CN107355658B - A kind of projector mount application method - Google Patents
A kind of projector mount application method Download PDFInfo
- Publication number
- CN107355658B CN107355658B CN201710601474.5A CN201710601474A CN107355658B CN 107355658 B CN107355658 B CN 107355658B CN 201710601474 A CN201710601474 A CN 201710601474A CN 107355658 B CN107355658 B CN 107355658B
- Authority
- CN
- China
- Prior art keywords
- projector
- slide
- telescopic rod
- confirmation
- heat release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012790 confirmation Methods 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000011324 bead Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
- F16M13/022—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle repositionable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
-
- 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
- G03B21/142—Adjusting of projection optics
-
- 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
- G03B21/145—Housing details, e.g. position adjustments thereof
-
- 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
- G03B21/16—Cooling; Preventing overheating
-
- 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
- G03B21/54—Accessories
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a kind of projector mount application methods, and by sliding rail after taking out in conference table, two hinged sliding rails are opened；The both ends of slide are respectively placed on two one slide rails, slide is slided on the slide rail, confirmation slide can be slided normally on the slide rail；Confirm that the second heat release hole and the center line of the first heat release hole are overlapped；Whether confirmation supporting pad falls off on bottom plate, and projector is placed on and is supported by supporting pad without after falling off by confirmation；Lever is opened, by the window on the projection mouth and fixed bin body of projector to it, confirms that the image of projector can project on wall completely.The present invention is avoided and is damaged to ceiling convenient for adjusting angle, and can carry out that position is mobile at any time, at the same through the invention in installation method, occasionally can effectively improve the cleaning degree of projector, ensure that the stability of projector；It is simple with structure, long service life and the beneficial effects such as easy-maintaining.
Description
Technical field
The present invention relates to a kind of projector mount application methods.
Background technique
Projector, also known as projector are a kind of equipment that can be projected image or video on curtain, can be by not
The same computer of interface together, VCD, DVD, BD, game machine, DV etc., which are connected, plays corresponding vision signal.Many times need
Projector is adjusted, but projector is hung on the ceiling by projector mount, thus when adjusting angle
It is not easy to adjust, and it also requires aperture nailing on the ceiling, damages ceiling, in addition if necessary by video camera
It moves to another room, then drilling will be left on the ceiling, is not easy to repair day backplate.
Summary of the invention
It is realized the purpose of the present invention is technical solution in this way, it includes: a kind of projector mount user
Method, comprising the following steps:
Two hinged sliding rails after taking out in conference table, are opened sliding rail by step 1)；
One end of two one slide rails is attached with conference table by step 2), and the both ends of slide are respectively placed at two cunnings
On rail, slide is slided on the slide rail, confirmation slide can be slided normally on the slide rail；
Step 3) is fixed on slide by telescopic rod, adjusts the height of telescopic rod, and whether can be normal to telescopic rod
It is flexible to be confirmed；
Step 4) lowers telescopic rod, is then connected through a screw thread mounting base in the upper end of telescopic rod, and in mounting base
Fixed bin body is installed, several the first heat release holes are offered in mounting base, by the second heat release hole of fixed bin body bottom and first
Heat release hole corresponds, and the second heat release hole of confirmation is overlapped with the center line of the first heat release hole；
Whether step 5) confirmation supporting pad falls off on bottom plate, and projector is placed on logical by confirmation without after falling off
Cross supporting pad support；
Step 6) opens lever, by the window on the projection mouth and fixed bin body of projector to it, confirms the figure of projector
As that can project on wall completely；
Harness and projector are attached by step 7), by the other end of harness by pulling out between two levers, and even
It is connected on external equipment, finally puts down lever；
Step 8) opens whether projector confirmation projecting light is blocked by foreboard, then adjusts to the clarity of projector
Section, after regulating clarity, manpower holds telescopic rod, and slide is slided on the slide rail, so that the distance of projector is adjusted,
After distance is adjusted, telescopic rod is adjusted, to adjust the height of projector；After adjusting, projector can be begun to use；
Step 9) adjusts telescopic rod, declines telescopic rod when after use, closing power supply；
Step 10) opens lever, and harness is pulled up from projector, then takes out projector；
Step 11) successively dismantles fixed bin body, mounting base and telescopic rod, finally dismantles slide from sliding rail；
Step 12) removes one end of sliding rail from conference table, and the first sliding rail section of sliding rail and the second sliding rail section are rolled over
It is folded；
Sliding rail, fixed bin body, mounting base, telescopic rod and slide are put into conference table bottom by step 13).
Further, it in step 3), before reusing telescopic rod, checks whether telescopic rod has slight crack, confirms flawless lossless
After bad, confirm in the screw thread to telescopic rod, whether confirmation screw thread intact, confirm it is errorless after, by telescopic rod and mounting base into
Row connection.
Further, the second heat release hole of fixed bin body bottom and the first heat release hole are corresponded, confirms the second heat release hole
After being overlapped with the center line of the first heat release hole, by fixed bin body and mounting base to it is opposite it is reversed slightly pull, confirmation is
It is no to there is loosening to show appearance.
Further, whether step 5) confirmation supporting pad falls off on bottom plate, after confirmation nothing falls off, then confirms the height of supporting pad
Whether degree is consistent, confirms that the height of each supporting pad is consistent.
Further, in step 7), confirmation retention bead portion fastens intact with limiting slot.
Further, in step 8), then confirm that projector projects light is not blocked, the clarity of projector is adjusted
After, after just closing projector, then telescopic rod and slide are adjusted.
By adopting the above-described technical solution, the present invention has the advantage that: the present invention avoids convenient for adjusting angle
Ceiling is damaged, and can carry out that position is mobile at any time, at the same through the invention in installation method, can be occasionally effective
The cleaning degree for improving projector, ensure that the stability of projector；It is simple with structure, long service life and easy-maintaining etc. beneficial
Effect.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target and other advantages of the invention can be wanted by following specification and right
Book is sought to be achieved and obtained.
Detailed description of the invention
Detailed description of the invention of the invention is as follows.
Fig. 1 is the mounting structure schematic diagram of telescopic rod of the present invention and slide；
Fig. 2 is the overlooking structure diagram in Fig. 1；
Fig. 3 is the structural schematic diagram in Fig. 1 with mounting base and fixed bin body；
Fig. 4 is the structural schematic diagram in Fig. 2 with mounting base；
Fig. 5 is the concrete structure schematic diagram of fixed bin body in the present invention；
Fig. 6 be insole board of the present invention, top plate, left plate and right side plate structural schematic diagram；
Fig. 7 is the left view structural representation of Fig. 5；
Fig. 8 is the structural schematic diagram that lever is opened in Fig. 7；
Fig. 9 is the backsight structural representation of Fig. 5.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Shown in following Fig. 1 to Fig. 9, a kind of projector mount application method, comprising the following steps:
Two hinged sliding rails after taking out in conference table, are opened sliding rail by step 1)；
One end of two one slide rails is attached with conference table by step 2), and the both ends of slide are respectively placed at two cunnings
On rail, slide is slided on the slide rail, confirmation slide can be slided normally on the slide rail；
Step 3) is fixed on slide by telescopic rod, adjusts the height of telescopic rod, and whether can be normal to telescopic rod
It is flexible to be confirmed；
Step 4) lowers telescopic rod, is then connected through a screw thread mounting base in the upper end of telescopic rod, and in mounting base
Fixed bin body is installed, offers several first heat release holes 5a in mounting base 5, by the second heat release hole of fixed bin body bottom and the
One heat release hole corresponds, and the second heat release hole of confirmation is overlapped with the center line of the first heat release hole；
Whether step 5) confirmation supporting pad falls off on bottom plate, and projector is placed on logical by confirmation without after falling off
Cross supporting pad support；
Step 6) opens lever, by the window on the projection mouth and fixed bin body of projector to it, confirms the figure of projector
As that can project on wall completely；
Harness and projector are attached by step 7), by the other end of harness by pulling out between two levers, and even
It is connected on external equipment, finally puts down lever；
Step 8) opens whether projector confirmation projecting light is blocked by foreboard, then adjusts to the clarity of projector
Section, after regulating clarity, manpower holds telescopic rod, and slide is slided on the slide rail, so that the distance of projector is adjusted,
After distance is adjusted, telescopic rod is adjusted, to adjust the height of projector；After adjusting, projector can be begun to use；
Step 9) adjusts telescopic rod, declines telescopic rod when after use, closing power supply；
Step 10) opens lever, and harness is pulled up from projector, then takes out projector；
Step 11) successively dismantles fixed bin body, mounting base and telescopic rod, finally dismantles slide from sliding rail；
Step 12) removes one end of sliding rail from conference table, and the first sliding rail section of sliding rail and the second sliding rail section are rolled over
It is folded；
Sliding rail, fixed bin body, mounting base, telescopic rod and slide are put into conference table bottom by step 13).
In the present embodiment, in step 3), before reusing telescopic rod, checks whether telescopic rod has slight crack, confirm flawless
After damage, confirm in the screw thread to telescopic rod, whether confirmation screw thread is intact, after confirmation is errorless, by telescopic rod and installation
Seat is attached.
In step 4), the second heat release hole of fixed bin body bottom and the first heat release hole are corresponded, the second heat dissipation of confirmation
After hole is overlapped with the center line of the first heat release hole, by fixed bin body and mounting base to it is opposite it is reversed slightly pull, confirm
Whether there is loosening to show appearance.
Whether step 5) confirmation supporting pad falls off on bottom plate, confirmation without after falling off, then confirm supporting pad height whether
Unanimously, confirm that the height of each supporting pad is consistent.
In step 7), confirmation retention bead portion fastens intact with limiting slot.
In step 8), then confirm that projector projects light is not blocked, after the clarity of projector is adjusted,
Just after projector being closed, then telescopic rod and slide are adjusted.
A kind of projector mount, including conference table 1, the bottom of conference table 1 are provided with two sliding rails 2 and slide 3, slide 3
Both ends be slidably disposed on sliding rail 2 respectively；
At least two dismountable telescopic rods 4 are provided on slide 3, the upper end of each telescopic rod 4 is removably provided with peace
Seat 5 is filled, several first heat release holes 5a is offered in mounting base 5, is removably provided with fixed bin body 6 in mounting base 5；This reality
It applies in example, the bottom of telescopic rod 4 is with slide 3 by the way of being threadedly coupled.
Fixed bin body 6 includes foreboard 7, bottom plate 8, top plate 9, left plate 10 and right side plate 11, and foreboard 7 offers window 7a,
Bottom plate 8 offers several the second heat release hole 8a being used cooperatively with the first heat release hole 5a, the center line of each second heat release hole 8a
It is overlapped with the center line of each first heat release hole 5a；
Several supporting pads 12 are provided in fixed bin body 6, each supporting pad 12 is arranged on bottom plate 8, the front end of top plate 9
It is connect with foreboard 7, the rear end of top plate 9 is hinged with connecting rod 13, and it is vertical with connecting rod 13 that several are provided in connecting rod 13
Lever 14；
Stop bosses 15 are arranged in the lower end of each lever 14, and one end of bottom plate 8 is connect with foreboard 7, the other end of bottom plate 8
It is provided with the limiting slot 16 being used cooperatively with retention bead portion 15.
In the present embodiment, foreboard 7, bottom plate 8, top plate 9, left plate 10 and right side plate 11 are an integral molding structure.Mounting base
It is provided with the first threaded hole 20 on 5, fixed block 21 is provided on bottom plate 8, the second threaded hole 22 is offered on fixed block 21, installs
Seat 5 is detachably connected with fixed bin body 6 by the first threaded hole 20 and the second threaded hole 22.Buffering is provided in limiting slot 16
Pad.Sliding rail 2 is removably connect with conference table 1, and sliding rail 2 includes the first sliding rail section 30 and the second sliding rail section 31, the first sliding rail section
30 and second sliding rail section 31 it is hinged.Fixed bin body 6 is provided with protective pad 50, and protective pad 50 is arranged on foreboard 7.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Scope of the claims in.
Claims (6)
1. a kind of projector mount application method, it is characterised in that: the following steps are included:
Two hinged sliding rails after taking out in conference table, are opened sliding rail by step 1)；
One end of two one slide rails is attached with conference table by step 2), and the both ends of slide are respectively placed at two one slide rails
On, slide is slided on the slide rail, confirmation slide can be slided normally on the slide rail；
Telescopic rod is fixed on slide by step 3) again, adjusts the height of telescopic rod, and whether can normally stretch to telescopic rod
Confirmed；
Step 4) lowers telescopic rod, is then connected through a screw thread mounting base in the upper end of telescopic rod, and install in mounting base
Fixed bin body offers several the first heat release holes in mounting base, and the second heat release hole of fixed bin body bottom and first are radiated
Hole corresponds, and the second heat release hole of confirmation is overlapped with the center line of the first heat release hole；
Whether step 5) confirmation supporting pad falls off on bottom plate, and projector is placed on without after falling off and passes through branch by confirmation
Stake pad support；
Step 6) opens lever, by the window on the projection mouth and fixed bin body of projector to it, confirms the image energy of projector
It is enough to project on wall completely；
Harness and projector are attached by step 7), by the other end of harness by pulling out between two levers, and are connected to
On external equipment, finally lever is put down；
Step 8) opens whether projector confirmation projecting light is blocked by foreboard, and then the clarity of projector is adjusted,
After regulating clarity, manpower holds telescopic rod, and slide is slided on the slide rail, to adjust the distance of projector, far
After nearly adjusting, telescopic rod is adjusted, to adjust the height of projector；After adjusting, projector can be begun to use；
Step 9) adjusts telescopic rod, declines telescopic rod when after use, closing power supply；
Step 10) opens lever, and harness is pulled up from projector, then takes out projector；
Step 11) successively dismantles fixed bin body, mounting base and telescopic rod, finally dismantles slide from sliding rail；
Step 12) removes one end of sliding rail from conference table, and the first sliding rail section of sliding rail and the second sliding rail section are folded；
Sliding rail, fixed bin body, mounting base, telescopic rod and slide are put into conference table bottom by step 13).
2. projector mount application method as described in claim 1, it is characterised in that: in the step 3), reuse flexible
It before bar, checks whether telescopic rod has slight crack, after confirming flawless no damage, confirms in the screw thread to telescopic rod, confirm
Whether screw thread is intact, and after confirmation is errorless, telescopic rod and mounting base are attached.
3. projector mount application method as described in claim 1, it is characterised in that: in the step 4), by fixed bin body
Second heat release hole of bottom and the first heat release hole correspond, and the second heat release hole of confirmation is overlapped with the center line of the first heat release hole
Afterwards, by fixed bin body and mounting base to it is opposite it is reversed slightly pull, be confirmed whether there is loosening to show appearance.
4. projector mount application method as described in claim 1, it is characterised in that: step 5) the confirmation supporting pad is the bottom of at
Whether fall off on plate, after confirmation nothing falls off, then confirms whether the height of supporting pad is consistent, confirm that the height of each supporting pad is uniform
It causes.
5. projector mount application method as described in claim 1, it is characterised in that: in the step 7), confirm limit convex
The portion of rising fastens intact with limiting slot.
6. projector mount application method as described in claim 1, it is characterised in that: in the step 8), then confirm projection
Instrument projecting light is not blocked, after the clarity of projector is adjusted, after just closing projector, then to telescopic rod
It is adjusted with slide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601474.5A CN107355658B (en) | 2017-07-21 | 2017-07-21 | A kind of projector mount application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601474.5A CN107355658B (en) | 2017-07-21 | 2017-07-21 | A kind of projector mount application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355658A CN107355658A (en) | 2017-11-17 |
| CN107355658B true CN107355658B (en) | 2019-02-19 |
Family
ID=60285524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710601474.5A Active CN107355658B (en) | 2017-07-21 | 2017-07-21 | A kind of projector mount application method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355658B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632819A (en) * | 2018-06-21 | 2019-12-31 | 青岛海尔多媒体有限公司 | Projection equipment and projection screen installation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203952963U (en) * | 2014-05-07 | 2014-11-26 | 无锡商业职业技术学院 | A kind of remote control variable bit projecting apparatus |
| CN204201409U (en) * | 2014-11-06 | 2015-03-11 | 刘立静 | A kind of computer teaching projector mount |
| CN204462620U (en) * | 2015-02-13 | 2015-07-08 | 深圳市祈锦通信技术有限公司 | A kind of wireless charging projector with packoff |
| CN106125469A (en) * | 2016-08-17 | 2016-11-16 | 李�杰 | Domestic projecting apparatus with protection |
| CN205859545U (en) * | 2016-07-31 | 2017-01-04 | 唐山师范学院 | Scialyscope protection hanging is cased |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE535940C2 (en) * | 2010-07-16 | 2013-02-26 | Sms Smart Media Solutions Ab | Height adjustable projector screen support |
-
2017
- 2017-07-21 CN CN201710601474.5A patent/CN107355658B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203952963U (en) * | 2014-05-07 | 2014-11-26 | 无锡商业职业技术学院 | A kind of remote control variable bit projecting apparatus |
| CN204201409U (en) * | 2014-11-06 | 2015-03-11 | 刘立静 | A kind of computer teaching projector mount |
| CN204462620U (en) * | 2015-02-13 | 2015-07-08 | 深圳市祈锦通信技术有限公司 | A kind of wireless charging projector with packoff |
| CN205859545U (en) * | 2016-07-31 | 2017-01-04 | 唐山师范学院 | Scialyscope protection hanging is cased |
| CN106125469A (en) * | 2016-08-17 | 2016-11-16 | 李�杰 | Domestic projecting apparatus with protection |
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| Publication number | Publication date |
|---|---|
| CN107355658A (en) | 2017-11-17 |
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