CN220367463U - Frame, base assembly and lens driving mechanism - Google Patents

Abstract

The utility model discloses a frame, a base assembly and a lens driving mechanism. The magnet group is connected with the annular frame. The elastic colloid covers at least a part of the radial outer side of the annular frame. The lens driving mechanism has simple structure and is easy to process and install. The outside of frame is equipped with elastic colloid, can reduce the wearing and tearing that frame and the inner wall collision of shell caused, can also avoid producing the noise, extension life.

Description

Frame, base assembly and lens driving mechanism

Technical Field

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

The lens driving mechanism in the prior art is used for connecting the frame with the base through a plurality of suspension wires, but the suspension wires are easy to shake and are not stable enough, so that the stable operation of the frame can not be ensured, and the anti-shake function can be influenced. Therefore, development of a more stable lens driving mechanism is required.

Disclosure of Invention

The utility model aims to provide a frame, a base assembly and a lens driving mechanism so as to solve the problems.

To solve the above technical problems, embodiments of the present utility model provide a frame, including:

the annular frame is an annular piece formed by extending around a vertical axis;

the magnet group is connected with the annular frame;

and the elastic colloid covers at least part of the radial outer side of the annular frame.

In one embodiment, the annular frame includes two sides extending in a first direction and two sides extending in a second direction;

the elastic colloid is arranged on the radial outer side of the annular frame along the first direction and/or the second direction;

the first direction, the second direction and the vertical axis are perpendicular to each other.

In one embodiment, the elastic colloid is a silica gel layer pad.

In one embodiment, a groove is arranged on the radial outer side of the annular frame; one part of the elastic colloid is positioned in the groove, and the other part of the elastic colloid protrudes out of the radial outer side of the annular frame.

In one embodiment, the annular frame is provided with a plurality of corners, each corner of the annular frame is provided with an avoidance groove, the extending direction of the avoidance groove is parallel to the vertical axis direction and penetrates through the annular frame, and the avoidance groove is opened towards the radial outer side of the annular frame;

the inner wall of each avoidance groove is respectively provided with the elastic colloid.

The utility model also relates to a base assembly comprising:

the frame as described above may be provided with a plurality of ribs,

the plate body is positioned at the bottom of the frame and is arranged at intervals opposite to the frame;

the movable frame is positioned on the top surface of the plate body and is in rolling connection with the plate body, and the movable frame is arranged to be movable relative to the plate body along a first direction;

the frame is positioned on the top surface of the movable frame and is in rolling connection with the movable frame, and the frame is arranged to be movable along a second direction relative to the movable frame;

the first direction, the second direction and the vertical axis are perpendicular to each other.

In one embodiment, the plate body is provided with a plurality of first rotating shafts, the first rotating shafts are rotatably connected with the plate body, at least one part of the first rotating shafts protrudes out of the top surface of the plate body, and the axes of the first rotating shafts are parallel to the second direction;

the movable frame is positioned on the top surfaces of the first rotating shafts and is in rolling connection with the first rotating shafts;

the top surface of the movable frame is provided with a plurality of second rotating shafts, the second rotating shafts are arranged at intervals, and the axes of the second rotating shafts are parallel to the first direction;

the frame is positioned on the top surfaces of the second rotating shafts and is in rolling connection with the second rotating shafts.

In one embodiment, the annular frame is provided with a plurality of corners, each corner of the annular frame is respectively provided with an avoidance groove, the extending direction of the avoidance groove is parallel to the vertical axis direction and penetrates through the annular frame, and the avoidance groove is opened towards the radial outer side of the annular frame; the elastic colloid is arranged on the inner wall of the avoidance groove;

the movable frame is provided with a plurality of limiting grooves which are respectively aligned with the avoidance grooves along the vertical direction;

the top surface of the plate body is provided with a plurality of limiting pieces extending along the vertical direction, and a part of the limiting pieces are respectively positioned in the limiting grooves and the avoiding grooves; the limiting pieces are in abutting arrangement with the inner walls of the limiting grooves along the first direction, and the limiting pieces are arranged at intervals along the inner walls of the limiting grooves along the second direction;

the limiting pieces and the avoidance grooves are arranged at intervals along the first direction and the second direction.

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

the base assembly is characterized in that a first coil is arranged in the plate body, and the magnet group is matched with the first coil to drive the frame to move along the first direction or the second direction;

the carrier is positioned in the frame and is provided with a second coil, and the second coil and the magnet group are matched to drive the carrier to move along the vertical direction;

the elastic piece is connected with the carrier and the frame and is used for driving the carrier to reset;

and the shell covers the outer parts of the frame and the carrier and is connected with the plate body.

In one embodiment, the carrier is provided with a guide groove extending in a vertical direction;

the lens driving mechanism further comprises a third rotating shaft, the third rotating shaft is connected with the inner side of the annular frame, the axis of the third rotating shaft is parallel to the vertical axis, and at least one part of the third rotating shaft is located in the guide groove.

The lens driving mechanism has simple structure and is easy to process and install. The outside of frame is equipped with elastic colloid, can reduce the wearing and tearing that frame and the inner wall collision of shell caused, can also avoid producing the noise, extension life.

Drawings

Fig. 1 and 2 are exploded views of a lens driving mechanism according to an embodiment of the present utility model.

Fig. 3 is an exploded view of the base in the embodiment of fig. 1 and 2.

Fig. 4 is a perspective view of the movable frame in the embodiment shown in fig. 3.

Fig. 5 is a perspective view of the frame and carrier of the embodiment of fig. 1.

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

Fig. 7 is a perspective view of the frame in the embodiment shown in fig. 1.

Fig. 8 is a perspective view of the carrier, second coil, built-in metal sheet, circuit board and control chip of the embodiment shown in fig. 1.

Reference numerals: 100. a lens driving mechanism; 1. a base; 11. a plate body; 111. a first mounting groove; 112. a first rotating shaft; 113. a first coil; 114. a built-in circuit; 12. a movable frame; 121. a first rolling groove; 122. a second mounting groove; 123. a second rotating shaft; 124. a limit groove; 125. an extension; 13. a limiting piece; 2. a frame; 21. a second rolling groove; 22. a magnet group; 221. a magnet array; 222. an axial magnet; 223. a radial magnet; 224. a magnet bar; 225. a magnet groove; 23. a third rotating shaft; 24. an annular frame; 25. a cover plate; 26. a third mounting groove; 27. an avoidance groove; 3. a carrier; 31. a second coil; 32. a metal sheet is arranged in the steel plate; 33. a circuit board; 34. a control chip; 35. a guide groove; 4. an elastic member; 5. a housing; 6. an elastic colloid; x, a first direction; y, second direction; z, vertical direction.

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 and a chassis 1 thereof, as shown in fig. 1 and 2, the lens driving mechanism 100 includes a chassis 1, a frame 2, a carrier 3, an elastic member 4, and a housing 5. Wherein the base 1 is used for supporting the frame 2 for movement, and the frame 2 is used for preventing lens shake and limiting the movement of the carrier 3. The carrier 3 is used for installing the lens and driving the lens to move along the optical axis direction so as to adjust the focal length of the lens. The elastic member 4 is used for driving the carrier 3 to reset. The housing 5 covers the outside of the frame 2 and the carrier 3 and is connected with the plate 11 in the base 1, and the housing 5 is used for protecting the outside foreign matters from interfering into the inside.

Specifically, as shown in fig. 1 and 3, the base 1 includes a plate body 11 and a movable frame 12 rollably connected to the plate body 11. The plate 11 is rectangular and includes two sides extending in a first direction X and two sides extending in a second direction Y, and the plane of the plate 11 is perpendicular to a vertical direction Z, that is, the optical axis direction, that is, the first direction X, the second direction Y, and the optical axis direction are perpendicular to each other. It should be understood that in other embodiments, the plate 11 may have other shapes and the specific shape of the plate 11 is not limited.

The top surface of the plate 11 is provided with four first rotating shafts 112, the four first rotating shafts 112 are respectively located at four corners of the plate 11, and the axes of the first rotating shafts 112 are parallel to the second direction Y. Four first shafts 112 are used to support the movable frame 12 for rolling in the first direction X. It should be understood that the number of the first rotating shafts 112 may be three, five, six or more, as long as the plurality of first rotating shafts 112 are spaced apart and can support the movable frame 12 to roll along the second direction Y. The first rotation shaft 112 may be disposed at a position near four sides of the plate 11. The present utility model is not limited to the number and specific location of the first shafts 112.

Further, in the embodiment shown in fig. 3, the four corners of the plate body 11 are respectively provided with the first mounting grooves 111, and the four first mounting grooves 111 extend in the second direction Y, respectively. The four first rotating shafts 112 are respectively located in the four second mounting grooves 122 and are respectively rotatably connected with the inner walls of the four first mounting grooves 111. The bottoms of the four first rotating shafts 112 are positioned in the four first mounting grooves 111, and the tops of the four first rotating shafts extend beyond the top surface of the plate body 11 and abut against the bottom of the movable frame 12, so that the movable frame 12 can be conveniently supported to roll. The size of the entire lens driving mechanism 100 can be reduced by reasonably controlling the depth of the first shaft 112 sunk into the first mounting groove 111 and minimizing the gap between the first shaft 112 and the movable frame 12.

The bottom plate 11 is made of plastic material and is formed by injection molding. The first shafts 112 extend along both ends of the axis to be connected to the base plate 11 by two-shot molding. Specifically, when the base plate 11 is processed, a majority of the area of the base plate 11 is first injection molded into a semi-finished product by using a first mold, four first mounting grooves 111 are formed, the depth of both ends of the four first mounting grooves 111 is slightly higher than the depth of the middle, both ends are used for placing connecting rods, and the middle is used for preventing the first rotating shaft 112. The four first rotating shafts 112 are respectively arranged in the four first mounting grooves 111, connecting rods of the first rotating shafts 112 are positioned at two ends of the first mounting grooves 111, then the semi-finished product and the four first rotating shafts 112 are arranged in a second die, and injection molding is carried out on two ends of the first mounting grooves 111, so that the connecting rods are rotatably connected with the bottom plate 11.

In another embodiment, the semi-finished product is provided with four first mounting grooves 111, after the four first rotating shafts 112 are placed in the four first mounting grooves 111, the connecting rods of the four first rotating shafts 112 are located on the top surface of the bottom plate 11, the semi-finished product and the four first rotating shafts 112 can be placed in a second mold, and then injection molding is performed on the top surface of the bottom plate 11 and two ends of the four first rotating shafts 112, namely, the second injection molding forms a protruding block protruding out of the bottom plate 11, and the protruding block connects the connecting rods of the four first rotating shafts 112 with the rotatable shaft of the bottom plate 11.

In other embodiments, the semi-finished product of the base plate 11 after the first injection molding is provided with four mounting holes, and the thickness direction of the base plate 11 penetrates through the base plate 11. The semi-finished product is placed in the second die, the four first rotating shafts 112 are respectively placed in the four mounting holes, and the connecting rods of the four first rotating shafts 112 are respectively arranged on the top surface of the bottom plate. The positions of the connecting rods of the four first rotating shafts 112 are subjected to secondary injection molding, and the connecting rods of the four first rotating shafts 112 are rotatably connected with the top surface of the bottom plate 11.

It should be appreciated that the first shaft 112 may be made of various materials, such as metal, ceramic, soft plastic, or plastic. It should be noted that if the four first shafts 112 are made of plastic, the semi-finished product of the base plate 11 and the four first shafts 112 may be directly molded by injection molding during the second molding.

The first rotation shaft 112 may directly abut against the bottom surface of the movable frame 12 and support the movable frame 12 for movement in the first direction X. As shown in the drawing, the movable frame 12 is rectangular and annular, and the four corners of the bottom surface are respectively provided with one first rolling groove 121, and the four first rolling grooves 121 are formed by recessing the bottom surface of the movable frame 12 and extend along the first direction X for accommodating the tops of the four first rotating shafts 112, that is, the top surfaces of the four first rotating shafts 112 abut against the inner walls of the four first rolling grooves 121 of the movable frame 12. The first rolling groove 121 extends in the first direction X by a distance sufficient for the movement stroke of the movable frame 12.

The four corners of the plate body 11 are also respectively provided with a limiting piece 13, the four limiting pieces 13 extend from the top surface of the plate body 11 to the top and beyond the top of the movable frame 12, and the four limiting pieces 13 and the four first rotating shafts 112 are arranged at intervals without influencing each other. In the embodiment shown in fig. 1, the movable frame 12 is in a rectangular frame structure, four corners of the movable frame 12 are also provided with limiting grooves 124, the four limiting grooves 124 are respectively formed by recessing the four corners of the movable frame 12 towards the inside, and the four limiting grooves 124 respectively accommodate the four limiting pieces 13 for limiting the movement range of the movable frame 12 along the first direction X and preventing the movable frame 12 from being separated from the plate 11.

Specifically, a portion of the four limiting members 13 are disposed in the four limiting grooves 124, and the four limiting members 13 and the four limiting grooves 124 are disposed at intervals along the side wall of the first direction X, so as to allow the movable frame 12 to move a certain distance in the first direction X. The four limiting members 13 are in contact with the inner walls of the four limiting grooves 124 along the second direction Y, so as to prevent the movable frame 12 from extending along the second direction.

Alternatively, in other embodiments, four limiting members 13 may be disposed on the inner sides of the four corners of the movable frame 12, and may cooperate with the inner side walls of the movable frame 12 to limit the movement of the movable frame 12, and the specific positions of the limiting members 13 are set according to the shape of the movable frame 12.

Generally, in order to limit the movement range of the movable frame 12 along the first direction X, at least two limiting members 13 are required, and the two limiting members 13 may be disposed at two sides of the movable frame 12 along the first direction X at intervals, so as to limit the movement range of the movable frame 12 along the first direction X respectively.

In order to prevent the movement of the movable frame 12 in the second direction Y, at least two stoppers 13 are also required, which stoppers 13 may be provided at both sides of the movable frame 12 in the second direction Y for preventing the movement of the movable frame 12 in the second direction Y.

The board 11 is further provided with a built-in circuit 114, and the built-in circuit 114 extends to the top surface of part or all of the limiting members 13 for electrically connecting with the elastic member 4.

The four corners of the movable frame 12 are provided with extending portions 125 extending toward the inside, as shown in fig. 4, the four extending portions 125 are located inside the four corners of the movable frame 12, the top surfaces of the four extending portions 125 are respectively provided with second mounting grooves 122, and each second mounting groove 122 extends along the first direction X and is provided with a second rotating shaft 123.

The axis direction of the second rotating shaft 123 is parallel to the first direction X and rotatably connected to the inner wall of the second mounting groove 122, the bottom of the second rotating shaft 123 is located in the second mounting groove 122, and the top protrudes from the top surface of the extension portion 125 and the movable frame 12, so as to be used for supporting the frame 2. The number of the second rotating shafts 123 may be three, five, six, or the like, and the number or position of the second rotating shafts 123 may be set according to the shape of the movable frame 12.

The second shaft 123 and the movable frame 12 may be connected by injection molding, i.e., two-shot injection molding, of the first shaft 112 and the bottom plate 11. If the four second rotating shafts 123 are made of plastic, they may be integrally injection molded with the movable frame 12 during the second injection molding process.

The frame 2 includes an annular frame 24, a magnet group 22, a third rotation shaft 23, and a cover plate 25. The annular frame 24 is an annular member formed by extending around a first vertical axis and is located at the top of the movable frame 12, and the first vertical axis direction is parallel to the optical axis direction or the vertical direction Z, that is, the first vertical axis direction, the first direction and the second direction are perpendicular to each other.

As shown in fig. 5 and 6, the ring frame 24 is rollably connected to the movable frame 12 through four second rotation shafts 123. Specifically, the annular frame 24 may move along the second direction Y through the four second rotating shafts 123, and the four limiting members 13 may limit the range of movement of the annular frame 24 along the second direction Y.

The bottom surface of the annular frame 24 may directly abut against the top of the four second rotating shafts 123, and move by rolling of the second rotating shafts 123. As shown in fig. 5, the bottom surface of the annular frame 24 is provided with four second rolling grooves 21, the four second rolling grooves 21 extend along the second direction Y and are aligned with the four second mounting grooves 122 along the vertical direction Z, and the top surfaces of the four second rotating shafts 123 are respectively located in the four second rolling grooves 21. The clearance between the movable frame 12 and the frame 2 can also be reduced by adjusting the depths of the second mounting groove 122 and the second rolling groove 21 as long as the ring-shaped frame 24 can move with respect to the movable frame 12.

The base 1 of the utility model has simple structure, the movable frame 12 and the plate body 11 can be connected in a rolling way, the frame 2 and the movable frame 12 can be connected in a rolling way, the frame 2 can stably move along the first direction X and the second direction Y relative to the plate body 11, the structure is simple, and the stable operation of the frame 2 can be ensured.

The annular frame 24 is further provided with elastic colloid 6 along two radial outer sides of the first direction X and the second direction Y, and the elastic colloid 6 is preferably a silica gel layer pad, which is equivalent to a soft cushion and has a certain elasticity, and other elastic pads with elasticity can be selected. When the annular frame 24 moves along the first direction X or the second direction Y, the elastic colloid 6 can buffer the impact force of the annular frame 24 and avoid noise.

Of course, if one radial outer side or two radial side portions of the annular frame 24 are liable to collide with the inner wall of the housing 5, the elastic colloid 6 may be disposed on one or two radial outer sides of the annular frame 24, that is, the elastic colloid 6 may be disposed according to actual requirements. The annular frame 24 is provided so as to be movable in the first direction X or the second direction Y, and therefore the elastic colloid 6 needs to be provided radially outside the annular frame 24 in the first direction and the second direction.

The elastic gel 6 may be attached to the radially outer side of the annular frame 24 by means of adhesive, although other means are possible. For example, a groove may be provided on the radially outer side of the annular frame 24, and the extending direction of the groove may be aligned with the longitudinal direction of the side portion of the annular frame 24 where the elastic body 6 is located, that is, may extend in the first direction or the second direction. One part of the elastic colloid 6 is laid into the groove, and the other part slightly protrudes outside the annular frame 24.

The four corners of the annular frame 24 are further provided with escape grooves 27, respectively, the four escape grooves 27 extend in the vertical direction and penetrate the annular frame 24, that is, the escape grooves 27 are open toward the outside of the annular frame 24, and the four escape grooves 27 accommodate the four stoppers 13, respectively. The four stoppers 13 can also restrict the range of movement of the frame 2 in the first direction X and the second direction Y when the frame 2 moves in the second direction Y relative to the movable frame 12.

Specifically, the four limiting members 13 are located in the four avoidance grooves 27 respectively, and the four limiting members 13 and the inner walls of the four avoidance grooves 27 along the first direction X and the second direction Y are all spaced by a preset distance. When the annular frame 24 moves along the first direction X or the second direction Y, the inner walls of two avoidance grooves 27 of the four avoidance grooves 27 along the first direction X or the second direction Y touch the limiting member 13, and further movement is limited.

In order to reduce the noise generated by the impact between the limiting piece 13 and the inner wall of the avoidance groove 27, the elastic colloid 6 can be arranged on the inner wall of the avoidance groove 27, so that the movement of the frame 2 can be buffered, the abrasion of the frame 2 and the limiting piece 13 caused by the impact can be reduced, and the noise can be reduced.

The ring frame 24 is irregularly shaped, and the magnet group 22 is attached to a plurality of sides of the ring frame 24. The plate 11 is provided with a first coil 113, the first coil 113 is electrically connected with a built-in circuit 114 of the plate 11, and the first coil 113 and the magnet group 22 can move along the first direction X or the second direction Y in cooperation with the driving frame 2. The carrier 3 is located in the ring of the frame 2 and a second coil 31 is arranged on the outer side of the ring, and the second coil 31 and the magnet group 22 are matched to drive the carrier 3 to move along the vertical direction Z, namely along the optical axis direction, so that the focal length of the lens is adjusted.

Preferably, as shown in fig. 7, the magnet group 22 includes at least one magnet array 221 and one magnet strip 224, and the magnet array 221 includes at least three magnets, two of which are axial magnets 222 and one of which is a radial magnet 223.

Specifically, the magnet array 221 extends entirely along the second direction Y and is connected to one side portion of the annular frame 24 along the first direction X, the side portion being disposed opposite to the second coil 31 of the carrier 3 along the first direction X, and the bottom ends of the two axial magnets 222 and the radial magnets 223 of the magnet array 221 are substantially flush, and are close to the plate body 11 and aligned with the first coil 113 of the plate body 11 along the optical axis direction. The two axial magnets 222 of the magnet array 221 are arranged at intervals along the first direction X, and the magnetic poles of the two axial magnets 222 are reversely arranged along the vertical direction Z, that is, the N pole of one axial magnet 222 is located at the top end, the S pole is located at the bottom end, the N pole of the other axial magnet 222 is located at the bottom end, and the S pole is located at the top end.

The poles of the radial magnet 223 are arranged in a first direction X, i.e. the N-pole of the radial magnet 223 is located at the inner end in the first direction X and the S-pole is located at the outer end in the first direction X, or vice versa.

In the magnet array 221, magnetic field lines of an axial magnet 222 close to the second coil 31 pass through the second coil 31, and the axial magnet 222 cooperates with the second coil 31 to drive the carrier 3 to move along the vertical direction Z.

The two axial magnets 222 and the radial magnets 223 are matched with the first coil 113 in the plate 11 to drive the annular frame 24 to move along the first direction X or the second direction Y. Specifically, since the poles of the two axial magnets 222 are disposed in opposite directions and are arranged in the vertical direction Z, the N pole of one axial magnet 222 is positioned at the bottom end, the S pole of the other axial magnet 222 is positioned at the bottom end, the N pole and S pole of the two axial magnets 222 may form magnetic field lines, which may vertically pass through the first coil 113 in a large amount, between the axial magnets 222 on both sides of the first coil 113 in the first direction X. In addition, the N pole and the S pole at the bottom ends of the two axial magnets 222 form magnetic field lines with the radial magnets 223, respectively, and the magnetic field lines may also pass through the first coil 113, so that the magnetic flux of the magnet array 221 passing through the first coil 113 may be increased, thereby improving the driving force to the annular frame 24.

In other embodiments, in order to increase the driving force to the annular frame 24, a plurality of axial magnets 222 and a plurality of radial magnets 223 extending in the second direction Y may be provided, and one radial magnet 223 is provided between two adjacent axial magnets 222, that is, the plurality of axial magnets 222 and the plurality of radial magnets 223 are alternately arranged along the first direction X. The magnetic poles of two adjacent axial magnets 222 are arranged in opposite directions, that is, the N pole of one axial magnet 222 is positioned at the top end, the S pole is positioned at the bottom end, the N pole of the other axial magnet 222 is positioned at the bottom end, and the S pole is positioned at the top end. The magnetic poles of the radial magnet 223 may be arranged along the first direction X.

More preferably, the dimension of the axial magnet 222 located on the inner side in the vertical direction Z is larger than the dimension of the axial magnet 222 located on the outer side. That is, the height of the axial dimension of the second coil 31 near the carrier 3 is larger than the height of the external axial magnet 222. Since the inner axial magnet 222 is also required to drive the carrier 3 to move in cooperation with the second coil 31 of the carrier 3, the size of the axial magnet 222 needs to be increased to increase the magnetic flux passing through the second coil 31. The outer axial magnet 222 needs to be matched with the inner axial magnet 222 to form magnetic field lines, so that the height dimension can be reduced to reduce the weight of the whole lens driving mechanism 100.

The axial magnet 222 located inside is also provided with a magnet groove 225, the magnet groove 225 is formed by recessing a side surface of the axial magnet 222 facing the second coil 31 and extending in the second direction Y, and the magnet groove 225 is located at a middle position of the axial magnet 222 in the optical axis direction.

Before the magnet groove 225 is provided, the polarized region of the N pole and the polarized region of the S pole of the axial magnet 222 are located at the top end and the bottom end, respectively, and the magnetic field lines extend from the top end to the bottom end of the axial magnet 222 and penetrate the second coil 31.

After the magnet slot 225 is arranged, a part of the polarized region of the N pole and the polarized region of the S pole are also formed near the magnet slot 225, and the N pole and the S pole at the top end and the bottom end of the axial magnet 222 also form new magnetic field lines with the S pole and the N pole near the magnet slot 225, wherein the new magnetic field lines are closer to the second coil 31, and the new magnetic field lines are easier to vertically pass through the second coil 31, so that the magnetic flux passing through the second coil 31 can be greatly increased, and the driving force on the carrier 3 is increased.

In addition, the magnet set 22 further includes two magnet bars 224, where the two magnet bars 224 are connected to two side portions of the annular frame 24 along the second direction Y, and are used to cooperate with the second coil 31 in the base to drive the annular frame 24 to move along the first or second direction Y. In other embodiments, two sets of magnet arrays 221 and two magnet strips 224 may be alternately arranged, where the two magnet arrays 221 are arranged on two opposite sides of the annular frame 24 along the first direction X, and the two magnet strips 224 are arranged on two opposite sides of the annular frame 24 along the second direction Y. The carrier 3 is provided with two groups of second coils 31, and the two second coils 31 are respectively matched with two axial magnets 222 close to the inner side in the two groups of magnet arrays 221 to drive the carrier 3 to move. The two magnet bars 224 and the two magnet arrays 221 are respectively matched with the four first coils 113 in the base to drive the annular frame 24 to move along the first direction X or the second direction Y, so as to prevent lens shake.

The top of the four limiting members 13 is substantially flush with the top of the annular frame 24, and the built-in circuit 114 may extend from the board 11 to the top of the limiting members 13 and form a connection terminal for electrically connecting with the elastic member 4.

The elastic member 4 is formed of four electrically conductive wires, which are connected to the top of the annular frame 24 and the top of the carrier 3, respectively, and are also electrically connected to the connection end of the stopper 13 and the built-in metal piece 32 in the carrier 3, and the current of the built-in wire 114 can flow from the wires into the built-in metal piece 32 of the carrier 3 and then from the built-in metal piece 32 into the second coil 31.

Specifically, as shown in fig. 8, the built-in metal sheet 32 is substantially annular and is embedded in the carrier 3, and the built-in metal sheet 32 can be electrically connected to the connection end of the top end of the stopper 13 through a plurality of wires, respectively, to form a loop.

The carrier 3 is also provided with a circuit board 33 and a control chip 34, the circuit board 33 is electrically connected with the built-in metal sheet 32, and the control chip 34 is arranged on the circuit board 33 and used for controlling the switch of the second coil 31.

In the embodiment shown in fig. 1, the carrier 3 is irregularly annular, it being understood that the utility model is not limited to the particular shape of the carrier 3.

The carrier 3 is moved in the vertical direction Z by means of a third rotation shaft 23. Specifically, as shown in fig. 5 to 7, the inner wall of the annular frame 24 is provided with a mounting groove for mounting the third rotating shaft 23, which is defined as a third mounting groove 26. The third mounting groove 26 is formed by recessing the radially inner side of the annular frame 24 and is located at a corner of the annular frame, and furthermore, the third mounting groove 26 is open toward the top, and the third mounting groove 26 can be regarded as being formed by recessing the top surface of the annular frame 24 downward in the vertical direction Z. The bottom end of the third rotating shaft 23 is rotatably connected with the bottom wall of the third mounting groove 26, and the top end extends to the top opening of the third mounting groove 26, that is, the top end of the third rotating shaft 23 is flush with the top surface of the annular frame 24. The cover plate 25 covers the top surface of the annular frame 24 and is connected to the annular frame 24, and a portion of the cover plate 25 covers the third rotating shaft 23 for restricting the third rotating shaft 23 from being separated from the annular frame 24.

In the embodiment shown in fig. 7, the annular frame 24 is irregularly annular, the above-mentioned third mounting grooves 26 are respectively provided at two adjacent corners, the two third mounting grooves 26 are identical in shape and extend in the optical axis direction, and the two third mounting grooves 26 are respectively located at both ends of the magnet array 221. The cover plate 25 extends along the second direction and covers the top surfaces of the two third rotating shafts 23, so that the two third rotating shafts 23 can be simultaneously limited to be separated from the annular frame 24.

The two third rotating shafts 23 are respectively located in the two third mounting grooves 26 and are respectively connected with the bottom wall rotatable shafts of the two third mounting grooves 26, and a part of the third rotating shafts 23 along the radial direction protrudes out of the inner side of the annular frame 24. And the outer side of the carrier 3 is provided with two guide grooves 35, the two guide grooves 35 extend in the vertical direction and are aligned with the two third rotating shafts 23, and the two guide grooves 35 can accommodate part of the third rotating shafts 23.

The third rotary shaft 23 extends along a second vertical axis that is disposed in parallel with the first vertical axis, that is, the third rotary shaft 23 extends in the vertical direction and is rotatable about the second vertical axis. When the carrier 3 moves in the optical axis direction, the two third rotating shafts 23 can play a guiding role for the carrier 3. Moreover, the two third rotating shafts 23 can rotate, and when the carrier 3 moves along the optical axis direction, the two third rotating shafts 23 can touch the third rotating shafts 23 when slightly rotating around the vertical direction Z, namely, the carrier 3 is in rotating contact with the third rotating shafts 23, namely, the carrier 3 can be limited to rotate along the radial direction, and the abrasion to the carrier 3 can be reduced.

It should be understood that two third rotating shafts 23 may be disposed at two opposite corners of the annular frame 24, and of course, if there is enough space in the annular frame 24, one third rotating shaft 23 may be disposed at each of the corners of the annular frame 24, and the positions of the third rotating shafts 23 may be set according to the requirement.

The third shaft 23 may be replaced by other rolling members, such as balls, and the inner wall of the third mounting groove 26 may be configured as an arc or a hemisphere, and the balls are mounted in the hemispherical or arc-shaped third mounting groove 26 and a part of the balls protrudes out of the third mounting groove 26 and is located in the guide groove 35 of the carrier 3. The carrier 3 can move along the vertical direction Z relative to the balls, and after the balls are touched during the movement of the carrier 3, the carrier 3 can roll very slightly relative to the balls, and the rolling friction is used for replacing the sliding friction, so that the abrasion of the carrier 3 and the annular frame 24 can be greatly reduced. In addition, since a part of the balls is also located in the guide groove 25 of the carrier 2, the amplitude of the rotation of the carrier 2 can be limited, that is, the carrier 2 does not generate a large amplitude rotation with respect to the annular frame 24.

The third shaft 23 and the annular frame 24 may be connected by injection molding, that is, by two-shot injection molding, of the first shaft 112 and the bottom plate 11. If the third shaft 23 is made of plastic, it may be integrally injection-molded with the annular frame 2 during the second injection molding process.

The top surface and the bottom of carrier 3 along the optical axis direction are also equipped with elastic colloid 6 respectively, also can prevent carrier 3 to strike shell 5 and plate body 11 when moving along the optical axis direction, also can avoid carrier 3 to strike shell 5 and plate body 11 in-process production noise.

The lens driving mechanism 100 of the utility model has simple structure, easy processing and installation, reduced cost, and ensured light weight design of the lens driving structure, and can also ensure stable and rapid operation of the carrier 3 and the frame 2, thereby having great market prospect. The frame 2 is provided with the elastic colloid 6, so that abrasion caused by collision between the frame 2 and the inner wall of the shell 5 can be reduced, noise can be avoided, and the service life is prolonged.

While the preferred embodiments of the present utility model have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

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 (10)

1. A frame, comprising:

the annular frame is an annular piece formed by extending around a vertical axis;

the magnet group is connected with the annular frame;

and the elastic colloid covers at least part of the radial outer side of the annular frame.

2. The frame of claim 1, wherein the annular frame comprises two sides extending in a first direction and two sides extending in a second direction;

the elastic colloid is arranged on the radial outer side of the annular frame along the first direction and/or the second direction;

the first direction, the second direction and the vertical axis are perpendicular to each other.

3. The frame of claim 1, wherein the elastic gel is a silicone pad.

4. The frame of claim 1, wherein a groove is provided radially outward of the annular frame; one part of the elastic colloid is positioned in the groove, and the other part of the elastic colloid protrudes out of the radial outer side of the annular frame.

5. The frame according to claim 1, wherein the annular frame has a plurality of corners, each corner of the annular frame is provided with a relief groove, an extending direction of the relief groove is parallel to the vertical axis direction and penetrates the annular frame, and the relief groove is opened toward a radial outside of the annular frame;

the inner wall of each avoidance groove is respectively provided with the elastic colloid.

6. A base assembly, comprising:

the frame of any one of claim 1 to 5,

the plate body is positioned at the bottom of the frame and is arranged at intervals opposite to the frame;

the movable frame is positioned on the top surface of the plate body and is in rolling connection with the plate body, and the movable frame is arranged to be movable relative to the plate body along a first direction;

the frame is positioned on the top surface of the movable frame and is in rolling connection with the movable frame, and the frame is arranged to be movable along a second direction relative to the movable frame;

the first direction, the second direction and the vertical axis are perpendicular to each other.

7. The base assembly of claim 6, wherein the plate body is provided with a plurality of first rotating shafts, the first rotating shafts are rotatably connected with the plate body, at least one part of the plurality of first rotating shafts protrudes out of the top surface of the plate body, and the axis of the first rotating shafts is parallel to the second direction;

the movable frame is positioned on the top surfaces of the first rotating shafts and is in rolling connection with the first rotating shafts;

the top surface of the movable frame is provided with a plurality of second rotating shafts, the second rotating shafts are arranged at intervals, and the axes of the second rotating shafts are parallel to the first direction;

the frame is positioned on the top surfaces of the second rotating shafts and is in rolling connection with the second rotating shafts.

8. The base assembly according to claim 7, wherein the annular frame has a plurality of corners, each corner of the annular frame is provided with a relief groove, an extending direction of the relief groove is parallel to the vertical axis direction and penetrates the annular frame, and the relief groove is opened toward a radial outer side of the annular frame; the elastic colloid is arranged on the inner wall of the avoidance groove;

the movable frame is provided with a plurality of limiting grooves which are respectively aligned with the avoidance grooves along the vertical direction;

the top surface of the plate body is provided with a plurality of limiting pieces extending along the vertical direction, and a part of the limiting pieces are respectively positioned in the limiting grooves and the avoiding grooves; the limiting pieces are in abutting arrangement with the inner walls of the limiting grooves along the first direction, and the limiting pieces are arranged at intervals along the inner walls of the limiting grooves along the second direction;

the limiting pieces and the avoidance grooves are arranged at intervals along the first direction and the second direction.

9. A lens driving mechanism, characterized in that the lens driving mechanism comprises:

the base assembly of claim 6, wherein a first coil is arranged in the plate body, and the magnet group is matched with the first coil to drive the frame to move along the first direction or the second direction;

the carrier is positioned in the frame and is provided with a second coil, and the second coil and the magnet group are matched to drive the carrier to move along the vertical direction;

the elastic piece is connected with the carrier and the frame and is used for driving the carrier to reset;

and the shell covers the outer parts of the frame and the carrier and is connected with the plate body.

10. The lens driving mechanism according to claim 9, wherein the carrier is provided with a guide groove extending in a vertical direction;

the lens driving mechanism further comprises a third rotating shaft, the third rotating shaft is connected with the inner side of the annular frame, the axis of the third rotating shaft is parallel to the vertical axis, and at least one part of the third rotating shaft is located in the guide groove.