Electromagnetic drive type angle deflection improved structure and deflection mirror device thereof

Abstract

The utility model discloses an electromagnetic drive type angle deflection improvement structure and a deflection mirror device thereof, the angle deflection improvement structure comprises a rotor assembly and a stator assembly, the rotor assembly is composed of a rotating shaft and at least two adjacent permanent magnets arranged in a staggered pole mode, and the stator assembly comprises a stator ring, two first tooth poles and two second tooth poles. The first tooth poles and the second tooth poles are evenly arranged in the stator ring at intervals in a pairwise opposite mode, the two ends of the oppositely-arranged first tooth poles in the length direction are provided with insulating wire frames, and coil windings are wound around the insulating wire frames and suspended on the outer sides of the permanent magnets. On the basis of four poles, the first tooth poles and the second tooth poles are arranged outside the permanent magnets, so that magnetic field lines can be better gathered and guided, the influence of the tooth poles on the torque output smoothness of the rotating shaft can be reduced as much as possible, air gaps around the permanent magnets are reduced to about 0.3 mm, and the torque output smoothness of the rotating shaft is improved. Therefore, the same performance as that of the existing structure can be achieved by using a weaker magnet and fewer coils.

Description

Technical Field

[0001] The utility model relates to the field of deflection structures, in particular to an electromagnetically driven improved angle deflection structure and a deflection mirror device thereof. Background Art

[0002] The angle deflection structure is a structural design that uses an electromagnetic field to drive the rotating shaft to deflect within a certain angle. It has a wide range of applications, including large-scale laser processing equipment, high-speed laser engraving machines, etc.

[0003] In the existing field, a rotating shaft is typically made of magnets. A coil is then placed around the shaft using a colloid to keep the coil contained outside the shaft. When power is applied, the magnetic field drives the shaft to rotate. The absence of cogging results in smoother torque output, enabling more precise angular positioning and speed control. In galvanometer systems, this is crucial for accurately reflecting a laser beam or beam to a specific location.

[0004] However, precisely because there are no teeth, the air gap between the enclosure and the magnet in the above solution is too large (usually greater than 1.15mm), resulting in a very weak magnetic field. Therefore, more coils and stronger magnets are required. As a result, the weight and volume of the product cannot be made very small. At the same time, from the perspective of the magnetic field circuit, the existing structure has only two magnetic field circuits, commonly known as a "two-stage" structure. Due to the small number of magnetic poles, the magnetic field changes drastically and the speed is high. However, this high speed may bring certain challenges in some application scenarios with high requirements for speed stability, such as speed fluctuations. In addition, in the closed-loop feedback control process in the galvanometer field, the two-pole structure cannot accurately respond to changes in the position signal and cannot achieve higher angle control accuracy. Utility Model Content

[0005] In order to solve the above problems, the present invention provides an electromagnetically driven angular deflection improved structure, including a rotor assembly and a stator assembly, wherein the rotor assembly is composed of a rotating shaft and at least two adjacent staggered permanent magnets, the permanent magnets being sleeved on the rotating shaft, the stator assembly including a stator ring and two slotless first and second tooth poles extending along the end face ring center of the stator ring, the first and second tooth poles being evenly spaced within the stator ring and arranged opposite each other in pairs, the rotor assembly being arranged between the first and second tooth poles, and insulating wire frames being provided at both ends of the oppositely arranged first tooth poles in the length direction, the insulating wire frame partially wrapping the first tooth pole, and a coil winding being wound on the insulating wire frame and suspended outside the permanent magnet.

[0006] Furthermore, the insulating wire frame includes a first contact surface and a second contact surface that enclose a semi-open space, the first contact surface abuts against the end surfaces of both ends of the first tooth pole, and the second contact surface at least partially wraps the two sides of the first tooth pole. The coil winding is wound around the first contact surface and the second contact surface, and a first limiting portion is provided at one end of the first contact surface and the second contact surface adjacent to the permanent magnet.

[0007] Furthermore, a third contact surface is extended outward from the second contact surface, the third contact surface is in contact with the inner wall of the stator ring, an angle is formed between the third contact surface and the second contact surface, and the distance between the angles is smaller than the distance between the second contact surfaces.

[0008] Furthermore, a second limiting portion is provided on the end surfaces of the second contact surface and the third contact surface.

[0009] Furthermore, positioning grooves are relatively provided on the stator ring, and protrusions matching the positioning grooves are provided on the second tooth pole. The protrusions and positioning grooves are used for detachable connection between the stator ring and the second tooth pole.

[0010] Furthermore, the stator ring is formed by stacking and stamping sheets, and the material of the permanent magnet is neodymium iron boron.

[0011] At the same time, the present application also provides a deflecting mirror device, including a shell wrapped around the stator ring, the shell and the stator ring are fixed by laser welding, a front cover and a rear cover are provided at both ends of the shell, a support shaft is fixed to one end of the rotating shaft, a clamping portion is provided at the end of the support shaft away from the rotating shaft, the support shaft passes through the front cover so that its clamping portion extends out of the front cover, and a control component is provided on the side of the rear cover away from the stator assembly.

[0012] Furthermore, a first channel is provided in the front cover, the support shaft passes through the first channel, and a first bearing is provided between the first channel and the support shaft. The outer ring and the inner ring of the first bearing are loosely fitted with the inner wall of the first channel and the outer wall of the support shaft respectively, and limiting steps are provided on the support shaft and the first channel to prevent the first bearing from moving on the axis.

[0013] Furthermore, a second channel is provided in the rear cover, the rotating shaft passes through the second channel, a second bearing is provided between the second channel and the rotating shaft, the outer ring and the inner ring of the second bearing are loosely fitted with the inner wall of the second channel and the outer wall of the rotating shaft respectively, and a positioning ring and an elastic gasket are provided at both axial ends of the second bearing respectively, the elastic gasket is pre-pressed on one side of the second bearing, and the positioning ring and the elastic gasket are used to prevent the second bearing from moving on the axis.

[0014] Furthermore, the control component includes a solid control circuit board, which is electrically connected to the coil winding. A first gasket is covered on the side of the control circuit board away from the back cover, and a plurality of light-guiding grids are arranged on the first gasket. A light-blocking plate for shielding the light-guiding grids is arranged on the outside of the first gasket. The rotating shaft passes through the first gasket, and the light-blocking plate is fixed on the rotating shaft and rotates synchronously with the rotating shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This application increases the number of magnetic poles from two to four, resulting in a more gradual change in the magnetic field and a more stable rotational speed, enabling a relatively uniform speed output during operation. This is crucial for galvanometer systems that require precise control of the optical path deflection angle and position. For example, in the field of laser precision machining, a stable rotational speed ensures that the laser beam accurately strikes the target position, improving machining accuracy.

[0017] 2. Furthermore, the relatively low and stable rotational speed of this application enables more precise response to changes in position signals during closed-loop feedback control, thereby achieving higher angular control accuracy. In applications requiring high-precision optical path control, such as laser medical treatment and semiconductor lithography, this can better meet the requirements for precise control of the deflection angle of optical components, improving the processing accuracy and performance of the equipment.

[0018] 3. At the same time, on the basis of the four poles, a slotless first tooth pole and a second tooth pole are provided on the outside of the permanent magnet, and the coil winding is suspended on the outside of the permanent magnet through an insulating wire frame, so as to achieve better gathering and guidance of the magnetic field lines. At the same time, the slotless tooth pole can minimize the impact of the tooth pole torque on the torque output smoothness of the rotating shaft. At the same time, the air gap around the permanent magnet is reduced from more than 1.15 mm in the existing technology to about 0.3 mm, so that the same performance as the existing galvanometer motor can be achieved with a weaker magnet and fewer coils, making the entire product miniaturized and lightweight while maintaining or even improving performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a schematic diagram of the related structure of the prior art of the utility model;

[0021] Figure 2This is a schematic diagram of the overall structure of the electromagnetic driven angle deflection improved structure of the utility model;

[0022] Figure 3 This is an exploded view of the overall structure of the electromagnetically driven angle deflection improved structure of the utility model;

[0023] Figure 4 Schematic diagram of the magnetic circuit of the present utility model;

[0024] Figure 5 This is a schematic structural diagram of the insulating wire rack of the present utility model;

[0025] Figure 6 This is a schematic structural diagram of the stator assembly of the present utility model;

[0026] Figure 7 This is a schematic structural diagram of the deflecting mirror device of the present invention;

[0027] Figure 8 This is a cross-sectional view of the structure of the deflecting mirror device of the present invention;

[0028] Figure 9 This is an exploded view of the control assembly of the present invention;

[0029] Figure 10 This is a schematic diagram of the assembly of the rotating shaft and the permanent magnet of the utility model.

[0030] The reference numerals and names in the figures are as follows:

[0031] The encapsulation body 10, the coil 20, the colloid 30, the rotor assembly 100, the stator assembly 200, the rotating shaft 110, the permanent magnet 120, the stator ring 210, the first tooth pole 220, the second tooth pole 230, the insulating wire frame 300, the coil winding 400, the connecting wire 410, the first contact surface 310, the second contact surface 320, the first limiting portion 311, the third contact surface 330, the angle 321, the second limiting portion 331, the positioning groove 221, the protrusion 231, the shell 500, the front cover 510, the rear cover 520, the support shaft 111, the clamping portion 112, the first channel 511, the first bearing 530, the limiting step 512, the second channel 521, the second bearing 540, the positioning ring 522, the elastic gasket 523, the control assembly 600, the control circuit board 610, the first gasket 620, the light guide grid 621, and the light blocking sheet 630. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The present invention will be described in more detail. It should be understood that the specific embodiments described herein are intended only to explain the present invention and are not intended to limit the present invention. It should be noted that when an element is described as being "fixed to" another element, it may be directly on the other element, or one or more intervening elements may be present therebetween. When an element is described as being "connected to" another element, it may be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0034] In the description of the present invention, it should be noted that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] The preferred embodiments of the present invention will now be further described with reference to the accompanying drawings. Figure 1As shown, the existing angle deflection structure usually adopts a rotating shaft 110 made of magnets, and then an enclosure 10 and a coil 20 are set on the outside of the rotating shaft 110. The colloid 30 is used to control the coil 20 on the outside of the rotating shaft 110. After power is applied, the magnetic field drives the rotating shaft 110 to rotate. From the above-mentioned magnetic field circuit, the existing structure has only two magnetic field circuits, which is commonly known as a "two-stage" toothless structure.

[0038] At least one embodiment of the present application provides an improved electromagnetically driven angle deflection structure, such as Figures 2 to 3 As shown, it includes a rotor assembly 100 and a stator assembly 200, as shown in FIG. Figure 10 As shown, the rotor assembly 100 comprises a rotating shaft 110 and at least two adjacent staggered permanent magnets 120. The permanent magnets 120 are sleeved on the rotating shaft 110. The stator assembly 200 comprises a stator ring 210 and two slotless first and second tooth poles 220, 230 extending along the end face of the stator ring 210. The first and second tooth poles 220, 230 are evenly spaced within the stator ring 210 and are arranged opposite each other. The rotor assembly 100 is disposed between the first and second tooth poles 220, 230. Insulating bobbins 300 are disposed at both ends of the opposed first tooth poles 220 in the longitudinal direction. The insulating bobbins 300 partially wrap the first tooth poles 220. A coil winding 400 is wound around the insulating bobbin 300 and suspended outside the permanent magnets 120. A connecting wire 410 is provided on the coil winding 400 for electrical connection to the outside.

[0039] In the above embodiment, since the rotor assembly 100 is composed of a rotating shaft 110 and at least two permanent magnets 120 with staggered poles, the permanent magnets 120 are sleeved on the rotating shaft 110, and a coil winding 400 is suspended on the outside of the permanent magnet 120, when the coil winding 400 is energized, the permanent magnets 120 covering the rotating shaft 110 will generate opposite polarities at adjacent ends, and the rotating shaft 110 will be driven to rotate between the first tooth pole 220 and the second tooth pole 230 under the effect of the magnetic field.

[0040] From the above embodiments, it can be seen that the present application utilizes at least two adjacent staggered-pole permanent magnets 120, and then uses the coil winding 400 suspended outside the permanent magnet 120 to energize so that the polarities of the adjacent ends of the permanent magnet 120 are opposite, thereby forming four magnetic field loops. Compared with the prior art, Figure 4As shown, the number of magnetic poles in the present application is changed from 2 to 4, the magnetic field changes relatively smoothly, the rotation speed is relatively more stable, and a relatively uniform speed output can be maintained during operation. At the same time, on the basis of 4 poles, a slotless first tooth pole 220 and a second tooth pole 230 are provided on the outside of the permanent magnet 120, and the coil winding is suspended on the outside of the permanent magnet 120 through the insulating wire frame 300, so as to achieve better gathering and guiding of the magnetic field lines. At the same time, the slotless tooth pole can minimize the influence of the tooth pole torque on the torque output smoothness of the rotating shaft 110, and at the same time, the air gap around the permanent magnet 120 is reduced from more than 1.15 mm in the prior art to about 0.3 mm, so that the same performance as the existing galvanometer motor can be achieved with a weaker magnet and fewer coils, so that the entire product can be miniaturized and lightweight on the basis of unchanged or even improved performance.

[0041] On the basis of the above embodiment, Figure 5 As shown, the insulating wire frame 300 includes a first contact surface 310 and a second contact surface 320 that enclose a semi-open space, the first contact surface 310 abuts against the end surfaces of both ends of the first tooth pole 220, and the second contact surface 320 at least partially wraps the two sides of the first tooth pole 220, the coil winding 400 is wound on the first contact surface 310 and the second contact surface 320, and a first limiting portion 311 is provided at one end of the first contact surface 310 and the second contact surface 320 adjacent to the permanent magnet 120. When the coil winding 400 is wound around the first contact surface 310 and the second contact surface 320, the first limiting portion 311 can prevent the coil winding 400 from moving toward the permanent magnet 120, thereby causing the coil winding 400 to be suspended on the outside of the permanent magnet 120.

[0042] On the basis of the above embodiment, Figure 2 and Figure 5 As shown, a third contact surface 330 is extended outward from the second contact surface 320, and the third contact surface 330 is in contact with the inner wall of the stator ring 210. In this way, an angle 321 is formed between the third contact surface 330 and the second contact surface 320. The distance between the angles 321 is smaller than the distance between the second contact surfaces 320. In this way, when the insulating wire frame 300 and the first tooth pole 220 are assembled, an interference fit is formed between the second contact surface 320 and the first tooth pole 220, thereby making the installation between the insulating wire frame 300 and the first tooth pole 220 more secure than simply reducing the width of the second contact surface 320.

[0043] In some embodiments, combined Figure 2 and Figure 5As shown, a second limiting portion 331 is provided on the end surfaces of the second contact surface 320 and the third contact surface 330. When the insulating wire holder 300 is assembled into the first tooth pole 220, the second limiting portion 331 limits the installation of the insulating wire holder 300 along the length of the first tooth pole 220 to prevent the insulating wire holder 300 from being too close to the interior of the stator ring 210 and thus being inconvenient to remove.

[0044] On the basis of the above embodiment, Figure 6 As shown, positioning grooves 221 are relatively provided on the stator ring 210, and protrusions 231 that cooperate with the positioning grooves 221 are provided on the second tooth pole 230. The second tooth pole 230 is detachably connected to the stator ring 210 by the engagement of the protrusions 231 and the positioning grooves 221. This makes it easier to install the insulating bobbin 300 and perform winding operations on the insulating bobbin 300. Specifically, when assembling the present application, the second tooth pole 230 is first removed from the stator ring 210 to leave sufficient operating space in the stator ring 210. Then, the insulating bobbin 300 is installed on the first tooth pole 220 and the coil winding 400 is wound on the insulating bobbin 300. After completing the above work, the second tooth pole 230 is installed on the stator ring 210.

[0045] Further to the above embodiment, the stator ring 210 is formed by stacking and stamping sheets, so that the magnetic circuit can be controlled more accurately and the magnetic field distribution can be more uniform. This helps to improve the electromagnetic conversion efficiency and reduce the impact of magnetic field distortion on performance. In some embodiments, the material of the permanent magnet 120 is neodymium iron boron. Neodymium iron boron magnets have extremely high magnetic energy product and can generate a stronger magnetic field at the same volume. This means that in the use environment of this application, the use of neodymium iron boron magnets can enable the motor to obtain a larger magnetic force in a smaller space, thereby improving the power density and efficiency of the motor, which helps to miniaturize and improve the performance of this application.

[0046] The present application also discloses a deflection mirror device for the above electromagnetic driven angle deflection improved structure, such as Figure 7As shown, it includes a shell 500 wrapped around the stator ring 210, and the shell 500 is fixed to the stator ring 210 by laser welding. A front cover 510 and a rear cover 520 are provided at both ends of the shell 500. A support shaft 111 is fixed to one end of the rotating shaft 110, and a clamping portion 112 is provided at the end of the support shaft 111 away from the rotating shaft 110. The clamping portion 112 can clamp different functional components according to different application scenarios of the present structure. For example, in the application of the galvanometer system, the clamping portion 112 can be used to clamp an optical lens. The support shaft 111 passes through the front cover 510 so that its clamping portion 112 extends out of the front cover 510, and a control component 600 is provided on the side of the rear cover 520 away from the stator assembly 200.

[0047] On the basis of the above embodiment, Figure 7 and Figure 8 As shown, a first channel 511 is provided in the front cover 510, the support shaft 111 passes through the first channel 511, and a first bearing 530 is provided between the first channel 511 and the support shaft 111. The outer ring and the inner ring of the first bearing 530 are loosely fitted with the inner wall of the first channel 511 and the outer wall of the support shaft 111, respectively, so that when the rotating shaft 110 rotates, its radial movement depends on the radial runout accuracy of the first bearing 530, eliminating the influence of other factors (such as processing accuracy), thereby making the radial movement of the rotating shaft 110 more controllable. Preferably, in some implementations, a limiting step 512 is provided on the support shaft 111 and the first channel 511 to prevent the first bearing 530 from axial movement.

[0048] On the basis of the above embodiment, Figure 7 and Figure 8 As shown, a second channel 521 is provided in the rear cover 520, and the rotating shaft 110 passes through the second channel 521. A second bearing 540 is provided between the second channel 521 and the rotating shaft 110. The outer ring and the inner ring of the second bearing 540 are loosely fitted with the inner wall of the second channel 521 and the outer wall of the rotating shaft 110 respectively, so that when the rotating shaft 110 rotates, its radial movement depends on the radial runout accuracy of the first bearing 530, eliminating the influence of other factors (such as processing accuracy), thereby making the radial movement of the rotating shaft 110 more controllable. In some embodiments, a positioning ring 522 and an elastic gasket 523 are respectively provided at both axial ends of the second bearing 540. The elastic gasket 523 is pre-pressed on one side of the second bearing 540. The positioning ring 522 and the elastic gasket 523 are used to prevent the second bearing 540 from moving on the axis.

[0049] On the basis of the above embodiment, Figure 9As shown, the control component 600 includes a control circuit board 610, which is electrically connected to the coil winding 400. A first gasket 620 is covered on the side of the control circuit board 610 away from the back cover 520. A plurality of light-guiding grids 621 are arranged on the first gasket 620. A light-blocking plate 630 for shielding the light-guiding grids 621 is arranged on the outer side of the first gasket 620. The rotating shaft 110 passes through the first gasket 620. The light-blocking plate 630 is fixed on the rotating shaft 110 and rotates synchronously with the rotating shaft 110.

[0050] The above exemplary embodiments are detailed, and the present invention may be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included within the present invention.

Claims

1. An improved electromagnetically driven angle deflection structure, comprising a rotor assembly (100) and a stator assembly (200), characterized in that: The rotor assembly (100) is composed of a rotating shaft (110) and at least two adjacent staggered permanent magnets (120), wherein the permanent magnets (120) are sleeved on the rotating shaft (110). The stator assembly (200) comprises a stator ring (210) and two slotless first tooth poles (220) and second tooth poles (230) extending along the end face ring center of the stator ring (210). The first tooth poles (220) and the second tooth poles (230) are evenly spaced and arranged opposite to each other in pairs within the stator ring (210). The subassembly (100) is arranged between the first tooth pole (220) and the second tooth pole (230); insulating wire racks (300) are arranged at both ends of the first tooth pole (220) in the length direction; the insulating wire rack (300) partially wraps the first tooth pole (220); a coil winding (400) is wound on the insulating wire rack (300) and the coil winding (400) is suspended outside the permanent magnet (120); and a connecting wire (410) is arranged on the coil winding (400).

2. The electromagnetically driven angle deflection improved structure according to claim 1, characterized in that: The insulating wire frame (300) comprises a first contact surface (310) and a second contact surface (320) enclosing a semi-open space, wherein the first contact surface (310) abuts against the end surfaces at both ends of the first tooth pole (220), and the second contact surface (320) at least partially wraps the two sides of the first tooth pole (220). The coil winding (400) is wound on the first contact surface (310) and the second contact surface (320), and a first limiting portion (311) is provided at one end of the first contact surface (310) and the second contact surface (320) adjacent to the permanent magnet (120).

3. The electromagnetic driven angle deflection improved structure according to claim 2, characterized in that: A third contact surface (330) is extended outward from the second contact surface (320), and the third contact surface (330) is in contact with the inner wall of the stator ring (210). An angle (321) is formed between the third contact surface (330) and the second contact surface (320), and the distance between the angles (321) is smaller than the distance between the second contact surfaces (320).

4. The electromagnetic driven angle deflection improved structure according to claim 3, characterized in that: A second limiting portion (331) is provided on the end surfaces of the second contact surface (320) and the third contact surface (330).

5. The electromagnetic driven angle deflection improved structure according to claim 1, characterized in that: Positioning grooves (221) are arranged opposite to each other on the stator ring (210), and a protrusion (231) that matches the positioning groove (221) is arranged on the second tooth pole (230). The protrusion (231) and the positioning groove (221) are used for connecting the stator ring (210) and the second tooth pole (230) for disassembly. The stator ring (210) is formed by stacking and stamping sheets, and the material of the permanent magnet (120) is neodymium iron boron.

6. A deflecting mirror device, characterized in that: The electromagnetically driven angle deflection improvement structure comprises the one described in any one of claims 1 to 5.

7. The deflecting mirror arrangement according to claim 6, characterized in that The invention comprises a shell (500) wrapped around a stator ring (210), a front cover (510) and a rear cover (520) are provided at both ends of the shell (500), a support shaft (111) is fixed to one end of the rotating shaft (110), a clamping portion (112) is provided at the end of the support shaft (111) away from the rotating shaft (110), the support shaft (111) passes through the front cover (510) so that the clamping portion (112) extends outside the front cover (510), and a control component (600) is provided on the side of the rear cover (520) away from the stator assembly (200).

8. The deflecting mirror arrangement according to claim 7, characterized in that A first channel (511) is provided in the front cover (510), the support shaft (111) passes through the first channel (511), a first bearing (530) is provided between the first channel (511) and the support shaft (111), the outer ring and the inner ring of the first bearing (530) are loosely fitted with the inner wall of the first channel (511) and the outer wall of the support shaft (111), respectively, and a limiting step (512) is provided on the support shaft (111) and the first channel (511) to prevent the first bearing (530) from moving on the axis.

9. The deflecting mirror arrangement according to claim 7, characterized in that A second channel (521) is provided in the rear cover (520), the rotating shaft (110) passes through the second channel (521), a second bearing (540) is provided between the second channel (521) and the rotating shaft (110), the outer ring and the inner ring of the second bearing (540) are loosely fitted with the inner wall of the second channel (521) and the outer wall of the rotating shaft (110), respectively, a positioning ring (522) and an elastic gasket (523) are provided at both axial ends of the second bearing (540), the elastic gasket (523) is pre-pressed on one side of the second bearing (540), and the positioning ring (522) and the elastic gasket (523) are used to prevent the second bearing (540) from moving on the axis.

10. The deflecting mirror arrangement according to claim 7, characterized in that The control component (600) comprises a control circuit board (610), the control circuit board (610) being electrically connected to the coil winding (400), a first gasket (620) covering a side of the control circuit board (610) away from the rear cover (520), a plurality of light-guiding grids (621) being provided on the first gasket (620), a light-shielding sheet (630) for shielding the light-guiding grids (621) being provided on the outer side of the first gasket (620), the rotating shaft (110) passing through the first gasket (620), the light-shielding sheet (630) being fixed on the rotating shaft (110) and rotating synchronously with the rotating shaft (110).

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