Vibration motor

Abstract

The present application discloses a vibration motor, comprising a stator, a vibrator module, a coil and an elastic element, wherein the vibrator module, the coil and the elastic element are arranged in the stator, the stator comprises a rotating shaft, the vibrator module comprises an axial hole, and the rotating shaft passes through the axial hole, the elastic element is arranged away from the axial hole, and one end of the elastic element is connected to the side of the stator, while the other end of the elastic element is correspondingly connected to the side of the vibrator module. Through the arrangement of the rotating shaft and the elastic element, the vibration motor generates a vibration sense and performs a pendulum-like swing, making the swing more stable and efficient, and the swing amplitude is larger, thereby improving the intensity of the vibration sense, and the elastic element is not prone to tilting or breaking, so the dependence on the strength of the elastic element can be reduced. In this way, in addition to improving the stability and efficiency of the vibration motor, it can also provide greater vibration sense intensity and reliability.

Description

Technical Field

[0001] The present application relates to a vibration motor, and in particular to a pendulum-type vibration motor. Background Art

[0002] The vibration motor includes a stator and a mover. The stator is the outer shell of the product and has upper and lower cover plates and a frame with coils installed. The mover is a component inside the product and has magnets, counterweights and springs. The stator and the mover are connected by the spring. When the vibration motor moves, the mover moves linearly inside the stator to generate vibration.

[0003] The problems with existing vibration motors are: 1. The design concept is simple; 2. It only produces linear vibration in a single direction; 3. The quality requirements for the spring are very high. If the spring quality is poor, the vibrator may tilt or the spring may break.

[0004] Therefore, the existing technology is indeed in need of further providing more improved solutions. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the main purpose of this application is to provide a vibration motor. Through the relative configuration of the rotating shaft and the elastic element, the vibration motor can provide vibration in a swinging manner, thereby improving the stability and efficiency of the vibration motor, and also providing greater vibration intensity and reliability.

[0006] To achieve the above objectives, the main technical means adopted by this application is to make the vibration motor include:

[0007] The stator comprises an upper housing, a rotating shaft, and a lower base plate, wherein the upper housing and the lower base plate are combined to form an accommodating space, the rotating shaft is accommodated in the accommodating space, and the rotating shaft is connected to the bottom surface of the upper housing and the top surface of the lower base plate;

[0008] a vibrator module disposed between the upper housing and the lower base plate, the vibrator module comprising a plate body and a permanent magnet, the plate body comprising a through hole and an axial hole therethrough, the permanent magnet being embedded in the through hole, and the axial hole being for the rotation shaft to pass through;

[0009] a coil, the coil being arranged on an outer surface adjacent to the plate body corresponding to the permanent magnet;

[0010] An elastic element is away from the shaft hole, one end of the elastic element is correspondingly connected to the side surface of the upper housing, and the other end of the elastic element is correspondingly connected to a side surface of the plate body.

[0011] Preferably, the upper housing includes a first through hole, the lower base plate includes a second through hole, the first through hole and the second through hole are arranged opposite to each other, and the rotating shaft passes through the first through hole and the second through hole.

[0012] Preferably, the rotating shaft comprises:

[0013] a shaft body, which passes through the first through hole and the second through hole;

[0014] A ball bearing is rotatably sleeved on the shaft body and accommodated in the shaft hole.

[0015] Preferably, the plate comprises:

[0016] a front side surface, the front side surface having a curved surface;

[0017] A left side surface and a right side surface are arranged parallel to each other, and one end of the left side surface and the right side surface are respectively connected to the two ends of the front side surface;

[0018] Two extension surfaces, one end of each extension surface is connected to the other end of the left side surface and the other end of the right side surface one-to-one, and the other ends of each extension surface are connected to each other at an intersection, and the intersection is formed away from the front side surface.

[0019] Preferably, the vibration motor further comprises:

[0020] The fixing members are arranged at both ends of each elastic element, and the fixing members are fixed to the inner side surface of the upper housing and the outer side surface of the plate body.

[0021] Preferably, the fixing member comprises:

[0022] a first fixing plate fixed to the inner side of the upper housing or the outer side of the plate;

[0023] The second fixing plate is arranged parallel to the first fixing plate.

[0024] Preferably, the elastic element is W-shaped, and two ends of the elastic element are sandwiched between the first fixing plate and the second fixing plate.

[0025] Preferably, the through hole and the axial hole are arranged in an array along a first direction, and the through hole and the axial hole penetrate the plate body along an axial direction, and the first direction and the axial direction are perpendicular to each other.

[0026] Preferably, the elastic element is arranged between the plate and the upper housing along a second direction, and the second direction, the first direction and the axial direction are respectively perpendicular to each other.

[0027] Preferably, the vibration motor comprises:

[0028] The flexible circuit board is partially arranged on the top surface of the lower base plate and is located below the coil in the orthographic projection direction.

[0029] Preferably, the flexible circuit board comprises:

[0030] a base plate extending away from the shaft hole along the first direction;

[0031] a first connecting plate extending upwardly in the axial direction from one end of the base plate away from the shaft hole;

[0032] a second connecting plate extending from one end of the first connecting plate away from the base plate, away from the base plate along the first direction, and bent to extend toward the second direction;

[0033] A printed circuit layer is arranged on the top surface of the substrate.

[0034] Preferably, the number of the coils is two, and the two coils are respectively arranged on the top surface adjacent to the plate and the bottom surface adjacent to the plate corresponding to the permanent magnet.

[0035] Through the above-mentioned structure, when the circuit and the coil are energized, the vibrator module begins to swing under the reaction force of the Lorentz force, causing the vibration motor to generate a vibration sensation and perform a pendulum-like swing. In addition, by arranging elastic elements on the side of the vibrator module, the vibrator module will not be offset during the swing, making the vibrator module more stable and efficient during the swing. The pendulum-type vibration motor of the present application can provide a larger swing amplitude and enhance the intensity of the vibration sensation. With the cooperation of the rotating shaft, the elastic element is not prone to tilting or breaking. Therefore, the vibrator module can reduce its high dependence on the structural strength of the elastic element itself. In this way, in addition to improving the stability and efficiency of the vibration motor, it can also provide greater vibration intensity and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 It is a three-dimensional diagram of the pendulum-type vibration motor of the present application.

[0038] Figure 2 It is an exploded view of the pendulum vibration motor of the present application.

[0039] Figure 3 yes Figure 1 Magnified view of area A.

[0040] Figure 4 yes Figure 1 BB' cross-sectional view of a pendulum vibration motor.

[0041] Figure 5 It is a structural diagram of the board of this application.

[0042] Figure 6 It is a side view of the pendulum vibration motor of the present application.

[0043] Figure 7 It is a three-dimensional diagram of the flexible circuit board of this application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Figure 1 : is a three-dimensional diagram of the pendulum vibration motor of the present application. Figure 1 As shown, an embodiment of a pendulum-type vibration motor 1 of the present application includes a stator 10, a vibrator module 20, a coil 30, an elastic element 40, a flexible circuit board 50, and two locking members 60. The vibrator module 20 is housed within the stator 10. The coil 30 is disposed on the outer surface of the vibrator module 20. The elastic element 40 is disposed on one of the side surfaces of the vibrator module 30. One end of the elastic element 40 is connected to one of the side surfaces (e.g., the left or right side) of the vibrator module 20, and the other end of the elastic element 40 is connected to the inner side surface of the stator 10, wherein the inner side surface of the stator 10 is connected to one of the side surfaces of the vibrator module 20. The flexible circuit board 50 is disposed in front of the coil 30. Two locking members 60 are disposed on two opposing outer sides of the stator 10. The vibrator module 20 generates a driving magnetic field and provides a vibration sense, enabling the vibrator module 20 to swing in an arc to the left or right in conjunction with the elastic element 40.

[0046] In detail, Figure 2 This is the exploded view of the pendulum vibration motor of this application. Please refer to Figure 1 and Figure 2The stator 10 has an upper housing 11, a rotating shaft 12 and a lower base plate 13. The upper housing 11 and the lower base plate 13 are combined to form a receiving space, and the rotating shaft 12 is accommodated in the receiving space, and the two ends of the rotating shaft 12 are respectively connected to the bottom surface of the upper housing 11 and the top surface of the lower base plate 13. Specifically, the upper housing 11 includes an upper plate body 111 and an annular side surface 112. The annular side surface 112 extends from the four side edges of the upper plate body 111 toward the lower base plate 13. When the upper housing 11 and the lower base plate 13 are combined, the bottom edge of the annular side surface 112 is vertically adjacent to the side edge of the lower base plate 13. The receiving space is formed by the combination of the upper plate body 111, the annular side surface 112 and the lower base plate 13. In this embodiment, the upper housing 11 and the lower base 13 are made of stainless steel. Furthermore, the upper housing 11 and the lower base 13 are preferably made of painted stainless steel (eg, 444-1 / 4H) or similar materials to serve as a protective shell for the pendulum vibration motor 1 .

[0047] In one embodiment, the first through-hole 113 extends through the upper plate 111, while the second through-hole 131 extends through the lower base plate 13. Furthermore, the first through-hole 113 and the second through-hole 131 are arranged in a corresponding manner. Thus, the rotating shaft 12 can be passed through both the first through-hole 113 and the second through-hole 131, with both ends of the rotating shaft 12 respectively received in the first through-hole 113 and the second through-hole 131, thereby securing the rotating shaft 12 and preventing it from moving.

[0048] In one embodiment, the rotation shaft 12 may extend from the bottom surface of the upper plate 111 toward the lower base plate 13 and connect to the top surface of the lower base plate 13. In other words, the rotation shaft 12 may be integrally formed with the upper plate 111. Alternatively, in different embodiments, the rotation shaft 12 may extend from the top surface of the lower base plate 13 toward the upper plate 111 and connect to the bottom surface of the upper plate 111. In other words, the rotation shaft 12 may also be integrally formed with the lower base plate 13.

[0049] In one embodiment, the rotating shaft 12 includes a shaft body 121 and a ball bearing 122. The shaft body 121 is provided with a first through-hole 113 and a second through-hole 131. The ball bearing 122 is rotatably mounted on the middle portion of the shaft body 121 and is housed within the vibrator module 20. By making the rotating shaft 12 a separate component, the assembly process of the pendulum vibration motor 1 is streamlined, thereby improving assembly efficiency.

[0050] Figure 3 yes Figure 1 The enlarged view of area A is as follows: Figure 2 and Figure 3As shown, the upper plate 111 further includes an opening 114, located in front of the coil 30 near the upper plate 111. Opening 114 communicates with the accommodating space, allowing an external power source to pass through the power line L1 extending outward from the coil 30 and then be electrically connected to the coil 30 near the upper plate 111, thereby enabling the coil 30 near the upper plate 111 to generate a magnetic field. Furthermore, the power line L2 extending outward from the coil 30 is electrically connected to an external power source, enabling the coil 30 near the lower base plate to generate a magnetic field.

[0051] In one embodiment, Figure 4 yes Figure 1 The BB' cross-sectional view of the pendulum vibration motor is a cross-sectional view taken from the flexible circuit board 50 toward the rotation axis 12. Figure 5 This is a structural diagram of the board of this application, such as Figure 4 and 5 As shown, the vibrator module 20 is disposed between the upper housing 11 and the lower base plate 13. In other words, the vibrator module 20 is housed within the housing space. The vibrator module 20 comprises a plate 21 and a permanent magnet 22. The permanent magnet 22 is embedded within the plate 21. Specifically, the plate 21 includes a front side 211, left and right sides 212, two extended surfaces 213, a rear side 214, a through hole 215, and an axis hole 216. The front side surface 211 has an arcuate surface, the left side surface 212 and the right side surface 212 are arranged parallel to each other, and one end of the left side surface 212 and the right side surface 212 are respectively connected to the two ends of the front side surface 211, and one end of the two extension surfaces 213 is connected one-to-one with the other end of the left side surface 212 and the right side surface 212, and the other ends of the two extension surfaces 213 are connected to each other at an intersection, and the intersection is far away from the front side surface 211. The rear side surface 214 has an arcuate surface, and the through hole 215 and the axial hole 216 are arranged along the first direction, and the through hole 215 and the axial hole 216 pass through the plate body 21 along the axial direction, and the first direction is perpendicular to the axial direction. The permanent magnet 22 is embedded in the through-hole 215. The shaft 121 of the rotating shaft 12 is provided with a shaft hole 216. The ball bearing 122 of the rotating shaft 12 engages the shaft hole 216, allowing the rotating shaft 12 to serve as a swing fulcrum for the vibrator module 20, thereby enabling the vibrator module 20 to swing. In this embodiment, the first direction refers to the direction of the rotating shaft 12 toward the opening 114. The axial direction refers to the direction in which the rotating shaft 12 extends toward the upper housing 11 and the lower base plate 13. The permanent magnet 22 is made of neodymium iron boron, and the counterweight is made of tungsten nickel iron alloy.

[0052] In one embodiment, there are two coils 30, each located on the outer surface of the plate 21 adjacent to the permanent magnet 22. Specifically, one of the two coils 30 is located on the top surface of the plate 21, while the other is located on the bottom surface of the plate 21. In this embodiment, the two coils 30 comprise a top coil and a bottom coil. The top coil is glued to the bottom surface of the upper housing 11, while the hollow space of the bottom coil 30 provides a passage for electronic components on the flexible printed circuit board 50. Furthermore, the bottom coil 30 is placed on the top surface of the flexible printed circuit board 50. Furthermore, the bottom coil 30 and the flexible printed circuit board 50 are glued to the top surface of the lower base plate 13. The top and bottom coils 30 are preferably made of pure copper, with a self-adhesive layer and an insulating layer added to the surface of the top coil 30. A copper content of ≥99.95% is recommended to minimize energy loss due to internal resistance. The number of coil turns is approximately 60, and the coil can be adjusted and customized according to actual needs.

[0053] In one embodiment, the two elastic elements 40 are disposed between the plate 21 and the upper housing 11 along the second direction, and the second direction is perpendicular to the first direction and the axial direction. Specifically, the two elastic elements 40 are not disposed on an extension of the rotation axis 12 in the second direction. For example, the rotation axis 12 is equidistant from the contact points formed by the two elastic elements 40 with the left side 212 and the right side 212, respectively. In other words, the contact points formed by the rotation axis 12 and the two elastic elements 40 with the left side 212 and the right side 212, respectively, form an equilateral triangle or an isosceles triangle. In this embodiment, the two elastic elements 40 are made of stainless steel (e.g., SUS301).

[0054] In one embodiment, Figure 6 : is a side view of the pendulum vibration motor of the present application, as shown in FIG. Figure 6As shown, the pendulum-type vibration motor 1 further includes a fixing member 70. The fixing member 70 is disposed at both ends of each elastic element 40. The ends of each elastic element 40 are respectively fixed to the inner side surface of the upper housing 11 and the outer side surface of the plate body 21 via the fixing member 70, so that each elastic element 40 is appropriately stretched. Specifically, the fixing member 70 includes a first fixing plate 71 and a second fixing plate 72. The first fixing plate 71 is fixed to the inner side surface of the upper housing 11 or the outer side surface of the plate body 21. The second fixing plate 72 is arranged parallel to the first fixing plate 71. The fixing member 70 is welded to the inner side surface of the upper housing 11 and the outer side surface of the plate body 21 via the first fixing plate 71. Subsequently, one end of each elastic element 40 is welded to the side of the first fixing plate 71 away from the inner side surface of the upper housing 11. Furthermore, the second fixing plate 72 is welded to the side of one end of each elastic element 40 away from the inner side surface of the upper housing 11, so that one end of each elastic element 40 is sandwiched between the first fixing plate 71 and the second fixing plate. In this embodiment, the fixing member 70 is made of stainless steel (eg, SUS301).

[0055] In one embodiment, the two elastic elements 40 are W-shaped, and two ends of the W-shape are respectively inserted into the fixing piece 70 on the inner side of the upper housing 11 and the fixing piece 70 on the outer side of the plate 21 .

[0056] In one embodiment, please refer to Figure 7 , Figure 7 This is a perspective view of the flexible circuit board of the present application. The flexible circuit board 50 is partially disposed on the top surface of the lower base plate 13. The portion of the flexible circuit board 50 disposed on the top surface of the lower base plate 13 is located below the orthographic projections of the two coils 30 in the orthographic projection direction. Specifically, the flexible circuit board 50 includes a substrate 51, a first connecting plate 52, a second connecting plate 53, and a printed circuit layer 54. The substrate 51 extends in a first direction away from the axial hole 216. The first connecting plate 52 extends axially upward from the end of the substrate 51 away from the axial hole 216. The second connecting plate 53 extends outward from the end of the first connecting plate 52 away from the substrate 51 in the first direction. After extending outward in the first direction, the second connecting plate 53 bends and extends in a second direction. The second connecting plate 53 extending in the first direction is parallel to the substrate 51, while the second connecting plate 53 extending in the second direction is perpendicular to the substrate 51. The printed circuit layer 54 is disposed on the top surface of the substrate 51. In this embodiment, the substrate 51 passes through the front side of the upper housing 11, and the first connecting plate 52 is located in front of the front side of the upper housing 11. The second connecting plate 53 is L-shaped. The printed circuit layer 54 is electrically connected to the power line L2 of the bottom coil 30 to connect with the coil 30 to achieve circuit connection and conduction of the system. Materials include plastic, glue, copper, etc.

[0057] In one embodiment, if Figure 6 As shown, the two locking members 60 are respectively arranged on the two opposite outer surfaces of the upper housing 11. The two locking members 60 are made of metal stainless steel, preferably stainless steel (such as SUS301-1 / 2H) or similar types of materials, which require high hardness and strong supporting capacity. Specifically, the two locking members 60 are respectively fixed to the left outer side surface and the right outer side surface of the stator 10. After the two locking members 60 extend axially, they then extend outward away from the left outer side surface and the right outer side surface in a second direction to form a fixing surface. The fixing surface is axially penetrated to form a locking through-hole 61. The locking through-hole 61 is fixed to the inside of the mobile phone or watch by screws to achieve the purpose of connection and fixation.

[0058] In summary, when the circuit and coil are energized, the vibrator module begins to swing under the reaction force of the Lorentz force, causing the vibration motor to generate a vibration sensation and perform a pendulum-like swing. In addition, by providing an elastic element on the side of the vibrator module, the vibrator module will not deviate during the swing, making the vibrator module more stable and efficient during the swing. The vibration motor of the present application can provide a larger swing amplitude, thereby enhancing the intensity of the vibration sensation. With the cooperation of the rotating shaft, the elastic element is less likely to tilt or break, thereby reducing the vibrator module's high dependence on the structural strength of the elastic element itself. In this way, in addition to improving the stability and efficiency of the vibration motor, it can also provide greater vibration intensity and reliability.

[0059] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0060] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which fall within the scope of protection of this application.

Claims

1. A vibration motor, characterized in that: Include: The stator comprises an upper housing, a rotating shaft, and a lower base plate, wherein the upper housing and the lower base plate are combined to form an accommodating space, the rotating shaft is accommodated in the accommodating space, and the rotating shaft is connected to the bottom surface of the upper housing and the top surface of the lower base plate, wherein the upper housing includes a first through-hole, the lower base plate includes a second through-hole, the first through-hole and the second through-hole are arranged opposite each other, and the rotating shaft passes through the first through-hole and the second through-hole; a vibrator module disposed between the upper housing and the lower base plate, the vibrator module comprising a plate body and a permanent magnet, the plate body comprising a through hole and an axial hole therethrough, the permanent magnet being embedded in the through hole, and the axial hole being for the rotation shaft to pass through; a coil, the coil being disposed on an outer surface adjacent to the plate body corresponding to the permanent magnet; and an elastic element, the elastic element being away from the shaft hole, one end of the elastic element being correspondingly connected to a side surface of the upper housing, and the other end of the elastic element being correspondingly connected to a side surface of the plate body; The rotating shaft includes a shaft body and a ball bearing, the shaft body passes through the first through hole and the second through hole, and the ball bearing is rotatably sleeved on the shaft body and accommodated in the shaft hole; When the coil is energized, the vibrator module begins to swing under the reaction force of the Lorentz force, causing the vibration motor to generate a vibration sensation and swing like a pendulum.

2. The vibration motor according to claim 1, wherein The plate body comprises: a front side surface, the front side surface having a curved surface; A left side surface and a right side surface are arranged parallel to each other, and one end of the left side surface and the right side surface are respectively connected to the two ends of the front side surface; and Two extension surfaces, one end of each extension surface is connected to the other end of the left side surface and the other end of the right side surface one-to-one, and the other ends of each extension surface are connected to each other at an intersection, and the intersection is formed away from the front side surface.

3. The vibration motor according to claim 1, wherein The vibration motor also includes: The fixing members are arranged at both ends of each elastic element, and the fixing members are fixed to the inner side surface of the upper housing and the outer side surface of the plate body.

4. The vibration motor according to claim 3, wherein The fixing member comprises: a first fixing plate fixed to the inner side of the upper housing or the outer side of the plate; and The second fixing plate is arranged parallel to the first fixing plate.

5. The vibration motor according to claim 4, wherein The elastic element is W-shaped, and two ends of the elastic element are sandwiched between the first fixing plate and the second fixing plate.

6. The vibration motor according to claim 1, wherein The through hole and the axial hole are arranged in an array along a first direction, and the through hole and the axial hole penetrate the plate body along an axial direction, and the first direction and the axial direction are perpendicular to each other.

7. The vibration motor according to claim 6, wherein The elastic element is disposed between the plate and the upper housing along a second direction, and the second direction, the first direction, and the axial direction are respectively perpendicular to each other.

8. The vibration motor according to claim 7, wherein The vibration motor comprises: The flexible circuit board is partially arranged on the top surface of the lower base plate and is located below the coil in the orthographic projection direction.

9. The vibration motor according to claim 8, wherein The flexible circuit board comprises: a base plate extending away from the shaft hole along the first direction; a first connecting plate extending upwardly in the axial direction from one end of the base plate away from the shaft hole; a second connecting plate extending outwardly from the first connecting plate at one end away from the base plate along the first direction and bending to extend toward the second direction; and A printed circuit layer is arranged on the top surface of the substrate.

10. The vibration motor according to claim 9, wherein The number of the coils is two, and the two coils are respectively arranged adjacent to the top surface of the plate and the bottom surface of the plate corresponding to the permanent magnet.

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