JP3429724B2 - Switching device for surge test of power supply circuit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching device for disconnecting a surge absorber from a circuit when performing a surge test on a power supply circuit.

[0002]

2. Description of the Related Art In a device such as a switching power supply, a surge absorber is usually provided to protect external noise such as lightning surge. That is, two surge absorbers are connected in series between two input terminals of the power supply circuit, and the point where the two surge absorbers are connected to each other and the ground terminal are connected.

However, in the above circuit configuration, when performing a surge test, the surge absorber operates when a surge voltage is applied between one input terminal and the ground terminal of the power supply circuit, so a withstand voltage test may be performed. Can not. Therefore, the switching device disconnects the ground terminal and the surge absorber so that the surge absorber does not operate and a withstand voltage test is performed.

FIG. 5 is a perspective view showing a conventional surge test switching device C30 in a power supply circuit.

A conventional surge test switching device C30 is
The pedestal BS is provided with two screws B31 and B32, and a land on the surge absorber side and a land on the ground side are respectively connected to the parts screwed with these screws B31 and B32, and the two screws B31 and B32 are loosened, By fitting the short piece SP and tightening the screws B31 and B32, the surge absorber side land and the ground side land are connected.
The power supply circuit is normally used in this state. On the other hand, when performing a surge test, the above two screws B3
If 1, B32 is loosened and the short piece SP is removed, the surge absorber side land and the ground side land are disconnected, and a surge test is performed.

As a conventional surge test switching device for a power supply circuit, a device using a short-circuit connector or a faston tab is also known.

[0007]

However, the above conventional example has the following problems.

Switching device C30 for surge test of power supply circuit
As a preparatory operation for performing a surge test in the power supply device using, the terminals must be disconnected by loosening the screws B31 and B32 and removing the short piece SP. That is, work of three steps is required. Then, perform a surge test. After surge test,
To return the power supply to normal use, use screws B31, B
The terminals must be connected by sandwiching the short piece SP and tightening the screws B31 and B32 in a state where 32 is loosened. That is, in order to return the power supply device to the normal use condition, the work of three steps is still necessary. Therefore, the work of switching the line using the switching device C30 is complicated and troublesome.

Further, when the short piece SP is removed and a surge test is performed, the short piece SP may be lost, and it is difficult to substitute the short piece SP with another one. Furthermore, there is a problem that the space occupied by the surge test switching device C30 for the power supply circuit on the circuit board is large and the power supply circuit cannot be downsized.

On the other hand, if a short-circuit connector is used instead of the surge test switching device C30 of the power supply circuit, the work of connecting and disconnecting the terminals is simple. However, the connector may be lost during the surge test by removing the connector, and it is difficult to substitute the short-circuit connector with another one. Further, there is a problem that the occupied space on the substrate circuit is large and the power supply circuit cannot be downsized.

Switching device C30 for surge test of power supply circuit
If you use the Faston tab instead of, you can easily connect and disconnect terminals. However, when the connector is removed and the surge test is being performed, the cord is used, so the terminal is idle with the faston tab removed, and this terminal comes in contact with other parts of the circuit, destroying the device. And so on. It is possible to cover the idle terminal, but it is troublesome to prepare and attach the cover.

Furthermore, if a short-circuit connector or a faston tab is used, there is a risk of contact failure due to vibration of the device, aging, insufficient fitting, and the like.

According to the present invention, in preparation for a surge test, the work of connecting and disconnecting the ground terminal and the surge absorber can be easily performed, and the terminals can be connected safely with a connecting component that is easy to substitute without using a special tool. It is an object of the present invention to provide a switching device for surge test of a power supply circuit, which is connected to the power supply and is inexpensive and small.

[0014]

The present invention comprises a screw hole.
Grounded conductor and a through hole
It has a metal base and is connected to the ground terminal of the power circuit.
Connected in series between the ground land and the power circuit terminal
The above two surge absorbers in the two surge absorbers
An internal earth run connected to the connection point between the sobers
And a circuit board having a through hole,
Insert the through hole of the metal fittings and the through hole of the circuit board,
Has a screw that engages with the screw hole provided in the grounding conductor.
The ground side conductor is electrically connected from one side of the circuit board.
Connected to the ground land described above,
The tool is electrically connected to the inside of the circuit board from the other side of the circuit board.
It is connected to the earth land and performs a surge test of the power circuit.
If you do not touch the grounding metal fitting,
Screw the above screw into the screw hole of the conductor on the ground side, and
When performing a surge test, connect the ground side conductor to the above
For surge test of power circuit characterized by removing screws
It is a switching device.

Further , according to the present invention, a contact provided with a through hole is provided.
It has a ground conductor and a grounding metal fitting with a hole that has a screw hole.
The ground land connected to the ground terminal of the power supply circuit.
And two surges connected in series between the power supply circuit terminals
Between the above two surge absorbers in the absorber
An internal earth land connected to the connection point and a through hole
A circuit board including: a through hole of the ground side conductor;
Insert the through hole of the circuit board into the grounding metal fitting with the hole.
Has a screw that engages with the provided screw hole and
The side conductor is electrically connected to the contact from one side of the circuit board.
Connected to the ground land, the above grounding metal fitting
Electrically from the other side of the road board
Connected to the power circuit when not performing surge test
Is the grounding metal fitting with the hole through the through hole of the grounding side conductor.
Screw the above screw into the screw hole of the
When removing the screw, remove the screw from the
Switching device for surge test of power supply circuit characterized by
Is.

[0016]

[0017]

[0018]

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows a surge test switching device C10 for a power supply circuit according to an embodiment of the present invention.
FIG. 3 is a diagram showing a power supply circuit 100 in which a surge test switching device C10 for a power supply circuit is used.

In the power supply circuit 100, surge absorbers AB1 and A1 are provided between the two input terminals T1 and T2 of the power supply circuit.
The series circuit of B2 is connected. The point where the two surge absorbers AB1 and AB2 are connected to each other and the ground terminal FG are connected via the surge test switching device C10 of the power supply circuit 100.

FIG. 2 is an exploded perspective view showing the configuration of the surge test switching device C10 used in the power supply circuit 100.

First, the circuit board CB1 has through holes CH,
A ground land FGL connected to the ground terminal FG;
Two surge absorbers AB1 and AB2 are connected in series between two input terminals T1 and T2 of the power supply circuit, and the two surge absorbers AB1 and AB2 are connected to each other through a copper foil CF. Earth land (power circuit land) SAL.

The surge test switching device C10 of the power supply circuit 100 comprises a grounding metal fitting (conductor on the power supply circuit side) 11 with a hole,
It has a ground-side conductor 12, a connection screw B1, and a circuit board CB1. The grounding metal fitting 11 with holes has a first claw 11a for engaging with the internal ground land SAL, and a through hole 11a.
b and are provided. The grounding side conductor 12 is provided with a second claw 12a for engaging with the grounding land FGL and a screw hole 12b.

Then, the grounding metal fitting 11 with holes is mounted on one surface of the circuit board CB1, and the first claw 11a provided on the grounding metal fitting 11 with hole is used as the internal ground land SAL.
, Preferably by soldering,
The grounding metal fitting 11 with holes and the internal ground land SAL are electrically connected. Further, the ground-side conductor 12 is mounted on the other surface of the circuit board CB1, and the second claw 12a provided on the ground-side conductor 12 is inserted into the ground land FGL and preferably soldered. Thus, the ground side conductor 12 and the ground land FGL are electrically connected.

From the direction in which the grounding metal fitting 11 with holes is mounted, the connecting screw B1 is inserted through the through hole 11b of the grounding metal fitting 11 with hole and the through hole CH of the circuit board CB1, and the screw hole of the ground side conductor 12 is inserted. It is screwed to 12b. By this screwing, the head of the connection screw B1 and the grounding metal fitting 11 with holes are brought into close contact with each other. The connection screw B1, the grounding metal fitting 11 with holes, and the grounding side conductor 12 are conductors. Also, the grounding metal fitting 11 with holes,
The ground-side conductor 12 is made of a material that can be soldered if necessary.

Next, the operation of connecting and disconnecting the conductor by the surge test switching device C10 of the power supply circuit will be described.

FIG. 3 is a sectional view showing the configuration of the surge test switching device C10 for the power supply circuit, in which the internal earth land SAL and the ground land FGL are connected by the surge testing switching device C10 for the power circuit. It is a figure showing the state where it is.

Before performing the surge test, the grounding metal fitting 11 with holes and the grounding side conductor 12 are connected as shown in FIG. In other words, the connection screw B1 is inserted into the through hole 11b of the hole-equipped grounding metal fitting 11 and the through hole CH of the circuit board CB1 and is screwed into the screw hole 12b of the grounding side conductor 12, whereby the internal earth land. SAL and ground land FG
L is electrically connected. That is, by installing the connection screw B1, the surge absorber AB
1 and AB2 work, and the power supply circuit 100 is in a state where it is normally used.

FIG. 4 is a diagram showing a state in which the connection screw B1 in the surge test switching device C10 for the power supply circuit is removed from the grounding metal fitting 11 with holes and the grounding side conductor 12.

Through hole 11b of grounding metal fitting 11 with holes, through hole CH of circuit board CB1, and through hole 12b of ground side conductor 12
By pulling out the connection screw B1 inserted in and, the internal ground land SAL and the ground land FGL are electrically insulated. That is, by removing the connection screw B1, the surge absorbers AB1 and AB2 do not work, and the surge test of the power supply circuit 100 can be performed.

Therefore, it is necessary to pull out the connecting screw B1.
In the process, the line can be separated and the surge test preparation work becomes easy. Further, the lines can be connected in one step of mounting the connection screw B1, and the work after the surge test is completed becomes easy. Further, these operations can be easily performed by one driver without using a special tool. Furthermore, it is economical because it does not use terminal blocks, short-circuit connectors, faston tabs, or the like.

It is desirable that the two claws 12a of the ground side conductor 12 are provided at symmetrical positions with respect to the through hole CH of the circuit board CB1. This is because an equal force acts on the two claws 12a when tightening the connection screw B1 with a screwdriver. On the other hand, the claw 11a of the screw receiving conductor can be provided at any position.

When the connecting screw B1 is removed as in the above embodiment, the claw 11a of the grounding metal fitting 11 with a hole is used as the internal earth land SAL, and the claw 12a of the grounding side conductor 12 is used.
Is preferably soldered to each ground land FGL. However, loosen the connection screw B1,
By removing the claw 11a of the internal earth land SAL from the internal earth land SAL and the ground land FG
The disconnection with L can be easily performed. In this case, it is not necessary to at least solder the claw 11a of the grounding metal fitting 11 with holes.

In the above embodiment, the grounding metal fitting 11 with holes is used.
Through hole 11b, and ground side conductor 12 is provided with screw hole 12b. You may reverse this. That is, the grounding metal fitting with a hole may be a grounding metal fitting with a screw hole, and a through hole may be provided in the ground side conductor instead of the screw hole. That is, the ground side conductor provided with a through hole, the hole-equipped ground metal fitting (power circuit side conductor) having a screw hole, the ground side conductor and the ground land are soldered as necessary, and , The power supply circuit side conductor and the power supply circuit land are soldered as required, a circuit board provided with a through hole, the ground side conductor through hole, the circuit board through hole, A switching device for a surge test of a power supply circuit may be provided which has a connection screw that is screwed into a screw hole provided in the power supply circuit side conductor. By thus changing the locations where the through holes and the screw holes are provided, it is possible to provide a surge test switching device for a power supply circuit that is adapted to the circuit form.

Further, in the above embodiment, the claws to be inserted into the circuit board CB1 and soldered are provided on the grounding metal fitting 11 with holes and the grounding side conductor 12. As a result, when the grounding metal fitting 11 with holes and the grounding-side conductor 12 are soldered to the circuit board CB1, they are temporarily fixed at the time of insertion and do not fall off, which facilitates the soldering work.

As a measure for preventing the connection screw B1 from loosening, a spring washer or the like may be provided between the head of the connection screw B1 and the grounding metal fitting 11. Further, by coloring the head of the connection screw (the connection screw may be colored with a conductive material), the connection screw B1 is conspicuous, and it is possible to easily visually confirm that the wiring is connected.

The surge test switching device C10 for the power supply circuit includes a first fixed conductor fixed to the ground side conductor, a second fixed conductor fixed to the power supply circuit side conductor, and the second fixed conductor. It is an example of a switching device for a surge test of a power supply circuit, which has one fixed conductor and screwing means for screwing the second fixed conductor.

In the above embodiment, the single-phase power supply circuit has been described, but a similar switching device can be used in a three-phase power supply circuit. Further, these power supply circuits may be either a commercial power supply circuit or a DC output power supply circuit.

[0039]

According to the present invention, in preparation for a surge test, the work of connecting and disconnecting the ground terminal and the surge absorber is easy, and the terminals are connected with a connection component that is easy to substitute without using a special tool. It is possible to provide a surge test switching device for a power supply circuit that reliably connects terminals and is inexpensive and compact.

[Brief description of drawings]

FIG. 1 is a surge test switching device C10 for a power supply circuit,
It is a figure which shows the power supply circuit 100 in which the switching device C10 for surge tests of a power supply circuit is used.

FIG. 2 is a switching device C1 for surge test of the power supply circuit 100.
It is an exploded perspective view showing the composition of 0.

FIG. 3 is a cross-sectional view showing the configuration of a surge test switching device C10 for a power supply circuit, showing an internal earth land SAL and a surge test switching device C10 for a power circuit.
FIG. 6 is a diagram showing a state in which a ground land FGL is connected.

FIG. 4 is a view showing a state in which a connection screw B1 in a surge test switching device C10 of a power supply circuit is removed from a grounding metal fitting 11 and a grounding side conductor 12;

FIG. 5: Switching device C3 for conventional surge test of power supply circuit
It is a perspective view which shows 0.

[Explanation of symbols]

100 ... power supply circuit, 11 ... Earth fittings with holes, 12 ... ground side conductor, AB1, AB2 ... Surge absorber, B1, B2 ... Connection screw, C10 ... Switching device for power circuit surge test, CB1, CB2 ... Circuit board, FG ... ground terminal, FGL ... Land for grounding, SAL ... Earth land for internal use, T1, T2 ... Power supply circuit terminals.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Airo Takagi 1-18-1 Takada, Toshima-ku, Tokyo Within Orijin Electric Co., Ltd. (72) Inventor Keiichi Hirose 2-3-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Toru Suzuki 3-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Inventor Kohei Komatsu 10-13 Minamimachi, Hanno City, Saitama Prefecture Shindengen Kogyo Co., Ltd. (56) References JP-A-8-56086 (JP, A) Actual development Sho 53-137464 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 12 / 04

Claims (5)

(57) [Claims] 1. A grounding-side conductor having a screw hole; a grounding metal fitting having a through hole ; a grounding land connected to a grounding terminal of a power supply circuit ;
Two surge absorbers connected in series between power circuit terminals
Connection between the above two surge absorbers in the sober
The internal earth land connected to the point and the through hole
A circuit board for Bei; a through hole of said holes with grounding bracket, inserted through the through hole of the circuit board, and a screw is screwed with the screw hole provided in the ground-side conductor; have, the Ground side conductor from one side of the circuit board
Electrically connected to the ground land,
The metal fitting is electrically connected to the inner side of the circuit board from the other side.
Connected to the earth ground for the part, surge test of the power supply circuit
If you do not perform the
Screw the above screw into the screw hole of the grounding side conductor,
When performing a surge test on the road
A switching device for surge test of a power supply circuit, characterized by removing the screw . 2. The grounding metal fitting with holes according to claim 1, engaged with the grounding land for internal use.
And a grounding side conductor for engaging the grounding land.
A switching device for surge test of a power supply circuit, which is a metal fitting having a second claw . 3. A ground-side conductor having a through hole ; a grounding metal fitting having a screw hole; a grounding land connected to a grounding terminal of a power circuit ;
Two surge absorbers connected in series between power circuit terminals
Connection between the above two surge absorbers in the sober
The internal earth land connected to the point and the through hole
A circuit board for Bei; a through hole of the ground-side conductor, inserted through the through hole of the circuit board, and a screw is screwed with the screw hole provided in the ground fitting with said hole; have, the Ground side conductor from one side of the circuit board
Electrically connected to the ground land,
The metal fitting is electrically connected to the inner side of the circuit board from the other side.
Connected to the earth ground for the part, surge test of the power supply circuit
If you do not
Screw the above screw into the screw hole of the grounding metal fitting with
When performing a road surge test, use the above-mentioned grounding metal fitting with a hole.
A switching device for a surge test of a power supply circuit, characterized in that the screw is removed from the switch. 4. The grounding metal fitting with holes according to claim 3, engaged with the grounding land for internal use.
And a grounding side conductor for engaging the grounding land.
A switching device for surge test of a power supply circuit, which is a metal fitting having a second claw . 5. The surge test switching device for a power supply circuit according to claim 1, wherein the screw is colored.