A cutting device for backlight finished product protective film

Abstract

The present invention discloses a cutting device for backlight finished product protective film, characterized in that it comprises: a fixing component, a guiding component and a film cutting component; the fixing component comprises: a bracket, a round rod and a bearing, the bearings are installed at both ends of the round rod, and the bearings are respectively fixed on the bracket; the guiding component comprises a roller and a transmission roller, and the two ends of the roller are fixed on the bracket; the film cutting component comprises: a sliding rod, a slider, a blade and an aluminum block, the sliding rod is connected to the slider, the blade is installed on the slider, the aluminum block is arranged directly below the slider, the two ends of the aluminum block are fixed on the bracket, and the blade is in contact with the outer vertical surface of the aluminum block. The present invention solves the problems of the unsightly appearance of the protective film when it is worn on the assembly line, the unevenness, unsightly appearance, inconvenience and unsafety of the protective film when it is rolled back during use, and the manual use of the blade to scratch the protective film.

Description

Technical Field

[0001] The present invention relates to the backlight industry manufacturing field, and in particular to a cutting device for a backlight finished product protective film. Background Art

[0002] The original method of fixing the protective film is that the roller passes through the protective film and is fixed at the end of the assembly line. During use, the protective film is too loose and rolled back. When replacing the protective film, the roller needs to be taken out and passed through the protective film to be fixed at the end of the assembly line. This design is not convenient for use and replacement; the film cutting method is to hold the blade with the right hand, press the protective film with the left hand, and put it on the film cutting platform for cutting. The protective film is not cut neatly. This design requires repeated extraction of the blade for cutting, which may hurt your hands if you are not careful;

[0003] The invention provides a cutting device for a backlight finished product protective film, which solves the problems of unsightly protective films when worn on an assembly line, unsightly protective films rolling back during use, and uneven, unsightly, inconvenient and unsafe protective films when manually scratched with a blade. Summary of the invention

[0004] A series of simplified concepts are introduced in the content of the invention, which will be further described in detail in the specific implementation method section; the content of the invention of the present invention does not mean to attempt to limit the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above-mentioned problems, the present invention provides a cutting device for backlight finished product protective film, characterized in that it includes: a fixing component, a guiding component, and a film cutting component; the fixing component includes: a bracket, a round rod and a bearing, the bearings are installed at both ends of the round rod, and the bearings are respectively fixed on the bracket; the guiding component includes a roller and a transmission roller, and the two ends of the roller are fixed on the bracket; the film cutting component includes: a sliding rod, a slider, a blade and an aluminum block, the sliding rod is connected to the slider, the blade is installed on the slider, the aluminum block is arranged directly below the slider, the two ends of the aluminum block are fixed on the bracket, and the blade is in contact with the outer vertical surface of the aluminum block.

[0006] Preferably, the bracket includes: a left bracket, a right bracket and a fixing plate; the left bracket and the right bracket are respectively located at two ends of the round rod, and the fixing plate connects the left bracket and the right bracket to fix the left bracket and the right bracket to be stably placed on a plane.

[0007] Preferably, the round rod includes: a first round rod, a second round rod and a third round rod, the first round rod, the second round rod and the third round rod are arranged in parallel, the first round rod and the third round rod have the same installation height, the second round rod is located between the first round rod and the third round rod, and the installation height of the second round rod is lower than that of the first round rod and the third round rod.

[0008] Preferably, eight bearings are provided, and the bearings are respectively arranged at both ends of the round rod and the roller, the round rod is fixed to the inner wall of the bearing, the roller is fixed to the inner wall of the bearing, the outer wall of the bearing is fixed to the bracket, four bearings are fixed to the left bracket, and the other four bearings are symmetrically arranged on the right bracket; the roller is located at the lower end between the fixing component and the film cutting component.

[0009] Preferably, the slider is provided with two through holes, the through holes have the same cross-sectional size as the slide rod, and the slider is provided with two threaded holes corresponding to the bolts;

[0010] Two slide bars are provided, and the slide bars are arranged parallel to the round rods. The slide bars pass through the sliders, and both ends of the slide bars are fixed on the brackets. The sliders move along the slide bar axes.

[0011] Preferably, the blade is provided with a through hole corresponding to the threaded hole of the slider, and the blade is fixed to the slider by bolts.

[0012] Preferably, a protective plate is provided on the outer side of the blade, the protective plate is in contact with the blade, the protective plate is provided with a through hole corresponding to the through hole of the blade, and the protective plate and the blade are fixed to the slider together by bolts; the lateral width of the protective plate is wider than the blade, and the vertical length of the protective plate is shorter than the blade.

[0013] Preferably, the transmission roller is arranged between the aluminum block and the roller, and both ends of the transmission roller are fixed on the bracket; the transmission roller is located on the other side of the aluminum block and the blade, and the transmission roller is used to transfer the protective film to between the aluminum block and the slider.

[0014] Preferably, the slider is installed with a lead screw nut, the lead screw nut passes through the slider, the direction of the lead screw nut hole is consistent with the axial direction of the sliding rod, a stepper motor is provided at one end of the bracket, the stepper motor is connected to the lead screw through a gear, and the lead screw nut installed on the slider is sleeved on the lead screw; sensing modules are provided at the left and right ends of the sliding rod, the sensing modules are connected to the stepper motor control system, and the control system is provided with a control button; the control button sends a start command to the control system, and the control system controls the stepper motor according to the start command and in combination with the data obtained by the sensing module, including: forward and reverse rotation.

[0015] Preferably, the stepper motor is provided with a closed-loop motion system, which includes: an operator, an actuator, a controller and a feedback module; the operator is located on the controller, and is mainly used for closed-loop algorithm processing, and the result of the algorithm processing is output to the controller for controlling and adjusting the output of the controller; the controller includes a driver program and a driver for the stepper motor, which are mainly used to realize motion control of the stepper motor, process and output the drive signal of the stepper motor; the feedback module includes a stepper motor driver chip, which is used to detect the loss of step of the stepper motor during operation.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The overall fixture is small in size, occupies little space, is beautiful overall, and the fixture can be moved and used at will;

[0018] 2. During use, the protective film should not be too loose or rolled back;

[0019] 3. You only need to slide the blade with your right hand to cut. The blade can cut from left to right or from right to left. There is no need to return to the starting point after cutting.

[0020] 4. Safe operation, no risk of injury.

[0021] The present invention provides a cutting device for a backlight finished product protective film. Other features and advantages of the present invention will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic cross-sectional structure diagram of a cutting device for a backlight finished product protective film according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of a top view of a cutting device for a backlight finished product protective film according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of a top view of a cutting device for a backlight finished product protective film according to an embodiment of the present invention;

[0027] Figure 4 The present invention is a schematic diagram of a protective film extension route of a cutting device for a backlight finished product protective film in an embodiment of the present invention.

[0028] In the figure: 1 fixed component, 2 film cutting component, 3 guide component, 4 round rod, 5 bracket, 6 bearing, 7 roller, 8 slide rod, 9 slider, 10 blade, 11 aluminum block, 12 fixed plate, 13 left bracket, 14 right bracket, 15 transmission roller, 21 first round rod, 22 second round rod, 23 third round rod. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] like Figure 1-4 As shown, an embodiment of the present invention provides a cutting device for a backlight finished product protective film, characterized in that it includes: a fixing component 1, a guiding component 3 and a film cutting component 2; the fixing component 1 includes: a bracket 5, a round rod 4 and a bearing 6, the bearings 6 are installed at both ends of the round rod 4, and the bearings 6 are respectively fixed on the bracket 5; the guiding component 3 includes a roller 7 and a transmission roller 15, and both ends of the roller 7 are fixed on the bracket 5; the film cutting component 2 includes: a sliding rod 8, a slider 9, a blade 10 and an aluminum block 11, the sliding rod 8 is connected to the slider 9, the blade 10 is installed on the slider 9, the aluminum block 11 is arranged directly below the slider 9, the two ends of the aluminum block 11 are fixed on the bracket 5, and the blade 10 is in contact with the outer vertical surface of the aluminum block 11.

[0031] The working principle of the above technical scheme is as follows: the scheme adopted in this embodiment is to set a fixing component 1, a guiding component 3 and a film cutting component 2; the fixing component 1 includes: a bracket 5, a round rod 4 and a bearing 6, the bearings 6 are installed at both ends of the round rod 4, and the bearings 6 are respectively fixed on the bracket 5; the guiding component 3 includes a roller 7 and a transmission roller 15, and the two ends of the roller 7 are fixed on the bracket 5; the film cutting component 2 includes: a sliding rod 8, a sliding block 9, a blade 10 and an aluminum block 11, the sliding rod 8 is connected to the sliding block 9, the blade 10 is installed on the sliding block 9, the aluminum block 11 is arranged directly below the sliding block 9, the two ends of the aluminum block 11 are fixed on the bracket 5, and the blade 10 is in contact with the outer vertical surface of the aluminum block 11.

[0032] Specifically, through the above-mentioned setting, the bracket 5 fixes the bearing 6, and the bearing 6 fixes the round rod 4. When in use, the protective film is directly placed on the round rod 4, and the round rod 4 is in contact with the protective film. The round rod 4 holds up the protective film, and one end of the protective film passes under the roller 7, and then passes between the aluminum block 11 and the slider 9. When in use, the protective film is pulled, and the protective film drives the roller 7 to rotate, and generates friction with the contact surface of the round rod 4, and the friction drives the round rod 4 and the inner wall of the bearing 6 to rotate. The friction force will continue to exist as the protective film is pulled, so that the protective film always maintains a stable state when rotating; when the action of pulling the protective film disappears, the contact surface between the protective film and the round rod 4 does not generate friction, and the round rod 4 always supports the protective film, so that the protective film is never too loose or rolled back; when the protective film is pulled to a certain appropriate length, the slider 9 is dragged axially along the slide rod 8, and the slider 9 drives the blade 10 to move, and the blade 10 fits the aluminum block 11 to cut the protective film to obtain the cut protective film.

[0033] The beneficial effects of the above technical solution are as follows: the arrangement of the round rod 4 and the bearing 6 provided in the solution of this embodiment helps to prevent the protective film from being too loose or rolling back during use, and is easy to replace, and the protective film can be directly placed on the round rod 4; the blade 10 is fixed on the slider 9, and the slider 9 is fixed on the slide rod 8, which helps to improve the safety of equipment use. The operator can cut by sliding the slider 9, and can cut from left to right or from right to left. There is no need to return to the original point after cutting, and there is no need to repeatedly advance the blade 10, which can ensure the neatness of the cutting of the protective film.

[0034] In another embodiment, the bracket 5 includes: a left bracket 13, a right bracket 14 and a fixing plate 12; the left bracket 13 and the right bracket 14 are respectively located at the two ends of the round rod 4, and the fixing plate 12 connects the left bracket 13 and the right bracket 14 to fix the left bracket 13 and the right bracket 14 to be stably placed on a plane.

[0035] The working principle of the above technical solution is: the solution adopted in this embodiment is to set a left bracket 13, a right bracket 14, and a fixing plate 12; the left bracket 13 and the right bracket 14 are arranged opposite to each other, and the fixing plate 12 connects the left bracket 13 and the right bracket 14, and is used to fix the left bracket 13 and the right bracket 14 to be stably placed on a plane.

[0036] Specifically, through the above-mentioned setting, the left bracket 13 and the right bracket 14 are two plates, and the fixed plate 12 connects the opposite surfaces of the left bracket 13 and the right bracket 14, so that the left bracket 13 and the right bracket 14 can stand on the operating table. In order to improve the stability of the bracket, a plurality of the fixed plates 12 can be set, and anti-slip pads are set at the bottom of the left bracket 13 and the right bracket 14. When in use, when the operator pulls the protective film, the friction between the protective film and the round rod 4 is less than the friction between the bracket 5 and the operating table. The bracket 5 can also be fixed to the operating table by bolts, and the bracket 5 can be stably placed on the operating table.

[0037] The beneficial effect of the above technical solution is that the solution provided in this embodiment helps to improve the overall stability of the device, and the anti-slip pad helps to improve the stability of the device during use.

[0038] In another embodiment, the round rod 4 includes: a first round rod 21, a second round rod 22 and a third round rod 23, the first round rod 21, the second round rod 22 and the third round rod 23 are arranged in parallel, the first round rod 21 and the third round rod 23 are installed at the same height, the second round rod 22 is located between the first round rod 21 and the third round rod 23, and the installation height of the second round rod 22 is lower than that of the first round rod 21 and the third round rod 23.

[0039] The working principle of the above technical solution is as follows: the solution adopted in this embodiment is to set a first round rod 21, a second round rod 22 and a third round rod 23, the first round rod 21, the second round rod 22 and the third round rod 23 are arranged in parallel, the first round rod 21 and the third round rod 23 are installed at the same height, the second round rod 22 is located between the first round rod 21 and the third round rod 23, and the installation height of the second round rod 22 is lower than that of the first round rod 21 and the third round rod 23;

[0040] Specifically, through the above-mentioned arrangement, the first round rod 21, the second round rod 22 and the third round rod 23 form an inverted triangle structure. When in use, the protective film is placed on the second round rod 22, and the second round rod 22 supports the protective film. The first round rod 21 and the third round rod 23 support the protective film on both sides of the protective film. The distance between the first round rod 21 and the second round rod 22 is smaller than the diameter of the protective film paper tube, and the distance between the second round rod 22 and the third round rod 23 is smaller than the diameter of the protective film paper tube. The first round rod 21, the second round rod 22 and the third round rod 23 hold up the protective film as a whole. When in use, the protective film is pulled, and the protective film and the first round rod 21, the second round rod 22 and the third round rod 23 generate friction, which drives the first round rod 21, the second round rod 22 and the third round rod 23 to rotate, and the protective film can smoothly rotate on the round rods.

[0041] The beneficial effects of the above technical solution are: the solution provided in this embodiment is helpful for the stability of the protective film when used. When the protective film is pulled, the protective film can rotate smoothly on the round rod 4 to prevent the protective film from being too loose or rolling back. In addition, the replacement of the protective film is convenient and simple, and the protective film can be directly placed on the round rod 4 for use.

[0042] In another embodiment, eight bearings 6 are provided, and the bearings 6 are respectively arranged at both ends of the round rod 4 and the roller 7, the round rod 4 is fixed to the inner wall of the bearing 6, the roller 7 is fixed to the inner wall of the bearing 6, the outer wall of the bearing 6 is fixed to the bracket 5, four bearings are fixed to the left bracket 13, and the other four bearings are symmetrically arranged on the right bracket 14; the roller 7 is located at the lower end between the fixing component 1 and the film cutting component 2.

[0043] The working principle of the above technical scheme is: the scheme adopted in this embodiment is to set eight bearings 6, and the bearings 6 are respectively arranged at the two ends of the round rod 4 and the roller 7, the round rod 4 is fixed to the inner wall of the bearing 6, the roller 7 is fixed to the inner wall of the bearing 6, the outer wall of the bearing 6 is fixed to the bracket 5, four bearings 6 are fixed to the left bracket 13, and the other four bearings 6 are symmetrically arranged on the right bracket 14; the roller 7 is located at the lower end between the fixing component 1 and the film cutting component 2.

[0044] Specifically, through the above-mentioned arrangement, the bearing 6 is fixed at both ends of the round rod 4 and the roller 7, so that the roller 7 and the round rod 4 are fixed on the bracket 5, and the protective film is placed on the round rod 4. When in use, the operator pulls the protective film, and the protective film drives the roller 7 to rotate and generates friction with the contact surface of the round rod 4. The friction drives the round rod 4 and the inner wall of the bearing 6 to rotate. The friction will continue to exist with the action of pulling the protective film, so that the protective film always maintains a stable state during rotation; when the action of pulling the protective film disappears, the contact surface between the protective film and the round rod 4 does not generate friction, and the round rod 4 always supports the protective film, so that the protective film is never too loose or rolled back; the protective film is passed through the lower end of the roller 7. When the protective film is pulled, the protective film generates friction with the roller 7, and the friction drives the roller 7 to rotate and pass through the lower end of the roller 7, thereby avoiding the contact between the slider 9 of the film cutting component 2 and the protective film, and preventing the slider 9 from damaging the integrity of the protective film.

[0045] The beneficial effects of the above technical solution are: the arrangement of the round rod 4 and the bearing 6 in the solution provided in this embodiment helps to prevent the protective film from being too loose or rolling back during use; the roller 7 helps to pass the protective film from the lower end of the roller 7, avoiding contact between the protective film and the slider 9 when the protective film is pulled, and preventing the slider 9 from damaging the integrity of the protective film from the rear end during cutting.

[0046] In another embodiment, the slider 9 is provided with two through holes, the through holes have the same cross-sectional size as the slide bar 8, and the slider 9 is provided with two threaded holes corresponding to the bolts;

[0047] There are two slide rods 8 , which are arranged parallel to the round rod 4 . The slide rods 8 pass through the slider 9 . Both ends of the slide rods 8 are fixed on the bracket 5 . The slider 9 moves along the axis of the slide rod 8 .

[0048] The working principle of the above technical solution is: the solution adopted in this embodiment is that the slider 9 is provided with two through holes, the through holes have the same cross-sectional size as the slide rod 8, and the slider 9 is provided with two threaded holes corresponding to the bolts; there are two slide rods 8, the slide rods 8 are arranged parallel to the round rod 4, the slide rod 8 passes through the slider 9, the two ends of the slide rod 8 are fixed on the bracket 5, and the slider 9 moves along the axis of the slide rod 8.

[0049] Specifically, through the above-mentioned setting, the slider 9 is provided with two through holes for passing the slide rod 8, so that the slider 9 is installed on the slide rod 8, and the slider 9 moves on the slide rod 8, so that the slider 9 drives the blade 10 to move on the slide rod 8; the slider 9 is provided with threaded holes corresponding to the bolts, which are used to fix the blade 10 on the slider 9 by bolts.

[0050] The beneficial effects of the above technical solution are: the stepper motor, the control system, and the control button provided in this embodiment help to improve the safety of equipment use, and the operator operates the slider 9 to drive the blade 10 to cut the protective film without touching the slider 9; the two slide bars 8 are provided to help fix the slider 9, so that the slider 9 moves more smoothly, and the slider 9 will not deviate or delay the rotation of the slide bar 8.

[0051] In another embodiment, the blade 10 is provided with a through hole corresponding to the threaded hole of the slider 9, and the blade 10 is fixed to the slider 9 by bolts.

[0052] The working principle of the above technical solution is as follows: the solution adopted in this embodiment is that the blade 10 is provided with a through hole corresponding to the groove of the slider 9, the through hole of the blade 10 corresponds to the groove of the slider 9, and the blade 10 is fixed to the slider 9 by bolts;

[0053] Specifically, through the above-mentioned setting, the blade 10 is provided with two through holes corresponding to the threaded holes of the slider 9. Bolts pass through the through holes of the blade 10 and enter the threaded holes of the slider 9 to fix the blade 10. It is also possible to set multiple through holes on the blade 10 and set corresponding threaded holes on the slider 9. The blade 10 is fixed to the slider 9 by bolts, so that the blade 10 is more stable when cutting the protective film.

[0054] The beneficial effect of the above technical solution is that the blade 10 provided with two through holes in the solution provided by this embodiment helps the blade 10 to be more stable when cutting the protective film.

[0055] In another embodiment, a protective plate is provided on the outer side of the blade 10, the protective plate is in contact with the blade 10, the protective plate is provided with a through hole corresponding to the through hole of the blade 10, and the protective plate and the blade 10 are fixed to the slider 9 together by bolts; the lateral width of the protective plate is wider than that of the blade 10, and the vertical length of the protective plate is shorter than that of the blade 10.

[0056] The working principle of the above technical solution is: the solution adopted in this embodiment is to set a protective plate on the outside of the blade 10, the protective plate is in contact with the blade 10, the protective plate is provided with a through hole corresponding to the through hole of the blade 10, and the protective plate and the blade 10 are fixed together on the slider 9 by bolts; the lateral width of the protective plate is wider than the blade 10, and the vertical length of the protective plate is shorter than the blade 10.

[0057] Specifically, through the above-mentioned arrangement, the through hole on the protective plate corresponds to the through hole of the blade 10, the bolt first passes through the protective plate, then passes through the blade 10, and enters the threaded hole of the slider 9, and the protective plate and the blade 10 are fixed to the slider 9 together. The bottom position of the protective plate is aligned with the horizontal position of the bottom surface of the slider 9, and the horizontal position of the bottom of the blade 10 is lower than the horizontal position of the bottom surface of the slider 9, so that the blade 10 protrudes and can cut the protective film.

[0058] The beneficial effects of the above technical solution are as follows: the protective plate provided in the solution of this embodiment helps to wrap the useless part of the blade 10. The blade 10 is mounted on the slider 9. The protective plate is installed without hurting the hand. The operator needs to frequently touch the slider 9 during use to avoid the blade 10 scratching the operator, thereby improving the safety of the equipment during use.

[0059] In another embodiment, the transmission roller 15 is arranged between the aluminum block 11 and the roller 7, and both ends of the transmission roller 15 are fixed on the bracket 5; the transmission roller 15 is located on the other side where the aluminum block 11 and the blade 10 are attached, and the transmission roller 15 is used to transfer the protective film to between the aluminum block 11 and the slider 9.

[0060] The working principle of the above technical solution is: the solution adopted in this embodiment is to set a transmission roller 15, which is set between the aluminum block 11 and the roller 7, and both ends of the transmission roller 15 are fixed on the bracket 5. The transmission roller 15 is located on the other side where the aluminum block 11 and the blade 10 are in contact, and the transmission roller 15 is used to transfer the protective film to between the aluminum block 11 and the slider 9.

[0061] Specifically, through the above-mentioned setting, bearings 6 are provided at both ends of the transmission roller 15. When in use, the protective film passes from under the roller 7, then passes from above the transmission roller 15, and finally passes from between the aluminum block 11 and the slider 9. When the operator pulls the protective film, the pulling force generated will be converted into the friction force between the protective film and the transmission roller 15. The friction force drives the transmission roller 15 to rotate, so that the protective film can be smoothly transported from the transmission roller 15. Another way is to place the first round rod 21, the second round rod 22, and the third round rod 23. The roller 7 and the transmission roller 15 are connected to a micro motor on the same side, wherein the micro motor connected to the roller 7 has a different rotation direction from the other micro motors, and the micro motor is connected to the control system. When the operator presses the control button, the slider 9 stops moving from left to right or from right to left, and the control system controls the micro motor to work. The micro motor drives the round rod 4, the roller 7, and the transmission roller 15 to rotate, thereby driving the protective film to rotate. The transmission roller 15 outputs a small section of the protective film, thereby facilitating the operator to pull it.

[0062] The beneficial effect of the above technical solution is: the transmission roller 15 provided by the solution of this embodiment is used to prevent the protective film from being damaged by the other side of the aluminum block 11 and the blade 10 during the pulling process, thereby ensuring the integrity of the cutting of the protective film.

[0063] In another embodiment, the slider 9 is installed with a lead screw nut, and the lead screw nut penetrates the slider 9, and the direction of the lead screw nut hole is consistent with the axial direction of the slide rod 8. A stepper motor is provided at one end of the bracket 4, and the stepper motor is connected to the lead screw through a gear, and the lead screw nut installed on the slider 9 is sleeved on the lead screw; sensing modules are provided at the left and right ends of the slide rod 8, and the sensing modules are connected to the stepper motor control system, and the control system is provided with a control button; the control button sends a start command to the control system, and the control system controls the stepper motor according to the start command and in combination with the data obtained by the sensing module, including: forward and reverse rotation.

[0064] The working principle of the above technical scheme is: the scheme adopted in this embodiment is to install a screw nut on the slider 9, the screw nut penetrates the slider 9, the direction of the screw nut hole is consistent with the axial direction of the slide rod 8, a stepper motor is provided at one end of the bracket 4, the stepper motor and the screw rod are connected through gears, and the screw nut installed on the slider 9 is sleeved on the screw rod; sensing modules are provided at the left and right ends of the slide rod 8, the sensing modules are connected to the stepper motor control system, and the control system is provided with a control button; the control button sends a start command to the control system, and the control system controls the stepper motor according to the start command and in combination with the data obtained by the sensing module, including: forward and reverse rotation.

[0065] Specifically, through the above-mentioned setting, the gear is driven to rotate by the stepper motor, the gear drives the lead screw to rotate, the lead screw nut converts the rotational motion into linear motion, and the lead screw nut is driven to move by the forward and reverse rotation of the stepper motor, and the lead screw nut drives the slider 9 to move from left to right or from right to left on the slider 8; the left and right ends of the slider 8 are provided with sensing modules, when it is sensed that the slider 9 moves to the rightmost side, the stepper motor can only transmit to the left, when it is sensed that the slider 9 is on the leftmost side, the stepper motor can only transmit to the right, the stepper motor is connected to a control system, the control system is connected to the sensing module, and a control button is provided, when the control button is pressed, the control button sends a start instruction to the control system, and the control system controls the stepper motor according to the start instruction and the data obtained by the sensing module, including: forward and reverse rotation; the control button can be set on an operating table or on the ground, and the operator can operate it with his hands or feet according to his own usage habits.

[0066] The beneficial effects of the above technical solution are: setting the stepper motor according to the solution provided in this embodiment helps to reduce the operator's touching the slider to cut the protective film, making the blade cutting more stable, helping to improve the safety of equipment operation and the smoothness of the protective film cutting; and operating through the control button makes cutting simpler and more convenient.

[0067] In another embodiment, the stepper motor is provided with a closed-loop motion system, which includes: an operator, an actuator, a controller and a feedback module; the operator is located on the controller, and is mainly used for closed-loop algorithm processing, and the result of the algorithm processing is output to the controller for controlling and adjusting the output of the controller; the controller includes a driver program and a driver for the stepper motor, which are mainly used to realize motion control of the stepper motor, process and output the drive signal of the stepper motor; the feedback module includes a stepper motor driver chip, which is used to detect the loss of step when the stepper motor is working.

[0068] The working principle of the above technical solution is as follows: the solution adopted in this embodiment is closed-loop control, that is, after directly or indirectly detecting the speed of the stepper motor rotor comprehensively, the detected signal is returned to the input end of the control in the form of feedback as the controlled output, and then a certain algorithm processing is performed on the input end. After combining the rotation angle requirements of the stepper motor, the driving pulse sequence of the stepper motor is automatically given, and this driving pulse sequence changes with the change of the rotor position. In order to realize the closed-loop control of the stepper motor, the operator in the closed-loop motion system selects to use the incremental PID control algorithm to compensate for the error occurring during the movement of the stepper motor. According to the incremental PID control algorithm formula:

[0069] Δu(k)=(K p +K i +K d )e(k)-(K p +2K d )e(k-1)+K d e(k-2)

[0070] In the formula, Δu(k) represents the incremental value of the controller at the kth sampling, K p is the proportionality constant, K i represents the integration constant, K d Represents the differential constant, e(k) represents the difference between the kth given value and the feedback value, e(k-1) represents the difference between the k-1th given value and the feedback value, and e(k-2) represents the difference between the k-2th given value and the feedback value. Through incremental PID control, only three consecutive deviation values ​​need to be stored in the controller to obtain the increment of the controller output;

[0071] When the speed reflected by the stepper motor driver chip is different from the movement speed of the stepper motor, it will be promptly reflected to the stepper motor driver chip. If the stepper motor driver chip detects lost steps, it will continue to send pulses according to the difference to make up for the lost steps and complete the closed-loop control of the stepper motor.

[0072] The beneficial effect of the above technical solution is: the solution provided in this embodiment helps to avoid the step loss and jitter phenomenon that occurs when the stepper motor drives the slider to cut, making the blade cutting the protective film more stable and improving the integrity and aesthetics of the protective film cutting.

[0073] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cutting device for a backlight finished product protective film, characterized in that: include: A fixing component (1), a guide component (3), and a film cutting component (2); the fixing component (1) comprises: a bracket (5), a round rod (4), and a bearing (6); the bearings (6) are installed at both ends of the round rod (4), and the bearings (6) are respectively fixed to the bracket (5); the guide component (3) comprises a roller (7) and a transmission roller (15); both ends of the roller (7) are fixed to the bracket (5); the film cutting component (2) comprises: a sliding rod (8), a slider (9), a blade (10), and an aluminum block (11); the sliding rod (8) is connected to the slider (9); the blade (10) is installed on the slider (9); the aluminum block (11) is arranged directly below the slider (9); both ends of the aluminum block (11) are fixed to the bracket (5); and the blade (10) is in contact with the outer vertical surface of the aluminum block (11); The round rod (4) comprises: a first round rod (21), a second round rod (22) and a third round rod (23); the first round rod (21), the second round rod (22) and the third round rod (23) are arranged in parallel; the first round rod (21) and the third round rod (23) are installed at the same height; the second round rod (22) is located between the first round rod (21) and the third round rod (23); and the second round rod (22) is installed at a lower height than the first round rod (21) and the third round rod (23); The bracket (5) comprises: a left bracket (13), a right bracket (14), and a fixing plate (12); the left bracket (13) and the right bracket (14) are respectively located at two ends of the round rod (4); the fixing plate (12) connects the left bracket (13) and the right bracket (14) and is used to fix the left bracket (13) and the right bracket (14) so ​​that they are stably placed on a plane; There are eight bearings (6), and the bearings (6) are respectively arranged at the two ends of the round rod (4) and the roller (7). The round rod (4) is fixed to the inner wall of the bearing (6), the roller (7) is fixed to the inner wall of the bearing (6), and the outer wall of the bearing (6) is fixed to the bracket (5). Four bearings are fixed to the left bracket (13), and the other four bearings are symmetrically arranged on the right bracket (14); the roller (7) is located at the lower end between the fixing component (1) and the film cutting component (2); The slider (9) is provided with a lead screw nut, the lead screw nut penetrates the slider (9), the direction of the lead screw nut hole is consistent with the axial direction of the slider (8), one end of the bracket (5) is provided with a stepper motor, the stepper motor is connected to the lead screw via a gear, and the lead screw nut installed on the slider (9) is sleeved on the lead screw; sensing modules are provided at the left and right ends of the slider (8), the sensing modules are connected to the stepper motor control system, and the control system is provided with a control button; the control button sends a start command to the control system, and the control system controls the stepper motor according to the start command and the data obtained by the sensing module, including: forward rotation and reverse rotation; The stepper motor is provided with a closed-loop motion system, which includes: an operator, an actuator, a controller and a feedback module; the operator is located on the controller and is mainly used for closed-loop algorithm processing, and the result of the algorithm processing is output to the controller for controlling and adjusting the output of the controller; the controller includes a driver and a driver for the stepper motor, which are mainly used to realize the motion control of the stepper motor, process and output the driving signal of the stepper motor; the feedback module includes a stepper motor driver chip, which is used to detect the step loss of the stepper motor during operation; In order to realize the closed-loop control of the stepper motor, the operator in the closed-loop motion system chooses to use the incremental PID control algorithm to compensate for the error that occurs during the movement of the stepper motor. According to the incremental PID control algorithm formula: In the formula, represents the incremental value of the controller at the kth sampling time, is the proportionality constant, represents the integration constant, represents the differential constant, Represents the difference between the kth given value and the feedback value, Represents the difference between the k-1th given amount and the feedback amount, Represents the difference between the k-2th given value and the feedback value. Through incremental PID control, only three consecutive deviation values ​​need to be stored in the controller to obtain the increment of the controller output; When the speed reflected by the stepper motor driver chip is different from the movement speed of the stepper motor, it will be promptly reflected to the stepper motor driver chip. If the stepper motor driver chip detects lost steps, it will continue to send pulses according to the difference to make up for the lost steps and complete the closed-loop control of the stepper motor.

2. A cutting device for backlight finished product protective film according to claim 1, characterized in that: The slider (9) is provided with two through holes, the through holes have the same cross-sectional dimensions as the slide rod (8), and the slider (9) is provided with two threaded holes corresponding to the bolts; Two slide rods (8) are provided. The slide rods (8) are arranged parallel to the round rod (4). The slide rods (8) pass through the slider (9). Both ends of the slide rods (8) are fixed on the bracket (5). The slider (9) moves along the axis of the slide rod (8).

3. The cutting device for backlight finished product protective film according to claim 1, characterized in that: The blade (10) is provided with a through hole corresponding to the threaded hole of the slider (9), and the blade (10) is fixed to the slider (9) by means of bolts.

4. The cutting device for backlight finished product protective film according to claim 1, characterized in that: A protective plate is provided on the outer side of the blade (10), the protective plate is fitted with the blade (10), the protective plate is provided with a through hole corresponding to the through hole of the blade (10), and the protective plate and the blade (10) are fixed to the slider (9) together by bolts; the lateral width of the protective plate is wider than that of the blade (10), and the vertical length of the protective plate is shorter than that of the blade (10).

5. The cutting device for backlight finished product protective film according to claim 1, characterized in that: The transmission roller (15) is arranged between the aluminum block (11) and the roller (7), and both ends of the transmission roller (15) are fixed on the bracket (5); the transmission roller (15) is located on the other side where the aluminum block (11) and the blade (10) are in contact, and the transmission roller (15) is used to transmit the protective film to between the aluminum block (11) and the slider (9).

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