CN112433436A - Projection screen with cleaning function - Google Patents
Projection screen with cleaning function Download PDFInfo
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- CN112433436A CN112433436A CN202011248492.8A CN202011248492A CN112433436A CN 112433436 A CN112433436 A CN 112433436A CN 202011248492 A CN202011248492 A CN 202011248492A CN 112433436 A CN112433436 A CN 112433436A
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- rod
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- 238000004140 cleaning Methods 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000010405 clearance mechanism Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 15
- 239000000428 dust Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000002337 anti-port Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
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- 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
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The invention relates to a projection screen with a cleaning function, which comprises a fixed plate, an expansion bolt, a shell, a motor, a rotating shaft, a curtain, a weight block, a cleaning mechanism and a pressing mechanism, wherein the shell is arranged on the fixed plate, the motor is horizontally arranged in the shell, the rotating shaft is arranged on the motor, one end of the curtain is connected with the rotating shaft, the weight block is arranged at the other end of the curtain, an opening is arranged on the shell, the cleaning mechanism is arranged at the opening of the shell, and the pressing mechanism is arranged on the fixed plate. This hold-down mechanism adopts flexible centre gripping, has avoided the curtain to damage, realizes the protection to the curtain.
Description
Technical Field
The invention relates to a projection screen with a cleaning function.
Background
Projection screens are generally classified into a reflective type for front projection and a transmissive type for rear projection, and include a wall-mounted screen, a bracket screen, a folding screen, a floor-pulling screen, a frame screen, and the like, and are widely used in home theaters.
The present projection curtain for home theater does not generally set up better cleaning device, in case pile up the dust on the curtain, causes the definition inadequately easily, influences and sees the shadow effect, and to the clearance of curtain, generally clears up through the manual work use brush, consumes great manpower, and the projection curtain that has now simultaneously generally does not set up clamping mechanism, under the blowing of air conditioner or fan, the curtain can produce and float, influences and sees the shadow effect.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the projection screen with the cleaning function is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a projection screen with a cleaning function comprises a fixed plate, expansion bolts, a shell, a motor, a rotating shaft, a screen, a weight block, a cleaning mechanism and a pressing mechanism, wherein the expansion bolts are arranged on the fixed plate, the shell is cylindrical, the motor is horizontally arranged in the shell, the rotating shaft is installed on the motor and is coaxially arranged with the shell, one end of the screen is connected with the rotating shaft, the weight block is arranged at the other end of the screen, the screen is wound on the rotating shaft, an opening is formed in the shell, the cleaning mechanism is arranged at the opening of the shell, and the pressing mechanism is arranged on the fixed plate;
the cleaning mechanism comprises a hairbrush, a positioning assembly and a connecting assembly, the positioning assembly comprises a positioning block, a positioning rod and a first spring, the positioning block is arranged on a shell, the positioning rod penetrates through the positioning block, the positioning rod is connected with the positioning block in a sliding mode, the hairbrush is arranged at one end of the positioning rod, the hairbrush is abutted to a curtain, the first spring is sleeved on the positioning rod, the first spring is positioned between the hairbrush and the positioning block, one end of the first spring is connected with the positioning block, the other end of the first spring is connected with one end, close to the hairbrush, of the positioning rod, the connecting assembly comprises a sleeve shell, a clamping rod and a locking unit, the sleeve shell is arranged on the hairbrush, the clamping rod is arranged on the positioning rod, the sleeve shell is sleeved on the clamping rod, the locking unit comprises a sleeve, a wedge block, a second spring, one end of the wedge block is positioned in the sleeve, the other end of the wedge block extends out of the sleeve, the wedge block is connected with the sleeve in a sliding mode, a through hole is formed in the clamping rod, one end, extending out of the sleeve, of the wedge block penetrates through the sleeve and the through hole, the second spring is arranged in the sleeve, one end of the second spring is connected with the sleeve, the other end of the second spring is connected with the wedge block, the electromagnet is arranged in the sleeve, the permanent magnet is arranged on the wedge block, and the permanent magnet and the electromagnet are arranged oppositely;
the pressing mechanism comprises two pressing components which are respectively arranged on two sides of a fixed plate, the pressing components comprise a pressing plate and a pressing unit, the pressing unit comprises an air cylinder, a fixed block, a rotating rod, a pressing block, a pressing rod and a third spring, the fixed block is arranged on the fixed plate, the middle part of the rotating rod is hinged with the fixed block, a torsional spring is arranged at the hinged position of the rotating rod and the fixed block, the air cylinder is arranged on the fixed plate, the air rod of the air cylinder is abutted against one end of the rotating rod, which is far away from the curtain, the pressing block is arranged at one end of the rotating rod, which is far away from the air cylinder, the pressing block is hinged with the rotating rod, the pressing block is provided with a torsional spring at the hinged position of the pressing block and the rotating rod, the pressing rod penetrates through the pressing block, the pressing rod is slidably connected with the pressing block, the pressing plate is arranged at one end of the, one end of the third spring is connected with the pressing block, and the other end of the third spring is connected with the pressing plate.
In order to reduce friction, prevent that the casing from drawing the curtain of flowers, the opening part of casing is equipped with spacing unit, spacing unit includes stopper, fixed axle and cylinder, the stopper sets up in the casing, the fixed axle sets up on the stopper, the fixed axle is parallel with the pivot, the cylinder cover is established on the fixed axle, cylinder and fixed axle key-type connection, the curtain bypasses the cylinder.
In order to realize automatic control, a PLC is arranged in the shell, and the motor, the electromagnet and the cylinder are all electrically connected with the PLC.
In order to realize better fixing effect, the expansion bolts are two, and the two expansion bolts are respectively arranged at two ends of the fixing plate.
In order to better limit the movement of the weight block, a fixing rod is arranged on the fixing plate and penetrates through the weight block, and the fixing rod is connected with the weight block in a sliding manner.
In order to better limit the movement of the weight block, the number of the fixed rods is two, the two fixed rods are respectively arranged at two ends of the fixed plate, and the two fixed rods respectively penetrate through two ends of the weight block.
In order to better position the brush, the number of the positioning assemblies is two, and the two positioning assemblies are respectively arranged on two sides of the shell.
In order to realize better compressing effect to the curtain, compress tightly the unit and have two, two compress tightly the unit and set up respectively at the both ends of clamp plate.
For better cleaning, the first spring is in a compressed state.
For a better locking effect, the second spring is in a compressed state.
The projection screen with the cleaning function has the advantages that the screen is cleaned through the cleaning mechanism, the two sides of the screen are pressed through the pressing mechanism, compared with the existing cleaning mechanism, the cleaning mechanism can be used for dismounting the hairbrush through simple pressing, tools such as a screwdriver and an electric drill are avoided, dismounting is convenient, compared with the existing pressing mechanism, the pressing mechanism adopts flexible clamping, damage to the screen is avoided, and protection is achieved for the screen.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of a projection screen with a cleaning function according to the present invention;
FIG. 2 is a schematic structural diagram of a projection screen with a cleaning function according to the present invention;
FIG. 3 is a schematic structural diagram of a cleaning mechanism of the projection screen with cleaning function of the invention;
FIG. 4 is a schematic view of a pressing mechanism of the projection screen with cleaning function according to the present invention;
in the figure: 1. the device comprises a fixing plate, 2 expansion bolts, 3 a shell, 4 a motor, 5 a rotating shaft, 6 a curtain, 7 a weight, 8 a brush, 9 a positioning block, 10 a positioning rod, 11 a first spring, 12 a sleeve, 13 a clamping rod, 14 a sleeve, 15 a wedge block, 16 a second spring, 17 an electromagnet, 18 a permanent magnet, 19 an air cylinder, 20 a fixing block, 21 a rotating rod, 22 a pressing block, 23 a pressing rod, 24 a third spring, 25 a limiting block, 26 a fixing shaft, 27 a roller and 28 a fixing rod.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-2, a projection screen with a cleaning function includes a fixing plate 1, an expansion bolt 2, a housing 3, a motor 4, a rotating shaft 5, a screen 6, a weight 7, a cleaning mechanism and a pressing mechanism, wherein the expansion bolt 2 is disposed on the fixing plate 1, the housing 3 is cylindrical, the motor 4 is horizontally disposed in the housing 3, the rotating shaft 5 is mounted on the motor 4, the rotating shaft 5 is coaxially disposed with the housing 3, one end of the screen 6 is connected to the rotating shaft 5, the weight 7 is disposed at the other end of the screen 6, the screen 6 is wound on the rotating shaft 5, an opening is disposed on the housing 3, the cleaning mechanism is disposed at the opening of the housing 3, and the pressing mechanism is disposed on the fixing plate 1;
when the device uses, fix fixed plate 1 on the wall body through expansion bolts 2, driving motor 4, motor 4 drive pivot 5 is rotatory, 5 drives of pivot are around the curtain 6 of establishing, thereby emit curtain 6, under the action of gravity of pouring weight 7, curtain 6 is at the in-process of emitting, can be flare-outed, compress tightly the both sides of curtain 6 through hold-down mechanism, thereby make whole curtain 6 under pouring weight 7 and hold-down mechanism's effect, keep fixed taut state, avoid drifting of curtain 6, the sight shadow effect has been improved, clear up curtain 6 after using at every turn through clearance mechanism, avoid the dust to pile up, realize better sight shadow effect, the life of curtain 6 has also been improved.
When curtain 6 is withdrawed to needs, only need reverse operation motor 4, 5 antiport of motor 4 drive pivot, pivot 5 drive curtain 6 is around pivot 5 again to withdraw curtain 6 in the casing 3, realize the protection to curtain 6.
Here, the weight 7 is fitted over the fixing rod 28 so that the weight 7 can move only in the axial direction of the fixing rod 28, thereby limiting the movement of the weight 7.
Here, the curtain 6 bypasses the roller 27 so that the curtain 6 is prevented from contacting the opening of the housing 3 when the curtain 6 is moved out of and retracted into the housing, thereby preventing the curtain 6 from being scratched and protecting the curtain 6.
In order to reduce friction, prevent that casing 3 from drawing curtain 6, the opening part of casing 3 is equipped with spacing unit, spacing unit includes stopper 25, fixed axle 26 and cylinder 27, stopper 25 sets up in casing 3, fixed axle 26 sets up on stopper 25, fixed axle 26 is parallel with pivot 5, cylinder 27 cover is established on fixed axle 26, cylinder 27 and the 26 key-type connections of fixed axle, curtain 6 bypasses cylinder 27.
In order to achieve a better fixing effect, the expansion bolts 2 are two, and the two expansion bolts 2 are respectively arranged at two ends of the fixing plate 1.
In order to better limit the movement of the weight 7, a fixing rod 28 is arranged on the fixing plate 1, the fixing rod 28 penetrates through the weight 7, and the fixing rod 28 is connected with the weight 7 in a sliding manner.
In order to better limit the movement of the weight 7, there are two fixing rods 28, two fixing rods 28 are respectively arranged at two ends of the fixing plate 1, and two fixing rods 28 respectively penetrate through two ends of the weight 7.
As shown in fig. 3, the cleaning mechanism includes a brush 8, a positioning assembly and a connecting assembly, the positioning assembly includes a positioning block 9, a positioning rod 10 and a first spring 11, the positioning block 9 is disposed on the housing 3, the positioning rod 10 passes through the positioning block 9, the positioning rod 10 is slidably connected with the positioning block 9, the brush 8 is disposed at one end of the positioning rod 10, the brush 8 abuts against the curtain 6, the first spring 11 is sleeved on the positioning rod 10, the first spring 11 is disposed between the brush 8 and the positioning block 9, one end of the first spring 11 is connected with the positioning block 9, the other end of the first spring 11 is connected with one end of the positioning rod 10 close to the brush 8, the connecting assembly includes a sleeve 12, a clamping rod 13 and a locking unit, the sleeve 12 is disposed on the brush 8, the clamping rod 13 is disposed on the positioning rod 10, the sleeve 12 is sleeved on the clamping rod 13, the locking unit comprises a sleeve 14, a wedge block 15, a second spring 16, an electromagnet 17 and a permanent magnet 18, wherein the sleeve 14 is arranged on a sleeve 12, one end of the wedge block 15 is positioned in the sleeve 14, the other end of the wedge block 15 extends out of the sleeve 14, the wedge block 15 is in sliding connection with the sleeve 14, a through hole is formed in the clamping rod 13, one end of the wedge block 15 extending out of the sleeve 14 penetrates through the sleeve 12 and the through hole, the second spring 16 is arranged in the sleeve 14, one end of the second spring 16 is connected with the sleeve 14, the other end of the second spring 16 is connected with the wedge block 15, the electromagnet 17 is arranged in the sleeve 14, the permanent magnet 18 is arranged on the wedge block 15, and the permanent magnet 18 is opposite to the electromagnet 17;
here, the sleeve 12 is sleeved on the clamping bar 13, at this time, the second spring 16 is in a compressed state, restoring force of the second spring 16 generates outward thrust to the wedge 15, so that the wedge 15 is always clamped in a through hole on the clamping bar 13, thereby the clamping bar 13 and the sleeve 12 cannot be separated, thereby the clamping bar 13 and the sleeve 12 are kept in a locked state, thereby the brush 8 connected with the sleeve 12 is fixed on the positioning rod 10 connected with the clamping bar 13, here, the first spring 11 is in a compressed state, restoring force of the first spring 11 generates outward thrust to the positioning rod 10, the positioning rod 10 generates outward thrust to the clamping bar 13, the clamping bar 13 generates thrust to the sleeve 12, the sleeve 12 generates outward thrust to the brush 8, thereby the brush 8 is tightly attached to the curtain 6, along with the movement of the curtain 6, the brush 8 cleans dust on the curtain 6, thereby dust accumulation is avoided, the definition of viewing the shadow is improved, thereby improving the effect of viewing the shadow.
Here, the pulling force of the weight 7 on the curtain 6 is greater than the restoring force of the first spring 11, so that the curtain 6 can move under the pulling force of the weight 7, and the brush 8 cannot block the movement of the curtain 6.
When the brush 8 is used for a period of time enough to replace the brush 8, the electromagnet 17 is operated, the electromagnet 17 generates suction force, so that the permanent magnet 18 moves towards the electromagnet 17, the permanent magnet 18 drives the wedge 15 to move, so that the wedge 15 moves out of the through hole and the sleeve 12, so that the clamping rod 13 and the sleeve 12 are unlocked, then the sleeve 12 is moved towards the sleeve 12, so that the sleeve 12 is moved away from the clamping rod 13, the brush 8 can be taken down, the second spring 16 is in a compressed state, after the brush 8 is taken down, the electromagnet 17 stops operating, the permanent magnet 18 cannot receive the suction force of the electromagnet 17, under the restoring force of the second spring 16, the wedge 15 moves outwards to return to an initial position, then the sleeve 12 on a new brush 8 is sleeved on the clamping rod 13, the clamping rod 13 abuts against the inclined surface of the wedge 15, then the wedge 15 is driven to move, so that the wedge 15 moves, when the through hole on the clamping rod 13 moves to the wedge 15, the wedge 15 is not blocked by the clamping rod 13, and will be ejected under the action of the restoring force of the second spring 16, so as to be clamped into the through hole again, so that the clamping rod 13 and the sleeve 12 keep the locking state again, and a new brush 8 is fixed on the positioning rod 10, thereby realizing the installation of the brush 8.
For better positioning of the brush 8, there are two positioning assemblies, which are respectively disposed at both sides of the housing 3.
For a better cleaning effect, the first spring 11 is in a compressed state.
For a better locking effect, the second spring 16 is in a compressed state.
As shown in fig. 4, the pressing mechanism includes two pressing components, the two pressing components are respectively disposed on two sides of the fixing plate 1, the pressing component includes a pressing plate 29 and a pressing unit, the pressing unit includes a cylinder 19, a fixing block 20, a rotating rod 21, a pressing block 22, a pressing rod 23 and a third spring 24, the fixing block 20 is disposed on the fixing plate 1, the middle of the rotating rod 21 is hinged to the fixing block 20, a torsion spring is disposed at the hinged position of the rotating rod 21 and the fixing block 20, the cylinder 19 is disposed on the fixing plate 1, one end of the cylinder 19, which is far away from the curtain 6, of the rotating rod 21 is abutted to one end of the pressing block 22, which is far away from the cylinder 19, the pressing block 22 is hinged to the rotating rod 21, the torsion spring is disposed at the hinged position of the pressing block 22 and the rotating rod 21, the pressing rod 23 passes through the pressing block 22, the pressing rod 23 is slidably connected to the pressing block 22, the pressing plate 29 is abutted against the curtain 6, the third spring 24 is sleeved on the pressing rod 23, the third spring 24 is located between the pressing block 22 and the pressing plate 29, one end of the third spring 24 is connected with the pressing block 22, and the other end of the third spring 24 is connected with the pressing plate 29.
When the curtain 6 is released, the PLC controls the operation of the air cylinder 19, the air rod of the air cylinder 19 extends out, so that one end of the rotating rod 21 close to the air cylinder 19 is raised, under the action of a lever principle, the other end of the rotating rod 21 descends, so that the rotating rod 21 drives the pressing block 22 to move downwards, the pressing block 22 drives the third spring 24 to move downwards, the third spring 24 drives the pressing plate 29 to move downwards, so that the pressing plate 29 presses two sides of the curtain 6, the pressing plate 29 abuts against the curtain 6 at the moment and cannot move, along with the movement of the rotating rod 21, the distance between the rotating rod 21 and the pressing plate 29 is reduced, so that the third spring 24 is compressed, the restoring force of the third spring 24 generates outward thrust on the pressing plate 29, and the pressing plate 29 can better press the curtain 6.
When the curtain 6 needs to be retracted, the air cylinder 19 is operated reversely, the air rod of the air cylinder 19 is retracted, the torsion spring at the hinged position of the rotating rod 21 and the fixed block 20 is in a deformation state, the restoring force of the torsion spring generates a pushing force on the rotating rod 21, so that the rotating rod 21 rotates reversely, the rotating rod 21 returns to the initial position, the rotating rod 21 drives the pressing block 22 to rotate reversely, the pressing block 22 drives the third spring 24 to rotate reversely, the third spring 24 drives the pressing plate 29 to rotate reversely, the pressing plate 29 is moved away from the curtain 6, and then the curtain 6 can be retracted.
In order to realize automatic control, a PLC is arranged in the shell 3, and the motor 4, the electromagnet 17 and the air cylinder 19 are all electrically connected with the PLC.
In order to achieve a better pressing effect on the curtain 6, there are two pressing units, and the two pressing units are respectively arranged at two ends of the pressing plate 29.
When the device uses, fix the device on the wall body through expansion bolts 2, realize being connected of brush 8 and locating component through coupling assembling, paste tight curtain 6 through dead brush 8 of locating component, through the operation of PLC control motor 4, realize the removal of curtain 6, thereby clear up curtain 6 through brush 8, avoid the dust to pile up on curtain 6, the sight shadow effect has been improved, compress tightly the both sides of curtain 6 through hold-down mechanism, thereby avoid curtain 6 to wave through pouring weight 7 and hold-down mechanism, the sight shadow effect has been improved.
Compared with the prior art, this projection curtain with clearance function clears up curtain 6 through clearance mechanism, compress tightly the both sides of curtain 6 through hold-down mechanism, compare with current clearance mechanism, this clearance mechanism can realize the dismouting of brush 8 through simple pressing down, the use of instruments such as screwdriver, electric drill has been avoided, convenient dismouting, compare with current hold-down mechanism, this hold-down mechanism adopts flexible centre gripping, avoided curtain 6 to damage, realize the protection to curtain 6.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The projection screen with the cleaning function is characterized by comprising a fixing plate (1), an expansion bolt (2), a shell (3), a motor (4), a rotating shaft (5), a screen (6), a weight block (7), a cleaning mechanism and a pressing mechanism, wherein the expansion bolt (2) is arranged on the fixing plate (1), the shell (3) is cylindrical, the motor (4) is horizontally arranged in the shell (3), the rotating shaft (5) is arranged on the motor (4), the rotating shaft (5) and the shell (3) are coaxially arranged, one end of the screen (6) is connected with the rotating shaft (5), the weight block (7) is arranged at the other end of the screen (6), the screen (6) is wound on the rotating shaft (5), an opening is arranged on the shell (3), and the cleaning mechanism is arranged at the opening of the shell (3), the pressing mechanism is arranged on the fixing plate (1);
clearance mechanism includes brush (8), locating component and coupling assembling, locating component includes locating piece (9), locating lever (10) and first spring (11), locating piece (9) set up on casing (3), locating lever (10) pass locating piece (9), locating lever (10) and locating piece (9) sliding connection, brush (8) set up the one end at locating lever (10), brush (8) support with curtain (6) and lean on, first spring (11) cover is established on locating lever (10), first spring (11) are located between brush (8) and locating piece (9), the one end and the locating piece (9) of first spring (11) are connected, the other end and the locating lever (10) of first spring (11) are close to the one end of brush (8) and are connected, coupling assembling includes cover shell (12), The safety device comprises a clamping rod (13) and a locking unit, wherein a sleeve (12) is arranged on a hairbrush (8), the clamping rod (13) is arranged on a positioning rod (10), the sleeve (12) is sleeved on the clamping rod (13), the locking unit comprises a sleeve (14), a wedge block (15), a second spring (16), an electromagnet (17) and a permanent magnet (18), the sleeve (14) is arranged on the sleeve (12), one end of the wedge block (15) is positioned in the sleeve (14), the other end of the wedge block (15) extends out of the sleeve (14), the wedge block (15) is in sliding connection with the sleeve (14), a through hole is formed in the clamping rod (13), one end of the wedge block (15), which extends out of the sleeve (14), penetrates through the sleeve (12) and the through hole, the second spring (16) is arranged in the sleeve (14), and one end of the second spring (16) is connected with the sleeve (14), the other end of the second spring (16) is connected with the wedge block (15), the electromagnet (17) is arranged in the sleeve (14), the permanent magnet (18) is arranged on the wedge block (15), and the permanent magnet (18) is arranged opposite to the electromagnet (17);
the pressing mechanism comprises two pressing components, the two pressing components are respectively arranged on two sides of the fixed plate (1), the pressing components comprise a pressing plate (29) and a pressing unit, the pressing unit comprises a cylinder (19), a fixed block (20), a rotating rod (21), a pressing block (22), a pressing rod (23) and a third spring (24), the fixed block (20) is arranged on the fixed plate (1), the middle of the rotating rod (21) is hinged to the fixed block (20), the rotating rod (21) is provided with a torsional spring at the hinged position of the fixed block (20), the cylinder (19) is arranged on the fixed plate (1), the air rod of the cylinder (19) is abutted to one end of the rotating rod (21) far away from the curtain (6), the pressing block (22) is arranged at one end of the rotating rod (21) far away from the cylinder (19), the pressing block (22) is hinged to the rotating rod (21), and the pressing block (22) is provided with a torsional spring at the hinged position of the rotating rod (21), the utility model discloses a screen curtain, including depression bar (23), clamp plate (29), press plate (29) and curtain (6), third spring (24) cover is established on depression bar (23), third spring (24) are located between clamp plate (22) and clamp plate (29), the one end and the briquetting (22) of third spring (24) are connected, the other end and the clamp plate (29) of third spring (24) are connected.
2. The projection screen with the cleaning function as claimed in claim 1, wherein a limiting unit is disposed at an opening of the housing (3), the limiting unit includes a limiting block (25), a fixed shaft (26) and a roller (27), the limiting block (25) is disposed in the housing (3), the fixed shaft (26) is disposed on the limiting block (25), the fixed shaft (26) is parallel to the rotating shaft (5), the roller (27) is sleeved on the fixed shaft (26), the roller (27) is connected with the fixed shaft (26) in a key manner, and the roller (27) is bypassed by the curtain (6).
3. The projection screen with the cleaning function as claimed in claim 1, wherein a PLC is disposed in the housing (3), and the motor (4), the electromagnet (17) and the cylinder (19) are electrically connected to the PLC.
4. The projection screen with the cleaning function as claimed in claim 1, wherein there are two expansion bolts (2), and the two expansion bolts (2) are respectively disposed at both ends of the fixing plate (1).
5. The projection screen with the cleaning function as claimed in claim 1, wherein the fixing plate (1) is provided with a fixing rod (28), the fixing rod (28) passes through the weight (7), and the fixing rod (28) is slidably connected with the weight (7).
6. The projection screen with the cleaning function as claimed in claim 5, wherein there are two fixing rods (28), two fixing rods (28) are respectively disposed at two ends of the fixing plate (1), and two fixing rods (28) respectively penetrate two ends of the weight (7).
7. The projection screen with the cleaning function as claimed in claim 1, wherein there are two positioning assemblies, and the two positioning assemblies are respectively disposed at both sides of the housing (3).
8. The projection screen with the cleaning function as claimed in claim 1, wherein there are two pressing units, and the two pressing units are respectively disposed at both ends of the pressing plate (29).
9. The screen of claim 1, wherein the first spring (11) is in a compressed state.
10. The screen of claim 1, wherein the second spring (16) is in compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248492.8A CN112433436A (en) | 2020-11-10 | 2020-11-10 | Projection screen with cleaning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248492.8A CN112433436A (en) | 2020-11-10 | 2020-11-10 | Projection screen with cleaning function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112433436A true CN112433436A (en) | 2021-03-02 |
Family
ID=74700842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011248492.8A Withdrawn CN112433436A (en) | 2020-11-10 | 2020-11-10 | Projection screen with cleaning function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112433436A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974330A (en) * | 2021-03-31 | 2021-06-18 | 防城港市万店科技有限公司 | Ordering equipment for restaurant |
| CN115164006A (en) * | 2022-07-05 | 2022-10-11 | 淮阴师范学院 | Shafting locking mechanism based on optical measurement equipment |
-
2020
- 2020-11-10 CN CN202011248492.8A patent/CN112433436A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974330A (en) * | 2021-03-31 | 2021-06-18 | 防城港市万店科技有限公司 | Ordering equipment for restaurant |
| CN115164006A (en) * | 2022-07-05 | 2022-10-11 | 淮阴师范学院 | Shafting locking mechanism based on optical measurement equipment |
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Application publication date: 20210302 |
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| WW01 | Invention patent application withdrawn after publication |