JPH0416715Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spring unit box whose drive shaft can be replaced by allowing only the drive shaft to be attached and detached without disassembling other parts.

(Prior art and its problems) As a two-wheel running toy, for example, a unit spring box has a driving part such as a spring, a gear mechanism that transmits the driving force from the spring, and is driven by the driving part via the gear mechanism. There is a structure that accommodates and holds a drive shaft. This traveling toy winds up a mainspring via a gear mechanism by forcibly rotating the tires integrated with the drive shaft, and then rotates the drive shaft in the forward direction using the driving force generated when the mainspring is released. A vehicle configured to move the vehicle body forward has been proposed.

However, when assembling a unit box in a conventional traveling toy, the mainspring, gear mechanism, and drive shaft are attached to one of the two halves of the case in that order, and after the drive shaft has been inserted into the other case, the other case is assembled into one case. This was completed by attaching it to the For this reason, when trying to change the tire for a different type of tire, it was necessary to completely disassemble the case and replace the tire integrated with the drive shaft. For this reason, the task of changing tires was complicated, making it unsuitable for young people.

[Purpose of invention]

The present invention has been made in view of the above, and it is an object of the present invention to provide a mainspring unit box in which the drive shaft can be replaced and the tire integrated with the drive shaft can be detachably supported on the case. purpose.

[Means for achieving the object] In order to achieve the above object, the present invention houses the spring, the drive shaft of the drive wheel of the traveling toy, and the gear mechanism that links these springs and the drive shaft in an integrated box. In addition, it is characterized by having the following requirements.

(a) A gear is integrally provided coaxially with the drive shaft of the drive wheel, and a support wall having bearing holes at both ends of the drive shaft is formed in the box.(b) The support wall includes: (c) The width of the guide groove is approximately the same as the outer diameter of the drive shaft. (d) The drive shaft has a guide groove that opens both bearing holes to the outside. Gears are provided on both sides of the drive wheel, and gears that mesh with each of the gears are provided inside both of the support walls (effect of the invention).As described above, the support walls are provided with the bearings. A guide groove is formed that opens the hole to the outside, and the width of the guide groove is formed to be approximately the same as the outer diameter of the drive shaft.
The drive wheel can be easily removed from the guide groove without disassembling the mainspring unit box, and a different drive wheel can be bearinged in the bearing hole from the guide groove.

Gears are placed on both sides of the drive wheel, and these gears and the gears on the inner support wall mesh with each other, so
Since the load is applied to both ends of the drive shaft in a well-balanced manner, it is possible to prevent the drive shaft from slipping out of one of the guide grooves due to uneven load on the drive shaft at both ends.

Therefore, it is possible to easily attach and detach the drive wheels and enjoy an unprecedented and interesting driving experience.

(Example) An example of an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral A indicates a two-wheeled toy using a spring unit box according to the present invention. This two-wheeled vehicle traveling toy A includes a chassis 1, a steering shaft 2 supported by a handle support portion 1a protruding from the front of the chassis 1, and a handle 3 fixed to the upper end of the steering shaft 2. , and a front wheel 4 rotatably supported at the lower end. A spring unit box a having a drive wheel (rear wheel) 5 is incorporated in the chassis 1.

The mainspring unit box a includes a case body 6 formed by case members 6a and 6b that can be divided into left and right parts, a first gear mechanism 10 provided on one case member 6a, and a first gear mechanism 10 provided on the other case member 6b. The second gear mechanism 20 and the case body 6
A drive wheel 5 in which a drive shaft 8 is supported in bearing holes 7a, 7a formed in support walls 6c, 6c at the lower rear.
It is composed of. Guide grooves 7b, 7b are formed in the support walls 6c, 6c to open the bearing holes 7a, 7a to the outside. And guide groove 7
The width of b is approximately the same as the outer diameter of the drive shaft 8.

The drive wheel 5 is composed of a rubber tire portion 5a and a wheel 5b, and the wheel 5b is made of metal. Further, the drive wheels 8 on both sides of the drive wheel 5 are provided with pinions 9, 9.

As shown in FIGS. 4 and 5a, the first gear mechanism 10 includes a bearing hole 1 in a support wall 6c of a case member 6a.
1, a first output gear 1 rotatably supported by a shaft 13;
4, and a long hole 12 provided in the case member 6a.
The first intermediate gear 15 is rotatably supported by a first intermediate gear 15 pivotally supported by a gear shaft 16 formed on a support wall 6c of the case member 6a, and meshes with one pinion 9 of the drive wheel 5. It is composed of a first final gear 17. And each of the gears 14,
15 and 17 are formed by sequentially meshed spur gears, and the first final gear 17 meshes with one pinion 9 of the drive wheel 5.

Next, the second gear mechanism 20 has a second output gear 21 fixed coaxially with the shaft 13 supported by the case member 6b, as shown in FIGS. 4 and 5b.
and a pinion 23a that is removably pivoted in a long hole 22 vertically bored in the case member 6b.
the second intermediate gear 23 and the case member 6b.
and a second final gear 25 rotatably supported by a gear shaft 24 protruding from the side wall 6c. The second final gear 25 is meshed with the other pinion 9 of the drive wheel 5, and two locking protrusions 21a, 21a integrally provided on one side of the second output gear 21. are fitted into two fitting recesses 14a, 14a formed on opposing surfaces of the output gear 14.

Reference numeral 30 indicates a mainspring, and one end of this mainspring 30 is connected to the projecting pieces 21a, 21 of the second output gear 21.
a, and the other end is fixed to the case body 6. When the drive wheel (rear wheel) 5 is reversely rotated backward, the mainspring 30 is wound through the gear mechanisms 10 and 20 to accumulate drive energy, and when the load on the drive wheel 5 is removed. The gear mechanism 10, 20 is rotated by the unwinding force of the mainspring 30, and the driving wheel 5 is rotated.

As mentioned above, the support walls 6c, 6 of the case member 6
Guide grooves 7b, 7b are formed in c for opening the bearing holes 7a, 7a to the outside, and the width of the guide groove 7b is formed to be approximately the same as the outer diameter of the drive shaft 8, so that the mainspring unit box The drive wheel 5 can be easily removed from the guide grooves 7b, 7b without disassembling the drive wheel 5, and different drive wheels can be bearinged in the bearing holes 7a, 7a from the guide grooves 7b, 7b.

Gears are placed on both sides of the drive wheel, and these gears and the gears on the inner support wall mesh with each other, so
Since the load is applied to both ends of the drive wheel in a well-balanced manner, it is possible to prevent the drive shaft from slipping out of one of the guide grooves due to uneven load on the drive shaft at both ends.

Therefore, it is possible to easily attach and detach the drive wheels and enjoy an unprecedented and interesting driving experience.

[Brief explanation of the drawing]

Fig. 1 is a front view of a two-wheeled toy using the spring unit box according to the present invention, Fig. 2 is a perspective view of the spring unit box, and Fig. 3 is an exploded perspective view of a portion of the spring unit box. Figures 5a and 5b, explanatory diagrams of the internal structure of the box, illustrate the meshing state of the first and second gear mechanisms. Code, A...Two-wheeled vehicle running toy, a...Spring unit box, 1... Chassis, 5... Drive wheel,
6a, 6b...Case member, 6c...Supporting wall, 7
a...bearing hole, 7b...guide groove, 10...first gear mechanism, 20...second gear mechanism, 30...spring.

Claims (1)

[Scope of Claim for Utility Model Registration] A mainspring, a drive shaft of a driving wheel of a traveling toy, and a gear mechanism that links these mainsprings and the drive shaft are housed in an integrated box frame, and the following requirements are provided. Spring unit box with replaceable drive shaft. (a) A gear is integrally provided coaxially with the drive shaft of the drive wheel, and a support wall having bearing holes at both ends of the drive shaft is formed in the box.(b) The support wall includes: (c) The width of the guide groove is approximately the same as the outer diameter of the drive shaft. (d) The drive shaft has a guide groove that opens both bearing holes to the outside. Gears are provided on both sides of the drive wheel, and gears that mesh with the respective gears are provided inside both of the support walls.