Linear motor with U-shaped elastic damping piece

Abstract

The utility model relates to the technical field of linear motors, in particular to a linear motor with a U-shaped elastic damping piece, which comprises a stator and a rotor which are connected through the U-shaped elastic damping piece, the U-shaped elastic damping piece comprises a middle arc-shaped part and extension parts connected to two sides of the arc-shaped part, the arc-shaped part forms a slot in the Z direction, and the slot is communicated with the stator and the rotor through the U-shaped elastic damping piece. The extending parts extend towards the side away from the arc-shaped part in the X direction, the extending part on one side is connected with the stator, the extending part on the other side is connected with the rotor, the depth of the arc-shaped part in the Z direction is larger than the width of the arc-shaped part in the X direction, and the thickness of the arc-shaped part is smaller than or equal to the thickness of the extending part. The structure is simple, the assembly process is simple, convenient and rapid, the production cost is effectively reduced, the cost performance of the product is improved, and a preferable scheme for pursuing perfect combination of high efficiency and low cost is provided; according to the linear motor with the U-shaped elastic damping piece, the purpose of increasing the frequency band can be achieved without additional foam for adding damping.

Description

Technical Field

[0001] The utility model relates to the technical field of linear motors, in particular to a linear motor with a U-shaped elastic damping member. Background Art

[0002] In current touch-screen consumer electronic products such as mobile phones, PADs, and handheld game consoles, linear motors are usually used for vibration and haptic feedback devices. The linear motor provides elasticity through metal shrapnel, and damping is provided by inserting foam between the shrapnel and the stator and the mover. Glue is applied at the intersection of the foam and the stator and the mover to prevent the foam from falling off during vibration. This process is complex and costly.

[0003] Linear motors are widely used in consumer electronics. It is necessary to provide a linear motor solution with simple process and lower cost. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a linear motor with a U-shaped elastic damping member is provided.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a linear motor with a U-shaped elastic damping member, including a stator and a mover connected by a U-shaped elastic damping member.

[0006] The U-shaped elastic damping member includes an arc portion in the middle and extension portions connected to both sides of the arc portion. A slot is formed in the arc portion in the Z direction, and the extension portions extend away from the arc portion in the X direction. One side of the extension portion is connected to the stator, and the other side of the extension portion is connected to the mover.

[0007] The depth of the arc portion in the Z direction > the width of the arc portion in the X direction, that is, the arc portion is designed into a U-shaped structure with a larger depth, ensuring that the material can absorb and dissipate vibration energy to the greatest extent in the Z direction, effectively suppressing the vibration of the motor in the Z direction.

[0008] The thickness of the arc portion ≤ the thickness of the extension portion. Specifically, the extension portion is thickened to enhance its structural stability and damping effect, while the arc portion is relatively thinned to minimize the resistance to movement in the X direction while ensuring the necessary elasticity, thereby ensuring the smooth movement of the system in the X direction.

[0009] Furthermore, the U-shaped elastic damping member adopts a strip structure, including two strips symmetrically arranged about the axis of symmetry in the X direction.

[0010] Among them, by changing the material and thickness of the U-shaped elastic damping member, the resonance point required by the motor can be conveniently adjusted.

[0011] Further, the stator includes a coil and a bracket, and the coil is located between the brackets on both sides.

[0012] The rotor includes a magnetic circuit, a mass block, and a cover plate. The magnetic circuit and the mass block are arranged below the cover plate, and the magnetic circuit is located between the mass blocks on both sides.

[0013] The extension connecting the stator is connected to the end face of the bracket far from the base.

[0014] The upper and lower end faces of the extension connecting the rotor are respectively connected to the cover plate and the mass block, and the outer side face of the extension connecting the rotor is connected to the magnetic circuit.

[0015] The above structure is compact and efficient. Among them, the stator can be directly and firmly pasted on the PCB board to be vibrated (such as a mobile phone screen, a touch panel, etc.) through glue, and the rotor is accurately placed thereon, without complex positioning, greatly simplifying the installation process. The overall structure is ingeniously designed and highly integrated. It is only composed of the height of the magnetic circuit and the height of the voice coil inside, so that the total height can be significantly reduced, meeting the application scenarios with strict space requirements.

[0016] Preferably, the coil and the bracket are fixed on the base to form an integral body. During installation, the formed linear motor as a module is easy to assemble.

[0017] Further, the coil is located below the magnetic circuit.

[0018] Further, the magnetic circuit includes several magnetic steels arranged side by side.

[0019] Specifically, the U-shaped elastic damping member can be made of rubber material, can be made of silica gel material, can also be other elastic damping materials or high-analysis elastic materials, and can also be a composite material with glue such as Peek / TPE / PU;

[0020] Glue materials with a smaller Young's modulus and poor fluidity can be poured into the slots in the arc part to further increase the damping;

[0021] Thin glue / lacquer or plating with a larger Young's modulus can be brushed on the straight edge of the arc part to further suppress the vibration in the Z direction.

[0022] The beneficial effects of the present invention are: The structure of the present invention is concise, and the assembly process is simple and fast, effectively reducing the production cost and improving the product cost performance. It is an optimal solution that pursues the perfect combination of high performance and low cost.

[0023] The linear motor with a U-shaped elastic damping member of the present invention can achieve the purpose of increasing the frequency band without adding additional foam for damping. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is the structural schematic diagram of the present invention;

[0026] Figure 2 is the cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0027] Figure 3 is the cross-sectional schematic diagram of Embodiment 2 of the present invention;

[0028] Figure 4 is the impedance curve diagram of a conventional linear motor and Embodiment 1.

[0029] Reference numerals in the figure: 1 - coil, 2 - base, 3 - bracket, 4 - magnetic circuit, 5 - mass block, 6 - cover plate, 7 - U-shaped elastic damper, 71 - arc portion, 72 - extension portion. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] Figure 1 and Figure 2 A linear motor with a U-shaped elastic damper as shown includes a stator and a rotor connected by a U-shaped elastic damper 7.

[0033] The U-shaped elastic damper 7 includes an arc portion 71 in the middle and extension portions 72 connected to both sides of the arc portion 71. The arc portion 71 forms a slot in the Z direction, and the extension portions 72 extend away from the arc portion 71 in the X direction. One extension portion 72 is connected to the stator, and the other extension portion 72 is connected to the rotor.

[0034] The depth of the arc portion 71 in the Z direction > the width of the arc portion 71 in the X direction.

[0035] The thickness of the arc portion 71 ≤ the thickness of the extension portion 72.

[0036] The U-shaped elastic damping member 7 adopts a strip structure and includes two strips symmetrically arranged about the axis of symmetry in the X direction.

[0037] The stator includes a coil 1 and a bracket 3. The coil 1 is located between the brackets 3 on both sides.

[0038] The rotor includes a magnetic circuit, a mass block 5 and a cover plate 6. The magnetic circuit and the mass block 5 are arranged below the cover plate 6, and the magnetic circuit is located between the mass blocks 5 on both sides.

[0039] The extension part 72 connecting the stator is connected to one side end face of the bracket 3.

[0040] The upper and lower end faces of the extension part 72 connecting the rotor are respectively connected to the cover plate 6 and the mass block 5, and the outer side face of the extension part 72 connecting the rotor is connected to the magnetic circuit.

[0041] The coil 1 is located below the magnetic circuit.

[0042] The magnetic circuit includes several magnetic steels 4 arranged side by side.

[0043] As Figure 4 shown, compared with the conventional linear motor, the linear motor with a U-shaped elastic damping member in this application has a wider frequency band.

[0044] During installation, the stator can be directly and firmly pasted onto the vibrating PCB board such as a mobile phone screen, a touch panel, etc. with glue, and the rotor is accurately placed thereon, without complex positioning, greatly simplifying the installation process.

[0045] Embodiment 2

[0046] The difference from Embodiment 1 is that the coil 1 and the bracket 3 are fixed to the base 2.

[0047] During installation, the linear motor is directly and firmly pasted onto the vibrating PCB board such as a mobile phone screen, a touch panel, etc. as a module with glue.

[0048] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A linear motor with a U-shaped elastic damping member, characterized in that: It comprises a stator and a mover connected by a U-shaped elastic damping member (7), The U-shaped elastic damping member (7) comprises a middle arc-shaped portion (71) and extension portions (72) connected to both sides of the arc-shaped portion (71); the arc-shaped portion (71) forms a slot in the Z direction; the extension portion (72) extends in the X direction to a side away from the arc-shaped portion (71); the extension portion (72) on one side is connected to the stator, and the extension portion (72) on the other side is connected to the mover. The depth of the arc-shaped portion (71) in the Z direction is greater than the width of the arc-shaped portion (71) in the X direction. The thickness of the arc-shaped portion (71) is less than or equal to the thickness of the extending portion (72).

2. A linear motor with a U-shaped elastic damping member according to claim 1, characterized in that: The U-shaped elastic damping member (7) adopts a strip structure, including two strips symmetrically arranged along the symmetry axis in the X direction.

3. A linear motor with a U-shaped elastic damping member according to claim 1, characterized in that: The stator comprises a coil (1) and a bracket (3), wherein the coil (1) is located between the brackets (3) on both sides. The mover comprises a magnetic circuit, a mass block (5) and a cover plate (6); the magnetic circuit and the mass block (5) are arranged below the cover plate (6); the magnetic circuit is located between the mass blocks (5) on both sides; The extension part (72) connected to the stator is connected to one end surface of the bracket (3). The upper and lower end surfaces of the extension part (72) connecting the mover are respectively connected to the cover plate (6) and the mass block (5), and the outer side surface of the extension part (72) connecting the mover is connected to the magnetic circuit.

4. A linear motor with a U-shaped elastic damping member according to claim 3, characterized in that: The coil (1) is located below the magnetic circuit.

5. A linear motor with a U-shaped elastic damping member according to claim 3, characterized in that: The magnetic circuit comprises several magnetic steels (4) arranged side by side.

6. A linear motor with a U-shaped elastic damping member according to claim 3, characterized in that: The coil (1) and the bracket (3) are fixed on the base (2).

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