Induction Frame for a Dartboard

Abstract

An induction frame for a dartboard is positioned on the front surface of the dartboard according to predetermined shape and number so as to define a plurality of scoring areas thereon. The induction frame is inductive and has conductive ends that are used to penetrate the dartboard. On the front side of the respective frames is formed guiding surface that is located in the direction in which the dart is tossed. The abovementioned design enables the respective frames to be directly connected to the electronic scoring unit for scoring, thus effectively simplifying the structure, reducing the complexity and cost of the circuit.

1 . An induction frame for a dartboard being mounted on a surface of a dartboard, the induction frame is conductive, wherein a plurality of induction frames is electrically connected to an electronic scoring unit, respectively, forming at least one magnetic induction circuit, the induction frame is formed with conductive ends, and the plurality of induction frames are connected to one another. 
   
   
       2 . The induction frame for a dartboard as claimed in  claim 1 , wherein the induction frames are positioned on a front surface of the dartboard according to predetermined shape and number. 
   
   
       3 . The induction frame for a dartboard as claimed in  claim 1 , wherein the induction frames are arc-shaped, fan-shaped, circular, square, triangle-shaped, or intersect with one another. 
   
   
       4 . The induction frame for a dartboard as claimed in  claim 1 , wherein the induction frame includes two types of frames: arc-shaped frames and fan-shaped frames, the arc-shaped frames and fan-shaped frames intersect one another. 
   
   
       5 . The induction frame for a dartboard as claimed in  claim 4 , wherein an isolating member is arranged at each intersection of the arc-shaped frames and the fan-shaped frames. 
   
   
       6 . The induction frame for a dartboard as claimed in  claim 5 , wherein each conductive end of the respective frames has a sharp front terminal portion that is used to penetrate the dartboard. 
   
   
       7 . The induction frame for a dartboard as claimed in  claim 5 , wherein the electronic scoring unit has connecting members that are to be engaged with the conductive ends of the respective arc-shaped frames and the fan-shaped frames, the electronic scoring unit is electrically connected to the conductive ends of the induction frame by the connecting members. 
   
   
       8 . The induction frame for a dartboard as claimed in  claim 1 , wherein each of the induction frames is formed with a bevel guiding surface that is located in the direction in which the dart is tossed. 
   
   
       9 . The induction frame for a dartboard as claimed in  claim 8 , wherein the bevel guiding surface is an arc-shaped surface, a reverse V-shaped structure having two bevel surfaces, or a single bevel surface. 
   
   
       10 . The induction frame for a dartboard as claimed in  claim 5 , wherein the isolating member is an isolating piece, an anodized layer, a plating layer, a layer of isolating coating or an isolating block. 
   
   
       11 . The induction frame for a dartboard as claimed in  claim 1 , wherein the dartboard is made of wood, plastic, or sisal. 
   
   
       12 . The induction frame for a dartboard as claimed in  claim 1 , wherein the respective induction frames are formed at a lower edge thereof with a blade-shaped engaging portion, the blade-shaped engaging portion and the sharp front terminal portion are engaged in the dartboard. 
   
   
       13 . The induction frame for a dartboard as claimed in  claim 5 , wherein a reverse U-shaped isolating member is arranged at each intersection of the arc-shaped frames and the fan-shaped frames. 
   
   
       14 . The induction frame for a dartboard as claimed in  claim 5 , wherein an isolating member with an upper engaging groove and a lower engaging groove is arranged at each intersection of the respective arc-shaped frames and the fan-shaped frames, and the upper engaging groove and the lower engaging groove of the isolating member are used for mating with the respective arc-shaped frames and the fan-shaped frames. 
   
   
       15 . The induction frame for a dartboard as claimed in  claim 1 , wherein the induction frame is made of conductive material, such as iron, steel, stainless steel, aluminum, copper, cast iron, zinc, silver, tungsten, nickel, or an alloy of these metals. 
   
   
       16 . The induction frame for a dartboard as claimed in  claim 1 , wherein the induction frame is made of conductive hard material, such as conductive hard plastic material. 
   
   
       17 . The induction frame for a dartboard as claimed in  claim 7 , wherein the conductive ends of the respective arc-shaped frames and the fan-shaped frames are formed with threads to be engaged with threads of the connecting members of the electronic scoring unit, so as to achieve electric connection. 
   
   
       18 . The induction frame for a dartboard as claimed in  claim 1 , wherein accessories made of other materials are inserted in or coated on the induction frame. 
   
   
       19 . The induction frame for a dartboard as claimed in  claim 4 , wherein each of the induction frames is formed with a bevel guiding surface that is located in the direction in which the dart is tossed. 
   
   
       20 . The induction frame for a dartboard as claimed in  claim 4 , wherein the respective induction frames are formed at a lower edge thereof with a blade-shaped engaging portion, the blade-shaped engaging portion and the sharp front terminal portion are engaged in the dartboard.