CN209086660U - A kind of online education projection screen retractable volume mechanism - Google Patents
A kind of online education projection screen retractable volume mechanism Download PDFInfo
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- CN209086660U CN209086660U CN201822211109.6U CN201822211109U CN209086660U CN 209086660 U CN209086660 U CN 209086660U CN 201822211109 U CN201822211109 U CN 201822211109U CN 209086660 U CN209086660 U CN 209086660U
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- 238000002627 tracheal intubation Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 15
- 239000000463 material Substances 0.000 description 4
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- 239000004744 fabric Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 101100014158 Caenorhabditis elegans rack-1 gene Proteins 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 239000010720 hydraulic oil Substances 0.000 description 1
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Abstract
The utility model provides a kind of online education projection screen retractable volume mechanism, including rack, the top of rack is equipped with and unreels roller, the axial position for unreeling roller is equipped with unreeling shaft, unreeling shaft is mounted on the top of rack, and the lower part of rack is equipped with winding roller, and the axial position for winding roller is equipped with Scroll, Scroll is mounted on the lower part of rack, and winding roller is in parallel arrangement with roller is unreeled；The medium position of rack is equipped with tensioning regulating mechanism；The tensioning regulating mechanism is mounted on winding roller and unreels between roller.The utility model can carry out tensioning adjusting to projection screen by being tensioned regulating mechanism with during unreeling in winding, keep projection screen tensioning flexible adjustment better；Tensioning adjusting is carried out to projection screen by belt tensioning drum, and the dust on projection screen sweep falling by tapetum, and adsorb dust into shell by suction ventilator, solves the problems, such as to be not easy to handle the dust on screen.
Description
Technical field
The utility model is a kind of online education projection screen retractable volume mechanism, belongs to retractable volume field of mechanisms.
Background technique
Projection screen is one of product most-often used in projector's peripheral equipment, and projection screen is the abbreviation of projection screen；
If projection screen and proper, the available good drop shadow effect of collocation, projector.Transparent series possesses unique
Bright imaging characteristic, while guaranteeing high grade picture projection, it is showcase that the more permeable screen of viewer, which sees behind scenery,
Or dull showcase is become novel transparent screen, captures viewing by the choosing of the ideal of interaction display, special concept of projection
The curiosity and attention of person promotes the design taste in place, about transparent, suspends in midair, cleverly three-dimensional view is taken in design out of
Feel sense organ, increase place spatial impression, the inspiration imagination is allowed to be permeated with scientific and technological fashion in entire environment.Existing projection screen inconvenience into
Row unreel, be also inconvenient to be wound, to unreel with the projection screen in wrapup procedure carry out tensioning adjust operating efficiency it is low, tensioning
It adjusts inconvenient for operation, and is not easy to the problem of handling the dust on screen.
Utility model content
In view of the deficienciess of the prior art, the utility model aim is to provide a kind of online education projection screen retractable volume machine
Structure is inconvenient to be unreeled, is also inconvenient to be wound to solve prior art projection screen, to unreeling and the throwing in wrapup procedure
Shadow curtain carries out tensioning, and to adjust operating efficiency low, and tensioning adjusts inconvenient for operation, and is not easy to at the dust on screen
The problem of reason.
To achieve the goals above, the utility model is achieved through the following technical solutions: a kind of online education is thrown
Ying Mu retractable volume mechanism, including rack, the first gear frame, the second gear frame, unreeling shaft, unreel roller, winding roller, winding
Axis, tensioning regulating mechanism and dust-extraction unit, the first gear frame left side top central portion and left side bottom side middle part and rack
Right side top central portion is bolted, in the middle part of the second gear frame right side top central portion and right side bottom side and rack
Left side top central portion is bolted, and described unreeling shaft or so end face extends through in the left and right end face top side of rack inside
It is rotatablely connected behind portion with gear hole set by the middle part of in the middle part of the second gear frame right side and the first gear frame left side, and
And grafting is carried out in the middle part of unreeling shaft left side and winding roller right side, the winding roller is in that horizontal line is parallel with roller is unreeled
Distribution, the left outside side end face of Scroll is rotatablely connected with end face in the middle part of winding drum inside, and Scroll or so is held
Face is set in the bottom side of rack with progress grafting, the tensioning regulating mechanism in the middle part of left and right end face bottom side on the inside of rack respectively
Portion, and it is tensioned the top end face that regulating mechanism is located at winding roller, the dust-extraction unit is set in the middle part of rack top end face, described
Regulating mechanism is tensioned by the first belt tensioning drum, the first adjustment axis, first gear, the second adjustment axis, the second belt tensioning drum, the second tooth
Wheel, first hydraulic cylinder, First piston bar, first lifting seat, second hydraulic cylinder, second piston bar and the second lifting seat composition, institute
The first adjustment axis left side is stated through the first belt tensioning drum right side middle part, and in the middle part of first adjustment axis or so end face respectively
It is welded in the middle part of the end face of left and right on the inside of two first gears being arranged with the first belt tensioning drum or so end face, described second is adjusted
Axis left side is tensioned with second respectively through the second belt tensioning drum right side middle part, and in the middle part of second adjustment axis or so end face
It is welded in the middle part of the end face of left and right on the inside of the second gear of roller or so end face setting, with the in the middle part of the second gear top end face
In the middle part of one gear bottom face intermeshing, First piston bar outer lower end face and first hydraulic cylinder top end face inside middle portion into
Row is slidably connected, and is bolted in the middle part of the first lifting seat bottom face in the middle part of First piston bar top end face, and the
Pass through two root cutting bars of setting and first gear right side middle part in the middle part of one lifting seat left side top central portion and bottom face respectively
It is rotatablely connected with second gear right side middle part, in the middle part of the second piston bar outer lower end and second hydraulic cylinder top end face
Inside is slidably connected, and is bolted in the middle part of the second lifting seat bottom face in the middle part of second piston bar top end face,
And pass through the two root cutting bars and first gear of setting in the middle part of the second lifting seat right side top central portion and right side bottom side respectively
It is rotatablely connected in the middle part of in the middle part of left side and second gear left side, in the middle part of the first belt tensioning drum front end face and second
Tight drum front end Middle face is slidably connected with front end of rack Middle face, and the dust-extraction unit is by shell, suction ventilator, exhaust
Mouth, filter screen, air-suction cover, tapetum, port, baffle and source line group are in the middle part of described suction ventilator or so end face and in shell
Side or so end face top central portion is bolted, and the exhaust outlet is set to housing top end Middle face, the filter screen or so
Grafting is carried out in the middle part of end face and on the inside of shell in the middle part of the bottom side of left and right end face, passes through the intubation of setting in the middle part of the air-suction cover top end face
It is threadedly coupled, is carried out in the middle part of the tapetum top end face and air-suction cover bottom face slotting on the inside of shell bottom face right side central
It connecing, there are two the port spaced sets above in the middle part of air-suction cover bottom face, and the baffle shape is in upward arc, and
And it is welded in the middle part of the bottom face right side central of baffle and interior of shell bottom face, the power supply line bottom face and housing top end
Grafting is carried out in the middle part of right side of face, is bolted in the middle part of shell bottom face left and right ends with rack top end face middle part, institute
Power supply line is stated to be electrically connected with external control switch.
Further, the first hydraulic cylinder, First piston bar and first lifting seat are lived with second hydraulic cylinder, second respectively
The shape size of stopper rod and the second lifting seat is equal, be conducive to simultaneously to the height of the first belt tensioning drum and the second belt tensioning drum into
Row adjustment.
Further, the left side horizontal middle of the first gear frame and the horizontal middle of the second gear frame right side are equal
Spaced set is conducive to there are two gear corresponding with unreeling shaft outer diameter shape size hole above by the left and right end of unreeling shaft
It is placed in the gear hole set by being mounted in the middle part of the second gear frame right side middle part and the first gear frame left side respectively in face.
Further, the surface for unreeling roller and winding roller is equipped with ceramic layer, is beneficial to prevent and unreels roller
It is damaged with the coarse surface to projection screen in just face of winding roller.
Further, the distribution length of the tapetum and the top end face equal length for unreeling roller, are conducive to make villus
Layer clears away the dust on the projection screen unreeled on roller.
Further, the roller that unreels is equal with the winding length scale of roller, is conducive to make to unreel the throwing on roller
The folding and unfolding of shadow curtain is on winding roller.
Further, the suction ventilator model BL-B190B-EC-03 suction ventilator, advantage are noise suction foot.
Further, the first gear and second gear material are stainless steel material, and advantage is with good anti-
Corrosivity.
A kind of online education projection screen retractable volume mechanism of the utility model, by being provided with tensioning regulating mechanism in rack
Bottom end, push First piston bar and second piston bar to move upward or downward respectively by first hydraulic cylinder and second hydraulic cylinder
It is dynamic, to drive first lifting seat and the second lifting seat to move up and down, so that the first belt tensioning drum and second be made to be tensioned rolling
Cylinder is scrolled up and down in the front end face of rack and is moved up and down to the projection screen in rack, when moving upward into drawing
Tightly, it is put when moving down, solves and carry out tensioning with the projection screen in wrapup procedure and adjust that operating efficiency is low to ask to unreeling
Topic sweep falling, and lead to by tapetum by being provided with dust exhaust apparatus in the top end face of rack to the dust on projection screen
It crosses suction ventilator to adsorb dust into shell, makes dust carry out being put together at shell inside bottom left end by baffle, solve
It is not easy to the problem of handling the dust on screen.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign, objects and advantages will become more apparent upon:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the tensioning regulating mechanism structural schematic diagram of the utility model；
Fig. 3 is the dust-extraction unit structural schematic diagram of the utility model；
In figure: rack -1, the first gear frame -2, the second gear frame -3, unreeling shaft -4, unreel roller -5, winding roller -6,
Scroll -7, tensioning regulating mechanism -8, dust-extraction unit -9, the first belt tensioning drum -81, the first adjustment axis -82, first gear -83,
Second adjustment axis -84, the second belt tensioning drum -85, second gear -86, first hydraulic cylinder -87, First piston bar -88, first liter
Seat -89, second hydraulic cylinder -810, second piston bar -811, the second lifting seat -812, shell -91, suction ventilator -92, exhaust are dropped
Mouth -93, filter screen -94, air-suction cover -95, tapetum -96, port -97, baffle -98, power supply line -99.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
Fig. 1, Fig. 2 and Fig. 3 are please referred to, the utility model provides a kind of online education projection screen retractable volume mechanism: including machine
Frame 1, the second gear frame 3, unreeling shaft 4, unreels roller 5, winding roller 6, Scroll 7, tensioning regulating mechanism 8 at first gear frame 2
With dust-extraction unit 9, in the middle part of 2 left side top central portion of the first gear frame and left side bottom side with 1 right side top central portion of rack into
Row is bolted, and is carried out in the middle part of 3 right side top central portion of the second gear frame and right side bottom side with 1 left side top central portion of rack
It is bolted, 4 or so end face of unreeling shaft extends through right with the second gear frame 3 after 1 inside left and right end face top central portion of rack
Gear hole set by the middle part of in the middle part of end face and 2 left side of the first gear frame is rotatablely connected, and 4 left side of unreeling shaft with
It winds and carries out grafting in the middle part of 6 right side of roller, wind roller 6 and unreel roller 5 in horizontal line parallelly distribute on, Scroll 7 is left outside
Side end face is rotatablely connected with winding 6 middle inside end face of roller, and 7 or so end face of Scroll is respectively and on the inside of rack 1
Grafting is carried out in the middle part of the bottom side of left and right end face, tensioning regulating mechanism 8 is set in the middle part of the bottom side of rack 1, and is tensioned regulating mechanism 8
Positioned at the top end face of winding roller 6, dust-extraction unit 9 is set in the middle part of 1 top end face of rack, and tensioning regulating mechanism 8 is by the first tensioning
Roller 81, the first adjustment axis 82, first gear 83, the second adjustment axis 84, the second belt tensioning drum 85, second gear 86, the first liquid
812 groups of cylinder pressure 87, First piston bar 88, first lifting seat 89, second hydraulic cylinder 810, second piston bar 811 and the second lifting seat
At, 82 left side of the first adjustment axis through in the middle part of 81 right side of the first belt tensioning drum, and 82 or so end face of the first adjustment axis
Middle part is welded in the middle part of two first gears, the 83 inside left and right end face of 81 or so end face of the first belt tensioning drum setting respectively,
Second adjustment axis, 84 left side is through in the middle part of 85 right side of the second belt tensioning drum, and in the middle part of 84 or so end face of the second adjustment axis
It is welded respectively in the middle part of the 86 inside left and right end face of second gear of 85 or so end face of the second belt tensioning drum setting, second gear
It is intermeshed in the middle part of 86 top end faces in the middle part of 83 bottom face of first gear, 88 outer lower end face of First piston bar and first hydraulic cylinder
87 top end face inside middle portions are slidably connected, in the middle part of first lifting seat 89 bottom face in the middle part of 88 top end face of First piston bar into
Row is bolted, and in the middle part of 89 left side top central portion of first lifting seat and bottom face respectively by two root cutting bars of setting with
It is rotatablely connected in the middle part of 83 right side of first gear and in the middle part of 86 right side of second gear, 811 outer lower end of second piston bar
It is slidably connected with 810 top end face inside middle portion of second hydraulic cylinder, 812 bottom face of the second lifting seat middle part and second piston bar
It is bolted in the middle part of 811 top end faces, and in the middle part of 812 right side top central portion of the second lifting seat and right side bottom side respectively
By being rotatablely connected in the middle part of two root cutting bars of setting and in the middle part of 83 left side of first gear and 86 left side of second gear, the
Sliding company is carried out in the middle part of one belt tensioning drum, 81 front end face and with 1 front end face of rack middle part in the middle part of 85 front end face of the second belt tensioning drum
It connects, dust-extraction unit 9 is by shell 91, suction ventilator 92, exhaust outlet 93, filter screen 94, air-suction cover 95, tapetum 96, port 97, baffle
98 and power supply line 99 form, carry out bolt company with 91 inside left and right end face top central portion of shell in the middle part of 92 or so end face of suction ventilator
It connects, exhaust outlet 93 is set in the middle part of 91 top end face of shell, in the middle part of 94 or so end face of filter screen and 91 inside left and right end face bottom of shell
Middle side part carries out grafting, passes through in the middle part of 95 top end face of air-suction cover and carries out on the inside of the 91 bottom face right side central of intubation and shell of setting
Be threadedly coupled, carry out grafting in the middle part of 96 top end face of tapetum and 95 bottom face of air-suction cover, 97 spaced set of port there are two with
On in the middle part of air-suction cover 95 bottom face, 98 shape of baffle is in upward arc, and the bottom face right side central of baffle 98 and outer
91 inner bottom Middle face of shell is welded, and 99 bottom face of power supply line and 91 top end face right side central of shell carry out grafting, shell
Be bolted in the middle part of 1 top end face of rack in the middle part of 91 bottom face left and right ends, the control switch of power supply line 99 and outside into
Row electrical connection, first hydraulic cylinder 87, First piston bar 88 and first lifting seat 89 respectively with second hydraulic cylinder 810, second piston
The shape size of bar 811 and the second lifting seat 812 is equal, is conducive to simultaneously to the first belt tensioning drum 81 and the second belt tensioning drum 85
Height be adjusted, between the horizontal middle of 3 right side of left side horizontal middle and the second gear frame of the first gear frame 2 is impartial
Away from more than two gear holes corresponding with 4 outer diameter shape size of unreeling shaft are provided with, be conducive to the left and right end face of unreeling shaft 4
It places and is mounted in the middle part of 3 right side of the second gear frame in gear hole set by the middle part of 2 left side of the first gear frame respectively, put
Scroll cylinder 5 and winding roller 6 surface be equipped with ceramic layer, be beneficial to prevent unreel roller 5 and wind roller 6 just face it is coarse
The surface of projection screen is damaged, the distribution length of tapetum 96 and the top end face equal length for unreeling roller 5 are conducive to make
Tapetum 96 clears away the dust on the projection screen unreeled on roller 5, unreels roller 5 and winds the length scale of roller 6
It is equal, be conducive to make to unreel the projection screen folding and unfolding on roller 5 on winding roller 6,92 model BL-B190B-EC- of suction ventilator
03 suction ventilator, advantage are noise suction foot, and first gear 83 and 86 material of second gear are stainless steel material, advantage be with
Good anticorrosive property.
First hydraulic cylinder described in this patent, hydraulic cylinder are that hydraulic energy is changed into mechanical energy, does straight reciprocating motion
The hydraulic actuator of (or pendulum motion), its structure is simple, reliable operation, when being realized reciprocating motion, can be removed from and be subtracted with it
Speed variator, and there is no drive gap, movement is steady, therefore is used widely in the hydraulic system of various machinery.
When user wants using this patent, the executing agency for controlling projection screen by external controller first is big
Must be electric, so that the projection screen unreeled on roller 5 rotate by unreeling shaft 4 moving down projection screen, and put down
Projection screen and wind roller 6 front end face in the middle part of be fixed, when needing the rate of tension to projection screen to be adjusted, and
First piston bar 88 and second piston bar 811 are driven respectively by the hydraulic oil in first hydraulic cylinder 87 and second hydraulic cylinder 810
It moves up and down, so that First piston bar 88 and second piston bar 811 be made to drive the first lifting seat 89 and the at top respectively
Two lifting seats 812 move up and down, so that first lifting seat 89 and the second lifting seat 812 be made to drive first gear 83 and second
Gear 86 moves up and down, so that first gear 83 and second gear 86 be made to pass through the first adjustment axis 82 and the second adjustment axis 84
The first belt tensioning drum 81 and the second belt tensioning drum 85 is driven to move up and down, and the first belt tensioning drum 81 and the second belt tensioning drum 85
Projection screen while moving up and down with 1 rear end face of rack is scrolled up and down, and tenses projection cloth when scrolling up, to
Projection cloth put and is opened when lower rolling, and is contacted simultaneously by tapetum 96 to projection screen when carrying out putting projection screen
And the dust on projection screen sweep falling, and by suction ventilator 92 electric generation suction by dust by port adsorb into
In shell 91, dust is set to carry out being put together at 91 inside bottom left end of shell by baffle 98.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, for
For those skilled in the art, it is clear that the present invention is not limited to the details of the above exemplary embodiments, and without departing substantially from this
In the case where the spirit or essential attributes of utility model, the utility model can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by institute
Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent elements of the claims
All changes are embraced therein.It should not treat any reference in the claims as limiting related right
It is required that.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of online education projection screen retractable volume mechanism, including rack (1), the first gear frame (2), the second gear frame (3), put
Spool (4) unreels roller (5), winding roller (6) and Scroll (7), it is characterised in that: further include be tensioned regulating mechanism (8) and
It is pushed up in the middle part of dust-extraction unit (9), the first gear frame (2) left side top central portion and left side bottom side with rack (1) right side
Middle side part is bolted, left with rack (1) in the middle part of the second gear frame (3) right side top central portion and right side bottom side
End face top central portion is bolted, and unreeling shaft (4) the left and right end face extends through the left and right end face on the inside of rack (1) and pushes up
It is carried out after middle side part with gear hole set by the middle part of in the middle part of second gear frame (3) right side and first gear frame (2) left side
Rotation connection, and unreeling shaft (4) left side and winding roller (6) right side in the middle part of carry out grafting, the winding roller (6) and
Roller (5) are unreeled in horizontal line parallelly distribute on, the left outside side end face of the Scroll (7) and winding roller (6) middle inside end face
It is rotatablely connected, and Scroll (7) left and right end face carries out grafting with left and right end face bottom side middle part on the inside of rack (1) respectively,
Tensioning regulating mechanism (8) is set in the middle part of the bottom side of rack (1), and is tensioned regulating mechanism (8) and is located at winding roller (6)
Top end face, the dust-extraction unit (9) is set in the middle part of rack (1) top end face, and the tensioning regulating mechanism (8) is tensioned by first
Roller (81), the first adjustment axis (82), first gear (83), the second adjustment axis (84), the second belt tensioning drum (85), second gear
(86), first hydraulic cylinder (87), First piston bar (88), first lifting seat (89), second hydraulic cylinder (810), second piston bar
(811) it is formed with the second lifting seat (812), the first adjustment axis (82) left side is through the first belt tensioning drum (81) right end
Middle face, and two with the setting of the first belt tensioning drum (81) left and right end face respectively in the middle part of the first adjustment axis (82) left and right end face
It is welded in the middle part of the end face of left and right on the inside of first gear (83), the second adjustment axis (84) left side is rolled through the second tensioning
Cylinder (85) right side in the middle part of, and the second adjustment axis (84) left and right end face in the middle part of respectively with the second belt tensioning drum (85) left and right end face
It is welded in the middle part of the end face of left and right on the inside of the second gear (86) of setting, second gear (86) the top end face middle part and the first tooth
It takes turns and is intermeshed in the middle part of (83) bottom face, in First piston bar (88) the outer lower end face and first hydraulic cylinder (87) top end face
It is slidably connected on the inside of portion, is carried out in the middle part of first lifting seat (89) bottom face in the middle part of First piston bar (88) top end face
Be bolted, and in the middle part of first lifting seat (89) left side top central portion and bottom face respectively by two root cutting bars of setting with
It is rotatablely connected in the middle part of first gear (83) right side and in the middle part of second gear (86) right side, the second piston bar
(811) outer lower end is slidably connected with second hydraulic cylinder (810) top end face inside middle portion, second lifting seat (812)
It is bolted in the middle part of bottom face with second piston bar (811) top end face middle part, and the second lifting seat (812) right side is pushed up
Pass through two root cutting bars of setting and first gear (83) left side middle part and the second tooth in the middle part of middle side part and right side bottom side respectively
Wheel is rotatablely connected in the middle part of (86) left side, the first belt tensioning drum (81) front end face middle part and the second belt tensioning drum (85)
It is slidably connected in the middle part of front end face with rack (1) front end face middle part, the dust-extraction unit (9) is by shell (91), suction ventilator
(92), exhaust outlet (93), filter screen (94), air-suction cover (95), tapetum (96), port (97), baffle (98) and power supply line
(99) it forms, carries out bolt company with left and right end face top central portion on the inside of shell (91) in the middle part of suction ventilator (92) the left and right end face
It connects, the exhaust outlet (93) is set in the middle part of shell (91) top end face, filter screen (94) the left and right end face middle part and shell
(91) grafting is carried out in the middle part of the left and right end face bottom side of inside, passes through the intubation and shell of setting in the middle part of air-suction cover (95) top end face
(91) it is threadedly coupled on the inside of bottom face right side central, in the middle part of tapetum (96) top end face and air-suction cover (95) bottom face
Grafting is carried out, there are two above in air-suction cover (95) bottom face middle part, the baffle (98) for port (97) spaced set
Shape is in upward arc, and the bottom face right side central of baffle (98) is welded with shell (91) inner bottom Middle face
It connects, power supply line (99) bottom face and shell (91) top end face right side central carry out grafting, and shell (91) bottom face is left
It is bolted in the middle part of right both ends with rack (1) top end face middle part, the power supply line (99) and external control switch carry out
Electrical connection.
2. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described first is hydraulic
Cylinder (87), First piston bar (88) and first lifting seat (89) respectively with second hydraulic cylinder (810), second piston bar (811) and
The shape size of second lifting seat (812) is equal.
3. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: first gear
The left side horizontal middle of frame (2) and the horizontal middle of second gear frame (3) right side be equidistantly provided with it is more than two with
The corresponding gear hole of unreeling shaft (4) outer diameter shape size.
4. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described to unreel roller
(5) and the surface of winding roller (6) is equipped with ceramic layer.
5. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: the tapetum
(96) distribution length and the top end face equal length for unreeling roller (5).
6. a kind of online education projection screen retractable volume mechanism according to claim 1, it is characterised in that: described to unreel roller
(5) and the length scale of winding roller (6) is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822211109.6U CN209086660U (en) | 2018-12-26 | 2018-12-26 | A kind of online education projection screen retractable volume mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822211109.6U CN209086660U (en) | 2018-12-26 | 2018-12-26 | A kind of online education projection screen retractable volume mechanism |
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| Publication Number | Publication Date |
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| CN209086660U true CN209086660U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822211109.6U Expired - Fee Related CN209086660U (en) | 2018-12-26 | 2018-12-26 | A kind of online education projection screen retractable volume mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026888A (en) * | 2019-12-26 | 2020-04-17 | 成都师范学院 | Library intelligent reading system based on computer |
| CN112116862A (en) * | 2020-09-29 | 2020-12-22 | 张灯 | Diversified display device of city planning overall arrangement |
| CN112489503A (en) * | 2020-12-08 | 2021-03-12 | 郭娅 | English training auxiliary system |
-
2018
- 2018-12-26 CN CN201822211109.6U patent/CN209086660U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111026888A (en) * | 2019-12-26 | 2020-04-17 | 成都师范学院 | Library intelligent reading system based on computer |
| CN111026888B (en) * | 2019-12-26 | 2023-04-07 | 成都师范学院 | Library intelligent reading system based on computer |
| CN112116862A (en) * | 2020-09-29 | 2020-12-22 | 张灯 | Diversified display device of city planning overall arrangement |
| CN112116862B (en) * | 2020-09-29 | 2021-11-23 | 张灯 | Diversified display device of city planning overall arrangement |
| CN112489503A (en) * | 2020-12-08 | 2021-03-12 | 郭娅 | English training auxiliary system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190709 Termination date: 20211226 |