JPH0615672Y2 - Gear device in mainspring unit - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a two-wheel traveling toy equipped with a driving spring, and a mainspring unit in which the gear shafts of the gears constituting the gear mechanism provided on the chassis are previously formed integrally with the chassis. The gear device in.

(Prior Art and Problems Thereof) As a conventional traveling toy for a two-wheeled vehicle, for example, as shown in the plan vertical cross-sectional view of FIG. 11, driving from a mainspring unit 20 arranged on one side wall 8 of the front part of the chassis 1. There is a configuration in which the torque is transmitted to the gear 5a on the axle on one side of the rear wheel 5 via the gears 4a, 4b, 4c axially supported on the side wall 8. Each of these gears has a structure integral with the rotating shaft, and has a structure in which the rotating shaft is rotatably supported by a bearing portion formed on the side wall 8 of the chassis 1.

However, in the conventional two-wheel traveling toy, since the rotating shaft integrated with each gear is rotatably supported in the bearing hole formed in the side wall of the chassis, when the gear is assembled to the chassis. However, even if the rotary shaft of the gear is inserted into the bearing hole, the rotary shaft easily falls off, the rotary shaft is not easily fixed, the workability is remarkably poor, and the manufacturing cost is high.

Further, it is preferable that the gear device in a small toy such as a two-wheel traveling toy has a gear mounting space as small as possible.

(Purpose of the Invention) The present invention has been made in view of the above, and in order to simplify the work of mounting the gear, improve the productivity, and reduce the cost, the gear shaft is previously formed integrally with the chassis. The present invention provides a gear unit in a mainspring unit, which is configured so that only a gear can be rotatably fixed to the gear shaft at the time of assembly, and a gear mounting space can be reduced.

(Means for Achieving the Purpose) In order to achieve the above object, the gear device in the mainspring unit according to the present invention is configured such that the mainspring, the gear mechanism, and the axle of the drive wheel are provided in the chassis with the output shaft of the mainspring having the gear mechanism. In the mainspring unit arranged so as to be linked to the axle via the above, at least one gear constituting the gear mechanism is held as follows.

(A) The chassis is formed by integrally connecting split cases that are formed separately. (B) At least a gear shaft is formed on an inner wall surface of the chassis so that the gear shaft constitutes the gear mechanism. It is rotatably inserted through a bearing hole formed in one gear. (C) A vertical slit is formed in the gear shaft, and a gear retaining portion is formed at the tip of the slit. (D) The retaining portion is thinly formed on the outer peripheral surface of the tip of the gear shaft (Example) Hereinafter, the gear device in the mainspring unit of the present invention will be described in detail.

FIG. 1 shows a two-wheel traveling toy using a gear device according to an embodiment of the present invention. The two-wheel traveling toy has a chassis 1 shown in FIG.
And a handle support portion 11 that is formed to project from the front of the chassis 1.
The steering shaft 2 supported by the steering shaft 2, the handle 3 fixed to the upper end of the steering shaft 2, the front wheel 4 rotatably supported on the lower end of the steering shaft 2, and the support hole 12 at the rear of the chassis 1. The rear wheel 5 is rotatably supported and is generally configured.

As shown in FIG. 10, the rear wheel 5 has gears 5a and 5b on each axle that protrudes left and right from the axis. The chassis 1 has a two-part structure composed of cases 1a and 1b. Inside the hollow thereof, a mainspring unit 20 as shown in FIGS. 3 to 5, and a drive torque from the mainspring unit 20 is applied to the rear wheel 5. It has a first transmission gear mechanism 30 and a second transmission gear mechanism 40 for transmitting to both gears 5a, 5b. Each case 1a and 1b has a protrusion 50a,
50b and recesses 51a and 51b are formed, and these are fitted together to be united.

The mainspring unit 20 is composed of a mainspring box 21 shown in FIG. 5 (a) and a mainspring 22 housed in the mainspring box 21, and the mainspring box 21 is projected from the side wall 8 of the case 1a as shown in FIG. It has a locking hook 21a that engages with the locking hook 6a, and is attached to the case 1a by engaging these locking hooks 6a and 21a. Further, spacers 55 (FIG. 8) are provided on the side wall of the case 1a and the mainspring box 21 so that the box is set at the center of the chassis. In addition, a support hole 21b for a bearing is formed in the peripheral portion of the mainspring box 21 at a position protruding in the outer diameter direction.

As shown in FIG. 5A, the first transmission gear mechanism 30 has a short shaft 31a and a long shaft 31b rotatably and detachably supported by a hole 6b of the case 1a and a hole 7a of the case 1b. Output gear 31, a first intermediate gear 32 that is detachably supported by a hole 6c of the case 1a, and a gear shaft 9 that projects from the side wall of the case 1a. And a first final gear 33 that meshes with one of the rear wheel gears 5a. The gears 31, 32, 33 are in mesh with each other in sequence, and the driving torque from the mainspring unit 20 is transmitted to the rear wheels by the final gear 33.

Next, a gear shaft 9 integrally provided on the inner wall of the case 1a
As shown in FIG. 3 (b), there is a slit 9a in the vertical direction.
Is formed, and a gear retaining portion 9b is formed at the tip thereof. The retaining portion 9b is formed thin on the outer peripheral surface at the tip of the gear shaft 9. On the other hand, a bearing hole 33a is formed in the final gear 33.
To mount the final gear 33 on the gear shaft 9, the bearing hole 33a
Should be inserted into the gear shaft 9. At this time, when both sides of the slit 9a of the gear shaft 9 are compressed inward, the retaining portion 9b becomes smaller than the bearing hole 33a of the final gear 33, so that it can be easily inserted and supported. After insertion, the final gear 33 is not pulled out by the retaining portion 9b of the gear shaft 9.

As shown in FIGS. 5A and 5B, the second transmission gear mechanism 40 has two locking projections which are inserted from the axial center hole into the long shaft 31b of the first output gear 31 and project from the central portion. 41a
The second output gear 41 fixed to the first output gear 31 and the mainspring box 21 by fitting the above into the two recesses 31c formed on the major axis side surface of the first output gear 31. The rotation shaft 42a is rotatably supported by the support hole 21b of the second and the hole 7b of the case 1b, and
Second intermediate gear 42 having a small gear 42b that meshes with the output gear 41 of No. 2 and the second final gear supported by the gear shaft 10 projecting on the side wall of the case 1b so as to be rotatable and non-pullable. And a gear 43. The second final gear 43 meshes with the rear gear 5b. Further, the inner end of the mainspring 22 is locked between the two locking projections 41a of the second output gear 41, and when the rear wheel 5 is rotated backward in the reverse direction, the first and second Transmission gear mechanism 30,
The rewinding force of the mainspring when the mainspring 22 is wound up via 40 (final gears 33 and 43, intermediate gears 32 and 42, output gears 31 and 41) to accumulate driving energy, and the load on the rear wheels is removed. Each gear is rotated by and drives rear wheel 5 in the forward direction.

The gear shaft 10 and the final gear 43 are constructed and attached in the same manner as the gear shaft 9 and the final gear 33.

Although only the rotary shaft of the final gear is integrated with the inner wall of the chassis in the above embodiment, the same configuration can be applied to other gears.

(Effects of the Invention) As described above, according to the gear device in the mainspring unit of the present invention, the gear shaft is integrally formed in advance in the split case that constitutes the chassis, and when the gear is assembled, the rotary shaft Since only the gears need to be rotatably inserted into the split case, the laborious work of penetrating the rotary shaft into the split case as in the past is unnecessary, so the work is simplified, the productivity is improved, and the cost is low. In addition to that, the end portion of the rotating shaft is not exposed to the surface of the case as in the conventional case, and the appearance is not spoiled.

Further, the slit and the retaining portion are formed to such an extent that the retaining portion becomes smaller than the bearing hole of the gear when the both sides of the slit of the gear shaft are compressed inward.
A gear can be inserted into and supported by the gear shaft. The retaining portion of the gear is thinly formed on the outer peripheral surface of the tip of the gear shaft, and does not extend to the tip side of the gear shaft. Therefore, the length of the entire gear shaft can be minimized, and the gear can be stored in a small space. Therefore, according to the present invention, it is possible to obtain the gear device in the mainspring unit suitable for a small toy.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of a two-wheeled traveling toy using the gear device of the present invention, FIG. 2 is a structural explanatory view of a chassis, and FIG. 3 (a) is a case in which a mainspring unit or the like is incorporated in one case. FIG. 4 (b) is a cross-sectional explanatory view of the gear device according to the present invention, FIG. 4 is an explanatory view of each case seen from the opening side, and FIGS. 5 (a) and 5 (b) are mainspring units. , First
And a plan sectional view showing a positional relationship between the second transmission gear mechanism and a partially enlarged view thereof, FIGS. 6 and 7 (a) and (b) are configuration explanatory views of the box and the first output gear, and FIG. The figures are explanatory views of the engagement state between the box and the case, FIGS. 9 and 10.
FIG. 11 is a structural explanatory view of a second output gear and rear wheels, and FIG. 11 is a structural explanatory view of a conventional two-wheel traveling toy. Reference numeral 1 ... chassis, 1a, 1b ... split case, 9 ... gear shaft, 9a ... slit, 9b ... retaining portion, 33a
...... Bearing hole, 30 ...... First transmission gear mechanism, 40 ...... Second transmission gear mechanism, 31 ...... First output gear, 32 ......
First intermediate gear, 33 ... First final gear, 41 ... Second output gear, 42 ... Second intermediate gear, 43 ... Second
Final gear of the intermediate gear

Claims (1)

[Scope of utility model registration request] 1. A mainspring unit in which a mainspring, a gear mechanism, and an axle of a drive wheel are arranged in a chassis so that an output shaft of the mainspring is linked to the axle via the gear mechanism. A gear device in a mainspring unit, characterized in that it holds at least one of the constituent gears as follows. (A) The chassis is formed by integrally connecting split cases that are formed separately. (B) At least a gear shaft is formed on an inner wall surface of the chassis so that the gear shaft constitutes the gear mechanism. It is rotatably inserted through a bearing hole formed in one gear. (C) A vertical slit is formed in the gear shaft, and a gear retaining portion is formed at the tip of the slit. (D) The retaining portion is thinly formed on the outer peripheral surface of the tip of the gear shaft.