Disclosure of Invention
The purpose of this application is to provide a backlight unit and on-vehicle display device, can reduce the loss of electric quantity, reaches the effect of power saving.
The application discloses backlight module, the backlight module includes the backplate and sets up the electricity storage subassembly and at least one electricity generation subassembly on the backplate, the backplate includes relative first curb plate and the second curb plate that sets up, electricity generation subassembly sets up first curb plate with between the second curb plate, including first spring, magnet inner core and shell, the one end of first spring with first curb plate is connected, the other end of first spring with magnet inner core is connected; the shell is sleeved with a coil, and the coil is connected with the electricity storage component; one end of the shell is connected with the second side plate, the other end of the shell is an open end, and the open end faces the first spring; the magnet inner core is inserted into the shell through the opening end of the shell and is connected with the shell in a sliding way in a first direction; wherein the first direction is the expansion and contraction direction of the first spring.
Optionally, the magnet inner core includes a fixed column, a fixed sheet and at least one first magnet block, at least one installation position is arranged in the fixed column, the first magnet block is correspondingly installed in the installation position, and a window is arranged on the side wall of the fixed column corresponding to the position of the first magnet block; the fixing piece is fixed at one end of the fixing column, which faces the first spring, through a screw, a notch is formed in the side wall of the fixing piece, and one end, away from the first side plate, of the first spring penetrates through the notch to be fixed between the fixing piece and the end part of the fixing column.
Optionally, the backlight module further includes a magnet auxiliary assembly, the magnet auxiliary assembly is located at one end of the housing far away from the magnet inner core, and the magnet auxiliary assembly includes a second magnet block; when the magnet inner core slides towards the direction approaching to the magnet auxiliary assembly, the first magnetic surface of the second magnet block is opposite to the magnet inner core and is attracted with the first magnet block; when the magnet inner core slides towards the direction far away from the magnet auxiliary assembly, the second magnetic surface of the second magnet block is opposite to the magnet inner core and mutually repels the first magnet block.
Optionally, the magnet auxiliary assembly further includes a frame body, a fixing shaft and two fixing pins, the frame body is connected with the side wall of the second magnet block, the fixing shaft penetrates through the frame body and the second magnet block along the direction perpendicular to the side wall of the second magnet block, and two ends of the fixing shaft respectively penetrate through the side wall of the shell and extend to the outside of the shell; the two fixing pins penetrate through the fixing shaft along the direction perpendicular to the central axis of the fixing shaft respectively and protrude out of the surface of the fixing shaft; the frame body is provided with a bump, the inner wall of the shell is provided with a first limiting block and a second limiting block, and the first limiting block and the second limiting block are respectively positioned at two sides of the magnet auxiliary assembly and correspond to the bump; the length direction of the lug is perpendicular to the axis direction of the fixed shaft.
The magnet inner core further comprises at least one extension rod, and the extension rod is connected with one end of the fixed column, which faces the magnet auxiliary assembly, and is opposite to the magnet auxiliary assembly; when the magnet inner core slides towards the direction close to the magnet auxiliary assembly, the extension rod contacts the magnet auxiliary assembly and pushes the second magnet block to rotate around the positive direction of the fixed shaft, so that the protruding block is abutted against the first limiting block, and the first magnetic surface of the second magnet block is opposite to the magnet inner core; when the magnet inner core slides towards the direction far away from the magnet auxiliary assembly, the extension rod pulls the second magnet block to rotate around the opposite direction of the fixed shaft, so that the protruding block is abutted with the second limiting block, and the second magnetic surface of the second magnet block is opposite to the magnet inner core.
Optionally, the magnet inner core includes a first extension rod and a second extension rod, where the first extension rod and the second extension rod are respectively located at two sides of the second magnet block and located at the same side of the fixed shaft, and tangent to the fixed shaft; the fixed shaft is provided with a first clearance gap and a second clearance gap, and the first clearance gap and the second clearance gap are respectively positioned at two sides of the fixed shaft and are respectively arranged corresponding to the first extension rod and the second extension rod.
Optionally, at least one chute is provided on the inner wall of the housing, and the chute extends towards the first direction; the extension rods protrude out of the side walls of the fixed columns, correspond to the sliding grooves one by one and are in sliding connection with the sliding grooves.
Optionally, the backlight module further includes a power conversion assembly, where the power conversion assembly includes a driving column, a driving pin, a pulley, a second spring, a sliding rod and a fixed substrate, the fixed substrate is connected with the first side plate, the sliding rod is fixed on the fixed substrate and is parallel to the first side plate, the pulley is slidably connected with the sliding rod, slides along a track of the sliding rod, one end of the second spring is connected with the pulley, and the other end of the second spring is connected with the fixed substrate; one end of the transmission column is directly connected with the first spring, the other end of the transmission column is connected with the transmission pin, and the transmission pin penetrates through the transmission column along the direction perpendicular to the central axis of the transmission column and is in sliding fit with a slideway on the pulley; when the transmission pin slides on the slideway, the distance between the first spring and the first side plate is gradually changed.
Optionally, the pulley is disposed at a side of the first side plate away from the second side plate, the first spring and the driving pin are respectively located at two sides of the first side plate, and the driving column penetrates through the first side plate and is respectively connected with the first spring and the driving pin; the pulley comprises a pulley body, wheels and a fixed clamping plate, wherein the wheels are fixed on the pulley body and are in rolling fit with the first side plate; the fixed clamping plate is arranged on the vehicle body and is matched with the vehicle body to fix one end of the second spring; the two sides of the vehicle body are respectively provided with the slide way, the slide way is arc-shaped, the transmission pin is from the two ends of the slide way to the center, and the distance between the transmission pin and the first side plate is gradually reduced; the transmission column is inserted into the vehicle body, and the transmission pins penetrate through the transmission column and are respectively connected with the slide ways on two sides of the vehicle body in a matched mode.
Optionally, the back plate further comprises a bottom plate, a main body side plate and a supporting plate which are integrally formed, the bottom plate and the supporting plate are respectively and vertically connected with two ends of the main body side plate, the main body side plate is arranged around the edge of the bottom plate, and the supporting plate is arranged around the main body side plate; the first side plate and the main body side plate are of an integrated structure, the area of the main body side plate corresponding to the second side plate is hollowed out, and the second side plate is fixedly connected with the main body side plate through screws; the power conversion assembly is located between the supporting plate and the plane where the bottom plate is located, and orthographic projection of the supporting plate on the plane where the bottom plate is located covers orthographic projection of the power conversion assembly on the plane where the bottom plate is located.
The application also discloses a vehicle-mounted display device, the vehicle-mounted display device includes display panel and as above backlight unit, backlight unit is for display panel provides the backlight.
According to the power generation device, the power storage component and the power generation component are additionally arranged in the backlight module, the kinetic energy generated when the backlight module shakes and shakes is utilized, the first spring drives the magnet inner core to do cutting magnetic induction line movement in the coil on the shell, so that the power generation component generates electric energy, and finally the electric energy generated by the power generation component is stored in the power storage component, so that the power storage component serves as a standby battery to supply power to a display product, and the purposes of saving electric energy and reducing battery loss are achieved.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
Furthermore, unless expressly specified and limited otherwise, "connected" and "coupled" are to be construed broadly, and may be either permanently connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Embodiment one:
fig. 1 is a schematic view of a vehicle-mounted display device in a first embodiment of the present application, as shown in fig. 1, the embodiment of the present application provides a vehicle-mounted display device 10, where the vehicle-mounted display device 10 is installed in a vehicle, may be installed in a sunroof of the vehicle, may be installed in a central control area or other positions of the vehicle, and is powered by a battery of the vehicle.
The vehicle-mounted display device 10 comprises a display panel 30 and a backlight module 20, wherein the backlight module 20 provides a backlight source for the display panel 30.
As shown in fig. 2, as the backlight module provided in the embodiment of the present application, the backlight module 20 includes a back plate 100, and a power storage assembly (not shown in the figure) and a plurality of power generation assemblies 200 disposed on the back plate 100, so that the power generation efficiency is improved by the plurality of power generation assemblies 200; of course, the backlight module 20 may have only one power generation assembly 200 or two power generation assemblies 200, and is specifically selected according to practical situations, which is not limited herein.
The back plate 100 includes a bottom plate 110, a body side plate 140, and a support plate 150, and the bottom plate 110 and the support plate 150 are parallel and are disposed perpendicular to the body side plate 140. Wherein the bottom plate 110 is connected with the bottom of the main body side plate 140, and the main body side plate 140 is arranged around the bottom plate 110; the support plate 150 is coupled to the top of the body side plate 140, and the support plate 150 is disposed around the body side plate 140. Wherein the plurality of power generation assemblies 200 are located in an area surrounded by the bottom plate 110 and the body side plate 140, and the display panel 30, the optical film, and other optical structures are fixed on the support plate 150.
Preferably, the bottom plate 110, the main body side plate 140 and the supporting plate 150 are integrated, and are integrated profiles, so that the structure is stable and the processing is convenient.
The back plate 100 further includes a first side plate 120 and a second side plate 130 that are disposed opposite to each other, the first side plate 120 is a part of the main body side plate 140, and the second side plate 130 and the main body side plate 140 are in a split structure, at this time, the main body side plate 140 corresponds to the hollow area of the second side plate 130, and the second side plate 130 is fixedly connected with the main body side plate 140 through a screw 223, so that the second side plate 130 is convenient to be detached. Of course, the second side plate 130 and the main body side plate 140 may be an integral structure, at this time, the first side plate 120 and the second side plate 130 are opposite sides of the main body side plate 140, and the main body side plate 140 is of an annular structure connected end to end, which is beneficial to guaranteeing the overall strength of the main body side plate 140 and reducing the design difficulty of the main body side plate 140.
The plurality of power generation assemblies 200 are sequentially arranged between the first side plate 120 and the second side plate 130 in parallel and at intervals, each power generation assembly 200 comprises a first spring 210, a magnet inner core 220 and a housing 230, and the first spring 210, the magnet inner core 220 and the housing 230 in each power generation assembly 200 are arranged on the same straight line.
One end of the first spring 210 is directly connected to the first side plate 120, and the other end of the first spring 210 is connected to the magnet core 220.
As shown in fig. 3, for the connection between the first spring 210 and the magnet core 220, the magnet core 220 includes a fixing post 221 and a fixing piece 222, wherein the fixing post 221 is recessed inward toward one end of the first spring 210, and the fixing piece 222 is fixed in a recessed area of the fixing post 221 toward the first spring 210 by a screw 223; moreover, a notch 2221 is provided on a side wall of the fixing piece 222, and an end of the first spring 210, which is far away from the first side plate 120, passes through the notch 2221 and is clamped and fixed by the fixing piece 222 and an end of the fixing post 221, so as to improve the connection strength of the first spring 210. As for the connection manner of the first spring 210 and the first side plate 120, the fixing may be performed by clamping with a pressing plate, welding, or the like.
As shown in fig. 4, the present application also discloses a specific design of the magnet core 220, where the magnet core 220 includes a plurality of first magnet blocks 227 in addition to the fixing posts 221 and the fixing pieces 222, and each of the first magnet blocks 227 has a cubic structure. The fixing column 221 is hollow, and is provided with a plurality of mounting positions spaced along the length direction of the fixing column 221, and the first magnet block 227 is correspondingly mounted in the mounting positions to ensure the stability of the first magnet block 227 in the fixing column 221; the side wall of the fixing column 221 is provided with a window 2211 corresponding to each first magnet block 227, and the first magnet blocks 227 inside the fixing column 221 are exposed through the window 2211; the window 2211 may be located at one side of the first magnet block 227, or may be located at two or more sides of the first magnet block 227.
It can be understood that, in the magnet core 220, only one first magnet block 227 or two first magnet blocks 227 may be provided, and the number of mounting positions is correspondingly set; however, the power generation efficiency can be ensured by increasing the volume of the first magnet block 227, for example, when there is only one first magnet block 227, the first magnet block 227 has a long strip shape.
In this embodiment, the housing 230 is sleeved with the coil 240, that is, the coil 240 is wound on the housing 230, at least one layer of the coil 240 is wound around the housing 230, and the coil 240 is connected with the electricity storage component.
The power storage component is a power storage film or other power storage products, and is connected with the control chip of the vehicle-mounted display device 10 to provide electric energy for the backlight module 20 and the driving circuit.
One end of the housing 230 is connected to the second side plate 130, and the other end of the housing 230 is an open end, and the open end faces the first spring 210; the magnet core 220 is inserted into the inside of the housing 230 through the open end of the housing 230, and is slidably coupled to the housing 230 in a first direction; wherein the first direction is a telescoping direction of the first spring 210.
According to the embodiment of the application, the power storage component and the power generation component 200 are additionally arranged in the backlight module 20, the kinetic energy generated when the backlight module 20 shakes and shakes is utilized, the magnet inner core 220 is driven to slide back and forth in the outer shell 230 through the stretching and shrinking of the first spring 210, the first magnet block 227 in the magnet inner core 220 makes cutting magnetic induction line motion in the coil 240 on the outer shell 230, the power generation component 200 generates electric energy, and finally the electric energy generated by the power generation component 200 is stored in the power storage component, so that the power storage component serves as a standby battery to supply power to a display product, and the power consumption pressure of the storage battery in an automobile can be relieved through the self-generating structure in the backlight module 20, so that the purposes of saving electric energy and reducing battery loss are achieved.
In this embodiment, the housings 230 of the multiple power generating assemblies 200 are all directly fixed on the second side plate 130 by screws 223, and in the assembly process, the first springs 210 and the magnet inner cores 220 can be connected first, all the first springs 210 are connected to the first side plate 120, all the housings 230 are connected to the second side plate 130, then the second side plate 130 is mounted on the main body side plate 140, and the magnet inner cores 220 are controlled to be inserted into the housings 230, so that the purpose of convenient assembly is achieved.
Embodiment two:
fig. 5 is a schematic combination diagram of a power generation assembly and a magnet auxiliary assembly according to a second embodiment of the present application, fig. 6 is a schematic cross-sectional view of fig. 5 at AA', and, with reference to fig. 5 and fig. 6, a magnet auxiliary assembly 400 is additionally added in the backlight module 20 according to the embodiment of the present application, and the magnet auxiliary assembly 400 is located at an end of the housing 230 away from the magnet core 220, and the magnet auxiliary assembly 400 includes a second magnet block 410.
When the magnet core 220 slides in a direction approaching the magnet auxiliary assembly 400, the first magnetic surface of the second magnet block 410 is opposite to the magnet core 220 and attracts to each other with the first magnet block 227, so that the advancing distance of the magnet core 220 is further lengthened; when the magnet core 220 slides away from the magnet assembly 400, the second magnetic surface of the second magnet piece 410 faces the magnet core 220 and repels the first magnet piece 227, so that the backward movement distance of the magnet core 220 also increases.
Through this design in the embodiment of the present application, the distance that the magnet core 220 travels inside the housing 230 and inside the coil 240 is increased by the magnet auxiliary assembly 400, so that the work done by each round trip movement of the magnet core 220 is more, and the power generation efficiency of the power generation assembly 200 is higher. Moreover, as the distance that the magnet core 220 travels inside the housing 230 and inside the coil 240 increases, the first spring 210 stretches and contracts to a greater extent, and the deformation is more pronounced, so that the force applied to the magnet core 220 is greater, so that the magnet core 220 moves faster inside the housing 230, which is also advantageous for improving the power generation efficiency of the power generation assembly 200.
Fig. 7 is a schematic view of a magnet assisting assembly according to an embodiment of the present application, and as shown in fig. 7, the magnet assisting assembly 400 includes a frame 420, a fixing shaft 430 and two fixing pins 440 in addition to the second magnet block 410.
The second magnet block 410 has a rectangular structure, and has two larger planes, namely a first magnetic surface and a second magnetic surface, which can be also understood as the front surface and the back surface of the second magnet block 410; the second magnet piece 410 also has four smaller flat surfaces, four sides of the second magnet piece 410, respectively. Through this design, can ensure the effect of second magnet piece 410 to first magnet piece 227 in magnet inner core 220, can reduce the whole weight of second magnet piece 410 again, make things convenient for the rotation of second magnet piece 410.
The frame 420 with the side of second magnet piece 410 is connected, specifically can encircle one side of second magnet piece 410, also can encircle both sides or the multiaspect of second magnet piece 410, and this embodiment preferably frame 420 adopts the plastics material, and as an organic whole structure, wraps up in the four sides of second magnet piece 410 through joint, bonding etc. mode, prevents that the magnetic force that the side of second magnet piece 410 produced from producing the interference to the motion of magnet inner core 220, can also improve the joint strength between frame 420 and the second magnet piece 410.
As shown in fig. 7 and 8, the second magnet block 410 and the side surface of the frame 420 are provided with circular through holes penetrating through them, the fixing shaft 430 is inserted into the circular through holes, and both ends of the fixing shaft 430 are exposed from both sides of the frame 420, i.e., the fixing shaft 430 penetrates through the frame 420 and the second magnet block 410 in a direction perpendicular to the side wall of the second magnet block 410.
Meanwhile, through holes are respectively formed at two ends of the outer shell 230 corresponding to the fixed shaft 430, specifically, two circular truncated cones 234 may be disposed on the outer wall of the outer shell 230, then holes are formed in the circular truncated cones 234, and the circular truncated cones 234 are penetrated to form through holes. The both ends of the fixing shaft 430 also pass through the through-holes formed at the side walls of the housing 230 and extend to the outside of the housing 230, respectively, when the magnet assisting assembly 400 is assembled into the housing 230. And, the two ends of the fixed shaft 430 are respectively provided with a bolt hole, the central axis of the bolt hole is perpendicular to the central axis of the fixed shaft 430, two fixing pins 440 are respectively inserted into the corresponding bolt holes and connected with the fixed shaft 430, and the length of each fixing pin 440 is greater than the diameter of the opening on the round table 234, so that the fixing pins 440 respectively penetrate through the fixed shaft 430 along the direction perpendicular to the central axis of the fixed shaft 430 and protrude out of the surface of the fixed shaft 430, and the fixed shaft 430 is prevented from falling off from the housing 230.
As shown in fig. 6 and fig. 7, the frame 420 is provided with a bump 421, the bump 421 is located on a side of the frame 420 where no via hole is formed, and the bump 421 is perpendicular to the sidewall of the second magnet block 410, which may also be understood that the length direction of the bump 421 is perpendicular to the axial direction of the fixed shaft 430.
Correspondingly, a first limiting block 232 and a second limiting block 233 are disposed on the inner wall of the housing 230, and the first limiting block 232 and the second limiting block 233 are respectively located on two sides of the magnet auxiliary assembly 400 and correspond to the protruding block 421, that is, a connection line of the first limiting block 232 and the second limiting block 233 is perpendicular to the central axis of the fixed shaft 430.
As an implementation manner of this embodiment of the present application, as shown in fig. 7 and 9, the magnet core 220 further includes two extension rods 226, that is, a first extension rod 224 and a second extension rod 225, where the first extension rod 224 and the second extension rod 225 are respectively connected to one end of the fixing post 221 toward the magnet auxiliary assembly 400, extend toward the direction of the magnet auxiliary assembly 400, and are opposite to the magnet auxiliary assembly 400. Further, the first extension rod 224 and the second extension rod 225 are positioned at both sides of the second magnet block 410, respectively, and positioned at the same side of the fixed shaft 430, tangential to the fixed shaft 430.
Correspondingly, the fixed shaft 430 is provided with a first avoidance space 431 and a second avoidance space 432, and the first avoidance space 431 and the second avoidance space 432 are respectively located at two sides of the fixed shaft 430 and are respectively disposed corresponding to the first extension rod 224 and the second extension rod 225.
Meanwhile, one end of the fixing column 221, which faces the second magnet block 410, is an open end so as to expose the first magnet block 227 inside the fixing column 221, so that no shielding exists between the first magnet block 227 and the second magnet block 410, and the magnetic force acting effect between the first magnet block 227 and the second magnet block 410 is guaranteed.
It can be appreciated that the fixed shaft 430 is in a shape of a circular rod, the first avoidance space 431 and the second avoidance space 432 are respectively notches on the fixed shaft 430, and when the fixed shaft 430 rotates until the avoidance space is opposite to the extension rod 226, the fixed shaft 430 is not in contact with the extension rod 226; when the fixed shaft 430 rotates to the non-avoidance portion opposite to the extension rod 226, the fixed shaft 430 contacts with the extension rod 226, and drives the fixed shaft 430 to rotate back and forth along with the extension rod 226.
When the magnet core 220 slides in a direction approaching the magnet auxiliary assembly 400, the extension rod 226 contacts the magnet auxiliary assembly 400 and pushes the second magnet block 410 to rotate around the fixed shaft 430 in a positive direction, so that the protrusion 421 is abutted against the first stopper 232 and the first magnetic surface of the second magnet block 410 is opposite to the magnet core 220; when the magnet core 220 slides away from the magnet auxiliary assembly 400, the extension rod 226 pulls the second magnet block 410 to rotate around the fixed shaft 430 in the opposite direction, so that the protrusion 421 abuts against the second stopper 233, and the second magnetic surface of the second magnet block 410 faces the magnet core 220.
As shown in fig. 6A to 6F, in the process of the first spring 210 being extended downward in fig. 6A, the magnet core 220 is slid toward a direction approaching the magnet auxiliary assembly 400, the lower end of the first extension rod 224 is brought into contact with the fixed shaft 430, the fixed shaft 430 and the second magnet block 410 are pushed to be turned in a clockwise direction (positive direction), and the lower end of the second extension rod 225 is opposite to the second avoidance space 432, and is not brought into contact with the fixed shaft 430.
In fig. 6B, the first extension rod 224 pushes the fixed shaft 430 and the second magnet block 410 to turn over 90 degrees, and at the beginning of the next moment, the first extension rod 224 and the second extension rod 225 have no contact portions with the fixed shaft 430, but the second magnet block 410 continues to rotate due to inertia.
In fig. 6C, when the second magnet block 410 rotates to a horizontal state under the action of inertia and gravity, the bump 421 abuts against the first stopper 232, at this time, the second magnet block 410 is blocked, and the magnetic pole overturning action is completed, at this time, the opposite surfaces of the first magnet block 227 and the second magnet block 410 are opposite poles and attract each other, so that the first spring 210 stretches longer due to the attraction of the magnet in the stretching process.
In fig. 6D, when the first spring 210 is extended to the limit position, it starts to shrink upward, the magnet core 220 slides in a direction away from the magnet auxiliary assembly 400, while the first extension rod 224 is opposite to the first avoidance space 431, the first extension rod 224 has no contact with the fixed shaft 430, but the second extension rod 225 is in contact with the fixed shaft 430, and at the next moment, the first extension rod 224 and the second extension rod 225 move upward, and the fixed shaft 430 and the second magnet block 410 start to rotate counterclockwise (in the opposite direction) under the driving of the second extension rod 225.
In fig. 6E, when the second magnet block 410 is rotated 90 degrees counterclockwise, the first extension rod 224 and the second extension rod 225 do not have any contact portion with the fixed shaft 430 at the beginning of the next moment, but the fixed shaft 430 and the second magnet block 410 continue to rotate due to inertia.
In fig. 6F, when the second magnet block 410 rotates to a horizontal state under the action of inertia and gravity, the bump 421 abuts against the second stopper 233, the second magnet block 410 completes the pole turning action, and the opposite faces of the first magnet block 227 and the second magnet block 410 are homopolar and repel each other, so that the first spring 210 has the effect of magnet repulsion during the contraction process, and therefore contracts to be shorter.
Fig. 6A to 6D are front cross-sectional views, and fig. 6E and 6F are rear cross-sectional views.
Further, the first extension rod 224 and the second extension rod 225 are also positioned at the side wall of the end portion of the fixing post 221 such that the first extension rod 224 and the second extension rod 225 protrude from the side wall of the fixing post 221 in a direction perpendicular to the central axis of the fixing post 221.
Meanwhile, as shown in fig. 8, two sliding grooves 231 corresponding to the first extending rod 224 and the second extending rod 225 are provided on the inner wall of the housing 230, the two sliding grooves 231 extend along the length direction of the housing 230, and two ends of the sliding groove 231 are flush with two ends of the housing 230, and the first extending rod 224 and the second extending rod 225 are slidably engaged with the corresponding sliding grooves 231, respectively. When the power generation assembly 200 is assembled, the extension rod 226 and the second extension rod 225 are directly aligned with the corresponding sliding groove 231 and slid in, so that alignment is facilitated. In addition, in the process of operating the power generation assembly 200, the first extension rod 224 and the second extension rod 225 can limit the magnet core 220 by combining with the sliding groove 231 in the housing 230 in addition to controlling the second magnet block 410 to turn over, so as to prevent the magnet core 220 from rotating around the axial direction of the housing 230 in the housing 230, and thus the elasticity of the first spring 210 and the magnetic force between the first magnet block 227 and the second magnet block 410 are lost.
It should be noted that, in the first embodiment, at least one extension rod 226 may be disposed in the magnet core 220, and a corresponding sliding slot 231 is disposed on the inner wall of the housing 230, so as to facilitate the installation and alignment of the magnet core 220, and ensure the sliding effect of the magnet core 220 in the housing 230.
In another embodiment, as shown in fig. 10, the magnet core 220 may have only one extension rod 226, and the fixed shaft 430 has no space, the extension rod 226 is tangent to the fixed shaft 430, and the extension rod 226 is in contact with the fixed shaft 430 regardless of whether the first spring 210 is extended or contracted. When the first spring 210 is in the stretching process, the extension rod 226 contacts with the fixed shaft 430 and drives the second magnet block 410 to turn clockwise until the bump 421 on the frame 420 is abutted against the first limiting block 232, so that the opposite surfaces of the first magnet block 227 and the second magnet block 410 are opposite poles, and the magnetic attraction between the first magnet block 227 and the second magnet block 410 attracts the first spring 210 to further stretch; when the first spring 210 is in the shrinking process, the extension rod 226 contacts with the fixed shaft 430 and drives the second magnet block 410 to turn over in the counterclockwise direction until the protruding block 421 on the frame 420 abuts against the second limiting block 233, so that the opposite surfaces of the first magnet block 227 and the second magnet block 410 are homopolar, and the repulsive force between the first magnet block 227 and the second magnet block 410 presses the first spring 210 to shrink further.
Of course, according to specific situations, more than three extension rods 226 may be provided on the magnet inner core 220, corresponding sliding grooves 231 are provided on the inner wall of the outer shell 230, and corresponding avoidance spaces are provided on the fixed shaft 430.
In another embodiment, a push rod is arranged in the inner core of the magnet inner core 220, and no extension rod 226 is arranged, the push rod corresponds to the edge of the frame 420, the end part of the push rod is in a barb shape, when the first spring 210 is in a stretching process, the push rod pushes the second magnet block 410 to turn clockwise until a bump 421 on the frame 420 is abutted with the first limiting block 232, so that the opposite surfaces of the first magnet block 227 and the second magnet block 410 are opposite; when the first spring 210 is in the contraction process, the barb at the end of the ejector rod pulls the second magnet block 410 to turn over in the anticlockwise direction until the protruding block 421 on the frame 420 is abutted with the second limiting block 233, so that the opposite surfaces of the first magnet block 227 and the second magnet block 410 are homopolar.
Of course, in other embodiments, the magnet auxiliary assembly 400 may be designed in other manners, so that when the magnet core 220 slides toward the direction approaching to the magnet auxiliary assembly 400, the first magnetic surface of the second magnet block 410 is opposite to the first magnet block 227, and the two magnets attract each other; when the magnet core 220 slides away from the magnet assembly 400, the second magnetic surface of the second magnet block 410 faces the first magnet block 227, and the two magnets repel each other.
Embodiment III:
fig. 11 is a schematic diagram of a backlight module according to a third embodiment of the present application, as shown in fig. 11, in comparison to the second embodiment, a power conversion assembly 300 is additionally added to the backlight module 20 according to the present application, and the power conversion assembly 300 is located below the support plate 150 and outside the first side plate 120, i.e. on a side of the first side plate 120 away from the second side plate 130. By the design, the spare space in the backlight module 20 is reasonably utilized, and the overlarge volume of the backlight module 20 is avoided; moreover, the power conversion assembly 300 does not affect the operation of the first spring 210, and does not occupy the space inside the back plate 100, which results in a problem that the deformation degree of the first spring 210 is reduced to affect the power generation efficiency.
Of course, in other embodiments, it is also possible to make the power conversion assembly 300 between the first side plate 120 and the second side plate 130, and fix it to the first side plate 120.
In the embodiment of the present application, as shown in fig. 12 and 13, the power conversion assembly 300 includes a driving post 310, a driving pin 320, a pulley 330, a second spring 340, a sliding rod 350, and a fixing base plate 360, wherein the fixing base plate 360 is the housing 230 of the power conversion assembly 300, and the fixing base plate 360 surrounds the driving pin 320, the pulley 330, the second spring 340, and the sliding rod 350 and is fixedly connected with the first side plate 120.
The two sliding rods 350 are disposed in parallel, and the ends of the two sliding rods 350 are fixed on the fixed base plate 360 and disposed in parallel with the first side plate 120.
The pulley 330 is provided with through holes corresponding to the two sliding rods 350, the sliding rods 350 penetrate through the through holes on the pulley 330, so that the pulley 330 is in sliding connection with the sliding rods 350, and the pulley 330 can slide along the track of the sliding rods 350 under the action of external force.
The extending and contracting direction of the second spring 340 is the same as the length direction of the second side plate 130, one end of the second spring 340 is connected to the pulley 330, and the other end of the second spring 340 is connected to the fixed substrate 360. The transmission column 310 penetrates through the second side plate 130, one end of the transmission column 310 is directly connected with the first spring 210, the other end of the transmission column 310 is connected with the transmission pin 320, and the transmission pin 320 penetrates through the transmission column 310 along the direction perpendicular to the central axis of the transmission column 310 and is in sliding fit with the slide way 3311 on the pulley 330; as the drive pin 320 slides on the slide 3311, the spacing between the first spring 210 and the first side plate 120 gradually changes.
In the embodiment of the present application, since the extension direction of the first spring 210 is perpendicular to the first side plate 120, the extension direction of the second spring 340 is the same as the length direction of the first side plate 120, and when the force applied to the vehicle-mounted display device 10 is only perpendicular to the first side plate 120, the power generation assembly 200 can directly work; when the acting force applied to the vehicle-mounted display device 10 is the same as the length direction of the first side board 120, the pulley 330 moves on the sliding rod 350, and at this time, the slide 3311 on the pulley 330 slides around the driving pin 320, so that the distance between the driving pin 320 and the first side edge changes, and further the first spring 210 deforms, and the power generation assembly 200 is driven to operate. The power conversion assembly 300 is additionally arranged, so that the power generation assembly 200 can be found in various environments, and the adaptability of display products is improved.
Specifically, the pulley 330 includes a vehicle body 331, wheels 332 and a fixing plate 333, where the wheels 332 are fixed on the vehicle body 331 and are in rolling fit with the first side plate 120; the fixing clamp 333 is disposed on the vehicle 331 and cooperates with the vehicle 331 to fix one end of the second spring 340; the two sides of the vehicle body 331 are respectively provided with a slide 3311, the slide 3311 is arc-shaped, the transmission pin 320 is from two ends of the slide 3311 to the center, and the distance between the transmission pin 320 and the first side plate 120 is gradually reduced; the driving post 310 is inserted into the vehicle body 331, and the driving pin 320 passes through the driving post 310 to be respectively connected with the slide rails 3311 on two sides of the vehicle body 331 in a matching way.
Illustratively: the backlight module 20 is opposite to the front of the driver in the automobile, and the first side plate 120 and the second side plate 130 are perpendicular to the horizontal plane. When the automobile turns or adjusts the direction during running, the first spring 210 receives power, and the power generation assembly 200 starts to work; when the automobile shakes, goes up and down a slope, the second spring 340 receives power and transmits the power to the first spring 210, so that the power generation assembly 200 starts to work; when the vehicle is subjected to the hybrid power, the power conversion assembly 300 and the power generation assembly 200 operate simultaneously.
In other embodiments, the extending direction of the second spring 340 may be the same as the width direction of the first side board 120, and the sliding rod 350, the driving pin 320, the pulley 330 and the fixed base board 360 are correspondingly adapted, so that the power conversion assembly 300 can transmit power to the power generation assembly 200 when the speed of the automobile changes during driving.
In other embodiments, the backlight module 20 may have only the power generation assembly 200 and the power conversion assembly 300 without the magnet auxiliary assembly 400.
It should be noted that, in the above embodiment, when the backlight module 20 has no power conversion assembly 300, the first spring 210 is directly connected to the first side plate 120; when the backlight module 20 has the power conversion assembly 300, the first spring 210 is connected to the first side plate 120 sequentially through the driving post 310, the driving pin 320, the pulley 330, the sliding rod 350, the fixed substrate 360, and the first side plate 120, where the first spring 210 is indirectly connected to the first side plate 120; but whatever the connection or embodiment, the first spring 210 is connected to the first side plate 120.
In the present application, the backlight module 20 may be used in other mobile display products, such as mobile phones, notebooks, etc., but is not limited to the field of vehicle display.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.