Device for testing air tightness of rear cover of mobile phone

Abstract

The utility model discloses a mobile phone rear cover air tightness testing device which comprises a working table, a bottom die is arranged on the working table, a top die is arranged above the bottom die in a matched mode, a testing cavity is formed between the bottom die and the top die in a die closing mode, a ventilation pipe is arranged on the bottom die in a communicated mode, an air tightness detector is connected to the ventilation pipe, and a feeding conveying belt is arranged on one side of the working table. The device further comprises a connecting frame and a mounting frame, the connecting frame is horizontally and movably mounted at the bottom end of the mounting frame, two vacuum suction cups are symmetrically arranged at the bottom end of the connecting frame, vacuum adsorption equipment is connected to the vacuum suction cups, and a lifting driving assembly and a transverse moving assembly are connected to the outer side of the mounting frame. Mounting grooves are formed in the top die and the bottom die, mounting pieces are arranged in the mounting grooves in a sealed and clamped mode, and sealing rings are arranged on the mounting pieces in a matched mode.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone back cover airtightness testing technology, and more specifically, it relates to a mobile phone back cover airtightness testing device. Background Technology

[0002] A mobile phone is a portable communication device that can make voice calls, send text messages, access the internet, take photos, play music and videos, and so on. With the continuous development of technology, modern smartphones have become an indispensable part of people's daily lives, used not only for communication, but also for entertainment, work, study and social interaction.

[0003] During the production and processing of mobile phones, it is necessary to conduct airtightness tests on the installation position of the camera on the back cover of the mobile phone. The traditional testing method is to manually place the back cover of the mobile phone to be tested into the bottom mold and top mold used for testing, so that the bottom mold and top mold are closed and the testing position is sealed to form a sealed test chamber for testing. Then, gas at a certain pressure is filled into the test chamber, the gas source is turned off, and the pressure change in the chamber is monitored and recorded over time. If the pressure drops beyond the set threshold, it indicates that there is a leak.

[0004] However, the current method of testing the airtightness of mobile phone back covers involves manually placing the back cover to be tested inside a clamping fixture, and then manually removing it after the test is completed, and then placing a new back cover for testing. This manual operation is inefficient and has high labor costs. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a mobile phone back cover airtightness testing device, which solves the technical problems mentioned in the background art of low efficiency and high labor cost of manual operation in the prior art of mobile phone back cover airtightness testing devices.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A mobile phone back cover airtightness testing device includes a workbench with a bottom mold and a top mold. The bottom mold and top mold are joined to form a test cavity. A vent pipe is connected to the bottom mold, and an airtightness tester is connected to the vent pipe. A feeding conveyor belt is provided on one side of the workbench, and a discharging conveyor belt is provided on the other side. The device also includes a connecting frame and a mounting frame. The connecting frame is horizontally movable and installed at the bottom of the mounting frame. Two vacuum suction cups are symmetrically arranged at the bottom of the connecting frame, and vacuum adsorption equipment is connected to the vacuum suction cups. A lifting drive assembly and a lateral movement assembly are connected to the outside of the mounting frame. Both the top mold and the bottom mold have mounting grooves, and mounting pieces are sealed and engaged in the mounting grooves. Sealing rings are fitted on the mounting pieces.

[0010] The present invention is further configured such that a locking groove is provided in the mounting groove, a locking post is provided on the mounting piece, the locking post is interference-engaged in the locking groove, and a sealing gasket is provided between the mounting piece and the inner wall of the mounting groove. When the mounting piece is placed in the mounting groove, the locking post engages into the locking groove, thereby achieving stable and detachable installation of the mounting piece in the mounting groove.

[0011] The present invention is further configured such that a first magnetic absorbing piece is provided on the side of the mounting groove near the mounting piece, and a second magnetic absorbing piece is provided on the side of the mounting piece near the inner wall of the mounting groove. The first magnetic absorbing piece and the second magnetic absorbing piece are magnetically attracted to each other. After the mounting piece is installed by the engagement post and engagement groove, the first magnetic absorbing piece and the second magnetic absorbing piece will generate magnetic sound absorption, thereby further enhancing the installation stability of the mounting piece in the mounting groove and strengthening the compression of the sealing gasket, thereby improving the sealing performance between the mounting piece and the inner wall of the mounting groove and improving the accuracy of airtightness testing.

[0012] The present invention is further configured such that a ball screw is provided at the bottom end of the mounting bracket, and a motor is provided in conjunction with the ball screw. A screw nut is provided at the bottom end of the ball screw, and the connecting bracket is installed at the bottom end of the screw nut. When the motor is started, the ball screw is controlled to run, so that the screw nut can move on the ball screw. The movement of the screw nut can control the movement of the connecting bracket, thereby realizing the movement of the vacuum suction cup. This enables automatic loading and unloading of the mobile phone back cover during airtightness testing, and the loading and unloading can be carried out simultaneously, improving testing efficiency.

[0013] The present invention is further configured such that the vacuum adsorption device includes a vacuum pump, the vacuum pump is mounted on a mounting frame, and a vacuum suction hose is provided between the vacuum pump and the vacuum suction cup. The vacuum pump and the vacuum suction hose work together to achieve the vacuuming operation of the vacuum suction cup, thereby enabling the adsorption of the back cover of the mobile phone.

[0014] The present invention is further configured such that the lifting drive assembly includes a fixed base, a lifting base is movably mounted on the fixed base, and the mounting bracket is mounted on the top of the lifting base. The lifting mounting bracket can be installed in a height-adjustable manner through the cooperation of the fixed base and the lifting base.

[0015] The present invention is further configured such that the fixed base is provided with a lifting groove, and an electric push rod is provided in the lifting groove. The lifting base is slidably located in the lifting groove and is connected to the output end of the electric push rod. The lifting base can be adjusted in the lifting groove by the electric push rod, thereby realizing the vacuum suction cup adsorbing the back cover of the mobile phone and adjusting the lifting height when moving.

[0016] The present invention is further configured such that the transverse component includes an electric slide rail, the electric slide rail is disposed at the front end of the worktable, a sliding seat is disposed on the electric slide rail, and a fixed seat is mounted on the sliding seat. By controlling the movement of the sliding seat on the electric slide rail, the movement of the fixed seat and the lifting seat is controlled, thereby controlling the movement of the mounting frame. The movement of the mounting frame controls the movement of the connecting frame, which in turn drives the vacuum suction cup. When the bottom mold and the top mold are closed, the connecting frame carries the vacuum suction cup away from the bottom mold position, thereby facilitating the closure of the bottom mold and the top mold and pressing the back cover of the mobile phone being inspected.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a mobile phone back cover airtightness testing device, which has the following beneficial effects:

[0019] 1. This utility model has a feeding conveyor belt and a discharging conveyor belt on both sides of the workbench. By cooperating with the feeding conveyor belt and the discharging conveyor belt, the back cover to be tested can be fed and the qualified mobile phone back cover can be discharged. In this way, the feeding and discharging of mobile phone back cover can be improved.

[0020] 2. Simultaneously, during testing, this invention allows control of the connecting frame's movement, which in turn moves two sets of vacuum suction cups. One set of vacuum suction cups aligns with and adsorbs the phone back cover being conveyed on the feeding conveyor belt. Then, by controlling the movement of the vacuum suction cups, the vacuum suction cups can move the phone back cover to the bottom mold position and place it in the mold groove of the bottom mold. Afterward, the top mold is controlled to descend and close with the bottom mold, allowing for inflation using an airtightness tester and corresponding air pressure testing to achieve the airtightness test of the phone back cover. After the test is completed, the top mold is controlled to move upward, aligning and adsorbing one set of vacuum suction cups with the phone back cover in the bottom mold, and the other set of vacuum suction cups with the phone back cover on the feeding conveyor belt. Then, the vacuum suction cups move, allowing the phone back cover on the bottom mold to move to the unloading conveyor belt, and the phone back cover on the feeding conveyor belt to move to the bottom mold. This enables automatic feeding and unloading of phone back covers for airtightness testing, improving operational efficiency compared to manual operation.

[0021] 3. In this utility model, mounting grooves are provided on both the bottom mold and the top mold. A sealing ring is installed in the mounting groove through a mounting piece. The sealing ring seals the test port of the phone back cover during airtightness testing, thus forming a sealed chamber during testing. Simultaneously, the mounting piece is installed in the mounting groove through the cooperation of a locking post and a locking groove. This facilitates the installation and removal of the sealing ring on the top and bottom molds, making it easy to replace the sealing ring. Furthermore, a sealing gasket is provided between the mounting piece and the mounting groove, which enhances the sealing performance of the mounting piece during installation and improves testing accuracy. Additionally, the first and second magnetic suction pieces magnetically connect the mounting piece to the inner wall of the mounting groove, enhancing the installation stability of the sealing ring at the mounting groove position. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a mobile phone back cover airtightness testing device according to the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of a mobile phone back cover airtightness testing device according to the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the installation structure of the vacuum suction cup in this utility model;

[0025] Figure 4 This is an exploded cross-sectional view of the mating structure of the bottom mold, top mold, and back cover of the mobile phone in this utility model.

[0026] Figure 5 This is an exploded cross-sectional view of the installation structure of the sealing gasket in this utility model;

[0027] Figure 6 This is a cross-sectional schematic diagram of the connection structure between the fixed seat and the lifting seat in this utility model.

[0028] In the diagram: 1. Workbench; 2. Bottom mold; 3. Top mold; 4. Test chamber; 5. Vent pipe; 6. Feeding conveyor belt; 7. Discharging conveyor belt; 8. Connecting frame; 9. Mounting frame; 10. Vacuum suction cup; 11. Vacuum adsorption equipment; 12. Mounting groove; 13. Mounting plate; 14. Sealing ring; 15. Engaging groove; 16. Engaging column; 17. Sealing gasket; 18. First magnetic suction plate; 19. Second magnetic suction plate; 20. Ball screw; 21. Motor; 22. Screw nut; 23. Vacuum pump; 24. Vacuum suction hose; 25. Fixed seat; 26. Lifting seat; 27. Lifting groove; 28. Electric push rod; 29. ​​Electric slide rail; 30. Sliding seat. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0032] Please see Figures 1-6 A mobile phone back cover air tightness testing device includes a workbench 1, a bottom mold 2 is provided on the workbench 1, and a top mold 3 is provided above the bottom mold 2. The top mold 3 is installed above the bottom mold 2 in a liftable manner. The lifting drive of the top mold 3 is a known existing structure, which will not be described in detail in this utility model.

[0033] A test cavity 4 is formed by closing the bottom mold 2 and the top mold 3. A vent pipe 5 is connected to the bottom mold 2, and an air tightness tester is connected to the vent pipe 5.

[0034] The specific principle and steps of the airtightness test of the back cover of the mobile phone case by the combination of the bottom mold 2 and the top mold 3 have been explained in the background art and are existing technology. Therefore, this utility model will not repeat them here.

[0035] This utility model has a feeding conveyor belt 6 on one side of the workbench 1 and a discharging conveyor belt 7 on the other side;

[0036] By using the loading conveyor belt 6 and the unloading conveyor belt 7 together, the back covers to be inspected can be loaded and the qualified mobile phone back covers can be unloaded. This improves the convenience of loading and unloading during the inspection of mobile phone back covers.

[0037] This utility model also includes a connecting frame 8 and a mounting frame 9. The connecting frame 8 is horizontally movably mounted at the bottom end of the mounting frame 9. Two vacuum suction cups 10 are symmetrically arranged at the bottom end of the connecting frame 8. A vacuum adsorption device 11 is connected to the vacuum suction cups 10. A lifting drive assembly and a transverse movement assembly are connected to the outside of the mounting frame 9.

[0038] The mounting frame 9 has a ball screw 20 at its bottom and a motor 21 that works in conjunction with the ball screw 20. A screw nut 22 is located at the bottom of the ball screw 20. A connecting frame 8 is installed at the bottom of the screw nut 22. When the motor 21 is started, it controls the operation of the ball screw 20, allowing the screw nut 22 to move on the ball screw 20. The movement of the screw nut 22 controls the movement of the connecting frame 8, thereby enabling the movement of the vacuum suction cup 10. This allows for automatic loading and unloading of the phone back cover during airtightness testing, with loading and unloading occurring simultaneously to improve testing efficiency.

[0039] Specifically, the lifting drive assembly includes a fixed base 25, a lifting base 26 is movably mounted on the fixed base 25, and a mounting bracket 9 is mounted on the top of the lifting base 26. The lifting mounting bracket 8 can be installed in a height-adjustable manner through the cooperation of the fixed base 25 and the lifting base 26.

[0040] Furthermore, a lifting groove 27 is provided on the fixed base 25, and an electric push rod 28 is provided in the lifting groove 27. The lifting seat 26 is slidably located in the lifting groove 27 and connected to the output end of the electric push rod 28. The lifting seat 26 can be adjusted in the lifting groove 27 by the electric push rod 28, thereby realizing the vacuum suction cup 10 adsorbing the back cover of the mobile phone and adjusting its lifting position when moving.

[0041] During adsorption, the vacuum suction cup 10 is controlled to descend; during movement, the vacuum suction cup 10 is controlled to rise.

[0042] Specifically, the transverse component includes an electric slide rail 29, which is located at the front end of the worktable 1. A sliding seat 30 is provided on the electric slide rail 29, and a fixed seat 25 is installed on the sliding seat 30. By controlling the movement of the sliding seat 30 on the electric slide rail 29, the movement of the fixed seat 25 and the lifting seat 26 is controlled, thereby controlling the movement of the mounting frame 9. The movement of the mounting frame 9 controls the movement of the connecting frame 8, which in turn drives the vacuum suction cup 10. When the bottom mold 2 and the top mold 3 are closed, the connecting frame 8 carries the vacuum suction cup 10 away from the bottom mold 2, thus facilitating the closure of the bottom mold 2 and the top mold 3 and pressing the back cover of the mobile phone being tested.

[0043] This utility model has mounting grooves 12 on both the top mold 3 and the bottom mold 2. Mounting pieces 13 are sealed and engaged in the mounting grooves 12, and sealing rings 14 are provided on the mounting pieces 13.

[0044] The mounting groove 12 is provided with a locking groove 15, the mounting piece 13 is provided with a locking post 16, the locking post 16 is interference-fitted into the locking groove 15, and a sealing gasket 17 is provided between the mounting piece 13 and the inner wall of the mounting groove 12.

[0045] During installation, when the mounting piece 13 is placed in the mounting groove 12, the engaging post 16 engages into the engaging groove 15, thereby achieving stable and detachable installation of the mounting piece 13 in the mounting groove 12. The sealing gasket 17 is located between the mounting piece 13 and the inner wall of the mounting groove 12, and is used for connection sealing between the mounting piece 13 and the inner wall of the mounting groove 12.

[0046] Furthermore, this invention provides a first magnetic suction piece 18 on the side of the mounting groove 12 near the mounting piece 13, and a second magnetic suction piece 19 on the side of the mounting piece 13 near the inner wall of the mounting groove 12. The first magnetic suction piece 18 and the second magnetic suction piece 19 are magnetically attracted to each other. After the mounting piece 13 is installed through the engagement post 16 and the engagement groove 15, the first magnetic suction piece 18 and the second magnetic suction piece 19 will generate magnetic sound absorption, which can further enhance the installation stability of the mounting piece 13 in the mounting groove 12, and at the same time strengthen the compression of the sealing gasket 17, thereby improving the sealing performance between the mounting piece 13 and the inner wall of the mounting groove 12, and improving the accuracy of airtightness testing.

[0047] Please see Figures 1-6 As one embodiment of the vacuum adsorption device 11: the vacuum adsorption device 11 includes a vacuum pump 23, which is mounted on the mounting frame 9, and a vacuum suction hose 24 is provided between the vacuum pump 23 and the vacuum suction cup 10. The vacuum suction cup 10 can be vacuumed by the cooperation of the vacuum pump 23 and the vacuum suction hose 24, so that the back cover of the mobile phone can be adsorbed by the vacuum suction cup 10.

[0048] In summary:

[0049] In use, the feeding conveyor belt 6 and the unloading conveyor belt 7 work together to feed the back cover to be tested and to unload the qualified mobile phone back cover after testing. This improves the convenience of feeding and unloading during the testing of mobile phone back covers and the smoothness of the operation.

[0050] During testing, this invention allows for the control of the connecting frame 8 to move, thereby moving two sets of vacuum suction cups 10. One set of vacuum suction cups 10 descends to align with and adsorb the mobile phone back cover conveyed on the feeding conveyor belt 6. Then, by controlling the vacuum suction cups 10 to rise and move, the vacuum suction cups 10 can move the mobile phone back cover to the bottom mold 2 position and place it in the mold groove of the bottom mold 2. Afterward, the top mold 3 is controlled to descend and close with the bottom mold 2. In this way, the air tightness is tested by an air tightness tester to inflate the back cover and perform corresponding air pressure tests, thereby achieving the air tightness test of the mobile phone back cover.

[0051] After the test is completed, the top mold 3 is moved upward so that a set of vacuum suction cups 10 aligns with and adsorbs the back cover of the mobile phone in the bottom mold 2, and another set of vacuum suction cups 10 aligns with and adsorbs the back cover of the mobile phone on the feeding conveyor belt 6. Then, the vacuum suction cups 10 move so that the back cover of the mobile phone on the bottom mold 2 can be moved to the unloading conveyor belt 7, and the back cover of the mobile phone on the feeding conveyor belt 6 can be moved to the bottom mold 2. In this way, the automatic feeding and unloading of the back cover of the mobile phone can be realized during the airtightness test, and the feeding and unloading can be carried out simultaneously, which improves the operating efficiency compared with manual operation.

[0052] In this invention, mounting grooves 12 are provided on both the bottom mold 2 and the top mold 3. A sealing ring 14 is installed in the mounting groove 12 through a mounting piece 13. The sealing ring 14 seals the test port of the mobile phone back cover during airtightness testing, thus forming a sealed chamber during testing. At the same time, the mounting piece 13 is installed in the mounting groove 12 through the cooperation of the engaging post 16 and the engaging groove 15. This facilitates the installation and removal of the sealing ring 14 on the top mold 3 and the bottom mold 2, thereby facilitating the replacement of the sealing ring 14. In addition, a sealing gasket 17 is provided between the mounting piece 13 and the mounting groove 12. This enhances the sealing performance of the mounting piece 13 during installation and improves the accuracy of testing. Furthermore, the mounting piece 13 is magnetically connected to the inner wall of the mounting groove 12 through the cooperation of the first magnetic piece 18 and the second magnetic piece 19. This enhances the installation stability of the sealing ring 14 at the position of the mounting groove 12.

[0053] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0054] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.

[0055] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and this utility model will not elaborate on them.

[0056] Of all the solutions mentioned above, those involving the connection between solar panels and batteries can be equipped with essential accessories such as inverters, battery charging controllers, cables, fuses, and brackets. Their control principles and circuit connections are all existing, well-known, and mature technologies, so their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A mobile phone back cover airtightness testing device, comprising a workbench (1), a bottom mold (2) disposed on the workbench (1), a top mold (3) disposed above the bottom mold (2), a test cavity (4) formed by the bottom mold (2) and the top mold (3) being joined together, a vent pipe (5) being disposed on the bottom mold (2), and an airtightness tester being connected to the vent pipe (5), characterized in that: The workbench (1) is provided with a feeding conveyor belt (6) on one side and a discharging conveyor belt (7) on the other side; It also includes a connecting frame (8) and a mounting frame (9). The connecting frame (8) is horizontally mounted on the bottom end of the mounting frame (9). Two vacuum suction cups (10) are symmetrically arranged at the bottom end of the connecting frame (8). A vacuum adsorption device (11) is connected to the vacuum suction cup (10). A lifting drive assembly and a lateral movement assembly are connected to the outside of the mounting frame (9). Mounting grooves (12) are opened on both the top mold (3) and the bottom mold (2). Mounting pieces (13) are sealed and engaged in the mounting grooves (12). Sealing rings (14) are fitted on the mounting pieces (13).

2. The mobile phone back cover airtightness testing device according to claim 1, characterized in that: The mounting groove (12) is provided with a locking groove (15), and the mounting piece (13) is provided with a locking post (16). The locking post (16) is interference-fitted into the locking groove (15), and a sealing gasket (17) is provided between the mounting piece (13) and the inner wall of the mounting groove (12).

3. The mobile phone back cover airtightness testing device according to claim 2, characterized in that: The mounting groove (12) is provided with a first magnetic absorbing piece (18) on the side near the mounting piece (13), and the mounting piece (13) is provided with a second magnetic absorbing piece (19) on the side near the inner wall of the mounting groove (12). The first magnetic absorbing piece (18) and the second magnetic absorbing piece (19) are magnetically attracted to each other.

4. The mobile phone back cover airtightness testing device according to claim 1, characterized in that: The mounting bracket (9) is provided with a ball screw (20) at its bottom end, and a motor (21) is provided in conjunction with the ball screw (20). The ball screw (20) is provided with a screw nut (22) at its bottom end, and the connecting bracket (8) is installed at the bottom end of the screw nut (22).

5. The mobile phone back cover airtightness testing device according to claim 1, characterized in that: The vacuum adsorption device (11) includes a vacuum pump (23), which is mounted on a mounting frame (9), and a vacuum suction hose (24) is provided between the vacuum pump (23) and the vacuum suction cup (10).

6. A mobile phone back cover airtightness testing device according to any one of claims 1-5, characterized in that: The lifting drive assembly includes a fixed base (25), on which a lifting base (26) is mounted (liftable), and the mounting bracket (9) is located at the top of the lifting base (26).

7. The mobile phone back cover airtightness testing device according to claim 6, characterized in that: The fixed base (25) is provided with a lifting groove (27), and an electric push rod (28) is provided in the lifting groove (27). The lifting base (26) is slidably located in the lifting groove (27) and connected to the output end of the electric push rod (28).

8. The mobile phone back cover airtightness testing device according to claim 7, characterized in that: The transverse component includes an electric slide rail (29), which is located at the front end of the worktable (1). A sliding seat (30) is provided on the electric slide rail (29), and a fixed seat (25) is installed on the sliding seat (30).

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