Abstract:
A toy bow configured to adjust an angle of both ends of its limb by an angle adjustor, thereby enabling the user to easily change the size and the angle of the limb, if necessary. The benefit not only extends to using the bow, but also to storing and carrying to bow due to its reduced size. Preferably, the limb is detachably mountable to a stock of a crossbow to conveniently change its application from a toy bow to a toy crossbow and vice-versa.

Description:
RELATED APPLICATION 
     This application claims priority from Korean Patent Application 10-2014-0178502 filed Dec. 15, 2014, which is herein incorporated by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a toy bow, and more specifically, to a toy bow capable of adjusting an angle of both ends of a limb by an angle adjustor, and easily detachably mounting the limb to a stock of a crossbow to conveniently change its application between the bow and the crossbow. Also, the present invention relates to a toy crossbow using the toy bow. 
     Background of the Related Art 
     In general, a bow consists of a string attached to both ends of a limb. A crossbow consist of a limb, to which a bowstring is attached, and a stock connected to the limb. That is, the crossbow is designed to be easily used rather than the general bow. 
     A toy crossbow has the substantially same structure as that of the weapon crossbow, but utilizes safe arrows. 
     Korea Unexamined Utility Model Publication No. 20-1986-0001912 discloses such a toy crossbow. 
     The crossbow disclosed in the publication includes a stock, limbs mounted to one end of the stock, and a bowstring attached to ends of the both limbs. 
     The stock is provided with a trigger for holding the drawn bowstring. 
     The bowstring is drawn from the limbs, and then is retained by a rolling cylindrical pawl (referred to as a nut) provided on the stock. After an arrow is placed on the stock, an archer pulls the trigger to fire the arrow. 
     However, the bow or the crossbow of the related art has a problem in that since a size or an angle of the limb cannot be adjusted, it is inconvenient to carry, and a large storage space is required. 
     Also, the case of the crossbow of the related art is not convenient since the usage of the crossbow cannot be altered. 
     SUMMARY OF THE INVENTION 
     Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a toy bow capable of adjusting an angle of both ends of a limb by an angle adjustor and thus easily changing a size and an angle of the limb, if necessary, thereby improving the convenience in use. 
     The other object of the present invention is to provide a toy bow capable of being easily carried and requiring a small storage space. 
     Another object of the present invention is to provide a toy bow capable of easily detachably mounting a limb to a stock of a crossbow to conveniently change its application between the bow and the crossbow. 
     Still another object of the present invention is to provide a toy crossbow using the toy bow described above. 
     according to one aspect of the present invention, there is provided a toy bow comprising a limb and a bowstring which is attached to both ends of the limb, the limb including a body; and a pair of wings which are engaged to both ends of the body to be able to adjust an angle thereof by an angle adjustor, to which the bowstring is attached. 
     According to another aspect of the present invention, there is provided a toy crossbow comprising a limb, a bowstring which is attached to both ends of the limb, and a stock which is engaged to the limb, the limb including a body to which the stock is engaged; and a pair of wings which are engaged to both ends of the body o be able to adjust an angle thereof by an angle adjustor, to which the bowstring is attached. 
     With the above configuration, the toy bow and the toy crossbow can adjust the angle of both ends of the limb by the angle adjustor and thus easily changing the size and the angle of the limb, if necessary, thereby improving the convenience in use. Also, the toy bow and the toy crossbow can be easily carried and require the small storage space. In addition, the limb can easily detachably mounted to the stock of the crossbow to conveniently change its application between the bow and the crossbow. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a toy crossbow according to the present invention. 
         FIG. 2  is an exploded perspective view illustrating the toy crossbow according to the present invention. 
         FIG. 3  is a side view of the toy crossbow in  FIG. 2 . 
         FIG. 4  is an exploded perspective view illustrating an angle adjustor for the toy crossbow according to the present invention. 
         FIG. 5  is a perspective view illustrating an assembled state of a body in  FIG. 4 . 
         FIG. 6  is an exploded cross-sectional view illustrating the angle adjustor for the toy crossbow according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 
     A toy bow according to the present invention includes a limb  10  and angle adjustors  50 , and a tow crossbow according to the present invention includes the toy bow consisting of the limb  10 , the angle adjustor  50 , and a stock  60 . 
     Specifically, if the limb  10  is detached from the stock  60 , the limb  10  can be used as a bow. On the contrary, if the limb  10  is mounted to the stock  60 , it can be used as the crossbow  1 . 
     Therefore, since only the difference between the bow and the crossbow  1  is the stock  60 , the crossbow  1  including all components will be described hereinafter by way of example. 
     The limb  10  is designed to be bent in one direction, like a bow, and may be bent and formed in various shapes from a simple one to a complicated one, as illustrated in the drawings. 
     Both ends of the limb  10  has ribs  36  for attaching the bowstring  40  to the ends thereof. 
     Specifically, one end of the bowstring  40  has a loop which is hooked and locked to the rib  36  provided on one end of the limb  10 , and the other end of the bowstring  40  also has a loop which is hooked and locked to the rib  36  provided on the other one end of the limb  10 . 
     When the bowstring  40  is attached to the ribs  36  provided on both ends of the limb  10 , the bowstring is held to be tight, and the tight degree can be adjusted when the bowstring  40  is fixed. 
     The limb  10  has a body  20  mounted to the stock  60 , and a pair of wings  30  which are engaged to both ends of the body  20  to be able to adjust an angle thereof by the angle adjustor  50 , to which the bowstring  40  is attached. 
     The body  20  is provided with a stock mounting portion  24  protruding from a center, and one end of the stock  60  is formed with an engaging groove  64  to which the stock mounting portion  24  is detachably engaged. 
     The body  20  is formed with an arrow passing hole  21  through which an arrow  45  passes. The arrow passing hole  21  is formed concentrically with the stock mounting portion  24 . That is, the arrow passing hole  21  is formed to penetrate the stock mounting portion  24 , as well as the body  20 . 
     The engaging groove  64  formed on the stock  60  communicates with the arrow passing hole  63 . That is, the engaging groove  64  is formed concentrically with the arrow passing hole  63 . 
     The stock mounting portion  24  of the body  20  is provided with a protrusion (not illustrated) on an outer peripheral surface thereof, and an inner peripheral surface of the engaging groove  64  formed on the stock  60  is formed with a groove (not illustrated). If the stock mounting portion  24  of the body  20  is fitted into the engaging groove  64  of the stock  60 , the protrusion is locked to the groove, thereby increasing an engaging force between the body  20  and the stock and thus preventing disengaging thereof. Of course, the stock  60  can be easily disengaged from the body by hands. 
     Since the stock is easily disengaged from the body  20  of the stock  10 , if the stock  60  is separated, the crossbow  1  can be converted into the bow, thereby improving the use application. 
     If the arrow  45  is placed in the arrow passing hole  21  of the body  20 , the arrow  45  passes the body  20 , and then is seated on an upper surface of the stock  60 . 
     Each angle adjustor  50  has a disc  31  which is formed on an end of each wing  30  and is provided with a plurality of angle set holes  32  in a circumferential direction; disc engaging grooves  25  which are formed on both ends of the body  20  so that the disc  31  is rotatably engaged to both ends of the body  20 , and circular grooves  22  and  23  which are formed on both sides of the body  20  in an axial direction of the disc  31 ; pin guides holes  22   a  and  23   a  which penetrate bottom surfaces of the circular grooves  22  and  23  at positions corresponding to the angle set holes  32 ; and an angle adjusting portion  50   a  for adjusting the angle of the wings  30 , the angle adjusting portion  50   a  having pins  52   b  which are installed to the circular grooves  22  and  23  of the body  20 , and are selectively locked to the angle set holes  32  through the pin guide holes  22   a  and  23   a.    
     In this instance, the disc  31  of the wing  30  is superimposed with the disc engaging grooves  25  formed on both ends of the body, and the disc  31  is concentrically positioned in the disc engaging grooves  25 . 
     The plurality of angle set holes  32  are spaced apart from each other at regular intervals in the circumferential direction, and the angle of the wings  30  can be accurately adjusted in comparison with the spaced angle of the angle set holes  32 . 
     The body  20  may be formed in unit, but is preferably formed to have to bodies so as to be easily manufactured by a mold. In this instance, the body  20  is divided into two parts on the basis of the disc engaging groove  25 . 
     The circular grooves  22  and  23  are formed on both sides of the body  20  in the axial direction of the disc  31  to have a desired depth. A bottom surface is formed between both circular grooves  22  and  23  of the body  20  and the disc engaging grooves  25  so as to divide the grooves. 
     The pins  52   b  of a second adjusting disc  52  which are described later are inserted into the pin guide holes  22   a  and  23   a  penetrating the bottom surfaces of the circular grooves, and the pine guide holes are formed in plural. In the drawings, four pin guide holes  22   a  and  23   a  are formed on the bottom surfaces of the circular grooves  22  and  23 , respectively. 
     The four pin guide holes  22   a  and  23   a  are formed at an interval of 90 degrees. In this instance, the four pin guide holes  22   a  and  23   a  correspond to four holes among the plurality of angle set holes  32  formed in the disc  31 . 
     The angle adjusting portion  50   a  has a first adjusting disc  51  with a first support shaft  51   a  which is inserted into the circular groove  22  of the body  20  and penetrates the bottom surface of the circular grooves  22  and  23  and a center of the disc  31 , and a second adjusting disc  52  with a second support shaft  52   a  which is inserted into the circular groove  23  of the body  20  and is engaged with the first support shaft  51   a , and the second adjusting disc  52  has the pins  52   b.    
     Four pins  52   b  are provided to correspond to the position of the four pin guide holes  22   a  and  23   a.    
     The first adjusting disc  51  and the second adjusting disc  52  are engaged to each other by a screw  56  in the state in which the second support shaft  52   a  of the second adjusting disc  52  is inserted into the first support shaft  51   a  of the first adjusting disc  51 . 
     In the state in which the first adjusting disc  51  is inserted in the circular groove  22  of the body  20 , and the second adjusting disc  52  is inserted in the circular groove  23  of the body  20 , the first and second support shafts  51  and  52   a  are moved together by engagement of the screw  56 . 
     That is, if the first adjusting disc  51  is pushed, the second adjusting disc  52  is moved in the same direction. 
     If the first and second adjusting discs  51  and  52  are assembled to the circular grooves  22  and  23  of the body  20  in the state in which the disc  31  of the wing  30  is inserted into the disc engaging groove  25  of the body  20 , the pins  52   b  of the second adjusting disc  52  penetrate the pin guide holes  23   a , and then are inserted into the angle set holes  32  of the disc  31  (initial position). 
     The first adjusting disc  51  and the second adjusting disc  52  are reciprocated in the axial direction of the first and second support shafts  51   a  and  52   a.    
     Specifically, in the case of adjusting the angle of the wing  30 , if the first adjusting disc  51  is pushed in one direction at the initial position, the second adjusting disc  52  is moved at the same time. In this instance, the pins  52   b  come out from the angle set holes  32  of the disc  31 , and then extend to only the pin guide holes  23   a . Therefore, it is possible to freely adjust the angle of the wing  30 . 
     In the case of fixing the angle of the wing  30  at the current position, the first and second adjusting discs  51  and  52  are operated to the initial position. Specifically, if the first pushed adjusting disc  51  is released, the first adjusting disc  51  and the second adjusting disc  52  are returned to the initial position by a resilient member  57  which will be described later. In this instance, the pins  52   b  of the second adjusting disc  52  are again inserted into the angle set holes  32  of the disc  31 , and extend to the pin guide holes  22   a  and  23   a  and the angle set holes  32 , thereby setting the angle of the wing  30 . 
     If the angle of the wing  30  is slightly turned in the state in which the first adjusting disc  51  is pushed, the pins  52  of the second adjusting disc  52  are locked to the disc  31 , and the first and second adjusting discs  51  and  52  are maintained in the pushing state. In this instance, if the angle set holes  32  of the disc  31  coincide with each other by additionally turning the angle of the wing  30 , the pins  52   b  are inserted into the angle set holes  32  by the resilient member  57 , such that the first and second adjusting discs  51  and  52  are automatically returned to the initial position. 
     The resilient member  57  is installed to the inside of the circular groove  22  to allow the first and second adjusting discs  51  and  52  to automatically return to the initial position when the first and second adjusting discs  51  and  52  are operated in one direction. 
     The resilient member  57  is made of a coil spring, and is interposed between the first adjusting disc  51  and the disc  31  to apply a resilient force to the first adjusting disc  51  and thus return the first adjusting disc to the initial position. 
     The outer peripheral surface of the disc  31  is formed with a plurality of locking grooves  33  at regular intervals, and a leaf spring  35  which is resiliently locked to the locking groove  33  is installed in an inner peripheral surface of the disc engaging groove  25 , thereby giving a sense of locking for every angle adjusting position of the wing  30 . 
     The stock  60  has a nut  62  for holding the bowstring  40  in a drawn state, and a trigger  61  for operating the nut  62 . 
     The nut  62  is formed integrally with the trigger  61 , and is spaced apart from the trigger at a desired angle. Specifically, the trigger  61  protrudes from a lower portion of the stock  60 , and the nut  62  protrudes from an upper portion of the stock  60 . 
     Accordingly, when the trigger  61  is pulled in the state in which the bowstring  40  is held by the nut  62 , the nut  62  is rotated and moved down in a downward direction, so that the drawn bowstring  40  is released and then is fired. 
     Each wheel  55  is placed in both circular grooves  22  and  23  of the body  20  to cover the outside of the first and second adjusting discs  51  and  52 . The wheels  55  are engaged to the first and second adjusting discs  51  and  52  to improve its design. 
     Hereinafter, the operation of the toy bow and the crossbow using the same according to the present invention will be described. 
     First, the limb  10  is mounted to the stock  60  to form the crossbow  1 . Specifically, the stock mounting portion  24  of the body  20  is easily fitted to the engaging groove  64  of the stock  60 . 
     Of course, if the stock  60  is separated from the limb  10 , the limb can be used as the bow. 
     The operation of the crossbow  1  will now be described by way of example. 
     In the case of the crossbow  1 , after the bowstring  40  is drawn and then is held by the nut  62  of the stock  60 , the arrow  45  is mounted. 
     The arrow  45  is pushed to the position of the nut  62  through the arrow passing hole  24  of the stock  10 . 
     And then, in the case of firing the arrow  45 , if the trigger  61  of the stock  60  is pulled, the nut  62  is moved down to release the bowstring  40 , thereby firing the arrow  45 . 
     The method of adjusting the angle of the wings  30  of the limb  10  will now be described. The method of adjusting the angle of the wings  30  in the bow is identical to that of the crossbow  1 . 
     First, in the case of adjusting the angle of the wings  30 , if the first adjusting disc  51  is pushed in one direction, the second adjusting disc  52  is simultaneously moved in the same direction. In this instance, the pins  52   b  come out from the angle set holes  32  of the disc  31 , and then extend to only the pin guide holes  23   a . Therefore, it is possible to freely adjust the angle of the wing  30 . 
     In the case of fixing the angle of the wing  30  at the current position, the first and second adjusting discs  51  and  52  are operated to the initial position. Specifically, if the first pushed adjusting disc  51  is released, the first adjusting disc  51  and the second adjusting disc  52  are returned to the initial position by the resilient member  57 . In this instance, the pins  52   b  of the second adjusting disc  52  are again inserted into the angle set holes  32  of the disc  31 , and extend to the pin guide holes  22   a  and  23   a  and the angle set holes  32 , thereby setting the angle of the wing  30 . 
     While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.