CN209765847U - Interesting visible sound experimental device - Google Patents

Abstract

The utility model relates to a teaching instrument, in particular to an interesting and visible sound experimental device; the problem that the existing instrument cannot visually display the scientific principle of sound generation is solved; the card inserting sound box is connected with a loudspeaker, and the transformer is connected with a bidirectional speed reduction driving motor; the center of the loudspeaker is provided with a small laser flashlight transmission rod, and the outer end of the small laser flashlight transmission rod is fixed with a small laser flashlight; a carbon pen and a fixed part assembly thereof are arranged below the small laser flashlight; a small bidirectional rotation speed reduction motor is arranged at the top end of the bracket; the movable plane mirror reflects the light beam of the small laser flashlight to the screen; a carbon refill and a fixing component thereof are arranged below the small laser flashlight, and when the loudspeaker vibrates to produce sound, the carbon refill draws a sound wave curve on a paper strip moving below the carbon refill; the movement of the paper strips is realized by driving a first paper strip winding wheel by a bidirectional speed reduction driving motor and driving a second paper strip winding wheel by the paper strips; two sides of the carbon pen core are respectively provided with a pressing wheel.

Description

Interesting visible sound experimental device

Technical Field

The utility model relates to a teaching instrument specifically is an interesting sound experimental apparatus who sees.

Background

The sound is generated by object vibration, which is basic knowledge learned by physics in junior middle schools and science courses in primary schools, but no instrument capable of vividly and intuitively displaying the scientific principle exists in the existing instrument.

Disclosure of Invention

The principles of education and psychology tell us that the thinking of children is mainly direct image thinking; in order to make students obtain perceptual knowledge first when learning the scientific principle of sound production and then promote the perceptual knowledge, provide a novel teaching instrument; in particular to an interesting and visible sound experimental device.

The utility model discloses a realize for following technical scheme: an interesting and visible sound experimental device comprises a base, wherein a card insertion sound box and a transformer are arranged in the base; the card-inserting sound box is connected with the loudspeaker circuit, and the transformer is connected with the second bidirectional speed-reducing drive motor circuit; the loudspeaker is fixed behind the loudspeaker fixing bracket (17); the center of the loudspeaker is provided with a small laser flashlight transmission rod, and the outer end of the small laser flashlight transmission rod is fixed with a small laser flashlight; a carbon pen and a fixing part thereof are arranged below the small laser flashlight; the fixing part consists of a small laser flashlight switch, a small flashlight switch pressing sheet, a carbon refill fixing bolt and a carbon refill; the top end of the loudspeaker fixing support is provided with a first bidirectional rotating speed reduction small motor and an attached transmission device, and the first bidirectional rotating speed reduction small motor and the attached transmission device can use a driving motor and a ready-made transmission device in an oscillating electric fan; the first small bidirectional rotating speed reduction motor drives the device to swing on a movable plane mirror at the top end of the loudspeaker fixing support, and light beams of the small laser flashlight are reflected to the screen to draw a sound wave curve; the distance from the instrument to the screen plays a role in amplifying the sound wave image, and the visual persistence function of human eyes enables the sound wave curve image to be a continuous vivid interesting image; when the loudspeaker vibrates to produce sound, the carbon refill draws a sound wave curve on a paper strip moving below the carbon refill; the movement of the paper strips is realized by driving a first paper strip winding wheel by a second bidirectional speed reduction driving motor and driving a second paper strip winding wheel by the paper strips; in order to ensure the paper strips to move smoothly, two pressing wheels are respectively arranged on two sides of the carbon refill; the plug-in card sound box and the transformer are respectively connected with a power supply through wires; the power socket is attached with a 2-way power switch.

Drawings

Fig. 1 is a front plan view of the present invention.

In the figure: 1. a base; 2. a pinch roller; 3. inserting a card sound box; 4. a paper strip; 5. a second paper roll; 6. a speaker; 7. a laser small flashlight light column; 8. a small bidirectional rotation speed reduction motor; 9. a plane mirror; 10. a small laser torch; 11. a first paper roll; 12. a bi-directional reduction drive motor; 13. a transformer; 14. a carbon cartridge and a fixing part assembly thereof; 15. a power switch; 16. a laser small flashlight transmission rod; 17 a speaker fixing bracket; 18. a power outlet.

Fig. 2 is a circuit diagram of the present invention.

In the figure: 3. a charging type plug-in card sound box; 8. a small bidirectional rotation speed reduction motor 1-driving plane mirror; 12 two-way rotation speed reduction small motor 2-driving paper winding wheel; 13. a transformer; 18. a power outlet; 20. 2-way power switch.

Fig. 3 is a structural diagram of a carbon pen core and a fixing part assembly thereof.

In the figure: 10. a small laser torch; 16. a laser small flashlight transmission rod; 21. a small flashlight switch; 22. a carbon pen fixing bolt; 23. a carbon refill; 24 small flashlight switch pressing sheets.

Detailed Description

An interesting and visible sound experimental device is characterized by comprising a base 1, wherein a card insertion sound 3 and a transformer 13 are arranged in the base 1, the card insertion sound 3 is connected with a loudspeaker 6 through a circuit, and the transformer 13 is connected with a second bidirectional deceleration driving motor 12 through a circuit; the loudspeaker 6 is fixed behind the loudspeaker fixing bracket 17; the center of the loudspeaker 6 is provided with a small laser flashlight transmission rod 16, and the outer end of the small laser flashlight 10 is fixed; a carbon pen and a fixing part 14 thereof are arranged below the small laser flashlight 10; the fixing part 14 consists of a small laser flashlight switch 21, a small flashlight switch pressing sheet 24, a carbon pen refill fixing bolt 22 and a carbon pen refill 23; a first bidirectional rotation speed reduction small motor 8 and an attached transmission device are arranged at the top end of the loudspeaker fixing support, and a driving motor and a ready-made transmission device in the oscillating electric fan can be used; the first bidirectional rotating speed-reducing small motor 8 drives the device to swing on a movable plane mirror 9 at the top end of a loudspeaker fixing support 17, and light beams of the laser small flashlight 10 are reflected to a screen to draw a sound wave curve; the distance from the instrument to the screen plays a role in amplifying the sound wave image, and the visual persistence function of human eyes ensures that the sound wave curve image is continuous, vivid and interesting; when the loudspeaker 6 vibrates to produce sound, the carbon refill 23 draws a sound wave curve on a paper strip moving below the carbon refill; the movement of the paper slip is realized by driving a first paper slip winding wheel 11 by a second bidirectional speed reduction driving motor 12 and driving a second paper slip winding wheel 5 by the paper slip; in order to ensure the paper strips to move smoothly, two pressing wheels 2 are respectively arranged on two sides of the carbon refill; the plug-in card sound box and the transformer are respectively connected with a power supply through wires; the power socket is attached with a 2-way power switch.

The experimental procedure is as follows.

1, inlay bright little flashlight of laser, open the switch of plug-in card stereo set, let plug-in card stereo set broadcast music, at this moment the speaker will vibrate, drive little flashlight of laser vibration at the little flashlight transfer line of laser at the speaker center through the device, the light column directive of little flashlight of laser activity level crossing, then on the screen of reflection, red point will demonstrate very interesting frequency image along with the music frequency on the screen.

2. The carbon refill is adjusted to lightly contact with the paper strips below, a switch of the small motor is driven to be turned on, the small motor drives the paper strips to move at a constant speed, and the vibrating carbon refill can draw sound wave curves with different frequencies on the paper strips.

Claims (1)

1. An interesting and visible sound experimental device is characterized by comprising a base (1), wherein a card insertion sound box (3) and a transformer (13) are arranged in the base (1), the card insertion sound box (3) is connected with a loudspeaker (6) through a circuit, and the transformer (13) is connected with a second bidirectional speed reduction driving motor (12) through a circuit; a loudspeaker (6) is fixed behind the loudspeaker fixing bracket (17); a small laser flashlight transmission rod (16) is arranged at the center of the loudspeaker (6), and a small laser flashlight (10) is fixed at the outer end of the small laser flashlight transmission rod; a carbon pen and a fixing part (14) thereof are arranged below the small laser flashlight (10); the fixing part (14) consists of a small laser flashlight switch (21), a small flashlight switch pressing sheet (24), a carbon pen refill fixing bolt (22) and a carbon pen refill (23); a first bidirectional rotating speed reduction small motor (8) and an attached transmission device are arranged at the top end of the loudspeaker fixing support (17), and a driving motor and an existing transmission device in an oscillating electric fan can be used; the first small bidirectional rotating speed reduction motor (8) drives the device to swing on a movable plane mirror (9) at the top end of a loudspeaker fixing support (17), and light beams of the small laser flashlight (10) are reflected to the screen to draw a sound wave curve; the distance from the instrument to the screen plays a role in amplifying the sound wave image; the visual persistence function of human eyes enables the acoustic wave curve to become a vivid and interesting continuous image; when the loudspeaker (6) vibrates to produce sound, the carbon refill (23) draws a sound wave curve on a paper strip moving below the carbon refill; the movement of the paper strips is realized by driving a first paper strip winding wheel (11) by a second bidirectional speed reduction driving motor (12) and driving a second paper strip winding wheel (5) by the paper strips; in order to ensure the paper strips to move smoothly, two pressing wheels (2) are respectively arranged on two sides of the carbon refill; the plug-in card sound box and the transformer are respectively connected with a power supply through wires; the power socket is attached with a 2-way power switch.