JP2003053052A - Driving device for traveling toy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly rotate a housing for accommodating a wheel and its driving mechanism, to make the toy travel on a thick carpet, etc., and to make the whole device compact. SOLUTION: A housing 8 is provided rotatably in a horizontal direction under a gear box 3 in the state of putting an output shaft 6 through a center. A ring-formed gear 10 is provided over the housing 8 and a wheel 11 is pivotally supported inside. The rotating force of the output shaft 6 is transmitted to the wheel 11 through flat gears 18, 19, a rotary shaft 17, etc. A rack 20 is engaged with the ring-formed gear 10 provided at the housing 8, and the rack 20 is biased all the way to be pulled to the rear side of a traveling toy main body 23 with tightened coil spring 22.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a traveling toy. 2. Description of the Related Art In a so-called mystery traveling toy in which the traveling direction changes automatically when the vehicle collides with an obstacle during traveling, a driving device shown in FIG. 4 has been conventionally used. The driving device 100 includes a driving motor 101
A gear box 102 for fixing the drive motor 101 to one end side, reducing the rotational force of the drive motor 101 and transmitting the torque to an output shaft (not shown), and a lower portion of the gear box 102 on the output shaft side. A pair of wheels 10 fixed to an attached housing 103 and an axle (not shown) to which the rotational force of the output shaft attached to the housing 103 is transmitted.
4, 105. The pair of wheels 10
4 and 105, one wheel 104 has a slightly larger diameter than the other wheel 105, and an elastic body 106 such as rubber is attached to the peripheral surface of the one wheel 104 for stable running. The driving device 100 is configured such that when a traveling toy body (not shown) collides with an obstacle while traveling, the housing 103 rotates in the horizontal direction. That is, when the traveling toy main body stops moving,
4 and 105, the rotation of which is suppressed by frictional resistance with the floor or the ground.
4 and 105 is changed to a torque for rotating the housing 103 in the horizontal direction.
Rotates. This changes the direction of the running toy body. [0005] The above-mentioned conventional driving device 1
00 is a configuration using two wheels, and these two wheels are used.
The wheels 104 and 105 are provided at both ends of the axle with the housing 103 interposed therebetween. That is, since the housing 103 is provided so as to sandwich the center of rotation thereof and does not change its direction with respect to the rotation direction, there is a problem that the housing 103 does not rotate smoothly when rotating. There is also a problem that the entire device becomes large.
In addition, since the wheels 104 and 105 are small, there is also a problem that, for example, a carpet having a long bristle or the like cannot travel. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a single wheel at the center of rotation of a housing so that rotation of the housing can be performed smoothly and the size of wheels is increased. By doing so, it is possible to provide a driving device for a traveling toy that can smoothly travel on a carpet or the like having a long hair. SUMMARY OF THE INVENTION In order to solve the above problems, the gist of the present invention is to provide an output shaft for transmitting the rotational force of a drive motor to a gear box provided on a traveling toy body. A housing is provided in the lower part of the gear box so that the output shaft is inserted through the center and is rotatable in the horizontal direction.
An annular gear is provided at the top of the housing, and a wheel is rotatably supported inside the housing, and a mechanism for transmitting the rotational force of the output shaft to the wheels is configured. And a rack that meshes with the gears of the traveling toy body is arranged to move along the axis of the traveling toy body in the traveling direction, and the rack is constantly urged rearward of the traveling toy body by a contraction coil spring. Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a traveling toy implementing a driving device according to the present invention, FIG. 2 is a partially cutaway enlarged perspective view of the traveling toy shown in FIG. 1, and FIG. 3 is an exploded perspective view of the driving device according to the present invention. is there. In the figure, reference numeral 23 denotes a running toy main body, which in the present embodiment has a duck shape. Reference numeral 24 denotes wheels on the rear side of the traveling toy body 23. In the figure, reference numeral 1 denotes a driving device, and 2 denotes a driving motor. Reference numeral 3 denotes a gear box in which the drive motor 2 is fixed to the lower rear, and reference numeral 4 denotes a gear box lid. The gear box 3 is provided with a fitting hole 5 for a guide pin of the rack 20 along the moving direction of the rack 20 described later. Reference numeral 6 denotes an output shaft provided in front of the lower end of the gear box 3. The rotational force of the rotary shaft 2A of the drive motor 2 is transmitted to the output shaft 6 via a reduction gear group 7 in the gear box 3. It is transmitted at a reduced speed. Reference numeral 8 denotes a housing, which is provided at a lower portion of the gear box 3 so as to be rotatable in the horizontal direction with the output shaft 6 inserted through a center portion. Further, the housing 8 has a cup-shaped main body portion 8A provided with a projection 9 for a wheel 11 at the bottom.
And a lid portion 8B which is provided with an annular gear 10 on the upper surface and which is fitted into and integrated with the upper opening of the main body portion 8A. Reference numeral 11 denotes wheels. One wheel 11 having a diameter larger than that of the conventional wheel 11 is used so that a carpet having a long bristle can travel reliably. An elastic body 1 made of rubber or the like is provided on the peripheral surface of the wheel 11 so that stable running can be obtained.
2 is installed. For this reason, the present driving device can travel comfortably in any place regardless of the conditions of the traveling place. Reference numeral 13 denotes an axle of the wheel 11, which is rotatably supported by the housing 8. 14 is the wheel 11
Is an annular gear provided on one side surface so as to surround the axle 13. Reference numeral 15 denotes a spur gear that meshes with the annular gear 14 and is fixed to a lower end of a rotating shaft 17 that is disposed vertically. A spur gear 19 meshing with a spur gear 18 fixed to the end of the output shaft 6 is fixed to the upper end of the rotating shaft 17. Reference numeral 20 denotes a rack which meshes with the annular gear 10 provided on the cover 8B of the housing 8. The rack 20 is provided so as to move along the axis of the traveling toy body 23, that is, along the axis in the same direction as the straight traveling direction in the normal traveling state of the traveling toy body 23.
The rack 20 has guide pins 21 and 21 erected near the ends on both sides in the longitudinal direction, respectively. Reference numeral 22 denotes a contraction coil spring which urges the rack 20 so as to be constantly pulled back to the rear side of the traveling toy main body 23. Therefore, the contraction coil spring 2
2 is an engaging piece 20A at the tip of the rack 20.
And the rear end of the gear box 3 is hooked on the engagement piece 3A at the rear end. Next, the operation of the present embodiment will be described. Turn on the switch (not shown) and drive motor 2
Activate The rotational driving force of the drive motor 2 is transmitted to the output shaft 6, and the rotational force is transmitted to the wheels 11 via the spur gears 18 and 19, the rotation shaft 17, the spur gear 15, and the ring gear 14. This allows the traveling toy body 2
3 runs. If the vehicle collides with any obstacle while traveling straight, the traveling toy body 23 changes its direction. More specifically, when the traveling toy main body 23 collides with an obstacle and its movement is stopped, the wheels 11 continue to rotate. However, wheel 11
Is suppressed by frictional resistance with a floor or the like as a running surface. For this reason, the rotation torque of the drive motor 2 to the wheels 11 is changed to a force for rotating the housing 8 in the horizontal direction, and the housing 8 rotates in the traveling right side, that is, in the direction of the arrow R. As a result, the direction of the wheels 11 also changes, and the direction in which the traveling toy body 23 travels changes. Since the center position of the wheel 11 when rotating in the horizontal direction coincides with the center of the housing 8, the rotation of the wheel 11 does not resist the rotation of the housing 8, and the housing 8 is smooth. Will be able to rotate. Further, as the housing 8 rotates, the spur gear 10 attached to the lid 8B also rotates in the same direction, so that the rack 20 moves forward. Accordingly, the contraction coil spring 22 is in an expanded state. Then, the direction of the wheels 11 changes and the running toy body 23
Is away from the obstacle, the resistance of the wheel 11 is eliminated, and at the same time, the contraction coil spring 22 contracts and the rack 20
Rotates the annular gear 10 to forcibly rotate the housing 8 to its original position. Then, the wheels 11 rotate again, and the traveling toy main body 23 moves forward. As described above, when the wheel 11 changes direction once and returns to the original position, the diameter of the wheel 11 is larger than that of the conventional one, so that the frictional resistance with the floor or the like becomes large and it is difficult to return to the original position. The rack 20 is pulled back by the elastic force of the contraction coil spring 22 and the housing 8 is forcibly rotated to the original position, so that the above-mentioned frictional resistance can be compensated and smooth rotation can be performed. Since the present invention has the above-described structure and operation, a reliable and favorable running condition can be obtained even on a running surface such as a carpet with long bristle which is difficult to run conventionally. Moreover, the overall configuration can be made more compact than before. Furthermore, when the housing that houses the wheels and its drive mechanism changes direction once and then returns to the original direction, it can be done quickly and smoothly, so that the movement of the running toy becomes sharp and the interest of play doubles It has the effect of doing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a traveling toy implementing a driving device according to the present invention. FIG. 2 is a partially cut-away enlarged perspective view of the traveling toy shown in FIG. FIG. 3 is an exploded perspective view of a driving device according to the present invention. FIG. 4 is a perspective view of a conventional driving device. [Description of Signs] 1 Drive device 2 Drive motor 3 Gear box 5 Fitting hole for rack guide pin 6 Output shaft 7 Reduction gear group 8 Housing 10 Annular gear 11 Wheel 13 Axle 14 Annular gear 15 Spur gear 17 Rotary shaft 18, 19 Spur gear 20 Rack 21 Guide pin 22 Contraction coil spring

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Claims (1)

Claims 1. An output shaft of a drive motor is provided on a gear box provided on a traveling toy body, and a housing is provided at a lower portion of the gear box so as to be rotatable in a horizontal direction, and an upper portion of the housing is provided at an upper portion of the housing. Is provided with an annular gear, and internally provided with a mechanism for rotatably supporting one wheel and transmitting a rotational force of the output shaft to the wheel, and a rack meshing with the annular gear provided on the housing. A driving device for a traveling toy, which is disposed so as to move along the axis of the traveling toy body, and constantly biases the rack to the rear of the traveling toy body by a contraction coil spring.