A device for detecting the strength of connection points of liquid crystal display modules

Abstract

The present invention belongs to the technical field of physical and mechanical detection of the strength of the welding connection of the liquid crystal screen line, and specifically relates to a detection device for the strength of the connection point of the liquid crystal display module, including a positioning tool, a tension transmission adhesive strip, a torsion device, a tension pressure sensor, a wire collection wheel and a wire pulling mechanism; the positioning tool is used for the placement and fixation of the liquid crystal display module; the inner ring wall of the torsion ring seat of the torsion device is provided with a torsion gear ring; the center seat is fixed in the torsion gear ring; a plurality of front and rear sliders are connected to the center seat; the gear connected to the drive motor is meshed with the torsion gear ring; and a plurality of tension transmission adhesive strips are arranged between the positioning tool and the torsion device. In this scheme, when different front and rear sliders slide, tension is applied to different parts of the liquid crystal screen line, and the tension is detected by the tension pressure sensor. When the torsion gear ring rotates, the tension direction of the liquid crystal screen line changes, so as to realize the strength detection at the connection point between the liquid crystal screen line and the liquid crystal display module.

Description

Technical Field

[0001] This invention belongs to the field of physical and mechanical testing technology for the welding connection strength of liquid crystal screen cables, and specifically relates to a testing device for the strength of connection points in liquid crystal display modules. Background Technology

[0002] Liquid crystal display modules, also known as liquid crystal modules, liquid crystal display modules, liquid crystal displays, etc., are mostly small liquid crystal display modules that are connected to external devices through liquid crystal screen cables. After the liquid crystal screen cable is soldered to the liquid crystal display module, the connection strength of the solder joint determines the stability, reliability, and lifespan of the liquid crystal display module.

[0003] In existing technologies, after the LCD screen wires are soldered, the solder joints are checked by visual inspection and manual pulling to ensure they are secure. However, this method has a large margin of error, and excessive pulling force can cause some solder joints to fall off, affecting the normal use of the LCD display module.

[0004] Therefore, it is necessary to design a testing device that can achieve standardized testing of the welding connection strength of LCD screen wires. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, this solution provides a device for detecting the strength of connection points in liquid crystal display modules.

[0006] The technical solution adopted in this invention is as follows:

[0007] A device for detecting the strength of connection points in a liquid crystal display module includes a positioning fixture, a tension transmission adhesive strip, a torsion device, a tension / compression sensor, a wire feeding wheel, and a wire pulling mechanism.

[0008] The positioning fixture is used for placing and fixing the liquid crystal display module, and the liquid crystal screen cable connected to the liquid crystal display module extends from the rear side of the positioning fixture.

[0009] The torsion device is located on the rear side of the positioning fixture. The torsion device includes a torsion ring seat, a drive motor, a torsion gear ring, a center seat, and front and rear sliders. The torsion ring seat is a vertically oriented ring with an annular groove on its inner wall. The torsion gear ring is positioned within the annular groove and can rotate on the vertical surface. The center seat is a flat strip and fixed within the torsion gear ring. Multiple front and rear sliders are slidably connected to the center seat and can slide in the front-to-back direction. The gear connected to the drive motor meshes with the torsion gear ring.

[0010] Multiple tension-transmitting adhesive strips are set between the positioning fixture and the torsion device. The front ends of the multiple tension-transmitting adhesive strips are bonded to different positions in the width direction of the LCD screen, and the rear ends of the multiple tension-transmitting adhesive strips are bonded to the tension and pressure sensors at the front ends of different front and rear sliders.

[0011] When different front and rear sliders slide back and forth, they can apply tension to different parts of the LCD screen cable, and the tension value can be detected by tension and pressure sensors. When the torsion ring rotates, it can change the direction of the tension of the LCD screen cable, thereby realizing the strength detection at the connection point between the LCD screen cable and the LCD display module.

[0012] As an alternative or supplement to the above-mentioned testing device: when there are three tension-transmitting adhesive strips, the front ends of the three tension-transmitting adhesive strips are respectively attached to the left, middle and right parts of the LCD screen line; when there are two tension-transmitting adhesive strips, the front ends of the two tension-transmitting adhesive strips are respectively attached to the left and right parts of the LCD screen line.

[0013] As an alternative or supplement to the above-mentioned detection device: when there are three tension transmission adhesive strips, the middle tension transmission adhesive strip is located on the axis of the torsion toothed ring.

[0014] As an alternative or supplement to the above-mentioned testing device: the front ends of multiple tension-transmitting adhesive strips are connected to the same front grip head, and the front grip head is not connected to the LCD screen line; the rear ends of multiple tension-transmitting adhesive strips are connected to the same rear grip head, and the rear grip head is not connected to the front and rear sliders; before use, an upper protective film is attached to the upper surface of the tension-transmitting adhesive strip and a lower protective film is attached to the lower surface.

[0015] As an alternative or supplement to the above-mentioned testing device: the positioning fixture includes a lower mounting base, a lower positioning fixture, an upper positioning fixture, an upper base, and a lower pressing telescopic cylinder; a first fixture mounting position is provided on the top surface of the lower mounting base, the lower positioning fixture is mounted on the first fixture mounting position and detachably connected to the lower mounting base, and a lower groove for matching placement of the lower part of the liquid crystal display module is provided on the top surface of the lower positioning fixture; an upper base is provided below the lower pressing telescopic cylinder, and the upper base is connected to the piston rod of the lower pressing telescopic cylinder; a second fixture mounting position is provided on the bottom surface of the upper base, the upper positioning fixture is mounted on the second fixture mounting position and detachably connected to it, the upper positioning fixture is located directly above the lower positioning fixture, and an upper groove for matching placement of the upper part of the liquid crystal display module is provided on the lower surface of the upper positioning fixture.

[0016] As an alternative or supplement to the above-mentioned testing device: a camera is provided on the rear side of the upper base. The camera is fixed to the upper base by an L-shaped camera bracket. The camera faces the connection point between the screen cable and the liquid crystal display module, so as to facilitate manual observation of whether the liquid crystal screen cable warps under tension.

[0017] As an alternative or supplement to the above-mentioned detection device: the forward and backward movement of the front and rear sliders is achieved by an electromagnetic mechanism or a wire pulling mechanism; the electromagnetic mechanism includes a magnet mounted on the front and rear sliders and an electromagnetic coil mounted on the central mounting seat; the wire pulling mechanism is connected to the corresponding front and rear sliders by a wire and is used to pull the wire, multiple wires are wound around the same wire gathering wheel, and the wire gathering wheel gathers the wires on the rear side of the front and rear sliders, and the gathering position is close to the axis of the torsion tooth ring.

[0018] As an alternative or supplement to the above-mentioned detection device: the pull-wire mechanism corresponds one-to-one with the front and rear sliders, and multiple pull-wire mechanisms are arranged side by side in the left and right direction. A wire divider is provided below the pull-wire mechanism, and the pull wire passes through the wire divider and is connected to the corresponding pull-wire mechanism.

[0019] As an alternative or supplement to the above-mentioned detection device: the pull-wire mechanism includes a pneumatic control cylinder, a solenoid valve, a pneumatic transmission cylinder, and a limit adjustment cylinder; the upper end of the pneumatic transmission cylinder is connected to the pneumatic control cylinder through the solenoid valve, and a pneumatic control piston connected to a pneumatic telescopic cylinder is provided inside the pneumatic control cylinder; the limit adjustment cylinder is threadedly connected to the lower end of the pneumatic transmission cylinder, and the limit adjustment cylinder is sealed within the pneumatic transmission cylinder; a tension transmission piston is provided inside the limit adjustment cylinder, the upper end of the limit adjustment cylinder is connected to the pneumatic transmission cylinder, and the pull wire passes through the lower end of the limit adjustment cylinder and is connected to the tension transmission piston; when the pneumatic control piston moves up and down and controls the pressure change in the pneumatic transmission cylinder, the tension transmission piston will move up and down to pull or release the pull wire.

[0020] As an alternative or supplement to the above-mentioned detection device: an upper opening is provided on the upper side wall of the pneumatic transmission cylinder, and a safety protection sheet is provided on the upper opening. The safety protection sheet can rupture when the pressure difference between the inside and outside of the pneumatic transmission cylinder exceeds a set value; a lower opening is provided on the lower side wall of the pneumatic transmission cylinder, and a pressure sensor is provided on the lower opening. The pressure sensor is used to detect the gas pressure of the pneumatic transmission cylinder.

[0021] The beneficial effects of this invention are as follows:

[0022] In this solution, by sliding different front and rear sliders back and forth, tension can be applied to different parts of the LCD screen cable, thereby achieving traction and monitoring at different positions. The tension value is detected by a tension and compression sensor. If the tension value curve is stable, it indicates that the welding point connection is reliable. If the tension value changes, it indicates that the welding point connection is unreliable. In addition, this solution can change the direction of tension on the LCD screen cable by rotating the torsion ring, thereby realizing the connection strength detection of the welding connection point between the LCD screen cable and the LCD display module under different working conditions. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a schematic diagram of the detection device in this scheme;

[0025] Figure 2 This is a schematic diagram of the combined structure of the liquid crystal display module, the tension transmission adhesive strip, and the torsion device.

[0026] Figure 3 This is a detailed structural diagram of the adhesive strip used for transmitting tensile force;

[0027] Figure 4 This is a detailed structural diagram of the wire pulling mechanism;

[0028] Figure 5 This is a detailed structural diagram of the limit adjustment cylinder.

[0029] In the diagram: 1-Positioning fixture; 11-Lower mounting base; 12-Lower positioning jig; 13-Upper positioning jig; 14-Upper base; 15-Lower pressure telescopic cylinder; 2-LCD display module; 21-LCD screen cable; 3-Tension transmission adhesive strip; 31-Front grip head; 32-Lower protective film; 33-Rear grip head; 34-Upper protective film; 4-Torsion device; 41-Torsion ring seat; 42-Drive motor; 43-Torsion gear ring; 44-Center seat; 45-Front and rear sliders; 5-Tension and pressure sensor; 6-Pull wire; 7-Wire gathering wheel; 8-Wire splitter ring; 9-Pull wire mechanism; 91-Pneumatic telescopic cylinder; 92-Pneumatic control piston; 93-Pneumatic control cylinder; 94-Solenoid valve; 95-Pneumatic transmission cylinder; 96-Safety protection sheet; 97-Pneumatic sensor; 98-Tension transmission piston; 99-Limit adjustment cylinder; 10-Camera; 101-Camera bracket. Detailed Implementation

[0030] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0031] Example 1

[0032] like Figures 1 to 5 As shown, this embodiment designs a device for detecting the strength of the connection point of a liquid crystal display module, including a positioning fixture 1, a tension transmission adhesive strip 3, a torsion device 4, a tension and pressure sensor 5, a wire gathering wheel 7, and a wire pulling mechanism 9.

[0033] The positioning fixture 1 is used for placing and fixing the liquid crystal display module 2, and the liquid crystal screen cable 21 connected to the liquid crystal display module 2 extends out from the rear side of the positioning fixture 1.

[0034] The positioning fixture 1 includes components such as a lower mounting base 11, a lower positioning fixture 12, an upper positioning fixture 13, an upper base 14, and a downward pressing telescopic cylinder 15. A first fixture mounting position is provided on the top surface of the lower mounting base 11. The lower positioning fixture 12 is mounted on the first fixture mounting position and detachably connected to the lower mounting base 11. When the model of the LCD module 2 is different, the lower positioning fixture 12 can also be replaced with the corresponding model. A lower groove is provided on the top surface of the lower positioning fixture 12 for matching placement of the lower part of the LCD module 2. During testing, the LCD module 2 is placed into the lower groove. The upper base 14 is located below the downward pressing telescopic cylinder 15. The upper base 14 is connected to the piston rod of the downward pressing telescopic cylinder 15. When the piston rod extends downward, the upper base 14 will move downward. The lower surface of the upper base 14 is provided with a second fixture mounting position. The upper positioning fixture 13 is mounted on the second fixture mounting position. The upper positioning fixture 13 is detachably connected to the upper base 14, so that when different models of LCD display modules 2 are replaced for testing, the lower positioning fixture 12 can also be replaced with the corresponding model. The upper positioning fixture 13 is located directly above the lower positioning fixture 12. The lower surface of the upper positioning fixture 13 is provided with an upper groove for matching the upper part of the LCD display module 2. When the upper positioning fixture 13 is pressed down on the LCD display module 2, the LCD display module 2 can be positioned. At the same time, the upper positioning fixture 13 or the lower positioning fixture 12 should have a notch to expose the LCD screen line 21.

[0035] The torsion device 4 is located on the rear side of the positioning fixture 1. The torsion device 4 includes a torsion ring seat 41, a drive motor 42, a torsion gear ring 43, a center seat 44, and front and rear sliders 45. The torsion ring seat 41 is a vertically oriented ring with an annular groove on its inner wall. The torsion gear ring 43 is positioned within the annular groove and can rotate along it. The torsion gear ring 43 rotates on a vertical plane, with its plane of rotation perpendicular to the front-rear direction. The center seat 44 is a flat strip and fixed within the torsion gear ring 43. Both ends of the center seat 44 are fixedly connected to the inner wall of the torsion gear ring 43, allowing it to rotate with the torsion gear ring 43. Multiple front and rear sliders 45 are slidably connected to the center seat 44. Tracks are provided at the bottom of each slider 45, and T-shaped grooves are provided on the upper surface of the center seat 44. The tracks extend into the T-shaped grooves and slide in cooperation with them, allowing the sliders 45 to slide in the front-rear direction. The gear connected to the drive motor 42 meshes with the torsion ring 43; when the drive motor 42 starts and rotates in both directions, it can drive the torsion ring 43 to rotate in different directions.

[0036] Multiple tension-transmitting adhesive strips 3 are disposed between the positioning fixture 1 and the torsion device 4. The lower surfaces of the front and rear ends of the tension-transmitting adhesive strips 3 should have adhesive. The tension-transmitting adhesive strips 3 are generally made of tensile-resistant material. The front ends of the multiple tension-transmitting adhesive strips 3 are adhered to different positions along the width of the LCD screen line 21. Specifically: when there are three tension-transmitting adhesive strips 3, the front ends of the three strips are respectively adhered to the left, center, and right parts of the LCD screen line 21; when there are two strips, the front ends of the two strips are respectively adhered to the left and right parts of the LCD screen line 21. A tension / compression sensor 5 is fixed to the front end of each front and rear slider 45, and the rear ends of the multiple tension-transmitting adhesive strips 3 are correspondingly adhered to the tension / compression sensors 5 at the front ends of different front and rear sliders 45.

[0037] When the different front and rear sliders 45 slide back and forth, they can pull the corresponding force-transmitting adhesive strip 3, thereby applying tension to different parts of the LCD screen cable 21. During this process, the tension and pressure sensor 5 can detect the tension value borne by the LCD screen cable 21 in real time, realizing the strength detection at the connection point between the LCD screen cable 21 and the LCD display module 2. In addition, when the torsion ring 43 rotates, it can change the position of the rear end of the force-transmitting adhesive strip 3, thereby changing the direction of the tension on the LCD screen cable 21, thus simulating the strength detection of the welded connection point when the LCD screen cable 21 is subjected to tension in different directions. Furthermore, since each front and rear slider 45 can move independently, the resultant force of the tension borne by the LCD screen cable 21 is more diverse.

[0038] When there are three tension-transmitting adhesive strips 3, the middle tension-transmitting adhesive strip 3 can be located on the axis of the torsion ring 43, so that the tension and direction on the tension-transmitting adhesive strip 3 do not change with the rotation of the torsion ring seat 41.

[0039] The front ends of multiple tension-transmitting adhesive strips 3 are connected to the same front gripping head 31. No adhesive is applied to the front gripping head 31, preventing it from adhering to the LCD screen cable 21. When replacing another LCD module for testing, the tension-transmitting adhesive strip 3 can be peeled off from the front gripping head 31 and then adhered to the LCD screen cable 21 of the other LCD module. The front gripping head 31 can be E-shaped or U-shaped to reduce the restriction on movement when adjacent tension-transmitting adhesive strips 3 shift. Similarly, the rear ends of multiple tension-transmitting adhesive strips 3 are connected to the same rear gripping head 33. The rear gripping head 33 is not adhered to the front and rear sliders 45. The front gripping head 31 can also be E-shaped or U-shaped. Before use, an upper protective film 34 is attached to the upper surface of the tension-transmitting adhesive strip 3, and a lower protective film 32 is attached to the lower surface to protect the adhesive on the tension-transmitting adhesive strip 3.

[0040] A camera 10 is installed on the rear side of the upper base 14. The camera 10 is fixed to the upper base 14 by an L-shaped camera bracket 101. The camera 10 faces the connection point between the screen cable and the liquid crystal display module 2, so as to facilitate manual observation of whether the liquid crystal screen cable 21 warps under tension. Since the liquid crystal screen cable 21 has a certain width and multiple welding connection points in its width direction, when the liquid crystal screen cable 21 is subjected to different tensile forces that transmit inconsistent tensile forces from the adhesive strip 3, some of the welding connection points of the liquid crystal screen cable 21 with poor soldering will fall off, and the liquid crystal screen cable 21 will warp. By observing whether the liquid crystal screen cable 21 warps through the camera 10, the accuracy of judging whether the welding connection of the liquid crystal screen cable 21 is firm can be increased.

[0041] The forward and backward movement of the front and rear sliders 45 can be achieved by existing electric or pneumatic telescopic cylinders, or by an electromagnetic mechanism or a wire-pulling mechanism 9. The electromagnetic mechanism includes a magnet and an electromagnetic coil. When using the electromagnetic mechanism, the magnet is installed on the front and rear sliders 45, and the electromagnetic coil is installed at the corresponding position on the center seat 44, so that the electromagnetic coil can generate repulsive or attractive forces to control the forward and backward movement of the front and rear sliders 45. Furthermore, by controlling the electrical power of the electromagnetic coil, the magnitude of the tension on the LCD screen cable 21 can be varied. The wire-pulling mechanism 9 is used by pulling a pull wire 6, which in turn pulls the front and rear sliders 45 connected to it. When the wire-pulling mechanism 9 pulls the pull wire 6, it can control the backward movement of the front and rear sliders 45. Multiple pull wires 6 are wound around the same wire-collecting wheel 7. The wire-collecting wheel 7 has multiple wire-collecting grooves, and the distance between adjacent wire-collecting grooves is generally no more than 1 mm, allowing the pull wires 6 to be inserted into the corresponding wire-collecting grooves. The wire gathering wheel 7 gathers the pull wires 6 on the rear side of the front and rear sliders 45, thereby reducing the influence of the rotation of the torsion ring 43 on the sliding position of the front and rear sliders 45. The gathering position of the multiple pull wires 6 is close to the axis of the torsion ring 43.

[0042] The pull-wire mechanism 9 corresponds one-to-one with the front and rear sliders 45. Multiple pull-wire mechanisms 9 are arranged side by side in the left and right direction. A wire divider ring 8 is provided below each pull-wire mechanism 9. The pull wire 6 passes through the wire divider ring 8 and is connected to the corresponding pull-wire mechanism 9.

[0043] The cable pulling mechanism 9 includes components such as a pneumatic control cylinder 93, a solenoid valve 94, a pneumatic transmission cylinder 95, and a limit adjustment cylinder 99. The upper end of the pneumatic transmission cylinder 95 is connected to the pneumatic control cylinder 93 via the solenoid valve 94. The pneumatic control cylinder 93 contains a pneumatic control piston 92 connected to a pneumatic telescopic cylinder 91. When the pneumatic control piston 92 moves upward, a negative pressure is generated within the pneumatic control cylinder 93, allowing air to be drawn from the pneumatic transmission cylinder 95 and its pressure reduced. When the solenoid valve 94 is open, the air pressure in the pneumatic transmission cylinder 95 and the pneumatic control cylinder 93 changes synchronously. When the solenoid valve 94 is closed, the pressure in the pneumatic transmission cylinder 95 can be controlled instantaneously at the moment the solenoid valve 94 is opened.

[0044] The limiting adjustment cylinder 99 is threadedly connected to the lower end of the pneumatic transmission cylinder 95, and the limiting adjustment cylinder 99 is sealed within the pneumatic transmission cylinder 95. A force transmission piston 98 is installed inside the limiting adjustment cylinder 99. The upper end of the limiting adjustment cylinder 99 is connected to the pneumatic transmission cylinder 95, and the pull wire 6 passes through the lower end of the limiting adjustment cylinder 99 and is connected to the force transmission piston 98. When the limiting adjustment cylinder 99 is rotated, its position can be adjusted, thereby adjusting the initial position of the force transmission piston 98. The upper and lower parts of the limiting adjustment cylinder 99 have inwardly extending protrusions, which limit the vertical movement of the force transmission piston 98.

[0045] When the pneumatic control piston 92 moves up and down to control the pressure change in the pneumatic transmission cylinder 95, the force transmission piston 98 will move up and down to pull or release the pull cable 6. When the pressure in the pneumatic transmission cylinder 95 changes slowly or instantaneously, the force transmission piston 98 will also apply a slowly changing or instantaneously changing tension to the pull cable 6. The different tensions applied to the pull cable 6 will be transmitted to the LCD screen cable 21, causing the LCD screen cable 21 to experience slowly changing or instantaneously changing tensions.

[0046] The upper side wall of the pneumatic transmission cylinder 95 has an upper opening, on which a safety protection sheet 96 is installed. The safety protection sheet 96 is designed to rupture when the pressure difference between the inside and outside of the pneumatic transmission cylinder 95 exceeds a set value, thus preventing excessive pressure difference from negatively impacting the wire-pulling mechanism 9 and the detection of the welding connection point. The lower side wall of the pneumatic transmission cylinder 95 has a lower opening, on which a pressure sensor 97 is installed. The pressure sensor 97 detects the gas pressure in the pneumatic transmission cylinder 95 to assist in determining the strength of the welding connection point.

[0047] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A device for detecting the strength of connection points of a liquid crystal display module, characterized in that: It comprises a positioning tool (1), a tension transmission adhesive strip (3), a torsion device (4), a tension pressure sensor (5), a wire collection wheel (7) and a wire pulling mechanism (9); The positioning tool (1) is used to place and fix the liquid crystal display module (2), and the liquid crystal screen line (21) connected to the liquid crystal display module (2) extends from the rear side of the positioning tool (1); The twisting device (4) is arranged at the rear side of the positioning tool (1), and comprises a twisting ring seat (41), a driving motor (42), a twisting gear ring (43), a center seat (44) and front and rear sliders (45); the twisting ring seat (41) is in the shape of an upright circular ring, an annular slide groove is arranged on the inner ring wall of the twisting ring seat (41), and the twisting gear ring (43) is arranged in the annular slide groove and can rotate on the upright surface; the center seat (44) is in the shape of a flat strip and is fixed in the twisting gear ring (43); a plurality of front and rear sliders (45) are slidably connected to the center seat (44), and the front and rear sliders (45) can slide in the front and rear directions; the gear connected to the driving motor (42) is meshed with the twisting gear ring (43); A plurality of tension transmission adhesive strips (3) are arranged between the positioning tool (1) and the torsion device (4), the front ends of the plurality of tension transmission adhesive strips (3) are bonded to different positions in the width direction of the liquid crystal screen line (21), and the rear ends of the plurality of tension transmission adhesive strips (3) are bonded to the tension pressure sensors (5) at the front ends of different front and rear sliders (45); When different front and rear sliders (45) slide forward and backward, tension can be applied to different parts of the liquid crystal screen line (21), and the tension value can be detected by the tension pressure sensor (5). When the twisting gear ring (43) rotates, the tension direction of the liquid crystal screen line (21) can be changed, thereby realizing strength detection at the connection point between the liquid crystal screen line (21) and the liquid crystal display module (2); The forward and backward movement of the front and rear sliders (45) is realized by an electromagnetic mechanism or a wire pulling mechanism (9); the electromagnetic mechanism includes a magnet installed on the front and rear sliders (45) and an electromagnetic coil installed on the center seat (44); the wire pulling mechanism (9) is connected to the corresponding front and rear sliders (45) through a wire pulling wire (6) and is used to pull the wire pulling wire (6), and multiple wire pulling wires (6) are wound around the same wire gathering wheel (7), and the wire gathering wheel (7) gathers the wire pulling wires (6) on the rear side of the front and rear sliders (45), and the gathering position is close to the axis of the torsion gear ring (43).

2. The device for detecting the connection point strength of a liquid crystal display module according to claim 1, characterized in that: When there are three tension transmission adhesive strips (3), the front ends of the three tension transmission adhesive strips (3) are respectively bonded to the left, middle and right positions of the liquid crystal screen line (21); when there are two tension transmission adhesive strips (3), the front ends of the two tension transmission adhesive strips (3) are respectively bonded to the left and right positions of the liquid crystal screen line (21).

3. The device for detecting the strength of connection points of liquid crystal display modules according to claim 2, characterized in that: When there are three tension transmission adhesive strips (3), the middle tension transmission adhesive strip (3) is located on the axis of the torsion gear ring (43).

4. The device for detecting the connection point strength of a liquid crystal display module according to claim 3, characterized in that: The front ends of the plurality of tension transmission adhesive strips (3) are connected to the same front holding head (31), and the front holding head (31) is not adhered to the liquid crystal screen line (21); the rear ends of the plurality of tension transmission adhesive strips (3) are connected to the same rear holding head (33), and the rear holding head (33) is not adhered to the front and rear sliders (45); before use, an upper protective film (34) is attached to the upper surface of the tension transmission adhesive strip (3), and a lower protective film (32) is attached to the lower surface.

5. The device for detecting the strength of connection points of liquid crystal display modules according to any one of claims 1 to 4, characterized in that: The positioning tool (1) comprises a lower mounting base (11), a lower positioning fixture (12), an upper positioning fixture (13), an upper base (14) and a downward-pressing telescopic cylinder (15); a first fixture mounting position is arranged on the top surface of the lower mounting base (11); the lower positioning fixture (12) is arranged on the first fixture mounting position and is detachably connected to the lower mounting base (11); a lower groove for matching and placing the lower part of the liquid crystal display module (2) is arranged on the top surface of the lower positioning fixture (12); An upper base (14) is provided below the compression and telescopic cylinder (15), and the upper base (14) is connected to the piston rod of the compression and telescopic cylinder (15); a second fixture installation position is provided on the lower bottom surface of the upper base (14), and an upper positioning fixture (13) is installed on the second fixture installation position and is detachably connected thereto; the upper positioning fixture (13) is located directly above the lower positioning fixture (12), and an upper groove for matching and placing the upper part of the liquid crystal display module (2) is provided on the lower surface of the upper positioning fixture (13).

6. The device for detecting the strength of connection points of liquid crystal display modules according to claim 5, characterized in that: A camera (10) is arranged on the rear side of the upper base (14); the camera (10) is fixed to the upper base (14) via an L-shaped camera bracket (101); the camera (10) faces the connection point between the screen cable and the liquid crystal display module (2), so as to facilitate manual observation of whether the liquid crystal screen cable (21) is warped under the action of tension.

7. The device for detecting the connection point strength of a liquid crystal display module according to any one of claims 1 to 4, characterized in that: The wire pulling mechanisms (9) correspond to the front and rear sliders (45) one by one, and a plurality of wire pulling mechanisms (9) are arranged side by side in the left-right direction. A wire dividing ring (8) is correspondingly arranged below the wire pulling mechanisms (9), and the wire pulling wire (6) passes through the wire dividing ring (8) and is connected to the corresponding wire pulling mechanism (9).

8. The device for detecting the strength of connection points of liquid crystal display modules according to claim 7, characterized in that: The wire pulling mechanism (9) comprises an air pressure control cylinder (93), an electromagnetic valve (94), an air pressure transmission cylinder (95) and a limit adjustment cylinder (99); the upper end of the air pressure transmission cylinder (95) is connected to the air pressure control cylinder (93) via the electromagnetic valve (94); the air pressure control cylinder (93) is provided with an air pressure control piston (92) connected to the air pressure telescopic cylinder (91); the limit adjustment cylinder (99) is threadedly connected to the lower end of the air pressure transmission cylinder (95 ... 9) is sealed in the pneumatic transmission cylinder (95); a tension transmission piston (98) is arranged in the limit adjustment cylinder (99), the upper end of the limit adjustment cylinder (99) is connected to the pneumatic transmission cylinder (95), and the pull wire (6) passes through the lower end of the limit adjustment cylinder (99) and is connected to the tension transmission piston (98); when the pneumatic control piston (92) moves up and down and controls the pressure change in the pneumatic transmission cylinder (95), the tension transmission piston (98) will move up and down to pull or relax the pull wire (6).

9. The device for detecting the strength of connection points of liquid crystal display modules according to claim 8, characterized in that: An upper side opening is provided on the upper side wall of the pneumatic transmission cylinder (95), and a safety protection sheet (96) is provided on the upper side opening. The safety protection sheet (96) can rupture when the pressure difference between the inside and outside of the pneumatic transmission cylinder (95) exceeds a set value; a lower side opening is provided on the lower side wall of the pneumatic transmission cylinder (95), and a pneumatic pressure sensor (97) is provided on the lower side opening. The pneumatic pressure sensor (97) is used to detect the gas pressure of the pneumatic transmission cylinder (95).

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