A touch screen heat sealing device

Abstract

This utility model provides a touch screen hot pressing device, belonging to the technical field of hot pressing devices. It includes a support base and a substrate. The support base is fixedly connected to a base, and a base hole is formed in the side wall of the support base. A pressing plate is fixedly connected to the side wall of the substrate, and the pressing plate corresponds to the position of the base hole. A lifting assembly is fixedly installed on the inner wall of the support base. The lifting assembly includes a piston cylinder, which is fixedly connected to the inner wall of the support base. The advantages of this utility model are: by setting the above-mentioned assembly, the hot pressing speed is gradually reduced during the pressing process to prevent damage to the touch screen body from excessively fast pressing. It also prevents air bubbles from forming after the touch screen is hot-pressed due to excessively fast pressing. At the same time, the airbag blows away dust from the touch screen to prevent dust from affecting the hot pressing process, thereby preventing residual air bubbles and dust inside the touch screen.

Description

Technical Field

[0001] This utility model relates to the field of hot pressing, and more specifically, to a hot pressing device for touch screens. Background Technology

[0002] Thermoforming is a simple and common processing method in the plastics processing industry. In touchscreen production, this process is used to bond and fix various components of the touchscreen, such as the touch glass, touch layer, and backlight layer, to ensure the quality and stability of the mobile phone display. For example, in the production of capacitive touchscreens, the conductive film inside the touchscreen needs to be bonded to the flexible circuit board through thermoforming before subsequent processing and use can be carried out. In full lamination technology, thermoforming is used to bond the protective glass, touchscreen, and display screen with OCA colloid without gaps, which can enhance the display effect of the screen.

[0003] Currently available hot pressing devices use a substrate to press a touchscreen together seamlessly. However, excessively high pressing speeds can damage the glass, touchscreen, and display screen. Furthermore, excessively high pressing speeds can prevent air bubbles from being expelled from the adhesive during hot pressing, affecting product quality. Additionally, dust on the surfaces of the glass, touchscreen, and display screen can cause air bubbles to form inside after pressing. How to invent a touchscreen hot pressing device to improve these problems has become an urgent issue for those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a touch screen hot pressing device, which aims to improve the problems of damage caused by excessive speed and the generation of air bubbles.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a touch screen hot pressing device, including a support base and a substrate. The support base is fixedly connected to a base, and a base hole is opened on the side wall of the support base. A pressing plate is fixedly connected to the side wall of the substrate, and the pressing plate is positioned corresponding to the base hole. A lifting assembly is fixedly installed on the inner wall of the support base. The lifting assembly includes a piston cylinder, and the piston cylinder is fixedly connected to the inner wall of the support base.

[0007] Preferably, an air bladder is fixedly installed on the inner wall of the piston cylinder, and an exhaust port is provided on the side wall of the piston cylinder.

[0008] Preferably, the lifting assembly further includes a piston rod, one end of which is fixedly mounted with a piston plate, and the other end of which is fixedly connected to a base plate. A spring is sleeved on the outer wall of the piston rod, and the two ends of the spring are fixedly connected to the side wall of the piston plate and the inner wall of the piston cylinder, respectively.

[0009] Preferably, the piston rod and piston plate are slidably connected to the inner wall of the piston cylinder, the piston plate is fixedly connected to the side wall of the airbag, and the side wall of the piston plate is provided with a vent hole.

[0010] Preferably, a motor is fixedly installed on the side wall of the base, a lead screw is fixedly installed at one end of the motor, the lead screw is threadedly connected to the base plate, and a pressing rod is fixedly installed on the side wall of the base plate.

[0011] Preferably, the inner wall of the support base is provided with a pressing hole, a sensor is fixedly installed on the inner wall of the pressing hole, the pressing rod is positioned corresponding to the pressing hole, and the pressing rod is located above the sensor.

[0012] The beneficial effects of this utility model are:

[0013] The motor drives the lead screw to rotate, which in turn moves the substrate. During this process, the piston rod and piston plate move with the substrate under the action of the tension spring, which in turn compresses the air bag below, causing the gas to be discharged from the exhaust port. This blows away the dust on the touch screen, preventing dust from affecting the hot pressing and preventing air bubbles caused by dust from affecting the result. At the same time, since the motor speed is stable, the elasticity generated during the spring tension and air bag compression gradually slows down the movement speed of the piston rod and piston plate, which in turn gradually slows down the movement speed of the pressing plate and substrate. This results in a very slow contact speed with the touch screen, preventing damage to the touch screen from a large impact caused by a fast speed. It also prevents the gas in the adhesive from being trapped on the touch screen surface and affecting its processing quality if the descent speed is too fast. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the main view structure of a touch screen hot pressing device provided by an embodiment of this utility model;

[0016] Figure 2 This is a second-view structural cross-sectional diagram of a touch screen hot-pressing device provided in an embodiment of this utility model;

[0017] Figure 3 This is a third-view structural cross-sectional diagram of a touch screen hot-pressing device provided in this embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the lifting assembly structure of a touch screen hot pressing device provided by an embodiment of this utility model;

[0019] Figure 5 This is a cross-sectional schematic diagram of the lifting assembly structure of a touch screen hot pressing device provided by an embodiment of this utility model.

[0020] In the diagram: 1. Base; 2. Motor; 3. Support seat; 4. Lead screw; 5. Lifting assembly; 501. Piston cylinder; 502. Airbag; 503. Piston plate; 504. Piston rod; 505. Spring; 506. Exhaust port; 507. Vent hole; 6. Base hole; 7. Pressing hole; 8. Sensor; 9. Pressing rod; 10. Pressing plate; 11. Base plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Example, refer to Figures 1-5 A touch screen hot pressing device includes a support base 3 and a substrate 11. The support base 3 is fixedly connected to a base 1. A base hole 6 is opened on the side wall of the support base 3. A pressing plate 10 is fixedly connected to the side wall of the substrate 11. The pressing plate 10 is positioned corresponding to the base hole 6. A lifting assembly 5 is fixedly installed on the inner wall of the support base 3. The lifting assembly 5 includes a piston cylinder 501, which is fixedly connected to the inner wall of the support base 3.

[0023] Furthermore, a motor 2 is fixedly installed on the side wall of the base 1, and a lead screw 4 is fixedly installed on one end of the motor 2. The lead screw 4 is threadedly connected to the base plate 11.

[0024] It should be noted that: when the pressed touch screen is placed in the base hole 6 to position the touch screen to be pressed, the motor 2 is powered on and starts to drive the lead screw 4 to rotate clockwise at a stable speed. Since the lead screw 4 is threadedly connected to the base plate 11, the base plate 11 begins to move downward along the axis of the lead screw 4. At this time, the pressing plate 10 on the side wall of the base plate 11 maintains a relative position with the base hole 6, and the pressing rod 9 descends synchronously with the base plate 11, gradually approaching the pressing hole 7 on the inner wall of the support base 3.

[0025] Furthermore, an airbag 502 is fixedly installed on the inner wall of the piston cylinder 501, and an exhaust hole 506 is opened on the side wall of the piston cylinder 501; the lifting assembly 5 also includes a piston rod 504, a piston plate 503 is fixedly installed on one end of the piston rod 504, the other end of the piston rod 504 is fixedly connected to the base plate 11, a spring 505 is sleeved on the outer wall of the piston rod 504, and the two ends of the spring 505 are fixedly connected to the side wall of the piston plate 503 and the inner wall of the piston cylinder 501, respectively. The piston rod 504 and the piston plate 503 are slidably connected to the inner wall of the piston cylinder 501, the piston plate 503 is fixedly connected to the side wall of the airbag 502, and an air vent 507 is opened on the side wall of the piston plate 503.

[0026] It should be noted that as the substrate 11 descends, the piston rod 504 and piston plate 503, under the tension of the spring 505, move downwards synchronously with the substrate 11. The piston plate 503 begins to compress the air bladder 502 below. The air inside the air bladder 502 is compressed and spreads into the lower cavity formed with the piston plate 503. Then, it is discharged through the vent hole 507 on the piston plate 503 into the upper cavity formed with the piston plate 503, and finally discharged through the exhaust hole 506, forming an airflow that blows onto the surface of the touchscreen to be processed. This removes dust particles from the touchscreen, preventing dust from causing air bubbles during the hot-pressing process, which could affect the quality of the process. To improve the quality of the bonding process, as the substrate 11 approaches the touchscreen, the tension of the spring 505 gradually increases, while the compression of the airbag 502 intensifies. The elastic resistance generated by the spring 505 and the reaction force of the airbag 502 gradually increase, causing the moving speed of the piston rod 504 and piston plate 503 to gradually decrease. This deceleration effect is transmitted through the substrate 11 to the pressing plate 10, significantly reducing the descent speed of the pressing plate 10 as it approaches the touchscreen. This ensures that the pressing plate 10 contacts the touchscreen surface at an extremely low speed, avoiding damage to the touchscreen due to excessive impact. Simultaneously, when the pressing plate 10 contacts the touchscreen at a slow speed, the bonding force is gradually applied to the adhesive layer; this "gradual pressure application" ensures the bonding force is applied gradually. This avoids the impact of instantaneous high pressure on the adhesive layer, allowing the pressure to be evenly transmitted to all parts of the adhesive layer. If the contact speed is too fast, the pressing force will be concentrated on the surface of the adhesive layer instantly, causing a sudden increase in local pressure. The gas will not have time to diffuse from the inside of the adhesive layer to the edge and will easily be trapped in the adhesive layer to form bubbles. Therefore, a slow contact speed helps the gas in the adhesive layer to be fully discharged under pressure, preventing gas residue from forming bubbles.

[0027] Reference Figures 3-5 Furthermore, a pressing rod 9 is fixedly installed on the side wall of the substrate 11, and a pressing hole 7 is opened on the inner wall of the support seat 3. A sensor 8 is fixedly installed on the inner wall of the pressing hole 7. The pressing rod 9 is positioned corresponding to the pressing hole 7, and the pressing rod 9 is located above the sensor 8.

[0028] It should be noted that as the substrate 11 continues to descend, the pressing rod 9 enters the pressing hole 7 and touches the sensor 8. When the pressure received by the sensor 8 is too high, it feeds a signal back to the control system, which then controls the motor 2 to stop rotating. This allows the pressing process to be controlled according to the real-time pressure, preventing damage to the touch screen due to excessive pressure and preventing insufficient pressure from affecting the stability of the pressing. At the same time, the sensor 8 also causes the control system to activate the temperature control system to heat the device, thereby controlling the temperature and preventing energy waste when not in use. After the heat pressing is completed, the motor 2 reverses and drives the lead screw 4 to rotate counterclockwise. The substrate 11 and the pressing rod 9 move upward and reset. At this time, the heating device is turned off to save energy. The spring 505 and the air bag 502 gradually return to their initial state, and the device is ready for the next working cycle.

[0029] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A touch screen hot pressing device, comprising a bearing seat (3) and a base plate (11), the bearing seat (3) is fixedly connected with a base (1), a base hole (6) is formed in the side wall of the bearing seat (3), the side wall of the base plate (11) is fixedly connected with a pressing plate (10), the pressing plate (10) corresponds to the position of the base hole (6), characterized in that, A lifting assembly (5) is fixedly installed on the inner wall of the load-bearing seat (3). The lifting assembly (5) includes a piston cylinder (501), which is fixedly connected to the inner wall of the load-bearing seat (3).

2. The touch screen hot bar apparatus of claim 1, wherein, An air bladder (502) is fixedly installed on the inner wall of the piston cylinder (501), and an exhaust hole (506) is opened on the side wall of the piston cylinder (501).

3. The touch screen hot bar apparatus of claim 2, wherein the hot bar is configured to heat the touch screen to a temperature of about 150 °C to about 200 °C. The lifting assembly (5) also includes a piston rod (504), one end of which is fixedly mounted with a piston plate (503), and the other end of which is fixedly connected to the base plate (11). A spring (505) is sleeved on the outer wall of the piston rod (504), and the two ends of the spring (505) are fixedly connected to the side wall of the piston plate (503) and the inner wall of the piston cylinder (501), respectively.

4. The touch screen hot bar apparatus of claim 3, wherein the hot bar is configured to heat the touch screen to a temperature of about 150 °C to about 200 °C. The piston rod (504) and piston plate (503) are slidably connected to the inner wall of piston cylinder (501), the piston plate (503) is fixedly connected to the side wall of airbag (502), and the side wall of piston plate (503) is provided with a vent hole (507).

5. The touch screen hot bar apparatus of claim 1, wherein the hot bar is configured to heat the touch screen to a temperature of about 150 degrees Celsius to about 200 degrees Celsius. A motor (2) is fixedly installed on the side wall of the base (1), and a lead screw (4) is fixedly installed on one end of the motor (2). The lead screw (4) is threadedly connected to the base plate (11), and a pressing rod (9) is fixedly installed on the side wall of the base plate (11).

6. The touch screen hot bar apparatus of claim 5, wherein the hot bar is configured to heat the touch screen to a temperature of about 150 °C to about 200 °C. The inner wall of the support base (3) is provided with a pressing hole (7), and a sensor (8) is fixedly installed on the inner wall of the pressing hole (7). The pressing rod (9) is positioned corresponding to the pressing hole (7) and is located above the sensor (8).

Images