CN219227384U - Lens driving mechanism and base thereof - Google Patents

Abstract

The utility model discloses a lens driving mechanism and a base thereof, wherein the lens driving mechanism comprises a frame and a plurality of circuit boards, the side part of the frame is provided with a magnet, each circuit board is respectively arranged at the bottom of one side part of the frame and internally provided with a group of coils, two ends of each coil are respectively arranged at two ends of the circuit board, a first power-on pin and a second power-on pin are respectively formed at two ends of the circuit board so as to carry out power-on operation on the coils, the base is provided with an upper surface facing the frame and a lower surface far away from the frame, the upper surface is provided with a plurality of partition structures, and each circuit board is arranged between at least two partition structures and limited by at least two partition structures. The utility model can realize more stable combination of the circuit board and the base and has stronger universality by virtue of the unique matching design of the circuit boards and the base, saves processing cost and has wide commercial application prospect.

Description

Lens driving mechanism and base thereof

Technical Field

The utility model relates to the field of optical imaging, in particular to a lens driving mechanism 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 functions are provided with a lens driving module to drive optical components such as lenses to move, thereby achieving auto focus (autofocus) and optical anti-shake (Optical Image Stabilization, OIS) functions. Light can be imaged on a photosensitive element through the optical element.

As shown in fig. 1, these lens driving modules generally include a circuit board, which is generally shaped to match with the base and is mounted on the base, for example, in a substantially rectangular structure, and a set of coils are respectively disposed on four sides of the rectangular structure, for example, four coils are respectively disposed in front, back, left and right in fig. 1, and are matched with magnets above the coils after the coils are energized, so as to drive the magnets and a frame on which the magnets are mounted to perform movement in X and Y directions; four power-on pins are arranged at the edge of the inner side of the circuit board, and power-on operation is carried out on two coils which are oppositely arranged. However, when the circuit board is mounted on the base, gaps exist at some positions of the bottom, so that the circuit board is not stable enough, and coils with different sizes are required to be arranged according to frames with different sizes, so that the circuit board is poor in universality.

Disclosure of Invention

The present utility model is directed to a lens driving mechanism and a base thereof, which solve the above-mentioned problems of the prior art.

In order to solve the above-described problems, according to one aspect of the present utility model, there is provided a chassis of a lens driving mechanism including a frame provided with magnets at sides thereof, each of the circuit boards being disposed at bottoms of one side thereof and having a set of coils built therein, both ends of the coils being disposed at both ends of the circuit board and forming first and second power pins at both ends of the circuit board, respectively, to perform a power-on operation for the coils, the chassis having an upper surface facing the frame and a lower surface facing away from the frame, the upper surface being provided with a plurality of partition structures, each of the circuit boards being disposed between and limited by at least two of the partition structures.

In one embodiment, the base has a rectangular structure, a through hole matched with the lens is formed in the middle of the base, a plurality of circuit board mounting parts are formed around the through hole, and at least one partition structure is formed between every two adjacent circuit board mounting parts.

In one embodiment, the partition structure comprises a main partition extending in a straight line, wherein one end of the main partition extends to the periphery of the through hole and an extension line passes through the hole center of the through hole, and an extension line of the other end of the main partition passes through the corner of the base.

In one embodiment, the partition structure further comprises a U-shaped auxiliary partition arranged at the corner of the base, a notch is arranged at the corner of each circuit board, and the notches of every two adjacent circuit boards are combined to form a U-shaped notch matched with the U-shaped auxiliary partition.

In one embodiment, the base is provided with a base embedded metal sheet, each circuit board mounting portion is provided with two circuit interfaces, and two pins of the circuit board are respectively electrically connected with the base embedded metal sheet through the two circuit interfaces.

In one embodiment, four circuit board mounting parts are provided on the upper surface of the base on average and are used for mounting four circuit boards.

In one embodiment, the upper surface of the base is provided with three circuit board mounting parts on average and is used for mounting three circuit boards.

In one embodiment, the upper surface of the base is provided with two circuit board mounting parts on average and is used for mounting two circuit boards.

According to another aspect of the present utility model, there is provided a lens driving mechanism including a housing, a frame, a base, a carrier, and four circuit boards, the housing and the base being mated to form a chamber, the carrier being for mounting a lens and being disposed in the frame, the frame being disposed in the chamber and each being provided with at least one magnet on four sides, the four circuit boards being disposed on the base and being disposed under the four sides of the bottom of the frame, respectively, wherein each of the circuit boards is provided with a set of coils, both ends of the set of coils being disposed at both ends of the circuit board and forming first and second power-on pins at both ends of the circuit board, respectively, for performing a power-on operation for the coils, and the base having an upper surface facing the frame and a lower surface facing away from the frame, the upper surface being provided with a plurality of partition structures, each of the circuit boards being disposed between and being limited by the two partition structures.

In one embodiment, the base is the base in each embodiment described above.

The utility model can realize more stable combination of the circuit board and the base and has stronger universality, saves processing cost and has wide commercial application prospect through the unique matching design of the circuit boards and the base.

Drawings

Fig. 1 is a schematic plan view of a prior art planar coil.

Fig. 2 is an exploded perspective view of a lens driving mechanism according to an embodiment of the present utility model.

Fig. 3 is a perspective layout of the four circuit boards in fig. 2.

Fig. 4 is a perspective view of a base of one embodiment of the present utility model.

Fig. 5 is a front view of a base of one embodiment of the present utility model.

Fig. 6 is a plan view of three circuit boards of the lens driving mechanism according to an embodiment of the present utility model.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present utility model will be more clearly understood. 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.

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.

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.

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 and a base thereof, which can be used in devices such as a mobile phone, a tablet computer, a notebook computer, and the like.

Fig. 2 is an exploded perspective view of a lens driving mechanism 100 according to a first embodiment of the present utility model, fig. 3 is a perspective layout view of four circuit boards in fig. 2, fig. 4 is a perspective view of a chassis according to an embodiment of the present utility model, fig. 5 is a front view of a chassis according to an embodiment of the present utility model, as shown in fig. 2 to 5, the lens driving mechanism 100 includes a frame 10, a chassis 20, a carrier 30, and four circuit boards 40, the carrier 30 being used for mounting lenses and being disposed in the frame 10, the bottoms of the four sides of the frame 10 are respectively provided with at least one magnet 11, the four circuit boards 40 being disposed on the chassis 20 and being respectively disposed under the four sides of the frame 10, the chassis 20 having an upper surface 21 facing the frame 10 and a lower surface 22 facing away from the frame, the upper surface 21 being provided with a plurality of partition structures 211, each circuit board 40 being disposed between the two partition structures 211 and being limited by the two partition structures 211, wherein each circuit board 40 is disposed with a set of coils, both ends of which are respectively disposed at both ends of the circuit boards and two ends of the circuit boards are respectively formed with first and second energizing pins for the second energizing coils. After the coil is electrified, electromagnetic induction is formed with the magnet, and the magnetic field is acted by Lorentz force, so that the magnet can be driven to further drive the frame and the carrier for mounting the magnet to move, and the optical anti-shake function and/or the optical zooming function are realized.

It should be noted that, the group of coils of the present utility model mainly refers to a plurality of coils formed by winding one wire, for example, a shape of a circle, an ellipse, a substantially rectangle, a substantially square, etc. may be formed by winding one wire around, and a connection of the coils is formed by winding from inside to outside.

With continued reference to fig. 2, optionally, the lens driving mechanism 100 further includes a housing 60, an upper spring 70, a lower spring 80, and a suspension wire 90, where the housing 80 cooperates with the base 20 to form a receiving chamber, the carrier 30 is disposed in the frame 10, the upper spring 70 movably connects an upper surface of the frame 10 with an upper surface of the carrier 30, and the lower spring 90 movably connects a lower surface of the frame 10 with a lower surface of the carrier 30. The lower end of the suspension wire 90 is connected with the base 20, and the upper end of the suspension wire 90 is connected with the upper reed 70, so that a metal sheet embedded in the base can be electrically connected with the upper reed and then the carrier coil on the carrier through the suspension wire, thereby supplying power to the coil. The magnet 11 arranged on the side of the frame 10 cooperates with the carrier coil to drive the carrier to move along the optical axis direction to realize optical zooming, and the magnet 11 arranged on the side of the frame 10 cooperates with the coil on the circuit board to drive the carrier frame to move along the horizontal direction to realize the optical anti-shake function.

It should be noted that the carrier of the present utility model may not be provided with a coil, so that the optical anti-shake function is realized only by matching the magnet with the coil on the circuit board. Thus, the suspension wires may also be omitted or replaced by other means such as balls or the like.

As shown in fig. 3, four circuit boards 40 are combined together to form a generally rectangular circuit board and correspond to just four sides of the frame. It can be seen that the circuit board of the utility model is only a structure part of one quarter of the prior art, a coil is arranged in the circuit board, and two energizing pins are respectively arranged at two ends of the circuit board for energizing the coil. The circuit board can be used in combination according to the needs, and can save the material of the flat coil to a certain extent, thereby reducing the cost. The combined circuit board is shown in fig. 3, and the specific rotation direction of the circuit board can be adjusted according to the use condition. Compared with the existing circuit board, the circuit board has the advantages of less material consumption, low cost and stronger universality.

As shown in fig. 4, corresponding to the circuit board of fig. 3, the base 20 has a rectangular structure and is provided with a through hole 23 in the middle portion thereof to be fitted with a lens, the through hole 23 is preferably a circular through hole, four circuit board mounting portions 231 are formed around the through hole 23, and at least one partition structure 211 is formed between each adjacent two of the circuit board mounting portions 231. The four circuit boards 40 shown in fig. 3 are respectively mounted on the four circuit board mounting portions 231, and each circuit board 40 is just limited on the circuit board mounting portion 231 by two partition structures 211 on two sides, so that the circuit boards are prevented from shifting on a plane perpendicular to the optical axis, and meanwhile, the positioning function is also achieved in the mounting process, the mounting accuracy is ensured, and the mounting efficiency is improved.

Alternatively, the partition structure 211 includes a main partition 212 extending in a straight shape and a "U" shaped auxiliary partition 213 provided at a corner of the base, one end of the main partition 212 extending to the circular through hole 23 and an extension line of the main partition preferably passing through a hole center of the circular through hole, and the other end of the main partition 212 extending toward the corner of the base and an extension line thereof passing through the corner of the base. That is, the main partition 212 extends in a radial direction through which the circle passes and an extension line passes through a corner of the base. As can be seen in fig. 4, alternatively, four main partitions 212 are uniformly arranged on the upper surface of the base, with an angle of approximately 90 degrees between each two main partitions.

The "U" -shaped auxiliary partition 213 is disposed at a corner of the base 20 and connected to the main partition 212, and in particular, the "U" -shaped auxiliary partition 213 includes a bottom 2131 and two side portions 2132 protruding from both ends of the bottom 2131 to both sides, an angle of more than 90 degrees is formed between the two side portions 2132 and the bottom 2131 and extends to an edge of the base, while one end of the main partition 212 extends to a peripheral portion of the circular through hole, the other end of the main partition 212 extends to the "U" -shaped bottom 2131 of the auxiliary partition 213, correspondingly, a corner of each circuit board 40 is provided with a notch 41 and the notches 41 of every adjacent two circuit boards are combined to form a "U" -shaped notch 42 mated with the "U" -shaped auxiliary partition. When the circuit boards 40 are mounted on the base 20, each circuit board is mounted between the two main partitions 212 and is restrained at the corners by the two auxiliary partitions 213, so that each circuit board 40 is restrained by being enclosed by the main partitions 212 and the auxiliary partitions 213 on the side portions as a whole, and since an angle of approximately 90 is formed between the two main partitions, the two side edges of the circuit boards are not parallel to each other, that is, the circuit boards 40 are shaped such that the outer sides are large and the inner sides are small to form an approximately fan shape, and therefore, although the circuit boards are restrained without partitions on the through hole side of the base and the edge side opposite to the through hole, the circuit boards 40 are not displaced in the inner and outer directions. It can be seen that the circuit board is restrained from displacement in a plane perpendicular to the optical axis (i.e., a plane parallel to the base) by the design of the special shape of the circuit board and the provision of the special shape of the partition on the base, preventing the circuit board from moving at will on the base.

With continued reference to fig. 4-5, in one embodiment, the base 20 is provided with a base-embedded metal sheet 50, the base-embedded metal sheet 50 is disposed within the base 20 during the casting of the base, each circuit board mounting portion 231 is provided with two circuit interfaces 232, and two pins of each circuit board 40 are respectively electrically connected to the base-embedded metal sheet 50 through the two circuit interfaces 232, and the circuit interfaces 232 may be formed, for example, by punching holes in the base so that the base-embedded metal sheet is exposed to the upper surface of the base.

Alternatively, referring to fig. 3, in one embodiment, the circuit board 40 has an outer side 43 facing the outside of the lens driving mechanism and an inner side 44 facing the inside of the lens driving mechanism, the outer side 44 forming a plane, and the inner side 43 forming a curved surface, by which design it is ensured that the outer side of the circuit board can be parallel to the edge of the base, while also ensuring that a circular-like inner space can be formed when a plurality of circuit boards are looped to fit the circular through hole 23 of the base, as in the case shown in fig. 3-4.

It should be noted that, although each lens driving mechanism includes four circuit boards and four circuit board mounting portions are correspondingly disposed on the base in the above embodiment, in other embodiments, each lens driving mechanism may include more or less than four circuit boards, for example, three circuit boards, two circuit boards, and the like may be disposed, and at this time, three circuit board mounting portions, two circuit board mounting portions, and the like are also disposed on the base correspondingly.

For example, fig. 6 is a plan view of three circuit boards of a lens driving mechanism according to a second embodiment of the present utility model, which is different from the lens driving mechanism 100 described above in terms of the shape of the frame and the number of circuit boards 40, and specifically, the lens driving mechanism according to the embodiment includes a frame 10, a base 20, a carrier 30, and three circuit boards 40, the carrier 30 being for mounting a lens and being disposed in the frame 10, the frame 10 having three sides disposed in a triangular shape projected on the base, the bottoms of the three sides being each provided with at least one magnet 11, the three circuit boards 40 being disposed on the base 20 and being disposed below the three sides of the frame 10, respectively, wherein each circuit board 40 is provided with a set of coils having both ends disposed at both ends of the circuit board 40 and first and second power pins being formed at both ends of the circuit board 40, respectively, to power on the coils. In this embodiment, corresponding to the number of circuit boards 40, three circuit board mounting portions are also provided on the base, each of which is separated by a partition structure and limits each circuit board.

According to a third embodiment of the present utility model, similar to the lens driving mechanism 100 of the first embodiment, the lens driving mechanism of the third embodiment may further include a frame 10, a base 20, a carrier 30, and two circuit boards, the carrier 30 being used for mounting a lens and being disposed in the frame, the bottoms of four sides of the frame being respectively provided with at least one magnet, the two circuit boards being disposed on the base and being configured such that each circuit board is disposed under two of the sides of the frame, wherein each circuit board is provided with two sets of coils inside and is disposed under one of the sides of the frame respectively to be engaged with the magnets of the bottom of the frame and to drive the magnets and the frame to move when energized. In this embodiment, corresponding to the number of circuit boards 40, two circuit board mounting portions are also provided on the base, each of which is separated by a partition structure and limits each circuit board.

While the preferred embodiments of the present utility model have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the utility model. Such equivalents are also intended to fall within the scope of the claims appended hereto.

Claims (10)

1. The utility model provides a base of lens actuating mechanism, lens actuating mechanism includes frame and a plurality of circuit board, the lateral part of frame is equipped with the magnetite, every circuit board set up respectively in the bottom of one lateral part of frame and built-in a set of coil, the both ends of coil are arranged respectively in two tip of circuit board and in two tip of circuit board form first circular telegram pin and second circular telegram pin respectively in order to carry out circular telegram operation for this coil, its characterized in that, the base has towards the upper surface of frame and keep away from the lower surface of frame, the upper surface is equipped with a plurality of wall structures, every circuit board is arranged at least two between the wall structure and by at least two wall structure spacing.

2. The base of claim 1, wherein the base has a rectangular structure and is provided with a through hole in a middle portion thereof for engagement with a lens, a plurality of circuit board mounting portions are formed around the through hole, and at least one of the partition structures is formed between each adjacent two of the circuit board mounting portions.

3. The base of claim 2, wherein the partition structure comprises a main partition extending in a "straight" shape, wherein one end of the main partition extends to the periphery of the through hole and an extension line passes through the center of the through hole, and an extension line of the other end of the main partition passes through a corner of the base.

4. The base of claim 1, wherein the partition structure further comprises a "U" shaped auxiliary partition disposed at a corner of the base, wherein a notch is disposed at a corner of each circuit board, and the notches of each two adjacent circuit boards are combined to form a "U" shaped notch that mates with the "U" shaped auxiliary partition.

5. The base of claim 2, wherein the base is provided with a base embedded metal sheet, each circuit board mounting portion is provided with two circuit interfaces, and two pins of the circuit board are electrically connected with the base embedded metal sheet through the two circuit interfaces respectively.

6. The base according to claim 1, wherein four of the circuit board mounting portions are provided on an average on an upper surface of the base and are used for mounting four of the circuit boards.

7. The base according to claim 1, wherein an upper surface of the base is provided with three of the circuit board mounting portions on average and is used for mounting three of the circuit boards.

8. The base according to claim 1, wherein an upper surface of the base is provided with two of the circuit board mounting portions on average and is used for mounting two of the circuit boards.

9. The utility model provides a camera lens actuating mechanism, its characterized in that, camera lens actuating mechanism includes casing, frame, base, carrier and four circuit boards, the casing with the base cooperation forms the cavity, the carrier be used for installing the camera lens and set up in the frame, the framework is arranged in the cavity and respectively be equipped with at least one magnetite in four lateral parts, four circuit boards set up in on the base and arrange respectively four lateral parts below of frame bottom, wherein each the circuit board embeds a set of coil, the both ends of a set of coil are arranged respectively in two tip of circuit board and form first circular telegram pin and second circular telegram pin respectively in two tip of circuit board in order to carry out circular telegram operation for this coil, and the base has towards the upper surface of frame and keep away from the lower surface of frame, the upper surface is equipped with a plurality of wall structures, every circuit board is arranged between two wall structures and by two wall structures spacing.

10. A lens driving mechanism according to claim 9, wherein the mount is the mount according to any one of claims 1 to 5.

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