KR20160091578A - Lens moving unit and camera module having the same - Google Patents

Abstract

According to an exemplary embodiment, a lens driving device comprises: a cover member; a bobbin where at least one or more lenses are installed and a coil unit disposed on an outer circumferential surface of the bobbin; a magnet disposed on a corresponding position to the coil unit; a first and a second elastic member, where each one end is coupled to an upper and a lower surface of the bobbin, supporting a movement of the bobbin in an optical axis direction of a lens; a detection unit which detects a parallel direction movement with the optical axis of the bobbin; a damping unit disposed on the bobbin and the first elastic member; and a support unit provided on at least one among the bobbin and the first elastic member to maintain a disposed position of the damping member.

Description

[0001] The present invention relates to a lens driving apparatus and a camera module having the lens driving unit.

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

The camera module includes a printed circuit board on which an image sensor for transmitting electrical signals to the image sensor is mounted, an infrared cut filter for blocking light in the infrared region of the image sensor, and at least one or more lenses As shown in FIG. At this time, the optical system may be provided with a lens driving device capable of performing auto focus function and camera shake correction function.

The lens driving device can be variously configured, and a voice coil unit motor is generally used. The voice coil unit motor can operate by the electromagnetic interaction of the coil unit wound on the outer circumferential surface of the bobbin to which the magnet fixed to the housing and the lens barrel are coupled to perform the auto focusing function. The voice coil motor type actuator module can reciprocate in a direction parallel to the optical axis while the bobbin moving up and down is elastically supported by the lower and first elastic members.

In recent years, there is a need to develop a lens driving device that quickly receives an optimal focusing position by receiving positional information of a bobbin on which a lens is mounted, in order to shorten the auto focusing time of the camera module.

In addition, since the space of the camera module is gradually narrowed according to the demand of the small size of the camera module, the shape of the elastic member is configured to correspond thereto, which may cause a problem in the control of the lens driving device.

The present embodiment can be applied to a camera module having a long lens driving distance, can be applied to a high-resolution small camera module, and provides a lens driving device capable of receiving position information of a bobbin and a camera module having the lens driving device.

The lens driving apparatus according to the present embodiment includes a cover member; A bobbin on which at least one or more lenses are installed and on which coil units are arranged; A magnet disposed at a position corresponding to the coil unit; First and second elastic members each having one end coupled to the upper surface and the lower surface of the bobbin to support movement of the bobbin in the direction of the optical axis of the lens; A sensing unit for sensing movement in a direction parallel to an optical axis of the bobbin; A damping member disposed at a connection portion between the bobbin and the first elastic member; And a supporting unit provided on at least one of the bobbin and the first elastic member so as to hold the damping member in an arranged position.

Wherein the supporting unit includes: a first supporting part formed on the bobbin; And a second support portion which is not in interference with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member so as to surround the periphery of the first support portion.

The first support portion may be disposed at the center of the second support portion, and the damping member may be disposed to be concentric with the first and second support portions.

The first support portion may be disposed at the center of the second support portion, the second support portion may be provided in an arc shape having one side opened, and the damping member may be disposed concentrically with the first and second support portions.

Wherein the supporting unit includes: a first supporting part formed on the bobbin; And a second support portion which is not interfered with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member to pass through a groove formed at the center of the first support portion.

Alternatively, the supporting unit may include a first supporting part formed on the upper side of the bobbin, the first supporting part being formed of a pair of different members and spaced apart from each other by a predetermined distance; And a second support portion which is not in interference with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member so as to pass through a gap formed between the first support portions, The support can be bent at least twice.

The sensing unit may include: a second magnet disposed on an outer circumferential surface of the bobbin; And a position sensor disposed on the side wall of the cover member and on an inner surface facing the second magnet.

Here, the position sensor may be a hall sensor, and the circuit board may be provided with a plurality of terminals exposed to the outside.

The camera module according to the present embodiment includes an image sensor; A printed circuit board on which the image sensor is mounted; And a lens driving apparatus configured as described above.

Since the damping member is provided at the joint portion between the first elastic member and the bobbin provided on the upper surface of the bobbin corresponding to the driving side, the deformation of the damping member due to the vertical movement of the bobbin repeatedly can be minimized, As much as possible.

In addition, since the structure for applying and fixing the damping member more effectively to the size of the limited camera module due to the miniaturization is provided, the assemblability can be improved and the defective product in the production process can be minimized.

In addition, the second magnet is disposed on the outer surface of the bobbin, and the position of the second magnet can be sensed by a position sensor such as a hall sensor, so that the position of the bobbin can be grasped accurately during the auto focusing operation.

1 is an exploded perspective view of a camera module according to the present embodiment,
FIG. 2 and FIG. 3 are schematic views showing an operation state of the lens driving apparatus of the camera module according to the present embodiment,
Fig. 4 is a partially cutaway perspective view of Fig. 1,
5 is a view schematically showing a configuration of a damping member and a support unit according to the first embodiment,
6 is a view schematically showing a configuration of a damping member and a support unit according to a second embodiment,
7 is a view schematically showing a configuration of a damping member and a support unit according to a third embodiment,
8 is a view schematically showing a configuration of a damping member and a support unit according to the fourth embodiment.

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

FIG. 1 is a perspective exploded view of a camera module according to the present embodiment, FIGS. 2 and 3 are schematic views showing an operation state of a lens driving device of a camera module according to the present embodiment, FIG. 4 is a partial cutaway perspective view, 6 schematically shows the configuration of the damping member and the support unit according to the second embodiment, and Fig. 7 is a cross-sectional view of the damping member and the support unit according to the third embodiment. Fig. FIG. 8 is a view schematically showing a configuration of a damping member and a support unit according to a fourth embodiment; FIG. 8 is a view schematically showing the configuration of a damping member and a support unit according to the embodiment;

As shown in FIGS. 1 and 2, the lens driving apparatus according to the present embodiment may include a base 10, a bobbin 20, and a cover member 40. The housing 30 supporting the first magnet 32 to be described later may be disposed further inside the cover member 40 as shown in the figure, although the cover member 40 may form an outer frame of the camera module have.

The base 10 can be engaged with the cover member 40.

The bobbin 20 may be installed to be reciprocally movable in the optical axis direction in the inner space of the cover member 40. The bobbin 20 may be provided with a coil unit 21 on its outer circumferential surface.

The bobbin 20 may be provided with the first and second elastic members 34 and 35 on the upper and lower sides, respectively. The first elastic member 34 may be connected at one end to the bobbin 20 and the other end may be coupled to the cover member 40 or the housing 30 and may be coupled to the housing 30, May be coupled to the top surface or the inner surface of the cover member (40). The second elastic member 35 may be connected at one end to the bobbin 20 and at the other end to the upper surface of the base 10 or the lower surface of the housing 30. A protrusion for coupling the second elastic member 35 may be formed on the upper side of the base 10 and a hole or a recess may be formed at a corresponding position of the second elastic member 35 By the combination of these, the second elastic member 35 can be fixed and the rotation can be prevented. Further, an adhesive or the like may be added for firm fixing.

1 and 2, and the second elastic member 35 is provided in a two-part structure with two springs, so that the current can be applied to the first elastic member 34 It can serve as a terminal. That is, the current applied through the unillustrated terminal is transmitted through the two springs of the second elastic member 35, and this current can be applied to the coil unit 21 wound on the bobbin 20. To this end, the second elastic member 35 and the coil unit 21 may be connected to each other by soldering or the like. That is, both ends of the two springs and the coil unit 21 can be electrically connected to each other by soldering, Ag epoxy, welding, conductive epoxy or the like. However, the present invention is not limited to this, and conversely, it is also possible that the first elastic member 34 is formed in this divided structure and the second elastic member 35 is integrally formed.

The bobbin 20 can be supported in both directions by the first and second elastic members 34 and 35 in the direction of the optical axis. That is, the bobbin 20 is separated from the base 10 by a certain distance, and can be controlled to move upward and downward about the initial position of the bobbin 20. The initial position of the bobbin 20 may be the upper surface of the base 10 and may be controlled to move upward only about the initial position of the bobbin 20.

The coil unit 21 may be a ring-shaped coil block coupled to an outer circumferential surface of the bobbin 20. However, the present invention is not limited to this, and the coil may be directly wound on the outer peripheral surface of the bobbin 20. 3, the coil unit 21 may be installed at a position close to the lower surface of the bobbin 20 and may include a straight surface and a curved surface depending on the shape of the bobbin 20. [ .

Or the coil unit 21 formed of a coil block may have various shapes and may have an octagonal shape. That is, all of them can be formed as straight lines without curved surfaces. In consideration of the electromagnetic action with the first magnet 32 disposed opposite to the first magnet 32, when the corresponding surface of the first magnet 32 is flat, the electromagnetic force can be maximized when the surface of the coil unit 21 facing the surface is flat Because. However, the present invention is not limited to this, and the surface of the first magnet 32 and the surface of the coil unit 21 may be all curved surfaces, all flat, or one curved surface and one flat surface according to design specifications.

The bobbin 20 has a first surface formed to be flat on the surface corresponding to the straight surface and a second surface formed on the surface corresponding to the curved surface so that the coil unit 21 can be coupled to the outer surface. The second surface may also be a flat surface.

The housing 30 may be a substantially hexahedral frame. The upper and lower surfaces of the housing 30 may have a coupling structure for coupling the first and second elastic members 34 and 35 respectively and a first magnet 32 may be installed on the side surface . As shown in FIG. 2, the first magnet mount 31 may be formed with the first magnet 32, and the first magnet 32 may be disposed on the first magnet mount 31, Can be fixed to the member (40). However, the present invention is not limited thereto, and the first magnet 32 may be directly attached and fixed to the inner circumferential surface of the housing 30 without the first magnet seating portion 31. [ When the first magnet 32 is directly fixed to the housing 30, the first magnet 32 may be directly bonded to the side or edge of the housing 30.

In addition, the housing 30 may further include a through hole 33 in addition to the first magnet seating portion 31. The through hole 33 may be formed such that a pair of the through holes 33 are opposed to each other, But may be formed so as to be opposed to each other with respect to the optical axis. That is, the through hole 33 may be formed on the wall surface of the housing 30 facing the second magnet 51, which will be described later, larger than the size of the second magnet 51. At this time, the through holes 33 may be rectangular, or may be formed in a circular or polygonal shape. Alternatively, the first magnet 32 may be installed on the two first magnet mounting portions 31 by using the housing 30 having the four first magnet mounting portions 31 as it is, (33).

Further, unlike the embodiment, there can be only the cover member 40 without a separate housing 30. [ The cover member 40 may be formed of a metal material that is a ferromagnetic material such as iron. In addition, the cover member 40 may be provided in an angular shape as viewed from above so as to cover the bobbin 20 in its entirety. At this time, the cover member 40 may have a rectangular shape as shown in FIG. 1, or may have an octagonal shape, though not shown. If the shape of the first magnet 32 disposed at the edge of the housing 30 is a trapezoidal shape as viewed from above when the cover member 40 is in an octagonal shape as viewed from above, Can be minimized.

The inner yoke 41 may be integrally formed with the cover member 40 at a position corresponding to the receiving groove 20a provided in the bobbin 20. According to the present embodiment, The coil unit 21 may be spaced a certain distance from the coil unit 21 and the other surface may be spaced apart from the bobbin 20 by a certain distance. Further, the inner yoke 41 may be formed at four corners of the housing 30. The inner yoke 41 may be formed to bend inwardly from the upper surface of the cover member 40 in a direction parallel to the optical axis. Although not shown in the inner yoke 41, an escape groove 42 may be formed at a position close to the bent portion. The bending portion formed with the escape groove 42 forms a bottleneck section. Due to the section of the escape groove 42, the upper and lower portions of the bobbin 20 The interference between the inner yoke 41 and the bobbin 20 can be minimized. That is, it is possible to prevent a part of the bobbin 20 from being broken by the interference of the corner portion of the inner yoke when the bobbin 20 moves upward. The inner yoke 41 needs to be spaced apart from the bottom surface of the receiving groove 20a at a reference position by a certain distance. This is because the inner yoke 41, at the highest position when the bobbin 20 reciprocates, And the bottom surface of the receiving groove 20a. The end of the inner yoke 41 may also function as a stopper for regulating movement of the bobbin 20 to a section other than a design specification. The first magnet 32 may be directly bonded to the side or edge of the cover member 40 when the housing 30 is not provided. The magnetization direction of the first magnet 32 may be a surface facing the bobbin 20 and a surface facing the cover member 40. However, the present invention is not limited thereto, and it is also possible that the magnetization direction is changed according to the design.

Meanwhile, the lens driving apparatus according to the present embodiment may be provided with a position sensing unit 50 for sensing the movement of the bobbin 20.

The position sensing unit 50 may include a second magnet 51 and a position sensing sensor 52. Here, the position detection sensor 52 may be installed on the circuit board 60.

The second magnet 51 may be smaller and thinner than the first magnet 32, and may be square as shown. However, the present invention is not limited thereto, and may be configured in various shapes such as a rectangle, a triangle, a polygon, and a circle.

The second magnet 51 may be installed on the outer circumferential surface of the bobbin 20. According to the present embodiment, the second magnet 51 may be fixed to the second magnet mounting portion provided on the bobbin 20 with an adhesive or the like. The second magnet mounting portion may include a rib-shaped guide protruding from the outer circumferential surface of the bobbin 20. However, the present invention is not limited thereto, and a groove portion in which the second magnet 51 can be disposed may be formed have.

The second magnet 51 may be disposed at a position not interfering with the coil unit 21. That is, when the coil unit 21 is installed on the circumferential surface of the bobbin 20 as shown in FIG. 1, the second magnet 51 may be disposed below the bobbin 20, or vice versa. This is to prevent the coil unit 21 from affecting the upward / downward movement of the bobbin 20 in the optical axis direction. However, the second magnet 51 may be disposed between the coil unit 21 and the bobbin 20 or may be disposed on the upper surface of the coil unit 21 facing the cover member 40 or the housing 30 Or may be disposed on the upper side.

The second magnet 51 may be disposed so as not to face the first magnet 32 as shown in FIG. That is, the first magnets 32 are arranged in pairs so that they are parallel to each other and face each other. At this time, when the housing 30 is provided in a quadrangular shape, the second magnet 51 may not be installed at a position facing the two surfaces on which the first magnet 32 is installed. The reason why the second magnet 51 is disposed so as not to face the first magnet 32 is to prevent the change in the magnetic force of the second magnet 51 from interfering with the magnetic force of the first magnet 32, So that the position detection sensor 52 can accurately feed back the movement of the bobbin 20. [ The second magnet 51 may be disposed on the upper or lower surface of the first magnet 32 without facing the first magnet 32. In this case, four first magnets 32 may be disposed on four sides of the housing 30, respectively.

The second magnet 51 may be vertically polarized so that the up and down movement of the second magnet 51 is sensed by the position sensor 52 and the up and down movement of the bobbin 20 Can be grasped accurately.

The circuit board 60 may be disposed so as to correspond to the respective side walls of the bobbin 20 and the housing 30 and / or the cover member 40 as shown in Fig. In the case of this embodiment, a cover member 40 serving as a shield can can be provided, and the circuit board 60 can be brought into contact with or disposed on the side wall of the cover member 40. Further, the circuit board 60 may be contacted or fixed to the outer surface or the inner surface of the cover member 40 or the housing 30, as shown in Fig.

In addition, the circuit board 60 may include a terminal at one end so as to be electrically connected to a printed circuit board on which an image sensor (not shown) is mounted. The coil unit 21 is electrically connected directly to the circuit board 60 to apply a current to the coil unit 21 through the circuit board 60 or the coil unit 21 is divided into two The two lower springs may be electrically connected to the circuit board 60 and electrically connected to the printed circuit board. Various methods such as soldering, conductive epoxy and Ag epoxy can be used for electrical connection. In addition, the circuit board 60 may be electrically connected to a printed circuit board, which is a component of the camera module, to receive external power.

At this time, since the position sensor 52 such as a hall sensor is disposed on the inner surface of the circuit board 60, the position sensor 52 is not exposed to the outside. The through hole 33 formed in the housing 30 may be formed in a shape corresponding to the first magnet seating portion 31 for mounting the first magnet 32 and may be larger than the second magnet 51 And may be provided with a through hole having a width and a height. The circuit board 60 on which the position sensor 52 is disposed may be fixed to the inner surface of the cover member 40. In this case, have. Also, the housing 30 may be absent, and the center of the position sensor 52 and the center of the second magnet 51 may coincide with each other. The center of the sensing part of the position sensor 52 and the center of the second magnet 51 may coincide with each other. In some cases, the centers may not be exactly coincident with each other or may be slightly spaced apart from each other.

According to the present embodiment as described above, since the motion of the bobbin 20 in the optical axis direction can be fed back by using the second magnet 51, the time required for the auto focusing operation can be shortened.

A second magnet 51 smaller than the auto-focusing magnet is attached to the bobbin 20 while the coil unit 21 is wound on the bobbin 20 and the magnetic force of the second magnet 51 is Since the position detecting sensor 52 which can be detected is arranged on one wall surface of the lens driving device, it is possible to perform the auto focusing function more precisely and quickly without worrying about the degradation of the response characteristics.

The center of the position sensing sensor 52 and the center of the second magnet 51 may coincide with each other and the center of the vertical length of the second magnet 51 As shown in FIG. The surface of the second magnet 51 facing the position sensor 52 may be magnetized into two portions to enable position sensing.

The position sensing sensor 52 may be any sensor capable of sensing a position, such as a gyro sensor, an angular velocity sensor, an acceleration sensor, a photo reflector, and a hall sensor. The position sensor 52 may be installed alone or may be mounted on a predetermined circuit board 60. At this time, the circuit board 60 may be exposed to the outside of the cover member 40 or the position sensor 52 may be installed inside the cover member 40. Alternatively, although not shown, the circuit board 60 may be installed on an inner surface or an edge of the cover member 40. [ It is also possible to supply a current to the coil unit 21 wound on the bobbin 20 through the circuit board 60.

The second magnet 51 is attached to the outer wall of the bobbin 20 and the position sensing sensor 52 capable of sensing the magnetic force of the second magnet 51 is disposed on one side wall of the cover member 40 The position of the bobbin 20 can be fed back in real time, and it is possible to perform the auto focusing function more quickly and accurately than the conventional lens driving apparatus.

According to the present embodiment, the damping member 100 may be installed in the connecting portion 37 (see FIG. 1) between the bobbin 20 and the first elastic member 34 configured as described above.

The damping member 100 is used for controlling the oscillation of the bobbin 20 and includes a bobbin 20 corresponding to the moving part of the feedback type lens driving device and a connecting part 37 As shown in FIG. The damping member 100 is installed for gain control and / or phase control in frequency control for autofocusing control.

The damping member 100 according to the present embodiment can be provided with the damping member 100 at the connection portion between the bobbin 20 and the first elastic member 34 corresponding to the movable portion. According to the present embodiment, the damping member 100 may be formed of a material in a gel (GEL) state, and any elastically deformable material including an epoxy may be used.

The support unit 200 may be provided on the bobbin 20 and / or the first elastic member 34 so as to maintain the position of the damping member 100.

According to the present embodiment, the support unit 200 may include a first support portion 210 and a second support portion 220, as shown in FIGS.

The first support part 210 may be integrally formed on the upper side of the bobbin 20 and may be formed in a protrusion shape. The second support portion 220 may be formed at a position corresponding to the first support portion 210 of the first elastic member 34 so as to surround the first support portion 220.

The shape of the first and second supporting portions 210 and 220 may be variously configured. In this embodiment, as shown in FIGS. 5 to 8, the first and second supporting portions 210 and 220 may be configured as four embodiments. However, the present invention is not limited thereto, and any structure can be applied as long as the second support portion 220 surrounds the first support portion 210.

5, the first support portion 210 is protruded from the center, and the second support portion 220 is disposed at the center of the first support portion 210, 1 support portion 210 of the first embodiment. At this time, the second support part 220 may be provided in a ring shape. The first and second support portions 210 and 220 may be coaxially disposed, and the damping member 100 may be applied to the center or between the damping members.

According to the second embodiment, unlike the first embodiment, the second support part 220 can have an opening at one side. 3 and 6, the second support part 220 is integrally formed with the first elastic member 34 and is formed in an arc shape that does not interfere with the first support part 210. In other words, And it is the same that the damping member 100 is applied in a correspondingly arranged state.

According to the third embodiment, as shown in FIG. 7, the first support part 210 is formed of a pair of protruding protruding members, and they are spaced apart from each other by a predetermined distance to form a slit-shaped groove . The second support part 220 may be provided in a straight line and may be arranged to pass through the groove. The damping member 100 may be applied to contact both the first and second supports 210 and 220.

According to the fourth embodiment, as shown in FIG. 8, the first support portion 210 is formed of a pair of protruding formed projecting members, and they are spaced apart from each other by a predetermined distance, but are staggered so as not to face each other, A gap can be formed. The second support portion 220 may be bent at least twice and may be arranged to pass through the gap. The damping member 100 may be applied to contact both the first and second supports 210 and 220.

As described above, when the damping member 100 is applied through the support unit 200, the amount by which the damping member 100 is extended compared with the conventional lens driving distance is reduced by half or more, so that the damage of the damping member 100 is minimized .

Since the damping member 100 is applied to the connection portion of the bobbin 20 and the first elastic member 34 through the support unit 200 instead of applying the gap therebetween, during the application process of the damping member 100, It is possible to prevent the damping member 100 from penetrating into other parts such as the inside of the casing 20.

The height of the protrusion-shaped first support portion 210 formed on the bobbin 20 is equal to or higher than the height of the first elastic member 34 to minimize the flow and driving distance of the damping member 100 .

In addition, the spring leg of the first elastic member 34 can be made thick in the width direction and elongated in the longitudinal direction, so that the primary frequency is maintained in the same manner as in the conventional case, Can be moved after 200 ~ 300 Hz, so that the control can be made easier.

On the other hand, the lens driving apparatus constructed as described above can also perform unidirectional control and bidirectional control.

That is, the base 10 and the bobbin 20 can be closely arranged at the initial position. For example, the base 10 may be in contact with the bottom surface of the bobbin 20 to form an initial position. Alternatively, a stopper may be formed on the bottom surface of the bobbin 20, It is also possible that the stopper is disposed in contact with the upper surface of the base 10. In this case, the first and second elastic members 34 and 35 can be formed such that the initial position of the bobbin 20 is in close contact with the base 10, The bobbin 20 is raised by the electromagnetic interaction and can be returned to the initial position by the restoring force of the first and second elastic members 34 and 35 when the power is cut off .

Alternatively, the base 10 and the bobbin 20 may be disposed at a distance from the initial position. In this case, the first and second elastic members 34 and 35 may be formed in a flat state without a preload, but may be formed in a state in which a predetermined preload is applied. In this case, when power is applied in an initial state in which the bobbin 20 is spaced a certain distance from the base 10, depending on the polarity of the applied current, for example, when the constant current is applied, If the reverse current is applied, it may be lowered based on the initial position.

In this way, the position of the bobbin 20 can be more accurately confirmed by using the second magnet 51 in this embodiment, by performing the auto focusing function by moving the bobbin 20 in the vertical direction, Can be minimized. Particularly, since the correction magnet 200 disposed at the position opposite to the second magnet 51 cancels the attractive force between the second magnet 51 and the cover member 40, It can be moved while maintaining the coaxial state.

The camera module may include a lens driving device configured as described above, a lens barrel coupled to the bobbin 20, an image sensor (not shown), and a printed circuit board. At this time, the printed circuit board is mounted on the image sensor and can form the bottom surface of the camera module.

The bobbin 20 may include a lens barrel in which at least one lens is installed. The lens barrel may be formed to be screwable inside the bobbin 20. However, the present invention is not limited thereto. Although not shown, it is also possible that the lens barrel is directly fixed to the inside of the bobbin 20 by a method other than screwing, or the one or more lenses are integrally formed with the bobbin . The lens may be composed of a single sheet, or two or more lenses may be configured to form an optical system.

The base 10 may further include an infrared cutoff filter at a position corresponding to the image sensor, and may be coupled to the housing 30. Further, the lower side of the housing 30 can be supported. The base 10 may be provided with a separate terminal member for energizing the printed circuit board, or may be formed integrally with a surface electrode or the like. Meanwhile, the base 10 may function as a sensor holder for protecting the image sensor. In this case, protrusions may be formed downward along the side surface of the base 10. However, this is not an essential configuration and, although not shown, a separate sensor holder may be disposed below the base 10 to perform its role.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Therefore, the true scope of protection of the present embodiment should be defined by the following claims.

10; Base 20; Bobbin
20a; Receiving grooves 21; Coil unit
30; A housing 32; The first magnet
33; Through hole 34; The first elastic member
35; A second elastic member 40; The cover member
50; Position sensing unit 51; The second magnet
52; Position sensor 100; Damping member
200; A support unit 210; The first support portion
220; The second support

Claims (9)

A cover member;
A bobbin on which at least one or more lenses are installed and on which coil units are arranged;
A magnet disposed at a position corresponding to the coil unit;
First and second elastic members each having one end coupled to the upper surface and the lower surface of the bobbin to support movement of the bobbin in the direction of the optical axis of the lens;
A sensing unit for sensing movement in a direction parallel to an optical axis of the bobbin;
A damping member disposed at a connection portion between the bobbin and the first elastic member; And
And a supporting unit provided on at least one of the bobbin and the first elastic member so as to maintain the position of the damping member.
The apparatus according to claim 1,
A first support formed on the bobbin; And
And a second support portion which is not in interference with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member so as to surround the periphery of the first support portion.
3. The method of claim 2,
The first support portion is disposed at the center of the second support portion,
Wherein the damping member is disposed so as to be concentric with the first and second support portions.
3. The method of claim 2,
The first support portion is disposed at the center of the second support portion,
The second support portion is provided in an arc shape having one side opened,
Wherein the damping member is disposed so as to be concentric with the first and second support portions.
The apparatus according to claim 1,
A first support formed on the bobbin; And
And a second support portion which is not in interference with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member to pass through a groove formed at the center of the first support portion.
The apparatus according to claim 1,
A first supporter formed on the bobbin and spaced apart from the bobbin by a pair of different members; And
And a second support portion which is not interfered with the first support portion and is formed at a position corresponding to the first support portion of the first elastic member so as to pass through a gap formed between the first support portions,
And the second support portion is bent at least twice.
The method according to claim 1,
The sensing unit includes:
A second magnet installed on an outer circumferential surface of the bobbin; And
And a position sensing sensor disposed on the side wall of the cover member and on an inner surface facing the second magnet.
8. The method of claim 7,
Wherein the position sensor is a hall sensor,
Wherein the circuit board is provided with a plurality of terminals exposed to the outside.
Image sensor;
A printed circuit board on which the image sensor is mounted; And
A camera module comprising the lens driving device according to any one of claims 1 to 8.

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