Vibration device

Abstract

The utility model relates to a vibrating device, belonging to the vibrating device technical field, including magnetic steel, diaphragm subassembly, FPC, loudspeaker drive voice coil, motor drive voice coil, mass block, the magnetic steel includes left and right two rows, each row includes upper and lower two layers, each layer includes two, loudspeaker drive voice coil is vertically arranged between the two magnetic steel of each layer, and the mass block is arranged between the two magnetic steel of each layer. The mass block is arranged between the two layers of magnetic steel and is bonded with the magnetic steel, the motor driving voice coil is arranged at the central positions of the front side and the rear side of the magnetic steel, the motor driving voice coil comprises an upper voice coil and a lower voice coil, and the upper voice coil and the lower voice coil are respectively in one-to-one correspondence with the two layers of magnetic steel. The problem of mutual influence of magnetic fields does not exist, the sound production and vibration functions of the product are realized, and the uniform bidirectional magnetic field of a magnetic circuit is fully utilized, so that the overall volume is reduced, and excellent acoustic and vibration performance is achieved.

Description

Technical Field

[0001] The utility model relates to a vibration device and belongs to the technical field of vibration devices. Background Art

[0002] With the market demand, smart mobile devices are constantly updated and upgraded. Bluetooth headsets, smart glasses, mobile phones and other sound-generating electronic products are often accompanied by requirements for vibration functions. In addition, the size of the products is required to be continuously reduced and become thinner, while the functions of the products cannot be reduced. This constantly puts forward requirements for smaller sizes for speakers and motor products.

[0003] At present, multifunctional devices with vibration functions and sound playback are widely used in current smart mobile devices. However, since the motor assembly is stacked under the sound-generating unit, the thickness of the multifunctional device increases, and it becomes more difficult to achieve thinness and lightness of the device. In addition, the sound-generating unit and the motor have their own magnetic circuits, and the magnetic field distributions of both parties interfere and affect each other, resulting in a large number of magnets in the multifunctional device, resulting in a large volume and inability to be miniaturized, and also resulting in poor acoustic and vibration performance of the multifunctional device. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technology and to provide a vibration device with a compact structure. The drive of the speaker and the motor jointly utilizes the same magnetic field, and there is no problem of mutual influence of the magnetic fields. At the same time, the sound and vibration functions of the product are realized, and the uniform bidirectional magnetic field of the magnetic circuit is fully utilized, thereby reducing the overall volume and achieving superior acoustic and vibration performance.

[0005] The purpose of the utility model is achieved through the following technical measures: a vibration device, including a magnetic steel, a diaphragm assembly, an FPC, a speaker driving voice coil, a motor driving voice coil, and a mass block, the magnetic steel includes two left and right columns, each column includes two upper and lower layers, each layer includes two, the speaker driving voice coil is vertically arranged between the two magnetic steels of each layer, the mass block is arranged between the two layers of magnetic steel and bonded to the magnetic steel, the motor driving voice coil is arranged at the center position of the front and rear sides of the magnetic steel, the motor driving voice coil includes an upper and lower voice coil, which correspond to the two layers of magnetic steel one by one.

[0006] As a further improvement of the above technical solution:

[0007] The speaker driving voice coil comprises two voice coils, namely a first voice coil and a second voice coil, the first voice coil and the second voice coil are arranged side by side, and the first voice coil and the second voice coil correspond to two columns of magnetic steel respectively.

[0008] The mass blocks are arranged on both sides of the speaker driving voice coil, and the two sides of the mass block are respectively connected with spring pieces.

[0009] The mass block is made of non-magnetic material.

[0010] The motor-driven voice coil is fixedly connected to a bracket, and the magnetic steel, the speaker-driven voice coil, the motor-driven voice coil, the mass block, and the spring are all arranged in the bracket.

[0011] The spring sheet is fixedly connected to the bracket.

[0012] The diaphragm assembly is bonded to the upper end of the bracket, and the FPC is bonded to the lower end of the bracket.

[0013] The lower end of the speaker driving voice coil is bonded to the FPC.

[0014] The upper end of the speaker driving voice coil is bonded to the diaphragm assembly.

[0015] An upper shell is arranged at the upper end of the bracket, a lower shell is arranged at the lower end of the bracket, and a sound outlet is arranged on the upper shell.

[0016] Due to the adoption of the above technical scheme, compared with the prior art, the advantages of the utility model are: the utility model has a compact structure, the speaker and the motor drive jointly utilize the same magnetic field, there is no problem of mutual influence of magnetic fields, and the sound and vibration functions of the product are realized at the same time, and the uniform bidirectional magnetic field of the magnetic circuit is fully utilized, thereby reducing the overall volume and achieving superior acoustic and vibration performance.

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a vibration device in an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the explosion structure of a vibration device in an embodiment of the utility model;

[0020] Figure 3 This is a schematic cross-sectional view of a vibration device in an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the speaker driving voice coil in the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the speaker driving voice coil and the magnetic steel in the embodiment of the utility model;

[0023] Figure 6 The magnetic field distribution diagram of the first voice coil and the second voice coil of the speaker driving voice coil in the embodiment of the utility model;

[0024] Figure 7It is a schematic diagram of the three-dimensional structure of the motor-driven voice coil, the magnetic steel, the mass block, and the spring in the embodiment of the utility model;

[0025] Figure 8 This is a diagram showing the magnetic field distribution of the motor-driven voice coil in an embodiment of the present utility model.

[0026] In the figure, 1-magnetic steel, 2-diaphragm assembly, 3-FPC, 4-speaker driving voice coil, 5-motor driving voice coil, 6-mass block, 7-first voice coil, 8-second voice coil, 9-spring, 10-bracket, 11-upper shell, 12-lower shell. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0030] like Figure 1-8As shown, a vibration device includes a magnetic steel 1, a diaphragm assembly 2, an FPC 3, a speaker driving voice coil 4, a motor driving voice coil 5, and a mass block 6. The magnetic steel 1 includes two left and right columns, each column includes two upper and lower layers, and each layer includes two. The speaker driving voice coil 4 is vertically arranged between the two magnetic steels 1 in each layer. The loudspeaker driven voice coil 4 includes two voice coils, namely a first voice coil 7 and a second voice coil 8. The first voice coil 7 and the second voice coil 8 are arranged side by side. The first voice coil 7 and the second voice coil 8 correspond to two columns of magnetic steels one by one respectively. The first voice coil 7 and the second voice coil 8 are connected to current signals of the same frequency and magnitude but opposite phases; the mass block 6 is arranged between the two layers of magnetic steels and bonded to the magnetic steels. The mass block 6 is arranged on both sides of the loudspeaker driven voice coil 4. The mass block 6 is a non-magnetic conductive material. Shrapnel 9 is connected to both sides of the mass block 6. A motor driven voice coil 5 is arranged at the center position of the front and rear sides of the magnetic steel 1. The motor driven voice coil 5 does not contact the magnetic steel 1. The motor driven voice coil 5 includes an upper and a lower voice coil, which correspond to the two layers of magnetic steels one by one respectively. The magnetic steel 1 provides a magnetic field for the loudspeaker driven voice coil 4 and the motor driven voice coil 5.

[0031] The motor-driven voice coil 5 is fixedly connected to the bracket 10, the magnetic steel 1, the speaker-driven voice coil 4, the motor-driven voice coil 5, the mass block 6, and the shrapnel 9 are all arranged in the bracket 10, the shrapnel 9 is fixedly connected to the bracket 10, the diaphragm assembly 2 is bonded to the upper end of the bracket 10, the FPC3 is bonded to the lower end of the bracket 10, the lower end of the speaker-driven voice coil 4 is bonded to the FPC3, the connecting pins of the speaker-driven voice coil 4 are welded to the FPC3, and the upper end of the speaker-driven voice coil 4 is bonded to the diaphragm assembly 2; the upper end of the bracket 10 is provided with an upper shell 11, the lower end of the bracket 10 is provided with a lower shell 12, the upper shell 11 is provided with a sound outlet, and the sound is emitted from the sound outlet.

[0032] like Figure 6 As shown, the force movement of the loudspeaker driven voice coil 4 is as follows: the first voice coil 7 and the second voice coil 8 are in the magnetic field provided by the combination of four magnets 1 respectively, the current phases of the two voice coils are opposite, and the directions of the magnetic fields are opposite. When the current passes through, the driving directions of the loudspeaker driven voice coils 4 are the same and upward at the same time. When the current changes direction, the driving directions are downward at the same time, thereby pushing the diaphragm assembly 2 to vibrate and make sound.

[0033] like Figure 7As shown, two mass blocks 6 are bonded with four magnets each, as a motor vibration unit, the two sides of the mass block 6 are respectively welded to the spring sheet 9, and the spring sheet 9 is bonded to the bracket 10 and fixed to the bracket 10. There is a motor driving voice coil 5 on each side of the motor vibration unit. The spring sheet 9 of this structure is elastically connected to the motor vibration unit in the x direction, that is, the magnet 1 and the mass block 6 can move relative to the bracket 10 in the x direction. In the y direction, the spring sheet 9 is rigidly connected to the motor vibration unit, that is, the magnet 1 and the mass block 6 cannot be displaced in the y direction relative to the bracket 10, and the y direction is exactly the vibration direction of the speaker. In this direction, the magnet 1 has no displacement relative to the bracket 10, so it is ensured that during the operation of the speaker, the influence of the magnet 1 vibrating in the x direction on the sound of the speaker can be ignored.

[0034] like Figure 8 As shown, taking the motor-driven voice coil 5 on one side as an example, the motor-driven voice coil 5 includes an upper and lower voice coil, which is located in the center of the four magnets. When the two voice coils pass opposite currents, two magnetic fields with opposite magnetism are generated. The figure shows the direction of the magnetic field generated by the voice coil at a certain moment. The direction of the magnetic field generated by the four magnets has been determined. The magnetic field of the voice coil interacts with the magnetic field of the magnet 1, and the four magnets are simultaneously subjected to a leftward force. In the same situation, the voice coil on the other side of the motor vibration unit is fed with a current in the opposite direction, and the mass block 6 is also driven to move to the left.

[0035] When the motor drives the voice coil 5 to pass an AC signal, the magnet 1 will be driven by the x-direction force, and the magnet 1 and the mass block 6 are a whole, regarded as the vibrator of the motor, and connected to the spring 9 at the same time, the vibration unit is limited to vibrate in the x-direction, and then the vibration can be felt. The diaphragm vibrates up and down with time, and the vibrator vibrates left and right with time. The vibration directions of the two do not affect each other, and they share the magnetic circuit, saving space and realizing the sound and vibration of the product.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration device, characterized in that: The invention comprises a magnetic steel (1), a diaphragm assembly (2), an FPC (3), a speaker driving voice coil (4), a motor driving voice coil (5), and a mass block (6), wherein the magnetic steel (1) comprises two left and right columns, each column comprises two upper and lower layers, each layer comprises two, the speaker driving voice coil (4) is vertically arranged between two magnetic steels (1) in each layer, the mass block (6) is arranged between the two layers of magnetic steel and bonded to the magnetic steel, the motor driving voice coil (5) is arranged at the center position of the front and rear sides of the magnetic steel (1), and the motor driving voice coil (5) comprises two upper and lower voice coils, which correspond to the two layers of magnetic steel respectively.

2. A vibration device according to claim 1, characterized in that: The loudspeaker driving voice coil (4) comprises two voice coils, namely a first voice coil (7) and a second voice coil (8). The first voice coil (7) and the second voice coil (8) are arranged side by side, and the first voice coil (7) and the second voice coil (8) correspond to the two columns of magnetic steel respectively.

3. A vibration device according to claim 1, characterized in that: The mass block (6) is arranged on both sides of the loudspeaker driving voice coil (4), and spring sheets (9) are respectively connected to both sides of the mass block (6).

4. A vibration device according to claim 1 or 3, characterized in that: The mass block (6) is made of non-magnetic material.

5. A vibration device according to claim 3, characterized in that: The motor-driven voice coil (5) is fixedly connected to a bracket (10), and the magnetic steel (1), the speaker-driven voice coil (4), the motor-driven voice coil (5), the mass block (6), and the spring sheet (9) are all arranged in the bracket (10).

6. A vibration device according to claim 5, characterized in that: The spring sheet (9) is fixedly connected to the bracket (10).

7. A vibration device according to claim 5 or 6, characterized in that: The diaphragm assembly (2) is bonded to the upper end of the bracket (10), and the FPC (3) is bonded to the lower end of the bracket (10).

8. A vibration device according to claim 7, characterized in that: The lower end of the speaker driving voice coil (4) is bonded to the FPC (3).

9. A vibration device according to claim 8, characterized in that: The upper end of the loudspeaker driving voice coil (4) is bonded to the diaphragm assembly (2).

10. A vibration device according to claim 5, characterized in that: An upper shell (11) is provided at the upper end of the bracket (10), a lower shell (12) is provided at the lower end of the bracket (10), and a sound outlet is provided on the upper shell (11).

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