JPH0429668Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is provided in a traveling toy such as a small car toy,
The present invention relates to an onomatopoeic sound generating device that generates onomatopoeic sounds such as a simulated engine sound according to the rotational speed of wheels, drive shafts, etc.

[Prior art]

A known device of this type is Utility Model Publication No. 55-49839, ``Sound generation mechanism for radio-controlled cars, etc.,'' which electronically generates an engine imitative sound according to the rotational speed of the driving wheels. However, this was installed in a radio-controlled car with a drive source, and no proposal has been made to install it in mini cars or the like that do not have a drive source. The reason for this is that it is difficult to electronically produce engine imitation sounds that are close to natural with a small configuration.

On the other hand, various proposals have been made for small running toys that do not have a driving source to produce simulated engine sounds mechanically using the sound of gears meshing or a sounding device such as a siren, but they do not produce the expected onomatopoeic sounds. This improvement is required.

[Purpose of invention]

In view of the above points, the present invention proposes a simple and highly reliable onomatopoeic sound generating device that can be used in small running toys that do not have a driving source, such as miniature cars, to produce more natural onomatopoeic sounds such as engine sounds using electronic sounds. It is to be.

[Structure of the idea]

The present invention provides a means for increasing the rotation speed of an input shaft in an onomatopoeic sound generating device that is used in a small traveling toy and generates an onomatopoeic sound such as a simulated engine sound that does not suddenly stop depending on the running speed. a flywheel that rotates via a speed means; a unidirectional rotation transmission means provided between the input shaft and the flywheel;
Rotation signal detection means having a contact piece with an arcuate cross section provided integrally with the flywheel, and a fixed contact piece in sliding contact with the contact piece, and outputting a voltage or frequency signal according to the rotation speed by the sliding contact; The present invention is characterized in that it includes an electronic sound generating means that generates sound in response to the output of the rotation signal detecting means.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

A rotating shaft 3 and shafts 4, 5, and 6 are supported by cases 1 and 2.

A screw gear 32 is fixed to the rotating shaft 3 with knurling or the like, and is rotatably supported by collars 31, 31 fitted on both sides, and this collar is connected to the regulating pieces 2b, 2.
It is positioned in the case at c.

Wheels (not shown) are fixed to both sides of the rotating shaft 3, and the case is incorporated into a small traveling toy.

The shaft 4 rotatably supports an integrated screw gear 41 and a large gear 42, and the shaft 5 supports an integrated small gear 5.
1. A large gear 52 is rotatably supported, and the shaft 6 has a
A rotating body 61 made of an insulator such as synthetic resin and having a gear 62 and a flywheel 63 fixed thereon is rotatably supported. And gears 32, 41, 4
2, 51, 52, and 62 are meshed with each other to constitute a rotation speed increasing means.

The shafts 3, 4, and 6 are supported by the case so as not to be displaceable, but the shaft 5 is supported by the circular arc holes 1a and 2a provided in the case.
When the gear 42 rotates clockwise in FIG. 1, the gear 42 engages as shown, and when it rotates counterclockwise, the shaft 5 is displaced upward by the rotational force, causing the gears 52 and 62 to engage. comes off and rotation transmission to the flywheel is cut off.

Also, the gear 42 may stop and the flywheel 63 rotates clockwise, or the gears 42 and 62 may rotate clockwise and the speed of the gear 62 increases the speed of the gear 42 and the speed increasing ratio of the gears 51 and 52. If the value is larger than the multiplied value, rotation transmission is also cut off in the same way as above.

That is, the gears 42, 51, 52 and the circular arc hole 1a,
2a constitutes a unidirectional rotation transmission means.

A metal sliding body 7 having two contact pieces 71 spaced apart by 90 degrees is fitted and fixed to the rotating body 61, and a presser foot 72 fitted above the metal sliding body 7 serves as a retainer and a spacer. As shown in FIG. 3, the contact piece 71 and the rotating body 61 are integrated so that their outer peripheries are on the same circumference, and the contact piece 8 fixed to the case 1 is in pressure contact with the contact piece 71 portion. There is. Therefore, the contact piece 8 comes into sliding contact alternately with the insulator and the conductor. The rotating body 61 having the sliding body 7 and the contact piece 8 constitute a switch of a rotation detection circuit 30, which will be described later. A washer 73 prevents the contact piece 8 from hitting the flywheel 63.

The above is the mechanical configuration.

On the other hand, the circuit configuration for sound generation includes a battery 10, a power switch 20, a control signal generation circuit 40 having a rotation detection circuit 30, an onomatopoeia generation circuit 50, and a speaker 6.
Consists of 0. The control signal generation circuit 40 is equipped with a VCO (voltage controlled oscillator), VCA (voltage controlled amplifier), etc., so that the amplitude and frequency of the output change according to changes in the voltage or frequency of the input signal. Try to emit a signal that is both strong and weak at the same time.

An onomatopoeic sound generating device is completed by integrating or connecting this circuit configuration and the mechanical configuration described above.

The operation is as follows: When the power switch 20 is closed and the rotating shaft 3 is rotated in the direction in which the one-way rotation transmitting means transmits rotation, the rotating body 61 rotates at high speed, and the rotating body 61,
A frequency signal twice the number of revolutions is input to the rotation detecting circuit 30 by the switch made up of the contact piece 8, and a voltage or a frequency signal corresponding to the number of revolutions is output. This signal is input to a control signal generation circuit 40, which outputs a signal for generating sound according to the rotation speed. This signal is input to the onomatopoeic sound generating circuit 50, and a pseudo engine sound is output from the speaker 60 with a pitch and strength corresponding to the speed of the rotating body 61.

The speed of the rotating body 61 is smoothed by the flywheel 63, and even if the rotating shaft 3 suddenly stops, the gears 52 and 62 are disengaged and the flywheel 63 gradually decelerates its rotation. Therefore, a simulated engine sound that is close to natural is produced.

Of course, if the power switch 20 is open, no sound will be produced.

Note that the control signal generation circuit 40 is connected to the rotation detection circuit 3.
By emitting a signal corresponding to the idling sound when there is no signal from 0, it is possible to generate an onomatopoeic sound that is even closer to the actual engine sound.
It is sufficient if the VCA outputs the lowest signal by closing the power switch 20.

Further, the speed increasing means and the one-way rotation transmission means are not limited to the above examples, but belt or roller transmission may be used, or a well-known clutch or ratchet mechanism may be used. By providing a signal detection means, the desired onomatopoeia can be obtained.

Further, the configuration of the sliding contact body 7 and the contact piece 8 may be replaced with various configurations that conduct intermittently through rotation.

It is also used not only in toy cars, but also in airplanes, ships, and various other toys; it can make running sounds in response to rotation, and it is also used in toys that have a driving source such as full-floating movement.

[Effect of idea]

With the above configuration, the present invention has a simple configuration and extracts the rotation signal from the flywheel that rotates most smoothly, so it is especially suitable for use in small traveling toys that do not have a drive source, such as mini cars. It can make onomatopoeic sounds such as natural simulated engine sounds, and it is highly reliable because it directly detects the signal mechanically.This onomatopoeic sound can only be made when rotating in one direction, such as forward rotation, making the toy more interesting. It is possible to provide an onomatopoeic sound generating device that exhibits excellent practical effects such as the onomatopoeic sound does not stop unnaturally even if the rotating shaft is suddenly stopped, and no strain is placed on the rotation transmission system.

[Brief explanation of the drawing]

FIG. 1 is a plan view excluding the case 2, FIG. 2 is a sectional view of each shaft portion, FIG. 3 is an explanatory diagram of the sliding body 7, and FIG. 4 is a circuit configuration diagram. 1, 2...Case, 1a, 2a...Circular hole, 3
... Rotating shaft, 32, 41 ... Screw gear, 42, 5
1, 52, 62... Gear, 63... Flywheel, 71, 8... Contact piece.

Claims (1)

[Scope of utility model registration request] A means for increasing the rotation speed of the input shaft, a flywheel rotating via the speed increasing means, and a one-way rotation transmission means provided between the input shaft and the flywheel;
Rotation signal detection means having a contact piece with an arcuate cross section provided integrally with the flywheel, and a fixed contact piece in sliding contact with the contact piece, and outputting a voltage or frequency signal according to the rotation speed by the sliding contact; An onomatopoeic sound generating device comprising: electronic sound generating means that generates sound upon receiving the output of the rotation signal detecting means.