Frame of lens driving device

Abstract

The utility model discloses a frame of a lens driving device, the lens driving device comprises a carrier, a support, a shell, a base, a first driving mechanism and a second driving mechanism, the support is used for installing a first lens, the carrier is arranged below the support and used for installing a second lens, and the second lens and the first lens are coaxially arranged. The carrier is installed in the frame and movably connected with the frame, the shell and the base are matched to form a cavity, the carrier and the frame are installed in the cavity, the first driving mechanism drives the carrier to drive the second lens to move so as to change the distance between the second lens and the first lens, and the second driving mechanism drives the carrier and the frame to move in the cavity. The frame is provided with frame built-in metal, and the frame built-in metal is arranged in the frame and extends out of the upper surface of the frame to form at least one frame built-in metal fixing part.

Description

Technical Field

[0001] The utility model relates to the field of optics, in particular to a frame of a lens driving device. Background Art

[0002] In recent years, it has become common to install small cameras in portable devices such as mobile phones. Lens drive devices, which are the main components of the camera mechanism installed in such small portable devices, are used for automatic focusing of still or moving images, and require a small and high-precision lens drive function.

[0003] However, current lens driving devices usually have a lens installed on a carrier, and the carrier is driven by an electromagnetic driving mechanism or a piezoelectric driving mechanism to move the carrier along the optical axis, thereby changing the distance between the lens and the imaging lens to achieve a zoom effect.

[0004] With the popularization of terminals such as smart phones, how to optimize the lens drive mechanism built into these terminals to obtain better driving force while achieving better zoom and imaging quality is something that technical personnel in this field need to actively consider. Utility Model Content

[0005] The purpose of the utility model is to provide a frame of a lens driving device to solve at least part of the problems existing in the above-mentioned prior art.

[0006] In order to solve the above problems, according to one aspect of the utility model, a frame of a lens driving device is provided, wherein the lens driving device includes a carrier, a bracket, a shell, a base, a first driving mechanism and a second driving mechanism, wherein the bracket is used to install a first lens, the carrier is arranged below the bracket and is used to install a second lens, the second lens is coaxially arranged with the first lens, the carrier is installed in the frame and is movably connected to the frame, the shell and the base cooperate to form a chamber, the carrier and the frame are installed in the chamber, the first driving mechanism drives the carrier to drive the second lens to move so as to change the distance between the second lens and the first lens, the second driving mechanism drives the carrier and the frame to move in the chamber, and the frame is provided with a frame built-in metal, the frame built-in metal is arranged in the frame and extends out of the upper surface of the frame to form at least one frame built-in metal fixing portion.

[0007] In one embodiment, the frame is provided with a connecting column, the bracket is provided with a connecting hole in the built-in metal, and the connecting column cooperates with the connecting hole and extends into the connecting hole, or

[0008] The frame has a built-in metal with a connection hole, and the bracket has a connection column, which cooperates with the connection hole and extends into the connection hole.

[0009] In one embodiment, the connection hole and the connection column are connected by heat riveting, and the built-in metal sheet of the bracket and the built-in metal sheet of the frame are connected by welding.

[0010] In one embodiment, the upper surfaces of the four side portions of the frame are each provided with two connection columns, and the corresponding side portions of the built-in metal of the bracket are each provided with two connection holes.

[0011] In one embodiment, the frame built-in metal includes frame reinforcement sheets located at four sides and a connecting portion connecting two adjacent frame reinforcement sheets, wherein the connecting portion is connected to the top end of the frame reinforcement sheet.

[0012] In one embodiment, a reinforcement ring is integrally extended downward from the inner side of at least a portion of the connecting portion, and the reinforcement ring is arranged at a corner of the frame.

[0013] In one embodiment, the top end of the reinforcing sheet integrally extends upward to form a frame metal fixing portion, and the frame metal fixing portion is bent inward to form a metal sheet parallel to the built-in metal of the bracket.

[0014] In one embodiment, the inner walls of the four side portions of the frame form a driving magnet mounting portion, and the built-in metal of the frame is arranged on the outer side of the driving magnet.

[0015] In one embodiment, the frame built-in metal fixing portion is arranged on the outer side of the connecting column arranged on the frame.

[0016] In one embodiment, four corners of the upper surface of the frame are sunken to form a sunken portion, and the sunken portion is provided with an upper spring sheet mounting column.

[0017] The lens driving device using the frame of the utility model adopts an internal focusing solution and is provided with two lenses. The first lens is a fixed structure lens, and the second lens is a zoom lens (also called AF lens) installed on a carrier in the OIS anti-shake motor. The AF lens can perform anti-shake and focusing actions in the OIS anti-shake motor. The first lens is arranged on the upper end of the second lens and the two are arranged coaxially. After the second lens moves in the AF direction, the distance between the second lens and the first lens changes, thereby achieving the effect of adjusting the focused light. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a lens driving device according to an embodiment of the utility model.

[0019] Figure 2It is another three-dimensional diagram of the lens driving device of one embodiment of the utility model, excluding the housing.

[0020] Figure 3 It is a three-dimensional exploded view of a lens driving device according to an embodiment of the utility model.

[0021] Figure 4 It is another three-dimensional exploded view of the lens driving device of one embodiment of the utility model.

[0022] Figure 5 It is a three-dimensional diagram of a lens driving device according to an embodiment of the utility model.

[0023] Figure 6 yes Figure 5 3D exploded view of the lens drive device.

[0024] Figure 7 It is a three-dimensional diagram of a lens driving device according to an embodiment of the utility model.

[0025] Figure 8 It is a three-dimensional diagram of a carrier of a lens driving device according to an embodiment of the utility model.

[0026] Fig. 9 It is a three-dimensional diagram of a frame of a lens driving device according to an embodiment of the utility model.

[0027] Fig.10 It is a three-dimensional diagram of a carrier with a built-in metal sheet of a carrier of a lens driving device according to an embodiment of the utility model.

[0028] Fig.11 The present invention is a three-dimensional diagram of a frame of a lens driving device according to an embodiment of the present invention, wherein the frame has a built-in metal sheet.

[0029] Fig.12 It is a three-dimensional diagram of a carrier built-in metal sheet and a frame built-in metal sheet of a lens driving device of an embodiment of the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings to describe the preferred embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0031] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, 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.

[0032] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0033] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0034] The present application generally relates to a lens driving mechanism, which can be used in terminal products such as mobile phones and tablet computers to cooperate with lenses to realize functions such as taking pictures and recording videos. For the convenience of description, the present application introduces the concept of "optical axis" to indicate the propagation direction of light in an optical element. It is an abstract concept and does not refer to the existence of an axis in a physical sense. The direction along the optical axis is called the longitudinal direction.

[0035] It should be noted that the features shown in the drawings of the present application may belong to one embodiment or to different embodiments, as long as there is no conflict between these features. In order to save space, the present application may use the same drawing to illustrate different embodiments, that is, the same drawing of the present application may be used to reflect the features in different embodiments.

[0036] The utility model as a whole relates to a lens driving device, which technically adopts an internal focusing solution and is provided with two lenses, the first lens is a fixed structure lens, and the second lens is a zoom lens (also called AF lens) installed on a carrier in an OIS anti-shake motor, and the AF lens can perform anti-shake and focusing actions in the OIS anti-shake motor. Among them, the first lens is arranged on the upper end of the second lens and the two are arranged coaxially. After the second lens moves in the AF direction, the distance between the second lens and the first lens changes, thereby achieving the adjustment effect of focusing light.

[0037] Specific embodiments of the present utility model are described below with reference to the accompanying drawings.

[0038] In one embodiment, the lens driving device 100 of the utility model includes a bracket 10, a carrier 20, a frame 30 and a first driving mechanism, wherein the bracket 10 is used to install the first lens A, the carrier 20 is arranged below the bracket 10 and is used to install the second lens B, the second lens B is coaxially arranged with the first lens A, the carrier 20 is installed in the frame 30 and is movably connected to the frame 30, and the bracket 10 is fixedly connected to the frame 30. The first driving mechanism is used to drive the carrier 20 to drive the second lens B to move so as to change the distance between the second lens B and the first lens A to adjust the light, thereby achieving the effect of adjusting the focused light. It can be seen that compared with the conventional lens driving motor, the lens driving device of the utility model includes a stationary first lens A and a moving second lens B. Through the design of the dual lenses, focusing and light adjustment are more convenient and quick, with better imaging quality and better photo and video effects.

[0039] In one embodiment, the lens driving device 100 further includes a housing 40, a base 50, and a second driving mechanism. The housing 40 is provided with an opening 41. The first lens A extends from the opening 41 of the housing 40. The housing 40 cooperates with the base 50 to form a receiving chamber. The carrier 20 and the frame 30 are installed in the receiving chamber. The second driving mechanism is used to drive the carrier 20 and the frame 30 to move in the receiving chamber. Specifically, the second driving mechanism drives the carrier and the frame to move in the receiving chamber along a direction perpendicular to the optical axis, that is, along a direction perpendicular to the direction in which the first driving mechanism drives the carrier to move. Thus, the second driving mechanism drives the carrier and the frame to move, thereby achieving the effect of optical image stabilization. It can be seen that this embodiment achieves the functions of optical image stabilization and optical zoom on the basis of maintaining the dual-lens solution through the cooperation of the first driving mechanism and the second driving mechanism.

[0040] In one embodiment, a bracket built-in metal 11 is provided in the bracket 10, a frame built-in metal 31 is provided in the frame 30, and the bracket built-in metal 11 is fixedly connected to the frame built-in metal 31. That is, the fixed connection between the frame 30 and the bracket 10 is achieved by the fixed connection between the bracket built-in metal 11 and the frame built-in metal 31, and the fixed connection can be performed by welding, for example. By providing the frame built-in metal and the bracket built-in metal, the structural strength of the bracket and the frame is enhanced.

[0041] In one embodiment, the bracket built-in metal 11 is arranged in the bracket and extends out of the outer surface of the bracket 10 to form at least one bracket built-in metal fixing portion 111, the frame built-in metal 31 is arranged in the frame and extends out of the upper surface of the frame to form at least one frame built-in metal fixing portion 311, and the bracket built-in metal fixing portion 111 is fixedly connected to the frame built-in metal fixing portion 311. In other words, the bracket built-in metal extends from the side surface of the bracket to form the bracket metal fixing portion, the frame built-in metal extends from the upper surface of the frame to form the frame metal fixing portion, and the frame built-in metal fixing portion is bent inward to form a plane parallel to the bracket built-in metal, thereby increasing the contact area and facilitating fixing by welding or the like.

[0042] In one embodiment, the built-in metal fixing part 111 of the bracket is provided with a connecting hole 112, and the frame 30 is provided with a connecting column 32, which cooperates with the connecting hole 112 and extends into the connecting hole, or the built-in metal of the frame is provided with a connecting hole, and the bracket is provided with a connecting column, which cooperates with the connecting hole and extends into the connecting hole, and the connecting hole and the connecting column are connected by hot riveting, and the built-in metal sheet of the bracket and the built-in metal sheet of the frame are connected by welding.

[0043] If the built-in metal fixing part of the bracket and the built-in metal fixing part of the frame are directly laser welded and then fixed by glue, the built-in metal of the bracket will not be flattened during laser welding, so that the built-in metal of the bracket and the built-in metal of the frame are not completely flush, which will lead to welding failure or poor welding quality. However, by providing a connection hole in the built-in metal fixing part of the bracket and a connection column in the frame, before welding the built-in metal of the bracket and the built-in metal of the frame, the built-in metal of the bracket and the frame are first hot-riveted by the connection column and the connection hole, so that the built-in metal of the bracket and the built-in metal of the frame are completely flush, and then welding and glue fixing operations are performed, which effectively ensures the stability of the installation structure of the bracket and the second lens.

[0044] Refer to the following Fig. 9 , Fig.11 as well as Fig.12 The framework of an embodiment of the utility model is described in detail.

[0045] like Fig. 9 , Fig.11 as well as Fig.12 As shown, two connection posts 32 are respectively disposed on the upper surfaces of the four sides of the frame 30 , and two connection holes 112 are respectively disposed on the corresponding sides of the built-in metal of the bracket, and the connection posts 32 are matched with the connection holes 112 in a one-to-one correspondence.

[0046] In one embodiment, the frame built-in metal includes frame reinforcement pieces 33 located at four sides and a connecting portion 34 connecting two adjacent frame reinforcement pieces 33 , wherein the connecting portion 34 is connected to the top end of the frame reinforcement piece 33 .

[0047] In one embodiment, a reinforcement ring 35 is integrally extended downward from the inner side of at least a portion of the connecting portion 34 . The reinforcement ring 35 is arranged at a corner of the frame. The structural strength of the frame can be further improved by providing the reinforcement ring.

[0048] In one embodiment, the top end of the reinforcing sheet 33 integrally extends upward to form a frame built-in metal fixing portion 311 , and the frame built-in metal fixing portion 311 is bent inward to form a metal sheet parallel to the built-in metal of the bracket.

[0049] In one embodiment, the inner walls of the four sides of the frame form the driving magnet mounting portion 36, and the built-in metal of the frame is arranged on the outer side of the driving magnet.

[0050] Optionally, the frame built-in metal fixing portion 311 is arranged on the outer side of the connecting column 32 arranged on the frame.

[0051] In one embodiment, the four corners of the upper surface of the frame are sunken to form a sunken portion 37 , and the sunken portion 37 is provided with an upper spring installation column 371 , and the frame connection portion of the upper spring 60 is fixed on the upper spring installation column 371 .

[0052] In one embodiment, the first driving mechanism includes a first driving coil 22 arranged on the outside of the carrier 20 and a driving magnet 33 arranged on the frame. The driving magnet 33 cooperates with the first driving coil 22 and drives the carrier to move relative to the frame when the first driving coil is energized. Since the frame is fixedly connected to the bracket, when the carrier moves relative to the frame, the distance between the carrier and the first lens A changes, that is, the distance between the first lens and the second lens changes, thereby achieving an optical focusing adjustment effect.

[0053] Optionally, the driving magnets 33 are disposed on four sides of the frame 30 , and the first driving coil 22 is disposed around the outer circumference of the carrier 20 .

[0054] In one embodiment, the second driving mechanism includes a second driving coil 51 arranged on the base 50 and a driving magnet 33 arranged on the frame. The second driving coil 51 cooperates with the driving magnet 33 and drives the frame and the carrier to move relative to the base in the chamber when power is supplied, for example, in two directions perpendicular to the optical axis and perpendicular to each other, thereby realizing an optical image stabilization function.

[0055] That is to say, the driving magnets of the first driving mechanism and the second driving mechanism of the utility model can share a set of the same magnets, the second driving coil 51 cooperates with the driving magnet from the bottom, and the first driving coil 21 cooperates with the driving magnet from the inner side. Of course, those skilled in the art can understand that in other embodiments, the first driving mechanism and the second driving mechanism can also be provided with driving magnets separately. Except for requiring more magnets, these methods can also realize the technical solutions of the utility model.

[0056] For example, the second driving coil may be arranged in parallel on the base and include at least two coils, and the at least two coils cooperate with the driving magnet to achieve movement along two mutually perpendicular axes on a plane perpendicular to the optical axis.

[0057] In one embodiment, the lens driving device 100 further includes an upper spring 60, a lower spring 70 and a suspension wire 80, wherein the upper spring 60 and the lower spring 70 are respectively arranged at the top of the carrier 20 and the frame 30 and at the bottom of the carrier 30 and the frame 30, and the carrier and the frame are movably connected, that is, the upper spring 60 is arranged at the top of the carrier 20 and the frame 30, and the lower spring 70 is arranged at the bottom of the carrier 20 and the frame 30, and the relative movement of the carrier 20 relative to the frame 30 is realized by elastic deformation of the upper spring 60 and the lower spring 70, and the reset operation of the carrier is realized by the upper spring and the lower spring. The suspension wire 80 is arranged at the four corners of the base 50 and the frame 30 and the carrier 20 are suspended in the chamber to reduce the friction when the first driving mechanism is driven, that is, the suspension wire 80 is a rigid structure, and its strength is sufficient to support the frame and the carrier in the chamber. At the same time, the upper spring piece is also used to connect the power rod and the carrier and transmit current. Specifically, the upper end of the suspension wire 80 is electrically connected to the upper spring piece 60, and the lower end of the suspension wire 80 is electrically connected to the circuit in the base. The upper spring piece 60 is also electrically connected to the first drive coil 22. The suspension wire transmits current to the upper spring piece, and then transmits it to the first drive coil on the periphery of the carrier through the upper spring piece to supply power.

[0058] In one embodiment, the lens driving device further includes a driving circuit board 90, which is disposed on the base 50 and electrically connected to the second driving coil. The circuit board is preferably a flexible printed circuit board (FPC).

[0059] In another aspect of the present invention, a lens driving device is provided, including a bracket 10, a first lens A and an OIS driving motor C. The first lens A is arranged in the bracket 10, the OIS driving motor C is provided with a second lens B and includes a frame 30, and the bracket 10 is fixedly connected to the frame 30. During movement, when the carrier in the OIS driving motor moves along the optical axis, the distance between the second lens B mounted on the carrier and the first lens A changes, thereby achieving an optical focusing adjustment effect. The above-mentioned OIS driving motor can be an ordinary OIS driving motor, or it can be an OIS driving motor as described in the various embodiments of the present invention.

[0060] In one embodiment, a bracket built-in metal 11 is provided in the bracket 10, a frame built-in metal 31 is provided in the frame 30, and the bracket built-in metal 11 is fixedly connected to the frame built-in metal 31. That is, the fixed connection between the frame 30 and the bracket 10 is achieved by the fixed connection between the bracket built-in metal 11 and the frame built-in metal 31, and the fixed connection can be performed by welding, for example. By providing the frame built-in metal and the bracket built-in metal, the structural strength of the bracket and the frame is enhanced.

[0061] In one embodiment, the bracket built-in metal 11 is arranged in the bracket and extends out of the outer surface of the bracket 10 to form at least one bracket built-in metal fixing portion 111, the frame built-in metal 31 is arranged in the frame and extends out of the upper surface of the frame to form at least one frame built-in metal fixing portion 311, and the bracket built-in metal fixing portion 111 is fixedly connected to the frame built-in metal fixing portion 311. In other words, the bracket built-in metal extends from the side surface of the bracket to form the bracket built-in metal fixing portion, the frame built-in metal extends from the upper surface of the frame to form the frame built-in metal fixing portion, and the frame built-in metal fixing portion is bent inward to form a plane parallel to the bracket built-in metal, thereby increasing the contact area and facilitating fixing by welding or the like.

[0062] In one embodiment, the built-in metal fixing part 311 of the bracket is provided with a connecting hole 312, and the frame 30 is provided with a connecting column 32, which cooperates with the connecting hole 312 and extends into the connecting hole, or the built-in metal of the frame is provided with a connecting hole, and the bracket is provided with a connecting column, which cooperates with the connecting hole and extends into the connecting hole, and the connecting hole and the connecting column are connected by hot riveting, and the built-in metal sheet of the bracket and the built-in metal sheet of the frame are connected by welding.

[0063] If the built-in metal fixing part of the bracket and the built-in metal fixing part of the frame are directly laser welded and then fixed by glue, the built-in metal of the bracket will not be flattened during laser welding, so that the built-in metal of the bracket and the built-in metal of the frame are not completely flush, which will lead to welding failure or poor welding quality. However, by providing a connection hole in the built-in metal fixing part of the bracket and a connection column in the frame, before welding the built-in metal of the bracket and the built-in metal of the frame, the built-in metal of the bracket and the frame are first hot-riveted by the connection column and the connection hole, so that the built-in metal of the bracket and the built-in metal of the frame are completely flush, and then welding and glue fixing operations are performed, which effectively ensures the stability of the installation structure of the bracket and the second lens.

[0064] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A frame of a lens driving device, the lens driving device comprising a carrier, a bracket, a shell, a base, a first driving mechanism and a second driving mechanism, the bracket is used to install a first lens, the carrier is arranged below the bracket and is used to install a second lens, the second lens is coaxially arranged with the first lens, the carrier is installed in the frame and is movably connected to the frame, the shell and the base cooperate to form a chamber, the carrier and the frame are installed in the chamber, the first driving mechanism drives the carrier to drive the second lens to move so as to change the distance between the second lens and the first lens, and the second driving mechanism drives the carrier and the frame to move in the chamber, characterized in that The frame is provided with a frame built-in metal, which is arranged in the frame and extends out of the upper surface of the frame to form at least one frame built-in metal fixing part.

2. The frame according to claim 1, characterized in that The frame is provided with a connecting column, the bracket has a built-in metal with a connecting hole, and the connecting column cooperates with the connecting hole and extends into the connecting hole, or The frame has a built-in metal with a connection hole, and the bracket has a connection column, which cooperates with the connection hole and extends into the connection hole.

3. The frame according to claim 2, characterized in that The connection hole and the connection column are connected by hot riveting, and the built-in metal sheet of the bracket and the built-in metal sheet of the frame are connected by welding.

4. The frame according to claim 2, characterized in that The upper surfaces of the four side portions of the frame are each provided with two connection columns, and the corresponding side portions of the built-in metal of the bracket are each provided with two connection holes.

5. The frame according to claim 2, characterized in that The frame built-in metal comprises frame reinforcement sheets located at four sides and a connecting portion connecting two adjacent frame reinforcement sheets, wherein the connecting portion is connected to the top end of the frame reinforcement sheet.

6. The frame according to claim 5, characterized in that A reinforcement ring is integrally extended downward from the inner side of at least a portion of the connection portion, and the reinforcement ring is arranged at a corner of the frame.

7. The frame according to claim 6, characterized in that The top end of the reinforcing sheet integrally extends upward to form a frame metal fixing portion, and the frame metal fixing portion is bent inward to form a metal sheet parallel to the built-in metal of the bracket.

8. The frame according to claim 1, characterized in that The inner walls of the four side portions of the frame form a driving magnet mounting portion, and the built-in metal of the frame is arranged on the outer side of the driving magnet.

9. The frame according to claim 2, characterized in that The frame built-in metal fixing part is arranged on the outer side of the connecting column arranged on the frame.

10. The frame according to claim 2, characterized in that The four corners of the upper surface of the frame are sunken to form a sunken portion, and the sunken portion is provided with an upper spring sheet mounting column.

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