Sound generation apparatus

Abstract

A sound generation apparatus (100), comprising: a housing (110), which is provided with an accommodating space therein; and a loudspeaker assembly (120) and a motor assembly (130), which are accommodated in the accommodating space. The loudspeaker assembly (120) comprises a vibration system (121), and a magnetic circuit system (122) for driving the vibration system (121) to vibrate in a first direction to generate sound. The motor assembly (130) comprises vibrators (131), and stators (132) for driving the vibrators (131) to vibrate in a second direction, wherein the stators (132) are fixed to the housing (110) and are distributed on the outer side of the magnetic circuit system (122) in the second direction, and the vibrators (131) are suspended in the accommodating space and are respectively distributed on the outer side of the stators (132) in the second direction, the first direction being perpendicular to the second direction. The sound generation apparatus (100) does not need to stack magnetic circuits in the same direction, such that the formed device is relatively thin, and thus the efficiency of the loudspeaker assembly (120) and the motor assembly (130) is higher.

Description

A sound-generating device Technical Field

[0001] The embodiments of the present invention belong to the field of electroacoustic technology, and particularly relate to a sound-generating device. Background Art

[0002] With the development of electronic technology, portable consumer electronic devices are becoming more and more popular, such as smart phones, handheld game consoles, tablet computers, etc. These electronic devices generally interact with users through sound playback and / or vibration sensing.

[0003] In the prior art, the sound playback and vibration sensing of electronic devices are achieved through speakers and motors respectively. The speakers and motors are independent components. The more components there are, the more difficult it is to assemble the electronic device, and the more internal space is required.

[0004] Although there have been proposals to combine the speaker and vibration motor into one, for example, using a dynamic coil structure, the speaker and motor share the same drive coil, and the sound diaphragm and the motor vibrator vibrate in the same direction, this solution stacks the magnetic circuits in the same direction, resulting in a thicker device, a more complex dynamic coil structure, and weaker speaker and motor performance. Summary of the Invention

[0005] The embodiments of the present invention aim to solve at least one of the technical problems existing in the prior art and provide a sound-generating device.

[0006] An embodiment of the present invention provides a sound-generating device, comprising a housing having a receiving space, a speaker assembly and a motor assembly received in the receiving space; the speaker assembly comprises a vibration system, and a magnetic circuit system for driving the vibration system to vibrate in a first direction to generate sound; wherein,

[0007] The motor assembly includes a vibrator and a stator that drives the vibrator to vibrate along a second direction; the stator is fixed to the shell and distributed outside the magnetic circuit system along the second direction, and the vibrator is suspended in the receiving space and distributed outside the stator along the second direction; the first direction is perpendicular to the second direction.

[0008] Optionally, the stator is a solenoid and the vibrator is a magnet.

[0009] Optionally, the magnetic steel includes three segmented magnetized magnetic steel units, and the three magnetic steel units are arranged in sequence along the axial direction of the solenoid; wherein the polarities of two adjacent magnetic steel units are opposite.

[0010] Optionally, the magnet includes three fixed sub-magnets, and the three sub-magnets are arranged in sequence along the axis direction of the solenoid; wherein the polarities of two adjacent sub-magnets are opposite.

[0011] Optionally, the stator includes two solenoids symmetrically distributed on both sides of the magnetic circuit system along the second direction; the vibrator includes two magnets symmetrically distributed on the outside of the solenoid along the second direction.

[0012] Optionally, the sound-generating device further includes an elastic connecting member and a mass block;

[0013] The first end of the elastic connector is fixed to the housing, and the second end of the elastic connector is connected to the mass block, so as to suspend the mass block in the receiving space; the vibrator is fixedly connected to the mass block.

[0014] Optionally, the magnetic circuit system includes a lower clamping plate fixed to the housing, a first main magnet disposed on a side of the lower clamping plate facing the vibration system, and a secondary magnet disposed around an outer side of the first main magnet, wherein the first main magnet and the secondary magnet have opposite polarities and a magnetic gap is defined between them.

[0015] The magnetic circuit system also includes a second main magnetic steel arranged on the side of the first main magnetic steel away from the lower clamping plate, and the opposite sides of the first main magnetic steel and the second main magnetic steel have the same polarity; the stator is distributed on the outside of the lower clamping plate along the second direction.

[0016] Optionally, the sound-generating device further includes a pole core mounted on the auxiliary magnetic steel;

[0017] Two opposite sides of the pole core are respectively provided with a clearance groove corresponding to the motor assembly along the second direction, and the pole core is opened with an avoidance hole corresponding to the magnetic gap and the first main magnetic steel along the first direction.

[0018] Optionally, the sound-producing device further includes a supporting frame fixed to the pole core, the vibration system includes a diaphragm fixed between the supporting frame and the second main magnet and a voice coil driving the diaphragm to produce sound, and the voice coil is inserted in the magnetic gap.

[0019] Optionally, the sound-generating device further includes a flexible circuit board connected to the supporting frame, wherein the flexible circuit board is electrically connected to the voice coil; and

[0020] The bottom wall of the shell is provided with a clamping plate through hole corresponding to the lower clamping plate, and the top wall of the shell is formed with a recessed portion abutting against the second main magnetic steel.

[0021] The sound-emitting device of an embodiment of the present invention arranges a speaker assembly in a first direction and a motor assembly in a second direction, so that the motor assembly and the speaker assembly are located in two directions perpendicular to each other. The two do not need to be stacked, making the sound-emitting device thinner and the efficiency of the speaker assembly and the motor assembly higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the three-dimensional structure of a sound-generating device according to an embodiment of the present invention;

[0023] FIG2 is a cross-sectional view of a sound-generating device along line AA according to another embodiment of the present invention;

[0024] FIG3 is a cross-sectional view of a sound-generating device along line BB according to another embodiment of the present invention;

[0025] FIG4 is a top view of a sound-generating device according to another embodiment of the present invention;

[0026] FIG5 is an exploded view of the three-dimensional structure of a sound-generating device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] As shown in Figures 1 to 5, a sound-generating device 100 includes a housing 110 having a receiving space, a speaker assembly 120 and a motor assembly 130 received in the receiving space. The speaker assembly 120 includes a vibration system 121 and a magnetic circuit system 122 that drives the vibration system 121 to vibrate in a first direction to generate sound. The motor assembly 130 includes a vibrator 131 and a stator 132 that drives the vibrator 131 to vibrate in a second direction. The stator 132 is fixed to the housing 110 and is distributed outside the magnetic circuit system 122 along the second direction. The vibrator 131 is suspended in the receiving space and is distributed outside the stator 132 along the second direction. The first direction is perpendicular to the second direction.

[0029] In the embodiment of the present invention, the first direction refers to the Z-axis direction, such as the Z-axis direction indicated by the arrow in Figure 3. The second direction refers to the Y-axis direction, such as the Y-axis direction indicated by the arrow in Figure 3. That is, the vibration system vibrates along the Z-axis direction, forming Z-axis sound vibration, and the vibrator vibrates along the Y-axis direction, forming Y-axis motor vibration. The motor assemblies distributed on both sides of the magnetic circuit system along the Y-axis direction can reduce the thickness of the sound-generating device in the Z-axis direction, significantly reducing the overall thickness of the device, enabling the device to meet the ultra-thin requirements in the Z-axis direction.

[0030] Specifically, as shown in Figures 1 and 5, the shell 110 includes an upper shell and a lower shell, and the upper and lower shells are enclosed to form a shell 110 with a receiving space. The speaker assembly 120 and the motor assembly 130 are both accommodated in the receiving space of the shell 110. The upper shell is provided with a sound outlet 111, and the magnetic circuit system 122 drives the vibration system 121 to vibrate and make sound along a first direction, and outputs the sound through the sound outlet 111. The vibration system 121 and the magnetic circuit system 122 are both arranged in the receiving space of the shell 110 along the first direction. The stator 132 is fixed on the bottom wall of the lower shell and is distributed on the outside of the magnetic circuit system 122 along the second direction. The vibrator 131 is suspended in the receiving space of the shell 110 and is distributed on the outside of the stator 132 along the second direction. The stator 132 fixed on the bottom wall of the lower shell drives the corresponding vibrator 131 to vibrate.

[0031] The sound-emitting device of an embodiment of the present invention can vibrate and emit sound along the first direction through the speaker assembly arranged along the first direction, and can vibrate along the second direction through the motor assembly distributed outside the speaker assembly arranged along the second direction. Distributing the motor assembly outside the speaker assembly along the second direction can reduce the thickness of the sound-emitting device in the first direction, avoid stacking the speaker assembly and the motor assembly in the same direction, effectively reduce the total thickness of the device, and enable the device to meet the ultra-thin requirement in the first direction.

[0032] Furthermore, as shown in FIG. 2 and FIG. 5 , the stator 132 is a solenoid, and the vibrator 131 is a magnetic steel.

[0033] Specifically, as shown in Figures 2 and 5, the stator 132 is configured as a solenoid and fixed to the housing 110. The axis of the solenoid is perpendicular to the first direction and parallel to the second direction. That is, the solenoid is horizontally fixed to the inner bottom wall of the lower housing along its axis. The vibrator 131 is configured as a magnetic steel and suspended within the housing 110. The axis of the magnetic steel is parallel to the axis of the solenoid, and a pole core is sandwiched between the magnetic steel and the side wall of the lower housing. The fixed solenoid drives the magnetic steel to vibrate in the second direction. This dynamic magnetic structure is simple and reliable, and will not interfere with the speaker assembly.

[0034] As a specific example, the magnet includes three segmented magnet units, arranged sequentially along the axis of the solenoid, with adjacent magnet units having opposite polarities. That is, the polarity of a magnet unit located in the middle is opposite to the polarity of the other two magnet units located on either side of the magnet unit, and the magnets are arranged in an integrated segmented magnetization manner. As another specific example, the magnet includes three fixed sub-magnets, arranged sequentially along the axis of the solenoid, with adjacent sub-magnets having opposite polarities. That is, the polarity of a sub-magnet located in the middle is opposite to the polarity of the other two sub-magnets located on either side of the sub-magnet, and the magnets are arranged in a split assembly manner.

[0035] The sound-generating device of an embodiment of the present invention utilizes a fixed solenoid to drive the magnet to vibrate along the second direction. The dynamic magnetic structure is simple and stable and reliable, which enables the sound-generating device to vibrate stably along the second direction under the drive of the motor assembly, thereby effectively improving the performance of the sound-generating device.

[0036] 2 and 5 , the stator 132 includes two solenoids symmetrically distributed along the second direction on both sides of the magnetic circuit system 122. The vibrator 131 includes two magnets symmetrically distributed along the second direction outside the solenoid.

[0037] Specifically, as shown in Figures 2 and 5, vibrator 131 includes two magnets, which are symmetrically distributed along the second direction on opposite sides of magnetic circuit system 122. Stator 132 includes two solenoids, each corresponding to the two magnets, and symmetrically distributed along the second direction between magnetic circuit system 122 and the corresponding magnets. By symmetrically distributing the two solenoids and two magnets along the second direction on opposite sides of magnetic circuit system 122, the overall structure of the sound-generating device is more balanced and stable, enabling stable vibration along the second direction and improving its durability.

[0038] For example, as shown in Figures 2 to 5, the sound-generating device 100 further includes an elastic connector 134 and a mass 133. A first end of the elastic connector 134 is fixed to the housing 110, and a second end of the elastic connector 134 is connected to the mass 133, thereby suspending the mass 133 within the receiving space. The vibrator 131 is fixedly connected to the mass 133.

[0039] Specifically, as shown in Figures 2 to 5, an elastic connector 134 is annularly disposed on the inner bottom wall of the lower housing. A first end of the elastic connector 134 is fixed to the inner bottom wall of the lower housing, and a mass block 133 is fixedly disposed on the second end of the elastic connector 134. The mass block 133 is connected to the vibrator 131. The elastic connector allows the mass block and the vibrator connected to the mass block to be suspended within the housing space of the housing. The elastic connector and the mass block cooperate to provide a weighted balance to the vibrator, thereby enhancing the vibration effect of the vibrator and improving the acoustic vibration performance of the sound-generating device. The vibrator's swaying can also be balanced, thereby increasing the stability of the sound-generating device.

[0040] Furthermore, the elastic connectors 134 are respectively provided on opposite sides of the axial direction of the vibrator 131. As a specific example, as shown in FIG5 , two elastic connectors 134 are provided, and the two elastic connectors 134 are centrally symmetrically distributed on opposite sides of the vibrator 131 along the axial direction of the vibrator 131. One end of the elastic connector 134 is connected to the housing 110, and the other end of the elastic connector 134 is connected to the mass block 133. The elastic connector can be provided as an L-shaped spring. Of course, the elastic connector can also be provided as a V-shaped or C-shaped spring, and this embodiment does not impose any specific restrictions on this. By providing the elastic connector, the acoustic vibration performance of the sound-generating device can be further enhanced.

[0041] For example, as shown in Figures 2 to 5, the magnetic circuit system 122 includes a lower clamping plate 1221 fixed to the housing 110, a first main magnet 1222 disposed on the side of the lower clamping plate 1221 facing the vibration system 121, and a secondary magnet 1223 disposed outside the main magnet 1222. The first main magnet 1222 and the secondary magnet 1223 have opposite polarities and a magnetic gap is defined between them. The magnetic circuit system 122 also includes a second main magnet 180 disposed on the side of the first main magnet 1222 facing away from the lower clamping plate 1221. The opposite sides of the first main magnet 1222 and the second main magnet 180 have the same polarity. The stator 132 is distributed outside the lower clamping plate 1221 along the second direction.

[0042] Specifically, as shown in Figures 2 to 5 , the bottom wall of the lower housing is provided with a clamping plate through-hole 170. A lower clamping plate 1221 is provided corresponding to the clamping plate through-hole 170. A first main magnet 1222 and a secondary magnet 1223 are fixed to the lower clamping plate 1221. Both the first main magnet 1222 and the secondary magnet 1223 are housed within the housing 110. The secondary magnet 1223 is circumferentially disposed around the first main magnet 1222, forming a magnetic gap between the first main magnet 1222 and the secondary magnet 1223. The polarities of the first main magnet 1222 and the secondary magnet 1223 are opposite. As described below, this magnetic gap is used to insert a voice coil, which drives the diaphragm to vibrate and produce sound. A second main magnetic steel 180 is disposed on the side of the first main magnetic steel 1222 facing the upper housing. A pole core is sandwiched between the first main magnetic steel 1222 and the second main magnetic steel 180. The opposing sides of the first main magnetic steel 1222 and the second main magnetic steel 180 have the same polarity. It should be noted that a recessed portion 112 is also formed on the top wall of the upper housing to abut against the second main magnetic steel 180.

[0043] The sound-generating device of an embodiment of the present invention arranges both the first main magnet and the auxiliary magnet on the lower clamping plate, thereby eliminating the need for the lower clamping plate to be partially cut off to avoid the motor coil, thereby enabling the magnetic circuit to be completely closed, resulting in a better magnetic circuit, a higher efficiency of the magnetic circuit structure, and improved overall performance of the sound-generating device.

[0044] For example, as shown in Figures 2 to 5, the sound-generating device 100 further includes a pole core 140 mounted on the secondary magnet 1223. Two opposing sides of the pole core 140 are provided with through slots 1311 corresponding to the motor assembly 130 along the second direction. The pole core 140 is also provided with through holes 1312 corresponding to the magnetic gap and the first main magnet 1222 along the first direction.

[0045] Specifically, as shown in Figures 2 to 5, the pole core 140 is mounted on the side of the secondary magnet 1223 facing the vibration system 121. Two opposing sides of the pole core 140 are provided with clearance slots 1311 along the second direction. When the pole core 140 is secured to the secondary magnet 1223, the clearance slots 1311 on the opposing sides of the pole core 140 are positioned away from the motor assembly 130, thereby preventing the pole core 140 from interfering with the design layout of the stator 132 and vibrator 131. The pole core 140 also has a clearance hole 1312 along the first direction. When the pole core 140 is secured to the secondary magnet 1223, the clearance hole 1312 on the pole core 140 is positioned away from the magnetic gap and the first main magnet 1222. This ensures that the magnetic gap and the first main magnet 1222 are both within the range of the clearance hole 1312, allowing the voice coil to drive the diaphragm to vibrate in the first direction within the magnetic gap to produce sound.

[0046] Exemplarily, as shown in Figures 2 to 5, the sound-emitting device 100 also includes a supporting frame 150 fixed to the pole core 140, the vibration system 121 includes a diaphragm 1211 fixed between the supporting frame 150 and the second main magnet 180, and a voice coil 1212 that drives the diaphragm 1211 to produce sound, and the voice coil 1212 is inserted in the magnetic gap.

[0047] Specifically, as shown in Figures 2 to 5, one end of the support frame 150 is fixedly connected to the pole core 140, and the other end thereof is supported by the edge area of ​​the diaphragm 1211. The diaphragm 1211 is fixed between the support frame 150 and the second main magnetic steel 180. The central area of ​​the diaphragm 1211 is provided with an opening, the size of which corresponds to the size of the second main magnetic steel 180. The second main magnetic steel 180 is sandwiched between the diaphragm 1211 and the first main magnetic steel 1222, and the pole core is sandwiched between the second main magnetic steel 180 and the first main magnetic steel 1222. One end of the second main magnetic steel 180 is connected to the first main magnetic steel 1222 via the pole core, and the other end thereof abuts the opening provided in the diaphragm 1211. The voice coil 1212 is connected to the diaphragm 1211 and is suspended in a magnetic gap formed by the first main magnet 1222 and the secondary magnet 1223. When the voice coil 1212 vibrates up and down along the first direction in the magnetic gap, the voice coil 1212 can drive the diaphragm 1211 to vibrate up and down along the first direction to produce sound, and the sound can be transmitted through the sound outlet 111 provided in the upper shell.

[0048] The sound-generating device of the embodiment of the present disclosure can suspend the diaphragm in the receiving space of the shell through the provided support frame and the second main magnet, and utilize the vibration of the voice coil to drive the diaphragm to vibrate and generate sound.

[0049] For example, as shown in Figures 3 to 5, the sound-generating device 100 further includes a flexible circuit board 160 connected to the support frame 150. The flexible circuit board 160 is electrically connected to the voice coil 1212. As an example, two flexible circuit boards 160 are provided, symmetrically distributed on both sides of the stator 132 along its axis and connected to the support frame 150. The two flexible circuit boards 160 are electrically connected to the voice coil 1212 to provide power to the voice coil 1212.

[0050] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A sound generating device, characterized in that, the sound generating device includes a housing having a receiving space, a speaker assembly and a motor assembly received in the receiving space; the speaker assembly includes a vibration system and a magnetic circuit system for driving the vibration system to vibrate and generate sound in a first direction; wherein, the motor assembly includes an oscillator and a stator for driving the oscillator to vibrate in a second direction; the stator is fixed to the housing and distributed outside the magnetic circuit system in the second direction, and the oscillator is suspended in the receiving space and distributed outside the stator in the second direction; the first direction is perpendicular to the second direction.

2. The sound generating device according to claim 1, characterized in that, the stator is a solenoid and the oscillator is a permanent magnet.

3. The sound generating device according to claim 2, characterized in that, the permanent magnet includes three magnet units magnetized in sections, and the three magnet units are arranged in sequence along the axis direction of the solenoid; wherein, the polarities of two adjacent magnet units are opposite.

4. The sound generating device according to claim 2, characterized in that, the permanent magnet includes three fixed sub-magnets, and the three sub-magnets are arranged in sequence along the axis direction of the solenoid; wherein, the polarities of two adjacent sub-magnets are opposite.

5. The sound generating device according to claim 1, characterized in that, the stator includes two solenoids symmetrically distributed on both sides of the magnetic circuit system in the second direction; the oscillator includes two permanent magnets symmetrically distributed outside the solenoids in the second direction.

6. The sound generating device according to any one of claims 1 to 5, characterized in that, the sound generating device further includes an elastic connecting member and a mass block; a first end of the elastic connecting member is fixed to the housing, and a second end of the elastic connecting member is connected to the mass block to suspend the mass block in the receiving space; the oscillator is fixedly connected to the mass block.

7. The sound generating device according to any one of claims 1 to 5, characterized in that, the magnetic circuit system includes a lower clamping plate fixed to the housing, a first main magnet disposed on a side of the lower clamping plate facing the vibration system, and a secondary magnet surrounding the outside of the first main magnet, the polarities of the first main magnet and the secondary magnet are opposite and there is a magnetic gap between them; the magnetic circuit system further includes a second main magnet disposed on a side of the first main magnet facing away from the lower clamping plate, and the polarities of opposite sides of the first main magnet and the second main magnet are the same; the stator is distributed outside the lower clamping plate in the second direction.

8. The sound generating device according to claim 7, characterized in that, the sound generating device further includes a pole core disposed on the secondary magnet; corresponding relief through grooves for the motor assembly are respectively provided on two opposite side edges of the pole core along the second direction, and an avoidance through hole corresponding to the magnetic gap and the first main magnet is provided in the pole core along the first direction.

9. The sound generating device according to claim 8, characterized in that, The sound generating device further includes a support skeleton fixed to the pole core. The vibration system includes a diaphragm fixed between the support skeleton and the second main magnet, and a voice coil for driving the diaphragm to generate sound. The voice coil is inserted into the magnetic gap.

10. The sound generating device according to claim 9, wherein, the sound generating device further includes a flexible circuit board connected to the support skeleton, and the flexible circuit board is electrically connected to the voice coil; and, a clamping plate through hole corresponding to the lower clamping plate is formed in the bottom wall of the housing, and a recess for abutting against the second main magnet is formed in the top wall of the housing.

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