Loudspeaker and loudspeaker box

Abstract

The present invention provides a loudspeaker, comprising a frame, a vibration system and a magnetic circuit system, wherein the vibration system comprises a diaphragm and a voice coil; the magnetic circuit system comprises a lower clamping plate, a main magnetic assembly and an auxiliary magnetic assembly; the main magnetic assembly comprises a first main magnetic steel piece, a main pole core and a second main magnetic steel piece; the auxiliary magnetic assembly comprises a first auxiliary magnetic steel piece, an auxiliary pole core and a second auxiliary magnetic steel piece; and the magnetic circuit system further comprises an upper clamping plate, the upper clamping plate comprising a first part fixed to the second main magnetic steel piece and a third part fixed to the second auxiliary magnetic steel piece. The loudspeaker further comprises a fixing ring, the fixing ring comprising a first connecting portion fixing the upper clamping plate and a second connecting portion fixing the diaphragm. Further provided is a loudspeaker box comprising the loudspeaker and an upper cover, wherein the upper cover comprises a body portion having a first through hole, and a steel sheet covering the first through hole; the steel sheet has a second through hole; and an inner peripheral edge of the steel sheet overlaps a step portion formed by a second part and the third part. The loudspeaker and loudspeaker box of the present invention have high magnetic circuit efficiency and a maximized magnetic circuit thickness.

Description

A loudspeaker and a loudspeaker box TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, and particularly relates to a loudspeaker and a loudspeaker box. BACKGROUND

[0002] With the development of electronic technology, portable consumer electronic devices are more and more pursued by people, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, etc. These electronic devices generally use voice for system feedback, such as incoming call prompts of mobile phones, navigation prompts, etc. These all use loudspeakers.

[0003] The loudspeaker of the related art comprises a shell, a basket, a vibration system and a magnetic circuit system received in the shell, the magnetic circuit system comprises a lower clamping plate, a main magnetic assembly disposed on the lower clamping plate and a secondary magnetic assembly disposed around the main magnetic assembly to form a magnetic gap, the main magnetic assembly and the secondary magnetic assembly usually only comprise a magnetic steel and a pole core attached to the magnetic steel, which results in low magnetic circuit efficiency of the loudspeaker; the vibration system comprises a diaphragm and a voice coil for driving the diaphragm to vibrate and sound, since the position of the diaphragm is relatively fixed with the magnetic circuit system, the position of the diaphragm is subject to the magnetic circuit system, and it is difficult to adjust the position of the diaphragm to meet different design requirements; in addition, the magnetic circuit system is received in the shell and is spaced apart from the shell, which increases the height of the entire loudspeaker and is not conducive to the miniaturization development of the loudspeaker.

[0004] Therefore, it is necessary to provide a new technical scheme to solve the above problems. TECHNICAL PROBLEM

[0005] The present application aims to provide a loudspeaker and a loudspeaker box with high magnetic circuit system efficiency and maximum magnetic circuit thickness. TECHNICAL SOLUTION

[0006] The technical scheme of the present application is as follows: a loudspeaker comprises a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to produce sound, the vibration system comprises a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate; the magnetic circuit system comprises a lower clamping plate fixed to the frame and spaced apart from the diaphragm, a main magnetic assembly placed on the lower clamping plate, and a secondary magnetic assembly arranged around the main magnetic assembly to form a magnetic gap, the voice coil is inserted into the magnetic gap, the main magnetic assembly comprises a first main magnetic steel placed on the lower clamping plate, a main pole core placed on the first main magnetic steel, and a second main magnetic steel placed on the main pole core, the secondary magnetic assembly comprises a first secondary magnetic steel placed on the lower clamping plate, a secondary pole core placed on the first secondary magnetic steel, and a second secondary magnetic steel placed on the secondary pole core; the magnetic circuit system further comprises an upper clamping plate arranged opposite to the lower clamping plate, the upper clamping plate comprises a first part fixed to the second main magnetic steel, a second part extending from the first part towards the lower clamping plate, and a third part extending from the second part away from the second main magnetic steel, the third part is fixed to the second secondary magnetic steel; the loudspeaker further comprises a fixing ring fixed to the upper clamping plate, the fixing ring comprises a first connecting part fixed to the upper clamping plate and a second connecting part formed by extending from the first connecting part towards the lower clamping plate, and an inner periphery of the diaphragm is fixed to the second connecting part.

[0007] Preferably, the diaphragm is arranged around the second secondary magnetic steel, and at least part of the diaphragm is located above the secondary pole core.

[0008] Preferably, the first connecting part is lapped on a step part formed by the second part and the third part, or the first connecting part is clamped between the third part and the second secondary magnetic steel.

[0009] Preferably, the vibration system comprises a skeleton fixed to the diaphragm and suspending the voice coil in the magnetic gap, the voice coil has a rectangular structure with rounded corners, the skeleton comprises a main body part spaced apart from the diaphragm, a fixed part bent and extended from the main body part towards the diaphragm and fixed to the diaphragm, and a support part formed by extending from a corner of the main body part towards the voice coil, the support part is fixed to the rounded corners of the voice coil to support the voice coil.

[0010] Preferably, the four groups of the auxiliary magnetic assemblies are arranged at four sides of the main magnetic assembly respectively, each group of the auxiliary magnetic assemblies is arranged between the corresponding two support parts, the main magnetic assembly and the auxiliary magnetic assembly are magnetized along the vibration direction of the vibration system, the magnetization directions of the first main magnetic steel and the second main magnetic steel are opposite, the magnetization directions of the first auxiliary magnetic steel and the second auxiliary magnetic steel are opposite, and the magnetization directions of the first main magnetic steel and the first auxiliary magnetic steel are opposite.

[0011] Preferably, the material of the fixing ring is metal nickel.

[0012] The application further provides a loudspeaker box, which comprises a top cover, a bottom cover which together with the top cover forms a receiving cavity, and a loudspeaker as described above, the top cover comprises a body part which is matched with the bottom cover, the loudspeaker is fixed to the body part, the body part is formed with a first through hole which is arranged correspondingly to the loudspeaker, the top cover further comprises a steel sheet which is fixed to the body part and covers the first through hole, the steel sheet is provided with a second through hole, and the inner periphery of the steel sheet is overlapped on the step part formed by the second part and the third part.

[0013] Preferably, the upper surface of the steel sheet is flush with the upper surface of the first part.

[0014] Preferably, the body part is further provided with a receiving groove which is recessed from the upper surface of the body part, the steel sheet is received in the receiving groove, and the upper surface of the steel sheet is flush with the upper surface of the body part.

[0015] Preferably, the diaphragm and the steel sheet form a front cavity of the loudspeaker box. Advantages

[0016] Compared with the related art, the main magnetic assembly of the loudspeaker provided by the application comprises a first main magnetic steel placed on the lower clamp plate, a main pole core placed on the first main magnetic steel, and a second main magnetic steel placed on the main pole core, and the auxiliary magnetic assembly comprises a first auxiliary magnetic steel placed on the lower clamp plate, an auxiliary pole core placed on the first auxiliary magnetic steel, and a second auxiliary magnetic steel placed on the auxiliary pole core. The arrangement of the top magnetic circuit can increase the magnetic field strength of the magnetic gap, improve the driving force of the voice coil, and thus greatly improve the BL value (i.e. the magnetic force value, which is the product of the magnetic flux density B and the length L of the voice coil) of the voice coil and increase the magnetic circuit efficiency. The diaphragm is fixed to the magnetic circuit system through the fixing ring, the height of the diaphragm can be adjusted through the fixing ring, and the influence of the dimensional tolerance during assembly on the concentricity of the diaphragm can be optimized. The loudspeaker box provided by the application is provided with a steel sheet having a second through hole on the upper cover, so that part of the upper clamp plate is embedded in the second through hole of the steel sheet, and the steel sheet is lapped on the stepped portion formed by the second portion and the third portion of the upper clamp plate. This not only optimizes the thickness of the magnetic circuit system and the vibration space of the loudspeaker, but also enables the steel sheet to support the magnetic circuit system and improve the drop strength. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a perspective view of the loudspeaker box provided by the application;

[0018] Fig. 2 is a sectional view along line A-A in Fig. 1;

[0019] Fig. 3 is a perspective exploded view of the loudspeaker box provided by the application;

[0020] Fig. 4 is an enlarged view of region B in the sectional view shown in Fig. 2;

[0021] In the drawings: loudspeaker 100, loudspeaker box 200, upper cover 11, body portion 111, first through hole 111a, receiving groove 111b, steel sheet 112, second through hole 112a, lower cover 12, receiving cavity 13, yoke 20, vibration system 30, diaphragm 31, voice coil 32, skeleton 33, main body portion 331, fixing portion 332, support portion 333, flexible member 34, magnetic circuit system 40, lower clamp plate 41, main magnetic assembly 42, first main magnetic steel 421, main pole core 422, second main magnetic steel 423, auxiliary magnetic assembly 43, first auxiliary magnetic steel 431, auxiliary pole core 432, second auxiliary magnetic steel 433, upper clamp plate 44, first portion 441, second portion 442, third portion 443, stepped portion 444, fixing ring 50, first connecting portion 51, second connecting portion 52. Embodiment of the application

[0022] The application will be further described below in conjunction with the drawings and embodiments.

[0023] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; for example, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It must be noted that as used herein the terms "approximately", "substantially", and "comprises" or grammatical variants thereof will be understood to allow for a certain level of deviation or variation, for example, as understood by one of ordinary skill in the art, and are used to describe various embodiments of the application as defined by the claims. Furthermore, the terms "comprise", "have" and "include" and variations thereof, as used herein, are intended to be open-ended and to mean including, but not limited to.

[0024] Referring to FIGS. 1-4, the loudspeaker 100 provided by the present application comprises a frame 20, a vibration system 30 fixed to the frame 20, and a magnetic circuit system 40 for driving the vibration system 30 to produce sound. The vibration system 30 comprises a diaphragm 31 fixed to the frame 20 and a voice coil 32 for driving the diaphragm 31 to vibrate. The magnetic circuit system 40 comprises a lower clamp plate 41 fixed to the frame 20 and spaced apart from the diaphragm 31, a main magnetic assembly 42 disposed on the lower clamp plate 41, and a secondary magnetic assembly 43 disposed around the main magnetic assembly 42 to form a magnetic gap, and the voice coil 32 is inserted into the magnetic gap.

[0025] Specifically, referring to FIGS. 2-3, the main magnetic assembly 42 comprises a first main magnetic steel 421 disposed on the lower clamp plate 41, a main pole core 422 disposed on the first main magnetic steel 421, and a second main magnetic steel 423 disposed on the main pole core 422; and the secondary magnetic assembly 43 comprises a first secondary magnetic steel 431 disposed on the lower clamp plate 41, a secondary pole core 432 disposed on the first secondary magnetic steel 431, and a second secondary magnetic steel 433 disposed on the secondary pole core 432. This top-to-top magnetic circuit structure can increase the magnetic field strength of the magnetic gap, thereby improving the driving force of the voice coil 32.

[0026] In order to increase the stability of the magnetic circuit system 40, referring to FIG. 2, the loudspeaker 100 provided by the present application further comprises an upper clamp plate 44 disposed opposite the lower clamp plate 41, the upper clamp plate 44 comprising a first portion 441 fixed to the second main magnetic steel 423, a second portion 442 extending from the first portion 441 towards the lower clamp plate 41, and a third portion 443 extending from the second portion 442 away from the second main magnetic steel 423, the third portion 443 being fixed to the second secondary magnetic steel 433; the first portion 441 is farther away from the lower clamp plate 44 than the third portion 443, which can make the thickness of the main magnetic assembly 42 larger and the magnetic circuit efficiency higher; the main magnetic assembly 42 and the secondary magnetic assembly 43 are clamped between the upper clamp plate 44 and the lower clamp plate 41, which can fix the magnetic circuit system 40 during the sound production process of the loudspeaker 100, and is conducive to the stability and reliability of the loudspeaker 100, and can significantly improve the acoustic performance and service life of the loudspeaker 100.

[0027] In order to further improve the stability of the magnetic circuit system 40 and improve the vibration space of the vibration system 30, referring to Fig. 2, the loudspeaker 100 provided by the present application further comprises a fixing ring 50 which is arranged around and fixed to the upper clamping plate 44, the fixing ring 50 comprises a first connecting part 51 which is fixed to the upper clamping plate 44 and a second connecting part 52 which is formed by extending from the first connecting part 51 towards the lower clamping plate 41, and the inner periphery of the diaphragm 31 is fixed to the second connecting part 52. In this way, the diaphragm 31 is connected to the magnetic circuit system 40 through the fixing ring 50, which not only can adjust the height of the diaphragm 31, but also can optimize the influence of the size tolerance during assembly on the concentricity of the diaphragm 31. In actual application, the first connecting part 51 can be overlapped on the stepped part 444 formed by the second part 442 and the third part 443, or the first connecting part 51 can be clamped between the third part 443 and the second auxiliary magnetic steel 433, and the height of the fixing ring 50 can be adjusted according to actual needs, so that the height of the diaphragm 31 can be flexibly adjusted according to the arrangement of the vibration system 30 and the magnetic circuit system 40, the vibration space of the vibration system 30 can be better designed, and the acoustic performance of the loudspeaker 100 can be improved.

[0028] Optionally, in order to provide a larger vibration space for the vibration system 30, referring to Fig. 2, the second auxiliary magnetic steel 433 is fixed to the partial auxiliary pole core 432, that is, the diaphragm 31 is arranged around the second auxiliary magnetic steel 433, and at least part of the diaphragm 31 is located above the auxiliary pole core 432, so that better vibration effect is achieved under the premise of ensuring high magnetic circuit efficiency of the magnetic circuit system 40.

[0029] Specifically, referring to Fig. 3, the vibration system 30 provided by the present application further comprises a skeleton 33 which is fixed to the diaphragm 31 and suspends the voice coil 32 in the magnetic gap, the voice coil 32 has a rectangular structure with rounded corners, the skeleton 33 comprises a main body part 331 which is arranged in a spaced manner with the diaphragm 31, a fixing part 332 which is bent and extended from the main body part 331 towards the diaphragm 31 and is fixed to the diaphragm 31, and a supporting part 333 which is formed by extending from the corner of the main body part 331 towards the voice coil 32, and the supporting part 333 is fixed to the rounded corner of the voice coil 32 to support the voice coil 32. The vibration system 30 further comprises a flexible piece 34 which is fixed to the basket 20 and connected to the skeleton 33, and the number of the flexible pieces 34 is two and they are respectively located on opposite sides of the voice coil 32.

[0030] Further, referring to Figs. 3-4, the four groups of the auxiliary magnetic assemblies 43 are arranged at the four sides of the main magnetic assembly 42, and each group of the auxiliary magnetic assemblies 43 is arranged between the corresponding two support portions 333; the main magnetic assembly 42 and the auxiliary magnetic assembly 43 are magnetized along the vibration direction of the vibration system 30, and the magnetization directions of the first main magnetic steel 421 and the second main magnetic steel 423 are opposite, the magnetization directions of the first auxiliary magnetic steel 431 and the second auxiliary magnetic steel 433 are opposite, and the magnetization directions of the first main magnetic steel 421 and the first auxiliary magnetic steel 431 are opposite. That is, the magnetic circuit system 40 provided by the application is a five-group magnetic circuit structure with opposite top, which can better increase the magnetic field strength of the magnetic gap and improve the driving force of the voice coil 32.

[0031] Preferably, the material of the fixing ring 50 is metal nickel, and the hardness of the metal nickel is greater than the hardness of the diaphragm 31, which can better support the diaphragm 31.

[0032] Further, referring to Figs. 2-3, the application provides a loudspeaker box 200, which comprises a top cover 11, a bottom cover 12 surrounding a receiving cavity 13 together with the top cover 11, and the loudspeaker 100 as described above. The top cover 11 comprises a body portion 111 matched with the bottom cover 12, the loudspeaker 100 is fixed to the body portion 111, the body portion 111 is formed with a first through hole 111a corresponding to the loudspeaker 100, and the top cover 11 further comprises a steel sheet 112 fixed to the body portion 111 and covering the first through hole 111a, the steel sheet 112 is provided with a second through hole 112a, and the inner periphery of the steel sheet 112 is lapped on the stepped portion 444 formed by the second portion 442 and the third portion 443. The first portion 441 of the upper clamping plate 44 is embedded in the second through hole 112a of the steel sheet 112, so as to reduce the overall thickness of the loudspeaker box 200. Since the steel sheet 112 has high strength, a thinner thickness can provide better support strength compared to ordinary materials, thereby further increasing the stability of the magnetic circuit system 40 and improving the drop strength, and optimizing the thickness of the magnetic circuit system 40 and the vibration space of the loudspeaker 100.

[0033] Further, the upper surface of the steel sheet 112 is flush with the upper surface of the first portion 441, and the diaphragm 31 is spaced apart from the steel sheet 112 to form a front cavity of the loudspeaker box 200.

[0034] Further, the body portion 111 is further provided with a receiving groove 111b recessed from the upper surface of the body portion 111, the steel sheet 112 is received in the receiving groove 111b, and the upper surface of the steel sheet 112 is flush with the upper surface of the body portion 111.

[0035] Compared with the related art, the main magnetic assembly of the loudspeaker provided by the application comprises a first main magnetic steel placed on a lower clamping plate, a main pole core placed on the first main magnetic steel, and a second main magnetic steel placed on the main pole core; the auxiliary magnetic assembly comprises a first auxiliary magnetic steel placed on the lower clamping plate, an auxiliary pole core placed on the first auxiliary magnetic steel, and a second auxiliary magnetic steel placed on the auxiliary pole core; the arrangement of the top magnetic circuit can increase the magnetic field strength of the magnetic gap, improve the driving force of the voice coil, greatly improve the BL value of the voice coil, and increase the magnetic circuit efficiency. The diaphragm is fixed to the magnetic circuit system through the fixing ring, the height of the diaphragm can be adjusted through the fixing ring, and the influence of the size tolerance on the concentricity of the diaphragm during assembly can be optimized. The loudspeaker box provided by the application is provided with a steel sheet with a second through hole on the upper cover, so that part of the upper clamping plate is embedded in the second through hole of the steel sheet, and the steel sheet is lapped on the step part formed by the second part and the third part of the upper clamping plate, which not only optimizes the thickness of the magnetic circuit system and the vibration space of the loudspeaker, but also enables the steel sheet to support the magnetic circuit system and improve the drop strength.

[0036] The above is only an embodiment of the application, and it should be pointed out that those skilled in the art can make improvements without departing from the inventive concept, and these improvements are within the protection scope of the application.

Claims

1. A loudspeaker comprising a basket, a vibrating system fixed to the basket, and a magnetic circuit system driving the vibrating system to produce sound, the vibrating system comprising a diaphragm fixed to the basket and a voice coil driving the diaphragm to vibrate; the magnetic circuit system comprising a lower clamp fixed to the basket and spaced apart from the diaphragm, a main magnetic assembly placed on the lower clamp, and a secondary magnetic assembly arranged around the main magnetic assembly to form a magnetic gap, the voice coil being inserted into the magnetic gap, characterized in that, The main magnetic assembly comprises a first main magnetic steel arranged on the lower clamping plate, a main pole core arranged on the first main magnetic steel, and a second main magnetic steel arranged on the main pole core; the auxiliary magnetic assembly comprises a first auxiliary magnetic steel arranged on the lower clamping plate, an auxiliary pole core arranged on the first auxiliary magnetic steel, and a second auxiliary magnetic steel arranged on the auxiliary pole core; the magnetic circuit system further comprises an upper clamping plate arranged opposite to the lower clamping plate, the upper clamping plate comprises a first part fixed to the second main magnetic steel, a second part extending from the first part towards the lower clamping plate, and a third part extending from the second part away from the second main magnetic steel, and the third part is fixed to the second auxiliary magnetic steel; the loudspeaker further comprises a fixing ring fixed to the upper clamping plate, the fixing ring comprises a first connecting part fixed to the upper clamping plate and a second connecting part formed by extending from the first connecting part towards the lower clamping plate, and the inner periphery of the diaphragm is fixed to the second connecting part.

2. The loudspeaker of claim 1, wherein, The diaphragm is arranged around the second auxiliary magnetic steel, and at least part of the diaphragm is located above the auxiliary pole core.

3. The loudspeaker of claim 1, wherein, The first connecting part is lapped on the stepped part formed by the second part and the third part, or the first connecting part is clamped between the third part and the second auxiliary magnetic steel.

4. The loudspeaker of claim 1, wherein, The vibration system comprises a skeleton fixed to the diaphragm and suspending the voice coil in the magnetic gap, the voice coil has a rectangular structure with rounded corners, the skeleton comprises a main body part arranged spaced apart from the diaphragm, a fixed part bent and extending from the main body part towards the diaphragm and fixed to the diaphragm, and a support part formed by extending from the corner of the main body part towards the voice coil, and the support part is fixed to the rounded corner of the voice coil to support the voice coil.

5. The loudspeaker of claim 4, wherein, The auxiliary magnetic assembly has four groups, and each group of the auxiliary magnetic assembly is arranged between the corresponding two support parts, the main magnetic assembly and the auxiliary magnetic assembly are magnetized along the vibration direction of the vibration system, the magnetization directions of the first main magnetic steel and the second main magnetic steel are opposite, the magnetization directions of the first auxiliary magnetic steel and the second auxiliary magnetic steel are opposite, and the magnetization directions of the first main magnetic steel and the first auxiliary magnetic steel are opposite.

6. The loudspeaker of claim 1, wherein, The material of the fixing ring is metal nickel.

7. A loudspeaker enclosure, characterised in that, The loudspeaker comprises an upper cover, a lower cover surrounding a receiving cavity together with the upper cover, and the loudspeaker as claimed in any one of claims 1-6, the upper cover comprises a body part matched with the lower cover, the loudspeaker is fixed to the body part, the body part is formed with a first through hole corresponding to the loudspeaker, the upper cover further comprises a steel sheet fixed to the body part and covering the first through hole, the steel sheet is provided with a second through hole, and the inner periphery of the steel sheet is lapped on the stepped part formed by the second part and the third part.

8. The loudspeaker enclosure of claim 7, wherein, The upper surface of the steel sheet is flush with the upper surface of the first part.

9. The loudspeaker enclosure of claim 7, wherein, The body part is further provided with a receiving groove recessed from the upper surface of the body part, the steel sheet is received in the receiving groove, and the upper surface of the steel sheet is flush with the upper surface of the body part. The body part is further provided with a receiving groove recessed from the upper surface of the body part, the steel sheet is received in the receiving groove, and the upper surface of the steel sheet is flush with the upper surface of the body part.

10. The loudspeaker enclosure of claim 7, wherein, The diaphragm and the steel sheet form a front cavity of the speaker box.

Images