JP2005056747A - Female contact plug of coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a female connector capable of correctly keeping a center conductor of a male connector at a coaxial position in a coaxial connector to accomplish a coaxial property of both the female and male connectors as a whole. <P>SOLUTION: This female contact plug pin of the coaxial connector is so structured that an elastic plate material having a conductivity is formed into a tubular body by being rounded; slits are formed at least two positions along the circumferential direction of the tubular body; at least two contact pieces 123 are formed by bending a part of a wall material of the tubular body in the inner circumferential direction of the tubular body; and a receiving hole for receiving the center conductor of the male coaxial contact piece is formed in the center part of the tubular body by the contact pieces. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coaxial connector for high-frequency equipment such as a TV receiving system, and more particularly to a female side plug.

  In the TV reception system, there is a development to CS broadcasting, and the transition to higher frequency is progressing, and the maximum frequency is close to 3 GHz.

  As a result, more stringent characteristics are required for the coaxial connector used to connect devices.

  In the coaxial connector, maintaining the coaxiality between the center conductor and the outer conductor is an important element for maintaining good characteristic impedance over a wide band, and a structure for realizing it is required.

  However, the conventional coaxial connector has an insufficient structure for holding the center conductor, and the coaxiality of the center conductor is not necessarily kept high with respect to the outer conductor.

  The present invention has been made in consideration of the above points, and the structure of the female connector is such that the central conductor of the male connector in the coaxial connector is correctly held at the coaxial position, and the coaxiality can be achieved as a whole of the male and female connectors. The purpose is to provide.

In order to achieve the above object, in the present invention,
A spring-like plate material having conductivity is rolled into a cylindrical body, and incisions are made in at least two locations along the circumferential direction of the cylindrical body, and a part of the wall material of the cylindrical body is the cylindrical shape. A coaxial connector in which at least two contact pieces are formed by bending in the inner circumferential direction of the body, and a receiving hole for receiving the center conductor of the male coaxial plug is formed in the center of the cylindrical body by the contact pieces. Female connector pin,
Is to provide.

  As described above, according to the present invention, since the receiving hole for receiving the central conductor of the male side plug is provided at the center of the cylindrical body of the coaxial connector, the central conductor of the male side plug can be correctly held at the center position. . And since it is the structure which maintains the coaxial property of the male and female both sides of a coaxial connector, a coaxial connector with a favorable frequency characteristic can be provided over a wide band.

  FIG. 1 shows the external shape of a signal distributor as an application example of a coaxial connector. Three female coaxial connector terminals 120 are provided on the outer peripheral surface of the case 110.

  FIGS. 2A and 2B show the overall shape of the coaxial connector and the elements incorporated in the connector, although the structure for fixing the case is different from that of FIG. This element accommodates a conductor 123 in contact with the male-side central conductor in the insulating holder 122, and uses the end of the conductor 123 as a terminal.

  FIG. 3 is a cross-sectional view showing the internal structure of the female-side coaxial connector 120 shown in FIG. The coaxial connector 120 is for housing the insulating holder 122 in the internal space of the metal shell 121.

  In the insulating holder 122, a conductor 123 that contacts a central conductor 210 (imaginary line) of the male coaxial connector is fitted. The conductor 123 has at least a pair of abutting pieces obtained by rounding a spring-like plate material into a cylindrical shape and bending it inwardly in order to make elastic contact with the male-side central conductor 210. The male side center conductor 210 is held at the center position of the coaxial connector.

  In order to fulfill this function, the coaxial connector plug pin of the present invention is formed by rounding a spring plate having conductivity into a cylindrical body, and making a notch to bend the wall material of the cylindrical body in the inner circumferential direction. Thus, a receiving hole for receiving the central conductor of the male coaxial connector is provided.

  FIG. 4 shows the structure of the connecting pin 123 in the female coaxial connector in which the detailed structures of the shell and the insulating holder are different from those in FIGS. 2 and 3.

The plug pin 123 forms a plug pin having an abutment piece by rounding a conductive spring-like plate material cut and bent into a cylindrical shape.

  The plug pin 123 is an end on the side that receives a central conductor of a male side plug while rounding a flat spring-like plate material, for example, using a die and forming a bent portion while forming a bent portion. And an end portion to be a terminal on the opposite side are processed and formed.

  The structure of the connecting pin 123 includes an opening end portion 123a, contact portions 123b and 123c, a base portion 123d, and a terminal portion 123e on the upper side in the drawing. And the opening edge part 123a is an edge part into which the center conductor of a male side plug is inserted, The inner peripheral edge is a slope so that a center conductor may be guided.

  The contact portion connected to the opening end portion 123a includes a pair of connecting portions 123b and a pair of contact pieces 123c. The connecting portion 123b is an element that connects the opening end portion 123a and the base portion 123d, and the contact piece 123c is bent in the inner peripheral direction of the cylindrical body to be a central conductor (not shown) of the male side plug. Press contact.

  Since the center conductor is held in the plug pin 123, the center conductor is positioned substantially at the center position of the coaxial connector. Moreover, since the contact piece 123c is pressed against the center conductor from both radial sides of the cylindrical body, it is possible to uniformly apply an acting force to the center conductor and hold the center conductor at the center position of the coaxial connector. Therefore, if the contact piece 123c is configured in three pieces and is arranged in the circumferential direction of the plug pin 123 evenly, the center conductor can be more accurately held at the center position.

  The connecting pin 123 is accommodated in the insulating holder 122, and the insulating holder 122 is locked in the shell 121. In this locking structure, the flange-like portion 122a provided at one end of the insulating holder 122 engages with the inside of the tip of the shell 121, and the flange-like portion 122b formed in another projecting structure provided near the other end. Engages with an annular groove provided in the inner peripheral wall of the shell 121.

  FIG. 5 shows a spring-like plate material for manufacturing a plug used in the coaxial connector shown in FIG. From the upper side of the figure, it is connected to an opening end 123a, a pair of connecting portions 123b, a pair of contact pieces 123c, a base 123d, and a terminal portion 123e, and a protruding portion 123f is provided between the base 123d and the terminal portion 123e. . The protruding portion 123 f is engaged with the insulating holder 122 to hold the plug pin 123 in the insulating holder 122.

  6 (a), 6 (b), and 6 (c) show another embodiment of the present invention, which is characterized by the structure of the contact piece 123c. The contact piece 123c has a narrow width at both ends and a wide central portion, and the central portion is a receiving hole having a structure in which the cross-sectional shape is an arc as shown in FIG. 6 (c). ing. By this arc-shaped portion, the center conductor of the male side plug is pushed into the center position of the coaxial connector.

  7 (a) and 7 (b), the arc-shaped portion of the abutting piece shown in FIG. 6 is planar, and an axial groove is provided at the center. The axial groove serves as a receiving hole, and the center conductor of the male-side plug is fitted into the receiving hole so that the center conductor is held at the center position of the coaxial connector.

  FIGS. 8A, 8B, and 8C show three configuration examples of the terminal portion 123e. FIG. 8A shows a perspective view of the embodiment of FIG. 5, and the terminal portion 123e has a cylindrical end portion formed in an inverted shape. 8 (b) and 8 (c) show only the terminal portion 123e, FIG. 8 (b) shows a shape in which a cylinder is slit, and FIG. 8 (c) shows a shape in which the end portion is narrowed down. .

  9 to 12 show another embodiment in which the contact piece 123c is deformed. 9A and 9B are a perspective view and a plan view of a configuration example in which both ends are narrow and the central portion is wide. FIGS. 10A and 10B are a perspective view and a plan view of a configuration example in which a groove in the longitudinal direction is provided in the central portion of the contact piece 123c in the embodiment of FIG. 11 (a) and 11 (b) are configuration examples in which both ends are wide and the central portion is narrow, and are bent in a W shape when viewed from the side so as to form two contact portions in the longitudinal direction. It is the perspective view and top view which show. 12 (a) and 12 (b) are a perspective view and a plan view showing a configuration example in which the configuration example of FIG. 11 is combined with a groove in the longitudinal direction similar to FIG.

  9 and 11, the gap formed between the pair of contact pieces 123c and 123c functions as a receiving hole. In the embodiments of FIGS. 10 and 12, a longitudinal groove is further added. The gap having the structure functions as a receiving hole to receive the central conductor of the male side plug.

Explanatory drawing which shows the external appearance of the signal divider | distributor which is an example of application of this invention. FIGS. 2A and 2B are explanatory views showing the overall shape of a coaxial connector and elements incorporated in the connector. 3 is a cross-sectional view showing the internal structure of the female coaxial connector 120 shown in FIG. FIG. 4 is a partial cross-sectional view showing the structure of the plug pin 123 in the female coaxial connector in which the detailed structure of the shell and the insulating holder is different from those in FIGS. 2 and 3. FIG. 5 is an explanatory view showing a spring-like plate material for manufacturing a plug used in the coaxial connector shown in FIG. 6 (a), (b) and (c) are a perspective view, a longitudinal sectional view and a transverse sectional view showing another embodiment of the present invention. FIGS. 7A and 7B are a perspective view and a cross-sectional view of an embodiment in which the arc-shaped portion of the contact piece shown in FIG. 6 is planar and an axial groove is provided in the center. 8A, 8B, and 8C are perspective views showing three configuration examples of the terminal portion 123e. 9A and 9B are a perspective view and a plan view of a configuration example in which both ends are narrow and the central portion is wide. 10A and 10B are a perspective view and a plan view of a configuration example in which a longitudinal groove is provided in the central portion of the contact piece 123c in the embodiment of FIG. 11 (a) and 11 (b) are configuration examples in which both ends are wide and the central portion is narrow, and are bent in a W shape when viewed from the side so as to form two contact portions in the longitudinal direction. The perspective view and top view which show. FIGS. 12A and 12B are a perspective view and a plan view showing a configuration example in which the same configuration as that shown in FIG.

Explanation of symbols

110 Case 120 Terminal 121 Shell 122 Insulating holder 123 Plug pin 123a Open end 123b Connecting portion 123c Contact piece 123d Base 123e Terminal portion 123f Projecting portion

Claims (8)

  A spring-like plate material having conductivity is rolled into a cylindrical body, and incisions are made in at least two locations along the circumferential direction of the cylindrical body, and a part of the wall material of the cylindrical body is the cylindrical shape. A coaxial connector in which at least two contact pieces are formed by bending in the inner circumferential direction of the body, and a receiving hole for receiving the center conductor of the male coaxial plug is formed in the center of the cylindrical body by the contact pieces. Female side connector pin. In the female connector pin of the coaxial connector according to claim 1,
A female-side plug pin of a coaxial connector having a structure in which a gap is formed between the contact pieces and the center conductor is sandwiched in the gap. In the female connector pin of the coaxial connector according to claim 1,
The contact piece is a female-side plug pin of a coaxial connector formed such that the central portion in the longitudinal direction has a maximum width and becomes narrow toward both ends. In the female connector pin of the coaxial connector according to claim 1,
The female contact plug pin of the coaxial connector is formed so that the contact piece has a maximum width at both ends of the cut and a minimum width at the center of the cut. In the female connector pin of the coaxial connector according to claim 1,
The contact piece is a female-side plug pin of a coaxial connector having a groove extending in the longitudinal direction for guiding the center conductor. In the female connector pin of the coaxial connector according to claim 1,
The contact piece is a female-side plug pin of a coaxial connector having a ridge extending in a direction perpendicular to the longitudinal direction for contacting the central conductor at a plurality of locations. In the female connector pin of the coaxial connector according to claim 1,
The receiving hole is a female-side plug pin of a coaxial connector having a circular cross-sectional shape. In the female connector pin of the coaxial connector according to claim 1,
The receiving hole is a female-side plug pin of a coaxial connector in which a cross-sectional shape is provided with a circular arc at the center for holding the central conductor.

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