CN213933074U

CN213933074U - Display module assembly test fixture that bends

Info

Publication number: CN213933074U
Application number: CN202023133111.XU
Authority: CN
Inventors: 俞强; 乔贵洲; 赵欢
Original assignee: Hefei Visionox Technology Co Ltd
Current assignee: Hefei Visionox Technology Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-08-10
Anticipated expiration: 2030-12-23

Abstract

The utility model relates to the technical field of film bending tests, in particular to a display module bending test tool, which comprises at least two platforms which are connected in sequence, wherein each two adjacent platforms are connected in a turnover way through a turnover assembly; the overturning assembly comprises a connecting block, a first tooth-shaped member and a second tooth-shaped member, the first tooth-shaped member is rotationally connected with the connecting block through a first rotating shaft, and the second tooth-shaped member is rotationally connected with the connecting block through a second rotating shaft; the first tooth-shaped part is fixedly connected with one of the two adjacent platforms, the second tooth-shaped part is fixedly connected with the other of the two adjacent platforms, and the first tooth-shaped part is meshed with the second tooth-shaped part so that the two adjacent platforms can be turned over. The above-mentioned setting makes the upset in-process, and the circular arc length that display module group formed between two adjacent platforms equals or is close pi R all the time to avoided test fixture to apply for the extra tensile stress of display module group, avoided the condition of producing bubble, crackle, layering or fracture between each rete of display module group.

Description

Display module assembly test fixture that bends

Technical Field

The utility model relates to a crooked test technical field of film especially relates to a display module assembly test fixture that bends.

Background

The bending test of the flexible folding display module is generally completed through a bending test tool, but the rotation between platforms is usually realized through a single rotating shaft when the existing bending test tool is used for performing a U-shaped outward bending test or inward bending test. Fig. 1 is a movement track of a first platform 21 ' in a conventional bending test fixture, and it can be seen that, in a first state, the first platform 21 ' and a second platform 22 ' are located on the same horizontal plane, and a linear distance between the first platform 21 ' and the second platform 22 ' is L1; in the second state, the first platform 21 'is perpendicular to the second platform 22', and the straight-line distance between the two platforms is L2; in the third state, the first flipping panel 21 'is located parallel above the second platform 22' with a linear distance L3 therebetween. In order to ensure that the arc length of the display module after being folded is equal to the length of the display module before being folded, L3 is generally set to be 2R, and L1 is generally set to be pi R (where R refers to the bending radius of the display module, and the value of R is one half of the distance between the upper end and the lower end of the display module after the first platform 21 'and the second platform 22' are bent to the third state). As shown in FIG. 1, during the entire turning process, the linear distance between the first platform 21 'and the second platform 22' will be increased and then decreased, i.e. L1 < L2 > L3. That is, the linear distance between the first platform 21 'and the second platform 22' during the flipping process may be larger than pi R (e.g., L2 > L1 pi R).

Because the display module is fixed on the first platform 21 'and the second platform 22', in the non-folded state (i.e. the first state in fig. 1), the length of the display module between the first platform 21 'and the second platform 22' is equal to L1, and is also pi R; after the rotation starts (e.g., the second state and the third state shown in fig. 1), the length of the arc formed by the display module between the first platform 21 'and the second platform 22' is greater than the linear distance between the first platform 21 'and the second platform 22' (i.e., the length of the arc is greater than the corresponding chord length). That is, when the chord length is larger than pi R during the flipping process (e.g. L2), the arc length of the display module between the first platform 21 'and the second platform 22' is also larger than pi R. The reason results in, at the in-process of bending, the extra tensile stress of display module assembly can be applyed to the test fixture that bends for produce defects such as bubble, crackle, layering or fracture between each rete of display module assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a display module assembly test fixture that bends to solve the test procedure of bending display module assembly can receive the problem of the tensile stress that test fixture applyed of bending.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a display module bending test tool, which comprises at least two platforms connected in sequence, wherein each two adjacent platforms can be connected in a turnover way through a turnover component;

the overturning assembly comprises a connecting block, a first tooth-shaped member and a second tooth-shaped member, the first tooth-shaped member is rotationally connected with the connecting block through a first rotating shaft, and the second tooth-shaped member is rotationally connected with the connecting block through a second rotating shaft; the first tooth-shaped part is fixedly connected with one of the two adjacent platforms, the second tooth-shaped part is fixedly connected with the other of the two adjacent platforms, and the first tooth-shaped part is meshed with the second tooth-shaped part so as to enable the two adjacent platforms to be overturned; each platform is used for fixing a display module, wherein each two adjacent platforms can be turned over at 0-180 degrees or-180-0 degrees.

Optionally, one of the two adjacent platforms is a movable platform, the other one of the two adjacent platforms is a fixed platform, the movable platform can rotate relative to the fixed platform, the first toothed element is fixed with the movable platform, and the second toothed element is fixed with the fixed platform; during the overturning process, the first tooth-shaped part is in meshing transmission with the second tooth-shaped part, and the first tooth-shaped part can rotate around the periphery of the second tooth-shaped part.

Optionally, the display module bending test tool further comprises a driving mechanism and a turnover connecting rod, the turnover connecting rod is connected with the movable platform in a sliding manner, the driving mechanism can drive the turnover connecting rod to rotate, and the turnover connecting rod can drive the movable platform to turn over; in the overturning process, the movable platform and the overturning connecting rod can slide relatively.

Optionally, the number of the platforms is two, and the first platform and the second platform are respectively a first platform and a second platform, the first platform is fixedly connected with the first tooth-shaped member, and the second platform is fixedly connected with the second tooth-shaped member.

Optionally, when the display module is folded inwards, the distance between the first platform and the second platform is pi R1, the first platform and the second platform can be turned over between 0 and 180 degrees, where R1 is one half of the distance between two ends of the display module when the first platform and the second platform are bent 180 degrees from a flat state.

Optionally, when the display module is folded outwards, the distance between the first platform and the second platform is pi R2, the first platform and the second platform can be turned over at-180 to 0 degrees, where R2 is one half of the distance between two ends of the display module when the first platform and the second platform are bent at-180 degrees from a flat state.

Optionally, the number of the platforms is three, and the platforms are respectively a first platform, a second platform and a third platform which are connected in turn in a reversible manner; the first platform is fixedly connected with one first tooth-shaped part, two ends of the second platform are fixedly connected with the two second tooth-shaped parts in a one-to-one correspondence mode respectively, and the third platform is fixedly connected with the other first tooth-shaped part.

Optionally, the first platform and the third platform are both movable platforms, the second platform is a fixed platform, and both the first platform and the third platform can rotate relative to the second platform.

Optionally, the distance between the first rotating shaft and the second rotating shaft on the connecting block is adjustable.

Optionally, each of the first tooth-shaped member and the second tooth-shaped member includes a connecting rod and a ring disposed at one end of the connecting rod, and a plurality of teeth are disposed at intervals on a circumferential portion of the ring; the connecting rod be used for with correspond platform fixed connection, the hole of ring be used for with correspond first pivot or the second pivot is connected.

The utility model has the advantages that:

the utility model provides a display module assembly test fixture that bends, through setting up two pivots, make the linear distance between two adjacent platforms in the upset process progressively dwindle in succession, and be less than pi R all the time (wherein R's numerical value is 180 degrees or-180 degrees back display module assembly both ends half of distance for two adjacent platforms are buckled), can guarantee simultaneously that the circular arc that display module assembly formed between two adjacent platforms remains tangent with two platforms all the time, circular arc length equals or is close pi R all the time, thereby avoided test fixture to apply for the extra tensile stress of display module assembly, avoid the each rete intervallum gassing of display module assembly, cracks, layering or cracked condition.

Further, when one of the two adjacent platforms is a movable platform and the other is a fixed platform, the driving mechanism drives the turnover connecting rod to rotate, the turnover connecting rod drives the movable platform to rotate, the movable platform drives the first toothed part and the second toothed part to be in meshing transmission, the first toothed part is made to rotate along the periphery of the second toothed part, meanwhile, the movable platform and the turnover connecting rod still slide relatively, and finally the movable platform is turned over in a range of 0-180 degrees or-180-0 degrees relative to the fixed platform.

Drawings

FIG. 1 is a schematic view illustrating a bending process of a first platform and a second platform in the prior art;

fig. 2 is a schematic structural view of a display module bending test fixture in an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a front view of a display module bending test fixture including three platforms according to an embodiment of the present invention;

fig. 5 is a top view of the display module bending test fixture including three platforms according to the embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of a display module bending test fixture in an inward bending and outward bending form according to an embodiment of the present invention before bending;

fig. 7 is a schematic cross-sectional view of the display module bending test fixture in fig. 6 in a bending completed state;

fig. 8 is a schematic cross-sectional view of a flat-type double-fold display module bending test fixture provided in an embodiment of the present invention in a state of being bent;

fig. 9 is a schematic cross-sectional view of a flat-laid double-fold display module bending test fixture provided in an embodiment of the present invention in a state of being bent;

fig. 10 is a schematic cross-sectional view of a winding-type double-in-folding display module bending test fixture in a bending completed state according to an embodiment of the present invention;

fig. 11 is a schematic sectional view of a winding-type double-outward-folding display module bending test fixture in a bending completed state according to an embodiment of the present invention;

fig. 12 is a schematic view of the bending process in which the first platform and the second platform are turned over simultaneously according to the embodiment of the present invention;

fig. 13 is a schematic view illustrating a bending process of the first platform turning over relative to the second platform according to the embodiment of the present invention.

In the figure:

21', a first platform; 22', a second platform;

1. connecting blocks; 11. a fixing plate; 12. a fixed beam;

21. a first platform; 22. a second platform; 23. a third platform;

31. a first tooth-shaped member; 32. a second toothed member;

41. a first rotating shaft; 42. a second rotating shaft;

51. turning over the connecting rod;

61. a first slide rail; 611. a first slider;

71. a support frame;

81. a drive mechanism;

100. a display module.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 2 to 5, the present embodiment provides a display module bending test fixture, which includes at least two platforms connected in sequence, wherein each two adjacent platforms are connected in a reversible manner through a turning assembly; the overturning assembly comprises a connecting block 1, a first tooth-shaped member 31 and a second tooth-shaped member 32, wherein the first tooth-shaped member 31 is rotatably connected with the connecting block 1 through a first rotating shaft 41, and the second tooth-shaped member 32 is rotatably connected with the connecting block 1 through a second rotating shaft 42; the first tooth-shaped member 31 is fixedly connected with one of the two adjacent platforms, the second tooth-shaped member 32 is fixedly connected with the other of the two adjacent platforms, and the first tooth-shaped member 31 is meshed with the second tooth-shaped member 32 so as to enable the two adjacent platforms to be turned over; each platform is used for fixing the display module 100, wherein each two adjacent platforms can be turned over at 0-180 degrees or-180-0 degrees.

In the embodiment, by arranging the two rotating shafts, the linear distance between the two adjacent platforms is gradually and continuously reduced in the overturning process, and is always smaller than pi R (wherein the numerical value of R is one half of the distance between the two ends of the display module 100 after the two adjacent platforms are bent by 180 degrees or minus 180 degrees), and meanwhile, the arc formed by the display module 100 between the two adjacent platforms can be always kept tangent to the two platforms, and the length of the arc is always equal to or close to pi R, so that the extra tensile stress applied to the display module 100 by a test tool is avoided, and the condition that bubbles, cracks, layering or fracture are generated between the films of the display module 100 is avoided.

In the process of bending the display module 100, a lead needs to be connected from the FPC end of the display module 100 to connect to a corresponding detection mechanism. In order to prevent the platform from turning over with the wires connected to the display module 100 during the turning process, so that the connection relationship between the wires and the display module 100 is affected, in this embodiment, preferably, one of the two adjacent platforms is a movable platform, and the other platform is a fixed platform, and the movable platform can rotate relative to the fixed platform. Wherein, the first tooth-shaped member 31 is fixed with the movable platform, and the second tooth-shaped member 32 is fixed with the fixed platform; the fixed platform is supported by a support bracket 71. During the overturning process, the first tooth-shaped member 31 is in mesh transmission with the second tooth-shaped member 32, and the first tooth-shaped member 31 can rotate around the outer periphery of the second tooth-shaped member 32. During a bending test, the connecting end of the display module 100 and the lead is mounted on the fixed platform, and the arrangement enables the position of one end of the display module 100 connected with the lead to be kept still during the bending test, so that the lead connected with the display module 100 is also kept still, and the improvement of the connection stability between the lead and the display module 100 is facilitated on one hand; on the other hand, the service life of the lead is prolonged.

Further, the display module bending test tool further comprises a driving mechanism 81 and a turnover connecting rod 51, the turnover connecting rod 51 is connected with the movable platform in a sliding mode, the driving mechanism 81 can drive the turnover connecting rod 51 to rotate, and the turnover connecting rod 51 can drive the movable platform to turn over; during the overturning process, the movable platform and the overturning connecting rod 51 can slide relatively. In the present embodiment, the driving mechanism 81 may be, but is not limited to, a stepping motor. This setting can accurate control movable platform around fixed platform pivoted speed and angle, has improved degree of automation and bending test efficiency. In addition, since the first toothed element 31 can rotate around the periphery of the second toothed element 32, the axis of the movable platform constantly changes while the turnover connecting rod 51 drives the movable platform to rotate around the fixed platform, and at this time, if the axis of the turnover connecting rod 51 is fixed, the movement cannot be realized. Therefore, in the present embodiment, the movable platform and the turning link 51 can slide relative to each other, and the movable platform can adapt to the situation of the change of the axis of the movable platform. Optionally, the tilting link 51 is slidably connected to the movable platform via a sliding assembly.

In an optional embodiment of the present invention, the number of the platforms is two, and the first platform 21 and the second platform 22 are respectively, the first platform 21 is fixedly connected to the first toothed element 31, and the second platform 22 is fixedly connected to the second toothed element 32, so that the single-folding bending test of the display module 100 can be realized. In this embodiment, the sliding assembly includes a first sliding rail 61 and a first sliding block 611, the first sliding rail 61 is disposed on the turnover connecting rod 51, the first sliding block 611 is disposed on the first platform 21, and the turnover connecting rod 51 and the first platform 21 are slidably connected through the cooperation of the first sliding rail 61 and the first sliding block 611. The arrangement can realize the relative sliding between the turnover connecting rod 51 and the first platform 21, and the bending test of the display module 100 is completed.

It should be noted that, in this embodiment, the inward folding means that the display module 100 is located inside the platform after the display module 100 is folded along with the platform, and the outward folding means that the display module 100 is located outside the platform after the display module 100 is folded along with the platform.

Optionally, when the display module 100 of the embodiment is folded inward, an initial distance between the first platform 21 and the second platform 22 (i.e., when the display module 100 is folded flat) is pi R1, and the first platform 21 and the second platform 22 can be turned over between 0 to 180 degrees, where R1 is a bending radius of the display module 100, and a value of the bending radius is one half of a distance between two ends of the display module 100 when the first platform 21 and the second platform 22 are bent 180 degrees from a flat state. When the display module 100 of the present embodiment is folded outward, the initial distance between the first platform 21 and the second platform 22 (i.e. when the display module 100 is folded flat) is pi R2, and the first platform 21 and the second platform 22 can be turned over at-180 to 0 degrees, where R2 is the bending radius of the display module 100, and the value of the bending radius is one half of the distance between two ends of the display module 100 when the first platform 21 and the second platform 22 are bent at-180 degrees from the flat state. This setting makes this embodiment can accomplish and carries out the bending test of infolding and folding outward to display module assembly 100. Since the bending radius of the display module 100 of the present embodiment is smaller when folded inward and larger when folded outward, i.e. R1 < R2, the initial distance between the first platform 21 and the second platform 22 when folded outward should be larger than the initial distance between the first platform 21 and the second platform 22 when folded inward. The specific values of R1 and R2 can be set according to actual needs, and can be selected from 1.0mm to 6.0mm, for example. Correspondingly, the distance between the first rotating shaft 41 and the second rotating shaft 42 can be selected from 2mm to 10mm, for example, 2mm, 2.5mm, 3mm, 3.5mm, etc., and the distance between the shafts should be set to facilitate the machining of the teeth on the toothed member.

Because the existing bending test tool cannot perform three-section or multi-section bending test and bending test of different types of combinations of the display module 100. Therefore, in an optional embodiment of the present invention, the number of the platforms may also be three, and the three platforms are respectively a first platform 21, a second platform 22 and a third platform 23 which are connected in turn and can be turned over; the first platform 21 is fixedly connected with one first tooth-shaped member 31, two ends of the second platform 22 are fixedly connected with two second tooth-shaped members 32 in a one-to-one correspondence manner, and the third platform 23 is fixedly connected with the other first tooth-shaped member 31. This setting makes this embodiment can carry out the three-section test of buckling to display module assembly 100, enlarges the application scope of this implementation.

Further, the first platform 21 and the third platform 23 are both movable platforms, the second platform 22 is a fixed platform, and both the first platform 21 and the third platform 23 can rotate relative to the second platform 22. In this embodiment, the first platform 21 is driven by one turning link 51, and the third platform 23 is driven by another turning link 51, and the driving manner is the same as that described above, and is not described herein again. Further, the flip link 51 and the first platform 21, and the flip link 51 and the third platform 23 are slidably connected through a sliding assembly. In this embodiment, the relative sliding between the flip link 51 and the first platform 21, and between the flip link 51 and the third platform 23 are achieved, so as to complete the three-stage bending test of the display module 100.

The present embodiment exemplarily shows a specific bending form of the three-stage bending test as follows. Fig. 6 is a schematic cross-sectional view of a display module bending test fixture in an inward bending and outward bending form according to an embodiment of the present invention before bending; fig. 7 is a schematic cross-sectional view of the display module bending test fixture in fig. 6 in a bending completed state. As shown in fig. 6-7, the display module 100 is folded inward once and folded outward once, and the radii of the two folds are different, and the whole is S-shaped after being folded. Fig. 8 is the embodiment of the utility model provides a two interior display module assembly test fixture that bend of tiled is at the section view schematic diagram under the completion state of buckling, wherein display module assembly 100 has done twice interior book, and the radius of buckling of twice interior book is the same. Fig. 9 is the embodiment of the utility model provides a two outer display module assembly test fixture that bend of tiled is in the section view schematic diagram under the completion state of buckling, wherein display module assembly 100 has done twice outer book, and the radius of buckling of twice outer book is the same. Fig. 10 is a schematic sectional view of a winding-type double-inward-folding display module bending test fixture in a bending completion state, in which the display module 100 is folded twice, and the bending radius of the two inward folds is different. Fig. 11 is a schematic sectional view of a display module bending test fixture in a bending completion state according to an embodiment of the present invention, in which the display module 100 is bent twice, and the bending radius of the bent twice is different.

Optionally, the distance between the first rotating shaft 41 and the second rotating shaft 42 on the connecting block 1 is adjustable. Specifically, the connecting block 1 is provided with a plurality of mounting holes, wherein two mounting holes are respectively used for mounting the first rotating shaft 41 and the second rotating shaft 42. When being provided with a plurality of platforms, all be equipped with connecting block 1 between every platform, and every connecting block 1 all is equipped with a plurality of mounting holes. This setting makes the distance between two pivots on every connecting block 1 all adjustable to satisfy the different demand of buckling. It should be noted that when the distance between two rotating shafts on the same connecting block 1 changes, the tooth-shaped members with corresponding sizes need to be replaced to realize the meshing between the tooth-shaped members.

Optionally, each of the first tooth-shaped member 31 and the second tooth-shaped member 32 includes a connecting rod and a circular ring disposed at one end of the connecting rod, and a plurality of teeth are disposed at intervals on a circumferential portion of the circular ring; the connecting rod is used for being fixedly connected with a corresponding platform, and the inner hole of the circular ring is used for being connected with a corresponding first rotating shaft 41 or a corresponding second rotating shaft 42. Further, in the process that the first platform 21 is bent 180 degrees around the second platform 22, the first rotating shaft 41 only rotates 90 degrees relative to the second platform 22, therefore, the circumferential direction of the first circular ring is provided with teeth for meshing within the range of 90 degrees, the arrangement is favorable for reducing the design and processing difficulty of parts, the processing efficiency is improved, and the production cost is reduced.

Optionally, the connecting block 1 includes two fixing plates 11 and a fixing beam 12 connecting the two fixing plates 11, where the two fixing plates 11 are respectively disposed on two sides of the first platform 21 along the axial direction of the first rotating shaft 41; first toothed elements 31 are arranged on both sides of first platform 21 in the axial direction of first rotating shaft 41, and second toothed elements 32 are arranged on both sides of second platform 22 in the axial direction of second rotating shaft 42. The arrangement enables the first platform 21 and the second platform 22 to be stressed in the overturning process in a balanced manner, and the bending process is smoother.

Fig. 12 is a schematic view of the bending process of the embodiment of the present invention in which the first platform 21 and the second platform 22 are turned over simultaneously. Fig. 12 shows the motion trajectories of the first platform 21 and the second platform 22, in the process of turning over and bending the first platform 21 and the second platform 22, the first platform 21 and the second platform 22 are located on the same horizontal plane in the first state, and the linear distance between the first platform 21 and the second platform 22 is L1; in the second state, the first platform 21 and the second platform 22 are perpendicular to each other, and the distance between the first platform 21 and the second platform 22 is L2, in the third state, the first platform 21 and the second platform 22 are parallel and are both located on a vertical plane, and the linear distance between the first platform 21 and the second platform 22 is L3, as can be seen from the figure, in the whole overturning process, the linear distance between the first platform 21 and the second platform 22 is gradually reduced, that is, pi R is L1 > L2 > L3; in the unfolded state (i.e., the first state in fig. 12), the length of the display module 100 between the first platform 21 and the second platform 22 is L1, and in the rotating process (the second state and the third state in fig. 12), the chord length of the arc formed by the display module 100 between the first platform 21 and the second platform 22 is always smaller than L1, so that the first platform 21 and the second platform 22 do not pull the display module 100, and the safety of the display module 100 is ensured.

Fig. 13 is a schematic view of the bending process of the first platform 21 turning over relative to the second platform 22 in the embodiment of the present invention. Fig. 13 shows the movement tracks of the first platform 21 and the second platform 22, in the process of the first platform 21 being turned over relative to the second platform 22, in the first state, the first platform 21 and the second platform 22 are located on the same horizontal plane, and the linear distance between the first platform 21 and the second platform 22 is L1; in the second state, the first platform 21 and the second platform 22 are perpendicular to each other, and the linear distance between the first platform 21 and the second platform 22 is L2, and in the third state, the first platform 21 and the second platform 22 are parallel to each other and above the second platform 22, and the linear distance between the first platform 21 and the second platform 22 is L3, as can be seen from the figure, in the whole overturning process, the linear distance between the first platform 21 and the second platform 22 is gradually reduced, that is, pi R is L1 > L2 > L3; in the non-folded state (i.e., the first state in fig. 13), the length of the display module 100 between the first platform 21 and the second platform 22 is L1, and in the rotating process (the second state and the third state in fig. 12), the arc formed by the display module 100 between the first platform 21 and the second platform 22 is always tangent to the first platform 21 and the second platform 22, and the length of the arc is always equal to or close to rr, so that the first platform 21 and the second platform 22 do not pull the display module 100, and the safety of the display module 100 is ensured.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A display module bending test tool is characterized by comprising at least two platforms which are sequentially connected, wherein every two adjacent platforms are connected in a turnover mode through a turnover assembly;

the overturning assembly comprises a connecting block (1), a first tooth-shaped member (31) and a second tooth-shaped member (32), wherein the first tooth-shaped member (31) is rotationally connected with the connecting block (1) through a first rotating shaft (41), and the second tooth-shaped member (32) is rotationally connected with the connecting block (1) through a second rotating shaft (42); the first tooth-shaped part (31) is fixedly connected with one of the two adjacent platforms, the second tooth-shaped part (32) is fixedly connected with the other of the two adjacent platforms, and the first tooth-shaped part (31) is meshed with the second tooth-shaped part (32) so as to enable the two adjacent platforms to be overturned; each platform is used for fixing a display module (100), wherein each two adjacent platforms can be turned over at 0-180 degrees or-180-0 degrees.

2. The display module bending test tool according to claim 1, wherein one of two adjacent platforms is a movable platform, the other platform is a fixed platform, the movable platform can rotate relative to the fixed platform, the first toothed element (31) is fixed to the movable platform, and the second toothed element (32) is fixed to the fixed platform; during the overturning, the first tooth-shaped part (31) is in meshing transmission with the second tooth-shaped part (32), and the first tooth-shaped part (31) can rotate around the periphery of the second tooth-shaped part (32).

3. The display module bending test tool according to claim 2, further comprising a driving mechanism (81) and a turnover connecting rod (51), wherein the turnover connecting rod (51) is slidably connected with the movable platform, the driving mechanism (81) can drive the turnover connecting rod (51) to rotate, and the turnover connecting rod (51) can drive the movable platform to turn over; during the overturning process, the movable platform and the overturning connecting rod (51) can slide relatively.

4. The display module bending test tool according to any one of claims 1 to 3, wherein the number of the platforms is two, and the two platforms are respectively a first platform (21) and a second platform (22), the first platform (21) is fixedly connected with the first toothed member (31), and the second platform (22) is fixedly connected with the second toothed member (32).

5. The display module bending test tool according to claim 4, wherein when the display module (100) is folded inwards, the distance between the first platform (21) and the second platform (22) is pi R1, the first platform (21) and the second platform (22) can be turned over between 0 and 180 degrees, and R1 is half of the distance between two ends of the display module (100) when the first platform (21) and the second platform (22) are bent 180 degrees from a flat state.

6. The display module bending test tool according to claim 4, wherein when the display module (100) is folded outwards, the distance between the first platform (21) and the second platform (22) is pi R2, the first platform (21) and the second platform (22) can be turned over between-180 degrees and 0 degrees, and R2 is half of the distance between two ends of the display module (100) when the first platform (21) and the second platform (22) are bent from a flat state to-180 degrees.

7. The display module bending test tool according to claim 3, wherein the number of the platforms is three, and the three platforms are respectively a first platform (21), a second platform (22) and a third platform (23) which are connected in turn in a turnover manner; the first platform (21) is fixedly connected with one first tooth-shaped part (31), two ends of the second platform (22) are fixedly connected with the two second tooth-shaped parts (32) in a one-to-one correspondence mode, and the third platform (23) is fixedly connected with the other first tooth-shaped part (31).

8. The display module bending test tool according to claim 7, wherein the first platform (21) and the third platform (23) are both movable platforms, the second platform (22) is a fixed platform, and the first platform (21) and the third platform (23) can rotate relative to the second platform (22).

9. The display module bending test tool according to claim 1, wherein the distance between the first rotating shaft (41) and the second rotating shaft (42) on the connecting block (1) is adjustable.

10. The display module bending test tool according to claim 1, wherein the first tooth-shaped member (31) and the second tooth-shaped member (32) comprise a connecting rod and a circular ring arranged at one end of the connecting rod, and a plurality of teeth are arranged on the circumferential part of the circular ring at intervals; the connecting rod is used for being connected with the platform fixed connection that corresponds, the hole of ring be used for with correspond first pivot (41) or second pivot (42) are connected.