Improved moving coil deflection motor

Abstract

The utility model provides an improved moving coil type deflection motor, including base plate and pivot, first coil winding and second coil winding are all provided with in the both ends of base plate, first coil winding and second coil winding are symmetrical distribution to pivot, first permanent magnet group and second permanent magnet group are provided with respectively in the both ends of base plate, the polarity of the permanent magnet group all wraps two permanent magnet adjacent the permanent magnet, when first coil winding and second coil winding repeatedly deflect with pivot as the axis, first permanent magnet group and second permanent magnet group can form the coverage to the deflection range of first coil winding and second coil winding respectively. The application is through setting up magnet in coil winding both sides, makes the coil always to be under the even high intensity magnetic field coverage in whole movement range, has no magnetic field gradient interference, dynamic response is faster and more stable, to realize more accurate displacement and speed control, be more suitable for being applied to the precision instrument that needs high accuracy positioning.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more specifically to an improved moving-coil deflection motor. Background Technology

[0002] A moving-coil motor typically refers to a motor in which permanent magnets are placed on both sides of a sheet-like winding. By energizing the winding, a magnetic field is generated, and the interaction between the magnetic field of the winding and the magnetic field of the permanent magnets drives the sheet-like winding to rotate.

[0003] US Patent No. 10133059B2 discloses a moving coil motor, which is similar in principle to the one mentioned above. However, in the above patent, when the winding is rotating, the permanent magnet cannot completely cover it. Therefore, the entire coil cannot always be in a uniform magnetic field throughout the entire range of motion. Consequently, under the interference of magnetic field gradient, it is impossible to achieve more precise displacement, speed or force control of the winding rotation. Summary of the Invention

[0004] To address the aforementioned problems, this application provides an improved moving-coil deflection motor, comprising a base plate and a rotating shaft passing through the end face of the base plate. A first coil winding and a second coil winding are evenly distributed on both end faces of the base plate, symmetrically distributed with respect to the rotating shaft. A first permanent magnet group and a second permanent magnet group with opposite polarities are respectively disposed on both end faces of the base plate, suspended outside the first coil winding and the second coil winding. When the first coil winding and the second coil winding are energized, the first coil winding and the second coil winding repeatedly deflect around the rotating shaft as the axis, and the first permanent magnet group and the second permanent magnet group can respectively cover the deflection range of the first coil winding and the second coil winding.

[0005] Furthermore, the substrate includes at least one rigid plate, the first coil winding and the second coil winding are arranged on the substrate in parallel or in series, the rotating shaft has a hollow structure, conductive points are provided on the substrate, the conductive points are respectively connected to the first coil winding and the second coil winding, and conductive lines are provided in the rotating shaft, the conductive lines pass through the rotating shaft and are electrically connected to the conductive points.

[0006] Furthermore, both the first permanent magnet group and the second permanent magnet group are composed of two permanent magnets with the same polarity. The overall shape of the first coil winding, the second coil winding, and the permanent magnets are all fan-shaped. A first coil boundary and a second coil boundary are formed on both sides along the length direction of the first coil winding and the second coil winding. A first magnet boundary and a second magnet boundary are formed on both sides along the length direction of the first permanent magnet group and the second permanent magnet group.

[0007] Furthermore, a first hollow portion is formed in both the first coil winding and the second coil winding. The first hollow portion forms a first inner boundary and a second inner boundary of the coil in the first coil winding and the second coil winding. A first inner boundary and a second inner boundary of the magnet are formed on the opposite inner side between the permanent magnets of the first permanent magnet group and the second permanent magnet group.

[0008] Furthermore, within the first coil winding and the second coil winding, the wiring pattern between the boundary of the first coil and the inner boundary of the first coil, as well as the boundary of the second coil and the inner boundary of the second coil, is a straight line.

[0009] Furthermore, a first coil arc surface and a second coil arc surface are connected between the inner boundary of the first coil and the inner boundary of the second coil. A first magnet arc surface and a second magnet arc surface are also connected between the first magnet boundary and the inner boundary of the first magnet, as well as between the second magnet boundary and the inner boundary of the second magnet. The arc and distance between the first coil arc surface and the first magnet arc surface, and between the second coil arc surface and the second magnet arc surface, are the same.

[0010] Furthermore, a first reference line is provided in the middle between the inner boundary of the first coil and the inner boundary of the second coil in the first hollow part. When the first coil winding and the second coil winding are not energized, the angle between the inner boundary of the first magnet and the inner boundary of the second magnet and the first reference line is between 7 degrees and 7.5 degrees.

[0011] Furthermore, a fixing seat is provided between the substrate, the first permanent magnet group, and the second permanent magnet group. The rotating shaft passes through the fixing seat and can rotate within the fixing seat. A fixing plate is provided within the fixing seat. The fixing plate is arranged parallel to the substrate. Both the first permanent magnet group and the second permanent magnet group are fixed within the fixing plate.

[0012] Furthermore, an end cap is provided on one side of the fixed base, the rotating shaft extends out from the end cap, a limiting groove is provided inside the end cap, a limiting rod is provided inside the limiting groove, and the limiting rod is inserted into the rotating shaft along the vertical direction of the rotating shaft.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Compared with the prior art:

[0015] This application sets permanent magnet groups on the outside of the first and second coil windings respectively. When the first and second coil windings are energized, the permanent magnet groups can cover the deflection range of the first and second coil windings. In this way, the coil is always in a uniform magnetic field throughout the entire range of motion. The generated Lorentz force is strictly proportional to the current, and there is no need to compensate for the influence of nonlinear magnetic field distribution. In addition, the uniform magnetic field ensures that the acceleration of the coil is determined only by the current, without magnetic field gradient interference, resulting in faster and more stable dynamic response. Thus, under the same output force, the linear relationship of this application simplifies the control algorithm and enables more precise displacement, speed or force control, which is suitable for high-precision positioning (such as optical equipment and precision instruments). In addition, compared with the prior art, this application sets magnets on both sides of the coil, which has a better magnetic field strength than setting magnets on one side.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the overall structure of the present invention;

[0019] Figure 2 This is a diagram showing the positional relationship between the substrate, the first permanent magnet group, and the second permanent magnet group in the initial state of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the fixing base of the present invention;

[0021] Figure 4 This is a diagram showing the positional relationship between the permanent magnet and the first hollowed-out portion in the initial state of the present invention;

[0022] Figure 5 This is a diagram showing the positional relationship between the permanent magnet and the first reference line in the initial state of the present invention;

[0023] Figure 6 This is a schematic diagram of the end cap structure of the present invention.

[0024] The reference numerals and names in the figure are as follows:

[0025] Substrate 100, rotating shaft 200, first coil winding 110, second coil winding 120, first permanent magnet group 10, second permanent magnet group 20, permanent magnet 11, first coil boundary 111, second coil boundary 112, first magnet boundary 310, second magnet boundary 320, first hollow part 130, first coil inner boundary 131, second coil inner boundary 132, first magnet inner boundary 331, second magnet inner boundary 332, first coil arc surface 133, second coil arc surface 134, first magnet arc surface 333, second magnet arc surface 334, first reference line 135, conductive point 150, conductive line 210, fixing seat 400, fixing plate 410, end cap 420, limiting groove 421, limiting rod 220. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The present invention will now be described in more detail. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them.

[0028] In the description of this invention, it should be noted that directional terms such as "front," "rear," "up," "down," "left," "right," "horizontal," "vertical," "horizontal," and "top," "bottom," etc., indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not 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 limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours of each component itself. In the description of this invention, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0030] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0031] The preferred embodiments of the present invention will now be further described with reference to the accompanying drawings, such as... Figure 1 As shown, an improved moving-coil deflection motor includes a base plate 100 and a rotating shaft 200 passing through the end face of the base plate 100. A first coil winding 110 and a second coil winding 120 are evenly distributed on both end faces of the base plate 100, symmetrically distributed with respect to the rotating shaft 200. A first permanent magnet assembly 10 and a second permanent magnet assembly 20 are respectively disposed on both end faces of the base plate 100, each of which encloses two permanent magnets 11. The adjacent permanent magnets 11 have opposite polarities. The first permanent magnet group 10 and the second permanent magnet group 20 are respectively suspended outside the first coil winding 110 and the second coil winding 120. When the first coil winding 110 and the second coil winding 120 are energized, the first coil winding 110 and the second coil winding 120 repeatedly deflect around the axis 200. The first permanent magnet group 10 and the second permanent magnet group 20 can respectively cover the deflection range of the first coil winding 110 and the second coil winding 120.

[0032] In this embodiment, the rotating shaft 200 passes through the end face of the substrate 100 and is fixedly connected to the substrate 100. A first coil winding 110 and a second coil winding 120 are respectively provided on the positive and negative end faces of the substrate 100, and the first coil winding 110 and the second coil winding 120 are symmetrically distributed with respect to the rotating shaft 200. A first permanent magnet group 10 and a second permanent magnet group 20 are suspended outside the first coil winding 110 and the second coil winding 120, and their polarities are opposite. For example: Figure 1As shown, the two permanent magnets in the first permanent magnet group 10 and the second permanent magnet group are N pole and S pole, respectively, and the polarities of the two adjacent permanent magnets 11 are opposite. Thus, in the working state of this embodiment, when the first coil winding 110 and the second coil winding 120 are energized simultaneously, a coil magnetic field is generated. The coil magnetic field interacts with the magnetic field of the first permanent magnet group 10 and the second permanent magnet group 20, thereby driving the substrate 100 to deflect around the axis 200. During this process, the axis 200 also rotates synchronously. When the current direction of the first coil winding 110 and the second coil winding 120 is changed, the direction of the generated coil magnetic field will be opposite. Therefore, it will have an opposite interaction with the magnetic field of the first permanent magnet group 10 and the second permanent magnet group 20, thus driving the substrate 100 to deflect in the opposite direction around the axis 200, thereby causing the axis 200 to deflect repeatedly within a certain angle.

[0033] This application provides a permanent magnet group outside the first coil winding 110 and the second coil winding 120. When the first coil winding 110 and the second coil winding 120 are energized, the permanent magnet group can cover the deflection range of the first coil winding 110 and the second coil winding 120. In this way, the coil is always in a uniform magnetic field throughout the entire range of motion. The generated Lorentz force is strictly proportional to the current, and there is no need to compensate for the influence of nonlinear magnetic field distribution. In addition, the uniform magnetic field ensures that the acceleration of the coil is determined only by the current, without magnetic field gradient interference, resulting in faster and more stable dynamic response. Thus, under the same output force, the linear relationship of this application simplifies the control algorithm and enables more precise displacement, speed or force control, which is suitable for high-precision positioning (such as optical equipment and precision instruments). In addition, compared with the prior art, this application provides magnets on both sides of the coil, which has a better magnetic field strength than providing magnets on one side.

[0034] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 3 As shown, the substrate 100 includes at least one rigid board, which includes a PCB circuit board or other board material that can be used for imprinting wiring. The first coil winding 110 and the second coil winding 120 are arranged in parallel or in series on the substrate 100. The rotating shaft 200 has a hollow structure. Conductive points 150 are provided on the substrate 100. The conductive points 150 are respectively connected to the first coil winding 110 and the second coil winding 120. A conductive line 210 is provided in the rotating shaft 200. The conductive line 210 passes through the rotating shaft 200 and is electrically connected to the conductive points 150. In this way, when the first coil winding 110 and the second coil winding 120 are energized and drive the substrate 100 to rotate, the electrical connection between the conductive line 210 and the substrate will not be affected during the synchronous rotation of the rotating shaft 200.

[0035] Furthermore, based on the above embodiments, combined with Figures 2 to 3 As shown, the first coil winding 110 and the second coil winding 120, as well as their permanent magnets 11, are all fan-shaped. A first coil boundary 111 and a second coil boundary 112 are formed on both sides of the length direction of the first coil winding 110 and the second coil winding 120. A first magnet boundary 310 and a second magnet boundary 320 are formed on both sides of the length direction of the first permanent magnet group 10 and the second permanent magnet group 20. When the substrate 100 is deflected, the first coil boundary 111 on one side of the rotating shaft 200 coincides with the first magnet boundary 310, and the second coil boundary 112 and the second magnet boundary 320 on the other side of the rotating shaft 200 coincide. In this way, when the first coil winding 110 and the second coil winding 120 are repeatedly deflected around the rotating shaft 200, the first permanent magnet group 10 and the second permanent magnet group 20 can respectively cover the deflection range of the first coil winding 110 and the second coil winding 120.

[0036] Furthermore, based on the above embodiments, combined with Figures 2 to 3 As shown, a first hollow portion 130 is formed in both the first coil winding 110 and the second coil winding 120. The first hollow portion 130 forms a first coil inner boundary 131 and a second coil inner boundary 132 within the first coil winding 110 and the second coil winding 120. A first magnet inner boundary 331 and a second magnet inner boundary 332 are formed on the opposite inner sides between the permanent magnets 11 of the first permanent magnet group 10 and the second permanent magnet group 20. When the substrate 100 is deflected, the second coil inner boundary 132 on one side of the rotating shaft 200 coincides with the second magnet inner boundary 332. The rotating shaft 200 coincides with the inner boundary 131 of the first coil and the inner boundary 332 of the second magnet on the opposite side. Thus, when the first coil winding 110 and the second coil winding 120 deflect, the portion of the coil between the inner boundary 131 and the first coil boundary 111 will be within the coverage of the first permanent magnet group 10, and the portion of the coil between the inner boundary 132 and the second coil boundary 112 will be within the coverage of the second permanent magnet group 20. This further enhances the coverage of the deflection range of the first coil winding 110 and the second coil winding 120 by the permanent magnet group. Preferably, within the first coil winding 110 and the second coil winding 120, the wiring patterns between the first coil boundary 111 and the inner boundary 131, and between the second coil boundary 112 and the inner boundary 132, are straight lines.

[0037] Furthermore, based on the above embodiments, combined with Figure 4 and Figure 5As shown, a first coil arc surface 133 and a second coil arc surface 134 connect the inner boundary 131 of the first coil and the inner boundary 132 of the second coil. A first magnet arc surface 333 and a second magnet arc surface 334 also connect the first magnet boundary 310 and the inner boundary 331 of the first magnet, as well as the second magnet boundary 320 and the inner boundary 332 of the second magnet. The curvature and distance between the first coil arc surface 133 and the first magnet arc surface 333, and between the second coil arc surface 134 and the second magnet arc surface 334, are the same. Thus, when the substrate 100 rotates, the... The permanent magnet 11 is completely overlapped with the first hollowed-out portion 130. It can be seen that in this application, the interaction between the first coil winding 110 and the second coil winding 120 and the permanent magnet 11 is only affected by the straight section of the coil between the first coil boundary 111 and the first coil inner boundary 131 and the second coil boundary 112 and the second coil inner boundary 132. Therefore, compared with the prior art, the coil of this application is always in a more uniform magnetic field throughout the entire range of motion, thereby enabling more precise displacement, speed or force control, which is suitable for high-precision positioning.

[0038] Furthermore, based on the above embodiments, combined with Figure 4 and Figure 5 As shown, a first reference line 135 is provided in the middle between the inner boundary 131 and the inner boundary 132 of the first coil in the first hollow portion 130. When the first coil winding 110 and the second coil winding 120 are not energized, the angle between the inner boundary 331 and the inner boundary 332 of the first magnet and the first reference line 135 is between 7 degrees and 7.5 degrees. In this way, when the inner boundary 131 and the inner boundary 132 of the first coil are energized and the substrate 100 starts to rotate, the permanent magnet 11 has enough space to swing within the first hollow portion 130. This can prevent the permanent magnet 11 from crossing the boundary 111 and the inner boundary 131 of the first coil, as well as the boundary 112 and the inner boundary 132 of the second coil, under the action of inertia. In addition, this angle can also avoid the problem that the gap between the permanent magnets 11 in this application is too large, which would result in the substrate 100 swinging with too large instantaneous torque and excessive inertia, making it impossible for the various boundaries mentioned above to coincide.

[0039] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 6As shown, a fixing seat 400 is provided between the substrate 100, the first permanent magnet group 10, and the second permanent magnet group 20. The rotating shaft 200 passes through the fixing seat 400 and can rotate within the fixing seat 400. A fixing plate 410 is provided within the fixing seat 400. The fixing plate 410 is arranged parallel to the substrate 100. The first permanent magnet group 10 and the second permanent magnet group 20 are both fixed within the fixing plate 410, thereby suspending them outside the first coil winding 110 and the second coil winding 120.

[0040] Furthermore, based on the above embodiments, combined with Figure 2 and Figure 6 As shown, an end cap 420 is provided on one side of the fixed base 400, and the rotating shaft 200 passes through the end cap 420. A limiting groove 421 is provided in the end cap 420, and a limiting rod 220 is provided in the limiting groove 421. The limiting rod 220 is inserted into the rotating shaft 200 along the vertical direction of the rotating shaft 200. In this way, when the substrate 100 deflects, the limiting groove 421 and the limiting rod 220 cooperate with each other to limit the deflection angle of the substrate 100.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An improved moving-coil deflection motor characterized by, The system includes a substrate (100) and a rotating shaft (200) passing through the end face of the substrate (100). A first coil winding (110) and a second coil winding (120) are evenly distributed on both end faces of the substrate (100). The first coil winding (110) and the second coil winding (120) are symmetrically distributed with respect to the rotating shaft (200). A first permanent magnet group (10) and a second permanent magnet group (20) are respectively provided on both end faces of the substrate (100). Each of the first permanent magnet group (10) and the second permanent magnet group (20) encloses two permanent magnets (11). Adjacent permanent magnets... The polarities of the bodies (11) are opposite. The first permanent magnet group (10) and the second permanent magnet group (20) are respectively suspended outside the first coil winding (110) and the second coil winding (120). When the first coil winding (110) and the second coil winding (120) are energized, the first coil winding (110) and the second coil winding (120) repeatedly deflect around the axis (200). The first permanent magnet group (10) and the second permanent magnet group (20) can respectively cover the deflection range of the first coil winding (110) and the second coil winding (120).

2. The improved moving-coil deflection motor of claim 1 wherein, The substrate (100) includes at least one rigid plate. The first coil winding (110) and the second coil winding (120) are arranged on the substrate (100) in parallel or in series. The rotating shaft (200) has a hollow structure. Conductive points (150) are provided on the substrate (100). The conductive points (150) are respectively connected to the first coil winding (110) and the second coil winding (120). Conductive lines (210) are provided in the rotating shaft (200). The conductive lines (210) pass through the rotating shaft (200) and are electrically connected to the conductive points (150).

3. The improved moving-coil deflection motor of claim 2 wherein, The first coil winding (110) and the second coil winding (120) and their permanent magnets (11) are all fan-shaped. A first coil boundary (111) and a second coil boundary (112) are formed on both sides of the length direction of the first coil winding (110) and the second coil winding (120). A first magnet boundary (310) and a second magnet boundary (320) are formed on both sides of the length direction of the first permanent magnet group (10) and the second permanent magnet group (20).

4. The improved moving-coil deflection motor according to claim 3, characterized in that, A first hollow portion (130) is formed in both the first coil winding (110) and the second coil winding (120). The first hollow portion (130) forms a first inner boundary (131) and a second inner boundary (132) in the first coil winding (110) and the second coil winding (120). A first inner boundary (331) and a second inner boundary (332) are formed on the opposite inner side between the permanent magnets (11) of the first permanent magnet group (10) and the second permanent magnet group (20).

5. The improved moving-coil deflection motor according to claim 4, characterized in that, Within the first coil winding (110) and the second coil winding (120), the wiring pattern between the first coil boundary (111) and the first coil inner boundary (131), as well as the second coil boundary (112) and the second coil inner boundary (132), is a straight line.

6. The improved moving-coil deflection motor according to claim 5, characterized in that, The first coil inner boundary (131) and the second coil inner boundary (132) are connected by a first coil arc surface (133) and a second coil arc surface (134). The first magnet boundary (310) and the first magnet inner boundary (331) and the second magnet boundary (320) and the second magnet inner boundary (332) are both connected by a first magnet arc surface (333) and a second magnet arc surface (334). The arc and distance between the first coil arc surface (133) and the first magnet arc surface (333), and between the second coil arc surface (134) and the second magnet arc surface (334) are the same.

7. The improved moving-coil deflection motor according to claim 6, characterized in that, A first reference line (135) is provided in the middle between the inner boundary (131) of the first coil and the inner boundary (132) of the second coil in the first hollow part (130). When the first coil winding (110) and the second coil winding (120) are not energized, the angle between the inner boundary (331) of the first magnet and the inner boundary (332) of the second magnet and the first reference line (135) is between 7 degrees and 7.5 degrees.

8. The improved moving-coil deflection motor according to claim 1, characterized in that, A fixing seat (400) is provided between the substrate (100), the first permanent magnet group (10), and the second permanent magnet group (20). The rotating shaft (200) passes through the fixing seat (400) and can rotate within the fixing seat (400). A fixing plate (410) is provided within the fixing seat (400). The fixing plate (410) is arranged parallel to the substrate (100). Both the first permanent magnet group (10) and the second permanent magnet group (20) are fixed within the fixing plate (410).

9. The improved moving-coil deflection motor according to claim 8, characterized in that, An end cap (420) is provided on one side of the fixed base (400), and the rotating shaft (200) extends out from the end cap (420). A limiting groove (421) is provided in the end cap (420), and a limiting rod (220) is provided in the limiting groove (421). The limiting rod (220) is inserted into the rotating shaft (200) along the vertical direction of the rotating shaft (200).

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