Positioning and conveying device for liquid crystal module combination

Abstract

The invention discloses a positioning and conveying device for liquid crystal module combination, which belongs to the technical field of display screen conveying and comprises a conveying track frame and a plurality of liquid crystal module transfer devices, the conveying track frame is mounted on a processing station, and the conveying track frame comprises support frames positioned at two ends; the supporting frame is provided with an electric sliding rail part used for conveying the liquid crystal module transfer device and a deflection adjusting part used for rotating the liquid crystal module. The pneumatic bearing disc with the air cushion edges is matched with the pneumatic control switching device, switching is conducted between negative pressure adsorption and high-pressure air blowing, under the action of high-pressure air blowing, the pressure of the liquid crystal module is reduced through air, polaroid scratching, film layer separation or glass substrate damage caused by traditional clamping or sliding is avoided, and the production efficiency of the liquid crystal module is improved. Through differential rotation control of the deflection rack and the fluted disc, a stepped inclined conveying slope is formed, transfer is assisted by gravity, mechanical contact friction is reduced, and safe conveying of the liquid crystal module can be guaranteed through the generated slope.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen conveying, and in particular to a positioning and conveying device for liquid crystal module assembly. Background Art

[0002] Liquid crystal module assembly processing usually refers to the process of assembling liquid crystal panels, backlight sources, drive circuits, frames, etc. into LCMs. It is a precise and demanding process. The slightest carelessness may cause damage to the module or performance degradation. During the processing of liquid crystal panels, the liquid crystal panels (glass substrates) are extremely fragile. Any improper squeezing, bending, impact, or localized force may cause them to break.

[0003] Currently, in the processing of LCD modules, polarizers need to be attached to both sides of the LCD box to form an LCD screen. Then, the L-shaped wiring area (not attached with polarizers) reserved on the LCD screen is used for high-density external circuit interfaces. The external circuit interfaces are welded using various anisotropic conductive adhesive processes. At this time, the LCD module needs to be transferred at various stations to add different conductive adhesives and electrical components (wires, centralized circuit chips, etc.). During this process, the LCD module needs to be transferred frequently. Traditional sliding transfer and clamping transfer are prone to damage the polarizers. Currently, the commonly used transfer method uses suction cup adsorption to transfer LCD modules. The suction cup adsorption and transportation needs to ensure that the suction cup is located in the center of gravity area of ​​the LCD module. However, at the continuous processing station, the weight of the edge area of ​​the LCD module will continue to increase, and its center of gravity position is constantly changing, which will generate an overturning moment relative to the suction cup support point. When the suction force of the suction cup is insufficient, it is easy to cause the LCD module to fall off or slide, affecting the processing accuracy and processing efficiency. If the suction force of the suction cup is increased, it is easy to cause damage to the LCD screen. Based on this, a positioning and transportation device for LCD module assembly is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a positioning and conveying device for liquid crystal module assembly.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A positioning and conveying device for liquid crystal module assembly includes a conveying track frame installed on a processing station and a plurality of liquid crystal module transfer devices arranged on the conveying track frame corresponding to different stations. The conveying track frame includes support frames at both ends, the support frames are provided with electric slide members for conveying the liquid crystal module transfer devices, and the support frames are provided with deflection adjustment members for rotating the liquid crystal modules. The liquid crystal module transfer device is composed of two groups of track moving parts and two groups of pneumatic transfer seats. The track moving parts include an electric control slide used in conjunction with an electric slide rail. A transfer control connection seat is fixedly provided above the electric control slide, and a positioning blocking member is provided on the transfer control connection seat. The pneumatic transfer seat includes a rotating mounting seat rotatably connected to the transfer control connecting seat via a connecting shaft, a material delivery conveying seat is provided at one end of the rotating mounting seat, the material delivery conveying seat is connected to a switching slide via a material delivery pushing member, a pneumatic carrying plate is provided above the switching slide, and a pneumatic switching device is provided on the pneumatic carrying plate, the rotating mounting seat is connected to a protective back plate via a relatively moving member, and the two protective back plates are rotatably connected to each other via a torsional connecting member.

[0006] As a preferred solution, the deflection adjustment member includes a mounting platform arranged on a support frame, a plurality of vertical push rods are arranged on the mounting platform, a U-shaped connecting plate is fixedly connected to the bottom of the vertical push rod, a deflection rack of inconsistent length is arranged on the U-shaped connecting plate, and a deflection gear disk adapted to the deflection rack is arranged on the back of the rotating mounting seat.

[0007] As a preferred solution, the positioning blocking member includes an L-shaped blocking member detachably connected to the side wall of the electric slide rail member by bolts, and the L-shaped blocking member is used to position the liquid crystal module.

[0008] As a preferred solution, the material delivery pusher includes a sliding slot opened on the material delivery conveying seat, a delivery push rod is provided on the inner wall of the sliding slot, and the switching slide is located in the sliding slot and connected to the output end of the delivery push rod.

[0009] As a preferred solution, the air-controlled switching device includes a plurality of transversely arranged air cushion ridges evenly distributed on the pneumatic support plate, an airtight blocking side block is provided on one side between adjacent air cushion ridges, and an opening is provided on the other side, and a sealing strip plate is provided on the material delivery and conveying seat to seal the opening.

[0010] As a preferred solution, a centralized air cavity is provided inside the pneumatic supporting plate, and conversion air ports with inclined openings are provided between adjacent air cushion edges. The conversion air ports are connected to the centralized air cavity, and one end of the centralized air cavity is connected to a pneumatic pipe through an electromagnetic valve.

[0011] As a preferred solution, the relatively movable member includes a T-shaped limit block arranged on the rotating mounting seat, and the side wall of the protective back plate is provided with a T-shaped limit slot for the T-shaped limit block to move.

[0012] As a preferred solution, the torsion connector includes a torsion seat, and torsion balls are provided on both sides of the torsion seat, and both ends of the torsion balls are respectively connected to the side walls of the protective back plate on both sides.

[0013] As a preferred solution, the electric slide rail component includes an electric track arranged on a support frame, the electric track is provided with a connecting end, the electric track is divided into different processing stations, a sliding guide column is provided on the support frame, and a sliding pad is provided at the bottom of the electric control slide seat. The sliding pads are connected by a limiting sleeve, and the limiting sleeve is sleeved on the outer wall of the sliding guide column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a pneumatic carrier plate with air cushion edges and an air-controlled switching device to switch between negative pressure adsorption and high-pressure blowing. Under the action of high-pressure blowing, the pressure of the liquid crystal module is reduced by gas, avoiding scratches on the polarizer, film separation or damage to the glass substrate caused by traditional clamping or sliding. Through the differential rotation control of the deflection rack and the gear plate, a stepped inclined conveying slope is formed, and gravity is used to assist the transfer, reducing mechanical contact friction. The generated slope can also ensure the safe transportation of the liquid crystal module.

[0015] 2. The present invention is designed to address the constant changes in the center of gravity during the processing of liquid crystal modules. The spacing between the two electrically controlled slides is fixed by a limiting sleeve to ensure stable support for the module. The air pressure-assisted positioning of the L-shaped blocking member is combined with the synchronous adjustment of the distance between the two sets of pneumatic transfer seats to achieve the purpose of adjusting the center of gravity, offset the overturning moment caused by the increase in weight at the edge in real time, and prevent the module from falling off or sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of a positioning and conveying device for liquid crystal module assembly proposed by the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle; Figure 3 This is a schematic diagram of the positional relationship structure of a liquid crystal module transfer device in a positioning and conveying device for liquid crystal module assembly proposed by the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of a pneumatic transfer seat in a positioning and conveying device for liquid crystal module assembly proposed by the present invention; Figure 5 This is a schematic diagram of the assembly structure of a pneumatic transfer seat in a positioning and conveying device for liquid crystal module assembly proposed by the present invention; Figure 6 for Figure 5 Schematic diagram of the enlarged structure at B in the middle; Figure 7 This is a structural schematic diagram of a protective back plate in a positioning and conveying device for liquid crystal module assembly proposed by the present invention; Figure 8The figure is a schematic diagram of the conveying process of a positioning and conveying device for liquid crystal module assembly proposed by the present invention.

[0017] In the figure: 1. Support frame; 2. Electric control slide; 3. Rotation control connecting seat; 4. Rotation mounting seat; 5. Material delivery and conveying seat; 6. Switching slide; 7. Pneumatic bearing plate; 8. Protective back plate; 9. Vertical push rod; 10. Deflection rack; 11. L-shaped blocking member; 12. Sliding slot; 13. Delivery push rod; 14. Air cushion edge; 15. Airtight blocking side block; 16. Sealing strip plate; 17. Pneumatic pipe; 18. Conversion air port; 19. T-type limit block; 20. T-type limit slot; 21. Torsion seat; 22. Torsion ball; 23. Electric track; 24. Connecting end; 25. Sliding guide column; 26. Sliding pad; 27. Deflection gear disc; 28. Limit sleeve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0021] Example, see Figures 1 to 8A positioning and conveying device for liquid crystal module assembly includes a conveying track frame installed on a processing station and a plurality of liquid crystal module transfer devices arranged on the conveying track frame corresponding to different stations. The conveying track frame includes a support frame 1 located at both ends, and the support frame 1 is provided with an electric slide member for conveying the liquid crystal module transfer device. Further, the electric slide member includes an electric track 23 arranged on the support frame 1, and a connecting end 24 is provided on the electric track 23. The electric track 23 is divided into different processing stations, and different liquid crystal module transfer devices are provided corresponding to different stations to meet the processing needs of different stations. After each workstation completes the corresponding processing step, the adjacent liquid crystal module transfer device transports and transfers the processed liquid crystal modules. The specific transfer steps are detailed below. A sliding guide column 25 is provided on the support frame 1, and a sliding pad 26 is provided at the bottom of the electric control slide 2. The sliding pads 26 are connected by a limiting sleeve 28. The limiting sleeve 28 is sleeved on the outer wall of the sliding guide column 25. The setting of the limiting sleeve 28 can ensure that the two electric control slides 2 are within a fixed distance. The distance meets the support for the liquid crystal module. The setting of the sliding pad 26 ensures the stable movement of the liquid crystal module transfer device on the conveying track frame. When the center of gravity of the LCD module changes continuously during processing, the center of gravity can be adjusted by changing the distance between the two sets of pneumatic transfer seats according to the pre-set settings, thereby offsetting the overturning moment caused by the increase in weight at the edge in real time and preventing the module from falling off or sliding.

[0022] The support frame 1 is provided with a deflection adjustment member for rotating the liquid crystal module. The deflection adjustment member includes a mounting platform provided on the support frame 1, and a plurality of vertical push rods 9 are provided on the mounting platform. The vertical push rods 9 are electric push rods, which can drive the U-shaped connecting plate to move downward. It is a prior art and will not be described in detail here. The bottom of the vertical push rod 9 is fixedly connected to a U-shaped connecting plate, and a deflection rack 10 with inconsistent lengths is provided on the U-shaped connecting plate. A deflection gear disk 27 adapted to the deflection rack 10 is provided on the back of the rotating mounting seat 4. The deflection rack 10 with inconsistent lengths will contact the deflection gear disk 27 in succession during the downward movement, driving the deflection gear disk 27 to rotate in succession, thereby realizing the control of the two rotation control connecting seats 3 to rotate at inconsistent angles through the deflection racks 10 with inconsistent lengths.

[0023] The liquid crystal module transfer device is composed of two groups of track moving parts and two groups of pneumatic transfer seats. The track moving parts include an electric control slide 2 used in conjunction with an electric slide rail part. A rotation control connecting seat 3 is fixedly arranged above the electric control slide 2, and a positioning blocking member is provided on the rotation control connecting seat 3. The positioning blocking member includes an L-shaped blocking member 11 that is detachably connected to the side wall of the electric slide rail part by bolts. The detachable setting that is often liked can meet the effect of flexible adjustment corresponding to different models. The L-shaped blocking member 11 is used to position the liquid crystal module. When the rotating mounting seat 4 rotates to a certain angle, the L-shaped blocking member 11 will automatically disengage from the liquid crystal module, and will not affect the normal transportation of the liquid crystal module to the next workstation. That is, the angle of rotation of the material delivery conveyor seat 5 carrying the liquid crystal module can make the height of the L-shaped blocking member 11 lower than the height of the liquid crystal module, and the angle of rotation of the material delivery conveyor seat 5 ready to carry the liquid crystal module will be smaller than the angle of the material delivery conveyor seat 5 carrying the liquid crystal module, so it cannot be higher than the height of the L-shaped blocking member 11. At this time, the L-shaped blocking member 11 will achieve blocking positioning of the liquid crystal module.

[0024] It should be noted that polarizers are bonded on both sides of the LCD screen of the LCD module. In order to facilitate the peripheral anisotropic conductive adhesive process to solidify the terminal (integrated circuit chip), the LCD screen in the middle is often reserved with an L-shaped exposed surface for subsequent processing. The L-shaped blocking member 11 is set corresponding to a corner of the L-shaped processing surface to meet the positioning effect.

[0025] The pneumatic transfer seat includes a rotating mounting seat 4 that is rotatably connected to the transfer control connecting seat 3 through a connecting shaft. A connecting port is provided on the transfer control connecting seat 3 for the rotation of the rotating mounting seat 4. When the connecting port is in a horizontal state, the rotating mounting seat 4 cannot be rotated downward and can only be rotated upward. The bottom side walls thereof contact each other to limit the rotation. A material delivery conveying seat 5 is provided at one end of the rotating mounting seat 4. The material delivery conveying seat 5 is connected to a switching slide 6 through a material delivery pushing member. Further, the material delivery pushing member includes a sliding groove 12 provided on the material delivery conveying seat 5. A delivery push rod 13 is provided on the inner wall of the sliding groove 12. The delivery push rod 13 is a driving element, which can drive the switching slide 6 to slide in the sliding groove 12 to meet the needs of transporting the liquid crystal module from one side of the electric slide rail to the other side of the processing station, thereby achieving the effect of delivering the liquid crystal module. The switching slide 6 is in the sliding groove 12 and is connected to the output end of the delivery push rod 13.

[0026] A pneumatic bearing plate 7 is provided above the switching slide 6, and an air-controlled switching device is provided on the pneumatic bearing plate 7. Further, the air-controlled switching device includes a plurality of transversely arranged air cushion ribs 14 evenly distributed on the pneumatic bearing plate 7. The transversely arranged air cushion ribs 14 are in contact with the display screen, which can reduce the friction on the display screen and avoid scratching the display screen. An airtight blocking side block 15 is provided on one side between adjacent air cushion ribs 14, and an opening is provided on the other side. A sealing strip 16 for sealing the opening is provided on the material delivery conveying seat 5. A concentrated air cavity is provided inside the pneumatic bearing plate 7, and a conversion air port 18 with an opening inclined in an inclined direction is provided between adjacent air cushion ribs 14. The conversion air port 18 is connected to the concentrated air cavity. One end of the concentrated air cavity is connected to a pneumatic pipe 17 through an electromagnetic valve. The pneumatic pipe 17 connected to the electromagnetic valve includes a negative pressure suction pipe and a high pressure outlet pipe. The electromagnetic valve is a switching component for the pipeline, which is a prior art and will not be described in detail here. It should be noted that the switching air port 18 has two modes: high-pressure blowing and negative-pressure suction. When the liquid crystal module is moved from a processing station to the next station, the switching slide 6 is at the material transfer seat 5. When the high-pressure gas is transported outward, it can only be discharged to one side of the opening due to the obstruction of the airtight blocking side block 15. This will generate a gas driving force on the liquid crystal module, thereby transporting the liquid crystal module in a tilted state downward to the next liquid crystal module transferor, thereby realizing the transfer and transportation of the liquid crystal module. When the liquid crystal module is being processed, the switching slide 6 is in an outwardly extended state, and one side of the opening at the conversion port 18 on the pneumatic carrier plate 7 will contact the sealing strip 16 to achieve sealing on one side of the opening. The conversion port 18 can generate suction to adsorb the liquid crystal module on the pneumatic carrier plate 7, thereby ensuring that the liquid crystal module is in an adsorbed and positioned state during the processing of the liquid crystal module, thereby ensuring the processing accuracy.

[0027] The rotating mounting seat 4 is connected to the protective back plate 8 through a relatively movable part. The relatively movable part includes a T-shaped limit block 19 arranged on the rotating mounting seat 4. The side wall of the protective back plate 8 is provided with a T-shaped limit groove 20 for the T-shaped limit block 19 to move. The design of the two can achieve relative sliding between the protective back plate 8 and the rotating mounting seat 4.

[0028] The two protective back panels 8 are rotationally connected to each other through a torsion connector, which includes a torsion seat 21. Torsion balls 22 are provided on both sides of the torsion seat 21. The two ends of the torsion balls 22 are respectively connected to the side walls of the protective back panels 8 on both sides. The setting of the torsion connector can meet the rotational connection between the two protective back panels 8.

[0029] The present invention assembles and processes the liquid crystal module, transfers the liquid crystal module on the workstation through the liquid crystal module transferor, and controls the liquid crystal module placed on the pneumatic carrier plate 7 to move through the electric control slide 2. At the connection end 24, the electric control slide 2 is blocked and cannot move. At this time, the corresponding vertical push rod 9 is controlled to drive the deflection rack 10 to move downward. The length of the deflection rack 10 away from the connection end 24 is longer, and it will contact the deflection gear disk 27 set inside the rotating mounting seat 4 first, so that the rotating mounting seat 4 rotates first, and the liquid crystal module originally in the horizontal state will be rotated to a certain angle. At this time, the rotation angle of the liquid crystal module transferor corresponding to the next workstation is controlled to be smaller than that of the liquid crystal module transferor carrying the liquid crystal module. Angle, at this time, the rotating LCD module is protected by the angle between the material delivery and conveying seat 5 and the electric control slide 2 during transportation, which can ensure the safety of the pneumatic transportation process, and the angle of each material delivery and conveying seat 5 gradually decreases during the transportation process, which can form an inclined slope for transportation, ensuring that the LCD module can be accurately transported and avoid being blocked by the LCD module. During the pneumatic transportation process, high-pressure gas is delivered to the pneumatic carrier plate 7 through the pneumatic pipe 17. Due to the opening direction of the conversion gas port 18, pneumatic thrust is generated. Under the joint action of the inclined angle, the LCD module can be quickly and accurately transported to the next workstation, thereby realizing the transportation of the LCD module and effectively avoiding scratches on the LCD module and separation of the LCD module film layer. When processing the liquid crystal module at a workstation, the distance between the two electrically controlled slides 2 needs to be adjusted according to the processing position to ensure that the distance between the electrically controlled slides 2 provided with the L-shaped stopper 11 remains unchanged during stable processing, and the distance between the electrically controlled slides 2 is adjusted by controlling the other electrically controlled slide 2. During the adjustment process, high-pressure gas is constantly used to ensure that sufficient driving force is applied to the liquid crystal module to ensure that the liquid crystal module is always in contact with the L-shaped stopper 11 during adjustment, thereby avoiding movement and dislocation of the liquid crystal module during movement. During processing, the delivery push rod 13 drives the switching slide 6 to move, and drives the liquid crystal module placed on the pneumatic carrier plate 7 to move, and transports it horizontally to the processing station. At the processing station, suction is generated by the conversion air port 18 to adsorb the liquid crystal module on the pneumatic carrier plate 7, thereby ensuring that during the processing of the liquid crystal module, the liquid crystal module is in an adsorbed and positioned state, ensuring the processing accuracy, and avoiding the movement of the liquid crystal module during processing at the processing station.

[0030] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A positioning and conveying device for liquid crystal module assembly, comprising a conveying track frame mounted on a processing station and a plurality of liquid crystal module transfer devices arranged on the conveying track frame corresponding to different stations, characterized in that: The conveying track frame comprises support frames (1) located at both ends, the support frames (1) are provided with electric slide rails for conveying the liquid crystal module transfer device, and the support frames (1) are provided with deflection adjustment members for rotating the liquid crystal module; The liquid crystal module transfer device is composed of two groups of track moving parts and two groups of pneumatic transfer seats. The track moving parts include an electric control slide (2) used in conjunction with an electric slide rail part. A transfer control connection seat (3) is fixedly provided above the electric control slide (2). A positioning blocking member is provided on the transfer control connection seat (3). The pneumatic transfer seat includes a rotating mounting seat (4) rotatably connected to the transfer control connecting seat (3) via a connecting shaft, a material delivery conveying seat (5) is provided at one end of the rotating mounting seat (4), the material delivery conveying seat (5) is connected to a switching slide (6) via a material delivery pushing member, a pneumatic bearing plate (7) is provided above the switching slide (6), and a pneumatic switching device is provided on the pneumatic bearing plate (7), the rotating mounting seat (4) is connected to a protective back plate (8) via a relatively movable member, and the two protective back plates (8) are rotatably connected to each other via a torsion connecting member.

2. A positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The deflection adjustment member comprises a mounting platform arranged on a support frame (1), a plurality of vertical push rods (9) are arranged on the mounting platform, a U-shaped connecting plate is fixedly connected to the bottom of the vertical push rod (9), a deflection rack (10) of inconsistent length is arranged on the U-shaped connecting plate, and a deflection gear disk (27) adapted to the deflection rack (10) is arranged on the back of the rotating mounting seat (4).

3. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The positioning blocking member comprises an L-shaped blocking member (11) detachably connected to the side wall of the electric slide rail member by bolts, and the L-shaped blocking member (11) is used to position the liquid crystal module.

4. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The material delivery pusher comprises a sliding slot (12) provided on the material delivery conveying seat (5), a delivery push rod (13) is provided on the inner wall of the sliding slot (12), and the switching slide (6) is located in the sliding slot (12) and is connected to the output end of the delivery push rod (13).

5. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The pneumatic switching device comprises a plurality of transversely arranged air cushion ridges (14) uniformly distributed on the pneumatic carrier plate (7), an airtight blocking side block (15) is provided on one side between adjacent air cushion ridges (14), and an opening is provided on the other side, and a sealing strip plate (16) for sealing the opening is provided on the material transfer and conveying seat (5).

6. The positioning and conveying device for liquid crystal module assembly according to claim 5, characterized in that: A centralized air cavity is provided inside the pneumatic bearing plate (7), and a conversion air port (18) with an opening facing obliquely is provided between adjacent air cushion edges (14). The conversion air port (18) is connected to the centralized air cavity, and one end of the centralized air cavity is externally connected to a pneumatic connecting pipe (17) via a solenoid valve.

7. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The relatively movable member comprises a T-shaped limit block (19) arranged on the rotating mounting seat (4), and a T-shaped limit slot (20) for the T-shaped limit block (19) to move is provided on the side wall of the protective back plate (8).

8. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The torsion connector comprises a torsion seat (21), torsion balls (22) are provided on both sides of the torsion seat (21), and both ends of the torsion balls (22) are respectively connected to the side walls of the protective back plate (8) on both sides.

9. The positioning and conveying device for liquid crystal module assembly according to claim 1, characterized in that: The electric slide rail member comprises an electric track (23) arranged on a support frame (1), a connecting end (24) is provided on the electric track (23), and the electric track (23) is divided to correspond to different processing stations. A sliding guide column (25) is provided on the support frame (1), and a sliding pad (26) is provided at the bottom of the electric control slide (2). The sliding pads (26) are connected by a limiting sleeve (28), and the limiting sleeve (28) is sleeved on the outer wall of the sliding guide column (25).

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