Driving device, camera module and electronic equipment

Abstract

The utility model relates to a kind of driving device, camera module and electronic equipment, including base, and the carrier is linearly moved in first axis under the drive of drive assembly relative to the base, elastic buffer portion is equipped on the base and / or the carrier and is distributed and forms the elastic buffer portion to the movement limit of the carrier, the elastic buffer portion has when the carrier motion can with the base or the carrier point contact outer convex contact part.Advantages are that: design uses the elastic buffer portion with arc limit convex surface to be point contact in the instantaneous impact of carrier and base, then transition from point contact to face contact, greatly reduce the abnormal sound and impact peak of impact instant, effectively protect carrier and relevant precision components.

Description

Technical Field

[0001] This utility model belongs to the field of digital photography components, and in particular relates to a driving device, a camera module and an electronic device. Background Technology

[0002] In existing technologies, the buffer device between the carrier and the base during focusing in periscope or lens driving devices all adopts surface contact buffering. Due to the large instantaneous contact area, the impact noise is relatively large. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a driving device, camera module, and electronic device that can solve the aforementioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A driving device includes a base and a carrier that moves linearly relative to the base along a first axis under the drive of a driving assembly. The base and / or the carrier are provided with elastic buffer portions that are distributed and form a limit on the movement of the carrier. The elastic buffer portions have outwardly protruding contact portions that can make point contact with the base or the carrier when the carrier moves.

[0006] Furthermore, the elastic buffer portion includes at least one convex contact portion, and the outer surface of each convex contact portion is an arc-shaped limiting convex surface.

[0007] Furthermore, each of the convex contact portions has a pressure-reducing cavity inside.

[0008] Furthermore, the decompression cavity is connected to the outside.

[0009] Furthermore, the elastic buffer portion has a plurality of spaced arc-shaped limiting convex surfaces distributed in a plane perpendicular to the first axis.

[0010] Furthermore, the elastic buffer portion is provided on either the carrier or the base, and a limiting impact surface is provided on the other.

[0011] Furthermore, the carrier or the base is fixed to the elastic buffer portion by a concave-convex connection structure, at least a portion of which is provided on the carrier or the base, and the remaining portion is provided on the elastic buffer portion.

[0012] Furthermore, at least a portion and the remainder of the concave-convex connection structure are fixed by an adhesive layer.

[0013] As an application solution, this application also provides a camera module, which includes the aforementioned driving device.

[0014] As an application solution, this application also provides an electronic device, which includes the aforementioned camera module.

[0015] Compared with existing technologies, the advantages of this application are: the design adopts an elastic buffer part with an arc-shaped limiting convex surface, which makes point contact at the moment of impact between the carrier and the base, and then transitions from point contact to surface contact, which greatly reduces the abnormal noise and impact peak at the moment of impact, and effectively protects the carrier and related precision components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lens driving device assembly in Embodiment 1;

[0017] Figure 2 This is a top view of the lens driving device assembly in Embodiment 1;

[0018] Figure 3 This is an exploded schematic diagram of the carrier and its main components in Example 1;

[0019] Figure 4 Figure 1 shows a schematic diagram of the main assembly of the elastic buffer section in Embodiment 1;

[0020] Figure 5 Figure 2 shows the assembly diagram of the main body of the elastic buffer section in Embodiment 1;

[0021] Figure 6 Figure 1 shows a schematic cross-sectional view of the main assembly of the elastic buffer section in Embodiment 1;

[0022] Figure 7 Figure 2 shows a schematic cross-sectional view of the main assembly of the elastic buffer section in Embodiment 1;

[0023] Figure 8 This is a schematic diagram of the lens driving device assembly in Embodiment 2;

[0024] Figure 9 This is a schematic diagram of the explosion of the carrier and its main components in Example 2;

[0025] Figure 10 Figure 1 shows the assembly diagram of the main body of the elastic buffer section in Embodiment 2;

[0026] Figure 11 Figure 2 shows the assembly diagram of the main body of the elastic buffer section in Embodiment 2;

[0027] Figure 12 This is a schematic cross-sectional view of the main body assembly of the elastic buffer section in Embodiment 2;

[0028] Figure 13 This is a schematic diagram of the force applied to the elastic buffer section in Example 2;

[0029] Figure 14This is a schematic diagram illustrating an example of an electronic device in Embodiment 4.

[0030] In the figure, there is a base 1, a carrier 2, an elastic buffer part 4, an outwardly protruding contact part 40, an arc-shaped limiting convex surface 41, a pressure-reducing cavity 42, an elastic limiting arm 43, a contact surface 430, a limiting impact surface 5, a concave-convex connection structure 6, a pressure-reducing angle a, a plane xY, a first axis Z, an impact force F, a first component force F1, and a second component force F2. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning. Example 1

[0035] like Figures 1-2As shown, the driving device includes a base 1 for supporting components and a carrier 2 that moves linearly relative to the base 1 along a first axis Z under the drive of the driving assembly. The carrier 2 is used to mount optical elements, such as lenses and image sensors. In this embodiment, the first axis Z is the incident optical axis. When the carrier 2 moves along the first axis Z, it will collide with the base 1 at the point of maximum forward and backward travel. Therefore, at least two elastic buffer portions 4 are provided on the base 1 and / or the carrier 2, distributed along the first axis Z and forming a limiting force on the movement of the carrier 2. The elastic buffer portion 4 is provided on either the carrier 2 or the base 1, and a limiting impact surface 5 is provided on the other. In this embodiment, the elastic buffer portion 4 is provided on the carrier 2, and the limiting impact surface 5 is provided on the base 1. Specifically, a plurality of arc-shaped limiting convex surfaces 41 distributed at intervals are provided on a plane xY perpendicular to the first axis Z. The elastic buffer portion 4 has an arc-shaped limiting convex surface 41 that can contact the base 1 or the carrier 2 when the carrier 2 moves.

[0036] The carrier 2 or base 1 is fixed to the elastic buffer part 4 by a concave-convex connection structure 6. At least a part of the concave-convex connection structure 6 is provided on the carrier 2 or base 1, and the remaining part is provided on the elastic buffer part 4. Specifically, a part of the concave-convex connection structure 6 (e.g., a protrusion or a groove) is provided on the carrier 2 or base 1, while another part (e.g., a groove or a protrusion) that complements it is provided on the body of the elastic buffer part 4. An adhesive layer is also filled between the concave-convex mating parts for auxiliary bonding and fixing.

[0037] like Figure 4 As shown, the elastic buffer portion 4 includes at least one convex contact portion 40. The outer surface of each convex contact portion 40 is an arc-shaped limiting convex surface 41. The convex contact portion 40 can be any one or a combination of two of the following: a spherical contact portion and a conical contact portion. In this embodiment, only the convex contact portion 40 of a sphere is used as an example. Figures 2-3 As shown, when the carrier 2 moves to its travel limit, the arc-shaped convex surface of the spherical convex contact part 40 first makes instantaneous point contact with the limiting impact surface 5 on the base 1; under the action of impact load, the convex contact part 40 then undergoes elastic deformation, and the contact area rapidly expands from a point to a local bearing surface, realizing the dynamic transformation from point contact to surface contact, effectively absorbing impact energy and reducing collision noise, thereby reliably protecting the structural integrity of the drive device and the internal precision components from damage.

[0038] Specifically, regarding the aforementioned protruding contact portion 40, each protruding contact portion 40 has a pressure-reducing cavity 42 inside, and as shown... Figures 5-7As shown, the decompression cavity 42 is connected to the outside. When the carrier 2 moves to its stroke limit, the spherical arc-shaped convex surface of the outwardly protruding contact part 40 collides with the limiting impact surface 5 of the base 1 and is deformed under pressure, the volume of the decompression cavity 42 inside it decreases accordingly. Since the decompression cavity 42 is connected to the outside rather than forming a completely sealed high-pressure air cushion, it effectively absorbs some of the impact energy and significantly reduces the pressure borne by the outwardly protruding contact part 40 during compression deformation, preventing the outwardly protruding contact part 40 from being unable to release pressure and causing the carrier 2 to rebound during its stroke. Example 2

[0039] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, in relation to the driving device of Embodiment 1, this embodiment describes another driving device.

[0040] like Figures 8-9 As shown, in this embodiment, the driving device includes a base 1 for supporting the main components, and a carrier 2 that moves linearly relative to the base 1 along a first axis Z under the drive of the driving assembly. In this embodiment, the first axis Z is the incident optical axis. When the carrier 2 moves along the first axis Z, it will collide with the base 1 at the point of maximum forward and backward travel. Therefore, at least two elastic buffer portions 4 are provided on the base 1 or the carrier 2, distributed along the first axis Z and forming a limiting force on the movement of the carrier 2. The elastic buffer portion 4 is provided on either the carrier 2 or the base 1, and a limiting impact surface 5 is provided on the other. In this embodiment, the elastic buffer portion 4 is provided on the carrier 2, and the limiting impact surface 5 is provided on the base 1. Specifically, the elastic buffer portion 4 has an elastic limiting arm 43 that can contact the base 1 or the carrier 2 when the carrier 2 moves. At least a portion of the elastic limiting arm 43 forms an acute-angled pressure relief angle α with the elastic buffer portion 4, and the cantilever end of the elastic limiting arm 43 has a contact surface 430 that is relatively perpendicular to the first axis Z.

[0041] The purpose of this pressure relief angle α is that when the carrier 2 moves to its maximum stroke, the contact surface 430 at the end of the elastic limiting arm 43 first contacts the limiting impact surface 5 on the base 1 and begins to deform under pressure. In the initial stage of contact and compression, because the pressure relief angle α is acute, the impact force F acting on the elastic limiting arm 43 can be decomposed into two main components (such as...). Figure 13 (as shown)

[0042] The first component force F1 perpendicular to the direction of the limiting arm: This component force causes the elastic limiting arm 43 to produce elastic bending deformation toward the inside of the decompression angle a, thereby effectively absorbing and storing most of the impact kinetic energy and converting it into elastic potential energy.

[0043] The second component force F2 along the direction of the limiting arm (pointing to the root of the elastic buffer 4): This component force is relatively small and is mainly transmitted to the connection between the elastic limiting arm 43 and the main body of the elastic buffer 4.

[0044] Through this force decomposition mechanism, the decompression angle α significantly reduces the peak impact stress directly transmitted to the connection root between the elastic limiting arm 43 and the elastic buffer part 4, as well as to the carrier 2 itself. The bending deformation of the elastic limiting arm 43 provides a buffer stroke, prolongs the impact force's duration (i.e., reduces impact acceleration), and utilizes its elastic properties to gradually dissipate impact energy. This effectively reduces structural damage, noise, and vibration that may occur when the carrier 2 and base 1 collide hard, and also protects the impact-sensitive optical components mounted on the carrier 2, ensuring the reliability and stability of the drive device operating at extreme positions. Simultaneously, the elastic limiting arm 43 can return to its original shape after the impact force disappears, achieving a repeated buffering function.

[0045] A plurality of spaced elastic limiting arms 43 are provided on the same elastic buffer part 4, and at least some of the elastic limiting arms 43 are distributed in a first inclined direction, while the remaining elastic limiting arms 43 are distributed in a second inclined direction. In this embodiment, the first and second inclined directions are symmetrical about the central axis. When the carrier 2 impacts the limiting impact surface 5, the multiple spaced elastic limiting arms 43 can share the impact energy. Compared with a single limiting arm, this significantly reduces the peak stress borne by each elastic limiting arm 43 and its connection root with the body of the elastic buffer part 4, effectively preventing plastic deformation or fracture caused by local overload, and improving the reliability and service life of the buffer component; symmetrical or specific angle arrangement of limiting arm groups with different inclined directions (such as...) Figures 10-12 As shown, some parts are tilted to the left and some to the right, arranged in a V-shape or X-shape, which can provide a more balanced constraint force.

[0046] Furthermore, the number of elastic limiting arms 43 distributed in the first tilt direction may be the same as or different from the number of elastic limiting arms 43 distributed in the second tilt direction. In this embodiment, after fully weighing factors such as load balance, attitude stability, manufacturing feasibility, long-term reliability, and space utilization, the preferred solution is that the number of elastic limiting arms 43 distributed in the first tilt direction is the same as the number of elastic limiting arms 43 distributed in the second tilt direction.

[0047] In addition, such as Figure 11 As shown, the carrier 2 or base 1 is fixed to the elastic buffer part 4 by a concave-convex connection structure 6. At least a portion of the concave-convex connection structure 6 is provided on the carrier 2 or base 1, and the remaining portion is provided on the elastic buffer part 4. The at least portion and the remaining portion of the concave-convex connection structure 6 are fixed by an adhesive layer. Example 3

[0048] The structure and principle of this embodiment are basically the same as those of Embodiment 1 and Embodiment 2. The difference lies in that, in relation to the driving devices of Embodiment 1 and Embodiment 2, the camera module in this embodiment includes a driving device.

[0049] A camera module is a complete photographic device, typically including multiple components such as a lens, storage medium, display screen, and control panel. Outside the camera module, it also includes an external housing, control interface, display screen, memory card slot, etc., forming a complete working system capable of performing various functions such as image capture, real-time preview, storage, playback / transmission, etc., representing a more advanced application. Example 4

[0050] The structure and principle of this embodiment are basically the same as those of Embodiment 3. The difference lies in that, in relation to the camera module of Embodiment 3, the electronic device in this embodiment includes a camera module.

[0051] like Figure 14 As shown, electronic devices refer to those devices that rely on electronic technology to perform specific functions, such as processing signals, data, or converting energy. They are widely used in fields such as communication, computing, entertainment, and industrial control, including but not limited to smartphones, computers, televisions, audio systems, and medical instruments, which greatly improve the convenience and efficiency of modern life.

[0052] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A driving device, comprising a base (1) and a carrier (2) that moves linearly relative to the base (1) along a first axis (Z) under the drive of a driving assembly, wherein an elastic buffer portion (4) is provided on the base (1) and / or the carrier (2) to limit the movement of the carrier (2), characterized in that, The elastic buffer (4) has an outwardly protruding contact portion (40) that can make point contact with the base (1) or the carrier (2) when the carrier (2) moves.

2. The drive apparatus according to claim 1, characterized by The elastic buffer (4) includes at least one convex contact (40), and the outer surface of each convex contact (40) is an arc-shaped limiting convex surface (41).

3. The drive apparatus according to claim 2, characterized by Each of the protruding contact portions (40) has a pressure-reducing cavity (42) inside.

4. The drive apparatus according to claim 3, characterized by The decompression cavity (42) is connected to the outside.

5. The drive arrangement of any one of claims 2-4, wherein, The elastic buffer (4) has a plurality of arc-shaped limiting protrusions (41) distributed at intervals in a plane (xY) perpendicular to the first axis (Z).

6. The drive apparatus according to any one of claims 1 to 4, characterized by The elastic buffer (4) is provided on either the carrier (2) or the base (1), and the limiting impact surface (5) is provided on the other.

7. The drive apparatus according to any one of claims 1 to 4, characterized by The carrier (2) or the base (1) is fixed to the elastic buffer (4) by a concave-convex connection structure (6), at least part of which is provided on the carrier (2) or the base (1), and the remaining part is provided on the elastic buffer (4).

8. The drive apparatus according to claim 7, characterized by At least a portion and the remainder of the concave-convex connection structure (6) are fixed by an adhesive layer.

9. A camera module characterized by, The camera module includes the driving device as described in any one of claims 1-8.

10. An electronic device, characterized by The electronic device includes the camera module as described in claim 9.

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