WO2021093003A1

WO2021093003A1 - Loudspeaker enclosure

Info

Publication number: WO2021093003A1
Application number: PCT/CN2019/120331
Authority: WO
Inventors: 刘晓东; 张龙
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: 2019-11-12
Filing date: 2019-11-22
Publication date: 2021-05-20
Also published as: CN210781329U

Abstract

The present application relates to the technical field of electroacoustic transducer devices; provided is a loudspeaker enclosure, comprising a bottom plate, a surrounding wall arranged around said bottom plate to form an accommodating space, and a loudspeaker unit accommodated in said accommodating space; the loudspeaker unit comprises a vibration system and a magnetic circuit system; the magnetic circuit system comprises a magnetic bowl and a magnet fixed to the magnetic bowl; the loudspeaker enclosure also comprises a support magnet sandwiched between the magnetic bowl and the bottom plate. In the loudspeaker enclosure provided by the present application, the erection of the support magnet between the magnetic bowl and the bottom plate supports the loudspeaker unit, increases the accommodating space for the loudspeaker unit, and enhances the magnetic permeability function of the magnetic circuit system in the loudspeaker unit, thereby improving the performance of the entire loudspeaker enclosure.

Description

Speaker box

Technical field

The utility model relates to the technical field of electroacoustic energy conversion devices, in particular to a speaker box.

Background technique

With the continuous development of society, speakers are more and more widely used in portable electronic devices such as mobile phones, notebook computers, and hearing aids. As people have higher and higher functional requirements for portable electronic devices, the speakers used on them are also Correspondingly develop rapidly.

The structure of the loudspeaker mainly includes a loudspeaker unit, an upper cover, a bottom plate, and a surrounding wall. The upper cover, the bottom plate and the surrounding wall enclose the speaker unit to form an accommodating cavity. At present, after the speaker unit is placed in the accommodating cavity, it occupies almost all the space of the cavity, especially the cavity space between the unit and the bottom plate, which makes the space of the cavity too small and affects the performance of the speaker. The magnetic circuit system in the speaker unit is weak, which affects the performance of the speaker.

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

Summary of the invention

technical problem

The utility model aims at solving the problems that the existing speaker box has a small cavity and weak magnetic permeability of the magnetic circuit system, which affects the performance of the speaker box, and provides a speaker box.

The solution to the problem

Technical solutions

In order to achieve the above objective, the present invention provides a speaker box, which includes a bottom plate, a wall surrounding the bottom plate to form an accommodating space, and a speaker unit accommodated in the accommodating space, the speaker unit including a vibration A system and a magnetic circuit system. The magnetic circuit system includes a magnetic bowl and a magnetic steel fixed to the magnetic bowl, and the speaker box further includes a supporting magnetic steel sandwiched between the magnetic bowl and the bottom plate.

As an improvement, the vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound, and the magnetizing direction of the supporting magnet is perpendicular to the vibration direction of the diaphragm.

As an improvement, the magnet includes a main magnet fixed to the magnetic bowl and a side magnet arranged around the main magnet and forming a magnetic gap with the main magnet, and the supporting magnet and The magnetic gaps are arranged directly opposite, and the polarity of the side of the supporting magnet close to the side magnet is opposite to the polarity of the side of the side magnet close to the supporting magnet.

As an improvement, there are two supporting magnets, and the two supporting magnets are respectively arranged on two opposite sides of the main magnet, and both are arranged directly opposite to the magnetic gap.

As an improvement, the magnetic steel further includes a secondary magnetic steel arranged on a side of the side magnetic steel away from the bottom plate, and the opposite end of the side magnetic steel and the secondary magnetic steel has the same polarity.

As an improvement, the speaker unit further includes a basin frame for the installation of the vibration system and the magnetic circuit system, an upper cover arranged on the top of the basin frame, and two The first dust-proof parts on both sides of the bottom of the frame, the surrounding wall is connected to the upper cover, the first dust-proof part is connected to one end of the basin frame close to the bottom plate, and both ends of the magnetic bowl are respectively It is connected with the two first dustproof parts.

As an improvement, the vibration system further includes a dome, the diaphragm includes a ring-shaped diaphragm and a lower sound diaphragm, the outer side of the ring-shaped diaphragm is connected to the top of the basin frame, and the inner side of the ring-shaped diaphragm Connected to the outer side of the dome, the outer side of the lower sound membrane is connected to the bottom of the basin frame, the top of the voice coil abuts against the dome, and the bottom part of the voice coil is connected to the bottom Sound mode butt.

As an improvement, the vibration system further includes two elastic support members respectively provided on two opposite sides of the voice coil, and the elastic support member includes an elastic support body connected to the basin frame and an elastic support member. The support body is an elastic arm extending in the direction of the voice coil, and an end of the elastic arm away from the elastic support body is sandwiched between the lower sound membrane and the voice coil.

The beneficial effects of the invention

Beneficial effect

The beneficial effect of the present invention is: by erecting a supporting magnet between the magnetic bowl and the bottom plate, the supporting magnet can not only support the speaker unit, but can not only increase the accommodating space for accommodating the speaker unit, but also can strengthen the speaker The magnetic permeability function of the magnetic circuit system in a single unit improves the performance of the entire speaker box.

Brief description of the drawings

Description of the drawings

Fig. 1 is a schematic structural diagram of a speaker box provided by an embodiment of the present invention.

Figure 2 is an exploded view of the speaker box provided by an embodiment of the present invention.

Fig. 3 is a cross-sectional view along the line A-A in Fig. 1.

Fig. 4 is a partial enlarged view of B in Fig. 3.

Fig. 5 is an exploded view of a speaker unit provided by an embodiment of the present invention.

Fig. 6 is a structural schematic diagram of the cooperation of the basin frame, the upper cover and the first dustproof part provided by the embodiment of the present invention.

Explanation of icon numbers: 100, speaker box; 1, speaker unit; 11, vibration system; 111, ring diaphragm; 112, dome; 113, voice coil; 114, lower sound film; 115, elastic support; 1151 , Elastic support body; 1152, elastic arm; 12, magnetic circuit system; 121, magnetic bowl; 122, main magnet; 123, side magnet; 124, magnetic gap; 125, auxiliary magnet; 126, upper splint; 127. Polar core; 128. Second dustproof part; 13. Basin frame; 14. Upper cover; 141. Sound hole; 15. First dustproof part; 2. Bottom plate; 21. Through hole; 3. Surrounding wall ; 4. Supporting magnetic steel; 5. Containment space; 6. Sound-absorbing parts.

Invention embodiment

Detailed ways

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

1 to 4, an embodiment of the present invention provides a speaker box 100, which includes a bottom plate 2, a wall 3 that surrounds the bottom plate 2 to form an accommodating space 5, and a speaker unit 1 accommodated in the accommodating space 5. The speaker unit 1 includes a vibration system 11 and a magnetic circuit system 12. The magnetic circuit system 12 includes a magnetic bowl 121 and a magnetic steel fixed to the magnetic bowl 121. The speaker box 100 also includes a support sandwiched between the magnetic bowl 121 and the bottom plate 2. Magnet 4. In this design method, by erecting the supporting magnet 4 between the magnetic bowl 121 and the bottom plate 2, the supporting magnet 4 can support the speaker unit 1, and not only enlarges the accommodating space 5 of the speaker unit 1 The space can also enhance the magnetic permeability function of the magnetic circuit system in the speaker unit 1, thereby improving the performance of the entire speaker box 100.

Preferably, the vibration system 11 includes a diaphragm and a voice coil 113 that drives the diaphragm to vibrate and produce sound, and the magnetizing direction of the supporting magnet 4 is perpendicular to the vibration direction of the diaphragm.

Preferably, the magnet includes a main magnet 122 fixed to the magnetic bowl 121, a side magnet 123 arranged around the main magnet 122 and spaced from the main magnet 122 to form a magnetic gap 124, and a side magnet 123 located far away from the bottom plate 2 On the side of the auxiliary magnet 125, the supporting magnet 4 and the magnetic gap 124 are arranged directly opposite. The polarity of the supporting magnet 4 on the side close to the side magnet 123 is opposite to the polarity of the side magnet 123 on the side close to the supporting magnet 4. The opposite ends of the magnet 123 and the auxiliary magnet 125 have the same polarity. Specifically, referring to FIGS. 4 and 5, the magnetic circuit system 12 includes a magnetic bowl 121, a main magnet 122 fixed to the magnetic bowl 121, and a side arranged around the main magnet 122 and spaced from the main magnet 122 to form a magnetic gap 124 Magnet 123, secondary magnet 125 arranged on the side of the side magnet 123 away from the bottom plate 2, the upper clamping plate 126 sandwiched between the side magnet 123 and the secondary magnet 125, and stacked on the main magnet 122 away from the bottom plate 2. On one side of the pole core 127, a second dustproof member 128 is sandwiched between the main magnetic steel 122 and the pole core 127. The supporting magnet 4 is arranged between the magnetic bowl 121 and the bottom plate 2, and the supporting magnet 4 is arranged directly opposite to the magnetic gap 124. The polarity of the side of the supporting magnet 4 close to the side magnet 123 is opposite to the polarity of the side magnet 123 close to the end of the supporting magnet 4, and the opposite end of the side magnet 123 and the auxiliary magnet 125 have the same polarity, for example, the side magnet The end of the steel 123 connected to the magnetic bowl 121 is the N pole, the end of the side magnet 123 away from the magnetic bowl 121 is the S pole, and the side supporting the magnet 4 close to the side magnet 123 and facing the wall 3 is the S pole, and the other The side is the N pole, the end of the auxiliary magnet 125 connected to the upper clamping plate 126 is the S pole, and the end of the auxiliary magnet 125 away from the upper clamping plate 126 is the N pole. In this design, by setting the polarity of the side of the supporting magnet 4 close to the side magnet 123 and the polarity of the side magnet 123 close to the end of the supporting magnet 4 are opposite, the supporting magnet 4 can enhance the main magnet 122 and the side magnet. The magnetic permeability of the steel 123 improves the performance of the speaker unit 1. By setting the opposite end of the side magnet 123 and the auxiliary magnet 125 to have the same polarity, the density of magnetic lines of induction in the magnetic gap 124 can be increased, and the magnetic circuit can be improved. The performance of the system 12 improves the performance of the speaker unit 1.

Preferably, there are two supporting magnets 4, and the two supporting magnets 4 are respectively disposed on two opposite sides of the main magnet 122, and both are disposed directly opposite to the magnetic gap 124. The magnetic permeability function of the speaker unit 1 is further enhanced.

In this embodiment, the main magnet 122 is a rectangle with rounded corners, and four side magnets 123 are arranged around the main magnet 122 at intervals. The two auxiliary magnets 125 are respectively arranged on the two long sides of the main magnet 122. The side magnets 123 arranged at intervals are away from the side of the bottom plate 2, and the magnetic gap 124 formed by the two long sides of the main magnet 122 and the two long sides of the main magnet 122 and the corresponding side magnet 123 are arranged directly opposite to each other. It can be understood that only one side magnet 123 is provided at two opposite sides of the main magnet 122 and spaced from the main magnet 122 respectively.

Please refer to Figures 5 and 6, the speaker unit 1 further includes a basin frame 13 for the installation of the vibration system 11 and the magnetic circuit system 12, an upper cover 14 arranged on the top of the basin frame 13, and two basin frames respectively. 13 The first dustproof part 15 on both sides of the bottom of the bottom part, the upper cover 14 is provided with a sound hole 141 to facilitate the transmission of the sound emitted by the vibration system 11, the surrounding wall 3 is connected with the upper cover 14, and the first dustproof part 15 is connected to the basin One end of the frame 13 close to the bottom plate 2 is connected, two ends of the magnetic bowl 121 are respectively connected to the two first dustproof parts 15, and the upper clamping plate 126 is fixed to the basin frame 13.

Preferably, the diaphragm includes an annular diaphragm 111 and a lower sound diaphragm 114. In this embodiment, the vibration system 11 includes a ring-shaped diaphragm 111, a dome 112, a voice coil 113, a lower sound diaphragm 114, and an elastic support 115. The outer side of the ring-shaped diaphragm 111 is connected to the top of the basin frame 13, and the ring-shaped vibration The inner side of the membrane 111 is connected to the outer side of the dome 112, the voice coil 113 can be movably embedded in the magnetic gap 124, the top of the voice coil 113 abuts the dome 112, and the bottom part abuts the elastic support 115. There are two elastic support members 115, which are respectively located on two opposite sides of the voice coil 113, and serve as an elastic support for the voice coil 113. The lower sound diaphragm 114 is also provided with two, respectively corresponding to the elastic support members 115 facing the bottom plate 2. One side. The elastic support 115 includes an elastic support body 1151 connected to the basin frame 13 and an elastic arm 1152 extending from the elastic support body 1151 toward the voice coil 113. The end of the elastic arm 1152 away from the elastic support body 1151 is clamped in the lower sound. Between the membrane 114 and the voice coil 113. By arranging two elastic supports 115 on two opposite sides of the voice coil 113 to support the voice coil 113, the vibration of the voice coil 113 can be made more stable, and the sound effect of the annular diaphragm 111 can be improved. Preferably, the elastic support 115 is a flexible circuit board, and the voice coil 113 communicates with an external circuit through the elastic support 115.

The bottom plate 2 is provided with a through hole 21 communicating with the accommodating space 5, the through hole 21 is used to balance the air pressure in the accommodating space 5, the bottom plate 2 is embedded with a sound absorbing member 6 in the through hole 21, and the sound absorbing member 6 is used to absorb the speaker unit 1 The sound diffused into the receiving space 5 during operation prevents the sound in the receiving space 5 from diffusing out through the through hole 21, and the sound absorbing member 6 has a mesh structure.

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 present utility model. New scope of protection.

Claims

A speaker box comprising a bottom plate, a wall surrounding the bottom plate to form an accommodating space, and a speaker unit accommodated in the accommodating space, the speaker unit including a vibration system and a magnetic circuit system, The magnetic circuit system includes a magnetic bowl and a magnetic steel fixed to the magnetic bowl, and is characterized in that the speaker box further includes a supporting magnetic steel sandwiched between the magnetic bowl and the bottom plate.
The speaker box according to claim 1, wherein the vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound, and the magnetizing direction of the supporting magnet is perpendicular to the vibration direction of the diaphragm.
The speaker box according to claim 2, wherein the magnetic steel comprises a main magnetic steel fixed to the magnetic bowl and a side arranged around the main magnetic steel and forming a magnetic gap with the main magnetic steel. Magnetic steel, the supporting magnetic steel is arranged directly opposite to the magnetic gap, and the polarity of the supporting magnetic steel side close to the side magnetic steel is opposite to the polarity of the side magnetic steel side close to the supporting magnetic steel side .
The loudspeaker box according to claim 3, characterized in that there are two supporting magnets, and the two supporting magnets are respectively arranged on two opposite sides of the main magnet, and are both connected to the magnet. The gap is set directly opposite.
The speaker box according to claim 3, wherein the magnetic steel further comprises a secondary magnetic steel arranged on the side of the side magnetic steel away from the bottom plate, and the side magnetic steel is opposite to the secondary magnetic steel. The polarity is the same at one end.
The speaker box according to claim 2, wherein the speaker unit further comprises a basin frame for installing the vibration system and the magnetic circuit system, an upper cover arranged on the top of the basin frame, And two first dustproof parts respectively arranged on both sides of the bottom of the basin frame, the surrounding wall is connected with the upper cover, and the first dustproof part is connected with the end of the basin frame close to the bottom plate , The two ends of the magnetic bowl are respectively connected with the two first dustproof parts.
The speaker box according to claim 6, characterized in that: the vibration system further comprises a dome, the diaphragm includes a ring-shaped diaphragm and a lower sound diaphragm, the outer side of the ring-shaped diaphragm and the top of the basin frame Connected, the inner side of the annular diaphragm is connected with the outer side of the dome, the outer side of the lower sound diaphragm is connected with the bottom of the basin frame, the top of the voice coil abuts against the dome, the The bottom part of the voice coil abuts the lower sound mode.
The speaker box according to claim 7, characterized in that: the vibration system further comprises two elastic support members respectively arranged on two opposite sides of the voice coil, and the elastic support member includes a support member connected to the basin frame. An elastic support body and an elastic arm extending from the elastic support body toward the voice coil, and an end of the elastic arm away from the elastic support body is sandwiched between the lower sound membrane and the voice coil between.