CN108873574B - Automatic lens protection device and projector using same - Google Patents
Automatic lens protection device and projector using same Download PDFInfo
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- CN108873574B CN108873574B CN201810671236.6A CN201810671236A CN108873574B CN 108873574 B CN108873574 B CN 108873574B CN 201810671236 A CN201810671236 A CN 201810671236A CN 108873574 B CN108873574 B CN 108873574B
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- lens
- link
- connecting rod
- electromagnetic switch
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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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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Abstract
The invention provides an automatic lens protection device and a projector using the same. The automatic lens protection device comprises a track, an elastic element, a lens baffle, a driving connecting rod and an electromagnetic switch; one end of the driving connecting rod is connected with the lens baffle, when the lens starts to work, the electromagnetic switch is electrified to generate suction, the other end of the driving connecting rod is in magnetic contact with the electromagnetic switch, one end of the driving connecting rod pushes the lens baffle towards the first direction, the lens baffle moves along the track and enables the elastic element to deform, and the lens hole is exposed out of the lens in the shell; when the lens stops working, the electromagnetic switch is powered off to generate no suction force, the other end of the driving connecting rod is separated from the electromagnetic switch, the lens baffle moves towards the second direction along the track under the action of the elastic restoring force of the elastic element, and the lens hole is covered by the lens baffle to protect the lens in the shell. The invention can automatically start the protection function of the lens, is integrated in a machine table and cannot be lost, and is not easy to operate by mistake.
Description
Technical Field
The invention relates to the field of lens protection devices, in particular to an automatic lens protection device and a projector using the same.
Background
At present, in a projection display device or an imaging device, optical imaging must be completed by a lens, and if the surface of the lens is scratched or stained with dust, an image projected or captured by the lens is blurred. Therefore, in such electronic devices, it is necessary to keep the lens clean and prevent external dust from adhering to the surface of the lens.
The lens protection covers adopted in the prior art mainly have the following two forms: the first method is to take a traditional projector as a main use scene, a projection opening of the projector is provided with a thread or a buckle structure, a lens protection cover is provided with a corresponding thread or a buckle structure, when the projector is used, the lens protection cover is taken down from the projection opening, and when the projector is not used, the lens protection cover covers the projection opening; the second one uses traditional card camera as main application scene, the lens protective cover is connected with some kind of driving part, when needing to use the camera, the driving part is driven to operate, drives the lens protective cover to open automatically at the same time, when not using the camera, drives the lens protective cover to close automatically.
However, the first lens protection cover needs to be manually operated and cannot be automatically opened when the projector starts to operate or automatically closed when the projector stops operating, while the second lens protection cover can be automatically opened and closed, but the conventional driving part has a complicated structure, which increases the manufacturing cost of the entire lens protection device.
Disclosure of Invention
In view of the above technical problems, the present invention provides an automatic lens protection device that can automatically turn on a lens protection function in an inoperative state and has a simple structure, and a projector using the same.
The invention relates to an automatic lens protection device, which is used for protecting a lens arranged in a shell, wherein the shell is provided with a lens hole corresponding to the lens; the automatic lens protection device comprises a track, an elastic element, a lens baffle, a driving connecting rod and an electromagnetic switch, wherein the track, the elastic element, the lens baffle, the driving connecting rod and the electromagnetic switch are arranged in the shell; the track is arranged adjacent to the lens hole; the elastic element is used for providing elastic restoring force for the lens baffle along the extending direction of the track; the lens baffle is movably arranged on the track; the driving connecting rod is arranged on the inner side of the shell through a rotating shaft, and one end of the driving connecting rod is connected to the lens baffle; the electromagnetic switch is arranged on the inner side of the shell, and the other end of the driving connecting rod is connected to the electromagnetic switch in an openable manner; when the lens starts to work, the electromagnetic switch is electrified to generate suction, the other end of the driving connecting rod is in magnetic contact with the electromagnetic switch, one end of the driving connecting rod drives the lens baffle plate towards a first direction, the lens baffle plate moves along the track and enables the elastic element to deform, and the lens hole completely exposes the lens in the shell; when the lens stops working, the electromagnetic switch is powered off to generate no suction force, the other end of the driving connecting rod is separated from the electromagnetic switch, the lens baffle moves along the track towards a second direction opposite to the first direction under the action of the elastic restoring force of the elastic element, one end of the driving connecting rod moves towards the second direction along with the lens baffle, and the lens hole is completely covered by the lens baffle to protect the lens in the shell.
Preferably, the driving link includes a first link and a second link hinged to each other, the first link and the second link are both parallel to the plane of the lens hole, the free end of the first link is connected to the lens barrier, the hinged end of the first link is connected to the hinged end of the second link, the second link is disposed through the rotating shaft, and the free end of the second link corresponds to the electromagnetic switch; the projection of the first connecting rod and the projection of the track on the plane where the lens hole is located are both located outside the range where the lens hole is located.
Further, when the lens starts to work, the free end of the second connecting rod is in magnetic contact with the electromagnetic switch, and the second connecting rod rotates around the rotating shaft and drives the free end of the first connecting rod to move towards the first direction. When the lens stops working, the free end of the second connecting rod is separated from the electromagnetic switch, the free end of the first connecting rod moves towards the second direction along with the lens baffle and drives the second connecting rod to rotate around the rotating shaft, and the free end of the second connecting rod is kept at a position separated from the electromagnetic switch.
Or further, the automatic lens protection device further comprises a first support and a second support, the first support and the second support are respectively and fixedly arranged on the inner side of the casing, the track is arranged between the first support and the second support, and the first connecting rod penetrates through the second support; when the lens starts to work, the second connecting rod rotates around the rotating shaft and drives the free end of the first connecting rod to move towards the direction of the first support, and when the lens stops working, the free end of the first connecting rod moves towards the direction of the second support along with the lens baffle and drives the second connecting rod to rotate around the rotating shaft.
Furthermore, one end of the elastic element is adjacent to the first bracket or the second bracket, and the other end of the elastic element is contacted with the lens baffle; when the lens barrier moves towards the first direction, the elastic element provides elastic resistance to the lens barrier towards the second direction, and when the lens barrier moves towards the second direction, the elastic element provides elastic restoring force to the lens barrier towards the second direction.
Further, the extending direction of the first link is parallel to the extending direction of the rail.
Preferably, the rail is a cross bar erected inside the housing and parallel to the plane of the lens hole, and the lens barrier is slidably disposed on the cross bar.
Further, the elastic element is a spring sleeved on the cross rod.
Preferably, the driving connecting rod is a magnetic metal connecting rod; or the other end of the driving connecting rod is provided with a metal structure which can be magnetically attracted with the electromagnetic switch.
The invention also provides a projector which comprises the automatic lens protection device.
Compared with the prior art, the automatic lens protection device can effectively protect the lens, can automatically start the protection function when the projector does not work, has simple structure and low manufacturing cost, can not be lost when being integrated in a projector table, and can not cause the problem of melting of a lens cover due to misoperation.
Drawings
Fig. 1 is a schematic structural diagram of an automatic lens protection device according to an embodiment of the present invention when an electromagnetic switch is powered off.
Fig. 2 is a schematic structural diagram of an automatic lens protection apparatus according to an embodiment of the present invention when an electromagnetic switch is turned on.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a schematic structural diagram of an automatic lens protection device according to an embodiment of the present invention when an electromagnetic switch is powered off, and fig. 2 is a schematic structural diagram of the automatic lens protection device according to an embodiment of the present invention when the electromagnetic switch is powered on. The automatic lens protection apparatus 100 is used to protect a lens 300 disposed in a housing 200, and the housing 200 is provided with a lens hole 400 corresponding to the lens 300.
The automatic lens protection apparatus 100 includes a rail 3, an elastic member 4, a lens barrier 5, a driving link 6, and an electromagnetic switch 7, which are disposed in a housing 200. The rail 3 is disposed adjacent to the lens hole 400. The elastic member 4 is used to provide an elastic restoring force to the lens barrier 5 along the extending direction of the rail 3. The lens barrier 5 is movably mounted on the rail 3. The driving connecting rod 6 is installed inside the casing 200 through a rotating shaft 60, and one end 61 of the driving connecting rod 6 is connected to the lens barrier 5; the electromagnetic switch 7 is disposed inside the housing 200, and the other end 62 of the driving link 6 is openably and closably connected to the electromagnetic switch 7.
When the lens 300 starts to work, the electromagnetic switch 7 is powered on to generate attraction, the other end 62 of the driving connecting rod 6 is in magnetic contact with the electromagnetic switch 7, one end 61 of the driving connecting rod 6 drives the lens baffle 5 towards the first direction X1, the lens baffle 5 moves along the track 3 and deforms the elastic element 4, and the lens hole 400 completely exposes the lens 300 in the housing 200; when the lens 300 stops working, the electromagnetic switch 7 is powered off to generate no suction force, the other end 62 of the driving link 6 is separated from the electromagnetic switch 7, the lens barrier 5 moves along the rail 3 in the second direction X2 opposite to the first direction X1 under the elastic restoring force of the elastic element 4, the one end 61 of the driving link 6 moves in the second direction X2 accordingly, and the lens hole 400 is completely covered by the lens barrier 5 to protect the lens 300 in the housing 200.
In various embodiments of the present invention, the driving link 6 may include a first link 63 and a second link 64 hinged to each other, the first link 63 and the second link 64 are both parallel to the plane of the lens hole 400, a free end of the first link 63 (corresponding to the one end 61 of the driving link 6) is connected to the lens barrier 5, a hinged end of the first link 63 is connected to a hinged end of the second link 64, the second link 64 is disposed through the rotating shaft 60, and a free end of the second link 64 (corresponding to the other end 62 of the driving link 6) corresponds to the electromagnetic switch 7. The projection of the first link 63 and the track 3 on the plane of the lens hole 400 is located outside the range of the lens hole 400, i.e. neither the first link 63 nor the track 3 is aligned between the lens hole 400 and the lens 300, so as to ensure that the first link 63 and the track 3 do not affect the light emitted by the lens 300. For example, the first link 63 and the rail 3 are respectively located on the upper side of the lens hole 400. Including, but not limited to, the extending direction of the first link 63 may be parallel to the extending direction of the rail 3.
In practical applications, when the lens 300 starts to work, the free end 62 of the second link 64 magnetically contacts the electromagnetic switch 7, and the second link 64 rotates around the rotating shaft 60 and drives the free end 61 of the first link 63 to move in the first direction X1; when the lens 300 stops operating, the free end 62 of the second link 64 is separated from the electromagnetic switch 7, the free end 61 of the first link 63 moves along with the lens barrier 5 in the second direction X2 and drives the second link 64 to rotate around the rotating shaft 60, and the free end 62 of the second link 64 is maintained at a position separated from the electromagnetic switch 7. Preferably, in the moving process, the lens barrier 5 is always located between the lens 300 and the sidewall of the case 200 on which the lens hole 400 is located; in other words, the lens barrier 5 is always parallel to the plane of the lens hole 400.
In different embodiments of the present invention, the automatic lens protection device 100 may further include a first bracket 1 and a second bracket 2, the first bracket 1 and the second bracket 2 are respectively and fixedly disposed inside the housing 200, and the rail 3 is disposed between the first bracket 1 and the second bracket 2. Preferably, the rail 3 is fixed to the first bracket 1 and the second bracket 2.
Including but not limited to, the first link 63 can be inserted into the second frame 2, and the second frame 2 can support the first link 63 without affecting the sliding of the first link 63, so that the free end 61 of the first link 63 can move smoothly along the first direction X1 or the second direction X2. During the translation of the first link 63, the second link 64 hinged to the first link 63 can slightly move up and down relative to the rotating shaft 60 as long as the rotation of the second link 64 about the rotating shaft 60 is not affected.
When the lens 300 starts to work, the second link 64 rotates around the rotating shaft 60 and drives the free end 61 of the first link 63 to move towards the first bracket 1, and when the lens 300 stops working, the free end 61 of the first link 63 moves with the lens barrier 5 towards the second bracket 2 and drives the second link 64 to rotate around the rotating shaft 60. Including but not limited to, the lens hole 400 is located between the first bracket 1 and the second bracket 2, and the lens hole 400 is adjacently disposed to the second bracket 2.
Preferably, one end 41 of the elastic element 4 is adjacent to the first bracket 1, that is, the elastic element 4 is disposed between the first bracket 1 and the lens barrier 5, and the other end 42 of the elastic element 4 is in contact with the lens barrier 5; when the lens barrier 5 moves in the first direction X1, the elastic element 4 provides elastic resistance to the lens barrier 5 in the second direction X2, i.e., the elastic element 4 is compressed; when the lens barrier 5 moves in the second direction X2, the elastic member 4 provides an elastic restoring force to the lens barrier 5 in the second direction X2, that is, the elastic member 4 provides a pushing force to the lens barrier 5. The elastic force provided by the elastic element 4 includes both the resultant elastic force of the elastic element 4 and the elastic component of the elastic element 4, in other words, the elastic element 4 only needs to have an elastic force along the extending direction of the track 3 (i.e. the first direction X1 or the second direction X2), and the present embodiment does not limit the installation direction of the elastic element 4 itself.
It should be noted that one end of the elastic element 4 may also be adjacent to the second bracket 2 (not shown in this embodiment), that is, the elastic element 4 is disposed between the second bracket 2 and the lens barrier 5, and the other end of the elastic element 4 contacts the lens barrier 5; when the lens barrier 5 moves in the first direction X1, the elastic element 4 provides elastic resistance to the lens barrier 5 in the second direction X2, that is, the elastic element 4 is stretched; when the lens barrier 5 moves in the second direction X2, the elastic element 4 provides an elastic restoring force to the lens barrier 5 in the second direction X2, that is, the elastic element 4 provides a pulling force to the lens barrier 5.
Preferably, the rail 3 is a cross bar erected inside the chassis 200 and parallel to the plane of the lens hole 400, and the lens barrier 5 is slidably disposed on the cross bar. In practical applications, the elastic element 4 may be a spring sleeved on the cross bar, but the invention is not limited thereto.
In various embodiments of the present invention, the lens barrier 5 has a first side 51 opposite to the first bracket 1 and a second side 52 opposite to the second bracket 2, one end 41 of the elastic element 4 can abut against the first bracket 1, and the other end 42 of the elastic element 4 abuts against the first side 51. Preferably, one end 61 of the driving link 6 is connected to the second side 52 of the lens barrier 5 through the second bracket 2.
In practical applications, the free end of the second connecting rod 64 has a metal structure 641, such as a bent structure, capable of being magnetically attracted with the electromagnetic switch 7, so as to further improve the firmness of the absorption and fixation on the premise of ensuring the magnetic attraction.
It should be noted that the driving link 6 may be made of a magnetic material as a whole, only the second link 64 may be made of a magnetic material, or only the free end of the second link 64 may be made of a magnetic material, which is not limited in the present invention.
In the above embodiments of the present invention, the operation principle is summarized as follows.
Taking the projector as an example, when the projector is turned on and the lens 300 needs to start working, the electromagnetic switch 7 is controlled to be powered on to generate attraction, the other end 62 of the driving connecting rod 6 is magnetically contacted with the electromagnetic switch 7, one end 61 of the driving connecting rod 6 drives the lens baffle 5 towards the first direction X1, the lens baffle 5 moves along the track 3 and deforms the elastic element 4, and at this time, the lens hole 400 is completely exposed out of the lens 300 in the housing 200; and the lens barrier 5 on the rail 3 can be maintained at the position of exposing the lens hole 400 due to the magnetic attraction and fixation of the driving link 6.
When the projector is turned off or enters a working mode in which no projection is needed and the lens 300 stops working, the electromagnetic switch 7 is controlled to be powered off and does not generate suction force, the other end 62 of the driving link 6 is separated from the electromagnetic switch 7, the lens baffle 5 moves along the track 3 in a second direction X2 opposite to the first direction X1 under the action of the elastic restoring force of the deformed elastic element 4, the one end 61 of the driving link 6 moves along with the second direction X2, and at the moment, the lens hole 400 is completely covered by the lens baffle 5 to protect the lens 300 in the housing 200; and the lens baffle 5 on the track 3 can be maintained at the position of completely covering the lens hole 400 because of the elastic force of the elastic element.
The invention provides a projector which comprises the automatic lens protection device 100 in the embodiments. After a projector power supply or a host power supply is turned on, the electromagnetic switch attracts the driving connecting rod, the driving connecting rod pushes the lens baffle to move along the sliding rail, and the spring is compressed or stretched, so that the projection lens is exposed; after the power supply is turned off, the electromagnetic switch loosens the driving connecting rod, the spring pushes or pulls the lens baffle to return to the original position, and the projection lens is shielded.
The automatic lens protection device can effectively protect the lens, can automatically start the protection function when the projector does not work, has simple structure and low manufacturing cost, is integrated in a projector table and cannot be lost, and the problem of melting of a lens cover caused by misoperation cannot be caused. The automatic lens protector can be widely applied to various projection display devices and other instruments and equipment needing the lens protection function.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (10)
1. An automatic lens protector for protecting the lens in casing is composed of tracks, elastic element, lens baffle, drive link rod and electromagnetic switch; the track is arranged adjacent to the lens hole; the elastic element is used for providing elastic restoring force for the lens baffle along the extending direction of the track; the lens baffle is movably arranged on the track; the driving connecting rod is arranged on the inner side of the shell through a rotating shaft, and one end of the driving connecting rod is connected to the lens baffle; the electromagnetic switch is arranged on the inner side of the shell, and the other end of the driving connecting rod is connected to the electromagnetic switch in an openable manner; when the lens starts to work, the electromagnetic switch is electrified to generate suction, the other end of the driving connecting rod is in magnetic contact with the electromagnetic switch, one end of the driving connecting rod drives the lens baffle plate towards a first direction, the lens baffle plate moves along the track and enables the elastic element to deform, and the lens hole is completely exposed out of the lens in the shell; when the lens stops working, the electromagnetic switch is powered off to generate no suction force, the other end of the driving connecting rod is separated from the electromagnetic switch, the lens baffle moves along the track towards a second direction opposite to the first direction under the action of the elastic restoring force of the elastic element, one end of the driving connecting rod moves towards the second direction along with the lens baffle, and the lens hole is completely covered by the lens baffle to protect the lens in the shell.
2. The automatic lens protection device as claimed in claim 1, wherein the driving link comprises a first link and a second link hinged to each other, the first link and the second link are parallel to the plane of the lens hole, the free end of the first link is connected to the lens barrier, the hinged end of the first link is connected to the hinged end of the second link, the second link is disposed through the rotation shaft, the free end of the second link corresponds to the electromagnetic switch, and the projections of the first link and the track on the plane of the lens hole are outside the range of the lens hole.
3. The automatic lens protection device as claimed in claim 2, wherein when the lens starts to work, the free end of the second link magnetically contacts the electromagnetic switch, and the second link rotates around the rotation axis and drives the free end of the first link to move in the first direction; when the lens stops working, the free end of the second connecting rod is separated from the electromagnetic switch, the free end of the first connecting rod moves towards the second direction along with the lens baffle and drives the second connecting rod to rotate around the rotating shaft, and the free end of the second connecting rod is kept at a position separated from the electromagnetic switch.
4. The automatic lens protection device as claimed in claim 2, further comprising a first bracket and a second bracket, wherein the first bracket and the second bracket are respectively fixedly disposed inside the housing, and the rail is disposed between the first bracket and the second bracket; when the lens starts to work, the second connecting rod rotates around the rotating shaft and drives the free end of the first connecting rod to move towards the direction of the first support, and when the lens stops working, the free end of the first connecting rod moves towards the direction of the second support along with the lens baffle and drives the second connecting rod to rotate around the rotating shaft.
5. The automatic lens protection device as claimed in claim 4, wherein one end of the elastic element is adjacent to the first bracket or the second bracket, and the other end of the elastic element is in contact with the lens barrier; when the lens barrier moves towards the first direction, the elastic element provides elastic resistance to the lens barrier towards the second direction, and when the lens barrier moves towards the second direction, the elastic element provides elastic restoring force to the lens barrier towards the second direction.
6. The automatic lens protection device as claimed in claim 2, wherein the extending direction of the first link is parallel to the extending direction of the rail.
7. The automatic lens protection device as claimed in claim 1, wherein the rail is a rail mounted inside the housing and parallel to a plane of the lens hole, and the lens barrier is slidably disposed on the rail.
8. The automatic lens protection device as claimed in claim 7, wherein the elastic element is a spring sleeved on the rail.
9. The automatic lens protection device as claimed in claim 1, wherein the driving link is a magnetically attractable metal link; or the other end of the driving connecting rod is provided with a metal structure which can be magnetically attracted with the electromagnetic switch.
10. A projector characterized by comprising the lens automatic-protecting apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671236.6A CN108873574B (en) | 2018-06-26 | 2018-06-26 | Automatic lens protection device and projector using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810671236.6A CN108873574B (en) | 2018-06-26 | 2018-06-26 | Automatic lens protection device and projector using same |
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| Publication Number | Publication Date |
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| CN108873574A CN108873574A (en) | 2018-11-23 |
| CN108873574B true CN108873574B (en) | 2021-01-05 |
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| CN201810671236.6A Active CN108873574B (en) | 2018-06-26 | 2018-06-26 | Automatic lens protection device and projector using same |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290201B (en) * | 2018-12-07 | 2021-09-28 | 深圳光峰科技股份有限公司 | Projection device and cover door assembly thereof |
| CN109839100A (en) * | 2019-03-31 | 2019-06-04 | 田锦海 | It is a kind of based on the image measurer for falling self-shield and eyeglass is kept a public place clean |
| CN111103746A (en) * | 2019-12-25 | 2020-05-05 | 中国航空工业集团公司西安飞机设计研究所 | Projector catch control device |
| CN111901508B (en) * | 2020-07-03 | 2021-10-12 | 神华铁路装备有限责任公司 | Fault recognition device and movement adjusting mechanism |
| CN112019733B (en) * | 2020-09-23 | 2022-03-04 | 南昌理工学院 | Lens protection device of image digital acquisition instrument capable of being hidden |
| CN116801081A (en) | 2022-03-14 | 2023-09-22 | 英业达科技有限公司 | Image pickup structure |
| TWI794056B (en) * | 2022-03-17 | 2023-02-21 | 英業達股份有限公司 | Camera structure |
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| JP2015102784A (en) * | 2013-11-27 | 2015-06-04 | セイコーエプソン株式会社 | Projector |
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| JP4223828B2 (en) * | 2003-02-20 | 2009-02-12 | 富士フイルム株式会社 | Imaging device |
| CN100426120C (en) * | 2005-09-02 | 2008-10-15 | 亚洲光学股份有限公司 | Sliding camera protective cap device |
| CN2888488Y (en) * | 2006-01-24 | 2007-04-11 | 上海信诚至典网络技术有限公司 | A projector with cleanable lens protection cover |
| CN202475518U (en) * | 2012-03-14 | 2012-10-03 | 深圳市矽晟光电科技有限公司 | Mobile phone with camera protection structure |
| CN107577107B (en) * | 2016-07-05 | 2021-08-06 | 中兴通讯股份有限公司 | Projector shell structure and projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015102784A (en) * | 2013-11-27 | 2015-06-04 | セイコーエプソン株式会社 | Projector |
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