CN210062350U - Light guide plate rolling device - Google Patents
Light guide plate rolling device Download PDFInfo
- Publication number
- CN210062350U CN210062350U CN201920518146.3U CN201920518146U CN210062350U CN 210062350 U CN210062350 U CN 210062350U CN 201920518146 U CN201920518146 U CN 201920518146U CN 210062350 U CN210062350 U CN 210062350U
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- roller
- light guide
- guide plate
- frame
- base
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- 238000005096 rolling process Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 22
- 238000007639 printing Methods 0.000 claims description 7
- 238000013519 translation Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model provides a light guide plate rolling device, which comprises a roller frame and a roller set arranged on the roller frame, wherein the roller set comprises a first roller and a second roller which are arranged up and down; the roller frame is provided with a distance adjusting device for adjusting the distance between the first roller and the second roller; and a printed board with a dot structure is arranged on the surface of the first roller or the second roller. The utility model provides a light guide plate roll-in device can adapt to the light guide plate of different specifications, improves light guide plate machining efficiency and finished product quality.
Description
Technical Field
The utility model relates to a light guide plate field, concretely relates to light guide plate roll-in device.
Background
The liquid crystal backlight is a planar uniform lighting device, and cold cathode fluorescent lamps or LED lamp strips serving as light sources are arranged on two sides or one side of the whole backlight source. The cold cathode lamp tube is a linear light source, the LED is a point light source, and a light guide plate is needed for converting the light source into a surface light source. The light guide plate functions to guide a scattering direction of light, to improve the brightness of the panel, and to ensure uniformity of the brightness of the panel.
At present, most of domestic manufacturers adopt a printed light guide plate as a light guide component, the printed light guide plate is made of a high-reflectivity and non-light-absorbing material (such as propylene) on an acrylic flat plate, and screen printing is used for printing mesh points on the bottom surface of the light guide plate, so that the printed light guide plate has the advantages of low development cost and quick production. The point light source is arranged at the side of the light guide plate, the light emitted by the point light source is guided into the light guide plate by reflection, and when the light rays irradiate the mesh points, the reflected light can be diffused towards all angles and is emitted from the front surface of the light guide plate. The mesh points can be in the structure of square, diamond, round, semicircular and elliptic mesh point structures so as to adjust the uniformity of the light source selected in the front direction; the size of the light source is from centimeter level to micron level, the smaller the mesh point is, the more careful the surface uniformity of the light source can be adjusted, and meanwhile, the damage of the mesh point pattern to the picture quality of the display can be avoided.
The screen printing mode is that ink is smeared at one end of a screen, the screen is provided with a reticular pattern, and when the light guide plate substrate runs below the screen, the ink is printed on the surface of the light guide plate substrate through the screen by the uniform motion of a scraper, so that a mesh point structure on the surface of the light guide plate is formed. Due to different ink coating uniformity of the scraper, the shape of the dot structure is unstable, the pattern precision is low, and the size of the dot structure is limited to be more than 300 micrometers.
Therefore, in the prior art, a device for rolling the light guide plate to process the mesh point structure by a plurality of rollers is provided, the pressure of the rollers facing the plate is uniform, the processing consistency of the mesh point structure is improved, and the light guide effect of the light guide plate is improved, so that the device is suitable for forming a large-size light guide plate at one time. However, due to the limited size and thickness of the product, the processing quality of the dot structure is not consistent. Moreover, the process for machining the mesh point structure on the roller is complex, and the diameter of the traditional roller is fixed; it is inconvenient to replace the rollers with different diameters according to different specification plates.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to the above-mentioned not enough that exists among the prior art and provide a light guide plate roll-in device and hot rolling technology, make its light guide plate panel processing of solving different specifications, and can not change the problem of the site structure on the running roller.
In order to realize part of the above purpose, the utility model adopts the following technical scheme:
a light guide plate rolling device comprises a roller frame and a roller set arranged on the roller frame, wherein the roller set comprises a first roller and a second roller which are arranged up and down; the roller frame is provided with a distance adjusting device for adjusting the distance between the first roller and the second roller; and a printed board with a dot structure is arranged on the surface of the first roller or the second roller.
Furthermore, the distance adjusting device comprises a sliding seat, a power machine and a screw lifting mechanism fixed on the roller frame; the sliding seat is connected to the roller frame in a sliding manner along the vertical direction; the second roller bearing is connected to the sliding seat; the input end of the screw lifting mechanism is connected with the output end of the power machine, and the output end of the screw lifting mechanism is connected with the sliding seat to drive the sliding seat to move in the vertical direction.
Further, the distance adjusting devices are divided into two groups; and the sliding seats of the two groups of distance adjusting devices are respectively connected with bearings at two ends of the second roller.
Furthermore, the number of the roller frames is two, and each roller frame is provided with a roller group; the printing plate on one roller frame is arranged on the first roller, and the printing plate on the other roller frame is arranged on the second roller.
Furthermore, the two roller frames comprise mounting brackets and fixing brackets with adjustable spacing; and two ends of the second roller are respectively rotatably arranged on the mounting bracket and the fixed bracket.
Further, the two roller frames comprise roller bases; the roller base is provided with parallel sliding rails along the axial direction of the first roller/the second roller; the fixed bracket is fixed on the roller base; the mounting bracket is arranged on the parallel sliding rails in a sliding manner towards the direction of the fixed bracket; the first roller of one of the roller sets is arranged on the roller base, and two ends of the second roller are respectively connected to the mounting bracket and the fixed bracket through bearings; the second roller of another roller set is arranged on the roller base, and two ends of the first roller are respectively connected to the mounting bracket and the fixing bracket through bearings.
Furthermore, the device also comprises a base, wherein the two roller frames are respectively arranged on the base through a horizontal adjusting mechanism, so that the two roller frames can relatively slide along the axial direction of the first roller/the second roller.
Furthermore, the horizontal adjusting mechanism comprises a plurality of slideways axially parallel to the first roller wheel/the second roller wheel, a driving motor, a mounting seat fixed on the base, two adjusting screw rods and a translation seat, wherein the slideways are arranged on the base; the translation seat is fixed on the roller frame; the plurality of slideways are matched with the bottom of the roller frame in a sliding manner.
Compared with the prior art, the utility model discloses following beneficial effect has:
the distance between the first roller and the second roller is controlled by the distance adjusting device, so that the device is suitable for light guide plates of different specifications, and the mesh point processing is more uniform; the dot structure is arranged on the printed board, so that the dot structure with different specifications is convenient to process and replace; the distance between the two ends of the first roller wheel/the second roller wheel is adjusted through the mounting bracket and the fixing bracket, so that the roller wheels with different lengths are adapted; when circuit fault occurs, the second roller and the light guide plate in the processing process are convenient to take down, and unnecessary loss is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic view of a first roller frame of the present invention;
fig. 2 is a schematic view of the distance adjusting device of the present invention;
fig. 3 is a schematic view of a second roller frame of the present invention;
fig. 4 is a schematic view of a second mounting bracket of the present invention;
fig. 5 is the installation schematic diagram of the horizontal adjustment mechanism of the present invention.
The following reference numerals are included: the device comprises a first roller 1, a second roller 2, a printed board 3, a sliding seat 4, a power machine 5, a pushing screw 6, a shell 7, a base 8, a roller base 9, a first mounting bracket 10, a first fixing bracket 11, a parallel sliding rail 12, a positioning screw 13, a second mounting bracket 14, a second fixing bracket 15, an upper base plate 16, a lower base plate 17, a mounting plate 18, a guide plate 19, a cart 20, a slideway 21, a driving motor 22 and a mounting seat 23.
Detailed Description
In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:
in the embodiment, as shown in fig. 1 to 5, the roller assembly includes a roller frame and a roller set installed on the roller frame, and the roller set includes a first roller 1 and a second roller 2 which are vertically arranged; the roller frame is provided with a distance adjusting device for adjusting the distance between the first roller 1 and the second roller 2; and a printed board 3 with a dot structure is arranged on the surface of the first roller 1 or the second roller 2.
The first roller 1 and the second roller 2 are respectively in bearing connection with a roller frame, a self-aligning roller bearing with the model number of GB/T288-94 is used, the printed board 3 is a stainless steel plate, an optical dot structure is processed on the plane of the printed board 3, and the optical dot structure is mounted on the first roller 1 or the second roller 2 after being coiled by a plate coiling machine or a coiling machine. Preferably, the first roller 1 or the second roller 2 has a smooth surface and is provided with a screw hole corresponding to the printed board for mounting the countersunk head screw. The mesh point structure is processed on the plane of the printed board 3, the processing is simpler on a roller of a roller, the concave bottom of the processed mesh point structure can be smooth, and the optical performance of the light guide plate is improved. The printed board 3 can be directly disassembled to replace the dot structure by sleeving and fixing the printed board 3 on the first roller 1.
As shown in fig. 2, the distance adjusting device comprises a sliding seat 4, a power machine 5 and a screw lifting mechanism fixed on a roller frame; the sliding seat 4 is connected to the roller frame in a sliding manner along the vertical direction; the second roller 2 is connected to the sliding seat 4 through a bearing; the input end of the screw lifting mechanism is connected with the output end of the power machine, and the output end of the screw lifting mechanism is connected with the sliding seat 4 to drive the sliding seat 4 to move in the vertical direction.
The power machine 5 can be a cylinder or a motor, the screw lifting mechanism comprises a shell, a worm wheel arranged in the shell, a pushing screw 6 in threaded connection with a central hole of the worm wheel and a worm meshed with the outer ring of the worm wheel, and the power machine 5 is fixed on the shell and an output shaft of the power machine is connected with the worm through a coupler. The power machine 5 controls the worm to drive the worm wheel to rotate, further drives the pushing screw 6 and the worm wheel to rotate relatively, and finally drives the sliding seat 4 on the pushing screw 6 to move up and down in the axial direction of the central hole of the worm wheel. The roller lifting mechanism is arranged on the roller frame through the shell 7, so that the distance adjusting devices can be conveniently assembled and disassembled on different roller frames.
The distance adjusting devices are divided into two groups; the sliding seats 4 of the two groups of distance adjusting devices are respectively connected with bearings at two ends of the second roller 2. The roller pressure of the first roller wheel 1 or the second roller wheel 2 is more uniform, and the structure quality of the processed mesh points is consistent.
The number of the roller frames is two, and each roller frame is provided with a roller group; the printing plate on one roller frame is arranged on the first roller 1, and the printing plate on the other roller frame is arranged on the second roller 2.
Specifically, the two roller frames are a first roller frame and a second roller frame which are arranged on the base 8 in parallel; the first roller wheel 1 and the second roller wheel 2 of the two roller wheel frames are arranged up and down. The first roller wheel 1 of the first roller wheel frame is provided with a printed board 3 with a dot structure, and the second roller wheel 2 of the second roller wheel frame is provided with a printed board 3 with a dot structure and is respectively connected with a heating device. The heating device is an oil temperature machine, the oil temperature machine takes heat conduction oil as a medium, and the heat conduction oil is guided into rollers of a first roller 1 and a second roller 2 which are provided with printed boards 3 with dot structures, so that the first roller 1 or the second roller 2 respectively presses hot rollers on the upper side surface and the lower side surface of the plate. The roller shafts of the first roller wheel 1 and the second roller wheel 2 on the two roller wheel frames are both connected with 1.5KW servo motors.
The first roller frame and the second roller frame both comprise mounting brackets and fixing brackets with adjustable spacing; and two ends of the second roller 2 are respectively rotatably arranged on the mounting bracket and the fixed bracket.
The first roller frame and the second roller frame both comprise roller bases 9; the roller base 9 is provided with parallel slide rails 12 along the axial direction of the first roller 1/the second roller 2; the fixed bracket is fixed on the roller base 9; the mounting bracket is arranged on the parallel sliding rails in a sliding manner towards the direction of the fixed bracket; the first roller 1 of one of the roller sets is arranged on the roller base 9, and two ends of the second roller 2 are respectively connected to the mounting bracket and the fixed bracket through bearings; the second roller 2 of another roller set is arranged on the roller base 9, and two ends of the first roller 1 are respectively connected on the mounting bracket and the fixed bracket through bearings.
As shown in fig. 1 and fig. 2, specifically, the roller base 9 of the first roller frame is a "u" shaped structure, and the mounting brackets and the fixing brackets are first mounting brackets 10 and first fixing brackets 11 which are arranged on two ends of the roller base 9 and have the same height; two ends of the second roller 2 are respectively connected on two opposite side walls of the roller base 9 through bearings. The number of the parallel slide rails 12 is two, the parallel slide rails are axially arranged at the upper end of one side wall of the roller base 9 along the second roller 2, the first mounting bracket 10 and the first fixing bracket 11 are in a shape of Jiong, two ends of the bottom of the first mounting bracket 10 are respectively in sliding fit with the two slide rails, and the first fixing bracket 11 is fixed at the upper end of the other side wall of the first roller frame relative to the first mounting bracket 10. The two groups of distance adjusting devices are respectively arranged on the first mounting bracket 10 and the first fixed bracket 11 in a vertically sliding manner; two ends of the first roller 1 are respectively connected with a sliding seat 4 of the distance adjusting device through bearings; the first mounting bracket 10 is fixedly connected with the roller base 9 through a positioning screw 13, and the positioning screw 13 is provided with a hand wheel.
As shown in fig. 3 and 4, the second roller frame includes a hollow type roller base 9, a second mounting bracket 14, and a second fixing bracket 15. The hollow roller base 9 comprises a lower base plate 17, support columns arranged around the lower base plate 17, and an upper base plate 16 fixed on the support columns. The second mounting bracket 14 and the second fixing bracket 15 are both in the shape of "Jiong", the second mounting bracket 14 and the second fixing bracket 15 are oppositely arranged on the upper bottom plate 16, and the height of the second mounting bracket 14 is the same as that of the second fixing bracket 15. The second mounting bracket 14 and the second fixing bracket 15 are oppositely arranged on the upper base plate 16, the mounting plates 18 are respectively arranged on the upper parts of the first mounting bracket 10 and the second fixing bracket 15, and the two mounting plates 18 are respectively connected with bearings at two ends of the first roller 1. The accommodation space of the lower part of the second mounting bracket 14 is larger than the upper part, the two opposite sides of the lower part of the second mounting bracket 14 are fixedly provided with guide plates 19, the two parallel slide rails 12 are axially arranged on the upper base plate 16 along the first roller 1, and the bottom ends of the two guide plates 19 are respectively connected with the two parallel slide rails 12 in a sliding manner. The two guide plates 19 are respectively fixed with the upper base plate 16 through the positioning screws 13, wherein the two positioning screws 13 are in transmission connection, and one positioning screw 13 is provided with a hand wheel. Because the second installing support 14 needs to install the first roller 1 and the second roller 2, the bearing is great, fixes through both sides below the second installing support 14, can strengthen the stability of second installing support 14. The second fixed mounting frame is fixed on the upper base plate 16, and two ends of the first roller 1 are respectively connected on the second mounting bracket 14 and the second fixed mounting frame through bearings. The two groups of distance adjusting devices are respectively arranged on the second mounting bracket 14 and the second fixing bracket 15 in a vertically sliding manner; two ends of the second roller 2 are respectively connected with a sliding seat 4 of the distance adjusting device through bearings.
Preferably, when the second roller wheel 2 on the second roller wheel frame is replaced, the cart 20 is placed on the upper bottom plate 16, the bearings at the two ends of the second roller wheel 2 are removed, then the second roller wheel 2 falls into the cart 20, the two sides of the cart 20 are clamped with the roller wheel shaft of the second roller wheel 2, and the second roller wheel 2 below the roller wheel frame is convenient to detach and transport; when the first roller wheel 1 of the first roller wheel frame needs to be replaced, the first roller wheel 1 is clamped through the lifting device, the bearings at two ends of the first roller wheel 1 are respectively taken down, and then the first roller wheel 1 is integrally moved out through the lifting device, so that the first roller wheel 1 above the roller wheel frame is convenient to disassemble and transport.
By respectively adjusting the distances between the first mounting bracket 10 and the second fixing bracket 15 and between the second mounting bracket 14 and the second fixing bracket 15, rollers with different lengths can be adapted to meet the requirements of rolling more plates with different specifications.
The roller frame further comprises a base 8, and the first roller frame and the second roller frame are respectively installed on the base 8 arranged at the bottom of the roller frame through a horizontal adjusting mechanism, so that the first roller frame and the second roller frame can relatively slide along the axial direction of the first roller 1/the second roller 2.
As shown in fig. 5, the horizontal adjusting mechanism comprises a plurality of slideways 21 which are arranged on the base 8 and are axially parallel to the first roller 1/the second roller 2, a driving motor 22, a mounting seat 23 fixed on the base 8, two adjusting screw rods which are arranged on the mounting seat 23 through bearings and connected to the output shaft of the driving motor 22, and a translation seat which is in threaded connection with the adjusting screw rods; the translation seat is fixed on the roller frame; the plurality of slide ways 21 are matched with the bottom of the roller frame in a sliding manner.
The two adjusting screw rods are respectively installed on the base 8 through angular contact ball bearings with the model number of GB/T292-94. After the first roller frame and the second roller frame move relatively in parallel, the first roller frame and the second roller frame are fixed through two adjusting screw rods respectively, so that the positions of a first roller 1 of the first roller frame and a second roller 2 of the second roller frame can be adjusted conveniently, and mesh point structures processed on the upper plate surface and the lower plate surface of the light guide plate are positioned respectively. The two adjusting screw rods are respectively connected with the two driving motors 22 through screw rod couplers, the model of the screw rod couplers is GFC55-78-22, the two driving motors 22 are fixed on the base 8, and the driving motors 22 are 1.5KW servo motors. The horizontal adjusting mechanism is controlled by the motor, so that the positioning of the first roller frame and the second roller frame is more convenient and accurate than the manual positioning.
Preferably, the device also comprises two fixed bases, the number of the bases 8 is two, and the first roller frame and the second roller frame are respectively arranged on the two bases 8; the two bases 8 are respectively installed on the fixed base through a vertical adjusting mechanism, so that the distance between the first roller frame and the second roller frame can be adjusted. The structure of the vertical adjusting mechanism is the same as that of the horizontal adjusting mechanism.
Finally, it is to be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced with other modifications, such as the selection of the motor, the hand wheel, the lifting device, the screw rod and the laser cutting machine, the conventional operation of the oil heating machine and the lifting device, and the installation of the bearing, etc., which are not repeated herein and do not depart from the spirit and scope of the technical solutions of the present invention, and the present invention should be covered in the scope of the claims of the present invention.
Claims (8)
1. The light guide plate rolling device is characterized by comprising a roller frame and a roller set arranged on the roller frame, wherein the roller set comprises a first roller and a second roller which are arranged up and down; the roller frame is provided with a distance adjusting device for adjusting the distance between the first roller and the second roller; and a printed board with a dot structure is arranged on the surface of the first roller or the second roller.
2. The light guide plate rolling device according to claim 1, wherein the distance adjusting device comprises a sliding seat, a power machine and a screw lifting mechanism fixed on a roller frame; the sliding seat is connected to the roller frame in a sliding manner along the vertical direction; the second roller bearing is connected to the sliding seat; the input end of the screw lifting mechanism is connected with the output end of the power machine, and the output end of the screw lifting mechanism is connected with the sliding seat to drive the sliding seat to move in the vertical direction.
3. The light guide plate rolling device according to claim 2, wherein the distance adjusting devices are two groups; and the sliding seats of the two groups of distance adjusting devices are respectively connected with bearings at two ends of the second roller.
4. The light guide plate rolling device according to claim 1, wherein the number of the roller frames is two and each roller frame is provided with a roller set; the printing plate on one roller frame is arranged on the first roller, and the printing plate on the other roller frame is arranged on the second roller.
5. The light guide plate rolling device according to claim 4, wherein the two roller frames each comprise a mounting bracket and a fixing bracket with adjustable spacing; and two ends of the second roller are respectively rotatably arranged on the mounting bracket and the fixed bracket.
6. The light guide plate rolling device according to claim 5, wherein the two roller frames each comprise a roller base; the roller base is provided with parallel sliding rails along the axial direction of the first roller/the second roller; the fixed bracket is fixed on the roller base; the mounting bracket is arranged on the parallel sliding rails in a sliding manner towards the direction of the fixed bracket; the first roller of one of the roller sets is arranged on the roller base, and two ends of the second roller are respectively connected to the mounting bracket and the fixed bracket through bearings; the second roller of another roller set is arranged on the roller base, and two ends of the first roller are respectively connected to the mounting bracket and the fixing bracket through bearings.
7. The light guide plate rolling device according to claim 1, further comprising a base, wherein the two roller frames are respectively mounted on the base through a horizontal adjustment mechanism so as to be relatively slidable in the first roller/second roller axial direction.
8. The light guide plate rolling device according to claim 7, wherein the horizontal adjustment mechanism comprises a plurality of sliding ways axially parallel to the first roller/the second roller, a driving motor, a mounting seat fixed on the base, two adjusting screws with bearings mounted on the mounting seat and connected to output shafts of the driving motor, and a translation seat screwed on the adjusting screws; the translation seat is fixed on the roller frame; the plurality of slideways are matched with the bottom of the roller frame in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920518146.3U CN210062350U (en) | 2019-04-17 | 2019-04-17 | Light guide plate rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920518146.3U CN210062350U (en) | 2019-04-17 | 2019-04-17 | Light guide plate rolling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210062350U true CN210062350U (en) | 2020-02-14 |
Family
ID=69437203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920518146.3U Expired - Fee Related CN210062350U (en) | 2019-04-17 | 2019-04-17 | Light guide plate rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210062350U (en) |
-
2019
- 2019-04-17 CN CN201920518146.3U patent/CN210062350U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20200214 |