JPH0247997Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a direction changing device for a traveling toy, and more specifically, a device for changing the direction of a traveling toy. This belongs to the field of direction changing devices for traveling toys that can avoid obstacles by reversing either one of them to change the direction of travel.

Conventional technology As a conventional technology belonging to this field, the
There are inventions (devices) disclosed in JP-A-35148 and JP-A-54-36842.

All of these conventional inventions (devices) are transmission mechanisms composed of a plurality of spur gears. operates, the meshing relationship of the gears changes, and one drive wheel rotates in the opposite direction. By rotating the drive wheels in the opposite direction, the traveling toy changes course to avoid obstacles.

Problems to be Solved by the Invention However, when the above-mentioned conventional structure is adopted, there is a problem that the number of parts increases due to the use of protrusions, slots, and cam mechanisms, making the structure complex.

By using a worm wheel and a worm gear in the transmission mechanism, this invention has a simpler structure with fewer parts than conventional ones, and when the traveling toy hits an obstacle, one drive wheel is reversed. The object of this invention is to provide a direction changing device for a traveling toy that rotates to change course and thereby avoid obstacles.

Means for Solving the Problems In order to solve the above problems, the present invention has a pair of left and right drive shafts each having a worm wheel fixed to the inner end side and a drive wheel fixed to the outer end side, and a pair of drive shafts fixed to the worm wheels respectively. A worm gear body that meshes with the worm part, a co-rotation transmission gear and a reverse rotation transmission gear that can connect the gear parts of these worm-gear bodies in a same-rotation and opposite-rotation relationship, and a drive source. a gear that transmits the rotational force of the worm gear to a gear portion on one side of the worm gear body, and the worm gear body on the side to which the rotational force is applied from the drive source is in a direction substantially perpendicular to the one drive shaft. It is located in the center, can be raised and lowered, and is constantly given the power to move upward or downward.
The raised position and lowered position allow the gear to be selectively engaged with the same-direction rotation transmission gear and the opposite-direction rotation transmission gear.

Function With the above configuration, when a traveling toy that is traveling straight hits an obstacle and a load is applied to the drive wheels, one of the worm gear bodies moves in the axial direction. The meshing relationship of the gears changes, causing one of the drive wheels to rotate in the opposite direction, thereby causing the traveling toy to change direction and avoid obstacles.

Embodiment As shown in FIG. 1, a direction changing device for a running toy according to an embodiment of the present invention is comprised of a pair of left and right drive wheels 3 and 4 each fixed to the outer end portion roughly arranged on the same axis. drive shafts 1 and 2, a worm gear body 16 provided in a direction substantially perpendicular to the drive shaft 1, and a plurality of gear groups 6 that mesh with the worm gear body 16 to rotate the drive wheels 4 in forward and reverse directions. As will be detailed later, the worm gear body 16
is moved by the load applied to the drive wheel 3, and the meshing state of the worm gear body 16 and the gear group 6 changes,
As a result, the drive wheels 4 rotate in the opposite direction, and the entire traveling toy (not shown) can change direction to avoid obstacles.

Next, the details of each component will be explained in more detail.

The drive shafts 1, 2 have their respective inner ends mounted on bearing members 8 (Fig. 3) fixed on the frame 7 (Figs. 2 and 3) of the traveling toy, and their intermediate parts mounted on the frame 7. Fixed bearing members 7a, 7a (see Figure 2)
Each is rotatably supported.

Further, worm wheels 9 and 10 are fixed to the inner end sides of the drive shafts 1 and 2, respectively. These worm wheels 9, 10 include worm 16a, 25a portions of worm gear bodies 16, 25 fixed to rotating shafts 15, 23 installed perpendicularly to the frame 7 in a direction substantially orthogonal to the drive shafts 1, 2. are meshing.

The worm/gear bodies 16, 25 are constructed by integrating worms 16a, 25a and gears 16b, 25b, respectively.
The teeth 25a are both formed in a right-handed thread direction.

One worm gear body 16 is connected to the shaft 15.
It is also movable up and down, and a downward moving force (returning force) is constantly applied by a coil spring 18 fitted onto the shaft 15.

This worm gear body 16 has its gear 16b
Through a pinion 14 that is always in mesh with the pinion, a crown gear 13 that is coaxially fixed to the pinion 14, and a drive gear 11 that is meshed with the crown gear 13,
The motor 5 constantly applies a rotational force in the counterclockwise direction when looking down from above.

With the above configuration, the worm gear body 16 is in a lowered position during normal driving, but when the traveling toy (not shown) hits an obstacle, the drive wheel 3 is exposed to a predetermined amount or more. When a load is applied, the worm gear 16a meshing with the worm wheel 9 is urged in an upward direction, and rises against the force of the coil spring 18.

Here, the shaft 12 is rotatably erected on the frame 7, and the motor 5 is connected to a battery B via a switch S.

On the other hand, a co-rotation transmission gear 21 is provided between the worm gear bodies 16-25, which can connect the worm gear bodies 16 and 25 to each other in a co-rotating relationship.
(composed of an odd number of gears) and reverse rotation transmission gears 22, 2 that can be connected in a reverse rotation relationship.
7 (consisting of an even number of gears) are arranged on different routes.

That is, the same direction rotation transmission gear 21 is always meshed with the gear 25b of the worm gear body 25,
When the worm gear body 16 in which the traveling toy (not shown) is normally traveling is in the lowered position, the gear 16b of the worm gear body 16 meshes with the same direction rotation transmission gear 21. At this time, both the worm gear bodies 16 and 25 rotate in the same direction, that is, counterclockwise in FIGS. 1 and 2, and the drive wheels 3 and 4
rotates in the forward direction (in the direction of the solid arrow in FIG. 1).

On the other hand, the reverse rotation transmission gears 22 and 27 are always in mesh with the gear 25b of the worm gear body 25, and when the traveling toy (not shown) hits an obstacle, the load on the drive wheels 3 is greater than a predetermined value. When added,
Since the lifting force applied to the worm gear body 16 by the worm wheel 9 meshing with the worm 16a of the worm gear body 16 increases, the worm gear body 16 rises against the force of the coil spring 18, Accordingly, the gear 16b is disengaged from the same direction rotation transmission gear 21 and is transferred to the opposite direction rotation transmission gear 27.
mesh with. At this time, the worm gear body 2
5 rotates in the opposite direction to the worm gear body 16, that is, clockwise in FIGS. 1 and 2, and one drive wheel 3 rotates in the forward direction (in the direction of the solid arrow shown in FIG. 1).
At the same time, the other drive wheel 4 rotates in the backward direction (the direction shown by the dashed line in FIG. 1).

When the running toy 1 incorporating the direction changing device configured as described above turns on the switch S,
Drive straight ahead. When the vehicle hits an obstacle and a load is applied to the drive wheels 3, the drive wheels 4 rotate in reverse.
Along with this, the running toy (not shown) turns to the right to avoid the obstacle, and when it finishes avoiding the obstacle, the load on the drive wheels 3 due to the obstacle is released. , the running toy returns to running straight again.

In this way, according to the direction changing device according to the present invention, obstacles can be easily avoided.

Further, the direction changing device according to the present invention can also be applied to a running toy that does not fall into holes (non-hole) as shown in FIG. That is, the direction changing device of the above embodiment is incorporated into a non-hole type running toy 50 shown in FIG. . In addition, by rotatably supporting the rotary lever 52 with a bearing 51 at the lower part of the body, the tip end 52a and the rear end 52b can be raised and lowered, and the tip end is curved when traveling on a flat surface. While the rear end portion 52a is in sliding contact with the flat surface, the rear end portion 52b
is positioned directly below the rotating shaft 15 of the worm gear body 16. In addition, there are 2
Front wheels (driven wheels) 53, 53 are installed to rotate freely.

With this configuration, when the front part of the traveling toy 50 approaches a hole or a space at the end of a desk, the tip part 52a of the rotating lever 52 can be moved before the front wheels 53, 53 come off. enters the hole or the space at the end of the desk, and the rotating lever 52 rotates counterclockwise as shown by the two-dot chain line in FIG. That is, while the front end 52a side is lowered, the rear end 52b side is raised, and the rotation shaft 15 is pushed up by the rear end 52b.

Then, the worm gear body 16 rises and is connected to the worm gear body 25 via the reverse rotation transmission gears 22 and 27, and one of the drive wheels 4 rotates in the reverse direction, so that the traveling toy 50 moves to the right. Convert it to avoid derailment into the hole or end space of the desk. Then, when the tip end 52a of the rotating lever 52 escapes from the hole or the end space of the desk and comes into sliding contact with the flat surface again, the traveling toy returns to normal straight running.

With such a simple configuration, it can also be applied to traveling toys that avoid holes and edge spaces of desks.

Effects According to the present invention, a simple gear mechanism that does not use a complicated cam mechanism is adopted, and the gear that moves when a load exceeding a predetermined level is applied to the drive wheels, such as when a traveling toy hits an obstacle, etc. Since the meshing relationship of the gear group is changed by changing the meshing relationship of the gear group to change the direction and thereby avoid obstacles, the number of parts is reduced compared to the conventional direction changing device that uses a complicated cam mechanism. The configuration is simple with fewer
It has become easier to manufacture and handle.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is an exploded perspective view of the direction changing device, Fig. 2 is a plan view, and Fig. 3 is an exploded perspective view of the direction changing device.
The figure is a rear view, and FIG. 4 is an explanatory side view showing another embodiment. 1, 2... Drive shaft, 3, 4... Drive wheel, 5...
Motor (drive source), 6... Gear group, 7... Frame, 9, 10... Worm wheel, 16, 25
... Worm gear body, 16a, 25a ... Worm, 16b, 25b ... Gear, 21 ... Same direction rotation transmission gear, 22, 27 ... Reverse direction rotation transmission gear.

Claims (1)

[Scope of utility model registration request] A pair of left and right drive shafts each having a worm wheel fixed to an inner end side and a drive wheel fixed to an outer end side, a worm gear body that meshes with the worm wheel at a worm portion, and these worm gear bodies.
A co-rotation transmission gear and a reverse rotation transmission gear that can connect the gear parts of the gear bodies in a same-rotation/reverse-rotation relationship, and a rotational force from a drive source to a gear on one side of the worm gear body. The worm gear body on the side to which the rotational force is applied from the drive source is disposed in a direction substantially perpendicular to the one drive shaft, and is movable up and down and constantly rises or falls. A traveling toy, characterized in that the traveling toy is provided with a moving force in the direction, and is arranged so that it can selectively mesh with the same direction rotation transmission gear and the opposite direction rotation transmission gear depending on the raised position and the lowered position. Direction changing device.