JPS61260565A - Filter connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to filter connectors, and in particular,
This relates to improvements to further reduce the impedance on the ground side.

SUMMARY OF THE INVENTION The present invention provides a filter connector that includes a case having a conductive surface that is divided into a back shell and a front shell, and in which a filter element is housed. By soldering this back shell to the front shell, the impedance on the ground side can be further reduced while providing the function of holding the filter element and connecting one electrode of the filter element to ground.

BACKGROUND OF THE INVENTION Traditionally, filter connectors have been available in various types and designs, and these have been modified depending on the situation in which the filter connector is used.

For example, the filter connector shown in FIG. 7 is attached to the edge of a substrate (U in the drawing) in an upright position as shown in the drawing. Therefore, an L-shaped angle 1 is attached to both ends of a metal case 2 with bolts 3 and nuts 4. A through hole 5 provided in the horizontal part of the L-shaped angle 1
is used when attaching this filter connector to the board.

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

Inside such a metal case 2, a plurality of pins 8 are arranged, as shown in FIG. One end of the pin 8 constitutes a terminal portion 9, and the other end constitutes an electrical contact portion 10 with a mating connector (not shown). The reaching filter connector has electrical contacts 10
is a so-called male type that protrudes inside the front shell 6, and therefore, an opening 11 is formed in the front shell 6. The mating connector is of the so-called female type, and its electrical contacts are inserted through the opening 11 of the front shell 6 and come into contact with the electrical contacts 10 of the illustrated filter connector.

Each pin 8 is held by an insulating front insert 12 and a back inlet 13 located within the metal case 2. A cylindrical filter element 14 is arranged in the space between the front insert 12 and the back insert 13 with each pin 8 passing through it. The filter element 14 is, for example, a cylindrical capacitor, an LG filter, etc., and an electrode on its inner circumferential surface is electrically connected to the pin 8, and an electrode on its outer circumferential surface is electrically connected to the ground plate 15. be done.

Soldering is used for these connections. The ground plate 15 is soldered to the back shelf, thereby providing an electrical connection and mechanical fixation.

Note that, as shown in FIG. 7, the terminal portion 9 of each pin 8 is bent downward. This is so that it can be inserted directly into a hole in a horizontally arranged board and electrically connected. Further, in FIG. 10, a straight terminal portion 9 is illustrated.

Problems to be Solved by the Invention In the conventional example illustrated above, FIGS.
As shown in the figure, the electrical connection between the front shell 6 and the back shelf depends only on mutual contact, so contact resistance occurs, and especially when grounding from the front shell 6 side, impedance There is a problem that increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a filter connector that can extremely reduce impedance on the ground side.

Means for Solving the Problem 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 penetrate through the terminal portion. It is held via an insulating insert in a case that has a conductive surface that is divided into a back shell that leads out to the outside and a front shell that is located on the side of the electrical contact part. A plurality of cylindrical filter elements are arranged, which are held in a state where they penetrate through the filter elements, and the electrodes on the inner circumferential surface of the filter elements are electrically connected to the pins, and the electrodes on the outer circumferential surface of the filter elements are connected to the ground. In the filter connector electrically connected to the case so as to be connected, in the present invention, the back shell is provided with a plurality of through holes through which the pins pass, and the filter element is provided with at least a portion of the through holes through each of the through holes. The pin is accommodated in the hole, and the electrode on the outer peripheral surface thereof is connected to the peripheral edge of each through hole by solder, and the pin passes through the filter element and is connected by solder to the electrode on the inner peripheral surface of the filter element. , the back shell is soldered to the front shell.

Effects of the Invention According to this invention, the filter element is housed in the through hole of the back shell, and the electrode on the outer peripheral surface of the filter element is connected to the back shell by solder. It is possible to have the function of Therefore, the impedance can be made extremely small compared to the case where a separate ground plate is used.

In addition, since the back shell and the front shell are soldered and fixed to each other, reliable electrical continuity can be obtained between the back shell and the front shell, and when the filter connector is grounded from the front shell side. Even in this case, increase in reimpedance due to contact resistance between the front shell and the back shell is prevented.

Furthermore, since the pin can be held in the back shell via the filter element, the back shell can also function as a conventional back insert.

For this reason, the number of parts can be reduced by the omission of the ground plate and back insert.

In addition, soldering at various points as mentioned above,
That is, the soldering of the pins, filter element, back shell and front shell to each other can also be achieved in one go by a solder dip.

Embodiment A filter connector 21 which is an embodiment of the present invention is a first embodiment.
As shown in FIGS.

The filter connector 21, which has a structure as shown in FIG. 1 when completed, is composed of parts as shown in FIG. 5. That is, the case 22 made of gold is divided into a front shell 23 and a back shell 24. And gold!
Inside the iR case 22, there is an insulating insert 26 made of resin or the like, and a pin 27 formed by beating a thin metal plate.
A filter element 28, such as a cylindrical capacitor, is then inserted. Although only one pin 27 and one filter element 28 are shown in FIG. 5, the filter connector 21 of this embodiment includes 25 pins 27 and 25 filter elements 28, respectively.

The front shell 23 is integrally formed from a gold RM plate by press molding. A cylindrical portion 30 is formed on one side of the relatively wide seven-lunge plate 29. The end surface of the cylindrical portion 30 is an opening 31 . On the other side of the flange plate 29, there are four locking pieces 32 and two covers g! 33 is formed. These cover walls 33 include
Two cleaning holes 34 are provided in each step. Furthermore, locking holes 35 are provided at both ends of the flange plate 29, respectively.

The insert 26 comprises a protrusion 36 that is received within the cylindrical portion 30 of the front shell 23 and an overhang 37 that then engages the flange plate 29. A cutout step portion 37a is formed in the overhang portion 37, corresponding to the position of the cleaning through hole 34 described above.

A plurality of pin receivers are provided with holes 38 arranged in two rows, extending from the projecting portion 37 to the projecting portion 36.

The holes 38 of these pin receivers are open at both ends.

One end of the pin 27 constitutes a terminal portion 39, and the other end constitutes an electrical contact portion 40 with a mating connector. Since the filter connector 21 that is being delivered is a so-called female connector, the electrical contact portion 40 has a forked fork shape in order to receive the electrical contact portion of the mating male connector. be done. This fork-shaped electrical contact portion 40 is inserted into the pin receiver hole 38 as shown in FIG. In this way, when the pin 27 is inserted into the hole 38, the pin 27 is prevented from easily falling off from the insert 26.

The filter element 28 may be a cylindrical capacitor or an LC filter as described above. The filter element 28 has a cylindrical shape as a whole, and a flange 41 is formed at one end thereof. Electrodes are formed on the inner circumferential surface and the outer circumferential surface of the filter element 28, respectively.

The terminal portion 39 of the pin 27 described above passes through the 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. Lock holes 43 corresponding to the lock holes 35 of the front shell 23 are provided at both ends 42 of the back shell 24 . This locking hole 43 is preferably a screw hole. End 4
2 is further formed with a bracket portion 44 that extends in the vertical direction. This bracket part 44 has a through hole 4 used when attaching the filter connector 21 to an appropriate board.
5 is provided. Furthermore, a notch 46 into which the locking piece 32 of the front shell 23 fits is formed in the end portion 42 . Note that the notch 46 and the locking piece 32 do not need to be particularly provided.

Connection I! so as to connect both ends 42I11 of the back shell 24! ! 47 is formed. A gap 4 is provided between the bracket portion 44 and the connecting wall 47 on both sides of the connecting wall 47.
A raised wall 48 is formed extending from the end 42 such that a 9 is formed.

Linking! On the upper and lower end surfaces of 1247 are the covers for the aforementioned front shell 23! Stepped portion 50 for positioning 33
is formed.

The connecting wall 47 is also provided with a plurality of circular through holes 51 corresponding to the positions of the holes 38 in the pin receiver described above. The size of these through holes 51 is determined by the size of the filter element 2 described above.
It has been chosen so that it can accept 8. More preferably, 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 edge of the through hole 51, and the filter element 2
8 is positioned.

The front shell 23, back shell 24, insert 26, multiple pins 27, and multiple filter elements 28 described above are assembled as shown in FIGS. 1 to 4, and in order to interconnect each component, Soldering is performed. Thereafter, the pin 27, which had been prepared in a straight state, is bent at a right angle at an appropriate location on its terminal portion 39.

For example, with reference to FIG. 2, the soldering process will be described. Soldering is performed by solder dipping. In this embodiment, a single solder dip achieves soldering at all desired locations. In this case, it is preferable to use a container-shaped mask 52 that receives the bracket portion 44, as shown in phantom lines in FIG. The mask 52 is attached to the bracket portion 44 described above.
and the connecting wall 47, entering the gap 11fl149,
In FIG. 2, the lower end edge of the cover wall 33 of the front shell 23 is arranged to reach the reat position.

The mask 52 is used to prevent the through hole 45 of the bracket part 44 from being filled with solder. Therefore, when solder is dipped, this filter connector is used to prevent the solder from flowing into the mask 52. 21 can be submerged in solder. Therefore, when the cover wall 33 is submerged in the solder bath while maintaining the vertical relationship shown in FIG. Soldering is accomplished.

Also, of course, soldering between the electrode on the inner circumferential surface of the filter element 28 and the pin 27, and the soldering between the electrode on the outer circumferential surface of the filter element 28 and the back shell 24
Soldering with is also accomplished at the same time.

When the above-described soldering is finished, flux may remain inside the case 22 and near the filter element 28. In order to clean this, the cleaning through hole 34 described above is advantageously used. Cleaning hole 3
4, as shown in FIG.
It communicates with the space 53 between the back shell 24 and the insert 26, and by flowing a cleaning liquid such as trichlorethylene through these cleaning holes 34, the flux can be easily discharged.

In the filter connector 21 obtained as described above, it is preferable that the outward facing surface of each filter element 28 is substantially flush with the outer surface of the connecting wall 47 of the back shell 24. This is because if the outer ends of the filter element 28 are located deeper than the outer surface of the connecting wall 47 and form a recess, the recess will be filled with solder during solder dipping, and the pin 27 and back This is because the shell 24 may be short-circuited.

On the other hand, if the outward facing end surface of the filter element 28 is located protruding from the outer surface of the connecting wall 47, the pin 2
This is because when the pin 27 is bent by a force applied to the pin 7 from the outside, the filter element 28 may be damaged.

FIG. 6 is a perspective view showing the arrangement 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 configured as a male type. The mating connector 54 has a cylindrical part 55 in which the cylindrical part 30 of the filter connector 21 is received, and inside this cylindrical part 55 a protruding electrical contact part 56 of a pin is provided. This electrical contact portion 56 enters into the hole 38 from the opening 31 shown in FIG. 2, for example, and is sandwiched between the fork-shaped electrical contact portions 40. The pin with such an electrical contact 56 is held by an insulating insert 57.

Furthermore, end portions 58 are formed on both sides of the mating connector 54 in a symmetrical position W1 relationship with the filter connector 21. Furthermore, a locking hole 60 is formed in the end portion 58 .

Note that the locking hole 4 on the filter connector 21 side described above
Although 3 is a screw hole, the locking hole 60 on the connector 54 side may be a normal hole.

As described above, the lock screw 62 is used to fix the state in which the cylindrical portion 55 of the mating connector 54 is placed over the cylindrical portion 3o of the filter connector 21 and electrical connection is established. In this embodiment, the lock screw 62 has a hexagonal prism head 63 and an externally threaded shank 64.
The tip of the head 63 further includes a female bevel 65.
is formed. First, the shaft portion 64 of the lock screw 62 is screwed into the lock hole 43, which is the screw hole described above. When the mating connector 54 is mated, the female threaded portion 65 and the locking hole 60 align, and the set screw 66 is passed through and screwed into the female threaded portion 65. In this way, the two connectors 21 and 54 are mechanically fixed to each other.

Note that the special shaped lock screw 62 as described above
Instead of using an ordinary screw, it may be replaced by passing it through the locking hole 60 from the position of the set screw 66 and then screwing it into the locking hole 43.

In FIG. 6, a male type connector 54 is shown as the mating connector 54. This male =1 connector 54 can also be realized with substantially the same configuration as the m-type filter connector 21. That is, the present invention can be applied to both female and male filter connectors by simply changing the shape of the electrical contact portion of the pin and the insert.

The connector 54 shown in FIG. 6 is an example thereof, and when looking at its appearance, the one not indicated by "67" is the front shell, and the one indicated by "68" is the back shell. The combined state of the front shell 67 and back shell 68 and the position of the filter element and pins relative to the back shell 68 are substantially the same as those of the filter connector 21. Further, a cleaning through hole 69 is formed in the connector 54 as well.

As described above, one embodiment of the present invention has been described with reference to the drawings, but other embodiments are also possible although not shown.

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

Further, the back shell 24 may be formed by cutting metal.

Further, the terminal portion 39 of the pin 27 may remain linearly extending, or the bracket portion 44 may not be formed.

Further, in the above-described embodiment, the front shell 23 has a cover wall 33 at the location where soldering is performed,
Although this is arranged so as to cover the back shell 24, conversely, an appropriate wall on the back shell side may be arranged to cover the front shell.Furthermore, such an overlapping part is not actively provided and it is simply a wall. It is also possible to solder the butted portions.

Further, a cleaning hole is not necessarily required.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a filter connector 21 according to an embodiment of the present invention. FIG. 2 is a plan view of the filter connector of FIG. 1, with a portion cut away to show a cross section. FIG. 3 is a side view of the filter connector 21 of FIG. 1. FIG. 4 is a cross-sectional view of filter connector 21 of FIG. 1, showing a cross section through cleaning hole 34 and one pin 27. FIG. FIG. 5 is an exploded perspective view of parts constituting the filter connector 21 of FIG. 1. FIG. 6 is a perspective view showing the positional relationship for achieving connection between the filter connector 21 of FIG. 1 and the mating connector 54. FIG. 7 is a perspective view showing a conventional filter connector. FIG. 8 shows the filter connector of FIG. 7 in cross section through pin 8. FIGS. 9 and 10 show conventional methods of fixing the front shell 6 and back shelf, respectively. In the figure, 21 is a filter connector, 22 is gold RIJ
Case, 23 is front shell, 24 is back shell,
26 is an insert, 27 is a pin, 28 is a filter element, 33 is a cover wall, 39 is a terminal portion, 40 is an electrical contact portion, 51 is a through hole, and 54 is a mating connector. Purity of drawings! # (No change in content) Figure 2 Figure 3 Figure 4 Figure 8 Procedural amendment (method) June 26, 1985 Commissioner of the Japan Patent Office t
l, Indication of the case Patent Application No. 102312 of 1985 2, Name of the invention Filter Connector 3, Person making the amendment Relationship to the case Patent applicant address 2-26-10 Tenjin, Nagaokakyo City, Kyoto Prefecture Name
(623) Murata Manufacturing Co., Ltd. Representative Mura 1)
1974, Agent Address: Yachiyo Daiichi Building, 2-3-9 Tenjinbashi, Kita-ku, Osaka Telephone: Osaka (06) 351-6239 Name: Patent Attorney <6474) Fukami Kube 1: 1. , Zu-・6, Drawings to be amended 7, Contents of amendment 1 A drawing drawn in ink is attached as attached. Please note that there are no changes to the content. that's all

Claims (4)

[Claims] (1) A bag in which 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 extend outside through the terminal portion. It is held via an insulating insert in a case having a conductive surface that is divided into a shell and a front shell located on the side of the electrical contact part, and the pin is further inserted into the case. A plurality of cylindrical filter elements are arranged to be held in this state, an electrode on the inner circumferential surface of the filter element is electrically connected to the pin, and an electrode on the outer circumferential surface of the filter element is grounded. In the filter connector electrically connected to the case, the back shell is provided with a plurality of through holes through which the pins pass, and the filter element has at least a portion inside each of the through holes. and an electrode on the outer peripheral surface thereof is connected to the peripheral edge of each through hole by solder, and the pin passes through the filter element and is connected to an electrode on the inner peripheral surface of the filter element by solder, and . A filter connector, wherein the back shell is soldered to the front shell. (2) The filter connector according to claim 1, wherein a portion of the wall of the front shell covers a portion of the wall of the back shell, and the soldering is applied to the covered portion. (3) The filter connector according to claim 1, wherein a portion of the wall of the back shell covers a portion of the wall of the front shell, and the soldering is applied to the covered portion. (4) The filter according to claim 1, wherein a portion of the wall of the front shell and a portion of the wall of the back shell are butted against each other, and the soldering is applied to the butted portion. connector.