CN2739822Y - Coaxial cable joint - Google Patents
Coaxial cable joint Download PDFInfo
- Publication number
- CN2739822Y CN2739822Y CN 200420012406 CN200420012406U CN2739822Y CN 2739822 Y CN2739822 Y CN 2739822Y CN 200420012406 CN200420012406 CN 200420012406 CN 200420012406 U CN200420012406 U CN 200420012406U CN 2739822 Y CN2739822 Y CN 2739822Y
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- CN
- China
- Prior art keywords
- guide pin
- center guide
- coaxial cable
- joint
- insulating part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a coaxial cable joint, comprising a tubular hollow body. The body is provided with an axial center guide pin. The center position of the center guide pin is fixed in the body through an insulated piece. A certain space is provided between the center guide pin and the body. The air is used as the medium. The periphery of one end of the insulating body is provided with a sealing ring for obstructing the water air. The periphery of the other end is provided with a C-shaped fixing ring. One end of the center guide pin is bulged outside the body. The center of the other end is axially provided with an axial bore. The outer edge of the axial bore is provided with a groove. The internal diameter of the axial bore can be contracted and is equal to the diameter of the matched center guide pin jut. The other end is matched in the coupling mode with the air as the medium. The end of the other end is provided with a guard ring. The body is provided with another sealing ring for preventing the water air. Therefore, according to the size of each section of the center guide pin, the utility model can be designed into the matched impedance of 75 Ohm or 50 Ohm and has the function of low backward wave loss and high-frequency transfer. Meanwhile, the coaxial cable joint has the efficiencyof water-proof through the arrangement of the two sealing rings.
Description
Technical field
The utility model relates to a kind of joint of coaxial cable, particularly a kind of F joint of coaxial cable.
Background technology
General common F joint, see also shown in Figure 1, it has plurality of advantages, thick as low price, the RG59 coaxial wire that is connected with it, mechanical strength is strong, signal transmission attenuation is less, video data can transmitting range far away etc., therefore, it is general is used in all over the world video signal transmission category.
At present the transmitted frequency of analog television is between 200～400MHz or lower, and the DVB-T frequencies of propagation has the trend of the development of past high frequency 800～900MHz, as the 2.4GHz of blue bud even to 5.8GHz, and 10 designs of traditional F joint face and can't satisfy its function in high-frequency transmission, most important reason is that its outside loss greatly, does not have the suitable resistance coupling when transmission signals.
Moreover, modern family, from the antenna to the television set, the signal transmission of recording playback film projector, CD-ROM device etc. all needs F joint, its use amount not to wait from several to dozens of, global use amount, its number considerable not hard to imagine.Yet, the present employed F joint 10 of commonly using, because transmission frequency is low, so the characteristic of loss and coupling is not just noted, application up to frequency is more and more higher, the engineering master's homegate of design just finds can not satisfy with existing joint 10 demand of system, even the flaw of joint 10 but misleads and think that problem has appearred in system design, has spent sizable manpower and time cost just to find out the very crux, in addition, this is commonly used F joint 10 and uses parts many, cause assembling loaded down with trivial details, so, this commonly uses 10 designs of F joint, under profit-push and reducing cost, but ignored the importance of coupling when circuit uses, cause the significant drawback that can't be applied to high-frequency transmission.
The utility model content
The purpose of this utility model is to solve the problem that can not satisfy the high-frequency transmission requirement that above-mentioned coaxial cable F joint exists, and a kind of joint that overcomes the coaxial cable of above-mentioned shortcoming is provided.
The utility model includes:
One cannulated body;
One center guide pin, it axially is located in the cannulated body, the nearly centre of this center guide pin is fixed in the cannulated body with an insulating part, keep a suitable spacing between center guide pin and cannulated body, and can be with air as medium, the outstanding cannulated of this center guide pin one end parts is originally external, the center of end in axial direction is drilled with an axial hole in addition, make internal diameter be reduced to the center guide pin diameter of required cooperation, this axial hole outer rim is cut with a groove, and making in addition, end is that medium is made the coupling coupling with the air;
One for intercepting the sealing ring that aqueous vapor enters, and it is located on the insulating part one end periphery;
One C type retainer ring, it is located on the insulating part other end periphery;
One guard ring, it is installed on the end of cannulated body corresponding to the center guide pin other end;
One another sealing ring, it is located on the cannulated body, for preventing entering of aqueous vapor, therefore, can be at the variation of every section size of center guide pin, the utility model is designed to the matched impedance of 75 ohm or 50 ohm, and has the constant low-loss high frequency transfer function.
Described insulating part and center guide pin are to utilize injection molding method, and insulating part and center guide pin are combined as a whole.
Described center guide pin and the embossing of insulating part contact-making surface or make the surface produce sags and crests or square are to prevent mutual slip.
Described retainer ring can be the phosphor bronze material.
The matched impedance of described center guide pin and cannulated body is 75 ohm or 50 ohm, so that the function of high-frequency transmission to be provided.
Described center guide pin can machine with different modes such as lathe or punching presses.
Described cannulated body is finished by die casting or forging or punching press or machined into.
Described insulating part can be designed to porous under intensity permission situation, make size decreases.
The utility model becomes the impedance matching of 75 ohm or 50 ohm with the F joint design of coaxial cable, and has the high-frequency transmission function of extremely low return loss, as 2.4GHz, simultaneously, by the setting of sealing ring and another sealing ring, and has preferable waterproof effect.
Description of drawings
Fig. 1 is a structural representation of commonly using the F joint of coaxial cable.
Fig. 2 is a cross-sectional schematic of the present utility model.
Embodiment
See also shown in Figure 2; the utility model is provided with a cannulated body 21; has an axial center guide pin 22 in this cannulated body 21; these center guide pin 22 nearly centre are fixed in the cannulated body 21 with an insulating part 23; in the utility model; this insulating part 23 must be the heat conduction height; water absorption is low; thermal coefficient of expansion is little; the advanced low-k materials that mechanical strength is high; 21 of center guide pin 22 and cannulated bodies keep a suitable spacing; and can be with air as medium; these insulator 23 1 end peripheries are provided with one for intercepting the sealing ring 24 that aqueous vapor enters; other holds periphery then to be provided with a C type retainer ring 25; in the present embodiment; this retainer ring 25 is the phosphor bronze material; outside the outstanding cannulated body 21 of center guide pin 22 1 end parts; the center of end in axial direction is provided with an axial hole 26 in addition; the outer rim of this axial hole 26 is cut with groove 27; make internal diameter be reduced to center guide pin protuberance 30 diameters of required cooperation; making this hold with the air in addition is that medium is made the coupling coupling; this cannulated body 21 is equiped with a guard ring 28 on this end of holding in addition; in addition; this cannulated body 21 is provided with another sealing ring 29, for preventing entering of aqueous vapor.
So, can be at the variation of center guide pin 22 every section sizes, the utility model is designed to the matched impedance of 75 ohm or 50 ohm, and has the high-frequency transmission function of low return loss, as 2.4GHz, simultaneously, by the setting of sealing ring 24 and another sealing ring 29, and has preferable waterproof effect.
See also shown in Figure 2ly again, the utlity model has following advantage:
When 1, connecting, little by the insertion loss of signal;
2, during transmission signal, return loss is low, and 2.4GHz is-20dB
3, can be designed to the matched impedance of 75 ohm or 50 ohm, so that the function of high-frequency transmission to be provided;
4, inner spare part is simple, and assembling easily;
5, pass through the setting of sealing ring 24 and another sealing ring 29, and have the waterproof effect good than prior art.
See also shown in Figure 2ly again, function of the present utility model and characteristic are as follows:
1, the coupling of impedance: impedance match is to measure the joint impedance with time interval reflection instrument timedomain reflectmetor (TDR)
Z＝Z
O *(1+Γ)/(1-Γ)
For example: measure the F joint with 50 ohm TDR and obtain the about 200psec of Γ value.Measure the F joint with 75 ohm TDR and obtain the about 280psec of Γ value.
2, return loss test: the simplest method for measurement is to measure return loss return loss with the net analysis instrument.
When 3, connecting, insert loss: it is very little that insertion loss inserts loss value, as long as mechanical dimension's design is correct, machining can adhere to specification, and it inserts loss and all can reach about 0.1dB when 1.5GHz.
4, aqueous vapor intercepts;
A), put one on the right side of insulating part 23 and intercept the sealing ring 24 that aqueous vapor enters, and via C shape retainer ring 25 extruding in the left side of this insulating part 23, what order can the moisture-barrier aqueous vapor flows.
B), one guard ring 28 is set, its property class except containing impedance matching, has the function that intercepts aqueous vapor like these insulating part 23 designs simultaneously at cannulated body 21 other ends.
5, insulating part 23 utilizes injection molding method with center guide pin 22, this insulating part 23 is combined as a whole with center guide pin 22, so that make, in addition, center guide pin 22 is with insulating part 23 contact-making surface embossing or make the surface produce sags and crests or oval to prevent mutual slip.
See also again shown in Figure 2, number of assembling steps of the present utility model and the order as follows:
First step: at first with sealing ring 24 by inserting on earth in the cannulated body 21;
Second step: with behind center guide pin 22 and the insulating part 23 ejection formation, after cannulated body 21 places sealing ring 24;
Third step: C retainer ring 25 is given as security in cannulated body 21 grooves;
The 4th step: guard ring 28 is mounted to cannulated body 21 end place in addition, is fixed by cannulated body 21 external forms extruding reducing.
So, reach assembling and be easy to purpose, can reduce cost and make fast.
See also shown in Figure 2ly again, the overall dimensions of the utility model cannulated body 21 do not change with the design of commonly using the F joint, to keep the compatibility of mutual usefulness;
UNEF-2A or 3/8 for example: 3/8 "-32 "-32 UNEF-2B, hexagonal profile, outer shroud water proof ring etc.
In addition, see also shown in Figure 2ly again, the utility model utilizes radio frequency lead transmission principle, center guide pin 22 and cannulated body 21 is dimensioned to the impedance matching of 75 ohm or 50 ohm, so that the function of high-frequency transmission to be provided.And center guide pin 22 can machine with different modes such as machined into or punching presses.And aqueous vapor intercepts and can reach airtight effect after extruding with soft waterproof material or soft coating.And cannulated body 21 is to be finished by die casting or forging or punching press or machined into.And center guide pin 22 combines with insulating part 23 can be by the jet-out plastic moulding.And insulating part 23 can be designed to porous under intensity permission situation, make size decreases.In addition, being provided with of sealing ring 24 and another sealing ring 29 can be a complete circle, or smears thin layer and reach through extruding and seal effect, and cannulated body 21 threads can the soft waterproof material of coating, to increase tight function.
Claims (8)
1, a kind of joint of coaxial cable is characterized in that: include:
One cannulated body;
One center guide pin, it axially is located in the cannulated body, the nearly centre of this center guide pin is fixed in the cannulated body with an insulating part, keep a suitable spacing between center guide pin and cannulated body, and can be with air as medium, the outstanding cannulated of this center guide pin one end parts is originally external, the center of end in axial direction is drilled with an axial hole in addition, make internal diameter be reduced to the center guide pin diameter of required cooperation, this axial hole outer rim is cut with a groove, and end is that medium is made the coupling coupling with the air in addition;
One for intercepting the sealing ring that aqueous vapor enters, and it is located on the insulating part one end periphery;
One C type retainer ring, it is located on the insulating part other end periphery;
One guard ring, it is installed on the end of cannulated body corresponding to the center guide pin other end;
One another sealing ring, it is located on the cannulated body.
2, the joint of a kind of coaxial cable according to claim 1 is characterized in that: described insulating part and center guide pin are to utilize injection molding method, and insulating part and center guide pin are combined as a whole.
3, the joint of a kind of coaxial cable according to claim 2 is characterized in that: described center guide pin and the embossing of insulating part contact-making surface or make the surface produce sags and crests or square.
4, the joint of a kind of coaxial cable according to claim 1 is characterized in that: described retainer ring is the phosphor bronze material.
5, the joint of a kind of coaxial cable according to claim 1 is characterized in that: the matched impedance of described center guide pin and cannulated body is 75 ohm or 50 ohm.
6, the joint of a kind of coaxial cable according to claim 1 is characterized in that: described center guide pin machines with lathe or impact style.
7, the joint of a kind of coaxial cable according to claim 1 is characterized in that: described cannulated body is finished by die casting or forging or punching press or machined into.
8, the joint of a kind of coaxial cable according to claim 1 is characterized in that: described insulating part is designed to porous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012406 CN2739822Y (en) | 2004-08-30 | 2004-08-30 | Coaxial cable joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420012406 CN2739822Y (en) | 2004-08-30 | 2004-08-30 | Coaxial cable joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2739822Y true CN2739822Y (en) | 2005-11-09 |
Family
ID=35354882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420012406 Expired - Fee Related CN2739822Y (en) | 2004-08-30 | 2004-08-30 | Coaxial cable joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2739822Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199398A (en) * | 2012-01-10 | 2013-07-10 | 镇江华坚电子有限公司 | N type impedance convertor |
| CN101026294B (en) * | 2006-02-21 | 2014-04-09 | 乔伊·姆·特拉华公司 | Indirect entry cable gland assembly |
-
2004
- 2004-08-30 CN CN 200420012406 patent/CN2739822Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026294B (en) * | 2006-02-21 | 2014-04-09 | 乔伊·姆·特拉华公司 | Indirect entry cable gland assembly |
| CN103199398A (en) * | 2012-01-10 | 2013-07-10 | 镇江华坚电子有限公司 | N type impedance convertor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |