CN101510920B - Filling-in type line filter - Google Patents
Filling-in type line filter Download PDFInfo
- Publication number
- CN101510920B CN101510920B CN2009100802069A CN200910080206A CN101510920B CN 101510920 B CN101510920 B CN 101510920B CN 2009100802069 A CN2009100802069 A CN 2009100802069A CN 200910080206 A CN200910080206 A CN 200910080206A CN 101510920 B CN101510920 B CN 101510920B
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- metal contact
- pcb printed
- printed board
- filter
- surface mount
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Abstract
The invention discloses an insert-type line filtering device in the field of communication technology. The technical scheme is that the device consists of PCB printed plate 201, one or more than one surface mount filter 202 and four metal wafers; wherein, one end of the PCB printed plate 201 is made into a debossed shape to be inserted into a port of a line bank of a telephone switching system; a first metal wafer 203 and a second metal wafer 204 are respectively positioned on upper surface of the top of the debossed shape of the PCB printed plate 201; a third metal wafer 205 and a fourth metal wafer 206 are respectively positioned on lower surface of the top of the debossed shape of the PCB printed plate 201; the surface mount filter is welded on the upper surface and/or lower surface of the PCB printed plate 201 by means of welding; the surface mount filters are connected through a printed wire 207 on the PCB printed plate. Compared with prior method, the insert-type line filtering device provided by the invention has simple manufacturing, convenient operation and flexible application.
Description
Technical field
The invention belongs to communication technical field, relate in particular to a kind of filling-in type line filter.
Background technology
At telephone switching system, such as all there being many external signal cables to link to each other in the systems such as SPC telephone exchange, program control scheduling machine with other outside equipment, these cables may be transferred to telephone switching system to the interference signal of external equipment sometimes, the interference signal in the telephone switching system may be transferred to external equipment sometimes.No matter be that interference signal is transferred to telephone switching system or is transferred to external equipment, all can influence the normal operation of system and equipment, work long hours in interference environment, also can reduce the useful life of system and equipment, more serious even can damage system.
In order to address the above problem, the current method of generally using as shown in Figure 1, Fig. 1 connects elimination interference signal schematic diagram by cable between telephone switching system and the external equipment, among Fig. 1, for the cable 101 that these telephone switching systems are connected with external equipment can be to external equipment generation interference signal 103 (electromagnetic wave beyond the useful signal) from inside to outside, and can be owing to these cables 101 make the interference signal 104 of outside ecto-entad enter interfering phone switching system behind the telephone switching system from cable 101 yet, can overlap upper magnetic ring 102 at cable near an end of telephone switching system, with eliminate from inside to outside interference signal 103 and the interference signal 104 of ecto-entad.Yet the method for using mostly designs complexity at present, performance difficulty, and cost is higher.
Summary of the invention
The present invention proposes a kind of filling-in type line filter, by this device is inserted in the line bank of connection cable, filters from inside to outside the interference signal with ecto-entad, reaches the purpose of protection equipment.
Technical scheme of the present invention is, a kind of filling-in type line filter is characterized in that described device is made up of 201,1 of PCB printed board or the surface mount filter 202 more than 1 and 4 metal contacts;
Wherein, an end of PCB printed board 201 is made into the character cut in bas-relief shape, is used to insert the line bank port of telephone switching system;
4 metal contacts are made by the Copper Foil in the PCB printed board 201, the first metal contact 203 and the second metal contact 204 lay respectively at the upper surface on the character cut in bas-relief shape top of PCB printed board 201, and the 3rd metal contact 205 and the 4th metal contact 206 lay respectively at the lower surface on the character cut in bas-relief shape top of PCB printed board 201; The first metal contact 203 and the 3rd metal contact 205 position symmetries, the second metal contact 204 and the 4th metal contact 206 position symmetries;
The first metal contact 203 links to each other with same surface mount filter by the track in the PCB printed board 201 207 respectively with the second metal contact 204;
The 3rd metal contact 205 links to each other with same surface mount filter by the track in the PCB printed board 201 207 respectively with the 4th metal contact 206;
Surface mount filter is welded on the upper surface and/or the lower surface of PCB printed board 201 by welding manner, connects by the track in the PCB printed board 207 between the surface mount filter.
The described first metal contact 203 and the second metal contact 204 pass through the base material insulation of PCB printed board 201 respectively with described the 3rd metal contact 205 and the 4th metal contact 206.
Effect of the present invention is that filling-in type line filter provided by the invention method processing than before is simple, and easy to operate, cost is low, applying flexible.
Description of drawings
Fig. 1 connects elimination interference signal schematic diagram by cable between telephone switching system and the external equipment.
Fig. 2 is a filling-in type line filter schematic diagram of the present invention.Wherein, (a) being filling-in type line filter upper surface schematic diagram, (b) is filling-in type line filter lower surface schematic diagram.
Fig. 3 is a filling-in type line filter schematic diagram of the present invention.
Fig. 4 is a telephone switching system line bank schematic diagram.
Fig. 5 is the side tangent plane schematic diagram that filling-in type line filter of the present invention inserts a port in the telephone switching system line bank.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Fig. 2 is a filling-in type line filter schematic diagram of the present invention.Among Fig. 2, (a) being filling-in type line filter upper surface schematic diagram, (b) is filling-in type line filter lower surface schematic diagram.PCB printed board 201 is a rectangle, and an end wherein becomes the character cut in bas-relief shape.The first metal contact 203, the second metal contact 204, the 3rd metal contact 205 and the 4th metal contact 206, make by the Copper Foil in the PCB printed board 201,4 metal contacts are parts of PCB printed board, be when making this PCB printed board, make according to design drawing, and can not spray paint, to guarantee conductivity.The first metal contact 203 and the second metal contact 204 lay respectively at the upper surface on the character cut in bas-relief shape top of PCB printed board 201, the 3rd metal contact 205 and the 4th metal contact 206 lay respectively at the lower surface on the character cut in bas-relief shape top of PCB printed board 201, the first metal contact 203 and the 3rd metal contact 205 position symmetries, the second metal contact 204 and the 4th metal contact 206 position symmetries.And the first metal contact 203 and the second metal contact 204 pass through the base material insulation of PCB printed board 201 respectively with the 3rd metal contact 205 and the 4th metal contact 206.Surface mount filter is welded on the upper surface and/or the lower surface of PCB printed board 201 by welding manner, is together in series by the track in the PCB printed board 207 between the surface mount filter.The PCB printed board is made according to design drawing, except the position that designs the metal contact in advance, also will design the track of series connection surface mount filter in advance.The thickness of printed board and width mainly are subjected to the restriction of line bank, different line banks, and size is also not necessarily identical, and the length of this printed board mainly is subjected to the spatial limitation around the line bank.
Fig. 3 is a filling-in type line filter schematic diagram of the present invention.Among Fig. 3, filling-in type line filter has used 4 filters.The number of the surface mount filter in the printed board of the present invention is one at least.Because a kind of surface mount filter generally has only a frequency filter area, so, in order to adapt to different scopes, just select different surface mount filter models, wider range if desired, when a surface mount filter can not meet the demands, just need to increase surface mount filter and replenish, with the scope of extension frequency filtration.Surface mount filter all is the chip that has four pins or four pins that can draw are arranged.Can regard surface mount filter as and have two ports of input and output (in fact being regardless of input and output), each port has the chip of two pins.Among Fig. 3,4 surface mount filters 202 are serially connected in the circuit.On physical connection, the first metal contact 203 through after 4 surface mount filters 202 and the 3rd metal contact 205 be communicated with by track 207; The second metal contact 204 through after 4 surface mount filters 202 and the 4th metal contact 206 be communicated with by track 207.
Fig. 4 is a telephone switching system line bank schematic diagram.Line bank is the frequent terminations that use of system such as telephone exchange, size is not necessarily identical with shape, but the principle major part is identical, 2 ports only draw among Fig. 4, be used to connect the internal circuit and the external equipment of switching equipment, line bank has a plurality of ports, each port has the draw-in groove of two output lines and incoming line, can block two incoming lines and two output lines, incoming line connects switching system, and output line connects other equipment, under normal circumstances, two incoming lines that block have the shell fragment correspondence to link to each other with output line in port inside, promptly incoming line 301 links to each other with output line 303, and incoming line 302 links to each other with output line 304.So the line bank with the present invention is used must meet following characteristics: each port connects two output lines and incoming line; Each port must be able to insert the PCB printed board of shape as shown in Figure 2.After inserting the PCB printed board, the signal that can keep port incoming line and output line is by filter of the present invention, can not cause line interruption, promptly incoming line 301 links to each other with the first metal contact 203 in the PCB printed board 201, and output line 303 links to each other with the 3rd metal contact 205; Incoming line 302 links to each other with the second metal contact 204, and output line 304 links to each other with the 4th metal contact 206, makes device serial connection of the present invention in former cable, plays filter action; Need to prove that present most of switching equipment such as SPC telephone exchange or the employed line bank of dispatcher all satisfy the requirement of using apparatus of the present invention, also we can say, the present invention very designs line bank commonly used.
Fig. 5 is the side tangent plane schematic diagram that filling-in type line filter of the present invention inserts a port in the telephone switching system line bank.Among Fig. 5, when filling-in type line filter inserts in the telephone switching system line bank, first sheet metal 203 of the upper surface of the PCB printed board 201 of filling-in type line filter one side links to each other with incoming line 301 in port, and the 3rd sheet metal 205 links to each other with output line 303 in port.Opposite side also is the same.Like this, the incoming line that is connected with telephone switching system (301 and 302) just links together by filling-in type line filter with the output line (303 and 304) that links to each other with outside other equipment.Thus, input signal and output signal are all passed through surface mount filter, make surface mount filter can eliminate the interference signal of turnover telephone switching system.
When using device of the present invention, this device is inserted in the corresponding port of line bank of certain the bar circuit that needs filtering, this device just serial connection in the line, by the propagation of the prevention of the filter on device interference signal.Because the element on the device and the size of PCB printed board can design according to the actual conditions that device context is used and adjust, so can adapt to different environment.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (2)
1. filling-in type line filter is characterized in that described device is made up of PCB printed board (201), surface mount filter (202) and 4 metal contacts more than 1 or 1;
Wherein, an end of PCB printed board (201) is made into the character cut in bas-relief shape, is used to insert the line bank port of telephone switching system;
4 metal contacts are made by the Copper Foil in the PCB printed board (201), the first metal contact (203) and the second metal contact (204) lay respectively at the upper surface on the character cut in bas-relief shape top of PCB printed board (201), and the 3rd metal contact (205) and the 4th metal contact (206) lay respectively at the lower surface on the character cut in bas-relief shape top of PCB printed board (201); The first metal contact (203) and the 3rd metal contact (205) position symmetry, the second metal contact (204) and the 4th metal contact (206) position symmetry;
The first metal contact (203) links to each other with same surface mount filter by the track (207) in the PCB printed board (201) respectively with the second metal contact (204);
The 3rd metal contact (205) links to each other with same surface mount filter by the track (207) in the PCB printed board (201) respectively with the 4th metal contact (206);
Surface mount filter is welded on the upper surface and/or the lower surface of PCB printed board (201) by welding manner, connects by the track (207) in the PCB printed board between the surface mount filter.
2. a kind of filling-in type line filter according to claim 1 is characterized in that the described first metal contact (203) and the second metal contact (204) pass through the base material insulation of PCB printed board (201) respectively with described the 3rd metal contact (205) and the 4th metal contact (206).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100802069A CN101510920B (en) | 2009-03-13 | 2009-03-13 | Filling-in type line filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100802069A CN101510920B (en) | 2009-03-13 | 2009-03-13 | Filling-in type line filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101510920A CN101510920A (en) | 2009-08-19 |
| CN101510920B true CN101510920B (en) | 2011-02-16 |
Family
ID=41003181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100802069A Expired - Fee Related CN101510920B (en) | 2009-03-13 | 2009-03-13 | Filling-in type line filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101510920B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1527330A (en) * | 2003-03-05 | 2004-09-08 | 东京零件工业股份有限公司 | Line filter |
| CN1933059A (en) * | 2005-09-12 | 2007-03-21 | 东京零件工业股份有限公司 | Line filter and its manufacturing method |
-
2009
- 2009-03-13 CN CN2009100802069A patent/CN101510920B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1527330A (en) * | 2003-03-05 | 2004-09-08 | 东京零件工业股份有限公司 | Line filter |
| CN1933059A (en) * | 2005-09-12 | 2007-03-21 | 东京零件工业股份有限公司 | Line filter and its manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-153216A 2004.05.27 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101510920A (en) | 2009-08-19 |
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Granted publication date: 20110216 Termination date: 20200313 |