Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, which comprises a base, a frame, a carrier and a plurality of reeds, and the base is provided with a built-in circuit. And the frame is suspended above the base and is provided with a magnet group. The carrier is movably connected with the frame and is provided with at least two groups of coils, the carrier is used for installing a lens, and the coils are matched with the magnet groups to drive the carrier to move along the optical axis direction of the lens. At least part of the reeds are connected in series or in parallel with at least two groups of coils, and are electrically connected with the built-in circuit; and the plurality of reeds are elastically connected with the frame and the carrier and are used for driving the carrier to reset. The two groups of coils are electrically connected through the reeds, extra transition lines are not needed, wire grooves do not need to be arranged outside the carrier, the structure is simple, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical element drive technical field, especially relate to a lens drive mechanism. BACKGROUND

[0002] With the development of science and technology, nowadays many electronic devices (for example, smart mobile phone or digital camera) all have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more popular, and is developing towards the direction of convenience and thinning, in order to provide users with more choices.

[0003] Some electronic devices with photographing or recording function are provided with a lens driving device to drive the optical components of the lens to move, thereby achieving the functions of automatic focusing and optical anti-shake.

[0004] In the current lens driving mechanism, the two AF coils on the outer side of the carrier are connected by a transition wire. When the upper spring piece is powered, one of the upper spring pieces connects and powers the positive terminal of the first AF coil, the negative terminal of the first AF coil is connected with the positive terminal of the second AF coil through the transition wire, and the negative terminal of the second AF coil is connected with the powered suspension wire through the other upper spring piece, thereby forming a power supply loop. The entire power supply loop needs a current-carrying suspension wire, a current-carrying upper spring piece, two connected AF coils, a current-outflowing upper spring piece, and a current-outflowing suspension wire. The outer periphery of the carrier also needs to be provided with a wire slot to accommodate the power supply transition wire. The entire structure is complex to manufacture and install. SUMMARY

[0005] The utility model aims at providing a lens driving mechanism to solve the problems in the prior art.

[0006] To solve the above technical problems, the embodiment of the utility model provides a lens driving mechanism, which comprises:

[0007] A base, the base has built-in lines;

[0008] A frame, the frame is suspended above the base and is provided with a magnet group;

[0009] A carrier, the carrier is movably connected with the frame and is provided with at least two groups of coils, the carrier is used for installing a lens, and the coils are matched with the magnet group to drive the carrier to move along the optical axis direction of the lens;

[0010] A plurality of spring pieces, at least part of the spring pieces in the plurality of spring pieces are connected in series or parallel with the at least two groups of coils and are electrically connected with the built-in lines; the plurality of spring pieces are elastically connected with the frame and the carrier, and are used for driving the carrier to reset.

[0011] In one embodiment, of the three reeds, one reed is connected to both ends of the two sets of coils, and the other two reeds are respectively connected to both ends of the two sets of coils. The three reeds are respectively electrically connected to the built-in circuit.

[0012] In one embodiment, of the four reeds, the two ends of two reeds are respectively connected to the two ends of one set of coils, and the other two ends are electrically connected to the built-in circuit.

[0013] The two ends of the other two reeds are connected to the two ends of another set of coils, and the other two ends are electrically connected to the built-in circuit.

[0014] In one embodiment, the frame is a rectangular frame;

[0015] The carrier is located within the ring of the frame;

[0016] Of the three reeds, one of the reeds is located at the top or bottom of one side of the frame and is connected to both ends of the two sets of coils; the other two reeds are located at the two corners of the frame and are respectively connected to both ends of the two sets of coils.

[0017] In one embodiment, the frame is a rectangular frame, and the four reeds are located at the top or bottom of the frame at the four corners of the frame.

[0018] In one embodiment, some of the reeds are located at the top of the frame and the carrier and are connected in series or in parallel with the two sets of coils, while other reeds are located at the bottom of the frame and the carrier and are elastically connected to the frame and the carrier.

[0019] In one embodiment, some of the reeds are located at the bottom of the frame and the carrier and are connected in series or in parallel with the two sets of coils, while other reeds are located at the top of the frame and the carrier and are elastically connected to the frame and the carrier.

[0020] In one embodiment, the lens driving mechanism further includes a plurality of suspension wires, the bottom ends of which are connected to the base and the top ends of which are connected to the spring.

[0021] Furthermore, at least a portion of the top end of the suspension wire is electrically connected to the built-in circuitry, and the top end is electrically connected to at least a portion of the reed.

[0022] In one embodiment, the lens driving mechanism further includes a circuit board with a bottom coil. The bottom coil cooperates with the magnet assembly to drive the frame to move along a first direction and a second direction, wherein the first direction, the second direction, and the optical axis direction are perpendicular to each other.

[0023] In one embodiment, the circuit board is electrically connected to the built-in wiring.

[0024] The two sets of coils in this invention are electrically connected by springs, eliminating the need for additional transition wires or external wire grooves on the carrier. The structure is simple and easy to install. Attached Figure Description

[0025] Figure 1 , Figure 2 and Figure 3 These are exploded views of a lens driving mechanism according to an embodiment of this utility model.

[0026] Figure 4 yes Figure 1 The assembly diagram of the frame, magnet assembly, carrier, and reed in the illustrated embodiment.

[0027] Figure 5 yes Figure 2 The assembly diagram of the carrier, upper spring, and AF coil in the illustrated embodiment.

[0028] Figure 6 yes Figure 5 The assembly diagram of the upper spring and two sets of AF coils in the embodiment shown is illustrated.

[0029] Figure 7 This is an assembly diagram of two sets of AF coils and transition lines in the existing technology.

[0030] Reference numerals: 10. Lens drive mechanism; 1. Base; 2. Frame; 21. Magnet group; 3. Carrier; 31. AF coil; 32. Positive end; 33. Negative end; 4. Upper spring; 5. Lower spring; 6. Circuit board; 7. Suspension wire; 8. Housing; 9. Transition line; Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0032] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to mean “including, but not limited to”.

[0033] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are merely illustrative of the essential spirit of the technical solution of this utility model.

[0034] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0035] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0036] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0037] This utility model relates to a lens driving mechanism 10, which includes a base 1, a circuit board 6 stacked on the top surface of the base 1, a frame 2 located above the base 1, a carrier 3 for mounting the lens, multiple suspension wires 7, multiple springs and a housing 8.

[0038] Specifically, the base 1 is a rectangular plate with built-in wiring that can be electrically connected to an external power source.

[0039] The circuit board 6 is stacked on the top surface of the base 1 and connected to the built-in wiring in the base 1. The circuit board 6 has a bottom coil, which is also the OIS coil.

[0040] The bottom ends of the four suspension wires 7 are respectively connected to the four corners of the base 1, and the bottom ends of three of the suspension wires 7 are electrically connected to the built-in circuit.

[0041] The frame 2 is a rectangular ring and is suspended above the base 1. The frame 2 is equipped with a magnet group 21. The magnet group 21 cooperates with the bottom coil to drive the frame 2 to move along the first direction and the second direction. The first direction and the second direction are perpendicular to each other and perpendicular to the optical axis of the lens, which is the vertical direction.

[0042] The carrier 3 is located inside the ring of the frame 2 and is movably connected to the frame 2. The carrier 3 is provided with at least two sets of coils, which are also known as AF coils 31. These two sets of coils cooperate with the magnet group 21 to drive the carrier 3 to move along the optical axis of the lens.

[0043] Multiple reeds are elastic, and a portion of each reed is connected to the carrier 3, while the other portion is connected to the frame 2, for driving the carrier 3 to move and then reset.

[0044] In one embodiment, a portion of the reeds are located at the top of the frame 2 and the carrier 3, and are respectively connected to the bottom of the frame 2 and the carrier 3; this portion of the reeds is defined as the lower reeds 5. Three reeds are located at the top of the frame 2 and the carrier 3, and are respectively connected to the top of the frame 2 and the carrier 3; these three reeds are defined as the upper reeds 4.

[0045] Of the three upper spring plates 4, each is electrically connected to the top of one of the three suspension wires 7. One upper spring plate 4 is located on the top side of the frame 2 and is also connected to the positive terminal 32 of each of the two sets of coils. The negative terminal 33 of each of the two sets of coils is connected to the other two upper spring plates 4. In other words, the two sets of coils are connected in parallel.

[0046] Of course, in other embodiments, the two sets of coils can also be connected in series. For example, in the three upper spring plates 4 mentioned above, the two ends of the two sets of coils are connected in series through an upper spring plate 4, while the other two sets of upper spring plates 4 are connected to the positive and negative poles of the two sets of coils respectively to form a series structure.

[0047] In another embodiment, among the multiple reeds, a portion of the lower reeds 5 are located at the bottom of the carrier 3 and the frame 2 and connected to the carrier 3 and the frame 2, and four upper reeds 4 are located at the top of the carrier 3 and the frame 2. Among the four upper reeds 4, the two ends of two upper reeds 4 are connected to the positive terminal 32 and the negative terminal 33 of one set of coils, respectively, and the two ends of the other two reeds are connected to the positive terminal 32 and the negative terminal 33 of another set of coils. The four upper reeds 4 are electrically connected to four suspension wires 7, and the four suspension wires 7 are electrically connected to the built-in circuits.

[0048] The four upper spring plates 4 are preferably disposed at the top of the four corners of the frame 2 and are disposed corresponding to the four suspension wires 7.

[0049] Of course, in other embodiments, the base 1 can also be configured as a circular plate, and the frame 2 can also be configured as a circular frame, with multiple suspension wires 7 arranged along the edge of the base 1, and multiple springs located at the top of the frame 2. In the multiple sets of coils, the positive terminal 32 and the negative terminal 33 of each set of coils are electrically connected to two springs respectively.

[0050] In the above embodiments, the lower spring 5 can also be connected in series or in parallel with the two sets of coils, and the lower spring 5 is electrically connected to the suspension wire 7. The upper spring 4 is elastically connected to the frame 2 and the carrier 3.

[0051] The bottom of the outer shell 8 is open and covers the outside of the frame 2 and the four suspension wires 7. The bottom of the outer shell 8 is connected to the base 1, which serves as a protective function.

[0052] In the prior art, the two AF coils 31 on the outer side of the carrier 3 are connected by a connecting transition line 9, and a wire groove needs to be provided on the outer periphery of the carrier 3 to accommodate the energized transition line 9, making the entire structure relatively complex to manufacture and install. In contrast, the two sets of coils of this utility model are electrically connected by a spring, eliminating the need for an additional transition line 9 and a wire groove on the outside of the carrier 3, resulting in a simple structure and convenient installation.

[0053] The preferred embodiments of the present invention have been described in detail above, but it should be understood that, if necessary, aspects of the embodiments can be modified to utilize aspects, features, and concepts from various patents, applications, and publications to provide other embodiments.

[0054] In light of the detailed description above, these and other changes can be made to the embodiments. Generally, the terminology used in the claims should not be considered limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

[0055] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A lens driving mechanism, characterized in that, The lens driving mechanism includes: The base has built-in wiring; A frame, which is suspended above the base and is equipped with a magnet assembly; The carrier is movably connected to the frame and is provided with at least two sets of coils. The carrier is used to mount the lens, and the coils cooperate with the magnet group to drive the carrier to move along the optical axis of the lens. Multiple reeds, at least some of which are connected in series or in parallel with at least two sets of coils and electrically connected to the built-in circuit; the multiple reeds are elastically connected to the frame and the carrier for driving the carrier to reset.

2. The lens driving mechanism according to claim 1, characterized in that, Of the three reeds, one reed is connected to both ends of the two sets of coils, and the other two reeds are respectively connected to both ends of the two sets of coils. The three reeds are electrically connected to the built-in circuit.

3. The lens driving mechanism according to claim 1, characterized in that, Of the four reeds, the two ends of two reeds are respectively connected to the two ends of one set of coils, and the other two ends are electrically connected to the built-in circuit. The two ends of the other two reeds are connected to the two ends of another set of coils, and the other two ends are electrically connected to the built-in circuit.

4. The lens driving mechanism according to claim 2, characterized in that, The frame is a rectangular frame; The carrier is located within the ring of the frame; Of the three reeds, one of the reeds is located at the top or bottom of one side of the frame and is connected to both ends of the two sets of coils; the other two reeds are located at the two corners of the frame and are respectively connected to both ends of the two sets of coils.

5. The lens driving mechanism according to claim 3, characterized in that, The frame is a rectangular frame, and the four reeds are located at the top or bottom of the frame at the four corners of the frame.

6. The lens driving mechanism according to claim 1, characterized in that, Some of the springs are located at the top of the frame and the carrier and are connected in series or in parallel with the two sets of coils, while other springs are located at the bottom of the frame and the carrier and are elastically connected to the frame and the carrier.

7. The lens driving mechanism according to claim 1, characterized in that, Some of the springs are located at the bottom of the frame and the carrier and are connected in series or in parallel with the two sets of coils, while other springs are located at the top of the frame and the carrier and are elastically connected to the frame and the carrier.

8. The lens driving mechanism according to claim 1, characterized in that, The lens driving mechanism also includes multiple suspension wires, the bottom ends of which are connected to the base and the top ends of which are connected to the spring. Furthermore, at least a portion of the top end of the suspension wire is electrically connected to the built-in circuitry, and the top end is electrically connected to at least a portion of the reed.

9. The lens driving mechanism according to claim 1, characterized in that, The lens driving mechanism also includes a circuit board with a bottom coil. The bottom coil works with the magnet group to drive the frame to move along a first direction and a second direction. The first direction, the second direction and the optical axis are perpendicular to each other.

10. The lens driving mechanism according to claim 9, characterized in that, The circuit board is electrically connected to the built-in circuitry.

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