Actuating device and projection equipment

Abstract

The utility model provides an actuating device and projection equipment, and relates to the technical field of optical equipment. The service life of the actuating device can be prolonged, and the reliability of the actuating device can be improved. The actuating device comprises a base, a support and a driving assembly. Wherein the support comprises a bearing part and a deformation part, at least one part of the deformation part has elasticity and can generate elastic deformation, the bearing part is arranged on the base through the deformation part, and the bearing part is used for arranging an optical element; at least two sets of driving assemblies are arranged between the base and the bearing part in the circumferential direction of the bearing part. The actuating device is used for driving the optical element to move.

Description

Technical Field

[0001] This application relates to the field of optical equipment technology, and more particularly to an actuation device and a projection device. Background Technology

[0002] Projection devices typically include a galvanometer. The high-frequency reciprocating motion of the galvanometer shifts the projected light beam, thereby improving the image resolution of the projected image. However, in related technologies, the structure driving the optical elements within the galvanometer is prone to failure, which can lead to the malfunction of the entire galvanometer. Utility Model Content

[0003] This application provides an actuation device and a projection device, which can improve the reliability of the actuation device.

[0004] On one hand, this application provides an actuation device, which includes a base, a support, and a drive assembly. The support includes a load-bearing portion and a deformation portion. At least a portion of the deformation portion is elastic and capable of elastic deformation. The load-bearing portion is disposed on the base via the deformation portion and is used to mount optical elements. At least two sets of drive assemblies are disposed between the base and the load-bearing portion along the circumferential direction of the load-bearing portion. Each set of drive assemblies includes a passive member and at least two power members. The at least two power members are disposed on one side of the base and the load-bearing portion, and the passive member is disposed on the other side. Under the drive of the corresponding passive member and at least two power members, the load-bearing portion can deflect relative to the base about at least one axis via the deformation portion.

[0005] The actuation device provided in this application, because the bracket includes a support portion and a deformation portion, facilitates the mounting of optical elements through the support portion and facilitates the movement of the support portion relative to the base through the deformation portion. Furthermore, at least two sets of drive components are provided between the base and the support portion, allowing forces to be applied to the support portion from at least two directions via these two sets of drive components, thereby enabling the support portion to move relative to the base around at least two axes. Simultaneously, each set of drive components includes at least two power members, which not only allows for the application of a greater driving force to the support portion via at least two power members and their corresponding passive members, but also allows for the application of driving force to the support portion via at least one other power member and its passive member even if one power member fails. This extends the service life of the actuation device and thus improves its reliability.

[0006] In some possible embodiments of this application, the power component includes a first magnetic component, the passive component includes a second magnetic component, and the first magnetic component and the second magnetic component are capable of generating an attractive or repulsive force.

[0007] In the above technical solution, since the power component includes a first magnetic component and the passive component includes a second magnetic component, by selecting the first magnetic component and the second magnetic component and controlling the magnetic force between the first magnetic component and the second magnetic component, an attractive or repulsive force can be generated between the first magnetic component and the second magnetic component. Thus, the attractive or repulsive force between the first magnetic component and the second magnetic component can be used as a driving force to drive the movement of the bearing part.

[0008] In one possible implementation of this application, at least two first magnetic elements in the same set of drive components are distributed circumferentially along the support portion.

[0009] The above technical solution, since at least two first magnetic elements in the same group of drive components are distributed along the circumference of the support portion, can utilize the length space of each side of the support portion and the area on the base corresponding to each side of the support portion to respectively set the second magnetic element and multiple first magnetic elements, which is beneficial to reduce the installation space required for the drive components in the radial direction of the support portion.

[0010] In one possible implementation of this application, the first magnetic element includes an electromagnetic element, and the second magnetic element includes a permanent magnet element.

[0011] In the above technical solution, since the first magnetic component includes an electromagnetic component and the second magnetic component includes a permanent magnet component, the electromagnetic component can generate magnetic fields of different magnitudes and directions by controlling the current applied to the electromagnetic component, thereby enabling the electromagnetic component to apply forces to the permanent magnet component in different directions.

[0012] In one possible implementation of this application, the electromagnetic component is embedded in the base, and the permanent magnet component is disposed on the side of the bearing portion facing the base.

[0013] The above technical solution, by embedding the electromagnetic component in the base and fixing the permanent magnet component on the support, facilitates the setting of the circuit for electrically connecting the electromagnetic component, and allows the permanent magnet component to move under the action of attractive or repulsive forces, while the electromagnetic component remains stationary, which helps to reduce the risk of damage to the electromagnetic component.

[0014] In one possible implementation of this application, at least two electromagnetic components in the same set of drive components apply magnetic forces to the permanent magnet in the same direction.

[0015] The above technical solution, since at least two electromagnetic components in the same group of drive components apply magnetic forces to the permanent magnet in the same direction, can apply magnetic forces to the permanent magnet in the same direction by multiple electromagnetic components, thereby enhancing the driving force generated by each group of drive components.

[0016] In one possible implementation of this application, at least two electromagnetic components in the same group of drive components are connected in series; or, the actuation device further includes a control circuit that is electrically connected to each electromagnetic component in the same group of drive components, and the control circuit is capable of transmitting electrical energy to each electromagnetic component in the same group of drive components at different times or at the same time.

[0017] The above technical solution, by connecting at least two electromagnetic components in the same group of drive components in series, or by having the control circuit transmit electrical energy to multiple electromagnetic components simultaneously, allows multiple electromagnetic components in the same group to synchronously generate magnetic fields, thereby enabling multiple electromagnetic components to synchronously generate magnetic force on the permanent magnet. Since the control circuit is configured to transmit electrical energy to each electromagnetic component in the same group of drive components at different times, the magnetic fields generated by multiple electromagnetic components can be superimposed by controlling the time difference and duration of the electrical energy transmission to each electromagnetic component (for example, applying 5ms of electrical energy to two electromagnetic components in the same group of drive components, but with a 1ms time difference, allows the two electromagnetic components to simultaneously generate magnetic fields for 3ms). This enhances the driving force generated by the same group of drive components. Furthermore, during the change of direction of the magnetic field generated by the electromagnetic components, the impact force on the bearing part when the direction of the driving force changes can be reduced (the magnetic force increases from small to large, then decreases from large to small, then changes direction again, and so on repeatedly), which helps reduce the vibration of the actuator.

[0018] In one possible implementation of this application, each set of drive components includes at least two passive components and at least two power components corresponding to each passive component.

[0019] The above technical solution, since each group of drive components includes at least two passive components and at least two power components corresponding to each passive component, can increase the driving force of the same group of drive components through the interaction force between multiple passive components and multiple power components. Furthermore, even if any passive component or any power component fails, the other passive components or power components can still work normally, thus enabling the actuation device to continuously perform its driving function, which is beneficial to improving the fault tolerance of the actuation device.

[0020] In one possible implementation of this application, at least two passive members in each set of drive components are distributed radially along the bearing portion.

[0021] The above technical solution, since at least two passive components in each group of drive components are distributed radially along the bearing portion, can utilize the space along the radial direction of the bearing portion or base to set multiple passive components, thereby enabling each passive component to have a consistent or nearly consistent distance with the corresponding power component, and can also reduce the installation space required for the drive components along the thickness direction of the actuation device.

[0022] In one possible implementation of this application, the actuation device includes four sets of drive components along the circumference of the support portion, wherein two sets of drive components are respectively disposed on opposite sides of the support portion along a first direction, and the other two sets of drive components are respectively disposed on the other opposite sides of the support portion along a second direction; the first direction and the second direction intersect.

[0023] The above technical solution, because every two of the four drive components are distributed in the same direction, allows the bearing part to produce a larger deflection angle through the cooperation of the two drive components distributed in the same direction. Furthermore, the two drive components distributed in the same direction apply driving force to the bearing part from opposite sides, making the movement of the bearing part more stable.

[0024] On the other hand, this application provides a projection device, which includes: an optical engine assembly, a lens assembly, an optical element, and an actuation device provided by any one of the above. The optical element is fixed to a support portion, and the actuation device is disposed between the optical engine assembly and the lens assembly.

[0025] The projection device provided in this application includes any of the aforementioned actuation devices, which can extend the service life of the actuation devices, thereby improving the reliability of the actuation devices and thus improving the reliability of the projection device. Attached Figure Description

[0026] Figure 1 A schematic diagram of the actuation device provided in this application;

[0027] Figure 2 An exploded view of the actuation device provided in this application;

[0028] Figure 3 Top view of a portion of the structure of the actuation device provided in this application Figure 1 ;

[0029] Figure 4 Top view of a portion of the structure of the actuation device provided in this application Figure 2 .

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Base; 11-First channel; 2-Bracket; 21-Bearing part; 22-Deformation part; 23-Second channel; 3-Drive assembly; 31-Power component; 32-Passive component; 4-Nut; 5-Screw; 6-Connector; 7-Optical element; 8-First deflection axis; 9-Second deflection axis; X-First direction; Y-Second direction. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0033] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0034] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0035] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0036] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0038] Projection equipment typically includes a galvanometer, which usually comprises an actuator and optical elements. The actuator drives the optical elements to reciprocate at high speed, altering the transmission path of the projected beam and thus improving the image resolution of the projected image. However, in related technologies, the components within the actuator that drive the optical elements are prone to damage and failure.

[0039] This application provides an actuation device that can improve the reliability of the actuation device. (Refer to...) Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the actuation device provided in this application. Figure 2 This is an exploded view of the actuation device provided in this application. Figure 3 Top view of a portion of the structure of the actuation device provided in this application Figure 1 .

[0040] The actuation device provided in this application embodiment includes: a base 1, a support 2, and a drive assembly 3. The support 2 includes a bearing portion 21 and a deformation portion 22. At least a portion of the deformation portion 22 is elastic and capable of elastic deformation. The bearing portion 21 is disposed on the base 1 via the deformation portion 22 and is used to mount the optical element 7. At least two sets of drive assemblies 3 are disposed between the base 1 and the bearing portion 21 along the circumferential direction of the bearing portion 21. Each set of drive assemblies 3 includes a passive member 32 and at least two power members 31. The at least two power members 31 are disposed on one of the base 1 and the bearing portion 21, and the passive member 32 is disposed on the other. Under the drive of the corresponding passive member 32 and at least two power members 31, the bearing portion 21 can deflect relative to the base 1 about at least one axis via the deformation portion 22.

[0041] In this embodiment, the base 1 is used to mount and support other parts in the actuation device. For example... Figure 2 As shown, the base 1 can be configured as a flat plate structure, with a first channel 11 positioned at the center of the base 1. The first channel 11 can be a through-hole, and its shape can be customized according to the shape of the optical element 7. For example, if the optical element 7 is a square sheet structure, the first channel 11 can be configured as a square through-hole, with the square through-hole being larger than the optical element 7. This allows a portion of the optical element 7 to be accommodated within the first channel 11, and allows the light beam to be transmitted through the first channel 11.

[0042] For example, a nut 4 can be provided on the base 1, and the position of the nut 4 corresponds to the position of the deformable part 22 on the bracket 2. The deformable part 22 can be fixed to the base 1 by a screw 5 that matches the nut 4, so that the bracket 2 can be mounted on the base 1.

[0043] In this embodiment, the bracket 2 is used to mount and support the optical element 7. Under the drive of the driving component 3, the bracket 2 can drive the optical element 7 to move. The bracket 2 can be configured as a thin sheet structure. For example, the bracket 2 can be made of a material such as stainless steel, which has both a certain strength and rigidity, as well as high toughness and a certain degree of elasticity.

[0044] For example, a support portion 21 can be provided on the bracket 2, such as... Figure 1 and Figure 2 As shown, the support portion 21 can be configured as an annular sheet structure. That is, a second channel 23 is present in the central region of the support portion 21. The second channel 23 can be a through hole, and its shape matches the shape of the optical element 7. For example, the second channel 23 can be a square channel, and its size can be smaller than that of the optical element 7. The edge of the optical element 7 can be fixedly connected to the edge of the support portion 21 near the second channel 23 by adhesive bonding, thereby mounting the optical element 7 onto the support portion 21.

[0045] In another example, a deformable portion 22 can be provided on the outer periphery of the support portion 21, for example, one deformable portion 22 can be provided at each of the four corners of the support portion 21. The deformable portion 22 can be formed by extending from the edge of the support portion 21, and can be configured to include a deformable segment and a fixed segment. The deformable segment can be a long strip-shaped sheet to give it good elastic deformation performance, and one end of the deformable segment is connected to the support portion 21. Two deformable segments can be provided in each deformable portion 22, and the ends of the two deformable segments away from the support portion 21 are both connected to the same fixed segment. Through holes can be provided in the fixed segment to allow screws 5 to pass through the through holes in the fixed segment, thereby fixing the fixed segment to the base 1 with screws 5.

[0046] Another example is that the required bracket 2 can be processed from a thin stainless steel sheet using methods such as stamping or laser cutting. Alternatively, materials such as plastic can be used, and the bracket 2 can be formed through injection molding. This application does not limit the material or processing method of the bracket 2.

[0047] In this embodiment, the drive assembly 3 is used to apply a driving force to the support portion 21 to drive the support portion 21 to move. For example, two sets of drive assemblies 3 can be arranged between the support portion 21 and the base 1 along the circumference of the support portion 21, and the two sets of drive assemblies 3 can be respectively arranged on different sides of the support portion 21. This allows the two sets of drive assemblies 3 to apply force to the support portion 21 from two directions, thereby causing the support portion 21 to reciprocate around two axes.

[0048] For example, such as Figure 3As shown, each set of drive components 3 can be configured to include a passive member 32 and at least two power members 31. For example, the passive member 32 can be located at the edge of the support portion 21 away from the first channel 11, or the passive member 32 can be located on the side of the support portion 21 facing the base 1, and at least two power members 31 can be located on the base 1, with each of the at least two power members 31 corresponding to the passive member 32. Alternatively, at least two power members 31 can be located at the edge of the support portion 21 away from the first channel 11, while the passive member 32 can be located on the base 1. In this way, a driving force can be applied to the support portion 21 by the force generated between the power members 31 and the passive member 32, and when the support portion 21 is subjected to the driving force, the support portion 21 can cause the deformable portion 22 to undergo elastic deformation, thereby allowing it to move relative to the base 1.

[0049] The actuation device provided in this application, because the bracket 2 includes a support portion 21 and a deformation portion 22, facilitates the mounting of the optical element 7 through the support portion 21 and facilitates the movement of the support portion 21 relative to the base 1 through the deformation portion 22. Furthermore, at least two sets of drive components 3 are provided between the base 1 and the support portion 21, allowing the support portion 21 to move relative to the base 1 around at least two axes by applying forces to the support portion 21 from at least two directions using the at least two sets of drive components 3. Simultaneously, each set of drive components 3 includes at least two power members 31, which not only allows for the application of a greater driving force to the support portion 21 by the at least two power members 31 and their corresponding passive members 32, but also allows for the application of driving force to the support portion 21 by at least the other power member 31 and passive member 32 even if one power member 31 fails, thereby extending the service life of the actuation device and improving its reliability.

[0050] In some possible embodiments of this application, the power element 31 includes a first magnetic element, the passive element 32 includes a second magnetic element, and the first magnetic element and the second magnetic element can generate an attractive or repulsive force.

[0051] In this embodiment, both the power component 31 and the passive component 32 can be magnetic components. For example, the power component 31 can be a first magnetic component, which can be an electromagnetic component. The electromagnetic component can be a structure including an electromagnetic coil, and when a voltage or current is applied to the electromagnetic component, it can generate a magnetic field. The passive component 32 can be a second magnetic component, which can be a permanent magnet, a magnetically conductive component, or an electromagnetic component. For example, the second magnetic component can be a magnet, a ferromagnetic component (a material that can be attracted by a magnet, such as an iron sheet, iron block, steel sheet, steel block, etc.), or an electromagnetic component.

[0052] In the above embodiments, since the power component 31 includes a first magnetic component and the passive component 32 includes a second magnetic component, by selecting the first magnetic component and the second magnetic component and controlling the magnetic force between the first magnetic component and the second magnetic component, an attractive force or a repulsive force can be generated between the first magnetic component and the second magnetic component. Thus, the attractive force or repulsive force between the first magnetic component and the second magnetic component can be used as a driving force to drive the bearing part 21 to move.

[0053] In some possible embodiments of this application, such as Figure 1 and Figure 3 As shown, at least two first magnetic elements in the same group of drive components 3 are distributed circumferentially along the support portion 21.

[0054] In this embodiment of the application, when setting the first magnetic element in the drive assembly 3, the distribution of multiple first magnetic elements in the same group of drive assemblies 3 can be selected according to the shape of the support part 21 and the base 1.

[0055] For example, the length of each first magnetic element can be shorter than the length of the second magnetic element. For instance, multiple first magnetic elements in the same group of drive components 3 can be distributed circumferentially along the support portion 21, that is, multiple first magnetic elements in the same group of drive components 3 can be arranged sequentially along the extension direction of the same side of the support portion 21. Furthermore, the length direction of the second magnetic element is the same as the direction in which the multiple first magnetic elements are arranged sequentially. This allows a portion of the second magnetic element to correspond to some first magnetic elements, and another portion of the second magnetic element to correspond to other first magnetic elements.

[0056] In the above embodiments, since at least two first magnetic elements in the same group of drive components 3 are distributed along the circumference of the support portion 21, the second magnetic element and multiple first magnetic elements can be respectively set using the length space of each side of the support portion 21 and the area on the base 1 corresponding to each side of the support portion 21, which is beneficial to reduce the installation space required for the drive component 3 in the radial direction of the support portion 21.

[0057] In some possible embodiments of this application, the first magnetic element includes an electromagnetic element, and the second magnetic element includes a permanent magnet element.

[0058] In this embodiment, the first magnetic component can be an electromagnetic component, which can be a structure including an electromagnetic coil or a structure including an electromagnetic coil and an iron core. When a current is applied to the electromagnetic coil, the electromagnetic coil can generate a magnetic field. For example, applying an alternating current to the electromagnetic coil can cause the electromagnetic component to generate a magnetic field with alternating magnetic poles. The second magnetic component can be a permanent magnet, which can be a samarium cobalt magnet, neodymium iron boron magnet, ferrite magnet, alnico magnet, or iron-chromium-cobalt magnet, etc.

[0059] For example, such as Figure 1As shown, the electromagnetic component can be embedded in the base 1. For example, the base 1 can be a circuit board, and the electromagnetic component can be embedded in the substrate of the circuit board. Connectors 6 and wires can be installed on the circuit board, and connectors 6 and the electromagnetic component can be electrically connected via wires.

[0060] In another example, the permanent magnet can be disposed on the side of the support portion 21 facing the base 1. For example, the permanent magnet can be glued to the side of the support portion 21 facing the base 1 so that the permanent magnet corresponds to at least two electromagnetic components.

[0061] In the above embodiments, since the first magnetic component includes an electromagnetic component and the second magnetic component includes a permanent magnet component, the electromagnetic component can generate magnetic fields of different magnitudes and directions by controlling the current applied to it. This allows the electromagnetic component to exert forces on the permanent magnet component in different directions. Furthermore, embedding the electromagnetic component in the base 1 and fixing the permanent magnet component to the support portion 21 facilitates the arrangement of the wiring connecting the electromagnetic component. It also allows the permanent magnet component to move under the influence of attractive or repulsive forces, while the electromagnetic component remains stationary, thus reducing the risk of damage to the electromagnetic component.

[0062] In some possible embodiments of this application, at least two electromagnetic elements in the same group of drive components 3 apply magnetic forces to the permanent magnet in the same direction.

[0063] In this embodiment of the application, when setting permanent magnets and multiple electromagnetic components in the same group of drive components 3, the direction of the magnetic force applied by each electromagnetic component to the permanent magnet can be the same.

[0064] For example, the permanent magnet can be positioned so that one side facing the multiple electromagnetic components is either the south pole or the north pole. Correspondingly, the electromagnetic coil in each electromagnetic component can be wound in the same direction relative to the permanent magnet. In this way, when a current in the same direction is applied to the multiple electromagnetic components, the magnetic field generated by each electromagnetic component is in the same direction, which allows the multiple electromagnetic components to exert an attractive or repulsive force on the permanent magnet.

[0065] In another example, the permanent magnet can be positioned so that one half faces south and the other half faces north. Correspondingly, the electromagnetic coils in the two electromagnetic components can be wound in different directions relative to the permanent magnet. In this way, when a current in the same direction is applied to the two electromagnetic components, the magnetic fields generated by the two electromagnetic components are in opposite directions, which can cause both electromagnetic components to exert an attractive or repulsive force on the permanent magnet.

[0066] In the above embodiments, since at least two electromagnetic components in the same group of drive components 3 apply magnetic forces to the permanent magnet in the same direction, multiple electromagnetic components can apply magnetic forces to the permanent magnet in the same direction, which is beneficial to enhance the driving force generated by each group of drive components 3.

[0067] In some possible embodiments of this application, at least two electromagnetic components in the same group of drive components 3 are connected in series; or, the actuation device further includes a control circuit, which is electrically connected to each electromagnetic component in the same group of drive components 3, and the control circuit is capable of transmitting electrical energy to each electromagnetic component in the same group of drive components 3 at different times or at the same time.

[0068] In this embodiment, multiple electromagnetic components in the same group of driving components 3 can be connected in series, that is, multiple electromagnetic coils in the same group of driving components 3 can be connected in series. In this way, current can be applied to multiple electromagnetic components simultaneously.

[0069] In this embodiment, a control circuit can be provided in the actuation device, for example, the control circuit can be provided on a circuit board serving as the base 1. The control circuit can be electrically connected to all electromagnetic components in the same group of drive assemblies 3.

[0070] For example, an electronic switch can be incorporated into the control circuit, which can automatically switch in time-sharing response to external signals. This allows the control circuit to apply current to multiple electromagnetic components within the same group of drive components 3 at different times.

[0071] Another example is that the control circuit can be configured to synchronously apply current to each of the electromagnetic components in the same group of drive components 3.

[0072] In the above embodiments, since at least two electromagnetic components in the same group of drive components 3 are connected in series, or the control circuit transmits electrical energy to multiple electromagnetic components at the same time, multiple electromagnetic components in the same group can synchronously generate magnetic fields, thereby enabling multiple electromagnetic components to synchronously generate magnetic force on the permanent magnet. Since the control circuit is configured to transmit electrical energy to each electromagnetic component in the same group of drive components 3 at different time periods, the magnetic fields generated by multiple electromagnetic components can be superimposed by controlling the time difference and duration of the electrical energy transmission to each electromagnetic component (for example, applying 5ms of electrical energy to two electromagnetic components in the same group of drive components 3, but applying electrical energy to the two electromagnetic components with a 1ms time difference, can enable the two electromagnetic components to generate magnetic fields simultaneously for 3ms). This is beneficial to enhance the driving force generated by the same group of drive components 3, and during the process of the magnetic field direction generated by the electromagnetic components changing, the impact force on the bearing part 21 when the driving force direction changes can be reduced (the magnetic force increases from small to large, then decreases from large to small, and then changes direction again, and repeats in a cycle), which is beneficial to reduce the vibration of the actuator.

[0073] In some possible embodiments of this application, reference is made to Figure 4 , Figure 4 Top view of a portion of the structure of the actuation device provided in this application Figure 2Each set of drive components 3 includes at least two passive components 32, and at least two power components 31 corresponding to each passive component 32.

[0074] In this embodiment, at least two power components 31 can be provided in each group of drive components 3, and at least two passive components 32 can be provided in each group of drive components 3. Each passive component 32 can correspond to multiple power components 31, so that each power component 31 and each passive component 32 can generate a force.

[0075] For example, two electromagnetic components and two permanent magnet components can be provided in each group of drive components 3. Each permanent magnet component corresponds to one of the two electromagnetic components. Alternatively, three, four, or five electromagnetic components or three, four, or five permanent magnet components can be provided in each group of drive components 3. Each permanent magnet component corresponds to any one of the electromagnetic components, so that when any one of the electromagnetic components generates a magnetic field, each permanent magnet component can be subjected to a magnetic force.

[0076] In the above embodiments, since each group of drive components 3 includes at least two passive members 32, and at least two power members 31 correspond to each passive member 32, the driving force of the same group of drive components 3 can be increased by the interaction force between multiple passive members 32 and multiple power members 31. Furthermore, even if any passive member 32 or any power member 31 fails, the other passive members 32 or power members 31 can still function normally, thus enabling the actuation device to continuously perform its driving function and improving the fault tolerance of the actuation device.

[0077] In some possible embodiments of this application, such as Figure 4 As shown, at least two passive members 32 in each group of drive components 3 are distributed radially along the support portion 21.

[0078] In this embodiment, the length of the passive member 32 can be greater than the length of the power member 31, and the width of the passive member 32 can be less than the width of the power member 31. This allows multiple power members 31 in the same group of drive components 3 to be arranged along the length direction of the power member 31, while multiple passive members 32 in the same group of drive components 3 are arranged along the width direction of the power member 31. In other words, multiple passive members 32 are arranged radially along the support member on the support portion 21.

[0079] For example, the length of the permanent magnet can be approximately twice the length of the electromagnetic component, while the width of the permanent magnet is less than half the width of the electromagnetic component. Alternatively, two electromagnetic components in the same set of drive assemblies 3 can be arranged circumferentially within the base 1, while two permanent magnet components in the same set of drive assemblies 3 can be arranged radially on the support portion 21.

[0080] In the above embodiments, since at least two passive members 32 in each group of drive components 3 are radially distributed along the support portion 21, multiple passive members 32 can be arranged in the space along the radial direction of the support portion 21 or the base 1. This allows each passive member 32 to have a consistent or nearly consistent distance from the corresponding power member 31, and also reduces the installation space required for the drive components 3 along the thickness direction of the actuation device.

[0081] In some possible embodiments of this application, such as Figure 1 , Figure 2 and Figure 3 As shown, the actuation device includes four sets of drive components 3 along the circumference of the support portion 21. Two sets of drive components 3 are respectively disposed on opposite sides of the support portion 21 along the first direction X, and the other two sets of drive components 3 are respectively disposed on the other opposite sides of the support portion 21 along the second direction Y. The first direction X and the second direction Y intersect.

[0082] In this embodiment of the application, four sets of drive components 3 can be provided in the actuation device to drive the bearing part 21 to generate reciprocating deflection motion around two deflection axes through the four sets of drive components 3.

[0083] For example, along the first direction X, that is, the length direction of the optical element 7, a set of driving components 3 can be respectively arranged on both opposite sides of the support portion 21. Along the second direction Y, that is, the width direction of the optical element 7, a set of driving components 3 can be respectively arranged on the other opposite sides of the support portion 21. Thus, along the circumference of the support portion 21, four sets of driving components 3 are respectively located on one side of the square optical element 7. The first direction X and the second direction Y can be two directions that are perpendicular or nearly perpendicular to each other. The first direction X and the second direction Y can also be two directions with other included angles.

[0084] Another example, such as Figure 1 As shown, two sets of drive components 3 distributed along the first direction X can be controlled so that one set of drive components 3 applies a thrust to the support portion 21, while the other set applies a pull to the support portion 21, thereby causing the support portion 21 to deflect around the first deflection axis 8. In this way, the two sets of drive components 3 distributed along the first direction X can be controlled to alternately apply thrust and pull to the support portion 21, thereby causing the support portion 21 to perform reciprocating deflection motion around the first deflection axis 8.

[0085] Another example, such as Figure 1As shown, two sets of drive components 3 distributed along the second direction Y can also be controlled so that one set of drive components 3 applies a thrust to the support portion 21, while the other set applies a pull to the support portion 21, thereby causing the support portion 21 to deflect around the second deflection axis 9. In this way, the two sets of drive components 3 distributed along the second direction Y can be controlled to alternately apply thrust and pull to the support portion 21, thereby causing the support portion 21 to perform reciprocating deflection motion around the second deflection axis 9.

[0086] In another example, by controlling the timing of the four sets of drive components 3 and the driving force applied to the support portion 21, two adjacent sets of drive components 3 can apply a pulling force to the support portion 21, while the other two adjacent sets of drive components 3 can apply a pushing force to the support portion 21, thereby causing the support portion 21 to deflect around the diagonal of the square support portion 21.

[0087] It should be noted that the control method of the four sets of drive components 3 can be selected according to the application scenario of the actuation device. In this embodiment, there are no restrictions on the control timing of the four sets of drive components 3 and the direction of the driving force applied to the bearing part 21.

[0088] In the above embodiment, since each pair of the four sets of drive components 3 is distributed along the same direction, the cooperation of the two sets of drive components 3 distributed along the same direction can cause the bearing portion 21 to produce a deflection motion with a larger deflection angle. Furthermore, the two sets of drive components 3 distributed along the same direction apply driving force to the bearing portion 21 from opposite sides, which can make the movement of the bearing portion 21 more stable.

[0089] In addition, this application also provides a projection device, which includes: an optical engine assembly, a lens assembly, an optical element 7, and an actuation device provided in any of the above embodiments. The optical element 7 is fixed to the support portion 21, and the actuation device is disposed between the optical engine assembly and the lens assembly.

[0090] In this embodiment, the optical engine assembly is used to generate projected light rays. For example, a light source and a display chip can be set in the optical engine assembly to convert electrical signals into light signals using the display chip to form projected light rays. The lens assembly is used to shape the projected light rays into a projection image of the desired size.

[0091] In this embodiment, the optical element 7 can be an optical lens, for example, a plane lens. The plane lens can be fixed to the carrier 21 in the actuation device by means of bonding, snap-fitting, threaded connection, etc.

[0092] For example, the actuation device is disposed between the optical engine assembly and the lens assembly, that is, the actuation device is positioned on the path of the projected light generated by the optical engine assembly to the lens assembly, so that the projected light is transmitted through the optical element 7. The actuation device can be controlled to drive the optical element 7 carried on the carrier 21 to reciprocate, so as to process the projected light. The processed projected light passes through the lens assembly to form a projected image projected onto the screen.

[0093] The projection device provided in this application includes the actuation device provided in any of the above embodiments. Therefore, the service life of the actuation device can be extended, which helps to improve the reliability of the actuation device, and thus improves the reliability of the projection device.

[0094] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. An actuation device, characterized by The application relates to an optical device, comprising: a base (1); a support (2) comprising a bearing part (21) and a deformation part (22), at least a part of the deformation part (22) having elasticity and being capable of elastic deformation, the bearing part (21) being arranged on the base (1) through the deformation part (22), and the bearing part (21) being used for arranging an optical element (7); a driving assembly (3) arranged between the base (1) and the bearing part (21) along the circumferential direction of the bearing part (21), each group of the driving assembly (3) comprising a passive element (32) and at least two power elements (31), the at least two power elements (31) being arranged on one of the base (1) and the bearing part (21), and the passive element (32) being arranged on the other one of the base (1) and the bearing part (21); under the driving of the corresponding passive element (32) and the at least two power elements (31), the bearing part (21) is capable of deflecting relative to the base (1) around at least one axis through the deformation part (22).

2. The actuation device of claim 1, wherein, The power element (31) comprises a first magnetic element, and the passive element (32) comprises a second magnetic element, and the first magnetic element and the second magnetic element are capable of generating attractive force or repulsive force.

3. The actuation device of claim 2, wherein, The at least two first magnetic elements in the same group of the driving assembly (3) are distributed along the circumferential direction of the bearing part (21).

4. The actuation device of claim 2, wherein, The first magnetic element comprises an electromagnetic element, and the second magnetic element comprises a permanent magnetic element.

5. The actuation device of claim 4, wherein, The electromagnetic element is embedded in the base (1), and the permanent magnetic element is arranged on the side of the bearing part (21) facing the base (1).

6. The actuation device of claim 4, wherein, The directions of the magnetic force applied by the at least two electromagnetic elements in the same group of the driving assembly (3) to the permanent magnetic element are the same.

7. The actuation device of claim 4, wherein, The at least two electromagnetic elements in the same group of the driving assembly (3) are connected in series. Alternatively, the actuating device further comprises a control circuit, the control circuit being electrically connected with each electromagnetic element in the same group of the driving assembly (3), and the control circuit is capable of transmitting electric energy to each electromagnetic element in the same group of the driving assembly (3) at different time periods or at the same time period.

8. The actuation device according to any one of claims 1 to 7, characterized in that Each group of the driving assembly (3) comprises at least two passive elements (32), and the at least two power elements (31) correspond to each passive element (32).

9. The actuation device of claim 8, wherein, The at least two passive elements (32) in each group of the driving assembly (3) are distributed along the radial direction of the bearing part (21).

10. The actuation device according to any one of claims 1 to 7, characterized in that Four groups of the driving assembly (3) are arranged along the circumferential direction of the bearing part (21), two groups of the driving assembly (3) are arranged on the opposite sides of the bearing part (21) in a first direction, and the other two groups of the driving assembly (3) are arranged on the other two opposite sides of the bearing part (21) in a second direction; and the first direction and the second direction intersect.

11. A projection apparatus, characterized by comprising: The application relates to an optical device, comprising: an optical engine assembly; a lens assembly; an optical element; The actuating device of any one of claims 1 to 10, wherein the optical element is fixed to the carrier portion, and the actuating device is disposed between the optical-mechanical assembly and the lens assembly.

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