Vibration motor

Abstract

A vibration motor (100), comprising spring brackets (3), a vibrator (2) connected to the spring brackets (3), and a housing (1) accommodating the spring brackets (3) and the vibrator (2). Each spring bracket (3) comprises a fixing part (33) connected to the vibrator (2), an elastic arm (32) extending from the fixing part (33), and a joint part (31) extending from the elastic arm (32) and connected to the housing (1); the fixing part (33) is provided with a first surface (331) connected to the vibrator (2), a second surface (332) opposite to the first surface (331), and a first side surface (333) connecting the first surface (331) and the second surface (332) and abutting against the vibrator (2); and the second surface (332) is provided with a first soldering piece (5) that is provided with a second side surface (51) arranged corresponding to the first side surface (333), and the second side surface (51) is spaced apart from the vibrator (2). According to the vibration motor (100), the first soldering pieces (5) do not interfere with the abutting cooperation of the fixing parts (33) and the vibrator (2), reducing the position precision requirements for soldering the spring brackets (3) and the first soldering pieces (5), and eliminating the influence of the soldering pieces on the product performance and the yield.

Description

Vibration motor Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a vibration motor. Background Art

[0002] With the development of science and technology and the progress of society, portable electronic products such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are widely used in people's daily lives. In some usage scenarios of these electronic products, such as incoming call prompts, message prompts, navigation prompts on mobile phones, and vibration feedback on game consoles, they are generally achieved through vibration motors.

[0003] The vibration motor of the related art includes a spring bracket and a vibrator connected to the spring bracket. The spring bracket includes a fixing portion connected to the vibrator. The outer surface of the fixing portion is provided with a welding piece for welding the vibrator and the fixing portion. To ensure the reliability of the vibrator during vibration, the side of the fixing portion needs to be abutted against the vibrator. However, the welding piece in the related art is flush with the edge of the fixing portion, and the welding piece and the side of the fixing portion abut against the vibrator at the same time. The positional accuracy of the welding piece and the fixing portion is very high. The position of the welding piece often results in poor abutment between the fixing portion and the vibrator, affecting the performance and yield of the product.

[0004] Therefore, it is necessary to provide a product that solves the above problems. Technical issues

[0005] The purpose of the utility model is to provide a vibration motor to eliminate the influence of welding pieces on product performance and yield, and to improve the performance and yield of the vibration motor. Technical Solutions

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a vibration motor, which includes a spring bracket, a vibrator connected to the spring bracket, and a shell for accommodating the spring bracket and the vibrator, the spring bracket includes a fixed portion connected to the vibrator, an elastic arm extending from the fixed portion, and a joining portion extending from the elastic arm and connected to the shell, the fixed portion is provided with a first surface connected to the vibrator, a second surface opposite to the first surface, and a first side surface connecting the first surface and the second surface and abutting against the vibrator, the second surface is provided with a first welding piece, the first welding piece is provided with a second side surface arranged corresponding to the first side surface, and the second side surface is spaced apart from the vibrator.

[0007] Preferably, the joint portion is provided with a third surface opposite to the vibrator, and the third surface is provided with a second welding piece.

[0008] Preferably, a damping member is provided between the vibrator and the elastic arm, the vibrator is provided with a slot, and the damping member is at least partially embedded in the slot.

[0009] Preferably, the vibrator includes a mass block with an accommodating space and a magnet fixed in the accommodating space, the shell includes an upper cover and a bottom plate covering the upper cover, the vibration motor also has a stator for driving the vibrator to move and a circuit board for feeding power to the stator, and the stator and the circuit board are fixed on the bottom plate.

[0010] Preferably, the accommodating space has a groove for accommodating the magnetic steel, the magnetic steel is fixed in the groove, and a magnetic conductive plate is further sandwiched between the magnetic steel and the mass block.

[0011] Preferably, the stator includes a magnetic conductive structure fixed to a bottom plate and a coil wound around the magnetic conductive structure, and the stator is at least partially accommodated in the accommodating space.

[0012] Preferably, the vibration motor further includes a limiting block fixed to the base plate. Beneficial effects

[0013] In the novel vibration motor of the present utility model, the fixing portion of the spring bracket has a first surface that contacts the vibrator, a second surface opposite the first surface, and a first side surface connecting the first and second surfaces and abutting the vibrator. The second surface is provided with a first welding tab, and the first welding tab has a second side surface corresponding to the first side surface, with the second side surface spaced apart from the vibrator. In this structure, the first welding tab does not interfere with the abutting fit between the fixing portion and the vibrator, reducing the positional accuracy requirements when welding the spring bracket to the first welding tab, ensuring the abutting fit between the spring bracket and the vibrator, thereby eliminating the impact of the welding tab on product performance and yield, and improving the performance and yield of the vibration motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art in the field of the present invention, other drawings can be obtained based on these drawings without creative work. Among them:

[0015] FIG1 is a perspective view of a vibration motor of the present invention;

[0016] FIG2 is an exploded perspective view of the vibration motor of the present invention;

[0017] FIG3 is a cross-sectional view taken along the AA direction in FIG1 ;

[0018] FIG4 is an enlarged view of portion B in FIG3 . Modes for Carrying Out the Invention

[0019] 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 embodiments described 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 the field of the present invention without making creative efforts are within the scope of protection of the present invention.

[0020] 1-4 , the present invention provides a vibration motor 100 , which includes a housing 1 , a vibrator 2 accommodated in the housing, and a spring bracket 3 , one end of which is connected to the housing 1 and the other end of which is connected to the vibrator 2 and suspends the vibrator 2 in the housing 1 ; the spring bracket 3 is arranged on both sides of the vibrator 2 along the vibration direction of the vibrator 2 .

[0021] The housing 1 consists of an upper cover 11 and a bottom plate 12 covering the upper cover 11. The stator 7 and the circuit board 8 for feeding power to the stator 7 are fixed on the bottom plate 12. When energized, the stator 7 generates a magnetic field, which reacts on the vibrator 2 under the action of the magnetic field, causing the vibrator 2 to reciprocate under the support of the spring bracket 3.

[0022] The vibrator 2 includes a mass block 23 and a magnet 21 . The mass block 23 defines a receiving space 231 . The receiving space 231 defines a groove 233 for receiving the magnet 21 . A magnetic conductive plate 22 is sandwiched between the magnet 21 and the mass block 23 .

[0023] The spring bracket 3 includes a fixing portion 33 connected to the vibrator 2 , an elastic arm 32 extending from the fixing portion 33 , and a joining portion 31 extending from the elastic arm 32 and connected to the housing 1 .

[0024] The fixing portion 33 is provided with a first surface 331 connected to the vibrator 2, a second surface 332 opposite to the first surface 331, and a first side surface 333 connecting the first surface 331 and the second surface 332 and abutting the vibrator 2. The second surface 332 is provided with a first welding piece 5, and the first welding piece 5 is provided with a second side surface 51 corresponding to the first side surface 333. As shown in Figure 4, the second side surface 51 is spaced apart from the vibrator 2. The first welding piece 5 will not interfere with the abutting fit between the fixing portion 33 and the vibrator 2, thereby reducing the position accuracy requirement when welding the spring bracket 3 and the first welding piece 5, ensuring the abutting fit between the spring bracket 3 and the vibrator 2, thereby eliminating the influence of the welding piece on the product performance and yield, and improving the performance and yield of the vibration motor.

[0025] A damping member 4 is provided between the elastic arm 32 and the vibrator 2, and the mass block 23 is provided with a slot 232. The damping member 4 is at least partially embedded in the slot 232. During the repeated movement of the vibrator 2, the presence of the damping member 4 can make the movement of the vibrator 2 softer and more stable.

[0026] The joint portion 31 is provided with a third surface 311 opposite to the vibrator 2 . The third surface 311 is provided with a second welding piece 6 . The joint portion 31 is connected to the housing 1 via the second welding piece 6 .

[0027] The stator 7 includes a magnetic conductive structure 71 fixed to the bottom plate 12 . The magnetic conductive structure 71 is in an I-shape along the AA cross-section. The coil 72 is wound around the narrower portion of the magnetic conductive structure 71 . The stator 7 is accommodated in the accommodating space 231 .

[0028] The vibration motor 100 further includes a limit block 121 fixed to the bottom plate 12 , and the limit block 121 limits the displacement of the vibrator 2 .

[0029] Compared with the related art, the first welding piece in the present invention will not interfere with the abutment fit between the fixing part and the vibrator, thereby reducing the position accuracy requirement when welding the spring bracket and the first welding piece, ensuring the abutment fit between the spring bracket and the vibrator, thereby eliminating the influence of the welding piece on product performance and yield, and improving the performance and yield of the vibration motor.

[0030] The above is only an implementation method of the present invention. It should be pointed out that for ordinary technicians in the field of the present invention, improvements can be made without departing from the creative concept of the present invention, but these all fall within the scope of protection of the present invention.

Claims

1. A vibration motor, comprising a spring bracket, a vibrator connected to the spring bracket, and a housing for accommodating the spring bracket and the vibrator, wherein the spring bracket comprises a fixing portion connected to the vibrator, an elastic arm extending from the fixing portion, and a joint portion extending from the elastic arm and connected to the housing, the fixing portion is provided with a first surface connected to the vibrator, a second surface opposite to the first surface, and a first side surface connecting the first surface and the second surface and abutting against the vibrator, characterized in that: The second surface is provided with a first welding piece, the first welding piece is provided with a second side surface corresponding to the first side surface, and the second side surface is spaced apart from the vibrator.

2. The vibration motor according to claim 1, characterized in that: The joint portion is provided with a third surface opposite to the vibrator, and the third surface is provided with a second welding piece.

3. The vibration motor according to claim 1, characterized in that: A damping member is provided between the vibrator and the elastic arm, the vibrator is provided with a slot, and the damping member is at least partially embedded in the slot.

4. The vibration motor according to claim 1, characterized in that: The vibrator includes a mass block with a accommodating space and a magnet fixed in the accommodating space, the shell includes an upper cover and a bottom plate covering the upper cover, the vibration motor also includes a stator for driving the vibrator to move and a circuit board for feeding power to the stator, and the stator and the circuit board are fixed on the bottom plate.

5. The vibration motor according to claim 4, characterized in that: The accommodating space has a groove for accommodating the magnetic steel, the magnetic steel is fixed in the groove, and a magnetic conductive plate is sandwiched between the magnetic steel and the mass block.

6. The vibration motor according to claim 4, characterized in that: The stator comprises a magnetic conductive structure fixed on a bottom plate and a coil wound around the magnetic conductive structure. The stator is at least partially accommodated in the accommodation space.

7. The vibration motor according to claim 4, characterized in that: The vibration motor also includes a limiting block fixed to the bottom plate.

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