Optical element driving mechanism

Abstract

The utility model discloses an optical element driving mechanism, including shell, base, a plurality of magnet block and carrier, the shell includes top cap and frame, the top cap has the light -proof hole. The top surface of frame is connected with top cap and includes a plurality of side plates, and a plurality of side plates surround the light -proof hole arrangement. The base is connected with the bottom surface of frame and is formed with the cavity with shell cooperation. A plurality of magnet blocks are arranged around the light -proof hole and are connected with a plurality of side plates. The carrier is located in the cavity and is elastically connected with the shell and the base, and the radial outside of the carrier is provided with coil group, and the coil group is matched with a plurality of magnet blocks and can drive the carrier to move along the vertical direction.

Description

Technical Field

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

[0002] With the development of technology, many electronic devices today (such as smartphones or digital cameras) have the function of taking pictures or recording videos. The use of these electronic devices is becoming more and more common, and they are developing towards convenient and thinner designs to provide users with more choices.

[0003] Some electronic devices with photographic or video recording capabilities include a lens drive mechanism to move optical components such as a lens, thereby achieving autofocus and optical image stabilization. Light can pass through the aforementioned optical components to form an image on the photosensitive element.

[0004] With the development of technology, electronic devices have also placed higher demands on lenses. For example, lenses have a longer focal length, but the space inside the lens driving element is limited. The problem of how to simplify the internal structure of the lens driving element and improve the driving force of the carrier needs to be solved urgently. Utility Model Content

[0005] The purpose of this invention is to provide an optical element driving mechanism to solve the problems of the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides an optical element driving mechanism, comprising:

[0007] Housing, the housing comprising:

[0008] Top cover, the top cover having light-blocking holes;

[0009] A frame, the top surface of which is connected to the top cover and includes multiple side plates, the multiple side plates being arranged around the light-blocking hole;

[0010] A base, which is connected to the bottom surface of the frame and mates with the outer shell to form a cavity;

[0011] Multiple magnet blocks are arranged around the light-blocking hole and connected to the multiple side plates;

[0012] The carrier is located inside the cavity and is elastically connected to the outer shell and the base. A coil group is wound around the radial outer side of the carrier. The coil group cooperates with a plurality of magnet blocks to drive the carrier to move in the vertical direction.

[0013] In one embodiment, the four side panels are arranged around the light-blocking hole and form the frame, the frame having four corners;

[0014] The plurality of magnet blocks include a plurality of second magnet blocks and a plurality of first magnet blocks, the plurality of second magnet blocks being connected to the inner walls of the four side plates, and the plurality of first magnet blocks being fitted to the four corners of the frame.

[0015] In one embodiment, the center of the second magnet block along the vertical direction and the center of the first magnet block along the vertical direction are on the same horizontal plane.

[0016] In one embodiment, the bottom surface of the top cover is provided with four first support platforms, which are located at the four corners of the frame.

[0017] The height of the first magnet block is less than the height of the second magnet block, and its top end abuts against the bottom surface of the first support platform.

[0018] In one embodiment, the top surface of the second magnet block abuts against the top cover.

[0019] In one embodiment, the bottom surface of the top cover is provided with at least four second support platforms, the four second support platforms abutting against the inner walls of the four side panels and having a height less than the height of the first support platform;

[0020] The top surfaces of the four second magnet blocks respectively abut against the bottom surfaces of at least four second support platforms.

[0021] In one embodiment, the top surface of the second magnet block abuts against the bottom surface of the four first support platforms.

[0022] In one embodiment, the top surfaces of the four corners of the top cover are recessed to form the second support platform.

[0023] In one embodiment, the four sides of the top cover are recessed to form the first support platform.

[0024] In one embodiment, the optical element driving mechanism further includes:

[0025] An upper spring, located at the top of the carrier and elastically connected to the outer shell and the carrier; and

[0026] A lower spring is located at the bottom of the carrier and is connected to the base and the carrier. Attached Figure Description

[0027] Figure 1 and Figure 2 This is an exploded view of the optical element driving mechanism of one embodiment of the present invention.

[0028] Figure 3 yes Figure 1 An assembly diagram of the outer shell, upper spring plate, and multiple magnet blocks in the illustrated embodiment.

[0029] Figure 4 yes Figure 1 A perspective view of the outer casing in the illustrated embodiment.

[0030] Figure 5 , Figure 6 and Figure 7 This is an exploded view of the optical element driving mechanism of the second embodiment of this utility model.

[0031] Figure 8 yes Figure 5 The illustrated embodiment shows an assembly diagram of the outer casing, upper spring plate, and multiple magnet blocks.

[0032] Figure 9 yes Figure 5 A perspective view of the outer casing in the illustrated embodiment.

[0033] Figure 10 and Figure 11 This is an exploded view of the optical element driving mechanism of the third embodiment of this utility model.

[0034] Figure 12 yes Figure 10 An assembly diagram of the outer shell, upper spring plate, and multiple magnet blocks in the illustrated embodiment.

[0035] Figure 13 yes Figure 10 A perspective view of the outer casing in the illustrated embodiment.

[0036] Reference numerals: 100, Optical element driving mechanism; 1, Housing; 11, Top cover; 12, Side plate; 13, First support platform; 14, Second support platform; 15, Light-shielding hole; 2, Base; 3, Carrier; 31, Coil group; 4, Upper spring; 41, Outer ring; 42, Inner ring; 43, Spring wire; 44, Connecting piece; 5, Lower spring; 6, First magnet; 7, Second magnet; Detailed Implementation

[0037] 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.

[0038] 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”.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] This utility model relates to an optical element driving mechanism 100, including a housing 1, a base 2, a carrier 3, an upper spring 4, and a lower spring 5. The housing 1 and the base 2 are connected and form a cavity for mounting the carrier 3, the upper spring 4, and the lower spring 5. The carrier 3 is used to mount the lens. A coil group 31 is wound radially around the outer side of the carrier 3, and multiple magnets are installed on the inner wall of the housing 1. The multiple magnets cooperate with the coil group 31 to drive the carrier 3 to move the lens along the optical axis to adjust the focal length. The optical axis of the lens is also known as the optical direction of the lens. Figure 1 The vertical direction in the illustrated embodiment.

[0044] Multiple magnets are roughly aligned vertically and arranged around coil group 31. For some electronic devices with large focusing capabilities, a large driving force is required to drive the carrier 3 to move along the optical axis. This invention installs multiple magnets on the outer shell 1. These magnets can fit against the side wall of the outer shell 1 and are arranged around the side wall of the outer shell 1. Increasing the area and number of magnets can increase the driving force and expand the focusing range of the lens.

[0045] exist Figure 1-4 In the embodiment shown, the housing 1 includes a top cover 11 and a frame. The top cover 11 is rectangular and has a light-shielding hole 15 in the center, through which light can enter the lens.

[0046] The four corners of the top cover 11 form grooves facing the bottom grooves, and the bottom wall of the grooves forms a first support platform 13 at the bottom of the top cover 11. The four first support platforms 13 are basically the same height.

[0047] The frame is a rectangular ring and its top surface is connected to the four sides of the top cover 11. The frame includes four side plates 12, which are connected end to end around the light-blocking hole 15 to form a rectangular ring.

[0048] The base 2 is a rectangular plate, and the base 2 is connected to the bottom surface of the frame.

[0049] Of the eight magnet blocks, four are attached to the four corners of the frame and are designated as first magnet blocks 6. The other four are attached to the four side panels 12 of the frame and are designated as second magnet blocks 7. The four first magnet blocks 6 and the four second magnet blocks 7 are arranged alternately and their ends abut against each other.

[0050] The vertical dimension of the first magnet 6 is smaller than the vertical dimension of the four second magnets 7, meaning the thickness of the first magnet 6 is less than the thickness of the second magnets 7. The four first magnets 6 fill the gaps at the four corners of the outer shell 1 and can also cooperate with the coil assembly 31 to drive the carrier 3 to move along the optical axis, which not only improves the space utilization of the outer shell 1 but also enhances the driving force of the carrier 3.

[0051] Since the thickness of the four first magnet blocks 6 is relatively small, the aforementioned first support platform 13 is provided on the top cover 11. The four first support platforms 13 abut against the top surfaces of the four first magnet blocks 6, so that the first magnet blocks 6 and the coil group 31 of the carrier 3 are aligned in the horizontal direction.

[0052] Each second magnet 7 is attached to a side plate 12 and extends along the length of the side plate 12. The two ends of each second magnet 7 abut against the bottom surfaces of two adjacent first support platforms 13. The centers of the second magnet 7 and the first magnet 6 are basically aligned with the coil group 31.

[0053] exist Figure 5-9 In the embodiment shown, the top cover 11 has protruding first support platforms 13 at its four corners, and the four sides of the top cover 11 are recessed downward to form downward protruding second support platforms 14. The top surfaces of the four first magnet blocks 6 abut against the four first support platforms 13, and the top surfaces of the four second magnet blocks 7 abut against the second support platforms 14.

[0054] exist Figure 10-13In the embodiment shown, the top cover 11 is also provided with a first support platform 13 at the four corners, but no second support platform 14 is provided. The top surfaces of the four first magnet blocks 6 also abut against the four first support platforms 13, while the top surfaces of the four second magnet blocks 7 abut against the bottom surface of the top cover 11.

[0055] Of course, protruding bosses can also be provided at the four corners of the base 2. These bosses are located on the bottom surface of the four first magnet blocks 6. In other words, the first magnet blocks 6 are sandwiched between the bosses and the first support platform 13, making the first magnet blocks 6 more stable.

[0056] Both the upper spring 4 and the lower spring 5 are elastic and cooperate with each other, and can be used to drive the carrier 3 to reset.

[0057] The upper spring 4 is located at the top of the carrier 3 and is elastically connected to the outer shell 1 and the carrier 3, while the lower spring 5 is located at the bottom of the carrier 3 and is elastically connected to the carrier 3 and the base 2.

[0058] The upper spring plate 4 is plate-shaped and divided into an outer ring 41 and an inner ring 42 in the radial direction. The outer ring 41 is located outside the upper spring plate 4 in the radial direction, while the inner ring 42 is located inside the upper spring plate 4 in the radial direction. The outer ring 41 and the inner ring 42 are connected by a spring wire 43.

[0059] The outer ring 41 of the upper spring plate 4 includes four connecting pieces 44. The four connecting pieces 44 are sheet-shaped and their shapes are similar to or the same as the bottom surface of the first support platform 13. The four connecting pieces 44 are respectively attached to the bottom surfaces of the four first support platforms 13 and are sandwiched between the four first magnet blocks 6 and the first support platform 13, making the connection between them and the outer shell 1 more stable.

[0060] The remaining portion of the outer ring can be located between the second magnet and the top cover, or in an embodiment with a second support platform, the remaining portion of the outer ring is located between the second magnet and the second support platform. The first and second magnets expand and fix the outer ring of the upper spring sheet, ensuring the upper spring sheet remains relatively stable on a horizontal plane, thus preventing the carrier from shifting during shaking.

[0061] Of course. In other embodiments, the outer ring 41 of the upper spring 4 can also be directly connected to the top cover 11 or the side plate 12 of the housing 1.

[0062] The lower spring 5 also includes an outer ring 51 and an inner ring 52, which are connected by a spring wire 53. The outer ring 51 is located on the outside and connected to the base 2, while the inner ring 52 is located on the inside and connected to the bottom of the carrier 3. The outer ring 51 of the lower spring 5 is located between the base 2 and the first magnet block 6.

[0063] The outer ring 51 of the lower spring 5 is also provided with four connecting pieces 54, which are located between the four first magnet blocks 6 and the base 2 respectively.

[0064] Of course, in some embodiments, the base 2 has the aforementioned bosses at its four corners, and the four connecting pieces 44 can be clamped between the bosses and the first magnet block 6. Alternatively, the four sides of the outer ring can be positioned between the second magnet block and the base to tightly fix the outer ring of the lower spring, forming a large radially outward preload, thus making the overall structure of the lower spring relatively stable.

[0065] The connecting piece 44 of the upper spring 4 is located between the first magnet block 6 and the first support platform 13, and the connecting piece 54 of the lower spring 5 is located between the first magnet block 6 and the boss. By setting the first magnet block 6 at the corner of the outer shell 1, and then using the first magnet block 6 to fix the upper spring 4 and the lower spring 5, the structure is simplified, the processing is simple, and the driving force of the carrier 3 can be provided.

[0066] This optical element drive mechanism can also be used in some electronic devices that do not require focusing. Because the upper and lower springs have stable structures and the carrier is relatively stable, the lens can have focusing functionality and can also be applied to some electronic devices with fixed focal lengths. The different thicknesses of the first and second magnet blocks compensate for insufficient thrust and optimize the linearity of the drive process.

[0067] 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.

[0068] 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. An optical element driving mechanism, characterized in that, include: Housing, the housing comprising: Top cover, the top cover having light-blocking holes; A frame, the top surface of which is connected to the top cover and includes multiple side plates, the multiple side plates being arranged around the light-blocking hole; A base, which is connected to the bottom surface of the frame and mates with the outer shell to form a cavity; Multiple magnet blocks are arranged around the light-blocking hole and connected to the multiple side plates; The carrier is located inside the cavity and is elastically connected to the outer shell and the base. A coil group is wound around the radial outer side of the carrier. The coil group cooperates with a plurality of magnet blocks to drive the carrier to move in the vertical direction.

2. The optical element driving mechanism according to claim 1, characterized in that, The four side plates are arranged around the light-blocking hole and form the frame, the frame having four corners; The plurality of magnet blocks include a plurality of second magnet blocks and a plurality of first magnet blocks, the plurality of second magnet blocks being connected to the inner walls of the four side plates, and the plurality of first magnet blocks being fitted to the four corners of the frame.

3. The optical element driving mechanism according to claim 2, characterized in that, The center of the second magnet along the vertical direction and the center of the first magnet along the vertical direction are on the same horizontal plane.

4. The optical element driving mechanism according to claim 2, characterized in that, The bottom surface of the top cover is provided with four first support platforms, which are located at the four corners of the frame. The height of the first magnet block is less than the height of the second magnet block, and its top end abuts against the bottom surface of the first support platform.

5. The optical element driving mechanism according to claim 4, characterized in that, The top surface of the second magnet block abuts against the top cover.

6. The optical element driving mechanism according to claim 4, characterized in that, The bottom surface of the top cover is provided with at least four second support platforms, and the four second support platforms abut against the inner walls of the four side panels and are less than the height of the first support platform. The top surfaces of the four second magnet blocks respectively abut against the bottom surfaces of at least four second support platforms.

7. The optical element driving mechanism according to claim 4, characterized in that, The top surface of the second magnet block abuts against the bottom surface of the four first support platforms.

8. The optical element driving mechanism according to claim 6, characterized in that, The top surface of the four corners of the top cover is recessed to form the second support platform.

9. The optical element driving mechanism according to claim 6, characterized in that, The four sides of the top cover are recessed to form the first support platform.

10. The optical element driving mechanism according to claim 1, characterized in that, The optical element driving mechanism further includes: An upper spring, located at the top of the carrier and elastically connected to the outer shell and the carrier; and A lower spring is located at the bottom of the carrier and is connected to the base and the carrier.

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