CN113624463A

CN113624463A - Jig and method for testing optimal rotation track of folding screen

Info

Publication number: CN113624463A
Application number: CN202110929432.0A
Authority: CN
Inventors: 青威; 王志会; 张磊; 莫文蔚
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-11-09
Anticipated expiration: 2041-08-13
Also published as: CN113624463B

Abstract

The invention discloses a jig and a method for testing an optimal rotation track of a folding screen, and relates to the technical field of display, so that the optimal rotation track of the folding screen is determined, and the fatigue failure risk of the folding screen is reduced. The jig comprises a middle supporting strip, two supporting assemblies and at least one group of rotating shaft assemblies, wherein the middle supporting strip extends along a first direction and is provided with an axis along the first direction; the two support assemblies are symmetrically arranged relative to the axis of the middle support bar; the support assembly comprises a support plate and a sliding plate, the support plate can slide along a second direction relative to the sliding plate, and the second direction is perpendicular to the first direction; the group of rotating shaft assemblies comprises two rotating shaft assemblies which are symmetrically arranged relative to the axis of the middle supporting bar, the two rotating shaft assemblies which are symmetrically arranged can be close to each other or far away from each other, and the supporting assemblies can rotate around the rotating shaft assemblies within a preset angle range. The invention is used for testing the optimal rotation track of the folding screen.

Description

Jig and method for testing optimal rotation track of folding screen

Technical Field

The disclosure relates to the technical field of display, in particular to a jig and a method for testing an optimal rotation track of a folding screen.

Background

With the development of flexible Organic Light Emitting Diode (OLED), the display device has become more and more abundant. Among them, the foldable display device is a symbol of the development ability of various manufacturers.

However, after the foldable display device is used for a long time, the foldable screen of the foldable display device is easy to crack or break at the rotating position, the risk of fatigue failure is high, the service life is short, and the reliability is low.

Disclosure of Invention

The invention provides a jig and a method for testing an optimal rotation track of a folding screen, which are used for determining the optimal rotation track of the folding screen, so that the fatigue failure risk of the folding screen is reduced, the service life is prolonged, and the reliability is improved.

In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:

on the one hand, a jig for testing the optimal rotation track of the folding screen is provided. The jig for testing the optimal rotating track of the folding screen comprises a middle supporting bar, two supporting assemblies and at least one group of rotating shaft assemblies.

The medial support bar extends in a first direction, the medial support bar having an axis in the first direction. A first surface of the medial support strip is configured to mount a folding screen, the first surface of the medial support strip being one of two opposing major surfaces of the medial support strip.

The two support assemblies are symmetrically arranged relative to the axis of the medial support bar. The support assembly includes a support plate and a sliding plate, a first surface of the support plate being configured to mount a folding screen; the first surface of the support plate is one of two opposing major surfaces of the support plate. The sliding plate is arranged on the second surface of the supporting plate, and the second surface of the supporting plate is the other of the two opposite main surfaces of the supporting plate; the support plate is slidably coupled to the slide plate, and the support plate is slidable relative to the slide plate in a second direction perpendicular to the first direction.

A set of rotation axis subassembly includes for two rotation axis subassemblies that the axis symmetry of medial support strip set up, and two rotation axis subassemblies that the symmetry set up can be close to each other or keep away from each other, and can be in predetermineeing the distance respectively with medial support strip is connected. The support component can rotate around the rotating shaft component within a preset angle range.

In some embodiments, the medial support bar is provided with a first mounting hole. The rotating shaft assembly comprises a connecting piece, a first fixing piece and a first rotating shaft.

The connecting piece comprises a first connecting part and a second connecting part, the first connecting part is arranged on the second surface of the middle supporting strip, and the second surface of the middle supporting strip is the other of the two opposite main surfaces of the middle supporting strip; the first connecting portion is provided with a first connecting via hole penetrating through the first connecting portion along the third direction, and the first connecting via hole extends along the second direction so that the rotating shaft assembly can move along the second direction within the preset distance; the third direction is perpendicular to the first direction and the second direction. The second connecting portion are equipped with and follow the first direction runs through the first shaft hole of second connecting portion, first shaft hole set up in the one side that is configured into the installation folding screen of medial support strip.

The first fixing piece penetrates through the first connecting through hole to be connected with the first mounting hole. The first rotating shaft is arranged in the first shaft hole and extends out of the first shaft hole.

In some embodiments, the jig further comprises a first adjusting piece, wherein the first adjusting piece is arranged on the second surface of the middle supporting bar and is connected with the middle supporting bar; the first adjustment member is configured to define a distance between the symmetrically disposed rotating shaft assemblies.

In some embodiments, the first connecting portion is further provided with a guide hole penetrating the first connecting portion in the second direction. The first adjusting part comprises a fixing block and a guide rod, the fixing block is connected with the middle supporting bar, and the first connecting portion of the rotation shaft assembly symmetrically arranged abuts against the middle supporting bar to limit the distance between the rotation shaft assemblies symmetrically arranged. The guide rod penetrates through the fixed block along the second direction and is connected with the fixed block; the guide rod extends into the guide hole, and the first connecting portion can slide along the guide rod.

In some embodiments, the jig further comprises a second adjusting piece, wherein the second adjusting piece is arranged between the middle supporting bar and the first connecting portion and is connected with the middle supporting bar; the second adjusting member is configured to adjust a distance between the medial support bar and the first rotation shaft.

In some embodiments, the support assembly further comprises a slide bar connected with the slide plate. The jig further comprises a supporting piece, a synchronous gear and a gear shaft.

The supporting piece is connected with the middle supporting bar. Follow the axis of medial support strip, the support piece symmetry is provided with first shaft hole and first spout, first pivot stretches into in the first spout, first spout is followed the second direction extends, so that the rotation axis subassembly can be in follow in the predetermined distance the second direction removes.

The synchronizing gears are symmetrically arranged relative to the axis of the middle supporting bar, and the gear teeth of the symmetrically arranged synchronizing gears are meshed. Synchronous gear includes gear portion and third connecting portion, the center of gear portion is equipped with the gear hole, the circumference of gear portion is close to at least partial border of the axis of medial support strip is equipped with gear tooth. The third connecting part is provided with a second sliding groove, and the sliding rod extends into the second sliding groove so that the synchronous gear can synchronously rotate along with the supporting component; the second sliding groove extends along the second direction, so that the supporting component can move along the second direction along with the rotating shaft component within the preset distance. One end of the gear shaft is connected with the first shaft hole, and the other end of the gear shaft is connected with the gear hole.

In some embodiments, the support assembly further comprises a slide rail and a slider, the slide rail extending along the second direction. The slider is fixed to one of the sliding plate and the support plate; the slider is fixed to the other of the sliding plate and the support plate, and the slider is slidable along the slide rail.

In some embodiments, two limiting protrusions are disposed on a first boundary of the supporting plate, and the first boundary is a boundary of the supporting plate parallel to the second direction. The sliding plate is provided with a slide way and a second mounting hole, the slide way penetrates through the sliding plate, and the slide way extends along the second direction.

The support assembly further comprises a sliding limiting block and a fixing limiting block, wherein the sliding limiting block is arranged in the slide way and can slide relative to the sliding plate along with the support plate. The fixed limiting block is arranged at one end of the slideway and is connected with the second mounting hole; the slide stopper is in the slide is kept away from when the one end of fixed stopper, the slide stopper with fixed stopper respectively with the lateral wall that two spacing archs are close to each other supports and leans on.

In some embodiments, the support assembly further comprises a carbon fiber plate disposed on the first surface of the support plate.

In some embodiments, one of the two sliding plates symmetrically disposed along the axis of the medial support bar is provided with a third mounting hole. The jig further comprises an angle identification piece, a rotation identification piece and a limiting piece.

The angle identification piece comprises a rotation guide portion, a fourth connecting portion and a second fixing piece, the rotation guide portion is provided with an arc-shaped slide way, and the edge of the arc-shaped slide way is provided with an angle identification. The fourth connecting portion is provided with a second connecting through hole, and the second connecting through hole extends in the second direction, so that the angle identification piece can move in the second direction within the preset distance. The second fixing piece penetrates through the second connecting through hole to be connected with the third mounting hole.

The rotating identification piece comprises a fifth connecting part and an identification sliding block, and the fifth connecting part is attached to the surface, deviating from the corresponding supporting plate, of the sliding plate which is not provided with the third mounting hole. The identification sliding block is arranged on the fifth connecting part; the identification sliding block extends into the arc-shaped slide way, and can slide along the arc-shaped slide way.

The limiting piece is connected with the identification sliding block on one side, far away from the fifth connecting portion, of the identification sliding block so as to prevent the angle identification piece from moving along the first direction relative to the rotation identification piece.

In some embodiments, the jig further comprises a base comprising a base plate, a first connecting plate, and a second connecting plate, the base plate configured to be placed on a work plane; the first connecting plate is connected with one of the two sliding plates symmetrically arranged along the axis of the middle supporting bar, and the second connecting plate is connected with the other sliding plate symmetrically arranged along the axis of the middle supporting bar; the first and second connecting plates are separate and configured to support corresponding sliding plates.

In some embodiments, the jig further comprises an angle positioning member, and the angle positioning member is rotatably connected with the bottom plate. The angle positioning piece can rotate between an original position and a working position and can be fixed at the working position; the original position is a position where the angle positioning piece is separated from the synchronous gear, and the working position is a position where the angle positioning piece is attached to the synchronous gear.

In some embodiments, the bottom plate is provided with an escape opening, and an orthographic projection of the gear portion of the synchronizing gear on the bottom plate is located in the escape opening. The angle positioning piece comprises a supporting lug, a second rotating shaft, a warping plate, a pressing plate and a limiting piece.

The support ears are arranged on two sides of the avoiding opening and connected with the bottom plate; and a second shaft hole is formed in the supporting lug. The second rotating shaft extends into the second shaft hole and is connected with the supporting lug. The wane includes spacing portion, rotation portion and presses the splenium, rotation portion set up in press the splenium to keep away from one side of bottom plate, rotation portion with the second pivot is rotated and is connected. In the working position, the pressing part is attached to the bottom plate, and the limiting part is attached to the synchronous gear to prevent the synchronous gear from rotating; in the initial position, the pressing portion is separated from the bottom plate, the limiting portion is separated from the synchronizing gear, and the synchronizing gear can rotate. The pressing plate is provided with a sliding groove, and the sliding groove extends along the second direction. The limiting part extends into the sliding groove, and the pressing plate can move along the extending direction of the sliding groove, so that the pressing part is pressed on the bottom plate or is separated from the bottom plate.

In some embodiments, the jig further comprises a pressure bar fixing piece and a hollow pressure bar, wherein the pressure bar fixing piece is connected with the middle supporting bar; the pressing rod fixing piece is provided with a slot. The hollow pressing rod is inserted into the slot so as to press the part of the folding screen above the middle supporting strip.

According to the jig for testing the optimal rotating track of the folding screen, provided by the embodiment of the disclosure, the supporting component can rotate around the rotating shaft component, and the position of the rotating shaft component can be adjusted within a preset distance in the second direction. That is, the rotation center of the support assembly may be adjusted within a preset distance in the second direction. Further, the first surface of the support plate in the support assembly is configured to mount a folding screen, the support plate being slidable in a second direction relative to the sliding plate. That is, the support plate rotates together with the slide plate about the rotational axis assembly, and during the rotation, the support plate is slidable in the second direction with respect to the slide plate under other external forces (e.g., tensile and compressive stresses of the folding screen).

Based on this, when the folding screen is installed on the supporting plate, the rotation center of the folding screen is the rotation center of the supporting component, namely, the position of the rotation center of the folding screen can be changed along with the change of the position of the rotating shaft component. In this case, the target position of the rotating shaft assembly may be adjusted multiple times, and the two support plates may be rotated multiple times for each position of the rotating shaft assembly such that the included angle between the two support plates forms multiple preset rotation angles. At each preset rotation angle, the folding screen is made to freely slide to a relaxed state free from tensile and compressive stress, i.e. the support plate is made to freely slide in the second direction relative to the sliding plate under the action of the tensile and compressive stress of the folding screen to a position in the relaxed state free from tensile and compressive stress of the folding screen. At the moment, recording each preset rotation angle and the corresponding sliding amount of the folding screen; according to the sliding amount of the folding screen corresponding to the preset rotation angles of the rotating shaft assembly at each target position, the optimal position of the rotating shaft assembly is determined, and the optimal rotation track of the folding screen is obtained, so that the fatigue failure risk of the folding screen is reduced, the service life is prolonged, and the reliability is improved.

On the other hand, a method for testing the optimal rotation track of the folding screen is also provided, and is applied to the jig in any one of the embodiments, and the method comprises the following steps: adjusting the target position of a rotating shaft assembly in the jig for multiple times, and fixing the folding screen on a supporting plate of the jig; aiming at each target position of the rotating shaft assembly, rotating the two supporting plates for multiple times to enable an included angle between the two supporting plates to form multiple preset rotating angles; at each preset rotation angle, the folding screen is enabled to freely slide to a relaxation state free from tensile and compressive stress; recording each preset rotation angle and the corresponding sliding amount of the folding screen; and determining the optimal position of the rotating shaft assembly according to the sliding amount of the folded screen corresponding to the preset rotating angles of the rotating shaft assembly at each target position, so as to obtain the optimal rotating track of the folded screen.

The method for testing the optimal rotation track of the folding screen provided by the embodiment of the disclosure has the same beneficial effects as the jig for testing the optimal rotation track of the folding screen provided by the technical scheme, and is not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a three-dimensional block diagram of a fixture for testing an optimal rotational trajectory of a folding screen according to some embodiments;

FIG. 2 is a front view of a fixture for testing an optimal rotational trajectory of a folding screen according to some embodiments;

FIG. 3 is a rear view of a fixture for testing an optimal rotational trajectory of a foldable screen according to some embodiments;

FIG. 4 is an enlarged view of a fixture for testing an optimal rotational trajectory of a folded screen at a rotating shaft assembly according to some embodiments;

FIG. 5 is a block diagram of a support plate of a fixture for testing an optimal rotational trajectory of a foldable screen according to some embodiments;

FIG. 6 is a block diagram of a slide plate of a fixture for testing an optimal rotational trajectory of a folding screen according to some embodiments;

FIG. 7 is an enlarged view of a fixture for testing an optimal rotational trajectory of a folded screen at a synchronizing gear according to some embodiments;

FIG. 8 is an enlarged view of a fixture for testing an optimal rotational trajectory of a folding screen at a synchronizing gear and a support according to some embodiments;

fig. 9 is a structural diagram of an angle identifier, a rotation identifier, and a stopper of a fixture for testing an optimal rotation trajectory of a folding screen according to some embodiments;

FIG. 10 is an enlarged view of an angular positioning element of a fixture for testing an optimal rotation trajectory of a foldable screen according to some embodiments;

FIG. 11 is a flow chart of a method of testing an optimal rotational trajectory of a folding screen according to some embodiments.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "some embodiments(s)", "example(s)", or "some example(s)", etc. are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment(s) or example(s) is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, the expression "connected" and its derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing.

As used herein, "parallel," "perpendicular," and "equal" include the stated case and cases that approximate the stated case to within an acceptable range of deviation as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where an acceptable deviation from approximately parallel may be, for example, within 5 °; "perpendicular" includes absolute perpendicular and approximately perpendicular, where an acceptable deviation from approximately perpendicular may also be within 5 °, for example. "equal" includes absolute and approximate equality, where the difference between the two, which may be equal within an acceptable deviation of approximately equal, is less than or equal to 5% of either.

At present, the foldable display device can be any product or component with a display function, such as a television, a display, a notebook computer, a tablet computer, a mobile phone, a navigator and the like. The foldable display device needs to meet the mechanical performance reliability under the folding condition, and when the display module of the foldable display device is folded through the rotating shaft, the display module cannot be damaged or peeled off by a rubber material.

Based on this, determining the position of the optimal center of rotation of the foldable display device is one of the main problems faced by the design of foldable display devices.

Referring to fig. 1, some embodiments of the present disclosure provide a jig 100 for testing an optimal rotation trajectory of a folding screen, including a medial support bar 10, two support assemblies 20, and at least one set of rotating shaft assemblies 30.

As shown in fig. 2, 3 and 4, the medial support bar 10 extends in a first direction X, the medial support bar 10 having an axis L in the first direction X. Wherein the medial support strip 10 has two opposing major surfaces, a first surface 101 and a second surface 102, respectively, of the medial support strip 10. It should be noted that the first surface 101 of medial support bar 10 is configured to receive a folding screen and the second surface 102 of medial support bar 10 is the surface opposite the first surface 101 of medial support bar 10.

As shown in fig. 2 and 3, the two support assemblies 20 are symmetrically disposed with respect to the axis L of the medial support bar 10. The support assembly 20 includes a support plate 21 and a sliding plate 22.

Referring to fig. 5, the support plate 21 has two opposite major surfaces, which are a first surface 210 and a second surface 211 of the support plate 21, respectively. Note that the first surface 210 of the support plate 21 is configured to mount a folding screen, and the second surface 211 of the support plate 21 is a surface opposite to the first surface 210 of the support plate 21.

Referring to fig. 3 and 6, the sliding plate 22 is disposed on the second surface 211 of the support plate 21. The support plate 21 is slidably connected to the sliding plate 22, and the support plate 21 is slidable relative to the sliding plate 22 along a second direction Y, which is perpendicular to the first direction X.

It should be noted that a plurality of hollowed-out areas may be disposed on the sliding plate 22 to reduce the weight and the cost.

Referring to fig. 4 and 7, the set of rotating shaft assemblies 30 includes two rotating shaft assemblies 30 symmetrically disposed with respect to the axis L of the medial support bar 10, and the two rotating shaft assemblies 30 symmetrically disposed may be close to or distant from each other and may be respectively coupled to the medial support bar 10 within a predetermined distance. Wherein the support assembly 20 is rotatable around the rotation axis assembly 30 within a predetermined angle range.

It should be noted that the preset distance is set according to actual conditions, so as to ensure that the folding screen mounted on the support assembly 20 can freely slide to a relaxed state without tensile and compressive stresses when the support assembly 20 rotates to any angle.

The preset angle range is set according to actual conditions. Generally, the position where the two support assemblies 20 are parallel to the medial support bar 10 is the initial position, i.e., 0 °, and the two support assemblies 20 are both rotatable about the rotation shaft assembly 30 toward the axis L of the medial support bar 10 until the two support assemblies 20 are perpendicular, i.e., 90 °, to the medial support bar 10. That is, the preset angle ranges from 0 ° to 90 °.

In the jig 100 for testing the optimal rotation trajectory of the foldable screen provided by some embodiments of the present disclosure, the support assembly 20 may rotate around the rotation axis assembly 30, and the position of the rotation axis assembly 30 may be adjusted within a preset distance in the second direction Y. That is, the rotation center of the support member 20 may be adjusted within a preset distance in the second direction Y.

Further, the first surface 210 of the support plate 21 in the support assembly 20 is configured to mount a folding screen, and the support plate 21 is slidable in the second direction Y with respect to the sliding plate 22. That is, the support plate 21 rotates together with the sliding plate 22 about the rotation shaft assembly 30, and during the rotation, the support plate 21 is slidable in the second direction Y with respect to the sliding plate 22 under other external forces (e.g., tensile and compressive stresses of the folding screen).

Based on this, when the folding screen is mounted on the support plate 21, the center of rotation of the folding screen is the center of rotation of the support assembly 20, that is, the position of the center of rotation of the folding screen may be changed with the change of the position of the rotation shaft assembly 30. In this case, the target position of the rotating shaft assembly 30 may be adjusted multiple times, and the two support plates 21 may be rotated multiple times for each target position of the rotating shaft assembly 30 such that the included angle between the two support plates 21 forms multiple preset rotation angles. At each preset rotation angle, the folding screen is made to freely slide to a relaxed state free from tensile and compressive stresses, i.e. the support plate 21 is made to freely slide in the second direction Y with respect to the sliding plate 22 under the tensile and compressive stresses of the folding screen to a position in which the folding screen is made to be in a relaxed state free from tensile and compressive stresses. At the moment, recording each preset rotation angle and the corresponding sliding amount of the folding screen; according to the sliding amount of the folding screen corresponding to the preset rotation angles of the rotating shaft assembly 30 at each target position, the optimal position of the rotating shaft assembly 30 is determined, and the optimal rotation track of the folding screen is obtained, so that the fatigue failure risk of the folding screen is reduced, the service life is prolonged, and the reliability is improved.

Referring to fig. 1, in some embodiments, the support assembly 20 further includes a carbon fiber plate 28, the carbon fiber plate 28 being disposed on the first surface of the support plate 21. Illustratively, the carbon fiber plate 28 is connected to the support plate 21 by screwing. Like this, the folding screen can directly paste on carbon fiber plate 28 to after changing the folding screen, can change new carbon fiber plate 28, guarantee measuring accuracy, and the cost is lower.

Referring to fig. 1 and 4, in some embodiments, the jig 100 includes two sets of two rotating shaft assemblies 30 symmetrically disposed with respect to the axis L of the medial support bar 10. Along first direction X, two sets of rotating shaft assembly 30 symmetry set up in the both ends of medial branch strip 10 to the both ends that make every supporting component 20 all rotate with the rotating shaft assembly 30 that corresponds and are connected, make supporting component 20's rotation process more steady smooth and easy.

Referring to fig. 4, in some embodiments, the medial support bar 10 is provided with a first mounting hole. The rotating shaft assembly 30 includes a connecting member 31, a first fixing member 32, and a first rotating shaft 33.

Referring to fig. 1 and 4, the connecting member 31 includes a first connecting portion 311 and a second connecting portion 312, and the first connecting portion 311 is disposed on the second surface 102 of the medial support bar 10. The first connection portion 311 is provided with a first connection via hole penetrating through the first connection portion 311 along the third direction Z, and the first connection via hole extends along the second direction Y, so that the rotation shaft assembly 30 can move along the second direction Y within a preset distance; the third direction Z is perpendicular to the first direction X and the second direction Y.

Referring to fig. 4, the first fixing member 32 passes through the first connecting through hole to be connected with the first mounting hole of the medial support bar 10. Illustratively, the first fixing member 32 is a screw, the first mounting hole is a threaded hole, and the screw passes through the first connecting through hole to be tightly connected with the threaded hole, so that the connecting member 31 is fixed with the medial support bar 10.

When the position of the rotating shaft assembly 30 needs to be adjusted, first, the first fixing member 32 is separated from the first mounting hole; then, the link 31 is moved in the second direction Y; finally, when the connecting member 31 is moved to the target position, the first fixing member 32 passes through the first connecting through hole and is fixed to the first mounting hole, so that the rotating shaft assembly 30 is fixed to the target position.

Referring to fig. 4, the second connecting portion 312 is provided with a first shaft hole penetrating the second connecting portion 312 along the first direction X, the first shaft hole being provided at a side of the medial support bar 10 configured to mount the folding screen. The first shaft 33 is disposed in the first shaft hole and extends out of the first shaft hole.

At this time, referring to fig. 4 and 7, each support plate 21 rotates around the first rotating shaft 33 of the corresponding rotating shaft assembly 30, i.e., the first rotating shaft 33 of each rotating shaft assembly 30 is the rotating center of the corresponding support plate 21, i.e., the rotating center of the folding screen on the support plate 21.

Referring to fig. 1 and 4, in some embodiments, the jig 100 further includes a first adjusting member 40, the first adjusting member 40 is disposed on the second surface 102 of the medial support bar 10 and connected to the medial support bar 102; the first adjustment member 40 is configured to define a distance between the symmetrically disposed rotating shaft assemblies 30.

Illustratively, the first adjusting member 40 is a rectangular parallelepiped, and opposite side surfaces of the rectangle abut against the first connecting portions 311 of the two symmetrically disposed rotating shaft assemblies 30, respectively, to define a distance between the symmetrically disposed rotating shaft assemblies 30.

It should be noted that, a plurality of first adjusting members 40 with different sizes may be designed according to a plurality of target positions between two symmetrically arranged rotating shaft assemblies 30, and the rotating shaft assemblies 30 with different target positions are defined by the first adjusting members 40 with different sizes.

As can be seen from the above, when the distance between the symmetrically arranged rotating shaft assemblies 30 is adjusted, the distance between the two rotating shaft assemblies 30 can be limited by the first adjusting member 40, and then the rotating shaft assemblies 30 are fixedly connected with the medial support bar 10, which is convenient for operation.

Referring to fig. 4, in some embodiments, the first connection portion 311 is further provided with a guide hole penetrating the first connection portion 311 in the second direction Y.

Referring to fig. 4, the first adjusting member 40 includes a fixing block 41 and a guide rod 42, and the fixing block 41 is connected to the medial support bar 10 and abuts against the first connecting portions 311 of the symmetrically arranged rotating shaft assemblies 30 to define a distance between the symmetrically arranged rotating shaft assemblies 30. Here, the fixing block 41 may be a rectangular parallelepiped as mentioned above, and the disclosure is not limited thereto.

Referring to fig. 4, the guide rod 42 penetrates the fixing block 41 in the second direction Y and is connected to the fixing block 41. The guide rod 42 extends into the guide hole, and the first connection portion 311 can slide along the guide rod 42.

In this case, the link 31 may slide along the guide bar 42 to allow the rotation shaft assembly 30 to reach a target position and provide a preliminary limit to the link 31, for example, to prevent the link 31 from moving toward or away from the medial support bar 10, which not only facilitates the movement of the rotation shaft assembly 30 to the target position, but also facilitates the subsequent fixing of the link 31 to the medial support bar 10.

Referring to fig. 4, in some embodiments, the jig 100 further includes a second adjusting member 50, the second adjusting member 50 is disposed between the medial support bar 10 and the first connecting portion 311, and is connected to the medial support bar 10; the second adjustment member 50 is configured to adjust the distance between the medial support bar 10 and the first rotation axis 33 to determine the distance between the first rotation axis 33 and the folding screen.

It should be noted that, a plurality of second adjusting members 50 with different sizes may be designed according to a plurality of target positions of the rotating shaft assembly 30, and the second adjusting members 50 with different sizes may be adopted for adjustment of the rotating shaft assembly 30 with different target positions.

Referring to fig. 1 and 7, in some embodiments, the support assembly 20 further includes a slide bar 23, the slide bar 23 being coupled to the slide plate 22. The jig 100 further includes a support 60, a synchronizing gear 70, and a gear shaft 80.

It should be noted that, for convenience of manufacture, the sliding plate 22 of the support assembly 20 includes a support portion 221 and a rotation connection portion 222, the rotation connection portion 222 is provided with an avoiding hole and a central hole, and the sliding rod 23 is fixed on the support portion 221 and passes through the avoiding hole. The first rotation shaft 33 passes through the center hole so that the support assembly 20 can rotate about the first rotation shaft 33 (see fig. 4).

Referring to fig. 1, 7 and 8, the support member 60 is connected with the medial support bar 10. Along the axis L of the medial support bar 10, the support member 60 is symmetrically provided with a first shaft hole 61 and a first sliding groove 62, and the first rotating shaft 33 extends into the first sliding groove 62, so that the two ends of the first rotating shaft 33 are supported by other components, and the stability of the first rotating shaft 33 is improved. The first sliding slot 62 extends along the second direction Y, so that the rotating shaft assembly 30 can move along the second direction Y within a preset distance, that is, the first rotating shaft 33 of the rotating shaft assembly 30 can move along the second direction Y within the preset distance.

It should be noted that, in the case that the jig 100 includes the first adjusting member 40, the supporting member 60 is directly fixed to the first adjusting member 40, that is, the first adjusting member 40 is connected to the medial support bar 10, so as to facilitate manufacturing. In addition, the first shaft hole 61 and the first sliding groove 62 can be communicated, and the sizes of the first shaft hole and the first sliding groove are not consistent, so that the size of the supporting piece 60 can be made smaller, and the occupied space is reduced.

Referring to fig. 1 and 7, the synchronizing gear 70 is symmetrically disposed with respect to the axis L of the medial support bar 10, the synchronizing gear 70 includes a gear portion 71 and a third connecting portion 72, the third connecting portion 72 is provided with a second sliding slot 720, and the sliding rod 23 extends into the second sliding slot 720, so that the synchronizing gear 70 can synchronously rotate with the corresponding support assembly 20. Wherein, the second sliding slot 720 extends along the second direction Y, so that the supporting component 20 can move along the second direction Y within a preset distance along with the rotating shaft component 30.

In addition, the gear portion 71 is centrally provided with a gear hole 710 (see fig. 10), at least a portion of the periphery of the gear portion 71 near the axis L of the medial support bar 10 is provided with gear teeth 711, and the gear teeth 711 of the symmetrically arranged synchronizing gears 70 are engaged to synchronize the rotation of the symmetrically arranged support assemblies 20.

Illustratively, the gear portion 71 is provided with a gear tooth 711 at a boundary corresponding to a central angle of about 90 ° so that the corresponding support assembly 20 rotates in a range of 0 ° to 90 °.

Referring to fig. 7 and 8, one end of the gear shaft 80 is connected to the first shaft hole 61 and the other end is connected to the gear hole 710 (see fig. 10) so that the synchronizing gear 70 is rotatable with respect to the gear shaft 80 or the synchronizing gear 70 and the gear shaft 80 are rotatable with respect to the first shaft hole 61.

Referring to fig. 1, 5 and 6, in some embodiments, the support assembly 20 further includes a slide rail 24 and a slider 25, the slide rail 24 extending in the second direction Y. The slider 25 is fixed to one of the slide plate 22 and the support plate 21; a slide rail 24 is fixed to the other of the slide plate 22 and the support plate 21, and a slider 25 is slidable along the slide rail 24. For example, the slider 25 is fixed to the support plate 21, and the slide rail 24 is fixed to the slide plate 22.

Illustratively, the slide rail 24 is approximately "U" shaped in cross section along the first direction X, the top end of the "U" shape having an insert plate facing the inside of the "U" shape; the slider 25 is shaped approximately in the shape of an i in a cross section taken along the first direction X. The depressions on the two sides of the I shape are matched with the insertion plate at the top end of the U shape, at least part of the bottom of the I shape is abutted against at least part of the bottom of the U shape, so that the sliding rail 24 and the sliding block 25 can only slide along the second direction Y, the sliding process of the sliding rail 24 and the sliding block 25 is very stable, and relative shaking is not easy to generate between the sliding rail 24 and the sliding block 25.

In order to enhance the connection reliability between the slider 25 and the support plate 21, referring to fig. 5, the support plate 21 protrudes toward the sliding plate 22 to form a reinforcement portion 214, the slider 25 is engaged with the reinforcement portion 214, and then the slider is fixedly connected by screws, so that the operation is facilitated and the connection reliability is high.

Referring to fig. 5, in some embodiments, two limiting protrusions 213 are disposed on the first boundary 212 of the supporting plate 21, and the first boundary 212 is a boundary of the supporting plate 21 parallel to the second direction Y.

Referring to fig. 6 and 7, the sliding plate 22 is provided with a sliding track 223 penetrating through the sliding plate 22 and a second mounting hole, and the sliding track 223 extends along the second direction Y. The support assembly 20 further includes a sliding stopper 26 and a fixed stopper 27, the sliding stopper 26 is disposed in the slide track 223 and can slide with the support plate 21 relative to the sliding plate 22. Wherein, the fixed stopper 27 is disposed at one end of the slide track 223 and connected to the second mounting hole to be fixed on the sliding plate 22. When the slide rail 223 is away from one end of the fixed stopper 27, the slide stopper 26 and the fixed stopper 27 are respectively in contact with the side walls of the two stopper protrusions 213 that are close to each other.

In this case, the relative sliding amount between the support plate 21 and the sliding plate 22 can be converted into the distance moved by the sliding stopper 26, which is convenient for measurement.

Referring to fig. 1, in some embodiments, one of the two sliding plates 22 symmetrically disposed along the axis L of the medial support bar 10 is provided with a third mounting hole. The jig 100 further includes an angle indicator 91, a rotation indicator 92, and a stopper 93.

It should be noted that, when the jig 100 includes the base 11 mentioned below, the third mounting hole may be provided on the first connecting plate 120 of the base 11.

Referring to fig. 1 and 9, the angle indicator 91 includes a rotation guide portion 910, a fourth connection portion 911, and a second fixing member, the rotation guide portion 910 is provided with an arc-shaped slideway 9100, and an edge of the arc-shaped slideway 9100 is provided with an angle indicator. The fourth connecting portion 911 is provided with a second connecting via 9111, and the second connecting via 9111 extends along the second direction Y, so that the angle indicator 91 can move along the second direction Y within a preset distance, i.e., the sliding plate 22 is ensured not to affect the position of the angle indicator 91 when adjusting the position along with the rotating shaft assembly 30. The second fixing piece passes through the second connection through hole 9111 and is connected with the third mounting hole. For example, the second fixing member is a screw, and the third mounting hole is a threaded hole.

Referring to fig. 1 and 9, the rotary identifier 92 includes a fifth connecting portion 920 and an identifier block 921, and the fifth connecting portion 920 is attached to a surface of the sliding plate 22, which is not provided with the third mounting hole, facing away from the corresponding support plate 21, so that the position of the rotary identifier 92 is not affected when the sliding plate 22 is adjusted along with the rotary shaft assembly 30. The identification slider 921 is disposed on the fifth connection portion 920; the identification slider 921 extends into the arc-shaped slideway 9100, and the identification slider 921 can slide along the arc-shaped slideway 9100.

Referring to fig. 1 and 9, the limiting member 93 is connected to the identification slider 921 at a side of the identification slider 921 away from the fifth connecting portion 920 to prevent the angle identification member 91 from moving in the first direction X relative to the rotary identification member 92. For example, the stopper 93 is a screw.

In this case, after the sliding plate 22 rotates around the first rotating shaft 33, the rotating indicator 92 is rotated along the arc-shaped sliding way 9100, so that the rotating indicator 92 abuts against the sliding plate 22, and the rotation angle of the sliding plate 22 (i.e. the rotation angle of the support assembly 20) can be obtained, which is convenient for measurement.

Referring to fig. 3, in some embodiments, the jig 100 further includes a base 11, the base 11 including a base plate 110, a first connecting plate 120 and a second connecting plate 130, the base plate 110 being configured to be placed on the work plane, the first connecting plate 120 being connected to one of the two sliding plates 22 symmetrically disposed along the axis L of the medial support bar 10, the second connecting plate 130 being connected to the other sliding plate 22 symmetrically disposed along the axis L of the medial support bar 10. The first and second connection plates 120 and 130 are separated, and the first and second connection plates 120 and 130 are configured to support the corresponding sliding plates 22. Like this, tool 100 can vertical operation, and in the rotation process, the folding screen receives the influence of gravity less, measures more accurately.

It should be noted that one of the first connecting plate 120 and the second connecting plate 130 may be connected to the bottom plate 110 (the first connecting plate 120 is connected to the bottom plate 110 in fig. 3), and the other may be connected to other external supports, which is not exemplified in the present disclosure.

Referring to fig. 1 and 10, in some embodiments, the jig 100 further includes an angle positioning member 94, and the angle positioning member 94 is rotatably connected to the bottom plate 201. The angular positioning member 94 is rotatable between a home position and an operating position and is fixable in the operating position. The original position is a position where the angle positioning element 94 is separated from the synchronizing gear 70, and the working position is a position where the angle positioning element 94 is attached to the synchronizing gear 70. Thus, after the support assembly 20 is rotated to a predetermined rotation angle, the angle positioning member 94 can be rotated to the working position to position the angle for measurement,

Referring to fig. 10, the base plate 110 is provided with an escape opening 1100, and an orthographic projection of the gear portion 71 of the synchronizing gear 70 on the base plate 110 is located in the escape opening 1100. Angular positioning member 94 includes a support ear 941, a second pivot 942, a rocker 943, a pressure plate 944, and a stop 945.

Referring to fig. 10, the support ears 941 are disposed at both sides of the avoidance opening 1100 and are connected to the base plate 110. The support ear 941 is provided with a second shaft hole. The second shaft 942 extends into the second shaft hole and is connected to the supporting lug 941.

Referring to fig. 10, the rocker 943 includes a position-limiting portion 9431, a rotating portion 9432 and a pressing portion 9433, the rotating portion 9432 is disposed on a side of the pressing portion 9433 away from the bottom plate 110, and the rotating portion 9432 is rotatably connected to the second rotating shaft 942.

In the working position, the pressing portion 9433 is engaged with the bottom plate 110, and the stopper portion 9431 is engaged with the synchronizing gear 70 to prevent the synchronizing gear 70 from rotating. In the initial position, the pressing portion 9433 is separated from the base plate 110, the stopper portion 9431 is separated from the synchronizing gear 70, and the synchronizing gear 70 can rotate.

Referring to fig. 10, the presser plate 944 is provided with slide grooves 9440, the slide grooves 9440 extending in the second direction Y. The limiting member 945 is inserted into the sliding groove 9440, and the pressing plate 944 can move along the extending direction of the sliding groove 9440, so that the pressing portion 9433 is pressed onto the bottom plate 110 or the pressing portion 9433 is separated from the bottom plate 110, thereby fixing the rocker 943 at the working position or releasing the rocker from the working position. Illustratively, the limiting member 945 includes two screws arranged side by side along the second direction Y.

Referring to fig. 1 and 4, in some embodiments, the jig 100 further includes a compression bar fixing member 12 and a hollow compression bar 13, the compression bar fixing member 12 is connected with the medial support bar 10; the press rod fixing member 12 is provided with a slot. The hollow pressing rod 13 is inserted into the slot to press the part of the folding screen above the medial support bar 10 to prevent the part of the folding screen above the medial support bar 10 from tilting. The hollow strut 13 is, for example, a cylindrical hollow strut 13.

Some embodiments of the present disclosure further provide a method for testing an optimal rotation trajectory of a foldable screen, which is applied to the jig 100 of any of the above embodiments, with reference to fig. 11, the method includes S1 to S5.

S1: the target position of the rotating shaft assembly 30 in the jig 100 is adjusted many times, and the folding screen is fixed on the supporting plate 21 of the jig 100.

In the above steps, adjusting the target position of the rotating shaft assembly 30 in the jig 100 includes adjusting the distance between the first rotating shafts 33 of the rotating shaft assemblies 30 which are symmetrically arranged. In the case that the jig 100 further includes the second adjustor 50, adjusting the target position of the rotating shaft assembly 30 in the jig 100 further includes adjusting a distance between the first rotating shaft 33 of the rotating shaft assembly 30 and the support plate 21.

S2: for each target position of the rotating shaft assembly 30, the two support plates 21 are rotated multiple times so that the included angle between the two support plates 21 forms multiple preset rotation angles.

In the above steps, the preset rotation angle is set according to the actual situation. Illustratively, the plurality of preset rotation angles includes 160 °, 140 °, 120 °, 100 °, 80 °, 60 °, 40 °, 20 °, and 0 °, though not limited thereto.

S3: at each preset angle of rotation, the folded screen is allowed to slide freely to a relaxed state free from tensile and compressive stresses.

S4: and recording each preset rotation angle and the corresponding sliding amount of the folding screen.

In the above steps, in the case that the jig 100 includes the slide stopper 26 and the fixed stopper 27, the sliding amount of the folding screen can be obtained by measuring the moving distance of the slide stopper 26.

S5: and determining the optimal position of the rotating shaft assembly 30 according to the sliding amount of the folded screen corresponding to the preset rotation angles of the rotating shaft assembly 30 at each target position, so as to obtain the optimal rotation track of the folded screen.

In the above steps, the sliding amounts of the foldable screen corresponding to a plurality of preset rotation angles of the rotating shaft assembly 30 at each target position may be averaged, and the target position with the smallest average sliding amount may be determined as the optimal position of the rotating shaft assembly 30.

In the case that the jig 100 includes the base 11, when the bottom plate 110 of the base 11 is placed on the working plane for vertical operation, after S2 and before S3, the height of the folding screen needs to be adjusted, so that the height position of the folding screen before and after rotation does not change, the influence of the change of the height position of the folding screen on the sliding amount of the folding screen is avoided, and the measurement is more accurate.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art will appreciate that changes or substitutions within the technical scope of the present disclosure are included in the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a tool of test folding screen optimum rotation orbit which characterized in that includes:

a medial support bar extending in a first direction, the medial support bar having an axis in the first direction; a first surface of the medial support strip configured to mount a folding screen, the first surface of the medial support strip being one of two opposing major surfaces of the medial support strip;

two support assemblies disposed symmetrically with respect to an axis of the medial support bar, the support assemblies comprising:

a support plate, a first surface of the support plate configured to mount a folding screen; the first surface of the support plate is one of two opposing major surfaces of the support plate;

a sliding plate provided to a second surface of the support plate, the second surface of the support plate being the other of the two opposite main surfaces of the support plate; the support plate is connected with the sliding plate in a sliding mode, and the support plate can slide along a second direction relative to the sliding plate, and the second direction is perpendicular to the first direction;

the two rotating shaft assemblies are symmetrically arranged relative to the axis of the middle supporting bar, can be close to or far away from each other and can be respectively connected with the middle supporting bar within a preset distance; the support component can rotate around the rotating shaft component within a preset angle range.

2. The jig of claim 1, wherein the medial support bar is provided with a first mounting hole, and the rotating shaft assembly comprises:

a connector, comprising:

the first connecting part is arranged on the second surface of the middle supporting strip, and the second surface of the middle supporting strip is the other of the two opposite main surfaces of the middle supporting strip; the first connecting portion is provided with a first connecting via hole penetrating through the first connecting portion along the third direction, and the first connecting via hole extends along the second direction so that the rotating shaft assembly can move along the second direction within the preset distance; the third direction is perpendicular to the first direction and the second direction;

the second connecting part is provided with a first shaft hole which penetrates through the second connecting part along the first direction, and the first shaft hole is arranged at one side of the middle supporting bar, which is configured to be provided with the folding screen;

the first fixing piece penetrates through the first connecting through hole to be connected with the first mounting hole;

the first rotating shaft is arranged in the first shaft hole and extends out of the first shaft hole.

3. The jig of claim 2, further comprising:

the first adjusting piece is arranged on the second surface of the middle supporting bar and is connected with the middle supporting bar; the first adjustment member is configured to define a distance between the symmetrically disposed rotating shaft assemblies.

4. The jig according to claim 3, wherein the first connecting portion is further provided with a guide hole penetrating the first connecting portion in the second direction; the first adjusting member includes:

the fixing block is connected with the middle supporting bar and abuts against the first connecting parts of the symmetrically arranged rotating shaft assemblies to limit the distance between the symmetrically arranged rotating shaft assemblies;

the guide rod penetrates through the fixed block along the second direction and is connected with the fixed block; the guide rod extends into the guide hole, and the first connecting portion can slide along the guide rod.

5. The jig of claim 2, further comprising:

the second adjusting piece is arranged between the middle supporting bar and the first connecting part and is connected with the middle supporting bar; the second adjusting member is configured to adjust a distance between the medial support bar and the first rotation shaft.

6. The jig of claim 2, wherein the support assembly further comprises a slide bar connected to the slide plate; the tool still includes:

the supporting piece is connected with the middle supporting strip; along the axis of the middle supporting bar, the supporting piece is symmetrically provided with a first shaft hole and a first sliding groove, the first rotating shaft extends into the first sliding groove, and the first sliding groove extends along the second direction, so that the rotating shaft assembly can move along the second direction within the preset distance;

for synchronous gear that the axis symmetry of medial support strip set up, the gear tooth meshing of the synchronous gear of symmetry setting, synchronous gear includes:

the gear part is provided with a gear hole in the center, and at least part of the boundary of the circumference of the gear part close to the axis of the middle support bar is provided with gear teeth;

the third connecting part is provided with a second sliding groove, and the sliding rod extends into the second sliding groove so that the synchronous gear can synchronously rotate along with the supporting component; the second sliding chute extends along the second direction, so that the supporting component can move along the second direction along with the rotating shaft component within the preset distance;

and one end of the gear shaft is connected with the first shaft hole, and the other end of the gear shaft is connected with the gear hole.

7. The jig of claim 1, wherein the support assembly further comprises:

a slide rail fixed to one of the slide plate and the support plate; the slide rail extends along the second direction;

a slider fixed to the other of the sliding plate and the support plate; the slider set up in the slide rail, just the slider can follow the slide rail slides.

8. The jig according to claim 7, wherein two limiting protrusions are provided on a first boundary of the supporting plate, the first boundary being a boundary of the supporting plate parallel to the second direction; the sliding plate is provided with a slide way and a second mounting hole which penetrate through the sliding plate, and the slide way extends along the second direction;

the support assembly further comprises:

the sliding limiting block is arranged in the slideway and can slide along with the supporting plate relative to the sliding plate;

the fixed limiting block is arranged at one end of the slideway and is connected with the second mounting hole; the slide stopper is in the slide is kept away from when the one end of fixed stopper, the slide stopper with fixed stopper respectively with the lateral wall that two spacing archs are close to each other supports and leans on.

9. The jig of claim 1, wherein the support assembly further comprises:

and the carbon fiber plate is arranged on the first surface of the supporting plate.

10. The jig according to claim 1, wherein one of the two sliding plates symmetrically arranged along the axis of the medial support bar is provided with a third mounting hole;

the tool still includes:

an angle marker, comprising:

the rotating guide part is provided with an arc-shaped slideway, and the edge of the arc-shaped slideway is provided with an angle mark;

the fourth connecting part is provided with a second connecting through hole, and the second connecting through hole extends along the second direction so that the angle identification piece can move along the second direction within the preset distance;

the second fixing piece penetrates through the second connecting through hole to be connected with the third mounting hole;

a rotating identification member comprising:

the fifth connecting part is attached to the surface, deviating from the corresponding support plate, of the sliding plate which is not provided with the third mounting hole;

the identification sliding block is arranged on the fifth connecting part; the identification sliding block extends into the arc-shaped slide way and can slide along the arc-shaped slide way;

and the limiting part is connected with the identification sliding block on one side of the identification sliding block, which is far away from the fifth connecting part, so as to prevent the angle identification part from moving along the first direction relative to the rotation identification part.

11. The jig of claim 6, further comprising:

a base comprising a floor, a first connection plate, and a second connection plate, the floor configured to be placed on a work plane; the first connecting plate is connected with one of the two sliding plates symmetrically arranged along the axis of the middle supporting bar, and the second connecting plate is connected with the other sliding plate symmetrically arranged along the axis of the middle supporting bar; the first and second connecting plates are separate and configured to support corresponding sliding plates.

12. The jig of claim 11, further comprising:

the angle positioning piece is rotatably connected with the bottom plate; the angle positioning piece can rotate between an original position and a working position and can be fixed at the working position; the original position is a position where the angle positioning piece is separated from the synchronous gear, and the working position is a position where the angle positioning piece is attached to the synchronous gear.

13. The jig according to claim 12, wherein an avoiding opening is provided on the bottom plate, and an orthographic projection of the gear portion of the synchronizing gear on the bottom plate is located in the avoiding opening;

the angle positioning member includes:

the support ears are arranged on two sides of the avoiding opening and are connected with the bottom plate; a second shaft hole is formed in the supporting lug;

the second rotating shaft extends into the second shaft hole and is connected with the supporting lug;

the rocker comprises a limiting part, a rotating part and a pressing part, the rotating part is arranged on one side of the pressing part far away from the bottom plate, and the rotating part is rotatably connected with the second rotating shaft; in the working position, the pressing part is attached to the bottom plate, and the limiting part is attached to the synchronous gear to prevent the synchronous gear from rotating; in the initial position, the pressing part is separated from the bottom plate, the limiting part is separated from the synchronous gear, and the synchronous gear can rotate;

the pressing plate is provided with a sliding groove, and the sliding groove extends along the second direction;

the limiting part extends into the sliding groove, and the pressing plate can move along the extending direction of the sliding groove, so that the pressing part is pressed on the bottom plate or separated from the bottom plate.

14. The jig according to any one of claims 1 to 13, further comprising:

the pressure bar fixing part is connected with the middle supporting bar; the compression bar fixing piece is provided with a slot;

and the hollow pressing rod is inserted into the slot so as to press the part of the folding screen above the middle supporting strip.

15. A method for testing the optimal rotation track of a folding screen is applied to the jig of any one of claims 1-14, and the method comprises the following steps:

adjusting the target position of a rotating shaft assembly in the jig for multiple times, and fixing the folding screen on a supporting plate of the jig;

aiming at each target position of the rotating shaft assembly, rotating the two supporting plates for multiple times to enable an included angle between the two supporting plates to form multiple preset rotating angles;

at each preset rotation angle, the folding screen is enabled to freely slide to a relaxation state free from tensile and compressive stress;

recording each preset rotation angle and the corresponding sliding amount of the folding screen;

and determining the optimal position of the rotating shaft assembly according to the sliding amount of the folded screen corresponding to the preset rotating angles of the rotating shaft assembly at each target position, so as to obtain the optimal rotating track of the folded screen.