CN219738360U

CN219738360U - Sound characteristic demonstration instrument

Info

Publication number: CN219738360U
Application number: CN202223195194.4U
Authority: CN
Inventors: 张俊
Original assignee: Fujian Educational Equipment Industry Association; Fujian Nanping Jianjin Middle School; Fujian Education Equipment And Infrastructure Center
Current assignee: Fujian Educational Equipment Industry Association; Fujian Nanping Jianjin Middle School; Fujian Education Equipment And Infrastructure Center
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-09-22
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a sound characteristic demonstration instrument which comprises a base, a loudspeaker and an index plate, wherein the index plate is fixedly connected above the base through a supporting rod, the loudspeaker is embedded on the base, a conduction module is fixedly arranged on the surface of the index plate, the input end of the conduction module is connected with a pushing rod, the other end of the pushing rod is fixedly arranged on a vibrating diaphragm of the loudspeaker, the output end of the conduction module is connected with a pointer, and the output end of the conduction module is positioned at the center of the index plate; the demonstration effect is more obvious, and the visualization of loudness and amplitude, tone and frequency is fully achieved.

Description

Sound characteristic demonstration instrument

Technical Field

The utility model relates to a sound characteristic demonstration instrument, and belongs to the technical field of teaching aids.

Background

Characteristics of sound: when introducing two characteristics of sound loudness and tone, a teacher can explain by combining a oscillogram of an oscilloscope, and the loudness is related to amplitude, and the larger the amplitude is, the larger the loudness is; the pitch is related to the degree of sparseness of the waveform, i.e., the frequency of vibration, the denser the waveform, the faster the frequency, the higher the pitch.

However, the oscilloscopes are quite unfamiliar for students, and students can feel confused by more conversion processes of the electronic signals; on the other hand, the oscilloscopes are not equipped in every school, so that popularization is difficult, and a teacher can also encounter difficulty in use.

Aiming at the above situation, the sound characteristic demonstrator with lower cost, obvious phenomenon, simple structure and convenient operation is designed to be used for classroom teaching, can be directly observed by eyes, and is very necessary for teaching.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a sound characteristic demonstrator which visualizes the loudness, amplitude, tone and frequency of sound and can strengthen the demonstration effect of the sound.

The technical scheme of the utility model is as follows:

the utility model provides a sound characteristic demonstration appearance, includes base, speaker and graduated disk, the graduated disk passes through bracing piece fixed connection in the base top, the speaker gomphosis is on the base, graduated disk surface fixed mounting has the conduction module, the input of conduction module is connected with the catch bar, the catch bar other end is fixed to be set up on the vibrating diaphragm of speaker, the output of conduction module is connected with the pointer, the output of conduction module is located graduated disk center department.

The transmission module comprises a rack, a pinion, a large gear and a fixed frame, wherein the fixed frame is fixedly arranged on the surface of the dividing plate, the pinion and the large gear are fixedly arranged inside the fixed frame, the rack penetrates through the fixed frame and is in sliding connection with the fixed frame, the bottom of the rack is connected with a pushing rod, the rack is meshed with the pinion, the pinion is meshed with the large gear, a gear shaft of the large gear is positioned at the center of the dividing plate, and the tail end of the pointer is connected with the gear shaft of the large gear.

The rack is provided with an anti-falling block on the outer side, and the anti-falling block is arranged on the fixed frame.

Wherein, the dividing plate is provided with a scale.

The utility model has the following beneficial effects:

through the design of the utility model, the structure is clear and convenient, and the swing amplitude of the pointer can be increased through the matching of the rack, the large gear and the small gear, so that the characteristic of sound can be observed more clearly; the amplitude and the frequency can be visually detected by observing the up-and-down swing of the pointer through the scale on the dividing disc.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

fig. 2 is an enlarged view of a portion of fig. 1 a in accordance with the present utility model.

The reference numerals in the drawings are as follows:

1. a base; 2. a speaker; 3. an index plate; 4. a push rod; 5. a pointer; 6. a rack; 7. a pinion gear; 8. a large gear; 9. a fixed frame; 11. a support rod; 21. a vibrating diaphragm; 61. and (5) preventing the block from falling off.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

Referring to fig. 1 and 2, the utility model provides a technical scheme:

the utility model provides a sound characteristic demonstration appearance, includes base 1, speaker 2 and graduated disk 3, and graduated disk 3 passes through bracing piece 11 fixed connection in base 1 top, and speaker 2 gomphosis is on base 1, and graduated disk 3 surface fixed mounting has conduction module, and conduction module's input is connected with catch bar 4, and the catch bar 4 other end is fixed to be set up on speaker 2's vibrating diaphragm 21, and conduction module's output is connected with pointer 5, and conduction module's output is located graduated disk 3 center department.

Further, the conduction module comprises a rack 6, a pinion 7, a large gear 8 and a fixed frame 9, wherein the fixed frame 9 is fixedly arranged on the surface of the index plate 3, the pinion 7 and the large gear 8 are fixedly arranged inside the fixed frame 9, the rack 6 penetrates through the fixed frame 9 and is in sliding connection with the fixed frame 9, the bottom of the rack 6 is fixedly connected with a pushing rod 4, the rack 6 is meshed with the pinion 7, the pinion 7 is meshed with the large gear 8, a gear shaft of the large gear 8 is positioned at the center of the index plate 3, and the tail end of the pointer 5 is connected to the gear shaft of the large gear 8.

Specifically, through the up-and-down displacement of the rack 6, the meshed pinion 7 is driven to rotate, so that the large gear 8 meshed with the pinion 7 is driven to rotate, the pointer 5 is driven to rotate, the tail end of the pointer 5 is connected to the gear shaft of the large gear 8, the gear shaft of the large gear 8 is arranged at the center of the index plate 3, and the rotating accuracy of the pointer 5 is ensured; the pinion 7 and the bull gear 8 are fixedly arranged inside the fixed frame 9 through a gear shaft.

Further, an anti-falling block 61 is arranged on the outer side of the rack 6, and the anti-falling block 61 is arranged on the fixed frame 9; specifically, the top of the anti-drop block 61 is fixed on the lower wall of the fixed frame 9, two anti-drop blocks 61 are arranged, and two anti-drop blocks 61 are oppositely attached to the outer side of the rack 6, so that stability of the rack 6 during vertical sliding is guaranteed.

Further, the dividing disc 3 is provided with scales; the analysis can be performed more accurately through the scales, specifically, the scales of the two horizontal end points on the index plate 3 are all 0, the scales of the two vertical end points are all 90, and 10 scale marks are arranged on the scales from 0 to 90 by taking 10 as a limit.

Working principle example:

before demonstration starts, firstly, the height is adjusted to enable the pointer 5 to horizontally point on a zero scale mark, then the loudspeaker 2 is started, the loudspeaker 2 can directly adopt a loudspeaker, the loudspeaker 2 drives the vibrating diaphragm 21 to vibrate, the vibrating diaphragm 21 drives the push rod 4 to slide up and down, the anti-drop block 61 can help the push rod 4 to keep stable in the sliding process, the rack 6 is driven by the push rod 4 to shift up and down, then the pinion 7 and the large gear 8 are driven to rotate, the pointer 5 synchronously rotates under the action of the large gear 8, the up and down vibration points to scales on different dividing plates 3, students can swing through the pointer 5, and the magnitude and the frequency of the amplitude can be measured by observing the scales of the dividing plates 3.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A sound characteristic demonstration instrument is characterized in that: including base (1), speaker (2) and graduated disk (3), graduated disk (3) pass through bracing piece (11) fixed connection in base (1) top, speaker (2) gomphosis is on base (1), graduated disk (3) fixed surface installs conduction module, conduction module's input is connected with catch bar (4), the catch bar (4) other end is fixed to be set up on vibrating diaphragm (21) of speaker (2), conduction module's output is connected with pointer (5), conduction module's output is located graduated disk (3) center department.

2. A sound characteristic demonstrator as claimed in claim 1, wherein: the conduction module comprises a rack (6), a pinion (7), a large gear (8) and a fixed frame (9), wherein the fixed frame (9) is fixedly arranged on the surface of the dividing disc (3), the pinion (7) and the large gear (8) are fixedly arranged inside the fixed frame (9), the rack (6) penetrates through the fixed frame (9) and is in sliding connection with the fixed frame (9), the bottom of the rack (6) is fixedly connected with a push rod (4), the rack (6) is meshed with the pinion (7), the pinion (7) is meshed with the large gear (8), a gear shaft of the large gear (8) is positioned at the center of the dividing disc (3), and the tail end of the pointer (5) is connected with the gear shaft of the large gear (8).

3. A sound characteristic demonstrator as claimed in claim 2, wherein: the outside of the rack (6) is provided with an anti-falling block (61), and the anti-falling block (61) is arranged on the fixed frame (9).

4. A sound characteristic demonstrator as claimed in claim 1, wherein: the dividing disc (3) is provided with scales.