Mobile phone back cover horizontal gradient processing jig

Abstract

The utility model discloses a kind of mobile phone back cover horizontal gradual change processing fixture, it is related to mobile phone back cover production technical field, including placing tray assembly, by multiple placing tray combination of inner concave sector shape constitutes an integral inner concave circular structure, rotating frame, the middle part of rotating frame is equipped with connecting portion, the outer periphery of connecting portion is equipped with the frame body compatible with the shape of placing tray, the inner side of frame body is equipped with the flange for supporting placing tray, multiple placing piece fixed in the inner concave bottom surface of each placing tray by several magnet adsorption, placing piece is equipped with multiple adhesion station for adhering mobile phone back cover, at least one fixed rod, fixed rod is rigidly connected with the bottom surface both ends of placing tray by the fixed portion of its top surface both ends, the bottom surface of fixed rod is equipped with multiple installation holes arranged at intervals, mask plate, by locking piece detachably mounted on the installation hole of fixed rod, the utility model can change the gradual change effect of mobile phone back cover in gradual change processing, significantly improve the appearance aesthetic feeling of product.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone back cover manufacturing technology, and in particular to a mobile phone back cover horizontal gradient processing fixture. Background Technology

[0002] With the rapid popularization of consumer electronics, especially smartphones, product appearance design has become a key factor in enhancing market competitiveness. In recent years, physical vapor deposition (PVD) processes, particularly magnetron sputtering, have become a mainstream high-end appearance treatment solution for preparing gradient color films on mobile phone back covers. This technology deposits a transparent film of a specific thickness on the substrate surface, utilizes the interference effect of light to produce brilliant colors, and achieves continuous color changes by precisely controlling the film thickness gradient, giving the product appearance a dynamic and aesthetically pleasing feel, and meeting the market demand for high-end and personalized appearance designs.

[0003] In existing magnetron sputtering gradient coating technologies, a rotating jig is commonly used. This jig typically includes a rotating frame that can be driven by the rotation axis of the magnetron sputtering gradient equipment and can rotate multiple placement trays. The workpiece (such as a mobile phone back cover) is fixed on the placement trays. By placing a mask of a specific shape between the workpiece and the target material, and coating the surface of the mask with a tin film layer, the "shadowing effect" is used to control the film thickness distribution, thereby forming a gradient color.

[0004] However, existing fixtures of this type have the following obvious drawbacks. First, the gradient direction is singular, limiting design freedom. Traditional photomasks are usually fixed to the inner wall of the vacuum chamber or a specific position below the placement tray, and the resulting gradient effect is mostly limited to a vertical gradient from the top to the bottom or from the bottom to the top of the phone's back cover. This single gradient direction is difficult to meet the market's growing demand for diversified and personalized appearance designs, and cannot achieve more aesthetically pleasing and dynamic gradient effects such as horizontal, diagonal, or specific curves.

[0005] Secondly, the mask is inconvenient to adjust and has poor production flexibility. If the gradient direction or pattern needs to be changed, the entire mask assembly needs to be replaced or its fixed position in the cavity needs to be adjusted. The operation is cumbersome and time-consuming, which seriously affects production efficiency and changeover speed, and cannot meet the flexible production needs of small batches and multiple varieties.

[0006] In view of this, the inventor conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Utility Model Content

[0007] This utility model provides a processing fixture for horizontal gradient of mobile phone back cover, aiming to solve the problems of single gradient direction and inconvenient mask adjustment in the technology.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A fixture for processing horizontal gradients on mobile phone back covers, comprising:

[0010] The placement tray assembly consists of multiple concave fan-shaped placement trays combined to form an integral concave circular structure.

[0011] The rotating frame has a connecting part in the middle for connecting to the main rotating shaft. A frame body adapted to the shape of the placement tray is provided around the outer periphery of the connecting part. The inner side of the frame body has an inwardly extending protruding edge for supporting the placement tray. The radial side of the placement tray has at least one positioning hole. The frame body has an elastic positioning pin that cooperates with the positioning hole. When the placement tray is placed in the frame body, the elastic positioning pin is inserted into the positioning hole.

[0012] Multiple placement pieces are attached to the concave bottom surface of each of the aforementioned placement trays by several magnets. The placement pieces are provided with multiple adhesion stations for attaching the back cover of a mobile phone, and the surface of the back cover to be processed faces downwards.

[0013] At least one fixing rod, which is rigidly connected to the bottom ends of the placement plate through fixing parts at both ends of its top surface, and the bottom surface of the fixing rod is provided with a plurality of mounting holes arranged at intervals along its length.

[0014] The mask plate is detachably mounted on the mounting hole of the fixing rod by means of fasteners and suspended below the placement plate. The extension direction of the mask plate forms a non-zero angle with the rotation direction of the placement plate.

[0015] Furthermore, the mask plate can be semi-circular, wavy, or crescent-shaped.

[0016] Furthermore, the aforementioned placement tray has a pair of radial sides provided with the aforementioned positioning holes, and the aforementioned frame is provided with corresponding elastic positioning pins.

[0017] Furthermore, the frame is provided with a positioning groove, and the elastic positioning pin is accommodated in the positioning groove; the elastic positioning pin includes a pin body, a spring and an anti-disengagement part, the spring acts on the pin body so that it can pop out in the direction of the positioning hole, and the anti-disengagement part is used to prevent the pin body from disengaging from the positioning groove.

[0018] Furthermore, the mounting hole of the aforementioned fixing rod is a threaded hole, the aforementioned locking device is a first screw, and the aforementioned mask plate is provided with an elongated hole that mates with the aforementioned first screw.

[0019] Furthermore, a fixing hole is provided at one end of the placement plate near the connecting part, and a second screw for locking the placement plate to the rotating frame is inserted in the fixing hole.

[0020] Furthermore, the adhesion station on the aforementioned placement piece secures the phone back cover with adhesive.

[0021] Furthermore, the aforementioned magnets are high-temperature resistant samarium cobalt magnets or neodymium iron boron magnets.

[0022] Furthermore, the aforementioned connection part is a flange structure, which is fixedly connected to the flange at the end of the aforementioned main rotating shaft by bolts.

[0023] As can be seen from the above description of the structure of this utility model, this utility model has the following advantages:

[0024] This invention significantly improves the flexibility and gradient effect of gradient processing for mobile phone back covers by improving the design of the rotating frame, placement tray assembly, and mask. The rotating frame design ensures that the placement tray assembly rotates smoothly under the drive of the main rotating shaft of the magnetron sputtering equipment, thereby rotating the placement tray. Simultaneously, by setting multiple placement plates on the placement tray and using magnets to fix the mobile phone back cover, the stability of the workpiece during processing is ensured. Furthermore, due to the non-zero angle formed by the rotation direction of the mask and the placement tray, a lateral or specific curved gradient effect can be generated during magnetron sputtering, providing greater freedom and aesthetic appeal for product design. In addition, the mask's easy disassembly and adjustment allows users to conveniently change the gradient direction and pattern according to their needs, greatly improving production efficiency and flexibility. This adapts to the flexible production needs of small-batch, multi-variety production, avoiding the cumbersome mask replacement and adjustment operations of traditional methods, and further optimizing the production process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of the flexible locating pin and locating groove.

[0027] Figure 3 This is a schematic diagram of the structure of a flexible locating pin.

[0028] Figure 4 This is a schematic diagram of the structure of the placement piece of this utility model on the placement tray.

[0029] Figure 5 This is a schematic diagram of the rotating frame of this utility model after the placement tray has been removed.

[0030] Reference numerals: 10-Placement tray; 11-Positioning hole; 12-Fixing hole; 121-Second screw; 20-Rotating frame; 201-Positioning groove; 21-Connecting part; 22-Protruding edge; 221-Connecting hole; 23-Elastic positioning pin; 231-Pin body; 232-Spring; 233-Anti-detachment part; 30-Placement piece; 31-Adhesion station; 40-Magnet; 50-Fixing rod; 51-Fixing part; 52-Mounting hole; 60-Mask plate; 61-First screw. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0032] Reference Figures 1 to 5 A mobile phone back cover horizontal gradient processing fixture includes a placement tray assembly, which is composed of multiple concave fan-shaped placement trays 10 forming an integral concave circular structure; a rotating frame 20, the central part of which is provided with a connecting part 21 for connecting with the main rotating shaft of a magnetron sputtering device, and a frame body around the outer periphery of the connecting part 21 that is adapted to the shape of the placement tray 10. The inner side of the frame body is provided with an inwardly extending protruding edge 22 for supporting the placement tray 10; at least one positioning hole 11 is provided on the radial side of the placement tray 10, and an elastic positioning pin 23 is provided on the frame body to cooperate with the positioning hole 11. When the placement tray 10 is placed in the frame body, the elastic positioning pin 23 is inserted into the positioning hole 11 to achieve positioning of the placement tray 10. In this embodiment, both the placement tray 10 and the rotating frame 20 are made of metal.

[0033] Reference Figures 1 to 5 Multiple placement pieces 30 are attached to the concave bottom surface of each placement tray 10 by several magnets 40. The placement pieces 30 are provided with multiple adhesion stations 31 for adhering the back cover of the mobile phone, and the surface to be processed of the back cover of the mobile phone faces downward. At least one fixing rod 50 is rigidly connected to the two ends of the bottom surface of the placement tray 10 through fixing parts 51 at both ends of its top surface. In this embodiment, the fixing parts 51 can be welded to the two ends of the bottom surface of the placement tray 10. The bottom surface of the fixing rod 50 is provided with multiple mounting holes 52 arranged at intervals along its length. A mask plate 60 is detachably installed on the mounting holes 52 of the fixing rod 50 by fasteners and suspended below the placement pieces 30. In this embodiment, the shape of the mask plate 60 is semi-arc, wavy, or crescent-shaped, preferably semi-arc, and the extension direction of the mask plate 60 forms a non-zero angle with the rotation direction of the placement tray 10, which is used to generate a gradient color of lateral or non-linear curves on the back cover of the mobile phone in the magnetron sputtering process.

[0034] With this setup, during gradient processing, the rotating frame 20 can rotate under the drive of the main rotating shaft, simultaneously rotating each placement tray 10. The phone back cover to be processed is adhered to the placement plate 30 and rotates along with the placement tray 10. Due to the unique shape of the mask 60 and the non-zero angle between it and the rotation direction of the placement tray 10, the mask 60 will produce a special "shadow effect" on the film thickness distribution deposited on the phone back cover during magnetron sputtering. This effect makes the film thickness on the surface of the phone back cover exhibit a gradient distribution that changes laterally or according to a specific curve, thereby achieving a gradient color effect. In addition, when it is necessary to change the direction or pattern of the gradient, simply loosen the fastener on the fixing rod 50, and then replace the mask 60 with a mask of different shapes or adjust the position of the mask 60 on the mounting hole 52 of the fixing rod 50 as needed. The operation is simple and convenient, greatly improving production efficiency and equipment flexibility, and can well adapt to the flexible production mode of small batches and multiple varieties.

[0035] Reference Figures 1 to 5 The placement tray 10 has a pair of radial side locating holes 11, and the frame has corresponding elastic locating pins 23. The frame has a locating groove 201, and the elastic locating pin 23 is housed in the locating groove 201. The elastic locating pin 23 includes a pin body 231, a spring 232, and an anti-detachment part 233. The spring 232 acts on the pin body 231, allowing it to pop out towards the locating hole 11. The anti-detachment part 233 is used to prevent the pin body 231 from falling out of the locating groove 201. With this design, during installation, the elastic locating pin 23 can automatically pop out and insert into the locating hole 11 of the placement tray 10 under the action of the spring 232, ensuring that the placement tray 10 is fixed and accurately positioned in the frame. This not only simplifies the installation steps but also improves the connection stability between the placement tray 10 and the rotating frame 20, preventing loosening or displacement during rotation. In addition, the design of the anti-detachment part 233 effectively prevents the elastic locating pin 23 from accidentally falling out due to external force, further enhancing the reliability of the overall structure.

[0036] Reference Figures 1 to 5 In this embodiment, the mounting hole 52 of the fixing rod 50 is a threaded hole, and the locking fastener is a first screw 61. The mask plate 60 is provided with an elongated hole (not shown in the figure) that mates with the first screw 61. In application, the first screw 61 is inserted through the elongated hole of the mask plate 60 and tightened into the mounting hole 52 of the fixing rod 20 to install the mask plate 60. With this design, the mask plate 60 can be flexibly adjusted on the fixing rod 50 and quickly fixed by the first screw 61. The setting of the elongated hole allows the installation angle and height of the mask plate 60 to be finely adjusted according to actual needs, thereby meeting the processing requirements of different gradient effects and significantly improving the adaptability during processing.

[0037] Reference Figures 1 to 5 The placement tray 10 has a fixing hole 12 at one end near the connecting part 21. The rotating frame 20 has a connecting hole 221 corresponding to the fixing hole 52 on its protruding edge 22 near the connecting part 21. The placement tray 10 and the rotating frame 20 can be locked together by locking the second screw 121 in the fixing hole 52 and the connecting hole 221. This arrangement can improve the connection stability between the placement tray 10 and the rotating frame 20 and ensure that there will be no loosening or separation during operation.

[0038] In this embodiment, both the first screw 61 and the second screw 121 are fastened with nuts, preferably spring nuts, to prevent the nuts from falling off.

[0039] Reference Figures 1 to 5 The adhesion station 31 on the placement piece 30 fixes the phone back cover with an adhesive. This adhesive is preferably made of a high-temperature resistant material. In one preferred embodiment, the adhesive is a heat-peelable, thermally conductive silicone pressure-sensitive tape. At room temperature, this tape provides sufficient adhesion to resist centrifugal force caused by rotation. After processing, by moderately heating the fixture or workpiece (e.g., to above 60°C), the tape's tackiness significantly decreases, allowing for easy and residue-free peeling of the phone back cover. In another embodiment, the adhesive is a peelable silicone gel. It is applied to the adhesion station by dispensing and, after curing, forms an elastic adhesive layer, allowing the workpiece to be removed by mechanical peeling. In yet another embodiment, the adhesive is a special acrylic foam double-sided tape, which has high initial tack and is easy to peel off from the interface. By using this adhesive to fix the phone back cover, the phone back cover remains stable during processing and can be quickly removed after processing. In addition, the magnet 40 in this embodiment is a high-temperature resistant samarium cobalt magnet or neodymium iron boron magnet, which can maintain stable adsorption performance in high-temperature environments, ensuring that the placement plate 30 is firmly fixed on the concave bottom surface of the placement tray 10, and ensuring the normal operation of the equipment even under high-temperature processing conditions.

[0040] Reference Figure 1 In this embodiment, the connecting part 21 is a flange structure, which is fixedly connected to the flange at the end of the main rotating shaft of the magnetron sputtering equipment by bolts. Since this is a conventional technical means, it will not be described in detail here.

[0041] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A machining fixture for horizontal gradient processing of mobile phone back covers, characterized in that, include: The placement tray assembly consists of multiple concave fan-shaped placement trays combined to form an integral concave circular structure. A rotating frame has a connecting part in the middle for connecting to the main rotating shaft. A frame body adapted to the shape of the placement tray is provided around the outer periphery of the connecting part. The inner side of the frame body has an inwardly extending protruding edge for supporting the placement tray. The radial side of the placement tray has at least one positioning hole. The frame body has an elastic positioning pin that cooperates with the positioning hole. When the placement tray is placed in the frame body, the elastic positioning pin is inserted into the positioning hole. Multiple placement pieces are attached to the concave bottom surface of each placement tray by several magnets. The placement pieces are provided with multiple adhesion stations for adhering the back cover of the mobile phone, and the processing surface of the back cover of the mobile phone faces downward. At least one fixing rod, the fixing rod being rigidly connected to the bottom ends of the placement plate via fixing parts at both ends of its top surface, and the bottom surface of the fixing rod having a plurality of mounting holes spaced apart along its length; The mask plate is detachably mounted on the mounting hole of the fixing rod by fasteners and suspended below the placement plate. The extending direction of the mask plate forms a non-zero angle with the rotation direction of the placement disk.

2. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The mask plate is in the shape of a semi-circular, wavy, or crescent shape.

3. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The placement tray has a pair of radial sides with positioning holes, and the frame has corresponding elastic positioning pins that cooperate with them.

4. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The frame is provided with a positioning groove, and the elastic positioning pin is accommodated in the positioning groove; the elastic positioning pin includes a pin body, a spring and an anti-disengagement part, the spring acts on the pin body to make it pop out in the direction of the positioning hole, and the anti-disengagement part is used to prevent the pin body from falling out of the positioning groove.

5. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The mounting hole of the fixing rod is a threaded hole, the locking device is a first screw, and the mask plate is provided with an elongated hole that mates with the first screw.

6. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: A fixing hole is provided at one end of the placement tray near the connecting part, and a second screw for locking the placement tray to the rotating frame is inserted in the fixing hole.

7. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The adhesion station on the placement piece secures the phone back cover with adhesive.

8. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The magnet is a high-temperature resistant samarium cobalt magnet or neodymium iron boron magnet.

9. The mobile phone back cover transverse gradient processing fixture according to claim 1, characterized in that: The connecting part is a flange structure, which is fixedly connected to the flange at the end of the main rotating shaft by bolts.

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