WO2021103071A1 - Speaker and audio apparatus - Google Patents

Abstract

Provided are a speaker and an audio apparatus. The speaker comprises a basket, a rear cover, a sound film, a sound-absorbing member, a vibration system and a magnetic circuit system. The vibration system comprises a diaphragm. The magnetic circuit system comprises a yoke. An inner cavity is bounded by the diaphragm, the yoke and the basket. The rear cover is positioned at one side of the yoke away from the diaphragm, and a rear cavity is bounded by the rear cover and the yoke. The rear cavity is in communication with the inner cavity. The rear cover is provided with a first through hole. The sound film is fixed to the rear cover and seals the first through hole. The sound-absorbing member is provided inside the rear cavity. Vibration of the diaphragm compresses air in the inner cavity and, consequently, influences flowing of air in the rear cavity. A change in the air in the rear cavity causes vibration of the sound film, such that the volume of the rear cavity is increased, thereby reducing F0, enhancing low frequency sensitivity of the speaker, and effectively reducing power consumption. Compared with the prior art, provision of a sound-absorbing material lengthens the path of propagation of a sound signal to the rear cavity, thereby optimizing low frequency sensitivity and reducing power consumption. The audio apparatus using the speaker possesses the advantages of the speaker.

Description

Speakers and audio equipment Technical field

This application relates to the field of electro-acoustic conversion technology, and in particular to a speaker and audio equipment.

Background technique

The speaker is a commonly used electronic component, mainly used for the playback of audio signals. Its working principle is that a voice coil is built in a magnetic circuit composed of magnets. The current flowing through the voice coil generates a driving force in the up and down directions to make vibrations. The membrane vibrates thereby causing the air to vibrate to produce sound.

With the advancement of science and technology, the popularity of electronic devices with audio functions (hereinafter referred to as audio devices) is getting higher and higher, especially with the advent of the 4G and 5G era, people’s requirements for the performance of audio device speakers are also increasing. high.

technical problem

However, the existing speakers still have the problems of low low frequency sensitivity and high power consumption, which cannot meet the user's requirements for speaker performance and cost.

Therefore, it is necessary to provide a new speaker to solve the above technical problems.

Technical solutions

The purpose of this application is to provide a loudspeaker to solve the current technical problems of low frequency sensitivity and high power consumption of the loudspeaker.

The technical solution of this application is as follows:

A loudspeaker is provided, the loudspeaker includes a basin frame with a receiving space, and a vibration system and a magnetic circuit system housed in the receiving space, the vibration system including a vibration system fixed to the basin frame and used for vibrating and sounding. A membrane, the magnetic circuit system includes a magnetic bowl fixed to the basin frame;

The magnetic bowl, the diaphragm, and the basin frame are enclosed to form an inner cavity, and the speaker further includes a rear cavity located on a side of the magnetic bowl away from the diaphragm and enclosed with the magnetic bowl The rear cover, the rear cavity is connected to the inner cavity;

The back cover is provided with a first through hole, and the speaker further includes a sound film fixed to the back cover and covering the first through hole;

The loudspeaker further includes a sound absorbing member, and the sound absorbing member is arranged in the rear cavity.

As an improvement, the sound-absorbing member is connected to the sound membrane.

As an improvement, the magnetic circuit system further includes a magnet unit fixed to the magnetic bowl, the magnet unit is provided with a second through hole penetrating therethrough in the direction of vibration, and the magnetic bowl is provided with the second through hole. A third through hole communicating with the two through holes, the second through hole and the third through hole penetrate the inner cavity and the rear cavity.

As an improvement, the speaker further includes a gas-permeable diaphragm fixed to the magnetic circuit system, and the gas-permeable diaphragm cover seals at least one of the second through hole and the third through hole.

As an improvement, the first through hole, the second through hole, and the third through hole are arranged opposite to each other along the vibration direction of the diaphragm.

As an improvement, the vibration system further includes a voice coil that drives the diaphragm to vibrate and produce sound, and the magnet unit includes a first magnet part provided with the second through hole, and is arranged around the first magnet part The second magnet part, a magnetic gap is left between the first magnet part and the second magnet part, and the voice coil is inserted into the magnetic gap and surrounds the first magnet part.

As an improvement, the vibrating membrane includes a dome in the middle position and a folding ring fixedly connected to the dome, and the folding ring is connected to the basin frame.

As an improvement, the sound film includes a flat plate part located at an intermediate position and a bent part connected to the flat plate part.

As an improvement, a leak hole is provided on the rear cover, and the leak hole communicates with the rear cavity and the external space.

As an improvement, the sound-absorbing member is fixed to the flat plate portion.

The present application also provides an audio device, which includes the aforementioned speaker.

Beneficial effect

The beneficial effects of the speaker provided by the present application are: since the inner cavity is connected to the rear cavity, the vibration of the diaphragm causes the compression of the air in the inner cavity to affect the air flow in the rear cavity; the change of the air in the rear cavity will cause the vibration of the sound diaphragm. Thereby increasing the volume of the rear cavity, reducing F0, that is, the lowest resonant frequency, thereby improving the low-frequency sensitivity of the speaker and effectively reducing power consumption. Due to the addition of the sound-absorbing member, the propagation path of the sound signal entering the rear cavity is lengthened, and the sound absorption rate is high, thereby further improving the low-frequency sensitivity of the speaker and reducing the power consumption.

The audio device provided by the present application has all the beneficial effects of the speaker due to the use of the above-mentioned speaker, and will not be repeated here.

Description of the drawings

FIG. 1 is a schematic diagram 1 of the structure of the loudspeaker provided by this application;

Figure 2 is a second structural diagram of the loudspeaker provided by this application;

FIG. 3 is a schematic diagram of the top view structure of the speaker provided by this application;

Figure 4 is a schematic diagram of the A-A cross-sectional structure in Figure 3;

Figure 5 is the first schematic diagram of the explosive structure of the loudspeaker provided by this application;

Fig. 6 is the second schematic diagram of the exploded structure of the loudspeaker provided by this application.

Embodiments of the present invention

It should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "Bottom", "Inner", "Outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying what is referred to The device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

The application will be further described below in conjunction with the drawings and implementations.

Please refer to FIG. 1 to FIG. 6. The present application discloses a speaker 10, which includes a basin frame 100, a vibration system 200, a magnetic circuit system 300, a back cover 400, a sound film 500 and a sound absorbing member 600. Wherein, the basin frame 100 has a containing space 110, the vibration system 200 and the magnetic circuit system 300 are both contained in the containing space 110, and the magnetic circuit system 300 drives the vibration system 200 to vibrate and produce sound.

Specifically, the vibration system 200 includes a diaphragm 210 and a voice coil 220. The diaphragm 210 is fixed on the basin frame 100 and used for vibrating and sounding. The magnetic circuit system 300 includes a magnet unit 320 and a magnetic bowl 310. The magnetic bowl 310 is fixed on the basin frame 100. In this embodiment, the diaphragm 210, the magnetic bowl 310 and the basin frame 100 are enclosed to form an inner cavity 11. The rear cover 400 is connected to the basin frame 100 and is located on the side of the magnetic bowl 310 away from the diaphragm 210. The cover 400 and the magnetic bowl 310 are enclosed to form a back cavity 12, and the inner cavity 11 and the back cavity 12 are in communication with each other; in addition, a first through hole 410 is opened on the back cover 400, and the first through hole 410 communicates with the back cavity 12 and In the external space, the sound film 500 is connected to the back cover 400 and covers the first through hole 410. Preferably, the sound film 500 is an elastic member.

In addition, the sound absorbing member 600 is disposed in the rear cavity 12. Specifically, in this embodiment, the sound absorbing member 600 includes a gas-permeable packaging component and a sound-absorbing material arranged in the gas-permeable packaging component. The sound-absorbing material is preferably a sound-absorbing powder.

In this way, since the inner cavity 11 and the back cavity 12 are connected, the vibration of the diaphragm 210 enables the compression of the air in the inner cavity 11 to drive the air flow in the back cavity 12, and the change of the air in the back cavity 12 will cause the sound diaphragm 500 to vibrate, thereby increasing The large volume of the rear cavity 12 reduces the FO (lowest resonant frequency), thereby improving the low frequency sensitivity of the speaker 10 and effectively reducing power consumption. In addition, due to the addition of sound-absorbing materials, the propagation path of the sound signal entering the rear cavity 12 is lengthened, and the sound absorption rate is high, thereby further improving the low-frequency sensitivity of the speaker 10 and reducing power consumption. In one of the embodiments of the present application, a gap is left between the periphery of the magnetic bowl 310 and the basin frame 100, and the inner cavity 11 can communicate with the rear cavity 12 through the gap between the magnetic bowl 310 and the basin frame 100.

Preferably, the sound film 500 and the rear cover 400 are glued and connected.

In one embodiment, the sound film 500 is in the shape of a flat plate. In this way, the difficulty of processing and assembly is low, which helps to save costs.

In another embodiment, the sound-absorbing member 600 is a mass member made of sound-absorbing material.

In one embodiment, the sound absorbing member 600 is connected to the sound membrane 500, and thus can vibrate with the vibration of the sound membrane 500, that is, the sound absorbing material is also in a movable state in the rear cavity, so that Fo can be further reduced and optimized The low frequency sensitivity of the speaker 10 reduces power consumption.

In one embodiment, the sound film 500 includes a flat plate portion 510 at an intermediate position and a bent portion 520 surrounding the flat plate portion 510. The bent portion 520 is connected to the flat plate portion 510 and forms a ring shape by itself, and in this embodiment In this case, the bent portion 520 protrudes from the flat portion 510 in a direction away from the rear cavity 12, so that the volume of the rear cavity 12 can be further increased, low frequency sensitivity is optimized, and power consumption is reduced.

In an embodiment, the above-mentioned sound absorbing member 600 is fixed to the flat plate portion 510 of the sound film 500. In this way, it is convenient to install the sound absorbing member 600 on the sound film 500 stably.

In one embodiment, the magnet unit 320 is fixed to the magnetic bowl 310. Specifically, the magnet unit 320 is stacked on the side of the magnetic bowl 310 close to the diaphragm 210, wherein the magnet unit 320 is provided with a penetrating through it in the direction of vibration. On the upper second through hole 3213, the magnetic bowl 310 is provided with a third through hole 311 communicating with the second through hole 3213, that is, the second through hole 3213 and the third through hole 311 penetrate the inner cavity 11 and the rear cavity 12, The inner cavity 11 and the rear cavity 12 communicate with each other through the second through hole 3213 and the third through hole 311.

In an embodiment, in the vibration direction of the diaphragm 210, the first through hole 410, the second through hole 3213, and the third through hole 311 are directly opposite to each other. In this way, the airflow change in the inner cavity 11 can affect the air movement in the back cavity 12 to a greater extent, and more directly affect the vibration of the sound diaphragm 500, so that the volume of the back cavity 12 is in the vibration and sound process of the diaphragm 210. A greater degree of expansion can further optimize the low-frequency sensitivity of the speaker 10 and reduce power consumption. Understandably, at this time, the sound-absorbing material in the encapsulating vent 600 is also directly opposite to the second through hole 3212 and the third through hole 311, so that more sound signals can be quickly absorbed by the sound-absorbing material, thereby effectively improving the sound of the speaker. Sound quality.

In one embodiment, the speaker 10 further includes a breathable diaphragm 700 fixed to the magnetic circuit system 300. The breathable diaphragm 700 is connected to the magnet unit 320 and blocks the second through hole 3213. In this way, the inner cavity 11 and The communication condition of the rear cavity 12 also plays a certain blocking effect, so that the gas communication speed between the inner cavity 11 and the rear cavity 12 is maintained within a certain range, and the sound quality of the speaker 10 is ensured.

In other embodiments of the present application, the breathable membrane 700 covers at least one of the second through hole 3213 and the third through hole 311, that is, the breathable membrane 700 may only be arranged on the magnetic bowl 310 to cover the third through hole 311 , Or two air-permeable diaphragms are respectively fixed on the main magnetic steel 3211 and the magnetic bowl 310 to cover the second through hole 3213 and the third through hole 311, which are not uniquely limited here.

In an embodiment, the magnet unit 320 includes a first magnet part 321 and a second magnet part 322, wherein the second magnet part 322 is arranged around the first magnet part 321, and is left between the first magnet part 321 and the first magnet part 321. The magnetic gap 324, that is, the gap left between the first magnet portion 321 and the second magnet portion 322 satisfies the condition that there is a magnetic induction between the two. In addition, in this embodiment, at least one of the first magnet part 321 and the second magnet part 322 is a permanent magnet.

One end of the voice coil 220 is inserted into the magnetic gap, and the other end is in contact with the diaphragm 210. In this way, the current flowing through the voice coil 220 is placed in the magnetic line of induction between the first magnet part 321 and the second magnet part 322. Among them, the current change can generate corresponding electromagnetic induction force, thereby driving the diaphragm 210 to vibrate and produce sound.

In one embodiment, the first magnet portion 321 includes a main magnet 3211 and a main pole core 3212. The main pole core 3212 is stacked on the side of the main magnet 3211 close to the diaphragm 210, and the breathable diaphragm 700 is clamped. Between the main pole core 3212 and the main magnet 3211; the second magnet portion 322 includes two pairs of magnets 3221 and two side magnets 3222, of which the two pairs of magnets 3221 are located on the left and right sides of the main magnet 3211, The steel 3222 is located on the front and rear sides of the main magnet 3211 respectively.

In addition, in an embodiment, the magnet unit 320 further includes an upper clamping plate 323, which is superimposed on the side of the two pairs of magnets 3221 and two magnets 3222 close to the diaphragm 210, and is connected to the basin frame 100, Thus, the positions of the two pairs of magnets 3221 and the two side magnets 3222 are fixed.

In one embodiment, the magnetic bowl 310 includes a bottom plate and two side plates connected to opposite ends of the bottom plate. The two side plates extend relative to the plane of the bottom plate toward the direction of the diaphragm 210 to form a groove. The main magnet 3211, the auxiliary magnet 3221, and The side magnets 3222 are all set in the groove. As a result, the internal structure of the speaker 10 is more compact and stable, the space occupation is optimized, and the reliability of the structure is also improved.

In one embodiment, the diaphragm 210 includes a dome 211 in the middle position and a folding ring 212 fixedly connected to the dome 211, that is, the folding ring 212 is connected around the dome 211, and the folding ring 212 is connected to the dome 211. The basin frame 100 is connected to realize indirect positioning of the dome 211, and the dome 211 is in contact and fit with the end of the voice coil 220 protruding from the magnetic gap 324. In addition, the folding ring 212 bends and extends from the plane where the dome 211 is located toward the direction where the rear cavity 12 is located.

In an embodiment, the loudspeaker 10 further includes a centering support piece 900, which is a conductive member, is arranged on opposite sides of the voice coil 220 and is electrically connected to the voice coil 220, and the centering support piece 900 One end of 900 protrudes out of the basin frame 100 for electrical connection with an external power source, that is, the centering support piece 900 is electrically connected to the voice coil 220 and the external circuit. In this embodiment, the centering support piece 900 plays a role of stabilizing vibration on the one hand, and on the other hand, it introduces electrical energy into the voice coil 220 to conduct electricity.

In one embodiment, the rear cover 400 is provided with a leakage hole 420, the leakage hole 420 is connected to the rear cavity 12 and the external space, and the leakage hole 420 is covered by a gas-permeable membrane 430. In this way, the pressure can be effectively relieved.

In one embodiment, the speaker 10 further includes a front cover 800, the front cover 800 includes a shutter 820 and a front frame 810, wherein the front frame 810 is connected to the periphery of the shutter 820 and connected to the basin frame 100, and the shutter 820 is A sound hole 821 is opened, and the sound hole 821 is opposite to the dome 211. In this way, on the one hand, the dome 211 and the folding ring 212 can be protected to a certain extent, and on the other hand, the vibration of the dome 211 can be smoothly transmitted. Preferably, the shutter 820 is a metal piece, and there are four sound outlet holes 821.

The audio device provided by the present application includes the above-mentioned speaker 10, and thus has all the beneficial effects of the above-mentioned speaker 10, which will not be repeated here.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these are all protected by this application. range. .

Claims (11)

1. A loudspeaker, characterized in that: the loudspeaker includes a basin frame with an accommodation space, and a vibration system and a magnetic circuit system accommodated in the accommodation space, and the vibration system includes a frame fixed to the basin frame and used for vibrating and sounding , The magnetic circuit system includes a magnetic bowl fixed to the basin frame;

   The magnetic bowl, the diaphragm, and the basin frame are enclosed to form an inner cavity, and the speaker further includes a rear cavity located on a side of the magnetic bowl away from the diaphragm and enclosed with the magnetic bowl The rear cover, the rear cavity is connected to the inner cavity;

   The back cover is provided with a first through hole, and the speaker further includes a sound film fixed to the back cover and covering the first through hole;

   The loudspeaker further includes a sound absorbing member, and the sound absorbing member is arranged in the rear cavity.
2. The loudspeaker according to claim 1, wherein the sound absorbing member is connected to the sound film.
3. The speaker according to claim 1, wherein the magnetic circuit system further comprises a magnet unit fixed to the magnetic bowl, and the magnet unit is provided with a second through hole penetrating therethrough in the direction of vibration, the The magnetic bowl is provided with a third through hole communicating with the second through hole, and the second through hole and the third through hole penetrate the inner cavity and the rear cavity.
4. The speaker according to claim 3, wherein the speaker further comprises a breathable diaphragm fixed to the magnetic circuit system, and the breathable diaphragm cover seals the second through hole and the third through hole. at least one.
5. 4. The speaker according to claim 3, wherein the first through hole, the second through hole, and the third through hole are arranged opposite to each other along the vibration direction of the diaphragm.
6. The speaker according to claim 3, wherein the vibration system further comprises a voice coil that drives the diaphragm to vibrate and produce sound, and the magnet unit comprises a first magnet part provided with the second through hole, and A second magnet part arranged around the first magnet part, a magnetic gap is left between the first magnet part and the second magnet part, and the voice coil is inserted into the magnetic gap and surrounds the first magnet part.磁部。 The magnet section.
7. The loudspeaker according to claim 6, wherein the diaphragm includes a dome in the middle position and a folding ring fixedly connected to the dome, and the folding ring is connected to the basin frame.
8. The loudspeaker according to any one of claims 1 to 7, wherein the sound film includes a flat plate part located at an intermediate position and a bent part connected to the flat plate part.
9. The loudspeaker according to any one of claims 1 to 7, wherein the rear cover is provided with a leakage hole, and the leakage hole communicates the rear cavity and the external space.
10. 8. The speaker according to claim 8, wherein the sound absorbing member is fixed to the flat plate portion.
11. An audio device, characterized in that: the audio device comprises the speaker according to any one of claims 1 to 10.