Toy helicopter and balancing device therefor

Abstract

A toy helicopter configured to enhance a lateral stability by eliminating quickly a lateral tilt of a fuselage to restore its normal state includes a fuselage having a main body portion, a main rotor disposed above the main body portion and a balancing device fixed to an upper portion of the main body portion, the balancing device includes a long balance rod extending laterally across the fuselage, the balance rod has a protuberant portion at each end thereof and is allowed to oscillate so as to be held horizontal even though the fuselage is caused to tilt, and the balance rod is supported at a central portion thereof by a support portion.

What is claimed is: 
     
         1 . A toy helicopter comprising:
 a fuselage comprising a main body portion; and   a balancing device which is fixed to the main body portion,   wherein the balancing device comprises a long balance rod which is provided so as to extend laterally across the fuselage, and   wherein the balance rod has a protuberant portion at each end thereof and is provided on the fuselage so as to oscillate.   
     
     
         2 . The toy helicopter according to  claim 1 , wherein the balance rod can oscillate up and down at the left and right ends thereof, can be held horizontal even though the fuselage is caused to tilt to the left or right and is provided on an upper portion of the main body portion. 
     
     
         3 . The toy helicopter according to  claim 1 , comprising:
 a main rotor which is disposed above the main body portion, wherein the main rotor has an upper rotor and a lower rotor, and the upper rotor and the lower rotor rotate in opposite directions.   
     
     
         4 . The toy helicopter according to  claim 2 , comprising:
 a main rotor which is disposed above the main body portion, wherein the main rotor has an upper rotor and a lower rotor, and the upper rotor and the lower rotor rotate in opposite directions.   
     
     
         5 . The toy helicopter according to  claim 3 , wherein the upper rotor can vary a pitch angle of a blade and has a stabilizer above or below the upper rotor, and the pitch angle of the blade of the upper rotor can be controlled by the stabilizer. 
     
     
         6 . The toy helicopter according to  claim 4 , wherein the upper rotor can vary a pitch angle of a blade and has a stabilizer above or below the upper rotor, and the pitch angle of the blade of the upper rotor can be controlled by the stabilizer. 
     
     
         7 . The toy helicopter according to  claim 3 , wherein the fuselage has a rear rotor which rotates in a horizontal plane to the rear of the main body portion. 
     
     
         8 . The toy helicopter according to  claim 4 , wherein the fuselage has a rear rotor which rotates in a horizontal plane to the rear of the main body portion. 
     
     
         9 . The toy helicopter according to  claim 5 , wherein the fuselage has a rear rotor which rotates in a horizontal plane to the rear of the main body portion. 
     
     
         10 . The toy helicopter according to  claim 6 , wherein the fuselage has a rear rotor which rotates in a horizontal plane to the rear of the main body portion. 
     
     
         11 . The toy helicopter according to  claim 1 , wherein the balance rod has a length which is almost equal to a longitudinal length of the fuselage or is longer than the longitudinal length of the fuselage. 
     
     
         12 . A balancing device for a toy helicopter, comprising:
 a support main body portion having a flat fixing plate; and   an oscillating support portion which can oscillate relative to the support main body portion,   wherein a long balance rod having a protuberant portion at each end thereof is supported at a central portion thereof by the oscillating support portion, and the balance rod is attached to the support main body portion so as to oscillate.   
     
     
         13 . The balancing device for a toy helicopter according to  claim 12 ,
 wherein the support main body portion has a front support plate and a rear support plate which are provided on the fixing plate so as to rise parallel to each other therefrom,   wherein a rod support plate is provided between the front support plate and the rear support plate as the oscillating support portion,   wherein both front and rear ends of a support pin which supports the rod support plate in a position lying near an upper end thereof are attached to the front support plate in a position lying near an upper end thereof and the rear support plate in a position lying near an upper end thereof, respectively, so as to allow a lower end of the rod support plate to oscillate sideways relative to the support main body portion, and   wherein the balance rod is fixed to the lower end of the rod support plate, and the balance rod is suspended therefrom.   
     
     
         14 . The balancing device for a toy helicopter according to  claim 12 , wherein the balance rod has a curved shape in which the ends are situated lower than a center thereof. 
     
     
         15 . The balancing device for a toy helicopter according to  claim 13 , wherein the balance rod has a curved shape in which the ends are situated lower than a center thereof. 
     
     
         16 . The balancing device for a toy helicopter according to  claim 12 , wherein a rod main body of the balance rod is an aluminum pipe or a rod-like body of aluminum. 
     
     
         17 . The balancing device for a toy helicopter according to  claim 12 , wherein the protuberant portion is a resin pipe whose diameter is thicker than a diameter of the rod main body of the balance rod, and an axial direction of the resin pipe stays horizontal while intersecting an axial direction of an end portion of the rod main body. 
     
     
         18 . The balancing device for a toy helicopter according to Claim  13 , wherein the protuberant portion is a resin pipe whose diameter is thicker than a diameter of the rod main body of the balance rod, and an axial direction of the resin pipe stays horizontal while intersecting an axial direction of an end portion of the rod main body. 
     
     
         19 . The balancing device for a toy helicopter according to  claim 14 , wherein the protuberant portion is a resin pipe whose diameter is thicker than a diameter of the rod main body of the balance rod, and an axial direction of the resin pipe stays horizontal while intersecting an axial direction of an end portion of the rod main body. 
     
     
         20 . The balancing device for a toy helicopter according to  claim 15 , wherein the protuberant portion is a resin pipe whose diameter is thicker than a diameter of the rod main body of the balance rod, and an axial direction of the resin pipe stays horizontal while intersecting an axial direction of an end portion of the rod main body.