Ball chair

Abstract

A ball chair may comprise a chair frame, a ball body and an adjusting unit. The chair frame has a connecting base and a legs base, and a supporting column formed therebetween is configured to achieve a telescopic action thereby adjusting a height of the ball chair. The connecting base is formed in a concave shape to form a housing space therein, and an annular frame is formed at an upper end of the connecting base. The ball body is configured to be coupled on the connecting base of the chair frame, and the annular frame is configured to couple with an outer periphery of the ball body thereby limiting a position thereof. As a result, the ball chair is suitable for different statures of users and enables the users to sit thereon for training or rehabilitation.

What is claimed is: 
     
       1. A ball chair comprising:
 a chair frame having a connecting base and a legs base, and a supporting column which is formed therebetween and configured to achieve a telescopic action; the connecting base formed in a concave shape to form a housing space therein, and an annular frame formed at an upper end of the connecting base; and 
 a ball body configured to couple on the connecting base of the chair frame, and the annular frame configured to couple with an outer periphery of the ball body to limit a position thereof, 
 wherein a first connecting slot is formed at a central bottom portion of the connecting base, the first connecting slot having an inner wall with longitudinal extents from a first end to a second end, and the first connecting slot is pivotally connected to an upper end of the supporting column; a metal ring is coupled with an the inner wall of the first connecting slot and entirely disposed between the first end and the second end of the first connecting slot, and at least an opening formed at a bottom portion of the connecting base adjacent to the first connecting slot is configured to enable an adjusting unit to install therein; and the supporting column has an abutting portion formed at the upper end thereof, and the adjusting unit is configured to press the abutting portion of the supporting column to achieve the telescopic action. 
 
     
     
       2. The ball chair of  claim 1 , wherein a cap having a lower opening is configured to cover the ball body from top to bottom and to engage with the connecting base. 
     
     
       3. The ball chair of  claim 2 , wherein a bottom shell is disposed from bottom to top to couple with the bottom portion of the connecting base and covers a lower portion of the cap; and a bottom portion of the bottom shell has a second connecting slot which is communicated with the first connecting slot of the connecting base. 
     
     
       4. The ball chair of  claim 3 , wherein at least a through hole is formed at a lateral side of the bottom shell, and the adjusting unit is configured to pass through the through hole to connect to the connecting base. 
     
     
       5. The ball chair of  claim 2 , wherein the connecting base has a plurality of first slots formed at an outer wall thereof, and each of the plurality of first slots comprises a hook member; a lower edge of the cap around the lower opening has a plurality of hook rings; and each of the plurality of hook rings is configured to be engaged with the hook member of a respective first slot of the plurality of first slots located at a corresponding position, thus securing a position of the cap. 
     
     
       6. The ball chair of  claim 1 , wherein the connecting base and the annular frame are formed integrally. 
     
     
       7. The ball chair of  claim 1 , wherein a plurality of engaging slots evenly located inside the housing space of the connecting base, and a plurality of engaging members respectively protrude from an inner wall of the annular frame toward a bottom end thereof; and through engaging the plurality of engaging members with the plurality of engaging slots, the annular frame is configured to be secured on the upper end of the connecting base. 
     
     
       8. The ball chair of  claim 1 , wherein the adjusting unit formed in a shank shape and has an end which is inserted into the at least one opening to pivotally connect with the connecting base, and the end of the adjusting unit extended to an upper end of the first connecting slot is configured to couple with the abutting portion of the supporting column; and a cover is coupled with a bottom portion of the housing space, thereby limiting a position of the adjusting unit. 
     
     
       9. The ball chair of  claim 1 , wherein the at least one opening of the bottom portion of the connecting base comprises two openings which are symmetrically located adjacent to the first connecting slot; the adjusting unit has an annular loop, and an inner periphery thereof has at least two connecting rods located at two corresponding positions; each of the two connecting rods comprises an inner edge which is received in an interior space of the connecting base through a corresponding opening of the two openings, and a pressing board is configured to connect with the two connecting rods and to abut against the abutting portion of the supporting column; and the cover is coupled with the bottom portion of the housing space, thereby limiting positions of the two connecting rods and the pressing board. 
     
     
       10. A ball chair comprising:
 a frame defining a concave space configured to accept a ball body, the frame comprising a connecting base, a central region of a bottom portion of the connecting base comprising a first connecting slot with an inner wall having longitudinal extents from a first end to a second end;   a legs base;   a telescopically adjustable supporting column disposed between the connecting base and the legs base to adjustably change a distance between the connecting base and the legs base, the supporting column comprising an abutting portion for adjusting a height of the supporting column, an upper end of the supporting column pivotally engaged with the first connecting slot;   a metal ring coupled with the inner wall of the first connecting slot and entirely disposed between the first end and the second end of the first connecting slot, the supporting column pivotally passing through the metal ring; and   an adjusting unit coupled to the connecting base and configured to engage the abutting portion of the supporting column to selectively telescopically adjust the height of the supporting column.    
     
     
       11. The ball chair of claim 10 wherein the connecting base is concave and an annular frame portion is coupled to an upper end of the connecting base and configured to couple with an outer periphery of the ball body.  
     
     
       12. The ball chair of claim 11, wherein the annular frame portion is connected to the connecting base by way of a plurality of slots and respective engaging members that engage with the slots.  
     
     
       13. The ball chair of claim 10 wherein an opening is defined in the connecting base, the adjusting unit passing through the opening, the adjusting unit pivotally engaging with the connecting base, and an end of the adjusting unit engages the abutting portion of the supporting column.  
     
     
       14. The ball chair of claim 10, wherein:
 at least two openings are symmetrically defined in the connecting base;   the adjusting unit comprises an annular loop, and at least two connecting rods are coupled to the annular loop and respectively pass through the at least two openings;   a pressing board is disposed in the connecting base to engage the abutting portion of the supporting column and is coupled to the at least two connecting rods; and   a cover is coupled to the connecting base, an end of each connecting rod sandwiched between the pressing board and the cover.    
     
     
       15. The ball chair of claim 10 further comprising a bottom shell coupled to the connecting base, a bottom portion of the bottom shell comprising a second connecting slot in communication with the first connecting slot of the connecting base.  
     
     
       16. The ball chair of claim 10 further comprising a cap, the cap configured to cover at least a portion of the ball body, the cap removably couped to the frame.  
     
     
       17. The ball chair of claim 16, wherein:
 the frame comprises a plurality hook members; and   the cap comprises a plurality hook rings respectively configured to engage with the hook members.