Sound production device

Abstract

Provided in the present invention is a sound production device, comprising a first basket, a first vibration system fixed to the first basket, a second basket, a second vibration system fixed to the second basket, and a magnetic circuit system for driving the first vibration system and the second vibration system to vibrate and produce sound respectively, wherein the magnetic circuit system comprises a lower clamping plate fixed on the first basket, main magnetic steel stacked and fixed on the lower clamping plate, secondary magnetic steel stacked and fixed on the lower clamping plate, an upper clamping plate stacked and fixed on the secondary magnetic steel, a main pole core stacked and fixed on the main magnetic steel, and central secondary magnetic steel stacked and fixed on the main pole core; and the magnetic circuit system further comprises central magnetic steel stacked and fixed on the central secondary magnetic steel and a secondary pole core stacked and fixed on the central magnetic steel. The sound production device in the embodiments of the present invention can increase the thickness of the central magnetic steel, that is, improves the magnetic flux of the magnetic circuit system, enabling the magnetic flux thereof to be maximized.

Description

Sound-generating device Technical Field

[0001] The present invention relates to the field of acoustic technology, and in particular to a sound-generating device. Background Art

[0002] A sound-generating device is a device that converts electrical signal energy into sound energy. Based on its structure, it includes single-vibration system sound-generating devices and dual-vibration system sound-generating devices.

[0003] In the related art, the sound-producing device of the dual vibration system includes a first basin frame, a first vibration system fixed to the first basin frame, a second basin frame, a second vibration system fixed to the second basin frame, and a magnetic circuit system that drives the first vibration system and the second vibration system to vibrate and produce sound respectively.

[0004] Among them, the magnetic circuit system includes a lower clamping plate fixed to the first basin frame, a main magnetic steel stacked and fixed on the lower clamping plate, a first secondary magnetic steel arranged around the main magnetic steel, a main pole core in a flat plate shape and stacked and fixed on the main magnetic steel, a main pole core stacked and fixed on the main magnetic steel, a central secondary magnetic steel stacked and fixed on the main pole core, and a central magnetic steel stacked and fixed on the side of the central secondary magnetic steel close to the main pole core.

[0005] In the above magnetic circuit system, since the central magnetic steel needs to be stacked on the flat main pole core, the thickness of the central magnetic steel is limited, that is, the magnetic flux of the magnetic circuit system is limited, and the magnetic flux cannot be maximized. Technical issues

[0006] The object of the present invention is to provide a new sound-generating device to solve the problem in the related art that the magnetic flux of the magnetic circuit system of the sound-generating device is limited and its magnetic flux cannot be maximized. Technical Solutions

[0007] The present invention provides a sound-producing device, comprising a first frame, a first vibration system fixed to the first frame, a second frame, a second vibration system fixed to the second frame, and a magnetic circuit system for respectively driving the first vibration system and the second vibration system to vibrate and produce sound. The first vibration system and the second vibration system are coaxially arranged and supported on opposite sides of the magnetic circuit system by the first frame and the second frame, respectively. The first vibration system comprises a first diaphragm fixed to the first frame and a first voice coil driving the first diaphragm to vibrate. The second vibration system comprises a second diaphragm fixed to the second frame and a second voice coil driving the second diaphragm to vibrate. A first magnetic gap and a second magnetic gap are respectively provided on opposite sides of the magnetic circuit system. The first voice coil and the second voice coil are respectively inserted into the first magnetic gap and the second magnetic gap.

[0008] The magnetic circuit system includes a lower clamping plate fixed to the first basin, a main magnetic steel stacked and fixed on the side of the lower clamping plate away from the first vibration system, a secondary magnetic steel stacked and fixed on the lower clamping plate and surrounding the main magnetic steel and spaced apart from the main magnetic steel, an annular upper clamping plate stacked and fixed on the side of the secondary magnetic steel away from the lower clamping plate and fixed to the second basin, a main pole core stacked and fixed on the side of the main magnetic steel away from the lower clamping plate, and a central secondary magnetic steel stacked and fixed on the side of the main pole core away from the main magnetic steel; the upper clamping plate and the main pole core are spaced apart to form a second magnetic gap; the main pole core is provided with a first through hole passing through it along the vibration direction of the first diaphragm, the main magnetic steel is provided with a second through hole passing through it along the vibration direction, and the lower clamping plate is provided with a third through hole passing through it along the vibration direction, and the first through hole, the second through hole and the third through hole are coaxially arranged opposite to each other;

[0009] The magnetic circuit system also includes a central magnetic steel stacked and fixed on the side of the central secondary magnetic steel close to the main pole core, and a secondary pole core stacked and fixed on the side of the central magnetic steel away from the central secondary magnetic steel and located in the third through hole. The central magnetic steel passes through the first through hole and the second through hole in sequence and is spaced apart from the main pole core and the main magnetic steel respectively. The secondary pole core and the lower clamping plate are spaced apart to form the first magnetic gap.

[0010] Preferably, the side of the upper clamping plate away from the secondary magnetic steel is fixed to the second basin frame.

[0011] Preferably, the first vibration system further includes a first elastic member respectively fixed to the first basket and the first voice coil on a side close to the first diaphragm; the first diaphragm is fixed to a side of the first elastic member away from the second voice coil.

[0012] Preferably, the second vibration system also includes an elastic support component and a ring-shaped skeleton; one end of the elastic support component is fixed to the second basin frame, and the other end is fixed to the outer periphery of the skeleton, and the inner periphery of the skeleton is fixed to the side of the second voice coil close to the second diaphragm.

[0013] Preferably, the elastic support assembly includes a second elastic member and an auxiliary diaphragm; one end of the second elastic member is fixed to the second basin frame, and the other end is fixed to the outer periphery of the skeleton, and the auxiliary diaphragm is fixed to the side of the second elastic member away from the second basin frame.

[0014] Preferably, the second diaphragm includes an outer fold ring and an inner fold ring that are spaced apart and are respectively annular, and a fixing portion formed by extending from the inner circumference of the inner fold ring; the outer circumference of the outer fold ring is fixed to the second basin frame, the inner circumference of the outer fold ring and the outer circumference of the inner fold ring are respectively fixed to the skeleton, and the side of the fixing portion close to the magnetic circuit system is fixed to the side of the central auxiliary magnet away from the main pole core.

[0015] Preferably, the magnetizing direction of the main magnetic steel is parallel to the vibration direction of the first diaphragm; the magnetizing directions of the auxiliary magnetic steel, the central auxiliary magnetic steel and the central magnetic steel are respectively parallel to and opposite to the magnetizing direction of the main magnetic steel. Beneficial effects

[0016] Compared with the prior art, the sound-generating device of the present invention provides a first through-hole on the main pole core, so that the central magnetic steel stack can be fixed to the central secondary magnetic steel through the first through-hole, thereby increasing the thickness of the central magnetic steel, that is, improving the magnetic flux of the magnetic circuit system and maximizing its magnetic flux. In addition, the central secondary magnetic steel is designed to be flat and can be used to seal the rear cavity; the gap between the central magnetic steel and the main pole core can be used to deal with glue overflow during the gluing of the magnetic steels, thereby increasing the reliability margin; the first through-hole provided on the main pole core can also improve the bass sound effect of the sound-generating device; the receiver function part is provided on the side of the magnetic circuit system away from the speaker part, that is, the sound is emitted from the back side, which can improve the treble sound effect or realize the receiver function; the treble part and the bass part form a coaxial full-band speaker, which can improve the quality of the sound effect; during a voice call, the receiver function part faces the earpiece, and the speaker part can be used as a device for anti-phase noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 can also derive other drawings based on these drawings without inventive work, among which:

[0018] FIG1 is a schematic diagram of the three-dimensional structure of a sound-generating device provided by an embodiment of the present invention;

[0019] FIG2 is a schematic diagram of the structural hierarchy of a sound-generating device provided by an embodiment of the present invention;

[0020] FIG3 is a cross-sectional view along line AA of FIG1 ;

[0021] FIG4 is a schematic diagram of the magnetization direction of a magnetic circuit system in a sound-generating device provided by an embodiment of the present invention.

[0022] Among them, 100, sound-emitting device; 1, first basin frame; 2, first vibration system; 21, first diaphragm; 22, first voice coil; 23, first elastic member; 24, front cover; 241, sound outlet; 3, second basin frame; 4, second vibration system; 41, second diaphragm; 411, outer folding ring; 412, inner folding ring; 413, fixing part; 42, second voice coil; 43, elastic support assembly; 431, second elastic member; 432, auxiliary diaphragm; 44, skeleton; 5, magnetic circuit system; 51, lower splint; 511, third through hole; 52, main magnet; 521, second through hole; 53, auxiliary magnet; 54, main pole core; 541, first through hole; 55, central auxiliary magnet; 56, central magnet; 57, auxiliary pole core; 58, upper splint; 10, first magnetic gap; 20, second magnetic gap; 30, front cavity. Modes for Carrying Out the Invention

[0023] 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 this field without making creative efforts are within the scope of protection of the present invention.

[0024] An embodiment of the present invention provides a sound-producing device 100, which, as shown in Figures 1 to 3, includes a first basin frame 1, a first vibration system 2 fixed to the first basin frame 1, a second basin frame 3, a second vibration system 4 fixed to the second basin frame 3, and a magnetic circuit system 5 that respectively drives the first vibration system 2 and the second vibration system 4 to vibrate and produce sound. The first vibration system 2 and the second vibration system 4 are coaxially arranged and supported on opposite sides of the magnetic circuit system 5 by the first basin frame 1 and the second basin frame 3, respectively.

[0025] Among them, the first basin frame 1, the first vibration system 2 and the magnetic circuit system 5 together form the receiver function part or the tweeter part of the sound-producing device 100; the second basin frame 3, the second vibration system 4 and the magnetic circuit system 5 together form the speaker part or the bass part of the sound-producing device 100.

[0026] The first vibration system 2 includes a first diaphragm 21 fixed to the first frame 1 and a first voice coil 22 that drives the vibration of the first diaphragm 21. The sound-generating device 100 also includes a front cover 24 that covers the frame and is spaced apart from the first diaphragm 21 to form a front cavity 30. The front cover 24 has a sound outlet 241 extending therethrough along the vibration direction of the first diaphragm 21.

[0027] The first vibration system 2 further includes a first elastic member 23 fixed to the first frame 1 and the first voice coil 22 on a side close to the first diaphragm 21 . The first diaphragm 21 is fixed to a side of the first elastic member 23 away from the second voice coil 42 .

[0028] The second basin frame 3, the second vibration system 4 and the magnetic circuit system 5 are jointly arranged to form a sound-generating inner cavity.

[0029] The second vibration system 4 includes a second diaphragm 41 fixed to the second frame 3 and a second voice coil 42 driving the second diaphragm 41 to vibrate.

[0030] The second vibration system 4 also includes an elastic support component 43 and a ring-shaped skeleton 44; one end of the elastic support component 43 is fixed to the second basin frame 3, and the other end is fixed to the outer periphery of the skeleton 44, and the inner periphery of the skeleton 44 is fixed to the side of the second voice coil 42 close to the second diaphragm 41.

[0031] The elastic support assembly 43 includes a second elastic member 431 and an auxiliary diaphragm 432. One end of the second elastic member 431 is fixed to the second frame 3, and the other end is fixed to the outer periphery of the frame 44. The auxiliary diaphragm 432 is fixed to the side of the second elastic member 431 away from the second frame 3. The second elastic member 431 and the auxiliary diaphragm 432 each include two, one auxiliary diaphragm 432 fixed to each second elastic member 431, and the two second elastic members 431 are fixed to opposite sides of the second frame 3.

[0032] The second diaphragm 41 includes an outer fold ring 411 and an inner fold ring 412 that are spaced apart and are respectively annular, and a fixing portion 413 formed by extending from the inner periphery of the inner fold ring 412; the outer periphery of the outer fold ring 411 is fixed to the second basin frame 3, and the inner periphery of the outer fold ring 411 and the outer periphery of the inner fold ring 412 are respectively fixed to the frame 44.

[0033] The magnetic circuit system 5 includes a lower clamping plate 51 fixed to the first basin frame 1, a main magnet 52 stacked and fixed on the side of the lower clamping plate 51 away from the first vibration system 2, an auxiliary magnet 53 stacked and fixed on the lower clamping plate 51 and surrounding the main magnet 52 and spaced apart from the main magnet 52, a main pole core 54 stacked and fixed on the side of the main magnet 52 away from the lower clamping plate 51, and a central auxiliary magnet 55 stacked and fixed on the side of the main pole core 54 away from the main magnet 52; the main pole core 54 is provided with a first through hole 541 passing through it along the vibration direction of the first vibration system 2, the main magnet 52 is provided with a second through hole 521 passing through it along the vibration direction, and the lower clamping plate 51 is provided with a third through hole 511 passing through it along the vibration direction, and the first through hole 541, the second through hole 521 and the third through hole 511 are coaxially arranged opposite each other.

[0034] The magnetic circuit system 5 also includes a central magnet 56 stacked and fixed on the side of the central auxiliary magnet 55 close to the main pole core 54. The central magnet 56 passes through the first through hole 541 and the second through hole 521 in sequence and is spaced apart from the main pole core 54 and the main magnet 52 respectively.

[0035] The magnetization direction of the main magnet 52 is parallel to the vibration direction of the first diaphragm 21. The magnetization directions of the auxiliary magnets 53, the central auxiliary magnet 55, and the central magnet 56 are respectively parallel to and opposite to the magnetization direction of the main magnet 52. As shown in FIG4 , in this embodiment, the magnetization direction of the main magnet 52 is from the side of the main magnet 52 away from the lower clamping plate 51 toward the side of the main magnet 52 closer to the lower clamping plate 51.

[0036] There are four auxiliary magnetic steels 53 . The four first auxiliary magnetic steels 53 are respectively disposed on four circumferential sides of the main magnetic steel 52 and are spaced apart from the main magnetic steel 52 .

[0037] The magnetic circuit system 5 also includes a secondary pole core 57 stacked and fixed on the side of the central magnet 56 away from the central secondary magnet 55 and located in the third through hole 511. The secondary pole core 57 and the lower clamping plate 51 are spaced apart to form a first magnetic gap 10; the first voice coil 22 is inserted through the third through hole 511 and suspended in the first magnetic gap 10.

[0038] The magnetic circuit system 5 further includes an annular upper clamping plate 58 which is stacked and fixed to the side of the secondary magnet 53 away from the lower clamping plate 51 and fixed to the second basin frame 3 ; the side of the upper clamping plate 58 away from the secondary magnet 53 is partially fixed to the second basin frame 3 .

[0039] The upper clamping plate 58 and the main pole core 54 are spaced apart to form a second magnetic gap 20 , and the second voice coil 42 is inserted and suspended in the second magnetic gap 20 .

[0040] The side of the fixing portion 413 close to the magnetic circuit system 5 is fixed to the side of the auxiliary magnetic steel 53 away from the main pole core 54 .

[0041] The sound-generating device 100 of this embodiment is provided with a first through hole 541 on the main pole core 54, so that the central magnet 56 can be stacked and fixed on the central auxiliary magnet 55 through the first through hole 541, thereby increasing the thickness of the central magnet 56, that is, improving the magnetic flux of the magnetic circuit system 5 and maximizing its magnetic flux. In addition, the space of the first through hole 541 can be increased to increase the strength of the magnetic circuit system 5 and make the depth of the first magnetic gap 10 deeper, that is, making the vibration space of the first voice coil 22 larger and better designability. In addition, the central auxiliary magnet 55 is designed to be flat and can be used to seal the rear cavity; the gap between the central magnet 56 and the main pole core 54 can be used to deal with glue overflow when the magnets are glued to increase the reliability margin; by providing a first through hole 541 on the main pole core 54, the bass sound effect of the sound-emitting device 100 can also be improved; the receiver function part is provided on the side of the magnetic circuit system 5 away from the speaker part, that is, the sound is emitted from the back side, which can improve the treble sound effect or realize the receiver function; the treble part and the bass part form a coaxial full-band speaker, which can improve the quality of the sound effect; during a voice call, the receiver function part faces the earpiece, and the speaker part can be used as an anti-phase noise reduction device.

[0042] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A sound-generating device, comprising a first basin, a first vibration system fixed to the first basin, a second basin, a second vibration system fixed to the second basin, and a magnetic circuit system for respectively driving the first vibration system and the second vibration system to vibrate and produce sound, wherein the first vibration system and the second vibration system are coaxially arranged and supported on opposite sides of the magnetic circuit system by the first basin and the second basin, respectively; the first vibration system comprises a first diaphragm fixed to the first basin and a first voice coil driving the first diaphragm to vibrate, and the second vibration system comprises a second diaphragm fixed to the second basin and a second voice coil driving the second diaphragm to vibrate; a first magnetic gap and a second magnetic gap are respectively provided on opposite sides of the magnetic circuit system, and the first voice coil and the second voice coil are respectively inserted into the first magnetic gap and the second magnetic gap; and the device is characterized in that: The magnetic circuit system includes a lower clamping plate fixed to the first basin, a main magnetic steel stacked and fixed on the side of the lower clamping plate away from the first vibration system, a secondary magnetic steel stacked and fixed on the lower clamping plate and surrounding the main magnetic steel and spaced apart from the main magnetic steel, an annular upper clamping plate stacked and fixed on the side of the secondary magnetic steel away from the lower clamping plate and fixed to the second basin, a main pole core stacked and fixed on the side of the main magnetic steel away from the lower clamping plate, and a central secondary magnetic steel stacked and fixed on the side of the main pole core away from the main magnetic steel; the upper clamping plate and the main pole core are spaced apart to form a second magnetic gap; the main pole core is provided with a first through hole passing through it along the vibration direction of the first diaphragm, the main magnetic steel is provided with a second through hole passing through it along the vibration direction, and the lower clamping plate is provided with a third through hole passing through it along the vibration direction, and the first through hole, the second through hole and the third through hole are coaxially arranged opposite to each other; The magnetic circuit system also includes a central magnetic steel stacked and fixed on the side of the central secondary magnetic steel close to the main pole core, and a secondary pole core stacked and fixed on the side of the central magnetic steel away from the central secondary magnetic steel and located in the third through hole. The central magnetic steel passes through the first through hole and the second through hole in sequence and is spaced apart from the main pole core and the main magnetic steel respectively. The secondary pole core and the lower clamping plate are spaced apart to form the first magnetic gap.

2. The sound-generating device according to claim 1, wherein The side of the upper clamping plate away from the secondary magnetic steel is fixed to the second basin frame.

3. The sound-generating device according to claim 1, wherein: The first vibration system further includes a first elastic member fixed to the first basket and the first voice coil on a side close to the first diaphragm; the first diaphragm is fixed to a side of the first elastic member away from the second voice coil.

4. The sound-generating device according to claim 1, wherein: The second vibration system also includes an elastic support component and a ring-shaped skeleton; one end of the elastic support component is fixed to the second basin frame, and the other end is fixed to the outer periphery of the skeleton, and the inner periphery of the skeleton is fixed to the side of the second voice coil close to the second diaphragm.

5. The sound-generating device according to claim 4, wherein: The elastic support assembly includes a second elastic member and an auxiliary diaphragm; one end of the second elastic member is fixed to the second basin frame, and the other end is fixed to the outer periphery of the skeleton, and the auxiliary diaphragm is fixed to the side of the second elastic member away from the second basin frame.

6. The sound-generating device according to claim 5, wherein: The second diaphragm includes an outer fold ring and an inner fold ring that are spaced apart and are respectively annular, and a fixing portion formed by extending from the inner circumference of the inner fold ring; the outer circumference of the outer fold ring is fixed to the second basin frame, the inner circumference of the outer fold ring and the outer circumference of the inner fold ring are respectively fixed to the frame, and the side of the fixing portion close to the magnetic circuit system is fixed to the side of the central auxiliary magnet away from the main pole core.

7. The sound-generating device according to claim 1, wherein: The magnetizing direction of the main magnetic steel is parallel to the vibration direction of the first diaphragm; the magnetizing directions of the auxiliary magnetic steel, the central auxiliary magnetic steel and the central magnetic steel are respectively parallel to and opposite to the magnetizing direction of the main magnetic steel.

Images