CN2548365Y

CN2548365Y - Wave filter

Info

Publication number: CN2548365Y
Application number: CN 01234715
Authority: CN
Inventors: 陈辉堂
Original assignee: XINRUI INTERNATIONAL CO Ltd
Current assignee: XINRUI INTERNATIONAL CO Ltd
Priority date: 2001-10-18
Filing date: 2001-10-18
Publication date: 2003-04-30
Anticipated expiration: 2011-10-18

Abstract

A filter is provided, including at least one circuit board with variety of electric modules, the two different ends of the circuit board referred both have a respective coherence circuit, two joints different from the two ends of the earthed circuits respectively fixed on the main circuit board axially, the joints referred can be connected to the coaxial cable and includes a metal part connected to ground and a terminal disposed axially and insulated with the metal part, and an external pipe covered on the two joints and the circuit board simultaneously. The characters of the utility model are that the two parallel sides of the circuit board have a respective coherence circuit, and the circuits referred are conducted to the two metal parts locating at joints on the two ends of the circuit board and connected to the ground. The weak grounding performance and complex production process can be avoided by introducing the structure combination and particular grounding mode.

Description

Filter

Technical field

The relevant a kind of filter of the utility model.

Background technology

At present general information signal transfer mode is nothing more than the dual mode of surfing the Net by dialing netwok access or wideband, the wideband online is because speed is fast and capacity is accepted by society greatly gradually, its on-line mode is to utilize telephone wire or cable tv coax dual mode respectively, with the transmission means of telephone wire because frequency is lower and Computer signal is close with the telecommunication signal frequency, but the phenomenon that interferes with each other also is difficult to avoid, though taking advantage of, it carries finite capacity, still must collocation use the ultralow frequency filter, because described this class ultralow frequency filter not in the utility model technical field, therefore is not described herein in addition; If utilize the coaxial cable of cable TV, because of cable necessary transmitting television signals and Computer signal simultaneously, and two kinds of signal frequency height differ greatly (television high frequency with intensity, the computer low frequency), therefore can produce the situation that interferes with each other, for fear of correct, the clear and speed that influences television image quality or downloaded data simultaneously, so the appearance of this class filter has just been arranged.

Summon on the market at present usefulness filter mainly can divide into the high pass filter (HPF that is used for TV, HighPass Filter), low pass filter (the LPF that is used for computer, Low Pass Filter) and can be used in the compound of TV or computer respectively, for example: frequency range is by filter (BPF, Band Pass Filter) with frequency range cut-off filter (BSF, Band Stop Filter) several patterns such as, yet, filter high frequency or low frequency no matter be, outside electronic building brick on the dividing circuit plate is different with the configuration of circuit, its outward appearance and main structure do not have any difference, because of the electronic component layout on the circuit board is not an emphasis of the present utility model, therefore the filter of two kinds of difference in functionalitys only partly is illustrated with regard to its main structure in this not separated narration.

As shown in figure 10, in order to provide the preferable at present general commercially available filter of filter effect to include several section filter 50 of series connection mutually, and be installed with a joint 51 respectively in the end of outermost section filter 50, described joint 51 can be used as transmission signals for being connected with the coaxial cable (not shown), wherein, the shell of described section filter 50 is to be made of metal, and form ground connection against each other, and be to form by a lead 52 to be communicated with between two two filters, mutual insulating between the shell of described lead 52 and section filter 50, be equiped with some electronic building bricks in each filter, simultaneously for to make filter that preferable filter effect can be arranged, each section filter 50 has at least one variable capacitance 53 usually and extends to filter device surface, so that adjust its by and pass through frequency, because of circuit design is not the utility model target, therefore repeat no more, when filter can cooperate network analyzer to adjust variable capacitance 53 via the operator during still for semi-finished product filter is adjusted to optimum state, last sheathed location one outer tube 54 on section filter 50 shells against each other again, and make filter form a cylindrical structural, influence filter effect in the filter for avoiding aqueous vapor to enter again, even the useful life of reducing filter, usually the earlier sheathed O shape ring 511 of meeting refills and establishes outer tube 54 on the joint 51 at filter two ends, enters in the filter so as to avoiding aqueous vapor.

Above-mentioned existing filter, though can reach the purpose of filtering different frequency signals, existing down in the middle of the manufacturing production process, the Lieque fraud has to be overcome:

1, the signal transmission effect is poor, the connection of its ground connection is to rely on the ora terminalis of section filter 50 shells against each other, and the oversize coupling that does not have impedance of the main line of signal, therefore the loss of signal after passing through is bigger, and impedance matching is difficult, and then influences the effect of filter, though 51 of two joints are arranged with a metal outer pipe 54, yet because of O shape ring 511 is to be installed between joint 51 and the outer tube 54, dimension outer tube 54 there is no any help for ground connection property.

2, the upright process of group is complicated and mechanism element is many, each section filter 50 must separate groups be stood, relend by lead 52 and connect mutually, not good for overcoming ground connection property again to harmful effect that filter effect caused, must adjust the variable capacitance 53 in the filter respectively, sheathed more at last outer tube 54, the upright process of complicated like this group is time and effort consuming considerably, so can't improve production capacity effectively, improved production cost in the middle of invisible.

Summary of the invention

Main purpose of the present utility model is to provide the filter that a kind of ground connection and isolation effect are all good and filter effect is good.

Secondary objective of the present utility model is providing a kind of group cube just and can produce the filter that reduces cost in a large number.

Based on above-mentioned purpose, filter of the present utility model, it comprises: at least one circuit board, described circuit board is provided with various electronic building brick, and the different both sides of described circuit board are respectively equipped with a coherent circuit; Two axially are fixedly arranged on the joint that main circuit board differs from the earthed circuit both sides respectively, and described joint can axially be provided with and forms the terminal of insulation with metal part for the metal part and that is connected with coaxial cable and includes ground connection; And one be sheathed on two joints and the outer tube of coating circuit plate simultaneously; Be characterized in: two parallel long limits of described circuit board are respectively equipped with the circuit that links up, and described circuit forms conducting ground connection with the metal part of circuit board two end connectors respectively.

Can reach the filter effect that promotes filter by such textural association, and so as to improving filtering characteristic and shortening man-hour to improve production capacity.The utlity model has following advantage specifically: 1, the ground connection effect is good, because earthed circuit of the present utility model is to finish in the mode of welding from the beginning to the end, and cooperate the earthed circuit net intermesh, therefore can obtain splendid conductivity, ground connection property and isolation, and then promote filter effect of the present utility model, and omit complicated adjustment program in the existing filter production process.2, production capacity height, because circuit of the present utility model is to adopt the mode of surface soldered to design, therefore only need write suitable program, circuit board gets final product a large amount of automated productions of matching surface bonding machine, therefore the upright process of group only needs soldered circuit board and joint, sheathed again outer tube gets final product, because the upright process of group is simplified, reduces production costs admittedly can improve production capacity.3, circuit board can be adopted the three-dimensional space design, so as to dwindling the volume of filter, makes the utility model more can meet the compact characteristic of modern product.

Understand the purpose of this utility model, characteristics and advantage for clearer, preferred embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the stereochemical structure exploded view of the utility model one preferred embodiment;

Fig. 2 is the part plan view from above of the utility model one preferred embodiment;

Fig. 3 is the part face upwarding view of the utility model one preferred embodiment;

Fig. 4 is the stereochemical structure exploded view of another preferred embodiment of the utility model;

Fig. 5 is the part plan view from above of another preferred embodiment of the utility model;

Fig. 6 is the part face upwarding view of another preferred embodiment of the utility model;

Fig. 7 is the part side plan view of another preferred embodiment of the utility model;

Fig. 8 is the plan view from above of another preferred embodiment of the utility model circuit board;

Fig. 9 is the user mode figure of another preferred embodiment of the utility model circuit board;

Figure 10 is the stereo appearance figure of existing filter.

Embodiment

See also as shown in Figures 1 to 3, the filter of the utility model one preferred embodiment, it comprises a rectangle circuit board 10, be provided with various electronic components by the surface soldered mode on the described circuit board 10, so as to reaching the function of filtering unwanted signal, because the configuration of the electronic component on the circuit board 10 is not a target of the present utility model, therefore repeat no more, two minor faces of described circuit board 10 axially set firmly a joint 20 respectively, the metal part and one that described joint 20 includes ground connection axially is provided with and forms the terminal (not shown) of insulation with metal part, described joint 20 can be for being connected with the coaxial cable (not shown), transmission is used as signal, two long limits of described circuit board 10 are respectively equipped with a circuit 11 parallel to each other, and the two-end-point of each circuit 11 partly is communicated with formation ground connection with the metal of joint 20 respectively, in preferred embodiment of the present utility model, circuit 11 partly is to utilize the mode of soldering affixed with the metal of joint 20, so can obtain best conductivity and ground connection effect.

One outer tube 30 is sheathed to be positioned between two joints 20 and coating circuit plate 10, and make filter form a column structure, for asking the convenience in the manufacturing, outer tube 30 of the present utility model is a round tube, and for avoiding aqueous vapor to enter influencing in the filter filter effect even shortening filter useful life, usually earlier sheathed O shape ring 21 refills and establishes outer tube 30 on the joint 20 at filter two ends, and utilizes the mode of pressing that outer tube 30 is fixed on the joint 20, enters in the filter so as to avoiding aqueous vapor.So, outer tube 30 can contact fully with joint 20, so except the welding of earthed circuit 11 and joint 20, cooperate outer tube 30 and joint 20 can obtain dual ground connection effect, because whether good the influence for ultra-high-frequency filter of ground connection property be very big, because structural arrangements of the present utility model is through well-designed and have an excellent ground connection connected mode, does not therefore need can reach good filter effect through adjusting in the upright process of group.

Please cooperate again and consult shown in Fig. 4 to 7, it shown in the figure another preferred embodiment of the present utility model, in the present embodiment earthing mode of circuit board with and be identical with the joint pattern of joint 20 and outer tube 30 with aforesaid embodiment, the main difference of itself and aforesaid embodiment is that present embodiment is the main circuit board 10 and secondary circuit board 100 that comprises two settings parallel to each other, described two circuit boards 10,100 different two sides are the electronic components that are installed with various different types respectively in the mode of surface soldered, and its main signal circuit is to print to form on circuit, and two circuit boards 10,100 ground connection being utilizes copper post 101 to interconnect, because the filtration of signal is to adopt incremental mode, be the influence of magnetic field filter effect of avoiding filter itself to be produced, therefore on main circuit board 10 or circuit board 100, vertically stretch out several pieces dividing plates that can isolate magnetic field 102, described dividing plate 102 is arranged to semicircle for the shape that cooperates outer tube 30 and joint 20, arbitrary face of described dividing plate 102 is provided with the secondary circuit that is communicated with main circuit, and be welded with electronic building brick, the Copper Foil (not shown) and the another side of described dividing plate 102 has been sticked, described Copper Foil can be communicated with the earthed circuit 11 of main circuit board 10 both sides, to strengthen the effect that ground connection of the present utility model is promptly isolated, like this, not only make filter effect of the present utility model more stable, and circuit design of the present utility model can be extended to the three-dimensional space by dual space, so as to dwindling the volume of filter, make it more can meet the compact characteristic of modern product.

Though the utility model is respectively equipped with an earthed circuit 11 and is connected with on joint 20 in the both sides of circuit board 10, but in the technical field of hyperfrequency, it is not enough that such ground connection effect is still disliked slightly, please cooperate and consult Fig. 7 and shown in Figure 8, because above-mentioned blemish in an otherwise perfect thing place, the utility model can be set up an earthed circuit net 110 that intermeshes and be communicated with earthed circuit in 11 of two earthed circuits, to improve ground connection effect of the present utility model, make no matter the utility model all can provide the user excellent filter effect in any frequency.

Claims

1, a kind of filter, it comprises:

At least one circuit board, described circuit board is provided with various electronic building brick, and the different both sides of described circuit board are respectively equipped with a coherent circuit;

Two axially are fixedly arranged on the joint that main circuit board differs from the earthed circuit both sides respectively, and described joint can axially be provided with and forms the terminal of insulation with metal part for the metal part and that is connected with coaxial cable and includes ground connection; And

One is sheathed on two joints and the outer tube of coating circuit plate simultaneously; It is characterized in that:

Two parallel long limits of described circuit board are respectively equipped with the circuit that links up, and described circuit forms conducting ground connection with the metal part of circuit board two end connectors respectively.

2, filter as claimed in claim 1 is characterized in that, is provided with an earthed circuit net between the circuit that described circuit board two links up, described circuit network respectively with two circuit turn-ons that link up.

3, filter as claimed in claim 2 is characterized in that, described earthed circuit net is made up of the circuit that intermeshes.

4, filter as claimed in claim 1 or 2 is characterized in that further comprising:

One is located at the secondary circuit board between two joints, and described secondary circuit board is parallel to described circuit board, and its dual-side that differs from the one side of described circuit board also is arranged to earthed circuit respectively, and by the mutual conducting of the earthed circuit of copper post and circuit board; And

Several pieces vertically are stretched at the dividing plate on the circuit board, and arbitrary face of described dividing plate is provided with various electronic component, the Copper Foil and its another side has been sticked, the earthed circuit of described Copper Foil circuit connectable plate dual-side.

5, filter as claimed in claim 1 or 2 is characterized in that, is arranged with O shape ring on described two joints respectively, and described O shape ring can be butted on the inwall of outer tube for pasting.

6, filter as claimed in claim 4 is characterized in that, is arranged with O shape ring on described two joints respectively, and described O shape ring is to be butted on the inwall of outer tube for pasting.

7, filter as claimed in claim 4 is characterized in that, described dividing plate is arranged to semicircle.

8, filter as claimed in claim 5 is characterized in that, described dividing plate is arranged to semicircle.

9, filter as claimed in claim 6 is characterized in that, described dividing plate is arranged to semicircle.