Sounding vibration device

Abstract

The utility model discloses a sounding vibration device, which comprises a vibrating diaphragm assembly, a magnetic circuit assembly and a vibrator assembly, and the magnetic circuit assembly is positioned between the vibrating diaphragm assembly and the vibrator assembly. The vibrating diaphragm assembly comprises a vibrating diaphragm and a voice coil connected to the side, close to the magnetic circuit assembly, of the vibrating diaphragm, the vibrator assembly comprises a mass part and a coil located on the mass part, and the voice coil and the coil are both located in a magnetic field generated by the magnetic circuit assembly; the mass part comprises a stainless steel plate and a tungsten-nickel alloy plate which are stacked; the vibrating diaphragm assembly vibrates in a first direction, and the vibrator assembly vibrates in a second direction perpendicular to the first direction. The structural strength of the position of the vibrator assembly is improved through the stainless steel plate and the tungsten-nickel alloy plate which are arranged in a stacked mode, the problem of breakage in the vibration work is avoided, and guarantee is provided for the small-size and thin design of the sound production vibration device. Meanwhile, the sound production vibration device is light in weight, and the vibration quantity is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic product accessories, and in particular relates to a sound-generating vibration device. Background Art

[0002] Currently, in the combination products of motors and speakers, in order to achieve the ultra-thin design of the product, the counterweight of the motor will be correspondingly thinned, which will cause the problem of breakage during use and lead to reduced product quality; if the breakage problem is to be avoided, the thickness of the counterweight will be increased, which will affect the thinning and small size design of the product. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides a sound-generating vibration device to solve the problem of counterweight breakage, while ensuring that the product has the advantages of small size and thinness.

[0004] The technical solution provided by the utility model is: a sound-generating vibration device, comprising a diaphragm assembly, a magnetic circuit assembly and a vibrator assembly, wherein the magnetic circuit assembly is located between the diaphragm assembly and the vibrator assembly; the diaphragm assembly comprises a diaphragm and a voice coil connected to a side of the diaphragm close to the magnetic circuit assembly, the vibrator assembly comprises a mass portion and a coil located on the mass portion, and both the voice coil and the coil are in the magnetic field generated by the magnetic circuit assembly; the mass portion comprises a stacked stainless steel plate and a tungsten-nickel alloy plate; the diaphragm assembly vibrates along a first direction, and the vibrator assembly vibrates along a second direction perpendicular to the first direction.

[0005] As an improvement, the tungsten-nickel alloy plate is fixed to a side of the stainless steel plate close to the magnetic circuit component.

[0006] As an improvement, the tungsten-nickel alloy plate includes a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate.

[0007] As a further improvement, the tungsten-nickel alloy plate has an escape portion, the escape portion penetrates along the first direction, and the coil is at least partially located in the escape portion.

[0008] As a further improvement, there are a plurality of tungsten-nickel alloy plates, and the plurality of tungsten-nickel alloy plates are spaced apart to form the avoidance portion; or, the avoidance portion is a through hole.

[0009] As a further improvement, the stainless steel plate covers the avoidance portion, and the coil is fixed to a side of the stainless steel plate close to the magnetic circuit assembly; or, the stainless steel plate has a groove corresponding to the avoidance portion, and the coil is fixed in the groove; or, the stainless steel plate has an opening that penetrates the stainless steel plate along the first direction at the avoidance portion corresponding to the avoidance portion, and the side of the opening that faces away from the magnetic circuit assembly is covered with a magnetic conductive plate, and the coil is located in the avoidance portion and the opening and fixed on the magnetic conductive plate.

[0010] As an improvement, the magnetic circuit assembly includes a plurality of magnets, the plurality of magnets are arranged along the second direction, the magnetizing directions of the plurality of magnets are parallel to the first direction, the magnetizing directions of two adjacent magnets are opposite, and the two driving sides of the coil correspond to two adjacent magnets respectively.

[0011] As an improvement, it also includes a shell, a spring and foam, the vibrator assembly is located in the shell, one end of the spring is connected to the side wall of the shell, the other end of the spring is connected to the stainless steel plate, and the foam is located between one end of the spring and the side wall of the shell and fixed to the shell.

[0012] As an improvement, along a third direction perpendicular to the first direction and the second direction, at least one end of the mass portion is provided with a limiting notch, and a limiting block is provided on the shell at a position corresponding to the limiting notch.

[0013] As a further improvement, the magnetic circuit assembly also includes a yoke, a side magnet, a center pole plate and a side pole plate, the side magnet is spaced apart from the plurality of magnets, the magnet and the side magnet are both fixed to a side of the yoke close to the diaphragm assembly, the center pole plate is fixed to a side of the magnet away from the vibrator assembly, the side pole plate is fixed to a side of the side magnet away from the vibrator assembly, the side pole plate and the center pole plate are spaced apart to form a magnetic gap, one end of the voice coil close to the vibrator assembly is inserted into the magnetic gap; the yoke has an opening at a position relative to the coil, and at least a portion of the magnet close to the coil is exposed to the opening.

[0014] By adopting the above-mentioned technical solution, the motor provided by the utility model has the following beneficial effects:

[0015] During use, since the voice coil and the coil are both in the magnetic field generated by the magnetic circuit assembly, the diaphragm assembly produces sound and the vibrator assembly produces vibration; the structural strength of the vibrator assembly is improved by stacking stainless steel plates and tungsten-nickel alloy plates, which not only avoids the problem of breakage during vibration work, but also provides a guarantee for the small size and thin design of the sound-generating vibration device; at the same time, the sound-generating vibration device itself is light in weight and the vibration amount is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 A top view of the vibrator assembly;

[0019] In the figure, 1-shell; 2-coil; 3-stainless steel plate; 301-limiting notch; 4-tungsten-nickel alloy plate; 401-avoidance part; 5-magnet; 6-spring; 601-foam; 602-first block; 603-second block; 604-reinforcement block; 7-limiting block; 8-yoke; 9-diaphragm; 901-voice coil; 902-injection molded part; 903-side magnet; 904-center pole plate; 905-side pole plate. DETAILED DESCRIPTION

[0020] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0021] like Figure 1 and Figure 2 As shown together, a sound-generating vibration device includes a housing 1, a diaphragm assembly is arranged in the housing 1, and the sound-generating vibration device also includes a magnetic circuit assembly and a vibrator assembly, wherein the magnetic circuit assembly is located between the diaphragm assembly and the vibrator assembly; the diaphragm assembly includes a diaphragm 9 and a voice coil 901 connected to the side of the diaphragm 9 close to the magnetic circuit assembly, and the vibrator assembly includes a mass portion and a coil 2 located on the mass portion, wherein the voice coil 901 and the coil 2 are both in the magnetic field generated by the magnetic circuit assembly; the mass portion includes a stacked stainless steel plate 3 and a tungsten-nickel alloy plate 4; the diaphragm assembly vibrates in a first direction, and the vibrator assembly vibrates in a second direction perpendicular to the first direction. The structural strength of the vibrator assembly is improved by stacking the stainless steel plate 3 and the tungsten-nickel alloy plate 4, which is conducive to small size and lightness.

[0022] In one embodiment, the tungsten-nickel alloy plate 4 is fixed to the side of the stainless steel plate 3 close to the magnetic circuit component, and the tungsten-nickel alloy plate 4 is a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate. Of course, in other embodiments, the tungsten-nickel alloy plate 4 can also be fixed to the side of the stainless steel plate 3 away from the magnetic circuit component.

[0023] In one embodiment, the tungsten-nickel alloy plate 4 has an escape portion 401, which penetrates along the first direction, and the coil 2 is at least partially located in the escape portion 401. There are many ways to set the tungsten-nickel alloy plate, for example, the tungsten-nickel alloy plate 4 can be set as a plurality of tungsten-nickel alloy plates 4, and the plurality of tungsten-nickel alloy plates 4 are spaced to form the escape portion 401; or the escape portion 401 is set as a through hole. This is conducive to reducing the overall thickness of the vibrator assembly and can effectively avoid the coil 2 from contacting the magnetic circuit assembly.

[0024] In one embodiment, the stainless steel plate 3 covers the avoidance portion 401, and the coil 2 is fixed to the side of the stainless steel plate 3 close to the magnetic circuit assembly; of course, the stainless steel plate can also be arranged in the following manner: either, the stainless steel plate 3 has a groove corresponding to the avoidance portion 401, and the coil 2 is fixed in the groove; or, the stainless steel plate 3 has an opening that penetrates the stainless steel plate 3 along the first direction at the avoidance portion 401 corresponding to the avoidance portion 401, and the side of the opening facing away from the magnetic circuit assembly is covered with a magnetic conductive plate (not shown in the figure), and the coil 2 is located in the avoidance portion 401 and the opening, and is fixed on the magnetic conductive plate.

[0025] In one embodiment, the magnetic circuit assembly includes a plurality of magnets 5, the plurality of magnets 5 are arranged along the second direction, the magnetization directions of the plurality of magnets 5 are parallel to the first direction, the magnetization directions of two adjacent magnets 5 are opposite, and the two driving edges of the coil 2 correspond to the two adjacent magnets 5 respectively. Optionally, the magnets 5 are provided in three pieces and are arranged at the center of the housing 1, the magnetic poles of the three magnets 5 close to the ends of the coil 2 are respectively N pole, S pole and N pole, and the other ends are S pole, N pole and S pole; or, the magnetic poles of the three magnets 5 close to the ends of the coil 2 are respectively S pole, N pole and S pole, and the other ends are N pole, S pole and N pole, the coil 2 deviates from the center of the housing 1, and the two driving edges of the coil 2 are respectively arranged corresponding to the two adjacent magnets 5. In this way, the two driving edges of the coil 2 are subjected to the same force direction in the magnetic field, thereby improving the driving force.

[0026] In one embodiment, a spring sheet 6 and a foam 601 are further provided in the housing 1, one end of the spring sheet 6 is connected to the inner side wall of the housing 1, the other end of the spring sheet 6 is connected to the stainless steel plate 3, and the foam 601 is located between one end of the spring sheet 6 and the side wall of the housing 1 and is fixed to the inner wall of the housing 1. Optionally, a first stopper 602 is welded to the spring sheet 6 at the end connected to the housing 1; a second stopper 603 and an L-shaped reinforcing block 604 are welded to both sides of the other end of the spring sheet 6, respectively, the reinforcing block 604 is welded to the stainless steel plate 3, and the second stopper 603 is bonded to the foam 601, so that the welding strength between the spring sheet 6 and the stainless steel plate 3 and the housing 1 is increased through the first stopper 602, the second stopper 603 and the reinforcing block 604, and deformation of the spring sheet 6 during operation is avoided.

[0027] In one embodiment, along a third direction perpendicular to the first direction and the second direction, a limiting notch 301 is provided at at least one end of the mass portion, and a limiting block 7 is provided on the shell 1 at a position corresponding to the limiting notch 301, so that the vibration displacement of the mass portion in the shell 1 (specifically the second direction) is limited by the limiting block 7.

[0028] In one embodiment, the magnetic circuit assembly further includes a yoke 8, an injection molded part 902 for mounting a diaphragm 9, a side magnet 903, a center pole plate 904, and a side pole plate 905. The side magnet 903 surrounds the periphery of the plurality of magnets 5 and is spaced apart from the magnets 5. The magnetization direction of the side magnet 903 is opposite to that of the magnet 5 close to the side magnet 903 (i.e., the end of the magnet 5 close to the side magnet 903 facing the coil 2 is an N pole and the other end is an S pole, and the end of the side magnet 903 facing the coil 2 is an S pole and the other end is an N pole). 3 are all fixed to the side of the yoke 8 close to the diaphragm assembly, the center pole plate 904 is fixed to the side of the magnet 5 away from the vibrator assembly, the side pole plate 905 is fixed to the side of the side magnet 903 away from the vibrator assembly and is also connected to the injection molded part 902, the side pole plate 905 and the center pole plate 904 are spaced to form a magnetic gap, and one end of the voice coil 901 close to the vibrator assembly is inserted into the magnetic gap; the yoke 8 has an opening at a position relative to the coil 2, and at least part of the side of the magnet 5 close to the coil 2 is exposed in the opening, ensuring that enough magnetic lines of force pass through the coil 2 and can generate enough driving force.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A sound-generating vibration device, characterized in that: It includes a diaphragm assembly, a magnetic circuit assembly and a vibrator assembly, wherein the magnetic circuit assembly is located between the diaphragm assembly and the vibrator assembly; the diaphragm assembly includes a diaphragm and a voice coil connected to a side of the diaphragm close to the magnetic circuit assembly, the vibrator assembly includes a mass part and a coil located on the mass part, and both the voice coil and the coil are in the magnetic field generated by the magnetic circuit assembly; the mass part includes a stacked stainless steel plate and a tungsten-nickel alloy plate; the diaphragm assembly vibrates along a first direction, and the vibrator assembly vibrates along a second direction perpendicular to the first direction.

2. The sound-generating vibration device according to claim 1, characterized in that: The tungsten-nickel alloy plate is fixed to a side of the stainless steel plate close to the magnetic circuit component.

3. The sound-generating vibration device according to claim 1, characterized in that: The tungsten-nickel alloy plate includes a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate.

4. The sound-generating vibration device according to claim 2, characterized in that: The tungsten-nickel alloy plate has an escape portion, the escape portion penetrates along the first direction, and the coil is at least partially located in the escape portion.

5. The sound-generating vibration device according to claim 4, characterized in that: There are a plurality of tungsten-nickel alloy plates, and the plurality of tungsten-nickel alloy plates are spaced apart to form the avoidance portion; or, the avoidance portion is a through hole.

6. The sound-generating vibration device according to claim 4, characterized in that: The stainless steel plate covers the avoidance portion, and the coil is fixed to a side of the stainless steel plate close to the magnetic circuit assembly; or, the stainless steel plate has a groove corresponding to the avoidance portion, and the coil is fixed in the groove; or, the stainless steel plate has an opening that penetrates the stainless steel plate along the first direction at the avoidance portion corresponding to the avoidance portion, and the side of the opening that faces away from the magnetic circuit assembly is covered with a magnetic conductive plate, and the coil is located in the avoidance portion and the opening, and is fixed on the magnetic conductive plate.

7. The sound-generating vibration device according to claim 1, characterized in that: The magnetic circuit assembly includes a plurality of magnets, the plurality of magnets are arranged along the second direction, the magnetizing directions of the plurality of magnets are parallel to the first direction, the magnetizing directions of two adjacent magnets are opposite, and the two driving sides of the coil correspond to two adjacent magnets respectively.

8. The sound-generating vibration device according to claim 1, characterized in that: It also includes a shell, a spring and foam, the vibrator assembly is located in the shell, one end of the spring is connected to the side wall of the shell, the other end of the spring is connected to the stainless steel plate, and the foam is located between one end of the spring and the side wall of the shell and fixed to the shell.

9. The sound-generating vibration device according to claim 8, characterized in that: Along a third direction perpendicular to the first direction and the second direction, at least one end of the mass portion is provided with a limiting notch, and a limiting block is provided on the shell at a position corresponding to the limiting notch.

10. The sound-generating vibration device according to claim 7, characterized in that: The magnetic circuit assembly also includes a yoke, a side magnet, a center pole plate and a side pole plate. The side magnet is spaced apart from the plurality of magnets. The magnet and the side magnet are both fixed to a side of the yoke close to the diaphragm assembly. The center pole plate is fixed to a side of the magnet away from the vibrator assembly. The side pole plate is fixed to a side of the side magnet away from the vibrator assembly. A magnetic gap is formed between the side pole plate and the center pole plate. One end of the voice coil close to the vibrator assembly is inserted into the magnetic gap. The yoke has an opening at a position relative to the coil, and at least a portion of the magnet close to the coil is exposed to the opening.

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