JPH0339935Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a noise filter with a socket.

[Conventional technology]

FIG. 3 explains an example of a conventional noise filter with a socket. The metal container main body 1 is a box-like body with an open top and back side and a rectangular notch 2 on the front side wall. An L-shaped grounding conductor plate 3 is welded to the inner bottom of the box, and a center conductor plate 3 is welded to the back opening. A flange receiving plate 4 with bent pieces 5 integrally formed on the left and right edges of a rectangular window part is formed by welding the bent pieces 5 overlappingly on the inner surfaces of the left and right side walls of a box-like body. A horizontal plate-shaped external circuit connection terminal 7 and a ground terminal 8 are inserted into the notch 2 of the container body 1, and a rectangular insulating plate 6 with grooves 9 on both side edges and the bottom edge is fitted, and the ground terminal is inserted into the notch 2 of the container body 1. 8 is soldered to the container body 1, and the body of the flanged socket 10 is fitted into the back opening, and the ground terminal 11 penetrating through the back of the body is soldered to the free end of the grounding conductor plate 3. As shown in the figure, the free end of the grounding conductor plate 3 is bent downward into two stages to facilitate soldering. Circuit elements such as inductors and capacitors constituting the noise filter are housed in the container body 1, and the lead wires of the circuit elements are connected to the inner piece of the connection terminal 7 of the insulating plate 6 and the connection terminal 12 of the flanged socket 10, The grounding lead wire of the circuit element is pulled out through the slit in the plate-like lid 13 and then the lid 1 is closed.
3 to cover the top opening of the container body 1, and connect the lid 13 together with the grounding lead wire to the container body 1 by soldering.
A noise filter with a socket was made by joining the two.

[Problem that the invention attempts to solve]

In conventional noise filters with sockets,
The number of parts of the metal case is four, and a positioning means is required especially for the grounding conductor plate 3, which has the drawback of increasing the cost of parts and processing of the container. In addition, since the container body 1 is box-shaped with a large depth, the work of connecting the inner piece of the ground terminal 8 of the rectangular insulating plate 6 to the container and the work of connecting the ground terminal 11 of the flanged socket 10 to the grounding conductor plate 3 is easy. It is difficult to connect the lead wires of the circuit elements housed in the container body 1 and the connection terminals 7 and 12, which is a disadvantage.

[Means for solving problems]

The present invention eliminates such drawbacks of the conventional method by fitting a rectangular insulating plate 6 through which a plate-shaped external circuit connection terminal and a ground terminal 8 are inserted into the front notch of a metal box-shaped container, and attaching a flange to the front opening. In a noise filter with a socket, in which a socket 10 is inserted and a circuit element constituting the noise filter is housed in the container, the upper end of the side wall of the box-shaped and shallow container main body has a height dimension on which the insulating plate 6 is placed. The center part of the front side wall is integrally formed with a grounding tongue that is bent horizontally inward at a predetermined point lower than the top edge and has a long hole parallel to the sidewall, and a grounding conductor plate is provided in the rear opening. The lid of the container is open at the back and bottom, and the front is cut out leaving pieces on both sides, and the inner piece of the ground terminal of the rectangular insulating plate is bent downward. The flange socket 10 is protruded from the bottom edge and inserted into the elongated hole of the earth connection tongue piece, and the flange socket 10 is inserted into the flange receiving plate 4 by fitting the earth terminal into the earth conductor plate to accommodate the constituent circuit elements and form a cross-sectional shape. This is a noise filter with a socket that is covered with a lid body.

[Effect]

The ground terminals of the insulating plate 6 and the flanged socket 10 only need to be inserted into their respective tongues, making it easy to store and assemble the circuit elements in the container body and to connect them.

〔Example〕

An embodiment of the noise filter with socket of the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view showing the lid 21 and the state in which the rectangular insulating plate 6 and the flanged socket 10 are attached to the metal container body 14, and FIG. 2 is an external perspective view showing the container body 14, the rectangular insulating plate 6 and the flanged socket. An exploded view showing the socket 10 is shown.

As shown in FIG. 2, the container body 14 consists of a bottom lid-like body and a flange receiving plate 4 in which a grounding conductor plate 3 is integrally formed.

The bottom lid-shaped body has left and right side walls 16 provided on two opposite sides of the bottom plate 15, and a front side wall 17 provided on one of the other two sides and having a square central portion in the center.
A ground connecting tongue piece 18 is made by bending the front side wall 17 further, making a cut to the required depth on both sides of the middle high part of the front side wall 17, bending the middle high part inward at right angles along the line at the bottom, and providing an elongated hole 19 parallel to the front side wall. It is formed by providing

The height of the front side wall 17 is determined by the insulating plate 6 at its upper end.
The left and right side walls 16 have approximately the same height.

The upper surface of the ground connecting tongue piece 18 is at a height at which the lower edge of the insulating plate 6 comes into contact, or slightly lower than that, and the elongated hole 19 is located at a position facing the ground terminal 8 of the insulating plate 6.

The flange receiving plate 4 is integrally provided with a rectangular tongue piece 20 of approximately the same length as the height of the window at the lower edge of the central rectangular window, and a small tongue piece is formed by making incisions from both side edges near the free end of the tongue piece 20. A piece-shaped earthing conductor plate 3 is formed, the tongue piece 20 is bent at right angles along the lower edge of the window, and the earthing conductor plate 3 is formed by being bent along the bottom of the notch and pulled up vertically. Ru.

A container body 14 is formed by overlapping the rectangular tongue piece 20 on the bottom plate 15 by aligning the back opening edge of the bottom lid-like body and the lower edge of the window portion of the flange receiving plate 4 and by spot welding.

The lid body 21 has an opening at the bottom and the back, and a first opening at the front.
As shown in the figure, it has a box shape with both side pieces 22 left in a size that fits into the grooves 9 on both sides of the insulating plate 6, and the opening at the bottom has a size that fits the side walls 16 of the container body 14. It is.

The inner piece of the ground terminal 8, which is provided through the insulating plate 6, is bent downward at right angles to correspond to the elongated hole of the ground connecting tongue piece 18, so as to protrude from the bottom edge of the insulating plate 6 by a required length.

Now, place the insulating plate 6 on the front side wall 17 of the container body 14 by fitting its upper end into the groove 9 on the bottom edge of the insulating plate 6 and passing the downward protruding piece of the grounding terminal 8 through the elongated hole 19 of the grounding tongue piece 18. The insulating plate 6 is fixed by soldering the earth terminal 8 and the earth connecting tongue piece 18.

Next, fit the flange socket 10 into the window of the flange receiving plate 4 on the back of the container body 14 until the flange contacts the flange receiving plate 4, and pinch the ground terminal 11 with the small tongues of the grounding conductor plate 3. , the flange socket 10 is fixed by soldering the ground conductor plate 3 and the ground terminal 11.

The insulating plate 6 can be stably fixed without shifting by fitting into the groove 9 and inserting the downwardly protruding piece of the grounding terminal 8 into the elongated hole 19, and the grounding conductor plate 3 is integrated with the flange receiving plate via the tongue piece 20. Since the ground terminal 1 is formed as a
1 can be easily clamped, and the side wall 1 of the container body 14
6 is low, making soldering work extremely easy.

Noise filter constituent circuit elements such as a chiyoke coil and a capacitor are placed between the insulating plate 6 fixed to the container body 14 in this way and the flanged socket 10, and their lead wires are connected to the inner piece of the connecting terminal 7 and the connecting terminal 12. Connect with.

Since the side wall 16 of the container body 14 is low and the insulating plate 6 and the flanged socket 10 are firmly fixed, connection work such as tying and soldering is easy.

The grounding lead wire of the circuit element is pulled out to the outside through the notch in the side wall 16 of the container body 14.

Fit the side pieces 22 on the front side of the lid 21 into the grooves 9 on both sides of the insulating plate 6 to cover the container body 14 with the lid 21, and connect the container body 14 together with the grounding lead wire to the lid 21 by soldering. A noise filter with a socket is formed by joining the

[Effect of idea]

As explained above, according to the present invention, the noise filter with a socket has a small number of parts in the metal case, the assembly work is simple, and the connection between the insulating plate 6 and the ground terminal of the flanged socket 10 and the container is simple. Since the work and the connection work between the circuit elements and the connection terminals are easy, it can be manufactured at low cost and is suitable for automation of assembly work.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the noise filter with a socket according to the present invention showing an intermediate state of assembly, Fig. 2 is an exploded perspective view of the intermediate assembly of Fig. 1, and Fig. 3 is an exploded perspective view of a conventional example. FIG. In addition, 1, 14... Container body, 3... Grounding conductor plate, 4... Flange receiving plate, 6... Insulating plate, 7, 12
... Connection terminal, 8, 11 ... Earth terminal, 9 ...
Groove, 10... Flange socket, 13, 21... Lid, 16... Left and right side walls, 17... Front side wall, 18
...Earth connection tongue piece, 19...Elongated hole, 20...
Square tongue piece, 22...side piece.

Claims (1)

[Scope of utility model registration request] A rectangular insulating plate 6 through which an earth terminal 8 and a plurality of connection terminals 7 are inserted is provided on the front side, and a ground terminal 11 and a plurality of connection terminals 12 are installed through a collar receiving plate 4 that extends from both side walls from the rear side. A noise filter in which circuit elements are housed in a container body made of a metal material into which a flange socket 10 made of an insulating material is fitted with a flanged flange that comes into contact with the flange receiving plate 4 and is covered with a lid body 21. , an earth contact tongue piece 18 protruding toward the inside of the front surface of the bottom plate 15 with cutouts in both side walls, and the collar receiving plate 4 having a U-shaped earth conductor plate 3 protruding from the top at the tip. The grounding terminal 8 of the insulating plate 6 is fitted into the grounding tongue 18 of the container body 14, which has a rectangular tongue 20 formed integrally with the inner surface of the bottom plate 15, and
Further, the flanged socket 10 is inserted into the flanged receiving plate 4 by fitting the grounding terminal 11 into the grounding conductive plate 3, housing the constituent circuit elements, and covering it with a cover body 21 having a cross-sectional shape. A noise filter with a socket.