CN211930427U - Miniature vibrating motor - Google Patents

Abstract

The utility model belongs to the technical field of micro motor, specifically a micro vibration motor, including casing, rotor subassembly, axle, eccentric portion and end cover, axle one end is stretched out the casing outer joint eccentric portion, and the axle other end is fixed in the end cover, and the terminal surface that the axle is located the end cover is the sphere, and this sphere is radius angle with axle wall hookup location, and the proportion of sphere radius and axle footpath sets up to 1-1.5, the utility model provides a pair of micro vibration motor, the rotation axis equipment degree of difficulty is low, reduced the resistance when vibration motor operates or the noise that probably produces.

Description

Miniature vibrating motor

Technical Field

The utility model belongs to the technical field of micro motor, especially, relate to a miniature vibrating motor.

Background

With the development of economy, electronic communication products, such as mobile communication products such as mobile phones, have been developed rapidly, and the electronic communication products are increasingly required to have the characteristics of lightness, thinness and miniaturization while pursuing high quality.

A vibration motor of an eccentric type is generally used, and includes a stator and an eccentric device rotating relative to the stator, and the eccentric device makes the center of gravity of an eccentric rotor not coincide with the axis of a rotating shaft, so that the eccentric rotor vibrates when rotating. However, the rotating shaft of the conventional vibration motor is difficult to assemble and is likely to generate noise.

Disclosure of Invention

An object of the utility model is to provide a miniature vibrating motor to solve among the prior art vibrating motor's the rotation axis equipment degree of difficulty big, produce the technical problem of noise easily.

In order to achieve the technical purpose, the utility model discloses use following technical scheme:

a miniature vibration motor comprises a machine shell, a rotor assembly, a shaft, an eccentric part and an end cover, wherein one end of the shaft extends out of the machine shell and is connected with the eccentric part, the other end of the shaft is fixed on the end cover, the end face of the shaft, which is positioned on the end cover, is a spherical surface, the connecting position of the spherical surface and the wall surface of the shaft is a fillet, and the ratio of the radius of the spherical surface to the diameter of the shaft is set to be 1-.

Further, the rotor assembly is fixed to the shaft, and the rotor assembly includes a commutator.

Furthermore, the end cover is provided with a groove for accommodating the commutator, the center of the bottom of the groove is provided with a mounting groove, the mounting groove is fixedly provided with a bearing, and the other end of the shaft is fixed on the end cover through the bearing.

Furthermore, an electric brush is installed on the inner wall of the groove of the end cover and used for supplying power to the rotor assembly, and a wiring terminal electrically connected with the electric brush is arranged on the end face of the outer side of the end cover.

Further, the end cap comprises a resin end cap.

Further, the casing is in a flat cylindrical shape.

The utility model provides a pair of miniature vibrating motor has following beneficial effect:

the rotating shaft of the vibration motor is innovatively designed, and particularly the end face of the rotating shaft close to the end cover is set to be a combination of a fillet and a spherical chamfer, so that the assembling difficulty of the rotating shaft is low, and the resistance or the noise possibly generated during the operation of the vibration motor is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a schematic sectional view of a micro vibration motor.

Fig. 2 is a schematic view of a conventional shaft structure.

Fig. 3 is a schematic axial structure diagram of the present embodiment.

Fig. 4 is an enlarged structural diagram of the shaft end face.

Fig. 5 is a left side view of the end face of the shaft.

Fig. 6 is a schematic perspective view of a part of the end cap.

Reference numerals: 100-shell, 200-shaft, 300-eccentric part, 400-end cover, 500-brush, 600-electric terminal, 700-bearing, 800-commutator, 201-fillet, 202-sphere, 401-groove and 402-mounting groove.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention will be combined below to describe the technical solution in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 6, a micro vibration motor includes a housing 100, a rotor assembly, a shaft 200, an eccentric portion 300, and an end cover 400, wherein one end of the housing 100 is open, the end cover 400 is fastened to the opening of the housing 100 and forms an accommodating space with the housing 100, and the eccentric portion 300 is located at an opposite end of the open end of the housing 100.

One end of the shaft 200 extends out of the casing 100 and is connected with the eccentric part 300, the other end of the shaft 200 is fixed on the end cover 400, the eccentric part 300 is provided with a shaft hole, the shaft 200 is fixedly connected with the eccentric part 300 through the shaft hole, most of the shaft 200 is arranged inside the casing 100, and the part of the shaft 200 extending out of the casing 100 is used for connecting and driving the eccentric part 300.

The end face of the shaft 200 at the end cap 400 is a spherical face 202, the connecting position of the spherical face 202 and the shaft wall face is a rounded corner 201, the ratio of the spherical radius to the shaft diameter is set to 1-1.5, and the shaft end face at the end cap 400 is a combination of the spherical face and the rounded corner, and it should be noted that in another embodiment, the outer diameter rounded corner and the inner diameter spherical corner of the end face of the shaft 200 may be combined into a spherical corner. As shown in fig. 2, the conventional shaft is not provided with the outer diameter round corner and the inner diameter spherical round corner of the end face of the shaft, the shaft is difficult to assemble, and after the shaft is assembled, the shaft may contact with the end cover, so that the contact area is large, the friction resistance in operation is large, after the round corner and the spherical round corner are increased, the contact area with the end face of the end cover is reduced, when the motor operates, the friction can be reduced, and the resistance in operation and the noise which may be generated are reduced. The end face of the rotating shaft close to the end cover is set to be the combination of the fillet and the spherical chamfer, so that the assembly difficulty of the rotating shaft of the miniature vibration motor is low, and the resistance or the possible noise generated when the vibration motor runs is reduced.

Further, the rotor assembly is fixed on the shaft 200, the rotor assembly includes a commutator 800, the shaft 200 passes through the rotor assembly, the commutator 800 is fixed at one end of the shaft 200 located at the end cap 400, the end cap 400 is provided with a groove 401 for accommodating the commutator 800, as shown in fig. 6, a mounting groove 402 is provided at a central position of a bottom of the groove 401, the groove 401 is located at one end of the end cap bearing 700 closer to the eccentric portion 300 than the mounting groove 402, the mounting groove 402 is fixedly provided with the bearing 700, the other end of the shaft 200 is fixed at the end cap 400 through the bearing 700, one end of the casing 100 close to the eccentric portion 300 is also provided with a bearing, and the shaft 200 is supported.

The brush 500 is mounted on the inner wall of the groove 401 of the end cap 400, the brush 500 is used for supplying power to the rotor assembly, the brush 500 is located at one end of the end cap bearing 700 closer to the eccentric portion 300, the outer end face of the end cap 400 is provided with a wiring terminal 600 electrically connected with the brush 500, the wiring terminal 600 at the outer side is used for connecting the miniature vibration motor with an external power supply, the end cap 400 comprises a resin end cap, the end cap 400 can also be made of other high polymer materials, and the casing 100 is in a flat cylindrical shape.

In addition, still be provided with stator module in the casing 100, stator module and rotor module are the interval setting each other, the rotor module still includes the coil, stator module includes the magnet, external power signal transmits the coil and forms the electric current, thereby the electromagnetic field that forms around the coil drives the rotor module with magnet interact down and rotates, and then drives rotation axis and eccentric portion and rotate, the focus of eccentric portion is inconsistent with the axle center of rotation axis, make miniature vibrating motor produce the vibration when rotating.

The miniature vibration motor provided by the embodiment has the advantages that:

1) the applicability is strong, and the miniature vibration motor can be applied to numerous electronic products, such as mobile phones, Bluetooth equipment, tablet computers and other devices needing a vibration reminding function.

2) The assembly efficiency is high, the end face of a rotating shaft of the miniature vibration motor is combined with a fillet and a spherical chamfer, the shaft position is not prone to deviation, and the shaft assembly efficiency is high during assembly.

3) The miniature vibration motor has low resistance and noise during operation, and the end face of the rotating shaft close to the end cover is set to be a combination of the fillet and the spherical chamfer, so that the friction can be reduced during the operation of the miniature vibration motor, and the resistance during the operation and the noise which can be generated are reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, but is provided for the purpose of facilitating understanding the method and the core concept thereof, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A miniature vibration motor comprises a machine shell, a rotor component, a shaft, an eccentric part and an end cover, and is characterized in that one end of the shaft extends out of the machine shell and is connected with the eccentric part, the other end of the shaft is fixed on the end cover, the end face of the shaft, which is positioned on the end cover, is a spherical surface, the connecting position of the spherical surface and the wall surface of the shaft is a fillet, and the ratio of the spherical surface radius to the shaft diameter is set to be 1-1.5.

2. A miniature vibration motor as defined in claim 1, wherein: the rotor assembly is fixed on the shaft and comprises a commutator.

3. A miniature vibration motor as defined in claim 1, wherein: the end cover is provided with a groove for accommodating the commutator, the center of the bottom of the groove is provided with a mounting groove, the mounting groove is fixedly provided with a bearing, and the other end of the shaft is fixed on the end cover through the bearing.

4. A miniature vibration motor as defined in claim 1, wherein: and an electric brush is arranged on the inner wall of the groove of the end cover and used for supplying power to the rotor assembly, and a wiring terminal electrically connected with the electric brush is arranged on the end face of the outer side of the end cover.

5. A miniature vibration motor as defined in claim 3 or 4, wherein: the end caps comprise resin end caps.

6. A miniature vibration motor as defined in claim 1, wherein: the casing is in a flat cylindrical shape.

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