JPH0255067B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to remotely controlled toy cars, toy boats,
This invention relates to a gear change mechanism that transmits the rotation of a drive motor of a toy airplane or walking animal toy at variable speeds.

[Prior art and its problems]

Conventional methods for changing the drive speed of remotely controlled toy cars, etc. include changing the rotation speed of the drive motor, or changing the drive speed using a transmission gear while rotating the drive motor at a constant speed. I'm going.

Generally, resistance control, voltage control, or field control is known as a method of controlling the rotational speed of a drive motor, but resistance control is sometimes used as a control method for toys due to reasons such as parts cost or durability. In this case, the disadvantage is that the power loss due to the resistor connected in series with the power supply becomes extremely large.

In addition, changing the drive speed using variable gears requires a gear change operation, and a method of changing gears using a motor drive is used as a gear change mechanism for this purpose, but conventional gear change mechanisms of this type are expensive. A servo motor is used to control the positioning of the gear change. However, since it is relatively difficult to change gears while driving, the servo motor is driven under overload for a long time, shortening the life of the servo motor, and requiring frequent replacement of the servo motor. It was hot.

[Purpose of the invention]

An object of the present invention is to provide a gear change mechanism for a remotely controlled toy that can easily and smoothly perform a gear change operation in the process of decelerating and transmitting the rotation of a drive motor using a general-purpose motor without damaging the motor. purpose.

[Key points of the invention]

The present invention connects a general-purpose motor to a gear change arm via a worm gear, a worm wheel, and a connecting crank, and further includes a slide switch that is linked to the gear change arm, and controls a toy drive motor by operating the slide switch. The present invention is characterized in that it is configured to control the rotational speed of a series of driving force transmission gear groups.

That is, in the present invention, by configuring the gear change arm, which is positioned in two different directions by the elasticity of a spring, to be driven by a motor, a general-purpose motor is used to control the gear change arm to operate for a certain period of time, thereby stabilizing the gear change arm. Moreover, a smooth gear change can be realized.

In the gear change mechanism of the remote control toy, it is preferable that a time limit switch is provided in the power supply circuit of the general-purpose motor to control the motor to be driven for a certain period of time.

It is also possible to provide a general-purpose motor stop switch in a part of the slide switch so that the general-purpose motor stops when the gear change arm reaches its operating limit.

Furthermore, a change arm saver is provided on the gear change arm, so that when the fitting part of the transmission gear and shifter does not fit smoothly, an excessive load is not applied to the general-purpose motor, and the operating force is temporarily stored. It is suitable if

Note that it is preferable that the high-speed primary drive gear in the series of drive power transmission gears is connected to the low-speed primary drive gear by a coil spring so as to follow the low-speed primary drive gear, so as to absorb the shock that occurs when changing gears. .

[Embodiments of the invention]

Next, embodiments of a gear change mechanism for a remote control toy according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a gear change mechanism for a wirelessly controlled toy car as an embodiment of the gear change mechanism according to the present invention. That is, in FIGS. 1 to 3, reference numeral 10
indicates a DC general-purpose motor, and this general-purpose motor 10
is connected to power source 12 via a time switch 16 activated by a signal received by antenna 14. The drive gear 18 of the general-purpose motor 10 is meshed with a reduction gear 22 that is pivotally attached to a worm gear shaft 20, and the worm gear 24 provided on the worm gear shaft 20 is meshed with a semicircular worm wheel 26. An elongated hole 28 is formed in the string extension of the semicircular worm wheel 26, and a protrusion 32 provided on the upper surface of one end of the connecting crank 30 is slidably fitted into the elongated hole 28. An action point protrusion 38 is provided on the lower surface of the other end of the coupling crank 30, and an opening 4 formed in the middle of the gear change arm 36 is provided.
0 and is held by change arm savers 42 and 44 pivotally attached to the lower surface of the gear change arm 36. A hole 46 is provided at one end of the gear change arm 36 into which a fitting protrusion of a slide switch arm (not shown) that interlocks with the gear change arm 36 is fitted, and a shifter 48 for changing gears is provided at the other end. It is provided with a grip part 52 that grips the disc part 50 in a loosely fitted state. Both sides of the disk portion 50 of the shifter 48 have fitting convex portions 5 provided with wing portions 54.
6 and 56 are integrally formed and are slidably attached to a hexagonal shaft portion 60 constituting the secondary gear shaft 58 (see FIGS. 1 and 2).

On the other hand, the drive motor 62 has its drive gear 64 meshing with the primary reduction gear 66.
6 is pivotally attached to one end of a primary gear shaft 68 together with a low speed primary drive gear 70. Primary gear shaft 6
A high-speed primary drive gear 72 is rotatably mounted on the other end of the gear 8 and connected to follow the rotation of the primary reduction gear 66 by a coil spring 74 .
The low speed primary drive gear 70 is the low speed secondary reduction gear 76
The high speed primary drive gear 72 is meshed with the high speed secondary reduction gear 78. Low speed secondary reduction gear 76
and high-speed secondary reduction gear 78 are respectively positioned with the shifter 48 in the middle and connected to the secondary gear shaft 5.
8 and are rotatably mounted opposite to each other at both ends. Also, a low speed secondary reduction gear 76 and a high speed secondary reduction gear 7
8 each have a fitting convex portion 5 of the shifter 48.
6 and 56 to engage them in the rotational direction, respectively. A secondary drive gear 84 is pivotally attached to the terminal end of the secondary gear shaft 58 on the side of the low-speed secondary reduction gear 76 .

Further, a power source 88 is connected to the drive motor 62 via a slide switch board 86, and printed wiring plates 90, 92, 94, 96, and 98 are provided on the slide switch board 86. On the other hand, for example, a slide switch arm (not shown) attached to one end of the gear change arm 36
includes contacts 100, 102, 10 that contact the electrode plates 90 and 92, 94, 96, 98, respectively.
4,106 and these contacts 100
and 102, 104 and 106 are electrically connected. 2 and 3, reference numeral 43 is a spring, 45 and 81 are stoppers, 108 is a tertiary reduction gear, 110 is a tertiary drive gear, 112 is an axle gear, and 114 is an axle. In FIG. 1, reference numeral 116 indicates a resistor, respectively.

To operate the gear change mechanism of the wirelessly controlled toy car configured as described above, first, a radio controller (not shown) is operated at a location away from the car body to send a gear change signal. This gear change signal is received by an antenna 14 provided on the toy car, and the drive time switch 16 of the DC general-purpose motor 10, which is capable of forward and reverse rotation, is operated by the signal, so that the general-purpose motor 10 maintains a constant forward rotation drive or reverse rotation drive. Time continues.

Therefore, for example, when a command for gear change operation to a high-speed gear is sent, the forward rotation drive switch of the time limit switch 16 of the general-purpose motor 10 is turned on, the general-purpose motor 10 starts, rotates forward for a certain period of time, and then starts driving. Rotation is transmitted from the gear 18 to the reduction gear 22, which rotates the worm gear 24 provided on the worm gear shaft 20 and operates the semicircular worm wheel 26. Semicircular worm wheel 26
When actuated, a force is exerted so that the protrusion 32 of the coupling crank 30 slides within the elongated hole 28 and moves away from the worm gear 24. When the above-mentioned force acts on the protrusion 32, the connecting crank 30 is pivoted to the gear change arm 36 at the fulcrum 34, so that the action provided on the lower surface of the end, which is the point of action of the connecting crank 30, is applied. Point protrusion 38 operates in a direction approaching worm gear 24 . However, the gear change arm 36 is installed so as to operate with substantially the same position as the fulcrum 34 of the connecting crank 30 as the fulcrum. Therefore, the action point protrusion 38 of the connecting crank 30 passes through an opening 40 that is expanded in the middle of the gear change arm 36, and connects to the change arm savers 42 and 44 attached to the lower surface of the gear change arm 36. It is held between the two. The change arm savers 42 and 44 are pivotally attached to the lower surface of the gear change arm 36 at a fulcrum 47 (see FIG. 3), and are elastically connected by a spring 43 at their tips.
For this reason, the application point protrusion 38 of the coupling crank 30
However, the change arm saver 44 is replaced by the worm gear 2.
By pressing in the direction 4, the side arm portion of the gear change arm 36 provided with the hole 46 also begins to move toward the worm gear 24 side. As a result, the side arm portion of the gear change arm 36 provided with the gripping portion 52 starts operating in a direction away from the worm gear 24 , so that the gripping portion 52 pushes the disc portion 50 in the direction of the high-speed secondary reduction gear 78 . As a result, shifter 4
8 continues to rotate, the hexagonal shaft 60 is slid in the direction of the high-speed secondary reduction gear 78, and the fitting convex portion 56 is removed from the coupling portion 80 of the low-speed secondary reduction gear 76, and the high-speed secondary It moves to a position where it abuts the coupling portion 82 of the reduction gear 78. At this time, the power supply circuit of the drive motor 62 is operated by a slide switch (not shown) interlocked with the gear change arm 36, and the fitting convex portion 56 of the shifter 48 is connected to the coupling portion of each secondary reduction gear 76, 78. Switch board 86 pole plates 90, 92, 94 are provided to close the power circuit of drive motor 62 and drive drive motor 62 only when fully engaged with switch board 80, 82. Further, when the shifter 48 is unfitted and is sliding on the hexagonal shaft portion 60, pole plates 96 and 98 are provided on the switch board 86 so that the power supply circuit of the drive motor 62 is short-circuited without going through the power supply 88. It will be done. For this reason,
When the shifter 48 is uncoupled and sliding on the hexagonal shaft part, the contacts 104, 10 of the slide switch
6 connects the pole plates 96 and 98, and the power supply circuit of the drive motor 62 is short-circuited without going through the power supply 88, and the drive motor 62 enters a braking state, meshing with the primary drive gears 70 and 72 and idling. The rotation of the primary reduction gears 76, 78 is reduced. In this way, the toy car with the drive motor 62 in the braking state continues to run due to inertia, so the rotation of the primary drive gear 84 is gradually reduced and the hexagonal shaft portion 60 of the secondary gear shaft 58 is rotated. The rotation of the attached shifter 48 is reduced, and the stopper 81 provided on the inner peripheral surface of the coupling portion 82 of the high-speed secondary reduction gear 78 in the braking state is synchronized with the wing portion 54 of the fitting convex portion 56 of the shifter 48. This makes it easier to fit and can be fitted quickly. At this time, the contacts 104 and 106 of the slide switch are separated from the plates 96 and 98, respectively, and the braking of the drive motor 62 is released, and at the same time, the contacts 100 and 102 come into contact with 92 and 94, closing the power supply circuit. Then, the driving of the drive motor 62 is restarted. Therefore, the secondary gear shaft 58 is
The shifter 48 connects to the high-speed secondary reduction gear 78 at the connecting portion 82
, the rotation of this high-speed secondary reduction gear 78 is transmitted to the axle 114 via the secondary drive gear 84, tertiary reduction gear 108, tertiary drive gear 110, and axle gear 112 ( (see Fig. 2), running wheels (not shown) mounted on this axle 114
Rotate.

Further, the general-purpose motor 10 is driven for a certain period of time when the time limit switch 16 is in the on state, and then stops when the time limit switch 16 is in the off state. For this reason, for example, the connecting portion 82 of the high-speed secondary reduction gear 78 and the shifter 4
If the fitting of the fitting convex portion 56 of No. 8 is difficult due to interference between the stopper 81 and the wing portion 54, stress is generated in the gear change arm 36 and the general-purpose motor 10 stops driving and the worm wheel 26 that operates the connecting crank 30 also reaches its operating limit. Therefore, in this embodiment, the gear change arm 36 is provided with change arm savers 42 and 44, and the stopper 81 is configured to temporarily store the pressing force by the action of the spring 43 that connects them.
The wing portion 54 interferes with the gear change arm 36.
Even when the engine is stopped, the action point protrusion 38 of the connecting crank 30 strongly presses the change arm saver 44 toward the worm gear 24, so the change arm saver 42 is set to not move toward the worm gear 24 by the stopper 45. The arm saver 42 can press a stopper 45 provided on the gear change arm 36 by the compression force of the spring 43 to operate the gear change arm 36 and complete the fitting.

In addition, a high-speed primary drive gear and a high-speed secondary reduction gear 7
8, it is constantly rotating at high speed due to the driving force of the drive motor 62, except during gear change operation.
When changing gears from low gear to high gear,
The moment the shifter 48, which is rotating at a low speed, is connected, a large load is applied, giving a large shock to the high-speed primary drive gear, and a large load is applied to the drive motor 62. If the rotation of the primary reduction gear 66 is transmitted to the primary reduction gear 66, the shock can be absorbed.

Furthermore, for a gear change operation from a high speed gear to a low speed gear, when a gear change command to a low speed gear is received by the antenna 14, the time limit switch 16 is activated.
The reverse drive switch 16 is turned on, and the general-purpose motor 10 is reversed, causing each actuating section to operate in the opposite direction to the gear change to a high-speed gear, thereby achieving a gear change with substantially the same operation as described above. be done.

〔Effect of the invention〕

As is clear from the embodiments described above, according to the present invention, a general-purpose motor is used to move a gear change arm positioned by the elasticity of a spring in two different directions, thereby eliminating the need for expensive servo motors. To obtain a gear change mechanism for a remotely controlled toy that has a simple configuration and excellent durability without using a motor. Further, according to the present invention, a switching mechanism can be attached that utilizes the operation of the gear change arm to brake the power supply circuit of the toy drive motor during a gear change operation, thereby controlling the gear change while the toy is running. This has the advantage of being extremely easy to implement.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the gear change mechanism according to the present invention, FIG. 2 is an enlarged perspective view of the essential parts of the transmission gear part of the gear change mechanism shown in FIG.
The figure is an enlarged explanatory view of a main part of the gear change arm portion of the gear change mechanism shown in FIG. 1. 10... General purpose motor, 12... Power supply, 14...
Antenna, 16... Time switch, 18... Drive gear, 20... Worm gear shaft, 22... Reduction gear, 24... Worm gear, 26... Worm wheel, 28... Long hole, 30... Connection crank,
32... Protrusion, 34... Fulcrum, 36... Gear change arm, 38... Point of action protrusion, 40...
Opening, 42...Change arm saver, 43...
...Spring, 44...Change arm saver,
45...stopper, 46...hole, 47...fulcrum,
48... Shifter, 50... Disc part, 52... Gripping part, 54... Wing part, 56... Fitting convex part, 58...
Secondary gear shaft, 60...hexagonal shaft part,
62...Toy drive motor, 64...Drive gear, 6
6...Primary reduction gear, 68...Primary gear shaft, 70...Low speed primary drive gear, 72...High speed 1
Next drive gear, 74... Coil spring, 76...
...Low speed secondary reduction gear, 78...High speed secondary reduction gear, 80...Connection part, 81...Stopper, 82...
...Connection part, 84...Secondary drive gear, 86...Slide switch board, 88...Power supply, 90, 92,
94, 96, 98... Pole plate, 100, 102, 1
04, 106...Contactor, 108...Third reduction gear, 110...Third drive gear, 112...Axle gear, 114...Axle, 116...Resistor.

Claims (1)

[Scope of Claims] 1. A general-purpose motor is connected to a gear change arm via a worm gear, a worm wheel, and a connecting crank, and a slide switch that is linked to the gear change arm is provided, and the toy drive motor is operated by operating the slide switch. A gear change mechanism for a remotely controlled toy, characterized in that the gear change mechanism is configured to control the rotational speed of a series of drive force transmission gear groups by controlling the gears. 2. A gear change mechanism for a remote control toy as set forth in claim 1, wherein the gear change mechanism for a remote control toy is configured to be energized by providing a time limit switch in the power supply circuit of the general-purpose motor. 3. A gear change mechanism for a remote control toy as set forth in claim 1, wherein a part of the slide switch is provided with a stop switch for a general-purpose motor. 4. The gear change mechanism for a remotely controlled toy as set forth in claim 1, wherein the gear change arm is provided with a change arm saver. 5. In the gear change mechanism for a remote-controlled toy according to claim 1, the high-speed primary drive gear in the series of drive force transmission gears is connected by a coil spring so as to follow the low-speed primary drive gear. Gear change mechanism for remote controlled toys.