CN112713866A

CN112713866A - Ceramic capacitor filter and production method thereof

Info

Publication number: CN112713866A
Application number: CN202110102877.1A
Authority: CN
Inventors: 朱江滨; 吴明钊; 吴育东; 吴文辉
Original assignee: Fujian Torch Electron Technology Co ltd
Current assignee: Fujian Torch Electron Technology Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-04-27
Anticipated expiration: 2041-01-26
Also published as: CN112713866B

Abstract

The invention provides a ceramic capacitor filter, which comprises a base with threads arranged on the outer periphery, a mounting slot arranged on the upper end of the base, a terminal rod arranged through the base, a plurality of ceramic capacitor chips vertically spaced in the mounting slot, The first insulating washer inside the installation groove, the second insulating washer sleeved on the terminal rod and the potting glue layer, the terminal rod includes an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, and the lower end of the first insulating washer is arranged at intervals from the bottom of the installation groove, The second insulating washer has the same diameter as the upper section and is sleeved on the lower section. The ceramic capacitor chip has conductive upper and lower ends, 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 invention also provides a production method of the ceramic capacitor filter. The inside of the present invention adopts conventional and general standard ceramic capacitors, which has strong adaptability, low processing difficulty, is suitable for mass production, can flexibly change the capacitance, and has a long service life.

Description

Ceramic capacitor filter and production method thereof

Technical Field

The invention relates to a ceramic capacitor filter and a production method thereof.

Background

In a conventional ceramic capacitor filter, as described in "a high temperature ceramic plate array capacitor and a method for manufacturing the same" (patent No. 202010555887.6), a ceramic dielectric having a disk shape or other shape is made of a ceramic material, and a desired electrode is provided on the ceramic dielectric to form a ceramic capacitor body. Such ceramic capacitor filters have the following drawbacks: firstly, the ceramic capacitor main part is the special non-standard ceramic capacitor of its producer self-production, and the model is single, can only be applicable to certain specific occasion, and adaptability is poor, and secondly the processing degree of difficulty is big, and thirdly can not change the electric capacity in a flexible way, and fourthly because of ceramic dielectric area is great, still breaks easily in the use, and life is short.

Disclosure of Invention

The invention aims to provide a ceramic capacitor filter and a production method thereof aiming at the defects of the prior art, wherein a conventional universal standard ceramic capacitor is adopted in the ceramic capacitor filter, the welding and assembling modes are improved, the adaptability is strong, the processing difficulty is small, the ceramic capacitor filter is suitable for batch production, the capacitance can be flexibly changed, and the service life is long.

The invention is realized by the following technical scheme:

a ceramic capacitor filter comprises a base with threads arranged on the periphery, an installation groove arranged at the upper end of the base, and a junction pole arranged by penetrating through the base, vertical interval sets up a plurality of ceramic capacitor chip in the mounting groove, set up the inboard first insulating washer in the mounting groove, establish second insulating washer and the casting glue layer on the connecting rod at the cover, the connecting rod includes upper segment and hypomere, the upper segment diameter is greater than the hypomere, first insulating washer lower extreme and mounting groove bottom interval arrangement, second insulating washer diameter is the same with the upper segment and the cover is established at the hypomere, ceramic capacitor chip has electrically conductive upper end and lower end, the lower end is connected with mounting groove bottom electrically conductive, the upper end is connected with the upper segment electrically conductive, first insulating washer is used for preventing that the upper end is connected with the base is electrically conductive, second insulating washer is used for preventing that the lower end is connected with the connecting rod electrically conductive, the casting glue layer is filled in the mounting groove.

Further, the base includes the hexagonal head and sets up the screw thread portion at the hexagonal head lower extreme, the mounting groove is by hexagonal head downwardly extending to screw thread portion.

Furthermore, the bottom of the mounting groove is provided with an upward convex ring, and the lower end of the first insulating gasket is arranged on the convex ring.

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

Further, 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.

Furthermore, the ceramic capacitor chips are uniformly arranged on the circumference.

Furthermore, the potting adhesive layer is epoxy resin potting adhesive.

Furthermore, the screw thread part is provided with a yielding hole with the same radius as that of the second insulating gasket, and the lower end of the second insulating gasket and the lower end of the screw thread part are located on the same plane.

The invention is also realized by the following technical scheme:

a production method of a ceramic capacitor filter comprises the following steps:

A. respectively placing a plurality of bases on which the first insulating gaskets are arranged on a welding jig, and dotting solder paste on the bottom of the mounting groove by using a coating machine;

B. a chip mounter is used for uniformly distributing a plurality of ceramic capacitor chips in the mounting groove in a circumferential manner;

C. arranging the connecting rods through the base, and applying solder paste on the contact positions of the ceramic capacitor chips and the connecting rods;

D. and after the mounting groove is welded through reflow soldering, the mounting groove is encapsulated, and an encapsulating adhesive layer is formed after encapsulation and solidification, so that the production is finished.

Further, the welding jig comprises a bottom plate and a plurality of grooves arranged on the bottom plate at intervals in an array mode, the grooves are matched with the thread portions, and through holes are formed in the bottoms of the grooves to expose the bottoms of the thread portions.

The invention has the following beneficial effects:

1. the base with the threads is provided with the mounting groove, the mounting groove is internally provided with the plurality of ceramic capacitor chips, the ceramic capacitor chips are conventional and universal standard ceramic capacitors in the market, and a proper number of standard ceramic capacitors can be selected according to actual use scenes to achieve required performance indexes, so that 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 washer and a second insulating washer are arranged and are respectively used for preventing the upper end from being in conductive connection with the base and preventing the lower end from being in conductive connection with the junction pole, the protection function penetrates through the welding and using processes, the connecting rod is arranged into an upper section and a lower section with different diameters for facilitating the welding of the ceramic capacitor chip and arranging the first insulating washer and the second insulating washer, the welding and assembling mode is improved, the processing difficulty of the ceramic filter is greatly reduced, moreover, the single ceramic capacitor chip is very small, the ceramic capacitor chip is protected in the mounting groove and the pouring sealant layer, the ceramic capacitor chip is not easy to break and other accidents in the using process, and the service life of the ceramic filter is prolonged; in the production process, the mounting groove and the design of the yielding hole can improve the positioning precision of the chip mounter, and the chip mounter can be produced in large batch by matching with a welding jig, so that the production efficiency is improved.

2. The base comprises the hexagonal head and the threaded part arranged at the lower end of the hexagonal head, the hexagonal head is used for assisting in mounting the ceramic filter, the threaded part is used for mounting the ceramic filter, and the hexagonal head is matched with the threaded part, so that the ceramic filter can be quickly and accurately mounted, the working efficiency of a user is improved, and the user experience is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1-1 is a schematic structural view of the present invention.

Fig. 1-2 are schematic views of the structure of another aspect of the present invention.

FIG. 2 is a schematic view of the structure of the present invention (removing the potting adhesive layer).

FIG. 3 is a schematic view of the structure of the present invention (removing the potting adhesive layer and the tie bar).

Fig. 4 is a schematic structural diagram of the base of the present invention.

Fig. 5 is a schematic structural view of the connecting rod of the present invention.

Fig. 6 is a schematic structural diagram of a welding jig of the present invention.

Wherein, 1, a base; 11. a hexagonal head; 12. a threaded portion; 13. a hole of abdication; 2. mounting grooves; 21. a convex ring; 3. a wire connecting rod; 31. an upper section; 32. a lower section; 4. a ceramic capacitor chip; 41. an upper end head; 42. a lower end head; 5. a first insulating gasket; 6. a second insulating gasket; 7. pouring a sealing adhesive layer; 81. a base plate; 82. a groove; 83. and a through hole.

Detailed Description

As shown in fig. 1 to 5, the ceramic capacitor filter includes a base 1 with threads arranged on the periphery, a mounting groove 2 arranged on the upper end of the base 1, a wiring rod 3 arranged by passing through the base 1, three ceramic capacitor chips 4 arranged in the mounting groove 2 at vertical intervals, a first insulating gasket 5 arranged on the inner side of the mounting groove 2, a second insulating gasket 6 sleeved on the wiring rod 3, and a pouring sealant layer 7, wherein the three ceramic capacitor chips 4 are uniformly arranged on the circumference. Base 1 includes hexagonal head 11 and sets up at the screw thread portion 12 of 11 lower extremes of hexagonal head, and the screw thread setting is in 12 peripheries on screw thread portion, and mounting groove 2 is by hexagonal head 11 downwardly extending to screw thread portion 12 in, and screw thread portion 12 middle part is seted up the hole of stepping down 13 the same with 6 radiuses of second insulating washer, and 6 lower extremes of second insulating washer are located the coplanar with 12 lower extremes on screw thread portion. The bottom of mounting groove 2 is provided with ascending nose circle 21, and terminal rod 3 includes upper segment 31 and hypomere 32, and the diameter of upper segment 31 is greater than

hypomere

32, and 5 lower extremes of first insulating washer set up on nose circle 21 in order to realize with mounting groove 2 bottom interval arrangement, and 6 diameters of second insulating washer are the same with upper segment 31 and the cover is established at

hypomere

32, and 6 upper ends of second insulating washer link together with the 31 lower extreme of upper segment.

Ceramic capacitor chip 4 has electrically conductive top end 41 and bottom end 42, and the bottom welding of bottom end 42 is in mounting groove 2 bottom, and the side welding of top end 41 is in last section 31, and first insulating washer 5 is used for preventing top end 41 and base 1 conductive connection, and second insulating washer 6 is used for preventing bottom end 42 and junction pole 3 conductive connection, and potting adhesive 7 fills in mounting groove 2.

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, so that the lower end 42 and the upper end 41 of the ceramic capacitor chip 4 can be prevented from being conducted.

In the present embodiment, the potting adhesive layer 7 is an epoxy resin potting adhesive. The first insulating gasket 5 and the second insulating gasket 6 are made of a high temperature resistant insulating material, such as high temperature resistant rubber.

The ceramic capacitor filter can be used on a PCB (printed circuit board) and can also be assembled on an equipment shell according to the requirement of a customer. During the use, use the contact pin to connect in the connecting rod both ends, perhaps use the wiring to weld in 3 both ends of binding post, base 1 is fixed in on the PCB board or on the equipment shell with ground connection through screw portion 12. In the case of actual demand, the number of ceramic capacitor chips 4 may be changed to change the ceramic capacitive filter capacitance.

The production method of the ceramic capacitor filter comprises the following steps:

A. respectively placing a plurality of bases 1 on which the first insulating gaskets 5 are arranged on a welding jig, and dotting solder paste on the bottom of the mounting groove 2 by using a coating machine; as shown in fig. 6, the welding jig is equipped with a plurality of bases 1, the welding jig includes a bottom plate 81 and a plurality of grooves 82 arranged on the bottom plate 81 in an array, the grooves 82 are matched with the threaded portions 12, and the bottoms of the grooves 82 are provided with through holes 83 to expose the bottoms of the threaded portions 12;

B. a plurality of ceramic capacitor chips 4 are circumferentially and uniformly distributed in the mounting groove 2 by using a chip mounter, as shown in fig. 3;

C. the tie bars are arranged through the submount 1 and the solder paste is applied at the points where the respective ceramic capacitor chips 4 are in contact with the tie bars, as shown in fig. 2;

D. and after the mounting groove 2 is welded through reflow soldering, encapsulating the mounting groove, and forming an encapsulating adhesive layer 7 after encapsulation and solidification, so that the production is completed, as shown in fig. 1-1.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims

1. A ceramic capacitor filter, characterized in that: it comprises a base with a thread on the periphery, a mounting groove arranged on the upper end of the base, a connecting rod arranged through the base, a number of ceramic capacitor chips arranged at vertical intervals in the mounting groove , The first insulating washer arranged on the inside of the installation groove, the second insulating washer and the potting glue layer sleeved on the connecting rod, the connecting rod includes an upper section and a lower section, the diameter of the upper section is larger than that of the lower section, and the lower end of the first insulating washer is connected to the bottom of the installation groove. The diameter of the second insulating washer 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. In order to prevent the conductive connection between the upper end and the base, the second insulating gasket is used to prevent the conductive connection between the lower end and the connecting rod, and the potting glue layer is filled in the installation groove.

2 . The ceramic capacitor filter according to claim 1 , wherein the base comprises a hexagonal head and a threaded portion disposed at the lower end of the hexagonal head, and the mounting groove extends downward from the hexagonal head to the threaded portion. 3 .

3 . The ceramic capacitor filter according to claim 1 , wherein an upward convex ring is arranged at the bottom of the installation groove, and the lower end of the first insulating washer is arranged on the convex ring. 4 .

4. A ceramic capacitor filter according to claim 1, 2 or 3, wherein 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 bottom of the mounting groove. Upper section.

5. A ceramic capacitor filter according to claim 1, 2 or 3, wherein the distance between the first insulating washer and the bottom of the mounting groove is greater than the height of the lower end, and the second insulating washer The distance between the upper end and the upper end of the upper end head is greater than the height of the upper end head.

6 . The ceramic capacitor filter according to claim 1 , wherein the plurality of ceramic capacitor chips are evenly arranged around the circumference. 7 .

7 . The ceramic capacitor filter according to claim 1 , wherein the potting glue layer is epoxy resin potting glue. 8 .

8. A ceramic capacitor filter according to claim 1, 2 or 3, characterized in that: the threaded portion is provided with an escape hole with the same radius as the second insulating washer, and the lower end of the second insulating washer is provided with the threaded portion. The lower end is in the same plane.

9. a production method of ceramic capacitor filter, is characterized in that: comprise the steps:

A. Place a plurality of bases with the first insulating washers arranged on the welding jig respectively, and use a coating machine to apply solder paste to the bottom of the installation groove;

B. Use the placement machine to evenly distribute the circumference of multiple ceramic capacitor chips in the installation groove;

C. Arrange the connecting rod through the base, and apply solder paste at the position where each ceramic capacitor chip is in contact with the connecting rod;

D. After soldering by reflow soldering, the installation groove is potted, and the potting glue layer is formed after potting and curing, and the production is completed.

10 . The method for producing a ceramic capacitor filter according to claim 9 , wherein the welding jig comprises a base plate and a plurality of grooves arranged on the base plate at intervals in an array, and the grooves are matched with the threaded part. 11 . , the bottom of the groove is provided with a through hole to expose the bottom of the threaded portion.