JP3097068B2 - F-type connector with discharge function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an F-type connector having a discharge function.

[0002]

2. Description of the Related Art In an electronic device such as a television receiver or a video device, a coaxial cable is connected to a signal terminal thereof.
Generally, an F-type connector is used. For example, in a television receiver, an F-type connector is used when a signal line from an antenna is input to an antenna terminal.

[0003]

However, in such video and television electronic equipment, for example, when a receiving antenna receives a high voltage pulse having a narrow pulse width due to lightning or static electricity on the signal line of the F-type connector, There is a serious problem that this instantaneous high voltage pulse is applied to the subsequent circuits. That is, a high-voltage pulse having a narrow pulse width contains many high-frequency components, which transmit through a coaxial cable line and reach a circuit board on which electronic circuit components in an electronic device are mounted. Therefore, in order to prevent the subsequent circuit from being damaged or malfunction from being caused by the inflow of the high-voltage pulse having the narrow pulse width, high-voltage pulse countermeasures have conventionally been taken in a circuit subsequent to the F-type connector.

For example, a lightning arrester (arrestor) or the like for absorbing a surge of a power failure in a circuit subsequent to the F-type connector has been provided. For this reason, the circuit cannot be simplified, and the circuit cost increases due to an increase in components such as a lightning arrester circuit.

The present invention has been made to solve such problems and disadvantages. An object of the present invention is to provide an F-type connector itself with a function of discharging a high-voltage pulse having a narrow pulse width from a signal line to ground. An object of the present invention is to provide an F-type connector with a discharge function, which makes it unnecessary to take measures against a high voltage pulse in a circuit subsequent to the type connector.

[0006]

According to the present invention, there is provided an F-type connector with a discharge function having an air discharge gap between a signal line and a ground in the F-type connector. An F-type connector for discharging an external high voltage pulse applied to a wire portion to a ground portion through the air discharge gap portion, wherein the air discharge gap portion is provided between the signal line portion and the ground portion. It is characterized by being formed with a notch formed in the hollow cylindrical insulating portion.

[0007]

The F-type connector with a discharge function according to the present invention can be used in a video or television electronic device when a high-voltage pulse having a short instantaneous pulse width due to lightning or static electricity is applied to the signal line of the F-type connector. In the air discharge gap provided between the signal line and the ground in the mold connector, this instantaneous high voltage pulse is applied from the signal line to the ground in the air discharge gap where air is ionized by a high electric field. The discharge current flows in the gap. As a result, application of a high voltage pulse to subsequent circuits is prevented.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explanation will be given based on FIG. First, the configuration of the present invention will be described. FIG. 1 is a perspective view showing a first embodiment of an F-type connector with a discharge function according to the present invention. FIG. 2 is a partially cutaway sectional view thereof.

In both figures, an F-type connector 1 comprises a long signal line portion 2, a ground portion 3 made of a hollow cylindrical conductive member, and a cover 4 made of an insulating material. The signal line portion 2 made of a conductive member has a pin-shaped male terminal 2C at its front end.
And a wire joint 2 at the rear end for joining the wires by crimping
A and a discharge protruding portion 2B provided at an intermediate portion between them.

The ground portion 3 has a hollow cylindrical portion 3A having a bottom at one end, a screw groove 3B is formed on the inner wall of the cylindrical portion 3A, and a hollow cylindrical insulating portion is provided at the center of the bottom portion. An insulating part 3C made of a body is fitted. Further, a signal ground terminal 3D made of a conductive member is provided at the bottom portion.
Are connected. The signal line portion 2 is fixedly fitted with the male terminal 2C inserted into the hollow portion of the insulating portion 3C and the tip end of the male terminal 2C protruding from the hollow portion.

On the other hand, the signal line 5A of the coaxial cable 5 connected to the antenna or the like is crimped and connected to the electric wire joint 2A of the signal line portion 2 as described above, and the shield net 5B is bundled at one place. And the signal ground terminal 3D by soldering or the like. The male terminal 2C and the screw groove 3B are inserted and screwed into a mating connector (not shown). By this screwing, the ground portion 3 is electrically connected to the ground portion of the mating connector, and so-called frame grounding is performed.

The discharge projection 2B of the signal line 2 has a sharp tip, and forms a narrow air discharge gap 3E with the cylindrical portion 3A of the ground 3 as shown in FIG. Are arranged at a predetermined distance apart from each other. An electric field of a high-voltage pulse is applied to the gap to ionize air, and as a result, a discharge current flows to discharge.

When the F-type connector 1 is connected to the mating connector, a high-voltage pulse having a narrow pulse width, which is input from an antenna or the like due to aerial discharge such as lightning, transmits the signal line 5A and applies a high voltage to the signal line portion 2. When a pulse is applied, the high voltage pulse is discharged from the discharge projection 2B to the cylindrical portion 3A of the ground portion 3 via the air discharge gap 3E, and is absorbed by the frame ground. This effectively removes the instantaneous high voltage pulse, thereby preventing the transmission of the high voltage pulse downstream of the F-type connector. The air discharge gap 3E may have a size similar to the gap of the lightning arrester circuit. Further, it is desirable that the tip of the discharge projection 2B has an acute angle. This is because the electric field becomes stronger in the same dimensional gap, so that a high-voltage pulse easily starts discharging.

FIGS. 3 and 4 are a perspective view showing a second embodiment of the F-type connector with a discharge function according to the present invention and a partially cutaway sectional view thereof. Note that the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In both figures, the F-type connector 10 includes a long signal line portion 12, a ground portion 13 made of a hollow cylindrical conductive member, and a cover 4 made of an insulating material. The signal line portion 12 made of a conductive member has a front end,
It is composed of a pin-shaped male terminal 12C and a wire joint 12A at the rear end for joining the wires by swaging.

The ground portion 13 has a hollow cylindrical portion 13A having a bottom at one end, a threaded portion 13B is formed on the inner wall of the cylindrical portion 13A, and a hollow cylindrical insulating portion is provided at the center of the bottom portion. An insulating part 13C made of a body is fitted. A signal ground terminal 13D made of a conductive member is continuously provided on the bottom portion.
The discharge projection 13F rises from the middle of D and is formed. The signal line portion 12 is fitted and fixed with the male terminal 12C inserted into the hollow portion of the insulating portion 13C, and the distal end of the male terminal 12C protruding from the hollow portion.

The male terminal 12C and the screw groove 13B are inserted and screwed into a mating connector (not shown). By this screwing, the ground portion 13 is electrically connected to the ground portion of the mating connector, and so-called frame grounding is performed.

The discharge projection 13F of the ground portion 13 has a sharp tip, and is spaced apart from the signal line 12 so as to form a narrow air discharge gap 13E as shown in FIG. Has been established.

When a high voltage pulse having a short instantaneous pulse width is applied to the signal line section 12 in a state where the F-type connector 10 is connected to the mating connector, the high voltage pulse is transmitted from the signal line section 12 to the air discharge gap. The discharge protrusion 13F through the portion 13E
Which is absorbed by the frame ground. As described above, the instantaneous high voltage pulse is effectively removed, so that transmission of the high voltage pulse to the subsequent stage of the F-type connector is prevented.

Next, FIGS. 5 and 6 show a perspective perspective view and a WW sectional view of a third embodiment of the F-type connector with a discharge function according to the present invention, respectively. Note that the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In both figures, the F-type connector 20 comprises a long signal line portion 12, a ground portion 3 made of a hollow cylindrical conductive member, and a cover 4 made of an insulating material.

An insulating portion 21 made of a hollow cylindrical insulator is fitted in the center of the bottom of the ground portion 3, and a male terminal 12C is fitted and fixed in the hollow portion. A portion of the insulating portion 21 that is in contact with the cylindrical portion 3A is an air discharge gap portion 21A formed by the notch. That is, the signal line portion 12
The exposed peripheral portion 12b and the exposed edge 3Aa of the cylindrical portion 3A face each other with the air discharge gap 21A interposed therebetween.

When a high-voltage pulse having a short instantaneous pulse width is applied to the signal line section 12 in a state where the F-type connector 20 is connected to the mating connector, the high-voltage pulse is applied to the exposed peripheral portion of the signal line section 12. From 12b, the air is discharged to the exposed edge 3Aa of the cylindrical portion 3A through the air discharge gap 21A, and is eventually absorbed by the frame ground. As described above, the instantaneous high-voltage pulse is effectively removed as in the above-described embodiment.

[0022]

As described above, the F-type connector with a discharge function according to the present invention is a high-voltage connector having a narrow instantaneous pulse width due to lightning strikes or static electricity on the signal line of the F-type connector in a video or television electronic device. When the pulse is applied, the air discharge gap provided between the signal line portion and the ground portion in the F-type connector discharges this instantaneous high voltage pulse on the signal line portion to the ground portion. As a result, transmission of the high voltage pulse to the subsequent circuits can be prevented.

As a result, subsequent circuit damage and malfunction due to instantaneous transmission of a high-voltage pulse can be prevented, and further, countermeasures against a high-voltage pulse having a narrow pulse width in a circuit subsequent to the F-type connector are eliminated. Thus, the circuit can be simplified. Furthermore, the effect that the circuit cost can be reduced by omitting components such as a lightning arrester circuit can be exhibited.

[Brief description of the drawings]

FIG. 1 is a first view of an F-type connector with a discharge function according to the present invention.
It is a see-through | perspective perspective view of an Example.

FIG. 2 is a partially cutaway sectional view of FIG.

FIG. 3 is a second view of the F-type connector with a discharge function according to the present invention.
It is a see-through | perspective perspective view of an Example.

FIG. 4 is a partially cutaway sectional view of FIG. 3;

FIG. 5 is a third view of the F-type connector with a discharge function according to the present invention.
It is a see-through | perspective perspective view of an Example.

FIG. 6 is a sectional view taken along line WW of FIG. 5;

[Explanation of symbols]

 1,10,20 F-type connector with discharge function 2 Signal line part 2A Electric wire joint part 2B Discharge protrusion part 2C Male terminal 3 Ground part 3A Cylindrical part 3B Screw groove part 3C Insulation part 3D Signal ground terminal 3E, 13E, 21A Air discharge gap Part 4 Cover 5 Coaxial cable 5A Signal line 5B Shield net 5C Insulation part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 24/00-24/18 H01R 9/05 H01R 4/64-4/66 H01R 13/648-13 / 658

Claims (1)

(57) [Claims] An air discharge gap portion is provided between a signal line portion and a ground portion in an F-type connector, and an external high voltage pulse applied to the signal line portion is discharged to the ground portion via the air discharge gap portion. An F-type connector, wherein said air discharge gap is
Part is provided between the signal line part and the ground part.
An F-type connector with a discharge function, wherein the F-type connector has a notch formed in an insulating portion having a hollow cylindrical shape .