Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, the lens driving mechanism comprises a base, a frame, a carrier and a reset piece, the base comprises a bottom plate and at least three supporting blocks, and the supporting blocks are connected to the top surface of the bottom plate at intervals. The frame comprises a frame body and at least three supporting protrusions, the frame body is located on the top face of the bottom plate, and the supporting protrusions are connected to the bottom face of the frame body and provided with the at least three supporting blocks. The carrier is movably connected with the frame and is used for installing a lens. The reset piece is connected with the carrier and the frame and used for driving the carrier.

Description

TECHNICAL FIELD

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

[0002] The lens drive mechanism generally includes a base, a frame and a carrier for mounting a lens, the frame and the base are connected through ball rolling, and the carrier is movably connected with the frame.

[0003] However, the ball size is relatively small, the processing is difficult, the defective rate is high, the price is expensive, and the ball size is small, which also causes assembly difficulty. It is necessary to find a replacement technical solution to reduce the processing cost and reduce the assembly difficulty. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a lens drive mechanism to solve the prior art problems.

[0005] To solve the above technical problems, the embodiment of the utility model provides a lens drive mechanism, which comprises:

[0006] A base, the base comprises a bottom plate and at least three supporting blocks, the supporting blocks are connected to the top surface of the bottom plate at intervals;

[0007] A frame, the frame comprises a frame body and at least three supporting protrusions, the frame body is located on the top surface of the bottom plate, and the supporting protrusions are connected to the bottom surface of the frame body and abut against at least three supporting blocks respectively;

[0008] A carrier, the carrier is movably connected with the frame and is used for mounting a lens; and

[0009] A reset member, the reset member is connected with the carrier and the frame and is used for driving the carrier.

[0010] In one embodiment, the supporting block is in the form of a sheet.

[0011] In one embodiment, the top surface of the supporting block is smooth.

[0012] In one embodiment, at least one of the supporting block and the supporting protrusion is made of ceramic or metal material.

[0013] In one embodiment, one of the supporting block and the supporting protrusion is made of ceramic or metal material, and the other is a colloid.

[0014] In one embodiment, the colloid is rubber, silicone or plastic.

[0015] In one embodiment, the top surface of the bottom plate is provided with a plurality of grooves for accommodating a plurality of supporting blocks.

[0016] In one embodiment, the bottom surface of the frame body is further provided with a mounting groove, one side wall of the mounting groove is an inclined surface, and an inner wall of the mounting groove is provided with a receiving groove adjacent to the inclined surface.

[0017] The frame further comprises a magnet strip located in the mounting groove and provided with an avoiding notch matched with the inclined surface.

[0018] The base further comprises an OIS coil connected to the top surface of the bottom plate, and the OIS coil cooperates with the magnet strip to drive the frame to move in a direction perpendicular to the optical axis.

[0019] In one embodiment, the base further comprises a plurality of winding blocks connected to the top surface of the bottom plate, and the OIS coil is wound outside at least two winding blocks.

[0020] In one embodiment, the frame further comprises an embedded metal frame located in the frame body and comprising a metal sheet adjacent to the length direction side wall of the mounting groove.

[0021] In one embodiment, the mounting groove is open towards the inner side of the frame body.

[0022] The carrier is externally provided with an AF coil, and the AF coil cooperates with the magnet strip to drive the carrier to move in the direction of the optical axis.

[0023] In one embodiment, the base further comprises:

[0024] a plurality of support columns connected to the top surface of the bottom plate; and

[0025] an embedded circuit embedded in the bottom plate and at least partially extending to the top surface of the support column;

[0026] The reset member comprises an upper spring sheet and a lower spring sheet, the upper spring sheet is located on the top surface of the frame and connected with the frame and the carrier, and the lower spring sheet is located on the bottom surface of the frame and connected with the frame and the carrier.

[0027] The upper spring sheet is electrically connected with the part of the embedded coil extending to the top surface of the support column.

[0028] The AF coil is electrically connected with the upper spring sheet.

[0029] In one embodiment, the frame is provided with a plurality of avoiding grooves.

[0030] The support column is located in the avoiding groove.

[0031] In one embodiment, the top surface of the bottom plate is provided with a plurality of steps, and the support blocks are connected with the steps.

[0032] In one embodiment, the built-in circuit includes an upper structure and a lower structure which are vertically spaced and stacked, and the upper structure is electrically connected with the upper spring sheet.

[0033] The lower structure is located at four corner portions of the bottom plate.

[0034] The bottom plate of the utility model sets up support block, utilizes support block to replace prior art's ball, and support block top end and frame bottom end's support protrusion are contacted, and the frame plays auxiliary support effect, not only convenient processing assembly, can also reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the explosion drawing of the lens driving mechanism of one embodiment of the utility model.

[0036] Figure 2 And Figure 3 Respectively Figure 1 It is the explosion drawing of the lens driving mechanism in the embodiment shown.

[0037] Figure 4 It is Figure 2 The assembly drawing of the frame, carrier and lower spring sheet in the embodiment shown.

[0038] Figure 5 It is Figure 2 The explosion drawing of the frame in the embodiment shown.

[0039] Figure 6 And Figure 7 It is Figure 2 The perspective view of the base in the embodiment shown.

[0040] Figure 8 It is Figure 7 The explosion drawing of the base in the embodiment shown.

[0041] Figure 9 It is the perspective view of the built-in circuit of one embodiment of the utility model.

[0042] Figure 10 Figure 9 The perspective view of the lower structure of the built-in circuit of the embodiment shown.

[0043] Reference signs: 100, lens driving mechanism; 1, base; 11, bottom 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 house; 17, groove; 18, step; 19, sensor; 2, frame; 21, frame body; 211, mounting groove; 212, inclined surface; 213, containing groove; 214, avoiding groove; 22, built-in metal frame; 221, metal sheet; 222, connecting sheet; 23, magnet bar; 231, avoiding notch; 24, support protrusion; 3, carrier; 4, upper spring sheet; 5, lower spring sheet; 6, shell. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the claims of the present application can be realized.

[0045] Unless otherwise required by context, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

[0046] The embodiments of the present application will be described in detail below with reference to the drawings, so as to make the purpose, characteristics and advantages of the present application more clear. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but only to illustrate the essential spirit of the technical scheme of the present application.

[0047] The reference to "one embodiment" or "an embodiment" in the entire description means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the occurrence of "in one embodiment" or "in an embodiment" at various places in the entire description does not necessarily refer to the same embodiment. In addition, a particular feature, structure or characteristic can be combined in any way in one or more embodiments.

[0048] As used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the content clearly dictates otherwise.

[0049] In the following description, in order to clearly show the structure and working mode of the utility model, many directional words will be used for description, but "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient language, and should not be understood as limiting language.

[0050] The utility model relates to a kind of lens driving mechanism 100, as shown in Figures 1-3 The lens driving mechanism 100 includes base 1, frame 2, carrier 3, upper spring piece 4, lower spring piece 5 and shell 6.

[0051] The base 1 includes bottom plate 11, multiple support columns 12, built-in circuit 14 and at least three support blocks 13.

[0052] The bottom plate 11 is rectangular plate and has four sides, and each side of the bottom plate 11 is provided with at least two winding blocks on the top surface, and the two winding blocks are arranged at intervals for winding the OIS coil 15.

[0053] The top surface of the bottom plate 11 is further provided with four steps 18, and the four steps 18 are located at the four corners of the bottom plate 11. The four support blocks 13 are connected to the four steps 18, and the support blocks 13 are made of wear-resistant material for supporting the frame 2. Specifically, the top surface of the four steps 18 is provided with a groove 17, and the bottom of the four support blocks 13 is located in the groove 17 of the four steps 18, and the top end protrudes from the top surface of the step 18.

[0054] The height of the four steps 18 is not less than the height of the winding block, and after the OIS coil 15 is wound on the winding block, the height is lower than the height of the four steps 18, which does not affect the movement of the frame 2.

[0055] In the prior art, the frame 2 is supported by rolling balls, but the rolling balls are very small in size, and the yield of good products is too low, and the cost of mass production is very high. The support blocks 13 of the utility model are used instead of rolling balls, which is convenient for processing.

[0056] In one embodiment, the support block 13 is a circular thin sheet and the bottom end is embedded in the groove 17 of the step 18, and the top end protrudes from the top surface of the step 18. The top surface of the thin sheet is a smooth surface, and the diameter of the thin sheet is much larger than that of the rolling ball, which is convenient for processing and assembly.

[0057] In addition, the support block 13 is preferably made of ceramic or metal material, which is more wear-resistant and low in cost.

[0058] The four support columns 12 are connected to the four corners of the bottom plate 11 and extend upward, and the four support columns 12 are located radially outside the four steps 18, which can limit the movement range of the frame 2.

[0059] The built-in circuit 14 is located in the bottom plate 11 and a part of the connecting segment extends to the top surface of the support column 12 for electrical connection with the upper spring 4. In addition, the built-in circuit 14 is also electrically connected with the OIS coil 15, and after being powered on, the OIS coil 15 can be powered.

[0060] The built-in coil is a double-layer structure, wherein one end of the upper layer structure 141 is connected with external circuit, and the other end is used for power supply of the OIS coil 15 and the upper spring 4; the lower layer structure 142 is four pairs of adsorbing patches which are separately arranged at the four corner positions of the base 1 and below the upper layer structure 141. The adsorbing patches serve as adsorbing iron sheets 143 and generate adsorbing force with the magnet strips 23 of the frame 2, so that the structure between the frame 2 and the base 1 is more compact and stable, and at the same time, the frame 2 can be abutted on the support block 13 under the action of the adsorbing force, so as to ensure that the support block 13 has good supporting effect.

[0061] The bottom surface of the bottom plate 11 is also provided with a recessed sensor mounting groove 211 for mounting a plurality of sensors 19 for sensing the position of the frame 2, and the sensors 19 are also electrically connected with the built-in circuit 14.

[0062] The frame 2 includes a frame body 21, a built-in metal frame 22, a plurality of magnet strips 23 and at least three support protrusions 24.

[0063] The frame body 21 is a rectangular frame and is movably mounted on the top surface of the bottom plate 11. The four support protrusions 24 are connected to the bottom surface of the frame body 21 and are located at the four corner portions of the frame 2, and the four support protrusions 24 are respectively abutted against the four support blocks 13.

[0064] When the frame 2 moves, the four support protrusions 24 slide along the four support blocks 13.

[0065] Optionally, the support protrusions 24 can be of gel material, such as rubber, silicone or plastic, and can also be of ceramic or metal material.

[0066] Optionally, one of the support block 13 and the support protrusion 24 which are opposite to each other is of relatively hard material, such as ceramic or metal, and the other is of relatively soft material, such as silicone or rubber.

[0067] Of course, the support block 13 and the support protrusion 24 which are opposite to each other can both be of ceramic or metal, but cannot be of flexible silicone or rubber at the same time.

[0068] The support protrusion 24 can be a cylindrical body or a sheet and is embedded in the top end of the frame body 21 or is bonded to the bottom surface of the frame body 21.

[0069] The bottom surface of the frame 21 is provided with four installation grooves 211, which are respectively located at the four sides of the frame 21 and used for installing the four magnet strips 23.

[0070] The outer side of the four corners of the frame 2 is provided with a plurality of avoiding grooves 214 of the grooves 17, and the four supporting columns 12 are respectively located in the four avoiding grooves 214.

[0071] The two side walls of each installation groove 211 along the length direction are respectively inclined surfaces 212, which gradually increase the size of the installation groove 211 along the length direction from top to bottom, that is, the installation groove 211 has a trapezoidal structure.

[0072] The top wall of the installation groove 211 is also provided with two containing grooves 213, which are located at the two ends of the top wall of the installation groove 211 along the length direction and respectively abut against the two inclined surfaces 212.

[0073] The four magnet strips 23 are respectively located in the four installation grooves 211, and the four magnet strips 23 cooperate with the OIS coil 15 to drive the frame 2 to move in the direction perpendicular to the optical axis. The two ends of the four magnet strips 23 along the length direction are provided with avoiding notches 231, which are located at the top of the two ends of the four magnet strips 23. The avoiding notches 231 abut against the inclined surfaces 212 of the containing grooves 213, that is, the shape of the avoiding notches 231 and the inclined surfaces 212 of the installation groove 211 are matched and complementary.

[0074] When the magnet strip 23 is installed in the installation groove 211, it is necessary to fix the magnet strip 23 with glue, but the glue will overflow outside the installation groove 211. The side wall of the installation groove 211 is set as the inclined surface 212 in the utility model, which facilitates the glue to flow into the installation groove 211 from the inclined surface 212, and the excess glue can also flow into the containing groove 213 near the inclined surface 212, without overflowing outside the frame 21.

[0075] In some embodiments, the installation groove 211 can also be recessed from the top surface of the frame 21, one or two side walls of the installation groove 211 along the length direction can be set as the inclined surface 212, the size of the installation groove 211 along the length direction gradually decreases from top to bottom, and the bottom wall of the installation groove 211 is provided with the containing groove 213 adjacent to the inclined surface 212. The bottom surface of the two ends of the magnet strip 23 is provided with the avoiding notch 231 matched with the inclined surface 212.

[0076] In addition, the installation groove 211 is open towards the inner side of the frame 21, which avoids affecting the magnetic field lines passing through the AF coil of the carrier 3.

[0077] The built-in metal frame 22 is embedded in the frame body 21 and is used for fixing the magnet strip 23.

[0078] The connecting piece 222 is annular and is integrally formed with the four metal pieces 221, and is located on the top surface of the four metal pieces 221 and is used for connecting the four metal pieces 221 and enhancing the strength of the frame body 21.

[0079] The carrier 3 is located in the ring of the frame 2 and is used for mounting a lens.

[0080] The reset member comprises an upper spring piece 4 and a lower spring piece 5.

[0081] The lower spring piece 5 is located on the bottom surface of the frame 2 and is connected with the frame 2 and the carrier 3, and the upper spring piece 4 and the lower spring piece 5 are elastic and can drive the carrier 3 to reset.

[0082] The shell 6 is connected with the base 1 and forms a space for accommodating the frame 2, the carrier 3 and the reset member.

[0083] The bottom plate 11 of the utility model is provided with the support block 13, the support block 13 replaces the ball of the prior art, the top end of the support block 13 is in contact with the support protrusion 24 at the bottom end of the frame 2, and the frame 2 is assisted and supported, which is convenient for machining and assembling and can reduce the cost.

[0084] The preferred embodiments of the utility model have been described in detail above, but 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.

[0085] In view of the above detailed description, these and other changes can be made to the embodiments. Generally, the terms 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.

[0086] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the utility model, and in actual application, various changes can be made to them in form and details without departing from the spirit and scope of the utility model.

Claims

1. A lens driving mechanism characterized by comprising: The lens driving mechanism comprises: a base comprising a bottom plate and at least three supporting blocks spacedly connected to the top surface of the bottom plate; a frame comprising a frame body located on the top surface of the bottom plate and at least three supporting protrusions connected to the bottom surface of the frame body and respectively abutting against the at least three supporting blocks; a carrier movably connected with the frame for mounting a lens; and a reset member connected with the carrier and the frame for driving the carrier.

2. The lens driving mechanism according to claim 1, wherein The supporting blocks are in the shape of a sheet.

3. The lens driving mechanism according to claim 1, wherein The top surface of the supporting blocks is smooth.

4. The lens driving mechanism according to claim 1, wherein At least one of the supporting blocks and the supporting protrusions is made of ceramic or metal.

5. The lens driving mechanism according to claim 1, wherein One of the supporting blocks and the supporting protrusions is made of ceramic or metal, and the other is made of glue.

6. The lens driving mechanism according to claim 5, wherein The glue is rubber, silica gel or plastic.

7. The lens driving mechanism according to claim 1, wherein The top surface of the bottom plate is provided with a plurality of grooves for accommodating the supporting blocks.

8. The lens driving mechanism according to claim 1, wherein The bottom surface of the frame body is further 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 an accommodating groove adjacent to the inclined surface. The frame further comprises a magnet strip located in the mounting groove and provided with an avoiding notch matching the inclined surface. The base further comprises an OIS coil connected with the top surface of the bottom plate, and the OIS coil cooperates with the magnet strip to drive the frame to move in a direction perpendicular to the optical axis.

9. The lens driving mechanism according to claim 8, wherein The base further comprises a plurality of winding blocks connected to the top surface of the bottom plate, and the OIS coil is wound around at least two of the winding blocks.

10. The lens driving mechanism according to claim 8, 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 groove in the length direction.

11. The lens driving mechanism according to claim 8, wherein The mounting groove is open towards the inside of the frame body. The carrier is externally provided with an AF coil, and the AF coil cooperates with the magnet strip to drive the carrier to move in the direction of the optical axis.

12. The lens driving mechanism according to claim 11, wherein The base further comprises: a plurality of supporting columns connected to the top surface of the bottom plate; and an embedded circuit embedded in the bottom plate and at least partially extending to the top surface of the supporting columns. The reset member comprises an upper spring sheet located on the top surface of the frame and connected with the frame and the carrier, and a lower spring sheet located on the bottom surface of the frame and connected with the frame and the carrier. The upper spring sheet is electrically connected with the portion of the embedded circuit extending to the top surface of the supporting columns. The AF coil is electrically connected with the upper spring sheet.

13. The lens driving mechanism according to claim 12, wherein The frame is provided with a plurality of avoiding grooves. The supporting columns are located in the avoiding grooves.

14. The lens driving mechanism according to claim 9, wherein The top surface of the bottom plate is provided with a plurality of steps, and the supporting blocks are connected with the steps.

15. The lens driving mechanism according to claim 12, wherein The embedded circuit comprises an upper structure and a lower structure spacedly stacked in an up-down direction, and the upper structure is electrically connected with the upper spring sheet. The lower structure is located at the four corners of the bottom plate.

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