KR102704763B1 - Lens moving unit and camera module having the same - Google Patents

Abstract

A lens driving device according to the present embodiment comprises: a base; a circuit board installed on an upper side of the base and having a first coil arranged on an upper surface; a bobbin having a second coil wound on an outer peripheral surface and installed so as to be able to rise and fall with respect to an optical axis; a holder member having magnets arranged on different surfaces to face the first and second coils; upper and lower elastic members having one end connected to the bobbin and the other end connected to the holder member to elastically support the bobbin in the direction of the optical axis; a support member connected to the upper elastic member to support movement of the holder member in a direction perpendicular to the optical axis; and at least one first guide unit guiding an installation position of the circuit board on the base; wherein the first guide unit may include a guide protrusion formed protruding from the base; and a through hole formed penetrating at a position corresponding to the guide protrusion of the circuit board.

Description

{Lens moving unit and camera module having the same}

The present embodiment relates to a lens driving device and a camera module having the same.

The camera module may include an optical system comprising a printed circuit board on which an image sensor and an image sensor for transmitting electrical signals are mounted, an infrared blocking filter for blocking infrared light to the image sensor, and at least one lens for transmitting an image to the image sensor. At this time, a lens driving device capable of performing an auto-focusing function and a shake correction function may be installed in the optical system.

The lens driving device can be configured in various ways, but a voice coil unit motor is commonly used. The voice coil unit motor can perform an auto-focusing function by operating through the electromagnetic interaction of a coil unit wound on the outer surface of a bobbin to which a magnet fixed to a housing and a lens barrel are combined. An actuator module of this voice coil motor type can reciprocate in a direction parallel to the optical axis while the bobbin that moves up and down is elastically supported by lower and upper elastic members.

In addition, for shake correction, a coil unit can be additionally installed to form a movement for shake correction through electromagnetic interaction with the magnet.

However, in case of impact, etc., the distance between the coil unit and the magnet may change, which may reduce product reliability.

(Patent Document 1) US 2013-0050828 A1

The present embodiment provides a lens driving device having an improved structure so that a circuit board with a coil unit installed in a constant position can always be installed on a base, while maintaining reliability even in the event of external impact, and improving assembling properties.

A lens driving device according to the present embodiment comprises: a base; a circuit board installed on an upper side of the base and having a first coil arranged on an upper surface; a bobbin having a second coil wound on an outer peripheral surface and installed so as to be able to rise and fall with respect to an optical axis; a holder member having magnets arranged on different surfaces to face the first and second coils; upper and lower elastic members having one end connected to the bobbin and the other end connected to the holder member to elastically support the bobbin in the direction of the optical axis; a support member connected to the upper elastic member to support movement of the holder member in a direction perpendicular to the optical axis; and at least one first guide unit guiding an installation position of the circuit board on the base; wherein the first guide unit may include a guide protrusion formed protruding from the base; and a through hole formed penetrating at a position corresponding to the guide protrusion of the circuit board.

The above first guide unit may be provided in multiple numbers symmetrically with respect to the center of the base and the circuit board.

The above first guide unit can be positioned so as not to interfere with the first coil.

The device may further include a second guide unit that guides the position of the peripheral surface of the base and the circuit board, wherein the second guide unit may include: a first boss that is protrudingly formed at a position close to the outer peripheral surface of the base; and a first groove portion that is formed at a position corresponding to the first boss of the circuit board.

The above first home portion can be formed concavely on the peripheral surface of the circuit board.

The above first boss and the first home portion can be positioned so as not to interfere with the first coil.

The invention further includes a third guide unit that guides the position of the inner surface of the base and the circuit board, wherein the third guide unit may include: a second boss formed to protrude at a position close to the inner surface of the base; and a second groove formed at a position corresponding to the second boss of the circuit board.

The above third guide unit may be arranged in pairs symmetrically with respect to the center of the base and the circuit board.

The above-mentioned support member is composed of a wire member, and two can be installed at each corner of the circuit board and holder member.

The above base includes a first concave portion at a position close to the guide protrusion, and an adhesive material for fixing a circuit board to the first concave portion can be applied.

The base further includes at least one second recessed portion, in which a position detection sensor for detecting a change in magnetic force of a magnet facing the first coil is installed at a position that does not interfere with the first recessed portion; and the second recessed portion can be arranged so as not to interfere with the first recessed portion.

The above circuit board has a shield portion provided at a position facing the first coil, and an adhesive material can be applied to the shield portion.

The above circuit board further includes a plurality of terminal portions on the inner surface, so that the terminal portions and the end of the first coil can be fixed by soldering.

The circuit board may have a position detection sensor mounted on a surface facing the base and inserted into the second concave portion, and the position detection sensor may include a first sensor that detects movement of the holder member in the X-axis direction; and a second sensor that detects movement of the holder member in the Y-axis direction.

A camera module according to the present embodiment may include an image sensor; a printed circuit board on which the image sensor is mounted; and a lens driving device configured as described above.

According to the present embodiment as described above, since a guide means capable of always fixing and connecting the circuit board to the base at an accurate position and a space for applying an adhesive are provided, the position of the circuit board and the position detection sensor can always be accurately fixed, thereby improving product assembly and operational reliability. In addition, the connection between the circuit board and the coil unit can be firmly established.

Fig. 1 is a perspective view of a lens driving device according to the present embodiment.
Figure 2 is a plan view showing a circuit board installed on the upper side of the base.
Figure 3 is a plan view showing the upper surface of the base, and
Figure 4 is a plan view showing the back of the circuit board.

Hereinafter, either the 'first coil (21)' or the 'second coil' may be referred to as the 'first coil' and the other as the 'second coil'. Hereinafter, either the 'terminal portion (28)' or the 'terminal (21a)' may be referred to as the 'first terminal' and the other as the 'second terminal'. Hereinafter, the 'through hole (1200)' may be referred to as a 'hole'. Furthermore, the 'through hole (1200)' may be referred to as the 'first hole' or the 'second hole' to distinguish it from the other 'hole'. Hereinafter, either the 'first groove portion (2200)' or the 'second groove portion (3200)' may be referred to as the 'first groove' and the other as the 'second groove'. Below, one of the 'First Boss (2100)' and 'Second Boss (3100)' can be called the 'First Boss' and the other can be called the 'Second Boss'.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

FIG. 1 is a perspective view of a lens driving device according to the present embodiment, FIG. 2 is a plan view illustrating a circuit board installed on the upper side of a base, FIG. 3 is a plan view illustrating an upper surface of the base, and FIG. 4 is a plan view illustrating a back surface of the circuit board.

A lens driving device according to the present embodiment may be composed of first and second lens driving units, and the first lens driving unit may be a lens driving unit for autofocus, and the second lens driving unit may be a lens driving unit for image stabilization.

The first lens driving unit may include a base (10), a bobbin (30), and a holder member (40).

The base (10) may have at least one circuit board (20) installed on the upper side, and a first coil (21) for operating a second lens driving unit may be installed on the circuit board (20). The first coil (21) may have a coil pattern formed directly on the circuit board (20), or may be formed on a separate FP Coil and laminated and arranged on the circuit board (20). According to the present embodiment, the first coil (21) may include a pattern coil, etc. In addition, a cover member may be further included so that a holder member (40) that forms the outer periphery of the camera module and, as illustrated, supports a plurality of magnets may be arranged on the inside. In addition, the base (10) may be combined with the cover member.

The bobbin (30) can be installed in the inner space of the cover member so as to be reciprocally movable in the direction of the optical axis. The bobbin (30) can have a second coil installed in a coil mounting portion formed on the outer surface thereof, and this second coil can raise and lower the bobbin (30) in a direction parallel to the optical axis by electromagnetic interaction with the plurality of magnets.

The bobbin (30) may have the upper and lower elastic members installed at the upper and lower portions, respectively. The upper elastic member may have one end connected to the bobbin (30) and the other end coupled to the holder member (40). However, this is not limited thereto, and may be coupled to a cover member if necessary. When coupled to the holder member (40), it may be coupled to the upper surface or the lower surface of the holder member (40). The lower elastic member may have one end connected to the bobbin (30) and the other end coupled to the upper surface of the base (10) or the lower surface of the holder member (40). In addition, a protrusion for joining a lower elastic member may be formed on the lower side of the base (10), and a hole or recess may be formed at a corresponding position of the lower elastic member so that the lower elastic member may be fixed by joining them, and rotation may be prevented. In addition, an adhesive member, etc. may be added for firm fixation, and the protrusion and the elastic member may be joined by heat fusion, etc.

Meanwhile, the upper elastic member is provided with two plate springs in a two-part structure, and the lower elastic member is configured as a single body and can serve as a terminal so as to receive current. That is, the current applied through the terminal (21a) is transmitted through the support member (50) described later and transmitted through the two springs of the upper elastic member, and this current can be applied to the second coil wound around the bobbin (30). To this end, the upper elastic member and the second coil can be electrically connected, respectively, by soldering or the like. Here, the upper elastic member includes an outer portion coupled with the holder member (40), an inner portion coupled with the bobbin, and a connecting portion connecting the inner portion and the outer portion, and the inner portion can be electrically connected to both ends of the first coil by soldering or the like. That is, the two springs and the two ends of the second coil can be electrically connected, respectively, by soldering, Ag epoxy, welding, conductive epoxy, etc. However, this is not limited thereto, and conversely, it is also possible for the lower elastic member to be formed in a two-part structure and the upper elastic member to be formed integrally. Alternatively, the upper elastic member can be formed by being separated into four or more parts.

The bobbin (30) can be elastically supported in both directions in the optical axis direction by the upper and lower elastic members. That is, the bobbin (30) is spaced apart from the holder member (40) by a certain distance, so that it can be controlled to move upward and downward around the initial position of the bobbin (30). In addition, the initial position of the bobbin (30) can be controlled to move only upward around the initial position of the bobbin (30) by contacting the lower or upper portion of the holder member (40).

Meanwhile, the second coil may be provided as a ring-shaped coil block coupled to the outer surface of the bobbin (30). However, this is not limited thereto, and the coil may be configured by being wound directly on the outer surface of the bobbin (30). As shown in Fig. 2, the second coil may be installed at a position close to the lower surface of the bobbin (30), and may include a straight surface and a curved surface depending on the shape of the bobbin (30).

Alternatively, the second coil formed by the coil block may be of an angular shape, and may be an octagonal shape. In other words, it may be formed with all straight surfaces without any curved surfaces. This is in consideration of the electromagnetic interaction with the magnets that are arranged oppositely, because if the corresponding surface of the magnet is a plane, the electromagnetic force can be maximized when the surface of the facing second coil is also a plane. However, the present invention is not limited thereto, and depending on the design specifications, the surface of the magnet and the surface of the second coil may be configured as both curved surfaces, both planes, or one curved and the other plane.

In addition, the bobbin (30) may include a first surface formed flat on a surface corresponding to the straight surface and a second surface formed round on a surface corresponding to the curved surface so that the second coil can be coupled to the outer surface, but the second surface may also be a surface formed flat.

The holder member (40) may be configured as a frame having an approximately hexahedral shape. A joining structure for joining upper and lower elastic members may be provided on the upper and lower surfaces of the holder member (40), respectively, and magnets may be installed on the four corners or four sides. At this time, a mounting portion (not shown) may be formed at the location where the magnet is installed. However, this is not limited thereto, and the magnet may be directly bonded and fixed to the inner surface of the holder member (40) without the mounting portion. In this way, when the magnet is directly fixed to the holder member (40), the magnet may be directly bonded and fixed to the side or corner of the holder member (40). In addition, unlike the embodiment, if it is an auto-focusing unit instead of a shake correction unit, only a cover member may be present without a separate holder member (40).

The cover member, which is not shown, may be formed of a metal material that is a ferromagnetic body such as iron. In addition, the cover member may be provided in a square shape when viewed from above so as to completely cover the bobbin (30). At this time, the cover member may be provided in a square shape as shown in FIG. 2, or may be provided in an octagonal shape, although not shown. In addition, when the cover member is in an octagonal shape when viewed from above, if the shape of the magnet arranged at the corner of the holder member (40) is a trapezoidal shape when viewed from above, the magnetic field emitted from the corner of the holder member (40) can be minimized.

The first lens driving unit can be configured as described above, and may be replaced with an optical system that implements an auto-focusing function of a different type in addition to the above configuration. That is, instead of using an auto-focusing actuator of the voice coil motor type, it may be configured with an optical module that uses a single-lens moving actuator or an actuator of a variable refractive index type. That is, the first lens driving unit may use any optical actuator that can perform an auto-focusing function.

Meanwhile, the second lens driving unit is a lens driving unit for image stabilization and may include a first lens driving unit, a base (10), a support member (50), a circuit board (20), and first and second sensors (26)(27).

The configuration of the base (10) is as described above, and as illustrated in FIG. 3, a guide protrusion (1100) and a first concave portion (11) to be described later may be formed. In addition, the guide protrusion (1100) may be positioned close to the first concave portion (11). An adhesive material for fixing the circuit board (20) may be applied to the first concave portion (11). According to the present embodiment, a total of four first concave portions (11) may be formed, and further, the first concave portions (11) may be installed symmetrically with respect to the center of the base (10). In addition, they may be formed at a position that does not interfere with the first coil (21) (see FIG. 2).

In addition, the base (10) may further include at least one second concave portion (13) in which a position detection sensor is installed to detect a change in the magnetic force of a magnet facing the first coil (21) at a location that does not interfere with the first concave portion (11). According to the present embodiment, two second concave portions (13) are provided, and the first and second sensors (26)(27) can be placed or inserted therein, and may be additionally fixed therein using epoxy or the like.

The circuit board (20) may include a first circuit board on which a position detection sensor is installed, and a first coil (21). However, this is not limited thereto, and the first circuit board and the first coil (21) may be configured as a single circuit board. In the case of the present embodiment, the first circuit board and the first coil (21) are configured as separate from each other, and the first coil (21) is formed as a pattern coil or an FP coil, so that the first coil is laminated on the upper surface of the first circuit board and may be connected to each other so as to be electrically conductive. In this case, both ends of the first coil (21) may be electrically conductively fixed to a terminal portion (28) of the circuit board by soldering. That is, as illustrated in FIG. 4, the terminal portion (23) of the first coil (21) and the terminal portion (28) of the circuit board (20) are arranged to overlap each other, and when a total of four first coils (21) are provided, each of the terminal portions (23)(28) may require at least eight terminal portions (23)(28) for soldering. If the terminal of the first coil (21) to which the same signal can be applied among each of the first coils (21) can be shared, the number of terminal portions (23)(28) for soldering may be reduced from eight. In addition, the number of terminal portions may be four or six, but is not limited thereto.

At this time, the circuit board (20) may be provided with an FPCB and may be installed on the upper surface of the base (10). The first coil (21) may shift and/or tilt and/or horizontally move the entire first lens driving unit in a plane direction perpendicular to the optical axis through interaction with the magnet. The first coil (21) is arranged on the circuit board (20) in a pattern coil manner at a position corresponding to the bottom surface of the magnet. For example, when the magnet is installed on each wall surface of the holder member (40), the first coil (21) may be arranged on each corresponding surface portion of the circuit board (20). In the embodiment, four first coils (21) may be arranged facing the magnets, but the present invention is not limited thereto, and two may be arranged facing each other, or at least four or more may be arranged. Additionally, the first coil opposing the magnet may be composed of two instead of one.

Meanwhile, as shown in FIGS. 1 and 4, the circuit board (20) may be provided with a shield (25) facing the first coil (21), and an adhesive material may be applied to the shield (25). That is, according to the present embodiment, a second circuit board (22) may be further laminated on the upper side of the first circuit board, and at this time, the first coil (21) may be formed on the second circuit board (22) and may be electrically connected to the first circuit board. In order to fix the first coil (21) and the second circuit board (22) formed on the second circuit board (22) in this way, the shield (25) may be formed on a corresponding position of the circuit board (20), and a space may be provided in which an adhesive material for fixing the second circuit board (22) to the shield (25) seeps into. The escape portion (25) may be formed at or near the center of the first coil (21). At this time, the gap between the second circuit board (22) and the circuit board (20) may be configured so that it is not formed, so that the adhesive material can permeate into the inside of the escape portion (25). In addition, the circuit board (20) may further include a plurality of terminal portions (28), so that the terminal portions (28) and an end of the first coil (21) or an unillustrated terminal portion of the second circuit board (22) may be electrically connected and/or fixed by soldering.

According to this configuration, when the portion where the terminal (21a) is formed is configured by bending as shown in FIG. 1, the second circuit board (22) laminated on the upper side of the circuit board (20) can be firmly adhered to the upper side of the circuit board (20) by the adhesive material applied to the escape portion (25), so that the occurrence of lifting of the surface contact portion thereof can be prevented, and during the process of bending the portion where the terminal (21a) is formed, the portion other than the bending portion can be suppressed from bending, thereby blocking indirect contact with a driving portion such as a bobbin (30) and minimizing performance defects such as hysteresis.

On the circuit board (20) configured in this manner, a first sensor (26) and a second sensor (27) are mounted on a surface facing the base (10) and inserted into the second concave portion (13, see FIG. 3). The first sensor (26) can detect the movement of the holder member (40) in the first direction or the X-axis direction, and the second sensor (27) can detect the movement of the holder member (40) in the second direction or the Y-axis direction. At this time, the first and second directions are mutually orthogonal directions, which are diagonal directions of the X- and Y-axis directions. Meanwhile, the first and second sensors (26)(27) may also be installed on the second circuit board (22) side. In this case, a through hole is formed at a position corresponding to the first and second sensors (26)(27) of the circuit board (20), so that the first and second sensors (26)(27) can be inserted into the second concave portion (13). At this time, the first and second sensors (26)(27) inserted into the second concave portion (13) can be inserted without a separate adhesive member, or can be fixed in position through an adhesive member such as a bond at the relevant portion.

The position detection sensor configured as described above can be installed on the circuit board (20), but is not limited thereto, and can also be directly arranged and/or mounted on the base (10). The position detection sensor detects the magnetic field of the magnet, and can detect movement in a direction perpendicular to the optical axis of the holder member (40) on which the magnet is installed. According to the present embodiment, as illustrated in FIG. 4, it can be configured with first and second sensors (26)(27), and these are arranged so as not to overlap each other at different positions, so as to detect movement in the X-axis and Y-axis directions perpendicular to the optical axis of the first lens driving unit, or in the first and second directions diagonally.

Meanwhile, in the lens driving device according to the present embodiment, a first stopper (100) may be placed on the upper surface of the holder member (40) to minimize damage to the support member (50) when a sudden external impact occurs.

The first stopper (100) may be formed in multiple protruding portions on the upper surface of the holder member (40) as shown in Fig. 1. According to the present embodiment, the first stopper (100) may be positioned approximately in the center of each surface of the holder member (40). However, this is not limited thereto, and two may be positioned per surface if necessary. The first stopper (100) may be formed in a hexahedral shape, and the upper surface may be configured to be flat.

The support member (50) is composed of a wire member, and two can be installed at each corner of the circuit board (20) and the holder member (40). One end of the support member (50) is coupled to the outer side of the upper elastic member, and the other end can be coupled to the second circuit board (22) or the circuit board (20) or the base (10), and a combination thereof is also possible depending on the case. In addition, when the other end of the support member (50) is coupled or electrically coupled or soldered to the second circuit board (22), a separate hole may not be formed in the second circuit board (22). The embodiment illustrates that a hole (29) is formed as shown in FIG. 4. Meanwhile, the upper elastic member to which the support member (50) is connected is provided in a two-part structure so that power can be supplied through the support member (50) to perform auto-focusing operation. At this time, the support member (50) may be electrically connected to the circuit board (20) and the second circuit board (22), or may be electrically connected to a printed circuit board (not shown) to supply power to the auto focusing unit.

In addition, the lens driving device according to the present embodiment may be provided with a first guide unit (1000) so as to always guide the assembly position of the base (10) and the circuit board (20) at a constant level during the assembly process. At least one or more first guide units (1000) may be provided, and may include a guide protrusion (1100) and a through hole (1200).

The guide protrusion (1100) may be integrally formed by protrusion on the upper surface of the base (10) as illustrated in FIGS. 2 and 3. However, it is not limited thereto, and it is also possible to form it by inserting a pin member, etc. As illustrated, the guide protrusion (1100) may be positioned on an imaginary line connecting the center and the corner portion of the base (10), but the position is not limited thereto, and may also be formed in a cylindrical shape. According to the present embodiment, a total of four guide protrusions (1100) may be formed by protrusion, and these guide protrusions (1100) may be positioned at a predetermined distance from the center of the base (10). Therefore, a plurality of guide protrusions (1100) may be positioned symmetrically with respect to the center of the base (10).

The through hole (1200) is formed through a position corresponding to the guide protrusion (1100), as shown in FIGS. 2 and 4, and may be provided in a shape corresponding to the shape of the guide protrusion (1100). The shape of the through hole (1200) may be circular, and if the guide protrusion (1100) is a polygon including a triangle or a square, it may be provided in a shape corresponding thereto. The through hole (1200) may be formed in the second circuit board (22) and the circuit board (20), or may be formed only in the circuit board (20).

The first guide unit (1000) configured as described above can be placed at a position that does not interfere with the first coil (21). For example, when the first coil (21) is placed on each surface portion of the base (10) and the circuit board (20), the first guide unit (1000) can be placed near the corner.

In addition, according to the present embodiment, a second guide unit (2000) for positioning guide of the periphery of the base (10) and the circuit board (20) may be further included. Alternatively, only the second guide unit (2000) may be included without the first guide unit (1000). The second guide unit (2000) may include a first boss (2100) and a first groove (2200).

The first boss (2100) may be formed to protrude on the upper surface of the base (10), and may be positioned close to the outer surface of the base (10). At this time, only one first boss (2100) may be positioned eccentrically on one end as shown in FIG. 3. Through this configuration, the circuit board (20) may be assembled and connected to the base (10) with a certain directionality. This is to guide the first and second sensors (26) (27) mounted on the circuit board (20) to be assembled at the correct position.

The first groove (2200) may be formed at a position corresponding to the first boss (2100) of the circuit board (20). The first groove (2200) may be formed concavely on the peripheral surface of the circuit board (20) and may be configured to correspond to the shape of the first boss (2100). For example, when the first boss (2100) is cylindrical, the first groove (2200) may be provided in a semicircular shape. In addition, the first boss (2100) and the first groove (2200) may be positioned so as not to interfere with the first coil (21). The first groove (2200) may be formed on the second circuit board (22) and the circuit board (20), or may be formed only on the circuit board (20). Meanwhile, a third guide unit (3000) that guides the position of the inner surface of the base (10) and the circuit board (20) may be further included. However, it is not limited thereto, and it may be configured with only the third guide unit (3000) without the first and second guide units (1000)(2000), and each of these guide units (1000)(2000)(3000) is configured independently and any combination is possible. The third guide unit (3000) may include a second boss (3100) that is formed to protrude at a position close to the inner surface of the base (10) and a second groove portion (3200) that is formed at a position corresponding to the second boss (3100) of the circuit board (20). At this time, the third guide unit (3000) may be arranged to be symmetrical with respect to the center of the base (10) and the circuit board (20), but the position is not limited thereto. In addition, it can be placed on an imaginary line connecting the center and both corners of the base (10) and the circuit board (20). The second groove (3200) can be formed on the second circuit board (22) and the circuit board (20), or can be formed only on the circuit board (20).

Meanwhile, the first lens driving device configured as described above may have the base (10) and the bobbin (30) spaced apart from the initial position by a certain distance. In this case, the upper and lower elastic members may be formed in a flat state without preload, or may be formed in a state with a certain preload. In this case, when power is applied in the initial state where the bobbin (30) is spaced apart from the base (10) by a certain distance, depending on the direction of the applied current, for example, when a constant current is applied, it may rise based on the initial position, or when a reverse current is applied, it may descend based on the initial position.

The camera module may include a lens driving device configured as described above, a lens barrel coupled to a bobbin (30), an image sensor, and a printed circuit board. At this time, the printed circuit board may have the image sensor mounted thereon and may form the bottom surface of the camera module.

The bobbin (30) may include a lens barrel having at least one lens installed inside, and the lens barrel may be formed to be screw-coupled to the inside of the bobbin (30). However, this is not limited thereto, and although not illustrated, the lens barrel may be directly fixed to the inside of the bobbin (30) by a method other than screw-coupled, or one or more lenses may be formed integrally with the bobbin without the lens barrel. The lens may be composed of one piece, or two or more lenses may be configured to form an optical system.

The base (10) may additionally have an infrared blocking filter installed at a position corresponding to the image sensor (11) and may be combined with the holder member (40). In addition, the lower side of the holder member (40) may be supported. A separate terminal member may be installed on the base (10) for electrical connection with the printed circuit board (10), and it is also possible to form the terminal integrally using a surface electrode, etc. Meanwhile, the base (10) may function as a sensor holder for protecting the image sensor, and in this case, a protrusion may be formed in a downward direction along the side of the base (10). However, this is not an essential configuration, and although not illustrated, a separate sensor holder may be configured to be placed on the lower side of the base (10) to perform that role.

Although the embodiments according to the present invention have been described above, they are merely exemplary, and those with ordinary knowledge in the relevant field will understand that various modifications and equivalent embodiments are possible. Accordingly, the true technical protection scope of the present embodiments should be determined by the following patent claims.

10; Base 20; Circuit Board
21; 1st coil 25; escape part
26; 1st sensor 27; 2nd sensor
28; terminal 30; bobbin
40; Holder member 50; Support member
1000; 1st guide unit 1100; Guide projection
1200; 2000 gauge; 2nd guide unit
2100; 1st Boss 2200; 1st Home
3000; 3rd Guide Unit 3100; 2nd Boss
3200; 2nd home section

Claims (20)

base;
A holder member arranged on the above base;
A bobbin placed within the above holder member;
A first coil placed on the above bobbin;
A magnet placed on the above holder member;
A circuit board disposed on the upper surface of the base and including a second coil; and
Including an adhesive member that fixes the circuit board and the base,
The above base includes a protrusion formed protruding on the upper surface of the base and a first boss,
The circuit board includes a hole into which the protrusion is inserted, a first groove formed on an inner edge of the circuit board and in which the first boss is arranged, and a second groove formed on an outer edge of the circuit board.
At least a portion of the first groove of the circuit board includes a shape corresponding to the first boss of the base,
The shortest distance between the hole of the circuit board and the first groove of the circuit board is shorter than the shortest distance between the hole of the circuit board and the second groove of the circuit board,
The above base includes a first concave portion formed in the upper surface of the above base,
At least a portion of the adhesive member is disposed in the first recessed portion of the base,
A lens driving device, wherein the first concave portion of the base includes a region disposed between the protrusion of the base and the first boss of the base. In the first paragraph,
The first boss of the above base includes two bosses spaced apart from each other,
A lens driving device, wherein the first groove of the above circuit board includes two grooves corresponding to the two bosses. In the second paragraph,
When viewed from above, the two bosses of the above base are lens actuators symmetrical around the optical axis. In the first paragraph,
The above base includes a second boss formed protruding on the upper surface of the above base,
The second boss is arranged in the second groove of the above circuit board,
A lens driving device wherein at least a portion of the second groove of the circuit board includes a shape corresponding to the second boss of the base. delete delete In the first paragraph,
A sensor is included that is coupled to the lower surface of the circuit board and detects the magnet.
The above base includes a second concave portion formed in the upper surface of the above base,
The above sensor is placed in the second concave portion of the above base,
A lens driving device in which the first concave portion is spaced apart from the second concave portion. In Article 7,
A lens driving device in which the second concave portion is positioned between the first concave portion and the outer edge of the base. In the first paragraph,
The above circuit board includes a first circuit board arranged on the upper surface of the base, and a second circuit board arranged on the upper surface of the first circuit board and including the second coil,
A lens driving device, wherein each of the first circuit board and the second circuit board includes the hole and the first groove. In Article 9,
The first circuit board includes a body portion arranged between the upper surface of the base and the second circuit board, and a terminal portion extending from an outer edge of the body portion.
The body portion of the first circuit board includes a first terminal formed on an inner edge of the first circuit board,
The terminal portion of the first circuit board is arranged on the outer surface of the base and includes a second terminal,
A lens driving device in which the first terminal of the first circuit board is connected to the second circuit board by soldering. In Article 10,
A lens driving device in which the first concave portion of the above base is positioned corresponding to the first terminal of the first circuit board. In the first paragraph,
The first concave portion of the above base includes four first concave portions,
When viewed from above, the four first concave portions are lens driving devices symmetrical around the optical axis. In the first paragraph,
The above bobbin includes a hole penetrating the bobbin in the optical axis direction,
The above circuit board includes a hollow formed at a position corresponding to the hole of the above bobbin,
A lens driving device in which, when viewed from above, the curvature of the first groove of the circuit board is different from the curvature of the hollow portion of the circuit board. In the first paragraph,
An upper elastic member connecting the upper part of the bobbin and the upper part of the holder member; and
A lens driving device including a lower elastic member connecting the lower part of the bobbin and the lower part of the holder member. In Article 14,
A lens driving device including a wire connecting the upper elastic member and the circuit board. base;
A holder member arranged on the above base;
A bobbin placed within the above holder member;
A first coil placed on the above bobbin;
A magnet placed on the above holder member;
A first circuit board arranged on the upper surface of the above base;
A second circuit board disposed on the upper surface of the first circuit board and including a second coil;
An upper elastic member connecting the holder member and the bobbin;
A wire connecting the upper elastic member and the first circuit board or the upper elastic member and the second circuit board; and
Including an adhesive member that fixes the first circuit board and the base,
The above base includes a protrusion formed protruding on the upper surface of the base and a first boss,
The first circuit board and the second circuit board each include a hole into which the protrusion is inserted, a first groove formed on an inner edge of each of the first circuit board and the second circuit board and in which the first boss is arranged, and a second groove formed on an outer edge of each of the first circuit board and the second circuit board.
At least a portion of the first groove of the first circuit board and the second circuit board includes a shape corresponding to the first boss of the base,
When viewed from above, the shortest distance between the hole of the second circuit board and the first groove of the second circuit board is shorter than the shortest distance between the hole of the second circuit board and the second groove of the second circuit board.
The above base includes a first concave portion formed in the upper surface of the above base,
At least a portion of the adhesive member is disposed in the first recessed portion of the base,
A lens driving device, wherein the first concave portion of the base includes a region disposed between the protrusion of the base and the first boss of the base. In Article 16,
A lens actuator in which the projection of the above base is spaced apart from the first boss of the above base. In Article 16,
The above base includes a second boss that is protruded on the upper surface of the above base and spaced apart from the first boss,
The second boss is arranged in the second groove of the first circuit board and the second circuit board.
A lens driving device, wherein at least a portion of the second groove of the first circuit board and the second circuit board includes a shape corresponding to the second boss of the base. delete printed circuit board;
An image sensor arranged on the above printed circuit board;
A lens driving device according to any one of claims 1 to 4 and claims 7 to 18, arranged on the printed circuit board; and
A camera module including a lens coupled to the bobbin of the lens driving device.