CN2784977Y - Automatic focusing device - Google Patents
Automatic focusing device Download PDFInfo
- Publication number
- CN2784977Y CN2784977Y CN200420102395.8U CN200420102395U CN2784977Y CN 2784977 Y CN2784977 Y CN 2784977Y CN 200420102395 U CN200420102395 U CN 200420102395U CN 2784977 Y CN2784977 Y CN 2784977Y
- Authority
- CN
- China
- Prior art keywords
- lens barrel
- automatic focusing
- focusing mechanism
- gear
- set collar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides an automatic focusing device, which comprises a lens seat, a lens barrel and a drive motor, wherein the lens barrel is installed on the lens seat. The automatic focusing device further comprises a transmission gear which comprises a driving gear and a driven gear, wherein the driving gear is engaged with the driven gear. The driving gear is connected with the drive motor; the driven gear is sheathed on the lens barrel and drives the lens barrel to move.
Description
[technical field]
The utility model relates to a kind of automatic focusing mechanism, relates in particular to a kind of simple in structure, automatic focusing mechanism that volume is little.
[background technology]
Digital camera and mobile phone use the camera lens module of camera behind the assembling camera lens, limited by each manufacturing process of components, there is error unavoidably in lens focus, must through adjust, check and correction, can make through the image definition of camera lens be projeced on the image photoreceptor of digital camera.
Existing digital camera and mobile phone, can move forward and backward camera lens, thereby adjust the focal length that camera lens is focused mainly by adjusting gear is set on camera lens with the camera lens module of camera.And the mode of focusing often has dual mode at present: one is manual focus, and two is focusing automatically.
As shown in Figure 1, a kind of manual focus camera lens module comprises a lens barrel 11, a sleeve 12, a base 13.Lens barrel 11 built-in some lens set are provided with one first retainer 114 along its axis direction.Base 13 is provided with an annular seating 133, and its medial surface is provided with one second retainer 137, can cooperate with first retainer 114.Sleeve 12 is a ducted body, and its inside surface is equipped with internal thread, and lens barrel 11 outside surface rings are established external thread, by the external thread of lens barrel 11 outer walls and the internal thread of this sleeve 12 inwalls lens barrel 11 and sleeve 12 is spirally connected, and then is inserted in the annular seating 133.This kind camera lens modular structure can pass through manual turnbarrel 12, by the screw thread transmission of sleeve 12 with lens barrel 11, and second retainers 137 in the base 13 only join with first retainer 114 in the lens barrel 11, drive lens barrel 11 and move forward and backward, thereby realize manual focus.Correlation technique sees also China's Mainland patent 03268097.X number.
Only, this kind manual focus mode is regulated camera lens incompatibility amateur and is used, and mobile phone often is a Digital Zoom with the digital camera focal length at present, image quality is not high, along with the raising of people to imaging requirements, also need adopt optical zoom apparatus, and with the camera lens module that the manual focus mode is regulated camera lens be used for mobile phone with on the camera because of the too little operating difficulties of volume.
The TaiWan, China patent discloses a kind of automatic focusing mechanism No. 91613368, and this camera lens mainly comprises a body, a support body, a lens barrel, a camera lens.Support body places in the body, the lens barrel Built-in lens.Wherein this support body comprises a support body retainer, is assembled with a CD-ROM drive motor on the support body retainer, a gear set, and the drive motor gear set is with focusing, and gear set comprises one first driving cog and second driving cog.Tool one elongated slot is provided with a screw rod on the support body retainer in it, drives piece and be set with one on the screw rod, and this drive piece contacts with lens barrel and moves in elongated slot.Be provided with positioning piece near gear set one end on the screw rod, itself and screw rod rotate synchronously.First transmission gear of gear set and keeper engagement drive screw rod, and second transmission gear is the fine setting tooth in order to the first bulge loop surface on the cooperation lens barrel, thereby realize focusing.
To realize focusing, precisely because complex structure is difficult for assembling, Lens is excessive by the transmission of drive motor gear set for this kind camera.
Therefore, provide a kind of simple in structure and automatic focusing mechanism that volume is little, real belong to necessary.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of simple in structure, automatic focusing mechanism that volume is little.
The technical solution of the utility model is: a kind of automatic focusing mechanism, and it comprises a lens mount, a lens barrel, a CD-ROM drive motor; Lens barrel is installed on the lens mount, and this automatic focusing mechanism further comprises a transmission gear, and this transmission gear comprises a driving gear and a follower gear, driving gear and follower gear engagement; Driving gear links to each other with CD-ROM drive motor, and follower gear is sleeved on the lens barrel and drives the lens barrel motion.
Compared with prior art, the utility model automatic focusing mechanism also comprises a transmission gear, can move forward and backward thereby drive lens barrel by this transmission gear of drive motor, focuses automatically to realize lens barrel.Simultaneously, this transmission gear comprises the driving gear and the follower gear of engagement, and driving gear links to each other with CD-ROM drive motor, and follower gear is sleeved on the lens barrel.This kind structure can reduce Lens relatively, and is simple in structure.
The automatic focusing mechanism of this kind structure is for the amateur, but the simple realization focusing, and the camera lens volume is little, simple in structure, can be convenient to be installed in the mancarried devices such as camera or mobile phone.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of prior art manual focus device.
Fig. 2 is the stereographic map of the utility model automatic focusing mechanism.
Fig. 3 is the three-dimensional exploded view of the utility model automatic focusing mechanism.
[embodiment]
See also Fig. 2 and Fig. 3, the utility model automatic focusing mechanism 100 comprises a lens mount 1, one lens barrel 2, one CD-ROM drive motor, 3, one transmission gears 4 and a lens cap 5.Lens barrel 2 is built-in with lens set (figure does not show), is installed on the lens mount 1, and CD-ROM drive motor 3 drives transmission gear 4, thereby drives lens barrel 2 focusings.Lens cap 5 can seal on the lens barrel 2 and transmission gear 4 that is installed on the lens mount 1, can prevent that dust from entering automatic focusing mechanism 100 inside.
This lens mount 1 comprises a base plate 10 and a set collar 14, and lens mount 1 lower end is provided with a through hole (figure does not show), and the image definition through camera lens is projeced on the image photoreceptor (figure does not show).Lens mount 1 base plate 10 is one-body molded with set collar 14.Set collar 14 is the circular cavity of a upper end open, and inwall is provided with internal thread 16, can accommodate lens barrel 2.The outer wall of set collar 14 is equipped with one first groove 18, but buckle one bayonet unit 19 in it.This bayonet unit 19 forms by having the bending process of certain thickness bar shaped material, is non-closed annulus, which is provided with a breach (not indicating).The xsect upper end of this bayonet unit 19 is the quadrant arc, makes its outer wall be curved surface, and the lower end of this bayonet unit 19 is a plane.And bayonet unit 19 internal diameters are slightly less than the external diameter of set collar 14, but the width of the width of bayonet unit 19 and first groove 18 is suitable.CD-ROM drive motor 3 and transmission gear 4 can be installed on the other end of lens mount 1 base plate 10.
This lens barrel 2 is built-in with lens set, its outer wall lower end is provided with external thread 22, can match with the internal thread 16 on set collar 14 inwalls, and 14 of lens barrel 2 and set collars can move forward and backward lens barrel 2 to realize focusing by external thread 22 and 16 spiral shells of internal thread are moving so that lens barrel 2 lower ends cooperate with set collar 14.Lens barrel 2 outer walls upper end correspondence is provided with two projectioies 24.
This transmission gear 4 comprises a driving gear 40 and a follower gear 42, driving gear 40 and follower gear 42 engagements.Driving gear 40 is a worm gear, and an end is fixed on one and is inverted on the L shaped baffle plate 44, and the other end links to each other with CD-ROM drive motor 3.Follower gear 42 is a hollow and annular cylinder, and outer wall is provided with tooth bar (not indicating) and driving gear 40 engagements, rotates thereby can make driving gear 40 drive follower gear 42.Corresponding second groove 46 that is provided with the tool certain altitude in inwall upper end of follower gear 42, it cooperates with two projectioies 24 of lens barrel 2, and lens barrel 2 is rotated with follower gear 42.The inwall lower end correspondence of follower gear 42 is provided with the 3rd groove 48, and is corresponding with bayonet unit 19, bayonet unit 19 is contained in wherein, and follower gear 42 is connected on the set collar 14.
This lens cap 5 is the cavity of a lower ending opening, can be with the set collar 14 of lens mount 1, and lens barrel 2 and transmission gear 4 sealings.Lens cap 5 left ends are slightly cylindrical, can be with set collars 14, and lens barrel 2 and follower gear 42 sealings, and its top also is provided with a circular port 50 that the lens set in the lens barrel 2 is exposed.Lens cap 5 right-hand members are cuboid slightly, cooperates with the L shaped baffle plate 44 of inversion, with driving gear 40 sealings.The assembly of these lens cap 5 sealing automatic focusing mechanisms 100 can prevent that dust from entering inside and influencing focusing.
Please consult Fig. 3 once more, during assembling, bayonet unit 19 is pressed in first groove 18 of set collar 14.The lower end that makes bayonet unit 19 in process of press in is that an end on plane contacts set collar 14 earlier.Because the external diameter of set collar 14 is slightly larger than the internal diameter of bayonet unit 19, bayonet unit 19 need open breach and produce an elastic deformation, thereby its internal diameter is increased set collar 14 is inserted in.After bayonet unit 19 is pressed into first groove 18, then restore to the original state, make the outside of bayonet unit 19 protrude from set collar 14 outsides.At this moment, bayonet unit 19 is contained in first groove 18 of set collar 14 near its inner wall section, is contained in the 3rd groove 48 of follower gear 42 inwalls near its outer wall section, with this follower gear 42 and set collar 14 is blocked.Follower gear 42 can rotate freely around its axis, but can't break away from set collar 14.
Rotation lens barrel 2 makes external thread 22 on lens barrel 2 outer walls be bolted in internal thread 16 on set collar 14 inwalls on the lens mount 1, and lens barrel 2 enters in the set collar 14 thus, and then is installed on the lens mount 1; Two projectioies 24 on 2 second grooves 46 and lens barrel 2 outer walls on follower gear 42 inwalls are cooperated, on the base plate 10 that CD-ROM drive motor 3 that next will be assembled together and transmission gear 4 are positioned over lens mount 1.At last lens cap 5 is covered on set collar 14, lens barrel 2 and transmission gear 4 its sealing.
During focusing, CD-ROM drive motor 3 drives driving gear 40 and rotates, driving gear 40 drive and the follower gear 42 of engagement rotate, and lens barrel 2 is fixed in the follower gear 42, thereby lens barrel 2 rotates together in company with follower gear 42, and then lens barrel 2 is screwed in or screws out set collar 14, because of 2 second grooves, 46 tool certain altitudes, so two projectioies 24 of lens barrel 2 upper ends can be in 2 second grooves 46 corresponding moving forward and backward, thereby realize lens barrel 2 focusings.
Bayonet unit 19 also can adopt other device.As at a plurality of balls of set collar 14 arranged outside, this ball is connected to set collar 14 and can be contained in set collar 14 inside by elastic device.When follower gear 42 was inserted in set collar 14, the inwall of follower gear 42 compressed ball, because the cambered surface of ball and the effect of elastic device, follower gear 42 slips over ball and entangles set collar 14.When the 3rd groove 48 of follower gear 42 slid into the ball top, elastic device obtained discharging, and ball ejects also and snaps in the 3rd groove 48, follower gear 42 is rotated freely around its axis but can't break away from set collar 14.
Claims (10)
1. automatic focusing mechanism, it comprises a lens mount, a lens barrel, a CD-ROM drive motor; Lens barrel is installed on the lens mount, it is characterized in that: this automatic focusing mechanism further comprises a transmission gear, and this transmission gear comprises a driving gear and a follower gear, driving gear and follower gear engagement; Driving gear links to each other with CD-ROM drive motor, and follower gear is sleeved on the lens barrel and drives the lens barrel motion.
2. automatic focusing mechanism as claimed in claim 1 is characterized in that: this lens mount comprises a set collar, and lens barrel is installed on the set collar.
3. automatic focusing mechanism as claimed in claim 2 is characterized in that: this set collar inwall is provided with internal thread, and lens barrel outer wall lower end is provided with external thread, this lens barrel outer wall external thread and set collar inwall screw-internal thread fit.
4. automatic focusing mechanism as claimed in claim 3 is characterized in that: this lens barrel outer wall upper end is provided with two projectioies, and this follower gear inwall upper end is provided with 2 second grooves, can cooperate with two projectioies lens barrel is positioned in the follower gear.
5. automatic focusing mechanism as claimed in claim 4 is characterized in that: this 2 second groove tools certain altitude can make two to be raised in slippage in 2 second grooves.
6. automatic focusing mechanism as claimed in claim 5 is characterized in that: this follower gear outer wall is provided with tooth bar, meshes with driving gear.
7. automatic focusing mechanism as claimed in claim 6 is characterized in that: this set collar outer wall is equipped with one first groove, buckle one bayonet unit in it.
8. automatic focusing mechanism as claimed in claim 7 is characterized in that: this bayonet unit is non-closed annulus, which is provided with a breach.
9. automatic focusing mechanism as claimed in claim 8 is characterized in that: this bayonet unit is at a plurality of balls of set collar arranged outside, and this ball is connected to set collar and can be contained in set collar inside by elastic device.
10. automatic focusing mechanism as claimed in claim 8 or 9, it is characterized in that: this follower gear inwall lower loop is provided with 2 the 3rd grooves, and is corresponding with bayonet unit, and this bayonet unit outer wall is contained in wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420102395.8U CN2784977Y (en) | 2004-12-03 | 2004-12-03 | Automatic focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420102395.8U CN2784977Y (en) | 2004-12-03 | 2004-12-03 | Automatic focusing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2784977Y true CN2784977Y (en) | 2006-05-31 |
Family
ID=36771946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200420102395.8U Expired - Lifetime CN2784977Y (en) | 2004-12-03 | 2004-12-03 | Automatic focusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2784977Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436049A (en) * | 2010-09-29 | 2012-05-02 | 深圳市锋彩科技发展有限公司 | Lens assembling device |
| CN103576415A (en) * | 2013-09-29 | 2014-02-12 | 深圳市天辅乘云科技有限公司 | Motor gear assembly for light machine focusing |
| TWI453492B (en) * | 2009-11-02 | 2014-09-21 | Hon Hai Prec Ind Co Ltd | Lens module |
| CN104635313A (en) * | 2013-11-06 | 2015-05-20 | 北京兆维电子(集团)有限责任公司 | Focusing lens and industrial camera provided with focusing lens |
| CN106054342A (en) * | 2013-12-31 | 2016-10-26 | 泉州市东南光电股份有限公司 | Self-locking video camera external focusing device with worm gear disks and worms |
| CN106802530A (en) * | 2017-02-28 | 2017-06-06 | 歌尔股份有限公司 | Focus control and camera module test device |
| CN109581610A (en) * | 2018-12-29 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | Focus adjusting mechanism |
-
2004
- 2004-12-03 CN CN200420102395.8U patent/CN2784977Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI453492B (en) * | 2009-11-02 | 2014-09-21 | Hon Hai Prec Ind Co Ltd | Lens module |
| CN102436049A (en) * | 2010-09-29 | 2012-05-02 | 深圳市锋彩科技发展有限公司 | Lens assembling device |
| CN102436049B (en) * | 2010-09-29 | 2013-11-06 | 深圳市锋彩科技发展有限公司 | Lens assembling device |
| CN103576415A (en) * | 2013-09-29 | 2014-02-12 | 深圳市天辅乘云科技有限公司 | Motor gear assembly for light machine focusing |
| CN104635313A (en) * | 2013-11-06 | 2015-05-20 | 北京兆维电子(集团)有限责任公司 | Focusing lens and industrial camera provided with focusing lens |
| CN106054342A (en) * | 2013-12-31 | 2016-10-26 | 泉州市东南光电股份有限公司 | Self-locking video camera external focusing device with worm gear disks and worms |
| CN106054342B (en) * | 2013-12-31 | 2018-09-28 | 泉州市东南光电股份有限公司 | Self-locking video camera external focusing device with worm gear disk and worm screw |
| CN106802530A (en) * | 2017-02-28 | 2017-06-06 | 歌尔股份有限公司 | Focus control and camera module test device |
| CN106802530B (en) * | 2017-02-28 | 2019-04-30 | 歌尔股份有限公司 | Focus control and camera module test device |
| CN109581610A (en) * | 2018-12-29 | 2019-04-05 | 中国科学院长春光学精密机械与物理研究所 | Focus adjusting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141203 Granted publication date: 20060531 |