Lens driving device, camera device and electronic equipment

Abstract

The present invention discloses a lens driving device, comprising a base, a carrier arranged in the base, a coil arranged along the outer side of the carrier, a magnet arranged outside the coil, a detection magnet arranged outside the coil, and a chip arranged at the edge of the base. By arranging the detection magnet and the chip outside the coil, the present invention eliminates the influence of the thickness of the coil on the distance between the detection magnet and the chip, thereby ensuring the sensing magnetic field strength of the detection magnet. In the case of limited space, a short mounting position can be arranged on the base, and a short magnet can be arranged in the short mounting position, thereby increasing the thrust.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a lens driving device, a camera device and an electronic device. Background Art

[0002] The detection magnet of the existing motor using closed-loop control is installed on the inner side of the coil, the chip is installed on the outer side of the coil, and two-sided magnets or four-sided magnets are arranged on the outer side of the coil.

[0003] The defects of this magnet installation structure are:

[0004] 1. The distance between the detection magnet and the chip is affected by the thickness of the coil. The thicker the coil, the farther the detection magnet is from the chip, and the weaker the magnetic field intensity sensed by the detection magnet.

[0005] 2. When magnets are used on both sides due to space limitations, the magnetic thrust is small. Summary of the invention

[0006] The purpose of the present invention is to provide a lens driving device, a camera device and an electronic device to solve the problems existing in the prior art.

[0007] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0008] A lens driving device comprises a base, a carrier arranged in the base, a coil arranged along the outer side of the carrier, a magnet arranged outside the coil, a detection magnet arranged outside the coil, and a chip arranged at the edge of the base.

[0009] Furthermore, the base includes a plate-like main body, a base through hole is opened in the middle position of the plate-like main body, a limit column is respectively provided at the four corner positions of the plate-like main body, adjacent limit columns constitute a long installation position, and a limit plate is respectively provided on a group of opposite sides of the plate-like main body, and the limit plate and the side limit column constitute a short installation position at the long installation position.

[0010] Furthermore, the carrier includes a hollow body, a carrier through hole is provided in the middle position of the hollow body, the carrier is arranged on the base, and the carrier through hole is opposite to the base through hole, an annular groove is provided along the outer surface of the carrier, a winding terminal is provided on one side of the carrier, and an installation groove is provided on the other side of the carrier, and the installation groove is located on the outside of the annular groove.

[0011] Furthermore, the coil is arranged in the annular groove of the carrier, and both ends of the coil are respectively wound on a winding terminal.

[0012] Furthermore, the magnets are arranged along the edge of the base, and the magnets include long magnets and short magnets. The long magnets are arranged in the long installation positions, and the short magnets are arranged in the short installation positions.

[0013] Furthermore, the detection magnet is arranged in the installation groove, the detection magnet is located outside the coil, and a limit plate is provided outside the detection magnet.

[0014] Furthermore, a chip slot is provided on the limit plate outside the detection magnet, the chip is arranged in the chip slot, a limit terminal is provided on the outer side of the limit plate, the flexible circuit board is connected to the limit plate through the limit terminal, and the chip is electrically connected to the flexible circuit board.

[0015] A photographing device has a lens driving device with the above structure.

[0016] An electronic device has a camera device with the above structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By arranging the detection magnet and the chip outside the coil, the influence of the coil thickness on the distance between the detection magnet and the chip is eliminated, thereby ensuring the sensing magnetic field strength of the detection magnet.

[0019] 2. When space is limited, a short mounting position can be set on the base, and a short magnet can be set in the short mounting position to increase the thrust. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the magnet installation structure described in the present invention.

[0021] Figure 2 It is a structural schematic diagram of the base described in the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the carrier described in the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the carrier described in the present invention.

[0024] Figure 5 It is a schematic structural diagram of the coil described in the present invention.

[0025] Figure 6 Schematic diagram of the coil and carrier according to the present invention.

[0026] Figure 7 The figure is a schematic diagram of the installation of the magnet described in the present invention.

[0027] Figure 8 This is a schematic diagram of the positions of the detection magnet, chip and flexible circuit board described in the present invention.

[0028] Fig. 9 It is a schematic diagram of the chip slot and the limiting terminal described in the present invention. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] See also Figure 1 The lens driving device of the present invention comprises a base (1), a carrier (2) arranged in the base (1), a coil (3) arranged along the outer side of the carrier (2), a magnet (4) arranged outside the coil (3), a detection magnet (5) arranged outside the coil (3), and a chip (6) arranged at the edge of the base (1).

[0031] The base (1) comprises a plate-shaped body (11), a base through hole (12) is provided in the middle of the plate-shaped body (11), a limiting column (13) is provided at each of the four corners of the plate-shaped body (11), adjacent limiting columns (13) form a long installation position (14), and a limiting plate (15) is provided on each of a group of opposite sides of the plate-shaped body (11), the limiting plate (15) and the lateral limiting columns (13) form a short installation position (16) at the long installation position (14).

[0032] The carrier (2) comprises a hollow body (21), a carrier through hole (22) is provided in the middle of the hollow body (21), the carrier (2) is arranged on the base (1), and the carrier through hole (22) is directly opposite to the base through hole (12), an annular groove (23) is provided along the outer side surface of the carrier (2), a winding terminal (24) is provided on one side of the carrier (2), and a mounting groove (25) is provided on the other side of the carrier (2), and the mounting groove (25) is located outside the annular groove (23).

[0033] The coil (3) is arranged in an annular groove (23) of the carrier (2), and both end portions of the coil (3) are respectively wound around a winding terminal (24).

[0034] The magnet (4) is arranged along the edge of the base (1), and the magnet (4) comprises a long magnet (41) and a short magnet (42). The long magnet (41) is arranged in the long installation position (14), and the short magnet (42) is arranged in the short installation position (16).

[0035] The detection magnet (5) is arranged in the installation groove (25), the detection magnet (5) is located outside the coil (3), and a limit plate (15) is arranged outside the detection magnet (5).

[0036] A chip slot (151) is provided on the limit plate (15) outside the detection magnet (5), the chip (6) is arranged in the chip slot (151), a limit terminal (152) is provided on the outer side surface of the limit plate (15), the flexible circuit board (7) is connected to the limit plate (15) via the limit terminal (152), and the chip (6) is electrically connected to the flexible circuit board (7).

[0037] Example 1

[0038] A lens driving device comprises a base (1), a carrier (2), a coil (3), a magnet (4), a detection magnet (5), a chip (6) and a flexible circuit board (7).

[0039] See also Figure 2 The base (1) comprises a plate-shaped body (11), a base through hole (12) is opened in the middle of the plate-shaped body (11), a limiting column (13) is respectively arranged at the four corners of the plate-shaped body (11), and adjacent limiting columns (13) form a long installation position (14), and a limiting plate (15) is respectively arranged on a group of opposite sides of the plate-shaped body (11), and the limiting plate (15) and the lateral limiting columns (13) form a short installation position (16) at the long installation position (14).

[0040] See also Figure 3 and Figure 4 The carrier (2) comprises a hollow body (21), a carrier through hole (22) is provided in the middle of the hollow body (21), the carrier (2) is arranged on the base (1), and the carrier through hole (22) is directly opposite to the base through hole (12), an annular groove (23) is provided along the outer surface of the carrier (2), a winding terminal (24) is provided on one side of the carrier (2), and a mounting groove (25) is provided on the other side of the carrier (2), and the mounting groove (25) is located outside the annular groove (23).

[0041] See also Figure 5 and Figure 6 The coil (3) is arranged in an annular groove (23) of the carrier (2), and the two end portions of the coil (3) are respectively wound on a winding terminal (24).

[0042] See also Figure 7 The magnet (4) is arranged along the edge of the base (1), and the magnet (4) includes a long magnet (41) and a short magnet (42). The long magnet (41) is arranged in the long installation position (14), and the short magnet (42) is arranged in the short installation position (16).

[0043] See also Figure 8The detection magnet (5) is arranged in the installation groove (25), the detection magnet (5) is located outside the coil (3), and a limit plate (15) is arranged outside the detection magnet (5). A chip groove (151) is opened on the limit plate (15) outside the detection magnet (5), the chip (6) is arranged in the chip groove (151), a limit terminal (152) is arranged on the outer side of the limit plate (15), the flexible circuit board (7) is connected to the limit plate (15) through the limit terminal (152), and the chip (6) is electrically connected to the flexible circuit board (7).

[0044] Example 2

[0045] A camera device has the magnet mounting structure as described in Example 1. In this embodiment, other structures of the camera device are the same as those in the prior art, so they will not be described in detail here.

[0046] Example 3

[0047] An electronic device has the camera device as described in Example 3. In this embodiment, other structures of the electronic device are the same as those in the prior art, so they are not described in detail here.

[0048] In the above embodiments, the directions or positional relationships indicated by terms such as “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside”, “outside”, “vertical” and “horizontal” are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solutions and the convenience of description. Therefore, they should not be understood as limitations of the present invention.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lens driving device, comprising a base (1), A carrier (2) disposed in the base (1), a coil (3) arranged along the outer side of the carrier (2), A magnet (4) is arranged outside the coil (3), Features: It also includes a detection magnet (5) arranged outside the coil (3), and a chip (6) arranged at the edge of the base (1); an annular groove (23) is arranged along the outer side surface of the carrier (2); the coil (3) is arranged in the annular groove (23) of the carrier (2); the carrier (2) is provided with a mounting groove (25), the mounting groove (25) is located outside the annular groove (23); the detection magnet (5) is arranged in the mounting groove (25), and the detection magnet (5) is located outside the coil (3).

2. A lens driving device according to claim 1, characterized in that: The base (1) comprises a plate-shaped body (11), a base through hole (12) is provided in the middle of the plate-shaped body (11), a limiting column (13) is provided at each of the four corners of the plate-shaped body (11), adjacent limiting columns (13) form a long installation position (14), and a limiting plate (15) is provided on each of a group of opposite sides of the plate-shaped body (11), the limiting plate (15) and the lateral limiting columns (13) form a short installation position (16) at the long installation position (14).

3. A lens driving device according to claim 1, characterized in that: The carrier (2) comprises a hollow body (21), a carrier through hole (22) is provided in the middle of the hollow body (21), the carrier (2) is arranged on a base (1), and the carrier through hole (22) is directly opposite to the base through hole (12), and a winding terminal (24) is provided on one side of the carrier (2).

4. A lens driving device according to claim 3, characterized in that: The two end portions of the coil (3) are respectively wound around a winding terminal (24).

5. A lens driving device according to claim 2, characterized in that: The magnet (4) is arranged along the edge of the base (1), and the magnet (4) comprises a long magnet (41) and a short magnet (42). The long magnet (41) is arranged in the long installation position (14), and the short magnet (42) is arranged in the short installation position (16).

6. A lens driving device according to claim 3, characterized in that: A limiting plate (15) is provided on the outer side of the detection magnet (5).

7. A lens driving device according to claim 6, characterized in that: A chip slot (151) is provided on the limit plate (15) outside the detection magnet (5), the chip (6) is arranged in the chip slot (151), a limit terminal (152) is provided on the outer side surface of the limit plate (15), the flexible circuit board (7) is connected to the limit plate (15) via the limit terminal (152), and the chip (6) is electrically connected to the flexible circuit board (7).

8. A photographic device, characterized in that: A lens driving device as described in any one of claims 1 to 7.

9. An electronic device, characterized in that: A photographic device as claimed in claim 8.

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