WO2010043347A1

WO2010043347A1 - Fastening arrangement of a child seat on a component of a vehicle and child seat

Info

Publication number: WO2010043347A1
Application number: PCT/EP2009/007262
Authority: WO
Inventors: Karl-Holger Kislinger; Andre Schnoeller
Original assignee: Daimler Ag
Priority date: 2008-10-15
Filing date: 2009-10-09
Publication date: 2010-04-22
Also published as: DE102008051693A1; EP2334510A1

Abstract

The invention relates to a fastening arrangement of a child seat (1) on a component of a vehicle, comprising at least one pair of connecting elements having a connecting element (3, 4) on the side of the child seat and a connecting element on the side of the vehicle, which are connected to each other in a usage position of the child seat (1), wherein a force absorption unit (5), which can absorb forces acting on the child seat (1), is associated with the at least one pair of connecting elements. The invention further relates to a child seat (1) for a vehicle.

Description

Fastening arrangement of a child seat on a component of a vehicle and child seat

The present invention relates to a fastening arrangement of a child seat on a component of a vehicle, with at least one pair of connecting elements with a child seat side connecting element and a vehicle-side connecting element, which are connected to each other in a position of use of the child seat. Furthermore, the invention relates to a child seat for a vehicle, comprising at least one connecting element, which is connectable to a corresponding vehicle-side connecting element.

The interest is directed in the present case in particular to an ISOFIX fastening system for fastening a child seat to a vehicle seat of a motor vehicle. Such mounting arrangements are already known to be known from the prior art. DE 103 51 753 A1 discloses a child seat which can be fastened by means of a fastening arrangement on a vehicle seat in a use position. The fastening arrangement is provided in the form of an ISOFIX fastening in a manner known per se. In the known vehicle seat means are provided, through which the child seat is movable in a crash case from the use position to a deceleration position. The means may comprise mutually displaceable sliding devices. A covered in a crash movement path of the child seat is to reduce the occurring in the event of a crash deceleration forces.

The problem underlying the invention is to increase the ride comfort and safety when using a child seat compared to the prior art.

To solve this problem, a fastening arrangement with the features of claim 1 and a child seat with the features of claim 12 are proposed. Advantageous embodiments of the invention are specified in the dependent claims.

A fastening arrangement according to the invention of a child seat on a component of a vehicle comprises at least one pair of connecting elements with a child seat-side connecting element and a vehicle-side connecting element, which are connected to one another in a use position of the child seat. An essential idea is that at least one

Connecting element pair is assigned a power receiving unit, which are to be absorbed by acting on the child seat forces.

The force-absorbing unit is understood here to mean, in particular, a device which has at least one energy-absorbing element which is capable of deforming when the forces acting on the child seat during travel are deformed, that is to say by which the forces acting on the child seat are absorbed and / or those are absorbed the child seat initiated vibrations are damped. In this way, it is possible to suppress the loads transmitted to the child seat during the acceleration and deceleration of the vehicle and thus to increase driving comfort and safety. Furthermore, as a result, the vibrations of the child seat can be suppressed or damped.

The power receiving unit may be assigned to the child-side connecting element. In particular, the force-receiving unit adjoins the child-seat-side connecting element at least indirectly. The arrangement of the power unit on the side of the child seat, the mounting arrangement according to the invention can also be provided in vehicles that already have a vehicle-side connecting element for securing the child seat, such as an ISOFIX connecting element. An already existing in the vehicle connecting element must therefore not be adapted in a complex manner.

It has been found to be particularly advantageous if the power unit comprises a shock absorber. By using a shock absorber, the vibrations transmitted to the child seat from the vehicle can be suppressed or quickly damped. This embodiment offers particular advantages in terms of ride comfort. In particular, with a large acceleration or deceleration of the vehicle, the forces acting on the child seat forces can be absorbed by a deformation of the shock absorber by using the shock absorber. Preferably, the shock absorber is provided as a hydraulic shock absorber and preferably has a cylinder filled with a liquid, in which a corresponding piston rod can be pushed with a piston. By means of such a shock absorber, a noise-reduced absorption of the forces transmitted to the child seat or a noise-reduced damping of the vibrations introduced onto the child seat is made possible with regard to the driving comfort. According to an alternative embodiment, the shock absorber may be provided as a mechanical shock absorber having a plurality of spring blades. By using a mechanical shock absorber, a robust, durable and cost-reduced power unit can be created.

In addition or as an alternative to the shock absorber, the force receiving unit may have a spring element, in particular in the form of a helical spring. It can thus be achieved that the child seat after returning a certain path of movement after discharge returns to the original use position. The spring element also makes it possible to intercept the shocks introduced by the vehicle into the child seat. If both a shock absorber and a spring element are provided in the power take-up unit, then both the vibrations of the child seat can be suppressed by the power take-up unit and the shocks introduced into the child seat can be intercepted.

Preferably, the spring element has a predetermined spring characteristic. The spring element may have, for example, a progressive, a linear, a degressive, a substantially constant or a discontinuous dependence of a spring force on a path. In this case, a progressive characteristic of the spring force has proven to be particularly advantageous as a function of the spring travel, in which a strike-through or too long a movement path can be prevented at a high load on the child seat. The progressive characteristic also allows a soft and thus comfortable suspension in a normal or low acting on the child seat load.

If both the shock absorber and the spring element are provided in the force receiving unit, the spring element can be arranged on the shock absorber on the outside and preferably extend over an at least approximately entire length of the shock absorber. In such a parallel arrangement of the spring element to the shock absorber, the damping properties of the shock absorber be influenced by appropriate design of the spring element. For example, a breakaway force of the piston rod, ie force at which the piston rod sets in motion, be adjusted by appropriate selection of the properties of the spring element.

The spring element may alternatively be arranged within a cylinder of the shock absorber filled with liquid. It can be provided that the spring element is supported on an inner space of the cylinder limiting end wall and extending in the interior in the main extension direction of the cylinder only over a certain length range of the cylinder. In such an arrangement of the spring element this is used only after covering a certain path of movement of the child seat. Thus, up to a certain path of movement, only the shock absorber and, after covering this movement path, both the shock absorber and the spring element can be used.

Alternatively, the spring element can connect to the shock absorber at least indirectly, in particular directly. In such a serial arrangement of the spring element to the shock absorber, the breakaway force of the piston rod of the shock absorber can be matched to the characteristic of the spring element that small acting on the child seat forces are absorbed only by means of the shock absorber. For large forces or transmitted to the child seat bumps then the spring element can be used. Depending on the characteristic of the spring element and properties of the shock absorber, an optimum adjustment of the power take-up unit can thus be achieved.

It may, as in a conventional ISOFIX mounting arrangement, at least two spaced apart pairs of connecting elements, each with a child seat side connecting element and a vehicle-side connecting element may be provided, in which case each pair of connecting elements is associated with a power receiving unit. As a result, a particularly comfortable and secure mounting arrangement of the child seat is created.

In order to provide a cost-reduced fastening arrangement, the connecting element pairs may alternatively be assigned a common force-receiving unit. In this embodiment, the at least two pairs of connecting elements are rigidly connected to one another by means of a connecting rod, and the force receiving unit can be connected to the connecting rod. It has been found to be particularly advantageous if the force-receiving unit is associated with a travel restriction device, by means of which a movement path of the child seat covered by a deformation of the force-receiving unit during its force absorption is to be limited. This embodiment is based on the fact that the child seat is allowed to travel only a certain way according to the regulations. By using the path limiting device so the movement of the child seat is limited only to a specified in the rules route. This travel restriction device may, for example, have a stop which limits the deformation of the force-receiving unit when it receives power.

An inventive child seat for a vehicle comprises at least one connecting element, which is connectable to a corresponding vehicle-side connecting element. In the child seat, a force receiving unit is provided which is connected at least indirectly with the connecting element.

The preferred embodiments presented with reference to the fastening arrangement according to the invention and in particular their advantages apply correspondingly to the child seat according to the invention.

Further advantages, features and details of the invention will become apparent from the following description of individual preferred embodiments and with reference to the accompanying drawings. Showing:

1 is a schematic side view of a child seat after a

Embodiment of the invention, comprising two connecting elements and in each case a coupled thereto power unit;

Fig. 2 is a schematic representation of a plan view of a child seat side

Fastening device including two connecting elements, each associated with a power receiving unit;

Fig. 3 is a schematic representation of a plan view of a child seat side

Fastening device including two connecting elements, which is associated with a common power receiving unit; 4 is a schematic representation of the power take-up unit according to a first embodiment;

5 is a schematic representation of the power receiving unit according to a second embodiment;

6 is a schematic representation of the power take-up unit according to a third embodiment;

Fig. 7 possible courses of a dependence of a spring force of a

Spring travel of a spring element of the power take-up unit;

8 is a schematic representation of the power take-up unit according to a fourth embodiment;

9 is a schematic representation of the power take-up unit according to a fifth embodiment; and

10 is a schematic representation of the power take-up unit according to a sixth embodiment.

In the figures, the same as well as functionally identical elements are provided with the same reference numerals.

A child seat 1 shown in FIG. 1 is associated with a fastening device 2, which is designed for fastening the child seat 1 on a vehicle seat, such as on a seat of a passenger car. The fastening device 2 has two spaced-apart connecting elements 3, 4, which are formed in the example as ISOFIX connecting elements. The connecting elements 3, 4 are thus connected to a respective body-mounted headband of the vehicle.

In order to reduce the loads transmitted to the child seat 1 at high delays and accelerations of the vehicle or to dampen vibrations introduced onto the child seat 1, the fastening device 2 has two power receiving units 5. In this case, a first force-receiving unit 5 with the first connection element 3 and a second force-receiving unit 5 with the second Connecting element 4 connected. In the illustrated embodiment, the respective force receiving unit 5 connects directly to the associated connecting element 3, 4.

Fig. 2 is a plan view of the fastening device 2 of FIG. 1 in a schematic representation again. As already mentioned, here each of the connecting elements 3, 4 is assigned a force-receiving unit 5 for receiving the forces acting on the child seat 1. The respective power receiving units 5 and the connecting elements 3, 4 are rigidly connected to each other by means of a connecting rod 6, which is coupled to a lower frame of the child seat 1.

In order to provide a cost-reduced child seat 1, it is provided according to an alternative embodiment, that the first and the second connecting element 3, 4 is associated with a common power receiving unit 5. This is illustrated by a plan view of the fastening device 2 in Fig. 3. Shown are the first and the second connecting element 3, 4, which are directly connected to the connecting rod 6. In this case, in contrast to the example of FIG. 2, the mounting rod 6 is coupled via the power receiving unit 5 to the undercarriage of the child seat 1.

Hereinafter, the structure and operation of the power unit 5 will be explained in more detail:

As already mentioned, the force-receiving unit 5 is designed to receive the transmitted to the child seat 1 acceleration or deceleration forces and to dampen vibrations of the child seat 1. FIGS. 4 to 6 and FIGS. 8 to 10 each show an example of the force-receiving unit 5.

According to a first embodiment shown in FIG. 4, the force-receiving unit 5 has a shock absorber 7, which comprises a cylinder 8 filled with oil. The cylinder 8 has an inner space 9, in which a piston rod 10 with a arranged at the end of the piston 11 can be moved. In this case, the piston 11 has a plurality of passage openings, via which the oil flows during displacement of the piston rod 10 along a main extension direction of the cylinder 8. The resistance generated by this flow creates pressure differences that result in the generation of damping forces. Thus, through the shock absorber 7 are attenuated transmitted from the side of the vehicle to the child seat 1 vibrations, which increases the ride comfort while driving.

A second embodiment of the power unit 5 is shown in FIG. 5. The power receiving unit 5 has forth next to the shock absorber 7 also has a spring element 12. The spring element 12 is here designed in the form of a helical spring and arranged on the shock absorber 7 on the outside. In this case, the spring element 12 on the one hand on a flange 13 which is formed on a piston 11 opposite the end of the piston rod 10, and on the other hand on a flange 14 which is formed on a flange 13 distal end of the cylinder 8, supported. By such a configuration of the power receiving unit 5, a spring-damper system is provided, by means of which both the vibrations damped, and the transmitted to the child seat 1 shocks or loads can be collected.

With regard to the spring characteristic of the spring element used in the embodiment of FIG. 5, reference is made to FIG. 7. This shows a plurality of dependencies of a spring force F as a function of a spring travel S, which travels the spring element 12 after exerting the spring force F. FIG. 7 shows a constant characteristic 15, a progressive characteristic 16, a linear characteristic 17, a degressive characteristic 18 and a discontinuous characteristic 19. In the exemplary embodiment according to FIG. 5, the spring element 12 has the progressive dependence (characteristic curve 16) of the spring force F on the spring travel S. By selecting the progressive characteristic 16 is achieved that even small vibrations of the child seat 1 can be damped by a movement of the piston rod 10, with a strike-through is prevented at a high load.

Fig. 6 shows the power receiving unit 5 according to another embodiment. Here, the power unit 5 also has the shock absorber 7 and a spring element 12. In contrast to the example according to FIG. 5, the spring element 12 is now arranged inside the cylinder 8, that is to say in the interior 9 of the cylinder 8. In this case, the spring element 12 is supported on an end wall 20 of the cylinder, through which the piston rod 10 is guided. The spring element 12 further extends along the piston rod 10 of the end wall 20 over only a certain length range of the cylinder 8, for example over one third of the entire length of the cylinder 8. By such an arrangement of the spring element 12, this is in a position of use of the child seat 1, So in a position in which the piston rod 10 is disposed completely in the interior 9 of the cylinder 8, not used. Act on the child seat 1 in the use position only small deceleration forces or vibrations, they are absorbed or absorbed by the shock absorber 7. However, if large deceleration forces or shocks are transmitted to the child seat 1, then the spring element 12 assists the shock absorber 7 in absorbing the occurring deceleration forces. Thus, both advantages in terms of ride comfort on the child seat 1, as well as in terms of driving safety are achieved.

8 shows a schematic representation of a section of a further exemplary embodiment of the force-receiving unit 5 which, in addition to or as an alternative to the shock absorber 7 and / or the spring element 12 described above, has a deformation element 30, for example a sheet metal tab or the like, with a deformation section 32 within which deforms the deformation element in a shift of the child seat in the event of a crash, so as to possibly even at first to allow a shift of the child seat and to reduce the forces acting on the child sitting in the child seat deceleration forces. In this case, the deformation portion 32 may have corresponding weakenings in the form of, for example, notches, beads, recesses or the like, as can be seen in Fig. 8, to ensure the deformation of the deformation element 30 exactly at this section. In Fig. 8, the deformation element 30 is shown in already deformed state. The deformation is due to the material at least largely irreversible, that is, the deformation element is plastically deformed.

Fig. 9 shows a schematic representation of a section of another embodiment of the power receiving unit 5, which analogously to the embodiment of FIG. 8 additionally or alternatively to the shock absorber 7 and / or the spring element 12, a deformation element 30, for example a sheet metal tab or the like, having is provided with a rubber element 34. This is designed so that it is yielding both under tensile and compressive load and at least at lower forces, such as those that occur, for example, by vibrations during driving, only elastically deformed and regresses in discharge to its original shape.

10 shows a schematic illustration of a section of a further exemplary embodiment of the force-receiving unit 5, which essentially differs from the force-receiving unit described with reference to FIG. 8 in that the deformation element 30 consists of a flowable material. This flows when exceeding a certain limit tensile force and thus allows one Movement path of the child seat to reduce the deceleration forces. The deformation portion 32 of the deformation element 30 can spontaneously arise at any point or else be defined defined by appropriate measures, for example by a taper of the deformation element in a certain length range. The deformation is materially at least largely irreversible, that is, the deformation element is plastically deformed.

In the examples according to FIGS. 4 to 6 and 8 to 10, the force-receiving unit 5 can also be assigned a travel-limiting device, which is provided, for example, in the form of a stop. This path limiting device has the task of limiting the distance traveled by the child seat 1 in the power by means of the power unit 5 movement paths. This is due to the fact that in the regulations only certain ways are allowed, which the child seat 1 may cover relative to the vehicle seat. The travel restriction may, for example, be such that the piston rod 10 can only be pulled out of the cylinder 8 up to a predetermined point until it reaches the stop.

Claims

claims

1. Fastening arrangement of a child seat (1) on a component of a vehicle, with at least one pair of connecting elements with a child seat side connecting element (3, 4) and a vehicle-side connecting element, which are connected in a use position of the child seat (1), characterized in that the at least one pair of connecting elements is associated with a force receiving unit (5) through which forces acting on the child seat (1) are to be accommodated.

2. Fastening arrangement according to claim 1, characterized in that the force receiving unit (5) is assigned to the child seat side connecting element (3, 4).

3. Fastening arrangement according to claim 1 or 2, characterized in that the force receiving unit (5) comprises a shock absorber (7).

4. Fastening arrangement according to claim 3, characterized in that the shock absorber (7) has a cylinder filled with a liquid (8), in which a corresponding piston rod (10) with a piston (11) can be pushed.

5. Fastening arrangement according to one of the preceding claims, characterized in that the force receiving unit (5) has a spring element (12).

6. Fastening arrangement according to claim 5, characterized in that the spring element (12) has a predetermined spring characteristic, in particular a progressive (16), a linear (17), a degressive (18), a substantially constant (15) or a discontinuous ( 18) dependency of a spring force (F) of a spring travel (S).

7. Fastening arrangement according to claim 3 or 4 and 5 or 6, characterized in that the spring element (12) on the shock absorber (7) is arranged on the outside and preferably extends over an at least approximately entire length of the shock absorber (7).

8. Fastening arrangement according to claim 3 or 4 and 5 or 6, characterized in that the spring element (12) to the shock absorber (7) at least indirectly, in particular directly, connects.

9. Fastening arrangement according to one of the preceding claims, characterized in that at least two spaced apart pairs of connecting elements, each with a child seat side connecting element (3, 4) and a vehicle-side connecting element are provided, wherein each pair of connecting elements is associated with a force receiving unit (5).

10. Fastening arrangement according to one of claims 1 to 8, characterized in that at least two spaced apart pairs of connecting elements, each with a child seat side connecting element (3, 4) and a vehicle-side connecting element are provided, wherein the Connecting element pairs is assigned a common power receiving unit (5).

11. Fastening arrangement according to one of the preceding claims, characterized in that the force-receiving unit (5) is associated with a Wegränschrkungseinrichtung, by means of which by a deformation of the power receiving unit (5) in their force absorption zurückgelegter movement path of the child seat (1) is to limit.

12. Child seat (1) for a vehicle, with at least one connecting element (3, 4), which is connectable to a corresponding vehicle-side connecting element, characterized in that a power receiving unit (5) is provided, which with the connecting element

(3, 4) is connected at least indirectly.

13. Fastening arrangement according to one of the preceding claims, characterized in that the force receiving unit (5) has an elastically and / or plastically deformable deformation element (30) or is formed by this.

14. Fastening arrangement according to claim 13, characterized in that the deformation element (30) has a deformation portion (32) which is formed by a rubber element (34), due to the material and / or by at least one weakening.