CN107422574A - A kind of automatic lens cover structure of heavy caliber camera lens - Google Patents
A kind of automatic lens cover structure of heavy caliber camera lens Download PDFInfo
- Publication number
- CN107422574A CN107422574A CN201710771020.2A CN201710771020A CN107422574A CN 107422574 A CN107422574 A CN 107422574A CN 201710771020 A CN201710771020 A CN 201710771020A CN 107422574 A CN107422574 A CN 107422574A
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- lens
- lens cap
- cap
- lever
- motor
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/043—Protective lens closures or lens caps built into cameras
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a kind of automatic lens cover structure of heavy caliber camera lens, this lens hood structure uses quadric chain, lens cap is into two pieces, there are a pair of quadric chains on every, there is a driving lever in every group of quadric chain --- band motor, one follower lever is rotated around fixing axle, and two motors during driving on every lens cap need stringent synchronization.The structure is applied to heavy caliber camera lens, and lens cap is opened and the radius of gyration of closure is small, and lens cap is opened and the gravity center shift of closure is small.
Description
Technical field
The present invention relates to the technical field of automatic lens cover structure, more particularly to a kind of automatic lens cover of heavy caliber camera lens
Structure.
Background technology
The optical lens of currently designed production, it is most of be all equipped be hand lens cap, only seldom some are small
Camera lens is just equipped with automatic lens cover, and heavy caliber camera lens is due to the limitation of lens cap volume and weight, and lens cap is to camera lens
The influence of counterweight, it even more can seldom match somebody with somebody automatic lens cover.
The optics bore for being related to project is 1m, it is necessary to which equipment has the ability of remote control, it is necessary to designs automatic lens cover.Will
The unlatching of automatic lens cover, closure change is asked to produce big influence to the position of centre of gravity of camera lens.
The content of the invention
The technical problem to be solved in the present invention is：A kind of overcome the deficiencies in the prior art, there is provided novel automatic lens cover
Structure, the heavy caliber camera lens automatic lens cover that the structure is realized have：It is simple in construction, rotate flexibly, the radius of gyration is small, center of gravity becomes
Change the features such as small, meet the use of project.
The present invention solve the technical scheme that uses of above-mentioned technical problem for：A kind of automatic lens cover knot of heavy caliber camera lens
Structure, the structure include preceding lens barrel group, electromagnet, cone, lens cap, iron block, follower lever, threaded pin, motor, master
Lever and fixed seat, lens cap are divided into left and right two panels, and the realization of every motion all needs have an electromagnet, a lens cap
Piece, an iron block, two pieces follower lever, six threaded pins, two pieces motor, two pieces driving lever, utilize quadric chain
The support and driving of lens cap are realized, a bar of the camera lens cover plate as quadric chain, driving lever is as with motor
Motion bar, follower lever is as another motion bar, and electromagnet is used for after lens cap is opened completely, and electromagnet power-up holds camera lens
The iron block covered；The left and right two panels folding of lens cap is to realize the opening and closing of camera lens；To make lens cap light, lens cap makes
Material is LY11, and electromagnet can not attract LY11, and one piece of iron block is fixed on lens cap to ensure that magnet can be by lens cap
Attract；The connecting hole at follower lever both ends is all unthreaded hole, still can there is relative rotation after assembling；Threaded pin both can be with
Pin is fixed by screw thread, and can rotates the follower lever of connection or driving lever；Motor realizes that the autonomous of lens cap is opened
Open and close；Driving lever transmits the rotation of motor；
The structure also includes preceding lens barrel group, cone and fixed seat, and the support of every lens cap has two sets of double leval jib machines
Structure, often covering quadric chain has a follower lever, three threaded pins, a motor, driving lever, a fixed seat,
Wherein between follower lever and lens cap and fixed seat with threaded pin connect, guarantee can relatively rotate each other, driving lever and
Also connected between lens cap with threaded pin, guarantee can relatively rotate between the two.Preceding lens barrel group is used to support fixed prime mirror
The pedestal of head, cone and electromagnet are each attached on this part；Cone main function is to prevent the veiling glare in non-visual field from entering
Enter optical system, need fixed seat to be arranged on cone herein；Fixed seat is locked by the position of driving lever and follower lever, only protects
Card driving lever and follower lever can rotate.
Every lens cap is supported by two sets of quadric chains, when lens cap needs to be turned on and off, with a piece of lens cap
On two sets of quadric chains need simultaneously do identical action, this requires two sets of quadric chains being connected with lens cap
Motor works asynchronously, and two motor rotation directions are opposite.
Open and close in place, it is necessary to arrange corresponding sensors in place in lens cap, fully opened in place in lens cap
Afterwards, the iron block on aluminum lens cap is held with electromagnet, ensure lens cap stabilization is parked in open position.
The principle of the present invention is：A kind of novel heavy caliber automatic lens lid mechanism, lens cap are divided into two panels, per a piece of
On there are two sets of quadric chains to support, realize the opening and closing of lens cap by driving the driving shaft of quadric chain.
First, the structure of a set of quadric chain, wherein active edges of the lens cap as quadric chain are devised, actively
Bar and follower lever support lens cap, and when four support bars produce rotation, lens cap can be moved to different positions.It is driven
Band spiral shell is used in fixed edge of the fixed seat of bar and driving lever as quadric chain, follower lever and the connection of lens cap and fixed seat
Line pin connects, and follower lever is rotary, and the connection of driving lever and lens cap is also connected with threaded pin, driving lever
The other end be connected as being fixedly connected with drive motor shaft, driving lever and drive motor shaft are synchronous rotaries.
Secondly, the fixed seat of 4 groups of four liang of linkages is fixed on same part --- the correct position of cone, adjustment
Quadric chain enables lens cap to cover cone open front, and the correct position of lens barrel, will be passed before electromagnet is installed to
Sensor mounting and adjusting in place, can be with powered-down machine, when lens cap opens limit signal when limit signal is effective when lens cap is closed
When effective, electromagnet is powered up, motor power-off.
3rd, to ensure that every lens cap can be moved normally, two on every lens cap motor is necessary
Synchronous axial system, and the rotation direction of two motors is on the contrary, ensure that every lens cap can normal movement；Lens cap and master simultaneously
The connection of lever and follower lever uses threaded pin, ensures can there is relative turn between lens cap and driving lever, follower lever
It is dynamic, and the connection of follower lever and fixed seat is also to use threaded pin, can also have between follower lever and fixed seat and quite turn
Dynamic, one end of driving lever and the rotating shaft of motor are fixed as one, and ensure that the output angle of rotation of motor can be by actively
Bar completely embodies.
For heavy caliber camera lens because equipment volume is big, the opening and closing of lens cap are very bothersome if being realized with manpower,
It is necessary using automatic lens cover on heavy caliber camera lens, the lens cap of quadric chain of the present invention, which has, to be opened
When the radius of gyration it is small, the features such as small, is influenceed on the center of gravity of camera lens, is a kind of to realize heavy caliber camera lens automatic lens cover well
Method.
Present most of camera lens, all without design automatic lens cover, in general is all to design a circular lid, employment
The manual mode of work is covered and removed.
Its lens cap of small-bore camera lens is general relatively light, and the counterweight influence that lens cap covered and removed on whole camera lens is not
It is very big, but after camera lens aperture is to certain size, lens cap on the lid of lens cap and removes meeting to camera lens with regard to heavier
Counterweight produces large effect.
The 1m bores automatic lens cover of design uses the structure type of quadric chain, ensure that lens cap is being opened and closed
Its radius of gyration is sufficiently small during conjunction, multiple spot (half of lens cap 4 points support) supporting construction ensure that lens cap do enough to
Deform small under conditions of light, the gravity center shift of lens cap is little when the center of gravity and closure of lens cap during unlatching, ensure that whole mirror
The center of gravity of head offsets small in both cases.
What quadric chain make it that lens cap does is translation, rather than is rotated, so that during lens cap closure or openness
The radius of gyration is small, simultaneously because lens cap is a semicircle, big end is in the front of lens barrel during opening, so the gravity motion of lens cap
Measure small, so the center of gravity of camera lens whole group is just influenceed small；Mitigate the weight of lens cap using the multi-point support of quadric chain,
Realize that the driving to lens cap reduces the output torque requirement of single motor, such design using paired motor
To install automatic lens cover additional on heavy caliber camera lens.
The present invention compared with prior art the advantages of be：
(1) overcome the deficiencies in the prior art of the present invention, there is provided a kind of novel automatic lens cover structure, there is remote control
Ability and it is simple in construction, rotate it is flexible.
(2) present invention is solved because heavy caliber lens apparatus volume is big, and the opening and closing of lens cap are difficult artificially reality
Existing puzzlement.The optical lens of currently designed production, it is most of be all equipped be hand lens cap, only seldom some are small
Camera lens is just equipped with automatic lens cover, and heavy caliber camera lens even more can seldom be matched somebody with somebody automatic due to the limitation of lens cap volume and weight
Lens cap.
(3) present invention, avoiding after camera lens aperture is to certain size, lens cap is heavier, on the lid of lens cap and removes
Can be to considerable influence caused by the counterweight of camera lens.Small-bore camera lens its lens cap is general relatively light, and lens cap is covered and removed pair
The counterweight of whole camera lens influences not being very big, the lens cap of quadric chain of the present invention, although lens cap size is larger
But with the characteristics of radius of gyration is small when opening, but the center of gravity of camera lens is influenceed small.
Brief description of the drawings
Fig. 1 is the heavy caliber automatic lens cover half section installation diagram of the present invention；
Fig. 2 is the fixed seat structure figure of the present invention；
Fig. 3 is the driving lever structure chart of the present invention；
Fig. 4 is the follower lever structure chart of the present invention；
Fig. 5 is the threaded pin pin structure figure of the present invention.
Reference implication is in figure：1 is preceding lens barrel group, and 2 be electromagnet, and 3 be cone, and 4 be lens cap, and 5 be iron block,
6 be follower lever, and 7 be threaded pin, and 8 be motor, and 9 be driving lever, and 10 be fixed seat, and 11 be fixed seat connecting hole, 12
For motor fixing hole, 13 be driven lever attachment hole, 14 be with motor shaft connecting hole, 15 be to be with lens cap connecting hole, 16
Unthreaded hole is connected, 17 be six square toes, and 18 be polished rod, and 19 be connection screw thread.
Embodiment
Below in conjunction with the accompanying drawings and embodiment further illustrates the present invention.
What the present invention discussed is a kind of automatic lens cover structure of heavy caliber camera lens, and generally, camera lens front end has
Preceding lens barrel group 1 and cone 3 the two parts, are directly in the monoblock dome of 3 drive end bearing bracket of cone one, this circle in most cases
The weight of lid is often very heavy, and the counterweight of camera lens is had a great influence.
The present invention realizes the automatic lens cover requirement of heavy caliber camera lens by a kind of quadric chain, and avoiding is needing
The trouble of two people's manual cover lens caps is needed when closing camera lens.
As shown in Fig. 1 the installation diagram diagram when automatic lens cover of 1m levels camera lens is opened, left side one side of something lid is
It is fully open, and the right one side of something lid show and just opens half.
First to realize that automatic lens cover needs the lid of a full circle being bisected into two halves, so can effectively mitigate to sky
Between and structure pressure；
Secondly, a set of quadric chain is devised, the active edges using lens cap as quadric chain, devises one admittedly
Reservation is used as one side of quadric chain, so that quadric chain only has a side to be provided with translation function, this side
It is exactly the side that lens cap is connected into；
3rd, as driving lever when rotating big one of the rotational angle in by two of quadric chain, in addition on one side
Follower lever is made, adds motor to realize the autonomous rotation of quadric chain on driving lever；
4th, judge whether lens cap moves in place by adding sensors in place, while open completely in lens cap
Shi Tianjia electromagnet carrys out fixed mirror skull, in case lens cap arbitrarily rotates when camera lens works.
As shown in figure 1, a kind of automatic lens cover structure of heavy caliber camera lens of the present invention, including：Preceding lens barrel group 1, for propping up
Before the pedestal of the fixed prime camera lens of support, cone 3 and electromagnet 2 are each attached in lens barrel group 1；Electromagnet 2, when lens cap is complete
After opening, electromagnet power-up holds the iron block on lens cap；Cone 3, main function are to prevent the veiling glare in non-visual field from entering
Enter optical system, need fixed seat to be arranged on cone 3 herein；Lens cap 4, lens cap 4 are divided into two, and have made two and half
Circle, into a positive round during closure；Iron block 5, to make lens cap 4 light, the material that lens cap 4 uses is LY11, and electromagnet 2 can not be inhaled
Draw LY11, one piece of iron block 5 is fixed on lens cap 4 to ensure that electromagnet 2 can attract lens cap 4；Follower lever 6, follower lever 6
The connecting hole at both ends is all unthreaded hole, still can there is relative rotation after assembling；Threaded pin 7, it can both be incited somebody to action by screw thread
Pin is fixed, and and can rotates the follower lever 6 of connection or driving lever 9；Motor 8, motor 8 realize oneself of lens cap 4
Main opening and closing；Driving lever 9, transmit the rotation of motor 8；Fixed seat 10, the position of driving lever 9 and follower lever 6 is locked
Extremely, a guarantee driving lever 9 and follower lever 6 can rotate.
Fig. 2 is the fixed seat structure figure of the present invention, and 11 be fixed seat connecting hole, and fixed seat 10 passes through fixed seat connecting hole 11
It is fixedly mounted on cone 3；12 be motor fixing hole, and motor 8 is fixedly mounted by motor fixing hole 12
In fixed seat 10；13 be driven lever attachment hole, and it is the installation fixed hole position of threaded pin 7, so as to ensure follower lever spirit
It is living to rotate.
Fig. 3 is the driving lever structure chart of the present invention, and 14 be to be exported with motor shaft connecting hole, driving lever 9 by itself and motor
Axle is fixedly connected, so as to realize the motion of whole mechanism；15 be with the connecting hole of lens cap 4, between its polished rod with threaded pin 7
Gap coordinates, and cylindricity and surface roughness need to meet corresponding requirements, so as to ensure driving lever around the threaded flexible rotating of pin 7.
Fig. 4 is the follower lever structure chart of the present invention, and 16 be connection unthreaded hole, and the polished rod gap of itself and threaded pin 7 coordinates,
Cylindricity and surface roughness need to meet corresponding requirements, so as to ensure follower lever around the threaded flexible rotating of pin 7.
Fig. 5 is the threaded pin pin structure figure of the present invention, and 17 be six square toes, is easy to the threaded installation of pin 7 to fix；18 are
Polished rod, by its realize threaded pin nail 7 with the connecting hole 15 of lens cap 4, be connected the gap cooperation of unthreaded hole 16, cylindricity and surface
Roughness need to meet corresponding requirements, ensure that whole mechanism is gone to flexibly.19 be connection screw thread, and the threaded installation of pin 7 is fixed to be used
Screw thread.
Claims (4)
- A kind of 1. automatic lens cover structure of heavy caliber camera lens, it is characterised in that：The structure includes preceding lens barrel group (1), electromagnet (2), cone (3), lens cap (4), iron block (5), follower lever (6), threaded pin (7), motor (8), driving lever (9) With fixed seat (10), lens cap (4) is divided into left and right two panels, and the realization of every motion all needs have an electromagnet (2), a mirror Skull piece, an iron block (5), two pieces follower lever (6), six threaded pins (7), two pieces motor (8), two pieces driving lever (9) support and driving of lens cap (4), a bar of the camera lens cover plate as quadric chain, master, are realized using quadric chain For lever (9) as the motion bar with motor (8), follower lever (6) is used as another motion bar, and electromagnet (2) is used to work as mirror After skull (4) is opened completely, electromagnet power-up holds the iron block (5) on lens cap (4)；The left and right two panels folding of lens cap (4) Realize the opening and closing of camera lens；For iron block (5) to make lens cap (4) gently, the material that lens cap (4) uses is LY11, electricity Magnet can not attract LY11, and one piece of iron block is fixed on lens cap (4) to ensure that magnet can attract lens cap (4)；It is driven The connecting hole at bar (6) both ends is all unthreaded hole, still can there is relative rotation after assembling；Threaded pin (7), can both pass through Screw thread fixes pin, and and can rotates the follower lever (6) of connection or driving lever (9)；Motor (8) realizes lens cap (4) Autonomous opening and closing；Driving lever (9) transmits the rotation of motor.
- A kind of 2. automatic lens cover structure of heavy caliber camera lens according to claim 1, it is characterised in that：The structure is also wrapped Lens barrel group (1), cone (3) and fixed seat (10) before including, the support of every lens cap have two sets of quadric chains, often cover four Linkage has a follower lever (6), three threaded pins (7), a motor (8), a driving lever (9), fixation Seat (10), wherein follower lever (6) are connected between lens cap (4) and fixed seat (10) with threaded pin (7), are ensured mutual It can relatively rotate, be also connected between driving lever (9) and lens cap (4) with threaded pin (7), ensure relative to turn between the two Dynamic, preceding lens barrel group (1) is used for the pedestal for supporting fixed prime camera lens, lens barrel group before cone (3) and electromagnet (2) are each attached to (1) on；Cone (3) main function is to prevent the veiling glare in non-visual field from entering optical system, needs fixed seat (10) herein On cone (3)；Fixed seat (10) is locked by the position of driving lever (9) and follower lever (6), a guarantee driving lever (9) It can be rotated with follower lever (6).
- A kind of 3. automatic lens cover structure of heavy caliber camera lens according to claim 2, it is characterised in that：Every lens cap (4) supported by two sets of quadric chains, when lens cap (4) needs to be turned on and off, with two set four on a piece of lens cap (4) Linkage needs to do identical action simultaneously, and this requires the driving electricity for two sets of quadric chains being connected with lens cap (4) Machine (8) works asynchronously, and two motor (8) rotation directions are opposite.
- A kind of 4. automatic lens cover structure of heavy caliber camera lens according to any one of claims 1 to 3, it is characterised in that： Opened and closed in place in lens cap (4), it is necessary to arrange corresponding sensors in place, after lens cap (4) fully opens in place, The iron block (5) on the lens cap (4) of aluminum is held with electromagnet (2), ensure lens cap (4) stabilization is parked in open position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771020.2A CN107422574B (en) | 2017-08-31 | 2017-08-31 | A kind of automatic lens cover structure of heavy caliber camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771020.2A CN107422574B (en) | 2017-08-31 | 2017-08-31 | A kind of automatic lens cover structure of heavy caliber camera lens |
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| Publication Number | Publication Date |
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| CN107422574A true CN107422574A (en) | 2017-12-01 |
| CN107422574B CN107422574B (en) | 2019-11-12 |
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| CN201710771020.2A Active CN107422574B (en) | 2017-08-31 | 2017-08-31 | A kind of automatic lens cover structure of heavy caliber camera lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158203A (en) * | 2020-01-21 | 2020-05-15 | 中国科学院西安光学精密机械研究所 | Electric lens cover device with self-balancing function and balancing method thereof |
| CN111505788A (en) * | 2020-04-17 | 2020-08-07 | 中国电子科技集团公司第五十三研究所 | Automatic lens cover |
| CN115494600A (en) * | 2022-10-19 | 2022-12-20 | 北京瑞控信科技股份有限公司 | Optical window electric protection device based on connecting rod structure and working method thereof |
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| JP2011033818A (en) * | 2009-07-31 | 2011-02-17 | Nikon Corp | Barrier unit, lens barrel and camera |
| CN102662232A (en) * | 2012-03-09 | 2012-09-12 | 中国科学院长春光学精密机械与物理研究所 | Novel power-driven protective cover for primary mirror of large aperture telescope |
| TW201426154A (en) * | 2012-12-26 | 2014-07-01 | Hon Hai Prec Ind Co Ltd | Shelter structure of the image lens |
| GB2520707A (en) * | 2013-11-28 | 2015-06-03 | Chung Jen Chang | Lens cap |
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| JP2001194703A (en) * | 1999-10-29 | 2001-07-19 | Kyocera Corp | Barrier opening/closing controller |
| CN100476565C (en) * | 2003-06-24 | 2009-04-08 | 索尼株式会社 | Lens hood and imaging device |
| JP2011033818A (en) * | 2009-07-31 | 2011-02-17 | Nikon Corp | Barrier unit, lens barrel and camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111158203A (en) * | 2020-01-21 | 2020-05-15 | 中国科学院西安光学精密机械研究所 | Electric lens cover device with self-balancing function and balancing method thereof |
| CN111505788A (en) * | 2020-04-17 | 2020-08-07 | 中国电子科技集团公司第五十三研究所 | Automatic lens cover |
| CN115494600A (en) * | 2022-10-19 | 2022-12-20 | 北京瑞控信科技股份有限公司 | Optical window electric protection device based on connecting rod structure and working method thereof |
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| Publication number | Publication date |
|---|---|
| CN107422574B (en) | 2019-11-12 |
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