CN218998393U - Circuit board, frame assembly and lens driving mechanism - Google Patents

Abstract

The utility model discloses a circuit board, a frame assembly and a lens driving mechanism, wherein the circuit board comprises a first board body and a second board body, the first board body is of a flat ring shape and is provided with a built-in circuit, and the built-in circuit is used for being electrically connected with an external power supply; the bottom end of the second plate body is connected with the top surface of the first plate body in a welding mode, the top end of the second plate body extends along the direction perpendicular to the first plate body, and the built-in circuit extends into the second plate body; the coil is connected with the second plate body and is electrically connected with the built-in circuit. The circuit board comprises the first board body and the second board body, wherein the second board body is perpendicular to the first board body and is connected with the first board body in a welding mode, so that the connection strength of the second board body and the first board body can be enhanced, and the service life of the circuit board is ensured.

Description

Circuit board, frame assembly and lens driving mechanism

Technical Field

The present utility model relates to the field of electronic devices, and in particular, to a circuit board, a frame assembly, and a lens driving mechanism.

Background

With the development of electronic technology, portable consumer electronic products, such as mobile phones, palm game players, and technologies, are increasingly popular, and are developed toward convenient and light-weighted designs, so as to provide more choices for users.

At present, a circuit board of a mobile phone camera often needs to be bent, for example, in order to be convenient for electrically connecting a coil or in order to adapt to an assembly space of an inner frame of a lens driving mechanism and a movable support, a part of the circuit board needs to be bent into a required shape, and the bent circuit board has a certain stress, and the stress can enable the bent circuit board to move towards an original state, so that the stability of the circuit board is affected.

Disclosure of Invention

An object of the present utility model is to provide a circuit board, a frame assembly and a lens driving mechanism to solve the above-mentioned problems.

In order to solve the above technical problems, the present utility model provides a circuit board, the circuit board is applied to a lens driving mechanism, the lens driving mechanism includes a frame, a movable seat and a driving motor, the frame is ring-shaped, the movable seat is movably mounted in the frame and provided with a magnet, the driving motor is mounted in the movable seat, the circuit board includes:

the first plate body is in a flat ring shape and is provided with a built-in circuit, the built-in circuit is used for being electrically connected with an external power supply, and the first plate body is used for being connected with the bottom surface of the frame;

the bottom end of the second plate body is connected with the top surface of the first plate body in a welding mode, the top end of the second plate body extends along the direction perpendicular to the first plate body, the built-in circuit extends into the second plate body, and the second plate body is clamped with the side part of the frame;

the coil is connected with the second plate body and is electrically connected with the built-in circuit, and the coil is matched with the magnet to drive the movable seat to move.

In one embodiment, a plurality of the second plates are arranged at intervals along the circumferential direction of the first plate, and a plurality of the coils are respectively connected with at least part of the second plates and electrically connected with the built-in circuit.

In one embodiment, the first plate body is polygonal and includes a plurality of sides, and the second plate body is respectively located on top of the sides.

In one embodiment, the first plate body is a rectangular frame and includes four sides, the four second plate bodies are respectively located on top surfaces of the four sides, and the four coils are respectively connected with the four second plate bodies.

In one embodiment, the coil is connected to an inner surface of the second plate.

In one embodiment, the circuit board further includes a plurality of sensors, and a plurality of the sensors are respectively connected with at least part of the second board body and electrically connected with the built-in circuit.

In one embodiment, the plurality of sensors are located within the loops of the plurality of coils, respectively.

The utility model also relates to a frame assembly comprising:

the frame is rectangular and annular and is provided with four side plates, the four side plates are respectively provided with a mounting groove, the mounting groove comprises a first section and a second section, and the first section is formed by inwards sinking the outer surfaces of the side plates; the second section is formed by inward recessing of the inner wall of the first section; and

in the circuit board, the four second board bodies are respectively located at the first sections of the four side boards, and the coil is located at the second section.

In one embodiment, the four second plate bodies are respectively clamped with the inner walls of the four first sections.

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

the frame assembly described above;

the movable seat can be movably arranged in the frame and is provided with a magnet;

the driving motor is arranged in the movable seat; and

the elastic piece is connected with the movable seat and the frame;

the magnet is matched with the coil to drive the movable seat and the driving motor to move, and the elastic piece is operable to drive the movable seat to reset.

The circuit board comprises the first board body and the second board body, wherein the second board body is perpendicular to the first board body and is connected with the first board body in a welding mode, so that the connection strength of the second board body and the first board body can be enhanced, and the connection stability of the circuit board and the frame can be ensured. The second plate body and the frame joint are convenient for second plate body and frame quick assembly, also can increase the joint strength of second plate body and frame.

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

Fig. 3 is a perspective view of the assembled base, movable seat, frame, drive motor and spring of the embodiment of fig. 1.

Fig. 4 is an exploded view of the drive motor of the embodiment shown in fig. 1.

Fig. 5 is an exploded view of the movable mount, frame, spring and circuit board of the embodiment of fig. 1.

Fig. 6 is an assembly view of the movable base, frame, resilient member and circuit board of the embodiment of fig. 1.

Reference numerals: 100. a lens driving mechanism; 1. a circuit board; 11. a first plate body; 12. a second plate body; 121. a clamping groove; 13. a coil; 14. a sensor; 2. a frame; 21. a bottom plate; 22. a side plate; 23. a mounting groove; 231. a first section; 232. a second section; 233. a clamping block; 3. a movable seat; 31. a magnet; 4. a drive motor; 41. a housing; 411. a magnet group; 42. a carrier; 43. a base; 44. an upper reed; 45. a lower reed; 5. a base; 6. a housing; 7. an elastic member; 8. a flexible circuit board; 81. a first portion; 82. a second portion; 83. a third portion.

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 utility model relates to a lens driving mechanism 100, a frame assembly and a circuit board 1, wherein the frame assembly comprises the circuit board 1 and a frame 2, the frame 2 is clamped with the circuit board 1, the connection strength between the circuit board 1 and the frame 2 is increased, and the circuit board 1 is positioned and mounted on the frame 2. The circuit board 1 includes first plate body 11 and four second plate bodies 12, and first plate body 11 can be connected with outside power electricity, and four second plate bodies 12 set up perpendicularly and in frame 2 joint with first plate body 11, and second plate body 12 is connected with first plate body 11 through the welding mode, can strengthen the joint strength of second plate body 12 and first plate body 11, guarantee circuit board 1 and frame 2 stable connection.

Specifically, as shown in fig. 1, 2 and 3, the lens driving mechanism 100 includes a housing 6, a frame assembly, a movable base 3, a driving motor 4, an elastic member 7, a flexible circuit board 8 and a base 5, wherein the base 5 is rectangular plate-shaped and four sides are provided with four clamping portions. The casing 6 is a rectangular casing 41 with an opening at the bottom, and the bottom of the casing 6 is clamped with four clamping parts of the base 5 to form an accommodating space. The frame 2 is mounted in a ring of the base 5 and inside the accommodation space, and the housing 6 covers the outside of the frame 2. The frame 2 is ring-shaped and includes a rectangular bottom plate 21 and side frames. The bottom plate 21 is caught in the ring of the base 5. The side frames extend away from the bottom plate 21 from the top surface of the bottom plate 21 and comprise four end-to-end side plates 22, and the four side plates 22 are respectively located on four side portions of the base 5 and are spaced from the edge of the bottom plate 21 by a distance.

In addition, the four side plates 22 are respectively provided with mounting grooves 23 that accommodate the four second plate bodies 12. Specifically, the mounting groove 23 includes a first section 231 and a second section 232, the first section 231 being recessed inwardly from the outer surface of the side plate 22. The second section 232 is formed by radially recessing the inner wall of the first section 231, and the second section 232 extends to the inner surface of the side plate 22, i.e. the second section 232 is a through slot and has a smaller size than the first section 231.

The four side plates 22 of the bottom plate 21 are respectively provided with an avoidance groove, the four avoidance grooves are respectively recessed from the outer side surface of the bottom plate 21 toward the inside and are respectively communicated with the first sections 231 of the four mounting grooves 23, and the avoidance grooves penetrate through the bottom plate 21 along the thickness direction of the bottom plate 21 for avoiding the four second plate bodies 12. Specifically, the first plate 11 is annular and is mounted on the bottom surface of the frame 2, and the first plate 11 is attached to the bottom surface of the bottom plate 21, that is, the first plate 11 is located between the bottom surface of the bottom plate 21 and the base, and is connected by bonding, clamping or welding, so that the specific connection mode of the first plate 11 and the bottom plate 21 is not limited. The four second plates 12 are respectively connected with the top surface of the first plate 11 and extend away from the first plate 11 along the axial direction, and the four second plates 12 respectively extend from the four avoidance grooves into the first section 231 of the mounting groove 23. The inner surface of each first plate 11 is further provided with a coil 13, each coil 13 being located in a second section 232, respectively.

In the embodiment shown in fig. 5, the first plate 11 is in the shape of a flat rectangular ring and has four sides, and the first plate 11 is stacked on top of the base 5, i.e. the first plate 11 is located between the base 5 and the bottom plate 21 of the frame 2. The four second plate bodies 12 are welded to the top surfaces of the four side edges, respectively. It should be appreciated that the first plate 11 may also be looped around the exterior of the frame 2 or otherwise connected to the frame 2. The circuit board 1 is provided with a built-in circuit which extends from the first board 11 to the second board 12, is electrically connected to the coil 13 on the second board 12, and can energize the coil 13.

In addition, the first plate 11 may be polygonal ring-shaped or other shapes, the second plate 12 may be two, three, five or more, and the plurality of second plates 12 may be arranged at intervals along the circumference of the first plate 11 or may be arranged on top of the plurality of sides of the first plate 11. Each second plate 12 may be provided with a coil 13, respectively, or at least two second plates 12 may be provided with coils 13, that is, the number of coils 13 and the number of second plates 12 may not be in a one-to-one correspondence, as long as the number of coils 13 can meet the motion requirement of the driving movable seat 3.

Alternatively, the four side plates 22 are provided with mounting grooves including a first section formed by recessing the inner surface of the side plate 22 toward the outside, and a second section formed by recessing the inner wall of the first section toward the outside to the outer surface. The second plate 12 is mounted in the first section, and the coil 13 is mounted on the outer surface of the second plate 12 and is located in the second section 232.

The first board 11 is electrically connected to the flexible circuit board 8, and the flexible circuit board 8 may be electrically connected to an external power source, i.e. current may flow from the flexible circuit board 8, the first board 11, the second board 12 to the coil 13. In the prior art, the second plate 12 and the first plate 11 are integrally formed, and the second plate 12 and the first plate 11 are in a shape of an integral flat plate, when the second plate 12 is installed, the second plate 12 needs to be bent towards the top by approximately 90 degrees, and the second plate 12 can be broken in the bending process. In addition, in the process of long-time use, the second plate 12 is affected by original stress, and the second plate moves on the side plate 22, so that the coil 13 moves from the original position, the coil 13 needs to be matched with the corresponding magnet 31, and the matching action with the magnet 31 is affected after the coil 12 is misplaced. The second plate body 12 is welded with the first plate body 11, the original stress condition does not exist between the second plate body 12 and the first plate body 11, the second plate body 12 can be stably connected to the side plate 22, and the coil 13 is further stable to the side plate 22.

As shown in fig. 2 and 5, two opposite side walls of the first section 231 are respectively provided with a clamping block 233, and two sides of the second side plate 22 are respectively provided with a clamping groove 121, and the two clamping grooves 121 respectively accommodate the two clamping blocks 233, so that the connection stability of the second plate 12 and the side plate 22 can be increased. In addition, during installation, the two clamping blocks 233 can be respectively clamped into the two clamping grooves 121, so that the second plate body 12 can be conveniently positioned and installed in the first section 231, and the assembly speed of the second plate body 12 and the first section 231 is increased. Further, the first section 231 may be provided with a locking groove 121, and the second plate 12 may be provided with a locking piece 233 mounted in the locking groove 121, so that the locking method between the second plate 12 and the frame is not limited.

It should be understood that the frame 2 may be a square frame, the second plate 12 may be attached to an outer side or an inner side of the frame 2 and engaged with the outer side or the inner side of the frame 2, and the side plate 22 of the frame 2 may be provided with a mounting groove for mounting the coil 13. The specific shape of the frame 2 is not limited.

The flexible circuit board 8 is connectable to an external power source and energizes the coil 13 on the second plate body 12 via the circuit board 1. The flexible circuit board 8 includes three parts electrically connected to each other, and the first part 81 is ring-shaped and is fitted outside the side frame and is stacked on the top surface of the bottom plate 21. The second portion 82 is electrically connected to the first portion 81 and is located at the bottom of the movable base 3 for carrying the imaging chip. The third portion 83 is electrically connected to the first portion 81 and the first board body 11 of the circuit board 1 for energizing the circuit board 1.

The movable seat 3 is rectangular and annular, can be movably arranged in the side frame and can move in the side frame. The four side parts of the movable seat 3 are respectively provided with magnets 31, the magnets 31 of the four side parts are respectively arranged opposite to the four coils 13, and the movable seat 3 can be driven to move in the side frames by matching with the four coils 13.

The driving motor 4 includes a housing 41, a carrier 42, an upper reed 44, a lower reed 45, and a base 43, as shown in fig. 4, a bottom of the housing 41 is opened and covers a top surface of the base 43, and the housing 41 and the base 43 cooperate to form a space in which the carrier 42, the upper reed 44, and the lower reed 45 can be accommodated. In addition, another magnet group 411 is provided in the case 41, and the carrier 42 is ring-shaped and internally provided with a lens, and externally wound with a coil group. The coil assembly is electrically connected with the flexible circuit board 8, and after the coil assembly is electrified, the magnet assembly 411 can be matched to drive the carrier 42 to move along the optical axis direction, so that the focal length of the lens can be adjusted. The upper reed 44 and the lower reed 45 are each elastic, and one end of the upper reed 44 is connected to the inner wall of the housing 41, and the other end is connected to the top of the carrier 42. One end of the lower reed 45 is connected to the bottom of the carrier 42, and the other end is connected to the base 43. The upper reed 44 and the lower reed 45 cooperate to elastically connect the carrier 42 with the housing 41 and the base 43, and the carrier 42 moves to stretch or compress the upper reed 44 or the lower reed 45, so that the upper reed 44 and the lower reed 45 can restore the carrier 42 based on the elasticity of the upper reed and the lower reed 45.

It will be appreciated that the shapes of the respective components in the drive motor 4 are not limited, and for example, the shapes of the carrier 42, the upper reed 44, and the lower reed 45 may be set to any other shape as long as the lens can be driven to move and reset.

In the embodiment shown in fig. 5, four sensors 14 are also provided on the circuit board 1, the four sensors 14 being connected to the four second side plates 22, respectively, and being located in the loops of the four coils 13. The four sensors 14 are electrically connected with the built-in circuit in the circuit board 1, and can sense the position of the movable seat 3. It should be understood that more sensors 14 may be disposed at any other location on the second side plate 22 without limiting the number and specific location of the sensors 14.

The movable seat 3 and the frame 2 are restored by the elastic member 7. Specifically, as shown in fig. 6, the elastic member 7 includes four elastic wires having the same shape and uniform elasticity, and the four elastic wires are uniformly distributed at four corners of the movable seat 3. One end of each elastic member 7 is connected with the bottom of the frame 2, and the other end is connected with the bottom of the movable seat 3. After the movable seat 3 moves in the frame 2, part of the four elastic wires are stretched, the rest elastic wires are compressed, and the four elastic wires reset the movable seat 3 based on the elasticity of the four elastic wires, so that the movable seat 3 is elastically connected with the frame 2.

The circuit board 1 comprises the first board body 11 and the second board body 12, wherein the second board body 12 is vertically arranged with the first board body 11 and is connected with the first board body 11 in a welding mode, so that the connection strength of the second board body 12 and the first board body 11 can be enhanced, and the service life of the circuit board 1 is ensured. In addition, the second plate body 12 is clamped with the frame 2, so that the second plate body 12 and the frame 2 can be assembled quickly, and the connection strength of the second plate body 12 and the frame 2 can be increased.

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. The utility model provides a circuit board, the circuit board is applied to lens actuating mechanism, lens actuating mechanism includes frame, movable seat and driving motor, the frame is cyclic annular, movable seat movable mounting in the frame and be equipped with the magnetite, driving motor install in the movable seat, its characterized in that, the circuit board includes:

the first plate body is in a flat ring shape and is provided with a built-in circuit, the built-in circuit is used for being electrically connected with an external power supply, and the first plate body is used for being connected with the bottom surface of the frame;

the bottom end of the second plate body is connected with the top surface of the first plate body in a welding mode, the top end of the second plate body extends along the direction perpendicular to the first plate body, the built-in circuit extends into the second plate body, and the second plate body is clamped with the side part of the frame;

the coil is connected with the second plate body and is electrically connected with the built-in circuit, and the coil is matched with the magnet to drive the movable seat to move.

2. The circuit board of claim 1, wherein a plurality of said second plates are arranged at intervals along the circumferential direction of said first plate, and a plurality of said coils are respectively connected to at least a part of said second plates and electrically connected to said built-in circuit.

3. The circuit board of claim 2, wherein the first plate body is polygonal in shape and comprises a plurality of sides, and the plurality of second plate bodies are respectively positioned on top of the plurality of sides.

4. A circuit board according to claim 3, wherein the first board body is a rectangular frame and comprises four sides, the four second board bodies are respectively located on top of the four sides, and the four coils are respectively connected with the four second board bodies.

5. The circuit board of claim 4, wherein the coil is coupled to an inner surface of the second plate body.

6. The circuit board of claim 2, further comprising a plurality of sensors, wherein a plurality of the sensors are respectively coupled to at least a portion of the second board body and electrically coupled to the built-in circuit.

7. The circuit board of claim 6, wherein a plurality of said sensors are located within the loops of a plurality of said coils, respectively.

8. A frame assembly, comprising:

the frame is rectangular and annular and is provided with four side plates, the four side plates are respectively provided with a mounting groove, the mounting groove comprises a first section and a second section, and the first section is formed by inwards sinking the outer surfaces of the side plates; the second section is formed by inward recessing of the inner wall of the first section; and

the circuit board of any one of claims 5-7, four of said second plate bodies being located in said first sections of four of said side plates, respectively, said coil being located in said second sections.

9. The frame assembly according to claim 8, wherein the four second plates are respectively engaged with the inner walls of the four first sections.

10. A lens driving mechanism, characterized by comprising:

the frame assembly of claim 9;

the movable seat can be movably arranged in the frame and is provided with a magnet;

the driving motor is arranged in the movable seat; and

the elastic piece is connected with the movable seat and the frame;

the magnet is matched with the coil to drive the movable seat and the driving motor to move, and the elastic piece is operable to drive the movable seat to reset.

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