A voice coil motor

Abstract

The present invention relates to the field of motor technology, and more specifically, to a voice coil motor comprising a housing having a housing; a plurality of magnets attached to the inner walls of the housing to provide a constant magnetic field, the plurality of magnets forming a magnet array; a coil winding disposed within the housing and positioned within the magnet array, with a gap between the coil winding and the magnets; and a support structure for mounting the coil winding and a load. When the coil winding is energized, the coil winding is subjected to electromagnetic force on all sides within the magnet array. By changing the direction and magnitude of the current, the coil winding is caused to reciprocate up and down within the housing, thereby driving the support structure and the load mounted thereon to move together. This voice coil motor enables all four sides of the coil winding wound on the support structure to be located within a working air gap, thereby improving the electrical power utilization of the coil winding, thereby achieving greater operating efficiency and load-bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a voice coil motor. Background Art

[0002] The voice coil actuator (Voice Coil Actuator / Voice Coil Motor), named for its structure similar to the voice coil of a speaker, is widely used in the medical, semiconductor, aviation, automotive, and other fields due to its high-frequency response and high precision. A VCA is a DC motor that converts electrical energy into mechanical energy. It is primarily categorized as linear or oscillating. It utilizes the force exerted by a current-carrying conductor within the magnetic field generated by a permanent magnet to produce regular linear or finite-angle motion.

[0003] For the traditional structure of square or rectangular voice coil motors, whether it is a long moving coil or a short moving coil, only two sides of the coil are located in the working air gap, and the electric power is insufficiently utilized, resulting in low electromagnetic output.

[0004] In view of this, overcoming the above defects in the prior art and providing a new voice coil motor have become technical problems that need to be solved urgently in this field. Summary of the Invention

[0005] The present invention aims to address the above-mentioned deficiencies in the prior art and to provide a voice coil motor that enables all four sides of a coil winding wound on a support structure to be located within a working air gap, thereby improving the electrical power utilization of the coil winding and thereby achieving greater operating efficiency and load-bearing capacity. The voice coil motor of the present invention has low cost, high electromagnetic output, and is simple to manufacture and install. Compared with conventional voice coil motors, the output force can be more than doubled.

[0006] The purpose of the present invention can be achieved by the following technical measures:

[0007] One embodiment of the present invention provides a voice coil motor, comprising:

[0008] a housing having a receiving portion;

[0009] A plurality of magnets are attached to the inner walls of the shell to provide a constant magnetic field, wherein the magnets have an S pole on one side close to the inner wall of the shell and an N pole on the other side, and the plurality of magnets form a magnet array;

[0010] a coil winding disposed in the accommodating portion and located in the magnet array, with a gap between the coil winding and the magnet;

[0011] A support mechanism for mounting the coil winding, wherein one end of the support mechanism is located inside the shell and connected to the coil winding, and the other end of the support mechanism is located outside the shell and connected to the load; when the coil winding is energized, the coil winding is subjected to electromagnetic force on all sides in the magnet array, and by changing the direction and magnitude of the current, the coil winding is caused to reciprocate up and down in the accommodating portion, thereby driving the support mechanism and the load mounted on the support mechanism to move together.

[0012] According to one embodiment of the present invention, a through opening is opened on one side of the shell, and the support mechanism includes a first mounting portion located in the accommodating portion, a second mounting portion located outside the shell, and a connecting portion connecting the first mounting portion and the second mounting portion through the through opening, the coil winding is sleeved on the first mounting portion, and the load is mounted on the second mounting portion.

[0013] According to an embodiment of the present invention, the first mounting portion has a hollow structure, and the voice coil motor further includes a guide mechanism installed in the hollow structure.

[0014] According to one embodiment of the present invention, the guide mechanism is made of hard aluminum alloy or 3D material.

[0015] According to one embodiment of the present invention, the first mounting portion includes a first limiting block, a second limiting block and a fixed block connected between the first limiting block and the second limiting block, and the coil winding is sleeved on the fixed block and located between the first limiting block and the second limiting block.

[0016] According to one embodiment of the present invention, the second mounting portion is I-shaped, and the connecting portion includes a first connecting block connecting one end of the second mounting portion and the first limiting block, and a second connecting block connecting the other end of the second mounting portion and the second limiting block.

[0017] According to one embodiment of the present invention, the magnet includes three first magnets and two second magnets, the shell includes three first side plates and one second side plate, the first side plates and the second side plates together form the accommodating portion, the through opening is located on the second side plate, the second magnet is attached to the inner wall of the second side plate, two second magnets are respectively located on both sides of the through opening, the first magnet is attached to the inner wall of the first side plate, and one first magnet is arranged corresponding to one first side plate.

[0018] According to one embodiment of the present invention, the coil winding is square, the width of each first magnet is equal to the side length of the coil winding, and the width of each second magnet is half the side length of the coil winding.

[0019] According to an embodiment of the present invention, the housing is made of iron or steel.

[0020] According to one embodiment of the present invention, the supporting mechanism is made of hard aluminum alloy material.

[0021] The voice coil motor of the present invention enables all four sides of the coil winding wound on the support structure to be located in the working air gap, thereby improving the electric power utilization rate of the coil winding, thereby achieving greater operating efficiency and load-bearing capacity. The voice coil motor of the present invention has low cost, high electromagnetic output, and is simple to manufacture and install. Compared with traditional voice coil motors, the output force can be increased by more than twice. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the exploded structure of the voice coil motor according to an embodiment of the present invention.

[0023] Figure 2 3D is a schematic diagram of the three-dimensional structure of a voice coil motor according to an embodiment of the present invention.

[0024] Figure 3 2 is a front view of a voice coil motor according to an embodiment of the present invention.

[0025] Figure 4 yes Figure 3 Cross-sectional view along AA direction.

[0026] Figure 5 FIG. 1 is a schematic cross-sectional view of a left side view of a voice coil motor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Hereinafter, many aspects of the present invention will be better understood with reference to the accompanying drawings. The components in the drawings are not necessarily drawn to scale. Instead, emphasis is placed on clearly illustrating the components of the present invention. In addition, like reference numerals indicate corresponding parts throughout the several views of the drawings.

[0029] As used herein, the words "exemplary" or "illustrative" mean serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments, which are provided to enable those skilled in the art to make and use embodiments of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other embodiments, well-known features and methods are described in detail so as not to obscure the invention. For the purposes of the description herein, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," and their derivatives will be used interchangeably. Figure 1 Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, summary, or the following detailed description. It should also be understood that the specific devices and processes shown in the drawings and described in the following specification are simple exemplary embodiments of the inventive concepts defined in the appended claims. Therefore, specific dimensions and other physical characteristics related to the embodiments disclosed herein should not be construed as limiting unless the claims expressly state otherwise.

[0030] The voice coil motors of the present invention are used in automated laser processing equipment, primarily for securing the vertical motion mechanisms of optical lenses and laser heads. Alternatively, applications requiring high loads within a small horizontal motion space, such as piston guns, require sufficient output force to achieve optimal real-time motion performance (such as high acceleration and high response) despite high loads and short travel. The voice coil motors of the present invention can deliver more than twice the output force of traditional voice coil motors and meet higher load requirements.

[0031] Figure 1 Schematic diagram of the exploded structure of the voice coil motor according to the embodiment of the present invention. Figure 1 The voice coil motor includes: a housing 10, a plurality of magnets 20 arranged in the housing 10 for providing a constant magnetic field, a coil winding 30 that performs linear motion under the action of electromagnetic force in the constant magnetic field, and a support mechanism 40 for mounting the coil winding 30 and the load. The electromagnetic force is generated when the coil winding 30 is energized. Under the action of the electromagnetic force, the coil winding 30 drives the load to perform linear motion through the support mechanism 40.

[0032] See Figure 1 The housing 10 is made of iron or steel and is used to provide a closed magnetic circuit. Further, the housing 10 includes three first side plates 11 and a second side plate 12. The first side plates 11 and the second side plates 12 together form a receiving portion 13. The second side plate 12 is provided with a through opening 121.

[0033] See Figure 1 and Figure 2 , multiple magnets 20 are attached to the inner wall of the shell 10. The side of the magnet 20 close to the inner wall of the shell is S-pole, and the other side is N-pole. Multiple magnets 20 form a magnet array. Figures 1 to 4 Furthermore, the magnet 20 includes three first magnets 21 and two second magnets 22, wherein the second magnets 22 are attached to the inner wall of the second side plate 12, and the two second magnets 22 are respectively located on both sides of the through opening 121, and the first magnet 21 is attached to the inner wall of the first side plate 11, and one first magnet 21 is corresponding to one first side plate 11.

[0034] Further, see Figures 1 to 4 The coil winding 30 is disposed within the housing 13 and positioned within the magnet array, with a gap 50 between the coil winding 30 and the magnets 20. Furthermore, the coil winding 30 is square in shape, with the width of each first magnet 21 equal to the side length of the coil winding 30, and the width of each second magnet 22 half the side length of the coil winding 30. This arrangement provides a fixed magnetic path, ensuring that the entire coil winding 30 is fully within the magnetic field array, improving electromagnetic output and preventing only two sides of the coil winding 30 (e.g., a rectangular voice coil) from being within the magnetic flux. In this embodiment, when power is applied to the coil winding 30, all four sides of the coil winding 30 are excited by the constant magnetic field. Under the electromagnetic principle, the energized coil winding 30 generates electromagnetic thrust under the influence of the magnetic field. This arrangement of the coil winding 30 and magnets 20 can increase the electromagnetic thrust of the voice coil motor to more than twice that of a conventional rectangular voice coil.

[0035] See Figure 1 and Figure 2 The support mechanism 40 is made of a hard aluminum alloy. One end of the support mechanism 40 is located inside the housing 10 and connected to the coil winding 30, while the other end of the support mechanism 40 is located outside the housing 10 and connected to the load. Furthermore, the support mechanism 40 includes a first mounting portion 41 located within the housing 13, a second mounting portion 42 located outside the housing 10, and a connecting portion 43 connecting the first mounting portion 41 and the second mounting portion 42 via a through-hole 121. The coil winding 30 is sleeved on the first mounting portion 41, and the load is mounted on the second mounting portion 42. Under the action of electromagnetic force, the coil winding 30 performs linear motion in the housing 13 and drives the support mechanism 40 to follow the linear motion in the through-hole 121, thereby driving the load to move together.

[0036] See Figure 1The first mounting portion 41 includes a first limiting block 411, a second limiting block 412, and a fixing block 413 connected between the first limiting block 411 and the second limiting block 412. The coil winding 30 is sleeved on the fixing block 413 and located between the first limiting block 411 and the second limiting block 412. The second mounting portion 42 is I-shaped, and the connecting portion 43 includes a first connecting block 431 connecting one end of the second mounting portion 42 to the first limiting block 411, and a second connecting block 432 connecting the other end of the second mounting portion 42 to the second limiting block 412.

[0037] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 The first mounting portion 41 has a hollow structure 414. The voice coil motor further includes a guide mechanism 60 installed in the hollow structure 414. Specifically, the guide mechanism 60 is made of hard aluminum alloy or 3D material. The guide mechanism 60 is a guide rod. The guide mechanism 60 provides a guiding function during the installation and movement of the support mechanism 40, so that the installation of the support mechanism 40 and the movement of the load are more stable.

[0038] In this embodiment, when reverse direct current is applied to the coil winding 30, a downward electromagnetic force is applied to all sides of the coil winding 30, causing the coil winding 30 to move linearly downward within the housing 13, thereby driving the support mechanism 40 and the load mounted thereon to move. When forward direct current is applied to the coil winding 30, a upward electromagnetic force is applied to all sides of the coil winding 30, causing the coil winding 30 to move linearly upward within the housing 13, thereby driving the support mechanism 40 and the load mounted thereon to move. The voice coil motor of this embodiment of the present invention changes the direction and magnitude of the current to cause the coil winding 30 to reciprocate up and down within the housing, thereby driving the support mechanism 40 and the load mounted thereon to move.

[0039] The voice coil motor of the embodiment of the present invention can be applied to the semiconductor high-precision equipment industry and the life science field (such as genetic testing, cancer screening, etc.). It can achieve one-click replacement without adding additional costs or the need to carry higher loads. Compared with cylindrical or arc-shaped voice coil motors, the installation process and processing are simple. The overall energy efficiency of the motor body can be improved by changing the shape of the coil winding 30, the magnet 20 and the structure of the shell 10.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A voice coil motor, characterized in that: The voice coil motor includes: a housing having a receiving portion; A plurality of magnets are attached to the inner walls of the shell to provide a constant magnetic field, wherein the magnets have an S pole on one side close to the inner wall of the shell and an N pole on the other side, and the plurality of magnets form a magnet array; a coil winding disposed in the accommodating portion and located in the magnet array, with a gap between the coil winding and the magnet; A support mechanism for mounting the coil winding, wherein one end of the support mechanism is located inside the shell and connected to the coil winding, and the other end of the support mechanism is located outside the shell and connected to the load; when the coil winding is energized, the coil winding is subjected to electromagnetic force on all sides in the magnet array, and by changing the direction and magnitude of the current, the coil winding is caused to reciprocate up and down in the accommodating portion, thereby driving the support mechanism and the load mounted on the support mechanism to move together.

2. The voice coil motor according to claim 1, wherein: A through opening is opened on one side of the shell, and the support mechanism includes a first mounting portion located in the accommodating portion, a second mounting portion located outside the shell, and a connecting portion connecting the first mounting portion and the second mounting portion through the through opening. The coil winding is sleeved on the first mounting portion, and the load is mounted on the second mounting portion.

3. The voice coil motor according to claim 2, wherein: The first mounting portion has a hollow structure, and the voice coil motor further includes a guide mechanism mounted in the hollow structure.

4. The voice coil motor according to claim 3, wherein: The guide mechanism is made of hard aluminum alloy or 3D material.

5. The voice coil motor according to claim 2, wherein: The first mounting portion includes a first limiting block, a second limiting block and a fixed block connected between the first limiting block and the second limiting block. The coil winding is sleeved on the fixed block and located between the first limiting block and the second limiting block.

6. The voice coil motor according to claim 5, characterized in that: The second mounting portion is in an I-shape, and the connecting portion includes a first connecting block connecting one end of the second mounting portion and the first limiting block, and a second connecting block connecting the other end of the second mounting portion and the second limiting block.

7. The voice coil motor according to claim 2, wherein: The magnets include three first magnets and two second magnets, the shell includes three first side plates and one second side plate, the first side plates and the second side plates together form the accommodating portion, the through opening is located on the second side plate, the second magnets are attached to the inner wall of the second side plate, two second magnets are respectively located on both sides of the through opening, the first magnet is attached to the inner wall of the first side plate, and one first magnet is corresponding to one first side plate.

8. The voice coil motor according to claim 7, wherein: The coil winding is square, the width of each first magnet is equal to the side length of the coil winding, and the width of each second magnet is half of the side length of the coil winding.

9. The voice coil motor according to claim 1, wherein: The shell is made of iron or steel.

10. The voice coil motor according to claim 1, wherein: The supporting mechanism is made of hard aluminum alloy material.

Images