CN103094797A - Coaxial connector and manufacturing method for the same - Google Patents
Coaxial connector and manufacturing method for the same Download PDFInfo
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- CN103094797A CN103094797A CN2012104077728A CN201210407772A CN103094797A CN 103094797 A CN103094797 A CN 103094797A CN 2012104077728 A CN2012104077728 A CN 2012104077728A CN 201210407772 A CN201210407772 A CN 201210407772A CN 103094797 A CN103094797 A CN 103094797A
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Abstract
The present invention provides a coaxial connector and a manufacturing method for the same. The manufacturing method for the coaxial connector can realize a high-frequency coaxial connector with low cost. The coaxial connector comprises the following components: a central conductor which is provided with a cylindrical area that is provided with a step part on the side surface; a cylindrical fixed resin part which is formed through insertion forming in a manner of covering the step part; and an outer conductor which surrounds the side surface of the fixed resin part. The step part is formed on the side surface of the central conductor in a shape such as recess shape. When the fixed resin part is in a temperature range of 0-150 DEG C and a frequency range below 22GHz, the relative dielectric constant is 1.9-2.1. Furthermore when the fixed resin part is in a temperature range of 320-400 DEG C, the melting viscosity based JIS K7210 is 2.0*10<4>-6.0*10<5>Pa*s.
Description
Technical field
The present invention relates to the manufacture method of coaxial connector and coaxial connector.
Background technology
For having center conductor and surround the coaxial connector of resin portion of the insulating properties of center conductor, known have by embedding be shaped to form center conductor, form thus the method (with reference to patent documentation 1, patent documentation 2 and patent documentation 3) of resin portion.Also disclose the center conductor that utilizes the bonding coaxial connector of adhesives and the structure of resin portion in patent documentation 4.
Patent documentation 1: Japanese kokai publication hei 6-76907 communique
Patent documentation 2: Japanese kokai publication hei 9-102342 communique
Patent documentation 3: TOHKEMY 2005-158656 communique
Patent documentation 4: Japanese kokai publication hei 6-275345 communique
But, in be shaped to form the existing coaxial connector of resin portion by embedding, consider to prevent with center conductor as the rotation of the resin portion of rotating shaft and resin portion center conductor axially on movement.The frequency of the signal that coaxial connector transmits raises, if the coaxial connector miniaturization, the area of the contact-making surface of the side surface of center conductor and resin portion diminishes.Its result exists the bonding force between center conductor and resin portion to weaken, resin portion rotation or mobile such problem.
Particularly, in the situation that adopt the smaller material of the such coefficient of friction of fluororesin as resin material, the other materials larger with using coefficient of friction compared as the situation of resin portion, and the frictional force between center conductor and resin portion diminishes.Its result, resin portion are easily rotated as rotating shaft with center conductor, perhaps moving axially along center conductor.If resin portion is rotated or be mobile, can produce the deteriorated such problem of electrical characteristics of coaxial connector.
As the method that prevents the resin portion rotation, the method for injecting the bonding center conductor of bonding agent and surrounding the dielectric layer of center conductor by near the minor diameter part the central portion that is arranged on center conductor is disclosed in patent documentation 4.But if adopt the structure of using bonding agent, the heat in the time of can producing because of soldering causes the such problem of bonding agent melting, and also can produce the such problem of manufacturing cost increase.
Summary of the invention
Therefore, the present invention namely completes in view of these problem points, and its purpose is to reduce makes that resin portion is difficult to rotate or the cost of mobile coaxial connector.
In order to solve above-mentioned problem, provide a kind of coaxial connector in the 1st mode of the present invention, this coaxial connector comprises: center conductor, it has the columned zone that is provided with stage portion at side surface; Columnar fixing resin section, it is shaped by embedding in the mode that covers stage portion and forms, and is fixed in above-mentioned center conductor; And external conductor, it surrounds the side surface of fixing resin section.Formation material for fixing resin section, be in more than 0 ℃ and frequency range that the temperature range below 150 ℃ and 22GHz are following in the time relative dielectric constant be more than 1.9 and below 2.1, and more than 320 ℃ and below 400 ℃ the time, be 2.0 * 10 based on the melt viscosity of JIS K7210
4Pas is above and 6.0 * 10
5Below Pas.
Stage portion is formed on the side surface of center conductor with for example being concavity.Stage portion is formed on the side surface of center conductor with also can being convex.As an example, by be formed for the impact on the electrical characteristics of coaxial connector is defined as the stage portion of the concavity of minimal shape on center conductor, and utilize the fluororesin of the stage portion that is fit to this concavity of filling to form above-mentioned resin portion, can prevent that resin portion is with respect to rotation and the movement of center conductor in the electrical characteristics of the good coaxial connector of maintenance.
Above-mentioned coaxial connector can also comprise the columnar resin portion that is pressed into, and this is pressed into resin portion and is press-fit into center conductor, and its bottom surface is contacted with the bottom surface of fixing resin section, and external conductor surrounds fixing resin section and is pressed into the side surface of resin portion.For example, fixing resin section and be pressed into resin portion and be of identical composition.Also can make the external diameter of fixing resin section identical with the external diameter that is pressed into resin portion.As an example, the coefficient of linear expansion of fixing resin section is more than or equal to 8 * 10
-5/ ℃ and less than 15 * 10
-5/ ℃.
A kind of manufacture method of coaxial connector is provided in the 2nd mode of the present invention, and this manufacture method comprises following operation: the side surface at columniform center conductor forms stage portion; Be shaped and form columnar fixing resin section in the mode that covers stage portion by embedding, and being fixed in center conductor; And the external conductor that form to surround the side surface of fixing resin section.Formation material for fixing resin section, be in more than 0 ℃ and frequency range that the temperature range below 150 ℃ and 22GHz are following in the time relative dielectric constant be more than 1.9 and below 2.1, and more than 320 ℃ and below 400 ℃ the time, be 2.0 * 10 based on the melt viscosity of JIS K7210
4Pas is above and 6.0 * 10
5Below Pas.
In addition, above-mentioned brief summary of the invention is not enumerated whole essential feature of the present invention.In addition, the combination of the pair of these feature groups also can consist of invention.
Description of drawings
Fig. 1 represents the cross section of the coaxial connector 100 of an embodiment of the invention.
Fig. 2 represents the A-A cross section of coaxial connector shown in Figure 1 100.
Fig. 3 represents the cross section of the coaxial connector 200 of another execution mode.
Fig. 4 represents the cross section of the coaxial connector 400 of another execution mode.
Fig. 5 represents the cross section of the coaxial connector 500 of another execution mode.
Fig. 6 represents the cross section of the coaxial connector 600 of another execution mode.
Fig. 7 represents the cross section of the coaxial connector 700 of another execution mode.
Fig. 8 represents the result that the frequency characteristic to the return loss of coaxial connector 400 is measured out.
Fig. 9 represents the result that the frequency characteristic to the return loss of coaxial connector B is measured out.
Figure 10 represents the return loss of the coaxial connector 400 under the following frequency of 6GHz and the return loss of coaxial connector B.
Embodiment
Below, by the working of an invention mode, the present invention is described, but following execution mode and be not used in and limit the related invention of claims.Whole combinations of the feature that illustrates in execution mode in addition, may not be essential for the solution of invention.
Fig. 1 represents the cross section of the coaxial connector 100 of an embodiment of the invention.Fig. 2 represents the A-A cross section of coaxial connector shown in Figure 1 100.Coaxial connector 100 comprises center conductor 102, fixing resin section 104 and external conductor 106.As shown in Figure 2, in this manual, the external diameter of center conductor 102 is expressed as d, the external diameter of fixing resin section 104 is expressed as D.
Insert the plug terminal of convex coaxial connector in hollow part 110.Hollow part 110 is for example that the end from center conductor 102 is and removes the zone that metal forms cylindricly.The regional cylindrical shape that is formed with hollow part 110 of center conductor 102.Fluting section 112 is formed on the part in the drum zone that is formed with hollow part 110 in center conductor 102.Owing to forming fluting section 112 in center conductor 102, thereby the zone of the drum of center conductor 102 has mobility, so the adaptation rising between this center conductor 102 and the convex coaxial connector that is inserted in hollow part 110.
The side surface of center conductor 102 in cylindric zone has stage portion 108.Center conductor 102 also can have a plurality of stage portion 108.Stage portion 108 forms for example concavity.Stage portion 108 is formed on the side surface of center conductor 102 with also can being convex.Because the stage portion 108 of concavity can form by turning centre conductor 102, therefore, to compare with the stage portion 108 that forms convex, the stage portion 108 of this concavity can form by lower cost.
As shown in Figure 2, stage portion 108 is cut as for example rectangular-shaped.Stage portion 108 both can form by the cutting of D shape, also can process by annular knurl to form.Stage portion 108 also can be cut and be hemispherical, ellipticity and other shape arbitrarily.
By fixing resin section 104 is filled in stage portion 108, also can prevent fixing resin section 104 moving axially along center conductor 102.Specifically, want to make fixing resin section 104 along the axially movable power of center conductor 102 in the situation that applied, the fixing resin section 104 that can utilize internal face in stage portion 108 and axial vertical direction center conductor 102 to stop to be filled in stage portion 108 moves.
In order to improve for stoping fixing resin section's 104 rotations or mobile effect, preferably, the internal face of stage portion 108 forms along the direction substantially vertical with the side surface of center conductor 102.More preferably, two relative internal faces of stage portion 108 are formed on along with the side surface away from center conductor 102 goes and mutual distance becomes on large direction.
For fixing resin section 104, as an example, more than 0 ℃ and in the temperature below 150 ℃ and the frequency below 100GHz, the relative dielectric constant of fixing resin section 10 is more than 1.9 and below 2.1.Fixing resin section 104 can be also that the relative dielectric constant under the following frequency of 22GH z is more than 1.9 and below 2.1.Relative dielectric constant by making fixing resin section 104 is more than 1.9 and below 2.1, in the situation that coaxial connector 100 is fit to the SMA specification, the characteristic impedance of coaxial connector 100 is that 48 Ω are above and below 52 Ω.In the situation that characteristic impedance be not in 48 Ω more than and in the scope below 52 Ω, the pulse characteristic equifrequent characteristic degradation of the return loss (return loss) in the combination of coaxial connector 100 and external equipment.
Specifically, when the relative dielectric constant that the external diameter that is made as D, center conductor 102 at the internal diameter with external conductor 106 is made as d, fixing resin section 104 was made as ε, the characteristic impedance Z of coaxial connector 100 was by Z=138/ ε
0.5* Log(D/d) determine.In the situation that D=4.11mm, d=1.27mm, ε=1.9, Z=51.06 Ω.In the situation that D=4.11mm, d=1.27mm, ε=2.0, Z=49.77 Ω.In the situation that D=4.11mm, d=1.27mm, ε=2.1, Z=48.57 Ω.
That is, in the situation that the relative dielectric constant of fixing resin section 104 is more than 1.9 and below 2.1, needn't be as adopting dielectric constant to adjust characteristic impedance by form the hole in resin greater than the situation of 2.1 resin.Thereby, by being more than 1.9 to relative dielectric constant and 2.1 following resins embed and form fixing resin section 104, can be with low cost fabrication coaxial connector 100.
The formation material of fixing resin section 104 is for example fluororesin.Fixing resin section 104 can be also other resins with the modulus of elasticity in comperssion identical with fluoro resin, coefficient of friction, coefficient of linear expansion.Preferred fixing resin section 104 has cementability.Fixing resin section 104 is for example the copolymer of tetrafluoroethene and perfluoroalkyl vinyl ether.Fixing resin section 104 can be also PFA (PFA).
For example, the formation material of fixing resin section 104 is more than or equal to 0.04, less than 0.05 with respect to the confficient of static friction of polish copper.The confficient of static friction of fluororesin is lower than the confficient of static friction of other most resins.Thereby, when adopting fluororesin in fixing resin section 104, the 104 easily rotations or mobile of fixing resin section.Therefore, by filling fixing resin section 104 in stage portion 108, show significantly rotation or the mobile effect that prevents fixing resin section 104.
For the formation material of fixing resin section 104, preferably, melt viscosities that measure based on JIS K7210, more than 320 ℃ and below 400 ℃ the time are 2.0 * 10
4Pas is above and 6.0 * 10
5Below Pas.For the formation material of fixing resin section 104, more preferably, melt viscosities that measure based on JIS K7210,380 ℃ the time are 2.0 * 10
4Pas is above and 2.5 * 10
5Below Pas, more preferably 2.0 * 10
4Pas is above and 5.0 * 10
4Below Pas.The melt viscosity of fixing resin section 104 more preferably 2.0 * 10
4Pas is above and 2.5 * 10
5Below Pas.The melt viscosity that has in this scope due to fixing resin section 104, therefore can be shaped by embedding forms fixing resin section 104.
Particularly, the melt viscosity of the formation material of fixing resin section 104 is less, more can fill fixing resin section 104 in the stage portion 108 of less concavity.According to the calculating formula of above-mentioned characteristic impedance obviously as can be known, the impact that in the situation that stage portion 108 is less, the characteristic impedance of coaxial connector 100 is produced is less.Thereby, because the formation material of fixing resin section 104 has above-mentioned melt viscosity, thereby can prevent rotation or the movement of fixing resin section 104, will be down to Min. to the impact that characteristic impedance produces simultaneously.
As an example, the coefficient of linear expansion of measuring based on ASTM D696 of the formation material of fixing resin section 104 more than 50 ℃ and in the temperature range below 100 ℃ more than or equal to 8 * 10
-5/ ℃, less than 15 * 10
-5/ ℃.More preferably, the formation material of fixing resin section 104 has 11.8 * 10 more than 20 ℃ and in the temperature range below 100 ℃
-5/ ℃ more than and 12.2 * 10
-5/ ℃ below coefficient of linear expansion.The formation material of fixing resin section 104 for example has more than 4.00% and 4.06% following shaping shrinkage rate.Because the formation material of fixing resin section 104 has above-mentioned coefficient of linear expansion or shaping shrinkage rate, therefore utilize fixing resin section 104 embed be shaped after the contraction of generations make fixing resin section 104 be sealed at center conductor 102.
As an example, the formation material of fixing resin section 104 to measure by means of differential scanning calorimetry the fusing point that (DSC) obtain be more than 265 ℃.More preferably, the fusing point that has more than 300 ℃ of fixing resin section 104.Because the formation material of fixing resin section 104 has this fusing point, therefore in the situation that with coaxial connector 100 solderings in external substrate, fixing resin section 104 can melting.
More than the modulus of elasticity in comperssion based on ASTM D 895 measurements of the formation material of fixing resin section 104 is preferably 400MPa and below 500MPa.Because the formation material of fixing resin section 104 has this modulus of elasticity in comperssion, so fixing resin section 104 is shaped by embedding under the prerequisite that can not rupture because of thermal contraction and forms.And, because the formation material of fixing resin section 104 has above-mentioned modulus of elasticity in comperssion, thereby fixing resin section 104 after being filled into stage portion 108 with stage portion 108 driving fits, therefore improved fixing resin section 104 with respect to rotation and mobile load-bearing capacity.
The size of the side surface of the degree of depth of stage portion 108 and center conductor 102 is for example determined according to the relation with respect between the melt viscosity of rotation and mobile load-bearing capacity and fixing resin section 104 of the electrical characteristics take the characteristic impedance of coaxial connector 100 as representative, fixing resin section 104.The degree of depth and size when specifically, stage portion 108 characteristic impedance that is defined as coaxial connector 100 is in the scope that 48 Ω are above and 52 Ω are following.
The degree of depth of stage portion 108 also can be determined according to the external diameter of center conductor 102.As an example, the external diameter of conductor 102 below 16% centered by the degree of depth of stage portion 108.The degree of depth of stage portion 108 is more preferably below 10% of external diameter of center conductor 102.The degree of depth of stage portion 108 also can be further determined according to the relative dielectric constant of the internal diameter of fixing resin section 104 and fixing resin section 104.
In the situation that stage portion 108 is cuboids, under the melt viscosity that is in the fixing resin section 104 when being shaped the temperature that forms fixing resin section 104 by embedding, the distance between the relative internal face of stage portion 108 and the degree of depth of stage portion 108 are minimum range and above distance and degree of depth of minimum-depth that fixing resin section 104 is filled in stage portion 108.In the situation that stage portion 108 is the shapes outside cuboid, determine that by making this shape approximation cuboid distance and the degree of depth between the internal face of stage portion 108 get final product.
By the fixing resin section 104 of filling above-mentioned melt viscosities to stage portion 108, can access sufficient fixing resin section 104 with respect to rotation and mobile load-bearing capacity.For example, the axial pulling intensity of fixing resin section 104 is greater than 1N.More than the axial pulling intensity of fixing resin section 104 is preferably 10N, more preferably more than 25N.
As mentioned above, when the relative dielectric constant that the external diameter that is made as D, center conductor 102 at the internal diameter with external conductor 106 is made as d, fixing resin section 104 was made as ε, the characteristic impedance Z of coaxial connector 100 was by Z=138/ ε
0.5* Log(D/d) determine.Thereby the internal diameter in the zone that is formed with stage portion 108 of center conductor 102 is less than the internal diameter in the zone that is not formed with stage portion 108.Its result, the characteristic impedance of coaxial connector 100 is greater than the situation that does not form stage portion 108.
If in the situation that coaxial connector 100 has the structure during preshaped resin portion is pressed into center conductor 102, form protuberance in order to prevent this resin portion rotation at center conductor 102.In order this resin portion to be pressed into to center conductor 102 and to be prevented the effect of this resin portion rotation, need to form the protuberance of the height in the tolerance of considering the resin portion after shaping and the gap between center conductor 102 and resin portion.Thereby, in target zone, can produce the problem of internal diameter in zone of the part of the external diameter in zone of the part that must increase resin portion and center conductor 102 for the characteristic impedance that makes coaxial connector 100.
To this, in the situation that be shaped to form fixing resin section 104 by embedding, compare with preshaped resin portion is pressed into to the situation of center conductor 102, can reduce to prevent the rotation of fixing resin section 104 or the difference in height of mobile needed stage portion 108.Thereby, by form fixing resin section 104 by embedding, can be according to the relative dielectric constant of the internal diameter of the external diameter of center conductor 102, fixing resin section 104 and fixing resin section 104, it is more than 48 Ω and in the scope below 52 Ω that the degree of depth of stage portion 108 is made as the characteristic impedance that makes coaxial connector 100.That is, according to the structure of present embodiment, can prevent rotation or the movement of fixing resin section 104, and can be shaped by embedding and make the coaxial connector 100 of impedance operator excellence with low cost.
In addition, also can form on the internal face of stage portion 108 concavo-convex.Due to stage portion 108 be used for carry out bonding area and become large, therefore, further improved the rotation or the mobile effect that stop fixing resin section 104.
Below, the manufacture method of coaxial connector 100 is described.At first, the regional area of the side surface by turning centre conductor 102 forms stage portion 108.Next, the center conductor 102 that will be formed with stage portion 108 is filled in mould, and being shaped by embedding forms fixing resin section 104 in the mode that covers stage portion 108.The fixing resin section 104 that then, will embed after shaping is pressed into to preshaped external conductor 106.As mentioned above, manufacture method according to the coaxial connector 100 of present embodiment, can utilize and compare less operation with fixing resin section 104 being pressed into to the method for center conductor 102, make fixing resin section 104 with low cost and can not rotate or mobile coaxial connector 100.
As shown in Figure 1, when also being shaped when forming fixing resin section 104 by embedding in the peripheral region of fluting section 112, in order to prevent from filling fixing resin section 104 in the space of fluting section 112, also can be shaped by embedding form the operation of fixing resin section 104 before, arrange the operation that is used for preventing the member that resin flows into to fluting section 112 be installed.In this case, after the operation that forms fixing resin section 104 of being shaped by embedding finishes, remove be used to the member that prevents that resin from flowing into.
Fig. 3 represents the cross section of the coaxial connector 200 of another execution mode.Coaxial connector 200 is the coaxial connectors with the convex of coaxial connector shown in Figure 1 100 combinations.Coaxial connector 200 comprises center conductor 202, fixing resin section 204, external conductor 206, convex terminal 214 and joint portion 216.
Identical with center conductor 102, center conductor 202 is the metals with conductivity.As an example, center conductor 202 has columned zone.The side surface of center conductor 202 in columned zone has stage portion 208.Stage portion 208 has shape and the function that is equal to stage portion 108.
Fixing resin section 204 has function and the shape that is equal to fixing resin section 104.Be shaped by embedding and form fixing resin section 204 in the mode that covers stage portion 208 and surround center conductor 202.
In coaxial connector 200, fixing resin section 204 is shaped by embedding and forms in the mode that covering is arranged at the stage portion 208 of center conductor 202.Thereby, according to the structure of coaxial connector 200, can prevent equally fixing resin section's 204 rotations or mobile with coaxial connector 100, and the characteristic impedance of coaxial connector 200 is in the scope of desired value.
Fig. 4 represents the cross section of the coaxial connector 400 of another execution mode.Be with the difference of coaxial connector 100 shown in Figure 1, the coaxial connector 400 in this figure has fixing resin section 404 and is pressed into resin portion 405.
Fixing resin section 404 is shaped by embedding and forms in the mode that covers stage portion 108 accordingly with fixing resin section 104.Being pressed into resin portion 405 forms cylindric by shaping or cutting in advance.Be pressed into resin portion 405 and be press-fit into center conductor 102, and its bottom surface is contacted with the bottom surface of fixing resin section 404.
Because coaxial connector 400 has fixing resin section 404 and is pressed into resin portion 405, therefore produced not the effect of the member that need to be provided for preventing resin inflow fluting section 112 before the operation that forms fixing resin section 404 that is shaped by embeddings.In addition, also can realize being pressed into the length of resin portion 405 and can finely tuning so unpredictable effect to the characteristic impedance of coaxial connector 400 by change.
As an example, be pressed into resin portion 405 than fluting section 112 center conductor 102 axially on length long.Be pressed into resin portion 405 also can than hollow part 110 center conductor 102 axially on length long.Preferably, the opposite bottom surface, the bottom surface with being contacted with fixing resin section 404 that is pressed in resin portion 405 is positioned at the plane identical with the end face of center conductor 102.
Preferred fixing resin section 404 and be pressed into resin portion 405 and be of identical composition.Due to fixing resin section 404 be pressed into resin portion 405 and be of identical composition, so coaxial connector 400 can have the characteristic impedance that is equal to coaxial connector 100.
Preferred fixing resin section 404 and be pressed into resin portion 405 and have identical external diameter.Further preferred fixing resin section 404 and be pressed into resin portion 405 and have identical internal diameter.Due to fixing resin section 404 be pressed into resin portion 405 and have identical external diameter or internal diameter, thus externally the inner surface of conductor 106 arrange concavo-convex, therefore can be with low cost fabrication coaxial connector 400.And, in the situation that fixing resin section 404 is identical with the external diameter that is pressed into resin portion 405, can prevent at fixing resin section 404 and place, the joint portion reflection high-frequency signal that is pressed into resin portion 405.Thereby, can prevent that the transmission characteristic of the signal of transmission in coaxial connector 400 is deteriorated.
Preferably, the modulus of elasticity in comperssion of measuring based on ASTM D 895 of fixing resin section 404 and the formation material that is pressed into resin portion 405 is more than 400MPa and below 500MPa.Because the formation material of fixing resin section 404 has this modulus of elasticity in comperssion, therefore produced the bottom surface of fixing resin section 404 and risen with adaptation between the bottom surface that is pressed into resin portion 405, and be easy to fixing resin section 404 be pressed into resin portion 405 and be pressed into to the effect of external conductor 106.As a result, compare with the situation of the resin that adopts the modulus of elasticity in comperssion less than above-mentioned modulus of elasticity in comperssion, can reduce the machining accuracy that is pressed into resin portion 405.
Be with the difference of the manufacture method of coaxial connector 100, the manufacture method of coaxial connector 400 is the resin portion 405 that is pressed into preshaped or that cutting forms to be pressed into to center conductor 102 after forming fixing resin section 404 being shaped by embedding.Also can will be pressed into resin portion 405 be pressed into before in the bottom surface of fixing resin section 404 or be pressed into adhesive-applying on the bottom surface of resin portion 405.By in fixing resin section 404 and be pressed between resin portion 405 and fill bonding agent, can further improve fixing resin section 404 and be pressed into the adaptation of 405 of resin portion.
Fig. 5 represents the cross section of the coaxial connector 500 of another execution mode.Be with the difference of coaxial connector 200 shown in Figure 3, the coaxial connector 500 in this figure has fixing resin section 504 and is pressed into resin portion 505.
Fixing resin section 504 and be pressed into resin portion 505 and shown in Figure 4 fixing resin section 404 and to be pressed into resin portion 405 corresponding.That is, fixing resin section 504 is shaped by embedding and forms in the mode that covers stage portion 208, and, be pressed into resin portion 505 and be press-fit into center conductor 202 in the mode that is contacted with fixing resin section 504.Preferably, be pressed into resin portion 505 center conductor 202 axially on the boundary face position of endface position and center conductor 202 and convex terminal 214 identical.
Fig. 6 represents the cross section of the coaxial connector 600 of another execution mode.Be with the difference of coaxial connector 400 shown in Figure 4, the center conductor 602 of the coaxial connector 600 in this figure has hollow part 610, hollow part 611, fluting section 612 and fluting section 613, and be provided with surround center conductor 602 be pressed into resin portion 614.Center conductor 602 has the stage portion 608 that resin portion of being fixed 404 is surrounded.External conductor 606 surrounds fixing resin section 404, is pressed into resin portion 405 and is pressed into resin portion 614.
One of the bottom surface that is pressed into resin portion 614 contacts with the bottom surface of fixing resin section 404.Be pressed into resin portion 614 and be for example with fixing resin section 404 and be pressed into the identical material of resin portion 405.The external diameter of the external diameter that preferably is pressed into resin portion 614 and fixing resin section 404 and to be pressed into the external diameter of resin portion 405 identical.
As an example, be pressed into resin portion 614 and be press-fit into center conductor 602 after forming fixing resin section 404 and form being shaped by embedding.As an example, be pressed into resin portion 614 and be pressed into resin portion 405 and be press-fit into simultaneously center conductor 602.Be pressed into resin portion 614 and both can be press-fit into center conductor 602 before being pressed into resin portion 405, also can be pressed into to center conductor 602 after being pressed into resin portion 405.
Fig. 7 represents the cross section of the coaxial connector 700 of another execution mode.Be with the difference of coaxial connector 500 shown in Figure 5, the center conductor 702 of the coaxial connector 700 in this figure has hollow part 711 and fluting section 713, and be provided with surround center conductor 702 be pressed into resin portion 714.Center conductor 702 has the stage portion 708 that resin portion of being fixed 504 is surrounded.External conductor 706 surrounds fixing resin section 504, is pressed into resin portion 505 and is pressed into resin portion 714.
One of the bottom surface that is pressed into resin portion 714 contacts with the bottom surface of fixing resin section 504.Be pressed into resin portion 714 and be for example with fixing resin section 504 and be pressed into the identical material of resin portion 505.The external diameter of the external diameter that preferably is pressed into resin portion 714 and fixing resin section 504 and to be pressed into the external diameter of resin portion 505 identical.
As an example, be pressed into resin portion 714 and be press-fit into center conductor 702 after forming fixing resin section 504 and form being shaped by embedding.As an example, be pressed into resin portion 714 and be pressed into resin portion 505 and be press-fit into simultaneously center conductor 702.Be pressed into resin portion 714 and both can be press-fit into center conductor 702 before being pressed into resin portion 505, also can be press-fit into center conductor 702 after being pressed into resin portion 505.
Make the coaxial connector of the structure that is equal to coaxial connector 400 shown in Figure 4.Use the copolymer of tetrafluoroethene and perfluoroalkyl vinyl ether that is fluororesin as the formation material of fixing resin section 404.
Be 0.045 at confficient of static friction, in the frequency below 22GHz, the relative dielectric constant based on ASTM D 150 of fluoro resin used in the present invention when 23 ℃ and 150 ℃ is respectively 2.03 and 2.01, fusing point based on D S C is more than 300 ℃ and below 310 ℃, is 12 * 10 based on the coefficient of linear expansion of ASTM D 696
-5/ ℃, be 550MPa based on the modulus of elasticity in comperssion of ASTM D 895, the melt viscosity based on JIS K7210 in the time of 380 ℃ is 2.7 * 10
4Pas.
At first, prepare the center conductor 102 of d=1.27mm.Next, form stage portion 108 on center conductor 102.Stage portion 108 center conductor 102 axially on length be 1.2mm.Stage portion 108 with the axial vertical direction of center conductor 102 on length be 0.93mm.The degree of depth of stage portion 108 is 0.2mm.The degree of depth of stage portion 108 is 15.7% with respect to the ratio of the external diameter of center conductor 102.
Then, make after center conductor 102 is filled to mould during fluoro resin flow into mould, being shaped by embedding forms fixing resin section 404.The D outer diameter of fixing resin section 404 is made as 4.11mm.
Then, be pressed into to center conductor 102 for the columnar resin portion 405 that is pressed into preshaped.For being pressed into resin portion 405, also use the fluororesin identical with fixing resin section 404.The external diameter that is pressed into resin portion 405 also is made as 4.11mm.At last, the fixing resin section 404 that will form as one with center conductor 102 and be pressed into resin portion 405 and be pressed into to external conductor 106 completes coaxial connector 400.
Fig. 8 represents the result that the frequency characteristic to the return loss of the coaxial connector 400 of making is measured out.Return loss shown in Figure 8 is that coaxial connector 400 actual installation are being measured under the state of printed circuit board (PCB).When voltage standing wave ratio was made as VSWR, the return loss RL of coaxial connector 400 was by RL=20log
10(VSWR+1/VSWR-1) (dB) provide, in the frequency f below 22GHz (GHz), as an example of SMA specification, VSWR is 1.05+0.015 * f.
Measure by pulling center conductor 102 under the state that is fixed with fixing resin section 404 in the coaxial connector 400 of making the easy degree that fixing resin section 404 moves.Power with 27N in coaxial connector 400 pulls center conductor 102, and center conductor 102 moves thus.
Comparative example
Except center conductor 102 does not have stage portion 108 these points, the coaxial connector A that the coaxial connector 400 of making and above-described embodiment 1 made is equal to.When pulling center conductor 102 under the state that is being fixed with fixing resin section 404, center conductor 102 moved in the moment of the power that applies 1N.According to this result, can confirm that center conductor 102 has the effect of stage portion 108.
Reference example
The structure that is equal to the coaxial connector 400 with embodiment 1 made is produced on the coaxial connector B that uses polyester resin (following as LCP) in fixing resin section 404.In the relative dielectric constant based on ASTM D150 was frequency range below 10GHz, LCP used in the present invention was more than 3.8 and below 4.5, and modulus of elasticity in comperssion is 11700MPa.
Fig. 9 represents the result that the frequency characteristic to the return loss of coaxial connector B is measured out.Return loss shown in Figure 9 is also that coaxial connector B actual installation is being measured under the state of printed circuit board (PCB).Can be clear and definite according to Fig. 9, to compare with the measurement result of coaxial connector 400 shown in Figure 8, the frequency characteristic of return loss worsens.
The return loss of the coaxial connector 400 when Figure 10 represents to be in the following frequency of 6GHz and the return loss of coaxial connector B.Return loss in Figure 10 is coaxial connector 400 and coaxial connector B actual installation not to be measured under the state of printed circuit board (PCB).Can be clear and definite according to this figure, the return loss of coaxial connector 400 can access good characteristic less than the return loss of coaxial connector B.
Above, utilize execution mode that the present invention has been described, but technical scope of the present invention is not limited to the described scope of above-mentioned execution mode.It will be apparent to one skilled in the art that and to apply diversified change or improvement to above-mentioned execution mode.Can be clear and definite according to the record of claim part, applied the technical scheme that this type of change or improvement form and be also included in the technical scope of the present invention.
Should be noted that, execution sequence that each in claims, specification and accompanying drawing in represented method processed as long as no express especially " forward ", " ... before " etc., and do not use the output of pre-treatment in reprocessing, just can realize in any order.About the motion flow in claims and specification, even in order conveniently to use " at first ", " following " etc. to be illustrated, also do not represent and sequentially to implement according to this.
Description of reference numerals
100, coaxial connector; 102, center conductor; 104, fixing resin section; 106, external conductor; 108, stage portion; 110, hollow part; 112, fluting section; 200, coaxial connector; 202, center conductor; 204, fixing resin section; 206, external conductor; 208, stage portion; 214, convex terminal; 216, joint portion; 400, coaxial connector; 402, center conductor; 408, stage portion; 414, convex terminal; 400, coaxial connector; 404, fixing resin section; 405, be pressed into resin portion; 500, coaxial connector; 504, fixing resin section; 505, be pressed into resin portion; 600, coaxial connector; 606, external conductor; 602, center conductor; 608, stage portion; 610, hollow part; 611, hollow part; 612, fluting section; 613, fluting section; 614, be pressed into resin portion; 700, coaxial connector; 702, center conductor; 706, external conductor; 708, stage portion; 711, hollow part; 713, fluting section; 714, be pressed into resin portion.
Claims (10)
1. coaxial connector comprises:
Center conductor, it has the columned zone that is provided with stage portion at side surface;
Columnar fixing resin section, it is shaped by embedding and forms in the mode that covers above-mentioned stage portion, and is fixed in above-mentioned center conductor; And
External conductor, it surrounds the side surface of above-mentioned fixing resin section;
Formation material for above-mentioned fixing resin section, be in more than 0 ℃ and frequency range that the temperature range below 150 ℃ and 22GHz are following in the time relative dielectric constant be more than 1.9 and below 2.1, and more than 320 ℃ and below 400 ℃ the time, be 2.0 * 10 based on the melt viscosity of JIS K7210
4Pas is above and 6.0 * 10
5Below Pas.
2. coaxial connector according to claim 1, wherein,
Above-mentioned stage portion is formed on the side surface of above-mentioned center conductor with being concavity.
3. coaxial connector according to claim 1 and 2, wherein,
This coaxial connector also comprises the columnar resin portion that is pressed into, and this columnar resin portion that is pressed into is press-fit into above-mentioned center conductor, and the bottom surface is contacted with the bottom surface of above-mentioned fixing resin section,
Said external conductor surrounded above-mentioned fixing resin section and the above-mentioned side surface that is pressed into resin portion.
4. coaxial connector according to claim 3, wherein,
Above-mentioned fixing resin section and the above-mentioned resin portion that is pressed into are of identical composition.
5. coaxial connector according to claim 3, wherein,
The external diameter of above-mentioned fixing resin section is identical with the above-mentioned external diameter that is pressed into resin portion.
6. coaxial connector according to claim 1 and 2, wherein,
The coefficient of linear expansion of above-mentioned fixing resin section is more than or equal to 8 * 10
-5/ ℃ and less than 15 * 10
-5/ ℃.
7. the manufacture method of a coaxial connector comprises following operation:
Side surface at columniform center conductor forms stage portion;
The mode that is shaped to cover above-mentioned stage portion by embedding forms columnar fixing resin section, and is fixed in above-mentioned center conductor; And
The external conductor of the side surface of the above-mentioned fixing resin of formation encirclement section;
Formation material for above-mentioned fixing resin section, be in more than 0 ℃ and frequency range that the temperature range below 150 ℃ and 22GHz are following in the time relative dielectric constant be more than 1.9 and below 2.1, and more than 320 ℃ and below 400 ℃ the time, be 2.0 * 10 based on the melt viscosity of JIS K7210
4Pas is above and 6.0 * 10
5Below Pas.
8. the manufacture method of coaxial connector according to claim 7, wherein,
In the operation that forms above-mentioned stage portion, form the above-mentioned stage portion of concavity at the side surface of above-mentioned center conductor.
9. the manufacture method of according to claim 7 or 8 described coaxial connectors, wherein,
This manufacture method also comprises following operation:
The mode that is contacted with the bottom surface of above-mentioned fixing resin section with the bottom surface is pressed into the columnar resin portion that is pressed into to above-mentioned center conductor,
In the operation that forms the said external conductor, to surround above-mentioned fixing resin section and the above-mentioned mode that is pressed into the side surface of resin portion forms the said external conductor.
10. the manufacture method of coaxial connector according to claim 9, wherein,
In the above-mentioned operation that is pressed into, the above-mentioned resin portion that is pressed into that will have the composition identical with above-mentioned fixing resin section is pressed into to above-mentioned center conductor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-242527 | 2011-11-04 | ||
| JP2011242527A JP4902018B1 (en) | 2011-11-04 | 2011-11-04 | Coaxial connector and manufacturing method of coaxial connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103094797A true CN103094797A (en) | 2013-05-08 |
Family
ID=46060708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104077728A Pending CN103094797A (en) | 2011-11-04 | 2012-10-23 | Coaxial connector and manufacturing method for the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4902018B1 (en) |
| CN (1) | CN103094797A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106611910A (en) * | 2015-10-23 | 2017-05-03 | 泰科电子(上海)有限公司 | Electrical connector |
| CN110911909A (en) * | 2018-09-14 | 2020-03-24 | 广濑电机株式会社 | Coaxial connector assembly |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834687A (en) * | 2016-04-26 | 2016-08-10 | 苏州昭沃五金科技有限公司 | Machining process for square plate shell |
| JP7147796B2 (en) * | 2020-02-27 | 2022-10-05 | Smk株式会社 | connector |
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| JPH0237470U (en) * | 1988-08-31 | 1990-03-12 | ||
| JPH06275345A (en) * | 1992-11-05 | 1994-09-30 | Waka Seisakusho:Kk | High-frequency coaxial connector |
| JP2005158656A (en) * | 2003-11-28 | 2005-06-16 | I-Pex Co Ltd | Method of manufacturing connector for coaxial cable |
| CN201708382U (en) * | 2010-07-09 | 2011-01-12 | 陕西华达通讯技术有限公司 | Minitype inter-plate blind-mating radio frequency connector |
| CN201789182U (en) * | 2010-08-20 | 2011-04-06 | 常州市新盛电器有限公司 | Radio frequency coaxial connector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5587672U (en) * | 1978-12-12 | 1980-06-17 | ||
| JPH0475271A (en) * | 1990-07-17 | 1992-03-10 | Shinko Electric Ind Co Ltd | Receptacle of coaxial connector |
-
2011
- 2011-11-04 JP JP2011242527A patent/JP4902018B1/en not_active Expired - Fee Related
-
2012
- 2012-10-23 CN CN2012104077728A patent/CN103094797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0237470U (en) * | 1988-08-31 | 1990-03-12 | ||
| JPH06275345A (en) * | 1992-11-05 | 1994-09-30 | Waka Seisakusho:Kk | High-frequency coaxial connector |
| JP2005158656A (en) * | 2003-11-28 | 2005-06-16 | I-Pex Co Ltd | Method of manufacturing connector for coaxial cable |
| CN201708382U (en) * | 2010-07-09 | 2011-01-12 | 陕西华达通讯技术有限公司 | Minitype inter-plate blind-mating radio frequency connector |
| CN201789182U (en) * | 2010-08-20 | 2011-04-06 | 常州市新盛电器有限公司 | Radio frequency coaxial connector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106611910A (en) * | 2015-10-23 | 2017-05-03 | 泰科电子(上海)有限公司 | Electrical connector |
| CN106611910B (en) * | 2015-10-23 | 2019-07-02 | 泰科电子(上海)有限公司 | Electric connector |
| CN110911909A (en) * | 2018-09-14 | 2020-03-24 | 广濑电机株式会社 | Coaxial connector assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4902018B1 (en) | 2012-03-21 |
| JP2013098131A (en) | 2013-05-20 |
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Application publication date: 20130508 |