Patent Publication Number: US-11376517-B2

Title: Rotary displacement structure of fun device

Description:
FIELD OF THE INVENTION 
     The present invention relates to an interesting therapeutic device, and more particularly to an interesting therapeutic device having an interior rotary displacement unit that can rotate while rising or descending after the interesting therapeutic device is overturned. 
     BACKGROUND OF THE INVENTION 
     There are transparent pens or decorative devices on the market, and their interior space is filled with a fluid. A decoration is provided in the space. The decoration has buoyancy or gravity. When the pen is upright under normal conditions, the decoration will float at the top of the space. When the pen is overturned, initially, the decoration will be at the bottom of the space, and then it will slowly move towards the top of the space because of its buoyancy or gravity; thereby, an interesting effect can be achieved. This kind of interesting pen has existed for at least several decades. Although it is still fun, it is difficult to attract consumers&#39; attention if it is no longer innovative. 
     SUMMARY OF THE INVENTION 
     In order to achieve creative movement and visual effects of the aforementioned pen, the primary object of the present invention is to provide a rotary displacement structure of a fun device, comprising a rotary displacement unit therein. Particularly, the rotary displacement unit can rotate when the rotary displacement unit rises or descends. In this way, the rotary displacement unit can be rotated while rising or descending. If the surface of the rotary displacement unit is printed with characters, lines, color blocks or patterns, the visual effect will be completely different from the prior art, which can effectively attract consumers&#39; attention, increase the desire to purchase and greatly enhance the healing effect. 
     In order to achieve the aforesaid object, a rotary displacement structure of a fun device is provided. The rotary displacement structure of the fun device comprises a container body. The container body includes an outer tube. The outer tube is a hollow and closed tube and has a space therein. A fluid is provided in the space. A rotary displacement unit is disposed in the space. The rotary displacement unit includes at least one blade assembly. The rotary displacement unit is movable in the space through buoyancy or gravity. 
     In a preferred embodiment, the container body is a transparent container body. 
     In a preferred embodiment, the rotary displacement unit has buoyancy or gravity and includes an inner tube. The inner tube has an air chamber therein, or the specific weight of the rotary displacement unit is relatively less than that of the fluid in the space so that buoyancy can be obtained; alternatively, an appropriate weight is added to the rotary displacement unit in advance to obtain its gravity. As a result, the rotary displacement unit can automatically rise or descend in the fluid in the space. 
     In a preferred embodiment, the blade assembly includes a plurality of blades. A surface of each blade and a horizontal plane are arranged at an acute angle. 
     In a preferred embodiment, either end of the rotary displacement unit is provided with the blade assembly. 
     In a preferred embodiment, a surface of the rotary displacement unit is printed with characters, lines, color blocks or patterns. 
     In a preferred embodiment, the container body is a pen. Opposing two ends of the container body are provided with a cover and a pen point, respectively. 
     In a preferred embodiment, the container body is a decoration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
         FIG. 1  is an exploded view of the present invention; 
         FIG. 2  is a perspective view of the present invention; 
         FIG. 3  is a cross-sectional view of the present invention; 
         FIG. 4  is a schematic view of the present invention to be overturned; and 
         FIG. 5  is a schematic view of the present invention after being overturned, illustrating that the rotary displacement unit floats and rotates upward. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     As shown in  FIG. 1  through  FIG. 3 , the present invention discloses a rotary displacement structure of a fun device, comprising a container body  1 . The container body  1  includes an outer tube  11 . The outer tube  11  is a hollow and closed tube, and has a space  10  therein. A fluid  14  is provided in the space  10 . A rotary displacement unit  2  is provided in the space  10 . The rotary displacement unit  2  includes a tube  21  a blade assembly  22 . The rotary displacement unit  2  is movable in the space  10 . The container body  1  is a transparent container body. The rotary displacement unit  2  has an air chamber  20  in the tube  21 , or the specific weight of the rotary displacement unit  2  is relatively less than that of the fluid  14  in the space  10  so that buoyancy can be obtained; alternatively, an appropriate weight is added to the rotary displacement unit  2  in advance to obtain its gravity. As a result, the rotary displacement unit  2  can automatically rise or descend in the fluid  14  in the space  10 . The blade assembly  22  includes a plurality of blades  221 . A slight angle is defined between the surface of each blade  221  and the horizontal plane. Preferably, either end of the rotary displacement unit  2  is provided with the blade assembly  22 . The surface of the rotary displacement unit  2  is printed with characters, lines, color blocks or patterns. The container body is a pen. A cover  13  and a pen point  12  are provided at opposing two ends of the container body  1 , respectively. 
     As shown in  FIG. 3 , the rotary displacement unit  2  has buoyancy, as an example. Since the rotary displacement unit  2  has buoyancy, the rotary displacement unit  2  floats on the top of the fluid  14  in the space  10  in normal conditions. 
     As shown in  FIG. 4 , when the container body  1  is quickly overturned manually, the rotary displacement unit  2  originally located at the top of the fluid  14  in the space  10  will become at the bottom of the fluid  14 . Because the rotary displacement unit  2  has buoyancy, the rotary displacement unit  2  will slowly rise upward (as shown in  FIG. 5 ). At the same time, the rotary displacement unit  2  will rotate through the blade assembly  22 . Therefore, the rotary displacement unit  2  will slowly rotate and float upward until it reaches the top of the fluid  14  in the space  10 . Moreover, if the surface of the rotary displacement unit  2  are printed with various characters, lines, color blocks or patterns, the visual effect is different from the prior art. 
     If the rotary displacement unit  2  is pre-set with a proper weight, that is, the specific weight of the rotary displacement unit  2  is relatively greater than that of the fluid  14 , the rotary displacement unit  2  rotates while the fluid  14  descends. 
     Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.