CN106066526A - Lens driving device - Google Patents

Abstract

The invention provides a lens driving device, comprising: a housing, a base, at least one magnet, an auto-focus device, an optical image stabilization device, and at least two strings; wherein, the optical image stabilizing device comprises a moving platform and a plurality of coils; the coils and the magnets are mutually associated in an operating mode so as to push the moving platform to do translational motion on a plane perpendicular to the optical axis; the automatic focusing device comprises an AF fixing bracket, an AF coil and a lens bracket; the AF fixing support is fixed on the moving platform and moves along with the moving platform; the coil and the magnet are operatively associated with each other to urge the lens holder to move along the optical axis. The lens driving device of the invention not only has compact structure, but also has good AF and OIS functions by perfectly combining the automatic focusing device and the optical image stabilizing driving device.

Description

lens drive

technical field

The invention belongs to a lens driving device, in particular to a lens driving device used in a miniature camera module in a portable electronic device.

Background technique

Small camera modules have been widely used in many types of portable electronic devices, such as smart phones. Many advanced camera functions, such as autofocus, are integrated into small camera modules. Recently, the market requires camera modules to be equipped with optical image stabilization, which in turn requires a lens drive device that can move the imaging lens along the X, Y, and Z directions.

How to effectively combine the automatic focusing function and the optical image stabilization function in the miniature camera module, the present invention solves this problem.

Contents of the invention

The object of the present invention is to disclose a lens driving device with compact structure and thinner thickness, which has both autofocus (AF) function and optical image stabilization (OIS) function.

The present invention provides a lens driving device, which includes: a housing, a base, at least one magnet, an autofocus device, an optical image stabilization device, and at least two strings; wherein,

wherein the at least one magnet is fixed on the base;

Wherein the optical image stabilization device further includes a moving platform, and a plurality of coils; wherein the plurality of coils are fixed on the moving platform and are operatively associated with the at least one magnet to promote the moving The platform performs translational movement on a plane perpendicular to the optical axis;

One end of the at least two strings is fixed on the mobile platform of the optical image stabilization device, and the other end is fixed on the base;

Wherein the autofocus device also includes an AF fixing bracket, a coil, a lens bracket, and two shrapnels; wherein the AF fixing bracket is firmly fixed on the moving platform of the optical image stabilization device, and follows the mobile platforms move together;

The coil of the auto-focus device is firmly installed on the lens bracket of the auto-focus device; the moving end of one of the two shrapnels of the auto-focus device is fixed on the auto-focus device The upper end surface of the lens bracket of the focusing device or a position close to the upper end surface, and the fixed end is fixed on the AF fixing bracket; and the moving end of the other shrapnel is fixed on the lens bracket of the automatic focusing The lower end face or a position close to the lower end face, and the fixed end is fixed on the AF fixing bracket; wherein the coil and the magnet of the auto focus device are operatively associated with each other to push the auto focus device The lens holder moves along the optical axis.

In the present invention, the magnet is fixed on the base. In some embodiments, only one magnet is used. In some embodiments, the autofocus device and the optical image stabilization device share at least one magnet. In other embodiments, the magnet of the autofocus device and the magnet of the optical image stabilization device are separate.

In some embodiments, the string is a conductor solid structure, or a conductor hollow structure, or an insulator solid structure, or an insulator hollow structure, or a structure composed of a conductor inside and an insulator outside, or an insulator inside and a conductor outside. A structure, or a structure composed of a conductor inside and a conductor outside, or a multi-clad structure formed by combining multiple conductors and multiple insulators.

In some embodiments, the strings may be made of conductive or non-conductive materials, including but not limited to metals, various non-metals, plastics, organic fibers, polymeric materials, and mixtures of the foregoing.

In some embodiments, one end of the string is fixed on the moving platform of the optical image stabilization device, and the other end is fixed on the base. In some embodiments, one end of the string is fixed on the AF fixing bracket of the auto focus device, and the AF fixing bracket of the auto focus device is fixed on the optical image stabilization device on the mobile platform.

In some embodiments, the AF fixing bracket of the automatic focusing device and the moving platform of the optical image stabilization device are combined into one, that is, the moving end of one of the shrapnel is fixed on the moving platform of the automatic focusing device. The upper end surface of the lens bracket or a position close to the upper end surface, while the fixed end is fixed on the moving platform of the optical image stabilization device; the moving end of the other shrapnel is fixed on the said automatic focusing device. The lower end surface of the lens holder is at or near the lower end surface, and the fixed end is fixed on the moving platform of the optical image stabilization device.

In some embodiments, the shrapnel of the auto-focus device is an independent whole shrapnel, or a shrapnel system composed of several small shrapnels.

In some embodiments, pillars or ledges are provided on the fixed bracket of the autofocus device or on the moving platform of the optical image stabilization device; vias.

In some embodiments, on the fixed bracket of the autofocus device or the mobile platform of the optical image stabilization device, there is a circuit formed by pasting conductors, and the circuit is connected to the coil, the string , and electrodes.

In some embodiments, it also includes at least one printed circuit board, which is fixed on the fixed bracket of the autofocus device or on the moving platform of the optical image stabilization device to connect the coil, the Strings, and electrodes.

The lens driving device of the present invention perfectly combines the autofocus device and the optical image stabilization driving device, which not only makes the lens driving device compact in structure, but also has good AF and OIS functions.

Description of drawings

Fig. 1 (a) and Fig. 1 (b) are a schematic diagram of a basic concept of the present invention;

Figure 2 (a) is a schematic diagram of an embodiment of the external structure of the lens driving device of the present invention;

Fig. 2(b) is a structural schematic diagram of the base and the magnet combination structure of the lens driving device shown in Fig. 2(a);

Fig. 2(c) is a separate schematic diagram of the magnet of the lens driving device shown in Fig. 2(a);

Figure 2(d) is a sectional view of the lens driving device shown in Figure 2(a);

Fig. 3 (a) is the overall plan view of the appearance of the string;

Fig. 3 (b), 3 (c), 3 (d), 3 (e), 3 (f) and 3 (g) are the sectional views cut along the dotted line in Fig. 3 (a) respectively;

Fig. 4 (a) is a separate structural schematic diagram of the lens holder complex of the lens driving device shown in Fig. 2 (a);

Figure 4(b) is an exploded schematic view of the lens holder complex shown in Figure 4(a);

Fig. 5 (a) to Fig. 5 (d) are the structural representations of four embodiments of shrapnel;

Fig. 6 (a) shows the structural representation of other embodiments of the AF lower fixed bracket and the mobile platform of the lens driving device shown in Fig. 2 (a);

Figure 6(b) is a cross-sectional view of the lens holder complex of the lens driving device described in Figure 6(a);

Fig. 7 (a) shows the structural representation of other embodiments of the fixed bracket on the AF of the lens driving device shown in Fig. 2 (a);

Figure 7(b) is a top view of the fixed bracket on the AF of the lens driving device described in Figure 7(a);

Figure 8(a) is a schematic structural view of other embodiments of the base of the lens driving device shown in Figure 2(a);

FIG. 8(b) is a three-dimensional exploded view of the base of the lens driving device described in FIG. 8(a);

FIG. 8(c) is a schematic diagram of the separate structure of the PCB board of the base of the lens driving device described in FIG. 8(a);

FIG. 9 is a schematic structural diagram of another embodiment of the OIS mobile bracket of the lens driving device shown in FIG. 2( a ).

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of claimed subject matter. It will be understood, however, by those skilled in the art that claimed subject matter may be practiced without these specific details. In addition, it is obvious that the following descriptions are only some embodiments of the present invention, and those skilled in the art can obtain other embodiments based on these embodiments without creative efforts. In addition, methods, devices, or systems that would be known by one of ordinary skill have not been described in detail so as not to obscure claimed subject matter.

Reference in the specification to "one embodiment" or "an embodiment" may mean that a particular feature, structure, or characteristic described in connection with a particular embodiment can be included in at least one embodiment of the claimed subject matter. Thus, appearances of the words "in one embodiment" or "an embodiment" in various places in this specification are not intended to refer to the same embodiment or any one specific embodiment described. Furthermore, it should be understood that the particular features, structures or characteristics described may be combined in various ways in one or more embodiments. In general, of course, these and other issues will vary with the specific context of the application. Thus, the specific context in which these terms are described or applied can provide useful guidance regarding inferences from that context.

Similarly, the terms "and", "and/or", and "or" as used herein can include various meanings that depend at least in part on the context in which these terms are used. Typically, "or", and "and/or" if used in connection with a list, such as A, B, or C, means A, B, and C when used in an inclusive sense, and A, B when used in an exclusive sense or C. In addition, the term "one or more" as used herein is used to describe any feature, structure or characteristic alone or to describe some combination of features, structures or characteristics. However, it should be noted that this is merely an illustrative example, and claimed subject matter is not limited to this example.

In the description of this specification, it should be understood that the terms "front", "rear", "upper", "lower", "upper end", "lower end", "upper part", "lower part" etc. indicate orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention. Thus, "upper" and "lower" may be equivalently replaced with "top" and "bottom", "first" and "second", "left" and "right", etc. In the specification, the direction of the optical axis is taken as the Z-axis, and the plane perpendicular to the Z-axis is used as the plane determined by the X-axis and the Y-axis to establish a rectangular coordinate system.

It should be understood that in the description and claims herein, when an element is "connected to" or "connected to" another element, this does not necessarily mean that the one element is fastened, secured, or otherwise connected. Connected to

Another element. In contrast, the word "connected" means that one element is directly or indirectly connected to another element, or that it communicates with another element mechanically or electrically.

It should be understood that protection is not limited to the preferred embodiments described above, and it goes without saying that various modifications or changes can be made without departing from the scope of protection defined here.

Fig. 1(a) and Fig. 1(b) are schematic diagrams of a basic concept of the present invention. A lens driving device 100 provided by the present invention includes: a housing 1, a base 4, at least one magnet 5, an autofocus device 101, an optical image stabilization device 102, and at least two strings 3; wherein,

The at least one magnet 3 is fixed on the base 4;

Wherein said optical image stabilization device 102 (as shown in Fig. 2 (b)) comprises: a mobile platform 27, and a plurality of OIS coils 28; Wherein said a plurality of OIS coils 28 are fixed on the described mobile platform 27, and It is operatively associated with the at least one magnet 5 to push the mobile platform 27 to perform a translational movement on a plane perpendicular to the optical axis; one end of the at least two strings 3 is fixed on the optical image stabilization device 102 on the mobile platform 27, and the other end is fixed on the base 4 (Fig. 1a) or the top of the housing 1 (that is, the part of the housing 1 relative to the base 4) (Fig. 1b);

The autofocus device 101 (as shown in Figure 2(b)) includes: an AF fixing bracket, an AF coil 22, a lens bracket 21, and two shrapnels 25, 26; wherein the AF fixing bracket is firmly fixed on the mobile platform 27 of the optical image stabilization device 102, and move together with the mobile platform 27; wherein the AF coil 22 of the automatic focus device 101 is firmly installed on the automatic focus device. On the lens bracket 21; each of the elastic pieces 25, 26 is provided with a fixed end 252 and a moving end 251, wherein the moving end 251 of one elastic piece 25 is fixed on or close to the upper end surface of the lens bracket 21 of the autofocus device The position of the upper end surface, while the fixed end 252 is fixed on the moving platform 27 of the optical image stabilization device; the moving end 251 of the other shrapnel 26 is fixed on the lower end surface of the lens holder 21 of the autofocus device or a position close to the lower end surface, and the fixed end 252 is fixed on the moving platform 27 of the optical image stabilization device; wherein the AF coil 22 of the autofocus device and the magnet 5 are operatively associated with each other , so as to push the lens holder 21 of the autofocus device to move along the optical axis.

Compared with Fig. 1(a), the magnet in Fig. 1(b) is separated up and down. That is, the OIS magnet and the AF magnet are separate, not the same magnet.

FIG. 2( a ) to FIG. 2( d ) are a present embodiment of the lens driving device of the present invention. In this embodiment, the lens driving device 100 includes a housing 1 , an autofocus device 101 , an optical image stabilization device 102 , several strings 3 , several magnets 5 , and a base 4 .

In the embodiment shown in FIG. 2( c ), the magnets 5 are fixed on the base 4 . In some embodiments, several magnets 5 can be a whole magnet (as shown in FIG. 1( a ) and FIG. 2( b )), that is, the magnet is a “mouth”-shaped structure. Needless to say, whether it is several or one magnet, it does not depart from the scope of protection defined herein.

FIG. 2( d ) is a cross-sectional view of this embodiment, in which it can be seen that the AF fixing bracket of the autofocus device is fixed on the moving platform 27 of the optical image stabilization device 102 . It can also be seen in FIG. 2( d ) that an integral magnet 5 is provided on the left and right sides of the lens driving device, and the bottom of the integral magnet 5 is directly connected to the base 4 .

The AF coil 22 of the autofocus device and the upper half of the left and right magnets 5 are operatively associated with each other to push the autofocus lens holder 21 to move along the optical axis. The OIS coil 28 of the optical image stabilization device and the lower half of the magnet 5 are operatively associated with each other to push the moving platform 27 of the optical image stabilization device on a plane perpendicular to the optical axis Perform translational movement, thereby driving the entire autofocus device 101 and image stabilization device complex 2 to perform translational movement on a plane perpendicular to the optical axis.

Compared with Fig. 1(a) and Fig. 1(b), the autofocus device and the optical image stabilization device in Fig. 2(a) to Fig. 2(d) share the same magnet 5 . That is, the same magnet is used both as a magnet for the autofocus unit and as a magnet for the optical image stabilization unit. Those skilled in the art can easily imagine the situation of two magnets 51 and 52 separated up and down by one magnet in the embodiment of Fig. 2(a) to Fig. 2(d) (Fig. 1(b)). Needless to say, whether it is the case of one magnet (as shown in Figure 2 (a) to Figure (d)) or the situation of two separate magnets 51, 52 (as shown in Figure 1 (b))), it does not break away from scope of protection as defined herein.

In addition, in FIG. 2( c ) and FIG. 2( b ), it can be seen that the upper ends of the four strings 3 are fixed on the moving platform 27 of the optical image stabilization device, while the lower ends are fixed on the base 4 . The method used for fixing may be methods such as glue, adhesive, molten plastic, or welding. Although in Figure 2(b), four strings are shown, this is only a symmetrical distribution method. Needless to say, the use of 2, 3, or more strings in the embodiments does not depart from the scope of protection defined herein. The structure of the string 3 can be a solid structure, a hollow structure, and a multi-clad structure. Fig. 3 (a) to Fig. 3 (g) show some embodiments of chord, Fig. 3 (a) is the overall appearance plan view of a chord, and Fig. 3 (b), Fig. 3 (c), Fig. 3 (d ), Fig. 3(e), Fig. 3(f), and Fig. 3(g) are sectional views cut along the dotted line in Fig. 3(a).

Figure 3(b) represents the solid string. The material can be a conductor or an insulator; the solid string is made of metal, or non-metal, or plastic, or organic fiber, or polymeric material, or a mixture of the aforementioned various materials, etc.

Figure 3(d) can be regarded as a hollow string. The material can also be a conductor or an insulator; the hollow string is made of metal, or non-metal, or plastic, or organic fiber, or polymer material, and a mixture of the aforementioned various materials.

Figure 3(c), Figure 3(d), Figure 3(e), Figure 3(f), and Figure 3(g) are multi-clad structures. This kind of structure has at least one layer, or even two, three, Four layers of outer cladding. The innermost one can be solid or hollow.

Figure 3(c) is a structure composed of conductors inside and insulators outside, such as enameled wires.

Figure 3(e) is a structure in which the interior is composed of conductors and the exterior is also composed of conductors, such as aluminum-clad copper wires.

Figure 3(f) and Figure 3(g) are schematic diagrams of string structures with more than two layers of outer cladding. From the string core, the middle layer, to the outer cladding, there can be various combinations of conductors and insulators. From the perspective of materials, it is various combinations of metals, non-metals, plastics, organic fibers, polymeric materials, and mixtures of the aforementioned materials.

Also, in this embodiment, although 4 strings are shown, it goes without saying that using 2, 3, or more strings does not depart from the scope of protection defined herein.

Fig. 4(a) and Fig. 4(b) show the structural diagram and exploded view of the assembly complex 2 of the autofocus device and the optical image stabilization device described in Fig. 2(a) to Fig. 2(d). Wherein the autofocus device does not include a magnet, and the optical image stabilization device does not include a magnet.

Briefly, in FIG. 4( b ), the autofocus device includes an AF fixing bracket, at least one AF coil 21 , a lens bracket 22 , and at least two elastic pieces 25 , 26 . Wherein, the AF fixing bracket is used as a base or base of the auto-focus device, and provides mechanical support for the auto-focus device 101 . In this embodiment, the AF fixing bracket is composed of an AF upper fixing bracket 23 and an AF lower fixing bracket 24 . There are four pillars 242 (also called ledges) on the four corners of the AF lower fixing bracket 24 . The AF upper fixing bracket 23 is fixed on the four pillars 242 , and there is a gap with the bottom surface of the AF lower fixing bracket 24 . In some embodiments, the four pillars 242 may also be installed on the four corners of the fixing bracket 23 on the AF. In some other embodiments, the four pillars are installed at any position of the AF upper or lower fixing bracket, as long as the movement of the AF lens bracket is not hindered.

Needless to say, in some embodiments, 2, 3, or more columns are installed. All this without departing from the scope of protection defined herein. In some other embodiments, the AF fixing bracket does not include the AF upper fixing bracket, only the AF lower fixing bracket and the pillars or ledges installed on the lower fixing bracket (or called the AF lower fixing bracket has a pillar or ledge structure). In some other embodiments, the AF fixing bracket does not include the AF upper and lower fixing brackets, and only several columns or protrusions are fixed on the moving platform 27 of the optical image stabilization device.

In this embodiment, the at least one AF coil 22 is fixed on the lens bracket 21 , and the formed coil lens bracket assembly is placed between the upper and lower fixing brackets 23 , 24 of the AF fixing bracket. When the AF coil 22 is energized, the lens holder 21 moves back and forth between the upper and lower fixed holders 23 and 24 (along the optical axis).

Definition of the elastic pieces shown in FIG. 5( a ) to FIG. 5( b ): All the elastic pieces can be divided into three regions: the moving end 251 , the fixed end 252 , and the elastic arm 253 . The moving end 251 is the part where the elastic piece is connected to the lens holder 21 , and is the part that moves back and forth along the optical axis together with the lens holder 21 . The fixed end 252 is the part where the elastic piece is connected to the AF fixing bracket. The elastic arm 252 refers to the part where the elastic sheet deforms and generates elastic force.

In this embodiment, as shown in Figure 4(a) and Figure 4(b), the fixed end of one of the at least two elastic pieces is fixed on the fixed bracket on the AF, while the moving end 251 is fixed on The upper end surface of the lens holder or a part close to the upper end surface; and the fixed end 252 of the other shrapnel is fixed on the fixed bracket 25 under the AF, and the moving end 251 is fixed on the lower end surface of the lens holder or near the lower end surface. part.

As shown in Figures 5(a) to 5(b), one of the at least two shrapnels can be a whole shrapnel as shown in Figure 5b and Figure 5d, or a shrapnel system composed of several small shrapnels Or shrapnel assembly, as shown in Figure 5a and Figure 5c.

In FIG. 4( a ) and FIG. 4( b ), the optical image stabilization device 102 includes a moving platform 27 and several OIS coils 28 . The several OIS coils 28 are all fixed on the mobile platform 27 of the optical image stabilization device. And the AF fixing bracket of the autofocus device is fixed on the mobile platform 27 and moves together with the mobile platform 27 .

In this embodiment, the AF lower fixing bracket 24 of the autofocus device is directly fixed on the moving platform 27 of the optical image stabilization device (as shown in FIG. 4( b )). In some embodiments, the AF lower fixing bracket of the autofocus device and the moving platform of the optical stabilization device are combined into one. That is, the AF upper fixed bracket is directly fixed on the mobile platform 27 (as shown in FIG. 6( b )), and the coil lens bracket assembly is placed between the AF upper fixed bracket and the mobile platform.

Figure 6(a) and Figure 6(b) show that the AF lower fixed bracket 24 and the mobile platform 27 are combined into a combined bracket 31, and the combined bracket 31 not only plays the role of the AF lower fixed bracket, but also plays the role of a mobile bracket. The string 3 is connected between the AF upper fixed bracket 23 and the combined bracket 31 of the autofocus device. The combined bracket 31 includes: an AF lower fixed bracket substrate 311 fixedly connected to the AF upper fixed bracket 23, a center ring 312 extending downward from the center of the AF lower fixed bracket substrate 311 and used for mounting a lens, and a center ring 312 connected to the center ring 312 and four coil fixing plates 313 evenly distributed.

Wherein, the AF coil 22 is fixedly connected between the AF upper fixing bracket 23 and the AF lower fixing bracket substrate 311; four OIS coils 28 are fixed on the corresponding coil fixing plate 313; There are a plurality of pillars 233 or protrusions 233, and the upper surface of the base plate 311 of the AF lower fixed bracket is also provided with a plurality of pillars 314 or protrusions 314. Function, the pillar 314 or the boss 314 of the AF lower fixed bracket base plate 311 are used for the positioning of the lower elastic piece 26 (in the above-mentioned embodiment, the AF lower fixed bracket 24 and the mobile platform 27 are separate devices, and the upper surface of the AF upper fixed bracket 23 There are a plurality of positioning columns for fixing the upper elastic piece 25, and the lower surface of the AF lower fixing bracket 24 is also provided with a plurality of positioning columns for fixing the lower elastic piece 26).

Although the positioning post is only used for positioning the shrapnel, due to the positioning post, there is a gap between the bottom surface of the AF coil 22 of the lens holder 21 and the upper end surface of the AF lower fixing bracket substrate 311 . By changing the position of the positioning pin, such as setting the positioning pin on the peripheral area of the AF coil 22, the overall thickness can be further reduced and made thinner.

When the AF lower fixed bracket and the OIS movable bracket are combined into a combined bracket 31, one end of the upper elastic piece 25 is fixed on the upper surface of the lens mounting ring 211 of the lens bracket 21, and the other end of the upper elastic piece is fixed on the top of the AF upper fixed bracket 23. Surface: One end of the lower elastic piece 26 is fixed on the lower surface of the lens mounting ring 211 of the lens holder 21 , and the other end of the lower elastic piece 26 is fixed on the upper surface of the AF lower fixed bracket substrate 311 .

Of course, all these changes in the position of the pillar or the ledge, the height of the pillar or the ledge, the shape of the pillar or the ledge, etc. do not depart from the scope of protection defined herein.

A through hole 40 is provided at the junction of the AF upper fixing bracket 23 and the AF lower fixing bracket substrate 311 , and the string 3 passes through the through hole 40 to be connected to the AF upper fixing bracket 23 .

The combination bracket 31 is a combination of the AF lower fixed bracket and the OIS movable bracket. The combined bracket 31 makes the structure of the lens driving device more compact, and its thickness is relatively thinner.

In this case, on the fixed bracket 23 on the AF or on the mobile platform 27, a column 233/324 or a boss 233/324 structure will be provided to connect the shrapnel and place the two shrapnel in the direction of the optical axis. separated by a certain distance. In some other embodiments, the AF upper fixing bracket is also omitted. That is, the autofocus device only includes a coil, a lens holder, and several posts. The several columns are directly fixed on the mobile platform. In a broad sense, the AF fixing brackets of the autofocus device (whether it is the upper and lower fixing brackets, the pillar protrusions, etc.) are all part of the moving platform of the optical stabilization device.

As shown in FIG. 6( b ), the pillars on the mobile platform 27 are provided with via holes, and the string 3 can be connected to the fixed bracket on the AF through the via holes. As shown in FIG. 7(a) and FIG. 7(b), in some embodiments, the AF upper and lower fixing brackets 23, 24 may be provided with a conductive circuit 234 for connecting all the autofocus devices. The AF coil 22, the OIS coil 28 of the optical stabilization device, and the string 3 can be electrically connected to each other as required, so that the various coils can finally obtain electric energy. The conductive circuit 234 has various forms. In some embodiments, the conductive circuit is formed by pasting metal sheets, metal wires, and conductive sheets of various shapes on the upper and lower fixing brackets of the AF. In some other embodiments, the conductive circuit is formed by installing metal sheets, metal wires, and conductive sheets in the grooves on the AF upper and lower fixing brackets 23 and 24 . In other embodiments, the conductive circuit is formed by attaching a printed circuit board (PCB) directly to the upper and lower fixing brackets of the AF. Needless to say, conductive circuits can also be provided on the mobile platform of the optical stabilization device in substantially the same manner as described above.

Figure 8(a) to Figure 8(c) show the method for fixing the string 3 to the base 4 in this embodiment. In some embodiments, the string 3 is fixed on the base 4, and the fixing method may be glue, adhesive, molten plastic, or welding. In some other embodiments, a printed circuit board (PCB) is also provided on the base 4, and the circuit of the board can electrically connect the strings to the electrodes. In such an embodiment, the strings are soldered to the circuit board PCB by electrical soldering.

As shown in FIG. 8( a ) to FIG. 8( c ), in other embodiments, a PCB board 6 is installed on the base 4 , and the string 3 is fixed on the PCB board 6 . The PCB board 6 is provided with a connection hole 31 for fixing the string 3 and a welding pad 62 for electrically connecting the electrode pin.

In other embodiments, the mobile platform 27, and/or the AF upper fixed bracket 23, and/or the AF lower fixed bracket 24 are also provided with a PCB board, and the PCB board is provided with a connection hole for fixing the string connection and an electrical connection electrode pin solder pad.

The above situation is also applicable to the situation of the combination bracket 31 shown in Fig. 6 (a) and Fig. 6 (b), that is: the combination bracket 31 is provided with a PCB board, and the PCB board is provided with connection holes and electrical connections for fixing the strings. Soldering pads for electrode pins.

Please refer to FIG. 9, in other embodiments, the OIS mobile bracket includes an OIS coil base 71, a PCB board 72 sleeved on the OIS coil base 71, a plurality of positioning columns 73 and a plurality of spacer columns 74, through The plurality of positioning columns 73 and the plurality of spacing columns 74 are connected to the OIS coil base 71 and the PCB board 72 . The OIS coil 28 is fixed on the OIS coil holder 71 .

The PCB board 72 is provided with a plurality of holes 721 and a plurality of wire slots 722, and the coil leads of the OIS coil 28 pass through the holes 721 and the wire slots 722 to the top of the PCB or from the bottom of the PCB. The hole 721 and the wire groove 722 reach the top of the PCB board.

The lens driving device of the present invention perfectly combines the autofocus device and the optical image stabilization driving device, which not only makes the lens driving device compact in structure, but also has good AF and OIS functions.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. A lens driving device, characterized by comprising: a housing, a base, at least one magnet, an auto-focus device, an optical image stabilization device, and at least two strings; wherein,

wherein the at least one magnet is fixed on the base;

wherein the optical image stabilization device further comprises a moving platform and a plurality of coils; wherein the plurality of coils are fixed on the moving platform and operatively associated with the at least one magnet to urge the moving platform to perform translational motion in a plane perpendicular to the optical axis;

wherein one end of the at least two strings is fixed on the moving platform of the optical image stabilizing device, and the other end is fixed on the base;

the automatic focusing device also comprises an AF fixing support, a coil, a lens support and two elastic sheets; wherein the AF fixing bracket is fixedly fixed on the moving platform of the optical image stabilizing device and moves along with the moving platform;

wherein the coil of the autofocus device is fixedly mounted on the lens mount of the autofocus device; the moving end of one of the two elastic sheets is fixed on the upper end surface of the lens bracket of the automatic focusing device or a position close to the upper end surface, and the fixed end is fixed on the AF fixed bracket; the moving end of the other elastic sheet is fixed on the lower end surface of the lens bracket of the automatic focusing device or a position close to the lower end surface, and the fixed end is fixed on the AF fixing bracket; wherein the coil and the magnet of the auto-focus device are operatively associated with each other to urge the lens holder of the auto-focus device to move along an optical axis.

2. The lens driving device according to claim 1, wherein: the auto-focusing device and the optical image stabilizing device share at least one magnet.

3. The lens driving device according to claim 1, wherein: the chord is a conductor solid structure, a conductor hollow structure, an insulator solid structure, an insulator hollow structure, a structure with the inner part composed of a conductor and the outer part composed of an insulator, a structure with the inner part composed of an insulator and the outer part composed of a conductor, a structure with the inner part composed of a conductor and the outer part also composed of a conductor, or a multi-cladding structure formed by mutually combining various conductors and various insulators.

4. The lens driving device according to claim 1, wherein: the string may be made using conductive or non-conductive materials, including but not limited to metals, various non-metals, plastics, organic fibers, polymeric materials, and mixtures of the foregoing.

5. The lens driving device according to claim 1, wherein: the AF fixing support of the automatic focusing device and the moving platform of the optical image stabilizing device are combined into a whole, namely, the moving end of one elastic sheet is fixed on the upper end surface of the lens support of the automatic focusing device or a position close to the upper end surface, and the fixed end is fixed on the moving platform of the optical image stabilizing device; the moving end of the other elastic sheet is fixed on the lower end surface of the lens bracket of the automatic focusing device or a position close to the lower end surface, and the fixed end is fixed on the moving platform of the optical image stabilizing device.

6. The lens driving device according to claim 1, wherein: the elastic sheet of the automatic focusing device can be an independent elastic sheet whole body or an elastic sheet system formed by combining a plurality of small elastic sheets.

7. The lens driving device according to claim 1, wherein: a pillar or a boss is arranged on the fixed bracket of the automatic focusing device or the movable platform of the optical image stabilizing device; and through holes for the strings to pass through are formed in the columns or the bosses.

8. The lens driving device according to claim 1, wherein: and a circuit formed by adhering conductors is arranged on the fixed support of the automatic focusing device or the movable platform of the optical image stabilizing device and is connected with the coil, the string and the electrode.

9. The lens driving device according to claim 1, wherein: the method is characterized in that: the automatic focusing device further comprises at least one printed circuit board which is fixed on the fixed support of the automatic focusing device or the moving platform of the optical image stabilizing device so as to connect the coil, the string and the electrode.