CN205583985U - Linear vibrating motor - Google Patents
Linear vibrating motor Download PDFInfo
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- CN205583985U CN205583985U CN201620117411.3U CN201620117411U CN205583985U CN 205583985 U CN205583985 U CN 205583985U CN 201620117411 U CN201620117411 U CN 201620117411U CN 205583985 U CN205583985 U CN 205583985U
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- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The utility model provides a linear vibrating motor, including shell, oscillator and fix on the shell and with oscillator parallel arrangement's stator, the oscillator includes the quality piece and inlays the vibrating mass who establishes at quality piece middle part that include the permanent magnet, wherein, border on respectively at vibrating mass's both ends and have push -pull structure, push -pull structure is including inlaying the magnet of establishing in the quality piece of recommending to and fix on the shell and recommend the coil, recommend the interact power that produces reinforcing magnetic field between magnet and the adjacent permanent magnet, recommend the coil and produce the traction thrust on the horizontal direction with recommending magnet after the circular telegram, for the oscillator along providing initial drive force with the stator place parallel ascending reciprocating motion in side in plane, recommend magnet and be three at least, the orientation that magnetizes of recommending magnet is on a parallel with direction of vibration and perpendicular to direction of vibration respectively. Utilize above -mentioned utility model can make full use of to recommend the magnetic field of coil, the reinforcing traction thrust realizes that magnetic field is multiplexing to design for the shell fragment provides more abundant space.
Description
Technical Field
The utility model relates to a consumer electronics technical field, more specifically relates to a be applied to portable consumer electronics's linear vibration motor.
Background
With the development of communication technology, portable electronic products, such as mobile phones, handheld game consoles or handheld multimedia entertainment devices, have come into the lives of people. In these portable electronic products, a micro vibration motor is generally used for system feedback, such as incoming call prompt of a mobile phone, vibration feedback of a game machine, and the like. However, with the trend of electronic products being lighter and thinner, various components inside the electronic products also need to adapt to the trend, and micro vibration motors are no exception.
An existing micro vibration motor generally includes an upper cover, a lower cover forming a vibration space with the upper cover, a vibrator (including a weight block and a permanent magnet) performing linear reciprocating vibration in the vibration space, an elastic support member connecting the upper cover and making the vibrator perform reciprocating vibration, and a coil located a distance below the vibrator.
In the micro vibration motor with the structure, the force for driving the vibrator to vibrate is completely derived from the magnetic field force between the vibrator and the coil, the vibration sense of the vibrator vibration is small due to the limited magnetic field force between the vibrator and the coil, and the stress of the vibrator is changed due to the change of the position of the vibrator relative to the position of the coil in the vibration process of the vibrator, so that the linear vibration response speed is not uniform, the vibration of the vibrator generates nonlinear change, and the vibration sense balance of an electronic product is influenced.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the present invention provides a linear vibration motor, which utilizes a push-pull structure to provide an initial driving force for the vibration of a vibrator, so as to push the vibrator to reciprocate in a direction parallel to the plane of a stator, and by changing the position of the push-pull structure design in the prior art, not only can the multiplexing of a magnetic field be realized, the push-pull force is enhanced, but also a larger design space can be avoided for the elastic supporting members at the two ends of a mass block.
According to the utility model provides a linear vibration motor, including shell, oscillator and fix on shell and with the stator of oscillator parallel arrangement, the oscillator includes the quality piece and inlays the vibrating mass who establishes in the middle part of the quality piece, the vibrating mass includes the permanent magnet; wherein, two ends of the vibrating block are respectively adjoined with a push-pull structure; the push-pull structure comprises a push-pull magnet embedded in the mass block and a push-pull coil fixed on the shell; the mutual acting force for enhancing the magnetic field is generated between the push-pull magnet and the adjacent permanent magnet; after being electrified, the push-pull coil and the push-pull magnet generate push-pull force in the horizontal direction, and the push-pull force is provided for the vibrator to reciprocate in the direction parallel to the plane of the stator; the push-pull magnet has at least three push-pull magnets, and the magnetizing directions of the push-pull magnets are respectively parallel to the vibration direction and perpendicular to the vibration direction.
The driving stator comprises a magnetic conduction block, the magnetic conduction block is arranged opposite to the vibrator and fixed on the shell, and the magnetic conduction block is under the action of a magnetic field force in the same direction as and/or opposite to the vibration direction of the vibrator.
The push-pull magnet comprises a horizontally magnetized central magnet and edge magnets positioned on two sides of the central magnet, wherein each edge magnet comprises two vertically arranged magnets and a magnetic yoke positioned between the two magnets; wherein, the direction of magnetization of center magnet and limit magnet is perpendicular.
Wherein, the preferred scheme is that the center magnet is horizontally magnetized, and the side magnets are vertically magnetized.
Preferably, the push-pull coils are arranged on the upper side and the lower side of the push-pull magnet in parallel, and the winding direction of the push-pull coils is parallel to the magnetizing direction of the central magnet.
Preferably, the vibrating mass comprises at least two permanent magnets which are adjacently arranged, and the adjacent ends of the permanent magnets have the same polarity.
The mass block is provided with a groove for accommodating the vibrating block, and two push-pull magnet accommodating grooves are symmetrically arranged at two adjacent ends of the groove; the push-pull magnet is embedded in the push-pull magnet accommodating groove.
Wherein, the preferable proposal is that when the vibrator is in a balanced state, the resultant force of the magnetic field force of the vibrator received by the magnetic conduction block is zero; when the magnetic conduction block is acted by a push-pull force generated by the push-pull structure and is subjected to relative displacement with the vibrator in the vibration direction of the vibrator, the resultant force direction of the magnetic field force of the vibrator, which is received by the magnetic conduction block, is the same as the direction of the relative displacement, and the magnitude of the resultant force of the magnetic field force of the vibrator, which is received by the magnetic conduction block, is in direct proportion to the magnitude of the relative displacement.
The vibrating block comprises a first permanent magnet, a second permanent magnet and a third permanent magnet which are sequentially arranged in an adjacent mode, and the magnetic conducting blocks are symmetrically located on the upper side and the lower side of the second permanent magnet.
The preferred scheme is that an avoiding structure corresponding to the push-pull coil and the magnetic conduction block is arranged in the middle of the mass block.
The linear vibration motor according to the present invention, which is out of the existing motor design concept that only the magnetic field force of the vibrator and the coil provides the driving force, utilizes the push-pull structure to provide an initial driving force for the vibration of the vibrator, and pushes the vibrator to reciprocate in the direction parallel to the plane of the stator; additionally, the utility model discloses in, adopt the neighbouring mode that sets up of push-pull structure and vibrating mass, not only can realize the multiplexing in the produced magnetic field of permanent magnet of oscillator, strengthen linear vibrating motor's the sense of shaking, can also avoid out more spaces for elastic support piece's the relation.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is an exploded view schematically illustrating a linear vibration motor according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a linear vibration motor according to an embodiment of the present invention;
fig. 3-1 is a schematic view of a linear vibration motor according to an embodiment of the present invention;
fig. 3-2 is a schematic diagram of a linear vibration motor according to an embodiment of the present invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
As used in the description of the embodiments below, the "mass" may also be referred to as a "counterweight", and refers to a high quality, high density metal mass that is secured to a vibrating mass that generates vibrations to enhance the vibration balance.
In addition, the utility model discloses mainly used micro-vibration motor's improvement, nevertheless do not exclude to be applied to large-scale vibration motor with the technique in the utility model. However, for convenience of description, in the following description of the embodiments, "linear vibration motor" and "micro vibration motor" are denoted as the same meaning.
For the purpose of describing the structure of the linear vibration motor of the present invention in detail, the following description will discuss specific embodiments of the present invention in detail with reference to the accompanying drawings.
In order to solve the unbalanced problem of the sense of vibration that causes because the drive power that the magnet of oscillator and stator coil provided is unbalanced in the current miniature vibrating motor structure, the utility model provides a linear vibrating motor to the stator coil is replaced to the magnetic conduction piece, has overcome the stator coil because the unbalanced problem of atress that the change of circular telegram direction and electric current size unstability lead to, through the magnetic field of the produced magnetic field reinforcing push-pull structure of vibrating mass, realizes the magnetic field multiplexing of linear vibrating motor drive part, in addition, also can avoid out more spaces for elastic support piece's design.
Fig. 1 shows an exploded structure of a linear vibration motor according to an embodiment of the present invention; fig. 2 shows a sectional structure of a linear vibration motor according to an embodiment of the present invention; fig. 3-1 illustrates the principle of a linear vibration motor according to an embodiment of the present invention.
As shown in fig. 1 to 3-1, the linear vibration motor according to the embodiment of the present invention includes a housing (including an upper case 1 having a rectangular parallelepiped structure and a lower case 11 having a plate structure and fixed to the upper case 1 in an adaptive manner), a vibrator and a stator fixed to the housing and arranged in parallel to the vibrator, wherein the vibrator includes a mass block 9 and a vibration block embedded in the middle of the mass block 9, and the vibration block includes at least one permanent magnet; the two ends of the vibrating block are respectively adjoined with a push-pull structure, the push-pull structure comprises a push-pull magnet embedded in the mass block and a push-pull coil fixed on the shell, and push-pull force is provided for the vibration of the vibrator through the cooperation of the push-pull magnet and the push-pull coil; the magnetizing directions of the push-pull magnets are respectively parallel to the vibration direction and perpendicular to the vibration direction, interaction force for enhancing a magnetic field can be generated between the push-pull magnets and the adjacent permanent magnets, namely the magnetic field generated by the permanent magnets can also act on the push-pull structure, and therefore magnetic field multiplexing of the linear vibration motor driving part is achieved.
Specifically, the push-pull magnet comprises a horizontally magnetized central magnet and side magnets positioned on two sides of the central magnet, wherein each side magnet comprises two vertically arranged magnets and a magnetic yoke positioned between the two magnets; wherein, the direction of magnetization of center magnet and limit magnet is perpendicular. Wherein, the central magnet is horizontally magnetized, and the side magnets are vertically magnetized; or the central magnet is vertically magnetized, and the side magnets are horizontally magnetized. The push-pull coils are arranged on the upper side and the lower side of the push-pull magnet in parallel, and the winding direction of the push-pull coils is parallel to the magnetizing direction of the central magnet.
In addition, the push-pull structure is arranged at two ends of the vibrating block in an abutting mode, more space can be avoided for the design of the elastic supporting pieces at two ends of the vibrating block, and the structure is more reasonable. After being electrified, the push-pull coil and the push-pull magnet generate push-pull force in the horizontal direction, initial driving force is provided for the vibrator to reciprocate in the direction parallel to the plane of the stator, and the push-pull force can be enhanced due to the interaction of a magnetic field generated by the permanent magnet and the push-pull structure, so that the vibration sense of the linear vibration motor is enhanced.
Specifically, fig. 3-2 illustrate principle two of a linear vibration motor according to an embodiment of the present invention.
As shown in fig. 3-2, since the width d1 of the mass block is smaller than d2, the push-pull structure is disposed at two adjacent sides of the vibrating mass, and the elastic supporting members are disposed at two ends of the mass block, so that a sufficient space can be reserved for the design of the elastic supporting members, the interaction force between the magnetic field of the vibrating mass and the push-pull coil can be realized, the magnetic field generated by the permanent magnet can be reused, the structure is more optimized, and the vibration effect of the linear vibration motor is more remarkable.
In an embodiment of the present invention, at least a pair of push-pull magnet fixing slots are symmetrically disposed on the mass block, at least three push-pull magnets are accommodated in each push-pull magnet fixing slot, and the magnetization directions of the push-pull magnets disposed adjacently are perpendicular to each other.
Specifically, as shown in fig. 1 to 3-1, a pair of (two) push-pull magnet fixing slots are symmetrically disposed on the mass block, that is, two push-pull magnet fixing slots are disposed on two sides of the vibrating block, respectively, three push-pull magnets are accommodated in each push-pull magnet fixing slot, push-pull coils corresponding to the push-pull magnets are fixed on the housing, and the push-pull coils are located on the upper and lower sides of the corresponding push-pull magnets.
The push-pull magnets positioned on one side adjacent to the vibrating block comprise push-pull magnets 5a and 5a 'and push-pull magnets 5d and 5 d' positioned in push-pull magnet fixing grooves, and a central magnet 5e positioned between the push-pull magnets 5a and 5a 'and the push-pull magnets 5d and 5 d', wherein the push-pull magnets 5a and 5a 'and the push-pull magnets 5d and 5 d' are equivalent to side magnets, the side magnets 5a and 5a 'are vertically distributed, a magnetic guide yoke 6a is arranged between the side magnets and the push-pull magnets, and the adjacent ends of the side magnets 5a and 5 a' have the same polarity. The center magnet 5e has a magnetization direction perpendicular to the magnetization directions of the side magnets 5a, 5a ', 5 d'.
In addition, the polarity of the abutment ends of the side magnets 5a, 5a 'is opposite to that of the corresponding abutment end of the central magnet, and the polarity of the abutment ends of the side magnets 5d, 5 d' is opposite to that of the corresponding abutment end of the central magnet. That is, the side magnets 5a, 5a 'have the magnetization direction of N-S-N in the vertical direction, the center magnet has the magnetization direction of N-S in the horizontal direction, and the side magnets 5d, 5 d' have the magnetization direction of-S-N-N S in the vertical direction.
Push-pull coils 2a are arranged on the upper sides of the push-pull magnets 5a and 5d, the push-pull coils are fixed on the shell and are arranged in parallel with the push-pull magnets, and the winding directions of the push-pull coils are perpendicular to the magnetizing directions of the corresponding push-pull magnets. Push-pull coils 2a ' are provided on the lower sides of the push-pull magnets 5a ', 5d ' and fixed to the housing and arranged in parallel with the respective push-pull magnets, the winding direction of the push-pull coils being perpendicular to the magnetizing direction of the push-pull magnets, and the winding direction of the push-pull coils being parallel to the magnetizing direction of the center magnet.
Similarly, the push-pull magnet located on the other side of the adjacent vibrating mass includes push-pull magnets 5b, 5b ', push-pull magnets 5c, 5 c', a center magnet 5e 'is provided between the push-pull magnets 5b, 5 b' and the push-pull magnets 5c, 5c ', a push-pull coil 2b is provided on the upper side of the push-pull magnets 5b, 5c, and a push-pull coil 2 b' is provided on the lower side of the push-pull coils 5b ', 5 c'. The magnetizing directions and the positions between the push-pull magnets 5b, 5b ', 5c ' and the central magnet 5e ' are similar to those of the push-pull magnets 5a, 5a ', 5d ' and the central magnet 5e, and are not described herein again.
Therefore, in the vibrating process of the vibrating block, the mutual acting force for enhancing the magnetic field can be generated between the push-pull magnet and the adjacent permanent magnet, namely, the magnetic field generated by the permanent magnet can also act on the push-pull structure, so that the magnetic field multiplexing of the driving part of the linear vibrating motor is realized, and the push-pull strength of the push-pull structure is enhanced.
In another embodiment of the present invention, the stator includes magnetic conductive blocks 3a and 3b fixed on the housing, and the magnetic conductive blocks 3a and 3b are acted by two magnetic forces in the same and/or opposite directions in the vibration direction of the vibrator; when the vibrator is in a balanced state, the resultant force of the two magnetic field forces is zero; when the magnetic conductive blocks 3a and 3b are acted by the push-pull force generated by the push-pull structure, namely the initial driving force, and the vibrator is relatively displaced in the vibration direction of the vibrator, the resultant force direction of the two magnetic field forces is the same as the relative displacement direction, and the magnitude of the resultant force of the two magnetic field forces is in direct proportion to the magnitude of the relative displacement.
The vibrating block comprises three permanent magnets which are adjacently arranged and magnetized in the vertical direction, the adjacent ends of the adjacent permanent magnets are opposite in polarity, the magnetic conducting block is of a sheet structure, is arranged on the upper side and the lower side of the permanent magnet in the middle of the central vibrating block and is symmetrical relative to the center of the central vibrating block.
The vibrating block comprises a first permanent magnet 7a, a second permanent magnet 7b and a third permanent magnet 7c which are sequentially arranged, a first magnetic conducting yoke 8a is arranged between the first permanent magnet 7a and the second permanent magnet 7b, a second magnetic conducting yoke 8b is arranged between the second permanent magnet 7b and the third permanent magnet 7c, a first magnetic conducting block 3a is arranged on the upper side of the second permanent magnet 7b, a second magnetic conducting block 3b is arranged on the lower side of the second permanent magnet 7b, the first magnetic conducting block 3a and the second magnetic conducting block 3b are both fixed on the shell, and a certain gap exists between the first magnetic conducting block 3a and the second permanent magnet 7 b. The first magnetic conduction block 3a and the second magnetic conduction block 3b are symmetrically distributed relative to the second permanent magnet 7b, and when the oscillator is in a balanced static state, the distances between the first magnetic conduction block 3a and the second magnetic conduction block 3b and the end parts of the first permanent magnet 7a and the third permanent magnet 7c are the same.
It should be noted that the magnetic conductive blocks may also be symmetrically or asymmetrically distributed on the upper and lower sides of the vibrating block, and the latter arranges the magnetic conductive blocks on one side of the vibrating block. For example, the vibrating mass comprises three adjacent permanent magnets; the three adjacent permanent magnets are magnetized in the vertical direction, and the adjacent ends of the adjacent permanent magnets are opposite in polarity; and the two magnetic conduction blocks are symmetrically arranged on the upper side and the lower side of the vibrating block and correspond to the permanent magnets in the middle of the vibrating block.
Or the vibrating block comprises a permanent magnet, two magnetic conduction blocks are arranged, and the two magnetic conduction blocks are both positioned on the upper side or the lower side of the vibrating block; or the two magnetic conduction blocks are distributed corresponding to the left end and the right end of the permanent magnet respectively and are symmetrical about the central axis of the permanent magnet.
Or the vibrating block comprises three permanent magnets which are adjacently arranged, the three adjacent permanent magnets are magnetized in the vertical direction, the adjacent ends of the adjacent permanent magnets are opposite in polarity, the six magnetic conduction blocks are respectively and symmetrically arranged on the upper side and the lower side of the three adjacent permanent magnets.
The vibrating block comprises three permanent magnets which are adjacently arranged, the three adjacent permanent magnets are magnetized in the vertical direction, and the adjacent ends of the adjacent permanent magnets are opposite in polarity; the two magnetic conduction blocks are asymmetrically arranged on the upper side and the lower side of the vibrating block; and the magnetic conduction blocks which are asymmetrically arranged at the upper side and the lower side of the vibrating block are symmetrical about the center of the vibrating block.
When the vibrator is in a balanced state, the first magnetic conduction block 3a is subjected to two magnetic field forces F1 and F2 which have the same size and opposite directions; when the first magnetic conductive block 3a undergoes a relative displacement d to the right from the vibrator in the vibration direction of the vibrator (including the permanent magnets 7a, 7b, 7c and the magnetic conductive yokes 8a, 8b disposed between the adjacently disposed permanent magnets), the magnetic force F1 received by the first magnetic conductive block 3a is smaller than F2, that is, when the displacement of the first magnetic conductive block 3a (the displacement is the relative displacement with the permanent magnets because the magnetic conductive blocks are fixed to the housing) varies as d, the magnetic force dF received by the first magnetic conductive block 3a is F2-F1 is Kd >0, where K is the proportionality coefficient of the magnetic force received by the magnetic conductive blocks, and K is related to the sizes of the magnetic conductive blocks, the permanent magnets and the positions therebetween. Similarly, the second magnetic conduction block 3b receives a magnetic force dF of F4-F3 Kd >0, and the first magnetic conduction block 3a and the second magnetic conduction block 3b together drive the vibrating block to vibrate in a direction parallel to the magnetic conduction blocks.
Therefore, when the magnetic conduction block is displaced relative to the vibrator in the vibration direction of the vibrator, the resultant force direction of the two magnetic field forces is the same as the relative displacement direction of the magnetic conduction block, and the magnitude of the resultant force of the two magnetic field forces is in a direct proportional relation with the magnitude of the relative displacement, so that the inverse stiffness change of the magnetic conduction block is realized, the vibrator is ensured to generate resonance, and the vibration effect is more remarkable.
The utility model discloses an among the embodiment, for increasing the magnetic strength of push-pull structure, improve the vibration range of oscillator, be provided with three (six) and the vibrating mass and adjoin the push-pull structure fixed slot that sets up, in every push-pull structure fixed slot, be provided with one or two push-pull magnet respectively and be located the magnetic yoke between two push-pull magnet. The push-pull magnets are both vertical magnetized and horizontal magnetized in a mixed mode.
The utility model discloses at specific in-process of using, also can increase/reduce the group number of push-pull magnet according to the product needs of reality, for example, adopt and exceed three and more push-pull magnet group numbers to set up corresponding push-pull coil on every two sets of or every group push-pull magnet, with the push-pull power of reinforcing push-pull structure, reinforcing linear vibrating motor's the sense of vibration.
In another embodiment of the present invention, a magnetic liquid may be filled between the push-pull coil and the adjacent push-pull magnet. The magnetic gap is formed between the push-pull magnet and the push-pull coil, a flexible magnetic conductive member is filled in the magnetic gap, the flexible magnetic conductive member can be magnetic liquid, the magnetic liquid is a colloidal substance with magnetism, and mainly means that a surface active agent with long chains coated on the outer layer of nanoscale magnetic particles (nickel, cobalt, iron oxide and the like) is uniformly dispersed in base liquid such as water, organic solvent, oil and the like, so that a uniform and stable colloidal solution is formed.
Because the magnetic fluid has certain magnetism, during the assembly, can be earlier in the corresponding push-pull structure fixed slot that sets up of push-pull structure, then squeeze into the magnetic fluid in the magnetic gap between push-pull magnet and the push-pull coil, because self magnetism magnetic fluid can initiatively adsorb in the surface of push-pull magnet, can strengthen the magnetic strength between push-pull magnet and the push-pull coil through the magnetic fluid, provide stronger push-pull power for the vibrating mass.
It should be noted that, in each of the above embodiments, an avoiding structure corresponding to the push-pull coil and the magnetic conductive block is disposed in the middle of the mass block, a groove for accommodating the vibrating block is disposed in the mass block, and the vibrating block is fixed in the groove in a glue-coated manner.
In addition, the push-pull coil can be arranged on one side of the push-pull magnet or symmetrically arranged on the upper side and the lower side of the push-pull magnet, the push-pull magnet in one push-pull magnet fixing groove can be flexibly set as well as the number and the position of the push-pull coil according to the needs of products, for example, one or more push-pull coils are arranged, the structure of the push-pull magnet is not limited to the two pairs of structures shown in the drawing, the push-pull coil can also be arranged on one side of the push-pull magnet, or the push-pull coils are asymmetrically arranged on the upper side and the lower side of the push-pull magnet, and the two sides of the groove of the fixed vibrating block are respectively provided with a group of push-pull magnets and push-.
The linear vibration motor of the present invention further includes a Flexible printed circuit Board (PFCB) 4 and an elastic support member 10; wherein, the flexible circuit board 4 is fixedly connected with the shell; and the push-pull coil is communicated with an external circuit through a circuit on the flexible circuit board 4. Elastic support members 10 are respectively arranged at the left end and the right end of the mass block 9, the push-pull structure is arranged between the elastic support members 10 and the vibrating block, and the elastic support members 10 are fixed between the vibrator and the shell in a limiting mode to provide elastic restoring force for vibration of the vibrator.
When the magnetic conduction block is displaced relative to the vibrator in the vibration direction of the vibrator, the vibrator moves towards one end of the linear vibration motor until the resultant force of the two magnetic field forces applied to the vibrator is smaller than the elastic force of the elastic supporting piece at one end of the mass block, so that the vibrator moves towards the opposite direction until the resultant force of the two magnetic field forces applied to the vibrator is smaller than the elastic force of the elastic supporting piece at the other end of the mass block, and the reciprocating motion of the vibrator is realized.
The linear vibration motor according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the linear vibration motor of the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (9)
1. A linear vibration motor comprises a shell, a vibrator and a stator which is fixed on the shell and is arranged in parallel with the vibrator, wherein the vibrator comprises a mass block and a vibration block embedded in the middle of the mass block, and the vibration block comprises a permanent magnet; it is characterized in that the preparation method is characterized in that,
two ends of the vibrating block are respectively connected with a push-pull structure in an adjacent mode;
the push-pull structure comprises a push-pull magnet embedded in the mass block and a push-pull coil fixed on the shell;
the push-pull magnet and the adjacent permanent magnet generate interaction force for enhancing the magnetic field;
after being electrified, the push-pull coil and the push-pull magnet generate push-pull force in the horizontal direction, and the push-pull force is provided for the vibrator to reciprocate in the direction parallel to the plane of the stator;
the magnetizing directions of the push-pull magnets are respectively parallel to the vibration direction and perpendicular to the vibration direction; wherein,
the push-pull magnet comprises a horizontally magnetized central magnet and side magnets positioned on two sides of the central magnet, and each side magnet comprises two vertically arranged magnets and a magnetic yoke positioned between the two magnets; wherein,
the central magnet is perpendicular to the magnetizing direction of the side magnets.
2. The linear vibration motor of claim 1,
the drive stator comprises a magnetic conduction block, the magnetic conduction block is opposite to the oscillator, the magnetic conduction block is fixed on the shell, and the magnetic conduction block is under the action of a magnetic field force in the same direction as and/or opposite to the vibration direction of the oscillator.
3. The linear vibration motor of claim 1,
the central magnet is horizontally magnetized, and the side magnets are vertically magnetized.
4. The linear vibration motor of claim 3,
the push-pull coils are arranged on the upper side and the lower side of the push-pull magnet in parallel, and the winding direction of the push-pull coils is parallel to the magnetizing direction of the central magnet.
5. The linear vibration motor of claim 1,
the vibrating block comprises at least two permanent magnets which are adjacently arranged, and the adjacent ends of the permanent magnets have the same polarity.
6. The linear vibration motor of claim 1,
a groove for accommodating the vibrating block is formed in the mass block, and two push-pull magnet accommodating grooves are symmetrically formed in two adjacent ends of the groove;
the push-pull magnet is embedded in the push-pull magnet accommodating groove.
7. The linear vibration motor of claim 2,
when the vibrator is in a balanced state, the resultant force of the magnetic field force of the vibrator on the magnetic conduction block is zero;
when the magnetic conduction block is acted by a push-pull force generated by the push-pull structure and is subjected to relative displacement with the vibrator in the vibration direction of the vibrator, the resultant force direction of the magnetic field force of the vibrator, which is received by the magnetic conduction block, is the same as the direction of the relative displacement, and the resultant force magnitude of the magnetic field force of the vibrator, which is received by the magnetic conduction block, is in direct proportion to the magnitude of the relative displacement.
8. The linear vibration motor of claim 2,
the vibrating block comprises three first permanent magnets, a second permanent magnet and a third permanent magnet which are sequentially arranged in an adjacent mode, and the magnetic conduction blocks are symmetrically located on the upper side and the lower side of the second permanent magnet.
9. The linear vibration motor of claim 2,
and an avoiding structure corresponding to the push-pull coil and the magnetic conduction block is arranged in the middle of the mass block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620117411.3U CN205583985U (en) | 2016-02-05 | 2016-02-05 | Linear vibrating motor |
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| CN201620117411.3U CN205583985U (en) | 2016-02-05 | 2016-02-05 | Linear vibrating motor |
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| CN205583985U true CN205583985U (en) | 2016-09-14 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655696A (en) * | 2016-11-30 | 2017-05-10 | 歌尔股份有限公司 | Linear vibration motor |
| WO2017133152A1 (en) * | 2016-02-05 | 2017-08-10 | 歌尔声学股份有限公司 | Linear vibration motor |
| CN107147267A (en) * | 2017-05-18 | 2017-09-08 | 歌尔股份有限公司 | Linear vibration motor |
| CN108462354A (en) * | 2017-02-22 | 2018-08-28 | 日本电产精密株式会社 | Vibrating motor |
| CN108462351A (en) * | 2017-02-22 | 2018-08-28 | 日本电产精密株式会社 | Vibrating motor |
| CN112187004A (en) * | 2020-10-15 | 2021-01-05 | 苏州索迩电子技术有限公司 | Broadband motor |
| CN112243188A (en) * | 2019-07-19 | 2021-01-19 | 歌尔股份有限公司 | Transducer magnetic circuit structure, transducer and electronic equipment thereof |
| CN117412226A (en) * | 2023-02-21 | 2024-01-16 | 东莞市惟动智能科技有限公司 | Moving coil vibrator with parallel magnetic coils and push-pull nonlinear cancellation function and application thereof |
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2016
- 2016-02-05 CN CN201620117411.3U patent/CN205583985U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133152A1 (en) * | 2016-02-05 | 2017-08-10 | 歌尔声学股份有限公司 | Linear vibration motor |
| US11469656B2 (en) | 2016-02-05 | 2022-10-11 | Goertek Inc. | Linear vibrating motor |
| CN106655696A (en) * | 2016-11-30 | 2017-05-10 | 歌尔股份有限公司 | Linear vibration motor |
| CN108462354A (en) * | 2017-02-22 | 2018-08-28 | 日本电产精密株式会社 | Vibrating motor |
| CN108462351A (en) * | 2017-02-22 | 2018-08-28 | 日本电产精密株式会社 | Vibrating motor |
| CN107147267A (en) * | 2017-05-18 | 2017-09-08 | 歌尔股份有限公司 | Linear vibration motor |
| CN107147267B (en) * | 2017-05-18 | 2023-11-24 | 歌尔股份有限公司 | Linear vibration motor |
| CN112243188A (en) * | 2019-07-19 | 2021-01-19 | 歌尔股份有限公司 | Transducer magnetic circuit structure, transducer and electronic equipment thereof |
| CN112243188B (en) * | 2019-07-19 | 2023-04-14 | 歌尔股份有限公司 | Transducer magnetic circuit structure, transducer and electronic equipment thereof |
| CN112187004A (en) * | 2020-10-15 | 2021-01-05 | 苏州索迩电子技术有限公司 | Broadband motor |
| CN112187004B (en) * | 2020-10-15 | 2021-08-03 | 苏州索迩电子技术有限公司 | Broadband motor |
| CN117412226A (en) * | 2023-02-21 | 2024-01-16 | 东莞市惟动智能科技有限公司 | Moving coil vibrator with parallel magnetic coils and push-pull nonlinear cancellation function and application thereof |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |