Prism driving mechanism and camera module

Abstract

The utility model relates to a prism driving mechanism and a camera module, which comprise a base, a movable frame arranged on the base and driven by a first driving assembly to rotate around a first shaft, and a carrier arranged on the movable frame and driven by a second driving assembly to rotate around a second shaft perpendicular to the first shaft, the two opposite sides of the carrier and the two opposite sides of the movable frame are rotationally connected through rotating supporting sets respectively, a limiting structure is arranged between at least one rotating supporting set and the carrier and / or the movable frame, and the limiting structure enables the carrier to be fixed relative to the movable frame in the axial direction of the second shaft. The limiting structure enables the carrier to be fixed relative to the movable frame in the axial direction of a third shaft perpendicular to the first shaft and the second shaft. The device has the advantages that the limiting structure is matched with the rotary supporting set, so that components are accurately positioned in the axial direction, stable limiting is kept, movement is prevented, and meanwhile the contact area of the double shafts is large, so that the reliability effect can be improved, and the risk of chip rising due to collision is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electronic equipment camera, especially relate to a prism drive mechanism and camera module. BACKGROUND

[0002] Mobile phone photography optical image stabilization is a kind of action stabilization platform technology, aims at reducing the influence caused by mobile phone camera shaking and vibration and other factors on image stability.In the process of mobile phone shooting, due to the hand tremor, object movement and other factors when shooting, often lead to picture blur, distortion and other problems, at this time camera optical image stabilization technology can play an important role.

[0003] Camera optical image stabilization technology adopts mechanical stabilization device, realizes that camera makes adaptive adjustment with the change of external environment through the electronic system of control unit and motion sensor.That is, according to the shaking and vibration trajectory of mobile phone judged by external factors, and through the position of control lens or camera sensor component to balance the shaking and vibration force, so that the clarity and stability of picture can be guaranteed when shooting still photo or continuous dynamic video.

[0004] Optical image stabilization adopts pure optical method to correct, compared with digital image stabilization, higher reliability, still has the advantage in the case of insufficient light, and also can focus quickly, picture is more stable, the image taken is more clear and natural.

[0005] In the prior art, the prism motor is a single carrier structure, and the performance is limited. UTILITY MODEL CONTENT

[0006] The utility model aims at the above-mentioned problem, provides a prism drive mechanism and camera module that can solve the above-mentioned technical problem.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] Prism drive mechanism, including base, be equipped with the dynamic frame that rotates around the first shaft under the drive of the first drive assembly on the base, be equipped with the carrier that rotates around the second shaft perpendicular to the first shaft under the drive of the second drive assembly on the dynamic frame, the opposite sides of the carrier and the opposite sides of the dynamic frame are connected respectively through the rotation support group, at least one rotation support group is equipped with the limiting structure between the carrier and / or the dynamic frame, the limiting structure makes the carrier fixed relative to the dynamic frame in the axial direction of the second shaft, the limiting structure makes the carrier fixed relative to the dynamic frame in the axial direction of the third shaft perpendicular to the first shaft and the second shaft.

[0009] Further, one of the rotating support groups and the moving frame or the carrier is integrally formed with the other rotating support group.

[0010] Further, the moving frame and / or the carrier is provided with a matching groove corresponding to each rotating support group, the outer circumferential surface of each rotating support group is in movable contact with the corresponding matching groove, at least one matching groove corresponding to one rotating support group is provided with the limiting structure, and the limiting structure comprises at least three limiting surfaces provided in the matching groove, and the limiting surfaces are circumferentially arranged around the rotating support group and in contact with the rotating support group.

[0011] Further, the rotating support group is at least part of a spherical structure or at least part of a cylindrical structure.

[0012] Further, the rotating support group is at least part of a cylindrical structure, and the rotating support group has a ridge at each axial end, and the two limiting surfaces are in movable contact with one ridge.

[0013] Further, the ridge is a circular arc ridge, and the limiting surface has an inclined surface in tangential contact with the ridge.

[0014] Further, the ridge is an inclined ridge, and the limiting surface has an arc convex surface in tangential contact with the ridge.

[0015] Further, the first driving assembly and the second driving assembly are both electromagnetic driving assemblies, the first driving assembly is distributed on a vertical surface formed by the first shaft and the second shaft, and the second driving assembly is distributed on the vertical surface or a plane perpendicular to the vertical surface.

[0016] As an application scheme, the application further provides a prism driving mechanism, which comprises a base, a carrier rotating about an axis relative to the base, and rotating connections between opposite sides of the carrier and opposite sides of the base through rotating support groups, the two rotating support groups are on the same axis, at least one rotating support group is provided with a limiting structure between the carrier and / or the base, the limiting structure fixes the carrier relative to the base in the axial direction of the second shaft, and the limiting structure fixes the carrier relative to the base in the axial direction of a third shaft perpendicular to the first shaft and the second shaft.

[0017] As an application scheme, the application further provides a camera module, which is characterized in that the camera module comprises the prism driving mechanism.

[0018] Compared with the prior art, the application has the advantages that the cooperation of the limiting structure and the rotating support group enables accurate positioning and stable limiting of the components in the axial direction and prevents the components from moving together. Attached Figure Description

[0019] Figure 1 This is an assembly drawing of the lens driving device of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the central prism drive mechanism component suspended on the right front;

[0021] Figure 3 for Figure 1 Schematic diagram of the middle prism drive mechanism component suspended at the right rear;

[0022] Figure 4 This is a front left view of the exploded prism drive mechanism component of this utility model.

[0023] Figure 5 for Figure 4 Image 1 shows magnified details of the main components in area A.

[0024] Figure 6 for Figure 4 Two magnified details of the main components in area A;

[0025] Figure 7 for Figure 4 Enlarged detail images of the main components in area B;

[0026] Figure 8 This is a bottom left exploded view of the prism drive mechanism component of this utility model;

[0027] Figure 9 for Figure 8 Enlarged detail images of the main components in area C;

[0028] Figure 10 This is a front left view of the exploded main components of the spherical rotating support assembly of this utility model;

[0029] Figure 11 This is a rear view of the exploded main components of the spherical rotary support assembly of this utility model;

[0030] Figure 12 This is a schematic diagram illustrating an example of an electronic device in Example 5.

[0031] In the figure, the components are: base 1, moving frame 2, first drive assembly 3, first drive magnet 30, first drive coil 31, carrier 4, rotating support group 5, limiting structure 50, limiting surface 500, inclined surface 501, edge 51, positioning groove 52, mating groove 6, second drive assembly 7, second drive magnet 70, second drive coil 71, first axis Z, second axis Y, third axis X, vertical surface zY, and plane xY. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] like Figures 2-3 As shown, the prism driving mechanism includes a base 1 for supporting components. A movable frame 2, which rotates about a first axis Z under the drive of a first driving assembly 3, is mounted on the base 1. A carrier 4, which rotates about a second axis Y perpendicular to the first axis Z, is mounted on the movable frame 2 under the drive of a second driving assembly 7. The movable frame 2 is used for anti-shake head-shaking movements of the mechanism, and the carrier 4 is used for anti-shake head-nodding movements of the mechanism. In this embodiment, the carrier 4 is disposed within the movable frame 2. The carrier 4 is used to support a prism whose optical path direction can be changed.

[0038] likeFigure 4 As shown, the opposite sides of the carrier 4 in the second axis Y direction and the opposite sides of the movable frame 2 are respectively connected by rotating support groups 5, at least one rotating support group 5 is provided with a limiting structure 50 between the carrier 4 and / or the movable frame 2, the limiting structure 50 makes the carrier 4 fixed relative to the movable frame 2 in the axial direction of the second axis Y, that is, the carrier 4 cannot move linearly on the movable frame 2 along the axial direction of the second axis Y, the limiting structure 50 makes the carrier 4 fixed relative to the movable frame 2 in the axial direction of the third axis X perpendicular to the first axis Z and the second axis Y, that is, the carrier 4 cannot move linearly on the movable frame 2 along the axial direction of the third axis X. The two rotating support groups 5 constitute the second axis Y, and the carrier 4 can rotate relative to the movable frame 2 around the second axis Y.

[0039] One of the rotating support groups 5 and the movable frame 2 or the carrier 4 is integrally formed, and the other rotating support group 5 is movable relative to the movable frame 2 and the carrier 4. The rotating support group 5 is at least part of a spherical structure or at least part of a cylindrical structure. The rotating support group 5 can be selected as a ball structure, one of the balls is integrally formed with the movable frame 2, and at least part of the ball protrudes on the movable frame 2 towards one side of the carrier 4, and the other ball is movably arranged relative to the movable frame 2 and the carrier 4. The rotating support group 5 can also be selected as an axle body of a cylindrical structure, the central axis of the axle body is parallel to the second axis Y, one of the axle bodies is integrally formed with the movable frame 2, and at least part of the axle body protrudes on the movable frame 2 towards one side of the carrier 4, and the other axle body is movably arranged relative to the movable frame 2 and the carrier 4. In some embodiments, one of the rotating support groups 5 is a spherical structure, and the other rotating support group 5 is a cylindrical structure.

[0040] Specifically, as shown in Figures 5-9 The rotating support group 5 is a cylindrical structure, and the movable frame 2 and / or the carrier 4 is provided with a matching groove 6 corresponding to each rotating support group 5, the outer circumferential surface of the rotating support group 5 is in movable contact with the matching groove 6, and at least one matching groove 6 corresponding to one of the rotating support groups 5 is provided with a limiting structure 50, the limiting structure 50 includes at least three limiting surfaces 500 arranged in the matching groove 6, and the limiting surfaces 500 are circumferentially arranged around the rotating support group 5 and in contact with the rotating support group 5. In this embodiment, the matching groove 6 is arranged on the carrier 4, and the matching groove 6 is provided with four limiting surfaces 500 which are sequentially connected and circumferentially arranged around the rotating support group 5, and the rotating support group 5 is arranged on the movable frame 2. The movable contact design between the rotating support group 5 and the matching groove 6 enables smooth rotating movement between the movable frame 2 and the carrier 4, and the limiting structure 50 ensures accurate positioning in the second axis Y direction and the third axis X direction. In other embodiments, referring to Figure 10 and Figure 11 When the rotating support group 5 is a spherical structure, the matching groove 6 has three limiting surfaces 500 circumferentially arranged around the spherical structure.

[0041] At least part of the rotating support group 5 is installed in the positioning groove 52 of the moving frame 2, and the axial opposite positioning groove 52 of the rotating support group 5 is fixed, which is in contact with the rotating support group 5 about the two opposite side walls in the second axis Y direction, to further ensure that the rotating support group 5 is offset in the second axis Y direction.

[0042] The combination of the rotating support group 5 and the moving frame 2 or the carrier 4 is a split structure, and the combination can also be a one-piece structure, that is, the rotating support group 5 is integrated with the moving frame 2 or the carrier 4, specifically, one rotating support group 5 is integrated with the moving frame 2, or two rotating support groups 5 are integrated with the moving frame 2 respectively;

[0043] If the single rotating support group 5 is integrated with the moving frame 2 or the carrier 4: one rotating support group 5 is directly connected with the moving frame 2 or the carrier 4 to form a solid single structure. This design can simplify the assembly process, as the rotating support group 5 does not need to be installed separately, and it can also improve the rigidity and stability of the structure.

[0044] Or the double rotating support group 5 is integrated with the moving frame 2 or the carrier 4: two rotating support groups 5 are integrated with the moving frame 2 or the carrier 4 respectively. This design can provide additional support and stability. Each rotating support group 5 is directly connected with the moving frame 2 or the carrier 4, which can ensure the stability of the moving frame 2 and the carrier 4 when rotating relative to each other or bearing force.

[0045] To match the above-mentioned limiting structure 50, the rotating support group 5 is provided with a rib 51 at the axial end, and the limiting surface 500 of the limiting structure 50 is in contact with the rib 51 respectively, the rib 51 and the limiting surface 500 are in contact, which ensures that the rotating support group 5 is stably positioned in the limiting structure 50, preventing accidental movement or displacement of the rotating support group 5 in the axial direction, specifically, the rib 51 is a circular arc rib, and the limiting surface 500 has a slope 501 that is tangent to the rib 51. As Figure 11 And Figure 12 As shown in the application scheme, a spherical rotating support group 5 is also designed in this embodiment, which has the same limiting effect as the above-mentioned scheme, and can be selected according to the specific use conditions.

[0046] Example two

[0047] The structure and principle of this embodiment are basically the same as those of example one, the difference is that a different structure of the rib is provided at the axial ends of the rotating support group of the above-mentioned example one.

[0048] As Figures 5-6As shown, in this embodiment, edge 51 is a beveled edge, and the limiting surface 500 has an arc-shaped convex surface that tangentially contacts edge 51. This design allows for a smooth transition between the limiting surface 500 and edge 51, reducing stress concentration at the contact point while providing stable axial limiting. The design of the beveled edge 51 and the arc-shaped convex limiting surface 500 also simplifies the assembly process. Due to the matching shapes of the contact surfaces, the limiting surface 500 can be more easily adjusted to the correct position and fine-tuned to ensure optimal contact and limiting effects.

[0049] Example 3

[0050] The structure and principle of this embodiment are basically the same as those of Embodiment 1 and Embodiment 2. The difference lies in that, for the prism driving mechanism of Embodiment 1 and Embodiment 2, this embodiment describes the power composition of the prism driving mechanism.

[0051] like Figures 1-2 As shown, both the first drive assembly 3 and the second drive assembly 7 are electromagnetic drive assemblies. The first drive assembly 3 is located on the vertical plane zY formed by the first axis Z and the second axis Y, and the second drive assembly 7 is located on the vertical plane zY or on a plane xY perpendicular to the vertical plane zY. This design allows the first drive assembly 3 and the second drive assembly 7 to work together, achieving precise control of the moving frame 2 and the carrier 4 in multiple degrees of freedom. Under the joint movement of the moving frame 2 and the carrier 4, a shake-proof effect is achieved.

[0052] The first driving component 3 includes a first driving magnet 30 and a first driving coil 31 that cooperate with each other. In order to simplify the circuit design and reduce the failure rate, in this embodiment, the first driving magnet 30 is placed on the moving frame 2 and the first driving coil 31 is placed on the base 1. Similarly, the second driving component 7 includes a second driving magnet 70 and a second driving coil 71 that cooperate with each other. The second driving magnet 70 is placed on the moving frame 2 and the second driving coil 71 is placed on the base 1.

[0053] Example 4

[0054] The difference between this embodiment and Embodiment 1 is that the moving frame is omitted. The structure includes a base 1 and a carrier 4 that rotates relative to the base 1 about an axis. The opposite sides of the carrier 4 and the opposite sides of the base 1 are rotatably connected by rotating support groups 5. The two rotating support groups 5 are on the same axis. At least one of the rotating support groups 5 is provided with a limiting structure 50 between itself and the carrier 4 and / or the base 1. The limiting structure 50 fixes the carrier 4 relative to the base 1 along the second axis Y and also fixes the carrier 4 relative to the base 1 along a third axis X perpendicular to the first axis Z and the second axis Y. Of course, a moving frame that moves relative to the carrier 4 and is used to support the prism can be provided inside the carrier 4.

[0055] Embodiment five

[0056] The structure and principle of the embodiment are basically the same as those of embodiment four, and the difference lies in that, for the prism driving device in the above embodiments one to four, the camera module of the embodiment comprises a prism driving device and a lens driving device, the lens driving device is located at the rear side of the prism driving device after being reflected along the light path, the lens driving device is used to drive the lens group to focus or zoom, and the prism driving device is used to drive the prism to rotate for anti-shake.

[0057] As shown in Figure 12 The camera module is a device for adjusting the position or focal length of the lens, which is usually achieved by mechanical, electric or other means. The main function of the camera module is to adjust the position of the lens to control the focal length, focusing or focusing of the optical system, which is used to capture images and videos.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. Prism drive mechanism comprising a base (1) on which a mobile frame (2) is arranged which is rotatable about a first axis (Z) under the drive of a first drive assembly (3), on which mobile frame (2) a carrier (4) is arranged which is rotatable about a second axis (Y) perpendicular to the first axis (Z) under the drive of a second drive assembly (7), characterized in that, The opposite sides of the carrier (4) and the opposite sides of the movable frame (2) are respectively connected by rotating support groups (5), at least one of the rotating support groups (5) is provided with a limiting structure (50) between the carrier (4) and / or the movable frame (2), the limiting structure (50) makes the carrier (4) fixed relative to the movable frame (2) in the axial direction of the second shaft (Y), and the limiting structure (50) makes the carrier (4) fixed relative to the movable frame (2) in the axial direction of the third shaft (X) which is perpendicular to the first shaft (Z) and the second shaft (Y).

2. The prism driving mechanism according to claim 1, characterized by One of the rotating support groups (5) and the movable frame (2) or the carrier (4) are integrally formed, and the other rotating support group (5) and the movable frame (2) and the carrier (4) are relatively movable.

3. The prism driving mechanism according to claim 1, characterized by The movable frame (2) and / or the carrier (4) are provided with a matching groove (6) corresponding to each rotating support group (5), the outer circumferential surface of each rotating support group (5) is in movable contact with the corresponding matching groove (6), at least one of the matching grooves (6) corresponding to one of the rotating support groups (5) is provided with the limiting structure (50), the limiting structure (50) includes at least three limiting surfaces provided in the matching groove (6), and the limiting surfaces are circumferentially arranged around the rotating support group (5) and are in contact with the rotating support group (5).

4. The prism driving mechanism according to claim 2, characterized by The rotating support group (5) is at least part of a spherical structure or at least part of a cylindrical structure.

5. The prism driving mechanism according to claim 3, wherein The rotating support group (5) is at least part of a cylindrical structure, and the rotating support group (5) has a ridge (51) at each axial end, and the two limiting surfaces are in movable contact with one of the ridges (51).

6. The prism driving mechanism according to claim 5, wherein The ridge (51) is a circular arc ridge, and the limiting surface (500) has an inclined surface (501) in tangential contact with the ridge (51).

7. The prism driving mechanism according to claim 5, wherein The ridge (51) is an inclined ridge, and the limiting surface (500) has an arc convex surface in tangential contact with the ridge (51).

8. The prism driving mechanism according to claim 1, characterized by The first driving assembly (3) and the second driving assembly (7) are both electromagnetic driving assemblies, the first driving assembly (3) is distributed on a vertical surface (zY) formed by the first shaft (Z) and the second shaft (Y), and the second driving assembly (7) is distributed on the vertical surface (zY) or a plane (xY) perpendicular to the vertical surface (zY).

9. Prism drive mechanism comprising a base (1), a carrier (4) rotating about an axis relative to the base (1), characterized in that, The opposite sides of the carrier (4) and the opposite sides of the base (1) are respectively connected by rotating support groups (5), two of the rotating support groups (5) are on the same axis, at least one of the rotating support groups (5) is provided with a limiting structure (50) between the carrier (4) and / or the base (1), the limiting structure (50) makes the carrier (4) fixed relative to the base (1) in the axial direction of the second shaft (Y), and the limiting structure (50) makes the carrier (4) fixed relative to the base (1) in the axial direction of the third shaft (X) which is perpendicular to the first shaft (Z) and the second shaft (Y).

10. An image capture module, characterized by, The camera module comprises the prism driving mechanism of claim 9.

Images