JP5875902B2 - connector - Google Patents

Description

  The present invention relates to a connector, and more particularly to a coaxial connector having a two-layer structure having an inner shield layer and an outer shield layer.

  A technique for supplying power to a load device by a non-contact system is known. As a product to which such a technology is applied, a mobile phone charging system is generally spreading. Furthermore, in recent years, as a power supply system for electric vehicles, a non-contact power supply system has entered the stage of practical use, and various standards have been established.

  There are various types of non-contact power supply systems, but one of the types that attracts a great deal of attention as a power supply system for electric vehicles is the resonance-type non-contact power supply system, which is based on MIT (Massachusetts Institute of Technology). The basic principle has been developed and verified (for example, see Patent Document 1).

  Furthermore, various techniques have been proposed for realistic implementation. For example, there is a technique shown in FIG. 1 as a technique for reducing unnecessary radiated electromagnetic fields in a resonance type non-contact power feeding system. Specifically, in this technique, the metal case (inner shield case 201) on the power transmission side and the power reception side is covered with a metal shield (outer shield case 202) larger than them, and a strong electromagnetic field area between the resonance coils. The shield 202a is provided with a large metal plate. Further, the coaxial line 220 is covered with a metal shield 240, and the metal shield 240 is connected to a large metal shield (outer shield case 202). With such a configuration, a two-layer shield structure is realized in which the metal shield 240 covering the coaxial line 220 is connected to the casing of the high-frequency power source. In the case of this configuration, it is necessary to perform a shield connection while securing a two-layer structure in a connector portion that connects a transmission line (coaxial line 220) with a device such as a unit coil or a power supply device. More specifically, the outer conductor (braided layer) of the coaxial line 220 connected to the inner shield case 201 is insulated from the outer shield layer composed of the braided wire connected to the outer shield case 202 or the like. . Further, except for the opening of the coil, the outer shield structure is connected so as to completely cover the inner shield structure.

Special table 2009-501510

  Incidentally, in the connector portion, for example, a connection structure as shown in FIG. 2 is used as a structure for performing shield connection while ensuring the above-described two-layer structure. The coaxial connector must be attached from the inside of the outer shield case 202, but the outer shield layer (braided wire or the like) must be connected to the outer shield case 202 from the outside by a fixing bracket 207. There was a need for improvement. Specifically, as shown in the figure, the connection between the outer shield material 206 and the outer shield case 202 is performed by bending the shield material and expanding it radially so as to be sandwiched between the outer shield case 202 and the fixing bracket 207. Tightened by 208 to ensure conduction while at the same time ensuring electromagnetic shielding. At this time, it was necessary to process the outer shield layer at the installation location, and the work was not easy. The connection between the coaxial connector 203 attached to the inner shield case 201 and the coaxial connector 204 on the cable side needs to be performed inside the outer shield case 202, and the connection work of the outer shield material 206, which is the work outside, is performed. It was difficult to do at the same time and the work was complicated.

  The object of the present invention is made in view of such a situation, and is to provide a technique for solving the above-described problems.

An aspect of the present invention includes a cable-side connector for connecting a coaxial cable having a two-layer structure having an inner conductor, an inner shield layer, and an outer shield layer while maintaining the coaxial structure, and maintaining the coaxial structure with the cable-side connector. And a unit-side connector connected to a unit having a shield structure , wherein the shield structure includes an inner inner shield case and an outer outer shield case, and the unit side The connector has an outer unit side connector connected to the cable side connector, and an inner unit side connector connected to the unit. The outer unit side connector has an outer side from the center side toward the outside as a coaxial structure. A unit-side inner conductor, an outer unit-side intermediate conductor, and an outer conductor, and the inner unit-side connector Is provided with an inner unit side inner conductor and an inner unit side intermediate conductor from the center side toward the outer side as a coaxial structure. In the outer unit side connector, the outer unit side inner conductor is connected to the cable side connector at one end side. Is connected to the inner conductor of the coaxial line through the other end, and is connected to the inner unit side inner conductor at the other end, and the outer unit side intermediate conductor is connected to the coaxial line through the cable side connector at one end. Conducting to the inner shield layer, conducting to the inner unit side intermediate conductor at the other end, and connecting the outer conductor to the outer conductor of the coaxial line via the cable side connector at the other end. In the inner unit side connector, the inner unit side inner conductor is on the side opposite to the outer unit side connector. An internal conductor connecting means for conducting the said unit, the inner unit side intermediate conductors on the opposite side to the outer unit connector, electrically connected to the inner shield case.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which improves significantly the workability in an installation place regarding installation of the transmission line of a two-layer shield structure can be provided.

It is the figure which showed the outline | summary of the resonance type non-contact electric power feeding system based on background art. It is the figure which showed the connection structure of the connector part in the resonance type non-contact electric power feeding system based on background art. It is a figure of the connection structure of a transmission line (coaxial line) and a connector concerning an embodiment. It is a figure which shows the connection state to the shield case of the unit side connector based on embodiment. It is the figure which showed the example of the unit side connector from which the length of the inner unit side connector which concerns on embodiment differs. It is the figure which showed the connection state of the unit side connector when there is one shield case based on embodiment.

  Hereinafter, modes for carrying out the invention (hereinafter referred to as “embodiments”) will be described with reference to the drawings.

  FIG. 3 is a view showing a connection structure 99 between the transmission line (coaxial line 80) and the connectors (40, 50) according to this embodiment, and here, the internal structure is shown in an easy-to-understand manner. The connector used in the connection structure 99 includes a coil-side unit-side connector 40 and a cable-side connector 50 to which a transmission line is connected. The unit side connector 40 includes an outer unit side connector 60 and an inner unit side connector 70.

  A coaxial cable 80 having a two-layer structure is used as the transmission line. The coaxial line 80 has a shield layer (braided layer or the like) having a two-layer structure that is insulated on the inner side and the outer side. Specifically, as shown in the drawing, the coaxial line 80 includes a coaxial line inner conductor 1, a coaxial line inner insulator 2, a coaxial line intermediate conductor (inner shield layer) 3, and a coaxial line outside from the center side to the outer side. An insulator 4, a coaxial line outer conductor (outer shield layer) 5, and a coaxial line sheath 6 are provided. When connecting to the cable-side connector 50, terminal processing is performed so that each member is exposed as desired.

  In order to perform shielding while securing a two-layer structure, the cable-side connector 50 includes a cylindrical structure corresponding to the coaxial line 80 of the shield layer having the two-layer structure described above. Specifically, the cable-side connector 50 includes an inner conductor 7, an inner insulator 8, an intermediate conductor 9, an outer insulator 10, an outer conductor 11, and a housing 12 from the center side toward the outside.

  The inner conductor 7 provided at the center of the axis connects the coaxial line inner conductor 1 of the coaxial line 80. Further, a fitting portion 51 is formed at the end of the inner conductor 7 on the unit side connector 40 side (left side in the drawing) so as to sandwich and connect the inner conductor 13 of the unit side connector 40 when connected to the unit side connector 40. ing. The internal insulator 8 covers the internal conductor 7 with a predetermined thickness, and ensures insulation between the internal conductor 7 and the intermediate conductor 9. The intermediate conductor 9 is connected to the coaxial line intermediate conductor 3 by caulking. The external insulator 10 covers the intermediate conductor 9 with a predetermined thickness and ensures insulation from the external conductor 11. The outer conductor 11 is connected to the coaxial line outer conductor 5 by caulking. At this time, the caulking structure of the outer conductor 11 has a shape that also fixes the coaxial wire sheath 6.

  With such a structure and connection, the cable-side connector 50 to which the coaxial line 80 is connected also has a two-layered coaxial structure in which the structure of the coaxial line 80 is substantially continuous.

  In addition, the unit-side connector 40 to be connected by fitting with the cable-side connector 50 also has a two-layered coaxial structure. The unit side connector 40 includes two units, an outer unit side connector 60 and an inner unit side connector 70. The outer unit side connector 60 is fitted to the cable side connector 50 and fixed to the outer shield case 91. The inner unit side connector 70 is connected to the inner coil and is also connected to the inner shield case 92.

  Specifically, the outer unit side connector 60 includes an inner conductor 13, an inner insulator 14, an intermediate conductor 15, an outer insulator 16, an outer conductor 17, a housing 18, and a waterproof ring 19. Further, male screws 61 and 62 and a lock groove 63 are provided.

  The inner unit side connector 70 includes an inner conductor retaining nut 20, an intermediate conductor retaining nut 21, an inner conductor 22, an inner insulator 23, an intermediate conductor 24, a housing 25, an inner conductor connector 26, and an intermediate conductor connector 27. . Further, the inner unit side connector 70 includes a fitting portion 71, a female screw 72, a lock piece 73, and a male screw 74.

  The outer conductor 17 of the outer unit side connector 60 is connected to the outer shield case 91 and forms an outer shield layer. Further, the intermediate conductor 24 of the inner unit side connector 70 is connected to the inner shield case 92 to form an inner shield layer.

  The internal conductor 22 and the intermediate conductor 24 are, for example, threaded for connection with a coil or the like, and a round terminal or a bus bar terminal (corresponding to the internal conductor connection body 26 and the intermediate conductor connection body 27) is directly connected. It can be fixed.

  As with the inner unit side connector 70, the inner conductor 13 and the intermediate conductor 15 of the outer unit side connector 60 can fix round terminals and bus bar terminals, and can be used when the inner shield case 92 does not exist. .

  The other end of the inner unit side connector 70 can be directly connected to the outer unit side connector 60 by screwing or the like, and the inner conductor 13, the inner conductor 22, the intermediate conductor 15, and the intermediate conductor 24 are electrically connected. The interval between the inner shield case 92 and the outer shield case 91 is often different for each unit. Therefore, this can be dealt with by changing the length of the inner unit side connector 70 for each unit.

  The unit-side connector 40 (outer unit-side connector 60 and inner unit-side connector 70) and the cable-side connector 50 are insulated from each other by an inner conductor, an intermediate conductor, and an outer conductor. To ensure.

  The outer unit side connector 60 and the cable side connector 50 can be connected to three poles at the same time by one operation. The lock mechanism (lock piece 73 / lock groove 63) and the waterproof mechanism (waterproof ring 19) Incorporation is also possible.

  FIG. 4 shows a method for attaching the unit-side connector 40 and a method for connecting an internal device (such as a coil). The unit side connector 40 is inserted into the mounting hole of the outer shield case 91 and fixed to the outer shield case 91 using bolts 88 or the like. Here, the mounting bolt 88 is used. However, when importance is attached to the waterproof performance, a method of standing a stud bolt from the outer shield case 91, fitting the outer unit side connector 60, and fixing with a nut is used. Also good. By attaching in this way, the outer conductor 11 as a shield and the outer shield case 91 are in electrical contact, and an outer shield layer is formed.

  The inner unit side connector 70 connected to the outer unit side connector 60 is inserted into the mounting hole of the inner shield case 92 and fixed by the intermediate conductor retaining nut 21. A male screw 74 is formed on the surface of the intermediate conductor 24 (the outer peripheral surface near the end), and the inner shield case 92 is sandwiched by tightening the intermediate conductor retaining nut 21 to ensure the fixing and conduction of the connector. An inner shield layer is formed. In addition, although it fixes using the screw here, you may fix by fixed lock structures, such as a fitting type.

  For connection with an internal device (for example, a coil or the like) arranged inside the inner shield case 92, the inner conductor connecting body 26 is inserted into the male screw 75 at the tip of the inner conductor 22 of the inner unit side connector 70 for the inner conductor. Conduction is obtained using the retaining nut 20. Further, when the other conductor, the above-described intermediate conductor retaining nut 21 and intermediate conductor 24 are tightened, the intermediate conductor connection body 27 is sandwiched between them to obtain conduction. The internal conductor connection body 26 and the intermediate conductor connection body 27 can be directly attached with a bus bar-like conductor as a part of a coil or the like.

  FIG. 5 shows a connection method of the unit side connector 40, that is, a fixing structure between the outer unit side connector 60 and the inner unit side connector 70. FIG. 5A and FIG. 5B differ in the length of the inner unit side connector 70 (L1> L2). The outer unit side connector 60 is formed so that the cable side connector 50 is fitted from the right side in the figure. As an example of the connection method, in the outer unit side connector 60, a male screw 62 of about M3 is formed at the tip of the inner conductor 13. Further, in the inner unit side connector 70, a female screw 72 is formed at the left end of the inner conductor 22 (the side to which the outer unit side connector 60 is connected). The outer unit side connector 60 is screwed into the inner unit side connector 70 to be connected. At this time, the intermediate conductors 15 and 24 of the outer unit side connector 60 and the inner unit side connector 70 are brought into contact with each other, and two poles (inner conductor and intermediate conductor) can be connected. As a connection method, there are a method in which a screw is formed on an intermediate conductor as shown in the figure, and a method in which a fixed lock mechanism (63, 73) is provided on an external insulator for locking. In the drawing, both structures are shown, but either method may be used.

  Moreover, the space | interval of the inner side shield case 92 and the outer side shield case 91 may differ with the structure and structure of a unit. For example, the interval L2 in FIG. 5A is slightly shorter than that in FIG. 5B (<L1). Correspondingly, the length of the inner unit side connector 70 can be changed to cope with it. Here, the length l2 (<l1) of the housing 25 in FIG. 5B is shorter than the length l1 of the housing 25 in FIG.

  FIG. 6 shows a method of attaching the unit side connector 40 having a configuration in which the shield case 90 has only one layer. For example, when the transmission case (coaxial line 80) is assumed to be connected to the high-frequency power supply unit in FIG. 1, when the shield case 90 has one layer, the outer unit side connector 60 can be used alone.

  Since the tip of the inner conductor 13 of the outer unit side connector 60 is a male screw 62, the inner conductor connector 26 can be directly fixed and connected by the inner conductor retaining nut 20. Further, by attaching the intermediate conductor connecting body 27 using the intermediate conductor retaining nut 21, the intermediate conductor connecting body 27 and the intermediate conductor 24 are brought into contact with each other via the intermediate conductor retaining nut 21, thereby ensuring conduction. Further, the insulation between the internal conductor connection body 26 and the intermediate conductor connection body 27 can be secured by sandwiching the insulating plate 29 between the internal conductor connection body 26 and the intermediate conductor retaining nut 21.

  As described above, according to this embodiment, the two-layer shielded coaxial connector (unit side) includes an inner conductor, an intermediate conductor (shield), an outer conductor (shield), and an insulating structure between these conductors, and a housing that houses these conductors. The two-layer shield structure can be efficiently realized by the connector 40 and the cable side connector 50). In particular, the workability at the installation location can be greatly improved. Further, the connector connection work is facilitated by the integrated connector structure. Further, even in a unit where the distance between the inner shield case 92 and the outer shield case 91 is different, the outer unit side connector 60 having a more complicated structure can be shared by setting and preparing the inner unit side connector 70 having different lengths. Can be In a unit in which the outer shield case 91 and the inner shield case 92 are integrated, the connection can be made with only the outer unit side connector 60 alone.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those components and combinations thereof, and such modifications are also within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Coaxial line inner conductor 2 Coaxial line inner insulator 3 Coaxial line intermediate conductor 4 Coaxial line outer insulator 5 Coaxial line outer conductor 6 Coaxial line sheath 7, 13, 22 Inner conductor 8, 14, 23 Inner insulator 9,15, 24 Intermediate conductors 10, 16 External insulators 11, 17 External conductors 12, 18, 25 Housing 19 Waterproof ring 20 Internal conductor retaining nut 21 Intermediate conductor retaining nut 26 Internal conductor connector 27 Intermediate conductor connector 29 Insulating plate 40 Unit Side connector 50 Cable side connector 60 Outer unit side connectors 61, 62, 74, 75 Male thread 63 Lock groove 70 Inner unit side connector 71 Fitting portion 72 Female screw 73 Lock piece 80 Coaxial line 90 Shield case 91 Outer shield case 92 Inside Shield case 99 Connection structure

Claims (1)

A cable-side connector for connecting a coaxial cable having a two-layer structure having an inner conductor, an inner shield layer, and an outer shield layer while maintaining the coaxial structure, and being connected to the cable-side connector while maintaining the coaxial structure and having a shield structure A connector having a unit side connector connected to the unit having
The shield structure has an inner inner shield case and an outer outer shield case,
The unit side connector includes an outer unit side connector connected to the cable side connector, and an inner unit side connector connected to the unit.
The outer unit side connector comprises an outer unit side inner conductor, an outer unit side intermediate conductor, and an outer conductor from the center side toward the outer side as a coaxial structure,
The inner unit side connector includes an inner unit side inner conductor and an inner unit side intermediate conductor from the center side toward the outer side as a coaxial structure,
In the outer unit side connector, the outer unit side inner conductor is electrically connected to the inner conductor of the coaxial line via the cable side connector on one end side, and is electrically connected to the inner unit side inner conductor on the other end side.
The outer unit side intermediate conductor is electrically connected to the inner shield layer of the coaxial line via the cable side connector on one end side, and is electrically connected to the inner unit side intermediate conductor on the other end side,
The outer conductor is electrically connected to the outer conductor of the coaxial line through the cable side connector on one end side, and is electrically connected to the outer shield case on the other end side,
In the inner unit side connector, the inner unit side inner conductor includes an inner conductor connecting means that conducts to the unit on the opposite side of the outer unit side connector,
The inner unit side intermediate conductor is electrically connected to the inner shield case on the opposite side of the outer unit side connector.

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