position into the retracted position. The locking blocking section can have a blocking surface that is straight in the longitudinal direction or inclined with respect to the longitudinal direction by at least 5° and / or at most 30°, preferably at most 20°. If the locking blocking section is inclined, it is preferably such that the transfer of the transmission element from the second non-driven position (in which the locking blocking section blocks the transfer of the first locking element into the retracted position) to the first non-driven position (which follows the locking position of the second locking element) is made easier, or is possible even when a force displaces the first locking element in the direction of the retracted position.

[0053] Preferably, the first locking element and the transmission element are coordinated such that a (non-dominant) share of the force for transferring the first locking element from the extended position into the retracted position can be transmitted through the first acting section onto the locking blocking section in order to displace the transmission element from the second non-driven position into the first non-driven position.

[0054] Preferably, the first locking element is integrally constructed, if possible monolithically.

[0055] The transmission element can be pre-tensioned, in particular by means of a second spring, towards a first non-driven position in which the locking blocking section does not prevent the first locking element from being transferred from the extended position into the retracted position, and in which the drive section does not cooperate with the first locking element to transfer the first locking element from the extended position into the retracted position. In the first non-driven position, the adjustment of the length of the telescopic system can be permitted or effected in a restricted manner. The transmission element and the second locking element can be constructed and arranged such that the second locking element is in the locked position when the transmission element is in the first non-driven position. The transmission element includes, in one embodiment, a second abutment section for abutting against a first abutment section of the second locking element.

[0056] Additionally or alternatively, the transmission element is preferably operatively connected to the second locking element such that the movement of the transmission element - possibly with the aid of an operating element (of the telescopic system) - releases or can release the second locking element to switch between a released position and / or a locked position. In particular, the transmission element can transfer the second locking element from the locked position into the released position by means of the movement of the operating element.

[0057] The transmission element can be made of plastic (at least 50 wt% or at least 80 wt%), in particular as an injection molded part. The second locking element and the transmission element can be firmly connected to each other, for example, by fixing devices, and / or a section of the second locking element - in particular the first abutment section - can be injection molded.

[0058] If, according to an embodiment, the second locking element is made of metal, in particular steel (at least 50 wt% or at least 80 wt%), and the transmission element is made of plastic (at least 50 wt% or at least 80 wt%), high stability can be achieved in the relevant areas on the one hand, and weight and / or costs can be saved on the other hand.

[0059] In an alternative embodiment, the second locking element and the transmission element can be integrally constructed.

[0060] Generally, in particular, the first hook, the first locking element and / or the second locking element can be made of metal, in particular steel (at least 50 wt% or at least 80 wt%).

[0061] The transmission element can have a second guide between the second section and the transmission element, specifically, for example, by means of a recess, possibly a guide groove or a guide slot, and a third protrusion, possibly a guide pin or a guide bolt.

[0062] In another embodiment, the transfer element has a blocking release section that can move relative to other components of the transfer element in the longitudinal direction, and this blocking release section is pre-tensioned towards the proximal end of the second section by a fifth spring. This embodiment solves the problem that it is at least theoretically conceivable that the first locking member exactly stops between the two cutouts of the first section and may then block the entire telescopic system. That is, when the first locking member exactly stops between the two cutouts of the first section and the user attempts to transfer the second locking member from its locked position to the release position by operating the operating element so that the first hook can be transferred from the second position to the first position, the locking blocking section of the transfer element may abut against the first acting section of the first locking member. However, according to this embodiment, in addition to the blocking release section, the transfer element can be displaced towards the proximal end against the force of the fifth spring, so that the second locking member can still reach the release position and the first hook can reach the first position, thereby preventing the telescopic system from being blocked.

[0063] In another embodiment, the transfer element may have a detection section that is adapted to detect, for example, by a sensor to determine the position of the transfer element. Therefore, a sensor may be provided in the second section, for example, which is adapted to preferably detect the position of the transfer element. In particular, it is detected whether the transfer element is in the first non-driven position and whether the first hook is in its second position (where the telescopic system is coupled to a vehicle seat), so that it can be recognized whether a child seat connected to the telescopic system or a base for a child seat connected to the telescopic system is in use. The detection section and the sensor are preferably adjacent to each other. In addition, the detection section and the sensor may preferably be arranged between the first locking member and the proximal end of the second section, or they may be arranged between the first locking member and the first hook.

[0064] The transfer element is preferably operatively connected to the operating element (of the telescopic system) for operation by the user.

[0065] Preferably, the transfer element has support sections that directly abut against the second section to support the transfer element on the second section and, if possible, enable the transfer element to slide along the second section. The support sections can in particular be configured as protrusions, and preferably support sections can be provided at the height of the locking blocking section relative to the blocking surface.

[0066] 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 transmission element, wherein the first pin and the second pin are preferably arranged for connection to the operating element, wherein the first section preferably has a lateral guide slit which extends in the longitudinal direction, preferably over at least 50% of the length of the first section, and wherein further preferably both the first pin and the second pin extend through the lateral guide slit. The minimum and maximum lengths of the telescopic system can be determined by means of the lateral guide slit.

[0067] Preferably, the second section has an oblong hole which overlaps a section of the lateral guide slit of the first section and allows the second pin to move in the longitudinal direction towards or away from the first pin.

[0068] Preferably, an operating element is provided, in particular the operating element described above, which is in particular for (preferably indirect or direct) manual operation by the user (for adjustment to the first configuration, the second configuration and the third configuration). The fixed section of the operating element is preferably connected, in particular firmly, to the second section by means of the first pin, and the movable section of the operating element is preferably operatively connected to the transmission element by means of the second pin and / or is movable relative to the fixed section. Further preferably, the operating element or the movable section of the same operating element can be blocked by a holding device, in particular a third locking member, and a release operation part can be provided in order to release the holding device. The operating element, in particular its release operation part, can comprise at least one button and / or at least one key and / or at least one slide member and / or at least one operating lever.

[0069] Preferably, the movable section of the operating element is movable relative to the fixed section (and thus also relative to the second section), in particular against the force of a fourth spring.

[0070] The telescopic system preferably has an installation position (see below), wherein the first hook is in the first position, the second locking member is in the released position (held by the hook blocking section of the first hook), the transmission element is in the second non-driven position, and the first locking member is in the extended position according to the third configuration, wherein the release operation part (of the operating element) is not operated by the user.

[0071] In the case where, according to a preferred embodiment, the user presses the first hook, in particular its operating section, firmly against the bow-shaped part on the vehicle side starting from the installation position (where the release operating part has not been operated yet), the second locking part is transferred into the locking position, and the transmission element is transferred from the second non-driven position into the first non-driven position, wherein the first locking part is still in the extended position according to the second configuration, and the first hook is transferred into the second position (by the operation of the operating section by the bow-shaped part on the vehicle side), wherein the two legs of the first hook enclose the bow-shaped part on the vehicle side, so that the telescopic system is transferred into the locking position (see below).

[0072] In the case where, according to a preferred embodiment, the user operates the release operating part starting from the locking position, in particular presses the release operating part more and more, the transmission element is first transferred from the first non-driven position back into the second non-driven position, and the second locking part is held in the release position again by the hook blocking section of the first locking part, wherein the first locking part is still in the extended position according to the third configuration, and 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 transferred back into the installation position.

[0073] In the case where, according to a preferred embodiment, the user operates the release operating part starting from the installation position, in particular presses the release operating part more and more, the transmission element is transferred from the second non-driven position into the driven position, the second locking part is still in the release position, and the first locking part 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 the adjustment position (see below).

[0074] In the case where, according to a preferred embodiment, the user no longer operates the release operating part starting from the adjustment position, in particular releases the release operating part (slowly or suddenly), the telescopic system is transferred back into the installation position.

[0075] In another embodiment, the fixed section of the operating element has through holes or slits on its outer side, and depending on the position of the movable section relative to the fixed section, color markings arranged on the movable section can be seen in the through holes or slits in order to display the current position of the first hook.

[0076] The operating element can be arranged (directly) on one of the first section and the second section, or arranged away from the first section and the second section.

[0077] The telescopic system (as a whole) can preferably be brought to the following positions:

[0078] an adjustment position, in particular the adjustment position already described above, in which the first hook is in the first position, the second locking element is in the release position and the transmission element is in the drive position, wherein the first locking element is in the retracted position according to the first configuration and the operating element is operated (in particular the user operates the release operating part, in particular (continuously) presses the release operating part and / or keeps the release operating part pressed), wherein the telescopic system and therefore the child seat or the base for the child seat are not fixed to the motor vehicle seat, so that the length of the telescopic system is (freely) adjustable (between a minimum length and a maximum length), and / or

[0079] a locking position, in particular the locking position already described above, in which the first hook is in the second position, the second locking element is in the locking position and the transmission element is in the first non-actuated position, wherein the first locking element is in the extended position according to the second configuration and the operating element is not operated (in particular the user does not operate the release operating part, in particular does not (increasingly) press the release operating part and / or keeps the release operating part pressed), so that the telescopic system and therefore the child seat or the base for a child seat are fixed to the motor vehicle seat, wherein the length of the telescopic system can only be reduced (in particular when a force that repels the first section and the second section against each other acts on the first section or the child seat or the base for a child seat), and / or

[0080] an installation position, in particular the installation position already described above, in which the first hook is in the first position, the second locking element is in the release position and the transmission element is in the second non-actuated position, wherein the first locking element is in the extended position according to the third configuration and the operating element is not operated (in particular the user does not operate the release operating part, in particular does not (increasingly) press the release operating part and / or keeps the release operating part pressed), wherein the telescopic system and therefore the child seat or the base for the child seat is not fixed to the motor vehicle seat, so that the length of the telescopic system can be further modified with respect to the second configuration or cannot be modified, and / or

[0081] - Intermediate position, when the telescopic system shortens starting from the locked position and the first locking member has not reached the next blank portion (of the first section) yet (in particular, the first hook is in the second position, the second locking member is in the locked position, the transmission element is in the first non-driven position, and the first locking member is in the retracted position; the operating element is not operated (in particular, the user preferably does not operate the release operating portion, in particular does not (increasingly) press the release operating portion and / or keep the release operating portion pressed); and the telescopic system and thus the child seat or the base for the child seat are fixed to the vehicle seat), wherein when the first section and the second section are pulled apart from each other, the length of the telescopic system can be slightly increased (for example, increased by at least 2 mm or at least 4 mm and / or increased by at most 2 cm or increased by at most 1 cm), in particular until the first locking member engages into the previous blank portion (of the first section).

[0082] According to the embodiment, the intermediate position can allow the length of the telescopic system to be reduced as in the locked position (in particular when a force that squeezes the first section and the second section against each other acts on the first section or the child seat or the base for the child seat). Since a slight movement in the other direction can be achieved in the intermediate position, it can be simply achieved that the user can cause at least one engagement with the previous blank portion, which particularly improves user-friendliness or safety.

[0083] Components made of metal, in particular stamped parts (which, for example, include the first hook and / or the first locking member and / or the second locking member) can have different thicknesses and have thin regions here in order to enable smaller holes to be punched out. The thin regions can be produced from regions of normal thickness by applying a high pressure (for example, by means of hammering).

[0084] The above task is solved in particular by a child seat or a base for a child seat, which child seat or base for a child seat includes two telescopic systems arranged side by side as described above, which telescopic systems are in particular for fixing the child seat or the base for the child seat to the vehicle seat, and which telescopic systems are in particular compatible with Isofix anchors or anchors conforming to ISO 13216 standard or UN ECE R 145 standard.

[0085] Furthermore, the above task is solved in particular by a method for fixing a child seat as described above or a base for a child seat to a motor vehicle seat, wherein the first section and the second section are moved relative to each other in the longitudinal direction to adjust the length of the telescopic system, and wherein the telescopic system is selectively brought into a first configuration, a third configuration and / or a second configuration, preferably (in sequence) into the first configuration, the third configuration and the second configuration. Other method features result from the description of the telescopic system or the child seat or the base above and below. In particular, the functional features can be carried out as specific method steps (for example, specifically carrying out or causing the transfer from the third configuration to the second configuration).

[0086] Furthermore, the above task is also solved in particular by a method for detaching a child seat as described above or a base for a child seat from a motor vehicle seat, wherein the method is in particular immediately after or prior to the method described in the previous paragraph, and wherein the telescopic system is brought from the second configuration into the third configuration or from the second configuration into the first configuration (if possible via the third configuration). Other method features result from the description of the telescopic system or the child seat or the base above and below. In particular, the functional features can be carried out as specific method steps (for example, specifically carrying out or causing the transfer from the second configuration to the third configuration).

[0087] Other embodiments result from the dependent claims. Description of the Drawings

[0088] The present invention will be described below with the aid of embodiments, which are explained in more detail with the aid of the drawings. Herein:

[0089] Figure 1a A child seat with a telescopic system according to the invention is shown;

[0090] Figure 1b A child seat on a base for a child seat with a telescopic system according to Figure 1a is shown;

[0091] Figure 1c A base for a child seat with a telescopic system is shown;

[0092] Figure 2 A base for a child seat is shown, which has a lower side for placement on the seating surface of a motor vehicle seat;

[0093] Figure 3 A second section of the telescopic system according to the invention is shown, which has an operating element arranged on the side of the second section, wherein the release operation part is not operated;

[0094] Figure 4 Shown similar to Figure 3Illustration in which the release operation part has been operated;

[0095] Figure 5 Shows corresponding to Figure 3 the corresponding illustration, but now the internal structure of the unoperated operating element can be seen;

[0096] Figure 6 Shows corresponding to Figure 4 the corresponding illustration, but now the internal structure of the operated operating element can be seen;

[0097] Figure 7 Shows a telescopic system having a first section and a second section;

[0098] Figure 8 Shows a telescopic system having only half of the first section;

[0099] Figure 9 Shows an exploded view of the second section of the telescopic system;

[0100] Figure 10 Shows an illustration of the entire telescopic system, with enlarged views of the first locking member and different sections of the transmission element;

[0101] Figure 11 Shows half of the second section of the telescopic system, which has a first locking member according to the first configuration;

[0102] Figure 12 Shows half of the second section of the telescopic system, which has a first locking member according to the third configuration;

[0103] Figure 13 Shows half of the second section of the telescopic system, which has a first locking member according to the second configuration;

[0104] Figure 14 Shows an alternative embodiment of the telescopic system according to the present invention, wherein the transmission element has a blocking release section that is movable in the longitudinal direction relative to other components of the transmission element and is preloaded by a fifth spring;

[0105] Figure 15 Shows the telescopic system according to Figure 14 in the locked position;

[0106] Figure 16 Shows the telescopic system according to Figure 14 wherein the first locking member is lifted compared to Figure 15 ;

[0107] Figure 17 Shows the telescopic system according to Figure 14 wherein the first locking member is exactly located between two voids in the first section;

[0108] Figure 18 shows a telescopic system according to Figure 14 in which, in addition to the unlocking section, the transmission element is displaced in the direction of the proximal end (of the second section), so that Figure 17 compared to

[0109] Figure 19a shows the interaction of the components of the telescopic system in its adjusted position;

[0110] Figure 19b shows the interaction of the components of the telescopic system in its installed position; and

[0111] Figure 19c shows the interaction of the components of the telescopic system in its locked position. DETAILED DESCRIPTION

[0112] In the following description of the drawings, the same reference numerals are used for the same and identically acting components.

[0113] Figure 1a shows a child seat 10 with a telescopic system 100 according to the invention.

[0114] Figure 1b shows the child seat 10 on a base 11 for a child seat with a telescopic system 100.

[0115] Figure 1c shows the base 11 for a child seat with a telescopic system 100.

[0116] Figure 2 shows the base 11 for a child seat, which has a lower side 12 for placement on the seating surface of a motor vehicle seat and has a rear side 13 which is arranged to point in the direction of the backrest of the motor vehicle seat. Two first sections 110 of the telescopic system according to the invention are schematically shown in one-piece construction with the base 11 for a child seat. The two first sections 110 end flush with the lower side 12 of the base 11 for a child seat. They also do not project beyond the rear side 13 towards the rear.

[0117] Figure 3The second section 120 of the telescopic system is shown, which has a proximal end 121 configured as an end cap and a distal end 122. Similarly, an operating element 230 is shown on the side of the second section 120, which has a fixed section 231, a movable section 232, and a release operating part 234. The fixed section 231 has a through hole (not numbered) on its outer side. Depending on the position of the movable section 232 relative to the fixed section 231, a color mark (not shown) arranged on the movable section 232 can be seen in the through hole to indicate the current position of the first hook 130 shown here in its second position. The release operating part 234 is not operated, and the movable section 232 is in its initial 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, the first hook forms a notch (not numbered) at the distal end 122 of the second section 120.

[0118] In Figure 4 it is shown the same elements as in Figure 3 However, differently, now the release operating part 234 has been operated, and the movable section 232 is in the pressed-in position. The first hook 130 is in its first position, so that now only the operating section 134 can be seen.

[0119] Figure 5 Corresponding to Figure 3 while Figure 6 corresponds to Figure 4 However, now the internal structure of the operating element 230 can be seen separately: It can be seen that the release operating part 234 is rotatably supported about an axis (not numbered). Operating the release operating part against the force of a spring (not shown) causes one end of a structure configured as a third locking part (holding device) to pivot downward and allows the movable section 232 to be pressed in the direction of the proximal end 121. The pressing-in of the movable section 232 also takes place against the force of a spring (likewise not shown) and causes the first hook 130 to be transferred into the first position, as will be explained in detail later.

[0120] In Figure 7 it is shown a telescopic system 100 according to the invention, which has a first section 110 and a second section 120. The first section 110 has a plurality of cutouts 111 on its lower side, which are shown here as through holes. On the side facing the operating element 230 (not shown here), the first section 110 also has lateral guide slots 112. A first pin 236 and a second pin 237 extend through the lateral guide slots, and the first pin and the second pin are provided for connection to the operating element 230. The telescopic system 100 according to the invention is in its maximum pulled-out state.

[0121] Figure 8Fig. 0 shows the telescopic system 100 according to the present invention. For reasons of understanding, only half of it is shown here in the first section 110. The telescopic system 100 according to the present invention is shown here as being relatively greatly retracted, and it can be seen that the first pin 236 is firmly connected to the second section 120. In addition, it is now seen that the second section has a long hole 127 through which the second pin 237 extends.

[0122] Figure 9 As can be seen from the exploded view in Fig. 4, the second section 120 includes a first half 120a, a second half 120b and an end cap 120c. And in addition, it can be seen the first hook 130 together with the first / second spring 131, the transfer element 160 together with the second locking member 138, the first pin 236, the first locking member 200 and the long hole 127.

[0123] Figure 10 Fig. 8 shows again a view of the entire telescopic system 100 according to the present invention, which has a first section 110 and a second section 120. It can be seen that the first hook 130 is supported on the first protrusion 123 of the second section in the shown first position. The second locking member 138 is in the release position and is connected to the transfer element 160. The third protrusion 125 connects the two halves 120a and 120b of the second section 120 and gives the second section 120 more stability. In addition, the third protrusion 125 of the second section 120 and the clearance 166 of the transfer element 160 together form a second guiding part 102 as a side effect.

[0124] In the enlarged view of the section of the first locking member 200 and the transfer element 160 shown below, other details can be seen: The first locking member 200 has a locking section 201 which is wedge-shaped. As shown, the first acting section 202 can cooperate with the locking blocking section 162 to prevent the first locking member 200 from moving from the shown extended position to the retracted position, in which the locking section 201 engages with one of the cutouts 111 of the first section 110. The transfer element 160 has a support section 165 relative to the locking blocking section 162, and the transfer element can be supported on the second section 120 by using this support section.

[0125] The second acting section 203 of the first locking member 200 is opposite to the driving section 161 of the transfer element 160 and is arranged to cooperate with this driving section so as to move the first locking member 200 from the extended position to the retracted position. However, in the shown position of the transfer element 160, the driving section 161 and the second acting section 203 are spaced apart from each other.

[0126] There is a free space 204 between the first acting section 202 and the second acting section 203, and when the transfer element 160 is in the driving position, the locking blocking section 162 is located in this free space. On the side of the locking section 201 facing the proximal end 121, there is a third acting section 208, which is arranged to cooperate with the edge of the cutout 111 engaged by the first locking member 200 to displace the first locking member 200 in the direction of the retracted position.

[0127] The first locking member 200 is pivotally movable about a second axis 206, and the first locking member is supported at the second axis by a second supporting section 207. Two third springs 205 (one of the two third springs is a helical torsion spring and the other is a tension spring) tension the first locking member 200 towards the extended position. The third spring 205 configured as a helical torsion spring is supported at one end on the first locking member 200 and at the other end on the fourth protrusion 126 of the second section 120.

[0128] The third spring 205 configured as a tension spring is supported at one end on the first locking member 200 and at the other end on the second section 120. It can be seen that the support point of the third spring 205 configured as a tension spring is configured thinner than the rest of the first locking member 200. In the shown extended position, the first locking member 200 is supported on the fourth protrusion 126.

[0129] Figure 11 The second section 120 of the telescopic system 100 according to the invention is shown again. At the distal end 122, a first hook 130 with a locking section 135 is arranged, and the first hook 130 is rotatably supported about a first axis 132 by a first supporting section 133. The first / second spring 131 is fixed at a first end 131a to the first hook 130, more precisely approximately through the first supporting section 133, and at a second end 131b to an arm of the L-shaped second locking member 138.

[0130] The second locking member 138 can move together with the transmission element 160, which in particular has a drive section 161 and a detection section 164. In the shown adjusted position of the telescopic system 100 according to the invention, the first hook 130 is in its first position (open), the second locking member 138 is in its release position, and the transmission element 160 is in the drive position, the first locking member 200 is in the retracted position (according to the first configuration), and the (not shown) operating element 230 has been operated. Thus, the child seat 10 connected to the telescopic system 100 or the base 11 for the child seat connected to the telescopic system 100 is not fixed to the vehicle seat 1, and the length of the telescopic system 100 can be freely adjusted between a minimum pull-out amount and a maximum pull-out amount. The sensor 180 is schematically shown.

[0131] Figure 12 Shows the same elements as Figure 11 However, the telescopic system 100 according to the invention is now in the installed position. In addition, the first hook 130 is in the first position (open), while the second locking member 138 is in the release position. However, the transmission element 160 is now in the second non-drive position, and the first locking member 200 is in the extended position (according to the third configuration). The (not shown) operating element 230 is not operated. The telescopic system 100 is not fixed to the vehicle seat 1, and the length of the telescopic system 100 cannot be changed because the locking blocking section 162 of the transmission element 160 blocks the first locking member 200 at the first acting section 201 and holds it in the extended position.

[0132] Figure 13 Shows the elements already shown in Figure 11 and Figure 12 However, the telescopic system 100 according to the invention is now in the locked position. Now the first hook 130 is in the second position, the second locking member 138 is in the locked position, and the transmission element 160 is in the first non-drive position. The first locking member 200 is in the extended position (according to the second configuration), and the (not shown) operating element 230 is not operated. The telescopic system 100 and, if possible, the child seat 10 connected thereto or the base 11 for the child seat connected thereto are fixed to the vehicle seat 1, and the length of the telescopic system 100 cannot be increased, but can only be reduced when a force that squeezes the first section 110 and the second section 120 relative to each other acts on the first section 110 or the child seat 10 or the base 11 for the child seat. It can be seen that the sensor 180 is now no longer opposite the detection section 164, so that a distinction can be made between the locked position and the release position of the second locking member 138 (and thus between the first position and the second position of the first hook 130).

[0133] Figures 14 to 18An alternative embodiment of the telescopic system 100 according to the invention is shown. This embodiment corresponds essentially to the previously shown embodiment, however, the transmission element 160 here has a release section 167 which is movable in the longitudinal direction relative to the other parts of the transmission element 160 and which is prestressed towards the proximal end 121 of the second section 120 by means of a fifth spring 168. The embodiment shown solves the problem that it is at least theoretically conceivable that the first locking element 200 comes to rest exactly between the two recesses 111 of the first section 110 and could then block the entire telescopic system 100. At this point it should be noted that Figures 14 to 18 In the figure, the first / second spring 131 and the fifth spring 168 are only schematically shown.

[0134] Figure 15 and Figure 14 The telescopic system 100 is shown in the same manner. Figure 13 ), the blocking release section 167 and the fifth spring 168 have not yet taken effect.

[0135] exist Figure 16 , the second locking member 138 is still in its locking position relative to the first hook 130. Due to a force that pushes the first section 110 and the second section 120 against each other, the first locking member 200 is lifted by the joint action of the edge of one of the recesses 111 and the third action section 208.

[0136] When Figure 17 When the first locking element 200 shown in FIG. 1 is stopped just between the two recesses 111 of the first section 110 and the user attempts to transfer the second locking element 138 from its locking position to the release position by operating the operating element 230 (not shown) so as to enable the first hook 130 to be transferred from the second position to the first position, the locking blocking section 162 may abut against the first action section 201. Figure 18 As shown in FIG. 1 , the transmission element 160 (except for the blocking release section 167 ) can be displaced in the direction of the proximal end 121 against the force of the fifth spring 168 , so that the second locking element 138 can still reach the release position.

[0137] Figures 19a to 19c The essential interaction of the components of the telescopic system 100 according to the invention, namely the second section 120 , the first hook 130 , the transmission element 160 with the second locking element 138 and the first locking element 200 , is again shown very schematically. Figure 19a Shows the adjustment position, Figure 19b shows the installation location, and Figure 19c Shown in locked position.

[0138] It should be noted at this point that all parts described above, individually and in any combination, in particular the details shown in the drawings, are claimed as an important part of the invention. Modifications thereof are known to those skilled in the art.

[0139] Furthermore, it should be noted that the broadest possible scope of protection is sought. In this regard, the disclosure contained in the claims can also be specified by features described together with additional features (even if these additional features do not necessarily have to be incorporated). It is expressly stated that parentheses and the term "in particular" should give rise to the optionality of a feature in the respective context (which, conversely, should not mean that a feature is to be regarded as mandatory in the respective context without such an express specification). The term "element" should preferably identify a correspondingly associated structure which can in turn be connected to at least one other structure (to form an integral and / or immovable overall structure if possible) or can be demarcated from all other structures.

[0140] List of reference signs

[0141] 1 Motor vehicle seat

[0142] 2 Motor vehicle seat backrest

[0143] 3 Motor vehicle seat seating surface

[0144] 4 Bowed member

[0145] 10 Child seat

[0146] 11 Base for child seat

[0147] 12 Lower side

[0148] 13 Rear side

[0149] 100 Telescopic system

[0150] 101 First guide part

[0151] 102 Second guide part

[0152] 110 First section

[0153] 111 Void

[0154] 112 (Lateral) guide seam

[0155] 120 Second section

[0156] 120a, 120b First half and second half

[0157] 120c End cap

[0158] 121 Proximal end

[0159] 122 distal end

[0160] 123 first protrusion

[0161] 124 second protrusion

[0162] 125 third protrusion

[0163] 126 fourth protrusion

[0164] 127 oblong hole

[0165] 130 first hook

[0166] 131 first / second spring

[0167] 131a, 131b first and second ends of the first / second spring

[0168] 132 first axis

[0169] 133 first support section

[0170] 134 operation section

[0171] 135 locking section

[0172] 135a, 135b legs

[0173] 136 engagement section

[0174] 137 hook blocking section

[0175] 138 second locking member

[0176] 139 locking section

[0177] 140 first abutment section of the second locking member

[0178] 160 transmission element

[0179] 161 drive section

[0180] 162 locking blocking section

[0181] 163 second abutment section of the transmission element

[0182] 164 detection section

[0183] 165 support section

[0184] 166 clearance

[0185] 167 unlocking section

[0186] 168 fifth spring

[0187] 180 sensor

[0188] 200 First locking member

[0189] 201 Locking section

[0190] 202 First acting section

[0191] 203 Second acting section

[0192] 204 Free space

[0193] 205 Third spring

[0194] 206 Second axis

[0195] 207 Second supporting section

[0196] 208 Third acting section

[0197] 230 Operating element

[0198] 231 Fixed section

[0199] 232 Movable section

[0200] 233 Retaining device

[0201] 234 Release operating part

[0202] 235 Fourth spring

[0203] 236 First pin

[0204] 237 Second pin

Claims

1. A telescopic system (100) for fixing a child seat (10) and / or a base (11) for a child seat to a motor vehicle seat (1), wherein, The telescopic system (100) comprises a first section (110) and a second section (120), wherein the first section and the second section are movable relative to each other in a longitudinal direction to adjust the length of the telescopic system (100), wherein, a first locking member (200) is arranged in or on the second section, wherein the telescopic system can be brought into at least a first configuration, a second configuration and a third configuration, wherein in the first configuration the length of the telescopic system (100) can be adjusted, in the second configuration the adjustment of the length of the telescopic system (100) can be restricted compared to the first configuration, and in the third configuration the adjustment of the length of the telescopic system (100) can be further restricted or cannot be carried out compared to the second configuration.

2. The telescopic system (100) according to claim 1, characterized in that, The first section (110) is - if possible detachably - fixed or fixable to the child seat (10) or the base (11) for a child seat, and / or is integrally formed with the child seat (10) or the base (11) at least in part, wherein the second section (120) is preferably provided for detachably fixing to a motor vehicle seat (1) and has a proximal end (121) and a distal end (122), wherein a first hook (130) is further preferably provided in the region of the distal end (122) of the second section (120), which first hook is adapted to surround a vehicle-side bow member (4), in particular an Isofix anchor or an anchor conforming to ISO 13216 standard or UN ECE R 145 standard, in order to couple the telescopic system (100) to the motor vehicle seat (1), wherein the first hook (130) can be switched between a first position and a second position, in the first position the first hook does not couple the telescopic system (100) to the motor vehicle seat (1), and in the second position the first hook couples the telescopic system (100) to the motor vehicle seat (1).

3. The telescopic system (100) according to any one of the preceding claims, characterized in that, The second section (120) is at least 4 cm long, preferably at least 8 cm long, and / or at most 40 cm long, preferably at most 30 cm long, and / or the first section (110) is at most 40 cm long and / or is at least half as long as the second section (120).

4. The telescopic system (100) according to any one of the preceding claims, characterized in that, The difference between the minimum length and the maximum length of the telescopic system (100) is at least 4 cm, preferably at least 8 cm, and / or at most 30 cm, preferably at most 20 cm.

5. The telescopic system (100) according to any one of the preceding claims, characterized in that, A second locking member (138) is arranged in and / or on the second section (120), which second locking member can be displaced between a locking position and / or a release position, in the locking position the second locking member (138) holds the first hook (130) in its second position, and in the release position the second locking member (138) does not hold the first hook (130) in its second position.

6. The telescopic system (100) according to any one of the preceding claims, characterized in that, The first section (110) has a plurality of, at least two - preferably 4 to 15 - voids (111) spaced apart from each other in the longitudinal direction.

7. The telescopic system (100) according to any one of the preceding claims, characterized in that, The first locking member (200) having a locking section (201) that can selectively engage or disengage from a mating structure of the first section (110), in particular one of the cutouts (111) of the immediately preceding claim of the first section, so as to adjust the second section (120) relative to the first section (110) in the longitudinal direction in terms of the length of the telescopic system (100), wherein the locking section (201) preferably can occupy at least one retracted position corresponding to a first configuration, and / or the locking section (201) can occupy an extended position corresponding to a second and / or third configuration, and / or having a first acting section (202) so as to be held in the extended position according to the third configuration, and / or having a second acting section (203) so as to be held in the retracted position according to the first configuration, and / or having a third acting section (208), in particular as part of the locking section (201), which is adapted according to the second configuration to contact an edge of the mating structure - in particular the cutout (111) of the first section (110) - when the first section and the second section (120) are pushed against each other by a force to reduce the length of the telescopic system (100), wherein the third acting section (208) is preferably inclined relative to the longitudinal direction, so that the first locking member (200) is pushed in the direction of the retracted position by the contact of the third acting section (208) and the resulting force.

8. The telescopic system (100) according to any one of the preceding claims, characterized in that, A transmission element (160) is provided. The transmission element is movably, preferably displaceably, in particular longitudinally displaceably, arranged in and / or on the second section (120) between at least one first non-driven position, a second non-driven position, and a driven position, wherein the transmission element (160) has a drive section (161) that is adapted to selectively cooperate with the second acting section (203) of the first locking member (200) so as to transfer the first locking member from the extended position to the retracted position, and / or has a locking blocking section (162) that is adapted to selectively cooperate with the first acting section (202) of the first locking member (200) so as to prevent the first locking member from being transferred from the extended position to the retracted position, and / or is operatively connected to a second locking member (138) such that the movement of the transmission element (160) can - if possible with the aid of an operating element (230) - release the second locking member (138) to switch between a release position and / or a locked position.

9. The telescopic system (100) according to any one of the preceding claims, characterized in that, A first pin (236) - in particular firmly - is connected to the second section (120), and / or a second pin (237) - in particular firmly - is connected to the transmission element (160), wherein the first pin and the second pin (237) are provided for connection to the operating element (230). Among them, the first section (110) preferably has a lateral guiding slit (112) which extends in the longitudinal direction, preferably over at least 50% of the length of the first section (110), and wherein, further preferably, both the first pin (236) and the second pin (237) extend through the lateral guiding slit.

10. The telescopic system (100) according to any one of the preceding claims, characterized in that, The second section (120) has an elongated hole (127) which overlaps a section of the lateral guiding slit (112) of the first section (110) and enables the movement of the second pin (237) in the longitudinal direction towards or away from the first pin.

11. The telescopic system (100) according to any one of the preceding claims, characterized in that, An operating element (230) is provided, which is especially for being preferably manually operated by a user, wherein the fixed section (231) of the operating element (230) is connected to the second section (120) through the first pin (236) - especially firmly - and the movable section (232) of the operating element (230) is operatively connected to the transmission element (160) through the second pin (237) and is movable relative to the fixed section (231) here and can be blocked by a holding device (233) - especially a third locking member - and wherein a release operation part (234) is provided to release the holding device (233).

12. The telescopic system (100) according to any one of the preceding claims, characterized in that, The telescopic system can be brought to the following positions: Adjustment position, in which the first hook (130) is in the first position, the second locking member (138) is in the release position, and the transmission element (160) is in the driving position, wherein the first locking member (200) is in the retracted position according to the first configuration, and the operating element (230) is operated, so that the telescopic system (100) and thus the child seat (10) or the base (11) for the child seat are not fixed to the vehicle seat (1), such that the length of the telescopic system (100) is adjustable, and / or Locking position, in which the first hook (130) is in the second position, the second locking member (138) is in the locking position, and the transmission element (160) is in the first non - driving position, wherein the first locking member (200) is in the extended position according to the second configuration, and the operating element (230) is not operated, so that the telescopic system (100) and thus the child seat (10) or the base (11) for the child seat are fixed to the vehicle seat (1), wherein the length of the telescopic system (100) can only be reduced, and / or Installation position, in which the first hook (130) is in the first position, the second locking member (138) is in the release position, and the transmission element (160) is in the second non - driving position, wherein the first locking member (200) is in the extended position according to the third configuration, and the operating element (230) is not operated, so that the telescopic system (100) and thus the child seat (10) or the base (11) for the child seat are not fixed to the vehicle seat (1), such that compared with the second configuration, the length of the telescopic system (100) can be changed with further limitation or cannot be changed, and / or Intermediate position, when the telescopic system (100) shortens starting from the locked position and the first locking member (200) has not yet reached the next cutout (111), wherein when the first section (110) and the second section (120) are pulled apart from each other, the length of the telescopic system (100) can increase slightly, in particular until the first locking member (200) engages in the previous cutout (111).

13. A child seat (10) or a base (11) for a child seat, comprising two telescopic systems (100) arranged side by side according to any one of the preceding claims, the telescopic system being in particular for fixing the child seat (10) or the base (11) for a child seat to a motor vehicle seat (1), the telescopic system being in particular compatible with an Isofix anchor or an anchor conforming to the ISO 13216 standard or the UN ECE R 145 standard.

14. A method for fixing a child seat (10) or a base (11) for a child seat to a motor vehicle seat (1), said child seat or base for a child seat being the child seat or base for a child seat according to the immediately preceding claim, wherein, Move the first section (110) and the second section (120) relative to each other in the longitudinal direction to adjust the length of the telescopic system (100), wherein the telescopic system (100) is selectively brought into the first configuration, the third configuration and / or the second configuration, preferably into the first configuration, the third configuration and the second configuration.

15. A method for detaching a child seat (10) or a base (11) for a child seat from a motor vehicle seat (1), said child seat or base for a child seat being the child seat or base for a child seat according to claim 13, wherein, It is possible to bring the telescopic system (100) from the second configuration into the third configuration, or from the second configuration into the first configuration.

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