JPH046794Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to the improvement of a rotation transmission device for traveling toys, and prevents the rotation transmission mechanism from being damaged due to sudden rotation in the opposite direction. This is how it was done.

(Prior art and its problems) Various types of traveling toys have been proposed in the past, and the inventor of the present invention also proposed
We proposed a six-wheeled toy as a running toy. In the device proposed in the same application, the running wheels are composed of a front wheel, an intermediate wheel, and a rear wheel, and the rotational force of the flywheel is transmitted to each of the wheels via a gear mechanism, and The axle of the front wheel is positioned higher than the axle position of the intermediate wheel and the rear wheel. At the same time, by making the overall shape of the toy roughly egg-shaped, even if the toy hits an obstacle such as a wall, it can change direction through a series of movements: standing up, falling over, rolling over, and getting back up. .

In this toy, a small diameter transmission gear is attached to the flywheel via a ratchet mechanism,
When a finger or the like touches the rotating wheel, the pawl provided on the small-diameter transmission gear comes off the ratchet, leaving only the flywheel to idle.

However, subsequent studies have shown that, for example, when a user rubs a wheel in the running direction against a floor, etc. to rotate the flywheel, and then immediately rubs the wheel in the opposite direction, the above-mentioned rotational force transmission When a strong reversing force is applied to the gear mechanism, the teeth of the ratchet attached to the flywheel and the locking pawl provided on the transmission gear strongly rub against each other, causing the teeth of the ratchet and the locking pawl to wear out. , it could get damaged.

Therefore, even if an attempt was made to move the flywheel forward again, the ratchet and the locking pawl would not engage with each other, resulting in a problem that the rotational force of the flywheel could not be transmitted.

(Means for solving the problems) The configuration of the present invention is shown in FIGS. 1 to 5 corresponding to embodiments.
To explain according to the figure, a traveling toy has a flywheel 4 to which a transmission gear 5 is attached via a ratchet mechanism, and a gear group for transmitting the rotational force of the flywheel 4 to the wheels via the transmission gear 5. In the rotation transmission device, the intermediate gear 7 that transmits the rotational force of the flywheel 4 to the wheel rotation gears 8 to 14,
It is composed of a coaxial large-diameter gear 7a and a small-diameter gear 7b, and a pin 34 passes through these gears in the axial direction, and the small-diameter gear 7b can be slid onto the pin.

(Function) When a sudden reversal force is applied to the intermediate gear 7 that transmits the rotation of the flywheel 4 to the gears of each wheel, the small diameter gear 7b slips against the pin 34, causing the gear meshing with the large diameter gear 7a to slip. It can prevent strong reversing force from being transmitted to the group 6, and the locking pawl 31 integrally molded on the small diameter gear 5 will strongly rub against the pawl part 34 of the flywheel ratchet 32, causing wear and damage. You can prevent it from happening.

(Example) Specific examples of the present invention will be described below with reference to the accompanying drawings. First, Figure 1 is a plan view showing the wheel drive mechanism of the traveling toy according to the present invention, and Figure 2 is a combination of gears. FIG.

The present invention has a total of six wheels symmetrically, with 1 and 1a being front wheels, 2 and 2a being intermediate wheels, and 3 and 3a being rear wheels.

These wheels are rotated by the rotational force of the flywheel 4.
It is supposed to rotate. That is, a small diameter gear 5 is attached to the center of the flywheel 4, and the rotational force of the flywheel 4 is transmitted by the small diameter gear 5.
The signal is first transmitted to the first gear 6 via.

The means for attaching the small-diameter gear 5 to the flywheel 4 is the same as that of Utility Model Application Publication No. 184898/1983, which was previously proposed by the inventor of the present invention. That is, as shown in FIGS. 3 and 4, a locking pawl 31 is formed on the small diameter gear 5, and a locking pawl 31 is formed on the shaft 30 of the flywheel 4.
The small diameter gear 5 is rotatably passed through the flywheel 4, and a ring-shaped ratchet 32 is attached to the flywheel 4.
is attached, and the locking pawl 31 is lightly pressed against the surface of the flywheel 4 by the inner diameter edge 33 of the ring-shaped ratchet 32. When the small diameter gear 5 rotates in the direction of the arrow in FIG. However, when an external force is applied to the small diameter gear 5, the engaging pawl 31
is removed from the pawl 34 of the ratchet 31, and only the flywheel 4 can rotate independently.

On the other hand, the first gear 6 is comprised of a large diameter gear 6a and a small diameter gear 6b, the large diameter gear 6a meshes with the small diameter gear 5 of the flywheel, and the small diameter gear 6b It meshes with the diameter gear 7a.

As shown in FIG. 5, the second gear 7 is formed of a large diameter gear 7a and a small diameter gear 7b formed at the other end of the axle 7c of the large diameter gear.
A pin 34 passes through the axle 7c of these gears. The axle 7c is split in the middle, so that the small diameter gear 7b can slip against the pin 34 when a strong force is applied to the small diameter gear 7b.

In this embodiment, the entire length L of this second gear 7
is 10, the length L' of the small diameter gear 7b is 6,
The ratio is set at around 5. If the small diameter gear side is made longer in this way, the small diameter gear 7b and pin 34
Since the frictional resistance between the gear and the gear is increased, the small-diameter gear will not slip even with a small force, and rotation transmission will be performed reliably under normal conditions. Note that this small diameter gear 7b meshes with the third gear 8.

The third gear 8 is connected to the axle 15 of the front wheels 1, 1a.
It meshes with a fourth gear 9 attached to the intermediate wheels 2, 2a, and also meshes with a fifth gear 10 fixed to the axles of the intermediate wheels 2, 2a.

The fifth gear 10 meshes with a sixth gear 11 which is an intermediate gear, and the sixth gear 11 meshes with a seventh gear 12.
Furthermore, the seventh gear 12 meshes with the eighth gear 13 in sequence, and the eighth gear 13 meshes with the ninth gear 14 attached to the rear wheel axle 17.

Note that each of the gears is pivotally mounted at appropriate positions on the casing 21.

On the other hand, the axle 1 of the front wheels 1, 1a in the present invention
5 is another intermediate wheel 2, 2 as shown in FIG.
It is provided at a higher position (for example, about 1/4 of the diameter of each wheel) than the axle 16 of the wheel a and the axle 17 of the rear wheels 3 and 3a. Therefore, the intermediate wheels 2,2
When the front wheels 1 and 1a are in contact with the horizontal surface, the front wheels 1 and 1a are floating above the horizontal surface. In principle, this provides the same functionality as when the front wheels are made larger in diameter.

The above configuration is similar to that proposed in the above-mentioned Utility Application No. 59-025885.

In the present invention, a partition plate 20 is attached to a casing 21 that houses the above-mentioned drive mechanism, and this partition plate 2
A ballast storage section 20a is formed in the storage section 2.
A required number of metal ballasts 19 are stored in 0a. This ballast is for positioning the center of gravity of the toy body downward.

A wheel 22 as shown in FIG. 1 is fixed to both ends of the axles 15, 16, 17 of each of the wheels, and a rubber tire is mounted on the wheel 22. Also, although not shown in the drawing,
A body is attached to the upper part of the casing 21.

Next, an example of the operation of the toy according to the present invention described above will be explained.

First, when the intermediate wheels 2, 2a and the rear wheels 3, 3a are forced to rotate by rubbing them against the floor, etc. (at this time, the front wheels 1, 1a are lifted off the floor, so they normally do not come into contact with the floor). (No) The flywheel 4 rotates via each gear group described above. When the flywheel 4 rotates in this manner, the inertia of the flywheel 4 causes each of the gears to rotate, causing each wheel to rotate and travel.

In the present invention, if the user rubs the wheel in the direction of the arrow in FIG. 1 as described above, the flywheel 4 rotates at high speed, and then suddenly rubs the wheel in the opposite direction, the second gear The small diameter gear 7b of No. 7 slips on the pin 34, and the large diameter gear 7b slips on the pin 34.
a will stop after a time delay. For this reason, the first gear 6, the small diameter gear 5 attached to the flywheel 4, and the locking pawl 31 provided on this gear 5.
The locking pawl 3 and the pawl portion 34 of the ratchet 32 can be prevented from being applied with a sudden reversing force.
However, it can prevent wear and damage caused by strong rubbing against each other.

Above, the present invention was explained for a six-wheeled vehicle.
It goes without saying that the present invention may also be applied to other traveling toys such as four-wheeled vehicles. Further, the detailed configuration is not limited to what is shown in the drawings, and can be changed as necessary.

(Effects) According to the present invention described above, the intermediate gear that transmits the rotational force of the flywheel to the wheel rotation gear is composed of a coaxial large-diameter gear and a small-diameter gear, and the axial direction of these gears is While passing the pin through,
By making the small-diameter gear slippable relative to the pin, even if the user suddenly moves the wheel forward or backward, the small-diameter gear will slip and no undue force will be applied to the subsequent gear mechanism. First, excessive friction does not occur on the locking pawl of the ratchet, thereby preventing damage and abrasion of these mechanisms.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the drive mechanism of the invention, Fig. 2 is a conceptual diagram showing the combination of gears, Fig. 3 is a rear view of the ratchet mechanism of the invention, and Fig. 4 is a flywheel of the invention. FIG. 5 is a cross-sectional view showing the attachment state of the wheel and the ratchet mechanism, and FIG. 5 is a cross-sectional view of the second gear of the present invention. In the figure, 1 and 1a are front wheels, 2 and 2a are intermediate wheels, 3 and 3a are rear wheels, 4 is a flywheel, 7 is a second gear, 7a is a large diameter gear, 7b is a small diameter gear, 3
1 is a locking pawl, 32 is a ratchet, and 34 is a pin.

Claims (1)

[Scope of utility model registration request] A rotation transmission device for a traveling toy that includes a flywheel to which a gear is attached via a ratchet mechanism, and a gear group for transmitting the rotational force of the flywheel to the wheels via the gear. The intermediate gear that is transmitted to the rotating gear is composed of a coaxial large-diameter gear and a small-diameter gear, and a pin is passed through these gears in the axial direction, and the small-diameter gear can be slid onto the pin. A rotating toy transmission device with special features.