CN220367461U

CN220367461U - Lens driving mechanism and carrier thereof

Info

Publication number: CN220367461U
Application number: CN202322338755.XU
Authority: CN
Inventors: 鲍和平; 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: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-01-19
Anticipated expiration: 2033-08-30

Abstract

The utility model discloses a lens driving mechanism and a carrier thereof, wherein the carrier comprises an annular frame, a silica gel layer and a first coil, the annular frame is used for installing a lens, a guide groove is arranged on the radial outer side of the annular frame, and the guide groove extends along the optical axis direction of the lens and penetrates through the annular frame. The silica gel layer is stacked on the top surface and/or the bottom surface of the annular frame. The first coil is connected with the annular frame.

Description

Lens driving mechanism and carrier thereof

Technical Field

The present utility model relates to the field of lens driving technologies, and in particular, to a lens driving mechanism and a carrier thereof.

Background

In recent years, along with the development of technology, many electronic devices have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user.

In practice, in order to accommodate photographing of various scenes, the lens needs to be continuously focused, and in the prior art, a lens driving mechanism is generally used to drive the lens to move along the optical axis direction so as to adjust the focal length.

In the prior art, the lens driving mechanism comprises a frame, a carrier, an upper reed, a lower reed and a base, wherein the carrier is provided with a coil and can be movably arranged in the frame, and the carrier is used for installing a lens. The upper reed is elastic and connected to the top of the frame and the top of the carrier, the lower reed is also elastic and connected to the bottom of the carrier and the bottom of the frame, and the upper reed and the lower reed movably connect the carrier in the frame. The frame is movably arranged above the base through a plurality of suspension wires and can move along the direction perpendicular to the optical axis of the lens so as to prevent the lens from shaking. The carrier is arranged in the frame and can move along the optical axis direction of the lens so as to adjust the focal length of the lens.

However, in the prior art, the carrier rotates or tilts when moving along the optical axis direction, so that the focusing cannot be stabilized, the shooting is affected, and noise is generated when the carrier moves, so that the carrier needs to be improved, and a more stable carrier structure is developed.

Disclosure of Invention

The present utility model is directed to a lens driving mechanism and a carrier thereof, which solve the above problems.

To solve the above technical problems, embodiments of the present utility model provide a carrier, which includes:

the annular frame is used for mounting a lens, a guide groove is formed in the radial outer side of the annular frame, and the guide groove extends along the optical axis direction of the lens and penetrates through the annular frame;

the silica gel layer is stacked on the top surface and/or the bottom surface of the annular frame; and

and the first coil is connected with the annular frame.

In one embodiment, the annular frame comprises two first sides, and the two first sides are parallel and oppositely arranged;

the first coil is connected with one of the first sides and is positioned radially outside the first side;

the two silica gel layers are respectively arranged on the top surfaces of the two first sides;

the guide groove and the first coil are located on the same first side.

In one embodiment, a mounting groove is formed on the radial outer side of the first side, and the first coil is positioned in the mounting groove;

the guide groove is formed by recessing the radial outer side of the first side and is arranged at intervals with the mounting groove.

In one embodiment, the two guide grooves are respectively positioned at two ends of the mounting groove and are spaced from the mounting groove.

In one embodiment, further comprising:

the conductive piece is embedded in the annular frame and is electrically connected with the first coil; and

the circuit board is connected with the annular frame, is provided with a control chip and is electrically connected with the conductive piece and the first coil.

The present utility model also relates to a lens driving mechanism comprising:

the carrier described above;

the base is positioned below the carrier and is arranged at intervals with the carrier, and the base is provided with a second coil;

the bracket is positioned at the top of the base and is in rolling connection with the base;

the frame surrounds the radial outer side of the carrier and is positioned at the top of the bracket, the frame is in rolling connection with the bracket and is provided with a magnet group, at least one part of the magnet group is opposite to the first coil and matched with the first coil to drive the carrier to move along the optical axis direction, and at least one other part of the magnet group is matched with the second coil to drive the frame to move along the radial direction;

at least one spring, said spring having elasticity and being connected to said frame and said carrier; and

and the shell covers the outside of the frame and the carrier and is connected with the base.

In one embodiment, the carrier further comprises a conductive member, at least a portion of which is embedded within the annular frame and electrically connected to the first coil;

the base includes:

the bottom plate is in rolling connection with the bracket, and a built-in circuit is arranged in the bottom plate; the second coil is positioned in the bottom plate; and

the limiting columns extend from the top surface of the bottom plate and are respectively positioned at the radial outer sides of the frame and the bracket;

at least a portion of the built-in line extends to the top surface of the limit post and is electrically connected with the reed, and the reed is electrically connected with the conductive member.

In one embodiment, a first roller is further disposed on the inner side of the frame, an axis of the first roller is parallel to the optical axis direction, and at least a part of the first roller is located in the guide groove.

In one embodiment, the guide groove and the first coil are located on the same side of the annular frame.

In one embodiment, the top surface of the bottom plate is provided with a plurality of second rollers, and the axes of the second rollers are perpendicular to the optical axis direction and are used for supporting the bracket to move;

the top surface of support is equipped with a plurality of third roller, the axis of second roller with the optical axis direction is two liang perpendicular, and a plurality of third roller is used for supporting the frame removes.

According to the utility model, the carrier is provided with the silica gel layer and the guide groove, so that the stable operation of the carrier can be ensured, the noise can be reduced, and the utility model has a huge market prospect.

Drawings

Fig. 1 to 3 are exploded views of a lens driving mechanism in an embodiment of the present utility model.

Fig. 4 is a perspective view of the carrier, frame, base and bracket of the embodiment of fig. 1.

Fig. 5 is an exploded view of the carrier in the embodiment shown in fig. 1.

Fig. 6 is a perspective view of the base and bracket of the embodiment of fig. 1.

Fig. 7 is a perspective view of the frame and carrier of the embodiment of fig. 1.

Reference numerals: 100. a lens driving mechanism; 1. a base; 11. a second roller; 12. a second coil; 13. a bottom plate; 14. a limit column; 2. a bracket; 21. a third roller; 3. a frame; 31. a first set of magnets; 32. a first roller; 4. a carrier; 401. a first side; 402. a second side; 403. a third side; 41. an annular frame; 42. a circuit board; 43. a control chip; 44. a first coil; 45. a mounting groove; 46. a guide groove; 47. a conductive member; 5. a reed; 6. a housing;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

The following detailed description of various embodiments of the present utility model will be provided in connection with the accompanying drawings to provide a clearer understanding of the objects, features and advantages of the present utility model. 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.

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.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

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 utility model relates to a lens driving mechanism 100, the lens driving mechanism 100 comprising a base 1, a bracket 2, a frame 3, a carrier 4, a reed 5 and a housing 6. The base 1 is used for supporting the frame 3 to move along the radial direction; the frame 3 is used for mounting a carrier 4; the carrier 4 is used for installing the lens and can drive the lens to move along the optical axis direction; the reed 5 is used for driving the carrier 4 to reset; the housing 6 covers the outside of the frame 3 and the carrier 4 and is connected to the base 1 for preventing foreign objects from entering the lens.

Specifically, the base 1 includes a bottom plate 13 and a plurality of stopper posts 14, the bottom plate 13 is rectangular plate-shaped, and four stopper posts 14 extend from the top surface of the bottom plate 13 in a vertical direction parallel to the optical axis direction. The four stopper posts 14 are substantially identical in height and located at four corners of the bottom plate 13 for restricting the range of movement of the frame 3 in the radial direction.

Also provided within the base 13 are built-in wiring, which may be used for electrical connection to an external power source, and a second coil 12. The second coil 12 is electrically connected to the built-in wiring.

The top surface of the bottom plate 13 is also provided with four second rollers 11, and the four second rollers 11 are respectively close to the four limit posts 14 and are positioned at the radial inner sides of the four limit posts 14. The axes of the four second rollers 11 are parallel or overlap, and the axes of the second rollers 11 are perpendicular to the optical axis direction. The bottoms of the four second rollers 11 are positioned in the bottom plate 13, and the tops of the four second rollers protrude out of the top surface of the bottom plate 13 and are used for supporting the bracket 2.

The support 2 is located on top of the four second rollers 11, and the support 2 is movable relative to the base 13 in a direction perpendicular to the axis of the second rollers 11. The four stopper posts 14 prevent the movement of the bracket 2 with respect to the axial direction of the second roller 11, and also restrict the range of movement of the bracket 2 with respect to the bottom plate 13 in the axial direction perpendicular to the second roller 11.

The bottom plate 13 is made of plastic material and is also formed by injection molding. The second roller 11 extends along both ends of the axis to form a connecting rod, and may be connected to the bottom plate 13 by two-shot molding. Specifically, when the bottom plate 13 is processed, a majority of the area of the bottom plate 13 is first injection molded into a semi-finished product by using a first mold, four grooves are formed, the depth of two ends of each groove is slightly higher than the depth of the middle, the two ends are used for placing connecting rods, and the middle is used for preventing the second rolling shaft 11. The four second rolling shafts 11 are respectively arranged in the four grooves, connecting rods of the second rolling shafts 11 are positioned at two ends of the grooves, then the semi-finished product and the four second rolling shafts 11 are arranged in a second die, and injection molding is carried out on two ends of the grooves, so that the connecting rods are rotatably connected with the bottom plate 13.

In another embodiment, the semi-product is provided with four grooves, after the four second rollers 11 are placed in the four grooves, the connecting rods of the four second rollers 11 are located on the top surface of the bottom plate 13, the semi-product and the four second rollers 11 can be placed in a second mold, and then the top surface of the bottom plate 13 and two ends of the four second rollers 11 are injection molded, that is, the second injection molding forms a protruding block protruding from the bottom plate 13, and the protruding block connects the connecting rods of the four second rollers 11 with the rotatable shaft of the bottom plate 13.

In other embodiments, the semi-finished product of the base plate 13 after the first injection molding is provided with four mounting holes, and the thickness direction of the base plate 13 penetrates through the base plate 13. And placing the semi-finished product in a second die, respectively placing four second rolling shafts 11 in four mounting holes, and respectively arranging connecting rods of the four second rolling shafts 11 on the top surface of the bottom plate. The positions of the connecting rods of the four second rollers 11 are subjected to secondary injection molding, and the connecting rods of the four second rollers 11 are connected with the top surface of the bottom plate 13 in a rotatable shaft manner.

It should be appreciated that the second roller 11 may be made of various materials, such as metal, ceramic, soft rubber or plastic. It should be noted that if the four second rollers 11 are made of plastic material, the semi-finished product of the bottom plate 13 and the four second rollers 11 may be directly molded by injection molding.

The bracket 2 is a rectangular frame, four third rollers 21 are arranged at the top of the bracket 2, and the four third rollers 21 are respectively positioned at four corners of the bracket 2. The bottoms of the four third rollers 21 are positioned in the bracket 2, and the tops of the four third rollers protrude out of the top of the bracket 2. Further, the axes of the four third rollers 21 are parallel or overlapping each other and perpendicular to both the axis and the optical axis direction of the second roller 11. Four third rollers 21 are used to support the frame 3 for movement in a direction perpendicular to the axis of the third rollers 21.

The third roller 21 and the bracket 2 may be connected by injection molding of the second roller 11 and the bottom plate 13, that is, by two injection molding. If the third roller 21 is made of plastic, it may be integrally injection-molded with the bracket 2 during the second injection molding process.

The frame 3 is movable relative to the frame 2 in a direction perpendicular to the axis of the third roller 21, and the frame 3 is movable by the frame 2 in a direction perpendicular to the axis of the second roller 11, whereby it is known that the frame 3 is movable relative to the base 13 in two mutually perpendicular radial directions perpendicular to the direction of the optical axis.

The frame 3 is located radially inside the four limiting posts 14 and is spaced from the four limiting posts 14, and the four limiting posts 14 can limit the range of radial movement of the frame 3.

The frame 3 is irregularly ring-shaped and provided with a magnet group comprising a first group of magnets 31 and a plurality of second groups of magnets, the first group of magnets 31 and the plurality of second groups of magnets being connected to several sides of the frame 3, respectively.

The radial inner side of the frame 3 is further provided with two first rollers 32, and the two first rollers 32 extend in the vertical direction perpendicular to the optical axis direction at two adjacent corners of the frame 3, respectively.

The first roller 32 and the frame 3 may be connected by injection molding of the second roller 11 and the bottom plate 13, that is, by two injection molding. If the first roller 32 is made of plastic, it may be integrally injection-molded with the frame 3 during the second injection molding process. The first set of magnets 31 is disposed on one side of the frame 3 and between the two first rollers 32, and the first set of magnets 31 and the second coil 12 cooperate to drive the frame 3 to move along the axis direction perpendicular to the second roller 11 or the third roller 21. The second magnet set is also matched with the second coil 12 to drive the frame 3 to move along the direction perpendicular to the axis of the third roller 21 or the second roller 11, so as to compensate the shake of the lens.

The carrier 4 is mounted in the ring of the frame 3 and provided with a first coil 44, and the first coil 44 and the first magnet set cooperate to drive the carrier 4 to move along the optical axis direction so as to adjust the focal length of the lens.

The carrier 4 comprises an annular frame 41, a conductive member 47 and a circuit board 42, wherein the annular frame 41 is annular, the radially outer side of the annular frame 41 is substantially matched in shape with the radially inner side of the frame 3, and the ring of the carrier 4 is used for mounting a lens. Two guide grooves 46 are provided on the outer side of one side portion of the annular frame 41, the two guide grooves 46 are respectively adjacent to adjacent corners of the annular frame 41 and extend in the vertical direction, and the two guide grooves 46 respectively penetrate the annular frame 41 in the vertical direction and are used for accommodating the two first rollers 32.

The annular frame 41 is irregularly shaped and includes two first sides 401, two second sides 402, and two third sides 403, the two first sides 401 being disposed parallel to and opposite to each other, the two second sides 402 being disposed parallel to and opposite to each other, the two third sides 403 being located between the two second sides 402 and the third sides 403.

The conductive member 47 is disposed inside the annular frame 41 and has a plurality of connection terminals, and the plurality of connection terminals are disposed outside the annular frame 41.

Of the two first sides 401, one first side 401 is disposed opposite to the first magnet group and is provided with a mounting groove 45. Two guide grooves 46 are also provided on the first side 401 at both ends of the mounting groove 45 and spaced apart from the mounting groove 45.

The first coil 44 and the circuit board 42 are respectively located in the mounting groove 45, and the circuit board 42 and the first coil 44 are respectively electrically connected to the conductive member 47. The first coil 44 cooperates with the first set of magnets to drive the carrier 4 to move in the direction of the optical axis. The circuit board 42 is provided with a control chip 43, and the control chip 43 can control the on-off of the current of the first coil 44.

The first coil 44 and the first magnet group are configured to drive the carrier 4 to move in the optical axis direction when they interact. When the carrier 4 moves, the two guide grooves 46 move stably along the optical axis direction along the two first rollers 32. In addition, if the carrier 4 moves obliquely or radially, the first roller 32 is touched, and the first roller 32 can rotate around the axis thereof, so that the first roller can be in rolling contact with the carrier 4, and abrasion of the carrier 4 can be reduced. Since the two guide grooves 46 and the first coil 44 are provided at the first side 401, the driving force generated by the first coil 44 and the first magnet group is mainly concentrated at the first side 401 of the carrier 4, so that the two guide grooves 46 and the two first rollers 32 can be closely fitted to secure the moving direction of the carrier 4.

In order to ensure that the first side 401 is closer to the first set of magnets 31, a magnet sheet or other permanent magnet that attracts the first set of magnets 31 may be provided on the first side 401.

In addition, the top surface and the bottom surface of the annular frame 41 are respectively provided with a silica gel layer, and the silica gel layer is made of silica gel material and has certain elasticity. Since the first coil 44 is provided with the first side 401, the driving force generated by the first coil 44 and the first magnet group is mainly concentrated on the first side 401, the silica gel layer is preferably provided on the top or bottom surfaces of the two first sides 401, and the silica gel layer is preferably sheet-shaped. When the carrier 4 moves along the optical axis direction, if the carrier 4 touches the top or bottom plate 13 of the housing 6, the silica gel layer can prevent noise generated when the carrier 4 touches the housing 6 or the bottom plate 13.

The reed 5 is located on the top surface of the carrier 4 of the frame 3 and is connected with the frame 3 and the carrier 4, and after the carrier 4 moves along the optical axis direction, the reed 5 can drive the carrier 4 to reset. In addition, the reed 5 can be electrically conductive and electrically connected to the conductive member 47 and the built-in wiring within the stopper post 14. After the built-in circuit in the base 1 is electrically connected to an external power source, the conductive member 47 and the first coil 44 can be energized via the reed 5.

According to the utility model, the silica gel layer and the guide groove 46 are arranged on the carrier 4, so that the carrier 4 can be ensured to stably run, noise can be reduced, and the method has a huge market prospect.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims

1. A carrier, the carrier comprising:

and the first coil is connected with the annular frame.

2. The carrier of claim 1, wherein the annular frame comprises two first sides, the two first sides being disposed parallel and opposite;

the guide groove and the first coil are located on the same first side.

3. The carrier of claim 2, wherein a mounting groove is provided radially outward of the first side, the first coil being located within the mounting groove;

4. A carrier according to claim 3, wherein two of the guide grooves are located at both ends of the mounting groove, respectively, and are spaced apart from the mounting groove.

5. The carrier of claim 1, further comprising:

6. A lens driving mechanism, characterized by comprising:

the vector of any one of claims 1-5;

7. The lens driving mechanism according to claim 6, wherein the carrier further comprises a conductive member, at least a portion of the conductive member being embedded within the annular frame and electrically connected to the first coil;

the base includes:

8. The lens driving mechanism according to claim 6, wherein a first roller is further provided on an inner side of the frame, an axis of the first roller is parallel to the optical axis direction, and at least a part of the first roller is located in the guide groove.

9. The lens driving mechanism according to claim 8, wherein the guide groove and the first coil are located on the same side of the annular frame.

10. The lens driving mechanism according to claim 7, wherein a plurality of second rollers are provided on a top surface of the base plate, and axes of the second rollers are perpendicular to the optical axis direction for supporting the movement of the holder;