CN214281192U - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
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- CN214281192U CN214281192U CN202120216816.3U CN202120216816U CN214281192U CN 214281192 U CN214281192 U CN 214281192U CN 202120216816 U CN202120216816 U CN 202120216816U CN 214281192 U CN214281192 U CN 214281192U
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Abstract
The utility model relates to the technical field of cameras, and discloses a voice coil motor, which comprises a base, a magnet, a lens base and a coil; the base is provided with a first through hole; the magnets are arranged on the base, are arranged in a plurality and are distributed around the first through holes so as to participate in defining accommodating positions; the lens base is connected with the base through the conductive elastic sheet so as to be suspended in the accommodating position; the coils are arranged on the lens base and are in one-to-one correspondence with the magnets; the conductive elastic sheet is connected with the coils through a surface mounting technology, and all the coils are connected in series. Based on the structure, the conductive elastic sheet can be used as a conductive element for conducting the coil, so that the wire-crossing operation can be omitted in the production process of the voice coil motor, the winding step is simplified, the winding difficulty is reduced, the production efficiency and the yield of the voice coil motor can be improved, and the production cost is reduced; meanwhile, the conductive elastic sheet is connected with the coil through the surface mounting technology, so that adverse effects caused by traditional welding can be effectively eliminated.
Description
Technical Field
The utility model relates to a camera technical field especially relates to a voice coil motor.
Background
A Voice Coil Motor (VCM), also called as a Voice Coil driver (VCA), is a device for converting electrical energy into mechanical energy, can implement linear and limited swing angle motion, and is mainly applied to a camera module.
The voice coil motor is generally divided into a moving coil type and a moving magnet type, and the moving coil type voice coil motor mainly comprises a lens base, a magnet, a coil, an upper elastic sheet and a lower elastic sheet; the lens base is used for mounting a lens; the magnets are arranged on two sides of the mirror base and are fixed to provide a constant permanent magnetic field; the coil is arranged on the lens base and is opposite to the magnet, when the coil is electrified, the coil can be acted by Lorentz force, and the coil drives the lens base and the lens to move up and down according to the left-hand rule so as to realize focusing; the upper elastic sheet and the lower elastic sheet are used for pressing the lens base so as to play a role in stabilizing, buffering and centering the lens.
When the voice coil motor adopting the structure is produced, the wire is wound on the large winding post of the lens base to form two coils, the wire is crossed to conduct the two coils, and the wire is wound on the small winding post of the lens base in the wire crossing process to form a welding position for connecting with the lower elastic sheet. Obviously, the winding on the lens base which is a small non-metal part with a complex structure has higher difficulty, higher cost and lower efficiency and yield. In addition, the welding position is connected with the lower elastic sheet in a welding mode, so that adverse effects can be brought, for example, the mirror base can be burnt due to high temperature, the lower elastic sheet can deform to cause elastic distortion, the height of a welding point can bring space interference and the like, and therefore the design of the welding position and the debugging and welding process also need to take a lot of efforts.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a voice coil motor that the process is simple, be convenient for production, with low costs, yields height, performance are excellent.
In order to achieve the above object, the present invention provides a voice coil motor, which includes:
a base having a first through hole;
the magnets are arranged in multiple groups and distributed around the first through hole so as to participate in defining a containing position;
the lens base is connected with the base through a conductive elastic sheet so as to be suspended in the containing position, and the lens base is provided with a second through hole coaxial with the first through hole; and
the coils are arranged on the microscope base and correspond to the magnets one by one;
the shell is arranged on the base and covers other parts, and the shell is provided with a third through hole which is coaxial with the first through hole and the second through hole;
the conductive elastic sheet is connected with the coils through a surface mounting technology, and all the coils are connected in series.
In some embodiments of the present application, the coil is disposed on the outer side surface of the lens holder, the conductive elastic piece has a bending portion extending to the outer side of the coil, and the conductive elastic piece is connected to the bending portion through a surface mount technology and the coil.
In some embodiments of the present application, the outer side surface of the lens holder has bosses equal to the number of the coils, and each of the coils is respectively and annularly arranged on the boss corresponding to the coil.
In some embodiments of the present application, the magnet is set to two sets, and the two are located respectively the relative both sides of first through-hole, it is limited to two sets to hold the position between the magnet, two the coil is located respectively two relative lateral surfaces of microscope base, and respectively with two sets of magnet homonymy sets up.
In some embodiments of the present application, the number of the conductive elastic pieces is three, and the conductive elastic pieces are respectively referred to as a first conductive elastic piece, a second conductive elastic piece and a third conductive elastic piece;
the first conductive elastic sheet is used for being connected with the anode of a power supply, and the first conductive elastic sheet is connected with any one of the two coils through a surface mounting technology;
the second conductive elastic sheet is used for being connected with the negative electrode of a power supply, and the second conductive elastic sheet is connected with the other of the two coils through the surface mounting technology;
the third conductive elastic sheet is provided with two bending parts, and the third conductive elastic sheet is respectively connected with the two coils through the surface mounting technology and the two bending parts.
In some embodiments of the present application, the first conductive elastic piece and the second conductive elastic piece are disposed at the same side of the first through hole, and the third conductive elastic piece is disposed at one side of the first through hole away from the first conductive elastic piece and the second conductive elastic piece.
In some embodiments of the present application, the base includes base body and locates the stand column body of base body side surface, first through-hole is located on the base body, the stand column body is established to a plurality ofly and distributes around first through-hole to participate in injecing the appearance position, electrically conductive shell fragment is located base body with connect the two between the mirror seat.
In some embodiments of the present application, the upright columns are set to be four and arranged in a rectangular shape, and any one of two sets of magnets is set between any two adjacent upright columns, and the other set of magnets is set between the other two adjacent upright columns.
In some embodiments of the present application, the voice coil motor further includes an annular elastic sheet, which is disposed on a side of the mirror base away from the conductive elastic sheet and connects the mirror base and the upright post.
In some embodiments of the present application, the magnet is disposed on the base or on an inner sidewall of the housing.
The utility model provides a voice coil motor, compared with the prior art, its beneficial effect lies in:
the conductive elastic sheet can be used for pressing the lens base to play a role in stabilizing, buffering and centrally placing the lens, and can also serve as a conductive element for conducting a coil, so that the wire-crossing operation can be omitted in the production process of the voice coil motor, the winding step is simplified, the winding difficulty is reduced, the production efficiency and the yield of the voice coil motor can be improved, and the production cost is reduced; meanwhile, the conductive elastic sheet is connected with the coil through a surface mounting technology with mature technology, so that adverse effects caused by traditional welding can be effectively eliminated, the lens base cannot be burnt due to high temperature, the conductive elastic sheet cannot deform to cause elastic distortion, the problems of space interference caused by the height of welding spots and the like do not exist, the technological requirements of the voice coil motor can be greatly reduced, and the working performance of the voice coil motor is improved.
Drawings
Fig. 1 is an exploded view of a voice coil motor according to an embodiment of the present invention (the bent portion of the conductive elastic piece is not bent);
fig. 2 is a schematic view of the conductive elastic piece according to the embodiment of the present invention before being connected to the coil (the bent portion of the conductive elastic piece is not bent);
fig. 3 is a schematic diagram of the embodiment of the present invention after the conductive elastic piece is connected to the coil (the bending portion of the conductive elastic piece is bent).
In the figure: 1. a base; 11. a base body; 12. a vertical column; 101. a first through hole; 2. a magnet; 3. a lens base; 301. a second through hole; 302. a boss; 4. a coil; 5. a conductive spring plate; 5a, a first conductive elastic sheet; 5b, a second conductive elastic sheet; 5c, a third conductive elastic sheet; 501. a bending section; 6. an annular spring plate; 7. a housing; 701. a third via.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first" and "second" are used for descriptive purposes only to distinguish one type of technical feature from another, and are not to be construed as indicating or implying any relative importance, order or quantity of such technical features, i.e., a "first" technical feature may be referred to as a "second" technical feature, a "second" technical feature may also be referred to as a "first" technical feature, and a technical feature defined as "first" or "second" may explicitly or implicitly include one or more such technical features. In addition, unless otherwise specified, "a plurality" means two or more.
It is emphasized that, in the description of the present application, the terms "mounted", "connected" and "connected", unless expressly specified or limited otherwise, are to be construed broadly, e.g. as meaning fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1 to 3, an embodiment of the present invention provides a voice coil motor, which mainly includes a base 1, a magnet 2, a lens holder 3, and a coil 4; the base 1 has a first through hole 101; the magnets 2 are arranged on the base 1, are arranged in multiple groups and are distributed around the first through hole 101 so as to participate in defining a containing position and provide a constant permanent magnetic field; the lens base 3 is connected with the base 1 through the conductive elastic sheet 5 so as to be suspended in the accommodating position, and is provided with a second through hole 301 which is coaxial with the first through hole 101, and the second through hole 301 is used for mounting a lens; the coils 4 are arranged on the lens base 3 and are in one-to-one correspondence with the magnets 2, and when the coils 4 are electrified, the coils 4 can drive the lens base 3 and the lens to move up and down under the action of Lorentz force so as to realize focusing; in addition, the conductive spring 5 is connected to the coils 4 by Surface Mount Technology (SMT), and all the coils 4 are connected in series.
Based on the structure, the conductive elastic sheet 5 can be used for pressing the lens base 3 to play a role in stabilizing, buffering and centrally placing the lens, and can also serve as a conductive element for conducting the coil 4, so that the wire-crossing operation can be omitted in the production process of the voice coil motor, the winding step is simplified, the winding difficulty is reduced, the production efficiency and the yield of the voice coil motor can be improved, and the production cost is reduced; meanwhile, the conductive elastic sheet 5 and the coil 4 are connected through a surface mounting technology with mature technology, so that adverse effects caused by traditional welding can be effectively eliminated, the lens base 3 cannot be burnt due to high temperature, the conductive elastic sheet 5 cannot deform to cause elastic distortion, the problems of space interference caused by the height of welding spots and the like do not exist, the technological requirements of the voice coil motor can be greatly reduced, and the working performance of the voice coil motor is improved.
Specifically, as shown in fig. 1 to 3, the base 1 includes a base body 11 and a plurality of upright posts 12 disposed on a side surface of the base body 11, the first through holes 101 are disposed on the base body 11, and the upright posts 12 are disposed in a plurality and distributed around the first through holes 101 to participate in defining the accommodating positions; the conductive elastic sheet 5 is arranged between the base body 11 and the mirror base 3 and connected with the base body and the mirror base.
Further, the coil 4 is disposed on the outer side surface of the lens holder 3, the conductive elastic sheet 5 has a bending portion 501 extending to the outer side of the coil 4, and the conductive elastic sheet 5 is connected to the bending portion 501 through the surface mount technology and the coil 4. Optionally, the outer side surface of the lens holder 3 has bosses 302 equal to the number of the coils 4, and each coil 4 is respectively and annularly arranged on the boss 302 corresponding to the coil 4. Based on this, in the production process of the voice coil motor, firstly, winding is carried out on the jig so as to form a coil 4; after the conductive elastic sheet 5 is etched, the coil 4 is connected with the bending part 501 of the conductive elastic sheet 5, which is not bent yet, by a surface mounting technology, so that the coil 4 and the conductive elastic sheet 5 form an integrated part; after the integrated component and the lens holder 3 are placed in the accommodating position, the metal plate bending process is adopted to bend the bending part 501 of the conductive elastic sheet 5, so that the coil 4 can be smoothly installed on the boss 302 of the lens holder 3.
Preferably, as shown in fig. 1, in the present embodiment, two sets of magnets 2 are provided, which are respectively disposed on two opposite sides of the first through hole 101, and the accommodating position is defined between the two sets of magnets 2; correspondingly, the number of the coils 4 is two, and the two coils are respectively arranged on two opposite outer side surfaces of the lens base 3 and are respectively arranged on the same side with the two groups of magnets 2. So, when this voice coil motor during operation, mirror base 3 can receive the effect of the lorentz power of symmetry, and then the atress is more even, and the focusing precision is higher.
Optionally, the upright columns 12 are arranged in a rectangular shape, any one of the two groups of magnets 2 is arranged between any two adjacent upright columns 12, and the other group of magnets 2 is arranged between the other two adjacent upright columns 12.
Preferably, as shown in fig. 2 and 3, in the present embodiment, the conductive elastic pieces 5 are three and distributed around the first through hole 101, and are respectively denoted as a first conductive elastic piece 5a, a second conductive elastic piece 5b and a third conductive elastic piece 5 c; the first conductive elastic sheet 5a is used for connecting with the positive electrode of the power supply, and the first conductive elastic sheet 5a is connected with any one of the two coils 4 through the surface mount technology and the bending part 501 thereof; the second conductive elastic sheet 5b is used for connecting a negative electrode of a power supply, and the second conductive elastic sheet 5b is connected with the other of the two coils 4 through the surface mount technology and the bent part 501 thereof; the third conductive elastic piece 5c has two bending portions 501, and the third conductive elastic piece 5c is connected to the two bending portions 501 of the two coils 4 by surface mount technology. Thus, the two coils 4 are conducted with the power supply through the conductive elastic sheet 5.
Optionally, the first conductive elastic piece 5a and the second conductive elastic piece 5b are disposed on the same side of the first through hole 101, and the third conductive elastic piece 5c is disposed on one side of the first through hole 101, which is far away from the first conductive elastic piece 5a and the second conductive elastic piece 5 b. Therefore, the acting force applied by the conductive elastic sheet 5 to the lens base 3 is uniform, and the focusing precision of the lens base can be improved.
As shown in fig. 1, the voice coil motor provided by the embodiment of the present invention further includes an annular elastic sheet 6, which is disposed on one side of the lens holder 3 away from the conductive elastic sheet 5 and connects the lens holder 3 and the upright post 12. Therefore, the lens base 3 is suspended in the containing position under the combined action of the annular elastic sheet 6 and the conductive elastic sheet 5, and when the electrified coil 4 drives the lens base 3 and the lens to move up and down under the action of Lorentz force, the annular elastic sheet 6 and the conductive elastic sheet 5 generate the effects of stabilizing, buffering and putting the lens in the lens.
Further, the voice coil motor further includes a housing 7, which is disposed on the base 1 and covers the rest of the components, i.e., the mirror base 3, the magnet 2, the coil 4, the conductive elastic sheet 5, the annular elastic sheet 6, and the like, and the housing 7 has a third through hole 701 coaxial with the first through hole 101 and the second through hole 301. Alternatively, the magnet 2 may be provided on the inner side wall of the housing 7.
To sum up, the utility model provides a voice coil motor, which comprises a base 1, a magnet 2, a lens base 3 and a coil 4; the magnet 2 is arranged on the base 1 and participates in defining a containing position; the lens base 3 is connected with the base 1 through a conductive elastic sheet 5 so as to be suspended in the accommodating position; the coils 4 are arranged on the lens base 3 and are in one-to-one correspondence with the magnets 2; the conductive elastic sheet 5 is connected with the coils 4 through a surface mount technology, and all the coils 4 are connected in series. Compared with the prior art, the voice coil motor has the advantages of high production efficiency, low process requirement, high yield, low production cost, excellent performance and the like.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A voice coil motor, comprising:
a base having a first through hole;
the magnets are arranged in multiple groups and distributed around the first through hole so as to participate in defining a containing position;
the lens base is connected with the base through a conductive elastic sheet so as to be suspended in the containing position, and the lens base is provided with a second through hole coaxial with the first through hole; and
the coils are arranged on the microscope base and correspond to the magnets one by one;
the shell is arranged on the base and covers other parts, and the shell is provided with a third through hole which is coaxial with the first through hole and the second through hole;
the conductive elastic sheet is connected with the coils through a surface mounting technology, and all the coils are connected in series.
2. The voice coil motor of claim 1, wherein:
the coil is arranged on the outer side surface of the lens base, the conductive elastic sheet is provided with a bending part extending to the outer side of the coil, and the conductive elastic sheet is connected with the coil through a surface mounting technology to the bending part.
3. The voice coil motor of claim 2, wherein:
the outer side surface of the lens base is provided with bosses with the same number as the coils, and each coil is respectively arranged on the bosses corresponding to the coil in a surrounding manner.
4. The voice coil motor of claim 2, wherein:
the two sets of magnets are arranged on two opposite sides of the first through hole respectively, the accommodating positions are limited between the two sets of magnets, and the two coils are arranged on two opposite outer side surfaces of the lens base respectively and are arranged on the same side with the two sets of magnets respectively.
5. The voice coil motor of claim 4, wherein:
the number of the conductive elastic sheets is three, and the conductive elastic sheets are respectively marked as a first conductive elastic sheet, a second conductive elastic sheet and a third conductive elastic sheet;
the first conductive elastic sheet is used for being connected with the anode of a power supply, and the first conductive elastic sheet is connected with any one of the two coils through a surface mounting technology;
the second conductive elastic sheet is used for being connected with the negative electrode of a power supply, and the second conductive elastic sheet is connected with the other of the two coils through the surface mounting technology;
the third conductive elastic sheet is provided with two bending parts, and the third conductive elastic sheet is respectively connected with the two coils through the surface mounting technology and the two bending parts.
6. The voice coil motor of claim 5, wherein:
the first conductive elastic sheet and the second conductive elastic sheet are arranged on the same side of the first through hole, and the third conductive elastic sheet is arranged on one side, far away from the first conductive elastic sheet and the second conductive elastic sheet, of the first through hole.
7. The voice coil motor of claim 4, wherein:
the base includes base body and locates the upright post body of base body one side surface, first through-hole is located on the base body, establish to a plurality ofly and distribute in around the first through-hole, in order to participate in injecing the appearance position, electrically conductive shell fragment is located base body with connect the two between the mirror seat.
8. The voice coil motor of claim 7, wherein:
the upright columns are arranged in a rectangular shape, any one of the two groups of magnets is arranged between any two adjacent upright columns, and the other group of magnets is arranged between another two adjacent upright columns.
9. The voice coil motor of claim 7, further comprising:
the annular elastic sheet is arranged on one side, away from the conductive elastic sheet, of the mirror base and is connected with the mirror base and the upright post body.
10. The voice coil motor of any one of claims 1 to 9, wherein the magnet is provided on the base or on an inner side wall of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120216816.3U CN214281192U (en) | 2021-01-26 | 2021-01-26 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120216816.3U CN214281192U (en) | 2021-01-26 | 2021-01-26 | Voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214281192U true CN214281192U (en) | 2021-09-24 |
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ID=77768630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120216816.3U Active CN214281192U (en) | 2021-01-26 | 2021-01-26 | Voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214281192U (en) |
-
2021
- 2021-01-26 CN CN202120216816.3U patent/CN214281192U/en active Active
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