Mirror frame mounting structure of focusing module

Abstract

The utility model discloses a lens frame mounting structure of a focusing module, which comprises a fixed base, a movable lens frame is embedded in a base light through hole of the fixed base, and a magnetic component is arranged between the fixed base and the movable lens frame; the magnetic attraction assembly comprises a first magnet set and a second magnet set, the first magnet set comprises a plurality of base magnets which are distributed in an annular array mode with the axis of the base light through hole as the center, and the base magnets are fixedly installed on the inner wall of the base light through hole. The second magnet set comprises a plurality of mirror frame magnets which are distributed in an annular array mode with the axis of the movable mirror frame as the center, all the mirror frame magnets are fixedly installed on the outer side wall of the movable mirror frame, and the first magnet set and the second magnet set are arranged in a staggered mode in the Z-axis direction. Through the structural design, the utility model has the advantage of novel structural design, and the movable mirror frame can be subjected to the simultaneous action of axial holding force and radial holding force when in use, so that the movable mirror frame does not shift in the axial direction and the radial direction after the external impact shake is eliminated.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, and in particular to a lens frame mounting structure for a focusing module. Background Technology

[0002] The Chinese utility model patent with patent number ZL202221963411.7 and patent title "A Novel Magnetic Focusing Module Structure" discloses the following technical solution: A novel magnetic focusing module structure includes a fixed base and a movable lens frame. The movable lens frame is used to mount the lens. The fixed base has a base receiving cavity (base light-transmitting hole) that is completely through from top to bottom. The movable lens frame is embedded in the base receiving cavity of the fixed base. The fixed base is equipped with a focusing drive mechanism, which is drivenly connected to the movable lens frame. The fixed base is equipped with a fixed magnet, and the movable lens frame is equipped with a movable magnetic suction component, which is located on the upper side of the fixed magnet.

[0003] When the above-mentioned new magnetic focusing module structure is working, the movable magnetic component is installed on the movable lens frame, and the fixed magnet is installed on the fixed base. The fixed magnet keeps the movable magnetic component of the movable lens frame magnetically attracted, and the attraction force of the fixed magnet on the movable magnetic component is kept downward (i.e., axial holding force). That is, the movable lens frame and the camera lens are always subjected to the downward axial holding force when in use. When the movable lens frame and the camera lens are subjected to external impact and shaking during use, the axial holding force can make the movable lens frame return to its original position after the impact and shaking are eliminated. Therefore, theoretically, there is no Z-axis movement of the movable lens frame, that is, the camera lens has no defocus.

[0004] It should be noted that, for the aforementioned novel magnetic focusing module structure, since the movable magnetic components and the fixed magnets are arranged at intervals, the fixed magnets only exert an axial holding force on the movable lens frame. This axial holding force can ensure that the movable lens frame does not move along the Z-axis and does not have a defocusing function. However, since the fixed base does not exert a radial holding force on the movable lens frame and the movable lens frame is movably installed in the light-transmitting hole of the fixed base, a radial gap inevitably exists between the movable lens frame and the fixed base. Without the action of radial holding force, when the movable lens frame shakes due to external impact, it will experience radial movement. Even after the external impact is eliminated, the movable lens frame will not return to a state concentric with the light-transmitting hole of the fixed base, resulting in poor stability, reliability, and accuracy in use. Utility Model Content

[0005] The purpose of this utility model is to provide a lens frame mounting structure for a focusing module to address the shortcomings of existing technologies. This lens frame mounting structure has a novel design. During use, the movable lens frame is subjected to both axial and radial holding forces. After the external impact and shaking are eliminated, the movable lens frame does not shift axially or radially. In other words, this lens frame mounting structure can effectively improve the stability, reliability, and accuracy of the focusing module.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] A lens frame mounting structure for a focusing module includes a fixed base, the fixed base having a vertically penetrating, circular light-transmitting hole, a movable lens frame being embedded in the light-transmitting hole of the fixed base, and a magnetic suction component being installed between the fixed base and the movable lens frame.

[0008] The magnetic attraction assembly includes a first magnet group and a second magnet group. The first magnet group includes several base magnets arranged in a circular array around the axis of the light-transmitting hole of the base. Each base magnet is fastened to the inner wall of the light-transmitting hole of the base.

[0009] The second magnet group includes several frame magnets arranged in a circular array around the axis of the movable frame, with each frame magnet being securely mounted on the outer side wall of the movable frame; the number of base magnets is the same as the number of frame magnets, and the first magnet group and the second magnet group are staggered in the Z-axis direction.

[0010] The inner wall of the light-transmitting hole of the base is provided with a base mounting groove corresponding to each of the base magnets, and each base magnet is fixedly installed in the corresponding base mounting groove by applying glue.

[0011] The outer wall of the movable frame is provided with a frame mounting groove corresponding to each frame magnet, and each frame magnet is fixedly installed in the corresponding frame mounting groove by applying glue.

[0012] Each of the base magnets is arc-shaped, and each of the frame magnets is also arc-shaped.

[0013] Compared with the prior art, this utility model has the following beneficial effects: Specifically, because the first magnet group and the second magnet group are staggered in the Z-axis direction, the magnetic attraction force between each base magnet and the corresponding frame magnet can be decomposed into radial force and axial force. The radial force forms a radial holding force acting on the movable frame, and the axial force forms an axial holding force acting on the movable frame. The aforementioned axial holding force effectively ensures that the movable frame axially returns to a fixed state after the external impact and shaking are eliminated, thus preventing axial displacement of the movable frame. The aforementioned radial holding force effectively ensures that the movable frame returns to a state concentric with the light-transmitting hole of the base after the external impact and shaking are eliminated, thus preventing radial displacement of the movable frame. Therefore, this utility model has the advantage of novel structural design, and enables the movable frame to be subjected to both axial and radial holding forces during use. After the external impact and shaking are eliminated, there is no axial or radial displacement of the movable frame. That is, the frame mounting structure of this focusing module can effectively improve the stability, reliability, and accuracy of the focusing module. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a half-sectional schematic diagram of the present invention.

[0018] exist Figures 1 to 3 This includes:

[0019] 1-Fixed base; 11-Light-transmitting hole in the base; 12-Base mounting slot; 2-Modible frame; 21-Frame mounting slot; 3-First magnet group; 31-Base magnet; 4-Second magnet group; 41-Frame magnet. Detailed Implementation

[0020] The present invention will now be described in conjunction with specific embodiments.

[0021] Example 1, as Figures 1 to 3 As shown, a lens frame mounting structure for a focusing module includes a fixed base 1, the fixed base 1 having a vertically penetrating, circular light-transmitting hole 11, a movable lens frame 2 being embedded in the light-transmitting hole 11 of the fixed base 1, and a magnetic suction component being installed between the fixed base 1 and the movable lens frame 2.

[0022] Further, such as Figure 2 and Figure 3 As shown, the magnetic attraction assembly includes a first magnet group 3 and a second magnet group 4. The first magnet group 3 includes a plurality of base magnets 31 arranged in a circular array with the axis of the light-transmitting hole 11 of the base as the center. Each base magnet 31 is fastened to the inner wall of the light-transmitting hole 11 of the base.

[0023] Furthermore, such as Figure 2 and Figure 3 As shown, the second magnet group 4 includes several frame magnets 41 arranged in a circular array around the axis of the movable frame 2. Each frame magnet 41 is fastened to the outer side wall of the movable frame 2. The number of base magnets 31 is the same as the number of frame magnets 41. The first magnet group 3 and the second magnet group 4 are staggered in the Z-axis direction.

[0024] It should be explained that all the base magnets 31 in the first magnet group 3 are horizontally aligned, and all the frame magnets 41 in the second magnet group 4 are horizontally aligned, as shown below. Figure 3 As shown, the center height of the first magnet group 3 and the center height of the second magnet group 4 have a height difference H, so as to achieve the staggered arrangement of the first magnet group 3 and the second magnet group 4 in the Z-axis direction. In addition, the number of base magnets 31 is the same as the number of frame magnets 41, and each base magnet 31 is radially aligned with one frame magnet 41.

[0025] In the lens frame mounting structure using the focusing module of this embodiment, there is a magnetic attraction force between the first magnet group 3 and the second magnet group 4. This magnetic attraction force can be either an attractive force or a repulsive force. When the polarity of the inner surface of the base magnet 31 is the same as the polarity of the outer surface of the lens frame magnet 41, the magnetic attraction force is a repulsive force; when the polarity of the inner surface of the base magnet 31 is opposite to the polarity of the outer surface of the lens frame magnet 41, the magnetic attraction force is an attractive force. Since the first magnet group 3 and the second magnet group 4 are staggered in the Z-axis direction, the magnetic attraction force between each base magnet 31 and the corresponding lens frame magnet 41 can be decomposed into radial force and axial force. The radial force can form a radial holding force acting on the movable lens frame 2, and the axial force can form an axial holding force acting on the movable lens frame 2.

[0026] Regarding the axial holding force formed by the magnetic action of the first magnet group 3 and the second magnet group 4, as in the prior art, this axial holding force can effectively ensure that the movable frame 2 is axially reset to a fixed state after the external impact and shaking are eliminated, so as to avoid axial displacement of the movable frame 2 and thus ensure that the movable frame 2 has no displacement or defocus in the Z-axis direction. Regarding the radial holding force formed by the magnetic action of the first magnet group 3 and the second magnet group 4, since the multiple base magnets 31 of the first magnet group 3 are arranged in a ring array and the multiple frame magnets 41 of the second magnet group 4 are also arranged in a ring array, the movable frame 2 will be subjected to multiple radial forces arranged in a ring array. The aforementioned radial holding force can effectively ensure that the movable frame 2 is reset to a state concentric with the light-transmitting hole 11 of the base after the external impact and shaking are eliminated, so as to avoid radial displacement of the movable frame 2 and thus ensure that the movable frame 2 has no radial displacement.

[0027] In summary, the lens frame mounting structure of the focusing module in this embodiment has the advantage of novel structural design through the above structural design. It can make the movable lens frame 2 subject to axial holding force and radial holding force at the same time during use. After the external impact and shaking are eliminated, the movable lens frame 2 has no axial or radial displacement. That is, the lens frame mounting structure of the focusing module can effectively improve the stability, reliability and accuracy of the focusing module.

[0028] Example 2, as Figure 2 and Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that: the inner wall of the light-transmitting hole 11 of the base is provided with a base mounting groove 12 corresponding to each base magnet 31, and each base magnet 31 is fixedly installed in the corresponding base mounting groove 12 by applying glue.

[0029] Similarly, the outer side wall of the movable frame 2 is provided with a frame mounting groove 21 corresponding to each frame magnet 41, and each frame magnet 41 is fixedly installed in the corresponding frame mounting groove 21 by applying glue.

[0030] During the installation of the base magnet 31, the base magnet 31 is first embedded and positioned in the base mounting groove 12 of the fixed base 1, and then the base magnet 31 is fixed in the base mounting groove 12 by applying glue. The base mounting groove 12 can quickly position the base magnet 31 to improve the convenience of assembling the base magnet 31.

[0031] During the installation of the frame magnet 41, the frame magnet 41 is first embedded and positioned in the frame mounting groove 21 of the movable frame 2, and then the frame magnet 41 is fixed in the frame mounting groove 21 by applying glue. The frame mounting groove 21 can quickly position the frame magnet 41 to improve the convenience of assembling the frame magnet 41.

[0032] Example 3, as Figure 2 As shown, the difference between this embodiment three and embodiment one is that each base magnet 31 is in the shape of an arc, and each frame magnet 41 is also in the shape of an arc.

[0033] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A lens frame mounting structure for a focusing module, comprising a fixed base (1), the fixed base (1) having a vertically penetrating, circularly shaped base light hole (11), a movable lens frame (2) being embedded in the base light hole (11) of the fixed base (1), and a magnetic suction assembly being installed between the fixed base (1) and the movable lens frame (2). Its features are: The magnetic attraction assembly includes a first magnet group (3) and a second magnet group (4). The first magnet group (3) includes a plurality of base magnets (31) arranged in a ring array with the axis of the light-transmitting hole (11) of the base as the center. Each base magnet (31) is fastened to the inner wall of the light-transmitting hole (11) of the base. The second magnet group (4) includes several frame magnets (41) arranged in a ring array around the axis of the movable frame (2). Each frame magnet (41) is fastened to the outer side wall of the movable frame (2). The number of base magnets (31) is the same as the number of frame magnets (41). The first magnet group (3) and the second magnet group (4) are staggered in the Z-axis direction.

2. The lens frame mounting structure for a focusing module according to claim 1, characterized in that: The inner wall of the light-transmitting hole (11) of the base is provided with a base mounting groove (12) corresponding to each of the base magnets (31), and each base magnet (31) is fixedly installed in the corresponding base mounting groove (12) by applying glue.

3. The lens frame mounting structure for a focusing module according to claim 1, characterized in that: The outer side wall of the movable frame (2) is provided with a frame mounting groove (21) corresponding to each of the frame magnets (41), and each frame magnet (41) is fixedly installed in the corresponding frame mounting groove (21) by applying glue.

4. The lens frame mounting structure for a focusing module according to claim 1, characterized in that: Each of the base magnets (31) is arc-shaped, and each of the frame magnets (41) is also arc-shaped.

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