JPH08315921A - Filter built-in pin connector - Google Patents

Abstract

(57) [Abstract] [Purpose] With regard to a connector with a built-in element as a noise filter, it is an object to provide a pin connector with a built-in filter that improves productivity, reduces manufacturing cost, and improves reliability against thermal stress. To do. [Structure] Made of a thin metal plate in which a chip-type capacitor 8 mounted in a housing 7 provided on a side surface of a connector pin 6 press-fitted and held in an insulating housing 4 is fitted in a first recess 2 which is an upper space of a base 1. By elastically sandwiching the earth plate 14 between the U-shaped elastic tongue piece 10 formed by punching and bending and the connector pin 6, reliability and cost reduction can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin connector with a built-in filter in which a filter element for reducing electromagnetic interference is incorporated.

[0002]

2. Description of the Related Art A conventional filter-equipped pin connector is press-fitted into an insulating housing 32 as shown in FIG.
There is a method in which the through-type capacitor 31 is incorporated in each fixed connector pin 33, soldered to the metal plate 35, and grounded via the metal case 34. However, the difference in the thermal expansion coefficient between the insulating housing 32 and the metal plate 35 causes stress and damage to the feedthrough capacitor 31 and the soldering portion, and the feedthrough capacitor 31 is generally expensive. However, there are various problems such as difficulty in replacing the through-type capacitor 31 that is soldered in, for example, when performing a study while replacing the capacitor in the development stage of the device.

As a method for solving these problems, a method of using a chip type capacitor and a method of pressing and joining a capacitor electrode portion with an elastic piece are disclosed, for example, in Japanese Unexamined Patent Publication No. Heisei 4-
It is disclosed in Japanese Patent Laid-Open No. 144080 and Japanese Patent Laid-Open No. 4-26085.

[0004]

However, all of these are required only when the connector needs to have a high shielding property and the mounting method to the device is restricted so that the shield case must be attached to the insulating housing. This is an effective means, and if not, a more advantageous means for reducing the cost and downsizing of the connector has been demanded.

The present invention is intended to solve such a conventional problem, and a filter element for reducing electromagnetic interference can be incorporated at a low cost and can be downsized, which is resistant to heat stress, and replacement of the filter element is also possible. It is an object of the present invention to provide an easy filter built-in pin connector.

[0006]

In order to solve the above-mentioned problems, a pin connector with a built-in filter according to the present invention has a plurality of connector pins press-fitted and fixed to a base portion, and has a recess on the upper and lower sides thereof. A filter element housing is provided on the base, and elastic tongue pieces formed by punching and bending an elastic metal plate ground plate positioned on the peripheral wall of the recess are elastically sandwiched between the electrode parts at both ends of the filter between the elastic tongue and the connector pin. It is configured to do.

[0007]

Therefore, according to the present invention, the noise that flows in through the connector pin is removed by the filter element, and the filter element mounting portion is housed in the concave portion on the upper side of the insulating housing, so that the size can be reduced. In addition, since it is not necessary to cover the metal case, the cost is low.

Further, since the filter element is not fixed by soldering or the like but is sandwiched by the spring pressure of the elastic tongue, stress may be applied due to the difference in coefficient of thermal expansion between the components when the operating temperature changes. Absent.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A filter built-in pin connector according to an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, a hole 5 formed in the base 1 is provided for an insulating housing 4 made of molded resin in which first and second recesses 2 and 3 are formed in the lower and upper portions of the base 1. , One end is housed in the first recess 2, the other one is fixed with the connector pin 6 protruding from the opening of the second recess 3, and the base 1 is provided with the second recess 3 side. A filter element housing portion 7 is provided so as to be in contact with the connector pin 6.

The filter element housing portion 7 is a groove having a flat bottom surface formed by digging the base portion 1, one end faces the side surface of the connector pin 6, and the end portion facing this is open,
The electrodes of the chip-type capacitor 8 housed here are made to slightly project from the groove. A chip type capacitor 8 as a filter element having electrodes on both ends is housed in the filter element housing portion 7 obtained in this way so that the electrode on one side is in contact with the connector pin 6.

Reference numeral 14 is a ground plate made of a thin elastic metal plate, and the outer periphery of the flat plate portion parallel to the base portion 1 of the housing 4 is positioned on the peripheral wall of the second recess 3 of the housing 4 and the connector of the flat plate portion is provided. The U-shaped elastic tongue piece 10 formed by punching and bending a plurality of U-shaped holes 9 through which the respective connector pins can pass through at the position of the pin 6 is further bent and the other side of the chip-type capacitor 8 described above. The chip-type capacitor 8 is pressed against the connector pin 6 by elastically contacting the electrode.

Further, a terminal portion 11 for connecting the ground plate 14 to a ground circuit is provided in a portion of the ground plate 14 which is bent upward above the end portion in the longitudinal direction.

Here, the ground plate 14 is connected to the insulating housing 4
The grounding plate 14 is provided with a protrusion 12 at the parallel end of the flat plate portion and a notch 13 at the upper portion of a vertical surface parallel to the grounding plate 14, and the lower part of the inner wall surface of the second recess 3 of the housing 4 is shown in FIG.
After inserting the protrusion 12 of the ground plate 14 into the locking hole 15 shown in FIG. 1, the entire ground plate 14 is pushed in, and the locking claw 16 and the notch 13 of the ground plate 14 provided at a position facing the locking hole 15 are provided. Lock.

With the above-mentioned structure, the chip-type capacitor 8 is pressed against the side surface of the connector pin 6 by the elastic tongue 10 and the electrodes at both ends are sandwiched by a predetermined pressure.

In addition, the flange 17 of the connector pin 6 provided at a position slightly higher than the height of the chip type capacitor 8.
The holding portion 18 obtained by folding back the tip of the elastic tongue piece 10 restricts the upward movement of the chip type capacitor 8.

When the pin connector with a built-in filter of this embodiment is incorporated in a device, the connector pin 6 and the terminal portion 1
1 is inserted into the hole of the printed circuit board and soldered, but in that case, the flux is scattered and enters the contact portion of the chip type capacitor 8, or the contact becomes unstable due to the entry of dust or dirt. In consideration of the above, if a dustproof cover 19 having an adhesive property on one side of an insulating film is attached to the upper portion of the ground plate 14, the space around the contact portion can be easily sealed and reliability can be improved. You can The portion through which the connector pin 6 penetrates may be a notch as shown in FIG. 1 or a hole.

Further, as shown in FIG. 4, if a ground plate having a flange portion 21 with a hole is provided by bending and extending the longitudinal end portion of the flat plate portion, the insulating housing 4 of the insulating housing 4 can be screwed to the housing 23 of the device. The flange portion 20 and the housing 23 are sandwiched and contact with each other, and the ground plate 14 can be easily connected to the housing to enhance the noise removing effect.

When it is desired to use any connector pin 6 as a ground pin, a radial cut 22 is provided around the hole of the flat plate portion of the ground plate 14 as shown in FIG. Further, although not shown, the elastic tongue piece 10 may be extended and brought into contact with the connector pin 6.

An example of a method of attaching the pin connector with a built-in filter of this embodiment to a device is shown in FIGS. 6 (a) to 6 (c).
Shown in The printed circuit board 24 having the filter built-in pin connector (in this case, the connector pin 6 is bent into an L shape) is housed in the box-shaped housing 23 whose upper and lower surfaces are opened, and the flange portion 20 of the insulating housing 4 is housed. The two screw holes 25 are fixed to the housing 23 with screws 26, and covers 27, 28 are attached to the upper and lower open surfaces of the housing 23.

[0021]

As is clear from the above description, in the pin connector with a built-in filter of the present invention, noise which is transmitted and received through the connector pin is surely removed by the chip type capacitor as the filter element.

Since the portion of the earth plate other than the terminal portion for connecting to the earth circuit is housed in the second recess of the insulating housing, the size can be reduced and the metal case need not be attached. It is cheap. Further, the ground plate can be easily removed by means such as tilting the locking claws of the insulating housing, and it does not take time and effort to replace the chip type capacitor. In addition, the connector pin, the chip-type capacitor, and the ground plate all have a structure in which they can be assembled from the second recess side, which has the advantage of good productivity.

Further, since the chip type capacitor which is the filter element is sandwiched by the spring pressure of the elastic metal plate,
High reliability because no stress is applied due to temperature change due to the difference in thermal expansion coefficient between the insulating housing and the ground plate or connector pin.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a pin connector with a built-in filter according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the same.

FIG. 3 is a perspective view showing a means for locking the ground plate of the insulating housing.

FIG. 4 is a perspective view of an embodiment in which a flange portion is formed on the ground plate.

FIG. 5 is a perspective view of an embodiment in which the top surface of the ground plate and the connector pin are brought into contact with each other.

FIG. 6 (a) is a plan view showing a state of attachment to a device (b) is a front view thereof (c) is a side view showing a state in which covers are attached to upper and lower open surfaces of a housing

FIG. 7 is an exploded perspective view of a conventional pin connector with a built-in filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base part 2 1st recessed part 3 2nd recessed part 4 Insulation housing 5 Hole 6 Connector pin 7 Filter element storage part 8 Chip type capacitor (filter element) 9 U-shaped hole 10 Elastic tongue 11 Terminal part 12 Protrusion 13 Notch 14 Grounding Plate 15 Locking Hole 16 Locking Claw 17 Brim 18 Holding Section 19 Dust Cover 20 Flange (Insulating Housing) 21 Flange (Grounding Board) 22 Notch 23 Housing 24 Printed Wiring Board 25 Screw Hole 26 Screw 27 Cover 28 cover

Claims (6)

[Claims] 1. A housing made of insulating resin, which has a plurality of through holes and a recessed portion above and below a base portion provided with a cutout-shaped storage portion that is connected to a part of the outer periphery of the through holes,
A housing provided in the base so that one of the connector pins made of a metal material, which is press-fitted and fixed through each through hole of the base, and one of the electrodes formed at both ends of the substantially rectangular parallelepiped are in contact with the connector pin. U-shaped cuts are made at predetermined positions so that the plurality of connector pins can be inserted in a non-contact manner, and the U-shaped portion is bent so that the tip end is the filter. An elastic thin plate metal which is formed on the base on the side where the filter element is housed, in which an elastic tongue is formed so as to elastically contact the other electrode of the element, and terminals for connecting to the earth circuit are provided at both ends. Built-in filter type pin connector consisting of a ground plate made of steel. 2. A flange part is provided on a part of the connector pin, and a pressing part is provided by bending the tip of a U-shaped elastic tongue piece. The pressing part and the lower surface of the flange part form upper surfaces of both ends of the filter element. The pin connector with a built-in filter according to claim 1, wherein the pin connectors are respectively held. 3. A pin with a built-in filter according to claim 1, wherein the upper portion of the ground plate is covered with a dustproof cover made of an insulating material that penetrates the connector pin, and the space around the filter element has a dustproof structure. connector. 4. An elastic locking claw is provided on the housing on the side where the ground plate and the filter element are arranged, and the ground plate and the filter element can be attached and detached by tilting the locking claw. The pin connector with a built-in filter according to any one of 1 to 3. 5. A flange portion with mounting holes is provided at the left and right ends of the insulating housing, and similar flange portions are also provided at the left and right ends of the grounding plate so that the two flange portions overlap each other and are attached to the device housing. The structure according to claim 1,
4) A filter-built-in pin connector according to any one of items 4 to 4. 6. A filter-built-in pin connector according to claim 1, wherein the ground plate is radially cut around a hole through which the connector pin of the flat plate portion penetrates, and the connector pin is press-fitted into contact to form a ground pin.