Control circuit push-control and display apparatus for multi-purpose power leisure car
This application is a continuation-in-part of Ser. No. 08/103,929 filing date Aug. 6th, 1993 now abandoned. 
    
    
     FIELD OF THE INVENTION 
     This invention relates to a push button control circuit and display apparatus for multi-purpose electric car, and particularly to the type of leisure time car having a display panel that incorporates left turn and right turn signal LEDs, obstacle light display, speed shifting, headlamp display, solenoid brake release display, automatic charge and buzzer display functions to enable the users to attain the aim of leisure time sports driving as integrally set up through an automatic control circuit. 
     BACKGROUND OF THE INVENTION 
     In recent years sports have become increasingly popular in our society. Bicycles, once a conventional and popular traffic, after persistent evolution and improvement, now are in the mainstream of leisure sports among people. Because of low speed and convenience, conventional leisure bicycles also have become widely popular with modern leisure loving groups. Nevertheless, because ordinary bicycles only have manual mechanical control functions such as moving forward/backward, turning, etc., the conventional bicycles don&#39;t completely satisfy the need for novelty in the changing leisure market. In view of this, the inventor has developed a multi-purpose leisure car that is totally safe in operation to replace the conventional type of mechanical power meter indication, rotational speed modulation, push-key type display for headlamp, directional signals, obstacle light, brake lamp and horn, etc. which are poor in terms of function. The invention is a mix of electronic control circuits based on related experience in the manufacture of power leisure cars over the years. 
     SUMMARY OF THE INVENTION 
     One object of this invention is to provide a control circuit push button control and display apparatus for power leisure cars to enable indication of multiple functions such as left and right turn signals, headlamp and obstacle warning light. 
     Another object of this invention is to provide a control circuit push-control and display apparatus for power leisure cars to show the voltage 6-block shifting indication. 
     Still another object of this invention is to provide a control circuit push-control and display apparatus for power leisure cars to incorporate with functions including automatic charge display, warning buzzer and horn. 
     Still another object of this invention is to provide a control circuit push-control and display apparatus for a power leisure car to incorporate it with an electronic type brake release system display function. 
     These and other objects and advantages of the present invention will become apparent to those skilled in the art after considering the following detailed specification together with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of multi-purpose power leisure car of the invention. 
     FIG. 2 is automatic display and control circuit diagram for the control circuit push-control and display apparatus for multi-purpose power car of the invention. 
     FIG. 3 is a first functional line block diagram for the control circuit push-control and display apparatus for an electric leisure car of the invention. 
     FIG. 4 is a second functional line block diagram for the control circuit push button control and display apparatus for a multi-purpose power leisure car of the invention. 
     FIG. 5 is a third functional line block diagram for the control circuit push-control and display apparatus for a multi-purpose power leisure car of the invention. 
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Referring to the drawings, the present invention comprises a leisure car main body 1 and a display panel mounted in front of a main car body 1. The display panel accommodates an automatic display control circuit 2 for showing various functions on the display panel. 
     Referring to FIG. 1, the leisure car main body 1 comprises a car body 11, a pair of front wheels 12 and rear wheels 13, a steering rod 14 and a randomly rotable positioning seat 15, wherein the top of the steering rod 14 has a light-transmission film type push button control display panel 141 and on the leading side a headlamp 142. On respective sides of the car body 11 there is a left turn signal lamp 111, a right turn signal lamp 112, and on the rear side an obstacle lamp 113. Automatic function display will be achieved by means of mechanical control made by a user in conjunction with circuit control on the push button control display panel 141. 
     Referring to FIG. 2, a detailed circuit diagram for the automatic display control circuit of this invention is shown. The operating principle for the left turn lamp, right turn lamp, obstacle lamp and headlamp will be illustrated in conjunction with the block diagram of FIG. 3. 
     When the leisure car is started none of the push buttons are down, signals will be in &#34;L&#34; level output through the inserters 21, 22 and connected to PIN 4 of the inverter 23 and PIN 11 of the inverter 24, respectively, to enable the output of both inserters 23 and 24 to become &#34;L&#34; and then the two output signals will pass by D2 and D3 respectively. Because negative bias voltage disables the power, the negative end of two diodes will each be in &#34;L&#34; level respectively. Further because the two negative ends are connected to the resistors R1, R12 and two input ends of the oscillator 25 respectively, the output of NAND251, 252 of the oscillator will be in &#34;H&#34; level. Also, the power of the relay B and relay C will be disabled due to D2 and D3 &#34;OFF&#34;, whereby the left turn and right turn signal lamps will not light up. 
     When the left turn lamp button SW1 is pressed down, the output of the inverter 21 will become &#34;H&#34; level and the signal connected to U21 PIN 11 of the inverter 23 will enable PIN 13 output to become &#34;H&#34; level and meanwhile RESET &#34;H&#34; level input through D6 to U22 PIN 4 will cause U22 to be disabled. At the moment D2 &#34;ON&#34; signal will be connected to R1 and PIN 13, C17 of NAND251 of the oscillator 25, and the other end of C17 is connected to R13 and R14 respectively while the other end of the two resistors is connected to the input end of NAND 253 and 254 respectively. The output of NAND254 is connected with R13 to form NAND253 input that is connected to PIN 12 of NAND251, PIN 8 of NAND252 respectively. When D2 &#34;ON&#34;, signal will pass by C17, R13, R14, NAND 253, 254, and because of oscillation due to R, C functioning, &#34;H&#34; signal input into U21 PIN 13 will enable NAND251 into action while &#34;ON&#34;/&#34;OFF&#34; as produced by relay B will thus cause the left turn lamp LED26 to flash on and off. 
     When the left turn lamp button SW1 is being pressed down again, the output of the inverter 21 will become &#34;H&#34; to cause U21 PIN 13 &#34;L&#34; that will cause IC, transistor and relay to be disabled. 
     When the right turn lamp button SW4 is being pressed down, the output of the inverter 21 will become &#34;H&#34; and the signal connected to U22 PIN 3 of the inverter 23 will enable PIN 1 output to become &#34;H&#34; and D3 &#34;ON&#34; and because of the oscillation signal produced by the oscillator in conjunction with NAND253, 254, C17, R13, R14, thus, relay C is caused &#34;ON&#34;/&#34;OFF&#34; functioning will then cause the right turn lamp LED27 to flash on and off. 
     When the right turn lamp button SW4 is being pressed down again, the output of the inverter 22 will become &#34;H&#34; to cause U22 PIN 1 &#34;L&#34; to cause IC, transistor and relay to be disabled. 
     When the obstacle lamp button SW6 is being pressed down, the output of the inverter 28 will become &#34;H&#34; and the signal connected to U11 PIN 11 of the inverter 24 will enable PIN 13 output to become &#34;H&#34; and signals will be connected to positive end of D1, D5 to cause D1, D5 &#34;ON&#34;, and negative end of D1 will be connected to R1, the input end of NAND251, C17 and negative end of D2 while the negative end of D5 will be connected to the negative end of D3, R12 and input end of NAND252; when D1, D5 &#34;ON&#34;, because of oscillation signal produced by the oscillator in conjunction with the output of NAND251, 252, thus, relay B, and relay C are thus caused &#34;ON&#34;/&#34;OFF&#34; functioning and then causes the left turn and right turn lamps flashing on and off to give warning function. 
     When the headlamp button SW7 is being pressed down, the output of the inverter 29 will become &#34;H&#34; to cause U12 PIN 1 &#34;L&#34; that will cause Q4 &#34;OFF&#34;, and relay A open. 
     Referring to FIGS. 2 and 4, the present invention includes a drive motor (to be described in a later paragraph). When speed button SW2 is being pressed down, the inverter 31 output will become &#34;H&#34; and the counter 32 will start to count. The counter 32 has a total of 6 sets of outputs respectively connected to the relative outputs on the analogical switch 33. Each of the other ends of the analogical switch 33 is in series with an LED by means of a resistor. Each input end of the analogical switch 33 is in series with a resistor having such OMs as to get decreased following the increase in 5 KVR shunt voltage connected thereto in order to achieve +/-2.5 V varied output. When the power supply is started, the signal will be cleared first by C15 within the counter 32 so as to start counting from Q0, and each press down of the push button will cause the signal to pass by the inverter 31 to clock for counting. Output points from Q0 to Q5 will trigger relative analogical switches to the 6 sets of LED to light up respectively to show the shift number. When Q5 to Q6 &#34;open&#34; to cause the counter to be disabled it provides an idle shift function to keep the main car body in its original state: another press-down--i.e. Q6 to Q7, D4 externally connected to the counter will become &#34;ON&#34; and PIN 15 will give &#34;Clear&#34; signal to cause the main car body to reset counting from Q0. Based on such a cycle modulation, the car may allow the user to select from 6 speeds depending on his or her need. 
     Referring to FIGS. 2 and 5, the automatic charge warning buzzer relates to an automatic warning of big charge LED by the buzzer if a low level appears after a comparison made by the comparator between the reference voltage and operating voltage. If charge clear button SW3 is pressed down, the buzzer will be cut off and the small charge LED will be turn on to retain charge warning function. The function is achieved by a divider circuit 41 consisting of R21 and VR30, and R20 both series with the stable circuit 42 formed by ZD1, through OP voltage stabilizer 43. One end of the stabilizer 43 is in series with each output of R27, R28, R29, R31, R32 to form the comparator 44 and the other input end of the comparator 44 is parallel connected to the divider circuit and the stable circuit, and output end is in series with an LED by virtue of a resistor. The comparator has formed 5 reference levels shown on the display panel by means of the LED, wherein either end of one level is provided for the input of the selector 45, and the other end of the selector 45 is parallel connected to the divider circuit and the stable circuit, and output end is connected to diode D11 and resistor R11; D11 is passing by the inverter 46 that is in series with the small charge LED 47 and buzzer 48, and PIN 11 of the inverter 46 is connected to the oscillator by virtue of analogical switch 49. PIN 3 is connected to the charge button SW3 by virtue of analogical switch 49. R11 is directly in series with the large charge LED 471 and the comparator is designed with 5-block potential (e.g. 15 V, 16 V, 17 V, 18 V, 19 V) while reference potential is pre-defined at 16 V. 
     When the main body potential is higher than 16 V, PIN 1 on output point of the selector 45 will be &#34;L&#34; and PIN 7 will be &#34;H&#34; while the inverter 46 U81 will gain a clear signal to cause the buzzer &#34;OFF&#34;, small/large charge LEDs &#34;OFF&#34; and yet the comparator output end LED will show the potential status in use by the car. 
     When the main body potential is lower than or equivalent to 16 V, PIN 1 on output end of the selector 45 will be &#34;H&#34; and the large charge LED 471 light up to represent potential shortage, and meanwhile PIN 7 output is &#34;L&#34; so that the inverter is enabled, and Clock signal output from U82 PIN1 through the oscillator and analogical switch 49 will cause Q5 in action while cause the buzzer ON/OFF indicating potential shortage to need charge. When the charge clear button SW3 is pressed down, the signal will be input by analogical switch PIN11 and output from U81 PIN13 to cause the small charge LED &#34;ON&#34; and input PIN4 reset by D9 to cause U82 PIN 1 &#34;L&#34;, Q5 &#34;OFF&#34; and buzzer &#34;stop&#34; so as to avoid too much noise, and on the other hand the small charge LED may also serve as a warning function. 
     Referring to FIGS. 2 and 4, when the leisure car body is kept still, DC motor 51 will be disabled by the brake shoes as the brake coil is not functioning due to both ends of brake coil 52 appearing as a positive DC value and therefore the leisure car assumes a braking state. 
     When power supply is started, either end of motor controller 53 is grounded to enable the brake coil to be powered on and the brake shoes are pulled by the DC motor so that the car body will be ready to start. During the start of the car if a driver wants to warn other people near by, he or she presses down SW5 to sound the horn to give a warning function and ensure safety. When the leisure car main body in braking state, if the driver wants to release the brake, SW8 has to be pressed down in order to release the brake causing either end of brake coil grounding so that the brake coil will be powered to pull the brake shoes away and allow the car to move and therefore accomplish solenoid braking and release. 
     When the present invention is being operated, if the user desires to turn left or right, he or she may press down the left turn or right turn signal button on the display panel and directional signal lamp in the front part of the car will light up to warn pedestrians or other vehicles and protect the user. The 6-block shift display will allow the user to know the current gear in use by means of 6-block shift LED on the display panel so as to adjust running speed. The automatic charge warning LED will enable the buzzer to sound and a warning LED on the display panel will light up in case of battery power shortage to advise the user to charge the battery when necessary.