Electrical property testing device for COF packaging

Abstract

The invention belongs to the technical field of circuit board testing, and particularly relates to a COF packaging electrical property testing device which comprises an electrical property testing box body, a longitudinal moving mechanism, a transverse moving mechanism and an adsorption mechanism, a negative pressure state is manufactured through an air pump, stable adsorption and fixation of a COF packaging circuit board are achieved, an air channel sliding block and a sliding block air hole are communicated through the negative pressure state, and therefore the COF packaging circuit board can be stably adsorbed and fixed. The transmission impeller and the transmission fluted disc are pushed by airflow of the air pump to rotate, rotation operation of the adsorption plate is achieved, forward rotation inner teeth and a reverse rotation fluted disc are designed on the transmission fluted disc, full-tooth meshing transmission is formed between the transmission fluted disc and the driven gear, the COF packaging circuit board is twisted firstly and then reset, then electrical testing is conducted, and the stress condition in actual use is simulated; the COF packaging circuit board with qualified electrical performance and the COF packaging circuit board with unqualified electrical performance are separated by using the first blanking conveyor belt and the second blanking conveyor belt, so that the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit board testing, and in particular relates to an electrical property testing device for COF packaging. Background Art

[0002] During the production process of COF packaged circuit boards, it is inevitable that short circuits, open circuits, leakage and other electrical defects may occur due to external factors. Therefore, electrical test fixtures are required to conduct power-on tests before shipment, and conduct continuity tests by contacting the test points of the flexible circuit board with micro-needles. In actual applications, COF packaged circuit boards may experience twisting or bending. Existing test devices cannot simulate such operations and cannot evaluate the electrical performance of circuit boards after twisting. Moreover, due to the bendability of COF circuit boards, traditional test devices may not be able to ensure that the test needles always have good contact with the test points on the circuit board. Therefore, there is a need for an electrical testing device for COF packaging to solve the technical problems in the prior art that the electrical performance of the circuit board in a twisted state cannot be evaluated and that the circuit board cannot always have good contact with the test points after being twisted. Summary of the invention

[0003] The present invention overcomes the shortcomings of the prior art and provides an electrical testing device for COF packaging. An air pump is used to create a negative pressure state to achieve stable adsorption and fixation of the COF packaged circuit board. At the same time, the negative pressure state is used to make the airway slider and the slider air holes conductive, and the airflow of the air pump is used to drive the transmission impeller and the transmission gear plate to rotate. The positive internal teeth and the reverse gear plate are cleverly designed on the transmission gear plate to form a full-tooth meshing transmission with the driven gear, so that the COF packaged circuit board is first subjected to a twist reset operation and then an electrical test is performed to ensure that the test needle is always in good contact with the test point on the circuit board to evaluate the electrical performance of the circuit board after being twisted.

[0004] The technical solution adopted by the present invention is as follows: This solution provides an electrical testing device for COF packaging, including an electrical testing box, a longitudinal movement mechanism and a transverse movement mechanism. A feeding conveyor belt is penetrated on one side of the electrical testing box, and a first unloading conveyor belt and a second unloading conveyor belt are arranged in an array on the other side of the electrical testing box to automatically transport the COF packaged circuit board to complete the loading and unloading process. An electrical testing needle holder is fixedly provided on the inner wall of the electrical testing box, and an electrical testing needle body is fixedly provided on the electrical testing needle holder for contacting the electrical testing point of the COF packaged circuit board to perform electrical testing to ensure that the circuit board functions normally. The transverse movement mechanism is fixedly installed on the inner top wall of the electrical testing box, and an installation box is fixedly provided on the action end of the transverse movement mechanism, and a side wall of the installation box is fixed An air pump is provided, and the longitudinal movement mechanism is fixedly installed on the side wall of the electrical measurement box body, and the action end of the longitudinal movement mechanism is fixedly connected to the side wall of the installation box. The longitudinal movement mechanism and the transverse movement mechanism are both fixedly connected to the air outlet of the air pump through a pipeline. A wind hood is symmetrically fixed on the installation box to provide a closed space for protecting and guiding the airflow. A transmission mechanism is nested in the inner cavity of the wind hood to drive the twisting and resetting operation of the adsorption mechanism to ensure that the circuit board is twisted first and then restored to its original state before and after testing. The end of the wind hood away from the installation box is rotatably connected to the adsorption mechanism, which adsorbs the COF packaged circuit board through negative pressure to maintain its stability during the test, and the adsorption mechanism is fixedly connected to the air suction port of the air pump through a pipeline.

[0005] Furthermore, the transmission mechanism includes a transmission gear plate and a driven gear; the transmission gear plate is rotatably connected to the wind hood, and an impeller shaft is coaxially fixedly provided at one end of the transmission gear plate close to the installation box, and a transmission impeller is fixedly provided in a circumferential array on the circumferential wall of the impeller shaft. The transmission gear plate is rotated by the driving of the airflow, and a transmission groove is opened at the end of the transmission gear plate away from the installation box, and forward rotating internal teeth are fixedly provided on the circumferential wall of the transmission groove, and a reverse gear plate is coaxially fixed in the transmission groove to realize forward and reverse rotation, and the driven gear is rotatably connected to the inner wall of the wind hood, and the driven gear forms a full-tooth meshing transmission with the forward rotating internal teeth and the reverse gear plate to realize the twisting and resetting operation of the adsorption mechanism.

[0006] Furthermore, the adsorption mechanism includes a transmission shaft, an exhaust pipe and an adsorption plate; the transmission shaft is passed through the side wall of the air hood away from the mounting box, one end of the transmission shaft is fixedly connected to the driven gear, the circumferential wall of the exhaust pipe is fixedly connected to the other end of the transmission shaft, an airway switching component is fixedly provided on the circumferential wall of the exhaust pipe, an air outlet of the airway switching component is fixedly connected to the circumferential wall of the air hood by a pipe through-type, an air inlet of the airway switching component is fixedly connected to the air pump by a pipe through-type, for controlling the direction of the airflow and regulating the conduction and blockage of the airflow in the air hood; the adsorption plate is fixedly connected to the bottom end of the exhaust pipe, and an adsorption air hole which is through-connected to the exhaust pipe is provided at the bottom end of the adsorption plate.

[0007] Furthermore, the airway switching assembly includes a switching airway, a sliding ring plate, a fixed ring plate and a return spring; the switching airway is fixedly arranged on the circumferential wall of the exhaust pipe, the inner cavity of the switching airway is communicated with the inner cavity of the exhaust pipe, the side wall of the switching airway is fixedly connected to the air outlet of the air pump by a pipe through-type, the other side wall of the switching airway is fixedly connected to the wind hood by a pipe through-type, the wind hood and the air outlet of the air pump are arranged facing each other at the connecting position of the switching airway, the sliding ring plate is slidably engaged with the inner wall of the exhaust pipe, an airway slider is fixedly arranged on the circumferential wall of the sliding ring plate, a slider air hole is penetrated on the airway slider, the airway slider is slidably connected to the inner wall of the switching airway, the fixed ring plate is fixedly arranged on the inner wall of the exhaust pipe, and the two ends of the return spring are respectively fixedly connected to the sliding ring plate and the fixed ring plate.

[0008] Furthermore, a baffle is fixedly provided on the inner circumferential wall of the wind cover, and a limit plate is fixedly provided on the side wall of the transmission gear disc close to the mounting box to limit the rotation angle of the transmission gear disc and prevent excessive rotation. A rotating groove is opened at one end of the impeller shaft close to the mounting box, and a rotating spring is nested in the rotating groove. A spring fixing shaft coaxial with the rotating groove is fixedly provided on the mounting box, and two ends of the rotating spring are respectively fixedly connected to the inner wall of the rotating groove and the circumferential wall of the spring fixing shaft, so as to make the transmission gear disc rotate in the opposite direction to prepare for the next operation and realize automatic resetting of the transmission mechanism.

[0009] Furthermore, the longitudinal movement mechanism includes a longitudinal rail, a longitudinal movement slider, and a longitudinal movement cylinder; the longitudinal rail is fixedly arranged on the inner wall of the electrical measurement box to provide a sliding path for the longitudinal movement slider, the longitudinal movement slider is slidably engaged on the longitudinal rail, the longitudinal movement cylinder is fixedly arranged at the bottom end of the longitudinal rail, and the piston rod end of the longitudinal movement cylinder is fixedly connected to the top end of the installation box to realize the vertical movement of the installation box.

[0010] Furthermore, the transverse movement mechanism includes a transverse rail, a transverse movement slider and a transverse movement cylinder; the transverse rail is fixedly arranged on the inner top wall of the electrical measurement box to provide a sliding path for the transverse movement slider, the transverse movement slider is slidably engaged on the transverse rail, the transverse movement cylinder is fixedly arranged at the end of the transverse movement slider away from the transverse rail, the piston rod end of the transverse movement cylinder is fixedly connected to the end of the installation box close to the transverse rail to realize horizontal movement of the installation box.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows: (1) A negative pressure state is created by an air pump to achieve stable adsorption and fixation of the COF packaged circuit board. At the same time, the negative pressure state is used to make the airway slider and the slider air hole conductive, and then the airflow of the air pump is used to drive the transmission impeller and the transmission gear plate to rotate. The transmission gear plate is designed with positive internal teeth, which mesh with the driven gear to achieve the rotation operation of the adsorption plate. The COF packaged circuit board after adsorption and fixation is first twisted and then electrically measured to simulate the force conditions in actual use, so as to evaluate the electrical performance of the circuit board after twisting; (2) At the same time, a reverse gear is cleverly designed on the transmission gear. The forward internal teeth and the reverse gear form a full-tooth meshing transmission with the driven gear, realizing the twisting and resetting operation of the adsorption mechanism. After the COF package circuit board is twisted, it can be reversely rotated and reset before electrical testing, ensuring that the test needle is always in good contact with the test point on the circuit board. (3) Through the design of the baffle and the limit plate, it is ensured that under the action of the airflow, after the transmission gear disk rotates one circle, the limit plate and the baffle collide with each other to limit the rotation angle of the transmission gear disk and prevent excessive rotation. At the same time, the return spring is used to drive the transmission gear disk to rotate in the opposite direction when the COF package circuit board is unloaded, so as to realize the automatic reset of the transmission mechanism; (4) The first unloading conveyor belt and the second unloading conveyor belt are used to separate the COF packaged circuit boards with qualified electrical performance from the circuit boards with unqualified electrical performance. For the products with unqualified electrical performance, they can be removed from the production process, avoiding the unqualified products from entering the next link, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of an electrical property testing device for COF packaging proposed by the present invention; Figure 2 A schematic diagram of the internal structure of an electrical property testing device for COF packaging proposed by the present invention; Figure 3 This is a schematic diagram of the installation structure of the adsorption mechanism proposed by the present invention; Figure 4 This is a schematic diagram of the internal structure of the adsorption mechanism and the transmission mechanism proposed by the present invention; Figure 5 The structure diagram of the transmission mechanism proposed by the present invention is as follows Figure 1 ; Figure 6 This is a schematic diagram of the structure of the air extraction pipeline and the switching airway proposed by the present invention; Figure 7 The structure diagram of the transmission mechanism proposed by the present invention is as follows Figure 2 ; Figure 8 for Figure 7 A partial enlarged view of the middle part; Fig. 9This is a schematic diagram of the structure of the baffle and the limit plate in the conflicting state proposed by the present invention.

[0013] Among them, 1. Electric measuring box, 11. Air pump, 12. Feeding conveyor belt, 13. First unloading conveyor belt, 14. Second unloading conveyor belt, 15. Electric measuring needle seat, 16. Electric measuring needle body, 2. Longitudinal movement mechanism, 21. Longitudinal track, 22. Longitudinal movement slider, 23. Longitudinal movement cylinder, 3. Transverse movement mechanism, 31. Transverse track, 32. Transverse movement slider, 33. Transverse movement cylinder, 4. Adsorption mechanism, 41. Drive shaft, 42. Exhaust pipe, 43. Adsorption plate, 44. Airway switching component, 441. Cut Air exchange duct, 442, sliding ring plate, 443, fixed ring plate, 444, return spring, 446, air duct slider, 447, slider air hole, 45, adsorption air hole, 5, installation box, 6, wind cover, 61, baffle, 62, limit plate, 63, rotating groove, 64, rotating strip, 65, fixed shaft, 7, transmission mechanism, 71, transmission gear plate, 72, driven gear, 711, impeller shaft, 712, transmission impeller, 713, transmission groove, 714, forward internal teeth, 715, reverse gear plate.

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] Example 1: Please refer to Figure 1-Figure 7 , Fig. 9The present embodiment provides an electrical property testing device for COF packaging, comprising an electrical test box 1, a longitudinal movement mechanism 2 and a transverse movement mechanism 3. A feeding conveyor belt 12 is provided on one side of the electrical test box 1, and a first unloading conveyor belt 13 and a second unloading conveyor belt 14 are arranged in an array on the other side of the electrical test box 1. An electrical test needle seat 15 is fixedly provided on the inner wall of the electrical test box 1, and an electrical test needle body 16 is fixedly provided on the electrical test needle seat 15. The transverse movement mechanism 3 is fixedly installed on the inner top wall of the electrical test box 1, and an installation box 5 is fixedly provided on the active end of the transverse movement mechanism 3, and an air pump 11 is fixedly provided on the side wall of the installation box 5. The longitudinal movement mechanism 2 is fixedly installed on the side wall of the electrical test box 1, and the active end of the longitudinal movement mechanism 2 is fixedly connected to the side wall of the installation box 5. The longitudinal movement mechanism 2 and the transverse movement mechanism 3 are both fixedly connected to the air outlet of the air pump 11 by means of a pipeline through-type, a wind hood 6 is symmetrically fixedly provided on the installation box 5, a transmission mechanism 7 is nested in the inner cavity of the wind hood 6, the end of the wind hood 6 away from the installation box 5 is rotatably connected with the adsorption mechanism 4, the adsorption mechanism 4 is fixedly connected to the air suction port of the air pump 11 by means of a pipeline through-type; the transmission mechanism 7 includes a transmission gear plate 71 and a driven gear 72; the transmission gear plate 71 is rotatably connected to the wind hood 6, the end of the transmission gear plate 71 close to the installation box 5 is coaxially fixed with an impeller shaft 711, and a transmission impeller 712 is fixedly provided in a circumferential array on the circumferential wall of the impeller shaft 711, the transmission gear plate 71 is driven to rotate under the action of the airflow, and the transmission gear plate 71 is away from the installation box 5. A transmission groove 713 is provided at one end of the packaging box 5, and a forward internal tooth 714 is fixed on the circumferential wall of the transmission groove 713, and a reverse toothed disc 715 is coaxially fixed in the transmission groove 713. The driven gear 72 is rotatably connected to the inner wall of the wind cover 6, and the driven gear 72 forms a full-tooth meshing transmission with the forward internal tooth 714 and the reverse toothed disc 715, so that the driven gear 72 rotates forward first and then rotates reversely to complete the reset operation of the COF packaged circuit board; the adsorption mechanism 4 includes a transmission shaft 41, an exhaust pipe 42 and an adsorption plate 43; the transmission shaft 41 is penetrated on the side wall of the wind cover 6 away from the installation box 5, one end of the transmission shaft 41 is fixedly connected to the driven gear 72, and the circumferential wall of the exhaust pipe 42 is connected to the other end of the transmission shaft 41 One end is fixedly connected, an airway switching component 44 is fixedly provided on the circumferential wall of the air extraction pipe 42, an air outlet of the airway switching component 44 is fixedly connected to the circumferential wall of the wind hood 6 by a pipe through-type, and an air inlet of the airway switching component 44 is fixedly connected to the air pump 11 by a pipe through-type; an adsorption plate 43 is fixedly connected to the bottom end of the air extraction pipe 42, an adsorption air hole 45 is provided at the bottom end of the adsorption plate 43 and is in through-type communication with the air extraction pipe 42, after the bottom end of the adsorption plate 43 contacts the COF packaged circuit board, the adsorption air hole 45 is blocked, forming a negative pressure state to fix the COF packaged circuit board; the airway switching component 44 includes a switching airway 441, a sliding ring plate 442, a fixed ring plate 443 and a reset spring 444;The switching airway 441 is fixedly arranged on the circumferential wall of the exhaust pipe 42, the inner cavity of the switching airway 441 is communicated with the inner cavity of the exhaust pipe 42, the side wall of the switching airway 441 is fixedly connected to the air outlet of the air pump 11 by a pipe through-type, the other side wall of the switching airway 441 is fixedly connected to the wind hood 6 by a pipe through-type, the wind hood 6 and the air outlet of the air pump 11 are arranged opposite to each other at the communicating position of the switching airway 441, the sliding ring plate 442 is slidably engaged with the inner wall of the exhaust pipe 42, an airway slider 446 is fixedly arranged on the circumferential wall of the sliding ring plate 442, the airway slider 446 is penetrated by a slider air hole 447, the airway slider 446 is slidably connected to the inner wall of the switching airway 441, the air pump 11 is used to form a negative pressure state in the exhaust pipe 42, the sliding ring plate 442 and the airway slider 446 slide upward under the action of the negative pressure, and the slider air hole 447 conducts the pipes fixedly connected through the two side walls of the switching airway 441 , the fixed ring plate 443 is fixedly arranged on the inner wall of the exhaust pipe 42, and the two ends of the return spring 444 are fixedly connected to the sliding ring plate 442 and the fixed ring plate 443 respectively; the longitudinal movement mechanism 2 includes a longitudinal track 21, a longitudinal movement slider 22, and a longitudinal movement cylinder 23; the longitudinal track 21 is fixedly arranged on the inner wall of the electric measuring box 1, the longitudinal movement slider 22 is slidably engaged on the longitudinal track 21, the longitudinal movement cylinder 23 is fixedly arranged at the bottom end of the longitudinal track 21, and the piston rod end of the longitudinal movement cylinder 23 is fixedly connected to the top of the installation box 5; the transverse movement mechanism 3 includes a transverse track 31, a transverse movement slider 32 and a transverse movement cylinder 33; the transverse track 31 is fixedly arranged on the inner top wall of the electric measuring box 1, the transverse movement slider 32 is slidably engaged on the transverse track 31, the transverse movement cylinder 33 is fixedly arranged at the end of the transverse movement slider 32 away from the transverse track 31, and the piston rod end of the transverse movement cylinder 33 is fixedly connected to the end of the installation box 5 close to the transverse track 31. ;

[0017] In this embodiment, the COF packaged circuit board is transported to the lower side of the adsorption mechanism 4 by the feeding conveyor belt 12, and the piston rod of the longitudinal cylinder 23 is used to push the installation box 5 downward to the upper side of the COF packaged circuit board. After the air pump 11 is started, a negative pressure state is formed in the inner cavity of the exhaust pipe 42, and the adsorption plate 43 adsorbs and fixes the COF packaged circuit board through the adsorption air holes 45. After adsorption and fixation, the piston rod of the longitudinal cylinder 23 drives the COF packaged circuit board to move upward, and the piston rod of the transverse cylinder 33 pushes the COF packaged circuit board to move. To the upper side of the electric measuring needle body 16, during the displacement process, the inner cavity of the air extraction pipeline 42 is in a negative pressure state, the sliding ring plate 442 slides upward under the action of the negative pressure, the reset spring 444 is compressed, and the sliding ring plate 442 drives the airway slider 446 to move upward, and the slider air hole 447 is connected to the pipeline fixedly connected to the two side walls of the switching airway 441, and the air flow blown out of the air outlet of the air pump 11 passes through the slider air hole 447 to the inner cavity of the wind cover 6. After the transmission impeller 712 is driven by the air flow, the transmission gear plate 71 is driven to rotate clockwise, The positive internal teeth 714 first mesh with the driven gear 72. At this time, the driven gear 72 and the transmission shaft 41 rotate forward, that is, the air extraction pipe 42 and the adsorption plate 43 rotate forward, so as to complete the twisting operation of the COF packaged circuit board. After the positive internal teeth 714 finish meshing with the driven gear 72, the reverse gear plate 715 meshes with the driven gear 72. At this time, the driven gear 72 and the transmission shaft 41 rotate in the opposite direction, that is, the air extraction pipe 42 and the adsorption plate 43 rotate in the opposite direction, so as to complete the reset operation of the COF packaged circuit board. After the OF packaged circuit board is reset, the piston rod of the longitudinal movement cylinder 23 is used to push the installation box 5 downward, so that the electrical measuring point of the COF packaged circuit board contacts the electrical measuring needle 16, and the electrical test of the COF packaged circuit board is completed. After the conductivity is successful, the piston rod of the longitudinal movement cylinder 23 drives the COF packaged circuit board to move upward, and the piston rod of the transverse movement cylinder 33 pushes the COF packaged circuit board to move to the upper side of the first unloading conveyor belt 13. After the air pump 11 stops pumping air, the COF packaged circuit board falls to the first unloading conveyor belt 13 for unloading.

[0018] Embodiment 2: This embodiment is based on the above embodiment, except that Figure 3-Figure 7 A baffle 61 is fixedly provided on the inner circumferential wall of the wind cover 6, a limit plate 62 is fixedly provided on the side wall of the transmission gear disc 71 close to the installation box 5, a rotating groove 63 is opened at one end of the impeller shaft 711 close to the installation box 5, a rotating spring 64 is nested in the rotating groove 63, a spring fixing shaft 65 coaxial with the rotating groove 63 is fixedly provided on the installation box 5, and both ends of the rotating spring 64 are fixedly connected to the inner wall of the rotating groove 63 and the circumferential wall of the spring fixing shaft 65 respectively.

[0019] After the transmission impeller 712 is driven by the airflow, the transmission gear disc 71 is driven to rotate forward one circle, and the limit plate 62 conflicts with the baffle 61. Under the continuous action of the airflow, the recirculation strip 64 remains in a stretched state, and the transmission gear disc 71 stops rotating, thereby preventing the exhaust pipe 42 and the adsorption plate 43 from rotating repeatedly, and preventing the electrical measurement point of the COF packaged circuit board from not contacting or having poor contact with the electrical measurement needle body 16. After the electrical measurement is completed, the air pump 11 stops pumping air, and the negative pressure state in the exhaust pipe 42 disappears, the reset spring 444 resets, the sliding ring plate 442 and the airway slider 446 move downward, and the slider air hole 447 cuts off the pipeline connected by the through-type connection on both side walls of the switching airway 441, and the airflow in the wind cover 6 disappears. The recirculation strip 64 resets, driving the transmission gear disc 71 to rotate in the opposite direction for one circle, and then the next COF packaged circuit board distortion reset operation can be continued.

[0020] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An electrical property testing device for COF packaging, comprising an electrical testing box (1), a longitudinal movement mechanism (2) and a transverse movement mechanism (3), wherein the longitudinal movement mechanism (2) is fixedly mounted on a side wall of the electrical testing box (1), and the transverse movement mechanism (3) is fixedly mounted on an inner top wall of the electrical testing box (1), characterized in that: An electric measuring needle seat (15) is fixedly provided on the inner wall of the electric measuring needle seat (15), and an electric measuring needle body (16) is fixedly provided on the electric measuring needle seat (15). An action end of the transverse movement mechanism (3) is fixedly provided with a mounting box (5), and an action end of the longitudinal movement mechanism (2) is fixedly connected to a side wall of the mounting box (5). An air pump (11) is fixedly provided on the top wall of the mounting box (5). Both the longitudinal movement mechanism (2) and the transverse movement mechanism (3) are fixedly connected to an air outlet of the air pump (11) via a pipeline through-type. An air hood (6) is symmetrically fixedly provided on the mounting box (5), and a transmission mechanism (7) is nested in an inner cavity of the air hood (6). An end of the air hood (6) away from the mounting box (5) is rotatably connected to an adsorption mechanism (4), and the adsorption mechanism (4) is fixedly connected to an air suction port of the air pump (11) via a pipeline through-type.

2. The electrical property testing device for COF packaging according to claim 1, characterized in that: The transmission mechanism (7) comprises a transmission toothed disc (71) and a driven gear (72); the transmission toothed disc (71) is rotationally connected to the wind shield (6); an impeller shaft (711) is coaxially fixedly provided at one end of the transmission toothed disc (71) close to the installation box (5); transmission impellers (712) are fixedly provided in a circumferential array on the circumferential wall of the impeller shaft (711); a transmission groove (713) is provided at one end of the transmission toothed disc (71) away from the installation box (5); forward-rotating internal teeth (714) are fixedly provided on the circumferential wall of the transmission groove (713); a reverse-rotating toothed disc (715) is coaxially fixedly provided in the transmission groove (713); the driven gear (72) is rotationally connected to the inner wall of the wind shield (6); the driven gear (72) forms a full-tooth meshing transmission with the forward-rotating internal teeth (714) and the reverse-rotating toothed disc (715).

3. The electrical property testing device for COF packaging according to claim 2, characterized in that: The adsorption mechanism (4) comprises a transmission shaft (41), an air extraction pipe (42) and an adsorption plate (43); the transmission shaft (41) is passed through a side wall of the air hood (6) away from the mounting box (5); one end of the transmission shaft (41) is fixedly connected to a driven gear (72); a circumferential wall of the air extraction pipe (42) is fixedly connected to the other end of the transmission shaft (41); an airway switching component (44) is fixedly provided on the circumferential wall of the air extraction pipe (42); an air outlet of the airway switching component (44) is fixedly connected to the circumferential wall of the air hood (6) via a pipe through-type, and an air inlet of the airway switching component (44) is fixedly connected to an air pump (11) via a pipe through-type; the adsorption plate (43) is fixedly connected to the bottom end of the air extraction pipe (42); and an adsorption air hole (45) which is in through-type communication with the air extraction pipe (42) is provided at the bottom end of the adsorption plate (43).

4. The electrical property testing device for COF packaging according to claim 3, characterized in that: The airway switching assembly (44) comprises a switching airway (441), a sliding ring plate (442), a fixed ring plate (443) and a return spring (444); the switching airway (441) is fixedly arranged on the circumferential wall of the air extraction pipeline (42); the inner cavity of the switching airway (441) is communicated with the inner cavity of the air extraction pipeline (42); the side wall of the switching airway (441) is fixedly connected to the air outlet of the air pump (11) via a pipe through-type; the other side wall of the switching airway (441) is fixedly connected to the wind hood (6) via a pipe through-type; the wind hood (6) and the air outlet of the air pump (11) are connected at The connecting positions of the switching airway (441) are arranged facing each other, the sliding ring plate (442) is slidably engaged with the inner wall of the exhaust pipe (42), an airway slider (446) is fixedly provided on the circumferential wall of the sliding ring plate (442), a slider air hole (447) is penetrated through the airway slider (446), the airway slider (446) is slidably connected to the inner wall of the switching airway (441), the fixed ring plate (443) is fixedly provided on the inner wall of the exhaust pipe (42), and the two ends of the return spring (444) are fixedly connected to the sliding ring plate (442) and the fixed ring plate (443), respectively.

5. The electrical property testing device for COF packaging according to claim 4, characterized in that: A baffle (61) is fixedly provided on the inner circumferential wall of the wind cover (6), a limit plate (62) is fixedly provided on the side wall of the transmission gear disc (71) close to the mounting box (5), a revolving groove (63) is provided at one end of the impeller shaft (711) close to the mounting box (5), a revolving spring (64) is nested in the revolving groove (63), a spring fixing shaft (65) coaxial with the revolving groove (63) is fixedly provided on the mounting box (5), and two ends of the revolving spring (64) are respectively fixedly connected to the inner wall of the revolving groove (63) and the circumferential wall of the spring fixing shaft (65).

6. The electrical property testing device for COF packaging according to claim 1, characterized in that: The longitudinal movement mechanism (2) comprises a longitudinal rail (21), a longitudinal movement slider (22), and a longitudinal movement cylinder (23); the longitudinal rail (21) is fixedly arranged on the inner wall of the electric measuring box (1), the longitudinal movement slider (22) is slidably engaged on the longitudinal rail (21), the longitudinal movement cylinder (23) is fixedly arranged at the bottom end of the longitudinal rail (21), and the piston rod end of the longitudinal movement cylinder (23) is fixedly connected to the top end of the installation box (5).

7. The electrical property testing device for COF packaging according to claim 6, characterized in that: The transverse movement mechanism (3) comprises a transverse rail (31), a transverse movement slider (32) and a transverse movement cylinder (33); the transverse rail (31) is fixedly arranged on the inner top wall of the electric measuring box (1); the transverse movement slider (32) is slidably engaged on the transverse rail (31); the transverse movement cylinder (33) is fixedly arranged on an end of the transverse movement slider (32) away from the transverse rail (31); and a piston rod end of the transverse movement cylinder (33) is fixedly connected to an end of the installation box (5) close to the transverse rail (31).

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