JP2012129103A - Coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial connector with an excellent impedance characteristic.SOLUTION: The coaxial connector comprises a female connector 10 including a female housing 10H, a female outer terminal 10To provided in the female housing 10H, a female inner terminal 10Ti provided in the female outer terminal 10To, and a dielectric body 10D provided between the female outer terminal 10To and the female inner terminal 10Ti; and a male connector 20 including a male housing 20H, a male outer terminal 20To provided in the male housing 20H, and a male inner terminal 20Ti provided in the male outer terminal 20To. The female housing 10H and the dielectric body 10D are integrally molded, and a shield on the entire periphery of a contact portion of the female inner terminal 10Ti and the male inner terminal 20Ti is constituted by a semi-cylindrical part of the male outer terminal 20To and a semi-cylindrical part of the female outer terminal 10To.

Description

  The present invention relates to a coaxial connector that is used for, for example, transmission of a high-frequency signal between electrical components mounted on an automobile and is required to have excellent high-frequency characteristics, and in particular, the number of components can be reduced, and The present invention relates to a coaxial connector excellent in high frequency characteristics in which backlash between parts is eliminated and coaxiality is matched.

As a coaxial connector having a high shielding property and an excellent high frequency characteristic, for example, a connector described in Patent Document 1 is known. The coaxial connector described in Patent Document 1 is a coaxial connector in which a shield terminal described below is accommodated in a connector housing. The shield terminal accommodates an inner conductor terminal and a dielectric in an outer conductor terminal body, and The dielectric housing part that forms a part of the outer conductor terminal main body has a projecting piece projecting from the dielectric insertion port side end thereof on the dielectric housing side. Are bent in the dielectric insertion direction to form a spring piece.
With such a configuration, a shield connector having high shielding properties and excellent high-frequency characteristics was obtained.

JP 2008-192474 A

<Problems of conventional devices>
However, the coaxial connector described in Patent Document 1 has a large number of parts and a large backlash. Therefore, the problem is that the axes of each part are difficult to align and the high-frequency performance is poor, and the number of parts is large and the backlash is large. There is a problem that the terminal is bent at the time, so the terminal is bent due to the terminal and the connector insertion force is increased, and the number of parts is large, so that the assembling property at the time of assembling the parts is deteriorated. .

<Object of the present invention>
The present invention was made in order to solve the above-mentioned drawbacks, reduce the number of parts, make it easy to align the axes of each part, good high-frequency characteristics, eliminate the stuffiness at the time of connector fitting, connector insertion force is small, An object of the present invention is to provide a coaxial connector that is easy to assemble when assembling components.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The first invention of the present application is a female housing, a female outer terminal provided in the female housing, and a female inner terminal provided in the female outer terminal. A female connector comprising: a terminal; and a dielectric provided between the female outer terminal and the female inner terminal;
A male connector comprising a male housing, a male outer terminal provided in the male housing, and a male inner terminal provided in the male outer terminal;
A coaxial connector comprising:
The female housing and the dielectric are integrally formed,
By forming the vicinity of the fitting outer end of the female outer terminal in a semi-cylindrical portion and forming the vicinity of the fitting outer end of the male outer terminal in a semi-cylindrical portion, the female inner terminal and the male inner terminal The shield of the entire circumference of the contact portion is constituted by a semi-cylindrical portion of the male outer terminal and a semi-cylindrical portion of the female outer terminal.

  Further, the second invention is the coaxial connector according to the first invention, wherein the male housing is a printed circuit board (PCB), the male outer terminal is bent at 90 degrees, and a peg is formed outside thereof. It is characterized by providing.

  According to the first invention, since the number of parts is reduced, the axes of the parts are easily aligned and the high frequency performance is improved. In addition, since the number of parts has been reduced, the cause of sticking at the time of connector fitting has been eliminated, so there is no bending of the terminal due to terminal sticking, a small connector insertion force, and a coaxial connector with good assembling at the time of parts assembly. can get.

  According to the second invention, an SMD (surface mount type) connector can be easily obtained by providing a peg outside the male outer terminal.

FIG. 1 is a perspective view (A) of a coaxial connector according to the present invention and a front view (B) viewed from the male housing side. FIG. 2 is an AA arrow view of FIG. 3A and 3B are views for explaining the male connector constituting the coaxial connector according to the present invention. FIG. 3A is a perspective view of the entire male connector, FIG. 3B is a front view of the male connector, and FIG. It is a BB arrow line view. 4 is a perspective view of the male connector of FIG. 3 (A) and a perspective view of the outer terminal of FIG. 3 (C). 5A and 5B are diagrams illustrating the outer terminal, in which FIG. 5A is a perspective view of the coaxial connector of FIG. 1A with the housing removed from the perspective view, and FIG. 5B is a perspective view of FIG. 5A. FIG. 5B is a perspective view depicting only the outer terminal (figure in which the female outer terminal and the male outer terminal are fitted) by removing the coaxial line, the dielectric, and the male and female inner terminals from the figure. It is a side view of the fitting state of a female outer terminal and a male outer terminal. FIG. 6 is a longitudinal cross-sectional view illustrating the fitting of the male-female connector, which is a coaxial connector according to the present invention, (1) during fitting between housings, (2) during fitting between terminals, (3) These are each longitudinal cross-sectional views of a complete fitting state.

  Next, in the present invention, the number of parts is reduced to facilitate the alignment of the axes of each part, the high frequency performance is good, the connector insertion force is reduced by eliminating the stuffiness at the time of connector fitting, and the assemblability at the time of parts assembly is good. Such a coaxial connector will be described with reference to FIGS.

<Configuration of coaxial connector according to the present invention>
The coaxial connector according to the present invention includes a female connector 10, a male connector 20, a dielectric 10D, and a peg P.
As can be seen from FIG. 6 (1) depicting the state before the female connector 10 and the male connector 20 are mated, the female connector 10 and the male connector 20 are each provided with a housing, an inner terminal, and an outer terminal as follows. I have. That is, the female connector 10 includes a female housing 10H, a female inner terminal 10Ti, and a female outer terminal 10To, and the male connector 20 includes a male housing 20H, a male inner terminal 20Ti, and a male outer terminal 20To. Each will be described below.

<Configuration of female connector 10>
The female connector 10 includes a female housing 10H, a female inner terminal 10Ti, and a female outer terminal 10To described below.

<< Female housing 10H >>
As shown in FIG. 1A, the female housing 10H is made of a resin having a rectangular tube shape having a space for accommodating the end portion of the coaxial cable inside, and has a rectangular tube-shaped female inner terminal 10Ti and a female outer terminal 10To. The fitting side that accommodates is fitted into the inner space of the male housing 20H (FIG. 2). A female inner terminal 10Ti is disposed at the center of the internal space of the female housing 10H, and a dielectric 10D is disposed so as to surround the female inner terminal 10Ti coaxially. Further, a female outer terminal 10To is disposed so as to surround the dielectric 10D.
In the conventional product, the dielectric 10D is a separate part from the female housing 10H. Therefore, it is difficult to align the female inner terminal 10Ti passing through the center of the female housing 10H and the dielectric 10D, which causes the impedance characteristics to deteriorate. However, in the present invention, the dielectric 10D and the female housing 10H in FIG. As shown by the same hatching, the dielectric 10D is integrally formed with the female housing 10H. This eliminates the need for alignment of the dielectric 10D, and therefore eliminates the cause of the deterioration of the impedance characteristics.

<< Female inner terminal 10Ti >>
As shown in FIG. 5A, the female inner terminal 10Ti is electrically connected to the core wire of the coaxial cable W, and is arranged in the center of the internal space of the female housing 10H. The dielectric 10D is coaxially formed. It is enclosed and electrically insulated from the female outer terminal 10To.

<< Female outer terminal 10To >>
As shown in FIGS. 5A and 5B, the female outer terminal 10To is for fixing the end of the coaxial cable W. The crimping terminal Tw fixes the outer sheath of the coaxial cable W, and the crimping terminal Tn fixes the coaxial cable. The W shield braid is fixed, the dielectric 10D is fixed with the terminal Td, and the lower half of the electrical contact portion with the male terminal 20T is shielded with the semi-cylindrical terminal 10h (with the male terminal 20T) The shield in the upper half of the electrical contact portion is handled by the male terminal side (described later).

<< Dielectric 10D >>
The dielectric 10D is a dielectric material that covers the female inner terminal 10Ti coaxially and holds the female outer terminal 10To coaxially positioned outside the female inner terminal 10Ti in an insulated state. In the conventional product, the dielectric 10D is a separate part from the female housing 10H. For this reason, it is difficult to align the female inner terminal 10Ti passing through the center of the female housing 10H and the dielectric 10D, resulting in a decrease in impedance characteristics.

<< Integrated molding of dielectric and female housing according to the present invention >>
The present invention is characterized in that the dielectric 10D and the female housing 10H, which are separate parts, are integrally formed.
By doing so, it is not necessary to align the dielectric 10D, and therefore the impedance characteristics are improved.

<Configuration of male connector 20>
The male connector 20 includes a male housing 20H, a male inner terminal 20Ti, and a male outer terminal 20To described below.

<< Male housing 20H >>
The male housing 20H is made of a rectangular tube-shaped resin having an internal space as shown in FIG. 3A, and the female housing 10H is fitted into the internal space from the fitting side, and the male inner terminal 20Ti from the non-fitting side. A male outer terminal 20To is introduced. Within this space, the female inner terminal 10Ti of the female housing 10H comes into contact with the male inner terminal 20Ti (FIG. 3C) (FIG. 2).

<< Male inner terminal 20Ti >>
As shown in FIGS. 3B and 3C, the male inner terminal 20Ti is introduced from the opposite side of the male housing 20H, and its tip is disposed at the center of the internal space of the male housing 20H, and the tip is folded back. It has elasticity due to its shape. Therefore, the elastic tip of the male inner terminal 20Ti enters and contacts the inner space of the female inner terminal 10Ti of the female housing 10H, and electrical connection is made.
A male outer terminal 20To surrounds the male inner terminal 20Ti, and the space between the male inner terminal 20Ti is filled with resin of the male housing 20H for electrical insulation.

<< Male outer terminal 20To >>
Since the male outer terminal 20To is an SMD (Surface Mount Device) connector type, the male outer terminal 20To is bent at 90 degrees and can be press-fitted from the back surface (non-fitting side) of the male housing 20H (FIG. 3 ( C)). The tip side is formed in the semi-cylindrical portion C according to the present invention as shown in FIG.

<< Semicylindrical part C according to the invention >>
With the semi-cylindrical part C according to the present invention, the electrical contact portion between the female inner terminal 10Ti and the male inner terminal 20To is located inside the semi-cylindrical part C in a state where the female connector and the male connector are fitted, Became responsible for shielding the upper half of the electrical contact area. The female outer terminal 10To described above performs the shielding of the lower half of the electrical contact portion. In this way, with the simple division of labor configuration, the same effect as that of the cylindrical portion surrounding the entire circumference of 360 degrees of the conventional product, that is, the entire circumference shield of the electrical contact portion is made.

"Peg P"
Further, a peg P is provided outside the male outer terminal 20To to form an SMD connector for a substrate that transmits a high-frequency signal.

<Mating process of male / female connector>
FIG. 6 is a longitudinal cross-sectional view for explaining the steps up to fitting of a male / female connector which is a coaxial connector according to the present invention.
(1) is a figure which shows during fitting of housings, and the front-end | tip part of female housing 10H has entered the inside of male housing 20H. At this time, the dielectric 10D is integrated with the female housing 10H and is advanced to the inside of the male housing 20H. The terminals are not yet in contact.
(2) is a view showing that the terminals are being fitted to each other, and the distal end portion of the male inner terminal 20Ti is inserted into the inlet of the female inner terminal 10Ti. At this time, since the dielectric 10D is integral with the female housing 10H, the dielectric 10D can enter the male outer terminal 20To without any special alignment effort.
(3) is a diagram showing a completely fitted state, in which the female inner terminal 10Ti and the male inner terminal 20Ti are in contact with each other, and the dielectric 10D also enters the inside of the male outer terminal 20To. Thus, according to the present invention, it is not necessary to align the axis of the dielectric, and the impedance characteristics can be improved.

<Summary>
As described above, in the conventional product, the outer terminal has a cylindrical shape or a rectangular tube shape around the entire circumference, and a dielectric is assembled therein. That is, the housing and the dielectric are separate parts. For this reason, the backlash between the component structures is increased, the axes of the respective component parts are difficult to align, and the impedance characteristics are degraded. However, according to the present invention, the tip of the outer terminal has a semi-cylindrical shape, and the housing and the dielectric are one component. In terms of performance, it was confirmed that the high-frequency performance was satisfied if the portion of the X dimension (FIG. 5C) was shielded by the outer terminal at the time of fitting. From the viewpoint of integral molding of the housing, the outer terminal on the male side is made into a semi-cylindrical shape, which is an alternative technique of the prior art. This eliminates the need for axial alignment of the dielectric, and therefore facilitates axial alignment of the inner terminal and the outer terminal, thereby improving the impedance characteristics.
In addition, since the housing and the dielectric are integrally formed, the number of parts of the connector can be reduced. Furthermore, since the housing and the dielectric are integrally formed, there is no backlash between the parts, the coaxiality is matched, and the impedance characteristics (high-frequency signal transmission measurement) can be improved. By making the tip of the male outer terminal semi-cylindrical, it is possible to integrally mold the resin of the housing and the dielectric. Therefore, because of the SMD type, the outer terminal bent at 90 degrees can be press-fitted from the back of the connector. In addition, since the tip of the outer terminal has a semi-cylindrical shape, the contact point with the mating terminal on the mating mating side is reduced, and the insertion force can be reduced.

DESCRIPTION OF SYMBOLS 10 Female connector 10H Female housing 10To Female outer terminal 10Ti Female inner terminal 10D Dielectric 10h Semi-cylindrical terminal 20 Male connector 20H Male housing 20To Male outer terminal 20Ti Male inner terminal C Semi-cylindrical part Td Dielectric fixed terminal Tn Shielded wire crimping terminal Tw Cable outer crimping terminal W Coaxial cable

Claims (2)

A female housing, a female outer terminal provided in the female housing, a female inner terminal provided in the female outer terminal, and a dielectric provided between the female outer terminal and the female inner terminal; A female connector with
A male connector comprising a male housing, a male outer terminal provided in the male housing, and a male inner terminal provided in the male outer terminal;
A coaxial connector comprising:
The female housing and the dielectric are integrally formed,
By forming the vicinity of the fitting outer end of the female outer terminal in a semi-cylindrical portion and forming the vicinity of the fitting outer end of the male outer terminal in a semi-cylindrical portion, the female inner terminal and the male inner terminal A coaxial connector characterized in that a shield on the entire circumference of the contact portion is constituted by a semi-cylindrical portion of the male outer terminal and a semi-cylindrical portion of the female outer terminal.   The coaxial connector according to claim 1, wherein the male housing is a printed circuit board (PCB), the male outer terminal is bent at 90 degrees, and a peg is provided on the outer side thereof.

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