CN-121994622-A - Curl testing device

CN121994622ACN 121994622 ACN121994622 ACN 121994622ACN-121994622-A

Abstract

The application provides a curl test device, which relates to the technical field of flexible sheet test equipment and comprises a winding mechanism, a moving mechanism and a transmission mechanism, wherein the winding mechanism comprises a winding shaft capable of rotating around an axis of the winding mechanism and a first positioning structure, the first positioning structure is used for positioning one end of a flexible test sample on the winding shaft, the moving mechanism comprises a moving seat capable of moving along a set direction and a second positioning structure, the second positioning structure is used for positioning the other end of the flexible test sample on the moving seat, the transmission mechanism is respectively connected with the winding shaft and the moving seat, and is configured to drive the winding shaft and the moving seat to synchronously act in response to external driving force, and the moving distance of the moving seat is kept equal to the curl length or the extension length of the flexible test sample curled or extended relative to the winding shaft due to the rotation of the winding shaft. The application can avoid the problem that the flexible test sample is excessively tensioned or tilted in the test process.

Inventors

FENG XUE
PAN MENGZHONG
HE ZHIFENG
ZHOU HAOMIAO
Bao teng

Assignees

浙江清华柔性电子技术研究院
中国计量大学

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (12)

1. The curl testing device is characterized by comprising a winding mechanism, a moving mechanism and a transmission mechanism (5), wherein the winding mechanism comprises a winding shaft (1) capable of rotating around an axis of the winding mechanism and a first positioning structure (2) arranged on the winding shaft (1), and the first positioning structure (2) is used for positioning one end of a flexible test sample on the winding shaft (1); The moving mechanism comprises a moving seat (3) capable of moving along a set direction and a second positioning structure (4) arranged on the moving seat (3), the second positioning structure (4) is used for positioning the other end of the flexible test sample on the moving seat (3), and the set direction is perpendicular to the axial direction of the winding shaft (1); The transmission mechanism (5) is respectively connected with the winding shaft (1) and the movable seat (3), and the transmission mechanism (5) is configured to drive the winding shaft (1) and the movable seat (3) to synchronously act in response to an external driving force and enable the moving distance of the movable seat (3) to be kept equal to the winding length or the extending length of the flexible test sample which is curled or extended relative to the winding shaft (1) by rotating the winding shaft (1).
2. Curl test device according to claim 1, characterized in that the transmission mechanism (5) comprises a gear (50) and a rack (51) which are engaged with each other, the outer diameter of the gear (50) is equal to the outer diameter of the winding shaft (1), the gear (50) is coaxially arranged with the winding shaft (1) and is in key connection, and the length direction of the rack (51) is in the same direction as the set direction and is fixedly connected with the moving seat (3).
3. The curl testing device according to claim 2, further comprising a frame (6), wherein the frame (6) comprises a support column (60) and a slide rail (61), wherein the winding shaft (1) is rotatably arranged on the support column (60), and wherein the movable seat (3) is slidably engaged with the slide rail (61).
4. A curl testing device according to claim 3, characterized in that the support column (60) is provided with a plurality of rotation holes (600) in the height direction, the end of the winding shaft (1) is provided with a rotation shaft adapted to the rotation holes (600), and the winding shaft (1) is rotatably provided on the support column (60) by selectively inserting the rotation shaft into one rotation hole (600).
5. A curl testing device according to claim 3, characterized in that the transmission mechanism (5) further comprises a first connecting arm (52) and a second connecting arm (53), the first connecting arm (52) and the second connecting arm (53) are both slidably mounted on the slide rail (61), the movable seat (3) is disposed on the first connecting arm (52) and slidably cooperates with the slide rail (61) through the first connecting arm (52), and two ends of the rack (51) are fixedly mounted with the first connecting arm (52) and the second connecting arm (53), respectively.
6. Curl test device according to claim 5, characterized in that a lifting adjustment structure is provided between the mobile seat (3) and the first connecting arm (52), by means of which lifting adjustment structure the mobile seat (3) is selectively positioned at a desired height with respect to the first connecting arm (52).
7. The curl test device according to any of claims 1 to 6, characterized in that the first positioning structure (2) comprises a first fixing block (20) and a first pressing member, the first fixing block (20) is fixed on the winding shaft (1), the first pressing member comprises a first cambered surface pressing plate (21) and a first connecting portion (210) formed on the first cambered surface pressing plate (21), the first cambered surface pressing plate (21) is covered outside the winding shaft (1) and has the same curvature, and the first connecting portion (210) is connected with the first fixing block (20) through a screw so that the first cambered surface pressing plate (21) can press and position one ends of flexible test samples with different thicknesses on the winding shaft (1).
8. The curl testing device according to claim 7, wherein the first cambered surface pressing plate (21) is further formed with a limiting portion (211) at both ends in the axial direction of the winding shaft (1), and the limiting portion (211) is used for limiting one end of the flexible test sample in the axial direction of the winding shaft (1).
9. Crimping test device according to any of claims 1 to 6, wherein the second positioning structure (4) comprises a press block (40), the movable seat (3) being formed with a support surface (30), the press block (40) being connected with the support surface (30) by means of a screw so that the press block (40) can press and position the other ends of flexible test samples of different thicknesses on the support surface (30).
10. Curl test device according to any of claims 1 to 6, characterized in that it further comprises a power source and a control unit (7) for controlling the start and stop of the power source, which power source is connected to the transmission (5) and is adapted to apply the external driving force to the transmission (5).
11. The curl test device according to any of claims 2 to 6, characterized in that the transmission mechanism (5) further comprises a compensation assembly comprising a driving wheel (54), a driven wheel (55), a transmission belt (56), a connection block (57) and a balancing weight (58), both ends of the transmission belt (56) being fixedly connected with the driving wheel (54) and the balancing weight (58), respectively, and the transmission belt (56) being arranged between the driving wheel (54) and the driven wheel (55) by tensioning the balancing weight (58), the connection block (57) being fixedly connected to the transmission belt (56), and the connection block (57) being fixedly connected with the moving seat (3) or the rack (51); The thickness of the driving belt (56) is equal to that of the flexible test sample, the outer diameter of the driving wheel (54) is equal to that of the winding shaft (1), and the driving wheel (54) is configured to rotate around the axis thereof in response to an external driving force and drive the driving belt (56) to curl or stretch relative to the driving wheel (54) through the rotating action.
12. The curl test device according to claim 11, characterized in that the first positioning structure (2) comprises a first fixing block (20) and a first pressing member, the first fixing block (20) is fixed on the winding shaft (1), the first pressing member comprises a first cambered surface pressing plate (21) and a first connecting portion (210) formed on the first cambered surface pressing plate (21), the first cambered surface pressing plate (21) is covered outside the winding shaft (1) and has the same curvature, and the first connecting portion (210) is connected with the first fixing block (20) through a screw so that one end of flexible test samples with different thicknesses can be pressed and positioned on the winding shaft (1) by the first cambered surface pressing plate (21); The compensation assembly further comprises a second pressing part, the driving wheel (54) is provided with a connecting lug (540), the second pressing part comprises a second cambered surface pressing plate (59) and a second connecting part (590) formed on the second cambered surface pressing plate (59), the second cambered surface pressing plate (59) is covered outside the driving wheel (54) and has the same curvature, the thickness of the second cambered surface pressing plate (59) is equal to that of the first cambered surface pressing plate (21), and the second connecting part (590) is connected with the connecting lug (540) through a screw so that the second cambered surface pressing plate (59) can press and position one ends of driving belts (56) with different thicknesses on the driving wheel (54).

Description

Curl testing device Technical Field The invention relates to the technical field of flexible sheet testing equipment, in particular to a curl testing device. Background The structural members in some products are frequently curled in application, for example, flexible electronic products such as flexible conductive films, flexible sensors, flexible optoelectronic devices and the like which are widely used are increasingly obtained at present. The curl life and curl reliability of such flexible electronic products are one of the key properties for evaluating the quality of the products. Therefore, currently, a curl test device is generally used to perform curl test on such flexible electronic products, and the curl test device in the related art generally includes a winding shaft and a counterweight structure, two ends of a flexible test sample are respectively positioned on the winding shaft and the counterweight structure, and the winding shaft is driven to rotate forward and backward by a power source, so that the flexible test sample can curl and stretch relative to the winding shaft. In a general test, the required curl test data can be obtained by setting the degree of tension of the flexible test sample and the number of rotations and the rotation speed of the winding shaft. However, due to the weight structure, additional stress is generated on the flexible test sample in the test process, which easily causes the situation that the flexible test sample is excessively tensioned in the curling process or partially tilted in the stretching process, so that the accuracy of the curling test is affected. Disclosure of Invention Based on this, it is necessary to provide a curl test device for the problem that the existing curl test device easily causes excessive tensioning or tilting of the flexible test sample during the process of testing the flexible test sample. The curl testing device comprises a winding mechanism, a moving mechanism and a transmission mechanism, wherein the winding mechanism comprises a winding shaft capable of rotating around an axis of the winding mechanism and a first positioning structure arranged on the winding shaft, and the first positioning structure is used for positioning one end of a flexible test sample on the winding shaft; The moving mechanism comprises a moving seat capable of moving along a set direction and a second positioning structure arranged on the moving seat, the second positioning structure is used for positioning the other end of the flexible test sample on the moving seat, and the set direction is perpendicular to the axial direction of the winding shaft; The transmission mechanism is respectively connected with the winding shaft and the movable seat, and is configured to drive the winding shaft and the movable seat to synchronously act in response to an external driving force, and the moving distance of the movable seat is kept equal to the winding length or the stretching length of the flexible test sample which is curled or stretched relative to the winding shaft by rotating the winding shaft. In one embodiment, the transmission mechanism comprises a gear and a rack which are meshed with each other, the outer diameter of the gear is equal to the outer diameter of the winding shaft, the gear is coaxially arranged with the winding shaft and is in key connection with the winding shaft, and the length direction of the rack is in the same direction as the set direction and is fixedly connected with the movable seat. The gear and the rack are meshed for transmission, when one of the gear and the rack is driven by external driving force, the gear and the rack can synchronously act, and the rotation length of any point on the circumferential surface of the gear along the circumferential direction is equal to the movement length of any point on the rack along the set direction. Therefore, the winding shaft is driven to rotate through the gear, the moving seat is driven to move through the rack, and the moving distance of the moving seat can be kept equal to the curling length or the stretching length of the flexible test sample curled or stretched relative to the winding shaft due to the rotation of the winding shaft. In one embodiment, the curl testing device further comprises a frame, the frame comprises a support column and a slide rail, the winding shaft is rotatably arranged on the support column, and the movable seat is in sliding fit with the slide rail. The winding shaft and the movable seat can be conveniently arranged through the frame, the sliding direction of the movable seat can be limited through the sliding rail, and the stability of the movable seat in the movement along the set direction is improved. In one embodiment, the support column is provided with a plurality of rotating holes along the height direction, the end part of the winding shaft is provided with a rotating shaft matched with the rotating holes, and the winding shaft is selectively