Sound Pronunciation Device

Abstract

The present invention provides a sound producing device. [Solution] The sound-producing device includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system includes a magnet steel unit fixed to the frame and a yoke connected to the magnet steel unit, the frame, the yoke and the vibration system together form a sound-producing inner cavity surrounding the sound-producing device, and the sound-producing device further includes a plastic packaging member injection-molded on the outer periphery of the yoke, the plastic packaging member has a plurality of leak holes formed therethrough to communicate the sound-producing inner cavity with the outside of the sound-producing device. By injection-molding the plastic packaging member for sealing and fixing to the yoke, and opening the leak holes in the plastic packaging member instead of the conventional ventilation isolation part, it is possible to save costs, and compared with the planar leak of the ventilation isolation part, the plastic openings can leak in the XYZ space, making the leak smoother. The sound-producing device of the present invention has smooth leak, good acoustic performance, and good user experience effect.

Description

[Technical field]

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to sound producing devices. [Background technology]

[0002] 2. Description of the Related Art A sound generating device is one of the main devices in a mobile terminal such as a mobile phone, and is mainly used to convert electrical signals into acoustic signals, as well as in earphones.

[0003] A sound-producing device in the prior art includes a frame, a vibration system fixed to the frame, and a magnetic circuit system having a magnetic gap. The vibration system includes a diaphragm for vibration production fixed to the frame, and a voice coil inserted into the magnetic gap to drive the diaphragm to vibrate. The frame, the vibration system, and the magnetic circuit system are all surrounded to form a sound-producing cavity, and in order to prevent dust from entering the sound-producing cavity of the sound-producing device and at the same time ensure that the air in the sound-producing cavity leaks well to balance the sound pressure, a ventilation isolation part (Mesh) is usually injection molded on the frame or a ventilation isolation part is implemented in the yoke to achieve dust prevention and leakage.

[0004] However, in the sound device of the prior art, when the ventilation isolation parts are injection molded on the frame and when the ventilation isolation parts are mounted on the yoke to achieve leakage, the mounting of the ventilation isolation parts reduces the assembly efficiency, and the flexibility of the ventilation isolation parts only allows leakage in one direction, limiting the fluency of the leakage and resulting in poor acoustic performance of the sound device.

[0005] Therefore, in order to solve the above technical problems, it is necessary to provide a new sound generating device. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a sound generating device that has smooth leakage and good acoustic performance. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention provides a sound-producing device, which includes a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system to vibrate, the magnetic circuit system including a magnet steel unit fixed to the frame and a yoke connected to the magnet steel unit, the frame, the yoke and the vibration system together surrounding and forming a sound-producing inner cavity, and the sound-producing device further includes a plastic packaging member that is injection molded on the outer periphery of the yoke, and the plastic packaging member has a plurality of leak holes formed therethrough that connect the sound-producing inner cavity to the outside of the sound-producing device.

[0008] Preferably, the plastic packaging member includes a bottom wall fixed to the yoke and a side wall bent and extending from the bottom wall in a direction closer to the vibration system, the side wall being spaced apart from the magnet steel unit, and the leak hole being formed through the bottom wall and / or the side wall.

[0009] Preferably, the plurality of leak holes are arranged in an array.

[0010] Preferably, the sound producing device is rectangular, the plastic packaging members include four, and are spaced apart from each other at the four corners of the yoke.

[0011] Preferably, the sound producing device has a rectangular shape, and the plastic packaging members include two, each spaced apart from the other on two opposing short axis sides or two opposing long axis sides of the yoke.

[0012] Preferably, the plastic packaging member has an annular shape and is disposed so as to surround the periphery of the yoke.

[0013] Preferably, the leak hole is a rectangular hole and is formed through the side wall.

[0014] Preferably, the leak hole is a circular hole and is formed penetrating the bottom wall and / or the side wall.

[0015] Preferably, the magnet steel unit includes a main magnet steel and a sub-magnet steel that is arranged to surround the main magnet steel and is spaced apart to form a magnetic gap, and the vibration system includes a diaphragm fixed to the frame, a bobbin fixed to a side of the diaphragm close to the magnetic circuit system, a dome fixed to the bobbin, and a voice coil that drives the diaphragm to vibrate, the voice coil being fixed to the bobbin and inserted into the magnetic gap, and the plastic packaging member surrounding the outer periphery of the sub-magnet steel and spaced apart from the sub-magnet steel.

[0016] Preferably, the sound-producing device further includes four conductive elastic members spaced apart at the four corners of the sub-magnetic steel, the conductive elastic members being fixed to a bobbin and electrically connected to the voice coil. Effect of the Invention

[0017] Compared with the prior art, the sound device of the present invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system includes a magnet steel unit fixed to the frame and a yoke connected to the magnet steel unit, the frame, the yoke and the vibration system together form a sound-producing inner cavity surrounding the sound-producing device, and the sound-producing device further includes a plastic packaging member injection-molded on the outer periphery of the yoke, and the plastic packaging member has a plurality of leak holes penetrating therethrough that communicate the sound-producing inner cavity with the outside of the sound-producing device. By injection-molding the plastic packaging member for sealing and fixing to the yoke, and at the same time, opening leak holes in the plastic packaging member instead of the conventional ventilation isolation part, the ventilation isolation part can be omitted and costs can be saved, and compared with the plane leakage of the ventilation isolation part, the plastic opening can leak in the XYZ space, making the leakage smoother. [Brief description of the drawings]

[0018] In order to more clearly describe the technical solutions in the embodiments of the present invention, the drawings necessary for describing the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any inventive work, among which: [Figure 1] FIG. 1 is a perspective view showing the configuration of a sound producing device according to the present invention. [Diagram 2] FIG. 2 is an exploded view of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA of FIG. [Figure 4] FIG. 4 is an enlarged view of part B in FIG. [Diagram 5] FIG. 5 is a perspective view showing another sound generating device according to the present invention. [Figure 6] FIG. 6 is an exploded view of FIG. [Figure 7]FIG. 7 is a diagram showing the structure of the plastic packaging member of FIG. [Figure 8] FIG. 8 is a diagram showing the structure of the plastic packaging member of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art without making inventive efforts based on the embodiments of the present invention shall be included in the protection scope of the present invention.

[0020] As shown in Figures 1 to 8, an embodiment of the present invention provides a sound producing device 100, which includes a frame 1, a vibration system 2 fixed to the frame 1, and a magnetic circuit system 3 that drives the vibration system 2 to vibrate, and the magnetic circuit system 3 includes a magnet steel unit 32 fixed to the frame 1 and a yoke 31 connected to the magnet steel unit 32, and the frame 1, the yoke 31 and the vibration system 2 together form a sound producing inner cavity 6 surrounding the sound producing device 100, and the sound producing device 100 further includes a plastic packaging member 4 that is injection molded on the outer periphery of the yoke 31, and the plastic packaging member 4 has a plurality of leak holes 5 formed therethrough that connect the sound producing inner cavity 6 to the outside of the sound producing device 100.

[0021] Specifically, a frame 1 is used to support and fix a magnetic circuit system and a vibration system 2, and instead of the traditional ventilation isolation parts, a leak hole 5 is opened in a plastic packaging member 4, thereby eliminating the need for a ventilation isolation part and saving costs; and compared with the planar leakage of the ventilation isolation parts, the leakage through the plastic opening can leak in the XYZ space, making the leakage smoother.

[0022] In this embodiment, the magnet steel unit 32 includes a main magnet steel 321 and a sub magnet steel 322 that is arranged to surround the main magnet steel 321 and forms a magnetic gap 33 at a distance, and the vibration system 2 includes a diaphragm 21 fixed to the frame 1, a bobbin 23 fixed to the side of the diaphragm 21 close to the magnetic circuit system, a dome 24 fixed to the bobbin 23, and a voice coil 22 that drives the diaphragm 21 to vibrate, the voice coil 22 is fixed to the bobbin 23 and inserted into the magnetic gap 33, and the plastic package member 4 is arranged to surround the outer periphery of the sub magnet steel 322 and spaced apart from the sub magnet steel 322. The magnetic field formed by the main magnet steel 321 and the sub magnet steel 322 of the magnetic circuit system drives the voice coil 22 to vibrate and generate sound, and the vibration effect is improved by the diaphragm 21, resulting in better acoustic performance.

[0023] Here, the magnetic circuit system further includes a pole core 323, which is in intimate contact with the main magnet steel 321, and the pole core 323 is provided corresponding to the diaphragm 21, and the voice coil 22 is fitted around the pole core 323 and the main magnet steel 321. The pole core 323 reinforces the magnetic strength of the main magnet steel 321, and further improves the magnetic field strength of the magnetic circuit system, thereby making the sound production effect of the voice coil 22 better.

[0024] In this embodiment, the sound producing device 100 further includes four conductive elastic members 7 respectively provided at four corners of the sub magnet steel 322 with an interval therebetween, and the conductive elastic members 7 are fixed to the bobbin 23 and electrically connected to the voice coil 22. The conductive elastic member 7 has one end connected to the voice coil 22 and the other end used for connecting to an external circuit, so that the voice coil 22 can be energized to generate sound. Optionally, the conductive elastic member 7 may be a flexible circuit board which is easy to attach and has good conductive performance.

[0025] In this embodiment, the plastic package member 4 includes a bottom wall 41 fixed to the yoke 31, and a side wall 42 bent and extending from the bottom wall 41 in a direction closer to the vibration system 2, the side wall 42 is provided at a distance from the magnet steel unit 32, and the leak hole 5 is formed through the bottom wall 41 and / or the side wall 42. The side wall 42 is formed bent and extending from the bottom wall 41 in a direction closer to the vibration system 2 so as to realize connection and sealing by being injection molded and fixed to the periphery of the yoke 31. The side wall 42 is provided at a distance from the magnet steel unit 32 so as to surround the magnet steel unit 32, thereby providing a protective effect for the magnet steel unit 32. The leak holes 5 are formed through the bottom wall 41 and / or the side wall 42, and the positions of the leak holes 5 are varied to allow leakage in the XYZ spaces, making the leakage smoother and improving the acoustic performance of the sound generation device 100.

[0026] Preferably, the bottom wall 41 and the side wall 42 are arranged perpendicular to each other, and the right-angle structure formed by the bottom wall 41 and the side wall 42 can easily restrict the position of the sub-magnetic steel 322, and the fixing effect is better.

[0027] In this embodiment, the plurality of leak holes 5 are arranged in an array, so that the leak is uniform and the leak effect is better.

[0028] In one alternative embodiment, the sound producing device 100 has a rectangular shape, and the plastic packaging members 4 include four, which are respectively spaced apart from each other at the four corners of the yoke 31. The plastic packaging members 4 are fixed to the four corners of the yoke 31 and are circumferentially attached to the secondary magnet steel 322, thereby fixing the secondary magnet steel 322. Since the plastic packaging members 4 are provided with leak holes 5, the leak holes 5 allow leakage into the sound producing device 100, and the acoustic properties of the sound producing device 100 are improved.

[0029] Preferably, the leak hole 5 is formed through the side wall 42, and the leak hole 5 is a rectangular hole.

[0030] 5-6, in one optional embodiment, the sound producing device 100 has a rectangular shape, and includes two plastic packaging members 4, which are respectively provided at intervals on two opposing short axis sides or two opposing long axis sides of the yoke 31. By increasing the area of ​​the plastic packaging member 4, the number of leak holes 5 in the plastic packaging member 4 can be increased, and the leak effect can be improved.

[0031] In this embodiment, the plastic packaging member 4 is annular and is provided to surround the periphery of the yoke 31. This improves the fixing effect between the yoke 31 and the plastic packaging member 4. The bottom wall 41 of the plastic packaging member 4 is for supporting the sub-magnetic steel 322, and the side wall 42 is for fitting the sub-magnetic steel 322. The bottom wall 41 and the side wall 42 form a bent structure to fit the sub-magnetic steel 322 around the entire periphery, so that the fixing effect of the sub-magnetic steel 322 is better. Since the plastic packaging member 4 is provided with the leak hole 5, the area of ​​the plastic packaging member 4 is increased to increase the number of the leak holes 5, so that the sound-producing inner cavity 6 in the sound-producing device 100 leaks more smoothly.

[0032] In this embodiment, the leak hole 5 is a rectangular hole, and is formed so as to penetrate the side wall 42. The layout area of ​​the rectangular hole is large, and the leak becomes smooth.

[0033] In this embodiment, the leak holes 5 are circular holes, and are formed penetrating the bottom wall 41 and / or the side wall 42. There are many circular holes and they are evenly distributed, so that the leak effect is uniform.

[0034] Compared with the prior art, the sound device of the present invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system includes a magnet steel unit fixed to the frame and a yoke connected to the magnet steel unit, the frame, the yoke and the vibration system together form a sound-producing inner cavity surrounding the sound-producing device, and the sound-producing device further includes a plastic packaging member injection-molded on the outer periphery of the yoke, and the plastic packaging member has a plurality of leak holes penetrating therethrough that communicate the sound-producing inner cavity with the outside of the sound-producing device. By injection-molding the plastic packaging member for sealing and fixing to the yoke, and at the same time, opening leak holes in the plastic packaging member instead of the conventional ventilation isolation part, the ventilation isolation part can be omitted and costs can be saved, and compared with the plane leakage of the ventilation isolation part, the plastic opening can leak in the XYZ space, making the leakage smoother.

[0035] The above is merely an embodiment of the present invention, and it should be noted here that those skilled in the art may make modifications without departing from the creative idea of ​​the present invention, and all such modifications are within the scope of protection of the present invention. [Explanation of symbols]

[0036] 100 ... pronunciation device 1 … Frame 2 … Vibration system 21 … Vibration plate 22 … Voice coil 23 ... Bobbin 24 … Dome 3. Magnetic circuit system 31 … York 32 ... Magnetic steel unit 321 … Main magnet steel 322 … Sub-magnet steel 323 … magnetic pole core 33...Magnetic gap 4 … Plastic packaging materials 41 ... Bottom wall 42 … side wall 5 … Leak hole 6 … Pronounced inner cavity 7 ... Conductive elastic material

Claims

1. A sound generating device including a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system to vibrate, The magnetic circuit system includes a magnet steel unit fixed to the frame and a yoke connected to the magnet steel unit, the frame, the yoke and the vibration system are all formed to surround a sound-producing inner cavity, the sound-producing device further includes a plastic packaging member injection-molded on the outer periphery of the yoke, and the plastic packaging member is formed with a plurality of leak holes penetrating therethrough that connect the sound-producing inner cavity to the outside of the sound-producing device, the plastic package member includes a bottom wall fixed to the yoke and a side wall extending from the bottom wall in a bent manner toward the vibration system, the side wall being spaced apart from the magnet steel unit, and the leak hole being formed penetrating the bottom wall and / or the side wall; A sound generation device characterized by:

2. The plurality of leak holes are arranged in an array. The sound generating device according to claim 1 .

3. The sound-producing device has a rectangular shape, and the plastic package members include four plastic package members, each of which is spaced apart from the other at four corners of the yoke. The sound generating device according to claim 1 .

4. The sound-producing device has a rectangular shape, and the plastic package members include two plastic package members, each of which is spaced apart from the other on two opposing short axis sides or two opposing long axis sides of the yoke. The sound generating device according to claim 1 .

5. The plastic packaging member is annular and is provided so as to surround the periphery of the yoke. The sound generating device according to claim 1 .

6. The leak hole is a rectangular hole and is formed through the side wall. The sound generating device according to claim 1 .

7. The leak hole is a circular hole and is formed through the bottom wall and / or the side wall. The sound generating device according to claim 1 .

8. The magnet steel unit includes a main magnet steel and a sub-magnet steel that is arranged to surround the main magnet steel and is spaced apart to form a magnetic gap, the vibration system includes a diaphragm fixed to the frame, a bobbin fixed to a side of the diaphragm close to the magnetic circuit system, a dome fixed to the bobbin, and a voice coil that drives the diaphragm to vibrate, the voice coil is fixed to the bobbin and inserted into the magnetic gap, and the plastic package member is arranged to surround the outer periphery of the sub-magnet steel and is spaced apart from the sub-magnet steel. The sound generating device according to claim 1 .

9. The sound-producing device further includes four conductive elastic members spaced apart from each other at four corners of the sub-magnet steel, the conductive elastic members being fixed to a bobbin and electrically connected to the voice coil. The sound generating device according to claim 8 .

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