KR102189132B1 - Motor for actuating lens - Google Patents

Abstract

An embodiment includes a moving unit including a bobbin; A fixed part for moving the moving part and including a housing disposed outside the bobbin at a predetermined interval; An elastic unit connected to the bobbin and the housing to provide a return force to the moving part; And a damper member disposed between the housing and the elastic unit or the bobbin and the elastic unit.

Description

Lens driving motor{MOTOR FOR ACTUATING LENS}

An embodiment of the present invention relates to a lens driving motor having an improved structure.

With the widespread use of various portable terminals and the commercialization of wireless Internet services, demands of consumers related to portable terminals are diversifying. Accordingly, various types of additional devices are installed in the portable terminals.

Among them, a typical camera module is a camera module that can take a photograph or video of a subject, store the image data, and edit and transmit it as necessary.

Recently, the demand for small-sized camera modules is increasing for various multimedia fields such as notebook personal computers, camera phones, PDAs, smart phones, toys, etc., and also for image input devices such as information terminals of surveillance cameras and video tape recorders. .

The camera module includes a lens driving motor, and the lens driving motor may include an elastic unit providing a return force to the moving part, and the elastic unit may be implemented as a spring.

However, since the elastic unit does not have a damper function, the peak value of the resonance frequency is very large, and the phase may change rapidly at the resonance frequency. Such a problem may cause noise when driving at a resonant frequency, stability may be lowered during feedback or control of a lens driving motor, and an oscillation phenomenon may occur.

An embodiment is to provide a lens driving motor having an improved structure in consideration of a reliable arrangement of a damper member.

An embodiment includes a moving unit including a bobbin; A fixed part for moving the moving part and including a housing disposed outside the bobbin at a predetermined interval; An elastic unit connected to the bobbin and the housing to provide a return force to the moving part; And a damper member disposed between the housing and the elastic unit or the bobbin and the elastic unit.

In addition, at least one first fastening protrusion formed on the upper side of the bobbin and at least one second fastening protrusion formed on the upper side of the housing, wherein the elastic unit is fastened with the first fastening protrusion. It may include an upper spring including an inner portion in which a first fastening hole is formed, an outer portion in which a second fastening hole fastened with the second fastening protrusion is formed, and a connection portion connecting the inner and outer portions.

In addition, at least one receiving groove in which the damper member is filled to a predetermined height may be formed on an upper side of the housing, and a buffer portion extending toward the outer portion and accommodated in the receiving groove may be formed in the inner portion.

In addition, four receiving grooves may be formed at equal intervals.

In addition, the buffer portion may be formed in an a-shaped shape.

In addition, the free end of the buffer unit may be formed to be spaced apart from the bottom surface of the receiving groove by a predetermined distance.

In addition, the outer portion may be formed with an intermittent portion whose surface is intermittently thinned so that interference with the buffer portion extending from the inner portion does not occur.

In addition, the housing may be formed in a rectangular shape when viewed from the top, and the receiving groove may be formed in the center of each side of the housing.

In addition, the housing may have a rectangular shape when viewed from the top, and the receiving grooves may be formed at each corner of the housing.

In addition, a sensing magnet disposed on the bobbin, a position sensing sensor disposed in the housing so as to face the sensing magnet, and a substrate disposed on an outer surface of the housing on which the position sensing sensor is mounted may be further included.

In addition, the bobbin may have a first groove in which the sensing magnet is disposed, and the housing may have a second groove or a location sensor hole in which the location sensor is disposed.

In addition, the substrate may be a flexible printed circuit board.

In addition, the fixing portion may further include a base for fixing the housing to the upper side, the mounting groove is formed on one side of the substrate to the terminal portion is seated.

In addition, at least one first fastening protrusion formed on the lower side of the bobbin and at least one second fastening protrusion formed on the lower side of the housing, wherein the elastic unit is fastened with the first fastening protrusion. It may include a lower spring including an inner portion in which a first fastening hole is formed, an outer portion in which a second fastening hole fastened with the second fastening protrusion is formed, and a connecting portion connecting the inner and outer portions.

In addition, the moving part further includes a coil part disposed outside the bobbin, the fixing part a magnet part disposed in the housing to face the coil part, and a base supporting the moving part and the housing from a lower side, It may further include a cover can combined with the base to form an exterior.

In addition, the upper surface of the bobbin includes at least one protrusion formed adjacent to the connection part, and the damper member may be applied between the connection part and the protrusion.

In addition, four protrusions may be formed at equal intervals.

In addition, the protrusion may be formed in a square, triangular, circular, or trapezoidal shape.

On the other hand, the embodiment is a lens unit; A moving part including a bobbin to which the lens part is coupled; A fixing part including a housing disposed outside the bobbin at a predetermined interval; An elastic unit connected to the bobbin and the housing to provide a return force to the moving part; A damper member disposed between the housing and the elastic unit; A base supporting the housing; An image sensor disposed under the base; And a substrate on which the image sensor is mounted.

According to an embodiment of the present invention, by stably arranging the damper member by improving the structure of the housing or the bobbin, it is possible to implement a lens driving motor or camera module with improved noise and resonance values when the lens driving motor is driven.

In addition, according to an embodiment, when the position of the bobbin is sensed using a position sensor and the lens driving motor is driven, a damper unit may be used to control the oscillation phenomenon that occurs.

1 is an exploded perspective view of a lens driving motor according to an embodiment of the present invention.
2 is a perspective view with a cover can removed from the lens driving motor according to an embodiment of the present invention.
3 is a view showing a housing and an upper spring according to an embodiment of the present invention.
Figure 4 is a side cross-sectional view of Figure 3;
5 is a view showing a graph that appears when driving the conventional lens driving motor and the lens driving motor according to the embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless otherwise defined, all terms in the present specification are the same as the general meanings of terms understood by those skilled in the art, and if terms used in the present specification conflict with the general meanings of the terms, the definitions used in the present specification are applied.

However, the invention to be described below is only for describing an embodiment of the present invention, not for limiting the scope of the present invention, and reference numerals used identically throughout the specification denote the same elements.

Hereinafter, referring to the drawings, a detailed description of the lens driving motor of the embodiment is as follows.

1 is an exploded perspective view of a lens driving motor according to an embodiment of the present invention, FIG. 2 is a perspective view with a cover can removed from the lens driving motor according to an embodiment of the present invention, and FIG. 3 is a housing and an upper side according to an embodiment of the present invention. A view showing a spring, FIG. 4 is a cross-sectional side view of FIG. 3, and FIG. 5 is a view showing a graph that appears when driving a conventional lens driving motor and a lens driving motor according to an embodiment.

1 to 4, the lens driving motor according to the embodiment largely includes a moving part 100, a fixing part 200, an elastic unit 300, a damper member 400, and a position sensor part 500. Can include.

The moving unit 100 may be moved by receiving a lens or a lens unit 10 to be described later. The moving part 100 may include a bobbin 110 and a coil part 120.

The bobbin 110 may accommodate the lens unit 10 therein. Specifically, the bobbin 110 is coupled to the lens unit 10 to be described later to fix the lens unit 10, and the coupling method of the lens unit 10 and the bobbin 110 includes a screw thread of the bobbin 110. A screw thread coupling method in which the inner circumferential surface and the outer circumferential surface of the lens unit 10 are respectively formed and fastened may be used, but they may be combined by a screwless method using an adhesive. Of course, even in the threaded connection method, it is possible to achieve a more robust mounting to each other by using an adhesive after threading.

In addition, the outer circumferential surface of the bobbin 110 may be formed with a stepped portion 111 for guiding the coil portion 120 to be wound or mounted, which will be described later. The stepped portion 111 may be continuously formed on the outer surface of the bobbin 110, and may be formed at the center of the outer surface of the bobbin 110 as shown. Unlike this, the bobbin 110 A stepped portion capable of supporting the coil portion may be formed so that the pre-wound coil portion can be inserted into the upper or lower portion of the outer surface of the.

In addition, an upper spring 310 and/or a lower spring 320 provided on the upper side and/or lower side of the bobbin 110 to support the bobbin 110 from the upper side of the base 240 to be described later. At least one or more first fastening protrusions 112 to be fastened may be formed.

In addition, a first groove 113 in which a sensing magnet 510 to be described later is disposed may be formed in the bobbin 110 by being recessed into the outer surface or the stepped portion 111.

In addition, the bobbin 110 may include at least one or more protrusions 114 formed on the upper surface adjacent to the connection part 310c of the upper spring 310 to be described later, and the protrusion 114 is When viewed, it may be formed in a square, triangular, circular, or trapezoidal shape, but is not limited thereto.

In addition, the first fastening protrusion 112 or the protrusion 114 may be formed at equal intervals or symmetrically on the upper side of the bobbin 110, respectively. In the embodiment, the first fastening protrusions 112 may be formed in four pairs, two of which are a pair, and four of the protrusions 114 may be formed at equal intervals or symmetry, respectively.

The coil unit 120 may be disposed outside the bobbin 110. Specifically, it may be guided to the stepped part 111 of the bobbin 110 and wound on the outer surface of the bobbin 110, and a pre-wound coil part 120 may be mounted on the stepped part 111 have.

Alternatively, four individual coils may be disposed at 90° intervals on the outer surface of the bobbin 110. The coil unit 120 forms an electromagnetic field by receiving power applied from a printed circuit board (not shown) to be described later, and may move the bobbin 110 through interaction with the magnet unit 230 to be described later.

The fixing part 200 may include a housing 220, a magnet part 230, and a base 240, may further include a cover can 210, and the cover can may also serve as a housing. The magnet part of the fixing part 200 and the coil part of the moving part 100 may interact to move the moving part.

The housing 220 may be disposed outside the bobbin 110 at predetermined intervals. In addition, the housing 220 may not be separately provided, and may be formed integrally with the cover can 210 to be described later, or only a separate cover can may form the exterior of the lens driving motor.

In an embodiment, the housing 220 is supported on the base 240 and may accommodate the bobbin 110 inside, and may be formed in a hexahedral shape corresponding to the shape of the cover can 210, , The lower side may be opened to support the moving part 100.

In addition, the housing 220 may include a magnet part fastening hole 221 or a magnet part fastening groove formed in a shape corresponding to the magnet part 230 to be described later. The magnet part fastening holes 221 may be formed in the housing 220 with a number corresponding to the magnets of the magnet part 230 to be described later. The magnet part fastening hole 221 or the magnet part fastening groove according to the embodiment may be formed on two sides opposite to the housing 220 in consideration of the sensing magnet 510 to be described later as shown, but four sides It can also be formed in all.

In addition, the housing 220 may be formed of an insulating material, and may be formed as an injection product in consideration of productivity.

In addition, at least two stoppers 222 protruding from the upper surface of the housing 220 and capable of absorbing the shock in case of an external shock may be formed at a predetermined interval. The stopper 222 may be integrally formed with the housing 220, may be formed on the bobbin 110, or may not be formed.

In addition, at least one second fastening protrusion 223 may be formed on the upper side and/or the lower side of the housing 220, and the outer portion 310a of the upper spring 310 or the lower spring 320 to be described later. ) Is coupled to the second fastening hole 310aa. Four of these second fastening protrusions 223 may be formed at equal intervals or symmetrical or asymmetrical.

In addition, the housing 220 protrudes so that the fixing protrusions 224 can be disposed at both ends of the intermittent portion 310ab for fixing the intermittent portion 310ab formed on the outer portion 310a of the upper spring 310 to be described later. Can be formed.

Further, referring to FIG. 4, at least one receiving groove 225 in which a damper member 400 to be described later is filled at a predetermined height may be formed on the upper side of the housing 220, and such a receiving groove 225 Silver can be formed at equal intervals or symmetrical or asymmetrical. Here, the receiving groove 225 may be formed at the center of each side of the housing 220 as shown, or may be formed at each corner of the housing 220.

In addition, a position sensor hole 227 or a second groove (not shown) in which a position sensor 520 to be described later is disposed may be formed on one side of the housing 220. When considering the mounting of the substrate 530 and the position sensor 520, it is preferable that the position sensor 520 is disposed as a position sensor hole 227 having a side hole 227 as shown. The position sensor may be a Hall sensor.

In addition, a coupling groove 226 in which the coupling protrusion 241 of the base 240 to be described later can be seated may be formed at the lower end of the outer edge of the housing 220, and the coupling protrusion 241 and the coupling groove ( The 226 may facilitate assembly of the housing 220 and the base 240 and at the same time achieve a solid fixing force.

In addition, the housing 220 may be disposed to be spaced apart from the cover can 210 by a predetermined distance, or may be coupled to the cover can 210. The bobbin 110 may be moved in the optical axis direction due to the interaction between the coil unit 120 and the magnet unit 230.

The magnet part 230 may be mounted on the housing 220 or the cover can 210 with an adhesive or the like so that the magnet part 230 may be disposed in the housing 220 to face the coil part 120, and the housing 220 ) It is mounted as two or four magnets to face each other in the magnet part fastening hole 221 formed in), so that efficient use of the internal volume can be achieved.

Alternatively, the magnet unit 230 may be mounted on four or two inner surfaces of the housing 220 to face the coil unit 120.

The shape of each of the magnets forming the magnet part 230 may be formed in a rectangular parallelepiped shape as shown, but is not limited thereto, and may be a polygonal column.

The base 240 fixes the housing 220 to an upper surface, and specifically, may be coupled to a cover can 210 to be described later to wrap the moving part 100 and the housing 220.

A through hole 242 corresponding to the lens unit 10 to be described later is formed in the center of the base 240. In addition, the base 240 may have a circular shape in the center so that the bobbin 110 may be spaced apart from each other, and a recess portion 243 recessed downward may be formed.

In addition, the base 240 may protrude from the upper edge to form one or more coupling protrusions 241 for interviewing or engaging with the coupling groove 226 of the housing 220, such coupling protrusion 241 The fastening of the housing 220 is easily guided, and at the same time, it is possible to securely fix the housing 220 after fastening.

In addition, the base 240 may have a seating groove 244 in which the terminal portion 531 of the substrate 530 to be described later is seated on one side thereof, and the seating groove 244 may be formed at least of the base 240. It can be formed concave on one side. In addition, the mounting groove 244 may be formed at a right angle or an acute angle with respect to the inner surface of the cover can 210 to be described later so as to correspond to the arrangement angle of the terminal portion 531.

In addition, the base 240 may perform a sensor holder function for protecting an image sensor (not shown) to be described later, and a filter (not shown) may be disposed. In this case, the filter may be mounted near the through hole formed in the center of the base 240, and an infrared filter or a blue filter may be provided.

Here, the filter may be formed of, for example, a film material or a glass material, and an infrared blocking coating material may be disposed on a flat optical filter such as a cover glass or cover glass for protecting an imaging surface.

On the other hand, when the filter is installed on the outside of the lens, it is of course possible to block infrared rays by coating the lens surface without separately configuring the filter.

On the other hand, the lens driving motor according to the embodiment of the present invention may further include an elastic unit 300.

The elastic unit 300 may include an upper spring 310 and a lower spring 320 connected to the bobbin 110 and the housing 220 to provide a return force to the moving part 100. The upper spring 310 and the lower spring 320 may be formed of separate springs disposed on each side of the housing 220, but for the efficiency of production, a single plate is bent and cut. It is preferably made of.

The upper spring 310 is disposed at upper ends of the housing 220 and the bobbin 110 to support the bobbin 110 and is provided to provide a return force when the bobbin 110 moves upward.

The upper spring 310 has an outer portion 310a fastened to the housing 220, an inner portion 310b fastened to the bobbin 110, and a connection portion connecting the outer portion 310a and the inner portion 310b ( 310c). Here, the connection part 310c may be formed as at least one bending part.

For fastening of the upper spring 310, at least one second fastening protrusion 223 is formed on the upper side of the housing 220, and the second fastening protrusion 223 is formed on the outer part 310a. A second fastening hole 310aa may be formed correspondingly to be fastened.

Meanwhile, for fastening the upper spring 310, at least one or more first fastening protrusions 112 are formed on the upper side of the bobbin 110, and the first fastening protrusion 112 is formed on the inner part 310b. A first fastening hole 310ba formed to correspond to) may be formed.

Fixing of the fastening protrusion and the fastening hole may be implemented by heat fusion, bonding, or soldering.

In addition, a buffer part 310bb extending in the direction of the outer part 310a and accommodated in the receiving groove 225 may be formed at the inner part 310b of each of the upper spring 310, and the buffer part 310bb May be formed in an a-shaped shape, but is not limited to this shape, and a shape capable of being extended and disposed in the receiving groove 225 from the inner portion 310b is sufficient. The free end of the buffer part 310bb may be disposed to be spaced apart from the bottom surface of the receiving groove 225 by a predetermined distance, and in this case, a part of the free end may be accommodated in the damper member 400 to be described later to be elastically disposed. have.

In addition, the outer portion 310a may be provided with an intermittent portion 310ab whose surface is intermittently thinned so that interference with the buffer portion 310bb extending from the inner portion 310b does not occur. (310ab) may be supported by the fixing protrusion 224 of the above-described housing 220.

The embodiment may include a position sensor unit 500, and the position sensor unit 500 may largely include a sensing magnet 510, a position sensor 520, and a substrate 530. The position sensor may be a Hall sensor.

The substrate 530 may be implemented as a flexible printed circuit board 530 disposed between the outer surface of the housing 220 and the cover can 210, and a terminal portion formed at one side to be connected to an external power source. (531) may be included.

In this case, the terminal portion 531 may be formed in a lower side (base direction) to be soldered with a separate printed circuit board to be described later.

In addition, the substrate 530 may be electrically connected to both ends of the coil unit 120 in order to apply power to the coil unit 120.

The substrate 530 may be mounted with the position sensor 520. Specifically, the position sensor 520 is disposed in the housing 220 so as to face the sensing magnet 510 to sense the strength and phase of the magnetic field of the sensing magnet 510 disposed on the bobbin 110 In order to quickly and precisely control the bobbin, autofocusing driving may be performed.

In consideration of miniaturization of the lens driving motor, the position sensor 520 may be disposed by forming a position sensor hole 227 in the housing 220, but is not limited thereto, and may be disposed without a hole. . In addition, the sensing magnet 510 may be disposed by forming a first groove 113 in the bobbin 110, and a portion of the substrate 530 in which the terminal portion 531 is formed is seated on the base 240 It may be disposed by forming a groove 244.

In addition, the position detection sensor 520 may be provided in a straight line with the sensing magnet 510, and since it must sense the displacement of the z-axis in the optical axis direction, the moving part 100 on the outer surface of the bobbin 110 A sensing magnet 510 may be disposed separately from the magnet part 230 for driving, and may be used as a magnet part.

However, unlike shown, the position sensing sensor 520 may be disposed on the bobbin 110 inside the coil unit 120, and in this case, the position sensing sensor 520 is covered by the coil unit 120 It may not be visible from the outside. In addition, the position detection sensor 520 may be disposed outside the coil unit 120.

In addition, the sensing magnet or the position sensor may be disposed above or below the coil part so as not to overlap with the coil part. In this case, the interference effect of the coil may be further reduced.

Such a position sensor 520 is provided adjacent to the coil unit 120 than the sensing magnet 510, but the strength of the magnetic field formed in the sensing magnet 510 is several hundred times greater than the strength of the electromagnetic field formed in the coil. Considering that, in sensing the movement of the sensing magnet 510, the electromagnetic field of the coil unit 120 is not considered.

The cover can 210 may be fastened to the base 240 to accommodate the moving part 100, the fixing part 200, and the elastic unit 300, and may form the exterior of the lens driving motor. As shown, the cover can 210 may be formed in a rectangular parallelepiped shape with an opening 211 formed on an upper side and an open lower side, but the shape of the cover can 210 is limited thereto. no.

The cover can 210 may have an inner side in close contact with the side side of the base 240 to be described later, so that the lower side may be closed by the base 240, while protecting internal components from external impacts and at the same time, external contamination. It may have a substance penetration prevention function.

In addition, the cover can 210 may also perform a function of protecting components of the camera module from external radio wave interference generated by a mobile phone or the like. Accordingly, the cover can 210 may be formed of a metal material such as iron or aluminum, and may be plated with a metal such as nickel to prevent corrosion.

In addition, although not shown, the cover can 210 may be formed with an exposed portion in which a portion corresponding to the mounting groove 244 of the base 240 is exposed, and such an exposed portion is a terminal portion 531 to be described later. ) And the printed circuit board may be easily soldered, and a short circuit of the cover can 210 due to solder may be prevented.

In addition, an inner yoke 212 bent downward may be further included in the inner circumference of the opening 211 formed on the upper side of the cover can 210. This inner yoke may be formed to be disposed between the bobbin 110 and the coil unit 120.

Meanwhile, the embodiment may include a damper member 400 disposed between “the housing 220 and the elastic unit 300” and/or “the bobbin 110 and the elastic unit 300”. The damper member 400 may be implemented as an epoxy material in the form of a sol or gel, and is applied between the housing 220 and the elastic unit 300 and/or the bobbin 110 and the elastic unit 300 to cause an impact. It can play a role in absorbing.

Specifically, the bobbin 110 is moved in the direction of the optical axis, and this movement is for focusing the subject. The inner part 310b of the upper spring 310 is elastically deformed with the movement of the bobbin 110, and provides a return force after the bobbin 110 in which the lens part 10 is accommodated moves. Here, in the embodiment, a buffer part 310bb extending from the inner part 310b is formed, and this buffer part 310bb is a free end on the damper member 400 applied to the housing 220, which is the fixing part 200. Since they are in contact with this predetermined interval, the translational motion of the spring can be alleviated. In the embodiment, a receiving groove 225 is formed in the housing 220 in order to efficiently apply the damper member 400, and a damper member 400 filled in the receiving groove 225 at predetermined intervals, and the receiving groove It includes a buffer portion 310bb that is spaced apart from the bottom surface of 225 and is in contact with the damper member 400.

On the other hand, another embodiment (between the bobbin 110 and the elastic unit 300) is separately or combined with the embodiment (between the housing 220 and the elastic unit 300) and the inner portion 310b ) To alleviate the translational movement of the connection part 310c that is connected to the bobbin 110 and elastically deforms when the bobbin 110 moves, the protrusion part ( 114), and a damper member 400 may be applied between the connection part 310c and the protrusion part 114.

By the structural features for arranging the damper member 400, an experimental example as shown in FIG. 5 may be derived. FIG. 5(a) is a graph showing the occurrence of a resonance point in a conventional lens driving motor, and FIG. 5(b) is a graph showing a frequency value when driving the lens driving motor according to the embodiment.

In the embodiment, the peaks (peak, p1, p2) of the conventional resonance frequency as shown in the left graph (a) of FIG. 5, that is, the resonance points (p1, p2) are shown in the right graph (b) of FIG. I can remove it gently like that.

By adjusting the amount or the applied area of the damper member 400, the embodiment can move the resonance frequency in a high direction. For example, the range of the controlled resonance frequency is 50 so as not to overlap the range of the resonance frequency of the vibration motor. To 180Hz.

In short, the embodiment proposes a structure capable of efficiently disposing the damper member 400 on the spring and the moving part 100 and/or the fixing part 200, thereby eliminating the possibility of separation of the damper member 400 Durability and reliability of the damper member 400 may be reinforced, and noise that may occur when the lens driving motor is driven by changing the shape or resonance point of the frequency, stability of control, and oscillation phenomenon may be eliminated.

Although the embodiment of the present invention has been described in the AF (Auto Focusing) type lens driving motor, it can be applied to the OIS (Optical Image Stabilization) type lens driving motor.

On the other hand, the lens driving motor according to the embodiment may be mounted on the camera module, such a camera module is a mobile phone or notebook type personal computer, camera phone, PDA, smart, toy (toy), etc. It may be provided in an image input device such as an information terminal of a camera or video tape recorder.

In short, when the lens driving motor according to the embodiment is provided in the camera module, the camera module is not shown, but may further include a lens unit 10, a printed circuit board, and an image sensor.

The lens unit 10 may be a lens barrel, but is not limited thereto, and any holder structure capable of supporting the lens may be included. In the embodiment, the case where the lens unit 10 is a lens barrel is described as an example.

The lens unit 10 is installed on the upper side of the printed circuit board to be described later, and is disposed at a position corresponding to the image sensor. The lens unit 10 is provided with one or more lenses.

In addition, the camera module according to the embodiment of the present invention may further include a printed circuit board. The printed circuit board has an image sensor (not shown) mounted in the center of the upper side, and various devices (not shown) for driving the camera module may be mounted. In addition, in order to apply power for driving the lens driving motor according to the embodiment, the printed circuit board may directly connect the terminal part 531 or the lower spring 320 or the upper spring 310 or directly to the coil part 120. It is electrically connected.

The image sensor (not shown) may be mounted in the center of the upper side of the printed circuit board so that it may be positioned along the optical axis direction and at least one lens accommodated in the lens unit 10. Such an image sensor converts an optical signal of an object incident through the lens into an electrical signal.

From the above description, those skilled in the art will recognize that various changes and modifications can be made without departing from the technical spirit of the present invention, and the technical scope of the present invention is not limited to the contents described in the embodiments, but claims It should be determined according to the scope and the scope equivalent thereto.

100: moving part 110: bobbin
111: stepped part 112: first fastening protrusion
113: first groove 114: protrusion
120: coil part 200: fixed part
210: cover can 211: opening
212: inner yoke 220: housing
221: magnet part fastening hole 222: stopper
223: second fastening protrusion 224: fixing protrusion
225: receiving groove 226: coupling groove
230: magnet part 240: base
241: coupling protrusion 242: through hole
243: recess part 244: seating groove
300: elastic unit 310: upper spring
310a: outer part 310aa: second fastening hole
310ab: intermittent part 310b: inner part
310ba: first fastening hole 310bb: buffer part
310c: connection 320: lower spring
400: elastic member 500: position sensor unit
510: sensing magnet 520: position sensor
530: substrate

Claims (17)

housing;
A magnet disposed in the housing;
A bobbin disposed in the housing and moving in the optical axis direction;
A coil disposed on the bobbin;
An upper spring disposed on an upper surface of the bobbin and an upper surface of the housing and including an inner portion coupled to the bobbin, an outer portion coupled to the housing, and a connection portion connecting the inner portion and the outer portion; And
And a damper member disposed between the housing and the upper spring,
The upper spring includes a protrusion extending in a horizontal direction,
The housing includes a receiving groove formed at a position corresponding to the protrusion,
The damper member is adhered to the protrusion and the receiving groove, and the lens driving motor is spaced apart from the outer portion of the upper spring. The method of claim 1,
At least a portion of the damper member is a lens driving motor disposed in the receiving groove. The method of claim 1,
A first fastening protrusion coupled to the inner portion is formed on the upper surface of the bobbin,
A lens driving motor having a second fastening protrusion coupled to the outer portion formed on an upper surface of the housing. The method of claim 1,
The damper member is a lens driving motor disposed between the bottom of the receiving groove and the protrusion. The method of claim 1,
The protrusion is a lens driving motor extending from the inner portion. The method of claim 1,
The protrusion includes a plurality of protrusions disposed to be spaced apart from each other,
The receiving groove includes a plurality of receiving grooves corresponding to the plurality of protrusions,
The damper member includes a plurality of damper members,
Each of the plurality of damper members is a lens driving motor disposed between the corresponding protrusion and the receiving groove. The method of claim 1,
The damper member is a lens driving motor made of a sol or gel-type epoxy material. The method of claim 1,
The housing is formed in a quadrangular shape when viewed from an upper side, and the receiving groove is formed on a side of the housing. The method of claim 1,
The housing is formed in a square shape when viewed from the top, and the receiving groove is a lens driving motor formed at each corner of the housing. The method of claim 1,
A lower spring coupled to a lower portion of the bobbin and a lower portion of the housing; And
A lens driving motor comprising a base disposed under the lower spring. The method of claim 1,
A sensing magnet disposed on the bobbin;
A circuit board disposed on the housing;
A lens driving motor including a position sensor disposed on the circuit board and disposed at a position corresponding to the sensing magnet. The method of claim 11,
The bobbin has a first groove in which the sensing magnet is disposed,
The housing is a lens driving motor having a second groove in which the position sensor is disposed. The method of claim 11,
The circuit board is electrically connected to the coil,
The circuit board is a lens driving motor including a terminal portion electrically connected to the upper spring. Bobbin;
A housing disposed to be spaced apart from the bobbin;
An elastic unit connecting the bobbin and the housing; And
It includes a damper member disposed between the housing and the elastic unit,
The elastic unit includes an inner portion coupled to the bobbin, an outer portion coupled to the housing, and a connection portion connecting the inner portion and the outer portion,
The housing includes a receiving groove,
The elastic unit includes a protrusion extending in a horizontal direction and including at least a portion corresponding to the receiving groove,
The damper member is coupled to the protrusion and the receiving groove, the lens driving motor spaced apart from the outer portion of the elastic unit. housing;
A magnet disposed in the housing;
A bobbin disposed in the housing and moving in the optical axis direction;
A coil disposed on the bobbin;
An upper spring disposed on an upper surface of the bobbin and an upper surface of the housing;
A lower spring disposed on a lower surface of the bobbin and a lower surface of the housing; And
And a damper member disposed between the upper spring and the housing,
The upper spring includes an inner portion coupled to the bobbin, an outer portion coupled to the housing, and a connection portion connecting the inner portion and the outer portion,
The upper spring includes a protrusion extending in a horizontal direction,
The housing includes a receiving groove disposed under the protrusion,
The damper member is disposed between the protrusion and the housing,
The damper member is coupled to the protrusion and the receiving groove, the lens driving motor is spaced apart from the outer portion of the upper spring. Lens unit;
A lens driving motor according to any one of claims 1 to 15 to which the lens unit is coupled; And
A camera module containing an image sensor. A mobile phone comprising the camera module according to claim 16.

Images