WO2020258226A1

WO2020258226A1 - Loudspeaker

Info

Publication number: WO2020258226A1
Application number: PCT/CN2019/093606
Authority: WO
Inventors: 宋威; 张帆
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: CN210168218U

Abstract

The present application relates to the technical field of sound generation devices, and provided thereby is a loudspeaker. The loudspeaker comprises a lower clamping plate provided with an accommodating space, a magnetic circuit system and a vibration system accommodated within the accommodating space, an upper clamping plate fixed on the magnetic circuit system, and a supporting ring fixed on a side of the upper clamping plate away from the lower clamping plate. The vibration system comprises an upper sound diaphragm molded on a side of the supporting ring away from the upper clamping plate, and a voice coil that drives the upper sound diaphragm to vibrate. The supporting ring comprises an upper surface facing the upper sound diaphragm. The upper sound diaphragm comprises a lower surface molded on the upper surface. The supporting ring is recessed from the upper surface inward so as to form several notch portions, and the upper sound diaphragm is molded and fixed on the supporting ring and fills the notch portions to form filling portions. When the upper sound diaphragm of the present application is molded and fixed on the supporting ring, the filling portions formed by the upper sound diaphragm are filled in the notch portions of the supporting ring, which increases the bonding area between the supporting ring and the upper sound diaphragm, such that bonding strength is significantly improved, reliability is high, and product quality is improved.

Description

speaker

Technical field

The present invention relates to the technical field of sound emitting devices, in particular to a loudspeaker.

Background technique

With the rapid development of technology, the popularity of speakers is getting higher and higher. People's requirements for speakers are not only limited to the playback of video and audio, but also have higher requirements for the sound quality and reliability of the sound played by the speakers. The speakers are directly related to The sound quality of the playback sound is good or bad and the product is stable.

In the prior art speaker, the support ring for supporting the sound membrane and the sound membrane are integrated by hot pressing or injection molding. However, the joint surface of the support ring and the sound membrane is flat, resulting in the combination of the support ring and the sound membrane The area is small, the combination of the two is weak, and its reliability is poor.

technical problem

The purpose of the present invention is to provide a speaker, which aims to solve the problem of poor reliability due to the weak bonding strength between the support ring and the sound membrane in the speaker in the prior art.

Technical solutions

The present invention provides a loudspeaker which includes a lower splint with a storage space, a magnetic circuit system and a vibration system contained in the storage space, an upper splint fixed on the magnetic circuit system, and an upper splint fixed on the upper splint away from The support ring on one side of the lower splint, the vibration system includes an upper sound diaphragm formed on the side of the support ring away from the upper splint and a voice coil that drives the upper sound diaphragm to vibrate, the support ring includes a facing The upper surface of the upper sound membrane includes a lower surface molded and fixed on the upper surface; the support ring is recessed from the upper surface to form a plurality of notches, and the upper sound membrane is molded It is fixed to the support ring and fills the gap part to form a filling part.

Further, the upper sound membrane is fixed to the support ring by hot pressing or injection molding.

Further, the width of the notch portion gradually increases from the upper surface to the bottom of the notch portion.

Further, the plurality of notches are arranged at intervals along the circumferential direction of the support ring.

Further, the support ring further includes an inner wall close to the voice coil and an outer wall opposite to the inner wall, and the upper sound membrane further includes a side formed by bending from the lower surface toward a side close to the support ring Surface, the side surface is molded and fixed on the outer wall.

Further, the notch part penetrates the inner wall and the outer wall.

Further, the filling part is formed between the side surface and the lower surface.

Further, the vibration system further includes a voice coil bracket fixed on the side of the voice coil close to the upper sound film, a flexible circuit board fixed on the side of the voice coil bracket close to the lower splint, and The flexible circuit board is close to the lower sound membrane on one side of the lower splint.

Further, the magnetic circuit system includes a main magnet fixed to the lower splint near the voice coil side and corresponding to the middle of the upper sound diaphragm, and is attached to the main magnet close to the upper sound The pole core on the side of the membrane, the secondary magnet arranged on the side of the lower clamping plate close to the voice coil and spaced from the main magnetic steel to form a magnetic gap, and the secondary magnetic steel far from the lower clamping plate. The auxiliary magnet corresponding to the side, the upper clamping plate is sandwiched between the auxiliary magnet and the auxiliary magnet.

Beneficial effect

The speaker of the present invention forms a notch portion recessed inward on the upper surface of the support ring, and is fixed to the support ring by molding the upper sound film to form a filling portion filled in the notch, so that when the upper sound film is molded on the support ring, the upper The filling part formed by the membrane material of the sound membrane is filled in the notch part to increase the bonding area between the support ring and the upper sound membrane, thereby significantly improving the bonding strength, high reliability, and improving product quality.

Description of the drawings

Fig. 1 is a schematic diagram of the overall structure of a speaker according to an embodiment of the present invention;

2 is a schematic diagram of an exploded structure of a speaker according to an embodiment of the present invention;

Fig. 3 is a schematic sectional view of the structure taken along the A-A direction in Fig. 1;

4 is a schematic diagram of the enlarged structure of area B in FIG. 2;

Fig. 5 is a schematic diagram of another angle structure of the upper sound film in Fig. 2;

Fig. 6 is a schematic diagram of an enlarged structure of the C area in Fig. 5;

FIG. 7 is a schematic diagram of the enlarged structure of the D area in FIG. 3.

Embodiments of the invention

The present invention will be further described below with reference to the drawings and embodiments.

Refer to Fig. 1 to Fig. 3, which is a speaker provided by an embodiment of the present invention. The speaker includes a lower splint 1 with a storage space 10, a magnetic circuit system 2 and a vibration system 3 housed in the storage space 10, an upper splint 4 fixed on the magnetic circuit system 2, and a side of the upper splint 4 that is far away from the lower splint.的Support Ring5. The vibration system 3 includes an upper sound diaphragm 31 formed on the side of the support ring 5 away from the upper splint 1, a voice coil 32 that drives the upper sound diaphragm 31 to vibrate, a voice coil bracket 33 fixed on the side of the voice coil 32 close to the upper sound diaphragm 31, The flexible circuit board 34 fixed to the voice coil support 33 on the side close to the lower plate 1 and the lower sound membrane 35 fixed to the flexible circuit board 34 on the side close to the lower plate 1.

Specifically, the end of the voice coil support 33 close to the upper sound membrane is embedded on the voice coil, the end of the voice coil support 33 away from the upper sound membrane 31 is bonded to the upper end of the flexible circuit board 34, and the lower sound membrane 35 is bonded to the flexible circuit board 34. At the lower end of the magnetic circuit system 2, the voice coil 32 is driven to vibrate, and the voice coil 32 drives the upper sound membrane 31 and the lower sound membrane 35 to vibrate and produce sound through the voice coil support 33.

In the above embodiment, the magnetic circuit system 2 includes a main magnet 21 fixed on the side of the lower splint 1 close to the voice coil 32 and corresponding to the middle of the upper sound film 31, and is attached to the main magnet 21 on the side close to the upper sound film 31 The pole core 22 is arranged on the side of the lower clamp 1 close to the voice coil 32 and is spaced from the main magnet 21 to form a magnetic gap 20, and the auxiliary magnet 23 corresponding to the side of the auxiliary magnet 23 away from the lower clamp 1 The magnetic steel 24 and the upper clamping plate 4 are sandwiched between the auxiliary magnetic steel 23 and the auxiliary magnetic steel 24 to further enhance the magnetic field strength of the magnetic circuit system 2.

Please refer to FIGS. 4 to 6 together. The support ring 5 includes an upper surface 51 facing the upper sound film 31, and the upper sound film 31 includes a lower surface 311 formed on the upper surface 51. The support ring 5 is recessed from its upper surface 51 to form a plurality of notches 52, and the upper sound film 31 is molded and fixed to the support ring 5 and fills the notches 52 to form a filling part 312. Specifically, the upper sound membrane 31 is fixed to the support ring 5 by hot pressing or injection molding, and the filling part 312 is filled in the filling part 312 by hot pressing or injection molding.

In this embodiment, the width of the notch 52 gradually increases from the upper surface of the support ring 5 toward the bottom of the notch 312. Specifically, the notch 52 is an isosceles trapezoid to further increase the gap between the filling portion 312 and the notch 52. The bonding area and filling stability enhance the bonding strength between the support ring 5 and the upper sound membrane 31. Several notches 52 are spaced apart along the circumferential direction of the support ring 5. Specifically, the notches 52 are provided around the support ring 5 to enhance the overall stability of the upper sound membrane 31 formed on the support ring 5.

Please refer to FIG. 7 together. The above-mentioned support ring 5 also includes an inner wall 53 close to the voice coil 32 and an outer wall 54 opposite to the inner wall 53. The notch 52 penetrates the inner wall 53 and the outer wall 54 to maximize the notch 52 and filling The contact surface area of the part 312 improves the molding bonding strength. The above-mentioned upper sound film 31 also includes a side surface 313 formed by bending from the lower surface 311 toward the side close to the support ring 5. The side surface 313 is formed and fixed on the outer wall 54, and the filling portion 312 is formed between the side surface 313 and the lower surface 311 Therefore, when the upper sound membrane 31 is formed on the support ring 5, the bonding strength is ensured.

In summary, in the speaker of the present invention, the upper surface 51 of the support ring 5 is recessed to form a notch 52, and the upper sound film 31 is molded and fixed on the support ring 5 to form a filling portion 312, so that the upper sound film 31 is heated When it is pressed or injection-molded and fixed on the support ring, the filling portion 312 formed by the membrane material of the upper sound membrane 31 is filled in the notch 52 of the support ring 5 to increase the bonding area between the support ring 5 and the upper sound membrane 31, In order to enhance the bonding strength between the support ring 5 and the upper sound membrane 31, the reliability is high and the product quality is improved.

The above are only the embodiments of the present invention. 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 invention, but these all belong to the present invention. The scope of protection.

Claims

A speaker includes a lower splint with a storage space, a magnetic circuit system and a vibration system contained in the storage space, an upper splint fixed on the magnetic circuit system, and an upper splint fixed on the upper splint away from the lower A support ring on one side of the splint, the vibration system includes an upper sound diaphragm formed on the side of the support ring away from the upper splint and a voice coil that drives the upper sound diaphragm to vibrate, the support ring includes The upper surface of the sound membrane includes a lower surface molded and fixed on the upper surface; wherein the support ring is recessed from the upper surface to form a plurality of notches, and the upper sound membrane It is molded and fixed to the support ring and fills the gap to form a filling portion.
The speaker according to claim 1, wherein the upper sound film is fixed to the support ring by hot pressing or injection molding.
The speaker according to claim 1, wherein the width of the notch portion gradually increases from the upper surface toward the bottom of the notch portion.
The speaker according to claim 1, wherein the plurality of notches are arranged at intervals along the circumferential direction of the support ring.
The speaker according to claim 4, wherein the support ring further includes an inner wall close to the voice coil and an outer wall opposite to the inner wall, and the upper sound film further includes A side surface formed by bending one side of the support ring, and the side surface is formed and fixed on the outer wall.
The speaker according to claim 5, wherein the notch portion penetrates the inner wall and the outer wall.
The speaker according to claim 5, wherein the filling part is formed between the side surface and the lower surface.
The speaker according to claim 1, wherein the vibration system further comprises a voice coil bracket fixed to the voice coil on a side close to the upper sound film, and fixed to the voice coil bracket close to the lower splint. A flexible circuit board on one side and a lower sound membrane fixed on the flexible circuit board on a side close to the lower clamping plate.
The loudspeaker according to claim 1, wherein the magnetic circuit system comprises a main magnetic steel fixed on the side of the lower splint close to the voice coil and corresponding to the middle of the upper sound film, which is attached to The main magnet is close to the pole core on the side of the upper sound film, the auxiliary magnet is arranged on the side of the lower clamping plate close to the voice coil and is spaced from the main magnet to form a magnetic gap, and The auxiliary magnetic steel is away from the auxiliary magnetic steel corresponding to the side of the lower clamping plate, and the upper clamping plate is sandwiched between the auxiliary magnetic steel and the auxiliary magnetic steel.