KR20240115079A - Camera actuator and camera module comprising the same - Google Patents

Abstract

Embodiments of the present invention include a housing; a first lens assembly moving in the optical axis direction within the housing; a driving unit that moves the first lens assembly; a first guide portion facing the first lens assembly in the housing; and a ball disposed between the first guide portion and the first lens assembly, wherein the first guide portion includes a first guide groove in which the ball rests and a ball that overlaps the first guide groove in the optical axis direction. Disclosed is a camera actuator including a guide base including a base groove.

Description

Camera actuator and camera module including the same {CAMERA ACTUATOR AND CAMERA MODULE COMPRISING THE SAME}

The present invention relates to a camera actuator and a camera module including the same.

A camera is a device that takes photos or videos of a subject, and is mounted on portable devices, drones, vehicles, etc. To improve image quality, the camera module has an Image Stabilization (IS) function that corrects or prevents image shaking caused by the user's movement, and automatically adjusts the gap between the image sensor and lens to align the focal length of the lens. It can have an auto focusing (AF) function and a zooming function that increases or decreases the magnification of a distant subject through a zoom lens.

However, there is a problem that the reliability of the camera actuator deteriorates due to the long movement of the lens within the camera module, and structural deformation occurs due to parts applied during assembly.

The technical problem to be solved by the embodiment of the present invention is to provide a camera actuator and camera module with improved driving performance by minimizing structural deformation that occurs during assembly by adjusting the position of the base groove of the guide base.

Additionally, embodiments of the present invention can provide a camera actuator and camera module with improved dimensional accuracy and driving accuracy by minimizing issues that occur during assembly through the shape of the guide portion.

An embodiment of the present invention provides a camera actuator applicable to ultra-slim, ultra-small and high-resolution cameras.

The problem to be solved in the embodiment is not limited to this, and also includes purposes and effects that can be understood from the means of solving the problem or the embodiment described below.

A camera actuator according to an embodiment of the present invention includes a housing; a first lens assembly moving in the optical axis direction within the housing; a driving unit that moves the first lens assembly; a first guide portion disposed in the housing and facing the first lens assembly; and a ball disposed between the first guide part and the first lens assembly, wherein the first guide part is located at the edge of the first guide groove and the first guide part where the ball rests, and the first guide part is located at the edge of the first guide part where the ball rests. It includes a guide base including a guide groove and a base groove overlapping in the optical axis direction.

The first guide portion includes a first extension portion extending from one end of the guide base to one side; and a second extension part extending from the other end of the guide base to the one side.

The first extension part and the second extension part may overlap the base groove in a direction perpendicular to the optical axis direction.

The guide base may include a guide hole, and the driving unit may include a coil disposed in the guide hole.

The guide hole may overlap the first guide groove in a direction perpendicular to the optical axis.

The base groove may include a first base groove disposed to be spaced apart in the direction of the optical axis and a second base groove disposed on the other side.

The first base groove and the second base groove may overlap the first guide groove in the optical axis direction.

The length of the first base groove in the optical axis direction may be greater than the length of the second base groove in the optical axis direction.

The first base groove may be spaced apart from the first guide groove in the optical axis direction.

The first guide groove may be open toward the second base groove.

The depth of the first base groove in a direction perpendicular to the optical axis may be smaller than the depth of the first guide groove in a direction perpendicular to the optical axis.

The first guide portion includes a first area overlapping the base groove in the optical axis direction; and a second area overlapping the first extension part and the second extension part in the optical axis direction.

The driving unit includes a magnet disposed in the first area; and a coil disposed in the second area.

The second extension may include a base coupling portion.

The housing may be in contact with the base groove.

According to an embodiment of the present invention, the technical problem to be solved is to implement a camera actuator and camera module with improved driving performance by minimizing structural deformation that occurs during assembly by adjusting the position of the base groove of the guide base.

In addition, embodiments of the present invention can implement camera actuators and camera modules with improved dimensional accuracy and driving accuracy by minimizing issues that occur during assembly through the shape of the guide portion.

Additionally, embodiments of the present invention can implement a camera actuator and camera module with improved reliability by using an additional sub ball.

Embodiments of the present invention can implement a camera actuator applicable to ultra-slim, ultra-small and high-resolution cameras.

The various and beneficial advantages and effects of the present invention are not limited to the above-described content, and may be more easily understood through description of specific embodiments of the present invention.

1 is a perspective view of a camera module according to an embodiment,
Figure 2 is an exploded perspective view of a camera module according to an embodiment,
Figure 3 is a view viewed from AA' in Figure 1,
4 is a perspective view of a second camera actuator according to an embodiment;
5 is an exploded perspective view of a second camera actuator according to an embodiment;
Figure 6 is a cross-sectional view taken along line DD' in Figure 4,
7 and 8 are diagrams explaining each operation of the lens assembly according to an embodiment,
9 is a diagram explaining the operation of the second camera actuator according to the embodiment;
10 is a perspective view of a first lens assembly, a first bonding member, a second bonding member, and a second lens assembly according to an embodiment;
Figure 11 is a perspective view showing a first guide unit according to an embodiment;
Figure 12 is a side view showing a first guide unit according to an embodiment;
Figure 13 is a view taken along line GG' in Figure 12,
Figure 14 is a view taken along line HH' in Figure 12;
Figure 15 is another side view showing a first guide unit according to an embodiment.
Figure 16 is another perspective view showing a first guide unit according to an embodiment.
Figure 17 is another side view showing a first guide unit according to an embodiment.
18 is an internal perspective view of a second camera actuator according to an embodiment;
Figure 19 is a view taken along line II in Figure 4,
20 is a plan view of a second camera actuator according to an embodiment;
Figure 21 is a perspective view and a partially enlarged view of a second camera actuator according to an embodiment;
Figure 22 is an enlarged view of the rear end of the second camera actuator according to the embodiment;
Figure 23 is a schematic diagram showing a circuit board according to an embodiment.
Figure 24 is a perspective view of a mobile terminal to which a camera module is applied according to an embodiment;
Figure 25 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as second, first, etc., may be used to describe various components, but the components are not limited by the terms. Terms are used only to distinguish one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, the embodiment will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of the reference numerals, and duplicate descriptions thereof will be omitted.

Figure 1 is a perspective view of a camera module according to an embodiment, Figure 2 is an exploded perspective view of a camera module according to an embodiment, and Figure 3 is a view viewed from AA' in Figure 1.

Referring to FIGS. 1 and 2 , the camera module 1000 according to the embodiment may include a cover (CV), a first camera actuator 1100, a second camera actuator 1200, and a circuit board 1300. . Here, the first camera actuator 1100 may be used interchangeably as the first actuator, and the second camera actuator 1200 may be used interchangeably as the second actuator.

The cover CV may cover the first camera actuator 1100 and the second camera actuator 1200. The coupling force between the first camera actuator 1100 and the second camera actuator 1200 can be improved by the cover CV.

Furthermore, the cover CV may be made of a material that blocks electromagnetic waves. Accordingly, the first camera actuator 1100 and the second camera actuator 1200 within the cover CV can be easily protected.

And the first camera actuator 1100 may be an Optical Image Stabilizer (OIS) actuator. For example, the first camera actuator 1100 may move the optical member in a direction perpendicular to the optical axis (axis of incident light).

The first camera actuator 1100 may include a fixed focal length lens disposed in a predetermined barrel (not shown). A fixed focal length lens may also be called a “single focal length lens” or “single lens.”

The first camera actuator 1100 can change the path of light. In an embodiment, the first camera actuator 1100 may vertically change the optical path through an internal optical member (eg, a prism or mirror). For example, the optical member may change light from the first direction (X-axis direction) to the third direction (Z-axis direction). Alternatively, the optical member may change light from the first axis to the second axis. With this configuration, even if the thickness of the mobile terminal is reduced, a lens configuration larger than the thickness of the mobile terminal is placed within the mobile terminal through a change in the optical path, so that magnification, auto focusing (AF), zoom, and OIS functions can be performed. You can.

However, it is not limited to this and the first camera actuator 1100 can change the optical path multiple times vertically or at a predetermined angle.

The second camera actuator 1200 may be placed behind the first camera actuator 1100. The second camera actuator 1200 may be combined with the first camera actuator 1100. And mutual bonding can be achieved in various ways.

Additionally, the second camera actuator 1200 may be a zoom actuator or an auto focus (AF) actuator. For example, the second camera actuator 1200 supports one or more lenses and can perform an auto-focusing function or a zooming function by moving the lenses according to a control signal from a predetermined control unit.

And one or more lenses move independently or individually along the optical axis direction to

The circuit board 1300 may be placed behind the second camera actuator 1200. The circuit board 1300 may be electrically connected to the second camera actuator 1200 and the first camera actuator 1100. Additionally, there may be a plurality of circuit boards 1300.

A camera module according to an embodiment may be composed of a single or multiple camera modules. For example, the plurality of camera modules may include a first camera module and a second camera module.

And the first camera module may include a single or multiple actuators. For example, the first camera module may include a first camera actuator 1100 and a second camera actuator 1200.

Additionally, the second camera module may be placed in a predetermined housing (not shown) and may include an actuator (not shown) capable of driving the lens unit. The actuator may be a voice coil motor, micro actuator, silicon actuator, etc., and may be applied in various ways such as electrostatic method, thermal method, bimorph method, and electrostatic force method, but is not limited thereto. Additionally, in this specification, the camera actuator may be referred to as an actuator, etc. Additionally, a camera module consisting of a plurality of camera modules can be mounted in various electronic devices such as mobile terminals. Furthermore, an actuator may be a device that moves or tilts a lens or optical member. However, hereinafter, the actuator will be described as including a lens or optical member. Furthermore, the actuator may be called a ‘lens transfer device’, ‘lens transfer device’, ‘optical member transfer device’, ‘optical member transfer device’, etc.

Referring to FIG. 3, the camera module according to the embodiment may include a first camera actuator 1100 performing an OIS function, and a second camera actuator 1200 performing a zooming function and an AF function.

Light may be incident into the camera module or the first camera actuator through an opening area located on the upper surface of the first camera actuator 1100. That is, light is primarily incident into the interior of the first camera actuator 1100 along a vertical direction (e.g., can be changed. Then, the light may pass through the second camera actuator 1200 and be incident on the image sensor IS located at one end of the second camera actuator 1200 (PATH). In this specification, the Z-axis direction or the third direction is described as the optical axis direction as follows. Additionally, the first direction, the X-axis direction, will be described as a vertical direction. And the second direction, the Y-axis direction, is described as the horizontal direction.

In this specification, the bottom refers to one side in the first direction. And the first direction is the X-axis direction in the drawing and can be used interchangeably with the second axis direction. The second direction is the Y-axis direction in the drawing and can be used interchangeably with the first axis direction. The second direction is perpendicular to the first direction. Additionally, the third direction is the Z-axis direction in the drawing, and may be used interchangeably with the third axis direction. And the third direction is a direction perpendicular to both the first and second directions. Here, the third direction (Z-axis direction) corresponds to the direction of the optical axis, and the first direction (X-axis direction) and the second direction (Y-axis direction) are directions perpendicular to the optical axis. In addition, in the description of the first and second camera actuators below, the optical axis direction is the third direction (Z-axis direction), and the description below will be based on this.

Additionally, in this specification, the inside may be a direction from the cover CV toward the first camera actuator, and the outside may be a direction opposite to the inside. That is, the first camera actuator and the second camera actuator may be located inside the cover (CV), and the cover (CV) may be located outside the first camera actuator or the second camera actuator.

And by this configuration, the camera module according to the embodiment can change the path of light to improve the spatial limitations of the first camera actuator and the second camera actuator. That is, the camera module according to the embodiment can expand the optical path while minimizing the thickness of the camera module in response to a change in the optical path. Furthermore, it should be understood that the second camera actuator may provide a high range of magnification by controlling focus, etc. in an extended optical path.

In addition, the camera module according to the embodiment can implement OIS through control of the optical path through the first camera actuator, thereby minimizing the occurrence of decenter or tilt phenomenon and providing the best optical characteristics. I can pay it.

Furthermore, the second camera actuator 1200 may include an optical system and a lens driving unit. For example, the second camera actuator 1200 may include at least one of a first lens assembly, a second lens assembly, and a third lens assembly.

also. The second camera actuator 1200 is equipped with a coil and a magnet and can perform a high-magnification zooming function and an autofocus function.

For example, the first lens assembly and the second lens assembly may be moving lenses that move through a coil, magnet, and guide pin, and the third lens assembly may be a fixed lens, but the lens assembly is not limited thereto. For example, the third lens assembly may function as a focator to image light at a specific location, and the first lens assembly may function to reimage the image formed in the third lens assembly, which is the condenser, at another location. It can perform a variator function. Meanwhile, in the first lens assembly, the distance to the subject or the image distance may change significantly, resulting in a large change in magnification, and the first lens assembly, which is a variable magnification, may play an important role in changing the focal length or magnification of the optical system. Meanwhile, the point where an image is formed in the first lens assembly, which is a variable sensor, may differ slightly depending on the location. Accordingly, the second lens assembly can perform a position compensation function for the image formed by the inverter. For example, the second lens assembly may perform a compensator function to accurately image an image imaged by the first lens assembly, which is a variable sensor, at the actual image sensor position. For example, the first lens assembly and the second lens assembly may be driven by electromagnetic force caused by interaction between a coil and a magnet. The above description can be applied to the lens assembly described later. Additionally, the first to third lens assemblies may move along the optical axis direction, that is, the third direction. Additionally, the first to third lens assemblies may move in the third direction independently or dependent on each other. In the present invention, the first lens assembly and the second lens assembly can move along the optical axis direction. And the third lens assembly may be located at the front end of the first lens assembly or at the rear end of the second lens assembly. And the third lens assembly may not move in the optical axis direction. That is, the third lens assembly may be a fixing unit. Additionally, the first and second lens assemblies may be moving parts.

Meanwhile, when the OIS actuator and the AF/Zoom actuator are arranged according to an embodiment of the present invention, magnetic field interference with the AF/Zoom magnet can be prevented when OIS is driven. Since the first driving magnet of the first camera actuator 1100 is disposed separately from the second camera actuator 1200, magnetic field interference between the first camera actuator 1100 and the second camera actuator 1200 can be prevented. In this specification, OIS may be used interchangeably with terms such as hand shake correction, optical image stabilization, optical image correction, and shake correction.

In particular, in the first camera actuator 1100, the optical member RM may be tilted along the X-axis or tilted along the Y-axis. Accordingly, the optical path can be easily changed according to the X-axis tilt or Y-axis tilt.

The optical member RM may be seated on a holder of the first camera actuator. In an embodiment, the optical member RM may be made of a mirror or prism. Hereinafter, a prism is shown, but as in the above-described embodiment, it may be composed of a plurality of lenses. Alternatively, the optical member RM may be composed of a plurality of lenses, prisms, or mirrors. And the optical member RM may include a reflection portion disposed therein. However, it is not limited to this.

By driving a VCM or the like in the first camera actuator 1100, the optical member RM may be tilted along the X-axis or tilted along the Y-axis. That is, OIS may be implemented while the optical member RM is tilted or rotated based on the Y-axis direction or the X-axis direction.

Figure 4 is a perspective view of a second camera actuator according to an embodiment, Figure 5 is an exploded perspective view of a second camera actuator according to an embodiment, Figure 6 is a cross-sectional view taken along line DD' in Figure 4, and Figures 7 and 8 is a diagram explaining the operation of each lens assembly according to an embodiment, and FIG. 9 is a diagram explaining the operation of the second camera actuator according to the embodiment.

Referring to FIGS. 4 to 6, the second camera actuator 1200 (or camera device or zoom lens transfer device or zoom lens movement device or lens transfer device) according to the embodiment includes a lens unit 1220, a housing 1230, and a driving unit. It may include (1250), a base portion (1260), a substrate portion (1270), and stoppers (ST1, ST2). Furthermore, the second camera actuator 1200 may further include a shield can (not shown), an elastic part (not shown), and a joining member (not shown).

Additionally, as will be described later, the lens group may move along the optical axis direction. Additionally, the lens group can be combined with the lens assembly and move together along the optical axis direction. At this time, the second camera actuator may include a moving part that moves in the optical axis direction like the lens group, and a fixed part that is relatively fixed and does not move along the optical axis direction, unlike the moving part. In this embodiment, the moving unit may include a lens assembly (eg, first and second lens assemblies) and an optical driving magnet (first and second driving magnets). And the fixing part may include a housing, a substrate part, an optical drive coil (first and second coils), and a Hall sensor. Furthermore, a driving magnet may be placed on either the moving part or the fixed part, and a driving coil may be placed on the other part. The moving distance of the lens assembly, which will be described later in response to this description, may correspond to the moving distance of the moving unit.

The shield can (not shown) is located in one area (e.g., the outermost) of the second camera actuator 1200 and uses components described later (lens unit 1220, housing 1230, drive unit 1250, and base). It may be positioned to surround the unit 1260, the substrate unit 1270, and the image sensor (IS) disposed on the circuit board at the rear end.

This shield can (not shown) can block or reduce electromagnetic waves generated from the outside. Accordingly, the occurrence of malfunctions in the driving unit 1250 may be reduced.

The lens unit 1220 may be located within a shield can (not shown). The lens unit 1220 may move along a third direction (Z-axis direction or optical axis direction). Accordingly, the above-described AF function or zoom function can be performed.

Additionally, the lens unit 1220 may be located within the housing 1230. Accordingly, at least a portion of the lens unit 1220 may move along the optical axis direction or the third direction (Z-axis direction) within the housing 1230.

Specifically, the lens unit 1220 may include a lens group 1221 and a moving assembly 1222.

First, the lens group 1221 may include at least one lens. Additionally, there may be a plurality of lens groups 1221, but the description below will be based on one lens group.

The lens group 1221 is coupled to the moving assembly 1222 and moves in the third direction (Z-axis direction) by electromagnetic force generated from the first magnet 1252a and the second magnet 1252b coupled to the moving assembly 1222. You can.

In an embodiment, the lens group 1221 may include a first lens group 1221a, a second lens group 1221b, and a third lens group 1221c. The first lens group 1221a, the second lens group 1221b, and the third lens group 1221c may be sequentially arranged along the optical axis direction. Furthermore, the lens group 1221 may further include a fourth lens group. The fourth lens group may be disposed behind the third lens group 1221c.

The first lens group 1221a may be fixed by combining with the 2-1 housing (or fixing assembly). In other words, the first lens group 1221a may not move along the optical axis direction.

The second lens group 1221b can be combined with the first lens assembly 1222a and move in the third direction or the optical direction. Magnification adjustment may be performed by moving the first lens assembly 1222a and the second lens group 1221b.

The third lens group 1221c can be combined with the second lens assembly 1222b and move in the third direction or the optical axis direction. Focus adjustment or auto focusing may be performed by moving the third lens group 1221.

However, the number of lens groups is not limited, and the above-described fourth lens group may not be present, or additional lens groups other than the fourth lens group 1121d may be disposed.

The moving assembly 1222 may include an opening area surrounding the lens group 1221. This moving assembly 1222 is used interchangeably with the first and second lens assemblies. The moving assembly 1222 or the lens assembly can move along the optical axis direction (Z-axis direction) within the housing 1230. And the moving assembly 1222 can be combined with the lens group 1221 by various methods. Additionally, the moving assembly 1222 may include a groove on its side, and may be coupled to the first magnet 1252a and the second magnet 1252b through the groove. A coupling member, etc. may be applied to the groove.

Additionally, the moving assembly 1222 may be coupled with elastic portions (not shown) at the top and rear ends. Accordingly, the moving assembly 1222 moves in the third direction (Z-axis direction) and may be supported by an elastic unit (not shown). That is, the position of the moving assembly 1222 can be maintained in the third direction (Z-axis direction). The elastic portion (not shown) may be made of various elastic elements such as leaf springs.

The moving assembly 1222 is located within the housing 1230 and may include a first lens assembly 1222a and a second lens assembly 1222b.

The area where the third lens group is seated in the second lens assembly 1222b may be located at the rear end of the first lens assembly 1222a. In other words, the area where the third lens group 1221c is seated in the second lens assembly 1222b may be located between the image sensor and the area where the second lens group 1221b is seated in the first lens assembly 1222a. there is.

The first lens assembly 1222a and the second lens assembly 1222b may face the first guide part G1 and the second guide part G2, respectively. The first guide part G1 and the second guide part G2 may be located on the first side 1232a and the second side 1232b of the housing 1230 (or the 2-2 housing), which will be described later. For example, in the housing 1230, the first lens assembly 1222a may face the first guide part G1. And in the housing 1230, the second lens assembly 1222b may face the second guide part G2.

Additionally, optical driving magnets may be seated on the outer surfaces of the first lens assembly 1222a and the second lens assembly 1222b. For example, the second magnet 1252b may be seated on the outer surface of the second lens assembly 1222b. A first magnet 1252a may be seated on the outer surface of the first lens assembly 1222a. In this specification, the first lens assembly 1222a may be used interchangeably with ‘first bobbin’. The second lens assembly 1222b may be used interchangeably with ‘second bobbin’.

The housing 1230 may be disposed between the lens unit 1220 and the shield can (not shown). And the housing 1230 may be arranged to surround the lens unit 1220.

The housing 1230 may include a 2-1 housing 1231 and a 2-2 housing 1232. The 2-1 housing 1231 is combined with the first lens group 1221a and can also be combined with the first camera actuator described above. The 2-1 housing 1231 may be located in front of the 2-2 housing 1232. The 2-1 housing may be called a 'fixed assembly', a 'fixed lens assembly', a 'fixed lens accommodating portion', etc. The 2-2 housing may be called 'main barrel', 'lens barrel', 'barrel', etc.

And the 2-2 housing 1232 may be located at the rear end of the 2-1 housing 1231. The first and second lens assemblies and the lens unit 1220 may be seated inside the 2-2 housing 1232.

The housing 1230 (or the 2-2 housing 1232) may have a hole formed on a side. A first coil 1251a and a second coil 1251b may be disposed in the hole. The hole may be located to correspond to the groove of the moving assembly 1222 described above. At this time, there may be a plurality of first coils 1251a and second coils 1251b.

In an embodiment, the housing 1230 (particularly, the 2-2 housing 1232) may include a first side 1232a and a second side 1232b. The first side 1232a and the second side 1232b may be positioned to correspond to each other. For example, the first side 1232a and the second side 1232b may be arranged symmetrically with respect to the third direction. Optical driving coils 1251 may be located on the first side 1232a and the second side 1232b. Additionally, the substrate portion 1270 may be seated on the outer surfaces of the first side portion 1232a and the second side portion 1232b. In other words, the first substrate may be located on the outer surface of the first side 1232a, and the second substrate may be located on the outer surface of the second side 1232b.

Furthermore, the first guide part G1 and the second guide part G2 are located on the first side 1232a and the second side 1232b of the housing 1230 (particularly, the 2-2 housing 1232). can do.

The first guide part (G1) and the second guide part (G2) may be positioned to correspond to each other. For example, the first guide part G1 and the second guide part G2 may be positioned opposite to each other based on the third direction (Z-axis direction). Additionally, at least a portion of the first guide part G1 and the second guide part G2 may overlap each other in the second direction (Y-axis direction).

The first guide part G1 and the second guide part G2 may include at least one groove (eg, guide groove) or recess. And the first ball (B1) or the second ball (B2) can be seated in the groove or recess. The second camera actuator 1200 may further include a ball or ball portion. The ball portion may include a first ball (B1) and a second ball (B2). By the ball portion, the first and second lens assemblies can move along the optical axis direction. At this time, the ball part may include at least one rolling member and a ball. And at least one ball can move along the guide grooves of the first and second guide parts. Additionally, at least one ball may move along the recess or groove of the first and second lens assemblies. Accordingly, the first ball (B1) or the second ball (B2) can move in the third direction (Z-axis direction) within the guide groove of the first guide portion (G1) or the guide groove of the second guide portion (G2). there is.

The first ball B1 or the second ball B2 is placed along a rail formed inside the first side 1232a of the housing 1230 or a rail formed inside the second side 1232b of the housing 1230. You can move in any direction. For example, the first ball B1 may move along a rail formed inside the first side 1232a. And the second ball B2 can move along the rail formed inside the second side portion 1232b.

Accordingly, the first lens assembly 1222a and the second lens assembly 1222b can move in the third direction or the optical axis direction. At this time, the second lens assembly 1222b may be disposed adjacent to or closer to the image sensor than the first lens assembly 1222a.

According to the embodiment, the first ball B1 may contact the first lens assembly 1222a. The second ball B2 may contact the second lens assembly 1222b. Accordingly, depending on the location, the first ball B1 may overlap at least a portion of the second ball B2 along the first direction (X-axis direction).

Additionally, the first guide portion G1 may include first guide grooves GG1a and GG1b facing the first recess RS1. Additionally, the second guide portion G2 may include second guide grooves GG2a and GG2b facing the second recess RS2. The first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may be grooves extending in the third direction (Z-axis direction). And the first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may be grooves of different shapes. For example, at least one of the first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may have a groove with an inclined side, and the other may have a groove with a side that is perpendicular to the bottom.

Additionally, there may be a plurality of first guide grooves (GG1a, GG1b) or second guide grooves (GG2a, GG2b). In addition, a plurality of balls with at least partially different diameters may be located within the plurality of guide grooves.

The second magnet 1252b may be positioned to face the second coil 1251b. Additionally, the first magnet 1252a may be positioned to face the first coil 1251a.

For example, at least one of the first coil 1251a and the second coil 1251b may be composed of at least one coil. For example, the first coil 1251a may be composed of a plurality of coils. The second coil 1251b may be composed of a plurality of coils. The first and second coils may be composed of one coil. The first coil may be made of one coil, and the second coil may be made of one coil. Even in this case, long strokes can be implemented.

In an embodiment, the optical drive coil 1251 may be composed of sub-coils sequentially arranged along the optical axis direction (Z-axis direction). For example, a plurality of sub-coils may be sequentially arranged in the optical axis direction on each side of the main barrel 1232.

In this embodiment, the optical driving coil 1251 may include a first driving unit and a second driving unit. The first driving unit may provide driving force to move the first lens assembly 1222a along the optical axis direction. The first driving unit may include a first coil 1251a and a first magnet 1252a. Additionally, the first driving unit may include a first driving coil and a first driving magnet. Accordingly, the first coil 1251a may be referred to as a ‘first driving coil’. And the first magnet 1252a may be called a ‘first driving magnet’.

And the second driving unit may provide driving force to move the second lens assembly 1222b along the optical axis direction. The second driving unit may include a second coil 1251b and a second magnet 1252b.

Additionally, the second driving unit may include a second driving coil and a second driving magnet. Accordingly, the second coil 1251b may be called a ‘second driving coil’. And the second magnet 1252b may be called a ‘second driving magnet’.

The elastic unit (not shown) may include a first elastic member (not shown) and a second elastic member (not shown). The first elastic member (not shown) may be coupled to the upper surface of the moving assembly 1222. The second elastic member (not shown) may be coupled to the lower surface of the moving assembly 1222. Additionally, the first elastic member (not shown) and the second elastic member (not shown) may be formed of leaf springs as described above. Additionally, the first elastic member (not shown) and the second elastic member (not shown) may provide elasticity for movement of the moving assembly 1222. However, it is not limited to the above-described positions, and the elastic portion may be placed in various positions.

Additionally, the driving unit 1250 may provide driving force to move the lens unit 1220 in the third direction (Z-axis direction). This driving unit 1250 may include an optical driving coil 1251 and an optical driving magnet 1252. The optical drive coil 1251 and the optical drive magnet 1252 may be positioned to face each other. For example, the first driving coil 1251a and the first driving magnet 1252a may be positioned to face each other. Additionally, the second driving coil 1251b and the second driving magnet 1252b may be positioned to face each other. The first driving coil 1251a may be disposed on one side of the housing along the second direction, and the second driving coil 1251a may be disposed on the other side of the housing along the second direction.

Furthermore, the driving unit 1250 may further include a Hall sensor unit. The Hall sensor unit 1253 includes at least one first Hall sensor 1253a and a second Hall sensor 1253b, and may be located inside or outside the optical drive coil 1251.

The moving assembly may move in the third direction (Z-axis direction) by the electromagnetic force formed between the optical driving coil 1251 and the optical driving magnet 1252.

The optical driving coil 1251 may include a first coil 1251a and a second coil 1251b. Additionally, as described above, the first coil 1251a and the second coil 1251b may be composed of a plurality of sub-coils. Additionally, the first coil 1251a and the second coil 1251b may be disposed in a hole formed on the side of the housing 1230. And the first coil 1251a and the second coil 1251b may be electrically connected to the substrate portion 1270. Accordingly, the first coil 1251a and the second coil 1251b can receive current, etc. through the substrate portion 1270.

Additionally, the optical drive coil 1251 may be coupled to the substrate portion 1270 through a yoke or the like.

Additionally, in an embodiment, the optical drive coil 1251 is a fixed element together with the substrate portion 1270. In contrast, the optical driving magnet 1252 is a moving element that moves in the optical axis direction (Z-axis direction) together with the first and second assemblies.

The optical driving magnet 1252 may include a first magnet 1252a and a second magnet 1252b.

In an embodiment, the first coil 1251a may include a first sub-coil (SC1a) and a second sub-coil (SC2a). The first sub-coil (SC1a) and the second sub-coil (SC2a) may be sequentially arranged in the optical axis direction. The first sub-coil (SC1a) may be located closer to the first camera actuator than the second sub-coil (SC2a).

And the second coil 1251b may include a third sub-coil (SC1b) and a fourth sub-coil (SC2b). The third sub-coil (SC1b) and the fourth sub-coil (SC2b) may be sequentially arranged in the optical axis direction. The third sub-coil (SC1b) may be located closer to the first camera actuator than the fourth sub-coil (SC2b).

And the first magnet 1252a may face the first sub-coil (SC1a) and the second sub-coil (SC2a). The second magnet 1252b may face the third sub-coil (SC1b) and the fourth sub-coil (SC2b). The first sub-coil (SC1a) may be positioned to overlap the third sub-coil (SC1b) in the second direction. The second sub-coil (SC2a) may be positioned to overlap the fourth sub-coil (SC2b) in the second direction. In this way, the first magnet 1252a and the second magnet 1252b can be equally arranged to face the two sub-coils.

The first sub-coil (SC1a) and the second sub-coil (SC2a) may be arranged to be spaced apart from each other in the optical axis direction. The first sub-coil (SC1a) and the second sub-coil (SC2a) may be connected in parallel to each other. For example, one of the one end and the other end of the first subcoil (SC1a) may be connected to one of the one end and the other end of the second subcoil (SC2a) as a node. Additionally, the other one of the first and second ends of the first subcoil (SC1a) may be connected to another node of the second subcoil (SC2a). That is, the current applied to the first sub-coil (SC1a) and the second sub-coil (SC2a) may be distributed to each sub-coil. Accordingly, the first sub-coil (SC1a) and the second sub-coil (SC2a) are electrically connected in parallel, thereby reducing heat generation.

Additionally, the polarity of one side of the first driving magnet 1252a facing the first coil may be the same as the polarity of one side of the second driving magnet 1252b facing the second coil. For example, the inner surface of the first driving magnet 1252a and the inner surface of the second driving magnet 1252b may have either an N pole or an S pole (eg, an N pole). The outer surface of the first driving magnet 1252a and the outer surface of the second driving magnet 1252b may have one of the N pole and the S pole (eg, S pole). Here, the inner side may be a side adjacent to the optical axis based on the optical axis, and the outer side may be a side farthest from the optical axis. Additionally, the first magnet 1252a may have a first pole on the first surface BSF1 facing the optical driving coil (eg, first coil). Additionally, the first magnet 1252a may have a second pole on the second surface BSF2, which is opposite to the first surface BSF1. The second magnet 1252b may have a first pole on the first surface BSF1 facing the optical driving coil (eg, second coil). Additionally, the second magnet 1252b may have a second pole on the second surface BSF2, which is opposite to the first surface BSF1. The first pole may be either an N pole or an S pole. And the second pole may be the other one of the N pole and the S pole.

Alternatively, the first driving magnet and the second driving magnet may have a structure in which N-pole/S-pole or S-pole/N-pole are sequentially arranged along the optical axis direction.

Additionally, the third sub-coil (SC1b) and the fourth sub-coil (SC2b) may be arranged to be spaced apart from each other in the optical axis direction. The third sub-coil (SC1b) and fourth sub-coil (SC2b) may be connected in parallel to each other. For example, one of the one end and the other end of the third subcoil (SC1b) may be connected to one of the one end and the other end of the fourth subcoil (SC2b) as a node.

The first magnet 1252a and the second magnet 1252b may be placed in the above-described groove of the moving assembly 1222 and may be positioned to correspond to the first coil 1251a and the second coil 1251b. Additionally, the optical drive magnet 1252 may be combined with the first and second lens assemblies (or moving assemblies) along with a yoke to be described later.

The base unit 1260 may be located between the lens unit 1220 and the image sensor in the circuit board. Components such as a filter may be fixed to the base portion 1260. Additionally, the base portion 1260 may be arranged to surround the image sensor described above. With this configuration, the image sensor is free from foreign substances, etc., so the reliability of the device can be improved. However, this will be removed and explained in some drawings below.

Additionally, the second camera actuator 1200 may be a zoom actuator or an auto focus (AF) actuator. For example, the second camera actuator supports one or more lenses and can perform an auto-focusing function or a zoom function by moving the lenses according to a control signal from a predetermined control unit.

And the second camera actuator may be a fixed zoom or continuous zoom. For example, the second camera actuator may provide movement of the lens group 1221.

In addition, the second camera actuator may be comprised of a plurality of lens assemblies. For example, the second camera actuator may include at least one of a third lens assembly (not shown), and a guide pin (not shown) in addition to the first lens assembly 1222a and the second lens assembly 1222b. . The above-described content may be applied to this. Accordingly, the second camera actuator can perform a high-magnification zooming function through the driving unit.

The image sensor may be located inside or outside the second camera actuator. In an embodiment, as shown, the image sensor may be located outside the second camera actuator. For example, the image sensor may be located on a circuit board. An image sensor can receive light and convert the received light into an electrical signal. Additionally, the image sensor may consist of a plurality of pixels in an array form. And the image sensor may be located on the optical axis.

The substrate portion 1270 may be in contact with the side of the housing. For example, the substrate portion 1270 is located on the outer surface (first side) of the first side of the housing, particularly the 2-2 housing, and the outer surface (second side) of the second side, 2 It can be in contact with the side.

The second camera actuator includes a first stopper (ST1a, ST1b) disposed at one end (or front end, one side) within the housing (or 2-2 housing 1232) and a second stopper (ST1a, ST1b) disposed at the other end (or rear end, other side). It may further include stoppers (ST2a, ST2b).

The first stopper (ST1) may be located at one end of the housing. For example, the first stopper ST1 may be located at an end of the 2-2 housing or the main barrel 1232 in a direction opposite to the optical axis direction.

Additionally, the first stopper (ST1) may include a 1-1 stopper (ST1a) disposed on one side and a 1-2 stopper (ST1b) disposed on the other side. The 1-1 stopper (ST1a) may be located adjacent to the first side. The 1-2 stopper (ST1b) may be located adjacent to the second side. One side and the other side may mean one side and its opposite side in a second direction.

Alternatively, the 1-1 stopper ST1a may overlap the guiding part of the first lens assembly in the optical axis direction.

Additionally, the second stopper ST2 may be disposed at the other end of the 2-2 housing or the main barrel 1232. For example, the second stopper ST2 may be located at an end of the 2-2 housing or the main barrel 1232 in the optical axis direction.

Additionally, the second stopper (ST2) may include a 2-1 stopper (ST2a) disposed on one side and a 2-2 stopper (ST2b) disposed on the other side. The 2-1 stopper (ST2a) may be located adjacent to the first side. The 2-2 stopper (ST1b) may be located adjacent to the second side.

The first stopper (ST1) and the second stopper (ST2) may limit the moving distance of the mobile assembly and absorb shock.

Referring to FIGS. 7 and 8, electromagnetic force will be described below based on one coil. In the camera device according to the embodiment, electromagnetic force (DEM1) is generated between the first magnet (1252a) and the first coil (1251a) so that the first lens assembly (1222a) is horizontal to the optical axis, that is, in the third direction (Z-axis direction) or It can move along a rail located on the inner side of the housing through the first ball B1 in a direction opposite to the third direction. At this time, the first magnet 1252a and the second magnet 1252b do not move to the area facing the edges of the first and second sub-coils. Accordingly, electromagnetic force is formed based on the flow of current in adjacent areas of the first subcoil and the second subcoil.

As described above, in the camera device according to the embodiment, the first magnet 1252a may be provided in the first lens assembly 1222a by, for example, a unipolar magnetization method. For example, in an embodiment, the surface (first surface) facing the outer surface of the first magnet 1252a may be the S pole. And the outer surface of the first magnet 1252a may be the surface facing the first coil 1251a. And the first side and the opposite side may be the N pole. Accordingly, only one of the N pole and the S pole can be positioned to face the first coil 1251a. Here, the description will be based on the fact that the outer surface of the first magnet 1252a is the S pole. Furthermore, the first coil 1251a is composed of a plurality of sub-coils, and currents may flow in opposite directions in the plurality of sub-coils. That is, the current may flow at the same level as 'DE1' in the area adjacent to the second sub-coil (SC2a) in the first sub-coil (SC1a).

In other words, the current direction of the first area of the first subcoil SC1a and the second area of the second subcoil SC2a may be the same. The first area of the first sub-coil (SC1a) overlaps the first driving magnet 1252a in a direction perpendicular to the optical axis direction (second direction) and is disposed perpendicular to the optical axis direction (e.g., disposed along the first direction). ) area. The second region of the second sub-coil Sc2a overlaps the first driving magnet 1252a in a direction perpendicular to the optical axis direction (second direction) and is disposed perpendicular to the optical axis direction (e.g., disposed along the first direction). is an area).

In addition, as shown, in the embodiment, magnetic force is applied from the S pole of the first magnet 1252a in the second direction (Y-axis direction), and a current is applied from the first coil 1251a in the first direction (X-axis direction). When (DE1) flows, electromagnetic force (DEM1) may act in the third direction (Z-axis direction) according to the interaction of electromagnetic force (e.g., Fleming's left-hand rule).

At this time, since the first coil 1251a is fixed to the side of the housing, the first lens assembly 1222a on which the first magnet 1252a is disposed moves in the Z-axis direction by electromagnetic force DEM1 according to the direction of the current. can move in the opposite direction. That is, the optical drive magnet can move in the opposite direction of the electromagnetic force applied to the optical drive coil. Additionally, the direction of electromagnetic force may change depending on the current of the coil and the magnetic force of the magnet.

Accordingly, the first lens assembly 1222a can move along the rail located on the inner surface of the housing through the first ball in the third direction or in a direction parallel to the optical axis direction (both directions). At this time, the electromagnetic force (DEM1) can be controlled in proportion to the current (DE1) applied to the first coil (1251a).

The first lens assembly 1222a may include a first recess in which the first ball rests. The second lens assembly 1222b may include a second recess in which the second ball rests.

There may be a plurality of first recesses (RS1) and second recesses (RS2). The length of some of the first recesses RS1 may be preset in the optical axis direction (Z-axis direction). Additionally, the length of some of the second recesses RS2 may be preset in the optical axis direction (Z-axis direction). Accordingly, the movement distance of the first ball and the second ball in the direction of the optical axis within each recess can be adjusted. In other words, the first recess (RS1) or the second recess (RS2) may be a stopper for the first and second balls. Alternatively, the moving assembly may move in the direction of the optical axis as the first ball and the second ball slip in the first recess (RS1) and the second recess (RS2).

And in the camera device according to the embodiment, the second magnet 1252b may be provided in the second lens assembly 1222b by, for example, a unipolar magnetization method.

Furthermore, the first coil 1251a is composed of a plurality of sub-coils, and currents may flow in opposite directions in the plurality of sub-coils. That is, the current may flow at the same level as 'DE1' in the area adjacent to the second sub-coil (SC2a) in the first sub-coil (SC1a).

Additionally, in the embodiment, either the N pole or the S pole of the second magnet 1252b may be positioned to face the second coil 1251b. And in the embodiment, the surface (first surface) facing the outer surface of the second magnet 1252b may be the S pole. Additionally, the first side may be the N pole. Hereinafter, the description will be made based on the fact that the first side as shown is the N pole.

Furthermore, the second coil 1251b is composed of a plurality of sub-coils, and currents may flow in opposite directions in the plurality of sub-coils. That is, the current may flow at the same level as 'DE2' in the area of the first sub-coil (SC1b) adjacent to the second sub-coil (SC2b).

In the embodiment, the magnetic force DM2 is applied from the first surface (N pole) of the second magnet 1252b in the second direction (Y-axis direction), and the magnetic force DM2 is applied in the first direction from the second coil 1251b corresponding to the N pole. When the current DE2 flows in the (X-axis direction), the electromagnetic force (DEM2) may act in the third direction (Z-axis direction) according to the interaction of electromagnetic force (e.g., Fleming's left-hand rule).

At this time, since the second coil 1251b is fixed to the side of the housing, the second lens assembly 1222b on which the second magnet 1252b is disposed moves in the Z-axis direction by electromagnetic force (DEM2) according to the direction of the current. can move in the opposite direction. For example, as described above, the direction of electromagnetic force may change depending on the current of the coil and the magnetic force of the magnet. Accordingly, the second lens assembly 1222b can move along the rail located on the inner surface of the housing through the second ball B2 in a direction parallel to the third direction (Z-axis direction). At this time, the electromagnetic force (DEM2) can be controlled in proportion to the current (DE2) applied to the second coil (1251b).

Referring to FIG. 9, in the camera device according to the embodiment, the driving unit provides driving force to move the first lens assembly 1222a and the second lens assembly 1222b of the lens unit 1220 along the third direction (Z-axis direction). (F3A, F3B, F4A, F4B) can be provided. As described above, this driving unit may include an optical driving coil 1251 and an optical driving magnet 1252. Additionally, the lens unit 1220 may move along the third direction (Z-axis direction) due to the electromagnetic force formed between the optical drive coil 1251 and the optical drive magnet 1252.

At this time, the first coil 1251a and the second coil 1251b may be disposed in holes formed on the sides (eg, first side and second side) of the housing 1230. And the second coil 1251b may be electrically connected to the first substrate. The first coil may be electrically connected to the second substrate. Accordingly, the first coil and the second coil may receive a driving signal (eg, current) from a driving driver on the circuit board of the circuit board 1300 through the substrate portion 1270.

At this time, the first lens assembly 1222a on which the first magnet 1252a is seated moves along the third direction (Z-axis direction) due to the electromagnetic forces (F3A, F3B) between the first coil and the first magnet 1252a. You can. Additionally, the second lens group 1221b mounted on the first lens assembly 1222a may also move along the third direction.

And, by the electromagnetic forces (F4A, F4B) between the second coil and the second magnet (1252b), the second lens assembly (1222b) on which the second magnet (1252b) is seated can move along the third direction (Z-axis direction). there is. Additionally, the third lens group 1221c mounted on the second lens assembly 1222b may also move along the third direction.

Accordingly, as described above, the focal length or magnification of the optical system can be changed by moving the second lens group 1221b and the third lens group 1221c. In an embodiment, magnification may be changed by moving the second lens group 1221b. In other words, zooming can be achieved. Additionally, the focus can be adjusted by moving the third lens group 1221c. In other words, auto focusing can be achieved.

Additionally, the second camera actuator may be a fixed zoom or continuous zoom depending on the movement method of the second lens group (or third lens group).

Furthermore, the first Hall sensor 1253a and the second Hall sensor 1253b may be disposed in at least one of the first subcoil and the second subcoil. For example, the first Hall sensor 1253a and the second Hall sensor 1253b may overlap in the second direction. Alternatively, the first Hall sensor 1253a and the second Hall sensor 1253b may not overlap in the second direction. Alternatively, the first Hall sensor 1253a and the second Hall sensor 1253b may partially overlap in the second direction.

Figure 10 is a perspective view of a first lens assembly, a first bonding member, a second bonding member, and a second lens assembly according to an embodiment.

Referring to FIG. 10, the first lens assembly 1222a and the second lens assembly 1222b may be arranged to be spaced apart in the optical axis direction (Z-axis direction). And the first lens assembly 1222a and the second lens assembly 1222b, which are moving assemblies, can be moved along the optical axis direction (Z-axis direction) by the driving unit.

Additionally, the first lens assembly 1222a may include a first lens holder LAH1 that holds and couples the second lens group 1221b. The first lens holder LAH1 may be combined with the second lens group 1221b. Additionally, the first lens holder LAH1 may include a first lens hole LH1 for accommodating the second lens group 1221b. That is, a second lens group 1221b including at least one lens may be disposed in the first lens hole LH1. The first guide part G1 may be spaced apart from one side of the first lens holder LAH1. For example, the first guide part G1 and the first lens holder LAH1 may be sequentially arranged in the second direction (Y-axis direction).

And the second lens assembly 1222b may include a second lens holder LAH2 holding and combining the third lens group 1221c. Additionally, the second lens holder LAH2 may include a second lens hole LH2 for accommodating the third lens group 1221c. That is, at least one lens may be disposed in the second lens hole LH2.

The second guide part G2 may be disposed on the other side of the second lens holder LAH2. The second guide part G2 may be disposed opposite to the first guide part G1.

In an embodiment, the first guide part G1 and the second guide part G2 may overlap at least partially in the second direction (Y-axis direction). With this configuration, the space efficiency of the second driving unit for moving the first and second lens assemblies within the second camera actuator is improved, making it possible to easily miniaturize the second camera actuator.

Additionally, the second guide part G2 and the second lens holder LAH2 may be sequentially arranged in directions opposite to the second direction (Y-axis direction).

A first ball and a first coil may be placed in the first guide part G1 as described above, and a second ball and a second coil may be placed in the second guide part G2 as described above. there is.

In an embodiment, each of the first lens assembly 1222a and the second lens assembly 1222b may include outer surfaces adjacent to each other. The first lens assembly 1222a may include a first outer surface, and the second lens assembly 1222b may include a second outer surface. The first outer surface may be a bottom surface of the first lens holder based on the optical axis direction (Z-axis direction). And the third outer surface, which will be described later, may be the upper surface of the first lens holder. Additionally, the second outer surface may be the top surface of the second lens holder, and the fourth outer surface may be the bottom surface of the second lens holder.

And the first outer surface and the second outer surface may overlap at least partially in the optical axis direction (Z-axis direction). In an embodiment, the first to fourth outer surfaces may at least partially overlap each other in the optical axis direction (Z-axis direction).

For example, a joining member (not shown) may contact at least one of the first outer surface and the second outer surface.

According to the embodiment, the ball unit or ball may include a first ball (B1) and a second ball (B2). Additionally, the guide part may include a first guide part (G1) and a second guide part (G2). The ball may be located between the moving assembly and the guide portion. For example, the first ball may be located between the first guide part G1 and the first lens assembly 1222a. And the second ball B2 may be located between the second guide part G2 and the second lens assembly 1222b.

Each of the first lens assembly 1222a and the second lens assembly 1222b may include a recess on the outer surface in which the ball rests on the surface (or wing surface or side of the first and second assembly) facing the guide part. . That is, the moving assembly may include a recess facing the guide portion. For example, the first lens assembly 1222a may include a first recess facing the first guide part G1. The second lens assembly 1222b may include a second recess facing the second guide part G2. And a ball portion or ball may be placed in the recess. In an embodiment, the recess may include a first recess in which the first ball rests and a second recess in which the second ball B2 rests, as described above.

FIG. 11 is a perspective view showing a first guide portion according to an embodiment, FIG. 12 is a side view showing a first guide portion according to an embodiment, FIG. 13 is a view cut along GG′ in FIG. 12, and FIG. 14 is a view showing a first guide portion according to an embodiment. 12 is a view taken along line HH', FIG. 15 is another side view showing the first guide part according to an embodiment, and FIG. 16 is another perspective view showing the first guide part according to the embodiment.

Referring to FIGS. 11 to 16, the guide portion may include a guide groove in which the first ball and the second ball rest. The guide groove may correspond to the above-described first recess and second recess, respectively. The guide groove may include a first guide groove and a second guide groove.

The first guide portion G1 may include first guide grooves GG1a and GG1b facing the first recess RS1. Additionally, the second guide portion G2 may include second guide grooves GG2a and GG2b facing the second recess RS2. The first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may be grooves extending in the third direction (Z-axis direction). And the first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may be grooves of different shapes. For example, at least one of the first guide grooves (GG1a, GG1b) and the second guide grooves (GG2a, GG2b) may have a groove with an inclined side, and the other may have a groove with a side that is perpendicular to the bottom.

In the drawing, the first guide part G1 is shown and will be described below based on this. The description of the first guide part G1 can be equally applied to the second guide part G2. That is, the content described below may be applied to at least one of the first guide part and the second guide part.

Additionally, the first guide part G1 may include a guide base GB, a first extension part GE1, and a second extension part GE2.

The guide base GB may include first guide grooves GG1a, GG1b on which a ball (e.g., first ball) rests, and a base groove GBh overlapping the first guide groove in the optical axis direction (Z-axis direction). You can.

The first guide part G1 may include a first extension part GE1 extending from one end of the guide base GB to one side and a second extension part GE2 extending from the other end of the guide base GB to one side. You can.

For example, the first extension GE1 may be located at an end opposite to the optical axis direction from the guide base GB. The second extension GE2 may be located at an end of the guide base GB in the optical axis direction. Accordingly, the first extension GE1 may be located closer to the first camera actuator than the second extension GE2. Additionally, the second extension GE2 may be located closer to the image sensor than the first extension GE1.

Additionally, the first extension part GE1 and the second extension part GE2 may be extended or bent from both sides of the guide base GB to one side.

In an embodiment, the first extension part GE1 and the second extension part GE2 may extend inward or outward from the guide base GB. That is, the first extension GE1 may extend inward or outward from the guide base GB. The second extension GE2 may extend inward or outward from the guide base GB. For example, the first extension part GE1 and the second extension part GE2 may extend outward from the guide base GB. The first extension part GE1 and the second extension part GE2 may extend from the guide base GB to the adjacent substrate part.

The base groove (GBh) may be located on both sides of the guide base (GB). Additionally, the base groove GBh may be located at the edge or edge of the first guide. In an embodiment, the base groove GBh may include a first base groove GBh1 disposed on one side of the guide base GB and a second base groove GBh2 disposed on the other side. Additionally, the first base groove GBh1 may be disposed closer to the first camera actuator or farther from the image sensor than the second base groove GBh2.

The first base groove (GBh1) and the second base groove (GBh2) may be spaced apart in the optical axis direction. Additionally, there may be a plurality of first base grooves GBh1 and second base grooves GBh2. The plurality of first base grooves GBh1 may be arranged to be spaced apart in a vertical direction or a first direction (X-axis direction). The plurality of second base grooves GBh2 may be arranged to be spaced apart in the vertical direction or the first direction (X-axis direction).

Additionally, the first base groove GBh1 may be located adjacent to the first extension GE1. The second base groove GBh2 may be located adjacent to the second extension GE2. The first guide grooves GG1a and GG1b may be located between the first base groove GBh1 and the second base groove GBh2.

The first base groove (GBh1) and the second base groove (GBh2) may overlap the first guide grooves (GG1a, GG1b) in the optical axis direction. Even if the length of the first guide part increases when implementing a long stroke, bending of the first guide can be suppressed even when assembling the first guide part and the main barrel. Therefore, the driving accuracy of the moving assembly can be improved.

Additionally, the first extension portion GE1 and the second extension portion GE2 may overlap the base groove GBh in the horizontal direction (Y-axis direction). That is, the first extension portion GE1 and the second extension portion GE2 may be disposed on both sides of the guide base GB, and the base groove GBh may also be disposed on both sides of the guide base GB. And the base groove (GBh) may contact some areas of the main barrel. Due to this configuration, even when the first guide portion (G1) is joined or combined (assembled) with the main barrel by the base groove (GBh), the areas of the first guide grooves (GG1a, GG1b) in the first guide portion are bent. You may not lose. For example, in the first guide part, the base groove GBh may be located on the inner surface of the first guide part. Accordingly, force may be applied outward to the first guide portion inserted inward from the main barrel for assembly (e.g., pushing). At this time, in order to provide a long stroke, the length of the first guide part in the optical axis direction may be large. And even if force is applied to the base groove for assembly, structural deformation of the first guide portion (eg, the area where the guide groove is located) can be suppressed depending on the position of the base groove described above. Furthermore, ease of assembly can be improved as the base groove is located adjacent to a corner of the edges of the first guide portion.

Additionally, the guide portion (G1) or the guide base (GB) may include a guide hole (Gh). A coil (first coil), a magnet (first magnet), and a yoke (first yoke) may be located in the guide hole (Gh).

The guide hole Gh may overlap the first guide grooves GG1a and GG1b in a vertical direction or a second direction. Accordingly, driving force can be efficiently provided to move the mobile assembly along the optical axis direction.

Additionally, the area of the guide hole Gh located on the inside of the first guide part G1 may be larger than the area of the guide hole located on the outside. For example, the maximum length of the first coil in the optical axis direction may be greater than the maximum movement distance of the first magnet and the first yoke in the optical axis direction. In other words, the first magnet and the first yoke may not move to the outside of the first coil in the optical axis direction. By this configuration, the generation of back electromotive force between the first coil and the first magnet can be suppressed. As a result, the second camera actuator can provide improved driving efficiency.

The length L1 of the first base groove GBh1 in the optical axis direction (Z-axis direction) may be greater than the length L2 of the second base groove GBh2 in the optical axis direction. Additionally, correspondingly, the distance in the optical axis direction of the first extension part GE1 may be greater than the distance in the optical axis direction of the second extension part GE2. By this configuration, the rigidity or reliability of the first guide portion can be maintained when assembling the base groove and the lens barrel.

Additionally, the first base groove GBh1 may be spaced apart from the first guide grooves GG1a and GG1b in the optical axis direction. The first guide grooves (GG1a, GG1b) may have their inner surfaces located on the opposite side in the direction of the optical axis. Accordingly, when the first ball moves in a direction opposite to the optical axis direction, the first guide grooves GG1a and GG1b may be stoppers or drop-off prevention members. Additionally, the rigidity of the first guide portion can be improved.

And the first guide grooves (GG1a, GG1b) may be opened toward the second base groove (GBh2). That is, the first guide grooves GG1a and GG1b may have an open area EA located at one end. The open area (EA) allows for easy coupling between the first guide part and the main barrel.

In an embodiment, the horizontal depth L4 of the first base groove GBh1 may be smaller than the horizontal depth L5 of the first guide grooves GG1a and GG1b. By this configuration, the coupling force between the first guide portion and the main barrel can be increased. Furthermore, even if the first ball moves along the first guide grooves GG1a and GG1b, structural deformation of the first guide portion can be suppressed.

Additionally, the second extension GE2 may include an extension protrusion that protrudes or extends in the optical axis direction. A base coupling portion (GBP) may be located on the extended protrusion. The base coupling portion (GBP) may have a groove or groove. The coupling force between the main barrel and the first guide part can be further improved by the base coupling part (GBP).

FIG. 17 is another side view showing a first guide unit according to an embodiment, FIG. 18 is an internal perspective view of a second camera actuator according to an embodiment, FIG. 19 is a view taken along line II in FIG. 4, and FIG. 20 is a plan view of the second camera actuator according to the embodiment, FIG. 21 is a perspective view and a partially enlarged view of the second camera actuator according to the embodiment, and FIG. 22 is an enlarged view of the rear end of the second camera actuator according to the embodiment. .

Referring to Figures 17 and 18, the first guide part according to the embodiment includes a first area (S1), a first extension part (GE1), and a second extension part (GE2) overlapping the base groove (GBh) in the optical axis direction. and a second area S2 overlapping in the optical axis direction. The first area S1 may be located inside the second area S2.

The first magnet and the first yoke of the driving unit may be located in the guide hole of the first area S1. That is, the first magnet and the first yoke may be located between the first extension part GE1 and the second extension part GE2. And the first coil of the driving unit may be located in the guide hole of the second area (S2). Accordingly, the first magnet and the first yoke may be located inside the first coil. Furthermore, the first area S1 may overlap at least a portion of the first ball in the optical axis direction.

With this configuration, the first guide unit G1 can have sufficient stroke space when the first lens assembly 1222a moves in the optical axis direction. Furthermore, the length of the guide hole in the optical axis direction may correspond to the length of the guide groove in the optical axis direction. Accordingly, the first yoke and first magnet in the guide hole can contact the inner surfaces of the guide base on both sides of the guide hole. Accordingly, when the first lens assembly is driven, the first lens assembly may contact the first stopper or the inner surface of the guide base disposed on both sides of the guide hole. As a result, the reliability of the second camera actuator according to driving shock can be improved.

Referring further to FIGS. 19 and 20 , the guide hole Gh of the first guide portion G1 may partially overlap the base portion 1260 in the first or vertical direction. Accordingly, the coupling force between the base part 1260, the first guide part G1, and the main barrel can be improved. Additionally, the base portion 1260 may overlap the second extension portion GE2 in the horizontal direction. Accordingly, the structural reliability of the first base part can be maintained even during assembly between the base part and the first guide part.

Likewise, as described above, the same contents described for the first guide part G1 can be applied to the second guide part G2. The first guide part G1 and the second guide part G2 may be arranged symmetrically with respect to the optical axis or an axis parallel to the optical axis direction.

That is, the first area S1 of the second guide part G2 may be located inside the second area S2. And the coil (second coil, 1251b) may be located in the second area (S2). Additionally, a coil (second coil) may be located between the first and second extension parts of the second guide part G2. The first extension part and the second extension part may overlap the accommodated coil along the optical axis direction. Accordingly, the structural stability of the first coil can also be improved.

Referring further to FIGS. 21 and 22 , in the second camera actuator according to the embodiment, the second stopper (ST2) may overlap the first guide part (G1) in the optical axis direction.

The second stopper (ST2) may be located on the other side of the first guide portion where the exposed area is located. In particular, a portion of the guide hole (Gh) may overlap the second stopper (ST2) in the optical axis direction. Additionally, a portion of the first area of the first guide part G1 may overlap the second stopper ST2 in the optical axis direction. Accordingly, the second stopper ST2 may contact the first lens assembly, the first yoke, and the first magnet. With this configuration, the second stopper ST2 can maintain the reliability of each component by contacting the first lens assembly, the first yoke, and the first magnet when the first lens assembly moves. Additionally, at least a portion of the second stopper (ST2) may be located between the first guide grooves (GG1a, GG1b) spaced apart in the vertical direction. As a result, the second camera actuator can be compactized. In addition, the exposed area or first guide groove is located at the upper and lower portions of the second stopper ST2, so that the first ball can be prevented from falling off.

Additionally, the second extension GE2 may overlap the base portion 1260 in the horizontal direction. Accordingly, the base portion 1260, the main barrel, and the first guide portion G1 are located on the other side of the first guide portion, and durability against physical shock or structural holding power when assembled with each other can be improved.

And the base coupling portion (GBP) of the second extension portion (BE2) may extend in the optical axis direction. Accordingly, unlike the guide groove or base groove formed in the horizontal direction, the groove may be formed in a different direction. Furthermore, the first guide part G1 can be coupled to other components (main barrel or base part) in various directions. As a result, the bonding strength between each component can be improved and structural reliability can be further improved.

Figure 23 is a schematic diagram showing a circuit board according to an embodiment.

Referring to FIG. 23 , as described above, the circuit board 1300 according to the embodiment may include a first circuit board portion 1310 and a second circuit board portion 1320. The first circuit board portion 1310 is located below the base and can be coupled to the base. Additionally, an image sensor (IS) may be disposed on the first circuit board portion 1310. Additionally, the first circuit board unit 1310 and the image sensor IS may be electrically connected. That is, the base is located at the rear end of the second camera actuator, and the image sensor and circuit board (first circuit board part) may be located at the rear end of the base. The base may include a filter (eg, infrared, etc.). The circuit board 1300 may include the image sensor and sensor base described above.

Additionally, the second circuit board portion 1320 may be located on the side of the base. In particular, the second circuit board portion 1320 may be located on the first side of the base. Accordingly, the second circuit board portion 1320 is located adjacent to the first coil located adjacent to the first side, so that electrical connection can be easily made. Additionally, the second circuit board portion 1320 may be located on the second side. As such, there may be a plurality of second circuit board units 1320. However, it is not limited to this and may be placed only on either the first side or the second side.

Furthermore, the circuit board 1300 may additionally include a fixing board (not shown) located on the side. Accordingly, even if the circuit board 1300 is made of a flexible material, it can be coupled to the base while maintaining rigidity by using a fixed board.

The second circuit board portion 1320 of the circuit board 1300 may be located on the side of the driver 1250. The circuit board 1300 may be electrically connected to the first driving unit and the driving unit. For example, electrical connections can be made with SMT. However, it is not limited to this method.

This circuit board 1300 may include a circuit board with a wiring pattern that can be electrically connected, such as a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB), or a rigid flexible PCB. You can. However, it is not limited to these types.

Additionally, the circuit board 1300 may be electrically connected to another camera module within the terminal or a processor of the terminal. Through this, the above-described camera actuator and the camera module including it can transmit and receive various signals within the terminal.

Figure 24 is a perspective view of a mobile terminal to which a camera module is applied according to an embodiment.

As shown in FIG. 24, the mobile terminal 1500 of the embodiment may include a camera module 1000, a flash module 1530, and an autofocus device 1510 provided at the rear.

The camera module 1000 may include an image capture function and an autofocus function. For example, the camera module 1000 may include an autofocus function using an image.

The camera module 1000 processes image frames of still or moving images obtained by an image sensor in shooting mode or video call mode.

The processed image frame can be displayed on a certain display unit and stored in memory. A camera (not shown) may also be placed on the front of the mobile terminal body.

For example, the camera module 1000 may include a first camera module 1000A and a second camera module 1000B, and OIS along with AF or zoom functions may be implemented by the first camera module 1000A. You can.

The flash module 1530 may include a light emitting element inside that emits light. The flash module 1530 can be operated by operating a camera of a mobile terminal or by user control.

The autofocus device 1510 may include one of the packages of surface light emitting laser devices as a light emitting unit.

The autofocus device 1510 may include an autofocus function using a laser. The autofocus device 1510 can be mainly used in conditions where the autofocus function using the image of the camera module 1000 is degraded, for example, in close proximity of 10 m or less or in dark environments.

The autofocus device 1510 may include a light emitting unit including a vertical cavity surface emitting laser (VCSEL) semiconductor device, and a light receiving unit such as a photo diode that converts light energy into electrical energy.

Figure 25 is a perspective view of a vehicle to which a camera module according to an embodiment is applied.

For example, Figure 25 is an external view of a vehicle equipped with a vehicle driving assistance device to which the camera module 1000 according to an embodiment is applied.

Referring to FIG. 25, the vehicle 700 of the embodiment may be provided with wheels 13FL and 13FR that rotate by a power source and a predetermined sensor. The sensor may be a camera sensor (2000), but is not limited thereto.

The camera 2000 may be a camera sensor to which the camera module 1000 according to the embodiment is applied. The vehicle 700 of the embodiment may acquire image information through a camera sensor 2000 that captures a front image or surrounding image, determines the lane identification situation using the image information, and generates a virtual lane when identification is performed. can do.

For example, the camera sensor 2000 may acquire a front image by photographing the front of the vehicle 700, and a processor (not shown) may acquire image information by analyzing objects included in the front image.

For example, if the image captured by the camera sensor 2000 captures objects such as lanes, adjacent vehicles, obstacles, and indirect road markings such as median strips, curbs, and street trees, the processor detects these objects. This can be included in the video information. At this time, the processor can further supplement the image information by obtaining distance information to the object detected through the camera sensor 2000.

Image information may be information about an object captured in an image. This camera sensor 2000 may include an image sensor and an image processing module.

The camera sensor 2000 can process still images or moving images obtained by an image sensor (eg, CMOS or CCD).

The image processing module can process still images or moving images obtained through an image sensor, extract necessary information, and transmit the extracted information to the processor.

At this time, the camera sensor 2000 may include, but is not limited to, a stereo camera to improve measurement accuracy of the object and secure more information such as the distance between the vehicle 700 and the object.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences related to application should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (15)

housing;
a first lens assembly moving in the optical axis direction within the housing;
a driving unit that moves the first lens assembly;
a first guide portion disposed in the housing and facing the first lens assembly; and
Includes a ball disposed between the first guide portion and the first lens assembly,
The first guide part,
A camera actuator including a guide base including a first guide groove on which the ball rests and a base groove located at an edge of the first guide portion and overlapping the first guide groove in the optical axis direction. According to paragraph 1,
The first guide portion includes a first extension portion extending from one end of the guide base to one side; and a second extension extending from the other end of the guide base to the one side. According to paragraph 2,
The first extension part and the second extension part overlap the base groove in a direction perpendicular to the optical axis direction. According to paragraph 1,
The guide base includes a guide hole,
The driving unit includes a coil disposed in the guide hole. According to clause 4,
The guide hole is a camera actuator that overlaps the first guide groove in a direction perpendicular to the optical axis. According to paragraph 2,
The base groove is a camera actuator including a first base groove and a second base groove arranged to be spaced apart in the optical axis direction. According to clause 6,
A camera actuator wherein the first base groove and the second base groove overlap the first guide groove in the optical axis direction. According to clause 6,
A camera actuator wherein the length of the first base groove in the optical axis direction is greater than the length of the second base groove in the optical axis direction. According to clause 6,
The first base groove is a camera actuator arranged to be spaced apart from the first guide groove in the optical axis direction. According to clause 9,
The first guide groove is a camera actuator open toward the second base groove. According to clause 6,
A camera actuator wherein the depth of the first base groove in a direction perpendicular to the optical axis is smaller than the depth of the second base groove in the direction perpendicular to the optical axis. According to paragraph 2,
The first guide portion includes a first area overlapping the base groove in the optical axis direction; and a second area overlapping the first extension part and the second extension part in the optical axis direction. According to clause 12,
The driving unit includes a magnet disposed in the first area; and a coil disposed in the second area. According to paragraph 2,
The second extension portion is a camera actuator including a base coupling portion. According to paragraph 2,
The housing is a camera actuator in contact with the base groove.

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