KR102273899B1 - Camera Module - Google Patents

Abstract

A camera module according to an embodiment of the present invention includes a magnet disposed on a lens module; a bearing member disposed in a ball guide portion formed between a housing accommodating the lens module and the lens module; a coil disposed in the housing and disposed to face the magnet; and a yoke member disposed on the housing and configured to have a magnetic force biased with respect to the magnet.

Description

Camera Module

The present invention relates to a camera module configured to minimize the tilt phenomenon that occurs during the optical axis movement of a lens barrel.

The camera module may be configured to enable focus adjustment. For example, the lens barrel may be moved in the optical axis direction by an actuator so that the focus of the camera module may be adjusted. The movement of the lens barrel is usually guided by a bearing. In more detail, a plurality of ball bearings are disposed between the housing of the camera module and the lens barrel, thereby enabling smooth movement of the lens barrel. However, since this structure causes a phenomenon in which the contact between the ball bearing and the lens barrel is partially separated due to manufacturing tolerances, the lens barrel may be shifted to one side during movement.

For reference, as prior art related to the present invention, there are Patent Documents 1 to 3.

US 2013-0071840 A US 10-1765281 B US 10-1640565 B

An object of the present invention is to solve the above problems, and an object of the present invention is to provide a camera module configured to stably move the lens barrel in the optical axis direction.

A camera module according to an embodiment of the present invention for achieving the above object is a magnet disposed on the lens module; a bearing member disposed in a ball guide portion formed between a housing accommodating the lens module and the lens module; a coil disposed in the housing and disposed to face the magnet; and a yoke member disposed on the housing and configured to have a magnetic force biased with respect to the magnet.

According to the present invention, since the optical axis direction movement of the lens barrel is made stably, it is possible to reduce the quality deterioration of the camera module due to the tilt phenomenon of the lens barrel.

1 is an exploded perspective view of a camera module according to an embodiment of the present invention;
FIG. 2 is a combined perspective view of the camera module shown in FIG. 1 ;
3 is a cross-sectional view II of the camera module shown in FIG.
4 is a cross-sectional view II-II of the camera module shown in FIG.
5 is a block diagram of the yoke member shown in FIG.
6 is a perspective view of a yoke member according to another form;
7 is a perspective view of a yoke member according to another form;
8 is a perspective view of a yoke member according to another form;
9 is a perspective view of a yoke member according to another form;
10 is a perspective view of a yoke member according to another form;
11 is a perspective view of a yoke member according to another form;
12 is a schematic diagram illustrating an attractive force relationship between a magnet and a yoke member;
13 is a schematic diagram showing a contact relationship between a lens barrel and a bearing member;
14 is a combined perspective view of a camera module according to another embodiment of the present invention;
15 is a III-III cross-sectional view of the camera module shown in FIG. 14;
16 is a cross-sectional view IV-IV of the camera module shown in FIG. 15;
17 is a schematic view showing a contact relationship between a lens barrel and a bearing member;

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings.

In describing the present invention below, terms referring to the components of the present invention are named in consideration of the function of each component, and thus should not be construed as limiting the technical components of the present invention.

In addition, throughout the specification, that a component is 'connected' with another component includes not only the case where these components are 'directly connected', but also the case where the component is 'indirectly connected' with another component therebetween. means that In addition, 'including' a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

A camera module according to an embodiment of the present invention will be described with reference to FIG. 1 .

The camera module 100 includes a housing 110 and a lens module 120 . However, the configuration of the camera module 100 is not limited to the housing 110 and the lens module 120 . For example, the camera module 100 may further include a shield can 194 covering a significant portion of the housing 110 . The camera module 100 may include a driving means. For example, the camera module 100 may include driving means for driving the lens module 120 in an optical axis direction or a direction crossing the optical axis direction. The driving means may be composed of a first driving means and a second driving means. The first driving means may be configured to perform a focus adjustment function, and the second driving means may be configured to perform a hand-shake correction function. Each driving means may include a magnet and a coil.

The housing 110 is configured to receive the lens module 120 . For example, a space for accommodating the lens module 120 may be formed long in the optical axis direction in the housing 110 . A driving means may be disposed in the housing 110 . For example, coils 150 , 152 , and 154 for driving means may be disposed on three sides of the housing 110 . The coils 150 , 152 , and 154 may have an elliptical shape elongated in a direction crossing the optical axis. A flexible circuit board 158 may be disposed in the housing 110 . For example, the flexible circuit board 158 may be disposed to surround three sides of the housing 110 as shown in FIG. 1 . The flexible circuit board 158 may be electrically connected to the coils 150 , 152 , and 154 . A coil 150 and a yoke member 160 may be disposed on the flexible circuit board 158 . For example, the coil 150 may be disposed on the front surface of the flexible circuit board 158 , and the yoke member 160 may be disposed on the rear surface of the flexible circuit board 158 .

The coils 150 , 152 , and 154 may be disposed on each side of the flexible circuit board 158 to be electrically connected to the flexible circuit board 158 . The housing 110 may accommodate an image sensor (not shown). For example, a substrate on which an image sensor is mounted may be disposed under the housing 110 .

A space for arranging a plurality of rolling members (eg, bearing members) is formed in the housing 110 and the lens module 120 . For example, a ball guide part 112 elongated in the optical axis direction may be formed on one surface where the housing 110 and the lens module 120 face each other. The ball guide part 112 is formed to enable movement of the lens module 120 in the optical axis direction. For example, the ball guide part 112 may be formed to be elongated in the optical axis direction.

The lens module 120 is configured to include one or more lenses. The lens module 120 may be configured to perform a focus adjustment function. For example, the lens module 120 may freely move in the optical axis direction inside the housing 110 by a bearing member. The lens module 120 may be configured to perform a hand-shake correction function. For example, some members of the lens module 120 may move in a direction crossing the optical axis on the inside of the housing 110 or on other members of the lens module 120 by the bearing member.

The lens module 120 may be composed of a plurality of members. For example, the lens module 120 may include a first frame 122 , a second frame 124 , and a third frame 126 .

The first frame 122 is configured to be accommodated in the housing 110 . The first frame 122 may be moved in the optical axis direction inside the housing 110 . A first guide groove 1222 in which the plurality of first cloud members 182 are accommodated is formed in the first frame 122 . The first guide groove 1222 is elongated in a first direction crossing the optical axis. A portion of the first driving means may be disposed on the first frame 122 . For example, the first magnet 140 may be disposed on the first side of the first frame 122 . The first magnet 140 disposed in this way may be positioned to face the first coil 150 and the yoke member 160 disposed in the housing 110 .

The second frame 124 is configured to be accommodated in the first frame 122 . The second frame 124 may be configured to move in a direction crossing the optical axis. For example, the second frame 124 may be moved in a first direction crossing the optical axis along the first guide groove 1222 . The first rolling member 182 disposed in the first guide groove 1222 may enable smooth movement of the second frame 124 . A space for arranging the second cloud member 184 may be formed in the second frame 124 . For example, a plurality of second guide grooves 1242 may be formed in the second frame 124 . The second guide groove 1242 may be formed in a direction different from that of the first guide groove 1222 . For example, the second guide groove 1242 may be formed to be elongated in a second direction crossing the optical axis.

The third frame 126 is configured to be accommodated in the second frame 124 . The third frame 126 may be configured to move in a direction crossing the optical axis. For example, the third frame 126 may move in a second direction crossing the optical axis direction along the second guide groove 1242 . The second rolling member 184 disposed in the second guide groove 1242 may enable smooth movement of the second frame 124 . Some components of the second driving means may be disposed on the third frame 126 . For example, second magnets 142 and 144 may be disposed on two sides of the third frame 126 , respectively. The second magnets 142 and 144 may be disposed to face the second coils 152 and 154 disposed in the housing 110 through the open space of the first frame 122 , respectively. The second magnets 142 and 144 are disposed so as not to overlap the first magnet 140 . In more detail, the first magnet 140 and the second magnets 142 and 144 are disposed to face different sides of the housing 110 . The third frame 126 may be coupled to the lens barrel 128 . For example, the cylindrical lens barrel 128 may be firmly seated in the upper and lower open spaces of the third frame 126 . The lens barrel 128 is configured to refract light reflected from the subject to the image sensor. For this purpose, the lens barrel 128 may include one or more lenses.

The camera module 100 may include a configuration for moving the lens module 120 in the optical axis direction. For example, the camera module 100 may include first driving means 140 , 150 , and 160 for moving the lens module 120 in the optical axis direction. The first driving means 140 and 160 may move the lens module 120 toward the object or the image sensor through the first magnet 140 and the second coil 150 . The camera module 100 may adjust the focus by moving the lens module 120 in the optical axis direction.

The camera module 100 may further include a configuration for moving the lens module 120 in a direction crossing the optical axis. For example, the camera module 100 may include second driving means 142 , 144 , 152 , and 154 for moving a part of the lens module 120 in a direction crossing the optical axis. The second driving means 142 , 144 , 152 , and 154 may move a part of the lens module 120 in first and second directions crossing the optical axis. For example, the second magnets 142 and 144 and the second coils 152 and 154 move the second frame 124 and the third frame 126 in a first direction crossing the optical axis or the third The frame 126 may be moved in a second direction crossing the optical axis. The camera module 100 may perform a handshake correction function by moving in the first and second directions intersecting the optical axes of the frames 122 , 124 , and 126 .

An internal configuration of the camera module will be described with reference to FIGS. 3 and 4 .

The camera module 100 includes a first driving means for moving the lens module 120 in the optical axis direction as described above. For example, the camera module 100 may include a first magnet 140 , a first coil 150 , and a yoke member 160 as one form of the first driving means. Here, the first magnet 140 may be disposed on the lens module 120 , and the first coil 150 and the yoke member 160 may be disposed on the housing 110 . The first magnet 140 and the first coil 150 are disposed to face each other. Accordingly, the lens module 120 may be moved in the optical axis direction by the magnetic force generated between the first magnet 140 and the first coil 150 .

The camera module 100 includes a friction reducing means (or rolling contact means) for smoothing the movement in the optical axis direction of the lens module 120 . For example, the camera module 100 may include a plurality of bearing members 170 .

The bearing member 170 is disposed on the ball guide part 112 provided between the housing 110 and the lens module 120 . The bearing member 170 is continuously disposed along the optical axis direction as shown in FIG. 3 . The bearing member 170 may have different sizes. For example, the bearing member 170 may include first bearings 172 and 173 having a first size and second bearings 171 and 174 having a second size larger than the first size.

The first bearings 172 and 173 may be disposed between the second bearings 171 and 174 . In more detail, the first bearings 172 and 173 may be disposed between the second bearing 171 and the second bearing 174 . The bearing member 170 configured as described above may minimize contact friction with the lens module 120 while smoothly guiding the movement of the lens module 120 in the optical axis direction.

Next, the yoke member of the camera module according to the present embodiment will be described in detail with reference to FIG. 5 .

The yoke member 160 according to the present embodiment is configured to reduce rattling (tilt phenomenon) that occurs when the lens module 120 moves in the optical axis direction. For example, the yoke member 160 may be configured to generate a magnetic force biased with respect to the first magnet 140 of the lens module 120 so that the lens module 120 can be stably moved. In one form for this, the yoke member 160 may include a protrusion 162 protruding to the first magnet 140 of the lens module 120 . The protrusion 162 may be disposed closer to the first magnet 140 than the yoke member 160 . The protrusion 162 may be formed in a space surrounded by the coil 150 as shown in FIG. 4 . However, the formation position of the protrusion 162 is not limited to the portion shown in FIG. 4 .

The protrusion 162 is formed to be deflected to one side along the long axis direction (X-axis direction) of the coil 150 from the winding center CP of the coil 150 . The separation distance G between the protrusion 162 and the winding center CP may be determined by the protrusion size of the protrusion 162 , the magnetic force size of the first magnet 140 , and the like. For example, when the size of the protrusion is small or the magnetic force of the magnet 140 is weak, the separation distance may be increased. Conversely, when the protrusion size is large or the magnetic force of the magnet 140 is strong, the separation distance may be reduced.

The protrusion 162 may be integrally formed with the yoke member 160 . For example, the protrusion 162 may be a portion formed by bending or pressing a portion of the yoke member 160 . As another example, the protrusion 162 may be formed by a yoke member of a different size added to the yoke member 160 . As another example, the protrusion 162 may be formed on the yoke member 160 through a surface mounting technology (SMT).

The yoke member 160 formed as above may form a magnetic attraction of a magnitude biased with respect to the first magnet 140 . That is, the left region (refer to FIG. 4 ) of the yoke member 160 on which the protrusion 162 is formed may form a stronger magnetic attraction with the first magnet 140 than the right region of the yoke member 160 without the protrusion. Accordingly, the lens module 120 may move in a state in close contact with the bearing member 170 on one side by the deflected magnetic force formed between the first magnet 140 and the yoke member 160 .

The magnetic attraction formed between the protrusion 162 and the magnet 140 is large enough to offset the rattling caused by the tolerance between the lens module 120 and the bearing member 170 or the lens module 120 and the housing 110 . can be decided. For example, if the tolerance between the lens module 120 and the bearing member 170 or between the lens module 120 and the housing 110 is large, the magnetic attraction between the protrusion 162 and the first magnet 140 may act large. The size of the protrusion 162 may be increased or the first magnet 140 having a strong magnetic force may be used. On the other hand, if the tolerance between the lens module 120 and the bearing member 170 or the lens module 120 and the housing 110 is small, the magnetic force between the protrusion 162 and the first magnet 140 may act relatively small. Thus, the size of the protrusion 162 may be reduced or the first magnet 140 having a weak magnetic force may be used.

Next, another form of the yoke member will be described with reference to FIGS. 6 to 11 .

First, another form of the yoke member will be described with reference to FIG. 6 .

The yoke member 160 according to this form is distinguished from the above-described embodiment in the form of the protrusion 164 . For example, in the present embodiment, the protrusion 164 may be formed to be attached to the yoke member 160 through a later process. The coupling between the protrusion 164 and the yoke member 160 may be made by bonding or other methods. The protrusion 164 may be made of substantially the same or similar material to the yoke member 160 .

Another form of the yoke member will be described with reference to FIG. 7 .

The yoke member 160 according to this form is distinguished from the above-described embodiment in that the protrusion 164 is located on the outside of the coil 150 . That is, the protrusion 164 may be disposed to completely deviate from the winding center CP of the coil 150 to the outside of the coil 150 . The protrusion 164 may be configured to exert a deflected magnetic force along the optical axis direction of the lens module 120 . To this end, the protrusion 164 may be formed to be elongated along the optical axis direction (C-C). The extended length L1 of the protrusion 164 may be substantially the same as the extended length h of the coil 150 in the optical axis direction.

Since the yoke member 160 configured as above has the protrusion 164 formed long in the optical axis direction, even if the first magnet 140 moves in the optical axis direction together with the lens module 120, the first magnet 140 and the yoke member ( 160) can create a biased magnetic force.

Next, another form of the yoke member will be described with reference to FIG. 8 .

The yoke member 160 according to the present form is distinguished from the above-described embodiments in the arrangement position and number of the protrusions 166 . The protrusion 166 may be deviated from the winding center CP of the coil 150 to the outside of the coil 150 and may be disposed to be completely biased to the left. In addition, a plurality of protrusions 166 may be formed at predetermined intervals along the optical axis direction C-C.

The length L2 from the upper end of the uppermost protrusion 166 to the lower end of the lowermost protrusion 162 may be equal to or smaller than the extension length h of the coil 150 in the optical axis direction. In addition, the distance G1 between the protrusion 166 and the protrusion 166 may not be greater than the length in the minor axis direction of the protrusion 166 .

Since the yoke member 160 configured as above is formed with a plurality of protrusions 166 spaced apart in the optical axis direction, even if the position of the lens module 120 is changed, it is deflected between the first magnet 140 and the yoke member 160 . It can generate magnetic force.

Next, another form of the yoke member will be described with reference to FIG. 9 .

The yoke member 160 according to this form is distinguished from the above-described embodiments in the arrangement form of the protrusion 164 . For example, in this embodiment, the protrusion 164 may be formed in the inner space and the outer side surrounded by the coil 150, respectively.

Since the yoke member 160 configured as above has a plurality of protrusions 164 concentrated on one side of the winding center CP of the coil 150, the first magnet 140 and the yoke member 160 are generated between It is possible to increase the magnitude of the deflected magnetic force.

Next, another form of the yoke member will be described with reference to FIG. 10 .

The yoke member 160 according to the present form is distinguished from the above-described embodiments in the overall shape of the yoke member 160 . For example, as shown in FIG. 10 , the yoke member 160 of this form may have asymmetrical left and right areas about the optical axis C-C. That is, the area A1 of the right portion 160a of the yoke member 160 is smaller than the area A2 of the left portion 160b of the yoke member 160 . Accordingly, the left portion 160b of the yoke member 160 may have a stronger attractive force with the first magnet 140 than the right portion 160a.

Since the yoke member 160 configured as above does not form or combine a separate configuration on the surface of the yoke member, it is possible to simplify the manufacturing process of the camera module 100 .

Next, another form of the yoke member will be described with reference to FIG. 11 .

The yoke member 160 according to the present form is distinguished from the above-described embodiments in the overall shape of the yoke member 160 . As shown in FIG. 10 , the yoke member 160 of this form has an asymmetric shape with respect to the optical axis C-C. For example, as shown in FIG. 11 , the yoke member 160 may have a different mass on the left and right with respect to the winding center CP of the coil 150 .

The mass of the right part 160a of the yoke member 160 may be smaller than the mass of the left part 160b of the yoke member 160 . To this end, the first thickness t1 of the right portion 160a of the yoke member 160 may be smaller than the second thickness t2 of the left portion 160b. The portion having the second thickness t2 may be formed to have a predetermined length L3. For example, the portion having the second thickness t2 may generally extend to the winding center CP of the coil 150 .

In the yoke member 160 configured as above, since the mass of the left part 160a is greater than the mass of the right part 160a, the attractive force acting between the left part 160b and the first magnet 140 is the right part 160a. It may be greater than the attractive force acting between and the first magnet (140).

Hereinafter, characteristics according to the lens module driving of the camera module according to the present embodiment will be described with reference to FIGS. 12 and 13 .

The camera module 100 may move the lens module 120 in the optical axis direction as described above. For example, the lens module 120 may move upward or downward along the optical axis direction by the interaction between the first magnet 140 and the coil 150 . Here, the movement of the lens module 120 may be smoothly performed by rolling friction with the bearung member 170 . For example, the lens module 120 may move while making point contact or line contact with the bearing member 170 .

The camera module 100 may minimize the rattling (or tilting phenomenon) occurring during the movement of the lens module 120 . In the camera module 100 according to the present embodiment, a biased attractive force acts between the first magnet 140 of the lens module 120 and the yoke member 160 . For example, the lens module 120 may move along the optical axis direction while being close to the right or left portion of the yoke member 160 .

In the camera module 100 according to the present embodiment, by the attractive force generated between the protrusion 162 and the first magnet 140 , the lens module 120 can move in a state close to the left side of the yoke member 160 . have.

The lens module 120 may selectively contact the bearing members 170a and 170b by the biased attraction between the first magnet 140 and the yoke member 160 . For example, the bearings 171b, 172b, 173b, and 174b disposed on the left side of the lens module 120 are always in contact, but with the bearings 171a, 172a, 173a, 174a disposed on the right side of the lens module 120 and can be selectively contacted.

In the above contact structure between the lens module 120 and the bearing members 170a and 170b, the lens module 120 is supported by a plurality of bearings 171a, 171b, 172b, 173b, and 174b. The rattling (tilt phenomenon) occurring during the movement process can be significantly reduced.

Next, a camera module according to another embodiment will be described with reference to FIGS. 14 to 17 .

The camera module 102 may include a housing 110 and a lens module 120 . Like the camera module 100 described above, the lens module 120 may include a first frame, a second frame, a third frame, and a lens barrel.

The lens module 120 is configured to move in the optical axis direction. A bearing member 170 is disposed between the housing 110 and the lens module 120 so that the lens module 120 can smoothly move in the optical axis direction. The bearing member 170 may be disposed between the groove 112 of the housing 110 and the groove of the lens module 120 .

The camera module 102 may include a first magnet 140 and a first coil 150 for moving the lens module 120 in the optical axis direction. The first magnet 140 may be disposed on the lens module 120 , and the coil 150 may be disposed on the housing 110 . The camera module 102 includes a flexible circuit board 158 for supplying current to the coil 150 . The flexible circuit board 158 is disposed on one surface of the housing 110 . The first magnet 140 and the yoke member 160 capable of generating a magnetic force of a predetermined size may be disposed on the fusible circuit board 158 .

The camera module 102 includes a configuration for generating a deflected magnetic force between the first magnet 140 of the lens module 120 and the yoke member 160 . For example, the camera module 102 may include a protrusion 162 formed on the yoke member 160 as shown in FIG. 16 . The protrusion 162 may be disposed on the outside of the coil 150 to easily form a magnetic force biased with the first magnet 140 .

The camera module 102 may configure the bearing member 170 so that the optical axis direction movement of the lens module 120 may be deflected. The bearing member 170 may include first bearings 172a, 172b, and 173b of a first size and second bearings 171a, 174a, 171b, and 174b of a second size. The bearing member 170 may be asymmetrically disposed with respect to the first magnet 140 and the first coil 150 . For example, three bearings 171a, 172a, 174a are disposed on the right side of the first magnet 140, and four bearings 171b, 172b, 173b, 174b are disposed on the left side of the first magnet 140. can In detail, the first bearings 172a, 172b, and 173b are disposed in different numbers on the right and left sides of the first magnet 140 and the first coil 150, but the second bearings 171a, 174a, 171b, 174b ) may be disposed in equal numbers on the right and left sides of the first magnet 140 and the first coil 150 . As another example, on the right side of the first magnet 140 , the gap between the second bearing 171a and the second bearing 174a is disposed to be smaller than the height of the first magnet 140 or the coil 150 , and the first On the left side of the magnet 140 , a distance between the second bearing 171b and the second bearing 174b may be disposed to be substantially equal to the height of the first magnet 140 or the coil 150 .

The bearing member 170 disposed as above can smoothly support the optical axis direction movement of the lens module 120 according to the deflected magnetic force as shown in FIG. 17 . In detail, the bearings 171a, 172a, 174a disposed on the right side of the first magnet 140 are configured to minimize the rolling contact section between the lens modules 120, and on the left side of the first magnet 140 The arranged bearings 171b, 172b, 173b, and 174b are configured to maximize the rolling contact section between the lens modules 120, thereby reducing the rattling (tilt phenomenon) caused by the movement of the lens module 120 in the optical axis direction. can

The present invention is not limited only to the embodiments described above, and those of ordinary skill in the art to which the present invention pertains may do so without departing from the gist of the present invention described in the claims below. It may be implemented with various modifications. For example, various features described in the above-described embodiments may be applied in combination to other embodiments unless a description to the contrary is expressly stated.

100 camera modules
110 housing
120 lens module
140 magnets
150 coils
160 yoke absence
162 projection (of yoke member)
170 Bearing member
172, 173 1st bearing
171, 174 2nd bearing

Claims (15)

a magnet disposed on the lens module and extending in a longitudinal direction;
bearing members provided between the housing accommodating the lens module and the lens module and disposed on both sides of the magnet in the longitudinal direction;
a coil disposed in the housing and disposed to face the magnet;
a yoke member disposed in the housing and configured to have a magnetic force biased to one side or the other in the longitudinal direction with respect to the magnet;
A camera module comprising a. According to claim 1,
The yoke member,
A camera module having a left and right asymmetric shape about the optical axis of the lens module. According to claim 1,
In the yoke member,
A camera module in which a protrusion protruding toward the magnet is formed. 4. The method of claim 3,
the protrusion,
A camera module formed inside the coil. 4. The method of claim 3,
the protrusion,
A camera module formed outside the winding of the coil. According to claim 1,
The yoke member,
A camera module having a different shape in left and right areas about the optical axis of the lens module. According to claim 1,
The yoke member,
A camera module having a different mass on the left and right about the optical axis of the lens module. According to claim 1,
The bearing members are disposed along the optical axis direction. 9. The method of claim 8,
The bearing members are
a first bearing of a first size; and
A camera module comprising a; a second bearing of a second size larger than the first bearing. 10. The method of claim 9,
The first bearing is a camera module disposed between the second bearing. 11. The method of claim 10,
The first bearing is a camera module disposed in different numbers on one side and the other side of the yoke member. 11. The method of claim 10,
The second bearing is a camera module disposed in equal numbers on one side and the other side of the yoke member, respectively. a lens module configured to move in the optical axis direction by rolling friction;
a magnet and a coil configured to provide a driving force necessary to move the lens module in an optical axis direction;
a first yoke member disposed to face the magnet; and
a second yoke member facing the magnet but provided to be biased toward one side in the longitudinal direction of the magnet;
A camera module comprising a. 14. The method of claim 13,
The second yoke member is a camera module disposed to be biased toward one side of the first yoke member. 14. The method of claim 13,
The second yoke member is a camera module disposed at intervals along the optical axis direction.

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