EP0692848A1 - Connecteur a filtre - Google Patents

Connecteur a filtre Download PDF

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Publication number
EP0692848A1
EP0692848A1 EP95906548A EP95906548A EP0692848A1 EP 0692848 A1 EP0692848 A1 EP 0692848A1 EP 95906548 A EP95906548 A EP 95906548A EP 95906548 A EP95906548 A EP 95906548A EP 0692848 A1 EP0692848 A1 EP 0692848A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter unit
shield frame
electrical connector
leaf spring
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.)
Withdrawn
Application number
EP95906548A
Other languages
German (de)
English (en)
Other versions
EP0692848A4 (fr
Inventor
Hisayoshi Shimasaki
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.)
Nippon Carbide Industries Co Inc
Original Assignee
Nippon Carbide Industries Co Inc
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
Priority claimed from JP6030804A external-priority patent/JPH07220820A/ja
Priority claimed from JP6066504A external-priority patent/JPH07249459A/ja
Application filed by Nippon Carbide Industries Co Inc filed Critical Nippon Carbide Industries Co Inc
Publication of EP0692848A1 publication Critical patent/EP0692848A1/fr
Publication of EP0692848A4 publication Critical patent/EP0692848A4/fr
Withdrawn legal-status Critical Current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
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7195—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with planar filters with openings for contacts
    • 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
    • H01R13/7193—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with ferrite 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • H01R13/6583—Shield structure with resilient means for engaging mating connector with separate conductive resilient members between mating shield members

Definitions

  • This invention relates to an electrical connector equipped with a filter.
  • the above prior art proposes to provide a structure in which a shield frame and a filter unit are electrically connected by means of solder and mechanically held.
  • the shield frame and the filter unit are electrically connected and mechanically held by means of solder.
  • the cost required for soldering is comparatively high.
  • the filter unit is susceptible to crack by heat generated during soldering. Also, there is a possibility that solder leach occurs. Moreover, residue of flux used during soldering adversely affects component members of the electrical connector with a filter with the passage of time. Furthermore, since the soldered parts are rigid, they are not resistant to expansion and shrinkage due to temperature cycle.
  • the present invention has achieved the above object by providing an electrical connector with a filter comprising a shield frame, a filter unit having holes, contact elements to be inserted respectively into the holes, and a leaf spring interposed between the shield frame and the filter unit, the filter unit having a filter function corresponding to the holes, and a ground electrode; the ground electrode and the shield frame being electrically connected by the leaf spring; and the filter unit and the shield frame being mechanically secured and held by the leaf spring (hereinafter referred to as the "first invention").
  • the present invention has achieved the above object by providing an electrical connector with a filter comprising a shield frame, a filter unit having holes, contact elements to be inserted respectively into the holes and each having a stopper, a fixture for allowing the contact elements to be inserted, a leaf spring interposed between the shield frame and the filter unit, and a body, the filter unit having a filter function corresponding to the holes and a ground electrode; the ground electrode and the shield frame being electrically connected by the leaf spring; the filter unit and the shield frame being mechanically secured and held by the leaf spring; and the contact elements being pressed against the filter unit by the fixture through the stoppers (hereinafter referred to as the "second invention").
  • the terms "the present invention” as used herein includes both the first and the second inventions.
  • the electrical connector with a filter of the present invention can be preferably used for electronic devices, electronic equipment, etc.
  • it can be desirably used for communication equipments, electronic devices for automobiles, peripheral equipments of computers, vending machines, ticket vending machines, various electronic game devices including "Pachinko" (Japanese pinball) machines and amusement game machines.
  • Fig. 1 is an exploded perspective view showing a preferred embodiment of the electrical connector with a filter according to the first invention
  • Fig. 2 is a sectional view taken on line J-J' of Fig. 1 and viewed in a direction as indicated by arrows
  • Fig. 3 is a sectional view showing another embodiment of a filter unit.
  • the electrical connector with a filter comprises a shield frame 32, a filter unit 20 having holes 21, contact elements 33 to be inserted respectively into the holes 21, and a leaf spring 31 interposed between the shield frame 32 and the filter unit 20.
  • the shield frame 32, the leaf spring 31 and the filter unit 20 are firmly secured by a set pin 35.
  • a body 34 may be preferably secured firmly with these members in such a manner that the body 34 accommodates the filter unit.
  • the leaf spring 31 is so contoured as to contact a ground electrode 14 formed on the filter unit 20 and the shield frame 32, thereby electrically connecting the ground electrode 14 with the shield frame 32. Further, the leaf spring 31 mechanically secures and holds the filter unit 20 and the shield frame 32 (and, the body 34, if necessary).
  • the filter unit 20 has a single or a plurality of holes 21 formed in an alumina substrate 11 so that the contact elements 33 can be inserted therein respectively.
  • the filter unit 20 further has a filter function corresponding to the holes 21 and the ground electrode.
  • filter function corresponding to the holes refers to a filter function associated with the respective contact elements 33 inserted into the holes.
  • the filter function 10 is formed on the periphery of each of the holes 21, but it should be noted that the filter function 10 is not necessary to be formed on the periphery of all the holes 21. Also, the filter function 10 is not necessary to be formed in the periphery of the hole 21. Alternatively, it may be formed, for example, in an area adjacent to the hole 21.
  • the number of holes 21 provided is generally equal to that of the contact elements 33 provided.
  • the filter function 10 preferably comprises a conductor, a dielectric substance and/or a ferrite. Further, where a high electrostatic capacity is required, it is preferred that a multi-layer printed ceramic condenser is used as the filter function 10. Where the filter function 10 is composed of a conductor and a dielectric substance, the filter function 10 comprises, as shown in Fig. 2, a lower electrode 12, an upper electrode 14, a dielectric layer 13 interposed between the lower electrode 12 and the upper electrode 14, and a protective glass layer 15 covering the upper electrode 14 and the dielectric layer 13. In the filter unit 20 shown in Fig. 2, the upper electrode 14 also serves as the ground electrode.
  • the filter function 10 shown in Fig. 3 comprises a conductor, a dielectric substance and a ferrite. That is, in the filter function 10 shown in Fig. 3, the ferrite 56 is provided on the periphery of the hole 21, the lower electrode 12 is provided in such a manner as to surround the ferrite 56, and there are further provided the upper electrode 14, the dielectric layer 13 interposed between the lower electrode 12 and the upper electrode 14, and the protective glass layer 15 covering the upper electrode 14 and the dielectric layer 13. In the filter unit shown in Fig. 3, the upper electrode 14 also serves as the ground electrode.
  • the filter unit 20 is not limited to the above-mentioned embodiments, and the filter unit 20 can be appropriately varied in material, contour, construction, method of manufacture, etc.
  • the filter unit 20 is preferably manufactured by means of printing technique and particularly preferably manufactured by thick-film printing technique.
  • the filter function 10 is not limited to the embodiment in which it is provided only at a single surface of the alumina substrate 11. Alternatively, it may be provided at both surfaces of the alumina substrate 11 or it may be alternately provided at the upper and the lower surfaces thereof.
  • the upper electrode 14 may be used as the ground electrode and the lower electrode 12 may be electrically connected to the contact element 33.
  • the lower electrode 12 may be used as the ground electrode and the upper electrode 14 may be electrically connected to the contact element 33.
  • the upper electrode 14 may be used as the ground electrode and the lower electrode 12 may be electrically connected to the contact elements 33, and in another filter function, the lower electrode 12 may be used as the ground electrode and the upper electrode 14 may be electrically connected to the contact elements 33.
  • the leaf spring 31 may be of a material and/or construction having spring properties or elastic properties and electrically conductive properties.
  • a plate, a spring, a wire, a rubber, a resin, or the like may be used as the leaf spring 31.
  • the alumina substrate 11 is not particularly limited as a substrate, and other materials may be used as far as they have electrical insulation properties.
  • the dielectric substance is not particularly limited. It is preferred that the dielectric substance is of a lead perovskite structure, and particularly preferred that the dielectric substance comprises at least one compound selected from the group consisting of Pb(Mg 1/3 Nb 2/3 )O3, Pb(Zn 1/3 Nb 2/3 )O3, PbTiO3 and Bi2O3.
  • the contact elements 33 are inserted respectively into the holes 21 formed in the filter unit 20 and secured by the fixing means.
  • the fixing means is not particularly limited.
  • the contact elements 33 may be secured by soldering from a single or both surfaces of the filter unit 20.
  • a crack may not occur if the filter unit 20 is pre-heated prior to soldering. After soldering, if ultrasonic cleaning is effected, no residue of flux may be remained and no adverse effect caused by a change with time may occur.
  • the leaf spring 31 is held between the shield frame 32 and the filter unit 20.
  • the ground electrode 14 of the filter unit 20 and the shield frame 32 can be electrically connected to each other, and the filter unit 20 and the shield frame 32 can be mechanically held without soldering.
  • the number of the leaf spring 31 is not limited to one and a plurality of leaf springs may be employed in accordance with necessity.
  • the electrical connector with a filter 30 thus assembled has advantages that no cracks occur which would otherwise occur due to heat produced during soldering, that no solder leach occurs, and that no residue of flux for soldering is remained since the shield frame 32 and the filter unit 20 are not soldered. Further, the connector 30 is resistant to temperature cycle.
  • the order of assembling the contact elements 33, the filter unit 20, the body 34, the shield frame 32, the leaf spring 31 and set pins 35 are varied according to the contour of the connector, and therefore not particularly limited.
  • Fig. 4 is a perspective view showing a preferred embodiment of the electrical connector with a filter according to the second invention
  • Fig. 5 is an exploded perspective view of the electrical connector with a filter shown in Fig. 4
  • Fig. 6 is an exploded perspective view showing another preferred embodiment of the electrical connector with a filter according to the second invention
  • Fig. 7 is a sectional view taken along line K-K' of Fig. 6 and viewed in a direction as indicated by arrows
  • Figs. 8(A) to 8(C) are perspective views showing various contact elements with a stopper.
  • the electrical connector with a filter comprises a shield frame 32, a filter unit 20 having holes 21, contact elements 33 to be inserted respectively into the holes 21 and each having a stopper 62, a fixture 42 for allowing the contact elements 33 to be inserted, a leaf spring 31 interposed between the shield frame 32 and the filter unit 20, and a body 34.
  • the shield frame 32, the leaf spring 31, the filter unit 20, the contact elements 33, the fixture 42, and the body 34 are assembled together and secured to one another by set pins 35.
  • the leaf spring 31 is so contoured as to contact with the ground electrode 14 of the filter unit 20 and the shield frame 32, thereby electrically connecting the ground electrode 14 with the shield frame 32.
  • the leaf spring 31 is interposed between the filter unit 20 and the shield frame 32 so as to mechanically secure and hold the filter unit 20, the shield frame 32 and the body 34.
  • the contact elements 33 are inserted into the respective holes 21 from the bottom surface of the filter unit 20.
  • the contact elements 33 are inserted into the fixture 42 from the lower portion of the contact element 33, and then the fixture 42 is interposed between the filter unit 20 and the body 34.
  • the body 34 preferably accommodates the filter unit 20.
  • the contact elements 33 are pressed against and secured to the filter unit by the fixture 42 through the stoppers 62.
  • the filter unit 20 As for the filter unit 20, the filter function 10 and the ground electrode 14, the detailed description made with respect to the first invention is also appropriately applied to the second invention.
  • the shield frame 32, the leaf spring 31, the filter unit 20, the contact elements 33, the fixture 42, and the body 34 are assembled together in this order and secured to one another by the set pins 35.
  • This order of assembly enables the electrical connector with a filter to be manufactured with no soldering step. It should be noted, however, that the order of assembly is not particularly limited because the order is varied according to the contour of the connector.
  • the fixture 42 mechanically holds the contact elements 33. Also, in particular, where the filter function 10 comprises a conductor and a dielectric substance, the fixture 42 electrically connects the electrode composed of the conductor to the contact element 33.
  • the fixture 42 is not particularly limited in material, contour, etc.
  • the fixture is preferably a washer, a spring or a rubber. In Figs. 4 and 5, a rubber is used as the fixture 42, whereas in Figs. 6 and 7, a washer is used as the fixture 42.
  • each contact element 33 is not particularly limited in contour. It may take any contour as far as it can press the contact element 33 against the filter unit 20 in cooperation with the fixture 42.
  • contact elements as shown in Figs. 8(A) to 8(C) are preferably used.
  • an Ag-Pd conductive paste was screen-printed on both surfaces of the alumina substrate 11 having the holes 21 and on the inner wall surfaces of the holes 21 in a pattern as serving as individual electrodes of the filter function 10 and dried, followed by firing for ten minutes at 850 °C to form the lower electrodes 12, 12'.
  • a dielectric paste predominantly comprises Pb(Mg 1/3 Nb 2/3 )O3 and Pb(Zn 1/3 Nb 2/3 )O3 was screen-printed in such a manner as to have an overlaid portion on the lower electrode 12, and dried.
  • the dielectric paste may be screen-printed once or a plurality of times.
  • the screen-printing and drying were carried out three times, followed by firing for ten minutes at a peak temperature of 900 °C to form the dielectric layer 13.
  • an Ag-Pd conductive paste was screen-printed in such a manner as to overlay on the dielectric layer and not to contact directly the lower electrode 12 and dried, followed by firing for ten minutes at 900 °C to form the upper electrode 14.
  • an over-coating glass paste was screen-printed on the area of the lower electrode exposed to the surface and the area other than longitudinal opposite end portions of the upper electrode and dried, followed by firing for ten minutes at 530 °C to form the protective glass layer 15. In this manner, the filter unit 20 was made.
  • the contact elements were inserted respectively into the holes 21 of the filter unit 20 and pre-heated to about 180 °C. Thereafter, the contact elements 33 were soldered and secured to the filter unit 20 from both surfaces thereof by the solder 22 and electrically connected to the lower electrodes 12, 12'. Then, the flux was removed by means of ultrasonic cleaning.
  • the leaf spring 31 was inserted between the filter unit 20 having the contact elements 33 secured thereto and the shield frame 32, and secured to one another by the set pins 35 together with the body 34.
  • the electrical connector with a filter 30 was made.
  • the leaf spring 31 electrically connects the upper electrode 14 to the shield frame 32, and as a result the upper electrode 14 served as an ground electrode and functioned to enhance the electromagnetic shielding effect together with the shield frame 32. That is, the electrical connector with a filter of this Example exhibits a high noise attenuation effect.
  • the contact elements 33 are soldered at both surfaces of the filter unit 20, securing strength is very strong and reliability is high.
  • a ferrite paste was screen printed on the inner wall surface of each hole 21 of the alumina substrate 11 having the holes 21 and dried, followed by firing for ten minutes at 900 °C to form the ferrite layer 56.
  • an Ag-Pd conductive paste was screen-printed on a single surface of the alumina substrate 11 and dried, followed by firing for ten minutes at 850 °C to form the lower electrode 12.
  • the dielectric layer 13, the upper electrode 14 and the protective glass layer 15 were formed in the substantially same manner as in Example 1. In this manner, the filter unit 20 was made.
  • the contact elements 33 were inserted respectively into the holes 21 of the filter unit 20 and pre-heated to about 180 °C. Thereafter, the contact elements 33 were secured to the filter unit 20 by soldering from one side surface thereof, and electrically connected to the lower electrode 12. Then, the flux was removed by ultrasonic cleaning.
  • the leaf spring 31 was inserted between the filter unit 20 and the shield frame 32 in the substantially same manner as in the Example 1 and secured to one another by the set pins 35 together with the body 34.
  • the electrical connector with a filter 30 was made.
  • the leaf spring 31 electrically connects the upper electrode 14 to the shield frame 32, and as a result the upper electrode 14 served as a ground electrode and functioned to enhance the electromagnetic shielding effect together with the shield frame 32. That is, the electrical connector with a filter of this Example exhibits a high noise attenuation effect.
  • the filter unit 20 having the filter function 10 and the ground electrode was made in accordance with the substantially same manner as in the Example 1.
  • the contact elements 33 each having a stopper 62 were inserted respectively into the holes 21 from the bottom surface of the filter unit 20 (from the side where the filter function is not formed) and the rubber 42, which serves as a fixture, having contact element insertion holes was provided on the bottom surface of the filter unit 10 in such a manner that the contact elements 33 penetrate the insertion holes of the rubber 42.
  • the shield frame 32, the leaf spring 31, the filter unit 20 and the body 34 were assembled in this order and secured to one another by the set pins 35. In this manner, the electrical connector with a filter without any application of solder was made.
  • the electrical connector with a filter thus manufactured, the upper electrode 14 of the filter function 10 functioning as a ground electrode and the shield frame 32 are electrically connected by the leaf spring 31. Also, the contact elements 33 pressed against the filter unit 20 by the rubber 42 through the stoppers 62 are electrically connected to the lower electrode of the filter function 10. As a result, the electrical connector with a filter of this embodiment exhibits a high electromagnetic shielding effect and a high noise attenuation effect. Moreover, since the connector is manufactured by a simplified assembling process comprising no soldering steps, the connector has advantages that no cracks occurs, no residue of flux remains, and the connector is resistant to temperature cycle and has a high reliability.
  • the filter unit 20 having the filter function 10 and the ground electrode was made in accordance with the substantially same manner as in the Example 1.
  • the contact elements 33 each having a stopper 62 were inserted respectively into the holes 21 from the bottom surface of the filter unit 20 (from the side where the filter function is not formed) and the washers 42 serving as fixtures were provided on the bottom surface of the filter unit 20 in such a manner that the contact elements 33 penetrate the washers 42.
  • the shield frame 32, the leaf spring 31, the filter unit 20 and the body 34 were assembled in this order and secured to one another by the set pins 35. In this manner, the electrical connector with a filter without any application of solder was made.
  • the electrical connector with a filter thus manufactured, the upper electrode 14 of the filter function 10 functioning as a ground electrode and the shield frame 32 are electrically connected by the leaf spring 31. Also, the contact elements 33 pressed against the filter unit 20 by the washers 42 through the stoppers 62 are electrically connected to the lower electrode of the filter function 10. As a result, the electrical connector with a filter of this Example exhibits a high electromagnetic shielding effect and a high noise attenuation effect. Moreover, since the connector of this Example is manufactured in a simplified assembling process comprising no soldering step, the connector has advantages that no cracks occurs, no residue of flux remains, and the connector is resistant to temperature cycle and has high reliability.
  • the electrical connector with a filter according to the present invention not only exhibits a high electromagnetic shielding effect but also a high attenuation effect for attenuating unnecessary frequencies of the electromagnetic signal. Moreover, since the filter unit and the shield frame are not secured by soldering, cracks may not occur. Moreover, the connector is resistant to temperature cycle and has high reliability. Particularly, in the electrical connector with a filter according to the first invention, electrical connection and mechanical holding can be realized simply by assembling the shield frame, the leaf spring and the filter unit (and the body, where necessary) and secured by set pins. Thus, the process can be simplified. In the electrical connector with a filter according to the second invention, since the assembling process comprises no soldering step, the press can be more simplified, and no cracks occurs and no residue of flux remains. Moreover, the connector becomes more resistant to temperature cycle and has a higher reliability.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
EP95906548A 1994-02-03 1995-01-31 Connecteur a filtre Withdrawn EP0692848A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP30804/94 1994-02-03
JP6030804A JPH07220820A (ja) 1994-02-03 1994-02-03 フィルタ付電気コネクタ
JP6066504A JPH07249459A (ja) 1994-03-11 1994-03-11 フィルタ付電気コネクタ
JP66504/94 1994-03-11
PCT/JP1995/000125 WO1995021475A1 (fr) 1994-02-03 1995-01-31 Connecteur a filtre

Publications (2)

Publication Number Publication Date
EP0692848A1 true EP0692848A1 (fr) 1996-01-17
EP0692848A4 EP0692848A4 (fr) 1997-07-23

Family

ID=26369216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95906548A Withdrawn EP0692848A4 (fr) 1994-02-03 1995-01-31 Connecteur a filtre

Country Status (5)

Country Link
EP (1) EP0692848A4 (fr)
KR (1) KR960702197A (fr)
CN (1) CN1123065A (fr)
CA (1) CA2159357A1 (fr)
WO (1) WO1995021475A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1086060C (zh) * 1997-08-12 2002-06-05 鸿海精密工业股份有限公司 滤波连接器
CN114094403B (zh) * 2019-08-09 2024-06-14 华为数字能源技术有限公司 滤波连接装置及滤波方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819052A (en) * 1986-12-22 1989-04-04 Texas Instruments Incorporated Merged bipolar/CMOS technology using electrically active trench
JP2615977B2 (ja) * 1989-02-23 1997-06-04 松下電器産業株式会社 誘電体磁器組成物およびこれを用いた積層セラミックコンデンサとその製造方法
JPH04129185A (ja) * 1990-09-20 1992-04-30 Yazaki Corp ノイズ防止コネクタ
DE9107385U1 (de) * 1991-06-14 1992-07-16 Filtec Filtertechnologie für die Elektronikindustrie GmbH, 59557 Lippstadt Mehrpoliger Steckverbinder für elektronische Signalleitungen

Also Published As

Publication number Publication date
WO1995021475A1 (fr) 1995-08-10
CA2159357A1 (fr) 1995-08-10
CN1123065A (zh) 1996-05-22
KR960702197A (ko) 1996-03-28
EP0692848A4 (fr) 1997-07-23

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