Abstract:
A control device of a cutting tool for general use or gardening is revealed. The cutting tool, formed by a first component and a second component pivotally connected to each other, can be opened or closed gradually for cutting. The control device is pivotally connected to the second component. The control device can be pushed to act on the second component. The cutting tool performs multi-stage or one-time cutting according to the control device being pushed to the required position. Moreover, the first component and the second component are close to or away from each other under control of the control device.

Description:
NOTICE OF COPYRIGHT 
       [0001]    A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to any reproduction by anyone of the patent disclosure, as it appears in the United States Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever. 
       BACKGROUND OF THE PRESENT INVENTION 
       [0002]    Field of Invention 
         [0003]    The present invention relates to a control device of a cutting tool, especially to a control device of a cutting tool that controls the cutting tool to perform multi-stage cutting and locks a blade of the cutting tool at a closed position while the cutting tool is not in use. 
         [0004]    Description of Related Arts 
         [0005]    Generally, the stem of plants is hard and thick so that the stem requires training. The cutting tool/gardening shears for training should have sharp blades. For labor saving during operation of the cutting tool, a multi-stage cutting tool is available. Moreover, a cutting tool able to control cutting modes such as the one revealed in Taiwanese Patent No. M420981 is also available. Pruning shears revealed can be switched to a cutting mode focused on training of branches. The pruning shears includes a first handle and a second handle pivotally connected which users can hold and apply their forces to. A blade unit is pivotally connected to a front end of the first handle and is corresponding to a blunt part on arranged at the front end of the first handle. A drive rod is pivotally connected to the second handle. One end of the drive rod is movably connected to a rear end of the blade unit for pushing the blade to perform cutting. A switch element with a movable and linear structure is set on the second handle. The switch element is able to move linearly to become leaning against the blade unit or move in the opposite direction to get away from the blade unit. A safety fastener is disposed on the second handle for locking an operating piece of the blade unit when the pruning shears is in a closed position. 
         [0006]    The switch element is used to control the cutting mode while the safety fastener is used to lock the operating piece of the blade unit. They are arranged at the second handle and separated from each other. The switch element is moved horizontally for pushing the blade unit while the safety fastener is worked in a pendulum manner. 
         [0007]    Thus users need to operate two parts at the same time for controlling the cutting mode or changing the pruning shears to the closed position. The design causes inconvenience to users. Moreover, both assembly cost and component cost are increased. 
       SUMMARY OF THE PRESENT INVENTION 
       [0008]    Therefore it is a primary object of the present invention to provide a control device of a cutting tool that switches the cutting tool to different cutting mode with lower cost. Moreover, the control device also provides a locking function. 
         [0009]    In order to achieve the above objects, a control device of a cutting tool according to the present invention includes a first component and a second component. One end of the first component is extended to form an anvil part. One end of the first component is pivotally connected to a blade. One end of the blade is extended to form a blade handle. The blade handle includes a hollowed-out window and one end thereof is extended to form a pin. The blade and the anvil part are moved for cutting through the first component and the second component due to the pivotally connected first and second components and second components and other overlapped related parts. 
         [0010]    The second component includes a first assembly part and a receiving space. The receiving space is formed by a first wall and a second wall, each of which is disposed with a first bulge and a second bulge used for positioning. The present invention features on that the receiving space is mounted with a control device and the control device is pivotally connected to the first wall and the second wall. The control device consists of a pivot part, a first holding part and a second holding part formed by extension of the pivot part, a platform part arranged between the first holding part and the second holding part, and a groove set on the platform part. 
         [0011]    A support body is made from metal and having a connection part, a back part formed by extension of the connection part and a hook part formed by extension of one end of the back part. The shape of the connection part is matched with the shape of the groove for being mounted in the groove. The horizontal surface of the back part and the horizontal surface of the platform part are on the same plane while the hook part is projecting from the platform part. The pivot part is mounted into the receiving space. A pivot hole of the pivot part is aligned with pivot holes of the first and the second walls. Thereby the control device is pivotally connected to the second component. The first holding part and the second holding part are pushed and operated on the first wall and the second wall like a pendulum. 
         [0012]    The pin of the blade is leaning against the back part of the support body while the first holding part and the second holding part being pushed to the first bulge. Thus the cutting tool is in a one-time cutting mode. When the first holding part and the second holding part is pushed to the second bulge, the pin of the blade is not leaning against the back part of the support body, so the cutting tool is in a multi-stage cutting mode. 
         [0013]    Next, the first component and the second component are moved toward each other to make the blade and the anvil part become closed. Then the first holding part/the second holding part is pushed and moved to the position between the first bulge and the second bulge. Then the hook part is locked with the pin of the blade and the control device is used to lock the blade and the anvil part at the closed position. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein: 
           [0015]      FIG. 1  is an explosive view of an embodiment according to the present invention; 
           [0016]      FIG. 2  is an explosive view of a control device of an embodiment according to the present invention; 
           [0017]      FIG. 3  is a longitudinal cross sectional view of a control device of an embodiment according to the present invention; 
           [0018]      FIG. 4  is a perspective view of an embodiment according to the present invention; 
           [0019]      FIG. 5  is a schematic drawing showing an embodiment in use according to the present invention; 
           [0020]      FIG. 6  is another schematic drawing showing the embodiment of  FIG. 5  in use according to the present invention; 
           [0021]      FIG. 7  is a longitudinal cross sectional view of the embodiment of  FIG. 6  according to the present invention; 
           [0022]      FIG. 8  is a further schematic drawing showing an embodiment in use according to the present invention; 
           [0023]      FIG. 9  is a further schematic drawing showing an embodiment in use according to the present invention; 
           [0024]      FIG. 10  is a further schematic drawing showing an embodiment in use according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0025]    In order to learn functions and features of the present invention, please refer to the following embodiments with detailed description and the figures. 
         [0026]    Refer to  FIG. 1 ,  FIG. 2  and  FIG. 3 , a control device of a cutting device includes a first component  1  and a second component  2 . The first component  1  consists of a handle  11 , an anvil part  12  formed by extension of one end of the handle  11 . A slot  12   a  is longitudinally formed on the anvil part  12  while a first pivot hole  121  is disposed between the handle  11  and the anvil part  12 . A second pivot hole  111  is mounted on the handle  11 . The second component  2  is composed of a handle part  21 , a receiving space  22  and a first assembly part  23 . The first assembly part  23  formed by a pair of plates extended from one end of the handle part  21  is arranged with third pivot holes  231   a ,  231   b  and fourth pivot holes  232   a ,  232   b . The second pivot hole  111  is used for pivotal connection to a blade  3  and a blade handle  32  formed by extension of one end of the blade  3 . An insertion hole  321  and a hollowed-out window  322  are mounted on the blade handle  32  while one end of the blade handle  32  is extended to form a pin  323 . The blade handle  32  is passed through the slot  12   a  of the anvil part  12  and the insertion hole  321  thereof is aligned with and pivotally connected to the second pivot hole  111  by a shaft  75 . The first pivot hole  121  is aligned with and pivotally connected to the third pivot holes  231   a ,  231   b  by a shaft  71 . 
         [0027]    Refer to  FIG. 2 , one end of the handle  21  of the second component  2  is the receiving space  22  formed by a first wall  22   a  and a second wall  22   b . The first wall  22   a  and the second wall  22   b  are disposed with a pivot hole  223   a ,  223   b  respectively. Both the first wall  22   a  and the second wall  22   b  are arranged with a first bulge  221  and a second bulge  222 . The receiving space  22  is for mounting a control device  5 . The control device  5  includes a pivot part  52  with a pivot hole  521 , a first holding part  51   a  and a second holding part  51   b  formed by extension of the pivot part  52 , a platform part  53  between the first holding part  51   a  and the second holding part  51   b , and a groove  54  set on the platform part  53 . 
         [0028]    Refer to  FIG. 2 , a support body  6  made from metal includes a connection part  61  with a pivot hole  611 , a back part  62  formed by extension of the connection part  61  and a hook part  63  formed by extension of one end of the back part  62 . The pivot hole  611  of the support body  6  is aligned with and assembled with the pivot hole  521  of the pivot part  52 . The shape of the connection part  61  is matched with the shape of the groove  54 . The horizontal surface of the back part  62  and the horizontal surface of the platform part  53  are on the same plane while the hook part  63  is projecting from the platform part  53  after the support body  6  being mounted into the groove  54 , as shown in  FIG. 3 . 
         [0029]    Refer to  FIG. 1  and  FIG. 4 , the pivot part  52  is mounted into the receiving space  22 . The pivot hole  521  is aligned with the pivot holes  223   a ,  223   b  of the first and the second walls  22   a ,  22   b  and then pivotally connected to the second component  2  by a shaft  73 . Thus the control device  5  is rotatable and stopped within the receiving space  22 . The first holding part  51   a  and the second holding part  51   b  are respectively leaning against the first wall  22   a  and the second wall  22   b . Thus the control device  5  can be operated like a pendulum. 
         [0030]    A connection rod  4  consists of a protruding part  41 , a first hole  42  at one end, and a second hole  43  at the other end  43 . A spring  8  is fitted on the protruding part  41 . The first hole  42  is aligned with the fourth pivot holes  232   a ,  232   b  and pivotally connected to the second component  2  by a shaft  72 . The second hole  43  is aligned with and pivotally connected to the window  322  of the blade  3  by the shaft  73 . Thereby the end part of the connection rod  4  with the second hole  43  can be moved a certain distance within the window  322 . 
         [0031]    Refer to  FIG. 1  and  FIG. 4 , a part of the anvil part  12  of the first component  1  with the first pivot hole  121  is set into the first assembly part  23  and the first pivot hole  121  is aligned with the third pivot holes  231   a ,  231   b  of the second component  2 . The shaft  71  is passed through and pivotally connected the third pivot hole  231   a , the first pivot hole  121 , the insertion hole  321  and the third pivot hole  231   b . By the above pivotally connected first and second components and other overlapped related parts, the blade  3  and the anvil part  12  are moved for cutting through the first component  1  and the second component  2 . Refer to  FIG. 8 , the blade  3  and the anvil part  12  are in an open position and ready for cutting. As shown in  FIG. 6 , the blade  3  and the anvil part  12  are in a closed position. The first component  1  and the second component  2  are limited and unable to be operated for cutting. 
         [0032]    Refer to  FIG. 5 ,  FIG. 8 ,  FIG. 9  and  FIG. 10 , the pin  323  of the blade  3  is leaning against the back part  62  of the support body  6  while the first holding part  51   a /the second holding part  51   b  being pushed to the first bulge  221 . Thus the cutting tool is in a cutting mode of one-time cutting. When the first holding part  51   a /the second holding part  51   b  is pushed to the second bulge  222 , the pin  323  of the blade  3  is not leaning against the back part  62  of the support body  6  and the cutting tool in a multi-stage cutting mode can perform multi-stage cutting. Refer to  FIG. 7 , the blade  3  and the anvil part  12  are getting closer to each other and then becoming closed when the first component  1  and the second component  2  are moved toward each other. Then the first holding part  51   a /the second holding part  51   b  is pushed to move from the second bulge  222  to the position between the first bulge  221  and the second bulge  222 . Then the hook part  63  is locked with the pin  323  of the blade  3  and the control device  5  is used to lock the blade  3  and the anvil part  12  at the closed position. 
         [0033]    In summary, the present invention has the following advantages. 
         [0034]    1. The support body  6  for the control device  5  is made from metal that is hard and wear resistant. Thus the support body  6  will not be worn out when the pin  323  of the blade  3  is leaning against the back part  62  of the support body  6  and still worked normally even after being operated multiple times. 
         [0035]    2. The support body  6  for the control device  5  includes the hook part  63  so that the control device  5  can provide a locking function. 
         [0036]    Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.