A multifunctional sound-generating device

Abstract

The present invention provides a multifunctional sound-generating device, comprising a shell having a receiving cavity and a sound-generating unit suspended in the receiving cavity, the sound-generating unit comprising a basin frame, a vibration system fixed in the basin frame, and a magnetic circuit system driving the vibration system to vibrate and generate sound in a first direction and having a magnetic gap, characterized in that the multifunctional sound-generating device also comprises a vibrator suspended in the receiving cavity and located on a side of the magnetic circuit system away from the vibration system, and a coil mounted on the vibrator, the magnetic circuit system interacts with the coil to drive the vibrator to reciprocate in a second direction, and at the same time, the magnetic circuit system drives the sound-generating unit to reciprocate in the second direction, and the second direction is perpendicular to the first direction. Since the vibration system and the vibrator share a magnetic circuit system, and the sound-generating unit and the vibrator are assembled in a shell, the space occupied is greatly reduced; the sound-generating unit and the vibrator form a double vibration system, which not only improves the vibration effect, but also avoids adding additional components, further saving space.

Description

[Technical field]

[0001] The invention belongs to the technical field of electroacoustic conversion, and in particular relates to a multifunctional sound-generating device. [Background technology]

[0002] With the rapid development of the consumer electronics industry, especially smartphones, end consumers have higher and higher demands for device usage experience. In addition to visual, the demand for auditory and tactile experience is gradually increasing.

[0003] In the prior art, the performance improvement of speaker modules and motors is generally achieved by increasing the size of the product. However, as the internal space of electronic devices becomes more and more compact, the space occupied by batteries, motherboards, and cameras is increasing, which in turn requires that the size of speaker modules and vibration motors cannot be increased or even reduced, thus creating a conflict with the demand for performance improvement. Therefore, mobile phone manufacturers continue to put forward smaller requirements for the space of speaker and motor products, and also put forward higher requirements for the vibration function of the motor.

[0004] Therefore, it is necessary to provide a technical solution in which the speaker and the motor occupy less space and have stronger vibration function. [Summary of the invention]

[0005] The purpose of the present invention is to provide a multifunctional sound-generating device that can solve the technical problem of smaller occupied space for speakers and motors and stronger vibration function.

[0006] The technical solution of the present invention is as follows: A multifunctional sound-emitting device comprises a shell having a receiving cavity and a sound-emitting unit suspended in the receiving cavity, the sound-emitting unit comprises a basin, a vibration system fixed in the basin, and a magnetic circuit system driving the vibration system to vibrate and generate sound along a first direction and having a magnetic gap, the multifunctional sound-emitting device also comprises a vibrator suspended in the receiving cavity and located on a side of the magnetic circuit system away from the vibration system, and a coil assembled on the vibrator, the magnetic circuit system interacts with the coil to drive the vibrator to vibrate back and forth in a second direction, and at the same time enables the magnetic circuit system to drive the sound-emitting unit to vibrate back and forth in the second direction, and the second direction is perpendicular to the first direction.

[0007] Preferably, the multifunctional sound-emitting device further comprises a first elastic member respectively connected to the shell and the sound-emitting unit, and a second elastic member respectively connected to the shell and the vibrator.

[0008] Preferably, the first elastic member is disposed on two opposite sides of the sound-emitting unit along the second direction, and along the first direction, the first elastic member is spaced apart from the second elastic member.

[0009] Preferably, the sound-emitting unit further comprises an upper cover arranged on a side of the basin frame away from the magnetic circuit system, and the first elastic member connects the shell and the upper cover respectively.

[0010] Preferably, the vibrator includes a main body portion suspended and assembled in the shell, two side wall portions bent and extended from opposite ends of the main body portion toward the direction of the sound-emitting unit, and two mass blocks respectively fixedly connected to the main body portion, and the two mass blocks are arranged at intervals and located between the two side wall portions.

[0011] Preferably, the second elastic member includes a bearing portion assembled on the main body, and two elastic structures whose two ends are respectively fixedly connected to the bearing portion and the shell and are spaced apart on opposite sides of the bearing portion along the second direction, and the two elastic structures are at least partially fixed to the side wall portion.

[0012] Preferably, the elastic structure includes a first connecting portion fixedly connected to one end of the bearing portion and located between the side wall portion and the shell, an elastic portion bent from one end of the first connecting portion toward the vibrator, and a second connecting portion bent from one end of the elastic portion away from the first connecting portion and fixedly connected to the shell, the first connecting portion and the second connecting portion are arranged opposite to each other, and the first connecting portion is at least partially attached to the side wall portion.

[0013] Preferably, the main body is provided with a mounting through slot adapted to the coil, the coil is assembled in the mounting through slot, and along the first direction, the coil is arranged opposite to the magnetic gap.

[0014] Preferably, the magnetic circuit system includes a main magnet and a secondary magnet arranged around the main magnet to form the magnetic gap, and the vibration system includes a diaphragm connected to the basin frame, a spherical top frame connected to the diaphragm, and a voice coil inserted in the magnetic gap and connected to the spherical top frame.

[0015] Preferably, the main magnetic steel includes an upper magnetic steel and a lower magnetic steel with the same magnetic poles facing each other, and the magnetic circuit system also includes a main pole core respectively abutting against the upper magnetic steel and the lower magnetic steel on both sides, and a secondary pole core attached to the secondary magnetic steel; the magnetic pole directions of the secondary magnetic steel and the lower magnetic steel are opposite; the magnetic pole directions of the secondary magnetic steel and the upper magnetic steel are the same.

[0016] The beneficial effects of the present invention are as follows: since the vibration system of the speaker vibrates and produces sound along the first direction under the drive of the magnetic circuit system, the vibrator of the motor vibrates back and forth along the second direction under the interaction between the magnetic circuit system and the coil, and the sound-emitting unit vibrates back and forth along the second direction driven by the magnetic circuit system, the speaker and the motor share a magnetic circuit system, and the sound-emitting unit and the vibrator are assembled in a shell, which greatly reduces the space occupied; the sound-emitting unit and the vibrator form a dual vibration system, and the sound-emitting unit can not only produce sound but also vibrate in coordination with the vibrator, which not only improves the vibration effect but also avoids adding additional components, further saving space.

Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the multifunctional sound-generating device according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Sectional view in the AA direction;

[0019] Figure 3 It is a schematic diagram of the three-dimensional decomposition structure of the multifunctional sound-generating device according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the assembly relationship of the vibrator, the coil, the second elastic member and the housing in the multifunctional sound-generating device according to an embodiment of the present invention;

[0021] Figure 5 is a schematic structural diagram of a second elastic member in a multifunctional sound-generating device according to an embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the assembly relationship between the sound-generating unit, the first elastic member and the shell in the multifunctional sound-generating device according to an embodiment of the present invention. [Specific implementation method]

[0023] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0024] The present invention provides a multifunctional sound-generating device which can be used in electronic equipment to provide feedback prompts by emitting sound or by vibrating. Figures 1 to 6A multifunctional sound-emitting device includes a shell 1 with a receiving cavity 11 and a sound-emitting unit 2 suspended in the receiving cavity 11, the sound-emitting unit 2 includes a basin frame 21, a vibration system 22 fixed in the basin frame 21, and a magnetic circuit system 23 driving the vibration system 22 to vibrate and generate sound along a first direction and having a magnetic gap 231. The multifunctional sound-emitting device also includes a vibrator 4 suspended in the receiving cavity 11 and located on a side of the magnetic circuit system 23 away from the vibration system 22, and a coil 5 assembled on the vibrator 4. The magnetic circuit system 23 interacts with the coil 5 to drive the vibrator 4 to vibrate reciprocatingly in a second direction, and at the same time, the magnetic circuit system 23 drives the sound-emitting unit 2 to vibrate in the second direction, and the second direction is perpendicular to the first direction.

[0025] It should be understood that the vibration system 22 of the speaker vibrates and makes sound along the first direction under the drive of the magnetic circuit system 23, the vibrator 4 of the motor vibrates back and forth along the second direction under the interaction of the magnetic circuit system 23 and the coil 5, and the sound-emitting unit 2 vibrates back and forth along the second direction driven by the magnetic circuit system 23, so that the speaker and the motor share a magnetic circuit system 23, and the sound-emitting unit 2 and the vibrator 4 are assembled in a shell 1, which greatly reduces the space occupied; the sound-emitting unit 2 and the vibrator 4 form a dual vibration system 22, and the sound-emitting unit 2 can not only make sound but also vibrate in coordination with the vibrator 4, which not only improves the vibration effect but also avoids adding additional components, thereby further saving space.

[0026] See also Figure 1 , Figure 2 and Figure 3 Furthermore, the multifunctional sound-emitting device also includes a first elastic member 6 respectively connected to the shell 1 and the sound-emitting unit 2, and a second elastic member 7 respectively connected to the shell 1 and the vibrator 4, that is, the sound-emitting unit 2 is suspended in the receiving cavity 11 through the first elastic member 6, and the vibrator 4 is suspended in the receiving cavity 11 through the second elastic member 7.

[0027] See also Figure 1 In one embodiment, the first elastic member 6 is disposed on opposite sides of the sound-generating monomer 2 along the second direction, and the first elastic member 6 is spaced from the second elastic member 7 along the first direction. Specifically, the two first elastic members 6 are symmetrically disposed on both sides of the basin frame 21, and the sound-generating monomer 2 is disposed between the two first elastic members 6, so that the magnetic circuit system 23 can drive the sound-generating monomer 2 to move along the second direction; the first elastic member 6 is spaced from the second elastic member 7, so as to ensure that the vibrations between the sound-generating monomer 2 and the vibrator 4 do not interfere with each other.

[0028] See also Figure 1 , Figure 2 and Figure 3In one embodiment, the sound-emitting monomer 2 further includes an upper cover 24 disposed on the side of the basin frame 21 away from the magnetic circuit system 23, and the first elastic member 6 connects the shell 1 and the upper cover 24 respectively. Specifically, the upper cover 24 is adapted to the basin frame 21, and the first elastic member 6 includes a first elastic arm fixedly connected to the shell 1, a second elastic arm fixedly connected to the upper cover 24, and an elastic force portion fixedly connected to the first elastic arm and the second elastic arm respectively, and a gap is provided between the first elastic arm and the second elastic arm; the first elastic member 6 is U-shaped, the side plate surface of the first elastic arm is connected to the shell 1, and the side plate surface of the second elastic arm is connected to the upper cover 24. When the magnetic circuit system 23 drives the sound-emitting monomer 2 to move in the second direction, the second elastic arm moves in a direction close to the first elastic arm, and at this time the gap between the first elastic arm and the second elastic arm becomes smaller; when the first elastic member 6 drives the sound-emitting monomer 2 to recover, the second elastic arm moves in a direction away from the first elastic arm, and at this time the gap between the first elastic arm and the second elastic arm becomes larger. Preferably, gaskets are fixed on opposite sides of the first elastic arm and the second elastic arm, and the gaskets can buffer the collision between the second elastic arm and the first elastic arm, thereby preventing the first elastic member 6 from being damaged due to the collision between the second elastic arm and the first elastic arm. According to actual needs, the first elastic member 6 can also be V-shaped, compressed spring-shaped, etc., and the gasket can be made of elastic materials such as foam, rubber, and silicone.

[0029] See also Figure 2 , Figure 3 and Figure 4 In one embodiment, the vibrator 4 includes a main body 41 suspended in the shell 1, two side walls 42 formed by bending and extending from opposite ends of the main body 41 toward the direction of the sound-emitting unit 2, and two mass blocks 43 respectively fixedly connected to the main body 41, and the two mass blocks 43 are arranged at intervals and located between the two side walls 42. Specifically, the main body 41 can be a flat plate, and the mass block 43 is fixed to the plate surface of the main body 41 away from the shell 1. The mass block 43 can increase the movement inertia of the vibrator 4 and make the vibration effect better. Among them, the side of the mass block 43 close to the shell 1 is in contact with the side wall 42, that is, the mass block 43 is aligned with the side wall 42, which is conducive to quickly and accurately fixing the mass block 43 on the main body 41; the main body 41, the side wall 42 and the mass block 43 are symmetrically arranged, which further improves the vibration effect of the vibrator 4.

[0030] See also Figure 3 and Figure 4In one embodiment, the second elastic member 7 includes a bearing portion 71 assembled on the main body 41, and two elastic structures 72 whose two ends are respectively fixedly connected to the bearing portion 71 and the housing 1 and are spaced apart at opposite sides of the bearing portion 71 along the second direction, and the two elastic structures 72 are at least partially fixed to the side wall 42. The bearing portion 71 is used to bear the vibrator 4, specifically, the main body 41 is fixed to the plate surface of the bearing portion 71, and the vibrator 4 is suspended in the receiving cavity 11 through the elastic structure 72.

[0031] See also Figure 4 and Figure 5 Specifically, the elastic structure 72 includes a first connection portion 721 fixedly connected to one end of the bearing portion 71 and located between the side wall portion 42 and the housing 1, an elastic portion 722 formed by bending from one end of the first connection portion 721 toward the direction of the vibrator 4, and a second connection portion 723 formed by bending from one end of the elastic portion 722 away from the first connection portion 721 toward the direction of the vibrator 4, the second connection portion 723 is fixedly connected to the housing 1, and the first connection portion 721 and the second connection portion 723 are arranged opposite to each other. The first connection portion 721 is at least partially attached to the side wall portion 42. Among them, the first connection portion 721, the elastic portion 722 and the second connection portion 723 are all in the shape of a side plate, and the connection between the second connection portion 723 and the elastic portion 722 is elastic. When the vibrator 4 moves along the second direction under the interaction between the magnetic circuit system 23 and the coil 5, the mass block 43 drives the elastic structure 72 to deform.

[0032] See also Figure 2 and Figure 3 In one embodiment, the magnetic circuit system 23 includes a main magnetic steel 232 and a secondary magnetic steel 233 arranged around the main magnetic steel 232 to form a magnetic gap 231. The main body 41 is provided with a mounting slot 411 adapted to the coil 5. The coil 5 is mounted in the mounting slot 411, and along the first direction, the coil 5 is arranged opposite to the magnetic gap 231. Specifically, the coil 5 is provided with two mounting slots 411 arranged at intervals in the main body 41, and the coil 5 is installed in the corresponding mounting slots 411, which saves the space occupied by the coil 5 and is conducive to the thinness of the vibrator 4; the long side of the coil 5 is perpendicular to the second direction, and the short side is parallel to the second direction, so that the coil 5 can interact with the magnetic circuit system 23 to realize the reciprocating vibration of the vibrator 4 along the second direction. Since the coil 5 is arranged opposite to the magnetic gap 231, the main magnetic steel 232 and the auxiliary magnetic steel 233 can both cooperate to apply magnetic force to the coil 5. The magnetic forces applied by the main magnetic steel 232 and the auxiliary magnetic steel 233 to the coil 5 respectively make the coil 5 move in the same direction, which is more conducive to the vibration of the vibrator 4. According to actual needs, the inner magnetic circuit or the winding hole of the coil 5 is opposite to the magnetic gap 231; the bearing part 71 is provided with a clearance groove 711, and the clearance groove 711 exposes the coil 5 in the receiving cavity 11, which is convenient for the heat dissipation and cooling of the coil 5.

[0033] See also Figure 2 and Figure 3 , further, the main magnetic steel 232 includes an upper magnetic steel 2321 and a lower magnetic steel 2322 with the same magnetic poles facing each other, and the magnetic circuit system 23 also includes a main pole core 234 with two sides respectively abutting against the upper magnetic steel 2321 and the lower magnetic steel 2322, and a secondary pole core 235 attached to the secondary magnetic steel 233; the secondary magnetic steel 233 and the lower magnetic steel 2322 have opposite magnetic pole directions; the secondary magnetic steel 233 and the upper magnetic steel 2321 have the same magnetic pole direction. Specifically, the upper magnetic steel 2321 and the lower magnetic steel 2322 are fixedly connected to the two sides of the main pole core 234, respectively, and the secondary pole core 235 is fixedly connected to the side of the secondary magnetic steel 233 away from the vibrator 4; the south pole of the upper magnetic steel 2321 is opposite to the south pole of the lower magnetic steel 2322, the magnetic pole directions of the upper magnetic steel 2321 and the lower magnetic steel 2322 are opposite, and the magnetic pole directions of the secondary magnetic steel 233 and the lower magnetic steel 2322 are opposite. Preferably, the upper magnetic steel 2321 and the auxiliary magnetic steel 233 are both north poles at the top and south poles at the bottom; the lower magnetic steel 2322 is south pole at the top and north pole at the bottom. According to actual needs, the upper magnetic steel 2321 and the lower magnetic steel 2322 are both rectangular parallelepipeds, the auxiliary magnetic steel 233 is annular, and the auxiliary magnetic steel 233 is consistent in height with the lower magnetic steel 2322.

[0034] See also Figure 2 , Figure 3 and Figure 6 In one embodiment, the vibration system 22 includes a diaphragm 221 connected to the basin frame 21, a spherical frame 222 connected to the diaphragm 221, and a voice coil 223 inserted in the magnetic gap 231 and connected to the spherical frame 222. Specifically, the diaphragm 221 includes a first folded ring connected to the basin frame 21 and the spherical frame 222, respectively, and a second folded ring connected to the inner edge of the first folded ring and the main magnetic steel 232, respectively. The first folded ring is arranged between the basin frame 21 and the upper cover 24. At least part of the first folded ring is convex in the direction close to the vibrator 4 to form a first arc surface, and at least part of the second folded ring is convex in the direction away from the vibrator 4 to form a second arc surface, which is conducive to the vibration of the diaphragm 221 along the first direction. When the magnetic circuit system 23 drives the vibration system 22 to vibrate and produce sound along a first direction, the voice coil 223 drives the diaphragm 221 to vibrate along the first direction through the ball-top frame 222. Specifically, after the voice coil 223 is energized, under the action of the main magnet 232 and the auxiliary magnet 233, the voice coil 223 vibrates along the first direction in the magnetic gap 231, thereby driving the diaphragm 221 to vibrate, thereby realizing the vibration and sound production of the sound unit 2; during the vibration process of the diaphragm 221, the ball-top frame 222 can enhance the strength of the sound unit 2, improve the acoustic performance of the sound unit 2, and thus improve the overall sound quality of the sound unit 2.

[0035] The vibration system 22 further includes a flexible circuit board 224 whose two ends are respectively fixedly connected to the basin frame 21 and the ball top frame 222. The flexible circuit board 224 is arranged on the side of the basin frame 21 away from the upper cover 24. Two flexible circuit boards 224 are provided, which is conducive to the symmetrical arrangement of the vibration system 22, thereby improving the vibration effect of the vibration system 22. It should be understood that the circuits where the voice coil 223 and the coil 5 are located are arranged independently of each other, so that the voice coil 223 and the coil 5 can work separately or simultaneously, which is convenient to meet the requirements of different application scenarios on whether the coil 5 and the voice coil 223 work or not.

[0036] The above are merely embodiments of the present invention. It should be pointed out that, for those skilled in the art, improvements can be made without departing from the creative concept of the present invention, but these all fall within the protection scope of the present invention.

Claims

1. A multifunctional sound-generating device, comprising a shell having a receiving cavity and a sound-generating unit suspended in the receiving cavity, wherein the sound-generating unit comprises a basin frame, a vibration system fixed in the basin frame, and a magnetic circuit system having a magnetic gap for driving the vibration system to vibrate in a first direction to generate sound, It is characterized in that The multifunctional sound-emitting device also includes a vibrator suspended in the receiving cavity and located on the side of the magnetic circuit system away from the vibration system, and a coil assembled on the vibrator. The magnetic circuit system interacts with the coil to drive the vibrator to vibrate back and forth in a second direction, and at the same time, the magnetic circuit system drives the sound-emitting unit to vibrate back and forth in the second direction, and the second direction is perpendicular to the first direction.

2. The multifunctional sound-generating device according to claim 1, It is characterized in that The multifunctional sound-generating device further comprises a first elastic member connected to the shell and the sound-generating unit respectively, and a second elastic member connected to the shell and the vibrator respectively.

3. The multifunctional sound-generating device according to claim 2, It is characterized in that The first elastic member is disposed on two opposite sides of the sound-emitting unit along the second direction, and along the first direction, the first elastic member is spaced apart from the second elastic member.

4. The multifunctional sound-generating device according to claim 3, It is characterized in that The sound-generating unit further comprises an upper cover arranged on a side of the basin frame away from the magnetic circuit system, and the first elastic member is respectively connected to the shell and the upper cover.

5. The multifunctional sound-generating device according to claim 2, It is characterized in that The vibrator includes a main body suspended in the shell, two side walls bent and extended from opposite ends of the main body toward the sound-emitting unit, and two mass blocks respectively fixedly connected to the main body, and the two mass blocks are arranged at intervals and located between the two side walls.

6. The multifunctional sound-generating device according to claim 5, It is characterized in that The second elastic member includes a bearing portion assembled on the main body, and two elastic structures whose two ends are respectively fixedly connected to the bearing portion and the shell and are spaced apart at opposite sides of the bearing portion along the second direction, and the two elastic structures are at least partially fixed to the side wall portion.

7. The multifunctional sound-generating device according to claim 6, It is characterized in that The elastic structure includes a first connecting portion fixedly connected to one end of the bearing portion and located between the side wall portion and the shell, an elastic portion bent from one end of the first connecting portion toward the vibrator, and a second connecting portion bent from one end of the elastic portion away from the first connecting portion and fixedly connected to the shell, the first connecting portion and the second connecting portion are arranged opposite to each other, and the first connecting portion is at least partially attached to the side wall portion.

8. The multifunctional sound-generating device according to claim 5, It is characterized in that The main body is provided with a mounting through slot matched with the coil, the coil is assembled in the mounting through slot, and along the first direction, the coil is arranged opposite to the magnetic gap.

9. The multifunctional sound-generating device according to claim 1, It is characterized in that The magnetic circuit system includes a main magnet and a secondary magnet arranged around the main magnet to form the magnetic gap. The vibration system includes a diaphragm connected to the basin frame, a ball-top frame connected to the diaphragm, and a voice coil inserted in the magnetic gap and connected to the ball-top frame.

10. The multifunctional sound-generating device according to claim 9, It is characterized in that The main magnetic steel comprises an upper magnetic steel and a lower magnetic steel with the same magnetic poles facing each other, and the magnetic circuit system further comprises a main pole core respectively abutting against the upper magnetic steel and the lower magnetic steel on both sides, and a secondary pole core attached to the secondary magnetic steel; the secondary magnetic steel and the lower magnetic steel have opposite magnetic pole directions; The auxiliary magnetic steel has the same magnetic pole direction as the upper magnetic steel.

Images