Vibration motor

Abstract

The utility model provides a vibration motor, which comprises a shell with an accommodating space, a vibration unit accommodated in the accommodating space, a non-metal elastic piece fixed in the shell, and a driving assembly accommodated in the shell and used for driving the vibration unit to vibrate, and the vibration unit is elastically suspended in the accommodating space by the elastic piece. According to the utility model, the elastic member of the vibration motor is made of the non-metal material, so that the good stability of the elastic member can be ensured, the vibration motor can be designed to be thinner, the shape designability of the elastic member is higher, the development space is larger, the assembly process is simple, the cost is saved, and the service life of the vibration motor can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration, and particularly relates to a vibration motor. Background Art

[0002] A vibration motor is a machine that converts other forms of energy into mechanical vibration, and is mainly applied to devices that need to generate vibration, such as mobile phones with vibration sensation, game consoles, tablets, and VR devices.

[0003] The vibration motor mainly includes a housing, a vibration unit housed in the housing, an elastic member that elastically suspends the vibration unit in the housing, and a driving assembly fixed in the housing and used to drive the vibration unit to vibrate.

[0004] In the related art, the elastic member mainly adopts a metal spring or a metal shrapnel. In this elastic support method made of metal, when the vibration unit vibrates, the amplitude of the vibration unit is easily limited by the stress of the elastic member. For example, when the amplitude of the vibration unit is greater than 0.65 mm and in an environment with 65% relative humidity and 95 degrees Celsius, the risk of fracture and failure of the elastic member will increase; the elastic member made of metal will also limit the designed thickness of the vibration motor. For example, when the thickness of the vibration motor is less than 2.4 mm, due to the increase in the stress of the elastic member, the risk of its fracture and failure will also increase; the elastic member made of metal can only be made by stamping, and its shape designability is low and the space for play is small; the elastic member made of metal also needs to be connected to the vibration unit and the housing by laser welding, which is prone to the risk of welding failure, and it is necessary to use a solder pad to press and limit the position, and the assembly process is cumbersome and costly.

[0005] In summary, in the vibration motor in the related art, the elastic support method using an elastic member made of metal is prone to the risk of elastic member failure, and will limit the designed thickness of the vibration motor. At the same time, the shape designability is low, the space for play is small, the assembly process is cumbersome, and the cost is high.

[0006] Therefore, it is necessary to provide a new vibration motor to solve the above technical problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a new vibration motor to solve the problems in the related art that the elastic support method using an elastic member made of metal in the vibration motor is prone to the risk of elastic member failure, and will limit the designed thickness of the vibration motor. At the same time, the shape designability is low, the space for play is small, the assembly process is cumbersome, and the cost is high.

[0008] The present utility model provides a vibration motor, which includes a housing having a receiving space, a vibration unit received in the receiving space, a non-metallic elastic member fixed in the housing, and a driving assembly received in the housing and driving the vibration unit to vibrate. The elastic member elastically suspends the vibration unit in the receiving space.

[0009] Preferably, the non-metallic elastic member is any one of a silica gel elastic member, a plastic elastic member, and a resin elastic member.

[0010] Preferably, there are two non-metallic elastic members, which are respectively arranged on opposite sides of the vibration unit along the vibration direction of the vibration unit; each non-metallic elastic member includes a first fixing arm fixed to the housing, a second fixing arm fixed to the vibration unit, and an elastic arm connecting the first fixing arm and the second fixing arm.

[0011] Preferably, the vibration motor further includes two baffles fixedly spaced in the housing, the two baffles are respectively arranged on opposite sides of the vibration unit, each baffle clamps and fixes the corresponding first fixing arm to the housing, and each elastic arm passes through the corresponding baffle.

[0012] Preferably, each baffle includes a baffle body spaced from the housing and two connecting portions respectively bent and extended from two ends of the baffle body, the two connecting portions are respectively fixed to opposite sides of the housing; the baffle body of each baffle clamps and fixes the corresponding first fixing arm to the housing.

[0013] Preferably, the vibration unit further includes a mass block, the mass block includes a mass block body, extension portions respectively extending away from the mass block body from opposite sides of the mass block body, and a clamping portion bent and extended from an end of the extension portion away from the mass block body, the clamping portion is spaced from the mass block body; the second fixing arm of each non-metallic elastic member is clamped and fixed between the corresponding clamping portion and the mass block body, and the elastic arms all pass through the corresponding clamping portion.

[0014] Preferably, the clamping portion is provided with a limiting groove penetrating therethrough, and a limiting portion extending towards the limiting groove of the corresponding clamping portion is provided at an end of the second fixing arm of each non-metallic elastic member close to the first fixing arm, and the limiting portion extends into the corresponding limiting groove.

[0015] Preferably, a receiving hole penetrating through the mass block body is provided, the driving assembly includes a coil fixed to the housing, and the vibration unit further includes a magnet fixed in the receiving hole and a magnetic conduction plate fixed to the side of the mass block body away from the coil. The magnet is stacked and fixed on the side of the magnetic conduction plate close to the coil, and the coil and the magnet are arranged at a relative interval.

[0016] Preferably, a receiving hole penetrating through the mass block body is provided, the driving assembly is inserted into the receiving hole, the driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit, the vibration unit further includes a magnet fixed in the receiving hole, the magnet and the driving assembly are arranged at a relative interval, the magnet includes two first magnets respectively arranged on the opposite sides of the driving assembly along the vibration direction of the vibration unit and two second magnets respectively arranged on the opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit, and a magnetic conduction plate is clamped between each second magnet and the mass block body.

[0017] Preferably, a receiving hole penetrating through the mass block body is provided, the driving assembly is inserted into the receiving hole, the driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit, the vibration unit further includes a magnet fixed in the receiving hole, the magnet and the driving assembly are arranged at a relative interval, the magnet includes two third magnets respectively arranged on the opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit, and a magnetic conduction plate is clamped between each third magnet and the mass block body.

[0018] Preferably, a receiving hole penetrating through the mass block body is provided, the driving assembly is inserted into the receiving hole, the driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit, the vibration unit further includes a magnet fixed in the receiving hole, the magnet and the driving assembly are arranged at a relative interval, the magnet includes two fourth magnets respectively arranged on the opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit, a magnetic conduction member is clamped between each fourth magnet and the mass block body, each magnetic conduction member includes a flat plate portion clamped between the corresponding fourth magnet and the mass block body and two bent portions bent and extended from the flat plate portion along the opposite sides of the vibration direction of the vibration unit, and each fourth magnet is arranged between the corresponding two bent portions.

[0019] Compared with the related art, the non-metallic elastic member of the vibration motor in the present utility model is made of a non-metallic material. The advantages of such a design are as follows: the amplitude of the vibration unit is not restricted. For example, when the amplitude of the vibration unit is greater than 1 mm and in an environment with 65% relative humidity and 95 °C, the non-metallic elastic member still has good stability; the non-metallic elastic member does not limit the designed thickness of the vibration motor, enabling the vibration motor to be designed thinner; the non-metallic elastic member can be made by injection molding, with higher designability of its shape and greater room for play. For example, a non-metallic elastic member with a complex shape can be designed according to actual needs; the non-metallic elastic member can be directly connected to the vibration unit and the housing, avoiding the risk of welding failure of the elastic member made of metal and eliminating the need to use a solder pad to press for positioning. The assembly process is simple and cost-saving; the non-metallic elastic member also has a damping effect by itself, eliminating the need for an additional damping step for the vibration motor and reducing the risk of damping weakening in an environment with 65% relative humidity and 95 °C, stabilizing the stroke of the vibration motor in this environment, thereby ensuring the service life of the vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0021] Figure 1 is a three-dimensional structural schematic diagram of the first vibration motor provided by the embodiment of the present utility model;

[0022] Figure 2 is an overall structural exploded schematic diagram of the first vibration motor provided by the embodiment of the present utility model;

[0023] Figure 3 is a partial structural exploded schematic diagram of the first vibration motor provided by the embodiment of the present utility model;

[0024] Figure 4 is along Figure 1 the sectional view taken along line A-A in

[0025] Figure 5 is a partial structural exploded schematic diagram of the second vibration motor provided by the embodiment of the present utility model;

[0026] Figure 6 is a partial structural exploded schematic diagram of the third vibration motor provided by the embodiment of the present utility model;

[0027] Figure 7Schematic three-dimensional structure diagram of the fourth vibration motor provided by the embodiment of the present utility model;

[0028] Figure 8 Partial structure decomposition diagram of the fourth vibration motor provided by the embodiment of the present utility model;

[0029] Figure 9 Along Figure 7 Cross-sectional view taken along line B-B in

[0030] Wherein, 100, vibration motor; 1, housing; 11, bottom plate; 12, side plate; 13, cover plate; 2, vibration unit; 21, magnet; 21a, first magnet; 21b, second magnet; 21c, third magnet; 21d, fourth magnet; 22, mass block; 221, mass block body; 222, extension; 223, clamping part; 2231, limiting groove; 23, magnetic conduction plate; 231, flat part; 232, bending part; 3, non-metallic elastic part; 31, first fixed arm; 32, second fixed arm; 321, limiting part; 33, elastic arm; 4, driving component; 41, iron core; 42, coil; 5, retaining piece; 51, retaining piece body; 52, connecting part. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Embodiment 1

[0033] The embodiment of the present utility model provides a vibration motor 100. As shown in Figures 1 to 4 , it includes a housing 1 having a receiving space, a vibration unit 2 received in the receiving space, a non-metallic elastic part 3 fixed in the housing 1, and a driving component 4 received in the housing 1 and driving the vibration unit 2 to vibrate. The non-metallic elastic part 3 elastically suspends the vibration unit 2 in the receiving space.

[0034] Wherein, the vibration motor 100 is rectangular. Correspondingly, both the housing 1 and the vibration unit 2 are rectangular.

[0035] The housing 1 includes a bottom plate 11, side plates 12 bent and extended from the periphery of the bottom plate 11, and a cover plate 13 covering the side plates 12. The bottom plate 11, the side plates 12, and the cover plate 13 jointly enclose to form the receiving space; the non-metallic elastic part 3 is fixed to the side plates 12 and is spaced from the bottom plate 11 and the cover plate 13 respectively.

[0036] Specifically, the vibration unit 2 is one of the magnet and the coil, and the driving assembly 4 is the other of the magnet and the coil; the vibration unit 2 and the driving assembly 4 are arranged at intervals. Among them, the magnet can be directly fixed or indirectly fixed through an intermediate medium, and the coil can also be directly fixed or indirectly fixed through an intermediate medium.

[0037] Specifically, the non-metallic elastic member 3 is any one of a silica gel elastic member, a plastic elastic member, and a resin elastic member; there are two non-metallic elastic members 3, which are respectively arranged on opposite sides of the vibration unit 2 along the vibration direction of the vibration unit 2; each non-metallic elastic member 3 includes a first fixing arm 31 fixed to the housing 1, a second fixing arm 32 fixed to the vibration unit 2, and an elastic arm 33 connecting the first fixing arm 31 and the second fixing arm 32. Such a design can better fix the non-metallic elastic member 3 to the housing 1 and the vibration unit 2, and at the same time increase the elasticity of the non-metallic elastic member 3.

[0038] Among them, the first fixing arm 31 is fixed to the side plate 12 of the housing. Each elastic arm 33 of each non-metallic elastic member 3 includes two and is arranged opposite to each other at intervals, and such a design can increase the stability of the elastic arm 33.

[0039] Specifically, the vibration motor 100 further includes two baffles 5 fixedly arranged at intervals inside the housing 1. The two baffles 5 are respectively arranged on opposite sides of the vibration unit 2. Each baffle 5 clamps and fixes the corresponding first fixing arm 31 to the housing 1, and each elastic arm 33 passes through the corresponding baffle 5 and extends in the direction of the second fixing arm 32. Such a design can limit the non-metallic elastic member 3 and avoid the risk of the non-metallic elastic member 3 falling off the housing 1.

[0040] Among them, the baffle 51 is arranged at an interval from the bottom plate 11; each baffle 5 includes a baffle body 51 arranged at an interval from the housing 1 and two connecting parts 52 respectively bent and extended from both ends of the baffle body 51. The two connecting parts 52 are respectively fixed to opposite sides of the housing 1; the baffle body 51 of each baffle 5 clamps and fixes the corresponding first fixing arm 31 to the housing 1. Such a design can increase the stability of the connection between the baffle 5 and the housing 1 to better limit the non-metallic elastic member 3.

[0041] The two connecting parts 52 of each baffle 5 are respectively fixed to opposite sides of the side plate 12, that is, the baffle body 51 of each baffle 5 clamps and fixes the first fixing arm 31 of the corresponding non-metallic elastic member 3 to one side of the side plate 12.

[0042] Specifically, the mass block 22 includes a mass block body 221, extension portions 222 extending away from the mass block body 221 respectively from opposite sides of the mass block body 221, and a clamping portion 223 formed by bending and extending from one end of the extension portion 222 away from the mass block body 21. The clamping portion 223 is spaced from the mass block body 221; the second fixing arm 32 of each non-metallic elastic member 3 is clamped and fixed between the corresponding clamping portion 223 and the mass block body 221, and the elastic arm 33 passes through the corresponding clamping portion 223 and is connected to the second fixing arm 32. Such a design can limit the non-metallic elastic member 3 and avoid the risk of the non-metallic elastic member 3 falling off the mass block 22.

[0043] Among them, the clamping portion 223 is provided with a limiting groove 2231 penetrating therethrough. One end of the second fixing arm 32 of each non-metallic elastic member 3 close to the first fixing arm 31 is provided with a limiting portion 321 extending towards the limiting groove 2231 of the corresponding clamping portion 223, and the limiting portion 321 extends into the corresponding limiting groove 2231. Such a design can better limit the non-metallic elastic member 3.

[0044] In this embodiment, the mass block 22 is rectangular. The mass block body 221 is provided with a receiving hole penetrating therethrough. The driving assembly 4 is inserted into the receiving hole. The driving assembly 4 includes an iron core 41 fixed to the housing 1 and a coil 42 wound around the iron core 41 along the vibration direction of the vibration unit 2. The vibration unit 2 further includes a magnet 21 fixed in the receiving hole. The magnet 21 is spaced from the driving assembly 4. The magnet 21 includes two third magnets 21c disposed on opposite sides of the driving assembly 4 perpendicular to the vibration direction of the vibration unit 2. A magnetic conduction plate 23 is interposed between each third magnet 21c and the mass block body 221. Among them, the iron core 41 is fixed to the bottom plate 11 of the housing 1.

[0045] Compared with the related art, in the present utility model, the non-metallic elastic member 3 of the vibration motor 100 is made of a non-metallic material. The advantages of such a design are as follows: the amplitude of the vibration unit 2 is not restricted. For example, when the amplitude of the vibration unit 2 is greater than 1 mm and in an environment with 65% relative humidity and 95 °C, the non-metallic elastic member 3 still has good stability; the non-metallic elastic member 3 does not limit the designed thickness of the vibration motor 100, enabling the vibration motor 100 to be designed thinner; the non-metallic elastic member 3 can be made by injection molding, with higher designability of its shape and greater room for play. For example, a non-metallic elastic member 3 with a complex shape can be designed according to actual needs; the non-metallic elastic member 3 can be directly connected to the vibration unit 2 and the housing 1, avoiding the risk of welding failure of the non-metallic elastic member 3 made of metal, and there is no need to use a solder pad to press and limit the position. The assembly process is simple and cost-saving; the non-metallic elastic member 3 also has a damping effect by itself, avoiding the need for an additional damping step for the vibration motor 100, reducing the risk of damping weakening of the additional damping in an environment with 65% relative humidity and 95 °C, and stabilizing the stroke of the vibration motor 100 in this environment, thereby ensuring the service life of the vibration motor 100.

[0046] Embodiment Two

[0047] Combined with Figure 5 As shown, the difference between this embodiment and the above Embodiment One is that the magnetic steel 21 includes two first magnetic steels 21a respectively disposed on opposite sides of the driving assembly 4 along the vibration direction of the vibration unit 2 and two second magnetic steels 21b respectively disposed on opposite sides of the driving assembly 4 perpendicular to the vibration direction of the vibration unit 2. A magnetic conductive plate 23 is interposed between each second magnetic steel 21b and the mass block body.

[0048] Meanwhile, inwardly recessed grooves are respectively provided on the inner side of the mass block body 221 corresponding to the positions of the first magnetic steel 21a and the second magnetic steel 21b, and the first magnetic steel 21a and the second magnetic steel 22b are respectively fixed in the corresponding grooves.

[0049] Embodiment Three

[0050] Combined with Figure 6 As shown, the difference between this embodiment and the above Embodiment One is that the magnetic steel 21 includes two fourth magnetic steels 21d respectively disposed on opposite sides of the driving assembly 4 perpendicular to the vibration direction of the vibration unit 2. A magnetic conductive member 23 is interposed between each fourth magnetic steel 21d and the mass block body 221. Each magnetic conductive member 23 includes a flat plate portion 231 interposed between the corresponding fourth magnetic steel 21d and the mass block body 221 and two bent portions 232 bent and extending from the flat plate portion 231 along opposite sides of the vibration direction of the vibration unit 2. Each fourth magnetic steel 21d is disposed between the corresponding two bent portions 232.

[0051] Embodiment Four

[0052] Combined body Figures 7 to 9 As shown, different from the above-mentioned first embodiment, in this embodiment, the driving component 4 does not have an iron core 41, and the coil 42 is directly fixed to the bottom plate 11 of the housing 1; the vibration unit 2 further includes a magnetic steel 21 fixed in the receiving hole and a magnetic conductive plate 23 fixed on the side of the mass body 221 away from the coil 42. The magnetic steel 21 is stacked and fixed on the side of the magnetic conductive plate 23 close to the coil 42, and the coil 42 and the magnetic steel 21 are arranged at a relative interval.

[0053] In this embodiment, there are three magnetic steels 21, which are arranged in sequence from one side of the mass body 221 to the opposite side.

[0054] The above are only the implementation manners of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A vibration motor, characterized in that, The vibration motor includes a housing having a receiving space, a vibration unit received in the receiving space, a non-metallic elastic member fixed in the housing, and a driving assembly received in the housing and driving the vibration unit to vibrate. The elastic member elastically suspends the vibration unit in the receiving space.

2. The vibration motor according to claim 1, characterized in that The non-metallic elastic member is any one of a silica gel elastic member, a plastic elastic member, and a resin elastic member.

3. The vibrating motor according to claim 1, wherein, There are two non-metallic elastic members, which are respectively arranged on opposite sides of the vibration unit along the vibration direction of the vibration unit; each non-metallic elastic member includes a first fixed arm fixed to the housing, a second fixed arm fixed to the vibration unit, and an elastic arm connecting the first fixed arm and the second fixed arm.

4. The vibrating motor according to claim 3, wherein The vibration motor further includes two baffles fixedly spaced in the housing, the two baffles are respectively arranged on opposite sides of the vibration unit, and each baffle clamps and fixes the corresponding first fixed arm to the housing, and the elastic arm passes through the corresponding baffle.

5. The vibrating motor according to claim 4, wherein Each baffle includes a baffle body spaced from the housing and two connecting portions respectively bent and extended from both ends of the baffle body, and the two connecting portions are respectively fixed to opposite sides of the housing; the baffle body of each baffle clamps and fixes the corresponding first fixed arm to the housing.

6. The vibrating motor according to claim 3, wherein The vibration unit further includes a mass block, the mass block includes a mass block body, extension portions respectively extending from opposite sides of the mass block body in a direction away from the mass block body, and a clamping portion bent and extended from one end of the extension portion away from the mass block body, the clamping portion is spaced from the mass block body; the second fixed arm of each non-metallic elastic member is clamped and fixed between the corresponding clamping portion and the mass block body, and the elastic arm passes through the corresponding clamping portion.

7. The vibration motor according to claim 6, characterized in that, The clamping portion is provided with a limiting groove penetrating therethrough, and one end of the second fixed arm of each non-metallic elastic member close to the first fixed arm is provided with a limiting portion extending towards the limiting groove of the corresponding clamping portion, and the limiting portion extends into the corresponding limiting groove.

8. The vibration motor according to claim 6, characterized in that, The mass block body is provided with a receiving hole penetrating therethrough, the driving assembly includes a coil fixed to the housing, the vibration unit further includes a magnetic steel fixed in the receiving hole and a magnetic conduction plate fixed on the side of the mass block body away from the coil, the magnetic steel is stacked and fixed on the side of the magnetic conduction plate close to the coil, and the coil is spaced relatively from the magnetic steel.

9. The vibration motor according to claim 6, wherein The mass block body is provided with a receiving hole penetrating therethrough, and the driving assembly is inserted into the receiving hole. The driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit. The vibration unit further includes a permanent magnet fixed in the receiving hole. The permanent magnet is disposed at a relative interval from the driving assembly. The permanent magnet includes two first permanent magnets respectively disposed on opposite sides of the driving assembly along the vibration direction of the vibration unit and two second permanent magnets respectively disposed on opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit. A magnetic conduction plate is interposed between each second permanent magnet and the mass block body.

10. The vibration motor according to claim 6, characterized in that, The mass block body is provided with a receiving hole penetrating therethrough, and the driving assembly is inserted into the receiving hole. The driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit. The vibration unit further includes a permanent magnet fixed in the receiving hole. The permanent magnet is disposed at a relative interval from the driving assembly. The permanent magnet includes two third permanent magnets respectively disposed on opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit. A magnetic conduction plate is interposed between each third permanent magnet and the mass block body.

11. The vibrating motor according to claim 6, wherein, The mass block body is provided with a receiving hole penetrating therethrough, and the driving assembly is inserted into the receiving hole. The driving assembly includes an iron core fixed to the housing and a coil wound around the iron core along the vibration direction of the vibration unit. The vibration unit further includes a permanent magnet fixed in the receiving hole. The permanent magnet is disposed at a relative interval from the driving assembly. The permanent magnet includes two fourth permanent magnets respectively disposed on opposite sides of the driving assembly perpendicular to the vibration direction of the vibration unit. A magnetic conduction member is interposed between each fourth permanent magnet and the mass block body. Each magnetic conduction member includes a flat plate portion interposed between the corresponding fourth permanent magnet and the mass block body and two bent portions bent and extended from the flat plate portion along opposite sides of the vibration direction of the vibration unit. Each fourth permanent magnet is disposed between the corresponding two bent portions.

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