CN107561827B - Autofocus devices and electronic equipment - Google Patents
Autofocus devices and electronic equipment Download PDFInfo
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- CN107561827B CN107561827B CN201711033893.XA CN201711033893A CN107561827B CN 107561827 B CN107561827 B CN 107561827B CN 201711033893 A CN201711033893 A CN 201711033893A CN 107561827 B CN107561827 B CN 107561827B
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Abstract
本公开是提供一种自动对焦装置及电子设备，其中自动对焦装置包括壳体，设于所述壳体内的对焦线圈、用于装载镜片的载体，以及用以导向所述载体移动方向的导向结构。所述载体包括对焦磁铁，所述对焦磁铁能够与所述对焦线圈配合用以驱动所述载体移动，所述载体还包括配合部，所述配合部与所述导向结构配合，用以使得所述载体沿所述导向结构的上下方向移动。本公开通过导向结构与载体上的配合部配合以导向载体移动，该导向结构与配合部的装配工艺简单，且占用工位少，可提高产品的生产效率，简化了自动对焦装置的结构。
The present disclosure provides an automatic focusing device and electronic equipment, wherein the automatic focusing device includes a casing, a focusing coil arranged in the casing, a carrier for loading lenses, and a guide structure for guiding the moving direction of the carrier . The carrier includes a focusing magnet, and the focusing magnet can cooperate with the focusing coil to drive the carrier to move. The carrier moves in the up-down direction of the guide structure. The present disclosure guides the carrier to move by cooperating with the matching portion on the carrier, the guide structure and the matching portion have a simple assembly process, occupy less workstations, can improve the production efficiency of the product, and simplify the structure of the auto-focusing device.
Description
Technical Field
The present disclosure relates to camera lens technologies, and in particular, to an automatic focusing apparatus and an electronic device.
Background
With the wide application of smart phones, auto-focusing devices in photographing modules in electronic devices are becoming more mature, and users have higher and higher requirements for photographing experience.
The traditional automatic focusing device adopts an upper metal elastic sheet and a lower metal elastic sheet to guide a carrier provided with a lens to move up and down. The metal elastic sheet and the carrier are fixed by more stations and the assembly process is complex.
Disclosure of Invention
The present disclosure provides an auto-focusing device and an electronic apparatus to solve the deficiencies in the related art.
According to a first aspect of the embodiments of the present disclosure, an automatic focusing device is provided, which includes a housing, a focusing coil disposed in the housing, a carrier for loading lenses, and a guiding structure for guiding a moving direction of the carrier;
the carrier comprises a focusing magnet, the focusing magnet can be matched with the focusing coil to drive the carrier to move, and the carrier further comprises a matching part, and the matching part is matched with the guide structure to enable the carrier to move along the vertical direction of the guide structure.
Optionally, one of the guide structure and the matching part is a guide post, the other is a hole structure matched with the guide post, and the guide post is matched with the hole structure to form a hole shaft.
Optionally, the guide structure is a guide post fixed on the housing, the matching portion is a hole structure formed on the carrier, and the hole structure is sleeved on the guide post.
Optionally, the number of the guide structures is two, the two guide structures are respectively located at two diagonal positions on the housing, the carrier accommodating portion includes two of the matching portions, and when the carrier is assembled in the housing, the matching portions are located on the carrier and correspond to the guide structures.
Optionally, clearance grooves are further formed in two sides of the matching portion, so that the thickness of the matching portion is smaller than that of the carrier.
Optionally, the guide structure is a hole groove formed on the housing, the fitting portion is a guide post disposed on the carrier, and at least a portion of the guide post is accommodated in the hole groove.
Optionally, the housing includes a base and an upper shell matched with the base, an accommodating space for accommodating the focusing coil and the carrier is formed in the base, the focusing coil is fixedly disposed on the base, and the carrier is located in a surrounding space formed by surrounding the focusing coil.
Optionally, the base further includes a placing portion for placing the focusing coil, and a thickness difference exists between the placing portion and the base for matching with a thickness of the focusing coil.
Optionally, the base further includes two conductive parts disposed in the base, the conductive parts penetrate through the base, and the conductive parts are used for connecting the focusing coil and an external power supply, so that the focusing coil and the external power supply form a closed circuit.
According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device including the autofocus device provided according to the first aspect of the embodiments of the present disclosure.
According to the embodiment, the guide structure is matched with the matching part on the carrier to guide the carrier to move, the assembly process of the guide structure and the matching part is simple, the occupied stations are few, the production efficiency of products can be improved, and the structure of the automatic focusing device is simplified.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is an exploded view of an autofocus device shown in accordance with an exemplary embodiment.
Fig. 2 is an exploded view of the carrier shown in fig. 1.
Fig. 3 is a schematic diagonal cross-sectional view illustrating an assembly of a guide structure with a mating portion according to another exemplary embodiment.
Fig. 4 is a schematic view of the base shown in fig. 1 in cooperation with a focusing coil.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The auto-focusing apparatus in the related art uses a voice coil motor to realize an auto-focusing function of the auto-focusing apparatus. Specifically, the carrier and the focusing coil are adopted to generate an interaction force in a magnetic field, and the carrier provided with the lens is guided to move up and down by using an upper metal elastic sheet and a lower metal elastic sheet. But has the following disadvantages:
1. the upper and lower ends of the carrier with the lens are fixed by the upper and lower metal elastic sheets, more stations are needed, and the process machining and assembly are complex.
2. The sizes of the upper metal elastic sheet and the lower metal elastic sheet are very small, and the size of a joint is basically dozens of micrometers. After a strict reliability test, the inventor finds that the elastic sheet is easy to generate micro deformation and can seriously generate a fracture phenomenon.
3. The metal elastic sheet is made of alloy, and high elasticity and high strength are required; the raw materials are basically imported daily and American raw materials, a precise etching process is needed, the number of manufacturers is small, the use cost is high, and the raw materials are not convenient to obtain.
The present disclosure thus provides an autofocus device and an electronic apparatus capable of solving at least some of the problems described above.
FIG. 1 is an exploded view of an autofocus device shown in accordance with an exemplary embodiment. The present disclosure provides an electronic device including the automatic focusing apparatus 100 shown in fig. 1. The electronic device can be a mobile phone, a notebook, a palm computer or a tablet computer.
As shown in fig. 1, the automatic focusing apparatus 100 includes a housing 1, a focusing coil 2, a carrier 3, and a guide structure 4. The shell 1 comprises a base 11 and an upper shell 12 matched with the base 11, and the focusing coil 2 and the carrier 3 are arranged between the base 11 and the upper shell 12. The carrier 3 is used for loading lenses, and a through hole 121 is formed in the middle of the upper shell 12 for allowing light to irradiate the lenses on the carrier 3. The focusing coil 2 encloses an enclosed space 21, and the carrier 3 is arranged in the enclosed space 21. The carrier 3 is provided with a focusing magnet 34, the focusing coil 2 generates electromagnetic force after being electrified, the electromagnetic force and the focusing magnet 34 generate magnetic interaction force, and the interaction force can drive the carrier 3 to move so as to realize focusing work of lenses on the carrier 3.
Wherein the guiding structure 4 is used for guiding the moving direction of the carrier 3. The carrier 3 further comprises an engaging portion 31, and the engaging portion 31 is engaged with the guide structure 4 to move the carrier 3 in the up-down direction of the guide structure 4. For example, the engaging portion 31 engages with the guide structure 4, so that the carrier 3 moves along the length direction of the guide structure 4, and the length direction of the guide structure 4 coincides with the length direction of the autofocus apparatus 100, so as to realize the up-and-down movement of the carrier 3 in the autofocus apparatus 100 in the direction shown in fig. 1.
Specifically, the guide structure 4 is made of metal. The guide structure 4 is a guide post, which may be a fixing member, such as a cylindrical rod, provided on the base 11 and detachable from the base 11; or a screw fixed on the base 11, the screw part is connected with the base 11 in a threaded way, and the other part is a polished rod matched with the carrier 3 for guiding the carrier 3.
As shown in fig. 1, the base 11 is made of plastic and is rectangular. The four corners of the base 11 are provided with protrusions 13 for matching with the four sides of the upper shell 12. Two diagonal positions of the base 11 are respectively provided with a mounting hole 15, and the mounting holes 15 are positioned at the inner side of the protrusion 13. The number of the guide structures 4 is two, and the two guide structures 4 are respectively arranged in the mounting hole 15. The carrier 3 is made of plastic materials and is rectangular. The carrier 3 includes two of the fitting portions 31, and the two fitting portions 31 are respectively provided at two diagonal positions of the carrier 3. Of course, the number of the guide structure 4 and the engaging portion 31 may be two or more, for example, three or four, and the like, which is determined according to the design requirement.
In this embodiment, the guiding structure 4 is a guiding column fixed on the base 11, and the matching portion 31 is a hole structure formed on the carrier 3. The hole structure comprises a through hole 311, and the through hole 311 is sleeved on the guide post. When the carrier 3 is assembled in the base 11, the position of the matching part 31 on the carrier 3 corresponds to the position of the guide structure 4; and the guide structure 4 penetrates into the matching part 31 to form hole-shaft matching. When the focusing coil 2 cooperates with the focusing magnet 34 to drive the carrier 3 to move, the cooperating portion 31 positions the carrier 3 on the guide structure 4, and the cooperating portion 31 (the carrier 3) moves up and down along the outer edge of the guide structure 4. In other embodiments, the hole structure may also be an open hole formed on the outer edge of the carrier 3, such as a semicircular hole formed on the outer sidewall of the carrier 3.
The guide structure 4 and the matching part 31 form a hole-axis matching, so that the carrier 3 can move by a matching clearance between the guide structure 4 and the matching part 31 in the up-and-down moving process. Therefore, the displacement variable of the carrier is small, and the similar OIS (Optical Image Stabilizer) anti-shake effect can be achieved.
As shown in fig. 2, clearance grooves 32 are further provided on both sides of the fitting portion 31, so that the thickness of the fitting portion 31 is smaller than that of the carrier 3. During the movement of the carrier 3, the guiding structure 4 and the mating portion 31 may rub. In this embodiment, the engaging portion 31 is a hole structure, the guiding structure 4 is a guiding post, and when the guiding structure moves in the engaging portion 31, the contact area between the two is large, which will increase the driving force for driving the carrier 3 and increase the power consumption of the focusing coil 2. The use of the clearance groove 32 can reduce the contact area between the matching part 31 and the guide structure 4, thereby reducing the friction between the matching part and the guide structure, and further saving the power consumption of the focusing coil 2.
In this embodiment, the guiding structure 4 is made of a metal material, is cylindrical, and is slightly affected by deformation or interference of an external force, so that the problem of deformation of the metal elastic sheet caused by the external force in the process of guiding the carrier 3 can be solved. Use this disclosure provide guide structure 4, compare in metal shrapnel, have the advantage that the manufacturing is convenient, required processing technology is few, and with the cooperation portion 31 assembly of carrier 3 is simple, does benefit to and improves production efficiency.
In another embodiment, the guiding structure is a hole slot formed on the housing 1, and the matching portion is a guiding post disposed on the carrier, and the guiding post is at least partially received in the hole slot. The difference from the above embodiment is that the guide structure uses a hole slot as a guide hole, and a guide post is disposed on the carrier and received in the hole slot. The engaging portion moves up and down within the guide structure following the movement of the carrier.
As shown in fig. 3, the guiding structure is a first column 4 '(in a cylindrical shape) disposed on the base 11, two first columns 4' are disposed at opposite corners of the base 11, and a hole groove 41 'is disposed in the first column 4'. The engaging portion is a second cylinder 31 '(cylindrical) disposed on the carrier 3, and the second cylinder 31' protrudes from the lower edge of the carrier 3 and extends downward. When assembling the guiding structure and the carrier, the second cylinder 31 ' is placed into the hole groove 41 ' of the first cylinder 4 '. During the movement of the carrier 3, the hole groove 41 'forms a hole axis fit with the second column 31', and the second column 31 'can move in the hole groove 41' to guide the carrier 3. In other embodiments, the guiding structure is a boss provided on the base 11, and the boss is provided with a hole groove 41'.
For better assembly of the autofocus device 100 and better driving of the carrier 3 by the focusing coil 2, the focusing coil 2 can be fixed to the housing 1 so that the focusing coil 2 is not displaced and the carrier 3 is not affected by its own movement.
Referring to fig. 1 and 4, an accommodating space 111 for accommodating the focusing coil 2 and the carrier 3 is formed in the base 11. The focusing coil 2 is fixedly arranged on the base 11, and the carrier 3 is positioned in a surrounding space 21 formed by surrounding the focusing coil 2. In one embodiment, the base 11 includes a placing portion 14 for placing the focusing coil 2, and the placing portion 14 is a boss formed on the base 11. The placing parts 14 are provided at four corners of the base 11 and are located inside the protrusions 13 at the four corners of the base 11. There is a thickness difference between the placing portion 14 and the base 11 to match the thickness of the focusing coil 2. Placing the focusing coil 2 on the placing portion 14, with the upper end face of the focusing coil 2 being flush with or slightly lower than the end face of the protrusion 13, can reduce the volume of the automatic focusing device 100. In other embodiments, the focusing coil 2 may also be fixed to the upper shell 12.
Further, the base 11 further includes two conductive portions 16 disposed in the base 11. The guide structure 4 is disposed inside the base 11 by Insert Molding (Insert Molding). The conductive part 16 penetrates through the base 11, one end of the conductive part 16 is used for connecting two wire ends of the focusing coil 2, and the other end of the conductive part 16 is used for connecting an external power supply, so that the focusing coil 2 and the external power supply form a closed circuit. The focusing coil 2 is electrically powered by an external power supply to generate electromagnetic force to drive the carrier 3.
The conductive portion 16 may be a metal needle in which a metal piece 17 provided inside the base 11 may be connected. As shown in fig. 1, one of the metal pins 16 is connected with a metal sheet 17, and the metal sheet 17 extends along the inner side of the base 11 between opposite corners of the base 11, so that the connection range of the conductive part 16 and the thread end of the focusing coil 2 can be increased.
According to the technical scheme, the automatic focusing device has the advantages that the guide structure and the matching part matched with the hole shaft are adopted, and the structure of the automatic focusing device is simplified. Because the processing technology and the assembly of guide structure and cooperation portion are simple, occupy the station fewly, can improve production efficiency. The mode of matching the hole shaft is not interfered by the outside, so that the performance of the automatic focusing device is better. Furthermore, the selection of the guide structure and the matching part and the processing resources are convenient to obtain, the process is simple, and the method is suitable for automatic manufacturing, so that the production cost is reduced.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711033893.XA CN107561827B (en) | 2017-10-30 | 2017-10-30 | Autofocus devices and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711033893.XA CN107561827B (en) | 2017-10-30 | 2017-10-30 | Autofocus devices and electronic equipment |
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| Publication Number | Publication Date |
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| CN107561827A CN107561827A (en) | 2018-01-09 |
| CN107561827B true CN107561827B (en) | 2021-06-08 |
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| CN201711033893.XA Active CN107561827B (en) | 2017-10-30 | 2017-10-30 | Autofocus devices and electronic equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145761Y (en) * | 2007-12-29 | 2008-11-05 | 比亚迪股份有限公司 | An autofocus mobile phone camera module |
| CN204287690U (en) * | 2014-10-20 | 2015-04-22 | 三鸣科技(香港)有限公司 | Miniature lens drive device and electronic image capture device |
| US20160048033A1 (en) * | 2014-08-14 | 2016-02-18 | Lg Innotek Co., Ltd. | Lens Moving Apparatus and Camera Module Including the Same |
-
2017
- 2017-10-30 CN CN201711033893.XA patent/CN107561827B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145761Y (en) * | 2007-12-29 | 2008-11-05 | 比亚迪股份有限公司 | An autofocus mobile phone camera module |
| US20160048033A1 (en) * | 2014-08-14 | 2016-02-18 | Lg Innotek Co., Ltd. | Lens Moving Apparatus and Camera Module Including the Same |
| CN204287690U (en) * | 2014-10-20 | 2015-04-22 | 三鸣科技(香港)有限公司 | Miniature lens drive device and electronic image capture device |
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| CN107561827A (en) | 2018-01-09 |
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