Actuator and projection device

Abstract

The application relates to an actuator and a projection device. The actuator comprises a stator, a mover, a connecting part and an electromagnetic driving part. The stator and the mover are connected through the connecting part. The connecting part comprises a flip shaft part and a torsion shaft part. The electromagnetic driving part comprises a first magnetic force part and a second magnetic force part. The first magnetic force part is arranged on the connecting part and located between the flip shaft part and the torsion shaft part. The second magnetic force part comprises a first coil part and a second coil part. The first coil part is opposite to the first magnetic force part, and the first coil part and the first magnetic force part generate magnetic attraction or repulsion to make the connecting part generate a flip motion around the flip shaft part. The second coil part comprises two groups of sub-coils, which are arranged on two sides of the torsion shaft part and opposite to the first magnetic force part. The two groups of sub-coils of the second coil part and the first magnetic force part generate torsion magnetic force to make the mover generate a torsion motion around the torsion shaft part relative to the stator and the connecting part.

Description

Technical Field

[0001] This application relates to the fields of projection and other products, and more particularly to an actuator and projection device. Background Technology

[0002] In products such as projection devices, optical actuators are required to achieve technologies and effects such as XPR (Extended Pixel Resolution), and these optical actuators need to achieve movement in two directions. Currently, the optical actuators used in projection devices achieve movement in both directions through two separate drive mechanisms, which results in numerous parts, complex structures, and high costs. Summary of the Invention

[0003] This application provides an optical actuator and a projection device to solve the problems of numerous parts, complex structure, and high cost of optical actuators in the prior art.

[0004] The actuator provided by the present invention includes a stator, a mover, a connecting portion, and an electromagnetic drive portion; the stator and the mover are connected by the connecting portion; the connecting portion includes a flip-rotating shaft portion and a torsion shaft portion; of the two portions, the flip-rotating shaft portion is adjacent to the stator, and the torsion shaft portion is adjacent to the mover; the electromagnetic drive portion includes a first magnetic force portion and a second magnetic force portion; the first magnetic force portion is disposed on the connecting portion and located between the flip-rotating shaft portion and the torsion shaft portion; the second magnetic force portion includes a first coil portion and a second coil portion; the first coil portion is provided with... The first coil portion is positioned below the connecting portion and opposite to the first magnetic portion. A magnetic force, either attracting or repelling, is generated between the first coil portion and the first magnetic portion, causing the connecting portion to rotate around the rotating shaft. The second coil portion is disposed on the moving part and includes two sets of sub-coils, which are respectively disposed on both sides of the torsion shaft and opposite to the first magnetic portion. A torsional magnetic force is generated between the two sets of sub-coils of the second coil portion and the first magnetic portion, causing the moving part to rotate around the torsion shaft relative to the stator and the connecting portion.

[0005] The first magnetic part is a magnet, and the first side of the first magnetic part exhibits unipolarity; the first coil part and the first side of the first magnetic part are arranged opposite to each other.

[0006] The first magnetic part is a magnet, and the second side of the first magnetic part is bipolar; the two sets of sub-coils of the second coil part are arranged opposite to the second side of the first magnetic part, and the two sets of sub-coils are respectively supplied with opposite currents.

[0007] The magnet of the first magnetic part includes two magnet units stacked together. The two magnet units have contact surfaces that are in contact with each other, and a non-magnetic region is formed at the contact surfaces. The surfaces of the two magnet units that are opposite to the contact surfaces form unipolar surfaces, and the surfaces adjacent to the contact surfaces form bipolar surfaces.

[0008] The connecting part, stator and mover are integrated into a spring-loaded structure.

[0009] The spring structure has a gap in the flipping shaft portion, which is used to reduce the resistance to the flipping motion generated by the flipping shaft portion.

[0010] The spring structure has notches on both sides of the torsion shaft portion, and the notches make the width of the torsion shaft portion smaller than the width of other areas of the connecting portion.

[0011] The shape of the connecting part can be any one of rectangle, square, trapezoid, rhombus, ellipse and circle.

[0012] The connecting portion includes a first pivot unit and a second pivot unit. The first pivot unit is axially disposed along the flip axis portion, and the second pivot unit is axially disposed along the torsion axis portion. One end of the first pivot unit is connected to the stator, and one end of the second pivot unit is connected to the mover.

[0013] The actuator further includes a substrate, which is fixedly connected to the stator.

[0014] The projection device provided by the present invention includes the actuator described above.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art:

[0016] The actuator and projection device provided in this invention have a connecting portion comprising a flipping shaft and a torsion shaft. Based on these two shafts, the connecting portion can achieve the following: first, with the flipping shaft as the rotation axis, the connecting portion can perform a flipping motion, thereby enabling relative flipping between the stator and the mover connected to the connecting portion; and second, with the torsion shaft as the rotation axis, the connecting portion can perform a torsion motion, thereby enabling relative torsion between the stator and the mover connected to the connecting portion. Furthermore, the aforementioned flipping and torsion motion processes of the connecting portion only require a single electromagnetic drive unit, eliminating the need for additional drive components. This results in a lower cost and a simpler, easier-to-implement actuator. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 A schematic diagram of the stator, mover, and connecting part in the actuator provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the actuator provided in an embodiment of the present application from one perspective.

[0022] Figure 3 A schematic diagram of the actuator provided in an embodiment of this application from another perspective;

[0023] Figure 4 This is an exploded view of the actuator provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the first magnetic part of the actuator in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the actuator in the side view of an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of two magnetic systems formed between the first magnetic part and the second magnetic part in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the relative motion between the stator and the mover in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10-Substrate; 11-Stator; 12-Motor;

[0030] 13-Connecting part; 131-Flipping shaft part; 1311-Gap; 132-Torsion shaft part;

[0031] 141 - First magnetic section; 142 - Second magnetic section; 1421 - First coil section; 1422 - Second coil section;

[0032] 15-Gap;

[0033] 16-Glass plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0036] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0037] In one embodiment of the actuator of the present invention, such as Figures 1 to 8As shown, the actuator includes a stator 11, a mover 12, a connecting portion 13, and an electromagnetic drive portion. The stator 11 and the mover 12 are connected by the connecting portion 13; the connecting portion 13 includes a flip shaft portion 131 and a torsion shaft portion 132; of the two portions, the flip shaft portion 131 is adjacent to the stator 11, and the torsion shaft portion 132 is adjacent to the mover 12. The electromagnetic drive portion includes a first magnetic force portion 141 and a second magnetic force portion 142. The first magnetic force portion 141 is disposed on the connecting portion 13 and located between the flip shaft portion 131 and the torsion shaft portion 132. The second magnetic force portion 142 includes a first coil portion 1421 and a second coil portion 1422. The first coil portion 1421 is disposed on the lower side of the connecting portion 13 and opposite to the first magnetic portion 141. An attractive or repulsive magnetic force is generated between the first coil portion 1421 and the first magnetic portion 141, causing the connecting portion 13 to rotate around the rotating shaft portion 131. The second coil portion 1422 is disposed on the mover 12 and includes two sets of sub-coils. The two sets of sub-coils are respectively disposed on both sides of the torsion shaft portion 132 and opposite to the first magnetic portion 141. A torsional magnetic force is generated between the two sets of sub-coils of the second coil portion 1422 and the first magnetic portion 141, causing the mover 12 to rotate around the torsion shaft portion 132 relative to the stator 11 and the connecting portion 13.

[0038] In this embodiment, it should be emphasized that the specific folding and twisting angle range of the connecting part 13 around the flipping axis 131 and the twisting around the torsion axis 132 is not limited. Whether the folding angle or the twisting angle of the connecting part 13 reaches 90 degrees or the angle is less than 1 degree, as long as the connecting part 13 flips around the flipping axis 131 and twists around the torsion axis 132, thereby driving the stator 11 and the mover 12 to produce relative movements of flipping and twisting, it falls within the scope of flipping and twisting as referred to in this invention.

[0039] In this embodiment, the actuator is applied in a projection device to achieve XPR (Extended Pixel Resolution). The flip angle of the connecting part 13 around the flip axis 131 and the torsion angle around the torsion axis 132 are both small, generally not exceeding 1 degree. The intuitive motion state belongs to or is approximately a reciprocating swing oscillation state centered on the flip axis 131 and the torsion axis 132, but it is within the range defined in this embodiment and is protected by the solution of this embodiment.

[0040] In this embodiment, the stator 11 and mover 12 of the actuator are respectively connected to other devices. The stator 11 and mover 12 are connected by a connecting part 13, and through the connecting part 13, the stator 11 and mover 12 can achieve relative movement, thereby driving the other devices connected to the stator 11 and mover 12 to perform corresponding movement processes. Specifically, the actuator also includes a substrate 10, and is also connected to a glass plate 16; the stator 11 can be fixedly connected to the substrate 10, and the mover 12 can be connected to the glass plate 16. When the mover 12 moves relative to the stator 11, the glass plate 16 also moves correspondingly relative to the substrate 10.

[0041] In this embodiment, on one hand, the connecting part 13 can rotate about the rotating shaft 131. When the connecting part 13 rotates about the rotating shaft 131, the stator 11 and the mover 12 follow the movement of the connecting part 13. The stator 11 and the mover 12 can also rotate relative to each other about the rotating shaft 131, tending to fit together or tending to open. On the other hand, the connecting part 13 can also rotate about the torsion shaft 132. When the connecting part 13 rotates about the second direction Y, the stator 11 and the mover 12 follow the movement of the connecting part 13. The stator 11 and the mover 12 can also rotate, for example, from a parallel state (specifically, the stator 11 and the mover 12 as a whole, or their adjacent edges) to a relatively inclined state.

[0042] In this embodiment, the flipping of the connecting part 13 with the flipping shaft 131 as the axis and the twisting with the torsion shaft 132 as the axis are driven by the electromagnetic drive unit. Specifically, the electromagnetic drive unit includes a first magnetic part 141 and a second magnetic part 142. The second magnetic part 142 further includes a first coil part 1421 and a second coil part 1422. After the first coil part 1421 and the second coil part 1422 are input with current, they can generate magnetic force. The magnetic force generated by the first coil part 1421 and the magnetic force generated by the second coil part 1422 interact with the magnetic force of the first magnetic part 141, generating attraction or repulsion forces. Based on the attraction or repulsion forces generated between the first coil part 1421 and the first magnetic part 141, and the attraction or repulsion forces generated between the second coil part 1422 and the first magnetic part 141 (forming torsional magnetic force), they can act on the stator 11, the mover 12 and the connecting part 13, so that the flipping shaft part 131 and the torsional shaft part 132 of the connecting part 13 are called rotation shafts, and respectively generate flipping motion and torsional motion.

[0043] In this embodiment, the first magnetic part 141 is disposed on the connecting part 13 and located between the flipping shaft part 131 and the torsion shaft part 132; the first coil part 1421 is disposed on the lower side of the connecting part 13 and opposite to the first magnetic part 141. When the first coil part 1421 is supplied with current, a magnetic force of attraction or repulsion is generated between it and the first magnetic part 141. Based on this magnetic force, the first magnetic part 141 and the connecting part 13 connected to it will move relatively closer or further away from the first coil part 1421. This relative proximity or distance acts on the connecting part 13 (the position of the first coil part 1421 is fixed and fixedly disposed on the substrate 10), that is, it causes the connecting part 13 to rotate around the flipping shaft part 131.

[0044] In this embodiment, the second coil section 1422 is disposed on the mover 12. The second coil section 1422 includes two sets of sub-coils, which are respectively disposed on both sides of the torsion shaft section 132 and opposite to the first magnetic force section 141. When the two sets of sub-coils of the second coil section 1422 are supplied with current (the supplied currents are opposite), they generate magnetic forces of attraction or repulsion with the first magnetic force section 141 (one side is an attraction magnetic force, and the other side is a repulsion magnetic force). Since the two sub-coils are respectively located on both sides of the torsion shaft section 132, the attraction magnetic force and the repulsion magnetic force act on the second coil section 1422 and the mover 12 connected to the second coil section 1422, causing it to generate a torsional motion around the torsion shaft section 132.

[0045] The actuator provided in this embodiment has a connecting portion 13 including a flipping shaft portion 131 and a torsion shaft portion 132. Based on the flipping shaft portion 131 and the torsion shaft portion 132, the connecting portion 13 can achieve the following: First, with the flipping shaft portion 131 as the rotation axis, the connecting portion 13 can perform a flipping motion, thereby enabling the stator 11 and the mover 12 connected to the connecting portion 13 to flip relative to each other; and second, with the torsion shaft portion 132 as the rotation axis, the connecting portion 13 can perform a torsion motion, thereby enabling the stator 11 and the mover 12 connected to the connecting portion 13 to torsion relative to each other. Furthermore, the above-mentioned flipping motion and torsion motion of the connecting portion 13 only need to be realized by one electromagnetic drive unit, without the need for additional drive components. This makes the actuator of this embodiment of the invention low in cost and simple in structure, and easy to implement.

[0046] In one embodiment of the present invention, the first magnetic part 141 is a magnet, and the first side of the first magnetic part 141 exhibits unipolarity. The first coil part 1421 and the first side of the first magnetic part 141 are disposed opposite to each other.

[0047] In this embodiment, the first magnetic component 141 is a magnet. Magnets are a conventional structure for achieving magnetic force, and they are readily available and inexpensive. Choosing a magnet as the first magnetic component 141 helps to reduce the overall cost of the actuator. Of course, in actual implementation, the first magnetic component 141 can also be other devices with magnetic force, such as electromagnets.

[0048] In this embodiment, the first side of the first magnetic part 141 is opposite to the first coil part 1421, and the first side of the first magnetic part 141 is unipolar. Thus, when the first coil part 1421 is supplied with current, if it generates a magnetic force of the same polarity as the first side of the first magnetic part 141, a repulsive force will be formed between the first magnetic part 141 and the first coil part 1421; conversely, if the first coil part 1421 generates a magnetic force of the opposite polarity to the first side of the first magnetic part 141 when supplied with current, an attractive force will be formed between the first magnetic part 141 and the first coil part 1421. Based on the repulsive or attractive force between the first magnetic part 141 and the first coil part 1421, the connecting part 13 connected to the first magnetic part 141 will be driven to rotate relative to the stator 11 around the rotating shaft part 131, achieving relative rotation with the stator 11.

[0049] In one embodiment of the present invention, the first magnetic part 141 is a magnet, and the second side of the first magnetic part 141 exhibits bipolarity. The second coil part 1422 is disposed opposite to the second side of the first magnetic part 141. The two sets of sub-coils of the second coil part 1422 are respectively supplied with opposite currents.

[0050] In this embodiment, the first magnetic part 141 is also selected as a magnet, with its second side facing the second coil part 1422. The magnetism of this second side is bipolar. On the opposite side of the first magnetic part 1422, the second coil part 1422 includes two sets of sub-coils. When current is input to the second coil part 1422, opposite currents are specifically input to the two sets of sub-coils. Under the influence of the bipolarity of the second side of the first magnetic part 141, the two sets of sub-coils of the second coil part 1422 will generate opposite forces. Based on these opposite forces, the second coil part 1422 and the mover 12 fixedly connected to the second coil part 1422 will tend to twist. The two sets of sub-coils of the second coil part 1422 are respectively arranged on both sides of the connecting part 13. The aforementioned opposite forces act on the mover 12, ultimately driving the mover 12 to twist around the torsion axis 132.

[0051] In one embodiment of the present invention, the magnet of the first magnetic part 141 includes two magnet units stacked together, the two magnet units having contact surfaces that are in contact with each other, and a non-magnetic region is formed at the contact surfaces; and the surfaces of the two magnet units that are opposite to the contact surfaces form unipolar surfaces, and the surfaces adjacent to the contact surfaces form bipolar surfaces.

[0052] In this embodiment, the magnet of the first magnetic part 141 is composed of two magnet units, which has a simple structure and low cost. When combining two magnet units to form the magnet of the first magnetic part 141, taking each magnet unit as a cuboid as an example, the top and bottom surfaces of the two magnet units are joined together to form the contact surface of the non-magnetic region. The other top and bottom surfaces of the two magnet units are opposite to the contact surface and have unipolar magnetism; either one can serve as the first side in the aforementioned embodiment. The four sides after the two magnet units are joined together have bipolar magnetism, and any one of these four can serve as the second side in the aforementioned embodiment.

[0053] In one embodiment of the present invention, the connecting part 13, the stator 11 and the mover 12 are an integral spring sheet structure.

[0054] In this embodiment, the stator 11, the mover 12 and the connecting part 13 are set as an integrated spring sheet structure, which can be obtained by direct processing in one step during the preparation process without the need for additional assembly process. It is very simple and convenient, and the preparation cost is low.

[0055] In this embodiment, when the connecting part 13 is folded or twisted, according to the physical characteristics of the spring piece in the connecting area 13, it can be deformed under the action of external force (based on the repulsive or attractive force generated by the magnetism of the first magnetic part 141, the first coil part 1421, and the second coil part 1422). Depending on the direction of the force, it can form a folding motion around the folding axis 131 and a torsional motion around the torsional axis 132.

[0056] Of course, in actual implementation, the stator 11, the mover 12 and the connecting part 13 can also be separate structures. After the three are prepared and formed separately, they are assembled to obtain the overall structure.

[0057] In one embodiment of the present invention, the spring structure has a gap 1311 in the flip shaft portion 131, the gap 1311 being used to reduce the resistance to the flipping motion generated by the flip shaft portion 131.

[0058] Understandably, with the gap 1311 provided, the area that needs to be deformed when the flipping motion is performed at the flipping shaft 131 is smaller, the resistance that needs to be overcome to achieve deformation, i.e. the external force required to achieve deformation, is also smaller, thus making it easier to achieve the flipping motion, and the current required to be input to the first coil section 1421 to achieve the flipping motion is smaller.

[0059] In this embodiment, a single slit 1311 can be provided, and the shape of the slit 1311 can be a long strip. Alternatively, multiple slits 1311 can be provided, each of which can be a short strip. The multiple slits 1311 are arranged sequentially at intervals along the length direction of the flip shaft portion 131.

[0060] In one embodiment of the present invention, the spring structure has notches 15 on both sides of the torsion shaft portion 132, the notches 15 making the width of the torsion shaft portion 132 smaller than the width of other areas of the connecting portion 13.

[0061] In this embodiment, notches 15 are provided on both sides of the torsion shaft portion 132, which makes it easier for the mover 12 to twist around the torsion shaft portion 132 as the axis. The resistance to the torsion of the mover 12 is smaller, and the angle of torsion is larger.

[0062] In one embodiment of the present invention, the shape of the torsion shaft portion 132 is any one of a rectangle, square, trapezoid, rhombus, ellipse and circle.

[0063] In this embodiment, the shape of the torsion shaft 132 can be selected as a common geometric structure such as rectangle, square, trapezoid, rhombus, ellipse, or circle, depending on actual needs and ease of preparation. Of course, in addition, it can also be other more complex structural shapes or irregular shapes.

[0064] In one embodiment of the present invention, the connecting portion includes a first pivot unit and a second pivot unit, wherein the axial direction of the first pivot unit is disposed along the flip axis portion 131, and the axial direction of the second pivot unit is disposed along the torsion axis portion 132; one end of the first pivot unit is connected to the stator, and one end of the second pivot unit is connected to the mover.

[0065] Unlike the aforementioned embodiment where the connecting part 13 is a spring piece, in this embodiment, the connecting part 13 includes a first pivot unit and a second pivot unit. Specifically, the connecting part 13 forms a folding motion by rotating at the first pivot unit and a torsional motion by rotating at the second pivot unit, rather than achieving folding and torsional motion based on the physical properties of the material of the connecting part 13 itself.

[0066] In this embodiment, the first pivot unit and the second pivot unit of the connecting part can be directly connected. Alternatively, they can be indirectly connected; for example, the connecting part 13 may further include a base, on which the first pivot unit and the second pivot unit are respectively disposed. The base is connected to the stator via the first pivot unit and to the mover via the second pivot unit.

[0067] In summary, the actuator described in the above embodiments of the present invention has a connecting portion 13 comprising a flipping shaft portion 131 and a torsion shaft portion 132. Based on the flipping shaft portion 131 and the torsion shaft portion 132, the connecting portion 13 can achieve the following: first, with the flipping shaft portion 131 as the rotation axis, the connecting portion 13 can perform a flipping motion, thereby enabling the stator 11 and the mover 12 connected to the connecting portion 13 to flip relative to each other; and second, with the torsion shaft portion 132 as the rotation axis, the connecting portion 13 can perform a torsion motion, thereby enabling the stator 11 and the mover 12 connected to the connecting portion 13 to torsion relative to each other. Furthermore, the above-mentioned flipping motion and torsion motion of the connecting portion 13 only need to be achieved by one electromagnetic drive unit, without the need for additional drive components. This makes the actuator of the embodiments of the present invention low in cost and simple in structure, and easy to implement.

[0068] In an embodiment of the projection device provided by the present invention, the projection device includes the actuator described in any of the above embodiments.

[0069] The projection device provided in this embodiment includes the actuator described in the above embodiments, and has all the features of the actuator described in the above embodiments. Naturally, it has the same beneficial effects as the actuator described in the above embodiments, and will not be described again.

[0070] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0071] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0072] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An actuator, characterized in that, The actuator includes a stator, a mover, a connecting part, and an electromagnetic drive part; The stator and the mover are connected by the connecting portion; the connecting portion includes a flip shaft portion and a torsion shaft portion; of the two portions, the flip shaft portion is adjacent to the stator and the torsion shaft portion is adjacent to the mover. The electromagnetic drive unit includes a first magnetic part and a second magnetic part; the first magnetic part is disposed on the connecting part and located between the flip shaft part and the torsion shaft part; the second magnetic part includes a first coil part and a second coil part. The first coil portion is disposed on the lower side of the connecting portion and is opposite to the first magnetic portion. The first coil portion and the first magnetic portion generate magnetic forces that attract or repel each other, so that the connecting portion generates a flipping motion around the flipping axis. The second coil section is disposed on the mover, and the second coil section includes two sets of sub-coils. The two sets of sub-coils are respectively disposed on both sides of the torsion shaft section and opposite to the first magnetic section. The two sets of sub-coils of the second coil section and the first magnetic section generate a torsional magnetic force, so that the mover generates a torsional motion around the torsion shaft section relative to the stator and the connecting part.

2. The actuator according to claim 1, characterized in that, The first magnetic part is a magnet, and the first side of the first magnetic part exhibits unipolarity; The first coil portion and the first magnetic portion are arranged opposite each other on their first sides.

3. The actuator according to claim 1, characterized in that, The first magnetic part is a magnet, and the second side of the first magnetic part exhibits bipolarity; The two sets of sub-coils of the second coil section are arranged opposite to the second side of the first magnetic section, and the two sets of sub-coils are respectively supplied with opposite currents.

4. The actuator according to claim 3, characterized in that, The magnet of the first magnetic part includes two magnet units stacked together, the two magnet units having contact surfaces that are in contact with each other, and a non-magnetic region is formed at the contact surfaces; and the surfaces of the two magnet units that are opposite to the contact surfaces form unipolar surfaces, and the surfaces adjacent to the contact surfaces form bipolar surfaces.

5. The actuator according to claim 1, characterized in that, The connecting part, stator and mover are integrated into a spring-loaded structure.

6. The actuator according to claim 5, characterized in that, The spring structure has a gap in the flipping shaft portion, which is used to reduce the resistance to the flipping motion generated by the flipping shaft portion.

7. The actuator according to claim 5, characterized in that, The spring structure has notches on both sides of the torsion shaft, and the notches make the width of the torsion shaft smaller than the width of other areas of the connecting part.

8. The actuator according to claim 7, characterized in that, The shape of the connecting part can be any one of rectangle, square, trapezoid, rhombus, ellipse and circle.

9. The actuator according to claim 1, characterized in that, The connecting portion includes a first pivot unit and a second pivot unit, wherein the first pivot unit is axially disposed along the flipping shaft portion, and the second pivot unit is axially disposed along the torsion shaft portion; One end of the first pivot unit is connected to the stator, and one end of the second pivot unit is connected to the mover.

10. The actuator according to claim 1, characterized in that, The actuator also includes a substrate, which is fixedly connected to the stator.

11. A projection device, characterized in that, The projection device includes the actuator described in any one of claims 1 to 10.

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