WO2016033772A1 - Ois coil structure of anti-shake voice coil motor and machining process for ois coil structure - Google Patents

Abstract

An OIS coil structure of an anti-shake voice coil motor and a machining process for the OIS coil structure. The OIS coil structure comprises a bottom plate, a middle plate and coils. Four edges of the middle plate extend out of a coil plate respectively. Two or more groups of coils which are connected to one another are etched on the coil plate, and parts between the two or more groups of coils on the coil plate are bent to allow the two or more groups of coils to overlap. The bottom plate is overlapped on a bottom surface of the middle plate. Leads are etched on a front surface and a back surface of the bottom plate respectively. Under the condition that the coils are relatively large in diameter, the number of groups of the coils etched on the coil plate can be determined according to the number of turns of coils required by OIS drive, the coils which are sequentially overlapped are lower in height and smaller in size, and space occupation of a VCM is reduced greatly.

Description

 OIS coil structure of anti-shake voice coil motor and processing technique thereof Technical field

 The present invention relates to a photographic apparatus, and more particularly to an OIS coil structure of an anti-shake voice coil motor and a processing technique thereof.

Background technique

In the VCM industry, the simple autofocus motor can no longer meet the camera requirements of the mobile phone. The birth of OIS is a big breakthrough in the mobile phone camera anti-shake technology. As shown in Figure 1, the conventional anti-shake voice coil motor includes Flexible circuit board 1', magnet holder 2', lower elastic piece 3', magnet 4', bracket coil 5', bracket 6', upper elastic piece 7', upper cover 8', outer casing 9', alloy copper wire 10', Inductive component 11', FP coil 12', wherein flexible circuit board 1' is an important component in the OIS structure. It is to solve the problem of jitter during photographing, that is, offset correction in the X-axis and Y-axis directions. The ampere force is generated by the action of the energized coil on the flexible circuit board 1' and the magnet 4'. When the initial setting of Ampere is complete, the number of turns of the coil is required. As the VCM becomes smaller and smaller, the space around the coil is smaller. Therefore, all manufacturers are developing, and the number of turns is required in as small a space as possible. In addition, the traditional FP coil assembly, the process assembly process includes the assembly of the flexible circuit board and the fixture, the assembly of the coil and the fixture, the assembly of the coil and the flexible circuit board, the whole process is very complicated and difficult, due to the VCM pair The precision requirement is very high. This multi-process assembly process will inevitably produce errors, and there is a risk of disconnection, resulting in low product yield, and its structural features require a height of about 0.7 to 0.8 mm.

At present, the leading technology in this technology field in Japan, using double-panel etching technology, can etch the traditional copper wire coil on the circuit board, the diameter of the coil can be as small as 0.017mm, the minimum gap is 0.017mm, compared with the traditional copper wire coil. Compared with the OIS, a large space is reserved in the design space, and the assembly process is also more accurate and economical. Due to insufficient capacity, it is high in price, and not all VCM merchants can accept the cost pressure brought by it. It is difficult to break this limit in the domestic etching process technology (the current circuit board etching technology in China is coil diameter 0.03mm, gap 0.03mm), so the industry urgently needs to solve the problem that the coil diameter is thick and the required amperage is generated. To reduce the problem of space occupied by VCM (OIS).

Summary of the invention

It is an object of the present invention to provide an OIS coil structure of a small size anti-shake voice coil motor.

Another object of the present invention is to provide an OIS coil processing process for an anti-shake voice coil motor having a simple manufacturing process.

To achieve the above object, the technical solution of the present invention is:

The invention relates to an OIS coil structure of an anti-shake voice coil motor, which comprises a bottom plate, a middle plate and a coil; the middle plate has a through hole in a middle portion thereof, and the four sides of the middle plate respectively extend outward from the coil plate on the coil plate Etching two or more sets of interconnected coils, bending between the coil plates, two or more sets of coils to make two or more sets of coils overlap; the bottom plate is superposed on the middle plate The bottom surface is etched with a wire, and the two ends of the wire are electrically connected to another set of coils on the coil plate opposite to the set of the middle plate, so that the opposite two sets of coils are connected in series.

The front and back sides of the bottom plate are respectively etched with wires, and the two ends of the front side wires are electrically connected to another set of coils on the coil plate opposite to the middle plate, and the two ends of the wires on the back side are respectively respectively Another set of coils on the coil plate are electrically connected to the other of the two sets on the midplane so that the opposite sets of coils are connected in series.

The set of coils is composed of two coils respectively etched from the front and back sides of the coil plate, and the two coils are electrically connected by copper or tin penetrating through the through holes of the coil plate.

Three sets of interconnected coils are etched on the coil plate, and the three sets of coils are bent and overlapped.

The coil plate is preset with two bending lines, and the two sets of coils on the outer side are bent inward according to the inner bending line so that the middle group of coils overlaps with the innermost coil, and the outermost group of coils are outside. The bend line is bent outward such that the outermost set of coils overlaps the middle set of coils.

The bottom plate and the middle plate are double-sided flexographic plates.

The invention relates to an OIS coil processing technology of an anti-shake voice coil motor, which comprises the following steps: (1) the four sides of the middle plate are punched out to have a coil plate extending outward and having a through hole structure at the center; (2) Presetting the bending line on the coil plate extending outward from the middle plate; (3) etching two or more sets of coils on the coil plate extending outward from the middle plate, and each group of coils is defined by a bending line; (4) Folding according to the bending line, the coils are sequentially stacked together; (5) the bottom plate is bonded to the middle plate by bonding, so that the oppositely disposed coils on the middle plate are electrically connected.

Further, in the step (3), two coils are respectively etched on the front and back sides of the coil plate, and the two coils are electrically connected by copper or tin penetrating through the through holes of the coil plate, and the two coils constitute a group of coils.

After adopting the above scheme, the present invention etches two or more sets of interconnected coils on the coil plate of the middle plate, and bends between the coil plates, two groups or two or more coils to make two or two sets. The coils above the group overlap, because the coil diameter is relatively thick in the present invention, the number of coils on the coil plate can be determined according to the number of coil turns required for OIS driving, and the coils which are sequentially superposed are lower in height and smaller in volume. The space occupied by the VCM (OIS) is greatly reduced, and the structural feature is about 0.25 mm in height, which saves a lot of space for the height dimension. At the same time, the production and production process of the structure of the present invention is simplified, and the price is much lower than that of Japanese products, and it can obtain more competitiveness in the market.

The invention will now be further described with reference to the drawings and specific embodiments.

DRAWINGS

1 is an exploded view of a wheel body of a conventional anti-shake voice coil motor;

Figure 2 is an assembled view of the present invention;

Figure 3 is an exploded perspective view of the present invention;

Figure 4 is a front elevational view of the panel of the present invention;

Figure 5 is a rear elevational view of the panel of the present invention;

Figure 6 is a front elevational view of the bottom plate of the present invention;

Figure 7 is a rear elevational view of the bottom plate of the present invention;

Figure 8 is a schematic view showing the first step of the manufacturing process of the board in the present invention;

Figure 9 is a schematic view showing the second step of the board making process of the present invention;

Figure 10 is a schematic view showing the third step of the board manufacturing process of the present invention.

detailed description

First, the structure

As shown in FIGS. 2 and 3, the present invention is an OIS coil structure of an anti-shake voice coil motor, which includes a bottom plate 1, a middle plate 2, and a coil 3.

As shown in FIG. 8 in conjunction with FIG. 4 and FIG. 5, the middle plate 2 has a rectangular shape, and the middle portion has a through hole 21, and the four sides of the middle plate respectively extend outward from the coil plate 22, and three sets of mutual are etched on the coil plate 22. The connected coils 3 are bent between the coil plates 22 and the three sets of coils 3 such that the three sets of coils 3 overlap. The specific folding manner is as follows: two bending lines 221 and 222 are preset on the coil plate 22, and the two sets of coils 3 located on the outer side are bent inward by the bending line 221 on the inner side so that the coil 3 of the middle group overlaps with the innermost coil 3. (As shown in FIG. 9), the outermost set of coils 3 are bent outwardly by the outer bend line 222 such that the outermost set of coils 3 overlap the middle set of coils 3. The set of coils 3 is composed of two coils 31, 32 respectively etched from the front and back sides of the coil plate 22, and the two coils 31, 32 are electrically connected by copper or tin penetrating through the through holes of the coil plate. As shown in FIG. 4, the winding manner of the specific three sets of coils 311, 312, and 313 is such that the coil 311 is wound from the front A1 to the A2, the A2 is connected to the back A3 of the coil 311, and the A3 is wound to the coil 312. A4, A5 of the front side of the A4 communication coil 312 is wound around A6 on the front side of the coil 313, A6 is connected to A7 on the back side of the coil 313, and A7 is wound up to the end of A8. The winding manner on the other coil plates 22 is the same as that, and will not be described again. A1, A15, B1, and B15 in Fig. 4 are respectively soldered to the corresponding positions A1, A15, B1, and B15 on the bottom plate 1 through copper or tin in the through hole of the plate (as shown in Fig. 7), thereby achieving electrical connection, and then connecting correspondingly. Pin feet.

As shown in FIG. 3, FIG. 5, FIG. 6, and FIG. 7, the bottom plate 1 is superposed on the bottom surface of the middle plate 2, and A8, A9, B8, B9 of the middle plate 2 in FIG. 5 and the bottom plate 1 in FIG. The corresponding positions A8, A9, B8, and B9 are welded to realize electrical conduction between the bottom plate 1 and the middle plate 2. The bottom plate 1 is respectively etched with wires 11, 12, and the two ends of the wire 11 are respectively opposite to the upper plate of the middle plate 2. The other set of coils 3 on the coil plate 22 are electrically connected, that is, the A8 and A9 shown in FIG. 5 are connected, and the two ends of the wire 12 are respectively opposite to the other group on the middle plate 2, and the other one on the coil plate 22 is provided. The group coil 3 is electrically connected, that is, B8 and B9 shown in Fig. 5 are connected such that the opposite two sets of coils 3 are connected in series.

The bottom plate 1 and the middle plate 2 are double-sided flexographic plates.

Second, the process

The invention relates to an OIS coil processing technology of an anti-shake voice coil motor, which comprises the following steps:

(1) As shown in FIG. 8, the four sides of the intermediate plate 2 are punched out to have a structure in which the coil plate 22 extends outward and has a through hole 21 in the center;

(2) Presetting the bending lines 221, 222 on the coil plate 22 extending outward from the intermediate plate 2;

(3) As shown in FIG. 4, three sets of coils 3 are etched on the coil plate 22 extending outward from the intermediate plate 2, and the three sets of coils 3 are defined by the bending lines 221, 222;

(4) As shown in FIG. 8 and FIG. 4, the two sets of coils 3 located on the outer side are bent inward by the bending line 221 on the inner side by the bending lines 221 and 222, so that the middle group of the coil 3 and the innermost coil 3 are bent inward. Overlap (as shown in Figure 9), the outermost set of coils 3 are bent outwardly according to the outer bend line 222 such that the outermost set of coils 3 overlap with the middle set of coils 3 such that the coils 3 are sequentially superposed Together (as shown in Figure 10);

(5) As shown in Fig. 3, the bottom plate 1 is bonded to the intermediate plate 2 by bonding, so that the coils 3 provided on the intermediate plate 2 are electrically connected.

It should be noted that, in this embodiment, only two folds and three sets of coil plates are taken as an example, and the structure of the present invention can also be designed as a fold, two sets of coils, or three folds, four sets of coils, etc., because the structure is similar, Let me repeat.

The focus of the invention is that the coil is etched on the foldable midplane.

The above description is only a preferred embodiment of the present invention, and the number of coil groups and the number of folds of the coil plate can be determined as needed, and thus the scope of the present invention cannot be limited thereto, that is, the scope of the patent application and the contents of the specification are Equivalent changes and modifications made should remain within the scope of the invention.

Claims (8)

An OIS coil structure for an anti-shake voice coil motor, characterized in that it comprises a bottom plate, a middle plate and a coil; the middle plate has a through hole in the middle thereof, and the four sides of the middle plate respectively extend outward from the coil plate, online Two or more sets of interconnected coils are etched on the ring plate, and are bent between the coil plates, two or more sets of coils, so that two or more sets of coils overlap; the bottom plate overlaps On the bottom surface of the middle plate, the bottom plate is etched with wires, and the two ends of the wires are electrically connected to another set of coils on the coil plate opposite to the set of the middle plate, so that the opposite two sets of coils are connected in series.

2 . The OIS coil structure of the anti-shake voice coil motor according to claim 1 , wherein the front and the back sides of the bottom plate are respectively etched with wires, and the two ends of the front side wires are respectively connected to the middle plate. A set of coils on the coil plate are electrically connected to each other, and two ends of the wires on the back side are respectively electrically connected with another set of coils on the coil plate opposite to the other group on the middle plate, so that the opposite two groups The coils are connected in series.

3. The OIS coil structure of an anti-shake voice coil motor according to claim 1, wherein said one set of coils is composed of two coils respectively etched from a front side and a back side of the coil board, and the two coils pass A copper or tin conductive connection through the through hole of the coil plate.

4. The OIS coil structure of the anti-shake voice coil motor according to claim 1, wherein three sets of mutually connected coils are etched on the coil plate, and the three sets of coils are bent and overlapped.

The OIS coil structure of the anti-shake voice coil motor according to claim 3, wherein the coil plate is preset with two bending lines, and the two sets of coils on the outer side are bent inward by the bending line on the inner side. The middle set of coils is overlapped with the innermost coil, and the outermost set of coils are bent outwardly according to the outer bend line such that the outermost set of coils overlaps the middle set of coils.

6. The OIS coil structure of an anti-shake voice coil motor according to claim 1, wherein said bottom plate and said intermediate plate are double-sided flexographic plates.

7. An OIS coil processing process for an anti-shake voice coil motor, characterized in that it comprises the following steps: (1) the four sides of the intermediate plate are punched out to have a coil plate extending outwardly and having a through hole structure at the center; 2) Predetermining the bending line on the coil plate extending outward from the middle plate; (3) etching two or more sets of coils on the coil plate extending outward from the middle plate, and each group of coils is defined by a bending line; (4) Folding according to the bending line, so that the coils are sequentially stacked together; (5) bonding the bottom plate to the middle plate by bonding, so that the oppositely disposed coils on the middle plate are electrically connected.

8. The OIS coil processing process of the anti-shake voice coil motor according to claim 7, wherein in the step (3), two coils are respectively etched on the front and back sides of the coil plate, and the two coils pass through The copper or tin conductively connected through the through hole of the coil plate is electrically connected, and the current directions are the same after the bending.