CN110460793B - LED backlight liquid crystal television - Google Patents
LED backlight liquid crystal television Download PDFInfo
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- CN110460793B CN110460793B CN201910737580.5A CN201910737580A CN110460793B CN 110460793 B CN110460793 B CN 110460793B CN 201910737580 A CN201910737580 A CN 201910737580A CN 110460793 B CN110460793 B CN 110460793B
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- rotating shaft
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
Abstract
The invention discloses a novel LED backlight liquid crystal television which structurally comprises a protective outer frame and a liquid crystal screen, wherein the protective outer frame is arranged on the liquid crystal screen and comprises a protective mechanism, an equidistant telescopic mechanism, a screw rod transmission set, a loop frame and a power mechanism, and compared with the prior art, the novel LED backlight liquid crystal television has the beneficial effects that: need not artificially go to cover the LED LCD screen, based on the characteristic of magnetism principle and clockwork spring, when the LED LCD screen is at the on-state, the electro-magnet also is in the on-state, make the interior book of protection curtain keep away from the LED screen, when the LED LCD screen is at the off-state, the electro-magnet also is in the off-state, the protection curtain covers the LED screen, when idle, can prevent effectively that the LED screen from being infected with dust impurity, avoid when the south wind sky, the screen has dust dirt, thereby prevent that the people from scraping the screen for scraping dirty, fine guard action has to the screen, make the picture definition of screen not influenced.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to an LED backlight liquid crystal television.
Background
The LED is very sensitive to the passing of current, so that the LED can emit light with extremely small current, has long service life and can flicker for a long time without damage, so that the LED is widely used for indicator lamps of electronic products.
The existing LED liquid crystal screen is fixed on a wall in a screw connection mode, the LED screen is exposed in the installation mode, in the south wind, the weather is wet, the surface of the LED screen is wet and is easily contaminated by dust impurities, after the south wind passes, the dust impurities are scaled on the LED screen, the LED screen is difficult to clean, when the LED screen is cleaned, if the cleaning power to scales is too large, the screen is easy to scratch, the picture definition is seriously influenced, some families can be covered by beautiful decorative cloth, the mode needs to be manually covered, the number of times of using the LED liquid crystal screen is in direct proportion to the number of times of manually covering, if the LED screen is manually covered frequently, the mode is extremely troublesome, and the probability that the LED liquid crystal screen is forgotten to be covered is higher.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides an LED backlight liquid crystal television.
The invention is realized by adopting the following technical scheme: an LED backlight liquid crystal television structurally comprises a protective outer frame and a liquid crystal screen, wherein the protective outer frame is arranged on the liquid crystal screen;
protection frame is including protection machanism, equidistance telescopic machanism, screw drive group, time type frame and power unit, an inboard of returning the type frame is equipped with protection machanism, and another inboard then sets up power unit, protection machanism's upper and lower both ends are all organized through screw drive and are carried out the transmission and connect, screw drive group all is connected with the equidistance telescopic machanism, screw drive group all are provided with two sets ofly, the equidistance telescopic machanism still connects in protection machanism, it cooperatees with the LCD screen to return the type frame.
As the optimization, protection machanism is including a spiral case section of thick bamboo, a bevel gear, a clockwork spring, a pivot and protection curtain, the central point of spiral case section of thick bamboo puts and installs the pivot No. one, the both ends of a pivot all run through in the spiral case section of thick bamboo excessive cooperation have a bevel gear, the spiral case section of thick bamboo embeds there is the clockwork spring that is connected with a pivot, the one end that a pivot was kept away from to a clockwork spring is connected in protection curtain, protection curtain runs through in the rectangular opening of spiral case section of thick bamboo and is connected with equidistance telescopic machanism, a bevel gear is equal transmission and is connected with screw drive group.
As optimization, equidistance telescopic machanism is including guide bar, fixed plate, connection piece, the flexible group of scissors fork and movable plate, the guide bar is equipped with two and all the equipartition has the connection piece that adopts clearance fit with it, the connection piece all is connected in the flexible group of scissors fork, the flexible group of scissors fork is located between the guide bar of two mutual parallels, the one end hinged joint of the flexible group of scissors fork has the fixed plate, and the other end is articulated with the movable plate, fixed plate and guide bar fixed connection, movable plate and guide bar sliding fit, the end-to-end connection of guide bar is in the inner wall of returning the type frame, the movable plate is organized with screw drive and is connected, the connection piece is connected in the protective curtain.
As optimization, the connection piece is including mounting hole, lamellar body and guiding hole, the lamellar body sets up for integrated into one piece's concave structure, the mounting hole has been seted up at lamellar body concave part both ends, the guiding hole has been seted up to one side of lamellar body, guiding hole and guide bar adopt clearance fit, the mounting hole with cut the flexible group link of fork, the one side that its concave part was kept away from to the lamellar body is connected in the protection curtain.
As optimization, the scissor telescopic group comprises an inner rod, an inner spring, grooves, a centering rod and a hinge rod, the grooves are formed in two tail ends of the centering rod and one end of the hinge rod, the inner spring is arranged in each groove, the centering rod is connected with the hinge rod through the inner spring, the inner rod and the inner spring, and one end, far away from the centering rod, of the hinge rod is connected with a mounting hole through a support shaft.
Preferably, the screw rod transmission set comprises a nut pair, a second bevel gear and a screw rod, the screw rod is in threaded connection with the nut pair, the second bevel gear is mounted at each of two tail ends of the screw rod, one second bevel gear is in orthogonal meshing with the first bevel gear, the other second bevel gear is in transmission connection with the power mechanism, and the nut pair is fixedly connected with the movable plate.
As optimization, power unit is including No. three bevel gears, No. two pivots, an insulating cylinder, a spring plate, No. four bevel gears and electro-magnet, the insulating cylinder center is provided with No. two pivots, No. two pivot both ends run through in the insulating cylinder and excessively cooperate with No. three bevel gears, the insulating cylinder embeds there is the spring plate, the spring plate cooperatees with No. four bevel gears, No. four bevel gears cover is put in No. two pivots, the bottom surface still installs the electro-magnet in the insulating cylinder, No. three bevel gears and No. two bevel gear quadrature meshing.
As optimization, the clockwork spring dish is including gear wheel, iron sheet, No. two clockwork springs, disc and No. three pivots, the disc embeds there is No. two clockwork springs, No. two clockwork spring one end is connected with No. three pivots, and the other end is connected with the iron sheet, No. three pivots and disc are concentric circles structure and one end is equipped with the gear outward, gear and No. four bevel gear quadrature meshing, disc and insulating cylinder fixed connection, the iron sheet is just relative with the electro-magnet.
Advantageous effects
When the electromagnet is powered off, the electromagnet does not generate magnetic force on the iron sheet, so that the second spring is not forced to reset and drives the third rotating shaft to rotate, so that the fourth bevel gear is linked through the large gear, the second rotating shaft rotates, the second bevel gear rotates through the third bevel gear, thereby leading the screw rod to be linked and simultaneously driving the nut pair to translate towards the power mechanism direction, leading the movable plate to stretch the scissor telescopic group under the guiding action of the guide rod, further, the protective curtain is pulled by the connecting piece, meanwhile, the second bevel gear at the other end drives the first bevel gear to rotate, so that the first rotating shaft rotates, the protective curtain is further released by the first spring, when the iron sheet rises to the maximum, the protective curtain can cover the screen of the liquid crystal screen, so that the screen is effectively prevented from being damaged or being infected with dust, the protective curtain has a higher protective effect on the screen, and the screen has a dustproof function;
when the electromagnet is electrified, the electromagnet generates magnetic force on the iron sheet, so that the iron sheet descends to move towards the electromagnet, tension stress is generated on the spring II, the spring II enables the rotating shaft III to rotate, the screw rod indirectly rotates and simultaneously drives the nut pair to translate towards the isometric telescopic mechanism, the movable plate draws and contracts the scissor telescopic group under the guiding action of the guide rod, the guide rod is arranged to limit the scissor telescopic group, the inner spring is compressed, the inner rod is retracted towards the centering rod, the protective curtain and the outlet of the scroll cylinder can be ensured to be on the same horizontal line, the protective curtain is prevented from deviating and is greatly rubbed with the scroll cylinder during rolling, the protective curtain is well protected, the service life of the protective curtain is prolonged, meanwhile, the rotating shaft I rotates to roll the protective curtain through the spring I, when the iron sheet falls to the maximum, the protective curtain is far away from the screen, can be normally used, and cannot shield the screen.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, through the combined arrangement of the protection mechanism, the equidistant telescopic mechanism, the lead screw transmission group, the circular frame and the power mechanism, the LED liquid crystal screen does not need to be covered manually, based on the magnetic principle and the characteristics of the spiral spring, when the LED liquid crystal screen is in a power-on state, the electromagnet is also in a power-on state, so that the protection curtain is rolled away from the LED screen, when the LED liquid crystal screen is in a power-off state, the electromagnet is also in a power-off state, the protection curtain covers the LED screen, when the LED liquid crystal screen is idle, the LED screen can be effectively prevented from being infected with dust impurities, the situation that the screen has dust dirt in the south wind is avoided, the screen is prevented from being scraped by manual dirt, a good protection effect is achieved on the screen, and the picture definition of the screen is not influenced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of an LED backlight lcd tv of the present invention.
Fig. 2 is a schematic top view of the protective outer frame of the present invention in a first working state.
Fig. 3 is a schematic top view of the protective outer frame of the present invention in a second working state.
Fig. 4 is a schematic top view of the protection mechanism of the present invention.
Fig. 5 is a schematic diagram of a transverse cross-sectional structure of the protection mechanism of the present invention.
Fig. 6 is a longitudinal sectional structure diagram of the connecting piece of the invention.
Fig. 7 is a schematic partial sectional view of the scissor telescopic group of the present invention.
Fig. 8 is a front view of the power mechanism according to the present invention.
Fig. 9 is a rear view structural diagram of the power mechanism of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
a protective outer frame-1, an LED liquid crystal screen-2, a protective mechanism-10, an equidistant telescopic mechanism-11, a screw rod transmission group-12, a clip-shaped frame-13, a power mechanism-14, a scroll cylinder-100, a first bevel gear-101, a first spiral spring-102, a first rotating shaft-103, a protective curtain-104, a guide rod-111, a fixed plate-112, a connecting sheet-113, a scissor telescopic group-114, a movable plate-115, a mounting hole-113 a, a sheet body-113 b, a guide hole-113 c, an inner rod-114 a, an inner spring-114 b, a groove-114 c, a centering rod-114 d, a hinge rod-114 e, a nut pair-120, a second bevel gear-121, a screw rod-122, a third bevel gear-140, a second rotating shaft-141, a second rotating shaft-114, An insulating cylinder-142, a spring plate-143, a fourth bevel gear-144, an electromagnet-145, a bull gear-143 a, an iron sheet-143 b, a second spring-143 c, a disc-143 d and a third rotating shaft-143 e.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-9, the present invention provides a technical solution of an LED backlight lcd tv: the LED liquid crystal display screen comprises a protective outer frame 1 and an LED liquid crystal screen 2, wherein the protective outer frame 1 is arranged on the LED liquid crystal screen 2;
The protection mechanism 10 comprises a scroll cylinder 100, a bevel gear 101, a spiral spring 102, a rotating shaft 103 and a protection curtain 104, the rotating shaft 103 is installed at the center of the scroll cylinder 100, the two ends of the rotating shaft 103 are both penetrated through the scroll cylinder 100 and are excessively matched with the bevel gear 101, the spiral cylinder 100 is internally provided with the spiral spring 102 connected with the rotating shaft 103, one end of the spiral spring 102 far away from the rotating shaft 103 is connected to the protection curtain 104, the protection curtain 104 penetrates through a long strip opening of the scroll cylinder 100 and is connected with an equidistant telescopic mechanism 11, the spiral gear 101 is in transmission connection with a screw rod transmission set 12, and the protection mechanism 10 is arranged in a manner that the LED liquid crystal screen 2 can be protected and dustproof when being idle.
Equidistance telescopic machanism 11 is including guide bar 111, fixed plate 112, connection piece 113, the flexible group 114 of scissors fork and movable plate 115, guide bar 111 is equipped with two and all the equipartition has the connection piece 113 of adopting clearance fit with it, connection piece 113 all connects in the flexible group 114 of scissors fork, the flexible group 114 of scissors fork is located between two guide bar 111 that are parallel to each other, the flexible group 114 of scissors fork's one end hinged joint has fixed plate 112, and the other end is articulated with movable plate 115, fixed plate 112 and guide bar 111 fixed connection, movable plate 115 and guide bar 111 sliding fit, the end connection of guide bar 111 is in the inner wall of returning type frame 13, movable plate 115 is connected with screw drive group 12, connection piece 113 is connected in protective curtain 104, equidistance telescopic machanism 11's setting lies in the protective curtain 104 exhibition, and the cocket-style of preventing when hiding the LED screen.
The connecting sheet 113 includes a mounting hole 113a, a sheet body 113b and a guide hole 113c, the sheet body 113b is arranged in a concave structure formed integrally, the mounting hole 113a is formed at two ends of a concave portion of the sheet body 113b, the guide hole 113c is formed in one side of the sheet body 113b, the guide hole 113c is in clearance fit with the guide rod 111, the mounting hole 113a is connected with the scissor telescopic group 114, one side of the sheet body 113b, which is far away from the concave portion, is connected to the protective curtain 104, and the connecting sheet 113 is arranged in a manner that the protective curtain 104 is folded along with the telescopic group 114 of the scissor telescopic group, and is stretched and unfolded.
The scissor telescopic group 114 comprises an inner rod 114a, an inner spring 114b, a groove 114c, a centering rod 114d and a hinge rod 114e, the grooves 114c are respectively formed at two tail ends of the centering rod 114d and one end of the hinge rod 114e, the inner spring 114b is respectively arranged in each groove 114c, the centering rod 114d is respectively connected with the hinge rod 114e through the inner spring 114b, the inner rod 114a and the inner spring 114b, one end of the hinge rod 114e far away from the centering rod 114d is connected with the mounting hole 113a through a fulcrum, the scissor telescopic group 114 has a telescopic function, and the two guide rods 111 move between the telescopic and the stretching, so that the protective curtain 104 and the outlet of the scroll cylinder 100 can be ensured to be on the same horizontal line, the protective curtain 104 is prevented from being deviated and generates large friction with the scroll cylinder 100 when being rolled, and the protective curtain 104 is well protected, helping to extend the useful life of the protective curtain 104.
The screw rod transmission group 12 comprises a nut pair 120, a second bevel gear 121 and a screw rod 122, the screw rod 122 is in threaded connection with the nut pair 120, the two ends of the screw rod 122 are respectively provided with the second bevel gear 121, one second bevel gear 121 is orthogonally meshed with the first bevel gear 101, the other second bevel gear 121 is in transmission connection with the power mechanism 14, the nut pair 120 is fixedly connected with the movable plate 115, and the screw rod transmission group 12 can drive the equidistant telescopic mechanism 11 to stretch and simultaneously drive the protection mechanism 10 to rotate.
The power mechanism 14 comprises a third bevel gear 140, a second rotating shaft 141, an insulating cylinder 142, a spring plate 143, a fourth bevel gear 144 and an electromagnet 145, the second rotating shaft 141 is arranged at the center of the insulating cylinder 142, two tail ends of the second rotating shaft 141 penetrate through the insulating cylinder 142 and are in excessive fit with the third bevel gear 140, the spring plate 143 is arranged in the insulating cylinder 142, the spring plate 143 is matched with the fourth bevel gear 144, the fourth bevel gear 144 is sleeved on the second rotating shaft 141, the electromagnet 145 is further arranged on the inner bottom surface of the insulating cylinder 142, the third bevel gear 140 is in orthogonal mesh with the second bevel gear 121, and the power mechanism 14 is arranged to indirectly provide power for the protection mechanism 10, so that the protection curtain 104 can be rolled in or placed out.
The spring plate 143 includes a large gear 143a, an iron plate 143b, a second spring 143c, a disc 143d and a third rotating shaft 143e, the second spring 143c is disposed in the disc 143d, one end of the second spring 143c is connected to the third rotating shaft 143e, the other end of the second spring is connected to the iron plate 143b, the third rotating shaft 143e and the disc 143d are concentric and have a gear 143a, the gear 143a is orthogonally engaged with a fourth bevel gear 144, the disc 143d is fixedly connected to the insulating cylinder 142, the iron plate 143b is opposite to the electromagnet 145, the spring plate 143 is disposed such that the second spring 143c can be drawn and contracted when the iron plate 143b is subjected to a magnetic force, and the second spring 143c is automatically reset when the iron plate 143b is not subjected to a magnetic force, and can provide power for the screw driving unit 12.
The working principle of the invention is as follows: when the LED liquid crystal screen 2 is in a power-on state, the electromagnet 145 is also in a power-on state, when the LED liquid crystal screen 2 is in a power-off state, the electromagnet 145 is also in a power-off state, when the LED liquid crystal screen is powered on, the protective curtain 104 is far away from the LED screen, and when the power is off, the protective curtain 104 covers the LED screen;
when the electromagnet 145 is powered off, based on the magnetic principle, the electromagnet 145 does not generate magnetic force on the iron sheet 143b, so the second spring 143c is not reset to drive the third rotating shaft 143e to rotate, the fourth bevel gear 144 is linked through the large gear 143a, the second rotating shaft 141 rotates, the second bevel gear 121 rotates through the third bevel gear 140, the screw rod 122 is linked and drives the nut pair 120 to translate towards the power mechanism 14, the movable plate 115 stretches the scissor telescopic group 114 under the guiding action of the guide rod 111, the protective curtain 104 is pulled through the connecting plate 113, meanwhile, the second bevel gear 121 at the other end also drives the first bevel gear 101 to rotate, the first rotating shaft 103 rotates, the protective curtain 104 is further released through the first bevel gear 102, when the iron sheet 143b rises to the maximum, the protective curtain 104 can cover the screen of the LED liquid crystal 2, the LED screen has the advantages that the screen is effectively prevented from being damaged or being infected with dust, the LED screen is protected well, and meanwhile the LED screen has a dustproof function;
when the electromagnet 145 is powered on, based on the magnetic principle, the electromagnet 145 generates magnetic force on the iron sheet 143b, so that the iron sheet 143b descends to move towards the electromagnet 145, a tensile force is generated on the second spring 143c, the second spring 143c rotates the third rotating shaft 143e, the screw rod 122 is indirectly rotated, and simultaneously the nut pair 120 is driven to translate towards the equidistant extension mechanism 11, so that the movable plate 115 draws and contracts the scissor telescopic set 114 under the guiding action of the guide rod 111, the guide rod 111 is arranged to limit the scissor telescopic set 114, the inner spring-114 b is compressed, the inner rod-114 a is drawn inwards towards the centering rod-114 d, so that the protective curtain 104 and the outlet of the scroll cylinder 100 can be ensured to be on the same horizontal line, the protective curtain 104 is prevented from being deviated and generates large friction with the scroll cylinder 100 when being rolled, and the protective curtain 104 is well protected, the service life of the protective curtain 104 is prolonged, meanwhile, the first rotating shaft 103 rotates to inwards roll the protective curtain 104 through the first spring 102, when the iron sheet 143b descends to the maximum limit, the protective curtain 104 is far away from the LED screen, the LED screen can be normally used, and the LED screen cannot be shielded.
In summary, the technical progress obtained by the invention compared with the prior art is as follows: according to the invention, through the combined arrangement of the protection mechanism, the equidistant telescopic mechanism, the lead screw transmission group, the circular frame and the power mechanism, the LED liquid crystal screen does not need to be covered manually, based on the magnetic principle and the characteristics of the spiral spring, when the LED liquid crystal screen is in a power-on state, the electromagnet is also in a power-on state, so that the protection curtain is rolled away from the LED screen, when the LED liquid crystal screen is in a power-off state, the electromagnet is also in a power-off state, the protection curtain covers the LED screen, when the LED liquid crystal screen is idle, the LED screen can be effectively prevented from being infected with dust impurities, the situation that the screen has dust dirt in the south wind is avoided, the screen is prevented from being scraped by manual dirt, a good protection effect is achieved on the screen, and the picture definition of the screen is not influenced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (1)
1. The utility model provides a LED backlight LCD TV, its structure is including protection frame (1) and LED LCD screen (2), be provided with protection frame (1) on LED LCD screen (2), its characterized in that: the protection outer frame (1) comprises a protection mechanism (10), equidistant telescopic mechanisms (11), a screw rod transmission group (12), a clip frame (13) and a power mechanism (14), the protection mechanism (10) and the power mechanism (14) which are connected through the screw rod transmission group (12) are arranged in the clip frame (13), the equidistant telescopic mechanisms (11) are connected with the protection mechanism (10) and the screw rod transmission group (12), and the clip frame (13) is matched with the LED liquid crystal screen (2); the protection mechanism (10) comprises a scroll cylinder (100), a first bevel gear (101), a first spiral spring (102), a first rotating shaft (103) and a protection curtain (104), the scroll cylinder (100) is provided with the first rotating shaft (103) with the first bevel gear (101) at two tail ends, the first rotating shaft (103) is connected with the protection curtain (104) through the first spiral spring (102), the protection curtain (104) is connected with an equidistant telescopic mechanism (11), and the first bevel gear (101) is connected with a screw rod transmission set (12); the equidistant telescopic mechanism (11) comprises a guide rod (111), a fixed plate (112), a connecting sheet (113), a scissor telescopic group (114) and a movable plate (115), one end of the scissor telescopic group (114) is connected with the fixed plate (112), the other end of the scissor telescopic group is connected with the movable plate (115), the connecting sheets (113) are arranged on two sides of the scissor telescopic group, the fixed plate (112), the movable plate (115) and the connecting sheet (113) are connected with the guide rod (111), the guide rod (111) is connected with a clip frame (13), the movable plate (115) is connected with a screw rod transmission group (12), and the connecting sheet (113) is connected with a protective curtain (104); the connecting piece (113) comprises two mounting holes (113a), a piece body (113b) and a guide hole (113c), the piece body (113b) is provided with one mounting hole (113a) and one guide hole (113c), the guide hole (113c) is matched with the guide rod (111), the mounting hole (113a) is connected with the scissor telescopic group (114), and the piece body (113b) is connected with the protective curtain (104); the scissor telescopic group (114) comprises inner rods (114a), inner springs (114b), grooves (114c), a centering rod (114d) and a hinge rod (114e), the tail ends of the centering rod (114d) are connected with the hinge rod (114e) through the two inner springs (114b) and one inner rod (114a), the grooves (114c) are formed in the centering rod (114d) and the hinge rod (114e), the grooves (114c) are formed in the inner springs (114b), and the hinge rod (114e) is connected with the mounting hole (113 a); the screw rod transmission set (12) comprises a nut pair (120), two bevel gears (121) and a screw rod (122), wherein one nut pair (120) and two bevel gears (121) are arranged on the screw rod (122), one bevel gear (121) is meshed with the first bevel gear (101), the other bevel gear (121) is connected to the power mechanism (14), and the nut pair (120) is connected with the movable plate (115); the power mechanism (14) comprises a third bevel gear (140), a second rotating shaft (141), an insulating cylinder (142), a spring plate (143), a fourth bevel gear (144) and an electromagnet (145), the second rotating shaft (141) is arranged at the center of the insulating cylinder (142), two tail ends of the second rotating shaft (141) penetrate through the insulating cylinder (142) to be in transition fit with the third bevel gear (140), the spring plate (143) and the electromagnet (145) which are matched with the fourth bevel gear (144) are arranged in the insulating cylinder (142), and the third bevel gear (140) is matched with the second bevel gear (121); the spring plate (143) comprises a large gear (143a), an iron sheet (143b), a second spring (143c), a disc (143d) and a third rotating shaft (143e), the disc (143d) is internally provided with the second spring (143c) connected with the third rotating shaft (143e) and the iron sheet (143b), the third rotating shaft (143e) is provided with the large gear (143a), the large gear (143a) is matched with a fourth bevel gear (144), and the disc (143d) is connected with an insulating cylinder (142);
when the LED liquid crystal screen (2) is in a power-on state, the electromagnet (145) is also in a power-on state, when the LED liquid crystal screen (2) is in a power-off state, the electromagnet (145) is also in a power-off state, when the LED liquid crystal screen is powered on, the protective curtain (104) is far away from the LED screen, and when the LED liquid crystal screen is powered off, the protective curtain (104) covers the LED screen; when the electromagnet (145) is powered off, based on the magnetic principle, the electromagnet (145) does not generate magnetic force on the iron sheet (143b), so that the second spring (143c) is not reset under stress and drives the third rotating shaft (143e) to rotate, the fourth bevel gear (144) is linked through the large gear (143a), the second rotating shaft (141) rotates, the second bevel gear (121) is rotated through the third bevel gear (140), the screw rod (122) is linked and drives the nut pair (120) to translate towards the power mechanism (14), the movable plate (115) stretches the scissor telescopic group (114) under the guiding action of the guide rod (111), the connecting sheet (113) pulls the protective curtain (104), and meanwhile, the second bevel gear (121) at the other end also drives the first bevel gear (101) to rotate, so that the first rotating shaft (103) rotates, further, the protective curtain (104) is released through the first spring (102), when the iron sheet (143b) rises to the maximum, the protective curtain (104) can cover the screen of the LED liquid crystal screen (2), the screen is effectively prevented from being damaged or stained with dust, the LED screen is protected highly, and meanwhile the LED screen has a dustproof function; when the electromagnet (145) is electrified, based on the magnetic principle, the electromagnet (145) generates magnetic force on the iron sheet (143b), so that the iron sheet (143b) descends to move towards the electromagnet (145), the second spring (143c) is subjected to tension stress, the second spring (143c) enables the third rotating shaft (143e) to rotate, the screw rod (122) indirectly rotates and simultaneously drives the nut pair (120) to translate towards the equidistant telescopic mechanism (11), the movable plate (115) draws and contracts the scissor telescopic group (114) under the guiding action of the guide rod (111), the arrangement of the guide rod (111) plays a limiting role on the scissor telescopic group (114), the inner spring (114b) is compressed, the inner rod (114a) retracts towards the middle rod (114d), and therefore the protective curtain (104) and the outlet of the scroll cylinder (100) can be ensured to be on the same horizontal line, the protective curtain (104) is prevented from being deviated and generates large friction with the scroll cylinder (100) when being wound, the protection curtain (104) is well protected, the service life of the protection curtain (104) is prolonged, meanwhile, the first rotating shaft (103) rotates to inwards roll the protection curtain (104) through the first spring (102), when the iron sheet (143b) descends to the maximum, the protection curtain (104) is far away from the LED screen, the protection curtain can be normally used, and the LED screen cannot be shielded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737580.5A CN110460793B (en) | 2019-08-12 | 2019-08-12 | LED backlight liquid crystal television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910737580.5A CN110460793B (en) | 2019-08-12 | 2019-08-12 | LED backlight liquid crystal television |
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| CN110460793A CN110460793A (en) | 2019-11-15 |
| CN110460793B true CN110460793B (en) | 2021-08-27 |
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| CN109237256A (en) * | 2017-07-11 | 2019-01-18 | 北京中科水景科技有限公司 | LED screen erecting equipment and LED screen hoisting system |
| CN208363376U (en) * | 2018-06-08 | 2019-01-11 | 深圳市中装建设集团股份有限公司 | A kind of Intelligent light-sensitive sunshade curtain wall |
| CN109882058A (en) * | 2019-01-30 | 2019-06-14 | 界首市迅立达电梯有限公司 | A kind of smart home of safe protection engineering door and window roller shutter structure |
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| CN86101589A (en) * | 1986-03-10 | 1987-01-24 | 王宝瑞 | The housing of TV set of band shielding curtain |
| CN2110429U (en) * | 1991-08-13 | 1992-07-22 | 都兴德 | Extensible equidistance curtain hanger |
| CN104080374A (en) * | 2011-08-26 | 2014-10-01 | 亨特道格拉斯有限公司 | Cordless retractable roller shade for window coverings |
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| CN110460793A (en) | 2019-11-15 |
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