CN208156408U - A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism - Google Patents
A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism Download PDFInfo
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- CN208156408U CN208156408U CN201820629400.2U CN201820629400U CN208156408U CN 208156408 U CN208156408 U CN 208156408U CN 201820629400 U CN201820629400 U CN 201820629400U CN 208156408 U CN208156408 U CN 208156408U
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- spring
- sliding
- hole
- projection screen
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- 230000007246 mechanism Effects 0.000 title claims abstract description 33
- 239000003381 stabilizer Substances 0.000 claims description 30
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The utility model relates to a kind of height adjustment mechanism and with the projection screen of the height adjustment mechanism, belong to projection screen technical field, it is characterised in that：Including axle sleeve, bracket lifting set, be fixed on axle sleeve；Lifting set is slidably arranged in the upper end of axle sleeve along the vertical direction；The side of axle sleeve offers through-hole, and the side for going up and down set offers the multiple positioning holes to match with the through-hole, and multiple positioning holes are vertically spaced setting；The first spring, plectrum and bayonet lock are provided between bracket and axle sleeve；One end of plectrum is hinged on bracket, and the other end stretches out outside bracket；Hole sliding plug is passed through in the positioning hole of lifting set in bayonet lock one end, and the other end is equipped with the step between plectrum and the first spring, and step, which is greater than, passes through hole；One end of first spring is connected on bracket, and the other end is connected to the end face of step.The utility model has the beneficial effects that：Structure is simple, and operation is extremely convenient, convenient for adjusting the height of curtain according to the actual situation.
Description
Technical field
The utility model relates to projection screen technical fields, more particularly to a kind of height adjustment mechanism and have the height
The projection screen of regulating mechanism.
Background technique
Height adjustment mechanism and projection screen with the height adjustment mechanism are used in film, office, home theater, big
It is widely used for showing the tool of image, video file in the occasions such as type meeting.
Existing projector is generally divided into fixed and packaged type using curtain, fixed to project commonly used in family, throws
For shadow effect because environment is fixed, general effect is relatively good, the disadvantage is that it is irremovable, it is more demanding to use environment.Packaged type curtain
Cloth is divided into indoor/outdoor using two kinds, and the common disadvantage of the two is that assembling is inconvenient, the relatively outdoor use of the assembling of indoor curtain
Curtain is more convenient, but lighter in weight, and wind resistance is poor.Outdoor curtain assembling is inconvenient, and weight is big, inconvenient to carry, but wind resistance
Relatively preferably, and often it needs according to field condition, to adjust the height of curtain, structure is complicated for existing adjustment, inconvenient for operation.Needle
To problem above, the utility model proposes solutions.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of height adjustment for being conveniently adjusted height
Mechanism and projection screen with the height adjustment mechanism.
The purpose of this utility model is achieved through the following technical solutions：A kind of height adjustment mechanism, feature exist
In：Including axle sleeve, bracket lifting set, be fixed on axle sleeve；The lifting set is slidably arranged in the upper of axle sleeve along the vertical direction
End；The side of the axle sleeve offers through-hole, and the side for going up and down set offers the multiple positioning holes to match with the through-hole, more
A positioning hole is vertically spaced setting；The first spring, plectrum and bayonet lock are provided between the bracket and axle sleeve；The plectrum
One end is hinged on bracket, and the other end stretches out outside bracket；It is offered on plectrum and passes through hole；It is sliding that hole is passed through in described bayonet lock one end
In the dynamic positioning hole for being plugged on lifting set, the other end is equipped with the step between plectrum and the first spring, and step, which is greater than, to be passed through
Hole；One end of first spring is connected on bracket, and the other end is connected to the end face of step.
Preferably, it is provided with bushing between the axle sleeve and lifting set, is offered on bushing corresponding with positioning hole logical
Hole.
A kind of projection screen, it is characterised in that：Include height adjustment mechanism described in any of the above-described technical solution.
Preferably, the axle sleeve lower end is symmetrical arranged there are two support leg mechanism；The support leg mechanism includes stabilizer blade, sliding drawing
Bar and linking arm；First sliding groove is offered on the stabilizer blade, sliding is provided with the first sliding block in first sliding groove；The sliding tie rod
One end and the first sliding block it is hinged, the other end is hinged with axle sleeve；Third spring, one end of third spring are provided in the stabilizer blade
It is fixed on stabilizer blade, the other end is fixed on the one end of the first sliding block far from sliding tie rod；One end of the linking arm and stabilizer blade are cut with scissors
It connects, the other end is hinged with axle sleeve；The lower section of sliding tie rod is arranged in the linking arm；The side of first sliding block offers blind
Hole is equipped with the 4th spring and locking pin in blind hole；One end of the locking pin is plugged in blind hole, and the other end is pierced by stabilizer blade；
4th spring is connected between locking pin end face and blind hole bottom surface.
Preferably, connecting rod is fixedly installed at least one described linking arm, one end rotation of the connecting rod is provided with rolling
Wheel.
Preferably, there are two the height adjustment mechanism settings；The upper end of two lifting sets is fixedly installed respectively
Main shaft；Curtain is provided between two main shafts, the both ends of curtain are affixed with two main shafts respectively.
Preferably, it is fixedly installed positioning sleeve, positioning sleeve lower end closed in the lifting set, upper end is equipped with and protrudes from axle sleeve
Positioning convex platform；The main shaft lower end is plugged in positioning sleeve；The side of the positioning convex platform is bolted with holding screw；It is described tight
Determine screw to be plugged on main shaft across positioning convex platform.
Preferably, shear arm is provided between two axle sleeves；The top of the shear arm is sliding with two axle sleeves respectively
Dynamic connection, glide direction is vertical direction, and the bottom of shear arm is fixedly connected with two axle sleeves respectively.
Preferably, it is hinged with the second sliding block at the top of the shear arm, is offered on axle sleeve and the second sliding block matched
Two sliding slots；Lock sheet and second spring are provided on axle sleeve；The second spring and axle sleeve are affixed；The middle part of the lock sheet with
Axle sleeve is connected by a hinge, and one end of lock sheet and the free end of second spring are affixed, and the other end is stuck in the outer of the second sliding block
Circle；The end of the lock sheet is equipped with the inclined-plane of the second sliding block of guidance.
Preferably, the consistent left strainer of structure and right strainer are respectively arranged on two main shafts；It is described
Left strainer includes left tensioner arm and left nutted rod, and right strainer includes right tensioner arm and right nutted rod；The left tensioning
Arm is stuck on main shaft；Third sliding slot is offered on the left tensioner arm, one end of left nutted rod is slidably arranged in third sliding slot,
And the 5th spring between left tensioning rod end surface and third sliding slot inner wall is provided in third sliding slot；The left nutted rod with
Strut is provided between right nutted rod；The free end of the left nutted rod and right nutted rod is connected to the both ends of strut.
The utility model has the beneficial effects that：When adjusting height, plectrum only need to be stirred, so that bayonet lock is detached from lifting set
Positioning hole, i.e., slidably lifting set when sliding into the positioning hole of next height wait go up and down set, is decontroled and is dialled to realize that height adjusts
Piece completes adjustment movement so that bayonet lock is stuck in positioning hole；Structure is simple, and operation is extremely convenient, convenient for adjusting according to the actual situation
The height of whole curtain.
Detailed description of the invention
Fig. 1 is the three-dimensional structure diagram of the utility model embodiment；
Fig. 2 is the cross-sectional view of the utility model embodiment；
Fig. 3 is the structural schematic diagram of plectrum and bayonet lock；
Fig. 4 is structural schematic diagram when projection screen is unfolded；
Fig. 5 is structural schematic diagram when projection screen folds；
Fig. 6 is structural schematic diagram when support leg mechanism is unfolded；
Fig. 7 is structural schematic diagram when support leg mechanism folds；
Fig. 8 is the schematic diagram of internal structure of support leg mechanism；
Fig. 9 is the schematic diagram of internal structure of sliding tie rod；
Figure 10 is the structural schematic diagram of shear arm；
Figure 11 is the cross-sectional view of shear arm；
Figure 12 is the schematic perspective view of strainer；
Figure 13 is the main view of strainer；
In figure：11- axle sleeve, 12- lifting set, 13- bracket, 14- positioning hole, the first spring of 15-, 16- plectrum, 17- bayonet lock,
18- passes through hole, 19- step,
21- bushing, 22- main shaft, 23- curtain, 24- positioning sleeve, 25- positioning convex platform, 26- holding screw,
31- stabilizer blade, 32- sliding tie rod, 33- linking arm, 34- first sliding groove, the first sliding block of 35-, 36- third spring, 37-
Locking pin, 38- blind hole, 39- idler wheel,
41- shear arm, the second sliding block of 42-, 43- second sliding slot, 44- lock sheet, 45- connecting rod, the 4th spring of 46-, 47-
Two springs, 48- mounting hole,
The left tensioner arm of 51-, the left nutted rod of 52-, 53- third card slot, the 5th spring of 54-, 56- strut, 57- spacer pin, 58-
Gum cover, the 4th card slot of 59-.
Specific embodiment
The utility model is further described with reference to the accompanying drawing, but the protection scope of the utility model is not limited to
It is as described below.
As shown in figure 1 to figure 13, a kind of height adjustment mechanism, it is characterised in that：Including axle sleeve 11, lifting set 12, fix
Bracket 13 on axle sleeve 11；The lifting set 12 is slidably arranged in the upper end of axle sleeve 11 along the vertical direction；The axle sleeve 11
Side offers through-hole, and the side of lifting set 12 offers the multiple positioning holes 14 to match with the through-hole, multiple positioning holes
14 vertically interval settings；The first spring 15, plectrum 16 and bayonet lock 17 are provided between the bracket 13 and axle sleeve 11；Described group
One end of piece 16 is hinged on bracket 13, and the other end stretches out outside bracket 13；It is offered on plectrum 16 and passes through hole 18；The bayonet lock 17
18 sliding plug of hole is passed through in the positioning hole 14 of lifting set 12 in one end, and the other end, which is equipped with, is located at plectrum 16 and the first spring
Step 19 between 15, step 19, which is greater than, passes through hole 18；One end of first spring 15 is connected on bracket 13, and the other end connects
It connects in the end face of step 19.
One end of first spring 15 is fixedly connected on the inside of bracket 13, and the other end is resisted against on step 19, the first spring
15 be compressed spring, and the step 19 of plectrum 16 is between the first spring 15 and plectrum 16, when pulling plectrum 16 outward, on
The struck side stated is the one end for stirring plectrum 16, and plectrum 16 can compress the first spring 15, and stretches out lifting set 12, adjustment lifting set
12 in place after, decontrol the first spring 15, plectrum 16 resets under the elastic force of the first spring 15, easy to operate.In addition to this, may be used also
First spring 15 is arranged between axle sleeve 11 and plectrum 16, then the first spring 15 is compressed spring, needs to press when stirring and dial
Moved end.Hole 18 of passing through in the present embodiment is through slot.
Such as Fig. 2, the section of lifting set 12 and axle sleeve 11 be it is rectangular, be convenient for aperture, the positioning on lifting set 12 and axle sleeve 11
14 size of hole is the same, the spacing between adjacent positioning hole 14 is equal；The insertion end of bayonet lock 17 can open up falling more than or equal to 45 °
Angle or fillet, play the guiding role, and facilitate insertion into.
Above-mentioned 16 hinge joint of plectrum is located at end and the most preferred embodiment of plectrum 16, in addition to this, can also will be hinged
Point is arranged at middle part, between bayonet lock 17 and struck side；If being arranged the first spring 15 between boss and bracket 13, dial
First spring 15 is extension spring, needs to press struck side when stirring, it is made to draw high the first spring 15；If the first spring 15 is set
It sets between axle sleeve 11 and plectrum 16, then the first spring 15 is compressed spring, and the dynamic struck side of layback outward is needed when stirring.
Above-mentioned bracket 13 can be hood, and the first spring 15, plectrum 16 and bayonet lock 17 are provide with, more beautiful succinct,
Be conducive to sell, dust-proof effect can also be played.
Such as Fig. 2, it is provided with bushing 21 between the axle sleeve 11 and lifting set 12, is offered on bushing 21 and 14 phase of positioning hole
Corresponding through-hole.The material of bushing 21 is preferably the plastics with certain decrement, such as polyurethane plastics.Bushing 21 is fillable
Gap between axle sleeve 11 and lifting set 12, compensates mismachining tolerance, and can provide appropriate damping, if having certain need to fluency
It asks, the plastics that friction is small such as polytetrafluoroethylplastic plastic can be used, so that more smooth steady when sliding lifting set 12.
Such as Fig. 4, a kind of projection screen 23, it is characterised in that：Include above-mentioned height adjustment mechanism.
11 lower end of axle sleeve is arranged symmetrically, and there are two support leg mechanisms；Such as Fig. 6, the support leg mechanism includes stabilizer blade 31, slides
Dynamic pull rod 32 and linking arm 33；First sliding groove 34 is offered on the stabilizer blade 31, it is sliding to be provided with first for sliding in first sliding groove 34
Block 35；One end of the sliding tie rod 32 and the first sliding block 35 are hinged, and the other end and axle sleeve 11 are hinged；Setting in the stabilizer blade 31
There is third spring, one end of third spring is fixed on stabilizer blade 31, and the other end is fixed on the first sliding block 35 far from sliding tie rod 32
One end；One end of the linking arm 33 and stabilizer blade 31 are hinged, and the other end and axle sleeve 11 are hinged；The linking arm 33 is arranged in cunning
The lower section of dynamic pull rod 32；The side of first sliding block 35 offers blind hole 38, and the 4th spring 46 and lock are equipped in blind hole 38
Rationed marketing 37；One end of the locking pin 37 is plugged in blind hole 38, and the other end is pierced by stabilizer blade 31；4th spring 46 is connected to
Between 38 bottom surface of 37 end face of locking pin and blind hole.
The stabilizer blade 31 of unfolded state, such as Fig. 6, Fig. 8, locking pin 37 protrudes from stabilizer blade 31, prevents sliding tie rod 32 from rotating, makes
It obtains the expansion of stabilizer blade 31 to stablize, and third spring 36 is extension spring, can give the pulling force of the first sliding block 35 outward, so that lock
Rationed marketing 37 is tightly abutted against the inner wall of blind hole 38, so that the fixed structure of stabilizer blade 31 is more stable；When folding, such as Fig. 5, Fig. 7, press
Dynamic locking pin 37, one end that above-mentioned locking pin 37 exposes are set as spherical surface, play the guiding role, end and stabilizer blade when locking pin 37
When 31 sides flush, bending sliding tie rod 32 can move inwards automatically under the guiding function of spherical surface, until first sliding groove
34 inner wall, without being pressed locking pin 37 into first sliding groove 34 with hand, the operation is more convenient；Then in bending function and
Under the pulling force collective effect of third spring 36, sliding tie rod 32 is rotated, and linking arm 33 follows rotation, until folding.In addition to making
Except stabilizer blade 31 is more stable when being unfolded, third spring 36 also has the resistance reduced when folding, convenient for folding.
Connecting rod 45 is fixedly installed at least one described linking arm 33, one end rotation of the connecting rod 45 is provided with idler wheel
39.In the present embodiment, one idler wheel 39 of stabilizer blade 31 setting, connecting rod 45 is horizontally disposed, is connected to the middle part of linking arm 33.
When 31 mechanism deploying of stabilizer blade, the least significant end of idler wheel 39 is higher by stabilizer blade 31, will not be with ground face contact；When 31 mechanism of stabilizer blade folds
When, connecting rod can be rotated together with linking arm 33, and idler wheel 39 can protrude from stabilizer blade 31, with ground face contact, carried and thrown convenient for transfer
Shadow curtain 23.
There are two the height adjustment mechanism settings；The upper end of two lifting sets 12 is fixedly installed main shaft respectively
22；Curtain 23 is provided between two main shafts 22, the both ends of curtain 23 are affixed with two main shafts 22 respectively.
It is fixedly installed positioning sleeve 24,24 lower end closed of positioning sleeve in the lifting set 12, upper end is equipped with and protrudes from axle sleeve
11 positioning convex platform 25；22 lower end of main shaft is plugged in positioning sleeve 24；The side of the positioning convex platform 25 is bolted with tightening
Screw 26；The holding screw 26 passes through positioning convex platform 25 and is plugged on main shaft 22.Holding screw 26 plays fixed main shaft 22
Effect when dismantling main shaft 22, only need to unscrew and extract holding screw 26 out, i.e., dismountable main shaft 22 is easy to operate；Positioning sleeve 24 can
It adopts and is screwed between two valve positioning sleeves 24 convenient for molding and processing for two-flap type, screw is arranged on positioning convex platform 25.
Such as Figure 10, Figure 11, shear arm 41 is provided between two axle sleeves 11；The top of the shear arm 41 respectively with
Two axle sleeves 11 are slidably connected, and glide direction is vertical direction, and the bottom of shear arm 41 is fixedly connected with two axle sleeves 11 respectively.
41 structure of shear arm belongs to common stretching structure.The top of the shear arm 41 is hinged with the second sliding block 42, opens on axle sleeve 11
Equipped with the matched second sliding slot 43 of the second sliding block 42；Lock sheet 44 and second spring 47 are provided on axle sleeve 11；Described second
Spring 47 and axle sleeve 11 are affixed；The middle part of the lock sheet 44 is connected by a hinge with axle sleeve 11, and one end of lock sheet 44 with
The free end of second spring 47 is affixed, and the other end is stuck in the outer circle of the second sliding block 42, and the card in semicircle is offered on lock sheet 44
Slot, the second sliding block 42 are stuck in card slot；The second above-mentioned sliding block 42 is preferably cylindric；The end of the lock sheet 44, which is equipped with, draws
Lead the inclined-plane of the second sliding block 42.In open configuration, lock sheet 44 is stuck on the second sliding block 42, prevents the second sliding block 42 to moving up
It is dynamic, prevent shear arm 41 from shrinking；When folding, the fixing end of lock sheet 44 need to be only pressed, second spring 47 is shunk, and 44 turns of lock sheet
Dynamic, free end is detached from the second sliding block 42, and contraction can be realized in shear arm 41, then under the elastic force effect of second spring 47,
Lock sheet 44 resets；When opening, the second sliding block 42 moves down, and under the guiding function on inclined-plane, slides into the card slot of lock sheet 44
It is interior, it can be automatically performed locking, structure is simple, easy to operate.
Such as Figure 12, Figure 13, the consistent left strainer of structure and right tensioning device are respectively arranged on two main shafts 22
Structure；The left strainer includes left tensioner arm 51 and left nutted rod 52, and right strainer includes right tensioner arm and right nutted rod；
The left tensioner arm 51 is stuck on main shaft 22；Third sliding slot is offered on the left tensioner arm 51, one end of left nutted rod 52 is sliding
Dynamic setting is provided with the between left 52 end face of nutted rod and third sliding slot inner wall in third sliding slot, and in third sliding slot
Five springs 54, the 5th spring 54 are compressed spring, and one end of the 5th spring 54 is resisted against the end face of left nutted rod 52, and the other end supports
Lean against the inner wall of third sliding slot；Strut 56 is provided between the left nutted rod 52 and right nutted rod；The left nutted rod 52 with
The free end of right nutted rod is connected to the both ends of strut 56.
When curtain 23 is unfolded, left tensioner arm 51 and right tensioner arm need to be only stuck on two main shafts 22, it then will be left
Tensioner arm 51 and right tensioner arm are inserted in strut 56, under the action of the 5th spring 54, hold out against left tensioner arm 51 and right tensioner arm,
Expansion movement, simple and quick, stable structure can be completed；When curtain 23 folds, left tensioner arm 51 and right need to be only pressed
Tight arm, is inwardly compressed the 5th spring 54, that is, can be taken off strut 56, then removes left tensioner arm 51 and right tensioner arm, folds curtain
23, jackknife action can be completed, structure is simple, and it is convenient to operate, easy to disassemble.It is offered on curtain 23 and the matched peace of tensioner arm
Fill hole 48.The free end difference sliding plug of left nutted rod 52 and right nutted rod can directly take at the both ends of strut 56, disassembly
Strut 56 out, it is easy to disassemble.
One end of the left tensioner arm 51 is holding section, and the other end is contraction flow region；The holding section offers opening direction
The second card slot outwardly, main shaft 22 are located in the second card slot；The contraction flow region is slidably connected with left nutted rod 52.Convenient for a left side is opened
Tight arm 51 is detached from or installs with main shaft 22.
The third card slot 53 communicated with third sliding slot is offered on the left tensioner arm 51, is fixed with card on left nutted rod 52
Spacer pin 57 in third card slot 53.It is connected between spacer pin 57 and left tensioner arm 51 for close-fitting.
The both ends of the strut 56 have been provided with the gum cover 58 of fixed function.One end cap of the gum cover 58 is in left tensioning
52 outer circle of bar, the other end are inserted in strut 56；52 outer circle of left nutted rod axially offers at least one the 4th card slot
59, the 4th card slot 59 extends to the other end from one end of nutted rod, the inner headed face of gum cover 58 and the cooperation of left nutted rod 52 be equipped with
The matched protrusion of 4th card slot 59；4th card slot 59 is preferably one, and the section of the 4th card slot 59 is preferably arc or trapezoidal；Glue
The material of set 58 is rubber.When installation, by 58 sets of gum cover on strut 56 and nutted rod, and gum cover 58 is rotated, makes protrusion and the
Four card slots 59 are detached from, and fixation is realized by the frictional force between protrusion and nutted rod, and limitation nutted rod and strut 56 are rotated, mentioned
The stability of high device；When disassembly, gum cover 58 only need to be rotated, so that protrusion is located in the 4th card slot 59, outside Slideslip gum cover
58, nutted rod is then pushed down again, removes strut 56；Stable structure, it is easy to disassemble.
Such as Fig. 4, Fig. 6, as folded structure graph, main shaft 22, left strainer, right strainer and curtain 23
Independent stored collapsed, volume after folding is small, compact-sized, is readily transported transfer.
Above-mentioned bracket 13, positioning sleeve 24 are all made of engineering plastics material, such as ABS；Main shaft 22 uses hollow metal tube, keeps away
Exempt to generate bending under the pulling force of curtain 23.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, there can be various modifications and variations in the spirit and principles of the utility model, these are equivalent
Variation or replacement etc., are included in the protection scope of the present invention.
Claims (10)
1. a kind of height adjustment mechanism, it is characterised in that：Including axle sleeve, bracket lifting set, be fixed on axle sleeve；The lifting
Set is slidably arranged in the upper end of axle sleeve along the vertical direction；The side of the axle sleeve offers through-hole, and the side for going up and down set offers
The multiple positioning holes to match with the through-hole, multiple positioning holes are vertically spaced setting；It is arranged between the bracket and axle sleeve
There are the first spring, plectrum and bayonet lock；One end of the plectrum is hinged on bracket, and the other end stretches out outside bracket；It is opened up on plectrum
Pass through hole；Hole sliding plug is passed through in the positioning hole of lifting set in described bayonet lock one end, and the other end, which is equipped with, is located at plectrum
With the step between the first spring, step, which is greater than, passes through hole；One end of first spring is connected on bracket, other end connection
In the end face of step.
2. a kind of height adjustment mechanism according to claim 1, it is characterised in that：It is arranged between the axle sleeve and lifting set
There is bushing, through-hole corresponding with positioning hole is offered on bushing.
3. a kind of projection screen, it is characterised in that：Include height adjustment mechanism described in claim 1~2 any one.
4. a kind of projection screen according to claim 3, it is characterised in that：It is propped up there are two being symmetrical arranged the axle sleeve lower end
Foot mechanism；The support leg mechanism includes stabilizer blade, sliding tie rod and linking arm；First sliding groove is offered on the stabilizer blade, first is sliding
Sliding is provided with the first sliding block in slot；One end of the sliding tie rod and the first sliding block are hinged, and the other end is hinged with axle sleeve；It is described
Third spring is provided in stabilizer blade, one end of third spring is fixed on stabilizer blade, and the other end is fixed on the first sliding block far from sliding
One end of pull rod；One end of the linking arm is hinged with stabilizer blade, and the other end is hinged with axle sleeve；The linking arm setting is drawn in sliding
The lower section of bar；The side of first sliding block offers blind hole, and the 4th spring and locking pin are equipped in blind hole；The locking pin
One end be plugged in blind hole, the other end is pierced by stabilizer blade；4th spring is connected between locking pin end face and blind hole bottom surface.
5. a kind of projection screen according to claim 4, it is characterised in that：It is fixedly installed at least one described linking arm
There is connecting rod, one end rotation of the connecting rod is provided with idler wheel.
6. a kind of projection screen according to claim 3, it is characterised in that：There are two the height adjustment mechanism settings；
The upper end of two lifting sets is fixedly installed main shaft respectively；Curtain, the both ends of curtain are provided between two main shafts
It is affixed with two main shafts respectively.
7. a kind of projection screen according to claim 6, it is characterised in that：Positioning is fixedly installed in the lifting set
Set, positioning sleeve lower end closed, upper end are equipped with the positioning convex platform for protruding from axle sleeve；The main shaft lower end is plugged in positioning sleeve；Institute
The side for stating positioning convex platform is bolted with holding screw；The holding screw passes through positioning convex platform and is plugged on main shaft.
8. a kind of projection screen according to claim 6, it is characterised in that：Scissors is provided between two axle sleeves
Arm；The top of the shear arm is slidably connected with two axle sleeves respectively, and glide direction is vertical direction, the bottom difference of shear arm
It is fixedly connected with two axle sleeves.
9. a kind of projection screen according to claim 8, it is characterised in that：It is sliding that second is hinged at the top of the shear arm
Block offers and the matched second sliding slot of the second sliding block on axle sleeve；Lock sheet and second spring are provided on axle sleeve；Described second
Spring is affixed with axle sleeve；The middle part of the lock sheet is connected by a hinge with axle sleeve, and one end of lock sheet and second spring
Free end is affixed, and the other end is stuck in the outer circle of the second sliding block；The end of the lock sheet is equipped with the inclined-plane of the second sliding block of guidance.
10. a kind of projection screen according to claim 6, it is characterised in that：Knot is respectively arranged on two main shafts
The consistent left strainer of structure and right strainer；The left strainer includes left tensioner arm and left nutted rod, right tensioning device
Structure includes right tensioner arm and right nutted rod；The left tensioner arm is stuck on main shaft；Third sliding slot is offered on the left tensioner arm,
One end of left nutted rod is slidably arranged in third sliding slot, and is provided in third sliding slot sliding positioned at left tensioning rod end surface and third
The 5th spring between slot inner wall；Strut is provided between the left nutted rod and right nutted rod；The left nutted rod and the right side
The free end difference sliding plug of tight bar is at the both ends of strut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629400.2U CN208156408U (en) | 2018-04-28 | 2018-04-28 | A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820629400.2U CN208156408U (en) | 2018-04-28 | 2018-04-28 | A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208156408U true CN208156408U (en) | 2018-11-27 |
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ID=64377104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820629400.2U Expired - Fee Related CN208156408U (en) | 2018-04-28 | 2018-04-28 | A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism |
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| Country | Link |
|---|---|
| CN (1) | CN208156408U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412824A (en) * | 2018-04-28 | 2019-11-05 | 四川大源文创科技有限公司 | A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism |
| CN111554132A (en) * | 2020-05-18 | 2020-08-18 | 许昌学院 | Multimedia teaching selection projection instrument |
-
2018
- 2018-04-28 CN CN201820629400.2U patent/CN208156408U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412824A (en) * | 2018-04-28 | 2019-11-05 | 四川大源文创科技有限公司 | A kind of height adjustment mechanism and the projection screen with the height adjustment mechanism |
| CN110412824B (en) * | 2018-04-28 | 2024-05-10 | 四川大源文创科技有限公司 | Height adjusting mechanism and projection curtain with same |
| CN111554132A (en) * | 2020-05-18 | 2020-08-18 | 许昌学院 | Multimedia teaching selection projection instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20181127 |