Ceiling fan

Abstract

A ceiling fan including a connecting fitting fixed to a ceiling, and a ceiling fan main body suspended from the connecting fitting via a suspension device. The ceiling fan main body includes a motor for rotating a plurality of blades attached in a horizontal direction, a shaft protruding to an upper part of the motor, and a joint portion fixed on an upper part of the shaft. The suspension device includes a first connecting portion capable of being movably mounted on the connecting fitting, and a second connecting portion located in a lower part of the first connecting portion. The joint portion is movably mounted on the second connecting portion.

1 . A ceiling fan comprising:
 a connecting fitting fixed to a ceiling; and   a ceiling fan main body suspended from the connecting fitting via a suspension device,   wherein the ceiling fan main body comprises:
 a motor for rotating a plurality of blades attached in a horizontal direction; 
 a shaft protruding to an upper part of the motor, and 
 a joint portion fixed on an upper part of the shaft, 
   the suspension device comprises:
 a first connecting portion capable of being movably mounted on the connecting fitting; and 
 a second connecting portion located under a lower part of the first connecting portion, and 
 the joint portion is movably mounted on the second connecting portion. 
   
     
     
         2 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis, and when coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a horizontal axis connecting portion rotatable in the direction of the X-axis as a rotation axis, and the second connecting portion is a horizontal axis connecting portion rotatable in the direction of the Z-axis as a rotation axis.   
     
     
         3 . The ceiling fan of  claim 2 ,
 wherein the connecting fitting has a hook shape,   the first connecting portion includes a columnar axis which is fixed in the horizontal direction and which the connecting fitting is hooked over,   the joint portion has a hole, and   the second connecting portion includes a columnar axis which is fixed in the horizontal direction and which is hooked through the hole of the joint portion.   
     
     
         4 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis, and when coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a horizontal axis connecting portion rotatable in the direction of the X-axis as a rotation axis, and the second connecting portion is a hanger that holds a horizontal plane axis connecting portion rotatable around a rotation axis on the horizontal plane.   
     
     
         5 . The ceiling fan of  claim 4 ,
 wherein the connecting fitting has a hook shape,   the first connecting portion includes a columnar axis which is fixed in the horizontal direction and which the connecting fitting is hooked over,   the joint portion is a ball joint having a substantially hemispherical-shaped surface with a groove provided thereon,   the second connecting portion has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove.   
     
     
         6 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis and coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a horizontal plane axis connecting portion rotatable around a rotation axis on the horizontal plane, and the second connecting portion is a horizontal axis connecting portion rotatable in the direction of the X-axis as a rotation axis.   
     
     
         7 . The ceiling fan of  claim 6 ,
 wherein the first connecting portion is a ball joint fixed to the shaft and having a substantially hemispherical-shaped surface with a groove provided thereon,   the connecting fitting has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove,   the joint portion is a hook provided with a hole, and   the second connecting portion includes a columnar axis hooked through the hole and fixed in the horizontal direction.   
     
     
         8 . The ceiling fan of  claim 3 ,
 wherein the columnar axis has a pulley.   
     
     
         9 . The ceiling fan of  claim 8 ,
 wherein the pulley is made of rubber.   
     
     
         10 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis and coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a horizontal plane axis connecting portion rotatable around a rotation axis on the horizontal plane, and the second connecting portion is a hanger holding a horizontal plane axis connecting portion rotatable around a rotation axis on the horizontal plane.   
     
     
         11 . The ceiling fan of  claim 10 ,
 wherein the first connecting portion is a ball joint fixed to the shaft and having a substantially hemispherical-shaped surface with a groove provided thereon,   the connecting fitting has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove,   the joint portion is a ball joint having a substantially hemispherical-shaped surface with a groove provided thereon, and   the second connecting portion has a bowl shape movably holding a ball joint of the joint portion and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove.   
     
     
         12 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis and coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a three-dimensional axis connecting portion rotatable around rotation axes in all directions in three dimensions, and the second connecting portion is a hanger holding a horizontal plane axis connecting portion rotatable around a rotation axis on the horizontal plane.   
     
     
         13 . The ceiling fan of  claim 12 ,
 wherein the first connecting portion is a ball joint fixed to the shaft and having a substantially hemispherical shape,   the connecting fitting has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass,   the joint portion is a ball joint having a substantially hemispherical-shaped surface with a groove provided thereon, and   the second connecting portion has a bowl shape movably holding a ball joint of the joint portion and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove.   
     
     
         14 . The ceiling fan of  claim 1 ,
 wherein in the suspension device, when a central axis of the shaft is defined as Y-axis and coordinates of a horizontal plane perpendicular to the Y-axis are defined as X-axis and Z-axis, the first connecting portion is a three-dimensional axis connecting portion rotatable around rotation axes in all directions in three dimensions, and the second connecting portion is a hanger holding a three-dimensional axis connecting portion having rotation axes in all directions in three dimensions.   
     
     
         15 . The ceiling fan of  claim 14 ,
 wherein the first connecting portion is a ball joint fixed to the shaft and having a substantially hemispherical shape,   the connecting fitting has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass,   the joint portion is a ball joint having a substantially hemispherical shape, and   the second connecting portion has a bowl shape movably holding a ball joint of the joint portion and including a notch portion through which the shaft is allowed to pass.   
     
     
         16 . The ceiling fan of  claim 5 , wherein the columnar axis has a pulley. 
     
     
         17 . The ceiling fan of  claim 7 , wherein the columnar axis has a pulley. 
     
     
         18 . A ceiling fan comprising:
 a connecting fitting fixed to a ceiling; and   a ceiling fan main body suspended from the connecting fitting via a suspension device,   wherein the ceiling fan main body comprises:
 a motor for rotating a plurality of blades attached in a horizontal direction; 
 a shaft protruding from an upper part of the motor, and 
 a joint portion fixed on an upper part of the shaft, 
   the suspension device comprises:
 a first connecting portion displaceable substantially only in a first axial direction; and 
 a second connecting portion capable of rotating substantially only in a plane defined by the first axial direction and a second axial direction perpendicular to the first axial direction, 
   the joint portion is movably mounted on one of the first and the second connecting portions.   
     
     
         19 . The ceiling fan of  claim 18 , wherein
 the joint portion is a ball joint having a substantially hemispherical-shaped surface with a groove provided thereon,   the second connecting portion has a bowl shape movably holding the ball joint and including a notch portion through which the shaft is allowed to pass and a protrusion that can be inserted into the groove.