Equal-depth four-curved screen bending device and method

Abstract

The present invention is applicable to the technical field of display screen production, and provides an equal-depth four-curved screen bending device and method. The equal-depth four-curved screen bending device includes a movable platform, a flipping mechanism, a bending jig, a visual inspection unit, a coaxial light source, and a side light source. Compared with the equal-depth four-curved screen bending device in the prior art, it can realize bending processing of various screens, such as flat screen bodies and screens with a certain curvature on the edges. In addition, during the bending processing of the second part, the flipping mechanism and the bending jig always avoid the first light path, the second light path, and the reflected light path during operation, so that the light emitted by the coaxial light source and / or the side light source will not be blocked and will not illuminate the detection area, so that the visual inspection unit can clearly obtain the image of the detection area after the second part is bent, so as to determine whether the bending of the second part is accurate, making it easier to take pictures when the screen is bent.

Description

Technical Field

[0001] The present invention belongs to the technical field of display screen production, and in particular relates to a device and method for bending a four-curved screen with equal depth. Background Art

[0002] A screen typically consists of multiple parts, the first of which can be the main body of the screen, and the second of which can be an FPC (Flexible Printed Circuit) connected to the main body. During the production process of mobile phone or other mobile device screens, the second part of the screen typically needs to be bent and attached to the inner side of the first part to facilitate installation of the entire screen. This bending process typically requires a four-curve bending device with equal depth to fold the screen so that the first and second parts fit together. However, existing four-curve bending devices often suffer from poor bending accuracy. Summary of the Invention

[0003] The purpose of the present invention is to provide an equal-depth four-curved screen bending device and method, aiming to solve the technical problem of poor bending accuracy in the existing equal-depth four-curved screen bending device affecting product quality.

[0004] The present invention is implemented as follows: in a first aspect, a bending device for an equal-depth four-curved screen is provided, which is used to bend a first part and a second part of a screen body, comprising a movable carrier, a flipping mechanism, a bending jig, a visual inspection unit, a coaxial light source, and a side light source. The movable carrier has a working surface for placing and fixing the first part, the bending jig is used to abut against the second part, the flipping mechanism is used to drive the bending jig to flip, so as to bend the second part to fit the first part through the bending jig, the side light source is used to emit light to the first part to increase its brightness, and the coaxial light source is used to emit light to the first part to increase its brightness. The visual inspection unit is used to obtain image information of a specified area;

[0005] The second part has a detection area, and a positioning mark for judging the position of the second part after bending is set in the detection area. When the second part is bent to be in contact with the first part, a first light path is formed between the side light source and the detection area, a second light path is formed between the coaxial light source and the detection area, and a reflected light path is formed between the visual detection unit and the detection area. The first light path and the reflected light path are set at an angle, and the second light path and the reflected light path are parallel to each other. The flipping mechanism avoids the first light path, the second light path and the reflected light path, and the bending jig avoids the first light path, the second light path and the reflected light path.

[0006] In an optional embodiment, the bending jig is staggered with the reflected light path and the second light path along a first direction, the first direction is a direction perpendicular to the reflected light path, and the bending jig has a first avoidance structure for avoiding the first light path, and the first light path avoids the bending jig through the first avoidance structure.

[0007] In an optional embodiment, a first connecting arm is provided in a ring connection between the bending jig and the flipping mechanism for connecting the two. The flipping mechanism is spaced apart from the bending jig through the first connecting arm to avoid the first optical path, the second optical path and the reflected optical path, and when the second part is bent to a state of being in contact with the first part, the first connecting arm also avoids the first optical path, the second optical path and the reflected optical path.

[0008] In an optional embodiment, a first driving group is provided between the first connecting arm and the driving end of the flipping mechanism, and the first driving group is used to drive the first connecting arm to move in a direction perpendicular to the working surface when the second part is in contact with the first part.

[0009] In an optional embodiment, the equal-depth four-curved screen bending device also includes a shaping block, which is movably connected to the flipping mechanism. A second driving group is also provided between the shaping block and the flipping mechanism. When the second part is bent to a state of being in contact with the first part, the shaping block avoids the first light path and the reflected light path, and the second driving group drives the shaping block to move in a direction perpendicular to the working surface to shape the second part.

[0010] In an optional embodiment, the bending jig has a pressing surface for abutting the second part, and the bending jig has an initial state and a pressing state. When the bending jig is in the pressing state, the bending jig bends the second part to fit with the first part, and the pressing surface and the working surface are parallel to each other. When the bending jig is in the initial state, the pressing surface and the working surface are set at an angle.

[0011] In an optional embodiment, the equal-depth four-curve screen bending device also includes an auxiliary flattening mechanism, which is used to press the second part tightly against the pressing surface when the bending jig is in the initial state. The auxiliary flattening mechanism includes an auxiliary pressure bracket, a driving structure and a pressing piece. The pressing piece is movably arranged on the auxiliary pressure bracket, the driving structure is arranged between the auxiliary pressure bracket and the pressing piece, and the driving structure is used to drive the pressing piece to move.

[0012] In an optional embodiment, the equal-depth four-curved screen bending device also includes a video recording unit, a mounting bracket and an adjustment structure. The video recording unit is arranged on the mounting bracket, and the video recording unit is used to record the bending process of the second part. The adjustment structure is arranged between the video recording unit and the mounting bracket, and is used to adjust the angle of the video recording unit.

[0013] In an optional embodiment, the flipping mechanism includes a flipping bracket, a rotating swing arm, a transverse swing arm and a power unit, the first end of the rotating swing arm is rotatably set on the flipping bracket, the driving end of the power unit is connected to the first end of the rotating swing arm, the power unit is used to drive the rotating swing arm to swing around a first axis, and the transverse swing arm is fixed to the second end of the rotating swing arm, and the transverse swing arm is set in a direction parallel to the first axis, and the end of the transverse swing arm away from the rotating swing arm is the driving end of the flipping mechanism.

[0014] In a second aspect, a method for bending a quadrilateral with equal depth is provided, using any of the above-mentioned quadrilateral bending devices with equal depth, comprising the following steps:

[0015] Visual pre-correction: placing the first part of the screen on the movable platform, fixing the position of the first part, and obtaining the position of the first part on the movable platform through the visual detection unit;

[0016] The screen position is corrected once, and the position of the first part is compared with the preset position. If the actual position of the first part does not match the preset position, the horizontal position of the movable stage is adjusted until the first part is adjusted to the preset position. If the actual position of the first part matches the preset position, the movable stage is not adjusted;

[0017] Transferring the second part, pressing the second part against the surface of the bending jig through the auxiliary flattening mechanism, and the auxiliary flattening mechanism assisting the bending jig in creating a vacuum to absorb the second part;

[0018] The jig is flipped, and the bending jig is flipped at a preset angle under the action of the flipping mechanism, and the second part is bent from the initial state to a state parallel to the first part by the bending jig;

[0019] Alignment detection: the visual inspection unit obtains images of the first and second parts after bending;

[0020] Secondary correction of the screen position: compare the alignment mark on the first part with the alignment mark on the second part. If the position between the two alignment marks meets the preset conditions, the mobile stage will not move. If the two alignment marks do not meet the preset conditions, the position of the mobile stage will be adjusted to adjust the position of the first part.

[0021] The screen body is pre-pressed. After the relative positions of the alignment marks on the first part and the alignment marks on the second part meet the preset conditions, the first drive group drives the bending jig to press the second part. At the same time, the shaping block is also driven by the second drive group to press the second part to shape the crease.

[0022] Reset, the bending jig returns to its initial position under the action of the flipping mechanism. The technical effect of the present invention relative to the prior art is: when working, the first part can be fixed on the working surface of the movable carrier, and the bending jig is used to abut against the second part, and then the flipping mechanism is used to drive the bending jig to flip, so as to bend the second part to fit with the first part through the bending jig. At the same time, a side light source is provided on the basis of the coaxial light source. When the second part is bent to fit with the first part, a first light path is formed between the side light source and the detection area, a second light path is formed between the coaxial light source and the detection area, and a reflected light path is formed between the visual detection unit and the detection area. The first light path and the reflected light path are set at an angle, and the second light path and the reflected light path are parallel to each other. When processing a first portion with a certain curvature at the edge (e.g., a four-curved screen with equal depth), after the second portion is bent into place, a side light source can be used to emit light toward the bent second portion. The light then reflects off the curved portion of the first portion and enters the visual inspection unit. When processing a first portion with a planar structure, after the second portion is bent into place, a side light source can be used to emit light toward the bent second portion. The light then reflects off the first portion and enters the visual inspection unit. Furthermore, the flipping mechanism and bending jig always avoid the first light path, the second light path, and the reflected light path during operation. Compared with the equal-depth four-curved screen bending device in the prior art, it can realize the bending processing of various screens such as flat screens and screens with certain curved edges. In the bending processing process of the second part, the flipping mechanism and the bending jig always avoid the first light path, the second light path and the reflected light path during operation, so that the light emitted by the coaxial light source and / or the side light source will not be blocked and will not be illuminated to the detection area, so that the visual detection unit can clearly obtain the image of the detection area after the second part is bent, so as to judge whether the bending of the second part is accurate, making it easier to take images of the screen during bending processing, thereby improving the utilization rate of the equipment and the quality of the product.

[0023] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. 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 any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the equal-depth four-curved screen bending device in a compressed state provided by an embodiment of the present invention. Figure 1 ;

[0026] Figure 2 yes Figure 1 Schematic diagram of the side structure along direction A;

[0027] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of the equal-depth four-curved screen bending device in a compressed state provided by an embodiment of the present invention. Figure 2 ;

[0029] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0030] Figure 6 This is a schematic structural diagram of an equal-depth four-curved screen bending device in an initial state provided by an embodiment of the present invention;

[0031] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at D in the middle;

[0032] Figure 8 Schematic diagram of the structure of the turning mechanism and the moving platform used in the embodiment of the present invention;

[0033] Figure 9 is a schematic structural diagram of an equal-depth four-curved screen bending device provided by another embodiment of the present invention;

[0034] Figure 10 1 is a schematic structural diagram of an equal-depth four-curved screen bending device provided by another embodiment of the present invention;

[0035] Figure 11 It is a flow chart of the equal-depth four-curved screen bending method provided by an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Moving platform; 2. Bending jig; 21. First avoidance structure; 211. Inclined surface structure; 22. Pressing surface; 23. Vacuum adsorption unit; 3. Flipping mechanism; 31. Flipping bracket; 32. Rotating swing arm; 33. Horizontal swing arm; 34. Power unit; 35. First connecting arm; 36. Second connecting arm; 37. First drive group; 38. Second drive group; 4. Visual inspection unit; 5. Coaxial light source; 6. Side light source; 7. Auxiliary flattening mechanism; 71. Auxiliary pressure bracket; 72. Pressing piece; 73. Auxiliary pressure driving structure; 731. Horizontal driving assembly; 732. Vertical driving assembly; 733. Driving bracket; 8. Shaping block; 9. Video recording unit; 10. Mounting bracket; 11. Adjustment structure; 12. Second part; 13. First part; 14. First optical path; 15. Reflection optical path. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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 limiting the present invention.

[0040] In this embodiment, according to Figure 1 The XYZ rectangular coordinate system established in the definition is: the side located in the positive direction of the X axis is defined as the front, and the side located in the negative direction of the X axis is defined as the back; the side located in the positive direction of the Y axis is defined as the left, and the side located in the negative direction of the Y axis is defined as the right; the side located in the positive direction of the Z axis is defined as the top, and the side located in the negative direction of the Z axis is defined as the bottom.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0044] Please refer to Figures 1 to 7 As shown, in an embodiment of the present invention, an equal-depth four-curved screen bending device is provided, including a movable platform 1, a flipping mechanism 3, a bending jig 2, a visual inspection unit 4, a coaxial light source 5 and a side light source 6. The movable platform 1 has a working surface for placing and fixing the first part 13, the bending jig 2 is used to abut against the second part 12, the flipping mechanism 3 is used to drive the bending jig 2 to flip, so as to bend the second part 12 to fit with the first part 13 through the bending jig 2, the side light source 6 is used to emit light to the first part 13 to increase its brightness, and the coaxial light source 5 is used to emit light to the first part 13 to increase its brightness, and the visual inspection unit 4 is used to obtain image information of the detection area.

[0045] The second part 12 has a detection area, and an alignment mark is provided in the detection area for judging the position of the second part 12 after bending. When the second part 12 is bent to be in contact with the first part 13, a first light path is formed between the side light source 6 and the detection area, a second light path is formed between the coaxial light source 5 and the detection area, and a reflected light path is formed between the visual detection unit 4 and the detection area. The first light path and the reflected light path are set at an angle, and the second light path and the reflected light path are parallel to each other. The flipping mechanism 3 avoids the first light path, the second light path and the reflected light path, and the bending jig 2 avoids the first light path, the second light path and the reflected light path.

[0046] Specifically, the movable platform 1 refers to a supporting component with a certain height. The shape of the movable platform 1 can be a block, a plate, or a combination of multiple shapes. The movable platform 1 has the freedom to move in the horizontal direction. The movable platform 1 can be slidably set on a slide rail structure. The movable platform 1 can also be provided with a translation drive mechanism. The translation drive mechanism can make the movable platform 1 slide along the slide rail structure to adjust the position of the movable platform 1 in the horizontal direction. The working surface can be a planar structure provided on the top surface of the movable platform 1. A fixing structure for fixing the first part 13 can also be provided on the working surface. The fixing structure can achieve the fixing of the first part 13 by pressing, vacuum adsorption, or gluing. The bending jig 2 refers to a block-shaped component with a certain volume. The shape of the bending jig 2 can match the shape of the second part 12, or the bending jig 2 has a contact surface that matches the shape of the second part 12. The bending jig 2 can also be provided with an adsorption structure for fixing the second part 12 and the bending jig 2 to each other. The adsorption structure can fix the second part 12 by pressing, vacuum adsorption or bonding.

[0047] The flipping mechanism 3 refers to a component that drives the bending jig 2 to flip. The flipping mechanism 3 can drive the bending jig 2 by rotating, sliding or swinging. The visual detection unit 4 refers to a component or assembly that can obtain an image in a specified area. The visual detection unit 4 can send the obtained image to the control unit and analyze it using image processing software. The visual detection unit 4 can be a CCD (Charge-coupled Device) visual detection device. The coaxial light source 5 and the side light source 6 both refer to components that can emit light to a specified area. By emitting light to a specified area (such as a detection area), and the light entering the visual detection unit 4 after reflection, the image obtained by the visual detection unit 4 is made clearer, which facilitates the visual detection unit 4 to detect whether the position of the alignment mark is accurate. The side light source 6 can be a large surface light source composed of multiple light sources arranged in an array. The pressed state refers to the position when the flipping mechanism 3 drives the bending jig 2 to flip and bends the second part 12 to fit with the first part 13. The initial state refers to the position when the bending jig 2 just contacts the second part 12.

[0048] The detection area refers to a region of a certain area on the second portion 12, wherein the detection area can change as the second portion 12 bends. An alignment mark is provided in the detection area, and an alignment mark may also be provided on the first portion 13. After the second portion 12 is bent and attached to the first portion 13, the alignment mark in the detection area can be identified by the visual inspection unit 4 to determine whether the alignment mark on the first portion 13 is aligned, thereby determining whether the bending position of the second portion 12 is correct. In addition, the first optical path, the second optical path, and the reflected optical path all refer to the path area through which the light passes, which is generally a cylindrical region with a certain cross-sectional area.

[0049] The equal-depth four-curved screen bending device provided in an embodiment of the present invention can fix the first part 13 on the working surface of the movable platform 1 when in operation, and use the bending jig 2 to abut the second part 12, and then use the flipping mechanism 3 to drive the bending jig 2 to flip, so as to bend the second part 12 to fit with the first part 13 through the bending jig 2. At the same time, a side light source 6 is provided on the basis of the coaxial light source 5. When the second part 12 is bent to fit with the first part 13, a first light path is formed between the side light source 6 and the detection area, a second light path is formed between the coaxial light source 5 and the detection area, and a reflected light path is formed between the visual detection unit 4 and the detection area. The first light path and the reflected light path are arranged at an angle, and the second light path and the reflected light path are parallel to each other. When processing a screen with a certain curvature at the edge (e.g., a four-curved screen with equal depth), after the second portion 12 is bent into place, light can be emitted from the side light source 6 toward the bent second portion 12. The light then reflects off the curved portion of the first portion 13 and enters the visual inspection unit 4. When processing a screen with a planar structure, after the second portion 12 is bent into place, light can be emitted from the side light source 6 toward the bent second portion 12. The light then reflects off the first portion 13 and enters the visual inspection unit 4. Furthermore, during operation, the flipping mechanism 3 and the bending jig 2 always avoid the first light path, the second light path, and the reflected light path. Compared with the equal-depth four-curved screen bending device in the prior art, it can realize the bending processing of flat screens and screens with certain curved edges, and during the bending processing of the second part 12, the flipping mechanism 3 and the bending jig 2 always avoid the first light path, the second light path and the reflected light path during operation, so that the light emitted by the coaxial light source 5 and / or the side light source 6 will not be blocked and will not be illuminated to the detection area, so that the visual inspection unit 4 can clearly obtain the image of the detection area after the second part 12 is bent, so as to determine whether the bending of the second part 12 is accurate, making the imaging of the second part 12 when it is bent simpler and more convenient, thereby improving the utilization rate of the equipment and the quality of the product.

[0050] It should be noted that the visual detection unit 4, coaxial light source 5 and side light source 6 can all be fixed on the fixed frame, and the position and shooting angle of the visual detection unit 4 can be adjusted, and the position and illumination angle of the coaxial light source 5 and side light source 6 can also be adjusted according to production needs.

[0051] In one embodiment, see Figure 2 and Figure 3 The bending jig 2 is staggered with the reflected light path and the second light path along the first direction, the first direction is a direction perpendicular to the reflected light path, and the bending jig 2 has a first avoidance structure 21 for avoiding the first light path, and the first light path avoids the bending jig 2 through the first avoidance structure 21. Specifically, the first avoidance structure 21 refers to a structure provided on the bending jig 2, and the first avoidance structure 21 can be a groove structure, a slope structure 211 or an open hole structure, etc. The bending jig 2 avoids the reflected light path and the second light path by staggering along the first direction, so that when the bending jig 2 bends the second part 12 and fits it to the first part 13, the light emitted by the coaxial light source 5 can be irradiated to the detection area through the second light path without obstruction, and after being reflected by the first part 13, it is captured by the visual detection unit 4 through the reflected light path. Furthermore, the bending jig 2 includes a first avoidance structure 21 for avoiding the first optical path. This prevents the bending jig 2 from blocking the light emitted by the side light source 6. This allows the bending jig 2 to fold the second portion 12 and attach it to the first portion 13. Light from the side light source 6 can then pass unobstructed through the first optical path to the inspection area. After being reflected by the first portion 13, it is captured by the visual inspection unit 4 via the reflected optical path. This simplifies the structure of the bending jig 2, which avoids the first, second, and reflected optical paths.

[0052] Based on the above-mentioned characteristic first avoidance structure 21, please refer to Figure 3 and Figure 5 The first avoidance structure 21 includes a bevel structure 211 provided on the bending jig 2, and the angle of the bevel structure 211 is adapted to the first optical path. Specifically, the bevel structure 211 refers to the bevel structure 211 formed after at least part of the object is removed. The bevel structure 211 is formed by removing the part of the bending jig 2 that blocks the first optical path. At the same time, the inclination angle of the bevel structure 211 is adapted to the irradiation angle of the first optical path, so that when the bending jig 2 bends the second part 12 and fits it to the first part 13, the light emitted by the side light source 6 can be irradiated to the detection area through the first optical path without obstruction, thereby making the overall structure of the bending jig 2 simpler on the basis of avoiding the first optical path.

[0053] In an alternative embodiment, see Figure 3 and Figure 5 The inclined surface structure 211 can be set on the end surface of the bending jig 2 close to the detection area. Part of the end surface of the bending jig 2 close to the detection area can be removed by machining or wire cutting to form the above-mentioned inclined surface structure 211, which makes processing more convenient.

[0054] In one embodiment, see Figure 8 A first connecting arm 35 is provided in a loop connecting the bending jig 2 and the flipping mechanism 3. The flipping mechanism 3 is spaced apart from the bending jig 2 via the first connecting arm 35 to avoid the first optical path, the second optical path, and the reflected optical path. When the second portion 12 is bent to abut against the first portion 13, the first connecting arm 35 also avoids the first optical path, the second optical path, and the reflected optical path. Specifically, the first connecting arm 35 is a member of a certain length. The first connecting arm 35 may be in the shape of a plate, a block, or a column, or may be a combination of multiple shapes. By providing a first connecting arm 35 between the bending jig 2 and the flipping mechanism 3, the driving end of the flipping mechanism 3 can be spaced apart from the bending jig 2 due to the length of the first connecting arm 35 itself, so that when the bending jig 2 bends the second part 12 and fits it to the first part 13, the flipping mechanism 3 and the driving end of the flipping mechanism 3 can be away from the bending jig 2, thereby achieving the purpose of the flipping mechanism 3 avoiding the first light path, the second light path and the reflected light path, making the installation of the bending jig 2 simpler and more convenient, and thus also making the connection between the bending jig 2 and the flipping mechanism 3 simpler.

[0055] In an alternative embodiment, see Figure 8 The first direction is perpendicular to both the first and second optical paths. The first connecting arm 35 has a relief portion for avoiding the first, second, and reflected optical paths. The relief portion can be located in the middle of the first connecting arm 35. The relief portion allows the first connecting arm 35 to conveniently avoid the first, second, and reflected optical paths. The relief portion has a thickness of 4 to 10 mm along the first direction. Preferably, the relief portion has a thickness of 6 mm along the first direction. By providing the relief portion with the aforementioned thickness, the strength of the first connecting arm 35 is ensured while also conveniently avoiding the first, second, and reflected optical paths.

[0056] In one embodiment, see Figure 8A first drive group 37 is provided between the first connecting arm 35 and the driving end of the flipping mechanism 3. The first drive group 37 is used to drive the first connecting arm 35 to move in a direction perpendicular to the working surface when the second part 12 is in contact with the first part 13. Specifically, the first drive group 37 refers to a component or assembly that can drive an object to move in a straight line. The first drive group 37 can be a cylinder, a hydraulic cylinder, or an electric push rod. The first drive group 37 can also be a screw slider structure or a crank crankshaft structure. By providing the first drive group 37 between the first connecting arm 35 and the driving end of the flipping mechanism 3, when the bending jig 2 drives the second part 12 to bend to a state in contact with the first part 13, the first drive group 37 can drive the first connecting arm 35 to move a certain distance in a direction perpendicular to the working surface, thereby avoiding a gap between the second part 12 and the first part 13, making the bending of the second part 12 more accurate, and improving the accuracy of the bending of the second part 12 and the quality of the product.

[0057] In an alternative embodiment, see Figure 8 The first driving group 37 is a driving cylinder, wherein the body of the driving cylinder is arranged on the driving end of the flip mechanism 3, and the first connecting arm 35 is connected to the driving end of the driving cylinder, making the installation of the driving cylinder more convenient and the overall structure of the equipment simpler.

[0058] In one embodiment, see Figure 5 The equal-depth four-curve screen bending device also includes a shaping block 8, which is movably connected to the flipping mechanism 3. A second drive group 38 is also provided between the shaping block 8 and the flipping mechanism 3. When the second part 12 is bent to a state in contact with the first part 13, the shaping block 8 avoids the first light path, the second light path and the reflected light path. The second drive group 38 drives the shaping block 8 to move in a direction perpendicular to the working surface to shape the second part 12. Specifically, the shaping block 8 refers to a component with a certain volume. The shaping block 8 can be in the shape of a plate, a block or a strip, etc. The second drive group 38 refers to a component or assembly that can drive an object to move in a straight line. The second drive group 38 can be a cylinder, a hydraulic cylinder or an electric push rod, etc. The second drive group 38 can also be a screw slider structure or a crank crankshaft structure, etc. The shaping block 8 is movably connected to the flip mechanism 3 via the second drive group 38. The shaping block 8 can avoid the first optical path, the second optical path, and the reflected optical path by being misaligned. Alternatively, the shaping block 8 can be provided with an avoidance structure, such as an avoidance groove, to avoid the avoidance. When the second portion 12 is bent to a state of contact with the first portion 13, the second drive group 38 drives the shaping block 8 to move in a direction perpendicular to the working surface to press the bending line of the second portion 12, thereby achieving the purpose of shaping the bend of the second portion 12, making the bend of the second portion 12 more precise and in place.

[0059] In an alternative embodiment, see Figure 8 A second connecting arm 36 is further provided between the shaping block 8 and the flipping mechanism 3. Specifically, the second connecting arm 36 is a component of a certain length and can be in the shape of a block, plate, or column. The second connecting arm 36 can be offset to avoid being in the first light path, the second light path, and the reflected light path. The second connecting arm 36 facilitates installation of the shaping block 8.

[0060] In one embodiment, see Figure 6 and Figure 7 The bending jig 2 has a pressing surface 22 for contacting the second part 12. The bending jig 2 has an initial state and a pressing state. When the bending jig 2 is in the pressing state, the bending jig 2 bends the second part 12 to fit with the first part 13, and the pressing surface 22 and the working surface are parallel to each other. When the bending jig 2 is in the initial state, the pressing surface 22 and the working surface are set at an angle. Specifically, the pressing surface 22 refers to a surface structure with a certain area. The pressing surface 22 can be a plane structure or a curved surface structure. The initial state and the pressing state refer to the two end point positions of the movement stroke of the bending jig 2. The bending jig 2 starts to contact the second part 12 in the initial position, and bends the second part 12 to fit with the first part 13 in the pressing state. By setting the pressing surface 22 and the working surface at an angle when the bending jig 2 is in the initial state, when processing a screen with a certain curvature at the edge (such as an equal-depth four-curved screen), it can be ensured that the pressing surface 22 can be in contact with the second part 12 in the initial state, making the bending of the second part 12 more convenient.

[0061] In an alternative embodiment, see Figure 6 and Figure 7 A vacuum adsorption unit 23 is also provided on the pressing surface 22 of the bending jig 2. The shape of the vacuum adsorption unit 23 matches the shape of the second part 12, and the vacuum adsorption unit 23 can be connected to the external vacuum generating unit pipeline. When the bending jig 2 approaches the second part 12, the second part 12 can be adsorbed on the pressing surface 22 by vacuum adsorption, making bending more convenient.

[0062] In one embodiment, see Figure 9The equal-depth four-curve bending device also includes an auxiliary flattening mechanism 7. The auxiliary flattening mechanism 7 is used to press the second part 12 tightly against the pressing surface 22 when the bending jig 2 is in the initial state. The auxiliary flattening mechanism 7 includes an auxiliary pressure bracket 71, an auxiliary pressure driving structure 73 and a pressing member 72. The pressing member 72 is movably arranged on the auxiliary pressure bracket 71. The auxiliary pressure driving structure 73 is arranged between the auxiliary pressure bracket 71 and the pressing member 72. The auxiliary pressure driving structure 73 is used to drive the pressing member 72 to move closer to or away from the bending jig 2. Specifically, the auxiliary flattening mechanism 7 refers to a component or assembly that can press an object. The auxiliary pressure bracket 71 refers to a supporting component with a certain height. The auxiliary pressure bracket 71 can be a block, a plate, or a combination of multiple shapes. The pressing member 72 refers to a component with a certain volume. The pressing member 72 has an auxiliary pressure surface parallel to the pressing surface 22. The pressing member 72 can be a block, a plate, etc. The auxiliary pressure driving structure 73 refers to a component that can drive the object to move. When the bending jig 2 is in the initial state, the auxiliary pressure driving structure 73 can drive the pressing member 72 to move toward the bending jig 2, so that the second part 12 can be pressed tightly against the pressing surface 22 through the pressing member 72, making the fitting of the second part 12 and the pressing surface 22 more convenient.

[0063] In one embodiment, see Figure 9 The auxiliary pressure drive structure 73 includes a transverse drive assembly 731, a drive bracket 733, and a vertical drive assembly 732. The main body of the transverse drive assembly 731 is disposed on the auxiliary pressure bracket 71, the drive bracket 733 is disposed at the drive end of the transverse drive assembly 731, and the main body of the vertical drive assembly 732 is disposed on the drive bracket 733. The pressing member 72 is connected to the drive end of the vertical drive assembly 732. The transverse drive assembly 731 is used to drive the drive bracket 733 and the vertical drive assembly 732 to move in the horizontal direction, and the vertical drive assembly 732 is used to drive the pressing member 72 to move in a direction perpendicular to the pressing surface 22. The cooperation between the transverse drive assembly 731 and the vertical drive assembly 732 can drive the pressing member 72 to move in the horizontal direction and in a direction perpendicular to the pressing surface 22, making it more convenient to drive the pressing member 72 to move.

[0064] In an alternative embodiment, see Figure 9 The pressing member 72 includes a pressing plate body arranged parallel to the pressing surface 22, wherein the side of the pressing plate body is the auxiliary pressing surface. Specifically, the pressing member 72 adopts a pressing plate body to make the overall structure of the auxiliary flattening mechanism 7 simpler and the pressing member 72 as a whole lighter.

[0065] In one embodiment, see Figure 10The equal-depth four-curved screen bending device also includes a video recording unit 9, a mounting bracket 10 and an adjustment structure 11. The video recording unit 9 is arranged on the mounting bracket 10. The video recording unit 9 is used to record the bending process of the second part 12. The adjustment structure 11 is arranged between the video recording unit 9 and the mounting bracket 10, and is used to adjust the angle of the video recording unit 9. Specifically, the video recording unit 9 refers to a component or assembly that can shoot video. The video recording unit 9 can be a camera, etc. The mounting bracket 10 refers to a supporting component with a certain height. The mounting bracket 10 can be cylindrical, plate-shaped or a combination of multiple shapes. The adjustment structure 11 refers to a structure that can connect two objects and allow the two objects to change their relative positions. Through the setting of the video recording unit 9, the bending process of the second part 12 can be recorded, so that the entire bending process can be monitored to ensure the accuracy and quality of the bending. At the same time, the video recording unit 9 is connected to the mounting bracket 10 through an adjustment structure 11. The shooting angle of the video recording unit 9 can be adjusted according to the position and shape of the product through the adjustment structure 11. For example, in the process of processing two different screens, ordinary screens and deep four-curved screens, the video recording unit 9 can shoot clearer and more conveniently.

[0066] In one embodiment, see Figure 10The flip mechanism 3 includes a flip bracket 31, a rotating swing arm 32, a transverse swing arm 33, and a power unit 34. The first end of the rotating swing arm 32 is rotatably mounted on the flip bracket 31. The driving end of the power unit 34 is connected to the first end of the rotating swing arm 32. The power unit 34 is used to drive the rotating swing arm 32 to swing about a first axis. The transverse swing arm 33 is fixed to the second end of the rotating swing arm 32 and is arranged parallel to the first axis. The end of the transverse swing arm 33 away from the rotating swing arm 32 serves as the driving end of the flip mechanism 3. Specifically, the flip bracket 31 is a supporting component with a certain height. The flip bracket 31 can be in the shape of a plate, a block, or a combination of multiple shapes. The rotating swing arm 32 and the transverse swing arm 33 are both components with a certain length. Both can be in the shape of a block, a plate, or a column. The power unit 34 is a component or assembly capable of outputting torque. The power unit 34 can be an electric motor, a hydraulic motor, or the like. By rotating the first end of the rotating swing arm 32 onto the flip bracket 31, and connecting the driving end of the power unit 34 to the first end of the rotating swing arm 32, the power unit 34 can drive the rotating swing arm 32 to swing around the first axis, and the transverse swing arm 33 is fixed to the second end of the rotating swing arm 32, and the transverse swing arm 33 is arranged in a direction parallel to the first axis. When the rotating swing arm 32 rotates, the transverse swing arm 33 will remain parallel to the first axis and rotate around the first axis. By installing the bending jig 2 on the transverse swing arm 33, the bending jig 2 can be flipped. The flip mechanism 3 adopts the above-mentioned structure. While driving the bending jig 2 to flip, it can also reduce the volume occupied by the flip mechanism 3 during movement. At the same time, it can also enable the flip mechanism 3 to avoid the first light path, the second light path and the reflected light path, thereby improving the bending accuracy of the second part 12.

[0067] Second, see Figure 11 , provides a method for bending four curved screens with equal depth, using any of the above-mentioned four curved screen bending devices with equal depth, comprising the following steps:

[0068] S1, visual pre-correction, placing the first part 13 of the screen on the movable platform 1, fixing the position of the first part 13, and obtaining the position of the first part 13 on the movable platform 1 through the visual detection unit 4;

[0069] Specifically, the movable platform 1 can be located at the installation position when the first part 13 is installed and fixed, and after the first part 13 is fixed, it drives the first part 13 to move to a position below the visual inspection unit 4.

[0070] S2. Correct the screen position once, comparing the position of the first portion 13 with the preset position. If the actual position of the first portion 13 does not match the preset position, adjust the horizontal position of the movable stage 1 until the first portion 13 is adjusted to the preset position. If the actual position of the first portion 13 does not match the preset position, the movable stage 1 is not adjusted.

[0071] Specifically, when the position of the movable platform 1 is adjusted, the first part 13 is also driven to move together.

[0072] S3, transfer the second part 12, and press the second part 12 against the surface of the bending jig 2 through the auxiliary flattening mechanism 7, which helps the bending jig 2 to create a vacuum to absorb the second part 12;

[0073] Specifically, the bending jig 2 can be initially at a position at an angle to the working surface on the movable platform 1. After the position adjustment of the movable platform 1 is completed, the bending jig 2 can be driven by the flipping mechanism 3 to flip to a position abutting the second part 12, and the second part 12 can be pressed against the surface of the bending jig 2 by the auxiliary flattening mechanism 7, and then the second part 12 can be adsorbed and fixed to the surface by the adsorption structure on the bending jig 2.

[0074] S4: The jig is flipped. The bending jig 2 is flipped by a preset angle under the action of the flipping mechanism 3. The second portion 12 is bent from the initial state to a state parallel to the first portion 13 by the bending jig 2.

[0075] Specifically, after the second portion 12 is adsorbed and fixed on the surface of the bending jig 2 , the bending jig 2 is driven to flip around the axis by the flipping mechanism 3 , and the second portion 12 can be bent during the flipping process of the bending jig 2 .

[0076] S5, alignment detection, the visual inspection unit 4 obtains images of the first portion 13 and the second portion 12 after bending;

[0077] Specifically, the light emitted by the side light source 6 or the coaxial light source 5 is irradiated on the first part 13 and reflected, and then received by the visual detection unit 4, so that the visual detection unit 4 obtains image information within the detection area. The detection area has a first alignment mark, and a second alignment mark is also provided on the first part 13.

[0078] S6. Secondary correction of the screen position: compare the alignment mark on the first portion 13 with the alignment mark on the second portion 12. If the position between the two alignment marks meets the preset conditions, the mobile stage 1 does not move. If the two alignment marks do not meet the preset conditions, the position of the mobile stage 1 is adjusted to adjust the position of the first portion 13.

[0079] S7: Pre-tighten the screen body. After the relative positions of the alignment marks on the first portion 13 and the alignment marks on the second portion 12 meet the preset conditions, the first drive group 37 drives the bending jig 2 to press the second portion 12. At the same time, the shaping block 8 is also driven by the second drive group 38 to press the second portion 12 to shape the crease.

[0080] S8, resetting, the bending jig 2 is restored to its initial position under the action of the turning mechanism 3.

[0081] Specifically, the bending jig 2 is restored to its initial position by the flipping mechanism 3 , and the movable platform 1 can also be moved to the position where the screen is installed, making the installation of the first part 13 of the screen more convenient.

[0082] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. The above is only a preferred embodiment of the present invention, which only specifically describes the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific embodiments of the present invention that can be associated with by those skilled in the art without creative work, should be included in the scope of protection of the present invention.

Claims

1. A device for bending a four-curved screen with equal depth, used to bend the second part of the screen body and attach it to the first part of the screen body, characterized in that: The device comprises a movable platform, a flipping mechanism, a bending jig, a visual inspection unit, a coaxial light source, and a side light source. The movable platform has a working surface for placing and fixing the first part of the screen body. The bending jig is used to abut against the second part of the screen body. The flipping mechanism is used to drive the bending jig to flip, so as to bend the second part of the screen body to fit the first part of the screen body through the bending jig. The side light source is used to emit light to the first part of the screen body to increase its brightness, and the coaxial light source is used to emit light to the first part of the screen body to increase its brightness. The visual inspection unit is used to obtain image information of a specified area. The second part of the screen body has a detection area, and an alignment mark is provided in the detection area for judging the position of the second part of the screen body after bending. When the second part of the screen body is bent to be in contact with the first part of the screen body, a first light path is formed between the side light source and the detection area, a second light path is formed between the coaxial light source and the detection area, and a reflected light path is formed between the visual detection unit and the detection area. The first light path and the reflected light path are arranged at an angle, and the second light path and the reflected light path are parallel to each other. The flipping mechanism avoids the first light path, the second light path and the reflected light path, and the bending jig avoids the first light path, the second light path and the reflected light path.

2. The equal-depth four-curved screen bending device according to claim 1, characterized in that: The bending jig is staggered with the reflected light path and the second light path along a first direction, the first direction being a direction perpendicular to the reflected light path, and the bending jig has a first avoidance structure for avoiding the first light path, and the first light path avoids the bending jig through the first avoidance structure.

3. The equal-depth four-curved screen bending device according to claim 2, characterized in that: A first connecting arm is provided in a ring connection between the bending jig and the flipping mechanism for connecting the two. The flipping mechanism is spaced apart from the bending jig through the first connecting arm to avoid the first optical path, the second optical path and the reflected optical path. When the second part of the screen body is bent to a state of being in contact with the first part of the screen body, the first connecting arm also avoids the first optical path, the second optical path and the reflected optical path.

4. The equal-depth four-curved screen bending device according to claim 3, characterized in that: A first driving group is provided between the first connecting arm and the driving end of the flipping mechanism, and the first driving group is used to drive the first connecting arm to move in a direction perpendicular to the working surface when the second part of the screen body is in contact with the first part of the screen body.

5. The equal-depth four-curved screen bending device according to claim 4, characterized in that: The equal-depth four-curved screen bending device also includes a shaping block, which is movably connected to the flipping mechanism. A second driving group is also provided between the shaping block and the flipping mechanism. When the second part of the screen body is bent to a state of being in contact with the first part of the screen body, the shaping block avoids the first light path and the reflected light path, and the second driving group drives the shaping block to move in a direction perpendicular to the working surface to shape the second part of the screen body.

6. The equal-depth four-curved screen bending device according to any one of claims 1 to 5, characterized in that: The bending jig has a pressing surface for abutting the second part of the screen body. The bending jig has an initial state and a pressing state. When the bending jig is in the pressing state, the bending jig bends the second part of the screen body to fit with the first part of the screen body, and the pressing surface and the working surface are parallel to each other. When the bending jig is in the initial state, the pressing surface and the working surface are set at an angle.

7. The equal-depth four-curved screen bending device according to claim 6, characterized in that: The equal-depth four-curved screen bending device also includes an auxiliary flattening mechanism, which is used to press the second part of the screen body tightly against the pressing surface when the bending jig is in the initial state. The auxiliary flattening mechanism includes an auxiliary pressure bracket, a driving structure and a pressing piece. The pressing piece is movably arranged on the auxiliary pressure bracket, and the driving structure is arranged between the auxiliary pressure bracket and the pressing piece. The driving structure is used to drive the pressing piece to move.

8. The equal-depth four-curved screen bending device according to any one of claims 1 to 5, characterized in that: The equal-depth four-curved screen bending device also includes a video recording unit, a mounting bracket and an adjustment structure. The video recording unit is arranged on the mounting bracket, and the video recording unit is used to record the bending process of the second part of the screen body. The adjustment structure is arranged between the video recording unit and the mounting bracket, and is used to adjust the angle of the video recording unit.

9. The equal-depth four-curved screen bending device according to any one of claims 1 to 5, characterized in that: The flipping mechanism includes a flipping bracket, a rotating swing arm, a transverse swing arm and a power unit. The first end of the rotating swing arm is rotatably set on the flipping bracket. The driving end of the power unit is connected to the first end of the rotating swing arm. The power unit is used to drive the rotating swing arm to swing around a first axis. The transverse swing arm is fixed to the second end of the rotating swing arm, and the transverse swing arm is set in a direction parallel to the first axis. The end of the transverse swing arm away from the rotating swing arm is the driving end of the flipping mechanism.

10. A method for bending four curved screens with equal depth, characterized in that: Using the equal-depth four-curved screen bending device according to any one of claims 1 to 9 comprises the following steps: Visual pre-correction: placing the first part of the screen on the movable platform, fixing the position of the first part of the screen, and obtaining the position of the first part of the screen on the movable platform through a visual detection unit; The screen position is corrected once. The position of the first part of the screen is compared with the preset position. If the actual position of the first part of the screen does not match the preset position, the horizontal position of the movable stage is adjusted until the first part of the screen is adjusted to the preset position. If the actual position of the first part of the screen matches the preset position, the movable stage is not adjusted. Transferring the second part of the screen body, pressing the second part of the screen body against the surface of the bending jig through the auxiliary flattening mechanism, and the auxiliary flattening mechanism assisting the bending jig in creating a vacuum to adsorb the second part of the screen body; The jig is flipped, and the bending jig is flipped at a preset angle under the action of the flipping mechanism, and the second part of the screen body is bent from the initial state to a state parallel to the first part of the screen body by the bending jig; Alignment detection: the visual inspection unit obtains images of the first part and the second part of the bent screen; Secondary correction of the screen position: compare the alignment mark on the first part of the screen with the alignment mark on the second part of the screen. If the position between the two alignment marks meets the preset conditions, the mobile stage will not move. If the two alignment marks do not meet the preset conditions, the position of the mobile stage will be adjusted to adjust the position of the first part of the screen. The screen body is pre-pressed. When the relative positions of the alignment marks on the first part of the screen body and the alignment marks on the second part of the screen body meet the preset conditions, the first drive group drives the bending jig to press the second part of the screen body. At the same time, the shaping block is also driven by the second drive group to press the second part of the screen body to shape the crease. Reset: The bending jig returns to its initial position under the action of the flipping mechanism.

Images