SOUND DEVICE

A sound device include a frame, a first vibration system, and a magnetic circuit system. The first vibration system includes a first vibrating diaphragm and a first voice coil. The magnetic circuit system includes a magnetic yoke, a main magnetic steel set, and auxiliary magnetic steel sets. One side, away from the magnetic yoke body, of each of the magnetic yoke extending portions is recessed to form positioning holes. Positioning blocks protruded from the frame are one-to-one inserted into the positioning holes for positioning, and one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions at least partially abuts against the frame, so that the magnetic circuit system and the frame are assembled and positioned along a first direction and a second direction of the magnetic yoke. The sound device is easy to assemble and has excellent acoustic performance.

TECHNICAL FIELD

The present disclosure relates to a field of acoustic power, and in particular to a sound device applied to portable electronic products.

BACKGROUND

Along with arrival of mobile internet era, the number of smart mobile devices rises continuously. Among the smart mobile devices, mobile phones are undoubtedly most common and portable mobile terminal devices. Sound devices for playing sound are widely applied to conventional smart mobile devices such as the mobile phones. A vibration system and a magnetic circuit system applied to the sound devices directly affect sound quality of the sound devices.

The vibration system of the sound devices in the prior art includes a vibrating diaphragm, a voice coil, and a flexible conductive component. The vibrating diaphragm is fixed to a frame and is configured to vibrate and produce sound. The voice coil is attached to the vibrating diaphragm. The flexible conductive component is connected to the voice coil. The magnetic circuit system includes a magnetic yoke, a main magnetic steel, and two auxiliary magnetic steels. The magnetic yoke is fixed to the frame. The main magnetic steel is fixed to the magnetic yoke. The two auxiliary magnetic steels are respectively disposed on two opposite sides of the main magnetic steel. The two auxiliary magnetic steels are spaced apart from the main magnetic steel to form a magnetic gap.

However, when assembling the sound devices in the prior art, assembling the flexible conductive component, the voice coil, and the frame in a same tool, then assembling the main magnetic steel and the magnetic yoke in a same tool, and after turning over the frame, welding and fixing the magnetic yoke and the frame. The assembling sequence allows the voice coil and the frame to be assembled by using the same tool, which guarantees concentricity of the voice coil and the frame. However, subsequent welding and fixing of the magnetic yoke and the frame belong to another tool, which cannot guarantee the concentricity of the magnetic yoke and the voice coil of a previous tool, resulting in a decrease in accuracy of the concentricity of the main magnetic steel and the voice coil, affecting precision of the magnetic gaps, and resulting in low acoustic performance of the sound devices.

Therefore, it is necessary to provide a sound device to solve above technical problems.

SUMMARY

A purpose of the present disclosure is to provide a sound device that is easy to assemble and has excellent acoustic performance.

To achieve the above purpose, the present disclosure provides the sound device. The sound device include a frame, a first vibration system, and a magnetic circuit system. The first vibration system and the magnetic circuit system are fixed to the frame. The magnetic circuit system defines a first magnetic gap. The first vibration system includes a first vibrating diaphragm and a first voice coil. The first vibrating diaphragm is fixed to the frame. The first voice coil is inserted into the first magnetic gap to drive the first vibrating diaphragm to vibrate and produce sound. The magnetic circuit system includes a magnetic yoke, a main magnetic steel set, and two auxiliary magnetic steel sets, the magnetic yoke is fixed to the frame. The main magnetic steel set is fixed to the magnetic yoke. The two auxiliary magnetic steel sets are respectively disposed on a first side and a second side of the main magnetic steel set. The two auxiliary magnetic steel sets and the main magnetic steel set are spaced apart to form the first magnetic gap.

The magnetic yoke includes a magnetic yoke body and two magnetic yoke extending portions. The two magnetic yoke extending portions respectively extend from two opposite sides of the magnetic yoke body. The main magnetic steel set is fixed to one side, close to the first vibrating diaphragm, of the magnetic yoke body. The two magnetic yoke extending portions are respectively disposed on a third side and a fourth side of the main magnetic steel set.

One side, away from the magnetic yoke body, of each of the magnetic yoke extending portions is recessed towards a direction of the magnetic yoke body to form positioning holes. The frame is annular. Positioning blocks are disposed on the frame. The positioning blocks protrude from an inner side of the frame. The positioning blocks are one-to-one matched with the positioning holes.

The positioning blocks are one-to-one inserted into the positioning holes for positioning, so that the magnetic circuit system and the frame are assembled and positioned along a first direction of the magnetic yoke. The one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions at least partially abuts against the inner side of the frame, so that the magnetic circuit system and the frame are assembled and positioned along a second direction of the magnetic yoke. The first direction and the second direction are perpendicular to each other and are parallel to the magnetic yoke body.

Optionally, each of the magnetic yoke extending portions includes a first section and a second section. Each first section is bent and extends from the magnetic yoke body to a direction of the first vibrating diaphragm. Each second section is bent and extends from a corresponding first section to a direction of the frame. Each second section defines corresponding positioning holes. The main magnetic steel set is spaced apart from the two auxiliary magnetic steel sets and first sections. The main magnetic steel set, the two auxiliary magnetic steel sets, and first sections enclose to define the first magnetic gap.

Optionally, each of the magnetic yoke extending portions further includes a third section. Each third section is protruded from a corresponding second section to a direction away from the magnetic yoke body. The frame further includes accommodating grooves. The frame is recessed to form the accommodating grooves.

Each third section is accommodated in a corresponding accommodating groove. A side wall, close to a corresponding auxiliary magnetic steel set, of each third section abuts against a side wall of the corresponding accommodating groove, so that the magnetic circuit system and the frame are assembled and positioned along the first direction of the magnetic yoke.

Optionally, a side wall of each of the positioning holes connected to a corresponding third section and a side wall of the corresponding third section are flush and enclose to form a first connecting wall. A side wall of each of the accommodating grooves assembled with a corresponding positioning block and a side wall of the corresponding positioning block are flush and enclose to form a second connecting wall. Each first connecting wall abuts against a corresponding second connecting wall, so that the magnetic circuit system and the frame are assembled and positioned along the first direction of the magnetic yoke.

Optionally, there are four positioning holes. Every two positioning holes are formed in a same second section at intervals. Each third section is located between the two positioning holes in a same side of each second section. A portion, abutting against the inner side of the frame, of each second section is located between a corresponding positioning hole and a corner portion of one second section adjacent to the corresponding positioning hole.

Optionally, each of the magnetic yoke extending portions further includes a plurality of protruding blocks. The plurality of protruding blocks protrude from one side, away from the first vibrating diaphragm, of each of the magnetic yoke extending portions. The plurality of protruding blocks are respectively disposed on each second section and/or each third section. The plurality of protruding blocks are disposed in an array.

Optionally, the frame includes a first frame and a second frame; the first frame is stacked on the second frame. The first frame and the second frame form a fixing structure. The first vibrating diaphragm is fixed to the first frame. Each second section is fixed to the first frame. The positioning blocks are disposed on the first frame.

Optionally, the sound device includes a second vibration system. The second vibration system is fixed to the second frame. The first vibration system and the second vibration system are respectively disposed on two opposite sides of the magnetic circuit system along a vibration direction of the first vibrating diaphragm.

The second vibration system includes a second vibrating diaphragm and a second voice coil. The second vibrating diaphragm is fixed to the second frame. The second voice coil is configured to drive the second vibrating diaphragm to vibrate and produce sound. A second auxiliary pole core is disposed on one side, away from the first vibrating diaphragm, of each of the auxiliary magnetic steel sets. Each second auxiliary pole core is annular and is fixed to the second frame. Second auxiliary pole cores surround the magnetic yoke body at intervals. The second auxiliary pole cores and the magnetic yoke body enclose to form a second magnetic gap. The second magnetic gap is spaced apart from the first magnetic gap. The second magnetic gap surrounds the first magnetic gap. The second voice coil is inserted into the second magnetic gap.

Optionally, the main magnetic steel set includes a first main magnetic steel, a second main magnetic steel, and a main pole core. The first main magnetic steel is fixed to the one side, close to the first vibrating diaphragm, of the magnetic yoke body. The second main magnetic steel is stacked on and fixed to the first main magnetic steel. The main pole core is stacked on the second main magnetic steel. Each of the auxiliary magnetic steel sets includes an auxiliary magnetic steel, a first auxiliary pole core, and the second auxiliary pole core. Each first auxiliary pole core and each second auxiliary pole core are respectively stacked on two opposite sides of each auxiliary magnetic steel. Each first auxiliary pole core is located on one side, close to the first vibrating diaphragm, of each auxiliary magnetic steel. Each second auxiliary pole core is disposed on one side, close to the second vibrating diaphragm, of each auxiliary magnetic steel.

Compared with the prior art, in the present disclosure, the magnetic yoke includes the magnetic yoke body and two magnetic yoke extending portions. The two magnetic yoke extending portions respectively extend from two opposite sides of the magnetic yoke body. The one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions, is recessed towards a direction of the magnetic yoke body to form the positioning holes. The positioning blocks are disposed on the frame. The positioning blocks protrude from the inner side of the frame. The positioning blocks are one-to-one matched with the positioning holes. The positioning blocks are one-to-one inserted into the positioning holes for positioning, so that the magnetic circuit system and the frame are assembled and positioned along the first direction of the magnetic yoke. The one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions at least partially abuts against the inner side of the frame, so that the magnetic circuit system and the frame are assembled and positioned along the second direction of the magnetic yoke. On a basis that the main magnetic steel set is fixed on the magnetic yoke body, when the magnetic yoke is assembled with the frame, the positioning blocks are one-to-one connected with the positioning holes for stably fixing the magnetic yoke to the frame. The assembling method avoids a situation that when assembling a sound device in the prior art, the frame is turned over first and then the magnetic yoke and the frame is assembled. Compared with the sound device in the prior art, the sound device of the present disclosure is easier to assemble. Furthermore, structures of the magnetic yoke and the frame ensure concentricity between the magnetic yoke and the frame, making the concentricity between the first voice coil and the main magnetic steel set good, improving an accuracy of the first magnetic gap improves, and improving performance of a sound pressure level (SPL), so that the acoustic performance of the sound device is good.

DETAILED DESCRIPTION

As shown inFIGS.1-6, the present disclosure provides a sound device100.

Specifically, the sound device100include a frame1, a first vibration system2, a magnetic circuit system3, and a second vibration system4. The first vibration system2, the magnetic circuit system3, and the second vibration system4are fixed to the frame1.

The magnetic circuit system3defines a first magnetic gap301and a second magnetic gap302. The second magnetic gap302. is spaced apart from the first magnetic gap301, and the second magnetic gap302surrounds the first magnetic gap301.

The frame1is annular. Positioning blocks111are disposed on the frame1.

The positioning blocks111protrude from an inner side of the frame1. The positioning blocks111are configured to position with the magnetic circuit system3, during assembly.

In the embodiment, the frame1includes a first frame11and a second frame12. The first frame11is stacked on the second frame12. The first frame and the second frame form a fixing structure. The positioning blocks111are disposed on the first frame11. The frame1is divided into separate structures of the first frame11and the second frame12, which facilitates assembly of the sound device100. Of course, it is also possible to set the frame1as an integral structure.

The first vibration system2includes a first vibrating diaphragm21, a first voice coil22, and a first flexible conductive piece23. The first vibrating diaphragm21is fixed to the frame1. The first voice coil22is inserted into the first magnetic gap301to drive the first vibrating diaphragm21to vibrate and produce sound. The first flexible conductive piece23. is connected to the first voice coil22. Two ends of the first flexible conductive piece23are respectively fixed to the first voice coil22and the first frame11. The first flexible conductive piece23is electrically connected to the first voice coil22. Specifically, the first flexible conductive piece23is electrically connected to a first lead wire of the first voice coil22.

In the embodiment, the first diaphragm21is fixed to the first frame11. When assembling, the first vibration system2and the first frame1are firstly fixed, so that concentricity between the first voice coil22and the first frame11is good.

The first vibration system2and the second vibration system4are respectively disposed on two opposite sides of the magnetic circuit system3along a vibration direction of the first vibrating diaphragm21. The second vibration system4is fixed to the second frame12.

The second vibration system4includes a second vibrating diaphragm41, a second voice coil42, and a second conductive piece43. The second vibrating diaphragm41is fixed to the second frame12. The second voice coil42is configured to drive the second vibrating diaphragm41to vibrate and produce sound. The second flexible conductive piece43. is connected to the second voice coil42. The second voice coil42is inserted into the second magnetic gap302to drive the second vibrating diaphragm to vibrate and produce sound. Two ends of the second flexible conductive piece43are respectively fixed to the second voice coil42and the second frame12. The second flexible conductive piece43is electrically connected to the second voice coil42. Specifically, the second flexible conductive piece43is electrically connected to a second lead wire of the second voice coil42.

The magnetic circuit system3includes a magnetic yoke31, a main magnetic steel set32, and two auxiliary magnetic steel sets33. The magnetic yoke31is fixed to the frame1. The main magnetic steel set32is fixed to the magnetic yoke31. The two auxiliary magnetic steel sets33are respectively disposed on a first side and a second side of the main magnetic steel set32. The two auxiliary magnetic steel sets33and the main magnetic steel set32are spaced apart to form the first magnetic gap301.

The magnetic yoke31includes a magnetic yoke body311and two magnetic yoke extending portions312. The two magnetic yoke extending portions312respectively extend from two opposite sides of the magnetic yoke body311. The main magnetic steel set32is fixed to one side, close to the first vibrating diaphragm21, of the magnetic yoke body311.

The two magnetic yoke extending portions312are respectively disposed on a third side and a fourth side of the main magnetic steel set32.

One side, away from the magnetic yoke body, of each of the magnetic yoke extending portions312is recessed towards a direction of the magnetic yoke body311to form positioning holes3120. The positioning blocks111are one-to-one matched with the positioning holes3120.

The positioning blocks111are one-to-one inserted into the positioning holes3120for positioning, so that the magnetic circuit system3and the frame1are assembled and positioned along a first direction of the magnetic yoke31. The one side, away from the magnetic yoke body311, of each of the magnetic yoke extending portions312at least partially abuts against the inner side of the frame1, so that the magnetic circuit system3and the frame1are assembled and positioned along a second direction of the magnetic yoke31. The first direction and the second direction are perpendicular to each other and are parallel to the magnetic yoke body311.

The magnetic yoke31and the frame1are respectively positioned in the first direction and the second direction of the magnetic yoke31, so that after the assembly is completed, a relative position between the magnetic yoke31and the frame1is accurately fixed. Since the main magnetic steel set32is fixed on the magnetic yoke body311, a relative positions between the main magnetic steel set32and the frame1is accurately fixed. Since the first voice coil22and the frame1are assembled and fixed, the main magnetic steel set32and the first voice coil22are accurately assembled. That is, the concentricity of the main magnetic steel set32and the first voice coil22is good, so that a size of the first magnetic gap301is reduced, thereby improving performance of a sound pressure level (SPL) and making acoustic performance of the sound device100good.

Specifically, each of the magnetic yoke extending portions312includes a first section3121, a second section3122, and a section3123. Each first section is bent and extends from the magnetic yoke body311to a direction of the first vibrating diaphragm21. Each second section3122is bent and extends from a corresponding first section3121to a direction of the frame1. Each third section is protruded from a corresponding second section to a direction away from the magnetic yoke body311. The second voice coil42is spaced apart from and surrounds each first section3121. Each second section3122is fixed to the first frame11.

Each second section3122defines corresponding positioning holes3120. In the embodiment, there are four positioning holes3120. Every two positioning holes3120are formed in a same second section3122at intervals. Each third section3123is located between the two positioning holes3120in a same side of each second section3122.

A portion, abutting against the inner side of the frame, of each second section3122is located between a corresponding positioning hole3120and a corner portion of one second section3122adjacent to the corresponding positioning hole3120.

The frame1further includes accommodating grooves10. The frame1is recessed to form the accommodating grooves10. Each third section3123is accommodated in a corresponding accommodating groove10. A side wall, close to a corresponding auxiliary magnetic steel set33, of each third section3123abuts against a side wall of the corresponding accommodating groove10, so that the magnetic circuit system3and the frame1are assembled and positioned along the first direction of the magnetic yoke31.

A side wall of each third section3123close to a corresponding auxiliary magnetic steel set33abuts against a side wall of a corresponding accommodating groove10, so that the magnetic circuit system3and the frame1are assembled and positioned in the first direction of the magnetic yoke31. Each third section3123is positioned by the side wall of the corresponding accommodating groove10. Each third section3123, the corresponding accommodating groove10are positioned with corresponding positioning blocks111and corresponding positioning holes3120during assembly, so that the frame and the magnetic circuit system3are easy to assemble, the assembly accuracy is improved, and the acoustic performance of the sound device100is good.

In the embodiment, the side wall of each of the positioning holes3120connected to a corresponding third section3123and a side wall of the corresponding third section3123are flush and enclose to form a first connecting wall. A side wall of each of the accommodating grooves10assembled with a corresponding positioning block and a side wall of the corresponding positioning block are flush and enclose to form a second connecting wall. Each first connecting wall abuts against a corresponding second connecting wall, so that the magnetic circuit system3and the frame1are assembled and positioned along the first direction of the magnetic yoke31. Therefore, the frame and the magnetic circuit system3are easy to assemble, the assembly accuracy is improved, and the acoustic performance of the sound device100is good.

In the embodiment, each of the magnetic yoke extending portions312further includes a plurality of protruding blocks3124. The plurality of protruding blocks3124protrude from one side, away from the first vibrating diaphragm21, of each of the magnetic yoke extending portions312. The plurality of protruding blocks3124are respectively disposed on each second section3122and/or each third section3123. The plurality of protruding blocks3124are disposed in an array. The plurality of protruding blocks33124facilitate the assembly of the magnetic yoke31and the frame1, and prevent the magnetic yoke31from slipping during assembly, so that the magnetic yoke31is not damaged during assembly.

The main magnetic steel set32is spaced apart from the two auxiliary magnetic steel sets33and first sections3121. The main magnetic steel set32, the two auxiliary magnetic steel sets33, and first sections3121enclose to define the first magnetic gap301.

The main magnetic steel set32includes a first main magnetic steel321, a second main magnetic steel322, and a main pole core323. The first main magnetic steel321is fixed to the one side, close to the first vibrating diaphragm21, of the magnetic yoke body. The second main magnetic steel322is stacked on and fixed to the first main magnetic steel321. The main pole core323is stacked on the second main magnetic steel322.

Each of the auxiliary magnetic steel sets33includes an auxiliary magnetic steel331, a first auxiliary pole core332, and the second auxiliary pole core333. Each first auxiliary pole core332and each second auxiliary pole core333are respectively stacked on two opposite sides of each auxiliary magnetic steel331. Each first auxiliary pole core332is located on one side, close to the first vibrating diaphragm21, of each auxiliary magnetic steel331. Each second auxiliary pole core333is disposed on one side, close to the second vibrating diaphragm41, of each auxiliary magnetic steel331. Each second auxiliary pole core333is fixed to the second frame12.

The second main magnetic steel322and the main pole core323are spaced apart from and enclosed with auxiliary magnetic steels331and first auxiliary pole cores332to form the first magnetic gap301.

The main magnetic steel set32is spaced apart from the auxiliary magnetic steel sets33to form the second magnetic gap302. Specifically, second auxiliary pole cores333surround the magnetic yoke body311at intervals. The second auxiliary pole cores333and the magnetic yoke body31enclose to form the second magnetic gap302.

Compared with the prior art, in the present disclosure, the magnetic yoke includes the magnetic yoke body and two magnetic yoke extending portions. The two magnetic yoke extending portions respectively extend from two opposite sides of the magnetic yoke body. The one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions, is recessed towards a direction of the magnetic yoke body to form the positioning holes. The positioning blocks are disposed on the frame. The positioning blocks protrude from the inner side of the frame. The positioning blocks are one-to-one matched with the positioning holes. The positioning blocks are one-to-one inserted into the positioning holes for positioning, so that the magnetic circuit system and the frame are assembled and positioned along the first direction of the magnetic yoke. The one side, away from the magnetic yoke body, of each of the magnetic yoke extending portions at least partially abuts against the inner side of the frame, so that the magnetic circuit system and the frame are assembled and positioned along the second direction of the magnetic yoke. On a basis that the main magnetic steel set is fixed on the magnetic yoke body, when the magnetic yoke is assembled with the frame, the positioning blocks are one-to-one connected with the positioning holes for stably fixing the magnetic yoke to the frame. The assembling method avoids a situation that when assembling a sound device in the prior art, the frame is turned over first and then the magnetic yoke and the frame is assembled. Compared with the sound device in the prior art, the sound device of the present disclosure is easier to assemble. Furthermore, structures of the magnetic yoke and the frame ensure the concentricity between the magnetic yoke and the frame, making the the concentricity between the first voice coil and the main magnetic steel set good, improving an accuracy of the first magnetic gap improves, and improving the performance of the SPL, so that the acoustic performance of the sound device is good.

The above are only the embodiments of the present disclosure. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present disclosure, and these improvements fall within the protection scope of the present disclosure.