CN210038293U

CN210038293U - Lens driving mechanism

Info

Publication number: CN210038293U
Application number: CN201920664772.3U
Authority: CN
Inventors: 彭坤; 林聪�; 刘富泉; 其他发明人请求不公开姓名
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-02-07
Anticipated expiration: 2029-05-10

Abstract

The utility model discloses a camera lens actuating mechanism, including carrier, frame, magnetite for the coil, base, magnetite, translation coil and TMR sensor for the sensor. The carrier is used for mounting a lens and is wound with a coil, the frame is provided with a central opening, magnets for the coil are mounted on the frame and arranged around the central opening, the carrier is arranged in the central opening and enables the carrier to move relative to the frame along the Z-axis direction, the translational coil is mounted on the base and matched with the magnets for the coil and used for driving the frame and the carrier to move in a two-dimensional displacement mode along the X-axis direction and the Y-axis direction, the X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other, the magnets for the sensor are mounted at the bottom of the frame, and the TMR sensor is mounted on the base and corresponds to the magnets for the sensor and the magnets for the coil, so. The utility model discloses cancelled side FPC, the structure is simplified, and the technology is simplified, and product reliability is higher.

Description

Lens driving mechanism

Technical Field

The utility model relates to an optical imaging equipment technical field, concretely relates to camera lens actuating mechanism.

Background

Along with smart mobile phone's a large amount of popularizations, cell-phone camera's range of application is bigger and bigger, however, cell-phone camera's sensor is mostly laid in the module outside the motor at present, side FPC adopts flexible circuit board, produce perk scheduling problem, the sensor detects unstably, side FPC adopts flexible circuit board simultaneously, the installation unevenness can influence actual motion stroke, the vertical direction motion part of middle carrier, in the coil on the carrier is retransmitted to last reed through the power transmission of suspension wire with bottom FPC, when the motor receives the impact or after the operation of permanent time, suspension wire reliability step-down, the easy problem of appearing fracture etc. leads to whole motor to become invalid.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lens actuating mechanism to solve the problem that exists among the above-mentioned prior art.

In order to solve the above problems, according to one aspect of the present invention, there is provided a lens driving mechanism including a carrier, a frame, a magnet for coil, a base, a magnet for sensor, a translation coil, and a TMR sensor,

the carrier is used for mounting a lens and is wound with a coil, the frame is provided with a central opening, the coil magnet is mounted on the frame and arranged around the central opening, the carrier is arranged in the central opening and can move relative to the frame along the Z-axis direction,

the translation coil is arranged on the base and matched with the magnet for the coil to drive the frame and the carrier to move along two-dimensional displacement in the directions of an X axis and a Y axis, wherein the X axis, the Y axis and the Z axis are mutually vertical,

the TMR sensor is mounted on the base and corresponds to the sensor magnet and the coil magnet, thereby detecting the movement of the carrier in the X-axis, the Y-axis, and the Z-axis.

In one embodiment, the side of the carrier is provided with a protrusion, the bottom of the protrusion is provided with a mounting hole, and the sensor is mounted in the mounting hole by a magnet.

In one embodiment, the lens driving mechanism further includes an upper spring and a lower spring, the lower spring is fixedly connected to the lower surfaces of the frame and the carrier, and the upper spring is fixedly connected to the upper surfaces of the frame and the carrier.

In one embodiment, the sensor magnets are mounted on three sides of the frame, wherein two sensor magnets on adjacent sides cooperate with two TMR sensors on the base to monitor the motion of the carrier in the X-axis and the Y-axis.

In one embodiment, three translation coils are arranged on the base, and the three translation coils are respectively located below the magnets for the sensors on the three side portions so as to drive the carrier and the lens to move on the X axis and the Y axis.

In one embodiment, the lens driving mechanism further includes a base embedded metal sheet disposed in the base to reinforce the strength of the base.

In one embodiment, the lens driving mechanism further comprises a cover plate, and the cover plate encapsulates the translation coil in the base.

In one embodiment, the lens driving mechanism further includes suspension wires disposed at four corners of the lens driving mechanism and electrically connecting the chassis and the upper spring.

In one embodiment, the four corners of the frame are also provided with suspension wire holes through which the suspension wires pass and suspend the frame from the base.

In one embodiment, the lens driving mechanism further comprises a housing, and the housing is matched with the base to enclose the parts of the lens driving mechanism except the housing and the base in a space defined by the housing and the base.

Compared with the prior art, the utility model discloses cancelled side FPC, the structure is simplified, installs triaxial sensor in the bottom simultaneously, has simplified technology for product reliability is higher.

Drawings

Fig. 1 is an exploded perspective view of the lens driving mechanism of the present invention;

fig. 2 is a perspective view of the carrier of the present invention;

fig. 3 is a top view of the lens driving mechanism of the present invention, in which the housing has been removed;

fig. 4 is a front view of the lens driving mechanism of fig. 3;

fig. 5 is a sectional view of the lens driving mechanism of fig. 3;

fig. 6 is a bottom view of the lens driving mechanism of the present invention;

fig. 7 is a sectional view of the lens driving mechanism of fig. 6; and

fig. 8 is another sectional view of the lens driving mechanism of fig. 6.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

The utility model relates to a camera lens actuating mechanism generally, including carrier, frame, magnetite for the coil, base, magnetite for the sensor, translation coil and TMR sensor. The carrier is used for mounting the lens and is wound with a coil, the frame is provided with a central opening, the coil is mounted on the frame by using magnets and is arranged around the central opening, and the carrier is arranged in the central opening and can move relative to the frame along the Z-axis direction. The translation coil is arranged on the base and matched with the magnet for the coil, and is used for driving the frame and the carrier to perform two-dimensional displacement motion along the X-axis direction and the Y-axis direction, wherein the X-axis direction, the Y-axis direction and the Z-axis direction are mutually vertical. The TMR sensor is mounted on the base and corresponds to the sensor magnet and the coil magnet, thereby detecting the movement of the carrier in the X-axis, Y-axis and Z-axis.

The lens driving mechanism of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is an exploded perspective view of a lens driving mechanism according to an embodiment of the present invention. As shown in fig. 1, the lens driving mechanism includes a housing 10, an upper spring 20, a frame 30, a coil magnet 40, a carrier 50, a lower spring 21, a base 60, a cover 61, a base embedded metal sheet 62, a driving coil 63, a TMR sensor 70, a sensor magnet 80, and a suspension 90.

Fig. 2 is a perspective view of the carrier of the present invention, and fig. 3 is a top view of the lens driving mechanism of the present invention, in which the housing has been removed; fig. 4 is a front view of the lens driving mechanism of fig. 3; fig. 5 is a sectional view of the lens driving mechanism of fig. 3; fig. 6 is a bottom view of the lens driving mechanism of the present invention; fig. 7 is a sectional view of the lens driving mechanism of fig. 6; and fig. 8 is another sectional view of the lens driving mechanism of fig. 6.

As shown in fig. 1 to 8, the frame 30 has a central opening, and a coil magnet 40 is fixedly placed on each of three side portions surrounding the central opening. The outer diameter of the carrier 50 is matched to the size of the central opening of the frame 30 so that the carrier 50 can be movably placed in the central opening of the frame 30, and the magnets 40 for the coil surround three sides of the carrier 50. When the coil 40 is energized, the carrier 50 can move in the optical axis direction, i.e., the Z-axis direction, due to the electromagnetic induction effect, thereby achieving the function of optical zooming.

Referring to fig. 5, the middle of the carrier 50 is provided with a central opening 54 occupying a large portion of the carrier 50, the central opening 54 being for mounting a lens. The side of the carrier 50 is provided with a projection 51, the bottom of the projection 51 is provided with a mounting hole, and the sensor magnet 80 is mounted in the mounting hole. Coil mounting portions 52 are provided on two side portions of the carrier 50 adjacent to the side portion where the projecting portion 51 is located, and a coil 53 is wound around the coil mounting portions 52 and corresponds to the two coil magnets 40 mounted in the frame 30, so that the carrier 50 is driven to move in a direction perpendicular to the optical axis by electromagnetic induction with the magnets 40 when energized.

With continued reference to fig. 1-8, the lower spring 21 is fixedly attached to the lower surface of the frame 30 and the carrier 50, and the upper spring 20 is fixedly attached to the upper surface of the frame 30 and the carrier 50. Three translation coils 63 are arranged on the upper surface of the base 60, and the three translation coils 63 are respectively located below three side portions of the frame 30 where the magnets 40 for sensors are installed and are matched with the three magnets 40 for sensors, so that when the translation coils 63 are electrified, electromagnetic induction is generated between the translation coils 63 and the magnets 40 for sensors to drive the carrier 30 and a lens (not shown) to move in the directions of an X axis and a Y axis perpendicular to an optical axis (namely a Z axis), and the optical anti-shake function is realized.

As shown in fig. 1, the lens driving mechanism 100 further includes a base embedded metal sheet 62, and the base embedded metal sheet 62 is disposed in the base 60 to enhance the strength of the base 60. The cover plate 61 encloses the translation coil 63 in a space defined by the base plate and the cover plate 61 from above the base plate 60.

Three TMR sensors 70 are mounted at the bottom of the base 60, wherein two TMR sensors 70 are matched with the sensor magnets 40, so that the actions of the carrier 50 on the X axis and the Y axis are monitored, the actions are fed back to a control module (not shown), and the control module adjusts the current in the translation coil 63 according to the actions of the carrier 50, thereby realizing the optical anti-shake function. The TMR sensor 70 is located below and coupled to the sensor magnet 80 mounted on the carrier, so as to detect the movement of the carrier 50 in the Z-axis direction, and feed the movement back to a control module (not shown), which adjusts the magnitude of the current in the coil 40 accordingly.

The carrier 50 is provided with suspension wire holes 55 at four corners thereof, and the frame 30 is also provided with suspension wire holes 33 at corresponding positions at four corners thereof. The lower ends of the suspension wires 90 are connected to the base insert metal plate 62 of the base 60, and the upper ends of the suspension wires 90 pass through the suspension wire holes 55 of the carrier 50 and the four suspension wire holes of the frame 30 and are connected to the upper leaf, thereby suspending the carrier 50 and the frame 30 from the base 30. The housing 10 and the mount 60 cooperate to enclose the entire lens driving mechanism except for the housing and the mount in a space defined by the housing and the mount.

The utility model discloses cancelled side FPC, the structure is simplified, simultaneously in bottom installation triaxial sensor, has simplified technology for product reliability is higher.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. A lens driving mechanism is characterized in that the lens driving mechanism comprises a carrier, a frame, a magnet for a coil, a base, a magnet for a sensor, a translation coil and a TMR sensor,

2. The lens driving mechanism according to claim 1, wherein a side portion of the carrier is provided with a projection, a bottom portion of the projection is provided with a mounting hole, and the sensor is mounted in the mounting hole with a magnet.

3. The lens driving mechanism according to claim 1, further comprising an upper spring and a lower spring, wherein the lower spring is fixedly connected to the lower surfaces of the frame and the carrier, and the upper spring is fixedly connected to the upper surfaces of the frame and the carrier.

4. A lens driving mechanism according to claim 1, wherein the sensor magnets are mounted on three sides of the frame, and wherein two sensor magnets located on adjacent sides cooperate with two TMR sensors on the base to monitor the movement of the carrier in the X-axis and the Y-axis.

5. The lens driving mechanism according to claim 4, wherein three translational coils are arranged on the base, and the three translational coils are respectively located below the magnets for the sensors on the three side portions so as to drive the carrier and the lens to move on the X axis and the Y axis.

6. The lens driving mechanism according to claim 1, further comprising a base embedded metal sheet provided in the base to reinforce the strength of the base.

7. The lens driving mechanism as claimed in claim 1, further comprising a cover plate enclosing the translation coil within a base.

8. The lens driving mechanism according to claim 3, further comprising suspension wires provided at four corners of the lens driving mechanism and electrically connecting the chassis and the upper spring.

9. The lens driving mechanism according to claim 8, wherein the frame is also provided at four corners thereof with suspension holes through which the suspension wires pass and suspend the frame from the base.

10. The lens driving mechanism according to claim 1, further comprising a housing which is engaged with the chassis to enclose a portion of the lens driving mechanism other than the housing and the chassis within a space defined by the housing and the chassis.