KR100649752B1 - Camera module for preventing the tilting of lens barrels - Google Patents

Abstract

A camera module for improving the tilting of a lens barrel is provided to minimize the alignment tolerance between components, thereby minimizing the moving friction force of the lens barrel. A camera module moves plural lens barrels(10b) and performs focus and zoom operations. Actuators(20a,20b) having output members(25a,25b) output the driving force when the power is applied and moves the lens barrels. The actuators are driving motors, and the output members are lead screws having threads. Return members(30,40) include the first connection members connected to the output members of the actuators and return the lens barrels. The second connection members are connected to the lens barrels through point contacts.

Description

CAMERA MODULE FOR PREVENTING THE TILTING OF LENS BARRELS}

1 is a perspective view of a camera module according to the prior art.

2 is an operation explanatory diagram showing a position detection unit employed in the camera module according to the prior art.

Figure 3 is an exploded perspective view showing a camera module of another structure according to the prior art.

4 is an external perspective view of a camera module according to the related art,

a) is a structural diagram in which the focus lens barrel is moved,

b) is a structural diagram in which the zoom lens barrel is moved.

5 is an exploded perspective view showing a camera module with improved tilting of the lens barrel according to the present invention.

Figure 6 is an external perspective view showing a reciprocating member provided in the camera module according to the present invention.

Figure 7 is a side view showing a reciprocating member provided in the camera module according to the present invention.

8 is an exploded view illustrating a structure in which a focus lens barrel is coupled to a reciprocating member in the camera module according to the present invention.

9 is a cross-sectional view showing in detail a state in which the focus lens barrel and the zoom lens barrel are coupled to the reciprocating member in the camera module according to the present invention.

10 is a detailed view of the lever coupling unit provided in the camera module according to the present invention.

a) is an operation explanatory diagram showing a state of fixing to the lever engaging portion,

b) the cross section.

11 is a graph showing the position of the zoom lens barrel according to the number of applied signals in the camera module according to the present invention.

12 is a graph showing the position of the focus lens barrel according to the number of applied signals in the camera module according to the present invention.

13 is a graph showing the frictional force with respect to the moving distance of the lens barrel in the camera module according to the present invention.

Explanation of symbols on the main parts of the drawings

1 .... Camera module with improved tilting of lens barrel according to the present invention

10a, 10b ... Lens Barrel 20a, 20b .... Actuator

30,40 ... reciprocating member 32a, 42a .... first connection

32b, 42b .... Second connection 72,74 .... Variable resistor

72a, 74a .... Variable resistance lever 77a, 77b ... Guide groove

80a, 80b, 80c ... Guide member 90a, 90b .... Housing

300 .... Camera module with improved tilting of conventional lens barrel

310 .... lens group for zoom 320 .... lens group for focus

315,325 ... Stepping Motor 312,322 ... Detection Plate

400 ... Conventional Camera Module 420a, 420b ... Lens Barrel

422a, 422b, 422c, 422d ... guide member

The present invention relates to a device for moving a lens barrel built in the camera module, and more particularly, to minimize the alignment tolerance between parts to minimize the frictional force of the lens barrel and smooth movement on the guide member to achieve a lens barrel The lens module has improved tilting of the lens barrel to reduce the locking phenomenon and to guide the lens barrel and the variable resistance at the same time to minimize the tilting of the lens barrel to ensure stable camera module performance. It is about.

Generally, a camera phone is installed in a mobile phone, and a camera phone in which a camera function of taking a moving picture and a still picture of an object with a mobile phone and storing it and transmitting the same to a counterpart is merged.

These camera phones are not just a function of taking an object, but additional functions such as a focus function for adjusting the focus of an object to be photographed and a zoom function for making a far object closer or closer to a far object are added. It is true.

The zoom function is roughly divided into digital zoom and optical zoom. The digital zoom is a method of enlarging an image by the image sensor itself independently of the lens, and is implemented on the same principle as enlarging an image in a graphic program. Although there is an advantage that the object can be seen or enlarged closer, there is a disadvantage that the resolution is lower than the original image because the lens does not move.

 Accordingly, the camera phone has an optical zoom, which has a merit of photographing a distant object without deterioration of image quality in such a way as to enlarge a subject by reducing or increasing a focal length while moving multiple lenses directly as in a digital camera. It is also generally employed in the camera phone area.

On the other hand, the lens transport structure for transporting the lens in the optical zoom method is usually divided in several ways.

1) Lens transfer structure using stepping motor

The optical zoom used in the digital camera is applied to the camera phone as it is, and it has the advantage of strong power and high reliability by driving the gear by engaging the stepping motor, but it has the disadvantage of being bulky and expensive. have.

2) Lens conveyance structure using liquid hydraulic pressure

It has the advantage of precisely controlling the transfer by putting liquid material between the lens to be transferred and then expanding and contracting by applying pressure to the liquid material so that the lens moves, but it consumes a lot of power when pressurizing the liquid. There is this.

3) Transfer structure of lens using piezoelectric ultrasonic motor

The lens is transported by using a motor made of piezoelectric ceramic, which has the advantage of miniaturization of the product which is smaller in volume than the conventional stepping motor method, but the gear wears out quickly and shortens the service life. It is known to have disadvantages.

4) Structure to transfer lens by solenoid method using electromagnet

A magnet and a coil are placed around the barrel of the camera module, and a magnet is also placed around the lens in the barrel, and then the lens moves directly through a current. This is known to be excellent in volume and cost, but finely conveys the lens. It is known that there is a disadvantage in that adjustment is difficult.

1 is a perspective view illustrating a camera module having improved tilting of a lens barrel using a conventional stepping motor, and FIG. 2 is a plan view showing a position detecting unit employed in a camera module having improved tilting of a lens barrel using a conventional stepping motor. As illustrated, the camera module 300 having improved tilting of the conventional lens barrel has a stepping motor 315 as a means for providing a driving force for transferring the zoom lens group 310 and the focus lens group 320, respectively. And 325, respectively, and the rotational driving force transmitted through the male screw parts 315a and 325a when the stepping motors 315 and 325 are driven is converted into a linear reciprocating motion. The focusing lens group 320 is transferred in the optical axis direction.

In addition, the position detection unit for detecting the transfer position of the zoom lens group 310 and the focus lens group 320 is the detection plate 312, 322 which is provided integrally to each of the lens group (310, 320) and And optical sensors 313 and 323 for detecting the movement of the detection plates 312 and 322.

Accordingly, the detection plates 312 and 322 are disposed in the detection plate passing grooves 313a and 323b of the optical sensors 313 and 323 which are fixed in position, and are provided in the optical sensors 313 and 323. Since the light emitting part 302a and the light receiving part 302b are respectively provided, when the detection plates 312 and 322 pass through the detection plate passage grooves 313a and 323a, the light emitting parts 302a are separated from the light emitting parts 302a. The detection light emitted toward the light-receiving unit 302b is blocked by the detection plates 312 and 322 to detect the movement of the detection plates 312 and 322 to detect the movement of the lens groups 310 and 320. Position detection is performed, and zoom and focusing can be performed based on this.

However, the stepping motors 315 and 325 have an advantage of high reliability and excellent position accuracy because they move only a given step according to a control signal when power is applied, but when the torque is not sufficient, an optical sensor ( 313 and 323 may cause an error in which the position of the lens group 310 and 320 cannot be accurately detected, and since such error information cannot be fed back, it is difficult to correct the detection error. have.

In addition, when implementing a structure for transferring the lens using the stepping motor 310, 320 as described above, the power consumption of the motor is greater than 500mW, which shortens the use time of the battery of the camera phone, the battery There was a problem in that the heat generated by the heat generated from the additional generation.

In order to solve such a conventional problem, a different camera module 400 is described in FIGS. 3 and 4, which provide a driving force by transferring a zoom lens group and a focus lens group to a plurality of motors, respectively. A way of doing this is proposed.

Such a conventional structure has a lens barrel 420a (420b) made of a focus lens barrel or a zoom lens barrel directly screwed to the lead screw (412a, 412b) of the plurality of actuators (410a, 410b), respectively, The lens barrels 420a and 420b are linearly guided along a pair of guide members 422a, 422b and 422c and 422d, respectively. Therefore, such a conventional structure requires a total of four guide members 422a, 422b, 422c, and 422d, and requires effort to mount these four guide members in parallel.

In addition, such a conventional structure includes the lead barrels 412a and 412b of the lens barrels 420a and 420b and the guide members 422a and 422b and 422c and 422d and the actuators 410a and 410b. There is a problem in securing alignment between the lens barrels 420a and 420b, and the jamming occurs frequently due to the tilting phenomenon when moving the lens barrel 420a, 420b. Difficult and difficult to apply mass production.

In particular, the housing 430a enclosing such actuators 410a and 410b, lens barrels 420a and 420b, and a plurality of guide members 422a, 422b, 422c and 422d in the camera module 400. 430b are bonded to each other, so the tilting and jamming of the lens barrels 420a and 420b are unavoidable due to the assembly tolerances, and the performance degradation of the actuators 410a and 410b and the camera are inevitable. This will cause a degradation of the module performance.

In addition, assembly tolerances between the lens barrels 420a and 420b and the guide members 422a, 422b, and 422c and 422d, and variable resistors 440a and 440b mounted to the lens barrels 420a and 420b. And the change in resistance and alignment between the lens barrels 420a and 420b and the guide members 422a, 422b and 422c and 422d, thereby degrading the performance of the zoom function and the focus function.

Therefore, there is a great need in the art for a new camera module that can maintain its performance optimally when the lens barrel is moved to maintain good image quality.

The present invention is to solve the conventional problems as described above, the object is to minimize the alignment tolerance between the components (Minimation tolerance) to minimize the friction friction of the lens barrel and to achieve a smooth movement on the guide member to catch the lens barrel The present invention provides a camera module that improves the tilting of an improved lens barrel to reduce the durability of parts.

And another object of the present invention is to maintain a good image quality of the camera module by ensuring that the lens barrel is accurately positioned at a predetermined time and minimize the tilting of the lens barrel, the variable during the movement of the lens barrel The present invention provides a camera module that improves the tilting of an improved lens barrel to simultaneously guide resistance and prevent back-lash and detachment of the variable resistance lever.

Another object of the present invention is to provide a camera module having improved tilting of a lens barrel, which can reduce the number of guide members by using the main guide and reduce the conveying friction force of the lens barrel.

And another object of the present invention, the assembly of the actuator and the variable resistor is also made smoothly, when assembling the module case, the lens barrel that can ensure the structural reliability and shorten the assembly time by minimizing the bonding (bonding) The present invention provides a camera module with improved tilting.

The present invention to achieve the above object,

In the camera module which performs the focus function and the zoom function by moving the lens barrel built in the housing,

A plurality of lens barrels including at least one lens;

A plurality of actuators each generating a driving force to move the lens barrels when the power is applied;

A plurality of reciprocating members configured to slidably connect to an output member of the actuator and a second connecting portion connected to the lens barrel in point contact with the lens barrel to transmit a driving force of the actuator to the lens barrel; And

And a plurality of guide members assembled with the lens barrels to guide the linear movement of the lens barrels, to maintain coupling degrees of freedom between components, and to minimize alignment tolerances, thereby minimizing moving frictional force of the lens barrels. It provides a camera module with improved tilting of the lens barrel.

The present invention preferably provides a camera module with improved tilting of the lens barrel, wherein the lens barrel is a zoom lens barrel or a focus lens barrel.

In another aspect, the present invention preferably provides a camera module with improved tilting of the lens barrel, characterized in that the opening is formed on the reciprocating member, the projections are screwed to the output member.

Preferably, the second connecting portion forms a concave groove in the reciprocating member, and the groove has a tilting structure of the lens barrel, wherein the protrusions protruding from the lens barrel contact the upper and lower surfaces of the groove. It provides an improved camera module.

In addition, the present invention preferably improves the tilting of the lens barrel, characterized in that the reciprocating member is composed of a semi-cylindrical projections protruding therefrom and further includes a lever coupling portion for receiving a plurality of variable resistance levers therein. Provides one camera module.

In addition, the present invention preferably provides a camera module with improved tilting of the lens barrel, characterized in that the fixing bracket for mounting the variable resistor is provided on the outside of the actuator.

In addition, the present invention preferably, the fixing bracket is a groove in which the variable resistor is fitted in a press-fit method is formed on one side, a long hole protruding from the lever of the variable resistor is formed long in the vertical direction, the fixing bracket is formed long The other side of the present invention provides a camera module with improved tilting of the lens barrel, characterized in that the guide groove is formed so that the reciprocating member is slidably formed.

The present invention preferably provides a camera module with improved tilting of the lens barrel, characterized in that the guide members include one guide member shared by the plurality of lens barrels.

The invention also preferably provides a camera module with improved tilting of the lens barrel, characterized in that the housing is assembled as a plurality of connecting screws.

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

As shown in FIG. 5, the camera module 1 having improved tilting of the lens barrel according to the present invention moves a plurality of built-in lens barrels 10a and 10b to execute a focus function and a zoom function.

The lens barrels 10a and 10b may be conventional focus lens barrels or zoom lens barrels.

In addition, the present invention includes an actuator (20a, 20b) having an output member (25a, 25b) to generate a driving force when the power is applied to output the driving force to move the lens barrel (10a) (10b). .

The actuators 20a and 20b are preferably driving motors and the output members 25a and 25b are lead screws with threaded ends.

In addition, the present invention is connected to the first connecting portion (32a) (42a) and the lens barrel (10a) (10b) connected to the output member (25a) (25b) of the actuator (20a) 20b Reciprocating members 30 and 40 having second connecting portions 32b and 42b for reciprocating lens barrels 10a and 10b in the optical axis direction by the driving force of the actuators 20a and 20b. Has

The reciprocating member 30, 40 is composed of a screw lever for transmitting the driving force of the actuator (20a, 20b) to the lens barrel (10a, 10b), the first and second connecting portion (32a) (42a), The output members 25a and 25b and the lens barrels 10a and 10b of the actuators 20a and 20b are respectively connected through the 32b and 42b.

Accordingly, the reciprocating members 30 and 40 are screwed to the output members 25a and 25b of the actuators 20a and 20b at the first connecting portions 32a and 42a.

And the reciprocating member 30, 40 is the first connection portion (32a, 42a) is preferably as shown in Figs. 6 and 7, the opening sphere 34, 44 is formed, a plurality of The protrusions 34a and 44a are screwed to the output members 25a and 25b. In this way, the plurality of protrusions 34a and 44a are screwed to the output members 25a and 25b in parallel with each other, and are coupled in a sliding manner thereon.

As such, the plurality of protrusions 34a and 44a contact and engage both sides of the threaded ends of the output members 25a and 25b. The plurality of protrusions 34a and 44a are coupled to the threads of the output members 25a and 25b to receive power from the actuators 20a and 20b.

As shown in FIG. 7, the first connecting portions 32a and 42a have an output member in the longitudinal direction in which the plurality of protrusions 34a and 44a are formed due to the structure of the openings 34 and 44. 25a) allow a sliding movement of the 25b, and accordingly the sliding displacement of the output members 25a, 25b to some extent toward the openings 34, 44 is possible during the operation of the actuators 20a, 20b. It has a coupling degree of freedom in this direction.

In addition, the reciprocating members 30 and 40 have second connecting portions 32b and 42b to be coupled to the lens barrels 10a and 10b. The second connecting portions 32b and 42b form concave grooves in the reciprocating members 30 and 40, and protrusions 54a and 54b protruding from the lens barrels 10a and 10b in the grooves. 64a and 64b are formed in a point-connected structure in contact with the upper and lower surfaces of the groove. Here, the groove has a structure in which the projections 54a, 54b, 64a, 64b of the lens barrels 10a, 10b are in contact with and accommodated on the upper and lower surfaces thereof. Such a structure is shown in FIGS. 8 and 9.

That is, the grooves are flat on the upper and lower surfaces of the second connection portions 32b and 42b so that the lens barrels 10a and 10b are engaged in point contact within the other grooves of the reciprocating members 30 and 40. The projections 54a, 54b and 64a and 64b of the levers 52 and 62, which extend from the lens barrels 10a and 10b, respectively, form a surface and contact the upper and lower surfaces, respectively. do.

As such, the second connection portions 32b and 42b preferably have the protrusions 54a, 54b and 64a and 64b in any direction within the flat surface inside the groove due to the coupling structure of the protrusions in the groove. It also has a degree of freedom to move.

Accordingly, the second connecting portions 32b and 42b maintain the point contact connection structure in the engagement with the lens barrels 10a and 10b, thereby increasing the degree of freedom of engagement in the direction parallel to the recesses of the reciprocating members 30 and 40. Have

In addition, the present invention includes lever coupling portions 25a and 25b for coupling the reciprocating members 30 and 40 to the levers 72a and 74a of the plurality of variable resistors 72 and 74. The lever engaging portions 25a and 25b are a pair of opposing semi-cylindrical protrusions 27a and 27b protruding from the reciprocating member 30 and 40, as shown in Fig. 10A. (29b), each of which receives the lever (72a) (74a) of the plurality of variable resistors (72), 74 inside.

In addition, the present invention includes a fixing bracket (71a, 71b) for mounting the variable resistor (72, 74) on the outside of the actuator (20a, 20b). As shown in FIG. 10B, the fixing brackets 71a and 71b have grooves 78a and 78b formed at one side to which the variable resistors 72 and 74 are fitted in a press-fit manner. Long holes 73a and 73b from which the levers 72a and 74a of 72 and 74 protrude from the grooves 78a and 78b and are formed to be long and vertically long. The other side of the fixing brackets 71a and 71b is formed with guide grooves 77a and 77b in which the reciprocating members 30 and 40 are positioned.

Through this structure, the levers 72a and 74a of the plurality of variable resistors 72 and 74 are interposed between the pair of opposing semi-cylindrical protrusions 27a, 27b and 29a and 29b. Each of the reciprocating members 30 and 40 is fixed and the levers of the variable resistors 72 and 74 move linearly along the guide grooves 77a and 77b during the operation of the actuators 20a and 20b. 72a) 74a is displaced.

Accordingly, the variable resistors 72 and 74 can grasp the positions of the lens barrels 10a and 10b by outputting different resistance values by moving the positions of the levers 72a and 74a.

In addition, the present invention includes a plurality of guide members 80a, 80b, 80c assembled with the lens barrels 10a, 10b to guide the linear movement of the lens barrels 10a, 10b. The plurality of guide members 80a, 80b, 80c guide the lens barrels 10a, 10b in the optical axis direction.

The guide members 80a, 80b, and 80c are made of three, two of them are used for the focus lens barrel 10a, and two of the guide members 80a are used. ) 80c are used for the zoom lens barrel 10b. Therefore, one guide member 80a is shared so that the focus lens barrel 10a and the zoom lens barrel 10b are commonly fitted.

In the present invention, as shown in FIG. 5, the housings 90a and 90b are assembled by a plurality of connecting screws 92, instead of bonding. Therefore, the reliability of the assembly structure can be secured, and the assembly time can be shortened.

The camera module 1 having improved tilting of the lens barrel according to the present invention configured as described above connects the lens barrels 10a and 10b therein to the actuators 20a and 20b and moves them by the driving force thereof. At the same time, the positional movement of the lens barrels 10a and 10b can be accurately determined through the positional movement of the levers 72a and 74a of the plurality of variable resistors 72 and 74.

The camera module 1 having improved tilting of the lens barrel according to the present invention is provided with an actuator through first connecting portions 32a and 42a having open holes 34 and 44 formed on the reciprocating members 30 and 40. The plurality of projections 34a and 44a of the first connecting portions 32a and 42a are coupled to the output members 25a and 25b because they are screwed to the output members 25a and 25b of the 20a and 20b. The lower side is slidably coupled on the output members 25a and 25b.

Therefore, the first connecting portions 32a and 42a have a sliding freedom in this direction since sliding displacement toward the openings 34 and 44 is possible during the rotation operation of the actuators 20a and 20b.

The camera module 1 having improved tilting of the lens barrel according to the present invention is connected to the lens barrels 10a and 10b through the second connecting portions 32b and 42b to the lens barrels 10a and 10b. It is combined with the degree of coupling freedom.

That is, the second connecting portions 32b and 42b form grooves in the reciprocating members 30 and 40, and levers 52 (extended from lens barrels 10a and 10b on flat surfaces of the grooves) The projections 54a, 54b and 64a and 64b of 62 are inserted into the grooves to fit the upper and lower surfaces of each of the grooves, and are connected to each other as shown in FIG.

Thus, the projections 54a, 54b, 64a, 64b have a degree of freedom in which they can move in any direction within the flat surface of the recess, so that the reciprocating member 30, 40 has a lens barrel ( It has a coupling degree of freedom to move in a direction parallel to the groove of the reciprocating member 30, 40 in engagement with 10a) (10b).

In this way, the camera module 1 having improved tilting of the lens barrel according to the present invention transfers the driving force of the actuators 20a and 20b to the lens barrels 10a and 10b and pulls the lens barrel 10a. Having a degree of freedom with engagement with 10b allows the lens barrels 10a and 10b to move freely along the guide members 80a, 80b and 80c, thus guiding members 80a, 80b and 80c. ) And minimizes friction with the lens barrels 10a and 10b along the guide members 80a, 80b and 80c.

With respect to the structure of the present invention having such a degree of freedom of coupling, as shown in Fig. 11, a series of experiments were conducted to see if the lens barrel could reach the desired position in a timely manner. This is a series of experiments on the case where the lens barrel 10b is applied to the zoom lance barrel and whether the zoom function is properly performed.

The results showed that it took 37 to 43 applied signals to reach the zoom lens position 900, which is very good.

That is, according to the present invention, the tilt phenomenon and the frictional resistance of the zoom lens barrel 10b are greatly reduced, and the zoom lens barrel 10b is smoothly moved to a desired position. The present invention also shortens the time required for the movement of the zoom lens barrel 10b to the target position, but also has the same return time as the initial movement even upon returning to the original home position.

This means that the frictional resistance generated when the zoom lens barrel 10b moves forward and the frictional resistance generated when moving backward are the same and minimized. Thus, the time required for the forward and reverse operations is kept the same so that the actuator ( Not only can the performance of 20a) and 20b be maintained uniquely, but also the zoom function of the camera module 1 according to the movement of the zoom lens barrel 10b can be guaranteed quickly and accurately.

12 illustrates a series of experiments in which the lens barrel 10a is applied to the focus lens barrel. This is a test similar to that shown in FIG. 11, which is a series of experiments to determine if the focus function is performed properly.

The results indicate that the number of applied signals takes approximately 14 to reach the focus lens position from 500 to 800, which is very good.

That is, according to the present invention, the tilt phenomenon and the frictional resistance of the focus lens barrel 10a are greatly reduced, and the focus lens barrel 10a is smoothly moved to a desired position.

The present invention also shortens the time required for the movement of the focus lens barrel 10a to this target position, but also has the same return time as the initial movement even upon returning to the original home position.

Therefore, the present invention can ensure the focus function of the camera module according to the movement of the focus lens barrel 10a quickly and accurately.

FIG. 13 is a graph showing a comparison between the frictional force of the conventional lens barrel movement and the frictional force of the lens barrel movement of the present invention.

As can be seen in the graph of FIG. 13 as described above, it can be seen that the present invention significantly reduces the frictional force generated when the lens barrels 10a and 10b move compared to the cited invention. Therefore, the present invention can achieve the movement of the lens barrels 10a and 10b easily and accurately, thereby performing the excellent zooming function and the focusing function and obtaining good image quality.

In the present invention, since the reciprocating members 30 and 40 operate by being directly connected to the levers 72a and 74a of the plurality of variable resistors 72 and 74, It is possible to maintain a stable coupling state, thereby improving the performance of the camera module (1).

As described above, according to the present invention, the tolerance of the lens barrel is minimized by minimizing the alignment tolerance between parts, and the smooth movement on the guide member is achieved, thereby reducing the locking phenomenon of the lens barrel and improving the durability of the component. Effect is obtained.

In addition, the present invention maintains the good image quality of the camera module by ensuring that the lens barrel is accurately positioned at a predetermined time and minimizes the tilting of the lens barrel, and simultaneously guides the variable resistance during movement of the lens barrel. Therefore, an improved effect is also obtained to prevent back-lash and detachment of the variable resistance lever.

In addition, the present invention minimizes the effect of alignment between components by the reciprocating member, so assembly is simple, and the lens barrel ensures accurate movement along the guide member, thereby maintaining good operating performance of the camera module and providing clear image quality. The effect that can be obtained is obtained.

In addition, the present invention can reduce the number of the guide member by the common use of the main guide to obtain an effect of reducing the transfer friction force of the lens barrel.

In addition, the squareness problem is minimized when assembling the actuator and the variable resistor, and the bonding area can be minimized when assembling the module case by fastening the housing with two connecting screws, thereby ensuring structural reliability and assembly time. Get a shortening effect.

While the invention has been shown and described with respect to specific embodiments thereof, it has been described by way of example only to illustrate the invention, and is not intended to limit the invention to this particular structure. Those skilled in the art will appreciate that various modifications and changes of the present invention can be made without departing from the spirit and scope of the invention as set forth in the claims below. Nevertheless, it will be clearly understood that all such modifications and variations are included within the scope of the present invention.

Claims (8)

 In the camera module which performs the focus function and the zoom function by moving the lens barrel built in the housing, A plurality of lens barrels including at least one lens; A plurality of actuators each generating a driving force to move the lens barrels when the power is applied; A plurality of reciprocating members configured to slidably connect to an output member of the actuator and a second connecting portion connected to the lens barrel in point contact with the lens barrel to transmit a driving force of the actuator to the lens barrel; And And a plurality of guide members assembled with the lens barrels to guide the linear movement of the lens barrels, to maintain coupling degrees of freedom between components, and to minimize alignment tolerances, thereby minimizing moving frictional force of the lens barrels. Camera module with improved tilting of the lens barrel, characterized in that. The camera module of claim 1, wherein an opening is formed on the reciprocating member, and the protrusions are screwed to the output member. The tilting of the lens barrel according to claim 1, wherein the second connecting portion forms a concave groove in the reciprocating member, and wherein the protrusions protruding from the lens barrel are in pointed contact with the upper and lower surfaces of the groove. Improved camera module. 2. The tilting of the lens barrel according to claim 1, wherein the reciprocating member further comprises a lever coupling portion formed of semi-cylindrical protrusions protruding therefrom and each receiving a plurality of variable resistance levers therein. One camera module. The camera module of claim 4, wherein a fixing bracket for mounting the variable resistor is further included on an outer side of the actuator. The method of claim 5, wherein the fixing bracket is a groove in which the variable resistor is fitted in a press-fit method is fixed to one side, a long hole protruding from the lever of the variable resistor is formed long in the vertical direction successive to the groove, Camera module having improved tilting of the lens barrel, characterized in that the other side is formed with a guide groove in which the reciprocating member is slidably positioned. The camera module of claim 1, wherein the guide members include one guide member shared by the plurality of lens barrels. The camera module of claim 1, wherein the housing is assembled as a plurality of connecting screws.

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