CN218974662U - Lens driving device and base thereof - Google Patents

Abstract

The utility model discloses a lens driving device and a base thereof, wherein the base is applied to the lens driving device and comprises a bottom plate, two side plates, a metal sheet and two side circuit boards, and the bottom plate is plate-shaped; the two side plates are arranged in parallel at intervals and connected with the top surface of the bottom plate; the metal sheets comprise a bottom metal sheet and two groups of side metal sheets, and the bottom metal sheet is embedded in the bottom plate and is used for being electrically connected with an external power supply; the two groups of side metal sheets are respectively embedded in the two side plates and are electrically connected with the bottom metal sheets; the two side circuit boards are respectively attached to the two side plates and are respectively electrically connected with the two side metal sheets, and a first group of coils are respectively arranged on the two side circuit boards.

Description

Lens driving device and base thereof

Technical Field

The present utility model relates to the field of optical imaging devices, and in particular, to a lens driving device and a base thereof.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) 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.

Some electronic devices with photographing or video recording function are provided with a lens driving device to drive the optical components of the lens to move, so as to achieve the functions of automatic focusing and optical hand shake prevention.

In the prior art, a built-in circuit and a coil are arranged inside a base of the lens driving device, the coil needs to be close to a magnet of a carrier, and stable electric connection relation is also needed to be formed between the coil and the built-in circuit, so that a base structure is needed to be designed, and the requirements are met.

Disclosure of Invention

The present utility model is directed to a lens driving device and a base thereof, so as to solve the above-mentioned problems.

In order to solve the above technical problems, the present utility model provides a base, which is applied to a lens driving device, and includes:

the bottom plate is plate-shaped;

the two side plates are arranged in parallel at intervals and are connected with the top surface of the bottom plate;

a metal sheet, the metal sheet comprising:

the bottom metal sheet is embedded in the bottom plate and is used for being electrically connected with an external power supply; and

the two groups of side metal sheets are respectively embedded in the two side plates and are electrically connected with the bottom metal sheets;

the two side circuit boards are respectively attached to the two side plates and are respectively electrically connected with the two side metal sheets, and a first group of coils are respectively arranged on the two side circuit boards.

In one embodiment, each set of the side metal sheets includes two metal strips, the two metal strips are disposed at intervals and the bottom ends of the two metal strips are respectively electrically connected with the bottom metal sheets, and the two metal strips are respectively electrically connected with two ends of the first set of coils.

In one embodiment, the top ends of the two metal strips extend away from the bottom plate beyond the top ends of the side plates, and the side circuit board is provided with two connection points, and the two connection points are respectively electrically connected with the top ends of the two metal strips.

In one embodiment, the side circuit board is attached to the inner surface of the side plate, two connection points are located on the outer surface of the side circuit board and correspond to the top ends of the two metal strips respectively, and the two connection points are electrically connected with the top ends of the two metal strips of each group of the side metal sheets respectively in a welding mode.

In one embodiment, the lens driving device further comprises a flexible circuit board, wherein the flexible circuit board is stacked on the top surface of the bottom plate and is electrically connected with the bottom metal sheet, and the flexible circuit board is provided with a plurality of sensors used for sensing the positions of the carriers of the lens driving device.

In one embodiment, the device further comprises a bottom circuit board, wherein the bottom circuit board is stacked on the top surface of the flexible circuit board and is electrically connected with the flexible circuit board, and a second group of coils are arranged in the flexible circuit board.

In one embodiment, the top surface of the bottom plate is further provided with a plurality of positioning posts, and the flexible circuit board and the bottom circuit board are respectively provided with positioning holes for accommodating the positioning posts.

In one embodiment, the bottom plate is a rectangular plate, the four corners are respectively provided with a convex shoulder, the shoulders are positioned on the top surface of the bottom plate, the top surface is provided with a groove, and damping colloid is accommodated in the groove.

In one embodiment, a clamping block is further arranged on the outer side of the side plate and is used for being clamped with a shell of the lens driving device.

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

the base;

the shell covers the outer parts of the two side plates and is connected to the top surface of the bottom plate;

the carrier can be movably connected to the top surface of the bottom plate and is positioned between the two side plates, the carrier is provided with a side magnet and a bottom magnet, the side magnet is matched with the first group of coils to drive the carrier to move along the direction perpendicular to the optical axis, and the bottom magnet is matched with the second group of coils to drive the carrier to move along the direction of the optical axis;

a plurality of reeds connected to the top of the carrier; and

the bottom ends of the suspension wires are respectively connected with the bottom plate, and the top ends of the suspension wires are respectively connected with the reeds.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

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

Fig. 2 is an assembly view of the carrier, base, bottom circuit board, side circuit boards, spring wires and four suspension wires of the embodiment of fig. 1.

Fig. 3 and 4 are perspective views of the base in the embodiment of fig. 1.

Fig. 5 is a perspective view of the metal sheet in the embodiment shown in fig. 3.

Figure 6 is a perspective view of the carrier, suspension, and reed of the embodiment of figure 1.

Reference numerals: 100. a lens driving device; 1. a base; 11. a bottom plate; 111. a shoulder; 112. a groove; 113. positioning columns; 114. damping colloid; 12. a side plate; 13. a metal sheet; 131. a bottom metal sheet; 132. a side metal sheet; 14. a side circuit board; 141. a connection point; 15. a flexible circuit board; 151. a sensor; 16. a bottom circuit board; 2. a carrier; 21. a side magnet; 22. a bottom magnet; 3. a housing; 4. a reed; 5. and (5) suspending wires.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the utility model, numerous specific details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the 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 apparatus 100, as shown in fig. 1, the lens driving apparatus 100 includes a base 1, a housing 3, a carrier 2, four reeds 4, and four suspension wires 5.

The chassis 1 includes a plate-like bottom plate 11, two side plates 12, a metal sheet 13, and two side circuit boards 14. Wherein, the bottom plate 11 is a rectangular flat plate, four corners are respectively provided with shoulders 111, the four shoulders 111 respectively extend away from the bottom plate 11 from the top surface of the bottom plate 11, the top surface of each shoulder 111 is respectively provided with a groove 112, the grooves 112 accommodate damping colloids 114, and the damping colloids 114 are connected with the four corners of the carrier 2.

The two side plates 12 are arranged in parallel at intervals, the bottom ends of the two side plates 12 are respectively connected with the top surface of the bottom plate 11 and are respectively close to the two side edges of the bottom plate 11, and the two side plates 12 are used for respectively limiting the movement range of the carrier 2. In practice, the side plates 12 and the bottom plate 11 are integrally injection molded, and the two side plates 12 and the bottom plate 11 have strong connection strength.

The metal sheet 13 is embedded in the base 1 and comprises a bottom metal sheet 131 and two sets of side metal sheets 132, wherein the bottom metal sheet 131 is embedded in the base plate 11 and comprises three parts which are mutually insulated, and the bottom metal sheet 131 can be electrically connected with an external power supply. The two sets of side metal sheets 132 are disposed perpendicular to the bottom metal sheet 131 and are respectively embedded in the two side plates 12, and bottom ends of the side metal sheets 132 are respectively electrically connected to the bottom metal sheet 131, and top ends of the side metal sheets are used for electrically connecting to the two side circuit boards 14.

Specifically, each set of side metal sheets 132 includes two metal strips, respectively, and the bottom ends of one of the two sets of side metal sheets 132 are electrically connected to a portion of the bottom metal sheets 131, respectively, and the top ends extend away from the bottom plate 11 and beyond the top surfaces of the side plates 12. The bottom ends of the other metal strip of the two sets of side metal sheets 132 are electrically connected to the other two portions of the bottom metal sheet 131, respectively, and the top ends also extend away from the bottom plate 11 beyond the top surfaces of the side plates 12.

The two side metal sheets 132 and the bottom metal sheet 131 are integrally formed, and when in processing, the metal sheet 13 can be integrally placed in a mold, the base 1 is molded around the metal sheet 13, and the metal sheet 13 can be stably placed inside the base 1.

The two side circuit boards 14 are respectively attached to the inner surfaces of the two side boards 12 and are respectively electrically connected with the side circuit boards 14, specifically, a first group of coils are respectively arranged in the two side circuit boards 14, two ends of the first group of coils are respectively exposed to the outer surface of the side circuit boards 14 and form two connection points 141, the two connection points 141 respectively correspond to the top ends of the two metal strips on the top surfaces of the side boards 12 and are respectively electrically connected with the top ends of the two metal strips in a welding mode, and a closed loop is formed, namely, each group of side metal sheets 132 respectively electrifies the first group of coils in each group of side circuit boards 14. The side circuit board 14 is directly and electrically connected with the metal strip in the side plate 12, so that the power supply of an external circuit wire to the side circuit board 14 can be reduced, and the side circuit board 14 is attached to the side plate 12, so that the side circuit board 14 is stably and electrically connected with the metal strip in the side plate 12.

It should be understood that the top ends of the metal strips may be exposed on the inner surface or both sides of the side plate 12, and that the two connection points 141 of the side circuit board 14 are only required to be electrically connected with the two metal strips, and the metal strips are not limited to be exposed on the specific positions of the side plate 12, and the specific positions of the two connection points 141 of the side circuit board 14 are not limited. The two side circuit boards 14 may also be attached to the outer surfaces of the two side boards 12 without limiting the specific location of the two side circuit boards 14.

The outer surface of the side plate 12 is also provided with a protruding clamping block which can be clamped with the shell 3. Specifically, the housing 3 covers the outer portions of the two side plates 12 and has a locking groove, and the housing 3 is locked to the two side plates 12. The housing 3 forms an accommodating space in cooperation with the base plate 11 for accommodating the carrier 2.

The top surface of the bottom plate 11 is further stacked with a flexible circuit board 15 and a bottom circuit board 16, wherein the flexible circuit board 15 is stacked on the top surface of the bottom plate 11 and is electrically connected with the bottom metal sheet 131 in the bottom plate 11, and the flexible circuit board 15 is further provided with a plurality of sensors 151, and the plurality of sensors 151 are mounted on the top surface of the flexible circuit board 15 and are used for sensing the position of the carrier 2.

The bottom circuit board 16 is stacked on the top surface of the flexible circuit board 15, and is free from the plurality of sensors 151. The bottom circuit board 16 is electrically connected to the flexible circuit board 15 and internally provided with a second set of coils. The flexible circuit board 15 and the bottom circuit board 16 may be connected to the base plate 11 by means of bonding, clamping, bolts, etc., without limiting the specific connection manner of the flexible circuit board 15 and the bottom circuit board 16 to the base plate 11.

As a preferred scheme, the top surface of the bottom plate 11 is also provided with a plurality of positioning columns 113, the positioning columns 113 extend away from the bottom plate 11 from the top surface of the bottom plate 11, the flexible circuit board 15 and the bottom circuit board 16 are provided with a plurality of positioning holes, the plurality of positioning holes are respectively arranged in one-to-one correspondence with the positions of the plurality of positioning columns 113, and the plurality of positioning columns 113 penetrate into the plurality of positioning holes of the bottom circuit board 16 from the plurality of positioning holes of the flexible circuit board 15 respectively, so that the flexible circuit board 15 and the bottom circuit board 16 are conveniently positioned and connected with the bottom plate 11.

The carrier 2 is used for installing a lens, and can drive the lens to move along the direction of an optical axis so as to adjust the focal length of the lens, and can also drive the lens to move along the direction perpendicular to the optical axis so as to realize the anti-shake function. The carrier 2 is mounted between the two side plates 12 and located on the top surface of the bottom plate 11, and four corners of the carrier 2 are respectively connected with four damping colloids 114 on the bottom plate 11. The carrier 2 is provided with mounting grooves on both sides thereof, and the two mounting grooves are disposed opposite to the two side circuit boards 14, respectively. A side magnet 21 is mounted in each mounting slot, the side magnet 21 cooperating with a first set of coils in the side circuit board 14 to drive the carrier 2 to move in a direction perpendicular to the optical axis.

The bottom of the carrier 2 is also provided with a plurality of mounting grooves, each mounting groove is respectively provided with a bottom magnet 22, and the bottom magnets 22 and the second group of coils are matched to drive the carrier 2 to move along the optical axis direction so as to adjust the focal length of the lens. It should be understood that the side magnet 21 and the first set of coils may be combined to drive the carrier 2 to move in the optical axis direction to adjust the focal length of the lens, as required. The bottom magnet 22 cooperates with the second set of coils to drive the carrier 2 to move in a direction perpendicular to the optical axis, so as to realize anti-shake.

Four springs 4 are mounted at four corners of the carrier 2, and the four springs 4 are elastic and are respectively positioned at the top of the carrier. The four reeds 4 are also respectively connected with the top ends of the four suspension wires 5. The bottom ends of the four suspension wires 5 are respectively connected with the top surface of the bottom plate 11, when the carrier 2 moves, the reed 4 is pulled, and the reed 4 is stretched and then drives the carrier 2 to reset.

In the lens driving device 100 of the present utility model, the built-in circuit is provided in the chassis 1, and the built-in circuit extends into the two side plates 12, the side circuit board 14 is attached to the two side plates 12 and is electrically connected to the built-in circuit in the side circuit board 14, so that the structure is compact, and no additional circuit line is required to energize the side circuit board 14, so that the circuit is stable.

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 base for use in a lens driving apparatus, the base comprising:

the bottom plate is plate-shaped;

the two side plates are arranged in parallel at intervals and are connected with the top surface of the bottom plate;

a metal sheet, the metal sheet comprising:

the bottom metal sheet is embedded in the bottom plate and is used for being electrically connected with an external power supply; and

the two groups of side metal sheets are respectively embedded in the two side plates and are electrically connected with the bottom metal sheets;

the two side circuit boards are respectively attached to the two side plates and are respectively electrically connected with the two side metal sheets, and a first group of coils are respectively arranged on the two side circuit boards.

2. The base of claim 1, wherein each set of side metal sheets comprises two metal strips, the two metal strips being spaced apart and having bottom ends electrically connected to the bottom metal sheets, the two metal strips being electrically connected to the two ends of the first set of coils.

3. The base of claim 2, wherein the top ends of the two metal strips extend away from the bottom plate beyond the top ends of the side plates, and the side circuit board is provided with two connection points, and the two connection points are respectively electrically connected with the top ends of the two metal strips.

4. A base according to claim 3, wherein the side circuit board is attached to the inner surface of the side plate, and two connection points are located on the outer surface of the side circuit board and respectively correspond to the top ends of the two metal strips, and the two connection points are respectively electrically connected to the top ends of the two metal strips of each group of the side metal sheets by welding.

5. The base of claim 1, further comprising a flexible circuit board stacked on top of the base plate and electrically connected to the bottom metal sheet, the flexible circuit board being provided with a plurality of sensors for sensing a position of a carrier of the lens driving device.

6. The base of claim 5, further comprising a bottom circuit board stacked on top of and electrically connected to the flexible circuit board, the flexible circuit board having a second set of coils disposed therein.

7. The base of claim 6, wherein the top surface of the bottom plate is further provided with a plurality of positioning posts, and the flexible circuit board and the bottom circuit board are respectively provided with positioning holes for accommodating the positioning posts.

8. The base of claim 1, wherein the base plate is a rectangular plate and four corners are respectively provided with a convex shoulder, the shoulders are positioned on the top surface of the base plate, the top surface is provided with a groove, and damping colloid is accommodated in the groove.

9. The base of claim 1, wherein a clamping block is further provided on an outer side of the side plate, and is configured to be clamped with a housing of the lens driving device.

10. A lens driving apparatus, comprising:

the base of claim 6;

the shell covers the outer parts of the two side plates and is connected to the top surface of the bottom plate;

the carrier can be movably connected to the top surface of the bottom plate and is positioned between the two side plates, the carrier is provided with a side magnet and a bottom magnet, the side magnet is matched with the first group of coils to drive the carrier to move along the direction perpendicular to the optical axis, and the bottom magnet is matched with the second group of coils to drive the carrier to move along the direction of the optical axis;

a plurality of reeds connected to the top of the carrier; and

the bottom ends of the suspension wires are respectively connected with the bottom plate, and the top ends of the suspension wires are respectively connected with the reeds.

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