Miniature vibration motor

Abstract

The utility model discloses a miniature vibration motor, which belongs to the technical field of vibration motors and comprises a casing, a coil is connected onto the inner wall of the casing, a magnetic steel component is arranged in the casing, mass blocks are connected to the upper side and the lower side of the magnetic steel component respectively, and one side, far away from the magnetic steel component, of each mass block is connected with an inner ring of a spring. The outer ring of the side, away from the mass block, of the spring is connected with a lower bracket, the lower bracket is connected with the machine shell, the magnetic steel assembly comprises two pieces of magnetic steel, and magnetic poles of the two pieces of magnetic steel are arranged in a repulsive mode. According to the utility model, the magnetic steel assemblies are arranged in most space inside the casing, and the magnetic poles of the two magnetic steels are arranged in a repulsive manner, so that the driving force of the motor is large, the reverse electromotive force is also large, the motor has enough large electromagnetic damping, and the effect of quick start and stop can be realized without additional damping parts.

Description

Technical Field

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

[0002] Vibration motors are essential components for mobile phones, tablet computers, handheld game consoles and other electronic products, 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.

[0003] Compared with traditional rotor motors, linear motors have great advantages in vibration characteristics, response time, service life, noise, etc. The mainstream linear vibration motors on the market are currently large in size and are not easy to use in tiny consumer electronics such as styluses.

[0004] Therefore, there is an urgent need for a miniature vibration motor that can achieve fast start and stop and has a reliable life, and can be used in miniature consumer electronics such as styluses. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a micro vibration motor, which has the characteristics of being able to realize fast start and stop, having a reliable life, and can be used in micro-miniature consumer electronics such as a stylus pen.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro vibration motor, comprising a casing, a coil connected to the inner wall of the casing, and a magnetic steel assembly provided inside the casing, the upper and lower sides of the magnetic steel assembly are respectively connected to mass blocks, the side of the mass block away from the magnetic steel assembly is connected to the inner ring of the spring, the outer ring of the spring away from the mass block is connected to the lower bracket, the lower bracket is connected to the casing, the magnetic steel assembly comprises two magnets, wherein the magnetic poles of the two magnets are arranged to repel each other.

[0007] In order to gather the magnetic field and increase the driving force, a pole piece is further provided between the two magnets.

[0008] In order to increase the cantilever and life of the spring, the spring is further configured as a double-ribbed spring.

[0009] In order to coordinate with the housing for positioning and increase the convenience of spring assembly, the spring is further provided with a positioning slot corresponding to the housing.

[0010] In order to facilitate the glue spotting and bonding of the coil, two symmetrically arranged glue injection holes are further provided on the side of the housing.

[0011] In order to ensure the strength of the casing, the casing is further of a bending and riveting forming structure, and a riveting slot is provided on the connecting edge of the casing.

[0012] Furthermore, two symmetrical positioning grooves are provided on the mass block.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Most of the space inside the housing of the utility model is a magnetic steel assembly, and the magnetic poles of the two magnetic steels are arranged to repel each other, so that the driving force of the motor is large, and the reverse electromotive force is also large, so that the motor itself has a sufficiently large electromagnetic damping, so that the effect of rapid start and stop can be achieved without additional damping components;

[0015] 2. The spring of the utility model is provided with a positioning slot corresponding to the housing, which cooperates with the housing for positioning, thereby increasing the convenience of spring assembly;

[0016] 3. The spring of the utility model is a double-ribbed spring. Compared with the conventional three-ribbed spring, the cantilever of the double-ribbed spring is longer and its service life is significantly higher than that of the conventional three-ribbed spring;

[0017] 4. Two symmetrically arranged glue injection holes are provided on the side of the casing of the utility model, which facilitates the glue spotting and bonding of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the explosion of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the magnetic steel assembly of the utility model;

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the casing of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the spring of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the assembly of the spring and the housing of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the mass block of the utility model;

[0026] In the figure: 1, lower bracket; 2, spring; 21, positioning slot; 3, mass block; 31, positioning slot; 4, magnetic steel assembly; 41, magnetic steel; 42, pole piece; 5, coil; 6, housing; 61, glue injection hole; 62, riveting slot. 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] Example 1

[0029] See also Figure 1-7 The utility model provides the following technical solutions: a micro vibration motor, including a casing 6, the casing 6 can be magnetic or non-magnetic. The present embodiment is preferably made of magnetic conductive material to increase the electromagnetic driving force and also increase the electromagnetic damping. A coil 5 is bonded to the inner wall of the casing 6 by glue, and a magnetic steel assembly 4 is provided inside the casing 6. The upper and lower sides of the magnetic steel assembly 4 are respectively bonded with mass blocks 3 by glue. The mass block 3 provides a welding table for welding the spring 2 and can also increase the mass of the vibrator assembly, thereby enhancing the vibration sense. The side of the mass block 3 away from the magnetic steel assembly 4 is connected to the inner ring of the spring 2 by welding, and the outer ring of the spring 2 away from the side of the mass block 3 is connected to the lower bracket 1 by welding. The lower bracket 1 and the casing 6 are laser welded. The magnetic steel assembly 4 includes two magnetic steels 41, wherein the magnetic poles of the two magnetic steels 41 are arranged to repel each other.

[0030] By adopting the above technical solution, most of the space inside the casing 6 of the utility model is the magnetic steel assembly 4, and the magnetic poles of the two magnetic steels 41 are arranged to repel each other, so that the driving force of the motor is large and the reverse electromotive force is also large, so that the motor itself has sufficiently large electromagnetic damping, so that the effect of rapid start and stop can be achieved without additional damping components.

[0031] Specifically, a pole piece 42 is provided between the two magnetic steels 41 , and the two magnetic steels 41 are respectively bonded to the pole piece 42 by glue.

[0032] The above technical solution is adopted to gather the magnetic field and increase the driving force.

[0033] Specifically, a positioning slot 21 corresponding to the housing 6 is provided on the spring 2 .

[0034] By adopting the above technical solution and coordinating with the housing 6 for positioning, the convenience of assembling the spring 2 is increased.

[0035] Example 2

[0036] The present embodiment is different from the embodiment 1 in that: specifically, the spring 2 is a double-ribbed spring.

[0037] By adopting the above technical solution, compared with the conventional three-rib spring, the cantilever of the double-rib spring is longer and the service life is significantly higher than that of the conventional three-rib spring.

[0038] Example 3

[0039] The present embodiment is different from the first embodiment in that: specifically, two symmetrically arranged glue injection holes 61 are provided on the side surface of the housing 6 .

[0040] By adopting the above technical solution, it is convenient for the coil 5 to be glued.

[0041] Example 4

[0042] The present embodiment is different from the first embodiment in that: specifically, the housing 6 is a bending riveted structure, a riveted slot 62 is provided on the connecting edge of the housing 6, and the edge of the riveted slot 62 can be reinforced by laser welding.

[0043] By adopting the above technical solution, the strength of the housing 6 is ensured.

[0044] Example 5

[0045] The present embodiment is different from the first embodiment in that: specifically, two symmetrical positioning grooves 31 are provided on the mass block 3 .

[0046] By adopting the above technical solution, when assembling the vibrator assembly, the spatial position of the vibrator inside the casing is limited by the slots of the upper and lower mass blocks 3.

[0047] In summary, most of the space inside the casing 6 of the utility model is the magnetic steel assembly 4, and the magnetic poles of the two magnetic steels 41 are set to repel each other, so that the driving force of the motor is large, and the reverse electromotive force is also large, so that the motor itself has sufficiently large electromagnetic damping, so that the effect of rapid start and stop can be achieved without additional damping components; the spring 2 of the utility model is provided with a positioning slot 21 corresponding to the casing 6, which cooperates with the casing 6 for positioning, thereby increasing the convenience of assembling the spring 2; the spring 2 of the utility model is a double-rib spring, and compared with the conventional three-rib spring, the double-rib spring has a longer cantilever and a service life that is significantly higher than the conventional three-rib spring; two symmetrically arranged glue injection holes 61 are provided on the side of the casing 6 of the utility model, which provide convenience for the glue spot bonding of the coil 5.

[0048] 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 with 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 micro vibration motor, comprising a housing, characterized in that: A coil is connected to the inner wall of the casing, and a magnetic steel assembly is provided inside the casing. Mass blocks are connected to the upper and lower sides of the magnetic steel assembly respectively. The side of the mass block away from the magnetic steel assembly is connected to the inner circle of the spring, and the outer circle of the spring away from the mass block is connected to the lower bracket, and the lower bracket is connected to the casing.

2. A micro vibration motor according to claim 1, characterized in that: The magnetic steel assembly includes two magnetic steels, wherein the magnetic poles of the two magnetic steels are arranged to repel each other.

3. A micro vibration motor according to claim 2, characterized in that: A pole piece is provided between the two magnets.

4. A micro vibration motor according to claim 1, characterized in that: The spring is a double-rib spring.

5. A micro vibration motor according to claim 1, characterized in that: The spring is provided with a positioning slot corresponding to the housing.

6. A micro vibration motor according to claim 1, characterized in that: Two symmetrically arranged glue injection holes are arranged on the side surface of the casing.

7. A micro vibration motor according to claim 1, characterized in that: The casing is a bending and riveting forming structure, and a riveting slot is provided on the connecting edge of the casing.

8. A micro vibration motor according to claim 1, characterized in that: The mass block is provided with two symmetrical positioning grooves.

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