Child seat

Abstract

The invention relates to a child seat ( 1 ) which can be fastened to a vehicle seat of a motor vehicle by means of a three-point seat belt ( 14 ). It is also possible for the child seat also to be connected to the supporting structure of the vehicle via an ISOFIX fastening system ( 17 ). The three-point seat belt ( 14 ) is equipped with a tightening device. The child seat ( 1 ) has its own belt system for securing a child sitting on the child seat. According to the invention, it is proposed that the three-point seat belt ( 14 ) be coupled to the belt system of the child seat ( 1 ). This coupling makes it possible, during a preventative or crash-active tightening of the three-point seat belt ( 14 ), for the belt system of the child seat ( 1 ) also to be tightened without a separate tightening device being necessary.

1 - 16 . (canceled)  
   
   
       17 . A child seat for a vehicle seat having a three-point seat belt with a tightening device, the child seat comprising a belt system for securing a child sitting on the child seat, wherein the three-point seat belt is coupled to the belt system.  
   
   
       18 . The child seat as claimed in  claim 17 , further comprising a coupling element which is connected to the belt system, wherein a tightening of the three-point seat belt activates the coupling element, causing a tightening of the belt system.  
   
   
       19 . The child seat as claimed in  claim 18 , wherein the coupling element is a belt strap, a first free end of the belt strap being connected to the three-point seat belt, and a second free end of the belt strap being connected to the belt system.  
   
   
       20 . The child seat as claimed in  claim 19 , further comprising upper and lower belt deflections, wherein the three-point seat belt is guided about the upper and lower belt deflections, the lower belt deflection being activated when the three-point seat belt is tightened.  
   
   
       21 . The child seat as claimed in  claim 20 , further comprising a lower transverse strut, wherein the lower belt deflection is designed as a clip which is mounted on the lower transverse strut.  
   
   
       22 . The child seat as claimed in  claim 20 , wherein the upper belt deflection is designed as an upper transverse strut.  
   
   
       23 . The child seat as claimed in  claim 22 , further comprising two side cheeks, wherein the upper transverse strut is connected to the lower transverse strut by the two side cheeks.  
   
   
       24 . The child seat as claimed in  claim 23 , wherein the first end of the belt strap is fastened to the clip.  
   
   
       25 . The child seat as claimed in  claim 24 , further comprising a back rest, wherein the belt system comprises a harness belt having a Y-distributor provided in the back rest.  
   
   
       26 . The child seat as claimed in  claim 25 , wherein the second end of the belt strap is fastened to the Y-distributor.  
   
   
       27 . The child seat as claimed in  claim 26 , wherein the belt strap is guided via deflecting bars.  
   
   
       28 . The child seat as claimed in  claim 27 , wherein the belt strap is guided via a tensioning pulley which is held displaceably in a linear guide.  
   
   
       29 . The child seat as claimed in  claim 28 , wherein the tensioning pulley is connected to a latching device of the belt system via a second belt strap.  
   
   
       30 . The child seat as claimed in  claim 29 , further comprising a force-limiting system for limiting a belt force.  
   
   
       31 . The child seat as claimed in  claim 30 , wherein the force-limiting threshold for the belt force is dependent on the belt length or belt position set.  
   
   
       32 . The child seat as claimed in  claim 31 , wherein a fastening system is provided with which the child seat is fastened to the supporting structure of the vehicle.  
   
   
       33 . The child seat as claimed in  claim 17 , further comprising upper and lower belt deflections, wherein the three-point seat belt is guided about the upper and lower belt deflections, the lower belt deflection being activated when the three-point seat belt is tightened.  
   
   
       34 . The child seat as claimed in  claim 17 , further comprising a lower transverse strut, wherein the lower belt deflection is designed as a clip which is mounted on the lower transverse strut.  
   
   
       35 . The child seat as claimed in  claim 17 , wherein the upper belt deflection is designed as an upper transverse strut.  
   
   
       36 . The child seat as claimed in  claim 18 , further comprising two side cheeks, wherein the upper transverse strut is connected to the lower transverse strut by the two side cheeks.  
   
   
       37 . The child seat as claimed in  claim 17 , wherein the first end of the belt strap is fastened to the clip.  
   
   
       38 . The child seat as claimed in  claim 17 , further comprising a back rest, wherein the belt system comprises a harness belt having a Y-distributor provided in the back rest.  
   
   
       39 . The child seat as claimed in  claim 22 , wherein the second end of the belt strap is fastened to the Y-distributor.  
   
   
       40 . The child seat as claimed in  claim 23 , wherein the belt strap is guided via deflecting bars.  
   
   
       41 . The child seat as claimed in  claim 24 , wherein the belt strap is guided via a tensioning pulley which is held displaceably in a linear guide.  
   
   
       42 . The child seat as claimed in  claim 25 , wherein the tensioning pulley is connected to a latching device of the belt system via a second belt strap.  
   
   
       43 . The child seat as claimed in  claim 17 , further comprising a force-limiting system for limiting a belt force.  
   
   
       44 . The child seat as claimed in  claim 27 , wherein the force-limiting threshold for the belt force is dependent on the belt length or belt position set.  
   
   
       45 . The child seat as claimed in  claim 17 , wherein a fastening system is provided with which the child seat is fastened to the supporting structure of the vehicle.