JPH0412625Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Industrial application field> The present invention relates to a filter connector.

<Prior art> As a conventional filter connector, for example,
A filter element using only a capacitor as shown in the figure is known. In the conventional filter connector shown in FIG. 9, the contact portions (not shown) of a plurality of connector pins b are housed in a connector housing a, and then the portions of each connector pin b that protrude from the connector housing a are stepped. Insert the cylindrical capacitor c with the cylindrical capacitor c, and insert the chassis plate d from above.
It is constructed by soldering the required parts and then bending each connector pin at right angles. The conventional filter connector having such a configuration is used by soldering its tip b1 to the circuit pattern of the printed circuit board e.

<Problems to be solved by the invention> In the conventional example with such a configuration, as shown by the solid line in the characteristic diagram of FIG. It could not be used when the characteristic was requested.

Therefore, as shown by the broken line in FIG. 10, L
In addition to type filter connectors, T type and π type filter connectors are also known. In these filter connectors, the filter element has an inductor component in addition to a capacitor component, but in order to add the inductor component, parts such as ferrite beads must be assembled, which inevitably increases the number of parts. As the number increased, the external dimensions became larger, and there were problems such as being disadvantageous in terms of price.

In view of these conventional problems, it is an object of the present invention to provide a filter connector that has excellent insertion loss characteristics, is compact, and is relatively inexpensive.

<Means for solving the problem> In order to achieve this purpose, this invention
The pin guide is composed of a ferrite core block that acts as an inductor, and a slit is formed between each insertion hole of the pin guide to prevent magnetic interference between adjacent connector pins.

<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 shows a first embodiment of the present invention.
Figure a is a plan view of the filter connector according to this embodiment, Figure 1b is a side view thereof, and Figure 1c is a
is its equivalent circuit diagram. Note that in this example, L
This figure shows an example of a type filter connector.
In these figures, a large number of connector pins 2 are implanted in two rows, upper and lower, on the rear surface of a connector housing 1, and the connector pins 2 are inserted into a cylindrical capacitor 3 and soldered to each other. 2 is bent downward at a substantially right angle from the middle thereof to form two rows of downward pins, front and rear. A conductive case provided on the outer periphery of the connector housing 1 is soldered to the cylindrical capacitor 3, and both side walls 4a of the case 4,
A ferrite core block 5, which has a plurality of through holes 5a in engagement holes 4b, 4b provided at the lower part of the ferrite core block 4a, is inserted into the leg portion 5 of the ferrite core block with the connector pin 2 inserted into the through hole 5a.
The claws 5c and 5c provided on the outer sides of b and 5b are fitted and fixed.

Note that it is also possible to glue and fix the legs of the ferrite core block 5 to the case 4.

The filter connector of the first embodiment having such a configuration has an equivalent circuit shown in FIG. 1c,
The connector pin 2 is inserted into the insertion hole 6 of the printed circuit board 6.
A and soldered to the circuit pattern formed on the board 6, and the case 4 is attached by soldering to the ground pattern formed on the board 6.

In this way, during assembly, it is only necessary to fit or adhere the ferrite core block 5 to the case 4, making the assembly work very easy.

2 to 4 are plan views illustrating the ferrite core block 5 used in the filter connector of the above embodiment, and the ferrite core block 5 in FIG. 2 has through holes provided at a predetermined distance apart. 5a... A substantially cross-shaped slit 5d is provided between the slits 5d, and the slits 5d in the horizontal direction in the figure are communicated with each other, and the ferrite core block 5 in FIG. One slit 5d is provided in the left and right through holes 5a.
...A slit 5d cut from the edge of the ferrite core block 5 is provided in between, and the ferrite core block 5 shown in FIG.
A cross-shaped slit 5d is provided at the center of the through-holes 5a adjacent to each other on all sides, and a small-scale slit 5 is provided between all the adjacent through-holes 5a inwardly from the edge of the ferrite core block 5.
d... is provided.

Each through hole 5 of this ferrite core block 5
The slit 5d provided between the terminals a and 5a is useful for preventing magnetic interference between adjacent terminals (connector pins 2), and is also effective for reducing the weight of the ferrite core block.

FIG. 5 shows a second embodiment of the present invention;
Figure a is a side view of the filter connector according to this embodiment, and Figure 5b is its equivalent circuit diagram. Note that this embodiment shows another example of the L-type filter connector. The filter connector of this embodiment has a large number of connector pins 2 implanted in two rows of upper and lower rows on the rear surface of a connector housing 1, which are bent in advance at an almost right angle downward from the middle of the pins so as to form downward-facing pins in two rows of front and rear rows. The vertical portion of the connector pin 2 is inserted through the through hole 5a of the ferrite core block 5' and fixed with adhesive or the like, and the cylindrical pins attached in two rows to the horizontal portion of the L-shaped chassis plate 41 are placed below the pin 2 through the through hole 5a of the ferrite core block 5'. The capacitor 3 is inserted into the L-shaped chassis plate 4.
1 is fixed to the rear surface of the connector housing 1. In addition, the chassis plate 4
On the bottom surface of 1 are the two rows of cylindrical capacitors 3, 3.
A ground terminal 7 is provided between them.

The ferrite core block 5' used in the filter connector of this embodiment has a shape obtained by cutting out the legs 5b, 5b of the ferrite core block 5 shown in FIGS. 2 to 4.

The filter connector of this embodiment is easy to assemble because it is only necessary to insert the ferrite core block 5' into the vertical portion of the connector pin 2 and adhere it.

FIG. 6 is a side view showing a filter connector according to a third embodiment of the present invention. Note that this embodiment also shows still another example of the L-type filter connector. In the filter connector of this embodiment, a large number of connector pins 2 horizontally implanted in two rows above and below on the rear surface of a connector housing 1 are inserted into through holes 5a of a ferrite core block 5'. A U-shaped chassis plate 4 is placed in contact with the rear surface of the connector housing 1 and located at the rear thereof.
The connector pin 2 is inserted into the cylindrical capacitor 3 attached to the cylindrical capacitor 2, and the engagement hole 4c provided in the upper arm of the chassis plate 42 is connected to the claw part protruding from the upper surface of the connector housing 1. 1a,
Furthermore, the engagement hole 4d provided in the lower arm portion of the chassis plate 42 is fitted into the claw portion 1b protruding from the lower surface of the connector housing 1, and the connector pin 2 is then fixed. The pins are bent downward at almost right angles to form two rows of downward pins, front and rear.

The filter connector of this embodiment has a chassis plate 4
By fitting and fixing ferrite core block 5' to connector housing 1 as described above, ferrite core block 5' is also fixed, so there is an advantage that the work of fixing ferrite core block 5' with adhesive or the like can be omitted. , assembly work is very easy.

FIG. 7 shows a fourth embodiment of the present invention, FIG. 7a is a side view of a filter connector according to this embodiment, and FIG. 7b is an equivalent circuit diagram thereof. In the filter connector of this embodiment, a large number of connector pins 2 are directly installed in two rows of upper and lower rows on the rear surface of a connector housing 1, and the connector pins 2 are bent in advance at an almost right angle downward from the middle of the connector housing 1 so as to form downward-facing pins in two rows of front and rear rows. , a chassis plate 4 that extends horizontally from the vertical part into two upper and lower stages.
A ferrite core block 5' is interposed between the cylindrical capacitors 3, 3 attached to the horizontal portions of 3, respectively, and a through hole in the ferrite core block 5' between the cylindrical capacitors 3, 3 in the upper and lower positions is inserted. 5a through which the downward bent portion of the connector pin 2 is inserted, the vertical portion of the chassis plate 43 is fixed to the rear surface of the connector housing 1, and the ferrite core block 5' is further bonded to the connector pin 2. .

Incidentally, the ferrite core block 5' may be sandwiched between the upper and lower cylindrical capacitors 3, 3 without being bonded.

This embodiment shows an example of a π-type filter connector, and by using a ferrite core block 5' as an inductor,
It has a compact structure, is easy to assemble, and can be manufactured at low cost.

FIG. 8 shows a fifth embodiment of the present invention.
Figure a is a side view of the filter connector according to this embodiment, and Figure 8b is its equivalent circuit diagram. The filter connector of this embodiment has a large number of connector pins 2 implanted in two rows of upper and lower rows on the rear surface of a connector housing 1, which are bent in advance at an almost right angle downward from the middle of the pins so as to form downward-facing pins in two rows of front and rear rows. Then, the through hole 5a of the first ferrite core block 5' is inserted into the downward bent portion and bonded, and the cylindrical capacitor 3 attached to the horizontal portion of the chassis plate 44 is inserted into the downward position, and further , a through hole 5 of the second ferrite core block 5' is located below it.
A is inserted and glued.

The chassis plate 44 is composed of a horizontal portion, an upward vertical portion at one end, and a downward vertical portion at the other end, and the upward vertical portion is fixed to the rear surface of the connector housing 1 after the connector pin is inserted. It is something that

Note that the first ferrite core block 5'
can also be fixed by adhering to the rear surface of the connector housing 1.

This embodiment shows an example of a T-type filter connector, and by using a ferrite core block as an inductor, it can be constructed compactly, and can be easily assembled and manufactured at low cost.

<Effects of the invention> As described above, according to the invention, the pin guide is composed of a ferrite core block, and this pin guide also serves as the inductor component of the filter, so the number of parts is reduced accordingly. It is possible to achieve compactness. Further, the labor of assembling inductor parts, which was conventionally necessary, can be omitted, and the assembly can be simplified and costs can be reduced.

Furthermore, since the slits are provided between the respective insertion holes of the pin guide, magnetic interference between adjacent connector pins can be reliably prevented.

Therefore, it is possible to easily obtain an L-type, T-type or π-type filter connector having excellent insertion loss characteristics.

[Brief explanation of the drawing]

Figures 1a, b, and c show a first embodiment of the filter connector according to the present invention, in which Figure 1a is a plan view, Figure 1b is a side view, and Figure 1c is a side view. 2 is a plan view showing an example of the ferrite core block, FIG. 3 is a plan view showing another example thereof, and FIG. 4 is a plan view showing another example thereof. 5a and 5b show a second embodiment of the present invention, with FIG. 5a being a side view thereof and FIG. 5b being an equivalent circuit diagram thereof. FIG. 6 is a side view showing a third embodiment of the present invention. 7a and 7b show a fourth embodiment of the present invention, with FIG. 7a being a side view thereof and FIG. 7b being an equivalent circuit diagram thereof. 8a and 8b show a fifth embodiment of the present invention, with FIG. 8a being a side view thereof and FIG. 8b being an equivalent circuit diagram thereof. Figure 9 is a side view of the conventional example; Figure 10 is a side view of the conventional example;
The figure is a graph showing the insertion loss characteristics of a conventional example. 1... Connector housing, 2... Connector pin, 5, 5'... Ferrite core block, 5d
...Slit.

Claims (1)

[Claims for Utility Model Registration] A pin guide having a plurality of insertion holes is attached to the outer surface of a connector housing in which a portion of each of the plurality of connector pins is housed, with each of the connector pins passing through these insertion holes. In the filter connector, the pin guide is composed of a ferrite core block that acts as an inductor, and a slit is provided between each insertion hole of the pin guide to prevent magnetic interference between adjacent connector pins. A filter connector characterized in that: