Abstract:
The present invention provides a dynamic searching device for toys, having at least two optical sensors to sense a target and a control circuit to compare the sensed signals of the two sensors and control a driver to move the toy, thus giving the toy dynamic movement.

Description:
BACKGROUND OF THE INVENTION 
     (a) Field of the Invention 
     The present invention relates to a dynamic searching device for toys. 
     (b) Description of the Prior Art 
     Many toys are often driven by mechanical devices to control the motion thereof, such as toy vehicles. However, the toys are generally controlled by remote control, and lack spontaneous and automatic movement and interactive operation. Compared to the fast development of interactive games, such as computer games, the conventional mechanical toys are relatively dull and cannot attract children. 
     SUMMARY OF THE INVENTION 
     The present invention is intended to provide a dynamic searching device for toys, which comprises at least two optical sensors to sense a target and a control circuit to compare the sensed signal of the two sensors and control a driver to move the toys with the sensor, thus giving the toys dynamic movement. 
     It is another object of the present invention to give the toys dynamic simulation effects by adding more movement or visual effect to the toys when the sensor is sensing the right target. 
     It is another object of the present invention to provide a dynamic searching device which can use sensors other than optical sensors. 
     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing, in which: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is the cross sectional view of the present invention. 
     FIG. 2 is the perspective view of the present invention. 
     FIG. 3 is the circuit diagram of the present invention. 
     FIG. 4 is the bottom view of the present invention. 
     FIG. 5 is a view showing the sensor of the present invention. 
     FIG. 6 is another view showing the sensor of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in FIG. 1, the dynamic searching device for toys according to the present invention comprises a main body  1  having a rotary stage  11  and a base  12 , a driver  2 , a control circuit  3 , an optical sensor  4 , and a power source  5 . The rotary stage  11  and the base  12  are connected through a link shaft  20  driven by the driver  2 . The control circuit  3  sends commands to the driver  2  with reference to the sensed result of the sensor  4 . 
     With reference now to FIGS. 1 and 2, in the tank  10  according to a preferred embodiment, the rotary stage  11  is the turret  110  of the tank, the base  12  is the carrier  120  of the tank, the optical sensor  4  is a pair of sensors  41  and  42  parallel to each other and arranged on both sides of the turret  100 . Moreover, for providing 3-D searching effect, three sensors may be provided. A gun  111  is arranged at the center of the turret  110 . The turret  10  can rotate to aim at the sensed target, therefore the tank  10  provides interactive amusement. The two sensors  41  and  42  are of the same operational wavelength and the target  6  to be detected is monochromatic. For examples, the military car is green color, the building is brown. The separation  60  between the two light axes  61  and  62  of the two sensors  41  and  42  is smaller than the size of the target  6 . The sensed results of the sensors  41  and  42  are sent to a comparator  31  and amplified by an amplifier  32 , then sent to the driver  2 . As shown in FIGS. 2 and 3, after the power switch  51  is turned on, the turret  110  begins rotating to search for target  6 . The sensed results of the sensors  41  and  42  are different if the turret  110  does not aim at the right target. The comparator  31  sends an output signal corresponding to this result and the turret  110  keep rotating. The sensed results of the sensors  41  and  42  are the same if the turret  110  aims at the right target. The comparator  31  sends an output signal corresponding to this result and the turret  110  stops rotating. 
     Moreover, after the right target is aimed, the control circuit  3  activates an audio means  7  to raise a sound of gun shot and activates an auxiliary means  8  which provides a kick effect to the tank  10 . 
     Furthermore, the tank  10  has a motor  9  within the carrier  120  driving the wheels  100  under the carrier  120 . At the beginning, the comparator  31  sends an output signal corresponding to not-finding target, and commands the motor  9  to keep the carrier  120  moving. After the gun is aimed, the comparator  31  sends an output signal corresponding to finding the target, and commands the motor  9  to stop the carrier  120 . The motor  9  is a single polarity due to the straight movement of the carrier  120 , and the rotary stage  11  is dual polarity because the turret  110  can rotate in clockwise or counter clockwise directions. 
     Moreover, the sensing range of the sensor  4  is limited to prevent wrong detection and ensure a sensing region. In other words, the sensor  4  will not detect an object out of the region of interest. 
     As shown in FIG. 4, the wheel driver of the motor  9  is a universal wheel-driver  90  wherein two wheels  91  and  92  are connected coaxially with the driving disk  93 . Therefore, the carrier  120  will change its moving direction automatically once meeting an obstacle. 
     Furthermore, the sensor  4  in the present invention can also be an audio sensor or other type of sensor such as IR sensor or thermal sensor. For explanation, an audio sensor is taken for example and has two audio sensors  410  and  420  for detecting an audio signal. The sensors  410  and  420  are designed to detect predetermined audio data and find the direction of maximum audio source. For example, the dynamic searching device with sensors  410  and  420  are arranged in a movable baby toy which is looking for a target of mother. The target (mother) will raise a comforting sound once the baby toy has found it. 
     When using an audio sensor, various-frequency signals can be used such as high-frequency, low frequency audio signal or other frequency signal. The control circuit  3  is designed to be applicable to a signal of above frequency to trigger various auxiliary means, or an audio IC with corresponding audio sensor can be used. 
     Moreover, the present invention can use multiple types of sensors, e.g. audio and thermal sensor simultaneously to find multiple data, and the control circuit  3  is adapted to receive and process above multiple types of sensing data. 
     As shown in FIG. 5, the sensor  4  further comprises two light guiding pipes  430  and  440  and the axes  61  and  62  such that the size of the target can be reduced and the dynamic searching device is applicable to a target of small size. 
     Moreover, as shown in FIG. 6, the axes of the sensors  41  and  42  are inclined and intersected such that the size of the target  6  can be reduced and the dynamic searching device is applicable to a target of small size. 
     Moreover, the sensor of the present invention is designed to detect light of a specific wavelength for use in a combat game. For example, the two armies are featured with red and white color, and the sensors thereof can distinguish ally from enemy. 
     As shown in FIG. 1, a conductive terminal  50  is arranged between the base  12  and the rotary stage  11  and centered around the shaft  20 . By the conductive terminal  50 , the power source  5  can be more flexibly arranged and the inventive device can be scaled down. 
     Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.