Novel voice coil motor

Abstract

The application discloses a novel voice coil motor, which comprises a cylindrical shell, a lens sleeve is threadedly connected to one end of the shell, a position sensor support is fixedly connected to the other end of the shell, a through hole is formed in the middle of the position sensor support, a connecting column is arranged in the through hole, a coil is wound around one end of the connecting column, the coil is connected with the position sensor support, a magnet is fixedly connected to the side of the position sensor support away from the shell, a groove is formed in the side of the magnet close to the position sensor support in the circumferential direction, and one end of the connecting column winding the coil extends into the groove; the application can keep stable in the case of stopping and will not cause shaking due to the fact that the photosensitive sheet receives light waves emitted by the non-light emitting tube.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser equipment, in particular to a new voice coil motor. BACKGROUND

[0002] The voice coil motor is a direct drive motor with high acceleration, high speed, fast response, smooth force characteristics and other excellent performances. The voice coil motor is widely used in optical scanning, positioning, aiming, tracking and stabilization in the fields of optics, microelectronics and measurement, and is used for precise motion control of lenses or mirrors. For example, automatic focusing of video cameras, digital cameras and microscopes, dynamic focusing of Z-axis of laser cutting equipment, focusing and tracking of optical disc drives, and deflection control of fast mirrors in astronomical telescopes. The voice coil motor has simple structure, high precision, high response, maintenance-free, no slot effect, and does not need to be reversed, and is particularly suitable for short stroke, fast response and high precision closed-loop servo control. The voice coil motor is also often used in laser marking. The marking machine needs to mark a label with a three-dimensional effect on the material. We must control the mirror through the motion feedback system to guide the laser to the corresponding position within a few seconds. The voice coil motor is an ideal linear actuator and has excellent effect in short distance position control.

[0003] When the voice coil motor is applied to the laser marking and 3D printing industries related to laser, the photosensitive sheet of the voice coil motor cannot distinguish the type and source of the light wave when receiving the light wave. The wavelength range of the light emitted by the light-emitting tube is λ2-λ3nm, and the working light wavelength λ1nm is included in the wavelength range of the light emitted by the light-emitting tube. The photosensitive sheet can receive light waves in the range of λ2-λ3nm. Because when the working light passes through the motor, the working light will disperse in the entire structure and be received by the photosensitive sheet, the entire photosensitive sheet will be affected, resulting in abnormal operation and causing the motor to be paralyzed and unable to work. SUMMARY

[0004] The purpose of the present application is to provide a new voice coil motor to solve the problems in the background art.

[0005] The technical scheme adopted by the present application is a new voice coil motor, which comprises a cylindrical shell, a lens sleeve is threadedly connected to one end of the shell, a position sensor support is fixedly connected to the other end of the shell, a through hole is formed in the middle of the position sensor support, a connecting column is arranged in the through hole, a coil is wound around one end of the connecting column, a magnet is fixedly connected to the side of the position sensor support away from the shell, a groove is formed in the side of the magnet close to the position sensor support along the circumference thereof, and one end of the connecting column winding the coil extends into the groove.

[0006] The present application also has the following characteristics:

[0007] The light-emitting tube, the filter sheet and the photosensitive sheet are sequentially connected in the circumferential direction of the position sensor support, and are located on the same axis.

[0008] The column body of the connecting column is connected with a light-blocking sheet, and the light-blocking sheet is matched with the first clamping groove.

[0009] The magnet is provided with a second clamping groove, which is communicated with the groove, and the second clamping groove is matched with the light-blocking sheet, and the second clamping groove is oppositely arranged with the first clamping groove.

[0010] The position sensor support is provided with two first threaded holes, which are arranged on the two sides of the through hole respectively, and the two first threaded holes are connected with the shell through screws.

[0011] The magnet is provided with two second threaded holes, which are arranged on the two sides of the groove respectively, and the second threaded holes are oppositely arranged with the first threaded holes, and the screws pass through the first threaded holes and the second threaded holes to connect the magnet, the position sensor support and the shell.

[0012] The beneficial effects of the present application are:

[0013] The novel voice coil motor of the present application is provided with a filter sheet in front of the photosensitive sheet to filter out λ1nm light waves, so that the motor operation is no longer affected by the λ1nm light waves escaping in the motor, thereby the voice coil motor can normally operate, the position feedback is more accurate, the stability and reliability of the voice coil motor are further improved, the voice coil motor can better complete the required action, and different filter sheets can be replaced according to different working wavelengths to realize the application of multiple products. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is an exploded view of the novel voice coil motor of the present application;

[0015] Figure 2 is a structure sectional view of the novel voice coil motor of the present application;

[0016] Figure 3 is a partial structure schematic view of the position sensor support in the novel voice coil motor of the present application;

[0017] Figure 4 is a partial structure schematic view of the connecting column in the novel voice coil motor of the present application;

[0018] Figure 5 is a partial structure schematic view of the magnet in the novel voice coil motor of the present application.

[0019] In the diagram: 1. Outer shell, 2. Coil, 3. Magnet, 4. Lens sleeve, 5. Position sensor bracket, 6. Light-emitting diode, 7. Light-blocking plate, 8. Filter, 9. Photosensitive film, 10. Through hole, 11. Connecting post, 12. Groove, 13. First slot, 14. Second slot, 15. First threaded hole, 16. Second threaded hole. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] This invention provides a novel voice coil motor, such as Figures 1-3 As shown, the device includes a cylindrical outer shell 1. One end of the outer shell 1 is threadedly connected to a lens sleeve 4, and the other end of the outer shell 1 is fixedly connected to a position sensor bracket 5. A through hole 10 is opened in the middle of the position sensor bracket 5, and a connecting post 11 is arranged in the through hole 10. A coil 2 is wound around one end of the connecting post 11. A magnet 3 is fixedly connected to the side of the position sensor bracket 5 away from the outer shell 1. A groove 12 is opened along the circumference of the side of the magnet 3 near the position sensor bracket 5. The end of the connecting post 11 with the coil 2 wound around it extends into the groove 12. The cross-sections of the position sensor bracket 5 and the magnet 3 are both circular, and their structures match those of the outer shell 1.

[0022] A light-emitting diode 6, a filter 8, and a photosensitive film 9 are sequentially connected along the circumference of the position sensor bracket 5. A first slot 13 is provided on the position sensor bracket 5, which is located between the filter 8 and the light-emitting diode 6.

[0023] like Figure 4 As shown, the column body of the connecting column 11 is connected to a light-blocking plate 7, which matches the first slot 13.

[0024] like Figure 5 As shown, a second slot 14 is provided on the magnet 3. The second slot 14 is connected to the groove 12. The second slot 14 matches the light-blocking plate 7. The second slot 14 is arranged opposite to the first slot 13.

[0025] The position sensor bracket 5 has two first threaded holes 15, which are respectively located on both sides of the through hole 10. The two first threaded holes 15 are connected to the housing 1 by screws.

[0026] The magnet 3 has two second threads 16, and two second threaded holes 16 are respectively set on both sides of the groove 12. The second threaded holes 16 are opposite to the first threaded hole 15. The screw passes through the first threaded hole 15 and the second threaded hole 16 to connect the magnet 3, the position sensor bracket 5 and the housing 1.

[0027] The working principle of the novel voice coil motor of this invention is as follows:

[0028] The motor is connected to an external power source, the coil 2 is electrified and moves in the magnetic field formed by the recess 12 of the magnet 3, drives the connecting column 11 to move, and further drives the light barrier 7 to move in the first clamping groove 13. The light emitted by the light-emitting tube 6 passes through the light barrier 7 and is then filtered by the filter 8 and reflected on the photosensitive sheet 9. The position of the light barrier 7 is different, and the position of the light received by the photosensitive sheet 9 is also different.

[0029] Because the working light wave is a light wave of λ1nm wavelength, and the light emitted by the light-emitting tube 6 is a light wave of λ2-λ3nm range, which contains the working light wave λ1nm wavelength, and the light wave received by the photosensitive sheet 9 contains λ2-λ3nm range, which makes it only need to make the photosensitive sheet 9 no longer receive the light wave of λ1nm wavelength to solve this problem. The product is covered with a filter 8 on the surface of the photosensitive sheet 9, which filters out all the light waves of λ1nm wavelength, and even if the light emitted by the light-emitting tube 6 is filtered out of the light wave of λ1nm wavelength, the photosensitive sheet 9 can still work normally.

[0030] The novel voice coil motor of the application is provided with a filter in front of the photosensitive sheet of the position sensor support to filter out the working light λ1nm, so that the photosensitive sheet can work normally, so that the motor no longer causes the photosensitive sheet to work as a whole due to the working light escaping in the structure, thereby causing the motor to be unable to work. The influence of the working light on the photosensitive sheet is successfully solved, and the filter can also be replaced according to the different working light to be applied to other different models or types of products.

Claims

1. A new voice coil motor characterized in that, The utility model provides a position sensor, including the cylindrical shell (1), one end of the shell (1) is screwed with the lens sleeve (4), the other end of the shell (1) is fixed with position sensor support (5), the middle part of position sensor support (5) is provided with through -hole (10), be provided with connecting column (11) in through -hole (10), one end of connecting column (11) is wound with coil (2), the side of position sensor support (5) away from the shell (1) is fixed with magnet (3), the side of magnet (3) close to position sensor support (5) is provided with recess (12) along its circumference, one end of connecting column (11) winding coil (2) is inserted into recess (12); The position sensor support (5) is sequentially connected with a light-emitting tube (6), a filter (8) and a photosensitive sheet (9) along its circumference, the light-emitting tube (6), the filter (8) and the photosensitive sheet (9) are located on the same axis, a first clamping groove (13) is formed in the position sensor support (5), the first clamping groove (13) is arranged between the filter (8) and the light-emitting tube (6), and the filter (8) covers the surface of the photosensitive sheet (9); The column body of the connecting column (11) is connected with a light-blocking sheet (7), and the light-blocking sheet (7) is matched with the first clamping groove (13); A second clamping groove (14) is formed in the magnet (3), the second clamping groove (14) is communicated with the recess (12), the second clamping groove (14) is matched with the light-blocking sheet (7), and the second clamping groove (14) is oppositely arranged with the first clamping groove (13).

2. The novel voice coil motor as claimed in claim 1, wherein, The position sensor support (5) is provided with two first threaded holes (15), and the two first threaded holes (15) are arranged on the two sides of the through hole (10), respectively. The two first threaded holes (15) are connected with the shell (1) through screws.

3. The novel voice coil motor as claimed in claim 1, wherein, The magnet (3) is provided with two second threaded holes (16), and the two second threaded holes (16) are arranged on the two sides of the recess (12), respectively. The second threaded holes (16) are oppositely arranged with the first threaded holes (15), and the screws pass through the first threaded holes (15) and the second threaded holes (16) to connect the magnet (3), the position sensor support (5) and the shell (1).

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