JP2541155B2 - Filter connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter connector, and more particularly, to an improvement for reducing the impedance on the ground side and an improvement in the manner of housing a filter element.

[0002]

2. Description of the Related Art Conventionally, there are various types and designs of filter connectors, which have been changed according to the situation where the filter connector is used.

For example, the filter connector shown in FIG. 7 is attached to an edge portion of a substrate (not shown) in an upright posture as shown. Therefore, L-shaped angle 1
However, bolts 3 and nuts 4 are attached to both ends of the metal case 2.
Mounted by. The through hole 5 provided in the horizontal portion of the L-shaped angle 1 is used when the filter connector is attached to the substrate.

The metal case 2 described above is constructed by combining the separately prepared front shell 6 and back shell 7. That is, the front shell 6 and the back shell 7 are fixed to each other by the method shown in FIG. 9 or 10. In FIG. 9, the front shell 6 and the back shell 7 are fixed by caulking the material of the front shell 6 side in the hole 16 through which the bolt 3 (FIG. 7) passes. In FIG. 10, for example, the front shell 6 and the back shell 7 are fixed by bending the claw 17 formed on the front shell 6 side toward the back shell 7 side.

A plurality of pins 8 are arranged inside the metal case 2 as shown in FIG. Pin 8
The one end constitutes the terminal portion 9, and the other end constitutes the electrical contact portion 10 with the mating connector (not shown). The filter connector just described is of the so-called male type, in which the electrical contact 10 projects in the front shell 6, and therefore the front shell 6
An opening 11 is formed in the. The mating connector is a so-called female type, and its electrical contact portion is inserted through the opening 11 of the front shell 6 and comes into contact with the electrical contact portion 10 of the illustrated filter connector.

Each pin 8 is held by an insulative front insert 12 and a back insert 13 arranged in the metal case 2. A tubular filter element 14 is arranged in a space between the front insert 12 and the back insert 13 with each pin 8 penetrating therethrough. The filter element 14 is, for example, a cylindrical capacitor, an LC filter, or the like, the electrode on the inner peripheral surface thereof is electrically connected to the pin 8, and the electrode on the outer peripheral surface thereof is electrically connected to the ground plate 15. To be done. Soldering is used for these connections. The ground plate 15 is soldered to the back shell 7 so that it is electrically connected and mechanically fixed.

As shown in FIG. 7, the terminal portion 9 of each pin 8 is bent downward. This is because the holes are directly inserted into the holes of the horizontally arranged substrate and are electrically connected. Further, in FIG. 10, the straight terminal portion 9 is shown.

[0008]

In the conventional example shown above, as shown in FIGS. 9 and 10, the electrical connection between the front shell 6 and the back shell 7 depends only on the mutual contact. Therefore, there is a problem that contact resistance occurs, and particularly when the ground is taken from the front shell 6 side, the impedance increases.

Further, the above-mentioned conventional example has a problem that a relatively large number of parts is required.

Further, the soldering of the ground plate 15 and the back shell 7 or the filter element 14 and the soldering of the filter element 14 and the pin 8 involve relatively complicated work.

Therefore, an object of the present invention is to make the impedance on the ground side extremely small, to allow the back shell to serve as a ground plate, and to easily solder the filter element to the back shell. The aim is to provide a filter connector.

[0012]

According to the present invention, a plurality of pins, one end of which constitutes a terminal portion and the other end of which constitutes an electrical contact portion with a mating connector, are located on the terminal portion side and the terminal Is held through an insulating insert in a case having a conductive surface divided into a back shell that penetrates through the portion and is led to the outside and a front shell that is located on the side of the electrical contact portion, and is held in the case by the insulating insert. Further, a plurality of cylindrical filter elements that are held in a state of penetrating the pins are arranged, the electrodes on the inner peripheral surface of the filter elements are electrically connected to the pins, and the outer periphery of the filter element is The present invention is directed to a filter connector, which is electrically connected to the back shell so that the electrode on the surface is grounded, and which solves the above technical problem. It is characterized in that it comprises the following configuration.

First, the insulating insert is sandwiched and positioned by the front shell and the back shell. The insulative insert has a plurality of pin receiving holes, both ends of which are open, for receiving each of the electrical contact portions of the plurality of pins. The pins are integrally positioned by the insulating insert.

Further, the back shell is provided with a plurality of through holes for penetrating the plurality of pins, respectively.
On the other hand, the front shell is provided with a cover wall that covers both end surfaces of the wall of the back shell in which the through hole is provided.

The filter element has a flange formed at one end thereof, and the other end is housed in each of the through holes, and the flange abuts against the inner surface of the back shell, whereby The end surface facing outward is positioned so as to be flush or substantially flush with the outer surface of the back shell.

Further, at least a part of the filter element is located closer to the terminal portion of the pin than a plane on which a portion where the cover wall of the front shell and the back shell overlap each other is located. Electrical connection between the shell and the back shell, electrical connection between the electrode on the outer peripheral surface of the filter element and the peripheral portion of each through hole, and electrical connection between the electrode on the inner peripheral surface of the filter element and each pin. The electrical connection is simultaneously achieved by one solder dip.

[0017]

According to the present invention, since the filter element is accommodated in the through hole of the back shell and the electrode on the outer peripheral surface of the filter element is soldered to the back shell, the back shell serves as a ground plate. Can have the function of. Therefore, the impedance can be made extremely small as compared with the case where a ground plate is separately used.

Further, since the back shell is soldered to the front shell and fixed to each other, a reliable electrical conduction state is obtained between the back shell and the front shell, and the ground of the filter connector is connected to the front shell side. Even when it is taken from the inside, the impedance can be prevented from increasing due to the contact resistance between the front shell and the back shell.

Further, since the pins are positioned by the insulating insert and the insulating insert is positioned by sandwiching the front shell and the back shell, the pins cannot be displaced. The pin is also held by the backshell via the filter element, so that the backshell has a conventional back insert (FIGS.
It is also possible to have a function as an element indicated by "13" in FIG.

As described above, when the pins are properly positioned, the operation of attaching / detaching to / from the mating connector can be carried out smoothly, and the damage of each part of the filter connector due to the displacement of the pins can be prevented. be able to.

Further, the number of parts can be reduced by the amount that the ground plate and the back insert are omitted.

Further, since the back shell and the front shell are combined to hold the insulating insert, the strength is enhanced and damage to the filter element due to external stress can be prevented.

Further, since the plurality of pins can be integrally handled while being held by the insulating insert, the filter connector can be easily assembled.

Further, since at least a part of the filter element is located on the terminal side of the pin with respect to the plane where the cover wall of the front shell and the back shell overlap each other, at least part of the filter element is located. Soldering, soldering the electrodes on the outer peripheral surface of the filter element to the peripheral edge of each through hole, and soldering the electrodes on the inner peripheral surface of the filter element to each pin without attaching solder to unnecessary parts. , Can be achieved simultaneously with a single solder dip.

Further, even if the solder dip is applied as described above, since the end surface of the filter element facing the outside is flush or nearly flush with the outer surface of the back shell, the following problems may be encountered. There is no.

That is, if the end surface of the filter element facing the outside is located deeper than the outer surface of the back shell and a recess is formed, the solder is filled in the recess during solder dipping, and the pin and the back shell are separated from each other. There is a possibility of being short-circuited, but according to the present invention, this can be reliably prevented.

Further, since the end surface of the filter element facing the outside and the outer surface of the back shell are flush or substantially flush with each other, the mechanical strength of the filter element can be increased. This is because if the end face of the filter element facing the outside is located above the outer surface of the back shell, the filter element may be damaged when the pin is bent by the force applied from the outside to the pin. However, according to the present invention, this can be prevented.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A filter connector 21 according to an embodiment of the present invention is shown in FIGS.

The filter connector 21 having the structure shown in FIG. 1 when completed is composed of the parts shown in FIG. That is, the metal case 22 is divided into the front shell 23 and the back shell 24. And
An insulating insert 26 made of resin or the like and a pin 2 formed by punching out a thin metal plate are provided in the metal case 22.
7 and a filter element 28, for example a cylindrical condenser, are inserted. The insert 26 is held by the front shell 23 and the back shell 24.
In FIG. 5, the pin 27 and the filter element 2 are shown.
Although only one each of 8 is shown, the filter connector 21 to be obtained by this embodiment has 25 pins 27 and filter elements 28, respectively.
Is provided.

The front shell 23 is integrally formed from a thin metal plate by press molding. A tubular portion 30 is formed on one side of the flange plate 29 forming the relatively wide surface. The end surface of the tubular portion 30 is an opening 31. On the other side of the flange plate 29, four locking pieces 32 and two cover walls 33 are formed. Each of these cover walls 33 is provided with two cleaning through holes 34. Further, lock holes 35 are provided at both ends of the flange plate 29, respectively.

The insert 26 is provided with a projecting portion 36 that is received in the tubular portion 30 of the front shell 23, and a projecting portion 37 that engages with the flange plate 29 at this time.
The protruding portion 37 is formed with a notch step portion 37a corresponding to the position of the above-mentioned cleaning through hole 34. And the overhang part 37
Through the protrusion 36 to the plurality of pin receiving holes 3
8 are arranged in two rows. These pin receiving holes 3
8 is open at both ends.

The pin 27 has a terminal portion 39 at one end thereof and an electrical contact portion 40 at the other end thereof with a mating connector.
It is what constitutes. Since the filter connector 21 just described is a so-called female connector, the electrical contact portion 40 is formed into a bifurcated fork shape in order to receive the electrical contact portion of the mating male connector. It The fork-shaped electrical contact portion 40 is inserted into the pin receiving hole 38 as shown in FIG. In this way, when the pin 27 is inserted into the pin receiving hole 38, the pin 27 does not easily drop from the insert 26.

The filter element 28 may be a cylindrical capacitor as described above or an LC filter. The filter element 28 has a tubular shape such as a cylindrical shape as a whole, and a flange 41 is formed at one end thereof. Electrodes are formed on the inner peripheral surface and the outer peripheral surface of the filter element 28. The terminal portion 39 of the pin 27 described above is
It penetrates through this filter element 28.

The back shell 24 is manufactured by die casting from a metal such as a zinc alloy or an aluminum alloy. Therefore, it is relatively thick. At both ends 42 of the back shell 24, the front shell 2
A locking hole 43 corresponding to the locking hole 35 of No. 3 is provided. The locking hole 43 is preferably a screw hole. The end portion 42 is further formed with a bracket portion 44 that projects in the vertical direction. The bracket portion 44 is provided with a through hole 45 used when the filter connector 21 is attached to an appropriate substrate. Further, the end portion 42 has a notch 4 into which the locking piece 32 of the front shell 23 is fitted.
6 are formed. The notch 46 and the locking piece 32 may not be provided in particular.

A connecting wall 47 is formed so as to connect both ends 42 of the back shell 24. On both sides of the connecting wall 47, the rising walls 48 have end portions 42 so that a gap 49 is formed between the bracket portion 44 and the connecting wall 47.
Is formed to extend from.

A step portion 50 for positioning the cover wall 33 of the front shell 23 is formed on the upper end surface and the lower end surface of the connecting wall 47.

The connecting wall 47 is also provided with a plurality of circular through holes 51 corresponding to the positions of the pin receiving holes 38 described above. The size of these through-holes 51 is chosen so that they can accommodate the ends of the filter element 28 described above. When the filter element 28 is inserted into the through hole 51, the flange 41 of the filter element 28
Comes into contact with the peripheral portion of the through hole 51 to position the filter element 28.

The front shell 23, the back shell 24, the insert 26, the pins 27 and the filter elements 28 described above are assembled as shown in FIGS. 1 to 4. That is, the front shell 23 and the back shell 24 are prepared, the filter element 28 is housed in each through hole 51 of the back shell 24, and each pin 27 held via the insert 26 is passed through each filter element 28. And the front shell 23 and the back shell 24 are placed in the insert 2
6 are put together and put together. As a result, as well shown in FIG. 4, the pin 27 is closer to the terminal portion 39 side than the plane (shown by the broken line 71) where the portion where the cover wall 33 of the front shell 23 and the back shell 24 overlap each other is located. , At least part of the filter element 28 is located. Further, in this state, as also well shown in FIG. 4, the space 53 communicating with the cleaning through hole 34.
Is formed between the back shell 24 and the insert 26.

Next, soldering is performed in order to connect the above-mentioned components to each other. After that, the pin 27 prepared in a straight state is bent at a right angle at an appropriate portion of the terminal portion 39.

The above-mentioned soldering step will be described mainly with reference to FIG. The soldering process is performed such that one solder dip simultaneously solders all the desired soldering points. In this case, it is preferable to use a container-shaped mask 52 that receives the bracket portion 44, as shown by an imaginary line in FIG. The mask 52 includes the bracket portion 44 and the connecting wall 4 described above.
It is arranged so as to enter the gap 49 between the cover shell 7 and 7 and reach a position above the lower end edge of the cover wall 33 of the front shell 23 in FIG. The mask 52 is used to prevent the through hole 45 of the bracket portion 44 from being filled with solder. Therefore, when solder dipping is performed, the mask connector 52 does not flow into the mask 52. 21 can be submerged in the solder. Therefore, while keeping the vertical position of the posture shown in FIG. 2, by immersing the solder bath in the solder bath so that the solder liquid surface reaches the position of the broken line 71 in FIG. The solder reaches the liquid surface, where the front shell 23 and the back shell 24 are soldered. Also, of course, the soldering of the electrodes on the inner peripheral surface of the filter element 28 and the pins 27 and the soldering of the electrodes on the outer peripheral surface of the filter element 28 and the back shell 24 are simultaneously achieved.

When the above-described soldering is completed, the flux may remain inside the case 22 and near the filter element 28. In order to clean it, the above-mentioned cleaning through hole 34 is advantageously used.
As described above with reference to FIG. 4, the cleaning through hole 34 communicates with the space 53 between the back shell 24 and the insert 26 through the notch step portion 37 a, and the cleaning through hole 34 is provided. If a cleaning solution such as trichlorethylene is flowed through, the flux can be easily discharged.

In the filter connector 21 obtained as described above, the end surface of each filter element 28 facing the outside is flush with or substantially flush with the outer surface of the connecting wall 47 of the back shell 24. If the end surface of the filter element 28 facing the outside is deeper than the outer surface of the connecting wall 47 and a recess is formed, the solder is filled in the recess during the solder dip, and the pin 27 and the back shell 24 are separated from each other. May be short-circuited. On the other hand, when the end surface of the filter element 28 facing the outside is located so as to project from the outer surface of the connecting wall 47, the filter element 28 is damaged when the pin 27 is bent by the force applied to the pin 27 from the outside. May occur. The above configuration is
These problems are solved advantageously.

FIG. 6 is a perspective view showing the positional relationship when the filter connector 21 described above is connected to the mating connector 54.

Since the filter connector 21 is a female type as described above, the mating connector 54 is constructed as a male type. The mating connector 54 includes a tubular portion 55 that receives the tubular portion 30 of the filter connector 21 therein, and the electrical contact portion 5 of the pin is provided inside the tubular portion 55.
6 is provided so as to project. The electrical contact portion 56 enters the pin receiving hole 38 from the opening 31 shown in FIG. 2, and is sandwiched between the fork-shaped electrical contact portions 40. The pin having such an electrical contact portion 56 is held by an insulating insert 57.

Further, the end portions 5 are arranged on both sides of the mating connector 54 in a symmetrical positional relationship with the filter connector 21.
8 are formed. Further, the end portion 58 has a locking hole 60.
Is formed.

Although the lock hole 43 on the filter connector 21 side is a screw hole, the lock hole 60 on the mating connector 54 side may be a normal hole.

As described above, in order to fix the state in which the tubular portion 55 of the mating connector 54 is covered on the tubular portion 30 of the filter connector 21 and the electrical connection is achieved,
The lock screw 62 is used. Rock screw 62
Is provided with, for example, a hexagonal head portion 63 and a shaft portion 64 on which a male screw is cut, and a female screw portion 65 is further formed at the tip end portion of the head portion 63. First, the shaft portion 64 of the lock screw 62 is screwed into the lock hole 43, which is the screw hole described above. Then, when the mating connector 54 is mated, the female screw portion 65 and the locking hole 60 are aligned with each other, and the set screw 66 is inserted through this and screwed into the female screw portion 65. In this way, the two connectors 21 and 54 are mechanically fixed to each other.

It should be noted that a normal screw is used without using the specially shaped lock screw 62 as described above, and this screw is inserted from the position of the set screw 66 into the lock hole 43 after passing through the lock hole 60. You may substitute by screwing.

In FIG. 6, the mating connector 54 is shown as
The male type is shown. The male connector 54 can also be realized by a configuration substantially similar to that of the female filter connector 21. That is, the present invention can be applied to a female type filter connector and a male type filter connector only by changing the shapes of the electrical contact portions of the pins and the inserts. The connector 54 shown in FIG. 6 is also an example of the connector, and the appearance of “6
What is indicated by "7" is a front shell, and what is indicated by "68" is a back shell. The combined state of the front shell 67 and the back shell 68 and the positional relationship of the filter element and the pin with respect to the back shell 68 are substantially the same as those of the filter connector 21. Further, the connector 54 also has a cleaning through hole 69.

As described above, although one embodiment of the present invention has been described with reference to the drawings, it is possible that another embodiment is not shown.

For example, the back shell 24 may be made of plastic and the surface of which is plated with metal.

The back shell 24 may be formed by cutting metal. Also, the terminal portion 39 of the pin 27
May be linearly extended, or the bracket portion 44 may not be formed.

Further, the cleaning through hole is not always necessary.

[Brief description of drawings]

FIG. 1 is a filter connector 2 according to an embodiment of the present invention.
It is a perspective view of FIG.

2 is a plan view of the filter connector 21 of FIG.
A part is broken away to show the cross section.

FIG. 3 is a side view of the filter connector 21 of FIG.

4 is a cross-sectional view of the filter connector 21 of FIG. 1, showing a cross section passing through the cleaning through hole 34 and one pin 27. FIG.

5 is an exploded perspective view showing components constituting the filter connector 21 of FIG. 1. FIG.

6 is a perspective view showing a positional relationship for achieving connection between the filter connector 21 of FIG. 1 and a mating connector 54. FIG.

FIG. 7 is a perspective view showing a conventional filter connector.

FIG. 8 shows the filter connector of FIG. 7 in a section through the pin 8.

FIG. 9 shows a first conventional method for fixing the front shell 6 and the back shell 7 together.

FIG. 10 shows a second conventional method for fixing the front shell 6 and the back shell 7.

[Explanation of symbols]

21 filter connector 22 metal case 23 front shell 24 back shell 26 insert 27 pin 28 filter element 33 cover wall 39 terminal part 40 electrical contact part 51 through hole 54 mating connector 71 part where cover wall and back shell overlap each other The plane on which to position

Claims (1)

(57) [Claims] 1. A plurality of pins, one end of which constitutes a terminal portion and the other end of which constitutes an electrical contact portion with a mating connector,
Hold via an insulative insert in a case that has a conductive surface that is divided into a back shell that is located on the terminal portion side and penetrates through the terminal portion and is led out to the outside, and a front shell that is located on the electrical contact portion side Further, in the case, a plurality of cylindrical filter elements that are held with the pins penetrating are further arranged, and the electrodes on the inner peripheral surface of the filter elements are electrically connected to the pins. And a filter connector electrically connected to the back shell so that an electrode on the outer peripheral surface of the filter element is grounded, wherein the insulating insert is formed by the front shell and the back shell. Clamped and positioned, and the insulative insert separates each of the electrical contacts of the plurality of pins. A plurality of pin receiving holes, both ends of which are open for receiving, and the plurality of pins are integrally positioned by the insulating insert, and the back shell has a plurality of penetrating holes for respectively penetrating the plurality of pins. A hole is provided, the front shell is provided with cover walls respectively covering both end surfaces of the wall of the back shell in which the through hole is provided, and the filter element has a flange formed at one end thereof. , The other end is housed in each of the through holes, and the flange comes into contact with the inner surface of the back shell, so that the end surface of the back shell is flush or nearly flush with the outer surface of the back shell. Of the pin from a plane that is positioned in a state in which the portion where the cover wall of the front shell and the back shell overlap each other is positioned. At least a part of the filter element is located on the terminal portion side, electrical connection between the front shell and the back shell, an electrode on an outer peripheral surface of the filter element, and a peripheral portion of each through hole. 2. The filter connector according to claim 1, wherein the electrical connection between the electrodes and the electrodes on the inner peripheral surface of the filter element and the pins are simultaneously achieved by a single solder dip.