A cutting device for curved screen protective film

Abstract

The present invention relates to the technical field of cutting devices, and in particular to a cutting device for a curved screen protective film, comprising a bracket, a knife holder and an adjusting component. A plurality of cutting knives are initially set to be in a first position. If the edge of the protective film in the first direction is required to be wavy, the adjusting component adjusts the plurality of cutting knives to a first state of reciprocating swing. As the original film moves on the bracket, the plurality of cutting knives simultaneously cut the original film in the first direction. After a batch of original films are cut in the first direction, a retractor is used to adjust the original film to an initial state, the adjusting component switches the plurality of cutting knives to a second position, and the plurality of cutting knives in the second position cut the original film again. By adjusting the cutting knives when cutting the original film in the first direction, it is ensured that when the edge of the protective film in the first direction is required to be wavy, the waste of the original film is reduced. At the same time, the plurality of cutting knives can improve the efficiency of cutting the original film.

Description

Technical Field

[0001] The invention relates to the technical field of cutting devices, and in particular to a cutting device for a curved screen protective film. Background Art

[0002] With the continuous development of smartphone technology, curved screen phones have gradually become the mainstream of the market. In order to effectively protect such screens, the market demand for flexible protective films that can completely cover and fit the curved screen is increasing. The current flexible protective film cutting methods mainly include laser cutting and die punching. Although laser cutting has high cutting accuracy, it often produces a large amount of material waste when operating on a large area of ​​original film because it is impossible to maximize the use of the entire piece of material. This not only increases production costs, but also reduces the utilization rate of materials. In addition, during the laser cutting process, overheating may damage the original film and affect the quality of the protective film. As another common method, die punching, although relatively low in cost, has poor flexibility, especially for curved screens of different models and sizes, it is difficult to quickly adapt to the cutting needs of different shapes. The fixed-shape mold cannot flexibly respond to the diverse curved screen designs, the production efficiency is low, and the cutting accuracy is limited. It is difficult to meet the requirements of high-quality protective film cutting, affecting the final fitting effect. Summary of the invention

[0003] The present invention provides a cutting device for a curved screen protective film, so as to solve the problem that the existing cutting device cannot accurately cut the flexible curved screen protective film.

[0004] The cutting device of the curved screen protective film of the present invention adopts the following technical solution:

[0005] A device for cutting a curved screen protective film comprises a bracket, a knife holder and a regulating component.

[0006] The bracket is provided with a retractor, which is used to reel in or unreel the original film. When the retractor reels in or unreels the original film, the original film moves along the first direction on the bracket; a plurality of knife holders are provided, and the plurality of knife holders are provided on the bracket, and a cutting knife is provided on each knife holder, and the cutting knife has a first position parallel to the first direction and a second position perpendicular to the first direction; the regulating component is used to switch the cutting knife between the first position and the second position; when the cutting knife is in the first position, the regulating component can adjust the cutting knife to a first state of reciprocating swing, and the cutting knife in the first state has a preset angle with the first direction; a positioning rod is provided on the bracket, and the extension direction of the positioning rod is parallel to the first direction Vertically, the positioning rod is arranged parallel to the top of the original film; the extension direction of the knife holder is the same as the extension direction of the cutting knife, and the knife holder is rotatably connected to the positioning rod; the regulating component can regulate the extension direction of the knife holder to be parallel to the positioning rod, and the regulating component can also regulate the extension direction of the knife holder to be perpendicular to the positioning rod; the regulating component includes a first regulating rod, a second regulating rod and a first regulating source, the first regulating rod is arranged parallel to the positioning rod, the first regulating rod and the positioning rod are coplanar, and the distance between the first regulating rod and the positioning rod can be changed; one end of the second regulating rod is fixedly connected to the knife holder, and the other end of the second regulating rod is rotatably connected to the first regulating rod; the first regulating source is used to adjust the positioning rod to move back and forth in the direction of its own axis.

[0007] Furthermore, the regulating component also includes a second regulating source, and the second regulating source is used to adjust the movement of the first regulating rod along its own axis direction.

[0008] Furthermore, the regulating component also includes a compensation unit, which is used to compensate for the size of a preset angle between the tool holder and the first direction when the positioning rod moves along its own axial direction.

[0009] Furthermore, the compensation unit includes a compensation sleeve, which is coaxially arranged with the first regulating rod, and the compensation sleeve is slidably connected with the bracket along the first direction, and there is resistance when the compensation sleeve and the first regulating rod move relative to each other.

[0010] Furthermore, the compensation unit also includes an adjusting rod and a friction block. The friction block is arranged inside the compensation sleeve. The adjusting rod penetrates the side wall of the compensation sleeve along the radial direction of the compensation sleeve. The adjusting rod and the compensation sleeve are connected by threads. The adjusting rod is fixedly connected to the friction block, and the friction block is always in contact with the first adjustment rod.

[0011] Furthermore, the compensation unit also includes a damping baffle, a sealing rod and a sealing plate, the damping baffle is coaxially fixedly arranged inside the compensation sleeve, and the sealing plate is coaxially slidably and sealingly arranged inside the compensation sleeve; a damping hole is arranged on the damping baffle; the first regulating rod is inserted into the compensation sleeve; the sealing rod penetrates the side wall of the compensation sleeve and the damping baffle along the radial direction of the compensation sleeve, and the sealing rod is connected to the compensation sleeve by a threaded connection, and the sealing rod can change the size of the damping hole.

[0012] Furthermore, the second control source includes a second control cylinder and a compensation rod. The second control cylinder is slidably connected to the bracket in a first direction. One end of the compensation rod is fixedly connected to the power output end of the second control cylinder. The compensation rod can be telescopically arranged. A compensation spring is arranged inside the compensation rod. The other end of the compensation rod is arranged inside the compensation sleeve.

[0013] Furthermore, the first regulating source includes a first regulating cylinder, the first regulating cylinder is fixedly arranged on the bracket, and the power output end of the first regulating cylinder is fixedly connected to the positioning rod.

[0014] The beneficial effects of the present invention are as follows: a device for cutting a curved screen protective film of the present invention comprises a bracket, a knife holder and a regulating component. When cutting the curved screen protective film, a retractor flattens the original film on the bracket, and the retractor can drive the original film to move along a first direction on the bracket. A plurality of knife holders are arranged on the bracket, and a cutting knife is installed on the knife holder. In an initial state, a plurality of cutting knives are set to be in a first position. If the edge of the required protective film in the first direction is a straight line, the regulating component can stabilize the plurality of cutting knives in the first position. As the original film moves on the bracket, the plurality of cutting knives simultaneously cut the original film in the first direction. If the edge of the required protective film in the first direction is a wavy shape, the regulating component can stabilize the plurality of cutting knives in the first position. The control component adjusts the multiple cutting knives to a first state of reciprocating swing, and the cutting knives in the first state have a preset angle with the first direction. As the original film moves on the bracket, the multiple cutting knives simultaneously cut the original film in the first direction; after cutting a batch of original films in the first direction, the retractor is used to adjust the original film to an initial state, and the control component switches the multiple cutting knives to a second position, and the multiple cutting knives in the second position cut the original film again; by regulating the cutting knives when cutting the original film in the first direction, it is ensured that when the edge of the protective film in the first direction is wavy, the waste of the original film is reduced, and at the same time, the multiple cutting knives can improve the efficiency of cutting the original film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic structural diagram of a device for cutting a curved screen protective film provided by an embodiment of the present invention when a cutting knife is in a first position;

[0017] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0018] Figure 3 A top view of a cutting knife in a curved screen protective film cutting device provided by an embodiment of the present invention, in a first position;

[0019] Figure 4 for Figure 3 A partial enlarged view of the cutting knife at position B in the middle when it is in the first position;

[0020] Figure 5 for Figure 3 A partial enlarged view of the cutting knife at position B in the middle when it is in the first state;

[0021] Figure 6 A schematic structural diagram of a device for cutting a curved screen protective film provided by an embodiment of the present invention when a cutting knife is in a second position;

[0022] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0023] Figure 8 A top view of a cutting knife in a curved screen protective film cutting device provided by an embodiment of the present invention, in a second position;

[0024] Fig. 9 for Figure 8 Cross-sectional view in the middle DD direction;

[0025] Fig.10 for Fig. 9 The partial enlarged view of the compensation unit at E in the middle is the adjustment rod and the friction block;

[0026] Fig.11 for Fig. 9 A partial enlarged view of the compensation unit at E in the middle, which is a damping baffle, a blocking rod and a blocking plate.

[0027] In the figure: 110, bracket; 120, unwinding roller; 130, clamping roller; 140, knife holder; 150, cutting knife; 160, original film; 210, positioning rod; 220, first regulating rod; 230, second regulating rod; 240, compensation sleeve; 250, adjusting rod; 260, friction block; 310, damping baffle; 320, blocking rod; 330, blocking plate; 410, second regulating cylinder; 420, compensation rod; 430, first regulating cylinder. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] like Figures 1 to 11 As shown, an embodiment of the present invention provides a curved screen protective film cutting device, which includes a bracket 110, a knife holder 140 and a regulating component.

[0032] The support 110 can be placed on the ground. The support 110 is provided with a retractor, which is used to reel in or unreel the original film 160. When the retractor reels in or unreels the original film 160, the original film 160 moves along the first direction on the support 110. Specifically, the retractor includes a reeling roller and an unreeling roller 120, both of which are rotatably connected to the support 110, and the unreeling roller 120 is wound with the original film 160. The reeling roller and the unreeling roller 120 are arranged at intervals. The support 110 is provided with a first motor and a second motor, the first motor is used to drive the reeling roller to rotate, and the second motor is used to drive the unreeling roller 120 to rotate. When the first motor is started, the second motor is in a stopped state. Conversely, when the second motor is started, the first motor is in a stopped state. When the winding roller rotates, the original film 160 is gradually wound onto the winding roller, and the original film 160 is passively separated from the unwinding roller 120; when the unwinding roller 120 rotates, the original film 160 is gradually wound around the winding roller, and the original film 160 is passively separated from the winding roller. Further, under the action of the winding roller and the unwinding roller 120, there is a flat area of ​​the original film 160 on the bracket 110. When the winding roller and the unwinding roller 120 are winding or unwinding the original film 160, the original film 160 moves relative to the bracket 110, and the moving direction of the original film 160 on the bracket 110 is the first direction, then the axis extension direction of the winding roller and the unwinding roller 120 is perpendicular to the first direction, and the extension direction of the winding roller and the unwinding roller 120 is defined as the second direction.

[0033] Furthermore, a plurality of groups of clamping rollers 130 are arranged on the bracket 110, each of the clamping rollers 130 includes an upper roller and a lower roller, both of which are rotatably connected to the bracket 110, the upper roller and the lower roller are arranged at intervals, the original film 160 is arranged in the gap between the upper roller and the lower roller, the gap between the upper roller and the lower roller is equal to the thickness of the original film 160, and an auxiliary motor is arranged on the bracket 110, the auxiliary motor is used to drive the upper roller and the lower roller to rotate simultaneously, and the rotation directions of the upper roller and the lower roller are opposite; the plurality of groups of clamping rollers 130 are distributed at intervals along the first direction.

[0034] There are multiple knife racks 140, and the multiple knife racks 140 are all arranged on the bracket 110. The multiple knife racks 140 are evenly spaced on the bracket 110, and the multiple knife racks 140 are evenly arranged along the second direction. Each knife rack 140 is provided with a cutting knife 150, and each cutting knife 150 can contact the original film 160 in the flat area. When the cutting knife 150 and the original film 160 are in relative motion, the cutting knife 150 can make a cut on the surface of the original film 160. The cutting knife 150 has a first position parallel to the first direction and a second position perpendicular to the first direction. Specifically, when the multiple cutting knives 150 are in the first position, when the original film 160 moves along the first direction on the bracket 110, the multiple cutting knives 150 can cut the original film 160 in the first direction. At this time, the spacing between two adjacent cutting knives 150 is the same, so as to avoid waste of the original film 160 in the second direction. When the plurality of cutting knives 150 are in the second position, the original film 160 remains stationary on the bracket 110, and the plurality of cutting knives 150 jointly cut the original film 160 in the second direction to improve the flatness of the protective film cut from the original film 160 in the second direction.

[0035] The regulating component is used to switch the cutting blade 150 between the first position and the second position. Specifically, in the initial state, the multiple cutting blades 150 are all in the first position. When the multiple cutting blades 150 cut the original film 160 in the first direction, the original film 160 moves along the first direction; when the multiple cutting blades 150 cut the original film 160 in the second direction, the winding roller and the unwinding roller 120 adjust the original film 160 to the initial state, and the regulating component switches the multiple cutting blades 150 from the first position to the second position, ensuring that the multiple cutting blades 150 can smoothly cut the original film 160 in the second direction. When the cutting blades 150 are in the first position, if the edge of the required protective film in the first direction is a straight line, the regulating component can stabilize the multiple cutting blades 150 in the first position. If the required protective film has a wavy edge in the first direction, at this time, the regulating component regulates the multiple cutting knives 150 to a first state of reciprocating swing. When the cutting knife 150 swings back and forth, there is an angle between the extension direction of the cutting knife 150 and the first direction. When the cutting knife 150 swings to the extreme position, the angle between the extension direction of the cutting knife 150 and the first direction is a preset angle. According to the degree of wavyness of the required protective film at the edge in the first direction, the regulating component can adjust the size of the preset angle to ensure that the protective film cut by the multiple cutting knives 150 can meet the requirements.

[0036] The invention discloses a device for cutting a curved screen protective film. When cutting the curved screen protective film, a retractor flattens an original film 160 on a bracket 110, and the retractor can drive the original film 160 to move along a first direction on the bracket 110. A plurality of knife racks 140 are arranged on the bracket 110, and a cutting knife 150 is installed on the knife rack 140. In an initial state, the plurality of cutting knives 150 are set to be in a first position. If the edge of the required protective film in the first direction is a straight line, the regulating component can stabilize the plurality of cutting knives 150 in the first position. As the original film 160 moves on the bracket 110, the plurality of cutting knives 150 simultaneously cut the original film 160 in the first direction. If the edge of the required protective film in the first direction is a wavy shape, the regulating component adjusts the plurality of cutting knives 150 to The first state of reciprocating swing, and the cutting knife 150 in the first state has a preset angle with the first direction. As the original film 160 moves on the bracket 110, multiple cutting knives 150 simultaneously cut the original film 160 in the first direction; after cutting a batch of original films 160 in the first direction, the original film 160 is adjusted to the initial state using the retractor, and the regulating component switches the multiple cutting knives 150 to the second position, and the multiple cutting knives 150 in the second position cut the original film 160 again; by regulating the cutting knife 150 when cutting the original film 160 in the first direction, it is ensured that when the edge of the protective film in the first direction is wavy, the waste of the original film 160 is reduced, and at the same time, the multiple cutting knives 150 can improve the efficiency of cutting the original film 160.

[0037] In one embodiment, a positioning rod 210 is provided on the bracket 110, and the extension direction of the positioning rod 210 is perpendicular to the first direction. Specifically, the positioning rod 210 is parallel to the winding roller or the unwinding roller 120, and the extension direction of the axis of the positioning rod 210 is the second direction. The positioning rod 210 is arranged in parallel above the original film 160. Specifically, the positioning rod 210 is arranged just above the flattened area of ​​the original film 160, and a plurality of knife holders 140 are mounted on the positioning rod 210. The extension direction of the knife holder 140 is the same as the extension direction of the cutting knife 150. The cutting knife 150 is rotatably connected to one end of the knife holder 140, and the other end of the knife holder 140 is rotatably connected to the positioning rod 210. In the initial state, the extension direction of the knife holder 140 is perpendicular to the extension direction of the axis of the positioning rod 210. In other words, the extension direction of the knife holder 140 is parallel to the first direction. The regulating component can regulate the extension direction of the tool holder 140 to be parallel to the positioning rod 210 , and can also regulate the extension direction of the tool holder 140 to be perpendicular to the positioning rod 210 . Specifically, the regulating component is used to regulate the rotation of the tool holder 140 on the positioning rod 210 .

[0038] In one embodiment, the regulating assembly includes a first regulating rod 220, a second regulating rod 230 and a first regulating source, wherein the first regulating rod 220 is arranged parallel to the positioning rod 210, the first regulating rod 220 and the positioning rod 210 are coplanar, the first regulating rod 220 and the positioning rod 210 are arranged at intervals, the first regulating rod 220 is slidably connected to the bracket 110, and the distance between the first regulating rod 220 and the positioning rod 210 can be changed. One end of the second regulating rod 230 is fixedly connected to the tool holder 140, and the other end of the second regulating rod 230 is rotatably connected to the first regulating rod 220. Specifically, the second regulating rod 230 and the tool holder 140 are always arranged vertically, and the first regulating source is used to adjust the positioning rod 210 to reciprocate in the direction of its own axis. Specifically, when the cutting knife 150 is in the first position and the edge of the required protective film in the first direction is wavy, at this time, the first regulating source adjusts the positioning rod 210 to reciprocate in the direction of its own axis. When the positioning rod 210 moves back and forth along the direction of its own axis, with the cooperation of the first regulating rod 220, the second regulating rod 230 and the positioning rod 210, the knife holder 140 is in a reciprocating swinging state, so that the cutting knife 150 is in the first state, and the first regulating rod 220 swings back and forth under the joint action of the knife holder 140 and the second regulating rod 230. As the original film 160 moves in the first direction, multiple cutting knives 150 cut the original film 160 into a wavy shape in the first direction.

[0039] In one embodiment, the regulating component further includes a second regulating source, and the second regulating source is used to adjust the movement of the first regulating rod 220 along its own axial direction. Specifically, when the cutting knife 150 is switched from the first position to the second position, the first regulating source is in a shutdown state, and the second regulating source is started, and the second regulating source adjusts the position of the first regulating rod 220. When the first regulating rod 220 moves in the axial direction, the second regulating rod 230 and the knife holder 140 are linked to each other, so that the cutting knife 150 is switched from the first position to the second position. When the second direction of the original film 160 is cut, the first regulating rod 220 and the positioning rod 210 move synchronously along the second direction, and the first regulating rod 220 and the positioning rod 210 drive the knife holder 140 and the cutting knife 150 to stably cut the second direction of the original film 160.

[0040] In one embodiment, the control component further includes a compensation unit, which is used to compensate for the size of the preset angle between the knife holder 140 and the first direction when the positioning rod 210 moves along its own axis. Specifically, when the cutting knife 150 is in the first state, the positioning rod 210 moves along its own axis to cause the knife holder 140 to swing. If the first control rod 220 is in a stationary state in its own axis, the swing amplitude of the knife holder 140 is constant during the movement of the positioning rod 210 along its own axis. If the edge of the protective film in the first direction is required to be wavy, and the degree of wave at the edge of the first direction of different types of protective films is different, the size of the preset angle between the knife holder 140 and the first direction is compensated by the compensation unit, thereby changing the swing amplitude of the cutting knife 150 when cutting the protective film in the first direction.

[0041] In one embodiment, the compensation unit includes a compensation sleeve 240, the compensation sleeve 240 is coaxially arranged with the first regulating rod 220, the compensation sleeve 240 is slidably connected with the bracket 110 along the first direction, and there is resistance when the compensation sleeve 240 and the first regulating rod 220 move relative to each other. Specifically, when the positioning rod 210 slides along its own axis direction, the first regulating rod 220 slides on the bracket 110 along the first direction, and at this time, the compensation sleeve 240 and the first regulating rod 220 move synchronously in the first direction. The compensation sleeve 240 is coaxially arranged with the first regulating rod 220, and the compensation sleeve 240 is coaxially slidably connected with the first regulating rod 220. When the compensation sleeve 240 and the first regulating rod 220 move relative to each other, there is resistance. Under the action of the resistance, in the initial stage of the movement of the positioning rod 210 along its own axis, under the action of the resistance between the compensation sleeve 240 and the first regulating rod 220, the first regulating rod 220 is in a stationary state. After the positioning rod 210 moves a certain distance along its own axis, the movement of the positioning rod 210 is transmitted through the tool holder 140 and the second regulating rod 230. , so that the first regulating rod 220 overcomes the resistance between it and the compensation sleeve 240, and realizes the synchronous movement of the first regulating rod 220 and the compensation sleeve 240. After the first regulating rod 220 and the positioning rod 210 move synchronously, the angle between the cutting knife 150 and the first direction no longer changes. Compared with the static state of the first regulating rod 220, by setting the resistance to relative movement between the compensation sleeve 240 and the first regulating rod 220, the preset angle between the cutting knife 150 and the first direction is reduced, thereby adjusting the wave degree of different types of protective films at the edge in the first direction.

[0042] In one embodiment, the compensation unit further includes an adjustment rod 250 and a friction block 260. The friction block 260 is disposed inside the compensation sleeve 240. The friction block 260 can contact the first control rod 220 inside the compensation sleeve 240. The friction block 260 has friction resistance when the friction block 260 and the first control rod 220 move relative to each other. The adjustment rod 250 penetrates the side wall of the compensation sleeve 240 along the radial direction of the compensation sleeve 240. The adjustment rod 250 and the compensation sleeve 240 are connected by threads. The adjustment rod 250 and the friction block 260 are fixedly connected. The friction block 260 and the first control rod 220 are always in contact. When the adjustment rod 250 slides along the radial direction of the compensation sleeve 240, the positive pressure of the friction block 260 and the first control rod 220 will change, thereby changing the friction resistance between the friction block 260 and the first control rod 220, and further changing the preset angle between the cutting knife 150 and the first direction.

[0043] In other embodiments, the compensation unit also includes a damping baffle 310, a sealing rod 320 and a sealing plate 330. The damping baffle 310 is coaxially fixedly arranged inside the compensation sleeve 240, and the sealing plate 330 is coaxially sliding and sealingly arranged inside the compensation sleeve 240. One end of the first regulating rod 220 is inserted into the compensation sleeve 240. The end face of the first regulating rod 220, the sealing plate 330 and the inner wall of the compensation sleeve 240 can form a damping chamber, and the damping chamber is provided with damping fluid. The damping baffle 310 is arranged between the end face of the first regulating rod 220 and the sealing plate 330, and a damping hole is arranged on the damping baffle 310. When the first regulating rod 220 moves relative to the compensation sleeve 240, the damping fluid flows in the damping hole. The damping fluid has a certain resistance when flowing in the damping hole, thereby providing resistance for the relative movement between the compensation sleeve 240 and the first regulating rod 220. The blocking rod 320 penetrates the side wall of the compensation sleeve 240 and the damping baffle 310 along the radial direction of the compensation sleeve 240. The blocking rod 320 and the compensation sleeve 240 are connected by threads. The blocking rod 320 can change the size of the damping hole. Specifically, a plug-in groove is provided on the blocking plate 330. The plug-in groove is arranged along the radial direction of the blocking plate 330. The plug-in groove is connected to the damping hole. One end of the blocking rod 320 is arranged in the plug-in groove. When the blocking rod 320 rotates on the compensation sleeve 240, the blocking rod 320 can change the size of the damping hole, thereby changing the damping fluid to have a certain resistance when flowing in the damping hole, thereby changing the difficulty of relative movement between the first regulating rod 220 and the compensation sleeve 240.

[0044] In one embodiment, the second control source includes a second control cylinder 410 and a compensation rod 420. The second control cylinder 410 is slidably connected to the bracket 110 in a first direction. One end of the compensation rod 420 is fixedly connected to the power output end of the second control cylinder 410. The compensation rod 420 can be telescopically arranged. A compensation spring is arranged inside the compensation rod 420. The other end of the compensation rod 420 is arranged inside the compensation sleeve 240. Specifically, when the length of the second control cylinder 410 changes, the second control cylinder 410 gradually drives the compensation rod 420 to move toward the inside of the compensation sleeve 240, and makes the compensation rod 420 gradually contact the end of the first control rod 220. As the length of the second control cylinder 410 further changes, the length of the compensation rod 420 changes. At the same time, the first control rod 220 moves along its own axial direction, thereby realizing the switching of the cutting knife 150 from the first position to the second position.

[0045] Furthermore, two second regulating sources are provided, and the two regulating sources are respectively provided at two ends of the first regulating rod 220, so as to ensure that the first regulating rod 220 can be restored to an initial state after moving in its own axial direction.

[0046] In one embodiment, the first control source includes a first control cylinder 430, which is fixedly mounted on the bracket 110. The power output end of the first control cylinder 430 is fixedly connected to the positioning rod 210. The length change of the first control cylinder 430 can drive the positioning rod 210 to reciprocate in the direction of its own axis.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for cutting a curved screen protective film, characterized in that: include: A bracket, wherein a retractor is provided on the bracket, and the retractor is used to reel in or unreel the original film. When the retractor reels in or unreels the original film, the original film moves along a first direction on the bracket; A tool holder, wherein a plurality of tool holders are provided, and the plurality of tool holders are all provided on the bracket, and each tool holder is provided with a cutting knife, and the cutting knife has a first position parallel to the first direction and a second position perpendicular to the first direction; A regulating component, the regulating component is used to switch the cutting knife between a first position and a second position; When the cutting knife is in the first position, the regulating component can adjust the cutting knife to a first state of reciprocating swing, and the cutting knife in the first state has a preset angle with the first direction; A positioning rod is provided on the bracket, the extension direction of the positioning rod is perpendicular to the first direction, and the positioning rod is arranged parallel to the top of the original film; the extension direction of the knife holder is the same as the extension direction of the cutting knife, and the knife holder is rotatably connected to the positioning rod; The regulating component can regulate the extension direction of the tool holder and the positioning rod to be parallel, and the regulating component can also regulate the extension direction of the tool holder and the positioning rod to be perpendicular; The regulating component includes a first regulating rod, a second regulating rod and a first regulating source. The first regulating rod is arranged parallel to the positioning rod, the first regulating rod and the positioning rod are coplanar, and the distance between the first regulating rod and the positioning rod can be changed; one end of the second regulating rod is fixedly connected to the tool holder, and the other end of the second regulating rod is rotatably connected to the first regulating rod; the first regulating source is used to adjust the positioning rod to reciprocate in the direction of its own axis.

2. The device for cutting a curved screen protective film according to claim 1, characterized in that: The regulating component also includes a second regulating source, which is used to adjust the first regulating rod to move along its own axis direction.

3. The device for cutting a curved screen protective film according to claim 1, characterized in that: The regulating component also includes a compensation unit, which is used to compensate for the size of a preset angle between the tool holder and the first direction when the positioning rod moves along its own axial direction.

4. The device for cutting a curved screen protective film according to claim 3, characterized in that: The compensation unit comprises a compensation sleeve, which is coaxially arranged with the first regulating rod. The compensation sleeve is slidably connected with the bracket along the first direction, and there is resistance when the compensation sleeve and the first regulating rod move relative to each other.

5. The device for cutting a curved screen protective film according to claim 4, characterized in that: The compensation unit also includes an adjusting rod and a friction block. The friction block is arranged inside the compensation sleeve. The adjusting rod penetrates the side wall of the compensation sleeve along the radial direction of the compensation sleeve. The adjusting rod and the compensation sleeve are connected by threads. The adjusting rod is fixedly connected to the friction block, and the friction block is always in contact with the first regulating rod.

6. The device for cutting a curved screen protective film according to claim 4, characterized in that: The compensation unit also includes a damping baffle, a sealing rod and a sealing plate. The damping baffle is coaxially fixedly arranged inside the compensation sleeve, and the sealing plate is coaxially sliding and sealingly arranged inside the compensation sleeve; a damping hole is arranged on the damping baffle; the first regulating rod is inserted into the compensation sleeve; the sealing rod penetrates the side wall of the compensation sleeve and the damping baffle along the radial direction of the compensation sleeve, and the sealing rod is connected to the compensation sleeve by a threaded connection, and the sealing rod can change the size of the damping hole.

7. The device for cutting a curved screen protective film according to claim 4, characterized in that: The second control source includes a second control cylinder and a compensation rod. The second control cylinder is slidably connected to the bracket in a first direction. One end of the compensation rod is fixedly connected to the power output end of the second control cylinder. The compensation rod can be telescopically arranged. A compensation spring is arranged inside the compensation rod. The other end of the compensation rod is arranged inside the compensation sleeve.

8. The device for cutting a curved screen protective film according to claim 1, characterized in that: The first regulating source comprises a first regulating cylinder, the first regulating cylinder is fixedly arranged on the bracket, and the power output end of the first regulating cylinder is fixedly connected to the positioning rod.

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