A polarizing sheet film for the release film unwinding device

Abstract

The application discloses a type of release film unwinding device for polarizing plate film, and relates to the technical field of polarizing plate production, which comprises a type of release film unwinding device for polarizing plate film, including an unwinding roller and an unwinding assembly, the unwinding roller is provided with a connecting key; the unwinding assembly comprises a rotating seat, a square tube and a driving shaft, one end of the rotating seat is provided with a slot, the connecting key is slidably connected to the inner wall of the slot, the other end of the rotating seat is provided with a first accommodating cavity, the inner wall of the first accommodating cavity is slidably connected to the square tube, and the inner wall of the square tube is connected to the driving shaft. When the motor is turned off, the driving shaft stops rotating, and the position of the driving shaft is locked by the motor. At this time, under the action of tension in the tight state of the release film, the square tube will continue to rotate, and a part of the release film will continue to be released. The tension of the release film is released, so that the release film that has been unwound is no longer in a tight state, avoiding the release film being elongated and losing elasticity, which affects the quality of the polarizing plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polarizing film production, and particularly relates to a release film unwinding device for polarizing film film pasting. BACKGROUND

[0002] The full name of the polarizing film is polarized light film, and the imaging of the liquid crystal display must rely on polarized light. All liquid crystals have two polarizing films tightly attached to the liquid crystal glass, forming a liquid crystal sheet with a total thickness of about 1mm. If any one polarizing film is missing, the liquid crystal sheet cannot display images. The basic structure of the polarizing film includes: PVA (polyvinyl alcohol) in the middle, two layers of TAC (triacetyl cellulose), PSA film (pressure sensitive adhesive), release film (release film) and protective film (protective film).

[0003] At present, the protective film and the release film are pasted on the polarizing film by the extrusion force of the passive roller (also called the upper composite roller) on the polarizing film. A polarizing film film pasting device is disclosed in Chinese Patent Publication No. CN114114513A, which comprises: a driving roller; a passive roller, which is arranged adjacent to the driving roller and has a pasting space between the two for the polarizing film and the functional film layer to pass through; and can avoid the occurrence of warping or bubbles and other adverse phenomena in batches of polarizing films due to uneven extrusion force of the passive roller on the polarizing film. However, in the existing device, in order to ensure close pasting with the polarizing film, the release film needs to be maintained in a tight state during unwinding. Due to mechanical failure or device debugging, the release film will stop unwinding, and at the same time, the motor position is locked, the position of the roller releasing the release film is fixed, and the release film that has been unwound will still maintain a tight state, which will cause the release film to be elongated and lose elasticity, affecting the quality of the polarizing film. SUMMARY

[0004] The technical problem to be solved by the present application is that in the existing device, in order to ensure close pasting with the polarizing film, the release film needs to be maintained in a tight state during unwinding. Due to mechanical failure or device debugging, the release film will stop unwinding, and at the same time, the motor position is locked, the position of the roller releasing the release film is fixed, and the release film that has been unwound will still maintain a tight state, which will cause the release film to be elongated and lose elasticity, affecting the quality of the polarizing film.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a polarizer film adhesive film release film unwinding device, comprising an unwinding roller and an unwinding assembly, the unwinding roller is provided with a connecting key; the unwinding assembly comprises a rotating seat, a square tube and a driving shaft, one end of the rotating seat is provided with a slot, the connecting key is slidably connected to the inner wall of the slot, the other end of the rotating seat is provided with a first accommodating cavity, the inner wall of the first accommodating cavity is slidably connected to the square tube, the inner wall of the square tube is connected to the driving shaft, and the inner wall of the square tube is provided with a guide groove, the driving shaft is provided with a limiting shaft corresponding to the guide groove, and the limiting shaft is slidably connected to the inner wall of the guide groove.

[0006] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the inner wall of the first accommodating cavity is fixedly connected to one end of the first spring, and the other end of the first spring is fixedly connected to the square tube.

[0007] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the unwinding assembly further comprises an outer tube and a support plate, the inner wall of the outer tube is rotatably connected to the rotating seat, and the outer wall of the outer tube is fixedly connected to the support plate.

[0008] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the unwinding assembly further comprises a fixing member, the fixing member comprises a clamping block, a second spring and a first telescopic rod, the rotating seat is provided with a second accommodating cavity, one end of the first telescopic rod is fixedly connected to the inner wall of the second accommodating cavity, the other end of the first telescopic rod is fixedly connected to the clamping block, the clamping block is slidably connected to the opening in the second accommodating cavity, and the inner wall of the outer tube is provided with an internal gear corresponding to the clamping block.

[0009] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the unwinding assembly further comprises a first control member, the first control member comprises a guide pipe, a second telescopic rod, a sliding block and a triangular block, one end of the guide pipe is communicated with the first accommodating cavity, the other end of the guide pipe is communicated with the second telescopic rod, one end of the second telescopic rod is fixedly connected to the inner wall of the second accommodating cavity, the other end of the second telescopic rod is fixedly connected to one side of the sliding block, the other side of the sliding block is fixedly connected to the triangular block, the clamping block is provided with a triangular groove corresponding to the triangular block, and the triangular block is slidably connected to the inner wall of the triangular groove.

[0010] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the unwinding assembly further comprises a second control member, the second control member comprises a connecting rod, a movable plate and a limiting block, one end of the connecting rod is fixedly connected to the sliding block, the other end of the connecting rod is fixedly connected to the movable plate, the movable plate is fixedly connected to the limiting block, the clamping block is provided with a limiting groove corresponding to the limiting block, and the limiting block is slidably connected to the inner wall of the limiting groove.

[0011] As a preferred scheme of the polarizer film adhesive film release film unwinding device, the inner wall of the first accommodating cavity is fixedly connected to a sealing ring, and the inner wall of the sealing ring is slidably connected to the square tube.

[0012] As a preferred scheme of the releasing film unwinding device for polarizing plate film, wherein: the outer wall of the outer tube is provided with an annular groove, the outer wall of the rotating seat is fixedly connected with a limiting ring corresponding to the annular groove, and the inner wall of the annular groove is rotatably connected with the limiting ring.

[0013] As a preferred scheme of the releasing film unwinding device for polarizing plate film, wherein: the driving shaft is provided with an accommodating hole, one end of a third spring is fixedly connected to the inner wall of the accommodating hole, and the other end of the third spring is fixedly connected with a limiting shaft which is slidably connected to the inner wall of the accommodating hole.

[0014] As a preferred scheme of the releasing film unwinding device for polarizing plate film, wherein: the unwinding roller is provided with a mounting hole, one end of a fourth spring is fixedly connected to the inner wall of the mounting hole, and the other end of the fourth spring is fixedly connected with a connecting key which is slidably connected to the inner wall of the mounting hole.

[0015] The beneficial effects of the present application are as follows: when the motor is closed, the driving shaft stops rotating, and the position of the driving shaft is locked by the motor. At this time, under the action of the tension in the tight state of the releasing film, the square tube will continue to rotate, and a part of the releasing film will be released. The tension of the releasing film is released, so that the releasing film that has been unwound is not in a tight state, avoiding the elongation of the releasing film and the loss of elasticity, which affects the quality of the polarizing plate. Moreover, no additional control operation is required for the unwinding roller. The improved working process is the same as the previous working process. Only the rotation or stop of the driving shaft can release the tension of the releasing film, which is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present disclosure.

[0017] Figure 2 It is a sectional view of the rotating seat in the embodiment of the present disclosure.

[0018] Figure 3 It is a sectional view of the rotating seat in the embodiment of the present disclosure. Figure 2 It is an enlarged schematic view of A in the embodiment of the present disclosure.

[0019] Figure 4 It is a sectional view of the outer tube in the embodiment of the present disclosure.

[0020] Figure 5 It is a sectional view of the driving shaft in the embodiment of the present disclosure.

[0021] Figure 6 It is a sectional view of the unwinding roller in the embodiment of the present disclosure.

[0022] : unwinding roller 1, connecting key 11; mounting hole 12, fourth spring 13, unwinding assembly 2, rotating seat 21, slot 211, air inlet pipe 2111, first accommodating cavity 212, first spring 213, second accommodating cavity 214, limiting ring 215, opening 2141, square tube 22, guide groove 221, drive shaft 23, limiting shaft 231, accommodating hole 232, third spring 233, outer tube 24, internal gear 241, annular groove 242, support plate 25, fixing piece 26, clamping block 261, triangular groove 2611, second spring 262, first telescopic rod 263, first control piece 27, guide pipe 271, second telescopic rod 272, sliding block 273, triangular block 274, second control piece 28, connecting rod 281, movable plate 282, limiting block 283, sealing ring 29. DETAILED DESCRIPTION

[0023] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0024] Embodiment 1

[0025] Reference Figure 1 and Figure 2 The embodiment provides a release film unwinding device for polarizing plate film, a release film unwinding device for polarizing plate film, which comprises an unwinding roller 1 and an unwinding assembly 2, and the unwinding roller 1 is provided with a connecting key 11.

[0026] In the embodiment, the unwinding roller 1 is wound with a release film, and the connecting key 11 can drive the unwinding roller 1 to rotate when the connecting key 11 rotates, so that the release film is unwound.

[0027] The unwinding assembly 2 comprises a rotating seat 21, a square tube 22 and a drive shaft 23, one end of the rotating seat 21 is provided with a slot 211, the connecting key 11 is slidably connected to the inner wall of the slot 211, the other end of the rotating seat 21 is provided with a first accommodating cavity 212, the inner wall of the first accommodating cavity 212 is slidably connected to the square tube 22, the inner wall of the square tube 22 is connected to the drive shaft 23, and the inner wall of the square tube 22 is provided with a guide groove 221, the drive shaft 23 is provided with a limiting shaft 231 corresponding to the guide groove 221, and the limiting shaft 231 is slidably connected to the inner wall of the guide groove 221.

[0028] In the embodiment, the connecting key 11 can be inserted into the slot 211, the cross section of the connecting key 11 is preferably square, and the slot 211 is provided corresponding to the connecting key 11, so as to facilitate the rotating seat 21 to drive the connecting key 11 to rotate when the rotating seat 21 rotates. When the drive shaft 23 is driven to rotate by a motor, a belt or a chain, the drive shaft 23 drives the limiting shaft 231 to rotate, the limiting shaft 231 drives the square tube 22 to move in the guide groove 221 through the square tube 22, and the square tube 22 drives the connecting key 11 to rotate through the slot 211. Figure 2The left side moves, compressing the air inside the first receiving cavity 212. The square tube 22 drives the rotating seat 21 to rotate, the rotating seat 21 drives the connecting key 11 to rotate, drives the unwinding roller 1 to rotate, and drives the release film to unwind.

[0029] When the motor is turned off, the drive shaft 23 stops rotating, and its position is locked by the motor. At this time, under the tension of the release film in its taut state, the square tube 22 continues to rotate, further releasing some of the release film and its tension. This prevents the released film from being stretched and losing its elasticity, which would affect the quality of the polarizer. Furthermore, no additional control operation is required on the unwinding roller 1. The improved workflow is the same as the previous one; simply controlling the rotation or stopping of the drive shaft 23 releases the tension of the release film, making it convenient to use. Previously, the drive shaft 23 rotated while the square tube 22 did not, causing the square tube 22 to... Figure 2 The square tube 22 moves to the left while the drive shaft 23 remains stationary. Since the drive shaft 23 and the square tube 22 rotate in the same direction, the square tube 22 will move towards... Figure 2 The right side moves, and the limiting shaft 231 moves to the guide groove 221. Figure 2 When the left side is in the middle, the square tube 22 stops rotating, and at this time the rotating seat 21 and the unwinding roller 1 also stop rotating, completely stopping the unwinding of the release film.

[0030] Example 2

[0031] Reference Figures 1 to 6 This embodiment is based on the previous embodiment, but differs from the previous embodiment in that...

[0032] One end of the first spring 213 is fixedly connected to the inner wall of the first receiving cavity 212, and the other end of the first spring 213 is fixedly connected to the square tube 22.

[0033] In this preferred embodiment, when the drive shaft 23 is rotated by the motor, the drive shaft 23 drives the limiting shaft 231 to rotate, and the limiting shaft 231 drives the square tube 22 to rotate via the guide groove 221. Figure 2 The leftward movement of the drive shaft 23 compresses the air inside the first receiving cavity 212 and the first spring 213. When the motor is turned off and the drive shaft 23 stops rotating, the air inside the first receiving cavity 212 and the first spring 213 apply a force to the square tube 22. Figure 2 The force that moves the right side of the tube facilitates the movement of the square tube 22.

[0034] Reference Figure 1 The unwinding assembly 2 also includes an outer tube 24 and a support plate 25. The rotating seat 21 is rotatably connected to the inner wall of the outer tube 24, and the outer wall of the outer tube 24 is fixedly connected to the support plate 25.

[0035] In the embodiment, the support plate 25 can fix the outer tube 24 to prevent the outer tube 24 from rotating, and the outer tube 24 can improve the stability of the rotating seat 21 during rotation.

[0036] With reference to Figure 2 and Figure 3 , the unwinding assembly 2 further comprises a fixing member 26, the fixing member 26 comprises a clamping block 261, a second spring 262 and a first telescopic rod 263, the rotating seat 21 is provided with a second accommodating cavity 214, the first telescopic rod 263 is fixedly connected to one end of the inner wall of the second accommodating cavity 214, the other end of the first telescopic rod 263 is fixedly connected to the clamping block 261, the clamping block 261 is slidingly connected to an opening 2141 in the second accommodating cavity 214, and the inner wall of the outer tube 24 is provided with an internal gear 241 corresponding to the clamping block 261.

[0037] In the embodiment, the clamping block 261 can slide in the opening 2141, and under the elastic force of the second spring 262, the clamping block 261 is pushed to move away from the axis of the rotating seat 21, the end of the clamping block 261 is inserted into the internal gear 241, at this time, the rotating seat 21 cannot rotate, the position of the rotating seat 21 is locked, at this time, the unwinding roller 1 cannot rotate, and the above release film cannot be scattered. The first telescopic rod 263 can limit the second spring 262.

[0038] With reference to Figure 2 and Figure 3 , the unwinding assembly 2 further comprises a first control member 27, the first control member 27 comprises a guide pipe 271, a second telescopic rod 272, a sliding block 273 and a triangular block 274, one end of the guide pipe 271 is communicated with the first accommodating cavity 212, the other end of the guide pipe 271 is communicated with the second telescopic rod 272, one end of the second telescopic rod 272 is fixedly connected to the inner wall of the second accommodating cavity 214, the other end of the second telescopic rod 272 is fixedly connected to one side of the sliding block 273, the other side of the sliding block 273 is fixedly connected to the triangular block 274, the clamping block 261 is provided with a triangular groove 2611 corresponding to the triangular block 274, and the triangular block 274 is slidingly connected to the inner wall of the triangular groove 2611.

[0039] In the embodiment, when the motor drives the driving shaft 23 to rotate, the driving shaft 23 drives the limiting shaft 231 to rotate, the limiting shaft 231 drives the square tube 22 to move to the left in the guide slot 221 through the guide slot 221, Figure 2 the air in the first accommodating cavity 212 enters the second telescopic rod 272 through the guide pipe 271, the second telescopic rod 272 is elongated, the second telescopic rod 272 pushes the sliding block 273 and the triangular block 274 to move to the right, Figure 3The middle right side moves, the triangular block 274 is inserted into the inner wall of the triangular groove 2611, under the action of the inclined surface, the push block 261 is driven to move to the direction close to the shaft center of the rotating seat 21, the end of the block 261 is separated from the internal gear 241, at this time the rotating seat 21 is unlocked and can rotate.

[0040] Referring to Figure 2 And Figure 3 , the second control member 28 further comprises a connecting rod 281, a movable plate 282 and a limiting block 283, one end of the connecting rod 281 is fixedly connected with the sliding block 273, the other end of the connecting rod 281 is fixedly connected with the movable plate 282, the movable plate 282 is fixedly connected with the limiting block 283, the limiting groove is arranged on the block 261 corresponding to the limiting block 283, and the limiting block 283 is slidably connected with the inner wall of the limiting groove. The connecting rod 281 is preferably provided with two, which are located on the two sides of the second spring 262 and the first telescopic rod 263 respectively.

[0041] In the preferred embodiment, when the motor is turned off, the driving shaft 23 stops rotating, and the position of the driving shaft 23 is locked by the motor, at this time, under the action of the tension in the state that the release film is tight, the square tube 22 continues to rotate, when the motor is turned off, the driving shaft 23 stops rotating, the air in the first accommodating cavity 212 and the first spring 213 will exert a force to the square tube 22 in the direction of Figure 2 , the square tube 22 moves to the right while rotating, and at this time the air pressure in the first accommodating cavity 212 decreases, the air in the second telescopic rod 272 passes through the conduit 271 and the first accommodating cavity 212, the second telescopic rod 272 contracts, and the sliding block 273 moves to Figure 3 the left side, the sliding block 273 drives the triangular block 274 to separate from the triangular groove 2611, and at the same time the sliding block 273 drives the connecting rod 281, the movable plate 282 and the limiting block 283 to move to the left side, the limiting block 283 is inserted into the inner wall of the limiting groove, the position of the block 261 is locked, the block 261 is prevented from sliding in the inner wall of the opening 2141, double locking is achieved, the position of the rotating seat 21 is locked, and the rotating seat 21 is prevented from rotating. When assembling, the rotating seat 21 can be cut open along the Figure 2 sectional plane, after the assembly of the internal parts of the rotating seat 21 is completed, the rotating seat 21 is welded together.

[0042] Referring to Figure 2 , the inner wall of the first accommodating cavity 212 is fixedly connected with the sealing ring 29, and the inner wall of the sealing ring 29 is slidably connected with the square tube 22.

[0043] In the preferred embodiment, the sealing ring 29 is beneficial to improve the sealing performance of the first accommodating cavity 212.

[0044] Referring to Figure 4The outer tube 24 inner wall is provided with an annular groove 242, the rotating seat 21 outer wall is fixedly connected with a limiting ring 215 corresponding to the annular groove 242, and the annular groove 242 inner wall is rotatably connected with the limiting ring 215.

[0045] In the embodiment, the rotating seat 21 can drive the limiting ring 215 to rotate in the annular groove 242 inner wall. Through the arrangement of the annular groove 242 and the limiting ring 215, the axial movement of the rotating seat 21 can be prevented. During assembly, the outer tube 24 can be welded together after the outer tube 24 is cut open in part, and the rotating seat 21 and the related parts are put into the outer tube 24. Figure 4

[0046] Referring to Figure 5 The driving shaft 23 is provided with a containing hole 232, the containing hole 232 inner wall is fixedly connected with one end of a third spring 233, the other end of the third spring 233 is fixedly connected with a limiting shaft 231, and the limiting shaft 231 is slidably connected with the containing hole 232 inner wall.

[0047] In the embodiment, the limiting shaft 231 can slide in the containing hole 232 inner wall. During assembly, the limiting shaft 231 is pressed, and the third spring 233 is compressed. The driving shaft 23 is inserted into the square tube 22. When the limiting shaft 231 moves to the position of the guide groove 221, the third spring 233 pops a part of the limiting shaft 231 into the guide groove 221, and the assembly is completed.

[0048] Referring to Figure 6 The unwinding roller 1 is provided with a mounting hole 12, the mounting hole 12 inner wall is fixedly connected with one end of a fourth spring 13, the other end of the fourth spring 13 is fixedly connected with a connecting key 11, and the connecting key 11 is slidably connected with the mounting hole 12 inner wall.

[0049] In the embodiment, the connecting key 11 can slide in the mounting hole 12 inner wall. When the unwinding roller 1 is replaced, air can be pumped into the position of the air inlet pipe 2111 to push the connecting key 11 to the disengaged position of the insertion slot 211. At this time, the unwinding roller 1 can be replaced. Then, the connecting key 11 on the new unwinding roller 1 is aligned with the insertion slot 211. The fourth spring 13 pops a part of the connecting key 11 into the insertion slot 211, and the replacement of the unwinding roller 1 is completed.

[0050] During use, when the driving shaft 23 is driven to rotate by the motor, the release film is slowly released. The front of the release film can be provided with a traction roller. The release film passes through the gap between the two traction rollers. The traction roller is driven to rotate to pull the release film to move. The driving shaft 23 drives the limiting shaft 231 to rotate. The limiting shaft 231 drives the square tube 22 to move to the left through the guide groove 221. Figure 2 ​the left, compresses the air inside the first accommodating cavity 212 and the first spring 213, and the air inside the first accommodating cavity 212 enters the second telescopic rod 272 through the conduit 271, the second telescopic rod 272 is elongated, the second telescopic rod 272 pushes the sliding block 273 and the triangular block 274 to move to the right Figure 3 the right, the triangular block 274 is inserted into the inner wall of the triangular groove 2611, under the action of the inclined surface, the triangular block 274 drives the push block 261 to move to the direction close to the axis of the rotating seat 21, the end of the push block 261 is separated from the internal gear 241, at this time, the rotating seat 21 is unlocked and can rotate, the rotating seat 21 drives the connecting key 11 to rotate, drives the unwinding roller 1 to rotate, and drives the release film to be unwound.

[0051] When the motor is turned off, the driving shaft 23 stops rotating, and the position of the driving shaft 23 is locked by the motor, at this time, under the action of the tension in the tight state of the release film, the square tube 22 continues to rotate and releases a part of the release film, releases the tension of the release film, so that the release film that has been unwound is not in the tight state, avoids the release film being elongated and losing elasticity, and affects the quality of the polarizer, and the improved working process is the same as the previous working process, only needs to control the rotation or stop of the driving shaft 23, so that the tension of the release film is released, is convenient to use, the air inside the first accommodating cavity 212 and the first spring 213 will exert a force to the square tube 22 in the direction of the left in the figure Figure 2 the right, the square tube 22 rotates while moving to the right, and at this time, the air pressure inside the first accommodating cavity 212 is reduced, the air inside the second telescopic rod 272 enters the first accommodating cavity 212 through the conduit 271, the second telescopic rod 272 is contracted, drives the sliding block 273 to move to the left Figure 3 the left, the square tube 22 does not move out of the first accommodating cavity 212 during the movement to the right.

[0052] the sliding block 273 drives the triangular block 274 to move away from the triangular groove 2611, under the action of the second spring 262, the push block 261 is pushed to move away from the axis of the rotating seat 21, the end of the push block 261 is inserted into the internal gear 241, at this time, the rotating seat 21 cannot rotate, the position of the rotating seat 21 is locked, at the same time, the sliding block 273 drives the connecting rod 281, the movable plate 282 and the limiting block 283 to move to the left, the limiting block 283 is inserted into the limiting groove, locks the position of the push block 261, prevents the push block 261 from sliding in the opening 2141, double-locks the position of the rotating seat 21, and prevents the rotating seat 21 from rotating.

Claims

1. A polarizing sheet film for a release film unwinding device, characterized by: Comprising The unwinding roller (1) is provided with a connecting key (11); The unwinding assembly (2) comprises a rotating seat (21), a square tube (22), a drive shaft (23), an outer tube (24), a support plate (25), a fixing piece (26), a first control piece (27), one end of the rotating seat (21) is provided with a slot (211), the connecting key (11) is connected in the inner wall of the slot (211), the other end of the rotating seat (21) is provided with a first accommodating cavity (212), the inner wall of the first accommodating cavity (212) is connected with the square tube (22) in a sliding manner, one end of the first spring (213) is fixedly connected with the inner wall of the first accommodating cavity (212), the other end of the first spring (213) is fixedly connected with the square tube (22), the inner wall of the square tube (22) is connected with the drive shaft (23), and the inner wall of the square tube (22) is provided with a guide groove (221), the drive shaft (23) is provided with a limiting shaft (231) corresponding to the guide groove (221), the limiting shaft (231) is connected with the inner wall of the guide groove (221) in a sliding manner, and the inner wall of the outer tube (24) is rotatably connected with the rotating seat (21); the outer wall of the outer tube (24) is fixedly connected with the support plate (25); The fixing piece (26) comprises a clamping block (261), a second spring (262) and a first telescopic rod (263), the rotating seat (21) is provided with a second accommodating cavity (214), one end of the first telescopic rod (263) is fixedly connected with the inner wall of the second accommodating cavity (214), the other end of the first telescopic rod (263) is fixedly connected with the clamping block (261), the clamping block (261) is connected with the opening (2141) on the second accommodating cavity (214) in a sliding manner, and the inner wall of the outer tube (24) is provided with an internal gear (241) corresponding to the clamping block (261); The first control piece (27) comprises a guide pipe (271), a second telescopic rod (272), a sliding block (273) and a triangular block (274), one end of the guide pipe (271) is connected with the first accommodating cavity (212), the other end of the guide pipe (271) is connected with the second telescopic rod (272), one end of the second telescopic rod (272) is fixedly connected with the inner wall of the second accommodating cavity (214), the other end of the second telescopic rod (272) is fixedly connected with one side of the sliding block (273), the other side of the sliding block (273) is fixedly connected with the triangular block (274), the clamping block (261) is provided with a triangular groove (2611) corresponding to the triangular block (274), and the triangular block (274) is connected with the inner wall of the triangular groove (2611) in a sliding manner.

2. The polarizing sheet sticker film release film unwinding device according to claim 1, characterized by: The unwinding assembly (2) further comprises a second control piece (28), the second control piece (28) comprises a connecting rod (281), a movable plate (282) and a limiting block (283), one end of the connecting rod (281) is fixedly connected with the sliding block (273), the other end of the connecting rod (281) is fixedly connected with the movable plate (282), the movable plate (282) is fixedly connected with the limiting block (283), the clamping block (261) is provided with a limiting groove corresponding to the limiting block (283), and the limiting block (283) is connected with the inner wall of the limiting groove in a sliding manner.

3. The polarizing sheet sticker film release film unwinding device according to claim 2, characterized by: The inner wall of the first accommodating cavity (212) is fixedly connected with a sealing ring (29), and the inner wall of the sealing ring (29) is slidably connected with a square tube (22).

4. The polarizing sheet sticker film release film unwinding device according to claim 1, characterized by: The outer wall of the rotating seat (21) is fixedly connected with a limiting ring (215) corresponding to the annular groove (242) on the inner wall of the outer tube (24), and the limiting ring (215) is rotatably connected with the inner wall of the annular groove (242).

5. The polarizing sheet sticker film release film unwinding device according to claim 1, characterized by: The driving shaft (23) is provided with an accommodating hole (232), one end of a third spring (233) is fixedly connected with the inner wall of the accommodating hole (232), the other end of the third spring (233) is fixedly connected with a limiting shaft (231), and the limiting shaft (231) is slidably connected with the inner wall of the accommodating hole (232).

6. The polarizing sheet sticker film release film unwinding device according to claim 1, wherein: The unwinding roller (1) is provided with a mounting hole (12), one end of a fourth spring (13) is fixedly connected with the inner wall of the mounting hole (12), the other end of the fourth spring (13) is fixedly connected with a connecting key (11), and the connecting key (11) is slidably connected with the inner wall of the mounting hole (12).

Images