Electronic dart

Abstract

An electronic dart comprises a frame, a target grille rotatable in the frame, protective frames on the target grille target blocks on sector-shaped spaces of the target grille, a sensor assembly, a rear board threadedly secured to both the target grille and the frame, and a score display board on the bottom being at a relative long distance from the dart for preventing from being hit by errant darts. A replacement of the damaged target block can be done by first disengaging the rear board and the target grille from the frame. Furthermore, score signal is wirelessly sent to the score display board.

What is claimed is:  
     
         1 . An electronic dart comprising: 
 a ring-shaped frame including an inner flange, a score ring disposed on the inner flange, and a circuit board disposed on the inner flange, the circuit board having a signal transmission assembly having a plurality of switches;    a round target grille confined by the frame, the target grille including a central rotary shaft so as to be rotatable with respect to the inner flange, a peripheral flange, a plurality of sector-shaped spaces, and a plurality of holes each at an intersection of a circumferential bar and a radial rib of the target grille;    a plurality of protective frames including a plurality of staged inner positioning protrusions secured in the holes;    a plurality of target blocks disposed on the sector-shaped spaces;    a plurality of containers for receiving the target blocks, each container including a plurality of pegs on the bottom;    a sensor assembly including a plurality of thin boards and a circuit board, the sensor assembly being releasably secured to the target grille and being electrically connected to the circuit board;    a rear board releasably secured to both the target grille and the frame; and    a score display board on the bottom, the score display board including a signal receiving assembly,    wherein when a thrown dart hits one of the target blocks, the hit target block is pressed to displace inward to cause the pegs to contact the sensor assembly and enable one of the switches for running one of a plurality of score calculation programs, in response a score signal is generated by the sensor assembly, the score signal is sent to the signal transmission assembly for enabling it to detect, determine, and encode the signal and wirelessly transmit the encoded signal to the score display, and the signal receiving assembly receives the encoded signal for decoding, analyzing, and showing a score calculated by the score calculation program on the score display board.    
     
     
         2 . The electronic dart of  claim 1 , wherein each protective frame comprises a first end slope at its longer section, a projection extended from the end slope, a second end slopes at its shorter section being matingly engaged with the first end slope, and a recess in the second end slope for receiving the projection.  
     
     
         3 . The electronic dart of  claim 1 , wherein the frame further comprises a plurality of projecting sliding blocks on the bottom and the score display board further comprises a concave engagement portion on the top being matingly engaged with the peripheral arc of the frame, and a plurality of grooves disposed on the engagement portion for releasably receiving the sliding blocks.  
     
     
         4 . The electronic dart of  claim 1 , wherein the signal transmission assembly further comprises a signal transmission module and an encoding microprocessor, and the signal receiving assembly comprises a receiving module, a decoding microprocessor, a game microprocessor, and a display microprocessor whereby in response to a signal receiving at the receiving module the decoding microprocessor decodes the received signal, the game microprocessor determines which score calculation program is performed, and the display microprocessor shows the score.  
     
     
         5 . The electronic dart of  claim 1 , wherein the score is added to a password and a dart code of the hit target block to obtain a check sum.  
     
     
         6 . The electronic dart of  claim 1 , wherein each target block comprises a target block body and a target block frame having an upper opening for receiving the target block body.  
     
     
         7 . The electronic dart of  claim 1 , wherein each target block comprises a target block body and a hollow target block frame for receiving the target block body.  
     
     
         8 . The electronic dart of  claim 1 , wherein the frame further comprises a plurality of rear studs equally spaced apart around the inner flange, the target grille further comprises a plurality of hole-shaped tabs equally spaced apart around the peripheral flange, and the rear board comprises a plurality of first and second apertures so that the rear board and the target grille are able to be secured together by driving a plurality of first fasteners through the first apertures and the tabs, and the rear board and the frame are able to be secured together by driving a plurality of second fasteners through the second apertures and the studs.