Slip Coil Test Fixture and Slip Coil Test System

Abstract

The present invention provides a sliding and curling test fixture for testing the sliding and curling characteristics of a flexible display module, comprising: an upper plate, a lower plate, a cover plate and a recovery plate; the upper plate and the lower plate are aligned, and the lower plate is movably connected to the upper plate, and the lower plate can reciprocate relative to the upper plate along a first direction so that the lower plate and the upper plate are staggered or overlapped with each other; the lower plate and the cover plate are aligned to form a cavity, and the recovery plate is located in the cavity; the recovery plate includes a plate body and a rolling connection structure, the rolling connection structures are located at opposite ends of the plate body, and the rolling connection structures are connected to the plate body; the arrangement direction of the opposite ends of the plate body where the rolling connection structures are located forms an angle greater than 0° with the first direction; rolling tracks are respectively arranged at positions of the lower plate and the cover plate corresponding to the rolling connection structures, and the rolling connection structures are movably connected to the rolling tracks, and the rolling connection structures can roll along the rolling tracks so that the plate body reciprocates in the first direction along with the movement of the lower plate. The test stability of this fixture is improved.

Description

Technical Field

[0001] The invention belongs to the field of display technology, and in particular relates to a rolling test fixture and a rolling test system. Background Art

[0002] In the field of display technology, flexible display modules are characterized by light weight and strong bending flexibility. Therefore, they have broadened the structural form of terminal devices. Terminal devices have made breakthroughs in folding, sliding and rolling forms, etc.

[0003] For flexible roll-up display modules (such as OLED, Organic Light-Emitting Diode, organic light-emitting diode display modules), the product's resistance to sliding and curling has become an important parameter. Therefore, before the flexible roll-up display module is shipped, it is necessary to use a roll-up test fixture to conduct a reliability test on its resistance to sliding and curling to ensure its shipment reliability. However, the existing roll-up test fixture has problems with its recycling board structure, which leads to frequent degumming and scratching of the display module, seriously affecting the test stability. Summary of the invention

[0004] In view of the above problems, the present invention provides a sliding curling test fixture for testing the sliding curling characteristics of a flexible display module, comprising: an upper plate, a lower plate, a cover plate and a recovery plate;

[0005] The upper plate and the lower plate are matched, and the lower plate is movably connected to the upper plate, and the lower plate can reciprocate relative to the upper plate along a first direction so that the lower plate and the upper plate are staggered or overlapped with each other;

[0006] The lower plate and the cover plate are matched to form a cavity, and the recovery plate is located in the cavity;

[0007] The recycling plate comprises a plate body and a rolling connection structure, wherein the rolling connection structure is located at two opposite ends of the plate body and is connected to the plate body;

[0008] The arrangement direction of the two opposite ends of the plate body where the rolling connection structure is located forms an angle greater than 0° with the first direction;

[0009] The positions of the lower plate and the cover plate corresponding to the rolling connection structure are respectively provided with rolling tracks, and the rolling connection structure is movably connected to the rolling track. The rolling connection structure can roll along the rolling track so that the plate body moves back and forth in the first direction with the movement of the lower plate.

[0010] Optionally, the rolling connection structure includes a connecting boss, a ball cage, balls and a connecting block;

[0011] The connecting boss is arranged at opposite ends of the plate body;

[0012] The ball cage is arranged on the end face of the connecting boss away from the plate body;

[0013] An opening is formed in the ball cage; the balls are located in the opening and can rotate 360° in any direction in the opening;

[0014] The connecting block is arranged on the side of the ball cage away from the connecting boss, and the connecting block is fixedly connected to the ball cage and the connecting boss through a first connecting piece.

[0015] Optionally, the rolling track includes a first groove, and the first groove is arranged on the side surface of the lower plate close to the cover plate; the first groove extends along the first direction;

[0016] The rolling track further includes a second groove, and the second groove is arranged on the side surface of the cover plate close to the lower plate; the second groove extends along the first direction;

[0017] The balls are embedded in the correspondingly-positioned first groove and second groove;

[0018] A first gap is formed between the plate body and the lower plate; a second gap is formed between the plate body and the cover plate.

[0019] Optionally, the lower plate includes a main body portion, a first sliding scroll and a second sliding scroll;

[0020] The first sliding scroll and the second sliding scroll are respectively arranged at opposite ends of the main body portion arranged along the first direction;

[0021] The first sliding scroll and the second sliding scroll are respectively connected to the main body portion, and both the first sliding scroll and the second sliding scroll can rotate clockwise and counterclockwise;

[0022] The first sliding scroll and the second sliding scroll are parallel to each other.

[0023] Optionally, the recovery plate further includes a flexible pre-tightening strip;

[0024] A profiling groove and a limiting groove are formed on the side surface of the plate body close to the cover plate;

[0025] The profiling groove is close to the first sliding scroll and away from the second sliding scroll, and the length direction of the profiling groove is parallel to the first sliding scroll;

[0026] The limiting groove is close to the second sliding reel and away from the first sliding reel, and the length direction of the limiting groove is parallel to the second sliding reel;

[0027] The flexible pre-tightening strip surrounds a side of the second sliding reel away from the main body and contacts the second sliding reel, one end of the flexible pre-tightening strip is fixed in the limiting groove, and the other end is fixed at a set position of the upper plate;

[0028] The length direction of the flexible pre-tightening strip is parallel to the first direction;

[0029] The flexible display module may be surrounded by a side of the first scroll away from the main body and in contact with the first scroll, a first side edge of the flexible display module may be fixed to the set position of the upper plate, and a second side edge of the flexible display module may be fixed in the contoured groove;

[0030] The first side and the second side of the flexible display module are opposite to each other and arranged along the first direction.

[0031] Optionally, there are two flexible pre-tightening strips;

[0032] There are two limiting grooves on the plate body;

[0033] The two flexible pre-tightening strips are fixed in the two limiting grooves in a one-to-one correspondence;

[0034] The two limiting grooves divide the length of the plate body along the second direction into three equal parts;

[0035] The second direction is perpendicular to the first direction.

[0036] Optionally, the recovery plate further comprises a limiting piece, the limiting piece is arranged in the limiting groove, and the limiting piece is located on a side of the flexible pre-tightening strip away from the limiting groove;

[0037] The limiting plate, the flexible pre-tightening strip and the limiting groove are fixedly connected via a second connecting member.

[0038] Optionally, the depth of the contoured groove is greater than the thickness of the flexible display module and less than the thickness of the board body;

[0039] The depth of the limiting groove is greater than the sum of the thickness of the flexible pre-tightening strip and the limiting sheet and less than the thickness of the plate body;

[0040] The distance between the surface of the flexible display module facing away from the profiling groove in the profiling groove and the cover plate is smaller than the distance between the surface of the flexible pre-tightening strip facing away from the limiting groove in the limiting groove and the cover plate.

[0041] Optionally, the cover plate includes a body structure, a first baffle, and a second baffle;

[0042] The first baffle and the second baffle are respectively arranged on opposite sides of the body structure along the first direction; and the first baffle and the second baffle are respectively connected to the body structure;

[0043] The first baffle can block one end face of the first groove and the second groove;

[0044] The second baffle can block the other end face of the first groove and the second groove.

[0045] The present invention also provides a sliding and curling test system, which includes a flexible display module and also includes the above-mentioned sliding and curling test fixture,

[0046] The flexible display module is fixed on the sliding and curling test fixture, and the sliding and curling test fixture drives the flexible display module to perform sliding and curling to test the sliding and curling characteristics of the flexible display module.

[0047] Advantages of the present invention: In the sliding and curling test fixture provided by the present invention, by setting the rolling connection structure and the rolling track, during the movement of the lower plate relative to the upper plate, the rolling friction exists between the plate body and the lower plate and the cover plate. Therefore, compared with the existing design, it can not only reduce the friction force between the plate body and the lower plate and the cover plate, but also avoid problems such as degumming and scratching of the flexible display module caused by excessive friction between the plate body and the lower plate and the cover plate, improving the test stability of the sliding and curling test fixture.

[0048] In the sliding and curling test system provided by the present invention, by adopting the above-mentioned sliding and curling test fixture, the sliding and curling test of the flexible display module can be made more stable, thereby improving the reliability and accuracy of the sliding and curling characteristic test of the flexible display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic structural assembly diagram of the sliding and curling test fixture in an embodiment of the present invention;

[0050] Figure 2 It is an exploded view of the structure of the sliding and curling test fixture in an embodiment of the present invention;

[0051] Figure 3 It is an exploded view of the recovery plate structure in an embodiment of the present invention;

[0052] Figure 4 is Figure 3 a schematic enlarged view of the structure of the rolling connection structure in the

[0053] Figure 5 a partial structural cross-sectional view of the recycling plate along the first direction in the embodiment of the present invention;

[0054] Figure 6 a stress principle diagram of the recycling plate in the embodiment of the present invention;

[0055] Figure 7a a front structural schematic diagram of the cover plate in the embodiment of the present invention;

[0056] Figure 7b a back structural schematic diagram of the cover plate in the embodiment of the present invention.

[0057] The reference numerals therein are:

[0058] 1, lower plate; 10, main body; 11, first sliding spool; 12, second sliding spool; 2, cover plate; 20, body structure; 21, first baffle; 22, second baffle; 3, recycling plate; 30, plate main body; 301, profiling groove; 302, limiting groove; 31, rolling connection structure; 310, connecting boss; 311, ball cage; 312, ball; 313, connecting block; 314, first connecting piece; 315, rubber gasket; 32, flexible pre-tightening strip; 33, limiting piece; 4, cavity; 5, rolling track; 51, first groove; 52, second groove; 6, flexible display module. Detailed implementation manners

[0059] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners for a slip-rolling test fixture and a slip-rolling test system.

[0060] To solve the problems of display module delamination and scratching caused by the self-structure problem of the recycling plate in the prior art, the embodiment of the present invention provides a slip-rolling test fixture, as Figures 1-6As shown, it is used to test the sliding curling characteristics of the flexible display module 6, including: an upper plate (not shown in the figure), a lower plate 1, a cover plate 2 and a recovery plate 3; the upper plate and the lower plate 1 are matched, and the lower plate 1 is movably connected to the upper plate, and the lower plate 1 can reciprocate relative to the upper plate along the first direction X, so that the lower plate 1 and the upper plate are staggered or overlapped with each other; the lower plate 1 and the cover plate 2 are matched to form a cavity 4, and the recovery plate 3 is located in the cavity 4; the recovery plate 3 includes a plate body 30 and a rolling connection structure 31, the rolling connection structure 31 is located at opposite ends of the plate body 30, and the rolling connection structure 31 is connected to the plate body 30; the arrangement direction Y of the opposite ends of the plate body 30 where the rolling connection structure 31 is located forms an angle greater than 0° with the first direction X; the positions of the corresponding rolling connection structures 31 of the lower plate 1 and the cover plate 2 are respectively provided with rolling tracks 5, the rolling connection structure 31 is movably connected to the rolling track 5, and the rolling connection structure 31 can roll along the rolling track 5, so that the plate body 30 moves back and forth in the first direction X with the movement of the lower plate 1.

[0061] Among them, in the existing design, the recovery plate 3 only includes the plate body 30. During the movement of the lower plate 1 relative to the upper plate, the plate body 30 is in surface contact with the lower plate 1 and the cover plate 2, and the plate body 30 is in surface-to-surface sliding friction with the lower plate 1 and the cover plate 2. In the embodiment of the present invention, by setting the rolling connection structure 31 and the rolling track 5, during the movement of the lower plate 1 relative to the upper plate, the plate body 30 is in rolling friction with the lower plate 1 and the cover plate 2. Compared with the existing design, it can not only reduce the friction between the plate body 30 and the lower plate 1 and the cover plate 2, but also avoid the problems of degumming and scratching of the flexible display module 6 caused by excessive friction between the plate body 30 and the lower plate 1 and the cover plate 2, thereby improving the test stability of the sliding test fixture.

[0062] Optionally, the flexible display module 6 can be any product or component with a flexible sliding and curling display function, such as an OLED panel, an OLED billboard, a display, a mobile phone, a navigator, etc.

[0063] Optionally, the rolling connection structure 31 includes a connecting boss 310, a ball retainer 311, a ball 312 and a connecting block 313; the connecting boss 310 is arranged at opposite ends of the plate body 30; the ball retainer 311 is arranged on the end face of the connecting boss 310 that is away from the plate body 30; an opening is opened on the ball retainer 311; the ball 312 is located in the opening and can rotate 360° in any direction in the opening; the connecting block 313 is arranged on the side of the ball retainer 311 that is away from the connecting boss 310, and the connecting block 313 is fixedly connected to the ball retainer 311 and the connecting boss 310 through a first connecting member 314.

[0064] Among them, the rolling connection structures 31 at the opposite ends of the plate body 30 are symmetrically arranged. In one rolling connection structure 31, there are two ball cages 311. The two ball cages 311 are stacked in sequence, and a rubber gasket 315 is arranged between the two ball cages 311; the rubber gasket 315 plays a role in anti-slip and buffering. Optionally, in one rolling connection structure 31, there are three balls 312; the three balls 312 are arranged in sequence along the first direction X. The balls 312 are made of stainless steel balls. The surfaces of the stainless steel balls 312 and the inner side surfaces of the openings on the ball cages 311 are surface-treated to achieve a certain smoothness, further reducing the friction between the balls 312 and the openings on the ball cages 311. The first connecting piece 314 uses an internal hexagonal screw, which is more firmly fixed.

[0065] Optionally, the rolling track 5 includes a first groove 51. The first groove 51 is arranged on the side surface of the lower plate 1 close to the cover plate 2; the first groove 51 extends along the first direction X; the rolling track 5 further includes a second groove 52. The second groove 52 is arranged on the side surface of the cover plate 2 close to the lower plate 1; the second groove 52 extends along the first direction X; the balls 312 are embedded in the correspondingly positioned first groove 51 and second groove 52; a first gap is formed between the plate body 30 and the lower plate 1; a second gap is formed between the plate body 30 and the cover plate 2.

[0066] Optionally, the balls 312 roll between the first groove 51 and the second groove 52. There is a certain gap between the rolling connection structures 31 at the opposite ends of the recovery plate 3 and the side walls of the cavity 4 opposite thereto. Coupled with the settings of the first gap and the second gap, the recovery plate 3 will not interfere with the lower plate 1 and the cover plate 2 during the movement along the first direction X in the cavity 4. Optionally, the inner surface of the first groove 51 and the second groove 52 is specially surface-treated to reduce its surface roughness, thereby reducing the friction between the inner surface of the groove and the surface of the balls 312.

[0067] Optionally, the lower plate 1 includes a main body portion 10, a first sliding roller shaft 11 and a second sliding roller shaft 12; the first sliding roller shaft 11 and the second sliding roller shaft 12 are respectively arranged at the opposite ends of the main body portion 10 arranged along the first direction X; the first sliding roller shaft 11 and the second sliding roller shaft 12 are respectively connected to the main body portion 10, and both the first sliding roller shaft 11 and the second sliding roller shaft 12 can rotate clockwise and counterclockwise; the first sliding roller shaft 11 and the second sliding roller shaft 12 are parallel to each other.

[0068] Optionally, the recovery plate 3 also includes a flexible pre-tightening strip 32; a profiling groove 301 and a limiting groove 302 are formed on one side of the plate body 30 close to the cover plate 2; the profiling groove 301 is close to the first sliding reel 11 and away from the second sliding reel 12, and the length direction of the profiling groove 301 is parallel to the first sliding reel 11; the limiting groove 302 is close to the second sliding reel 12 and away from the first sliding reel 11, and the length direction of the limiting groove 302 is parallel to the second sliding reel 12; the flexible pre-tightening strip 32 surrounds the side of the second sliding reel 12 away from the main body 10 and is in contact with The flexible pre-tightening strip 32 contacts the second sliding scroll 12, one end of the flexible pre-tightening strip 32 is fixed in the limiting groove 302, and the other end is fixed in the set position of the upper plate; the length direction of the flexible pre-tightening strip 32 is parallel to the first direction X; the flexible display module 6 can be wrapped around the side of the first sliding scroll 11 away from the main body 10 and contact the first sliding scroll 11, the first side edge of the flexible display module 6 can be fixed in the set position of the upper plate, and the second side edge of the flexible display module 6 can be fixed in the contoured groove 301; the first side edge and the second side edge of the flexible display module 6 are opposite to each other and arranged along the first direction X.

[0069] The profiling groove 301 is modeled after the shape of the second side of the flexible display module 6, so that the profiling groove 301 can better fix the second side. The profiling groove 301 and the second side of the flexible display module 6 are bonded by adhesive. The limiting groove 302 and the flexible pre-tightening strip 32 are bonded by adhesive. The adhesive has the characteristics of strong viscosity and resistance to high temperature and high humidity, so as to meet the reliability test of the flexible display module 6 in harsh environments.

[0070] Optionally, the recovery plate 3 also includes a limiting plate 33, which is arranged in the limiting groove 302, and the limiting plate 33 is located on the side of the flexible pre-tightening strip 32 away from the limiting groove 302; the limiting plate 33, the flexible pre-tightening strip 32 and the limiting groove 302 are fixedly connected by a second connecting member.

[0071] The limiting piece 33 is a limiting steel sheet, which can well limit and fix the flexible pre-tightening strip 32 in the limiting groove 302. Optionally, the second connecting member can be an adhesive or a screw.

[0072] Optionally, the depth of the profiling groove 301 is greater than the thickness of the flexible display module 6 and less than the thickness of the board body 30; the depth of the limiting groove 302 is greater than the sum of the thicknesses of the flexible pre-tightening strip 32 and the limiting piece 33 and less than the thickness of the board body 30; the distance between the surface of the side of the flexible display module 6 in the profiling groove 301 that is away from the profiling groove 301 and the cover plate 2 is smaller than the distance between the surface of the side of the flexible pre-tightening strip 32 in the limiting groove 302 that is away from the limiting groove 302 and the cover plate 2. That is, there is a step difference between the flexible display module 6 and the surface of the flexible pre-tightening strip 32 that is away from the board body 30.

[0073] In this embodiment, the flexible display module 6 and the flexible pre-tightening strip 32 are fixed on the recycling plate 3 and the upper plate to form a loop surrounding the lower plate 1 in the up-and-down direction (the side where the upper and lower plate surfaces are located) and the left-and-right direction (the side where the first sliding scroll 11 and the second sliding scroll 12 are located). When the lower plate 1 moves relative to the upper plate and is offset from the upper plate, the flexible display module 6 slides and flattens around the first sliding scroll 11 under the pushing action of the lower plate 1. At the same time, the flexible pre-tightening strip 32 slides and curls around the second sliding scroll 12 under the pushing action of the lower plate 1. When the lower plate 1 moves relative to the upper plate to overlap with the upper plate, the flexible display module 6 slides and curls around the first sliding scroll 11 under the pushing action of the lower plate 1. At the same time, the flexible pre-tightening strip 32 slides and flattens around the second sliding scroll 12 under the pushing action of the lower plate 1. That is, during the reciprocating movement of the lower plate 1 relative to the upper plate along the first direction X, the recycling plate 3 also makes a reciprocating movement in the same direction as the movement direction of the lower plate 1 along the first direction X in the cavity 4 formed between the lower plate 1 and the cover plate 2, so as to achieve the purpose of testing the sliding and curling of the flexible display module 6. Among them, the main function of the flexible pre-tightening strip 32 is to apply a pre-tightening force to the recycling plate 3 to prevent the flexible display module 6 from having too large a camber during the sliding and curling test.

[0074] As Figure 6As shown, due to the inherent characteristics of the material, the flexible display module 6 generates a lifting force F1 in the sliding and curling state, and this force changes with the change of the sliding and curling distance. When the flexible display module 6 is in the flattened state, the lifting force F1 is the largest. In the existing sliding and curling test fixture without the rolling connection structure 31, under the influence of this lifting force F1, the side of the recovery plate 3 away from the first sliding shaft 11 will be lifted accordingly, resulting in sliding friction with the cover plate 2, thus frequently causing the phenomena of the flexible display module 6 coming unstuck and being scratched. In the existing sliding and curling test fixture without the rolling connection structure 31, if the gap between the recovery plate 3 and the cover plate 2 is too large, the surface step difference between the flexible display module 6 and the side of the flexible pre-tightening strip 32 away from the plate body 30 will generate a moment under the action of the pre-tightening force F2 of the flexible pre-tightening strip 32, causing the recovery plate 3 to rotate, which will also lead to the phenomenon of the flexible display module 6 coming unstuck. In the existing sliding and curling test fixture, by adjusting the pre-tightening force F2 of the flexible pre-tightening strip 32 and adjusting the surface step difference between the flexible display module 6 and the flexible pre-tightening strip 32, the occurrence of rotation can be alleviated to some extent. However, in actual situations, it is very difficult to reduce the surface step difference between the flexible display module 6 and the flexible pre-tightening strip 32 to 0, and it is also very difficult to find a suitable pre-tightening force F2 of the flexible pre-tightening strip 32. In this embodiment, by providing rolling connection structures 31 at the opposite ends of the plate body 30 of the recovery plate 3, rolling tracks 5 are respectively provided at the positions of the lower plate 1 and the cover plate 2 corresponding to the rolling connection structures 31, and the rolling connection structures 31 roll along the rolling tracks 5, so that the sliding friction between the recovery plate 3 and the lower plate 1 and the cover plate 2 in the existing sliding and curling test fixture can be changed into rolling friction, thereby reducing the frictional force between the recovery plate 3 and the lower plate 1 and the cover plate 2. In addition, the design of the balls 312 in the rolling connection structure 31 can also support the plate body 30, preventing the plate body 30 from being uneven front and back and generating rotation under the action of the moment, thereby avoiding the occurrence of friction.

[0075] Optionally, there are two flexible pre-tightening strips 32; there are two limiting grooves 302 on the plate body 30; the two flexible pre-tightening strips 32 are respectively fixedly arranged in the two limiting grooves 302 in a one-to-one correspondence; the two limiting grooves 302 trisect the length of the plate body 30 in the second direction; the second direction is perpendicular to the first direction X.

[0076] Wherein, the second direction is the arrangement direction Y of the opposite ends of the plate body 30 where the rolling connection structure 31 is located. The position setting of the two flexible pre-tightening strips 32 in this embodiment can make the recovery plate 3 more balanced during the reciprocating movement along the first direction X, and the position of the recovery plate 3 will not be skewed, thereby making the test of this sliding and curling test fixture more stable.

[0077] Optionally, as Figure 7a and Figure 7bAs shown in the figure, the cover plate 2 includes a body structure 20, a first baffle 21 and a second baffle 22; the first baffle 21 and the second baffle 22 are respectively arranged on opposite sides of the body structure 20 along the first direction X; and the first baffle 21 and the second baffle 22 are respectively connected to the body structure 20; the first baffle 21 can block one end face of the first groove 51 and the second groove 52; the second baffle 22 can block the other end face of the first groove 51 and the second groove 52.

[0078] Among them, the settings of the first groove 51 and the second groove 52 not only play a guiding role for the balls 312, but also improve the deviation errors generated at the opposite ends of the plate body 30 along the second direction when manually loading the flexible pre-tightening strip 32, that is, have a certain deviation correction effect on the plate body 30. In addition, the first baffle 21 and the second baffle 22 are respectively arranged on opposite sides of the cover plate 2 body structure 20 along the first direction X, which can effectively prevent foreign objects from entering the first groove 51 and the second groove 52 from the ends, thereby avoiding the phenomenon that the balls 312 rolling in the first groove 51 and the second groove 52 are stuck.

[0079] The sliding and curling test fixture provided in this embodiment, by setting the rolling connection structure 31 and the rolling track 5, makes the plate body 30 have rolling friction with the lower plate 1 and the cover plate 2 during the movement of the lower plate 1 relative to the upper plate. Therefore, compared with the existing design, it can not only reduce the friction force between the plate body 30 and the lower plate 1 and the cover plate 2, but also avoid problems such as the delamination and scratching of the flexible display module 6 caused by excessive friction between the plate body 30 and the lower plate 1 and the cover plate 2, improving the test stability of the sliding and curling test fixture.

[0080] The embodiment of the present invention also provides a sliding and curling test system, which includes a flexible display module and also includes the sliding and curling test fixture in the above embodiment. The flexible display module is fixed on the sliding and curling test fixture, and the sliding and curling test fixture drives the flexible display module to perform sliding and curling to test the sliding and curling characteristics of the flexible display module.

[0081] By adopting the sliding and curling test fixture in the above embodiment, the sliding and curling test of the flexible display module can be made more stable, thereby improving the reliability and accuracy of the sliding and curling characteristic test of the flexible display module.

[0082] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, and the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A sliding and curling test fixture for testing the sliding and curling characteristics of a flexible display module, comprising: Upper plate, lower plate, cover plate and recovery plate; The upper plate and the lower plate are matched, and the lower plate is movably connected to the upper plate, and the lower plate can reciprocate relative to the upper plate along a first direction so that the lower plate and the upper plate are staggered or overlapped with each other; The lower plate and the cover plate are matched to form a cavity, and the recovery plate is located in the cavity; Characterized in that the recovery plate comprises a plate body and a rolling connection structure, wherein the rolling connection structure is located at opposite ends of the plate body and the rolling connection structure is connected to the plate body; The arrangement direction of the two opposite ends of the plate body where the rolling connection structure is located forms an angle greater than 0° with the first direction; A first gap is formed between the plate body and the lower plate; a second gap is formed between the plate body and the cover plate; The positions of the lower plate and the cover plate corresponding to the rolling connection structure are respectively provided with rolling tracks, and the rolling connection structure is movably connected to the rolling track. The rolling connection structure can roll along the rolling track so that the plate body moves back and forth in the first direction with the movement of the lower plate.

2. The slip-rolling test fixture according to claim 1, characterized in that, The rolling connection structure comprises a connecting boss, a ball retainer, balls and a connecting block; The connecting bosses are arranged at opposite ends of the plate body; The ball retainer is arranged on the end surface of the connecting boss which is away from the plate body; The ball retainer is provided with an opening; the ball is located in the opening and can rotate 360° in any direction in the opening; The connecting block is arranged on a side of the ball retainer away from the connecting boss, and the connecting block is fixedly connected to the ball retainer and the connecting boss via a first connecting member.

3. The slip-roll test fixture according to claim 2, wherein, The rolling track includes a first groove, which is arranged on a side of the lower plate close to the cover plate; the first groove extends along the first direction; The rolling track further includes a second groove, which is arranged on a side surface of the cover plate close to the lower plate; the second groove extends along the first direction; The balls are embedded in the first groove and the second groove which are located correspondingly.

4. The slip-rolling test fixture according to claim 3, wherein, The lower plate includes a main body, a first sliding reel and a second sliding reel; The first sliding reel and the second sliding reel are respectively arranged at two opposite ends of the main body along the first direction; The first sliding reel and the second sliding reel are respectively connected to the main body, and the first sliding reel and the second sliding reel can rotate clockwise and counterclockwise; The first sliding reel and the second sliding reel are parallel to each other.

5. The slip-roll test fixture according to claim 4, characterized in that, The recovery plate also includes a flexible pre-tightening strip; A contour groove and a limiting groove are formed on one side surface of the plate body close to the cover plate; The profiling groove is close to the first sliding reel and far away from the second sliding reel, and the length direction of the profiling groove is parallel to the first sliding reel; The limiting groove is close to the second sliding reel and away from the first sliding reel, and the length direction of the limiting groove is parallel to the second sliding reel; The flexible pre-tightening strip surrounds a side of the second sliding reel away from the main body and contacts the second sliding reel, one end of the flexible pre-tightening strip is fixed in the limiting groove, and the other end is fixed at a set position of the upper plate; The length direction of the flexible pre-tightening strip is parallel to the first direction; The flexible display module may be surrounded by a side of the first scroll away from the main body and in contact with the first scroll, a first side edge of the flexible display module may be fixed to the set position of the upper plate, and a second side edge of the flexible display module may be fixed in the contoured groove; The first side and the second side of the flexible display module are opposite to each other and arranged along the first direction.

6. The coiling test fixture according to claim 5, wherein There are two flexible pre-tightening strips; There are two limiting grooves on the plate body; The two flexible pre-tightening strips are fixed in the two limiting grooves in a one-to-one correspondence; The two limiting grooves divide the length of the plate body along the second direction into three equal parts; The second direction is perpendicular to the first direction.

7. The slip-roll test fixture according to claim 5, wherein, The recovery plate further comprises a limiting piece, which is arranged in the limiting groove, and the limiting piece is located on a side of the flexible pre-tightening strip away from the limiting groove; The limiting plate, the flexible pre-tightening strip and the limiting groove are fixedly connected via a second connecting member.

8. The sliding and coiling test fixture according to claim 7, wherein, The depth of the contoured groove is greater than the thickness of the flexible display module and less than the thickness of the board body; The depth of the limiting groove is greater than the sum of the thickness of the flexible pre-tightening strip and the limiting sheet and less than the thickness of the plate body; The distance between the side surface of the flexible display module located in the profiling groove and the cover plate is smaller than the distance between the side surface of the flexible pre-tightening strip located in the limiting groove and the cover plate.

9. The slip-roll test fixture according to claim 3, wherein, The cover plate includes a body structure, a first baffle plate and a second baffle plate; The first baffle plate and the second baffle plate are disposed on opposite sides of the main body structure along the first direction; and the first baffle plate and the second baffle plate are connected to the main body structure respectively; The first baffle can cover one end surface of the first groove and the second groove; The second baffle can shield the other end surfaces of the first groove and the second groove.

10. A slip-roll test system, comprising a flexible display module, characterized in that, It also includes the sliding test fixture according to any one of claims 1 to 9, The flexible display module is fixed on the sliding and curling test fixture, and the sliding and curling test fixture drives the flexible display module to slide and curl, so as to test the sliding and curling characteristics of the flexible display module.

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