Vibration motor with low magnetic flux leakage

Abstract

The utility model discloses a vibration motor with low magnetic flux leakage, which belongs to the technical field of vibration motors and comprises a casing, a lower bracket connected to the bottom of the casing, a mass block arranged inside the casing and connected with the casing through two springs, a magnetic steel assembly arranged inside the mass block, an upper pole piece connected to the upper portion of the mass block, and a lower pole piece connected to the lower portion of the mass block. A lower pole piece is connected below the mass block, an FPC is arranged above the lower pole piece, and a coil is connected above the FPC. According to the utility model, the upper pole piece is arranged on the upper surface of the mass block, the lower pole piece is arranged on the lower surface of the mass block, and the magnetic steel assembly and the coil are arranged between the upper pole piece and the lower pole piece, so that the electromagnetic driving force is increased, the effect of low magnetic leakage can be realized, and the vibrator assembly is not influenced by other attractive forces; the position of the oscillator assembly is reliable, and the production yield is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration motors, and in particular relates to a vibration motor with low magnetic leakage. Background Art

[0002] Vibration motors are indispensable components for electronic products such as mobile phones, tablet computers, and handheld game consoles, which provide tactile feedback to users. Currently, mobile consumer electronic products on the market generally use vibration motors as system feedback components, such as incoming call notifications on mobile phones, vibration feedback on game consoles, etc. Compared with traditional rotor motors, linear motors have great advantages in vibration characteristics, response time, service life, noise, etc.

[0003] The mainstream linear vibration motors on the market currently have relatively large magnetic leakage, which may affect the performance of other electronic products. Therefore, there is an urgent need for a vibration motor with low magnetic leakage to meet customer requirements. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a low magnetic leakage vibration motor, which has the characteristics of low magnetic leakage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low magnetic leakage vibration motor, comprising a casing, a lower bracket connected to the bottom of the casing, a mass block provided inside the casing, the mass block being connected to the casing through two springs, a magnetic steel assembly provided inside the mass block, an upper pole piece connected above the mass block, a lower pole piece connected below the mass block, an FPC provided above the lower pole piece, and a coil connected above the FPC.

[0006] In order to provide a bonding surface for the FPC so that the FPC and the coil can be located above the lower pole piece, a bracket is further included, the bracket is installed on the lower bracket, and the FPC is bonded above the bracket.

[0007] Furthermore, the magnetic steel assembly includes three magnetic steels, and the three magnetic steels constitute the Haier shell array.

[0008] In order to provide space for the FPC and the coil, further, an avoidance groove is provided on the bottom surface of the mass block.

[0009] In order to provide positioning for the upper pole piece and the lower pole piece, further, positioning grooves are respectively provided on the upper surface and the lower surface of the mass block.

[0010] In order to serve as a limiting structure to replace the limiting block of a conventional motor, reduce motor materials, increase the mass of the vibrator assembly, and at the same time serve as a bonding table for the damping foam to facilitate the installation of the damping foam, further, skirts are integrally formed on both ends of the mass block.

[0011] In order to provide vibration damping, damping foam is further bonded to the bottom of the skirt.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets an upper pole piece on the upper surface of the mass block, sets a lower pole piece on the lower surface of the mass block, and the magnetic steel assembly and the coil are located between the upper pole piece and the lower pole piece. While increasing the electromagnetic driving force, it can also achieve the effect of low magnetic leakage, and make the vibrator assembly not affected by other suction forces, so that the position of the vibrator assembly is reliable and the production yield is high;

[0014] 2. The utility model also includes a bracket, which is welded on the lower bracket by laser, and the FPC is bonded to the upper part of the bracket by adhesive, providing a bonding surface for the FPC, so that the FPC and the coil can be located above the lower pole piece;

[0015] 3. The two ends of the mass block of the utility model are integrally formed with skirts, which serve as a limit structure to replace the limit block of the conventional motor, reduce motor materials, and increase the mass of the vibrator assembly. At the same time, it can also serve as a bonding table for the damping foam, providing convenience for the installation of the damping foam;

[0016] 4. Damping foam is glued to the bottom of the skirt of the utility model to provide damping for vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the explosion of the structure of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 and 4 It is a structural schematic diagram of the mass block of the utility model;

[0021] Figure 5 It is the electromagnetic schematic diagram of the utility model;

[0022] In the figure: 1. housing; 2. upper pole piece; 3. mass block; 31. skirt; 32. positioning groove; 33. avoidance groove; 4. damping foam; 5. spring; 6. lower pole piece; 7. FPC; 8. lower bracket; 9. bracket; 10. coil; 11. magnetic steel assembly. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1

[0025] See also Figure 1-5 The utility model provides the following technical solutions: a low magnetic leakage vibration motor, comprising a casing 1, a lower bracket 8 is laser welded at the bottom of the casing 1, a mass block 3 is arranged inside the casing 1, the mass block 3 is connected to the casing 1 through two springs 5, one end of the spring 5 is laser welded to the mass block 3, and the other end of the spring 5 is laser welded to the inner wall of the casing 1, a magnetic steel assembly 11 is arranged inside the mass block 3, the magnetic steel assembly 11 includes three magnetic steels, and the three magnetic steels form a Haier shell array, an upper pole piece 2 is laser welded above the mass block 3, the magnetic steel assembly 11 is bonded to the upper pole piece 2 by glue, a lower pole piece 6 is laser welded below the mass block 3, both the upper pole piece 2 and the lower pole piece 6 are magnetic conductive components, an FPC 7 is arranged above the lower pole piece 6, a coil 10 is glued above the FPC 7, and the mass block 3, the magnetic steel assembly 11, the upper pole piece 2 and the lower pole piece 6 form a vibrator assembly.

[0026] By adopting the above technical scheme, the utility model arranges an upper pole piece 2 on the upper surface of the mass block 3, and arranges a lower pole piece 6 on the lower surface of the mass block 3, and the magnetic steel assembly 11 and the coil 10 are both located between the upper pole piece 2 and the lower pole piece 6. While increasing the electromagnetic driving force, it can also achieve the effect of low leakage magnetic field, and make the vibrator assembly not affected by other suction forces, so that the position of the vibrator assembly is reliable and the production yield is high.

[0027] Specifically, it also includes a bracket 9, which is welded on the lower bracket 8 by laser, and the FPC 7 is bonded on the upper part of the bracket 9 by adhesive.

[0028] By adopting the above technical solution, a bonding surface is provided for the FPC 7 , so that the FPC 7 and the coil 10 can be located above the lower pole piece 6 .

[0029] Specifically, an avoidance groove 33 is provided on the bottom surface of the mass block 3 .

[0030] By adopting the above technical solution, space is provided for the FPC 7 and the coil 10 .

[0031] Specifically, positioning grooves 32 are respectively provided on the upper surface and the lower surface of the mass block 3 .

[0032] By adopting the above technical solution, positioning is provided for the upper pole piece 2 and the lower pole piece 6.

[0033] Example 2

[0034] The present embodiment is different from the first embodiment in that: specifically, skirt edges 31 are integrally formed on both ends of the mass block 3 .

[0035] By adopting the above technical solution as a limiting structure, replacing the limiting block of a conventional motor, the motor material can be reduced and the mass of the vibrator assembly can be increased. At the same time, it can also serve as a bonding table for the damping foam 4, providing convenience for the installation of the damping foam 4.

[0036] Example 3

[0037] The difference between this embodiment and the second embodiment is that: specifically, a damping foam 4 is bonded to the bottom of the skirt 31 by glue, and the damping foam 4 is located between the mass block 3 and the spring cantilever.

[0038] By adopting the above technical solution, vibration damping is provided.

[0039] In summary, the utility model sets an upper pole piece 2 on the upper surface of the mass block 3, sets a lower pole piece 6 on the lower surface of the mass block 3, and the magnetic steel component 11 and the coil 10 are located between the upper pole piece 2 and the lower pole piece 6. While increasing the electromagnetic driving force, it can also achieve the effect of low magnetic leakage, and make the vibrator component not affected by other suction forces, so that the position of the vibrator component is reliable and the production yield is high; the utility model also includes a bracket 9, the bracket 9 is welded on the lower bracket 8 by laser, and the FPC 7 is bonded by adhesive Above the bracket 9, a bonding surface is provided for FPC7 so that FPC7 and the coil 10 can be located above the lower pole piece 6; skirts 31 are integrally formed on both ends of the mass block 3 of the utility model as a limiting structure to replace the limiting blocks of conventional motors, reduce motor materials, and increase the mass of the vibrator assembly. At the same time, it can also serve as a bonding table for the damping foam 4, facilitating the installation of the damping foam 4; in the utility model, the damping foam 4 is bonded to the bottom of the skirt 31 by glue to provide damping for vibration.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-leakage magnetic vibration motor, comprising a housing, characterized in that: A lower bracket is connected to the bottom of the casing, a mass block is arranged inside the casing, the mass block is connected to the casing through two springs, a magnetic steel assembly is arranged inside the mass block, an upper pole piece is connected above the mass block, a lower pole piece is connected below the mass block, an FPC is arranged above the lower pole piece, and a coil is connected above the FPC.

2. A low magnetic leakage vibration motor according to claim 1, characterized in that: The invention also comprises a bracket, which is installed on the lower bracket, and the FPC is bonded on the upper part of the bracket.

3. A low magnetic leakage vibration motor according to claim 1, characterized in that: The magnetic steel assembly includes three magnetic steels, and the three magnetic steels form a Haier shell array.

4. The low-leakage magnetic vibration motor according to claim 1, characterized in that: An avoidance groove is arranged on the bottom surface of the mass block.

5. The low-leakage magnetic vibration motor according to claim 1, characterized in that: Positioning grooves are respectively provided on the upper surface and the lower surface of the mass block.

6. The low-leakage magnetic vibration motor according to claim 1, characterized in that: Skirts are integrally formed on both ends of the mass block.

7. A low magnetic flux leakage vibration motor according to claim 6, characterized in that: Damping foam is bonded to the bottom of the skirt.

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