KR200248340Y1 - Zoom lens barrel driving system for a camera - Google Patents

Abstract

One motor and a barrel idle gear that receives the driving force of the motor through a plurality of power transmission gears are provided in the lens base. The lens base is provided with a plurality of barrels, and includes a magnification adjusting means driven by one motor and a focus adjusting means.

The magnification adjusting means is housed in the lens base, a spiral focus adjustment groove is formed on the inner circumferential surface, and a focus adjustment protrusion is formed at an interval corresponding to the lens focal length set so that the thickness of the focus adjustment groove is repeatedly changed. It includes a helicoid ring that rotates and moves in the direction of the optical axis receives the rotational power through the barrel idle gear of the lens base,

Focusing adjustment means is coupled to one side of the zoom ring, one end is coupled to the first focus cam lever, one side of the first focus cam lever which is in close contact with the focus adjustment groove or the focus adjustment protrusion of the helicoid ring The second focus cam lever is coupled to the other side of the front lens unit and the other side so as to repeatedly move a predetermined distance in the optical axis direction in association with the first focus cam lever.

The camera having the zoom lens barrel driving system can increase the design freedom by a simple structure in which focusing is performed while zooming is realized according to the thickness of the focus adjustment groove formed in the helicoid ring. It has the advantage to be solved. In addition, by using the large force of the rotating barrel to configure the focusing and zooming operation can be provided with the required performance at a low cost, it is possible to subdivide the set lens focal length according to the number of the focus adjustment projection.

Description

Camera having zoom lens barrel drive system {ZOOM LENS BARREL DRIVING SYSTEM FOR A CAMERA}

The present invention relates to a zoom camera, and more particularly, to a zoom lens barrel driving system of a lens shutter type camera capable of zooming and focusing with a single driving source.

In general, a compact zoom camera includes a zoom lens barrel system having a zoom function of varying a magnification, which is a focal length of a photographing lens, and a focus function of adjusting a focal point according to a distance of a subject.

Means having such a zoom and focus function are disclosed in US Pat. Nos. 4,936,664, 5,602,608, 5,687,029, and the like.

U.S. Patent No. 4,936,664 shows a structure in which a zoom motor for varying magnification and a focus motor for focusing are respectively installed to adjust zooming and focus. Driving one motor to vary the focal length causes a continuous change in the zoom ratio from wide to tele or tele to wide as the barrel rotates. The focusing is controlled by the other motor, which is achieved by rotating the focus lever in the shutter block in the focus area at a predetermined angle. That is, the angle of rotation of the focus lever in the shutter block is rotated at regular intervals corresponding to the focal length, thereby taking a picture. In this way, the driving method by the two driving sources can easily control zooming and focusing independently.

U.S. Patent No. 5,602,608 discloses a method of driving zooming, focusing, film winding and rewinding with a power switching means as one drive source. This method has an advantage of reducing the number of driving sources because zooming and focusing with one driving source.

U.S. Patent No. 5,687,029 also discloses a zoom lens barrel system that implements zooming and focusing with one drive source. In particular, this zoom lens barrel system implements a zooming area and a focusing area by forming grooves for guiding a pin related to focusing on the barrel inner circumference.

The technique shown in the above-mentioned US Patent No. 4,936,664 has a problem that the control efficiency is good but the cost is increased by using a DC motor having a high driving force as a driving source for zooming and a stepping motor which is easy to control the position as a focusing driving source. In addition, the technique shown in US Patent No. 5,602,608 has a problem that it is difficult to implement a compact camera due to the complicated structure of the power switching means. In addition, the technique shown in U.S. Patent No. 5,687,029 has a section in which the groove formed in the barrel affects the operation of the barrel, and thus there is a section which cannot be used as the photographing optical system, so that a continuous zooming operation or a multi-stage magnification region can be realized. There is a difficult problem.

Therefore, the present invention was created to solve the above-mentioned problems of the prior art, and an object of the present invention is to focus on continuously changing the focal length while reducing the cost by using one driving source to implement zooming and focusing. An object of the present invention is to provide a camera having a zoom lens barrel driving system in which photographing optical systems are implemented in all length regions and focusing is performed correspondingly.

In addition, the continuous optical system is implemented over the entire focal length, and the subject focusing adjustment lens group continuously and repeatedly moves between the near and far focal positions in the optical axis direction in response to changes in the magnification of the photographing lens. The present invention provides a camera having a zoom lens barrel driving system for improving performance by implementing a simple mechanism.

1 is a front view showing the main part of the camera to illustrate an embodiment of the present invention,

2 is a plan view of FIG.

Figure 3 is an exploded perspective view showing an exploded barrel assembly according to an embodiment of the present invention,

4 is a cross-sectional view of the barrel assembly shown in FIG.

5 is a cross-sectional view showing another embodiment of FIG. 4;

Figure 6 is a perspective view showing in detail the main part according to the present invention,

7 is an exploded perspective view illustrating an exploded first and second focus cam levers according to an embodiment of the present invention;

8 is a perspective view illustrating a state in which the first and second focus cam levers are coupled according to an embodiment of the present invention;

9 is a perspective view showing a helicoid ring according to an embodiment of the present invention,

10 is a plan view showing an inner circumferential surface of the helicoid ring according to the present invention;

FIG. 11 is a cross-sectional view of the A-A section of FIG. 10;

12 is a view for explaining the relationship between the first focus cam lever and the helicoid ring in the zoom magnification preparation step to explain the operation of the present invention,

13A is a view showing a state immediately before the rotation of the first focus cam lever due to the rotation of the helicoid ring;

13B is a view showing a state in which the first focus cam lever is rotated by the rotation of the helicoid ring;

13C is a view illustrating a state in which the first focus cam lever is rotated by the rotation of the helicoid ring;

14A is a front view for explaining focus adjustment of a front lens unit according to a second focus cam lever;

14B is an operating state diagram showing a state in which the front lens unit rotates in accordance with the second focus cam lever;

14C is a view for explaining positions of the second focus cam lever and the front lens unit when the first focus cam lever is rotated to the maximum;

15 is a graph showing a movement diagram of the front and rear lens unit according to the embodiment of the present invention.

According to the present invention, a magnification adjusting means in which a plurality of barrels and a lens group are moved in an optical axis direction by the driving source, and the magnification change of the photographing optical system is continuously performed, and the lens group is linked to the magnification change of the photographing optical system. It includes a focus adjusting means for moving the focus to the near focus position and the far focus position in the direction to adjust the focus.

In the present invention, a motor and a barrel idle gear that receives the driving force of the motor through a plurality of power transmission gears are installed in the lens base. The lens base is provided with a plurality of barrels, and includes a magnification adjusting means driven by one motor, and a focus refraction means.

The magnification adjusting means is fixed to the camera body and has a lens base having a barrel idle gear for receiving rotational power of the motor through the plurality of power transmission gears, and is housed in the lens base and has a spiral focus adjustment groove on its inner circumferential surface. Is formed and a focus adjustment protrusion is formed at an interval corresponding to the lens focal length set so that the thickness of the focus adjustment groove is repeatedly changed, and receives rotational power through the barrel idle gear of the lens base in the optical axis direction. A helicoid ring that rotates and moves in a straight line, a guide barrel that is accommodated in the helicoid ring and moves straight in the optical axis direction, and is stored in the guide barrel and is received in a straight guide of the guide barrel so that the Rotates with optical axis room A rear lens unit coupled to the guide barrel and the helical ring and moving in the optical axis direction in association with the helical ring, a shutter block fixed to the zoom ring and controlling the amount of light, It is coupled to the shutter block and has a front lens unit to rotate and move in the direction of the optical axis,

Focusing adjustment means is coupled to one side of the zoom ring, one end is coupled to the first focus cam lever, one side of the first focus cam lever which is in close contact with the focus adjustment groove or the focus adjustment protrusion of the helicoid ring The second focus cam lever is coupled to the other side of the front lens unit and the other side so as to repeatedly move a predetermined distance in the optical axis direction in association with the first focus cam lever.

Therefore, when zooming for photographing, the magnification change of the photographing optical system is continuously made by one driving source, and the lens group is repeatedly moved in the direction of the optical axis according to the magnification change of the optical system to achieve continuous focusing.

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

1 is a front view showing the main part of the camera for explaining an embodiment of the present invention, Figure 2 is a plan view of Figure 1, the camera body 1 and the zoom motor 3 and of the zoom motor 3 The power transmission gear group 5 for decelerating a rotation drive force and transmitting it to a barrel is shown.

On the upper surface of the camera body 1, tele and wide switches 7 and 9, a release switch 11 and the like for zooming are arranged. The tele and wide switches 7 and 9 are connected to the control printed circuit board 13 housed in the camera body 1 so as to drive the zoom motor 3.

The zoom motor 3 is housed in the camera body 1 and is connected to the control printed circuit board 13 so that zooming and focusing are performed simultaneously by forward and reverse rotation according to the operation of the tele and wide switches 7 and 9. It is.

The power transmission gear group 5 includes the first reduction gear 15 connected to the driving force of the zoom motor 3, the second reduction gear 17 engaged with the first reduction gear 15, and the first reduction gear 15. It consists of the 3rd reduction gear 19 meshed with the 2nd reduction gear 17, and the 4th reduction gear 21 meshed with the 3rd reduction gear 19. As shown in FIG. The power transmission gear group 5 serves to reduce the driving force of the zoom motor 3, and in the present embodiment, the number has been described as being four, but the number is not limited, and the number is large depending on the design efficiency. It is possible to install.

The barrel idle gear 23 is engaged with the fourth reduction gear 21 and the zoom motor 3 is mounted on the zoom lens barrel assembly 25 housed in the camera body 1 to move the barrel in the optical axis direction. It is installed in a structure that can transmit the driving force.

3 is an exploded perspective view illustrating an exploded view of a zoom lens barrel assembly of an embodiment according to the present invention, and FIG. 4 is a cross-sectional view of the zoom lens barrel assembly of FIG.

The lens base 27 is fixedly coupled to the camera body 1, and a plurality of helicoid grooves 27a are formed on the inner circumferential surface of the spiral and a plurality of linear guide grooves 27b in the optical axis direction. One side of the lens base 27 is coupled to the barrel idle gear 23 engaged with the fourth reduction gear 21.

The helicoid ring 29 is coupled to the helicoid groove 27a formed in the inner circumferential surface of the lens base 27 to form a heloidoid protrusion 29a at one end of the outer circumferential surface so as to rotate and move in the optical axis direction. The gear 29b is formed between the helicoid protrusions 29a so as to be engaged with the barrel idle gear 23. The gear 29b is engaged with the barrel idle gear 23 to receive the driving force of the zoom motor 3 to rotate and move the helicoid ring 29 in the optical axis direction.

On the inner circumferential surface of the helicoid ring 29, the zoom ring movement guide groove 29c in the helical direction and the rear lens unit movement guide groove 29d are also formed in the spiral direction.

In addition, the inner circumferential surface of the helical ring 29 has a focus adjustment groove 29e (shown in FIG. 10) and a plurality of focus adjustment protrusions 29f, 10 at equal intervals in the focus adjustment groove 29e. Is formed). The focus adjustment protrusions 29f, 29g, 29h, 29i are formed at a constant height in the focus adjustment groove 29e.

The guide barrel 31 is coupled to the inside of the helicoid ring 29 to move in the optical axis direction while making a relative movement with the helicoid ring 29.

The guide barrel 31 is coupled to a plurality of linear guide grooves 27b of the lens base 27 on one outer circumference (omitted for the reference of other linear guide grooves), and guide protrusions 31a and 31b for moving straight in the optical axis direction. Is formed. And the guide barrel 31 has the rear lens unit movement guide groove | channel 31c and the zoom ring movement guide groove | channel 31d which consist of the long groove | channel of the optical axis direction on the outer peripheral surface.

The rear lens unit frame 33 has a plurality of guide protrusions 33a and 33b formed on its outer circumferential surface, and the guide protrusions 33a and 33b formed on the rear lens unit frame 33 have a rear group of the guide barrel 31. It is coupled to the lens unit movement guide groove 31c, and coupled to the rear lens group movement guide groove 29d of the heloidoid ring 29 to move straight in the optical axis direction.

The zoom ring 35 is accommodated inside the guide barrel 31 and is configured to move straight in the optical axis direction.

The zoom ring 35 has a plurality of guide protrusions 35a formed on one side of the outer circumferential surface thereof, and the guide protrusions 35a are fitted to the zoom ring moving guide groove 31d of the guide barrel 31 and are heloidized. It is fitted to the zoom ring movement guide groove 29c of the ring 29. Therefore, the zoom ring 35 has a structure capable of moving in the optical axis direction in accordance with the movement of the guide protrusion 35a.

In addition, the entire lens unit frame 37 is coupled to the inside of the object side of the zoom ring 35. The entire lens unit frame 37 coupled to the zoom ring 35 has a helical protrusion formed in the helical direction on the outer circumferential surface thereof. It has a structure in which the focusing can be adjusted by forming and rotating and moving in the optical axis direction.

In the present embodiment, a structure in which the entire lens unit frame 37 is directly coupled to the zoom ring 35 to rotate and move in the optical axis direction is described. However, the present invention is not limited thereto. (Not shown), the entire lens unit frame 37 is coupled, or as shown in Fig. 5, the shutter base 39 is coupled to the inside of the subject side of the zoom ring 35, and the shutter base 39 It is also possible to be coupled to the entire lens unit frame 37 so as to rotate and move straight in the optical axis direction. Therefore, the entire lens unit frame 37 can be applied to the present invention as long as the structure can adjust the focusing by rotating and moving in the optical axis direction.

In addition, a barrier assembly 41 for protecting the lens of the camera is coupled to the object-side front end of the zoom ring 35.

In addition, the focusing adjusting means 43 is installed to move the entire lens unit frame to a predetermined position in conjunction with the rotation of the helicoid ring 29 so that the focusing can be adjusted in conjunction with the zooming.

As shown in FIG. 6, the focusing adjusting means 43 is engaged with and engaged with the first focus cam lever 45 and the first focus cam lever 45 which rotate in conjunction with the helicoid ring 29. By rotating the second focus cam lever 47 and the second focus cam lever 47, the rotational force of the second focus cam lever 47 is moved so that the entire lens unit frame 37 can move the near and far focusing positions. It optionally has a torsion spring 49 which transmits to the entire lens unit frame 37. And the front lens unit frame 37 is coupled to the power transmission member 51 that can transmit the rotational force transmitted through the torsion spring (49). In addition, the power transmission member 51 is configured such that a rotational force that is always rotated in a constant direction on the entire lens unit frame by fixing the elastic member on one side.

FIG. 7 is an exploded perspective view showing the first and second focus cam levers, and FIG. 8 is a combination view of FIG. 7 and shows the first and second focus cam levers 45 and 47.

The first focus cam lever 45 has a projection 45a formed at one end in the circumferential direction, and the projection 45a is fitted into the focus adjustment groove 29e of the heloid ring 29 to provide the focus adjustment groove ( 29e) has a structure that can be moved in close contact. In particular, the tip portion of the protrusion 45a moves along the focus adjustment groove 29e, and at the same time, a certain inclined surface 45b, 45c is allowed to cross the focus adjustment protrusion 29f formed in the focus adjustment groove 29e. Have.

The second focus cam lever 47 is coupled to the other end of the first focus cam lever 45, and the first and second focus cam levers 45 and 47 may be integrally rotated by a snap ring 53 or the like. It is.

A projection 47a is formed on one side of the second focus cam lever 45, and a torsion spring 49 is provided on the outer circumference of the second focus cam lever 45 to coincide with the rotation center. The two free ends 49a and 49b of the toe-spring 50 are fitted into the projection 47a of the second focus cam lever 45.

In addition, the power transmission member 51 fixedly coupled to the outer circumference of the entire lens unit frame 37 has a first protrusion 51a extending in the optical axis direction, and a second protrusion extending in the circumferential direction from the center of the optical axis. 51b) and the 3rd protrusion part 51c are formed.

The first protrusion 51a further extends the free ends 49a and 49b of the torsion spring 49 to be fitted between the free ends 49a and 49b. One end of the tension coil spring 55 is fixed to the second protrusion 51b, and the other end of the tension coil spring 55 is fixed to one side of the shutter block 39. The 2nd protrusion part 51b and the 3rd protrusion part 51c float and arrange | position a fixed space.

Therefore, the projection 45a of the first focus cam lever 45 is always in close contact with the focus adjusting groove 29e of the heloid ring 29 because the tension coil spring 55 pulls the power transmission member 51. It has a structure that can be

The focus adjustment groove 29e and the focus adjustment protrusion 29f of one of the plurality of focus adjustment protrusions 29f, 29g, 29h, and 29i formed in the helicoid ring 29, which is the main part of the present invention, are further described. It demonstrates in detail.

FIG. 9 is a perspective view illustrating the heloidoid ring, FIG. 10 is a view illustrating an inner circumferential surface of the heloidoid ring, and FIG. 11 is a cross-sectional view of the helical ring cut along the line A-A of FIG.

On the inner circumferential surface of the helicoid ring 29, as described above, a focus adjustment groove 29e is formed in which the protrusion 45a of the first focus cam lever 45 is inserted and can be moved. A plurality of focus adjustment protrusions 29f, 29g, 29h, 29i are formed at a constant height at 29e. The focus adjustment protrusions 29f, 29g, 29h, and 29i are not limited to four, but the number of the focus adjustment protrusions 29f, 29g, 29h, and 29i can be increased. .

The following describes in detail the process of focusing at the time of zooming according to the configuration of the present invention.

FIG. 12 is a diagram showing a relationship between the first focus cam lever and the helicoid ring in the zoom magnification preparation step, and FIG. 13A is a view showing a state immediately before the rotation of the first focus cam lever due to the rotation of the helicoid ring. 13B is a view showing a state in which the first focus cam lever is rotated by the rotation of the helicoid ring, and FIG. 13C shows a state in which the first focus cam lever is rotated by the rotation of the helicoid ring. One drawing.

In the power-on state of the camera, the projection 45a of the first focus cam lever 45 is in close contact with the focus adjustment groove 29e of the helicoid ring 29. When the tele or wide switches 7 and 9 are operated in this state, the zoom motor 3 is driven to rotate the barrel idle gear 23 through the power transmission gear group 5. The barrel idle gear 23 is meshed with the gear 29b of the helicoid ring 29 to rotate the helicoid ring 29. Then, the helicoid ring 29 is slidably coupled to the helicoid groove 27 formed on the lens base 27 at the outer circumference of the helicoid ring 29a to rotate and move in the optical axis direction. Will be The guide barrel 31 also moves in the optical axis direction in accordance with the movement of the helical ring 29. The guide barrel 31 is moved by the guide protrusion 31a of the guide barrel 31 to the lens base 27. It is coupled to the linear guide groove (27b) of the) is to be linear movement. As the helicoid ring 29 and the guide barrel 31 move in the optical axis direction, the zoom ring 35 to which the rear lens unit frame 33 and the front lens unit frame 37 are coupled is moved in the optical axis direction. Will move.

In the rear lens unit frame 33, the guide projections 33a and 33b formed on the outer circumferential surface of the rear lens unit movement guide groove 31c of the guide barrel 31 and the rear lens unit movement guide of the helical ring 29 are provided. The guide protrusions 33a and 33b are inserted into the grooves 29d so that the guide protrusions 33a and 33b are guided by the respective rear lens group movement guide grooves 31c and 29d to move in the optical axis direction.

In the zoom ring 35, the guide protrusion 35a is fitted into the zoom ring movement guide groove 31d of the guide barrel 31 and the zoom ring movement guide groove 29c of the helicoid ring 29. The guide protrusion 35a of the 35 is guided by the zoom ring movement guide grooves 31d and 29c of the guide barrel 31 and the helicoid ring 29 to move in the optical axis direction, respectively. As the zoom ring 35 moves in this way, the entire lens unit frame coupled to the inside of the zoom ring 35 also moves in the optical axis direction to realize zooming.

When zooming is performed in this way, the protrusion 45a of the first focus cam lever 45 that is in close contact with the focus adjustment groove 29e of the helical ring 29 is in close contact with the focus adjustment protrusion 29g. 13a) Then, when the helical ring 29 is rotated, the projection 45a is rotated about the axis of the first focus cam lever 45 by the focus adjustment projection 29g (Fig. 13B). Shown in). When the heloidoid ring 29 further rotates, as shown in FIG. 13C, the first focus cam while the protrusion 45a of the first focus cam lever 45 moves to the upper portion of the focus adjustment protrusion 29g. The lever 45 is further moved about the axis. At this time, when the projection 45a of the first focus lever 45 is located in the focus adjustment groove 29e of the heloidoid ring 29, it is in the far focusing position and is in contact with the upper portion of the focus adjustment projection 29g. In the case of near focusing position.

As described above, the first focus cam lever 45 is rotated by the second focus cam lever 47 in accordance with the rotation of the helicoid ring 29 to move the entire lens unit in the optical axis direction to achieve focusing. This focusing adjustment is described in detail with reference to FIGS. 14A, 14B and 14C.

14C is a view showing a far focusing position. In a state in which the protrusion 45a of the first focus cam lever 45 is in close contact with the focus adjustment groove 29e of the heloid ring 29, FIG. The positional relationship between the focus cam lever 47 and the entire lens unit frame 37 is shown.

A torsion spring 49 is coupled to the second focus cam lever 47, and a first protrusion of the power transmission member 51 between the first and second free ends 49a and 49b of the torsion spring 49. 51a) is shown. In addition, a tension coil spring 55 is formed in the shutter base 39 to connect the elastic member fixing protrusion 39a and the second protrusion 51b of the power transmission member 51 so that the entire lens unit frame 37 is in a constant position. It is stopped at.

At this time, as described above, when the helicoid ring 29 rotates and moves in the optical axis direction, the first focus cam lever 45 rotates to rotate the second focus cam lever 47. Then, the projection 47a of the second focus cam lever 47 presses one free end 49a of the torsion spring 49, as shown in Fig. 14B. As the free end 49a moves, the other free end 49b rotates the first protrusion 51a of the power transmission member 51 about the optical axis by the elastic force of the torsion spring 49. Therefore, the power transmission member 51 is rotated, and the entire lens unit frame 37 fixed to the power transmission member 51 is rotated. At this time, one surface of the third protrusion 51c is released from contact with the front lens unit movement limiting protrusion 39b, and one surface of the second protrusion 51b of the power transmission member 51 is the front lens unit movement limiting protrusion 39b. ) To limit the movement of the entire lens unit. The whole lens unit frame 37 in this state is rotated on the shutter base 39 to move toward the subject in the optical axis direction to indicate the near focusing position. At this time, the protrusion 45a of the first focus cam lever 45 is in close contact with the upper surface of the focus adjusting protrusion 29g (which may be one of 29f, 29h, 29i, in some cases) of the helicoid ring 29. do.

FIG. 14C is a view showing a rotation state of the torsion spring and the all-lens lens unit frame when the overrunning of the helicoid ring occurs. FIG.

If the first focus cam lever 45 is overrunning by the helicoid ring 29, the second focus cam lever 47 is also overrunning and the protrusion 47a of the second focus cam lever 47 is overrun. Presses and moves the free end 49a of the torsion spring 49 further. However, the distance between the entire lens unit movement limiting projection 39b of the shutter base 39 and the second projection or third projection of the power transmission member 51 (indicated by D1 and D2 in FIGS. 14A and 14B) is set to the initial setting value. Since it is made to join, it is possible to prevent the missed focusing by overrunning.

15 is a graph showing the movement diagram of the front and rear lens unit according to the result of the embodiment according to the present invention, the horizontal axis represents the rotation angle of the helicoid ring and the vertical axis represents the focal length.

As the zooming according to the present invention is performed, the focal length of the front and rear lens units varies according to the rotation angle of the helicoid ring. In particular, the focusing variable of the front lens unit is variable while zooming is performed. That is, when the projection 45a of the first focus cam lever 45 is in contact with the focus adjustment groove 29e, focusing is performed at the remote focusing positions 61a, 61b, 61c, and 61d of the lens group movement diagram 60 of the entire group. Of the first focus cam lever 45 and the near focusing position of the entire lens unit movement diagram 60 when the projection 45a of the first focus cam lever 45 is in contact with the upper surface of the focus adjustment projections 29f, 29g, 29h, 29i. The focusing is adjusted to (63a, 63b, 63c, 63d).

The camera having the zoom lens barrel driving system according to the present invention can increase the design freedom by a simple structure in which focusing is performed while zooming is realized according to the thickness of the focus adjustment groove formed in the helical ring. It has the advantage of solving the light leakage in.

In addition, by configuring the focusing and zooming operation using the large force of the rotating barrel, it is possible to realize many steps with the required performance at a low cost.

Claims (5)

One motor, A plurality of power transmission gears meshed with the motor to transfer the driving force of the motor; A lens base having a barrel idle gear for receiving driving force from the motor through the plurality of power transmission gears, It is housed in the lens base, a spiral focus adjustment groove is formed on the inner circumferential surface, the focus adjustment unit is formed at an interval corresponding to the lens focal length set so that the thickness of the focus adjustment groove is changed repeatedly, the lens Helicoid ring is powered through the barrel idle gear of the base, A guide barrel accommodated in the helical ring to be relatively rotatable, A zoom ring which is accommodated in the guide barrel and rotates in a direction of an optical axis while being relatively rotated with the helicoid ring by receiving a straight guide of the guide barrel; A rear lens group unit coupled to the guide barrel and the helicoid ring and moving in the optical axis direction in association with the helicoid ring; A magnification adjusting means coupled to the zoom ring and having a front lens that is movable in the optical axis direction and moving in the optical axis direction while controlling a distance between the rear lens group and the front lens unit by driving the motor; It is coupled to one side of the zoom ring and one end is in close contact with the focus adjustment groove of the helical ring or the focus adjustment control, the other end is provided with a focus cam lever for repeatedly moving the entire lens unit in the optical axis direction Focus control means Camera having a zoom lens barrel drive system comprising a. One motor; A plurality of power transmission gears engaged with the motor to transfer driving force of the motors; A lens base fixed to the camera body and having a barrel idle gear configured to receive rotational power of the motor through the plurality of power transmission gears; It is housed in the lens base, the inner circumferential surface has a spiral focus adjustment groove is formed, and the focus adjustment protrusion is formed at regular intervals so that the thickness of the focus adjustment groove is repeatedly changed, and rotates through the barrel idle gear of the lens base. Helicoid ring that rotates and goes straight in the direction of the optical axis by receiving power, A guide barrel housed in the helical ring and moving straight in the optical axis direction, A zoom ring which is accommodated in the guide barrel and rotates in a direction of an optical axis while being relatively rotated with the helicoid ring by receiving a straight guide of the guide barrel, A rear lens group unit coupled to the guide barrel and the helicoid ring and moving in the optical axis direction in association with the helicoid ring; A shutter block fixed to the zoom ring and controlling the amount of light; Magnification control means coupled to the shutter block and having a group lens unit that is rotated and moved in an optical axis direction; A first focus cam lever coupled to one side of the zoom ring and one end of which is in close contact with a focus adjusting groove of the helical ring or the focus adjusting protrusion; A focusing adjusting means coupled to the rotational axis of the first focus cam lever and having a second focus cam lever for interlocking a predetermined distance in the optical axis direction in association with the first focus cam lever; Camera having a zoom lens barrel drive system comprising a. The method of claim 2, The front lens unit includes a zoom lens barrel driving system connected to the shutter block and an elastic member such that one end of the first focus cam lever is always in close contact with a focus adjusting groove and a focus adjusting protrusion formed in the heloid ring. With camera. A motor housed in the camera body for zooming and focusing; A plurality of power transmission gears engaged with the motor to reduce and transmit the driving force of the motor; A lens base fixed to the camera body and having a plurality of helicoid grooves and a plurality of linear guide grooves formed in a spiral direction on an inner circumferential surface thereof; A barrel idle gear engaged with the plurality of power transmission gears and coupled to the lens base to transmit rotational force of the motor; A plurality of helicoid protrusions are formed in a spiral shape on the outer circumferential surface to be coupled to the plurality of helicoid grooves formed on the inner circumferential surface of the lens base so as to rotate and move in the optical axis direction. Gear teeth are formed on the outer circumferential surface to rotate and move in the optical axis direction by receiving the rotational power of the motor, and focus adjustment grooves are formed on the inner circumferential surface in the helical direction, and the focus adjustment protrusions are repeatedly changed in thickness in the focus adjustment groove. Helicoid ring is formed; It is relatively rotatably coupled to the helicoid ring, and coupled to the lens base so as to move straight along the linear guide groove in the optical axis direction, and a plurality of all-group lens unit movement guide grooves and zoom in the optical axis direction. A guide barrel having a long ring movement guide groove; A zoom ring formed at one side of an outer circumferential surface thereof so as to be coupled to the zoom ring moving guide groove formed in the guide barrel, and moving straight in the optical axis direction by receiving the guide of the zoom ring moving guide protrusion; A rear lens group unit having a plurality of guide protrusions formed on an outer circumference thereof so as to be fitted into the rear lens group moving guide groove of the guide barrel and moving in the optical axis direction in association with the guide barrel and the heloid ring; A shutter block fixed to the zoom ring and controlling the amount of light; A lens group unit coupled to the shutter block and rotating and moving in an optical axis direction; A first focus cam lever disposed at an inner circumference of the zoom ring, the first focus cam lever rotating at a predetermined interval by being in close contact with the focus adjustment groove and the focus adjustment protrusion of the heloid ring; A second focus cam lever fixedly coupled to the rotation shaft of the first focus cam lever and rotating in association with the rotation of the first focus cam lever; The rotational force of the second focus cam lever is transmitted to the all-lens unit so as to rotate together with the second focus cam lever and contact one side of the all-lens lens so as to repeatedly move the near and the long distance of the focus according to the rotation of the second focus cam lever. Torsion springs; Camera having a zoom lens barrel drive system comprising a. The method of claim 4, wherein And a zoom lens barrel driving system having a tension coil spring connected between the entire lens group and the shutter block to limit rotation of the entire lens.