CN221124969U

CN221124969U - Lens driving device

Info

Publication number: CN221124969U
Application number: CN202322617394.2U
Authority: CN
Inventors: 请求不公布姓名; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2023-09-25
Filing date: 2023-09-25
Publication date: 2024-06-11
Anticipated expiration: 2033-09-25

Abstract

The utility model discloses a lens driving device, which comprises a carrier, a frame and a base, wherein a lens mounting hole is formed in the upper part of the carrier for mounting a lens, a first coil is arranged at the lower part of the carrier, a magnet group is arranged in the frame, the magnet group is matched with the first coil to drive the carrier to move along the direction of an optical axis, a second coil is arranged on the base and is matched with the magnet group to drive the frame to drive the carrier to move on a plane perpendicular to the optical axis, a base light hole is formed in the side part of the base, a prism mounting part is arranged at the lower part of the carrier, a carrier light hole correspondingly matched with the base light hole is formed in one side of the carrier, and light enters from the lens, passes through the carrier light hole and the base light hole after changing directions through a prism, and reaches an imaging chip. The lens driving device can lighten the thicknesses of the camera and the mobile phone.

Description

Lens driving device

Technical Field

The utility model relates to the technical field of optical image equipment, in particular to a lens driving device.

Background

With the massive popularization of smart phones, the application range of the mobile phone camera is larger and larger. However, with the development of the mobile phone towards light and thin, how to achieve better photographing effect on the basis of meeting the light and thin requirements of the mobile phone becomes a urgent problem for various mobile phone manufacturers. The driving device of the mobile phone camera has only a zooming function and has both zooming and anti-shake functions. For a motor having both zoom and anti-shake functions, commonly referred to as an OIS drive motor, OIS drive is required to achieve driving of three axes perpendicular to each other, wherein driving along the optical axis achieves a zoom function, and movement along two axes perpendicular to the optical axis achieves an optical anti-shake function. The current OIS driving motor basically transmits light along the optical axis direction after the light enters through the lens, and an imaging chip is arranged behind or on the base. However, in this way, since the light propagates along the same straight line, the need of realizing a large-scale zooming must result in a thicker overall thickness of the driving motor, and in order to meet the light and thin requirements of the mobile phone, the camera of the mobile phone must only be protruded out of the surface of the mobile phone, which not only affects the beauty, but also is unfavorable for protecting the camera.

Disclosure of utility model

The present utility model is directed to a lens driving device for solving the above-mentioned problems of the prior art.

In order to solve the above-described problems, according to an aspect of the present utility model, there is provided a lens driving apparatus including:

a carrier, the upper part of the carrier is provided with a lens mounting hole for mounting the lens, the lower part of the carrier is provided with a first coil,

The frame is provided with a magnet group, the lower part of the carrier is arranged in the frame, the magnet group is matched with the first coil to drive the carrier to move along the optical axis direction, and

The base is provided with a second coil and is matched with the magnet group to drive the frame to drive the carrier to move on a plane perpendicular to the optical axis, wherein

The side of base is equipped with the base and leads to the unthreaded hole, the lower part of carrier is equipped with prism installation department and is equipped with in one side with the corresponding complex carrier of base leads to unthreaded hole, light is followed after the camera lens gets into the back is passed through prism changes the direction and passes through carrier leads to unthreaded hole and base leads to unthreaded hole and reaches the imaging chip.

In one embodiment, the base is further provided with a driving circuit board, the second coil is arranged in the driving circuit board, the frame is arranged above the driving circuit board, and the magnet group is located above the second coil and correspondingly matched with the second coil.

In one embodiment, the lens driving device further comprises a housing, an upper reed, a lower reed and a plurality of suspension wires, wherein the housing and the base are matched to form a containing cavity, the upper reed movably connects the top end of the frame with the top end of the lower portion of the carrier, the lower reed movably connects the bottom end of the frame with the bottom end of the carrier, and the lower ends of the plurality of suspension wires are fixed on the base and support the frame and the carrier in the containing cavity to form a suspended state.

In one embodiment, the lens driving device further includes a control IC assembly, the frame is provided with a frame built-in circuit, the control IC assembly is disposed at one side portion of the frame, after the external circuit is connected to the driving circuit board, one circuit is transmitted to the second coil and supplies power to the second coil, and the other circuit is transmitted to the control IC assembly through the suspension wire, the upper reed and the frame built-in circuit, and then is transmitted to the lower reed through the frame built-in circuit, and is transmitted to the first coil through the lower reed and supplies power to the first coil.

In one embodiment, the lens driving device further comprises a prism mounting plate, wherein a mounting hole is formed in the bottom end of the base to mount the prism mounting plate, and the prism is mounted on the prism mounting plate.

In one embodiment, a baffle is further arranged on one side of the base, the baffle is provided with a base light-passing hole, a substrate and an imaging circuit board are arranged on the outer side of the base light-passing hole, the imaging chip is arranged on the inner surface of the substrate and is opposite to the base light-passing hole, and the imaging circuit board is arranged on the outer surface of the substrate and is electrically connected with the imaging circuit board.

In one embodiment, a third position sensor is disposed on one side of the control IC assembly, an induction magnet matched with the third position sensor is disposed on the side of the carrier, the displacement of the lens in the optical axis direction is detected by the cooperation of the third position sensor and the induction magnet, and

The base bottom is equipped with first position sensor and second position sensor, first position sensor and second position sensor with the magnetite group cooperation is in order to detect the displacement of frame with the carrier is in two mutually perpendicular directions on the plane of perpendicular to optical axis.

In one embodiment, a light-shielding notch is formed on one side of the frame to correspond to the base light-transmitting hole and the carrier light-transmitting hole, and the control IC component is arranged above the side part of the frame opposite to the light-shielding notch; optionally, a magnet mounting groove is formed in the side portion of the frame to mount the magnet group.

In one embodiment, the upper part of the carrier forms a cylindrical shape, and the lower part of the carrier forms a prismatic shape, opposite sides of the prismatic shape being provided with a set of the first coils each.

In one embodiment, one of the sides of the housing is open to form an open side, and the imaging circuit board and the substrate are disposed on the open side.

Compared with the conventional lens driving device, the lens driving device can change the light transmission path, so that the propagation distance of light in one direction is changed, the thicknesses of a camera and a mobile phone can be reduced, and longer-distance zooming is realized.

Drawings

Fig. 1 is an exploded perspective view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 2 is another exploded perspective view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 3 is another exploded perspective view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 4 is a perspective view of a base of one embodiment of the present utility model.

Fig. 5 is a perspective view of a frame of one embodiment of the present utility model.

Fig. 6 is a perspective view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 7 is a perspective view of a frame of one embodiment of the present utility model.

Fig. 8 is a perspective view of a base of one embodiment of the present utility model.

Fig. 9 is a cross-sectional view of a lens driving apparatus according to an embodiment of the present utility model.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present utility model will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

In the following description, for the purposes of explanation of 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 an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with the present 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, 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 purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The present application relates generally to a lens driving apparatus which can be used in terminal products such as mobile phones, tablet computers, etc. to realize photographing, video recording, etc. For convenience of description, the present application introduces the concept of "optical axis" to denote the direction of propagation of light rays within an optical element, which is an abstract concept, and does not mean that there is one physical axis, and the direction along the optical axis is referred to as the longitudinal direction.

It should be noted that features shown in the drawings of the present application may belong to one embodiment or may belong to different embodiments, as long as there is no conflict between the features. For the sake of brevity, the application may be illustrated in different embodiments with the same drawing, i.e. the same drawing of the application may be used to embody features of different embodiments.

Fig. 1 to 3 are different perspective exploded views of a lens driving device according to an embodiment of the present utility model, fig. 4 is a perspective view of a chassis according to an embodiment of the present utility model, fig. 5 is a perspective view of a frame according to an embodiment of the present utility model, fig. 6 is a perspective view of a lens driving device according to an embodiment of the present utility model, fig. 7 is a perspective view of a frame according to an embodiment of the present utility model, fig. 8 is a perspective view of a chassis according to an embodiment of the present utility model, and fig. 9 is a cross-sectional view of a lens driving device according to an embodiment of the present utility model.

Referring to fig. 1 to 9, a lens driving apparatus 100 according to an embodiment of the present application includes a carrier 10, a frame 20, and a base 30, wherein a lens mounting hole 11 is formed at an upper portion of the carrier 10 to mount a lens, a first coil 11 (also referred to as an AF coil) is provided at a lower portion of the carrier 10, the frame 20 is provided with a magnet group 21, the lower portion of the carrier 10 is disposed in the frame 20, and the magnet group 21 cooperates with the first coil 11 to drive the carrier 10 to move in an optical axis direction, and since the lens is fixedly mounted in the carrier 10, the movement of the carrier 10 will drive the lens to move, thereby realizing an optical zoom function. The base 30 is provided with a second coil (not shown) which cooperates with the magnet set 21 on the frame 20 to drive the frame 20 to move on a plane perpendicular to the optical axis, for example, along mutually perpendicular X-axis and Y-axis on a plane perpendicular to the optical axis. The side of the base 30 is also provided with a base light-passing hole 31, the lower part of the carrier 10 is provided with a prism mounting part 12 for mounting the prism a and a carrier light-passing hole 13 correspondingly matched with the base light-passing hole 31 on one side, and light enters from the lens along the vertical direction and then passes through the carrier light-passing hole 13 and the base light-passing hole 31 to reach the imaging chip 37 after passing through the prism to change the direction.

It can be seen that the lens driving apparatus of the present utility model changes the light transmission path through the prism, thereby changing the propagation distance of light in one direction, and thus can reduce the thickness of the camera and the mobile phone, compared with the conventional lens driving apparatus.

In one embodiment, the base 30 is further provided with a driving circuit board 32, the driving circuit board 32 is internally provided with the second coils (not shown), the frame 20 is arranged above the driving circuit board 32, the magnet group 21 is located above the second coils and correspondingly matched with the second coils, and after current is introduced into the second coils, the second coils are subjected to the lorentz force in the magnetic field formed by the magnet group, so that the frame 20 can be driven to drive the carrier 10 to move on a plane perpendicular to the optical axis, and by arranging a plurality of second coils and adjusting the positions of the second coils, the frame 20 can be driven to move along mutually perpendicular X and Y axes on the plane perpendicular to the optical axis, so as to realize the optical anti-shake function.

In one embodiment, the lens driving device 100 further includes a housing 40, an upper reed 50, a lower reed 60, and a plurality of suspension wires 70, wherein the housing 40 and the base 30 cooperate to form a receiving chamber, the upper reed 50 movably connects the top end of the frame 20 with the top end of the lower portion of the carrier 10, the lower reed 60 movably connects the bottom end of the frame 20 with the bottom end of the carrier 10, and the lower ends of the plurality of suspension wires 70 are fixed at four corners of the base 30 and support the frame 20 and the carrier 10 in the receiving chamber to form a suspended state. The upper reed 50 and the lower reed 60 are mainly used for resetting operation of a frame and a carrier, the upper reed 50 is also connected with the base 30 through suspension wires 70, the frame 20 and the carrier 10 are completely supported on the base by four suspension wires to be in a suspended state so as to reduce the friction force during driving, and meanwhile, after driving, the elastic effect of the suspension wires can play a certain role in resetting.

In one embodiment, the lens driving apparatus 100 further includes a control IC assembly 80, the frame 20 is provided with a frame built-in circuit (not shown), the control IC assembly 80 is disposed at one side of the frame 20, after the external circuit is connected to the driving circuit board 32, one circuit is transmitted to the second coil and supplies power to the second coil, and the other circuit is transmitted to the control IC assembly 80 through the suspension wire 70, the upper reed 50, the frame built-in circuit, and then is transmitted to the lower reed 60 through the frame built-in circuit, and is retransmitted to the first coil 11 through the lower reed 60 and supplies power to the first coil 11.

In one embodiment, the lens driving apparatus 100 further includes a prism mounting plate 33, the prism mounting plate 33 includes a bottom plate 331 and a side plate 332, the bottom plate 331 and the side plate 332 are respectively matched with the bottom surface and the side surface of the prism a, the bottom end of the base 30 is provided with a mounting hole 34 for mounting the prism mounting plate 33, and the prism a is mounted on the prism mounting plate 33.

In one embodiment, a baffle 38 is further disposed on one side of the base, the baffle 38 is provided with a base light-passing hole 31, a substrate 35 and an imaging circuit board 36 are disposed on the outer side of the baffle 38, an imaging chip 37 is disposed on the inner surface of the substrate 35, the imaging chip 37 is disposed opposite to the base light-passing hole 31, the imaging circuit board 36 is disposed on the outer surface of the substrate 35, and the imaging circuit board 36 is electrically connected with the imaging chip 37. Optionally, the base 30 is provided with base built-in wiring (not shown), and the imaging circuit board 36 is powered by the base built-in wiring and transmits current to the imaging chip 37. Light entering the lens is reflected by the prism and then transmitted to the imaging chip, so that the light transmission operation of the imaging chip is realized. Thereby changing the thickness of the light transmission path and reducing the thicknesses of the camera and the mobile phone.

In one embodiment, a third position sensor 21 is provided on one side of the control IC module 80, a sensing magnet 14 cooperating with the third position sensor is provided on the side of the carrier 10, and displacement of the lens in the optical axis direction is detected by cooperation of the third position sensor 21 and the sensing magnet 14.

The bottom end of the base 30 is provided with a first position sensor 38 and a second position sensor 39, and the first position sensor 38 and the second position sensor 39 cooperate with the magnet group 31 to detect displacement of the frame and the carrier in two directions perpendicular to each other on a plane perpendicular to the optical axis. It should be noted that instead of the magnet group 31, a separate induction magnet corresponding to the first position sensor 38 and the second position sensor 39 may be provided on the frame.

Optionally, a light shielding notch 22 is disposed on one side of the frame 20 to correspond to the base light hole 31 and the carrier light hole 13, and the control IC assembly 80 is disposed above a side of the frame opposite to the light shielding notch 22, and optionally, a magnet mounting groove 23 is disposed on the side of the frame to mount the magnet set 31.

Alternatively, the upper part of the carrier 10 forms a cylindrical shape, and the lower part of the carrier forms a prismatic shape, opposite sides of the prismatic shape being provided with a set of first coils 11 each.

In one embodiment, one of the sides of the housing 40 is open to form an open side 41, and the imaging circuit board 36 and the substrate 35 are disposed on the open side 41 and close the open side 41.

While the preferred embodiments of the present utility model have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the utility model. Such equivalents are also intended to fall within the scope of the utility model as defined by the following claims.

Claims

1. A lens driving apparatus, characterized in that the lens driving apparatus comprises:

2. The lens driving apparatus according to claim 1, wherein the base is further provided with a driving circuit board, the second coil is disposed in the driving circuit board, the frame is disposed above the driving circuit board, and the magnet group is disposed above the second coil and is correspondingly matched with the second coil.

3. The lens driving apparatus according to claim 2, further comprising a housing, an upper reed, a lower reed and a plurality of suspension wires, wherein the housing cooperates with the base to form a housing chamber, the upper reed movably connects the top end of the frame with the top end of the lower portion of the carrier, the lower reed movably connects the bottom end of the frame with the bottom end of the carrier, and the lower ends of the plurality of suspension wires are fixed on the base and support the frame and the carrier in the housing chamber to form a suspended state.

4. A lens driving apparatus according to claim 3, further comprising a control IC assembly provided with a built-in frame wiring, said control IC assembly being provided on one of side portions of said frame, one wiring being transmitted to and supplying power to said second coil after an external circuit is connected to said driving circuit board, the other wiring being transmitted to said control IC assembly via said suspension wire, upper reed, built-in frame wiring, and then to said lower reed via said built-in frame wiring, and being transmitted to and supplying power to said first coil via said lower reed.

5. The lens driving apparatus according to claim 1, further comprising a prism mounting plate, wherein the base bottom end is provided with a mounting hole to mount the prism mounting plate, and the prism is mounted on the prism mounting plate.

6. A lens driving device according to claim 3, wherein a baffle is further provided on one side of the base, the baffle is provided with the base light-passing hole, a substrate and an imaging circuit board are provided on the outer side of the base light-passing hole, the imaging chip is provided on the inner surface of the substrate, the imaging chip is arranged opposite to the base light-passing hole, and the imaging circuit board is arranged on the outer surface of the substrate and electrically connected with the imaging circuit board.

7. The lens driving apparatus according to claim 4, wherein a third position sensor is provided on one side of the control IC assembly, an induction magnet is provided on a side of the carrier in cooperation with the third position sensor, displacement of the lens in the optical axis direction is detected by cooperation of the third position sensor with the induction magnet, and

8. The lens driving apparatus according to claim 4, wherein a light shielding gap is provided at one side of the frame to correspond to the base light passing hole and the carrier light passing hole, and the control IC assembly is provided above a side of the frame opposite to the light shielding gap; optionally, a magnet mounting groove is formed in the side portion of the frame to mount the magnet group.

9. The lens driving apparatus according to claim 1, wherein an upper portion of the carrier forms a cylindrical shape, and a lower portion of the carrier forms a prismatic shape, opposite sides of the prismatic shape being provided with a set of the first coils, respectively.

10. The lens driving apparatus according to claim 6, wherein one of side portions of the housing is opened to form an opened side portion, and the imaging circuit board and the substrate are disposed at the opened side portion.