Gimbal structure and optical image stabilisation device

Abstract

The utility model provides a kind of head structure and optical image stabilizing device, the head structure includes two magnetic attraction seat and frame body.Frame body includes mainboard, two elastic arms and two magnetic parts.Two elastic arms are respectively arranged in the opposite sides of mainboard, and respectively extend to two magnetic attraction seat.Two magnetic parts are respectively connected to the two ends of two elastic arms away from mainboard, and are respectively magnetically attracted to two magnetic attraction seat.Each magnetic part is suitable for moving relative to corresponding magnetic attraction seat along at least one displacement direction, and is suitable for rotating relative to corresponding magnetic attraction seat.An optical image stabilizing device comprising head structure is also provided.The above-mentioned head structure has more activity freedom, and only needs a pair of magnetic parts, and can realize multi-axis movement in space, compared with the design using multiple pairs of rotation shaft structure, structure is simpler and occupies less space.

Description

Technical Field

[0001] This utility model relates to a gimbal structure and an optical image stabilization device, and more particularly to a gimbal structure capable of multi-axis rotation and an optical image stabilization device including the gimbal. Background Technology

[0002] In general imaging devices such as mobile phones and cameras, stabilizers such as optical image stabilization (OIS) are often installed to prevent image blurring caused by vibration or shaking during shooting. Optical image stabilization can sense changes in the device's angle and correspondingly move the lens module in the opposite direction to compensate for the shift in real time, thereby improving the stability of the captured image quality.

[0003] Common optical image stabilization devices consist of a gimbal and a base. Specifically, the lens module is fixed to the gimbal, which is assembled within the base and can rotate relative to it, thus achieving the effect of moving the lens module. However, a typical gimbal can only achieve single-axis rotation via a pair of pivot structures (e.g., a pair of ball bearings). To achieve multi-axis rotation (e.g., X, Y, and Z axes), multiple pairs of pivot structures are required, which makes the structure more complex and occupies more space. Utility Model Content

[0004] This utility model provides a gimbal structure that is simple in structure and can achieve multi-axis rotation.

[0005] This utility model discloses a gimbal structure comprising two magnetic bases and a frame. The frame includes a main board, two elastic arms, and two magnetic parts. The two elastic arms are respectively disposed on opposite sides of the main board and extend toward the two magnetic bases. The two magnetic parts are respectively connected to the two ends of the two elastic arms away from the main board and are magnetically attracted to the two magnetic bases. Each magnetic part is adapted to move relative to the corresponding magnetic base along at least one displacement direction and is adapted to rotate relative to the corresponding magnetic base. An optical image stabilization device including a gimbal structure is also provided.

[0006] In one embodiment of the present invention, the two magnetic parts described above are adapted to rotate about the line connecting the two magnetic parts as an axis of rotation.

[0007] In one embodiment of this invention, the at least one displacement direction mentioned above includes a first displacement direction. The frame is adapted to rotate about a rotation axis to move each magnetic part along the first displacement direction. The rotation axis is orthogonal to the line connecting two magnetic parts.

[0008] In one embodiment of the present invention, each of the two magnetic bases has an arc-shaped guide groove, and each magnetic part is adapted to move in the corresponding arc-shaped guide groove along the first displacement direction.

[0009] In one embodiment of the present invention, two stop walls are provided on opposite sides of the arc-shaped guide groove, and each magnetic part is confined between the two stop walls.

[0010] In one embodiment of this invention, the at least one displacement direction mentioned above further includes a second displacement direction. The main board has a central axis, and the frame is adapted to rotate about the central axis as a pivot, so that each magnetic part moves along the second displacement direction.

[0011] In one embodiment of the present invention, each of the two magnetic bases has a concave surface, and each magnetic part is adapted to move on the concave surface along a first displacement direction or a second displacement direction.

[0012] In one embodiment of the present invention, each of the two magnetic holders includes a holder body and a magnetic unit, wherein the magnetic unit is disposed on the side of the holder body facing away from the corresponding magnetic part.

[0013] In one embodiment of this utility model, the motherboard has an octagonal structure and an opening in the center.

[0014] This invention also provides an optical image stabilization device. The optical image stabilization device includes the aforementioned gimbal structure, housing, multiple coils, optical image assembly, and multiple magnets. The housing has multiple sidewalls. The gimbal structure is assembled inside the housing. Each magnetic holder is positioned between two adjacent sidewalls. Multiple coils are respectively disposed on the multiple sidewalls. The optical image assembly is fixed to the frame and has multiple sides. Multiple magnets are respectively disposed on the multiple sides and correspond to the multiple coils.

[0015] Based on the above, in the gimbal structure of this utility model, elastic arms are provided on both sides of the frame, and the ends of the elastic arms have magnetic parts. The frame can be attracted to the magnetic base through the magnetic parts. Since the magnetic parts and the magnetic bases are connected by magnetic attraction, the frame can be suspended between the two magnetic bases. It can not only move relative to the magnetic bases in at least one displacement direction, but the magnetic parts themselves can also rotate relative to the magnetic bases, giving the gimbal structure more freedom of movement. Therefore, the gimbal structure only needs one pair of magnetic parts to achieve complex multi-axis movements. Compared with the design using multiple pairs of rotating shafts, the structure is simpler and occupies less space.

[0016] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an optical image stabilization device according to an embodiment of the present invention;

[0018] Figure 2 yes Figure 1A cross-sectional view of the optical image stabilization device along the QQ section line;

[0019] Figure 3 yes Figure 1 A cross-sectional view of the optical image stabilization device along the PP section line;

[0020] Figure 4A yes Figure 1 A schematic diagram of the gimbal structure;

[0021] Figure 4B yes Figure 1 Exploded view of the components of the gimbal structure;

[0022] Figure 5 yes Figure 1 A top view schematic diagram of an optical image stabilization device;

[0023] Figure 6 yes Figure 4A A side view of the gimbal structure;

[0024] Figure 7 yes Figure 4B A schematic diagram of the magnetic base;

[0025] Figure 8 This is a schematic diagram of a magnetic base according to another embodiment of the present invention;

[0026] Figure 9 yes Figure 8 A schematic diagram of the gimbal structure in the embodiment shown.

[0027] Explanation of reference numerals in the attached figures

[0028] 100, 100a: Gimbal structure;

[0029] 110a, 110b, 110c, 110d: Magnetic base;

[0030] 112: base body;

[0031] 114: Magnetic unit;

[0032] 116: Arc-shaped guide groove;

[0033] 117: Stop wall;

[0034] 118: Concave surface;

[0035] 120: Frame;

[0036] 122: Motherboard;

[0037] 124a, 124b: Flexible arms;

[0038] 126a, 126b: Magnetic parts;

[0039] 200: Optical image stabilization device;

[0040] 205: Outer cover;

[0041] 210: Shell;

[0042] 212a, 212b, 212c, 212d: sidewalls;

[0043] 220a, 220b, 220c, 220d: Coils;

[0044] 230: Optical imaging components;

[0045] 232: Side view;

[0046] 240a, 240b, 240c, 240d: Magnets;

[0047] D1: First displacement direction;

[0048] D2: Second displacement direction;

[0049] L1: Connection;

[0050] L2: Rotation axis;

[0051] L3: Central axis;

[0052] O: Opening;

[0053] PP, QQ: cross-section;

[0054] S: Lower surface. Detailed Implementation

[0055] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element reference numerals are used in the drawings and description to denote the same or similar parts.

[0056] Figure 1 This is a schematic diagram of an optical image stabilization device according to an embodiment of the present invention. Figure 2 yes Figure 1 A cross-sectional view of the optical image stabilization device along the QQ section line. Figure 3 yes Figure 1 A cross-sectional view of the optical image stabilization device along the PP section. To clearly show the internal structure of the optical image stabilization device 200. Figure 1 The outer cover 205 is shown in dashed lines.

[0057] Please see Figures 1 to 3In this embodiment, the optical image stabilization device 200 is, for example, an optical image stabilization (OIS) device or a part thereof, which can be applied to camera devices such as mobile phones and cameras, but the application scope of the optical image stabilization device 200 is not limited thereto.

[0058] The optical image stabilization device 200 uses physical means to move the optical image components to counteract vibrations or shaking of the device during shooting, resulting in clear and stable image quality. The specific structure and technical effects of the optical image stabilization device 200 will be described in detail in subsequent paragraphs.

[0059] In this embodiment, the optical image stabilization device 200 includes an outer cover 205, a housing 210, an optical image assembly 230, and a gimbal structure 100. The outer cover 205 covers the housing 210. The housing 210 has multiple sidewalls (shown as four sidewalls 212a, 212b, 212c, 212d).

[0060] The gimbal structure 100 is assembled within the housing 210 and includes a frame 120 and two opposing magnetic mounts 110a and 110b. Magnetic mounts 110a and 110b are respectively positioned between two adjacent sidewalls 212a, 212b, 212c, and 212d. More specifically, magnetic mounts 110a and 110b can be positioned diagonally across the housing 210; for example, magnetic mount 110a may be located between adjacent sidewalls 212a and 212c, while magnetic mount 110b may be located between adjacent sidewalls 212b and 212d.

[0061] The optical image assembly 230, for example, is a lens module that performs image capturing functions, but the type of optical image assembly 230 is not limited thereto. The optical image assembly 230 is fixed to the frame 120 and has multiple sides 232 ( Figure 2 A portion of the optical imaging assembly 230 may protrude from the outer cover 205 through the housing 210 and the outer cover 205.

[0062] In addition, the optical image stabilization device 200 may include common components found in general optical image stabilization devices, such as Hall sensors, gyroscopes, optical sensors (e.g., photosensitive elements), and autofocus actuators. These components are existing technologies, and their detailed operation will not be described here.

[0063] The structure of the gimbal structure 100 will be further explained below. Figure 4A yes Figure 1 A schematic diagram of the gimbal structure. Figure 4B yes Figure 1 An exploded view of the gimbal structure's components. Please refer to the diagram below. Figures 3 to 4BIn this embodiment, the frame 120 of the gimbal structure 100 includes a main board 122, two elastic arms 124a and 124b, and two magnetic parts 126a and 126b.

[0064] For example, motherboard 122 Figure 4A The octagonal structure shown has an opening O in the center of the motherboard 122. The optical image assembly 230 is fixed to the lower surface S of the motherboard 122 of the frame 120, and a part of the optical image assembly 230 can protrude from the outer cover 205 through the opening O.

[0065] The flexible arms 124a and 124b of the frame 120 are flexible and are respectively located on opposite sides of the main board 122, extending toward the two magnetic seats 110a and 110b respectively.

[0066] The magnetic parts 126a and 126b are, for example, magnets or yokes, but the types of magnetic parts 126a and 126b are not limited thereto. The magnetic parts 126a and 126b are respectively connected to the ends of the two elastic arms 124a and 124b away from the main board 122. That is, the opposite ends of the elastic arms 124a (or elastic arms 124b) are respectively connected to the magnetic parts 126a (or magnetic parts 126b) and the main board 122.

[0067] Magnetic parts 126a and 126b can be magnetically attached to magnetic bases 110a and 110b, respectively. Specifically, each of the magnetic bases 110a and 110b includes a base body 112 and a magnetic unit 114. The two base bodies 112 are respectively fixed to the side wall 212a. Figure 1 Between ) and sidewall 212c, and sidewall 212b ( Figure 1 Between the base 110a and the side wall 212d. The magnetic unit 114 is, for example, a magnet, and is disposed on the side of the base 112 facing away from the corresponding magnetic part 126a or 126b. However, the type of magnetic unit 114 is not limited thereto, as long as it can generate a magnetic field. The magnetic parts 126a and 126b are magnetically attracted to the magnetic units 114 of the magnetic bases 110a and 110b, respectively, so that the frame 120 is attached to the magnetic bases 110a and 110b.

[0068] This design utilizes the magnetic attraction between the frame 120 and the magnetic bases 110a and 110b to suspend the frame 120 between them, thereby increasing the mobility of the frame 120. Therefore, only a pair of rotating shaft structures (one magnetic part and one magnetic base can together form one rotating shaft structure) are needed to achieve multi-axis rotation in space. The operation of this design will be further explained below.

[0069] Figure 5 yes Figure 1 A top view of the optical image stabilization device. Figure 6 yes Figure 4AA side view of the gimbal structure. Figure 7 yes Figure 4B A schematic diagram of the magnetic base. To clearly illustrate the internal structure of the optical image stabilization device 200, Figure 5 The outer cover 205 is hidden.

[0070] Please see Figures 5 to 7 In this embodiment, the optical image stabilization device 200 further includes multiple coils 220a, 220b, 220c, and 220d, and multiple magnets 240a, 240b, 240c, and 240d. The coils 220a, 220b, 220c, and 220d are respectively disposed on sidewalls 212a, 212b, 212c, and 212d. The magnets 240a, 240b, 240c, and 240d are respectively disposed on different sides 232 of the optical image assembly 230. Figure 2 ), and corresponding to multiple coils 220a, 220b, 220c, 220d.

[0071] In this embodiment, through the interaction between coils 220a, 220b, 220c, 220d and magnets 240a, 240b, 240c, 240d, the gimbal structure 100 can rotate along two axes in space to guide the movement of the optical image component 230 and achieve the effect of optical image stabilization.

[0072] Specifically, please refer to Figure 5 The two magnetic parts 126a and 126b of the gimbal structure 100 can rotate about the line L1 connecting the magnetic parts 126a and 126b as an axis. More specifically, when the optical image stabilization device 200 receives the first electrical signal, the coils 220a and 220d interact with the magnets 240a and 240d respectively, generating an upward (i.e., moving away) force. Figure 5 The magnetic force (in the direction of the paper) lifts magnets 240a and 240d.

[0073] Simultaneously, coils 220b and 220c interact with magnets 240b and 240c respectively, generating a downward (i.e., entering) effect. Figure 5 The magnetic force (in the direction of the paper) causes magnets 240b and 240c to sink. In this way, the optical image assembly 230 can be driven by magnets 240a, 240b, 240c, and 240d to offset relative to the housing 210, and the magnetic parts 126a and 126b can rotate relative to the magnetic bases 110a and 110b along the connecting line L1, so as to guide the optical image assembly 230 to move well.

[0074] Of course, the interaction between coils 220a and 220d and magnets 240a and 240d can also cause magnets 240a and 240d to sink, and the interaction between coils 220b and 220c and magnets 240b and 240c can also cause magnets 240b and 240c to rise. In this way, magnetic parts 126a and 126b can rotate in opposite directions relative to magnetic bases 110a and 110b along the connecting line L1, thereby guiding the reverse movement of the optical image assembly 230.

[0075] On the other hand, when the optical image stabilization device 200 receives the second electrical signal, the coils 220a and 220c interact with the magnets 240a and 240c respectively, generating an upward (i.e., moving away) effect. Figure 5 The magnetic force (direction of the paper) causes magnets 240a and 240c to rise. Simultaneously, coils 220b and 220d interact with magnets 240b and 240d respectively, generating a downward (i.e., entering) magnetic force. Figure 5 The magnetic force (in the direction of the paper) causes magnets 240b and 240d to sink.

[0076] In this way, the optical image assembly 230 can be shifted in another direction by being driven by 240a, 240b, 240c, and 240d. At this time, the frame 120 rotates about the rotation axis L2 orthogonal to the connecting line L1, causing the magnetic parts 126a and 126b to move along the axis of rotation L2. Figure 6 The first displacement direction D1 shown moves relative to the corresponding magnetic holders 110a and 110b to guide the optical image assembly 230 to move smoothly.

[0077] by Figure 6 For example, when the magnetic part 126a moves upward, the magnetic part 126b moves downward, and vice versa. The path along the first displacement direction D1 for the magnetic parts 126a and 126b can be an arc-shaped path with an optical center.

[0078] Furthermore, the interaction between coils 220a and 220c and magnets 240a and 240c can cause magnets 240a and 240c to sink, while the interaction between coils 220b and 220d and magnets 240b and 240d can lift magnets 240b and 240d. In this way, the frame 120 can rotate in the opposite direction about the rotation axis L2 to guide the reverse movement of the optical image assembly 230.

[0079] It is worth mentioning that each of the two magnetic holders 110a and 110b in this embodiment has an arc-shaped guide groove 116. Figure 7The magnetic parts 126a and 126b can move along the first displacement direction D1 within the corresponding arc-shaped guide groove 116. Two stop walls 117 are provided on opposite sides of the arc-shaped guide groove 116, so that the magnetic parts 126a and 126b are confined between the two stop walls 117.

[0080] Therefore, the arc-shaped guide groove 116 can guide the magnetic parts 126a and 126b to move smoothly, and the stop wall 117 can prevent the magnetic parts 126a and 126b from detaching from the arc-shaped guide groove 116, thereby preventing the optical image assembly 230 from deviating from the predetermined direction. In addition, since the elastic arms 124a and 124b are flexible, it can be ensured that the magnetic parts 126a and 126b remain attached to the arc-shaped guide groove 116 during movement, maintaining a stable trajectory.

[0081] In existing technologies, gimbals can only achieve single-axis rotation through a pair of rotating shafts. To achieve multi-axis rotation of the gimbal, multiple pairs of rotating shafts are required. However, this makes the structure more complex and occupies more space, which is not conducive to the space layout of small devices such as mobile phones.

[0082] In contrast, in this embodiment, the frame 120 of the gimbal structure 100 is suspended between two magnetic bases 110a and 110b. The magnetic parts 126a and 126b can not only move relative to the corresponding magnetic bases 110a and 110b along at least one displacement direction (e.g., the first displacement direction D1), but also rotate relative to the corresponding magnetic bases 110a and 110b. Therefore, this design only requires a pair of rotating shaft structures arranged along the same axis to guide the optical image assembly 230 to rotate on two axes (connecting line L1 and rotation axis L2). The structure is simple and does not occupy too much space, which helps to miniaturize the device.

[0083] Figure 8 This is a schematic diagram of a magnetic holder according to another embodiment of the present invention. Figure 9 yes Figure 8 A schematic diagram of the gimbal structure in the illustrated embodiment. Please refer to [link / reference]. Figure 8 and Figure 9 Compared to the aforementioned embodiments, the magnetic bases 110c and 110d of the gimbal structure 110a in this embodiment do not have arc-shaped guide grooves.

[0084] Specifically, each magnetic base in this embodiment ( Figure 8 The magnetic chuck 110c shown has a concave surface 118, the center of which is lower than the periphery of the concave surface 118.

[0085] In this embodiment, the magnetic parts 126a and 126b can move along the first displacement direction D1 on the concave surface 118 and can rotate about the connecting line L1 as the axis of rotation. The movement of the magnetic parts 126a and 126b along the first displacement direction D1 and the rotation about the connecting line L1 as the axis of rotation have been described in the foregoing embodiments and will not be repeated here.

[0086] Furthermore, the magnetic parts 126a and 126b in this embodiment can also move along the second displacement direction D2 on the concave surface 118. Specifically, the main board 122 has a central axis L3, which is orthogonal to the connecting line L1 and the rotation axis L2. The frame 120 can rotate about the central axis L3 by, for example, the magnetic force of the aforementioned magnet and coil, so that each magnetic part 126a and 126b moves along... Figure 9 The second displacement direction, D2, is shown.

[0087] In other words, the gimbal structure 100a of this embodiment only needs to set a pair of rotating shaft structures arranged along the same axis to realize the rotation of three axes in space (mutually orthogonal connecting line L1, rotation axis L2 and central axis L3), guide the optical image component 230 to move more flexibly, and does not need to use multiple pairs of rotating shaft structures, thus saving space inside the device.

[0088] Furthermore, the concave surfaces 118 of the magnetic bases 110c and 110d do not have guide grooves or stop walls, so the magnetic parts 126a and 126b can move smoothly on the concave surfaces 118 along the first displacement direction D1 or the second displacement direction D2 without being obstructed.

[0089] In summary, in the gimbal structure 100 of this utility model, the frame 120 has elastic arms 124a and 124b on both sides, and the ends of the elastic arms 124a and 124b have magnetic parts 126a and 126b, respectively. The frame 120 can be attracted to the magnetic bases 110a and 110b through the magnetic parts 126a and 126b. Since the magnetic parts 126a and 126b are magnetically attracted to the magnetic bases 110a and 110b, the frame 120 can be suspended between the two magnetic bases 110a and 110b.

[0090] In this way, the magnetic parts 126a and 126b can not only move relative to the magnetic bases 110a and 110b along at least one displacement direction D1, but also rotate relative to the magnetic bases 110a and 110b along the line L1 connecting the magnetic parts 126a and 126b, giving the gimbal structure 100 more freedom of movement. In other words, the gimbal structure 100 only needs a pair of magnetic parts 126a and 126b to achieve complex multi-axis movements. Compared with designs using multiple pairs of rotating shafts, the structure is simpler and occupies less space.

[0091] Furthermore, the frame 120 can rotate around the central axis L3, allowing each magnetic part 126a and 126b to move along the second displacement direction D2. This simple structure enables three-axis rotation in space, thereby guiding the optical image assembly 230 to move more freely.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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. Such 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 utility model.

Claims

1. A gimbal structure, characterized in that, include: Two magnetic bases; as well as The frame includes: Motherboard; Two elastic arms are respectively disposed on opposite sides of the motherboard and extend toward the two magnetic bases; and Two magnetic parts are respectively connected to the two ends of the two elastic arms away from the motherboard, and are magnetically attracted to the two magnetic bases respectively; Each of the magnetic parts is adapted to move relative to the corresponding magnetic base along at least one displacement direction, and is adapted to rotate relative to the corresponding magnetic base.

2. The gimbal structure according to claim 1, characterized in that, The two magnetic parts are adapted to rotate about the line connecting the two magnetic parts as an axis.

3. The gimbal structure according to claim 1, characterized in that, The at least one displacement direction includes a first displacement direction, and the frame is adapted to rotate about a rotation axis to move each of the magnetic parts along the first displacement direction, wherein the rotation axis is orthogonal to the line connecting the two magnetic parts.

4. The gimbal structure according to claim 3, characterized in that, Each of the two magnetic bases has an arc-shaped guide groove, and each of the magnetic parts is adapted to move within the corresponding arc-shaped guide groove along the first displacement direction.

5. The gimbal structure according to claim 4, characterized in that, Two stop walls are provided on opposite sides of the arc-shaped guide groove, and each of the magnetic parts is confined between the two stop walls.

6. The gimbal structure according to claim 3, characterized in that, The at least one displacement direction also includes a second displacement direction, the motherboard has a central axis, and the frame is adapted to rotate about the central axis so that each of the magnetic parts moves along the second displacement direction.

7. The gimbal structure according to claim 6, characterized in that, Each of the two magnetic holders has a concave surface, and each of the magnetic parts is adapted to move on the concave surface along the first displacement direction or the second displacement direction.

8. The gimbal structure according to claim 1, characterized in that, Each of the two magnetic holders includes a holder body and a magnetic unit, wherein the magnetic unit is disposed on the side of the holder body facing away from the corresponding magnetic part.

9. The gimbal structure according to claim 1, characterized in that, The motherboard has an octagonal structure and an opening in the center.

10. An optical image stabilization device, characterized in that, include: The gimbal structure as described in any one of claims 1 to 9; The housing has multiple sidewalls, wherein the gimbal structure is assembled inside the housing, and each of the magnetic mounting bases is disposed between two adjacent sidewalls. Multiple coils are respectively disposed on the multiple sidewalls; An optical imaging assembly, fixed to the frame, has multiple sides; as well as Multiple magnets are respectively disposed on the multiple sides and corresponding to the multiple coils.

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