KR102183642B1 - Camera Module - Google Patents

Abstract

The camera module according to the present invention includes a first printed circuit board on which an image sensor is mounted; A housing unit disposed above the first printed circuit board; A holder module disposed spaced apart from the inner bottom surface of the housing unit by a predetermined distance, the first coil wound around the outer circumferential surface, and including at least one lens therein; A plate member coupled to the bottom surface of the holder module; A second printed circuit board installed on the upper side of the holder module; A plurality of wire springs having one end connected to the plate member and the other end connected to the second printed circuit board; And a buffer part provided at a connection part between the wire spring and the plate member.

Description

Camera Module

The present invention relates to a camera module.

In the case of a camera module mounted on a small electronic product, the camera module may be frequently impacted during use, and the camera module may slightly shake due to shaking of the user's hand while shooting. In view of this point, in recent years, a camera module having a hand shake preventing means has been disclosed. As an example, in Korean Patent Registration No. 10-0741823 (registered on July 16, 2007), a Gyro sensor IC or an angular velocity sensor is installed inside a device on which a camera module such as a mobile phone is mounted to compensate for hand shake. How to do it is being introduced.

However, when a separate angular velocity detection sensor is provided as described above, since a separate detection sensor must be provided to implement the hand shake prevention function, it causes an increase in manufacturing cost, and is used to configure and install a hand shake prevention device separate from the camera module There is a hassle of having to prepare space.

(Patent Document 1) KR10-0741823 B1

An object of the present invention is to provide a camera module having an optical image stabilizer (OIS) function.

Another object of the present invention is to provide a camera module having an improved buffer structure between wires and soldering portions so that impact resistance can be improved.

The camera module according to the present invention includes a first printed circuit board on which an image sensor is mounted; A housing unit disposed above the first printed circuit board; A holder module disposed spaced apart from the inner bottom surface of the housing unit by a predetermined distance, the first coil wound around the outer circumferential surface, and including at least one lens therein; A plate member coupled to the bottom surface of the holder module; A second printed circuit board installed on the upper side of the holder module; A plurality of wire springs having one end connected to the plate member and the other end connected to the second printed circuit board; And a buffer part provided at a connection part between the wire spring and the plate member.

The buffer unit may be formed to be reciprocally moved around the connection unit.

In addition, the buffer unit may be formed by a slit formed through the plate member and formed through a spring through-hole through which the wire spring is connected to the plate member by a connecting material, and the slit includes the slit of the plate member. It may be configured by penetrating the portion excluding the buffer portion in an arc shape.

In addition, it is possible to further include a buffer hole formed through the space between the spring through-hole and the buffer portion.

In addition, the connection material may be made of a conductive material such as lead.

The housing unit may include: a first housing disposed above the first printed circuit board; A second housing disposed above the first housing and on which the second printed circuit board is installed; First and second permanent magnets interposed between the first and second housings; It is preferable to include; a yoke disposed between the first and second permanent magnets or positioned on inner surfaces of the first and second housings to transmit magnetic force into the holder module.

The yoke may have a central portion facing the holder module protruding.

The second housing and the second printed circuit board may be fixed with double-sided tape.

It may further include a shield can having a through hole at a position corresponding to the connecting portion of the second printed circuit board and the wire spring and the lens module, and installed to surround the housing unit.

The holder module may include an outer blade having a first coil wound on an outer circumferential surface thereof; A bobbin that is elastically supported by an elastic member on the upper side of the outer blade, is disposed to move up and down inside the outer blade, a second coil is wound on an outer circumferential surface thereof, and at least one lens is installed therein; And upper and lower elastic members respectively disposed on the upper and lower sides of the bobbin to elastically support the bobbin with respect to the outer blade, wherein a magnetic force can be invested in the center of the first coil toward the second coil. A space part may be formed so that it may be.

The wire spring may be formed of a metal material, and may be connected to the plate member and the second printed circuit board to be energized.

At least six wire springs are provided, and two polarities for auto-focusing control and four polarity power for OIS driving are supplied to the holder module through connection with the plate member and the second printed circuit board. desirable.

The wire springs are of the same length and are disposed at a corner portion of the holder module by two, so that a total of eight can be provided.

According to the camera module according to the present invention, since the buffer part is provided in the plate member installed under the outer blade, even if a repetitive load occurs, damage of the wire soldering connection part due to the impact of the camera module can be minimized.

In addition, even if soldering is performed more than a reference due to an error of an operator during the assembling process, excess solder permeates the buffer hole formed in a position close to the soldering portion of the wire, thereby preventing camera module failure.

1 is a schematic plan view of a camera module according to an embodiment of the present invention;
2 is an AA cross-sectional view of FIG. 1,
3 and 4 are side views of a camera module according to an embodiment of the present invention,
5 and 6 are plan views showing a pattern of a buffer part of a plate member according to a first embodiment of the present invention, and,
7 and 8 are plan views showing a pattern of a buffer portion of a plate member according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 is a schematic plan view of a camera module according to an embodiment of the present invention, FIG. 2 is an AA cross-sectional view of FIG. 1, and FIGS. 3 and 4 are side views of the camera module according to an embodiment of the present invention, and FIGS. 5 and 5 6 is a plan view showing the pattern of the buffer part of the plate member according to the first embodiment of the present invention, and FIGS. 7 and 8 are plan views showing the pattern of the buffer part of the plate member according to the second embodiment of the present invention. .

As shown in FIG. 2 showing a schematic plan view of FIG. 1 and a schematic side view showing an AA cross section of FIG. 1, the camera module according to the present invention includes a first printed circuit board 10 and a housing unit 20. , A holder module 30, a plate member 40, a second printed circuit board 50, a wire spring 60, and a buffer unit 100 provided on the plate member 40.

In the first printed circuit board 10, the image sensor 11 is mounted approximately in the vicinity of the center, and it is preferable that the first printed circuit board 10 is provided as a PCB board. Components for operation of the image sensor 11 may be disposed on the first printed circuit board 10, or a plurality of terminal portions may be provided to supply power and output information of the image sensor 11. .

The housing unit 20 is disposed above the first printed circuit board 10 and forms a skeleton of the camera module. According to a preferred embodiment of the present invention, the housing unit 20 includes a first housing 21, a second housing 22, a first and second permanent magnets 23 and 24, and a yoke 25. Includes.

The first housing 21 is a base and is disposed on the upper side of the first printed circuit board 10 and is provided to be spaced apart from the image sensor 11 by a predetermined distance. If necessary, a filter member capable of filtering an image incident on the image sensor 11 may be further installed in the first housing 21.

The second housing 22 is disposed above the first housing 21 and is configured to cover the first housing 21. An opening is formed at a corresponding position so that an image can be transmitted to the image sensor 11 in an approximate center of the second housing 22. On the upper side of the second housing 22, a second printed circuit board 50, which will be described later, is adhesively fixed by a fixing member such as double-sided tape or an adhesive, but this is not limited, and depending on the product design, the It is also possible to provide a separate third housing such as a case or a shield can for the second printed circuit board 50 to fix the second printed circuit board 50 to the inner surface thereof with the fixing member. If the third housing is provided, the second printed circuit board 50 may be pressed and supported by the third housing without a separate fixing member.

The first and second permanent magnets 23 and 24 are interposed between the first and second housings 21 and 22 to inject magnetic force into the holder module 30. The first and second permanent magnets 23 and 24 may have the same size. In addition, the first and second permanent magnets 23 and 24 and the yoke 25 may be disposed on the inner surfaces of the first and second housings if possible within the design tolerance range.

On the other hand, if the size of the first and second permanent magnets 23 and 24 increases, the OIS drive increases even with a small current, and if the first and second permanent magnets 23 and 24 have a constant size, In this case, as the current flowing through the first and second coils 31a and 32a disposed at positions corresponding to the first and second permanent magnets 23 and 24 increases, the OIS drive increases. In conclusion, the larger the size of the first and second permanent magnets 23, 24, the better the OIS drive, but it is desirable to design the optimal size within other design tolerances.

The yoke 25 is interposed between the first and second permanent magnets 23 and 24. In addition, the yoke 25 is provided in a protruding shape around the center so that the magnetic force of the first and second permanent magnets 23 and 24 can be invested into the inner space of the holder module 30. Preferably, the width is provided the same as the first and second permanent magnets 23, 24, and the center protrudes to a certain size so that the permanent magnet and the yoke are formed to have an approximately "T" shape. desirable.

The holder module 30 is disposed spaced apart from the inner bottom surface of the housing unit 20 by a predetermined distance, and is composed of an outer blade 31 and a bobbin 32. The holder module 30 may perform a pendulum movement in the front/rear/left/right and diagonal directions while being suspended from the wire spring 60.

Spring members 35 and 36 are provided on the upper and lower sides of the outer blade 31, and are elastically supported by the spring members 35, and are connected to enable the vertical movement of the bobbin 32.

As shown in FIG. 1, the outer blade 31 has a total of four first coils 31a to 31d wound around the outer circumferential surfaces of the four sides, and the central portion of the four sides on which the coils 31a to 31d are wound It is pierced without a coil. The yoke 25 may be disposed at a position corresponding to the opened space, and the yoke 25 may be partially inserted into the space.

The plate member 40 may be fixed to the bottom of the outer blade 31 with a fixing member 33 such as double-sided tape or an adhesive. The outer blade 31 is front, rear, left, right or left as shown in the arrow of FIG. 2 according to the interaction between the magnetic force of the first and second permanent magnets 22, 23 and the first coils 31a to 31d. It is suspended by a plurality of wire springs 60 so as to be movable diagonally, and is spaced apart from the bottom surface of the first housing 21 by a predetermined distance.

In addition, the outer blade 31 may be provided with a plurality of spring through-holes 37 so that the wire spring 60 can pass through and be connected to the plate member 40.

The bobbin 32 is disposed so that the outer blade 31 is movable up and down inside, and at least one lens 34 is installed therein. A second coil 32a is wound on the outer circumferential surface of the bobbin 32, the second coil 32a is the first coils 31a to 31d of the outer blade 31 through the yoke 25 The operation of raising and lowering the bobbin 32 is performed by interaction with the magnetic force invested through the empty space. The larger the size of the yoke 25, the better the AF driving, but this may also vary according to the optimum design value. It is possible to automatically adjust the focus of the image transmitted to the image sensor 11 by the lifting and lowering of the bobbin 32.

The plate member 40 is preferably formed of a metal material capable of energization, and is disposed on the bottom surface of the outer blade 31 as described above, and can supply power to the first and second coils 31a and 32a. So that the wire spring 60 is connected. The connection method can be any method as long as it can be connected by soldering or other conductive material. That is, the connection portion (w') of the plate member 40 is connected to the first and second coils 31a and 32a, respectively, as shown in FIG. 2, and through the wire spring 60 The supplied power is transmitted to the first and second coils 31a and 32a to form an electromagnetic force. The plate member 40 includes a coupling portion 44 coupled to the wire sling 60, a body portion 43 coupled to the outer blade 31, and a first portion 47 extending from the body portion 43 And a second part 48. The coupling portion 44 may be disposed between the first portion 47 and the second portion 48 and may be spaced apart from the first portion 47 and the second portion 48 by the same distance. The plate member 40 extends from a first portion of the outer edge of the coupling portion 44 and a connection portion 45 extending from the second portion of the outer edge of the coupling portion 44, and the end portion thereof with the body portion 43 It may include an extended portion 46 spaced apart.

At this time, in the case of the second coil 32a, it may be directly connected to the plate member 40, and as shown in FIG. 2, first, after being connected to the lower spring 36, the lower spring 36 It is also possible to connect with the plate member 40.

The second printed circuit board 50 is fixed to the upper side of the second housing 22 with a fixing member such as double-sided tape and an adhesive member as described above, and the second printed circuit board 50 is connected to the first printed circuit board 10. Power transmitted through the terminal portion 52 of the printed circuit board 50 is transmitted to the plate member 40 through a wire spring 60. The connection method can be any method as long as it can be connected by soldering or other conductive material.

The second printed circuit board 50 is provided to cover one side wall of the first and second housings 21 and 22, as shown in FIGS. 3 and 4, wherein the first and A window 55 is formed on a surface facing the second permanent magnets 23 and 24 and the yoke 25, so that interference with them may be avoided.

This is a configuration to avoid this, since the first and second permanent magnets 23 and 24 and the yoke 25 are generally directly attached to the shield can 70 to be described later with a fixing means such as epoxy.

Meanwhile, the second printed circuit board 50 may be a flexible printed circuit board (FPCB), a printed circuit board (PCB), or an R-FPCB (Rigid FPCB integrated type), but is not limited thereto, and is electrically connected. Any substrate can be used. In the case of the present invention, the plate member 40 may be formed of a thin metal plate to form the shock absorber 100 for absorbing shock at the connection part w'to which the wire spring 60 is soldered against external impact. .

Both ends of the wire spring 60 are connected to the plate member 40 and the second printed circuit board 50. At this time, one end of the wire spring 60 is connected to the second printed circuit board 50, and the wire spring 60 connected to the second printed circuit board 50, as shown in FIG. By supplying the power supplied through the terminal portion 52 to the plate member 40 side, the first and second coils 31a and 32a are connected to the first and second permanent magnets 23 and 24 To enable interaction.

In addition, the other end of the wire spring 60, as shown in Figure 2, passing through the spring through hole 37 formed in the outer blade 31, a plate member installed on the bottom surface of the outer blade 31 It is connected with (40). At this time, the other end of the wire spring 60 is connected by a pad (not shown) formed on the plate member 40 like the second printed circuit board 50, although not shown, and the pad (not shown) A spring through hole 41 through which the wire spring 60 passes is formed in the center of ). The connection method can be any method as long as it can be connected by soldering or other conductive material. According to this configuration, the outer blade 31 may be suspended from the wire spring 60 and spaced apart from the bottom surface of the first housing 21 by a predetermined distance or more. Then, according to the interaction between the first coil 31a and the first and second permanent magnets 23 and 24, the outer blade 31 performs a pendulum motion, and the outer blade ( It is possible to correct the vibration of 31) by the interaction of the first coil 31a and the first and second permanent magnets 23 and 24. To this end, the wire spring 60 is preferably made of a metal material that has elasticity and can conduct electricity so as to withstand impact.

On the other hand, as the thickness of the wire spring 60 is thinner, the motion for correcting hand shake is improved even with a small current, but this may vary depending on the optimum design value. Preferably, the thickness of the wire spring 60 is several ㎛ to hundreds of ㎛, preferably it is good to have a 1 to 100㎛.

In addition, it is preferable that at least six wire springs 60 are provided, and at least two polarities for auto-focusing control and four polarity power supplies for camera shake correction are supplied to the second printed circuit board 50 ) And the plate member 40 need to be supplied to the holder module 30 through a connection.

According to a preferred embodiment of the present invention, as shown in Figs. 1 and 2, it is good to have a total of 8 provided and balanced, each having two of the same length and arranged at the corners of the holder module 30. .

Meanwhile, as shown in FIG. 2, when a separate third housing such as a shield can 70 is further included, as described above, the second printed circuit board 50 is the first and second permanent Since the magnet 23, 24 and the yoke 25 are fixedly coupled to the shield can 70 with epoxy or the like, in order to avoid this coupling part, a window 55 is formed to form the first and second housings. (21) Cover the side wall of (22).

If the shield can 70 has been deleted, the second printed circuit board 50 is formed of a PCB or the like, and the first and second permanent magnets 23 and 24 and the yoke ( 25) may be attached and fixed, and as described above, the second printed circuit board 50 is composed of a PCB, and a window 55 as described above is provided to the window 55. The first and second permanent magnets 23 and 24 and the yoke 25 may be inserted, and may be additionally reinforced with a shielding tape on the outside.

The shock absorber 100 is formed on the connection part w', which is electrically conductively connected by soldering or Ag bond between the wire spring 60 and the plate member 40, and applies shock and repeated loads to the wire spring 60. So that it can be absorbed.

The buffer unit 100, as shown in Figure 5, is formed near the edge of the plate member 40, the slit 42 formed around the spring through-hole 41 through which the wire spring 60 passes The plate member 40 may be formed to be a connection part, and may be configured to move around the spring through-hole 41 around the buffer part 100 in a direction parallel to the acceleration direction.

In this case, according to the first preferred embodiment of the present invention, the shape of the slit 42 may be configured to have a circular ring shape except for the buffer part 100 as shown in FIG. 5. . In this case, as shown in FIG. 6, a buffer hole 200 may be additionally formed through the spring at a position close to the spring through hole 41. In the case of performing conductive connection such as soldering the wire spring 60 penetrated through the spring through hole 41, when the solder is injected more than the standard and overflows, the excess lead is transferred to the buffer part. It is designed not to flow into the (100) side. That is, if too much lead is inputted by an operator's mistake, lead may flow toward the buffer unit 100. At this time, if the buffer hole 200 formed through the passage is provided, the overflowing lead is again absorbed. Since it flows into the hole 200, it does not flow toward the buffer unit 100 any more. Therefore, the shock absorber 100 can maintain the flexible property of the plate member 40 as it is, so even if an impact occurs on the wire spring 60, the impact is reduced such as the reciprocating movement of the connecting portion w'. It can be absorbed through shape transformation.

Meanwhile, according to a second preferred embodiment of the present invention, as shown in FIG. 7, the shape of the buffer part 100 may be configured to be symmetrical around the spring through hole 41. Even in this case, as shown in FIG. 8, a buffer hole 200 may be formed around the spring through hole 41. The function of the buffer hole 200 is the same.

In addition, the shape of the buffer hole 200 may be configured as an arc, as shown in FIG. 6, or may be configured in a circular shape as shown in FIG. 8, but is not limited thereto, and solder Any shape can be used as long as the conductive connecting member such as such is flowable.

However, the buffer hole 200 needs to be formed between the buffer unit 100 and the spring through hole 41, and if it is formed too large, the strength around the buffer unit 100 decreases, so that the It is preferable to configure it to be smaller than the area of the spring through-hole 41. According to this configuration, it is possible to prevent damage to the connection portion w'of the plate member 40 due to an external impact.

On the other hand, the general assembly sequence is after combining the bobbin 32 and the outer blade 31, and then using a jig, the second housing 22, the plate member 40, the second printed circuit board 50 and the wire spring ( 60) is connected, the bobbin 32 provided with the lens barrel is connected, the first housing 21 is connected, and this is mounted on the first printed circuit board 10. Before connecting the first housing 21, a permanent magnet and yoke combination may be performed first. This assembly sequence can be changed as needed. In other words, it may be possible right from the machine without a jig. In this process, even if a force for inserting and coupling the bobbin 32 provided with the lens barrel is excessively applied and an excessive force is applied to the connection part w', the buffer part 100 may absorb such excessive force. That is, when the shock absorber 100 is pulled in the direction of gravity or shakes left and right due to a load generated on the wire spring 60 near the connection part w'between the wire spring 60 and the plate member 40 The generated load is absorbed as deformation energy according to the reciprocating movement of the connection part w'around the buffer part 100.

Therefore, it is possible to prevent the hassle of performing the connection operation again due to damage to the connection part (w') during the assembly process, or the parts becoming unusable, and it is possible to produce a camera module with more reliability.

Meanwhile, according to a preferred embodiment of the present invention, the second printed circuit board 50 has a through hole at a position corresponding to the holder module 30 around the connection part w of the wire spring 60, and the housing A shield can 70 installed to surround the units 21 and 22 may be further included. In this case, as described above, the second printed circuit board 50 may be attached and fixed to the inner circumferential surface of the shield can 70. Meanwhile, the shield can 70 is not necessarily required and may be omitted depending on the configuration of the housing units 21 and 22.

Meanwhile, as shown in FIG. 2, in order to fix the shield can 70 to the first housing 21, hook units 80 may be provided on four or at least one or more surfaces. The location may be within the range allowed by the center or edge design, and the number may be provided as one or more.

The hook unit 80 may include a hook 81 protruding from the first housing 21 and a hook hole 82 formed through the shield can 70 facing the hook 81, and If necessary, the reverse can also be configured.

Embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

10; A first printed circuit board 20; Housing unit
21; First housing 22; Second housing
23; First permanent magnet 24; 2nd permanent magnet
25; York 30; Holder module
31; Outer blade 31a; 1st coil
32; Bobbin 32a; 2nd coil
40; Plate member 50; 2nd printed circuit board
52; Terminal 60; Wire spring
70; Shield can 80; Hook unit
100; Buffer unit 200; Buffer hole

Claims (20)

Base;
A second printed circuit board including a first portion disposed on the base and a second portion extending downward from the first portion;
A holder module including an outer blade spaced apart from the base, a bobbin disposed in the outer blade, and a plate member disposed on the outer blade;
A second coil disposed on the bobbin;
A permanent magnet for moving the bobbin through interaction with the second coil;
A first coil for moving the holder module through interaction with the permanent magnet; And
A wire electrically connecting the second printed circuit board and the holder module,
The plate member includes a coupling portion coupled to the wire, a body portion coupled to the outer blade, and a first portion and a second portion extending from the body portion,
The image stabilization device is disposed between the coupling portion and the first portion and the second portion. The method of claim 1,
The image stabilization device is spaced apart from the first portion and the second portion of the coupling portion of the plate member. The method of claim 1,
The image stabilization device that the coupling portion of the plate member is spaced apart from the first portion and the second portion by the same distance. The method of claim 1,
Each of the first portion and the second portion of the plate member includes a first surface facing the coupling portion,
The first surface of the first part is symmetrical with the first surface of the second part with respect to the coupling part. The method of claim 1,
The plate member includes a connection portion connecting the coupling portion and the body portion,
The coupling portion includes a circular hole through which the wire passes,
An image stabilization device in which an outer edge of the coupling portion has a circular shape concentric with the circular hole at least in part. The method of claim 5,
The camera shake correction device extending from the coupling portion to the body portion to a width smaller than the diameter of the coupling portion. The method of claim 5,
The connection portion extends from a first portion of the outer edge of the coupling portion,
The plate member includes an extension portion extending from the second portion of the outer edge of the coupling portion and spaced apart from the body portion. The method of claim 7,
The connection portion extends in a first direction and the extension portion extends in a second direction opposite to the first direction,
The width of the extension portion of the plate member corresponds to a width of at least a portion of the connection portion of the plate member. The method of claim 5,
The wire passes through the hole of the coupling portion of the plate member and is connected to the coupling portion of the plate member by a first solder,
At least a part of the plate member is fixed to the outer blade through an adhesive. The method of claim 1,
The plate member is formed of a conductive metal material and is electrically connected to the wire to supply power to the second coil. The method of claim 1,
The second coil is a camera shake correction device that is directly connected to the plate member. The method of claim 1,
The camera shake correction device is disposed at a position corresponding to the corner of the outer blade and the coupling portion of the plate member. The method of claim 1,
A lower spring connecting a lower portion of the bobbin and a lower portion of the outer blade;
A shield can including a top plate and a side plate extending from the top plate, and accommodating the holder module therein; And
An image stabilization device comprising a second solder coupling the first portion of the second printed circuit board and the wire. A first printed circuit board;
An image sensor disposed on the first printed circuit board;
The image stabilization device of any one of claims 1 to 13 disposed on the first printed circuit board; And
A camera module including a lens coupled to the bobbin of the image stabilization device. A mobile phone comprising the camera module of claim 14. Base;
A second printed circuit board including a first portion disposed on the base and a second portion extending downward from the first portion;
A holder module including an outer blade spaced apart from the base, a bobbin disposed in the outer blade, and a plate member disposed on the outer blade;
A second coil disposed on the bobbin;
A permanent magnet for moving the bobbin through interaction with the second coil;
A first coil for moving the holder module through interaction with the permanent magnet; And
A wire electrically connecting the second printed circuit board and the holder module,
The plate member includes a coupling portion coupled to the wire, a body portion coupled to the outer blade, and a first portion and a second portion extending from the body portion,
The coupling portion is spaced apart from the first portion and the second portion by the same distance. The method of claim 16,
The first portion of the plate member is disposed on the opposite side of the second portion based on the coupling portion. The method of claim 16,
An image stabilization device wherein a separation distance between the first portion of the plate member and the coupling portion is equal to a separation distance between the second portion and the coupling portion. The method of claim 16,
The plate member includes a connection portion connecting the coupling portion and the body portion,
The coupling portion includes a circular hole through which the wire passes,
An image stabilization device in which an outer edge of the coupling portion has a circular shape concentric with the circular hole at least in part. Base;
A holder module including an outer blade spaced apart from the base and a bobbin disposed in the outer blade;
A second coil disposed on the bobbin;
A permanent magnet for moving the bobbin through interaction with the second coil;
An image stabilization device comprising a first coil for moving the holder module through interaction with the permanent magnet.

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