Vibration motor

Abstract

The present invention discloses a vibration motor. The vibration motor includes: a base plate; a circuit board disposed on the base plate; an electromagnet disposed on the base plate, the electromagnet including an iron core and a coil surrounding the iron core, the coil being electrically connected to the circuit board; a counterweight movably positioned above the base plate; a magnet assembly disposed on the counterweight, the magnet assembly cooperating with the coil to drive the counterweight to vibrate; and a damping rubber block connecting the counterweight and the base plate; the damping rubber block is used to provide a restoring rebound force to the counterweight. Compared with the prior art, the present invention provides a simpler installation structure and smaller assembly and movement space.

Description

Technical Field

[0001] The embodiments of the present invention relate to a vibration device, and in particular to a vibration motor. Background Art

[0002] Nowadays, widespread electronic products, such as mobile phones, tablets, and game console controllers, all have vibration functions, which are frequently used. Therefore, suitable vibration components, such as vibration motors, are needed in these electronic devices. However, existing vibration motors use reeds to reset during vibration. These reeds need to be fixed to a carrier and the interior of the entire product, requiring more assembly space and movement space, and resulting in a complex connection structure. Summary of the Invention

[0003] An object of the embodiments of the present invention is to provide a vibration motor with a simple installation structure and a small assembly space and movement space.

[0004] To solve the above technical problems, an embodiment of the present invention provides a vibration motor, comprising:

[0005] base plate;

[0006] A circuit board is arranged on the bottom plate;

[0007] an electromagnet, disposed on the bottom plate, comprising an iron core and a coil surrounding the iron core, wherein the coil is electrically connected to the circuit board;

[0008] a counterweight block, the counterweight block being movably located above the bottom plate;

[0009] a magnet assembly, disposed on the counterweight block, the magnet assembly cooperating with the coil to drive the counterweight block to vibrate; and

[0010] A damping rubber block is connected to the counterweight block and the bottom plate; and the damping rubber block is used to provide a reset rebound force to the counterweight block.

[0011] Compared to the existing technology, the present invention utilizes a magnet assembly and an electromagnet to vibrate the counterweight. A damping rubber block is also provided to provide a rebound force to the counterweight, allowing it to return to its original position. The block-shaped structure of the damping rubber block provides multi-directional rebound force, reducing assembly and movement space, making the vibration motor smaller and eliminating the need for additional components for installation. This makes installation of the damping rubber block simpler and more convenient.

[0012] In one embodiment, a first mounting groove is provided on the counterweight block; the magnet assembly is fixed in the first mounting groove, the electromagnet is located in the first mounting groove, and the magnet assembly is located between the electromagnet and the side wall of the first mounting groove.

[0013] In one embodiment, the magnet assembly includes: a pair of power magnets disposed opposite to each other, and a pair of starting magnets disposed opposite to each other; the pair of power magnets and the pair of starting magnets surround the electromagnet;

[0014] A pair of power magnets are respectively located at two ends of the axial direction of the electromagnet, and a pair of starting magnets are respectively located at two ends of the axial direction perpendicular to the electromagnet.

[0015] In one embodiment, the magnet assembly further includes: a patch attached to the outside of each of the power magnets and a fixing plate attached to the outside of each of the starting magnets, and both the patch and the fixing plate are used to prevent magnetic leakage.

[0016] In one embodiment, the central axis of the first installation slot is coaxial with the central axis of the counterweight.

[0017] In one embodiment, a second mounting groove is formed at the bottom of the counterweight block, the top of the damping rubber block is fixed to the second mounting groove, and the bottom of the damping rubber block is fixed to the bottom plate.

[0018] In one embodiment, a pair of second mounting slots are provided and are arranged opposite to each other along the axis of the electromagnet, and each of the mounting slots is located at an edge of the counterweight block;

[0019] A pair of the damping rubber blocks are provided, and one of the damping rubber blocks is provided in one of the second installation grooves.

[0020] In one embodiment, a groove for avoiding the circuit board is provided at the bottom of the counterweight block; and a mounting positioning hole is provided at the bottom of the counterweight block.

[0021] In one embodiment, the vibration motor further comprises: a housing sleeved outside the counterweight;

[0022] A limiting rubber block is arranged in the shell, and the limiting rubber block is arranged on a pair of inner walls of the shell that are arranged opposite to each other along the axis direction of the electromagnet.

[0023] In one embodiment, the lower edge of the housing has a protruding snap-fitting portion, the edge of the bottom plate has a recessed area, and the protruding snap-fitting portion is operably snapped into the recessed area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 is an exploded view of the housing and the counterweight separated according to one embodiment of the present invention;

[0026] Figure 2 is an exploded view of the counterweight block and the base plate separated according to one embodiment of the present invention;

[0027] Figure 3 is an exploded view of a vibration motor according to one embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of a counterweight according to an embodiment of the present invention;

[0029] Figure numerals: 1. bottom plate; 11. recessed area; 2. circuit board; 3. electromagnet; 31. coil; 32. iron core; 4. counterweight; 5. magnet assembly; 51. power magnet; 52. starting magnet; 53. patch; 54. fixing plate; 6. damping rubber block; 41. first mounting slot; 42. second mounting slot; 43. mounting positioning hole; 7. outer shell; 71. protruding clip; 8. limiting rubber block. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be implemented.

[0031] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, that is, should be interpreted to mean "including, but not limited to."

[0032] The following will describe in detail various embodiments of the present invention in conjunction with the accompanying drawings to provide a clearer understanding of the objectives, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0033] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0034] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0035] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0037] The first embodiment of the present invention relates to a vibration motor. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the vibration motor includes: a base plate 1, a circuit board 2, an electromagnet 3, a counterweight 4, a magnet assembly 5 and a damping rubber block 6. The circuit board 2 is arranged on the base plate 1, and the electromagnet 3 is arranged on the base plate 1. The electromagnet 3 includes: an iron core 32 and a coil 31 surrounding the iron core 32, and the coil 31 is electrically connected to the circuit board 2. The counterweight 4 is movably located above the base plate 1. The magnet assembly 5 is arranged on the counterweight, and the magnet assembly 5 cooperates with the coil 31 to drive the counterweight 4 to vibrate. The magnet assembly 5 is fixed on the counterweight 4, and the counterweight 4 is moved back and forth rapidly through the cooperation of the coil 31 and the magnet assembly 5, thereby generating a sense of vibration. The damping rubber block 6 connects the counterweight 4 and the base plate 1, and the damping rubber block 6 is used to provide a reset rebound force to the counterweight 4.

[0038] From the above, it is not difficult to see that the counterweight 4 vibrates through the cooperation of the magnet assembly 5 and the electromagnet 3. In addition, a damping rubber block 6 is provided to provide a rebound force to the counterweight 4, allowing the counterweight 4 to return to its original position. The block-shaped structure of the damping rubber block 6 can provide multi-directional rebound force, which reduces the assembly space and movement space, making the vibration motor smaller in size. No other components are required to assist in installation, making the installation of the damping rubber block 6 simpler and more convenient.

[0039] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a first mounting groove 41 is provided on the counterweight 4 , the magnet assembly 5 is fixed in the first mounting groove 41 , the electromagnet 3 is located in the first mounting groove 41 , and the magnet assembly 5 is located between the electromagnet 3 and the side wall of the first mounting groove 41 .

[0040] In addition, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the magnet assembly 5 includes: a pair of power magnets 51 arranged opposite to each other, and a pair of starting magnets 52 arranged opposite to each other. The pair of power magnets 51 and the pair of starting magnets 52 surround the electromagnet 3. The pair of power magnets 51 are respectively located at the axial ends of the electromagnet 3, and the pair of starting magnets 52 are respectively located at the axial ends perpendicular to the electromagnet 3. After the electromagnet 3 composed of the coil 31 and the iron core 32 is energized, an attractive force and a repulsive force will be generated at its two ends respectively. Under this force, the counterweight 4 and the magnet assembly 5 will move in one direction, and then the direction of the current in the coil 31 will be changed through the circuit board 2, so that the magnetism of the electromagnet 3 will change, and the counterweight 4 and the magnet assembly 5 will move in the other direction, and so on and so forth, thereby realizing the vibration motor driving operation of the electromagnet 3 structure. At the initial stage of starting the vibration motor, the electromagnet 3 is located in the middle position of the two power magnets 51, and the magnetic attraction between them is weak. At this time, the coil 31 can be matched with the two starting magnets 52, and the counterweight 4 and the magnet assembly 5 are started under the action of the Lorentz force. After the counterweight 4 moves, the magnetic relationship between the electromagnet 3 and the power magnet 51 causes the counterweight 4 to reciprocate.

[0041] In addition, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the magnet assembly 5 further includes: patches 53 attached to the outside of each power magnet 51 and fixing sheets 54 attached to the outside of each starting magnet 52. The patches 53 and fixing sheets 54 are both used to prevent magnetic leakage and ensure the magnetic effect of the magnet assembly 5. The patches 53 and fixing sheets 54 are fixedly attached to the side walls of the first mounting slot 41.

[0042] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the central axis of the first mounting slot 41 is coaxial with the central axis of the counterweight 4. Specifically, the first mounting slot 41 is provided in the middle of the counterweight 4 for mounting the magnet assembly 5. The iron core 32 and the coil 31 extend from the bottom end of the first mounting slot 41 into the first mounting slot 41 and are located at the center of the magnet assembly 5. To allow the counterweight 4 to vibrate back and forth, a clearance is provided between the iron core 32 and the magnet assembly 5.

[0043] In addition, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a second mounting groove 42 is defined at the bottom of the counterweight 4. The top of the damping rubber block 6 is secured to the second mounting groove 42, while the bottom of the damping rubber block 6 is secured to the base plate 1. Second mounting grooves 42 are defined on both sides of the bottom end of the counterweight 4. Damping rubber blocks 6 are mounted within the second mounting grooves 42. The top of the damping rubber block 6 is adhesively bonded to the counterweight 4, while the bottom of the damping rubber block 6 is adhesively bonded to the base plate 1. When the counterweight 4 reciprocates, the damping rubber block 6 can, under the action of elasticity, assist in resetting and rebounding.

[0044] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a pair of second mounting grooves 42 are provided and are arranged oppositely along the axis of the electromagnet 3, and each installation is located at the edge of the counterweight 4. A pair of damping rubber blocks 6 are provided, and one damping rubber block 6 is provided in one second mounting groove 42.

[0045] In addition, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the bottom of the counterweight 4 is provided with a clearance groove for the circuit board 2, which is used to avoid and limit the installation position of the circuit board 2. The bottom of the counterweight 4 is provided with installation positioning holes 43. Two installation positioning holes 43 are set at the bottom end of the counterweight 4 for installation and positioning operations during assembly production.

[0046] Furthermore, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the vibration motor further includes a housing 7 that is sleeved over the counterweight 4. Within the housing 7 are rubber limiters 8, located on a pair of inner walls of the housing 7 that are positioned opposite each other along the axis of the electromagnet 3. These limiters 8 act as buffers and limiters during the reciprocating motion of the counterweight 4, preventing it from colliding with the inner walls of the housing 7 and limiting the travel distance of the counterweight 4.

[0047] In addition, if Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the lower edge of the housing 7 has a protruding snap-fit ​​portion 71, and the edge of the base plate 1 has a recessed area 11, and the protruding snap-fit ​​portion 71 can be operably snapped into the recessed area 11, thereby achieving the fixation of the housing 7 and the base plate 1.

[0048] While preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0049] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0050] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for realizing the invention, and in actual applications, various changes may be made thereto in form and details without departing from the spirit and scope of the invention.

Claims

1. A vibration motor, characterized in that: include: base plate; A circuit board is arranged on the bottom plate; an electromagnet, disposed on the bottom plate, comprising an iron core and a coil surrounding the iron core, wherein the coil is electrically connected to the circuit board; a counterweight block, the counterweight block being movably located above the bottom plate; a magnet assembly, disposed on the counterweight block, the magnet assembly cooperating with the coil to drive the counterweight block to vibrate; and A damping rubber block, the damping rubber block connecting the counterweight block and the bottom plate; and the damping rubber block is used to provide a restoring resilience force to the counterweight block; The counterweight block is provided with a first mounting slot; the magnet assembly is fixed in the first mounting slot, the electromagnet is located in the first mounting slot, and the magnet assembly is located between the electromagnet and the side wall of the first mounting slot; The magnet assembly includes: a pair of power magnets arranged opposite to each other, and a pair of starting magnets arranged opposite to each other; the pair of power magnets and the pair of starting magnets surround the electromagnet; A pair of the power magnets are respectively located at two ends of the axial direction of the electromagnet, and a pair of the starting magnets are respectively located at two ends of the axial direction perpendicular to the electromagnet; The magnet assembly further includes: a patch attached to the outside of each of the power magnets and a fixing plate attached to the outside of each of the starting magnets, wherein both the patch and the fixing plate are used to prevent magnetic leakage; A second mounting groove is formed on the bottom edge of the counterweight block, the top of the damping rubber block is fixed to the second mounting groove, and the bottom of the damping rubber block is fixed to the bottom plate; The bottom of the counterweight block is provided with an avoidance groove for avoiding the circuit board; the bottom of the counterweight block is provided with an installation positioning hole; The vibration motor further comprises: a housing sleeved outside the counterweight; A limiting rubber block is arranged in the shell, and the limiting rubber block is arranged on a pair of inner walls of the shell that are arranged opposite to each other along the axis direction of the electromagnet.

2. The vibration motor according to claim 1, wherein The central axis of the first installation slot is coaxial with the central axis of the counterweight block.

3. The vibration motor according to claim 1, wherein A pair of second mounting grooves are provided and are arranged opposite to each other along the axis of the electromagnet, and each second mounting groove is located at the edge of the counterweight block; A pair of the damping rubber blocks are provided, and one of the damping rubber blocks is provided in one of the second installation grooves.

4. The vibration motor according to claim 1, wherein The lower edge of the shell is provided with a protruding clamping portion, the edge of the bottom plate is provided with a recessed area, and the protruding clamping portion is operably clamped into the recessed area.

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