WO2020258261A1

WO2020258261A1 - Loudspeaker

Info

Publication number: WO2020258261A1
Application number: PCT/CN2019/093738
Authority: WO
Inventors: 张古清
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-30
Also published as: CN210093502U

Abstract

Disclosed in the present application is a loudspeaker, comprising a basket as well as a vibration system and a magnetic circuit system mounted on the basket. The vibration system comprises a diaphragm fixed on the basket and a voice coil supported on one side of the diaphragm. The magnetic circuit system comprises a magnetic bowl fixed on the side of the basket away from the diaphragm and a magnet part fixed on the magnetic bowl. The magnet part is provided with a magnetic gap, and the end of the voice coil away from the diaphragm extends into the magnetic gap; the magnetic bowl is provided with a leakage passage communicated with the magnetic gap; one end of the leakage passage is connected to the magnetic gap, and the other end is connected to the outer side of the speaker. In the speaker of the present application, the leakage passage is provided on the magnetic bowl; one end of the leakage passage is connected to the magnetic gap, and the other end is connected to the outer side of the speaker, such that when the vibration system vibrates, the air under the diaphragm can be discharged through the leakage passage, so that the air circulation is smooth, and noise is avoided, thereby improving the auditory effect.

Description

A kind of speaker

Technical field

The utility model relates to the field of sound and electricity, in particular to a loudspeaker.

Background technique

A speaker is a transducer device that converts an electrical signal into an acoustic signal. The speaker is widely used in various audio and mobile terminal equipment, and mobile phones are undoubtedly the most common mobile terminal equipment. At present, mobile phones have diverse functions, one of them It is high-quality music, and the speaker is one of the necessary conditions for this function.

The loudspeaker usually includes a magnetic circuit system, a vibration system and a basin frame. The vibration system has a diaphragm that pushes air when the diaphragm vibrates to produce sound. However, when the diaphragm of the existing speaker vibrates downwards, the air below the diaphragm is blocked by the magnetic circuit system and the basin when it flows, causing it to flow improperly, resulting in noise and affecting the sense of hearing.

technical problem

The utility model aims at solving the problem that the air flow under the diaphragm is not smooth when the speaker vibration system vibrates and affects the sense of hearing, and provides a new type of speaker.

Technical solutions

In order to achieve the above objective, the present invention provides a loudspeaker including a basin frame and a vibration system and a magnetic circuit system installed on the basin frame. The vibration system includes a diaphragm fixed on the basin frame and supported on the frame. For the voice coil on the side of the diaphragm, the magnetic circuit system includes a magnetic bowl fixed on the side of the frame away from the diaphragm and a magnet portion fixed on the magnetic bowl, the magnet portion having a magnetic gap, One end of the voice coil away from the diaphragm extends into the magnetic gap, the magnetic bowl is provided with a leakage channel communicating with the magnetic gap, one end of the leakage channel is connected to the magnetic gap, and the other end is connected to the magnetic gap. The outside of the speaker communicates.

As an improvement, the magnet portion includes a main magnet portion and a side magnet portion fixed to the magnetic bowl, and the side magnet portions are located on opposite sides of the main magnet portion and are spaced apart from the main magnet portion. In the magnetic gap, the orthographic projection of the side magnet portion on the magnetic bowl covers a part of the leakage channel.

As an improvement, the leakage channels are respectively arranged on opposite sides of the main magnet part.

As an improvement, the leakage channel is a groove recessed from one side of the magnetic bowl close to the magnet portion, one end of the groove extends to the magnetic gap, and the other end extends to the magnetic bowl the edge of.

As an improvement, at least two of the leakage channels are arranged on the same side of the main magnet part at intervals.

As an improvement, at least two of the leakage channels located on different sides of the main magnet part are located on the same straight line.

As an improvement, the magnetic bowl includes a bottom plate and two side plates respectively extending from two opposite sides of the bottom plate toward the basin frame, and the side magnet parts are installed on the other two opposite sides of the bottom plate, The leakage channel is arranged on the bottom plate.

Beneficial effect

The beneficial effect of the present invention is: by providing a leakage channel on the magnetic bowl, the two ends of the leakage channel are respectively connected with the magnetic gap and the outside of the speaker. Therefore, when the vibration system vibrates downwards, the gas under the diaphragm can be discharged through the channel to allow air circulation. Smooth, avoid noise, thereby enhancing the auditory effect.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the speaker of the utility model;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Figure 3 is a sectional view taken along line B-B of Figure 1;

Figure 4 is an exploded schematic diagram of the speaker of the embodiment of the utility model;

Figure 5 is a schematic diagram of the assembly of the magnetic bowl and the main magnet shown in Figure 4;

Fig. 6 is a schematic diagram of the structure of the basin frame shown in Fig. 4.

Reference signs: 100, speaker; 10, basin frame; 20, vibration system; 30, magnetic circuit system; 40, magnetic gap; 21, diaphragm; 22, voice coil; 23, lower sound film; 24, flexible circuit board 211, middle dome; 212, upper sound film; 31, magnetic bowl; 32, magnet part; 321, main magnet part; 322, side magnet part; 3211, main magnet; 3212, pole core; 3221, side magnet Steel; 3222, splint; 311, bottom plate; 312, side plate; 50, leakage channel; 11, ring body; 12, column foot; 13, support part; 231, first edge part; 232, second edge part; 233 , Folding ring department.

Embodiments of the invention

The following describes the present utility model in detail with reference to Figures 1 to 6.

It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom...) in the embodiments of the present utility model are only used to explain that they are in a specific posture (such as As shown in the figure), the relative positional relationship between the components, etc., if the specific posture changes, the directional indication will also change accordingly.

It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, the element may be directly on the other element or there may be a centering element at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intermediate element may also exist.

Please refer to Figure 1, Figure 2, Figure 3 and Figure 4, according to an embodiment of the utility model provides a speaker 100, including a basin frame 10, a vibration system 20 and a magnetic circuit system 30, the basin frame 10 is used to support the vibration system 20 And the magnetic circuit system 30, the magnetic circuit system 30 is used to drive the vibration system 20 to vibrate and produce sound, and the vibration direction of the vibration system 20 is the axial direction of the speaker 100.

The vibration system 20 includes a diaphragm 21, a voice coil 22, a lower sound diaphragm 23, and a flexible circuit board 24. The diaphragm 21 includes a middle dome 211 and an upper sound film 212. The upper sound film 212 is connected to the middle dome 211 and the frame 10 respectively. The vibration system 20 is fixed to the frame 10 through the upper sound diaphragm 212, one axial end of the voice coil 22 is connected to the end of the upper sound diaphragm 212 near the middle dome 211, and the other axial end is connected to the lower sound diaphragm 23 through the The flexible circuit board 24 is connected. When an alternating current is applied to the voice coil 22 through the flexible circuit board 24, the voice coil 22 will vibrate up and down under the action of the magnetic field of the magnetic circuit system 30, and drive the entire vibration system 20 to vibrate, causing the diaphragm 21 to push The air is compressed to produce sound.

The magnetic circuit system 30 includes a magnetic bowl 31 and a magnet portion 32. The magnetic bowl 31 includes a bottom plate 311 and two side plates 312 respectively extending from two opposite sides of the bottom plate 311 toward the flexible circuit board 24 and fixedly connected to the flexible circuit board 24. The magnet The part 32 includes a main magnet part 321 and a side magnet part 322. The main magnet part 321 includes a main magnet 3211 fixed on the bottom plate 311 and a pole core 3212 fixed on the side of the main magnet 3211 away from the bottom plate 311. The side magnet part 322 Including side magnets 3221 fixed to the bottom plate 311 and located on opposite sides of the main magnet 3211 and a splint 3222 stacked on the side of the side magnet 3221 far away from the bottom plate. The side magnets 3221 and the side plate 312 are located on the side of the main magnet 3211. On different sides, the main magnet 3211 and the side magnet 3221 are spaced apart to form a magnetic gap 40, and the end of the voice coil 22 away from the diaphragm 21 extends into the magnetic gap 40. The pole core 3212 and the clamping plate 3222 are made of magnetically conductive materials, and are used to form a magnetic circuit with the main magnet 3211 and the side magnet 3221 to reduce the magnetic resistance.

Please refer to Figures 2, 4 and 5, the magnetic bowl 31 is provided with a number of leakage channels 50, the leakage channels 50 are preferably formed in the bottom plate 311 on the side of the main magnet 3211, one end of the groove and the magnetic The gap 40 is connected, and the other end is connected to the outside of the speaker 100. The opposite sides of the main magnet 3211 are respectively provided with a number of grooves arranged in parallel at intervals. When the diaphragm 21 is vibrated and squeezed downward, the air below the diaphragm 21 It can be discharged through the groove to make the air flow smoothly and avoid noise, thereby improving the sense of hearing; when the diaphragm 21 vibrates upward, the outside air can enter the speaker 100 through the groove, making the pressure inside the speaker 100 and the outside pressure the same.

4 and 6, the basin frame 10 includes a ring body 11, a pedestal 12 located at the bottom of the ring body 11, and a support portion extending from the end of the ring body 12 away from the diaphragm 21 toward the voice coil 22 to support the clamping plate 3222 13. It is understandable that the basin frame 10 and the splint 3222 may be integrally formed by injection molding, or may be assembled separately.

3 and 4, the lower sound diaphragm 23 includes a first edge portion 231 fixedly connected to the end of the voice coil 22 away from the diaphragm 21, a second edge portion 232 spaced apart from the first edge portion 231, and a second edge portion 232 connected to the first edge portion 231. A folding ring portion 233 between an edge portion 231 and a second edge portion 232, opposite sides of the first edge portion 231 are respectively connected to the inner ends of the voice coil 22 and the flexible circuit board 24, and two opposite sides of the second edge portion The sides are respectively connected to the outer end portion of the flexible circuit board 24 and the basin frame 10, and the folding ring portion 243 is an arc structure that bends and extends away from the flexible circuit board 24. Preferably, two lower sound membranes 23 and flexible circuit boards 24 are provided, each lower sound membrane 23 is connected to a flexible circuit board 24, and the two lower sound membranes 23 are respectively connected to two opposite sides of the voice coil 22.

The beneficial effect of the present invention is that by providing a leakage channel 50 on the bottom plate 311 of the magnetic bowl 31, one end of the leakage channel 50 communicates with the magnetic gap 40, and the other end communicates with the outside of the speaker 100, so when the diaphragm 21 vibrates downward , The air under the diaphragm can be discharged through the leakage channel 50, so that the air circulates smoothly and avoid noise; when the diaphragm 21 vibrates upwards, the outside air can enter the speaker 100 through the leakage channel 50 to make the pressure inside the speaker 100 The pressure is the same as the external pressure, thereby enhancing the hearing sense of the speaker 100.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A loudspeaker, characterized in that it comprises a basin frame, a vibration system and a magnetic circuit system installed on the basin frame, the vibration system comprising a diaphragm fixed on the basin frame and a diaphragm supported on one side of the diaphragm. A voice coil, the magnetic circuit system includes a magnetic bowl fixed on the side of the frame away from the diaphragm and a magnet part fixed on the magnetic bowl, the magnet part has a magnetic gap, and the voice coil is far away from the One end of the diaphragm extends into the magnetic gap, the magnetic bowl is provided with a leakage channel communicating with the magnetic gap, one end of the leakage channel communicates with the magnetic gap, and the other end communicates with the outside of the speaker .
The speaker according to claim 1, wherein the magnet part comprises a main magnet part and a side magnet part fixed to the magnetic bowl, and the side magnet part is located on opposite sides of the main magnet part and is connected to The main magnet parts are arranged at intervals to form the magnetic gap, and the orthographic projection of the side magnet parts on the magnetic bowl covers part of the leakage channel.
The loudspeaker according to claim 2, wherein the leakage channels are respectively arranged on opposite sides of the main magnet part.
The speaker according to claim 3, wherein the leakage channel is a groove recessed from a side of the magnetic bowl close to the magnet portion, and one end of the groove extends to the magnetic gap, The other end extends to the edge of the magnetic bowl.
The loudspeaker according to claim 3, wherein at least two of the leakage channels are arranged on the same side of the main magnet part at intervals.
The speaker according to claim 5, wherein at least two of the leakage channels located on different sides of the main magnet part are located on the same straight line.
The speaker according to claim 3, wherein the magnetic bowl includes a bottom plate and two side plates respectively extending from two opposite sides of the bottom plate toward the basin frame, and the side magnet part is installed on the bottom plate. On the other two opposite sides of the bottom plate, the leakage channel is arranged on the bottom plate.