CN111313618B - Anti-interference flat motor - Google Patents
Anti-interference flat motor Download PDFInfo
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- CN111313618B CN111313618B CN202010389726.4A CN202010389726A CN111313618B CN 111313618 B CN111313618 B CN 111313618B CN 202010389726 A CN202010389726 A CN 202010389726A CN 111313618 B CN111313618 B CN 111313618B
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- 238000000034 method Methods 0.000 claims description 16
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- 230000035945 sensitivity Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
- H02K11/028—Suppressors associated with the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
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Abstract
The invention provides an anti-interference flat motor; flat motor includes casing subassembly, brush subassembly, stator module, anti-interference type rotor and last casing subassembly down: the electric brush assembly, the stator assembly and the anti-interference rotor are all installed in a space formed by the lower shell assembly and the upper shell assembly in an involutory mode. The flat motor has a reduced stacking space; effectively prevent the interference of the senses generated by the radio frequency circuit, the antenna and the IC due to the instability of the back electromotive force during the operation and after long-term use.
Description
Technical Field
The invention provides an anti-interference flat motor, and belongs to the technical field of mobile phone hardware.
Background
The sense is a very difficult problem in the field of mobile phone hardware, and current fluctuation is generated when an LCD (liquid crystal display), a charging motor and a motor work, so that a variable electromagnetic field can be generated, and certain paths of an antenna and radio frequency are interfered. The flat motor is widely used in the mobile phone because of its low cost and good structure. However, the flat motor is difficult to solve due to the fact that the number of periodic phase change times is large, extremely large current fluctuation is generated, and therefore, in order to solve the problem of the flat motor, many manufacturers add a shielding cover and a conductive adhesive tape on a motor body PCB. The contact area between the motor brush and the PCB Pad is changed, so that the contact impedance of the motor coil is changed, if the contact impedance between the motor brush and the PCB Pad is changed continuously, the reverse electromotive force is unstable, and very large Peak is generated; that is, the back electromotive force causes high EMC interference to the mobile phone.
Disclosure of Invention
The invention provides an anti-interference flat motor, aiming at solving the problems of sensitivity attenuation (sense), large occupied structure stacking space and high EMC interference on a mobile phone after long-time use of the existing flat motor for the mobile phone, and adopting the following technical scheme:
an anti-tamper flat motor comprising a lower housing assembly, a brush assembly, a stator assembly, an anti-tamper rotor, and an upper housing assembly: the electric brush assembly, the stator assembly and the anti-interference rotor are all arranged in a space formed by the lower shell assembly and the upper shell assembly in an involution mode; wherein,
a brush assembly mounted within the housing of the lower housing assembly for conducting electrical current;
the stator component is arranged above the electric brush component and used for generating a rotating magnetic field;
the anti-interference rotor is arranged above the stator assembly, and a pad part of the anti-interference rotor is in contact with a brush in the brush assembly; the anti-interference rotor upper surface with go up the housing assembly laminating for produce turning moment.
Further, the tamper resistant rotor includes a printed circuit PCB41, a first coil, a first tamper resistant component, a second coil, and a second tamper resistant component; wherein,
a plurality of pads are arranged on the printed circuit PCB 41;
the first wire end and the second wire end of the first coil are respectively and electrically connected with a bonding pad of the printed circuit PCB; a directional force for generating a rotation of the tamper resistant rotor;
the first anti-interference component is connected with the first coil in parallel and used for eliminating and inhibiting voltage and current fluctuation generated in the rotation process of the anti-interference rotor;
the first wire end and the second wire end of the second coil are respectively and electrically connected with the bonding pads of the printed circuit PCB 41; a directional force for generating a rotation of the tamper resistant rotor;
the second anti-interference assembly is connected with the second coil in parallel and used for eliminating and inhibiting voltage and current fluctuation generated in the rotation process of the anti-interference rotor.
Further, the first anti-jamming component comprises a first voltage dependent resistor and a first transient diode; wherein,
the first piezoresistor is connected with the first coil in parallel and used for inhibiting the anti-interference rotor from generating voltage spikes;
the first transient diode is connected with the first piezoresistor in parallel and used for eliminating current spikes generated by instability of reverse electromotive force in the rotation process of the anti-interference rotor.
Further, the second anti-interference component comprises a second voltage dependent resistor and a second transient diode; wherein,
the second piezoresistor is connected with the second coil in parallel and used for inhibiting the anti-interference rotor from generating voltage spikes;
and the second transient diode is connected with the second piezoresistor in parallel and is used for eliminating current spikes generated by instability of reverse electromotive force in the rotation process of the anti-interference rotor.
Further, the first coil is disposed on the printed circuit PCB41, and a first wire end of the first coil is electrically connected with a first pad on the printed circuit PCB; and the second wire end of the first coil is electrically connected with the second pad on the printed circuit PCB 41.
Furthermore, the second coil is arranged on the printed circuit PCB, and a first wire end of the second coil and a second wire end of the first coil are electrically connected on the same bonding pad; and the second wire end of the second coil is electrically connected with the third pad on the printed circuit PCB.
Furthermore, the anti-interference rotor also comprises an eccentric block and a plastic body;
the eccentric block is arranged on the printed circuit PCB and positioned between the first coil and the second coil, and meanwhile, the eccentric block is arranged at a non-central position of the printed circuit PCB and used for enabling the anti-interference rotor to generate vibration when rotating;
the plastic body is arranged on the printed circuit PCB and used for fixing the first coil, the second coil and the eccentric block.
Furthermore, a piezoresistor placing hole I, a piezoresistor placing hole II, a transient diode placing hole I and a transient diode placing hole II are arranged on the eccentric block;
the eccentric block adopts a symmetrical structure, and the first piezoresistor placing hole and the second piezoresistor placing hole are symmetrically arranged on the eccentric block by taking the symmetrical axis of the eccentric block 46 as a reference;
the first transient diode placing hole is formed in one side of the first piezoresistor placing hole, the second transient diode placing hole is formed in one side of the second piezoresistor placing hole, and the first transient diode placing hole and the second transient diode placing hole are symmetrically formed in the eccentric block by taking the symmetry axis of the eccentric block as a reference.
Furthermore, a piezoresistor placing groove I, a piezoresistor placing groove II, a transient diode placing groove I and a transient diode placing groove II are arranged on the eccentric block;
the first piezoresistor placing groove, the second piezoresistor placing groove, the first transient diode placing groove and the second transient diode placing groove are all arranged on the side wall of the eccentric block, which is close to one side of the pad of the printed circuit PCB.
Further, the eccentric block is a sector block with a radius of R1 and a central angle of 60 degrees;
the eccentric block determines the length R of the fan edge through a formula (1)1，Wherein, formula (1) is:
wherein,Ris the radius of the anti-jamming rotor,Nrepresenting the eccentric mass required to generate a biasing force in the anti-jamming rotor,ρwhich represents the density of the eccentric mass,ωrepresenting the rotational speed of the anti-jamming rotor,hindicating the desired height of the eccentric mass.
The invention has the beneficial effects that:
according to the anti-interference flat motor, voltage spikes are suppressed in a mode that the two coils are respectively connected with the piezoresistor and the transient diode in parallel, EMC interference generated by instability of reverse electromotive force is eliminated, and the anti-interference rotor can be effectively prevented from generating interference to radio frequency circuits and antennas around the anti-interference rotor in the operation processdesenseInterference; meanwhile, the piezoresistor and the transient diode can be directly arranged on the Printed Circuit Board (PCB) which is an internal component of the anti-interference rotor by connecting the piezoresistor and the transient diode in parallel, so that the space occupied by the anti-interference rotor is reduced.
At the same time, fromCan effectively prevent the increase of the voltage dependent resistor and the transient diodedesenseInterference, therefore, the flat motor does not need to increase a shielding case and a conductive adhesive tape during the use and installation process, the manufacturing cost is reduced, and the stacking space of the flat motor is reduced; meanwhile, the flat motor can effectively prevent the interference of reversed electromotive force instability to the radio frequency circuit, the antenna and the IC during operation and after long-term use.
Drawings
FIG. 1 is an exploded view of a flat motor according to the present invention;
FIG. 2 is a schematic plan view of the flat motor of the present invention;
FIG. 3 is a coil circuit schematic diagram of the anti-jamming rotor of the present invention, wherein (a) is a coil circuit schematic diagram of a parallel piezoresistor; (b) a coil circuit schematic diagram of a piezoresistor and a transient diode which are connected in parallel;
FIG. 4 is a first schematic diagram of IC interference according to the present invention;
FIG. 5 is a second schematic diagram of IC interference according to the present invention;
FIG. 6 is a schematic diagram of the operation of the transient diode of the present invention;
FIG. 7 is a first schematic view of the eccentric block structure according to the present invention;
FIG. 8 is a schematic view of a second eccentric block structure according to the present invention;
fig. 9 is a comparison graph of current waveforms of the flat motor of the present invention, in which (a) is a current waveform graph generated when the back electromotive force is unstable after the normal rotor is used, and (b) is a current waveform graph generated when the back electromotive force is unstable after the anti-interference rotor is used;
(1, lower housing assembly; 2, brush assembly; 3, stator assembly; 4, anti-tamper type rotor; 5, upper housing assembly; 11, lower housing; 12, fixing shaft; 21, FPC circuit board; 22, brush; 31, ring magnetic sheet; 32, spacer; 41, printed circuit PCB; 42, first coil; 43, first anti-tamper assembly; 44, second coil; 45, second anti-tamper assembly; 46, eccentric block; 47, plastic body; 48, bearing; 431, first varistor; 432, first transient diode; 451, second varistor; 452, second transient diode; 461, first varistor mounting hole; 462, second varistor mounting hole; 463, first transient diode mounting hole; 464, second transient diode mounting hole; 461 ', first varistor mounting groove; 462', second transient diode mounting groove; 463 ', first transient diode mounting groove; 464', a second transient diode placing groove; 51, an upper shell; 52, adhesive pad).
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides an anti-interference rotor and a flat motor, aiming at solving the problems that the existing flat motor for a mobile phone has sensitivity attenuation sense, occupies larger structure stacking space and generates higher EMC interference on the mobile phone after being used for a long time, and the technical scheme is as follows:
a tamper resistant flat motor, as shown in fig. 1 and 2, comprising a lower housing assembly 1, a brush assembly 2, a stator assembly 3, a tamper resistant rotor 4 and an upper housing assembly 5: the electric brush assembly 2, the stator assembly 3 and the anti-interference rotor 4 are all arranged in a space formed by the lower shell assembly 1 and the upper shell assembly 5 in an involution mode; wherein,
the electric brush component 2 is arranged in the shell of the lower shell component 1 and is used for conducting current;
the stator component 3 is arranged above the electric brush component 2 and is used for generating a rotating magnetic field;
a tamper resistant rotor 4 disposed above the stator assembly 3 and having a PAD (PAD) portion of the tamper resistant rotor 4 in contact with a brush in the brush assembly 2; the upper surface of the anti-interference rotor 4 is attached to the upper shell assembly 5 and used for generating rotating torque.
In this embodiment, the lower casing assembly 1 includes a lower casing 11 and a fixing shaft 12, wherein the fixing shaft 12 is fixedly installed at a central position of an inner surface of the lower casing 11; the brush assembly 2 includes an FPC board 21 and a brush 22; the brush 22 is welded on the FPC board 21; the stator assembly 3 comprises an annular magnetic sheet 31 and a gasket 32; a central annular hole of the ring-shaped magnet piece 31 is installed on the brush assembly 2 through the fixed shaft 12, and the brush 22 is positioned at the central annular hole of the ring-shaped magnet piece 31; the washer 32 is sleeved on the fixed shaft 12. A through hole is formed in the center of the anti-interference rotor 4, a bearing is arranged in the center of the through hole, and the bearing 48 of the anti-interference rotor bronze drum is arranged on the fixed shaft 12; the upper housing assembly 5 comprises an upper housing 51 and an adhesive pad 52; the adhesive gasket 52 is attached to the inner surface of the upper shell 51, and after the upper shell 51 is fastened with the lower shell 11, the adhesive gasket 52 is attached to the position between the upper shell 51 and the anti-interference rotor 4.
The technical effects of the scheme are as follows: by adopting the anti-interference rotor, the flat motor does not need to be additionally provided with a shielding cover and a conductive adhesive tape, so that the manufacturing cost is reduced, and the stacking space of the flat motor is reduced; meanwhile, the flat motor can effectively prevent the interference of the reversed electromotive force to the radio frequency circuit, the antenna and the IC caused by the instability of the reversed electromotive force during the operation and after long-term use, and the specific effect is as shown in fig. 9, wherein (a) in fig. 9 is a current waveform diagram generated when the reversed electromotive force is unstable after a common rotor is adopted, and (b) in fig. 9 is a current waveform diagram generated when the reversed electromotive force is unstable after an anti-interference rotor is adopted.
In one embodiment of the present invention, as shown in fig. 1, the tamper resistant rotor 4 comprises a printed circuit PCB41, a first coil 42, a first tamper resistant assembly 43, a second coil 44, and a second tamper resistant assembly 45; wherein,
a plurality of pads are arranged on the printed circuit PCB 41;
the first wire end and the second wire end of the first coil 42 are respectively electrically connected with the pad of the printed circuit PCB 41; for generating a directional force for rotating said anti-interference rotor 4;
the first anti-interference component 43 is connected in parallel with the first coil 42, and is used for eliminating and inhibiting voltage and current fluctuation generated in the rotation process of the anti-interference rotor 4;
the first terminal and the second terminal of the second coil 44 are electrically connected with the pads of the printed circuit PCB41 respectively; for generating a directional force for rotating said anti-interference rotor 4;
the second anti-interference component 45 is connected in parallel with the second coil 44, and is used for eliminating and suppressing voltage and current fluctuation generated in the rotation process of the anti-interference rotor 4.
The working principle of the technical scheme is as follows: a first anti-interference component 43 and a second anti-interference component 45 are respectively connected in parallel with the first coil 42 and the first coil 42; the first anti-interference component 43 and the second anti-interference component 45 respectively suppress voltage spikes generated in the first coil 42 and the first coil 42, and eliminate the current fluctuation influence generated by the back electromotive force in the coils and the interference generated on the radio frequency circuit and the antenna.
The technical effects of the scheme are as follows: the voltage spike generated in the running process of the rotor is prevented, the EMC interference generated by the instability of the back electromotive force is eliminated, and the generation of the anti-interference electrons on the radio frequency circuit and the antenna around the anti-interference electrons in the running process can be effectively preventeddesenseAnd (4) interference. Meanwhile, the first anti-interference component 43 and the second anti-interference component 45 are directly arranged on an internal component of the anti-interference rotor, namely a Printed Circuit Board (PCB), so that the space occupied by the anti-interference rotor is reduced.
In one embodiment of the present invention, as shown in fig. 3, the first interference rejection component 43 includes a first voltage dependent resistor 431 and a first transient diode 432; wherein,
the first voltage dependent resistor 431 is connected in parallel with the first coil 42 and is used for inhibiting the anti-interference rotor from generating voltage spikes;
the first transient diode 432 is connected in parallel with the first voltage dependent resistor 431, and is used for eliminating a current spike generated due to instability of a back electromotive force during rotation of the anti-interference rotor.
The second anti-interference component 45 comprises a second piezoresistor 451 and a second transient diode 452; wherein,
the second piezoresistor 451 is connected in parallel with the second coil 44 and is used for inhibiting the anti-interference rotor from generating voltage spikes;
the second transient diode 452 is connected in parallel with the second voltage dependent resistor 451, and is configured to eliminate a current spike generated by an unstable back electromotive force during the rotation of the anti-jamming rotor.
The first transient diode 432 and the second transient diode 452 both adopt bidirectional TVS transistors.
The working principle of the technical scheme is as follows: a varistor, and a first and a second varistor, are connected in parallel across the first and second coils, respectively, and, as shown in fig. 3, Coil1 and Coil2 represent the first and second varistor, respectively, and when the circuit experiences a high transient voltage, the voltage across the varistor increases to a value greater than its constant (clamped) voltage, which in turn increases the current and acts as a conductor. Another characteristic of the varistor is that even if the current increases, the voltage across it is almost equal to the clamping voltage. This results in the varistor acting like a self-regulator even in the event of voltage transients. Since the varistor is still able to keep the voltage increasing in the event of a voltage transient and to allow excessive current to pass through the varistor (indicating its self-regulating properties) in a very narrow voltage range in the event of a voltage transient, any voltage spike can be suppressed;
after the rotor is used for a period of time, because the electric brush and the PAD on the printed circuit PCB are rubbed for a long time to generate abrasion, the contact area between the electric brush and the PAD on the printed circuit PCB is changed, so that the contact impedance of a motor coil is changed, and if the contact impedance between the electric brush and the PAD on the printed circuit PCB is continuously changed, the reverse electromotive force is unstable, and very large Peak is generated;
on the other hand, as shown in fig. 4, when there are some large spatial radiation signals with irregular directional electromotive force, the signals directly interfere with the IC or the antenna to cause the motor sense, and when the signals are seriously dropped by more than 10db, the incoming call vibrates, which may cause a direct call interruption or an interruption in the telephone process. Therefore, the first transient diode 432 and the second transient diode 452 are respectively connected in parallel between the first voltage dependent resistor and the second voltage dependent resistor; as shown in fig. 5 and fig. 6, when the brush and PAD on the printed circuit PCB are worn out or otherwise generate a large back electromotive force, the TVS is turned on in reverse when the back electromotive force voltage exceeds the conducting voltage of the TVS, the resistance of the TVS tube is smaller and smaller as the back electromotive force increases, the conducting current is larger and larger, and when the maximum clamping voltage of the TVS is reached, the clamping is triggered, that is, the clamping is performed at a fixed voltage value, such as 40Vmax (unless the TVS exceeds the limit voltage, causing damage). The positive half cycle is a forward conducting voltage, when the voltage of the input signal exceeds Vf, the TVS conducts in the forward direction, and the voltage value is generally very low, so that the normal operation of the device cannot be influenced.
The technical effects of the scheme are as follows: the voltage spike generated in the running process of the rotor is prevented, the EMC interference generated by the instability of the back electromotive force is eliminated, and the generation of the anti-interference electrons on the radio frequency circuit and the antenna around the anti-interference electrons in the running process can be effectively preventeddesenseAnd (4) interference.
In one embodiment of the present invention, the first coil 42 is disposed on the printed circuit PCB41, and a first end of the first coil 42 is electrically connected to a first pad on the printed circuit PCB 41; a second terminal of the first coil 42 is electrically connected to a second pad on the printed circuit PCB 41. The second coil 44 is arranged on the printed circuit PCB41, and a first terminal of the second coil 44 and a second terminal of the first coil 42 are electrically connected on the same pad; terminal two of the second coil 44 is electrically connected to pad three on the printed circuit PCB 41.
The working principle of the technical scheme is as follows: six PADs are arranged in the center of the printed circuit PCB, and each PAD can be used for electric connection; two ends of the first coil 42 are electrically connected to two of the six PADs, respectively, and meanwhile, one end of the second coil 44 and one end of the first coil 42 are electrically connected to one PAD at the same time, and the other end of the second coil 44 is electrically connected to any one PAD except the PADs of the two connected coils.
The technical effects of the scheme are as follows: and energizing the first coil and the second coil to generate directional force for rotating the rotor.
In one embodiment of the present invention, as shown in fig. 1, the tamper resistant rotor 4 further includes an eccentric mass 46 and a plastic body 47;
the eccentric mass 46 is disposed on the printed circuit PCB41 in the middle of the first and second coils 42 and 44, and the eccentric mass 46 is disposed at a non-central position of the printed circuit PCB41 for generating vibration when the tamper resistant rotor 4 is rotated;
the plastic body 47 is disposed on the printed circuit PCB41 for fixing the first coil 42, the second coil 44 and the eccentric mass 46.
The working principle of the technical scheme is as follows: when the rotor rotates, the eccentric block 46 is arranged at the eccentric position, so that the rotor can vibrate when the standing posture rotates rapidly; the plastic body 47 covers the first coil 42, the first coil 42 and the eccentric block 46, through holes corresponding to the shape and position of the first coil and the second coil are formed, so that the first coil 42 and the first coil 42 are exposed, and the plastic body 47 fixes the first coil 42, the first coil 42 and the eccentric block 46, so that the first coil 42, the first coil 42 and the eccentric block 46 cannot shake or shift when the rotor rotates.
The technical effects of the scheme are as follows: the fixability of the first coil 42, said first coil 42 and the eccentric mass 46 is improved.
In one embodiment of the present invention, as shown in fig. 7, a first varistor placing hole 461, a second varistor placing hole 462, a first transient diode placing hole 463 and a second transient diode placing hole 464 are disposed on the eccentric block 46;
the eccentric block 46 adopts a symmetrical structure, and the first piezoresistor placing hole 461 and the second piezoresistor placing hole 462 are symmetrically arranged on the eccentric block 46 by taking the symmetrical axis of the eccentric block 46 as a reference;
the first transient diode placement hole 463 is disposed on the side of the first varistor placement hole 461, the second transient diode placement hole 464 is disposed on the side of the second varistor placement hole 462, the first transient diode placement hole 463 and the second transient diode placement hole 464 are symmetrically disposed on the eccentric mass 46 with reference to the axis of symmetry of the eccentric mass 46, and device bodies for the first varistor 431, the first transient diode 432, the second varistor 451, and the second transient diode 452 are disposed when the device bodies for the first varistor 431, the first transient diode 432, the second varistor 451, and the second transient diode 452 are disposed on the printed circuit PCB 41.
The working principle of the technical scheme is as follows: the first varistor placing hole 461, the second varistor placing hole 462, the first transient diode placing hole 463 and the second transient diode placing hole 464 are used for: when the device bodies of the first piezo-resistor 431, the first transient diode 432, the second piezo-resistor 451 and the second transient diode 452 are disposed on the printed circuit PCB41, the device bodies of the first piezo-resistor 431, the first transient diode 432, the second piezo-resistor 451 and the second transient diode 452 are placed.
The technical effects of the scheme are as follows: will the device body of first piezo-resistor, first transient state diode, second piezo-resistor and second transient state diode set up in the shared space of eccentric block, can effectively save occupation space, make the unnecessary space is not taken up outward to the rotor, simultaneously, after increasing the inside components and parts quantity of rotor, can not influence the inside original spare part structure of rotor, does not influence the operating performance of rotor. Meanwhile, the eccentric block rotates fast along with the rotor, and the symmetrically distributed hole bodies can effectively balance the mass of the eccentric block, so that the eccentric block cannot shake or be damaged due to uneven mass distribution, and meanwhile, the stability and the reliability of the rotary motion of the rotor are guaranteed.
In an embodiment of the present invention, as shown in fig. 8, the eccentric block 46 adopts a symmetrical structure, and the eccentric block 46 is provided with a first varistor placing slot 461 ', a second varistor placing slot 462', a first transient diode placing slot 463 'and a second transient diode placing slot 464';
the first varistor placing groove 461 ', the second varistor placing groove 462', the first transient diode placing groove 463 'and the second transient diode placing groove 464' are all arranged on the side wall of the eccentric block 46 close to one side of the pad of the printed circuit PCB; .
The working principle of the technical scheme is as follows: the first varistor placement slot 461 ', the second varistor placement slot 462', the first transient diode placement slot 463 'and the second transient diode placement slot 464' are used for embedding and mounting the device bodies of the first varistor 431, the first transient diode 432, the second varistor 451 and the second transient diode 452 in the eccentric block 46.
The technical effects of the scheme are as follows: the device bodies of the first piezoresistor 431, the first transient diode 432, the second piezoresistor 451 and the second transient diode 452 are embedded and installed in the eccentric block 46, so that the original part structure in the rotor can not be influenced and the running performance of the rotor can not be influenced after the number of components in the rotor is increased. Meanwhile, the first piezoresistor placing hole, the second piezoresistor placing hole, the first transient diode placing hole and the second transient diode placing hole are formed in the eccentric block, the part of the eccentric block which is lost due to the groove body is filled, and the volume and the mass of the eccentric block are small, so that the mass distribution of the eccentric block of the device body embedded with the first piezoresistor 431, the first transient diode 432, the second piezoresistor 451 and the second transient diode 452 and the eccentric block which is not provided with the groove body is basically not influenced, the position of the groove body is not required to be specially set, and the manufacturing cost and the manufacturing efficiency of the eccentric block are saved.
In one embodiment of the present invention, the eccentric block 46 is a sector block with a radius of R1 and a central angle of 60 °;
the eccentric mass 46 determines the length of the fan edge R by equation 11，Wherein, formula (1) is:
wherein,Ris the radius of the anti-jamming rotor,Nindicating the need for said eccentric mass to be produced in said anti-jamming rotorThe resulting force of the polarization of the light,ρwhich represents the density of the eccentric mass,ωrepresenting the rotational speed of the anti-jamming rotor,hindicating the desired height of the eccentric mass.
The working principle of the technical scheme is as follows: the eccentric block is provided with the groove body or the hole body structure, so that the structural form of the eccentric block is changed, the eccentric block is prevented from generating sound to the eccentric vibration effect due to the structural change of the eccentric block, the eccentric block is arranged to be of a fan-shaped structure, and the side length radius of the fan shape of the eccentric block is calculated by combining the polarization force requirement.
The technical effects of the scheme are as follows: the design of the angle and the side length size corresponding to the shape and the shape of the eccentric block can effectively ensure the stability of the rotation of the rotor and the stability of the vibration operation, and further ensure the stability and the reliability of the rotation and the vibration operation of the anti-interference rotor.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. An anti-jamming flat motor, characterized in that it comprises a lower housing assembly (1), a brush assembly (2), a stator assembly (3), an anti-jamming rotor (4) and an upper housing assembly (5): the electric brush assembly (2), the stator assembly (3) and the anti-interference rotor (4) are all arranged in a space formed by the lower shell assembly (1) and the upper shell assembly (5) in an involution mode; wherein,
the electric brush assembly (2) is arranged in the shell of the lower shell assembly (1) and is used for conducting current;
the stator assembly (3) is arranged above the electric brush assembly (2) and is used for generating a rotating magnetic field;
the anti-interference rotor (4) is arranged above the stator assembly (3), and a pad part of the anti-interference rotor (4) is in contact with a brush in the brush assembly (2); the upper surface of the anti-interference rotor (4) is attached to the upper shell assembly (5) and used for generating a rotating moment and preventing EMC interference;
the anti-interference rotor (4) comprises a printed circuit PCB (41), a first coil (42), a first anti-interference component (43), a second coil (44) and a second anti-interference component (45); wherein the first interference rejection assembly (43) is connected in parallel with the first coil (42) and the second interference rejection assembly (45) is connected in parallel with the second coil (44); and the first anti-jamming component (43) and the second anti-jamming component (45) each comprise a varistor and a transient diode, and the varistor and the transient diode are connected in parallel;
the anti-interference rotor (4) further comprises an eccentric block (46), wherein the eccentric block (46) is a sector block with the radius of R1 and the central angle of 60 degrees;
the eccentric block (46) determines the length R of the fan edge through the formula (1)1Wherein, the formula (1) is:
wherein,Ris the radius of the anti-jamming rotor,Nrepresenting the eccentric mass required to generate a biasing force in the anti-jamming rotor,
which represents the density of the eccentric mass,
represents the rotation speed of the anti-jamming type rotor,
indicating the desired height of the eccentric mass.
2. The flat motor as claimed in claim 1,
a plurality of welding pads are arranged on the printed circuit PCB (41);
the first wire end and the second wire end of the first coil (42) are respectively and electrically connected with a pad of a printed circuit PCB (41); for generating a directional force for rotating the anti-tamper rotor (4);
the first anti-interference component (43) is connected with the first coil (42) in parallel and used for eliminating and inhibiting voltage and current fluctuation generated in the rotation process of the anti-interference rotor (4);
the first wire end and the second wire end of the second coil (44) are respectively and electrically connected with a pad of the printed circuit PCB (41); for generating a directional force for rotating the anti-tamper rotor (4);
the second anti-interference assembly (45) is connected with the second coil (44) in parallel and used for eliminating and inhibiting voltage and current fluctuation generated in the rotation process of the anti-interference rotor (4).
3. Flat motor according to claim 2, characterised in that said first anti-jamming assembly (43) comprises a first varistor (431) and a first transient diode (432); wherein,
the first piezoresistor (431) is connected with the first coil (42) in parallel and used for inhibiting the anti-interference rotor from generating voltage spikes;
the first transient diode (432) is connected with the first voltage dependent resistor (431) in parallel and is used for eliminating current spikes generated by instability of a reverse electromotive force during the rotation process of the anti-interference rotor.
4. Flat motor according to claim 2, characterized in that said second anti-interference assembly (45) comprises a second varistor (451) and a second transient diode (452); wherein,
the second piezoresistor (451) is connected with the second coil (44) in parallel and used for inhibiting the anti-interference rotor from generating voltage spikes;
the second transient diode (452) is connected with the second piezoresistor (451) in parallel and used for eliminating current spikes generated by instability of a reverse electromotive force during the rotation process of the anti-interference rotor.
5. The flat motor according to claim 2, wherein the first coil (42) is disposed on the printed circuit PCB (41), and a first end of the first coil (42) is electrically connected to a first land on the printed circuit PCB (41); and the second wire end of the first coil (42) is electrically connected with the second pad on the printed circuit PCB (41).
6. The flat motor according to claim 2, wherein the second coil (44) is disposed on the printed circuit PCB (41), and a first terminal of the second coil (44) is electrically connected to a second terminal of the first coil (42) on the same land; and the second wire end of the second coil (44) is electrically connected with the third pad on the printed circuit PCB (41).
7. Flat motor according to claim 1, characterised in that said tamper-resistant rotor (4) further comprises a plastic body (47);
the eccentric block (46) is arranged on the printed circuit PCB (41) and positioned between the first coil (42) and the second coil (44), and meanwhile, the eccentric block (46) is arranged at a non-central position of the printed circuit PCB (41) and used for generating vibration when the anti-interference rotor (4) rotates;
the plastic body (47) is arranged on a printed circuit PCB (41) and is used for fixing the first coil (42), the second coil (44) and the eccentric block (46).
8. The flat motor as claimed in claim 7, wherein the eccentric mass (46) is provided with a first varistor placing hole (461), a second varistor placing hole (462), a first transient diode placing hole (463) and a second transient diode placing hole (464);
the eccentric block (46) adopts a symmetrical structure, and the first piezoresistor placing hole (461) and the second piezoresistor placing hole (462) are symmetrically arranged on the eccentric block (46) by taking the symmetrical axis of the eccentric block (46) as a reference;
the first transient diode placing hole (463) is formed on the side of the first varistor placing hole (461), the second transient diode placing hole (464) is formed on the side of the second varistor placing hole (462), and the first transient diode placing hole (463) and the second transient diode placing hole (464) are symmetrically formed on the eccentric block (46) with reference to the axis of symmetry of the eccentric block (46).
9. The flat motor as claimed in claim 7, wherein the eccentric mass (46) is provided with a first varistor placing groove (461 '), a second varistor placing groove (462'), a first transient diode placing groove (463 ') and a second transient diode placing groove (464');
the first varistor placing groove (461 '), the second varistor placing groove (462'), the first transient diode placing groove (463 ') and the second transient diode placing groove (464') are all arranged on the side wall of the eccentric block (46) close to the pad side of the printed circuit PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389726.4A CN111313618B (en) | 2020-05-11 | 2020-05-11 | Anti-interference flat motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389726.4A CN111313618B (en) | 2020-05-11 | 2020-05-11 | Anti-interference flat motor |
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| CN111313618A CN111313618A (en) | 2020-06-19 |
| CN111313618B true CN111313618B (en) | 2020-09-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2556840Y (en) * | 2002-04-10 | 2003-06-18 | 姚其槐 | Ipmroved miniature pancake oscillating motor |
| CN1610217A (en) * | 2004-11-10 | 2005-04-27 | 信利电机（汕尾）有限公司 | Flat vibrating motor |
| CN103427583A (en) * | 2013-08-09 | 2013-12-04 | 重庆市灵龙电子有限公司 | Flat interference-proof vibration motor |
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
| CN208209718U (en) * | 2018-05-23 | 2018-12-07 | 深圳市泓之发机电有限公司 | A kind of FPC plate and flat electric machine for flat electric machine |
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2020
- 2020-05-11 CN CN202010389726.4A patent/CN111313618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2556840Y (en) * | 2002-04-10 | 2003-06-18 | 姚其槐 | Ipmroved miniature pancake oscillating motor |
| CN1610217A (en) * | 2004-11-10 | 2005-04-27 | 信利电机（汕尾）有限公司 | Flat vibrating motor |
| CN103427583A (en) * | 2013-08-09 | 2013-12-04 | 重庆市灵龙电子有限公司 | Flat interference-proof vibration motor |
| CN103474977A (en) * | 2013-09-30 | 2013-12-25 | 深圳科安达电子科技股份有限公司 | Lightning protection device, lightning protection combination and lightning protection cabinet |
| CN208209718U (en) * | 2018-05-23 | 2018-12-07 | 深圳市泓之发机电有限公司 | A kind of FPC plate and flat electric machine for flat electric machine |
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| Publication number | Publication date |
|---|---|
| CN111313618A (en) | 2020-06-19 |
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