KR20050009087A - Barrel Assembly of a zoom camera - Google Patents

Abstract

PURPOSE: A barrel assembly is provided to combine barrels and motors of a camera having a zoom and a focus functions in a compact structure. CONSTITUTION: A zoom motor(1) and a focusing motor(3) are combined with a lens base(5). A cam barrel(7) is combined with the lens base by driving force of the zoom motor. A first cam groove(7a) and a second cam groove(7b) are formed in the inner circumference of the cam barrel in a spiral direction. A guide barrel(9) is arranged inside the cam barrel and combined with the lens base. Straight guide grooves(9a,9b) is formed in an optical axial direction and a through-hole(9c) penetrated outside are formed in the guide barrel. A zoom ring(11) has plural first cam protrusions(11a) guided in the first cam groove by combining with the first cam groove for moving toward the optical axial direction through the rotation of the cam barrel by arranging between the inside of the cam barrel and the guide barrel. A guide protrusion(11b) guided by inserting in the straight guide groove and a first lens group are formed in the zoom ring. A lens barrel(13) has more than one second cam pins(13b), many guide protrusions(13a) and a second lens group. The second cam pins are guided by combining with the second cam grooves by passing through the through hole to directly move toward the optical axial direction. The guide protrusions are guided by combining with the straight guide groove. A focus lens is arranged inside the lens barrel to move toward the optical axial direction by the driving of the focusing motor. Thereby, the size of a barrel assembly is reduced.

Description

Barrel Assembly of a zoom camera}

The present invention relates to a barrel assembly of a zoom camera, and more particularly, to a digital camera having a zoom and focus function, and to a barrel assembly of a zoom camera capable of minimizing the diameter of the entire barrel.

In general, a camera has a plurality of barrels and a plurality of motors for driving the barrels to realize zooming and focusing. Such a camera is being developed into a structure in which the arrangement and coupling structure of the barrels and the motor can be miniaturized. However, the existing zooming function is realized, and in particular, a camera applied to a digital camera needs to be further miniaturized, but there is a problem in that it cannot be sufficiently handled.

Accordingly, the present invention has been proposed to solve the above problems, and an object of the present invention is to provide a barrel assembly of a zoom camera combining a barrel and motors of a camera having a zoom and focus function in a compact structure.

Another object of the present invention is to provide a barrel assembly of a compact zoom camera by keeping the diameter of the barrel to a minimum.

In order to achieve the above object, the present invention, the lens base coupled to the zoom motor and the focusing motor; A cam barrel coupled to the lens base rotatably by a driving force of the zoom motor, the cam barrel having a first cam groove and a second cam groove provided in a spiral direction on an inner circumferential surface thereof; A guide barrel disposed inside the cam barrel, coupled to the lens base, provided with guide grooves straight in the optical axis direction on the inner side and the outer side, and having a through hole penetrating outward; A first cam protrusion disposed between an inner side of the cam barrel and the guide barrel and coupled to a first cam groove of the cam barrel so as to move straight in the optical axis direction by rotation of the cam barrel; A zoom ring provided with a plurality of outer circumferential surfaces and having a guide protrusion inserted into and guided in a straight guide groove provided outside the guide barrel, the zoom ring having a first lens group; The outer circumferential surface is provided with at least one second cam pin which is disposed inside the guide barrel and is coupled to the second cam groove provided on the inner circumferential surface of the cam barrel and guided through the through hole of the guide barrel so as to move straight in the optical axis direction. A lens barrel having a plurality of guide protrusions coupled to a straight guide groove provided on an inner circumferential surface of the guide barrel and having a second lens group; Provided is a barrel assembly of a zoom camera including a focus lens disposed inside the lens barrel to be movable in the optical axis direction by the driving of the focusing motor.

In the barrel assembly of the zoom camera according to the present invention, the cam barrel rotates as the zoom motor is driven, and the zoom ring and the lens barrel are guided to the guide barrel and move straight in the optical axis direction as the cam barrel rotates. Is done. The focusing is performed by moving the focusing lens in the optical axis direction according to the driving of the focusing motor. The guide barrel may be provided with a space in which a portion of the focusing motor may be accommodated inside the guide barrel, thereby manufacturing a compact camera by accommodating the focusing motor therein while maintaining a minimum diameter of the barrel.

1 is an exploded perspective view showing a barrel assembly of a camera for explaining a first embodiment according to the present invention.

FIG. 2 is a perspective view illustrating main parts of FIG. 1. FIG.

3 is a partial cross-sectional view of a part of the barrel closed state in the assembled state of FIG.

4 is a cross-sectional view of a wide state corresponding to FIG. 3.

5 is a cross-sectional view of the barrel assembly of FIG. 3 taken in the optical axis direction.

6 is a cross-sectional view of the barrel assembly of FIG. 4 taken in the optical axis direction.

7 is an exploded perspective view illustrating a barrel assembly of a camera for describing a second embodiment according to the present invention.

8 is a cross-sectional view illustrating a state in which the barrel assembly of the camera is assembled in the optical axis direction in order to explain the second embodiment according to the present invention.

9 is an exploded perspective view illustrating a barrel assembly of a camera in order to describe a third embodiment according to the present invention.

FIG. 10 is a cross-sectional view illustrating the barrel assembly of the camera assembled in the optical axis direction to explain the third embodiment according to the present disclosure.

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

1 is an exploded perspective view illustrating a barrel assembly of a zoom camera for explaining a first embodiment according to the present invention, and FIG. 2 is a view illustrating a main part of FIG. 1 and coupled to a camera body (not shown). A lens base 5 having a zoom motor 1 and a focusing motor 3, a cam barrel 7 rotated by the zoom motor 1, and disposed inside the cam barrel 7, A guide barrel 9 fixed to the lens base, a zoom ring 11 and a lens barrel 13 which are guided to the guide barrel 9 and move straight in the optical axis direction by the rotation of the cam barrel 7 are shown. Doing.

The lens base 5 is coupled to a camera body (not shown), and the zoom motor 1 and the focusing motor 3 are coupled. The zoom motor 1 has a structure in which a gear tooth (not shown) is coupled to a rotating shaft to rotate the cam barrel 7.

The cam barrel 7 has a structure in which an outer circumferential gear portion 7a is provided and coupled with the gear value of the zoom motor 1 to rotate by the driving of the zoom motor 1.

In the cam barrel 7, the first cam groove 7b and the second cam groove 7c may be substantially spirally formed on an inner circumferential surface thereof.

The guide barrel 9 is coupled to the lens base 5 by a fastening member such as a screw. The guide barrel 9 is provided with a guide groove 9a straight in the optical axis direction on the outer circumferential surface, and another straight guide groove 9b in the optical axis direction on the inner circumferential surface. A through hole 9c into which the cam protrusion of the lens barrel 13 to be described later can be inserted is provided.

The guide barrel 9 is preferably arranged inside the cam barrel 7.

In addition, as shown in FIG. 2, the guide barrel 9 is provided with a space 9d so that a part of the focusing motor 3 described above can be accommodated.

The zoom ring 11 is disposed between the cam barrel 7 and the guide barrel 9 and has a first cam pin on an outer circumferential surface thereof so as to be inserted into the first cam groove 7b of the cam barrel 7. 11a is provided. In addition, the zoom ring 11 slides on the straight guide groove 9a provided on the outer circumferential surface of the guide barrel 9 to guide the projections 11b on the inner circumferential surface so as to move straight in the optical axis direction. Is provided. The zoom ring 11 is provided with a first lens group 15 therein.

The lens barrel 13 is disposed inside the guide barrel 9, and includes a second lens group 17 therein, and a straight guide protrusion 13a is provided on an outer circumferential surface thereof. The straight guide protrusion 13a is guided to the straight guide groove 9b provided in the guide barrel 9 so as to guide the lens barrel 13 to move in the optical axis direction.

In addition, the outer circumferential surface of the lens barrel 13 passes through the through hole 9c provided in the guide barrel 9 and is guided to the second cam groove 7c provided in the inner circumferential surface of the cam barrel 7 to provide the lens barrel. A second cam pin 13b is provided so that 13 can move in the optical axis direction.

The lens barrel 13 is provided with a cutout portion 13c through which a portion of the lens barrel 13 is cut so that a portion of the focusing motor 3 described above may protrude.

The focusing motor 3 is coupled to the lens base 5, as shown in FIG. 3, with the rotation axis 3a disposed in the optical axis direction, and a thread provided on the outer circumferential surface. In addition, the connecting member 21 fixing the focusing lens group 19 is screwed to the rotation shaft 3a of the focusing motor 3. That is, the connecting member 21 fixing the rotating shaft 3a of the focusing motor 3 and the focusing lens group 19 is screwed together so that the focusing lens group 19 is driven by the driving of the focusing motor 3. This is to move in the optical axis direction.

The focusing motor 3 is partially accommodated in the space 9d (shown in FIG. 2) provided in the guide barrel 9 through the cutout portion 13 of the lens barrel 13.

The arrangement structure of the focusing motor 3 has a structure in which the focusing motor 3 can be accommodated while minimizing the diameter of the guide barrel 9.

5 and 6, reference numeral 31 denotes an aperture / shutter section, and reference numeral 33 denotes an imaging device CCD. The diaphragm / shutter portion is a portion having a normal diaphragm function and a shutter function, and the image pickup device 33 has a light receiving surface as a pixel of an electric signal by sampling a current of a photodiode converted by the intensity of light. That is, the image pickup device 33 may form an image of a subject drawn through the lenses and convert the image into an electrical signal.

The operation of the barrel assembly of the zoom camera of the present invention will be described in detail as follows. 3 and 5 show the barrel assembly accommodated, and FIGS. 4 and 6 show the zooming.

When the zoom motor 1 is driven, the driving force of the zoom motor 1 is transmitted to the gear portion 7a of the cam barrel 5 so that the cam barrel 7 rotates. As the cam barrel 7 rotates, the first and second cam pins 11a and 13b provided to the zoom ring 11 and the lens barrel 13 are first and second guide grooves 7b of the cam barrel 7. , 7c), and at the same time, the guide protrusion 11b provided to the zoom ring 11 is guided to the straight guide groove 9a of the guide barrel 9, and the guide protrusion provided to the lens barrel 13 13a is guided to another straight guide groove 9b of the guide barrel 9 so that the zoom ring 11 and the lens barrel 13 are moved in the optical axis direction to achieve zooming.

The driving shaft 3a rotates in response to the driving of the focusing motor 3, and the connecting member 21 moves in the optical axis direction according to the rotation of the driving shaft 3a of the focusing motor 3. At this time, as the focusing lens group 19 moves in the optical axis direction as the connection member 21 moves, focusing is performed.

According to the first embodiment of the present invention, the focusing motor 3 penetrates the cutout 13c of the lens barrel 13 and is simultaneously accommodated in the space 9d of the guide barrel 9. By providing a structure that can minimize the diameter of), it is possible to manufacture a compact zoom camera.

FIG. 7 is an exploded perspective view illustrating a second embodiment of the present invention, and FIG. 8 is a cross-sectional view of the barrels of FIG. 7 assembled in the optical axis to illustrate a barrel assembly of a zoom camera.

In the second embodiment of the present invention, only the differences from the first embodiment described above will be described, and the same parts will be replaced with the above description.

In the first embodiment, a part of the focusing motor 3 may be accommodated in the space 9d of the guide barrel 9, but in the second embodiment of the present invention, a part of the guide barrel 9 Has a structure in which the hole 9e is penetrated, and a part of the focusing motor 3 is inserted into the hole 9e of the guide barrel 9. This second embodiment has the same effect as the first embodiment, but can implement a smaller guide barrel 9 of a smaller size regardless of the size of the focusing motor 3 has an advantage of further miniaturization.

FIG. 9 is an exploded perspective view illustrating a third embodiment of the present invention, and FIG. 10 is a cross-sectional view of the barrels of FIG. 9 assembled in the optical axis to illustrate a barrel assembly of a zoom camera.

In the third embodiment of the present invention, only the differences from the second embodiment described above will be described, and the same parts will be replaced with the above description.

In the second embodiment, a portion of the focusing motor 3 may be accommodated in the through hole 9e of the guide barrel 9, but in the third embodiment of the present invention, the guide barrel 9 A portion of the zoom ring 11 has a space 11c (shown in FIG. 9) or a portion of the focusing motor 3 into which a portion of the zoom ring 11 can be inserted. And a part of the focusing motor 3 is formed by the hole 9e of the guide barrel 9 and the space 11c of the zoom ring 11 or a part of the focusing motor 3. It has a structure inserted into a through hole (not shown). The penetrated hole 11c is a hole formed through the zoom ring 11 and is not visible from the outside when the zoom ring 11 is accommodated in the barrel. In the section, this penetrated hole can be seen from the outside. Therefore, the outer circumferential surface of the zoom ring 11 comes out from the wide section to the tele section, and the engaging portion of the zoom ring 11 and the cam barrel 7 does not protrude to the outside, and the zoom ring 11 is the cam barrel. It is preferable to form the through hole 11c in the region of the zoom ring 11 which is not separated from (7).

This third embodiment has the same effect as the second embodiment, but can implement a guide barrel 9 of smaller size, which is advantageous in miniaturization.

In the above embodiments, the space 9d or through hole 9e provided in the guide barrel 9 and the space 11c or hole (not shown) provided in the zoom ring 1 interfere with each other when the barrel assembly is operated. It is preferable to arrange | position within the range which is not.

As described above, the present invention provides a structure in which a cam barrel rotated by a zoom motor is disposed on the outside, the guide barrel is fixed to the lens base, and the zoom ring and the lens barrel move straight in the optical axis direction as the cam barrel rotates. As a result, the size of the barrel assembly can be reduced, so that the zoom camera can be made compact.

In addition, the present invention has a groove in which a portion of the focusing motor can be accommodated in the inner portion of the guide barrel, or a space in which a portion of the focusing motor can be accommodated to maintain the minimum diameter while maintaining the minimum diameter of the guide barrel By providing a structure that can be accommodated inside of the effect that can be made more compact zoom camera.

In addition, the present invention has a space for accommodating a portion of the focusing motor in the guide barrel and a space for accommodating or penetrating a portion of the focusing motor in a portion of the zoom ring is more compact Has the effect of making a zoom camera.

Claims (8)

A lens base coupled with a zoom motor and a focusing motor; A cam barrel coupled to the lens base rotatably by a driving force of the zoom motor, the cam barrel having a first cam groove and a second cam groove provided in a spiral direction on an inner circumferential surface thereof; A guide barrel disposed inside the cam barrel, coupled to the lens base, provided with guide grooves straight in the optical axis direction on the inner side and the outer side, and having a through hole penetrating outward; A first cam protrusion disposed between an inner side of the cam barrel and the guide barrel and coupled to a first cam groove of the cam barrel so as to move straight in the optical axis direction by rotation of the cam barrel; A zoom ring provided with a plurality of outer circumferential surfaces and having a guide protrusion inserted into and guided in a straight guide groove provided outside the guide barrel, the zoom ring having a first lens group; The outer circumferential surface is provided with at least one second cam pin which is disposed inside the guide barrel and is coupled to the second cam groove provided on the inner circumferential surface of the cam barrel and guided through the through hole of the guide barrel so as to move straight in the optical axis direction. A lens barrel having a plurality of guide protrusions coupled to a straight guide groove provided on an inner circumferential surface of the guide barrel and having a second lens group; A focus lens disposed inside the lens barrel to be movable in an optical axis direction by driving of the focusing motor; Barrel assembly of a zoom camera comprising a. A lens base coupled with a zoom motor and a focusing motor; A cam barrel coupled to the lens base rotatably by a driving force of the zoom motor; A guide barrel disposed inside the cam barrel and coupled to the lens base; A zoom ring disposed between the inner side of the cam barrel and the guide barrel and moving straight in the optical axis direction by the rotation of the cam barrel; A lens barrel disposed inside the guide barrel and moving straight in the optical axis direction in association with rotation of the cam barrel, the lens barrel having a second lens group; A focus lens disposed inside the lens barrel to be movable in an optical axis direction by driving of the focusing motor; Including; And the guide barrel is provided with a focusing motor accommodating space therein so that a portion of the focusing motor can be received in the guide barrel. A lens base coupled with a zoom motor and a focusing motor; A cam barrel coupled to the lens base rotatably by a driving force of the zoom motor; A guide barrel disposed inside the cam barrel and coupled to the lens base; A zoom ring disposed between the inner side of the cam barrel and the guide barrel and moving straight in the optical axis direction by the rotation of the cam barrel; A lens barrel disposed inside the guide barrel and moving straight in the optical axis direction in association with rotation of the cam barrel, the lens barrel having a second lens group; A focus lens disposed inside the lens barrel to be movable in an optical axis direction by driving of the focusing motor; Including; And the guide barrel is provided with a focusing motor receiving hole in a portion thereof so that a portion of the focusing motor can be received outside the guide barrel. A lens base coupled with a zoom motor and a focusing motor; A cam barrel coupled to the lens base rotatably by a driving force of the zoom motor; A guide barrel disposed inside the cam barrel and coupled to the lens base; A zoom ring disposed between the inner side of the cam barrel and the guide barrel and moving straight in the optical axis direction by the rotation of the cam barrel; A lens barrel disposed inside the guide barrel and moving straight in the optical axis direction in association with rotation of the cam barrel, the lens barrel having a second lens group; A focus lens disposed inside the lens barrel to be movable in an optical axis direction by driving of the focusing motor; Including; The guide barrel is provided with a focusing motor receiving hole in a portion so that a portion of the focusing motor can be received outside the guide barrel, And the zoom ring is provided with a focusing motor accommodating space in which a part of the focusing motor can be accommodated, or a focusing motor accommodating hole through which a part of the focusing motor can pass. The method of any one of claims 1 to 4, wherein the focusing motor A connection member disposed in the optical axis direction, having a rotation shaft provided on the outer circumferential surface thereof, and screwed to the connection member fixing the focus lens to the thread, and fixing the focus lens in accordance with the rotation of the rotation shaft in the optical axis direction. Barrel assembly of the zoom camera to move. The barrel assembly of claim 1, wherein the guide barrel is provided with a focusing motor accommodating space so that a portion of the focusing motor can be accommodated in the guide barrel. The method of claim 1, wherein the guide barrel Barrel assembly of a zoom camera provided with a focusing motor receiving hole in a portion so that a portion of a focusing motor can be received outside the guide barrel. The method of claim 1, wherein the guide barrel is provided with a focusing motor receiving hole in a portion so that a portion of the focusing motor can be received outside the guide barrel, And the zoom ring is provided with a focusing motor accommodating space in which a part of the focusing motor can be accommodated, or a focusing motor accommodating hole through which a part of the focusing motor can pass.