Thermocompression bonding device for touch screen production

Abstract

The utility model relates to a hot pressing device for touch screen production, which comprises a base, one side of the top of the base is fixedly connected with a support frame, one side of the top of the support frame is fixedly connected with a top plate, and the middle of the top plate is connected with a hot pressing mechanism through a hydraulic machine. And a placing table is arranged at the top of the base and located below the hot pressing mechanism. The utility model relates to the technical field of touch screen production. According to the thermocompression bonding device for touch screen production, through the arranged hot pressing mechanism, a touch screen can be automatically heated when the touch screen is pressed, and power is automatically cut off after pressing is completed, so that the situation that a heating block continuously heats and consumes power is avoided; and the heating block is powered off after pressing, so that surrounding elements can be prevented from being in a high-temperature environment for a long time, the aging speed of the elements is reduced, the maintenance frequency is reduced, and the service life of the machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screen production, in particular to a hot pressing device for touch screen production. Background Art

[0002] A touch screen is an inductive liquid crystal display device that can receive input signals such as contacts. When a graphic button on the screen is touched, the tactile feedback system on the screen can drive various connection devices according to a pre-programmed program. It can be used to replace mechanical button panels and create vivid audio and video effects through the LCD display.

[0003] In the prior art, a touch screen is generally formed by laminating multiple components such as a cover glass, a touch sensor, a front plate and a back plate, and adhesive is filled between each component. Therefore, in order to ensure the stability of the connection, the touch screen is usually heated during lamination so that the adhesive can evenly fill the gap and improve the integrity of the touch screen. During the lamination process, the heating block used to heat the touch screen will continue to heat, so the heating block will not stop after the touch screen is pressed, which will waste a lot of electricity. In addition, the continuous high temperature will also damage the components around the heating block, resulting in a reduction in the service life of the machine. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a heat pressing device for touch screen production, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A hot pressing device for touch screen production comprises a base, a support frame is fixedly connected to one side of the top of the base, a top plate is fixedly connected to one side of the top of the support frame, a hot pressing mechanism is connected to the middle of the top plate via a hydraulic press, and a placement table is provided on the top of the base below the hot pressing mechanism.

[0007] By adopting the above technical solution, the touch screen can be heated by the provided heat pressing mechanism during heat pressing of the touch screen, and the heating is automatically stopped after the pressing is completed, thereby effectively reducing the waste of electricity.

[0008] In a preferred example, the utility model can be further configured as follows: the hot pressing mechanism includes a shell, a heating block and a power connection unit, the top of the shell is fixedly connected to the output end of the hydraulic press, a pressure groove is provided at the bottom of the shell, a heating block is slidably connected in the pressure groove, and a power connection unit is provided between the top of the heating block and the inner top wall of the pressure groove.

[0009] By adopting the above technical solution, through the power connection unit set between the shell and the heating block, when the heating block contacts the touch screen and is squeezed into the pressure groove by the supporting force of the touch screen, the power connection unit is automatically connected, and then the heating block can automatically heat the touch screen. After the pressing is completed, the hot pressing mechanism moves up and the heating block is reset, thereby disconnecting the power connection unit to stop the heating block from heating.

[0010] In a preferred example, the utility model can be further configured as follows: the power connection unit includes a connecting column, an electrical contact and a conductive sheet, the top of the connecting column is fixedly connected to the inner top wall of the pressure tank, a circular groove is provided on the top of the heating block, a conductive sheet is embedded in the circular groove, and the bottom of the outer wall of the connecting column is fixedly connected to an electrical contact electrically connected to the conductive sheet.

[0011] By adopting the above technical solution, through the provision of electrical contacts and conductive sheets, when the connecting column is inserted into the circular groove, the electric heating block is energized and heated after the electrical contacts come into contact with the conductive sheets. After the pressing is completed, the hydraulic press moves upward to move the hot pressing mechanism away from the touch screen. At this time, the heating block is reset, so that the conductive sheet is separated from the electrical contacts and the power is cut off, thereby realizing the function of automatic heating and automatic power-off.

[0012] In a preferred example, the utility model can be further configured as follows: the diameter of the circular groove is greater than the diameter of the connecting column, and the top of the circular groove is processed with a chamfer.

[0013] By adopting the above technical solution, by making the diameter of the connecting column smaller than the diameter of the circular groove, the connecting column can avoid contact with the conductive sheet when inserted into the circular groove to avoid scratching the conductive sheet, and the chamfer set at the top of the circular groove can reduce the friction of the electrical contact when entering the circular groove, thereby reducing the wear of the conductive sheet.

[0014] In a preferred example, the utility model can be further configured as follows: an air pump is fixedly connected to the bottom of the top plate, and the bottom of the air pump is connected to the pressure tank through a connecting pipe.

[0015] By adopting the above technical solution, air can be injected into the pressure tank through the provided air pump, the air pressure in the pressure tank can be adjusted, and the extrusion force of the hot pressing mechanism can be controlled by the change of the air pressure.

[0016] In a preferred example, the utility model can be further configured as follows: four corners of the top of the shell are fixedly connected with slide rails, and the bottom of the top plate is provided with a slide groove slidably connected to the slide rails.

[0017] By adopting the above technical solution, the provided slide rails and slide grooves can be used to assist the downward movement of the heat pressing mechanism to ensure that the heat pressing mechanism can move downward horizontally, so that the heating block can remain horizontal when pressing the touch screen, thereby improving the pressing effect.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. A hot pressing device for touch screen production can automatically heat the touch screen when pressing the touch screen through the provided hot pressing mechanism, and automatically cut off the power after pressing is completed, so as to avoid the heating block from continuously heating and wasting electricity, and the heating block can be cut off after pressing is completed to avoid the surrounding components being in a high temperature environment for a long time, so as to reduce the aging speed of the components, reduce the maintenance frequency, and increase the service life of the machine;

[0020] 2. This kind of hot pressing device for touch screen production can adjust the air pressure in the pressure tank through the set air pump, thereby changing the force of the hot pressing mechanism pressing the screen, expanding the application scope of the hot pressing mechanism, and improving the practicality of the hot pressing device for touch screen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The utility model is a schematic structural diagram of a heat pressing device for touch screen production.

[0023] Figure 2 The utility model is a schematic structural diagram of a top plate in a heat pressing device for touch screen production.

[0024] Figure 3 The utility model is a schematic diagram of the internal structure of a heat pressing mechanism in a heat pressing device for touch screen production.

[0025] In the figure, 1. base; 2. support frame; 3. top plate; 4. hydraulic press; 5. hot pressing mechanism; 51. shell; 52. heating block; 53. power connection unit; 531. connecting column; 532. electrical contact; 533. conductive sheet; 6. placing table; 7. pressure tank; 8. circular groove; 9. air pump; 10. connecting pipe; 11. slide rail; 12. slide groove. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings. Example

[0027] Reference Figure 1 - Figure 3The utility model discloses a hot pressing device for touch screen production, comprising a base 1, a support frame 2 is fixedly connected to one side of the top of the base 1, a top plate 3 is fixedly connected to one side of the top of the support frame 2, a hot pressing mechanism 5 is connected to the middle of the top plate 3 through a hydraulic press 4, and a placement table 6 is provided on the top of the base 1 below the hot pressing mechanism 5.

[0028] In this embodiment, the multi-layer components of the touch screen are stacked and then placed on the placement table 6, and then the hydraulic press 4 is started, and the hydraulic press 4 controls the hot pressing mechanism 5 to approach and press the touch screen.

[0029] When the heating block 52 of the heat pressing mechanism 5 presses the touch screen, the touch screen also applies a supporting force opposite to the pressure to the heating block 52, thereby pressing the heating block 52 into the pressure groove 7 through the supporting force, and then inserting the connecting column 531 into the circular groove 8. At this time, the electrical contact 532 contacts the conductive sheet 533 to make the heating block 52 energized and heated, thereby heating the touch screen.

[0030] After the touch screen is pressed, the shell 51 is lifted by the hydraulic press 4, and then the heating block 52 slides down in the pressure groove 7 due to gravity, so that the connecting column 531 is disengaged from the circular groove 8, and the electrical contact 532 is separated from the conductive sheet 533, so that the heating block 52 is powered off to avoid the heating block 52 being continuously powered on and wasting electricity. The powered-off heating block 52 will also avoid heat generation, thereby preventing the surrounding components from being in a high temperature environment for a long time and aging, thereby improving the service life of the hot pressing device for touch screen production.

[0031] In a further preferred embodiment of the present invention, Figure 3 As shown, the hot pressing mechanism 5 includes a shell 51, a heating block 52 and an electrical connection unit 53. The top of the shell 51 is fixedly connected to the output end of the hydraulic press 4. A pressure groove 7 is provided at the bottom of the shell 51. A heating block 52 is slidably connected in the pressure groove 7. The electrical connection unit 53 is provided between the top of the heating block 52 and the inner top wall of the pressure groove 7.

[0032] In the present embodiment, during the hot pressing of the touch screen, the heating block 52 will continue to be heated, and when the touch screen is pressed, the heating block 52 will also continue to be heated, which will lead to a waste of electricity and cause the surrounding components to be continuously in a high temperature environment, which will accelerate the aging of the components. Therefore, by providing a power connection unit 53, the power connection unit 53 is triggered when the heating block 52 is squeezed into the pressure groove 7 due to the supporting force of the touch screen when pressing the touch screen, so that the heating block 52 is energized and heated. Subsequently, after the pressing is completed, the hot pressing mechanism 5 is raised by the hydraulic press 4, so that the heating block 52 slides down due to the action of gravity during the upward movement of the shell 51, thereby disconnecting the power connection unit 53 and cutting off the power of the heating block 52, thereby avoiding the heating block 52 from continuously heating and wasting electricity, and can reduce the time that the components are in the high temperature environment, reduce the aging of the components, and thus increase the service life of the hot pressing mechanism 5.

[0033] In a further preferred embodiment of the present invention, Figure 3 As shown, the power connection unit 53 includes a connecting column 531, an electrical contact 532 and a conductive sheet 533. The top of the connecting column 531 is fixedly connected to the inner top wall of the pressure groove 7. A circular groove 8 is provided on the top of the heating block 52, and a conductive sheet 533 is embedded in the circular groove 8. The bottom of the outer wall of the connecting column 531 is fixedly connected to an electrical contact 532 electrically connected to the conductive sheet 533.

[0034] In this embodiment, in order to make the power connection unit 53 connected when the heating block 52 slides into the pressure groove 7, the power connection unit 53 is disconnected when the heating block 52 is reset due to gravity, so that the electrical contact 532 used for connecting the circuit is separated from the conductive sheet 533, and refer to Figure 3 It can be found that by making the conductive sheet 533 cover the inner wall of the circular groove 8, when the connecting column 531 is inserted into the circular groove 8, the electrical contact 532 will contact the conductive sheet 533, so that the heating block 52 is energized and heated, and the conductive sheet 533 covered in the circular groove 8 can keep the heating block 52 energized during the process of being squeezed and continuously moving upward, so that the touch screen can be stably heated when the touch screen is pressed.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, the diameter of the circular groove 8 is larger than the diameter of the connecting column 531 , and the top of the circular groove 8 is chamfered.

[0036] In this embodiment, when the power connection unit 53 is connected, the connection column 531 is inserted into the circular groove 8, so the connection column 531 is in contact with the circular groove 8. Figure 3It can be found that the conductive sheet 533 covers the inner wall of the circular groove 8, which will cause friction between the connecting column 531 and the conductive sheet 533, causing the conductive sheet 533 to wear and oxidize, resulting in poor contact between the conductive sheet 533 and the electrical contact 532. Therefore, the diameter of the connecting column 531 is made smaller than the diameter of the circular groove 8, thereby avoiding contact between the connecting column 531 and the conductive sheet 533 when inserted into the circular groove 8, thereby avoiding damage to the conductive sheet 533.

[0037] When the connecting column 531 is inserted into the circular groove 8, the electric contact 532 on the outer wall of the connecting column 531 will contact and rub against the inner wall of the circular groove 8. When the electric contact 532 enters the circular groove 8, it will be squeezed at the opening of the circular groove 8, which will cause the electric contact 532 to be scratched and worn, and will also be oxidized to cause poor contact. Therefore, a chamfer is provided at the opening of the circular groove 8. The chamfered slope reduces the wear on the electric contact 532 and improves the service life of the electric contact 532.

[0038] In a further preferred embodiment of the present invention, Figure 1 As shown, an air pump 9 is fixedly connected to the bottom of the top plate 3 , and the bottom of the air pump 9 is connected to the pressure tank 7 through a connecting pipe 10 .

[0039] In this embodiment, in order to maintain the pressing effect of the heating block 52 on the touch screen, in addition to pressing the touch screen by the weight of the heating block 52 itself, air is injected into the pressure groove 7, and the compressed air is used to provide pressure to the heating block 52, so that the pressure on the touch screen comes from the air pressure and the weight of the heating block 52 itself. Since the styles of touch screens are different, the components in the touch screens are also different, which will cause the thickness of the touch screen to change, resulting in the heating block 52 being pressed into the pressure groove 7. The depth increases, the air pressure increases, and the pressure on the touch screen increases, which leads to the risk of the display layer in the touch screen being damaged or even destroyed. Therefore, an air pump 9 and a connecting pipe 10 are provided to adjust the air in the pressure groove 7 to change the gas pressure, thereby avoiding over-pressure damage to the touch screen and improving the scope of use of the hot pressing device for touch screen production.

[0040] Among them, a pressure sensor for monitoring air pressure can also be arranged in the pressure tank 7, and the pressure sensor is a commercially available product and is not within the scope of improvement of the present application, so it will not be described in detail.

[0041] In a further preferred embodiment of the present invention, Figure 1 As shown, four corners of the top of the housing 51 are fixedly connected with slide rails 11 , and a slide groove 12 slidably connected to the slide rails 11 is provided at the bottom of the top plate 3 .

[0042] In this embodiment, when the touch screen is pressed by the hydraulic press 4, if the touch screen is located directly below the hot pressing mechanism 5, the hot pressing mechanism 5 can press the touch screen normally. When the touch screen deviates from the center of the hot pressing mechanism 5, the supporting force of the hot pressing mechanism 5 will deviate from the center, causing the supporting force of the hot pressing mechanism 5 to form a force arm with the center, causing the hot pressing mechanism 5 to tilt slightly. Therefore, the closer the touch screen is to the center of the hot pressing mechanism 5, the greater the pressure it receives, which will affect the pressing effect of the touch screen. Therefore, a slide rail 11 is provided to assist the hot pressing mechanism 5, so that when the hot pressing mechanism 5 is tilted, it is restricted by the slide rail 11 to avoid the tilt of the hot pressing mechanism 5, thereby ensuring the pressing effect. In addition, the setting of the slide rail 11 and the slide groove 12 can also make the hot pressing mechanism 5 more stable when moving.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hot pressing device for touch screen production, comprising a base (1), characterized in that: A support frame (2) is fixedly connected to one side of the top of the base (1), a top plate (3) is fixedly connected to one side of the top of the support frame (2), a middle portion of the top plate (3) is connected to a hot pressing mechanism (5) via a hydraulic press (4), and a placement table (6) is provided at the top of the base (1) below the hot pressing mechanism (5).

2. A hot pressing device for touch screen production according to claim 1, characterized in that: The hot pressing mechanism (5) comprises a shell (51), a heating block (52) and an electrical connection unit (53); the top of the shell (51) is fixedly connected to the output end of the hydraulic press (4); the bottom of the shell (51) is provided with a pressure groove (7); the heating block (52) is slidably connected in the pressure groove (7); and the electrical connection unit (53) is provided between the top of the heating block (52) and the inner top wall of the pressure groove (7).

3. A hot pressing device for touch screen production according to claim 2, characterized in that: The power connection unit (53) comprises a connection column (531), an electrical contact (532) and a conductive sheet (533); the top of the connection column (531) is fixedly connected to the inner top wall of the pressure groove (7); the top of the heating block (52) is provided with a circular groove (8), the circular groove (8) is embedded with a conductive sheet (533); the bottom of the outer wall of the connection column (531) is fixedly connected to the electrical contact (532) electrically connected to the conductive sheet (533).

4. A hot pressing device for touch screen production according to claim 3, characterized in that: The diameter of the circular groove (8) is greater than the diameter of the connecting column (531), and the top of the circular groove (8) is processed with a chamfer.

5. A hot pressing device for touch screen production according to claim 2, characterized in that: An air pump (9) is fixedly connected to the bottom of the top plate (3), and the bottom of the air pump (9) is connected to the pressure tank (7) via a connecting pipe (10).

6. A hot pressing device for touch screen production according to claim 2, characterized in that: The four corners of the top of the shell (51) are fixedly connected to slide rails (11), and the bottom of the top plate (3) is provided with a slide groove (12) slidably connected to the slide rails (11).

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