Booster seat

Abstract

Booster for raising the seat height of a chair includes an extendable frame with a seat and backrest attached thereto, at least one handle provided on the frame for placement over the backrest. The frame has two telescopic tubes, each formed by at least two telescopic elements that slide into one another, respectively an inner element and an outer element. A brake is provided to fasten the telescopic elements in a certain position with respect to one another that is continuously adjustable, and at least two elements have an asymmetric cross-section with a smaller width than length measured in two directions transverse to one another. The brake acts as a stop rotatably affixed to an end of the inner element but axially locked with respect thereto, and is rotatable between a position in which it is clamped in the outer element and a position in which it is separate therefrom.

1 . Booster seat for raising the seat height of a chair ( 28 ) or similar, characterised in that the booster seat ( 1 ) essentially comprises an extendable frame ( 2 ) with a seat ( 3 ) and backrest ( 4 ) attached thereto, whereby at least one handle ( 11 ), handgrip or similar is provided on the frame ( 2 ) that can be placed over the backrest ( 30 ) of the chair ( 28 ), whereby the frame ( 2 ) is formed by two telescopic tubes ( 5 ) that are each formed by at least two telescopic elements ( 7 ,  8 ) that slide into one another, respectively an inner element ( 7 ) and an outer element ( 8 ), whereby a brake ( 13 ) is provided to fasten the telescopic elements ( 7 ,  8 ) in a certain position with respect one another that is continuously adjustable, and whereby at least two elements ( 7 ,  8 ) have an asymmetric cross-section with a smaller width (A, B) than length (C, D) measured in two directions (Y-Y′, Z-Z′) transverse to one another, and whereby the brake ( 13 ) is constructed as a stop ( 14 ) that is rotatably affixed to an end ( 9 ) of the inner element ( 7 ) but is axially locked with respect to this element ( 7 ), whereby the dimensions are such that it is rotatable between a position in which it is clamped in the outer element ( 8 ) and a position in which it is separate from the outer element ( 8 ) and thus can be slid into the outer element ( 8 ) together with the inner element ( 7 ). 
     
     
         2 . Booster seat according to  claim 1 , characterised in that the stop ( 14 ) is oval shaped with a minor axis (E) and a major axis (F) along two radial directions (Y-Y′, Z-Z′), whereby the major axis (F) of the oval-shaped stop ( 14 ) is at least as large as the width (B) of the cross-section of the outer element ( 8 ) and smaller than the length (D), whereby the stop ( 14 ) is rotatable around an axis parallel to the axial direction (X-X′) between a clamped position whereby the major axis (F) of the oval-shaped stop ( 14 ) is oriented along the width (B) of the cross-section of the outer element ( 8 ) and a loose position whereby the major axis (F) of the stop ( 14 ) is oriented along the length (D) of the cross-section of the outer element ( 8 ). 
     
     
         3 . Booster seat according to  claim 1 , characterised in that at least one handle ( 11 ), handgrip or similar is affixed rotatably to the frame ( 2 ) at the other end ( 12 ) of the inner element ( 7 ) and that the stop ( 14 ) is coupled to the handle ( 11 ) so that a rotation of the handle ( 11 ) enables a rotation of the stop ( 14 ). 
     
     
         4 . Booster seat according to  claim 3 , characterised in that the handle ( 11 ) is connected to a rod ( 15 ) or similar that extends in the inner element ( 7 ) and which is connected to the stop ( 14 ) in such a way that a rotation of the handle ( 11 ) causes a rotation of the rod ( 15 ) and the stop ( 14 ). 
     
     
         5 . Booster seat according to  claim 3 , characterised in that the handle ( 11 ) is rotatable between a position in which the handle ( 11 ) is in the plane of the frame ( 2 ) whereby the brake ( 13 ) is in the loose position, and a position in which the handle ( 11 ) is perpendicular to the plane of the frame ( 2 ) whereby the brake ( 13 ) is in the clamped position. 
     
     
         6 . Booster seat according to  claim 1 , characterised in that the stop ( 14 ) is made of rubber or another elastically deformable material. 
     
     
         7 . Booster seat according to  claim 1 , characterised in that the elements ( 7 ,  8 ) have an approximately rectangular cross-section. 
     
     
         8 . Booster seat according to  claim 1 , characterised in that the seat ( 3 ) and/or the backrest ( 4 ) are fastened to the outer element ( 8 ) by means of two supports ( 16 ) that are affixed in a slidable way over the telescopic tubes ( 5 ) of the frame ( 2 ), whereby the supports ( 16 ) are provided with means ( 19 ) to be able to lock the supports ( 16 ) in a certain position with respect to the frame ( 2 ). 
     
     
         9 . Booster seat according to  claim 8 , characterised in that the aforementioned means ( 19 ) are formed by a movable pin ( 20 ) that can be moved between a position whereby the pin ( 20 ) is held in cutaways ( 10 ) of the elements ( 7 ,  8 ) of the frame ( 2 ) provided to this end in order to lock the support ( 16 ), and a position whereby the pin ( 20 ) is pulled back out of the cutaways. 
     
     
         10 . Booster seat according to  claim 8 , characterised in that the supports ( 16 ) are constructed as a tube that can slide over the telescopic tubes ( 5 ) of the frame ( 2 ). 
     
     
         11 . Booster seat according to  claim 1 , characterised in that the frame ( 2 ) can be placed at an angle (H) to the seat ( 29 ) of the chair ( 28 ) by placing at least one handle ( 11 ), handgrip or similar over the backrest ( 30 ) of the chair ( 28 ). 
     
     
         12 . Booster seat according to  claim 1 , characterised in that the booster seat ( 1 ) is provided with fastening belts ( 26 ) that enable the booster seat ( 1 ) to be fastened to the seat ( 29 ) and/or backrest ( 30 ) of a chair ( 28 ) or similar. 
     
     
         13 . Booster seat according to  claim 1 , characterised in that the booster seat ( 1 ) is provided with fastening means to secure a person, who is in the booster seat ( 1 ), in the booster seat ( 1 ). 
     
     
         14 . Booster seat according to  claim 1 , characterised in that the seat ( 3 ) and if need be the backrest ( 4 ) can be folded up to or approximately to the plane of the extendable frame ( 2 ) by being fastened in a hingeable way to the frame ( 2 ), and/or that the inner tubes ( 7 ) can be slid completely or practically completely into the outer tubes ( 8 ). 
     
     
         15 . Booster seat according to  claim 2 , characterised in that at least one handle ( 11 ), handgrip or similar is affixed rotatably to the frame ( 2 ) at the other end ( 12 ) of the inner element ( 7 ) and that the stop ( 14 ) is coupled to the handle ( 11 ) so that a rotation of the handle ( 11 ) enables a rotation of the stop ( 14 ). 
     
     
         16 . Booster seat according to  claim 4 , characterised in that the handle ( 11 ) is rotatable between a position in which the handle ( 11 ) is in the plane of the frame ( 2 ) whereby the brake ( 13 ) is in the loose position, and a position in which the handle ( 11 ) is perpendicular to the plane of the frame ( 2 ) whereby the brake ( 13 ) is in the clamped position. 
     
     
         17 . Booster seat according to  claim 9 , characterised in that the supports ( 16 ) are constructed as a tube that can slide over the telescopic tubes ( 5 ) of the frame ( 2 ).