An oil immersion device for a surface acoustic wave filter

Abstract

The utility model provides a kind of oil immersion device of acoustic surface filter, including rack, be equipped with soaking groove, cleaning tank and drying groove on the rack, be equipped with lid mechanism for respectively opening and closing the soaking groove, the cleaning tank and the drying groove on the rack;The opening outer edge of the soaking groove is equipped with pressing plate, first drive machine is equipped on the rack to drive the pressing plate away from or close to the soaking groove opening outer edge, the soaking groove is respectively connected with vacuum pump and oil storage container, heating mechanism is equipped on the oil storage container;The drying groove is connected with exhaust fan.Compared with prior art, the utility model has the advantages of simple structure, convenient operation, high working efficiency and high oil immersion success rate, can effectively improve detection efficiency, reduce the workload of artificial, ensure higher detection accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of surface acoustic wave (SAW) filter quality inspection, and in particular to an oil immersion device for SAW filters. Background Technology

[0002] Surface acoustic wave (SAW) filters are microwave frequency selective devices used in signal processing and communication. They have advantages such as small size, high operating frequency, low insertion loss, excellent frequency selectivity, and low production cost, and are widely used in various electronic devices, such as mobile phones.

[0003] With the continuous development of the communications industry, its applications are becoming increasingly sophisticated. Filters, as crucial electronic components, face not only stringent requirements for electrical performance but also for reliability. The sealing performance of electronic components significantly impacts product reliability; sufficient sealing is essential to resist corrosion from various external environments and ensure proper internal operation.

[0004] Currently, the sealing performance of surface acoustic wave (SAW) filters is typically tested by immersing them in fluorinated oil and then visually observing the bubbles that emerge to determine the product's sealing condition. However, visually observing small bubbles can easily lead to misjudgments, is inefficient, and causes eye fatigue. Furthermore, when the pores of a damaged SAW filter are small, direct immersion in fluorinated oil may not produce bubbles, making it even more difficult for the human eye to determine whether the filter is damaged and whether fluorinated oil has seeped in. Therefore, there is an urgent need to solve these problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an oil-immersion device for surface acoustic wave (SAW) filters. This device has the advantages of simple structure, convenient operation, high working efficiency, and high success rate of oil immersion, which can effectively improve detection efficiency, reduce manual workload, and ensure high detection accuracy.

[0006] The present invention achieves the above objectives through the following technical solution: an oil immersion device for a surface acoustic wave filter, comprising a frame, wherein the frame is provided with an immersion tank, a cleaning tank and a drying tank, and the frame is provided with a cover mechanism for opening and closing the immersion tank, the cleaning tank and the drying tank respectively.

[0007] The soaking tank is provided with a pressure plate at the outer edge of the opening, and the frame is provided with a first drive motor that drives the pressure plate away from or close to the outer edge of the opening of the soaking tank. The soaking tank is connected to a vacuum pump and an oil storage container, and the oil storage container is provided with a heating mechanism.

[0008] The drying tank is connected to an exhaust fan.

[0009] Furthermore, the frame is equipped with a material transfer mechanism, which includes a first bracket fixed to the frame. A first linear motor is mounted horizontally on the first bracket. The soaking tank, the washing tank, and the drying tank are arranged along the direction of motion of the first linear motor. A second linear motor is mounted on the output end of the first linear motor, which is arranged vertically. A mechanical gripper is mounted on the output end of the second linear motor. This enables automatic material transfer without manual operation, reducing human intervention and improving work efficiency.

[0010] Furthermore, one end of the material transfer mechanism is equipped with a feeding mechanism, which includes a second support fixed to the frame. A first conveyor is mounted on the second support, and a cylinder for holding the surface acoustic wave (SAW) filter is mounted on the first conveyor. This enables automatic feeding without manual operation, reducing human intervention and improving work efficiency.

[0011] Furthermore, the barrel is provided with several filter holes. This allows excess liquid to be drained, leaving the workpiece inside the barrel.

[0012] Furthermore, the other end of the material transfer mechanism is provided with a feeding mechanism, which includes a third support fixed to the frame, and a second conveyor is mounted on the third support. This enables automatic feeding without manual operation, reducing human intervention, improving work efficiency, and achieving a high degree of automation.

[0013] Furthermore, the cleaning tank is connected to a vibrator. This improves the cleaning effect, effectively removing fluorinated oil from the workpiece surface and increasing the accuracy of testing.

[0014] Furthermore, the closing mechanism includes a second drive motor and a cover plate, the cover plate being connected to the output end of the second drive motor, which drives the cover plate to reciprocate. This automatically opens or closes the corresponding slot, preventing liquid splashing.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the immersion tank can be opened or closed by the lid-closing mechanism, and the pressure plate can be pressed down by the first drive motor to form a relatively sealed cavity in the immersion tank. Then, the vacuum pump is used to evacuate the tank, allowing the fluorinated oil to penetrate into the damaged pores of the surface acoustic wave filter (SAW filter), even if the pores are small, without the need for manual judgment, thereby improving detection efficiency and ensuring the success rate of oil immersion. Furthermore, the cleaning tank can clean the fluorinated oil on the surface of the SAW filter, thereby improving the accuracy of detection. The exhaust fan in the drying tank can also accelerate the evaporation of the fluorinated oil on the surface of the SAW filter, thereby improving work efficiency and solving the technical problems in the prior art. Overall, this utility model has the advantages of simple structure, convenient operation, high work efficiency, and high success rate of oil immersion, which can effectively improve detection efficiency, reduce manual workload, and ensure high detection accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the frame in this utility model.

[0018] The reference numerals in the attached drawings are explained as follows: 1-Frame; 2-Soaking tank; 3-Washing tank; 4-Drying tank; 5-Lid closing mechanism; 5.1-Second drive motor; 5.2-Lid plate; 5.3-Guide strip; 6-Pressure plate; 7-First drive motor; 8-Vacuum pump; 9-Oil storage container; 10-Heating mechanism; 11-Exhaust fan; 12-Material transfer mechanism; 12.1-First support; 12.2-First linear motor; 12.3-Second linear motor; 12.4-Mechanical gripper; 13-Feeding mechanism; 13.1-Second support; 13.2-First conveyor; 13.3-Material cylinder; 14-Discharging mechanism; 14.1-Third support; 14.2-Second conveyor; 15-Vibrator. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] like Figures 1 to 2 As shown, this utility model provides an oil immersion device for a surface acoustic wave filter, including a frame 1, an immersion tank 2, a cleaning tank 3 and a drying tank 4 on the frame 1, and a cover mechanism 5 on the frame 1 for opening and closing the immersion tank 2, the cleaning tank 3 and the drying tank 4 respectively.

[0022] The outer edge of the opening of the soaking tank 2 is provided with a pressure plate 6, and the frame 1 is provided with a first drive motor 7 that drives the pressure plate 6 away from or close to the outer edge of the opening of the soaking tank 2. The soaking tank 2 is connected to a vacuum pump 8 and an oil storage container 9 respectively, and the oil storage container 9 is provided with a heating mechanism 10.

[0023] The drying tank 4 is connected to an exhaust fan 11.

[0024] A material transfer mechanism 12 is provided on the frame 1. The material transfer mechanism 12 includes a first support 12.1 fixed on the frame 1. A first linear motor 12.2 is mounted horizontally on the first support 12.1. The soaking tank 2, the washing tank 3, and the drying tank 4 are arranged along the direction of motion of the first linear motor 12.2. A second linear motor 12.3 is mounted on the output end of the first linear motor 12.2. The second linear motor 12.3 is arranged vertically, and a mechanical gripper 12.4 is mounted on the output end of the second linear motor 12.3. The mechanical gripper 12.4 is preferably a pneumatic gripper, which moves faster, reacts more sensitively, and effectively improves work efficiency. Under the operation of the material transfer mechanism 12, the first linear motor 12.2 drives the mechanical gripper 12.4 to move horizontally, while the second linear motor 12.3 drives the mechanical gripper 12.4 to move vertically. This allows the surface acoustic wave filter on the loading mechanism 13 to move into the soaking tank 2, then into the washing tank 3, then into the drying tank 4, and finally into the unloading mechanism 14.

[0025] It is worth mentioning that the rack 1 is equipped with a power supply box, PLC control cabinet, air supply device and control valves, which are connected to each mechanism to realize automated control. When it comes to electrical connections, those skilled in the art can clearly understand how to make the connections, so they will not be described in detail here.

[0026] One end of the material transfer mechanism 12 is provided with a feeding mechanism 13. The feeding mechanism 13 includes a second support 13.1 fixed on the frame 1. A first conveyor 13.2 is installed on the second support 13.1. A cartridge 13.3 for holding surface acoustic wave filters is provided on the first conveyor 13.2. The cartridge 13.3 is provided with a plurality of filtering holes. The cartridge 13.3 is made of metal wires woven into a net and then formed into a cylindrical shape. The mesh holes are the filtering holes. The aperture of the filtering holes is smaller than the outer dimension of the surface acoustic wave filter, so that the surface acoustic wave filter will not fall through the filtering holes, and other liquids can be filtered out. Many surface acoustic wave filters can be loaded into the cartridge 13.3 at one time, effectively improving the working efficiency.

[0027] The other end of the material transfer mechanism 12 is provided with a discharging mechanism 14. The discharging mechanism 14 includes a third support 14.1 fixed on the frame 1. A second conveyor 14.2 is installed on the third support 14.1.

[0028] Preferably, the cleaning tank 3 is connected with a vibrator 15. Under the action of the vibrator 15, back-and-forth vibration cleaning can be realized, and the fluorine oil adhered to the surface of the surface acoustic wave filter can be cleaned off.

[0029] The cover closing mechanism 5 includes a second driving machine 5.1 and a cover plate 5.2. The cover plate 5.2 is connected to the output end of the second driving machine 5.1. The second driving machine 5.1 drives the cover plate 5.2 to move back and forth. Specifically, on both sides of the cover plate 5.2 and symmetrically on both sides of the outer edge of the opening of each tank, guiding strips 5.3 are respectively provided. The guiding strips 5.3 are in the shape of "7". The cover plate 5.2 is just stuck therein, which can play a role in guiding and limiting the cover plate 5.2. A sealing strip is provided on the bottom surface of the pressing plate 6 to ensure the sealing performance and facilitate vacuum pumping. The first driving machine 7 drives the pressing plate 6 to move in the vertical direction to press the cover plate 5.2, so that a relatively sealed chamber can be formed in the soaking tank 2, and thus vacuum pumping and pressurization can be carried out. The pressing plate 6 is in the shape of "square", which can better cooperate with the soaking tank 2 to ensure the sealing performance. The first driving machine 7 and the second driving machine 5.1 preferably adopt air cylinders, with faster actions and more sensitive reactions, effectively improving the working efficiency.

[0030] The working principle of this utility model is as follows: First, a certain number of surface acoustic wave filters to be soaked in oil are loaded into the material cylinder 13.3. The feeding mechanism 13 works, and the first conveyor 13.2 conveys the material cylinder 13.3 to one end of the material transfer mechanism 12. In the second step, the material transfer mechanism 12 operates, and the mechanical claw 12.4 grabs the material cylinder 13.3, moves it, and places it in the soaking tank 2. Then, the lid closing mechanism 5 operates, and the second drive motor 5.1 drives the lid plate 5.2 to close the soaking tank 2. Then, the first drive motor 7 drives the pressure plate 6 to press the lid plate 5.2 tightly. Subsequently, the vacuum pump 8 extracts air from the soaking tank 2 to achieve a certain vacuum. For products with cracks or holes, the internal air is also evacuated at the same time. At this time, high-temperature fluorinated oil heated to 80°C by the heating mechanism 10 is injected under vacuum until the product is completely submerged. After a period of time, the lid plate 5.2 is opened, and an atmosphere of pressure is applied to the surface of the fluorinated oil. The pressure difference created by the pressurization can accelerate the penetration of fluorinated oil into the inner cavity of the product. Especially for products with small cracks or holes, the penetration of fluorinated oil is slow or the amount of penetration is small. Pressurization can also effectively penetrate this part of the product, which can further improve the screening ability. Finally, the mechanical claw 12.4 removes the material cylinder 13.3 and drains off the excess fluorinated oil. In the third step, the mechanical gripper 12.4 places the barrel 13.3 into the cleaning tank 3 containing alcohol. The second drive motor 5.1 drives the cover plate 5.2 to close the cleaning tank 3. Since the fluorinated oil is soluble in alcohol, and under the operation of the vibrator 15, the fluorinated oil adhering to the product surface can be cleaned off. However, the fluorinated oil in the inner cavity of the product is not easy to be cleaned off. After cleaning, the second drive motor 5.1 drives the cover plate 5.2 to open the cleaning tank 3, and the mechanical gripper 12.4 takes out the barrel 13.3 and drains off the excess alcohol. In the fourth step, the mechanical gripper 12.4 places the barrel 13.3 into the drying tank 4. The second drive motor 5.1 drives the cover plate 5.2 to close the drying tank 4, and the exhaust fan 11 starts working. Although alcohol is a volatile solution, the process requires a certain amount of time. The operation of the exhaust fan 11 can accelerate the evaporation of alcohol. After the surface is dried, the second drive motor 5.1 drives the cover plate 5.2 to open the drying tank 4, and the mechanical gripper 12.4 takes out the barrel 13.3 and places it on the unloading mechanism 14. The second conveyor 14.2 outputs the barrel 13.3. At this time, the surface acoustic wave filter has completed the fluorinated oil soaking. Products with good sealing performance do not contain fluorinated oil and their use is not affected. However, products with cracks and holes do not have fluorinated oil on the surface, but their internal cavity has been invaded by fluorinated oil. Finally, an electrical test is performed to screen out products that fail the electrical test. Fluorinated oil invades the inside of the product and adheres to the surface of the internal chip, changing its performance parameters. This indicates that the electrical test is unqualified, indicating that the sealing performance is unqualified and that there are pores. It should be noted that the electrical testing device can refer to the structure and working principle of Chinese patent application No. 202410668456.9, entitled "A Manual Testing Fixture for Surface Acoustic Filters", which will not be elaborated here.

[0031] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. An oil immersion device for a surface acoustic wave (SAW) filter, comprising a frame (1), wherein the frame (1) is provided with an immersion tank (2), a cleaning tank (3), and a drying tank (4), characterized in that: The frame (1) is provided with a cover mechanism (5) for opening and closing the soaking tank (2), the cleaning tank (3) and the drying tank (4) respectively. The soaking tank (2) has a pressure plate (6) on the outer edge of the opening. The frame (1) is provided with a first drive motor (7) that drives the pressure plate (6) away from or close to the outer edge of the opening of the soaking tank (2). The soaking tank (2) is connected to a vacuum pump (8) and an oil storage container (9). The oil storage container (9) is provided with a heating mechanism (10). The drying tank (4) is connected to an exhaust fan (11).

2. The oil immersion device for a surface acoustic wave (SAW) filter according to claim 1, characterized in that: The frame (1) is provided with a material transfer mechanism (12). The material transfer mechanism (12) includes a first bracket (12.1) fixed on the frame (1). A first linear motor (12.2) is mounted on the first bracket (12.1) in the horizontal direction. The soaking tank (2), the washing tank (3) and the drying tank (4) are arranged along the action direction of the first linear motor (12.2). A second linear motor (12.3) is mounted on the output end of the first linear motor (12.2). The second linear motor (12.3) is arranged in the vertical direction. A mechanical claw 12.4 is mounted on the output end of the second linear motor (12.3).

3. The oil immersion device for a surface acoustic wave (SAW) filter according to claim 2, characterized in that: One end of the material transfer mechanism (12) is provided with a feeding mechanism (13). The feeding mechanism (13) includes a second support (13.1) fixed on the frame (1). A first conveyor (13.2) is mounted on the second support (13.1). A material cylinder (13.3) for holding the surface acoustic wave filter is provided on the first conveyor (13.2).

4. The oil immersion device for a surface acoustic wave filter according to claim 3, characterized in that: The feed cylinder (13.3) has several filter holes.

5. An oil-immersion device for a surface acoustic wave (SAW) filter according to any one of claims 2 to 4, characterized in that: The other end of the material transfer mechanism (12) is provided with a material feeding mechanism (14), which includes a third support (14.1) fixed on the frame (1) and a second conveyor (14.2) mounted on the third support (14.1).

6. The oil immersion device for a surface acoustic wave (SAW) filter according to claim 1, characterized in that: The cleaning tank (3) is connected to a vibrator (15).

7. The oil immersion device for a surface acoustic wave filter according to claim 1, characterized in that: The closing mechanism (5) includes a second drive motor (5.1) and a cover plate (5.2). The cover plate (5.2) is connected to the output end of the second drive motor (5.1), and the second drive motor (5.1) drives the cover plate (5.2) to reciprocate.

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