CN107290923B - Carousel and advertisement projection lamp - Google Patents
Carousel and advertisement projection lamp Download PDFInfo
- Publication number
- CN107290923B CN107290923B CN201710710391.XA CN201710710391A CN107290923B CN 107290923 B CN107290923 B CN 107290923B CN 201710710391 A CN201710710391 A CN 201710710391A CN 107290923 B CN107290923 B CN 107290923B
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- Prior art keywords
- projection lens
- turntable
- projection
- hole
- rotary table
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
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- 229920003023 plastic Polymers 0.000 description 14
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- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 229920006351 engineering plastic Polymers 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Classifications
-
- 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
- G03B23/00—Devices for changing pictures in viewing apparatus or projectors
- G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
- G03B23/10—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier
- G03B23/105—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier disc carriers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
- G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Adornments (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention discloses a turntable and an advertisement projection lamp, wherein a through hole is formed in the turntable, and a projection lens which is movably arranged relative to the turntable is arranged right above the through hole; the rotary table is provided with an adjusting piece for adjusting the vertical distance between the projection lens and the rotary table; limiting structures used for limiting the movable range of the projection lens are correspondingly arranged around the through holes. The light source irradiates on the projection lens through the through hole on the turntable, so that the pattern arranged on the projection lens is projected on the wall or ground and other objects. Because the adjusting piece is arranged on the rotary table, when the projection lenses with different thicknesses are used, the distance between the projection lenses and the rotary table can be adjusted by the adjusting piece, and then the distance between the light source and the projection lenses is changed, so that the definition and the effect of projection are optimal.
Description
Technical Field
The invention relates to the technical field of lamps, in particular to a turntable and an advertisement projection lamp.
Background
The advertisement projection lamp is a novel advertisement product with high timeliness and fashion, can attract curiosity of customers, achieves the best propaganda effect, and is widely applied to places such as exhibition, museums, coffee shops, markets and the like.
The advertisement projection lamp is provided with a projection lens, and various patterns are arranged on the projection immersion according to the advertisement requirement. The light irradiates on the projection lens, and the pattern is projected and displayed on the wall surface, the ground and other objects, so as to achieve the effect of propaganda and the like.
Due to different occasions or changing requirements, the projection lens of the advertisement projection lamp is required to be replaced in many times so as to display a required pattern. However, the thickness of the different projection lenses is different, and parameters such as the focal length of the projection lenses are different due to the change of the thickness, so that the definition of the projection is also changed. After the projection lenses with different thicknesses are replaced, the definition of projection is poor, and the effect of projection is also adversely affected.
The problem that the definition of projection is poor after the projection lens of different thickness is changed can not be solved to current advertisement projection lamp. Based on the urgent need, this problem is to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a turntable and an advertisement projection lamp, which are used for solving the problems in the prior art.
To solve the above problems, the present invention provides: a turntable for mounting a projection lens, the turntable being provided with a through hole for the projection lens;
the rotary table is provided with an adjusting piece for adjusting the vertical distance between the projection lens and the rotary table;
limiting structures used for limiting the movable range of the projection lens are correspondingly arranged around the through holes.
As a further improvement of the technical scheme, the adjusting piece is a bolt;
the bolt is in threaded connection with the turntable.
As a further improvement of the technical scheme, a plurality of bolts are distributed in an annular array around the through hole.
As a further improvement of the technical scheme, the limiting structure comprises a plurality of mutually parallel positioning columns arranged around the through hole;
the projection lens is positioned between the positioning columns.
As a further improvement of the technical scheme, the positioning columns are distributed in an annular array around the through hole.
As a further improvement of the technical scheme, the positioning column is provided with a magnet;
an iron sheet is arranged on the projection lens.
As a further improvement of the above technical solution, the cross section of the through hole is circular or rectangular.
As a further improvement of the above technical solution, the cross-sectional area of the through hole is smaller than the cross-sectional area of the projection lens.
As a further improvement of the above technical solution, the plurality of through holes are distributed on the turntable in a ring array.
The invention also provides: an advertising projection lamp comprising a dial as claimed in any one of the preceding claims.
The beneficial effects of the invention are as follows: the invention provides a rotary table and an advertisement projection lamp. The rotary table is provided with an adjusting piece for adjusting the vertical distance between the projection lens and the rotary table, and limiting structures for limiting the movable range of the projection lens are correspondingly arranged around the through holes.
The light source irradiates on the projection lens through the through hole on the turntable, so that the pattern arranged on the projection lens is projected on the wall or ground and other objects. Because the adjusting piece is arranged on the rotary table, when the projection lenses with different thicknesses are used, the distance between the projection lenses and the rotary table can be adjusted by the adjusting piece, and then the distance between the light source and the projection lenses is changed, so that the definition and the effect of projection are optimal.
Simultaneously, be provided with limit structure in the correspondence of through-hole all around, utilize limit structure can restrict projection lens's movable range for projection lens can be stabilized in fixed within range, can be better just to the through-hole. Meanwhile, due to the existence of the limiting structure, the position of the projection lens is also convenient to adjust, so that the advertising projection lamp achieves the optimal projection effect.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. It is to be understood that the following drawings illustrate only certain embodiments of the invention and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
FIG. 1 is a schematic view of a turntable according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing connection between a turntable and a motor in embodiment 3 of the present invention.
Description of main reference numerals:
1000-rotating disc; 1100-a via; 1200-projection lens; 1300-an adjusting member; 1400-positioning columns; 1500-magnet; 2000-motor; 2100—first gear; 2200-a second gear; 2300-fixing plate.
Detailed Description
Hereinafter, various embodiments of the present invention will be described more fully. The invention is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the various embodiments of the invention to the specific embodiments disclosed herein, but rather the invention is to be understood to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the invention.
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present invention indicate the presence of the disclosed functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the invention, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the present invention, the expression "at least one of a or/and B" includes any or all combinations of the words listed simultaneously. For example, the expression "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", etc.) used in the various embodiments of the invention may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: in the present invention, unless explicitly specified and defined otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between the interiors of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, it should be understood by those of ordinary skill in the art that the terms indicating an orientation or a positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of description, not to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the invention belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the invention.
Example 1
In the present embodiment, a turntable 1000 is proposed. The turntable 1000 is used for installing a projection lens, wherein a through hole 1100 is arranged on the turntable 1000, and a projection lens 1200 is arranged right above the through hole 1100. The light emitted from the light source irradiates the projection lens 1200 through the through hole 1100, and then the pattern on the projection lens 1200 is displayed.
For the projection lens 1200 with different thickness, the distance between the projection lens 1200 and the light source needs to be adjusted to optimize the definition and the projection effect of the projection.
For this reason, in the present embodiment, the projection lens 1200 is movably disposed with respect to the turntable 1000, and at the same time, the adjusting member 1300 for adjusting the vertical distance between the projection lens 1200 and the turntable 1000 is disposed on the turntable 1000, so that the vertical distance between the projection lens 1200 and the turntable 1000 can be adjusted by the adjusting member 1300.
On an advertising projection lamp, the distance between the light source and the dial 1000 is fixed, and the distance between the light source and the projection lens 1200 can be changed by adjusting the distance between the projection lens 1200 and the dial 1000.
When the advertisement projection lamp is operated, the projection lens 1200 should be located right above the through hole 1100, but the position of the projection lens 1200 is changed due to the deviation of installation or other external factors, so as to affect the projection effect.
For this reason, in the present embodiment, a limiting structure for limiting the movable range of the projection lens 1200 is correspondingly disposed around the through hole 1100. The movable range of projection is limited by the limiting structure, so that the movable range of the projection lens 1200 is fixed in a certain range, and the through hole 1100 can be aligned more accurately. Meanwhile, due to the existence of the limiting structure, the position of the projection lens 1200 can be conveniently adjusted, so that the projection effect can be optimal.
Example 2
Referring to fig. 1, in the present embodiment, a turntable 1000 is provided, a through hole 1100 is provided on the turntable 1000, a projection lens 1200 is provided right above the through hole 1100, and the projection lens 1200 is movably disposed relative to the turntable 1000.
The cross-sectional shape of the through-holes may be circular or rectangular, and in other embodiments, the shape of the through-holes may be configured as desired.
The turntable 1000 is provided with an adjusting member 1300 for adjusting a vertical distance between the projection lens 1200 and the turntable 1000. The periphery of the through hole 1100 is correspondingly provided with a limiting structure for limiting the movable range of the projection lens 1200.
In this embodiment, the adjustment member 1300 is selected to be a bolt. Screw holes are formed in corresponding positions of the turntable 1000, and the bolts correspond to the screw holes, so that the bolts are in threaded connection with the turntable 1000.
As can be seen from fig. 1, the bolt is located between the turntable 1000 and the projection lens 1200, and the vertical distance between the projection lens 1200 and the turntable 1000 is adjusted by the bolt.
The projection lens 1200 is attached to the bolt, and the bolt has a supporting force on the projection lens 1200. Since the projection lens 1200 is movably disposed with respect to the turntable 1000, when the bolt is screwed on the turntable 1000 at different depths, the vertical distance between the projection lens 1200 and the turntable 1000 is changed due to the supporting force of the bolt. Thereby achieving the adjustment of the vertical distance between the projection lens 1200 and the turntable 1000.
The bolts are arranged in a plurality, and are distributed in an annular array around the through hole 1100. In the present embodiment, each through hole 1100 is provided with 3 bolts. In other embodiments, the number of bolts may be set as desired.
In order to facilitate replacement and installation of the projection lens 1200 and adjustment of the distance between the projection lens 1200 and the turntable 1000, and simultaneously, in order to achieve movable connection between the projection lens 1200 and the turntable 1000, in this embodiment, the projection lens 1200 is detachably connected with the limiting structure.
For this purpose, the limit structure may be provided with a magnet 1500, and correspondingly, the projection lens 1200 may be provided with an iron piece. The magnetic field force is utilized to realize the detachable connection between the projection lens 1200 and the limiting mechanism.
In this embodiment, the limiting structure includes a plurality of positioning posts 1400 disposed parallel to each other, the positioning posts 1400 are disposed around the through hole, and the projection lens 1200 is disposed between the positioning posts 1400. The positioning columns corresponding to each through hole are distributed in an annular array around the through hole.
In this embodiment, each through hole 1100 corresponds to three positioning posts 1400, wherein adjacent through holes 1100 share the same positioning post 1400. Wherein, the magnet 1500 is disposed on the positioning column 1400.
In the present embodiment, the projection lens 1200 is provided as a circular lens. Meanwhile, since the limiting structure in the present embodiment is formed of a plurality of positioning posts 1400 distributed in an annular array, an inscribed circle is included between the positioning posts 1400.
To mount the projection lens 1200 between the posts 1400, the radius of the inscribed circle should be greater than or equal to the radius of the projection lens 1200.
Since the distance between the projection lens 1200 and the turntable 1000 needs to be adjusted by the bolts, the cross-sectional area of the through hole 1100 should be smaller than that of the projection lens 1200, so that it is convenient to ensure that the projection lens 1200 can be contacted with the bolts provided on the turntable 1000. If the cross-sectional area of the through-hole 1100 is larger than the cross-sectional area of the projection lens 1200: on the one hand, the position of the bolt is difficult to set; another advantage is that light can pass through the gap between the through hole 1100 and the projection lens 1200 during projection, so that the projected effect is affected.
In this embodiment, the turntable 1000 may alternatively be made of plastic. The plastic product has low price and is easy to be molded.
At present, a large number of resins are used in plastic factories, such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, ABS, polyurethane and the like. Various plastic products made from the raw materials have the following comprehensive performance characteristics: the price is low; the product is easy to mold; the plastic product is light; the corrosion resistance is good.
Plastics and their finished products are of many kinds. The plastic products are classified according to the purposes of the plastic products and can be classified into general plastics, engineering plastics, high-temperature resistant plastics and special-purpose plastics.
In view of manufacturing costs and use, a general purpose plastic may be selected here.
There are many molding processes for plastic products, such as injection molding, blow molding, compression molding, vacuum molding, extrusion molding, calendaring and casting. The specific material is to select the molding process according to the shape of the product, the processed raw material, etc.
The turntable 1000 may be manufactured by an injection molding process.
The plastic product injection molding production characteristics are as follows: can be molded in an injection mold in a short time, and has simple production process and high efficiency. The injection molding can be used for molding parts with complex appearance at one time, and the dimension is accurate.
The mold is manufactured according to the shape and size of the turntable 1000. The raw materials are prepared, molded in injection molding equipment, and the turntable 1000 is manufactured through the subsequent procedures of heat treatment and the like.
In other embodiments, the turntable 1000 can be made of other materials. For example, the turntable 1000 may be made of a metal material such as an aluminum alloy.
In this embodiment, a plurality of through holes 1100 are provided on the turntable 1000, and an annular array is distributed on the turntable 1000. A projection lens 1200 may be disposed directly above each through hole 1100, and when the turntable 1000 rotates, the position of the projection lens 1200 directly in front of the light source changes accordingly, and when the projection lens 1200 at different positions rotates to directly in front of the light source, a pattern on the corresponding projection lens 1200 is projected. Whereby a better advertising effect can be achieved.
Example 3
In the present embodiment, an advertisement projection lamp is provided with the dial 1000 as set forth in the above embodiment.
As shown in fig. 2, in order to realize the rotation of the turntable 1000, a first gear 2100 is fixedly provided on the turntable 1000, and a connection shaft is provided on the fixing plate 2300, and the first gear 2100 is rotatably connected with the connection shaft. Meanwhile, a motor 2000 is fixed to the fixed plate 2300, and a second gear 2200 is provided to a driving shaft of the motor 2000, the second gear 2200 being engaged with the first gear 2100. After the motor 2000 is started, the second gear 2200 is driven by the driving shaft to rotate, and then drives the first gear 2100 to rotate, and the turntable 1000 and the first gear 2100 synchronously rotate because the first gear 2100 is fixedly connected with the turntable 1000.
In other embodiments, the turntable 1000 may be directly driven by the motor 2000, or may be driven to rotate by other structures or means.
Those skilled in the art will appreciate that the drawing is merely a schematic illustration of a preferred implementation scenario and that the modules or flows in the drawing are not necessarily required to practice the invention.
Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The foregoing embodiment numbers are merely for description, and do not represent advantages or disadvantages of the implementation scenario.
The foregoing disclosure is merely illustrative of some embodiments of the invention, and the invention is not limited thereto, as modifications may be made by those skilled in the art without departing from the scope of the invention.
Claims (2)
1. The rotary table is characterized in that the rotary table is used for installing a projection lens, and a through hole right opposite to the projection lens is formed in the rotary table;
the rotary table is provided with a plurality of adjusting pieces for adjusting the vertical distance between the projection lens and the rotary table; the plurality of adjusting pieces are distributed in an annular array around the through hole;
a plurality of positioning columns used for limiting the movable range of the projection lens are correspondingly arranged around the through hole; the positioning columns are arranged in parallel around the through hole; the projection lens is positioned between the positioning columns; the positioning columns are distributed in an annular array around the through hole;
the cross section of the through hole is circular; the cross section area of the through hole is smaller than that of the projection lens; an inscribed circle is arranged among the positioning columns; the radius of the inscribed circle is larger than or equal to the radius of the projection lens;
the adjusting piece is a bolt; the bolt is in threaded connection with the turntable;
the positioning column is provided with a magnet; an iron sheet is arranged on the projection lens;
the through holes are multiple, and the annular arrays are distributed on the turntable.
2. An advertising projection lamp comprising the turntable of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710391.XA CN107290923B (en) | 2017-08-18 | 2017-08-18 | Carousel and advertisement projection lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710710391.XA CN107290923B (en) | 2017-08-18 | 2017-08-18 | Carousel and advertisement projection lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107290923A CN107290923A (en) | 2017-10-24 |
| CN107290923B true CN107290923B (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710710391.XA Active CN107290923B (en) | 2017-08-18 | 2017-08-18 | Carousel and advertisement projection lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107290923B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287639B (en) * | 2018-01-23 | 2021-06-25 | 歌尔科技有限公司 | Depth of field data acquisition method and device, projection component and terminal equipment |
| KR101962625B1 (en) * | 2018-11-29 | 2019-03-27 | 주식회사 아보네 | Rotating type shadow advertising system |
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|---|---|---|---|---|
| GB483820A (en) * | 1936-09-09 | 1938-04-27 | Albert George Hillman | Improvements in or relating to cameras |
| US5298984A (en) * | 1991-12-18 | 1994-03-29 | Sony Corporation | Device for positioning the cathode ray tubes in a projection television system |
| TW200704999A (en) * | 2005-07-19 | 2007-02-01 | Asia Optical Co Inc | Back focus adjustment device |
| JP2013161049A (en) * | 2012-02-08 | 2013-08-19 | Kiyohara Optics Inc | Lens with magnet mount, lens with magnetic body mount, lens kit, and telescope |
| CN205334037U (en) * | 2015-12-31 | 2016-06-22 | 郑州乐迪光电科技有限公司 | Auto -change over device is broadcast to projection lens wheel |
| CN207067653U (en) * | 2017-08-18 | 2018-03-02 | 曾民霖 | A kind of rotating disk and advertisement projection lamp |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009117000A (en) * | 2007-11-09 | 2009-05-28 | Funai Electric Co Ltd | Optical pickup |
-
2017
- 2017-08-18 CN CN201710710391.XA patent/CN107290923B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB483820A (en) * | 1936-09-09 | 1938-04-27 | Albert George Hillman | Improvements in or relating to cameras |
| US5298984A (en) * | 1991-12-18 | 1994-03-29 | Sony Corporation | Device for positioning the cathode ray tubes in a projection television system |
| TW200704999A (en) * | 2005-07-19 | 2007-02-01 | Asia Optical Co Inc | Back focus adjustment device |
| JP2013161049A (en) * | 2012-02-08 | 2013-08-19 | Kiyohara Optics Inc | Lens with magnet mount, lens with magnetic body mount, lens kit, and telescope |
| CN205334037U (en) * | 2015-12-31 | 2016-06-22 | 郑州乐迪光电科技有限公司 | Auto -change over device is broadcast to projection lens wheel |
| CN207067653U (en) * | 2017-08-18 | 2018-03-02 | 曾民霖 | A kind of rotating disk and advertisement projection lamp |
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| Publication number | Publication date |
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| CN107290923A (en) | 2017-10-24 |
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