CN210075566U

CN210075566U - Loudspeaker

Info

Publication number: CN210075566U
Application number: CN201921000970.6U
Authority: CN
Inventors: 陈政宏; 张瑞成; 翁秸宸; 郑春隆
Original assignee: Merry Technology Suzhou Co Ltd
Current assignee: Merry Technology Suzhou Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-02-14
Anticipated expiration: 2029-06-28

Abstract

The utility model provides a loudspeaker, its includes basin frame, vibrating diaphragm, voice coil loudspeaker voice coil subassembly, magnet and pole piece, the vibrating diaphragm with the basin frame voice coil loudspeaker voice coil subassembly fixed connection, the voice coil loudspeaker voice coil subassembly encircles magnet with the pole piece, the pole piece set up in the magnet upper surface, the pole piece with first clearance has between the voice coil loudspeaker voice coil subassembly, it has the magnetic fluid to adhere to in the first clearance, the concave orientation that is equipped with of pole piece outer peripheral edges at least a recess of vibrating diaphragm, the magnetic flux density of groove part is lower around than, reduces the magnetic fluid adsorption capacity, avoids the magnetic circuit of loudspeaker to produce sealed chamber, prevents to take place the resonance of sealed chamber itself, prevents that the acoustic curve from changing, avoids many peak value and valley value outside expecting, maintains good tone quality and the sense of hearing of loudspeaker.

Description

Loudspeaker

Technical Field

The utility model relates to an electroacoustic product technical field especially relates to a speaker with magnetic fluid and pole piece.

Background

With the rapid development of the electronic industry, communication and entertainment equipment has become an indispensable part in the life of people, a loudspeaker is an important acoustic component of electronic equipment and is used for completing the conversion between an electric signal and a sound signal, the sound quality played by the loudspeaker directly influences the experience of people on the electronic equipment, and high sound quality and low distortion are always important points and difficulties in the research and development of the technical field of loudspeakers. …

At present in popular smart mobile phone's technical development, for reaching this purpose of improving the audio, single speaker has been replaced by the speaker module that integrates, and traditional speaker relatively can effectively promote the low frequency playback effect, the future development trend of speaker module: the volume is smaller, thinner, the low frequency effect is better. In general, the bearing power of a loudspeaker is limited by the heat resistance of a voice coil, the larger the power is, the larger the generated heat is, the temperature of the voice coil is increased rapidly, and when the bearing limit of the voice coil material is reached, the voice coil can be burnt; the traditional solution is to add magnetic fluid in the gap between the pole piece and the voice coil, because the heat conduction coefficient of the magnetic fluid is far greater than that of air, heat energy can be effectively dissipated in the air through the pole piece, the magnet and the basin frame, thereby preventing the voice coil from being burnt out, delaying the aging of voice coil materials and glue, thereby prolonging the service life of the speaker, in addition, the addition of the magnetic fluid can also increase the BL value of the speaker (B means the average residual magnetic flux density inside the voice coil of the voice coil in the static magnetic field, L means the length of the voice coil, after the addition of the magnetic fluid, the B value is increased, the static magnetic field inside the voice coil can also be increased), and the magnetic fluid has certain damping characteristic, the voice coil displacement can be inhibited, the distortion of the speaker caused by overlarge amplitude is avoided, and the voice coil position is fixed to avoid the.

Please refer to a speaker disclosed in U.S. Pat. No. 7266214B2, in which the addition of magnetic fluid can generate a plurality of closed cavities in the magnetic circuit, and further cause resonance of the closed cavities, so that the acoustic curve has extra peak and valley values, which are not expected, and the sound quality is adversely affected, thereby affecting the hearing.

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

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an avoid magnetic circuit to produce speaker in airtight chamber.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a loudspeaker, its includes basin frame, vibrating diaphragm, voice coil loudspeaker voice coil subassembly, magnet and pole piece, the vibrating diaphragm with the basin frame voice coil loudspeaker voice coil subassembly fixed connection, the voice coil loudspeaker voice coil subassembly encircles magnet with the pole piece, the pole piece set up in the magnet upper surface, the pole piece with first clearance has between the voice coil loudspeaker voice coil subassembly, it has the magnetic fluid to adhere to in the first clearance, the concave orientation that is equipped with of pole piece outer peripheral edge a recess of vibrating diaphragm.

As a further improved technical scheme of the utility model, the recess sets up to the several, several recess spaced set up in the pole piece outer peripheral edges.

As a further improved technical scheme of the utility model, the several even interval arrangement of recess is in the pole piece outer peripheral edges.

As the technical proposal of the further improvement of the utility model, the groove is concavely arranged at the joint of the upper surface and the outer side surface of the pole piece.

As the utility model discloses further modified technical scheme, the recess runs through from top to bottom the pole piece outer peripheral edges.

As the utility model discloses further modified technical scheme, the voice coil loudspeaker voice coil subassembly includes skeleton and voice coil loudspeaker voice coil, the skeleton encircles magnet, first clearance is located the skeleton with between the pole piece, the fixed cover of voice coil loudspeaker voice coil establish or convolute in the skeleton periphery.

As a further improved technical scheme of the utility model, the voice coil loudspeaker voice coil subassembly includes the ball top, the ball top clamp is located the vibrating diaphragm with between the skeleton.

As a modified technical scheme of the utility model, the vibrating diaphragm is including the main part that is located the intermediate position, encircle the book ring portion of main part and certainly the fixed part that the outer peripheral edges of book ring portion extend, the main part lower surface with ball crown fixed connection, the fixed part with basin frame fixed connection.

As a further improved technical scheme of the utility model, still including being located the yoke of basin frame bottom, the yoke holds bowl shape, the yoke upper edge with basin frame lower limb joint is in the same place, magnet fixed set up in the yoke.

As the utility model discloses further modified technical scheme, the voice coil loudspeaker voice coil subassembly with the second clearance has between the yoke, be stained with the magnetic fluid in the second clearance.

Compared with the prior art, the utility model discloses the concave at least recess that is equipped with towards the vibrating diaphragm of pole piece outer peripheral edge of speaker, the magnetic flux density of groove is lower around than, reduces the magnetic fluid adsorption capacity, avoids the magnetic circuit of speaker to produce airtight chamber, prevents to take place the resonance of airtight chamber itself, prevents that the acoustic curve from changing, avoids the peak value and the valley value outside the expectation of many, maintains good tone quality and the listening of speaker.

Drawings

Fig. 1 is a perspective view of the speaker of the present invention.

Fig. 2 is a sectional view of the speaker of the present invention.

Fig. 3 is an exploded perspective view of the speaker of the present invention.

Fig. 4 is a perspective view of a pole piece of the speaker of the present invention.

Fig. 5 is a perspective view of a pole piece of a speaker according to another embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 4, the present invention discloses a speaker 100, which includes a frame (housing) 10, a Yoke (Yoke)20, a diaphragm 30, a voice coil assembly, a magnet 70 and a pole piece 80, wherein the voice coil assembly includes a Dome 40, a voice coil 50 and a Bobbin 60.

The basin stand 10 is of a hollow tube structure, the magnet yoke 20 is bowl-shaped and is arranged at the bottom of the basin stand 10, and the upper edge of the magnet yoke 20 is jointed with the lower edge of the basin stand 10.

The diaphragm 30 includes a main body 31 at an intermediate position, a corrugated portion 32 surrounding the main body 31, and a fixing portion 33 extending from an outer peripheral edge of the corrugated portion 32. The main body 31 is fixedly connected with the dome 40, the dome 40 is sandwiched between the main body 31 and the frame 60, and the fixing portion 33 is fixedly connected with the frame 10.

The voice coil 50 is fixedly sleeved or wound on the periphery of one end of the framework 60, the other opposite end of the framework 60 is fixedly connected with the ball top 40, and the framework 60 is annular and made of high-temperature-resistant materials. The yoke 20 surrounds the coil 50 with a second gap therebetween, and the magnetic liquid 25 is adhered to the second gap.

Magnet 70 is fixed on yoke 20, pole piece 80 is disposed on the upper surface of magnet 70, the areas of both are substantially the same, voice coil 50 and bobbin 60 surround magnet 70 and pole piece 80, and a first gap is formed between magnet 70 and pole piece 80, and magnetic fluid 85 is also adhered in the first gap. The outer periphery of the pole piece 80 is provided with a plurality of arc-shaped grooves 82 facing the vibrating diaphragm 30, the grooves 82 are uniformly arranged at the outer periphery of the pole piece 80 at intervals, the grooves 82 are positioned at the connecting part of the upper surface and the side surface of the pole piece 80, the magnetic liquid 85 is usually concentrated at the higher magnetic flux position, the magnetic flux density at each groove 82 is lower than the surrounding, the adsorption quantity of the magnetic liquid 85 is reduced, a closed cavity is prevented from being generated in a magnetic circuit (between the vibrating diaphragm 30 and the framework 60 and the pole piece 80) of the loudspeaker 100, the resonance of the closed cavity is prevented, the change of an acoustic curve is prevented, the extra peak value and valley value are avoided, and the good tone quality and; the magnetic fluid 85 also enables the temperature of the voice coil 50 to be conducted to the pole piece 80 through the magnetic fluid 85, thereby generating a heat dissipation effect.

In the implementation mode, a ball top is omitted, and the coil or the framework is directly and fixedly connected with the lower surface of the vibrating diaphragm; and the framework is eliminated, the coil is directly and fixedly connected with the lower surface of the vibrating diaphragm, and the magnetic liquid is positioned in a gap between the coil and the pole piece.

Referring to fig. 5, in another embodiment of the present invention, the groove 82a on the pole piece 80a vertically penetrates through the outer periphery of the pole piece 80a, so as to reduce the magnetic flux at the groove 82a, and avoid the magnetic circuit of the speaker 100 from generating a closed cavity, which can also achieve the purpose of the present invention.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical people in the related art, for example, the descriptions of the directions such as "front", "back", "left", "right", "up", "down", etc., although the present specification has described the present invention in detail with reference to the above embodiments, the ordinary skilled in the art should understand that the technical people in the related art can still modify or substitute the present invention, and all the technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. The utility model provides a loudspeaker (100), its includes basin frame (10), vibrating diaphragm (30), voice coil assembly, magnet (70) and pole piece (80), vibrating diaphragm (30) with basin frame (10) voice coil assembly fixed connection, the voice coil assembly encircles magnet (70) with pole piece (80), pole piece (80) set up in magnet (70) upper surface, pole piece (80) with first clearance has between the voice coil assembly, be stained with magnetic fluid (85) in the first clearance, its characterized in that: the outer periphery of the pole piece (80) is concavely provided with at least one groove (82) facing the diaphragm (30).

2. The loudspeaker of claim 1, wherein: the grooves (82) are arranged into a plurality of grooves, and the grooves (82) are arranged on the outer periphery of the pole piece (80) at intervals.

3. A loudspeaker according to claim 2, wherein: the grooves (82) are uniformly arranged at intervals on the outer periphery of the pole piece (80).

4. A loudspeaker according to claim 2, wherein: the groove (82) is concavely arranged at the joint of the upper surface and the outer side surface of the pole piece (80).

5. A loudspeaker according to claim 2, wherein: the groove (82a) penetrates through the outer periphery of the pole piece (80a) up and down.

6. The loudspeaker of claim 1, wherein: the voice coil assembly comprises a framework (50) and a voice coil (60), the framework (50) surrounds the magnet (70), the first gap is located between the framework (50) and the pole pieces (80), and the voice coil (60) is fixedly sleeved or wound on the periphery of the framework (50).

7. The loudspeaker of claim 6, wherein: the voice coil assembly further comprises a ball top (40), and the ball top (40) is clamped between the vibrating diaphragm (30) and the framework (50).

8. The loudspeaker of claim 6, wherein: vibrating diaphragm (30) including be located intermediate position main part (31), encircle the book ring portion (32) of main part (31) and certainly book ring portion (32) outer peripheral edges fixed part (33) that extend, main part (31) lower surface with ball top (40) fixed connection, fixed part (33) with basin frame (10) fixed connection.

9. The loudspeaker of claim 1, wherein: still including being located yoke (20) of basin frame (10) bottom, yoke (20) are the calathiform, yoke (20) upper edge with basin frame (10) lower limb joint is in the same place, magnet (80) fixed set up in yoke (20).

10. The loudspeaker of claim 9, wherein: and a second gap is formed between the voice coil assembly and the magnetic yoke (20), and magnetic liquid (25) is adhered in the second gap.