Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, which comprises a base, a frame and a carrier, and the frame is movably connected with the base and is provided with an induction magnet. The carrier comprises an annular frame, a mounting plate, a built-in metal frame and a sensing chip, and the annular frame is located in the frame, can move in the vertical direction and is used for mounting a lens. And the mounting plate is connected to the radial outer side of the annular frame and is positioned above the induction magnet. The built-in metal frame is located in the annular frame. The sensing chip is connected with the mounting plate and electrically connected with the built-in circuit, and the sensing chip is matched with the sensing magnet to detect the position of the annular frame.

Description

Technical Field

[0001] The utility model relates to the technical field of optical element driving, and particularly relates to a lens driving mechanism. Background Art

[0002] In recent years, with the development of technology, many current electronic devices have functions of taking pictures or videos. The use of these electronic devices is becoming more and more common, and they are developing towards a convenient, thin and light design direction to provide users with more choices.

[0003] In practice, in order to adapt to taking pictures in various scenarios, the lens needs to be continuously focused. In the prior art, a lens driving mechanism is generally used to drive the lens to move along the optical axis direction to adjust the focal length.

[0004] The lens driving mechanism includes a frame, a carrier, an upper spring piece, a lower spring piece and a base. Among them, the carrier is provided with a coil and is movably installed in the frame, and the carrier is used for installing the lens. The upper spring piece is elastic and is connected to the top of the frame and the top of the carrier. The lower spring piece is also elastic and is connected to the bottom of the carrier and the bottom of the frame. The upper spring piece and the lower spring piece movably connect the carrier in the frame. The frame is movably installed above the base and can move along the direction perpendicular to the optical axis of the lens to prevent the lens from shaking. The carrier is installed in the frame and can move along the optical axis direction of the lens to adjust the lens focal length.

[0005] In order to accurately control the movement of the carrier or the frame, it is also necessary to sense the specific position of the carrier in real time. However, in the prior art, it is not convenient to install the sensing chip on the carrier, and the detection result is unstable, which cannot meet the market demand. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a lens driving mechanism to solve the problems of the prior art.

[0007] To solve the above technical problems, an embodiment of the utility model provides a lens driving mechanism, including:

[0008] A base;

[0009] A frame, the frame is movably connected to the base and is provided with a sensing magnet;

[0010] A carrier, the carrier includes:

[0011] An annular frame, the annular frame is located in the frame and can move in the vertical direction for installing a lens;

[0012] A mounting plate, the mounting plate is connected to the radial outside of the annular frame and is located above the sensing magnet;

[0013] A built-in metal frame, the built-in metal frame being located within the annular frame; and

[0014] An induction chip, the induction chip being connected to the mounting plate and electrically connected to the built-in circuit, and the induction chip cooperating with the induction magnet to detect the position of the annular frame.

[0015] In one embodiment, the carrier further includes two sets of coils, the two sets of coils being respectively connected to the annular frame;

[0016] The built-in metal frame includes two pairs of metal strips, and each pair of the metal strips includes two metal strips arranged side by side in the vertical direction. One end of each metal strip is respectively electrically connected to the induction chip, and the other end is respectively electrically connected to the two sets of coils;

[0017] The frame is provided with a magnet group, and the magnet group cooperating with the two sets of coils can drive the carrier to move in the vertical direction.

[0018] In one embodiment, the mounting plate and the annular frame are integrally formed.

[0019] In one embodiment, the induction chip is provided with a plurality of welding grooves;

[0020] One end of each of the two pairs of metal strips is respectively located within the welding grooves.

[0021] In one embodiment, the lens driving mechanism further includes:

[0022] An upper spring piece, the upper spring piece being located at the top of the frame and connected to the frame and the annular frame. The upper spring piece includes an energized spring wire, and the energized spring wire is electrically connected to the induction chip; and

[0023] A lower spring piece, the lower spring piece being located at the bottom of the frame and connected to the frame and the annular frame;

[0024] The base is provided with a built-in circuit, and the built-in circuit is electrically connected to the upper spring piece.

[0025] In one embodiment, the upper spring piece includes:

[0026] A plurality of spring wires, the plurality of spring wires being connected to the frame and the carrier;

[0027] The plurality of energized spring wires are respectively located inside the plurality of spring wires and respectively connected to the plurality of spring wires.

[0028] In one embodiment, the lens driving mechanism further includes a plurality of suspension wires, the bottom ends of the plurality of suspension wires being connected to the base, and the top ends being connected to the upper spring piece;

[0029] The suspension wire is electrically connected to the built-in circuit.

[0030] In one embodiment, the base includes a bottom plate and a plurality of support columns, and the plurality of support columns are connected to the top surface edge of the bottom plate;

[0031] The frame is located within the plurality of support columns and is rollably connected to the bottom plate;

[0032] The built-in circuit is located within the bottom plate, and the connection ends of the built-in circuit extend to the top surfaces of the plurality of support columns and are electrically connected to the upper spring pieces.

[0033] In one embodiment, the mounting plate is provided with mounting holes;

[0034] The sensing chip includes a circuit board and a capacitor. The circuit board is located on the top surface of the mounting plate, and the capacitor is electrically connected to the circuit board and is located within the mounting holes.

[0035] In one embodiment, an avoidance groove is further provided on the top surface of the frame, and a mounting groove is provided on the bottom wall of the avoidance groove;

[0036] The sensing magnet is located within the mounting groove;

[0037] The mounting plate is located within the avoidance groove. Description of the Drawings

[0038] Figure 1 is an exploded view of a lens driving mechanism according to an embodiment of the present invention.

[0039] Figure 2 is an exploded view of a lens driving mechanism in an embodiment of the present invention.

[0040] Figure 3 and Figure 4 respectively are Figure 1 and Figure 2 assembly diagrams of the frame, the carrier, and the upper spring piece in the embodiment shown.

[0041] Figure 5 is Figure 1 and Figure 2 an exploded view of the frame, the carrier, and the upper spring piece in the embodiment shown.

[0042] Figure 6 is Figure 1 an exploded view of the frame and the carrier in the embodiment shown.

[0043] Figure 7 is Figure 1 a perspective view of the carrier in the embodiment shown.

[0044] Figure 8 and Figure 9 isFigure 1 Assembly diagram of the metal frame, coil and induction chip of the carrier in the illustrated embodiment.

[0045] Figure 10 Isometric view of the base of another embodiment of the present utility model.

[0046] Reference numerals: 100, lens driving mechanism; 1, base; 11, bottom plate; 12, support column; 13, ball; 2, frame; 21, avoidance groove; 22, mounting groove; 23, magnet group; 24, magnet; 3, carrier; 31, annular frame; 32, mounting plate; 321, mounting hole; 33, built-in metal frame; 34, induction chip; 35, circuit board; 36, capacitor; 37, welding groove; 38, coil; 4, upper reed; 41, reed wire; 42, energized reed wire; 5, lower reed; 6, driving circuit board; 7, suspension wire; 8, housing Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will elaborate on each embodiment of the present utility model with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present utility model, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in each claim of the present application can still be implemented.

[0048] Unless the context requires otherwise, throughout the specification and claims, the words "comprising" and its variants, such as "including" and "having", should be understood in an open, inclusive sense, that is, construed as "including, but not limited to".

[0049] The following will detail each embodiment of the present utility model with reference to the accompanying drawings to more clearly understand the objectives, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present utility model, but only to illustrate the essential spirit of the technical solutions of the present utility model.

[0050] References to "an embodiment" or "one embodiment" throughout the specification mean that the particular features, structures, or characteristics described in connection with the embodiment are included in at least one embodiment. Thus, the appearances of "in an embodiment" or "in one embodiment" throughout the specification do not necessarily all refer to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0051] 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 used in its inclusive sense of "and / or" unless the context clearly dictates otherwise.

[0052] In the following description, in order to clearly show the structure and working mode of the present utility model, many directional terms will be used for description. However, terms such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms rather than limiting terms.

[0053] The present utility model relates to a lens driving mechanism 100, which includes a base 1, a frame 2, and a carrier 3. Among them, the frame 2 is movably connected to the base 1 and is provided with an induction magnet 24. The carrier 3 includes an annular frame 31, a mounting plate 32, an internal metal frame 33, and an induction chip 34. The annular frame 31 is annular and is located within the frame 2. The annular frame 31 is used for mounting a lens and is arranged to be movable in the vertical direction, which is also the optical axis direction of the lens. The annular frame 31 drives the lens to move in the vertical direction to adjust the focal length of the lens.

[0054] The mounting plate 32 is connected to the radial outer side of the annular frame 31 and is located above the induction magnet 24. The internal metal frame 33 is located within the annular frame 31. The induction chip 34 is connected to the mounting plate 32 and is electrically connected to the internal circuit. The induction chip 34 cooperates with the induction magnet 24 to detect the position of the annular frame 31. In the present utility model, the induction chip 34 is arranged on the mounting plate 32 and is aligned with the induction magnet 24 of the frame 2 in the vertical direction. When the induction chip 34 moves in the vertical direction, it can sense the magnetic field of the induction magnet 24 to determine the specific position of the carrier 3. The induction chip 34 located above the induction magnet 24 can more sensitively detect the position of the annular frame 31, and the setting of the mounting plate 32 facilitates the installation of the induction chip 34.

[0055] As a preferred solution, the mounting plate 32 and the annular frame 31 are integrally formed. In practice, the mounting plate 32 and the annular frame 31 are integrally injection-molded, which is convenient for processing and saves costs.

[0056] In Figure 8In the illustrated embodiment, the annular frame 31 is generally in a rectangular ring shape, and two sets of coils 38 are further installed on the outer sides of the two opposite sides of the annular frame 31. The two sets of coils 38 are respectively electrically connected to the built-in metal frame 33. Specifically, the built-in metal frame 33 includes two pairs of metal strips. The two pairs of metal strips are located inside the two opposite sides of the annular frame 31 and are respectively arranged opposite to the two sets of coils 38. Each pair of metal strips includes two juxtaposed metal strips along the vertical direction, and one ends of the two metal strips of each pair of metal strips are respectively electrically connected to the induction chip 34, and the other ends of the two metal strips are respectively electrically connected to the two ends of the coil 38. That is to say, after the metal frame is electrified, each pair of metal strips charges each coil 38 respectively. The two metal strips of each pair of metal strips are juxtaposed along the vertical direction, which can also improve the strength of the annular frame 31.

[0057] The frame 2 is provided with two magnet groups 23 and a magnet 24, wherein the two magnet groups 23 cooperate with the two sets of coils 38 respectively to drive the carrier 3 to move in the vertical direction. In some other embodiments, the carrier 3 can also be driven to move in the vertical direction by other means, such as a piezoelectric mechanism, etc. The present invention does not limit the specific manner of driving the carrier 3 to move.

[0058] The top surface of the base 1 is further provided with a driving circuit board 6. Another set of coils is provided inside the driving circuit board 6. The coil cooperates with the above-mentioned one magnet 24 to drive the frame 2 to move in the first direction or the second direction. The first direction and the second direction are perpendicular to the vertical direction in pairs. The movement of the frame 2 is used to prevent camera shake.

[0059] As a preferred solution, the mounting plate 32 is provided with mounting holes 321. The induction chip 34 specifically includes a circuit board 35 and a capacitor 36. The circuit board 35 is located on the top surface of the mounting plate 32, and the capacitor 36 is electrically connected to the bottom surface of the circuit board 35 and is located in the mounting holes 321, so that the induction chip 34 is more stable.

[0060] In some embodiments, the top surface of the frame 2 is further provided with an avoidance groove 21, and the bottom wall of the avoidance groove 21 is provided with a mounting groove 22. The induction magnet 24 is located in the mounting groove 22. The mounting plate 32 is located in the avoidance groove 21, and the avoidance groove 21 is used to avoid the mounting plate 32.

[0061] The lens driving mechanism 100 further includes an upper spring piece 4 and a lower spring piece 5. The upper spring piece 4 is located at the top of the frame 2 and is connected to the frame 2 and the annular frame 31. The upper spring piece 4 includes four spring wires 41. The four spring wires 41 are respectively located at the four corners of the frame 2, and one energized spring wire 42 extends out from the inner sides of two of the spring wires 41. The energized spring wires 42 are respectively electrically connected to the induction chip 34.

[0062] It should be understood that in other embodiments, the upper spring piece 4 can also be set in other shapes, as long as there are two energized spring wires 42 electrically connected to the induction chip 34 to energize the induction chip 34.

[0063] The lower spring piece 5 is located at the bottom of the frame 2 and is connected to the frame 2 and the annular frame 31. The lower spring piece 5 and the upper spring piece 4 are respectively elastic and can assist the carrier 3 to reset after movement.

[0064] The circuit board 35 is provided with six welding grooves 37, and the six welding grooves 37 are evenly distributed at both ends of the circuit board 35. Four of the welding grooves 37 are used for welding two pairs of metal strips, and the other two welding grooves 37 are used for welding the above two energized spring wires 42.

[0065] In addition, an internal circuit is provided in the base 1, and the internal circuit is electrically connected to the upper spring piece 4.

[0066] In a specific embodiment, as Figure 2 shown, the lens driving mechanism 100 further includes four suspension wires 7. The bottom ends of the plurality of suspension wires 7 are connected to the base 1, and the top ends are connected to the upper spring piece 4. The four suspension wires 7 are also electrically connected to the internal circuit. After the internal circuit is energized, the current can flow through the suspension wires 7, the upper spring piece 4, and the induction chip 34 into two sets of coils 38 outside the carrier 3.

[0067] In another set of embodiments, the base 1 includes a bottom plate 11 and four support columns 12. The four support columns 12 are connected to the top surface edge of the bottom plate 11. The top surface of the bottom plate 11 is provided with four ball grooves, and the frame 2 is located within the plurality of support columns 12 and the bottom surface of the frame 2 is also provided with four ball grooves. Four balls 13 are respectively located in the ball grooves of the bottom plate 11 and the frame 2, so that the frame 2 is rollably connected to the bottom plate 11.

[0068] The internal circuit is located in the bottom plate 11 and the connection end of the internal circuit extends to the top surfaces of at least two of the support columns 12 and is electrically connected to two of the spring wires 41 of the upper spring piece 4 that have the energized spring wires 42. In this embodiment, after the internal circuit is energized, the current can directly flow from the upper spring piece 4 into the induction chip 34, and the induction chip 34 channels the current for the coil 38 group of the carrier 3.

[0069] The lens driving mechanism 100 further includes a housing 8. The housing 8 covers the outside of the frame 2, the upper spring piece 4, the lower spring piece 5, and the suspension wires 7 or the support columns 12, and is connected to the bottom plate 11 of the base 1 for protecting the frame 2 and the carrier 3.

[0070] In addition, the driving circuit board 6 is also electrically connected to the internal circuit. After the internal circuit is energized, it can also channel the current for the coil 38 in the driving circuit board 6.

[0071] The preferred embodiments of the present utility model have been described in detail above. However, it should be understood that if necessary, aspects of the embodiments can be modified to adopt aspects, features, and concepts of various patents, applications, and publications to provide additional embodiments.

[0072] In view of the foregoing detailed description, these and other changes can be made to the embodiments. Generally speaking, in the claims, the terms used should not be construed as being 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 to which these claims are entitled.

[0073] Those of ordinary skill in the art can understand that the above-described embodiments are specific embodiments for implementing the present utility model, and in actual applications, various changes can be made to them in form and details without departing from the spirit and scope of the present utility model.

Claims

1. A lens driving mechanism, characterized in that, Comprising: Base; Frame, which is movably connected to the base and is provided with induction magnets; Carrier, the carrier comprising: Annular frame, which is located within the frame and is movable in the vertical direction for mounting a lens; Mounting plate, which is connected to the radial outer side of the annular frame and is located above the induction magnets; Built-in metal frame, which is located within the annular frame; and Induction chip, which is connected to the mounting plate and is electrically connected to the built-in metal frame, and the induction chip cooperates with the induction magnets to detect the position of the annular frame.

2. The lens driving mechanism according to claim 1, wherein The carrier further comprises two sets of coils, and the two sets of coils are respectively connected to the annular frame; The built-in metal frame comprises two pairs of metal strips, and each pair of the metal strips comprises two metal strips arranged side by side in the vertical direction, one end of each metal strip is respectively electrically connected to the induction chip, and the other end is respectively electrically connected to the two sets of coils; The frame is provided with a magnet group, and the magnet group cooperates with the two sets of coils to drive the carrier to move in the vertical direction.

3. The lens driving mechanism according to claim 2, characterized in that, The mounting plate and the annular frame are integrally formed.

4. The lens driving mechanism according to claim 2, characterized in that, The induction chip is provided with a plurality of welding grooves; One end of the two pairs of metal strips is respectively located within the welding grooves.

5. The lens driving mechanism according to claim 1, characterized in that The lens driving mechanism further comprises: Upper reed, which is located at the top of the frame and is connected to the frame and the annular frame, the upper reed comprises energized reed wires, and the energized reed wires are electrically connected to the induction chip; and Lower reed, which is located at the bottom of the frame and is connected to the frame and the annular frame; An internal circuit is provided within the base, and the internal circuit is electrically connected to the upper reed.

6. The lens driving mechanism according to claim 5, characterized in that, The upper reed comprises: A plurality of reed wires, and the plurality of reed wires are connected to the frame and the carrier; The plurality of energized reed wires are respectively located inside the plurality of reed wires and are respectively connected to the plurality of reed wires.

7. The lens driving mechanism according to claim 5, characterized in that, The lens driving mechanism further comprises a plurality of suspension wires, the bottom ends of the plurality of suspension wires are connected to the base, and the top ends are connected to the upper reed; The suspension wires are electrically connected to the internal circuit.

8. The lens driving mechanism according to claim 5, wherein The base comprises a bottom plate and a plurality of support columns, and the plurality of support columns are connected to the top surface edge of the bottom plate; The frame is located within the plurality of support columns and is rollably connected to the bottom plate; The internal circuit is located within the bottom plate and the connection end of the internal circuit extends to the top surfaces of the plurality of support columns and is electrically connected to the upper reed.

9. The lens driving mechanism according to claim 1, wherein The mounting plate is provided with mounting holes; The induction chip comprises a circuit board and a capacitor, the circuit board is located on the top surface of the mounting plate, and the capacitor is electrically connected to the circuit board and is located within the mounting holes.

10. The lens driving mechanism according to claim 7, characterized in that, The top surface of the frame is further provided with an avoidance groove, and the bottom wall of the avoidance groove is provided with a mounting groove; The induction magnet is located within the mounting groove; The mounting plate is located within the avoidance groove.

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