Abstract:
A rudder control assembly used in a boat comprises a control unit having a left control plate and a right control plate; a control unit having a left connecting unit and a right connecting unit; a front end of the control unit being connected to the left control plate and the right control plate; a rudder unit installed at a tail end of the boat; the rudder unit including a right shaft; a rudder body; a left extension plate, a right extension plate, a driving plate and a rudder; The right shaft is connected to the boat body and rotatable axially. A lower end of the right shaft is connected to the driving plate. The driving plate is connected to the left connecting unit and the right connecting unit. The left connecting unit and the right connecting unit are hard rods.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a rudder control assembly, wherein a rudder unit is installed at a manual controlled boat which is connected to a control unit through a connecting unit. The driver can control the control unit by the treading operation of legs. Thereby the rudder unit is driven by the connecting unit. The feature of the present invention is that the conventional soft ropes are removed and hard rods are used. The driving operation is performed by pushing backwards instead of the conventional pulling forwards. Thereby not only controlling the direction change of boat rudder, but also water flow below the boat can be informed to the driver. 
     BACKGROUND OF THE INVENTION 
     Most the prior art manual control boats are controlled through paddles instead of rudders. However in changing the direction of the boat, the paddles are used, but the paddle is operated at only one side of the boat so that the speed of the boat must be reduced and the gravitation center of the boat is displaced. 
     In another boat structure disclosed in U.S. Pat. No. 6,612,252, a boat has two treadles controlled by legs of the drivers for controlling the direction change of the rudder. Ropes are connected between the treadles and the rudders. In this example, the ropes are soft. They only have the function of changing the direction of rudder. However the water flow under the boat cannot be detected by drivers immediately. 
     SUMMARY OF THE INVENTION 
     Accordingly, the primary object of the present invention is to provide a rudder control assembly, wherein a rudder unit is installed at a manual controlled boat which is connected to a control unit through a connecting unit. The driver can control the control unit by the treading operation of legs. Thereby the rudder unit is driven by the connecting unit. The feature of the present invention is that the conventional soft ropes are removed and hard rods are used. The driving operation is performed by pushing backwards instead of the conventional pulling forwards. Thereby not only controlling the direction change of boat rudder, but also water flow below the boat can be informed to the driver. 
     A rudder control assembly used in a boat comprises a control unit having a left control plate and a right control plate; a control unit having a left connecting unit and a right connecting unit; a front end of the control unit being connected to the left control plate and the right control plate; a rudder unit installed at a tail end of the boat; the rudder unit including a right shaft; a rudder body; a left extension plate, a right extension plate, a driving plate and a rudder; The right shaft is connected to the body and rotatable axially. A lower end of the right shaft is connected to the driving plate. The driving plate is connected to the left connecting unit and the right connecting unit. The left connecting unit and the right connecting unit are hard rods. 
     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the present invention. 
         FIG. 2  is a schematic view of the present invention. 
         FIG. 3  is a top view of the present invention. 
         FIG. 4  shows the operation of the present invention. 
         FIG. 5  is a top view showing the operation of the present invention. 
         FIG. 6  is a schematic view showing that the boat moves transversally toward land and a water flows transversally below the boat. 
         FIG. 7  is a schematic view showing that the boat moves longitudinally toward land and a water flows transversally below the boat. 
         FIG. 8  is a top view of another embodiment of the present invention. 
         FIG. 9  is a top view of another embodiment of the present invention. 
         FIG. 10  is a lateral view of another embodiment of the present invention. 
         FIG. 11  is a schematic view showing that a rope is installed in a communicating tube. 
         FIG. 12  is a schematic view showing the operation of the rope in the communicating tube. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
     Referring to  FIGS. 1 ,  2 , and  3 , the preferred embodiment of the rudder control assembly of the present invention is illustrated. The rudder control assembly is installed in a boat  1 . The boat  1  has the following elements. 
     A boat body  2  is made of material capable of floating in water. Persons can carry the boat body  2  and floats upon water. The boat body  2  has a concave portion  20 . People can be in the concave portion  20 . Moreover the boat body  2  may contain a left concave portion  21 , a right concave portion  22  and a communicating tube  23 . 
     A control unit  3  includes a left control plate  31  and a right control plate  32 . The left control plate  31  is installed with a left shaft  33  and a left strip  35 . The right control plate  32  is installed with a right shaft  34  and a right strip  36 . The left control plate  31  is installed in the left concave portion  21  and the right control plate  32  is installed in the right concave portion  22 . 
     A connecting unit  4  includes a left connecting unit  41 , a right connecting unit  42 , and a rudder connecting unit  43 . The left connecting unit  41  has one end connecting to the left control plate  31 . The right connecting unit  42  has one end connecting to the right control plate  32 . The rudder connecting unit  43  inserts into the communicating tube  23  to further extend to a tail of the boat. 
     A rudder unit  5  is installed at the tail end of the boat. The rudder unit  5  includes a rotary shaft  51 , a rudder body  52 , a left extension plate  53 , a right extension plate  54 , a rudder  55 , and a driving plate  58 . The rotary shaft  51  is connected to the boat body  2  and moves axially. The rudder body  52  is installed to the upper side of the rotary shaft  51 . The left extension plate  53  and right extension plate  54  are installed at two sides of the rudder body  52 . The rudder  55  is connected between the left extension plate  53  and the right extension plate  54  through the pivotal shaft  56 . A distal end of the rudder connecting unit  43  is connected to the rudder  55 . 
     The feature of the present invention is that the left connecting unit  41  and the right connecting unit  42  are made of hard rods instead of soft ropes. The rods may be a straight rod or a bended rod. 
     By above structure, the left control plate  31  is connected to the rudder unit  5  through the left connecting unit  41 . The right control plate  32  is connected to the rudder unit  5  through the right connecting unit  42 . Therefore, referring to  FIGS. 4 and 5 , the driver can locate his (or her) legs upon the left control plate  31  by using the left strip  35  and upon the right control plate  32  by using the right strip  36 . By treading one of the left control plate  31  and the right control plate  32 , the orientation of the rudder unit  5  is controllable. The control is very easy and convenient. The feature is that if it is desired to turn left, the left leg treads and if it is desired to turn right, the right leg treads. The operation is easy. 
     Since the left connecting unit  41  and the right connecting unit  42  are made of hard rod. In operation, by the principle of the treading and push backwards, the direction of the rudder unit  5  is changed. Especially, when the rudder unit  5  encounters water flow, the state is transferred to the legs through the left connecting unit  41 , right connecting unit  42 , left control plate  31  and right control plate  32  and then to the brain of the driver. Thereby the user can know the state of water flow and control the boat. However the prior art cannot achieve the same effect. It must know that the water flow under the boat cannot be seen by eyes. In the present invention, by the rudder unit  5 , left connecting unit  41 , right connecting unit  42 , left control plate  31 , and right control plate  32 , states of water flow are transferred to the driver and then to the brain of the driver. The driver can react immediately. 
     The principle of the present invention will be described herein. Referring to  FIGS. 6 and 7 , the boat  1  travels towards the seashore  63 . A transversal reverse water flow  62  is below the boat. The energy of the water flow will cause that the rudder unit  5  to change direction (in this moment, the left control plate  31  and the right control plate  32  are not controlled to change direction). The driver can have the message from the left control plate  31  and the right control plate  32  and determines the control the direction (it is called as a tracing active control) so that the boat  1  can react the message immediately. Meanwhile, if the resistance force of the left control plate  31  or the right control plate  32  is adjusted (i.e., the react force of the rudder unit  5 ) to balance the longitudinal sea wave  61  so as to transversally move. Meanwhile, the rudder unit  5  will transfer the message to the brain (the brain can control the treadle and the rod). When moving transversally, the speed of the water flow is reduced, the rudder unit  5  will sense the acceleration and the variation of the speed. The pressure message will transfer to brain through the left connecting unit  41 , right control plate  32 , left control plate  31  and the right control plate  32 . Then the brain determines the optimum time for movement (the control is changed so that the boat  1  moves forwards). 
     Since in the prior art, the left connecting unit and the right connecting unit are rods which can absorb the react forces from the left connecting unit  41  and the right connecting unit  42 . If the driver determines not to move, the energy of the longitudinal sea wave  61  will reduce. The rudder unit  5  will release the absorbed energy so as to have an effect opposite to the longitudinal wave  61 . Thereby the boat  1  separates from the rear side. This function is called as the active control of sensing energy so that the boat  1  can response the state immediately. Moreover, since the direction of the boat  1  is changed, the boat  1  can travel steadily. 
     In the prior art, the driver do not care the water flow below the boat so that it is possible that the drive will tense up. If now a water flow is parallel to the sea wave, the driver cannot react the state of change of the movement reversed to the water flow. At this moment, the pressure message of water flow from the treadle is reversed to the direction for controlling the treadle. It is necessary to change direction to control the treadle by another leg. However the react is too slow to well control the boat. 
     Moreover in the present invention, the hard rods are used instead of the conventional soft ropes. If transversal water flows below the boat, the water flow will make the rudder to change direction (the orientations of the left control plate and the right control plate are not changed). The driver can receive the response from the control plates and can determine the direction to be changed. The feature is that the driving state is changed to pull forwards from pushing backwards. Thereby when the treadle response the state of water flow, the correct moving message can be provided to the driver so that the driver can well control the direction of boat (when the boat move rightwards along the direction of water flow, the right control plate will move forwards. The driver only needs to tread the control plate by the right leg. The boat is safe). The driver can control the boat freely. 
     Referring to  FIG. 8 , the tail of the boat  1  has another shape. 
     Referring to  FIGS. 9 and 10 , another embodiment of the present invention is illustrated. It is illustrated that the left connecting unit  41  and the right connecting unit  42  have slightly curved shape. 
       FIG. 11  shows that in the communicating tube  23 , a first rope  45  and a second rope  46  are installed therein. The first rope  45  and second rope  46  are connected as a U shape. A distal end thereof is connected to the rudder unit  5  and around the pivotal shaft  56 . A retaining portion  47  serves to fix the structure. An elastic body  461  is installed at the second rope  46 . Thereby when the first rope  45  is pulled (referring to  FIG. 12 ), the pivotal shaft  56  is driven, and the rudder  55  is lifted. The function is that when the boat  1  moves in a shallow area with reefs therein. The rudder  55  will not be destroyed. When the first rope  45  is not pulled upwards, the elastic body  461  of the second rope  46  is used to pull the rudder  55  downwards to be at a state illustrated in  FIG. 11 . 
     The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.