CN211670756U - Voice coil motor structure - Google Patents
Voice coil motor structure Download PDFInfo
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- CN211670756U CN211670756U CN202020309931.0U CN202020309931U CN211670756U CN 211670756 U CN211670756 U CN 211670756U CN 202020309931 U CN202020309931 U CN 202020309931U CN 211670756 U CN211670756 U CN 211670756U
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- elastic sheet
- lens holder
- voice coil
- coil motor
- motor structure
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Abstract
The utility model discloses a voice coil motor structure, it includes the casing, can reciprocate cooperate lens holder in the casing, cooperate drive coil and at least one on the lens holder perisporium fix the drive magnet on the casing lateral wall, wherein a voice coil motor structure still include first shell fragment, the inner and the outer end of first shell fragment link to each other with lens holder and casing respectively, the coating on the surface of first shell fragment has the film that meets an emergency. The utility model discloses a set up first shell fragment and strain film and can feed back the actual movement track of lens holder to transfer to make the movement track of lens holder more accurate, so that the utility model discloses a focus more quick accurate.
Description
Technical Field
The utility model relates to a voice coil motor field especially indicates a voice coil motor structure.
Background
The micro automatic focusing camera is widely applied to products such as mobile phones, automobiles, unmanned planes, security monitoring, smart homes and the like. The common micro automatic focusing camera is driven by a voice coil motor to move along the optical axis of the lens; the general voice coil motor mainly comprises a shell, a lens support movably matched in the shell, a driving coil matched on the lens support and at least one driving magnet fixed in the shell, wherein the lens support is fixed on the lens support, the shell is provided with a light through hole opposite to a lens, and when the voice coil motor is used, the current input to the driving coil is controlled through an external control unit so as to drive the magnet and the driving coil to interact to drive the lens support to move, so that the automatic focusing function is realized.
However, due to the influence of external factors, the current input to the driving coil by the external control unit cannot cause the lens holder to drive the lens holder to move to a specified position to realize accurate focusing, that is, the lens holder and the lens holder have movement errors, which causes the problems of inaccurate focusing of the automatic focusing motor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a voice coil motor structure, it is focused more quick accurate.
In order to achieve the above purpose, the solution of the present invention is:
a voice coil motor structure comprises a shell, a lens bracket which can move up and down and is matched in the shell, a driving coil matched on the peripheral wall of the lens bracket and at least one driving magnet fixed on the side wall of the shell; the voice coil motor structure further comprises a first elastic sheet, the inner end and the outer end of the first elastic sheet are respectively connected with the lens support and the shell, and a strain film with a strain effect is coated on the surface of the first elastic sheet.
The voice coil motor structure further comprises a second elastic sheet, the inner end and the outer end of the second elastic sheet are respectively connected with the lens support and the shell, and the first elastic sheet and the second elastic sheet are arranged in axial symmetry relative to the central shaft of the lens support.
The casing includes upper cover and the base that links to each other with upper cover bottom opening, and the outer end of first shell fragment and the outer end of second shell fragment link to each other with the base.
The bottom of base is equipped with two connecting terminals that downwardly extend, and two connecting terminals are connected with the foil gage electricity that coats on first shell fragment.
The base is rectangular, one set of two opposite corners of the base are respectively provided with a first supporting column and a second supporting column which are raised upwards, the outer end of the first elastic sheet and the outer end of the second elastic sheet are respectively connected with the top of the first supporting column and the top of the second supporting column, and the inner end of the first elastic sheet and the inner end of the second elastic sheet are connected with the top of the lens support.
An upper elastic sheet is arranged between the upper end of the lens support and the inner top wall of the upper cover, and a lower elastic sheet is arranged between the lower end of the lens support and the upper part of the base.
After the scheme is adopted, the utility model has the characteristics of it is following:
1. the utility model can feed back the actual movement track of the lens bracket by arranging the first elastic sheet and the strain film, thereby adjusting the current intensity of the driving coil and eliminating the movement error of the lens bracket, and the movement track of the lens bracket is more accurate, so that the focusing of the utility model is faster and more accurate;
2. the utility model discloses still be provided with the second shell fragment, the inner and the outer end of first shell fragment link to each other with lens holder and casing respectively, the inner and the outer end of second shell fragment link to each other with lens holder and casing respectively, and first shell fragment and second shell fragment are the axisymmetric setting about the lens holder center pin, can make first shell fragment and second shell fragment can be even and avoid the lens holder to take place the slope at the removal in-process to the application of force of lens holder like this.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a top view of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view B-B of FIG. 3;
description of reference numerals:
a housing 1, an upper cover 11, a base 12, a connecting terminal 120, a first supporting column 121, a second supporting column 122,
the lens holder 2 is provided with a lens holder,
the drive coils 3 are driven in such a way that,
the magnet (4) is driven by the driving magnet,
the first elastic sheet 5 is provided with a first elastic sheet,
the second elastic sheet 6 is provided with a second elastic sheet,
the strain gauge film (7) is,
the upper elastic sheet 8 is arranged on the upper side,
and a lower elastic sheet 9.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
As shown in fig. 1 to 5, the present invention discloses a voice coil motor structure, which includes a housing 1, a lens holder 2 fitted in the housing 1 and capable of moving up and down, a driving coil 3 fitted on the peripheral wall of the lens holder 2, and at least one driving magnet 4 fixed on the side wall 1 of the housing. The utility model discloses when using, drive coil 3 is connected with an external control unit (not shown) electricity, and external control unit is to drive coil 3 input current for drive magnet 4 and drive coil 3 interact and drive lens holder 2 reciprocates.
As shown in fig. 1 to 5, the key point of the present invention is: the utility model also comprises a first elastic sheet 5, the inner end and the outer end of the first elastic sheet 5 are respectively connected with the lens bracket 2 and the shell, and the surface of the first elastic sheet 5 is coated with a strain film 7 with strain effect; this sample utility model discloses when externally control unit control lens holder 2 reciprocated, lens holder 2 can drive the deformation of first shell fragment 5, the deformation of first shell fragment 5 can drive the deformation of foil gage 7 and make foil gage 7's resistance value change, foil gage 7 then is connected with the external control unit electricity, make foil gage 7's resistance value change convertible for current variation or voltage variation and export for external control unit, so that external control unit carries out the negative feedback to drive coil 3's current strength and adjusts, and then adjust lens holder 2's motion in order to eliminate lens holder 2's movement error, make lens holder 2's movement track more accurate, thereby make the utility model discloses a focus more quick accurate. With reference to fig. 1 to 5, the utility model discloses still can include second shell fragment 6, the inner and the outer end of second shell fragment 6 link to each other with lens holder 2 and casing respectively, and first shell fragment 5 and second shell fragment 6 are axisymmetric setting about lens holder 2 center pin, and first shell fragment 5 and second shell fragment 6 can be even and avoid lens holder 2 to take place the slope at the removal in-process to the application of force of lens holder 2 like this.
With reference to fig. 1 to 5, the housing 1 includes an upper cover 11 and a base 12 connected to an opening at the bottom of the upper cover 11, and the upper cover 11 and the base 12 can be connected by clamping or screwing; the number of the driving magnets 4 can be four, and the four magnets 4 are arranged on the inner wall of the upper cover 11 in an axial symmetry manner; the bottom of the base 12 may be provided with two connection terminals 120 extending downward, and the two connection terminals 120 are electrically connected to the strain film 7 coated on the first elastic sheet 5 through a wire or a flexible circuit board, so that the strain film 7 is electrically connected to an external control unit through the two connection terminals 120.
As shown in fig. 1 and 5, the outer end of the first resilient tab 5 and the outer end of the second resilient tab 6 may be connected to the base 12; specifically, the base 12 is rectangular, a group of two opposite corners of the base 12 are respectively provided with a first supporting column 121 and a second supporting column 122 which are protruded upwards, the outer end of the first elastic sheet 5 and the outer end of the second elastic sheet 6 are respectively connected with the top of the first supporting column 121 and the top of the second supporting column 122, the inner end of the first elastic sheet 5 and the inner end of the second elastic sheet 6 are connected with the top of the lens support 2, and thus when the lens support 2 moves up and down, the lens support 2 can drive the first elastic sheet 5 and the second elastic sheet 6 to deform; the strain film 7 may be coated on the upper surface or the lower surface of the first elastic sheet 5. As shown in fig. 1, 4 and 5, an upper elastic sheet 8 is disposed between the upper end of the lens holder 2 and the inner top wall of the upper cover 11, and a lower elastic sheet 9 is disposed between the lower end of the lens holder 2 and the upper portion of the base 12, so that a restoring force can be applied to the lens holder 2 through the upper elastic sheet 8 and the lower elastic sheet 9, so that the lens holder 2 can be quickly restored to an initial position when the driving coil 3 is not energized. It should be noted that the outer end of the first elastic sheet 5 and the outer end of the second elastic sheet 6 are not limited to be connected to the base 12, and the outer end of the first elastic sheet 5 and the outer end of the second elastic sheet 6 may also be connected to the upper cover 11.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (6)
1. A voice coil motor structure comprises a shell, a lens bracket which can move up and down and is matched in the shell, a driving coil which is matched on the peripheral wall of the lens bracket and at least one driving magnet which is fixed on the side wall of the shell, and is characterized in that: the lens holder is characterized by further comprising a first elastic sheet, the inner end and the outer end of the first elastic sheet are connected with the lens holder and the shell respectively, and a strain film with a strain effect is coated on the surface of the first elastic sheet.
2. A voice coil motor structure as claimed in claim 1, wherein: the lens holder is characterized by further comprising a second elastic sheet, the inner end and the outer end of the second elastic sheet are respectively connected with the lens holder and the shell, and the first elastic sheet and the second elastic sheet are arranged in axial symmetry about a central shaft of the lens holder.
3. A voice coil motor structure as claimed in claim 2, wherein: the casing includes upper cover and the base that links to each other with upper cover bottom opening, and the outer end of first shell fragment and the outer end of second shell fragment link to each other with the base.
4. A voice coil motor structure as claimed in claim 3, wherein: the bottom of base is equipped with two connecting terminals that downwardly extend, and two connecting terminals are connected with the foil gage electricity that coats on first shell fragment.
5. A voice coil motor structure as claimed in claim 3, wherein: the base is rectangular, one set of two opposite corners of the base are respectively provided with a first supporting column and a second supporting column which are raised upwards, the outer end of the first elastic sheet and the outer end of the second elastic sheet are respectively connected with the top of the first supporting column and the top of the second supporting column, and the inner end of the first elastic sheet and the inner end of the second elastic sheet are connected with the top of the lens support.
6. A voice coil motor structure as claimed in claim 3, wherein: an upper elastic sheet is arranged between the upper end of the lens support and the inner top wall of the upper cover, and a lower elastic sheet is arranged between the lower end of the lens support and the upper part of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020309931.0U CN211670756U (en) | 2020-03-13 | 2020-03-13 | Voice coil motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020309931.0U CN211670756U (en) | 2020-03-13 | 2020-03-13 | Voice coil motor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211670756U true CN211670756U (en) | 2020-10-13 |
Family
ID=72742361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020309931.0U Active CN211670756U (en) | 2020-03-13 | 2020-03-13 | Voice coil motor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211670756U (en) |
-
2020
- 2020-03-13 CN CN202020309931.0U patent/CN211670756U/en active Active
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