Driving device and projection equipment

Abstract

The utility model provides a driving device and projection equipment, and relates to the technical field of optical equipment. The performance stability and reliability of the driving device can be improved. The driving device comprises a base body, a bearing piece, a driving assembly and a protection piece. Wherein the bearing piece comprises a fixing part and a bearing part, the fixing part is connected to the base body, and the bearing part is used for installing the optical element; the driving assembly is arranged between the base body and the bearing piece and used for driving the bearing part to move relative to the base body. In the arrangement direction of the bearing piece and the base body, the protection piece is installed on the side, away from the base body, of the bearing piece, and a gap is formed between the protection piece and the bearing piece. The driving device is used for the optical equipment.

Description

Technical Field

[0001] The present application relates to the technical field of optical equipment, and in particular to a driving device and a projection device. Background Art

[0002] The galvanometer plays an important role in projection equipment. The projection direction and angle of the projection light beam can be controlled and adjusted through the galvanometer, and high-precision and high-speed projection light beam adjustment can be achieved, thereby achieving high-definition and high-brightness projection effects.

[0003] The springs that carry the optical elements in the galvanometer have a great impact on the normal use and performance stability of the galvanometer. For example, when the current of the galvanometer is too large during startup, the springs may be deformed, resulting in damage to the entire galvanometer. Or, during the assembly of the galvanometer, if the springs collide, the spring structure may be damaged. Therefore, a galvanometer with a more reliable structure and more stable performance is needed. Utility Model Content

[0004] The present application provides a driving device and a projection device, which can improve the performance stability and reliability of the driving device.

[0005] On the one hand, the present application provides a driving device, which includes: a base, a carrier, a driving assembly and a protective member. The carrier includes a fixing portion and a bearing portion, the fixing portion is connected to the base, and the bearing portion is used to mount an optical element; the driving assembly is arranged between the base and the carrier, and is used to drive the bearing portion to move relative to the base; along the arrangement direction of the carrier and the base, the protective member is installed on the side of the carrier away from the base, and there is a gap between the protective member and the carrier.

[0006] The driving device provided by the present application, because a carrier is arranged on the base, the optical element can be carried and installed by the carrier. And a driving assembly is arranged between the carrier and the base, and the carrier can be driven to move relative to the base by the driving assembly, so that the optical element can be driven to move in a preset manner. At the same time, a protective member is arranged on the side of the carrier away from the base, and a gap is provided between the protective member and the carrier, so that not only the normal movement of the carrier is not affected, but also the protective member can be shielded on the side of the carrier away from the base, so that the protective member can be used to provide shielding and protection for the carrier, thereby reducing the risk of deformation or damage caused by collision of the carrier during the assembly of the galvanometer; the protective member can also be used to limit the movement amplitude of the carrier, which is conducive to reducing the problem of failure of the carrier due to excessive movement amplitude. Therefore, the driving device provided by the present application can provide better protection for the carrier, which is conducive to improving the performance stability and reliability of the driving device.

[0007] In one possible implementation of the present application, the protective member includes a protective portion and a connecting portion, the connecting portion is connected to the base, the protective portion is located on the side of the bearing portion away from the base, at least a portion of the protective portion has an orthographic projection on the bearing portion located on the bearing portion, and there is a gap between the protective portion and the bearing portion.

[0008] In the technical solution of the present application, since the protective member includes a connecting portion and a protective portion, it is convenient to install the protective member on the base through the connecting portion. Moreover, the positive projection of at least a part of the protective portion on the bearing member is located on the bearing portion, and the bearing portion can be shielded and protected by the protective portion, which is conducive to reducing the problem of the bearing portion being damaged by collision.

[0009] In a possible implementation of the present application, at least one connecting portion corresponds to at least one of the fixing portions, and the corresponding connecting portion and fixing portion are overlapped and connected to the same area on the base.

[0010] In the technical solution of the present application, since at least one connecting portion on the protective member is arranged to correspond to at least one of the fixing portions on the supporting member, the corresponding fixing portion and connecting portion can be superimposed and connected at the same position on the base. This can reduce the steps for assembling the protective member and the supporting member on the base, and can also reduce the number of fasteners used, which is conducive to simplifying the structure of the drive device.

[0011] In one possible implementation of the present application, the corresponding connecting portion and the fixing portion are fixed to the base by a fastener, and the connecting portion is superimposed on a side of the fixing portion away from the base so that the connecting portion is located between the head of the fastener and the fixing portion.

[0012] In the technical solution of the present application, since the corresponding connecting part and the fixing part are fixed to the base through the fastener, and the connecting part is located between the head of the fastener and the fixing part, it is not only convenient to fix the fixing part and the connecting part, but also in the process of screwing the fastener, the fastener will exert a rotational friction force on the connecting part, and the fixing part only bears the clamping force transmitted toward the base through the connecting part, which is beneficial to reduce the possibility of causing slight deformation of the carrier during the assembly process, thereby improving the assembly quality of the drive device and further improving the performance of the drive device.

[0013] In a possible implementation of the present application, the connecting portion is fixedly connected to a first area on the substrate, and the fixing portion is fixedly connected to a second area on the substrate, and the first area and the second area are non-overlapping areas on the substrate.

[0014] In the technical solution of the present application, since the connecting part and the fixing part are respectively connected to different areas on the base, it is helpful to reduce the interference between the protective part and the bearing part. In addition, when the protective part is hit, the impact force on the protective part will be directly transmitted to the base, but not to the bearing part, so that better protection can be provided to the bearing part.

[0015] In a possible implementation of the present application, the protective element includes at least two protective bodies, each of which includes a protective portion and a connecting portion, and the protective portions on at least two protective bodies are distributed around the arrangement direction of the carrier and the substrate.

[0016] In the technical solution of the present application, since the protective member is set as a split structure of at least two protective bodies, it is convenient to process the protective member and also convenient to adjust the structure of the protective body according to the structure of the carrier, so that the protective member formed by multiple protective bodies matches the carrier and meets the use requirements.

[0017] In a possible implementation of the present application, the protective part is an integral structure, and the connecting part is fixedly connected to the protective part. The protective part is an annular sheet structure, and the annular protective part has a third through hole.

[0018] In the technical solution of the present application, since the protective part is a sheet structure with an integrated structure and the connecting part is fixedly connected to the protective part, it is beneficial to improve the overall strength of the protective part, so that the protective part can provide better protection for the bearing part and reduce the space occupied by the protective part along the thickness direction of the driving device.

[0019] In a possible implementation of the present application, the gap between the protective member and the supporting member is 0.5 mm to 1.0 mm.

[0020] In the technical solution of the present application, since the gap between the protective member and the carrier is 0.5mm to 1.0mm, it can both satisfy the space required for the movement of the bearing part on the carrier and limit the bearing part from producing an expected range of movement, thereby reducing the risk of damage to the carrier.

[0021] In one possible implementation of the present application, the fixing portion includes a fixing section and an elastic section. The elastic section is extended from the edge of the bearing portion and can produce elastic deformation. The fixing section is connected to one end of the elastic section away from the bearing portion, and the fixing section is fixedly connected to the base.

[0022] In the technical solution of the present application, since the fixing part of the bearing member is configured to include an elastic section and a fixing section, it is convenient to connect the fixing part to the base through the fixing section. The elastic section can provide support to the bearing part, and the bearing part can also be moved through the elastic section.

[0023] In a possible implementation of the present application, the drive assembly includes an electromagnetic coil and a permanent magnet, one of the electromagnetic coil and the permanent magnet is disposed on the carrier, and the other is disposed on the base.

[0024] In the technical solution of the present application, since the driving component includes an electromagnetic coil and a permanent magnet, a magnetic force can be generated between the electromagnetic coil and the permanent magnet by passing an electric current through the electromagnetic coil, and the direction of the magnetic force between the electromagnetic coil and the permanent magnet can be changed by changing the direction of the current passed through the electromagnetic coil, so that a force can be applied to the bearing part in a preset manner, so that the bearing part drives the optical element to move in a preset movement manner.

[0025] On the other hand, the present application provides a projection device, which includes: an optical-mechanical assembly, a lens assembly, an optical element, and a driving device provided by any one of the above, wherein the optical element is fixed on the bearing part, and the driving device is arranged between the optical-mechanical assembly and the lens assembly.

[0026] The projection device provided in the present application includes any one of the above-mentioned driving devices, and therefore can provide better protection for the bearing parts in the driving device, which is beneficial to improving the performance stability and reliability of the driving device, thereby improving the performance stability of the projection device and maintaining a high quality of the projection picture formed by the projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of the driving device provided in this application;

[0028] Figure 2 An exploded schematic diagram of the drive device provided for this application;

[0029] Figure 3 A schematic side view of the driving device provided in the present application;

[0030] Figure 4 A schematic diagram of the structure of a bearing member in the driving device provided in the present application;

[0031] Figure 5 Schematic diagram of the structure of the protective member in the drive device provided in this application Figure 1 ;

[0032] Figure 6 Schematic diagram of the structure of the protective member in the drive device provided in this application Figure 2 ;

[0033] Figure 7 Schematic diagram of the structure of the protective member in the drive device provided in this application Figure 3 .

[0034] Description of reference numerals:

[0035] 1-base; 11-first area; 12-second area; 13-first through hole; 14-connector; 15-memory; 2-carrying member; 21-fixing portion; 211-elastic section; 212-fixing section; 22-carrying member; 23-second through hole; 3-driving assembly; 31-permanent magnet; 32-electromagnetic coil; 4-protective member; 41-protective portion; 42-connecting portion; 421-connecting section; 422-extension section; 43-protective body; 44-third through hole; 5-fastener; 6-first embedded nut; 7-second embedded nut; 8-optical element; A-arrangement direction; J-gap. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0037] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0038] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0039] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0040] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0041] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0042] The present application embodiment provides a driving device, referring to Figure 1 , Figure 2 and Figure 3 , Figure 1 shows a schematic structural diagram of the driving device provided by the present application, Figure 2 shows an exploded schematic diagram of the driving device provided by the present application, Figure 3 The schematic side view of the driving device provided by the present application is shown. The driving device includes: a base 1, a carrier 2, a driving assembly 3 and a protective member 4. The carrier 2 includes a fixing portion 21 and a bearing portion 22, the fixing portion 21 is connected to the base 1, and the bearing portion 22 is used to mount the optical element 8; the driving assembly 3 is arranged between the base 1 and the carrier 2, and is used to drive the bearing portion 22 to move relative to the base 1; along the arrangement direction A of the carrier 2 and the base 1, the protective member 4 is installed on the side of the carrier 2 away from the base 1, and there is a gap J between the protective member 4 and the carrier 2.

[0043] In the present application embodiment, Figure 1 As shown, the base 1 is used to carry and set other parts in the driving device, and the structural shape of the base 1 can be set according to the structure of other parts carried by the base 1. For example, the base 1 can be set as a flat plate structure.

[0044] For example, Figure 2 As shown, a first through hole 13 may be provided on the base 1, and the size and shape of the first through hole 13 may be set according to the size and shape of the optical element 8 carried and mounted by the driving device, so that light is transmitted to the optical element 8 through the first through hole 13. A second embedded nut 7 may also be provided on the base 1, and the base 1 may be fixed to an electronic device using the driving device by the second embedded nut 7 to fix the driving device.

[0045] In the present application, refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the bearing member in the driving device provided in this application. Figure 2 and Figure 4As shown, a fixing portion 21 and a carrying portion 22 may be provided on the carrier 2. For example, the shape of the carrying portion 22 may be provided according to the shape and size of the optical element 8, so as to facilitate the optical element 8 to be fixedly mounted on the carrying portion 22. The fixing portion 21 may be extended to form a fixed portion at the edge of the carrying portion 22, for example, at least two fixing portions 21 may be extended to form a fixed portion 21 at the edge of the carrying portion 22, so that the carrier 2 may be fixedly mounted on the base 1 through the fixing portions 21.

[0046] Exemplarily, the bearing portion 22 may be set as an annular structure, the contour of the annular bearing portion 22 is similar to the contour of the optical element 8, and the inner diameter of the annular bearing portion 22 is smaller than the outer diameter of the optical element 8. That is, the bearing member 2 has a second through hole 23, and the second through hole 23 is located on the bearing portion 22. In this way, the optical element 8 can be fixed to the edge of the second through hole 23 on the bearing portion 22 by bonding, clamping, etc.

[0047] In the embodiment of the present application, a driving assembly 3 may be provided on the carrier 2 and the base 1, a part of the driving assembly 3 may be fixed on the base 1, and another part of the driving assembly 3 may be fixed on the carrier 2, such as being fixed on the edge area of ​​the carrier portion 22 of the carrier 2. In this way, the carrier portion 22 may be driven to move relative to the base 1 by the force generated by the driving assembly 3, thereby driving the optical element 8 located on the carrier portion 22 to move relative to the base 1.

[0048] In the present application embodiment, Figure 1 and Figure 2 As shown, along the arrangement direction A of the carrier 2 and the substrate 1, a protective member 4 can be provided on the side of the carrier 2 away from the substrate 1, so as to shield the carrier 2 through the protective member 4. For example, the protective member 4 can cover at least a portion of the carrier 2, such as covering the carrier portion 22. Figure 3 As shown, along the arrangement direction A of the carrier 2 and the base 1, a gap J can be provided between the protective member 4 and the carrier portion 22 of the carrier 2. The gap J is larger than the movement amplitude of the carrier portion 22 during normal movement, that is, the required movement space is reserved for the carrier portion 22, thereby avoiding restriction of the normal movement of the carrier portion 22 by the protective member 4.

[0049] Exemplarily, the gap J between the protective member 4 and the carrier 2 can be set to 0.5 mm to 1.0 mm. That is, along the arrangement direction A of the carrier 2 and the substrate 1, there is a distance of 0.5 mm to 1.0 mm between the bearing portion 22 of the carrier 2 and the protective portion 41 of the protective member 4. For example, the gap J between the protective member 4 and the carrier 2 can be set according to the specific parameters and requirements of the projection device using the driving device provided in the embodiment of the present application, such as setting the gap J to 0.7 mm, 0.8 mm or 0.85 mm. The embodiment of the present application does not limit the specific value of the gap J between the protective member 4 and the carrier 2.

[0050] It should be noted that the gap J between the protective member 4 and the carrier 2 is measured by a micrometer or other measuring instrument when both the carrier 2 and the protective member 4 are in a stationary state and at room temperature (25°C, or close to 25°C). In this way, by limiting the size of the gap J between the protective member 4 and the carrier 22, the space required for the movement of the carrier 22 on the carrier 2 can be met, and the movement range of the carrier 22 beyond the expected range can be limited, thereby reducing the risk of damage to the carrier 2.

[0051] The driving device provided by the present application, since a carrier 2 is arranged on the base 1, the optical element 8 can be carried and installed by the carrier 2. And a driving assembly 3 is arranged between the carrier 2 and the base 1, and the carrier 2 can be driven to move relative to the base 1 by the driving assembly 3, so that the optical element 8 can be driven to move in a preset manner. At the same time, a protective member 4 is arranged on the side of the carrier 2 away from the base 1, and a gap J is provided between the protective member 4 and the carrier 2, so that not only the normal movement of the carrier 2 will not be affected, but also the protective member 4 can be blocked on the side of the carrier 2 away from the base 1, so that the protective member 4 can be used to provide shielding and protection for the carrier 2, thereby reducing the risk of deformation or damage caused by collision of the carrier 2 during the assembly of the galvanometer; the movement amplitude of the carrier 2 can also be limited by the protective member 4, which is conducive to reducing the problem of failure of the carrier 2 due to excessive movement amplitude. Therefore, the driving device provided by the present application can provide better protection for the carrier 2, which is conducive to improving the performance stability and reliability of the driving device.

[0052] In some possible embodiments of the present application, refer to Figure 5 , Figure 5 The structure diagram of the protective member in the drive device provided by the present application is shown Figure 1 The protective member 4 includes a protective portion 41 and a connecting portion 42, the connecting portion 42 is connected to the substrate 1, the protective portion 41 is located on a side of the bearing portion 22 away from the substrate 1, the orthographic projection of at least a portion of the protective portion 41 on the bearing member 2 is located on the bearing portion 22, and there is a gap J between the protective portion 41 and the bearing portion 22.

[0053] In the embodiment of the present application, the structure of the protective member 4 can be set according to the structural shape of the bearing portion 22. Figure 5 As shown, the protective member 4 may be a structure including a protective portion 41 and a connecting portion 42 , so that the protective member 4 is fixed to the base 1 through the connecting portion 42 , and the supporting member 2 is shielded and protected through the protective portion 41 .

[0054] Exemplarily, the shape of the protection portion 41 may be similar to the shape of the bearing portion 22 on the bearing member 2. For example, the protection portion 41 may be set as an annular sheet structure, and the annular protection portion 41 has a third through hole 44, so that light can be transmitted through the third through hole 44. The annular protection portion 41 may be slightly larger than the annular bearing portion 22, or be nearly consistent with the shape and size of the annular bearing portion 22.

[0055] In another example, a connection portion 42 may be formed by extending from the edge of the protective portion 41. For example, a connection portion 42 may be formed by extending from each of the four corners of the protective portion 41, or two connection portions 42 or the same number of connection portions 42 may be formed by extending from the protective portion 41. In this way, the connection portion 42 may be fixedly connected to the substrate 1 to fix the protective member 4 on the substrate 1, and at the same time, at least a portion of the protective portion 41 may be shielded on the side of the bearing portion 22 away from the substrate 1, that is, the orthographic projection of at least a portion of the protective portion 41 on the bearing member 2 is located on the bearing portion 22. The structure of the connection portion 42 may also be set so that there is a gap J of a certain distance between the protective portion 41 and the bearing portion 22.

[0056] In the above embodiment, since the protective member 4 includes the connecting portion 42 and the protective portion 41, it is convenient to install the protective member 4 on the base 1 through the connecting portion 42. In addition, the orthographic projection of at least a portion of the protective portion 41 on the bearing member 2 is located on the bearing portion 22, and the bearing portion 22 can be shielded and protected by the protective portion 41, which is conducive to reducing the problem of the bearing portion 22 being damaged by collision.

[0057] In some possible embodiments of the present application, Figure 1 and Figure 2 As shown, at least one connecting portion 42 corresponds to one of the fixing portions 21 , and the corresponding connecting portion 42 and the fixing portion 21 are overlapped and connected to the same area on the base body 1 .

[0058] In the embodiment of the present application, the carrier 2 and the protective member 4 can be connected at the same position on the base 1, that is, the fixing portion 21 on the carrier 2 and the connecting portion 42 on the protective member 4 are arranged correspondingly, and the corresponding fixing portion 21 and connecting portion 42 are connected together at the same point on the base 1.

[0059] For example, Figure 2As shown, four fixing parts 21 can be provided on the carrier 2, and correspondingly, four connecting parts 42 are also provided on the protective member 4, and the four connecting parts 42 correspond to the four fixing parts 21 one by one. Alternatively, a connecting part 42 on the protective member 4 is provided corresponding to a fixing part 21 on the carrier 2. In this way, the corresponding fixing parts 21 and connecting parts 42 can be overlapped, and the overlapping connecting parts 42 and fixing parts 21 can be fixed to the same area on the substrate 1 by fasteners 5 such as screws. Alternatively, the overlapping fixing parts 21 and connecting parts 42 can be fixed to the same area on the substrate 1 by bonding, riveting or other connection methods. The embodiment of the present application does not limit the specific fixed connection method of the connecting part 42 and the fixing part 21 on the substrate 1.

[0060] In the above embodiment, since at least one connecting portion 42 on the protective member 4 is arranged to correspond to at least one of the fixing portions 21 on the supporting member 2, the corresponding fixing portions 21 and connecting portions 42 can be overlapped and connected at the same position on the base 1. This can reduce the steps for assembling the protective member 4 and the supporting member 2 on the base 1, and can also reduce the number of fasteners 5 used, which is conducive to simplifying the structure of the driving device.

[0061] In some possible embodiments of the present application, Figure 1 and Figure 2 As shown, the corresponding connecting portion 42 and the fixing portion 21 are fixed to the base 1 by the fastener 5 , and the connecting portion 42 is overlapped on the side of the fixing portion 21 away from the base 1 , so that the connecting portion 42 is located between the head of the fastener 5 and the fixing portion 21 .

[0062] In the embodiment of the present application, the fastener 5 can be used to fix the corresponding connecting portion 42 and the fixing portion 21 on the base 1. For example, the first embedded nuts 6 corresponding to the number and position of the fixing portions 21 can be provided on the base 1, such as four first embedded nuts 6 are provided on the base 1, and through holes can be provided on both the connecting portion 42 and the fixing portion 21. In this way, the fastener 5 matching the first embedded nut 6 can be used, such as a screw to connect the corresponding fixing portion 21 and the connecting portion 42 to the same first embedded nut 6.

[0063] For example, during the assembly of the protective member 4 and the carrier 2, the fixing portion 21 can be brought closer to the base 1, and the connecting portion 42 can be overlapped on the fixing portion 21 on the side away from the base 1. In this way, the head of the screw can be brought into contact with the connecting portion 42, and the fixing portion 21 can be pressed and fixed on the base 1 through the connecting portion 42. Alternatively, washers can be provided respectively between the fixing portion 21 and the base 1, between the connecting portion 42 and the fixing portion 21, and between the connecting portion 42 and the screw.

[0064] In the above embodiment, since the corresponding connecting portion 42 and the fixing portion 21 are fixed to the base 1 by the fastener 5, and the connecting portion 42 is located between the head of the fastener 5 and the fixing portion 21, it is not only convenient to fix the fixing portion 21 and the connecting portion 42, but also in the process of screwing the fastener 5, the fastener 5 will apply a rotational friction force on the connecting portion 42, and the fixing portion 21 only bears the clamping force transmitted toward the base 1 through the connecting portion 42, which is beneficial to reduce the possibility of causing slight deformation of the carrier 2 during the assembly process, thereby improving the assembly quality of the drive device and further improving the performance of the drive device.

[0065] In some possible embodiments of the present application, refer to Figure 6 , Figure 6 The structure diagram of the protective member in the drive device provided by the present application is shown Figure 2 The connecting portion 42 is fixedly connected to the first area 11 on the substrate 1 , and the fixing portion 21 is fixedly connected to the second area 12 on the substrate 1 . The first area 11 and the second area 12 are non-overlapping areas on the substrate 1 .

[0066] In the present application embodiment, Figure 6 As shown, the connecting portion 42 on the protective member 4 and the fixing portion 21 on the carrier 2 may be arranged in a non-corresponding manner, that is, the connecting portion 42 and the fixing portion 21 may be arranged in an offset manner, so that the connecting portion 42 and the fixing portion 21 may be connected to different areas on the substrate 1 respectively.

[0067] For example, the bearing portion 22 of the bearing member 2 may be provided as a substantially rectangular annular structure, and a fixing portion 21 may be provided at each of the four corners of the bearing portion 22. Figure 6 As shown, the protection part 41 of the protection member 4 can also be set as a substantially rectangular annular structure, and a connecting part 42 is respectively provided on two opposite parts of the annular protection part 41. Figure 2 As shown, the four fixing parts 21 of the carrier 2 can be fixedly connected to the first area 11 on the substrate 1, and the two connecting parts 42 of the protective part 4 can be fixedly connected to the second area 12 on the substrate 1, respectively. The first area 11 and the second area 12 on the substrate 1 do not overlap, so that the fixing parts 21 and the connecting parts 42 can be fixed to different areas on the substrate 1, respectively.

[0068] In the above embodiment, since the connecting portion 42 and the fixing portion 21 are respectively connected to different areas on the base 1, it is helpful to reduce the interference between the protective member 4 and the bearing member 2. In addition, when the protective member 4 is hit, the impact force on the protective member 4 will be directly transmitted to the base 1 instead of the bearing member 2, thereby providing better protection for the bearing member 2.

[0069] In some possible embodiments of the present application, refer to Figure 7 , Figure 7 The structure diagram of the protective member in the drive device provided by the present application is shown Figure 3 The protective member 4 includes at least two protective bodies 43 , each of which includes a protective portion 41 and a connecting portion 42 , and the protective portions 41 on at least two protective bodies 43 are distributed around the arrangement direction A of the carrier 2 and the substrate 1 .

[0070] In the present application embodiment, Figure 7 As shown, the protective member 4 can be configured as a split structure including a plurality of protective bodies 43. For example, the protective member 4 can be configured as a split structure including four protective bodies 43, or the protective member 4 can be configured as a split structure including two protective bodies 43.

[0071] Exemplarily, a protective portion 41 and a connecting portion 42 may be provided on each protective body 43. For example, the connecting portion 42 is formed by extending from the edge of the protective portion 41, and the connecting portion 42 may be provided as a structure including an extension section 422 and a connecting section 421. The extension section 422 extends from the edge of the protective portion 41, and the connecting section 421 is connected to an end of the extension section 422 away from the protective portion 41. Along the arrangement direction A of the carrier 2 and the substrate 1, the two ends of the extension section 422 may be located in different planes, so that the connecting section 421 and the protective portion 41 may be located in different planes. In this way, after the connecting section 421 is fixedly connected to the substrate 1, a gap J of a certain distance may be provided between the protective portion 41 and the carrier 22 through the extension section 422. After the multiple protective bodies 43 are installed on the substrate 1, the protective parts 41 on the multiple protective bodies 43 are distributed around the arrangement direction A of the carrier 2 and the substrate 1, so that the multiple protective parts 41 can be arranged in a ring (a continuous ring or an intermittent ring) and block the side of the carrier 22 away from the substrate 1.

[0072] In the above embodiment, since the protective member 4 is set as a split structure of at least two protective bodies 43, it is convenient to process the protective member 4, and it is also convenient to adjust the structure of the protective body 43 according to the structure of the supporting member 2, so that the protective member 4 formed by multiple protective bodies 43 matches the supporting member 2 and meets the use requirements.

[0073] In some possible embodiments of the present application, Figure 5 and Figure 6 As shown, the protection part 41 of the protection member 4 is an integral structure, and the connecting part 42 is fixedly connected to the protection part 41 . The protection part 41 is an annular sheet structure, and a third through hole 44 is provided on the annular protection part 41 .

[0074] In the embodiment of the present application, the protective member 4 can be processed by an integrated molding method, or different parts of the protective member 4 can be fixedly connected as a whole to obtain a protective member 4 with an integral structure.

[0075] For example, the protective member 4 can be made of a metal plate, and the metal plate is stamped to obtain an integrally formed protective member 4. Alternatively, the protective portion 41 and the connecting portion 42 are processed independently, and then the protective portion 41 and the connecting portion 42 are fixedly connected into an integral structure by welding or the like.

[0076] In another example, the protective member 4 may be made of plastic, and the plastic may be processed by injection molding to obtain a protective member 4 with an integral structure.

[0077] Another example, such as Figure 5 As shown, the protection part 41 can be set as an annular sheet structure, so that a third through hole 44 can be formed on the protection part 41. The shape of the third through hole 44 can be set according to the shape of the optical element 8 installed on the driving device, such as setting the third through hole 44 to be a rectangular through hole.

[0078] In the above embodiment, since the protective part 41 is an integrated sheet structure and the connecting part 42 is fixedly connected to the protective part 41, it is beneficial to improve the overall strength of the protective member 4, so that the protective member 4 can provide better protection for the carrier 2 and can reduce the space occupied by the protective part 41 along the thickness direction of the driving device.

[0079] In some possible embodiments of the present application, Figure 4 As shown, the fixing portion 21 includes a fixing section 212 and an elastic section 211. The elastic section 211 is extended from the edge of the bearing portion 22 and can produce elastic deformation. The fixing section 212 is connected to one end of the elastic section 211 away from the bearing portion 22. The fixing section 212 is fixedly connected to the base 1.

[0080] In the present application embodiment, Figure 2 and Figure 4 As shown, the bearing member 2 can be configured as a sheet-like structure as a whole. For example, the bearing member 2 can be made of stainless steel, alloy, plastic, etc. A plurality of fixing portions 21 can be extended on the bearing portion 22.

[0081] Exemplarily, the elastic section 211 can be formed by extending from the edge of the bearing portion 22 away from the second through hole 23, and the elastic section 211 can be set to an approximately S-shaped curved structure. For example, two S-shaped curved sections are extended from the same position of the edge of the bearing portion 22, and then the ends of the two S-shaped curved sections away from the bearing portion 22 are connected to the same fixed section 212. In this way, the elastic section 211 can be easily elastically deformed, and the elastic section 211 can have sufficient supporting force. Among them, the fixed section 212 can be a sheet-like structure, and a through hole can be set on the sheet-like fixed section 212, so that the fixed section 212 can be fixedly connected to the base 1 through the through hole.

[0082] In the above embodiment, since the fixing portion 21 of the bearing member 2 is configured to include an elastic segment 211 and a fixing segment 212, it is convenient to connect the fixing portion 21 to the base 1 through the fixing segment 212. Furthermore, the elastic segment 211 can provide support to the bearing portion 22, and the bearing portion 22 can also be moved through the elastic segment 211.

[0083] In some possible embodiments of the present application, Figure 2 As shown, the driving assembly 3 includes an electromagnetic coil 32 and a permanent magnet 31 , one of the electromagnetic coil 32 and the permanent magnet 31 is arranged on the carrier 2 , and the other is arranged on the base 1 .

[0084] In the embodiment of the present application, the driving component 3 can be adopted in the magnetic coil and the permanent magnet 31 to drive the bearing part 22 to move relative to the base 1 through the magnetic force.

[0085] Exemplarily, the electromagnetic coil 32 can be wound with wires such as copper, aluminum and alloy. The permanent magnet 31 can be made of ferrite magnets, neodymium iron boron magnets and cobalt hard magnets. The electromagnetic coil 32 can be embedded in the substrate 1, or fixed on the surface of the substrate 1, and the permanent magnet 31 can be fixed on the edge of the bearing part 22 away from the second through hole 23. Alternatively, the electromagnetic coil 32 can be fixed on the edge of the bearing part 22 away from the second through hole 23, and the permanent magnet 31 can be fixed on the substrate 1, or embedded in the substrate 1.

[0086] Another example, such as Figure 1 and Figure 2 As shown, the base 1 may be a circuit board, and the substrate of the circuit board may be used as a basis for carrying and installing parts such as the carrier 2 and the protective member 4. A connector 14 may be provided on the circuit board so as to electrically connect the driving device to the main body of the electronic device using the driving device through the connector 14. A memory 15 may also be provided on the circuit board so as to store data and the like.

[0087] Another example, Figure 2 As shown, the electromagnetic coil 32 can be fixed on the circuit board. For example, a groove or through hole matching the electromagnetic coil 32 can be provided on the circuit board to accommodate a part of the electromagnetic coil 32 or the entire electromagnetic coil 32 in the groove or through hole. Correspondingly, the permanent magnet 31 can be fixed to the position corresponding to the electromagnetic coil 32 on the bearing part 22 by bonding, clamping, etc. Among them, four groups of drive components 3 can be arranged between the bearing part 2 and the base 1, and the four groups of drive components 3 are distributed along the circumferential direction of the bearing part 2.

[0088] In the above embodiment, since the driving component 3 includes the electromagnetic coil 32 and the permanent magnet 31, a current can be supplied to the electromagnetic coil 32 to generate a magnetic force between the electromagnetic coil 32 and the permanent magnet 31, and the direction of the current supplied to the electromagnetic coil 32 can be changed to change the direction of the magnetic force between the electromagnetic coil 32 and the permanent magnet 31, so that a force can be applied to the bearing part 22 in a preset manner, so that the bearing part 22 drives the optical element 8 to move in a preset movement manner.

[0089] In addition, the embodiment of the present application further provides a projection device, which includes: an optical-mechanical assembly, a lens assembly, an optical element 8, and a driving device provided by any of the above embodiments. The optical element 8 is fixed on the bearing portion 22, and the driving device is arranged between the optical-mechanical assembly and the lens assembly.

[0090] In the embodiment of the present application, the optical-mechanical assembly is used to generate projection light. The optical element 8 can be a flat lens, such as a flat glass made of B270 glass. The optical device is arranged between the optical-mechanical assembly and the lens assembly, that is, the optical device is arranged on the path of the projection light generated by the optical-mechanical assembly to the lens assembly, and the projection light is processed by the optical element 8 carried by the optical device. After the processing, the projection light passes through the lens assembly to form a projection picture projected on the screen, which is conducive to improving the resolution of the projection picture.

[0091] The projection device provided in the embodiment of the present application includes the driving device provided in any one of the above-mentioned embodiments. Therefore, it can provide better protection for the carrier 2 in the driving device, which is beneficial to improving the performance stability and reliability of the driving device, thereby improving the performance stability of the projection device and maintaining a high quality of the projection picture formed by the projection device.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A driving device, characterized in that: include: Matrix (1); A carrier (2), the carrier (2) comprising a fixing portion (21) and a bearing portion (22), the fixing portion (21) being connected to the base (1), and the bearing portion (22) being used for mounting an optical element (8); A driving assembly (3), the driving assembly (3) being arranged between the base (1) and the bearing member (2) and being used for driving the bearing member (22) to move relative to the base (1); A protective member (4) is installed on a side of the carrier (2) away from the base (1) along the arrangement direction of the carrier (2) and the base (1), and a gap is provided between the protective member (4) and the carrier (2).

2. The driving device according to claim 1, characterized in that: The protective member (4) comprises a protective portion (41) and a connecting portion (42), wherein the connecting portion (42) is connected to the base (1), the protective portion (41) is located on a side of the bearing portion (22) away from the base (1), an orthographic projection of at least a portion of the protective portion (41) on the bearing member (2) is located on the bearing portion (22), and a gap is provided between the protective portion (41) and the bearing portion (22).

3. The driving device according to claim 2, characterized in that: At least one of the connecting parts (42) corresponds to one of the fixing parts (21), and the corresponding connecting part (42) and the fixing part (21) are superimposed and connected to the same area on the base body (1).

4. The driving device according to claim 3, characterized in that: The corresponding connecting portion (42) and the fixing portion (21) are fixed to the base (1) via a fastener (5), and the connecting portion (42) is superimposed on a side of the fixing portion (21) away from the base (1), so that the connecting portion (42) is located between the head of the fastener (5) and the fixing portion (21).

5. The driving device according to claim 2, characterized in that: The connecting portion (42) is fixedly connected to a first area (11) on the substrate (1), and the fixing portion (21) is fixedly connected to a second area (12) on the substrate (1), wherein the first area (11) and the second area (12) are non-overlapping areas on the substrate (1).

6. The driving device according to any one of claims 2 to 5, characterized in that: The protective member (4) comprises at least two protective bodies (43), each of the protective bodies (43) comprises the protective portion (41) and the connecting portion (42), and the protective portions (41) on at least two of the protective bodies (43) are distributed around the arrangement direction of the carrier (2) and the base (1).

7. The driving device according to any one of claims 2 to 5, characterized in that: The protection part (41) is an integral structure, and the connecting part (42) is fixedly connected to the protection part (41). The protection part (41) is an annular sheet structure, and the annular protection part (41) has a third through hole (44).

8. The driving device according to any one of claims 1 to 5, characterized in that: The gap between the protective member (4) and the supporting member (2) is 0.5 mm to 1.0 mm.

9. The driving device according to any one of claims 1 to 5, characterized in that: The fixing portion (21) comprises a fixing section (212) and an elastic section (211); the elastic section (211) is formed by extending from the edge of the bearing portion (22) and is capable of generating elastic deformation; the fixing section (212) is connected to an end of the elastic section (211) away from the bearing portion (22); and the fixing section (212) is fixedly connected to the base (1).

10. The driving device according to any one of claims 1 to 5, characterized in that: The driving component (3) comprises an electromagnetic coil (32) and a permanent magnet (31); one of the electromagnetic coil (32) and the permanent magnet (31) is arranged on the carrier (2), and the other is arranged on the base (1).

11. A projection device, characterized in that: include: An optical-mechanical assembly, a lens assembly, an optical element (8), and a driving device as claimed in any one of claims 1 to 10; Wherein, the optical element (8) is fixed on the bearing portion (22), and the driving device is arranged between the optical-mechanical assembly and the lens assembly.

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