A ceramic capacitor filter and a production method thereof

Abstract

The present invention provides a ceramic capacitor filter, comprising a base with threads arranged on the outer circumference, a mounting groove arranged at the upper end of the base, a wiring rod arranged through the base, a plurality of ceramic capacitor chips arranged in the mounting groove at vertical intervals, a first insulating gasket arranged on the inner side of the mounting groove, a second insulating gasket sleeved on the wiring rod and a potting glue layer, the wiring rod comprises an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, the lower end of the first insulating gasket is arranged at intervals with the bottom of the mounting groove, the diameter of the second insulating gasket is the same as that of the upper section and is sleeved on the lower section, and the ceramic capacitor chip has a conductive upper end and a lower end, the lower end is conductively connected to the bottom of the mounting groove, and the upper end is conductively connected to the upper section. The present invention also provides a production method for a ceramic capacitor filter. The present invention adopts conventional and universal standard ceramic capacitors inside, has strong adaptability, low processing difficulty, is suitable for mass production, can flexibly change the capacitance, and has a long service life.

Description

Technical Field

[0001] The invention relates to a ceramic capacitor filter and a production method thereof. Background Art

[0002] As described in the patent titled "A High-Temperature Ceramic Plate Array Capacitor and Its Preparation Method" (patent number: 202010555887.6), the existing ceramic capacitor filter is made of ceramic materials to form a disc-shaped or other shaped ceramic medium, and then the required electrodes are set on the ceramic medium to form a ceramic capacitor body. This type of ceramic capacitor filter has the following defects: First, the ceramic capacitor body is a special non-standard ceramic capacitor produced by its manufacturer, with a single model, which can only be used in certain specific occasions and has poor adaptability. Second, it is difficult to process. Third, the capacitance cannot be flexibly changed. Fourth, due to the large area of ​​the ceramic medium, it is easy to break during use and has a short service life. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and propose a ceramic capacitor filter and a production method thereof, which uses conventional and universal standard ceramic capacitors internally and makes improvements in welding and assembly methods, has strong adaptability, low processing difficulty, is suitable for mass production, can flexibly change the capacitance, and has a long service life.

[0004] The present invention is achieved through the following technical solutions:

[0005] A ceramic capacitor filter comprises a base with threads arranged on the outer circumference, a mounting groove arranged at the upper end of the base, a wiring rod arranged through the base, a plurality of ceramic capacitor chips arranged in the mounting groove at vertical intervals, a first insulating gasket arranged on the inner side of the mounting groove, a second insulating gasket sleeved on the wiring rod and a potting glue layer, wherein the wiring rod comprises an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, the lower end of the first insulating gasket is arranged at an interval with the bottom of the mounting groove, the diameter of the second insulating gasket is the same as that of the upper section and is sleeved on the lower section, the ceramic capacitor chip has a conductive upper end and a lower end, the lower end is conductively connected to the bottom of the mounting groove, the upper end is conductively connected to the upper section, the first insulating gasket is used to prevent the upper end from being conductively connected to the base, the second insulating gasket is used to prevent the lower end from being conductively connected to the wiring rod, and the potting glue layer is filled in the mounting groove.

[0006] Furthermore, the base includes a hexagonal head and a threaded portion arranged at the lower end of the hexagonal head, and the mounting groove extends downward from the hexagonal head to the threaded portion.

[0007] Furthermore, an upward convex ring is arranged at the bottom of the mounting groove, and the lower end of the first insulating gasket is arranged on the convex ring.

[0008] Furthermore, the bottom of the lower end of the ceramic capacitor chip is welded to the bottom of the mounting groove, and the side of the upper end of the ceramic capacitor chip is welded to the upper section.

[0009] Furthermore, the distance between the first insulating gasket and the bottom of the mounting groove is greater than the height of the lower end, and the distance between the upper end of the second insulating gasket and the upper end of the upper end is greater than the height of the upper end.

[0010] Furthermore, the plurality of ceramic capacitor chips are evenly arranged around a circumference.

[0011] Furthermore, the potting glue layer is epoxy resin potting glue.

[0012] Furthermore, the threaded portion is provided with a clearance hole having the same radius as that of the second insulating washer, and the lower end of the second insulating washer and the lower end of the threaded portion are located in the same plane.

[0013] The present invention is also achieved through the following technical solutions:

[0014] A method for producing a ceramic capacitor filter comprises the following steps:

[0015] A. Place multiple bases with first insulating washers on the welding fixture, and use a coating machine to apply solder paste on the bottom of the installation slot;

[0016] B. Use a placement machine to evenly distribute multiple ceramic capacitor chips in the mounting slots;

[0017] C. Make the connecting rod pass through the base and apply solder paste at the position where each ceramic capacitor chip contacts the connecting rod;

[0018] D. After soldering through reflow soldering, the installation groove is potted. After the potting is cured, a potting glue layer is formed, and the production is completed.

[0019] Furthermore, the welding jig includes a base plate and a plurality of grooves arranged in an array on the base plate at intervals, the grooves match the threaded portion, and a through hole is opened at the bottom of the groove to expose the bottom of the threaded portion.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention provides a mounting groove on a base provided with threads, and arranges a plurality of ceramic capacitor chips in the mounting groove. The ceramic capacitor chips are standard ceramic capacitors commonly used in the market. A suitable number of standard ceramic capacitors can be selected according to the actual use scenario to achieve the required performance index. Therefore, the capacitance of the filter can be flexibly changed, and the adaptability is strong. In order to avoid short circuit between the upper end and the lower end of the ceramic capacitor chip, a first insulating gasket and a second insulating gasket are provided, which are respectively used to prevent the upper end from being electrically connected to the base and to prevent the lower end from being electrically connected to the wiring rod. This protective function runs through the welding and use process, and in order to facilitate the ceramic The welding of the ceramic capacitor chip and the setting of the above-mentioned first insulating gasket and the second insulating gasket, and the setting of the connecting rod into an upper section and a lower section with different diameters, thus improving the welding and assembly methods, greatly reducing the difficulty of ceramic filter processing. Furthermore, the individual ceramic capacitor chip itself is very small, and the ceramic capacitor chip is protected in the mounting groove and the potting glue layer. During use, the ceramic capacitor chip is not prone to accidents such as breakage, thereby extending the service life of the ceramic filter; in the production process, the design of the mounting groove and the give way hole can improve the positioning accuracy of the placement machine, and with the welding fixture, mass production can be carried out, thereby improving production efficiency.

[0022] 2. The base of the present invention includes a hexagonal head and a threaded portion arranged at the lower end of the hexagonal head. The hexagonal head is used to assist in the installation of the ceramic filter, and the threaded portion is used to install the ceramic filter. The hexagonal head and the threaded portion cooperate to quickly and accurately install the ceramic filter, thereby improving the user's work efficiency and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] Figure 1-1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 1-2 It is a structural schematic diagram of the present invention from another angle.

[0026] Figure 2 It is a schematic diagram of the structure of the present invention (without the potting glue layer).

[0027] Figure 3 Schematic diagram of the structure of the present invention (without the potting glue layer and the connecting rod).

[0028] Figure 4 It is a structural schematic diagram of the base of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the connecting rod of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the welding jig of the present invention.

[0031] Among them, 1. base; 11. hexagonal head; 12. threaded part; 13. clearance hole; 2. mounting groove; 21. raised ring; 3. connecting rod; 31. upper section; 32. lower section; 4. ceramic capacitor chip; 41. upper end; 42. lower end; 5. first insulating gasket; 6. second insulating gasket; 7. potting glue layer; 81. bottom plate; 82. groove; 83. through hole. DETAILED DESCRIPTION

[0032] As shown in Figure 1 to Figure 5 As shown, the ceramic capacitor filter comprises a base 1 with threads arranged on the outer circumference, a mounting groove 2 arranged at the upper end of the base 1, a wiring rod 3 arranged through the base 1, three ceramic capacitor chips 4 arranged vertically and spaced in the mounting groove 2, a first insulating gasket 5 arranged inside the mounting groove 2, a second insulating gasket 6 sleeved on the wiring rod 3 and a potting glue layer 7, and the three ceramic capacitor chips 4 are evenly arranged around the circumference. The base 1 comprises a hexagonal head 11 and a threaded portion 12 arranged at the lower end of the hexagonal head 11, the thread is arranged on the outer circumference of the threaded portion 12, the mounting groove 2 extends downward from the hexagonal head 11 to the inside of the threaded portion 12, a clearance hole 13 with the same radius as the second insulating gasket 6 is opened in the middle of the threaded portion 12, and the lower end of the second insulating gasket 6 and the lower end of the threaded portion 12 are located in the same plane. An upward convex ring 21 is provided at the bottom of the mounting groove 2, and the connecting rod 3 includes an upper section 31 and a lower section 32. The diameter of the upper section 31 is larger than that of the lower section 32. The lower end of the first insulating washer 5 is arranged on the convex ring 21 to achieve a spaced arrangement with the bottom of the mounting groove 2. The second insulating washer 6 has the same diameter as the upper section 31 and is sleeved on the lower section 32. The upper end of the second insulating washer 6 is connected to the lower end of the upper section 31.

[0033] The ceramic capacitor chip 4 has a conductive upper terminal 41 and a lower terminal 42, the bottom of the lower terminal 42 is welded to the bottom of the mounting groove 2, the side of the upper terminal 41 is welded to the upper section 31, the first insulating gasket 5 is used to prevent the upper terminal 41 from being conductively connected to the base 1, the second insulating gasket 6 is used to prevent the lower terminal 42 from being conductively connected to the wiring rod 3, and the potting glue layer 7 is filled in the mounting groove 2.

[0034] The distance between the first insulating gasket 5 and the bottom of the mounting groove 2 is greater than the height of the lower end 42, and the distance between the upper end of the second insulating gasket 6 and the upper end of the upper end 41 is greater than the height of the upper end 41, thereby ensuring that the lower end 42 and the upper end 41 of the ceramic capacitor chip 4 will not be conductive.

[0035] In this embodiment, the potting glue layer 7 is epoxy resin potting glue. The first insulating gasket 5 and the second insulating gasket 6 are made of high temperature resistant insulating material, such as high temperature resistant rubber.

[0036] The ceramic capacitor filter can be used on the PCB board, or assembled on the device housing according to customer needs. When in use, the pins are connected to the two ends of the connecting rod, or the wires are welded to the two ends of the connecting rod 3, and the base 1 is fixed to the PCB board or the device housing through the threaded part 12 for grounding. In the case of actual needs, the number of ceramic capacitor chips 4 can be changed to change the capacitance of the ceramic capacitor filter.

[0037] The production method of the ceramic capacitor filter includes the following steps:

[0038] A. Place multiple bases 1 with first insulating washers 5 respectively on a welding fixture, and use a coating machine to apply solder paste on the bottom of the mounting slot 2; Figure 6 The figure shows a welding jig with several bases 1 assembled thereon, the welding jig comprises a bottom plate 81 and a plurality of grooves 82 arranged in an array on the bottom plate 81, the grooves 82 match the threaded portion 12, and a through hole 83 is opened at the bottom of the groove 82 to expose the bottom of the threaded portion 12;

[0039] B. Use a placement machine to evenly distribute multiple ceramic capacitor chips 4 around the circumference of the mounting groove 2. Figure 3 As shown;

[0040] C. Place the connecting rod through the base 1 and apply solder paste at the position where each ceramic capacitor chip 4 contacts the connecting rod. Figure 2 As shown;

[0041] D. After soldering by reflow soldering, the installation groove 2 is potted, and after the potting is cured, a potting glue layer 7 is formed, and the production is completed. Figure 1-1 shown.

[0042] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A ceramic capacitor filter, characterized in that: The utility model comprises a base with threads arranged on the outer circumference, a mounting groove arranged on the upper end of the base, a wiring rod arranged through the base, a plurality of ceramic capacitor chips arranged in the mounting groove at vertical intervals, a first insulating gasket arranged on the inner side of the mounting groove, a second insulating gasket sleeved on the wiring rod and a potting glue layer, wherein the wiring rod comprises an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, the lower end of the first insulating gasket is arranged at intervals with the bottom of the mounting groove, the diameter of the second insulating gasket is the same as that of the upper section and is sleeved on the lower section, the ceramic capacitor chip has a conductive upper end and a lower end, the lower end is conductively connected to the bottom of the mounting groove, the upper end is conductively connected to the upper section, the first insulating gasket is used to prevent the upper end from being conductively connected to the base, the second insulating gasket is used to prevent the lower end from being conductively connected to the wiring rod, and the potting glue layer is filled in the mounting groove; the distance between the first insulating gasket and the bottom of the mounting groove is greater than the height of the lower end, and the distance between the upper end of the second insulating gasket and the upper end of the upper end is greater than the height of the upper end.

2. A ceramic capacitor filter according to claim 1, characterized in that: The base comprises a hexagonal head and a threaded portion arranged at the lower end of the hexagonal head, and the mounting groove extends downward from the hexagonal head to the threaded portion.

3. A ceramic capacitor filter according to claim 1, characterized in that: An upward convex ring is arranged at the bottom of the installation groove, and the lower end of the first insulating gasket is arranged on the convex ring.

4. A ceramic capacitor filter according to claim 1, 2 or 3, characterized in that: The bottom of the lower end of the ceramic capacitor chip is welded to the bottom of the mounting groove, and the side of the upper end of the ceramic capacitor chip is welded to the upper section.

5. A ceramic capacitor filter according to claim 1, 2 or 3, characterized in that: The plurality of ceramic capacitor chips are evenly arranged around a circumference.

6. A ceramic capacitor filter according to claim 1, 2 or 3, characterized in that: The potting glue layer is epoxy resin potting glue.

7. A ceramic capacitor filter according to claim 2, characterized in that: The threaded portion is provided with a clearance hole having the same radius as the second insulating washer, and the lower end of the second insulating washer and the lower end of the threaded portion are located in the same plane.

8. A method for producing a ceramic capacitor filter according to claim 1, characterized in that: The steps include: A. Place multiple bases with first insulating washers on the welding fixture, and use a coating machine to apply solder paste on the bottom of the installation slot; B. Use a placement machine to evenly distribute multiple ceramic capacitor chips in the mounting slot; C. Make the connecting rod pass through the base and apply solder paste at the position where each ceramic capacitor chip contacts the connecting rod; D. After soldering through reflow soldering, the installation groove is potted. After the potting is cured, a potting glue layer is formed, and the production is completed.

9. The method for producing a ceramic capacitor filter according to claim 8, characterized in that: The welding fixture comprises a bottom plate and a plurality of grooves arranged on the bottom plate in an array and at intervals, wherein the grooves match the threaded portion, and a through hole is provided at the bottom of the grooves to expose the bottom of the threaded portion.

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