CA1146647A - Contact clip - Google Patents

Contact clip

Info

Publication number
CA1146647A
CA1146647A CA000373518A CA373518A CA1146647A CA 1146647 A CA1146647 A CA 1146647A CA 000373518 A CA000373518 A CA 000373518A CA 373518 A CA373518 A CA 373518A CA 1146647 A CA1146647 A CA 1146647A
Authority
CA
Canada
Prior art keywords
clamping
cavities
parts
contact clip
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.)
Expired
Application number
CA000373518A
Other languages
French (fr)
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
Application granted granted Critical
Publication of CA1146647A publication Critical patent/CA1146647A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00Individual 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
    • H01R11/11End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/22End pieces terminating in a spring clip
    • H01R11/24End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip

Abstract

ABSTRACT OF THE DISCLOSURE
In an exemplary embodiment, two clamping parts which are mounted pivotally about a shaft for movement oppositely relative to one another in the manner of tongs, have a spring therebetween which compresses the clamping ends of the clamping parts for the purpose of clamping engagement with an electrode or the like. Manual gripping portions disposed on the other side of the pivot shaft from the clamping ends, are manually compressed for the purpose of open-ing the clamp connection, at least one of the manual gripping portions receives a conductor which electrically connects with at least one of the clamping ends.
It is the object of the disclosure to create a contact clip which is optimally ensured against breakage and which simultaneously presents no problems regarding cleansing. This object is achieved in that the gripping portions of the clamp-ing parts are provided with one cavity each, which cavities during pivotal move-ments of the clamping parts, movably interengage whereby, simultaneously, in every clamping part position between the clamped and open state, extensive seal-ing-off of the interior space toward the exterior is guaranteed due to the interengaging cavities, and that a spring for spreading the gripping portions to be manually operated is seated inside these cavities.

Description

6~
BACKGROUND OF T~1E ~NVENTION
___ ___ The invention relates to a ccn~ac~ clip for the purpose of connecting an electric conductor with a contact part, in particular an electrode, the c]ip comprising two clamping parts which are pivotally mounted about a shaft for movement oppositely relative to one another in the manner of a pair of ~ongs, between which clamping parts a spring is disposed which urges those ends of the clamping parts which serve the purpose of clamping the contact part in place, as long as the ends of the clamping part disposed on the other side of the shaft are not compressed manually for the purpose of opening the clamping connection, and of which manually compressible ends at least one receives an electrical conductor for conductive connection with at least one of the clamping ends.
From the German Utility Model 74 10 155, electrical contact clips or clamps with two types of spring pressure are prior-known. In the first type, which is mentioned as state of the art relating to the subject of the utility model, the pivot pin, which connects the two clamping parts, is sur-rounded by a helical spring which presses the two clamping parts together at their clamping ends. The helical spring is quite sturdy; however, its use en-tails problems of cleansing, so that an application for medical purposes is hardly possible. By contrast, the subject of the utility model comprises, as the second type, a spring which is designed as a ring sector. Such a spring presents no problems regarding cleansing. However, the advantage thus gained is paid for by an increased risk of breakage of the spring at the attachment locations of the ring sector.
SUMMARY OF T~IE INVENTION
. _ .
It is an object of the present invention to construct a contact clip which is optimally ensured against breakage and which, at the same time, presents no problems regarding cleansing.
The object is achieved in accordance with *he invention in that the clamping pa~ts, on t~e side of the pivot axis disposed cpposite the securing ends, are provided with one cavity each, which cavities are so designed and spatially so arranged relative to one anot~er that, in the case of pivot movements of the clamping parts, they movably engage into one another, whereby, simultaneously, in every clamping part position between a clamped and opened state, an extensive sealing-off of the interior space toward the exter;or is guaranteed due to the interengaging cavities, and that a spring is seated within these cavities for the purpose of spreading apart the ends of the clamping parts which are to be manually operated.
The invention guarantees a contamination-~ree inclusion of the spreading spring. Thus, no cleansing problems regarding the spring occur, so that the latter can exhibit a random, break-proof form (spiral-, coil-, leaf-form, or the like). The life of the contact clip is thus optimally increased.
Further advantages and details of the invention shall be apparent from the following description of an exemplary embodiment on the basis of the accompanying drawing sheet in conjunction with the subclaims; and other objects, features and advantages will be apparent from this detailed disclosure and from the appended claims.
BRIEF DESCRIPTION OP TIIE. DRAWINGS
~igure 1 illustrates the exemplary cmbodiment in plan view; and ~igure 2 illustrates a frontal vlew of the embodiment of Figure 1.
DETAII.ED DESCRIPTION
________ In Figure 1, the contact clip or clamp is comprised of two clamping parts 1 and 2, which are mounted pivotally about a shaft 3 so as to move oppositely relative to one another. Each clamping parts bears at its head end, in a lateral position, one metallic plate 4, 5. The plates 4 and 5 are formed to provide cooperating clamping jaws 6 and 7 with indentations or recesses 8 ~6~a~7 and 9 of semicylindrical configuration. The opposite ends 10 and 11 of the clamping parts, which can be pressed toge~her manually, are provided with de-pressions 12 and 13 against which the fingers o~ the user can be pressed. The end 10 of the upper clamping part 1 simultaneously serves the purpose of mechani-cal connection of an electric conducting cable 14. The connection is provided by means of an anti-kink sleeve 15. The electric conductor 16 of the cable 14, in the interior of the upper clamping part 1, is connected, via a clamping connection or soldered connection 17, with the input of a high frequency choke 18 or of a corresponding resistance. The output of the choke or of the resis-tance is connected with the clamping plate 4 ln an electrically conductive fashion via the additional line section 16. An electric contact thus results between the clamping plate 4 and the conductor of the conducting cable 14 via the choke or the resistance 18. Thus, via this line connection, electric physiological signals can be derived if, for example, the contact clip with the clamping jaws 6 and 7 is clamped onto an electrode.
In accordance with the invention, each end 10, or 11, of the clamping parts 1 and 2, which ends are to be manually opel~ated, possesses one cavity 19 and 21 each in the region of the contact pressure locations. Both cavities are generally box-shaped and are open on one side, the openings 20 and 22 of the cavities being directed towards one another. The cavity 19 here extends, with its opening 20, into the opening 22 of the lower cavity 21. Thus, in every position between the clamped and opened state of the clamping jaws 6 and 7, the two cavities 19 and 21, which are movably interengaging, form an ex-tensive sealing-off of the interior space toward the exterior. Finally, a compression spring 23 is then inserted in the interior space safeguarded in this manner against penetration of dirt, or the like. In the present instance, this spring is designed in the form of a coil (or helical) spring which abuts ~6~;i4~

at one end, against the base of the cavity 19, and, with ;ts other end, against the base of the cavity 21, with the object of achie~ing a pressure exertion on ~oth bases. Due to this constant pressure, the clamping jaws 6 and 7 are compressed, at the clamp-side ends of the clamping parts, to the illustrated position. If the clamp is to be opened, then pressure is exerted by means of the fingers of the hand on the grips or depressions 12 and 13.
The clamping jaws 6 and 7 are opened by manual pressure exerted on gripping portions 12 and 13 counter to the pressure of the spring 23.
Thus, a contact clip for the purpose of establishing a connection between an electric conductor 14 and, for example, an electrode, is created which operates with an unbreakable spring, which~ simultaneously protected against dirt, is situated in a cavity in the interior of the contact clip.
In the present exemplary embodiment, the clamping parts 1 and 2 are plastic injection molded parts. The connections 15 through 17 for the electric conducting cable 14, including the choke or the resistance 18, are thus completely extrusion-coated by plastic during the injection molding of parts 1 and 2. The plates 4 and 5 are arranged on the exterior side of the clamping parts, respectively. Except for the exposed clamping jaws 6 and 7, they can likewise be extrusion-coated with plastic from all sides during the injection moldlng of parts 1 and 2.
In forming the contact clip of the illustrated embodiment, the parts 16, 17 and 18 are electrically connected with the clamping plate 4, and then placed in a mold for plastic injection molding of clamping part 1 onto parts 4, 16, 17 and 18. The arrangement is such that the clamping jaw 6 of metal remains clear of plastic, so that firm electrical contact can be made with an electrode of cylindrical configuration conforming with the contour of recesses 8 and 9.

, The clamp.ing plates 4 and 5 except at the jaws 6 and 7 may be en-closed by the plastic of the injection molding process so as to be securely retained with the plastic material of clamping part 1. Alternatively the clamping plate 4 may be secured to the plastic material of clamping part 1 but otherwise not covered by the plastic material.
As shown in Figures 1 and 2, the clamping plate 4 may be positioned at one lateral side of the plastic material of the clamping part 1 so that an outer lateral surface of the metal clamping plate 4 as well as an outer end face are left exposed along with the clamping jaw 6. In this case, as shown in Figures 1 and 2, the clamping plates 4 and 5 are each partially coated or co~ered with the plastic material of parts 1 and 2 during the injection molding process, so that the clamping plates 4 and 5 are molded with the head ends of the injection molded parts 1 and 2.
It will be apparent that many modi~ications and variations may be effected without departing from the scope of the novel concepts and teachings of the present invention.

Claims (10)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A contact clip for connection of an electric conductor with a con-tact part, in particular an electrode, said contact clip comprising two clamping parts having a pivot shaft about which the clamping parts are pivotally movable oppositely relative to one another in the manner of tongs, said clamping parts having a spring therebetween, said clamping parts having cooperating clamping ends which are urged toward each other by the spring for the purpose of clamping engagement with a contact part, said clamping parts having operating ends on the other side of the shaft from the clamping ends and arranged for manual compression for the purpose of opening the clamp connection, at least one of the operating ends providing a mechanical conductor connection, an electrical conductor secured to the mechanical conductor connection and electrically con-nected with one of the clamping ends, the clamping parts, on the side of the pivot shaft opposite the clamping ends having confronting cavities, which cavities are of cooperating configuration and spatially arranged relative to one another in such a manner that, during pivotal movements of the clamping parts, the cavities movably interengage, whereby simultaneously, in every clamping part position between a clamped and opened state, due to the inter-engaging cavities, an extensive sealing off of the interior space of the cavities toward the exterior is guaranteed, and the spring being seated inside said cavities for the purpose of spreading the operating ends of the clamping parts which are to be manually operated.
2. A contact clip according to claim 1, with the operating ends of the clamping parts having manual engagement locations arranged for receiving direct manual pressure in effecting the opening of the clamp connection, the cavities being directly arranged in the region of said manual engagement locations of the operating ends.
3. A contact clip according to claim 1, with the operating ends of the clamping parts, which are to be manually operated, having cavity defining means defining said cavities which contain said spring, said cavity defining means being of box-like form open on one side and having openings which are directed toward one another, a first one of the cavity defining means defining one of the cavities having its opening at said one side thereof disposed within a second of the cavities and beneath the opening of a second one of said cavity defining means such that the cavity defining means provide an enclosed region containing said spring.
4. A contact clip according to claim 1, with the spring being a coil spring with opposite ends, said cavity defining means providing a base of one cavity engaging one end of the coil spring and providing a base of the other cavity engaging the other of the opposite ends of the coil spring such that the coil spring urges said bases away from each other to resiliently urge the clamping ends of the clamping parts toward each other.
5. A contact clip according to claim 1, with the clamping parts being comprised of plastic injection molded parts which are pivotally movable re-lative to each other about said pivot shaft, and said plastic injection molded parts having said cavities molded therein.
6. A contact clip according to claim 5, with the injection molded parts each having a head end; the clamping parts further comprising clamping plates which are molded with the head ends of said injection molded parts, said clamping plates providing clamping jaws with recesses.
7. A contact clip according to claim 6, with the clamping plates being laterally arranged on the injection molded parts.
8. A contact clip according to claim 5, with the one of the operating ends with the mechanical conductor connection, to which the electric conductor is connected, having at its interior electric circuit means for establishing the electric connection between the electric conductor and the one of the clamping ends.
9. A contact clip according to claim 8, with said electric circuit means comprising an impedance element which is extrusion-coated by the plastic.
10. A contact clip according to claim 6, with the plastic material of the injection molded parts covering at least one side of each of said clamping plates while leaving the clamping jaws exposed adjacent said recesses.
CA000373518A 1980-03-21 1981-03-20 Contact clip Expired CA1146647A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3011066.8 1980-03-21
DE19803011066 DE3011066A1 (en) 1980-03-21 1980-03-21 CONTACT CLIP

Publications (1)

Publication Number Publication Date
CA1146647A true CA1146647A (en) 1983-05-17

Family

ID=6097974

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000373518A Expired CA1146647A (en) 1980-03-21 1981-03-20 Contact clip

Country Status (5)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211192A1 (en) * 1982-03-26 1983-10-06 Nicolay Gmbh Method for producing a contact terminal, and a contact terminal produced using said method

Family Cites Families (5)

* 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
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

Also Published As

Publication number Publication date
EP0036587B1 (en) 1984-09-19
DK123781A (en) 1981-09-22
DE3011066A1 (en) 1981-10-01
EP0036587A3 (en) 1981-11-25
JPS56147378A (en) 1981-11-16
EP0036587A2 (en) 1981-09-30
DE3166110D1 (en) 1984-10-25

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