EP0036587B1 - Kontaktklammer - Google Patents

Kontaktklammer Download PDF

Info

Publication number
EP0036587B1
EP0036587B1 EP81101887A EP81101887A EP0036587B1 EP 0036587 B1 EP0036587 B1 EP 0036587B1 EP 81101887 A EP81101887 A EP 81101887A EP 81101887 A EP81101887 A EP 81101887A EP 0036587 B1 EP0036587 B1 EP 0036587B1
Authority
EP
European Patent Office
Prior art keywords
clamping
components
clamping components
spring
chambers
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
Application number
EP81101887A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0036587A2 (de
EP0036587A3 (en
Inventor
Arthur Wondra
Alfred Ulrich
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0036587A2 publication Critical patent/EP0036587A2/de
Publication of EP0036587A3 publication Critical patent/EP0036587A3/de
Application granted granted Critical
Publication of EP0036587B1 publication Critical patent/EP0036587B1/de
Expired 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
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22—End pieces terminating in a spring clip
    • H01R11/24—End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip

Definitions

  • the invention relates to a contact clip for connecting an electrical conductor to a contact part, in particular an electrode, with two clamping parts pivotably mounted about an axis in relation to one another, between which a spring engages which compresses the front ends of the clamping parts which serve to clamp the contact part , as long as the rear ends of the clamping parts on the other side of the axis are not pressed together by hand to open the clamping connection, with clamping jaws at the front ends of the clamping parts, which clamping jaws are in contact with force when clamped, with an electrical connection inside one of the clamping parts, which electrically connects the electrical conductor with the associated clamping jaws, each with a box-shaped, one-sided open cavity in the rear ends of the clamping parts, which cavities are designed and spatially arranged so that they are at Schwenkbe Movements of the clamping parts interlock movably, with one cavity protruding with its opening in each clamping part position into the opening of the other cavity, so that in each clamping part position between the
  • DE-U-7 410 155 contact clips with two types of spring pressure are previously known.
  • the pivot pin which connects the two clamping parts, is surrounded by a spiral spring which presses the two clamping parts against one another with their clamping ends.
  • the coil spring is quite stable; however, their use brings with it problems of cleaning, so that application for medical purposes is hardly possible.
  • the subject of DE-U-7 410 155 includes the second type of spring pressure.
  • This object contains a spring which is designed as a ring sector. Such a spring poses no problems in terms of cleaning. However, the advantage gained in this way is paid for by the increased risk of the spring breaking at the attachment points of the ring sector.
  • a contact clip of the type mentioned is known. It is a clamp with which the connecting wires of a geophone can be detachably connected to a cable.
  • the contact clip comprises two relatively long, mutually pivotable clamping parts in the form of a clothespin.
  • the plastic clamping parts each have a box-shaped cavity in which a compression spring is arranged.
  • the electrical contact parts are metal tongues wrapped in wire, which are arranged on the mutually facing surfaces of the clamping parts and are each provided with a protrusion at their end.
  • a disadvantage of the known contact clip is that a reliable electrical contact to the contact part (connecting wire of the geophone) is not necessarily guaranteed, because the contact pressure is distributed linearly on the contact part in the area of the protrusions or the metal tongues wrapped by wire.
  • the connection to an electrode (round cross-section) for the acceptance of electrical physiological signals should lead to contact difficulties.
  • the use of wire-wrapped metal tongues, which are oriented essentially parallel to one another in the closed position of the contact clip complicates and complicates the manufacture of the clamping parts and thus the contact clip.
  • the object of the present invention is to attach a contact clip of the type mentioned at the outset, in which the clamping parts can be produced in a simple manner from plastic and which is particularly suitable for taking physiological signals from an electrode.
  • clamping parts are made together with the cavities as injection molded parts made of plastic and that the injection molded parts at the front ends carry partially overmolded clamping plates, which are arranged on the sides of the clamping parts and are formed with notches as the said clamping jaws .
  • the contact clamps according to the invention ensure contamination-free inclusion of the spreading spring. So there are no cleaning problems with regard to the spring, so that it can have any break-proof shape (spiral, screw, leaf shape or the like). The service life of the contact clip is therefore relatively long.
  • a contact clip consists of two clamping parts 1 and 2, which have an axis 3 pivotably mounted in opposite directions to one another.
  • Each clamping part 1, 2 has a metal clamping plate 4 or 5 on its head in a lateral position, which is formed on the base side to form clamping jaws 6 or 7 with notches 8 or 9.
  • the manually compressible counter ends 10 and 11 of the clamping parts 1 and 2 are provided with depressions or pressure points 12 and 13 against which the user's fingers can be pressed.
  • the end 10 of the upper clamping part 1 is used at the same time for connecting an electrical cable 14.
  • the connection is provided by means of an anti-kink sleeve 15.
  • the electrical conductor 16 of the line cable 14 is connected in the interior of the upper clamping part 1 via a clamp or solder connection 17 to the input of a high-frequency choke 18 or an electrical resistor.
  • the output of the choke 18 or of the resistor is electrically conductively connected to the clamping plate 4 via a further line section of the conductor 16. This results in an electrical connection between the clamping plate 4 and the conductor of the cable 14 via the choke 18 or the resistor.
  • Each manually operated end 10 and 11 of the clamping parts 1 and 2 has a cavity 19 and 21 in the area of the pressure points 12 and 13, respectively.
  • Both cavities 19 and 21 are formed by boxes which are open on one side and whose openings 20 and 22 face each other are directed.
  • the upper box (cavity 19) projects with its opening 20 under the opening 22 of the lower box (cavity 21).
  • a spring or compression spring 23 is inserted into the interior which is protected against the ingress of protection or the like.
  • this spring 23 is designed as a helical spring, which rests with one end on the bottom of the cavity 19 and with its other end on the bottom of the cavity 21 for the purpose of exerting pressure on both floors. Because of this constant pressure, the clamping jaws 6 and 7 are pressed together at the clamping ends of the clamping parts 1 and 2 to the position shown. If the contact clip or pliers are to be opened, pressure is exerted on the pressure points 12 and 13 by the fingers of the hand. The jaws 6 and 7 then open against the pressure of the spring 23.
  • the contact clip thus establishes a connection between the electrical conductor 14 and, for example, an electrode. It works with an unbreakable spring 23, which is protected against dirt and sits in a cavity inside the contact clip.
  • the clamping parts 1 and 2 are injection molded parts made of plastic.
  • the connections 15 and 17 for the electrical cable 14 including the choke 18 or the resistor are therefore completely encapsulated by plastic.
  • the sheets 4 and 5 are arranged on the outside of the clamping parts 1 and 2, respectively. Except for the released clamping jaws 6 and 7, they can also be encapsulated with plastic on all sides.

Landscapes

  • Clamps And Clips (AREA)
  • Measuring Leads Or Probes (AREA)
EP81101887A 1980-03-21 1981-03-13 Kontaktklammer Expired EP0036587B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3011066 1980-03-21
DE19803011066 DE3011066A1 (de) 1980-03-21 1980-03-21 Kontaktklammer

Publications (3)

Publication Number Publication Date
EP0036587A2 EP0036587A2 (de) 1981-09-30
EP0036587A3 EP0036587A3 (en) 1981-11-25
EP0036587B1 true EP0036587B1 (de) 1984-09-19

Family

ID=6097974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101887A Expired EP0036587B1 (de) 1980-03-21 1981-03-13 Kontaktklammer

Country Status (5)

Country Link
EP (1) EP0036587B1 (da)
JP (1) JPS56147378A (da)
CA (1) CA1146647A (da)
DE (2) DE3011066A1 (da)
DK (1) DK123781A (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211192A1 (de) * 1982-03-26 1983-10-06 Nicolay Gmbh Verfahren zur herstellung einer kontaktklemme und damit hergestellte kontaktklemme

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793355A (en) * 1954-02-11 1957-05-21 Vector Mfg Company Geophone clip

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234497A (en) * 1962-11-23 1966-02-08 Wayne M Condry Lineman's safety bridge
US3624590A (en) * 1968-09-25 1971-11-30 Medical Plastics Inc Clamp for disposable ground plate electrode
US4072388A (en) * 1977-04-06 1978-02-07 Marquette Electronics, Inc. Anti-snag device for electrode lead clips
US4178052A (en) * 1977-10-13 1979-12-11 Tronomed, Inc. Medical terminal clip member for attachment to patient electrodes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2793355A (en) * 1954-02-11 1957-05-21 Vector Mfg Company Geophone clip

Also Published As

Publication number Publication date
CA1146647A (en) 1983-05-17
DE3166110D1 (en) 1984-10-25
EP0036587A2 (de) 1981-09-30
DE3011066A1 (de) 1981-10-01
JPS56147378A (en) 1981-11-16
DK123781A (da) 1981-09-22
EP0036587A3 (en) 1981-11-25

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