Foam structure, linear vibration motor and electronic equipment

Abstract

The utility model belongs to the technical field of vibration motors, and particularly relates to a foam structure, a linear vibration motor and electronic equipment, the foam structure is used for the linear vibration motor, the linear vibration motor comprises a shell and a vibrator assembly supported in the shell through a metal elastic sheet, and the linear vibration motor comprises a foam body, the foam body comprises a bottom wall and two opposite side walls, and a through groove parallel to the two side walls is formed between the two side walls; wherein one side wall is used for being connected with an oscillator assembly, the through groove is used for being clamped on a metal elastic piece, and the foam structure abuts against the metal elastic piece through the groove bottom of the through groove so as to be adaptively positioned in the non-vibration direction. By means of the structure, the assembly consistency of the foam structure can be achieved, and then the performance consistency of the linear vibration motor is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration motors, and particularly relates to a foam structure, a linear vibration motor and an electronic device. Background Art

[0002] Linear vibration motors are widely used in consumer electronic products such as mobile phones and tablets due to their small size, using vibration to replace sound. A linear vibration motor generally includes a housing, and a vibrator assembly and a stator assembly accommodated in the housing. The vibrator assembly is supported in the housing by a metal shrapnel and can reciprocate under the drive of the stator assembly. In related technologies, in order to prevent the vibrator assembly from colliding with the housing and making a sound, a damping member is usually provided between the housing and the vibrator assembly.

[0003] The conventional shrapnel structure has no damping member assembly positioning structure, which leads to inconsistent positions of the damping members in the assembled linear vibration motor, resulting in inconsistent performance of the linear vibration motor.

[0004] Therefore, in view of the above deficiencies, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a foam structure, a linear vibration motor and an electronic device to solve the problem of inconsistent positions of damping members in the linear vibration motor in the prior art.

[0006] The first aspect of the present utility model provides a foam structure for a linear vibration motor. The linear vibration motor includes a housing and a vibrator assembly supported in the housing by a metal shrapnel. The foam structure includes a foam body, which includes a bottom wall and two opposite side walls. A through groove parallel to the two side walls is provided between the two side walls.

[0007] Wherein, one of the side walls is used for connecting with the vibrator assembly, the through groove is used for accommodating the metal shrapnel, the metal shrapnel is clamped between the two side walls, and the foam structure abuts against the metal shrapnel through the bottom of the through groove to be adaptively positioned in the non-vibration direction.

[0008] The foam structure provided by the present utility model may also have the following additional technical features:

[0009] In a specific embodiment of the present utility model, the depth l of the through groove and the thickness L of the foam satisfy: 0.5L ≤ l ≤ 0.8L.

[0010] In a specific embodiment of the present utility model, the foam body is arranged in a cuboid shape.

[0011] In a specific embodiment of the present utility model, the through groove is a through groove processed by a die cutter, or the through groove is a through groove cut by a laser.

[0012] In a specific embodiment of the present utility model, the metal elastic sheet includes a first connecting portion, a second connecting portion, and a vibrating arm connecting the first connecting portion and the second connecting portion. The vibrating arm includes two elastic arms arranged in a V shape or a U shape, and the elastic arms are located in the through groove.

[0013] In a specific embodiment of the present utility model, the two side walls are perpendicular to the bottom wall.

[0014] In a specific embodiment of the present utility model, the thickness of the side wall close to the oscillator assembly is smaller than the thickness of the other side wall.

[0015] In a second aspect of the present utility model, a linear vibration motor is provided, which includes a housing, an oscillator assembly, a stator assembly, a metal elastic sheet, and the foam structure described in any one of the above. The stator assembly is fixed in the housing. The oscillator assembly is suspended and supported in the housing by the paired metal elastic sheets. There are two foam structures, which are arranged on both sides of the oscillator assembly along the vibration direction. And the side wall of each foam body is connected to the oscillator assembly. The through groove is clamped on the metal elastic sheet, and the bottom of the through groove is adapted and positioned with the metal elastic sheet in the non-vibration direction.

[0016] In a specific embodiment of the present utility model, glue application surfaces are provided at both ends of the oscillator assembly, and the oscillator assembly is bonded to the side wall through the glue application surfaces.

[0017] In a third aspect of the present utility model, an electronic device is further provided, which includes the linear vibration motor described in any one of the above.

[0018] The foam structure provided by the present utility model includes a bottom wall and two relatively arranged side walls on the foam body, and a through groove parallel to the two side walls is arranged between the two side walls. Thus, during assembly, the side wall can be connected to the end face of the oscillator assembly, the through groove is clamped on the metal elastic sheet, and the bottom of the through groove is adapted to the metal elastic sheet to achieve positioning in the non-vibration direction, thereby realizing the precise assembly of the foam structure and the oscillator assembly, realizing the assembly consistency of the foam structure, and ensuring the performance consistency of the linear vibration motor. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the foam structure in the embodiment of the present invention;

[0021] Figure 2 Top view of the foam structure in the embodiment of the present invention;

[0022] Figure 3 Assembly diagram of the foam, the oscillator assembly and the metal elastic sheet in the embodiment of the present invention;

[0023] Figure 4 For Figure 3 Assembly diagram from another perspective;

[0024] Figure 5 Exploded view of a part of the linear vibration motor;

[0025] Figure 6 Top view of a part of the linear vibration motor.

[0026] Explanation of reference numerals:

[0027] 100 - Linear vibration motor;

[0028] 10 - Foam structure, 11 - First side, 12 - Third side, 13 - Fifth side, 14 - Through groove, 15 - Groove bottom, 16 - Side wall;

[0029] 20 - Metal elastic sheet, 21 - First connecting portion, 22 - Second connecting portion, 23 - Vibration arm;

[0030] 30 - Oscillator assembly, 40 - Housing. Specific embodiments

[0031] The following will describe the exemplary embodiments of the present invention in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0032] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0033] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer or section discussed below may be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0034] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "upper", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0035] The present utility model provides a foam structure 10 for a linear vibration motor 100, which improves the assembly consistency of the foam in the linear vibration motor 100 by improving the structure, thereby improving the

[0036] Refer to Figures 1-6, an embodiment of the present utility model provides a foam structure 10, which is used for a linear vibration motor 100. The linear vibration motor 100 includes a housing 40 and a vibrator assembly 30 supported in the housing 40 by a metal shrapnel 20. The foam structure 10 includes a foam body, and the foam body includes a bottom wall and two opposite side walls. A through groove parallel to the two side walls is provided between the two side walls; wherein, one side wall 11 is connected to the vibrator assembly 30, the through groove 14 houses the metal shrapnel 20, the metal shrapnel 20 is clamped between the two side walls, and is adaptively positioned with the metal shrapnel 20 through the bottom wall 15 of the through groove 14 in the non-vibration direction.

[0037] Specifically, the foam structure is an integral structure, and specifically includes a first side surface 11 and a second side surface oppositely arranged along its length direction, a third side surface 12 and a fourth side surface oppositely arranged along its width direction, and a fifth side surface 13 and a sixth side surface arranged along its thickness direction. Among them, the first side surface 11 and the second side surface form the two side walls of the foam body, and the third side surface 12 forms the bottom wall of the foam body. A through groove 14 parallel to the two side walls is provided on the bottom wall, that is, the third side surface 12 is provided with a groove structure, and one end of the groove structure extends to the fifth side surface 13, and the other end extends to the sixth side surface, so as to form a through groove 14 penetrating the fifth side surface 13 and the sixth side surface.

[0038] During assembly, first assemble the vibrator assembly 30 and the metal shrapnel 20, and then assemble the foam structure 10. Specifically, first, the through groove 14 of the foam structure 10 is clamped on the metal shrapnel 20, and the first side surface 11 is adapted to the end surface of the vibrator assembly 30 along the vibration direction. Then, adjust the position of the foam structure 10, and make the bottom wall 15 of the through groove 14 abut against the side surface of the metal shrapnel 20 parallel to the vibration reverse direction, so as to realize the positioning of the foam structure 10 in the non-vibration direction. Since the foam structure 10 is connected to the vibrator assembly 30 in the vibration direction for positioning and connected to the metal shrapnel 20 in the non-vibration direction for positioning, the precise assembly of the foam structure 10 and the vibrator assembly 30 can be realized, thereby realizing the assembly consistency of the foam structure 10 and the performance consistency of the linear vibration motor 100.

[0039] The foam structure 10 provided by the present utility model includes a bottom wall and two opposite side walls in the foam body, and a through groove 14 parallel to the two side walls is provided on the bottom wall. During assembly, the side walls can be connected to the end surface of the vibrator assembly 30, the through groove 14 is clamped on the metal shrapnel 20, and the bottom of the through groove is adapted to the metal shrapnel 20 to realize the positioning in the non-vibration direction, thereby realizing the precise assembly of the foam structure 10 and the vibrator assembly 30, realizing the assembly consistency of the foam structure 10, and ensuring the performance consistency of the linear vibration motor 100.

[0040] In a specific embodiment of the present utility model, the depth l of the through groove 14 and the thickness L of the foam satisfy: 0.5L ≤ l ≤ 0.8L. Specifically, the length l of the through groove 14 is l = 0.5L, l = 0.6L, l = 0.7L or l = 0.8L, and the depth of the through groove 14 is substantially the same as the width of the vibrating arm 23 in the metal elastic sheet 20. In this way, the foam structure 10 can completely clamp the corresponding part of the metal elastic sheet 20 in the through groove 14, thereby ensuring that the metal elastic sheet 20 is subjected to a damping effect in the non-vibrating direction.

[0041] In a specific embodiment of the present utility model, the foam body is arranged in a cuboid shape. In this way, it is convenient to process the foam body. Of course, in other embodiments, the foam structure 10 can also be other polyhedron structures, which can be specifically set according to needs.

[0042] In a specific embodiment of the present utility model, the through groove 14 is a through groove processed by a die cutter, or the through groove 14 is a through groove cut by a laser. Specifically, the through groove 14 can be obtained by die cutter processing, or the through groove 14 can be obtained by laser cutting. Through the above two processing methods, the processing efficiency and processing accuracy of the through groove 14 can be improved.

[0043] In a specific embodiment of the present utility model, the metal elastic sheet 20 includes a first connecting portion 21, a second connecting portion, and a vibrating arm 23 connecting the first connecting portion 21 and the second connecting portion 22. The vibrating arm 23 includes two elastic arms arranged in a V shape or a U shape. Since the vibrating arm 23 includes two elastic arms, a plane can be positioned in the direction parallel to the vibrating direction through the two elastic arms, and the plane is adapted and positioned with the bottom 15 of the through groove 14. In this way, the positioning accuracy of the foam structure 10 can be further improved, and the assembly consistency of the foam can be improved.

[0044] In a specific embodiment of the present utility model, the two side walls are perpendicular to the bottom wall. Specifically, the two side walls 16 of the through groove 14 are parallel to the two side walls, and the bottom 15 of the through groove 14 is perpendicular to the two side walls. That is, the bottom 15 of the through groove 14 is perpendicular to the side wall 16 of the through groove 14, and the side wall 16 of the through groove 14 is parallel to the first side surface 11. In this way, the influence of the through groove 14 structure on the assembly positioning can be further reduced, and the positioning accuracy and assembly consistency can be improved.

[0045] In a specific embodiment of the present utility model, the thickness of the side wall close to the oscillator assembly is smaller than the thickness of the other side wall. That is, the distance from the through groove 14 to the first side surface 11 is smaller than the distance from it to the second side surface. In this way, sufficient damping can be ensured between the metal elastic sheet 20 and the oscillator assembly 30, and between the metal elastic sheet 20 and the inner wall surface of the housing 40.

[0046] In a second aspect of the present utility model, a linear vibration motor 100 is provided, which includes a housing 40, a vibrator assembly 30, a stator assembly, a metal shrapnel 20, and the foam structure 10 of any one of the above. The stator assembly is fixed inside the housing 40. The vibrator assembly 30 is suspended and supported inside the housing 40 by a pair of metal shrapnels 20. There are two foam structures 10, which are arranged on both sides of the vibrator assembly 30 along the vibration direction. One side wall of each foam body is connected to the vibrator assembly 30. The through groove 14 is clamped on the metal shrapnel 20, and is adaptively positioned with the metal shrapnel 20 through the bottom 15 of the through groove 14 in the non-vibration direction.

[0047] Specifically, the housing 40 includes an upper shell forming an open cavity and a lower shell covering the opening of the open cavity. The upper shell and the lower shell are adapted to form a receiving cavity. The stator assembly includes a circuit board and a coil electrically connected to the circuit board. The circuit board and the coil are both connected to the lower shell. The vibrator assembly 30 includes a mass block and a magnet connected as a whole. The metal shrapnels 20 are arranged in pairs. Along the long axis direction of the linear vibration motor 100, the paired metal shrapnels 20 are arranged at both ends of the vibrator assembly 30, and each metal shrapnel 20 is connected to the inner wall surface of the housing 40 through a first connecting portion 21 and to the outer side surface of the vibrator assembly 30 through a second connecting portion 22. In this way, the vibrator assembly 30 is suspended and supported inside the housing 40, and the vibrator assembly 30 can vibrate along the long axis direction of the linear vibration motor 100 under the drive of the energized coil.

[0048] The number of the foam structures 10 is two, and the specific structure refers to the above-mentioned embodiment. The two foam structures 10 are arranged at both ends of the vibrator assembly 30, and are respectively connected to the vibrator assembly 30 through the first side surface 11, clamped on the vibrating arm 23 of the metal shrapnel 20 through the through groove 14 to achieve positioning in the non-vibration direction, and abutted or arranged with a gap against the inner wall surface at the corresponding position of the housing 40 through the second side surface, so as to provide vibration damping for the vibrator assembly 30.

[0049] In the linear vibration motor 100 of this embodiment, by setting the foam structure 10 with the above structure, the assembly consistency of the foam structure 10 can be improved, and further the performance consistency of the linear vibration motor 100 can be ensured.

[0050] In a specific embodiment of the present utility model, glue application surfaces are provided at both ends of the vibrator assembly 30, and the vibrator assembly 30 is bonded to the side wall through the glue application surfaces.

[0051] Specifically, glue is applied to the end surface of the vibrator assembly 30, and the first side surface 11 of the foam structure 10 is bonded to the vibrator assembly 30 through glue.

[0052] In a third aspect of the present utility model, there is also provided an electronic device, including the linear vibration motor 100 described in any one of the above. The structure of the linear vibration motor 100 refers to the above embodiments. Since the electronic device has the linear vibration motor 100 in all the above embodiments, it necessarily has all the beneficial effects of the above linear vibration motor 100.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A foam structure, the foam structure is used for a linear vibration motor, the linear vibration motor comprises a housing and a vibrator assembly supported in the housing by a metal spring, characterized in that: It comprises a foam body, wherein the foam body comprises a bottom wall and two side walls arranged opposite to each other, and a through groove parallel to the two side walls is arranged between the two side walls; Among them, one of the side walls is used to connect with the vibrator assembly, the through groove is used to accommodate the metal spring, the metal spring is clamped between the two side walls, and the foam structure is against the metal spring through the bottom of the through groove to adapt and position in the non-vibration direction.

2. The foam structure according to claim 1, characterized in that: The depth l of the through groove and the thickness L of the foam satisfy: 0.5L≤l≤0.8L.

3. The foam structure according to claim 1, characterized in that: The foam body is arranged in a rectangular parallelepiped.

4. The foam structure according to claim 1, characterized in that: The through groove is a through groove processed by a die cutter, or the through groove is a through groove cut by a laser.

5. The foam structure according to claim 1, characterized in that: The metal spring sheet includes a first connection portion, a second connection portion and a vibration arm connecting the first connection portion and the second connection portion. The vibration arm includes two elastic arms arranged in a V-shape or a U-shape. The elastic arms are located in the through slot.

6. The foam structure according to claim 1, characterized in that: The two side walls are arranged perpendicularly to the bottom wall.

7. The foam structure according to claim 6, characterized in that: The thickness of the side wall close to the vibrator assembly is smaller than the thickness of the other side wall.

8. A linear vibration motor, characterized in that: It includes a shell, a vibrator assembly, a stator assembly, a metal spring and the foam structure described in any one of claims 1 to 7, wherein the stator assembly is fixed in the shell, and the vibrator assembly is suspended and supported in the shell by the metal springs arranged in pairs, there are two foam structures, which are arranged on both sides of the vibrator assembly along the vibration direction, and one side wall of each foam body is connected to the vibrator assembly, the through groove is clamped on the metal spring, and is adapted and positioned with the metal spring in the non-vibration direction through the bottom of the through groove.

9. The linear vibration motor according to claim 8, characterized in that: Both ends of the vibrator assembly are provided with a glue-coated surface, and the vibrator assembly is bonded to the side wall through the glue-coated surface.

10. An electronic device, characterized in that: A linear vibration motor comprising any one of claims 8 to 9.

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