CN102790505A - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
- Publication number
- CN102790505A CN102790505A CN2011101298781A CN201110129878A CN102790505A CN 102790505 A CN102790505 A CN 102790505A CN 2011101298781 A CN2011101298781 A CN 2011101298781A CN 201110129878 A CN201110129878 A CN 201110129878A CN 102790505 A CN102790505 A CN 102790505A
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- Prior art keywords
- voice coil
- shell fragment
- containing cavity
- shell
- coil motor
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Abstract
A voice coil motor comprises a casing, a bearing plate, a moving assembly, four magnetic elements and a first elastic sheet. The casing and the bearing plate together enclose a first containing cavity. The casing comprises a top plate, and the top plate comprises four first fixing portions. The moving assembly is movably arranged in the first containing cavity. The four magnetic elements are arranged in the first containing cavity surrounding the moving assembly and fixed on the inner wall of the casing. The first elastic sheet is arranged between the top plate and the moving assembly. The four first fixing portions can tightly press the first elastic sheet on the four magnetic elements so that a fixing assembly used for fixing the magnetic elements and an elastic sheet cover used for fixing the first elastic sheet are omitted, and the voice coil motor is led to be simple in structure.
Description
Technical field
The present invention relates to a kind of voice coil motor.
Background technology
Existing voice coil motor generally has a shell and a loading plate, and said shell and said loading plate surround the containing cavity of a both ends open.Said voice coil motor comprises that also magnetic element, a movable dress group, two shell fragments and two shell fragments that the fixedly dress group that is contained in a both ends open in the said containing cavity, four are fixed on the fixing dress group cover.The activity of said movable dress group is housed in the said fixedly dress group, and said two shell fragments are separately fixed at the two ends of said fixedly dress group, and said two shell fragments lid is pressed on said two shell fragments on the said fixedly dress group respectively.Therefore, the element of existing voice coil motor is many, and complex structure is not easy to assembling.
Summary of the invention
In view of this, be necessary to provide a kind of voice coil motor simple in structure.
A kind of voice coil motor comprises a shell, a loading plate, a movable dress group, at least two magnetic elements and one first shell fragment.Said shell and said loading plate surround one first containing cavity jointly.Said shell comprises a top board.Said top board comprises at least two first fixed parts.Said movable dress group is movably arranged in said first containing cavity.Said at least two magnetic elements are arranged in said first containing cavity around said movable dress group, and are fixed on the inwall of said shell.Said first shell fragment is arranged between said top board and the said movable dress group.Said at least two first fixed parts can tightly be pressed on said first shell fragment on said two magnetic elements at least.
Voice coil motor of the present invention; Said magnetic element directly is fixed on the inwall of said shell; Saved the fixedly dress group that is used for fixing magnetic element, first fixed part of said shell directly is pressed on said first shell fragment on the magnetic element simultaneously, has saved the shell fragment lid that is used for fixing said first shell fragment; Make that the element of said voice coil motor is less, simple in structure.
Description of drawings
Fig. 1 is the structural representation of the voice coil motor of preferred embodiments of the present invention.
Fig. 2 is the decomposing schematic representation of the voice coil motor of Fig. 1.
Fig. 3 is activity dress group and the decomposing schematic representation of magnetic element of the voice coil motor of Fig. 2.
Fig. 4 is the cutaway view of the voice coil motor of Fig. 1.
The main element symbol description
| |
100 |
| |
10 |
| |
11 |
| |
12 |
| First through |
110 |
| First fixed |
111 |
| |
112 |
| Connecting |
112a |
| Kink | 112b |
| Loading |
20 |
| First containing |
201 |
| Second through |
21 |
| |
30 |
| Movable |
31 |
| |
310 |
| |
311 |
| Holddown groove | 311a |
| The | 311b |
| Flange | |
| 312 | |
| End face | 312a |
| The |
316 |
| |
317 |
| Put magnetic portion | 317a |
| Locating |
318 |
| |
32 |
| |
50 |
| The |
51 |
| The inclined- |
53 |
| |
60 |
| Third through- |
610 |
| |
611 |
| First inside |
612 |
| Recess | 612a |
| |
613 |
| Second fixed |
615 |
| |
70 |
| |
71 |
| Second inside |
72 |
| The 3rd fixed |
73 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
See also Fig. 1 and Fig. 2, be a kind of voice coil motor 100 that embodiment of the present invention provides, it comprises a shell 10, loading plate 20, movable dress group 30, four magnetic elements 50, one first shell fragment 60, second shell fragment 70.
Said shell 10 is used to eliminate external electromagnetic field to the interference of said voice coil motor 100 and prevent the work of its exterior electrical components of electromagnetic field effects of said voice coil motor 100.Said shell 10 is by processing with the material (for example ferronickel, stainless iron or galvanized iron etc.) that said magnetic element 50 adsorbs mutually.Said shell 10 has a foursquare top board 11 and four and said top board 11 vertically disposed side plates 12.One first through hole 110 is offered at the center of said top board 11.Said top board 11 comprises four first fixed parts 111, and said four first fixed parts 111 lay respectively at four corners of said top board 11.
Also be provided with four projections 112 on the said top board around " L " type of said first through hole 110 settings.Each projection 112 includes a connecting portion 112a and a kink 112b, and each connecting portion 112a is vertically fixed on the edge of the first corresponding fixed part 111 near said first through hole 110, and with the side of said top board 11 angle in an acute angle.Said kink 112b vertically extends towards the center of said top board 11 from said connecting portion 112a.In this execution mode, the side of said connecting portion 112a and said top board 11 is the angle of 45 degree.
Said loading plate 20 roughly is square, but area is more smaller than the area of said top board 11, makes said shell 10 to detain and establishes and be fixed on the said loading plate 20, to form one first containing cavity 201.The central authorities of said loading plate 20 are provided with one second through hole 21, and said second through hole 21 and the 110 coaxial settings of said first through hole make light can pass loading plate 20.
Said movable dress group 30 is movably arranged in said first containing cavity 201, and said movable dress group 30 comprises a movable accommodating cylinder 31 and is set around the coil 32 of said movable accommodating cylinder 31 outer walls.A second roughly rounded containing cavity 310 that runs through himself is offered at the center of said movable accommodating cylinder 31.Said second containing cavity 310 and the 201 coaxial settings of said first containing cavity are used to accommodate the lens barrel (figure do not show) of a camera lens module.In conjunction with shown in Figure 3, said movable accommodating cylinder 31 comprises that a pedestal 311 and one are from said pedestal 311 outward extending flanges 312.Said pedestal 311 is near said loading plate 20, and said flange 312 is near said top board 11.Said pedestal 311 and said flange 312 are octagon bar shape structure.The distance of the axle center of said second containing cavity 310 to said pedestal 311 drift angles is greater than the distance of the drift angle of axle center to the said flange 312 of said second containing cavity 310.The lateral wall of said pedestal 311 is offered a holddown groove 311a around himself, with ccontaining and fixing said coil 32.Said holddown groove 311a can adjust according to the width of said coil along said second containing cavity, 310 axial width.The lateral wall of said pedestal 311 comprises that four sides 316 and four tilt to be connected the joint face 317 between the adjacent two sides 316 respectively.Said four sides 316 are parallel to each other with four side plates 12 of said shell 10 respectively.Form one between each joint face 317 and the said shell 10 and put the 317a of magnetic portion (see figure 4).Said pedestal 311 comprises a bottom surface 311b towards said loading plate 20, and said flange 312 comprises an end face 312a towards said top board 11.Said second containing cavity 310 in said end face 312a upper edge extend axially out four locating pieces 318 that are provided with around said second containing cavity 310.
Said four magnetic elements 50 are the right-angled triangle column structure, and it comprises two orthogonal right angle faces 51 and an inclined-plane 53 that connects said two right angle faces 51.Said four magnetic elements 50 are contained in respectively in the corresponding 317a of the magnetic portion of putting, with around be arranged on said movable accommodating cylinder 31 around.Two right angle faces 51 of each magnetic element 50 are attracted to respectively on the inwall of corresponding side plate 12 of said shell 10.The inclined-plane 53 of each magnetic element 50 corresponding joint face 317 on the said movable accommodating cylinder 31; And with keep at a certain distance away between the corresponding joint face 317, make that said movable accommodating cylinder 31 can said relatively four magnetic elements 50 axially moving along said second containing cavities 310.Each magnetic element 50 is slightly less than the distance between said top board 11 and the said loading plate 20 along said second containing cavity, 310 axial height.In this execution mode, said magnetic element 50 is a magnet.
As shown in Figure 2, said first shell fragment 60 tightly is pressed on said four magnetic elements 50 by first fixed part 111 of said top board 11.Said first shell fragment 60 is foursquare plate-like structure.The center of said first shell fragment 60 offers a third through-hole 610, said third through-hole 610 and the 110 coaxial settings of said first through hole.Said first shell fragment 60 comprise one around said third through-hole 610 and away from first housing 611 of said third through-hole 610, one around said third through-hole 610 and near first inside casing 612 and four elastic part 613 between said first housing 611 and said first inside casing 612 of said third through-hole 610.Certainly, the number of said elastic part 613 also can be two.Said first housing 611 comprises four second fixed parts 615, and said four second fixed parts 615 lay respectively at four corners of said first housing 611, and corresponding with four first fixed parts 111 of said shell 10 respectively.Each second fixed part 615 is similar right-angled triangle with the first corresponding fixed part 111; And the area of each second fixed part 615 is more than or equal to the area of first fixed part 111 of correspondence; So that first fixed part 111 of said top board 11 when pressure is established said second fixed part 615, can not influence said elastic part 613 and 612 edge said first containing cavity 201 axial the moving of said first inside casing.For the more jail that said first shell fragment 60 and said top board 11 and said movable accommodating cylinder 31 are fixed; Also can be between second fixed part 615 and said top board 11 of first shell fragment 60, carry out a glue between said second fixed part 615 and the corresponding magnetic element 5050.In other embodiments; Said first fixed part 111 also can be other shapes (such as square, circle etc.) with said second fixed part 615, but needs to guarantee that said first fixed part 111 does not influence said elastic part 613 and 612 edge said first containing cavity 201 axial the moving of said first inside casing.
Offer the recess 612a that is used with said locating piece 318 on said first inside casing 612, the opening direction of said recess 612a is connected towards said third through-hole 610 and with said third through-hole 610.Said recess 612a matches with said locating piece 318 said first shell fragment 60 and said movable accommodating cylinder 31 location and fixing.For the more jail that makes that said first shell fragment 60 and said movable accommodating cylinder 31 are fixed, also can between said recess 612a and said locating piece 318, put glue.Certainly, said recess 612a also can not be communicated with said third through-hole 610.
Said recess 612a makes said locating piece 318 pass the top board 11 of first shell fragment 60 to be connected to said shell 10, thereby makes first housing 611 that is in first shell fragment 60 under the non-working condition and first inside casing 612 that assemble be on the different plane respectively.
The shape of said second shell fragment 70 and said first shell fragment 60 are basic identical.Said second shell fragment 70 comprises one second housing 71 and one second inside casing 72.But because the bottom surface 311b of said movable accommodating cylinder 31 is not provided with locating piece, therefore said second inside casing 72 is not offered recess.Said second housing 71 comprises four the 3rd fixed parts 73, and said four the 3rd fixed parts 73 lay respectively at four corners of said second housing 71.Said four the 3rd fixed parts 73 are pressed on the said loading plate 20 by the magnetic element 50 of correspondence respectively.Said second inside casing 72 is fixedly connected with the bottom surface 311b of said movable accommodating cylinder 31.More firm for what said second housing 71 and said loading plate 20 and said magnetic element 50 were fixed, also can between said the 3rd fixed part 73 and said loading plate 20, reach between said the 3rd fixed part 73 and the said magnetic element 50 and carry out a glue.More firm for what said second inside casing 72 and said movable accommodating cylinder 31 were fixed, also can between the bottom surface 311b of said second inside casing 72 and said movable accommodating cylinder 31, carry out a glue.
In other embodiments, also can be at the locating piece 318 corresponding locating pieces on setting and the said end face 312a on the 311b of the bottom surface of said movable accommodating cylinder 31, this moment, the shape and said first shell fragment 60 of said second shell fragment 70 were identical.
In conjunction with shown in Figure 4; The assembling process of said voice coil motor 100 is following: said second shell fragment 70 is placed on the said loading plate 20; And four the 3rd fixed parts 73 of said second shell fragment 70 setting of aliging with four corners of said loading plate 20; The 311b point glue in the bottom surface of said movable accommodating cylinder 31; Said movable accommodating cylinder 31 is fixed on second inside casing 72 of said second shell fragment 70; With said coil 32 windings and be fixed in the holddown groove 311a of said movable accommodating cylinder 31, said four magnetic elements 50 are arranged in said first containing cavity 201 around said movable accommodating cylinder 30, and are pressed on respectively on four the 3rd fixed parts 73 of said second shell fragment 70; Three locating pieces 318 of said movable accommodating cylinder 31 are set in respectively in three recess 612a of said first shell fragment 60; Thereby first inside casing 612 of said first shell fragment 60 is fixed on the said movable accommodating cylinder 31, and four second fixed parts 615 and the setting of aliging at said four magnetic elements 50 with said first shell fragment 60 are located at said shell 10 on said first shell fragment 60; And be fixed on the said loading plate 20 through glue or other fixed forms, so that first fixed part 111 of said shell 10 tightly is pressed on four second fixed parts 615 of said first shell fragment 60 on said four magnetic elements 50.
Be appreciated that said movable accommodating cylinder 31 and said first shell fragment 60 flew out when electric current that said four projections 112 can prevent said coil 32 was excessive in said first containing cavity 201.
The course of work of said voice coil motor 100 is following: said coil 32 is communicated with external circuit; Making has electric current to flow in the said coil 32; And alive coil 32 receives the effect of power in the magnetic field that said four magnetic elements 50 produce, to drive said movable accommodating cylinder 31 moving axially along said first containing cavity 201.Because said camera module (not shown) is fixed in the said movable accommodating cylinder 31, thereby makes that said camera module also can moving axially along said first containing cavity 201.
Certainly, also can have only first shell fragment 60 or have only second shell fragment 70.
The number that is appreciated that said magnetic element 50 also can be not limited to present embodiment for five, six or more, as long as this shell 10 and said movable accommodating cylinder 31 can complement each other to form number the put magnetic portion 317a identical with said magnetic element 50 numbers.
Certainly, this shell 10 and said movable accommodating cylinder 31 also can be other geometries such as triangle, pentagon, hexagon.
Certainly, said four projections 112 also can be one-body molded with said shell 10.The quantity of said projection 112 also is not limited to this execution mode.
Certainly, the quantity of said first fixed part 111, said second fixed part 615 and said the 3rd fixed part 73 is not limited to this execution mode.
Certainly, in other embodiments, said shell 10 also can be one-body molded with said loading plate 20.
Voice coil motor of the present invention; Directly be fixed on by said shell said magnetic element and said movable dress group is formed puts in the magnetic portion; Saved the fixedly dress group that is used for fixing magnetic element; Top board with said shell is pressed on said first shell fragment on the said magnetic element simultaneously, with said magnetic element said second shell fragment is pressed on the said loading plate, has saved two shell fragment lids that are used for fixing said first shell fragment and said second shell fragment; Make that the element of said voice coil motor is less, simple in structure.
It is understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection range that all should belong to claim of the present invention with distortion.
Claims (9)
1. voice coil motor; Comprise a shell, a loading plate, a movable dress group, at least two magnetic elements and one first shell fragment; Said shell and said loading plate surround one first containing cavity jointly, and said shell comprises a top board, and said movable dress group is movably arranged in said first containing cavity; It is characterized in that; Said top board comprises at least two first fixed parts, and said at least two magnetic elements are arranged in said first containing cavity around said movable dress group, and are fixed on the inwall of said shell; Said first shell fragment is arranged between said top board and the said movable dress group, and said at least two first fixed parts tightly are pressed on said first shell fragment on said two magnetic elements at least.
2. voice coil motor as claimed in claim 1; It is characterized in that; Said first shell fragment comprises one first housing and one first inside casing; Said movable dress group is fixed on said first inside casing, and said first housing comprises at least two second fixed parts, and said at least two second fixed parts are corresponding with said at least two first fixed parts respectively; Said at least two first fixed parts are pressed on said two second fixed parts on said two magnetic elements at least at least, and do not influence said movable dress group along axial the moving of said first containing cavity.
3. voice coil motor as claimed in claim 1; It is characterized in that; One first through hole is offered at the center of said top board; Around at least two projections of the said first through hole setting, said at least two projections are used to stop that said movable dress group flies out from said first containing cavity on the said top board, and each projection comprises a connecting portion and a kink; Said connecting portion is vertically fixed on the edge of said first fixed part near said first through hole, and said kink vertically extends towards the direction at said top board center from said connecting portion.
4. voice coil motor as claimed in claim 1; It is characterized in that; Said voice coil loudspeaker voice coil horse also comprises one second shell fragment; Said second shell fragment is between said at least two magnetic elements and said loading plate, and said second shell fragment comprises one second housing and one second inside casing, and said second housing comprises at least two the 3rd fixed parts; Said at least two the 3rd fixed parts are corresponding with said at least two magnetic elements respectively, so that said at least two magnetic elements can tightly be pressed on said two the 3rd fixed parts on the said loading plate at least.
5. voice coil motor as claimed in claim 4 is characterized in that, the shape of said second shell fragment and said first shell fragment are identical.
6. voice coil motor as claimed in claim 1 is characterized in that, said movable dress group comprises a movable accommodating cylinder and a coil, offers a holddown groove around himself on the lateral wall of said movable accommodating cylinder, and said coil is housed in the said holddown groove.
7. voice coil motor as claimed in claim 6 is characterized in that, one second containing cavity is offered at the center of said movable accommodating cylinder, and said second containing cavity and the coaxial setting of said first containing cavity are used to accommodate the lens barrel of a camera lens module.
8. voice coil motor as claimed in claim 7 is characterized in that, said movable accommodating cylinder comprises that a pedestal and one are from the outward extending flange of said pedestal; Said pedestal is near said loading plate; Said flange is near said top board, and said holddown groove is opened on the lateral wall of said pedestal, and said flange comprises an end face towards said top board; On the said end face near the position of said second containing cavity at least two locating pieces that extend axially out along said second containing cavity; Offer at least two and the corresponding recess of said locating piece on said first shell fragment, said locating piece passes said recess, so that said first shell fragment is connected on the said top board.
9. voice coil motor as claimed in claim 1 is characterized in that, said shell is by processing with the material that said magnetic element adsorbs mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101298781A CN102790505A (en) | 2011-05-19 | 2011-05-19 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101298781A CN102790505A (en) | 2011-05-19 | 2011-05-19 | Voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102790505A true CN102790505A (en) | 2012-11-21 |
Family
ID=47155826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101298781A Pending CN102790505A (en) | 2011-05-19 | 2011-05-19 | Voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102790505A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591513A (en) * | 2014-10-24 | 2016-05-18 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor |
| CN108241197A (en) * | 2016-12-23 | 2018-07-03 | 台湾东电化股份有限公司 | Driving mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200715687A (en) * | 2005-10-12 | 2007-04-16 | Tdk Taiwan Corp | Planar spring leaf of voice coil motor |
| US20080007850A1 (en) * | 2006-06-09 | 2008-01-10 | Tricore Corporation | Voice coil motor type focusing actuator |
| US20080186601A1 (en) * | 2007-02-02 | 2008-08-07 | Mitsumi Electric Co., Ltd. | Camera module |
| CN101563836A (en) * | 2006-11-23 | 2009-10-21 | Lg伊诺特有限公司 | Lens driving apparatus |
-
2011
- 2011-05-19 CN CN2011101298781A patent/CN102790505A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200715687A (en) * | 2005-10-12 | 2007-04-16 | Tdk Taiwan Corp | Planar spring leaf of voice coil motor |
| US20080007850A1 (en) * | 2006-06-09 | 2008-01-10 | Tricore Corporation | Voice coil motor type focusing actuator |
| CN101563836A (en) * | 2006-11-23 | 2009-10-21 | Lg伊诺特有限公司 | Lens driving apparatus |
| US20080186601A1 (en) * | 2007-02-02 | 2008-08-07 | Mitsumi Electric Co., Ltd. | Camera module |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591513A (en) * | 2014-10-24 | 2016-05-18 | 鸿富锦精密工业（深圳）有限公司 | Voice coil motor |
| CN108241197A (en) * | 2016-12-23 | 2018-07-03 | 台湾东电化股份有限公司 | Driving mechanism |
| CN108241197B (en) * | 2016-12-23 | 2021-08-31 | 台湾东电化股份有限公司 | Driving mechanism |
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Application publication date: 20121121 |