Long-stroke multi-sensor camera shooting driving device

Abstract

The utility model provides a long-stroke multi-sensor camera shooting driving device, relates to the technical field of optical element driving, and aims to solve the problem that sensor installation and cost control are difficult to consider in the structural design of an existing driving device. The long-stroke multi-sensor camera shooting driving device comprises a rotor, a stator, a driving assembly and a connecting piece, the rotor is arranged in the stator; the driving assembly comprises a driving magnet and a driving coil, the driving magnet is arranged on the rotor, the driving coil is arranged on the stator, and the driving magnet and the driving coil are oppositely arranged; and the connecting piece is arranged on the stator and is electrically connected with the driving coil. Therefore, the structure of the whole driving device is simpler and more compact, the problem that the sensor is difficult to install can be effectively solved, and meanwhile the production cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical element driving, and in particular to a long-stroke multi-sensor camera driving device. Background Art

[0002] With the rapid development of electronic technology, cameras, as a device for collecting pictures or videos, are becoming increasingly popular in mobile devices, drones, vehicles, etc. In order to obtain clearer images, camera modules usually have autofocus functions (by automatically adjusting the distance between the image sensor and the lens to align the focal length of the lens) and zoom functions (by increasing or decreasing the magnification of distant subjects through zoom lenses to shoot distant subjects).

[0003] At present, the existing technology usually adopts a camera module that can achieve continuous zoom, and uses a micro motor to drive the lens group to achieve zoom with a long stroke of more than 3000um. However, the existing drive device has a complex structure, cumbersome manufacturing process, and needs to be used in conjunction with a magnetic grid, which has a high production cost. In addition, due to the structural design of the existing drive device, there are strict restrictions on the size and weight of the sensor, and some high-precision sensors are difficult to install and use. Therefore, the structural design of the existing drive device has many flaws, and it is difficult to take into account both sensor installation and cost control. Utility Model Content

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a long-stroke multi-sensor camera drive device to solve the problem that it is difficult to take into account both sensor installation and cost control in the structural design of the existing drive device.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] The utility model provides a long-stroke multi-sensor camera driving device, which comprises: a mover, a stator, a driving assembly, and an electrical connector; the mover is arranged in the stator; the driving assembly comprises: a driving magnet and a driving coil, the driving magnet is arranged on the mover, the driving coil is arranged on the stator, and the driving magnet and the driving coil are arranged opposite to each other; the electrical connector is arranged on the stator and is electrically connected to the driving coil.

[0007] Furthermore, the long-stroke multi-sensor camera driving device also includes: at least two Hall sensors arranged opposite to the driving magnet; the Hall sensor is electrically connected to the electrical connector and interacts with the driving magnet.

[0008] Furthermore, the electrical connector is an FPCB circuit board, which is arranged on the outer annular surface of the stator, and the drive coil is arranged on the FPCB circuit board.

[0009] Furthermore, the electrical connector is a metal reinforcement, the metal reinforcement is injection molded in the stator, and the drive coil is arranged on the stator.

[0010] Furthermore, the driving coil and the Hall sensor share a driving magnet.

[0011] Furthermore, the long-stroke multi-sensor camera drive device also includes: a guide structure arranged between the mover and the stator; the guide structure includes: a guide rod and a guide groove arranged along the optical axis direction, after the guide rod and the guide groove are installed in coordination, the mover reciprocates relative to the stator along the optical axis direction.

[0012] Furthermore, a guide groove is provided on the lower bottom surface of the mover, and a guide rod is provided at the matching position between the stator and the lower bottom surface of the mover.

[0013] Furthermore, a guide rod is provided on the lower bottom surface of the mover, and a guide groove is provided at the matching position of the stator and the lower bottom surface of the mover.

[0014] The beneficial effects of the utility model are as follows: the long-stroke multi-sensor camera driving device provided by the utility model has the following advantages:

[0015] 1. The drive device of the utility model includes: a mover, a stator, a drive assembly, and an electrical connector; the mover is arranged in the stator; the drive assembly includes: a drive magnet and a drive coil, the drive magnet is arranged on the mover, the drive coil is arranged on the stator, and the drive magnet and the drive coil are arranged opposite to each other; the electrical connector is arranged on the stator and is electrically connected to the drive coil. In this way, the mechanism of the drive device of the utility model is more compact and reasonable, the number of magnetic grids is reduced, and the production cost is effectively reduced.

[0016] 2. The utility model also makes the structure of the entire driving device simpler and more compact by arranging the driving coil and the Hall sensor on the electrical connector (such as the FPCB circuit board), and the driving coil and the Hall sensor share the driving magnet. In addition, since the structure of the entire driving device is more compact, multiple Hall sensors can be installed, the detection accuracy can be improved, and the lens can be adjusted more accurately.

[0017] In summary, the structural improvement of the driving device proposed by the present invention effectively solves the problems of difficulty in sensor installation and production cost control in the structural design of the existing driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded schematic diagram of the overall structure of a long-stroke multi-sensor camera drive device of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of a long-stroke multi-sensor camera drive device of the utility model;

[0020] Figure 3 This is a schematic diagram of a stator structure of the utility model;

[0021] Figure 4 The utility model is a schematic diagram of a movable structure.

[0022] In the figure: 1. mover; 2. stator; 3. drive assembly; 31. drive magnet; 32. drive coil 4. electrical connector; 5. Hall sensor; 6. guide structure; 61. guide rod; 62. guide groove. DETAILED DESCRIPTION

[0023] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0025] like Figure 1 As shown, a long-stroke multi-sensor camera driving device includes: a mover 1, a stator 2, a driving component 3, and an electrical connector 4; the mover 1 is arranged in the stator 2; the driving component 3 includes: a driving magnet 31 and a driving coil 32, the driving magnet 31 is arranged on the mover 1, the driving coil 32 is arranged on the stator 2, and the driving magnet 31 and the driving coil 32 are arranged opposite to each other; the electrical connector 4 is arranged on the stator 2 and electrically connected to the driving coil 32.

[0026] It should be noted that the optical element (such as a lens, a lens group, etc.) is arranged on the mover 1, which is not shown in the figure. The mover 1 can reciprocate along the optical axis relative to the stator 2, thereby driving the optical element to achieve focusing and zooming functions.

[0027] Optional, such as Figure 2 As shown, the stator 2 can be a hexahedral structure with 5 hollowed-out sides. The hollowed-out space along the optical axis can be adapted to the optical components. The upper end of the stator 2 is open to facilitate the installation of the mover 1. The lower end of the cavity of the stator 2 is provided with a guide structure (such as a guide rod 61) adapted to the mover 1. Figure 3 As shown, the mover 1 is a hexahedral cavity structure, which is hollowed out along the optical axis direction. A magnet mounting position is provided on the end face perpendicular to the optical axis, and a driving magnet 31 can be installed. The corresponding position of the stator 2 is hollowed out, and a guide structure (such as a guide groove 62) adapted to the stator 2 is provided on the lower bottom surface of the mover 1. After coordinated installation, the mover 1 can reciprocate along the optical axis direction relative to the stator 2, thereby realizing the focusing and zooming of the optical element.

[0028] Optional, combined Figure 2 , Figure 3 ,like Figure 1As shown, the long-stroke multi-sensor camera driving device further includes: a guide structure 6 arranged between the mover 1 and the stator 2. The guide structure 6 includes: a guide rod 61 arranged along the optical axis direction and a guide groove 62 arranged along the optical axis direction. After the guide rod 61 and the guide groove 62 are installed in coordination, the mover 1 reciprocates relative to the stator 2 along the optical axis direction.

[0029] The guide rod 61 may be disposed on the mover 1 or the stator 2 , and the guide groove 62 may be disposed on the stator 1 or the mover 2 .

[0030] Optional, such as Figure 2 and Figure 3 As shown, a guide groove 62 is provided on the lower bottom surface of the mover 1 , and a guide rod 61 is provided at the matching position between the stator 2 and the lower bottom surface of the mover 1 .

[0031] Optionally, another implementation is: a guide rod 61 is provided on the lower bottom surface of the mover 1, and a guide groove 62 is provided at the matching position between the stator 2 and the lower bottom surface of the mover 1. It should be noted that this implementation is not shown in the figure.

[0032] Optional, such as Figure 1 and Figure 4 As shown, the long-stroke multi-sensor camera driving device further includes: at least two Hall sensors 5 ( Figure 4 4 Hall sensors are shown in FIG. 4 ). The Hall sensor 5 is electrically connected to the electrical connector 4 and interacts with the driving magnet 31. The driving coil 32 and the Hall sensor 5 may share the driving magnet 31.

[0033] It should be noted that the Hall sensor 5 can accurately measure the displacement of the mover 1 by detecting the change in the magnetic field between the Hall sensor 5 and the driving magnet 31 during the displacement process, thereby more accurately adjusting the focus and zoom of the lens.

[0034] Optionally, if the electrical connector 4 is an FPCB circuit board, it can be arranged on the outer annular surface of the stator 2, and the drive coil 32 is arranged on the FPCB circuit board. In this case, the drive coil 32 and the Hall sensor 5 can be attached to the FPCB circuit board together, and the drive coil 32 and the Hall sensor 5 can share the drive magnet 31, so that the structure of the entire drive device can be simpler and more compact, and the space utilization can be more reasonable, which effectively reduces the production cost and also increases the installation space of the Hall sensor 5.

[0035] Optionally, if the electrical connector 4 is a metal reinforcement, the metal reinforcement is injection molded in the stator 2, and the drive coil 32 is disposed on the stator 2. At this time, if the drive coil 32 and the Hall sensor 5 are to be attached to the metal reinforcement, the structure of the metal reinforcement needs to be adaptively adjusted.

[0036] It should be noted that if Figure 1 and Figure 4 As shown, the electrical connector 4 may be one or two. Figure 1 and Figure 4 In the figure, two are shown. The electrical connector 4 disposed on the side of the driving magnet 31 can conduct magnetism or amplify the magnetic field. The electrical connector 4 disposed on the opposite side can be an "L"-shaped plate for convenient fixed installation. If there is only one electrical connector 4, it is disposed on the opposite side of the driving magnet 31 (i.e., Figure 4 The position where the Hall element 5 and the drive coil 32 are currently installed).

[0037] The long-stroke multi-sensor camera driving device provided by the utility model, on the one hand, has a more compact and reasonable structure of the driving device, reduces the number of magnetic grids, and effectively reduces the production cost. On the other hand, the utility model also sets a driving coil 32 and a Hall sensor 5 on an electrical connector 4 (such as an FPCB circuit board), and the driving coil 32 and the Hall sensor 5 can share a driving magnet 31, so that the structure of the entire driving device is simpler and more compact. In addition, since the structure of the entire driving device is more compact, multiple Hall sensors 5 can be installed to improve the accuracy of detection, and the lens can be adjusted more accurately.

Claims

1. A long-stroke multi-sensor camera driving device, characterized in that: The long-stroke multi-sensor camera driving device comprises: a mover (1), a stator (2), a driving component (3), and an electrical connector (4); The mover (1) is arranged in the stator (2); The driving assembly (3) comprises: a driving magnet (31) and a driving coil (32), wherein the driving magnet (31) is arranged on the mover (1), and the driving coil (32) is arranged on the stator (2), and the driving magnet (31) and the driving coil (32) are arranged opposite to each other; The electrical connector (4) is arranged on the stator (2) and is electrically connected to the drive coil (32).

2. The long-stroke multi-sensor camera driving device according to claim 1, characterized in that: The long-stroke multi-sensor camera driving device further comprises: at least two Hall sensors (5) arranged opposite to the driving magnet (31); The Hall sensor (5) is electrically connected to the electrical connector (4) and interacts with the driving magnet (31).

3. The long-stroke multi-sensor camera driving device according to claim 1, characterized in that: The electrical connector (4) is a FPCB circuit board, which is arranged on the outer annular surface of the stator (2), and the drive coil (32) is arranged on the FPCB circuit board.

4. The long-stroke multi-sensor camera driving device according to claim 1, characterized in that: The electrical connector (4) is a metal reinforcement member, the metal reinforcement member is injection-molded in the stator (2), and the drive coil (32) is arranged on the stator (2).

5. A long-stroke multi-sensor camera driving device according to claim 3 or 4, characterized in that: The driving coil (32) and the Hall sensor (5) share the driving magnet (31).

6. The long-stroke multi-sensor camera driving device according to claim 1, characterized in that: The long-stroke multi-sensor camera driving device further comprises: a guide structure (6) arranged between the mover (1) and the stator (2); The guide structure (6) comprises: a guide rod (61) and a guide groove (62) arranged along the optical axis direction; after the guide rod (61) and the guide groove (62) are mounted in cooperation, the mover (1) reciprocates relative to the stator (2) along the optical axis direction.

7. The long-stroke multi-sensor camera driving device according to claim 6, characterized in that: The guide groove (62) is provided on the lower bottom surface of the mover (1), and the guide rod (61) is provided at the matching position between the stator (2) and the lower bottom surface of the mover (1).

8. The long-stroke multi-sensor camera driving device according to claim 6, characterized in that: The guide rod (61) is provided on the lower bottom surface of the mover (1), and the guide groove (62) is provided at the matching position between the stator (2) and the lower bottom surface of the mover (1).

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