JPS6130710Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drive device for a traveling toy such as a miniature car that uses a mainspring as a drive source.

As shown in FIG. 4, the inventor of the present application first transmitted a driving gear 18 rotating by the driving force of a mainspring (not shown) to a pinion gear 20 of a transmission gear 19 as shown in FIG. Axle gear 23 in which a bevel gear 21 coaxial with the pinion gear is provided on the axle 22
He proposed a system that would drive this axle in rotation (Kokōkō 1977-30540).

In the drive device in this example, when the mainspring is wound, the drive gear 18 rotates clockwise in FIG. 4, and the bevel gear 21 moves downward in the figure via the pinion gear 20 meshing with this gear. , the gear 21 remains disengaged from the axle gear 23. When the mainspring rebounds, the drive gear 18 rotates counterclockwise, so the bevel gear 21 moves upward in the figure and engages with the axle gear 23, and the shaft 22 rotates in the engaged state. In the conventional example, the axle gear maintains engagement with the bevel gear 21 when the toy is running, that is, when the spring rebounds, so after the rotational force of the bevel gear is transmitted, this "engagement" acts as resistance of the rotating axle gear. It will work. For this reason, there was room for further improvement in the conventional example in order to solve the problem of making the toy travel faster or further with the same driving force of the mainspring.

The purpose of the present invention is to solve the above problems, that is, to make a toy travel faster or farther.

The present invention is constructed from the viewpoint that the problem of the conventional example can be solved by engaging the axle gear when transmitting the rotational force of the bevel gear, but disengaging after the transmission. In other words, the features of the present invention are that a transmission gear is swingably mounted vertically on the machine frame, the crown gear of this transmission gear is able to be engaged with and detached from an axle gear, and a pinion gear coaxial with the crown gear is engaged with a drive gear. It's there.

An embodiment of the present invention will be described below based on the drawings. In FIGS. 1 and 2, bearing parts 2 and 2 of the machine frame 1 are shown.
An axle 3 is rotatably supported on the axle, and an axle gear 4 is fixed to one end of the axle. The axle gear is housed in an opening 5 provided at the bottom of the machine frame 1 with a gap S therebetween, and the axle gear 4 is movable together with the axle 3 by the distance of this gap.

A transmission gear 6 is vertically installed above the axle 3, and includes a crown gear 7 and a pinion gear 8 coaxially provided above the gear. As shown in FIGS. 2 and 3, the upper shaft end 6a of the transmission gear 6 is rotatably supported on the upper surface of the machine frame 1, and the lower shaft end 6b is supported by a bearing extending from the bottom of the machine frame and extending over the axle 3. It is located in a long hole 10 provided in part 9, and this long hole has a shape along the axle 3. As a result, the shaft lower end 6b of the transmission gear 6 can swing along the elongated hole 10, and the axle gear 4 can be engaged with and disengaged from the crown gear 7 by moving the axle 3 in the direction of the arrow in FIG. .

A drive gear 11 is attached to the pinion gear 8 of the transmission gear 6.
are meshing. Both upper and lower ends of the shaft 12 of this drive gear are rotatably supported on the top surface of the machine frame 1 and the bottom surface of the machine frame 1, respectively. One end of a spring 13 is fixed to the upper end of the shaft 12, and the other end is fixed to a spring case 14. Note that a pawl may be provided at the other end of the mainspring, and the pawl may be removably latched to each of a plurality of grooves provided in the inner peripheral portion of the mainspring case.

In FIG. 1, 15 is a rear wheel attached to both ends of the axle 3, 16 is a front wheel, and 17 is a vehicle body.

Next, the operation will be explained. First, mainspring 13
To wind the wheel, push the axle 3 in the direction of the solid arrow in Figure 2, press the rear wheel 15 against the floor, and move it backwards.The axle gear 4 engages with the crown gear 7 and transmits the information. The crown gear 7 of the gear 6 is rotated clockwise in FIG. 1, and the drive gear 11 is rotated counterclockwise via the pinion gear 8, thereby winding the mainspring 13. After winding the mainspring, when the car body 17 is released, the instantaneous force of the mainspring 13 causes the drive gear 11 to rotate clockwise at once, causing the crank gear 7 to rotate via the pinion gear 8, and this rotational force is transferred to the axle gear. Axle 3 through 4
As a result, the vehicle body 17 runs.

Since the transmission gear is swingably disposed vertically, the crown gear 7 can mesh smoothly with the axle gear when the axle gear 4 is pushed in. And mainspring 13
If you release the car body 17 after tightening the
Since the lower end 6b of the transmission gear momentarily swings toward the axle gear side, the axle gear to which the rotation is transmitted from the crown gear 7 is pushed back in the direction of the chain arrow in FIG. Instantly cancels the connection. The axle gear 4 separates from the crown gear 7 at the same time it receives the rotational force, and is accelerated by the weight of the vehicle body 17 and wheels 15, allowing the vehicle to travel at once.

As explained above, according to the present invention, since the transmission gear that transmits the rotational driving force from the drive gear to the axle gear is installed vertically, the drive device itself can be made more compact. It is possible to downsize the traveling toy and provide a low-cost toy. In addition, by vertically disposing the transmission gear so that it can swing, the transmission gear is positioned vertically and in a well-balanced manner due to its own weight, allowing for smooth engagement and disengagement between the transmission gear and the axle gear. The balance of the toy can be maintained, and since the toy does not travel while the axle gear remains engaged with the transmission gear as in the past, the toy can travel at high speed or over a long distance.

[Brief description of the drawings]

Fig. 1 is a cross-sectional plan view of a drive device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3 is a sectional view showing the meshing state of the transmission gear and the drive gear. , FIG. 4 is a plan view showing a conventional drive device. 1...Machine frame, 3...Axle, 4...Axle gear, 6
...Transmission gear, 7...Crown gear, 8...Pinion gear, 10...Elongated hole, 11...Drive gear, 1
3...Spring, S...Gap.

Claims (1)

[Scope of claim for utility model registration] An axle gear attached to an axle supported on a machine frame so as to be movable in the axial direction together with the axle; A vertical transmission gear that is provided with a gear to disengage and a pinion gear coaxially with this gear, and a drive gear that meshes with the pinion gear and is equipped with a mainspring. A driving device for a traveling toy featuring: