EP1037316A2 - Elektrische Verbindung und Verfahren zum Herstellen einer solchen Verbindung - Google Patents

Elektrische Verbindung und Verfahren zum Herstellen einer solchen Verbindung Download PDF

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Publication number
EP1037316A2
EP1037316A2 EP99125701A EP99125701A EP1037316A2 EP 1037316 A2 EP1037316 A2 EP 1037316A2 EP 99125701 A EP99125701 A EP 99125701A EP 99125701 A EP99125701 A EP 99125701A EP 1037316 A2 EP1037316 A2 EP 1037316A2
Authority
EP
European Patent Office
Prior art keywords
electrical connection
pcb
housing
contacts
housing parts
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Withdrawn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
EP99125701A
Other languages
English (en)
French (fr)
Other versions
EP1037316A3 (de
Inventor
Winfried Bendig
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of EP1037316A2 publication Critical patent/EP1037316A2/de
Publication of EP1037316A3 publication Critical patent/EP1037316A3/de
Withdrawn legal-status Critical Current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
    • 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
    • H01R12/714—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 with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit

Definitions

  • This invention relates to an electrical connection between contacts of a housing and contacts of a printed circuit board (PCB) arranged within the housing and a method of building such an electrical connection.
  • PCB printed circuit board
  • radio device In a two way radio or a mobile telephone, which are collectively referred to as radio device, in a vehicular cradle it is often needed to direct radio frequency (RF) radiation either to its antenna rod or to an outside cable connected to the cradle.
  • RF radio frequency
  • an impedance conversion is required either to the antenna branch or to the outside cable which in the prior art is provided on a printed circuit board within the device.
  • the present invention arose in an attempt to alleviate these problems.
  • PCB printed circuit board
  • strip conductors of the PCB are formed as contacts.
  • Advantageously strip conductors of the PCB form concentric ring contacts. This allows cramping the PCB between housing parts by screwing together these housing parts.
  • Advantageously contacts are gold plated.
  • the PCB has a circular periphery. This allows a small PCB and a suited small housing.
  • the PCB contains a filter or an impedance transforming circuit. This allows to place a filter within a coax cable.
  • An impedance transforming circuit allows an electrical connection between RF conductors of different wave resistance.
  • the contacts of the housing are rings of metal.
  • Such rings are mechanically strong and easy to manufacture and to mount due to the axial symmetry.
  • the contacts of the housing are partly embedded in plastic, this allows to build one-piece housing parts having contacts by casting plastic.
  • the housing comprises outside circular contacts.
  • an axially symmetric antenna adapter can be screwed between a radio and an antenna and has not to be azimuthally positioned to a branching direction.
  • the invention allows to provide a vehicular cradle for a radio or a mobile telephone, wherein, when the radio is inserted, a switch within an antenna adapter is actuated and an electrical connection of the radio or mobile telephone is switched from its antenna to the vehicular cradle.
  • a method of building an electrical connection between contacts of a housing and contacts of a printed circuit board (PCB) comprising the steps
  • the method of building an electrical connection comprises the additional step
  • FIG. 1 shows an antenna coupler comprising an electrical connection in accordance with the invention.
  • Figure 2 shows a PCB for the electrical connection in accordance with the invention in top view.
  • Figure 3 shows the antenna coupler comprising the electrical connection in accordance with the invention used to couple a radio device to a roof mounted antenna or to an antenna mounted on the radio device; and a part of a radio cradle in cross-section.
  • antenna coupler 10 comprises first housing part 12, second housing part 14, and PCB 16, PCB 16 is cramped between housing parts 12 and 14.
  • First housing part 12 comprises inner metal ring 22, first plastic housing 24, and first outer metal ring 26.
  • First plastic housing 24 is plastic moulded through holes 28 in first outer metal ring 26 and isolates it from inner metal ring 22.
  • Inner metal ring 22 is connected to first plastic housing 24 by threads 30 which connection is fixed by glue.
  • Inner metal ring 22 comprises first housing thread 31 for screw connecting first housing part 12 with an antenna (not shown).
  • Inner metal ring 22 has gold plated first contact surface 32 and first outer metal ring 26 has gold plated second contact surface 33 and gold plated third contact surface 35.
  • Second housing part 14 comprises metal body 34 and second plastic housing 36 which is plastic moulded through holes 38 in metal body 34 such that it has outer plastic portion 40 and inner plastic portion 42.
  • Metal body 34 comprises second housing thread 44 for screw connecting second housing part 14 with a radio (not shown).
  • Metal body 34 comprises gold plated fourth contact surface 46 and second outer metal ring 47 gold having plated fifth contact surface 48.
  • first housing thread 31 and second housing thread 44 are matching such that an antenna (not shown) with matching thread can be screwed into either antenna coupler 10 or the radio (not shown).
  • PCB 16 comprises components 50 and reed switch 52.
  • PCB 16 comprises board 54 in form of a disk with has a circular periphery.
  • Board 54 has circular strip conductors on both sides in contact with contacts 32, 33, and 46.
  • First housing part 12 and second housing part 14 are screw-connected by threads 55 which connection is fixed by glue.
  • Reed switch wire 57 extends through tube section 56 of inner plastic portion 42 and through metal tube 58 of second housing part 14.
  • Metal body 34 comprises flank 59 formed outwardly suitable to activate an external switch (not shown) within a radio, which switch is activated only if antenna coupler 10 but not an antenna is screw-connected to the radio.
  • Reed switch wire 57 is soldered to metal tube 58 at its free end 60.
  • Metal tube 58 preferably comprises gold plated outer cylinder wall 61.
  • a method of building an electrical connection between contacts of a housing and contacts of PCB 16 comprising the steps
  • First housing part 12, second housing part 14 and PCB 16 including reed switch 52 are pre-manufactured independently; arranged; housing parts 12 and 14 are put together by screwing until PCB 16 is cramped between them; metal tube 58 is shifted over reed switch wire 57 and squeezed to inner plastic portion 42; reed switch wire 57 is soldered to metal tube 58 at its free end 60.
  • the method of building an electrical connection comprises the additional step
  • inner metal ring 22 is premounted to first housing part 12.
  • metal ring 22 is mounted after first housing part 12 has been mounted to second housing part 14 with PCB 16 inbetween. Then, inner metal ring 22 is mounted as an auxiliary housing part 22 to the two housing parts already put together such that an auxiliary contact 64 of PCB 16 touches a respective contact 32 of the auxiliary housing part 22.
  • the method of building an electrical connection comprises the additional step
  • the fixing of housing parts to each other is performed by glueing.
  • glue is applied to threads 30 and threads 55 before the respective parts are screwed together and the glue cures afterwards such that the respective parts are fixed.
  • Figure 2 shows circular PCB 16 of Fig. 1 for the electrical connection comprising circular strip conductors.
  • Fig. 2 a) shows the side of PCB 16 facing first housing part 12, the side comprising first strip conductor 62, second strip conductor 64 and ducts 66, 68, 70
  • Fig. 2b) shows the side of PCB 16 facing second housing part 14, the side comprising third strip conductor 72, components 50 and ducts 66, 68, 70.
  • Reed switch 52 of Fig. 1 is not shown for simplicity but is to be connected to ducts 68 and 70.
  • Conductor strips 62, 64 and 72 can contact 33,35,46.
  • FIG. 3 shows antenna coupler 10 comprising the electrical connection in accordance with the invention used to couple radio device 80 to roof mounted antenna 82 or to antenna 84 mounted on radio device 80.
  • Radio device 80 is shown located in cradle 86 which is fixed to a dashboard of motor vehicle 88 having a roof mounted antenna 82. It will be referred to details of antenna coupler 10 shown in Fig. 1.
  • Radio device 80 is a two way radio which (when not placed in the cradle 86) is usable as a handheld portable radio.
  • Antenna 84 is a conventional portable radio antenna which is helically wound. It terminates at its lower end with a conventional male screw-threaded connector comprising first housing thread 31.
  • Cradle 86 comprises a box-like structure having formed in its front face recess 90.
  • Recess 90 is shaped to receive radio device 80 and includes electrical contacts to enable the required type of connection to circuitry in a carrier.
  • the circuitry includes battery charging circuits for charging a battery of the radio device 80 and for connection to a loudspeaker and microphone (not shown) mounted in vehicle 88.
  • Recess 90 also includes a locking mechanism to retain the radio device 1 in the recess. This mechanism is operated by means of an external locking lever 92 to lock the radio device 80 into recess 90 or to subsequently release it.
  • Antenna 84 can be directly screw-connected to radio device 80 or via antenna coupler 10 therebetween as shown in Fig. 3. In case of direct connection the abovementioned switch within the radio is inactivated such that antenna 84 is electrically connected to radio device 80 via the screw-connection.
  • antenna 84 is conditionally electrically connected to radio device 80 via metal tube 58 and reed switch 52 if radio device 80 is not positioned in cradle 86.
  • radio device 80 is positioned in cradle 86 then reed switch 52 is activated by magnets (not shown) within cradle 86. Then, antenna 82 is electrically connected to radio device 80 via metal tube 58, reed switch 52 and first outer metal ring 26. First outer metal ring 26 is contacted at third contact surface 35 by first prong 94 of cradle 86 and guides the signal to an antenna cable (not shown) to antenna 82. A ground connection is established between radio device 80 and the antenna cable via the screw-connection of metal body 34 which is contacted at fifth contact surface 48 by second prong 96 of cradle 86.
  • two prongs are provided one on third contact surface 35 and one on fifth contact surface 48 in alternative embodiments more than one prong per contact surface may be used. This may reduce the contact resistance.
  • the coupler may also be used to couple the radio to test equipment by placing the radio into a cradle in which the prongs are connected to the test equipment rather than a further antenna.
  • the radio and the coupler will typically be part of a communication system which will include a number of other units mobile and portable.

Landscapes

  • Support Of Aerials (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP99125701A 1999-03-17 1999-12-23 Elektrische Verbindung und Verfahren zum Herstellen einer solchen Verbindung Withdrawn EP1037316A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9906003 1999-03-17
GB9906003A GB2348055A (en) 1999-03-17 1999-03-17 Cramped pcb interconnection

Publications (2)

Publication Number Publication Date
EP1037316A2 true EP1037316A2 (de) 2000-09-20
EP1037316A3 EP1037316A3 (de) 2002-02-06

Family

ID=10849699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125701A Withdrawn EP1037316A3 (de) 1999-03-17 1999-12-23 Elektrische Verbindung und Verfahren zum Herstellen einer solchen Verbindung

Country Status (2)

Country Link
EP (1) EP1037316A3 (de)
GB (1) GB2348055A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122714A1 (de) * 2016-11-24 2018-05-24 Endress + Hauser Wetzer Gmbh + Co Kg Kommunikations-Adapter für einen Transmitter eines Feldgeräts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326158A (en) * 1928-09-05 1930-03-05 Frederic Charles Tucker Improvements in or relating to couplings for flexible electric cords or cables
EP0697771A1 (de) * 1994-07-16 1996-02-21 Robert Bosch Gmbh Adapter für ein Funkgerät und Halteklammer dazu
DE29721015U1 (de) * 1997-11-27 1998-01-15 Jaguar Stahlwarenfabrik GmbH & Co. KG, 42653 Solingen Ladestation für aufladbare elektrische Handgeräte

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5609496A (en) * 1994-11-15 1997-03-11 Micropolis Pte Ltd. Air-tight connector assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB326158A (en) * 1928-09-05 1930-03-05 Frederic Charles Tucker Improvements in or relating to couplings for flexible electric cords or cables
EP0697771A1 (de) * 1994-07-16 1996-02-21 Robert Bosch Gmbh Adapter für ein Funkgerät und Halteklammer dazu
DE29721015U1 (de) * 1997-11-27 1998-01-15 Jaguar Stahlwarenfabrik GmbH & Co. KG, 42653 Solingen Ladestation für aufladbare elektrische Handgeräte

Also Published As

Publication number Publication date
EP1037316A3 (de) 2002-02-06
GB9906003D0 (en) 1999-05-12
GB2348055A (en) 2000-09-20

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