Automatic tearing device for back glue of floodlight of mobile phone face shell assembly

Abstract

The invention discloses an automatic tearing device for back glue of a floodlight of a mobile phone face shell assembly. The automatic tearing device mainly comprises a belt winding assembly, a conveying belt, an outer pressing block, an inner pressing block, two roller assemblies and a control system. The belt winding assembly tightens and conveys the adhesive tape, the conveying belt conveys the mobile phone face shell and is located below the adhesive tape horizontal conveying section, and the conveying directions are parallel. The inner pressing block is connected to the bottom end of the outer pressing block through magnetic attraction or elasticity, the bottoms of the inner pressing block and the outer pressing block are flush in a normal state; the roller assemblies are located below the two sides of the inner pressing block. The control system controls the driving equipment to move downwards the transmission column, the inner pressing block drives the adhesive tape to make contact with the roller assembly and extrudes the attached back adhesive, after the pressing block, the adhesive tape and the roller assembly rotate by a set angle, the inner pressing block and the roller assembly reset, the back adhesive is automatically torn down and conveyed out along with tightening conveying of the adhesive tape, and automatic back adhesive tearing is achieved. According to the invention, the back glue of the floodlight on the mobile phone surface shell can be automatically and reliably torn off, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of mobile phone casing production equipment technology, specifically to an automatic adhesive removal device for the backing of a mobile phone front casing assembly diffuser. Background Technology

[0002] During the mobile phone manufacturing process, it is necessary to tear off items such as... Figure 14 The image shows a type of LED backing adhesive 27 in a mobile phone case 28. This backing adhesive 27 is typically rectangular, and the length of the backing adhesive 27 varies slightly between different phone cases 28 within the same series. Specifically, during manufacturing, because the area around the backing adhesive 27... Figure 14 As shown, the structure has several other similar protrusions, which makes it difficult to remove the backing adhesive 27 of the diffuser lamp, especially difficult to remove manually. This results in difficulty in removing the backing adhesive 27 of the diffuser lamp, low production efficiency of the phone cover 28, and serious impact on the phone production and assembly progress. Moreover, if the backing adhesive 27 of the diffuser lamp is removed manually, it is easy to contaminate the phone cover 28 due to frequent hand contact, and the residual adhesive on the backing adhesive 27 may be accidentally stuck to other parts of the phone cover 28.

[0003] More specifically, in practice, around the backing adhesive 27 of the diffuser, especially on the front and back sides, that is, on both sides in the width direction of the backing adhesive 27 of the diffuser, there are usually other auxiliary structures of the phone case 28 close to it, which undoubtedly further increases the difficulty of removing the backing adhesive 27 of the diffuser. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automatic removal device for the adhesive backing of mobile phone front cover components, thereby solving the current problem of the inability to automatically and efficiently remove this type of adhesive backing.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an automatic adhesive removal device for a mobile phone faceplate assembly diffuser, comprising a tape winding assembly for tautening and transmitting the tape and a transmission belt for transmitting the mobile phone faceplate, wherein the transmission direction of the mobile phone is parallel to the horizontal transmission section of the tape and is located below the tape. It also includes an outer pressure block and an inner pressure block, and two roller assemblies located on the left and right sides below the inner block. The roller assemblies are arranged axially along the width of the belt. The inner pressure block is connected to the bottom of the outer pressure block by magnetic attraction or elastic force, and the bottoms of the two are flush under normal conditions. The transmission column at the top of the inner pressure block extends vertically through the top of the outer pressure block and is connected to the drive device. It also includes a control system. When the phone case is transported to the bottom of the horizontal transmission section, the drive device moves the transmission column downward so that the bottom of the inner block slides out of the bottom of the outer pressure block. Then, the corresponding part of the tape contacts the roller assembly, and the tape of the corresponding part is squeezed downward between the two roller assemblies to adhere to the backing adhesive of the diffuser on the phone case. At this time, the pressure block, tape and roller assembly rotate forward together by a set angle. After the drive device drives the transmission column and the inner pressure block to axially retract and reset, the roller assembly swings back to reset, so that the backing adhesive of the diffuser is automatically torn off under the tension of the tape and transported out with the tape.

[0006] Furthermore, the part of the transmission column that protrudes from the outer pressure block has a limiting ring. When the limiting ring contacts the top surface of the outer pressure block, the inner pressure block, along with the corresponding adhesive tape, is pressed onto the backing adhesive of the diffuser lamp.

[0007] Furthermore, the tape includes a first tape and two second tapes arranged parallel to each other below the outer pressure block. The adhesive surface of the first tape faces downward, and the adhesive surface of the second tape faces upward. The second tape is narrower than the first tape, and the two second tapes are symmetrically arranged on the front and rear sides in the width direction of the second tape. The roller assembly includes a first roller and a second roller coaxially rotatably mounted. The two rollers are respectively used to contact the smooth surfaces of the two second tapes above them, and cannot contact the first tape. So that when the inner pressure block and the outer pressure block move down synchronously during the downward movement of the transmission column, the first tape is pressed down to bond with the second tape, and then the second tape contacts the two rollers. Under the pressure and guidance of the rollers, the two tapes after bonding move downward together to the position where they are bonded to the back adhesive of the diffuser lamp.

[0008] Furthermore, the rollers of the roller assembly are elastically telescopically mounted in the horizontal direction via a mounting handle and a cylindrical spring located within the mounting handle.

[0009] Furthermore, the driving device includes a first transmission wheel and a telescopic rod vertically fixed on its axle. The telescopic rod is coaxially fixedly connected to the transmission column. When the first transmission wheel rotates to the point where the telescopic rod is in a vertical position, after the first transmission wheel stops rotating, the telescopic rod extends downward to the position where the tape is bonded to the backing of the diffuser lamp. Subsequently, the first transmission wheel continues to rotate and the hydraulic rod retracts and resets when it reaches a set angle.

[0010] Furthermore, the conveyor belt is driven by the second drive wheel, which is connected to the first drive wheel so that when the telescopic rod rotates forward with the drive column, the conveyor belt moves backward with the phone case so as to peel off the backing adhesive of the diffuser lamp.

[0011] Furthermore, an L-shaped positioning block is fixed on the conveyor belt. The positioning block is inserted into the end of the phone case for positioning and installation, and prevents the phone case from moving when the backing adhesive of the discrete light is peeled off.

[0012] Furthermore, the winding assembly includes several first winding wheel groups and second winding wheel groups located on the right side. Each second winding wheel group has two winding wheels coaxially arranged to wind and drive two second rubber belts respectively. Two rotating wheels are coaxially and slidably sleeved on a core column. The core column is rotatably mounted on a frame via bearings at both ends. A screw is coaxially and rotatably mounted inside the core column. One end of the screw extends beyond the end of the core column and is fixed with a driven wheel that can be transmitted to a power device. A sliding hole is provided on the side wall of the core column. A threaded sleeve is fixed to the inner side wall of the rotating wheel via a slider. The slider is slidably installed in the sliding hole, and the threaded sleeve is threaded onto the screw. When the screw rotates, the two rotating wheels move synchronously towards or away from each other to correspond to the different spacing required by the two second tapes. A pressure ring is also fixed near the end of the screw. A tightening cap is threadedly fitted onto the end of the core column. When the tightening cap is tightened on the end of the core column, it axially presses against the pressure ring, thus fixing the screw and the core column as one unit.

[0013] Furthermore, the inner pressure block includes a first block and a second block, which are elastically connected as one unit by several tearing springs, so that when the backing adhesive of the diffuser is torn off, it is squeezed by the elastic variable force and prevents the pressure block from getting stuck when rotating forward.

[0014] Furthermore, a pair of roller assemblies are provided in both the width and length directions of the tape, so that the shape and size of the tape portion for contacting and bonding with the backing adhesive of the diffuser lamp are consistent with those of the backing adhesive of the diffuser lamp.

[0015] (III) Beneficial Effects This invention provides an automatic device for removing the adhesive backing of a mobile phone case assembly's diffuser light. It offers the following advantages: The device utilizes nested pressure blocks to gradually press multiple layers of adhesive tape together. Following the extrusion of the adhesive tape for bonding the diffuser light by a roller assembly, the device automatically and quickly peels off the adhesive backing as the phone case rotates and the phone case moves. The peeled adhesive backing is then automatically collected into a roll for convenient centralized processing.

[0016] In addition, during the operation, the second tape, which plays an auxiliary role, covers a portion of the adhesive surface of the first tape to prevent this part of the adhesive surface from adhering to other structural features of the phone case, thus avoiding contamination of the phone case. At the same time, it facilitates low-friction or frictionless contact and engagement of the roller assembly rollers, improving the smoothness and reliability of the downward extrusion of the second tape used for bonding the backing adhesive of the diffuser lamp.

[0017] Finally, other technical effects of this invention will be further discussed in the following specific embodiments. Attached Figure Description

[0018] Figure 1 This is a partial structural diagram of an automatic adhesive removal device for a mobile phone faceplate assembly diffuser lamp in this invention. Figure 2 A bottom view showing the arrangement of the first and second tapes; Figures 3-6 The diagrams show the positions of the inner pressure block before it pushes the tape to adhere to the backing of the diffuser lamp. Figure 7 This is a schematic diagram showing the arrangement of the rollers on the roller assembly; Figure 8 This is a schematic diagram of the driving device in this invention driving the pressure block to squeeze the first tape; Figure 9 This is a schematic diagram of an installation structure for the second belt pulley assembly; Figure 10 for Figure 9 AA section view in the middle; Figure 11 This is a diagram showing the adhesive backing of a diffuser being peeled off. Figure 12 This is a schematic diagram showing the removal of the adhesive backing of the diffuser when a tearing spring is provided in this invention. Figure 13 A schematic diagram showing four sets of roller assemblies surrounding the inner pressure block; Figure 14 This is a schematic diagram showing the location of the adhesive backing for a diffuser light on a mobile phone case.

[0019] In the diagram: outer pressure block 1, inner pressure block 2, first block 201, second block 202, transmission column 3, tape 4, first tape 401, second tape 402, roller assembly 5, roller 501, cylindrical spring 502, mounting handle 503, magnet 6, return spring 7, limit ring 8, first transmission wheel 9, second transmission wheel 10, telescopic rod 11, wheel axle 12, transmission belt 13, positioning block 14, first winding wheel assembly 15, second winding wheel assembly 16, winding wheel 1601, core column 17, bearing 18, screw 19, driven wheel 20, pressure ring 21, tightening cover 22, locking screw 23, slider 24, threaded sleeve 25, tearing spring 26, diffuser backing adhesive 27, mobile phone front cover 28. Detailed Implementation

[0020] This specification will clearly and completely describe the technical solutions in the following embodiments based on the accompanying drawings. The embodiments described in this specification are only some embodiments of the present invention, not all embodiments. All other embodiments derived by those skilled in the art based on these embodiments without creative effort should fall within the protection scope of the present invention.

[0021] like Figure 14 The automatic adhesive removal device for removing the backing adhesive 27 of a mobile phone faceplate assembly, as shown, mainly comprises: a wrapping assembly for tightening and conveying the adhesive tape 4, and a conveyor belt 13 for conveying the mobile phone faceplate 28. Specifically, it includes a winding assembly for tautly conveying the adhesive tape 4, and a conveyor belt 13 for conveying the mobile phone faceplate 28. Figure 8 The transmission direction of the phone faceplate 28 is parallel to a horizontal transmission section of the tape 4, and the phone is located below the tape 4 so as to remove the backing adhesive 27 of the diffuser lamp; depending on the specific application scenario and installation structure, the transmission direction of the conveyor belt 13 and the tape 4 can be selected to be the same or opposite. For the automatic transport of tape 4, tape 4 can be a common transparent tape 4 with one side smooth and the other side adhesive. During installation, existing conventional transport elements, such as winding wheels or tape winding wheels, can be directly used for winding, guiding, and transporting. During the transport process, tape 4 should always be kept taut, which is a necessary condition for the transport of all strip or thread-like materials. Tape 4 is drawn from the tape roll and follows the set path, passing around a series of corresponding winding wheels 1601 (winding wheels or tape winding wheels) to reach the designated working position. Since it is taut throughout the process, when tape 4 is squeezed, tape 4 can move circumferentially relative to its winding wheel 1601 to adapt to this squeezing deformation. If necessary, a winding wheel 1601 with damping, similar to a measuring tape, can also be directly used for installation.

[0022] In this embodiment, see also Figure 1 It also includes an outer pressure block 1, an inner pressure block 2, and two roller assemblies 5 located on the left and right sides below the inner block. As one embodiment, the axial direction of the roller assembly 5 is arranged along the width direction of the conveyor belt 4. The inner pressure block 2 is magnetically or elastically connected to the bottom end of the outer pressure block 1, and normally their bottoms are flush. The transmission column 3 at the top of the inner pressure block 2 vertically extends through the top of the outer pressure block 1 and connects to the drive device. When using magnetic attraction, the annular magnet 6 is installed in the corresponding component; while elastic connection is as follows... Figure 1 Simply install the corresponding return spring 77 as shown. If the conveying of the phone case 28 is not significantly affected by magnetism, it is recommended to use a magnetic suction structure for installation.

[0023] In this embodiment, the action logic of each component can be defined by a control system. When the phone case 28 is transmitted to the bottom of the horizontal transmission section, the control system drives the transmission column 3 to move down, so that the bottom of the inner block slides out of the bottom of the outer pressure block 1 and then the corresponding part of the tape 4 contacts the roller assembly 5. The tape 4 of the corresponding part is squeezed downward between the two roller assemblies 5, so as to adhere to the backing adhesive 27 of the diffuser lamp on the phone case 28. At this time, the pressure block, tape 4 and roller assembly 5 rotate forward or swing at a small angle together and move out of the phone case 28. This avoids being hindered by other structural features inside the phone case 28 when tearing it in a relatively linear motion relative to the phone case 28. Moreover, during the tearing process, the roller assembly 5 rotates with the two pressure blocks at the corresponding angle, which can keep the tape 4 clamped during the tearing of the backing adhesive 27 of the diffuser lamp, so as to tear off the backing adhesive 27 of the diffuser lamp more quickly. Specifically, as a feasible operation, immediately after the backing adhesive 27 of the diffuser lamp is removed, the drive device drives the transmission column 3 and the inner pressure block 2 to axially retract and reset, that is, to release the contact with the tape 4. At this time, the corresponding portion of the tape 4, due to the tension and / or the restoration of the transmission force, immediately resets to a horizontal position, so that it can be automatically torn off and conveyed out along with the tape 4. In the above embodiment, for example, corresponding sensors can be set to determine whether the position of the phone case and the position of the pressure block are corresponding, or the above purpose can be achieved by precisely controlling the transmission speed and pause time of the conveyor belt 13.

[0024] In this embodiment, as another structure for the positioning inner pressure block 2, such as Figure 1 As shown, the part of the transmission column 3 that is exposed to the outer pressure block 1 has a limiting ring 8. When this limiting ring 8 contacts the top surface of the outer pressure block 1, the inner pressure block 2, with the corresponding adhesive tape 4, is pressed onto the back adhesive 27 of the diffuser lamp to avoid excessive pressure and damage to the phone case 28.

[0025] In practice, to achieve the downward protrusion of the tape 4 into the phone casing 28 and contact with the backing adhesive 27 of the diffuser lamp, the tape 4 must penetrate between the numerous structural features of the phone casing 28. This can easily lead to the tape 4 sticking to these structural features, hindering subsequent assembly and making it difficult to remove the backing adhesive 27 of the diffuser lamp. Therefore, as a recommended design structure, such as... Figure 2 As shown, the tape 4 in this embodiment includes a first tape 401 and two second tapes 402 arranged vertically and parallel to each other below the outer pressure block 1. The adhesive surface of the first tape 401 faces downward, and the adhesive surface of the second tapes 402 faces upward. The second tapes 402 are narrower than the first tape 401, and the two second tapes 402 are symmetrically arranged on the front and rear sides in the width direction of the second tapes 402. Meanwhile, as... Figure 7 and Figure 13The aforementioned roller assembly 5 includes a first roller and a second roller coaxially rotatably mounted. The two rollers 501 are respectively used to contact the smooth surfaces of the two second adhesive tapes 402 above them, and their axial lengths are such that they cannot contact the first adhesive tape 401, thus avoiding adhesion. Therefore, during the downward movement of the transmission column 3, when the inner pressure block 2 and the outer pressure block 1 move downwards synchronously, such as... Figure 5 First, press the first tape 401 until it bonds with the second tape 402 into a single unit, then... Figure 6 As shown, the second tape 402 is brought into contact with the two rollers 501, and under the squeezing and guiding of the rollers 501, the two tapes are moved downward together to the position where they are bonded to the backing adhesive 27 of the diffuser lamp. This avoids direct contact with the adhesive surface of the first tape 401 and does not affect subsequent transmission.

[0026] like Figure 2 As shown, in this embodiment, the roller 501 of the roller assembly 5 is elastically telescopically installed in the horizontal direction by the mounting handle 503 and the cylindrical spring 502 located in the mounting handle 503. The mounting handle 503 can be installed adaptably, for example, by using a special motor or other rotating element to rotate, so as to achieve synchronous rotation with the pressure block, and then return independently.

[0027] As one specific implementation structure, as shown in Figure 8, this driving device includes a first transmission wheel 9 and a telescopic rod 11 vertically fixed on its axle 12. The telescopic rod 11 can be a hydraulic rod or an electric actuator, etc. The telescopic rod 11 is coaxially fixedly connected to the transmission column 3. When the first transmission wheel 9 rotates until the telescopic rod 11 is in a vertical position, directly facing the backing adhesive 27 of the diffused light on the lower part of the phone case 28, the first transmission wheel 9 stops rotating, allowing the telescopic rod 11 to extend downwards until the adhesive tape 4 and the backing adhesive 27 of the diffused light are about to be bonded. Figure 1 The adhesive is applied to the surface, and then the first drive wheel 9 continues to rotate. When it reaches a set angle, the backing adhesive 27 of the diffuser light is removed, the hydraulic rod retracts and resets, and the two pressure blocks return to their original positions, flush with the bottom. In practice, the extension time of the hydraulic rod can be directly set. For example, if the hydraulic rod retracts after 3 seconds, then within 3 seconds, it is sufficient for the pressure blocks and the tape 4 to remove the backing adhesive 27 of the diffuser light from the phone case 28. Alternatively, to ensure complete removal, the time can be set longer. This is one of the simpler and more effective methods.

[0028] To better achieve automation and linkage mechanisms, such as Figure 8 The conveyor belt 13 is driven by the second drive wheel 10, which is connected to the first drive wheel 9 so that the telescopic rod 11 carries the drive column 3 forward. Figure 8 When the conveyor belt 13 rotates (to the right), it carries the phone case 28 backward (to the left). Figure 8The left side of the phone case 28 is moved horizontally to peel off the backing adhesive 27 of the diffuser. In addition, an L-shaped positioning block 14 is fixed on the conveyor belt 13. When the conveyor belt 13 is conveying, the positioning block 14 is inserted into the end of the phone case 28 for positioning and installation, and effectively prevents the phone case 28 from moving when the backing adhesive 27 of the diffuser is peeled off.

[0029] To improve versatility, when removing the backing adhesive 27 of the LED backing on the same series of mobile phone cases 28, which has a shorter length (in the width direction of the tape 4 in the diagram), the spacing between the two second tapes 402 needs to be adjusted to be closer together, that is, closer to the two ends of the backing adhesive 27 along its length. This ensures that the roller 501 can press on the tape 4 closer to the two ends of the backing adhesive 27 along its length, thereby improving the tightness of clamping and fixing the tape 4 used for removing the adhesive, and thus improving the reliability of removing the backing adhesive 27. Figure 8 The winding assembly includes several first winding pulley sets 15 and second winding pulley sets 16 located on the right side, such as... Figure 9 On each second winding pulley group 16, two winding pulleys 1601 are coaxially provided to wind and drive the two second rubber belts 402 respectively. The structure for adjusting the spacing between the two winding pulleys 1601 is designed as follows: Two rotating wheels 1601 are coaxially and slidably sleeved onto a core column 17. The core column 17 is rotatably mounted on a frame (not shown in the figure) near its two ends via bearings 18. A screw 19 is coaxially and rotatably mounted inside the core column 17. One end of the screw 19 extends beyond the end of the core column 17 and is fixed with a driven wheel 20 that can be transmitted to a power device. This driven wheel 20 is mainly for direct transmission connection to a motor, etc., when necessary, to achieve conveying and tensioning of the conveyor belt 4. A rectangular strip-shaped sliding hole is provided on the side wall of the core column 17, such as... Figure 10 A threaded sleeve 25 is fixed to the inner wall of the roller 1601 via a slider 24. The slider 24 is slidably installed in the sliding hole, and the threaded sleeve 25 is connected to the screw 19 so that when the screw 19 rotates, the two rollers 1601 move synchronously towards or away from each other to correspond to the different spacing required by the two second adhesive tapes 402, and to the different lengths of light-diffusing adhesive. To fix the two rollers 1601 after adjustment, please refer to [further details]. Figure 9 Near the end of the screw 19, a pressure ring 21 is fixed. A tightening cap 22 is threadedly fitted onto the end of the core column 17. When the tightening cap 22 is tightened onto the end of the core column 17, it axially presses against the pressure ring 21, thus fixing the screw 19 and the core column 17 into one unit. This not only achieves the fixing of the spacing of the winding wheel 1601, but also allows the entire structure to be rotated directly through the driven wheel 20 to transport the conveyor belt. The tightening cap 22 can also be further tightened with a locking screw 23 during tightening to improve its firmness.

[0030] In the above design, in addition to adjusting the spacing between the two second adhesive tapes 402, it can also be used to adjust the spacing between the two opposing roller assemblies 501 to adapt to situations where different widths of diffused light centrifugal adhesive may be removed. During manufacturing, simply place the ends of the two opposing rollers 501 onto the corresponding core post 17 like the winding wheel 1601, that is, the rotating shaft of the end of the roller 501 is vertically placed on the core post 17. The rest of the structure can be manufactured and installed in the same way.

[0031] In practice, the pressure exerted by the inner pressure block 2 on the backing adhesive 27 of the diffuser lamp is more expensive to achieve through processing tolerances. To avoid the inner pressure block 2 damaging the phone case 28 due to poor precision control, especially in the most likely scenario where the inner pressure block 2, with the tape 4 attached to the backing adhesive 27, cannot rotate smoothly forward counterclockwise due to the resistance of the phone case 28, this embodiment addresses this issue by... Figure 12 As shown, the inner pressure block 2 is specially made into a first block 201 and a second block 202 that are elastically connected. The two blocks are elastically connected as one unit by several short tearing springs 26, so that when tearing the backing adhesive 27 of the diffuser lamp, the backing adhesive 27 of the diffuser lamp is squeezed by an elastic variable force. This can effectively prevent the pressure block from getting stuck when rotating forward, because the inner pressure block 2 is actually a flexible element rather than a rigid body, and this tearing method is more in line with its movement trajectory.

[0032] Furthermore, if in actual production there are cases where the width of the adhesive backing 27 for the diffuser lamps is inconsistent, then similarly, roller assemblies 5 can be installed on all four sides, that is, as... Figure 13 A pair of roller assemblies 5 are provided in both the width and length directions of the tape 4, and are matched with the corresponding tape 4 so that the shape and size of the tape part that is used to contact and adhere to the backing adhesive 27 of the diffuser lamp is consistent with the backing adhesive 27 of the diffuser lamp. Compared with the removal of the serialized backing adhesive 27 of the diffuser lamp only in the length direction, the versatility can be further improved, and it is not necessary to frequently replace the tape 4 and the size of the corresponding winding roller 1601.

[0033] It should be clarified here that, in this specification, terms such as "first" and "second" are merely used to distinguish one feature from another, and do not imply any inherent relationship or order between these technical features. The terms "comprising" and "including" mean that something contains one or more technical means or features, specifically referring to other existing or non-existent technical features not listed above. The descriptions in the above embodiments are merely representative examples for the purposes of this invention and are not the only limiting features. Those skilled in the art should understand that, without departing from the technical content described in all claims of this application, simple substitutions and modifications can be made to create different or equivalent specific embodiments and application scenarios. However, regardless of these adaptive changes, all such embodiments must fall within the protection scope of this invention.

Claims

1. A mobile phone face shell assembly light diffusion lamp back adhesive automatic tearing device, characterized in that, The tape winding assembly includes a tape (4) that is stretched and then transported, and a conveying belt (13) for transporting the mobile phone face cover, the conveying direction of the mobile phone is parallel to the horizontal conveying section of the tape (4) and is below the tape (4); The tape winding assembly further includes an outer pressing block (1), an inner pressing block (2), and two roller assemblies (5) below the left and right sides of the inner pressing block (2), the roller assemblies (5) are arranged in the width direction of the tape (4) in the axial direction, the inner pressing block (2) is connected to the bottom end of the outer pressing block (1) by magnetic attraction or elastic force, and the bottoms of the two blocks are flush in the normal state, the transmission column (3) at the top of the inner pressing block (2) vertically penetrates through the top of the outer pressing block (1) and is connected to the driving device; The tape winding assembly further includes a control system, when the mobile phone face cover (28) is transported to the position directly below the horizontal conveying section, the driving device drives the transmission column (3) to move downward, so that the bottom of the inner pressing block slides out of the bottom of the outer pressing block (1), the tape (4) at the corresponding position contacts the roller assembly (5), the tape (4) at the corresponding position is extruded downward between the two roller assemblies (5) to adhere to the astigmatic lamp back adhesive (27) on the mobile phone face cover (28), at this time, the pressing block rotates forward together with the tape (4) and the roller assembly (5) by a set angle, then the driving device drives the transmission column (3) and the inner pressing block (2) to retreat axially to reset, and the roller assembly (5) is reset to the rear to make the astigmatic lamp back adhesive (27) be automatically torn off and transported out together with the tape (4) under the stretching and conveying cooperation of the tape (4).

2. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, The part of the transmission column (3) that penetrates through the outer pressing block (1) is provided with a limiting ring (8), when the limiting ring (8) contacts the top surface of the outer pressing block (1), the inner pressing block (2) with the tape (4) at the corresponding position is pressed on the astigmatic lamp back adhesive (27).

3. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, The tape (4) includes a first tape (401) and two second tapes (402) arranged in parallel in the up-down direction below the outer pressing block (1), the adhesive surface of the first tape (401) faces downward, the adhesive surfaces of the second tapes (402) face upward, the second tapes (402) are narrower than the first tape (401), and the two second tapes (402) are symmetrically arranged on the front and back sides in the width direction of the second tape (402); the roller assembly (5) includes coaxially rotating first and second rollers, the two rollers (501) are respectively used to contact the smooth surfaces of the two second tapes (402) above the two rollers (501) and cannot contact the first tape (401), so that in the process of the transmission column (3) moving downward, the inner pressing block (2) and the outer pressing block (1) move downward synchronously, the first tape (401) is pressed to adhere to the second tape (402), then the second tape (402) contacts the two rollers (501), and the two kinds of tapes after adhesion move downward together to the position of adhering to the astigmatic lamp back adhesive (27) under the extrusion and guidance of the rollers (501).

4. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, The roller (501) of the roller assembly (5) is elastically installed in the horizontal direction through the mounting handle (503) and the cylindrical spring (502) in the mounting handle (503).

5. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, The driving device comprises a first transmission wheel (9) and an extension rod (11) fixed vertically on the wheel shaft (12) of the first transmission wheel (9), and the extension rod (11) is coaxially fixedly connected with the transmission column (3); when the first transmission wheel (9) rotates to the position where the extension rod (11) is in a vertical position, the first transmission wheel (9) is stopped, and then the extension rod (11) is elongated downward to the position where the adhesive tape (4) is bonded with the back adhesive (27) of the astigmatic lamp, and then the first transmission wheel (9) continues to rotate and is retracted by the hydraulic rod when it rotates to a set angle.

6. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 5, characterized in that, The transmission belt (13) is driven by a second transmission wheel (10) which is in driving connection with the first transmission wheel (9), so that when the extension rod (11) rotates forward with the transmission column (3), the transmission belt (13) translates backward with the mobile phone face shell (28) to tear off the back adhesive (27) of the astigmatic lamp.

7. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 6, characterized in that, The transmission belt (13) is fixed with an L-shaped positioning block (14), and the end of the mobile phone face shell (28) is inserted into the positioning block (14) for positioning and installation, and the mobile phone face shell (28) is prevented from moving when the back adhesive (27) of the astigmatic lamp is torn off.

8. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 3, characterized in that, The winding assembly comprises a plurality of first winding wheel groups (15) and second winding wheel groups (16) on the right side, and each second winding wheel group (16) is coaxially provided with two winding wheels (1601) for winding and driving two second adhesive tapes (402) respectively. The two winding wheels (1601) are coaxially and slidingly sleeved on a core column (17), the core column (17) is rotatably installed on the rack through bearings (18) at both ends thereof, the inside of the core column (17) is coaxially and rotatably installed with a screw rod (19), one end of the screw rod (19) extends out of the end of the core column (17) and is fixed with a driven wheel (20) which can be in driving connection with a power device; a slide hole is arranged on the side wall of the core column (17), the inside wall of the winding wheel (1601) is fixed with a threaded sleeve (25) through a sliding block (24), the sliding block (24) is slidingly installed in the slide hole, and the threaded sleeve (25) is in threaded connection with the screw rod (19), so that when the screw rod (19) rotates, the two winding wheels (1601) move synchronously towards or away from each other to correspond to the different distances required by the two second adhesive tapes (402); the screw rod (19) is further fixed with a pressing ring (21) at the end thereof, and the end of the core column (17) is threadedly sleeved with a tightening cover (22), when the tightening cover (22) is screwed on the end of the core column (17), the screw rod (19) and the core column (17) are fixed as a whole by axially pressing the pressing ring (21).

9. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, The inner pressing block (2) comprises a first block body (201) and a second block body (202), and the two block bodies are elastically connected as a whole through a plurality of tearing springs (26), so that when the back adhesive (27) of the astigmatic lamp is torn off, the back adhesive (27) of the astigmatic lamp is pressed through the elastically variable force and the pressing block is prevented from being stuck during forward rotation.

10. The automatic tear-off device for the back adhesive of the scatter light lamp of the mobile phone face shell assembly according to claim 1, characterized in that, A pair of the roller assemblies (5) are arranged in the width and length directions of the adhesive tape (4) respectively, so that the shape and size of the adhesive tape part used for contact and fitting with the back adhesive (27) of the astigmatic lamp are consistent with those of the back adhesive (27) of the astigmatic lamp.

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