Friction alignment device of liquid crystal display

Abstract

The utility model relates to the technical field of alignment film alignment, in particular to a liquid crystal display friction alignment device which comprises a supporting bottom plate, a first triangular block and a second triangular block, a movable frame is arranged above the supporting bottom plate, the inner side of the movable frame is rotatably connected with a friction roller, and the left side of the friction roller is fixedly connected with a connecting rod. The connecting rod is rotationally connected with the movable frame, a first triangular block is fixedly connected to the outer side of the connecting rod, an outer limiting ring is fixedly connected to the left side of the movable frame, and an inner limiting ring is fixedly connected to the left side of the movable frame; when the friction roller is about to rotate due to friction resistance, the connecting rod is driven to rotate reversely through mechanical linkage, the first triangular block is driven to rotate reversely, the plane of the first triangular block makes contact with the plane of the second triangular block, the blocking effect of the second triangular block cannot be overcome through pushing, and the second triangular block cannot move towards the penetrating groove; the interaction limits the reverse rotation stroke of the first triangular block, the first triangular block is forced to stop rotating, and the function of preventing the friction roller from rotating is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of orientation film orientation technology, especially relates to liquid crystal display rubbing orientation device. BACKGROUND

[0002] The liquid crystal display is mainly composed of two product substrates, a transparent electrode for applying an electric field to the liquid crystal layer is arranged on the inner surface of the product substrate, a corresponding switching device is arranged for controlling the electric field, a color film is arranged on one of the product substrates for displaying colors, an alignment film layer is prepared on the inner surface of the product substrate for making the liquid crystal molecules orient along a specific direction, and the alignment film is rubbed along a certain direction after hardening.

[0003] The common liquid crystal display rubbing orientation device only includes the function of rubbing orientation, can rub the product substrate through the rubbing roller, but lacks the function of preventing the rubbing roller from rolling back, and the rubbing roller may reverse and rotate under the action of friction resistance between the contact interface when the rubbing roller rolls along the surface of the product substrate, which may interfere with the original directional arrangement of the liquid crystal molecules, and further cause the orientation direction of the liquid crystal molecules to deviate, and finally cause the problem of low production quality of the liquid crystal display.

[0004] Therefore, in view of the above problem that the rubbing roller lacks the function of preventing the rubbing roller from rolling back and the rubbing roller rolls on the product substrate, the rubbing roller may roll back under the action of friction between the contact, so that the arrangement direction of the liquid crystal molecules is disordered, and the product quality is affected, a liquid crystal display rubbing orientation device can be designed. UTILITY MODEL CONTENTS

[0005] In order to overcome the problem that the rubbing roller lacks the function of preventing the rubbing roller from rolling back and the rubbing roller rolls on the product substrate, the rubbing roller may roll back under the action of friction between the contact, so that the arrangement direction of the liquid crystal molecules is disordered, and the product quality is affected.

[0006] The utility model discloses a technical scheme for a liquid crystal display rubbing alignment device, which comprises a supporting bottom plate, a first triangular block and a second triangular block. An activity frame is arranged on the top of the supporting bottom plate. A friction roller is rotatably connected to the inner side of the activity frame. A connecting rod is fixedly connected to the left side of the friction roller. The connecting rod is rotatably connected to the activity frame. The first triangular block is fixedly connected to the outer side of the connecting rod. An outer limiting ring is fixedly connected to the left side of the activity frame. An inner limiting ring is fixedly connected to the left side of the activity frame. A plurality of through grooves are formed in the outer side of the inner limiting ring. A plurality of telescopic rods are fixedly connected to the inner side of the outer limiting ring. The second triangular block is fixedly connected to one end of the telescopic rod close to the inner limiting ring. The second triangular block is inserted into the through grooves. A plurality of springs are fixedly connected to the inner side of the outer limiting ring. One end of the springs away from the outer limiting ring is fixedly connected to the second triangular block. A translation mechanism is arranged on the supporting bottom plate. The translation mechanism is used to control the translation movement of the friction roller. A friction mechanism is arranged on the supporting bottom plate and the activity frame. The friction mechanism is used to control the lifting and rotating movement of the friction roller.

[0007] Preferably, when the friction roller is about to perform a reverse rotation movement due to the frictional resistance generated between the friction roller and the product substrate, the friction roller will drive the connecting rod to perform a reverse rotation movement through a mechanical linkage. At this time, the connecting rod will drive the first triangular block to perform a reverse rotation around the central axis of the friction roller. Since the planar structure of the first triangular block and the planar structure of the second triangular block are in contact, the pushing force exerted by the first triangular block during the rotation process cannot overcome the planar blocking effect of the second triangular block, resulting in that the second triangular block cannot be displaced into the internal space of the through grooves. This interaction causes the reverse rotation stroke of the first triangular block to be physically limited, thereby forcing the first triangular block to stop rotating around the central axis of the friction roller, effectively preventing the friction roller from rolling back, and finally achieving the locking function of the reverse rotation movement of the friction roller.

[0008] Preferably, the translation mechanism comprises a driving assembly and a driven assembly. The driving assembly is used to control the translation movement of the friction roller. The driven assembly is used to maintain the stability of the translation movement of the friction roller.

[0009] Preferably, the driving assembly comprises a plate placing frame, a main slide rail, a first motor, a lead screw and a main slide block. The plate placing frame is fixedly connected to the top of the supporting bottom plate. The main slide rail is fixedly connected to the top of the supporting bottom plate. The first motor is fixedly connected to the right side of the main slide rail. The output end of the first motor is fixedly connected to the lead screw. The first motor is used to drive the lead screw to rotate. One end of the lead screw away from the first motor is rotatably connected to the rear side inside the main slide rail. The main slide block is slidably connected to the inside of the main slide rail. The main slide block is threadedly connected to the lead screw.

[0010] Preferably, the driven assembly comprises a secondary slide rail, a secondary slide block and a slide rod. The secondary slide rail is fixedly connected to the top of the supporting bottom plate. The secondary slide block is slidably connected to the inside of the secondary slide rail. The slide rod is fixedly connected to the inside of the secondary slide rail. The secondary slide block is slidably connected to the slide rod.

[0011] As preferred, the friction mechanism comprises a lifting assembly for controlling the lifting movement of the friction roller and a rotating assembly for controlling the rotating movement of the friction roller.

[0012] As preferred, the lifting assembly comprises a translation frame and a cylinder; the top of the main sliding block and the top of the auxiliary sliding block are fixedly connected with the translation frame, the top of the translation frame is fixedly connected with the cylinder, and the output end of the cylinder is fixedly connected with the movable frame; the cylinder is used for controlling the lifting movement of the movable frame.

[0013] As preferred, the rotating assembly comprises a second motor; the right side of the movable frame is fixedly connected with the second motor, and the output end of the second motor is fixedly connected with the friction roller; the second motor is used for controlling the rotating movement of the friction roller.

[0014] The utility model discloses the beneficial effects of:

[0015] The structure is through mechanical linkage and plane contact limit cooperative action, has improved the reliability and response efficiency of friction roller locking significantly, utilizes the rigid contact of first triangular block reverse rotation and second triangular block plane structure to form physical stop when, effectively overcomes the response delay and wear failure problem existing in traditional elastic or friction braking mode, and through the through -going groove limit design ensures that the locking vector and friction resistance direction are strictly aligned, can accurate inhibition rotation inertia and can avoid over -positioning damage, and the overall structure realizes zero -energy consumption instantaneous locking with pure mechanical self -locking mechanism, has high stability, anti -interference and maintenance -free characteristics, thereby guaranteeing the precision in the friction orientation process of product substrate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic diagram of the utility model is shown;

[0017] Figure 2 The translation mechanism schematic diagram of the utility model is shown;

[0018] Figure 3 The friction mechanism schematic diagram of the utility model is shown;

[0019] Figure 4 The friction roller structure schematic diagram of the utility model is shown;

[0020] Figure 5 The anti -back -rolling assembly explosion schematic diagram of the utility model is shown.

[0021] Explanation of reference signs: 1, support bottom plate; 11, movable frame; 12, friction roller; 13, connecting rod; 14, first triangular block; 15, outer limiting ring; 16, inner limiting ring; 17, through groove; 18, telescopic rod; 19, second triangular block; 20, spring; 311, plate placing frame; 312, main slide rail; 313, first motor; 314, screw rod; 315, main slide block; 321, auxiliary slide rail; 322, auxiliary slide block; 323, slide rod; 411, translation frame; 412, air cylinder; 421, second motor. DETAILED DESCRIPTION

[0022] The utility model is further explained in connection with the drawings and examples.

[0023] Please refer to Figures 1-5 The utility model provides a kind of liquid crystal display rubbing alignment device, including support bottom plate 1, first triangular block 14 and second triangular block 19, the top of support bottom plate 1 is provided with movable frame 11, the inner side of movable frame 11 is rotatably connected with friction roller 12, the left side of friction roller 12 is fixedly connected with connecting rod 13, connecting rod 13 is rotatably connected with movable frame 11, the outer side of connecting rod 13 is fixedly connected with first triangular block 14, the left side of movable frame 11 is fixedly connected with outer limiting ring 15, the left side of movable frame 11 is fixedly connected with inner limiting ring 16, multiple through grooves 17 are arranged on the outer side of inner limiting ring 16, multiple telescopic rods 18 are fixedly connected on the inner side of outer limiting ring 15, one end of telescopic rod 18 close to inner limiting ring 16 is fixedly connected with second triangular block 19, second triangular block 19 is inserted into the inside of through groove 17, multiple springs 20 are fixedly connected on the inner side of outer limiting ring 15, one end of spring 20 away from outer limiting ring 15 is fixedly connected with second triangular block 19, translation mechanism is provided on support bottom plate 1, translation mechanism is used to control the translation motion of friction roller 12, friction mechanism is provided on support bottom plate 1 and movable frame 11, friction mechanism is used to control the lifting and rotary motion of friction roller 12, when friction roller 12 is about to rotate because of the friction resistance between friction roller 12 and product substrate, friction roller 12 then drives connecting rod 13 to do reverse rotary motion, and connecting rod 13 then drives first triangular block 14 to do reverse rotary motion around the axis of friction roller 12, at this time, the plane of first triangular block 14 is in contact with the plane of second triangular block 19, so that the pushing force exerted by first triangular block 14 in the process of rotation cannot overcome the plane blocking effect of second triangular block 19, and first triangular block 14 is blocked by second triangular block 19, which makes first triangular block 14 not continue to do reverse rotary motion around the axis of friction roller 12, so that friction roller 12 does not rotate, and the function of preventing friction roller 12 from rolling back is realized.

[0024] Please refer to Figures 2-5In the embodiment, the translation mechanism includes a driving assembly for controlling the translation movement of the friction roller 12 and a driven assembly for maintaining the smoothness of the translation of the friction roller 12. The driving assembly and the driven assembly combine to form a complete translation mechanism, and they control the translation movement of the friction roller 12 in cooperation with each other. The driving assembly includes a plate placing frame 311, a main slide rail 312, a first motor 313, a lead screw 314, and a main slide block 315. The top of the supporting bottom plate 1 is fixedly connected with the plate placing frame 311. The top of the supporting bottom plate 1 is fixedly connected with the main slide rail 312. The right side of the main slide rail 312 is fixedly connected with the first motor 313. The output end of the first motor 313 is fixedly connected with the lead screw 314. The first motor 313 is used to drive the rotation of the lead screw 314. The end of the lead screw 314 away from the first motor 313 is rotatably connected with the rear side inside the main slide rail 312. The inside of the main slide rail 312 is slidably connected with the main slide block 315. The main slide block 315 is threadedly connected with the lead screw 314. The rotation movement of the lead screw 314 is driven by the first motor 313. The lead screw 314 transmits power to the translation frame 411 through the main slide block 315 to make it displace. The translation frame 411 transmits the displacement movement to the friction roller 12, so that the friction roller 12 can perform a transverse translation scraping operation along the surface of the product substrate. The driven assembly includes a secondary slide rail 321, a secondary slide block 322, and a slide rod 323. The top of the supporting bottom plate 1 is fixedly connected with the secondary slide rail 321. The inside of the secondary slide rail 321 is slidably connected with the secondary slide block 322. The inside of the secondary slide rail 321 is fixedly connected with the slide rod 323. The secondary slide block 322 is slidably connected with the slide rod 323. The translation frame 411 synchronously drives the secondary slide block 322 to slide along the central axis of the slide rod 323 inside the secondary slide rail 321 during displacement.

[0025] Please refer to Figures 1-5 In the embodiment, the friction mechanism includes a lifting assembly and a rotating assembly. The lifting assembly is used to control the lifting movement of the friction roller 12. The rotating assembly is used to control the rotating movement of the friction roller 12. The lifting assembly and the rotating assembly combine to form a complete friction mechanism, and they control the lifting and rotating movement of the friction roller 12 in cooperation with each other. The lifting assembly includes a translation frame 411 and a cylinder 412. The top of the main slide block 315 and the secondary slide block 322 is fixedly connected with the translation frame 411. The top of the translation frame 411 is fixedly connected with the cylinder 412. The output end of the cylinder 412 is fixedly connected with the movable frame 11. The cylinder 412 is used to control the lifting movement of the movable frame 11. The movable frame 11 is driven by the cylinder 412 to move downward. The movable frame 11 drives the friction roller 12 to move downward to a specified height. The rotating assembly includes a second motor 421. The right side of the movable frame 11 is fixedly connected with the second motor 421. The output end of the second motor 421 is fixedly connected with the friction roller 12. The second motor 421 is used to control the rotating movement of the friction roller 12. The friction roller 12 is driven by the second motor 421 to rotate. The friction roller 12 drives the connecting rod 13 to rotate.

[0026] In the process of working, first of all, the product substrate is placed in the plate frame 311, and then the second motor 421 drives the friction roller 12 to rotate, which in turn drives the connecting rod 13 to rotate, at this time the connecting rod 13 drives the first triangular block 14 to rotate in the positive direction around the axis of the friction roller 12, and in the process of rotating the first triangular block 14, the inclined surface thereof is in contact with the inclined surface of the second triangular block 19 and forms a fit, thereby pushing one of the second triangular blocks 19 corresponding to the inside of the outer limiting ring 15, at this time the pushing force exerted by the first triangular block 14 in the process of rotation overcomes the blocking effect of the inclined surface of the second triangular block 19, at the same time the telescopic rod 18 and the spring 20 bear the pressure action synchronously, the telescopic rod 18 shrinks accordingly, and the spring 20 is in a compressed state, until the second triangular block 19 inside the outer limiting ring 15 is completely pushed into the through slot 17, the first triangular block 14 then continues to move to the adjacent next second triangular block 19, at this time the second triangular block 19 that has been pushed into the through slot 17 is pushed out from the inside of the through slot 17 again under the action of the reset pushing force released by the spring 20, and returns to the original position, thereby ensuring that the positive rotation process of the friction roller 12 will not be hindered in any way, then the movable frame 11 is driven downward by the air cylinder 412, which in turn drives the friction roller 12 to move downward to the specified height, after the friction roller 12 reaches the height suitable for the product substrate, the lead screw 314 is driven to rotate by the first motor 313, the power is transmitted to the translation frame 411 by the main sliding block 315 to make it displace, the translation frame 411 in the process of displacement synchronously drives the secondary sliding block 322 to slide along the central axis of the slide rod 323 inside the secondary slide rail 321, at the same time the translation frame 411 transmits the displacement motion to the friction roller 12, so that the friction roller 12 can perform transverse translation scraping operation along the surface of the product substrate, when the friction roller 12 is about to rotate due to the frictional resistance between the friction roller 12 and the product substrate, the friction roller 12 will drive the connecting rod 13 to perform reverse rotation motion through mechanical linkage, at this time the connecting rod 13 will drive the first triangular block 14 to rotate in the reverse direction around the central axis of the friction roller 12, because the planar structure of the first triangular block 14 is in contact with the planar structure of the second triangular block 19, therefore the pushing force exerted by the first triangular block 14 in the process of rotation cannot overcome the planar blocking effect of the second triangular block 19, resulting in that the second triangular block 19 cannot displace to the inside space of the through slot 17, this interaction makes the reverse rotation stroke of the first triangular block 14 physically limited, thereby forcing the first triangular block 14 to stop rotating in the reverse direction around the central axis of the friction roller 12, effectively preventing the friction roller 12 from rolling back.

[0027] Through the above steps, when the friction roller 12 is about to rotate due to friction resistance, the connecting rod 13 is reversely rotated through mechanical linkage driving, and the first triangular block 14 is reversely rotated, at this time, the first triangular block 14 is in plane contact with the second triangular block 19, and the pushing pressure cannot overcome the blocking effect of the second triangular block 19, so that the second triangular block 19 cannot be displaced to the through slot 17, the reverse rotation stroke of the first triangular block 14 is limited through the interaction, and the reverse rotation is forced to stop, the rotation locking function is realized, and the common liquid crystal display friction alignment device only contains the function of friction alignment, can perform friction treatment on the product substrate through the friction roller 12, but lacks the function of preventing the friction roller 12 from rolling back, and the friction roller 12 is easy to roll back due to the friction force between the friction roller 12 and the product substrate, so that the arrangement direction of the liquid crystal molecules is disordered, and the problem of low product quality is caused.

Claims

1. A rubbing alignment device for liquid crystal display comprising a supporting base plate (1); characterized in that: Also include the first triangular block (14) and the second triangular block (19), the upper support base plate (1) is provided with movable frame (11), the inner side of movable frame (11) is rotatably connected with friction roller (12), the left side of friction roller (12) is fixedly connected with connecting rod (13), connecting rod (13) is rotatably connected with movable frame (11), the outer side of connecting rod (13) is fixedly connected with the first triangular block (14), the left side of movable frame (11) is fixedly connected with outer limiting ring (15), the left side of movable frame (11) is fixedly connected with inner limiting ring (16), a plurality of through grooves (17) are formed in the outer side of inner limiting ring (16), a plurality of telescopic rods (18) are fixedly connected with the inner side of outer limiting ring (15), one end of telescopic rod (18) close to inner limiting ring (16) is fixedly connected with the second triangular block (19), the second triangular block (19) is inserted into the inside of through groove (17), a plurality of springs (20) are fixedly connected with the inner side of outer limiting ring (15), one end of spring (20) away from outer limiting ring (15) is fixedly connected with the second triangular block (19), the support base plate (1) is provided with a translation mechanism, the translation mechanism is used for controlling the translation movement of the friction roller (12), the support base plate (1) and movable frame (11) are provided with a friction mechanism, the friction mechanism is used for controlling the lifting and rotating movement of the friction roller (12).

2. The liquid crystal display rubbing alignment apparatus according to claim 1, wherein: The translation mechanism comprises a driving assembly and a driven assembly, the driving assembly is used for controlling the translation movement of the friction roller (12), and the driven assembly is used for keeping the stability of the translation of the friction roller (12).

3. The liquid crystal display rubbing alignment apparatus according to claim 2, wherein: The driving assembly comprises a plate placing frame (311), a main sliding rail (312), a first motor (313), a lead screw (314) and a main sliding block (315); the top of the support base plate (1) is fixedly connected with the plate placing frame (311), the top of the support base plate (1) is fixedly connected with the main sliding rail (312), the right side of the main sliding rail (312) is fixedly connected with the first motor (313), the output end of the first motor (313) is fixedly connected with the lead screw (314), the first motor (313) is used for driving the rotation of the lead screw (314), one end of the lead screw (314) away from the first motor (313) is rotatably connected with the rear side in the main sliding rail (312), the main sliding block (315) is slidably connected in the main sliding rail (312), and the main sliding block (315) is threadedly connected with the lead screw (314).

4. The liquid crystal display rubbing alignment apparatus according to claim 3, wherein: The driven assembly comprises a secondary sliding rail (321), a secondary sliding block (322) and a sliding rod (323); the top of the support base plate (1) is fixedly connected with the secondary sliding rail (321), the secondary sliding block (322) is slidably connected in the secondary sliding rail (321), and the sliding rod (323) is fixedly connected in the secondary sliding rail (321); the secondary sliding block (322) is slidably connected with the sliding rod (323).

5. The liquid crystal display rubbing alignment apparatus according to claim 4, wherein: The friction mechanism comprises a lifting assembly and a rotating assembly, the lifting assembly is used for controlling the lifting movement of the friction roller (12), and the rotating assembly is used for controlling the rotating movement of the friction roller (12).

6. The liquid crystal display rubbing alignment apparatus according to claim 5, wherein: The lifting assembly comprises a translation frame (411) and a pneumatic cylinder (412); the top of the main sliding block (315) and the vice sliding block (322) is fixedly connected with the translation frame (411), the top of the translation frame (411) is fixedly connected with the pneumatic cylinder (412), the output end of the pneumatic cylinder (412) is fixedly connected with the movable frame (11), and the pneumatic cylinder (412) is used for controlling the lifting movement of the movable frame (11).

7. The liquid crystal display rubbing alignment apparatus according to claim 6, wherein: The rotating assembly comprises a second motor (421); the right side of the movable frame (11) is fixedly connected with the second motor (421), the output end of the second motor (421) is fixedly connected with the friction roller (12), and the second motor (421) is used for controlling the rotating movement of the friction roller (12).

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