KR102368109B1 - Camera module - Google Patents

Abstract

In the embodiment, the upper side has a hollow portion for exposing the lens, the lower side has a cover can having an open surface that is all open, a base fastened to the lower side of the cover can, and located above the base and located above the base in the first direction , a housing moved in the second direction, a bobbin accommodated in the housing and moved in the optical axis direction, the bobbin including at least one lens, a magnet part provided on an inner surface of the housing, and the bobbin in the z-axis direction A first coil part provided on the outer surface of the bobbin to move to the , and a second coil part provided on the upper surface of the base to move the housing in which the bobbin is accommodated in a first direction and a second direction It provides a camera module including an actuator and a printed circuit board provided between the second coil unit and the base to respectively apply power for controlling the first coil unit and the second coil unit.

Description

Camera Module {CAMERA MODULE}

The present invention relates to a camera module, and more particularly, to a camera module having an improved structure in which a hand shake correction function and an auto-focusing function are driven by a single actuator.

When taking a picture with a camera in hand, hand shake is unavoidable. Due to such hand shake, even the photographing device vibrates. Due to such hand shake, a photographed image appears blurry, and it is difficult to focus when focusing an object at a short distance.

In order to overcome the vibration caused by hand shake, a recent photographing apparatus is provided with an optical image stabilizer (OIS) module to reduce vibration caused by hand shake when a user holds the photographing apparatus by hand. This OIS module is an image stabilization module that serves to correct hand shake during camera shooting.

In recent years, as the spread of smartphones and tablet PCs has expanded, camera modules for mobile devices capable of autofocus (AF) adjustment and hand-shake correction are being developed.

The OIS module uses a lens shift method that moves the lens in the horizontal direction according to the object to be moved in the X and Y axes.

However, in the case of the lens shift method, the lens unit moving in the Z axis by the AF module is additionally shaken along the X and Y axes, and a space is required inside the AF module to shake the lens unit in the X and Y axes, so the structural Due to the characteristics of the camera module, the width of the camera module is widened, and thus there is a problem that goes against the miniaturization and thinness of the photographing device.

In addition, since the lens is horizontally shaken inside the AF module, the optical axis of the optical system is shaken.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a camera module having faster and superior reliability for AF function and OIS function compared to the prior art.

Another object of the present invention is to provide a camera module having a structure in which product assembly is easy.

In order to achieve the above object, the embodiment includes a cover can having a hollow portion for exposing the lens formed on the upper side and an open surface that is fully open on the lower side, a base fastened to the lower side of the cover can, and an upper side of the base a housing positioned in the , and moving in the first and second directions; a bobbin accommodated in the housing and moved in the optical axis direction, the bobbin including at least one lens; and a magnet part provided on the inner surface of the housing; A first coil unit provided on an outer surface of the bobbin to move the bobbin in the z-axis direction, and a first coil unit provided on an upper surface of the base to move the housing in which the bobbin is accommodated in the first direction and the second direction A camera module including an actuator including two coil parts, and a printed circuit board provided between the second coil part and the base to respectively apply power for controlling the first coil part and the second coil part to provide.

In addition, the base includes a base body formed in a shape corresponding to the inner surface of the cover can, an opening formed in the center of the base body, and a fastening that protrudes from the upper side of the base body to face the inner surface of the cover can It is characterized by including wealth.

In addition, the housing includes at least two or more lower stoppers protruding from the lower surface, and the fastening part of the base accommodates the lower stoppers, respectively, to limit the downward movement of the housing and movement in the first direction and the second direction It is characterized in that it includes a recessed portion.

In addition, the bobbin includes at least two flanges vertically formed on an outer circumferential surface, and the housing includes a seating portion formed on an inner surface at regular intervals to seat the flanges.

In addition, the housing is characterized in that it includes an upper stopper formed adjacent to the cover can at least two or more protruding from the upper surface.

In addition, the housing includes an upper stopper that is formed to protrude at least two or more from the upper side and positioned adjacent to the cover can, wherein the upper stopper and the lower stopper are provided on a straight line with respect to the z-axis.

In addition, the upper stopper and the lower stopper is characterized in that formed adjacent to the magnet portion.

In addition, the bobbin is characterized in that it includes a fixing rib protruding from the outer peripheral surface so that the first coil unit can be fixed.

In addition, the first coil part is provided to face an inner surface of the magnet part, and the second coil part is provided to face a lower surface of the magnet part.

In addition, the second coil part is characterized in that it is formed of a patterned coil.

In addition, the second coil unit and the printed circuit board are coupled by a soldering method, and the body of the base has a solder ball receiving groove for accommodating a solder ball generated when the second coil unit and the printed circuit board are coupled by a soldering method. It is characterized in that it is formed.

In addition, it transmits the power applied by the printed circuit board to the first coil unit, characterized in that it comprises an elastic unit for restricting movement of the optical axis direction, the first direction or the second direction of the bobbin.

In addition, the elastic unit is characterized in that it comprises an upper spring provided at the upper end of the housing, a lower spring provided at the lower end of the housing, and two or more side springs provided between the housing and the base.

In addition, two of the side springs are electrically connected to the printed circuit board, the two side springs are electrically connected to an upper spring, and the upper spring is one end and the other end of the coil wound in the first coil unit. characterized in that it is electrically connected to the

In addition, it is mounted on the printed circuit board characterized in that it further comprises a hall sensor for detecting the movement of the actuator.

In addition, the base is characterized in that a hall sensor receiving groove for accommodating the hall sensor unit is formed.

In addition, the hall sensor unit is characterized in that it is provided in a straight line with the magnet unit with respect to the optical axis.

In addition, the magnet unit includes four magnets formed at regular intervals at an angle of 90°, and the hall sensor unit is characterized in that the two hall sensors are provided for magnets adjacent to each other.

The embodiment has an effect of having quick and excellent reliability with respect to the auto-focusing function and the anti-shake function by individually providing actuators that act individually on the magnet unit provided for auto-focusing.

In addition, the embodiment has an excellent effect on impact resistance and anti-shake function by having a side spring.

In addition, in the embodiment, the second coil unit and the magnet unit are positioned on a straight line, thereby facilitating product assembly by mutual attraction.

1 is a combined perspective view of a camera module according to an embodiment;
2 is an exploded perspective view of a camera module according to an embodiment;
3 is a perspective view of a housing according to an embodiment;
4 is a perspective view of a bobbin according to an embodiment;
5 is a perspective view of a base according to an embodiment;
Fig. 6 schematically shows an actuator according to an embodiment;
7 is a view showing an elastic unit according to the embodiment.
Figure 8 is a modified perspective view of the side spring to help the understanding of the embodiment.
9 is a diagonal cross-sectional view of the camera module according to the embodiment.

Unless otherwise specified, all terms herein have the same general meaning as understood by those skilled in the art, and if a term used in this specification conflicts with the general meaning of the term, the definition used herein shall govern.

However, the invention to be described below is only for explaining the embodiments of the present invention and not for limiting the scope of the present invention, and the same reference numbers used throughout the specification indicate the same components.

The embodiment implements a camera module that has fast and excellent reliability for an auto focusing (AF) function and an image stabilization (OIS) function, and has improved durability, and these technical features will be described in detail with reference to the accompanying drawings below. .

1 is a combined perspective view of a camera module according to an embodiment, and FIG. 2 is an exploded perspective view of a camera module according to the embodiment.

Referring to FIG. 1 , in this specification, the z-axis means an optical axis direction, the x-axis means a first direction orthogonal to the z-axis direction, and the y-axis means a second direction orthogonal to the z-axis and the x-axis, respectively.

Referring to FIG. 2 , the embodiment largely includes a cover can 100 , a base 200 , a bobbin 300 , a housing 400 , an actuator 500 , a printed circuit board 600 , and an elastic unit 700 . do.

The upper side of the cover can 100 is formed with a hollow portion 110 for exposing the lens, the lower side is formed with an open surface (not shown) that is all open, and the base 200 seals the open surface, It is fastened to the lower side of the cover can 100 . A method of fastening the cover can 100 and the base 200 will be described later.

The housing 400 is positioned above the base 200 and moved along the x and y axes, and the bobbin 300 is accommodated in the housing 400 and moved along the z axis, which is the optical axis direction, at least one The above lenses are included.

In order to move the housing 400 and/or the bobbin 300 , the actuator 500 moves the magnet part 510 provided on the inner surface of the housing 400 and the bobbin 300 in the z-axis direction. In order to move the first coil part 520 provided on the outer surface of the bobbin 300 and the housing 400 in which the bobbin 300 is accommodated, the base 200 to move in the x and y-axis directions. It includes a second coil unit 530 provided on the upper surface of the.

Meanwhile, the printed circuit board 600 includes the second coil unit 530 and the base 200 to respectively apply power for controlling the first coil unit 520 and the second coil unit 530 . may be provided in between.

Meanwhile, the elastic unit 700 includes an upper spring 710 provided at the upper end of the housing 400 , a lower spring 720 provided at the lower end of the housing 400 , the housing 400 and the It includes two or more side springs 730 provided between the base 200 to provide a return force to the bobbin 300 or the housing 400 , and the printed circuit board 600 to the first coil unit 520 . ) is supplied from the

Hereinafter, each component according to the embodiment of the present invention will be described in more detail.

1 and 2 , the cover can 100 has a hollow portion 110 for exposing the lens on the upper side and an open surface (not shown) on the lower side.

The cover can 100 is coupled to the fastening part 220 of the base 200 to be described later in close contact with the inner surface, but for a more robust fastening, the base 200 to be described later is fastened to the lower end of the side of the cover can 100 for more robust fastening. One or more fastening holes 120 coupled to the protrusion 221 may be formed.

Meanwhile, in the embodiment, the cover can 100 is illustrated as a hexahedron, but is not limited to this shape.

3 is a perspective view of the base 200 according to the embodiment.

The base 200 is formed in a shape corresponding to the open surface of the cover can 100, and is formed in a rectangular shape in the embodiment of the present invention. This base 200 is fastened to the lower side of the cover can 100 to support the components accommodated in the cover can 100, which will be described below, from below.

The base 200 includes a base body 210 formed in a shape corresponding to the inner surface of the cover can 100 , an opening 210a formed in the center of the base body, and an upper side of the base body 210 . It includes a fastening part 220 that protrudes to the inner surface of the cover can 100 and the face-to-face.

For solid fastening with the cover can 100 , a fastening protrusion 221 corresponding to the fastening hole 120 formed in the cover can 100 is formed on the side of the base body 210 or the fastening part 220 . may be formed, and conversely, a fastening protrusion 221 may be formed on the inner side of the cover can 100 , and a fastening hole 120 may be formed in the base 200 .

In addition, a slit-shaped side spring insertion groove 211 into which a second fastening part 732 of a side spring 730 to be described later is inserted may be formed on each side of the base body 210 .

In addition, in the upper surface of the base body 210, a solder ball receiving groove 213 for accommodating a solder ball (not shown) generated when a second coil unit 530 and a printed circuit board 600, which will be described later, are combined by a soldering method. And, a hall sensor accommodating groove 212 for accommodating the hall sensor unit to be described later is formed, so that the overall volume of the camera module can be miniaturized.

The solder ball accommodating grooves 213 may be formed on the upper surface of the base body 210 at regular intervals, and the hall sensor accommodating grooves 212 are formed on a straight line with respect to the magnet portion and the z-axis direction to be described later. (See Fig. 9).

The free end of the fastening part 220 accommodates a lower stopper 420 of the housing 400 to be described later, respectively, and a recess 222 for limiting the lower movement and the x and y-axis rotational movement of the housing 400 . can be formed.

This recess 222 is formed as a semi-circular groove at the free end of the fastening part 220, the lower surface restricts the downward movement together with the lower stopper 420 of the housing 400 to be described later, and the side surface of the housing Limits the rotational (x, y-axis) motion of

4 is a perspective view of the bobbin 300 according to the embodiment.

Referring to FIG. 4 , the bobbin 300 is accommodated in a housing 400 to be described later, and includes a lens barrel (not shown) for photographing a subject. The lens barrel may be formed as a cylindrical case for fixing one or more lenses (not shown), and may be fastened to the inner side of the bobbin 300 by means of a screw thread 301 coupling as shown, but without a screw thread coupling. can be fastened in this way.

The bobbin 300 is moved in the z-axis direction, which is the optical axis direction, by an actuator 500 to be described later.

On the other hand, the bobbin 300 may be provided with at least two flange portions 310 protruding in the vertical direction on the outer circumferential surface. The flange part 310 is seated on a seating part 410 of the housing 400 to be described later, and this structure limits the downward movement of the bobbin 300 .

The outer peripheral surface of the bobbin 300 may include a fixing rib 320 protruding so that a first coil unit 520, which will be described later, can be fixed, and the fixing rib 320 is one of the peripheral surfaces of the bobbin 300. It may be formed on the lower side of the flange portion 310 .

In addition, on the upper surface of the bobbin 300, at least two upper surface fastening protrusions 330 corresponding to the upper surface fastening holes 712a formed in the second support part 712 of the upper spring 710 to be described later are formed to protrude. In addition, at least two or more preliminary stoppers 340 positioned adjacent to the cover can 100 may be formed to protrude.

5 is a perspective view of a housing 400 according to an embodiment.

Referring to FIG. 5 , the housing 400 is positioned on the base 200 and serves to support the bobbin 300 .

When power is applied to the camera module, the housing 400 is positioned to float on the base 200 (see FIG. 9 ).

Specifically, the housing 400 may be formed in a shape corresponding to the base 200, and in the embodiment, the base 200 and the housing 400 are formed in a rectangular shape, but the shape is not limited thereto. .

On the outer surface of the housing 400, side fastening protrusions 433 for fastening the first fastening part 731 of the side spring 730 to be described later may be protruded from each side thereof, and a side spring to be described later. A first fastening hole 731a corresponding to the side fastening protrusion 433 may be formed in the first fastening part 731 of the 730 .

In addition, an upper fastening protrusion 431 for fastening an upper spring 710 to be described later is formed on the upper surface of the housing 400 to protrude from each upper surface, and the first support portion 711 of the upper spring 710 is formed. ), an upper surface fastening hole 711a corresponding to the upper fastening protrusion 431 is formed.

In addition, the housing 400 includes an upper stopper 430 protruding from the upper surface of at least two and positioned adjacent to the upper inner surface of the cover can 100, and is formed to protrude on the lower surface of the base ( It includes at least two or more lower stoppers 420 positioned in a floating state in the recess 222 of the 200 .

The upper stopper 430 and the lower stopper 420 are formed on a straight line with respect to the z-axis to enhance durability against impact, and are also formed adjacent to the magnet unit 510 to be described later to form the magnet unit 510. It is possible to prevent deformation of the housing 400 from bending stress due to the weight of the chair.

In addition, a seating portion 410 is formed on the inner side of the housing 400, and the flange portion 310 of the bobbin 300 is seated on the seating portion 410, resulting in the bobbin 300. limit the downward movement of The seating portion 410 may be continuously protruded from the inner surface of the housing 400 in a rim shape, but may be formed at regular intervals as shown.

6 is a diagram schematically illustrating an actuator according to an embodiment.

In the actuator 500 according to the embodiment of the present invention, two coil units 520 and 530 act on the magnet unit 510 to implement a hand-shake function and an auto-focusing function.

As described above, the actuator 500 includes the magnet part 510 provided on the inner surface of the housing 400 and the outer surface of the bobbin 300 to move the bobbin 300 in the z-axis direction. The first coil unit 520 provided in the , and the second coil unit 530 provided on the upper surface of the base 200 to move the housing 400 in which the bobbin 300 is accommodated in the x and y-axis directions. ) is included.

Here, the first coil unit 520 is provided to face the inner surface of the magnet unit 510 , and the second coil unit 530 is provided to face the lower side surface of the magnet unit 510 .

Specifically, the first coil unit 520 is formed in a shape corresponding to the outer circumferential surface of the bobbin 300, is provided on the outer circumferential surface of the bobbin 300, and is electrically connected to the printed circuit board 600 to be described later. It is controlled by the printed circuit board 600 to do.

That is, the first coil unit 520 forms an electromagnetic field with a current applied to the wound coil and interacts with the magnetic field of the magnet unit 510 to move the bobbin 300 in the z-axis direction, which is the optical axis direction. move it down The upper and lower motions of the bobbin 300 are limited by the upper spring 710 and the lower spring 720 .

Power applied to the first coil unit 520 is the printed circuit board 600 , a pair of opposed side springs 730 electrically connected to the printed circuit board 600 , and the pair of opposed side surfaces The spring 730 and the upper spring 710 electrically connected may be applied sequentially, and a specific electrical coupling relationship therefor will be described later.

Meanwhile, the second coil unit 530 is provided on the upper surface of the base 200 to move the housing 400 along the x and y axes.

Specifically, the second coil unit 530 may be mounted on the printed circuit board 600 to be electrically connected to the printed circuit board 600 , and unlike the annular first coil unit 520 , printed Four may be provided on the circuit board 600 at an angle of 90°, and these four second coil units 530 may be individually controlled by the printed circuit board 600 to be described later.

Of course, the second coil unit 530 should be positioned on a straight line with respect to the magnet unit 510 and the z axis in order to move the housing 400 along the x and y axes.

The current applied through the printed circuit board 600 flows in the coil wound of the second coil unit to form an electromagnetic field, and interacts with the magnetic field of the magnet unit 510 to cause the housing 400 to x, y move to the axis.

On the other hand, in consideration of miniaturization of the camera module, specifically, lowering the height in the z-axis direction, which is the optical axis direction, the second coil unit 530 may be formed of a patterned coil.

In this case, the lower surface of the second coil unit 530 is soldered from the side of the printed circuit board 600 and mounted on the printed circuit board 600 , and the solder ball formed during the soldering is in the z-axis direction of the camera module. Since the height is formed, a soldering receiving groove 213 for accommodating such a solder ball may be formed in the base 200 of the present invention.

7 is a view showing an elastic unit according to the embodiment.

Referring to FIG. 7 , the elastic unit 700 includes an upper spring 710 , a lower spring 720 , and a side spring 730 .

The upper spring 710, the lower spring 720, and the side spring 730 are disposed on each side of the housing 400, and may be made of a general coil spring, but for efficiency of production, a single sheet material is bent and It is preferably formed of a leaf spring made of a cut shape.

The upper spring 710 is fastened to the upper surface of the housing 400 and the upper surface of the bobbin 300 to support the bobbin 300, and to provide a return force when the bobbin 300 moves upward. ) is provided at the upper end of the

Specifically, the upper spring 710 includes a power input member 710a to which the power applied from the printed circuit board 600 is introduced, and the power applied to the first coil unit 520 to be energized and discharged. and an output member 710b.

The power input member 710a and the power output member 710b may be formed as a leaf spring in a shape symmetrical about the optical axis, and may be formed as a single leaf spring, but as a separate leaf spring for input and output of power. It is preferable to form

Each of the power input member 710a and the power output member 710b of the upper spring 710 includes a first support part 711 fastened to the housing 400 and a second support part fastened to the bobbin 300 , respectively. 712 , and an upper elastic part 713 electrically connecting the first support part 711 and the second support part 712 and having at least one bending part formed therein.

As shown, the upper elastic part 713 may be formed of two bending parts formed between the first support part 711 and the second support part 712 .

As described above, at least one upper surface fastening protrusion 431 is formed on the upper surface of the housing 400 , and an upper surface fastening hole formed in the first support part 711 to correspond to the upper surface fastening protrusion 431 . 711a may be formed.

In addition, a first protrusion 711b for electrically connecting to two side springs 730 to be described later is formed on the first support portion 711 .

On the other hand, at least one upper surface fastening protrusion 330 is formed on the upper surface of the bobbin 300 , and the second support part 712 has an upper surface fastening hole 712a formed to correspond to the upper surface fastening protrusion 330 ). can be formed.

In addition, one end 520a and the other end of the coil wound around the first coil unit 520 in the second support part 712 of each of the power input member 710a and the power output member 710b of the upper spring 710 . A second protrusion 712b for electrically connecting to the 520b is formed, respectively.

The first protrusion 711b, the side spring 730, the second protrusion 712b, and one end 520a and the other end 520b of the coil may be electrically coupled by soldering.

On the other hand, the lower spring 720 is provided at the lower end of the housing 400 to support the lower side of the bobbin 300, and since the power of the printed circuit board 600 is not input or output, a single plate It may be formed of a spring. The lower spring 720 may also have at least two lower surface fastening holes 720a and 720b fastened to a protrusion (not shown) formed on the lower surface of the bobbin 300 .

On the other hand, one side of the side spring 730 is fastened to the side surface of the housing 400 and the other side is fastened to the side surface of the base 200 for damping the x and y-axis vibrations. The side spring 730 may be provided with four side springs forming a predetermined interval at an angle of 90°.

Specifically, the side spring 730 includes a first fastening part 731 fastened to one side of the housing 400 , and a second fastening part 732 fastened to one side of the base 200 , respectively. , and an elastic part 733 formed perpendicular to the first coupling part 731 and the second coupling part 732 .

At least one bending part is formed in the elastic part 733 , and two elastic parts 733 may be formed in a shape opposite to each other to one side spring 730 .

A first fastening hole 731a corresponding to the side fastening protrusion 433 formed on the housing 400 is formed in the first fastening part 731 of the side spring 730 .

Similarly, the second fastening part 732 is fastened to the base 200 in the same manner as the first fastening part 731 , or the second fastening part 732 is fastened to the base 200 as described above. The side spring insertion groove 211 having the same slit shape as the width may be formed to slide the second fastening part 732 to the fastening.

The side springs 730 are provided on the side surfaces of the housing 400 and the base 200 so that at least two or more face each other, and may be provided on each of the four sides of the housing 400 for effective vibration damping.

Here, the second fastening portions 732 of the two side springs 730a and 730b among the side springs 730 are electrically connected to the printed circuit board 600, respectively, and the two side springs 730a and 730b) The first fastening parts 731 of each are electrically connected to the upper spring 710 , and the upper spring 710 includes one end 520a and the other end 520b of the wound coil of the first coil unit 520 . electrically connected to

This configuration for applying power to the first coil unit 520 does not require a separate power supply line, so the reliability and durability of the camera module are improved, and the product can be miniaturized.

The printed circuit board 600 includes two soldering points (610a, 610b, see FIG. 2) formed to be electrically connected to the second fastening part 732 of the two side springs 730a and 730b, respectively. , the two second fastening parts 732 are respectively formed with soldering parts 732a for being soldered to the soldering points 610a and 610b of the printed circuit board 600 .

8 is a modified perspective view of a side spring for better understanding of the embodiment.

Referring to FIG. 8 , the side spring 730 is receiving a force in the left direction. Here, the side springs 730a on both sides are f _x The force is received in the direction, and the front and rear side springs 730b are receiving force in the f _y direction.

One end and the other end of each elastic part 733 of all the side springs 730 only need to be positioned on a vertical line with respect to the first fastening part 731 and the second fastening part 732 formed horizontally, and the middle At least one elastic part 733, which is a bending part, may be formed, but it is preferable to satisfy the following conditional expression.

<conditional expression>

K _x = 0.5~2.0K _y

K _z = 5~100K _x

Here, K represents the spring constant.

In other words, the spring constant in the x-axis direction and the spring constant in the y-axis direction are preferably approximately the same, and the spring constant in the z-axis direction is 5 to 100 times the spring constant compared to the spring constant in the x-axis or y-axis direction. It is preferable to have

If this conditional expression is satisfied, the reason why it is preferable comes from the formula f=Kx. where f is the force of the magnet and coil, and x is the distance traveled. That is, the bobbin can be moved by the f value only when the K value is small, and the spring constant, which is the K value, must be considered in the x, y, z direction.

The reason for considering the z-axis movement of the side spring 730 for providing a return force for the x and y-axis movement is to consider the weight of the bobbin 300 itself in which the lens is accommodated, and also, the camera shooting direction is the ground Or because it can point to the sky.

Meanwhile, referring to FIG. 1 , the printed circuit board 600 is fastened to the upper side of the base 200 , and is provided on the base 200 to control the actuator 500 . An image sensor (not shown) and various devices (not shown) for converting an optical signal introduced through a lens into an electrical signal may be mounted on the printed circuit board 600 .

In addition, in order to apply power to the first coil unit 520 , the printed circuit board 600 has soldering points 610a and 610b at two places so as to be electrically connected to the side spring 730 . As described above, the soldering points 610a and 610b are soldered to and electrically coupled to the soldering portion 732a formed in the second fastening portion 732 of the side spring 730 .

In the embodiment, the two coil parts 520 and 530, that is, the first coil part 520 for moving the bobbin 300 in the z-axis direction, which is the optical axis direction, and the bobbin 300 in the x-axis or y-axis direction. By individually driving the second coil unit 530 for moving the accommodated housing 400, there is an advantage of enabling an excellent and rapid auto-focusing function and an anti-shake function.

Here, the structure and coupling relationship of the camera module according to the embodiment of the present invention will be described in detail as follows.

9 is a diagonal cross-sectional view of a camera module according to an embodiment. That is, it is a cross-sectional view in the A-A direction shown in FIG. 1 .

Referring to FIG. 9 , as described above, since the housing 400 and the base 200 are formed to correspond to the shape of the inner surface of the cover can, if the inner surface of the cover can 100 is formed in a rectangular shape, The housing 400 and the base 200 are also formed in a rectangular shape.

In this state, considering the circular bobbin 300 positioned in the housing 400 , the magnet part 510 of the actuator 500 is provided at an empty space corner of the housing 400 , respectively. It is preferable because the inner space of the cover can 100 can be efficiently utilized. That is, the magnet unit 510 may include four magnets 511 , 512 , 513 , and 514 provided at regular intervals at an angle of 90° on the inner surface of the housing 400 .

Meanwhile, the present invention may further include a hall sensor unit 900 provided on the printed circuit board 600 and configured to detect the movement of the magnet unit 510 . The Hall sensor unit 900 senses the applied voltage and the intensity and phase of the current flowing through the coil, and interacts with the printed circuit board 600 to precisely control the actuator 500 .

The hall sensor unit 900 is provided on a straight line with the magnet unit 510 and needs to detect displacements in the x-axis and y-axis, so that the hall sensor unit 900 is located at one of the corners of the printed circuit board 600 . It includes two Hall sensors respectively provided at two adjacent corners, which are mounted in the Hall sensor receiving groove 212 of the base shown in FIG. 3 .

Although the hall sensor unit 900 is provided closer to the second coil unit 530 than the magnet unit 510, considering that the strength of the magnetic field formed in the magnet is several hundred times greater than the strength of the electromagnetic field formed in the coil, The influence of the second coil unit 530 in detecting the movement of the magnet unit 510 is not considered.

The magnet part 510 used above is called a 'magnet', the first coil part 520 is called a 'first coil', the second coil part 530 is called a 'second coil', and the upper spring 710 is called ' The upper elastic unit is called ', the lower spring 720 is called a 'lower elastic unit', the side spring 730 is called a 'lateral elastic unit', the printed circuit board 600 is called a 'substrate', and the hall sensor part 900 can be called a 'Hall sensor'. The configuration before the printed circuit board on which the image sensor is disposed and the lens are assembled in the camera module may be referred to as a 'lens driving actuator'.

Above, those skilled in the art from the above description will know that various changes and modifications are possible without departing from the technical spirit of the present invention. It should be determined by the scope and its equivalent scope.

100: cover can 110: hollow part
120: fastening hole 200: base
210: base body 210a: opening
211: side spring insertion groove 212: hall sensor receiving groove
213: soldering receiving groove 220: fastening part
221: fastening protrusion 222: recess
300: bobbin 301: thread
310: flange portion 320: fixed rib
330: upper surface fastening projection 340: spare stopper
400: housing 410: seating part
420: lower stopper 430: upper stopper
431: upper surface fastening protrusion 433: side fastening protrusion
500: actuator 510: magnet unit
520: first coil unit 530: second coil unit
600: printed circuit board 700: elastic unit
710: upper spring 710a: power input member
710b: power output member 711: first support
711a: upper surface fastening hole 711b: first protrusion
712: second support 712a: upper surface fastening hole
712b: second protrusion 720: lower spring
730: side spring 731: first fastening part
731a: first fastening hole 732: second fastening part
732a: soldering part 733: elastic part
900: hall sensor unit

Claims (23)

housing;
a bobbin disposed within the housing;
a first coil disposed on an outer circumferential surface of the bobbin;
a magnet disposed in the housing and facing the first coil;
a base disposed under the housing;
a substrate including a second coil facing the magnet and disposed on the base;
an upper elastic unit connecting the housing and the bobbin; and
and a lateral elastic unit electrically connecting the upper elastic unit and the substrate,
The bobbin includes two fixed ribs protruding from the outer circumferential surface of the bobbin,
The first coil includes a first portion disposed between the two fixing ribs, a second portion disposed on the first portion and coupled to the upper elastic unit, and connecting the first portion and the second portion A lens drive actuator comprising a third part. According to claim 1,
The upper elastic unit includes a first support portion coupled to the housing, a second support portion coupled to the bobbin, and an elastic portion connecting the first support portion and the second support portion,
The second support portion includes a first region and a second region connected to the first coil and spaced apart from each other,
A lens driving actuator that does not overlap an imaginary straight line connecting the first region and the second region with the elastic part when viewed from the top. 3. The method of claim 2,
and the second portion of the first coil is connected to the upper elastic unit through a conductive member. 3. The method of claim 2,
The second part of the first coil is a lens driving actuator that is directly coupled to the upper elastic unit through soldering. 3. The method of claim 2,
The second support portion of the upper elastic unit is electrically connected to the second portion of the first coil by means of a lens driving actuator. 6. The method of claim 5,
The second support portion of the upper elastic unit includes a fastening hole,
The bobbin includes a fastening protrusion formed on the upper surface of the bobbin,
The fastening protrusion of the bobbin is coupled to the fastening hole of the upper elastic unit,
The second portion of the first coil is a lens driving actuator having one end and the other end of the first coil. 7. The method of claim 6,
The first region of the second support part of the upper elastic unit is closer to the fastening hole than the elastic part. 3. The method of claim 2,
The upper elastic unit includes two upper elastic units spaced apart from each other,
The first coil is a lens driving actuator electrically connected to the substrate through the two upper elastic units and the lateral elastic unit. 9. The method of claim 8,
The second part of the first coil is connected to one of the two upper elastic units and includes a 2-1 part including one end of the first coil, and the second part of the two upper elastic units is connected to the other of the two upper elastic units, and the second part is connected to the other of the two upper elastic units. A lens driving actuator including a second portion 2-2 including the other end of the first coil. 3. The method of claim 2,
A lens driving actuator comprising an upper plate and a cover can including a side plate extending from the upper plate to the base. 11. The method of claim 10,
The housing includes at least two upper stoppers protruding from the upper surface of the housing,
The at least two upper stoppers of the housing are disposed adjacent to the upper plate of the cover can in an optical axis direction. 3. The method of claim 2,
The housing includes a lower stopper protruding from the lower surface of the housing,
and the base includes a recess for accommodating the lower stopper of the housing to limit lower movement and rotational movement of the housing. 3. The method of claim 2,
The bobbin includes a flange portion protruding more than the fixed rib from the outer peripheral surface of the bobbin,
When the bobbin moves downward, the flange portion of the bobbin is in contact with the housing. 14. The method of claim 13,
The flange portion is a lens driving actuator disposed between the upper surface of the bobbin and the first coil. 3. The method of claim 2,
The second coil is coupled to the substrate through a solder ball,
The base includes a solder ball receiving groove formed on the upper surface of the base,
The solder ball is a lens driving actuator disposed in the solder ball receiving groove of the base. 16. The method of claim 15,
and a Hall sensor disposed on the substrate and sensing the magnet,
The base includes a Hall sensor receiving groove formed on the upper surface of the base,
The Hall sensor is disposed in the Hall sensor receiving groove of the base,
The hall sensor receiving groove is a lens driving actuator spaced apart from the solder ball receiving groove. 3. The method of claim 2,
The upper elastic unit includes a first elastic unit and a second elastic unit spaced apart from each other,
The first region is a partial region of the second support portion of the first elastic unit,
The second region is a lens driving actuator that is a partial region of the second support portion of the second elastic unit. housing;
a bobbin disposed within the housing;
a first coil disposed on an outer circumferential surface of the bobbin;
a magnet disposed in the housing and facing the first coil;
a base disposed under the housing;
a substrate including a second coil facing the magnet and disposed on an upper surface of the base;
an upper elastic unit connecting the housing and the bobbin; and
and a lateral elastic unit electrically connecting the upper elastic unit and the substrate,
The bobbin includes an upper fixed rib and a lower fixed rib protruding from the outer circumferential surface of the bobbin,
The upper fixed rib is disposed above the lower fixed rib,
The first coil includes a first portion disposed between the upper fixed rib and the lower fixed rib, a second portion disposed on the first portion and coupled to the upper elastic unit, and the first portion and the second portion a third part connecting the two parts;
the second part of the first coil is disposed above the upper fixing rib;
The upper elastic unit includes a first elastic unit and a second elastic unit spaced apart from each other,
Each of the first elastic unit and the second elastic unit includes a support portion coupled to the bobbin, and an elastic portion connected to the support portion,
When viewed from the top, an imaginary straight line connecting the first region of the first elastic unit connected to the first coil and the second region of the second elastic unit connected to the first coil is the first elastic unit A lens driving actuator that does not overlap with the elastic part of 19. The method of claim 18,
The first region is a partial region of the support portion of the first elastic unit, the second region is a partial region of the support portion of the second elastic unit,
The second portion of the first coil includes a first end and a second end of the first coil,
the first region is coupled to the first end of the first coil by solder;
The second region is a lens driving actuator coupled to the second end of the first coil by solder. 19. The method of claim 18,
The support portion of the upper elastic unit is disposed on the upper surface of the bobbin,
The upper fixing rib of the bobbin is a lens driving actuator spaced apart from the upper surface of the bobbin. Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil disposed on an outer circumferential surface of the bobbin;
a magnet facing the first coil;
a substrate including a second coil facing the magnet and disposed on the base;
a first elastic unit connecting the housing and the bobbin; and
a second elastic unit electrically connecting the first elastic unit and the substrate;
The bobbin includes two fixed ribs,
The first coil includes a first portion disposed between the two fixed ribs, a second portion coupled to the first elastic unit, and a third portion connecting the first portion and the second portion, ,
The first elastic unit includes a first unit elastic unit and a second unit elastic unit including a support portion coupled to the housing and the bobbin, and an elastic portion connected to the support portion,
The second portion of the first coil includes a first region coupled to the first unit elastic unit and a second region coupled to the second unit elastic unit,
The elastic part of the first unit elastic unit connects the first area and the second area and does not overlap an imaginary surface parallel to the optical axis. printed circuit board;
an image sensor disposed on the printed circuit board;
22. The lens drive actuator of any one of claims 1 to 21; and
and a lens coupled to the bobbin of the lens driving actuator and disposed at a position corresponding to the image sensor. A smartphone comprising the camera module of claim 22.

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