Loudspeaker module

Abstract

The present invention provides a loudspeaker module, comprising a housing, and a sound production unit accommodated in the housing. The sound production unit comprises a basket, and a vibration system and a magnetic circuit system which are fixed to the basket. The magnetic circuit system comprises a magnetic yoke, and a main magnetic part supported on the magnetic yoke. The vibration system comprises a diaphragm. The sound production unit is further provided with a through hole penetrating through the magnetic yoke and the main magnetic part. The housing comprises a lower housing and an upper housing. The loudspeaker module further comprises a sealing ring connected to the main magnetic part and the lower housing. The diaphragm is ring shaped, an outer edge of the diaphragm being fixed to the basket, and an inner edge of the diaphragm being fixed to the main magnetic part and surrounding the sealing ring. The sound production unit further comprises a waterproof air-permeable film which is attached to the magnetic yoke and covers the side of the through hole close to the upper housing. The waterproof air-permeable film, the main magnetic part, the sealing ring, and the lower housing enclosingly form a resonant cavity. The diaphragm, the lower housing, and the sealing ring enclosingly form a front cavity. The sealing ring is provided with a resonant cavity channel placing the front cavity and the resonant cavity in communication. The loudspeaker module provided by the present invention can improve the high-frequency sensitivity and acoustic performance of a product.

Description

speaker module Technical Field

[0001] The present invention relates to the field of acoustic and electrical technology, and in particular to a speaker module. Background Art

[0002] With the development of science and technology, portable electronic products such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are widely used in people's daily lives. In these mobile electronic devices, voice playback devices are indispensable components. The quality of voice directly affects the user experience when using these mobile electronic devices. Therefore, the requirements for the speaker modules used in them are getting higher and higher.

[0003] In order to meet the requirements of miniaturization, speaker modules in related technologies often compress the volume of the front and rear cavities. This not only easily causes the diaphragm to become tympanic or deflated, but also results in low high-frequency sensitivity, seriously affecting the acoustic performance of the product.

[0004] Therefore, it is necessary to provide a product that solves the above problems. Technical issues

[0005] The object of the present invention is to provide a speaker module that improves the acoustic performance of the product while achieving miniaturization. Technical Solutions

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a speaker module, comprising a shell having a accommodating space and a sound-emitting unit accommodated in the accommodating space, the sound-emitting unit comprising a basin and a vibration system and a magnetic circuit system fixed to the basin, the magnetic circuit system comprising a yoke, a main magnetic part supported by the yoke, and a secondary magnetic part arranged around the main magnetic part to form a magnetic gap, the vibration system comprising a diaphragm and a voice coil driving the diaphragm to vibrate and produce sound, the voice coil being inserted in the magnetic gap, the sound-emitting unit further comprising a through hole penetrating the yoke and the main magnetic part, the shell comprising a lower shell and a cover The upper shell of the lower shell, the speaker module also includes a sealing ring connected to the main magnetic part and the lower shell, the diaphragm is annular, and the outer edge of the diaphragm is fixed to the basin frame, the inner edge of the diaphragm is fixed to the main magnetic part and surrounds the sealing ring, the sound unit also includes a waterproof and breathable membrane attached to the magnetic yoke and covering the through hole close to the side of the upper shell, the waterproof and breathable membrane, the main magnetic part, the sealing ring and the lower shell are arranged to form a resonant cavity, the diaphragm, the lower shell and the sealing ring are arranged to form a front cavity, and the sealing ring is provided with a resonant cavity channel connecting the front cavity and the resonant cavity.

[0007] Preferably, the main magnetic part includes an upper main magnetic steel and a lower main magnetic steel that are relatively arranged, and a main pole core clamped between the upper main magnetic steel and the lower main magnetic steel. The through hole passes through the magnetic yoke, the upper main magnetic steel, the lower main magnetic steel and the main pole core, and the sealing ring and the inner edge of the diaphragm are fixed to the lower main magnetic steel.

[0008] Preferably, the lower shell is further provided with a sound outlet located on the side of the speaker module, and the sound outlet is connected to the front cavity.

[0009] Preferably, the resonant cavity channel is arranged on a side of the sealing ring close to the sound outlet.

[0010] Preferably, the sealing ring includes a first end connected to the lower main magnetic steel and a second end connected to the lower shell, and the resonant cavity channel is formed by the second end being recessed toward the first end.

[0011] Preferably, the inner wall of the sound outlet is provided with a raised portion and a recessed portion which are adjacent to each other, and the raised portion is closer to the front cavity than the recessed portion.

[0012] Preferably, the upper shell, the sound-emitting unit and the lower shell are arranged to form a rear cavity, and the rear cavity is connected to the resonance cavity through the waterproof and breathable membrane.

[0013] Preferably, the magnetic yoke includes an upper surface close to the upper shell, the magnetic yoke is provided with a receiving groove recessed from the upper surface, and the waterproof breathable membrane is attached to the receiving groove and flush with the upper surface.

[0014] Preferably, the auxiliary magnetic part includes an auxiliary magnetic steel and an auxiliary pole core attached to the auxiliary magnetic steel, and the basin is fixed to the auxiliary pole core. Beneficial effects

[0015] The novel loudspeaker module of the present invention comprises a shell having a storage space and a sound-generating unit accommodated in the storage space, the sound-generating unit comprising a basin and a vibration system and a magnetic circuit system fixed to the basin, the magnetic circuit system comprising a yoke, a main magnetic portion supported by the yoke, and a secondary magnetic portion arranged around the main magnetic portion to form a magnetic gap, the vibration system comprising a diaphragm and a voice coil driving the diaphragm to vibrate and produce sound, the voice coil being inserted into the magnetic gap, the sound-generating unit further comprising a through hole penetrating the yoke and the main magnetic portion, the shell comprising a lower shell and an upper shell covering the lower shell , the speaker module also includes a sealing ring connected to the main magnetic part and the lower shell, the diaphragm is annular, and the outer edge of the diaphragm is fixed to the basin frame, the inner edge of the diaphragm is fixed to the main magnetic part and surrounds the sealing ring, the sound unit also includes a waterproof breathable membrane attached to the magnetic yoke and covering the through hole near the side of the upper shell, the waterproof breathable membrane, the main magnetic part, the sealing ring and the lower shell are arranged to form a resonant cavity, the diaphragm, the lower shell and the sealing ring are arranged to form a front cavity, and the sealing ring is provided with a resonant cavity channel connecting the front cavity and the resonant cavity. In the above structure, the opening of the resonant cavity can not only improve the high-frequency sensitivity and acoustic performance, but also eliminate the need to open a rear cavity leakage hole, saving space and reducing the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art in the art can also derive other drawings based on these drawings without inventive efforts. Among them:

[0017] FIG1 is a perspective view of a speaker module according to the present invention;

[0018] FIG2 is a cross-sectional view of the speaker module of the present invention along line AA in FIG1 ;

[0019] FIG3 is a perspective view of a sealing ring in the speaker module of the present invention. Modes for Carrying Out the Invention

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0021] 1-3 , the present invention provides a speaker module 100 , which includes a housing 1 having a receiving space 10 and a sound unit 2 received in the receiving space 10 .

[0022] The shell body 1 includes a lower shell 11 and an upper shell 12 covering the lower shell 11. The lower shell 11 is also provided with a sound outlet 111 located on the side of the speaker module. The inner wall of the sound outlet 111 is provided with a protrusion 111a and a recessed portion 111b adjacent to each other. The setting of the protrusion 111a and the recessed portion 111b can not only increase the sound output area and improve the smoothness of the sound output, but also prevent some dust and foreign matter from entering the speaker module.

[0023] The sound unit 2 includes a frame 21 and a vibration system 22 and a magnetic circuit system 23 fixed to the frame 21 .

[0024] The magnetic circuit system 23 includes a yoke 231, a main magnetic portion 232 supported by the yoke 231, and a secondary magnetic portion 233 arranged around the main magnetic portion 232 to form a magnetic gap 23a. The yoke 231 is used for magnetic shielding to prevent magnetic leakage and to fix the main magnetic portion 232 and the secondary magnetic portion 233. The main magnetic portion 232 includes an upper main magnetic steel 232a and a lower main magnetic steel 232b that are relatively arranged, and a main pole core 232c clamped between the upper main magnetic steel 232a and the lower main magnetic steel 232b. The secondary magnetic portion 233 includes a secondary magnetic steel 233a and a secondary pole core 233b attached to the secondary magnetic steel 233a. The basin 21 is fixed to the secondary pole core 233b.

[0025] The vibration system 22 includes a diaphragm 221 and a voice coil 222 that drives the diaphragm 221 to vibrate and produce sound. The voice coil 222 is inserted into the magnetic gap 23a between the main magnetic part 232 and the auxiliary magnetic part 233. When powered on, the voice coil 222 interacts with the magnetic circuit system 23 to drive the diaphragm 221 to produce sound.

[0026] The sound unit 2 is also provided with a through hole 24 that passes through the yoke 231 and the main magnetic part 232. The through hole 24 passes through the yoke 231, the upper main magnetic steel 232a, the lower main magnetic steel 232b and the main pole core 232c. The sealing ring 3 and the inner edge of the diaphragm 221 are fixed to the lower main magnetic steel 232b.

[0027] The speaker module 100 further includes a sealing ring 3 connected to the main magnetic part 232 and the lower shell 11 . The diaphragm 221 is annular, and the outer edge of the diaphragm 221 is fixed to the basin frame 21 , and the inner edge of the diaphragm 221 is fixed to the main magnetic part 232 and surrounds the sealing ring 3 .

[0028] The sound unit 2 also includes a waterproof and breathable membrane 25 attached to the yoke 231 and covering the side of the through hole 24 close to the upper shell 12. The yoke 231 includes an upper surface 231a close to the upper shell 12. The yoke 231 is provided with a receiving groove 231b recessed from the upper surface 231a. The waterproof and breathable membrane 25 is attached to the receiving groove 231b and is flush with the upper surface 231a of the yoke 231.

[0029] The waterproof and breathable membrane 25, the main magnetic part 232, the sealing ring 3 and the lower shell 11 are arranged to form a resonant cavity 101, and the diaphragm 221, the lower shell 11 and the sealing ring 3 are arranged to form a front cavity 102. The front cavity 102 is connected to the outside through the sound outlet 111, and the raised portion 111a of the sound outlet 111 is closer to the front cavity 102 than the recessed portion 111b.

[0030] Furthermore, the sealing ring 3 is provided with a resonant cavity channel 31 connecting the front cavity 102 and the resonant cavity 101. Please refer to Figure 3. The sealing ring 3 also includes a first end 32 connected to the lower main magnet 232b and a second end 33 connected to the lower shell 11. The resonant cavity channel 31 is formed by the second end 33 being recessed toward the first end 32. The resonant cavity channel 31 is arranged on a side of the sealing ring 3 close to the sound outlet 111. The sound outlet 111 is connected to the front cavity 102, and the resonant cavity 101 is connected to the outside world via the resonant cavity channel 31 and the front cavity 102.

[0031] Furthermore, the resonance cavity 101 is connected to the front cavity 102 through the resonance cavity channel 31, and the upper shell 12, the sound-emitting unit 2 and the lower shell 11 are surrounded by a rear cavity 103, and the rear cavity 103 is connected to the resonance cavity 101 through a waterproof breathable membrane 25; when the vibration system 22 vibrates and makes a sound, part of the high-frequency sound segment enters the resonance cavity 101 through the resonance cavity channel 31 and resonates, thereby improving the high-frequency sensitivity of the product; the rear cavity 103 is connected to the outside world through the waterproof breathable membrane 25, the resonance cavity 101, the resonance cavity channel 31, the front cavity 102 and the sound outlet 111. Such a design can not only keep the air pressure in the rear cavity consistent with the external air pressure, prevent the diaphragm from having a tympanic membrane or a deflated membrane phenomenon, and affect the acoustic performance of the product, but also eliminate the need to open a rear cavity leakage hole during the production process, saving space and reducing processes.

[0032] Compared with related technologies, the present invention improves the high-frequency sensitivity of the product and gives it excellent acoustic performance by opening a resonant cavity, while also balancing the back cavity air pressure with the external air pressure, without the need to open a back cavity leakage hole, saving space and reducing the number of processes.

[0033] The above description is merely an embodiment of the present invention. It should be pointed out that a person skilled in the art in the field of the present invention may make improvements without departing from the inventive concept of the present invention, but these improvements shall all fall within the scope of protection of the present invention.

Claims

1. A loudspeaker module, comprising a housing having an accommodation space and a sounding unit received in the accommodation space. The sounding unit includes a chassis, a vibration system fixed to the chassis, and a magnetic circuit system. The magnetic circuit system includes a yoke, a main magnetic part supported by the yoke, and a sub-magnetic part disposed around the main magnetic part to form a magnetic gap. The vibration system includes a diaphragm and a voice coil for driving the diaphragm to vibrate and generate sound. The voice coil is inserted into the magnetic gap, characterized in that, The sounding element is further provided with a through hole penetrating through the yoke and the main magnetic part. The housing includes a lower housing and an upper housing covering the lower housing. The speaker module further includes a sealing ring connected between the main magnetic part and the lower housing. The diaphragm is annular, and the outer edge of the diaphragm is fixed to the chassis. The inner edge of the diaphragm is fixed to the main magnetic part and surrounds the sealing ring. The sounding element further includes a waterproof and breathable film attached to the yoke and covering the side of the through hole close to the upper housing. The waterproof and breathable film, the main magnetic part, the sealing ring, and the lower housing enclose a resonance cavity. The diaphragm, the lower housing, and the sealing ring enclose a front cavity. The sealing ring is provided with a resonance cavity channel communicating the front cavity with the resonance cavity.

2. The loudspeaker module according to claim 1, wherein: The main magnetic part includes an upper main magnetic steel and a lower main magnetic steel which are oppositely arranged, and a main pole core sandwiched between the upper main magnetic steel and the lower main magnetic steel. The through hole penetrates through the yoke, the upper main magnetic steel, the lower main magnetic steel, and the main pole core. The sealing ring and the inner edge of the diaphragm are fixed to the lower main magnetic steel.

3. The loudspeaker module according to claim 1, wherein: The lower housing is further provided with a sound outlet on the side of the speaker module. The sound outlet communicates with the front cavity.

4. The speaker module according to claim 3, wherein: The resonance cavity channel is arranged on the side of the sealing ring close to the sound outlet.

5. The speaker module according to claim 2, wherein: The sealing ring includes a first end connected to the lower main magnetic steel and a second end connected to the lower housing. The resonance cavity channel is formed by a depression from the second end to the first end.

6. The loudspeaker module according to claim 3, wherein: The inner wall of the sound outlet is provided with a protruding part and a recessed part which are adjacently arranged. The protruding part is closer to the front cavity than the recessed part.

7. The loudspeaker module according to claim 1, wherein: The upper housing, the sounding element, and the lower housing enclose a rear cavity. The rear cavity communicates with the resonance cavity through the waterproof and breathable film.

8. The loudspeaker module according to claim 1, wherein: The yoke includes an upper surface close to the upper housing. The yoke is provided with a receiving groove recessed from the upper surface. The waterproof and breathable film is attached in the receiving groove and is flush with the upper surface.

9. The loudspeaker module according to claim 1, wherein: The auxiliary magnetic part includes an auxiliary magnetic steel and an auxiliary pole core attached to the auxiliary magnetic steel. The chassis is fixed to the auxiliary pole core.

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