JP2003317882A - Coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector in which impedance matching in the connector is made and transmission loss of a signal due to reflection or the like is small, and processing of a terminal to the coaxial cable is good. <P>SOLUTION: The conductor connection part 11b of an inner conductor terminal 11 before connecting to the signal conductor Wa of a coaxial cable W is housed in the dielectric body 12 exposed on one side of the dielectric body, and a conductive metal body 13 that comprises integrally an impedance matching part 13a covering the outside of the exposed conductor connection part 11b of the inner conductor terminal 11 and a sleeve part 13b inserted between the shield conductor Wd of the coaxial cable W and the insulating body Wb of the coaxial cable W, is installed. The cross section of the impedance matching part 13a of the metal body 13 is formed smaller than the cross section of the outer conductor terminal cylindrical part 14a. And an opening part 13d that is used in the connection processing of the signal conductor Wa to the conductor connection part 11b of the inner conductor terminal 11 is formed, and the opening part 13d is closed by a part of the cylinder part 14a at the time of housing of the outer conductor terminal. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector to be connected to a cable having a shield conductor such as a coaxial cable, and more particularly to a connector having a characteristic impedance matching with a transmission path and being attached to a cable terminal. The present invention relates to a high-frequency coaxial connector that can be easily connected.

[0002]

2. Description of the Related Art In recent years, electric signals transmitted to a control printed circuit board on which electronic parts, ICs (integrated circuits) and the like built in electric devices of automobiles such as car navigation systems are mounted have become faster (higher frequency). In addition, the board pattern of the printed board is also densely packed and densified. Generally, a high-frequency compatible coaxial cable is used to transmit such a high-frequency electric signal, but as the frequency of the transmitted electric signal becomes higher, the connector connected to this coaxial cable also has a higher frequency. There is a demand for miniaturization.

As a general structure of a coaxial cable, a signal conductor in which a plurality of metal element wires are twisted and bundled as a transmission path for electric signals and the like and a shield conductor formed of a braided wire in which a plurality of element wires are braided are used. An insulator is interposed between them, and the outer circumference of the insulator is also covered by an insulating sheath to form a coaxial structure.
The shield conductor covers the outer circumference of the signal conductor at regular intervals without any gap, and thus has a structure suitable for transmission of high-frequency electrical signals.

In general, a coaxial connector having built-in terminals connected to both ends of a coaxial cable for transmitting such a high frequency signal has an inner conductor terminal connected to a signal conductor of the cable and a shield such as a braided wire. An outer conductor terminal that is connected to a conductor and that electromagnetically shields by covering the outer periphery of the inner conductor terminal; and a dielectric body having a predetermined dielectric constant provided between the inner conductor terminal and the outer conductor terminal. It is provided and is electrically connected individually to the signal conductor and the shield conductor exposed by stripping off the insulator and the sheath of the cable end to be connected.

Signal reflection occurs when the characteristic impedance of the coaxial cable in the transmission of high-frequency electrical signals does not match the characteristic impedance of the coaxial connectors connected to both ends of this cable. Since reflection causes noise and wastes energy transmission, it is usually necessary to set the impedance to, for example, 50Ω to achieve impedance matching with the coaxial cable in the coaxial connector. The characteristic impedance of a coaxial connector is generally adjusted by adjusting the "ratio of inner diameter of outer conductor terminal cross section to outer diameter of inner conductor terminal cross section" and "relative permittivity of dielectric material" to be connected to the coaxial cable. Impedance matching is achieved. In addition, in a coaxial connector, if the inner conductor terminal in the connector is not covered by the outer conductor terminal, there is also the problem that the shielding performance such as radiation characteristics deteriorates. It is desired to be covered without.

As a conventional coaxial connector for high frequency,
There is one disclosed in Japanese Patent Laid-Open No. 2000-260540. This connector is intended to prevent the signal conductor of the coaxial cable from being broken when assembled for connection to the coaxial cable and to prevent eccentricity between the inner conductor terminal of the connector and the coaxial cable.

In the step of assembling the coaxial connector to the coaxial cable, i) the signal conductor and the shield conductor are exposed to a predetermined length by peeling off the coaxial cable terminal through which the outer conductor terminal is preliminarily passed, ii) the signal conductor Crimping the crimping portion of the inner conductor terminal to iii) inserting a separately prepared sleeve between the insulator and the shield conductor, iv) mounting a dielectric on the inner conductor terminal portion, v) and then The step is to return the passed outer conductor terminal to accommodate the dielectric, and vi) finally perform crimping of the outer conductor terminal to the cable.

[0008]

However, in the coaxial connector disclosed in Japanese Patent Laid-Open No. 2000-260540, the signal conductor is cut off when the outer conductor terminal is pulled back in order to accommodate the dielectric material mounted on the inner conductor terminal. In order to prevent this from happening, the opening at the rear end of the outer conductor terminal is large, and it was not excellent in terms of impedance matching with the coaxial cable and shielding performance.

Further, the connector of this structure has a problem in assembling it to the cable. In other words, most of the above-mentioned assembling steps have to be performed manually, and the production cost has a high ratio to the unit price of the product as compared with a connector with a more automated assembling, making it difficult to provide at low cost.

The problem to be solved by the present invention is to improve the impedance matching of the coaxial connector to reduce the noise radiation amount, the reflection loss of the signal, and the like, and at the same time, the coaxial connector is preferably assembled into a cable end. Is to provide.

[0011]

In order to solve this problem, a coaxial connector according to the present invention is a coaxial cable in which a signal conductor and a shield conductor are coaxially arranged via an insulator and the outer circumference is covered with a sheath. An inner conductor terminal is connected to the signal conductor, the inner conductor terminal is accommodated in a tubular portion of the outer conductor terminal via a dielectric, and the shield conductor is connected at a crimp portion extending from the tubular portion. In the coaxial connector, the conductor connecting portion of the inner conductor terminal before being connected to the signal conductor is exposed and accommodated on one side of the dielectric in the dielectric, and the exposed inner conductor A conductive metal body integrally provided with an impedance matching portion that covers the outside of the conductor connection portion of the terminal and a sleeve portion that is inserted between the shield conductor and the insulator of the coaxial cable is mounted. metal The impedance matching part is formed such that its cross section is smaller than the cross section of the outer conductor terminal tubular part, and an opening used when connecting the signal conductor to the conductor connection part of the inner conductor terminal is formed. The gist is that the opening is formed and is closed by a part of the tubular portion when the opening is accommodated in the outer conductor terminal.

According to the coaxial connector having the above structure,
Inserting the sleeve part of the metal body between the shield conductor and the insulator of the cable with the inner conductor terminal and the metal body pre-installed in the dielectric to perform the connection process between the inner conductor terminal and the signal conductor. Therefore, even if the outer conductor terminal is pulled back after the connection, the movement of the insulator of the coaxial cable is restricted by the sleeve part of the metal body, and the inner conductor terminal and the signal conductor are held coaxially. No stress is applied to the connection between the terminal crimping part and the signal conductor. In other words, the eccentricity is prevented without the risk of centering failure such as disconnection of the signal conductor or misalignment between the inner conductor terminal and the axis of the coaxial cable. Therefore, it is not necessary to provide the opening of the outer conductor terminal as in the prior art, and the entire inner conductor terminal and the opening of the metal body can be sufficiently covered with the tubular portion of the outer conductor terminal, so that the shield performance is deteriorated. Absent.

Further, in the prior art, the connection of the signal conductor to the inner conductor terminal and the insertion of the sleeve between the insulator and the shield conductor are separate steps, but in the configuration according to the present invention these are one step. Since it can be performed at one time, the processability of the terminal is improved, and further, it can be performed by machine automation, and the manufacturing cost for assembling the coaxial connector can be reduced.

Further, in addition to the above-mentioned effects, the impedance near the connecting portion between the inner conductor terminal and the signal conductor, which is usually higher than the characteristic impedance of the cable, is lowered to achieve impedance matching. This is made possible by adopting a configuration in which an impedance matching portion that electrically reduces the cross-sectional area of the outer conductor terminal tubular portion in the vicinity of the portion is provided integrally with the sleeve portion of the metal body, and the increase in parts is also suppressed. .

In this case, the metal body is attached to the dielectric body by engaging one side of the dielectric body with the impedance matching portion of the metal body, and the metal body is attached to the dielectric body as a means for attaching the metal body to the dielectric body. If the impedance matching portion of the body is used, the metal body can be mounted on the dielectric body without separately providing a dedicated means for mounting the metal body, and the complicated shape of the metal body can be avoided.

[0016]

DETAILED DESCRIPTION OF THE INVENTION A coaxial connector according to an embodiment of the present invention will be described in detail below with reference to the drawings. 1 is an exploded perspective view of the coaxial connector 10 seen from the rear, FIGS. 2 to 4 are perspective views showing a process of assembling and connecting the coaxial connector to a coaxial cable, and FIGS. 5 (a) to 5 (c) are views. 2 to 4 are top views corresponding to each, FIG. 6 is a perspective view of a metal body according to another embodiment, and FIGS. 7 and 8 are perspective views of a coaxial connector according to another embodiment.

The coaxial connector 10 shown in FIG. 1 is equipped with an inner conductor terminal 11 connected to the signal conductor Wa of the coaxial cable W, a dielectric 12 accommodating the inner conductor terminal 11, and a rear end of the dielectric 12. Metal body 13 and dielectric body 1
2 and the metal body 13 are accommodated and the shield conductor Wd
And an outer conductor terminal 14 connected to the outer conductor terminal 14.

A high-frequency signal is transmitted to the inner conductor terminal 11 connected to the signal conductor Wa of the coaxial cable W, and the outer conductor terminal 14 covers the periphery of the inner conductor terminal 11 to electromagnetically. The dielectric 12 has a predetermined dielectric constant so as to insulate the terminals from each other. The metal body 13 is an annular sleeve portion 1 that prevents the cross-section deformation of the cable due to the crimping of the outer conductor terminal 14.
3b and an impedance matching portion 13a having upper and lower openings at its front position.

The inner conductor terminal 11 is formed into a substantially cylindrical shape by stamping out a conductive plate material and then bending it by pressing or the like. The inner conductor terminal 11 is connected to the inner conductor terminal of a mating connector (not shown) to transfer an electric signal. Done. The inner conductor terminal 11 in this case has a so-called female terminal shape, and is provided with a tubular portion 11a having an arcuate elastic contact piece divided in the circumferential direction by a slit in the longitudinal direction at the front portion, When a tab portion of a male terminal of a mating connector (not shown) is inserted inside the elastic contact piece, the tab portion is elastically contacted and connected to the tab portion.

At the rear portion of the inner conductor terminal 11, there is provided a crimping portion 11b which is crimped to the signal conductor Wa of the exposed coaxial cable W, and a pair of crimping pieces 11c formed on the crimping portion 11b. , 11c are initially open upward.

Dielectric 1 into which this inner conductor terminal 11 is inserted
2 is formed of a resin insulating material having a predetermined dielectric constant, and is formed of an inner conductor terminal 11 and an outer conductor terminal 1 described later.
It is assembled between the conductor terminals 4 and 4 to bring the conductor terminals into an insulated state. The dielectric body 12 has an insertion hole that accommodates substantially the entire cylindrical portion 11a of the inner conductor terminal 11 and is opened in the front-rear direction to form the main body portion 12
It is formed in a. When the inner conductor terminal 11 is inserted from the rear side of the dielectric body 12, the crimping section 11b is exposed from the rear side of the main body section 12a and accommodated therein.

Further, mounting pieces 12b, 12b for mounting a metal body 13, which will be described later, on the dielectric body 12 project rearward from the rear surface of the main body portion 12a of the dielectric body 12. The left and right mounting pieces 12b, 12b are used as signal conductors W to the crimp portion 11b of the inner conductor terminal 11 after being inserted into the dielectric 12.
In order to perform the crimping process of a, they are provided so as to be separated from each other by a distance that does not interfere with a crimping jig moving in the vertical direction (not shown). On the outer side surfaces of the mounting pieces 12b, 12b, convex portions 12c, 12c protruding outward are formed, respectively, and the impedance matching portion 13 of the metal body 13 described later is formed.
It is adapted to be fitted into the engagement holes 13c, 13c formed in a.

The metal body 13 is formed into a substantially cylindrical shape by punching out a conductive plate material and then bending it by pressing or the like. The impedance matching portions 13a, 13a having two arcuate front open upper and lower sides. And a sleeve portion 13b having a rear annular shape are integrated. The impedance matching portion 13a of the metal body 13,
The outer diameter of the portion 13a is smaller than the inner diameter of the tubular portion 14a of the outer conductor terminal 14 described later.
It has a function of matching the impedance in the vicinity of the crimping portion 11b after the crimping process of No. 1 so as not to be equal to that of the cable. The left and right impedance matching portions 13a, 13a
The upper and lower openings 13d, 13d between the inner conductor terminal 11 and the metal body 13 are attached to the dielectric 12 so that the signal conductor Wa can be crimped onto the crimp portion 11b of the inner conductor terminal 11. In addition, the opening width is such that the crimping jig does not interfere with the vertical direction (not shown).

Further, the impedance matching portions 13a, 13
a is an engaging hole 13 that engages with the protrusions 12c and 12c provided on the dielectric mounting pieces 12b and 12b.
c and 13c are formed, the dielectric 12 has a metal body 13
It is designed so that it will not come off easily when attached.

The inner diameter of the annular sleeve portion 13b is formed to be substantially equal to or slightly larger than the outer diameter of the insulator Wb of the coaxial cable W, and the shield conductor W braided with the insulator Wb.
It is inserted between d and. By this insertion, from above the sleeve portion 13b covered with the shield conductor Wd, the braided crimping piece 14 of the crimping portion 14b of the outer conductor terminal 14 to be described later is provided.
Although caulking of d and 14d is performed, this is for preventing the cross-section deformation of the insulator Wb due to compression at that time. In this embodiment, the impedance matching unit 13
Although the cross-sectional areas of the a and 13a portions and the cross-sectional area of the sleeve portion 13b are the same, the impedance matching portions 13a and 13a have a cross-sectional area of the crimp portion 11b after the inner conductor terminal 11 is crimped. It is possible to change the impedance in the vicinity of the crimping portion 11b so as to be equal to that of the cable by expanding or narrowing it in accordance with the shape or the like. Further, as shown in FIG. 6, the left and right impedance matching portions 13a, 13a of the metal body 13 may be connected to each other at their tips to improve the strength.

The outer conductor terminal 14 is formed by punching a conductive plate material and then bending it by pressing or the like.
A main body cylindrical portion 14a formed in a cylindrical shape having an opening in the front and rear,
The main body tubular portion 14a is provided with a crimping portion 14b extending rearward from a lower portion of a rear end thereof. In the housing chamber 14c inside the main body cylindrical portion 14a of the outer conductor terminal 14, the metal body 13 described above is inserted.
It is possible to accommodate the dielectric body 12 mounted with.

In the crimping portion 14b after the main body tubular portion 14a, a pair of braided crimping pieces 14d, 14d and outer jacket crimping pieces 14e, 14e are formed in front and rear, and are initially opened upward. It is in a state. The front braided crimp pieces 14d, 14d are crimped to the sleeve portion 13b of the metal body 13 covered with the shield conductor Wd. As a result, the shield conductor Wd of the coaxial cable W is electrically connected to the outer conductor terminal 14 and the metal body 13.
The outer jacket crimping pieces 14e, 14e are caulked to the sheath We portion where the signal conductor Wa and the shield conductor Wd are not exposed.

In the process of assembling the coaxial connector 10 having the above-described structure to the coaxial cable W, i) the outer conductor terminal 14 is preliminarily passed through the coaxial cable W and the cable conductor is stripped to a predetermined length. Wa and the shield conductor Wd are exposed (at this point, the shield conductor Wd may be spread like a trumpet), ii) The inner conductor terminal 11 and the metal body 13 are previously attached to the dielectric 12 (up to this point) The state is shown in FIGS. 2 and 5 (a)). iii) Then, the coaxial cable W is attached to the crimp portion 11b of the inner conductor terminal 11.
Signal conductor Wa is mounted, and the sleeve portion 13b of the metal body 13 is inserted between the shield conductor Wd and the insulator Wb (see FIG. 3). Iv) Opening above and below the impedance matching portion 13a of the metal body 13 The signal conductor Wa is pressure-bonded to the inner conductor terminal 11 by using the openings 13d and 13d (see FIGS. 3 and 5B), and v) Finally, the outer conductor terminal 14 is connected to the dielectric 12. Pull back to the position to engage,
The crimp portion 14b of the outer conductor terminal 14 is crimped to the coaxial cable W (see FIGS. 4 and 5C).

The configuration of the coaxial connector 10 according to the embodiment of the present invention and the assembling to the coaxial cable have been described above. Next, the functions of these configurations will be described. The characteristic impedance of the coaxial connector is adjusted by adjusting the "ratio of the inner diameter of the outer conductor terminal cross section to the outer diameter of the inner conductor terminal cross section" and the "dielectric constant of the dielectric" as described above, and However, since the inner conductor terminal is crimped after crimping, the inner diameter of the crimping section is usually a size and shape that prioritizes electrical connection reliability with the signal conductor of the cable. , The diameter is smaller than the cross-sectional diameter of the terminal portion housed in the dielectric. On the other hand, in this range, the cross-sectional area of the cylindrical outer conductor terminal is constant, so if the impedance of the front part of the coaxial connector is made equal to that of the coaxial cable, the impedance near the inner conductor terminal crimp part will be higher than that of the coaxial cable. turn into.

In order to improve this, conventionally, as a method of matching the impedance by increasing the diameter of the crimped portion of the inner conductor terminal after crimping, and coping with the transmission of a higher frequency electric signal, the crimped portion after crimping Although a method of winding metal tape separately or crimping a cylindrical metal sleeve part from the top to make it thicker has been adopted, the process of winding a metal tape and increasing the diameter of the crimp part is a manual process. In addition, in the case of a small coaxial connector, the work is very complicated and the processing accuracy does not come out because it is performed on the crimped part of the inner conductor terminal after the extra-fine crimping, and the manufacturing process time of the connector is shortened. It is difficult to reduce the cost. Further, if the metal tape should come off, it may come into contact with the outer conductor terminal and cause a short circuit, which makes it impossible to use the connector in a severe environment.

Further, the process of further crimping the tubular metal sleeve from above and increasing the diameter of the crimped portion after crimping can be performed automatically by mechanizing the crimping of the sleeve, which is low cost. However, since crimping of this metal sleeve is naturally performed when processing the cable end when connecting the cable to the connector, it is dedicated to crimping the metal sleeve at each processing line of the automated cable end processing factory. It is necessary to separately prepare a processing machine of
On the contrary, the cost becomes high.

According to the coaxial connector 10 of the present invention,
Since the impedance matching portion 13a of the metal body 13 having a smaller diameter than the outer conductor terminal 14 is provided at the position of the inner conductor terminal crimping portion 13b, the outer conductor terminal 14 at that portion is provided.
The impedance can be matched by reducing the cross-sectional area of the and reducing the impedance of this high portion.
Therefore, such work can be omitted as compared with the case where the separate crimping portion is thickly processed as described above.

These processing steps are the same as those performed in the field of conventional connectors, and can be automated by a machine. In the prior art, the crimping of the signal conductor to the inner conductor terminal and the sleeve insertion are separate steps, but in the present structure, these can be performed as one step at a time. Therefore, all of them can be manufactured at a lower cost than those of the coaxial connectors described in the prior art which are manually assembled.

Generally, when the coaxial cable is deformed by crimping the coaxial cable at the crimping portion of the outer conductor terminal, the impedance is disturbed and the electric signal is reflected. Especially when used for a high frequency, the insulator used for the coaxial cable is often a foam type, and this influence becomes great. In the prior art, the high-frequency characteristics are improved by biting the sleeve under the shield conductor, but since the ordinary sleeve is simply tubular, it is easy to slip or drop during work. However, the coaxial connector according to the present invention 10 In this structure, the inner conductor terminal 1 is attached and fixed to the dielectric 12.
If the signal conductor Wa is connected to 1, this problem will not occur. Further, since the sleeve portion 13b is integrated with the impedance matching portion 13a of the metal body 13, the number of steps and the number of parts are not increased.

Further, in this structure, even if the outer conductor terminal 14 is pulled back after crimping the inner conductor terminal 11 and the signal conductor Wa, the movement of the insulator Wb of the coaxial cable W is restricted by the sleeve portion 13b of the metal body 13. Since the inner conductor terminal 11 and the signal conductor Wa are held on the coaxial line as they are, no stress is applied to the connecting portion between the inner conductor terminal crimping portion 11b and the signal conductor Wa. That is, there is no risk of centering failure such as the signal conductor Wa being cut off or the axis of the inner conductor terminal 11 and the axis of the coaxial cable W not being aligned. Therefore, since it is not necessary to provide an opening for the outer conductor terminal as in the prior art, the entire inner conductor terminal can be sufficiently covered with the outer conductor terminal, and the shield performance is not deteriorated.

In this case, even when the outer conductor terminal 14 has the opening 14f as shown in FIGS. 7 and 8, when the outer conductor terminal 14 is pulled back, the opening is formed in the impedance matching portion 13a on one side of the metal body 13. If the portions 14f overlap each other, the opening 14f can be closed with the impedance matching portion 13a (see FIG. 8). Therefore, according to this structure, even if the outer conductor terminal has an opening, the shield performance can be prevented from being deteriorated, and the outer conductor terminal 14 can be easily pulled back.

In general, in order to miniaturize such a coaxial connector, it is necessary to minimize the internal conductor terminal to be built in. However, the miniaturized inner conductor terminal has a reduced mechanical strength and is therefore exposed. When the terminal processing is performed on the cable, the elastic contact piece of the terminal may be damaged. In the structure of the coaxial connector 10 according to the present invention, the inner conductor terminal 11
Since it has been inserted into the dielectric body 12 first, and the metal body is attached, the crimping portion is not exposed to the outside, so there is no need to leave it exposed during the process of processing the cable end, so there is no damage. There is no fear.

Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and it is needless to say that the present invention can be implemented in various modes without departing from the scope of the present invention. . For example, in the above-described embodiment, the impedance matching portion is provided in the shape of a circular arc in the vicinity of the outer periphery of the connection portion of the inner conductor terminal with the signal conductor, but various shapes can be used. It suffices that the cross-sectional area of this portion be made small so as to achieve impedance matching, and it is not limited to the above-mentioned embodiment. Further, although the female type connector is shown in the embodiment, it is also applicable to a male type connector. Further, although the round type coaxial connector is shown in the above embodiment, it is needless to say that the present invention can be applied to a conventional rectangular type coaxial connector.

[0039]

According to the coaxial connector of the present invention, the sleeve portion of the metal body is inserted between the shield conductor and the insulator of the cable while the inner conductor terminal and the metal body are preliminarily attached to the dielectric body. Since the inner conductor terminal and the signal conductor are connected and processed, even if the outer conductor terminal is pulled back after the connection, the signal conductor may be broken, or the axis of the coaxial cable does not align with the inner conductor terminal. Eccentricity is prevented without the risk of centering failure. Therefore, it is not necessary to provide an opening in the outer conductor terminal as in the prior art, and the entire inner conductor terminal and the opening in the metal body can be sufficiently covered with the outer conductor terminal, so that the shield performance is not deteriorated.

Further, in the prior art, the connection of the signal conductor to the inner conductor terminal and the sleeve insertion are separate steps. However, in the configuration according to the present invention, these can be performed as one step at a time, so the terminal The workability is improved and it can be automated by a machine, and the manufacturing cost for assembling the coaxial connector can be reduced. In addition, in order to achieve impedance matching by lowering the impedance near the connection between the inner conductor terminal and the signal conductor, which is higher than the characteristic impedance of the cable, the cross-sectional area of the outer conductor terminal tubular part near that connection should Since the impedance matching part to be made smaller is provided integrally with the sleeve part of the metal body, impedance matching is also achieved,
Signal reflections are prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a coaxial connector according to an embodiment of the present invention as viewed from the rear.

FIG. 2 is a view showing an assembly of a coaxial connector to a coaxial cable.

FIG. 3 is a diagram showing a next step of assembling the coaxial connector to the coaxial cable of FIG.

FIG. 4 is a diagram showing a coaxial connector that has been assembled to a coaxial cable.

5A is a top view of FIG. 2, FIG. 5B is a top view of FIG. 3, and FIG. 5C is a top view of FIG.

6 is a view showing another embodiment of the metal body of FIG.

FIG. 7 is a view showing an assembly of a coaxial connector according to another embodiment of the present invention to a coaxial cable.

8 is a diagram showing a coaxial connector that has been assembled to the coaxial cable of FIG.

[Explanation of symbols]

10 coaxial connector 11 Inner conductor terminal 11b Crimping part 12 Dielectric 12b mounting piece 13 metal body 13a Impedance matching section 13b Sleeve part 13d opening 14 Outer conductor terminal 14a Main body cylinder 14b Crimping part W coaxial cable Wa signal conductor Wb insulator Wc shield conductor Wd sheath

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Norifumi Yoshida             1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi             Auto Network Technical Laboratory Co., Ltd.

Claims (2)

[Claims] 1. An inner conductor terminal is connected to the signal conductor of a coaxial cable in which a signal conductor and a shield conductor are coaxially arranged via an insulator and the outer periphery is covered with a sheath, and the inner conductor terminal is made of a dielectric material. A coaxial connector which is housed in a tubular portion of an outer conductor terminal via the shield conductor and is connected to the shield conductor at a crimping portion extending from the tubular portion, The conductor connecting portion before connection with the signal conductor is exposed and accommodated on one side of the dielectric, and the impedance matching portion covering the outside of the exposed conductor connecting portion of the inner conductor terminal and the shield of the coaxial cable. A conductive metal body integrally provided with a sleeve portion inserted between a conductor and an insulator is mounted, and the impedance matching portion of the metal body has a cross section of the outer conductor terminal tubular portion. Cross section It is formed to be smaller than
An opening used when connecting the signal conductor to the conductor connecting portion of the inner conductor terminal is formed, and the opening is closed by a part of the tubular portion when the outer conductor terminal is accommodated. A coaxial connector characterized in that 2. The coaxial connector according to claim 1, wherein a metal body is mounted on the dielectric body by engaging one side of the dielectric body with an impedance matching portion of the metal body. .