1. Field of the Invention
The present invention relates to a lifting device, and more particularly to a lifting device for hammer game machine.
2. Description of Related Art
A conventional hammer game machine uses an electromagnetic valve to operate a lifting device thereof. However, the housing of the conventional lifting device is usually made of plastic material and the housing may be softened and transformed due to the thermal energy from the electromagnetic valve. As a result, the accuracies among the elements of the lifting device are lost and the resistance of lifting the target is raised. Accordingly, the electromagnetic valve needs a greater electric current to operate the lifting device such that the temperature of the electromagnetic valve may be raised, even be burned-out.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional lifting device of hammer game machine.
The main objective of the present invention is to provide an improved lifting device for hammer game machine, which has no electromagnetic valve disposed therein.
To achieve the objective,
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
Referring to the drawings and initially to
The frame (10) has a slot (11) longitudinally defined therein. The motor (20) has a shaft (21) extending therefrom and extending through the frame (10).
The seat (30) includes a cavity (31) longitudinally defined therein and forming an opening (32) in a top of the seat (30). A through hole (33) is centrally defined in a bottom of the cavity (31). An annular flange (34) outwardly extends from the top of the seat (30) and multiple through holes (341) is defined in the annular flange (34) for assembling the seat (30) to the hammer game machine (not shown) by screw bolts (not shown).
The lifting unit (60) includes a main shaft (61) having a tray (611) slidably received in the cavity (31) and a rod (612) centrally extending from the tray (611), wherein the rod extending through the through hole (33). A buffer (63) is secured on the tray (611) and a target (62) is mounted onto the buffer (611).
The linkage assembly (70) includes a first linkage (71) having a first end secured on the shaft (21) of the motor (20) and a second linkage (72) having a first end pivotally connected to a second end of the first linkage (71). A bridge (73) has a first end pivotally connected to a second end of the second linkage (72) and a second end opposite to the first end thereof.
The first bracket (40) includes a bottom plate (41) secured on a free end of the rod (612) and a side plate (42) vertically extending from one side of the bottom plate (41). The first bracket (40) includes multiple magnetic elements (411) secured on the bottom plate (41).
The second bracket (50) is laterally connected to the bridge (73) through the slot (11). The second bracket (50) is made of magnetic induction material such that the second bracket (50) and the first bracket (40) are selectively connected to each other due to the magnetic effect of the magnetic elements (411).
For sequentially controlling the motor (20), the lifting device in accordance with the present invention further comprises a first sensor (81) mounted on the upper portion of the frame (10), a second sensor (82) and a third sensor (83) respectively secured on two opposite sides of the frame (10), wherein the first sensor (81) is a optic induction switch, the second sensor (82) and the third sensor (83) are limit switches. The first sensor (81), the second sensor (82) and the third sensor (83) are respectively electrically connected to the motor (20). The functions and operational methods of the sensors (81, 82, 83) are described hereinafter.
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As described above, the lifting device in accordance with the present invention uses mechanisms to lift the first bracket (40) and the second bracket (50) such that the electromagnetic valve of the conventional hammer game machine is unnecessary to the lifting device in accordance with the present invention. As a result, the lifting device in accordance with the present invention can mitigate and/or obviate the disadvantages of the conventional lifting device of hammer game machine.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.