CN220419655U - 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 plastic part, a built-in circuit and a circuit board, wherein a plurality of layers of metal sheets are embedded in the plastic part, and at least one part of the metal sheets positioned on the top layer is exposed on the top surface of the plastic part; at least one part of the built-in circuit is positioned in the plastic part and is electrically connected with the plurality of layers of metal sheets; the circuit board covers the top surface of the plastic part and is electrically connected with the metal sheet positioned on the top layer. The base of the utility model uses the multilayer metal sheet to replace the etching process, so that the processing flow of the base can be reduced, the processing is convenient, the operation is stable, the thickness of the base can be reduced, and the light weight of the lens driving device can be improved.

Description

Lens driving device and base thereof

Technical Field

The present utility model relates to the field of optical driving, and in particular, to a lens driving device 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 device is generally used to drive the lens to move along the optical axis direction so as to adjust the focal length.

The lens driving device 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 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, as electronic devices become more sophisticated, the volume of the lens driving apparatus is required to be smaller and more stable, and thus, various sophisticated lens driving apparatuses are required to be researched to meet market demands.

Disclosure of Invention

The utility model aims to provide a lens driving device and a base thereof, wherein the lens driving device is small in size and can meet market demands.

To solve the above technical problem, embodiments of the present utility model provide a base, which is applied to a lens driving device, including:

the plastic part is embedded with a plurality of layers of metal sheets, and at least one part of the metal sheets positioned on the top layer is exposed to the top surface of the plastic part;

the built-in circuit is at least partially positioned in the plastic part and is electrically connected with the plurality of layers of metal sheets; and

and the circuit board is covered on the top surface of the plastic part and is electrically connected with the metal sheet positioned on the top layer.

In one embodiment, the metal sheet on the top layer includes a plurality of metal strips arranged in an insulated manner, and at least one of the metal strips is electrically connected to the circuit board. In one embodiment, the plastic part is further provided with a containing groove, and the containing groove is concavely formed from the top surface of the plastic part;

the base also comprises a control chip, wherein the control chip is connected to the top surface of the circuit board and is positioned in the accommodating groove.

In one embodiment, a plurality of control chips are arranged at intervals, are connected with the bottom surface of the circuit board and are positioned in the accommodating groove.

In one embodiment, a plurality of first electrode pads are further disposed in the circuit board, and the plurality of first electrode pads are electrically connected with a part of the control chip and are exposed to the top surface of the circuit board.

In one embodiment, a bottom coil is further disposed in the circuit board, and the bottom coil is electrically connected to another part of the control chip.

In one embodiment, the receiving slot extends through the plastic part.

In one embodiment, the built-in circuit is connected with the plastic part in an injection molding mode.

In one embodiment, the top surface of the metal sheet on the top layer is flush with the top surface of the plastic part.

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

the base;

the frame is positioned above the base and provided with a plurality of magnets;

the carrier is movably arranged in the frame, is used for mounting the lens and is provided with an axial coil;

an upper reed positioned on top of the frame and the carrier and connected with the frame and the carrier, the upper reed being electrically connected with the axial coil;

the lower reed is positioned at the bottoms of the frame and the carrier and is connected with the frame and the carrier;

the top ends of the suspension wires are connected with the upper reed, and the bottom ends of the suspension wires extend out of the bottom of the frame, are connected with the base and are electrically connected with the built-in circuit.

The base of the utility model uses the multilayer metal sheet to replace the etching process, so that the processing flow of the base can be reduced, the processing is convenient, the operation is stable, the thickness of the base can be reduced, and the light weight of the lens driving device can be improved.

Drawings

Fig. 1, 2 and 3 are exploded views of a lens driving mechanism according to an embodiment of the present utility model.

Fig. 4 is a perspective view of the base of the lens driving mechanism of the embodiment shown in fig. 1.

Fig. 5 is an exploded view of the base of the embodiment of fig. 4.

Fig. 6 is a perspective view of the built-in wiring of the first electrode pad, the second electrode pad, and the frame of one embodiment of the present utility model.

Reference numerals: 100. a lens driving device; 1. a base; 11. a plastic part; 12. a circuit board; 13. a metal sheet; 14. a receiving groove; 15. a control chip; 16. a first electrode sheet; 2. a frame; 21. a magnet; 22. a built-in circuit; 23. a second electrode sheet; 3. a carrier; 31. an axial coil; 4. an upper reed; 5. a lower reed; 7. a suspension wire; 8. 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 utility model relates to a lens driving device 100, which is convenient to process, small in structure and quite stable in operation. The lens driving apparatus 100 according to an embodiment of the present utility model is described in detail in the radial direction with reference to the accompanying drawings.

As shown in fig. 1 to 3, the lens driving apparatus 100 of this embodiment specifically includes a base 1, a frame 2, a carrier 3, four suspension wires 7, an upper reed 4, a lower reed 5, and a housing 8, wherein the base 1 is used to support the frame 2 and the carrier 3. The frame 2 can prevent lens shake. The carrier 3 is mounted in the frame 2 for focusing. The upper reed 4 and the lower reed 5 are used for driving the carrier 3 to reset. The suspension wires 7 are used for supporting the frame 2 to hang above the base 1.

The base 1 includes a plastic part 11, a built-in circuit and a circuit board 12, in the embodiment of fig. 1 and 3, the plastic part 11 is injection molded to form a flat plate, and a plane of the plastic part 11 is perpendicular to an optical axis of the lens, and the base 1 is generally required to be fixedly connected to an inside of the electronic device. It should be understood that in other embodiments, the plastic member 11 may have other shapes, for example, a circular plate shape or an irregular shape, and the shape of the base 1 may be set as required.

The built-in circuit is embedded in the plastic part 11, specifically, a part of the built-in circuit is positioned at the bottom of the plastic part and can be electrically connected with an external power supply, a part of the built-in circuit is embedded in the plastic part, and a part of the built-in circuit is exposed to the top surface of the plastic part. In one embodiment, the built-in circuit may be provided as a plurality of metal sheets 13 as needed, and each metal sheet 13 may be electrically connected to each other or may be provided to be insulated from each other as needed. The metal sheets 13 are stacked in the plastic part along the optical axis direction, the metal sheet 13 on the top layer is exposed on the top surface of the plastic part, the top surface of the metal sheet 13 on the top layer is flush with the top surface of the plastic part, the metal sheet 13 on the top layer can be used for being electrically connected with the circuit board 12 and also can be used for being electrically connected with the suspension wires 7, and current is led into the axial coil 31 of the carrier 3 or the built-in circuit 22 of the frame 2 through the suspension wires 7.

Each layer of metal sheet 13 has different uses, for example, part of metal sheet 13 needs to be electrically connected with a plurality of suspension wires 7, respectively electrifies the axial coil 31 of the carrier 3 and the built-in coil of the frame 2, and the other part of metal sheet 13 also needs to be electrically connected with the circuit board 12, respectively electrifies the bottom coil, the control chip 15 or other parts in the circuit board 12, and the multi-layer metal sheet 13 can replace a plurality of circuits, so that external circuits are omitted. In addition, the top metal sheet 13 of the multi-layer metal sheet 13 is exposed on the top surface of the plastic part, so that the volume occupied in the plastic part can be reduced, and the thickness of the plastic part can be reduced, thereby reducing the volume of the base 1.

During processing, the multilayer metal sheet 13 with the built-in circuit can be placed in a die, then the plastic part is processed in an injection molding mode, the top metal sheet 13 of the multilayer metal sheet 13 is exposed to the top surface of the plastic part through a control process, the formed plastic part is not required to be further processed in an etching mode, the top metal sheet 13 is replaced by etching to form a connecting circuit, and the processing flow of the plastic part 11 is reduced. And the top metal sheet 13 is injected into the plastic part in an injection molding mode, a part of the top metal sheet 13 is embedded into the plastic part, the top surface of the plastic part is exposed at the top of the part, so that the top metal sheet 13 and the plastic part are stably connected, and the lens driving device 100 has stronger connection fastness, is not easy to fall off and abrade and can further ensure the stability of the lens driving device 100 relative to an etching process.

Each layer of metal sheet 13 of the multi-layer metal sheet 13 may include a plurality of metal strips, which may be arranged to be insulated from each other as needed, or may be arranged such that part of the metal strips are electrically connected and part of the metal strips are not connected. In the embodiment shown in the figures, the top metal sheet 13 has a plurality of metal strips arranged at intervals, wherein two metal strips extend to two corners of the plastic part and are electrically connected with the suspension wires 7 at the two corners, and a plurality of metal strips can be electrically connected with the circuit board 12. The arrangement of the metal sheet 13 of the top layer can be set according to the actual requirements, and the connection mode with the circuit board 12 can also be set according to the actual requirements.

The circuit board 12 covers the top surface of the plastic part and is electrically connected with the built-in circuit of the plastic part 11, in particular to the top metal sheet 13. The circuit board 12 is provided therein with a bottom coil, a plurality of first electrode pads 16, and a plurality of control chips 15. The plurality of first electrode pads 16 are close to the top surface of the circuit board 12, and the plurality of control chips 15 are connected to the bottom of the circuit board 12. The plastic part 11 is provided with a receiving groove 14, and as shown in fig. 4 and 5, the receiving groove 14 is formed by recessing the top surface of the plastic part 11, or may be formed by injection molding the plastic part 11, and a plurality of control chips 15 are located in the receiving groove 14.

Preferably, the accommodating groove 14 penetrates the plastic part 11 along the thickness of the plastic part, i.e. the accommodating groove 14 is a through groove. During processing, the circuit board 12 may be stacked on the top surface of the plastic component 11, and after the circuit board 12 is fixed with the plastic component 11, the plurality of control chips 15 are welded to the top surface of the circuit board 12 from the position of the accommodating groove 14. It is also possible to connect a plurality of control chips 15 to the circuit board 12 and then to connect the circuit board 12 to the plastic member 11.

The control chip 15 may be provided singly or in plural, and the number of the control chips 15 is not limited. Among the plurality of control chips 15, a part of the control chips 15 may be used to be connected with the bottom wire coil to control the current of the bottom wire coil, and another part of the control chips 15 may be electrically connected with the plurality of electrode pads to induce the induced potential of the plurality of electrode pads.

The plurality of first electrode pads 16 may be located at the bottom of the bottom coil, preferably at the top of the bottom coil, and exposed to the top surface of the circuit board 12, closer to the frame 2.

The frame 2 is approximately annular, the frame 2 extends around the optical axis direction of the lens and is suspended above the base 1, and a plurality of magnets 21 are arranged, wherein part of the magnets 21 are matched with the bottom coil to drive the frame 2 to move along the radial direction, and the other part of the magnets 21 are matched with the axial coil 31 on the carrier 3 to drive the carrier 3 to move along the optical axis direction.

The frame 2 is further provided with a built-in circuit 22 inside, and a plurality of second electrode plates 23 are further provided at the bottom, as shown in fig. 6, the plurality of second electrode plates 23 are electrically connected with the built-in circuit 22 and adhered to the bottom surface of the frame 2, among the plurality of second electrode plates 23, part of the second electrode plates 23 are electrically connected with each other, the other part of the second electrode plates 23 are arranged in an insulating manner, and a stopper is provided between the plurality of second electrode plates 23, which can restrict the second electrode plates 23 from moving in the radial direction. The plurality of second electrode plates 23 are respectively arranged opposite to the plurality of first electrode plates 16 along the optical axis direction, the second electrode plates 23 and the first electrode plates 16 form a capacitance structure, when the frame 2 moves along the radial direction, the relative areas of the first electrode plates 16 and the second electrode plates 23 change, thereby causing the capacitance of the capacitance structure to change, and the displacement of the frame 2 moving along the radial direction can be tested according to the change of the capacitance. It should be appreciated that the radial direction described above is perpendicular to the optical axis direction of the lens. When the lens is found to shake in the radial direction, the bottom coil and the magnet 21 of the frame 2 cooperate to drive the frame 2 to move in the radial direction so as to compensate the shake of the lens, thereby preventing the shake of the lens.

The carrier 3 is also ring-shaped and the lens can be mounted in the ring of the lens. The carrier 3 is movably mounted in the ring of the frame 2, and an axial coil 31 is arranged outside the carrier 3, and the axial coil 31 and a part of the magnet 21 of the frame 2 are matched to drive the carrier 3 to move along the optical axis direction, so that the focal length of the lens is adjusted.

The upper reed 4 and the lower reed 5 have elasticity, respectively, and the upper yellow sheet is positioned on the top of the frame 2 and the carrier 3 and is connected with the top of the frame 2 and the carrier 3. The lower reed 5 is located at the bottom of the frame 2 and the carrier 3, and is connected to the bottom of the frame 2 and the carrier 3. After the carrier 3 moves, the upper reed 4 and the lower reed 5 can drive the carrier 3 to reset in cooperation.

The four suspension wires 7 extend along the optical axis direction and are positioned at four corners of the base 1, the tops of the four suspension wires 7 are respectively connected with the upper reed 4, the bottoms of the four suspension wires 7 are connected with the base 1, and the lengths of the four suspension wires 7 are slightly larger than the sizes of the frame 2 and the carrier 3 along the optical axis direction, so that the frame 2 and the carrier 3 are suspended above the base 1. After the frame 2 moves, the four suspension wires 7 can also drive the frame 2 to reset.

Some of the four suspension wires 7 or all of the suspension wires 7 may be electrically conductive, and the bottom end is electrically connected with the built-in circuit of the base 1 and the top end is electrically connected with the upper reed 4. One part of the upper reed 4 is electrically connected to the built-in wiring 22 of the frame 2, and the other part is electrically connected to the axial coil 31 of the carrier 3. That is, the current of the built-in circuit of the base 1 can flow into the second electrode sheet 23 through the suspension wire 7, the upper reed 4 and the built-in line 22, and can also flow into the axial coil 31 through the suspension wire 7 and the upper reed 4.

The housing 8 has an accommodation space and is open at the bottom. The outer shell 8 covers the outer parts of the frame 2, the carrier 3, the upper reed 4, the lower reed 5 and the four suspension wires 7, and the bottom is connected with the base 1 for protecting external foreign matters from damaging the lens or affecting shooting.

The base 1 of the utility model uses the multilayer metal sheet 13 to replace the etching process, so that the processing flow of the base 1 can be reduced, the processing is convenient, the operation is stable, the thickness of the base 1 can be reduced, and the weight reduction of the lens driving device 100 can be improved.

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 mount for use with a lens driving apparatus, comprising:

the plastic part is embedded with a plurality of layers of metal sheets, and at least one part of the metal sheets positioned on the top layer is exposed to the top surface of the plastic part;

the built-in circuit is at least partially positioned in the plastic part and is electrically connected with the plurality of layers of metal sheets; and

and the circuit board is covered on the top surface of the plastic part and is electrically connected with the metal sheet positioned on the top layer.

2. The base of claim 1, wherein the metal sheet on the top layer comprises a plurality of metal strips disposed in an insulated manner from each other, at least one of the plurality of metal strips being electrically connected to the circuit board.

3. The base of claim 1, wherein the plastic part is further provided with a receiving groove, the receiving groove being recessed from a top surface of the plastic part;

the base also comprises a control chip, wherein the control chip is connected to the top surface of the circuit board and is positioned in the accommodating groove.

4. A base according to claim 3, wherein a plurality of said control chips are connected to the bottom surface of said circuit board and are located in said receiving slots.

5. The base of claim 4, wherein a plurality of first electrode pads are further disposed within the circuit board, the plurality of first electrode pads being electrically connected to a portion of the control chip and exposed to a top surface of the circuit board.

6. The base of claim 5, wherein a bottom coil is further disposed within the circuit board, the bottom coil being electrically connected to another portion of the control chip.

7. A base according to claim 3, wherein the receiving slot extends through the plastic member.

8. The base of claim 1, wherein the built-in circuit is connected to the plastic part by injection molding.

9. The base of claim 1, wherein the top surface of the metal sheet on the top layer is flush with the top surface of the plastic part.

10. A lens driving apparatus, comprising:

the base of claim 1;

the frame is positioned above the base and provided with a plurality of magnets;

the carrier is movably arranged in the frame, is used for mounting the lens and is provided with an axial coil;

an upper reed positioned on top of the frame and the carrier and connected with the frame and the carrier, the upper reed being electrically connected with the axial coil;

the lower reed is positioned at the bottoms of the frame and the carrier and is connected with the frame and the carrier;

the top ends of the suspension wires are connected with the upper reed, and the bottom ends of the suspension wires extend out of the bottom of the frame, are connected with the base and are electrically connected with the built-in circuit.