Patent Description:
Cameras are devices that capture an image or a video of a subject and are mounted on portable devices, drones, vehicles, or the like. The camera device may have an image stabilization (IS) function for correcting or preventing image shake caused by user movement to improve image quality, an auto focusing (AF) function for automatically adjusting an interval between an image sensor and a lens to adjust a focal length of a lens, and a zooming function for increasing or decreasing a magnification of a subject at a long distance through a zoom lens to photograph the subject.

The patent application <CIT> discloses a camera module comprising a lens group and a lens actuator comprising a base, a pin coupled to the base, a housing including a group of lenses to be moved along the pin in an optical axis direction, a magnet disposed on one side of the housing, a yoke spaced apart from the magnet, and a coil disposed between the magnet and the yoke.

Meanwhile, in a camera module, a zoom actuator is used for a zooming function, frictional torque is generated when a lens moves due to mechanical movement of an actuator, and technical problems such as a decrease in driving force, an increase in power consumption, or the degradation of control characteristics are caused by the frictional torque.

In particular, in order to obtain the best optical characteristics using a plurality of zoom lens groups in a camera module, alignment between the plurality of lens groups and the alignment between the plurality of lens groups and an image sensor should be well made. When decentering occurs in which a center of a spherical surface between the lens groups deviates from an optical axis, a tilting phenomenon occurs in which a lens is tilted, or a phenomenon occurs in which central axes of the lens groups and the image sensor are not aligned, an angle of view changes or defocusing occurs, which adversely affects image quality or resolution.

Meanwhile, when a separation distance is increased in a movement area in order to reduce frictional torque generated when a lens moves for a zooming function in a camera module, there is a problem in that a probability of occurrence of decentering or tilting increases.

The present invention is directed to providing a camera actuator applicable to an ultra-slim, ultra-miniature, and high-resolution camera, and a camera device including the same.

The present invention is directed to providing a camera actuator capable of precisely performing zooming and auto focusing (AF) while alignment between lens groups is maintained, and a camera device including the same.

According to an embodiment of the present invention, a camera module includes a lens group, a lens support unit configured to accommodate the lens group, a magnet disposed on an outer surface of the lens support unit, a yoke part that is disposed apart from and faces the magnet, and a coil disposed on the yoke part to face and be spaced apart from the magnet between the magnet and the yoke part, wherein all the lens group, the lens support unit, and the magnet move along an optical axis according to a current applied to the coil, the yoke part includes a first yoke and a second yoke disposed on the first yoke, the second yoke is disposed between the first yoke and the coil, and magnetic permeability of the first yoke is greater than magnetic permeability of the second yoke.

The magnetic permeability of the first yoke may be <NUM>,<NUM> times or more the magnetic permeability of the second yoke.

The first yoke may include a ferritic metal, and the second yoke may include an austenitic metal.

The second yoke may have a thickness of <NUM> or more and <NUM> or less.

An attractive force may act between the magnet and the yoke part, and a repulsive force may act between the first yoke and the second yoke.

A width of the second yoke may be greater than a width of the first yoke.

A thickness of the first yoke may be different from a thickness of the second yoke.

The camera module may further include a base and a pin coupled to the base, wherein the lens support unit moves along the pin.

The camera module may further include a sensor disposed in the coil and configured to detect a distance by which the lens group, the lens support unit, and the magnet move.

The camera module may further include a base, a guide part disposed at one side of the base, and a ball disposed between the guide part and the lens support unit, wherein the lens support unit moves along the ball.

According to a non-claimed example, the camera module may have at least one of an auto focusing (AF) function and a zooming function.

According to a non-claimed example, the camera module may further include a printed circuit board disposed between the second yoke and the coil.

According to a non-claimed example, all thicknesses of the first yoke, the second yoke, and the printed circuit board may be the same.

According to a non-claimed example, at least one of the thicknesses of the first yoke, the second yoke, and the printed circuit board may be different.

According to a non-claimed example, a socket for a test device includes a first plate, a second plate having a first cavity and a second cavity disposed to face the first cavity, a plurality of pins disposed in the first cavity between the first plate and the second plate, and a shape frame disposed in the second cavity, wherein the plurality of pins pass through the first plate in a first direction to correspond to the shape frame, and the first direction is a direction from the first plate toward the second plate.

According to a non-claimed example, the shape frame may include an opening area and a non-opening area, and the plurality of pins may pass through the first plate in the open area and may pass through the second plate in the non-opening area.

According to a non-claimed example, the first plate may include a non-seating portion overlapping the opening area in the first direction and a seating portion overlapping the non-opening area in the first direction to accommodate a test object.

According to a non-claimed example, the non-seating portion and the seating portion may vary according to the shape frame.

According to a non-claimed example, the first plate may include a plurality of first holes, the second plate may include a plurality of second holes, and the plurality of pins overlap the first holes and the second holes in the first direction.

According to a non-claimed example, the plurality of second holes may be positioned inside the first cavity.

According to a non-claimed example, the first cavity may include a first area in which the plurality of pins are disposed and a second area disposed inside the first area, wherein the second area does not overlap the plurality of first holes and the plurality of second holes in the first direction.

According to a non-claimed example, the plurality of pins may pass through at least one of the plurality of first holes and the plurality of second holes.

According to a non-claimed example, the plurality of pins may each include a body portion, a first extension portion extending from the body portion toward the first plate, and a second extension portion extending from the body portion toward the second plate.

According to a non-claimed example, a length of the first extension portion in a second direction may be the same as a length of the second extension portion in the second direction, and the second direction may be a direction perpendicular to the first direction.

According to a non-claimed example, the first extension portion and the second extension portion may have different lengths in the first direction.

According to a non-claimed example, the extension portion may pass through the first hole, and the second extension portion may pass through the second hole.

According to a non-claimed example, the socket may further include a third plate disposed between the first plate and the second plate and including a plurality of third holes.

According to a non-claimed example, the plurality of third holes may overlap the plurality of first holes and the plurality of second holes in the first direction.

According to a non-claimed example, the plurality of pins may include a first pin disposed at an inner side and a second pin disposed at an outer side, wherein the first pin and the second pin have different diameters.

According to embodiments of the present invention, it is possible to obtain a camera actuator applicable to an ultra-slim, ultra-miniature, and high-resolution camera, and a camera device including the same. In addition, it is possible to obtain a camera actuator capable of precisely performing zooming and auto focusing (AF) while alignment between lens groups is maintained, and a camera device including the same.

While the present invention is open to various modifications and alternative embodiments, specific embodiments thereof will be described and shown by way of example in the accompanying drawings. However, it should be understood that there is no intention to limit the present invention to the particular embodiments disclosed, and on the contrary, the present invention is to cover all modifications, equivalents, and alternatives falling within the scope of the appended claims.

It should be understood that, although the terms including ordinal numbers such as first, second, and the like may be used herein to describe various elements, the elements are not limited by the term. These terms are only used for the purpose of distinguishing one element from another element. For example, without departing from the scope of the present invention, a second element could be termed a first element, and similarly a first element could be also termed a second element. The term "and/or" includes any one or all combinations of a plurality of associated listed items.

In the case that one component is described as being "connected" or "linked" to another component, it may be connected or linked to the corresponding component directly or other components may be present therebetween. On the other hand, in the case that one component is described as being "directly connected" or "directly linked" to another component, it should be understood that other components are not present therebetween.

It is to be understood that terms used herein are for the purpose of the description of particular embodiments and not for limitation. A singular expression includes a plural expression unless the context clearly indicates otherwise. It will further be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless defined otherwise, all the terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. It will further be understood that the terms, such as those defined in commonly used dictionaries, should be interpreted as having meanings that are consistent with their meanings in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined otherwise herein.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, and the same or corresponding elements will be given the same reference numbers regardless of drawing symbols, and redundant descriptions will be omitted.

<FIG> is a perspective view illustrating an example of a camera device, <FIG> is a perspective view illustrating the camera shown in <FIG> from which a shield can is removed, and <FIG> is a plan view of the camera shown in <FIG>.

Referring to <FIG>, a camera device <NUM> may include one or more camera modules. For example, the camera device <NUM> may include a first camera module 1000A and a second camera module 1000B. The first camera module 1000A and the second camera module 1000B may be covered by a certain shield can <NUM>.

Referring to <FIG>, <FIG> together, the first camera module 1000A may include one or more actuators. For example, the first camera module 1000A may include a first actuator <NUM> and a second actuator <NUM>.

The first actuator <NUM> may be electrically connected to a circuit board <NUM> of a first group, the second actuator <NUM> may be electrically connected to a circuit board <NUM> of a second group, and although not shown, the circuit board <NUM> of the second group may be electrically connected to the circuit board <NUM> of the first group. The second camera module 1000B may be electrically connected to a circuit board <NUM> of a third group.

The first actuator <NUM> may be a zoom actuator or an auto focusing (AF) actuator. For example, the first actuator <NUM> may support one or more lenses and may move the lenses according to a control signal of a certain control unit to perform an AF function or a zooming function.

The second actuator <NUM> may be an optical image stabilizer (OIS) actuator.

The second camera module 1000B may include a fixed focal length lens disposed in a certain barrel (not shown). The fixed focal length lens may be referred to as a "single focal length lens" or a "single lens.

The second camera module 1000B may be disposed in a certain housing (not shown) and may include an actuator (not shown) capable of driving a lens unit. The actuator may be a voice coil motor, a micro actuator, a silicon actuator, or the like and may be applied as various types such as a capacitive type, a thermal type, a bimorph type, and an electrostatic force type, but the present invention is not limited thereto.

Next, <FIG> is a perspective view of the first camera module shown in <FIG>, and <FIG> is a side cross-sectional view of the first camera module shown in <FIG>.

Referring to <FIG>, the first camera module 1000A may include the first actuator <NUM> configured to perform a zooming function and an AF function and the second actuator <NUM> disposed at one side of the first actuator <NUM> and configured to perform an OIS function.

Referring to <FIG>, the first actuator <NUM> may include an optical system and a lens driving unit. For example, at least one of a first lens assembly <NUM>, a second lens assembly <NUM>, a third lens assembly <NUM>, and a guide pin <NUM> may be disposed in the first actuator <NUM>.

In addition, the first actuator <NUM> may include a coil driving unit <NUM> and a magnet driving unit <NUM> to perform a high-magnification zooming function.

For example, the first lens assembly <NUM> and the second lens assembly <NUM> may be moving lenses which are moved through the coil driving unit <NUM>, the magnet driving unit <NUM>, and the guide pin <NUM>, and the third lens assembly <NUM> may be a fixed lens, but the present invention is not limited thereto. For example, the third lens assembly <NUM> may perform a function of a focator for forming an image of light at a specific position, and the first lens assembly <NUM> may perform a function of a variator for re-forming the image formed by the third lens assembly <NUM>, which is the focator, at a different position. Meanwhile, in the first lens assembly <NUM>, due to many changes in distance to a subject or an image distance, a change in magnification may be large, and the first lens assembly <NUM> that is the variator may play an important role in a change in focal length or magnification of an optical system. Meanwhile, an image point, at which an image is formed by the first lens assembly <NUM> that is the variator, may be slightly different according to positions. Accordingly, the second lens assembly <NUM> may perform a function of compensating a position of an image formed by the variator. For example, the second lens assembly <NUM> may perform a function of a compensator for accurately forming an image point, at which an image is formed by the first lens assembly <NUM> that is the variator, at an actual position of an image sensor <NUM>.

For example, the first lens assembly <NUM> and the second lens assembly <NUM> may be driven by an electromagnetic force generated by an interaction between the coil driving unit <NUM> and the magnet driving unit <NUM>. That is, the magnet driving unit <NUM> may be fixed to at least one of the first lens assembly <NUM> and the second lens assembly <NUM> to move together with at least one of the first lens assembly <NUM> and the second lens assembly <NUM>. This may vary according to at least one of a movement direction and a movement distance of at least one of the first lens assembly <NUM> and the second lens assembly <NUM>. To this end, a Hall sensor may be disposed in the coil driving unit <NUM> and may detect a position of the magnet driving unit <NUM> that moves together with at least one of the first lens assembly <NUM> and the second lens assembly <NUM>.

The certain image sensor <NUM> may be disposed perpendicular to an optical axis direction of parallel light.

Next, the second actuator <NUM> may include a shake correction unit <NUM> disposed in a housing and a prism unit <NUM> disposed on the shake correction unit <NUM>. The shake correction unit <NUM> may include a shaper member <NUM> and a lens member <NUM> and may include a magnet driving unit <NUM> and a coil driving unit 72C. Here, the lens member <NUM> may be used interchangeably with a liquid lens, a fluid lens, a variable prism, or the like. A shape of the lens member <NUM> may be reversibly deformed by pressure applied to a surface of the lens member <NUM>, thereby changing an optical path of light passing through the lens member <NUM>. For example, the lens member <NUM> may include a fluid surrounded by an elastic membrane. The shaper member <NUM> may be combined with, connected to, or in direct contact with the lens member <NUM>, and pressure may be applied to the lens member <NUM> due to movement of the shaper member <NUM>. Thus, the shape of the lens member <NUM> may be reversibly deformed, thereby changing an optical path of light passing through the lens member <NUM>. As will be described below, the movement of the shaper member <NUM> may occur due to an interaction between the magnet driving unit <NUM> and the coil driving unit 72C.

As described above, an OIS can be implemented by controlling an optical path of light passing through the lens member <NUM>, thereby minimizing the occurrence of a decentering or tilting phenomenon and providing superior optical characteristics.

Since <FIG> and descriptions with reference thereto are provided for the purpose of describing the overall structure and operation principle of the camera device according to the embodiment of the present invention, embodiments of the present invention are not limited to the detailed configuration shown in <FIG>.

Hereinafter, a first actuator for implementing a zooming function and an AF function according to embodiments of the present invention will be described in more detail.

<FIG> is a perspective view of the first actuator according to an embodiment of the present invention. Here, an axis refers to an optical axis direction or a direction parallel thereto. For reference, according to <FIG>, although the first actuator <NUM> for implementing a zooming function and an AF function is illustrated as including the first lens assembly <NUM>, the second lens assembly <NUM>, and the third lens assembly <NUM>, since embodiments of the present invention mainly relate to the structures of the first lens assembly <NUM> and the second lens assembly <NUM> which are the moving lenses, the illustration and description of the third lens assembly <NUM>, which is the fixed lens, will be omitted below.

Referring to <FIG>, the first actuator <NUM> includes a base (not shown), the first lens assembly <NUM>, the second lens assembly <NUM>, and the third lens assembly (not shown).

The first lens assembly <NUM> and the second lens assembly <NUM> are disposed in the base (not shown), and the first lens assembly <NUM> includes a first lens group <NUM> and a first lens support unit <NUM>. The first lens group <NUM> may be accommodated in the first lens support unit <NUM> and may be fixed to the first lens support unit <NUM>. The second lens assembly <NUM> includes a second lens group <NUM> and a second lens support unit <NUM>. The second lens group <NUM> may be accommodated in the second lens support unit <NUM> and fixed to the second lens support unit <NUM>.

The first lens assembly <NUM> and the second lens assembly <NUM> are disposed along a Z-axis, and the first actuator <NUM> further includes a first driving unit <NUM> and a second driving unit <NUM>. The first driving unit <NUM> and the second driving unit <NUM> are disposed symmetrically with each other at both sides of the first lens assembly <NUM> and the second lens assembly <NUM>. For example, the first driving unit <NUM> may move the first lens assembly <NUM>, and the second driving unit <NUM> may move the second lens assembly <NUM>. To this end, the first driving unit <NUM> may include a first magnet driving unit <NUM> which is disposed on an outer surface of the first lens support unit <NUM> of the first lens assembly <NUM> and moves together with the first lens support unit <NUM> and a first coil driving unit <NUM> which is disposed apart from and faces the first magnet driving unit <NUM>, is connected to a circuit board (not shown), and is fixed to the base (not shown) or the like. The second driving unit <NUM> may include a second magnet driving unit <NUM> which is disposed on an outer surface of the second lens support unit <NUM> of the second lens assembly <NUM> and moves together with the second lens support unit <NUM> and a second coil driving unit <NUM> which is disposed apart from and faces the second magnet driving unit <NUM>, is connected to a circuit board (not shown), and is fixed to the base (not shown) or the like. Here, the first magnet driving unit <NUM> and the second magnet driving unit <NUM> may be the magnet driving unit <NUM> of <FIG>, and the first coil driving unit <NUM> and the second coil driving unit <NUM> may be the coil driving unit <NUM> of <FIG>. Here, the first magnet driving unit <NUM> and the second magnet driving unit <NUM> may be disposed directly on the first lens support unit <NUM> and the second lens support unit <NUM>, respectively. The first magnet driving unit <NUM> and the first coil driving unit <NUM> may electromagnetically interact with each other by a current applied to the first coil driving unit <NUM>, and thus, the first magnet driving unit <NUM> may move together with the first lens support unit <NUM>. Similarly, the second magnet driving unit <NUM> and the second coil driving unit <NUM> may electromagnetically interact with each other by a current applied to the second coil driving unit <NUM>, and thus, the second magnet driving unit <NUM> may move together with the second lens support unit <NUM>.

In this case, the first lens support unit <NUM> and the second lens support unit <NUM> may move along pins <NUM> fixed to the base (not shown) or the like in advance. Here, the base or the like may refer to a member for accommodating the first lens support unit <NUM> and the second lens support unit <NUM>. Accordingly, the pins <NUM> can guide movement of the first lens support unit <NUM> and the second lens support unit <NUM>, thereby preventing decentering in which a spherical center between lens groups deviates from an optical axis, a phenomenon in which a lens is tilted, and a phenomenon in which central axes of the lens group and an image sensor are not aligned.

More specifically, the pins <NUM> may include a first pin <NUM> and a second pin <NUM> which are spaced apart from each other in parallel to an optical axis. In the present specification, the pin <NUM> may be used interchangeably with a rod or a shaft. The pin <NUM> may be made of at least one selected from among of plastic, a glass-based epoxy, polycarbonate, a metal, and a composite material.

Meanwhile, the first lens support unit <NUM> and the second lens support unit <NUM> may include areas for fixing the first lens group <NUM> and the second lens group <NUM> and areas for supporting the first magnet driving unit <NUM> and the second magnet driving unit <NUM>, respectively. Hereinafter, the area for fixing the lens group will be referred to as a lens housing, and the area for supporting the magnet driving unit will be referred to as a magnet housing. The lens housing and the magnet housing of each of the first lens support unit <NUM> and the second lens support unit <NUM> may be integrally formed or may be separately formed and then coupled. According to an embodiment of the present invention, protrusions into which the first pin <NUM> and the second pin <NUM> are fitted may be formed on each of the first lens support unit <NUM> and the second lens support unit <NUM>.

Hereinafter, for convenience of description, the first lens assembly will be mainly described in more detail with reference to <FIG>. However, the same structure or an appropriately modified structure may also be applied to the second lens assembly. Referring to <FIG>, a lens housing <NUM> of the first lens support unit <NUM> functions as a barrel or a body tube, and the first lens group <NUM> may be mounted therein. Here, the first lens group <NUM> may be a moving lens group and may include one or more lenses. The first magnet driving unit <NUM> may be disposed on a magnet housing <NUM> of the first lens support unit <NUM>.

According to an embodiment of the present invention, a mounting method of the first magnet driving unit <NUM> may be a vertical mounting method. For example, both an N pole and an S pole of the first magnet driving unit <NUM> may be mounted to face the first coil driving unit <NUM>. Accordingly, the N pole and the S pole of the first magnet driving unit <NUM> may be disposed to correspond to an area in which a current flows in a Y-axis direction perpendicular to a ground surface in the first coil driving unit <NUM>.

When a magnetic force (MF) is applied in an X-axis direction at the N pole of the first magnet driving unit <NUM> and a current flows in a direction opposite to a Y-axis in the first coil driving unit <NUM>, an electromagnetic force acts in a direction parallel to a Z-axis direction according to Fleming's left hand rule.

Alternatively, when an MF is applied in a direction opposite to the X-axis at the S pole of the first magnet driving unit <NUM> and a current flows in the Y-axis direction perpendicular to a ground surface in the first coil driving unit <NUM>, an electromagnetic force acts in the Z-axis direction according to Fleming's left hand rule.

In this case, since the first coil driving unit <NUM> is in a fixed state, the first lens assembly <NUM> in which the first magnet driving unit <NUM> is disposed may be moved in a direction parallel to a direction opposite to the Z-axis. An electromagnetic force may be controlled in proportion to a current applied to the first coil driving unit <NUM>.

Here, one or more protrusions 114P into which the pin <NUM> is fitted may be formed in the magnet housing <NUM>, and accordingly, the movement of the first lens assembly <NUM> may be guided in an optical axis direction. For example, a hole may be formed in the protrusion 114P, and the pin <NUM> may be fitted into the hole.

As described above, when the pin <NUM> fixed to the base (not shown) or the like is fitted into the hole formed in the protrusion 114P of the magnet housing <NUM>, a contact area between the pin <NUM> and the magnet housing <NUM> can be minimized to minimize the weight of the magnet housing <NUM>, thereby reducing frictional resistance. Accordingly, there is a technical effect of preventing occurrence of frictional torque during zooming to improve a driving force and reduce power consumption.

According to an embodiment of the present invention, the protrusion 114P and the hole may further be formed at the other side opposite to one side at which the first driving unit <NUM> is disposed among both sides of the magnet housing <NUM>, and the pin <NUM> may be fitted into the protrusion 114P. Accordingly, the movement of the first lens assembly <NUM> can be guided at both sides, thereby preventing a lens from being tilted or a central axis thereof from being misaligned and precisely guiding the first lens assembly <NUM> to be parallel to the optical axis direction.

Meanwhile, as described above, according to an embodiment of the present invention, each of the first coil driving unit <NUM> and the second coil driving unit <NUM> may include a yoke and a coil.

<FIG> is a schematic cross-sectional view of the driving unit according to an embodiment of the present invention, and <FIG> is a schematic cross-sectional view of a driving unit according to another embodiment of the present invention. For convenience of description, the first driving unit <NUM> will be mainly described, but the same structure may be applied to the second driving unit <NUM>.

Referring to <FIG> and <FIG>, the first coil driving unit <NUM> includes a yoke part <NUM> and a coil <NUM> disposed on the yoke part <NUM>. In this case, a Hall sensor HS may further be disposed inside the coil <NUM>, and the Hall sensor HS may detect a position of the first magnet driving unit <NUM> by sensing a distribution of a surrounding magnetic field. The coil <NUM> and the Hall sensor HS may be disposed on a circuit board <NUM>. Here, the circuit board <NUM> may include a circuit board having an electrically connectable line pattern, such as a rigid printed circuit board (rigid PCB), a flexible PCB, or a rigid flexible PCB. The circuit board <NUM> may be connected to a certain power supply (not shown) to apply power to the coil <NUM> and the Hall sensor HS.

The yoke part <NUM> may be made of a magnetic metal. Accordingly, when a current is applied to the coil <NUM>, an electromagnetic force may be generated between the first magnet driving unit <NUM> and the coil <NUM>, and an MF may also be generated between the first magnet driving unit <NUM> and the yoke part <NUM>. Here, the MF generated between the first magnet driving unit <NUM> and the yoke part <NUM> may be a mutual attractive force. A propulsion force for moving the first magnet driving unit <NUM> together with the first lens assembly <NUM> in an arrow direction is generated by the electromagnetic force between the first magnet driving unit <NUM> and the coil <NUM> and the MF between the first magnet driving unit <NUM> and the yoke part <NUM>.

Since both of the first lens assembly <NUM> and the first magnet driving unit <NUM> move, hereinafter, both of the first lens assembly <NUM> and the first magnet driving unit <NUM> are collectively referred to as a "moving assembly.

Meanwhile, according to the trend of ultra-slim, ultra-small, and high-resolution camera devices, there are restrictions on a propulsion force for moving the moving assembly and a movement distance thereof. That is, a magnitude of an attractive force between the first magnet driving unit <NUM> and the yoke part <NUM> may vary according to the material, size, and thickness of the yoke part <NUM>, and accordingly, a propulsion force for moving the moving assembly may vary.

For example, in <FIG>, when the yoke part <NUM> is made of a weak magnetic material, since an attractive force between the first magnet driving unit <NUM> and the yoke part <NUM> is weak, it may be difficult to obtain a sufficient propulsion force for moving the moving assembly. In particular, for high-magnification zooming, the moving assembly needs to move a certain distance or more, but when a propulsion force is low, a required movement distance may not be secured. On the other hand, when the yoke part <NUM> is made of a ferromagnetic material, since an attractive force between the first magnet driving unit <NUM> and the yoke part <NUM> is strong, it is possible to obtain a sufficient propulsion force for moving the moving assembly, but a distribution of an attractive force of the yoke part <NUM> may be non-uniform. Thus, a frictional force according to movement of the moving assembly may not be uniformly distributed. When a frictional force is non-uniform, it may be difficult to precisely control movement of the moving assembly. In addition, both cases in which the yoke part <NUM> is made of a weak magnetic material and is made of a ferromagnetic material, since a distribution of a magnetic field according to movement of the moving assembly is non-uniform, precise sensing and control may be difficult.

In an embodiment of the present invention, in order to solve such problems, the coil <NUM> is disposed on the yoke part <NUM>, and the yoke part <NUM> includes a first yoke <NUM>-<NUM> and a second yoke <NUM>-<NUM> disposed on the first yoke <NUM>-<NUM>. That is, the second yoke <NUM>-<NUM> is disposed between the first yoke <NUM>-<NUM> and the coil <NUM>.

In this case, magnetism of the first yoke <NUM>-<NUM> may be stronger than that of the second yoke <NUM>-<NUM>. For example, permeability of the first yoke <NUM>-<NUM> may be greater than that of the second yoke <NUM>-<NUM>. Preferably, the permeability of the first yoke <NUM>-<NUM> may be <NUM>,<NUM> times or more, preferably <NUM>,<NUM> times or more, and more preferably <NUM>,<NUM> times or more the permeability of the second yoke <NUM>-<NUM>. For example, the permeability of the first yoke <NUM>-<NUM> may be <NUM> or more, preferably <NUM> or more, more preferably <NUM> or more, still more preferably <NUM> or more, and yet still more preferably <NUM>,<NUM> or more, and the permeability of the second yoke <NUM>-<NUM> may be <NUM> or less and preferably <NUM> or less. For example, the first yoke <NUM>-<NUM> may be made of a ferromagnetic material, and the second yoke <NUM>-<NUM> may be made of a weak magnetic material. Preferably, the first yoke <NUM>-<NUM> may include a ferritic metal, and the second yoke <NUM>-<NUM> may include an austenitic metal.

Accordingly, an attractive force may act between the first magnet driving unit <NUM> and the yoke part <NUM>, and a repulsive force may act between the first yoke <NUM>-<NUM> and the second yoke <NUM>-<NUM>. Since ferromagnetism of the first yoke <NUM>-<NUM> is canceled due to the repulsive force between the first yoke <NUM>-<NUM> and the second yoke <NUM>-<NUM>, and weak magnetism of the second yoke <NUM>-<NUM> is reinforced, the yoke part <NUM> may have an intermediate characteristic between a ferromagnetic material and a weak magnetic material.

That is, a large propulsion force can be obtained as compared with a case in which the yoke part <NUM> is made of only a weak magnetic material, thereby increasing a movement distance of the moving assembly and implementing high-magnification zooming. In addition, since distributions of an attractive force and an MF of the coil <NUM> are uniform as compared with a case in which the yoke part <NUM> is made of only a ferromagnetic material, a frictional force according to a position of the moving assembly can be uniformly controlled, thereby increasing the reliability of position sensing and control of the moving assembly.

In particular, according to an embodiment of the present invention, when the second yoke <NUM>-<NUM> having relatively weak magnetism is disposed between the first yoke <NUM>-<NUM> having relatively strong magnetism and the coil <NUM>, the second yoke <NUM>-<NUM> can cancel a magnetic field of the first yoke <NUM>-<NUM> having strong magnetism, which faces the first magnet driving unit <NUM>, and thus, an MF in the yoke part <NUM> can be uniformly distributed. Accordingly, even when a position of the moving assembly is changed according to movement of the moving assembly, a uniform frictional force acts to the moving assembly. In addition, according to an embodiment of the present invention, when the second yoke <NUM>-<NUM> having relatively weak magnetism is disposed between the first yoke <NUM>-<NUM> having relatively strong magnetism and the coil <NUM>, loss of an MF of the coil <NUM> can be prevented, thereby increasing the sensing sensitivity for a position of the moving assembly.

As described above, when the first yoke <NUM>-<NUM> having a characteristic of a ferromagnetic material, the second yoke <NUM>-<NUM> having a characteristic of a weak magnetic material, and the coil <NUM> are sequentially disposed, due to the first yoke <NUM>-<NUM> having the characteristic of the ferromagnetic material, it is possible to obtain a propulsion force capable of implementing a movement distance sufficient to implement high-magnification zooming, and due to the second yoke <NUM>-<NUM> having the characteristic of the weak magnetic material, the magnetism of the first yoke <NUM>-<NUM> is partially canceled, and an MF is uniformly distributed throughout the yoke part <NUM>, thereby obtaining precise sensing and control performance.

In this case, a thickness of at least one of the first yoke <NUM>-<NUM> and the second yoke <NUM>-<NUM> may be <NUM> or more and <NUM> or less. In particular, when the thickness of the second yoke <NUM>-<NUM> is less than <NUM>, it may be difficult to cancel an MF of the first yoke <NUM>-<NUM>. In <FIG>, all of the first yoke <NUM>-<NUM>, the second yoke <NUM>-<NUM>, and the circuit board <NUM> are illustrated as having the same thickness, but the present invention is not limited thereto. A propulsion force required to move the moving assembly may vary according to a frictional force of the moving assembly, and the thickness of the first yoke <NUM>-<NUM>, the second yoke <NUM>-<NUM>, and the circuit board <NUM> may be adjusted according to the required propulsion force. For example, when the lens assembly is guided by a pin type shown in <FIG> and <FIG>, a frictional force may be small as compared with a case in which the lens assembly is guided by a ball type (to be described below with reference to <FIG>). When a frictional force is low, a distance between the movable assembly and the first yoke <NUM>-<NUM> may be adjusted to be longer as compared with a case in which a frictional force is high. That is, the distance between the movable assembly and the first yoke <NUM>-<NUM> may be adjusted through a method of adjusting the thickness of the circuit board <NUM> to be increased or a method of adjusting the thickness of the second yoke <NUM>-<NUM> to be increased.

Meanwhile, according to an embodiment of the present invention, a width of the second yoke <NUM>-<NUM> may be greater than or equal to a width of the first yoke <NUM>-<NUM>. Accordingly, since the second yoke <NUM>-<NUM> is disposed between the first yoke <NUM>-<NUM> and the coil <NUM>, the ferromagnetism of the first yoke <NUM>-<NUM> may not directly affect the coil <NUM>.

Although the structure of the first lens assembly <NUM> has been mainly described, embodiments of the present invention are not limited thereto, and a yoke part of the second coil driving unit included in the second lens assembly <NUM> may also have the same structure.

Meanwhile, the camera modules including an actuator for an OIS and an actuator for AF or zooming have been mainly described, and in particular, an example of a pin type has been described in which the lens assembly of the first actuator <NUM> performing a zooming function or an AF function is guided by a guide pin has, but the present invention is not limited thereto. An actuator performing a zooming function or an AF function may be a ball type guided by a ball.

<FIG> is a perspective view of an actuator for AF or zooming according to another embodiment of the present invention. <FIG> is a perspective view illustrating the actuator according to the embodiment shown in <FIG> from which some components are omitted, and <FIG> is an exploded perspective view illustrating the actuator according to the embodiment shown in <FIG> from which some components are omitted.

Referring to <FIG>, an actuator <NUM> according to the embodiment may include a base <NUM>, a circuit board <NUM> disposed outside the base <NUM>, a driving unit <NUM>, and a third lens assembly <NUM>.

<FIG> is a perspective view illustrating the base <NUM> and the circuit board <NUM> being omitted in <FIG>. Referring to <FIG>, the actuator <NUM> according to the embodiment may include a first guide part <NUM>, a second guide part <NUM>, a first lens assembly <NUM>, a second lens assembly <NUM>, a driving unit <NUM>, and the driving unit <NUM>.

The driving unit <NUM> and the driving unit <NUM> may each include a coil or a magnet.

For example, when each of the driving unit <NUM> and the driving unit <NUM> includes the coil, the driving unit <NUM> may include a first coil part 2141b and a first yoke 2141a, and the driving unit <NUM> may include a second coil part 2142b and a second yoke 2142a. According to an embodiment of the present invention, at least one of the first yoke 2141a and the second yoke 2142a may have the structure of the above-described yoke part according to the embodiment of the present invention. That is, at least one of the first yoke 2141a and the second yoke 2142a includes two yoke layers having different magnetisms, and magnetism of the yoke layer disposed relatively far from the coil may be greater than that of the yoke layer disposed relatively close to the coil.

On the other hand, the driving unit <NUM> and the driving unit <NUM> may each include the magnet.

Referring to <FIG>, the actuator <NUM> according to the embodiment may include the base <NUM>, the first guide part <NUM>, the second guide part <NUM>, the first lens assembly <NUM>, the second lens assembly <NUM>, and the third lens assembly <NUM>.

For example, the actuator <NUM> according to the embodiment may include the base <NUM>, the first guide part <NUM> disposed at one side of the base <NUM>, the second guide part <NUM> disposed at the other side of the base <NUM>, the first lens assembly <NUM> corresponding to the first guide part <NUM>, the second lens assembly <NUM> corresponding to the second guide part <NUM>, first balls <NUM> disposed between the first guide part <NUM> and the first lens assembly <NUM> (see <FIG>), and second balls (not shown) disposed between the second guide part <NUM> and the second lens assembly <NUM>.

In addition, the actuator <NUM> according to the embodiment may include the third lens assembly <NUM> disposed in front of the first lens assembly <NUM> in an optical axis direction.

Referring to <FIG>, the actuator <NUM> according to the embodiment may include the first guide part <NUM> disposed adjacent to a first sidewall of the base <NUM> and the second guide part <NUM> disposed adjacent to a second sidewall of the base <NUM>.

The first guide part <NUM> may be disposed between the first lens assembly <NUM> and the first sidewall of the base <NUM>.

The second guide part <NUM> may be disposed between the second lens assembly <NUM> and the second sidewall of the base <NUM>. The first sidewall and the second sidewall of the base <NUM> may be disposed to face each other.

According to an embodiment, in a state in which the first guide part <NUM> and the second guide part <NUM> precisely and numerically controlled are coupled in the base <NUM>, when the lens assemblies are driven, frictional torque is reduced to reduce frictional resistance, thereby obtaining technical effects of improving a driving force, reducing power consumption, and improving control characteristics during zooming.

Accordingly, according to an embodiment, during zooming, it is possible to minimize frictional torque and also prevent a phenomenon in which a lens is decentered or tilted or central axes of a lens group and an image sensor are not aligned, thereby providing a combined technical effect of considerably improving image quality or resolution.

In particular, according to the present embodiment, since the first guide part <NUM> and the second guide part <NUM>, which are assembled by being formed separately from the base <NUM>, are separately adopted without arranging a guide rail on the base itself, there is a special technical effect capable of preventing a gradient from occurring in an injection direction.

In an embodiment, the first guide part <NUM> and the second guide part <NUM> may be injection-molded along an X-axis and may have an injection length that is less than that of the base <NUM>. In this case, when rails are disposed on the first guide part <NUM> and the second guide part <NUM>, there are technical effects of minimizing the occurrence of a gradient during injection and lowering a possibility that a straight line of the rail is twisted.

More specifically, <FIG> is a perspective view of the first lens assembly <NUM> in the actuator according to the embodiment shown in <FIG>, and <FIG> is a perspective view illustrating the first lens assembly <NUM> shown in <FIG> from which some components are removed.

Briefly referring to <FIG>, the actuator <NUM> according to the embodiment may include the first lens assembly <NUM> moving along the first guide part <NUM> and the second lens assembly <NUM> moving along the second guide part <NUM>.

Referring again to <FIG>, the first lens assembly <NUM> may include a first lens barrel 2112a in which a first lens <NUM> is disposed and a first driving unit housing 2112b in which a driving unit <NUM> is disposed. The first lens barrel 2112a and the first driving unit housing 2112b may be a first housing, and the first housing may have a barrel or body tube shape. The driving unit <NUM> may be a magnet driving unit but is not limited thereto, and a coil may be disposed in some cases.

In addition, the second lens assembly <NUM> may include a second lens barrel (not shown) in which a second lens (not shown) is disposed and a second driving unit housing (not shown) in which a driving unit (not shown) is disposed. The second lens barrel (not shown) and the second driving unit housing (not shown) may be a second housing, and the second housing may have a barrel or body tube shape. The driving unit may be a magnet driving unit but is not limited thereto, and a coil may be disposed in some cases.

The driving unit <NUM> may correspond to two first rails <NUM>.

In an embodiment, driving may be performed using one or more balls. For example, the actuator <NUM> according to the embodiment may include the first balls <NUM> disposed between the first guide part <NUM> and the first lens assembly <NUM> and the second balls (not shown) disposed between the second guide part <NUM> and the second lens assembly <NUM>.

For example, according to an embodiment, the first balls <NUM> may include one or more first-first balls 2117a disposed at an upper side of the first driving unit housing 2112b and one or more first-second balls 2117b disposed at a lower side of the first driving unit housing 2112b.

In an embodiment, the first-first ball 2117a of the first balls <NUM> may move along a first-first rail 2212a which is one of the first rails <NUM>, and the first-second ball 2117b of the first balls <NUM> may move along a first-second first rail 2212b which is the other one of the first rails <NUM>.

According to an embodiment, since the first guide part includes the first-first rail and the first-second rail, the first-first rail and the first-second rail guide the first lens assembly <NUM>, thereby providing a technical effect of increasing the accuracy of optical axis alignment with the second lens assembly <NUM> when the first lens assembly <NUM> moves.

Referring to <FIG>, in an embodiment, the first lens assembly <NUM> may include first assembly grooves 2112b1 in which the first balls <NUM> are disposed. The second lens assembly <NUM> may include second assembly grooves (not shown) in which the second balls are disposed.

The plurality of first assembly grooves 2112b1 of the first lens assembly <NUM> may be formed. In this case, a distance between two first assembly grooves 2112b1 among the plurality of first assembly grooves 2112b1 may be greater than a thickness of the first lens barrel 2112a in an optical axis direction.

In an embodiment, the first assembly groove 2112b1 of the first lens assembly <NUM> may have a V shape. In addition, the second assembly groove (not shown) of the second lens assembly <NUM> may have a V shape. In addition to the V shape, the first assembly groove 2112b1 of the first lens assembly <NUM> may have a U shape or a shape in contact with the first ball <NUM> at two or three points. In addition to the V shape, the second assembly groove (not shown) of the first lens assembly <NUM> may have a U shape or a shape in contact with the second ball at two or three points.

Referring to <FIG> and <FIG>, in an embodiment, the first guide part <NUM>, the first ball <NUM>, and the first assembly groove 2112b1 may be disposed on a virtual straight line in a direction from the first sidewall toward the second sidewall. The first guide part <NUM>, the first ball <NUM>, and the first assembly groove 2112b1 may be disposed between the first sidewall and the second sidewall.

Next, <FIG> is a perspective view of the third lens assembly <NUM> in the actuator according to the embodiment shown in <FIG>.

Referring to <FIG>, in an embodiment, the third lens assembly <NUM> may include a third housing <NUM>, a third barrel, and a third lens <NUM>.

In an embodiment, since the third lens assembly <NUM> has a barrel recess 2021r formed in an upper end portion of the third barrel, a thickness of the third barrel of the third lens assembly <NUM> can be uniformly set, and there can be a combined technical effect of reducing an amount of injection products to increase the accuracy of numerical management.

In addition, according to an embodiment, the third lens assembly <NUM> may include a housing rib 2021a and a housing recess 2021b in the third housing <NUM>.

In an embodiment, since the third lens assembly <NUM> includes the housing recess 2021b in the third housing <NUM>, there is a combined technical effect of reducing an amount of injection products to increase the accuracy of numerical management, and concurrently, since the third lens assembly <NUM> includes the housing rib 2021a in the third housing <NUM>, there is a combined technical effect capable of securing strength.

Hereinafter, a detailed structure of a second actuator will be described in more detail.

<FIG> is a perspective view of the second actuator of the camera device shown in <FIG> in one direction, and <FIG> is a perspective view of the second actuator of <FIG> in another direction. <FIG> is a perspective view of a second circuit board and a driving unit of the second actuator of <FIG>. <FIG> is a partially exploded perspective view of the second actuator of <FIG>. <FIG> is a perspective view illustrating the second actuator of <FIG> from which the second circuit board is removed.

Referring to <FIG>, since a shake correction unit <NUM> is disposed under a prism unit <NUM>, it is possible to overcome a limitation on a size of a lens in a lens assembly of an optical system when an OIS is implemented, thereby securing a sufficient amount of light.

A second circuit board <NUM> may be connected to a certain power supply (not shown) to apply power to a coil driving unit 72C. The second circuit board <NUM> may include a circuit board having an electrically connectable line pattern, such as a rigid PCB, a flexible PCB, or a rigid flexible PCB.

The coil driving unit 72C may include one or more unit coil driving units and may include a plurality of coils. For example, the coil driving unit 72C may include a first unit coil driving unit 72C1, a second unit coil driving unit 72C2, a third unit coil driving unit 72C3, and a fourth unit coil driving unit (not shown).

In addition, the coil driving unit 72C may further include Hall sensors (not shown) to detect a position of a magnet driving unit <NUM> to be described below. For example, the first unit coil driving unit 72C1 may include a first Hall sensor (not shown), and the third unit coil driving unit 72C3 may include a second Hall sensor (not shown). Although not shown, the coil driving unit 72C included in a second actuator <NUM> may also be disposed together with a yoke part. Here, the yoke part may be the yoke part according to the embodiment of the present invention. That is, the yoke part may include a first yoke and a second yoke disposed on the first yoke, the coil driving unit 72C may be disposed on the second yoke, and magnetism of the first yoke may be greater than that of the second yoke.

Meanwhile, as described above, a shaper member <NUM> may be disposed on a lens member <NUM>, and a shape of the lens member <NUM> may be deformed according to movement of the shaper member <NUM>. In this case, the magnet driving unit <NUM> may be disposed on the shaper member <NUM>, and the coil driving unit 72C may be disposed in a housing <NUM>.

Referring to <FIG>, the housing <NUM> may have a certain opening <NUM>, through which light may pass, formed in a housing body <NUM>. The housing <NUM> may include housing side portions 1214P which extend upward from the housing body <NUM> and have holes <NUM> formed such that the coil driving unit 72C is disposed therein.

For example, the housing <NUM> may include a first housing side portion 1214P1 which extends upward from the housing body <NUM> and has a hole 1214H1 formed such that the coil driving unit 72C is disposed therein and a second housing side portion 1214P2 has a hole 1214H2 formed such that the coil driving unit 72C is disposed therein.

According to an embodiment, the coil driving unit 72C may be disposed in the housing side portion 1214P, the magnet driving unit <NUM> may be disposed on the shaper member <NUM>, the shaper member <NUM> may be moved by an electromagnetic force between the coil driving unit 72C and the magnet driving unit <NUM> according to a voltage applied to the coil driving unit 72C. Accordingly, the shape of the lens member <NUM> may be reversibly deformed, and an optical path of light passing through the lens member <NUM> may be changed, thereby implementing an OIS.

More specifically, the shaper member <NUM> may include a shaper body having a hole, through which light may pass, formed therein, and protrusions extending laterally from the shaper body. The lens member <NUM> may be disposed under the shaper body, and the magnet driving unit <NUM> may be disposed on the protrusion of the shaper member <NUM>. For example, a part of the magnet driving unit <NUM> may be disposed on the protrusion disposed on one side surface of the shaper member <NUM>, and a remaining part thereof may be disposed on the protrusion disposed on the other side surface of the shaper member <NUM>. In this case, the magnet driving unit <NUM> may be disposed to be coupled to the shaper member <NUM>. For example, a groove is formed in the protrusion of the shaper member <NUM>, and the magnet driving unit <NUM> may be fitted into the groove.

Meanwhile, a fixed prism <NUM> may be a right-angled prism and may be disposed inside the magnet driving unit <NUM> of the shake correction unit <NUM>. In addition, a certain prism cover <NUM> may be disposed above the fixed prism <NUM> so that the fixed prism <NUM> may be tightly coupled to the housing <NUM>.

Meanwhile, a camera module according to an embodiment of the present invention is subjected to a process of, after the assembly of each component is completed, testing whether the module is abnormal, including an open-short (OS) test, a color test, a pixel test, and the like. When the performance of a module is evaluated, since a signal is received from an image sensor to evaluate characteristics of the module, actually, whether a camera module is abnormal is checked by supplying an operation signal and power to an electronic component on which the camera module is mounted.

A socket is provided in which a camera module may be seated, the camera module is seated inside this socket, and then, pins for receiving power and control signals of the camera module are connected to electrically conductive terminals of the socket, thereby performing such a test. In general, the socket is provided to have a structure that is openable or closable, when the camera module is tested, the socket is opened to seat the camera module on a module seating portion provided inside the socket, and then, the socket is closed to connect the pins of the camera module and the terminals of the socket.

Meanwhile, there is a problem in that various types of sockets should be provided according to a shape of a test object such as a camera module.

Hereinafter, a socket for a test device capable of easily testing test objects having various shapes will be described.

<FIG> is a perspective view of a socket for a test device according to an embodiment of the present invention. <FIG> is an exploded perspective view of the socket for a test device according to the embodiment of the present invention. <FIG> is a top view of the socket for a test device according to the embodiment of the present invention. <FIG> is a side view of the socket for a test device according to the embodiment of the present invention. <FIG> is a bottom view of the socket for a test device according to the embodiment of the present invention. <FIG> is a cross-sectional view of the socket for a test device according to the embodiment of the present invention.

First, referring to <FIG> and <FIG>, a socket <NUM> for a test device according to the embodiment includes a first plate <NUM>, a second plate <NUM>, a plurality of pins <NUM> disposed between the first plate <NUM> and the second plate <NUM>, and a shape frame <NUM> disposed in the second plate <NUM>.

The socket <NUM> for a test device according to the embodiment may further include a third plate <NUM> disposed between the first plate <NUM> and the second plate <NUM> and a housing <NUM>. Detailed descriptions thereof will be provided below.

In addition, it should be understood that some components of the components may be excluded and additional components are not excluded.

A first direction (Z' direction) is a direction from the second plate <NUM> toward the first plate <NUM>, a second direction (Y' direction) is a direction perpendicular to the first direction (Z' direction), and a third direction (X' direction) is a direction perpendicular to both the first direction (Z' direction) and the second direction (Y' direction). In the present specification, descriptions will be provided based on the above-described directions.

The first plate <NUM> may be disposed at one side in the first direction (Z' direction). For example, the first plate <NUM> may be positioned at an upper side of the socket <NUM> for a test device.

The first plate <NUM> may include a plurality of first holes h1. The plurality of first holes h1 may be disposed to correspond to the plurality of pins <NUM> positioned in the second plate <NUM>. In an embodiment, the plurality of first holes h1 may be disposed to overlap the plurality of pins <NUM> in the first direction (Z' direction). Accordingly, the plurality of pins <NUM> may be lifted to pass through the first holes h1. For example, when the plurality of pins <NUM> are lifted, one ends of the plurality of pins <NUM> may pass through the first holes h1 to be positioned above an upper surface of the first plate <NUM>.

Referring to <FIG>, the first plate <NUM> may include a non-seating portion which overlaps an opening area <NUM> of the shape frame <NUM>, which will be described below, in the first direction (Z' direction) by the plurality of pins <NUM> and a seating portion which overlaps a non-opening area <NUM> in the first direction (Z' direction) and in which the test object (not shown) is accommodated.

Specifically, the test object (not shown) may be disposed above the first holes h1. In an embodiment, the first holes h1 may include first-first holes <NUM> through which the pins <NUM> pass and first-second holes <NUM> through which the pins <NUM> do not pass. The first-first holes <NUM> may overlap the non-seating portion in the first direction (Z' direction), and the first-second holes <NUM> may form the seating portion and thus overlap the seated portion in the first-direction (Z' direction).

In addition, the test object (not shown) may be accommodated in the seating portion. In other words, the test object (not shown) may be disposed above the first-second hole <NUM>. In addition, the test object (not shown) may overlap the first-second holes <NUM> in the first direction (Z' direction). However, since the pins <NUM> pass through the firs-first holes <NUM>, the test object is not accommodated on the pins <NUM> in the non-seating portion.

In addition, in the non-seating portion, the pins <NUM> may be disposed to surround a portion of the test object (not shown). Due to such a configuration, the test object (not shown) may be seated on the seating portion and concurrently fixed and supported by the pins <NUM> of the non-seating portion. Thereby, it is possible to prevent a decrease in reliability due to a test. However, it should be understood that the first-first hole <NUM> and the first-second hole <NUM> may be changed according to the shape frame <NUM>.

The first plate <NUM> may include coupling parts <NUM> at one sides thereof. The coupling part <NUM> may include a coupling hole 3113a and a coupling member 3113b disposed in the coupling hole 3113a. The plurality of coupling parts <NUM> may be provided, and the first plate <NUM> may be coupled to the second plate <NUM> and the third plate <NUM>, which will be described below, through the coupling parts <NUM>. A coupling method may include screw coupling as shown in the drawings, but the present invention is not limited thereto.

Referring again to <FIG> and <FIG>, the first plate <NUM> may have various shapes. For example, the first plate <NUM> may have a quadrangular shape shown in the drawings. However, the present invention is not limited thereto, and the first plate <NUM> may have a shape such as a circular shape or a polygonal shape.

In addition, the pin <NUM> may not pass though a central portion of the first plate <NUM> in a plan view of X'-Y'. That is, the first hole h1 may not be positioned at the central portion of the first plate <NUM> in the plane view of X'-Y'.

As described above, according to an embodiment, in the first plate <NUM>, the number of the first holes h1 may be removed by as much as a basic size (minimum size) of the test object (not shown). Accordingly, it is possible to reduce manufacturing costs and improve the reliability of the first plate.

In addition, a through-hole may be formed in an area of the first plate <NUM> corresponding to the basic size (minimum size) of the above-described test object (not shown). Since the through-hole does not overlap the plurality of pins <NUM> in the first direction (Z' direction), the pins <NUM> may not be disposed therein. However, heat generated when the test object (not shown) is disposed in the area to perform a test can be easily discharged to the outside. Accordingly, it is possible to improve the reliability of the test object and the first plate. The second plate <NUM> and the third plate <NUM> to be described below may further include through-holes corresponding to the above-described through-hole.

The second plate <NUM> may be disposed apart from the first plate <NUM> in the first direction (Z' direction). The second plate <NUM> may be disposed under the first plate <NUM>.

In addition, the second plate <NUM> may correspond to the shape of the first plate <NUM>. For example, the second plate <NUM> may have the same quadrangular shape as the first plate <NUM>. However, as described above, as the shape of the first plate <NUM> is changed, the shape of the second plate <NUM> may also be changed.

In addition, the second plate <NUM> may include a first cavity CV1 and a second cavity CV2. The first cavity CV1 may be formed in one side of the second plate <NUM>, and the second cavity CV2 may be formed in the other side of the second plate <NUM>. That is, the first cavity CV1 may be formed to face the second cavity CV2 in the second plate <NUM>. In addition, the first cavity CV1 and the second cavity CV2 may have the same area in the plan view of X'-Y'. However, the present invention is not limited thereto, and an area of the first cavity CV1 in the plan view of X'-Y' may be smaller than an area of the second cavity CV2 in the plan view of X'-Y'.

In addition, the first cavity CV1 may be formed to overlap the second cavity CV2 in the first direction (Z' direction). The plurality of pins <NUM> may be disposed in the first cavity CV1. On the other hand, the shape frame <NUM> may be disposed in the second cavity CV2.

Due to such a configuration, a space in which the test object may be seated on the first plate <NUM> may be provided according to the shape frame <NUM> disposed in the second cavity CV2. In other words, even when a shape (for example, a size or form) of the test object is changed, the test object can be easily seated only by changing a shape of the shape frame <NUM>. Detailed descriptions thereof will be provided below.

In addition, the first cavity CV1 may include a first area S1 in which the plurality of pins <NUM> are disposed and a second area S2 disposed inside the first area S1. The second area S2 may not overlap the plurality of first holes h1 and a plurality of second holes h2 in the first direction (Z' direction). The second area S2 may be an area corresponding to a basic position or size of the above-described test object (not shown). Accordingly, the above-described through-hole may be formed in the second area S2. Detailed descriptions thereof will be provided below with reference to <FIG>.

In addition, the second plate <NUM> may include the plurality of second holes h2. The plurality of second holes h2 may be disposed to correspond to the plurality of first holes h1 described above. In an embodiment, the plurality of second holes h2 may be disposed to overlap the plurality of first holes h1 in the first direction (Z' direction). In addition, the plurality of second holes h2 may be disposed to overlap the plurality of pins <NUM> in the first direction (Z' direction). Accordingly, the plurality of pins <NUM> may pass through the second plate <NUM> through the second holes h2. For example, the other ends of the plurality of pins <NUM> may pass through the second holes h2 to be positioned under a lower surface of the second plate <NUM>.

In addition, the plurality of second holes h2 may be positioned inside the first cavity CV1 or the second cavity CV2.

The plurality of pins <NUM> may be positioned in the first cavity CV1. The plurality of pins <NUM> may at least partially overlap the second plate <NUM> in the second direction (Y' direction) or the third direction (X' direction).

Each of the plurality of pins <NUM> may include a body portion <NUM>, a first extension portion <NUM> extending from the body portion <NUM> toward the first plate <NUM>, and a second extension portion <NUM> extending from the body portion <NUM> toward the second plate <NUM>.

First, a length of the body portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be less than a length of the first extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). In addition, the length of the body portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be less than a length of the second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction).

Due to such a configuration, as the pin <NUM> moves in the first direction (Z' direction) (for example, moves up and down), the first extension portion <NUM> may provide the seating portion according to a shape of the test object positioned on the first plate <NUM>. As a result, it is possible to easily hold the test object and concurrently easily perform a test irrespective of the shape of the test object.

In addition, in this case, the body portion <NUM> may be positioned in contact with a lower surface of the first hole h1 of the first plate or a lower surface of a third hole h3 of the third plate under the seating portion. In addition, the body portion <NUM> may be positioned in contact with an upper surface of the second hole h2 of the second plate under the non-seating portion.

The first extension portion <NUM> may have a structure that protrudes from the body portion <NUM> toward the first hole h1 or the third hole h3. A shape of the first extension portion <NUM> may correspond to that of the first hole h1 or the third hole h3. Accordingly, the plurality of pins <NUM> may easily pass through the first holes h1 or the third holes h3.

The second extension portion <NUM> may protrude from the body portion <NUM> toward the second plate <NUM>. That is, the second extension portion <NUM> may extend from the body portion <NUM> toward the second hole h2 and overlap the second hole h2 in the first direction (Z' direction).

The second extension portion <NUM> may at least partially overlap the opening area <NUM> in the second direction (Y' direction) or the third direction (X' direction). However, the second extension portion <NUM> may not overlap the non-opening area <NUM> in the second direction (Y' direction) or the third direction (X' direction).

Thus, the second extension portion <NUM> may be positioned above the non-opening area <NUM>. Accordingly, as described above, the non-seating portion and the seating portion may be formed on the first plate <NUM> by the shape frame <NUM>.

The shape frame <NUM> may be disposed in the second cavity CV2. The shape frame <NUM> may at least partially overlap the second holes h2 in the first direction (Z' direction).

In an embodiment, the shape frame <NUM> may include the opening area <NUM> and the non-opening area <NUM>. The pins <NUM> passing through the second holes h2 may be positioned in the opening area <NUM>. The non-opening area <NUM> may support the pin <NUM> such that a lower end of the pin <NUM> is not positioned in the second cavity CV2. That is, the non-opening area <NUM> may lift the pin <NUM>.

Referring to <FIG> and <FIG>, the pins <NUM> passing through the second holes h2 may overlap the opening area <NUM> in the second direction (Y' direction) or the third direction (X' direction). On the other hand, the pins <NUM> disposed in the second holes h2 may not overlap the non-opening area <NUM> in the second direction (Y' direction) or the third direction (X' direction) and may overlap the non-opening area <NUM> in the first direction (Z' direction). That is, the plurality of pins <NUM> may pass through the first plate <NUM> in the first direction (Z' direction) to correspond to the shape frame <NUM>. In addition, the plurality of pins <NUM> may pass through one or more of the plurality of first holes h1 and the plurality of second holes h2 according to the opening area <NUM> and the non-opening area <NUM> of the shape frame <NUM>.

Due to such a configuration, the pins <NUM> in the non-opening area <NUM> may protrude upward from the first plate <NUM>, thereby forming the non-seating portion. On the other hand, the pins <NUM> in the opening area <NUM> may protrude downward from the second plate <NUM> and may not protrude upward from the first plate <NUM>, thereby forming the seating portion.

The pins <NUM> may be lifted upward from the first plate <NUM> by the shape frame <NUM>. In addition, the pins <NUM> may be lowered downward from the second plate <NUM> by the shape frame <NUM>. Due to the above-described lifting and lowering, a shape of the seating portion may be formed to correspond to a shape of the opening area <NUM>. In other words, when the shape of the opening area <NUM> is formed to correspond to the test object (not shown), the shape of the seating portion may correspond to the shape of the test object (not shown). That is, even when the shape of the test object (not shown) is diverse, when the shape of the opening area <NUM> is changed to correspond to the shape of the test object, the test object can be easily seated on the first plate without changing other components (first plate, second plate, third plate, pins, and the like).

Referring again to <FIG> and <FIG>, the third plate <NUM> may be disposed between the first plate <NUM> and the second plate <NUM>. In addition, the third plate <NUM> may be disposed between the first plate <NUM> and the body portion <NUM> of the pin <NUM>.

The third plate <NUM> may include a plurality of third holes h3. The plurality of third holes h3 may overlap the first holes h1, the second holes h2, and the pins <NUM> in the first direction (Z' direction). A length of the third hole h3 in the second direction (Y' direction) or the third direction (X' direction) may be less than a length of the body portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). Due to such a configuration, the body portion <NUM> may be positioned under the third hole h3.

Since the third plate <NUM> is disposed between the body portion <NUM> and the first plate <NUM>, even when the pin <NUM> is lifted, a position of the pin <NUM> may be maintained through the third hole h3 such that the pin <NUM> is not tilted in the second direction (Y' direction) or the third direction (X' direction). Accordingly, in the socket for a test device according to the embodiment, a shape of the non-seating portion or the seating portion is prevented from being changed by the tilt of the pin <NUM>, thereby improving the seating and fixing of the test object.

Referring to <FIG>, as described above, in an area overlapping the opening area <NUM> of the shape frame <NUM> in the first direction (Z' direction), the pin <NUM> may be lowered (k2). In an area overlapping the non-opening area <NUM> of the shape frame <NUM> in the first direction (Z' direction), the pin <NUM> may be lifted (k1).

A test object <NUM> may be seated on the area in which the pin <NUM> is lowered. Here, the test object <NUM> may be the entirety or portion of the camera module described with reference to <FIG>. That is, since a seating portion SR overlaps the opening area <NUM> in the first direction (Z' direction) and the pin <NUM> is lowered, the first extension portion <NUM> may be positioned under an upper surface of the first plate <NUM>. In other words, in the seating portion SR, the pin <NUM> may not pass through the first plate <NUM>. In addition, the upper surface of the first plate <NUM> is planarized to easily support the test object <NUM>.

On the other hand, since the non-seating portion VSR overlaps the non-opening area <NUM> in the first direction (Z' direction) and the pin <NUM> is lifted by the shape frame <NUM>, the first extension portion <NUM> may be positioned on the upper surface of the first plate <NUM> and the second extension portion <NUM> may be positioned on the lower surface of the second plate <NUM>. That is, in the non-seating portion VSR, the pin <NUM> may not pass through the second plate <NUM>. In the non-seating portion VSR, the pin <NUM> may pass through the first plate <NUM>.

Accordingly, in the socket for a test device according to the embodiment, even when the test object <NUM> is changed, a test can be performed only by changing or replacing the shape frame <NUM> at a lower side. That is, in the socket for a test device according to the embodiment, parts may be quickly and easily replaced according to a camera module, thereby improving test operation efficiency.

In addition, as described above, a portion of the second extension portion <NUM> of the pin <NUM> may overlap the opening area <NUM> in the second direction (Y' direction) or the third direction (X' direction). In addition, a portion of the first extension portion <NUM> of the pin <NUM> may pass through the first plate <NUM>, and one end thereof may be positioned on the upper surface of the first plate <NUM>. However, the second extension portion <NUM> of the pin <NUM> may not pass through the second plate <NUM> under the seating portion SR, and the other end thereof may be positioned in the second hole h2 of the second plate <NUM>. Accordingly, a lower surface of the socket for the test device is maintained to be flat, thereby minimizing position movement in the housing to be described below.

In addition, in an embodiment, a width W1 of the body portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be greater than a width W2 of the first extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). Furthermore, the width W1 of the body portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be greater than a width W3 of the second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). Due to such a configuration, even when the pin <NUM> is lifted, the highest point and the lowest point may be fixed so that the seating portion and the non-seating portion may be easily formed.

In addition, the width W2 of the first extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be the same as the width W3 of the second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). Due to such a configuration, it is possible to easily provide the shape of the seating portion to correspond to the shape of the shape frame <NUM>, and it is possible to minimize an error between the shape frame and the seating portion.

A length L1 of the body portion <NUM> in the first direction (Z'-direction) may be less than a length L2 of the first extension portion <NUM> in the first direction (Z' direction). In addition, the length L1 of the body portion <NUM> in the first direction (Z'-direction) may be different from a length L3 of the second extension portion <NUM> in the first direction (Z' direction). In an embodiment, the length L1 of the body portion <NUM> in the first direction (Z'-direction) may be less than the length L3 of the second extension portion <NUM> in the first direction (Z' direction). Accordingly, even though a length of the first cavity CV1 in the first direction (Z' direction) is short, a lifting range of the pin <NUM> may be increased.

In an embodiment, a ratio between the length L1 of the body portion <NUM> in the first direction (Z'-direction) and a length L0 of the pin <NUM> in the first direction (Z'-direction) may be in a range of <NUM>:<NUM> to <NUM>:<NUM>. Since the ratio is in a range of <NUM>:<NUM> to <NUM>:<NUM>, the formation of the seating portion/non-seating portion according to the lifting of the pin <NUM> can be easily changed, and the reliability of the pin <NUM> can be improved.

In addition, the length L2 of the first extension portion <NUM> in the first direction (Z' direction) may be greater than the length L3 of the second extension portion <NUM> in the first direction (Z' direction). Accordingly, even when the pin <NUM> is lifted by being supported by the shape frame <NUM>, strength applied to a lower portion thereof is improved, thereby improving the reliability of the pin.

In addition, the length L3 of the second extension portion <NUM> in the first direction (Z' direction) may be greater than a minimum length L4 of the second plate <NUM> in the first direction (Z' direction). The minimum length L4 of the second plate <NUM> in the first direction (Z' direction) may be the same as a length of the second hole h2 in the first direction (Z' direction).

In addition, the length L3 of the second extension portion <NUM> in the first direction (Z' direction) may be less than lengths (L4+L5) of the second hole h2 and the second cavity CV2 in the first direction (Z' direction). Accordingly, a lowermost portion of the second extension portion <NUM> may be positioned in the second cavity CV2 and may not be positioned under a lowermost surface of the second plate <NUM>. Accordingly, even when the socket for the test device is easily seated on a flat plane surface and is pressed in the housing, the pressing may not damage to the pin <NUM>.

As described above, the first cavity CV1 may include the first area S1 in which the plurality of pins <NUM> are disposed and the second area S2 disposed inside the first area S1. The second area S2 may not overlap the plurality of first holes h1 and the plurality of second holes h2 in the first direction (Z' direction). The second area S2 may be an area corresponding to the basic position or size of the test object <NUM>.

The first area S1 may at least partially overlap the non-seating portion VSR in the first direction (Z' direction). In addition, the second area S2 may at least partially overlap the seating portion SR in the first direction (Z' direction). However, it should be understood that the first area S1 and the second area S2 may not overlap the seating portion SR and the non-seating portion VSR in the first direction (Z' direction) according to the shape of the shape frame <NUM>.

As described above, the second area S2 may be variably changed according to the basic size of the test object <NUM>. For example, the second area S2 may also be positioned outside the first area S1 according to the shape of the test object.

<FIG> are views for describing a specific example of a socket for a test device according to an embodiment.

Specifically, <FIG> is a top view of a socket for a test device and illustrates a seating portion SR2 and a non-seating portion VSR2, and <FIG> is a plan view of a shape frame <NUM> and illustrates an opening area 3141b and a non-opening area 3142b.

Referring to <FIG>, it can be seen that the opening area 3141b corresponds to a shape of the seating portion SR2, and the non-opening area 3142b corresponds to a shape of the non-seating portion VSR2. In the non-seating portion VSR2, pins <NUM> pass through a first plate <NUM> and protrude upward, and in the seating portion SR2, the pins <NUM> do not pass through the first plate <NUM>.

Similarly, <FIG> is a top view of a socket for a test device and illustrates a seating portion SR3 and a non-seating portion VSR3, and <FIG> is a plan view of a shape frame <NUM> and illustrates an opening area 3141c and a non-opening area 3142c. In addition, FIG. 26a is a top view of a socket for a test device and illustrates a seating portion SR4 and a non-seating portion VSR4, and FIG. 26b is a plan view of a shape frame <NUM> and illustrates an opening area 3141d and a non-opening area 3142d. In addition, FIG. 27a is a top view of a socket for a test device and illustrates a seating portion SR1 and a non-seating portion VSR1, and FIG. 27b is a plan view of a shape frame <NUM> and illustrates an opening area 3141a and a non-opening area 3142a.

Referring to <FIG>, 26a, 26b, 27a, and 27b, it can be seen that the opening areas 3141c, 3141d, and 3141a correspond to shapes of the seating portions SR3, SR4, and SR1, and the non-opening areas 3142c, 3142d, and 3142a correspond to shapes of the non-seating portions VSR3, VSR4, and VSR1. In the non-seating portions VSR3, VSR4, and VSR1, pins <NUM> pass through a first plate <NUM> and protrude upward, and in the seating portions SR3, SR4, and SR1, the pins <NUM> do not pass through the first plate <NUM>.

As described above, the shapes of the seating portion and the non-seating portion may vary according to the shape of the shape frame <NUM>, in particular, the shapes of the opening area and the non-opening area.

<FIG> are views for describing a test using a socket for a test device according to an embodiment of the present invention.

Referring to <FIG>, the socket for a test device according to the embodiment may further include a housing <NUM>.

Specifically, the housing <NUM> may include a first cover <NUM>, a second cover <NUM>, and a connection part <NUM> for connecting the first cover <NUM> and the second cover <NUM>.

The first cover <NUM> may be disposed at an upper side, and a test object may be mounted thereon. The first cover <NUM> may include an open hole Ph. Accordingly, when the test object is a camera module mounted on a mobile terminal, light may be supplied to the camera module through the open hole Ph. Accordingly, the open hole Ph may be provided as a plurality of open holes Ph according to the number of the test objects. For example, when two camera modules are mounted on a mobile terminal, two open holes Ph may be formed as shown in the drawing. However, as described above, the number of the open holes Ph may be changed according to the test object.

In addition, the open hole Ph in the first cover <NUM> may be disposed at the same position as the camera module on the mobile terminal. In addition, a mounting groove may be formed in the first cover <NUM> such that the mobile terminal mounted with the camera module is mounted therein. A jig 3161a corresponding to a shape of the mobile terminal or camera module may be positioned in the mounting groove 3161a.

In addition, the first cover <NUM> may include a connector part 3161b disposed to drive the camera module. However, the connector part 3161b is not limited to being positioned in the first cover <NUM>, and the connector part 3161b may be positioned in the first cover <NUM> or the second cover <NUM>.

In addition, the connector part 3161b is electrically connected to the mobile terminal or the camera module, and an electrical signal for testing whether the camera module operates correctly may pass therethrough. In addition, the connector part 3161b is not limited to the above-described position and may be disposed at one of various positions.

The second cover <NUM> may be positioned to face the first cover <NUM>. For example, the second cover <NUM> may be positioned under the first cover <NUM>.

The second cover <NUM> may have a seating groove SV in which the above-described socket (a configuration including a first plate, a second plate, pins, and a third plate) may be seated. The seating groove SV may be disposed at a position corresponding to the open hole Ph of the first cover <NUM>.

The connection part <NUM> may be in contact with the first cover <NUM> and the second cover <NUM> to couple the first cover <NUM> and the second cover <NUM>. For example, the connection part <NUM> may have a rotatable structure, but the present invention is not limited thereto.

<FIG> shows views of a socket for a test device according to another embodiment of the present invention.

In the socket for a test device according to another embodiment, first holes h1 may have different diameters according to positions. A diameter r1 of a first-first hole hla positioned inside a first plate may be greater than a diameter r2 of a first-second hole hlb positioned outside the first plate. Due to such a configuration, when a seating portion is formed at an inner side, a separation distance between a non-seating portion and a test object can be minimized so that the test object can be easily supported and fixed by pins of the non-seating portion.

Here, the inner side refers to a side in a direction toward a center point C1 of the first plate, and an outer side refers to a side in a direction opposite to the inner side and in a direction away from the center point C1 of the first plate.

The center point C1 of the first plate may be an intersection between a first virtual line OL1 that bisects a first side surface SF1 and a second side surface SF2 facing each other and a second virtual line OL2 that bisects a third side surface SF3 and a fourth side surface SF4 facing each other. The center point C1 may be the center of gravity of the first plate in a plan view of X-Y. For example, when the first plate has a circular shape, a center of a circle may be the center point, and when a shape of the first plate is changed, the center point may be changed correspondingly.

In addition, in the socket for a test device according to another embodiment, it should be understood that, similarly to the first holes h1, diameters of second holes h2 and third holes h3, which overlap the first holes h1 in a first direction (Z' direction), may be changed according to positions.

In addition, the above-described contents may be equally applied to configurations of a second plate, the pins, a third plate, and the like which are not described herein.

<FIG> shows views of a socket for a test device according to still another embodiment of the present invention.

Referring to <FIG>, in the socket for a test device according to still another embodiment, separation distances between first holes h1 may be different according to positions. A separation distance d2 between the first holes h1 positioned inside a first plate may be less than a separation distance d1 between the first holes h1 positioned outside the first plate. Due to such a configuration, when a seating part is formed at an inner side, a shape of the seating portion is finely adjusted, thereby minimizing a separation distance between a test object and a non-seating portion. Accordingly, the test object can be easily supported and fixed by pins in the non-seating portion adjacent to the seating portion.

As described above, the inner side refers to a side in a direction toward a center point C1 of the first plate, and an outer side refers to a side in a direction opposite to the inner side and in a direction away from the center point C1 of the first plate.

In addition, the socket for a test device according to still another embodiment, it should be understood that, similarly to the first holes h1, diameters of second holes h2 and third holes h3, which overlap the first holes h1 in a first direction (Z' direction), may be changed according to positions.

<FIG> shows views of a socket for a test device according to a modified example.

Referring to <FIG>, a width W2' of a first extension portion <NUM> in a second direction (Y' direction) or a third direction (X' direction) may be different from a width W3' of a second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction).

When the width W2' of the first extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) is greater than the width W3' of the second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction), a shape of a shape frame <NUM> may be finely controlled. That is, the number of the second extension portions <NUM> in contact with the shape frame <NUM> may be more precisely controlled.

In addition, on the other hand, the width W2' of the first extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction) may be less than the width W3' of the second extension portion <NUM> in the second direction (Y' direction) or the third direction (X' direction). In this case, a tolerance of a seating portion may be increased so that, even when a size of a test object is slightly changed, the test object may be seated.

According to an embodiment, it is possible to implement a socket for a test device which easily performs a test on test objects having various shapes.

In addition, it is possible to implement a socket for a test device which can easily perform a test only by replacing some components even when a type of a test object is changed.

The various and advantageous advantages and effects of the present invention are not limited to the above description and may be more easily understood in the course of describing specific embodiments of the present invention.

Claim 1:
A camera module comprising:
a lens group (<NUM>);
a lens support unit (<NUM>) configured to accommodate the lens group (<NUM>);
a magnet (<NUM>) disposed on an outer surface of the lens support unit (<NUM>);
a yoke part (<NUM>) that is disposed apart from and faces the magnet (<NUM>); and
a coil (<NUM>) disposed on the yoke part (<NUM>) to face and be spaced apart from the magnet (<NUM>) between the magnet (<NUM>) and the yoke part (<NUM>),
wherein:
all the lens group (<NUM>), the lens support unit (<NUM>), and the magnet (<NUM>) move along an optical axis according to a current applied to the coil (<NUM>);
characterised in that:
the yoke part (<NUM>) includes a first yoke (<NUM>-<NUM>) and a second yoke (<NUM>-<NUM>) disposed on the first yoke (<NUM>-<NUM>);
the second yoke (<NUM>-<NUM>) is disposed between the first yoke (<NUM>-<NUM>) and the coil (<NUM>); and
magnetic permeability of the first yoke (<NUM>-<NUM>) is greater than magnetic permeability of the second yoke (<NUM>-<NUM>).