JP2000048918A - Coaxial connector for circuit switching - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit switching coaxial connector capable of simply performing switching a frequency band cut without having to disconnect an electronic apparatus such as a serial unit. SOLUTION: An external shell 11 of a coaxial connector 3 is formed into cylindrical shape, and an insulator 12 and an insulator 13 are slidably installed in its inside. Inside the external shell 11, lateral slots 15a, 15b are formed in the inside peripheral surface on its front end side, and longitudinal slots 16 to combine the lateral slots 15a, 15b together. The insulator 12 is formed into a cylindrical shape, provided with a through hole 17 centering at its head, opened on the side opposite to the insulator 13, abutting its one end on the second insulator 13, provided with protrusions 19 on its outside surface and locked to the lateral slot 15a or 15b. A center contact 21 formed inside the insulator 13 is mounted to a printed circuit board 22 with its base projecting into a case 2. A push button switch 23 is installed on the printed circuit board 22 and the switch is operated by depressing its button 24 by the second insulator 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit switching coaxial connector used in a bidirectional CATV system.

[0002]

2. Description of the Related Art In recent years, in a CATV system, a normal TV signal is transmitted as a downlink signal,
From the CATV subscriber using the MHz frequency band.
2. Description of the Related Art A bidirectional system for transmitting data and the like to a station as an uplink signal has been used. In the above CATV system, 1
In the frequency band of 0 to 30 MHz, disturbance noise is generally generated by home electric appliances and the like. If a subscriber who does not need a two-way system uses a device that passes the frequency band of 10 to 50 MHz, a large number of In a CATV station having a subscriber, the external noise from each subscriber is amplified, and as a result, the CAT
The upstream signal from the V subscriber cannot be determined, and the interactive service may not be established. Therefore, if the CATV subscriber does not need an interactive system, 10-5
It is necessary to cut off the frequency band of 0 MHz to minimize disturbance noise in CATV stations. So CATV
The serial unit, which is the terminal device of the subscriber, has 10 to 50 units.
A changeover switch for cutting the frequency band of MHz is attached, so that the CATV subscriber can cut the frequency band of 10 to 50 MHz when the two-way system is not required.

[0003]

However, in the above-mentioned conventional series unit with a changeover switch, a changeover switch is installed on the side or the back of the device due to a structural problem of the device, so that it cannot be easily operated. I have. For this reason, when the changeover switch is operated, it has conventionally been necessary for the operator of the CATV station to remove the series unit, switch the switch, and then attach the series unit again, which is a very laborious operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a circuit switching coaxial connector which can easily switch a frequency band cut without removing an electronic device such as a series unit. Aim.

[0005]

According to a first aspect of the present invention, there is provided a circuit-switching coaxial connector comprising: a cylindrical outer shell;
A cylindrical first insulator slidably provided in the outer shell and located on the front end side, a through hole provided in the center of the head of the first insulator, and the first insulator A plurality of protrusions provided along the outer periphery of the first shell; and first and second lateral grooves provided at predetermined intervals on the inner circumferential surface of the outer shell and locking the protrusions of the first insulator. A vertical groove that connects the first and second lateral grooves and forms a movement path for the projection of the first insulator; and a slidably provided inside the outer shell, which moves together with the first insulator. A cylindrical second insulator, a center contact located at the center of the first and second insulators, and a base mounted on a printed circuit board; and a second contact mounted on the printed circuit board. A push button switch that switches the circuit of the printed circuit board when pressed by an insulator Comprising a, characterized by switching the pushbutton switch above by positioning the protrusion of the first insulator to the first lateral grooves and second lateral grooves above.

The push button switch switches a filter circuit for cutting a frequency band of an upstream signal in a CATV system.

The push button switch is a CAT
It is characterized in that a termination circuit of an electronic device in a V system is switched.

[0008] Further, the push button switch is a CAT
The present invention is characterized in that a current passing circuit of an electronic device in a V system is switched.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a series unit 1 according to a first embodiment of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a bottom view. is there. 2A and 2B show the details of the coaxial connector in FIG. 1, wherein FIG. 2A is a front view and FIG. 2B is a side sectional view.

As shown in FIG. 1, a series unit 1 has a coaxial connector 3 as a TV terminal on a case 2 and an input / output terminal 4 connected to a CATV transmission line on the side of the case 2 and other components. An input / output terminal 5 connected to the device is provided. A printed circuit board on which, for example, a branch circuit or the like is formed is provided in the case 2 as described in detail later. The branch circuit branches a signal input to the input / output terminal 4 into two, outputs one to the input / output terminal 5, and outputs the other signal to the coaxial connector 3. Further, a push button switch for switching the frequency band cut is provided in case 2. The push button switch is switched by operating the coaxial connector 3 as described later in detail. The serial unit 1 is used, for example, mounted on an outlet box.

The coaxial connector 3 is configured as shown in FIG. In FIG. 2, reference numeral 11 denotes an outer shell of the coaxial connector 3, which is formed in a cylindrical shape, and whose base is provided integrally with the case 2. A first insulator 12 and a second insulator 13 are slidably provided inside the outer shell 11. A screw portion 14 is formed on the outer periphery of the outer shell 11, and a coaxial plug (not shown) for connecting a coaxial cable is mounted on the screw portion 14.

The inside of the outer shell 11 is shown in FIG.
As shown in (b), a first lateral groove 15a and a second lateral groove 15b are provided at a predetermined interval along the inner peripheral surface at a position near the front end side. Also, inside the outer shell 11,
As shown in FIG. 2A, for example, vertical grooves 16 are provided at two places on the left and right sides, respectively, for connecting the first horizontal groove 15a and the second horizontal groove 15b from the front end opening.

The first insulator 12 is formed in a cylindrical shape by a member having elasticity, and has a through hole 17 at the center of its head and a groove 18 at the front of the head. The groove 18 is used, for example, when the first insulator 12 is rotated by a driver or the like. In addition, the first
The insulator 12 has an opening on the side facing the second insulator 13, and the tip is in contact with the second insulator 13. Further, the first insulator 12 is provided with two projections 19 at an interval of 180 degrees outside the opening end, and the first insulator 12 provided on the outer shell 11 is provided.
In the horizontal groove 15a or the second horizontal groove 15b. In this case, the projection 19 is formed in a tapered shape toward the tip of the opening to enable the movement from the first lateral groove 15a to the second lateral groove 15b and the first lateral groove 15b.
a or the second lateral groove 15b. When the protrusion 19 is located in the first lateral groove 15a, the front end of the first insulator 12 and the front end of the outer shell 11 are set to be flush with each other. In addition, the first insulator 12 normally holds the projection 19 at a position rotated by 90 ° from the vertical groove 16 along the first horizontal groove 15a.

On the other hand, the second insulator 13 is formed in a cylindrical shape, and one end of the second insulator 13 projects from the outer shell 11 so as to cover the case 2.
Located within. Inside the second insulator 13,
A center contact 21 is arranged. In this case, the inner diameter of the second insulator 13 is formed in accordance with the center contact 21. The center contact 21 is provided in the second insulator 13 as described above, but its head is located on the first insulator 1.
The base is provided to protrude into the case 2 and is mounted on the printed circuit board 22.
A branch circuit is formed on the printed board 22, and the center contact 21 is connected to the circuit pattern.
The printed circuit board 22 is connected to the second
Is provided so as to face the insulator 13.

Further, a push button switch 2 is provided on the printed circuit board 22 at a position facing the second insulator 13.
3 and the button 24 is in contact with the second insulator 13. That is, when the projection 19 of the first insulator 12 is located in the first lateral groove 15 a as shown in FIG. 2, the second insulator 13 is lightly applied to the button 24 by the reaction force of the push button switch 23. They are kept in contact. The push button switch 23 is set to 10 to 5
This is a switch for switching a high-pass filter that cuts a frequency band of 0 MHz.

In the state shown in FIG. 2, when the first insulator 12 is pressed from the outside against the reaction force of the push button switch 23, as shown in FIG. The inside of the shell 11 slides, and the projection 19
From the horizontal groove 15a to the second horizontal groove 15b. At this time, the second insulator 13 slides inside the outer shell 11 together with the first insulator 12, and presses the button 24 of the push button switch 23.
3 is switched.

FIGS. 4 and 5 show the circuit configuration of the series unit 1. FIG. FIG. 4 shows a normal state, and FIG. 5 shows a state when the push button switch 24 is switched. The input / output terminal 4 inputs the TV signal sent from the CATV transmission line to the branch circuit 32 via the capacitor 31. The branching circuit 32 branches the input signal into two, outputs one signal to the input / output terminal 5 via the capacitor 33, and outputs the other signal to the coaxial connector 3 via the push button switch 23 and the capacitor 34. Output. The push-button switch 23 is a two-circuit switch. The filter circuit 35 is connected between the terminals of the first circuit, and the terminals of the second circuit are short-circuited. The filter circuit 35 is a high-pass filter that cuts a frequency band of 10 to 50 MHz.

In a normal state of the push button switch 23, that is, in a state where the projection 19 of the first insulator 12 is locked in the first lateral groove 15a as shown in FIG. 2, FIG. As shown, the push button switch 23 is switched to the first circuit side, and the filter circuit 35 and the capacitor 34 are inserted between the branch circuit 32 and the coaxial connector 3.

Further, as shown in FIG. 3, the first insulator 1
2, the protrusion 19 of the first insulator 12 is moved to the second lateral groove 15b, the push button switch 23 is switched to the second circuit side as shown in FIG. And the coaxial connector 3 are connected via the capacitor 34.

Next, the operation of the above embodiment will be described. In the initial state, the coaxial connector 3 is configured such that the projection 19 of the first insulator 12 is connected to the first lateral groove 15 of the outer shell 11 as shown in FIG.
a, the front end of the first insulator 12 and the front end of the outer shell 11 are flush with each other. At this time, in a state where the push button switch 23 is not pressed, a filter circuit 35 is inserted between the branch circuit 32 and the coaxial connector 3 as shown in FIG. 4 to cut a frequency band of 10 to 50 MHz. Has become. That is, the CATV subscriber can use a TV signal which is a downstream signal of the CATV system.

When the CATV subscriber joins the bidirectional system using the down signal and the up signal, the first insulator 12 is pressed from the outside in the state shown in FIG. Press At this time, as shown in FIG. 3, the projection 19 of the first insulator 12 is
a to the second lateral groove 15b and locked. Also,
When the first insulator 12 is pushed in, the second insulator 13 slides in the outer shell 11 accordingly, and presses the button 24 of the push button switch 23. The push button switch 23 is shown in FIG. To the second circuit side as described above. As a result, the filter circuit 35 is cut off, the branch circuit 32 and the coaxial connector 3 are connected via the capacitor 34, and a circuit state for passing a signal of 10 to 50 MHz is established. As a result, bidirectional communication can be performed using the coaxial connector 3.

When the push button switch 23 is returned to the original state, the first insulator 12 is rotated by 90 °,
When the projection 19 is moved in the second horizontal groove 15 b and is aligned with the vertical groove 16, the projection 19 separates from the second horizontal groove 15 b, and the first insulator 12 and the second insulator The body 13 slides to the original position. When the first insulator 12 is rotated again by 90 ° in this state, the projection 19 moves from the vertical groove 16 to the first horizontal groove 15a and is locked.

According to the first embodiment, the outer shell 1
1, a first insulator 12 having a positioning mechanism and a second insulator 13 that slides with the first insulator 12 are provided, and the second insulator 13 is pressed by pushing the first insulator 12. , The frequency band cut push button switch 23 is switched, so that the frequency band cut can be easily switched without removing the series unit.

(Second Embodiment) Next, a second embodiment of the present invention will be described. In the first embodiment, the CATV
In the system, the case where the present invention is applied to a circuit switching coaxial connector for switching a used frequency band is described.
For example, as shown in FIG. 6, it can be implemented as a termination circuit switching coaxial connector. FIG. 6A shows a circuit state when the first insulator 12 is in a normal position, and FIG. 6B shows a circuit state when the first insulator 12 is pushed.

The embodiment of FIG. 6 shows a case where a dummy resistor 41 of, for example, 75 Ω required for the coaxial connector 3 not connected to a cable is switched and connected by a push button switch 23. In this case, the push button switch 23 has a configuration in which the fixed contacts a and b are switched by the movable contact c. The fixed contact a is connected to a circuit of the device, and a dummy resistor 41 is provided between the fixed contact b and the ground. ing. This dummy resistor 41 is provided in an internal circuit of the device. The movable contact c is connected to the coaxial connector 3. That is, in a normal state, the coaxial connector 3 is connected to the device circuit as shown in FIG. 6A, and when the first insulator 12 is pushed in, as shown in FIG. Are grounded via a dummy resistor 41.

As described above, the dummy resistor 41 can be easily connected to the coaxial connector 3 in which the connection of the cable is not performed, and when the cable is connected again, the original circuit state can be easily restored. it can.

(Third Embodiment) Next, a third embodiment of the present invention will be described. In CATV systems, generally C
The signal transmitted by the ATV transmission line is amplified by the booster and supplied to the TV receiver.
If the signal level is sufficiently large, no booster is needed. Conventionally, when a booster is used, it is replaced with a series unit and a current passing type. In the third embodiment, the power supply circuit can be easily switched according to the use state of the booster without replacing the series unit.

FIG. 7 shows an example in which the present invention is applied to a circuit for controlling the passage of current to a coaxial connector for television broadcasting equipment such as a distributor or a series unit. FIG.
(A), when the first insulator 12 is in a normal position,
FIG. 2B shows a circuit state when the first insulator 12 is pushed.

As shown in FIG. 7, the input / output terminal 4
The TV signal sent from the V transmission path is input to the branch circuit 32 via the capacitor 31. This branch circuit 32
The input signal is split into two, and one of the signals is
3 and output to the input / output terminal 5, and the other signal to the coaxial connector 3 via the capacitor 34. And
A series circuit of the push button switch 23 and the current passing coil 42 is connected between the input / output terminal 4 and the input / output terminal 5. The current passing coil 42 blocks a high frequency signal,
It has a function of passing a direct current. As the push button switch 23, one having a configuration for simply turning on / off a circuit is used. The coaxial connector 3 is connected to a TV receiver, and the input / output terminal 5 is connected to another transmitting / receiving device. The input / output terminal 5 includes
Usually, a booster power supply voltage is supplied.

In the above configuration, the input / output terminal 4 and the CA
In the case where a booster (not shown) is provided between the TV and the TV transmission line, as shown in FIG. 7A, the coaxial connector 3 is set in the normal state, and the push button switch 23 is held in the ON state. When the booster is used as described above, a power supply for the booster is supplied to the input / output terminal 5 from, for example, a tuner or a power supply device for the booster. This booster power supply is
It is sent to the input / output terminal 4 via the current passing coil 42 and the push button switch 23, and supplied from this input / output terminal 4 to the booster as operating power. As a result, the booster operates, amplifies the TV signal sent via the CATV transmission line, and inputs the amplified signal to the input / output terminal 4. This input / output terminal 4
Is split into two by a branch circuit 32, one signal is sent to the input / output terminal 5, and the other signal is sent to the coaxial connector 3.

In the case where the input / output terminal 4 is directly connected to the CATV transmission line without using the booster, FIG.
The first insulator 12 of the coaxial connector 3 as shown in FIG.
To turn off the push button switch 23. As a result, the booster power supply circuit is shut off. And CA
The TV signal sent by the TV transmission line is input from the input / output terminal 4 to the branch circuit 32 and is branched into two. One signal is sent to the input / output terminal 5 and the other signal is sent to the coaxial connector 3. .

According to the above-mentioned embodiment, the push-button switch 23 is turned on / off simply by switching the position of the first insulator 12 of the coaxial connector 3 in accordance with the use state of the booster, thereby simplifying the power circuit for the booster. Can be switched to

The present invention is not limited to the series unit,
It can be used for a television receiver using a coaxial connector.

[0035]

As described in detail above, according to the present invention, a first insulator having a positioning mechanism and a second insulator sliding with the first insulator are provided in the outer shell,
A coaxial connector is configured such that the first insulator is pushed into the outer shell to switch the frequency band cut push button switch through the second insulator, and the frequency band cut filter is formed by the push button switch. Since the circuits are switched, the frequency band cut can be switched easily without removing the electronic equipment such as the series unit.

Further, according to the present invention, since the dummy resistor for the coaxial connector is switched and connected by the push button switch using the coaxial connector, the dummy resistor can be easily connected to the coaxial connector from which the cable has been removed. When the cable connection is made again, the circuit state can be easily returned to the original state.

Further, according to the present invention, since the direct current passing circuit is switched by the push button switch using the coaxial connector, the power supply circuit for the booster can be easily switched.

[Brief description of the drawings]

FIG. 1A is a front view showing an external configuration of a series unit according to a first embodiment of the present invention, FIG.
(C) is the same bottom view.

FIG. 2A is a front view showing a configuration of a coaxial connector according to the embodiment, and FIG. 2B is a sectional side view of the same.

FIGS. 3A and 3B are explanatory views of the operation of the coaxial connector according to the embodiment, wherein FIG. 3A is a front view and FIG.

FIG. 4 is a circuit configuration diagram showing a normal state in the embodiment.

FIG. 5 is a circuit configuration diagram showing a state when a push button switch is switched in the embodiment.

FIG. 6A is a circuit configuration diagram showing a normal state in a second embodiment of the present invention, and FIG. 6B is a circuit configuration diagram showing a state when a push button switch is switched.

FIG. 7A is a circuit configuration diagram showing a normal state in a third embodiment of the present invention, and FIG. 7B is a circuit configuration diagram showing a state when a push button switch is switched.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 series unit 2 case 3 coaxial connector 4, 5 input / output terminal 11 outer shell 12 first insulator 13 second insulator 14 screw portion 15 a first lateral groove 15 b second lateral groove 16 vertical groove 17 through hole 18 groove 19 Projection 21 Center Contact 22 Printed Circuit Board 23 Push Button Switch 24 Button

Claims (4)

[Claims] 1. An outer shell formed in a cylindrical shape, a first cylindrical insulator slidably provided in the outer shell and located on a front end side, and a head of the first insulator. A through hole provided at the center of the portion, a plurality of protrusions provided along the outer periphery of the first insulator, and a protrusion of the first insulator provided at a predetermined interval on an inner peripheral surface of the outer shell; A first and a second lateral groove for locking the first and second lateral grooves, and a vertical groove forming a movement path for the projection of the first insulator at least between the first and the second lateral groove; A cylindrical second member that is slidably provided and moves together with the first insulator.
And a center contact that is located at the center of the first and second insulators and has a base mounted on the printed circuit board, and mounted on the printed circuit board and pressed by the second insulator. A push button switch for switching a circuit of the printed circuit board, wherein the push button switch is switched by positioning the protrusion of the first insulator in the first lateral groove or the second lateral groove. Circuit switching coaxial connector. 2. The circuit switching coaxial connector according to claim 1, wherein the push button switch switches a filter circuit for cutting a frequency band of an upstream signal in a CATV system. 3. The circuit switching coaxial connector according to claim 1, wherein said push button switch switches a termination circuit of an electronic device in a CATV system. 4. The circuit-switching coaxial connector according to claim 1, wherein said push-button switch switches a current passage circuit of an electronic device in a CATV system.