CN117234003B - Backlight module display screen with heat radiation structure - Google Patents
Backlight module display screen with heat radiation structure Download PDFInfo
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- CN117234003B CN117234003B CN202311127611.8A CN202311127611A CN117234003B CN 117234003 B CN117234003 B CN 117234003B CN 202311127611 A CN202311127611 A CN 202311127611A CN 117234003 B CN117234003 B CN 117234003B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
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- 238000005381 potential energy Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003993 interaction Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
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- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000001179 sorption measurement Methods 0.000 description 1
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses a backlight module display screen with a heat dissipation structure, which comprises a shell, wherein a backlight assembly is arranged in the shell, the upper end of the backlight assembly is propped against the inner top surface of the shell, and the backlight module display screen further comprises: a detection plate movably disposed in the housing and positioned at a lower side of the backlight assembly; the anti-press plate is arranged between the backlight assembly and the detection plate, a plurality of lamp grooves are formed in the anti-press plate, lamp strips are clamped between the anti-press plate and the detection plate, and lamp beads of the lamp strips are embedded into the lamp grooves; and the radiating window assembly is linked with the detection plate. According to the invention, the anti-pressing plate is arranged, so that when the lamp strip is clamped between the detection plate and the anti-pressing plate and is fixed, each lamp bead on the lamp strip is embedded into each corresponding lamp groove, and then the lamp bead is prevented from being directly extruded by the backlight assembly, and the lamp bead is prevented from being damaged; in addition, through the setting of heat dissipation window subassembly, after the thermal expansion of pick-up plate detection backlight unit takes place to remove, the activity linkage heat dissipation window subassembly of pick-up plate is used in order to form the thermovent on the casing.
Description
Technical Field
The invention relates to the technical field of liquid crystal display screens, in particular to a backlight module display screen with a heat dissipation structure.
Background
The liquid crystal display is a passive light-emitting element, the display screen does not emit light, but is illuminated by a backlight system below the display screen, and the backlight source and the liquid crystal display screen are combined to form a liquid crystal display module. In the assembly process of the backlight source and the display panel, good sealing is particularly important, if poor sealing occurs once external dust enters into the space between the display panel and the backlight source, and poor phenomena such as shadow and spots can occur on the display panel, the current display screen adopts a structure that most sealing materials with four frames are clamped between the display panel and the backlight source, so that a closed space is formed to isolate the outside.
The patent document CN210109515U discloses a backlight heat dissipation module, a liquid crystal display and a terminal device on the 21 st year 2020, the backlight heat dissipation module comprises: the light source comprises an FPC, the FPC is fixed on the inner side of a bottom plate of the iron frame through heat dissipation double-sided adhesive layers in an adhering mode, a heat dissipation single-sided adhesive layer is arranged on the back face of the iron frame, and the heat dissipation single-sided adhesive layer does not extend to the position of the light source corresponding to the iron frame. The beneficial effects are that: the double-sided adhesive tape adhered between the FPC and the iron frame is changed into the heat dissipation double-sided adhesive tape containing the graphite sheet, and the light source can directly conduct heat dissipation treatment through the graphite layer, so that the heat dissipation effect is better; meanwhile, the heat dissipation single-sided adhesive tape at the back of the iron frame does not need to be prolonged to the position of the light source corresponding to the iron frame, so that the thickness of the heat dissipation double-sided adhesive tape is reduced, the use area of the graphite sheet is reduced, and the cost is effectively saved.
Obviously, such a display screen generates a large amount of heat along with continuous lighting of an internal light source, if the heat cannot be timely and outwards dissipated, the light guide plate is heated and expanded, and when the conventional backlight module is assembled, in order to meet the above sealing requirement, the LED light source and the light guide plate are usually contacted with each other without a gap therebetween, and then the LED light source is very easily damaged due to extrusion caused by the heated expansion of the light guide plate, so that a backlight module display screen with a heat dissipation structure is needed to solve the above problems.
Disclosure of Invention
The present invention is directed to a backlight module display screen with a heat dissipation structure, so as to solve the above-mentioned drawbacks in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a backlight unit display screen with heat radiation structure, includes the casing, be provided with backlight unit in the casing, backlight unit upper end offsets with the casing interior top surface and sets up, still includes: a detection plate movably disposed in the housing and positioned at a lower side of the backlight assembly; the anti-press plate is arranged between the backlight assembly and the detection plate, a plurality of lamp grooves are formed in the anti-press plate, lamp strips are clamped between the anti-press plate and the detection plate, and lamp beads of the lamp strips are embedded into the lamp grooves; and the heat dissipation window assembly is linked with the detection plate, and a heat dissipation opening is formed on the shell under the pushing of the detection plate by the thermal expansion of the backlight assembly.
Preferably, the inner bottom surface of the shell is provided with a plurality of first elastic pieces connected with the detection plate, the inner wall of the shell is fixedly provided with two symmetrical check blocks, and the detection plate and the anti-pressing plate are limited between the two check blocks to move.
Preferably, the radiating window assembly comprises a window formed in the side wall of the shell, a window plate is rotatably arranged in the window, and the rotation of the window plate is linked with the movement of the detection plate.
Preferably, a first connecting rod is arranged in the shell in a lifting manner, the first connecting rod is fixedly connected with the end part of the detection plate, a first linkage frame is arranged on the first connecting rod, and a first linkage pin which is in linkage with the first linkage frame is arranged on the window plate.
Preferably, the lower end of the shell is provided with an air supply bin, one side of the air supply bin is provided with an air supply fan, an air supply port is arranged between the air supply bin and the shell for communication, a first baffle plate for controlling an air supply port switch is movably arranged in the shell, and the first baffle plate is in linkage with the detection plate.
Preferably, the lower end of the detection plate is hinged with a second connecting rod, the other end of the second connecting rod is connected with a first baffle, a flange is fixedly arranged in the shell, and the first baffle moves in a translation mode between the inner bottom surface of the shell and the flange.
Preferably, the lower end of the shell is movably penetrated and provided with a magnetic plate, the magnetic plate can be lifted and arranged, and when the magnetic plate is positioned at the lowest end of the lifting stroke, the magnetic plate is shielded in an air supply path between the air supply fan and the air supply opening, and the inner top surface of the air supply bin is fixedly provided with cleaning brushes for clamping two opposite sides of the magnetic plate.
Preferably, the bottom surface articulates there is the depression bar in the casing, the depression bar free end is provided with the second linkage round pin, the magnetic plate upper end is provided with the second linkage frame with the linkage of second linkage round pin, be provided with the second elastic component between depression bar downside and the casing bottom surface.
Preferably, the lower end of the air supply bin is opened, and is hinged with a second baffle, and the second baffle is linked with the first baffle through a linkage assembly.
Preferably, the linkage assembly comprises a first gear which is rotatably arranged on the inner bottom surface of the shell, a trigger piece which can extend upwards out of the inner bottom surface of the shell to be located in the movable stroke of the first baffle is fixedly arranged on the first gear, a second gear is linked with the first gear through a rack, and the second gear is linked with one end of the second baffle through an eccentric pull rod.
In the technical scheme, the invention has the beneficial effects that:
according to the backlight module display screen with the heat dissipation structure, the anti-pressing plate is arranged, when the lamp strip is clamped between the detection plate and the anti-pressing plate and is fixed, each lamp bead on the lamp strip is embedded into each corresponding lamp groove, and then the anti-pressing plate is abutted against the backlight assembly, so that the backlight assembly is prevented from directly pressing the lamp beads, and the lamp beads are prevented from being damaged; in addition, still through the setting of heat dissipation window subassembly, detect backlight unit's thermal expansion and take place to remove the back at the pick-up plate, the activity linkage heat dissipation window subassembly of pick-up plate is used in order to form the thermovent on the casing, can realize the mutual of the inside and outside air of casing in succession, help dispel the heat fast, from this further reduces backlight unit thermal expansion and leads to the fact the influence to casing internals, improves the practicality of device.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all of the features of the disclosed technology.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram showing an overall structure of a backlight assembly according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the structure shown in FIG. 2A according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a linkage structure of a first baffle and a second baffle according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a front cross-sectional structure according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of the structure shown in FIG. 5B according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a partial front sectional structure of an air outlet according to an embodiment of the present invention when the air outlet is opened.
Reference numerals illustrate:
1. a housing; 2. a backlight assembly; 3. a detection plate; 4. an anti-press plate; 5. a lamp groove; 6. a light bar; 7. a first elastic member; 8. a stop block; 9. a window; 10. a window panel; 11. a first link; 12. a first linkage frame; 13. a first linkage pin; 14. an air supply bin; 15. a blowing fan; 16. an air supply port; 17. a first baffle; 18. a second link; 19. a flange; 20. a magnetic plate; 21. a cleaning brush; 22. a compression bar; 23. a second linkage pin; 24. a second linkage frame; 25. a second elastic member; 26. a second baffle; 27. a first gear; 28. a trigger; 29. a rack; 30. a second gear; 31. an eccentric pull rod; 32. a magnetic attraction piece; 33. a chute; 34. a slide block; 35. a third elastic member; 36. a button; 37. a torsion spring; 38. a rotating plate; 39. an eccentric rod; 40. a third linkage frame; 41. a hook body; 42. a hanging rod; 43. a limit rod; 44. and a limit groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
Referring to fig. 1-7, a backlight module display screen with a heat dissipation structure provided in an embodiment of the invention includes a housing 1, a backlight assembly 2 disposed in the housing 1, an upper end of the backlight assembly 2 being disposed against an inner top surface of the housing 1, and further includes: a detection plate 3 movably disposed in the housing 1 and positioned at a lower side of the backlight assembly 2; an anti-press plate 4 arranged between the backlight assembly 2 and the detection plate 3, on which a plurality of lamp grooves 5 are formed, and a lamp strip 6 is clamped between the anti-press plate and the detection plate 3, and the lamp beads of the lamp strip 6 are embedded into the lamp grooves 5; and the heat dissipation window assembly is linked with the detection plate 3, and forms a heat dissipation opening on the shell 1 under the pushing of the detection plate 3 by the thermal expansion of the backlight assembly 2.
Specifically, the shell 1 is a part of shell at the back of the display screen, preferably rectangular, and the front is opened and is used for connecting a display assembly; after the shell 1 is connected with the display component, the setting positions of the radiating window components on the surface are closed; the whole backlight assembly 2 is rectangular plate-shaped, a positioning piece is arranged on the inner top surface of the shell 1, and a positioning groove matched with the positioning piece is arranged in the middle of the upper end of the backlight assembly 2; the backlight assembly 2 is limited in the housing 1 after the housing 1 is connected with the display assembly to close the front, and can only perform downward extension movement of the lower end and same-side extension movement of the left and right ends under the condition of thermal expansion. The detection plate 3 is arranged in parallel with the lower end of the backlight assembly 2, the detection plate 3 is a heat-conducting plate, and a graphite heat-conducting layer or a metal heat-conducting layer can be preferably arranged in the detection plate, so that heat generated on the lamp strip 6 can be conveniently guided into a gap between the inside of the shell 1 and the backlight assembly 2; the thickness of the anti-press plate 4 is not smaller than the height of the lamp beads on the lamp strip 6, so that the lamp strip 6 is clamped between the detection plate 3 and the anti-press plate 4, and after the lamp beads on the lamp strip 6 are embedded into the lamp grooves 5, the anti-press plate 4 is in contact with the propping of the backlight assembly 2, so that the lamp beads cannot be in contact with the lower end of the backlight assembly 2, and the expansion movement of the backlight assembly 2, namely the integral movement of the detection plate 3, the lamp strip 6 and the anti-press plate 4 is pushed, the lamp beads cannot be extruded, and the lamp strip 6 and the lamp beads on the lamp strip are protected; in addition, the lamp groove 5 is arranged, so that the illumination direction of the lamp beads only faces the backlight assembly 2, and the light guide effect is better. When the backlight assembly 2 is heated and expanded to push the detection plate 3 to move downwards to a certain position, the heat dissipation window assembly enables the shell 1 to form a heat dissipation opening, promotes the interaction of air inside and outside the shell 1 so as to help heat dissipation, and when the temperature of the backlight assembly 2 is suitable and the detection plate 3 is not pushed to move downwards to a certain position, the heat dissipation opening is kept closed, so that the interaction of air inside and outside the shell 1 is avoided, namely, the pollution of dust and the like generated inside the shell 1 is avoided. In actual use, the lamp strip 6 is clamped between the detection plate 3 and the pressure-proof plate 4, and each lamp bead on the lamp strip 6 is embedded into each corresponding lamp groove 5 on the pressure-proof plate 4, and then the pressure-proof plate 4 is abutted against the backlight component 2, so that the backlight component 2 can be prevented from directly extruding the lamp beads, and the lamp beads are prevented from being damaged when the backlight component 2 is heated and expanded; in addition, still through the setting of heat dissipation window subassembly, detect the thermal expansion of backlight unit 2 and take place to remove the back at pick-up plate 3, the activity linkage heat dissipation window subassembly of pick-up plate 3 is acted on and is formed the thermovent on casing 1, can realize the interaction of the inside and outside air of casing 1 then, helps quick heat dissipation, from this further reduces the influence that backlight unit 2 thermal expansion caused casing 1 internals.
Compared with the prior art, the backlight module display screen with the heat dissipation structure provided by the embodiment of the invention has the advantages that the anti-pressing plate 4 is arranged, when the lamp strip 6 is clamped between the detection plate 3 and the anti-pressing plate 4 and is fixed, each lamp bead on the lamp strip 6 is embedded into each corresponding lamp groove 5, and then the anti-pressing plate 4 is abutted against the backlight assembly 2 to contact, so that the backlight assembly 2 is prevented from directly extruding the lamp beads, and the lamp beads are prevented from being damaged; in addition, still through the setting of heat dissipation window subassembly, detect the thermal expansion of backlight unit 2 and take place to remove the back at pick-up plate 3, the activity linkage heat dissipation window subassembly of pick-up plate 3 is acted on and is formed the thermovent on casing 1, can realize the interaction of the inside and outside air of casing 1 then, and the help dispels the heat fast, from this further reduces the influence that backlight unit 2 thermal expansion caused casing 1 internals, improves the practicality of device.
As a preferred technical solution of this embodiment, the inner bottom surface of the housing 1 is provided with a plurality of first elastic members 7 connected with the detection plate 3, the inner wall of the housing 1 is fixedly provided with two symmetrical stoppers 8, the detection plate 3 and the anti-pressing plate 4 are limited between the two stoppers 8 to move, specifically, the first elastic members 7 may preferably be springs, and the acting direction of the elastic force of the first elastic members 7 is opposite to the direction in which the detection plate 3 is pushed by the backlight assembly 2; the first elastic piece 7 is arranged to keep the detection plate 3 close to the lower end of the backlight assembly 2, and then the pressure-proof plate 4 is kept in abutting contact with the lower end of the backlight assembly 2; the stop block 8 is L-shaped, a part of the stop block is parallel to the inner side wall of the shell 1, and the upper end of the stop block is bent towards the direction away from the inner side wall of the shell 1 so as to be limited on the upper side of the pressure-proof plate 4; the upper end of the stop block 8 is arranged on the side surface of the backlight assembly 2, and a gap is reserved between the stop block and the side surface of the backlight assembly 2 so as not to influence the extension and expansion of the left side and the right side of the backlight assembly 2 when the backlight assembly 2 is expanded by heating; even when the upper end of the anti-pressing plate 4 is not abutted against the backlight assembly 2, the detection plate 3 is kept upwards under the action of the elastic force of the first elastic piece 7, and then the anti-pressing plate 4 is pressed against the inner side of the upper end of the stop block 8, so that the lamp strip 6 can be fixedly clamped when the lamp strip 6 is embedded between the detection plate 3 and the anti-pressing plate 4, and the installation and the fixation of the lamp strip 6 are facilitated.
As a preferred technical scheme of the embodiment, the radiating window assembly comprises a window 9 formed in the side wall of the shell 1, a window plate 10 is rotatably arranged in the window 9, the rotation of the window plate 10 is linked with the movement of the detection plate 3, and the window 9 is particularly arranged close to the lower end of the shell 1, namely, close to the lamp strip 6 serving as a heat source, so that the radiating effect is better; the window 9 can be opened up and down on the same side surface of the shell 1, and each corresponding window plate 10 is synchronously linked with the detection plate 3, so that synchronous opening and closing are realized; the rotation axis position of the window board 10 can be arranged at the upper end and also can be arranged at the middle position, when the rotation axis position of the window board 10 is arranged at the middle position, the window 9 is opened by rotating the upper end towards the inner direction of the shell 1 and the lower end towards the outer direction of the shell 1, otherwise, the window 9 is closed, so that the window board 10 in an opened state is obliquely arranged, the lower end faces outwards, and the possibility that dust enters the shell 1 when air interaction between the inside and the outside of the shell 1 is reduced. The linkage of the window plate 10 and the detection plate 3 is as follows: the linked louver 10 rotates to open the window 9 when the detection plate 3 is pushed by the expansion of the backlight assembly 2, and the linked louver 10 rotates to close the window 9 when the detection plate 3 moves with the contraction of the backlight assembly 2.
As a further preferable technical scheme of the embodiment, a first connecting rod 11 is arranged in the shell 1 in a lifting manner, the first connecting rod 11 is fixedly connected with the end part of the detection plate 3, a first linkage frame 12 is arranged on the first connecting rod 11, a first linkage pin 13 which is linked with the first linkage frame 12 is arranged on the window plate 10, and specifically, the first connecting rod 11 is vertically arranged in the shell 1, and the moving direction of the first connecting rod 11 is lifting movement along with the detection plate 3; the upper end of the window plate 10 is provided with a protruding part protruding towards the inner side of the shell 1, and the first linkage pin 13 is fixedly connected to the protruding part so as to be kept at the inner side of the shell 1; the first linkage pin 13 transversely slides in the first linkage frame 12, and the first linkage pin 13 moves along with the first linkage frame 12 in a lifting manner, so that the lifting of the detection plate 3 can be realized, the window plate 10 is driven to rotate through the first connecting rod 11, the first linkage frame 12 and the first linkage pin 13, and interference does not occur between the window plate 10.
In another embodiment of the present invention, an air supply bin 14 is disposed at the lower end of the housing 1, an air supply fan 15 is disposed at one side of the air supply bin 14, an air supply port 16 is disposed between the air supply bin 14 and the housing 1, the housing 1 is movably provided with a first baffle 17 for controlling the opening and closing of the air supply port 16, the first baffle 17 is linked with the detection plate 3, specifically, the air supply bin 14 is fixedly connected at the lower end of the housing 1, an air inlet is disposed at one side of the air supply bin 14, and the air supply fan 15 is disposed at the side; the air supply fan 15 sends outside air into the air supply bin 14, and then sends the outside air into the shell 1 through the air supply opening 16; the blower fan 15 may preferably be servo-controlled; the air supply opening 16 is formed in the bottom surface of the shell 1 corresponding to the upper end of the air supply bin 14 and is arranged far away from the air inlet, and an air supply path is formed between the air supply fan 15 and the air supply opening 16; the first baffle 17 is attached to the inner bottom surface of the shell 1 to slide so as to control whether the air supply opening 16 is shielded or not, namely, the control switch of the air supply opening 16 is realized; the linkage between the first baffle 17 and the detection plate 3 may be: when the detection plate 3 is pushed downwards by the expansion of the backlight assembly 2, the first baffle 17 is linked to slide away from the upper side of the air supply opening 16, namely the air supply opening 16 is opened, and when the detection plate 3 moves upwards along with the contraction of the backlight assembly 2, the first baffle 17 is linked to slide to block the upper side of the air supply opening 16, namely the air supply opening 16 is closed.
As a preferred technical scheme of the embodiment, the lower end of the detection plate 3 is hinged with a second connecting rod 18, the other end of the second connecting rod 18 is connected with a first baffle 17, a baffle 19 is fixedly arranged in the shell 1, the first baffle 17 moves in a translation manner between the inner bottom surface of the shell 1 and the baffle 19, and specifically, after the light bar 6 is installed and when the backlight assembly 2 is not expanded, the position of the detection plate 3 also enables the second connecting rod 18 to have an inclined angle which deviates from a vertical state; the detection plate 3 drives the upper end of the second connecting rod 18 to lift by lifting, and the lower end of the second connecting rod 18 is fixed in the same height in the shell 1 along with the first baffle 17, so that the relative heights of the two ends of the second connecting rod 18 in the above movement are changed, the horizontal relative distance between the two ends is also changed, and the transverse sliding of the lifting linkage first baffle 17 of the detection plate 3 can be realized; the first baffle 17 is limited to the inner bottom surface of the bonding casing 1 and slides due to the provision of the baffle 19.
As a preferred technical solution of this embodiment, the lower end of the housing 1 is movably provided with a magnetic plate 20, the magnetic plate 20 is arranged in a liftable manner, and when the magnetic plate is at the lowest end of the lifting travel, the magnetic plate is blocked in the air supply path between the air supply fan 15 and the air supply port 16, the cleaning brushes 21 for clamping the two opposite sides of the magnetic plate 20 are fixedly arranged on the inner top surface of the air supply bin 14, specifically, the magnetic plate 20 can be preferably a permanent magnet or an electromagnet, and when the magnetic plate descends and stretches into the air supply bin 14, dust impurities in the air flowing through the air supply path can be adsorbed, so that the air is prevented from entering the housing 1 to cause pollution; when the magnetic plate 20 rises and stretches into the shell 1, the magnetic plate slides and wipes through the cleaning brush 21, so that surface dust can be cleaned down and left in the air supply bin 14.
In addition, a magnetic attraction piece 32 is fixedly arranged at one end of the first baffle 17, which is close to the magnetic plate 20, a chute 33 is arranged in the first baffle 17, a sliding block 34 is movably arranged in the chute 33, the upper end of the sliding block 34 is hinged with the lower end of the second connecting rod 18 through a connecting piece which movably penetrates through the top surface of the first baffle 17, a third elastic piece 35 is arranged in the chute 33 to prevent the sliding block 34 from moving, and specifically, the magnetic attraction piece 32 can be fixedly adsorbed with the magnetic plate 20, and at the moment, the first baffle 17 is positioned at one end position which completely shields the air supply outlet 16; as the magnetic plate 20 descends, the magnetic attraction surface between the magnetic plate 20 and the magnetic attraction piece 32 decreases to be detached; when the third elastic member 35 is disposed, and the detecting plate 3 moves downward, and the magnetic plate 20 and the magnetic attraction member 32 keep adsorption, the detecting plate 3 drives the sliding block 34 to move away from the magnetic plate 20 in the chute 33 through the second connecting rod 18, then the third elastic member 35 deforms and stores elastic potential energy, at this time, the first baffle 17 still completely shields the air supply port 16, then the magnetic plate 20 starts to move downward to relatively slide with the magnetic attraction member 32 to reduce the magnetic attraction surface, and finally releases the elastic potential energy of the third elastic member 35, so that the sliding block 34 is pulled to relatively move and reset in the chute 33, and then the first baffle 17 moves passively to be away from the magnetic plate 20, i.e. the air supply port 16 is opened immediately. The function of controlling the timing of opening the air supply port 16 by the first shutter 17 is realized by the magnetic plate 20 as described above.
As a preferred technical scheme of the embodiment, a compression bar 22 is hinged on the inner bottom surface of the shell 1, a second linkage pin 23 is arranged at the free end of the compression bar 22, a second linkage frame 24 which is linked with the second linkage pin 23 is arranged at the upper end of the magnetic plate 20, a second elastic piece 25 is arranged between the lower side of the compression bar 22 and the inner bottom surface of the shell 1, specifically, a support is arranged on the inner bottom surface of the shell 1, one end of the compression bar 22 is hinged on the support, and the other end is a free end and is bent downwards; the second elastic member 25 is provided so that the free end of the pressing lever 22 is kept elastically lifted; the second linkage pin 23 rotates along with the free end of the pressing rod 22, and relatively moves transversely on the second linkage frame 24, and drives the second linkage frame 24 to lift, namely the rotation of the pressing rod 22 controls the lifting of the magnetic plate 20; the pressing rod 22 can be pressed down by the downward moving detecting plate 3 to rotate so as to reduce the height of the free end, namely, the magnetic plate 20 is driven to move downward, and the second elastic piece 25 compresses and stores elastic potential energy, and when the pressing rod 22 is separated from the downward pressing of the detecting plate 3, the elastic potential energy of the second elastic piece 25 is released, so that the free end of the pressing rod 22 is driven to rotate upward for resetting, namely, the magnetic plate 20 is driven to move upward. In practical use, when the detecting plate 3 just starts to move downwards, the pressing rod 22 is at a raising position, that is, the magnetic plate 20 keeps extending upwards into the casing 1, the magnetic attraction piece 32 and the magnetic plate 20 keep being attracted, the first baffle 17 keeps shielding the upper part of the air supply port 16, so that the moving downwards of the detecting plate 3 pushes the sliding block 34 to move in the sliding groove 33 through the second connecting rod 18, the third elastic piece 35 deforms and stores elastic potential energy, along with the moving downwards of the detecting plate 3, the pressing rod 22 starts to be pressed downwards, the free end of the pressing rod 22 rotates downwards, so that the magnetic plate 20 is driven to move downwards through the second linkage pin 23 and the second linkage frame 24, along with the moving downwards of the magnetic plate 20, the magnetic plate 20 slides relatively with the magnetic attraction piece 32 to reduce the magnetic attraction surface, and finally, the elastic potential energy of the third elastic piece 35 is released, the first baffle 17 is pulled to move away from the magnetic plate 20, that is immediately opened the air supply port 16, and at the moment, the lower end of the magnetic plate 20 is also in a state of being stretched into the air supply port 14 and a supply path, and dust can be shielded. In addition, a button 36 for controlling the start and stop of the blower fan 15 is arranged under the second linkage frame 24 corresponding to the inner bottom surface of the casing 1, and when the magnetic plate 20 moves down to the lowest position, the second linkage frame 24 keeps pressing the button 36 to start the blower fan 15, that is, the start of the blower fan 15 and the opening of the air supply port 16 are synchronized, so that the blower fan is accelerated to supply air into the casing 1 when the temperature of the backlight assembly 2 is too high. However, the arrangement is such that the magnetic plate 20 rises once the pressure lever 22 loses the influence of the pressing of the detection plate 3, the second linkage frame 24 cancels the pressing of the button 36, and the blower fan 15 is turned off, so that the problems of short start-stop intervals, frequent start-stop and poor blower effect of the blower fan 15 may be caused.
As a preferred technical scheme of the embodiment, the lower end of the air supply bin 14 is opened, and is hinged with a second baffle plate 26, the second baffle plate 26 is linked with the first baffle plate 17 through a linkage assembly, and specifically, the lower end of the air supply bin 14 is opened for discharging dust and impurities; the second baffle 26 is used for keeping the open position of the lower end closed when the air supply bin 14 supplies air, ensuring smooth air supply, and keeping the open position of the lower end open when the air supply bin 14 supplies air, ensuring smooth dust and impurity discharge. The linkage of the second baffle 26 and the first baffle 17 is as follows: when the first baffle 17 opens the air supply port 16, the second baffle 26 keeps closing the lower end of the air supply bin 14; when the first baffle 17 closes the air supply port 16, the second baffle 26 keeps the lower end of the air supply compartment 14 open.
As a preferred technical scheme of the embodiment, the linkage assembly comprises a first gear 27 rotatably arranged on the inner bottom surface of the casing 1, a trigger piece 28 which can extend upwards out of the inner bottom surface of the casing 1 and is positioned in the movable stroke of the first baffle 17 is fixedly arranged on the first gear 27, the first gear 27 is linked with a second gear 30 through a rack 29, the second gear 30 is linked with one end of the second baffle 26 through an eccentric pull rod 31, and particularly, a movable cavity for the first gear 27, the rack 29 and the second gear 30 to move is arranged in the entity of the air supply bin 14; a torsion spring 37 is arranged at the rotating shaft of the first gear 27, the torsion spring 37 resists the rotation of the first gear 27, and the unstressed trigger piece 28 keeps rising upwards to extend out of the inner bottom surface of the shell 1; when the triggering piece 28 is positioned at the position that the first baffle 17 closes the air supply opening 16, the first baffle 17 is far away from the vicinity of one end of the magnetic plate 20, so that when the first baffle 17 triggers to open the air supply opening 16, the triggering piece 28 is pushed down immediately, and one end of the triggering piece 28 slides a distance and is blocked on the upper side of the triggering piece 28, so that the toppling state of the triggering piece 28 is maintained; the first gear 27 and the second gear 30 are respectively arranged on the upper side and the lower side of the rack 29, and teeth are arranged on the upper side and the lower side of the rack 29; the second gear 30 is coaxially connected with a rotating plate 38, an eccentric rod 39 is fixedly arranged on the rotating plate 38, a third linkage frame 40 is sleeved on the eccentric rod 39, the upper end of the eccentric pull rod 31 is fixedly connected to the third linkage frame 40, the eccentric pull rod 31 vertically slides downwards to penetrate through the movable cavity, a hook body 41 is arranged at the lower end of the eccentric pull rod 31, one end of the second baffle 26 is arranged below the magnetic plate 20 correspondingly, a hanging rod 42 hooked with the hook body 41 is fixedly arranged at the other end of the second baffle 26, and a rotating shaft of the second baffle 26 is arranged close to the hanging rod 42 and is positioned outside an opening below the air supply bin 14. In actual use, when the first baffle 17 closes the air supply port 16, the trigger piece 28 is not pushed down by the first baffle 17 and keeps rising upwards, then the linkage of the first gear 27, the rack 29 and the second gear 30 causes the rotating plate 38 to drive the eccentric rod 39 to keep at a high position, so the eccentric rod 39 keeps pulling up the eccentric pull rod 31 through the third linkage frame 40, the eccentric pull rod 31 keeps pulling up the hanging rod 42 through the hook 41, and the rotating position of the second baffle 26 is in a state that one end of the second baffle corresponding to the magnetic plate 20 rotates downwards to open the lower end of the air supply bin 14; when the air supply port 16 is opened by the first baffle 17, the triggering piece 28 is pushed down by the opening movement of the first baffle 17, the triggering piece 28 drives the first gear 27 to rotate, the first gear 27 is linked with the second gear 30 through the rack 29, the second gear 30 drives the rotating plate 38 to rotate, the rotating plate 38 drives the eccentric rod 39 to rotate to a low position, then the eccentric pull rod 31 is driven to be lowered by the third linkage frame 40, the eccentric pull rod 31 drives the hanging rod 42 to be lowered by the hook 41, and then one end of the corresponding magnetic plate 20 can be rotated upwards by the second baffle 26 to seal the lower end of the air supply bin 14; in addition, as can be seen from the instant opening movement of the first baffle 17, when the second baffle 26 is linked to close the lower end of the air supply bin 14 through the above process, the second baffle 26 can rapidly rotate upwards, and then the instant closing of the lower end of the air supply bin 14 generates knocking vibration.
In order to solve the problems of short start-stop interval, frequent start-stop and poor air supply effect of the air supply fan 15. One end of the rack 29, which is far away from the first gear 27, is fixedly connected with a limiting rod 43, the limiting rod 43 transversely penetrates through the air supply outlet 16, one end of the limiting rod 43 is close to the magnetic plate 20, a limiting groove 44 matched with the limiting rod 43 is formed in the magnetic plate 20, and specifically, a through hole matched with the limiting rod 43 is formed in the side wall, close to the magnetic plate 20, of the air supply outlet 16; the limit groove 44 laterally corresponds to the through hole when the magnetic plate 20 is lowered to the lowest position. In actual use, when the magnetic plate 20 descends to the position close to the lowest position, the magnetic plate is separated from the magnetic attraction piece 32 in a sliding way, the first baffle 17 starts to move to open the air supply outlet 16, then the first baffle 17 pushes the trigger piece 28 to trigger the rack 29 to move, the rack 29 drives the limit rod 43 to be inserted into the limit groove 44, the lowest position of the magnetic plate 20 is stabilized, and the button 36 is pressed by the second linkage frame 24 to keep the air supply outlet 15 open; then, when the backlight assembly 2 starts to shrink, the detection plate 3 moves back and rises, and then, the first baffle 17 moves back in linkage, and the magnetic plate 20 keeps the lowest position due to the limitation of the limiting rod 43, and the movement of the first baffle 17 still keeps being blocked at the upper side of the trigger 28, that is, the trigger 28 keeps the dumping position, that is, the limiting rod 43 also keeps being inserted into the limiting groove 44, so that the magnetic plate 20 does not move back immediately at the initial stage of heat dissipation and recovery of the backlight assembly 2, the air supply fan 15 does not stop running immediately, and when the backlight assembly 2 moves back to a certain extent, the first baffle 17 moves back and also meets the requirement of not blocking the trigger 28 any more, the first gear 27 starts to rotate under the action of the torsion spring 37, so that the rack 29 drives the limiting rod 43 to move back to leave the limiting groove 44, and then, the magnetic plate 20 can move back and rise under the action of the compression rod 22 and the second elastic member 25, and the second linkage frame 24 is separated from the button 36, and the air supply fan 15 stops running, thereby solving the problems of intermittent stop, short and frequent start and stop of the air supply fan 15.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (7)
1. The utility model provides a backlight unit display screen with heat radiation structure, includes casing (1), be provided with backlight unit (2) in casing (1), backlight unit (2) upper end offsets with the interior top surface of casing (1) and sets up, its characterized in that still includes:
a detection plate (3) movably disposed in the housing (1) and positioned at the lower side of the backlight assembly (2);
the anti-press plate (4) is arranged between the backlight assembly (2) and the detection plate (3), a plurality of lamp grooves (5) are formed in the anti-press plate, lamp strips (6) are clamped between the anti-press plate and the detection plate (3), and lamp beads of the lamp strips (6) are embedded into the lamp grooves (5);
the radiating window assembly is linked with the detection plate (3), and a radiating opening is formed on the shell (1) under the pushing of the detection plate (3) by the thermal expansion of the backlight assembly (2);
the inner bottom surface of the shell (1) is provided with a plurality of first elastic pieces (7) connected with the detection plate (3), two symmetrical check blocks (8) are fixedly arranged on the inner wall of the shell (1), and the detection plate (3) and the anti-pressing plate (4) are limited between the two check blocks (8) to move;
the radiating window assembly comprises a window (9) formed in the side wall of the shell (1), a window plate (10) is rotatably arranged in the window (9), and the rotation of the window plate (10) is linked with the movement of the detection plate (3);
the lifting type detection device is characterized in that a first connecting rod (11) is arranged in the shell (1) in a lifting mode, the first connecting rod (11) is fixedly connected with the end portion of the detection plate (3), a first linkage frame (12) is arranged on the first connecting rod (11), and a first linkage pin (13) which is linked with the first linkage frame (12) is arranged on the window plate (10).
2. The backlight module display screen with the heat radiation structure according to claim 1, characterized in that an air supply bin (14) is arranged at the lower end of the shell (1), an air supply fan (15) is arranged at one side of the air supply bin (14), an air supply opening (16) is arranged between the air supply bin (14) and the shell (1) for communicating, a first baffle (17) for controlling the opening and the closing of the air supply opening (16) is movably arranged in the shell (1), and the first baffle (17) is linked with the detection plate (3).
3. The backlight module display screen with the heat dissipation structure according to claim 2, wherein a second connecting rod (18) is hinged to the lower end of the detection plate (3), the other end of the second connecting rod (18) is connected with a first baffle (17), a flange (19) is fixedly arranged in the shell (1), and the first baffle (17) moves in a translation mode between the inner bottom surface of the shell (1) and the flange (19).
4. The backlight module display screen with the heat dissipation structure according to claim 2, wherein the lower end of the housing (1) movably penetrates through the magnetic plate (20), the magnetic plate (20) is arranged in a lifting manner, and when the magnetic plate is at the lowest end of the lifting travel, the magnetic plate is shielded in an air supply path between the air supply fan (15) and the air supply port (16), and the cleaning brushes (21) for clamping two opposite sides of the magnetic plate (20) are fixedly arranged on the inner top surface of the air supply bin (14).
5. The backlight module display screen with the heat dissipation structure according to claim 4, wherein a pressing rod (22) is hinged to the inner bottom surface of the shell (1), a second linkage pin (23) is arranged at the free end of the pressing rod (22), a second linkage frame (24) linked with the second linkage pin (23) is arranged at the upper end of the magnetic plate (20), and a second elastic piece (25) is arranged between the lower side of the pressing rod (22) and the inner bottom surface of the shell (1).
6. The backlight module display screen with the heat dissipation structure according to claim 2, wherein the lower end of the air supply bin (14) is opened, and is hinged with a second baffle (26), and the second baffle (26) is linked with the first baffle (17) through a linkage assembly.
7. The backlight module display screen with the heat dissipation structure according to claim 6, wherein the linkage assembly comprises a first gear (27) rotatably arranged on the inner bottom surface of the housing (1), a trigger piece (28) capable of extending upwards out of the inner bottom surface of the housing (1) to be in the movable stroke of the first baffle (17) is fixedly arranged on the first gear (27), a second gear (30) is linked with the first gear (27) through a rack (29), and the second gear (30) is linked with one end of the second baffle (26) through an eccentric pull rod (31).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311127611.8A CN117234003B (en) | 2023-09-04 | 2023-09-04 | Backlight module display screen with heat radiation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311127611.8A CN117234003B (en) | 2023-09-04 | 2023-09-04 | Backlight module display screen with heat radiation structure |
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| CN117234003A CN117234003A (en) | 2023-12-15 |
| CN117234003B true CN117234003B (en) | 2024-03-05 |
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| CN117234003A (en) | 2023-12-15 |
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