CN209844810U

CN209844810U - Linear vibration motor with zigzag spring piece

Info

Publication number: CN209844810U
Application number: CN201920664393.4U
Authority: CN
Inventors: 李华京; 王磊; 张良威
Original assignee: Leading Technology (dongtai) Co Ltd
Current assignee: Leading Technology (dongtai) Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2019-12-24
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a linear vibrating motor with style of calligraphy spring leaf again, including last casing and lower casing, be provided with in last casing and the lower casing active cell assembly and with the corresponding complex stator module of active cell assembly, active cell assembly includes the quality piece, the quality piece is connected with last casing elasticity through style of calligraphy spring leaf again respectively along the both ends of X direction, style of calligraphy spring leaf includes the last elastic arm of being connected with last casing and elastic arm down and the connecting portion of being connected with the quality piece again, it is connected with connecting portion respectively with the one end that the quality piece is close to the elastic arm down to go up the elastic arm, the quality piece is provided with two locating pieces with connecting portion matched with respectively along the both ends of X direction. The utility model discloses a style of calligraphy spring leaf again, simple structure, the cost of manufacture is low, and elasticity is great, and stability is good, and the reliability is high to improved the processing procedure yield and the performance of product, the product of being convenient for carries out the volume production, has enlarged the application and the development of product.

Description

Linear vibration motor with zigzag spring piece

Technical Field

The utility model relates to the technical field of motors, especially, relate to a linear vibrating motor with style of calligraphy spring leaf again.

Background

With the rapid development of electronic products, especially mobile terminal devices such as mobile phones and tablet computers, these electronic devices basically use a vibration generating device for preventing noise from the electronic device from interfering with others. The traditional vibration generating device adopts a rotor motor based on eccentric rotation, and realizes mechanical vibration through the rotation of an eccentric vibrator, because the eccentric vibrator generates mechanical friction, electric sparks and the like in the rotating process, a commutator and an electric brush can influence the rotating speed of the eccentric vibrator, and further the vibration effect of the device is influenced, therefore, the vibration generating device adopts a linear motor with better performance.

Linear motors, also called linear motors, push rod motors, etc., the most commonly used types of linear motors are flat plate type, U-shaped slot type, and tube type, which are technologies for converting electric energy into linear motion mechanical energy, and suspend a moving element by repulsive force of a magnet, and directly drive the moving element by magnetic force, without transmission via a transmission mechanism such as a gear set, as in a rotary motor, so that the linear motor can make the moving element driven by the linear motor perform reciprocating motion of high acceleration and deceleration, and by this characteristic, the linear motor can be applied to various manufacturing and processing technical fields, and used as a driving power source or as a technical content for providing positioning. In addition, with the rapid development and strong competition of industries such as semiconductor, electronic, photoelectric, medical equipment and automation control, the requirement for linear motion performance of motors in various fields is increasing, and the motors are expected to have high speed, low noise and high positioning accuracy, so that linear motors are used in many applications to replace mechanical motion methods such as conventional servo motors.

However, some conventional linear motors have certain defects in design, so that problems of insufficient elasticity, poor stability and the like are caused, and thus the use performance of the motors is reduced, and the application and development of the motors are affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that above-mentioned current linear motor exists, provide a linear vibrating motor with style of calligraphy spring leaf again.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a linear vibrating motor with style of calligraphy spring leaf again, including upper enclosure and lower casing, be provided with the active cell subassembly in upper enclosure and the lower casing and with the corresponding complex stator module of active cell subassembly, stator module is located the below of active cell subassembly and fixes on the lower casing, the active cell subassembly includes the quality piece, the quality piece is connected with the upper enclosure elasticity through style of calligraphy spring leaf again respectively along the both ends of X direction, style of calligraphy spring leaf includes the last elastic arm of being connected with the upper enclosure and lower elastic arm and the connecting portion of being connected with the quality piece, go up the elastic arm and form bilayer structure with lower elastic arm, it is connected with the connecting portion respectively to go up the elastic arm and be close to the one end of quality piece with lower elastic arm, the quality piece is provided with two locating pieces with connecting portion matched with respectively along the both ends of X direction, connecting portion.

The utility model has the advantages that: stator module and rotor assembly interact so that the rotor assembly receives certain effort, rotor assembly's quality piece is through cooperateing with two style of calligraphy spring leafs again and vibrate along the X direction, style of calligraphy spring leaf simple structure again, and processing is convenient, the preparation background, the elastic coefficient is stable, elasticity is great, the last elastic arm of style of calligraphy spring leaf forms bilayer structure and is connected with last casing respectively with lower elastic arm again, the connecting portion of style of calligraphy spring leaf passes from between two locating pieces again and fixes a position and be connected with the quality piece, and is easy and simple to handle, good stability, the reliability is high, thereby the processing procedure yield and the performance of product have been improved, the product of being convenient for carries out the volume production, the application and the development of product have.

In some embodiments, the mass block is provided with more than three permanent magnets arranged along the X direction, the permanent magnets are magnetized along the Z direction, the magnetizing directions of the adjacent permanent magnets are opposite, the stator assembly comprises more than two coils arranged along the X direction, the current directions of the adjacent coils are opposite, the number of the coils is one less than that of the permanent magnets, one end, away from the adjacent coil, of the outer coil corresponds to one permanent magnet, one end, close to each other, of the adjacent coil corresponds to the same permanent magnet, and the coil can be connected with an external circuit through an FPC board fixed on the lower case.

In some embodiments, the mass block is provided with a plurality of first through holes matched with the permanent magnets, so that the assembly is convenient.

In some embodiments, the bottom of the mass block is provided with an avoiding groove matched with the coil, and the avoiding groove is communicated with the first through hole.

In some embodiments, two ends of the mass block along the X direction are respectively provided with a buffer device matched with the upper elastic arm and the lower elastic arm.

In some embodiments, the damping device comprises a base fixed on the mass block, and a damping block is arranged at one end of the base close to the zigzag spring piece.

In some embodiments, the material of the bumper is one of rubber, polyurethane, or foam.

In some embodiments, the ends of the upper and lower resilient arms remote from the connecting portion are each provided with a widened portion connected to the upper housing.

In some embodiments, the upper and lower resilient arms are each connected to the connecting portion by an inclined portion, and the intersection of the upper and lower resilient arms with the inclined portions is bent.

In some embodiments, the upper and lower resilient arms are each bent at an intersection with the widened portion, and the widened portion is parallel to an inner wall of the upper housing to which it is attached.

In addition, in the technical solutions of the present invention, the technical solutions can be implemented by adopting conventional means in the art, which are not specifically described.

Drawings

Fig. 1 is an exploded view of a linear vibration motor having a chevron spring lamination according to the present invention.

Fig. 2 is a cross-sectional view of the linear vibration motor with the zigzag spring piece of the present invention.

Fig. 3 is a schematic structural view of the linear vibration motor with the re-shaped spring piece after the upper housing is removed.

Fig. 4 is a front view of the spring piece with the shape of Chinese character're' of the present invention.

Fig. 5 is a side view of the re-shaped spring plate of the present invention.

The numbers in the figures indicate that the upper casing 1, the lower casing 2, the mover assembly 3, the mass block 31, the first through hole 311, the avoiding groove 312, the positioning block 32, the permanent magnet 33, the buffer device 34, the base 341, the buffer block 342, the first hole body 343, the stator assembly 4, the coil 41, the FPC board 42, the zigzag spring leaf 5, the upper elastic arm 51, the lower elastic arm 52, the connecting portion 53, the inclined portion 54, and the widening portion 55.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, it should be noted that the terms "upper", "lower", "inner", "outer", "horizontal", "vertical", "parallel", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the present invention, but do not indicate or imply that the elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention, and the terms "first" etc. are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

Example (b):

a linear vibration motor with zigzag spring pieces is shown in figures 1-5 and comprises an upper casing 1 and a lower casing 2, wherein the upper casing 1 and the lower casing 2 are generally connected in a welding mode, a rotor assembly 3 and a stator assembly 4 correspondingly matched with the rotor assembly 3 are arranged in the upper casing 1 and the lower casing 2, and the stator assembly 4 is located below the rotor assembly 3 and fixed on the lower casing 2. The mover assembly 3 includes a mass block 31, the mass block 31 is also called a balance block, a vibrating block, a balance weight, and the like, two ends of the mass block 31 along the X direction are respectively elastically connected with the upper casing 1 through a second-letter-shaped spring piece 5, the second-letter-shaped spring piece 5 includes an upper elastic arm 51, a lower elastic arm 52, and a connecting portion 53, the connecting portion 53 is connected with the mass block 31, the upper elastic arm 51 and the lower elastic arm 52 are respectively connected with the upper casing 1, a welding manner is generally adopted, the upper elastic arm 51 and the lower elastic arm 52 form a double-layer structure, one ends of the upper elastic arm 51 and the lower elastic arm 52, which are close to the mass block 31, are respectively connected with the connecting portion 53, two ends of the mass block 31 along the X direction are respectively provided with two positioning blocks 32 which are matched with the connecting portion 53, the connecting portion 53. In addition, according to the specific vibration requirement of the motor of the user, the elastic coefficient of the zigzag spring piece 5 can be adjusted by controlling the widths of the upper elastic arm 51 and the lower elastic arm 52, and the frequency of the zigzag spring piece 5 can be adjusted.

In the present invention, as shown in fig. 2, an X direction and a Z direction are given, the X direction is a vibration direction of the mover assembly 3, the Z direction is a vertical direction, the X direction and the Z direction are perpendicular to a Y direction, the X direction and the Y direction are a longitudinal direction and a transverse direction of a horizontal direction, and the "up" and the "down" in the text are all based on the Z direction.

The utility model discloses in the use, stator module 4 and 3 interact of active cell subassembly are in order to make active cell subassembly 3 receive certain effort, and active cell subassembly 3's quality piece 31 vibrates along the X direction through cooperating with two style of calligraphy spring pieces 5 again to realize the vibration of motor, style of calligraphy spring piece 5 has buffer protection's effect again, can provide certain restoring force for active cell subassembly 3's vibration. The utility model discloses a style of calligraphy spring leaf 5 again, style of calligraphy spring leaf 5 simple structure, processing is convenient, the cost of manufacture, the elastic coefficient is stable, elasticity is great, and style of calligraphy spring leaf 5's last elastic arm 51 forms bilayer structure and is connected with upper housing 1 respectively with lower elastic arm 52 again, again the connecting portion 53 of style of calligraphy spring leaf 5 pass between two locating pieces 32 and fix a position and be connected with quality piece 31, and is easy and simple to handle, be convenient for again style of calligraphy spring leaf 5 is connected with quality piece 31's location, and is good in stability, the reliability is high, thereby the processing procedure yield and the performance of product have been improved, the product of being convenient for carries out the volume production, the application and the development of.

Preferably, as shown in fig. 2 and 3, the mass block 31 is provided with more than three permanent magnets 33 arranged along the X direction, the permanent magnets 33 are magnetized along the Z direction, and the magnetizing directions of the adjacent permanent magnets 33 are opposite, the stator assembly 4 includes more than two coils 41 arranged along the X direction, the current directions of the adjacent coils 41 are opposite, the number of the coils 41 is one less than that of the permanent magnets 33, one end of the outer coil 41 far away from the adjacent coil 41 corresponds to one permanent magnet 33, the outer coil 41 is the coil 41 at two ends along the X direction, one end of the adjacent coil 41 close to each other corresponds to the same permanent magnet 33, so that the directions of ampere force received by each coil 41 are the same, and the directions of the reaction force received by each permanent magnet 33 are the same, so that the rotor assembly 3 can vibrate better along the X direction, and is more stable and reliable, the coil 41 is connected to an external circuit through an FPC board 42, the FPC board 42 is fixed to the lower housing 2, and the number of the coil 41 and the permanent magnet 33 is determined according to the size of the motor or the like.

When the motor is used, an external circuit supplies power to the coil 41 through the FPC board 42, the electrified coil 41 receives ampere force in a magnetic field generated by the permanent magnet 33, and the coil 41 is fixed, so that the permanent magnet 33 receives corresponding reaction force, the mover assembly 3 vibrates in the X direction, the motor vibration is realized, the frequency and the amplitude of the vibration of the mover assembly 3 can be changed by adjusting the current waveform of the coil 41, different vibration senses can be generated, the vibration senses are rich, various different tactile feedbacks are realized, the motor is convenient to apply to a power source of the tactile feedbacks of intelligent equipment, and the application range of the motor is enlarged. In addition, the width of the outer permanent magnet 33 in the X direction is half of the width of the other permanent magnets 33 in the X direction, and the outer permanent magnets 33 are the permanent magnets 33 at both ends in the X direction, so that the magnetic field effect received by both ends of each coil 41 can be ensured to be the same.

In addition, the FPC board 42, that is, a Flexible Printed Circuit (FPC), is a Printed Circuit board having high reliability and excellent flexibility, which is made of a polyimide or polyester film as a base material, and has the characteristics of high wiring density, light weight, thin thickness, and good bending property; the permanent magnet 33 is a magnet capable of retaining high remanence for a long time in an open circuit state, and is also called a hard magnet, for example, a permanent magnet made of a ferrite permanent magnet material or a magnetic steel is preferred, the magnetic steel has the characteristics of high hardness, high coercive force value, high temperature resistance, strong corrosion resistance and the like, has good permanent magnetic properties, and can still maintain strong and stable magnetism for a long time after an external magnetic field is removed after being magnetized by saturation.

Preferably, as shown in fig. 1 to 3, the mass block 31 is provided with a plurality of first through holes 311 matched with the permanent magnets 33, the number of the first through holes 311 is the same as that of the permanent magnets 33, the permanent magnets 33 are arranged in the first through holes 311, and generally, an adhesive manner is adopted, so that the assembly is convenient, the structure is compact, and the stability is good.

Preferably, as shown in fig. 1 to 3, the bottom of the mass block 31 is provided with an avoiding groove 312 matched with the coil 41, the avoiding groove 312 is communicated with the first through hole 311, and all the coils 41 are always located in the avoiding groove 312 in the vibration process of the mass block 31, so that the structure is more compact, and the stability and the reliability are better.

Preferably, as shown in fig. 2 and 3, two ends of the mass 31 in the X direction are respectively provided with a buffer device 34 cooperating with the upper elastic arm 51 and the lower elastic arm 52, during the vibration of the mass 31, the upper elastic arm 51 and the lower elastic arm 52 respectively use the buffer device 34, and the buffer device 34 can prevent the mass 31 from directly touching the upper elastic arm 51 and the lower elastic arm 52 of the zigzag spring piece 5, thereby playing a role of buffer protection and being safer and more reliable. Specifically, the damping device 34 includes a base 341, the base 341 is fixed on the mass block 31, one end of the base 341 close to the zigzag spring piece 5 is provided with a damping block 342, a first hole 343 for installing the damping block 342 is generally provided on the base 341, the first hole 343 may be a through hole or a blind hole, etc., the damping block 342 generally employs an elastic material, the base 341 is convenient to be connected with the mass block 31 and install the damping block 342, the damping block 342 may play a role in damping protection for the mass block 31 and the zigzag spring piece 5, thereby being safer and more reliable. In addition, the mass block 31 can be further provided with a positioning groove matched with the base 341, so that the base 341 is connected with the mass block 31 more stably and firmly, and the stability and the reliability are higher.

Preferably, the material of the buffer block 342 is one of rubber, polyurethane or foam, the rubber has the advantages of good elasticity, high strength, low price and the like, the polyurethane has the advantages of higher flexibility, rebound resilience, mechanical strength, oxidation stability, excellent oil resistance and the like, and the foam has the advantages of elasticity, light weight, quick pressure-sensitive fixation, convenient use, free bending, ultrathin volume, reliable performance and the like.

Preferably, as shown in fig. 2 to 5, the ends of the upper elastic arm 51 and the lower elastic arm 52 away from the connecting portion 53 are respectively provided with a widened portion 55 connected with the upper housing 1, the widened portions 55 facilitate the welding connection of the zigzag spring piece 5 and the upper housing 1, and the strength after the connection is high.

Preferably, as shown in fig. 2 to 5, the upper elastic arm 51 and the lower elastic arm 52 are respectively connected to the connecting portion 53 through the inclined portion 54, and the intersection of the upper elastic arm 51 and the lower elastic arm 52 with the inclined portion 54 is bent, so that the inclined portion 54 corresponds to a portion of the elastic arm, that is, the two inclined portions 54 respectively form elastic portions with the upper elastic arm 51 and the lower elastic arm 52, thereby increasing the elastic coefficient and increasing the elastic force.

Preferably, as shown in fig. 2 to 5, the intersections of the upper elastic arm 51 and the lower elastic arm 52 and the widened portion 55 are respectively bent, and the widened portion 55 is parallel to the inner wall of the upper housing 1 connected thereto, so that the welding connection between the zigzag spring piece 5 and the upper housing 1 is facilitated, the volume of the spring piece is facilitated to be controlled, the elastic force is improved, and the stability and reliability are improved. Further, the buffer block 342 of the buffer device 34 corresponds to the widened portion 55 of the zigzag spring piece 5, which is more convenient to operate.

The foregoing description is only illustrative of some embodiments of the present invention, and it should be understood that modifications and substitutions can be made by those skilled in the art without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of the appended claims. In this case all the details may be replaced with equivalent elements, and the materials, shapes and dimensions may be any.

Claims

1. The linear vibration motor with the zigzag spring pieces is characterized by comprising an upper machine shell (1) and a lower machine shell (2), wherein a rotor assembly (3) and a stator assembly (4) correspondingly matched with the rotor assembly (3) are arranged in the upper machine shell (1) and the lower machine shell (2), the stator assembly (4) is positioned below the rotor assembly (3) and fixed on the lower machine shell (2), the rotor assembly (3) comprises a mass block (31), two ends of the mass block (31) along the X direction are respectively and elastically connected with the upper machine shell (1) through the zigzag spring pieces (5), the zigzag spring pieces (5) comprise an upper elastic arm (51) and a lower elastic arm (52) connected with the upper machine shell (1) and a connecting part (53) connected with the mass block (31), and the upper elastic arm (51) and the lower elastic arm (52) form a double-layer structure, go up elastic arm (51) with elastic arm (52) down are close to the one end of quality piece (31) respectively with connecting portion (53) are connected, quality piece (31) along the both ends of X direction be provided with respectively with connecting portion (53) matched with two locating piece (32), connecting portion (53) can follow two pass between locating piece (32) and fix a position.

2. A linear vibration motor having a zigzag spring piece according to claim 1, more than three permanent magnets (33) arranged along the X direction are arranged on the mass block (31), the permanent magnets (33) are magnetized along the Z direction, the magnetizing directions of the adjacent permanent magnets (33) are opposite, the stator component (4) comprises more than two coils (41) which are arranged along the X direction, the current directions of the adjacent coils (41) are opposite, the number of the coils (41) is one less than that of the permanent magnets (33), one end, far away from the adjacent coil (41), of the outer coil (41) corresponds to one permanent magnet (33), one end, close to each other, of the adjacent coil (41) corresponds to the same permanent magnet (33), the coil (41) can be connected to an external circuit through an FPC board (42) fixed to the lower case (2).

3. A linear vibration motor having a zigzag spring plate according to claim 2, wherein said mass block (31) is provided with a plurality of first through holes (311) which are engaged with said permanent magnets (33).

4. A linear vibration motor having a zigzag spring plate according to claim 3, wherein the bottom of said mass (31) is provided with an avoiding groove (312) fitted to said coil (41), said avoiding groove (312) communicating with said first through hole (311).

5. A linear vibration motor having a zigzag spring plate according to claim 1, wherein both ends of said mass (31) in the X direction are provided with a buffer device (34) which is engaged with said upper elastic arm (51) and said lower elastic arm (52), respectively.

6. A linear vibration motor having a zigzag spring plate according to claim 5, wherein said damper (34) comprises a base (341), said base (341) being fixed to said mass (31), and a damper (342) is provided at an end of said base (341) adjacent to said zigzag spring plate (5).

7. The linear vibration motor having a chevron-shaped spring plate as claimed in claim 6, characterized in that the material of said buffer block (342) is one of rubber, polyurethane or foam.

8. A linear vibration motor having a zigzag spring plate according to any one of claims 1 to 7, wherein ends of said upper elastic arm (51) and said lower elastic arm (52) remote from said connecting portion (53) are respectively provided with a widened portion (55) connected to said upper housing (1).

9. A linear vibration motor having a zigzag spring piece according to claim 8, wherein said upper elastic arm (51) and said lower elastic arm (52) are connected to said connecting portion (53) by inclined portions (54), respectively, and the intersections of said upper elastic arm (51) and said lower elastic arm (52) with said inclined portions (54), respectively, are bent.

10. A linear vibration motor having a zigzag spring plate according to claim 8, wherein the intersections of said upper elastic arm (51) and said lower elastic arm (52) with said widened portions (55), respectively, are bent, and said widened portions (55) are parallel to the inner wall of said upper casing (1) to which they are connected.