Transverse linear motor structure

Abstract

This invention relates to a transverse linear motor structure, comprising a lower housing, an upper housing, a weight component, and spring contacts. The weight component includes a magnetic groove assembly, which comprises a mass block, a first magnetic guide plate, and a second magnetic guide plate. Mass blocks are symmetrically fixed to both sides of the second magnetic guide plate, forming a rectangular magnetic groove structure with an open bottom. Magnets are fixed within this magnetic groove. The first magnetic guide plate is welded to the upper surface of both the mass block and the second magnetic guide plate. Spring contacts are connected to the sidewalls of the mass blocks on both sides of the weight component to form oscillators. The weight component is connected to the upper housing via these spring contacts, and the upper and lower housings cooperate to form a closed cavity. This invention, through the rectangular magnetic groove structure of the magnetic groove assembly, the optimization of the spring contact structure, and the inclusion of cushioning foam, effectively shields magnetic leakage in all directions, improving the lifespan of the spring contacts and the mechanical reliability of the product.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetics and vibration dynamics, and relates to feedback function devices for VR / AR, automotive central control displays, game controllers and automotive steering wheels, especially a transverse linear motor structure. Background Technology

[0002] As an industry trend in existing linear motors, "wideband" technology is increasingly being used in fields that require vibration feedback, such as VR / AR, car steering wheels, and game controllers. At the same time, end products also require a greater vibration experience. Currently, wideband operation is mainly achieved by using a magnetically conductive housing to increase the utilization rate of magnetic field lines and improve driving force. However, this structure often results in uneven force distribution during product vibration due to different static magnetic attraction forces of the magnet on the upper and lower housings or the upper and lower magnetic conductors at different displacements. This leads to polarization and poor noise performance. In addition, the complex magnetic circuit structure increases the cost of mold opening and repair. Furthermore, most linear motors with transverse vibration use a single-vibration-arm "Z"-shaped spring structure. However, the existing traditional single-vibration-arm "Z"-shaped springs often bend and deform during directional drop due to excessive instantaneous impulse, causing mechanical failure of the product. Secondly, magnetic leakage along the vibration direction often affects the absolute K value of the vibration system, thus affecting the product's natural frequency. At the same time, the static magnetic attraction force of the magnet on the spring caused by magnetic leakage affects the stress concentration during the spring vibration process, thereby reducing the lifespan of the spring. In addition, the bending point of the single vibration arm often comes into contact with the contact plane, resulting in poor noise during product vibration. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transverse linear motor structure that is novel in structure, prevents magnetic leakage, extends the service life of the spring, and improves the mechanical reliability of the product.

[0004] The technical problem solved by this invention is achieved through the following technical solution:

[0005] A transverse linear motor structure includes a lower housing, an upper housing, a circuit board, a coil, a weight portion, and spring contacts. The circuit board is mounted on the upper surface of the lower housing, and the coil is mounted on the upper part of the circuit board. The lower housing, circuit board, and coil constitute a stator. The upper housing is hollow, forming the outer contour of a vibration device. The weight portion includes a magnetic groove assembly, which includes a mass block, a first magnetic guide plate, and a second magnetic guide plate. Mass blocks are symmetrically fixed on both sides of the second magnetic guide plate, forming a rectangular magnetic groove structure with an open bottom. Magnets are fixed inside the magnetic groove. The first magnetic guide plate is welded to the upper surface of the mass block and the upper surface of the second magnetic guide plate. Spring contacts are connected to the side walls of the mass blocks on both sides of the weight portion to form oscillators. The weight portion is connected to the upper housing through the spring contacts on both sides. The upper housing and lower housing cooperate to form a closed cavity, and the weight portion is located directly above the coil.

[0006] Furthermore, the mass block includes a rectangular block body, the upper surface of which is provided with an assembly groove, and an assembly plate is integrally provided at the assembly groove. One end of the assembly plate extends out of one side of the rectangular block body, and the assembly plate and the assembly groove are used to weld to both ends of a magnetic guide plate to achieve lateral self-positioning with the magnetic guide plate. A positioning groove is integrally provided in the middle of the other side of the rectangular block body for embedding cushioning foam. A clearance groove is provided on the lower surface of the rectangular block body.

[0007] Furthermore, the second magnetic plate includes a magnetic plate, with enclosure plates symmetrically arranged vertically downward at both ends of the magnetic plate, and both ends of each enclosure plate protruding outward for welding to one side of the mass block; the upper surface of the magnetic plate is also provided with a slot that matches the first magnetic plate, and magnetic connecting plates are commonly provided on the surfaces of the two enclosure plates on both sides of the magnet.

[0008] Furthermore, the magnetic guide plate includes a magnetic guide panel, with vertical plates bent vertically downward at both ends to form an inverted U-shaped structure. Horizontal mounting plates are vertically arranged symmetrically on both sides of the vertical plates, and the horizontal mounting plates are used for welding to the assembly plate of the mass block.

[0009] Furthermore, the spring includes a mounting plate one, a mounting plate two, and a vibrating arm. The mounting plate one is a rectangular panel with an arc-shaped notch in the middle of one side of the rectangular panel surface. Two vibrating arms are symmetrically extended and inclined on the sidewalls of the rectangular panel on both sides of the arc-shaped notch. Each vibrating arm also has a mounting plate two at its end. The mounting plate one is connected to the inner surface of the upper shell, and the mounting plate two is welded to the surface of the mass block.

[0010] Furthermore, the mass block has spring-loaded welding grooves on both sides, and the inner side of the upper shell has protrusions.

[0011] Furthermore, damping bodies are provided on the inner sidewalls on both sides of the upper housing.

[0012] The advantages and positive effects of this invention are:

[0013] In this invention, the magnet is fixed inside the magnetic groove assembly, and the magnetic groove assembly is a rectangular magnetic groove structure with an open bottom, which is formed by assembling a mass block, a magnetic conductive plate 1, and a magnetic conductive plate 2. This structure effectively shields the magnetic leakage of the magnet in all directions, solves the problem of static magnetic attraction caused by magnetic leakage of the magnet reducing the service life of the spring, and improves the service life of the spring.

[0014] The magnetic conductive plate one and magnetic conductive plate two of the present invention both adopt a structure that is thick in the middle and thin at both sides, which facilitates welding with the mass block and ensures welding force. At the same time, the static magnetic force of the magnet on the upper and lower shells can be adjusted by adjusting the thickness of the magnetic conductive plates one and two, ensuring magnetic attraction balance, solving the problem of poor noise performance caused by polarization due to uneven force during product vibration, and reducing mold repair costs.

[0015] The present invention has a positioning groove integrally formed in the middle of one side of the mass block perpendicular to the vibration direction. The positioning groove is used to embed the cushioning foam, which plays the role of positioning the cushioning foam, simplifying the process flow, improving production efficiency, and the setting of the cushioning foam plays the role of buffering the oscillator system at the moment of drop, reducing the impact force of the rigid surface on the spring sheet, protecting the overall structure of the oscillator system, and improving the feasibility of drop.

[0016] The spring used in this invention adopts a double vibration arm structure. Due to the setting of mounting plate one and mounting plate two, the positioning of the spring and the shell is greatly facilitated, and the problem of poor welding is solved. The double vibration arm structure can reduce stress concentration during vibration and at the moment of directional drop, effectively disperse the stress of the spring, reduce the total energy of instantaneous impact, and improve the feasibility of directional drop of the product.

[0017] The present invention features spring-loaded welding grooves on both sides of the mass block, allowing the spring-loaded pieces to be positioned and tightly fitted to the mass block, ensuring a stable connection. This simplifies the manufacturing process, solves the problem of poor welding caused by poor fit, improves product yield, and prevents deformation of the spring-loaded pieces. Furthermore, the inner side of the upper housing is provided with protrusions to prevent the spring-loaded pieces from colliding with the housing due to excessive amplitude, thus avoiding noise issues and extending product lifespan. Additionally, damping bodies are provided on the inner sidewalls of both sides of the upper housing to reduce noise and shorten the product's braking time. Attached Figure Description

[0018] Figure 1 This is an exploded view of the overall structure of the present invention;

[0019] Figure 2 This is a cross-sectional view along the YZ direction of the present invention;

[0020] Figure 3 This is a cross-sectional view along the XZ direction of the present invention;

[0021] Figure 4 This is a structural diagram of the oscillator of the present invention;

[0022] Figure 5 This is an assembly structure diagram of the cushioning foam and mass block of the present invention;

[0023] Figure 6 This is a structural diagram of the mass block of the present invention;

[0024] Figure 7 The assembly structure of the mass block and magnetic plate of the present invention Figure 1 ;

[0025] Figure 8 The assembly structure of the mass block and magnetic plate of the present invention Figure 2 ;

[0026] Figure 9 This is a diagram of the magnetic assembly structure of the present invention;

[0027] Figure 10 This is a structural diagram of the upper shell of the present invention. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0029] A transverse linear motor structure includes a lower housing 11, an upper housing 1, a circuit board 10, a coil 9, a weight portion, and spring plates 8. The circuit board is disposed on the upper surface of the lower housing, and the coil is disposed on the upper part of the circuit board. The lower housing, the circuit board, and the coil constitute a stator. The upper housing is hollow inside, forming the outer contour of a vibration device. The weight portion includes a magnetic groove assembly, which includes a mass block 5, a first magnetic plate 2, and a second magnetic plate 3. Mass blocks are symmetrically fixed on both sides of the second magnetic plate, forming a rectangular magnetic groove structure with an open bottom. Magnets 4 are fixed inside the magnetic groove C to give it weight, thereby amplifying the vibration. The first magnetic plate is welded to the upper surface of the mass block and the upper surface of the second magnetic plate. Spring plates are obliquely and symmetrically connected to the side walls of the mass blocks on both sides of the weight portion to form oscillators. The weight portion is connected to the upper housing through the spring plates on both sides. The upper housing and the lower housing cooperate to form a closed cavity, and the weight portion is located directly above the coil.

[0030] The mass block includes a rectangular block body. An assembly groove is formed on the upper surface of the rectangular block body. An assembly plate 5-1 is integrally formed in the assembly groove. One end of the assembly plate extends beyond one side of the rectangular block body. The assembly plate and the assembly groove are used to weld with the horizontal mounting plates at both ends of the magnetic guide plate, achieving lateral self-positioning with the magnetic guide plate. The other side of the rectangular block body is perpendicular to the vibration direction of the gravity unit. A positioning groove 5-2 is integrally formed in the middle of this side. This positioning groove is used to embed cushioning foam 7, serving to position the cushioning foam at surface A, simplifying the process and improving production efficiency. Furthermore, the cushioning foam provides a buffering effect on the oscillator system during a drop, reducing the impact force of the rigid surface on the spring sheet, protecting the overall structure of the oscillator system, and improving drop feasibility. A clearance groove 5-3 is formed on the lower surface of the rectangular block body. This clearance groove avoids the risk of noise generated by the mass block colliding with the coil or the cured adhesive during oscillation.

[0031] The second magnetic plate includes a magnetically conductive flat plate 3-1. Enclosing plates 3-2 are symmetrically arranged vertically downwards at both ends of the magnetically conductive flat plate, and both ends of each enclosing plate protrude outwards for welding to one side of the mass block. The enclosing plates and the mass block cooperate to form a rectangular magnetic groove structure for embedding magnets. To better fix the magnets, a magnetically conductive connecting plate 12 is provided on the surface between the enclosing plates on both sides of the magnet. This magnetically conductive connecting plate and the enclosing plates not only facilitate the installation of the magnets, but also effectively shield against magnetic leakage from various directions, solving the problem of static magnetic attraction caused by magnet leakage reducing the lifespan of the spring sheet, thereby improving the lifespan of the spring sheet. Furthermore, the surface of the magnetically conductive flat plate also has a slot adapted to the magnetically conductive panel of the first magnetically conductive plate for positioning and connecting the first magnetically conductive plate.

[0032] The magnetic guide plate includes a magnetic guide panel 2-2. The magnetic guide panel has vertically bent vertical plates at both ends to form an inverted U-shaped structure. Horizontal mounting plates 2-1 are symmetrically arranged on both sides of the vertical plates. The horizontal mounting plates are used to weld to the assembly plate of the mass block to ensure welding force. At the same time, the static magnetic force of the magnet on the upper and lower shells can be adjusted by adjusting the thickness of the magnetic guide panel to ensure magnetic attraction balance. This solves the problem of poor noise performance caused by polarization due to unbalanced force during product vibration and reduces mold repair costs.

[0033] The spring includes mounting plate 1 8-3, mounting plate 2 8-1, and vibrating arm 8-2. Mounting plate 1 is a rectangular panel with an arc-shaped notch in the middle of one side of the rectangular panel surface. Two vibrating arms are symmetrically extended and inclined on the side walls of the rectangular panel on both sides of the arc-shaped notch. Each vibrating arm also has a mounting plate 2 at its end. Mounting plate 1 is connected to the inner surface of the mounting side plate of the upper shell, and mounting plate 2 is welded to the surface A of the mass block; thereby installing the weight part inside the upper shell.

[0034] The side wall of the vibration arm and the arc arm with the arc notch on the mounting plate are integrally formed, thus extending the length of the vibration arm. The vibration arm is also tapered in the middle, which reduces the vibration frequency, improves the vibration sensation, disperses stress concentration, and protects itself from damage.

[0035] The spring of the present invention adopts a double vibration arm structure. Due to the setting of mounting plate one and mounting plate two, the positioning of the spring and the shell is greatly facilitated, and the problem of poor welding is solved. The double vibration arm structure can reduce stress concentration during vibration and at the moment of directional drop, effectively disperse the stress of the spring, reduce the total energy of instantaneous impact, and improve the feasibility of directional drop of the product.

[0036] Furthermore, in order to optimize the welding operation of the spring and the mass block, avoid defects such as welding gaps, and improve the yield rate, the mass block is provided with spring welding grooves on both sides, so that the spring and the mass block can be positioned and fit tightly, the connection is stable, the process difficulty is simplified, the welding defects caused by poor fit are solved, the product yield rate is improved, and the deformation of the spring itself is prevented.

[0037] In a specific implementation of the present invention, in order to better weld the mounting plate of the spring piece to the upper housing, a boss 1-1 is also provided on the inner side of the upper housing to avoid noise problems caused by the spring piece colliding with the housing due to excessive amplitude, while improving the product's service life and increasing the product's feasibility. Damping bodies 6 are also provided on the inner sidewalls on both sides of the upper housing to reduce noise in the entire vibration device.

[0038] The circuit board receives power from the outside and supplies the power to the coil. After receiving the power supplied by the circuit board, the coil generates an electric field, which interacts with the magnetic field of the magnet and generates stable Y-axis vibration through the cooperation of the spring.

[0039] This invention effectively shields magnetic leakage from all directions of the magnet by setting a rectangular magnetic groove structure for the magnetic groove assembly, optimizing the spring sheet structure, and setting buffer foam, thereby improving the service life of the spring sheet and the mechanical reliability of the product.

[0040] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A transverse linear motor structure, comprising a lower housing, an upper housing, a circuit board, a coil, a weight component, and a spring, wherein the circuit board is disposed on the upper surface of the lower housing, the coil is disposed on the upper part of the circuit board, and the lower housing, the circuit board, and the coil constitute a stator; the upper housing is hollow inside, forming the outer contour of a vibration device, characterized in that: The weight unit includes a magnetic groove assembly, which includes a mass block, a first magnetic guide plate, and a second magnetic guide plate. Mass blocks are symmetrically fixed on both sides of the second magnetic guide plate to form a rectangular magnetic groove structure with an open bottom. Magnets are fixed inside the magnetic groove. The first magnetic guide plate is welded to the upper surface of the mass block and the upper surface of the second magnetic guide plate. Spring pieces are connected to the side walls of the mass blocks on both sides of the weight unit to form oscillators. The weight unit is connected to the upper housing through the spring pieces on both sides. The upper housing and the lower housing cooperate to form a closed cavity, and the weight unit is located directly above the coil. The mass block includes a rectangular block body. The upper surface of the rectangular block body has an assembly groove. An assembly plate is integrally provided in the assembly groove. One end of the assembly plate extends out of one side of the rectangular block body. The assembly plate and the assembly groove are used to weld to both ends of a magnetic plate to achieve lateral self-positioning with the magnetic plate. A positioning groove is integrally provided in the middle of the other side of the rectangular block body. The positioning groove is used to embed cushioning foam. The lower surface of the rectangular block body has a clearance groove. The second magnetic plate includes a magnetic plate, with enclosure plates symmetrically arranged vertically downward at both ends of the magnetic plate. Each enclosure plate has two ends that protrude outward for welding to one side of the mass block. The upper surface of the magnetic plate is also provided with a slot that matches the first magnetic plate. A magnetic connecting plate is provided on the surface of the two enclosure plates on both sides of the magnet.

2. The transverse linear motor structure according to claim 1, characterized in that: The magnetic guide plate includes a magnetic guide panel, with vertical plates bent vertically downward at both ends to form an inverted U-shaped structure. Horizontal mounting plates are vertically arranged symmetrically on both sides of the vertical plates, and the horizontal mounting plates are used for welding to the assembly plate of the mass block.

3. The transverse linear motor structure according to claim 1, characterized in that: The spring includes a first mounting plate, a second mounting plate, and a vibrating arm. The first mounting plate is a rectangular panel with an arc-shaped notch in the middle of one side of the surface of the rectangular panel. Two vibrating arms are symmetrically extended and inclined on the sidewalls of the rectangular panel on both sides of the arc-shaped notch. Each vibrating arm also has a second mounting plate at its end. The first mounting plate is connected to the inner surface of the upper housing, and the second mounting plate is welded to the surface of the mass block.

4. The transverse linear motor structure according to claim 1, characterized in that: The mass block has spring-loaded welding grooves on both sides, and the inner side of the upper shell also has a boss.

5. The transverse linear motor structure according to claim 1, characterized in that: Damping bodies are also provided on the inner sidewalls on both sides of the upper housing.

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