JP4170329B2 - Electric riding toys for children - Google Patents

Description

  The present invention relates to an extremely small and simple electric riding toy for a child on which a child or an infant rides while driving by himself / herself.

  2. Description of the Related Art An electric riding toy for children is known in which a child or an infant can ride and operate at low speed while maneuvering by himself / herself. For example, it is used to play children in parks, open spaces, vacant lots, etc., and is capable of self-propelled at low speed by a rechargeable battery and an electric motor.

Utility model registration No. 3106309 Utility model registration No. 3087339

  Patent Documents 1 and 2 show an automobile type vehicle body having a seat as the seating seat, a rear wheel as a driving wheel, and a front wheel held in the vicinity of the center of the front of the vehicle body in a steerable manner. Here, the front wheels can rotate freely, and the two front wheels are held close to each other in the vehicle body width direction and held on a common axle. In addition, decorative (dummy) front wheels slightly attached to the ground are attached to the left and right side surfaces of the front portion of the vehicle body.

  The conventional one is provided with a pair of left and right footrests projecting sideways from the side of the vehicle body between the front and rear wheels for decoration.

  In the conventional one, since the footrest protrudes laterally from the vehicle body, the outer peripheral shape of the vehicle body has complicated irregularities in plan view. Since this type of riding toy is often used in a narrow place, if there are many irregularities on the outer periphery of the vehicle body, it is easy to hit an obstacle, and there is a problem that it is not only easy to damage the obstacle and the vehicle body but also difficult to run.

  In addition, since the place of the footrest is limited between the front and rear wheels for decoration, the seating seat should be extended to the rear from the footrest to ensure a good seating posture for the child. Is required. For this reason, there is also a problem that the vehicle body becomes large.

  Furthermore, since the child who got on sits straddling a seat, it is necessary to open the knees of both legs to the left and right. For this reason, there is a problem in that it is difficult to balance left and right, the running posture tends to be unstable, and it is difficult for young children and infants to ride in particular.

  The present invention has been made in view of such circumstances, and even when hitting an obstacle by smoothing the outer periphery of the vehicle body, it is difficult to damage the obstacle or the vehicle body, and stable even for young children without increasing the size of the vehicle body It is an object of the present invention to provide an electric riding toy for children that can be easily and stably driven in a sitting posture.

According to the present invention, an object of the present invention is to provide a children's electric riding toy equipped with one steering front wheel and a pair of left and right rear wheels, covering the front wheels and the rear wheels, with the upper surface projecting upward and the outer periphery being smooth in plan view. A vehicle body having a shape, a front wheel holding portion that holds the front wheel at the lower end of a cylindrical portion that is vertically pivoted through the front portion of the vehicle body, and a steering handle mounting portion at the upper end. a power unit with a built-in driving device for rotating the front wheel by the electric motor to co as having, respectively, a steering handle attached to the steering handle attachment part, the upper surface protrudes upwardly from the upper rear surface of the vehicle body seating Achieved by a children's electric riding toy characterized by comprising: a seat seat as a surface; and a pair of left and right footrests formed on the left and right sides of the power unit and with the upper surface of the vehicle body depressed downward Be done

Periphery a convex upper surface of the vehicle body upward and viewed smooth curved shape, the cylindrical portion of the power unit is passed through the front body in the vertical direction to allow lateral rotation, it holds the front wheel at the lower end of the cylindrical portion upper end Steering handle mounting part is provided on the left and right sides of the power unit, and the upper surface of the vehicle body is depressed downward, so that the footrest does not protrude outward from the outer periphery of the vehicle body. A smooth curved surface can be left. For this reason, even if an obstacle hits the outer periphery of the vehicle body, the impact can be mitigated by sliding on the curved surface of the outer periphery of the vehicle body, making it difficult to damage the obstacles and the vehicle body.

  Further, since the position of the footrest is not restricted by the front and rear wheels, the degree of freedom in arrangement is increased. For this reason, by placing the footrest on the side of the power unit (and hence near the front of the vehicle) while protruding the seating seat upward from the rear of the vehicle, the distance between the left and right footrests can be reduced, and both feet can be enlarged. You can sit in an easy posture without opening. That is, even if the vehicle body is downsized, it is possible to get in a comfortable posture without greatly restricting the riding posture. In particular, the seat does not need to be straddled and it is not necessary to open both feet widely, so that the right and left balance can be easily achieved and the riding posture is stabilized. Further, since the vehicle body has a substantially spherical shape that protrudes upward, it is suitable for increasing the vehicle body rigidity and can be reduced in weight.

Furthermore, since the driving device for the front wheels is provided in the power unit, the rear wheels can be reduced in diameter as non-driving wheels. Therefore, the left and right rear wheels can be arranged close to the outer periphery of the vehicle body, and the distance (tread) between the left and right rear wheels can be increased to improve the running stability of the vehicle body. On the other hand, since the front wheel is a driving wheel, it is desirable to increase the diameter to increase the contact area and prevent idling (slip). However, according to the present invention, the front wheel is disposed on the front-rear center line passing through the vehicle body center in the front-rear direction. Even if the diameter is increased, it is difficult to interfere with the upper surface of the vehicle body, and it is easy to increase the diameter.

  It is sufficient that the number of front wheels is substantially one, and it is sufficient that two or more wheels are arranged close to each other on the same axis as long as they can be regarded as substantially one. It is preferable that the vehicle body has a substantially spherical shape that protrudes upward, and the outer periphery thereof has a substantially circular shape in plan view.

  If the seating seat is detachable from the upper side of the vehicle body and a battery is accommodated under the seating seat, the center of gravity of the vehicle body can be lowered using the load of the battery. If the upper surface of the seating seat is depressed so that it smoothly descends from the rear edge and the left and right side edges toward the center, it becomes close to the so-called bucket seat shape, and the distance between the left and right footrests can be narrowed. Can be seated without widening left and right. For this reason, it is suitable for stabilizing the position of the waist when seated to stabilize the riding posture.

  By providing a pair of left and right tilt angle regulating members on the lower surface of the vehicle body on the left and right outer sides of the front wheels and in the vicinity of the outer periphery of the lower surface of the vehicle body, it is possible to prevent the front portion of the vehicle body from greatly falling to the left and right. 5). In other words, since it is normally grounded at three points with one front wheel and two rear wheels, there is an inconvenience that it is easy to tilt left and right around the center of the front wheel, but the tilt angle at this time falls and the angle regulating member contacts the road surface It is limited by letting it. In this case, the tilt angle regulating member is preferably arranged in front of a straight line in the vehicle body width direction passing through the center of the front wheel.

  The tilt angle regulating member preferably has a smooth curved surface that protrudes downward. It is because it can pass without generating a big impact with respect to the unevenness of the road surface. The most suitable surface is made of a material with low surface frictional resistance. It is desirable to improve the running stability of the vehicle body by disposing the tilt angle restricting member and the left and right rear wheels as close to the outer periphery of the vehicle body as possible (claim 8).

  In addition, it is desirable to install an auxiliary wheel for preventing the vehicle from falling backward in the vicinity of the center rear edge of the lower surface of the vehicle body so that the front of the vehicle body rises and the front wheel comes into contact with the road surface when the vehicle floats above a certain level. . This is because, if this auxiliary wheel is provided, the vehicle body posture can be maintained while the rear wheel and the auxiliary wheel are kept in contact with each other even if the front part of the vehicle body is lifted. If a pair of left and right auxiliary wheels are provided apart in the vehicle body width direction, the vehicle body will not be unstable in the left-right direction and will be stable even if the front wheel is lifted.

  Providing a forward tilt restricting member that restricts the forward tilt of the vehicle body in front of the vehicle body, that is, in front of the front wheels, can prevent the vehicle body from tilting forward greatly when a child lifts his / her waist from the seat.

The drive device may be provided with a torque limiter that keeps the driving force (torque) of the motor transmitted to the front wheels below a certain level (Claim 10 ). For example, when the vehicle body hits an obstacle, this torque limiter acts to prevent the motor load from becoming excessive, protect the motor, etc., and when this torque limiter makes a clicking sound during operation, The child inside can easily notice that the vehicle is hitting an obstacle.

If one of the footrests is provided with a manipulator (foot-operated manipulator) that operates with a foot for motor control, it can be operated without releasing the hand from the steering handle. 11 ). An impact sensor may be attached to the vehicle body, and a sounding unit (chime unit) that generates a sound (for example, a chime sound or a melody sound) when the sensor is subjected to an impact may be attached to the vehicle body. 12 ).

The impact sensor may be installed in the sound generation unit. In this case, since the sound generation unit is configured as an independent unit including the battery and can be attached to and detached from the vehicle body, assembly is facilitated. The impact sensor may be of a contact sensor of a tape-like shape wound on the body periphery (strip) (claim 13). In this case, the tape-like contact sensor is preferably embedded in a cushioning material attached to the outer periphery of the vehicle body.

  1 is a perspective view showing the appearance of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, FIG. 4 is a cross-sectional view taken along line BB, and FIG. It is a FF sectional view similarly.

  6 is a bottom view of this embodiment, FIG. 7 is a sectional view taken along the line CC in FIG. 6, FIG. 8 is a sectional view taken along the line DD, and FIG. 9 is a sectional view taken along the line EE.

  FIG. 10 is a front view showing the drive device extracted, FIG. 11 is a longitudinal sectional view thereof, FIG. 12 is a sectional view taken along line GG in FIG. 10, FIG. 13 is a plan view of the power unit, and FIG. .

Body structure

  First, the arrangement configuration of the entire vehicle body will be described. 1-9, the code | symbol 10 is a synthetic resin vehicle body. The vehicle body 10 is formed in a substantially spherical shape whose upper surface is convex upward, and is substantially circular in plan view (FIGS. 2 and 6). As shown in FIGS. 3 and 5, the vehicle body 10 has a shape similar to an upper half shape of an ellipse having a long axis in the front-rear direction when viewed from the side. The front view shape of the vehicle body 10 is substantially hemispherical as is apparent from FIGS. After all, the upper surface of the vehicle body 10 has a substantially turtle shell shape.

  Reference numeral 12 denotes a seat. The seat 12 projects upward from the rear portion of the upper surface of the vehicle body 10. The upper surface 12a of the seating seat 12 is recessed so as to smoothly descend from the rear edge 12b and the left and right side edges 12c, 12d toward the vicinity of the center of the upper surface 12a. Therefore, the upper surface 12a serving as a seating surface is deepest in the vicinity of the center, and can firmly hold the waist of the child seated here.

  As shown in FIGS. 3, 7, and 8, a box-like support portion 12 e that opens downward projects from the lower portion of the seating seat 12, and the support portion 12 e is formed on the vehicle body 10 side and is fixed upward to the seat. It can be inserted into the opening 14 from above. A battery storage box 16 is formed integrally with the vehicle body 10 on the bottom surface of the opening 14 of the vehicle body 10, and the upper surface of the battery storage box 16 is open to the bottom surface of the opening 14. The battery storage box 16 stores a rechargeable secondary battery 18 such as a lead battery, a nickel cadmium battery, a nickel metal hydride battery, or the like.

  A charging adapter 20 is housed in the support portion 12e of the seating seat 12 so as to be detachable from below. The adapter 20 is taken out when the battery 18 is charged and connected to an outlet of a commercial power source. The output end of the adapter 20 is connected to a connection terminal 22 (attached to the rear surface of the battery storage box 16 from the lower surface of the vehicle body 10. Connected to FIGS.

  Lock members 24 and 24 (FIG. 8) that are urged in a direction to enter the opening 14 horizontally through the left and right side surfaces of the opening 14 are attached to the vehicle body 10 so as to be able to move forward and backward. The lock members 24 and 24 are integrally formed with lock levers 26 and 26 (FIGS. 6 and 8) protruding downward, and by pushing the levers 26 and 26 outward (in a direction away from each other), the lock members 24 and 24 are opened. 24 can be withdrawn from the opening 14. In this state, after the support portion 12e of the seating seat 12 is inserted into the opening 14, the lock members 24, 24 are returned into the opening 14, and the lock members 24, 24 are engaged with the support 12e. The seating seat 12 can be fixed to the rear part of the vehicle body 10.

  A plurality of vertically long ribs 27 connecting the lower surface of the rear edge 12b and the upper rear surface of the support portion 12e are integrally formed on the lower surface of the seating sheet 12. These ribs 27 increase the rigidity of the rear portion of the seating seat 12 and prevent the clothes and the like from being caught in the gap between the opening 14 and the support portion 12e.

  A pair of left and right footrests 28 and 28 are formed on the left and right sides of the vehicle body 10 in a shape in which the upper surface of the vehicle body 10 is depressed downward. These footrests 28 and 28 are located on the left and right sides of the power unit 30 described later, and are open in the left-right direction and the front. Guard plates 28a and 28a are fixed to the front edges of the footrests 28 and 28 in order to prevent an obstacle from hitting the foot and to prevent the foot from protruding forward from the vehicle body 10 (FIGS. 1 and 2). 5).

Power unit

  A power unit 30 passes through the front portion of the vehicle body 10 vertically from below and is held so as to be rotatable left and right. Inside the power unit 30, a drive device 36 including an electric motor 32, a speed reducer 34, and the like is accommodated, and one front wheel 38 held at the lower portion of the power unit 30 is rotationally driven.

  The power unit 30 includes a cylindrical portion 40, a substantially cylindrical front wheel holding portion 42 that is attached to the lower end of the cylindrical portion 40 and has a larger diameter than the cylindrical portion 40, and a small-diameter cylindrical operation provided at the upper end of the cylindrical portion 40. And a directional handle mounting portion 44. A stepped portion 46 (FIG. 13) is formed between the cylindrical portion 40 and the front wheel holding portion 42 so as to project annularly in the outer diameter direction of the cylindrical portion 40.

  Four resin rollers 48 (FIG. 13) are mounted on the step 46 so as to be rotatable about the radial direction. An annular bearing portion 52 (FIGS. 3 and 4) is attached to the lower edge of the circular power unit mounting hole 50 provided on the vehicle body 10 side. The power unit 30 is rotatably held on the vehicle body 10 by rolling the rollers 48 to the lower surface of the bearing portion 52.

  An annular groove 54 (FIGS. 3 and 4) is formed near the lower portion of the cylindrical portion 40, and a lock member 56 (FIG. 6) provided on the vehicle body 10 side (power unit mounting hole 50 side) is engaged therewith. This prevents the power unit 30 from falling downward. An upper portion of the cylindrical portion 40 of the power unit 30 protrudes from the vehicle body 10, and a circular steering handle 58 is detachably attached to the handle attachment portion 44.

  That is, the handle mounting portion 44 is loaded with lock pins 60, 60 (FIG. 4) biased so as to protrude outward in the radial direction, and the lower portion of the steering handle 58 faces the handle mounting portion 44 downward from above. The lock pins 60, 60 are engaged with the steering handle 58 when they are fitted to the steering handle 58, thereby restricting the steering handle 58 from coming off. When the steering handle 58 is pulled out, the lock pins 60, 60 may be pushed inward in the radial direction to release the lock.

  The front wheel holding portion 42 has a shape in which both left and right edges of a vertically oriented cylinder are vertically cut when viewed from the bottom (FIG. 6), and the left and right edges serve as axle support walls 62 and 62 of the front wheel 38. That is, both ends of the axle 64 of the front wheel 38 are rotatably held by the axle support walls 62 and 62 by bearings.

  As shown in FIGS. 4, 10, 11, and 12, the speed reducer 34 of the drive device 36 is mounted in the front wheel holding portion 42, and the electric motor 32 is located above the front wheel 38. The rotation of the output shaft of the motor 32 is decelerated by the reduction gear group of the reduction gear 34 and transmitted to the axle 64. The front wheel 38 is splined to the axle 64 and rotates integrally with the axle 64.

  A torque limiter 66 that restricts the magnitude of the motor driving force applied to the axle 64 to a certain value or less is attached to one gear in the reduction gear group (FIG. 11). The output shaft of the motor 32 also protrudes on the opposite side of the speed reducer 34, and a blower fan 68 is attached thereto. Accordingly, the rotation of the motor 32 causes the fan 68 to introduce outside air into the power unit 30 from the slit-like small hole 70 (see FIG. 3) provided in the cylindrical portion 40 of the power unit 30 to cool the driving device 36.

  On the lower edge of the axle support walls 62, 62 of the front wheel holding portion 42, shoes 72, 72 are fixed to the left and right sides of the front wheel 38 and extend to a position higher than the lower edge of the front wheel 38 by a predetermined dimension. . These shoes 72, 72 are grounded when the front wheel 38 falls into a groove on the road surface, and prevent the front wheel 38 from sinking deeply into the groove, thereby improving traveling performance on a rough road.

Wheel arrangement

  As is clear from FIGS. 1, 2, 3, 5, 6 and the like, the power unit 30 is located in front of the center of the vehicle body 10. Reference numerals 80 and 80 denote a pair of left and right rear wheels that idle, and as shown in FIG. 6, the ground contact points of the front wheel 38 and the rear wheels 80 and 80 form a substantially equilateral triangle in a bottom view. Here, the rear wheels 80, 80 are sufficiently smaller in diameter than the front wheels 38, and are arranged to be as close as possible to the edge of the vehicle body 10.

  Reference numerals 82 and 82 denote a pair of left and right tilt angle restricting members, which are disposed on the left and right outer sides of the front wheel 38 and close to the outer peripheral edge of the vehicle body 10. These tilt angle restricting members 82 and 82 are separated from the road surface A by a predetermined dimension with the front wheel 38 and the rear wheels 80 and 80 being grounded (FIGS. 3, 5, and 9). The tilt angle restricting members 82 and 82 prevent one member 82 from coming into contact with the road surface when the vehicle body 10 is inclined forward, and further preventing the vehicle body 10 from being further inclined.

  Here, the tilt angle regulating members 82 and 82 are positioned in front of a straight line B (FIGS. 2 and 6) in the vehicle width direction passing through the center of the front wheel 38. This is because the vehicle body 10 can be efficiently prevented from falling obliquely forward. The tilt angle regulating members 82 and 82 are formed so that the lower surfaces thereof are smooth curved surfaces convex downward so that they can easily get over the unevenness of the road surface.

  Near the center rear wheel of the vehicle body 10, auxiliary wheels 84 for preventing the vehicle from falling backward are attached at a certain distance from the ground plane A. The auxiliary wheel 84 prevents the front wheel 38 from being lifted from the road surface more than a certain amount, for example, when a child seated during traveling moves backward in the center of gravity. By providing a pair of left and right auxiliary wheels 84 coupled to each other so as to rotate integrally, the vehicle body 10 is less likely to swing left and right when the front portion of the vehicle body 10 is lifted, and the stability of the vehicle body 10 is improved. To do.

  A forward tilt restricting member 86 that restricts the forward tilt of the vehicle body 10 is attached to the center front end of the vehicle body 10, that is, in front of the front wheel 38. The member 86 is made of a resin having a smooth surface and a small frictional resistance like the tilt angle regulating member 82.

Control circuit

  Next, the control circuit will be described with reference to FIG. The control unit 90 incorporating this control circuit is attached to the central lower surface (FIG. 3) of the vehicle body 10. That is, it is fixed from the lower surface of the vehicle body 10 near the lower portion of the front end of the seating seat 12. A main switch 92 is attached adjacent to the front of the control unit 90. That is, the main switch 92 can be operated from between the power unit 30 and the seat 12 (FIGS. 3 and 5). A foot switch 94, which is a foot-operated operator that is turned on and off with a foot, is attached to the right footrest 28.

  These switches 92 and 94 are connected to the control unit 90 together with the motor 32 and the battery 18. In FIGS. 3 and 6, reference numerals 96 and 98 denote cord guides for passing a wiring cord for connecting the battery 18 and the foot switch 94 to the control unit 90. The motor 32 is a permanent magnet type DC motor. The controller 90 and the motor 32 are electrically connected via a slip ring (not shown) provided on the outer periphery of the cylindrical portion 40 of the power unit 30.

  In this control circuit, as shown in FIG. 14, the soft start circuit 100 gradually increases the motor current when the switches 92 and 94 are turned on, and the relay 102 is turned on after a certain time and the motor 32 is directly connected to the battery 18.

  The soft start circuit 100 has an operational amplifier (operational amplifier) 104, and a divided voltage V6 obtained by dividing the battery voltage by a resistor R6 and a capacitor C2 is led to a negative input terminal of the operational amplifier 104 via a diode D2. Yes. Therefore, the voltage V6 at the negative input terminal gradually increases with time due to the charging of the capacitor 108. The charging voltage V7 of the capacitor C3 is led to the + input terminal of the operational amplifier 104. A divided voltage V7 obtained by dividing the drive voltage (armature counter electromotive voltage) of the motor 32 by the resistors R8 and R7 is led to the capacitor C3. Therefore, this voltage V7 increases as the motor rotation speed increases.

  When at least one of the switches 92 and 94 is turned on from the off state, the capacitor C2 starts to be charged, and the voltage V6 gradually increases from zero. On the other hand, before the motor current starts to flow, the voltage V7 of the capacitor C3 is also zero.

  The operational amplifier 104 outputs a negative voltage V1 to the output terminal when V6> V7. This voltage V1 turns on the driving side transistor Q1 of the Darlington-connected PNP transistors Q1 and Q2, and further turns on the output side transistor Q2. The output side transistor Q2 is interposed between the battery 18 and the motor 32, and a motor current flows when the transistor Q2 is turned on. For this reason, the capacitor C3 is charged and V7 rises.

  When V6 ≦ V7, the output terminal voltage V1 of the operational amplifier 104 changes to a positive voltage, and the transistors Q1 and Q2 are turned off. For this reason, the motor current is cut off. Then, the capacitor C3 is discharged through the resistor R7, and V7 drops. When V6> V7 again, the motor current flows. Thus, the motor current is eventually turned on / off. For this reason, the motor 32 is activated gently.

  On the other hand, since the negative input voltage V6 of the operational amplifier 104 gradually increases as the capacitor C2 is charged, the time ratio V6> V7, that is, the time ratio (duty ratio) at which the motor current is turned on / off is As time elapses, the output of the motor 32 increases.

  The charging voltage V6 of the capacitor C2 is led to the + input terminal of the operational amplifier 106 for switching the relay 102. A divided voltage V4 obtained by dividing the battery voltage by the resistors R1 and R2 is led to the negative input terminal of the operational amplifier 106. While the voltage V4 is constant, the voltage V6 increases with time as described above. The output terminal voltage V2 of the operational amplifier 106 is a positive voltage when V4> V6 immediately after the start of the start, and becomes a negative voltage when V4 ≦ V6 after a predetermined time has elapsed. When the output voltage V2 becomes a negative voltage, the NPN transistor Q3 connected in series to the drive coil 102a of the relay 102 is turned on, and the relay 102 is excited. Therefore, the relay 102 short-circuits the transistor Q2 and connects the motor 32 and the battery 18 in series.

  When the switches 92 and 94 are turned on in this manner, the motor current is controlled to be turned on / off, and the duty ratio increases with time and the motor current increases. When the charging voltage V6 of the capacitor C2 becomes equal to or higher than a certain level (V6 ≧ V4), the relay 102 is turned on and the motor 32 is directly connected to the battery 18.

  In the circuit diagram of FIG. 14, the capacitor C1 and the diode D1 are for noise absorption and protect the circuit. In this embodiment, other electronic circuits are also provided. First, a horn unit 108 is attached to the center of the steering handle 58. The horn unit 108 generates a timbre for playing a melody such as a chime by pressing a push switch on the upper surface. A chime unit 110 as a sound generation unit is embedded in the vehicle body 10 from above in front of the power unit 30. For example, when an impact is applied to the vehicle body, the chime unit 110 generates an interesting tone that changes variously, and causes the light emitting element to emit light. Also, the chime unit 110 is provided with an impact sensor (110A (FIG. 3) for detecting an impact when the vehicle body 10 hits an obstacle such as a wall. The sensor for detecting the impact may be provided on the outer peripheral edge of the vehicle body 10. In this case, the sensor includes a tape-shaped contact sensor 110B (switch) along the outer peripheral edge of the vehicle body. It may be attached in the attached cushioning material 112. (FIG. 3) Depending on the place where the impact is applied and the magnitude of the impact, the tone and melody of the generated sound may be changed, or the magnitude of the sound may be changed.

Traveling motion

  A child who rides in this car sits on the seat 12, places both feet on the footrests 28 and 28, and turns on the main switch 92. When the foot switch 94 is depressed with the right foot, a current starts to flow through the motor 32, and the motor current gradually increases from 0 by the action of the soft start circuit 100. For this reason, the vehicle body 10 starts quietly without causing an impact. If the right foot is lifted from the foot switch 94 and the foot switch 94 is turned off, the motor current is cut off. Therefore, the motor 32 stops.

  When the vehicle body 10 hits a wall or the like during traveling, the impact is detected and the chime unit 110 generates sound or light. At this time, when the travel of the vehicle body 10 is forcibly restricted by an obstacle, the torque limiter 66 of the drive device 36 generates a ticking sound, which can call attention. At this time, the child can cause the vehicle body 10 to escape from the obstacle by turning the steering handle 58 to change the forward direction. Since the power unit 30 is connected to the control unit 90 by a slip ring, it can rotate 360 °. For this reason, it is possible to change the direction of the vehicle body 10 left and right and rearward by simply rotating the steering handle 58 without reversing the motor 32, and the electric circuit can be simplified.

  When the vehicle body 10 is tilted left and right during traveling, the tilt angle regulating member 82 on the tilted side comes into contact with the road surface, and the vehicle body 10 is prevented from falling excessively. Further, since the lower surface of the tilt angle regulating member 82 is smooth and slippery, it can slide smoothly on the road surface. For this reason, it is possible to continue running stably. Further, when the front portion of the vehicle body 10 is lifted, the auxiliary wheel 84 provided at the rear portion of the vehicle body is grounded to prevent excessive lifting. When the rear portion of the vehicle body 10 is lifted, the forward tilt restricting member 86 provided at the front portion of the vehicle body is grounded to prevent excessive lift.

The perspective view which shows the external appearance of one Example of this invention Same top view AA line sectional view in FIG. BB line sectional view Similarly FF sectional view Bottom view of this example CC sectional view in FIG. Similarly DD line cross section EE line cross-sectional view Front view showing the drive unit The longitudinal section GG sectional view in FIG. Top view of power unit Electrical diagram

Explanation of symbols

10 Car body 12 Seating seat 12a Upper surface (sitting surface)
12b Rear edge 12c, 12d Side edge 18 Battery 28 Footrest 30 Power unit 32 Electric motor 34 Deceleration device 36 Drive device 38 Driving front wheel 40 Cylindrical portion 42 Front wheel holding portion 44 Steering handle mounting portion 58 Steering handle 66 Torque limiter 80 Rear wheel 82 Tilt angle regulating member 84 Auxiliary wheel 86 Forward tilt regulating member 90 Control unit 92 Main switch 94 Foot switch (foot-operated operator)
100 soft start circuit 110 chime unit (sound generation unit)
110A Impact sensor 110B Contact sensor 112 Buffer material

Claims (13)

In an electric riding toy for children comprising one steering front wheel and a pair of left and right rear wheels,
A vehicle body that covers the front wheels and the rear wheels, and whose upper surface is convex upward and whose outer periphery is a smooth curved shape in plan view;
Before the front wheel holding part for holding the front wheel at the lower end of the cylindrical portion pivotally held to the right and left through the front portion of the vehicle body in the vertical direction also in co if each having a steering handle attached portion at its upper end A power unit having a built-in driving device for rotating the wheel by an electric motor ;
A steering handle attached to the steering handle attachment part,
A seat that protrudes upward from the rear upper surface of the vehicle body and has the upper surface as a seating surface;
A pair of left and right footrests formed on the left and right sides of the power unit, the upper surface of the vehicle body being depressed downward;
An electric riding toy for children, comprising:   The children's electric riding toy according to claim 1, wherein the vehicle body has a substantially spherical shape with a convex upper surface and an outer periphery of the vehicle body is substantially circular in plan view.   The electric riding toy for children according to claim 1, wherein the seating seat is detachable upward, and a battery is loaded in the vehicle body below the seating seat.   The electric riding toy for children according to claim 1, wherein the upper surface of the seating seat is depressed so as to smoothly descend from the rear edge and the left and right side edges toward the vicinity of the center of the upper surface.   The electric riding toy for children according to claim 1, further comprising a pair of left and right tilt angle regulating members that limit the tilt angle in the left and right direction of the vehicle body at a position on the left and right outer sides of the front wheel and close to the outer peripheral edge of the lower surface of the vehicle body.   The electric riding toy for children according to claim 5, wherein the tilt angle regulating member is positioned in front of a straight line passing through the center of the front wheel in the vehicle body width direction.   6. The electric riding toy for children according to claim 5, wherein the falling angle regulating member has a smooth curved surface that protrudes downward.   The electric riding toy for children according to claim 5, wherein the pair of left and right falling angle regulating members and the pair of left and right rear wheels are located near the outer periphery of the substantially circular vehicle body in plan view.   The electric riding for children according to claim 1, wherein auxiliary wheels for preventing the vehicle from toppling backward are attached in the vicinity of the central rear edge of the lower surface of the vehicle body to prevent the vehicle from falling forward when the front of the vehicle body rises and the front wheels rise above the road surface. toy. 2. The electric riding toy for children according to claim 1 , wherein the driving device includes a torque limiter that restricts driving by the electric motor applied to the front wheels to a certain level or less.   The electric riding toy for children according to claim 1, wherein a foot-operated operator for controlling the electric motor is attached to one of the footrests.   The electric riding toy for children according to claim 1, wherein the vehicle body includes an impact sensor that detects an impact, and a sound generation unit that generates a sound when the impact sensor detects an impact applied to the vehicle body. The electric riding toy for children according to claim 12 , wherein the impact sensor is a belt-like contact sensor attached to the outer periphery of the vehicle body.

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