Pulley block tool for automobile interior black film

Abstract

The utility model discloses a pulley block tool for an automotive trim black film, and relates to the technical field of black film pasting. And the extrusion assembly is installed on the sliding piece, and when the sliding piece is connected with the automobile door frame, the extrusion assembly is attached to the automobile door frame. According to the pulley block tool for the automobile interior black film, the diameter of the driven gear is adjusted to be smaller than that of the linkage gear, the flexible column can conduct slicking operation on the black film while the pulley rolls along with the surface of an automobile door frame, and therefore the problem that when an existing black film pasting auxiliary tool is used, the tool cannot be used for pasting the black film easily is effectively solved. The technical problem that perfect attachment of the black film and the car door frame cannot be ensured is solved, then the attachment tightness of the black film and the car door frame is achieved, meanwhile, the black film does not need to be manually scraped again, black film adhesion is completed at a time, and the work efficiency of black film adhesion is improved.

Description

Technical Field

[0001] This utility model relates to the field of black film pasting technology, and in particular to a pulley system tool for automotive interior black film. Background Technology

[0002] Black film adhesive strips for car door frames are decorative adhesive strips that are pasted on car door frames. They can replace paint and have a decorative effect. They are usually made of rubber materials and have good elasticity and durability.

[0003] When applying black adhesive strips to the edges of car door frames, the operating temperature should not be lower than 20℃, depending on the specific requirements. In low-temperature environments, preheating of the black adhesive strips is necessary. Currently, most car manufacturers still use the traditional method of manually positioning and applying the black adhesive strips to car door frames. This method demands a certain level of experience and skill from the workers. Because the edges of car door frames have a certain curvature, highly experienced workers with precise techniques are needed to complete the application accurately in one go.

[0004] Currently, a Chinese patent with the main patent application number "CN202410319086.8" discloses a tooling for applying black film adhesive strips to automotive door frames. The tooling includes a mounting base, with a bottom paper separation cover and a door clamping plate perpendicular to the base hinged to its two sides. One end of the mounting base is connected to a pressure roller, an adhesive strip guide roller, a guide roller, and a bottom paper separation rod perpendicular to the mounting base. One end of the pressure roller, adhesive strip guide roller, and guide roller is rotatably connected to the mounting base, and one end of the bottom paper separation rod is fixedly connected to the mounting base. The pressure roller is located between the guide roller and the adhesive strip guide roller, and the bottom paper separation rod is located between the guide roller and the pressure roller. The other end of the pressure roller and the adhesive strip guide roller is rotatably connected to a limiting plate perpendicular to the bottom paper separation cover. A positioning roller is rotatably connected to one side of the door clamping plate facing the limiting plate, and clamping rollers are provided on the connecting plate. While the patent can position and guide the application of the black film adhesive strip, it overlooks a crucial issue: the tightness of the adhesion between the black film and the car door frame. Traditional methods require squeezing the adhesive strip with a scraper to ensure a tight fit with the car door frame surface, which is time-consuming and labor-intensive.

[0005] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0006] The existing black film application tools cannot ensure a perfect fit between the film and the door frame: They primarily rely on sliding the tool along the door frame surface to adhere the film, neglecting the degree of adhesion between the film and the frame. Traditional tools achieve adhesion by pressing the film against the frame, but this method easily creates air bubbles and wrinkles (similar to applying screen protectors to mobile phones). To eliminate these issues, a scraper (or film scraping tool) is needed to smooth the film from one end to the other, which is time-consuming, laborious, and may damage the film (scratches). Furthermore, due to differences in vehicle models and door frame shapes, simply pressing the film cannot ensure a perfect fit. Therefore, we propose a roller assembly tool for automotive interior black film application. Utility Model Content

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this utility model provides a pulley system tool for applying black film to automotive interiors, solving the technical problem that existing black film application aids cannot ensure a perfect fit between the black film and the car door frame.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A pulley system tool for applying black film to automotive interior trim, the pulley system tool comprising:

[0012] A sliding component that can slide along the door frame;

[0013] An extrusion assembly is mounted on a slider, and when the slider is connected to the door frame, the extrusion assembly adheres to the side of the door frame to which the film is to be applied.

[0014] The sliding member is connected to a transmission assembly, which is connected to the extrusion assembly to provide power for the rotation of the extrusion assembly.

[0015] As the slider slides along the door frame, the transmission assembly drives the pressing assembly to rotate in the direction of extension of the door frame, and the distance the pressing assembly rotates is greater than the distance the slider moves.

[0016] Preferably, the sliding member includes an upper and lower corresponding support seat and a base plate, which are connected by a connecting rod, and the extrusion assembly is connected between the support seat and the base plate;

[0017] Among them, a limiting member is connected to the top of the bearing seat, and the sliding component is connected to the car door frame through the limiting member.

[0018] Preferably, the limiting member includes a pressing plate movably connected to the top of the bearing seat, and a hook plate is connected to the front end of the pressing plate. When the sliding seat is connected to the car door frame, the hook plate and the positioning plate on the bearing seat clamp the car door frame, and the pressing component is in contact with the surface of the car door frame.

[0019] Preferably, the bearing seat includes a top plate in a "C" shape, and two parallel extension heads are connected to the front end of the top plate; the pressing plate is connected between the two extension heads through a torsion spring;

[0020] Among them, the positioning plate is connected between the two extension heads and is located below the extension heads.

[0021] Preferably, the pressing component includes three groups of flexible columns with opposite ends, and adjacent two flexible columns are connected through a universal joint. One end of the flexible column is connected to the bottom plate through a universal joint, and the other end of the flexible column is connected to the transmission component through a universal joint.

[0022] Preferably, a positioning frame is connected between the bearing seat and the bottom plate, and the bottom plate fixes the pressing component through the positioning frame;

[0023] Among them, the positioning frame includes a central rod connected between the bearing seat and the bottom plate, and a bracket is sleeved on the central rod. An extension arm extending outward is connected to the outside of the bracket, and an arc-shaped opening is provided at the end of the extension arm, and the universal joint is clamped through the opening.

[0024] Preferably, the transmission component is installed inside the bearing seat, and the transmission component includes a roller and a driven gear that are interlocked. The roller is installed in the positioning plate. When the sliding seat is connected to the car door frame, the roller inside the positioning plate is in contact with the edge of the car door frame;

[0025] The driven gear is connected to the end of the flexible column through a universal joint. When the roller rotates, the torsion can be transmitted to the pressing component through the driven gear.

[0026] Preferably, an interlocking gear is embedded and installed inside the bearing seat, and two meshing transmission gears are connected between the interlocking gear and the driven gear. The interlocking gear and the driven gear are respectively meshed with one of the transmission gears;

[0027] Among them, the interlocking gear and the roller are connected through a connecting rod;

[0028] The outer diameter of the interlocking gear is larger than the outer diameter of the driven gear, and the two transmission gears have the same specifications.

[0029] (III) Beneficial effects

[0030] 1. Since a flexible column made of silica gel material is used as the part contacting the black film, it will not scratch the black film. At the same time, the flexibility of the flexible column can be utilized to closely fit with the surface of the car door frame, thus being applicable to car door frames of different shapes to improve the tightness of the subsequent fit between the black film and the car door frame. Secondly, it is composed of three flexible columns connected end to end, and is connected by a universal joint, which can form a "C" - shaped structure, so as to simultaneously extrude the center and the edge of the black film. Therefore, it effectively solves the technical problem that the existing auxiliary tool for pasting the black film cannot ensure a perfect fit between the black film and the car door frame, and further realizes uniformly bonding the black film on the surface of the car door frame. At the same time, it can also be applicable to the shapes of car door frames of different vehicles, thereby improving the applicability and stability of the device.

[0031] 2. Since a gear set is used to connect the flexible column and the roller on the positioning plate, it can transmit the torque generated during the movement of the sliding part to the flexible column, enabling the flexible column to slide - extrude the black film. In addition, by adjusting the diameter of the driven gear connected to the flexible column to be smaller than the diameter of the linkage gear connected to the pulley, it can make the flexible column perform a "smoothing" operation on the black film while the pulley rolls along the surface of the car door frame, thus improving the tightness of the fit between the black film and the car door frame. At the same time, there is no need for manual "smoothing" operation on the black film again, and thus the bonding of the black film is completed一次性 (should be "at one time") to improve the working efficiency of black film bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and be able to implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to elaborate as follows.

[0033] Figure 1 It is the overall structure diagram of the embodiment of the present invention;

[0034] Figure 2 It is the exploded structure diagram of the sliding part in the embodiment of the present invention;

[0035] Figure 3 It is for the embodiment of the present invention Figure 2 The exploded structure diagram of the lower half part in the embodiment;

[0036] Figure 4 It is the front and back structure diagrams of the carrier seat in the embodiment of the present invention;

[0037] Figure 5 It is the connection schematic diagram of the transmission component and the extrusion component in the embodiment of the present invention;

[0038] Figure 6 It is the structure schematic diagram of the transmission component in the embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the extrusion assembly in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the motion state of the extrusion assembly in an embodiment of this utility model;

[0041] Figure 9 This is one of the schematic diagrams showing the installation of the black film in an embodiment of this utility model;

[0042] Figure 10 This is the second schematic diagram of the installation of the black film in this embodiment of the present invention;

[0043] Figure 11 This is the third schematic diagram of the installation of the black film in this embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the pressing state of the pressure plate in an embodiment of this utility model.

[0045] Legend:

[0046] 1. Support base; 11. Top plate; 12. Extension head; 13. Pulley roller;

[0047] 2. Pressure plate; 21. Hook plate;

[0048] 3. Base plate;

[0049] 4. Connecting rod;

[0050] 5. Positioning plate;

[0051] 6. Extrusion assembly; 61. Flexible column; 62. Universal joint;

[0052] 7. Transmission components; 71. Roller; 72. Connecting gear; 73. Transmission gear; 74. Driven gear;

[0053] 8. Positioning frame; 81. Center rod; 82. Bracket; 83. Extension arm;

[0054] 91. Door frame; 92. Black film. Detailed Implementation

[0055] This application provides a pulley system tool for applying black interior window film to cars, solving the problem that existing black film application tools cannot ensure a perfect fit between the film and the door frame. In existing black film application tools, the use of flexible silicone pillars as the contact parts with the film not only avoids scratching the film but also allows for a tight fit to the door frame surface due to the pillars' flexibility. This makes it suitable for door frames of different shapes, improving the subsequent tightness of the fit between the black film and the door frame. Furthermore, the tool consists of three interconnected flexible pillars connected by a universal joint, forming a "U"-shaped structure that simultaneously compresses the center and edges of the black film, thus achieving a perfect fit. The black film is evenly adhered to the surface of the car door frame and is suitable for different vehicle door frame shapes, thereby improving the applicability and stability of the device. Because a gear set connects the flexible column to the rollers on the positioning plate, the torque generated during the movement of the sliding component is transmitted to the flexible column, causing the flexible column to slide and compress the black film. Furthermore, by adjusting the diameter of the driven gear connected to the flexible column to be smaller than the connecting gear connected to the pulley, the flexible column can "smooth" the black film while the pulley rolls along the car door frame surface, thus improving the tightness of the adhesion between the black film and the car door frame. This eliminates the need for manual "smoothing" of the black film again, completing the adhesion in one step and improving the efficiency of the black film adhesion process.

[0056] Example: The technical solution in this application example is to solve the problem that existing black film pasting aids cannot ensure a perfect fit between the black film and the car door frame during use. The overall idea is as follows:

[0057] To address the problems existing in the prior art, this utility model provides a pulley system tool for automotive interior black film. This pulley system tool mainly includes a sliding component for supporting all structures, a pressing component 6 for pressing the black film 92, and a transmission component 7 for providing power to the pressing component 6. The main design of this application is to utilize the power generated by the sliding component as it slides along the door frame 91, which is transmitted to the pressing component 6 via the transmission component 7. This causes the pressing component 6 to press the black film 92. Simultaneously, the power transmitted from the transmission component 7 can also be used to push the black film 92 in the extending direction, thereby forming a "scraper"-like structure to smooth the surface of the black film 92, allowing the black film 92 to adhere tightly to the door frame 91. The specific structure is as follows:

[0058] The sliding component primarily serves a load-bearing function (supporting the extrusion assembly 6 and the transmission assembly 7). The sliding component mainly comprises upper and lower corresponding support seats 1 and a base plate 3, which are connected by two connecting rods 4. Figure 2 and Figure 3As shown, a "frame" is formed, and the extrusion component 6 is connected between the bearing seat 1 and the bottom plate 3 and faces the position of the door frame 91 to be film-coated, so as to facilitate the extrusion component 6 to fit against the side of the door frame 91 to be film-coated when the sliding part is connected to the door frame 91, which is convenient for the subsequent extrusion of the extrusion component 6 on the black film 92. As Figure 11 shown, the sliding part can slide along the door frame 91, and the black film 92 is covered on the door frame 91 by sliding. As Figure 9 - Figure 11 shown, in order to be able to slide along the door frame 91, it is necessary to "lock" between the sliding part and the door frame 91 to facilitate the sliding of the sliding part along the door frame 91.

[0059] The "locking" structure mainly includes a pressing plate 2 movably connected to the top of the bearing seat 1, and a hook plate 21 is connected to the front end of the pressing plate 2. When the sliding seat is connected to the door frame 91, the hook plate 21 and the positioning plate 5 on the bearing seat 1 clamp the door frame 91, and the extrusion component 6 fits against the surface of the door frame 91. On the contrary, when unlocking is required, by pressing the pressing plate 2, the pressing plate 2 rotates around the rotating shaft between it and the extension head 12, thus forming as Figure 12 shown. At this time, the hook plate 21 connected to the end of the pressing plate 2翘起, thus releasing the grabbed door frame 91, and then the sliding part can be removed from the door frame 91, thereby realizing the taking and placing of the sliding part; Reset: The pressing plate 2 and the extension head 12 are connected by a torsion spring, and the torsion force of the torsion spring on the pressing plate 2 makes the hook plate 21 at its end move towards the direction of the positioning plate 5.

[0060] Among them, the bearing seat 1 includes a top plate 11 in a "C" shape, and two parallel extension heads 12 are connected to the front end of the top plate 11. The pressing plate 2 is connected between the two extension heads 12 by a torsion spring; and the positioning plate 5 is connected between the two extension heads 12 and is located below the extension heads 12, which is convenient for the pulley on the positioning plate 5 to fit against the surface of the door frame 91 after the device is connected to the door frame 91. In this way, when the sliding part slides along the door frame 91, the roller 71 on the positioning plate 5 can be driven to rotate, providing power for the subsequent extrusion component 6.

[0061] The extrusion component 6 (also called the lifting and fitting component) mainly includes a flexible column 61 made of silica gel material and a universal shaft 62 connected to the flexible column 61. The reason for using the flexible column 61 made of silica gel material is that silica gel has a certain flexibility and can deform when pressed, so as to fit tightly against the surface of the door frame 91, so that the black film 92 can be extruded and can be stably and tightly adhered to the door frame 91.

[0062] Due to the shape of the car door frame 91 being affected by the vehicle model and being complex and diverse, single-sided extrusion cannot stably and comprehensively extrude the black film 92. Therefore, we changed the original one flexible column 61 to three flexible columns 61 connected end to end and connected by a universal joint 62. Utilizing the mobility of the universal joint 62, the three flexible columns 61 can be bent into a "匚" shape and can also rotate synchronously, so as to extrude the black film 92 from three sides, enabling it to fully fit the surface of the car door frame 91. In addition, since three flexible columns 61 are used, the middle and edges of the black film 92 can be extruded simultaneously, thus extruding the black film 92 towards the direction where the car door frame 91 is located.

[0063] In order to prevent the flexible column 61 from shifting in position during use, a positioning frame 8 is provided between the two connecting rods 4 to limit the position of the flexible column 61 through the positioning frame 8. The specific structure is as follows:

[0064] The positioning frame 8 is installed between the bearing seat 1 and the bottom plate 3, and the bottom plate 3 fixes the extrusion assembly 6 through the positioning frame 8;

[0065] Among them, the positioning frame 8 includes a central rod 81 connected between the bearing seat 1 and the bottom plate 3, and a bracket 82 (in a ring shape) is sleeved on the central rod 81. Two outwardly extending extension arms 83 are connected to the outside of the bracket 82, and the two extension arms 83 are respectively connected to the flexible columns 61 on both sides. For the convenience of connection, an arc-shaped opening is provided at the end of the extension arm 83, as Figure 7 shown, and the universal joint 62 is clamped through the opening (the two can also be connected through a bearing). Therefore, by setting two groups of brackets 82, as Figure 3 shown, one flexible column 61 at the center of the three mutually connected flexible columns 61 can be fixed, as Figure 7 shown, and thus the three flexible columns 61 can be fixed. The two flexible columns 61 at the outermost ends are respectively connected to the bottom plate 3 and the transmission assembly 7 through the universal joint 62. Among them, the bottom plate 3 and the universal joint 62 are connected through a bearing, and the transmission assembly 7 (driven gear 74) is fixedly connected to the universal joint.

[0066] The transmission assembly 7 (a power transmission structure mainly composed of gears) mainly includes a roller 71 and a driven gear 74 that are interlocked. The roller 71 is installed in the positioning plate 5. When the sliding seat is connected to the car door frame 91, the roller 71 inside the positioning plate 5 fits the edge of the car door frame 91, and the outer diameter of the roller 71 is the same as the outer diameter of the flexible column 61;

[0067] The driven gear 74 is connected to the end of the flexible column 61 through the universal joint 62, so when the roller 71 rotates, the torque can be transmitted to the extrusion assembly 6 through the driven gear 74.

[0068] To make the extrusion component 6 move towards the "scraper", the principle is explained as follows: the scraper moves relative to the black film 92, and during the movement, the scraper squeezes the black film 92, pushing the air in the black film 92 forward, thereby achieving the effect of smoothing. To accomplish this process, relative movement between the flexible column 61, which is attached to the black film 92, and the black film 92 is required. For this purpose, we use the transmission ratio between gears of different diameters. The connecting gear 72 is connected to the roller 71, and the driven gear 74 is connected to the flexible column 61. The outer diameter of the connecting gear 72 is larger than that of the driven gear 74. Since the outer diameter of the roller 71 is the same as that of the flexible column 61, when the connecting gear 72 drives the driven gear 74 to rotate, the flexible column 61 connected to the driven gear 74 needs to rotate more than one revolution for the connecting gear 72 to rotate one revolution. This allows the flexible column 61 to move relative to the black film 92 (forming a "scraper"). At the same time, since the flexible column 61 is made of flexible material (silicone), it will not damage the black film 92 during relative movement.

[0069] Since the roller 71 is installed in the positioning plate 5 at a distance from the bearing seat 1, two pairs of meshing transmission gears 73 are connected between the driving gear 72 and the driven gear 74. The driving gear 72 and the driven gear 74 are respectively meshed with one of the transmission gears 73. Moreover, the two transmission gears 73 are of the same specification, so that the torque when the driving gear 72 rotates can be transmitted to the driven gear 74, and the problem of the distance between the positioning plate 5 and the bearing seat 1 can also be solved.

[0070] In the specific implementation process, press the sliding part towards the direction of the door frame 91, such as... Figure 9 As shown, because the front end of the hook plate 21 is inclined, it can be squeezed when it is attached to the door frame 91, causing the hook plate 21 to rotate and expose the gap between the hook plate 21 and the positioning plate 5. After installation, the top plate 11 and the bottom plate 3 are located on both sides of the door frame 91, and the protrusions on the edge of the door frame 91 are located between the hook plate 21 and the positioning plate 5. Figure 11 As shown, at this time, the roller 71 on the positioning plate 5 is in contact with the surface of the door frame 91.

[0071] Insert one end of the black film 92 into the gap between the sliding member and the door frame 91 (at this time, the black film 92 is located between the door frame 91 and the flexible pillar 61), then tear off the protective film on it, and pass the other end of the black film 92 around the pulley roller 13 on the top plate 11 to complete the installation of the black film 92.

[0072] When the sliding member is pushed, the flexible post 61 on the sliding member is in contact with the surface of the black film 92, so the flexible post 61 squeezes the black film 92 during the sliding process. In addition, since the roller 71 on the positioning plate 5 is connected to the surface of the door frame 91, the sliding member can drive the roller 71 and the flexible post 61 connected to the roller 71 to rotate during the movement of the sliding member along the door frame 91. The connecting gear 72 is connected to the roller 71, and the driven gear 74 is connected to the flexible post 61. The outer diameter of wheel 72 is larger than the outer diameter of driven gear 74. Since the outer diameter of roller 71 is the same as the outer diameter of flexible column 61, when the driving gear 72 drives the driven gear 74 to rotate, the flexible column 61 connected to the driven gear 74 needs to rotate more than one revolution for the driving gear 72 to rotate one revolution. This allows the flexible column 61 to move relative to the black film 92 (forming a "scraper"). At the same time, since the flexible column 61 is made of flexible material (silicone), it will not damage the black film 92 during relative movement.

[0073] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pulley block tool for automotive interior black film, characterized by, The pulley block tool comprises: A sliding piece that can slide along the door frame (91); An extrusion assembly (6) is installed on the sliding piece, and when the sliding piece is connected with the door frame (91), the extrusion assembly (6) is attached to the side of the door frame (91) to be pasted with the film; Wherein, the sliding piece is connected with a transmission assembly (7), and the transmission assembly (7) is connected with the extrusion assembly (6) to provide power for the rotation of the extrusion assembly (6); When the sliding piece slides along the door frame (91), the transmission assembly (7) drives the extrusion assembly (6) to scrape the car film (92), and the rotating distance of the extrusion assembly (6) is greater than the moving distance of the sliding piece.

2. A pulley block tool for applying a black film to an automotive interior as claimed in claim 1, wherein: The sliding piece comprises an upper and lower corresponding bearing seat (1) and a bottom plate (3), and the two are connected by a connecting rod (4), and the extrusion assembly (6) is connected between the bearing seat (1) and the bottom plate (3); Wherein, the top of the bearing seat (1) is connected with a limiting piece, and the sliding assembly is connected with the door frame (91) through the limiting piece.

3. A pulley block tool for applying an automotive interior black film according to claim 2, wherein: The limiting piece comprises a pressing plate (2) movably connected to the top of the bearing seat (1), and the front end of the pressing plate (2) is connected with a hook plate (21), when the sliding seat is connected with the door frame (91), the hook plate (21) and the positioning plate (5) on the bearing seat (1) clamp the door frame (91), and the extrusion assembly (6) is attached to the surface of the door frame (91).

4. A pulley block tool for applying an automotive interior black film according to claim 3, wherein: The bearing seat (1) comprises a "H" shaped top plate (11), and the front end of the top plate (11) is connected with two mutually parallel extension heads (12), the pressing plate (2) is connected between the two extension heads (12) through a torsion spring, and the pressing plate (2) rotates to the direction of the positioning plate (5) under the driving of the torsion spring; Wherein, the positioning plate (5) is connected between the two extension heads (12) and below the extension heads (12).

5. A pulley block tool for applying an automotive interior black film according to claim 2, wherein: The extrusion assembly (6) comprises three groups of flexible columns (61) opposite to each other, and adjacent two flexible columns (61) are connected through universal shafts (62), and the flexible columns (61) at the ends are respectively connected with the bottom plate (3) and the transmission assembly (7) through the universal shafts (62).

6. A pulley block tool for applying an automotive interior black film according to claim 5, wherein: The bearing seat (1) and the bottom plate (3) are connected with a positioning frame (8), and the bottom plate (3) fixes the extrusion assembly (6) through the positioning frame (8); Wherein, the positioning frame (8) comprises a center rod (81) connected between the bearing seat (1) and the bottom plate (3), and a support (82) is sleeved on the center rod (81), and the support (82) is connected with the universal shaft (62) through the extension arm (83) outside it.

7. A pulley block tool for applying an automotive interior black film according to claim 4, wherein: The transmission assembly (7) is installed inside the bearing seat (1), and the transmission assembly (7) comprises a roller (71) and a driven gear (74) connected with each other, the roller (71) is installed in the positioning plate (5), and when the sliding seat is connected with the door frame (91), the roller (71) inside the positioning plate (5) is attached to the edge of the door frame (91); The driven gear (74) is connected with the extrusion assembly (6), and when the roller (71) rotates, the torsion can be transmitted to the extrusion assembly (6) through the driven gear (74).

8. A pulley block tool for applying an automotive interior black film according to claim 7, wherein: The inside of the bearing seat (1) is embeddedly provided with a linkage gear (72), and two transmission gears (73) are connected between the linkage gear (72) and the driven gear (74) and mesh with each other, the linkage gear (72) and the driven gear (74) are respectively meshed with one of the transmission gears (73); Wherein, the linkage gear (72) and the roller (71) are connected through a connecting rod; The outer diameter of the linkage gear (72) is greater than the outer diameter of the driven gear (74), and the two transmission gears (73) are of the same specification.

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