JP2010056033A - Coaxial connector, method of manufacturing the coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector and a method of manufacturing the coaxial connector of which a size can be reduced, while securing proper impedance characteristics. <P>SOLUTION: In order to secure electrical connection between a shell of the coaxial connector and an external conductor 103 of a coaxial cable 100, the external conductor 103 and an internal insulator 102 covered by the external conductor of the coaxial cable 100 are not directly caulked by a gripping part formed on the shell of the coaxial connector, but rather, by having a conductive sleeve 105 for covering an outer surface 103a of the external conductor 103 caulk directly by the gripping part, the shell of the coaxial connector and the external conductor 103 of the coaxial cable 100 are electrically connected via the sleeve 105 without changing shapes of the external conductor 103 and the internal insulator 102. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coaxial connector and a method for manufacturing a coaxial connector.

  A coaxial connector is used in order to establish a high frequency electrical signal connection between electronic components inside an electronic device or the like that is becoming smaller. Such a coaxial connector is generally formed by attaching a connector block to a coaxial cable. The coaxial cable mainly includes an internal insulator that covers the outer surface of the linear conductor, a conductive outer conductor that covers the outer surface of the inner insulator, and a skin that covers the outer surface of the outer conductor. The connector block mainly includes a terminal portion and an external conductor portion that is electrically insulated from the terminal portion. The connector block is attached to the coaxial cable such that the terminal portion is electrically connected to the linear conductor of the coaxial cable and the outer conductor portion is electrically connected to the outer conductor of the coaxial cable. As a technique for electrically connecting the outer conductor of the coaxial cable and the outer conductor portion of the connector block, those disclosed in Patent Documents 1 and 2 are known.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-311452) discloses a method in which a cylindrically-curved portion constituting the outer conductor portion of the connector block crimps and grips the outer conductor exposed from the outer sheath of the coaxial cable. Yes.

  In Patent Document 2 (Japanese Patent Laid-Open No. 2003-109712), in a state where a metal tube is inserted between an inner insulator of a coaxial cable and an outer conductor, the outer conductor constitutes an outer conductor portion of the connector block. A technique of caulking by a cylindrically curved portion is disclosed.

JP 2004-311452 A JP 2003-109712 A

  However, the method according to the above prior art first has a problem of deteriorating the impedance characteristics of the coaxial cable. Specifically, in order to maintain good impedance characteristics of the coaxial cable, the distance between the outer conductor and the linear conductor is required to be the same. If this distance is not the same, the electrical impedance will not match, so noise will be mixed in the coaxial cable and the gain of the coaxial cable will be attenuated.

  The methods disclosed in Patent Documents 1 and 2 are based on a configuration in which the cylindrically-curved portion of the connector block caulks the shield member of the coaxial cable as described above. In Patent Document 1, the inner insulator is compressed to reduce its inner diameter, and in Patent Document 2, the metal tube and the inner insulator are compressed to reduce their inner diameter, and the inner diameter is reduced. This corresponds to reducing the distance between the outer conductor and the linear conductor that covers the upper portion. Therefore, when these methods are used, the distance between the crimped portion of the outer conductor and the linear conductor is smaller than the distance between the other portion of the outer conductor and the linear conductor. End up. Furthermore, not only the distance between the outer conductor and the linear conductor is not the same, but there is also a possibility that the coaxial cable is damaged by being caulked.

  Such a problem becomes more prominent as the outer diameter of the coaxial cable becomes smaller. In other words, the impedance characteristics of this coaxial cable are smaller if the displacement at the distance between the outer conductor and the linear conductor due to the caulking process is negligibly small compared to the outer diameter of the inner insulator in the coaxial cable. Degradation of may fall within an acceptable range. However, in recent years, with the demand for miniaturization of electronic devices and the like, it is necessary to reduce the size of the coaxial cable used in such devices. The smaller the size of the coaxial cable, the more critical the displacement at the distance between the outer conductor and the linear conductor due to the caulking process compared to the outer diameter of the inner insulator in this coaxial cable. It becomes.

  Secondly, the above-described conventional technique is suitable for a coaxial cable having a certain size, but is not suitable for a small coaxial cable. Specifically, the caulking process as disclosed in Patent Document 1 is directly applied to a small-sized coaxial cable currently used whose inner diameter of the inner insulator is about 0.2 mm. This leads to breakage of the coaxial cable. Further, in such a small coaxial cable, as disclosed in Patent Document 2, it is not easy to insert a metal tube between the inner insulator and the outer conductor, so that workability is poor. is there.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a coaxial connector that can be downsized while ensuring good impedance characteristics, and a method of manufacturing the coaxial connector. It is.

In order to ensure electrical connection between the shell of the coaxial connector and the outer conductor of the coaxial cable, the inventor forms an outer conductor in the coaxial cable and an inner insulator covered by the outer conductor in the coaxial connector shell. If the conductive cylindrical member that covers the outer surface of the outer conductor is directly squeezed by the gripping part instead of being squeezed directly by the gripping part, the shape of the outer conductor and the inner insulator changes. It has been noted that the shell of the coaxial connector and the outer conductor of the coaxial cable can be electrically connected through the conductive cylindrical member without causing any trouble.
Furthermore, the present inventor has paid attention to the configuration of the cylindrical member so that the shape of the outer conductor of the coaxial cable is not substantially deformed when gripped by the grip portion formed on the shell. As a specific first method, the present inventor considered that (the deformation of the inner surface of the cylindrical member leads to the deformation of the shape of the outer conductor and the inner insulator covered by the cylindrical member). Note that the cylindrical member is configured to have a strength determined so that the shape of the inner surface of the cylindrical member does not deform when gripped by the gripping portion. Furthermore, as a second technique, the present inventor has focused on configuring the cylindrical member so as to absorb the force received when gripped by the grip portion. By using the cylindrical member configured as described above, the present inventor can coaxially connect the coaxial connector shell via the conductive cylindrical member without changing the shape of the outer conductor and the inner insulator in the coaxial cable. The present inventors have found that the external conductor of the cable can be electrically connected and have come to the present invention.

Such a technical idea can be expressed as follows.
That is, the coaxial connector according to the present invention includes an inner insulator that covers the outer surface of the linear conductor, an outer conductor that contacts the outer surface of the inner insulator and covers the outer surface, and an outer insulator that covers the outer surface of the outer conductor. A conductive cylindrical member that covers the outer surface of the outer conductor that is exposed without being covered by the outer insulator, and that has a gap extending in the extending direction of the coaxial cable. A cylindrical member fixed to the outer conductor by applying a sticking agent to the gap, and a gripping part that is attached to the coaxial cable so as to receive one end of the coaxial cable and grips the cylindrical member A metallic shell, and the cylindrical member is configured so as not to substantially deform the shape of the outer conductor when gripped by the grip portion.

  A method of manufacturing a coaxial connector according to the present invention includes an internal insulator that covers an outer surface of a linear conductor, an outer conductor that contacts the outer surface of the inner insulator and covers the outer surface, and an outer insulator that covers the outer surface of the outer conductor. A carrier having a step of preparing a coaxial cable having a body, a connecting portion projecting from one end, and a conductive rectangular member connected to the connecting portion, between the connecting portion and the rectangular member Preparing a carrier having a notch along the boundary, and forming an inner surface connecting one end and the other end of the rectangular member of the carrier along the outer surface of the outer conductor of the coaxial cable, The step of bending the rectangular member, and the coaxial cable so that the outer surface of the outer conductor exposed without being covered by the outer insulator of the coaxial cable faces the inner surface of the curved rectangular member of the carrier. Engaging the front carrier with a cable and fixing the curved rectangular member to the coaxial cable by applying an adhesive between the one end and the other end of the curved rectangular member. And separating the curved rectangular member and the connecting portion along the notch.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings to be referred to, the same reference numerals are given to common components.

First, the configuration of the coaxial cable according to the present invention will be described.
FIG. 1 is a perspective view showing a configuration of a coaxial cable according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing a cross section along the line AA ′ of the coaxial cable shown in FIG. 1.

A coaxial cable 100 shown in FIG. 1 includes an internal insulator 102 that covers the outer surface 101a of the linear conductor 101, a conductive outer conductor 103 that contacts the outer surface 102a of the inner insulator 102 and covers the outer surface, and an outer conductor 103. And an external insulator (outer skin) 104 covering the outer surface 103a.
The outer conductor 103 is schematically shown in FIGS. 1 and 2, but can be constituted by a plurality of linear conductors extending along the extending direction D of the coaxial cable 100.
In addition, as such a coaxial cable 100, the arbitrary cables available on the market can be used. For example, it is also possible to use a small-sized coaxial cable provided with the inner insulator 102 having an outer diameter of 0.1 to 0.2 mm.

  The coaxial cable 100 further includes a conductive sleeve 105. The sleeve 105 is composed of a cylindrical member having a substantially C-shaped cross section. The sleeve 105 may be formed of a cylindrical member having a substantially U-shaped cross-sectional shape instead of the substantially C-shaped cross-sectional shape.

  The sleeve 105 covers the exposed outer surface 103 a of the outer conductor 103 without being covered with the outer skin 104. A gap 105 x extending in the extending direction D of the coaxial cable 100 is formed in the sleeve 105. FIG. 1 shows a configuration in which the sleeve 105 covers only the outer surface 103a of the outer conductor 103 as an example. However, the sleeve 105 extends beyond the outer conductor 103 to the outer skin 104, that is, the outer conductor. You may comprise so that not only 103 but the outer skin | cover 104 may be covered.

Such a sleeve 105 has, for example, a plate-like metal member (for example, phosphor bronze) such that the inner surface 105c that connects one end 105a and the other end 105b has a shape along the outer surface 103a of the outer conductor 103. It is formed by bending a metal member. The sleeve 105 curved in this way is engaged with the coaxial cable 100 by receiving the coaxial cable 100 in a region surrounded by the inner surface 105c from the gap 105x formed between the one end 105a and the other end 105b. To do. That is, the sleeve 105 can be attached to the coaxial cable 100 from the radial direction.
Alternatively, in the curved sleeve 105, the tip end portion of the coaxial cable 100 is inserted into a region surrounded by the inner surface 105c of the sleeve 105, and the coaxial cable 100 is moved along the extending direction of the sleeve 105. Thus, the coaxial cable 100 is engaged. That is, the sleeve 105 can be attached to the coaxial cable 100 from the axial direction.

The sleeve 105 engaged with the coaxial cable 100 in this manner is fixed to the outer conductor 103 by applying a fixing agent 106 to a gap 105x formed between one end 105a and the other end 105b of the sleeve 105. . More specifically, the sleeve 105 is fixed to the outer conductor 103 by applying a bonding agent 106 to a region surrounded by one end 105 a and the other end 105 b of the sleeve 105 and the outer surface 103 a of the outer conductor 103. In this case, as the fixing agent 106, for example, solder and an adhesive can be used. As the adhesive, it is preferable to use a conductive adhesive as the best mode, but it is also possible to use an adhesive having no conductivity.
In addition to this, the sleeve 105 is also fixed to the outer conductor 103 by applying a conductive adhesive between the inner surface 105 c of the sleeve 105 and the outer surface 103 a of the outer conductor 103.
In this way, the gap 105x formed in the sleeve 105 is closed with the fixing agent 106, whereby the inner peripheral surface of the sleeve 105 is continuously and completely connected. Thereby, the durability in the radial direction of the sleeve 105 is improved.

Further, the sleeve 105 is preferably determined in consideration of the following points.
In the present invention, the sleeve 105 is caulked by the outer conductor portion of the coaxial connector (details will be described later), thereby establishing an electrical connection between the outer conductor portion and the outer conductor 103. When the sleeve 105 is crimped by the outer conductor portion, the shape (outer shape) of the outer conductor 103 and the shape of the inner insulator 102 are not deformed. Therefore, the distance between the outer conductor 103 and the linear conductor 101 is the same. It is desirable to maintain the state. That is, the sleeve 105 is configured so as not to substantially deform the shape of the outer conductor 103 when held by the outer conductor portion.

(First method)
As a first method for realizing this, the sleeve 105 can have a strength determined so that the shape of the inner surface of the sleeve 105 does not change when the sleeve 105 is gripped by the external conductor portion.
The change in the shape of the inner surface of the sleeve 105 when gripped by the outer conductor portion corresponds to the change in the shape of the outer conductor 103 covered with the sleeve 105. Therefore, it is important that the sleeve 105 has such a strength that the shape of the inner surface of the sleeve 105 does not change.
The strength of such a sleeve 105 comprehensively takes into consideration the density of the conductive material constituting the sleeve 105, the size (length, outer diameter, etc.) of the sleeve 105, the position and area of the crimped portion of the sleeve 105, and the like. Can be determined. As one example, when the inner diameter of the inner insulator 102 is 0.2 mm, the thickness of the sleeve 105 made of phosphor bronze can be set to 0.06 mm.

  1 and 2, as the best mode, a form in which the thickness of the sleeve 105 is uniform throughout the sleeve 105 is expressed, but the present invention is not limited to this.

Next, FIG. 3B shows another example of a configuration having a strength determined so that the inner surface shape of the sleeve 105 does not change.
In the coaxial cable 200 shown in FIG. 3B, the sleeve 210 is formed of a cylindrical member having a substantially U-shaped cross section, for example. A gap 210 x is formed between one end 210 a and the other end 210 b of the sleeve 210. The gap 210x extends in the extending direction of the coaxial cable 200, and is formed with a larger interval than the diameter of the outer surface 103a of the outer conductor 103 of the coaxial cable 200. Therefore, even a thin coaxial cable can be easily inserted into the sleeve 210 from the radial direction.
Further, in this coaxial cable 200, the sleeve 210 is formed such that a gap 210y is generated between the outer surface 103a of the outer conductor 103 and the inner surface 210c of the sleeve 210. In this state, the conductive fixing agent 220 (solder) is applied not only to the gap 210x but also to the gap 210y, and the coaxial cable 200 and the sleeve 210 are fixed in the circumferential direction. Therefore, it is possible to prevent the coaxial cable 100 from coming off in the extending direction D, and to have such strength that the shape of the inner surface 210c does not change when the sleeve 210 is gripped by the outer conductor portion.

(Second method)
As a second method, the sleeve 105 can be configured to absorb the force received by the external conductor portion. That is, the sleeve 105 can be deformed so as to absorb the force received by the external conductor portion so as to prevent the force received by the external conductor portion from reaching the external conductor 103.

One example relating to a configuration in which the sleeve 103 absorbs the force received by the external conductor is shown in FIG. 3A. As shown in FIG. 3A, the outer surface 105d of the sleeve 105 is formed with a plurality of convex portions 105e protruding from the outer surface. That is, the plurality of convex portions 105e form a protruding outer surface. Here, as an example, the plurality of convex portions 105e are formed at predetermined intervals. Each of these convex portions 105e may be provided in a dot shape on the outer surface 105d, or may be provided so as to form a bar shape extending horizontally or vertically in the extending direction of the sleeve 105. According to this configuration, when the outer conductor portion caulks the sleeve 105, the outer conductor portion mainly abuts on the convex portion 105e and does not abut on other portions. Therefore, the convex portion 105e mainly undergoes plastic deformation. Do (collapse). Since there are gaps between the plurality of adjacent convex portions 105e, the convex portions 105e can be plastically deformed so as to escape into the gaps when crimped. This prevents the convex portion 105e from being plastically deformed in the direction toward the inner surface 105c of the sleeve 105. That is, the plastic deformation caused by caulking is absorbed between the exterior surface of the sleeve 105 105d (including an outer surface 105e ₁ of the convex portion 105e) and the inner surface 105c, it falls short of the outer conductor 103 and thus the inside insulator 102 . Thus, since the sleeve 105 can absorb the force received by the external conductor portion, it is possible to suppress the force received by the external conductor portion from reaching the external conductor 103.

Next, FIG. 3B shows another example relating to a configuration in which the sleeve 105 absorbs the force received by the external conductor portion.
In the coaxial cable 200 shown in FIG. 3B, the sleeve 210 is formed of a cylindrical member having a substantially U-shaped cross section, for example. A gap 210 x is formed between one end 210 a and the other end 210 b of the sleeve 210. The gap 210x extends in the extending direction of the coaxial cable 200.
In the coaxial cable 200, a gap 210y is provided between the outer surface 103a of the outer conductor 103 and the inner surface 210c of the sleeve 210. In this state, the conductive fixing agent 220 (conductive adhesive) is applied not only to the gap 210x but also to the gap 210y.
Even in this configuration, it is preferable that the sleeve 210 has such a strength that the shape of the inner surface 210c does not change when the sleeve 210 is gripped by the outer conductor portion. Furthermore, even if the shape of the inner surface 210c changes due to the gripping of the sleeve 210, for example, even if the shape of the inner surface 210c changes so that the one end 210a and the other end 210b approach each other, the inner surface 210c of the sleeve 210 is changed. Since the gap 210y is provided between the outer conductor 103 and the outer surface 103a of the outer conductor 103, the outer conductor portion is subjected to a greater force before the deformation of the inner surface 210c changes the shape of the outer surface 103a of the outer conductor 103 The sleeve 210 needs to be gripped. In other words, the force applied to the sleeve 210 by the outer conductor portion is that the sleeve 210 is deformed and the fixing agent 220 applied between the inner surface 210c and the outer surface 103a of the outer conductor 103 is compressively deformed. Is absorbed by.
Thus, since the sleeve 105 can absorb the force received by the external conductor portion, it is possible to suppress the force received by the external conductor portion from reaching the external conductor 103.
In FIG. 3B, a space 210y is provided between the inner surface 210c of the sleeve 210 and the outer surface 103a of the outer conductor 103. If the fixing agent 220 is applied to the space 210y, the sleeve 210 is substantially C-shaped. It is good also as having a cross-sectional shape.

The configuration of the coaxial cable according to the present invention has been described above.
Next, an example of a coaxial connector using the coaxial cable according to the present invention, that is, a coaxial connector with a coaxial cable will be described.

  FIG. 4 is a perspective view showing an appearance of a coaxial connector with a coaxial cable according to an embodiment of the present invention. FIG. 5A is a perspective view showing a state where the coaxial cable and the coaxial connector in the coaxial connector with the coaxial cable shown in FIG. 4 are separated, and FIG. 5B is a diagram with the coaxial cable shown in FIG. It is a perspective view shown by the state where the coaxial cable and coaxial connector in a coaxial connector were engaged. 6 (a) is a diagram showing the top surface of the coaxial connector with coaxial cable shown in FIG. 4, and FIG. 6 (b) is a diagram showing the side of the coaxial connector with coaxial cable shown in FIG. FIG.6 (c) is a figure which shows the side surface of the other party connector engaged with the coaxial connector with a coaxial cable shown in FIG. Fig.7 (a) is a figure which shows the cross section along the AA 'line of the coaxial connector with a coaxial cable shown to Fig.6 (a), FIG.7 (b) is shown in FIG.6 (c). It is a figure which shows the cross section of the other party connector. FIG. 8A is a view showing a cross section taken along line BB ′ of the coaxial connector with a coaxial cable shown in FIG. FIG. 8B is a diagram showing a cross section of a coaxial connector using the coaxial cable shown in FIG. 3B. FIG. 9 is a perspective view showing the configuration of the mating connector shown in FIGS. 6 (c) and 7 (b).

  As shown in FIGS. 4 to 6, the coaxial connector with coaxial cable 400 according to the embodiment of the present invention mainly includes the coaxial cable 100 and the coaxial connector 500.

  The coaxial cable 100 is the same as the coaxial cable described with reference to FIG.

  The coaxial connector 500 includes a shell 530 that is an outer conductor portion including a base member 510 and a lid portion 520, an insulating seat 540 accommodated in the shell 530, and a female terminal 550 accommodated in the insulating seat 540.

The female terminal 550 is electrically connected to the linear conductor 101 of the coaxial cable 100 as shown in FIGS. 5 (a) and 5 (b). The female terminal 550 includes a connecting portion 550a extending in the extending direction of the linear conductor 101, and a contact portion 550b formed integrally with the connecting portion 550a by a conductive elastic material. The contact portion 550b has two contact plates 550b ₁ and 550b ₂ that extend in a direction perpendicular to the extending direction of the connecting portion 550a and face each other. The two contact plates 550b ₁ , 550b ₂ are configured such that the distance between them decreases as they proceed downward.

  The insulating seat 540 is made of an insulating material, and accommodates the female terminal 550 along the shape of the accommodating portion 540a along the shape of the connecting portion 550a of the female terminal 550 and the shape of the contact portion 550b of the female terminal 550. Storage portion 540b. FIG. 5B shows a state in which the connecting portion 550a and the contact portion 550b of the female terminal 550 are accommodated in the accommodating portion 540a and the accommodating portion 540b, respectively.

Shell 530 as an outer conductor portion includes base portion 510 and lid portion 520.
First, as shown in FIGS. 5A and 5B, the base portion 510 includes a cylindrical outer base portion 512 made of a conductive material. The outer base portion 512 accommodates an insulating seat 540 therein.

  On the other hand, the lid portion 520 is made of a conductive material, and is electrically and mechanically connected to the outer base portion 512 of the base portion 510 by the connecting portion 522. The lid portion 520 is configured to cover the upper surface of the base portion 510 when the connection portion 522 is bent. Further, the lid portion 520 holds and fixes the coaxial cable 100 when the connection portion 522 is bent. The sleeve 105 of the coaxial cable 100 is held and is configured to be electrically connected to the outer conductor 103. Specifically, the lid portion 520 includes a lid member 524 for covering the housing portion 540 a and the housing portion 540 b of the insulating seat 540 housed in the base portion 510, and a sleeve grip portion 526 for gripping the sleeve 105 of the coaxial cable 100. And an outer skin gripping part (second gripping part) 528 for gripping the outer skin 104 of the coaxial cable 100.

  In the above configuration, the outer base portion 512 and the lid portion 520 of the base portion 510 are both made of a conductive material, and both are electrically connected. Therefore, these function as the “outer conductor portion” described above.

  As shown in FIG. 5B, in the state where the insulating seat 540 is accommodated in the outer base portion 512 of the base portion 510 and the coaxial cable 100 is accommodated in the insulating seat 540, the connecting portion 522 of the lid portion 520. As shown in FIGS. 4, 6 and 7, the lid member 524 of the lid portion 520 can cover the female terminal 550 attached to the coaxial cable 100. Thereafter, as shown in FIG. 8A, the sleeve gripping portion 526 of the lid portion 520 grips the sleeve 105 of the coaxial cable 100 (note that the sleeve gripping portion 526 of the lid portion 520 is shown in FIG. An example of gripping the sleeve 210 of the coaxial cable 200 shown in FIG. 3B is shown). Further, as shown in FIGS. 4, 6, and 7, the outer skin gripping portion 528 of the lid portion 520 grips the outer skin of the coaxial cable 100. As apparent from these drawings, the outer skin gripping portion 528 is located outside the sleeve gripping portion 526.

  The sleeve gripping portion 526 of the lid portion 520 crimps and grips the sleeve 105. Here, paying attention to the sleeve 105, as described above, the gap 105 x formed in the sleeve 105 is sealed with the fixing agent 106, so that the sleeve 105 has a hollow tubular shape as a whole. Thereby, the sleeve 105 improves the durability in the radial direction. Furthermore, as described above, the sleeve 105 is configured so as not to substantially deform the outer shape of the outer conductor 103 when being gripped by the sleeve gripping portion 526. As a result, the outer conductor 103 of the coaxial cable 100 and the shape of the inner insulator 102 are prevented from changing.

  Thus, by connecting the coaxial cable 100 and the coaxial connector 500, the coaxial connector 400 with the coaxial cable as shown in FIGS. 4, 6, and 7 is completed. In this coaxial connector with coaxial cable 400, as is apparent from FIG. 7A in particular, the outer conductor 103 of the coaxial cable 100 and the shell 530 that is the outer conductor portion of the coaxial connector 500 are connected to the sleeve 105 of the coaxial cable 100. Electrically connected.

  Further, as shown in FIG. 7A, the inner diameter of the outer skin gripping portion 528 is smaller than the outer diameter of the sleeve 105. In other words, the outer diameter of the sleeve 105 is larger than the inner diameter of the outer skin gripping portion 528. Therefore, for example, even when the coaxial cable 100 is advanced leftward by being pulled in the leftward direction in FIG. 7A, the rear end surface 105A of the sleeve 105 is the front end surface 528A of the outer skin gripping portion 528. Therefore, it is possible to prevent the coaxial cable 100 from moving to the left. Thereby, the coaxial cable 100 is prevented from coming off the connector block 500.

  Heretofore, an example of the coaxial connector using the coaxial cable according to the present invention has been described. Up to this point, a coaxial cable attached with a coaxial connector has been referred to as a “coaxial connector with a coaxial cable”, but a coaxial cable attached with a coaxial connector can also be regarded as a “coaxial connector”.

  Furthermore, an example of the mating connector that engages with the coaxial connector 400 described above will be described.

  As shown in FIG. 9, the mating connector (receptacle) 900 is mainly composed of a base portion 902 having a plate shape, a cylindrical conductor portion 904 placed on the upper surface of the base portion 902, and a base portion 902. And a cylindrical terminal 906 placed on the upper surface of the. Note that the conductor portion 904 and the terminal 906 are electrically insulated by an insulating plate 902a placed on the upper surface of the base portion 902.

As shown in FIG. 7, a groove that engages with a groove formed on the inner surface of the outer base portion 512 of the connector block 500 is formed on the outer surface of the conductor portion 904. As shown in FIGS. 7 and 9, a spherical surface is formed on the upper portion of the terminal 906 which is a signal terminal. With this configuration, when the conductor portion 904 of the counterpart connector 900 is completely inserted into the outer base portion 512 of the coaxial connector 500, the conductor portion 904 and the outer base portion 512 are electrically connected. Further, the two contact plates 550b ₁ , 550b ₂ (see FIG. 5A) of the female terminal 550 attached to the coaxial cable 100 are bent while increasing the distance between them, so that the outer surface of the terminal 906 is made. It abuts against this outer surface in a pressed state. As a result, the female terminal 550 attached to the coaxial cable 100, that is, the linear conductor 101 that is the central conductor of the coaxial cable 100 and the terminal 906 of the counterpart connector 900 are electrically connected.
The example of the counterpart connector has been described above.

  Next, a method for manufacturing a coaxial cable used in the coaxial connector described above will be described. FIG. 10 is a diagram showing a method for manufacturing a coaxial cable used in the coaxial connector according to one embodiment of the present invention.

  First, as shown in FIG. 10A, a coaxial cable 1000 is prepared. The coaxial cable 1000 includes an inner insulator 1020 that covers the outer surface of the linear conductor 1010, a conductive outer conductor 1030 that contacts the outer surface of the inner insulator 1020 and covers the outer surface, and an outer skin that covers the outer surface of the outer conductor 1030. (External insulator) 1040.

Next, the carrier 2000 is prepared. The carrier 2000 is made of a strip-like conductive material. At one end 2002 of the carrier 2000, a plate-like connecting portion 2010 protruding from the one end 2002 is formed. A cylindrical member 2020 having, for example, a substantially C-shaped cross section (which may be a substantially U-shaped cross section) is formed at the distal end of the connecting portion 2010. A gap 2025 is formed between one end 2022 and the other end 2024 of the cylindrical member 2020. The gap 2025 communicates with a region surrounded by the inner surface 2026 of the cylindrical member 2020. Although not shown in the figure, a notch (notch) is formed along the boundary between the cylindrical member 2020 and the connecting portion 2010.
The carrier 2000 having such a configuration can be formed by the following process, for example. That is, by first punching a band plate member formed of a conductive material by pressing, the cylindrical member 2020 is not a cylindrical member but a rectangular member (that is, a plate member) 2020A. A carrier is formed. Next, a notch is formed along the boundary between the rectangular member 2020 </ b> A and the connecting portion 2010. Thereafter, the rectangular member 2020A is curved so that the inner surface 2026 connecting the one end 2022 and the other end 2024 of the rectangular member 2020A forms a shape along the outer surface of the outer conductor 1030 of the coaxial cable 1000. Thereby, the rectangular member 2020A becomes the cylindrical member 2020 shown in FIG.

  Next, the coaxial cable 1000 is engaged with the carrier 2000 so that the outer surface of the outer conductor 1030 exposed without being covered by the outer skin 1040 of the coaxial cable 1000 faces the inner surface 2026 of the cylindrical member 2020 of the carrier 2000. . Such engagement is realized by inserting the outer conductor 1030 of the coaxial cable 1000 from the gap formed in the cylindrical member 2020 of the carrier 2000 (gap 2025 located between the one end 2022 and the other end 2024). Is possible. Alternatively, such engagement is performed by inserting the linear conductor 1010 at the tip of the coaxial cable 1000 into a region surrounded by the inner surface 2026 of the cylindrical member 2020 of the carrier 2000 (that is, inside the cylindrical member 2020). It is also possible to realize this by moving the coaxial cable 1000 along the extending direction of the cylindrical member 2020 in the state. A state where the coaxial cable 1000 is engaged with the cylindrical member 2026 of the carrier 2000 is represented in FIG.

  Thereafter, the adhesive 2040 is applied to the gap 2025 formed in the tubular member 2020, whereby the coaxial cable 1000 is fixed to the tubular member 2020 as shown in FIG. Alternatively, the coaxial cable 1000 can be fixed to the cylindrical member 2020 by applying an adhesive between the outer conductor 1030 of the coaxial cable 1000 and the inner surface 2026 of the cylindrical member 2020 (see FIG. 3B).

  Next, by applying a force along the direction Y perpendicular to the extending direction X of the coaxial cable 1000 to the coaxial cable 1000, the cylindrical member 2020 and the connecting portion 2010 are formed at the boundary between them. Separated along the notch. Thereby, as shown in FIG.10 (d), the coaxial cable 1000 with which the cylindrical member 2020 was fixed is formed.

  Next, the female terminal 2060 is attached to the linear conductor 1010 by soldering or the like. This female terminal is the same as the female terminal 107 described above with reference to FIG.

Here, for the sake of simplification of explanation, the case where the carrier 2000 in which one set of the connecting portion 2010 and one cylindrical member 2020 (rectangular member 2020A before being bent) is used has been described. .
However, the present invention is not limited to this. That is, for example, a carrier in which a plurality of sets of coupling portions 2010 and a rectangular member 2020A are formed along one end 2002 can be used as the carrier. In this case, the step of bending the rectangular member 2020A into the cylindrical member 2020 (FIG. 10A), the step of engaging the coaxial cable 1000 with the carrier (FIG. 10B), and the coaxial cable 1000 The step of fixing the carrier to the carrier (FIG. 10C) and the step of separating the coaxial cable 1000 from the carrier (FIG. 10D) include a predetermined set of connecting portions 2010 and a rectangular member 2020A (or a cylindrical member 2020). ) Can be executed collectively.

  The coaxial cable manufactured as described above is attached to the coaxial connector by the method described with reference to FIG. As a result, the coaxial connector with coaxial cable (that is, the coaxial connector) shown in FIGS. 4, 6, and 7 is completed.

As described above, in the present invention, a cylindrical member as a conductive sleeve having a gap extending in the extending direction of the coaxial cable is prepared, and the cylindrical member has an inner surface of the cylindrical member outside the coaxial cable. The cylindrical member is attached to the coaxial cable so as to directly contact the outer surface of the conductor (or indirectly contact via the conductive fixing agent). At this time, since the cylindrical member can receive the coaxial cable from the formed gap, it is easily attached to the coaxial cable.
After the cylindrical member is mounted on the coaxial cable, the inner peripheral surface of the cylindrical member is continuously and completely connected by filling the gap between the cylindrical members with an adhesive such as solder. Therefore, the durability against the deformation of the cylindrical member from the radial direction is enhanced. Thereby, even if a cylindrical member receives the holding | grip by the holding part formed in the shell of a coaxial connector, it does not deform | transform easily. As a result, the impedance characteristics (especially high frequency characteristics) of the coaxial cable are good without damaging the coaxial cable, even if the gripping part formed on the shell is a type of coaxial connector that crimps the coaxial cable and holds the coaxial cable. Can be kept in. Since the size of the cylindrical member is easily determined according to the size of the outer conductor of the coaxial cable, such an effect can be reliably obtained without depending on the size of the coaxial cable used. That is, even when a small-sized coaxial cable is used, it is possible to provide a coaxial connector that can maintain good impedance characteristics of the coaxial cable.

  Therefore, according to the present invention, it is possible to provide a coaxial connector that can be miniaturized while ensuring good impedance characteristics.

FIG. 1 is a perspective view showing a configuration of a coaxial cable according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing a cross section along the line AA ′ of the coaxial cable shown in FIG. 1. FIG. 3A is a diagram schematically showing a cross section of a coaxial cable as one configuration example of a sleeve in the coaxial cable according to the embodiment of the present invention. FIG. 3B is a diagram schematically showing a cross section of the coaxial cable as another configuration example of the sleeve in the coaxial cable according to the embodiment of the present invention. 1 is a perspective view showing an appearance of a coaxial connector with a coaxial cable according to an embodiment of the present invention. FIG. 5A is a perspective view showing a state where the coaxial cable and the coaxial connector in the coaxial connector with the coaxial cable shown in FIG. 4 are separated, and FIG. 5B is a diagram with the coaxial cable shown in FIG. It is a perspective view shown by the state where the coaxial cable and coaxial connector in a coaxial connector were engaged. 6 (a) is a diagram showing the top surface of the coaxial connector with coaxial cable shown in FIG. 4, and FIG. 6 (b) is a diagram showing the side of the coaxial connector with coaxial cable shown in FIG. FIG.6 (c) is a figure which shows the side surface of the other party connector engaged with the coaxial connector with a coaxial cable shown in FIG. Fig.7 (a) is a figure which shows the cross section along the AA 'line of the coaxial connector with a coaxial cable shown to Fig.6 (a), FIG.7 (b) is shown in FIG.6 (c). It is a figure which shows the cross section of the other party connector. FIG. 8 is a cross-sectional view taken along the line BB ′ of the coaxial connector with a coaxial cable shown in FIG. FIG. 8B is a diagram showing a cross section of a coaxial connector using the coaxial cable shown in FIG. 3B. FIG. 9 is a perspective view showing the configuration of the mating connector shown in FIGS. 6 (c) and 7 (b). FIG. 10 is a diagram showing a method for manufacturing a coaxial cable used in the coaxial connector according to one embodiment of the present invention.

Explanation of symbols

100, 1000 Coaxial cable 101, 1010 Linear conductor 101a Linear conductor outer surface 102, 1020 Internal insulator 102a Internal insulator outer surface 103, 1030 External conductor 103a External conductor outer surface 104, 1040 External insulator (skin)
105 Sleeve (tubular member)
105a inner surface of the other end 210c sleeve end 105b end 210b sleeve at the other end 105c outer surface 105x gap 106,220,2040 binder 210 sleeve 210a sleeve outer surface 105e protrusions 105e ₁ convex portion of the inner surface 105d sleeve of the sleeve of the sleeve of the sleeve 210x gap 210y gap 400 Coaxial connector with coaxial cable (coaxial connector)
500 Coaxial connector 510 Base portion 512 Outer base portion 520 Lid portion 522 Connection portion 524 Lid member 526 Sleeve grip portion 528 Skin grip portion (second grip portion)
530 shell (outer conductor)
540 Insulating seat 550 Female terminal 2000 Carrier 2002 One end 2010 Connecting portion 2020 Cylindrical member 2020A Rectangular member 2022 One end of the cylindrical member (rectangular member) 2024 The other end of the cylindrical member (rectangular member) 2025 Cylindrical member (rectangular) Gap 2026 Inner surface of cylindrical member (rectangular member)

Claims (11)

An inner insulator that covers the outer surface of the linear conductor, an outer conductor that contacts the outer surface of the inner insulator and covers the outer surface, and a coaxial cable having an outer insulator that covers the outer surface of the outer conductor;
A conductive cylindrical member that covers an outer surface of the outer conductor that is exposed without being covered by the outer insulator and that has a gap extending in the extending direction of the coaxial cable. A cylindrical member fixed to the outer conductor by being
A metallic shell attached to the coaxial cable so as to accommodate one end of the coaxial cable and having a gripping part for gripping the tubular member;
Comprising
The said cylindrical member is comprised so that it may not deform | transform substantially the shape of the said external conductor, when it is hold | gripped by the said holding part.   The coaxial connector according to claim 1, wherein the cylindrical member has a strength determined so that the shape of the inner surface of the cylindrical member is not deformed when the cylindrical member is gripped by the grip portion.   The coaxial connector according to claim 1, wherein the cylindrical member is configured to absorb a force received by the grip portion.   The coaxial connector according to claim 3, wherein the cylindrical member has a convex portion protruding from an outer surface thereof.   The coaxial member according to any one of claims 1 to 4, wherein the cylindrical member is fixed to the outer conductor by applying an adhesive between an inner surface of the cylindrical member and the outer conductor. connector.   The coaxial connector according to claim 1, wherein the fixing agent is a solder or a conductive adhesive.   The said cylindrical member is formed by curving this plate-shaped metal member so that the inner surface which connects one end and the other end of a plate-shaped metal member may follow the outer surface of the said exposed external conductor. The coaxial connector according to claim 6.   The coaxial connector according to any one of claims 1 to 7, wherein the inner insulator has an outer diameter of 0.1 mm to 0.2 mm.   The coaxial connector according to any one of claims 1 to 8, wherein the shell has a second grip portion that has an inner diameter smaller than an outer diameter of the cylindrical member and is located outside the grip portion. Preparing an internal insulator that covers the outer surface of the linear conductor, an outer conductor that contacts the outer surface of the inner insulator and covers the outer surface, and a coaxial cable having an outer insulator that covers the outer surface of the outer conductor;
A carrier having a connecting portion protruding from one end and a conductive rectangular member connected to the connecting portion, the carrier having a notch formed along a boundary between the connecting portion and the rectangular member. The stage of preparation,
Curving the rectangular member such that an inner surface connecting one end and the other end of the rectangular member of the carrier forms a shape along the outer surface of the outer conductor of the coaxial cable;
Engaging the coaxial cable with the front carrier so that the outer surface of the outer conductor exposed without being covered by the outer insulator of the coaxial cable is opposed to the inner surface of the curved rectangular member of the carrier; ,
Fixing the curved rectangular member to the coaxial cable by applying an adhesive between the one end and the other end of the curved rectangular member;
Separating the curved rectangular member and the connecting portion along the notch;
The manufacturing method of the coaxial connector characterized by the above-mentioned. Preparing the carrier includes preparing a carrier having a plurality of the rectangular members disposed at predetermined intervals along the one end;
The bending step, the engaging step, the fixing step, and the separating step include a predetermined number of the connecting portions, the predetermined number of the rectangular members, and the predetermined number of the rectangular shapes. The manufacturing method of Claim 10 performed collectively with respect to.

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