CN216216449U - Axial motion double-traction vibration motor - Google Patents

Abstract

The utility model discloses an axial movement double-traction vibration motor, which belongs to the field of miniature vibration motors and comprises a shell, a stator assembly, a rotor assembly and an end cover, wherein the shell is connected with the end cover, the stator assembly is fixed between the shell and the end cover, the rotor assembly is of a double-spring structure and is arranged in the stator assembly and does axial amplitude relative to the stator assembly, and two springs arranged on the rotor assembly are respectively fixed between the two axial ends of the stator assembly and the shell and the end cover. The vibration feedback device is reasonable in structural design and good in vibration effect, and can solve the problems that a traditional vibration motor is easy to wear, generates friction noise, is poor in vibration experience effect and the like in vibration feedback.

Description

Axial motion double-traction vibration motor

Technical Field

The utility model belongs to the technical field of miniature vibration motors, and provides an axial motion double-traction vibration motor.

Background

With the development of electronic technology, portable consumer electronic products are more and more sought after by people, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, and the like, generally use vibration motors to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like. Such a wide application requires a vibration motor having high performance and long service life.

The mode of traditional vibrating motor realization vibration feedback is through rotor motor plus eccentric weight, promptly: when the motor rotates, the rotor drives the eccentric weight to rotate, and the centrifugal force generated by the rotating eccentric weight is transferred to the carrier to generate the vibration feeling sensed by people; however, the vibration motor of this structure has the following disadvantages: 1) the rotor motor usually adopts a brush motor structure, and a commutator of the brush motor and an electric brush are easy to rub and wear, so that the service life of the product is short, and friction noise can be generated; 2) when the electric brush and the commutator are commutated, sparks are easily generated, and other electronic components are easily subjected to electromagnetic interference; 3) the rotor motor is provided with a bearing and shaft structure, and a shaft and the bearing rub when rotating, so that abrasion exists for a long time, the service life is influenced, and certain friction noise is brought; 4) after the rotor motor stops supplying power, the motor stops for a long time under the action of inertia, and vibration experience is influenced; 5) the control mode is single, different vibration experiences in different modes cannot be made, and the requirements of the vibration motor are difficult to meet.

Therefore, it is required to provide a new vibration motor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention aims to provide an axial motion dual-traction vibration motor with reasonable structural design and good vibration effect, and aims to solve the problems of easy wear, friction noise generation, poor vibration experience effect, etc. of the conventional vibration motor in vibration feedback.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an axial movement double-traction vibration motor which comprises a shell, a stator component, a rotor component and an end cover, wherein the shell is connected with the end cover, the stator component is fixed between the shell and the end cover, the rotor component is of a double-spring structure and is arranged in the stator component and does axial amplitude relative to the stator component, and two springs arranged on the rotor component are respectively fixed between the two axial ends of the stator component and the shell and between the two axial ends of the stator component and the end cover.

Furthermore, the end cover and the shell are fixedly connected through hot riveting.

Further, the stator assembly comprises a magnetic frame, a wire frame, a coil and a square needle, the square needle is arranged on the wire frame, the coil is wound on the wire frame through the square needle, and the magnetic frame is sleeved outside the coil.

Furthermore, a first winding groove and a second winding groove which are distributed at intervals are formed in the wire frame, and needle holes used for installing three square needles are formed in the wire frame and located on a partition between the first winding groove and the second winding groove.

Furthermore, the wire frame is provided with a abdicating step for installing the magnetic frame, the magnetic frame is provided with a split line which axially penetrates through, and the magnetic frame is provided with a window for exposing the square needle.

Furthermore, the end faces of the two axial ends of the wire frame are respectively provided with an outer positioning lug boss for limiting the spring on the side where the outer positioning lug boss is located.

Further, the active cell subassembly still includes spacer, fixed block, magnetic conductive plate, magnet steel and axostylus axostyle, overlaps respectively at the axial both ends of axostylus axostyle to be equipped with spacer, spring, fixed block and the magnetic conductive plate that the mirror image corresponds and outside-in distributes in proper order, sets up the magnet steel on the axostylus axostyle and be located between two magnetic conductive plates.

Furthermore, the fixed block is provided with an inner positioning boss for limiting the spring between the fixed block and the positioning piece on one side facing the positioning piece.

Further, the spring is composed of an inner ring plate, three elastic ribs and an outer ring plate, the three elastic ribs are arranged between the inner ring plate and the outer ring plate, and a central hole through which the shaft rod penetrates is formed in the inner ring plate.

Further, an outer positioning groove matched with the outer positioning boss arranged on the wire frame is arranged on the outer ring plate, and an inner positioning groove matched with the inner positioning boss arranged on the fixing block is arranged on the inner ring plate.

The utility model has the beneficial effects that:

1. this two traction vibration motor of axial motion adopts brushless and commutator structure, does not exist: the problems of abrasion of the brush and the commutator, electromagnetic interference caused by commutation sparks, friction between the bearing and the shaft, abrasion and noise between parts, and the like.

2. The power supply form of the axial movement double-traction vibration motor is alternating current, various vibration experiences can be made to products through editing various different driving waveforms, and a design scheme is provided for various vibration effects.

3. This two traction vibration motors of axial motion adopts from taking spring traction damping and electromagnetic damping structure for the product can stop fast at the damping effect after the outage, thereby the fast stop of product can let the product vibration experience effect promote by a wide margin.

4. The axial movement double-traction vibration motor adopts a double-spring rotor assembly structure, and an upper spring and a lower spring are designed, so that radial vibration can be reduced when a product moves axially, collision friction sound is prevented from being generated, and the reliability of the product is improved; the spring adopts a three-elastic-rib structure with positioning mechanisms on the inner and outer diameters, the rotor can move along the axial direction most stably through the three elastic ribs, and the inner diameter and the outer diameter of the spring are provided with three positioning positions, so that the spring can be well positioned and various precision sizes can be ensured during assembly.

5. This two traction vibration motor's of axial motion stator module is through establishing the magnetism frame of a magnetic conduction material at coil outside cover for the coil is after the circular telegram, utilizes integral magnetism frame to come effectual constraint magnetic line of force, with the electromagnetic interference that improves magnetic field utilization ratio and reduce the magnetic leakage to other components.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the utility model, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded schematic view of an axial motion dual traction vibration motor of the present invention;

FIG. 2 is an assembled half-section schematic view of the axial motion dual-traction vibratory motor of the present invention;

FIG. 3 is an exploded view of the stator assembly of the axial motion dual traction vibration motor of the present invention;

FIG. 4 is an exploded view of a mover assembly of the axial motion dual-traction vibration motor of the present invention;

FIG. 5 is a schematic diagram of a spring plane structure of a mover assembly of the axial motion dual traction vibration motor of the present invention;

reference numerals: the stator assembly comprises a shell 1, a stator assembly 2, a rotor assembly 3 and an end cover 4; a magnetic frame 21, a wire frame 22, a coil 23 and a square needle 24; a split line 211, a window 212; the outer positioning boss 221, the first winding groove 222, the pinhole 223, the second winding groove 224 and the abdicating step 225; the positioning plate 31, the spring 32, the fixed block 33, the magnetic conduction plate 34, the magnetic steel 35 and the shaft lever 36; an inner ring plate 321, three elastic ribs 322, an outer ring plate 323, an outer positioning groove 324, an inner positioning groove 325 and a central hole 326; an inner positioning boss 331.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

As shown in fig. 1-2, the axial-motion double-traction vibration motor according to this embodiment includes a housing 1, a stator assembly 2, a mover assembly 3, and an end cover 4, where the housing 1 is connected to the end cover 4, the stator assembly 2 is fixed between the housing 1 and the end cover 4, the mover assembly 3 is of a double-spring structure and is disposed in the stator assembly 2 and makes an axial amplitude with respect to the stator assembly 2, and two springs 32 respectively fixed at two axial ends of the mover assembly between two axial ends of the stator assembly 2 and the housing 1 and the end cover 4. The shell 1 is used as an exterior support, and other components are assembled in the shell or connected with the shell; the end cover 4 is used as a fixed support, after the stator assembly 2 and the rotor assembly 3 are arranged in the shell 1, the end cover 4 is covered, and the end cover 4 and the shell 1 are fixed through hot riveting, so that the stator assembly 2 and the rotor assembly 3 are fully restricted in the shell 1; and the open end (towards end cover one end) section of thick bamboo wall of shell 1 is equipped with axially extended breach (unmarked) for cause the interference when avoiding installing stator module 2, corresponding end cover 4 then towards shell 1 the corresponding side be equipped with shell 1 on the riser (unmarked) of the breach looks adaptation that establishes, and the riser leaves certain interval with the breach top, play the maximum effect of closing.

Referring to fig. 3, the stator assembly 2 is an excitation source of the vibration motor, and is in a fixed state, and when an external power supply supplies power to the coil, the coil generates electromagnetic force to interact with the permanent magnet magnetic field on the mover assembly 3, so that the product moves; specifically, the stator assembly 2 is composed of a magnetic frame 21, a bobbin 22, a coil 23 and a square needle 24; the square needle 24 is fixed by interference fit with a pinhole 223 arranged on the wire frame 22, the square needle 24 is inserted into the wire frame 22, then the enameled wire is wound on the wire frame 22 to form a coil 23, and then the magnetic frame 21 is sleeved outside the coil 23. Thus, the magnetic frame 21 is sleeved outside the coil 23, when the coil 23 is electrified to generate a magnetic field, the magnetic frame 21 restrains the magnetic lines of force to be dispersed outwards, the magnetic flux leakage of a product is reduced, and the utilization rate of the magnetic field of the coil is improved; the wire frame 22 mainly plays a role in connection and support, is integrally formed through an injection mold, saves processing cost and material cost, and is provided with an outer positioning boss 221, a first winding groove 222, a needle hole 223, a second winding groove 224 and a abdicating step 225, wherein the outer positioning bosses 221 at two ends of the wire frame 22 are used for positioning an outer ring plate 323 of the spring 32 of the rotor assembly 3; two winding slots, namely a first winding slot 222 and a second winding slot 224, are used for winding the enameled wire to form the coil 23; the middle partition is provided with a pinhole 223 for installing the square needle 24 and is used for assembling the square needle 24; the magnetic frame 21 is provided with a split line 211 which axially penetrates through the magnetic frame 21 and a window 212 for exposing the square needle 24, and the magnetic frame is in a semi-closed shape, so that the magnetic frame can be conveniently sleeved outside the coil; the square needles 24 are assembled on the wire frame 22 and are arranged in three numbers, two square needles 24 on two sides are used for binding the initial end and the terminal end of the coil 23, and the middle square needle 24 is used for adjusting the winding direction; the coil 23 is wound on the bobbin 22, and the thread ends are bound on the square needles 24 at two sides, which are the excitation source of the motor, when the external power supply supplies power to the coil 23, the coil 23 generates electromagnetic force to interact with the magnetic field of the permanent magnet on the mover assembly 3, so that the product moves.

Referring to fig. 4-5, the mover assembly 3 is a moving part of the vibration motor, the permanent magnet on the mover assembly 3 generates a permanent magnetic field, and interacts with an excited electromagnetic field on the stator assembly 2, so that the mover assembly 3 moves in one direction, and when the mover assembly 3 moves to a certain amplitude, the magnetic field on the stator assembly 2 switches directions, so that the mover assembly 3 is stressed in a reverse direction and moves in the reverse direction under the traction of the spring 32, and the driving power supply is switched repeatedly, so that the mover assembly 3 moves repeatedly; when the frequency of the switching power source coincides with the natural frequency of the spring 32, the resonance point of the vibration motor, that is, the maximum vibration amount is reached. Specifically, the mover assembly 3 is composed of a positioning piece 31, a spring 32, a fixing block 33, a magnetic conductive plate 34, magnetic steel 35 and a shaft lever 36, wherein the positioning piece 31, the spring 32, the fixing block 33 and the magnetic conductive plate 34 are respectively sleeved at two axial ends of the shaft lever 36, the positioning piece 31, the spring 32, the fixing block 33 and the magnetic conductive plate 34 are in mirror image correspondence and are sequentially distributed from outside to inside, and the magnetic steel 35 is arranged on the shaft lever 36 and located between the two magnetic conductive plates 34. Thus, the shaft lever is assembled in the middle hole of the magnetic conductive plate 34, the middle hole of the magnetic steel 35 is sleeved in and fixed with the shaft lever 36, the two magnetic conductive plates 34 are assembled with the shaft lever 36 through respective middle holes, the two fixing blocks 33 are respectively installed at two ends of the shaft lever 36, the two springs 32 are respectively installed at two ends of the two fixing blocks 33, the two positioning pieces 31 are respectively installed on the two springs 32, and all materials are fixed into the mover assembly 3 into a whole by riveting the positioning pieces 31, the fixing blocks 33 and the shaft lever 36; therefore, the shaft rod plays a role in connection and support, all materials for connecting the rotor assemblies form the rotor assemblies, and the shaft rod penetrates through the materials on all the rotor assemblies, so that the concentricity of the product can be well guaranteed; the magnetic steel is a permanent magnet and generates a permanent magnetic field which interacts with an electromagnetic field generated by the stator assembly; the magnetic conduction plate changes the magnetic force line generated by the permanent magnet, and improves the utilization rate and the utilization position of the magnetic field; the fixed block is used for connecting the fixed shaft, the spring and the positioning sheet, and an inner positioning boss 331 arranged on the fixed block is used for positioning the inner ring plate 321 of the spring 32; the spring traction rotor component does reciprocating motion and comprises an inner ring plate 321, three elastic ribs 322 and an outer ring plate 323, wherein the three elastic ribs are arranged between the inner ring plate and the outer ring plate, the inner ring plate is provided with a central hole 326 through which a shaft rod penetrates, the outer ring plate is provided with an outer positioning groove 324 matched with an outer positioning boss 221 arranged on the wire frame 22, and the inner ring plate is provided with an inner positioning groove 325 matched with the inner positioning boss 331 arranged on the fixed block 33; the locating plate is used for fixing the spring and the fixing block. The fixed block, the spring realize the circumference location through the spacer that sets up on these two materials, and fixed block, spring, spacer three set up the interior location boss on the fixed block through the riveting promptly for the three compresses tightly fully fixedly. The inner ring plate of the spring is pressed and fixed with the fixed block by the positioning sheet, the outer ring plate of the spring is pressed and fixed with an inner concave table (not marked) in the shell or the end cover by the wire frame, and the power assembly vibrates in the axial direction through three elastic ribs of the spring.

The vibration motor plays a role in vibration feedback, and the working principle is as follows: when the square needle 24 of the stator component 2 supplies current, the coil 23 on the stator component 2 generates an electromagnetic field, the generated electromagnetic field interacts with a permanent magnetic field generated by the magnetic steel 35 on the rotor component 3, the rotor component 3 is pushed by axial force to move towards the axial direction through the spring 32, when the rotor component 3 moves to a certain amplitude, the current direction is changed, the stress direction of the rotor component 3 is opposite, the rotor component 3 moves towards the opposite direction of the axial direction, the switching is repeated, the rotor component 3 repeatedly reciprocates along the axial direction under the traction of the spring 32, when the current direction switching frequency is consistent with the inherent frequency of the spring 32, the maximum amplitude of the repeated movement of the rotor component 3 is reached, and the product output is large vibration quantity.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (10)

1. The axial movement double-traction vibration motor comprises a shell (1), a stator assembly (2), a rotor assembly (3) and an end cover (4), and is characterized in that the shell is connected with the end cover, the stator assembly is fixed between the shell and the end cover, the rotor assembly is of a double-spring structure and is arranged in the stator assembly and does axial amplitude relative to the stator assembly, and two springs (32) arranged on the rotor assembly are respectively fixed between the two axial ends of the stator assembly and the shell and between the two axial ends of the stator assembly and the end cover.

2. The axial motion dual traction vibration motor of claim 1, wherein the end cap is fixedly attached to the housing by heat staking.

3. The axially moving dual traction vibration motor of claim 1, wherein the stator assembly comprises a magnetic frame (21), a bobbin (22), a coil (23) and a square needle (24), the square needle is disposed on the bobbin, the coil is wound on the bobbin through the square needle, and the magnetic frame is sleeved outside the coil.

4. The axial motion dual traction vibration motor of claim 3, wherein the bobbin has first (222) and second (224) spaced apart winding slots, and wherein the partition between the first and second winding slots in the bobbin has pinholes (223) for mounting three guidelines.

5. The vibrating motor with axial motion and double traction as claimed in claim 3, wherein the wire frame is provided with a abdicating step (225) for installing the magnetic frame, the magnetic frame is provided with a split line (211) which axially penetrates through, and the magnetic frame is provided with a window (212) for exposing the guideline.

6. An axially moving dual traction vibration motor as claimed in any one of claims 3 to 5, wherein the bobbin is provided on each of its axial end faces with an outer locating boss (221) defining the spring on the respective side.

7. The axial-motion double-traction vibration motor according to claim 6, wherein the rotor assembly further comprises a positioning plate (31), a fixing block (33), magnetic conductive plates (34), magnetic steel (35) and a shaft rod (36), the positioning plate, the spring, the fixing block and the magnetic conductive plates are respectively sleeved at two axial ends of the shaft rod, the positioning plate, the spring, the fixing block and the magnetic conductive plates are respectively in mirror image correspondence and are sequentially distributed from outside to inside, and the magnetic steel is arranged on the shaft rod and between the two magnetic conductive plates.

8. The axial-motion dual traction vibration motor as claimed in claim 7, wherein the fixing block is provided at a side facing the spacer with an inner positioning boss (331) defining a spring therebetween.

9. The axial-motion double-traction vibration motor according to claim 8, wherein the spring is composed of an inner ring plate (321), three elastic ribs (322) and an outer ring plate (323), the three elastic ribs are arranged between the inner ring plate and the outer ring plate, and a central hole (326) through which the shaft rod penetrates is arranged on the inner ring plate.

10. The axially moving dual traction vibration motor as claimed in claim 9, wherein the outer ring plate is provided with an outer positioning groove (324) adapted to an outer positioning boss provided on the bobbin, and the inner ring plate is provided with an inner positioning groove (325) adapted to an inner positioning boss provided on the fixing block.

Images