A film application device

Abstract

This invention provides a screen protector application device, including a bracket, a positioning component mounted on the bracket for fixing a mobile phone case, and a screen protector application component fixed on the bracket below the positioning component for fixing a film. The positioning component includes a positioning plate for fixing the mobile phone case and a guide component disposed between the positioning plate and a vertical support frame. The screen protector application component includes an elastic support component fixed on a base and a vertical support block passing through the center of the elastic support component. The bottom-edge screen protector application device provided by this invention positions the mobile phone case using the positioning plate in the positioning component fixed on the frame, improving the positioning accuracy of the mobile phone case. Under the guidance of the guide component, the positioning plate moves to the elastic screen protector application component where the film is placed, and the film adheres to the bottom of the mobile phone case. This prevents gaps between the film and the mobile phone case. The guide component limits and guides the positioning plate, ensuring the parallelism between the film and the bottom of the mobile phone case and improving the stability of the positioning plate as it moves up and down on the bracket.

Description

Technical Field

[0001] This invention belongs to the field of mobile phone casing processing technology, and in particular relates to a film application device. Background Technology

[0002] With the improvement of people's living standards, mobile phones and other electronic devices have become essential products in people's daily lives. As the mobile phone market rapidly expands, the demand for mobile phone casing processing is increasing. Traditional mobile phone casing application methods are inefficient and cannot meet the large market demand. Current mobile phone casing application equipment uses wire cutting of steel to ensure high wear resistance for the plates fixing the film. However, in actual production, using steel plates to fix the film is prone to bumping into the mobile phone casing during application, causing wear on the steel surface. Furthermore, existing mobile phone casing application equipment cannot meet the precision requirements for the flatness of the mobile phone casing during application, easily resulting in gaps between the mobile phone casing and the film after application, thus increasing labor costs and reducing processing efficiency. Summary of the Invention

[0003] The purpose of this invention is to solve the shortcomings of existing mobile phone case film application devices, which are difficult to meet the precision requirements of the flatness of the mobile phone during the film application process and are prone to gaps between the film and the mobile phone case after the film is applied, and to provide a film application device.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a film application device for attaching a film to the bottom surface of a mobile phone case, characterized in that it includes a bracket, a positioning component disposed on the bracket for fixing the mobile phone case, and a film application component fixed on the bracket and located below the positioning component for fixing the film.

[0005] The bracket includes a base for fixing the film application assembly and a vertical support frame disposed on the base, and the positioning assembly is movably connected to the vertical support frame;

[0006] The positioning component includes a positioning plate for fixing the phone case and a guide component disposed between the positioning plate and the vertical support frame;

[0007] The film application assembly includes an elastic support component fixed on the base and a vertical support block passing through the center of the elastic support component.

[0008] Furthermore, the elastic support assembly includes a positioning base plate and a diaphragm positioning plate fixed on the base. The positioning base plate is provided with at least one pair of elastic guide posts, and the diaphragm positioning plate is elastically connected to the positioning base plate through the elastic guide posts.

[0009] Specifically, the diaphragm positioning plate has a mounting hole at its center, and the bottom of the vertical support block is fixed to the positioning base plate and can float within the mounting hole.

[0010] Specifically, the top surface of the positioning base plate is provided with an installation groove into which the vertical support block can be embedded, and the bottom of the positioning base plate is provided with a fixing hole that extends into the installation groove. The connector passes through the fixing hole and is locked to the bottom of the vertical support block.

[0011] Furthermore, the elastic support assembly also includes a silicone pad disposed on the top of the vertical support block and located in the mounting hole of the diaphragm positioning plate.

[0012] Specifically, the top of the vertical support block is provided with a slot for the silicone pad to be inserted. The silicone pad includes a horizontal support pad and a positioning block located at the bottom of the horizontal support pad. The positioning block of the silicone pad is inserted into the slot of the vertical support block.

[0013] Furthermore, the guide assembly includes a linear guide rail fixed to the vertical support frame and a slider disposed on the linear guide rail, and the positioning plate is fixed to the slider.

[0014] Furthermore, the guide assembly also includes a spring disposed between the slider and the vertical support frame, and a pin for fixing the spring is disposed at the top of the vertical support frame, with one end of the spring fixed to the slider and the other end fixed to the pin.

[0015] Furthermore, the positioning plate of the positioning component is provided with at least one pair of positioning pins for fixing the mobile phone casing.

[0016] Specifically, the positioning plate is provided with several transverse waist-shaped holes at its center, which are fixedly connected to the slider, and the positioning plate passes through the transverse waist-shaped holes.

[0017] The beneficial effects of the screen protector device provided by the present invention are as follows: the positioning plate in the positioning assembly fixed on the bracket positions the mobile phone housing, thereby improving the positioning accuracy of the mobile phone housing. Then, the positioning plate is pressed down, causing it to move under the guidance of the guide assembly to the elastic screen protector assembly where the screen protector is placed, so that the screen protector is completely attached to the bottom of the mobile phone housing, preventing gaps between the screen protector and the mobile phone housing. The guide assembly limits and guides the positioning plate as it moves from the positioning plate that is pressing and fixing the mobile phone housing to the elastic support assembly, ensuring the parallelism between the screen protector and the bottom of the mobile phone housing and improving the stability of the positioning plate as it moves up and down on the bracket. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a film-applying device provided by the present invention.

[0019] Figure 2 This is a side sectional view of a film-applying device provided by the present invention.

[0020] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 4 yes Figure 2 A magnified view of a section at point B in the middle.

[0022] Figure 5 This is a front view of a film-applying device provided by the present invention.

[0023] In the picture: 100 - film application device

[0024] 10-Bracket, 11-Vertical support frame, 12-Base, 20-Positioning component, 21-Positioning plate,

[0025] 211-Locking pin, 212-Horizontal oblong hole, 22-Guide assembly, 221-Linear guide rail,

[0026] 222-Pin, 223-Spring, 224-Slider, 30-Film Application Assembly, 31-Elastic Support Assembly

[0027] 311-Diaphragm positioning plate, 3111-Mounting hole, 312-Positioning base plate, 3121-Mounting groove

[0028] 3122-Fixing hole, 313-Elastic guide post, 32-Vertical support block, 321-Slot, 33-Silicone pad

[0029] 331 - Horizontal support pad, 332 - Positioning block. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] See Figures 1-5This invention provides a screen protector applicator 100 for attaching a film to the bottom surface of a mobile phone case. The applicator includes a bracket 10, a positioning component 20 mounted on the bracket 10 for fixing the mobile phone case, and a screen protector applicator 30 mounted on the bracket 10 below the positioning component 20 for fixing the film. The mobile phone case is fixedly mounted on the positioning component 20 mounted on the bracket 10. Then, the positioning component 20 is pressed downwards, causing it to move the mobile phone case vertically downwards relative to the bracket 10. Continuing to press the positioning component 20 downwards moves the mobile phone case to the screen protector applicator 30 mounted on the bracket 10 below the positioning component 20, causing the film on the screen protector applicator 30 to adhere to the bottom of the mobile phone case. During the process of pressing down on the positioning component 20 to move the phone case fixedly mounted on the positioning component 20 vertically downward relative to the bracket 10 to the screen protector assembly 30, the bottom of the phone case remains parallel to the screen protector, ensuring that the screen protector at the screen protector assembly 30 is completely adhered to the bottom of the phone case, thus preventing gaps between them. The bracket 10 includes a base 12 for fixing the screen protector assembly 30 and a vertical support frame 11 disposed on the base 12. The positioning component 20 is movably connected to the vertical support frame 11. The vertical support frame 11 is perpendicular to the base 12. The screen protector assembly 30 is fixed to the base 12. After fixing the phone case to the positioning component 20, pressing down on the positioning component 20 causes it to move vertically downward relative to the vertical support frame 11, moving the phone case fixed on the positioning component 20 vertically downward to the screen protector assembly 30, and completely adhering the screen protector fixed on the screen protector assembly 30 to the bottom of the phone case. By fixing the film application component 30 to the base 12, the stability of the fixed connection between the film application component 30 and the bracket 10 can be ensured. This prevents the film application component 30 from being displaced relative to the bracket 10 during the process of pressing the positioning component 20 to completely attach the film to the phone case on the positioning component 20, thus affecting the film application effect of the film application device 100.

[0032] The positioning component 20 includes a positioning plate 21 for fixing the phone case and a guide component 22 disposed between the positioning plate 21 and the vertical support frame 11. The phone case is fixedly installed on the positioning plate 21 in the positioning component 20. Then, the positioning plate 21 is pressed down, so that the positioning plate 21 is vertically downward relative to the vertical support frame 11 under the guidance of the guide component 22 disposed between the positioning plate 21 and the vertical support frame 11. The positioning plate 21 is pressed down continuously to completely attach the film fixed at the film application component 30 to the bottom of the phone case. Then, the positioning plate 21 is released, the downward pressing state of the positioning plate 21 is released, so that the positioning plate 21 returns to its original state under the action of the guide component 22. Under the guidance of the guide component 22, the parallelism between the positioning plate 21 and the vertical support frame 11 during the vertical lifting and lowering process of the positioning plate 21 relative to the vertical support frame 11 along the direction set by the guide component 22 can be effectively guaranteed. This improves the parallelism between the bottom of the mobile phone shell on the positioning plate 21 and the film fixed on the film application component 30, thereby further ensuring that the film fixed on the film application component 30 is completely attached to the bottom of the mobile phone shell on the positioning plate 21. The film application component 30 includes an elastic support component 31 on the fixed base 12 and a vertical support block 32 passing through the center of the elastic support component 31. The diaphragm is fixed to the top of the vertical support block 32, which passes through the center of the elastic support assembly 31. The positioning plate 21 is pressed down so that the bottom of the phone case fixed on the positioning plate 21 abuts against the diaphragm fixed to the top of the vertical block. At this time, the positioning plate 21 is pressed down continuously. Under the action of the vertical downward pressure, the bottom of the phone case fixed on the positioning plate 21 presses down on the elastic support assembly 31. At this time, the vertical support block 32, which passes through the center of the elastic support assembly 31, remains fixed. Under the action of the vertical downward pressure applied by the phone case, the elastic support assembly 31 moves vertically downward relative to the vertical support block 32, so that the diaphragm fixed to the top of the vertical support block 32 is exposed and completely attached to the bottom of the phone case. After the film is attached, the positioning plate 21 drives the phone case to move vertically upward relative to the vertical support frame 11 to the original position under the action of the guide assembly 22. The vertical downward pressure applied to the elastic support assembly 31 is released, so that the elastic support assembly 31 elastically returns to its original state. The elastic support component 31 allows for a certain amount of elastic movement between the elastic support components 31 during the process of the pressing positioning plate 21 attaching the film to the bottom of the phone case. This prevents the elastic support components 31 from bumping against each other and thus wearing down the elastic support components 31 during the process of the phone case pressing down on the elastic support components 31.

[0033] Furthermore, such as Figure 2As shown, the elastic support assembly 31 includes a positioning base plate 312 fixed to the base 12 and a diaphragm positioning plate 311. The positioning base plate 312 is provided with at least one pair of elastic guide posts 313, and the diaphragm positioning plate 311 is elastically connected to the positioning base plate 312 through the elastic guide posts 313. A mounting hole 3111 is provided at the center of the diaphragm positioning plate 311, and the bottom of the vertical support block 32 is fixed to the positioning base plate 312 and can float within the mounting hole 3111. The continuous downward pressure on the positioning plate 21 causes the bottom of the phone case fixed on the positioning plate 21 to abut against the diaphragm on the top of the vertical support block 32 fixed in the elastic support assembly 31. At this time, the two sides of the bottom of the phone case abut against the upper surface of the mounting hole 3111 located at the center of the diaphragm positioning plate 311. During the continuous downward pressure on the positioning plate 21, under the combined action of the vertical downward pressure applied by the phone case and the elastic guidance of the elastic guide post 313 located on the positioning base plate 312, the diaphragm positioning plate 311 is vertically downward relative to the vertical support block 32, causing the diaphragm fixed on the top of the vertical support block 32 to be exposed and completely attached to the bottom of the phone case. Subsequently, the positioning plate 21 returns to its original position under the action of the guide assembly 22, and the diaphragm positioning plate 311 returns to its original position under the elastic guidance of the elastic guide post 313. Four elastic guide posts 313 are evenly arranged on the positioning base plate 312. Under the action of the elastic guide posts 313, during the process of the diaphragm positioning plate 311 moving vertically downward relative to the vertical support block 32, an elastic space is always maintained between the diaphragm positioning plate 311 and the positioning base plate 312 to prevent collisions between the diaphragm positioning plate 311 and the positioning base plate 312, thereby preventing wear and tear. Through the mounting hole 3111 provided at the center of the diaphragm positioning plate 311 for the vertical support block 32 to pass through, the diaphragm positioning plate 311 can be guided during the process of moving vertically downward relative to the vertical support block 32, ensuring the perpendicularity between the vertical support block 32 and the diaphragm positioning plate 311, preventing relative displacement of the vertical support block 32, thereby further ensuring the parallelism between the diaphragm fixed to the top of the vertical support block 32 and the bottom of the mobile phone housing fixed to the positioning plate 21, so that the diaphragm can be completely attached to the bottom of the mobile phone housing.

[0034] Specifically, such as Figure 2 and Figure 3As shown, the top surface of the positioning base plate 312 is provided with a mounting groove 3121 into which the vertical support block 32 can be embedded. The bottom of the positioning base plate 312 is provided with a fixing hole 3122 that extends into the mounting groove 3121. The connector passes through the fixing hole 3122 and is locked to the bottom of the vertical support block 32. The bottom of the vertical support block 32 is embedded in the mounting groove 3121 on the top of the positioning base plate 312. The bottom of the vertical support block 32 and the mounting groove 3121 on the top of the positioning plate 21 are interference-fitted, so that the vertical support block 32 and the positioning base plate 312 are fixedly connected, thereby limiting the axial and radial displacement of the vertical support block 32 and preventing relative displacement between the vertical support block 32 and the positioning base plate 312 during the process of the diaphragm support plate moving vertically downward relative to the vertical support block 32. The bottom of the vertical support block 32 is fitted into the mounting groove 3121 at the top of the positioning base plate 312, so that the center of the threaded hole at the bottom of the vertical support block 32 and the fixing hole 3122 at the bottom of the positioning plate 21 that extends into the mounting groove 3121 are on the same vertical line, thereby ensuring the concentricity between the threaded hole at the bottom of the vertical support block 32 and the fixing hole 3122 at the bottom of the positioning plate 21. Then, using fasteners such as pins, screws, and studs, the vertical support block 32 is locked into the mounting groove 3121 of the positioning base plate 312, thereby ensuring the stability of the fixed connection between the vertical support block 32 and the positioning base plate 312, and further preventing relative displacement between the vertical support block 32 and the positioning base plate 312 when the diaphragm support plate is vertically downward relative to the vertical support frame 11, thus ensuring the parallelism between the diaphragm fixed at the top of the vertical support block 32 and the bottom of the mobile phone casing.

[0035] Furthermore, such as Figure 3As shown, the elastic support assembly 31 also includes a silicone pad 33 disposed on the top of the vertical support block 32 and located within the mounting hole 3111 of the diaphragm positioning plate 311. The top of the vertical support block 32 has a slot 321 for the silicone pad 33 to be inserted. The silicone pad 33 includes a horizontal support pad 331 and a positioning block 332 located at the bottom of the horizontal support pad 331. The positioning block 332 of the silicone pad 33 is inserted into the slot 321 of the vertical support block 32. The positioning block 332 of the silicone pad 33 is fitted into the slot 321 at the top of the vertical support block 32, and there is an interference fit between the positioning block 332 and the slot 321, thus fixing the silicone pad 33 to the vertical support block 32. The diaphragm is fixed to the horizontal support pad 331 of the silicone pad 33. When the bottom of the phone case fixed to the positioning plate 21 abuts against the diaphragm on the horizontal support pad 331, the bottom of the phone case applies a vertically downward force to the diaphragm support block. The silicone pad 33 is fixedly connected to the vertical support block 32, and the vertical support block 32 is fixedly connected to the bracket 10 of the positioning base plate 312. Therefore, the diaphragm support plate is vertically downward relative to the support block, causing the diaphragm fixed to the horizontal support pad 331 of the silicone pad 33 to protrude outside the diaphragm positioning plate 311 and completely adhere to the bottom of the phone case. Through the interference fit between the positioning block 332 of the silicone pad 33 and the slot 321 at the top of the vertical support block 32, the silicone pad 33 and the vertical support block 32 are fixedly connected, thereby preventing the silicone pad 33 from falling off the vertical support when the diaphragm fixed to the silicone pad 33 is attached to the bottom of the phone case. The silicone pad 33 located on top of the vertical support block 32 effectively prevents the bottom of the phone case from bumping against the vertical support block 32, thus preventing damage to both the phone case and the vertical support block 32. Simultaneously, by placing the film on the horizontal support pad 331 of the silicone pad 33, the horizontal support pad 331 can fully contact the bottom of the phone case when the film is attached, ensuring complete adhesion of the film to the bottom of the phone case.

[0036] Furthermore, such as Figure 4 and Figure 5As shown, the guide assembly 22 includes a linear guide rail 221 fixed to the vertical support frame 11 and a slider 224 disposed on the linear guide rail 221, with a positioning plate 21 fixed to the slider 224. The linear guide rail 221 in the guide assembly 22 has several threaded holes that are fixedly connected to the vertical support frame 11. The vertical support frame 11 also has several threaded holes that mate with the threaded holes on the linear guide rail 221. When the linear guide rail 221 is fixedly installed on the vertical support frame 11, it is necessary to ensure that the centers of the threaded holes on the linear guide rail 221 and the threaded holes on the vertical support frame 11 are on the same horizontal line to ensure concentricity. Then, the linear guide rail 221 is locked to the vertical support frame 11 using bolts, studs, pins, and other fasteners to ensure the stability of the fixed connection between the linear guide rail 221 and the vertical support frame 11. The positioning plate 21 also has several horizontally shaped holes 212 at its center, which are fixedly connected to the slider 224. The positioning plate 21 is fixedly connected to the slider 224 through these horizontally shaped holes 212. The slider 224 has several connecting holes that mate with the horizontally shaped holes 212 at the center of the positioning plate 21. The relative position between the positioning plate 21 and the slider 224 can be adjusted according to actual needs through the horizontally shaped holes 212 on the positioning plate 21. Then, the positioning plate 21 is locked onto the slider 224 by bolts, studs, pins, and other fixing connectors, so that the positioning plate 21 and the slider 224 are fixedly connected. The mobile phone case is fixedly installed on the positioning plate 21, and then the positioning plate 21 is pressed down, so that the positioning plate 21 moves vertically downward relative to the vertical support frame 11 along the direction set by the linear guide 221 through the slider 224 movably connected to the linear guide 221 to the silicone pad 33 at the top of the vertical support block 32, and the film on the silicone pad 33 is completely attached to the bottom of the mobile phone case. After the film is applied, the positioning plate 21, via the slider 224, moves the phone casing vertically upwards along the direction set by the linear guide 221 to return to its original position. The slider 224 moves the positioning plate 21 vertically up and down relative to the vertical support plate along the direction set by the linear guide 221. This effectively limits and guides the positioning plate 21 fixed to the slider 224, ensuring the parallelism between the bottom of the phone casing fixed to the positioning plate 21 and the film on the silicone pad 33 fixed to the top of the vertical support block 32. This allows the film to adhere completely to the bottom of the phone casing, preventing gaps and improving the film application effect of the film application device 100.

[0037] Furthermore, such as Figure 4As shown, the guide assembly 22 also includes a spring 223 disposed between the slider 224 and the vertical support frame 11. A pin 222 for fixing the spring 223 is disposed at the top of the vertical support frame 11. One end of the spring 223 is fixed to the slider 224, and the other end is fixed to the pin 222. The vertical support frame 11 and the pin 222 are fixedly connected. The slider 224 is connected to the vertical support frame 11 via the spring 223, which is fixed at one end to the slider 224 and at the other end to the pin 222. When the positioning block 332 is pressed down, causing the positioning block 332 to move the phone case vertically downward relative to the linear guide rail 221 via the slider 224, the slider 224 pulls the spring 223 vertically downward, causing the spring 223 to undergo elastic deformation and generate an upward elastic force. After the positioning block 332 is pressed down, the diaphragm on the silicone pad 33 fixed to the top of the vertical support block 32 is completely attached to the bottom of the phone case. Under the action of the upward elastic force generated by the spring 223 due to its elasticity, the spring 223 pulls the slider 224 and causes the positioning plate 21 to rise vertically to the original position on the linear guide rail 221 along the direction set by the linear guide rail 221. During the vertical descent of the positioning plate 21 on the linear guide rail 221, driven by the slider 224, the spring 223 applies a certain upward elastic force to the slider 224, thereby offsetting part of the squeezing force exerted by the positioning plate 21 on the slider 224 when the positioning plate 21 is pressed down. This prevents the positioning plate 21 from directly colliding with the vertical support plate under its own weight, thus avoiding wear on the positioning plate 21 and the vertical support plate. After the film is applied, the upward elastic force generated by the elastic deformation of the spring 223 drives the slider 224 to rise vertically back to its original position. This limits the relative displacement of the slider 224 on the linear guide rail 221 during vertical ascent, preventing the slider 224 from detaching from the linear guide rail 221 or colliding with the vertical support frame 11. The positioning plate 21 of the positioning assembly 20 is provided with at least one pair of positioning pins 211 for fixing the phone casing. The positioning plate 21 is provided with two positioning pins 211, which are arranged diagonally on the positioning plate 21 to fix the mobile phone shell at two points. This improves the stability and positioning accuracy of the mobile phone shell fixed on the positioning plate 21 and prevents the mobile phone shell from falling off the positioning plate 21 during the vertical lifting and lowering process of the mobile phone shell on the linear guide rail 221 via the slider 224.

[0038] The film application device 100 positions the phone case using a positioning plate 21 in a positioning assembly 20 fixed to the frame, improving the positioning accuracy of the phone case. Then, it presses down on the positioning plate 21, causing it to move under the guidance of the guide assembly 22 to the elastic film application assembly 30 where the film is placed, and the film is attached to the bottom of the phone case. This ensures that the film is completely attached to the bottom of the phone case and prevents gaps between the film and the phone case. The guide assembly 22 limits and guides the positioning plate 21 as it moves from the positioning plate 21 to the elastic support assembly 31, ensuring the parallelism between the film and the bottom of the phone case and improving the stability of the positioning plate 21 as it moves up and down on the bracket 10.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, alterations, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A film applicator for attaching a film to the bottom surface of a mobile phone casing, characterized in that, It includes a bracket, a positioning component disposed on the bracket for fixing the mobile phone housing, and a film-applying component fixed on the bracket and located below the positioning component for fixing the film; The bracket includes a base for fixing the film application assembly and a vertical support frame disposed on the base, and the positioning assembly is movably connected to the vertical support frame; The positioning component includes a positioning plate for fixing the mobile phone housing and a guide component disposed between the positioning plate and the vertical support frame; The film application assembly includes an elastic support component fixed on the base and a vertical support block passing through the center of the elastic support component. The elastic support assembly includes a positioning base plate and a diaphragm positioning plate fixed on the base. The positioning base plate is provided with at least one pair of elastic guide posts, and the diaphragm positioning plate is elastically connected to the positioning base plate through the elastic guide posts. The diaphragm positioning plate has a mounting hole at its center, and the bottom of the vertical support block is fixed to the positioning base plate and can float within the mounting hole; The elastic support assembly also includes a silicone pad disposed on the top of the vertical support block and located in the mounting hole of the diaphragm positioning plate; The top of the vertical support block is provided with a slot for the silicone pad to be inserted. The silicone pad includes a horizontal support pad and a positioning block located at the bottom of the horizontal support pad. The positioning block of the silicone pad is inserted into the slot of the vertical support block, and the diaphragm is fixed on the horizontal support pad of the silicone pad. The top surface of the positioning base plate is provided with an installation groove into which the vertical support block can be embedded, and the bottom of the positioning base plate is provided with a fixing hole that extends into the installation groove. The connector passes through the fixing hole and is locked to the bottom of the vertical support block. The guide assembly includes a linear guide rail fixed to the vertical support frame and a slider disposed on the linear guide rail, and the positioning plate is fixed to the slider; the guide assembly also includes a spring disposed between the slider and the vertical support frame, and a pin for fixing the spring is disposed at the top of the vertical support frame, one end of the spring is fixed to the slider, and the other end is fixed to the pin; The positioning plate is also provided with several horizontal waist-shaped holes at the center, which are fixedly connected to the slider. The positioning plate can adjust the relative position between the positioning plate and the slider through the horizontal waist-shaped holes.

2. The film-applying device as described in claim 1, characterized in that, The positioning plate of the positioning component is provided with at least one pair of positioning pins for fixing the mobile phone casing.

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