KR20200140433A - Camera module actuator - Google Patents

Abstract

Disclosed is a small camera. The small camera according to the present invention comprises: an optical unit having a magnet coupled to an outer surface thereof; a housing for accommodating the optical unit to be movable in an optical axis direction, and having a coil disposed at a position corresponding to the magnet; and an image sensor module mounted on a lower portion of the housing, and having an image sensor mounted on an upper surface of a substrate. The inside of the housing includes a first region on one side of the housing in which the coil is positioned, and a second region remaining except the first region. The first region has a closed lower portion, and the second region has an open lower portion, and the substrate is formed in a size corresponding to an opening of a lower end of the second region, and is coupled to a lower portion of the housing through the opening. Also, the opening of the lower end of the second region having the open lower portion is stepped upward by a predetermined height more than a closed portion of a lower end of the first region having the closed lower portion. Accordingly, the present invention can secure an additional component mounting space by a space occupied by a part of the substrate of the image sensor module.

Description

Small camera {Camera module actuator}

The present invention relates to a small camera, and more particularly, to a small camera mounted on a portable terminal or the like and having a zoom function and an automatic focus adjustment function.

Portable terminals such as recent smartphones (hereinafter referred to as'mobile') are in line with the advancement of the technology, moving away from the existing simple phone function, and with multi-convergence that can execute various functions such as music, movies, TV, and games. It is evolving. One of the factors leading the development of multi-convergence is the camera lens module.

The camera lens module (hereinafter referred to as'small camera') mounted on mobile is equipped with a zoom function or an auto focusing function to meet the recent trend focusing on high pixels and high functions according to the user's demand. It is changing to a structure equipped with the same various additional functions. The zoom function or auto focusing function is implemented by an actuator mounted on a small camera.

Actuators mounted on small cameras to implement a zoom or auto focus function can be classified into a VCM (Voice Coil Motor) type and an encoding type. The VCM type controls the lifting position of the optical unit (lens assembly) by using the interaction of the magnetic and electric fields, and the encoding type controls the movement of the optical unit based on the position value recognized by the sensor by adding a sensor to the VCM type. do.

The VCM type is more cost-effective than the encoding type, but its driving precision is relatively inferior. On the other hand, the encoding type has disadvantages in terms of cost, such as an increase in manufacturing cost as parts such as sensors are required, but the advantage of having very high driving precision because it controls the movement of the optical unit based on the position value identified through the sensor. There is this.

Of course, since the VCM type or the encoding type implements zoom or automatic focus control by using the force generated by the interaction between the magnetic field and the electric field, the basic operating principle is the same and there is no significant difference in configuration. Conventional VCM or encoding type actuators mounted on small cameras have a movable part mounted with a magnet and a fixed part composed of a coil as a basic configuration.

In the compact camera including the actuator for zooming and automatic focusing, the moving part moves relative to the driving part in the direction of the optical axis by the force generated by the interaction between the electric field generated by the coil and the magnetic field of the magnet. By adjusting the separation distance of the moving part to the image sensor, a zoom function or an automatic focus control function is implemented.

1 and 2 are views showing an example of a conventional small camera including a conventional zoom and automatic focus control function. With reference to this, a conventional small camera including a conventional zoom and automatic focus control function will be described in more detail.

1 and 2, a conventional compact camera 6 including a zoom and autofocus control function includes an optical unit 60 and a housing 62 that accommodates the optical unit 60 so as to be movable in the optical axis direction. Includes. A magnet 61 is coupled to one side of the outer surface of the optical unit 60, and a coil 63 is disposed on one side of the housing 62 to face the magnet 61 to form one magnetic circuit. .

A driving force for zooming or automatic focusing is generated by the interaction between the coil 63 constituting the magnetic circuit and the magnet 61, and the optical unit 60 is moved in the optical axis direction with respect to the housing 62 by the generated driving force. A relative motion is performed, and a zoom function or an automatic focus control function is implemented as a displacement of the optical unit 60 in the optical axis direction with respect to the image sensor module 64 disposed under the housing 62 by this relative motion.

The image sensor module 64 senses an image from the light passing through the optical unit 60. The image sensor module 64 includes a substrate 65 and an image sensor 66 mounted on the substrate 65. The lower portion of the housing 62 to which the image sensor module 64 is coupled is open, and the image sensor module 64 from the lower portion of the housing 62 is in a form to completely block the lower surface of the opened housing 62. ) Is combined.

In FIGS. 1 and 2, reference numeral 68, which is not described, denotes a case that is coupled to an upper portion of the housing to form a component mounting space.

However, in a conventional camera in which the image sensor module is coupled at the lower portion of the housing in a structure that completely closes the lower surface of the housing, it is difficult to secure a space for arranging actuator components (magnetic circuits, optical units, etc.). This is because the component mounting space in the housing partitioned above the image sensor module is limited to the height limiting the thickness of the substrate.

In other words, conventional small cameras are structurally limited by the thickness of the substrate placed under the component mounting space in the housing to a limited height, making it difficult to secure the component mounting space, and thus, the specification of the optical unit is changed (for example, high-precision There is a problem in that it is difficult to expand the specifications of the magnetic circuit according to the case of mounting a larger number of optical lenses for shooting).

Korean Patent Publication No. 10-2018-0116965 (Publication date 2018.10.26)

The technical problem to be solved by the present invention is to provide a small camera having a configuration capable of utilizing a partial space occupied by a substrate of an image sensor module as a component arrangement space.

According to an embodiment of the present invention as a means of solving the problem,

An optical unit with a magnet coupled to the outer surface thereof;

A housing in which the optical unit is movably accommodated in an optical axis direction and a coil is disposed at a position corresponding to the magnet; And

Includes; an image sensor module mounted on the lower portion of the housing and having an image sensor mounted on the upper surface of the substrate,

The inside of the housing is composed of a first area on one side of the housing in which the coil is located and a second area other than the first area,

The first region has a lower portion closed and the second region has an open lower portion,

The substrate is formed to have a size corresponding to the lower opening of the second region and is coupled to the lower portion of the housing through the opening,

There is provided a small camera in which a lower opening of the second region with an open lower portion is stepped upward by a predetermined height from a lower closed portion of the first region with a lower portion blocked.

Here, the lower opening may be configured to be stepped upward by a height corresponding to the thickness of the substrate than the lower closing portion.

In addition, the optical unit includes a carrier installed inside the housing so as to allow linear movement in the optical axis direction and having a magnet mounting portion on one side, and a lens coupled to a receiving hole in the center of the carrier and accommodating a lens group consisting of a plurality of lenses. It can be configured as a barrel.

In addition, a magnetic circuit composed of a magnet and a coil may be positioned in the first region, and the lens barrel of the optical unit may be positioned in the second region.

In addition, a ball driving unit positioned in the first region and configured to guide a linear motion of the optical unit relative to the housing in the optical axis direction between the optical unit and the housing may be further included.

Preferably, the ball driving unit includes a pair of left and right first ball guides provided in the optical unit and having a ball groove in the optical axis direction, and a left and right one formed in a structure corresponding to the first ball guide inside the housing. It may include a pair of second ball guides, and two or more balls interposed between the first ball guide and the second ball guide so as to be aligned in the optical axis direction.

According to another embodiment of the present invention as a means of solving the problem,

An optical unit with a magnet coupled to the outer surface thereof;

A housing in which the optical unit is movably accommodated in an optical axis direction and a coil is disposed at a position corresponding to the magnet; And

Includes; an image sensor module mounted on the lower portion of the housing and having an image sensor mounted on the upper surface of the substrate,

The interior of the housing is composed of first and second corner regions formed on both sides of the coil, and a third region other than the first and second corner regions,

The first and second corner regions have a lower portion closed, and the third region has an open lower portion,

The substrate is formed to have a size corresponding to the lower opening of the third region and is coupled to the lower portion of the housing through the opening,

There is provided a small camera in which a lower opening of the third region with an open lower portion is stepped upward by a predetermined height from lower closed portions of the first and second corner regions with the lower portion blocked.

Here, the lower opening may be configured to be stepped upward by a height corresponding to the thickness of the substrate than the lower closing portion.

In addition, the optical unit includes a carrier installed inside the housing so as to allow linear movement in the optical axis direction and having a magnet mounting portion on one side, and a lens coupled to a receiving hole in the center of the carrier and accommodating a lens group consisting of a plurality of lenses. It can be configured as a barrel.

In addition, a magnetic circuit composed of a magnet and a coil and the lens barrel of the optical unit are located in a third area, and a straight line in the optical axis direction of the optical unit relative to the housing between the optical unit and the housing in the first and second corner areas It may be configured to locate the ball driving unit that guides the movement.

Preferably, the ball driving unit includes a pair of left and right first ball guides provided in the optical unit and having a ball groove in the optical axis direction, and a left and right one formed in a structure corresponding to the first ball guide inside the housing. It may include a pair of second ball guides, and two or more balls interposed between the first ball guide and the second ball guide so as to be aligned in the optical axis direction.

According to the small camera according to an embodiment of the present invention, a part of the lower end of the housing is configured to be stepped to a height corresponding to the thickness of the substrate, and the substrate is closed only a part of the lower surface of the lower jing through the stepped part. Accordingly, the remaining area except for the portion where the substrate is disposed, that is, a portion of the lower portion of the housing where the substrate is not disposed (a portion that is not blocked by the substrate) can be used as a component mounting space.

In conventional small cameras, structurally, the component mounting space in the housing is limited to a limited height by the thickness of the substrate disposed below, making it difficult to secure the component mounting space, and accordingly, the specifications of the optical unit are changed (for example, high-precision shooting In the case of mounting a larger number of optical lenses for the purpose), it is difficult to change the specifications of the magnetic circuit accordingly.

On the other hand, the present invention is configured to secure an area occupied by a part of a substrate as a space in the prior art and utilize it as a component mounting space, thereby solving the difficulties in securing a component mounting space, which has been a problem in the prior art, It is possible to easily change the specifications of the magnetic circuit to meet the demand for increased driving power due to the change in the specifications of the optical unit without changing the camera size.

1 is an exploded perspective view of a small camera including a conventional zoom and auto focus control function.
Figure 2 is a side view of the small camera shown in Figure 1;
3 is an exploded perspective view of a small camera according to an embodiment of the present invention.
Figure 4 is a side view of the small camera shown in Figure 3;
5 is a perspective view of the housing shown in FIG. 3 as viewed from the bottom.
6 is a view showing a comparison between a conventional small camera and a magnetic circuit of a small camera according to an embodiment of the present invention.
7 is an exploded perspective view of a small camera according to another embodiment of the present invention.
8 is a front view of the small camera shown in FIG. 7.
9 is a perspective view of the housing shown in FIG. 7 as viewed from the bottom.
10 is a view showing a comparison of a conventional small camera and a ball driving unit of a small camera according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail.

The terms used in the specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features or It is to be understood that the presence or addition of numbers, steps, actions, components, parts, or combinations thereof does not preclude the possibility of preliminary exclusion.

In addition, terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

In addition, terms such as "... unit", "... unit", "... module" described in the specification mean a unit that processes at least one function or operation, which can be implemented by hardware or software or a combination of hardware and software. I can.

In the description with reference to the accompanying drawings, the same drawing reference numerals are assigned to the same components, and redundant descriptions thereof will be omitted. In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

3 is an exploded perspective view of a small camera according to an embodiment of the present invention, and FIG. 4 is a side view of the small camera shown in FIG. 3. And FIG. 5 is a perspective view of the housing shown in FIG. 3 as viewed from the bottom.

3 to 5, a small camera 1 according to an embodiment of the present invention includes an optical unit 10, a housing 16 accommodating the optical unit 10, and a lower portion of the housing 16. Includes an image sensor module 18 mounted on. A magnet (M) is coupled to an outer surface of the optical unit (10), and a coil (C) is disposed on the housing 16 at a position corresponding to the magnet (M) so as to face the magnet (M).

The magnets M and the coils C corresponding to each other constitute a magnetic circuit 15 for generating a driving force for zoom or auto focus. The coil C may be mounted on or electrically connected to the flexible circuit board 180 (not shown) configured to surround a part of the outer surface of the housing 16, and the coil is supplied with power from the flexible circuit board 180. The driving force is generated by the interaction of the electric field generated by (C) and the magnetic field of the magnet (M).

The optical unit 10 to which the magnet M is coupled is installed in the housing 16 so as to be movable in the optical axis direction. Accordingly, the optical unit 10 makes a relative movement in the optical axis direction within the housing 16 by the driving force generated by the magnetic circuit 15, and is placed under the housing 16 due to the relative movement of the optical unit 10. Zoom or automatic focus control is implemented by adjusting the separation distance from the image sensor module 18 to be used.

The optical unit 10 preferably includes a carrier 12 and a lens barrel 11. The carrier 12 is installed inside the housing 16 to enable linear movement in the optical axis direction, and has a magnet mounting portion 122 on one side to which the magnet M is coupled, and the lens barrel 11 includes the carrier 12 It is coupled to the central receiving hole 120 and accommodates a lens group consisting of a plurality of lenses. Here, each of the lenses may have optical characteristics such as the same or different focal length and refractive index.

The image sensor module 18 senses an image from the light passing through the optical unit 10. The image sensor module 18 includes a substrate 180 and an image sensor 182 mounted on the substrate 180, and is disposed under the housing 16. The substrate 180 constituting the image sensor module 18 may be installed in a structure in which the lower portion of the open lower portion is covered from the lower portion of a specific area of the housing 16 with an open lower portion.

The inside of the housing 16 may include a first region 160 on one side of the housing 16 in which the coil C is located and a second region 162 other than the first region 160. The lower portion of the first region 160 is closed and the lower portion of the second region 162 is open, and the substrate 180 constituting the image sensor module 18 is a lower opening of the second region 162 It is formed in a size corresponding to the size of 164 and may be coupled under the housing 16 in a form that completely blocks the opening 164.

As illustrated in the drawing, the lower opening 164 of the second region 162 with an open lower part is stepped upward by a predetermined height from the lower closing part 161 of the first region 160 with the lower part closed. Can be configured. Preferably, the lower opening 164 of the second region 162 is stepped upward by a height corresponding to the thickness of the substrate 180 more accurately than the lower closing part 161 of the first region 160 Can be.

With this configuration, as shown in FIG. 4, in the combined state, the lower surface of the substrate 180 constituting the image sensor module 18 and the lowermost end of the lower closing portion 161 of the first region 160 are the same. The bottom surface is formed in a structure aligned on a plane, and since the substrate 180 is not disposed under the first region 160, an additional space corresponding to the thickness of the substrate 180 can be created. Can be utilized.

The above-described magnetic circuit 15 including a magnet M and a coil C may be positioned in the first region 160 of the housing 16 in which the substrate 180 is not disposed below. In addition, the lens barrel 11 of the optical unit 10 may be located in the second region 162 where the substrate 180 is disposed below.

In the first region 160, a ball driving unit 19 for guiding a linear motion of the optical unit 10 in the optical axis direction with respect to the housing 16 between the optical unit 10 and the housing 16 may be positioned. have.

The ball driving unit 19 includes two or more balls 192 interposed between the first ball guide 190 and the second ball guide 194 and the first and second ball guides 194 to be aligned in the optical axis direction. . The first ball guide 190 may be provided in a pair of left and right on both sides of the magnet mounting portion 122 and may have a configuration in which a ball groove is formed on each side in the optical axis direction, and the second ball guide 194 includes a first area 160 ) May be formed in a structure corresponding to the pair of first ball guides 190 on the inner side of the housing 16.

According to the small camera according to an embodiment of the present invention having such a configuration, a lower part of the housing 16 is configured to be stepped to a height corresponding to the thickness of the substrate 180, and the lower surface of the lower jing through the stepped portion Only part of the substrate 180 is configured to be closed. Accordingly, the remaining area except for the portion where the substrate 180 is disposed, that is, a portion of the lower portion of the housing 16 where the substrate 180 is not disposed, may be increased by the thickness of the substrate 180 to be used as a component mounting space.

In FIGS. 3 and 4, reference numeral 13, which is not described, denotes a case that is coupled to an upper portion of the housing to form a component mounting space.

The effect of the present invention will be described in more detail through contrast with the conventional configuration.

FIG. 6 is a view showing a comparison between a conventional small camera and a magnetic circuit part of a small camera according to an embodiment of the present invention, and FIG. 6A is a cross-sectional view of the conventional small camera shown in FIG. 6B is a cross-sectional view of a magnetic circuit part of the small camera according to the exemplary embodiment shown in FIG. 4 as viewed from the line BB.

The conventional small camera as shown in FIG. 6A is structurally limited to a height limiting the thickness of the substrate on which the magnetic circuit mounting space in the housing is disposed below. Accordingly, unless the camera size is increased, the specifications of the magnetic circuit are expanded in accordance with the specifications of the optical unit (e.g., when a larger number of optical lenses are mounted for high-precision shooting) (to increase the size of the coil and magnet (not shown)). Things) difficult to do.

On the other hand, in the present invention as shown in (b) of FIG. 6, since the substrate is not disposed under the first region in which the magnetic circuit is mounted, the thickness of the substrate can be further increased and used as a component mounting space. That is, even with the same size (H1 = H2), the magnetic circuit mounting space can be secured larger than that of the conventional configuration, and accordingly, the magnetic circuit can be configured to be larger in accordance with the demand for increasing driving force according to the specification change of the optical unit.

7 is an exploded perspective view of a small camera according to another embodiment of the present invention, and FIG. 8 is a front view of the small camera shown in FIG. 7. And FIG. 9 is a perspective view of the housing shown in FIG. 7 as viewed from the bottom.

Hereinafter, in describing another embodiment of the present invention, the same components as those of the above-described embodiment will be described with the same reference numerals.

7 to 9, a compact camera 1 according to another embodiment of the present invention includes an optical unit 10, a housing 16' accommodating the optical unit 10, and a housing 16'. It includes an image sensor module 18 mounted on the lower portion of the. A magnet (M) is coupled to an outer surface of the optical unit (10), and a coil (C) is disposed on the housing 16 at a position corresponding to the magnet (M) so as to face the magnet (M).

The magnets M and the coils C corresponding to each other constitute a magnetic circuit 15 for generating a driving force for zoom or auto focus. The coil C may be mounted on or electrically connected to the flexible circuit board 180 configured to surround a part of the outer surface of the housing 16, and the coil C is supplied with power from the flexible circuit board 180. The driving force is generated by the interaction of the generated electric field and the magnetic field of the magnet (M).

The optical unit 10 to which the magnet M is coupled is installed in the housing 16 so as to be movable in the optical axis direction. Accordingly, the optical unit 10 makes a relative motion in the optical axis direction within the housing 16 by the driving force generated by the magnetic circuit 15, and the image sensor module disposed under the housing 16 through this relative motion ( 18) By changing the position of the optical unit 10, zoom or automatic focus control is implemented.

The optical unit 10 preferably includes a carrier 12 and a lens barrel 11. The carrier 12 is installed inside the housing 16 so as to be able to move linearly in the optical axis direction, and includes a magnet mounting portion 122 to which the magnet M is coupled to one side. In addition, the lens barrel 11 is coupled to the receiving hole 120 in the center of the carrier 12 and accommodates a lens group composed of a plurality of lenses. Each of the lenses may have optical properties such as the same or different focal length and refractive index.

The image sensor module 18 senses an image from the light passing through the optical unit 10. The image sensor module 18 includes a substrate 180 and an image sensor 182 mounted on the substrate 180, and is disposed under the housing 16. The substrate 180 constituting the image sensor module 18 may be installed in a structure in which the lower portion of the open lower portion is covered from the lower portion of a specific area of the housing 16 with an open lower portion.

The inside of the housing 16 is the third area 168 except for the first and second corner areas 165a and 165b on both sides of the coil C, and the first and second corner areas 165a and 165b. It can be composed of. The first and second corner regions 165a and 165b have a closed lower portion, and the third region 168 has an open lower portion, and the substrate 180 of the image sensor module 18 is It is formed in a size corresponding to the lower opening 169 to completely block the opening 169 and may be coupled under the housing 16.

As illustrated in the drawing, the lower opening 169 of the third region 168 with an open lower portion is smaller than the lower closing portion 161 of the first and second corner regions 165a and 165b whose lower portions are closed. It can be configured to be stepped upward by the height of. Preferably, the lower opening 169 of the third region 168 corresponds to the thickness of the substrate 180 more accurately than the lower closing portions 166a and 166b of the first and second corner regions 165a and 165b. It can be configured to be stepped upwards as high as possible.

According to this configuration, the small camera according to another embodiment of the present invention, as shown in FIG. 8, is provided with the lower surface of the substrate 180 constituting the image sensor module 18 and the first and second corners in the coupled state. The lowermost ends of the lower closing portions 166a and 166b of the regions 165a and 165b are arranged on the same plane to form a bottom surface, and the substrate 180 is located under the first and second corner regions 165a and 165b. Since this is not arranged, the thickness can be created as an additional space.

The ball driver 19 is disposed in the first and second corner regions 165a and 165b of the housing 16 in which the substrate 180 is not disposed below. The ball driving unit 19 guides a linear motion of the optical unit 10 with respect to the housing 16 in the optical axis direction between the optical unit 10 and the housing 16. In addition, in the third area 168 where the substrate 180 is disposed below, the remaining components except for the ball driving unit 19, for example, a magnetic circuit 15 composed of a magnet (M) and a coil (C), and an optical unit 10 The back may be located.

The ball driving unit 19 includes two or more balls 192 interposed between the first ball guide 190 and the second ball guide 194 and the first and second ball guides 190 and 194 so as to be aligned in the optical axis direction. Include. The first ball guide 190 may be provided in a pair of left and right on both sides of the magnet mounting portion 122 and may have a configuration in which a ball groove is formed on each side in the optical axis direction, and the second ball guide 194 includes a first area 160 ) May be formed in a structure corresponding to the pair of first ball guides 190 on the inner side of the housing 16.

In another embodiment of the present invention having such a configuration, a portion of the lower end of the housing 16 is configured to be stepped at a height corresponding to the thickness of the substrate 180, and only a portion of the lower surface of the lower ring is formed through the stepped portion. ) Is configured to be closed. Accordingly, the remaining area except for the portion where the substrate 180 is disposed, that is, a portion of the lower portion of the housing 16 where the substrate 180 is not disposed, may be increased by the thickness of the substrate 180 to be used as a component mounting space.

7 and 8, reference numeral 13, which is not described, denotes a case that is coupled to the upper portion of the housing to form a component mounting space.

The effect of the present invention will be described in more detail through contrast with the conventional configuration.

FIG. 10 is a view showing a comparison between a conventional small camera and a ball driving unit of a small camera according to another embodiment of the present invention, and FIG. 10A is a cross-sectional view of a ball driving unit of a conventional small camera, and FIG. 10B is A cross-sectional view of a ball driving part of a small camera according to another embodiment of the present invention.

The conventional small camera as shown in FIG. 10A is structurally limited to a height limiting the thickness of the substrate in which the ball driving unit mounting space in the housing is disposed below. Accordingly, unless the camera size is increased, the distance between the balls in the ball driving unit is narrow and the ball pitch is small, so that the ball rolling property is not good, noise is generated, and the design freedom is low.

On the other hand, in the present invention as shown in (b) of FIG. 10, since there is no substrate under the first and second corner regions where the pair of ball guides are located, the thickness of the substrate can be utilized as a mounting space for the ball driving unit. That is, even with the same size, it is possible to secure a larger mounting space for the ball driving unit compared to the conventional configuration, thereby improving design freedom, and increasing the ball pitch sufficiently to improve ball rolling and noise problems.

In the above detailed description of the present invention, only specific embodiments according thereto have been described. However, it should be understood that the present invention is not limited to a particular form mentioned in the detailed description, but rather, it is understood to include all modifications, equivalents, and substitutes within the spirit and scope of the present invention as defined by the appended claims. Should be.

1: camera
10: optical unit
11: Lens barrel
12: carrier
13: case
15: magnetic circuit
16, 16': housing
18: image sensor module
19: ball drive unit
160: first area
161, 166a, 166b: lower closure
162: second area
164, 169: bottom opening
165a, 165b: first and second corner regions
168: third area
180: substrate
182: image sensor
190: first ball guide
192: ball
194: second ball guide
M: Magnet
C: coil

Claims (11)

An optical unit with a magnet coupled to the outer surface thereof;
A housing in which the optical unit is movably accommodated in an optical axis direction and a coil is disposed at a position corresponding to the magnet; And
Includes; an image sensor module mounted on the lower portion of the housing and having an image sensor mounted on the upper surface of the substrate,
The inside of the housing is composed of a first area on one side of the housing in which the coil is located and a second area other than the first area,
The first region has a lower portion closed and the second region has an open lower portion,
The substrate is formed to have a size corresponding to the lower opening of the second region and is coupled to the lower portion of the housing through the opening,
A small camera configured such that a lower opening of the second region with an open lower portion is stepped upward by a predetermined height from a lower closed portion of the first region with a lower portion closed.
The method of claim 1,
A small camera in which the lower opening is stepped upward by a height corresponding to the thickness of the substrate than the lower closing portion.
The method of claim 1,
The optical unit,
A carrier installed inside the housing to enable linear motion in the optical axis direction and having a magnet mounting portion on one side thereof;
A small camera coupled to the receiving hole in the center of the carrier and configured as a lens barrel for accommodating a lens group consisting of a plurality of lenses.
The method of claim 3,
A magnetic circuit composed of a magnet and a coil is located in the first area,
A small camera in which the lens barrel of an optical unit is located in a second area.
The method of claim 1,
A ball driving unit positioned in the first area and configured to guide linear motion of the optical unit with respect to the housing in the optical axis direction between the optical unit and the housing.
The method of claim 5,
The ball driving unit,
A pair of left and right first ball guides provided in the optical unit and having ball grooves formed in the optical axis direction,
A pair of left and right second ball guides formed in a structure corresponding to the first ball guide inside the housing,
A small camera comprising two or more balls interposed between the first ball guide and the second ball guide so as to be aligned in the optical axis direction.
An optical unit with a magnet coupled to the outer surface thereof;
A housing in which the optical unit is movably accommodated in an optical axis direction and a coil is disposed at a position corresponding to the magnet; And
Includes; an image sensor module mounted on the lower portion of the housing and having an image sensor mounted on the upper surface of the substrate,
The interior of the housing is composed of first and second corner regions formed on both sides of the coil, and a third region other than the first and second corner regions,
The first and second corner regions have a lower portion closed, and the third region has an open lower portion,
The substrate is formed to have a size corresponding to the lower opening of the third region and is coupled to the lower portion of the housing through the opening,
A small camera configured such that a lower opening of the third region with an open lower portion is stepped upward by a predetermined height from lower closed portions of the first and second corner regions with a lower portion blocked.
The method of claim 7,
A small camera in which the lower opening is stepped upward by a height corresponding to the thickness of the substrate than the lower closing portion.
The method of claim 7,
The optical unit,
A carrier installed inside the housing to enable linear motion in the optical axis direction and having a magnet mounting portion on one side thereof;
A small camera coupled to the receiving hole in the center of the carrier and configured as a lens barrel for accommodating a lens group consisting of a plurality of lenses.
The method of claim 9,
The lens barrel of the optical unit and a magnetic circuit composed of a magnet and a coil are located in a third area,
A small camera having a ball driving unit positioned between the optical unit and the housing in the first and second corner regions to guide linear motion of the optical unit with respect to the housing in the optical axis direction.
The method of claim 10,
The ball driving unit,
A pair of left and right first ball guides provided in the optical unit and having ball grooves formed in the optical axis direction,
A pair of left and right second ball guides formed in a structure corresponding to the first ball guide inside the housing,
A small camera comprising two or more balls interposed between the first ball guide and the second ball guide so as to be aligned in the optical axis direction.

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