Flat linear vibration motor

Abstract

The utility model discloses a kind of flat linear vibration motors, including shell, stator and mover, the mover is slidably installed in the inside of the shell, the stator is constituted by several groups of magnetic yoke body and field coil, it is arranged in the shell interior along straight line, the both ends of the shell are equipped with end seal plate, and the inside of end seal plate is arranged elastic member for buffering;Mover includes slide and counterweight ear, slide both ends are equipped with slide pin and cooperate shell sliding slot guiding sliding, slide surface is embedded with multiple shielding sleeves, permanent magnet is arranged in shielding sleeve, multiple permanent magnets are arranged in straight line and penetrate slide. By field coil energization forms alternating magnetic field and acts on permanent magnet, realizes the linear reciprocating motion of mover in shell. The structure has the advantages of fast response, stable operation, convenient installation, high magnetic circuit efficiency, suitable for small vibration equipment and precision driving system.

Description

Technical Field

[0001] This utility model relates to the field of vibration motor technology, specifically a flat linear vibration motor. Background Technology

[0002] Linear vibration motors, as miniature drive devices that convert electrical energy into mechanical vibration output along a linear direction, are widely used in smart wearable devices, portable terminals, haptic feedback systems, and precision feeding devices. These motors typically achieve reciprocating linear drive through the magnetic field interaction between a permanent magnet actuator and an excitation coil, and are characterized by fast response, compact structure, and high energy efficiency.

[0003] In existing typical linear vibratory motor structures, the mover is often composed of permanent magnets, and its motion is driven by an alternating magnetic field generated by linearly arranged stator coils. In structural design, guide rails or sliding grooves are often used for mechanical limiting to control the mover's running path. However, due to issues with machining accuracy or assembly tolerances, the mover is prone to wobbling or jamming, resulting in insufficient motion stability. Furthermore, to simplify manufacturing processes, some designs omit vibration shock buffer structures, causing the mover to experience severe impacts when reaching its end, which not only affects its service life but also increases system noise.

[0004] On the other hand, in order to improve magnetic circuit efficiency, some products have attempted to adopt U-shaped magnetic yokes or closed magnetic flux channel structures. However, due to asymmetrical excitation coil layout or unreasonable magnetic pole arrangement, the magnetic field concentration is not high, resulting in weak electromagnetic driving force or deviation in driving direction, which seriously affects vibration performance and energy consumption ratio. At the same time, if the mass distribution of the mover is uneven, problems such as swaying and deviation are prone to occur during high-speed operation, further reducing the vibration consistency of the system.

[0005] In addition, many existing vibration motors lack standardized installation structures during equipment integration, requiring users to additionally process the fixing base, which not only increases the difficulty of installation but also limits the modular application capability of the product.

[0006] In summary, existing technologies still have significant shortcomings in terms of electromagnetic driving force strength, electromagnetic interference suppression, mover guidance stability, end buffer protection, and equipment installation adaptability. There is an urgent need to propose a flat linear vibration motor with a more optimized structure, more precise response, and stronger adaptability to meet practical application requirements. Utility Model Content

[0007] This invention proposes a flat linear vibration motor, which aims to improve driving efficiency and reliability through structural optimization and component configuration, and adapt to the linear drive requirements in high-performance and miniaturized scenarios.

[0008] This utility model provides a flat linear vibration motor, including a housing, a stator and a mover. The mover is slidably installed in the internal space of the housing. The stator is composed of several units and arranged in a straight line inside the housing to generate an alternating magnetic field to drive the mover to move.

[0009] In a preferred embodiment, the housing is further configured such that end sealing plates are fixedly installed at both ends, and elastic elements are provided on the inner side of the end sealing plates to form an elastic buffer for the moving part, preventing it from impacting at the extreme displacement, thereby improving the service life and operational stability of the equipment.

[0010] In a preferred embodiment, the mover is further configured as follows: the mover includes a sliding plate and counterweight ears disposed on both sides of the sliding plate; sliding pins are respectively disposed at the upper and lower ends of the sliding plate, and cooperate with the sliding grooves disposed on the inner wall of the housing to achieve guided sliding and avoid lateral displacement deviation. The surface of the sliding plate is provided with several embedded shielding sleeves, and permanent magnets are fixed inside the shielding sleeves; the multiple permanent magnets are arranged in a straight line on the surface of the sliding plate, and their two ends penetrate the surface of the sliding plate to enhance the magnetic field strength.

[0011] Specifically, through the above structural configuration, the mover achieves periodic linear vibration under the action of the alternating magnetic field generated by the stator. The shielding sleeve can effectively suppress magnetic field interference, and the permanent magnet and the stator magnetic circuit form a high-efficiency working zone, thereby improving the vibration response speed and energy efficiency ratio.

[0012] In a preferred embodiment, the stator is further configured as follows: the stator includes a magnetic yoke and two sets of excitation coils disposed on the surface of the magnetic yoke. The magnetic yoke has a U-shaped structure and is made of ferromagnetic material. The two excitation coils are symmetrically distributed on both sides of the slide plate and generate magnetic fields of opposite polarities by winding in opposite directions, thereby enabling the mover to be controlled under the action of bidirectional magnetic force.

[0013] Specifically, this configuration utilizes a U-shaped magnetic yoke to form a closed magnetic circuit, which significantly improves the magnetic field strength and magnetic energy utilization. Combined with the symmetrical excitation coil design, it helps to generate a balanced electromagnetic driving force, thereby improving the stability and response accuracy of the mover motion.

[0014] In a preferred embodiment, the housing is further configured such that a fixing lug is provided at the bottom of the housing, which is used to achieve precise positioning and stable installation of the housing on an external platform or equipment structure.

[0015] Specifically, this structure simplifies the motor integration process, facilitates rapid deployment in various electronic modules or mechanical devices, and improves the assembly efficiency and stability of the equipment.

[0016] In a preferred example, the counterweight lugs are further configured such that they are fixedly mounted on both sides of the slide plate, and the slide plate, counterweight lugs and elastic elements are located on the same plane, which helps to maintain the center of gravity symmetry and mechanical balance during the movement of the mover.

[0017] Specifically, this counterweight structure can effectively reduce vibration offset or tilting problems, and improve the system's linear response and dynamic stability.

[0018] In summary, this utility model, through magnetic circuit structure optimization, mover guiding sliding design, symmetrical coil arrangement and vibration buffer structure integration, not only achieves efficient driving function of miniaturized flat linear vibration motor, but also improves the reliability, responsiveness and adaptability of the overall structure, and has good application and promotion prospects.

[0019] The beneficial effects achieved by this utility model are as follows:

[0020] 1. In this utility model, a closed magnetic circuit is formed by a U-shaped magnetic yoke and symmetrically wound excitation coils. Combined with the linear arrangement of permanent magnets and shielding sleeves, the electromagnetic driving force and anti-interference performance are effectively enhanced, enabling the mover to achieve stable and fast-responding linear reciprocating motion within the housing, thereby improving the accuracy and reliability of vibration output.

[0021] 2. In this utility model, the movement path of the moving part is controlled by the sliding pin guide and the sliding groove structure. Combined with the elastic buffer design and symmetrical counterweight structure in the end sealing plate, the movement is stable and impact and sway are avoided. At the same time, the housing is provided with fixing ears, which facilitates integration and installation in various devices, thereby enhancing the system's adaptability and durability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0023] Figure 2 This is a schematic cross-sectional view of the shell structure according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the housing according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the moving part structure according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the stator structure according to an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Housing; 110. End cap; 101. Fixing lug; 111. Elastic element;

[0029] 200. Stator; 210. Magnetic yoke; 220. Excitation coil;

[0030] 300. Moving element; 310. Slide plate; 320. Counterweight lug; 311. Permanent magnet; 312. Shielding sleeve; 313. Sliding pin. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0032] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0033] The following describes, with reference to the accompanying drawings, some embodiments of a flat linear vibration motor provided by this utility model.

[0034] Combination Figures 1-5 As shown, the present invention provides a flat linear vibration motor, including a housing 100, a stator 200, and a mover 300 slidably mounted inside the housing 100.

[0035] The housing 100 has a hollow structure, with end sealing plates 110 fixedly installed at its two ends. An elastic element 111 is provided on one side of the end sealing plate 110, located inside the housing 100, to provide elastic cushioning for the reciprocating motion of the mover 300. A fixing lug 101 is also fixedly installed at the bottom of the housing 100. The fixing lug 101 is used to achieve stable positioning of the present invention on an external mounting platform, facilitating equipment integration and installation.

[0036] The stator 200 is a plurality of stators, which are evenly distributed in a linear array within the interior space of the housing 100. Each stator 200 includes a yoke 210 and an excitation coil 220. The yoke 210 has a U-shaped structure and is made of ferromagnetic material to form a magnetic circuit channel and increase the magnetic flux density. Two sets of excitation coils 220 are fixed on the surface of each yoke 210. The two sets of excitation coils 220 are wound on the yoke 210 in opposite directions. When energized, they can generate electromagnetic fields in opposite directions on the left and right sides, enabling the mover 300 to achieve bidirectional drive under the action of magnetic force.

[0037] The mover 300 is slidably disposed inside the housing 100, and includes a slide plate 310 and counterweight ears 320 fixed on both sides of the slide plate 310. The slide plate 310 has a long strip structure, and each of its upper and lower ends is provided with a sliding pin 313. The sliding pin 313 cooperates with the sliding groove opened in the inner wall of the housing 100, so that the slide plate 310 can slide back and forth in a straight line in the sliding groove, while ensuring the guiding accuracy and stability during the sliding process.

[0038] Multiple shielding sleeves 312 are embedded and installed on the surface of the slide plate 310, and permanent magnets 311 are fixedly installed inside the shielding sleeves 312. The permanent magnets 311 are elongated magnets arranged in a straight line along the length of the slide plate 310, and their two ends penetrate the surface of the slide plate 310, so that the magnetic lines of force are perpendicular to the surface of the slide plate 310 and facing the working surface of the magnetic yoke 210, thereby ensuring the formation of a stable magnetic field interaction area with the stator 200. The multiple permanent magnets 311 interact with the alternating magnetic field generated by the excitation coil 220 in the stator 200, driving the mover 300 to produce periodic reciprocating motion in the linear direction.

[0039] The counterweight lugs 320 are fixed to both sides of the slide plate 310, so that the center of gravity of the mover 300 is symmetrically distributed. The counterweight lugs 320, the slide plate 310 and the elastic element 111 provided on the inner side of the end cap 110 are located on the same horizontal plane, ensuring that the mover 300 is subjected to balanced force during reciprocating motion, and improving the consistency and stability of vibration response.

[0040] In practical applications, users can supply alternating currents of different phases to each group of excitation coils 220 via the power control module, forming a dynamic magnetic field that acts on the mover 300, causing it to be driven by periodic magnetic force, thereby driving the slide plate 310 and its upper structure to produce controllable vibration in the linear direction. This utility model has a compact structure and fast response, and is suitable for various scenarios such as precision vibration platforms and vibration feeding systems.

[0041] Working principle and usage process of this utility model:

[0042] When an alternating current is applied to the excitation coil 220, an alternating electromagnetic field is formed. This electromagnetic field acts on the permanent magnets 311 on the slide plate 310. Under the action of the electromagnetic force, the mover 300, i.e., the slide plate 310, reciprocates along a straight line. Since the permanent magnets 311 are multiple and arranged in a straight line, with both ends penetrating the surface of the slide plate 310, they form a multi-point force-bearing interaction with the stator 200, thereby improving the stability and response speed of the linear drive.

[0043] The linear reciprocating sliding of the mover 300 is guided by a sliding pin 313 located inside the housing 100. The sliding pin 313, in conjunction with the sliding groove, achieves stable motion path control, preventing deviation and jamming. At the same time, the end plate 110 and the elastic element 111 therein provide elastic buffering for the mover 300 at extreme positions, reducing impact and extending service life.

[0044] The structural design of this utility model forms a closed magnetic circuit through the U-shaped magnetic yoke 210 and the symmetrically arranged excitation coils 220, and is combined with the linearly arranged permanent magnets 311 to achieve efficient driving. At the same time, the mass distribution of the mover 300 is adjusted by the counterweight lugs 320, which effectively improves the balance and directional stability of the vibration output. It is suitable for application scenarios with high requirements for vibration accuracy and response speed.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flat linear vibration motor, characterized by, include: The housing (100), stator (200), and mover (300) slidably mounted inside the housing (100) are provided. The number of stators (200) is several and arranged in a straight line inside the housing (100). End caps (110) are fixedly mounted on both sides of the housing (100), and one side of each end cap (110) has an elastic element (111) located inside the housing (100). The mover (300) includes a sliding plate (310) and a component fixed to the sliding plate (310). The slide plate (310) has counterweight ears (320) on both sides. Several shielding sleeves (312) are embedded in the surface of the slide plate (310), and permanent magnets (311) are fixedly sleeved on the inner side of the shielding sleeves (312). Permanent magnets (311) are provided at both ends of the slide plate (310). The stator (200) includes a magnetic yoke (210) and two sets of excitation coils (220) fixed on the surface of the magnetic yoke (210). The two excitation coils (220) are symmetrically arranged on both sides of the slide plate (310).

2. The flat linear vibration motor according to claim 1, characterized by The bottom end of the housing (100) is fixedly equipped with a fixing ear (101) for positioning the housing (100).

3. The flat linear vibration motor according to claim 1, wherein The inner side of the housing (100) is provided with a groove for guiding the sliding pin (313) to slide. The upper and lower ends of the sliding plate (310) are slidably arranged on the inner side of the housing (100) through the sliding pin (313). Several balls are embedded in the surface of the permanent magnet (311).

4. The flat linear vibration motor according to claim 1, wherein The counterweight lugs (320) are fixed to both sides of the slide plate (310), and the slide plate (310), counterweight lugs (320) and elastic element (111) are located in the same plane.

5. The flat linear vibration motor according to claim 1, wherein The permanent magnets (311) are arranged in a straight line on the surface of the slide plate (310), and the two ends of the permanent magnets (311) penetrate the surface of the slide plate (310). The two magnetic poles of the slide plate (310) are perpendicular to the surface of the slide plate (310) and face the surface of the magnetic yoke (210).

6. The flat linear vibration motor according to claim 1, wherein The magnetic yoke (210) is U-shaped and is made of ferromagnetic material.

7. The flat linear vibration motor according to claim 1, wherein Two excitation coils (220) are wound in opposite directions on the surface of each of the magnetic yokes (210) to generate two electromagnetic fields with opposite magnetic poles on both sides of the slide plate (310).

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