WO2021134320A1

WO2021134320A1 - Vibration motor

Info

Publication number: WO2021134320A1
Application number: PCT/CN2019/130149
Authority: WO
Inventors: 凌芳华; 浦晓峰; 华子旭; 王舒鸣
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08

Abstract

Provided by the present utility model is a vibration motor. The vibration motor comprises a housing, a vibrator assembly and a restoring member, the housing is provided with an accommodating space, and the vibrator assembly and the restoring member are installed in the accommodating space. The vibrator assembly is used to reciprocate in the accommodating space after being powered on to as to strike the housing. The restoring member is connected to the housing, the restoring member is installed on the outer side of the vibrator assembly, and two end parts of the restoring member are provided on two sides of the vibrator assembly respectively, and are in contact with the vibrator assembly so as to form a restoring force between the restoring member and the vibrator assembly after the vibrator assembly is powered off, and the restoring force is used to reset the vibrator assembly. In the vibration motor provided by the present utility model, the existing solution in which the number of springs is generally an even number is replaced by one spring, which reduces the number of springs, and at the same time, also reduces the number of protection plates, thereby simplifying the assembly process.

Description

A kind of vibration motor

Technical field

The utility model relates to the technical field of vibration motors, in particular to a vibration motor.

Background technique

The X-axis linear motor is a type of vibration motor. The number of springs of the existing X-axis linear motor is an even number, 2 or 4. When the spring is welded to the housing, a protective cover must be welded.

The existing X-axis linear motor has many parts and the assembly is relatively complicated.

Summary of the invention

technical problem

The purpose of the utility model is to provide a vibrating motor to solve the problems of the existing X-axis linear motor with many parts and complicated assembly.

The solution to the problem

Technical solutions

The technical scheme of the utility model is as follows: the utility model provides a vibration motor, the vibration motor includes a housing, a vibrator assembly and a return part, the housing is provided with an accommodation space, the vibrator assembly and the return part are installed in The containment space;

The vibrator assembly is used to make a reciprocating movement in the receiving space to hit the housing after power on;

The restoring member is connected to the housing, the restoring member is installed on the outside of the vibrator assembly, and both ends of the restoring member are respectively arranged on both sides of the vibrator assembly and are in contact with the vibrator assembly , For forming a restoring force between the restoring member and the vibrator assembly after the vibrator assembly is powered off, and the restoring force is used to reset the vibrator assembly.

As an improvement, the vibrator assembly includes a plurality of impact walls. After the vibrator assembly is energized, it reciprocates in the containing space and strikes the housing through the plurality of impact walls.

As an improvement, the restoring member includes a fixed main body and a plurality of elastic arms extending from the periphery of the fixed main body; the fixed main body and the vibrator assembly are spaced apart, and the fixed main body and the shell The body is fixedly connected to fix a plurality of elastic arms; the first end of each of the plurality of elastic arms away from the fixed body is in contact with the corresponding impact wall, and the plurality of elastic arms are respectively arranged on two of the vibrator assembly The side is used to form a restoring force between the plurality of elastic arms and the vibrator assembly after the vibrator assembly is powered off.

As an improvement, the vibrator assembly includes a plurality of side walls connected to a plurality of impact walls and arranged at intervals, and the fixed body faces one of the side walls;

The restoring member includes two elastic arms extending from the circumference of the fixed body, the two elastic arms are symmetrical with respect to the vibrator assembly, and each elastic arm is close to the second end of the fixed body No contact with the vibrator assembly.

As an improvement, the two elastic arms respectively face the corresponding impact wall, and the first end of any one of the elastic arms is in contact with the end of the impact wall away from the fixed body. The second end of the arm is spaced apart from the end of the impact wall close to the fixed body.

As an improvement, the bottom surface of the vibrator assembly away from the fixed body is provided with a boss, and any elastic arm is bent around the corresponding impact wall and extends in a direction close to the boss until any elastic arm is bent. The first ends of the arms are in contact with the bosses.

As an improvement, the first end of any elastic arm is equipped with a baffle on the side away from the vibrator assembly.

As an improvement, the vibrator assembly includes a mass block, a plurality of magnets installed inside the mass block and spaced apart, and a voice coil installed on the shell and spaced apart from the mass block;

The mass block includes several impact walls;

After the voice coil is energized, a magnetic force is formed between the plurality of magnetic steels, and the magnetic force is used to make the vibrator assembly reciprocate in the housing and strike the housing through a plurality of impact walls.

As an improvement, the housing includes a frame that forms an opening at the bottom of the accommodating space, a mounting plate that cooperates with the frame, the voice coil is connected to the mounting plate, and the return piece is connected to the frame. .

As an improvement, the vibrator assembly includes a cover plate, the mass is also provided with a groove for accommodating the cover plate, and the cover plate is matedly connected with the groove.

The beneficial effects of the invention

Beneficial effect

The beneficial effects of the utility model are:

The restoring member is connected to the housing, the restoring member is installed on the outside of the vibrator assembly, and both ends of the restoring member are symmetrically arranged on both sides of the vibrator assembly and are in contact with the vibrator assembly , In order to form a restoring force between the restoring member and the vibrator assembly after the vibrator assembly is powered off, the restoring force is used to reset the vibrator assembly; the number of existing springs is replaced by a spring, which is an even number The solution reduces the number of springs and also reduces the number of protective sheets, thereby simplifying the assembly process.

Brief description of the drawings

Description of the drawings

Figure 1 is a three-dimensional structural diagram of a vibration motor provided by an embodiment of the utility model;

Fig. 2 is a schematic diagram of an exploded structure of a vibration motor provided by an embodiment of the utility model;

Fig. 3 is a top view of the restoring member and vibrator assembly of the vibrating motor of Fig. 2;

Fig. 4 is a schematic diagram of an exploded structure of a vibration motor provided by another embodiment of the utility model;

Fig. 5 is a top view of the restoring member and vibrator assembly of Fig. 4.

In the figure: 10, shell; 11, frame; 12, mounting plate; 13, containing space; 20, vibrator assembly; 21, mass; 211, boss; 212, impact wall; 213, side wall; 22, Magnetic steel; 23, voice coil; 24, baffle piece; 25, cover plate; 26, groove; 30, return piece; 31, fixed body; 32, first elastic arm; 321, first end; 322, first Two ends; 33, the second elastic arm; 331, the third end; 332, the fourth end.

Invention embodiment

Detailed ways

The present utility model will be further explained below in conjunction with the drawings and embodiments.

Example 1

Please refer to FIGS. 1 and 2, an embodiment of the present invention provides a vibration motor. The vibration motor includes a housing 10, a vibrator assembly 20 and a restoring member 30. The housing 10 is provided with a receiving space 13, and the vibrator assembly 20 and the restoring member 30 are installed in the receiving space 13. The vibrator assembly 20 is used to reciprocate in the receiving space 13 to hit the housing 10 after being energized.

The restoring member 30 is connected to the housing 10, and the restoring member 30 is installed on the outside of the vibrator assembly 20; the two ends of the restoring member 30 are respectively provided on both sides of the vibrator assembly 20 and connected to each other. The vibrator assembly 20 is in contact to form a restoring force between the restoring member 30 and the vibrator assembly 20 after the vibrator assembly 20 is powered off, and the restoring force is used to reset the vibrator assembly 20; preferably , The restoring member 30 is a spring, and both ends of the restoring member 30 are symmetrical with respect to the vibrator assembly 20. The existing solution that the number of springs is even numbered is replaced by a spring, which reduces the number of springs and also Reduce the number of protective sheets, thereby simplifying the assembly process.

In one embodiment, the vibrator assembly 20 includes several impact walls 212; it should be noted that the impact wall 212 here is the side of the vibrator assembly 20 in the reciprocating direction, and is a part of the vibrator assembly 20. For ease of description, It is named the impact wall 212; the vibrator assembly 20 reciprocates in the receiving space 13 after being energized, and strikes the housing 10 through a number of impact walls 212.

The restoring member 30 includes a fixed main body 31 and a plurality of first elastic arms 32 extending from the periphery of the fixed main body 31; preferably, the connection between the plurality of first elastic arms 32 and the fixed main body 31 is Arc shape; the fixed body 31 and the vibrator assembly 20 are spaced apart; the fixed body 31 is fixedly connected to the housing 10 for fixing a plurality of first elastic arms 32; each of the plurality of first elastic arms The first end 321 of the arm 32 away from the fixed body 31 is in contact with the corresponding impact wall 212, and a plurality of first elastic arms 32 are symmetrically arranged on both sides of the vibrator assembly 20 for breaking the vibrator assembly 20. After electricity, a restoring force is formed between the plurality of first elastic arms 32 and the restoring member 30.

3, in one embodiment, the vibrator assembly 20 includes a plurality of side walls 213 connected to a plurality of impact walls 212 and spaced apart, the fixed body 31 faces one of the side walls 213; the restoring member 30 includes Two first elastic arms 32 extending from the circumference of the fixed body 31, each of the first elastic arms 32 near the second end 322 of the fixed body 31 does not contact the vibrator assembly 20; preferably Ground, the fixed main body 31 and the two first elastic arms 32 are both belt-shaped, and the fixed main body 31 and the two first elastic arms 32 are integrally formed; this only keeps each of the first elastic arms 32 away from each other. The first end 321 of the fixed body 31 is in contact with the corresponding impact wall 212, and a plurality of first elastic arms 32 are arranged symmetrically with respect to the vibrator assembly 20 to ensure that the vibrator assembly 20 receives a symmetrical and balanced restoring force. It is convenient for the vibrator assembly 20 to form a symmetrical restoring force between the first elastic arms 32 and the restoring member 30 after the vibrator assembly 20 is powered off, so that the vibrator assembly 20 returns to the position before being powered on.

Specifically, the bottom surface of the vibrator assembly 20 away from the fixed body 31 is provided with a boss 211, and any of the first elastic arms 32 surround the corresponding impact wall 212 and then bend and approach the boss 211. Extend until the first end 321 of any first elastic arm 32 is in contact with the boss 211, more specifically, the second end 322 of any first elastic arm 32 is far from the vibrator assembly 20 The distance between the two elastic arms 32 is greater than the distance between the bend of any first elastic arm 32 and the vibrator assembly 20; the restoring member 30 fixes the main body 31 toward a side wall 213 of the vibrator assembly 20, and the two first elastic arms 32 surround the corresponding impact After the wall 212 is in contact with the other side wall 213 away from the vibrator assembly 20, an enclosing structure can be formed on the outside of the vibrator assembly 20, and the length of the restoring member 30 is increased, thereby increasing the two first elastic arms 32 and the vibrator assembly 20. The restoring force in between shortens the restoring time of the vibrator assembly 20 after the power is off.

Specifically, the vibrator assembly 20 includes a mass 21, a plurality of magnets 22 installed inside the mass 21 and spaced apart, and a voice coil installed on the housing 10 and spaced apart from the mass 21 23; the mass 21 includes a number of impact walls 212; after the voice coil 23 is energized to form a magnetic force between the plurality of magnetic steel 22, the magnetic force is used to make the vibrator assembly 20 in the The housing 10 reciprocates and strikes the housing 10 through a number of impact walls 212; the housing 10 includes a frame 11 forming an opening at the bottom of the accommodating space 13, and a mounting plate 12 that cooperates with the frame 11, The voice coil 23 is connected to the mounting plate 12, and the restoring member 30 is connected to the frame 11; the vibrator assembly 20 includes a cover plate 25, and the mass 21 is also provided with the cover plate 25, the cover plate 25 is connected to the groove 26 in a mating manner.

It should be noted that not only after the vibrator assembly 20 is powered off, a restoring force is formed between the vibrator assembly 20 and the restoring member 30; when the vibrator assembly 20 is powered on, a restoring force will also be formed between the vibrator assembly 20 and the restoring member 30. This is because the restoring member 30 is elastic as a whole; but the Lorentz force generated when the vibrator assembly 20 is energized is greater than the elastic force of the restoring member 30.

It should be noted that the X-direction (that is, the reverse of the reciprocating motion of the vibrator assembly 20 in this solution) of the vibration motor or the Z-direction (that is, the direction perpendicular to the plane where the voice coil 23 is located) vibration of the vibration motor is related to two factors: one It is the frequency of the driving signal, and the other is the direction of the driving force; the way of the Lorentz force generated after the vibrator assembly 20 is energized is: the first-order frequency is used to drive the vibrator assembly 20 to move in the X direction in the containing space 13.

Specifically, the first end portion 321 of any first elastic arm 32 is equipped with a baffle 24 on the side away from the vibrator assembly 20, so that when the vibrator assembly 20 reciprocates, the baffle 24 and the housing Friction between 10, thereby protecting the restoring member 30.

Example 2

In this embodiment, except that the restoring member, the shape of the vibrator assembly 20, and the connection relationship between the restoring member and the vibrator assembly 20 are different from those in the first embodiment, the rest are the same.

4 and 5, the two second elastic arms 33 respectively face the corresponding impact wall 212, and the third end 331 of any second elastic arm 33 and the impact wall 212 are away from the fixed body 31 The fourth end 332 of any second elastic arm 33 is spaced apart from the end of the impact wall 212 close to the fixed body 31; the length of the restoring member 30 is greater than the length of the impact wall 212, which is convenient for making The vibrator assembly 20 is reset, and the resistance generated by the return member 30 when the vibrator assembly 20 reciprocates is reduced.

It should be noted that all directional indications (such as up, down, inside, outside, top, bottom...) in the embodiments of the present invention are only used to explain the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the relative positional relationship between them, etc., the directional indication will also change accordingly.

It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, the element may be directly on the other element or a centering element may exist at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

The above are only the embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these all belong to The scope of protection of the utility model.

Claims

A vibration motor, characterized in that, the vibration motor includes a housing, a vibrator assembly and a restoring member, the housing is provided with a containing space, and the vibrator assembly and the restoring member are installed in the containing space;

The vibrator assembly is used to make a reciprocating movement in the receiving space to hit the housing after power on;

The restoring member is connected to the housing, the restoring member is installed on the outside of the vibrator assembly, and both ends of the restoring member are respectively arranged on both sides of the vibrator assembly and are in contact with the vibrator assembly , For forming a restoring force between the restoring member and the vibrator assembly after the vibrator assembly is powered off, and the restoring force is used to reset the vibrator assembly.
The vibration motor according to claim 1, wherein the vibrator assembly includes a plurality of impact walls, and the vibrator assembly reciprocates in the containing space after being energized, and strikes the housing through the plurality of impact walls.
The vibration motor according to claim 2, wherein the restoring member includes a fixed main body and a plurality of elastic arms extending from the periphery of the fixed main body; the fixed main body and the vibrator assembly are spaced apart , The fixed body is fixedly connected to the housing for fixing a plurality of elastic arms; the first end of each of the plurality of elastic arms away from the fixed body is in contact with the corresponding impact wall and the plurality of elastic arms They are respectively arranged on both sides of the vibrator assembly to form a restoring force between the plurality of elastic arms and the vibrator assembly after the vibrator assembly is powered off.
The vibration motor according to claim 3, wherein the vibrator assembly includes a plurality of side walls connected to a plurality of impact walls and arranged at intervals, and the fixed body faces one of the side walls;

The restoring member includes two elastic arms extending from the circumference of the fixed body, the two elastic arms are symmetrical with respect to the vibrator assembly, and each elastic arm is close to the second end of the fixed body No contact with the vibrator assembly.
The vibration motor according to claim 4, wherein the two elastic arms respectively face the corresponding impact wall, and the first end of any one of the elastic arms and the impact wall are away from the fixed body One end is in contact, and the second end of any one of the elastic arms is spaced apart from one end of the impact wall close to the fixed body.
The vibration motor according to claim 4, characterized in that: the bottom surface of the vibrator assembly away from the fixed body is provided with a boss, and any elastic arm is bent around the corresponding impact wall and is approached to the boss. The direction of the platform extends until the first end of any elastic arm is in contact with the boss.
The vibration motor according to claim 5 or 6, wherein the first end of any one of the elastic arms is equipped with a baffle on the side away from the vibrator assembly.
The vibration motor according to claim 7, characterized in that: the vibrator assembly comprises a mass block, a number of magnetic steels installed inside the mass block and spaced apart, installed on the shell and connected to the mass block Voice coil set at intervals;

The mass block includes several impact walls;

After the voice coil is energized, a magnetic force is formed between the plurality of magnetic steels, and the magnetic force is used to make the vibrator assembly reciprocate in the housing and strike the housing through a plurality of impact walls.
The vibration motor according to claim 8, wherein the housing includes a frame that forms an opening at the bottom of the accommodating space, and a mounting plate that cooperates with the frame, and the voice coil is connected to the mounting plate. The reply piece is connected with the frame.
The vibration motor according to claim 9, characterized in that: the vibrator assembly includes a cover plate, the mass is further provided with a groove for accommodating the cover plate, and the cover plate is matedly connected with the groove .