CN113624463B

CN113624463B - Jig and method for testing optimal rotating track of folding screen

Info

Publication number: CN113624463B
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: 2023-11-24
Anticipated expiration: 2041-08-13
Also published as: CN113624463A

Abstract

The invention discloses a jig and a method for testing an optimal rotating track of a folding screen, and relates to the technical field of display, so as to determine the optimal rotating track of the folding screen, thereby reducing the fatigue failure risk of the folding screen. The jig comprises an intermediate support bar extending along a first direction, two support assemblies and at least one group of rotating shaft assemblies, wherein the intermediate support bar is provided with an axis along the first direction; the two support components are symmetrically arranged relative to the axis of the middle support bar; the support assembly comprises a support plate and a sliding plate, wherein 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 mutually close to or mutually 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 rotating track of the folding screen.

Description

Jig and method for testing optimal rotating 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 electroluminescent display devices (Organic Light Emitting Diode, abbreviated as OLED), the morphology of the display devices is becoming more and more abundant. Among these, foldable display devices are a sign of research and development capabilities of various manufacturers.

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

Disclosure of Invention

The present disclosure provides a jig and a method for testing an optimal rotation track of a folding screen, so as to determine the optimal rotation track of the folding screen, thereby reducing fatigue failure risk of the folding screen, prolonging service life, and improving reliability.

In order to achieve the above purpose, the present disclosure adopts the following technical scheme:

in one aspect, a fixture for testing an optimal rotation track of a folding screen is provided. The jig for testing the optimal rotating track of the folding screen comprises an intermediate support bar, two support 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. The first surface of the medial support bar is configured to mount a folding screen, the first surface of the medial support bar being one of two opposing major surfaces of the medial support bar.

The two support components are symmetrically arranged relative to the axis of the middle support bar. The support assembly includes a support plate and a sliding 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. The sliding plate is arranged on a second surface of the supporting plate, and the second surface of the supporting plate is the other of two opposite main surfaces of the supporting plate; the support plate is in sliding connection with the sliding plate, 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 group of rotating shaft assemblies comprises two rotating shaft assemblies which are symmetrically arranged relative to the axis of the middle supporting bar, and the two rotating shaft assemblies which are symmetrically arranged can be mutually close to or far away from each other and can be respectively connected with the middle supporting bar within a preset distance. The support assembly is rotatable about the rotation axis assembly within a predetermined angular range.

In some embodiments, the intermediate 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, wherein the first connecting part is arranged on the second surface of the middle supporting bar, and the second surface of the middle supporting bar is the other of two opposite main surfaces of the middle supporting bar; the first connecting part is provided with a first connecting via hole penetrating through the first connecting part 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 is provided with a first shaft hole penetrating through the second connecting portion along the first direction, and the first shaft hole is arranged on 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.

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

In some embodiments, the first connection portion is further provided with a guide hole penetrating the first connection portion in the second direction. The first adjusting piece comprises a fixed block and a guide rod, wherein the fixed block is connected with the middle supporting bar and abuts against the first connecting part of the symmetrically arranged rotating shaft assembly 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 part can slide along the guide rod.

In some embodiments, the jig further comprises a second adjusting member disposed between the intermediate support bar and the first connecting portion and connected to the intermediate support bar; the second adjustment member is configured to adjust a distance between the intermediate support bar and the first rotation shaft.

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

The support member is connected with the intermediate support bar. Along the axis of middle support bar, 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 predetermine the distance is followed the second direction removes.

The synchronous gears are symmetrically arranged relative to the axis of the middle support bar, and gear teeth of the symmetrically arranged synchronous gears are meshed. The synchronous gear comprises a gear part and a third connecting part, a gear hole is formed in the center of the gear part, and gear teeth are formed in at least part of the boundary, which is close to the axis of the middle support bar, of the circumference of the gear part. The third connecting part is provided with a second chute, and the sliding rod extends into the second chute 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 support 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 slide plate and the support plate; the slider is fixed to the other of the sliding plate and the supporting plate, and the slider is slidable along the slide rail.

In some embodiments, two limit protrusions are provided on a first boundary of the support plate, where the first boundary is a boundary of the support plate parallel to the second direction. The sliding plate is provided with a slideway penetrating through the sliding plate and a second mounting hole, and the slideway extends along the second direction.

The support assembly further comprises a sliding limiting block and a fixed limiting block, wherein the sliding limiting block is arranged in the slideway and can slide along with the support 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 sliding limiting block is arranged at one end of the slideway far away from the fixed limiting block, and the sliding limiting block and the fixed limiting block are respectively abutted against the side walls of the two limiting protrusions, which are close to each other.

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 part, a fourth connecting part and a second fixing piece, wherein the rotation guide part 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 via hole, and the second connecting via hole extends along the second direction, so that the angle identifier 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.

The rotary identification piece comprises a fifth connecting portion and an identification sliding block, and the fifth connecting portion is attached to the surface of the corresponding support plate, which is away from the surface of the corresponding support plate, of the sliding plate, wherein the sliding plate is not provided with the third mounting hole. The identification sliding block is arranged on the fifth connecting part; the identification sliding block stretches into the arc-shaped slideway, and the identification sliding block can slide along the arc-shaped slideway.

The limiting piece is connected with the identification sliding block at 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 rotary identification piece.

In some embodiments, the jig further comprises a base comprising a bottom plate, a first connection plate, and a second connection plate, the bottom plate configured to rest on a work plane; the first connecting plate is connected with one of 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 connection plate is separated from the second connection plate, and the first connection plate and the second connection plate are configured to support corresponding sliding plates.

In some embodiments, the jig further comprises an angular positioning member rotatably connected to the base 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 avoidance opening, and an orthographic projection of the gear part of the synchronous gear on the bottom plate is positioned in the avoidance opening. The angle positioning piece comprises a supporting lug, a second rotating shaft, a wane, a pressing plate and a limiting piece.

The supporting lugs are arranged on two sides of the avoidance opening and are 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 to be connected with the supporting lug. The wane includes spacing portion, rotation portion and presses the portion, rotation portion set up in press the portion keep away from one side of bottom plate, rotation portion with the second pivot rotates to be 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 original 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 piece stretches 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 the pressing part is separated from the bottom plate.

In some embodiments, the jig further comprises a compression bar fixing member and a hollow compression bar, the compression bar fixing member being connected with the middle support bar; the compression bar mounting is equipped with the slot. The hollow compression bar is inserted into the slot to press the part of the folding screen above the middle support bar.

According to the jig for testing the optimal rotating track of the folding screen, the supporting component can rotate around the rotating shaft component, and the position of the rotating shaft component can be adjusted within the 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, a first surface of a support plate in the support assembly is configured to mount the folding screen, the support plate being slidable in a second direction relative to the sliding plate. That is, the support plate rotates with the sliding plate about the rotation axis assembly, and during rotation, the support plate is slidable in a second direction relative to the sliding plate 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, the rotation center of the folding screen is the rotation center of the support assembly, that is, the position of the rotation center of the folding screen may be changed as the position of the rotation shaft assembly is changed. In this case, the target position of the rotation shaft assembly may be adjusted a plurality of times, and the two support plates are rotated a plurality of times for each rotation shaft assembly of the positions so that the included angle between the two support plates becomes a plurality of preset rotation angles. At each preset rotation angle, the folding screen is made to slide freely to a relaxed state free from tensile and compressive stresses, i.e. the support plate slides freely in the second direction relative to the sliding plate under the action of the tensile and compressive stresses of the folding screen to a position in which the folding screen is made to slide freely to a relaxed state free from tensile and compressive stresses. At this time, recording the sliding quantity of each preset rotation angle and the corresponding folding screen; according to the sliding quantity of the folding screen corresponding to a plurality of 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 rotating 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 an optimal rotation track of a folding screen is further provided, and the method is applied to the jig in any one of the above embodiments, and includes: the target position of the rotating shaft component in the jig is adjusted for multiple times, and the folding screen is fixed on the supporting plate of the jig; rotating the two support plates for multiple times aiming at each target position of the rotating shaft assembly, so that an included angle between the two support plates forms multiple preset rotating angles; at each preset rotation angle, the folding screen is enabled to freely slide to a relaxation state which is not subjected to tensile and compressive stress; recording the sliding quantity of each preset rotating angle and the corresponding folding screen; and determining the optimal position of the rotating shaft assembly according to the sliding amounts of the folding screen corresponding to the preset rotating angles of the rotating shaft assembly at each target position, and obtaining the optimal rotating track of the folding screen.

The beneficial effects of the method for testing the optimal rotating track of the folding screen provided by the embodiment of the disclosure are the same as those of the jig for testing the optimal rotating track of the folding screen provided by the technical scheme, and are not described in detail herein.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need 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 may be obtained according to these drawings to those of ordinary skill in the art. Furthermore, the drawings in the following description may be regarded as schematic diagrams, not limiting the actual size of the products, the actual flow of the methods, the actual timing of the signals, etc. according to 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 folding screen according to some embodiments;

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

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

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

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

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

FIG. 9 is a block diagram of an angle identifier, a rotational identifier, and a limiter of a jig for testing an optimal rotational trajectory of a folding screen according to some embodiments;

FIG. 10 is an enlarged view of an angular positioning of a fixture for testing an optimal rotational trajectory of a folding 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

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and its other forms such as the third person referring to the singular form "comprise" and the present word "comprising" are to be construed as open, inclusive meaning, i.e. as "comprising, but not limited to. In the description of the present specification, the terms "some embodiments," "examples," or "examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

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.

Exemplary embodiments are described herein with reference to cross-sectional and/or plan views as idealized exemplary figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Thus, variations from the shape of the drawings due to, for example, 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", "equal" includes the stated case as well as the case that approximates the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable deviation range for approximately parallel may be, for example, a deviation within 5 °; "vertical" includes absolute vertical and near vertical, where the acceptable deviation range for near vertical may also be deviations within 5 °, for example. "equal" includes absolute equal and approximately equal, where the difference between the two, which may be equal, for example, is less than or equal to 5% of either of them within an acceptable deviation of approximately equal.

Currently, the foldable display device may 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 is required to meet the reliability of mechanical properties under the folding condition, and the display module of the foldable display device cannot generate the phenomena of damage, stripping of adhesive materials and the like when being folded through the rotating shaft.

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 foldable display device design.

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 an intermediate support bar 10, two support assemblies 20, and at least one set of rotation shaft assemblies 30.

As shown in fig. 2, 3 and 4, the medial support bar 10 extends in a first direction X, and the medial support bar 10 has an axis L in the first direction X. Wherein the medial support bar 10 has two opposed major surfaces, a first surface 101 and a second surface 102 of the medial support bar 10, respectively. It should be noted that the first surface 101 of the medial support bar 10 is configured to mount a folding screen, and the second surface 102 of the medial support bar 10 is the surface opposite to the first surface 101 of the 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 intermediate support bar 10. The support assembly 20 includes a support plate 21 and a slide plate 22.

Referring to fig. 5, the support plate 21 has two opposite major surfaces, a first surface 210 and a second surface 211 of the support plate 21, respectively. It should be noted 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 slide plate 22, and the support plate 21 is slidable relative to the slide plate 22 in 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 weight and cost.

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

It should be noted that, the preset distance is set according to the actual situation, so that the folding screen installed on the support assembly 20 can freely slide to a relaxed state free from tensile and compressive stress when the support assembly 20 rotates to any angle.

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

In the jig 100 for testing an optimal rotation trajectory of a folding screen according to some embodiments of the present disclosure, the support assembly 20 may rotate around the rotation shaft assembly 30, and the position of the rotation shaft assembly 30 may be adjusted within a preset distance in the second direction Y. That is, the rotation center of the support assembly 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, the support plate 21 being slidable in the second direction Y relative to the sliding plate 22. That is, the support plate 21 rotates together with the slide 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 slide plate 22 under the influence of other external forces (e.g., tensile and compressive stresses of the folding screen).

Based on this, in the case of the folding screen mounted on the support plate 21, the rotation center of the folding screen is the rotation center of the support assembly 20, that is, the position of the rotation center of the folding screen may be changed as the position of the rotation shaft assembly 30 is changed. In this case, the target position of the rotation shaft assembly 30 may be adjusted a plurality of times, and the two support plates 21 may be rotated a plurality of times for each target position of the rotation shaft assembly 30 such that the included angle between the two support plates 21 becomes a plurality of preset rotation angles. At each preset rotation angle, the folding screen is free to slide into a relaxed state free from tensile and compressive stresses, i.e. the support plate 21 is free to slide in the second direction Y relative to the sliding plate 22 into a position free from tensile and compressive stresses of the folding screen in the relaxed state. At this time, recording the sliding quantity of each preset rotation angle and the corresponding folding screen; according to the sliding amounts of the folding screen corresponding to a plurality of 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 rotating 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 a first surface of the support plate 21. Illustratively, the carbon fiber plate 28 is connected to the support plate 21 by a threaded connection. In this way, the folding screen can be directly adhered to the carbon fiber plate 28, and after the folding screen is replaced, a new carbon fiber plate 28 can be replaced, so that the measurement accuracy is ensured, 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 about the axis L of the medial support bar 10. Along the first direction X, the two sets of rotation shaft assemblies 30 are symmetrically disposed at two ends of the middle support bar 10, so that two ends of each support assembly 20 are rotationally connected with the corresponding rotation shaft assemblies 30, and the rotation process of the support assemblies 20 is smoother.

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

Referring to fig. 1 and 4, the connector 31 includes a first connecting portion 311 and a second connecting portion 312, the first connecting portion 311 being disposed on the second surface 102 of the medial support bar 10. The first connecting portion 311 is provided with a first connecting via hole penetrating the first connecting portion 311 along the third direction Z, and the first connecting via hole extends along the second direction Y, so that the rotating 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 piece 32 is coupled with the first mounting hole on the medial support bar 10 through the first coupling via. Illustratively, the first fixing member 32 is a screw, the first mounting hole is a screw hole, and the screw is fastened to the screw hole through the first connection via hole, so that the connection member 31 is fixed to the intermediate support bar 10.

When the position of the rotation shaft assembly 30 needs to be adjusted, first, the first fixing member 32 is separated from the first mounting hole; then, the connecting member 31 is moved in the second direction Y; finally, when the connecting member 31 moves to the target position, the first fixing member 32 is fixed to the first mounting hole through the first connecting via 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 in the first direction X, the first shaft hole being provided at one side of the intermediate support bar 10 configured to mount the folding screen. The first rotating 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 about the first rotation shaft 33 of the corresponding rotation shaft assembly 30, i.e., the first rotation shaft 33 of each rotation shaft assembly 30 is the rotation center of the corresponding support plate 21, i.e., the rotation 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, where 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 symmetrically disposed rotating shaft assemblies 30.

Illustratively, the first adjusting member 40 is a rectangular parallelepiped, and two 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, according to a plurality of target positions between two symmetrically arranged rotating shaft assemblies 30, a plurality of first adjusting members 40 with different sizes may be designed, and the rotating shaft assemblies 30 with different target positions may be defined by using the first adjusting members 40 with different sizes.

As can be seen from the above, when the distance between the symmetrically arranged rotation shaft assemblies 30 is adjusted, the first adjusting member 40 is used to define the distance between the two rotation shaft assemblies 30, and then the rotation shaft assemblies 30 are fixedly connected with the middle support bar 10, so as to facilitate operation.

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

Referring to fig. 4, the first adjusting member 40 includes a fixing block 41 and a guide bar 42, and the fixing block 41 is connected with the intermediate support bar 10 and abuts against the first connection portion 311 of the symmetrically disposed rotation shaft assemblies 30 to define a distance between the symmetrically disposed rotation shaft assemblies 30. Here, the fixing block 41 may be the above-mentioned rectangular parallelepiped, and the present 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 with the fixing block 41. The guide rod 42 extends into the guide hole, and the first connecting portion 311 is slidable along the guide rod 42.

In this case, the link 31 may slide along the guide rod 42 so that the rotation shaft assembly 30 reaches the target position and forms a preliminary limit for the link 31, for example, preventing the link 31 from moving toward or away from the intermediate support bar 10, which facilitates not only the movement of the rotation shaft assembly 30 to the target position but also the subsequent fixing of the link 31 to the intermediate support bar 10.

Referring to fig. 4, in some embodiments, the jig 100 further includes a second adjusting member 50, where the second adjusting member 50 is disposed between the middle supporting bar 10 and the first connecting portion 311 and is connected to the middle supporting bar 10; the second adjusting member 50 is configured to adjust the distance between the intermediate support bar 10 and the first rotary shaft 33 to determine the distance between the first rotary shaft 33 and the folding screen.

It should be noted that, according to a plurality of target positions of the rotation shaft assembly 30, a plurality of second adjusting members 50 with different sizes may be designed, and the rotation shaft assembly 30 with different target positions may be adjusted by using the second adjusting members 50 with different sizes.

Referring to fig. 1 and 7, in some embodiments, support assembly 20 further includes a slide bar 23, slide bar 23 being coupled to 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 a 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 such that the support assembly 20 can rotate about the first rotation shaft 33 (see fig. 4).

Referring to fig. 1, 7 and 8, the supporting pieces 60 are connected to the intermediate supporting bar 10. Along the axis L of the intermediate 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 both ends of the first rotating shaft 33 are supported by other components, and stability of the first rotating shaft 33 is improved. The first sliding groove 62 extends along the second direction Y, so that the rotation shaft assembly 30 can move along the second direction Y within a preset distance, that is, the first rotation shaft 33 of the rotation shaft assembly 30 can move along the second direction Y within a 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, connected to the middle supporting bar 10 through the first adjusting member 40, so as to facilitate manufacturing. In addition, the first shaft hole 61 and the first chute 62 may be communicated, and the sizes of the first shaft hole and the first chute 62 may be inconsistent, so that the size of the supporting member 60 may be smaller, and space occupation may be reduced.

Referring to fig. 1 and 7, the synchronizing gear 70 is symmetrically disposed with respect to the axis L of the intermediate 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 groove 720, and the slide bar 23 extends into the second sliding groove 720, so that the synchronizing gear 70 can synchronously rotate with the corresponding support assembly 20. The second sliding groove 720 extends along the second direction Y, so that the support assembly 20 can move along the second direction Y along with the rotating shaft assembly 30 within a preset distance.

Further, the center of the gear portion 71 is provided with a gear hole 710 (see fig. 10), at least a portion of the boundary of the gear portion 71 circumferentially adjacent to the axis L of the intermediate support bar 10 is provided with a gear tooth 711, and the gear teeth 711 of the symmetrically disposed synchronizing gears 70 are engaged to synchronously rotate the symmetrically disposed support assemblies 20.

Illustratively, the boundary of the gear portion 71 provided with the gear teeth 711 corresponds to a central angle of about 90 ° such that the corresponding rotation range of the support assembly 20 is 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 a gear hole 710 (see fig. 10) such that the synchronizing gear 70 can rotate with respect to the gear shaft 80 or the synchronizing gear 70 and the gear shaft 80 can rotate 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; the slide rail 24 is fixed to the other of the slide plate 22 and the support plate 21, and the 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 shaped like a "U" along a section in the first direction X, the top of the "U" having a peg facing the interior of the "U"; the slider 25 has an approximately "i" shape in cross section along the first direction X. The concave parts on the two sides of the I-shaped are matched with the plugboards on the top end of the U-shaped, and the bottom of the I-shaped is at least partially abutted against the bottom of the U-shaped, 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 quite stable, and relative shaking is not easy to occur 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 is protruded in the direction of the sliding plate 22 to form the reinforcing portion 214, and the slider 25 is engaged with the reinforcing portion 214 and then fixedly connected by a screw, thereby facilitating the operation and enhancing the connection reliability.

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

Referring to fig. 6 and 7, the slide plate 22 is provided with a slideway 223 penetrating the slide plate 22 and a second mounting hole, and the slideway 223 extends along the second direction Y. The support assembly 20 further includes a sliding stopper 26 and a fixed stopper 27, wherein the sliding stopper 26 is disposed in the slideway 223 and can slide along with the support plate 21 relative to the sliding plate 22. The fixed limiting block 27 is disposed at one end of the slideway 223 and connected with the second mounting hole, so as to be fixed on the sliding plate 22. When the slide rail 223 is far away from one end of the fixed stopper 27, the sliding stopper 26 and the fixed stopper 27 are respectively contacted with the side walls of the two limiting protrusions 213 which 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 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 index 91, a rotational index 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 disposed on the first connection plate 120 of the base 11.

Referring to fig. 1 and 9, the angle marker 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 slide 9100, and an edge of the arc-shaped slide 9100 is provided with an angle marker. The fourth connection portion 911 is provided with a second connection via 9111, and the second connection via 9111 extends along the second direction Y, so that the angle identifier 91 can move along the second direction Y within a preset distance, that is, it is ensured that the position of the angle identifier 91 is not affected when the sliding plate 22 is adjusted along with the rotation shaft assembly 30. The second fixing member passes through the second connection via 9111 to be connected to 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 rotation index 92 includes a fifth connection portion 920 and an index slide 921, and the fifth connection portion 920 is attached to a surface of the slide plate 22, which is not provided with the third mounting hole, facing away from the corresponding support plate 21, so that the slide plate 22 does not affect the position of the rotation index 92 when the rotation shaft assembly 30 is adjusted in position. The marking slider 921 is provided on the fifth connecting portion 920; the marking slide 921 extends into the arc slide 9100, and the marking slide 921 can slide along the arc slide 9100.

Referring to fig. 1 and 9, the stopper 93 is coupled to the marking slider 921 at a side of the marking slider 921 away from the fifth coupling portion 920 to prevent the angular marking member 91 from moving in the first direction X with respect to the rotational marking member 92. For example, the stopper 93 is a screw.

In this case, after the sliding plate 22 rotates around the first rotation shaft 33, the rotation identifier 92 is rotated along the arc-shaped slideway 9100, so that the rotation identifier 92 abuts against the sliding plate 22, and the rotation angle of the sliding plate 22 (i.e. the rotation angle of the supporting component 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 bottom plate 110, a first connection plate 120, and a second connection plate 130, the bottom plate 110 being configured to be placed on a work plane, the first connection plate 120 being connected to one of the two sliding plates 22 symmetrically disposed along the axis L of the medial support bar 10, and the second connection plate 130 being connected to the other sliding plate 22 symmetrically disposed along the axis L of the medial support bar 10. The first connection plate 120 is separated from the second connection plate 130, and the first connection plate 120 and the second connection plate 130 are configured to support the corresponding sliding plate 22. In this way, the jig 100 can be operated vertically, and the gravity influence on the folding screen is smaller and the measurement is more accurate in the rotation process.

It should be noted that one of the first connection plate 120 and the second connection plate 130 may be connected to the base plate 110 (illustrated in fig. 3 as the first connection plate 120 is connected to the base plate 110), and the other may be connected to other external support members, which is not illustrated herein.

Referring to fig. 1 and 10, in some embodiments, jig 100 further includes an angular positioning member 94, angular positioning member 94 being rotatably coupled to base 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 member 94 is separated from the synchronizing gear 70, and the working position is a position where the angle positioning member 94 is attached to the synchronizing gear 70. Thus, after the support assembly 20 is rotated to a predetermined rotation angle, the angular positioning member 94 can be rotated to the operating position to position the angle for convenient measurement,

Referring to fig. 10, illustratively, the base plate 110 is provided with a relief 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 relief opening 1100. The angular positioning member 94 includes a support tab 941, a second pivot 942, a rocker 943, a pressure plate 944, and a limiter 945.

Referring to fig. 10, support lugs 941 are provided at both sides of the escape opening 1100 and are connected to the bottom plate 110. The support lugs 941 are provided with second shaft holes. The second shaft 942 extends into the second shaft hole and is connected to the support ear 941.

Referring to fig. 10, the rocker 943 includes a 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 base 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 attached to the base plate 110, and the limiting portion 9431 is attached to the synchronizing gear 70 to prevent the synchronizing gear 70 from rotating. In the original position, the pressing portion 9433 is separated from the bottom plate 110, the limiting portion 9431 is separated from the synchronizing gear 70, and the synchronizing gear 70 can rotate.

Referring to fig. 10, the pressure plate 944 is provided with a chute 9440, and the chute 9440 extends in the second direction Y. The limiting member 945 extends 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 on the base plate 110 or the pressing portion 9433 is separated from the base plate 110, so as to fix the rocker 943 in the working position or release the rocker from the working position. Illustratively, the stop 945 includes two screws disposed 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 being connected with the intermediate support bar 10; the compression bar fixing member 12 is provided with a slot. The hollow compression bar 13 is inserted into the insertion slot to press the portion of the folding screen located above the intermediate support bar 10, preventing the portion of the folding screen located above the intermediate support bar 10 from tilting. Illustratively, the hollow plunger 13 is a cylindrical hollow plunger 13.

Some embodiments of the present disclosure further provide a method for testing an optimal rotation track of a folding screen, which is applied to the jig 100 of any one of the above embodiments, referring to fig. 11, and the method includes S1 to S5.

S1: the target position of the rotating shaft assembly 30 in the jig 100 is adjusted multiple times to fix the folding screen to the support plate 21 of the jig 100.

In the above steps, adjusting the target position of the rotation shaft assembly 30 in the jig 100 includes adjusting the distance between the first rotation shafts 33 of the symmetrically disposed rotation shaft assemblies 30. In the case that the jig 100 further includes the second adjusting member 50, adjusting the target position of the rotation shaft assembly 30 in the jig 100 further includes adjusting the distance between the first rotation shaft 33 of the rotation shaft assembly 30 and the support plate 21.

S2: for each target position of the rotation shaft assembly 30, the two support plates 21 are rotated a plurality of times such that the included angle between the two support plates 21 becomes a plurality of preset rotation angles.

In the above step, 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 °, although not limited thereto.

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

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

In the above step, in the case where the jig 100 includes the sliding stopper 26 and the fixed stopper 27, the sliding amount of the folding screen can be obtained by measuring the distance moved by the sliding stopper 26.

S5: according to the sliding amounts of the folding screen corresponding to a plurality of 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.

In the above step, the sliding amounts of the folding screen corresponding to the plurality of preset rotation angles of the rotation shaft assembly 30 for 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 rotation 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 to perform the 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 is not changed before and after the folding screen rotates, 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 foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art who is skilled in the art will recognize that changes or substitutions are within the technical scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A tool of the optimal rotation orbit of test folding screen, characterized by, include:

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

two support assemblies symmetrically disposed about 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 disposed on a second surface of the support plate, the second surface of the support plate being the other of the two opposite major surfaces of the support plate; the support plate is in sliding connection with the sliding plate, and can slide along a second direction relative to the sliding plate, and the second direction is perpendicular to the first direction;

at least one group of two rotating shaft assemblies symmetrically arranged relative to the axis of the middle supporting bar, wherein the symmetrically arranged rotating shaft assemblies can be mutually close to or far away from each other and are 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;

Be equipped with first mounting hole on the intermediate support strip, rotation axis subassembly includes:

a connector, comprising:

a first connection portion provided at a second surface of the medial support bar, the second surface of the medial support bar being the other of the two opposite major surfaces of the medial support bar; the first connecting part is provided with a first connecting via hole penetrating through the first connecting part along a 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;

a second connecting portion provided with a first shaft hole penetrating the second connecting portion in the first direction, the first shaft hole being provided at a side of the intermediate support bar configured to mount a folding screen;

the first fixing piece penetrates through the first connecting through hole and is 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.

2. The jig of claim 1, 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.

3. The jig according to claim 2, wherein the first connection portion is further provided with a guide hole penetrating the first connection portion in the second direction; the first regulating member includes:

a fixing block connected with the middle support bar and abutted against the first connection part of the symmetrically arranged rotating shaft assembly 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 part can slide along the guide rod.

4. The jig of claim 1, 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 adjustment member is configured to adjust a distance between the intermediate support bar and the first rotation shaft.

5. The jig of claim 1, wherein the support assembly further comprises a slide bar connected to the slide plate; the jig further comprises:

a support connected to the intermediate support bar; the support piece is symmetrically provided with a first shaft hole and a first sliding groove along the axis of the middle support bar, the first rotating shaft stretches 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;

Synchronous gear for the axis symmetry setting of medial support bar, the gear tooth meshing of synchronous gear of symmetry setting, synchronous gear includes:

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

the third connecting part is provided with a second chute, and the sliding rod extends into the second chute 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 support 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.

6. 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 sliding rail extends along the second direction;

a slider fixed to the other of the sliding plate and the supporting plate; the sliding block is arranged in the sliding rail and can slide along the sliding rail.

7. The jig according to claim 6, wherein two limit protrusions are provided on a first boundary of the support plate, the first boundary being a boundary of the support plate parallel to the second direction; the sliding plate is provided with a slideway penetrating through the sliding plate and a second mounting hole, and the slideway 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 sliding limiting block is arranged at one end of the slideway far away from the fixed limiting block, and the sliding limiting block and the fixed limiting block are respectively abutted against the side walls of the two limiting protrusions, which are close to each other.

8. 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.

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

the jig further comprises:

An angle identifier, comprising:

the rotary 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 via hole, and the second connecting via hole extends along the second direction so that the angle identifier can move along the second direction within the preset distance;

the second fixing piece penetrates through the second connecting through hole and is connected with the third mounting hole;

a rotational identification member comprising:

a fifth connecting part attached to the surface of the sliding plate back-away from the corresponding supporting plate, wherein the sliding plate 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 slideway, and can slide along the arc-shaped slideway;

and the limiting piece is connected with the identification sliding block at one side of the identification sliding block away from the fifth connecting part so as to prevent the angle identification piece from moving along the first direction relative to the rotary identification piece.

10. The jig of claim 5, further comprising:

a base including a base plate, a first connection plate, and a second connection plate, the base plate configured to rest on a work plane; the first connecting plate is connected with one of 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 connection plate is separated from the second connection plate, and the first connection plate and the second connection plate are configured to support corresponding sliding plates.

11. The jig of claim 10, further comprising:

the angle positioning piece is rotationally 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.

12. The jig according to claim 11, wherein the bottom plate is provided with an avoidance opening, and an orthographic projection of the gear portion of the synchronizing gear on the bottom plate is positioned in the avoidance opening;

the angle positioning member includes:

the supporting lugs are arranged on two sides of the avoidance opening and are connected with the bottom plate; the support lug is provided with a second shaft hole;

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, wherein the rotating part is arranged on one side of the pressing part away from the bottom plate, and the rotating part is rotationally 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 original 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 piece stretches 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 the pressing part is separated from the bottom plate.

13. The jig according to any one of claims 1 to 12, further comprising:

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

and the hollow compression bar is inserted into the slot to press the part of the folding screen above the middle support bar.

14. A method for testing an optimal rotation track of a folding screen, which is applied to the jig according to any one of claims 1 to 13, the method comprising:

the target position of the rotating shaft component in the jig is adjusted for multiple times, and the folding screen is fixed on the supporting plate of the jig;

rotating the two support plates for multiple times aiming at each target position of the rotating shaft assembly, so that an included angle between the two support plates forms multiple preset rotating angles;

at each preset rotation angle, the folding screen is enabled to freely slide to a relaxation state which is not subjected to tensile and compressive stress;

Recording the sliding quantity of each preset rotating angle and the corresponding folding screen;

and determining the optimal position of the rotating shaft assembly according to the sliding amounts of the folding screen corresponding to the preset rotating angles of the rotating shaft assembly at each target position, and obtaining the optimal rotating track of the folding screen.