Loudspeaker

Abstract

The present application relates to the technical field of electro-acoustic conversion, and provides a loudspeaker. In the loudspeaker of the present application, a yoke and a basket are connected by means of an elastic connecting member to support vibration of a magnetic circuit system; a diaphragm, the yoke, the basket, and the elastic connecting member sealingly define a rear cavity; the vibration direction of the magnetic circuit system is opposite to that of a vibration system; an upper housing and a lower housing are respectively fixed on opposite sides of the basket; the upper housing, the diaphragm, and the basket define a first front cavity for sound output, and the lower housing, the yoke, and the basket define a second front cavity for sound output, thereby achieving dual-sided sound output of the loudspeaker, and improving sound output sensitivity. Vibration of the magnetic circuit system and vibration of the vibration system together form two suspension systems, which undergo interacting forces in opposite directions, thereby reducing force exerted when the loudspeaker is connected to a terminal device for use, providing a certain vibration damping effect, and thus avoiding the problem of housing vibration.

Description

Loudspeaker TECHNICAL FIELD

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

[0002] With the advent of the mobile Internet era, the number of smart mobile devices is rising. Among the many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. However, for the current mobile phone loudspeaker, when the excitation voltage is large, the shell vibration phenomenon is often very serious, which brings a bad experience to the user. At the same time, the improvement of frequency response sensitivity has always been the pursuit of micro loudspeakers.

[0003] Therefore, it is necessary to provide a new loudspeaker to solve the above technical problems. TECHNICAL PROBLEM

[0004] The purpose of the present application is to provide a loudspeaker with high reliability and good user experience. TECHNICAL SOLUTION

[0005] The technical scheme of the present application is as follows:

[0006] The present application provides a loudspeaker, which comprises a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and sound, the vibration system comprising a diaphragm fixed to the frame, the magnetic circuit system comprising a magnetic yoke supported and fixed to the frame, the loudspeaker further comprising an elastic connecting piece connecting the magnetic yoke and the frame to support the vibration of the magnetic circuit system, the diaphragm, the magnetic yoke, the frame and the elastic connecting piece being sealed to form a rear cavity; the vibration direction of the magnetic circuit system and the vibration system is opposite; the loudspeaker further comprises an upper housing and a lower housing fixed to opposite sides of the frame, respectively, the upper housing, the diaphragm and the frame being surrounded to form a first front cavity for sound output, and the lower housing, the magnetic yoke and the frame being surrounded to form a second front cavity for sound output.

[0007] Preferably, the upper housing is provided with a first sound outlet for communicating the first front cavity with the outside, the lower housing is connected with the upper housing, and a second sound outlet for communicating the second front cavity with the outside is formed between the upper housing and the lower housing.

[0008] Preferably, the elastic connecting piece comprises a first fixed part connected with the magnetic yoke, an elastic part extended by bending the periphery of the first fixed part, and a second fixed part extended by bending away from the first fixed part on the side away from the first fixed part; the second fixed part is connected with the frame.

[0009] Preferably, the elastic connecting member is made of one or more of single-damping material, polymer composite damping material and metal composite damping structure.

[0010] Preferably, the magnetic circuit system comprises a main magnetic steel fixed to the magnetic yoke, a secondary magnetic steel spaced apart from the main magnetic steel and forming a magnetic gap, and a main pole plate covering a side of the main magnetic steel away from the magnetic yoke; the main magnetic steel is penetrated at the center to form a first cavity, the main pole plate is penetrated at the center to form a second cavity, and the first cavity and the second cavity are in communication; the magnetic circuit system further comprises a magnetic assembly at least partially accommodated in the first cavity, and a connecting member connecting the magnetic assembly and the diaphragm through the second cavity.

[0011] The magnetic yoke is penetrated at the center to form an opening, and the first cavity, the second cavity and the opening are coaxially arranged.

[0012] Preferably, the magnetic assembly comprises a first magnetic component accommodated in the first cavity and connected to a side of the connecting member away from the diaphragm.

[0013] Preferably, the magnetic assembly further comprises a second magnetic component fixed to the magnetic yoke and arranged in the first cavity; the second magnetic component is penetrated to form a third cavity, and the third cavity is coaxially arranged with the second cavity; the first magnetic component is accommodated in the third cavity and spaced apart from the second magnetic component.

[0014] Preferably, the connecting member is made of non-magnetic conductive material.

[0015] Preferably, the first magnetic component is a magnetic steel, and the second magnetic component is a magnetic steel or a magnetic conductive component or a structure formed by alternately stacking magnetic conductive material and non-magnetic conductive material.

[0016] Preferably, the yoke comprises a main body portion having an accommodation space and an extension portion accommodated in the accommodation space and extending from the main body portion, the magnetic yoke and the diaphragm are fixed to opposite ends of the yoke along the vibration direction of the vibration system, and the extension portion covers a side of the secondary magnetic steel away from the magnetic yoke. Advantages

[0017] The loudspeaker of the present application has the following beneficial effects: the loudspeaker of the present application connects the magnetic yoke and the basket through the elastic connecting piece to support the vibration of the magnetic circuit system, the back cavity is formed by sealing between the diaphragm, the magnetic yoke, the basket and the elastic connecting piece; the vibration directions of the magnetic circuit system and the vibration system are opposite; the upper shell and the lower shell are respectively fixed on the opposite sides of the basket, the first front cavity for sound output is formed by sealing between the upper shell, the diaphragm and the basket, the second front cavity for sound output is formed by sealing between the lower shell, the magnetic yoke and the basket, the loudspeaker realizes double-side sound emission, improves the sound emission sensitivity, the vibration of the magnetic circuit system and the vibration of the vibration system form two suspension systems together, the interaction force and the opposite force directions make the loudspeaker connected to the terminal equipment, the stress is reduced, a certain damping effect is achieved, and the shell vibration problem is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a perspective structural schematic view of the loudspeaker of the present application.

[0019] Fig. 2 is an exploded structural schematic view of the loudspeaker of the present application.

[0020] Fig. 3 is a kind of sectional view along A-A direction line of Fig. 1.

[0021] Fig. 4 is a partial enlarged structural schematic view of area B in Fig. 2.

[0022] Fig. 5 is a partial enlarged structural schematic view of area C in Fig. 3.

[0023] Fig. 6 is an assembly structural schematic view of the magnetic circuit system of the present application.

[0024] Fig. 7 is another kind of sectional view along A-A direction line of Fig. 1.

[0025] Fig. 8 is an assembly structural schematic view of the upper shell and the lower shell of the present application. Embodiment of the present application

[0026] The present application will be further described below in combination with the drawings and embodiments.

[0027] Please refer to Fig. 1-3, the loudspeaker 100 of the present application embodiment includes basket 10, vibration system 20, magnetic circuit system 30, elastic connecting piece 40, upper shell 50 and lower shell 60.

[0028] The basket 10 is used to support the vibration system 20 and the magnetic circuit system 30, the magnetic circuit system 30 has a magnetic gap 301, and the magnetic circuit system 30 is used to drive the vibration system 20 to vibrate and emit sound. In the present embodiment, the basket 10 is rectangular. The basket 10 includes a main body part 11 having a receiving space 101 and an extension part 12 received in the receiving space 101 and extending from the main body part 11.

[0029] Referring to FIG. 2, the vibration system 20 comprises a diaphragm 21 fixed on the basket 10, a skeleton 22 fixed on the diaphragm 21 towards the magnetic circuit system 30, and a voice coil 23 supported in the magnetic gap 301 through the skeleton 22. When the speaker 100 is powered on, the voice coil 23 interacts with the magnetic circuit system 30 to vibrate, thereby driving the diaphragm 21 to vibrate and emit sound.

[0030] Specifically, referring to FIG. 2 and FIG. 3, the diaphragm 21 comprises a vibrating part 211, a folded ring part 212 extending from the periphery of the vibrating part 211, a fixed part 213 extending outward from the side of the folded ring part 212 away from the vibrating part 211, a through hole 210 penetrating the vibrating part 211 along the vibrating direction of the diaphragm 21, and a dome 214 covering the through hole 210. The fixed part 213 is fixed to the basket 10 through the skeleton 22, and the folded ring part 212 is in an arc structure protruding towards the side away from the magnetic circuit system 30. In other embodiments, the diaphragm 21 can also not be provided with the through hole 210, and the dome 214 can be directly fixed to the diaphragm 21. The folded ring part 212 of the diaphragm 21 can also be provided as an arc structure protruding towards the side of the magnetic circuit system 30, which can be selected according to specific needs.

[0031] Referring to FIG. 2 and FIG. 3, the skeleton 22 is connected to the diaphragm 21 on the side away from the magnetic circuit system 30, and is connected to the voice coil 23 and the basket 10 on the side towards the magnetic circuit system 30. Specifically, the skeleton 22 comprises a first connecting part 221 for connecting the basket 10, a second connecting part 222 for connecting the voice coil 23, and a connecting arm 223 connecting the first connecting part 221 and the second connecting part 222, and the second connecting part 222 partially protrudes to form a cantilever 2221 on the side away from the first connecting part 221. The skeleton 22 can be a circuit board, and the voice coil 23 can be introduced with an electrical signal through the skeleton 22.

[0032] Referring to FIG. 2, FIG. 3 and FIG. 6, the magnetic circuit system 30 comprises a magnetic yoke 31 supported and fixed on the basket 10, a main magnetic steel 32 fixed on the magnetic yoke 31, a secondary magnetic steel 33 arranged in a spaced manner with the main magnetic steel 32 and forming a magnetic gap 301, and a main pole plate 34 covering the side of the main magnetic steel 32 away from the magnetic yoke 31.

[0033] Referring to FIG. 2, the main magnetic steel 32 penetrates to form a first cavity 320 at the center.

[0034] Referring to FIG. 2, the main pole plate 34 is used for magnetic conduction to improve driving force. The main pole plate 34 penetrates to form a second cavity 340 at the center, and the first cavity 320 and the second cavity 340 are in communication. Preferably, the first cavity 320 and the second cavity 340 are coaxially arranged.

[0035] Please refer to Fig. 3 and Fig. 6, the magnetic yoke 31 can be used for magnetic conduction to improve the driving force. The magnetic yoke 31 fixes the main magnetic steel 32 and the auxiliary magnetic steel 33, and the auxiliary magnetic steel 33 is arranged around the circumferential side of the main magnetic steel 32. The magnetic yoke 31 and the diaphragm 21 are fixed on the opposite ends of the suspension system 20 along the vibration direction of the suspension system 20, and the extension part 12 is arranged on the side of the auxiliary magnetic steel 33 away from the magnetic yoke 31. In the case that the extension part 12 is made of magnetic conductive material, the extension part 12 can be used as a magnetic conductive plate.

[0036] Further, please refer to Fig. 7, the magnetic yoke 31 is formed with a hole 310 at the center, and the first cavity 320, the second cavity 340 and the hole 310 are coaxially arranged. In this embodiment, the hole 310 is arranged at the center of the magnetic yoke 31, which can adjust the negative stiffness nonlinearity.

[0037] Further, please refer to Fig. 2, Fig. 3 and Fig. 6, the magnetic circuit system 30 further comprises a magnetic assembly 35 at least partially accommodated in the first cavity 320 and a connecting member 36 connecting the magnetic assembly 35 and the diaphragm 21 through the second cavity 340.

[0038] In this embodiment, please refer to Fig. 3, the magnetic assembly 35 and the connecting member 36 are added to the magnetic circuit system 30, and the magnetic assembly 35 and the ball top 214 are connected through the connecting member 36. When the diaphragm 21 is located at the initial position, the added magnetic assembly 35 and the electromagnetic assembly (including the main magnetic steel 32, the auxiliary magnetic steel 33 and the main pole plate 34) have zero force on the vibration area. During the vibration of the diaphragm 21, the force of the magnetic assembly 35 and the electromagnetic assembly on the vibration area is in the same direction as the vibration displacement of the vibration area, i.e. the loudspeaker 100 provides negative stiffness, improves the suspension amplitude of the suspension system 20 and the magnetic circuit system 30, and further increases the low-frequency sensitivity of the double-sided sound emission.

[0039] Please refer to Fig. 2 and Fig. 3, the magnetic assembly 35 comprises a first magnetic member 351 accommodated in the first cavity 320 and connected to the side of the connecting member 36 away from the diaphragm 21.

[0040] Please refer to Fig. 2, Fig. 3 and Fig. 6, the magnetic assembly 35 further comprises a second magnetic member 352 fixed to the magnetic yoke 31 and arranged in the first cavity 320; the second magnetic member 352 is formed with a third cavity 3520, and the third cavity 3520 is coaxially arranged with the second cavity 340; the first magnetic member 351 is accommodated in the third cavity 3520 and spaced apart from the second magnetic member 352.

[0041] Preferably, the first magnetic member 351 is a magnetic steel, the second magnetic member 352 is a magnetic steel or a magnetic conductive member or a structure formed by alternately stacking magnetic conductive material and non-magnetic conductive material. The connecting member 36 is made of non-magnetic conductive material.

[0042] In the embodiment, the second magnetic member 352 is arranged on the basis of the first magnetic member 351, so that the nonlinearity of the negative stiffness of the loudspeaker 100 can be further adjusted, and the negative stiffness is more symmetrical. Thus, the low-frequency frequency response of the loudspeaker 100 is improved, and the loudspeaker distortion is improved.

[0043] Please refer to FIG. 3 and FIG. 5, the elastic connecting member 40 is fixed to the magnetic yoke 31, the magnetic yoke 31 is connected to the basket 10 through the elastic connecting member 40, and the rear cavity 1001 is formed by sealingly surrounding the diaphragm 21, the magnetic yoke 31, the basket 10, and the elastic connecting member 40.

[0044] Specifically, please refer to FIG. 2-FIG. 5, the elastic connecting member 40 includes a first fixed connection part 41 connected to the magnetic yoke 31, an elastic part 42 bent and extended from the periphery of the first fixed connection part 41, and a second fixed connection part 43 bent and extended away from the first fixed connection part 41 from one side of the elastic part 42; the second fixed connection part 43 is connected to the basket 10. Wherein, the elastic part 42 can be provided as an arc-shaped structure protruding towards or away from the magnetic circuit system 30, or the cross section of the elastic part 42 can be W-shaped, C-shaped or S-shaped, which can be selected according to specific needs.

[0045] As an embodiment, please refer to FIG. 4 and FIG. 5, the elastic connecting member 40 includes a first fixed connection part 41, a first elastic part 421 bent and extended from the periphery of the first fixed connection part 41, a second elastic part 422 bent and extended away from the first fixed connection part 41 from one side of the first elastic part 421, and a second fixed connection part 43 bent and extended away from the second elastic part 422 from one side of the second elastic part 422. A through hole 401 is formed in the first fixed connection part 41, the first elastic part 421 and the second elastic part 422 are in a protruding arc-shaped structure, and as an embodiment, the protruding directions of the first elastic part 421 and the second elastic part 422 are opposite. For example, the first elastic part 421 protrudes away from the magnetic circuit system 30, and the second elastic part 422 protrudes towards the magnetic circuit system 30. The heights of the first fixed connection part 41, the first elastic part 421, the second elastic part 422, and the second fixed connection part 43 are in a stepped distribution in the vibration direction of the vibration system 20. The magnetic yoke 31 covers the through hole 401 and is connected to the first fixed connection part 41, and the second fixed connection part 43 is connected to the basket 10.

[0046] In the embodiment, the energized voice coil 23 interacts with the magnetic circuit system 30 to make the vibration system 20 vibrate and produce sound, at the same time, the magnetic circuit system 30 is suspended by the elastic connecting member 40, thus, the magnetic circuit system 30 generates vibration in the opposite direction of the vibration direction of the vibration system 20, the magnetic circuit system 30 and the vibration system 20 together form two suspension systems. And the excitation of the two suspension systems is the action and reaction of each other, so that the stress of the loudspeaker 100 connected to the terminal equipment is reduced, and a certain damping effect is achieved, thereby avoiding the shell vibration problem.

[0047] Further, referring to FIGS. 2, 3 and 8, the loudspeaker 100 further comprises an upper housing 50 and a lower housing 60 fixed to opposite sides of the frame 10 respectively, the upper housing 50 and the lower housing 60 are fixed to opposite sides of the frame 10 respectively, a first front cavity 1002 for sound output of the vibration system is formed between the upper housing 50, the diaphragm 21 and the frame 10, and a second front cavity 1003 for sound output generated by vibration of the magnetic yoke 31 is formed between the lower housing 60, the magnetic yoke 31 and the frame 10. Further, the upper housing 50 is provided with a first sound outlet 502 for communicating the first front cavity 1002 with the outside, the lower housing 60 is connected with the upper housing 50, and a second sound outlet 602 for communicating the second front cavity 1003 with the outside is formed between the upper housing 50 and the lower housing 60. In the embodiment, referring to FIG. 6, the upper housing 50 and the lower housing 60 are fixed to each other, so that the first sound outlet 502 and the second sound outlet 602 are combined after being connected to the terminal equipment, realizing double-sided sound production of the loudspeaker 100, reducing vibration and improving sound production sensitivity at the same time.

[0048] Further, the elastic connecting member 40 is made of one or more of a single-damping material, a polymer composite damping material and a metal composite damping structure.

[0049] It should be noted that the materials used by the elastic connecting member 40, such as the single-damping material, the polymer composite damping material and the metal composite damping structure, are all conventional materials used as elastic structures in the field, and the function of these materials is to adjust the damping elasticity.

[0050] The single-damping material is damping rubber and / or foamed foam. The elastic connecting member 40 is fixed to the frame 10 and the magnetic yoke 31 by the way of adhesive bonding. The damping rubber and the foamed foam are all conventional materials used as elastic structures in the field.

[0051] The metal composite damping structure is a high-damping metal and / or a constrained layer damping structure. When the elastic connecting piece 40 is the metal composite damping structure, the elastic connecting piece 40 is fixed to the yoke 31 and the basin frame 10 by means of glue bonding and / or electrothermal welding.

[0052] The high-molecular composite damping material is a particle-doped fiber-doped and / or laminated composite material. When the elastic connecting piece 40 is the high-molecular composite damping material, the elastic connecting piece 40 is fixed to the yoke 31 and the basin frame 10 by means of glue bonding and / or ultrasonic welding. The particle-doped fiber-doped and the laminated composite material are conventional materials used as elastic structures in the art.

[0053] The above is only an embodiment of the present application, and it should be pointed out that, for those skilled in the art, improvements can be made without departing from the inventive concept of the present application, but these all belong to 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, the vibration system comprising a diaphragm fixed to the basket, the magnetic circuit system comprising a yoke supporting a magnet fixed to the basket, characterized in that, The loudspeaker further comprises an elastic connecting piece connecting the magnetic yoke and the frame to support the magnetic circuit system to vibrate, the diaphragm, the magnetic yoke, the frame and the elastic connecting piece are sealed to form a back cavity; the vibration directions of the magnetic circuit system and the vibration system are opposite; the loudspeaker further comprises an upper shell and a lower shell fixed to opposite sides of the frame respectively, the upper shell, the diaphragm and the frame form a first front cavity for sound output, and the lower shell, the magnetic yoke and the frame form a second front cavity for sound output.

2. The loudspeaker of claim 1, wherein: The upper shell is provided with a first sound outlet for communicating the first front cavity with the outside, the lower shell is connected with the upper shell, and a second sound outlet for communicating the second front cavity with the outside is formed between the upper shell and the lower shell.

3. The loudspeaker of claim 1, wherein: The elastic connecting piece comprises a first fixed part connected with the magnetic yoke, an elastic part bent and extended from the periphery of the first fixed part, and a second fixed part bent and extended from one side of the elastic part away from the first fixed part; the second fixed part is connected with the frame.

4. The loudspeaker of claim 1, wherein: The elastic connecting piece is made of one or more of single-damping material, polymer composite damping material and metal composite damping structure.

5. The loudspeaker of claim 1, wherein: The magnetic circuit system comprises a main magnetic steel fixed to the magnetic yoke, a secondary magnetic steel spaced from the main magnetic steel to form a magnetic gap, and a main pole plate covering one side of the main magnetic steel away from the magnetic yoke; the main magnetic steel is penetrated at the center to form a first cavity, the main pole plate is penetrated at the center to form a second cavity, and the first cavity and the second cavity are communicated; the magnetic circuit system further comprises a magnetic assembly at least partially accommodated in the first cavity and a connecting piece connecting the magnetic assembly and the diaphragm through the second cavity.

6. The loudspeaker of claim 5, wherein: The magnetic yoke is penetrated at the center to form an opening, and the first cavity, the second cavity and the opening are coaxially arranged.

7. The loudspeaker of claim 5 or 6, wherein: The magnetic assembly comprises a first magnetic part accommodated in the first cavity and connected to one side of the connecting piece away from the diaphragm.

8. The loudspeaker of claim 7, wherein: The magnetic assembly further comprises a second magnetic part fixed to the magnetic yoke and arranged in the first cavity; the second magnetic part is penetrated to form a third cavity, and the third cavity is coaxially arranged with the second cavity; the first magnetic part is accommodated in the third cavity and spaced from the second magnetic part.

9. The loudspeaker of claim 5, wherein: The connecting piece is made of non-magnetic conductive material.

10. The loudspeaker of claim 8, wherein: The first magnetic part is a magnetic steel, and the second magnetic part is a magnetic steel or a magnetic conductive part or a structure formed by alternately stacking magnetic conductive material and non-magnetic conductive material.

11. The loudspeaker of claim 5, wherein: The frame comprises a main body part having an accommodation space and an extension part accommodated in the accommodation space and extending from the main body part, the magnetic yoke and the diaphragm are fixed to opposite ends of the frame along the vibration direction of the vibration system, and the extension part covers one side of the secondary magnetic steel away from the magnetic yoke.

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