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.

Abstract: An integrating wave sensing and magnetic induction dartboard system comprises: a magnetic induction dartboard, a wave sensing device, and an electronic scoring circuit. The waving sensing device is fixed on the magnetic induction dartboard and is connected to the electronic scoring circuit. When the electronic scoring circuit receives the magnetic signal and the wave signal simultaneously, a score will be created. The abovementioned system still can produce accurate scoring data in the presence of electromagnetic interference. It can determine if the target is missed or not based on the shock or sound caused by dart’ landing.

Abstract: A unidirectional coil induction system for a dartboard comprises: a plurality of induction loops electrically connected to an electronic scoring circuit and a comparison circuit that are disposed on a dartboard. The dartboard is equally divided into a plurality of scoring areas, each scoring area includes at least one induction loop. All the induction loops wind in the same direction and are positioned in the dartboard. When the dart lands on the dartboard, one of the induction loops will produce a positive induction signal, and a neighboring induction loop will produce a negative induction signal, and then the comparison circuit will inform the electronic scoring circuit to score after determining the induction loop of the scoring area in which the dart lands. Therefore, the present invention can prevent the problem of wrong scoring caused by the dart synchronously cutting several induction loops, and can improve the scoring accuracy.

Abstract: An apparatus and method for magnetizing a dart, comprise the steps of: A. preparing a temporarily magnetizable dart; B. charging the dart with a magnet charger; and C. throwing dart and scoring. Through the abovementioned steps, the magnetizing coil or permanent magnet serves as a magnet charger to magnetize the dart, and the magnetic induction material of the dart will produce a temporary magnetic force. The temporary magnetic force of the dart can cooperate with the magnetic induction scoring dartboard to automatically create a score, and the temporary magnetism will disappear within a predetermined period of time. Therefore, the dart is suitable for use in a formal dart competition, and the user doesn't have to worry about the adverse effect of the magnetic force.

Abstract: A dart comprises: a body, a shaft, a flight, a tip, and a magnetic member. The body is formed with a receiving space, the magnetic member is detachably disposed in the receiving space of the body and is located between the body and the shaft. The tip is made of magnetic induction material. The magnetic member can be assembled and disassembled easily, and the magnetic induction material of the tip is attracted by the magnetic member to produce lines of magnetic force.

Abstract: A game dart includes a dart barrel having a hollow chamber and front and rear ends each having a screw hole communicating with the hollow chamber. A ballast is retained in the chamber of the dart barrel, and includes two ends each having an engaging member for suspending the ballast in the chamber of the dart barrel, a dart point and a longitudinal flight shaft each includes a threaded coupler for detachably threading with the screw holes of the ends of the dart barrel, and the shaft includes a flight attached to the trailing end. The ballast may be molded within the dart barrel, and the dart barrel may have the screw holes directly formed in the ends for threading with the dart point and the shaft.

Abstract: A method for driving an electric percussion tool which includes a solenoid, a plunger core partially engaged in one end of the solenoid, and a spring disposed out of the solenoid and closer to the other end of the solenoid and distal to the plunger core. The solenoid is energized to draw the plunger core from one end to the middle of the solenoid, and selectively de-energized to allow the plunger core to force against the spring member. The solenoid is energized and de-energized again to move the plunger core toward the middle portion and then to move in the driving direction in addition to the spring biasing force applied by the spring member.

Abstract: A timepiece includes a reference wheel and a target wheel each having one or more reflective members for reflecting a light generated from a light emitting device. The position of the reference wheel may be determined when receiving a starting code, in order to align an orifice of the reference wheel with the light emitting device, for allowing the light to be reflected by the reflective member of the target wheel. The reflective members of the target wheel are arranged in a binary code sequence for determining the position of the target wheel relative to the reference wheel.

Abstract: A timepiece includes a light emitting device for generating a light, and one or more rotary wheels having one or more light receiving orifices, and one or more reflective members attached onto the sides of the rotary wheels for reflecting the light generated by the light emitting device and emitted through the orifices of the rotary wheels. The orifices may be easily and precisely formed in the rotary wheels while forming the rotary wheels, and the reflective members may be easily attached onto the rotary wheels without precisely positioning relative to the rotary wheels.

Abstract: A device for generating a 3-D image includes a tubular body with liquid filled therein and two protrusion portions extrude from one side of the body. Two stereoscopically related two-dimensional pictures are located on another side opposite to the side having the two protrusion portions. A 3-D image is seen when viewing the two pictures via the two protrusion portions.

Abstract: A timepiece includes a reference wheel and one or more target wheels to be detected and corrected to the correct or standard time. The target wheels each includes a number of binary codes angularly spaced from each other, and each having a number of digits radially spaced from each other. The reference wheel includes a number of orifices angularly and radially spaced from each other, for moving over the digits of the binary codes and for determining the positions of the wheels by moving the orifices of the reference wheel relative to the digits of the binary codes.

Abstract: A timepiece includes a reference wheel and a target wheel each having one or more reflective members for reflecting a light generated from a light emitting device. The position of the reference wheel may be positively determined when receiving a starting code which includes one or more “off” signals and one or more “on” signals reflected by the reflective member of the reference wheel. The reference wheel may be quickly rotated to align an orifice with the light emitting device, for allowing the light to be reflected by the reflective member of the target wheel.

Abstract: A timepiece includes a light emitting device for generating a light, and one or more rotary wheels having one or more light receiving orifices, and one or more reflective members attached onto the sides of the rotary wheels for reflecting the light generated by the light emitting device and emitted through the orifices of the rotary wheels. The orifices may be easily and precisely formed in the rotary wheels while forming the rotary wheels, and the reflective members may be easily attached onto the rotary wheels without precisely positioning relative to the rotary wheels.

Abstract: A timepiece includes a reference wheel and a target wheel each having one or more reflective members for reflecting a light generated from a light emitting device. The position of the reference wheel may be determined when receiving a starting code, in order to align an orifice of the reference wheel with the light emitting device, for allowing the light to be reflected by the reflective member of the target wheel. The reflective members of the target wheel are arranged in a binary code sequence for determining the position of the target wheel relative to the reference wheel.

Abstract: A timepiece includes a reference wheel and a target wheel each having one or more reflective members for reflecting a light generated from a light emitting device. The position of the reference wheel may be positively determined when receiving a starting code which includes one or more “off” signals and one or more “on” signals reflected by the reflective member of the reference wheel. The reference wheel may be quickly rotated to align an orifice with the light emitting device, for allowing the light to be reflected by the reflective member of the target wheel.

Abstract: A device for generating a 3-D image includes a tubular body with liquid filled therein and two protrusion portions extrude from one side of the body. Two stereoscopically related two-dimensional pictures are located on another side opposite to the side having the two protrusion portions. A 3-D image is seen when viewing the two pictures via the two protrusion portions.

Abstract: A dart board includes a backing board from which a plurality of tightly overlapped sheets of artificial material extend and each of the sheets has a lot of slits defined therethrough. The slits extend in a direction which is perpendicular to the backing board. When a tip of a dart is inserted into the dart board, the slits expand and provide the sheets flexibility so that after the dart is removed, the sheets bounce back without leaving a hole in the dart board.

Abstract: A ball detection device includes a frame with a hitting member connected to a center of the frame. A plurality of detection members are connected between corners of the hitting member and the frame. A CPU is electrically connected to the detection members and a display member. When the hitting member is hit by a ball, the detection members are pulled and send a respective signal according the tension the detection member is applied to the CPU and a corresponding information is displayed on the display member.

Abstract: A finger nail decal attaching device includes a base member having a recess for receiving finger therein. A strip driven by two mandrels is movably located above the base member and a plurality of decals are connected to the strip. A heating member is located beside the strip and softens the decals. A pressing member has a rod and a soft pad which is connected to a first end of the rod and located above the strip. The rod is moved toward the strip by pivoting a lever connected to the rod.

Abstract: A score structure for a dart board includes a frame with at least three sides and one of the at least three sides is an inward curved side. A body member is received in the frame and the inward curved side urges one of sides of the body member to let the body member be snugly received in the frame.