CN2784956Y

CN2784956Y - Digital camera zooming lens

Info

Publication number: CN2784956Y
Application number: CN 200420103586
Authority: CN
Inventors: 简扬昌; 林国隆
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2004-12-29
Filing date: 2004-12-29
Publication date: 2006-05-31
Anticipated expiration: 2014-12-29

Abstract

The utility model relates to a digital camera zooming lens, which comprises a first lens barrel, a second lens barrel, a first lens group, a second lens group, a column sleeve barrel and an outer sleeve barrel, wherein the first lens group and the second lens group are respectively accommodated in the first lens barrel and the second lens barrel; the first lens barrel, the second lens barrel and the column sleeve barrel are accommodated in the outer sleeve barrel. The side wall of the first lens barrel and the outer surface of the second lens barrel are provided with threads; the inner surface of the side wall of the column sleeve barrel is provided with a thread which can be matched with the two threads. An opening is arranged on the side wall of the outer sleeve barrel; the column sleeve barrel is shown through the opening. A device which can limit the first lens barrel to rotate is arranged on the inner surface of the side wall of the outer sleeve barrel; the second lens barrel is fixed relatively to the outer sleeve barrel.

Description

Zoom lens of digital camera

[technical field]

The utility model is about a kind of zoom lens of digital camera, especially about a kind of mobile phone zoom lens of digital camera.

[background technology]

Along with Development of Multimedia Technology, digital camera, video camera more and more are consumers in general's favor, pursue miniaturization simultaneously at people's logarithmic code camera, video camera, people wish can take in same position the image of the different object of far and near distance, and the image frame that obtains is clear, digital camera arises at the historic moment thus, and the zoom of camera is to realize by the camera lens zoom in the camera.

Generally speaking, the zoom mode of digital camera lens is divided into two kinds of Digital Zoom and optical zooms.Digital Zoom is charge-coupled device (the Charge CoupledDevice that utilizes image sensor, call CCD in the following text) local imaging, promptly in the original photo of taking, choose an amplification, though digital camera can improve image quality to a certain extent by modes such as interpolation, Digital Zoom is to be the zoom of cost to sacrifice resolution and picture quality.The optical zoom of digital camera is to rely on the optical lens structure to realize zoom, promptly pass through the relative position of each eyeglass of change zoom lens, thereby the focal length that changes camera lens amplifies the scenery that is taken or dwindles, and the optical zoom multiple is big more, and it takes just clear more than the distant view thing.Thus, people realize the zoom of camera lens usually by optical zoom.

A kind of existing zoom lens that is used for digital camera, be on the optical axis straight line, to do relative motion by the lens barrel group to realize optical zoom, as announce in No. the 225008th, the TaiWan, China patent on June 11st, 1994 announcement, please refer to Fig. 1, it has disclosed the zoom lens of a digital camera, it comprises an outer sleeve 10, one cylindrical cam sleeve 12, one set collar 13 and a lens barrel group 14, be provided with some straight-line grooves 101 in this outer sleeve 10, can be for protruding key set on this set collar 13 131 engagings, make set collar 13 floating locking in outside the cylindrical cam sleeve 12, lens barrel group 14 includes first lens barrel 142 and second lens barrel 144, set collar 13 is provided with spacer 132 and is sticked in locating slot 145 on second lens barrel 144, to limit second rotation of lens, spacer 143 on first lens barrel 142 is sticked in the locating slot 145, be subjected to the restriction of second lens barrel 144 and can not rotate, first lens barrel 142 and second lens barrel, the 144 outer rollers 15 that are provided with, can make cylindrical cam sleeve 12 on the optical axis straight line, do linear moving by gear 121 effects of slotted hole groove 102 bottom cylindrical cam sleeve 12 outer walls that outer sleeve 10 1 sides are offered, and then make lens barrel group 14 on the optical axis straight line, do relative motion, realize zoom function.

This zoom lens moves by the eyeglass of the moving belt index glass head of lens barrel, though can realize the optical zoom of camera, still, this zoom lens volume is bigger than normal, is difficult to be installed in the mobile phone, realizes the optical zoom function of mobile phone with digital camera; In addition, the Zoom lens structure of this digital camera is complicated.

In view of above shortcoming, provide a kind of simple in structure, easy to operate and can be used for the zoom lens of digital camera of mobile phone.

[summary of the invention]

It is a kind of simple in structure, easy to operate and can be used for the zoom lens of digital camera of mobile phone that the purpose of this utility model is to provide.

To achieve these goals, the utility model provides a kind of zoom lens of digital camera, it comprises one first lens barrel, one second lens barrel, one first lens combination, one second lens combination, one cylindrical sleeves and an outer sleeve, this first lens combination and this second lens combination are contained in respectively in this first lens barrel and this second lens barrel, this first lens barrel, this second lens barrel and this cylindrical sleeves are contained in this outer sleeve, this first lens barrel sidewall and this second lens barrel outside surface are provided with screw thread, this cylindrical sleeves side wall inner surfaces be provided with can with the screw thread of above-mentioned two threads engaged, offer opening on this outer sleeve sidewall, this cylindrical sleeves reveals by this opening, the device that can limit the rotation of first lens barrel is set on this outer sleeve side wall inner surfaces, and this second lens barrel this outer sleeve is relatively fixed.

Compare prior art, the utility model zoom lens of digital camera moves lens group by the rotating cylindrical sleeve as straight line along optical axis in outer sleeve, realizes optical zoom, and is simple in structure, easy to operate; In addition, it is less that the utility model zoom lens of digital camera relates to component count, and volume is less, and it can be built in the mobile phone.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of the zoom lens of existing digital camera;

Fig. 2 is the three-dimensional exploded view of the utility model zoom lens of digital camera;

Fig. 3 is the three-dimensional assembly diagram of the utility model zoom lens of digital camera.

[embodiment]

See also shown in Figure 2, the utility model zoom lens of digital camera 20 comprises one first lens barrel 21, one second lens barrel 23, one first lens combination (figure does not show), one second lens combination (figure does not show), a cylindrical sleeves 22 and an outer sleeve 24, below outer sleeve 24, be provided with Image Sensor in addition, be used for the sensing incident light line, the utility model zoom lens of digital camera 20 can place in the mobile phone.

First lens barrel 21, second lens barrel 23 and cylindrical sleeves 22 are all hollow cylindrical, and first lens combination and second lens combination are contained in respectively in first lens barrel 21 and second lens barrel 23, and the optical axis of first lens combination and second lens combination remains on the same straight line.One end of first lens barrel 21 extends a protuberance 212 along vertical axial.First lens barrel 21 and second lens barrel, 23 sidewall outside surfaces are respectively equipped with external thread 214,234, cylindrical sleeves 22 side wall inner surfaces be provided with can with screw thread 214,234 internal threads that match, cooperation by screw thread, first lens barrel 21 and second lens barrel 23 match with cylindrical sleeves 22, cylindrical sleeves 22 is placed in first lens barrel 21 and second lens barrel, 23 outsides, first lens barrel 21 and second lens barrel 23 can be with respect to cylindrical sleeves 22 spinning in and out, wherein, screw thread 214 is opposite with the rotation direction of screw thread 234, pitch is identical, during rotary cylinder sleeve 22, first lens barrel 21 and second lens barrel 23 move dorsad.Cylindrical sleeves 22 sidewall outside surfaces are uneven surface, and this uneven surface can be groove 224, by the manual rotating cylindrical sleeve 22 of groove 224.

Please in conjunction with consulting Fig. 2 and Fig. 3, outer sleeve 24 is similarly hollow cylindrical, and first lens barrel 21, second lens barrel 23 and cylindrical sleeves 22 all are housed in the outer sleeve 24.Offer opening 244 on outer sleeve 24 sidewalls, cylindrical sleeves 22 reveals by opening 244, for manual adjustments.One groove 242 is opened on outer sleeve 24 side wall inner surfaces, and groove 242 extends along the direction parallel with the lens combination optical axis, also can slide therein in set protuberance 212 is sticked on first lens barrel 21, as the guide rail of first lens barrel, 21 axially-movables.The outer sleeve 24 and second lens barrel 23 all are installed on the camera body.

Manually during zoom, by opening 244 rotary cylinder sleeves 22, because the protuberance 212 on first lens barrel 21 is subjected to the restriction of the groove 242 on outer sleeve 24 sidewalls, and the cooperation of the screw thread on screw thread 214,212 and cylindrical sleeves 22 side wall inner surfaces, make the rotation of cylindrical sleeves 22 convert moving axially of first lens barrel 21 to, first lens barrel 21 and second lens barrel 23 are relatively moved on the optical axis straight line, thereby reach the function of zoom.

Second embodiment of the present utility model (figure does not show) is roughly the same with first embodiment, difference is: second lens barrel 23 is not fixed on the camera body, and a protuberance is set on second lens barrel 23, this protuberance is sticked in the groove 242, and second lens barrel 23 is assemblied on the outer sleeve 24.Screw thread 214 is identical with screw thread 234 rotation directions, but the pitch difference, during rotary cylinder sleeve 22, first lens barrel 21 is identical with second lens barrel, 23 relative cylindrical sleeves 22 moving directions, and distance is different, thereby makes

first lens barrel

21 and 23 relative motions of second lens barrel.In addition, the gear that drives by groove 224 and motor matches, and drives cylindrical sleeves 22 and rotates, and can realize autozoom.

Claims

1. zoom lens of digital camera, it comprises one first lens barrel, one second lens barrel, one first lens combination, one second lens combination, one cylindrical sleeves and an outer sleeve, this first lens combination and this second lens combination are contained in respectively in this first lens barrel and this second lens barrel, this first lens barrel, this second lens barrel and this cylindrical sleeves are contained in this outer sleeve, it is characterized in that: this first lens barrel sidewall and this second lens barrel outside surface are provided with screw thread, this cylindrical sleeves side wall inner surfaces be provided with can with the screw thread of above-mentioned two threads engaged, offer opening on this outer sleeve sidewall, this cylindrical sleeves reveals by this opening, the device that can limit the rotation of first lens barrel is set on this outer sleeve side wall inner surfaces, and this second lens barrel this outer sleeve is relatively fixed.

2. zoom lens of digital camera as claimed in claim 1 is characterized in that: an end of this first lens barrel extends a protuberance along vertical axial.

3. zoom lens of digital camera as claimed in claim 2 is characterized in that: on this outer sleeve side wall inner surfaces, offer a groove on the direction parallel with the lens combination optical axis of edge, in set protuberance is sticked on first lens barrel.

4. zoom lens of digital camera as claimed in claim 3 is characterized in that: a protuberance is located on this second lens barrel, can be sticked in this groove.

5. zoom lens of digital camera as claimed in claim 3 is characterized in that: this second lens barrel and this outer sleeve are fixedly arranged on the camera body.

6. as claim 4 or 5 described zoom lens of digital camera, it is characterized in that: the thread rotary orientation of the screw thread of this first lens barrel outside surface and this second lens barrel outside surface is opposite, and pitch is identical, the screw thread relative set of this cylindrical sleeves side wall inner surfaces.

7. as claim 4 or 5 described zoom lens of digital camera, it is characterized in that: the screw thread of this first lens barrel outside surface is identical with the thread rotary orientation of this second lens barrel outside surface, pitch difference, the screw thread relative set of this cylindrical sleeves side wall inner surfaces.

8. zoom lens of digital camera as claimed in claim 1 is characterized in that: this cylindrical sleeves sidewall outside surface is a uneven surface.

9. zoom lens of digital camera as claimed in claim 8 is characterized in that: this uneven surface is the groove face.