Pre-pressing mechanism of LED display chip screening machine

Abstract

A pre-pressing mechanism of an LED display chip screening machine comprises a rack and further comprises a conveying belt arranged on the rack, one end of the conveying belt is provided with a first guide plate assembly, the other end of the conveying belt is provided with a second guide plate assembly, a rolling rubber roller is arranged between the first guide plate assembly and the second guide plate assembly, one side of the rolling rubber roller is provided with a first transmission roller, and the other side of the rolling rubber roller is provided with a second transmission roller. The first transmission roller and the second transmission roller are matched to be used for winding and unwinding a release film and enabling the bottom of the rolling rubber roller to abut against the release film, bearing seats are arranged at the two ends of the rolling rubber roller respectively, a pressure sensor is arranged at the top of each bearing seat, and the two ends of each bearing seat are slidably connected with fixed sliding rails. A height mounting plate is arranged between the two pressure sensors, and the two ends of the height mounting plate are in transmission connection with lifting screw rods; the rolling device can roll an LED display chip in advance under a certain pressure condition, and is used for helping to improve the pseudo soldering screening capability of the LED display chip screening machine, so that LED pseudo soldering parts can be selected as much as possible through one-time screening.

Description

Technical Field

[0001] The utility model relates to the technical field of a detection mechanism of an LED display chip screening machine, in particular to a pre-pressing mechanism of an LED display chip screening machine. Background Art

[0002] As the name suggests, the LED display chip screening machine is to test the power-on lighting of LED display chips. If there is a cold solder joint in the LED display chip where at least one LED lamp bead fails to light up successfully, it is considered a defective product and will be screened out.

[0003] However, the existing LED display chip screening machine lacks a pre-pressing mechanism, which causes the following defects in the use of the LED display chip screening machine. The specific circumstances of the defects are as follows:

[0004] First of all, the LED display chip screening machine is just a simple power-on test, and it cannot guarantee that all unqualified products can be screened out 100%; (This is because the cold solder joint is mainly caused by oxides and dirt on the surface of the metal to be soldered. Its solder joints can sometimes conduct electricity and sometimes cannot conduct electricity, and there will be an unstable phenomenon of sometimes good and sometimes bad, so the cold solder joint is not easy to be found.)

[0005] Next, after the LED display chip is screened by the screening machine, when it goes through a series of subsequent processes (display screen testing, scrubbing, etc.), its cold-soldered LED lamp beads may be triggered by the surface contact pressure conditions of the subsequent processes, thus forming unqualified products;

[0006] Eventually, this phenomenon will occur: some LED display chips are shown as qualified after being screened by the screening machine; but after passing through the screening machine and subsequent processes, when they are ready to be shipped out for further testing, they are found to be unqualified. This shows that the LED display chip screening machine without a pre-pressing function will not only reduce the screening ability, but also waste the cost and time of subsequent process testing. Utility Model Content

[0007] The purpose of the present utility model is to overcome the above-mentioned defects in the prior art and to provide a pre-pressing mechanism for an LED display chip screening machine, which has the function of pre-rolling the LED display chips before helping the LED display chip screening machine to screen the LED display chips. Through the pre-pressing mechanism, the screening ability of the LED display chip screening machine to determine whether the LED display chips are poorly soldered can be improved subsequently, thereby saving the subsequent process detection cost and time of the LED display chip screening machine.

[0008] To achieve the above-mentioned purpose, the utility model provides a pre-pressing mechanism of an LED display chip screening machine, including a frame and a conveyor belt installed on the frame, wherein a first guide plate assembly is installed at one end of the conveyor belt, and a second guide plate assembly is installed at the other end, a rolling rubber roller is installed between the first guide plate assembly and the second guide plate assembly, a first transmission roller is installed on one side of the rolling rubber roller, and a second transmission roller is installed on the other side, the first transmission roller and the second transmission roller are used to cooperate to reel in and unreel a release film and make the bottom of the rolling rubber roller abut against the release film, bearing seats are respectively installed at both ends of the rolling rubber roller, a pressure sensor is installed on the top of each bearing seat, and fixed slide rails are slidably connected to both ends of each bearing seat, a height mounting plate is installed between the two pressure sensors, and lifting screws are transmission-connected to both ends of the height mounting plate.

[0009] Preferably, it also includes a pressure display gauge installed on the frame and electrically connected to the pressure sensor.

[0010] Preferably, bearing seats are respectively installed at both ends of the rolling rubber roller, and fixed slide rails are slidably connected at both ends of each bearing seat.

[0011] Preferably, a rotating handle for rotating the lifting screw is installed on the top of the lifting screw.

[0012] Preferably, the first guide plate assembly includes a first left guide plate installed on the left side of one end of the conveyor belt and a first right guide plate installed on the right side of one end of the conveyor belt, and the second guide plate assembly includes a second left guide plate installed on the left side of the other end of the conveyor belt and a second right guide plate installed on the right side of the other end of the conveyor belt.

[0013] Preferably, the first guide plate assembly also includes a first slide seat for respectively installing the first left guide plate and the first right guide plate and also for adjusting the distance between the first left guide plate and the first right guide plate, and the second guide plate assembly also includes a second slide seat for respectively installing the second left guide plate and the second right guide plate and also for adjusting the distance between the second left guide plate and the second right guide plate.

[0014] Preferably, a main transmission roller is installed in the conveyor belt, a driving motor is installed below one end of the main transmission roller, and a first synchronous wheel and synchronous belt assembly is transmission-connected between the driving motor and one end of the main transmission roller.

[0015] Preferably, a torque output shaft is installed on one side of the other end of the main drive roller, a first gear transmission assembly is installed on one end of the first drive roller, a second synchronous wheel and synchronous belt assembly is transmission-connected between one end of the torque output shaft and the other end of the main drive roller, and a third synchronous wheel and synchronous belt assembly is transmission-connected between one end of the torque output shaft and the first gear transmission assembly.

[0016] Preferably, a second gear transmission assembly is installed at one end of the second transmission roller, a magnetic powder brake is installed below the second gear transmission assembly, and a fourth synchronous wheel and synchronous belt assembly is transmission-connected between the second gear transmission assembly and the magnetic powder brake.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model provides a pre-pressing mechanism for an LED display chip screening machine.

[0019] Through the first guide plate assembly and the second guide plate assembly, the LED display chip can be accurately conveyed to the bottom of the rolling rubber roller for rolling, thereby preventing the LED display chip from shifting;

[0020] Through the first transmission roller, the rolling rubber roller and the second transmission roller, the rolling rubber roller can realize contact rolling of the transported release film on the LED display chip. The first advantage is that the LED display chip can be decontaminated, and the second advantage is that the surface of the LED display chip is prevented from being damaged during rolling.

[0021] The rolling rubber roller, bearing seat, pressure sensor and fixed slide rail realize pre-pressing and pressure display of LED display chip, and the height mounting plate and lifting screw realize different pressure adjustment.

[0022] 2. The utility model provides a pre-pressing mechanism for an LED display chip screening machine, which is a part of the mechanism of an LED display chip screening machine. It has the function of pre-rolling the LED display chip under certain pressure conditions, and is a pre-auxiliary function of an LED display chip screening machine. It pre-simulates the pressure conditions of daily work and detection for an LED display chip screening machine, thereby exposing more LED display chips with cold solder joints in advance, facilitating detection for an LED display chip screening machine, improving the cold solder joint screening capability of the LED display chip screening machine, and saving the subsequent process detection cost and time of the LED display chip screening machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1It is a structural schematic diagram of two pre-pressing mechanisms of an LED display chip screening machine provided in Example 2 of the utility model assembled together;

[0025] Figure 2 This is a structural schematic diagram of a pre-pressing mechanism of an LED display chip screening machine provided in Example 1 of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a first guide plate assembly and a second guide plate assembly provided in Example 1 of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the rolling rubber roller, the bearing seat, the pressure sensor, the slider, the fixed slide rail, the height mounting plate, the lifting screw and the rotating handle provided in Example 1 of the utility model;

[0028] Figure 5 It is a structural schematic diagram of a rolling rubber roller, a bearing seat, a pressure sensor, a slider, a fixed slide rail and a height mounting plate provided in Example 1 of the utility model;

[0029] Figure 6 It is a structural schematic diagram of a conveyor belt, a first transmission roller, and a second transmission roller provided in Example 1 of the utility model from one viewing angle;

[0030] Figure 7 It is a structural schematic diagram of another perspective of the conveyor belt, the first transmission roller and the second transmission roller provided in Example 1 of the utility model.

[0031] Included in the figure are:

[0032] 1. Frame; 100. Transport debugger; 2. Transport belt; 21. Main drive roller; 22. Drive motor; 23. First synchronous wheel synchronous belt assembly; 26. Torque output shaft; 27. Second synchronous wheel synchronous belt assembly; 3. First guide plate assembly; 30. First carriage seat; 31. First left guide plate; 32. First right guide plate; 4. Second guide plate assembly; 40. Second carriage seat; 41. Second left guide plate; 42. Second right guide plate; 5. Rolling rubber roller; 51. Bearing seat; 52. Pressure sensor; 53. Sliding block; 54. Fixed slide rail; 55. Pressure display gauge; 57. Height mounting plate; 58. Lifting screw; 59. Turning handle; 6. First transmission roller; 61. First gear transmission assembly; 62. Third synchronous wheel synchronous belt assembly; 7. Second transmission roller; 71. Second gear transmission assembly; 72. Magnetic powder brake; 73. Fourth synchronous wheel synchronous belt assembly. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in this embodiment of the utility model to clearly and completely describe the technical solution in this embodiment of the utility model. Obviously, the described embodiment is one embodiment of the utility model, not all embodiments of the utility model. Based on this embodiment of the utility model, all other embodiments of the utility model obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] See also Figures 2 to 7 The embodiment of the utility model provides a pre-pressing mechanism of an LED display chip screening machine, including a frame 1, and also including a conveyor belt 2 installed on the frame 1, a first guide plate assembly 3 is installed at one end of the conveyor belt 2, and a second guide plate assembly 4 is installed at the other end, a rolling rubber roller 5 is installed between the first guide plate assembly 3 and the second guide plate assembly 4, a first transmission roller 6 is installed on one side of the rolling rubber roller 5, and a second transmission roller 7 is installed on the other side, the first transmission roller 6 and the second transmission roller 7 cooperate to retract and unwind the release film and make the bottom of the rolling rubber roller 5 abut on the release film, and the rolling rubber roller 5 are respectively provided with bearing seats 51 at both ends (wherein, the bearing seat 51 includes a seat body and a bearing body installed inside the seat body, the bearing body is sleeved with the shaft end of the rolling rubber roller 5, and the rolling rubber roller 5 is driven to rotate), a pressure sensor 52 is installed on the top of each bearing seat 51, and a fixed slide rail 54 is slidably connected at both ends of each bearing seat 51 (wherein, a slider 53 is installed at both ends of each bearing seat 51, and the slider 53 is slidably connected to the fixed slide rail 54), a height installation plate 57 is installed between the two pressure sensors 52, and lifting screws 58 are drivingly connected at both ends of the height installation plate (57).

[0036] The pre-pressing mechanism of the LED display chip screening machine also includes a pressure display gauge 55 installed on the frame 1 and electrically connected to the pressure sensor 52. The pressure display gauge 55 is used to display the currently set pressure value.

[0037] A rotating handle 59 for rotating the lifting screw 58 is installed on the top of the lifting screw 58.

[0038] The first guide plate assembly 3 includes a first left guide plate 31 installed on the left side of one end of the conveyor belt 2 and a first right guide plate 32 installed on the right side of one end of the conveyor belt 2, and the second guide plate assembly 4 includes a second left guide plate 41 installed on the left side of the other end of the conveyor belt 2 and a second right guide plate 42 installed on the right side of the other end of the conveyor belt 2. Further, the first guide plate assembly 3 also includes a first carriage seat 30 for respectively mounting the first left guide plate 31 and the first right guide plate 32 and also for adjusting the distance between the first left guide plate 31 and the first right guide plate 32, and the second guide plate assembly 4 also includes a second carriage seat 40 for respectively mounting the second left guide plate 41 and the second right guide plate 42 and also for adjusting the distance between the second left guide plate 41 and the second right guide plate 42.

[0039] In this embodiment, a main transmission roller 21 is installed in the conveyor belt 2, a driving motor 22 is installed below one end of the main transmission roller 21, and a first synchronous wheel synchronous belt assembly 23 is transmission-connected between the driving motor 22 and one end of the main transmission roller 21. In other embodiments, the driving motor 22 is directly transmission-connected to one end of the main transmission roller 21.

[0040] A torque output shaft 26 is installed on one side of the other end of the main drive roller 21, and a first gear transmission assembly 61 is installed at one end of the first drive roller 6. A second synchronous wheel and belt assembly 27 is connected between one end of the torque output shaft 26 and the other end of the main drive roller 21, and a third synchronous wheel and belt assembly 62 is connected between one end of the torque output shaft 26 and the first gear transmission assembly 61. The function of the torque output shaft 26 is to provide a certain torque to prevent the first drive roller 6 from being unable to rotate.

[0041] A second gear transmission assembly 71 is installed at one end of the second transmission roller 7, a magnetic powder brake 72 is installed below the second gear transmission assembly 71, and a fourth synchronous wheel and synchronous belt assembly 73 is transmission-connected between the second gear transmission assembly 71 and the magnetic powder brake 72; the function of the magnetic powder brake 72 is to provide a certain resistance to prevent the second transmission roller 7 from over-rotating.

[0042] The other end of the first transmission roller 6 and the other end of the second transmission roller 7 are respectively equipped with a rotating motor (not shown in the drawings).

[0043] The working principle of the pre-pressing mechanism of the LED display chip screening machine in the embodiment of the utility model is as follows:

[0044] Through the first guide plate assembly 3 and the second guide plate assembly 4, the LED display chip can be accurately transported to the bottom of the rolling rubber roller 5 for rolling, thereby preventing the LED display chip from shifting;

[0045] Through the first transmission roller 6, the rolling rubber roller 5 and the second transmission roller 7, the rolling rubber roller 5 can realize contact rolling of the LED display chip through the transported release film. The first advantage is that the LED display chip can be decontaminated, and the second advantage is that the surface of the LED display chip is prevented from being damaged during rolling.

[0046] The rolling rubber roller 5, the bearing seat 51, the pressure sensor 52, the fixed slide rail 54, the pressure display gauge 55, the height mounting plate 57, the lifting screw 58 and the rotating handle 59 can be summarized into the following two functions:

[0047] First: a certain pressure pre-pressing function. When the height mounting plate 57 is fixed and the pre-pressing mechanism is not working, the LED display chip is manually transported to the bottom of the rolling rubber roller 5. At this time, the rolling rubber roller 5 rises, driving the bearing seat 51 to slide and rise, driving the pressure sensor 52 to elastically press on the bottom of the height mounting plate 57. At this time, the pressure display gauge 55 will display a certain pressure value, which is the rolling value when the pre-pressing mechanism is rolling;

[0048] Second: the function of adjusting different pressure values, rotating the handle 59, so that the lifting screw 58 rotates, driving the height mounting plate 57 to rise or fall, thereby adjusting different pressure values.

[0049] The pre-pressing mechanism of an LED display chip screening machine in an embodiment of the utility model has the function of pre-rolling the LED display chip under certain pressure conditions, which is used to help improve the cold soldering screening capability of the LED display chip screening machine, so that as many unqualified LED cold soldering parts as possible can be selected in one screening.

[0050] Embodiment 2:

[0051] See also Figure 7 This embodiment 2 is composed of a linear array of pre-pressing mechanisms of two or more embodiments 1 of an LED display chip screening machine, and also includes a transport debugger 100 of a conveyor belt 2 installed on a frame 1. The design advantage of this embodiment 2 is that two or more LED display chips can be pre-pressed at one time, further improving the pre-pressing efficiency before screening.

[0052] Embodiment 3:

[0053] The product applicable to the pre-pressing mechanism of an LED display chip screening machine in an embodiment of the utility model can be a Micro-LED display chip, a common LED display chip, or an LED display module, an LED display panel or an LED liquid crystal display screen composed of an array of several LED display chips.

[0054] In summary, the pre-pressing mechanism of the LED display chip screening machine of the utility model is applicable not only to LED display chips, but also to a series of products composed of LED display chips for emitting light or having display purposes.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-pressing mechanism for an LED display chip screening machine, comprising a frame (1), characterized in that: The invention also comprises a conveyor belt (2) mounted on the frame (1), wherein a first guide plate assembly (3) is mounted on one end of the conveyor belt (2), and a second guide plate assembly (4) is mounted on the other end; a rolling rubber roller (5) is mounted between the first guide plate assembly (3) and the second guide plate assembly (4); a first transmission roller (6) is mounted on one side of the rolling rubber roller (5), and a second transmission roller (7) is mounted on the other side; the first transmission roller (6) and the second transmission roller (7) cooperate to reel in and unreel the release film and make the bottom of the rolling rubber roller (5) abut against the release film; bearing seats (51) are mounted on both ends of the rolling rubber roller (5); a pressure sensor (52) is mounted on the top of each bearing seat (51); fixed slide rails (54) are slidably connected to both ends of each bearing seat (51); a height mounting plate (57) is mounted between the two pressure sensors (52); and lifting screws (58) are transmission-connected to both ends of the height mounting plate (57).

2. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: It also includes a pressure display meter (55) which is mounted on the frame (1) and is electrically connected to the pressure sensor (52).

3. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: A rotating handle (59) for rotating the lifting screw (58) is arranged on the top of the lifting screw (58).

4. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: The first guide plate assembly (3) comprises a first left guide plate (31) mounted on the left side of one end of the conveyor belt (2) and a first right guide plate (32) mounted on the right side of one end of the conveyor belt (2), and the second guide plate assembly (4) comprises a second left guide plate (41) mounted on the left side of the other end of the conveyor belt (2) and a second right guide plate (42) mounted on the right side of the other end of the conveyor belt (2).

5. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: The first guide plate assembly (3) further comprises a first carriage seat (30) for respectively mounting a first left guide plate (31) and a first right guide plate (32) and for adjusting the distance between the first left guide plate (31) and the first right guide plate (32); the second guide plate assembly (4) further comprises a second carriage seat (40) for respectively mounting a second left guide plate (41) and a second right guide plate (42) and for adjusting the distance between the second left guide plate (41) and the second right guide plate (42).

6. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: A main transmission roller (21) is installed in the conveyor belt (2), a driving motor (22) is installed below one end of the main transmission roller (21), and a first synchronous wheel synchronous belt assembly (23) is connected between the driving motor (22) and one end of the main transmission roller (21).

7. The pre-pressing mechanism of the LED display chip screening machine according to claim 6, characterized in that: A torque output shaft (26) is mounted on one side of the other end of the main transmission roller (21); a first gear transmission assembly (61) is mounted on one end of the first transmission roller (6); a second synchronous wheel and belt assembly (27) is transmission-connected between one end of the torque output shaft (26) and the other end of the main transmission roller (21); and a third synchronous wheel and belt assembly (62) is transmission-connected between one end of the torque output shaft (26) and the first gear transmission assembly (61).

8. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: A second gear transmission assembly (71) is mounted at one end of the second transmission roller (7), a magnetic powder brake (72) is mounted below the second gear transmission assembly (71), and a fourth synchronous wheel and synchronous belt assembly (73) is transmission-connected between the second gear transmission assembly (71) and the magnetic powder brake (72).

9. The pre-pressing mechanism of the LED display chip screening machine according to claim 1, characterized in that: The other end of the first transmission roller (6) and the other end of the second transmission roller (7) are respectively provided with a rotating motor.

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