CN111384834A - Carrier type exciter device - Google Patents
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- CN111384834A CN111384834A CN201811640533.0A CN201811640533A CN111384834A CN 111384834 A CN111384834 A CN 111384834A CN 201811640533 A CN201811640533 A CN 201811640533A CN 111384834 A CN111384834 A CN 111384834A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
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Abstract
The invention discloses a carrier type exciter device. This carrier formula exciter device includes electromagnetic exciter and load element, electromagnetic exciter includes the casing, the magnetic conduction oscillator, coil and permanent magnet, the inside formation cavity of casing, the permanent magnet, coil and magnetic conduction oscillator are located the cavity, load element is located outside the cavity, the magnetic conduction oscillator includes interconnect's stiff end and free portion, the stiff end is fixed on the casing, partly and permanent magnet phase place of free portion are relative and looks interval, the coil cover is established outside the free portion, free portion includes connecting portion, the casing has the through-hole, connecting portion stretches out from the through-hole, connecting portion and load element are connected, the coil responds the alternating signal of external circuit, produce alternating magnetic field, the magnetic conduction oscillator is magnetized under the effect in magnetic field, the permanent magnet is configured to and free portion interact, in order to drive the magnetic conduction oscillator vibration, the magnetic conduction oscillator drives load element vibration.
Description
Technical Field
The invention relates to the technical field of electromagnetic vibration, in particular to a carrier type exciter device.
Background
The electromagnetic exciter has various types, and is classified according to the principle, wherein the electromagnetic exciter comprises a moving coil type, a moving magnet type and a moving iron type, and a rotor of the electromagnetic exciter is respectively a coil, a magnet and a magnetic conducting armature; the transmission modes are classified according to the transmission modes, including a direct drive mode and a resonant mode.
The moving coil type exciter is forced to move by passing a proper current through a coil placed in a magnetic field according to ampere's law. The exciter is simple and intuitive in design, is convenient for optimization adjustment and later maintenance, but is difficult to design a product with larger exciting force under the condition of limited volume due to low utilization rate of a magnetic field.
The moving magnet type exciter can be moved by utilizing the stress of an electrified lead wire or the acting force between a plurality of permanent magnets and between the permanent magnets and a magnetic conductive material. However, since the position of the moving magnet is not easily fixed, the unbalanced stress caused by the non-linear change of the magnetic field of the permanent magnet under the external action must be considered all the time, the design is difficult, and the optimization adjustment and the subsequent maintenance are not facilitated.
The moving iron type exciter can move by utilizing the stress of the electrified lead wire and the acting force between the permanent magnet and the magnetic conduction rotor, and can not cause great change of a magnetic field in the moving process. The product with large exciting force and high stability is easy to design.
The rotor is directly connected with the load and drives the load to move. The force transmission is relatively direct, and the load motion is mainly stimulated by means of the exciting force.
The rotor of the resonant exciter is not connected with the load and drives the load to move by the self mass of the rotor. The transmission of force depends on the mass of the mover, and the excitation force is an internal force only used to excite the mover.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
It is an object of the present invention to provide a new solution for a carrier-type actuator device.
According to a first aspect of the invention, a carrier-type actuator device is provided. The carrier type exciter device comprises an electromagnetic exciter and a load element, wherein the electromagnetic exciter comprises a shell, a magnetic-conducting vibrator, a coil and a permanent magnet, a cavity is formed in the shell, the permanent magnet, the coil and the magnetic-conducting vibrator are positioned in the cavity, the load element is positioned outside the cavity, the magnetic-conducting vibrator comprises a fixed end and a suspended part which are connected with each other, the fixed end is fixed on the shell, one part of the suspended part is opposite to the permanent magnet and is separated from the permanent magnet, the coil is sleeved outside the suspended part, the suspended part comprises a connecting part, the shell is provided with a through hole, the connecting part extends out of the through hole, the connecting part is connected with the load element, the coil responds to an alternating signal of an external circuit to generate an alternating magnetic field, and the magnetic-conducting vibrator is magnetized under the action of the magnetic field, the permanent magnet is configured to interact with the suspended portion to drive the magnetically conductive vibrator to vibrate, and the magnetically conductive vibrator drives the load element to vibrate.
Optionally, the connection portion is rigidly connected to the load element; or the connecting part is connected with the load element through an elastic connecting piece.
Optionally, the connecting portion is connected to the load element through an elastic connecting member, and the elastic connecting member is at least one of a spring, an elastic sheet, an elastic rubber member, and an elastic silicone member.
Optionally, the magnetic conducting vibrator is of an L-shaped structure, the L-shaped structure includes a first side and a second side that are connected to each other, the end of the first side is the fixed end, the coil is sleeved outside the first side, the permanent magnet is opposite to the first side, the second side is the connecting portion, and the end of the second side is connected to the load element.
Optionally, a magnetic fluid is disposed between the coil and the magnetic conducting vibrator and/or between the permanent magnet and the magnetic conducting vibrator.
Optionally, the housing comprises a first housing and a second housing, and the fixing end is clamped and fixed in a wall of the first housing and the second housing.
Optionally, the load element is at least one of a diaphragm, a weight, and a plate for sound production.
Optionally, the load element is an LED screen, an LCD screen or an OLED screen.
Optionally, the permanent magnet includes a first magnet and a second magnet oppositely disposed on two sides of the magnetic conductive vibrator along the vibration direction.
Optionally, the number of the permanent magnets is multiple, and the multiple permanent magnets form a helmholtz array.
According to one embodiment of the present disclosure, the carrier type actuator device has the characteristics of small volume, large amplitude and good vibration effect.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is an exploded view of a portion of an electromagnetic exciter according to one embodiment of the present disclosure.
Fig. 2 is a cross-sectional view of a carrier-type actuator device according to one embodiment of the present disclosure.
Fig. 3 is a cross-sectional view of a second carrier-type actuator device according to one embodiment of the present disclosure.
FIG. 4 is a cross-sectional view of a third carrier-type actuator device according to one embodiment of the present disclosure.
FIG. 5 is a cross-sectional view of a fourth carrier-type actuator device, according to one embodiment of the present disclosure.
Description of reference numerals:
11: a first housing; 12; a second housing; 13: a first magnet; 14: a second magnet; 15: a fixed end; 16: a coil; 17: a fixed part; 19: a shielding sheet; 20: a gap; 21: a first side; 22: a second edge; 25: a magnetic conductive vibrator; 26: a liquid crystal screen; 27: a balancing weight; 28: FPCB; 29: a through hole; 31: a spring; 32: vibrating diaphragm; 33: DOME.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one embodiment of the present disclosure, a carrier-type actuator device is provided. As shown in fig. 1 and 2, the carrier-type actuator device includes an electromagnetic actuator and a load element. The electromagnetic exciter comprises a housing, a magnetically conductive vibrator 25, a coil 16 and a permanent magnet. A part of the housing serves as a fixing portion 17. The interior of the housing forms a cavity. The magnetically permeable vibrator 25, the coil 16 and the permanent magnet are arranged in the cavity. For example, the housing includes a first shell 11 and a second shell 12 that snap together. A cavity is formed inside the two housings 11, 12. For example, the housing is square in its entirety. The first housing 11 forms a cavity with an open end. The second housing 12 closes over the open end. The shell is made of metal, plastic, ceramic, glass and the like.
For example, the first housing 11 and the second housing 12 are made of a magnetic conductive material. The magnetic conductive material may be, but is not limited to, ferrite material, tungsten steel, or SPCC, etc. The materials have good magnetic conduction effect. Since the thickness of the permanent magnet is generally small. The magnetizing direction is along the thickness direction. In this way, the two poles are susceptible to magnetic shorts. The permanent magnet is disposed on the first housing 11 or the second housing 12. Because the two shells 11 and 12 have magnetic conduction effect, the occurrence of magnetic short circuit can be effectively avoided, and the magnetism of the permanent magnet is obviously improved.
The magnetic conductive vibrator 25 includes a fixed end 15 and a suspended portion connected to each other. The magnetic vibrator 25 is made of a magnetic material. The magnetically permeable material is as described above. For example, the magnetic conductive vibrator 25 has a strip-shaped plate structure or other structures.
The fixed end 15 is fixed to the fixing portion 17. The fixing portion 17 may be a component of the electronic terminal where the load actuator is located, such as a frame, an inner wall, or the like; alternatively, the fastening end 15 can be fastened to a wall of the housing. The portion of the wall to which the fixed end 15 is fixed is a fixed portion 17. The suspension part is suspended in the cavity to form a cantilever beam structure. For example, as shown in fig. 2 to 5, the fixed end 15 is fixed between the first housing 11 and the second housing 12. The fixing is formed by bonding, welding and clamping. This can firmly fix the magnetic conductive vibrator 25.
It is also possible that the fixed end 15 is fixed relative to the housing by other means. For example, the fixed end 15 is fixed by being sandwiched in the coil 16. The coil 16 is fixed to the housing by an adhesive or the like.
The suspension portion is opposed to and spaced apart from the permanent magnet to form a vibration space. The coil 16 is configured for magnetizing the suspension. The coil 16 is sleeved outside the suspended part.
The housing has a through hole 29. For example, a through hole 29 is provided on the side of the housing opposite to the fixing portion 17. The connecting portion protrudes from the through hole 29. The load element is located outside the housing. The connection portion is directly or indirectly connected to the load element.
The coil 16 generates an alternating magnetic field in response to an alternating signal of an external circuit, and the magnetically conductive vibrator 25 is magnetized by the magnetic field. The permanent magnet is configured to interact with the suspended portion to drive the magnetically permeable vibrator 25 to vibrate, and the magnetically permeable vibrator 25 drives the load element to vibrate.
The interaction force, i.e., the driving force, between the magnetic vibrator 25 and the permanent magnet can be calculated by the following formula:
wherein,
wherein M is the medium magnetization, B is the magnetic induction, n is the surface normal vector, murIs the relative permeability of the magnetic medium, mu0The magnetic permeability is vacuum magnetic permeability and S is area. If it is assumed that the magnetic field is uniform in the force-bearing region of the magnetically conductive vibrator, the above equation can also be expressed in simplified form as follows:
it can be seen that the driving force of the magnetic conductive vibrator 25 is proportional to the square of the magnetic induction intensity and the area. In general, the area of the magnetic conductive vibrator is hardly increased by the influence of the application environment, and the driving force can be effectively increased by increasing the magnetic induction intensity of the permanent magnet. For example, the magnetic induction can be increased by providing a permanent magnet with higher magnetic induction, or by using a plurality of permanent magnets together, for example, the plurality of permanent magnets form a halbach array to increase the magnetic induction.
In the present embodiment, the magnetic conductive vibrator 25 forms a cantilever structure. The suspended portion is magnetized by the energized coil 16, and thus has magnetism. The polarity of the permanent magnet is the same as or opposite to that of the suspended portion, thereby forming a repulsive force or an attractive force. When the coil 16 is energized with an alternating current, the magnetically conductive vibrator 25 generates a reciprocating vibration, thereby vibrating the load element. The load exciter has the advantages of high magnetic field utilization rate, large driving force, small volume of the magnetic conduction vibrator 25, large amplitude and good vibration effect.
The cantilever-structured magnetic vibrator 25 is light in weight, has a small high frequency attenuation, and can provide stable high-frequency vibration. And the amplitude of the magnetic conductive vibrator 25 is larger at high frequency, and the response is quicker. In addition, the cantilever structure has stable structure, and the magnetic conduction vibrator is stressed uniformly during vibration.
In addition, the magnetic conductive vibrator 25 of the cantilever structure can present different vibration modes under the excitation of different frequencies. The vibration modes at different frequencies increase the vibration amplitude of the magnetically conductive vibrator 25 in this frequency range, thereby widening the frequency band range of the carrier-type exciter device.
For example, the load element is at least one of the diaphragm 32, the weight 27, and a plate for sound emission. When the load element is a diaphragm 32, as shown in fig. 2, the carrier-type exciter means is used for vibration sound generation. The diaphragm 32 includes a center portion, an edge portion, and a corrugated portion between the edge portion and the center portion. DOME33 is fixed to the center. The end of the connecting part is fixedly connected with the central part through an adhesive.
As shown in fig. 4, the carrier-type exciter device is used to provide electromagnetic vibration, such as a vibration motor, when the load element is a weight 27. The weight 27 is made of metal, plastic, ceramic, glass, etc.
When the load element is a plate for sound production, the carrier-type actuator device is used for vibration sound production, as shown in fig. 3. The board may be a housing wall PCB, FPCB, etc. of the electronic terminal. For example, the shell wall is made of metal, ceramic, plastic, glass, or the like.
Preferably, the load element is a liquid crystal screen 26. Such as LED screens, LCD screens, OLED screens, etc. The electromagnetic exciter drives the liquid crystal screen 26 to vibrate and sound.
In one example, the connection portion is rigidly connected to the load member, as shown in fig. 2-4. For example, the connection portion is directly bonded to the load member by an adhesive. In this connection, the vibration of the magnetic vibrator 25 is directly transmitted to the load element, and the transmission efficiency is high.
It is also possible that the connection part is connected to the load element by means of a rigid material. Rigid materials include metal, glass, ceramic, wood, and the like.
In one example, the connection is with the load element through a resilient connection, as shown in fig. 5. The elastic connecting piece can generate elastic deformation and has low rigidity. The connecting part and the load element form a flexible connection. The flexible connection mode can change the vibration mode of the magnetic conduction vibrator 25, so that the resonance frequency of the carrier type exciter device is reduced, and the low-frequency effect of the carrier type exciter device is improved.
For example, the elastic connection member may be, but is not limited to, at least one of a spring 31, a spring plate, an elastic rubber member, and an elastic silicone member. The materials can be elastically deformed.
In one example, the suspension passes through the coil 16 and out one end of the coil 16, as shown in fig. 2-5. At least a part of the portion of the suspended portion outside the coil 16 is opposed to the permanent magnet. The coil 16 has a hollow structure. The suspended portion extends in the axial direction of the coil 16. A part of the suspended portion is located in the hole of the coil 16. In this way, the magnetic conductive vibrator 25 is provided to make full use of the space inside the coil 16, which is advantageous for the compact design of the carrier type exciter device.
Further, the suspended portion is located at the center of the coil 16. This makes the suspension more fully magnetized, more magnetic and more driving force of the carrier-type actuator device.
In other examples, the coil 16 is located outside the suspended portion. In this arrangement, the magnetically conductive vibrator 25 can be magnetized as well.
Preferably, the coil 16 is spaced from the suspension to provide a vibration space for vibration of the suspension. In this way, the length of the free space can be extended, so that the amplitude of the carrier-type exciter arrangement is greater.
In addition, the spacing arrangement enables the coil 16 to dissipate heat more efficiently.
In other examples, the coil 16 and the suspension form a multi-point support therebetween. This arrangement allows the coil 16 to dissipate heat more quickly, which improves the long-term performance of the carrier-type actuator device.
In one example, the magnetically permeable vibrator is in an L-shaped configuration, as shown in fig. 1-4. The L-shaped structure comprises a first side 21 and a second side 22 connected to each other. The first side 21 terminates in a fixed end 15. The fixed end 15 is clamped and fixed between the wall of the first housing 11 and the wall of the second housing 12. The coil 16 is sleeved outside the first edge 21. The permanent magnet is opposite to the first side 21. The coil 16 is located between the permanent magnet and the stationary part 17. The second side 22 protrudes outwardly from the coil 16 or permanent magnet. The second edge 22 is a connecting portion. The end of the second side 22 is connected to the load element, for example, by a rigid or flexible connection. The distance between the connection portion of the L-shaped magnetic conductive vibrator 25 and the load element is small, and the connection therebetween is facilitated.
The magnetic conductive vibrator 25 of this structure is easy to process and manufacture, and is formed at a time by, for example, pressing.
In another example, as shown in fig. 5, the magnetic conductive vibrator 25 has a sheet structure. The ends of the sheet-like structures project outwardly from the through-holes 29 of the housing to form connections. The connecting portion is connected with the load element through a rigid material or an elastic connecting piece. This arrangement is also capable of transmitting vibrations.
In other examples, the permanent magnet is located between the fixed part 17 and the coil 16. The magnetic conductive vibrator 25 passes through the coil. The connection portion is located outside the coil 16.
In one example, as shown in fig. 4 and 5, the permanent magnet includes a first magnet 13 and a second magnet 14 disposed opposite to each other. The magnetic induction intensity of the magnetic field formed by the arrangement mode is uniform, so that the magnetic conduction vibrator 25 is uniformly stressed when vibrating. For example, the first magnet 13 and the second magnet 14 are both bar magnets. The first magnet 13 and the second magnet 14 may be, but are not limited to, ferrite magnets and neodymium iron boron magnets.
The polarities of the sides of the first magnet 13 and the second magnet 14 close to each other are opposite. Thus, the magnetic induction strength between the first magnet 13 and the second magnet 14 is stronger. The suspended portion is located between the first magnet 13 and the second magnet 14 and is spaced apart from the first magnet 13 and the second magnet 14. For example, the first magnet 13 and the second magnet 14 are symmetrically disposed on the upper and lower sides of the suspended portion in the vibration direction. The upper surface of the suspended portion faces the N-pole of the first magnet 13, and the lower surface faces the S-pole of the second magnet 14. When the coil 16 is energized, the suspended portion is magnetized to the N-pole.
Thus, the suspended portion is repelled from the first magnet 13 and attracted to the second magnet 14. This causes the suspended portion to be acted upon by the magnetic forces of the two magnets, and the directions of the two acting forces are the same. The carrier type exciter device has stronger driving force, larger amplitude and higher vibration sensitivity.
Of course, the permanent magnets are not limited to two, and may be provided in more. For example, a plurality of permanent magnets are provided on the inner wall of the housing in the extending direction of the magnetically conductive vibrator 25. It is also possible that a plurality of permanent magnets form a helmholtz array to increase the magnetic properties.
Of course, the arrangement of the plurality of permanent magnets is not limited to this, and those skilled in the art can arrange the permanent magnets according to actual needs.
In one example, the second housing 12 is generally sheet-like in configuration. A shield plate 20 is provided on the outside of the second housing 12. The shielding plate 20 is made of a magnetic conductive material, and can play a role of magnetic conduction, reduce the occurrence of magnetic leakage, make the magnetic field of the permanent magnet stronger, and make the driving force of the carrier type exciter device larger.
As shown in fig. 1 to 5, the second housing 12 has a protruding portion protruding from a side wall of the first housing 11, and the FPCB28 is provided on the protruding portion. The FPCB28 is electrically connected to the coil 16. The external device supplies power to the coil 16 through the FPCB 28.
In one example, a magnetic fluid is filled between the suspension and the permanent magnet and/or between the suspension and the coil 16. For example, a gap 20 is formed between the suspended portion and the permanent magnet. The magnetic liquid is disposed in the gap 20. The magnetic liquid is formed by mixing nano-scale magnetic solid particles, base carrier liquid and surfactant, and is stable colloidal liquid. The magnetic liquid does not show magnetism in a static state; when an external magnetic field acts, the magnetic liquid is magnetized and shows magnetism. The magnetic fluid has viscosity and can generate damping, so that the vibration of the magnetic conduction vibrator 25 is more stable.
In addition, the magnetic fluid has a magnetic permeability. Thus, the magnetic liquid is adsorbed in the region of the suspended portion where the magnetic field intensity is high, and does not flow freely, resulting in high stability.
According to another embodiment of the present disclosure, an electronic terminal is provided. The electronic terminal may be, but is not limited to, a mobile phone, a tablet computer, a smart watch, a notebook computer, a game machine, an interphone, an earphone, a hearing aid, etc. The electronic terminal comprises the carrier-type actuator device. The carrier-type actuator device is used to provide physical vibration. The carrier-type actuator device may be, for example, a screen sound emitting device, in this example, the load element is a liquid crystal screen 26.
The vibration device may be used for touch vibration prompt of the electronic terminal, or vibration prompt under other application conditions. In this example, the load element is a weight 27; or for vibration therapy apparatus.
The electronic terminal has the characteristics of large amplitude and good vibration effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A carrier type exciter device comprises an electromagnetic exciter and a load element, wherein the electromagnetic exciter comprises a shell, a magnetic-conducting vibrator, a coil and a permanent magnet, a cavity is formed in the shell, the permanent magnet, the coil and the magnetic-conducting vibrator are located in the cavity, the load element is located outside the cavity, the magnetic-conducting vibrator comprises a fixed end and a suspension portion which are connected with each other, the fixed end is fixed on the shell, one part of the suspension portion is opposite to the permanent magnet and is spaced from the permanent magnet, the coil is sleeved outside the suspension portion, the suspension portion comprises a connecting portion, the shell is provided with a through hole, the connecting portion extends out of the through hole, the connecting portion is connected with the load element, the coil responds to an alternating signal of an external circuit and generates an alternating magnetic field, and the magnetic-conducting vibrator is magnetized under the action of the magnetic field, the permanent magnet is configured to interact with the suspended portion to drive the magnetically conductive vibrator to vibrate, and the magnetically conductive vibrator drives the load element to vibrate.
2. A carrier-type actuator device according to claim 1, wherein the connecting portion is rigidly connected to the load element; or the connecting part is connected with the load element through an elastic connecting piece.
3. The carrier-type actuator device of claim 2, wherein the connecting portion is connected to the load element by a resilient connection, the resilient connection being at least one of a spring, a leaf spring, a resilient rubber, and a resilient silicone.
4. The carrier-type exciter apparatus of claim 1, wherein the magnetic conducting vibrator is an L-shaped structure, the L-shaped structure comprises a first side and a second side connected with each other, the end of the first side is the fixed end, the coil is sleeved outside the first side, the permanent magnet is opposite to the first side, the second side is the connecting portion, and the end of the second side is connected with the load element.
5. The carrier-type exciter assembly of any of claims 1 to 4, wherein a magnetic fluid is provided between the coil and the magnetically conductive vibrator and/or between the permanent magnet and the magnetically conductive vibrator.
6. A carrier-type exciter device according to any of claims 1 to 4, wherein the housing comprises a first housing and a second housing, the fixed ends being clip-fixed in the wall of the first housing and the second housing.
7. The carrier-type exciter device of any of claims 1 to 4, wherein the load element is at least one of a diaphragm, a weight, and a plate for sound production.
8. Carrier-type actuator device according to any one of claims 1 to 4, wherein the load element is an LED screen, an LCD screen or an OLED screen.
9. The carrier-type exciter device of any of claims 1-4, wherein the permanent magnet comprises a first magnet and a second magnet oppositely disposed on either side of the magnetically conductive vibrator along the direction of vibration.
10. The carrier-type exciter device of any of claims 1 to 4, wherein there are a plurality of permanent magnets forming a Helmholtz array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811640533.0A CN111384834A (en) | 2018-12-29 | 2018-12-29 | Carrier type exciter device |
| PCT/CN2019/127240 WO2020135283A1 (en) | 2018-12-29 | 2019-12-21 | Carrier-type exciter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811640533.0A CN111384834A (en) | 2018-12-29 | 2018-12-29 | Carrier type exciter device |
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| CN111384834A true CN111384834A (en) | 2020-07-07 |
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| CN201811640533.0A Pending CN111384834A (en) | 2018-12-29 | 2018-12-29 | Carrier type exciter device |
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| WO (1) | WO2020135283A1 (en) |
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|---|---|---|---|---|
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| WO2020135283A1 (en) | 2020-07-02 |
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