Acoustic filter and speaker device

Abstract

This utility model discloses an acoustic filter and a speaker device, including a filter housing, a speaker body, and a temperature control mechanism and a filtering mechanism, both installed inside the filter housing. A piezoelectric substrate is installed in the middle of the inner wall of the filter housing, located inside the first vacuum chamber. Multiple heating wires are evenly installed on the top of the arc-shaped base plate. A terminal post is interlaced between the bottom of the arc-shaped base plate and the inner wall of the filter housing. A temperature sensor is installed on one side of the outer wall of the filter housing. In this utility model, sound waves are filtered by the filtering mechanism inside the filter housing before being transmitted to the speaker. The temperature control mechanism in the filter housing senses the low temperature of the external environment through the temperature sensor, which triggers the heating wires to regulate the low temperature inside the filter housing, keeping it at a constant temperature and reducing the impact on sound wave transmission. This solves the problem that the large temperature difference between the inside and outside of the filter affects the sound wave filtering effect in actual use.

Description

Technical Field

[0001] This utility model relates to the technical field of acoustic filtering, specifically to an acoustic filter and a speaker device. Background Technology

[0002] An acoustic filter is a device used to process sound signals. It achieves different sound effects and audio effects by changing the frequency characteristics of the sound signals. During the use of loudspeakers, acoustic filters are usually installed to improve the audio quality of the loudspeakers and filter out the noise generated. With the development of modern technology, the function and structure of filters are constantly being improved, resulting in better and better sound quality of loudspeakers.

[0003] In response to this, CN214315545U proposes an acoustic filter and a speaker device. The acoustic filter is connected together by a combination of a sound wave guide bracket, sound-absorbing cotton and an acoustic labyrinth. It can eliminate noise generated behind the diaphragm and avoid diaphragm deformation caused by air resonance motion behind the diaphragm, without losing sound quality and making the sound more accurate.

[0004] However, loudspeakers are generally exposed to the external environment during use. They contain various precision sound wave transmission components. External hot and cold air currents can cause different sound wave transmission effects of the internal components, resulting in a decrease in the sound quality transmitted by the loudspeaker. Ordinary filters do not have the function of automatically regulating their internal temperature during use. Even with multiple filters, sound wave disturbances can still occur due to temperature differences, resulting in noise. In response to this, this design proposes an acoustic filter and loudspeaker device. Utility Model Content

[0005] The purpose of this invention is to provide an acoustic filter and a loudspeaker to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model proposes an acoustic filter and a loudspeaker device, including a filter housing, a loudspeaker body, and a constant temperature mechanism and a filtering mechanism, both installed inside the filter housing, with the loudspeaker body installed at the front end of the filter housing.

[0007] The constant temperature mechanism includes a first vacuum groove formed at the edge of the inner wall of the filter housing. A piezoelectric substrate is installed in the middle of the inner wall of the filter housing inside the first vacuum groove. An arc-shaped base plate is installed at the bottom of the piezoelectric substrate on the inner wall of the filter housing. Multiple heating wires are installed at equal intervals on the top of the arc-shaped base plate. A grounding post is inserted between the bottom of the arc-shaped base plate and the inner wall of the filter housing. A temperature sensor is installed on one side of the outer wall of the filter housing, and the temperature sensor is electrically connected to each heating wire through the grounding post.

[0008] In one example, the filtering mechanism includes interdigital transducers mounted on both sides of the top of the piezoelectric substrate, with an acoustic wave conduction tube interlaced between the two interdigital transducers, and one end of the acoustic wave conduction tube interlaced with the inner wall of the speaker body.

[0009] In one example, a filter bracket is inserted into the inner wall of the acoustic wave conduction tube, and multiple contact shafts are fixed at equal intervals on the outer wall of the filter bracket.

[0010] In one example, one end of each of the contact shafts is fixedly connected to the inner wall of the sound wave conduction tube, the inner wall of which is filled with sound-absorbing cotton.

[0011] In one example, a diaphragm is installed on one side of the inner wall of the speaker body, and a second vacuum groove is formed at the edge of the inner wall of the speaker body, with the inner wall of the second vacuum groove filled with sound insulation cotton.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a constant temperature mechanism, the sound waves are filtered through the filter mechanism inside the filter housing before being transmitted to the speaker. The constant temperature mechanism is set in the filter housing, and the temperature sensor senses the low temperature of the external environment and triggers the heating wire to regulate the low temperature inside the filter housing, so that the internal temperature is kept constant, reducing the impact on the transmission of sound waves, improving the sound quality, and solving the problem that the temperature difference between the inside and outside of the filter is too large in actual use, which affects the sound wave filtering effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the filter housing of this utility model;

[0015] Figure 3 This is a schematic diagram of the filter mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the speaker body of this utility model.

[0017] In the diagram: 1. Filter housing; 2. Speaker body; 3. Temperature control mechanism; 301. First vacuum chamber; 302. Piezoelectric substrate; 303. Arc-shaped base plate; 304. Heating wire; 305. Temperature sensor; 4. Filtering mechanism; 401. Interdigital transducer; 402. Sound wave conduction tube; 403. Filter bracket; 404. Contact shaft; 405. Sound-absorbing cotton; 5. Diaphragm; 6. Second vacuum chamber; 7. Sound insulation cotton. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: an acoustic filter and a loudspeaker device, including a filter housing 1, a loudspeaker body 2, and a constant temperature mechanism 3 and a filtering mechanism 4, both installed inside the filter housing 1, and the loudspeaker body 2 is installed at the front end of the filter housing 1.

[0020] The constant temperature mechanism 3 includes a first vacuum groove 301 formed at the edge of the inner wall of the filter housing 1. A piezoelectric substrate 302 is installed in the middle of the inner side of the first vacuum groove 301 on the inner wall of the filter housing 1. An arc-shaped base plate 303 is installed at the bottom of the piezoelectric substrate 302 on the inner wall of the filter housing 1. A plurality of heating wires 304 are installed at equal intervals on the top of the arc-shaped base plate 303. A terminal post is inserted between the bottom of the arc-shaped base plate 303 and the inner wall of the filter housing 1. A temperature sensor 305 is installed on one side of the outer wall of the filter housing 1, and the temperature sensor 305 is electrically connected to each heating wire 304 through the terminal post.

[0021] In use, the sound waves are filtered by the filter and then transmitted through the speaker body 2. During this process, the sound waves enter the interior of the filter housing 1 and are filtered and optimized by the filter mechanism 4. At the same time, the temperature sensor 305 on the outer wall of the filter housing 1 senses the temperature of the external environment. If the temperature is lower than the set temperature, the battery built into the temperature sensor 305 will be energized through the terminal and the heating wire 304, thereby generating heat and heating the internal area of ​​the filter housing 1. This ensures that the structural components on the filter mechanism 4 can maintain a constant temperature, preventing the temperature from being too low and affecting the transmission effect of the sound waves. Furthermore, a first vacuum groove 301 is provided at the edge of the inner wall of the filter housing 1 to effectively prevent internal heat loss and improve the constant temperature effect inside the filter housing 1. The heat generated by the heating wire 304 is within the temperature control protection range of each component structure, and will not cause the internal components to overheat and be damaged. When the external temperature is higher than the set temperature, the temperature sensor 305 will not be triggered, so that the heating wire 304 will not generate heat. This solves the problem that the large temperature difference between the inside and outside of the filter affects the sound wave filtering effect in actual use.

[0022] Furthermore, the filtering mechanism 4 includes interdigital transducers 401 mounted on both sides of the top of the piezoelectric substrate 302. A sound wave conduction tube 402 is interlaced between the two interdigital transducers 401, and one end of the sound wave conduction tube 402 is interlaced with the inner wall of the speaker body 2. After the sound wave enters the interior of the filter housing 1, it is converted into an electrical signal by one interdigital transducer 401, and then transmitted by the sound wave conduction tube 402 to the other interdigital transducer 401 to be converted back into a sound wave. The function of the piezoelectric substrate 302 is to prevent disorder during the transmission of electrical signals, thereby preventing noise.

[0023] A filter bracket 403 is inserted and connected to the inner wall of the sound wave conduction tube 402. Multiple contact shafts 404 are fixed at equal intervals on the outer wall of the filter bracket 403. When the electrical signal between the two interdigital transducers 401 is transmitted, it is transmitted through the sound wave conduction tube 402 and the noise is absorbed by the sound-absorbing cotton 405 in this section before being transmitted, which effectively improves the sound effect.

[0024] Furthermore, one end of each contact shaft 404 is fixedly connected to the inner wall of the sound wave conduction tube 402. The inner wall of the sound wave conduction tube 402 is filled with sound-absorbing cotton 405. After the sound wave is converted and transmitted by the two interdigital transducers 401, it continues to be transmitted to the sound wave conduction tube 402 through the contact shaft 404. Then, the sound-absorbing cotton 405 at the rear end absorbs the noise again and transmits it to the speaker body 2 for playback, making the sound effect better and the noise level lower.

[0025] Furthermore, a diaphragm 5 is installed on one side of the inner wall of the speaker body 2, and a second vacuum groove 6 is opened at the edge of the inner wall of the speaker body 2. The inner wall of the second vacuum groove 6 is filled with sound insulation cotton 7. The sound waves are transmitted to the inside of the speaker body 2 and vibrate through the diaphragm 5 to produce sound. During this process, since the second vacuum groove 6 is opened on the inner wall of the speaker body 2 and the inner wall of the second vacuum groove 6 is filled with sound insulation cotton 7, the sound effect is effectively prevented from escaping outside the diaphragm 5 inside the speaker body 2, thereby improving the audio effect in the area of ​​the diaphragm 5 and blocking noise interference from the external environment.

[0026] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0027] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An acoustic filter and a loudspeaker device, comprising a filter housing (1), a loudspeaker body (2), and a constant temperature mechanism (3) and a filtering mechanism (4) both installed inside the filter housing (1), wherein the loudspeaker body (2) is installed at the front end of the filter housing (1); characterized in that The constant temperature mechanism (3) includes a first vacuum groove (301) opened at the edge of the inner wall of the filter housing (1). A piezoelectric substrate (302) is installed in the middle position inside the first vacuum groove (301) on the inner wall of the filter housing (1). An arc-shaped base plate (303) is installed at the bottom of the piezoelectric substrate (302) on the inner wall of the filter housing (1). A plurality of heating wires (304) are installed at equal intervals on the top of the arc-shaped base plate (303). A grounding post is inserted between the bottom of the arc-shaped base plate (303) and the inner wall of the filter housing (1). A temperature sensor (305) is installed on one side of the outer wall of the filter housing (1), and the temperature sensor (305) is electrically connected to each heating wire (304) through the grounding post.

2. The acoustic filter and speaker device of claim 1, wherein: The filtering mechanism (4) includes interdigital transducers (401) installed on both sides of the top of the piezoelectric substrate (302), and a sound wave conduction tube (402) is interlaced between the two interdigital transducers (401), and one end of the sound wave conduction tube (402) is interlaced with the inner wall of the speaker body (2).

3. The acoustic filter and speaker device of claim 2, wherein: The inner wall of the sound wave conduction tube (402) is connected to a filter bracket (403), and the outer wall of the filter bracket (403) is provided with multiple contact shafts (404) at equal intervals.

4. The acoustic filter and speaker device of claim 3, wherein: One end of each of the contact shafts (404) is fixedly connected to the inner wall of the sound wave conduction tube (402), and the inner wall of the sound wave conduction tube (402) is filled with sound-absorbing cotton (405).

5. The acoustic filter and speaker device of claim 1, wherein: A diaphragm (5) is installed on one side of the inner wall of the speaker body (2), and a second vacuum groove (6) is provided at the edge of the inner wall of the speaker body (2), and the inner wall of the second vacuum groove (6) is filled with sound insulation cotton (7).

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