Lens driving mechanism and frame thereof

Abstract

The utility model discloses a lens driving mechanism and a frame thereof, the frame comprises a frame body and a magnet strip, the frame body is provided with a mounting groove, one side wall of the mounting groove is an inclined plane, the inner wall of the mounting groove is provided with an accommodating groove, and the accommodating groove is adjacent to the inclined plane. The magnet strip is located in the installation groove and is provided with an avoiding notch, and the avoiding notch is matched with the inclined face.

Description

Technical Field

[0001] This utility model relates to the field of optical element driving technology, and in particular to a lens driving mechanism and its frame. Background Technology

[0002] A lens drive mechanism generally includes a base, a frame, and a carrier for mounting the lens. The frame and the base are connected by ball bearings, and the carrier is movably connected to the frame.

[0003] However, the frame and the base are movably connected. The frame is generally equipped with a magnetic strip, and the OIS coil is also installed. The OIS coil works with the magnetic strip to drive the frame to move.

[0004] The frame has mounting slots for installing magnet strips. After the magnet strips are installed in the mounting slots, they need to be fixed with glue. However, during the glue application process, excess glue overflows from the mounting slots, affecting the shape and movement of the frame. Therefore, this needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a lens driving mechanism and its frame to solve the problems of the prior art.

[0006] To address the aforementioned technical problems, the embodiments of this utility model provide a framework, which includes:

[0007] A frame body, wherein the frame body is provided with a mounting groove, one side wall of the mounting groove is an inclined surface and the inner wall of the mounting groove is provided with a receiving groove, the receiving groove being adjacent to the inclined surface;

[0008] A magnetic strip, wherein the magnetic strip is located in the mounting groove and has a clearance notch, the clearance notch being matched with the inclined surface.

[0009] In one embodiment, the frame is a rectangular ring with mounting grooves on all four sides;

[0010] The mounting grooves are formed by the top surface or a recess in the top surface of the frame.

[0011] In one embodiment, the inclined surface is the inner wall of one side of the mounting groove along its length.

[0012] In one embodiment, the two sidewalls of each mounting groove along its length are respectively the inclined surfaces;

[0013] The bottom wall of each of the mounting slots is provided with two receiving slots, and the two receiving slots are respectively adjacent to the two mounting slots.

[0014] In one embodiment, the frame further includes a built-in metal frame located within the frame and comprising a metal sheet abutting against the sidewall of the mounting slot along its length.

[0015] In one embodiment, the metal sheet is located outside the receiving groove.

[0016] In one embodiment, the frame is a rectangular ring with mounting grooves on all four sides;

[0017] The built-in metal frame includes four metal plates and connecting plates, with the four metal plates respectively abutting the sidewalls of the four mounting slots along the length direction;

[0018] The connecting piece is connected to the four metal pieces.

[0019] In one embodiment, the mounting grooves are formed by recesses in the bottom surface of the frame;

[0020] The connecting piece is located on the top surface of the four metal pieces.

[0021] In one embodiment, the frame further includes a support protrusion connected to the bottom surface of the frame.

[0022] This utility model also relates to a lens driving mechanism, which has the above-described frame. Attached Figure Description

[0023] Figure 1 This is an exploded view of a lens driving mechanism according to an embodiment of the present invention.

[0024] Figure 2 and Figure 3 They are Figure 1 An exploded view of the lens drive mechanism in the illustrated embodiment.

[0025] Figure 4 yes Figure 2 The assembly diagram of the frame, carrier, and lower spring in the illustrated embodiment.

[0026] Figure 5 yes Figure 2 An exploded view of the frame in the illustrated embodiment.

[0027] Figure 6 and Figure 7 yes Figure 2 A perspective view of the base in the illustrated embodiment.

[0028] Figure 8 yes Figure 7 Exploded view of the base in the illustrated embodiment.

[0029] Figure 9This is a perspective view of the built-in circuitry of an embodiment of the present invention.

[0030] Figure 10 Figure 9 A perspective view of the built-in circuitry lower layer structure of the embodiment shown.

[0031] Reference numerals: 100, Lens drive mechanism; 1, Base; 11, Base plate; 12, Support column; 13, Support block; 14, Built-in circuit; 141, Upper structure; 142, Lower structure; 143, Adsorption iron sheet; 15, OIS coil; 16, Winding block; 17, Groove; 18, Step; 19, Sensor; 2, Frame; 21, Frame body; 211, Mounting groove; 212, Inclined surface; 213, Receiving groove; 214, Clearance groove; 22, Built-in metal frame; 221, Metal sheet; 222, Connecting piece; 23, Magnet strip; 231, Clearance notch; 24, Support protrusion; 3, Carrier; 4, Upper spring; 5, Lower spring; 6, Outer shell. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention 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 invention 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.

[0033] 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 be interpreted as “including, but not limited to”.

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0035] 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.

[0036] 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.

[0037] In the following description, in order to clearly demonstrate the structure and working method of the present invention, 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.

[0038] This invention relates to a lens driving mechanism 100, such as... Figure 1-3 As shown, the lens drive mechanism 100 includes a base 1, a frame 2, a carrier 3, an upper spring 4, a lower spring 5, and a housing 6.

[0039] The base 1 includes a base plate 11, multiple support columns 12, built-in wiring 14, and at least three support blocks 13.

[0040] The base plate 11 is rectangular and has four sides. Each side of the base plate 11 has at least two winding blocks on its top surface. The two winding blocks are spaced apart and used to wind the OIS coil 15.

[0041] The top surface of the base plate 11 is also provided with four steps 18, which are located at the four corners of the base plate 11. Four support blocks 13 are connected to the four steps 18. The support blocks 13 are made of wear-resistant material and are used to support the frame 2. Specifically, the top surface of each of the four steps 18 is provided with a groove 17. The bottom of the four support blocks 13 is located in the groove 17 of the four steps 18, and the top of the blocks protrudes from the top surface of the steps 18.

[0042] The height of the four steps 18 is not lower than the height of the winding block. After the OIS coil 15 is wound around the winding block, its height is lower than the height of the four steps 18, so it will not affect the movement of the frame 2.

[0043] In existing technologies, ball bearings are used to support the rolling of the frame 2. However, the balls are very small, resulting in a low yield rate and high mass production costs. This invention uses a support block 13 instead of ball bearings, which facilitates processing.

[0044] In one embodiment, the support block 13 is a circular sheet with its bottom end embedded in the groove 17 of the step 18 and its top end protruding from the top surface of the step 18. The top surface of the sheet is smooth, and the diameter of the sheet is much larger than the diameter of the ball, which facilitates processing and assembly.

[0045] In addition, the support block 13 is preferably made of ceramic or metal, as ceramic or metal is more wear-resistant and has a lower cost.

[0046] Four support columns 12 are connected to the four corners of the base plate 11 and extend upwards. The four support columns 12 are located on the radially outer side of the four steps 18, which can limit the range of motion of the frame 2.

[0047] The built-in circuit 14 is located within the base plate 11, with a portion of its connecting section extending to the top surface of the support column 12 for electrical connection with the upper spring 4. Furthermore, the built-in circuit 14 is also electrically connected to the OIS coil 15, allowing it to be energized when powered on.

[0048] The built-in coil has a double-layer structure. One end of the upper structure 141 is connected to the external circuit, and the other end supplies power to the OIS coil 15 and the upper spring 4. The lower structure 142 consists of four pairs of adsorption patches, which are respectively located at the four corners of the base 1 and below the upper structure 141. As adsorption iron plates 143, they generate an adsorption force with the magnetic strip 23 of the frame 2, making the structure between the frame 2 and the base 1 more compact and stable. At the same time, the frame 2 can be pressed against the support block 13 under the action of the adsorption force, ensuring that the support block 13 has a good support effect.

[0049] The bottom surface of the base plate 11 is also provided with a recessed sensor mounting groove 211, which is used to install multiple sensors 19 at the position of the sensing frame 2. The sensors 19 are also electrically connected to the built-in circuit 14.

[0050] The frame 2 includes a frame 21, an internal metal frame 22, multiple magnetic strips 23, and at least three support protrusions 24.

[0051] The frame 21 is rectangular and can be movably installed on the top surface of the base plate 11. Four support protrusions 24 are connected to the bottom surface of the frame 21 and located at the four corners of the frame 2. The four support protrusions 24 abut against the four support blocks 13 respectively.

[0052] When frame 2 moves, the four support protrusions 24 slide along the four support blocks 13.

[0053] Optionally, the support protrusion 24 can be made of a gel material, such as rubber, silicone or plastic, or of course ceramic or metal.

[0054] Optionally, of the opposing support blocks 13 and support protrusions 24, one is made of a harder material, such as ceramic or metal, and the other is made of a softer material, such as silicone or rubber.

[0055] Of course, the support blocks 13 and support protrusions 24, which are arranged opposite to each other, can both be made of ceramic or metal, but they cannot be made of flexible silicone or rubber at the same time.

[0056] The support protrusion 24 can be cylindrical or sheet-like, and its top end is embedded in the frame 21, or it can be bonded to the bottom surface of the frame 21.

[0057] The bottom surface of the frame 21 is provided with four mounting slots 211, which are located on the four sides of the frame 21 respectively, for mounting four magnetic strips 23.

[0058] The four corners of the frame 2 are provided with multiple recesses 17 and clearance slots 214 on the outside, and the four support columns 12 are respectively located in the four clearance slots 214.

[0059] Each mounting groove 211 has two inclined surfaces 212 on its two sides along the length direction. The inclined surfaces 212 cause the dimensions of the mounting groove 211 to gradually increase from top to bottom along the length direction, that is, the mounting groove 211 is a trapezoidal structure.

[0060] The top wall of the mounting groove 211 is also provided with two receiving grooves 213, which are located at both ends of the top wall of the mounting groove 211 along its length direction and are respectively adjacent to two inclined surfaces 212.

[0061] Four magnetic strips 23 are respectively located in four mounting slots 211. The four magnetic strips 23 cooperate with the aforementioned OIS coil 15 to drive the frame 2 to move in a direction perpendicular to the optical axis. Each of the four magnetic strips 23 has a clearance notch 231 at both ends along its length. The clearance notch 231 is located at the top of both ends of the four magnetic strips 23 and abuts against the inclined surface 212 of the receiving slot 213. That is, the shape of the clearance notch 231 and the inclined surface 212 of the mounting slot 211 are matched and complementary.

[0062] When the magnet strip 23 is installed in the mounting groove 211, it needs to be fixed with glue, but the glue will overflow outside the mounting groove 211. The present invention sets the side wall of the mounting groove 211 as an inclined surface 212, which facilitates the flow of glue from the inclined surface 212 into the mounting groove 211, and the excess glue can also flow into the receiving groove 213 near the inclined surface 212, without overflowing outside the frame 21.

[0063] In some embodiments, the mounting groove 211 may also be formed by a recess in the top surface of the frame 21. One or two sidewalls of the mounting groove 211 along its length direction may be provided as inclined surfaces 212. The dimensions of the mounting groove 211 along its length direction gradually decrease from top to bottom. The bottom wall of the mounting groove 211 is provided with a receiving groove 213 adjacent to the inclined surface 212. The bottom surfaces at both ends of the magnet strip 23 are provided with clearance notches 231 that match the inclined surface 212.

[0064] In addition, the mounting slot 211 is open to the inside of the frame 21 to avoid affecting the AF coil of the magnetic field line passing through the carrier 3.

[0065] An internal metal frame 22 is embedded within the frame 21 for fixing the magnetic strip 23. Specifically, the internal metal frame 22 includes four metal pieces 221 and an annular connecting piece 222. The four metal pieces 221 are located on the four sides of the frame 21 and adjacent to the sidewalls of the mounting groove 211 extending along the length direction, and are located on the outside of the mounting groove 211 for attracting the magnetic strip 23.

[0066] The connecting piece 222 is ring-shaped and integrally formed with the four metal pieces 221. The connecting piece 222 is located on the top surface of the four metal pieces 221 and is used to connect the four metal pieces 221, while also enhancing the strength of the frame 21.

[0067] The carrier 3 is located inside the ring of the frame 2 and is used to mount the lens. Multiple AF coils are provided on the outer side of the carrier 3. The AF coils cooperate with multiple magnet strips 23 to drive the carrier 3 to move along the optical axis.

[0068] The reset component includes an upper spring plate 4 and a lower spring plate 5. The upper spring plate 4 is located on the top surface of the frame 2 and is connected to the frame 2 and the carrier 3. In addition, the upper spring plate 4 is also connected to the support column 12 to support the frame 2 suspended above the base plate 11. Furthermore, the upper spring plate 4 is electrically connected to the connection end located on the top surface of the support column 12 and the AF coil. After the built-in circuit 14 is energized, the current flows from the upper spring plate 4 into the AF coil, energizing the AF coil.

[0069] The lower spring 5 is located on the bottom surface of the frame 2 and is connected to the frame 2 and the carrier 3. The lower spring 5 and the upper spring 4 are elastic and can drive the carrier 3 to reset.

[0070] The outer shell 6 is connected to the base 1 and forms a space to accommodate the frame 2, the carrier 3 and the reset component.

[0071] The base plate 11 of the present invention is provided with a support block 13, which replaces the ball bearings of the prior art. The top of the support block 13 contacts the support protrusion 24 at the bottom of the frame 2, which plays an auxiliary support role for the frame 2. This not only facilitates processing and assembly, but also reduces costs.

[0072] 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.

[0073] 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.

[0074] 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 in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A frame, characterized in that, The frame comprises: a frame body provided with mounting slots, one side wall of the mounting slots being an inclined surface and the inner wall of the mounting slots being provided with accommodating slots adjacent to the inclined surface; a magnet strip located in the mounting slots and provided with an avoiding notch matched with the inclined surface.

2. The frame of claim 1, wherein, The frame body is rectangular ring-shaped and four sides thereof are respectively provided with the mounting slots. The mounting slots are formed by the top surface or the top surface recess of the frame body.

3. Frame according to claim 1 or 2, characterized in that The inclined surface is one side inner wall of the mounting slots along the length direction.

4. Frame according to claim 1 or 2, characterized in that Two side walls of each mounting slot along the length direction are respectively the inclined surface. The bottom wall of each mounting slot is respectively provided with two accommodating slots adjacent to two mounting slots.

5. The frame of claim 1, wherein, The frame further comprises an embedded metal frame located in the frame body and comprising a metal sheet adjacent to the side wall of the mounting slots along the length direction.

6. The frame of claim 5, wherein, The metal sheet is located outside the accommodating slots.

7. The frame of claim 5, wherein, The frame body is rectangular ring-shaped and four sides thereof are respectively provided with the mounting slots. The embedded metal frame comprises four metal sheets adjacent to the side wall of four mounting slots along the length direction and a connecting sheet. The connecting sheet is connected with the four metal sheets.

8. The frame of claim 7, wherein, The mounting slots are formed by the bottom surface recess of the frame body. The connecting sheet is located on the top surface of the four metal sheets.

9. The frame of claim 1, wherein, The frame further comprises a supporting protrusion connected with the bottom surface of the frame.

10. A lens driving mechanism characterized by comprising: The lens driving mechanism comprises the frame according to any one of claims 1-9.

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