CN109946154B - Flexible screen body circuit board drawing force testing device and testing method - Google Patents
Flexible screen body circuit board drawing force testing device and testing method Download PDFInfo
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Abstract
The invention provides a flexible screen body circuit board drawing force testing device and a testing method, wherein the testing device comprises: a clamping part including a first clamping plate and a second clamping plate disposed opposite to each other; and the drawing device is provided with a chuck, is connected with the power device and can move relative to the first clamping plate. The first clamping plate and the second clamping plate are arranged to stably clamp the flexible screen body, so that the risk that the flexible screen body is bent along with the flexible circuit board can be prevented; the exposed sub-blocks can be pulled by arranging the pulling device, and the flexible circuit board can be directly pulled from the flexible screen body by the pulling device because the flexible screen body is fixed in the pulling test process; meanwhile, the flexible screen body is conveniently clamped, disassembled and replaced by the aid of the first clamping part and the second clamping part, and accordingly testing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of flexible screen body drawing tests, in particular to a flexible screen body circuit board drawing force testing device.
Background
With the progress of science and technology and the development of display industry, the flexible screen body is sought by terminal customers.
For the flexible screen body, the flexible screen body is made of polyimide materials, the texture is soft, and the flexible screen body is often required to be subjected to a drawing force test. The flexible screen body comprises a flexible circuit board and a flexible screen body connected with the flexible circuit board, the flexible circuit board is often connected to the flexible screen body in the prior art, a connecting part is formed at the joint part of the flexible circuit board and the flexible screen body, and the drawing test is mainly used for testing the force generated when the flexible circuit board is separated from the flexible screen body, namely the flexible circuit board is pulled out from the connecting part. However, because the flexible screen body is flexible, the existing testing mode cannot be integrally fixed, the screen body is bent along with the FPC (flexible circuit board) when the flexible screen body is pulled, the screen body is easily damaged, and the FPC (flexible circuit board) and the screen body cannot be separated, so that the binding pull force of the FPC (flexible circuit board) cannot be tested.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the drawing force test cannot be performed between the flexible circuit board and the flexible screen body in the prior art.
Therefore, the invention provides a device for testing the drawing force of a flexible screen body circuit board, which comprises: a clamping part including a first clamping plate and a second clamping plate disposed opposite to each other; and the drawing device is provided with a chuck, is connected with the power device and can move relative to the first clamping plate.
The first clamping plate is connected with the second clamping plate through screws, and at least one of the first clamping plate and the second clamping plate is fixed.
The first clamping plate is provided with a plurality of lugs which are arranged at intervals.
The testing device provided by the invention further comprises a cutting device, wherein a power device for driving the cutting device to move is connected to the cutting device, and the cutting device can move relative to the first clamping plate.
The length of the first clamping plate is smaller than that of the second clamping plate, and the cutting device is movably arranged in a space where the second clamping plate exceeds the first clamping plate.
The invention provides a testing device, wherein the cutting device comprises at least one blade.
In the flexible screen body circuit board drawing force testing device provided by the invention, a plurality of the lugs are arranged at equal intervals, and the distance between two adjacent blades is consistent with the shortest distance between two adjacent lugs.
In the flexible screen body circuit board drawing force testing device provided by the invention, the drawing device further comprises a dynamometer connected with the chuck.
A method for testing the drawing force of a flexible screen body circuit board comprises the following steps: cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks; fixing the flexible screen body; and an external force acts on the sub-block to perform drawing operation on the sub-block, and the force at the moment when the sub-block is separated from the flexible screen body is recorded.
In the step of cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks, the circuit board and the connecting part of the circuit board and the flexible screen body are cut along the cutting direction of the flexible circuit board.
The technical scheme of the invention has the following advantages:
1. the invention provides a flexible screen body circuit board drawing force testing device, which comprises: a clamping part including a first clamping plate and a second clamping plate disposed opposite to each other; and the drawing device is provided with a chuck, is connected with the power device and can move relative to the first clamping plate.
The first clamping plate and the second clamping plate are arranged to stably clamp the flexible screen body, so that the risk that the flexible screen body is bent along with the flexible circuit board can be prevented; the exposed sub-blocks can be pulled by arranging the pulling device, and the flexible circuit board can be directly pulled from the flexible screen body by the pulling device because the flexible screen body is fixed in the pulling test process; meanwhile, the flexible screen body is conveniently clamped, disassembled and replaced by the aid of the first clamping part and the second clamping part, and accordingly testing efficiency is improved.
2. According to the flexible screen body circuit board drawing force testing device provided by the invention, the first clamping plate and the second clamping plate are fixed through screws, and at least one of the first clamping plate and the second clamping plate is fixed. The screw can be disassembled, so that the first clamping plate and the second clamping plate can be conveniently disassembled and assembled, and the flexible screen body can be conveniently replaced
3. According to the flexible screen body circuit board drawing force testing device provided by the invention, the first clamping plate is provided with the lugs which are arranged at intervals.
In the drawing force test process, the subblocks arranged at intervals can be compressed by arranging the convex blocks, so that the phenomenon that the adjacent subblocks are driven when the exposed subblocks are drawn is prevented, and the stability of the subblocks in the test process is improved.
4. According to the flexible screen body circuit board drawing force testing device provided by the invention, the cutting device is used for cutting the flexible circuit board exposed to the outer side of the clamping part, so that the flexible circuit board is respectively cut into a plurality of sub-blocks. The cutting device provided by the invention can realize automatic cutting of the flexible circuit board, and is beneficial to reducing the labor cost while improving the system integration level.
5. According to the flexible screen body circuit board drawing force testing device provided by the invention, the length of the first clamping plate is smaller than that of the second clamping plate, and the cutting device is arranged in the space where the second clamping plate exceeds the first clamping plate, so that the integration and compactness of the whole device are improved.
6. In the flexible screen body circuit board drawing force testing device provided by the invention, the cutting device comprises at least one blade. Through the motion of blade, can cut flexible circuit board, the motion route of blade can be adjusted according to drawing the action needs simultaneously to cut out the subblock of different sizes.
7. In the flexible screen body circuit board drawing force testing device provided by the invention, a plurality of the lugs are arranged at equal intervals, and the distance between two adjacent blades is consistent with the shortest distance between two adjacent lugs. The arrangement mode can enable the subblocks to be arranged between every two adjacent convex blocks, the size of each subblock is the same, and the subblocks with the same size can improve the accuracy of measurement. Meanwhile, the two bumps act on two sides of the sub-block to be tested simultaneously, so that the two sides of the sub-block pressed by the bumps in the drawing process can be prevented from tilting or separating, and the stability of the drawing process is improved.
8. The invention provides a method for testing the drawing force of a flexible screen body circuit board, which comprises the following steps: cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks; fixing the flexible screen body; and an external force acts on the sub-block to perform drawing operation on the sub-block, and the force at the moment when the sub-block is separated from the flexible screen body is recorded.
The large flexible screen body is divided into a plurality of blocks, the whole is broken into parts, the required tension of the small flexible circuit board is synchronously reduced, the pulling force applied to the flexible screen body in the drawing process is synchronously reduced after the tension is reduced, and the flexible screen body is prevented from being damaged when being subjected to overlarge pulling force while the separation action between the flexible screen body and the flexible screen body is convenient to occur.
9. In the method for testing the pulling force of the flexible screen body circuit board, the circuit board and the connecting part of the circuit board and the flexible screen body are cut along the cutting direction of the flexible circuit board in the step of cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks.
Through the cutting to connecting portion, cut into a plurality of independent fritters each other with connecting portion, drawing the in-process to the subblock, the connecting portion of adjacent subblock can not cause the interference to the connecting portion of the subblock that carries out the test, ensures to draw the stability of process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a drawing apparatus for drawing a subblock according to the present invention;
FIG. 2 is a schematic view of a first structure of a flexible printed circuit board before a drawing operation according to the present invention;
FIG. 3 is a schematic diagram of a second structure of a flexible printed circuit board before a drawing operation according to the present invention;
FIG. 4 is a schematic view of the assembly of the flexible circuit board with the clamping portion during the drawing operation;
FIG. 5 is a schematic view of a cutting device according to the present invention before and after a cutting operation;
FIG. 6 is a schematic drawing showing the time-dependent tension of the drawing apparatus according to the present invention.
Description of reference numerals:
1-a clamping part; 11-a first clamping plate; 12-a second clamping plate; 1 a-a bump; 2-a flexible circuit board; 2 a-subblock; 2 b-blank block; 3-a cutting device; 31-a blade; 4-a drawing device; 4 a-a chuck; 5-a screw; 6-flexible screen body; 7-a connecting part.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a flexible screen body circuit board drawing force testing device, as shown in fig. 1 and fig. 3, and fig. 5, including a first clamping plate and a second clamping plate which are arranged opposite to each other, and a drawing device, wherein a chuck is arranged on the drawing device, and the drawing device is connected with a power device and can move relative to the first clamping plate.
In the testing process, the flexible screen body is clamped between the first clamping plate and the second clamping plate, and the chuck is used for drawing and testing the flexible circuit board connected to the flexible screen body. Through setting up first grip block and second grip block, the convenience presss from both sides tightly or dismantles the change action to the flexible screen body, and through the clamp of two grip blocks tightly simultaneously, prevents that the flexible screen body from crooked along with flexible circuit board, and then has avoided the screen body to damage, has improved efficiency of software testing. At the same time, the user can select the desired position,
in this embodiment, as shown in fig. 4, after the flexible screen body is clamped between the first clamping portion and the second clamping portion, all the connecting portions 7 on the flexible circuit board need to be exposed, and then the first clamping portion and the second clamping portion clamp the flexible screen body through the screws 5.
In this embodiment, as shown in fig. 1, a plurality of bumps 1a are disposed on the first clamping plate 11 at intervals, correspondingly, a plurality of sub-blocks 2a are cut on the flexible printed circuit board, the bumps 1a disposed at intervals are used for pressing the sub-blocks 2a, during the drawing process, the drawing device acts on the sub-block to be tested between the two bumps 1a, and the two bumps 1a are respectively pressed on two sides of the sub-block to be tested. The large flexible screen body is divided into a plurality of blocks, the whole is broken into parts, the required tension of the small flexible circuit board is synchronously reduced, the pulling force applied to the flexible screen body in the drawing process is synchronously reduced after the tension is reduced, and the flexible screen body is prevented from being damaged when being subjected to overlarge pulling force while the separation action between the flexible screen body and the flexible screen body is convenient to occur. Meanwhile, the convex blocks which are spaced from each other are arranged, so that the subblocks on two sides of the subblock to be tested can be prevented from tilting in the drawing test process, and the stability of the test process is improved.
In this embodiment, the bump 1a is formed by the following method:
and carrying out discontinuous cutting operation on a complete first clamping plate, and forming a blank area at the position after the cutting operation. After the cutting is finished, the bumps 1a are naturally formed between the two blank areas on the first clamping plate, and the formed bumps 1a are arranged at intervals. In this embodiment, the bump 1a formed by the cutting operation is itself disposed in a cube shape.
In this embodiment, the length of the bump 1a itself may completely cover the sub-block, or may partially cover the sub-block.
In this embodiment, each of the bumps 1a has the same size. As a modification, the size of the bump 1a may be adjusted, for example, in a plurality of bumps, the size of some bumps may be larger than the size of other bumps, and may be adjusted according to actual measurement conditions.
In this embodiment, the cut flexible circuit board and the cut flexible screen body can be placed between the first clamping plate and the second clamping plate, and the cut flexible circuit board that has not been cut can also be clamped. Therefore, in order to perform the cutting action after the completion of the holding action, a cutting device is separately provided in the present embodiment.
As shown in fig. 5, the cutting means comprises at least one blade 31. Through the motion of blade, can cut flexible circuit board, the motion route of blade can be adjusted according to drawing the action needs simultaneously to cut out the subblock of different sizes.
In this embodiment, in order to improve cutting efficiency, cutting device 3 includes the blade that a plurality of equidistant setting, through setting up a plurality of cutting device, can accomplish the synchronous cutting operation to a plurality of subblocks 2a when cutting operation once, and simultaneously, a plurality of subblocks are equidistant setting each other, make things convenient for the later stage to draw test work one by one to a plurality of subblocks, help improving holistic efficiency of software testing.
As a modification, the blades on the cutting device 3 may be disposed at unequal intervals, and a plurality of sub-blocks 2a with different sizes are formed on the flexible circuit board cut by the cutting device 3 at the same time, so that the flexibility of the drawing force test can be improved.
In this embodiment, the cutting device and the clamping portion are arranged in parallel to each other, so that the cutting device can be conveniently close to or far away from the clamping portion. Meanwhile, through the drawing device and the cutting device, the cutting and drawing integrated operation of the flexible circuit board can be realized, manual intervention is not needed, and the overall testing efficiency is greatly improved.
Meanwhile, in the embodiment, the length of the first clamping plate is smaller than that of the second clamping plate, and the cutting device is arranged in a space where the second clamping plate exceeds the first clamping plate, so that the integration and the compactness of the whole device are improved.
Meanwhile, in order to realize the drawing action and the cutting action, power devices are respectively connected to the cutting device and the drawing device and used for driving the cutting device and the drawing device to move, and the power devices are not shown in the figure. Specifically, the power device can be a motor, and a power arm is connected to the motor, so that the cutting device and the drawing device can be spatially moved. Simultaneously, for cooperating with power device, the flexible screen body circuit board pulling force testing arrangement that provides in this embodiment still includes controlling means, is used for controlling cutting device is right the cutting operation of flexible circuit board, and control pulling device is right the pulling operation of subblock.
In this embodiment, the drawing device is provided with a chuck, and the chuck is used for drawing each sub-block one by one. In particular, the collet acts on the end of the sub-block, by applying a certain clamping force to the sub-block, to ensure that the sub-block does not come out of the interior of the collet. During the test, the collet remains in contact with the sub-block until the test is completed.
In this embodiment, the plurality of bumps are arranged at equal intervals, and the distance between two adjacent blades is the same as the shortest distance between two adjacent bumps, that is, the sizes of the plurality of sub-blocks obtained by cutting are also the same. The arrangement mode can enable the subblocks to be arranged between every two adjacent convex blocks, the size of each subblock is the same, and the subblocks with the same size can improve the accuracy of measurement. Meanwhile, the two bumps act on two sides of the sub-block to be tested simultaneously, so that the two sides of the sub-block pressed by the bumps in the drawing process can be prevented from tilting or separating, and the stability of the drawing process is improved.
As a modification, when the sub-blocks 2a with different sizes need to be subjected to the pull-out test, the size of the bump 1a needs to be adaptively adjusted, and the distance between the two bumps is based on the actual width of the sub-block to be tested.
In this embodiment, in order to accurately measure the pulling force, a tension meter (not shown in the figure) is disposed on the pulling device, and the tension meter is configured to measure a force value when the flexible printed circuit board is separated from the flexible screen body. Through setting up the tensiometer, can feed back the pulling force between flexible circuit board and the flexible screen body to obtain accurate pulling force numerical value, thereby play the feedback effect to production technology. The measuring principle of the drawing force measuring device provided by the embodiment is as follows:
in the prior art, when testing a flexible screen body and a flexible circuit board, the following tension calculation formula is often adopted:
Ftensile value＝L*α
In the formula: alpha represents the ratio of the pulling force and L represents the width of the whole sub-block.
However, for the flexible screen body and the flexible circuit board, the flexible screen body has a greater flexibility, and if an external force is directly applied to the flexible screen body, the flexible screen body is not easily separated due to its flexibility. Meanwhile, when a whole flexible screen body is pulled, in order to pull the flexible circuit board and the flexible screen body, a large force is needed for pulling, and at the moment, a small flexible screen body at the position of the connecting part 7 is easily stripped from the flexible screen body together with the flexible circuit board, so that the flexible screen body is damaged.
Therefore, the method of cutting into small segments is adopted in the embodiment:
first, in the case where a plurality of sub-blocks 2a are set in equal size, the measurement principle of the drawing force measuring apparatus provided in the present embodiment is as follows:
Ftensile value＝FSub-tension value*(L/L1)＝(L1*α)*(L/L1)
In the formula: alpha represents the ratio of the tensile forces, as shown in FIG. 2, L1Representing the width of each sub-block and L representing the width of the entire sub-block. By dividing the flexible circuit board into a plurality of pieces, only F is measured during the measurementSub-tension valueBy measuring for many times, the accuracy of the whole drawing process can be improved, and F is obtainedSub-tension valueAnd multiplying the number by the final sub-block number to obtain a final number. In this example, FSub-tension valueIs necessarily less than FTensile valueTherefore, the condition that the whole flexible circuit board is broken in the drawing test process can be effectively prevented.
When a plurality of sub-blocks 2a with different sizes need to be measured, the following calculation method is adopted:
Ftensile value＝FSub-tension value*(L/Lx)＝(Lx*α)*(L/Lx)
For example, the length Lx and F of the sub-blocksTensile valueBecomes positively linearly dependent, when a sub-block of length Lx is tested, F is obtainedSub-tension valueAnd multiplying the value by L/Lx to obtain a final value. A plurality of FTensile valueAfter measurement, the final F is obtained by averaging themTensile value。
In this embodiment, data to be recorded may be selected according to actual requirements, for example, different test values Lx × α of subblocks of different sizes may be recorded, and a tensile value of the whole flexible printed circuit board obtained through derivation may also be recorded.
In this example, α is in the range of [0.6 to 0.8] N/mm. It should be noted that, in this embodiment, the force at the moment when the flexible circuit board is broken from the flexible screen body, that is, the force at the moment when the connecting portion is torn, is mainly measured.
Example 2
This embodiment is made on the basis of embodiment 1, in this embodiment, as shown in fig. 2, a blank block 2b is formed on the flexible circuit board 2 by the cutting device 3, that is, the cutting device 3 peels off part of the flexible circuit board 2 to form a blank block 2b, and the blank block 2b is disposed between two adjacent sub-blocks 2 a.
Unlike embodiment 1, in embodiment 1, the cutting means cuts a plurality of slits only in a single flexible circuit board, thereby dividing the single flexible circuit board into a plurality of small pieces. In the present embodiment, the cutting device directly digs a plurality of blank areas (blank blocks 2b) on the whole flexible circuit board, and there is no flexible circuit board between two adjacent sub-blocks.
The present embodiment is different from embodiment 1 in that the cutting means is a plurality of blades arranged in parallel with each other in embodiment 1. In this embodiment, the cutting device includes two vertical blades and a horizontal blade connected between the two vertical blades, the three blades form a group, and the whole cutting device is provided with multiple groups. In the test process, a group of blades firstly act on the flexible circuit board from top to bottom and give continuous pressure to the flexible circuit board, after the cutting is finished, the cutting device is separated from the flexible circuit board, and at the moment, a blank block 2b is formed on the flexible circuit board.
In this embodiment, the width of the bump 1a is the same as the width of the blank block 2 b. As a modification, the sizes of the plurality of sub-blocks 1a may also be different from each other, and at this time, the calculation is still performed using the formula provided in embodiment 1.
Example 3
The embodiment provides a method for testing the drawing force of a flexible screen body circuit board, which comprises the following steps:
cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks;
fixing the flexible screen body;
and an external force acts on the sub-block to perform drawing operation on the sub-block, and the force at the moment when the sub-block is separated from the flexible screen body is recorded.
The large flexible screen body is divided into a plurality of blocks, the whole is broken into parts, the required tension of the small flexible circuit board is synchronously reduced, the pulling force applied to the flexible screen body in the drawing process is synchronously reduced after the tension is reduced, and the flexible screen body is prevented from being damaged when being subjected to overlarge pulling force while the separation action between the flexible screen body and the flexible screen body is convenient to occur.
And simultaneously, in the step of cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks, the circuit board and the connecting part of the circuit board and the flexible screen body are cut along the cutting direction of the flexible circuit board. Through the cutting to connecting portion, cut into a plurality of independent fritters each other with connecting portion, drawing the in-process to the subblock, the connecting portion of adjacent subblock can not cause the interference to the connecting portion of the subblock that carries out the test, ensures to draw the stability of process.
In the testing process, as shown in fig. 4, two adjacent bumps 1a are respectively pressed on two sub-blocks 2a at two sides of the sub-block to be tested, so that in fig. 4, the sub-block 2a between the two bumps 1a and the connecting portion 7 between the sub-block 2a and the flexible screen body are completely exposed. In the drawing test process, the drawing device acts on the sub-block 2a which is not covered by the bump 1a, and the connecting part 7 connected with the sub-block 2a is exposed, so that the sub-block 2a is separated from the flexible screen body (the connecting part 7) under the continuous action of the drawing device.
The working process of the flexible screen body circuit board drawing force testing device provided in the embodiment is as follows, and the following description process adopts a flexible screen body without cutting and a flexible circuit board:
the cutting device is close to the flexible circuit board under the action of the power device, and the flexible circuit board is cut into a plurality of sub-blocks with the same size until the connecting part 7 is cut. After the cutting action is finished, the cutting device is far away from the flexible circuit board, then the chuck of the drawing device is started and close to the flexible circuit board under the action of the power device, the chuck clamps the sub-blocks, then the drawing operation is carried out on the sub-blocks arranged at intervals, and the tension meter continuously measures the force of the sub-blocks and the flexible screen body in the whole drawing process, as shown in fig. 6, and the time t is assumed. When the sub-block and the flexible screen body are instantaneously broken and the connecting part 7 is broken, the numerical value measured by the tension meter is rapidly reduced (from the numerical value a to the numerical value b), the numerical value on the left side of the breakpoint position is the tension value a to be measured, and the instantaneous force is recorded.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides a flexible screen body circuit board pulling force testing arrangement which characterized in that, flexible circuit board cuts out and has a plurality of subblocks (2a), and each subblock (2a) all is connected on the flexible screen body, testing arrangement includes:
a clamping portion (1) comprising a first clamping plate (11) and a second clamping plate (12) arranged opposite to each other, a flexible screen being adapted to be clamped between the first clamping plate (11) and the second clamping plate (12), the sub-block (2a) being adapted to be exposed outside the clamping portion (1);
the drawing device (4) is provided with a chuck, the drawing device (4) is connected with the power device and can move relative to the first clamping plate (11), and the drawing device (4) is suitable for drawing the sub-blocks (2 a).
2. The testing device according to claim 1, characterized in that the first clamping plate (11) and the second clamping plate (12) are connected by means of screws (5), and at least one of the first clamping plate (11) and the second clamping plate (12) is arranged fixed to itself.
3. A testing device according to claim 2, characterized in that a number of projections (1a) arranged at a distance from each other are arranged on the first clamping plate (11).
4. A testing device according to claim 3, further comprising a cutting device, wherein a power device for driving the cutting device (3) to move is connected to the cutting device (3), and the cutting device can move relative to the first clamping plate (11).
5. A test device according to claim 4, characterized in that the length of the first holding plate (11) is smaller than the length of the second holding plate (12), and the cutting device (3) is movably arranged in the space of the second holding plate (12) beyond the first holding plate (11).
6. A testing device according to claim 5, characterized in that the cutting device (3) comprises at least one blade (31).
7. The testing device according to claim 6, characterized in that several said projections (1a) are arranged equidistant from each other, and the distance between two adjacent said blades (31) is identical to the shortest distance between two adjacent said projections (1 a).
8. The testing device according to claim 1, characterized in that the pulling device (4) further comprises a load cell connected to the collet.
9. A method for testing the drawing force of a flexible screen body circuit board is characterized by comprising the following steps:
cutting the flexible circuit board to divide the flexible circuit board into at least two sub-blocks, wherein each sub-block is connected to the flexible screen body;
fixing the flexible screen body and the flexible circuit board on the testing device of any one of claims 1 to 8, so that the flexible screen body is clamped between the first clamping plate and the second clamping plate, and the sub-block is exposed out of the clamping part;
and an external force acts on the sub-block to perform drawing operation on the sub-block, and the force at the moment when the sub-block is separated from the flexible screen body is recorded.
10. The test method according to claim 9, wherein in the step of dividing the flexible circuit board into at least two sub-blocks by performing the cutting operation on the flexible circuit board, the circuit board and the connection portion of the circuit board and the flexible screen body are cut along a cutting direction of the flexible circuit board.
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| CN201910105811.0A CN109946154B (en) | 2019-02-01 | 2019-02-01 | Flexible screen body circuit board drawing force testing device and testing method |
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| CN201910105811.0A CN109946154B (en) | 2019-02-01 | 2019-02-01 | Flexible screen body circuit board drawing force testing device and testing method |
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