The present disclosure relates to motors, in particular to a linear vibration motor for providing tactile feedback.
Portable electronic devices such as mobile phones, handheld game consoles, and navigation devices in the prior art are becoming more and more popular. These products generally use linear vibration motors for system feedback, such as mobile phone call prompts, information prompts, navigation prompts, and vibration feedback from game consoles.
A related linear vibration motor usually includes a housing with an accommodation space, a stator accommodated in the housing, a vibrator, and a V-shaped spring. The stator includes a voice coil (coil), an iron core, a magnetic conductive sheet and FPC (Flexible Printed Circuit). The vibrator includes a magnet and a weight. The vibrator and the stator are connected by a V-shaped spring. The magnet is arranged in the middle of the upper and lower stator.
As for the related linear vibration motor, foam is provided on the side of the V-shaped spring close to the weight and the side of the weight facing the V-shaped spring. And the foam is located in the middle of the weight side to increase the damping value of the linear vibration motor by setting the above foam. Adding foam to the linear vibration motor, however, will cause the V-new spring to deform greatly after the foam is compressed. As a result, the damping value provided by the foam located in the middle of the weight side is smaller. Cannot meet the performance requirements of linear vibration motors.
One of the objects of the present invention is to provide a linear vibration motor which improves damping performance and reduces assembly costs.
To achieve the above-mentioned objects, the present invention provides a linear vibration motor having a box body with an inner cavity; a weight accommodated in the box body; a stator in the box body; an elastic member suspending the weight in the box body, including a first elastic member and a second elastic member fixedly connected to opposite sides of the weight; and a first damping glue locating between and abutting against the first elastic member and the weight. The first elastic member includes a first fixed part fixedly connected to the weight and a first elastic bracket extending from the first fixed part; the first damping glue locates at one end of the first elastic bracket close to the first fixed part.
In addition, the first elastic member further includes a second fixed part opposite to the first fixed part and fixedly connected to an inner wall of the box body, and a second elastic brake extending from the second fixed part and connecting with the first elastic brake for forming a V shape.
In addition, a side of the weight facing the first elastic member forms a first accommodation cavity for accommodating the first damping glue; the first damping glue is embedded in the first accommodation cavity and protrudes out of the first accommodation cavity.
In addition, the linear vibration motor further comprises a second damping glue connected between the second elastic member and the weight, wherein the second elastic member locates on a side of the weight away from the first elastic member; the second elastic member includes a third fixed part fixedly connected to the weight and a third elastic bracket extending from the third fixed part; the second damping glue is arranged at one end of the third elastic bracket close to the third fixed part.
In addition, the second elastic member further includes a fourth fixed part fixedly connected to an inner wall of the box body, and a fourth elastic bracket extending from the fourth fixed part and bendingly connected to the third elastic bracket for forming a V shape; the third fixed part is arranged opposite to the fourth fixed part.
In addition, a side of the weight facing the second elastic member forms a second accommodation cavity for accommodating the second damping glue which protrudes out of the second accommodation cavity.
In addition, one end of the first accommodation cavity penetrates the bottom of the weight, and the other end extends toward the top of the weight to a set distance; a first sealant is received in the first accommodation cavity on a side close to the bottom of the weight; the first damping glue is located on a side of the first sealant away from the bottom of the weight.
In addition, the linear vibration motor further comprises a second sealant in the first accommodation cavity; wherein the first damping glue locates between the first sealant and the second sealant.
In Addition, wherein one end of the second accommodation cavity penetrates the bottom of the weight, and the other end extends toward the top of the weight for forming a distance; a third sealant is provided in the second accommodation cavity on a side close to the bottom of the weight; the second damping glue is located on a side of the third sealant away from the bottom of the weight.
In addition, the linear vibration motor further comprises a fourth sealant in the second accommodation cavity; and the second damping glue locates between the third sealant and the fourth sealant.
Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.
The present disclosure will hereinafter be described in detail with reference to exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figures and the embodiments. It should be understood the specific embodiments described hereby are only to explain the disclosure, not intended to limit the disclosure.
As shown in
A first damping glue 5 abuts between the side walls of the first elastic member 4 and the weight 2 in the direction close to one end of the first fixed part 43. By virtue of the first damping glue 5, when the weight 2 is displaced in the box body 1, the first damping glue 5 causes the first elastic member 4 and the weight 2 to produce greater mechanical damping. Wherein, the rigidity of the first damping glue 5 is weaker than that of the foam compared with the foam used in the prior art. Therefore, it is difficult to cause excessive deformation of the elastic member after the foam is compressed. As a result, the damping value provided by the foam becomes smaller, thereby reducing the impact on the operating frequency of the linear vibration motor. In addition, in the assembly process of the linear vibration motor, assembling the first damping glue 5 only needs to be injected and fixed. Compared with the foam assembly process in the prior art, the assembly process using the first damping glue 5 is simpler and the assembly cost is lower.
The first damping glue 5 is arranged close to the junction of first elastic bracket 41 and the weight 2. That is, first damping glue 5 is arranged close to the first fixed part 43. The first elastic member 4 is arranged in a V shape, so that a gap with an included angle is formed between the first elastic member 4 and the side wall of the weight 2. In turn, the closer to the connection, the smaller the gap. Therefore, it is difficult for the first damping glue 5 arranged near the above-mentioned connection to leak through the above-mentioned gap.
As a specific embodiment, as shown in
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Wherein, the first accommodation cavity 6 is arranged close to the first fixed part 43. Set the first accommodation cavity 6 close to the first fixed part 43 to increase the volume of the first damping glue 5. In this way, the first damping glue 5 can not only be set close to the gap between the first elastic brake 41 and the weight 2, but also, the position of the first damping glue 5 is restricted by the space formed by the first accommodation cavity 6 and the first elastic member 4. In this way, it is difficult for the first damping glue 5 to be separated from the weight 2 from the first accommodation cavity 6.
The first damping glue 5 is embedded in the first accommodation cavity 6. And one end of the first damping glue 5 protruding from the accommodation cavity abuts with the first elastic member 4. Insert the first damping glue 5 into the first accommodation cavity 6 and install it. In this way, the first damping glue 5 can achieve a self-fixing effect in the first accommodation cavity 6, and the part protruding from the side wall of the weight 2 abuts the first elastic member 4 through the first damping glue 5. Not only does it make it difficult for the first damping glue 5 to break away from the first accommodation cavity 6 and weight 2. It can effectively ensure the damping performance of the first damping glue 5, thereby reducing the impact on the operating frequency of the linear vibration motor.
As shown in
The second elastic member 7 is located on the side of weight 2 away from the first elastic member 4. And one end of the second elastic member 7 is connected to the end of the side wall of the weight 2. The other end is connected with the side wall of the box body 1 away from the first elastic member 4. Set second elastic member 7 on the side of weight 2 away from first elastic member 4. In order to achieve the purpose of suspending weight 2 in box body 1, the friction of weight 2 in box body 1 is reduced.
A second damping glue 8 abuts between the side wall of the second elastic member 7 and the side wall of the weight 2 in the direction close to the end of the third fixed part 73. A second damping glue 8 is arranged so that when the weight 2 is displaced between the first elastic member 4 and the second elastic member 7, the second damping glue 8 will cause greater mechanical damping between the second elastic member 7 and the weight 2. Wherein, the second damping glue 8 is less rigid than the foam used in the prior art in terms of rigidity. Therefore, it is difficult to cause excessive deformation of the elastic member after the foam is compressed. As a result, the damping value provided by the foam becomes smaller, thereby reducing the impact on the operating frequency of the linear vibration motor. In addition, in the assembly process of the linear vibration motor, assembling the second damping glue 8 only needs to be injected and fixed. Compared with the foam assembly process in the prior art, the assembly process using the second damping glue 8 is simpler and the assembly cost is lower.
The second damping glue 8 is arranged close to the connection between the third elastic bracket 71 of the second elastic member 7 and the weight 2. That is, the second damping glue 8 is arranged close to the third fixed part 73. Because the second elastic member 7 is arranged in a V shape, a gap with an included angle is formed between the second elastic member 7 and the side wall of the weight 2. In turn, the closer to the connection, the smaller the gap. In this way, the second damping glue 8 located near the above-mentioned connection is difficult to leak through the above-mentioned gap.
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As a specific embodiment, as shown in
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Specifically, the viscosity of the first sealant 10 is higher than that of the first damping glue 5, so as to effectively restrict the injection into the first damping glue 5 in the first accommodation cavity 6. To minimize the leakage of the first damping glue 5 when injected into the first accommodation cavity 6.
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A third sealant 30 is provided in the second accommodation cavity 9 on the side close to the top of the weight 2. The second damping glue 8 is located on the side of the third sealant 300 away from the top of the weight 2. The third sealant 30 is arranged at the end of the second accommodation cavity 9 close to the bottom wall of the box body 1 to reduce the leakage of the second damping glue 8 when injected into the second accommodation cavity 9.
Specifically, the viscosity of the second sealant 20 is higher than that of the second damping glue 8, so as to effectively limit the injection to the second damping glue 8 in the second accommodation cavity 9. To minimize the leakage of the second damping glue 8 when injected into the second accommodation cavity 9.
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As a specific embodiment, as shown in
It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.
Number | Date | Country | Kind |
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202121001582.7 | May 2021 | CN | national |