JPS629665Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector in which a noise filter element such as a feedthrough capacitor is coupled to a connector pin.

As various industrial and household electronic and electrical devices become more sophisticated and sensitive, prevention of malfunctions caused by noise generated by these devices and noise entering these devices from the outside has become an important issue. . In order to block such noise at the input/output ends of devices, input/output connectors have recently been proposed in which a noise filter element such as a feedthrough capacitor is coupled to a connector pin.

Figures 1A and 1B show an example of this type of connector, in which a housing 1 made of an insulating material such as plastic has a plurality of connector pins 2 protruding from its upper surface 1a at an appropriate height. A chassis 4 having through-holes 3 provided at the same pitch as the arrangement pitch of the connector pins 2 is inserted into each of the through-holes 3 in a non-contact state, while the housing 1 is inserted. A noise filter element 5 composed of a feedthrough capacitor or the like is coupled to the connector pin 2 placed on the upper surface 1a and protruding from the through hole 3 of the chassis 4, and then a shield case 6 is placed over the noise filter element 5. The structure is such that each of the connector pins 2 is led out from a through hole 7 provided in the upper surface 6a of the shield case 6.

When incorporating the noise filter element 5,
As shown in an enlarged view in FIG. 2A, preliminary solder layers 5c and 5d made of cream solder or the like are provided in advance on the electrodes 5a and 5b provided on both sides, and a connector pin is inserted into the through hole 5e of the noise filter element 5. 2 is inserted through the furnace or soldered using a soldering iron. Then, the preliminary solder layers 5c, 5
d is melted, and the electrodes 5a and 5b are electrically connected to the connector pin 2 or the chassis 4, respectively.

However, while the connector pin 2 is made of a plate material, the through hole 5 of the noise filter element 5
Since e is circular, when the connector pin 2 is inserted into the through hole 5e of the noise filter element 5, as shown in FIG. Then, a gap occurs due to the difference in shape between the two, and through this gap the soldering flux and the melted preliminary solder layer 5c or 5d flow out as shown by arrows A and B, resulting in poor conduction of the electrode 5a to the connector pin 2, Short circuits between the electrodes 5a and 5b may occur.

In addition, the connector pin 2 is made of a plate material and is easily bent, the noise filter element 5 is formed in a thin disk shape and has low mechanical strength, and the connector pin 2 is subject to external force. In this case, a concentrated load is applied to the noise filter element 5, which tends to cause breakage or cracking of the noise filter element 5, and also tends to cause thermal cracks or microcracks due to direct heating with a soldering iron.

Furthermore, since the electrodes 5a and 5b are asymmetrically formed, the noise filter element 5 has directionality, and when the noise filter element 5 is inserted into the connector pin 2, the electrode 5b is placed on the chassis 4 side. Therefore, it has been difficult to automate the insertion work of the noise filter element 5 to the connector pin 2.

The present invention eliminates the above-mentioned conventional drawbacks, and improves the strength and reliability of the electrical and mechanical connection between the noise filter element and the connector pin, and prevents continuity failures, short circuits, damage, cracks, and thermal cracks of the noise filter element. Another object of the present invention is to provide a connector that can prevent microcracks and the like and also allows automatic insertion of a noise filter element.

In order to achieve the above object, the present invention includes a housing made of an insulating material in which a plurality of connector pins are embedded, a chassis through which the connector pins are passed through in a non-contact manner, and a pair of electrodes through which the connector pins are passed through. In the connector, the noise filter element has the pair of electrodes on both sides in the thickness direction, and the noise filter element has the pair of electrodes on both sides in the thickness direction, and the noise filter element has a plurality of electrodes independently for each of the connector pins. Each of the plurality of noise filter elements has one of the pair of electrodes fixed to the chassis by soldering, and a surface of the other electrode of the pair of electrodes.
A conductor made of a metal plate through which the connector pin is inserted is brought into contact with the conductor, and the other electrode is fixed to the connector pin by soldering via the conductor.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The content of the present invention will be specifically described below with reference to the accompanying drawings, which are examples. FIG. 3A is a front sectional view of the connector according to the present invention, and FIG. 3B is a partially cutaway plan view thereof. In the figure, Figure 1, Figure 2
The same reference numerals as in the figures indicate functionally identical components. In this embodiment, a chassis 4 through which the connector pins 2 are passed through in a non-contact manner is provided on the upper surface of a housing 1 in which a plurality of connectors 2 are installed, and the connector pins 2 protrude from the chassis 4.
It has a structure in which a noise filter element 5 and a washer-like conductor 9 are inserted into the base of the filter.

The conductor 9 is made of a metal material with good solderability, and has an outer diameter comparable to that of the electrode 5a of the noise filter element 5, as shown in FIGS. 4A and 4B. The electrode 5a is soldered and fixed in contact with a preliminary solder layer 5c provided on the electrode 5a.
Further, the conductor 9 is provided at its center with an inner diameter portion 9a having approximately the same maximum diameter as the connector pin 2, and is inserted into the connector pin 2 with an appropriate pressing force.

By providing the conductor 9 as described above, the soldering flux and the melted preliminary solder layer 5c will not adhere to the surface of the conductor 9 during soldering and will not flow into the through hole 5e of the noise filter element 5. ,
The electrode 5a is reliably electrically connected to the connector pin 2 via the conductor 9, improving reliability.

Furthermore, since the noise filter element 5 has a structure reinforced by the conductor 9, which is a metal body, the noise filter element 5 is prevented from being damaged or cracked, and when soldering with a soldering iron, the noise filter element 5 is Since heating is performed indirectly via the conductor 9, thermal cracks and microcracks are also prevented from occurring.

Furthermore, since the base of the connector pin 2, on which external forces tend to concentrate during use, is reinforced by the conductor 9, the mechanical strength of the connector pin 2 is increased.
It won't bend easily. Moreover, since the substantial bonding area between the noise filter element 5 and the connector pin 2 is expanded to the bonding area between the conductor 9 and the preliminary solder layer 5c, the external force applied to the connector pin 2 is The pressure is evenly distributed and received depending on the joint area. As a result, combined with the reinforcing effect of the conductor 9 on the noise filter element 5, the resistance force against the external force applied to the connector pin 2 becomes extremely large, and the noise filter element 5
This will further effectively prevent damage, cracking, etc.

Electrodes 5a and 5b of the noise filter element 5
are symmetrically provided at substantially the same position on both sides, as shown in FIG. That is, the inner diameter of the electrode 5a,
The outer diameters are d ₁ and d ₂ , and the inner and outer diameters of the electrode 5b are d ₃ ,
When d ₄ , d ₁ = d ₃ and d ₂ = d ₄ are formed. With such an electrode structure, the directionality of the noise filter element 5 is lost, and when it is inserted into the connector pin 2, even if the electrode 5d is placed on the chassis 4 side, or conversely, the electrode 5b is placed on the chassis 4 side. Therefore, the noise filter element 5 can be automatically inserted into the connector pin 2 using an automatic insertion machine or the like, thereby improving assembly work efficiency and ensuring mass productivity.

In the embodiment, stepped portions 1b and 1c are provided in a part of the housing 1, and a recessed portion 1 is provided between the stepped portions 1b and 1c.
0 and on the step portions 1b and 1c,
The structure is such that a chassis 4 having a notch hole 11 is provided to bridge this. With this structure, after soldering the connector pin 2, chassis 4, noise filter element 5, and conductor 9,
Before filling the insulating resin 8, cleaning water is also poured into the recess 10 on the back side of the chassis 4 through the notch hole 11, so that soldering flux adhering to the back side can be easily and reliably removed. After this, when filling the insulating resin 8, the notch hole 1
By filling the insulating resin 8 into the recess 10 through the insulating resin 8, the insulation properties can be improved.

Further, if the upper surface 6a of the shield case 6 is recessed to the position of the chassis 4 so as to be used also as the chassis 4, the independent chassis can be omitted. Further, the noise filter element 5 is not limited to a dielectric ceramic capacitor, but may also be a semiconductor ceramic capacitor such as a grain boundary insulation type or a reduction/reoxidation type, or an L-C composite type that combines a capacitor with ferrite beads, etc. Alternatively, it may be a composite capacitor that shares some of the connector pins 2.

As described above, the present invention includes a housing made of an insulating material in which a plurality of connector pins are embedded;
A connector comprising a chassis through which the connector pin passes through in a non-contact manner, and a noise filter element through which the connector pin passes through and a pair of electrodes are electrically connected to the chassis and the connector pin, respectively, wherein the noise filter element teeth,
Each of the plurality of noise filter elements has the pair of electrodes on both sides in the thickness direction, and a plurality of noise filter elements are independently provided for each of the connector pins, and each of the plurality of noise filter elements includes:
One of the pair of electrodes is soldered and fixed to the chassis, and a conductor made of a metal plate through which the connector pin is inserted is brought into contact with the surface of the other electrode, and the other electrode is connected to the chassis through the conductor. Since it is characterized in that it is fixed to the connector pin by soldering, it has the following effects.

(1) When a noise filter element is soldered to a connector pin, the conductor prevents the solder from flowing out and prevents poor continuity and electrode shorts, thereby improving the reliability of electrical connections. can.

(2) The mechanical strength of the noise filter element can be reinforced with a conductor to prevent damage, cracking, etc.

(3) Since heat conduction to the noise filter element during soldering with a soldering iron is indirect heat conduction via the conductor, generation of thermal cracks and microcracks in the noise filter element is prevented.

(4) The base of the connector pin, where external forces tend to concentrate, is reinforced with a conductor, the substantial joint area between the noise filter element and the connector pin is expanded to the plane area of the conductor, and the noise filter element is Since the reinforcing action of the conductor is added to the connector pin, the resistance force against external force applied to the connector pin becomes large, and damage and cracking of the noise filter element due to external force is effectively prevented.

(5) As shown in the example, by symmetrically providing a pair of electrodes on both sides of the noise filter element, the directionality of the noise filter element can be eliminated and the insertion of the noise filter element into the connector pin can be automated. This has the advantage of improving assembly workability and ensuring mass productivity.

[Brief explanation of the drawing]

Figure 1A is an exploded perspective view of a conventional connector;
Figure B is a front view with partial defects in the assembled state, Figure 2A is a partially enlarged sectional view for explaining the defect, Figure 2B is a partially enlarged plan view, and Figure 3A is the book. A front cross-sectional view of the connector according to the invention, FIG. 3B is also a partially broken plan view, FIG. 4A
4B is a partially enlarged sectional view, FIG. 4B is a partially enlarged plan view, and FIG. 5 is a front sectional view of the noise filter element according to the present invention. 1...Housing, 2...Connector pin, 3...
...Through hole, 4... Chassis, 5... Noise filter element, 5a, 5b... Electrode, 9... Conductor, 9a
...Inner diameter part.

Claims (1)

[Claims for Utility Model Registration] (1) A housing made of an insulating material into which a plurality of connector pins are embedded, a chassis through which the connector pins are passed through in a non-contact manner, and a pair of electrodes through which the connector pins are passed through. In the connector, the noise filter element has the pair of electrodes on both sides in the thickness direction, and the noise filter element has the pair of electrodes on both sides in the thickness direction, and the noise filter element has a plurality of electrodes independently for each of the connector pins. Each of the plurality of noise filter elements is made of a metal plate having one of the pair of electrodes fixed to the chassis by soldering, and the connector pin inserted through the other surface of the electrode. A connector characterized in that conductors are brought into contact with each other, and the other of the electrodes is soldered and fixed to the connector pin via the conductor. (2) the pair of electrodes of the nozzle filter element are
The connector according to claim 1, wherein the connector is provided symmetrically on both sides in the thickness direction.