Loudspeaker

Abstract

The present application relates to the technical field of electro-acoustic conversion. Provided is a loudspeaker. A magnetic circuit system of the loudspeaker of the present application comprises a lower clamping plate fixed to a frame, a central magnetic circuit fixed to the lower clamping plate, and a side magnetic circuit arranged around the central magnetic circuit and spaced apart from same to form a magnetic gap, wherein the side magnetic circuit comprises two first side magnetic units that are symmetrical and spaced apart from each other; each of the first side magnetic units comprises a first side magnetic steel piece fixed to the lower clamping plate, a first side pole core disposed on the side of the first side magnetic steel piece away from the lower clamping plate, and a second side magnetic steel piece disposed on the side of the first side pole core away from the first side magnetic steel piece; the first side magnetic steel piece and / or the second side magnetic steel piece comprise a first body portion and a first protruding portion extending from the first body portion in a direction away from the central magnetic circuit, with a first slot being formed between the first body portion and the first protruding portion. The space occupied by the side magnetic steel pieces can be reduced, thereby maximizing, under the condition of making full use of a vibration space, the volume of the magnetic steel pieces to enhance magnetic force.

Description

Loudspeaker TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic conversion, in particular to a loudspeaker. BACKGROUND

[0002] In recent years, information technology has developed rapidly, and the popularity rate of audio equipment is getting higher and higher. People's requirements for audio equipment are not only limited to the playing of video and audio, but also put forward more requirements for the reliability of audio equipment. Especially with the advent of the 3G era, mobile multimedia technology has also developed, and many audio equipment has various entertainment functions, such as video playing, digital video shooting, gaming, GPS navigation, etc. All of them require electronic components in the audio equipment to be more and more precise and compact. In the audio equipment, a micro sound generating device is a commonly used electronic component, mainly used for playing audio signals, and the structural design directly affects the audio playing quality.

[0003] The loudspeaker of the related art includes a vibration system and a magnetic circuit system. In the magnetic circuit system with a center magnetic steel and a side magnetic steel, the side magnetic steel usually adopts a regular shape, such as a flat strip shape, which occupies a large space and is not conducive to providing sufficient vibration space to optimize the performance of the loudspeaker.

[0004] Therefore, it is necessary to provide a new loudspeaker. TECHNICAL PROBLEM

[0005] The purpose of the present application is to provide a loudspeaker which can solve the problem that the existing side magnetic steel occupies a large space and is not conducive to providing sufficient vibration space to optimize the performance of the loudspeaker. TECHNICAL SOLUTION

[0006] The technical solution of the present application is as follows: a loudspeaker is provided, which includes a basket, a vibration system fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate and sound. The magnetic circuit system includes a lower clamping plate fixed to the basket, a center magnetic circuit fixed to the lower clamping plate, and a side magnetic circuit arranged around the center magnetic circuit and spaced from the center magnetic circuit to form a magnetic gap. The side magnetic circuit includes two symmetrically and spaced first side magnetic units. The first side magnetic unit includes a first side magnetic steel fixed to the lower clamping plate, a first side pole core arranged on the side of the first side magnetic steel away from the lower clamping plate, and a second side magnetic steel arranged on the side of the first side pole core away from the first side magnetic steel. The first side magnetic steel and / or the second side magnetic steel includes a first main body portion and a first protruding portion extending from the first main body portion away from the center magnetic circuit. A first cutting groove is formed between the first main body portion and the first protruding portion.

[0007] Preferably, when the first side magnetic steel and the second side magnetic steel each comprise a first body portion and a first protruding portion, the first protruding portion of the first side magnetic steel is attached to the lower clamping plate and the length of the first body portion of the first side magnetic steel is greater than or equal to the length of the first side pole core; the first protruding portion of the second side magnetic steel is attached to the first side pole core and the length of the first protruding portion of the second side magnetic steel is less than or equal to the length of the first side pole core.

[0008] Preferably, the side magnetic circuit further comprises two symmetrically and spaced apart second side magnetic units, each of which comprises a third side magnetic steel fixed to the lower clamping plate, a second side pole core arranged on the side of the third side magnetic steel away from the lower clamping plate, and a fourth side magnetic steel arranged on the side of the second side pole core away from the third side magnetic steel, the third side magnetic steel comprising a second body portion and a second protruding portion extending from the second body portion in a direction away from the center magnetic circuit, a second cut groove being formed between the second body portion and the second protruding portion, and a third cut groove being formed between the second side pole core and the fourth side magnetic steel.

[0009] Preferably, the second protruding portion of the third side magnetic steel is attached to the lower clamping plate and the length of the second body portion is greater than or equal to the length of the second side pole core.

[0010] Preferably, the yoke is rectangular, the two first side magnetic units are arranged opposite to each other along the short axis direction, and the two second side magnetic units are arranged opposite to each other along the long axis direction.

[0011] Preferably, the center magnetic circuit comprises a first center magnetic steel fixed to the lower clamping plate, a center pole core arranged on the side of the first center magnetic steel away from the lower clamping plate, and a second center magnetic steel arranged on the side of the center pole core away from the first center magnetic steel.

[0012] Preferably, the magnetic circuit system further comprises an upper clamping plate arranged opposite to the lower clamping plate, the upper clamping plate comprising a clamping plate body portion and an extension portion, the extension portion being annularly arranged on the clamping plate body portion, the clamping plate body portion being fixed to the center magnetic circuit, and the extension portion being fixed to the side magnetic circuit.

[0013] Preferably, the vibration system comprises a first diaphragm fixed to the yoke, a skeleton fixed to the first diaphragm, a voice coil fixed to the skeleton and inserted into the magnetic gap, a second diaphragm, a first connecting member connecting the skeleton and the second diaphragm, and a second connecting member connecting the second diaphragm and the upper clamping plate.

[0014] Preferably, the vibration system further comprises a flexible member fixed to the yoke and connected to the skeleton.

[0015] Preferably, the skeleton comprises a skeleton body part spaced apart from the first diaphragm, a holding part extending and fixed to the first diaphragm from the skeleton body part, and a support part symmetrically distributed on the side of the voice coil and used for supporting the voice coil; the support part and the holding part are surrounded to form a first cavity for accommodating the first edge magnetic unit and a second cavity for accommodating the second edge magnetic unit, and the skeleton body part, the holding part and the support part are surrounded to form a third cavity for accommodating the center magnetic circuit. Advantages

[0016] The application has the advantages that: the magnetic circuit system comprises a lower clamping plate fixed to the yoke, a center magnetic circuit fixed to the lower clamping plate, and an edge magnetic circuit annularly arranged on the center magnetic circuit and spaced apart from the center magnetic circuit to form a magnetic gap; the edge magnetic circuit comprises two symmetrically and spaced apart first edge magnetic units; the first edge magnetic unit comprises a first edge magnetic steel fixed to the lower clamping plate, a first edge pole core arranged on the side of the first edge magnetic steel away from the lower clamping plate, and a second edge magnetic steel arranged on the side of the first edge pole core away from the first edge magnetic steel; the first edge magnetic steel and / or the second edge magnetic steel comprises a first body part and a first protruding part extending from the first body part away from the center magnetic circuit, and a first cut groove is formed between the first body part and the first protruding part, which can reduce the occupied space of the edge magnetic steel, thereby increasing the vibration space of the vibration system, maximizing the volume of the magnetic steel to improve the magnetic force under the condition of fully utilizing the vibration space, and thereby improving the acoustic performance of the loudspeaker. BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is a perspective structural schematic view of a loudspeaker according to an embodiment of the application.

[0018] FIG. 2 is an exploded structural schematic view of the loudspeaker according to the embodiment of the application.

[0019] FIG. 3 is a sectional view of FIG. 1 along the A-A line.

[0020] FIG. 4 is a sectional view of FIG. 1 along the B-B line.

[0021] FIG. 5 is a partial enlarged structural schematic view of the C area in FIG. 3.

[0022] FIG. 6 is a partial enlarged structural schematic view of the D area in FIG. 4.

[0023] FIG. 7 is a structural schematic view of a skeleton according to an embodiment of the application.

[0024] FIG. 8 is an assembly structural schematic view of a magnetic circuit system and a skeleton according to an embodiment of the application. Embodiments of the application

[0025] The application will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Referring to FIGS. 1-3, the loudspeaker 100 of the embodiment of the application comprises a frame 10, a vibration system 20, and a magnetic circuit system 30.

[0027] The frame 10 is used to support the vibration system 20 and the magnetic circuit system 30, and the magnetic circuit system 30 has a magnetic gap 301 and is used to drive the vibration system 20 to vibrate and produce sound. In the embodiment, the frame 10 is in a rectangular shape.

[0028] Referring to FIGS. 2 and 3, the vibration system 20 comprises a first diaphragm 21 fixed to the frame 10, a skeleton 22 fixed to the first diaphragm 21, a voice coil 23 fixed to the skeleton 22 and inserted into the magnetic gap 301, a second diaphragm 24, a first connecting piece 25 connecting the skeleton 22 and the second diaphragm 24, and a second connecting piece 27 connecting the second diaphragm 24. When the loudspeaker 100 is powered on, the voice coil 23 vibrates under the action of the magnetic circuit system 30, thereby driving the first diaphragm 21 and the second diaphragm 24 to vibrate and produce sound.

[0029] Specifically, referring to FIGS. 2-6, the first diaphragm 21 comprises a first vibration part 211, a first folded ring part 212 extending from the periphery of the first vibration part 211, a first fixed part 213 extending outward from one side of the first folded ring part 212 away from the first vibration part 211, and a first through hole 201 penetrating the first vibration part 211 along the vibration direction of the first diaphragm 21. Among them, the first fixed part 213 is fixed to the frame 10, and the first vibration part 211 is fixed to the skeleton 22. The first folded ring part 212 is in an arc structure, and the side facing the magnetic circuit system 30 is protruding.

[0030] Specifically, referring to FIGS. 2-6, the second diaphragm 24 comprises a second vibration part 241, a second folded ring part 242 extending from the periphery of the second vibration part 241, a third folded ring part 243 extending from the periphery of the second folded ring part 242, a second fixed part 244 extending outward from one side of the third folded ring part 243 away from the second folded ring part 242, and a second through hole 204 penetrating the second vibration part 241 along the vibration direction of the second diaphragm 24. Among them, the second fixed part 244 is fixed to the first connecting piece 25, and the second vibration part 241 is fixed to the second connecting piece 27. The second folded ring part 242 and the third folded ring part 243 are in an arc structure, and the protruding directions of the second folded ring part 242 and the third folded ring part 243 are opposite. Specifically, the second folded ring part 242 protrudes toward the side facing the magnetic circuit system 30, and the third folded ring part 243 protrudes toward the side facing away from the magnetic circuit system 30.

[0031] Please refer to Fig. 2, the first connecting piece 25 has a third through hole 205 penetrating the first connecting piece 25 along the vibration direction, and the second connecting piece 27 has a fourth through hole 207 penetrating the second connecting piece 27 along the vibration direction.

[0032] Please refer to Fig. 1, Fig. 2, Fig. 5 and Fig. 6, when assembled, the first connecting piece 25 covers the first through hole 201, the second diaphragm 24 covers the third through hole 205, and the second connecting piece 27 covers the second through hole 204.

[0033] Please refer to Fig. 7, the skeleton 22 includes a skeleton main body part 221 spaced apart from the first diaphragm 21, a holding part 222 bent and extended from the skeleton main body part 221 to the first diaphragm 21 and fixed to the first diaphragm 21, and support parts 223 symmetrically distributed on the side of the voice coil 23 and used for supporting the voice coil 23; the support parts 223 and the holding part 222 surround to form a first cavity 2201 and a second cavity 2202, and the skeleton main body part 221, the holding part 222 and the support parts 223 surround to form a third cavity 2203.

[0034] In the embodiment, the voice coil 23 is in a rectangular structure with rounded corners, the skeleton 22 is in a rectangular shape, the support parts 223 are provided in four, distributed in four corners of the skeleton 22 and respectively fixed with the rounded corners of the voice coil 23 to support the voice coil 23. The first cavity 2201 extends along the long axis direction; the second cavity 2202 extends along the short axis direction.

[0035] Further, please refer to Fig. 2, the support parts 223 support the voice coil 23 through the buffer 28, avoiding friction between the support parts 223 and the voice coil 23 and damaging the voice coil 23.

[0036] Further, please refer to Fig. 2, the vibration system 20 further includes flexible pieces 26 fixed to the yoke 10 and connected to the skeleton 22, the number of the flexible pieces 26 is two and respectively located on opposite sides of the voice coil 23.

[0037] Please refer to Fig. 2-4 and Fig. 8, the magnetic circuit system 30 includes a lower clamp plate 31 fixed to the yoke 10, an upper clamp plate 34 oppositely arranged with the lower clamp plate 31, a center magnetic circuit 32 fixed to the lower clamp plate 31, and a side magnetic circuit 33 annularly arranged on the side of the center magnetic circuit 32 and spaced apart from the center magnetic circuit 32 to form a magnetic gap 301.

[0038] The lower clamp plate 31 can be used for magnetic conduction to improve the driving force. The lower clamp plate 31 fixes the center magnetic circuit 32 and the side magnetic circuit 33, and the side magnetic circuit 33 is annularly arranged on the side of the center magnetic circuit 32.

[0039] Please refer to FIG. 2-4, the upper clamp plate 34 includes an upper clamp plate main body part 341 and an extension part 342, the extension part 342 is annularly arranged on the upper clamp plate main body part 341, the extension part 342 includes oppositely arranged first and second surfaces 3421 and 3422, and the second connecting piece 27 is fixed to the first surface 3421. The upper clamp plate 34 is arranged on the fourth through hole 207 to fix the clamp plate main body part 341 to the center magnetic circuit 32, and the extension part 342 is fixed to the edge magnetic circuit 33.

[0040] Please refer to FIG. 3, 4 and 8, the center magnetic circuit 32 is accommodated in the third cavity 2203, and includes a first center magnetic steel 321 fixed to the lower clamp plate 31, a center pole core 322 arranged on a side of the first center magnetic steel 321 away from the lower clamp plate 31, and a second center magnetic steel 323 arranged on a side of the center pole core 322 away from the first center magnetic steel 321. The second center magnetic steel 323 is fixed to the upper clamp plate main body part 341.

[0041] Please refer to FIG. 2-4 and 8, the edge magnetic circuit 33 includes two symmetrically and spaced first edge magnetic units 331 and two symmetrically and spaced second edge magnetic units 332. The two first edge magnetic units 331 are spaced apart in the short axis direction, and the two second edge magnetic units 332 are spaced apart in the long axis direction. Specifically, please refer to FIG. 8, the first edge magnetic unit 331 is accommodated in the first cavity 2201, and the second edge magnetic unit 332 is accommodated in the second cavity 2202. The first edge magnetic unit 331 and the second edge magnetic unit 332 are fixed to the second surface 3422 of the extension part 342.

[0042] Specifically, please refer to FIG. 4 and 6, the first edge magnetic unit 331 includes a first edge magnetic steel 3311 fixed to the lower clamp plate 31, a first edge pole core 3312 arranged on a side of the first edge magnetic steel 3311 away from the lower clamp plate 31, and a second edge magnetic steel 3313 arranged on a side of the first edge pole core 3312 away from the first edge magnetic steel 3311; the first edge magnetic steel 3311 and / or the second edge magnetic steel 3313 includes a first main body part 3301 and a first protruding part 3302 extending from the first main body part 3301 away from the center magnetic circuit 32, and a first cut groove 3303 is formed between the first main body part 3301 and the first protruding part 3302. It can be understood that the first edge magnetic steel 3311 and / or the second edge magnetic steel 3313 is designed in an L shape. As an embodiment, the first edge magnetic steel 3311 is designed in an L shape; as an embodiment, the second edge magnetic steel 3313 is designed in an L shape; as an embodiment, the first edge magnetic steel 3311 and the second edge magnetic steel 3313 are both designed in an L shape. In this embodiment, the first edge magnetic steel 3311 and the second edge magnetic steel 3313 are both designed in an L shape, which can reduce the occupied space of the edge magnetic steel, thereby increasing the vibration space of the vibration system 20, and maximizing the volume of the magnetic steel to improve the magnetic force under the condition of fully utilizing the vibration space, thereby improving the acoustic performance of the loudspeaker 100.

[0043] When the first side magnetic steel 3311 and the second side magnetic steel 3313 both include the first body part 3301 and the first protruding part 3302, the first protruding part 3302 of the first side magnetic steel 3311 is attached to the lower clamping plate 31, and the length of the first body part 3301 of the first side magnetic steel 3311 is greater than or equal to the length of the first side pole core 3312; the first protruding part 3302 of the second side magnetic steel 3313 is attached to the first side pole core 3312, and the length of the first protruding part 3302 of the second side magnetic steel 3313 is less than or equal to the length of the first side pole core 3312. In this arrangement, the first side pole core 3312 supports the second side magnetic steel 3313, and the second side magnetic steel 3313 is fixed to the second surface 3422 of the extension part 342, which can improve the structural stability of the first side magnetic unit 331.

[0044] Specifically, referring to FIGS. 3 and 5, the second side magnetic unit 332 includes a third side magnetic steel 3321 fixed to the lower clamping plate 31, a second side pole core 3322 arranged on the side of the third side magnetic steel 3321 away from the lower clamping plate 31, and a fourth side magnetic steel 3323 arranged on the side of the second side pole core 3322 away from the third side magnetic steel 3321, the third side magnetic steel 3321 includes a second body part 3304 and a second protruding part 3305 extending from the second body part 3304 away from the center magnetic circuit 32, a second cut groove 3306 is formed between the second body part 3304 and the second protruding part 3305, and a third cut groove 3307 is formed between the second side pole core 3322 and the fourth side magnetic steel 3323. In this embodiment, the third side magnetic steel 3321 is designed in an L shape, and the layout structure of the second side pole core 3322 and the fourth side magnetic steel 3323 is also designed in an L shape, which can reduce the occupied space of the side magnetic steel, thereby increasing the vibration space of the vibration system 20, and maximizing the volume of the magnetic steel to improve the magnetic force under the condition of fully utilizing the vibration space, thereby improving the acoustic performance of the loudspeaker 100.

[0045] Further, the second protruding part 3305 of the third side magnetic steel 3321 is attached to the lower clamping plate 31, and the length of the second body part 3304 is greater than or equal to the length of the second side pole core 3322, the fourth side magnetic steel 3323 is supported by the second side pole core 3322, and the fourth side magnetic steel 3323 is fixed to the second surface 3422 of the extension part 342, which can improve the structural stability of the second side magnetic unit 332.

[0046] The above only describes the embodiments of the present application, and it should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present application, and these improvements are within the protection scope of the present application.

Claims

1. A loudspeaker comprising a basket, a vibration system fixed to the basket respectively, and a magnetic circuit system driving the vibration system to vibrate and sound, characterized in that, The magnetic circuit system comprises a lower clamp plate fixed to the yoke, a central magnetic circuit fixed to the lower clamp plate, and a side magnetic circuit arranged around the central magnetic circuit and spaced from the central magnetic circuit to form a magnetic gap.

2. The loudspeaker of claim 1, wherein: When the first side magnetic steel and the second side magnetic steel each comprise a first main body portion and a first protruding portion, the first protruding portion of the first side magnetic steel is attached to the lower clamp plate, and the length of the first main body portion of the first side magnetic steel is greater than or equal to the length of the first side pole core; the first protruding portion of the second side magnetic steel is attached to the first side pole core, and the length of the first protruding portion of the second side magnetic steel is less than or equal to the length of the first side pole core.

3. The loudspeaker of claim 1, wherein: The side magnetic circuit further comprises two symmetrically and spaced second side magnetic units, each comprising a third side magnetic steel fixed to the lower clamp plate, a second side pole core arranged on the side of the third side magnetic steel away from the lower clamp plate, and a fourth side magnetic steel arranged on the side of the second side pole core away from the third side magnetic steel, wherein the third side magnetic steel comprises a second main body portion and a second protruding portion extending from the second main body portion away from the central magnetic circuit, and a second cut groove is formed between the second main body portion and the second protruding portion, and a third cut groove is formed between the second side pole core and the fourth side magnetic steel.

4. The loudspeaker of claim 3, wherein: The second protruding portion of the third side magnetic steel is attached to the lower clamp plate, and the length of the second main body portion is greater than or equal to the length of the second side pole core.

5. The loudspeaker of claim 3, wherein: The yoke is rectangular, the two first side magnetic units are arranged opposite to each other along the short axis direction, and the two second side magnetic units are arranged opposite to each other along the long axis direction.

6. The loudspeaker of claim 1, wherein: The central magnetic circuit comprises a first central magnetic steel fixed to the lower clamp plate, a central pole core arranged on the side of the first central magnetic steel away from the lower clamp plate, and a second central magnetic steel arranged on the side of the central pole core away from the first central magnetic steel.

7. The loudspeaker of claim 1, wherein: The magnetic circuit system further comprises an upper clamp plate arranged opposite to the lower clamp plate, wherein the upper clamp plate comprises a clamp plate main body portion and an extension portion, the extension portion is arranged around the clamp plate main body portion, the clamp plate main body portion is fixed to the central magnetic circuit, and the extension portion is fixed to the side magnetic circuit.

8. The loudspeaker of claim 7, wherein: The vibration system comprises a first diaphragm fixed to the yoke, a skeleton fixed to the first diaphragm, a voice coil fixed to the skeleton and inserted into the magnetic gap, a second diaphragm, a first connecting member connecting the skeleton and the second diaphragm, and a second connecting member connecting the second diaphragm and the upper clamp plate.

9. The loudspeaker of claim 8, wherein: The vibration system further comprises a flexible member fixed to the yoke and connected to the skeleton.

10. The loudspeaker of claim 8, wherein: The skeleton comprises a skeleton body part arranged at a distance from the first diaphragm, a holding part extending from the skeleton body part to the first diaphragm and fixed to the first diaphragm, and support parts symmetrically distributed on the side of the voice coil and used for supporting the voice coil; the support parts and the holding part are arranged to form a first cavity for accommodating the first side magnetic unit and a second cavity for accommodating the second side magnetic unit, and the skeleton body part, the holding part and the support parts are arranged to form a third cavity for accommodating the center magnetic circuit.

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