Abstract:
A cultivator includes an operation rod and at least one fixing seat. The operation rod includes a predetermined number of detachable rotary wheels at a predetermined position. The fixing seat is pivotally connected to the operation rod. A predetermined number of cultivating claws are pivoted on a circumferential portion of the fixing seat at a predetermined angle and position after being assembled. Through the rotary wheels or the cultivating claws, the cultivator is turned left and right or back and forth to loosen soil.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a cultivator. 
     2. Description of the Prior Art 
     A conventional gardening tool, such as a cultivator, a shovel, a digger or the like, provides a different function and use. Each tool has a specific use to provide a different effect. 
     However, each conventional gardening tool only provides a single effect. If the user needs to use different tools, he/she has to purchase various tools and to change the tools frequently. It is very inconvenient and ineffective to carry so many tools at a time. 
     SUMMARY OF THE INVENTION 
     The present invention is to provide a cultivator. The cultivator includes an operation rod and at least one fixing seat. The operation rod includes a predetermined number of detachable rotary wheels at a predetermined position. The fixing seat is pivotally connected to the operation rod. A predetermined number of cultivating claws are pivoted on a circumferential portion of the fixing seat at a predetermined angle and position after being assembled. 
     Through the change of the rotary wheels or the cultivating claws, the cultivating claws of the cultivator are first turned to loosen the soil partially, and then the rotary wheels are used to loosen the soil linearly. The present invention provides different effects to loosen the soil with a single device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view according to a preferred embodiment of the present invention; 
         FIG. 2  is a partially exploded view according to the preferred embodiment of the present invention; 
         FIG. 3  is a schematic view to show rotary wheels when in use according to the preferred embodiment of the present invention; 
         FIG. 4  is a schematic view to show cultivating claws when in use according to the preferred embodiment of the present invention; 
         FIG. 5  is a schematic view to show the operation of operation handles according to the preferred embodiment of the present invention; 
         FIG. 6  is a schematic view to show the connection of the cultivating claw according to the preferred embodiment of the present invention; 
         FIG. 7  is a perspective view showing another embodiment of the cultivating claw; 
         FIG. 8  is a side view of  FIG. 7 , and 
         FIG. 9  is a schematic view of  FIG. 7  when in use. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
     As shown in  FIG. 1  and  FIG. 2 , a cultivator according to a preferred embodiment of the present invention comprises an operation rod  10 , a fixing seat  30 , and a top seat  50 . 
     The operation rod  10  is provided with three sockets  11  at one end thereof. Each of the sockets  11  has an insertion hole  111 . One side of the socket  11  is provided with a positioning member  112  which is a screw in this embodiment. Each socket  11  is connected with a rotary wheel  20 . The rotary wheel  20  has a shaft  21 . The shaft  21  has a coupling portion  211  at one end thereof to be secured in the insertion hole  111 . The coupling portion  211  has a coupling hole  212  corresponding to the positioning member  112 . Another end of the shaft  21  is pivotally connected with two rollers  22  opposite to the coupling portion  211 . Each of the rollers  22  has radial insertion rods  221  thereon. The rollers  22  are obliquely pivoted to the shaft  21  to be interlaced with each other. 
     The fixing seat  30  is connected to the operation rod  10 , which can be integrally connected with the sockets  11  or be separately provided. The fixing seat  30  comprises four holders  31  on a circumferential portion of the fixing seat  30 . Each of the holders  31  is composed of two spaced positioning boards  311 . Each of the holders  31  is connected with a cultivating claw  40 . The cultivating claw  40  has a pin hole  41  for insertion of a pin  32 , so that the cultivating claw  40  is pivotally connected to the holder  31  with the pin  32  as a pivot. The holder  31  is provided with a positioning member  33  beside the pin  32 . In this embodiment, the positioning member  33  is a screw. The cultivating claw  40  has a positioning hole  42  beside the pin hole  41 . The positioning hole  42  is located corresponding to the positioning member  33 . 
     The top seat  50  is connected to another end of the operation rod  10  opposite to the sockets  11 . The top seat  50  has a top board  51  at two sides thereof, and two operation handles  52  are pivotally connected on the top seat  50 . The top board  51  has a horizontal positioning hole  511  and a vertical positioning hole  512  corresponding to each of the operation handles  52 . A positioning block  521  is provided in each of the operation handles  52 . The positioning block  521  can be confined in the horizontal positioning hole  511  or the vertical positioning hole  512  to change the operation handles  52  at a horizontal or vertical position. 
     In order to understand the feature, the technical means and the expected effects of the present invention, the following description is to describe the use of the present invention. 
     Referring to  FIG. 3 , when the rotary wheels  20  are in use, the cultivating claws  40  are turned toward the operation rod  10 . Each rotary wheel  20  is coupled to a corresponding socket  11 , such that the rotary wheel  20  can be used to loosen the soil.  FIG. 4  is to show the cultivating claws  40  when in use. First, the positioning member  112  is unscrewed to disengage the rotary wheel  20  from the insertion hole  111 , and then the positioning member  33  is unscrewed to disengage from the positioning hole  42 , such that the cultivating claw  40  is rotatable with respect to the holder  31 . The cultivating claw  40  is turned downward to be away from the operation rod  10 , and then the positioning member  33  is screwed to engage with the positioning hole  42  of the cultivating claw  40  to secure the cultivating claw  40  for use. The released rotary wheels  20  can be received in accommodating troughs  34  disposed on the fixing seat  30 . Referring to  FIG. 5 , when the rotary wheels  20  are used, the operation handles  52  are arranged vertically. When the cultivating claws  40  are used, the operation handles  52  are arranged perpendicularly. The position of the operation handles  52  can be changed in accordance with different applied force ways. 
     Referring to  FIG. 6 , the cultivating claw  40  can be placed upward or downward on the holder  31 . When the cultivating claw  40  is in use, the cultivating claw  40  is turned downward to be located under the holder  31  with the positioning hole  42  engaging with the positioning member  33 . When the cultivating claw  40  is not in use, the cultivating claw  40  is turned upward to be secured on the holder  31 . 
       FIG. 7 ,  FIG. 8  and  FIG. 9  show another embodiment of the cultivating claw  40 . One side of the cultivating claw  40  is provided with a protruding block  43 . The protruding block  43  has two protrusions  431  at two sides thereof. When the cultivating claw  40  is coupled to the holder  31 , the protruding block  43  is located out of the locating boards  311 . The width of the protruding block  43  is slightly larger than the gap defined between the positioning boards  311 , so that the protrusions  431  are protruded out of the gap between the positioning boards  311 . The positioning hole  42  of the cultivating claw  40  is engaged with the positioning member  33  when the cultivating claw  40  is in use. When the cultivating claw  40  is not in use, the positioning member  33  is unscrewed to turn the cultivating claw  40  upward. Referring to  FIG. 8 , the protrusions  431  have a width larger than the gap between the positioning boards  311  to slightly expand the positioning boards  311 . After the protruding block  43  passes over the positioning boards  311 , the positioning boards  311  will be restored to its original position. The protrusions  431  of the protruding block  43  are confined again by the positioning boards  311  to secure the cultivating claw  40  toward the operation rod  10 . 
     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.