JPS6130708Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic direction change device that automatically changes the direction of travel of a toy vehicle, particularly a vehicle equipped with a motor, and continues traveling by automatically changing the direction of travel when it hits an obstacle while traveling.

B. Purpose of the invention A variety of devices have been implemented to date for toy cars that are equipped with devices that change direction when they hit an obstacle while in motion, but in all cases, the structure was It is complicated, has relatively high manufacturing costs, and has the disadvantage that the operating mechanism cannot be miniaturized.

The purpose of this invention is to provide a simple and reliable automatic direction change device that can be implemented in a toy minicar with a simplified structure.

B. Structure of the invention The main invention will be explained by an example shown in the drawings.
A roller 2 serving as a front wheel is installed at the center of the bottom of the vehicle body 1 near the front end, and the rear wheels 3 and 4 are attached to the outer ends of drive shafts 5 and 6, which are divided into two parts.
Crown gears 7 and 8, each having a required outer diameter, are installed at the inner end of the crown gear 7 and 8, separated by a required distance, and on the back of the crown gear 7,
The rear end of a transmission shaft 12 that is provided with a tomoe-shaped cam 9 concentrically and an annular edge 11 with cutouts 10 at required locations, and is installed between crown gears 7 and 8 so as to be able to slide back and forth. A pinion 13 attached to the transmission shaft 12 is normally meshed with the crown gear 7, and an annular edge 11 is provided on one side of a sliding bearing 14 fixed on the transmission shaft 12 to correspond to the sliding movement of the transmission shaft 12. A key-shaped piece 15 is provided which is engaged and detached by a tomoe-shaped cam 9, and the front end of the transmission shaft 12 has its lower end pivoted 16 to the lower front end of the vehicle body, and its upper front surface attached to the back of a bumper 17 supported on a support frame. The pinion 13 is brought into contact with the worm 19 on the output shaft of the motor 18 installed inside the vehicle body, and the intermediate shaft 2.
The pinion 21 on the 0 and the worm 22 are related to each other.

C. Effect of the present invention Since the present invention is constructed as described above, when the motor 18 is started when the bumper 17 is in the normal position as shown in FIG. 2, the pinion 13 meshes with the crown gear 7. As a result, the crown gear 7 is rotated, and the rear axle 3 attached to the outer end of the drive shaft 5, which is firmly inserted into the shaft tube 24 of the crown gear, is rotated.
Also, since the crown gear 8 to which the inner end of the shaft tube 24 is fitted is also rotated as the crown gear 7 rotates, the drive shaft 6
The rear wheels 4 attached to the outer ends of the wheels also rotate in the same direction as the rear wheels 3. Therefore, the vehicle body 1 moves straight ahead correctly. If the bumper 17 hits an obstacle while the vehicle is traveling and tilts backward from the position shown by the solid line in FIG. 2 as shown by the chain line, the transmission shaft 12 moves backward together with the sliding bearing 14. At the same time, when the key-shaped piece 15 comes into contact with the annular edge 11 provided on the back surface of the crown gear 7 and coincides with the notch 10, the key-shaped piece 15 is hooked on the edge of the annular edge facing the notch. It is pulled inward of the annular edge 11 and comes into contact with the periphery of the toe-shaped cam 9. As a result, the pinion 13 moves between the crown gears 7 and 8 and meshes with the crown gears 7 and 8. At this time, the crown gear 8 is fitted into the inner end of the shaft tube 24 of the crown gear 7, but since the fitting is loose, the crown gear 8 does not rotate in the opposite direction to the crown gear 7. , therefore rear wheel 3
and 4 rotate in the opposite direction. Therefore, the vehicle body 1 is directly turned in its direction of travel. Once the direction of movement has been changed in this way, the key-shaped piece 15, which is drawn into the annular edge 11 on the back surface of the crown gear 7 and whose end edge is in contact with the toe-shaped cam 9, is As it rotates, it is pushed back forward by the tomoe-shaped cam and returns to the outside of the annular edge, causing the front end of the transmission shaft 12 to touch the bumper 1.
7 to return to normal. As a result, the vehicle returns to straight forward motion as the rear wheels rotate normally.

D. Effects of the present invention As described above, the present invention uses a simple device to accurately change the direction of travel each time the vehicle hits an obstacle, and then has a clever action to return to normal travel. Moreover, unlike conventional automatic direction changing devices, the device has an extremely simple structure, has a small number of parts, is easy to assemble, and is suitable for compact construction, so it is suitable for extremely small vehicles such as miniature cars. It is suitable and effective for use in cars.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the overall appearance, FIG. 2 is a sectional view showing the main parts, and FIGS. 3 and 4 are views from the bottom side of the vehicle body.
5 is an exploded perspective view of the drive device, and FIG. 6 is a bottom elevational view of the vehicle body. 1... Vehicle body, 3, 4... Rear wheel, 5, 6... Drive shaft, 7, 8... Crown gear, 9... Tomoe-shaped cam, 10
... Notch, 11 ... Annular edge, 12 ... Transmission shaft,
13...Pinion, 14...Sliding bearing, 15...
Key-shaped piece, 17...Bumper, 20...Intermediate shaft, 2
4...Axis tube.

Claims (1)

[Scope of utility model registration request] The left and right rear wheels 3 and 4 are respectively attached to the outer ends of drive shafts separated from the center, and crown gears 7 and 8 having different large and small diameters are respectively attached to the inner ends of both drive shafts, and at the required intervals. A tomoe-shaped cam 9 and an annular edge 11 along the circumference are provided on the back side of one of the crown gears 7, and a notch 10 of a required length is provided at a predetermined location of the annular edge 11. A pinion 13 that meshes with the crown gears 7 and 8 is attached to the rear end of the transmission shaft 12, and this pinion and a worm 19 attached to the output shaft of the motor 18 are connected via an intermediate transmission shaft. In relation to this, the front end of the transmission shaft 12 with the pinion 13 attached is pivotally supported on the bottom of the front end of the vehicle body 1, the upper front side is brought into contact with the inner surface of the bumper 17 supported on the support frame, and the transmission shaft near the pinion 13 is A sliding bearing 14 is mounted on the transmission shaft 12 on one side of the bearing.
An automatic direction change device for a toy traveling vehicle, characterized in that a key-shaped piece 15 is provided for engaging and disengaging an annular edge 11 and a tomoe-shaped cam in response to the forward and backward sliding movement of the toy.