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 two voice coils connected to the side, close to the magnetic circuit assembly, of the vibrating diaphragm, the vibrating diaphragm assembly vibrates in the first direction, and the two voice coils are arranged in the second direction perpendicular to the first direction; the vibrator assembly comprises a mass part and a coil located on the mass part, the coil is arranged in the center area of the mass part, and the vibrator assembly vibrates in the second direction; the coil and the two voice coils are located in a magnetic field generated by the magnetic circuit assembly. The coil is arranged in the central area of the mass part, so that the problems that the mass center of the vibrator assembly deviates, and the shell is impacted due to vibration deflection caused by the mass center deviation can be effectively solved; meanwhile, the coil is arranged in the middle, so that the coverage area can be enlarged, the corresponding magnetic field is increased, the magnetic induction line utilization rate is high, and the vibration driving force and vibration quantity of the vibrator assembly are improved.

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] At present, the vibration part of vibration and sound-generating products (such as the combination of a motor and a speaker) adopts a single-coil mode, and the sound-generating part adopts a single voice coil mode. The coil of the vibration part is set off-center, and its center of mass is offset. During vibration operation, the vibration component has the problem of pendulum, which causes the vibration component to hit the shell and cause damage to the shell. At the same time, due to the low utilization rate of the magnetic lines of force, the driving force of the vibration part is small, which affects the user's tactile experience. 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 problems of deflection and impact on the shell during vibration operation, while improving the vibration driving force.

[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 two voice coils connected to a side of the diaphragm close to the magnetic circuit assembly, the diaphragm assembly vibrates along a first direction, and the two voice coils are arranged along a second direction perpendicular to the first direction; the vibrator assembly comprises a mass portion and a coil located on the mass portion, the coil is arranged in the central area of ​​the mass portion, and the vibrator assembly vibrates along the second direction; the coil and the two voice coils are both in the magnetic field generated by the magnetic circuit assembly.

[0005] As an improvement, the magnetic circuit assembly includes a central magnet, the central magnet includes a first magnetic part and a second magnetic part, the magnetization direction of the first magnetic part is opposite to the magnetization direction of the second magnetic part and is parallel to the first direction, the two driving edges of the coil correspond to the first magnetic part and the second magnetic part respectively, a first gap is provided at the opposite position of the first magnetic part and the second magnetic part, and two adjacent voice coil segments of the two voice coils are at least partially inserted into the first gap during the vibration of the voice coils.

[0006] As a further improvement, the first magnetic part and the second magnetic part are separate structures or integrated structures.

[0007] As a further improvement, the first magnetic part and the second magnetic part have a groove at a position opposite to each other, and the groove forms the first gap; or the first magnetic part and the second magnetic part are spaced apart from each other and form the first gap.

[0008] As an improvement, the mass portion includes a stainless steel plate and a tungsten-nickel alloy plate which are stacked, and the tungsten-nickel alloy plate is fixed to a side of the stainless steel plate close to the magnetic circuit assembly.

[0009] As a further improvement, the tungsten-nickel alloy plate includes a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate.

[0010] As a further improvement, the magnetic circuit assembly also includes side magnets, which are arranged on the periphery of the center magnet. The side magnets are spaced apart from the center magnet to form a second gap, and two non-adjacent voice coil segments of the voice coils are at least partially inserted into the second gap during the vibration of the voice coils.

[0011] As a further improvement, the side magnets include two first side magnets, two second side magnets and two third side magnets, along the second direction, the two third side magnets are located on both sides of the central magnet; along the third direction perpendicular to the first direction and the second direction, the two first side magnets are located on both sides of the first magnetic part, and the two second side magnets are located on both sides of the second magnetic part; the magnetization direction of the side magnets is parallel to the first direction, the magnetization direction of the third side magnet close to the first magnetic part is the same as the magnetization direction of the two first side magnets and opposite to the magnetization direction of the first magnetic part, and the magnetization direction of the third side magnet close to the second magnetic part is the same as the magnetization direction of the two second side magnets and opposite to the magnetization direction of the second magnetic part.

[0012] As a further improvement, the first side magnet and the second side magnet located on the same side of the central magnet are an integral structure or a separate structure; or, the side magnet is an integral ring structure.

[0013] As a further improvement, the magnetic circuit assembly also includes a yoke, a central magnetic conductive plate and a side magnetic conductive plate, the yoke is located between the vibrator assembly and the central magnet, the central magnet and the side magnet are located on the same side of the yoke, the central magnetic conductive plate is fixed to the side of the central magnet facing away from the yoke, the central magnetic conductive plate forms a first magnetic gap, and the first magnetic gap is arranged corresponding to the first gap, the side magnetic conductive plate is fixed to the side of the side magnet facing away from the yoke, the central magnetic conductive plate and the side magnetic conductive plate are spaced apart from each other to form the second magnetic gap, and the second magnetic gap is arranged corresponding to the second gap.

[0014] By adopting the above-mentioned technical solution, the beneficial effects of the sound-generating vibration device provided by the utility model are as follows:

[0015] During use, the coil, two voice coils and magnetic circuit assembly cooperate with each other to realize the sharing of the magnetic circuit of the vibrator assembly and the diaphragm assembly, and their respective operations do not affect each other; by arranging the coil in the central area of ​​the mass part, the problem of the center of mass offset of the vibrator assembly and the problem of vibration swinging and hitting the shell caused by the center of mass offset can be effectively solved; at the same time, the central placement of the coil can increase the area it covers, the corresponding magnetic field increases, and the utilization rate of the magnetic flux lines is high, which greatly enhances the vibration driving force of the vibrator assembly, the vibration amount is large, and the user's tactile experience is improved. 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 an implementation mode of the utility model;

[0018] Figure 2 It is a structural schematic diagram of another embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the structure of the magnetic circuit assembly;

[0020] Figure 4 yes Figure 1 A top view after removing the magnetic circuit assembly and the vibrator assembly;

[0021] In the figure, 1-shell; 2-diaphragm; 201-voice coil; 202-yoke; 203-center magnetic plate; 204-side magnetic plate; 3-coil; 4-first magnetic part; 401-second magnetic part; 403-first side magnet; 404-second side magnet; 405-third side magnet; 406-first gap; 407-second gap; 5-stainless steel plate; 6-tungsten-nickel alloy plate; 7-spring; 701-foam; 702-first stopper; 703-second stopper; 704-reinforcement block; 8-limiting notch; 9-limiting block. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figures 1 to 3As shown together, a sound-generating vibration device includes a diaphragm assembly, a magnetic circuit assembly and a vibrator assembly, the vibrator assembly is arranged in a shell 1, and the magnetic circuit assembly is located between the diaphragm assembly and the vibrator assembly; the diaphragm assembly includes a diaphragm 2 and two voice coils 201 connected to a side of the diaphragm 2 close to the magnetic circuit assembly, the diaphragm assembly vibrates along a first direction, and the two voice coils 201 are arranged along a second direction perpendicular to the first direction; the vibrator assembly includes a mass part and a coil 3 located on the mass part, the coil 3 is arranged in the central area of ​​the mass part, the vibrator assembly vibrates along the second direction, and a spring assembly is provided between the mass part and the inner wall of the shell 1; the coil 3 and the two voice coils 201 are both in the magnetic field generated by the magnetic circuit assembly, the coil 3 is located in the central area of ​​the mass part, and the center of mass of the vibrator assembly is centered to reduce the occurrence of deflection of the vibrator assembly during vibration.

[0024] In one embodiment, Figure 1-3 As shown, the magnetic circuit assembly includes a central magnet, which includes a first magnetic part 4 and a second magnetic part 401. The magnetization direction of the first magnetic part 4 is opposite to that of the second magnetic part 401 and is parallel to the first direction. The two driving edges of the coil 3 correspond to the first magnetic part 4 and the second magnetic part 401 respectively. The first magnetic part 4 and the second magnetic part 401 are provided with a first gap 406 at the opposite positions. The two adjacent voice coil segments of the two voice coils 201 are at least partially inserted into the first gap 406 during the vibration of the voice coils 201. The magnetic fields generated by the first magnetic part 4 and the second magnetic part 401 act on the coil 3 together to enhance the vibration sense; the current directions of the two voice coils 201 are opposite, and the two voice coils 201 are subjected to the same force direction in the magnetic field generated by the first magnetic part 4 and the second magnetic part 401 after being energized.

[0025] In the present invention, the first magnetic part 4 and the second magnetic part 401 can be set as a split structure (see Figure 1 ), or it can be set as an integrated structure (see Figure 2 ); the first magnetic part 4 has a groove at a position opposite to the second magnetic part 401, and the groove forms a first gap 406. The first magnetic part 4 and the second magnetic part 401 can be an integral structure or a split structure; or the first magnetic part 4 and the second magnetic part 401 are spaced apart and form the first gap 406. The present invention does not limit this, and those skilled in the art can make a choice according to product requirements.

[0026] In one embodiment, the mass part includes a stacked stainless steel plate 5 and a tungsten-nickel alloy plate 6, the tungsten-nickel alloy plate 6 being fixed to a side of the stainless steel plate 5 close to the magnetic circuit assembly; the tungsten-nickel alloy plate includes a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate. Thus, the structural strength of the mass part is improved by stacking the stainless steel plate 5 and the tungsten-nickel alloy plate 6, which not only avoids the problem of fracture during vibration operation, but also provides a guarantee for the small size and light and thin design of the sound-generating vibration device.

[0027] In one embodiment, the magnetic circuit assembly further includes a side magnet, which is disposed on the periphery of the central magnet, and is spaced apart from the central magnet to form a second gap 407. The non-adjacent voice coil segments of the two voice coils 201 are at least partially inserted into the second gap 407 during the vibration of the voice coil 201. The magnetic field strength is further enhanced by the side magnet, thereby improving the sound performance.

[0028] In one embodiment, Figure 3 As shown, the side magnet includes two first side magnets 403, two second side magnets 404 and two third side magnets 405. Along the second direction, the two third side magnets 405 are located on both sides of the central magnet; along the third direction perpendicular to the first direction and the second direction, the two first side magnets 403 are located on both sides of the first magnetic part 4, and the two second side magnets 404 are located on both sides of the second magnetic part 401; the magnetizing direction of the side magnet is parallel to the first direction, the magnetizing direction of the third side magnet 405 close to the first magnetic part 4 is the same as the magnetizing direction of the two first side magnets 403, and is opposite to the magnetizing direction of the first magnetic part 4, and the magnetizing direction of the third side magnet 405 close to the second magnetic part 401 is the same as the magnetizing direction of the two second side magnets 404, and is opposite to the magnetizing direction of the second magnetic part 401.

[0029] The first side magnet 403 and the second side magnet 404 located on the same side of the central magnet are an integral structure or a split structure; or, the side magnets are an integral ring structure.

[0030] In one embodiment, the magnetic circuit assembly also includes a yoke 202, a central magnetic conductive plate 203, and a side magnetic conductive plate 204. The yoke 202 is located between the vibrator assembly and the central magnet. The central magnet and the side magnet are located on the same side of the yoke 202. The central magnetic conductive plate 203 is fixed on the side of the central magnet facing away from the yoke 202. The central magnetic conductive plate 203 forms a first magnetic gap, and the first magnetic gap is corresponding to the first gap 406. The side magnetic conductive plate 204 is fixed on the side of the side magnet facing away from the yoke 202. The central magnetic conductive plate 203 and the side magnetic conductive plate 204 are spaced apart from each other to form a second magnetic gap, and the second magnetic gap is corresponding to the second gap 407.

[0031] like Figure 4As shown, in one embodiment, the spring assembly includes a spring 7, one end of which is welded to the side wall of the housing 1, the other end of which is welded to the stainless steel plate 5, and a foam 701 is bonded between the spring 7 and the end wall of the housing 1. Optionally, a first stopper 702 is welded to the spring 7 at the end connected to the housing 1; a second stopper 703 and a reinforcing block 704 adapted to the corners of the stainless steel plate 5 are welded to both sides of the other end of the spring 7, respectively, the reinforcing block 704 is welded to the stainless steel plate 5, and the second stopper 703 is bonded to the foam 701. Thus, the welding strength between the spring 7 and the mass part and the housing 1 is increased by the first stopper 702, the second stopper 703 and the reinforcing block 704, so as to prevent the spring 7 from being deformed during operation.

[0032] In one embodiment, a limiting notch 8 is further provided on the mass part, and a limiting block 9 is provided on the shell 1 at a position corresponding to the limiting notch 8, and the limiting block 9 is used to limit the vibration displacement of the mass part in the second direction and / or third direction in the shell 1.

[0033] 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 two voice coils connected to a side of the diaphragm close to the magnetic circuit assembly, the diaphragm assembly vibrates along a first direction, and the two voice coils are arranged along a second direction perpendicular to the first direction; the vibrator assembly includes a mass part and a coil located on the mass part, the coil is arranged in the central area of ​​the mass part, and the vibrator assembly vibrates along the second direction; the coil and the two voice coils are both in the magnetic field generated by the magnetic circuit assembly.

2. The sound-generating vibration device according to claim 1, characterized in that: The magnetic circuit assembly includes a central magnet, which includes a first magnetic part and a second magnetic part. The magnetization direction of the first magnetic part is opposite to that of the second magnetic part and is parallel to the first direction. The two driving edges of the coil correspond to the first magnetic part and the second magnetic part respectively. A first gap is provided at the opposite positions of the first magnetic part and the second magnetic part. Two adjacent voice coil segments of the two voice coils are at least partially inserted into the first gap during the vibration of the voice coils.

3. The sound-generating vibration device according to claim 2, characterized in that: The first magnetic part and the second magnetic part are a separate structure or an integrated structure.

4. The sound-generating vibration device according to claim 2, characterized in that: The first magnetic part and the second magnetic part have a groove at a position opposite to each other, and the groove forms the first gap; or the first magnetic part and the second magnetic part are spaced apart from each other and form the first gap.

5. The sound-generating vibration device according to claim 1, characterized in that: The mass part comprises a stainless steel plate and a tungsten-nickel alloy plate which are stacked, and the tungsten-nickel alloy plate is fixed to a side of the stainless steel plate close to the magnetic circuit component.

6. The sound-generating vibration device according to claim 5, characterized in that: The tungsten-nickel alloy plate includes a tungsten-nickel-cobalt alloy plate or a tungsten-nickel-copper alloy plate.

7. The sound-generating vibration device according to claim 2, characterized in that: The magnetic circuit assembly also includes side magnets, which are arranged on the periphery of the center magnet. The side magnets are spaced apart from the center magnet to form a second gap, and two non-adjacent voice coil segments of the voice coils are at least partially inserted into the second gap during the vibration of the voice coils.

8. The sound-generating vibration device according to claim 7, characterized in that: The side magnets include two first side magnets, two second side magnets and two third side magnets. Along the second direction, the two third side magnets are located on both sides of the central magnet; along the third direction perpendicular to the first direction and the second direction, the two first side magnets are located on both sides of the first magnetic part, and the two second side magnets are located on both sides of the second magnetic part; the magnetization direction of the side magnets is parallel to the first direction, the magnetization direction of the third side magnet close to the first magnetic part is the same as the magnetization direction of the two first side magnets, and opposite to the magnetization direction of the first magnetic part, and the magnetization direction of the third side magnet close to the second magnetic part is the same as the magnetization direction of the two second side magnets, and opposite to the magnetization direction of the second magnetic part.

9. The sound-generating vibration device according to claim 8, characterized in that: The first side magnet and the second side magnet located on the same side of the central magnet are an integral structure or a separate structure; or, the side magnet is an integral ring structure.

10. The sound-generating vibration device according to claim 8, characterized in that: The magnetic circuit assembly also includes a yoke, a central magnetic conductive plate and a side magnetic conductive plate. The yoke is located between the vibrator assembly and the central magnet. The central magnet and the side magnet are located on the same side of the yoke. The central magnetic conductive plate is fixed to the side of the central magnet facing away from the yoke. The central magnetic conductive plate forms a first magnetic gap, and the first magnetic gap is arranged corresponding to the first gap. The side magnetic conductive plate is fixed to the side of the side magnet facing away from the yoke. The central magnetic conductive plate and the side magnetic conductive plate are arranged at intervals to form a second magnetic gap, and the second magnetic gap is arranged corresponding to the second gap.

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