DE4334764A1 - Electric motor car for children - Google Patents

Description

The invention relates to an electric motor vehicle for Children, especially an electric motor vehicle, the is moved by a drive unit, which with an electric motor that is operated automatically is turned when a car body touches an obstacle.

Nowadays, different toy cars are offered that drive manually or automatically. In such a way gen, manually operated car are the front and back Front wheels at the respective ends of the front and rear shafts mounted, which in a base plate of a Cars are arranged. A steering unit is adapted, so that the car body is turned and drive means such for example, a pedal are used to operate the car.

With such a structure of a manually operated car can if the drive unit manually by the leg force of a child who is moving the car forward the. The direction of the car can be controlled by means of controllable wheels to be changed. Hence the car speed depends on the force acting on the drive means. Out of it but this results in a limitation of the car speed,  which makes the child dislike the car that can. It is also difficult if the car is larger is dimensioned in a limited space, for example to drive in a nursery or the like. In addition can when the drive unit of the car through the legs is operated by the child, a small (weak) child who Do not move the car forward as it is large enough Power is required to drive the car.

Alternatively, an automatically operated car can be provided hen an electric motor to drive the wheels which is powered by a battery. That is, the automatic car is constructed in such a way that the car automatically drives by means of the electric motor while it is in one direction is controlled by the steering wheel.

With the car constructed as described above can ever if the child in the car clumsily pushes the steering wheel tends to turn the car incorrectly, causing a Collision with obstacles. According to that Construction of the automatic car will when the car is in is in a steady state, the car is in no rich tion turned, even if the steering wheel is acted on. Furthermore, if the car is disturbed by obstacles, must the driver get out of the car and do it artificially (by hand) turn, which is a disadvantage in the use of the car results. In addition, if the car passes obstacles is disturbed and automatically rotated in one direction, the electric motor that serves as the drive source is overloaded. However, not only will the engine, but it will too Components of the car damaged due to overload that affects the car. At the same time, the Energy consumption of the battery, which affects the operating voltage supply to the car, increasing the life of the battery is reduced.  

Instead, a stroller was used to calm one crying child suggested. Building a derar term stroller is designed so that the stroller from Floor with a constant height by a rope or the same suspended and by curved support elements is worn on its respective lower sides be attached.

With this construction, the stroller in which a baby or Toddler is transported, artificially by an "up passer ". It is consequently disadvantageous that a Assistant is necessary to move the stroller.

The aim of the invention is to provide an improved electric motor to provide a child's car, in which an electromo Tor is used for driving by a tax unit for automatic operation of the car along a desired direction is controlled by a Control unit is fixed, and an obstacle vice versa hen that is positioned in the direction of travel, even if a main body of the car be the obstacle stirs.

Another object of the invention is an elek to provide a motorized car for children that like a Baby stroller runs and automatically turns into one Direction of travel turns when the car body obstacles stirs.

Another object of the invention is to provide an electromo to provide a toric car that has an electric control unit that has the speed of a drive source serving electric motor controls the Bela stung checked on the engine to drive the car acts, which produces different melodies, which the Represent the car's operating status and that is overloading  and fully discharging a rechargeable battery prevents the car from operating voltage.

In order to achieve the aforementioned goals, an electric motor vehicle for children is provided according to a preferred embodiment of the invention, with:
a car body having a pair of front wheels and rear wheels which are attached to front and rear shafts from the bottom plate thereof, the wheels being driven arbitrarily for moving the car, the front wheels are in a non-contacting relationship with the ground and the rear wheels are Touch the ground,
a driving seat for a driver, the seat being arranged on an upper side of the vehicle body,
Steering means having a steering wheel for changing the direction of travel of the wagon, and steering force transmission means for receiving the steering force generated by the steering wheel, the steering wheel being arranged on a front side of the driving seat,
electric motor drive means built into the car body to generate a driving force necessary for the car to travel,
Drive means for operating the car along the direction controlled by the steering wheel and for automatically changing the direction of travel of the car before an increased load on the car body,
rechargeable energy supply means for supplying the operating voltage to the car and
Control means for generating various melodies when operating the car, changing the speed of the electric drive means and when setting the overcharge and total discharge the energy supply means.

According to a preferred aspect of the invention, the control means further comprise a steering wheel for controlling the vehicle body, a steering shaft which is integrally connected to the steering wheel and has the steering force transmission element which is connected to the steering shaft for transmitting the steering force from the steering wheel to the drive means, and a first driven gear that engages firmly in a lower end of the steering shaft and
a second driven gear for transmitting the steering force from the steering wheel to the drive means and for transmitting the driving force from the drive means to the steering wheel.

According to a further aspect, the drive means comprise large gear that meshes with a small gear, wel ches on a drive shaft of the electronic drive motors is attached, for transmitting the driving force of the rotor, the large gear being made of a spiral Gear is assembled and the small gear off a worm wheel, a horizontal and one vertical bevel gear, which is in a mutually ge crossed or intervene perpendicular to each other and be rotated by means of a shaft which is firmly attached to the big gear, a couple of steerable wheels, which are mounted on the respective ends of a jacking axis and be driven by the bevel gear where the propulsion axis is fixed by a Center of the vertical bevel gear; and a Ge Housing with a shaft insertion opening that is at the center of an upper projection thereof, a gear, which is fixed on a circumference of the upper projection, and a drive shaft insertion opening on a front given position on a lower side thereof the gear wheel is driven circumferentially into the second Gear of the steering means engages and the bevel gear be accommodated in the housing, the housing being through the load on the steerable wheels is turned, too takes when the car is affected by obstacles.

The driving seat preferably comprises a seat for the driver, a footstool on a front side of the seat, which is divided by a partition, and a seat back  backrest, which is formed on a rear side of the seat det.

The control means according to the invention comprise an oscil generator for generating a cyclic loading signal for the En energy supply means, an overcharge protection circuit area for detecting an overloaded state of the energy supply medium, a charge level detector for checking the charge driving state of the energy supply means, a speed speed control device for setting the speed the electrical drive means, a microprocessor for Generate various melodies when the car is running and to output a control signal for driving the electric drive means, drive means for driving of the electrical drive means by the microprocesses sor controlled and a fully discharge detector to detect a completely discharged state of the Energy supply means.

According to another embodiment of the invention, there is provided a stroller-type electromotive stroller having a stroller body having a pair of front wheels attached to both ends of a front and rear shaft and a pair of rear wheels attached to both ends of a rear shaft Shaft are mounted with the front wheels in a non-contact relationship with the ground while the rear wheels touch the ground;
a bed having a seat back;
electric drive means, which are built into the car body, for generating a driving force which is necessary for the advancement of the car;
Drive means for freely moving the carriage and automatically changing the carriage traveling direction before the loading of the carriage body in the current carriage traveling direction, chargeable energy supply means, for supplying the operating voltage to the carriage; and control means for generating various melodies when operating the car, changing the speed of the electric drive means and determining the overloading and total discharging of the energy supply means.

According to the invention, the drive means comprise a large one Gear that meshes with a small gear that is on befe a drive shaft of the electronic drive motor is transmitted to transmit the driving force from the type drive means, the large gear from a spiral convey moderate gear and the small gear consists of a worm wheel and a horizontal one and a vertical bevel gear, which in one against mutually crossed or mutually perpendicular direction engage and be rotated by means of a shaft that fixed attached to the large gear, a few steerable Wheels on the respective ends of a jacking axle be mounted and driven by the ball gear be, whereby the jacking axis is fixed by a center of the vertical bevel gear; and a Housing with a shaft insertion opening that is at the center is formed by an upper projection thereof, a ge serrated gear on a circumference of the upper projection is determined, as well as a drive shaft insertion opening, that at a given position on a lower side of which is formed, the bevel gear in the Housing are included and the housing through the Bela steering wheel is rotated, which increases when the car is affected by obstacles.

The driving seat preferably comprises a seat for the driver, a footstool on the front of the seat, which by a dividing element is divided and a seat backrest, which is formed on a rear side of the seat.

In a further development according to the invention, the taxes include determine an oscillator for generating a cyclic Loading signals for the energy supply means, an overload  Protection circuit area for detecting an overloaded State of the energy supply means, a state of charge detector to check the charging status of the energy supply with tel, a speed control device for fixing the speed of the electric drive means, one Microprocessor for creating different melodies Operation of the car and for issuing a control signal for driving the electric drive means, driving with tel to drive the electrical drive means, the controlled by the microprocessor, and a full constantly discharge detector to detect a complete discharged state of the energy supply means.

With the invention constructed as described above, drives the electromotive car through an electromotive Drive motor that serves as an electrical drive with a tune under the control of a micropro cessors is generated. If the car is through obstacles is influenced, which are positioned in the direction of travel and an excessive torque on the connection of the hori zontal and vertical bevel gear is applied, the housing containing the controllable wheels becomes full constantly rotates in a direction in which the moment is decreased.

The above and other objects, features and advantages of the invention are described in conjunction with the accompanying drawings. It shows:

Fig. 1 is a perspective view which schematically shows an appearance of an electric motor vehicle for children according to a preferred embodiment of the invention;

Figure 2 is a side cross-sectional view of a carriage shown in Figure 1;

Fig. 3 is an exploded perspective view of a steering unit shown in Fig. 2;

Fig. 4 is an exploded perspective view of a drive unit shown in Fig. 2;

Fig. 5 is an enlarged cross-sectional view of a main part of a connector of the steering and the drive unit which is shown in Figures 3 and 4 Darge.

Fig. 6 is a circuit diagram of an electrical circuit device for the car according to the invention;

Fig. 7 is a detailed circuit diagram of a control circuit shown in Fig. 6;

Fig. 8 is a perspective view schematically showing an appearance of a stroller-type electromotive stroller for toddlers according to another embodiment of the invention;

FIG. 9 is a schematic view illustrating a modified example of a carriage of FIG. 8 and

Fig. 10 is a schematic side view of a drive unit of the embodiment shown in Fig. 8.

Preferred embodiments of the Invention in more detail with reference to the accompanying Described drawings.

Referring to Fig. 1, which puts a schematic SentinelS OF form of an electromotive cart according to an OFF operation example illustrating the invention, reference numeral 10, a structure of an electric motor car. The vehicle body 10 has a driver's seat 12 which is fixed in the rear part on the upper side thereof. The steering seat 12 includes a seat 14 on which a driver or a child can control a steering wheel, as will be described later. On a front side of the seat 14 , a foot bench 16 with a constant height, based on the upper level of the seat 14, is divided by a separating element 18 and a seat back 20 is formed on the rear of the seat 14 . On a front panel (not shown) at the front of the seat 14 , an on / off switch 22 and a speed controllable switch 24 are arranged for setting a speed of an electric motor drive which serves as an electrical drive means. On a lower periphery of the car body 10 , a shock absorbing member 32 is provided, for example, is made of rubber, so that a shock is absorbed, which is transmitted to the car 10 when colliding with obstacles, and damage to the car is avoided .

Referring to FIG. 2 is a side cross-sectional view of the fact of the electromotive carriage of FIG. 1. On the front and rear of the car body 10 , a pair of front wheels 34 are arranged in contactless relationship with the ground and a pair of rear wheels 36 are in contact with the ground. These wheels 34 and 36 are driven arbitrarily, so that they help the Wa genbau 10 when it travels in a direction controlled by the steering wheel 28 . The car body 10 is provided with a frame 38 which divides the interior space of the car body, which is defined between the front wheels 34 and the rear wheels 36 .

A steering unit 26 is arranged on an upper side of the frame 38 in order to change the direction of the car body 10 . The steering unit 26 includes a steering wheel 28 which is operated manually by the driver so that the car body 10 is steered, and a steering shaft 30 which interacts with a steering handle 28 . In addition, the steering unit has a steering force transmission element 40 , which receives a steering force from the steering shaft 30 and transmits the force to a drive unit 52 , which will be described later, and a first and a second driven gearwheel 42 and 44 .

The drive unit 52 is connected to the steering unit 26 by the driven gears 42 and 44 . At the drive unit is driven by a driving force from the elec tric drive motor 54 so that the car body 10 is driven in a direction which is set by the steering unit 26 and that the driving direction is automatically changed when the car body 10 touches an obstacle. The drive unit 52 has a large gear 58 , for example a spiral gear which receives the driving force from the electric drive motor 44 , and a horizontal bevel gear 62 which is fastened to a shaft 60 which serves as the central axis of the large gear 58 . In addition, the unit 52 has a vertical bevel gear 64 which engages in the horizontal bevel gear 62 . The horizon tal and the vertical bevel gear 62 and 64 are accommodated in a housing 66 which can be rotated about the shaft 60 when the car body 10 is influenced by an increased load due to an obstacle. A couple of steerable wheels 72 are attached to a central axis of the vertical bevel gear 64 , ie both ends of an axis 70 extend through insertion openings 68 which are formed on the opposite sides of the housing 66 .

FIGS. 3 and 4 show exploded perspektivi specific views showing main parts illustrating the steering unit 26 and the drive unit 52.

Fig. 5 shows an enlarged cross-sectional view illustrating the associated steering unit 26 and the drive unit 52. In particular the steering wheel of the steering unit 26 to the outside through the upper surface of the car body 10 is facing, so that the driver can handle the steering wheel 28 to steer the car body 10th The steering wheel 28 is integrally provided with the steering shaft 30 , which transmits the steering force which is applied to the steering wheel 28 on one side of the drive unit 52 .

As shown in Figs. 3 and 5, the steering shaft 30 includes an upper steering shaft 30 a and a lower steering shaft 30 b that are mutually coupled by a spring 40, which as interposed therebetween serves Lenkkraftübertragungsele ment. In other words, a spring receiving space 46 is formed at a lower end of the upper steering shaft 30 a or at an upper end of the lower steering shaft 30 b. At a central area of the respective spring receiving space 46 , a spring mounting projection 48 is fixed, which has a spring mounting groove 50 , so that the respective ends of the spring 40 are inserted into the corresponding spring mounting groove 48 to transmit the steering force from the steering wheel 28 to the drive unit 52 . Furthermore, the lower steering shaft 30 b engages at its lower end in the first driven gear 42 , which is connected to the two-th driven gear 44 . This second driven gear 44 engages in a gear 74 on an upper periphery of the housing 66 in the drive unit 52 , so that the steering force from the steering shaft 30 to the drive unit 52 or transmitted in opposite directions.

In the drive unit 52 , the shaft 60 runs vertically through the frame 38 . On the upper end of the shaft 60, the large gear comprising a helical gear 58 is fixed, while a vertical bevel gear 62 is fixed to the lower end of the shaft 60 which engages a horizontal bevel gear 64th The large gear wheel 58 engages in a small gear 56 , which comprises a worm gear, which transmits the driving force of the electric motor 54 to the drive unit 52 . The horizontal and vertical bevel gears 64 and 62 are accommodated in a housing 66 which has an interior in which the gears 62 and 64 can rotate. In addition, the housing 66 has a gear 74 , which is in particular provided with teeth and / or thread, and which is fixed to the upper periphery. A shaft insertion opening 76 through which the shaft 60 is inserted is formed at an upper center of the housing 66 . Furthermore, axis insertion openings 68 are opened on the opposite side of the housing 66 bottom and the axis 70 is inserted firmly, which runs through the center of the vertical bevel gear transmission 64 . That is, the ends of the axle 70 extend out into the exterior of the housing 66 through the axle insertion opening 68 and are mounted on the steerable wheels 72 . Furthermore, a bearing 78 is arranged in the shaft insertion opening 76 , so that a smooth or even rotation of the shaft 60 is ensured, and a standing support 80 is formed at a center of the shaft 60 , so that the shaft is prevented from moving away becomes.

Fig. 6 is a circuit diagram showing an electrical, circuit according to the invention. In the drawing, a connector 100 is connected to a charger 102 from one side of a conventional AC power supply for charging the rechargeable battery 108 . The battery 108 serves as an energy supply source and an output side 104 of the charging device 102 is connected to a pole 106 on one side of the battery 108 . In addition, the power switch 22 of FIG. 1 is connected to the battery 108 and a control unit 110 which controls the speed of the motor 54 and generates various melodies. The control unit 110 is adapted such that it controls the overcharging and complete discharge of the battery 108 . A speaker SP, e.g. B. a piezo speaker, is connected to the control unit 110 .

In the electrical arrangement shown in FIG. 6, the connection 100 with the AC power supply and the output 164 of the charging device 102 , which is connected to the connection 100 , is coupled to the pole 106 of the battery 108 , so that the battery 108 is charged. When the power switch 22 is closed, the motor 54 is driven and at the same time the melodies are reproduced frequency by the speakers SP, controlled by the control unit 110 .

Referring to FIG. 7, a detailed circuit diagram of the control unit 110 is shown. In the drawing, an emitter of a PNP transistor Q1 is connected to the pole 106 for charging the battery 108 in a cyclic charging manner. The transistor Q1 is connected with its collector to the rechargeable battery 108 and with its base to the overcharge protection region 114 , so that the battery 108 is prevented from being overcharged (overcharged). The base of transistor Q1 is also connected to an oscillator 116 , which drives transistor Q1 to switch, so that the battery 108 is cyclically charged. In the drawing, a diode, generally designated D3, is adapted to prevent reverse current flow to the pole 106 from the battery 108 .

According to the invention, the overcharge protection area 114 is composed of resistors R1 and R2 connected in series, for detecting an overcharge level of the battery 108 , and an inverter IV1, which has an input connected to a branch point between the resistors R1 and R2, and a diode D1 which is reversibly connected to the inverter IV1. The oscillator 116 contains inverters IV2 and IV3 which are connected in series with the diode D1 of the overcharge protection area 114 , time-constant elements R3, R4 and C1 which are connected in parallel with the inverters IV2 and IV3, and a switching transistor Q2, the base of which is connected to the output of the inverters IV3 through a resistor R5 and the collector of which is connected to the base of the transistor Q1 through a resistor R6.

A voltage regulation region 118 , which includes a voltage regulator VC1 and a smoothing capacitor D2, is connected to the battery 118 by a current switch 22 , so that the energy voltage output of the battery 118 is regulated to an operating voltage Vcc (+ 5 V) which is necessary for the operation of the Car is necessary.

Furthermore, an overcharge detection region 120 is connected to the battery 108 for completely discharging the battery, for detecting a dropped voltage level of the battery 108 . The overcharge detection region 120 has resistors R7 and R8 for setting the full discharge level, two inverters IV4 and IV5 which are connected in series with a branch point between the resistors R7 and R8 and a resistor R9. The inverters serve as buffers.

A charge detector 122, which has resistors R10 and R11 connected in series, for detecting an input of a charge voltage in a battery charging mode, is connected to the pole 106 .

According to the invention, a 1-chip microprocessor 26 has a plurality of input / output connections PA0 to PA3 for receiving various input signals and for outputting control signals. In particular, the port PA2 of the microprocessor 124 receives a charge detection signal from the charge detector 122, thereby preventing the truck body 10 from moving during the battery charging mode. The connection PA3 of the microprocessor 124 is connected to the output of the overload detection area 120 and its connection PA0 to an engine speed setting area 126 . This region 126 is composed of a variable resistor VR1, which is assigned to the speed control switch 24 in FIG. 1, a resistor R12 and a capacitor C3. Furthermore, the microprocessor 125 has connections OSC1 and OSC2 which are connected to a conventional quartz oscillator, so that clock signals are obtained. The motor speed setting section 126 functions such that a charging time of the capacitor C3 is provided, which is changed by the variable resistor VR1 with reference to a reference value (threshold value) previously set as a motor speed signal within a range of the charging voltage of the capacitor D3 which in turn is fed to the microprocessor 124 .

In addition, the microprocessor 124 has a plurality of output connections PB0 to PB7 which are connected to corresponding resistors R13 to R20 which comprise a D / A converter 128 which converts the melodies or the alarm signal from the microprocessor 124 to a voltage level. In the D / A converter 128 , the resistance of the respective resistors R13 to R20 is preferably set such that the maximum value of the resistor is twice as large as its minimum value. The D / A converter 128 is connected to the base of a transistor Q3 through a capacitor C5 and a resistor R21 and a loudspeaker SP is connected to a collector of the transistor C3, which base is also connected to an output of the overcharge detection region 120 , through a pull-up counter stood R22.

A motor driver 130 is connected to the port PA2 of the microprocessor 124 to drive the motor 54 based on the speed set by the motor speed setting range 126 . The motor driver 130 includes a transistor Q4 with a base, which was connected to the terminal PA2 of the microprocessor 124 through an opposing R23 and a transistor Q5, which has a base, which is connected to the collector of the transistor Q4 through a resistor R24 and one Collector that is connected to one end of the motor 54 . The controller 130 further includes a transistor Q6 having a base connected to the other end of the motor 54 and having a collector which receives the power voltage through a resistor R25, and a transistor Q7 having a base connected to the collector of the Transistor Q6 is connected through a resistor R27. The transistor Q7 is switched on / off by a control signal output from the connection PA1 of the microprocessor 124 and serves to dampen the melody output from the microprocessor 124 . A resistor R26 is arranged at a connection point of the motor 54 to the base of the transistor Q6, so that an overload is detected which acts on the motor 54 . Diodes D4 and D5 for removing a surge are connected in parallel between the motor 54 and the transistor Q4.

An operation of the control circuit 110 thus constructed will now be described in detail.

In battery charging mode, when the output 104 of the charging device 102 is coupled to the pole 106 , the reversing circuit breaker 112 is opened. Essentially, when the battery 108 is initially charged, the level of overcharge is set to a low level by the resistors R1 and R2 of the overcharge protection region 114 , and thus the inverter IV1 outputs a high level. Under this condition, the oscillator 116 outputs a signal depending on a time constant set by the resistor R4 and the capacitor C1, and the transistor Q2 is switched on / off in accordance with the signal supplied from the oscillator 116 . Subsequently, the transistor Q1 is also switched on / off in accordance with the switching on / off of the transistor Q2, so that the battery 108 can be charged with a DC voltage in a cyclic charging manner, with the result of an extended service life and improved charging efficiency of the battery 108 . At this time, the microprocessor 124 receives the signal representing the battery charging mode of the resistors R10 and R11 and inhibits the movement of the car during the battery charging mode.

When the charged level of the battery 108 rises above the value set by the resistors R1 and R2 of the overcharge protection area 114 , the output of the inverter IV1 is set to a low level. Accordingly, the diode D1 is turned on and the oscillator 116 is thus stopped, thereby completing the battery charging mode.

After the battery charging mode is ended, the charged voltage of the battery 108 is gradually discharged by turning on the power switch 22 and the voltage is supplied to the voltage regulator 118 through the power switch 22 and the diode D2. The voltage regulator 118 converts the voltage discharged from the battery 108 into a voltage level that is necessary to operate the respective circuit component.

Then, when the microprocessor 124 detects no connection of the charger 102 to the battery 108 , ie, the end of the battery charging mode, based on the signal supplied from the resistors R10 and R11, it determines the charging threshold level Vth of the capacitor C3 Reference to the time constant set by the variable resistor R1 of the motor speed setting range 126 so that the set speed of the motor 54 is read. In other words, if the charging time of the capacitor C3 is lengthened relative to the charging position level, then the microprocess 124 determines that the speed of the motor 54 is high. On the other hand, when the charging time of the capacitor D3 becomes shorter, the microprocessor 124 determines that the speed of the motor 54 is low.

Next, the microprocessor 124 sequentially outputs the previously programmed melodies through the D / A converter 128 to the transistor Q3, which in turn drives the speakers SP, to reproduce the melody. At this time, the microprocessor 124 generates a PWM motor drive signal through the connection PA2 to the transistor Q4, which in turn is turned on to drive the transistor Q5 and thereby operate the motor 54 . As a result, the car can be driven by the engine 54 .

In this state, when the motor 54 is overloaded by obstacles, a current across the resistor R26 rises (ie V = I × R) and the transistor Q6 is thus turned off. Accordingly, the potential of the connection PA1 of the microprocessor 124 rises to a high level. The microprocessor 124 thus determines the overload acting on the motor 54 and then sets the output of the port PA2 to a low level. In this case the transistor is switched off and the motor 54 is thus stopped.

When the motor 54 is stopped, the microprocessor 124 intermittently outputs the motor drive signal through the terminal PA2 to check the current level present at the resistor R26, so that the escape of the overload acting on the motor 54 is determined. As a result, when the motor 54 is operated under its rated load, the transistor Q6 is turned on and then the microprocessor 124 outputs the melody signal through the output terminals PB0 to PB7.

Meanwhile, when the voltage of battery 108 drops and becomes less than a predetermined level referred to with the battery 108 fully discharged, the output of the buffer comprising inverters IV4 and IV5 is set low, which in turn represents the input of port PA3 of microprocessor 124 . Accordingly, the microprocessor 124 generates an alarm, which represents the complete discharge state of the battery 108 , through the output terminals PB0 to PB7, instead of the output of the melo. The alarm signal may sound even if a melody switch 134 is opened. Alternatively, when the melody leads-off switch 134 is closed, the micro-processor 24, the High-level signal to the transistor Q7 through the terminal PA1 to, so that the melody is attenuated.

In such an overcharge condition, when the DC charger 112 is connected to the battery 108 (see FIG. 6), the cyclic charge mode for the battery 108 is performed as described above and the battery charge detected by the resistors R10 and R11. Voltage level entered simultaneously at the port PA2 of the microprocessor 124 . Then the microprocessor 124 inhibits the outputs of the connections PA0, PA1, PA2 and PA3, so that the movement of the carriage is stopped.

The operation of the car according to the invention will now be described ben.

For example, if the driver sits a child on the seat 12 and confirms the power switch 22 , the melody is sounded by the control by means of the microprocessor 124 and the motor control 130 drives the motor 54 based on the speed by the motor speed -Setting area 126 was set exactly. Thus, the small gear 56 coupled to the motor 54 is driven so that the large gear 58 is rotated, for example, a spiral gear. By rotating the large gear 58 , the shaft 60 and the horizontal bevel gear 62 are rotated so that the vertical bevel gear 64 , which cooperates with the horizontal bevel gear 62 , drives the wheel shaft 70 to be rotated. Accordingly, the steerable wheels 62 are rotated and the carriage is moved forward.

In operation, when the car is over obstacles such. B. touches a door frame or furniture, a torque on the connection between the vertical and horizontal cone wheel-driven 62 and 64 applied in the housing 66 , so that the housing 66 , which contains the steerable wheel 72 rotated in a torque direction and changed the direction of travel of the car becomes.

Assuming that the car is not rotated in one direction due to the obstacles and the load acting on the motor 54 , undesirably increases, the overload condition of the motor 54 can be detected due to the variation of the current across the resistor R26 and the transistor R6 is thus turned on. In this case, the motor drive level output at the terminal PA2 of the microprocessor 124 is changed to a low level, so that the motor 54 is inhibited. With motor 54 overloaded, microprocessor 124 checks the level of current applied to resistor R26 (ie, the condition of transistor Q6 to be turned on). As a checked result, when the overload is removed from the motor 54 , a high level signal is then output from the microprocessor 124 through the port PA2 so that the car drives normally.

Meanwhile, the steering wheel 28 protruding upward on the car body 10 at the front of the seat 12 is used to change the driving direction of the car. The steering force of the steering wheel 28 is transmitted to the upper steering shaft 30 a and the spring 40 , the upper and lower ends of which are fixed to the spring receiving space 46 , which between the lower side of the upper steering shaft 30 a and the upper side of the lower steering shaft 30 b is set. Thus, the spring 40 is rotated in the direction of the steering rotation direction and the lower steering shaft 30 b also engages in the spring 40 . Consequently, the first driven gear 42 which is coupled to the lower end of the lower steering shaft 30 b be driven so that the second driven gear 43 which engages in the first driven gear 42 and the cylindrical gear 74 which is on the lower side of Ge formed häuses 66 is rotated so that the housing is rotated 66th As a result, the car can be turned in one direction.

During the operation of the car, the microprocessor 124 always checks the overcharging of the battery 108 . When the overcharge of the battery 108 is detected by the overcharge detector 120, the microprocessor 124 dampens the melody so that the alarm signal is output which indicates the overcharge state of the battery. When the DC adapter is connected to the pole 106 for charging the battery 108 , the microprocessor 124 inhibits the movement of the motor 54 and controls the cyclical charging mode for the battery 108 , while the overcharging of the battery 108 is checked by the overcharge protection area 120 . After the end of the cyclical charging mode for the battery 108 , the car runs like that, corresponding to the switching on of the power switch 22 .

As noted above, according to the present invention, the car can be automatically turned in one direction by the drive unit 52 even if it touches obstacles. As a result, the car can run effectively even in a small space. In addition, since the car body has seen a seat 12 therein, the driver can sit securely in the seat 12 .

Next, a second embodiment of the Er described.

Fig. 8 shows an electric motor car, which is designed as Kin derwagen. Fig. 9 shows a modified example of the second embodiment in Fig. 8, in which a drive unit is arranged on the underside of the front of the car and Fig. 10 schematically illustrates the drive unit which is used in the example of Figs. 8 and 9 .

Referring to FIGS. 8 and 9, the steering unit 26 is for example removed from the structure of the first execution described above and the seat 12 is passed through a bed he puts in which a baby can lie. In the construction of the second embodiment of the invention, the stroller can be operated automatically by attaching the same control unit as in the first embodiment, but without the operation of the steering unit. Similarly, in this embodiment, the child carriage can rotate in one direction when it touches the obstacles, as described below.

First, the drive unit 52 , which is coupled to the motor 54, has a small driven gear 56 mounted on the shaft of the motor 54 , as shown in FIG. 10. A shaft 60 is rotatably mounted on a central region of the large gear 58 and shaft mounting bearings 82 a and 82 b are arranged on both sides of the large gear. The shaft 60 extends vertically through a shaft hole 76 formed on the top of the housing. A horizontal bevel gear 62 is fixed to the lower end of the shaft 60 by a pair of shaft mounting bearings in the housing 66 . Furthermore, a spacer 84 is fitted between the shaft mounting bearing 78 and the horizontal bevel gear 62 , so that the horizontal bevel gear 62 is prevented from moving upward. A vertical bevel gear 64 is connected to the horizontal bevel gear 62 and a wheel shaft 70 is inserted into a center of the vertical bevel gear such that it projects beyond the outside of the housing 66 .

Furthermore, a pair of steerable wheels are attached to both ends of the wheel shaft 70 . The small 56 and the large gear 58 are accommodated in a gear box 88 which is fastened to the carriage body 10 by means of screws 86 . Bearing elements 90 to ensure a uniform rotation of the wheel shaft 70 are provided on opposite sides of the housing 66 through which the wheel shaft 70 extends.

Furthermore, the stroller has an electrical circuit, which corresponds to that from the first exemplary embodiment (see FIGS. 6 and 7), which provides a tune during operation of the stroller, which prevents the battery 108 from being overcharged and completely discharged, which prevents the motor 54 controls and provides for automatic direction control when touching obstacles.

The stroller is now in accordance with the second embodiment Game of the invention described.

By turning on the power switch 22 , the motor 54 is operated and the car drives while the melody sounds through the loudspeaker SP, controlled by the microprocessor 124 . In accordance with the operation of the motor 54, the fixed to the shaft of the motor 54 small gear 56 with the large gear 58 cooperates, and the shaft 60 which is connected to the large gear 58 is rotated at closing. As a result, the horizontal cone gear 62 is rotated in the housing 66 by the shaft 60 . As a result, the wheel shaft 70 is rotated so that the steerable wheel 72 is operated, thereby driving the stroller body (ie, the stroller).

While the stroller is in motion, when the stroller body 10 contacts an obstacle and the load on the motor increases too much, the housing 66 rotates in a direction in which the load on the motor decreases so that the stroller body 10 can run continuously . At this time, the microprocessor 124 checks the load on the motor 54 so that the motor 54 is prevented from running under an overload condition as described in FIG. 7. After the overloading of the motor 54 ceases, the car body 10 moves, controlled by the microprocessor 124 .

As described above, according to the inventions inventive electromotive car, since the car automa table runs through the electric motor, the parents which at least one child will have more free time. In addition can, since the car starts operating different melodies shines, the child's emotion can be improved.

Although the invention relates to specific embodiments examples have been described, it should be noted that various modifications and changes can be made nen without departing from the scope of the invention. E.g. can be a pedal that is coupled to the variable resistor is located on the underside of the front of the seat hen be controlled so that the carriage speed becomes. In addition, an obstacle detection sensor can be used to turn the cart before the cart turns on Touched obstacle.

Claims (10)

1. Electric motor vehicle for children, especially small children with:
a carriage body ( 10 ) having a pair of front wheels ( 34 ) and hind wheels ( 36 ) attached to a front and rear side by a bottom plate thereof, the wheels being driven arbitrarily to propel the carriage, the front wheels in one have a contactless relationship with the ground and the hind wheels touch the ground;
a driver seat ( 14 ) for an operator, the seat being located on an upper side of the vehicle body ( 10 ); Steering means ( 26 ) having a steering wheel ( 28 ) for changing the direction of travel of the wagon, and steering force transmission means ( 40 ) for receiving the steering force generated by the steering wheel ( 28 ), the steering wheel ( 28 ) on a front side of the driver's seat ( 14 ) is arranged;
electromotive drive means ( 54 ) built into the carriage body ( 10 ) to produce a driving force necessary for the carriage to travel;
Drive means ( 52 ) for operating the carriage along the direction controlled by the steering wheel ( 29 ) and for automatically changing the carriage driving direction before an increased load on the carriage body ( 10 );
rechargeable energy supply means ( 108 ) for supplying the operating voltage to the carriage; and
Control means ( 110 ) for generating various melodies when operating the car, changing the speed of the electric drive means ( 54 ) and determining the overloading and total discharge of the energy supply means ( 108 ). 2. Electric motor vehicle according to claim 1, characterized in that the steering means ( 26 ) further comprises a steering shaft ( 30 ) which is integrally connected to the steering wheel ( 28 ) and the steering force transmission element ( 40 ) having the steering shaft ( 30 ) for To carry the steering force from the steering wheel ( 28 ) to the drive means ( 52 ) is connected, as well as a first geared gear ( 42 ) which engages firmly in a lower end of the steering shaft ( 30 ) and a second driven gear ( 44 ) , to transmit the steering force from the steering wheel ( 28 ) to the drive means ( 52 ) and to transmit the drive force from the drive means ( 52 ) to the steering wheel ( 28 ). 3. Electric motor vehicle according to claim 2, characterized in that the steering force transmission element from a spring ( 40 ) and the steering shaft ( 30 ) from an upper ( 30 A) and a lower steering shaft ( 30 B) be, each of the upper and lower Steering shafts ( 30 A, 30 B) has a spring receiving space ( 46 ) with a spring fastening projection ( 48 ) and the pre jump ( 48 ) comprises a spring fastening groove ( 50 ) for fastening the respective ends of the spring ( 40 ). 4. Electric motor vehicle according to claim 1, characterized in that the drive means ( 52 ) comprise:
a large gear ( 58 ) meshing with a small gear ( 56 ) which is mounted on a drive shaft of the electric drive motor ( 54 ) for transmitting the driving force from the drive means ( 52 ), the large gear ( 58 ) being made of one spiral gear is assembled and the small gear ( 56 ) consists of a worm gear;
a horizontal ( 64 ) and a vertical bevel gear (bevel gear) ( 62 ) which engage in a mutually crossed or mutually perpendicular direction and are rotated by means of a shaft ( 60 ) which is fixed to the large gear ( 58 ) is attached;
a pair of steerable wheels ( 72 ) which are mounted at the respective ends of the propulsion axle ( 70 ) and driven by the bevel gear transmissions ( 62 , 64 ), the propulsion axle ( 70 ) being fixedly attached by a center of the vertical bevel gear transmission bes ( 62 ); and
a housing ( 66 ) having a shaft insertion opening ( 76 ) formed at the center thereof by an upper protrusion thereof, a gear ( 74 ) fixed to a circumference of the upper protrusion, and a drive shaft insertion opening ( 68 ) before, which is formed at a predetermined position on a lower side thereof, the gear ( 74 ) engaging circumferentially in the second driven gear ( 44 ) of the steering means ( 26 ) and the bevel gear ( 62 , 64 ) in the housing ( 66 ) are added, the housing ( 66 ) being rotated by the load on the steerable wheels ( 72 ), which increases when the carriage is influenced by obstacles. 5. Electric motor vehicle according to claim 1, characterized in that the control means ( 110 ) comprise:
an oscillator ( 116 ) for generating a cyclic loading signal for the energy supply means ( 108 );
an overcharge protection circuit area ( 114 ) for detecting an overloaded state of the energy supply means ( 108 ); a state of charge detector ( 122 ) for checking the state of charge of the energy supply means;
speed control means ( 126 ) for setting the speed of the electric drive means ( 54 );
a microprocessor ( 124 ) for generating various melody tones when the car is operating and for outputting a control signal for driving the electric drive means ( 54 );
Control means ( 130 ) for driving the electrical drive means ( 54 ) controlled by the microprocessor ( 124 ); and
a complete discharge detector for detecting a completely discharged state of the energy supply means ( 108 ). 6. Electric motor vehicle according to claim 5, characterized in that the control means ( 130 ) comprise:
a resistor through which a high current flows when the electrical drive means ( 54 ) are overloaded and a switching transistor which is switched to be conductive, corresponding to the increased current at the counter, so that the overload of the electrical drive means ( 54 ) to the microprocessor ( 124 ) will carry over. 7. Electromotive stroller type with:
a car body ( 10 ) having a pair of front wheels ( 34 ) and rear wheels ( 36 ) attached to a front and rear side by a bottom plate thereof, the wheels being driven arbitrarily to propel the car, the front wheels in a non-contact manner Stand in relation to the ground and the hind wheels touch the ground;
a bed ( 12 ) having a seat back;
electric drive means ( 54 ), which are built into the car body ( 10 ), for generating a driving force which is necessary for the advancement of the car;
Drive means ( 52 ) for freely moving the carriage and automatically changing the carriage direction before the load on the carriage body ( 10 ) increases in the current carriage direction;
rechargeable energy supply means ( 108 ) for supplying the operating voltage to the carriage; and
Control means ( 110 ) for generating various melodies when operating the car, changing the speed of the electric drive means ( 54 ) and determining the overloading and total discharge of the energy supply means ( 108 ). 8. Electric motor vehicle according to claim 7, characterized in that the drive means ( 52 ) comprise:
a large gear ( 58 ) meshing with a small gear ( 56 ) which is mounted on a drive shaft of the electric drive motor ( 54 ) for transmitting the driving force from the drive means ( 52 ), the large gear ( 58 ) being made of one spiral gear is assembled and the small gear ( 56 ) consists of a worm gear; a hori zontales ( 46 ) and a vertical bevel gear ( 62 ) which engage in a mutually crossed direction and rotated by means of a shaft ( 60 ) who is firmly attached to the large gear ( 58 );
a pair of steerable wheels ( 72 ), which are mounted at the respective ends of a propelling thing ( 70 ) and driven by the bevel gear ( 62 , 64 ) who, with the propelling axis ( 70 ) fixedly attached, through a center of the vertical bevel gear Gear ( 62 ); and
a housing ( 66 ) having a shaft insertion opening ( 76 ) formed at the center by an upper projection thereof,
a gear ( 74 ) which is fixed to a periphery of the upper projection, and a Vortriebsach se insertion opening ( 68 ) which is formed at a predetermined position on a lower side thereof, the bevel gear ( 62 , 64 ) in the Housing ( 66 ) are received and the housing ( 66 ) is rotated by the load on the steerable wheels ( 72 ), which increases when the carriage is affected by obstacles. 9. Electric motor vehicle according to claim 7, characterized in that the control means ( 110 ) comprise:
an oscillator ( 116 ) for generating a cyclic loading signal for the energy supply means ( 108 );
an overcharge protection circuit area ( 114 ) for detecting an overloaded state of the energy supply means ( 108 );
a state of charge detector ( 122 ) for checking the state of charge of the energy supply means;
speed control means ( 126 ) for setting the speed of the electric drive means ( 54 );
a microprocessor ( 124 ) for generating various melody tones when the car is operating and for outputting a control signal for driving the electric drive means ( 54 );
Control means ( 130 ) for driving the electrical drive means ( 54 ) controlled by the microprocessor ( 124 ); and
a fully discharged detector for detecting a completely discharged state of the energy supply means ( 108 ). 10. Electric motor vehicle according to claim 9, characterized in that the control means ( 130 ) comprise:
a resistance through which a high current flows when the electrical drive means ( 54 ) are overloaded,
and a switching transistor which is turned on in accordance with the increased current to the opponent, so that the overload of the electrical drive means ( 54 ) is transmitted to the microprocessor ( 124 ).