A horizontal linear vibration motor structure and implementation method thereof

Abstract

The present invention discloses a horizontal linear vibration motor structure, including a lower housing and an upper housing, the upper housing is located above the lower housing, a circuit board is connected to the middle position above the lower housing, a number of coils are connected to the circuit board, a mass block is also placed above the lower housing, and a magnetic steel corresponding to the coil is connected to the interior of the mass block. The present invention also discloses a method for realizing the horizontal linear vibration motor structure; the upper and lower housing materials of the present invention are magnetic conductive materials with equal thickness, and the distances between the magnetic steel and the upper and lower housings in all directions are equal. This symmetrical structure makes the electromagnetic force in all directions on the movable part zero, ensuring that the spring is not subjected to other loads except gravity in a static state, so that the motor runs smoothly and has a good life performance; the mass block is divided into large and small pieces to avoid blind hole structures. On the premise of ensuring the weight of the moving part, it avoids structures that are difficult to form or have poor forming dimensions, and greatly improves the manufacturing feasibility.

Description

Technical Field

[0001] The present invention belongs to the technical field of linear motors, and in particular relates to a horizontal linear vibration motor structure and an implementation method thereof. Background Art

[0002] Micro vibration motors are indispensable components for electronic products such as mobile phones, tablet computers, and electronic toys, providing tactile feedback to users. As competition in the smartphone market intensifies, mobile phone manufacturers are paying more and more attention to the user's tactile experience, and linear vibration motors that are different from traditional rotor motors have appeared on the market. Compared with traditional rotor motors, linear motors have great advantages in vibration characteristics, response time, service life, noise, etc., and they can provide a variety of vibration modes to provide users with rich, diverse, delicate and realistic tactile feedback. At present, different manufacturers have different design schemes for X-axis horizontal vibration linear motors, and the motors have their own advantages and disadvantages in characteristics. Some manufacturers have strong motor vibration, but the structure is complex and difficult to manufacture. Other manufacturers have simple structures, but the vibration is slightly weaker. With the increase in magnetic components in smartphones and the continuous improvement of electromagnetic interference requirements, high-performance vibration motors alone can no longer meet customer needs, and requirements for high vibration and low leakage magnetic flux have been put forward. Summary of the invention

[0003] The purpose of the present invention is to provide a horizontal linear vibration motor structure to solve the problems raised in the above background technology. The horizontal linear vibration motor structure provided by the present invention has the characteristics of simple structure and strong vibration feeling.

[0004] Another object of the present invention is to provide a method for realizing a horizontal linear vibration motor structure.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a horizontal linear vibration motor structure, comprising a lower shell and an upper shell, the upper shell is located above the lower shell, a circuit board is connected to the middle position above the lower shell, a plurality of coils are connected to the circuit board, a mass block is also placed above the lower shell, and a magnet corresponding to the coil is connected to the inside of the mass block.

[0006] Furthermore, in the present invention, two ends of the mass block are connected to the inner wall of the upper housing via spring sheets.

[0007] In the present invention, further, a limiting block is connected to a position above the lower housing corresponding to the spring sheet.

[0008] Further in the present invention, the mass block comprises a support plate, a small mass block and a large mass block, wherein the large mass blocks are connected to both ends of the support plate, and a plurality of small mass blocks are connected between the two large mass blocks.

[0009] Furthermore, in the present invention, the circuit board is a flexible structure.

[0010] In the present invention, the thickness of the lower housing and the upper housing are equal, and the lower housing and the upper housing are magnetic conductive structures.

[0011] Furthermore, in the present invention, the support plate is a non-magnetic conductive structure.

[0012] In the present invention, the spring sheet is further a metal structure or a non-metal elastic structure.

[0013] In the present invention, the method for realizing the horizontal linear vibration motor structure further comprises the following steps:

[0014] (a) The lower housing and the upper housing form an outer shell, which contains the internal structure;

[0015] (ii) The magnet, the lower housing and the upper housing form a magnetic circuit to provide a motor driving magnetic field;

[0016] (iii) The circuit board and the coil form a circuit. When power is applied, the electric field and the magnetic field interact with each other, driving the motor to vibrate along the X-axis;

[0017] (iv) The mass block provides mass, so that the motor can provide a stronger vibration feeling when vibrating;

[0018] (5) The spring sheet connects the mass block and the housing to provide elastic force, so that the motor vibrates back and forth along the X-axis;

[0019] (VI) The limit block limits the maximum travel of the motor in the event of mechanical impact such as falling or slight falling, so as to ensure that the spring sheet will not be damaged, which would lead to a sharp reduction in the life of the motor.

[0020] Further in the present invention, the implementation method of the horizontal linear vibration motor structure is as follows: the two ends of the mass block are connected to the inner wall of the upper casing through spring sheets, and the position above the lower casing corresponding to the spring sheets is also connected to a limiting block, the mass block includes a support plate, a small mass block and a large mass block, wherein the two ends of the support plate are connected to a large mass block, and a number of small mass blocks are connected between the two large mass blocks, the circuit board is a flexible structure, the thickness of the lower casing and the upper casing are equal, and the lower casing and the upper casing are magnetic conductive structures, the support plate is a non-magnetic conductive structure, and the spring sheet is a metal structure or a non-metallic hard structure.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The upper and lower housings of the present invention are made of magnetic conductive materials with equal thickness, and the distances between the magnet and the upper and lower housings in all directions are equal. This symmetrical structure makes the electromagnetic force in all directions on the movable part zero, ensuring that the spring is not subjected to any other load except gravity in a static state, so that the motor runs smoothly and has a good lifespan.

[0023] 2. The mass block of the present invention is divided into two pieces, large and small, to avoid blind hole structures. Under the premise of ensuring the weight of the moving part, it avoids structures that are difficult to form or have poor forming dimensions, and greatly improves manufacturing feasibility;

[0024] 3. The support plate of the present invention is made of non-magnetic material, which will not cause asymmetry of the magnetic circuit and has high structural strength;

[0025] 4. The present invention can be extended to three magnetic steels and two coils, four magnetic steels and three coils, etc.;

[0026] 5. The present invention connects the mass block and the casing by setting spring sheets on both sides to provide elastic force for movement, so that the motor can vibrate back and forth along the X-axis. The maximum stroke of the motor in the case of mechanical impact such as falling or micro-falling is limited by the set limit blocks to ensure that the spring will not be damaged, which will cause the life of the motor to be sharply reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a mass block according to Embodiment 2 of the present invention;

[0030] Figure 4 It is a schematic diagram of magnetic flux lines of two magnetic steels and two coils of the present invention;

[0031] Figure 5 It is a schematic diagram of magnetic flux lines of three magnetic steels and four coils of the present invention;

[0032] In the figure: 1, lower casing; 2, circuit board; 3, coil; 4, magnetic steel; 5, mass block; 51, support plate; 52, small mass block; 53, large mass block; 6, upper casing; 7, spring sheet; 8, limit block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1 and Figure 4The present invention provides the following technical solutions: a horizontal linear vibration motor structure, including a lower shell 1 and an upper shell 6, the lower shell 1 and the upper shell 6 are connected by a snap, the upper shell 6 is located above the lower shell 1, a circuit board 2 is connected to the middle position above the lower shell 1 by screws, two coils 3 are connected to the circuit board 2, a mass block 5 is also placed above the lower shell 1, and a magnetic steel 4 corresponding to the coil 3 is connected inside the mass block 5.

[0036] Furthermore, two ends of the mass block 5 are connected to the inner wall of the upper housing 6 via spring sheets 7 .

[0037] The above technical solution is adopted to provide elastic force so that the motor can vibrate back and forth along the X-axis.

[0038] Furthermore, a limiting block 8 is connected to the position above the lower housing 1 corresponding to the spring sheet 7 .

[0039] By adopting the above technical solution, the maximum stroke of the motor is limited in the case of mechanical impact such as falling or slight falling, so as to ensure that the spring will not be damaged, which will lead to a sharp reduction in the life of the motor.

[0040] Furthermore, the circuit board 2 is a flexible structure.

[0041] Furthermore, the thickness of the lower housing 1 and the upper housing 6 are equal, and the lower housing 1 and the upper housing 6 are magnetic conductive structures.

[0042] By adopting the above technical solution, the lower housing 1 and the upper housing 6 are made of silicon steel sheets with high magnetic permeability, so that more magnetic flux lines pass through the coil 3, thereby improving the utilization rate of the magnetic field and increasing the driving force of the motor.

[0043] Furthermore, the spring sheet 7 is a metal structure or a non-metal elastic structure.

[0044] Through the above technical solution, the spring piece 7 in this embodiment is made of stainless steel.

[0045] Furthermore, the method for realizing the horizontal linear vibration motor structure of the present invention comprises the following steps:

[0046] (i) The lower housing 1 and the upper housing 6 form an outer cavity to accommodate the internal structure;

[0047] (ii) the magnet 4, the lower housing 1 and the upper housing 6 form a magnetic circuit to provide a motor driving magnetic field;

[0048] (iii) The circuit board 2 and the coil 3 form a circuit. When the power is turned on, the electric field and the magnetic field interact with each other, driving the motor to vibrate along the X-axis;

[0049] (iv) The mass block 5 provides mass so that the motor can provide a stronger vibration feeling when vibrating;

[0050] (V) The spring sheet 7 connects the mass block 5 and the housing, providing elastic force to make the motor vibrate back and forth along the X-axis;

[0051] (VI) The limit block 8 limits the maximum travel of the motor in the event of a mechanical impact such as a fall or a slight fall, so as to ensure that the spring sheet 7 will not be damaged, which would result in a sharp reduction in the life of the motor.

[0052] Example 2

[0053] See also Figure 2-5 The difference between this embodiment and embodiment 1 is that the mass block 5 includes a support plate 51, a small mass block 52 and a large mass block 53, wherein the large mass blocks 53 are connected to both ends of the support plate 51, and a number of small mass blocks 52 are connected between the two large mass blocks 53, and the support plate 51 is a non-magnetic structure.

[0054] Furthermore, the method for realizing the horizontal linear vibration motor structure of the present invention comprises the following steps:

[0055] (i) The lower housing 1 and the upper housing 6 form an outer shell to accommodate the internal structure;

[0056] (ii) the magnet 4, the lower housing 1 and the upper housing 6 form a magnetic circuit to provide a motor driving magnetic field;

[0057] (iii) The circuit board 2 and the coil 3 form a circuit. When the power is turned on, the electric field and the magnetic field interact with each other, driving the motor to vibrate along the X-axis;

[0058] (iv) A large mass block 53 and two small mass blocks 52 are fixed on the support plate 51, and two magnets 4 are received in the holes of the large mass block 53. The above combination constitutes the moving assembly of the motor, so that the motor can provide a stronger vibration feeling when vibrating;

[0059] (V) The spring sheet 7 connects the mass block 5 and the housing, providing elastic force to make the motor vibrate back and forth along the X-axis;

[0060] (VI) The limit block 8 limits the maximum travel of the motor in the event of a mechanical impact such as a fall or a slight fall, so as to ensure that the spring sheet 7 will not be damaged, which would result in a sharp reduction in the life of the motor.

[0061] To sum up, the limit block 8 and coil 3 of the motor are fixedly connected to the lower housing 1 and are immovable parts, the magnet 4 and mass block 5 are movable parts, and after the motor is energized (alternating current), due to this specially designed electromagnetic structure, the vibrator is subjected to a left and right driving force that changes periodically with the direction of the current, and the spring sheet 7 connects the mass block 5 and the housing to provide elastic force, supporting the mass block 5 to reciprocate left and right along the X-axis under the action of the electromagnetic force, thereby enabling the motor to provide vibration tactile feedback to the outside; the present invention can also be extended to three magnets and two coils and four magnets and three coils, etc.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal linear vibration motor structure, comprising a lower housing (1) and an upper housing (6), characterized in that: The upper housing (6) is located above the lower housing (1); a circuit board (2) is connected to the middle position above the lower housing (1); a plurality of coils (3) are connected to the circuit board (2); a mass block (5) is also placed above the lower housing (1); a magnetic steel (4) corresponding to the coils (3) is connected inside the mass block (5); The thickness of the lower housing (1) and the upper housing (6) are equal, and the lower housing (1) and the upper housing (6) are magnetic conductive structures, and the distances between the magnetic steel (4) and the upper housing (6) and the lower housing (1) in all directions are equal; The two ends of the mass block (5) are connected to the inner wall of the upper housing (6) via spring sheets (7); The mass block (5) comprises a support plate (51), a small mass block (52) and a large mass block (53), wherein the large mass blocks (53) are connected to both ends of the support plate (51), and a plurality of small mass blocks (52) are connected between the two large mass blocks (53); The symmetrical structure makes the electromagnetic force in all directions on the movable part zero, ensuring that the spring is not subjected to any other load except gravity when it is stationary, making the motor run smoothly and having a good lifespan. The mass block (5) provides mass so that the motor can provide a stronger vibration feeling when vibrating; The spring sheet (7) connects the mass block (5) and the housing, and provides elastic force to make the motor vibrate back and forth along the X-axis; The limit block (8) limits the maximum travel of the motor in the event of a fall or slight fall, thereby ensuring that the spring sheet (7) is not damaged and the life of the motor is not drastically reduced.

2. A horizontal linear vibration motor structure according to claim 1, characterized in that: A limiting block (8) is also connected to a position above the lower housing (1) corresponding to the spring sheet (7).

3. A horizontal linear vibration motor structure according to claim 1, characterized in that: The circuit board (2) is a flexible structure.

4. A horizontal linear vibration motor structure according to claim 3, characterized in that: The support plate (51) is a non-magnetic conductive structure.

5. The horizontal linear vibration motor structure according to claim 1, characterized in that: The spring sheet (7) is a metal structure or a non-metal elastic structure.

6. The method for realizing the horizontal linear vibration motor structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: (i) The lower housing (1) and the upper housing (6) form an outer cavity to accommodate the internal structure; (ii), the magnetic steel (4), the lower housing (1) and the upper housing (6) form a magnetic circuit to provide a motor driving magnetic field; (iii) the circuit board (2) and the coil (3) form a circuit, and when power is supplied, the electric field and the magnetic field interact with each other, driving the motor to vibrate along the X-axis; (iv) The mass block (5) provides mass so that the motor can provide a stronger vibration feeling when vibrating; (V) The spring sheet (7) connects the mass block (5) and the housing to provide elastic force so that the motor vibrates back and forth along the X-axis; (VI) The limit block (8) limits the maximum travel of the motor in the event of a fall or slight fall, thereby ensuring that the spring sheet (7) is not damaged and the life of the motor is not drastically reduced.

7. The method for implementing the horizontal linear vibration motor structure according to claim 6, characterized in that: The two ends of the mass block (5) are connected to the inner wall of the upper housing (6) via a spring sheet (7); a limit block (8) is also connected to a position above the lower housing (1) corresponding to the spring sheet (7); the mass block (5) comprises a support plate (51), a small mass block (52) and a large mass block (53); the two ends of the support plate (51) are connected to the large mass block (53); a plurality of small mass blocks (52) are connected between the two large mass blocks (53); the circuit board (2) is a flexible structure; the thickness of the lower housing (1) and the upper housing (6) are equal; the lower housing (1) and the upper housing (6) are magnetic conductive structures; the support plate (51) is a non-magnetic conductive structure; and the spring sheet (7) is a metal structure or a non-metallic hard structure.

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