CN102221770B - Lens cap device and projection machine - Google Patents
Lens cap device and projection machine Download PDFInfo
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- CN102221770B CN102221770B CN 201110138859 CN201110138859A CN102221770B CN 102221770 B CN102221770 B CN 102221770B CN 201110138859 CN201110138859 CN 201110138859 CN 201110138859 A CN201110138859 A CN 201110138859A CN 102221770 B CN102221770 B CN 102221770B
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- lens cap
- projector
- sensitive film
- sheet
- metal
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Abstract
The invention discloses a lens cap device, which is applied to a projection machine and comprises a lens cap, a locating column, an elastic part, a sensitive film and a metal hook, wherein one end of the elastic part is fixed at a shell of the projection machine and the other end of the elastic part is connected with one end of the lens cap; the locating column and the sensitive film are arranged at the inner side of the lens cap; and the metal hook consists of two metal strips with different coefficients of thermal expansion, and comprises a body and a clamping part. When the projection machine is not turned on, the metal hook can be contacted with the sensitive film and the locating column can be clamped by the clamping part; and when the projection machine is turned on, the metal hook is heated and the temperature of the metal hook is raised, then the metal hook bends towards the metal strip with smaller coefficient of thermal expansion, and the locating column is released by the clamping part. The lens cap device can automatically open the lens cap and has a simple structure and a low manufacture cost; and moreover, the process of opening the lens cover does not consume energy, thereby reducing the use cost. The invention also discloses the projection machine.
Description
Technical field
The invention belongs to the lens cap technical field, relate in particular to a kind of lens cap device and projector.
Background technology
Projector is the video device that the modern commonly uses, and is widely used in bulletin, meeting or education and training, data can be projeced on larger plane or screen by projector.In the use procedure of projector, must picture be transmitted through the external world by camera lens, if the camera lens surface by scratch or when being stained with dust, the image that projector throws by camera lens will be smudgy.Therefore, must keep lens cleaning and avoid extraneous dust to stick at the camera lens surface.
Projector comprises at least: casing; Be arranged at the camera lens in casing; Be opened on casing, the mirror plate corresponding with lens location; The air draft pipeline that is used for heat radiation; Be opened in the exhaust outlet on casing.Present lens cap mainly contains two kinds of forms: the first, and the mirror plate of projector arranges external thread, and internal thread is set on lens cap, in the time will using projector, lens cap is screwed off from mirror plate; The second, lens cap is connected with power part, when needs use projector, drives the power part running, drives lens cap in the time of the power part running and automatically opens.
But, when can't starting working in projector, automatically opens above-mentioned the first lens cap, although and the second lens cap can be opened automatically, but to configure in addition power part for lens cap, this cause lens cap complex structure, improved the manufacturing cost of lens cap, and the running of power part need to expend the energy, improved the use cost of lens cap.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of lens cap device, it is simple in structure, can realize automatic unlatching, and its manufacturing cost and use cost are lower.
For achieving the above object, the invention provides following technical scheme:
A kind of lens cap device is applied to projector, comprises lens cap, reference column, elastomeric element, sensitive film and metal snap fit;
Casing, the other end that one end of described elastomeric element is fixed in described projector is connected in an end of described lens cap, and described elastomeric element can provide power away from the mirror plate of described projector to described lens cap;
Described reference column and described sensitive film are arranged at the inboard of described lens cap;
Described metal snap fit is comprised of two different sheet metals of thermal expansivity, comprises main body and holding section;
When described projector did not open, described metal snap fit can contact with described sensitive film, and described holding section can hold described reference column; When described projector opens, intensifications of being heated of described metal snap fit, the little sheet metal generation deflection of described metal snap fit thermotropism expansion coefficient, the described reference column of described holding section release.
Preferably, in above-mentioned lens cap device, the curved structure in described holding section.
Preferably, in above-mentioned lens cap device, two sheet metals that form described metal snap fit are stainless steel substrates and aluminium flake, are perhaps tin sheet and lead flake, are perhaps tin sheet and zinc metal sheet.
Preferably, in above-mentioned lens cap device, described sensitive film is provided with the sheet metal of black coating for the surface.
Preferably, in above-mentioned lens cap device, the arranged outside of described lens cap has pulling part.
The invention also discloses a kind of lens cap device, be applied to projector, comprise lens cap, sensitive film and support component;
Described sensitive film is arranged at the inboard of described lens cap;
Described support component contacts from described sensitive film, is comprised of two different sheet metals of thermal expansivity, and the one end is fixed in the casing of projector, and the other end is connected in inboard or the sensitive film of described lens cap;
When described projector did not open, the described lens cap of described support member supports was positioned at the mirror plate place of described projector; When described projector opens, the intensification of being heated of described support component, described support component drives to the little sheet metal generation deflection of thermal expansivity the exhaust outlet that described lens cap moves to described projector.
Preferably, in above-mentioned lens cap device, two sheet metals that form described support component are stainless steel substrates and aluminium flake, are perhaps tin sheet and lead flake, are perhaps tin sheet and zinc metal sheet.
Preferably, in above-mentioned lens cap device, described sensitive film is provided with the sheet metal of black coating for the surface.
Preferably, in above-mentioned lens cap device, described support component drives described lens cap and moves to one of a plurality of exhaust outlets of described projector.
The invention also discloses a kind of projector, comprising: casing, camera lens, mirror plate, air draft pipeline and exhaust outlet also comprise above-mentioned any lens cap device.
This shows, in the above-mentioned disclosed lens cap device of the present invention, by sensitive film, the light that projector projects is converted to heat energy, under the effect of heat energy, by the different sheet metal of two thermal expansivity and the metal snap fit generation deflection that forms, fixed leg is deviate from from the holding section of metal snap fit, and lens cap is opened under the restoring force effect of elastomeric element automatically afterwards.Lens cap device disclosed by the invention need not to arrange in addition power part just can realize automatic unlatching, its simple in structure, low cost of manufacture, and the automatic unlatching of lens cap do not consume the energy, reduced use cost.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of lens cap device disclosed by the invention when being in closed condition;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the structural representation of lens cap device shown in Figure 1 when being in opening;
Fig. 4 is the structural representation of another kind of metal snap fit disclosed by the invention;
Fig. 5 is the structural representation of another kind of lens cap device disclosed by the invention when being in closed condition;
Fig. 6 is the structural representation of lens cap device shown in Figure 5 when being in opening.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention discloses a kind of lens cap device, it is simple in structure, can realize automatic unlatching, and its manufacturing cost and use cost are lower.
Referring to Fig. 1, Fig. 1 is the structural representation of a kind of lens cap device disclosed by the invention when being in closed condition.Comprise: lens cap 11, elastomeric element 12, sensitive film 13, metal snap fit 14 and reference column 15.
Wherein, casing 101, the other end that an end of elastomeric element 12 is fixed in projector is connected in an end of lens cap 11, can provide power away from the mirror plate 102 of projector to lens cap 11.In force, elastomeric element 12 can be spring or rope with retractility, and the quantity of elastomeric element 12 can be for a plurality of, and can provide larger restoring force this moment.
Be provided with the mirror plate corresponding with lens location 102 on casing 101, lens cap 11 can all cover mirror plate 102, inboard (side relative with camera lens) at lens cap 11 is provided with reference column 15 and sensitive film 13, and sensitive film 13 can be heat energy with transform light energy.
The structure of metal snap fit 14 as shown in Figure 2, be comprised of two different sheet metals 141 and 142 of thermal expansivity, metal snap fit 14 comprises main body 143 and holding section 144, when projector does not open, lens cap 11 is positioned at mirror plate 102 places, and metal snap fit 14 can contact with sensitive film 13.
When projector did not open, lens cap 11 was positioned at mirror plate 102 places of projector, and namely lens cap is in closed condition, and the holding section 144 of metal snap fit 14 can hold reference column 15.When projector starts working, camera lens passes through mirror plate 102 to extraneous throw light, the sensitive film 13 that is arranged at the lens cap inboard this moment can be with the light energy transform into heat energy that receives, when being in closed condition due to camera lens, metal snap fit 14 can contact with sensitive film, so the heat energy that sensitive film 13 produces will be passed on metal snap fit 14.Rising along with metal snap fit 14 temperature, deformation can occur in two sheet metals that form metal snap fit 14, because the thermal expansivity of two sheet metals is different, metal snap fit 14 can be to the less sheet metal place's generation deflection of thermal expansivity, at this moment, fixed leg 15 will be deviate from from metal snap fit 14, and to elastomeric element 12 place direction motions, lens cap 11 is unlocked (as shown in Figure 3) lens cap 11 under the effect of elastomeric element 12 restoring forces.
After closing projector, pull round about lens cap 11, fixed leg 15 is stuck in holding section 144, close lens cap 11.
In the above-mentioned disclosed lens cap device of the present invention, by sensitive film 13, the light that projector projects is converted to heat energy, under the effect of heat energy, deflection occurs in the metal snap fit 14 that is comprised of two different sheet metals 141 and 142 of thermal expansivity, fixed leg 15 is deviate from from the holding section 144 of metal snap fit 14, and lens cap 11 is opened under the restoring force effect of elastomeric element 12 automatically afterwards.Lens cap device disclosed by the invention need not to arrange in addition power part just can realize automatic unlatching, its simple in structure, low cost of manufacture, and the automatic unlatching of lens cap do not consume the energy, reduced use cost.
In force, the structure of metal snap fit 14 can be as shown in Figure 2, the curved structure in holding section 144 of metal snap fit 14.After closing projector, pull in the process of lens cap 11 in the other direction, be convenient to fixed leg 15 is stuck in holding section 144.
The structure of metal snap fit 14 can also be as shown in Figure 4, and the main body 143 of metal snap fit 14 and the angle between holding section 144 are greater than 0 ° and less than 90 °.After closing projector, pull in the process of lens cap 11 in the other direction, be convenient to fixed leg 15 is stuck in holding section 144.
In force, choose thermal expansivity and differ larger metal making sheet metal 141 and 142, its objective is the degree of flexibility that increases metal snap fit 14.Preferably, in two sheet metals that form metal snap fit 14, the sheet metal that thermal expansivity is less can be selected stainless steel substrates, tin sheet or steel disc, and the sheet metal that thermal expansivity is larger can be selected aluminium flake, lead flake or zinc metal sheet.
Produce the ability of heat energy in order to improve sensitive film 13, sensitive film 13 selects the surface to be provided with the sheet metal of black coating.
In addition, can be in the arranged outside pulling part (not shown) of lens cap 11, after closing projector, the user can close lens cap 11 by pulling pulling part.
The invention also discloses a kind of lens cap device, need not just can realize by means of power part the automatic open and close of lens cap.
Referring to Fig. 5, Fig. 5 is the structural representation of another kind of lens cap device disclosed by the invention when being in closed condition.Comprise: lens cap 41, sensitive film 42 and support component 43.
Wherein, lens cap 41 can all cover mirror plate 102, is provided with sensitive film 42 in the inboard (side relative with camera lens) of lens cap 41, and sensitive film 42 can be heat energy with transform light energy.
When projector did not open, support component 43 support lens lids 41 were positioned at mirror plate 102 places of projector, and namely lens cap 41 is in closed condition, guaranteed that lens cap 41 effectively covers mirror plate 102, avoids camera lens by scratch or is stained with dust.When projector starts working, camera lens passes through mirror plate 102 to extraneous throw light, the sensitive film 42 that is arranged at the lens cap inboard this moment can be with the light energy transform into heat energy that receives, because support component 43 and sensitive film 42 keep in touch, so the heat energy that sensitive film 42 produces will be passed to support component 43.Rising along with support component 43 temperature, deformation can occur in two sheet metals that form support component 43, because the thermal expansivity of two sheet metals is different, support component 43 can be to the less sheet metal place's generation deflection of thermal expansivity, and drive lens cap 41 motions, lens cap 41 is opened (as shown in Figure 6).Lens cap 41 after opening is positioned at exhaust outlet 103 places of projector, the amount of heat that projector produces in operational process is discharged from exhaust outlet 103, because lens cap 41 is positioned at exhaust outlet 103 places, so sensitive film 42 can continue to receive heat energy, support component 43 remains on current state under the effect of heat energy.After projector closes, will no longer produce heat, support component 43 coolings gradually this moment, when it was cooled to normal temperature, two sheet metals that form support component 43 returned to normal, and drove lens cap 41 and kept in the center, cover mirror plate 102 places, complete autoshutdown.
In the above-mentioned disclosed lens cap device of the present invention, by sensitive film 42, the light that projector projects is converted to heat energy, under the effect of heat energy, deflection occurs in the support component 43 that is comprised of two different sheet metals of thermal expansivity, the motion of drive lens cap realizes the automatic unlatching of lens cap; After the heat energy disappearance that acts on support component 43, two sheet metals that form support component 43 return to normal, and drive lens cap 41 and keep in the center, and complete autoshutdown.
In force, choose the metal that thermal expansivity differs larger and make respectively sheet metal, its objective is the degree of flexibility that increases support component 43.Preferably, in two sheet metals that form support component 43, the sheet metal that thermal expansivity is larger can be selected stainless steel substrates, tin sheet or steel disc, and the sheet metal that thermal expansivity is less can be selected aluminium flake, lead flake or zinc metal sheet.
Produce the ability of heat energy in order to improve sensitive film 42, sensitive film 42 selects the surface to be provided with the sheet metal of black coating.
When projector had a plurality of exhaust outlet, support component 43 drove one that lens cap moves in a plurality of exhaust outlets and gets final product after being heated.
The invention also discloses a kind of projector, comprise casing, camera lens, mirror plate, air draft pipeline, exhaust outlet and lens cap device.This lens cap device is above-mentioned disclosed any one lens cap device of the present invention, and when opening in projector, lens cap can be opened automatically.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a lens cap device, be applied to projector, it is characterized in that, comprises lens cap, reference column, elastomeric element, sensitive film and metal snap fit;
Casing, the other end that one end of described elastomeric element is fixed in described projector is connected in an end of described lens cap, and described elastomeric element can provide power away from the mirror plate of described projector to described lens cap;
Described reference column and described sensitive film are arranged at the inboard of described lens cap, and described sensitive film can be heat energy with transform light energy, and described sensitive film is provided with the sheet metal of black coating for the surface;
Described metal snap fit is comprised of two different sheet metals of thermal expansivity, comprises main body and holding section;
When described projector did not open, described metal snap fit can contact with described sensitive film, and described holding section can hold described reference column; When described projector opens, intensifications of being heated of described metal snap fit, the little sheet metal generation deflection of described metal snap fit thermotropism expansion coefficient, the described reference column of described holding section release.
2. lens cap device according to claim 1, is characterized in that, the curved structure in described holding section.
3. lens cap device according to claim 1 and 2, is characterized in that, two sheet metals that form described metal snap fit are stainless steel substrates and aluminium flake, are perhaps tin sheet and lead flake, are perhaps tin sheet and zinc metal sheet.
4. lens cap device according to claim 3, is characterized in that, the arranged outside of described lens cap has pulling part.
5. a lens cap device, be applied to projector, it is characterized in that, comprises lens cap, sensitive film and support component;
Described sensitive film is arranged at the inboard of described lens cap, and described sensitive film can be heat energy with transform light energy, and described sensitive film is provided with the sheet metal of black coating for the surface;
Described support component contacts from described sensitive film, is comprised of two different sheet metals of thermal expansivity, and the one end is fixed in the casing of projector, and the other end is connected in inboard or the sensitive film of described lens cap;
When described projector did not open, the described lens cap of described support member supports was positioned at the mirror plate place of described projector; When described projector opens, the intensification of being heated of described support component, described support component drives to the little sheet metal generation deflection of thermal expansivity the exhaust outlet that described lens cap moves to described projector.
6. lens cap device according to claim 5, is characterized in that, two sheet metals that form described support component are stainless steel substrates and aluminium flake, are perhaps tin sheet and lead flake, are perhaps tin sheet and zinc metal sheet.
7. lens cap device according to claim 6, is characterized in that, described support component drives described lens cap and moves to one of a plurality of exhaust outlets of described projector.
8. projector comprises: casing, camera lens, mirror plate, air draft pipeline and exhaust outlet, it is characterized in that, and also comprise the described lens cap device of any one in claim 1～7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138859 CN102221770B (en) | 2011-05-25 | 2011-05-25 | Lens cap device and projection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110138859 CN102221770B (en) | 2011-05-25 | 2011-05-25 | Lens cap device and projection machine |
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| Publication Number | Publication Date |
|---|---|
| CN102221770A CN102221770A (en) | 2011-10-19 |
| CN102221770B true CN102221770B (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110138859 Expired - Fee Related CN102221770B (en) | 2011-05-25 | 2011-05-25 | Lens cap device and projection machine |
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| CN (1) | CN102221770B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105377323B (en) * | 2013-04-19 | 2019-07-23 | 祖雷克斯制药公司 | Medical skin applicator |
| CN109031862B (en) * | 2018-08-28 | 2022-03-22 | 深圳市科迈信息技术有限公司 | Outdoor projector |
| CN110876044B (en) * | 2018-08-30 | 2021-11-12 | 深圳光峰科技股份有限公司 | Projection system and automatic starting method of projection equipment |
| CN115493052B (en) * | 2022-11-16 | 2023-02-03 | 山东省物化探勘查院 | Portable level |
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| JPH1039415A (en) * | 1996-05-20 | 1998-02-13 | Hitachi Ltd | Projection lens device and projection image display device using the same |
| JP2004245986A (en) * | 2003-02-13 | 2004-09-02 | Seiko Epson Corp | Projector |
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| CN102221770A (en) | 2011-10-19 |
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