WO2021179237A1

WO2021179237A1 - Loudspeaker

Info

Publication number: WO2021179237A1
Application number: PCT/CN2020/078935
Authority: WO
Inventors: 任莉
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: 2020-03-09
Filing date: 2020-03-12
Publication date: 2021-09-16
Also published as: CN211959507U

Abstract

The utility model provides a loudspeaker, comprising an upper cover plate, and a lower cover plate that fits the upper cover plate and forms an accommodating space with the upper cover plate, and further comprising an air-permeable spacer that divides the accommodating space into an upper accommodating space and a lower accommodating space, a sound-producing unit provided in the upper accommodating space, and a sound-absorbing material provided in the lower accommodating space. The air-permeable spacer of the utility model limits the sound-producing unit in the upper accommodating space, thereby preventing the impact on an acoustic effect caused by the sound-absorbing material entering the inside of the sound-producing unit. In addition, due to the blocking of the air-permeable spacer, the lower accommodating space can wholly be filled with the sound-absorbing material, thereby increasing the volume of the sound-absorbing material.

Description

A kind of speaker

Technical field

The utility model belongs to the technical field of sound generating devices, and particularly relates to a loudspeaker.

Background technique

In order to obtain a better acoustic effect, the speakers in the prior art often fill the inner cavity formed by the upper cover and the lower cover with sound-absorbing materials, but when the sound-producing monomer leaks, the sound-absorbing material enters the sound-producing monomer Internal risks affect the acoustic performance of speakers.

Therefore, it is necessary to provide a speaker with more stable performance.

technical problem

The technical problem to be solved by the utility model is to provide a loudspeaker to solve the problem of the existing loudspeaker structure, when the sound-absorbing material is filled into the internal cavity, the sound-absorbing material may enter the sound-producing monomer.

Technical solutions

In order to solve the above technical problems, the present utility model is implemented as follows. A speaker includes an upper cover plate, and a lower cover plate that cooperates with the upper cover plate and forms a receiving space with the upper cover plate. The accommodating space is divided into an upper accommodating space and an air-permeable partition part of the lower accommodating space, a sound emitting monomer arranged in the upper accommodating space, and a sound-absorbing material arranged in the lower accommodating space;

The air-permeable isolator includes a support frame that surrounds the sound emitting monomer and is fixed to the upper cover plate or the lower cover plate, and is arranged on the support frame and is directly opposite to the upper cover plate and arranged at intervals The air-permeable net, the support frame and the air-permeable net are injection molded into one body, and the sound-producing monomer is fixed between the air-permeable net and the upper cover plate;

The sound-producing unit includes a magnetic circuit system with a magnetic gap and a vibration system supported on the side of the magnetic circuit system away from the air-permeable spacer. The magnetic circuit system is provided with a connection between the magnetic gap and the upper part. The leakage channel of the containing space is communicated with the lower containing space through the air-permeable net.

Further, the vibration system includes a voice coil suspended in the magnetic gap and a diaphragm supported on a side of the voice coil away from the magnetic circuit system; the sound-producing unit also includes a basin frame, the basin The frame is sandwiched between the diaphragm and the magnetic circuit system.

Further, the air-permeable mesh is a flat metal mesh cloth.

Further, the magnetic circuit system and the air-permeable net are bonded and fixed, and the periphery of the vibration system is fixed to the upper cover plate.

Further, the upper cover plate includes a top wall, and an upper side wall bent and extended from the top wall toward one side of the lower cover plate and matched with the lower cover plate.

Further, the upper cover plate further includes a surrounding wall that is bent from the top wall toward the lower cover plate and extends into the receiving space, and the surrounding wall and the supporting frame are directly opposed to each other and fixed to each other. .

Further, the upper cover plate further includes a support wall bent from the top wall toward one side of the lower cover plate to extend into the upper receiving space, and the diaphragm is sandwiched between the support wall and the support wall. Between the basin frame.

Further, the diaphragm is separated from the top wall to form a front acoustic cavity, and the upper side wall is provided with a sound outlet channel that communicates the front acoustic cavity with an external space.

Further, the lower cover plate includes a bottom wall, and a lower side wall bent and extended from the bottom wall toward one side of the upper cover plate, an end surface of the upper side wall and an end surface of the lower side wall Enclosing.

Further, the lower cover plate further includes a limiting protrusion extending from the bottom wall into the lower receiving space, and the air-permeable spacer is sandwiched between the limiting protrusion and the surrounding wall .

Further, the magnetic circuit system includes a magnetic bowl fixed to the air-permeable net and a magnet part installed on a side of the magnetic bowl close to the diaphragm, and the magnetic bowl includes a support plate for supporting the magnet part, and The extension arms are partially bent and extended from the edge of the support plate toward the direction of the diaphragm, and the leakage channel is formed between two adjacent extension arms.

Further, the voice coil has a racetrack shape, and the leakage channels are formed on both sides of the short axis of the voice coil.

Beneficial effect

Compared with the prior art, the present utility model has the beneficial effect that: in the present utility model, the ventilating isolator restricts the sound-producing monomer in the upper containing space, which can prevent the sound-absorbing material from entering the interior of the sound-producing monomer and thus affect the acoustic effect . In addition, due to the barrier of the air-permeable partition, the lower receiving space can be used to contain all the sound-absorbing materials, which increases the storage space for the sound-absorbing powder and improves the performance of the loudspeaker.

Description of the drawings

Figure 1 is a perspective view of an embodiment of a loudspeaker of the present invention.

Fig. 2 is an exploded view of the speaker shown in Fig. 1.

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

Fig. 4 is a cross-sectional view taken along the line B-B of the upper cover and the lower cover of the loudspeaker shown in Fig. 1.

Fig. 5 is a cross-sectional view of the loudspeaker shown in Fig. 1 along the line B-B.

Fig. 6 is a partial perspective view of the sound emitting unit of the speaker shown in Fig. 1.

Fig. 7 is an exploded view of the vocal unit shown in Fig. 6.

Fig. 8 is a structural diagram of the upper cover plate of the loudspeaker shown in Fig. 1.

Fig. 9 is an enlarged view of part C in Fig. 8.

Embodiments of the present invention

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not used to limit the present utility model.

The embodiment of a loudspeaker provided by the present invention is shown in Figures 1 and 2 and includes an upper cover plate 1, a lower cover plate 2 that cooperates with the upper cover plate 1 and forms a containing space with the upper cover plate 1. The air-permeable spacer 3, the sound-producing monomer 4, and the sound-absorbing material 6. The air-permeable spacer 3 is arranged in the receiving space and divides the receiving space into an upper receiving space 51 and a lower receiving space 52, as shown in FIG. 4, In order to make the view clearer and clearly express the position of the air-permeable spacer 3, Figure 4 is a schematic cross-sectional view of the assembly structure of the upper cover plate 1 and the lower cover plate 2, and the cross-sectional view of the sounding monomer 4 and the upper and lower cover plates after being assembled is shown in Fig. 5. The sound absorbing material 6 is arranged in the lower receiving space 52, as shown in FIG. 3.

Specifically, as shown in FIGS. 5-8, the air-permeable isolator 3 includes a support frame 32 that surrounds the sound-producing monomer 4 and is fixed to the upper cover plate 1 or the lower cover plate 2, and is covered on the Breathable nets 31 are arranged on the support frame 32 and are directly opposite to the upper cover 1 and spaced apart. The breathable nets 31 can be made of metal mesh cloth or other materials that are breathable and can prevent sound-absorbing material powder from passing through the breathable nets 31. The sounding monomer 4 is arranged in the upper receiving space 51, that is, fixed between the air-permeable net 31 and the upper cover 1. The sound-emitting unit 4 includes a magnetic circuit system 41 with a magnetic gap and a vibration system 42 supported on the magnetic circuit system 41 and far away from the air-permeable spacer 3, and a communication station is provided on the magnetic circuit system 41. The magnetic gap 413 and the leakage channel 53 of the upper receiving space 51 are communicated with the lower receiving space 52 through the air-permeable net 31. The air-permeable net 31 and the support frame 32 are injection molded into one body, and the air-permeable net 31 is preferably flat.

In this embodiment, the air-permeable spacer 3 restricts the sound-emitting monomer 4 in the upper receiving space 51, which can prevent the sound-absorbing material from entering the inside of the sound-emitting monomer 4 and thereby affect the acoustic effect. In addition, due to the blocking of the air-permeable spacer 3, the lower receiving space 52 can be used to contain all the sound-absorbing materials, thereby increasing the receiving space for the powder of the sound-absorbing material 6 and improving the performance of the speaker.

Specifically, the embodiment of the vibration system 42 can refer to FIGS. 2, 6 and 7, including a voice coil 421 and a diaphragm 422. The voice coil 421 is suspended at the magnetic gap 413, and the diaphragm 422 is supported on the voice coil 421 far away. One side of the magnetic circuit system 41; the sound unit 4 further includes a basin frame 43, which is sandwiched between the diaphragm 422 and the magnetic circuit system 41. In this embodiment, the voice coil 421 may be configured as a racetrack type, specifically including a long shaft 4211 and a short shaft 4212, and the leakage channels are formed on both sides of the short shaft of the voice coil.

Specifically, the embodiment of the magnetic circuit system 41 can be referred to as shown in FIG. 2, FIG. 6 and FIG. The magnet part 412 includes a plurality of magnetic steels, and the magnetic steels are spaced apart to form a magnetic gap 413. The magnetic bowl 411 includes a support plate 4111 supporting the magnet portion 412 and an extension arm 4112 that is partially bent and extended from the edge of the support plate 4111 toward the diaphragm 422. Between two adjacent extension arms 4112 The leakage channels 53 are formed at intervals. Optionally, the magnetic circuit system 41 and the air-permeable net 31 are bonded and fixed, and the periphery of the vibration system 42 is fixed on the upper cover plate 1.

Further, as shown in Figures 8 and 9, the upper cover 1 includes a top wall 11, and an upper side wall 12 that is bent and extended from the top wall 11 toward one side of the lower cover 2. The upper cover 1 is matched with the lower cover plate 2 through the upper side wall 12. Optionally, in the present invention, the sound channel 15 is arranged on the upper side wall 12. Refer to the cross-sectional views of FIGS. 4 and 5, the diaphragm 422 is separated from the top wall 11 to form a front sound cavity 54, and the sound channel 15 The front sound cavity 54 is in communication with the external space of the speaker, so that the sound emitted by the sound emitting unit 4 can be conducted to the outside.

Optionally, as shown in FIGS. 8 and 9, the upper cover plate 1 further includes a surrounding wall 13 that is bent from the top wall 11 toward one side of the lower cover plate 2 and extends into the receiving space. The end surface 131 of the surrounding wall 13 is supported on the support frame 32 of the air-permeable partition 3, and the assembly diagrams are shown in Figs. 4 and 5.

Optionally, with further reference to FIGS. 8 and 9, the upper cover plate 1 further includes a support wall 14 that is bent from the top wall 11 toward one side of the lower cover plate 2 and extends into the upper receiving space. The edge of the sounding monomer 4 is supported on the end surface 141 of the supporting wall 14, as specifically shown in FIG. 5, the diaphragm 422 is sandwiched between the supporting wall 14 and the basin frame 43.

Further, as shown in FIG. 2, the lower cover plate 2 includes a bottom wall 21, and a lower side wall 22 bent and extended from the bottom wall 21 toward one side of the upper cover plate 1. The upper side wall The end surface 121 of 12 is enclosed with the end surface of the lower side wall 22. The assembly diagrams are shown in Figures 4 and 5. Bayonet structure fits. Furthermore, as shown in FIG. 2, protrusions can be provided on the lower cover plate 2, and the protrusions extend from the bottom wall 21 into the lower receiving space 52 for limiting the position of the air-permeable partition 3 As shown in FIG. 2, the protrusion 23A abuts on the outer edge of the support frame 3 to limit the lateral displacement of the air-permeable spacer 3, and the protrusion 23B is used to heighten the air-permeable spacer 3 and increase the volume of the receiving space 52, so that Accommodate more sound-absorbing materials to improve the sound effect of the speaker.

It can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and modifications to the above-mentioned embodiments within the scope of the present utility model. All should be included in the scope of protection of the utility model.

Claims

A loudspeaker comprising an upper cover plate and a lower cover plate matched with the upper cover plate and forming an accommodation space with the upper cover plate, characterized in that:

It also includes a breathable partition that divides the storage space into an upper storage space and a lower storage space, a sound-producing monomer provided in the upper storage space, and a sound-absorbing material provided in the lower storage space;

The air-permeable isolator includes a support frame that surrounds the sound emitting monomer and is fixed to the upper cover plate or the lower cover plate, and is arranged on the support frame and is directly opposite to the upper cover plate and arranged at intervals The air-permeable net, the support frame and the air-permeable net are injection molded into one body, and the sound-producing monomer is fixed between the air-permeable net and the upper cover plate;

The sound-producing unit includes a magnetic circuit system with a magnetic gap and a vibration system supported on the side of the magnetic circuit system away from the air-permeable spacer. The magnetic circuit system is provided with a connection between the magnetic gap and the upper part. The leakage channel of the containing space is communicated with the lower containing space through the air-permeable net.
The speaker according to claim 1, wherein the vibration system comprises a voice coil suspended in the magnetic gap and a diaphragm supported on the side of the voice coil away from the magnetic circuit system; The single body also includes a basin frame, which is sandwiched between the diaphragm and the magnetic circuit system.
The loudspeaker according to claim 1, wherein the air-permeable mesh is a flat metal mesh cloth.
The speaker according to claim 2, wherein the magnetic circuit system is bonded and fixed to the air-permeable net, and the periphery of the vibration system is fixed to the upper cover plate.
The speaker according to claim 2, wherein the upper cover plate comprises a top wall, and an upper cover bent and extended from the top wall toward one side of the lower cover plate and matched with the lower cover plate. Side wall.
The speaker according to claim 5, wherein the upper cover plate further comprises a surrounding wall bent from the top wall toward the lower cover plate and extending into the receiving space, the surrounding wall and The supporting frames are directly opposite and fixed to each other in cooperation.
The loudspeaker of claim 6, wherein the upper cover plate further comprises a support wall bent from the top wall toward one side of the lower cover plate to extend into the upper receiving space, and The diaphragm is sandwiched between the supporting wall and the basin frame.
The loudspeaker according to claim 5, wherein the diaphragm and the top wall form a front acoustic cavity at a distance, and the upper side wall is provided with a sound channel connecting the front acoustic cavity with an external space.
The speaker according to claim 6, wherein the lower cover plate comprises a bottom wall, and a lower side wall bent and extended from the bottom wall toward one side of the upper cover plate, and the upper side wall The end surface is enclosed with the end surface of the lower side wall.
The speaker according to claim 9, wherein the lower cover plate further comprises a limiting protrusion extending from the bottom wall into the lower receiving space, and the air-permeable spacer is sandwiched between the limiting protrusion Between the protrusion and the surrounding wall.
The speaker according to claim 2, wherein the magnetic circuit system comprises a magnetic bowl fixed to the air-permeable net and a magnet part installed on the side of the magnetic bowl close to the diaphragm, and the magnetic bowl It includes a support plate supporting the magnet portion and an extension arm partially bent and extended from the edge of the support plate toward the direction of the diaphragm, and the leakage channel is formed at an interval between two adjacent extension arms.
The loudspeaker of claim 11, wherein the voice coil has a racetrack shape, and the leakage channels are formed on both sides of the short axis of the voice coil.