A testing device for a curved surface capacitive touch screen

Abstract

The present invention is applicable to the field of testing instruments, and provides a testing device for a curved surface capacitive touch screen. The testing device includes a guide rail, an upper connecting member is fixedly connected to the upper side of the guide rail, both left and right ends of the lower side of the guide rail are connected with sliders through guide rail chutes, connecting blocks are fixedly connected to the lower ends of the two sliders, the two connecting blocks are connected by a straight rod and are both penetrated by the straight rod, a spring is sleeved on the straight rod, the left and right ends of the spring contact the left and right connecting blocks, a lower connecting member is fixedly connected below the connecting block, and a conductive cloth is fixedly connected to the lower end of the lower connecting member. By improving the existing testing instrument for a flat screen, the device is more suitable for testing a curved surface screen.

Description

Technical Field

[0001] The invention belongs to the field of testing instruments, and in particular relates to a testing device for a curved capacitive touch screen. Background Art

[0002] With the development of the screen industry, curved screens will increasingly become a new growth point in the industry. Flexible screens and curved screens will be used in more industries and scenarios. As a result, the detection problem of curved screens has become more and more prominent. Now flat screens still dominate the market, so the test instruments are also based on the test instruments of flat screens.

[0003] Most of today's screens are flat screens. When manufacturers are testing the screen, they only need to use multiple strands of conductive foam to press vertically downward at the same time. When the conductive foam is close to the screen surface, due to the electric field of the conductive foam, the conductive foam and the screen form a coupling capacitor. Because there is a high-frequency signal on the screen surface, the conductive foam absorbs a very small current. This current flows out from the electrodes on the four corners of the screen, and theoretically, the current flowing through the four electrodes is proportional to the distance from the conductive foam to the four corners. The controller calculates the position and pressure through precise calculation of the four current ratios.

[0004] However, if the new screen is a curved screen, this test method cannot guarantee that the conductive foam is pressed onto the screen surface with the same force perpendicular to the screen at the same time. Summary of the invention

[0005] The invention provides a testing device for a curved capacitive touch screen, aiming to solve the problem that screen testing instruments in the prior art are not suitable for testing curved screens.

[0006] The present invention is implemented as follows: a testing device for a curved capacitive touch screen comprises a guide rail, an upper connecting piece is fixedly connected to the upper side of the guide rail, sliders are connected to the left and right ends of the lower side of the guide rail through guide rail grooves, connecting blocks are fixedly connected to the lower ends of the two sliders, the two connecting blocks are connected by a straight rod and are penetrated by the straight rod, a spring is sleeved on the straight rod, the left and right ends of the spring contact the left and right connecting blocks, a lower connecting piece is fixedly connected to the lower side of the connecting block, and a conductive cloth is fixedly connected to the lower end of the lower connecting piece.

[0007] Furthermore, the upper connecting piece is in a "cross"-shaped structure, and a hole is opened at the upper end of the upper connecting piece.

[0008] Furthermore, side blocks are fixedly provided at both ends of the upper connecting member. The side blocks are rectangular structures. Holes are opened on the sides of the side blocks away from the upper connecting member to facilitate bolt installation. The lower surface of the side block is on the same horizontal plane as the lower surface of the slider.

[0009] Furthermore, the upper end part of the lower connecting piece is of a "T" shape, and the upper surface area of the lower connecting piece is equal to the lower surface area of the slider and they are arranged in a fitting manner; the lower end part of the lower connecting piece is of an "L" shape and a strip-shaped pressing plate is fixedly connected to the side far away from the straight rod at the lower end of the lower connecting piece, and the pressing plate is fixedly connected to the lower connecting piece through bolts.

[0010] Furthermore, the two lower connecting pieces are arranged in a mirror image, and the lower end part of the lower connecting piece is of an "L" shape because.

[0011] Furthermore, a connecting plate is fixedly connected to the lower surfaces of the two lower connecting pieces, the connecting plate is arranged parallel to the lower surfaces of the lower connecting pieces, and a conductive foam is fixedly connected to the lower surface of the connecting plate.

[0012] The beneficial effects achieved by the present invention: Through the connection settings among the guide rail, the slider, the connecting block, the lower connecting piece and the conductive cloth, the slider can move horizontally away from the straight rod under the drive of the left and right conductive cloths; through the connection settings among the slider, the straight rod and the spring, when the spring returns to its original state, it pushes the slider to move, and then one end of the conductive cloth moves away from the straight rod under the action of the spring force to reset, so that the conductive cloth returns to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of a test device for a curved surface capacitive touch screen provided by the present invention;

[0014] Figure 2 is the side view of a test device for a curved surface capacitive touch screen provided by the present invention;

[0015] Figure 3 is the structural schematic diagram of the upper connecting piece of a test device for a curved surface capacitive touch screen provided by the present invention.

[0016] In the figure: 1 - upper connecting piece; 2 - side stopper; 3 - slider; 4 - guide rail; 5 - connecting block; 6 - straight rod; 7 - spring; 8 - lower connecting piece; 9 - pressing plate; 10 - conductive cloth; 11 - conductive foam; 12 - connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Such as Figures 1-3As shown in the figure, a test device for a curved surface capacitive touch screen includes a guide rail 4. An upper connecting member 1 is fixedly connected to the upper side of the guide rail 4. Both the left and right ends of the lower side of the guide rail 4 are connected to sliders 3 through guide rail chutes. A connecting block 5 is fixedly connected to the lower end of each of the two sliders 3. The two connecting blocks 5 are connected by a straight rod 6 and are both penetrated by the straight rod 6. A spring 7 is sleeved on the straight rod 6. When the spring 7 is in a free state, its left and right ends contact the left and right connecting blocks 5. A lower connecting member 8 is fixedly connected to the lower part of the connecting block 5. A conductive cloth 10 is fixedly connected to the lower end of the lower connecting member 8. Through the connection settings among the guide rail 4, the sliders 3, the connecting blocks 5, the lower connecting member 8 and the conductive cloth 10, the conductive cloth 10 can move horizontally close to the straight rod 6 under the drive of the left and right sliders 3; through the connection settings among the sliders 3, the straight rod 6 and the spring 7, one end of the conductive cloth 10 is reset away from the straight rod 6 under the elastic force of the spring 7, so that the conductive cloth 10 returns to its original position. When the device moves downward, since the object to be measured (curved screen) is curved and the conductive cloth 10 is flexible, when the device continues to move downward, the conductive cloth 10 contacts the curved screen and is subjected to a force. This force causes the two connecting blocks 5 to squeeze the spring 7 inward, and the conductive cloth 10 gradually wraps the curved screen.

[0019] The upper connecting member 1 has a "cross" - shaped structure. A hole is opened at the upper end of the upper connecting member 1 for bolt installation.

[0020] Side stop blocks 2 are fixedly arranged at both the left and right ends of the upper connecting member 1. The side stop blocks 2 have a cuboid structure. A hole is opened on the side surface of the side stop block 2 far from the upper connecting member 1 for bolt installation. The lower surface of the side stop block 2 is on the same horizontal plane as the lower surface of the slider 3. The side stop blocks 2 are used to limit the sliders 3.

[0021] The upper part of the lower connecting member 8 has a "T" - shaped structure. The area of the upper surface of the lower connecting member 8 is equal to the area of the lower surface of the slider 3 and they are arranged in a fitting manner; the lower part of the lower connecting member 8 has an "L" - shaped structure and a plate - shaped pressing plate 9 is fixedly connected to the side of the lower end of the lower connecting member 8 far from the straight rod 6. The pressing plate 9 is fixedly connected to the lower connecting member 8 by bolts. The pressing plate 9 is used to fix the conductive cloth 10 to the lower connecting member 8.

[0022] The two lower connecting members 8 are arranged in a mirror image. The lower part of the lower connecting member 8 has an "L" - shaped structure, so the sliders 3 can be limited. When the distance between the left and right sliders 3 is too close, the left and right lower connecting members 8 block each other, and thus the left and right sliders 3 cannot get closer.

[0023] Two lower connectors 8 are fixedly connected to a connecting plate 12 on the lower surface. The connecting plate 12 is arranged parallel to the lower surface of the lower connector 8. A conductive foam 11 is fixedly connected to the lower surface of the connecting plate 12. The conductive foam 11 is used for positioning the curved screen. When the curved screen is subjected to a screen test, the conductive foam 11 is kept directly above the center of the curved screen. One end of a conductive cloth 10 is connected to the lower surface of the conductive foam 11, and the left and right lower connectors 8 together complete the fixed connection of the conductive cloth 10.

[0024] The specific working principle of the present invention: Before use, this device is arranged above the curved screen to be tested, and the conductive foam 11 is kept directly above the center of the curved screen. Under the action of an external force, this device continuously moves towards the curved screen to be tested until the curved screen is completely covered by the conductive cloth 10. At this time, the slider 3 is pulled by the conductive cloth 10 and moves towards the side close to the spring 7. The conductive cloth 10 absorbs the smaller current on the curved screen. The controller measures and calculates the absorbed smaller current, and then obtains the screen test result of the curved screen. After the screen test is completed, this device rises under the action of an external force, and the spring 7 returns to its free state, driving the slider 3 and the conductive cloth 10 to reset.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A test device for a curved surface capacitive touch screen, characterized in that, it includes a guide rail, an upper connecting member is fixedly connected to the upper side of the guide rail, both left and right ends of the lower side of the guide rail are connected with sliders through guide rail chutes, both lower ends of the two sliders are fixedly connected with connecting blocks, the two connecting blocks are connected by a straight rod and both are penetrated by the straight rod, a spring is sleeved on the straight rod, the left and right ends of the spring contact the left and right connecting blocks respectively, lower connecting members are fixedly connected below the connecting blocks, and a conductive cloth is fixedly connected to the lower ends of the lower connecting members; The upper part of the lower connecting member is of a "T" - shaped structure, the upper surface area of the lower connecting member is equal to the lower surface area of the slider and they are arranged in a fitting manner; the lower part of the lower connecting member is of an "L" - shaped structure and a plate - shaped pressing plate is fixedly connected to the side far from the straight rod at the lower end of the lower connecting member, and the pressing plate is fixedly connected to the lower connecting member by bolts; The lower surfaces of the two lower connecting members are fixedly connected with a connecting plate, the connecting plate is arranged parallel to the lower surface of the lower connecting member, a conductive foam is fixedly connected to the lower surface of the connecting plate, and one end of the conductive cloth is connected to the lower surface of the conductive foam.

2. The test device for a curved surface capacitive touch screen according to claim 1, characterized in that, the upper connecting member is of a "cross" - shaped structure, and a hole is opened at the upper end of the upper connecting member.

3. The test device for a curved surface capacitive touch screen according to claim 1, characterized in that, side stop blocks are fixedly arranged at both left and right ends of the upper connecting member, the left and right side stop blocks are of a cuboid structure, holes are opened on the side far from the upper connecting member of the side stop blocks, and the lower surface of the side stop blocks is on the same horizontal plane as the lower surface of the slider.

4. The test device for a curved surface capacitive touch screen according to claim 1, characterized in that, the two lower connecting members are arranged in a mirror image.

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