Abstract:
Disclosed is a target block of the dartboard, wherein said target blocks are assembled in the dartboard frame of the circle target blocks with different shapes, which can be replaced individually; the said interior target materials of the target blocks are made of sisals or similar materials. Through the formation mechanism, a predetermined amount of target materials (sisals) are disposed in the bottom of mounting seat applied with the adhesive in advance to joint the sisals and mounting seat as a whole. The target blocks put in the dartboard frame of the target blocks are in the centric circles and the same fan-shaped radial strip, which has two different colors at intervals to distinguish the blocks from each other.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to target blocks of a dartboard and its formation mechanism, particularly to target blocks of a dartboard which can be formed quickly through a formation mechanism. When said target blocks are disposed in the dartboard frame, the target blocks in the same concentric ring and in the same fan-shaped radial strip have two different colors at intervals to distinguish the blocks from each other. 
         [0003]    2. Description of the Prior Art 
         [0004]    Generally, in a conventional dartboard as shown in  FIG. 1 , a dartboard frame  10  has a plurality of gradually decreased concentric circles and radially extending ribs which are intersected to define the sectional target areas  11 . A plurality of sectional dartboard blocks  12  are disposed in the sectional target areas  11 . The surface of sectional target blocks  12  located in the same fan-shaped radial strip have the same color, while the surface of sectional target blocks  12  located in different fan-shaped radial strips have different colors. Accordingly, the target blocks located in the same fan-shaped radial strip represent the same score, and the target blocks located in different fan-shaped radial strips represent different scores. However, the fan-shaped radial strips which are separated and distinguished according to two different colors and the scores shown thereon may be misjudged and thus cause some inconvenience. 
         [0005]    Moreover, crevices may occur or increase in a conventional dartboard after darts are hit and removed from the dartboard over a long period of time, which may cause the dart tip cannot be fixed when it hits the dartboard and ultimately impacts on the score calculation. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention has been made to solve the above-mentioned problem occurring in the prior art and obviate the disadvantage of the conventional dartboard. 
         [0007]    A purpose of the present invention is to provide target blocks of a dartboard, wherein the internal of said target blocks can be made of sisals or similar materials by disposing a predetermined amount of sisals at the bottom of the mounting seat applied with adhesive in advance through a formation mechanism, so that the sisals can be adhered to the mounting seat as a whole. Moreover, when said target blocks are disposed in the dartboard frame, the target blocks in the same concentric ring and the same fan-shaped radial strip are separated from each other by two different colors. 
         [0008]    In accordance with the purpose described above, the dartboard in the present invention comprises a dartboard frame, which is composed of a plurality of dartboard concentric ribs and radially extending rectilinear ribs which are intersected with the concentric ribs, which define a plurality of receiving recesses in different shapes. A sectional target block can be disposed in each receiving recess. Each sectional target block includes a mounting seat which defines a receiving space for disposing of target materials such as a bundle of sisals or straws. The internal bottom of said mounting seat is applied with the adhesive that the target materials can be adhered onto the mounting seat; said target materials are made of a bundle of sisals which are bonded by the sisal materials and run through an assemble machine to cut the sisals into a predetermined shape (i.e. circular, trapezoid, triangular, etc.) and extrude it to a proper tightness using the pressure plate of the assemble machine, and compress it into the mounting seat, then joint into a sectional dartboard block through the adhesive on the mounting seat; said bundle of sisals of the sectional target blocks shall have at least a color for the scoring on the surface, and make the color on the sectional target blocks of the fan-shaped radial strip with the same score different. 
     
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
           [0010]      FIG. 1  is a plan view of a conventional dartboard; 
           [0011]      FIG. 2  is a flow chart of the present invention; 
           [0012]      FIG. 3A  is a three-dimensional exploded view of the present invention; 
           [0013]      FIG. 3B  is a plain view of the present invention; 
           [0014]      FIG. 4  is a view showing a step of manufacturing the target blocks of the dartboard in the present invention; 
           [0015]      FIG. 5  is a view showing another step of manufacturing the target blocks of the dartboard; and 
           [0016]      FIG. 6  is a view showing another step of manufacturing the target blocks of the dartboard. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0017]    Referring to  FIGS. 2 and 3A , the dartboard  21  of the present invention comprises a dartboard frame. Said dartboard frame is composed of a plurality of concentric ribs  22  and radially extending rectilinear ribs  23  which are intersected with the concentric ribs  22 , which define a plurality of receiving recesses  24  formed on the dartboard frame. A sectional target block  25  can be disposed in the receiving recesses  24 . The sectional target blocks  25  includes a mounting seat  26  which defines a receiving space for disposing of target materials  27  such as a bundle of sisals and straws. The internal bottom of mounting seat  26  is applied with adhesive so that the target materials  27  can be adhered to the mounting seat; said target materials  27  are made of sisals which are bonded by the sisal material and run through an assemble machine  31  to cut the sisals into a predetermined shape (i.e. circular, trapezoid, triangular, etc.) and extrude it to a proper tightness using the pressure plate  351  of the assemble machine  31 , and compress it into the mounting seat  26 , then joint into a sectional target blocks  25  through the adhesive on the mounting seat  26 ; the target materials  27  of the sectional target blocks  25  must have colors  251  and  252  for the scoring on the surface, for distinguishing different scoring blocks (as shown in  FIG. 3B ). 
         [0018]    The color design of the dartboard in the present invention is to distinguish the target blocks  25  in the isosceles triangle and target blocks  25  in the isosceles trapezoid which have the same number target blocks by different colors  251  and  252 , so that the internal circular target blocks composed by the internal target blocks  25  and external circular target blocks  25  composed by the external target blocks  25  can have interlaced colors of different combination. This presents a more vivid visual reception than the conventional dartboard. 
         [0019]    Moreover, the target blocks  25  in the present invention add more than 3 centric circles on the circular target blocks which are radially, equally extended outward from the center. The composed block target areas are colored in contrast between the inner circular areas and outer circular areas, and between each radial block of the circles. The basic color combination is: using colors  251  and  252  between each radial blocks; using a number of colors in the radially extending circular blocks to make each block have different colors. 
         [0020]    The surface of a plurality of sectional target blocks  25  described above is colored respectively. When the target blocks are fitted in with each receiving recess, they are located in the same centric circles and the same target blocks  25  of the fan-shaped radial strip. There are different colors in the vicinity. When the different colors of sectional target blocks  25  are positioned in the same fractional areas, the surface colors are different from each other; and the sectional target blocks  25  having relatively the same shape which are not positioned in the same fractional areas have different surface colors at intervals to distinguish the blocks from each other. 
         [0021]    Referring to  FIGS. 2 and 3A , the sectional target blocks  25  are formed in accordance with the following procedures (herein, sisal is used as target materials): 
         [0022]    ( 201 ) firstly, comb the sisal materials used for the target material to smooth and pick the bad sisal; 
         [0023]    ( 202 ) using the bind strip to bundle the sisal with proper amount into chunk; 
         [0024]    ( 203 ) put the bundle of sisals in the mounting machine  31 , cut said sisals into a predetermined shape (i.e. circular, trapezoid, triangular, etc.), and extrude it into proper tightness using the pressure plate  351  of the mounting machine  31 , and extrude it into mounting seat  26  (as shown in  FIGS. 4 ,  5 , and  6 ), so that it can be jointed into a sectional target blocks through the adhesive in the mounting seat  26 ; 
         [0025]    ( 204 ) trim the deckle edge on each sectional target block to avoid the partial lengthy sisals from protruding; 
         [0026]    ( 205 ) apply different colors on each sectional target blocks (e.g. applying red color on the red target blocks) to distinguish the different scoring blocks; 
         [0027]    ( 206 ) assemble each sectional target blocks into the receiving recess  24  of the dartboard frame, which forms a dartboard  21 . 
         [0028]    In the embodiment of the present invention, the sisal tightness impacts the dart shooting and pulling. If the sisal is too tight, the dart cannot be shot and pulled easily; if the sisal is too loose, the shot dart can not station at the target blocks. The moderate sisal can make the dart shoot and pull easily. It can expand to fill in the hole that is shot by the dart when the dart is pulled out so that the ugly hole won&#39;t show up. The present invention can produce the target blocks with proper tightness via the mounting machine  31  for easy shooting and pulling. 
         [0029]    Referring to  FIGS. 4 ,  5  and  6 , the mounting machine  31  has a material mount trough  32 , trim knife  33 , X-axis push rod  34 , plurality set bevel angle push rod  35 , at least a Y-axis push rod  36  and a turntable  37 . Among these, the mount trough  32  is set vertically to stack the bundles of sisals so that each bundle of sisals are produced into sectional target blocks; the trim knife  33  is connected to the retractable arm of the cylinder  41 , which enables the cylinder  41  to drive the trim knife  33  to trim the bundles of sisals; the X-axis push rod  34  is connected to the retractable arm of the cylinder  41 , which was driven by the cylinder  41  to push the bundles of sisals. Equal bevel angle push rod  35  has a pressure plate  351 ; the bevel angles are set according to the producing shape (i.e. triangular, circular, trapezoid, etc.) of the target blocks. The equal bevel angle push rod  35  is connected to the retractable arm of the cylinder  41 , which was driven by the cylinder  41  to extrude the bundles of sisals. The Y-axis push rod  36  is set on the turntable  37  and connected to the retractable arm of the cylinder  41 . It was driven by cylinder  41  to position the sisal into the mounting seat  26  of the turntable  37 . The turntable  37  connected to a servo motor. The servo motor can drive the turntable  37  to rotate intermittently (i.e. turn around of 90 degrees per 4 sec). The turntable  37  has several fixing tools. The fixing tools include a mounting seat  26  which is pre-applied with the adhesive for the sisals positioning and adhering. 
         [0030]    According to the construction described above, when the mounting machine  31  is moving, the X-axis push rod  34  pushes the lowest sisals in the material mount trough to the bottom of the trim knife  33  so that the trim knife  33  trims the sisals into a predetermined shape. Then, the cylinder  41  drives the pressure plate  351  of the bevel angle push rod  35  to the vicinity of the mounting seat  26 . It makes the X-axis push rod  34  push the completed trimming sisals to the pressure plate  351 . By using the pressure  351 , the bundles of sisals are extruded into a predetermined shape (i.e. triangular, circular, trapezoid, etc.) with proper tightness. It then positions the formed bundles of sisals into the mounting seat  26  via the cylinder  41  by driving the Y-axis push rod  36  to joint it with the sectional target blocks. The servo motor drives the turntable  37  to rotate and make the next mounting seat  26  upper the Y-axis push rod  36  to proceed with the next sectional target blocks assembling. The continuous cycling to move and assemble the sectional target blocks can produce target blocks with proper tightness to have the dart shoot and pull easily. 
         [0031]    As described above, the target blocks of the dartboard and its formation mechanism in the present invention certainly has the unprecedented structure. Also, the present invention has not yet been made public, which is consistent with relevant Innovation Patent Low. 
         [0032]    Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.