EP0382148B1 - Noise filter connector - Google Patents

Noise filter connector Download PDF

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Publication number
EP0382148B1
EP0382148B1 EP90102247A EP90102247A EP0382148B1 EP 0382148 B1 EP0382148 B1 EP 0382148B1 EP 90102247 A EP90102247 A EP 90102247A EP 90102247 A EP90102247 A EP 90102247A EP 0382148 B1 EP0382148 B1 EP 0382148B1
Authority
EP
European Patent Office
Prior art keywords
housing
capacitors
shield case
holes
contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90102247A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0382148A3 (en
EP0382148A2 (en
Inventor
Hasegawa Izumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whitaker LLC
Original Assignee
Whitaker LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Whitaker LLC filed Critical Whitaker LLC
Publication of EP0382148A2 publication Critical patent/EP0382148A2/en
Publication of EP0382148A3 publication Critical patent/EP0382148A3/en
Application granted granted Critical
Publication of EP0382148B1 publication Critical patent/EP0382148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7197—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with filters integral with or fitted onto contacts, e.g. tubular filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/716—Coupling device provided on the PCB

Definitions

  • This invention relates to a noise filter connector or an electrical connector including noise filters.
  • the filter connector 1 comprises an insulation housing 2, an electrically-conductive shield case 3 covering the insulation housing 2, cylindrical capacitors 4 extending through the shield case 3 and soldered thereto, and electrically-conductive post or tab contacts 5 extending through the housing 2 and the capacitors 4 and soldered thereto. One end of each contact 5 is bent.
  • the housing 2, the shield case 3 and the capacitors 4 are made of plastic, electrically-conductive metal and ceramic dielectric material, respectively. Also, the capacitors 4 include metal film electrodes.
  • the filter connector 1 is mounted on a printed circuit board 6 in such a manner that the contacts are inserted into through holes formed in circuit patterns on the circuit board 6.
  • the filter connector 1 is mated with a complementary connector.
  • the contacts 5 of the conventional filter connector 1 are connected to the capacitors 4 in the metal shield case 3 and in engagement with the plastic housing 2. It is known that the materials of the housing 2 and the shield case 3 differ in thermal expansion coefficient. Additionally, one side surface of the housing 2 to retain contacts 5 is continuous. If the filter connector 1 having such housing 2 and shield case 3 is used under a certain environment encountering wide temperature changes, such difference in thermal expansion coefficient will cause displacement between both fixed points and, in turn, stress which will bend the contacts 5. A part of the stress affects the capacitors 4, thereby causing cracks in them which reduces capacitance or damaging the capacitors 4.
  • the housing 2 when the housing 2 is mated with or unmated from a matable complementary connector to insert or extract contact sections of the contacts 5 with respect to contact sections of the complementary connector, bending force resulting from a rocking movement is caused at the contact sections and transmitted to the capacitors, thereby causing the aforementioned damage to the capacitors.
  • One conventional means to avoid such problems is to reduce the number of contacts in a filter connector which decreases the entire physical dimension of such connector, thereby limiting the total magnitude of stress due to different coefficients of thermal expansion within a tolerable range.
  • This requires a plurality of housings each having a relatively small number of contacts if one needs a filter connecter having a large number of contacts.
  • Such housings are accommodated in a common shield case.
  • such a filter connector suffers from reduced contact installation, density, limits freedom of contact arrangement, and makes connector assembly more complicated and expensive.
  • the connector according to the present invention is directed to an electrical connector including noise filters comprising a dielectric housing, a metal shield case covering the outside of the housing, a plurality of capacitors mounted in holes in a wall of the shield case, and contacts extending through the center portions of the capacitors secured in the wall of the shield case and extending through holes of the housing.
  • the filter connector according to the present invention is characterized in that contact sections of the contacts extend loosely through the holes in the wall of the housing without engaging the walls of the holes.
  • the walls of the shield case and the housing are in engagement with each other or adjacent to each other. Portions of the capacitors extending inwardly from the inner wall surface of the shield case are freely received in larger diameter holes in the housing formed continuously and in alignment with the holes in the housing.
  • the contacts fixedly engaging the capacitors mounted on the shield case extend through the wall of the housing by loosely extending through the holes therein.
  • the shield case and the housing of the connector are preferably adjacent to each other for compact connector design.
  • the above construction of loosely inserting the contacts in the holes in the housing as well as portions of the capacitors extending inwardly from the shield case in the larger diameter holes in continuous and aligned relationship with the holes in the wall of the housing is effective to avoid any adverse effect between the contacts and the housing and also stress or damage to the capacitors.
  • the connector according to the present invention has a reinforcement member mounted on the wall of the shield case for retaining both end portions of the capacitors between the wall of the shield case and the reinforcement member through which the capacitors extend.
  • the capacitors are secured in the wall of the shield case near one end of each capacitor and also in the reinforcement member mounted on the wall of the shield case near the other end of each capacitor.
  • the capacitors are well protected from rocking movement at the contact sections when the connector housing is mated with or unmated from the matable complementary connector housing.
  • FIG. 1 is a perspective view of the entire connector of one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the connector in FIG. 1 perpendicular to the length of the connector.
  • FIG. 3 is a part perspective view illustrating the relationship between the through holes in the housing and the contacts.
  • FIG. 4 is a perspective view of another embodiment of the connector according to the present invention.
  • FIG. 5 is a cross-sectional view of the connector in FIG. 4 in a transverse direction.
  • FIG. 6 is a part perspective view of the connector in FIG. 4 seen from the inside thereof.
  • FIG. 7 is a part cross-sectional view illustrating the relationship between the shield case, the reinforcement member, the capacitors and the contacts.
  • FIG. 8 is a cross-sectional view, similar to FIG. 2, of a conventional connector.
  • a filter connector 11 includes an insulation housing 12, an electrically-conductive shield case 13, cylindrical capacitors 14, electrically-conductive post or tab contacts 15, and an inductor block 16.
  • the housing 12 is made of a suitable plastic material.
  • the shield case 13 is made of electrically-conductive metal.
  • the capacitors 14 are made of ceramic dielectric material and metal film electrodes.
  • the contacts 15 are made of electrically-conductive metal.
  • the inductor block 16 is made of ferrite material.
  • the housing 12 and the shield case 13 are open at their front ends and are mated with both rear walls 18, 19 engaging each other and secured together by a screw 17 from the shield case 13 into the housing 12.
  • the shield case 13 has extended side wall sections 20.
  • the rear wall 18 of the housing 12 has holes 21 in two vertical rows at a constant pitch in the length direction. Each hole 21 comprises an outer larger diameter section 22 and an inner smaller diameter section 23 formed continuously and concentrically in a stepped configuration.
  • Holes 24 are formed in the rear wall 19 of the shield case 13 in correspondence to the larger diameter sections 22 in the housing 12.
  • the capacitors 14 are inserted in the holes 24 and mounted thereon by soldering in the condition that flanges 25 of the capacitors 14 contact the outer surface of the rear wall 19 of the shield case 13.
  • portions of the capacitors 14 extending inwardly from the rear wall 19 are positioned in the larger diameter sections 22 in the housing 12 in such a manner that the outer surfaces of the capacitors 14 do not engage the inner circumferential wall of the larger diameter sections 22 in the housing 12.
  • the inner ends of the capacitors 14 may lightly engage the inner ends of the respective larger diameter sections 22 but it is preferable to be slightly isolated therefrom.
  • Outer sections 22 and inner sections 23 can be round, square or rectangular depending on the configurations of the capacitors 14 and contacts 15.
  • the contacts 15 extend into the housing 12 via contact sections 15a and extend outside of the shield case 13 via post sections 15b through the center openings of the respective capacitors 14 and soldered thereto.
  • the contacts 15 pass through the smaller diameter sections 23 in such a manner that the outer surfaces of the contacts 15 do not engage the inner surfaces of the smaller diameter sections 23 (see FIG. 3).
  • the contacts 15 are bent downwardly at desired locations outside of the shield case 13 so that they extend through holes 26 in the inductor block 16 positioned between both extended side wall sections 20.
  • the post sections 15b of the contacts 15 are secured in the holes 26 in the inductor block 16 using acrylic adhesive material 27 or the like. Grooves 30 are located in the rear wall 18 of the housing 12.
  • the filter connector 11 of the above construction is mounted on the printed circuit board 32. Electrical connections are made by inserting the post sections 15b of the contacts 15 into holes 31 of the circuit board 32 at appropriate circuit patterns. A housing of a matable complementary electrical connector (not shown in the drawings) is mated with the filter connector 11. In this way, the contact sections 15a of the contacts 15 are electrically connected to corresponding contact sections of receptacle type contacts secured in the complementary connector.
  • the rear walls 18, 19 of the housing 12 and the shield case 13 of the present connector are preferably engaged as shown in FIG. 2 for miniaturization and increasing mechanical strength of the connector 11; however, they may be slightly separated.
  • the inductor block 16 is made of ferrite and in conjunction with the shield case 13 and the capacitors 14, they act as filter devices.
  • the inductor block 16 also acts as an alignment and securing member for the post sections 15b of the contacts 15. It is, therefore, preferable to use the inductor block 16. It is appreciated, however, that the inductor block 16 is not essential to the present device and may be a single or a plurality of separate members.
  • FIGS. 4 and 5 Illustrated in FIGS. 4 and 5 is another embodiment of the present connector.
  • the connector 11 is essentially the same as the first embodiment in basic construction except for the provision of a reinforcement member 32. Therefore, similar reference numerals are used to represent like members or positions.
  • the reinforcement member 32 is made of a metal plate and has holes 33 of a given pitch at the central area thereof and securing members 34a on inwardly-bent spacers 34.
  • the reinforcement member 32 is positioned between a back wall 19 of the shield case 13 and a concave section 35 in a back wall 18 of the housing 12.
  • the securing members 34a extend through slots in the back wall 19 of the shield case 13 and soldered to be firmly mounted on the back wall 19.
  • Front end sections of the capacitors 14 extend through the holes 33 of the reinforcement member 32 and are retained in the holes at the circumferential surfaces of the capacitors 14.
  • the contacts 15 are provided with neck sections 15c between the front end surface of the capacitors 14 and the contact tab sections 15a.
  • the neck sections 15c act to cancel any rocking to the tab sections 15a when inserted in or extracted from receptacle contact sections of a complementary connector.
  • the neck sections 15c as well as retention of the front ends of the capacitors 14 in the holes 33 helps to minimize transmission of rocking which is a major cause of breaking the capacitors 14.
  • the present connector is constructed and operates as discussed above. When it is used under wide temperature changing conditions to cause bending of the contacts due to different coefficients of thermal expansion between the housing and the shield case, the contacts cause no adverse effect such as stress to the housing, and, in turn, to the capacitors. This avoids possible damage to the capacitors including reduced capacitance due to cracks, etc.
  • rocking that may be caused at the contact sections during mating and unmating of the housing with the complementary connector housing is effectively eliminated from the capacitors because of firm retention of the capacitors by the reinforcement member, thereby avoiding the aforementioned trouble due to such rocking.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP90102247A 1989-02-07 1990-02-05 Noise filter connector Expired - Lifetime EP0382148B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP13172/89U 1989-02-07
JP1317289 1989-02-07
JP127460/89U 1989-10-31
JP1989127460U JPH084707Y2 (ja) 1989-02-07 1989-10-31 ノイズフィルタ付き電気コネクタ

Publications (3)

Publication Number Publication Date
EP0382148A2 EP0382148A2 (en) 1990-08-16
EP0382148A3 EP0382148A3 (en) 1990-08-29
EP0382148B1 true EP0382148B1 (en) 1994-05-04

Family

ID=26348926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102247A Expired - Lifetime EP0382148B1 (en) 1989-02-07 1990-02-05 Noise filter connector

Country Status (6)

Country Link
EP (1) EP0382148B1 (enrdf_load_stackoverflow)
JP (1) JPH084707Y2 (enrdf_load_stackoverflow)
KR (1) KR900013680A (enrdf_load_stackoverflow)
BR (1) BR9000465A (enrdf_load_stackoverflow)
DE (1) DE69008558T2 (enrdf_load_stackoverflow)
ES (1) ES2052081T3 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5415569A (en) * 1992-10-19 1995-05-16 Molex Incorporated Filtered electrical connector assembly
US5647768A (en) * 1996-03-11 1997-07-15 General Motors Corporation Plated plastic filter header
SE506824C2 (sv) * 1996-06-14 1998-02-16 Ericsson Telefon Ab L M Anordning för tätt kontaktdon samt sätt att tillverka anordningen
US6314182B1 (en) 1998-08-19 2001-11-06 3M Innovative Properties Company External filter box
SE520443C2 (sv) * 2000-02-14 2003-07-08 Fci Katrineholm Ab Förfarande för montering av kraftdon och kraftdonet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8420222D0 (en) * 1984-08-09 1984-09-12 Oxley Dev Co Ltd Electrical connectors
JPH047588Y2 (enrdf_load_stackoverflow) * 1986-01-09 1992-02-27
GB2205201B (en) * 1987-05-21 1991-01-02 Oxley Dev Co Ltd Stress free integral filter array for multi-way connectors

Also Published As

Publication number Publication date
ES2052081T3 (es) 1994-07-01
JPH037284U (enrdf_load_stackoverflow) 1991-01-24
KR900013680A (ko) 1990-09-06
BR9000465A (pt) 1991-01-15
JPH084707Y2 (ja) 1996-02-07
DE69008558T2 (de) 1994-08-18
DE69008558D1 (de) 1994-06-09
EP0382148A3 (en) 1990-08-29
EP0382148A2 (en) 1990-08-16

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