JP2009259500A - Grounding structure of coax connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grounding structure of a coax connector capable of preventing an increase of parts count, weight, contour hypertrophy and have a good yield. <P>SOLUTION: A guide/connection protrusion part 24 of an external conductor terminal 2 is inserted into a connection protrusion guide slot 31 and also a contact section for grounding 3 of the external conductor terminal 2 is inserted into a contact section guide 30. A part of the contact section for grounding protrudes to a bracket insertion coupling section 9. The insertion coupling of the coax connector and the bracket 1 by means of the bracket insertion coupling section 9 of the housing 8 completes the securing of the coax connector. The coax connector can take body grounding by means of the contact section for grounding 3, integrated with the external conductor terminal 2, contacting the bracket 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a ground structure for a coaxial connector.

  A coaxial cable used for high-frequency signal transmission such as an antenna wire generally includes a core wire as a central conductor, an insulator as a dielectric, a metal tape conductor and a braid as an outer conductor, and an insulating sheath as an outer sheath. In order from the center. The coaxial cable having such a configuration is provided with a coaxial connector at the terminal in order to connect to a counterpart device, a coaxial cable, or the like.

The coaxial connector has an inner conductor terminal and an insulator that accommodates the inner conductor terminal, and an outer conductor terminal for blocking electrical noise such as electromagnetic waves and static electricity outside the insulator. The coaxial connector disclosed in the following Patent Document 1 is configured to be fixed to a body of an automobile or the like through a bracket and to be grounded through a ground terminal and the bracket. The ground terminal is provided as one component or a part integrated with the bracket. The ground terminal is in contact with the outer conductor terminal, thereby enabling body grounding.
Japanese Patent Laid-Open No. 11-67362

  In the coaxial connector disclosed in Patent Document 1, when the ground terminal is provided as one component part of the connector, the number of parts increases, which causes cost increase and complicated parts management. On the other hand, when the grounding terminal is provided integrally with the bracket, the bracket is generally rigid and thick, which causes weight increase and external enlargement. It is difficult to remove and this is a big thing in the part like the ground terminal). When the ground terminal is provided integrally with the bracket, it is considered that the yield is poor with the bracket shape disclosed in Patent Document 1.

  The present invention has been made in view of the circumstances described above, and provides a grounding structure for a coaxial connector that can prevent an increase in the number of parts, an increase in weight, and an external enlargement, and that can improve the yield. The task is to do.

  The ground structure of the coaxial connector of the present invention according to claim 1, which has been made to solve the above problems, includes an inner conductor terminal connected to the core wire of the coaxial cable, and an outer conductor terminal connected to the braid of the coaxial cable. One or more coaxial connector subassemblies including an inner conductor terminal and an insulator provided between the inner conductor terminal and the outer conductor terminal. Further, the coaxial connector subassembly is accommodated and fixed and fitted into a conductive bracket. And the outer conductor terminal integrally has a ground contact portion projecting in a direction orthogonal to the terminal axis of the outer conductor terminal, and the ground contact portion includes the bracket or It is characterized by being in contact with adjacent outer conductor terminals.

  According to the present invention having such a feature, the ground contact portion is integrated with the outer conductor terminal connected to the braid of the coaxial cable, and the ground contact portion contacts the bracket or the adjacent outer conductor terminal. It becomes possible to take earth. According to the present invention, since the ground contact portion is integrated with the outer conductor terminal, the number of parts does not increase, and the outer conductor terminal is usually formed by processing a thin metal plate. Even if the contact parts are integrated, weight increase and external enlargement can be avoided as much as possible.

  A grounding structure for a coaxial connector according to a second aspect of the present invention is the grounding structure for the coaxial connector according to the first aspect, wherein the ground contact portion has a spring structure.

  According to the present invention having such a feature, the contact property to the bracket or the adjacent outer conductor terminal is improved by the spring structure.

  The grounding structure of the coaxial connector according to a third aspect of the present invention is the grounding structure of the coaxial connector according to the first or second aspect, wherein the outer conductor terminal is positioned 180 ° opposite to the ground contact portion. And a guide and connection convex portion which is a guide portion for the housing and a connection portion for the ground contact portion of the adjacent outer conductor terminal.

  According to the present invention having such a feature, adjacent outer conductor terminals can be grounded by contact between the ground contact portion and the guide / connection convex portion.

  The ground structure of the coaxial connector according to claim 4 of the present invention is the ground structure of the coaxial connector according to any one of claims 1 to 3, wherein the ground contact portion is an outer conductor terminal developed shape before bending. In this state, it is formed so as to be aligned with the caulking piece for the coaxial cable, and is formed to have a length shorter than the caulking piece or substantially the same length.

  According to the present invention having such a feature, the ground contact portion is formed so as to be aligned with the caulking piece, so that a portion that has become unnecessary in the past can be utilized (details for carrying out the invention). See best mode column).

  According to the first aspect of the present invention, by integrating the contact portion for grounding with the outer conductor terminal, it is possible to prevent the increase in the number of parts, the increase in weight, and the enlargement of the outer shape.

  According to the second aspect of the present invention, there is an effect that the contact portion for grounding having a good contact property can be obtained by the spring structure.

  According to the third aspect of the present invention, by integrating the guide / connecting convex portion with the outer conductor terminal, there is an effect that it is possible to satisfactorily ground even with multiple poles.

  According to the fourth aspect of the present invention, by forming the ground contact portion so as to line up with the crimping piece, and by forming the ground contact portion with a length matched to the crimping piece, There is an effect that the yield of the outer conductor terminals can be improved.

  Hereinafter, description will be given with reference to the drawings. 1A and 1B are views showing an embodiment of a grounding structure of a coaxial connector according to the present invention, in which FIG. 1A is a rear view of a housing in a state where outer conductor terminals and brackets are indicated by phantom lines, and FIG. It is a rear view of a conductor terminal. 2 to 5 are views of the outer conductor terminal, FIGS. 6 to 7 are views of the housing, and FIGS. 8 to 9 are views of the insulator assembly.

  In FIG. 1, the coaxial connector is fixed to a body such as an automobile via a bracket 1 and can be grounded by an outer conductor terminal 2 that contacts the bracket 1. The ground structure of the coaxial connector according to the present invention has a structure in which the ground contact portion 3 integrated with the outer conductor terminal 2 is brought into contact with the bracket 1. The bracket 1 is formed by pressing a thick metal plate having conductivity.

  The coaxial connector includes an insulator assembly 7 (see FIG. 8) including a coaxial cable 4 (see FIG. 8), an inner conductor terminal 5 (see FIG. 8), and an insulator 6 (see FIG. 8). A coaxial connector subassembly (not shown) is formed by being connected and fixed to 2, and the coaxial connector subassembly is assembled to the insulating housing 8. A bracket fitting portion 9 for the bracket 1 is formed in the housing 8.

  The coaxial connector is arranged at a position away from the body by a predetermined amount by forming a fitting state such that the bracket 1 is inserted into the bracket fitting portion 9, and with the insertion of the bracket 1. Then, the ground contact portion 3 of the outer conductor terminal 2 comes into contact with the bracket 1 so that the ground can be taken.

  In FIG. 8, the coaxial cable 4 is a well-known one, and includes a core wire 10 as a central conductor, an insulator 11 as a dielectric, a metal tape conductor 12 and a braid 13 as external conductors, and a sheath. The insulating sheath 14 is provided in order from the center. The coaxial cable 4 is processed so that the core wire 10 is exposed with a predetermined length. The braid 13 is folded back onto the insulating sheath 14 and processed so that it can be connected to the outer conductor terminal 2 (see FIGS. 1 to 4).

  The inner conductor terminal 5 is a metal member having conductivity, and has, for example, a pin-shaped electrical contact portion and a core wire connection portion 15 continuous to the electrical contact portion. The core wire connecting portion 15 is formed in a shape to be a pair of caulking pieces, and the core wire 10 of the coaxial cable 4 can be connected and fixed by caulking.

  The insulator 6 is a so-called dielectric, and is formed using a synthetic resin material having insulating properties. A held portion 16 is formed on the outer peripheral surface of the insulator 6 to be fixed to the outer conductor terminal 2 (see FIGS. 1 to 4). Before and after the held portion 16, annular flange portions 17 and 17 having a diameter larger than that of the held portion 16 are formed. In forming the coaxial connector subassembly, the held portion 16 is held by the outer conductor terminal 2 by crimping a pair of insulator holding crimping pieces 18 of the outer conductor terminal 2 as shown in FIG. It has come to be.

  1 to 4, the outer conductor terminal 2 is formed by forming a conductive metal plate into an outer conductor terminal developed shape 19 as shown in FIG. 5 and then bending it. An electrical contact portion 20 that is in electrical contact with an outer conductor terminal of a counterpart coaxial connector (not shown) is formed at the front portion of the outer conductor terminal 2. The electrical contact portion 20 is formed in a substantially semi-cylindrical shape. The substantially semi-cylindrical portion extends to the middle portion of the outer conductor terminal 2. The electrical contact portion 20 is formed with the pair of insulator holding caulking pieces 18. The pair of insulator holding caulking pieces 18 are formed so as to be continuous with the substantially semi-cylindrical end faces 21, 21.

  A pair of braided connecting crimping pieces 22 and a pair of sheath fixing crimping pieces 23 are formed at the rear of the outer conductor terminal 2. The pair of braid connecting caulking pieces 22 and the sheath fixing caulking piece 23 are arranged in a line in the front-rear direction. The pair of braid connecting caulking pieces 22 is formed so that the braid 13 (see FIG. 8) of the coaxial cable 4 can be connected and fixed by caulking. Further, the pair of sheath fixing caulking pieces 23 are formed so that the insulating sheath 14 (see FIG. 8) can be fixed by caulking.

  At the intermediate portion of the outer conductor terminal 2, the ground contact portion 3 and the guide / connection convex portion 24 are formed. The ground contact portion 3 and the guide / connection convex portion 24 are formed so as to protrude in a direction orthogonal to the terminal axis of the outer conductor terminal 2. The ground contact portion 3 is formed so as to be continuous with one of the substantially semi-cylindrical end faces 21, 21, and the guide / connecting convex portion 24 is continuous with the other. The ground contact portion 3 and the guide / connecting convex portion 24 are configured such that their protruding directions differ by 180 °.

  The ground contact portion 3 is formed as a portion to be brought into contact with the bracket 1 (or a portion to be brought into contact with the guide / connection convex portion 24 of the adjacent outer conductor terminal 2 in the case of multiple poles as shown in FIG. 10). The earth contact portion 3 is not particularly limited, but has a spring structure in this embodiment (a structure not having a spring structure is also possible). A spring portion 25 (spring structure) is formed by bending on the tip side of the ground contact portion 3 (for the spring structure, for example, a terminal material having spring properties such as brass, phosphor bronze, copper alloy for spring, etc. is used. (It is assumed that the shape of the illustrated spring portion 25 is an example). The ground contact portion 3 is formed so that a part thereof protrudes to the bracket fitting portion 9 of the housing 8.

  The contact portion 3 for grounding is formed at a position that improves the yield of the outer conductor terminals 2. Specifically, as can be seen from the outer conductor terminal development shape 19 shown in FIG. 5, it is formed in a portion that has become unnecessary in the prior art (the reference numeral in FIG. 5 corresponds to the portion after bending). And). The ground contact portion 3 is formed to be aligned with the braided connection crimping piece 22 in the state of the outer conductor terminal unfolded shape 19 before bending, and has a length substantially equal to that of the braided connection crimping piece 22. (In this embodiment, it is formed with a length that takes into account the spring portion 25).

  The guide / connection convex portion 24 is formed as a guide portion for the housing 8 (in addition to this, as shown in FIG. 10, a connection portion for the ground contact portion 3 of the adjacent outer conductor terminal 2). The guide / connection convex portion 24 is formed in a convex piece shape that is shorter in the protruding direction than the ground contact portion 3. As shown in FIGS. 1B and 3, the guide / connection convex portion 24 is disposed at a position lower than the ground contact portion 3 by the thickness of the terminal as viewed in the vertical direction of the drawing.

  1 (a), 6 and 7, the housing 8 has a connector fitting which is a fitting portion of a sub assembly housing portion 26 for housing and locking a coaxial connector sub assembly (not shown) and a mating coaxial connector (not shown). It has the joint part 27 and the bracket fitting part 9 used as the part fitted to the bracket 1. FIG.

  A lance 29 for hooking and locking the locked portion 28 of the outer conductor terminal 2 is formed in the sub-assembly housing portion 26. Further, the sub-assembly housing portion 26 is formed with a contact portion guide 30 for the grounding contact portion 3 of the outer conductor terminal 2 and a connection convex portion guide groove 31 for the guide / connection convex portion 24. The contact portion guide 30 is formed so as to communicate with the bracket fitting portion 9.

  In the above configuration, when a coaxial connector subassembly (not shown) is accommodated and locked in the subassembly accommodating portion 26 of the housing 8, the formation of the coaxial connector is completed. At this time, the guide / connection convex portion 24 of the outer conductor terminal 2 is inserted into the connection convex portion guide groove 31, and the ground contact portion 3 of the outer conductor terminal 2 is inserted into the contact portion guide 30. A part of the ground contact portion 3 protrudes from the bracket fitting portion 9.

  After the coaxial connector is formed, when the fitting to the bracket 1 is performed via the bracket fitting portion 9 of the housing 8, the fixing of the coaxial connector is completed. In the coaxial connector, since the part of the ground contact portion 3 comes into contact with the bracket 1, the body ground can be obtained.

  As described above with reference to FIGS. 1 to 10, according to the present invention, the ground contact portion 3 is integrated with the outer conductor terminal 2, and the ground contact portion 3 contacts the bracket 1. It has a grounding structure. Such a ground structure can be grounded. In the present invention, since the ground contact portion 3 is integrated with the outer conductor terminal 2, the ground can be taken without increasing the number of components. Since the outer conductor terminal 2 is usually formed by processing a metal thin plate, even if the ground contact portion 3 is integrated with the outer conductor terminal 2, an increase in weight and enlargement of the outer shape can be avoided as much as possible. In the present invention, an increase in the product number can be avoided by integrating the ground contact portion 3 with the outer conductor terminal 2. In addition, the present invention can also improve the yield of the outer conductor terminals 2.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the ground structure of the coaxial connector of this invention, (a) is a rear view of the housing in the state which showed the outer conductor terminal and the bracket with the virtual line, (b) is the outer conductor terminal. It is a rear view. It is a top view of an outer conductor terminal. It is a front view of an outer conductor terminal. It is sectional drawing of an outer conductor terminal. It is a figure of the outer conductor terminal expansion | deployment shape before the bending process of an outer conductor terminal. It is a perspective view of a housing. It is sectional drawing of a housing. It is a perspective view of an insulator assembly. It is a perspective view which shows the fixed state of an insulator assembly. It is a figure which shows the state which takes the earth | ground at the time of multipolar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bracket 2 Outer conductor terminal 3 Grounding contact part 8 Housing 9 Bracket fitting part 19 Outer conductor terminal deployment shape 22 Braiding connection crimping piece (crimping piece)
23 Caulking piece for fixing sheath (crimping piece)
24 Guide and connection convex part 25 Spring part (spring structure)
26 Subassembly housing portion 27 Connector fitting portion 29 Lance 30 Contact portion guide 31 Connection convex portion guide groove

Claims (4)

A coaxial connector sub including an inner conductor terminal connected to the core wire of the coaxial cable, an outer conductor terminal connected to the braid of the coaxial cable, and an insulator provided between the inner conductor terminal and the outer conductor terminal. One or a plurality of assemblies, and further comprising an insulating housing that accommodates and fixes the coaxial connector subassembly and is fitted to a conductive bracket, and the outer conductor terminal is a terminal shaft of the outer conductor terminal. A grounding structure for a coaxial connector, wherein a grounding contact portion protruding in an orthogonal direction is integrally formed, and the grounding contact portion contacts the bracket or an adjacent outer conductor terminal. In the ground structure of the coaxial connector according to claim 1,
The ground contact portion of the coaxial connector, wherein the ground contact portion has a spring structure. In the ground structure of the coaxial connector according to claim 1 or 2,
The outer conductor terminal is integrally provided with a guide / connection convex portion which is a guide portion for the housing and a connection portion for the ground contact portion of the adjacent outer conductor terminal at a position 180 ° opposite to the ground contact portion. A grounding structure for a coaxial connector, characterized by comprising: In the ground structure of the coaxial connector according to any one of claims 1 to 3,
The ground contact portion is formed so as to be aligned with the crimping piece with respect to the coaxial cable in a state where the outer conductor terminal is unfolded before bending, and is shorter or substantially equal in length to the crimping piece. A grounding structure for a coaxial connector, wherein

Images