Magnet assembly, optical element driving device, imaging device, and electronic device

Abstract

The utility model provides a kind of magnet assembly, optical element driving device, camera device and electronic equipment.The magnet assembly includes: magnet group, magnet group is formed by at least two magnetic strips combination;Limiting frame, limiting frame is at least two, limiting frame has limit slot, the both ends of magnet group are respectively correspondingly provided with at least one limiting frame, and the both ends of each magnetic strip are respectively located in the limit slot of two limiting frames.All magnetic strips are arranged along the length direction of limit slot.The utility model solves the problem of poor performance of the magnet group of optical element driving device in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of optical lens equipment, and more specifically, to a magnet assembly, an optical element driving device, a camera device, and an electronic device. Background Technology

[0002] Currently, mobile devices are becoming increasingly thinner. When cameras are integrated with other devices (such as mobile phones and tablets), the camera size needs to be as small as possible to fit into thinner mobile devices. However, with the increasing demands on camera devices, such as the increased load due to increased pixels, miniaturization requirements have led to insufficient thrust in voice coil motors. Currently, Helbeck array magnets are commonly used to improve the thrust of the voice coil motor drive components and alleviate this problem. Because the Helbeck array magnets repel each other, the magnet groups are assembled together with adhesive. However, when the voice coil motor is in a high-temperature and high-humidity environment, the adhesive softens, reducing its bonding strength. This causes the magnet groups to loosen and "break apart" due to magnetic repulsion, reducing structural reliability and affecting the driving performance of the voice coil motor.

[0003] Therefore, existing technologies suffer from poor performance of the magnet assembly in optical element driving devices. Utility Model Content

[0004] The main objective of this invention is to provide a magnet assembly, an optical element driving device, a camera device, and an electronic device to solve the problem of poor performance of the magnet assembly in the existing optical element driving device.

[0005] To achieve the above objectives, according to one aspect of the present invention, a magnet assembly is provided, comprising: a magnet group, the magnet group being formed by combining at least two magnetic strips; and a limiting frame, the limiting frame being at least two, the limiting frame having a limiting groove, at least one limiting frame being provided at each end of the magnet group, all the magnetic strips being arranged along the length direction of the limiting groove, and the two ends of each magnetic strip being located in the limiting grooves of the two limiting frames respectively.

[0006] Furthermore, the magnetization directions of any two adjacent magnetic strips are perpendicular to each other.

[0007] Furthermore, there are three magnetic strips, which are arranged along the length of the limiting groove and are respectively the first magnetic strip, the second magnetic strip and the third magnetic strip, and the magnetization directions of the first magnetic strip and the third magnetic strip are opposite.

[0008] Furthermore, the height of the first magnetic strip is the same as the height of the third magnetic strip; and / or the height of the second magnetic strip is less than the height of the first magnetic strip and / or the height of the third magnetic strip.

[0009] Furthermore, the magnetic strip includes a body portion and mounting portions located at both ends of the body portion, at least a portion of the mounting portions being located within a limiting groove, and the connection between the body portion and the mounting portion having a stepped surface for abutting against the limiting frame.

[0010] Furthermore, the cross-section of the limiting frame along the length of the limiting groove is U-shaped, and the limiting frame includes a first segment, a second segment, and a third segment connected in sequence.

[0011] Furthermore, at least the first of the three segments is made of non-magnetic material.

[0012] Furthermore, in the length direction of the limiting groove, the two ends of the first segment have clearance notches.

[0013] Furthermore, the limiting frame also includes two sealing baffles, which are respectively disposed at both ends of the limiting groove along its length.

[0014] According to another aspect of the present invention, an optical element driving device is provided, including the above-described magnet assembly.

[0015] Furthermore, the optical element driving device also includes: a stator assembly; a mover assembly; a driving coil; and two magnet assemblies and one driving coil, which correspond to each other. One of the magnet assembly and the driving coil is disposed on the circumferential outer wall of the mover assembly, and the other is disposed on the stator assembly. The first segment of the limiting frame of the magnet assembly is oriented towards the driving coil.

[0016] According to another aspect of the present invention, a camera device is provided, including the aforementioned optical element driving device.

[0017] According to another aspect of the present invention, an electronic device is provided, including the above-described camera device.

[0018] Applying the technical solution of this utility model, the magnet assembly in this application includes a magnet group and a limiting frame. The magnet group is formed by combining at least two magnetic strips; there are at least two limiting frames, each with a limiting groove. At least one limiting frame is provided at each end of the magnet group, and all the magnetic strips are arranged along the length direction of the limiting groove, with each magnetic strip's two ends located within the limiting grooves of two limiting frames respectively.

[0019] When using the magnet assembly of this application, since the magnet assembly has at least two limiting frames, after multiple magnetic strips of the magnet group are bonded together, the magnet group can be assembled with the two limiting frames, and the two ends of the magnet group can be installed into the limiting grooves of the corresponding limiting frames. At this time, since all the magnetic strips are arranged along the length direction of the limiting grooves, it can be ensured that the limiting grooves of the two limiting frames can limit the two ends of each magnetic strip respectively. This ensures that when the magnet group is exposed to a high-temperature environment and the glue between adjacent magnetic strips softens and fails, the limiting grooves can limit the adjacent magnetic strips, thereby preventing the magnetic strips of the magnet group from detaching from each other and ensuring the performance of the magnet assembly. Therefore, the magnet assembly of this application effectively solves the problem of poor performance of magnet groups in optical element driving devices in the prior art. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of a magnet assembly according to a specific embodiment of the present invention is shown;

[0022] Figure 2 It shows Figure 1 Exploded view of the magnet component in the image;

[0023] Figure 3 An exploded view of an optical element driving device according to a specific embodiment of this application is shown;

[0024] Figure 4 A schematic diagram of the structure of a magnet assembly according to another embodiment of this application is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Magnet assembly; 11. Magnetic strip; 111. First magnetic strip; 112. Second magnetic strip; 113. Third magnetic strip; 114. Body part; 115. Mounting part; 116. Stepped surface; 20. Limiting frame; 21. Limiting groove; 22. First section; 221. Clearance notch; 23. Second section; 24. Third section; 30. Stator assembly; 40. Mover assembly; 50. Drive coil. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] In order to solve the problem of poor performance of the magnet assembly 10 in the optical element driving device in the prior art, this application provides a magnet assembly, an optical element driving device, a camera device and an electronic device.

[0031] Furthermore, the magnet assembly in this application is primarily used in the optical element driving device of this application to drive the optical element carrier, namely the mover assembly 40 described below, within the optical element device. Of course, the magnet assembly in this application can also be applied to other devices requiring magnetic drive.

[0032] The electronic device in this application can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), camera, personal computer, laptop computer, in-vehicle equipment, wearable device, augmented reality (AR) glasses, AR headset, virtual reality (VR) glasses, or VR headset, or any other device with camera functionality. Furthermore, the camera device in this application has the optical element driving device described in this application, which can be a lens array or an image sensor (CMOS) driving device.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, the magnet assembly in this application includes a magnet group 10 and a limiting frame 20. The magnet group 10 is formed by combining at least two magnetic strips 11; there are at least two limiting frames 20, each limiting frame 20 having a limiting groove 21. At least one limiting frame 20 is provided at each end of the magnet group 10, and all the magnetic strips 11 are arranged along the length direction of the limiting groove 21, with each magnetic strip 11 having its two ends located within the limiting groove 21 of two limiting frames 20 respectively.

[0034] When using the magnet assembly of this application, since the magnet assembly has at least two limiting frames 20, after the multiple magnetic strips 11 of the magnet group 10 are bonded together, the magnet group 10 can be assembled with the two limiting frames 20, and the two ends of the magnet group 10 can be installed into the limiting grooves 21 of the corresponding limiting frames 20. At this time, since all the magnetic strips 11 are arranged along the length direction of the limiting grooves 21, it can be ensured that the limiting grooves 21 of the two limiting frames 20 can limit the two ends of each magnetic strip 11 respectively. This ensures that when the magnet group 10 is heated in a high-temperature environment and the glue between adjacent magnetic strips 11 softens and fails, the adjacent magnetic strips 11 can be limited by the limiting grooves 21, thereby preventing the magnetic strips 11 of the magnet group 10 from detaching from each other, thus ensuring the performance of the magnet assembly. Therefore, the magnet assembly of this application effectively solves the problem of poor performance of the magnet group in the optical element driving device in the prior art.

[0035] On the other hand, by setting two limiting frames 20 in this application to limit the magnetic strip 11 in the magnet assembly 10, not only can the limiting effect of the magnetic strip 11 be achieved, but it can also facilitate the assembly between the two limiting frames 20 and the magnet assembly 10, thereby improving production efficiency.

[0036] Specifically, the magnetization directions of any two adjacent magnetic strips 11 are perpendicular to each other. That is, in this application, the magnet group 10 composed of multiple magnetic strips 11 is a Hellbeck array magnet. Furthermore, in this application, the magnetization direction of each magnetic strip 11 can be adaptively adjusted; however, the limiting effect of the limiting groove 21 of the limiting frame 20 on the magnetic strips 11 of the magnet group 10 needs to be considered, therefore, the installation position of the limiting frame 20 needs to be adjusted simultaneously. Meanwhile, as... Figure 1 As shown in the figure, N and S represent the magnetic poles of the magnetic strip, and the N and S poles of the same magnetic strip are arranged opposite each other.

[0037] In one specific embodiment of this application, there are three magnetic strips 11, arranged along the length of the limiting groove 21, and designated as a first magnetic strip 111, a second magnetic strip 112, and a third magnetic strip 113, with the first magnetic strip 111 and the third magnetic strip 113 magnetized in opposite directions. That is, in this embodiment, the first magnetic strip 111 and the second magnetic strip 112, as well as the second magnetic strip 112 and the third magnetic strip 113, can be bonded together using adhesive. Of course, the specific number of magnetic strips 11 in this application can be adjusted adaptively according to actual usage.

[0038] Optionally, the height of the first magnetic strip 111 and the height of the third magnetic strip 113 are the same.

[0039] Optionally, the height of the second magnetic strip 112 is less than the height of the first magnetic strip 111 and / or the height of the third magnetic strip 113.

[0040] It should be noted that in this application, the length direction of the limiting groove 21 is perpendicular to both the length and thickness directions of the magnetic strip 11, while the length direction of the limiting groove 21 is parallel to the height direction of the magnetic strip 11. Of course, the positional relationship between the limiting groove 21 and the magnetic strip 11 can be adaptively adjusted according to actual usage, as long as the limiting frame 20 can limit the adjacent magnetic strip 11 through the limiting groove 21.

[0041] Preferably, the magnetic strip 11 includes a body portion 114 and mounting portions 115 located at both ends of the body portion 114. At least a portion of the mounting portions 115 is located within the limiting groove 21, and the connection between the body portion 114 and the mounting portions 115 has a stepped surface 116 for abutting against the limiting frame 20. That is, in this embodiment, the thickness of the mounting portion 115 is less than the thickness of the body portion 114, and both sides of the mounting portion 115 in the thickness direction have stepped surfaces 116 between them and the body portion 114. This arrangement ensures that after the magnet assembly 10 is assembled with the limiting frame 20, the outer wall of the limiting frame 20 will not protrude from the body portion 114, thereby ensuring that the overall shape of the assembled magnet assembly is more regular. At the same time, it can also reduce the internal space occupied by the magnet assembly in the optical element driving device, which is beneficial to improving the compactness of the internal structure of the optical element driving device and the miniaturization design of the optical element driving device.

[0042] In one specific embodiment of this application, the limiting frame 20 has a U-shaped cross-section along the length of the limiting groove 21, and the limiting frame 20 includes a first segment 22, a second segment 23, and a third segment 24 connected sequentially. Optionally, at least the first segment 22 is made of a non-magnetic material. Furthermore, in this application, the second segment 23 and the third segment 24 can be made of either a non-magnetic material or a magnetic material, respectively. When the magnet assembly in this application is applied to an optical element driving device, the first segment 22 of the limiting frame 20 can be positioned towards the driving coil 50 of the optical element driving device. Since the first segment 22 is made of a non-magnetic material, the shielding effect of the first segment 22 on the magnet assembly 10 can be effectively reduced, thereby ensuring the induction effect between the magnet assembly and the driving coil 50, and thus guaranteeing the performance of the optical element driving device. As for the second segment 23 and the third segment 24, when the second segment 23 and the third segment 24 are made of magnetic materials, the limiting frame 20 can ensure the anti-magnetic leakage effect of the magnet group 10 in directions other than towards the drive coil 50.

[0043] Preferably, such as Figure 4As shown, the first segment 22 has clearance notches 221 at both ends along the length of the limiting groove 21. This arrangement further improves the induction effect between the magnet assembly and the drive coil 50. Furthermore, this arrangement effectively reduces the overall weight of the magnet assembly, thereby enabling a miniaturized design of the optical element drive device.

[0044] Optionally, the limiting frame 20 also includes two sealing baffles, which are respectively disposed at both ends of the limiting groove 21 along its length. This arrangement not only further ensures the limiting effect of the limiting frame 20 on the magnetic strips 11, but also improves the anti-magnetic leakage performance of the limiting frame 20.

[0045] And, as Figure 3 As shown, the optical element driving device in this application also includes a stator assembly 30, a mover assembly 40, and a drive coil 50. There are two magnet assemblies and two drive coils 50, each corresponding to the other. One magnet assembly and one drive coil 50 are disposed on the circumferential outer wall of the mover assembly 40, and the other is disposed on the stator assembly 30. The first segment 22 of the limiting frame 20 of the magnet assembly faces the drive coil 50. That is, in this application, the positions of the drive coil 50 and the magnet assembly in the optical element driving device can be interchanged, but it is necessary to ensure that both magnet assemblies and both drive coils 50 are interchanged simultaneously. The purpose of setting the first segment 22 of the limiting frame 20 of the magnet assembly to face the drive coil 50 is that the first segment 22 is made of a non-magnetic material, thereby ensuring the induction effect between the drive coil 50 and the magnet assembly, and thus ensuring the performance of the optical element driving device.

[0046] and, Figure 3 In the embodiment shown, the mover assembly 40 is used to drive the lens group to move, that is, in Figure 3 In this embodiment, the mover assembly 40 is a lens support. Of course, in this application, the mover assembly 40 can also be used to drive the image sensor. That is, the optical element in this embodiment can be a lens group or an image sensor.

[0047] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0048] 1. Effectively solves the problem of poor performance of the magnet assembly in existing optical element driving devices;

[0049] 2. Simple structure and stable performance.

[0050] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic assembly, characterized in that, include: A magnet assembly (10), wherein the magnet assembly (10) is formed by combining at least two magnetic strips (11); The limiting frame (20) is at least two, and the limiting frame (20) has a limiting groove (21). At least one limiting frame (20) is provided at each end of the magnet group (10). All the magnetic strips (11) are arranged along the length direction of the limiting groove (21), and the two ends of each magnetic strip (11) are located in the limiting groove (21) of the two limiting frames (20).

2. The magnet assembly according to claim 1, characterized in that, The magnetization directions of any two adjacent magnetic strips (11) are perpendicular to each other.

3. The magnet assembly according to claim 2, characterized in that, There are three magnetic strips (11), which are arranged along the length of the limiting groove (21) and are respectively the first magnetic strip (111), the second magnetic strip (112) and the third magnetic strip (113), and the magnetization directions of the first magnetic strip (111) and the third magnetic strip (113) are opposite.

4. The magnet assembly according to claim 3, characterized in that, The height of the first magnetic strip (111) is the same as the height of the third magnetic strip (113); and / or The height of the second magnetic strip (112) is less than the height of the first magnetic strip (111) and / or the height of the third magnetic strip (113).

5. The magnet assembly according to claim 1, characterized in that, The magnetic strip (11) includes a body part (114) and mounting parts (115) located at both ends of the body part (114). At least a portion of the mounting parts (115) is located in the limiting groove (21), and the connection between the body part (114) and the mounting parts (115) has a stepped surface (116) for abutting against the limiting frame (20).

6. The magnet assembly according to any one of claims 1 to 5, characterized in that, The limiting frame (20) has a U-shaped cross section in the length direction of the limiting groove (21), and the limiting frame (20) includes a first segment (22), a second segment (23) and a third segment (24) connected in sequence.

7. The magnet assembly according to claim 6, characterized in that, Of the first segment (22), the second segment (23), and the third segment (24), at least the first segment (22) is made of a non-magnetic material.

8. The magnet assembly according to claim 6, characterized in that, Along the length of the limiting groove (21), the first segment (22) has clearance notches (221) at both ends.

9. The magnet assembly according to claim 6, characterized in that, The limiting frame (20) also includes two sealing baffles, which are respectively disposed at both ends of the limiting groove (21) in the length direction.

10. An optical element driving device, characterized in that, The magnetic component includes any one of claims 1 to 9.

11. The optical element driving device according to claim 10, characterized in that, The optical element driving device further includes: Stator assembly (30); The moving component (40); The drive coil (50) consists of two magnet components and two drive coils (50) that correspond to each other. One of the magnet components and the drive coil (50) is disposed on the circumferential outer wall of the mover assembly (40), and the other is disposed on the stator assembly (30). The first segment (22) of the limiting frame (20) of the magnet component is disposed facing the drive coil (50).

12. A camera device, characterized in that, Includes the optical element driving device as described in claim 10 or 11.

13. An electronic device, characterized in that, Includes the camera device as described in claim 12.

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