A voice coil motor

Abstract

The utility model relates to the technical field of vibration motor, specifically relates to a voice coil motor, and the motor includes including shell, the bobbin of installing in the shell and the coil of installing at the outer side of bobbin, the bobbin is provided with the guide cavity along its length direction distribution, the guide cavity has the vibration module of swing connection, the vibration module includes the magnet and respectively located the magnetic block of magnet upper and lower both ends, the coil is used for driving magnet and carries out axial movement along the guide cavity, the voice coil motor still includes the buffer module, the buffer module connects between vibration module and shell or bobbin, the utility model discloses the purpose lies in providing a voice coil motor, has better vibration strength and vibration frequency, and has higher stability and durability, effectively reduces the vibration and noise in the working process.

Description

Technical Field

[0001] This utility model relates to the field of vibration motor technology, specifically to a voice coil motor. Background Technology

[0002] A voice coil motor is a linear drive device that converts electrical energy into mechanical energy using the principle of electromagnetic induction. It is widely used in optical devices, precision positioning, hard disk drives, and other fields. Its core working principle is to apply current to a energized coil, which generates a Lorentz force in a magnetic field, thereby driving the components connected to the coil to move axially.

[0003] Voice coil motors in the prior art typically include a fixed housing, inside which a permanent magnet or a set of permanent magnets is fixed. A winding frame is installed inside the housing, with a certain gap between it and the permanent magnets. When current passes through the coil on the winding frame, the coil moves in the magnetic field generated by the permanent magnets, thereby driving the winding frame and the connected drive components to achieve linear displacement.

[0004] However, traditional voice coil motors generally have the problem of weak vibration force and frequency, and generate significant vibration and noise during operation, which affects the performance of the equipment. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a voice coil motor with better vibration force and vibration frequency, as well as higher stability and durability, and to effectively reduce vibration and noise during operation.

[0006] This utility model is achieved through the following technical solution:

[0007] A voice coil motor includes a housing, a winding frame installed inside the housing, and a coil installed outside the winding frame. The winding frame is provided with guide cavities distributed along its length. A vibration module is movably connected within the guide cavity. The vibration module includes a magnet and magnetic blocks located at the upper and lower ends of the magnet. The coil is used to drive the magnet to move axially along the guide cavity. The voice coil motor also includes a buffer module connected between the vibration module and the housing or the winding frame.

[0008] The vibration module further includes a first pad and a second pad. The first pad has a T-shaped structure, and the columnar part of the first pad passes through a magnetic block, a magnet, and another magnetic block in sequence before connecting to the second pad.

[0009] The buffer modules are respectively connected between the first gasket and the outer shell or winding frame, and between the second gasket and the outer shell or winding frame.

[0010] The buffer module includes a first elastic element and a second elastic element. The first elastic element is connected between the first gasket and the outer shell or winding frame, and the second elastic element is connected between the second gasket and the outer shell or winding frame.

[0011] The first elastic element and the second elastic element are one or more combinations of rubber blocks, silicone pads, sponges or springs.

[0012] The coil is covered with a shielding cover.

[0013] The inner wall of the guide cavity is coated with a wear-resistant coating, and the magnetic block of the vibration module slides in contact with the wear-resistant coating.

[0014] The beneficial effects of this utility model are:

[0015] This utility model discloses a voice coil motor. By incorporating a magnet and a magnetic guide block, the magnetic guide block enhances the permeability and magnetic strength of the magnet, resulting in a better vibration force and frequency generated by the vibration module when the coil produces the same magnetic field. This effectively improves the performance of the voice coil motor. In addition, the buffer module effectively absorbs the impact force between the vibration module and the housing or winding frame, reducing vibration and noise during operation and extending the motor's service life. Attached Figure Description

[0016] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0017] Figure 1 This is an exploded view of the present invention.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure Labels

[0020] Outer shell -- 100, winding frame -- 101, coil -- 102, magnet -- 103, magnetic block -- 104, first gasket -- 105, second gasket -- 106, first elastic element -- 107, second elastic element -- 108, shielding cover -- 109. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] like Figure 1 and Figure 2 As shown, this embodiment discloses a voice coil motor, which includes a housing 100, a winding frame 101 installed inside the housing 100, and a coil 102 installed outside the winding frame 101.

[0025] The winding frame 101 is provided with guide cavities distributed along its length direction. A vibration module is movably connected in the guide cavity. The vibration module includes a magnet 103 and magnetic blocks 104 located at the upper and lower ends of the magnet 103 respectively. The coil 102 is used to drive the magnet 103 to move axially along the guide cavity.

[0026] The voice coil motor also includes a buffer module, which is connected between the vibration module and the housing 100 or the winding frame 101.

[0027] In this embodiment, the guide cavity extends through the entire winding frame 101. In one case, the winding frame 101 has an open structure at both ends, and the buffer module passes through the guide cavity and connects to the inner wall of the outer casing 100. In another case, the winding frame 101 has a hollow, sealed structure, and the buffer module passes through the guide cavity and connects to the inner wall of the winding frame 101.

[0028] By incorporating a magnet 103 and a magnetic guide block 104, the magnetic permeability and magnetic strength of the magnet 103 are enhanced by the magnetic guide block 104. This allows the vibration module to generate better vibration force and frequency when the coil 102 produces the same magnetic field, effectively improving the performance of the voice coil motor. In addition, the buffer module can effectively absorb the impact force between the vibration module and the housing 100 or the winding frame 101, reducing vibration and noise during operation and extending the service life of the motor.

[0029] Furthermore, the vibration module also includes a first pad 105 and a second pad 106. The first pad 105 has a T-shaped structure, and the columnar part of the first pad 105 passes through the magnetic block 104, the magnet 103, and the magnetic block 104 in sequence before connecting to the second pad 106.

[0030] The buffer modules are respectively connected between the first gasket 105 and the outer shell 100 or the winding frame 101, and between the second gasket 106 and the outer shell 100 or the winding frame 101.

[0031] In this embodiment, the magnetic block 104 can be used as a counterweight. A first pad 105 and a second pad 106 are added to the upper and lower sides of the magnetic block 104 for counterweight and for fixing the buffer module with screws at both ends. When the coil 102 outside the winding frame 101 is energized, it will generate a magnetic field that moves up and down with the magnet 103, and the vibration will move up and down. Thus, it can also be installed in the massager to realize the massage function by utilizing axial vibration. The coil 102 is covered with a shielding cover 109 to prevent electromagnetic interference.

[0032] In this embodiment, the buffer module includes a first elastic element 107 and a second elastic element 108. The first elastic element 107 is connected between the first gasket 105 and the housing 100 or the winding frame 101, and the second elastic element 108 is connected between the second gasket 106 and the housing 100 or the winding frame 101.

[0033] Preferably, the first elastic element 107 and the second elastic element 108 are one or more combinations of rubber blocks, silicone pads, sponges or springs.

[0034] The inner wall of the guide cavity is coated with a wear-resistant coating, and the magnetic block 104 of the vibration module slides in contact with the wear-resistant coating, thereby optimizing the wear resistance and assembly structure of the vibration module.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A voice coil motor, comprising a housing, a winding frame disposed within the housing, and a coil disposed outside the winding frame, characterized in that, The winding frame is provided with guide cavities distributed along its length. A vibration module is movably connected in the guide cavity. The vibration module includes a magnet and magnetic blocks located at the upper and lower ends of the magnet. The coil is used to drive the magnet to move axially along the guide cavity. The voice coil motor also includes a buffer module, which is connected between the vibration module and the housing or winding frame.

2. A voice coil motor according to claim 1, characterized in that, The vibration module also includes a first pad and a second pad. The first pad has a T-shaped structure. The columnar part of the first pad passes through a magnetic block, a magnet, and another magnetic block in sequence before connecting to the second pad. The buffer modules are respectively connected between the first gasket and the outer shell or winding frame, and between the second gasket and the outer shell or winding frame.

3. A voice coil motor according to claim 2, characterized in that, The buffer module includes a first elastic element and a second elastic element. The first elastic element is connected between the first gasket and the housing or winding frame, and the second elastic element is connected between the second gasket and the housing or winding frame.

4. A voice coil motor according to claim 3, characterized in that, The first elastic element and the second elastic element are one or more combinations of rubber blocks, silicone pads, sponges or springs.

5. A voice coil motor according to claim 1, characterized in that, The coil is covered with a shielding cover.

6. A voice coil motor according to claim 1, characterized in that, The inner wall of the guide cavity is coated with a wear-resistant coating, and the magnetic block of the vibration module slides in contact with the wear-resistant coating.

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